Merge pull request #3488 from cesanta/fut

fix unit tests

.github/workflows/fuzz.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
       with: { fetch-depth: 2 }
-    - run: make -C test ${{ matrix.target }} ARGS="-max_total_time=7200"
+    - run: make -C test ${{ matrix.target }} ARGS="-max_total_time=14400"
 
 # as we're not getting access to test units causing a problem, convert from the log:
 # base64 -d > dataofdeath

.github/workflows/nightly.yml

@@ -1,4 +1,4 @@
-name: Full build and test
+name: Full build
 on:
   schedule:
     - cron: '0 22 * * *' # run at 10 PM UTC
@@ -29,15 +29,28 @@ jobs:
           select: "-DMG_ENABLE_POLL=0 -DMG_ENABLE_EPOLL=0"
         - ssl: WOLFSSL
           select: "-DMG_ENABLE_POLL=1 -DMG_ENABLE_EPOLL=0"
+        include:
+        - ssl: BUILTIN
+          cc: gcc
+          target: test
+          select: "-DMG_ENABLE_POLL=0 -DMG_ENABLE_EPOLL=1 -DMG_ENABLE_CHACHA20=0"
     name: linux ${{ matrix.target }} CC=${{ matrix.cc }} SSL=${{ matrix.ssl }} TFLAGS=${{ matrix.select }}
     env:
       CC: ${{ matrix.cc }}
       SSL: ${{ matrix.ssl }}
-      TFLAGS: ${{ matrix.select }} -DMQTT_LOCALHOST
+      TFLAGS: ${{ matrix.select }} -DMQTT_LOCALHOST -DNO_ABORT
     steps:
     - uses: actions/checkout@v4
       with: { fetch-depth: 2 }
-    - run: sudo apt -y update ; sudo apt -y install libmbedtls-dev libwolfssl-dev && test/setup_mqtt_server.sh && make -C test ${{ matrix.target }}
+    - uses: webfactory/ssh-agent@v0.9.1
+      with:
+            ssh-private-key: ${{ secrets.HEALTH_TESTS_SSH_KEY }}
+    - run: sudo apt -y update ; sudo apt -y install libmbedtls-dev libwolfssl-dev && test/setup_mqtt_server.sh && make -C test ${{ matrix.target }} > log
+    - if: success() || failure()
+      run: |
+        cat log
+        test/health.awk < log > json
+        scp -o "StrictHostKeyChecking=no" json "root@176.9.217.245:/data/downloads/health/linux_${{ matrix.target }}_${{ matrix.cc }}_${{ matrix.ssl }}_${{ matrix.select }}_$(date +"%Y%m%d").json"
   mip:
     runs-on: ubuntu-latest
     strategy:
@@ -54,11 +67,20 @@ jobs:
     env:
       CC: ${{ matrix.cc }}
       SSL: ${{ matrix.ssl }}
-      TFLAGS: -DMQTT_LOCALHOST
+      TFLAGS: -DMQTT_LOCALHOST -DNO_ABORT
     steps:
     - uses: actions/checkout@v4
       with: { fetch-depth: 2 }
-    - run: if [ "${{ matrix.target }}" == "mip_tap_test" ]; then ./test/setup_ga_network.sh ; fi && sudo apt -y update ; sudo apt -y install libmbedtls-dev libwolfssl-dev && make -C test ${{ matrix.target }} IPV6=0
+    - uses: webfactory/ssh-agent@v0.9.1
+      with:
+            ssh-private-key: ${{ secrets.HEALTH_TESTS_SSH_KEY }}
+    - run: if [ "${{ matrix.target }}" == "mip_tap_test" ]; then ./test/setup_ga_network.sh ; export IPV6=0; else export IPV6=1 ; fi && sudo apt -y update ; sudo apt -y install libmbedtls-dev libwolfssl-dev && make -C test ${{ matrix.target }} > log
+    - if: success() || failure()
+      run: |
+        cat log
+        test/health.awk < log > json
+        scp -o "StrictHostKeyChecking=no" json "root@176.9.217.245:/data/downloads/health/${{ matrix.target }}_${{ matrix.cc }}_${{ matrix.ssl }}_$(date +"%Y%m%d").json"
+
   mip89:
     runs-on: ubuntu-latest
     strategy:
@@ -70,7 +92,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
       with: { fetch-depth: 2 }
-    - run: make -C test ${{ matrix.target }} 
+    - run: make -C test ${{ matrix.target }} IPV6=1
   s390:
     runs-on: ubuntu-latest
     strategy:
@@ -128,32 +150,37 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # Mongoose does not work with WolfSSL version in MacOS
+        ssl: ["", BUILTIN, MBEDTLS, OPENSSL, WOLFSSL]
-        ssl: ["", BUILTIN, MBEDTLS, OPENSSL] # , WOLFSSL]
         select: [-DMG_ENABLE_POLL=0, -DMG_ENABLE_POLL=1]
-        include:
-        - ssl: MBEDTLS
-          env:
-            # MbedTLS version in MacOS refuses to validate a certificate without a hostname, causing MQTT tests to fail when using MQTT_LOCALHOST
-            tflags: -DNO_MQTT_TESTS 
         exclude:
         - ssl: MBEDTLS
           select: -DMG_ENABLE_POLL=0
+        - ssl: MBEDTLS                # see issue#2694
+          select: -DMG_ENABLE_POLL=1
         - ssl: OPENSSL
           select: -DMG_ENABLE_POLL=0
-        #- ssl: WOLFSSL
+        - ssl: WOLFSSL
-        #  select: -DMG_ENABLE_POLL=0
+          select: -DMG_ENABLE_POLL=0
     name: macos SSL=${{ matrix.ssl }} TFLAGS=${{ matrix.select }}
     env:
       SSL: ${{ matrix.ssl }}
-      TFLAGS: ${{ matrix.select }} -DMQTT_LOCALHOST ${{ matrix.env.tflags }} -Wno-sign-conversion # Workaround for MbedTLS 3.5.0
+      TFLAGS: ${{ matrix.select }} -DMQTT_LOCALHOST ${{ matrix.env.tflags }} -DNO_ABORT -Wno-sign-conversion -Wno-undef # Workarounds for MbedTLS
       HOMEBREW_NO_AUTO_UPDATE: 1
     steps:
     - uses: actions/checkout@v4
       with: { fetch-depth: 2 }
-    - run: brew install mbedtls wolfssl mosquitto # jq openssl already pre-installed
+    - uses: webfactory/ssh-agent@v0.9.1
+      with:
+            ssh-private-key: ${{ secrets.HEALTH_TESTS_SSH_KEY }}
+    - run: brew install mbedtls wolfssl mosquitto gawk # jq openssl already pre-installed
     - run: /opt/homebrew/opt/mosquitto/sbin/mosquitto -c /Users/runner/work/mongoose/mongoose/test/mosquitto.conf.macos &
-    - run: make -C test test ASAN_OPTIONS= MBEDTLS=$(echo $(brew --cellar)/mbedtls*/*) OPENSSL=$(echo $(brew --cellar)/openssl*/*) WOLFSSL=$(echo $(brew --cellar)/wolfssl*/*)
+    - run: make -C test test ASAN_OPTIONS= MBEDTLS=$(echo $(brew --cellar)/mbedtls*/*) OPENSSL=$(echo $(brew --cellar)/openssl*/*) WOLFSSL=$(echo $(brew --cellar)/wolfssl*/*) > log
+    - if: success() || failure()
+      run: |
+        cat log
+        test/health.awk < log > json
+        scp -o "StrictHostKeyChecking=no" json "root@176.9.217.245:/data/downloads/health/macos_test_cc_${{ matrix.ssl }}_${{ matrix.select }}_$(date +"%Y%m%d").json"
+
   windows:
     runs-on: ubuntu-latest
     strategy:
@@ -169,11 +196,20 @@ jobs:
     name: windows ${{ matrix.target }} SSL=${{ matrix.ssl }} TFLAGS=${{ matrix.select }}
     env:
       SSL: ${{ matrix.ssl }}
-      TFLAGS: ${{ matrix.select }} -DMQTT_LOCALHOST
+      TFLAGS: ${{ matrix.select }} -DMQTT_LOCALHOST -DNO_ABORT
     steps:
     - uses: actions/checkout@v4
       with: { fetch-depth: 2 }
-    - run: ./test/setup_mqtt_server.sh && make -C test ${{ matrix.target }} 
+    - uses: webfactory/ssh-agent@v0.9.1
+      with:
+            ssh-private-key: ${{ secrets.HEALTH_TESTS_SSH_KEY }}
+    - run: ./test/setup_mqtt_server.sh && make -C test ${{ matrix.target }} > log
+    - if: success() || failure()
+      run: |
+        cat log
+        test/health.awk < log > json
+        scp -o "StrictHostKeyChecking=no" json "root@176.9.217.245:/data/downloads/health/windows_${{ matrix.target }}_${{ matrix.cc }}_${{ matrix.ssl }}_${{ matrix.select }}_$(date +"%Y%m%d").json"
+ 
   arm:
     runs-on: ubuntu-latest
     strategy:
@@ -204,9 +240,18 @@ jobs:
     name: tutorials ${{ matrix.ssl }}
     steps:
     - uses: actions/checkout@v4
+    - uses: webfactory/ssh-agent@v0.9.1
+      with:
+            ssh-private-key: ${{ secrets.HEALTH_TESTS_SSH_KEY }}
     - run: sudo apt -y install libpcap-dev
-    - run: make -C test tutorials CFLAGS_EXTRA="${{ matrix.ssl }}"
+    - run: make -C test tutorials CFLAGS_EXTRA="${{ matrix.ssl }}" > log
+    - if: success() || failure()
+      run: |
+        cat log
+        test/health.awk < log > json
+        scp -o "StrictHostKeyChecking=no" json "root@176.9.217.245:/data/downloads/health/tutorials_${{ matrix.ssl }}_$(date +"%Y%m%d").json"
     - run: make -C test clean_tutorials
+
   tutorials_win:
     runs-on: windows-latest
     strategy:
@@ -284,6 +329,7 @@ jobs:
           - path: pico-sdk/pico-2-w-picosdk-baremetal-builtin
           - path: pico-sdk/w5500-evb-pico-picosdk-baremetal-builtin
           - path: pico-sdk/w5500-evb-pico2-picosdk-baremetal-builtin
+          - path: pico-sdk/w55rp20-evb-pico-picosdk-baremetal-builtin
           - path: stm32/nucleo-f429zi-make-baremetal-builtin
           - path: stm32/nucleo-f429zi-make-freertos-builtin
           - path: stm32/nucleo-f746zg-make-baremetal-builtin
@@ -454,137 +500,10 @@ jobs:
       - run: sudo pip install yq
       - run: cd test/cube && make
 
-  test_f7:
+#  xpresso_examples:
-    runs-on: ubuntu-latest
+#    runs-on: ubuntu-latest
-    steps:
+#    steps:
-    - uses: actions/checkout@v4
+#      - uses: actions/checkout@v4
-      with: { fetch-depth: 2 }
+#        with: { fetch-depth: 2 }
-    - name: baremetal
+#      - run: sudo pip install yq
-      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
+#      - run: cd test/xpresso && make
-    - run: make -C tutorials/stm32/nucleo-f746zg-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    - run: make -C tutorials/stm32/nucleo-f746zg-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    - run: make -C tutorials/stm32/nucleo-f746zg-make-freertos-tcp test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    - name: Cube
-      run: echo # nothing specific to install or do
-#    - run: make -C test/cube test PROJECTS=../../tutorials/stm32/nucleo-f746zg-cube-baremetal-builtin VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=5
-#    - run: make -C test/cube test PROJECTS=../../tutorials/stm32/nucleo-f746zg-cube-freertos-builtin VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=5    
-    - run: make -C test/cube test PROJECTS=../../tutorials/stm32/nucleo-f746zg-cube-freertos-lwip VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=5
-
-  test_f4:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-      with: { fetch-depth: 2 }
-    - name: baremetal
-      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
-    - run: make -C tutorials/stm32/nucleo-f429zi-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    - run: make -C tutorials/stm32/nucleo-f429zi-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    - name: Cube
-      run: echo # nothing specific to install or do
-#    - run: make -C test/cube test PROJECTS=../../tutorials/stm32/nucleo-f429zi-cube-baremetal-builtin VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=2
-#    - run: make -C test/cube test PROJECTS=../../tutorials/stm32/nucleo-f429zi-cube-freertos-builtin VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=2
-    - run: make -C test/cube test PROJECTS=../../tutorials/stm32/nucleo-f429zi-cube-freertos-lwip VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=2
-
-  test_h743:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-      with: { fetch-depth: 3 }
-    - name: baremetal
-      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
-    - run: make -C tutorials/stm32/nucleo-h743zi-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    - run: make -C tutorials/stm32/nucleo-h743zi-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-#    - name: Cube
-#      run: echo # nothing specific to install or do
-#    - run: make -C test/cube test PROJECTS=../../tutorials/stm32/nucleo-h743zi-cube-baremetal-builtin VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=6
-#    - run: make -C test/cube test PROJECTS=../../tutorials/stm32/nucleo-h743zi-cube-freertos-builtin VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=6
-
-  test_h723:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-      with: { fetch-depth: 3 }
-    - name: baremetal
-      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
-    - run: make -C tutorials/stm32/nucleo-h723zg-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    - run: make -C tutorials/stm32/nucleo-h723zg-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    
-  test_h5:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-      with: { fetch-depth: 3 }
-    - name: baremetal
-      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
-    - run: make -C tutorials/stm32/nucleo-h563zi-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    - run: make -C tutorials/stm32/nucleo-h563zi-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-
-  test_rt1020:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-      with: { fetch-depth: 3 }
-    - name: baremetal
-      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
-    - run: make -C tutorials/nxp/rt1020-evk-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    - run: make -C tutorials/nxp/rt1020-evk-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-
-  test_rt1060:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-      with: { fetch-depth: 3 }
-    - name: baremetal
-      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
-    - run: make -C tutorials/nxp/rt1060-evk-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    - run: make -C tutorials/nxp/rt1060-evk-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-
-  test_rt1170:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-      with: { fetch-depth: 3 }
-    - name: baremetal
-      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
-    - run: make -C tutorials/nxp/rt1170-evk-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    - run: make -C tutorials/nxp/rt1170-evk-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-
-  test_ra6m4:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-      with: { fetch-depth: 3 }
-    - name: baremetal
-      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
-    - run: make -C tutorials/renesas/ek-ra6m4-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-#    - run: make -C tutorials/renesas/ek-ra6m4-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-
-  test_tm4c:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-      with: { fetch-depth: 2 }
-    - name: baremetal
-      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
-    - run:  make -C tutorials/ti/ek-tm4c1294xl-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    - run:  make -C tutorials/ti/ek-tm4c1294xl-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-
-  test_same54:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-      with: { fetch-depth: 2 }
-    - name: baremetal
-      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
-    - run:  make -C tutorials/http/device-dashboard/microchip/same54-xpro test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-    - run:  make -C tutorials/mqtt/mqtt-client/microchip/same54-xpro test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-
-  test_pico_w5500:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-      with: { fetch-depth: 2 }
-    - name: SDK
-      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
-    - run:  make -C tutorials/pico-sdk/w5500-evb-pico-picosdk-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
-

.github/workflows/nightly_tests.yml

@@ -0,0 +1,143 @@
+name: Full test
+on:
+  schedule:
+    - cron: '0 23 * * *' # run at 11 PM UTC
+  # Allow manual runs
+  workflow_dispatch:
+env:
+  IPV6: 0
+jobs:
+
+  test_f7:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with: { fetch-depth: 2 }
+    - name: baremetal
+      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
+    - run: make -C tutorials/stm32/nucleo-f746zg-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    - run: make -C tutorials/stm32/nucleo-f746zg-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    - run: make -C tutorials/stm32/nucleo-f746zg-make-freertos-tcp test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    - name: Cube
+      run: sudo pip install yq
+#    - run: make -C test/cube PROJECTS=../../tutorials/stm32/nucleo-f746zg-cube-baremetal-builtin VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=5
+#    - run: make -C test/cube PROJECTS=../../tutorials/stm32/nucleo-f746zg-cube-freertos-builtin VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=5    
+    - run: make -C test/cube PROJECTS=../../tutorials/stm32/nucleo-f746zg-cube-freertos-lwip VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=5
+
+  test_f4:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with: { fetch-depth: 2 }
+    - name: baremetal
+      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
+    - run: make -C tutorials/stm32/nucleo-f429zi-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    - run: make -C tutorials/stm32/nucleo-f429zi-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    - name: Cube
+      run: sudo pip install yq
+#    - run: make -C test/cube PROJECTS=../../tutorials/stm32/nucleo-f429zi-cube-baremetal-builtin VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=2
+#    - run: make -C test/cube PROJECTS=../../tutorials/stm32/nucleo-f429zi-cube-freertos-builtin VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=2
+    - run: make -C test/cube PROJECTS=../../tutorials/stm32/nucleo-f429zi-cube-freertos-lwip VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=2
+
+  test_h743:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with: { fetch-depth: 3 }
+    - name: baremetal
+      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
+    - run: make -C tutorials/stm32/nucleo-h743zi-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    - run: make -C tutorials/stm32/nucleo-h743zi-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+#    - name: Cube
+#      run: echo # nothing specific to install or do
+#    - run: make -C test/cube PROJECTS=../../tutorials/stm32/nucleo-h743zi-cube-baremetal-builtin VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=6
+#    - run: make -C test/cube PROJECTS=../../tutorials/stm32/nucleo-h743zi-cube-freertos-builtin VCON_API_KEY=${{secrets.VCON_API_KEY}} DEVICE=6
+
+  test_h723:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with: { fetch-depth: 3 }
+    - name: baremetal
+      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
+    - run: make -C tutorials/stm32/nucleo-h723zg-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    - run: make -C tutorials/stm32/nucleo-h723zg-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    
+  test_h5:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with: { fetch-depth: 3 }
+    - name: baremetal
+      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
+    - run: make -C tutorials/stm32/nucleo-h563zi-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    - run: make -C tutorials/stm32/nucleo-h563zi-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+
+  test_rt1020:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with: { fetch-depth: 3 }
+    - name: baremetal
+      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
+    - run: make -C tutorials/nxp/rt1020-evk-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    - run: make -C tutorials/nxp/rt1020-evk-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+
+  test_rt1060:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with: { fetch-depth: 3 }
+    - name: baremetal
+      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
+    - run: make -C tutorials/nxp/rt1060-evk-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    - run: make -C tutorials/nxp/rt1060-evk-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+
+  test_rt1170:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with: { fetch-depth: 3 }
+    - name: baremetal
+      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
+    - run: make -C tutorials/nxp/rt1170-evk-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    - run: make -C tutorials/nxp/rt1170-evk-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+
+  test_ra6m4:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with: { fetch-depth: 3 }
+    - name: baremetal
+      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
+    - run: make -C tutorials/renesas/ek-ra6m4-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+#    - run: make -C tutorials/renesas/ek-ra6m4-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+
+  test_tm4c:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with: { fetch-depth: 2 }
+    - name: baremetal
+      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
+    - run:  make -C tutorials/ti/ek-tm4c1294xl-make-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    - run:  make -C tutorials/ti/ek-tm4c1294xl-make-freertos-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+
+  test_same54:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with: { fetch-depth: 2 }
+    - name: baremetal
+      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
+    - run:  make -C tutorials/http/device-dashboard/microchip/same54-xpro test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+    - run:  make -C tutorials/mqtt/mqtt-client/microchip/same54-xpro test VCON_API_KEY=${{secrets.VCON_API_KEY}}
+
+  test_pico_w5500:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with: { fetch-depth: 2 }
+    - name: SDK
+      run: sudo apt -y update && sudo apt -y install gcc-arm-none-eabi
+    - run:  make -C tutorials/pico-sdk/w5500-evb-pico-picosdk-baremetal-builtin test VCON_API_KEY=${{secrets.VCON_API_KEY}}

.github/workflows/on_demand.yml

@@ -0,0 +1,32 @@
+name: On demand ad hoc test
+on:
+  workflow_dispatch:
+env:
+  IPV6: 0
+jobs:
+  macos:
+    runs-on: macos-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ssl: [MBEDTLS, WOLFSSL]
+        select: [-DMG_ENABLE_POLL=1]
+    name: macos SSL=${{ matrix.ssl }} TFLAGS=${{ matrix.select }}
+    env:
+      SSL: ${{ matrix.ssl }}
+      TFLAGS: ${{ matrix.select }} -DMQTT_LOCALHOST -DNO_ABORT -Wno-sign-conversion -Wno-undef # Workarounds for MbedTLS
+      HOMEBREW_NO_AUTO_UPDATE: 1
+    steps:
+    - uses: actions/checkout@v4
+      with: { fetch-depth: 2 }
+    - uses: webfactory/ssh-agent@v0.9.1
+      with:
+            ssh-private-key: ${{ secrets.HEALTH_TESTS_SSH_KEY }}
+    - run: brew install mbedtls wolfssl mosquitto gawk # jq openssl already pre-installed
+    - run: /opt/homebrew/opt/mosquitto/sbin/mosquitto -c /Users/runner/work/mongoose/mongoose/test/mosquitto.conf.macos &
+    - run: make -C test test ASAN_OPTIONS= MBEDTLS=$(echo $(brew --cellar)/mbedtls*/*) OPENSSL=$(echo $(brew --cellar)/openssl*/*) WOLFSSL=$(echo $(brew --cellar)/wolfssl*/*) > log
+    - if: success() || failure()
+      run: |
+        cat log
+        test/health.awk < log > json
+        scp -o "StrictHostKeyChecking=no" json "root@176.9.217.245:/data/downloads/health/macos_test_cc_${{ matrix.ssl }}_${{ matrix.select }}_$(date +"%Y%m%d").json"

.github/workflows/quicktest.yml

@@ -170,6 +170,7 @@ jobs:
           - path: pico-sdk/pico-2-w-picosdk-baremetal-builtin
           - path: pico-sdk/w5500-evb-pico-picosdk-baremetal-builtin
           - path: pico-sdk/w5500-evb-pico2-picosdk-baremetal-builtin
+          - path: pico-sdk/w55rp20-evb-pico-picosdk-baremetal-builtin
           - path: stm32/nucleo-f429zi-make-baremetal-builtin
           - path: stm32/nucleo-f429zi-make-freertos-builtin
           - path: stm32/nucleo-f746zg-make-baremetal-builtin
@@ -347,6 +348,22 @@ jobs:
       - if: ${{ env.GO == 1 }}
         run: cd test/cube && make
 
+#  xpresso_examples:
+#    runs-on: ubuntu-latest
+#    env:
+#      GO: 0
+#    steps:
+#      - uses: actions/checkout@v4
+#        with: { fetch-depth: 2 }
+#      - run: |
+#          if ./test/match_changed_files.sh '^src|tutorials/stm32/nucleo-*-cube-*'; then
+#            echo GO=1 >> $GITHUB_ENV
+#            sudo pip install yq
+#          fi
+#      - if: ${{ env.GO == 1 }}
+#        run: cd test/xpresso && make
+
+
 #  test_f7:
 #    runs-on: ubuntu-latest
 #    env:

.github/workflows/zephyr.yml

@@ -10,17 +10,18 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        revno: ["--mr v3.7-branch", "--mr v4.2.0"] # LTS, latest stable
+        revno: ["--mr v3.7-branch", "--mr v4.2.0", "--mr v4.3.0"] # LTS, latest stable
     name: Zephyr ${{ matrix.revno }}
     steps:
       - uses: actions/checkout@v4
         with: { fetch-depth: 2 }
       - run: test/setup_ga_docker_filesystem.sh
-      - run: make -C tutorials/zephyr init REPO=zephyrprojectrtos/ci REVNO="${{ matrix.revno }}"
+      - run: make -C tutorials/zephyr init REPO=zephyrprojectrtos/ci:v0.28.8 REVNO="${{ matrix.revno }}"
       - run: make -C tutorials/zephyr minify REVNO="${{ matrix.revno }}"
       - run: make -C tutorials/zephyr update
-      - run: make -C tutorials/zephyr/device-dashboard build
+      - run: make -C tutorials/zephyr/device-dashboard build REPO=zephyrprojectrtos/ci:v0.28.8
-      - run: make -C tutorials/zephyr/http-client build
+      - run: make -C tutorials/zephyr/http-client build REPO=zephyrprojectrtos/ci:v0.28.8
-      - run: make -C tutorials/zephyr/http-server build
+      - run: make -C tutorials/zephyr/http-server build REPO=zephyrprojectrtos/ci:v0.28.8
-      - run: make -C tutorials/zephyr/mqtt-aws-client build
+      - run: make -C tutorials/zephyr/mqtt-aws-client build REPO=zephyrprojectrtos/ci:v0.28.8
-      - run: make -C tutorials/zephyr/websocket-server build
+      - run: make -C tutorials/zephyr/websocket-server build REPO=zephyrprojectrtos/ci:v0.28.8
+# Latest CI image does not work with pre 4.4, they changed some SDK paths

LICENSE

@@ -1,5 +1,5 @@
 Copyright (c) 2004-2013 Sergey Lyubka
-Copyright (c) 2013-2025 Cesanta Software Limited
+Copyright (c) 2013-2026 Cesanta Software Limited
 All rights reserved
 
 This software is dual-licensed: you can redistribute it and/or modify

README.md

@@ -5,7 +5,7 @@
 [![Code Coverage](https://codecov.io/gh/cesanta/mongoose/branch/master/graph/badge.svg)](https://codecov.io/gh/cesanta/mongoose)
 [![Fuzzing Status](https://oss-fuzz-build-logs.storage.googleapis.com/badges/mongoose.svg)](https://issues.oss-fuzz.com/issues?sort=-opened&can=1&q=proj:mongoose)
 
-Mongoose is a network library for C/C++.  It provides event-driven non-blocking
+<img src="https://mongoose.ws/images/logo.svg" width="48" height="48" align="left" style="float:left;" /> Mongoose is a network library for C/C++.  It provides event-driven non-blocking
 APIs for TCP, UDP, HTTP, WebSocket, MQTT, and other protocols.  It is designed
 for connecting devices and bringing them online. On the market since 2004, used
 by vast number of open source and commercial products - it even runs on the
@@ -198,6 +198,10 @@ We take security seriously:
   have specific security requirements and run independent security audits,
   of which we get notified and in case of any issue, act similar to (3).
 
+## How to report security vulnerabilities
+
+Please send an email to support@cesanta.com, with the full information.
+Do NOT create a github issue.
 
 ## Articles
 
@@ -209,6 +213,14 @@ Technical guides and deep dives into embedded web servers, WebUI integration and
 - [STM32 WebSocket Guide](https://mongoose.ws/articles/stm32-websocket-guide/)
 - [Web File Manager on STM32, ESP32 and Embedded Linux](https://mongoose.ws/articles/building-a-web-file-manager-on-stm32-esp32-embedded-linux/)
 - [Web dashboard on Zephyr RTOS](https://mongoose.ws/articles/web-dashboard-on-zephyr-rtos/)
+- [Limiting TCP/IP RAM usage on STM32](https://mongoose.ws/articles/limiting-tcpip-ram-usage-on-stm32/)
+- [STM32 Ethernet explained](https://mongoose.ws/articles/stm32-ethernet-explained/)
+- [MQTT on a Microcontroller](https://mongoose.ws/articles/mqtt-on-a-microcontroller/)
+- [STM32 OTA Firmware Update](https://mongoose.ws/articles/stm32-ota-firmware-update/)
+- [RP2350 OTA Firmware Update](https://mongoose.ws/articles/rp2350-ota-firmware-update/)
+- [STM32 Ethernet and caches](https://mongoose.ws/articles/stm32-ethernet-and-cache/)
+- [NXP RW612 OTA Firmware Update](https://mongoose.ws/articles/rw612-ota-firmware-update/)
+- [lwIP vs Mongoose - TCP/IP Stack Integration Benchmark](https://mongoose.ws/articles/lwip-vs-mongoose-tcpip-stack-integration/)
 
 
 ## Contributions

mongoose.h

@@ -20,7 +20,7 @@
 #ifndef MONGOOSE_H
 #define MONGOOSE_H
 
-#define MG_VERSION "7.19"
+#define MG_VERSION "7.21"
 
 #ifdef __cplusplus
 extern "C" {
@@ -159,11 +159,14 @@ extern "C" {
 #define MG_ENABLE_TCPIP 1  // Enable built-in TCP/IP stack
 #endif
 
-#if MG_ENABLE_TCPIP && !defined(MG_ENABLE_DRIVER_STM32F) && !defined(MG_ENABLE_DRIVER_STM32H)
+#if MG_ENABLE_TCPIP && !defined(MG_ENABLE_DRIVER_STM32F) && \
+    !defined(MG_ENABLE_DRIVER_STM32H) && !defined(MG_ENABLE_DRIVER_STM32N)
 #if defined(STM32F1) || defined(STM32F2) || defined(STM32F4) || defined(STM32F7)
 #define MG_ENABLE_DRIVER_STM32F 1
 #elif defined(STM32H5) || defined(STM32H7)
 #define MG_ENABLE_DRIVER_STM32H 1
+#elif defined(STM32N6)
+#define MG_ENABLE_DRIVER_STM32N 1
 #else
 #error Select a driver in mongoose_config.h
 #endif
@@ -173,7 +176,8 @@ extern "C" {
 #define MG_TLS MG_TLS_BUILTIN
 #endif
 
-#if !defined(MG_OTA) && defined(STM32F1) || defined(STM32F2) || defined(STM32F4) || defined(STM32F7)
+#if !defined(MG_OTA) && defined(STM32F1) || defined(STM32F2) || \
+    defined(STM32F4) || defined(STM32F7)
 #define MG_OTA MG_OTA_STM32F
 #elif !defined(MG_OTA) && defined(STM32H5)
 #define MG_OTA MG_OTA_STM32H5
@@ -285,6 +289,7 @@ extern "C" {
 #define mode_t size_t
 #include <alloca.h>
 #include <time.h>
+#define strdup(s) ((char *) mg_strdup(mg_str(s)).buf)
 #elif defined(__CCRH__)
 #else
 #include <sys/stat.h>
@@ -650,7 +655,10 @@ typedef enum { false = 0, true = 1 } bool;
 #endif
 #endif
 
-typedef unsigned long nfds_t;
+#if defined(MG_ENABLE_POLL) && MG_ENABLE_POLL && (!defined(MG_ENABLE_LWIP) || !MG_ENABLE_LWIP)
+typedef unsigned long nfds_t; // see #3388
+#endif
+
 #if defined(_MSC_VER)
 #if MG_ENABLE_WINSOCK
 #pragma comment(lib, "ws2_32.lib")
@@ -721,13 +729,15 @@ typedef int socklen_t;
 #if MG_ARCH == MG_ARCH_ZEPHYR
 
 #include <zephyr/kernel.h>
+#include <zephyr/net/socket.h>
+// #include <zephyr/posix/dirent.h>
+#include <zephyr/posix/fcntl.h>
+#include <zephyr/posix/sys/select.h>
+#include <zephyr/random/random.h>
 #include <zephyr/version.h>
 
 #include <ctype.h>
 #include <errno.h>
-#include <zephyr/net/socket.h>
-#include <zephyr/posix/fcntl.h>
-#include <zephyr/posix/sys/select.h>
 #include <stdarg.h>
 #include <stdbool.h>
 #include <stdint.h>
@@ -1056,10 +1066,34 @@ struct timeval {
 #define MG_TCPIP_GW MG_IPV4(0, 0, 0, 0)  // Default is 0.0.0.0 (DHCP)
 #endif
 
+#if MG_ENABLE_IPV6
+
+#ifndef MG_TCPIP_GLOBAL
+#define MG_TCPIP_GLOBAL MG_IPV6(0, 0, 0, 0, 0, 0, 0, 0)
+#endif
+
+#ifndef MG_TCPIP_IPV6_LINKLOCAL
+#define MG_TCPIP_IPV6_LINKLOCAL MG_IPV6(0, 0, 0, 0, 0, 0, 0, 0)
+#endif
+
+#ifndef MG_TCPIP_PREFIX_LEN
+#define MG_TCPIP_PREFIX_LEN 0
+#endif
+
+#ifndef MG_TCPIP_GW6
+#define MG_TCPIP_GW6 MG_IPV6(0, 0, 0, 0, 0, 0, 0, 0)
+#endif
+
+#endif
+
 #ifndef MG_SET_MAC_ADDRESS
 #define MG_SET_MAC_ADDRESS(mac)
 #endif
 
+#ifndef MG_TCPIP_DHCPNAME_SIZE
+#define MG_TCPIP_DHCPNAME_SIZE 18  // struct mg_tcpip_if :: dhcp_name size
+#endif
+
 #ifndef MG_SET_WIFI_CONFIG
 #define MG_SET_WIFI_CONFIG(data)
 #endif
@@ -1206,7 +1240,6 @@ size_t mg_vsnprintf(char *buf, size_t len, const char *fmt, va_list *ap);
 size_t mg_snprintf(char *, size_t, const char *fmt, ...);
 char *mg_vmprintf(const char *fmt, va_list *ap);
 char *mg_mprintf(const char *fmt, ...);
-size_t mg_queue_vprintf(struct mg_queue *, const char *fmt, va_list *);
 size_t mg_queue_printf(struct mg_queue *, const char *fmt, ...);
 
 // %M print helper functions
@@ -1218,10 +1251,12 @@ size_t mg_print_ip_port(void (*out)(char, void *), void *arg, va_list *ap);
 size_t mg_print_ip4(void (*out)(char, void *), void *arg, va_list *ap);
 size_t mg_print_ip6(void (*out)(char, void *), void *arg, va_list *ap);
 size_t mg_print_mac(void (*out)(char, void *), void *arg, va_list *ap);
+size_t mg_print_l2addr(void (*out)(char, void *), void *arg, va_list *ap);
 
 // Various output functions
-void mg_pfn_iobuf(char ch, void *param);  // param: struct mg_iobuf *
+void mg_pfn_iobuf(char ch, void *param);           // param: struct mg_iobuf *
-void mg_pfn_stdout(char c, void *param);  // param: ignored
+void mg_pfn_iobuf_noresize(char ch, void *param);  // param: struct mg_iobuf *
+void mg_pfn_stdout(char c, void *param);           // param: ignored
 
 // A helper macro for printing JSON: mg_snprintf(buf, len, "%m", MG_ESC("hi"))
 #define MG_ESC(str) mg_print_esc, 0, (str)
@@ -1243,12 +1278,18 @@ void mg_log_set_fn(mg_pfn_t fn, void *param);
 #define mg_log_set(level_) mg_log_level = (level_)
 
 #if MG_ENABLE_LOG
-#define MG_LOG(level, args)                                 \
+#if !defined(_MSC_VER) && \
-  do {                                                      \
+    (!defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L)
-    if ((level) <= mg_log_level) {                          \
+#define MG___FUNC__ ""
-      mg_log_prefix((level), __FILE__, __LINE__, __func__); \
+#else
-      mg_log args;                                          \
+#define MG___FUNC__ __func__  // introduced in C99
-    }                                                       \
+#endif
+#define MG_LOG(level, args)                                    \
+  do {                                                         \
+    if ((level) <= mg_log_level) {                             \
+      mg_log_prefix((level), __FILE__, __LINE__, MG___FUNC__); \
+      mg_log args;                                             \
+    }                                                          \
   } while (0)
 #else
 #define MG_LOG(level, args) \
@@ -1364,6 +1405,16 @@ void mg_delayms(unsigned int ms);
 
 #define MG_IPV4(a, b, c, d) mg_htonl(MG_U32(a, b, c, d))
 
+#define MG_IPV6(a, b, c, d, e, f, g ,h) \
+  { (uint8_t)((a)>>8),(uint8_t)(a), \
+    (uint8_t)((b)>>8),(uint8_t)(b), \
+    (uint8_t)((c)>>8),(uint8_t)(c), \
+    (uint8_t)((d)>>8),(uint8_t)(d), \
+    (uint8_t)((e)>>8),(uint8_t)(e), \
+    (uint8_t)((f)>>8),(uint8_t)(f), \
+    (uint8_t)((g)>>8),(uint8_t)(g), \
+    (uint8_t)((h)>>8),(uint8_t)(h) }
+
 // For printing IPv4 addresses: printf("%d.%d.%d.%d\n", MG_IPADDR_PARTS(&ip))
 #define MG_U8P(ADDR) ((uint8_t *) (ADDR))
 #define MG_IPADDR_PARTS(ADDR) \
@@ -1378,6 +1429,14 @@ void mg_delayms(unsigned int ms);
   ((uint32_t) (((uint32_t) MG_U8P(p)[0] << 24U) | \
                ((uint32_t) MG_U8P(p)[1] << 16U) | \
                ((uint32_t) MG_U8P(p)[2] << 8U) | MG_U8P(p)[3]))
+#define MG_LOAD_BE64(p)                           \
+  ((uint64_t) (((uint64_t) MG_U8P(p)[0] << 56U) | \
+               ((uint64_t) MG_U8P(p)[1] << 48U) | \
+               ((uint64_t) MG_U8P(p)[2] << 40U) | \
+               ((uint64_t) MG_U8P(p)[3] << 32U) | \
+               ((uint64_t) MG_U8P(p)[4] << 24U) | \
+               ((uint64_t) MG_U8P(p)[5] << 16U) | \
+               ((uint64_t) MG_U8P(p)[6] << 8U) | MG_U8P(p)[7]))
 #define MG_STORE_BE16(p, n)           \
   do {                                \
     MG_U8P(p)[0] = ((n) >> 8U) & 255; \
@@ -1396,11 +1455,24 @@ void mg_delayms(unsigned int ms);
     MG_U8P(p)[2] = ((n) >> 8U) & 255;  \
     MG_U8P(p)[3] = (n) &255;           \
   } while (0)
+#define MG_STORE_BE64(p, n)            \
+  do {                                 \
+    MG_U8P(p)[0] = ((n) >> 56U) & 255; \
+    MG_U8P(p)[1] = ((n) >> 48U) & 255; \
+    MG_U8P(p)[2] = ((n) >> 40U) & 255; \
+    MG_U8P(p)[3] = ((n) >> 32U) & 255; \
+    MG_U8P(p)[4] = ((n) >> 24U) & 255; \
+    MG_U8P(p)[5] = ((n) >> 16U) & 255; \
+    MG_U8P(p)[6] = ((n) >> 8U) & 255;  \
+    MG_U8P(p)[7] = (n) &255;           \
+  } while (0)
 
 uint16_t mg_ntohs(uint16_t net);
 uint32_t mg_ntohl(uint32_t net);
+uint64_t mg_ntohll(uint64_t net);
 #define mg_htons(x) mg_ntohs(x)
 #define mg_htonl(x) mg_ntohl(x)
+#define mg_htonll(x) mg_ntohll(x)
 
 #define MG_REG(x) ((volatile uint32_t *) (x))[0]
 #define MG_BIT(x) (((uint32_t) 1U) << (x))
@@ -1484,8 +1556,8 @@ struct mg_iobuf {
   size_t align;        // Alignment during allocation
 };
 
-int mg_iobuf_init(struct mg_iobuf *, size_t, size_t);
+bool mg_iobuf_init(struct mg_iobuf *, size_t, size_t);
-int mg_iobuf_resize(struct mg_iobuf *, size_t);
+bool mg_iobuf_resize(struct mg_iobuf *, size_t);
 void mg_iobuf_free(struct mg_iobuf *);
 size_t mg_iobuf_add(struct mg_iobuf *, size_t, const void *, size_t);
 size_t mg_iobuf_del(struct mg_iobuf *, size_t ofs, size_t len);
@@ -1586,6 +1658,8 @@ enum {
   MG_EV_MQTT_OPEN,  // MQTT CONNACK received        int *connack_status_code
   MG_EV_SNTP_TIME,  // SNTP time received           uint64_t *epoch_millis
   MG_EV_WAKEUP,     // mg_wakeup() data received    struct mg_str *data
+  MG_EV_MDNS_REQ,   // mDNS request                 struct mg_mdns_req *
+  MG_EV_MDNS_RESP,  // mDNS response                struct mg_mdns_resp *
   MG_EV_USER        // Starting ID for user events
 };
 
@@ -1604,7 +1678,11 @@ struct mg_dns {
 };
 
 struct mg_addr {
-  uint8_t ip[16];    // Holds IPv4 or IPv6 address, in network byte order
+  union {  // Holds IPv4 or IPv6 address, in network byte order
+    uint8_t ip[16];
+    uint32_t ip4;
+    uint64_t ip6[2];
+  } addr;
   uint16_t port;     // TCP or UDP port in network byte order
   uint8_t scope_id;  // IPv6 scope ID
   bool is_ip6;       // True when address is IPv6 address
@@ -1698,6 +1776,7 @@ struct mg_timer *mg_timer_add(struct mg_mgr *mgr, uint64_t milliseconds,
 struct mg_connection *mg_connect_svc(struct mg_mgr *mgr, const char *url,
                                      mg_event_handler_t fn, void *fn_data,
                                      mg_event_handler_t pfn, void *pfn_data);
+void mg_multicast_restore(struct mg_connection *c, uint8_t *from);
 
 
 
@@ -1740,7 +1819,6 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *);
 int mg_http_get_request_len(const unsigned char *buf, size_t buf_len);
 void mg_http_printf_chunk(struct mg_connection *cnn, const char *fmt, ...);
 void mg_http_write_chunk(struct mg_connection *c, const char *buf, size_t len);
-void mg_http_delete_chunk(struct mg_connection *c, struct mg_http_message *hm);
 struct mg_connection *mg_http_listen(struct mg_mgr *, const char *url,
                                      mg_event_handler_t fn, void *fn_data);
 struct mg_connection *mg_http_connect(struct mg_mgr *, const char *url,
@@ -1803,6 +1881,7 @@ void mg_tls_handshake(struct mg_connection *);
 // Private
 void mg_tls_ctx_init(struct mg_mgr *);
 void mg_tls_ctx_free(struct mg_mgr *);
+#define MG_IS_DER(buf) (((uint8_t *) (buf))[0] == 0x30)  // DER begins with 0x30
 
 // Low-level IO primives used by TLS layer
 enum { MG_IO_ERR = -1, MG_IO_WAIT = -2, MG_IO_RESET = -3 };
@@ -1882,7 +1961,9 @@ int mg_aes_gcm_encrypt(unsigned char *output, const unsigned char *input,
 int mg_aes_gcm_decrypt(unsigned char *output, const unsigned char *input,
                        size_t input_length, const unsigned char *key,
                        const size_t key_len, const unsigned char *iv,
-                       const size_t iv_len);
+                       const size_t iv_len, unsigned char *aead,
+                       size_t aead_len, const unsigned char *tag,
+                       const size_t tag_len);
 
 #endif /* TLS_AES128_H */
 
@@ -2648,6 +2729,7 @@ PORTABLE_8439_DECL size_t mg_chacha20_poly1305_encrypt(
 PORTABLE_8439_DECL size_t mg_chacha20_poly1305_decrypt(
     uint8_t *restrict plain_text, const uint8_t key[RFC_8439_KEY_SIZE],
     const uint8_t nonce[RFC_8439_NONCE_SIZE],
+    const uint8_t *restrict ad, size_t ad_size,
     const uint8_t *restrict cipher_text, size_t cipher_text_size);
 #if defined(__cplusplus)
 }
@@ -2659,7 +2741,13 @@ PORTABLE_8439_DECL size_t mg_chacha20_poly1305_decrypt(
 
 
 int mg_rsa_mod_pow(const uint8_t *mod, size_t modsz, const uint8_t *exp, size_t expsz, const uint8_t *msg, size_t msgsz, uint8_t *out, size_t outsz);
-
+int mg_rsa_crt_sign(const uint8_t *em, size_t em_len,
+                    const uint8_t *dP, size_t dP_len,
+                    const uint8_t *dQ, size_t dQ_len,
+                    const uint8_t *p, size_t p_len,
+                    const uint8_t *q, size_t q_len,
+                    const uint8_t *qInv, size_t qInv_len,
+                    uint8_t *signature, size_t sig_len);
 #endif // TLS_RSA_H
 
 
@@ -2851,6 +2939,7 @@ struct mg_connection *mg_mqtt_listen(struct mg_mgr *mgr, const char *url,
 void mg_mqtt_login(struct mg_connection *c, const struct mg_mqtt_opts *opts);
 uint16_t mg_mqtt_pub(struct mg_connection *c, const struct mg_mqtt_opts *opts);
 void mg_mqtt_sub(struct mg_connection *, const struct mg_mqtt_opts *opts);
+void mg_mqtt_unsub(struct mg_connection *c, const struct mg_mqtt_opts *opts);
 int mg_mqtt_parse(const uint8_t *, size_t, uint8_t, struct mg_mqtt_message *);
 void mg_mqtt_send_header(struct mg_connection *, uint8_t cmd, uint8_t flags,
                          uint32_t len);
@@ -2864,6 +2953,12 @@ size_t mg_mqtt_next_prop(struct mg_mqtt_message *, struct mg_mqtt_prop *,
 
 
 
+#define MG_DNS_RTYPE_A 1
+#define MG_DNS_RTYPE_PTR 12
+#define MG_DNS_RTYPE_TXT 16
+#define MG_DNS_RTYPE_AAAA 28
+#define MG_DNS_RTYPE_SRV 33
+
 // Mongoose sends DNS queries that contain only one question:
 // either A (IPv4) or AAAA (IPv6) address lookup.
 // Therefore, we expect zero or one answer.
@@ -2892,13 +2987,42 @@ struct mg_dns_rr {
   uint16_t alen;    // Address length
 };
 
+// DNS-SD response record
+struct mg_dnssd_record {
+  struct mg_str srvcproto;  // service.proto, service name
+  struct mg_str txt;        // TXT record contents
+  uint16_t port;            // SRV record port
+};
+
+// mDNS request and response data structs passed to event handlers
+struct mg_mdns_req {
+  struct mg_dns_rr *rr;
+  struct mg_dnssd_record *r;
+  struct mg_str reqname;   // requested name in RR
+  struct mg_str respname;  // actual name to use in response
+  struct mg_addr *addr;    // actual address to use in response
+  bool is_listing;
+  bool is_resp;
+  bool is_unicast;
+};
+
+struct mg_mdns_resp {
+  struct mg_dns_rr *rr;
+  // TODO(scaprile )struct mg_str srvcproto; struct mg_str txt; uint16_t port; ?
+  struct mg_str name;
+  struct mg_addr addr;
+  // TODO(scaprile); bool has_A; bool has_PTR; bool has_SRV; bool has_TXT; ?
+};
+
 void mg_resolve(struct mg_connection *, const char *url);
 void mg_resolve_cancel(struct mg_connection *);
 bool mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *);
 size_t mg_dns_parse_rr(const uint8_t *buf, size_t len, size_t ofs,
                        bool is_question, struct mg_dns_rr *);
-                       
+
-struct mg_connection *mg_mdns_listen(struct mg_mgr *mgr, char *name);
+struct mg_connection *mg_mdns_listen(struct mg_mgr *mgr, mg_event_handler_t fn,
+                                     void *fn_data);
+bool mg_mdns_query(struct mg_connection *, const char *, unsigned int);
 
 
 
@@ -2975,8 +3099,8 @@ void mg_rpc_list(struct mg_rpc_req *r);
 #define MG_OTA_RT1060 302   // IMXRT1060
 #define MG_OTA_RT1064 303   // IMXRT1064
 #define MG_OTA_RT1170 304   // IMXRT1170
-#define MG_OTA_MCXN 310 	  // MCXN947
+#define MG_OTA_MCXN 310 	// MCXN947
-#define MG_OTA_FRDM 320    // FRDM-RW612
+#define MG_OTA_RW612 320    // FRDM-RW612
 #define MG_OTA_FLASH 900    // OTA via an internal flash
 #define MG_OTA_ESP32 910    // ESP32 OTA implementation
 #define MG_OTA_PICOSDK 920  // RP2040/2350 using Pico-SDK hardware_flash
@@ -3023,34 +3147,104 @@ bool mg_ota_flash_end(struct mg_flash *flash);
 
 
 
-struct mg_wifi_scan_bss_data {
+struct mg_wifi_data {
-    struct mg_str SSID;
+  char *ssid, *pass;      // STA mode, SSID to connect to
-    char *BSSID;
+  char *apssid, *appass;  // AP mode, our SSID
-    int16_t RSSI;
+  uint32_t apip, apmask;  // AP mode, our IP address and mask
-    uint8_t security;
+  uint8_t security;       // STA mode, TBD
-#define MG_WIFI_SECURITY_OPEN 0
+  uint8_t apsecurity;     // AP mode, TBD
-#define MG_WIFI_SECURITY_WEP  MG_BIT(0)
+  uint8_t apchannel;      // AP mode, channel to use
-#define MG_WIFI_SECURITY_WPA  MG_BIT(1)
+  bool apmode;  // start in AP mode; 'false' -> connect to 'ssid' != NULL
-#define MG_WIFI_SECURITY_WPA2 MG_BIT(2)
-#define MG_WIFI_SECURITY_WPA3 MG_BIT(3)
-    uint8_t channel;
-    unsigned band :2;
-#define MG_WIFI_BAND_2G 0
-#define MG_WIFI_BAND_5G 1
-    unsigned has_n :1;
 };
 
+struct mg_wifi_scan_bss_data {
+  struct mg_str SSID;
+  char *BSSID;
+  int16_t RSSI;
+  uint8_t security;
+#define MG_WIFI_SECURITY_OPEN 0
+#define MG_WIFI_SECURITY_WEP MG_BIT(0)
+#define MG_WIFI_SECURITY_WPA MG_BIT(1)
+#define MG_WIFI_SECURITY_WPA2 MG_BIT(2)
+#define MG_WIFI_SECURITY_WPA3 MG_BIT(3)
+#define MG_WIFI_SECURITY_WPA_ENTERPRISE MG_BIT(4)
+#define MG_WIFI_SECURITY_WPA2_ENTERPRISE MG_BIT(5)
+#define MG_WIFI_SECURITY_WPA3_ENTERPRISE MG_BIT(6)
+  uint8_t channel;
+  unsigned band : 2;
+#define MG_WIFI_BAND_2G 0
+#define MG_WIFI_BAND_5G 1
+  unsigned has_n : 1;
+  unsigned has_ac : 1;
+  unsigned has_ax : 1;
+};
 
 bool mg_wifi_scan(void);
-bool mg_wifi_connect(char *ssid, char *pass);
+bool mg_wifi_connect(struct mg_wifi_data *);
 bool mg_wifi_disconnect(void);
-bool mg_wifi_ap_start(char *ssid, char *pass, unsigned int channel);
+bool mg_wifi_ap_start(struct mg_wifi_data *);
 bool mg_wifi_ap_stop(void);
 
 
 
 
 
+#if MG_ENABLE_TCPIP
+
+// no config defaults to 0 => Ethernet
+enum mg_l2type { MG_TCPIP_L2_ETH = 0, MG_TCPIP_L2_PPP };  // MG_TCPIP_L2_PPPoE
+
+#if defined(__DCC__)
+#pragma pack(1)
+#else
+#pragma pack(push, 1)
+#endif
+
+struct mg_l2addr {
+  union {
+    uint8_t mac[6];
+  } addr;
+};
+
+#if defined(__DCC__)
+#pragma pack(0)
+#else
+#pragma pack(pop)
+#endif
+
+#if 0
+TODO(): ?
+struct eth_opts {
+  bool enable_crc32_check;         // Do a CRC check on RX frames and strip it
+  bool enable_mac_check;           // Do a MAC check on RX frames
+};
+struct mg_l2opts {
+  union {
+    struct eth_opts eth;
+  };
+};
+#endif
+
+enum mg_l2proto {
+  MG_TCPIP_L2PROTO_IPV4 = 0,
+  MG_TCPIP_L2PROTO_IPV6,
+  MG_TCPIP_L2PROTO_ARP,
+  MG_TCPIP_L2PROTO_PPPoE_DISC,
+  MG_TCPIP_L2PROTO_PPPoE_SESS
+};
+enum mg_l2addrtype {
+  MG_TCPIP_L2ADDR_BCAST,
+  MG_TCPIP_L2ADDR_MCAST,
+  MG_TCPIP_L2ADDR_MCAST6
+};
+
+#endif
+
+
+
+
+
+
 
 
 #if MG_ENABLE_TCPIP
@@ -3068,45 +3262,58 @@ typedef void (*mg_tcpip_event_handler_t)(struct mg_tcpip_if *ifp, int ev,
                                          void *ev_data);
 
 enum {
-  MG_TCPIP_EV_ST_CHG,           // state change                   uint8_t * (&ifp->state)
+  MG_TCPIP_EV_ST_CHG,  // state change                   uint8_t * (&ifp->state)
-  MG_TCPIP_EV_DHCP_DNS,         // DHCP DNS assignment            uint32_t *ipaddr
+  MG_TCPIP_EV_DHCP_DNS,   // DHCP DNS assignment            uint32_t *ipaddr
-  MG_TCPIP_EV_DHCP_SNTP,        // DHCP SNTP assignment           uint32_t *ipaddr
+  MG_TCPIP_EV_DHCP_SNTP,  // DHCP SNTP assignment           uint32_t *ipaddr
-  MG_TCPIP_EV_ARP,              // Got ARP packet                 struct mg_str *
+  MG_TCPIP_EV_ARP,        // Got ARP packet                 struct mg_str *
-  MG_TCPIP_EV_TIMER_1S,         // 1 second timer                 NULL
+  MG_TCPIP_EV_TIMER_1S,   // 1 second timer                 NULL
-  MG_TCPIP_EV_WIFI_SCAN_RESULT, // Wi-Fi scan results             struct mg_wifi_scan_bss_data *
+  MG_TCPIP_EV_WIFI_SCAN_RESULT,  // Wi-Fi scan results             struct
-  MG_TCPIP_EV_WIFI_SCAN_END,    // Wi-Fi scan has finished        NULL
+                                 // mg_wifi_scan_bss_data *
-  MG_TCPIP_EV_WIFI_CONNECT_ERR, // Wi-Fi connect has failed       driver and chip specific
+  MG_TCPIP_EV_WIFI_SCAN_END,     // Wi-Fi scan has finished        NULL
-  MG_TCPIP_EV_DRIVER,           // Driver event                   driver specific
+  MG_TCPIP_EV_WIFI_CONNECT_ERR,  // Wi-Fi connect has failed       driver and
-  MG_TCPIP_EV_USER              // Starting ID for user events
+                                 // chip specific
+  MG_TCPIP_EV_DRIVER,   // Driver event                   driver specific
+  MG_TCPIP_EV_ST6_CHG,  // state6 change                  uint8_t *
+                        // (&ifp->state6)
+  MG_TCPIP_EV_USER      // Starting ID for user events
 };
 
-
 // Network interface
 struct mg_tcpip_if {
-  uint8_t mac[6];                  // MAC address. Must be set to a valid MAC
+  uint8_t mac[sizeof(struct mg_l2addr)];  // hw address. Set to a valid addr
-  uint32_t ip, mask, gw;           // IP address, mask, default gateway
+  uint32_t ip, mask, gw;                  // IP address, mask, default gateway
-  struct mg_str tx;                // Output (TX) buffer
+  struct mg_str tx;                       // Output (TX) buffer
-  bool enable_dhcp_client;         // Enable DCHP client
+  bool enable_dhcp_client;                // Enable DCHP client
-  bool enable_dhcp_server;         // Enable DCHP server
+  bool enable_dhcp_server;                // Enable DCHP server
-  bool enable_get_gateway;         // DCHP server sets client as gateway
+  bool enable_get_gateway;                // DCHP server sets client as gateway
-  bool enable_req_dns;             // DCHP client requests DNS server
+  bool enable_req_dns;                    // DCHP client requests DNS server
-  bool enable_req_sntp;            // DCHP client requests SNTP server
+  bool enable_req_sntp;                   // DCHP client requests SNTP server
   bool enable_crc32_check;         // Do a CRC check on RX frames and strip it
   bool enable_mac_check;           // Do a MAC check on RX frames
   bool update_mac_hash_table;      // Signal drivers to update MAC controller
   struct mg_tcpip_driver *driver;  // Low level driver
   void *driver_data;               // Driver-specific data
+  mg_tcpip_event_handler_t pfn;    // Driver-specific event handler function
   mg_tcpip_event_handler_t fn;     // User-specified event handler function
   struct mg_mgr *mgr;              // Mongoose event manager
   struct mg_queue recv_queue;      // Receive queue
-  char dhcp_name[12];              // Name reported to DHCP, "mip" if unset
+  char dhcp_name[MG_TCPIP_DHCPNAME_SIZE];  // Name for DHCP, "mip" if unset
-  uint16_t mtu;                    // Interface MTU
+  uint16_t mtu;                            // Interface link payload
-#define MG_TCPIP_MTU_DEFAULT 1500
+  uint16_t framesize;                      // Interface frame max length
+#if MG_ENABLE_IPV6
+  uint64_t ip6ll[2], ip6[2];  // IPv6 link-local and global addresses,
+  uint8_t prefix[8];          // prefix,
+  uint8_t prefix_len;         // prefix length,
+  uint64_t gw6[2];            // default gateway.
+  bool enable_slaac;          // Enable IPv6 address autoconfiguration
+  bool enable_dhcp6_client;   // Enable DCHPv6 client TODO()
+#endif
 
   // Internal state, user can use it but should not change it
-  uint8_t gwmac[6];             // Router's MAC
+  uint8_t gwmac[sizeof(struct mg_l2addr)];  // Router's hw address
-  char *dns4_url;               // DNS server URL
+  enum mg_l2type l2type;                    // Ethernet, PPP, etc.
-  uint64_t now;                 // Current time
+  char *dns4_url;                           // DNS server URL
+  uint64_t now;                             // Current time
   uint64_t timer_1000ms;        // 1000 ms timer: for DHCP and link state
   uint64_t lease_expire;        // Lease expiration time, in ms
   uint16_t eport;               // Next ephemeral port
@@ -3114,12 +3321,18 @@ struct mg_tcpip_if {
   volatile uint32_t nrecv;      // Number of received frames
   volatile uint32_t nsent;      // Number of transmitted frames
   volatile uint32_t nerr;       // Number of driver errors
-  uint8_t state;                // Current state
+  uint8_t state;                // Current link and IPv4 state
 #define MG_TCPIP_STATE_DOWN 0   // Interface is down
 #define MG_TCPIP_STATE_UP 1     // Interface is up
 #define MG_TCPIP_STATE_REQ 2    // Interface is up, DHCP REQUESTING state
 #define MG_TCPIP_STATE_IP 3     // Interface is up and has an IP assigned
 #define MG_TCPIP_STATE_READY 4  // Interface has fully come up, ready to work
+  bool gw_ready;                // We've got a hw address for the router
+#if MG_ENABLE_IPV6
+  uint8_t gw6mac[sizeof(struct mg_l2addr)];  // IPV6 Router's hw address
+  uint8_t state6;                            // Current IPv6 state
+  bool gw6_ready;  // We've got a hw address for the IPv6 router
+#endif
 };
 
 void mg_tcpip_init(struct mg_mgr *, struct mg_tcpip_if *);
@@ -3143,6 +3356,8 @@ extern struct mg_tcpip_driver mg_tcpip_driver_ppp;
 extern struct mg_tcpip_driver mg_tcpip_driver_pico_w;
 extern struct mg_tcpip_driver mg_tcpip_driver_rw612;
 extern struct mg_tcpip_driver mg_tcpip_driver_cyw;
+extern struct mg_tcpip_driver mg_tcpip_driver_nxp_wifi;
+extern struct mg_tcpip_driver mg_tcpip_driver_st67w6;
 
 // Drivers that require SPI, can use this SPI abstraction
 struct mg_tcpip_spi {
@@ -3152,6 +3367,42 @@ struct mg_tcpip_spi {
   uint8_t (*txn)(void *, uint8_t);  // SPI transaction: write 1 byte, read reply
 };
 
+// Alignment and memory section requirements
+#ifndef MG_8BYTE_ALIGNED
+#if defined(__GNUC__)
+#define MG_8BYTE_ALIGNED __attribute__((aligned((8U))))
+#else
+#define MG_8BYTE_ALIGNED
+#endif  // compiler
+#endif  // 8BYTE_ALIGNED
+
+#ifndef MG_16BYTE_ALIGNED
+#if defined(__GNUC__)
+#define MG_16BYTE_ALIGNED __attribute__((aligned((16U))))
+#else
+#define MG_16BYTE_ALIGNED
+#endif  // compiler
+#endif  // 16BYTE_ALIGNED
+
+#ifndef MG_32BYTE_ALIGNED
+#if defined(__GNUC__)
+#define MG_32BYTE_ALIGNED __attribute__((aligned((32U))))
+#else
+#define MG_32BYTE_ALIGNED
+#endif  // compiler
+#endif  // 32BYTE_ALIGNED
+
+#ifndef MG_64BYTE_ALIGNED
+#if defined(__GNUC__)
+#define MG_64BYTE_ALIGNED __attribute__((aligned((64U))))
+#else
+#define MG_64BYTE_ALIGNED
+#endif  // compiler
+#endif  // 64BYTE_ALIGNED
+
+#ifndef MG_ETH_RAM
+#define MG_ETH_RAM
+#endif
 
 #endif
 
@@ -3186,43 +3437,35 @@ struct mg_tcpip_driver_cyw_firmware {
 };
 
 struct mg_tcpip_driver_cyw_data {
+  struct mg_wifi_data wifi;
   void *bus;
   struct mg_tcpip_driver_cyw_firmware *fw;
-  char *ssid;
+  bool hs;  // use chip "high-speed" mode; otherwise SPI CPOL0 CPHA0 (DS 4.2.3 Table 6)
-  char *pass;
-  char *apssid;
-  char *appass;
-  uint8_t security; // TBD
-  uint8_t apsecurity; // TBD
-  uint8_t apchannel;
-  bool apmode;      // start in AP mode; 'false' starts connection to 'ssid' if not NULL
-  bool hs;          // use chip "high-speed" mode; otherwise SPI CPOL0 CPHA0 (DS 4.2.3 Table 6)
 };
 
-#if 0
+#define MG_TCPIP_DRIVER_INIT(mgr)                              \
-#define MG_TCPIP_DRIVER_INIT(mgr)                                 \
+  do {                                                         \
-  do {                                                            \
+    static struct mg_tcpip_driver_cyw_data driver_data_;       \
-    static struct mg_tcpip_driver_cyw_data driver_data_;          \
+    static struct mg_tcpip_if mif_;                            \
-    static struct mg_tcpip_if mif_;                               \
+    MG_SET_WIFI_CONFIG(&driver_data_);                         \
-    MG_SET_WIFI_CONFIG(&driver_data_);                            \
+    mif_.ip = MG_TCPIP_IP;                                     \
-    mif_.ip = MG_TCPIP_IP;                                        \
+    mif_.mask = MG_TCPIP_MASK;                                 \
-    mif_.mask = MG_TCPIP_MASK;                                    \
+    mif_.gw = MG_TCPIP_GW;                                     \
-    mif_.gw = MG_TCPIP_GW;                                        \
+    mif_.driver = &mg_tcpip_driver_cyw;                        \
-    mif_.driver = &mg_tcpip_driver_pico_w;                        \
+    mif_.driver_data = &driver_data_;                          \
-    mif_.driver_data = &driver_data_;                             \
+    mif_.recv_queue.size = 8192;                               \
-    mif_.recv_queue.size = 8192;                                  \
+    mif_.mac[0] = 2; /* MAC read from OTP at driver init */    \
-    mif_.mac[0] = 2; /* MAC read from OTP at driver init */       \
+    mg_tcpip_init(mgr, &mif_);                                 \
-    mg_tcpip_init(mgr, &mif_);                                    \
     MG_INFO(("Driver: cyw, MAC: %M", mg_print_mac, mif_.mac)); \
   } while (0)
-#endif
 
 #endif
 
 
 #if MG_ENABLE_TCPIP && \
   (defined(MG_ENABLE_DRIVER_IMXRT10) && MG_ENABLE_DRIVER_IMXRT10) || \
-  (defined(MG_ENABLE_DRIVER_IMXRT11) && MG_ENABLE_DRIVER_IMXRT11)
+  (defined(MG_ENABLE_DRIVER_IMXRT11) && MG_ENABLE_DRIVER_IMXRT11) || \
+  (defined(MG_ENABLE_DRIVER_MCXE) && MG_ENABLE_DRIVER_MCXE)
 
 struct mg_tcpip_driver_imxrt_data {
   // MDC clock divider. MDC clock is derived from IPS Bus clock (ipg_clk),
@@ -3268,6 +3511,34 @@ struct mg_tcpip_driver_imxrt_data {
 #endif
 
 
+#if MG_ENABLE_TCPIP  && \
+    defined(MG_ENABLE_DRIVER_NXP_WIFI) && MG_ENABLE_DRIVER_NXP_WIFI
+
+
+struct mg_tcpip_driver_nxp_wifi_data {
+  struct mg_wifi_data wifi;
+};
+
+
+#define MG_TCPIP_DRIVER_INIT(mgr)                                   \
+  do {                                                              \
+    static struct mg_tcpip_driver_nxp_wifi_data driver_data_;       \
+    static struct mg_tcpip_if mif_;                                 \
+    MG_SET_WIFI_CONFIG(&driver_data_);                              \
+    mif_.ip = MG_TCPIP_IP;                                          \
+    mif_.mask = MG_TCPIP_MASK;                                      \
+    mif_.gw = MG_TCPIP_GW;                                          \
+    mif_.driver = &mg_tcpip_driver_nxp_wifi;                        \
+    mif_.driver_data = &driver_data_;                               \
+    mif_.recv_queue.size = 8192;                                    \
+    mif_.mac[0] = 2; /* MAC read from OTP at driver init */         \
+    mg_tcpip_init(mgr, &mif_);                                      \
+    MG_INFO(("Driver: nxp wifi, MAC: %M", mg_print_mac, mif_.mac)); \
+  } while (0)
+
+#endif
+
+
 
 
 struct mg_phy {
@@ -3298,14 +3569,7 @@ bool mg_phy_up(struct mg_phy *, uint8_t addr, bool *full_duplex,
 #include "pico/unique_id.h"     // keep this include
 
 struct mg_tcpip_driver_pico_w_data {
-  char *ssid;
+  struct mg_wifi_data wifi;
-  char *pass;
-  char *apssid;
-  char *appass;
-  uint8_t security; // TBD
-  uint8_t apsecurity; // TBD
-  uint8_t apchannel;
-  bool apmode;      // start in AP mode; 'false' starts connection to 'ssid' if not NULL
 };
 
 #define MG_TCPIP_DRIVER_INIT(mgr)                                 \
@@ -3501,6 +3765,43 @@ bool mg_sdio_transfer(struct mg_tcpip_sdio *sdio, bool write, unsigned int f,
 #endif
 
 
+#if MG_ENABLE_TCPIP && defined(MG_ENABLE_DRIVER_ST67W6) && \
+    MG_ENABLE_DRIVER_ST67W6
+
+struct mg_tcpip_spi_ {
+  void *spi;              // Opaque SPI bus descriptor
+  void (*begin)(void *);  // SPI begin: slave select low
+  void (*end)(void *);    // SPI end: slave select high
+  void (*txn)(void *, uint8_t *, uint8_t *,
+              size_t len);  // SPI transaction: write-read len bytes
+};
+
+struct mg_tcpip_driver_st67w6_data {
+  struct mg_wifi_data wifi;
+  void *spi;
+  bool (*is_ready)(void);     // return state of module RDY pin
+  struct mg_queue send_queue; // decouple tx calls from module polls
+};
+
+#define MG_TCPIP_DRIVER_INIT(mgr)                                 \
+  do {                                                            \
+    static struct mg_tcpip_driver_st67w6_data driver_data_;       \
+    static struct mg_tcpip_if mif_;                               \
+    MG_SET_WIFI_CONFIG(&driver_data_);                            \
+    mif_.ip = MG_TCPIP_IP;                                        \
+    mif_.mask = MG_TCPIP_MASK;                                    \
+    mif_.gw = MG_TCPIP_GW;                                        \
+    mif_.driver = &mg_tcpip_driver_st67w6;                        \
+    mif_.driver_data = &driver_data_;                             \
+    mif_.recv_queue.size = 8192;                                  \
+    mif_.mac[0] = 2; /* MAC read from OTP at driver init */       \
+    mg_tcpip_init(mgr, &mif_);                                    \
+    MG_INFO(("Driver: st67w6, MAC: %M", mg_print_mac, mif_.mac)); \
+  } while (0)
+
+#endif
+
+
 #if MG_ENABLE_TCPIP && defined(MG_ENABLE_DRIVER_STM32F) && \
     MG_ENABLE_DRIVER_STM32F
 
@@ -3562,7 +3863,10 @@ struct mg_tcpip_driver_stm32f_data {
 #if !defined(MG_ENABLE_DRIVER_MCXN)
 #define MG_ENABLE_DRIVER_MCXN 0
 #endif
-#if MG_ENABLE_DRIVER_STM32H || MG_ENABLE_DRIVER_MCXN
+#if !defined(MG_ENABLE_DRIVER_STM32N)
+#define MG_ENABLE_DRIVER_STM32N 0
+#endif
+#if MG_ENABLE_DRIVER_STM32H || MG_ENABLE_DRIVER_MCXN || MG_ENABLE_DRIVER_STM32N
 
 struct mg_tcpip_driver_stm32h_data {
   // MDC clock divider. MDC clock is derived from HCLK, must not exceed 2.5MHz
@@ -3601,6 +3905,18 @@ struct mg_tcpip_driver_stm32h_data {
 #define MG_ENABLE_ETH_IRQ()
 #endif
 
+#if MG_ENABLE_IPV6
+#define MG_IPV6_INIT(mif)                                         \
+  do {                                                            \
+    memcpy(mif.ip6ll, (uint8_t[16]) MG_TCPIP_IPV6_LINKLOCAL, 16);     \
+    memcpy(mif.ip6, (uint8_t[16]) MG_TCPIP_GLOBAL, 16);           \
+    memcpy(mif.gw6, (uint8_t[16]) MG_TCPIP_GW6, 16);              \
+    mif.prefix_len = MG_TCPIP_PREFIX_LEN;                        \
+  } while(0)
+#else
+#define MG_IPV6_INIT(mif)
+#endif
+
 #define MG_TCPIP_DRIVER_INIT(mgr)                                 \
   do {                                                            \
     static struct mg_tcpip_driver_stm32h_data driver_data_;       \
@@ -3614,6 +3930,7 @@ struct mg_tcpip_driver_stm32h_data {
     mif_.driver = &mg_tcpip_driver_stm32h;                        \
     mif_.driver_data = &driver_data_;                             \
     MG_SET_MAC_ADDRESS(mif_.mac);                                 \
+    MG_IPV6_INIT(mif_);                                           \
     mg_tcpip_init(mgr, &mif_);                                    \
     MG_ENABLE_ETH_IRQ();                                          \
     MG_INFO(("Driver: stm32h, MAC: %M", mg_print_mac, mif_.mac)); \

src/arch_cube.h

@@ -35,11 +35,14 @@
 #define MG_ENABLE_TCPIP 1  // Enable built-in TCP/IP stack
 #endif
 
-#if MG_ENABLE_TCPIP && !defined(MG_ENABLE_DRIVER_STM32F) && !defined(MG_ENABLE_DRIVER_STM32H)
+#if MG_ENABLE_TCPIP && !defined(MG_ENABLE_DRIVER_STM32F) && \
+    !defined(MG_ENABLE_DRIVER_STM32H) && !defined(MG_ENABLE_DRIVER_STM32N)
 #if defined(STM32F1) || defined(STM32F2) || defined(STM32F4) || defined(STM32F7)
 #define MG_ENABLE_DRIVER_STM32F 1
 #elif defined(STM32H5) || defined(STM32H7)
 #define MG_ENABLE_DRIVER_STM32H 1
+#elif defined(STM32N6)
+#define MG_ENABLE_DRIVER_STM32N 1
 #else
 #error Select a driver in mongoose_config.h
 #endif
@@ -49,7 +52,8 @@
 #define MG_TLS MG_TLS_BUILTIN
 #endif
 
-#if !defined(MG_OTA) && defined(STM32F1) || defined(STM32F2) || defined(STM32F4) || defined(STM32F7)
+#if !defined(MG_OTA) && defined(STM32F1) || defined(STM32F2) || \
+    defined(STM32F4) || defined(STM32F7)
 #define MG_OTA MG_OTA_STM32F
 #elif !defined(MG_OTA) && defined(STM32H5)
 #define MG_OTA MG_OTA_STM32H5

src/arch_freertos.h

@@ -17,6 +17,7 @@
 #define mode_t size_t
 #include <alloca.h>
 #include <time.h>
+#define strdup(s) ((char *) mg_strdup(mg_str(s)).buf)
 #elif defined(__CCRH__)
 #else
 #include <sys/stat.h>

src/arch_win32.h

@@ -110,7 +110,10 @@ typedef enum { false = 0, true = 1 } bool;
 #endif
 #endif
 
-typedef unsigned long nfds_t;
+#if defined(MG_ENABLE_POLL) && MG_ENABLE_POLL && (!defined(MG_ENABLE_LWIP) || !MG_ENABLE_LWIP)
+typedef unsigned long nfds_t; // see #3388
+#endif
+
 #if defined(_MSC_VER)
 #if MG_ENABLE_WINSOCK
 #pragma comment(lib, "ws2_32.lib")

src/arch_zephyr.h

@@ -3,13 +3,15 @@
 #if MG_ARCH == MG_ARCH_ZEPHYR
 
 #include <zephyr/kernel.h>
+#include <zephyr/net/socket.h>
+// #include <zephyr/posix/dirent.h>
+#include <zephyr/posix/fcntl.h>
+#include <zephyr/posix/sys/select.h>
+#include <zephyr/random/random.h>
 #include <zephyr/version.h>
 
 #include <ctype.h>
 #include <errno.h>
-#include <zephyr/net/socket.h>
-#include <zephyr/posix/fcntl.h>
-#include <zephyr/posix/sys/select.h>
 #include <stdarg.h>
 #include <stdbool.h>
 #include <stdint.h>

src/config.h

@@ -175,10 +175,34 @@
 #define MG_TCPIP_GW MG_IPV4(0, 0, 0, 0)  // Default is 0.0.0.0 (DHCP)
 #endif
 
+#if MG_ENABLE_IPV6
+
+#ifndef MG_TCPIP_GLOBAL
+#define MG_TCPIP_GLOBAL MG_IPV6(0, 0, 0, 0, 0, 0, 0, 0)
+#endif
+
+#ifndef MG_TCPIP_IPV6_LINKLOCAL
+#define MG_TCPIP_IPV6_LINKLOCAL MG_IPV6(0, 0, 0, 0, 0, 0, 0, 0)
+#endif
+
+#ifndef MG_TCPIP_PREFIX_LEN
+#define MG_TCPIP_PREFIX_LEN 0
+#endif
+
+#ifndef MG_TCPIP_GW6
+#define MG_TCPIP_GW6 MG_IPV6(0, 0, 0, 0, 0, 0, 0, 0)
+#endif
+
+#endif
+
 #ifndef MG_SET_MAC_ADDRESS
 #define MG_SET_MAC_ADDRESS(mac)
 #endif
 
+#ifndef MG_TCPIP_DHCPNAME_SIZE
+#define MG_TCPIP_DHCPNAME_SIZE 18  // struct mg_tcpip_if :: dhcp_name size
+#endif
+
 #ifndef MG_SET_WIFI_CONFIG
 #define MG_SET_WIFI_CONFIG(data)
 #endif

src/dns.c

@@ -63,7 +63,7 @@ static size_t mg_dns_parse_name_depth(const uint8_t *s, size_t len, size_t ofs,
     if (j < tolen) to[j] = '\0';  // Zero-terminate this chunk
     // MG_INFO(("--> [%s]", to));
   }
-  if (tolen > 0) to[tolen - 1] = '\0';  // Make sure make sure it is nul-term
+  if (tolen > 0) to[tolen - 1] = '\0';  // Make sure it is nul-term
   return i;
 }
 
@@ -134,14 +134,15 @@ bool mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *dm) {
     mg_dns_parse_name(buf, len, ofs, dm->name, sizeof(dm->name));
     ofs += n;
 
-    if (rr.alen == 4 && rr.atype == 1 && rr.aclass == 1) {
+    if (rr.alen == 4 && rr.atype == MG_DNS_RTYPE_A && rr.aclass == 1) {
       dm->addr.is_ip6 = false;
-      memcpy(&dm->addr.ip, &buf[ofs - 4], 4);
+      memcpy(&dm->addr.addr.ip, &buf[ofs - 4], 4);
       dm->resolved = true;
       break;  // Return success
-    } else if (rr.alen == 16 && rr.atype == 28 && rr.aclass == 1) {
+    } else if (rr.alen == 16 && rr.atype == MG_DNS_RTYPE_AAAA &&
+               rr.aclass == 1) {
       dm->addr.is_ip6 = true;
-      memcpy(&dm->addr.ip, &buf[ofs - 16], 16);
+      memcpy(&dm->addr.addr.ip, &buf[ofs - 16], 16);
       dm->resolved = true;
       break;  // Return success
     }
@@ -255,8 +256,12 @@ static void mg_sendnsreq(struct mg_connection *c, struct mg_str *name, int ms,
     mg_error(c, "resolve OOM");
   } else {
     struct dns_data *reqs = (struct dns_data *) c->mgr->active_dns_requests;
-    d->txnid = reqs ? (uint16_t) (reqs->txnid + 1) : 1;
+    uint16_t id;
-    d->next = (struct dns_data *) c->mgr->active_dns_requests;
+    mg_random(&id, sizeof(uint16_t));
+    // TODO(): traverse reqs and check id != reqs->txnid; repeat otherwise
+    if (reqs != NULL) id = (uint16_t) (reqs->txnid + 1);  // no collision
+    d->txnid = id;
+    d->next = reqs;
     c->mgr->active_dns_requests = d;
     d->expire = mg_millis() + (uint64_t) ms;
     d->c = c;
@@ -282,6 +287,7 @@ void mg_resolve(struct mg_connection *c, const char *url) {
   }
 }
 
+// Response header length is 10 bytes
 static const uint8_t mdns_answer[] = {
     0, 1,          // 2 bytes - record type, A
     0, 1,          // 2 bytes - address class, INET
@@ -289,65 +295,334 @@ static const uint8_t mdns_answer[] = {
     0, 4           // 2 bytes - address length
 };
 
+// A name length is name->len + '.local' + 2 = name->len + 8
+static uint8_t *build_name(struct mg_str *name, uint8_t *p) {
+  *p++ = (uint8_t) name->len;  // label 1
+  memcpy(p, name->buf, name->len), p += name->len;
+  *p++ = 5;  // label 2
+  memcpy(p, "local", 5), p += 5;
+  *p++ = 0;  // no more labels
+  return p;
+}
+
+void mg_getlocaddr(struct mg_connection *, struct mg_addr *, struct mg_addr *);
+
+// An A record length is 10 + 4 = 14 bytes
+static uint8_t *build_a_record(struct mg_connection *c, uint8_t *p,
+                               struct mg_addr *addr) {
+  memcpy(p, mdns_answer, sizeof(mdns_answer)), p += sizeof(mdns_answer);
+  if (addr != NULL && !addr->is_ip6) {
+    memcpy(p, &addr->addr.ip4, 4), p += 4;
+  } else {
+#if MG_ENABLE_TCPIP
+    memcpy(p, &c->mgr->ifp->ip, 4), p += 4;
+#else
+    struct mg_addr loc, to;
+    memset(&loc, 0, sizeof(loc));
+    to.is_ip6 = false;
+    to.port = mg_htons(5353);
+    to.addr.ip4 = MG_IPV4(224, 0, 0, 51);
+    mg_getlocaddr(c, &to, &loc);
+    memcpy(p, &loc.addr.ip4, 4), p += 4;
+#endif
+  }
+  return p;
+}
+
+// A srv name length is r->srvcproto.len + '.local' + 2 = r->srvcproto.len + 8
+static uint8_t *build_srv_name(uint8_t *p, struct mg_dnssd_record *r) {
+  *p++ = (uint8_t) r->srvcproto.len - 5;  // label 1, up to '._tcp'
+  memcpy(p, r->srvcproto.buf, r->srvcproto.len), p += r->srvcproto.len;
+  p[-5] = 4;  // label 2, '_tcp', overwrite '.'
+  *p++ = 5;   // label 3
+  memcpy(p, "local", 5), p += 5;
+  *p++ = 0;  // no more labels
+  return p;
+}
+
+#if 0
+// TODO(): for listing
+static uint8_t *build_mysrv_name(struct mg_str *name, uint8_t *p,
+                                 struct mg_dnssd_record *r) {
+  *p++ = name->len;  // label 1
+  memcpy(p, name->buf, name->len), p += name->len;
+  return build_srv_name(p, r);
+}
+#endif
+
+// A PTR record length is 10 + name->len + 3 = name->len + 13
+static uint8_t *build_ptr_record(struct mg_str *name, uint8_t *p, uint16_t o) {
+  uint16_t offset = mg_htons(o);
+  memcpy(p, mdns_answer, sizeof(mdns_answer));
+  p[1] = MG_DNS_RTYPE_PTR;  // overwrite record type
+  p += sizeof(mdns_answer);
+  p[-1] = (uint8_t) name->len +
+          3;  // overwrite response length, label length + label + offset
+  *p++ = (uint8_t) name->len;                       // response: label 1
+  memcpy(p, name->buf, name->len), p += name->len;  // copy label
+  memcpy(p, &offset, 2);
+  *p |= 0xC0, p += 2;
+  return p;
+}
+
+// An SRV record length is 10 + name->len + 9 = name->len + 19
+static uint8_t *build_srv_record(struct mg_str *name, uint8_t *p,
+                                 struct mg_dnssd_record *r, uint16_t o) {
+  uint16_t port = mg_htons(r->port);
+  uint16_t offset = mg_htons(o);
+  memcpy(p, mdns_answer, sizeof(mdns_answer));
+  p[1] = MG_DNS_RTYPE_SRV;  // overwrite record type
+  p += sizeof(mdns_answer);
+  p[-1] = (uint8_t) name->len + 9;  // overwrite response length (4+2+1+2)
+  *p++ = 0;                         // priority
+  *p++ = 0;
+  *p++ = 0;  // weight
+  *p++ = 0;
+  memcpy(p, &port, 2), p += 2;  // port
+  *p++ = (uint8_t) name->len;   // label 1
+  memcpy(p, name->buf, name->len), p += name->len;
+  memcpy(p, &offset, 2);
+  *p |= 0xC0, p += 2;
+  return p;
+}
+
+// A TXT record length is r->txt.len (txt contents) + 10
+static uint8_t *build_txt_record(uint8_t *p, struct mg_dnssd_record *r) {
+  uint16_t len = mg_htons((uint16_t) r->txt.len);
+  memcpy(p, mdns_answer, sizeof(mdns_answer));
+  p[1] = MG_DNS_RTYPE_TXT;  // overwrite record type
+  p += sizeof(mdns_answer);
+  memcpy(p - 2, &len, 2);  // overwrite response length
+  memcpy(p, r->txt.buf, r->txt.len), p += r->txt.len;  // copy record verbatim
+  return p;
+}
+
+// Each additional record has a 2-byte field pointing to the name label
+
+// RFC-6762 16: case-insensitivity --> RFC-1034, 1035
+
+static void handle_mdns_query(struct mg_connection *c) {
+  struct mg_dns_header *qh = (struct mg_dns_header *) c->recv.buf;
+  struct mg_dns_rr rr;
+  size_t n;
+  // Parse first question, offset 12 is header size
+  n = mg_dns_parse_rr(c->recv.buf, c->recv.len, 12, true, &rr);
+  MG_VERBOSE(("mDNS request parsed, result=%d", (int) n));
+  if (n > 0) {
+    // RFC-6762 Appendix C, RFC2181 11: m(n + 1-63), max 255 + 0x0
+    uint8_t buf[sizeof(struct mg_dns_header) + 256 + sizeof(mdns_answer) + 4];
+    struct mg_dns_header *h = (struct mg_dns_header *) buf;
+    uint8_t *p = &buf[sizeof(*h)];
+    char name[256];
+    uint8_t name_len;
+    // uint16_t q = mg_ntohs(qh->num_questions);
+    struct mg_str defname = mg_str((const char *) c->fn_data);
+    struct mg_str *respname;
+    struct mg_mdns_req req;
+    memset(&req, 0, sizeof(req));
+    req.is_unicast = (rr.aclass & MG_BIT(15)) != 0;  // QU
+    rr.aclass &= (uint16_t) ~MG_BIT(15);  // remove "QU" (unicast response)
+    qh->num_questions = mg_htons(1);      // parser sanity
+    mg_dns_parse_name(c->recv.buf, c->recv.len, 12, name, sizeof(name));
+    name_len = (uint8_t) strlen(name);  // verify it ends in .local
+    if (name_len <= 6 || strcmp(".local", &name[name_len - 6]) != 0 ||
+        (rr.aclass != 1 && rr.aclass != 0xff))
+      return;
+    name[name_len -= 6] = '\0';  // remove .local
+    MG_VERBOSE(("RR %u %u %s", (unsigned int) rr.atype,
+                (unsigned int) rr.aclass, name));
+    if (rr.atype == MG_DNS_RTYPE_A) {
+      // TODO(): ensure c->fn_data ends in \0
+      // if we have a name to match, go; otherwise users will match and fill
+      // req.r.name and set req.is_resp
+      if (c->fn_data != NULL && mg_casecmp((char *) c->fn_data, name) != 0)
+        return;
+      req.is_resp = (c->fn_data != NULL);
+      req.reqname = mg_str_n(name, name_len);
+    } else  // users have to match the request to something in their db, then
+            // fill req.r and set req.is_resp
+      if (rr.atype == MG_DNS_RTYPE_PTR) {
+        if (strcmp("_services._dns-sd._udp", name) == 0) req.is_listing = true;
+        MG_DEBUG(
+            ("PTR request for %s", req.is_listing ? "services listing" : name));
+        req.reqname = mg_str_n(name, name_len);
+      } else if (rr.atype == MG_DNS_RTYPE_SRV || rr.atype == MG_DNS_RTYPE_TXT) {
+        MG_DEBUG(("%s request for %s",
+                  rr.atype == MG_DNS_RTYPE_SRV ? "SRV" : "TXT", name));
+        // if possible, check it starts with our name, users will check it ends
+        // in a service name they handle
+        if (c->fn_data != NULL) {
+          if (mg_strcasecmp(defname, mg_str_n(name, defname.len)) != 0 ||
+              name[defname.len] != '.')
+            return;
+          req.reqname =
+              mg_str_n(name + defname.len + 1, name_len - defname.len - 1);
+          MG_DEBUG(
+              ("That's us, handing %.*s", req.reqname.len, req.reqname.buf));
+        } else {
+          req.reqname = mg_str_n(name, name_len);
+        }
+      } else {  // unhandled record
+        return;
+      }
+    req.rr = &rr;
+    mg_call(c, MG_EV_MDNS_REQ, &req);
+    if (!req.is_resp) return;
+    respname = req.respname.buf != NULL ? &req.respname : &defname;
+
+    memset(h, 0, sizeof(*h));                   // clear header
+    h->txnid = req.is_unicast ? qh->txnid : 0;  // RFC-6762 18.1
+    h->num_answers = mg_htons(1);  // RFC-6762 6: 0 questions, 1 Answer
+    h->flags = mg_htons(0x8400);   // Authoritative response
+    if (req.is_listing) {
+      // TODO(): RFC-6762 6: each responder SHOULD delay its response by a
+      // random amount of time selected with uniform random distribution in the
+      // range 20-120 ms.
+      // TODO():
+      return;
+    } else if (rr.atype == MG_DNS_RTYPE_PTR) {  // serve PTR + SRV + TXT + A
+      // TODO(): RFC-6762 6: each responder SHOULD delay its response by a
+      // random amount of time selected with uniform random distribution in the
+      // range 20-120 ms. Response to PTR is local_name._myservice._tcp.local
+      uint8_t *o = p, *aux;
+      uint16_t offset;
+      if (respname->buf == NULL || respname->len == 0) return;
+      if ((sizeof(*h) + req.r->srvcproto.len + 8 + respname->len + 13 + 2 +
+           respname->len + 19 + 2 + req.r->txt.len + 10 + 2 + 14) >
+          sizeof(buf))  // srv name + PTR + 2 + SRV + 2 + TXT + 2 + A
+        return;
+      h->num_other_prs = mg_htons(3);  // 3 additional records
+      p = build_srv_name(p, req.r);
+      aux = build_ptr_record(respname, p, (uint16_t) (o - buf));
+      o = p + sizeof(mdns_answer);  // point to PTR response (full srvc name)
+      offset = mg_htons((uint16_t) (o - buf));
+      o = p - 7;  // point to '.local' label (\x05local\x00)
+      p = aux;
+      memcpy(p, &offset, 2);  // point to full srvc name, in record
+      *p |= 0xC0, p += 2;
+      aux = p;
+      p = build_srv_record(respname, p, req.r, (uint16_t) (o - buf));
+      o = aux + sizeof(mdns_answer) + 6;  // point to target in SRV
+      memcpy(p, &offset, 2);              // point to full srvc name, in record
+      *p |= 0xC0, p += 2;
+      p = build_txt_record(p, req.r);
+      offset = mg_htons((uint16_t) (o - buf));
+      memcpy(p, &offset, 2);  // point to target name, in record
+      *p |= 0xC0, p += 2;
+      p = build_a_record(c, p, req.addr);
+    } else if (rr.atype == MG_DNS_RTYPE_TXT) {
+      if ((sizeof(*h) + req.r->srvcproto.len + 8 + req.r->txt.len + 10) >
+          sizeof(buf))  // srv name + TXT
+        return;
+      p = build_srv_name(p, req.r);
+      p = build_txt_record(p, req.r);
+    } else if (rr.atype == MG_DNS_RTYPE_SRV) {  // serve SRV + A
+      uint8_t *o, *aux;
+      uint16_t offset;
+      if (respname->buf == NULL || respname->len == 0) return;
+      if ((sizeof(*h) + req.r->srvcproto.len + 8 + respname->len + 19 + 2 +
+           14) > sizeof(buf))  // srv name + SRV + 2 + A
+        return;
+      h->num_other_prs = mg_htons(1);  // 1 additional record
+      p = build_srv_name(p, req.r);
+      o = p - 7;  // point to '.local' label (\x05local\x00)
+      aux = p;
+      p = build_srv_record(respname, p, req.r, (uint16_t) (o - buf));
+      o = aux + sizeof(mdns_answer) + 6;  // point to target in SRV
+      offset = mg_htons((uint16_t) (o - buf));
+      memcpy(p, &offset, 2);  // point to target name, in record
+      *p |= 0xC0, p += 2;
+      p = build_a_record(c, p, req.addr);
+    } else {  // A requested
+      // RFC-6762 6: 0 Auth, 0 Additional RRs
+      if (respname->buf == NULL || respname->len == 0) return;
+      if ((sizeof(*h) + respname->len + 8 + 14) > sizeof(buf))  // name + A
+        return;
+      p = build_name(respname, p);
+      p = build_a_record(c, p, req.addr);
+    }
+    if (!req.is_unicast) mg_multicast_restore(c, (uint8_t *) &c->loc);
+    mg_send(c, buf, (size_t) (p - buf));  // And send it!
+    MG_DEBUG(("%M > %M", mg_print_ip_port, &c->loc, mg_print_ip_port, &c->rem));
+    MG_DEBUG(("mDNS %s response sent", req.is_unicast ? "unicast" : "mcast"));
+  }
+}
+
+static void handle_mdns_response(struct mg_connection *c) {
+  struct mg_dns_header *rh = (struct mg_dns_header *) c->recv.buf;
+  struct mg_dns_rr rr;
+  size_t n;
+  // Parse first response, offset 12 is header size
+  n = mg_dns_parse_rr(c->recv.buf, c->recv.len, 12, false, &rr);
+  MG_VERBOSE(("mDNS response parsed, result=%d", (int) n));
+  if (n > 0) {
+    // RFC-6762 Appendix C, RFC2181 11: m(n + 1-63), max 255 + 0x0
+    char name[256];
+    uint8_t name_len;
+    struct mg_mdns_resp resp;
+    memset(&resp, 0, sizeof(resp));
+    if (rh->num_answers > mg_htons(1)) MG_DEBUG(("ignoring > 1 answers"));
+    mg_dns_parse_name(c->recv.buf, c->recv.len, 12, name, sizeof(name));
+    name_len = (uint8_t) strlen(name);  // verify it ends in .local
+    MG_VERBOSE(("RR %u %u %s", (unsigned int) rr.atype,
+                (unsigned int) rr.aclass, name));
+    if (rr.alen == 4 && rr.atype == MG_DNS_RTYPE_A &&
+        (rr.aclass & 0x7FFF) == 1) {
+      resp.addr.is_ip6 = false;
+      memcpy(resp.addr.addr.ip, (char *) (rh + 1) + n - 4, 4);
+      MG_DEBUG(("A response from %.*s = %M", name_len, name, mg_print_ip,
+                &resp.addr));
+      //    } else if (rr.alen == 16 && rr.atype == MG_DNS_RTYPE_AAAA &&
+      //    (rr.aclass & 0x7FFF) == 1) {
+      //      resp.addr.is_ip6 = true;
+      //      memcpy(resp.addr.addr.ip, (char *)(rh + 1) + n - 16], 16);
+      //      MG_DEBUG(("AAAA response from %.*s = %M", name_len, name,
+      //      mg_print_ip, &resp.addr));
+    } else {
+      return;
+    }
+    resp.name = mg_str_n(name, name_len);
+    resp.rr = &rr;
+    mg_call(c, MG_EV_MDNS_RESP, &resp);
+  }
+}
+
+static void handle_mdns_record(struct mg_connection *c) {
+  struct mg_dns_header *h = (struct mg_dns_header *) c->recv.buf;
+  if (c->recv.len <= 12) return;
+  if ((h->flags & mg_htons(0xF800)) == 0) {
+    // flags -> !resp, opcode=0 => query; ignore other opcodes
+    handle_mdns_query(c);
+  } else if ((h->flags & mg_htons(0xF800)) == mg_htons(0x8000)) {
+    // flags -> resp, opcode=0 => response; ignore other opcodes
+    handle_mdns_response(c);
+  }
+}
+
 static void mdns_cb(struct mg_connection *c, int ev, void *ev_data) {
   if (ev == MG_EV_READ) {
-    struct mg_dns_header *qh = (struct mg_dns_header *) c->recv.buf;
+    handle_mdns_record(c);
-    if (c->recv.len > 12 && (qh->flags & mg_htons(0xF800)) == 0) {
-      // flags -> !resp, opcode=0 => query; ignore other opcodes and responses
-      struct mg_dns_rr rr;  // Parse first question, offset 12 is header size
-      size_t n = mg_dns_parse_rr(c->recv.buf, c->recv.len, 12, true, &rr);
-      MG_VERBOSE(("mDNS request parsed, result=%d", (int) n));
-      if (n > 0) {
-        // RFC-6762 Appendix C, RFC2181 11: m(n + 1-63), max 255 + 0x0
-        // buf and h declared here to ease future expansion to DNS-SD
-        uint8_t buf[sizeof(struct mg_dns_header) + 256 + sizeof(mdns_answer) + 4];
-        struct mg_dns_header *h = (struct mg_dns_header *) buf;
-        char local_name[63 + 7];  // name label + '.' + local label + '\0'
-        uint8_t name_len = (uint8_t) strlen((char *)c->fn_data);
-        struct mg_dns_message dm;
-        bool unicast = (rr.aclass & MG_BIT(15)) != 0;  // QU
-        // uint16_t q = mg_ntohs(qh->num_questions);
-        rr.aclass &= (uint16_t) ~MG_BIT(15);  // remove "QU" (unicast response)
-        qh->num_questions = mg_htons(1);      // parser sanity
-        mg_dns_parse(c->recv.buf, c->recv.len, &dm);
-        if (name_len > (sizeof(local_name) - 7))  // leave room for .local\0
-          name_len = sizeof(local_name) - 7;
-        memcpy(local_name, c->fn_data, name_len);
-        strcpy(local_name + name_len, ".local");  // ensure proper name.local\0
-        if (strcmp(local_name, dm.name) == 0) {
-          uint8_t *p = &buf[sizeof(*h)];
-          memset(h, 0, sizeof(*h));            // clear header
-          h->txnid = unicast ? qh->txnid : 0;  // RFC-6762 18.1
-          // RFC-6762 6: 0 questions, 1 Answer, 0 Auth, 0 Additional RRs
-          h->num_answers = mg_htons(1);  // only one answer
-          h->flags = mg_htons(0x8400);   // Authoritative response
-          *p++ = name_len;               // label 1
-          memcpy(p, c->fn_data, name_len), p += name_len;
-          *p++ = 5;  // label 2
-          memcpy(p, "local", 5), p += 5;
-          *p++ = 0;  // no more labels
-          memcpy(p, mdns_answer, sizeof(mdns_answer)), p += sizeof(mdns_answer);
-#if MG_ENABLE_TCPIP
-          memcpy(p, &c->mgr->ifp->ip, 4), p += 4;
-#else
-          memcpy(p, c->data, 4), p += 4;
-#endif
-          if (!unicast) memcpy(&c->rem, &c->loc, sizeof(c->rem));
-          mg_send(c, buf, (size_t)(p - buf));  // And send it!
-          MG_DEBUG(("mDNS %c response sent", unicast ? 'U' : 'M'));
-        }
-      }
-    }
     mg_iobuf_del(&c->recv, 0, c->recv.len);
   }
   (void) ev_data;
 }
 
 void mg_multicast_add(struct mg_connection *c, char *ip);
-struct mg_connection *mg_mdns_listen(struct mg_mgr *mgr, char *name) {
+struct mg_connection *mg_mdns_listen(struct mg_mgr *mgr, mg_event_handler_t fn,
+                                     void *fn_data) {
   struct mg_connection *c =
-      mg_listen(mgr, "udp://224.0.0.251:5353", mdns_cb, name);
+      mg_listen(mgr, "udp://224.0.0.251:5353", fn, fn_data);
-  if (c != NULL) mg_multicast_add(c, (char *)"224.0.0.251");
+  if (c == NULL) return NULL;
+  c->pfn = mdns_cb, c->pfn_data = fn_data;
+  mg_multicast_add(c, (char *) "224.0.0.251");
   return c;
 }
 
+bool mg_mdns_query(struct mg_connection *c, const char *name,
+                   unsigned int rtype) {
+  struct mg_str name_;
+  name_.buf = (char *) name, name_.len = strlen(name);
+  mg_multicast_restore(c, (uint8_t *) &c->loc);
+  (void) rtype;
+  return mg_dns_send(c, &name_, 0, false);
+}

src/dns.h

@@ -3,6 +3,12 @@
 #include "net.h"
 #include "str.h"
 
+#define MG_DNS_RTYPE_A 1
+#define MG_DNS_RTYPE_PTR 12
+#define MG_DNS_RTYPE_TXT 16
+#define MG_DNS_RTYPE_AAAA 28
+#define MG_DNS_RTYPE_SRV 33
+
 // Mongoose sends DNS queries that contain only one question:
 // either A (IPv4) or AAAA (IPv6) address lookup.
 // Therefore, we expect zero or one answer.
@@ -31,10 +37,39 @@ struct mg_dns_rr {
   uint16_t alen;    // Address length
 };
 
+// DNS-SD response record
+struct mg_dnssd_record {
+  struct mg_str srvcproto;  // service.proto, service name
+  struct mg_str txt;        // TXT record contents
+  uint16_t port;            // SRV record port
+};
+
+// mDNS request and response data structs passed to event handlers
+struct mg_mdns_req {
+  struct mg_dns_rr *rr;
+  struct mg_dnssd_record *r;
+  struct mg_str reqname;   // requested name in RR
+  struct mg_str respname;  // actual name to use in response
+  struct mg_addr *addr;    // actual address to use in response
+  bool is_listing;
+  bool is_resp;
+  bool is_unicast;
+};
+
+struct mg_mdns_resp {
+  struct mg_dns_rr *rr;
+  // TODO(scaprile )struct mg_str srvcproto; struct mg_str txt; uint16_t port; ?
+  struct mg_str name;
+  struct mg_addr addr;
+  // TODO(scaprile); bool has_A; bool has_PTR; bool has_SRV; bool has_TXT; ?
+};
+
 void mg_resolve(struct mg_connection *, const char *url);
 void mg_resolve_cancel(struct mg_connection *);
 bool mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *);
 size_t mg_dns_parse_rr(const uint8_t *buf, size_t len, size_t ofs,
                        bool is_question, struct mg_dns_rr *);
-                       
+
-struct mg_connection *mg_mdns_listen(struct mg_mgr *mgr, char *name);
+struct mg_connection *mg_mdns_listen(struct mg_mgr *mgr, mg_event_handler_t fn,
+                                     void *fn_data);
+bool mg_mdns_query(struct mg_connection *, const char *, unsigned int);

src/drivers/cyw.c

@@ -13,28 +13,42 @@
 #endif
 
 static struct mg_tcpip_if *s_ifp;
+static uint32_t s_ip, s_mask;
 static bool s_link, s_auth, s_join;
 
+static void wifi_cb(struct mg_tcpip_if *ifp, int ev, void *ev_data) {
+  struct mg_wifi_data *wifi = &((struct mg_tcpip_driver_cyw_data *) ifp->driver_data)->wifi;
+  if (wifi->apmode && ev == MG_TCPIP_EV_ST_CHG && *(uint8_t *) ev_data == MG_TCPIP_STATE_UP) {
+    MG_DEBUG(("Access Point started"));
+    s_ip = ifp->ip, ifp->ip = wifi->apip;
+    s_mask = ifp->mask, ifp->mask = wifi->apmask;
+    ifp->enable_dhcp_client = false;
+    ifp->enable_dhcp_server = true;
+  }
+}
+
 static bool cyw_init(uint8_t *mac);
 static void cyw_poll(void);
 
 static bool mg_tcpip_driver_cyw_init(struct mg_tcpip_if *ifp) {
   struct mg_tcpip_driver_cyw_data *d =
       (struct mg_tcpip_driver_cyw_data *) ifp->driver_data;
+  struct mg_wifi_data *wifi = &d->wifi;
   if (MG_BIG_ENDIAN) {
     MG_ERROR(("Big-endian host"));
     return false;
   }
   s_ifp = ifp;
+  s_ip = ifp->ip;
+  s_mask = ifp->mask;
   s_link = s_auth = s_join = false;
+  ifp->pfn = wifi_cb;
   if (!cyw_init(ifp->mac)) return false;
 
-  if (d->apmode) {
+  if (wifi->apmode) {
-    MG_DEBUG(("Starting AP '%s' (%u)", d->apssid, d->apchannel));
+    return mg_wifi_ap_start(wifi);
-    return mg_wifi_ap_start(d->apssid, d->appass, d->apchannel);
+  } else if (wifi->ssid != NULL && wifi->pass != NULL) {
-  } else if (d->ssid != NULL && d->pass != NULL) {
+    return mg_wifi_connect(wifi);
-    MG_DEBUG(("Connecting to '%s'", d->ssid));
-    return mg_wifi_connect(d->ssid, d->pass);
   }
   return true;
 }
@@ -44,7 +58,7 @@ size_t mg_tcpip_driver_cyw_output(const void *buf, size_t len,
                                   struct mg_tcpip_if *ifp) {
   struct mg_tcpip_driver_cyw_data *d =
       (struct mg_tcpip_driver_cyw_data *) ifp->driver_data;
-  return mg_cyw_tx(d->apmode ? 1 : 0, (void *) buf, len) >= len ? len : 0;
+  return mg_cyw_tx(d->wifi.apmode ? 1 : 0, (void *) buf, len) >= len ? len : 0;
 }
 
 static bool mg_tcpip_driver_cyw_poll(struct mg_tcpip_if *ifp, bool s1) {
@@ -52,7 +66,7 @@ static bool mg_tcpip_driver_cyw_poll(struct mg_tcpip_if *ifp, bool s1) {
   if (!s1) return false;
   struct mg_tcpip_driver_cyw_data *d =
       (struct mg_tcpip_driver_cyw_data *) ifp->driver_data;
-  return d->apmode ? s_link : s_link && s_auth && s_join;
+  return d->wifi.apmode ? s_link : s_link && s_auth && s_join;
 }
 
 struct mg_tcpip_driver mg_tcpip_driver_cyw = {mg_tcpip_driver_cyw_init,
@@ -279,7 +293,7 @@ static void cyw_handle_bdc_evnt(struct bdc_hdr *bdc, size_t len) {
     uint32_t status = mg_ntohl(msg->event.status);
     uint32_t reason = mg_ntohl(msg->event.reason);
     uint16_t flags = mg_ntohs(msg->event.flags);
-    MG_DEBUG(("BCM event %lu %lu %lu %p", event_type, status, reason, flags));
+    MG_VERBOSE(("BCM evt %lu %lu %lu %p", event_type, status, reason, flags));
     if (event_type == 16 && status == 0) {  // Link
       s_link = flags & 1;
     } else if (event_type == 46 && s_link) {  // PSK sup with link up
@@ -345,7 +359,7 @@ static bool cyw_wifi_connect(char *ssid, char *pass) {
   uint32_t data[64/4 + 1]; // max pass length: 64 for WPA, 128 for WPA3 SAE
   uint16_t *da = (uint16_t *) data;
   unsigned int len;
-  uint32_t val; 
+  uint32_t val;
   val = 4; // security type: 0 for none, 2 for WPA, 4 for WPA2/WPA3, 6 for mixed WPA/WPA2
   // sup_wpa[1] = 0 if not using security
   if (!(cyw_ioctl_set(134 /* SET_WSEC */, (uint8_t *)&val, sizeof(val))
@@ -387,7 +401,7 @@ static bool cyw_wifi_ap_start(char *ssid, char *pass, unsigned int channel) {
   uint32_t data[64/4 + 2]; // max pass length: 64 for WPA, 128 for WPA3 SAE
   uint16_t *da = (uint16_t *) data;
   unsigned int len;
-  uint32_t val; 
+  uint32_t val;
   // CHIP DEPENDENCY
   // RPi set the AMPDU parameter for AP (window size = 2) *****************
   // val = 2 ; cyw_ioctl_iovar_set_(0, "ampdu_ba_wsize", (uint8_t *)&val, sizeof(val));
@@ -416,10 +430,10 @@ static bool cyw_wifi_ap_start(char *ssid, char *pass, unsigned int channel) {
   da[1] = 1; // indicates wireless security key, skip for WPA3 SAE
   memcpy((uint8_t *)data + 2 * sizeof(uint16_t), pass, len); // skip for WPA3 SAE
   if (!cyw_ioctl_set_(1, 268 /* SET_WSEC_PMK */, data, sizeof(data))) return false; // skip for WPA3 SAE, sizeof/2 if supporting SAE but using WPA
-  /* for WPA3 SAE: 
+  /* for WPA3 SAE:
     memcpy((uint8_t *)data + sizeof(uint16_t), pass, len);
     cyw_ioctl_iovar_set_(1, "sae_password", data, sizeof(data)); */
-  /* for WPA3 or mixed WPA2/WPA3: 
+  /* for WPA3 or mixed WPA2/WPA3:
     val = 5 ; cyw_ioctl_iovar_set_(1, "sae_max_pwe_loop", (uint8_t *)&val, sizeof(val));  // Some chipsets do not support this */
   // resume if not using auth
 
@@ -565,7 +579,7 @@ static void cyw_handle_scan_result(uint32_t status, struct scan_result *data, si
     bss.band = band & CYW_BSS_BAND2G ? MG_WIFI_BAND_2G : MG_WIFI_BAND_5G;
     bss.security = (sbss->capability & MG_BIT(4) /* CAP_PRIVACY */) ? MG_WIFI_SECURITY_WEP : MG_WIFI_SECURITY_OPEN;
     { // travel IEs (Information Elements) in search of security definitions
-      const uint8_t wot1[4] = {0x00, 0x50, 0xf2, 0x01}; // WPA_OUI_TYPE1                     
+      const uint8_t wot1[4] = {0x00, 0x50, 0xf2, 0x01}; // WPA_OUI_TYPE1
       uint8_t *ie = (uint8_t *)sbss + sbss->ie_offset;
       int bytes = (int) sbss->ie_length;
       while (bytes > 0 && ie[1] + 2 < bytes) { // ie[0] -> type, ie[1] -> bytes from ie[2]
@@ -576,11 +590,11 @@ static void cyw_handle_scan_result(uint32_t status, struct scan_result *data, si
         bytes -= ie[1] + 2;
       }
     }
-    MG_VERBOSE(("BSS: %.*s (%u) (%M) %d dBm %u", bss.SSID.len, bss.SSID.buf, bss.channel, mg_print_mac, bss.BSSID, (int) bss.RSSI, bss.security));  
+    MG_VERBOSE(("BSS: %.*s (%u) (%M) %d dBm %u", bss.SSID.len, bss.SSID.buf, bss.channel, mg_print_mac, bss.BSSID, (int) bss.RSSI, bss.security));
     mg_tcpip_call(s_ifp, MG_TCPIP_EV_WIFI_SCAN_RESULT, &bss);
   } else {
     MG_ERROR(("scan error"));
-  } 
+  }
 }
 // clang-format on
 
@@ -602,7 +616,7 @@ static void cyw_handle_cdc(struct cdc_hdr *cdc, size_t len) {
     return;
   }
   if (mg_log_level >= MG_LL_VERBOSE) mg_hexdump((void *) cdc, len);
-  MG_DEBUG(("IOCTL result: %02x %02x %02x %02x ...", r[0], r[1], r[2], r[3]));
+  MG_VERBOSE(("IOCTL result: %02x %02x %02x %02x ..", r[0], r[1], r[2], r[3]));
   s_ioctl_resp = r;
 }
 // NOTE(): alt no loop handler dispatching IOCTL response to current handler:
@@ -772,7 +786,7 @@ static bool cyw_init(uint8_t *mac) {
   // CHIP DEPENDENCY
   val = 8 ; cyw_ioctl_iovar_set("ampdu_ba_wsize", (uint8_t *)&val, sizeof(val));
   val = 4 ; cyw_ioctl_iovar_set("ampdu_mpdu", (uint8_t *)&val, sizeof(val));
-  val = 0 /* 8K */; cyw_ioctl_iovar_set("ampdu_rx_factor", (uint8_t *)&val, sizeof(val));  
+  val = 0 /* 8K */; cyw_ioctl_iovar_set("ampdu_rx_factor", (uint8_t *)&val, sizeof(val));
   //
   {
     struct cyw_country c;
@@ -990,7 +1004,7 @@ static bool cyw_load_fwll(void *fwdata, size_t fwlen, void *nvramdata, size_t nv
   cyw_load_data(CYW_CHIP_ATCMRAM_BASE, fwdata, fwlen);
   mg_delayms(5); // TODO(scaprile): CHECK IF THIS IS ACTUALLY NEEDED
   // Load NVRAM and place 'length ~length' at the end; end of chip RAM
-  { 
+  {
     const uint32_t start = CYW_CHIP_RAM_SIZE - 4 - nvramlen;
     cyw_load_data(start, nvramdata, nvramlen); // nvramlen must be a multiple of 4
     // RAM_SIZE is a multiple of WINSZ, so the place for len ~len will be at the end of the window
@@ -1035,7 +1049,7 @@ static size_t cyw_spi_poll(uint8_t *response) {
     cyw_spi_write(CYW_SPID_FUNC_BUS, CYW_BUS_SPI_INT, &val, sizeof(val));
     return 0;
   }
-  cyw_spi_read(CYW_SPID_FUNC_WLAN, 0,  response, len);
+  cyw_spi_read(CYW_SPID_FUNC_WLAN, 0,  response, (uint16_t)len);
   return len;
 }
 
@@ -1098,7 +1112,7 @@ static bool cyw_spi_init() {
   cyw_set_backplane_window(CYW_CHIP_CHIPCOMMON); // set backplane window to start of CHIPCOMMON area
   cyw_spi_read(CYW_SPID_FUNC_CHIP, (CYW_CHIP_CHIPCOMMON + 0x00) & CYW_CHIP_BCKPLN_ADDRMSK, &val, 2);
   if (val == 43430) val = 4343;
-  MG_INFO(("WLAN chip is CYW%u%c", val), val == 4343 ? 'W' : ' '));
+  MG_INFO(("WLAN chip is CYW%u%c", val, val == 4343 ? 'W' : ' '));
 
   // Load firmware (code and NVRAM)
   if (!cyw_load_firmware(d->fw)) return false;
@@ -1281,7 +1295,7 @@ static bool cyw_sdio_init() {
   struct mg_tcpip_sdio *s = (struct mg_tcpip_sdio *) d->bus;
   uint32_t val = 0;
   if (!mg_sdio_init(s)) return false;
-  // no block transfers on F0. if (!mg_sdio_set_blksz(s, CYW_SDIO_FUNC_BUS, 32)) return false; 
+  // no block transfers on F0. if (!mg_sdio_set_blksz(s, CYW_SDIO_FUNC_BUS, 32)) return false;
   if (!mg_sdio_set_blksz(s, CYW_SDIO_FUNC_CHIP, 64)) return false;
   if (!mg_sdio_set_blksz(s, CYW_SDIO_FUNC_WLAN, 64)) return false;
   // TODO(scaprile): we don't handle SDIO interrupts, study CCCR INTEN and SDIO support (SDIO 6.3, 8)
@@ -1376,16 +1390,22 @@ bool mg_wifi_scan(void) {
   return cyw_wifi_scan();
 }
 
-bool mg_wifi_connect(char *ssid, char *pass) {
+bool mg_wifi_connect(struct mg_wifi_data *wifi) {
-  return cyw_wifi_connect(ssid, pass);
+  s_ifp->ip = s_ip;
+  s_ifp->mask = s_mask;
+  if (s_ifp->ip == 0) s_ifp->enable_dhcp_client = true;
+  s_ifp->enable_dhcp_server = false;
+  MG_DEBUG(("Connecting to '%s'", wifi->ssid));
+  return cyw_wifi_connect(wifi->ssid, wifi->pass);
 }
 
 bool mg_wifi_disconnect(void) {
   return cyw_wifi_disconnect();
 }
 
-bool mg_wifi_ap_start(char *ssid, char *pass, unsigned int channel) {
+bool mg_wifi_ap_start(struct mg_wifi_data *wifi) {
-  return cyw_wifi_ap_start(ssid, pass, channel);
+  MG_DEBUG(("Starting AP '%s' (%u)", wifi->apssid, wifi->apchannel));
+  return cyw_wifi_ap_start(wifi->apssid, wifi->appass, wifi->apchannel);
 }
 
 bool mg_wifi_ap_stop(void) {

src/drivers/cyw.h

@@ -22,35 +22,26 @@ struct mg_tcpip_driver_cyw_firmware {
 };
 
 struct mg_tcpip_driver_cyw_data {
+  struct mg_wifi_data wifi;
   void *bus;
   struct mg_tcpip_driver_cyw_firmware *fw;
-  char *ssid;
+  bool hs;  // use chip "high-speed" mode; otherwise SPI CPOL0 CPHA0 (DS 4.2.3 Table 6)
-  char *pass;
-  char *apssid;
-  char *appass;
-  uint8_t security; // TBD
-  uint8_t apsecurity; // TBD
-  uint8_t apchannel;
-  bool apmode;      // start in AP mode; 'false' starts connection to 'ssid' if not NULL
-  bool hs;          // use chip "high-speed" mode; otherwise SPI CPOL0 CPHA0 (DS 4.2.3 Table 6)
 };
 
-#if 0
+#define MG_TCPIP_DRIVER_INIT(mgr)                              \
-#define MG_TCPIP_DRIVER_INIT(mgr)                                 \
+  do {                                                         \
-  do {                                                            \
+    static struct mg_tcpip_driver_cyw_data driver_data_;       \
-    static struct mg_tcpip_driver_cyw_data driver_data_;          \
+    static struct mg_tcpip_if mif_;                            \
-    static struct mg_tcpip_if mif_;                               \
+    MG_SET_WIFI_CONFIG(&driver_data_);                         \
-    MG_SET_WIFI_CONFIG(&driver_data_);                            \
+    mif_.ip = MG_TCPIP_IP;                                     \
-    mif_.ip = MG_TCPIP_IP;                                        \
+    mif_.mask = MG_TCPIP_MASK;                                 \
-    mif_.mask = MG_TCPIP_MASK;                                    \
+    mif_.gw = MG_TCPIP_GW;                                     \
-    mif_.gw = MG_TCPIP_GW;                                        \
+    mif_.driver = &mg_tcpip_driver_cyw;                        \
-    mif_.driver = &mg_tcpip_driver_pico_w;                        \
+    mif_.driver_data = &driver_data_;                          \
-    mif_.driver_data = &driver_data_;                             \
+    mif_.recv_queue.size = 8192;                               \
-    mif_.recv_queue.size = 8192;                                  \
+    mif_.mac[0] = 2; /* MAC read from OTP at driver init */    \
-    mif_.mac[0] = 2; /* MAC read from OTP at driver init */       \
+    mg_tcpip_init(mgr, &mif_);                                 \
-    mg_tcpip_init(mgr, &mif_);                                    \
     MG_INFO(("Driver: cyw, MAC: %M", mg_print_mac, mif_.mac)); \
   } while (0)
-#endif
 
 #endif

src/drivers/imxrt.c

@@ -2,7 +2,8 @@
 
 #if MG_ENABLE_TCPIP && \
   (defined(MG_ENABLE_DRIVER_IMXRT10) && MG_ENABLE_DRIVER_IMXRT10) || \
-  (defined(MG_ENABLE_DRIVER_IMXRT11) && MG_ENABLE_DRIVER_IMXRT11)
+  (defined(MG_ENABLE_DRIVER_IMXRT11) && MG_ENABLE_DRIVER_IMXRT11) || \
+  (defined(MG_ENABLE_DRIVER_MCXE) && MG_ENABLE_DRIVER_MCXE)
 struct imxrt_enet {
   volatile uint32_t RESERVED0, EIR, EIMR, RESERVED1, RDAR, TDAR, RESERVED2[3],
       ECR, RESERVED3[6], MMFR, MSCR, RESERVED4[7], MIBC, RESERVED5[7], RCR,
@@ -31,9 +32,12 @@ struct imxrt_enet {
 #if defined(MG_ENABLE_DRIVER_IMXRT11) && MG_ENABLE_DRIVER_IMXRT11
 #define ENET ((struct imxrt_enet *) (uintptr_t) 0x40424000U)
 #define ETH_DESC_CNT 5     // Descriptors count
-#else
+#elif defined(MG_ENABLE_DRIVER_IMXRT10) && MG_ENABLE_DRIVER_IMXRT10
 #define ENET ((struct imxrt_enet *) (uintptr_t) 0x402D8000U)
 #define ETH_DESC_CNT 4     // Descriptors count
+#else // MG_ENABLE_DRIVER_MCXE
+#define ENET ((struct imxrt_enet *) (uintptr_t) 0x40079000U)
+#define ETH_DESC_CNT 4     // Descriptor count
 #endif
 
 #define ETH_PKT_SIZE 1536  // Max frame size, 64-bit aligned
@@ -44,15 +48,12 @@ struct enet_desc {
   uint32_t *buffer;  // Data ptr
 };
 
-// TODO(): handle these in a portable compiler-independent CMSIS-friendly way
-#define MG_64BYTE_ALIGNED __attribute__((aligned((64U))))
-
 // Descriptors: in non-cached area (TODO(scaprile)), (37.5.1.22.2 37.5.1.23.2)
 // Buffers: 64-byte aligned (37.3.14)
-static volatile struct enet_desc s_rxdesc[ETH_DESC_CNT] MG_64BYTE_ALIGNED;
+static volatile struct enet_desc s_rxdesc[ETH_DESC_CNT] MG_ETH_RAM MG_64BYTE_ALIGNED;
-static volatile struct enet_desc s_txdesc[ETH_DESC_CNT] MG_64BYTE_ALIGNED;
+static volatile struct enet_desc s_txdesc[ETH_DESC_CNT] MG_ETH_RAM MG_64BYTE_ALIGNED;
-static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_64BYTE_ALIGNED;
+static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_ETH_RAM MG_64BYTE_ALIGNED;
-static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_64BYTE_ALIGNED;
+static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_ETH_RAM MG_64BYTE_ALIGNED;
 static struct mg_tcpip_if *s_ifp;  // MIP interface
 
 static uint16_t enet_read_phy(uint8_t addr, uint8_t reg) {
@@ -189,9 +190,14 @@ static bool mg_tcpip_driver_imxrt_poll(struct mg_tcpip_if *ifp, bool s1) {
   return up;
 }
 
-void ENET_IRQHandler(void);
 static uint32_t s_rxno;
+#if !defined(MG_ENABLE_DRIVER_MCXE)
+void ENET_IRQHandler(void);
 void ENET_IRQHandler(void) {
+#else
+void ENET_Receive_IRQHandler(void);
+void ENET_Receive_IRQHandler(void) {
+#endif
   ENET->EIR = MG_BIT(25);  // Ack IRQ
   // Frame received, loop
   for (uint32_t i = 0; i < 10; i++) {  // read as they arrive but not forever

src/drivers/imxrt.h

@@ -2,7 +2,8 @@
 
 #if MG_ENABLE_TCPIP && \
   (defined(MG_ENABLE_DRIVER_IMXRT10) && MG_ENABLE_DRIVER_IMXRT10) || \
-  (defined(MG_ENABLE_DRIVER_IMXRT11) && MG_ENABLE_DRIVER_IMXRT11)
+  (defined(MG_ENABLE_DRIVER_IMXRT11) && MG_ENABLE_DRIVER_IMXRT11) || \
+  (defined(MG_ENABLE_DRIVER_MCXE) && MG_ENABLE_DRIVER_MCXE)
 
 struct mg_tcpip_driver_imxrt_data {
   // MDC clock divider. MDC clock is derived from IPS Bus clock (ipg_clk),

src/drivers/nxp_wifi.c

@@ -0,0 +1,91 @@
+#if MG_ENABLE_TCPIP && defined(MG_ENABLE_DRIVER_NXP_WIFI) && \
+    MG_ENABLE_DRIVER_NXP_WIFI
+
+#include "drivers/nxp_wifi.h"
+
+bool __attribute__((weak)) netif_init(struct mg_tcpip_if *ifp) {
+  (void) ifp;
+  MG_ERROR(("Please link wifi/port/net contents"));
+  return false;
+}
+size_t __attribute__((weak))
+netif_tx(const void *bfr, size_t len, struct mg_tcpip_if *ifp) {
+  (void) bfr;
+  (void) len;
+  netif_init(ifp);
+  return 0;
+}
+bool __attribute__((weak)) netif_connect(struct mg_wifi_data *wifi) {
+  (void) wifi;
+  return netif_init(NULL);
+}
+bool __attribute__((weak))
+netif_poll(struct mg_tcpip_if *ifp, bool s1, mg_tcpip_event_handler_t evcb) {
+  (void) ifp;
+  (void) s1;
+  (void) evcb;
+  return false;
+}
+
+static struct mg_tcpip_if *s_ifp;
+static uint32_t s_ip, s_mask;
+
+static void wifi_cb(struct mg_tcpip_if *ifp, int ev, void *ev_data) {
+  struct mg_wifi_data *wifi =
+      &((struct mg_tcpip_driver_nxp_wifi_data *) ifp->driver_data)->wifi;
+  if (wifi->apmode && ev == MG_TCPIP_EV_ST_CHG &&
+      *(uint8_t *) ev_data == MG_TCPIP_STATE_UP) {
+    MG_DEBUG(("Access Point started"));
+    s_ip = ifp->ip, ifp->ip = wifi->apip;
+    s_mask = ifp->mask, ifp->mask = wifi->apmask;
+    ifp->enable_dhcp_client = false;
+    ifp->enable_dhcp_server = true;
+  }
+}
+
+static bool nxp_wifi_init(struct mg_tcpip_if *ifp) {
+  struct mg_wifi_data *wifi =
+      &((struct mg_tcpip_driver_nxp_wifi_data *) ifp->driver_data)->wifi;
+  s_ifp = ifp;
+  s_ip = ifp->ip;
+  s_mask = ifp->mask;
+  ifp->pfn = wifi_cb;
+  if (!netif_init(ifp)) return false;
+  if (wifi->apmode) {
+    return mg_wifi_ap_start(wifi);
+  } else if (wifi->ssid != NULL && wifi->pass != NULL) {
+    return mg_wifi_connect(wifi);
+  }
+  return true;
+}
+
+bool nxp_wifi_poll(struct mg_tcpip_if *ifp, bool s1) {
+  return netif_poll(ifp, s1, mg_tcpip_call);
+}
+
+struct mg_tcpip_driver mg_tcpip_driver_nxp_wifi = {nxp_wifi_init, netif_tx,
+                                                   NULL, nxp_wifi_poll};
+
+bool mg_wifi_connect(struct mg_wifi_data *wifi) {
+  s_ifp->ip = s_ip;
+  s_ifp->mask = s_mask;
+  if (s_ifp->ip == 0) s_ifp->enable_dhcp_client = true;
+  s_ifp->enable_dhcp_server = false;
+  return netif_connect(wifi);
+}
+
+bool __attribute__((weak)) mg_wifi_scan(void) {
+  return netif_init(NULL);
+}
+bool __attribute__((weak)) mg_wifi_disconnect(void) {
+  return netif_init(NULL);
+}
+bool __attribute__((weak)) mg_wifi_ap_start(struct mg_wifi_data *wifi) {
+  (void) wifi;
+  return netif_init(NULL);
+}
+bool __attribute__((weak)) mg_wifi_ap_stop(void) {
+  return netif_init(NULL);
+}
+
+#endif

src/drivers/nxp_wifi.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#if MG_ENABLE_TCPIP  && \
+    defined(MG_ENABLE_DRIVER_NXP_WIFI) && MG_ENABLE_DRIVER_NXP_WIFI
+
+
+struct mg_tcpip_driver_nxp_wifi_data {
+  struct mg_wifi_data wifi;
+};
+
+
+#define MG_TCPIP_DRIVER_INIT(mgr)                                   \
+  do {                                                              \
+    static struct mg_tcpip_driver_nxp_wifi_data driver_data_;       \
+    static struct mg_tcpip_if mif_;                                 \
+    MG_SET_WIFI_CONFIG(&driver_data_);                              \
+    mif_.ip = MG_TCPIP_IP;                                          \
+    mif_.mask = MG_TCPIP_MASK;                                      \
+    mif_.gw = MG_TCPIP_GW;                                          \
+    mif_.driver = &mg_tcpip_driver_nxp_wifi;                        \
+    mif_.driver_data = &driver_data_;                               \
+    mif_.recv_queue.size = 8192;                                    \
+    mif_.mac[0] = 2; /* MAC read from OTP at driver init */         \
+    mg_tcpip_init(mgr, &mif_);                                      \
+    MG_INFO(("Driver: nxp wifi, MAC: %M", mg_print_mac, mif_.mac)); \
+  } while (0)
+
+#endif

src/drivers/phy.c

@@ -1,13 +1,15 @@
 #include "phy.h"
 
 enum {                  // ID1  ID2
-  MG_PHY_KSZ8x = 0x22,  // 0022 1561 - KSZ8081RNB
+  MG_PHY_KSZ8x = 0x22,  // 0022 156x - KSZ8081RNB, KSZ8091RNB
   MG_PHY_DP83x = 0x2000,
   MG_PHY_DP83867 = 0xa231,  // 2000 a231 - TI DP83867I
   MG_PHY_DP83825 = 0xa140,  // 2000 a140 - TI DP83825I
   MG_PHY_DP83848 = 0x5ca2,  // 2000 5ca2 - TI DP83848I
   MG_PHY_LAN87x = 0x7,      // 0007 c0fx - LAN8720
-  MG_PHY_RTL8201 = 0x1C,    // 001c c816 - RTL8201,
+  MG_PHY_RTL82x = 0x1c,
+  MG_PHY_RTL8201 = 0xc816,  // 001c c816 - RTL8201F
+  MG_PHY_RTL8211 = 0xc916,  // 001c c916 - RTL8211F
   MG_PHY_ICS1894x = 0x15,
   MG_PHY_ICS189432 = 0xf450  // 0015 f450 - ICS1894
 };
@@ -24,8 +26,9 @@ enum {
   MG_PHY_KSZ8x_REG_PC1R = 30,
   MG_PHY_KSZ8x_REG_PC2R = 31,
   MG_PHY_LAN87x_REG_SCSR = 31,
-  MG_PHY_RTL8201_REG_RMSR = 16,  // in page 7
+  MG_PHY_RTL82x_REG_PAGESEL = 31,
-  MG_PHY_RTL8201_REG_PAGESEL = 31,
+  MG_PHY_RTL8201_REG_RMSR = 16,   // in page 7
+  MG_PHY_RTL8211_REG_PHYSR = 26,  // in page a43
   MG_PHY_ICS189432_REG_POLL = 17
 };
 
@@ -46,14 +49,20 @@ static const char *mg_phy_id_to_str(uint16_t id1, uint16_t id2) {
       return "KSZ8x";
     case MG_PHY_LAN87x:
       return "LAN87x";
-    case MG_PHY_RTL8201:
+    case MG_PHY_RTL82x:
-      return "RTL8201";
+      switch (id2) {
+        case MG_PHY_RTL8201:
+          return "RTL8201";
+        case MG_PHY_RTL8211:
+          return "RTL8211";
+        default:
+          return "RTL82x";
+      }
     case MG_PHY_ICS1894x:
       return "ICS1894x";
     default:
       return "unknown";
   }
-  (void) id2;
 }
 
 void mg_phy_init(struct mg_phy *phy, uint8_t phy_addr, uint8_t config) {
@@ -91,13 +100,15 @@ void mg_phy_init(struct mg_phy *phy, uint8_t phy_addr, uint8_t config) {
                      (uint16_t) (MG_BIT(15) | MG_BIT(8) | MG_BIT(7)));
     } else if (id1 == MG_PHY_LAN87x) {
       // nothing to do
-    } else if (id1 == MG_PHY_RTL8201) {
+    } else if (id1 == MG_PHY_RTL82x && id2 == MG_PHY_RTL8201) {
       // assume PHY has been hardware strapped properly
 #if 0
-      phy->write_reg(phy_addr, MG_PHY_RTL8201_REG_PAGESEL, 7);  // Select page 7
+      phy->write_reg(phy_addr, MG_PHY_RTL82x_REG_PAGESEL, 7);  // Select page 7
       phy->write_reg(phy_addr, MG_PHY_RTL8201_REG_RMSR, 0x1ffa);
-      phy->write_reg(phy_addr, MG_PHY_RTL8201_REG_PAGESEL, 0);  // Select page 0
+      phy->write_reg(phy_addr, MG_PHY_RTL82x_REG_PAGESEL, 0);  // Select page 0
 #endif
+    } else if (id1 == MG_PHY_RTL82x && id2 == MG_PHY_RTL8211) {
+      // assume PHY has been hardware strapped properly
     }
   }
 
@@ -137,10 +148,22 @@ bool mg_phy_up(struct mg_phy *phy, uint8_t phy_addr, bool *full_duplex,
       uint16_t scsr = phy->read_reg(phy_addr, MG_PHY_LAN87x_REG_SCSR);
       *full_duplex = scsr & MG_BIT(4);
       *speed = (scsr & MG_BIT(3)) ? MG_PHY_SPEED_100M : MG_PHY_SPEED_10M;
-    } else if (id1 == MG_PHY_RTL8201) {
+    } else if (id1 == MG_PHY_RTL82x) {
-      uint16_t bcr = phy->read_reg(phy_addr, MG_PHY_REG_BCR);
+      uint16_t id2 = phy->read_reg(phy_addr, MG_PHY_REG_ID2);
-      *full_duplex = bcr & MG_BIT(8);
+      if (id2 == MG_PHY_RTL8211) {
-      *speed = (bcr & MG_BIT(13)) ? MG_PHY_SPEED_100M : MG_PHY_SPEED_10M;
+        uint16_t physr;
+        phy->write_reg(phy_addr, MG_PHY_RTL82x_REG_PAGESEL, 0xa43);
+        physr = phy->read_reg(phy_addr, MG_PHY_RTL8211_REG_PHYSR);
+        phy->write_reg(phy_addr, MG_PHY_RTL82x_REG_PAGESEL, 0);
+        *full_duplex = physr & MG_BIT(3);
+        *speed = (physr & MG_BIT(5))   ? MG_PHY_SPEED_1000M
+                 : (physr & MG_BIT(4)) ? MG_PHY_SPEED_100M
+                                       : MG_PHY_SPEED_10M;
+      } else {
+        uint16_t bcr = phy->read_reg(phy_addr, MG_PHY_REG_BCR);
+        *full_duplex = bcr & MG_BIT(8);
+        *speed = (bcr & MG_BIT(13)) ? MG_PHY_SPEED_100M : MG_PHY_SPEED_10M;
+      }
     } else if (id1 == MG_PHY_ICS1894x) {
       uint16_t poll_reg = phy->read_reg(phy_addr, MG_PHY_ICS189432_REG_POLL);
       *full_duplex = poll_reg & MG_BIT(14);

src/drivers/pico-w.c

@@ -6,23 +6,41 @@
 #include "pico/stdlib.h"
 
 static struct mg_tcpip_if *s_ifp;
+static uint32_t s_ip, s_mask;
+static bool s_aplink = false, s_scanning = false;
+static bool s_stalink = false, s_connecting = false;
+
+static void wifi_cb(struct mg_tcpip_if *ifp, int ev, void *ev_data) {
+  struct mg_wifi_data *wifi =
+      &((struct mg_tcpip_driver_pico_w_data *) ifp->driver_data)->wifi;
+  if (wifi->apmode && ev == MG_TCPIP_EV_ST_CHG &&
+      *(uint8_t *) ev_data == MG_TCPIP_STATE_UP) {
+    MG_DEBUG(("Access Point started"));
+    s_ip = ifp->ip, ifp->ip = wifi->apip;
+    s_mask = ifp->mask, ifp->mask = wifi->apmask;
+    ifp->enable_dhcp_client = false;
+    ifp->enable_dhcp_server = true;
+  }
+}
 
 static bool mg_tcpip_driver_pico_w_init(struct mg_tcpip_if *ifp) {
   struct mg_tcpip_driver_pico_w_data *d =
       (struct mg_tcpip_driver_pico_w_data *) ifp->driver_data;
+  struct mg_wifi_data *wifi = &d->wifi;
   s_ifp = ifp;
+  s_ip = ifp->ip;
+  s_mask = ifp->mask;
+  ifp->pfn = wifi_cb;
   if (cyw43_arch_init() != 0)
     return false;  // initialize async_context and WiFi chip
-  if (d->apmode && d->apssid != NULL) {
+  if (wifi->apmode && wifi->apssid != NULL) {
-    MG_DEBUG(("Starting AP '%s' (%u)", d->apssid, d->apchannel));
+    if (!mg_wifi_ap_start(wifi)) return false;
-    if (!mg_wifi_ap_start(d->apssid, d->appass, d->apchannel)) return false;
     cyw43_wifi_get_mac(&cyw43_state, CYW43_ITF_STA, ifp->mac);  // same MAC
   } else {
     cyw43_arch_enable_sta_mode();
     cyw43_wifi_get_mac(&cyw43_state, CYW43_ITF_STA, ifp->mac);
-    if (d->ssid != NULL) {
+    if (wifi->ssid != NULL) {
-      MG_DEBUG(("Connecting to '%s'", d->ssid));
+      return mg_wifi_connect(wifi);
-      return mg_wifi_connect(d->ssid, d->pass);
     } else {
       cyw43_arch_disable_sta_mode();
     }
@@ -35,35 +53,33 @@ static size_t mg_tcpip_driver_pico_w_tx(const void *buf, size_t len,
   struct mg_tcpip_driver_pico_w_data *d =
       (struct mg_tcpip_driver_pico_w_data *) ifp->driver_data;
   return cyw43_send_ethernet(&cyw43_state,
-                             d->apmode ? CYW43_ITF_AP : CYW43_ITF_STA, len, buf,
+                             d->wifi.apmode ? CYW43_ITF_AP : CYW43_ITF_STA, len,
-                             false) == 0
+                             buf, false) == 0
              ? len
              : 0;
 }
 
-static bool s_aplink = false, s_scanning = false;
-static bool s_stalink = false, s_connecting = false;
-
 static bool mg_tcpip_driver_pico_w_poll(struct mg_tcpip_if *ifp, bool s1) {
   cyw43_arch_poll();  // not necessary, except when IRQs are disabled (OTA)
   if (s_scanning && !cyw43_wifi_scan_active(&cyw43_state)) {
     MG_VERBOSE(("scan complete"));
     s_scanning = 0;
-    mg_tcpip_call(s_ifp, MG_TCPIP_EV_WIFI_SCAN_END, NULL);
+    mg_tcpip_call(ifp, MG_TCPIP_EV_WIFI_SCAN_END, NULL);
   }
   if (ifp->update_mac_hash_table) {
     // first call to _poll() is after _init(), so this is safe
-    cyw43_wifi_update_multicast_filter(&cyw43_state, (uint8_t *)mcast_addr, true);
+    cyw43_wifi_update_multicast_filter(&cyw43_state, (uint8_t *) mcast_addr,
+                                       true);
     ifp->update_mac_hash_table = false;
   }
   if (!s1) return false;
   struct mg_tcpip_driver_pico_w_data *d =
       (struct mg_tcpip_driver_pico_w_data *) ifp->driver_data;
-  if (d->apmode) return s_aplink;
+  if (d->wifi.apmode) return s_aplink;
   int sdkstate = cyw43_wifi_link_status(&cyw43_state, CYW43_ITF_STA);
   MG_VERBOSE(("conn: %c state: %d", s_connecting ? '1' : '0', sdkstate));
   if (sdkstate < 0 && s_connecting) {
-    mg_tcpip_call(s_ifp, MG_TCPIP_EV_WIFI_CONNECT_ERR, &sdkstate);
+    mg_tcpip_call(ifp, MG_TCPIP_EV_WIFI_CONNECT_ERR, &sdkstate);
     s_connecting = false;
   }
   return s_stalink;
@@ -94,7 +110,7 @@ void cyw43_cb_tcpip_set_link_up(cyw43_t *self, int itf) {
 }
 void cyw43_cb_tcpip_set_link_down(cyw43_t *self, int itf) {
   if (itf == CYW43_ITF_AP) {
-     s_aplink = false;
+    s_aplink = false;
   } else {
     s_stalink = false;
     // SDK calls this before we check status, don't clear s_connecting here
@@ -134,9 +150,15 @@ bool mg_wifi_scan(void) {
   return res;
 }
 
-bool mg_wifi_connect(char *ssid, char *pass) {
+bool mg_wifi_connect(struct mg_wifi_data *wifi) {
+  s_ifp->ip = s_ip;
+  s_ifp->mask = s_mask;
+  if (s_ifp->ip == 0) s_ifp->enable_dhcp_client = true;
+  s_ifp->enable_dhcp_server = false;
   cyw43_arch_enable_sta_mode();
-  int res = cyw43_arch_wifi_connect_async(ssid, pass, CYW43_AUTH_WPA2_AES_PSK);
+  MG_DEBUG(("Connecting to '%s'", wifi->ssid));
+  int res = cyw43_arch_wifi_connect_async(wifi->ssid, wifi->pass,
+                                          CYW43_AUTH_WPA2_AES_PSK);
   MG_VERBOSE(("res: %d", res));
   if (res == 0) s_connecting = true;
   return (res == 0);
@@ -148,9 +170,11 @@ bool mg_wifi_disconnect(void) {
   return true;
 }
 
-bool mg_wifi_ap_start(char *ssid, char *pass, unsigned int channel) {
+bool mg_wifi_ap_start(struct mg_wifi_data *wifi) {
-  cyw43_wifi_ap_set_channel(&cyw43_state, channel);
+  MG_DEBUG(("Starting AP '%s' (%u)", wifi->apssid, wifi->apchannel));
-  cyw43_arch_enable_ap_mode(ssid, pass, CYW43_AUTH_WPA2_AES_PSK);
+  cyw43_wifi_ap_set_channel(&cyw43_state, wifi->apchannel);
+  cyw43_arch_enable_ap_mode(wifi->apssid, wifi->appass,
+                            CYW43_AUTH_WPA2_AES_PSK);
   return true;
 }
 

src/drivers/pico-w.h

@@ -8,14 +8,7 @@
 #include "pico/unique_id.h"     // keep this include
 
 struct mg_tcpip_driver_pico_w_data {
-  char *ssid;
+  struct mg_wifi_data wifi;
-  char *pass;
-  char *apssid;
-  char *appass;
-  uint8_t security; // TBD
-  uint8_t apsecurity; // TBD
-  uint8_t apchannel;
-  bool apmode;      // start in AP mode; 'false' starts connection to 'ssid' if not NULL
 };
 
 #define MG_TCPIP_DRIVER_INIT(mgr)                                 \

src/drivers/ra.c

@@ -38,16 +38,12 @@ struct ra_edmac {
 #define ETH_PKT_SIZE 1536  // Max frame size, multiple of 32
 #define ETH_DESC_CNT 4     // Descriptors count
 
-// TODO(): handle these in a portable compiler-independent CMSIS-friendly way
-#define MG_16BYTE_ALIGNED __attribute__((aligned((16U))))
-#define MG_32BYTE_ALIGNED __attribute__((aligned((32U))))
-
 // Descriptors: 16-byte aligned
 // Buffers: 32-byte aligned (27.3.1)
-static volatile uint32_t s_rxdesc[ETH_DESC_CNT][4] MG_16BYTE_ALIGNED;
+static volatile uint32_t s_rxdesc[ETH_DESC_CNT][4] MG_ETH_RAM MG_16BYTE_ALIGNED;
-static volatile uint32_t s_txdesc[ETH_DESC_CNT][4] MG_16BYTE_ALIGNED;
+static volatile uint32_t s_txdesc[ETH_DESC_CNT][4] MG_ETH_RAM MG_16BYTE_ALIGNED;
-static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_32BYTE_ALIGNED;
+static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_ETH_RAM MG_32BYTE_ALIGNED;
-static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_32BYTE_ALIGNED;
+static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_ETH_RAM MG_32BYTE_ALIGNED;
 static struct mg_tcpip_if *s_ifp;  // MIP interface
 
 // fastest is 3 cycles (SUB + BNE) on a 3-stage pipeline or equivalent
@@ -164,7 +160,7 @@ static bool mg_tcpip_driver_ra_init(struct mg_tcpip_if *ifp) {
 
   MG_DEBUG(("PHY addr: %d, smispin: %d", d->phy_addr, s_smispin));
   struct mg_phy phy = {raeth_read_phy, raeth_write_phy};
-  mg_phy_init(&phy, d->phy_addr, 0);  // MAC clocks PHY
+  mg_phy_init(&phy, d->phy_addr, MG_PHY_CLOCKS_MAC);
 
   // Select RMII mode,
   ETHERC->ECMR = MG_BIT(2) | MG_BIT(1);  // 100M, Full-duplex, CRC

src/drivers/rw612.c

@@ -26,17 +26,17 @@ struct ENET_Type {
       CHANNEL_TCSR[4], CHANNEL_TCCR[4];
 };
 
+#undef ENET
 #define ENET ((struct ENET_Type *) 0x40138000)
 
 #define ETH_PKT_SIZE 1536  // Max frame size
 #define ETH_DESC_CNT 4     // Descriptors count
 #define ETH_DS 2           // Descriptor size (words)
 
-#define MG_8BYTE_ALIGNED __attribute__((aligned((8U))))
+static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_ETH_RAM MG_8BYTE_ALIGNED;
-static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_8BYTE_ALIGNED;
+static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_ETH_RAM MG_8BYTE_ALIGNED;
-static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_8BYTE_ALIGNED;
+static uint32_t s_rxdesc[ETH_DESC_CNT][ETH_DS] MG_ETH_RAM MG_8BYTE_ALIGNED;
-static uint32_t s_rxdesc[ETH_DESC_CNT][ETH_DS] MG_8BYTE_ALIGNED;
+static uint32_t s_txdesc[ETH_DESC_CNT][ETH_DS] MG_ETH_RAM MG_8BYTE_ALIGNED;
-static uint32_t s_txdesc[ETH_DESC_CNT][ETH_DS] MG_8BYTE_ALIGNED;
 static uint8_t s_txno;  // Current TX descriptor
 static uint8_t s_rxno;  // Current RX descriptor
 

src/drivers/st67w6.c

@@ -0,0 +1,525 @@
+#include "st67w6.h"
+#include "net.h"
+
+#if MG_ENABLE_TCPIP && defined(MG_ENABLE_DRIVER_ST67W6) && \
+    MG_ENABLE_DRIVER_ST67W6
+
+static struct mg_tcpip_if *s_ifp;
+static uint32_t s_ip, s_mask;
+static bool s_link = false, s_connecting = false;
+
+static void wifi_cb(struct mg_tcpip_if *ifp, int ev, void *ev_data) {
+  struct mg_wifi_data *wifi =
+      &((struct mg_tcpip_driver_st67w6_data *) ifp->driver_data)->wifi;
+  if (wifi->apmode && ev == MG_TCPIP_EV_ST_CHG &&
+      *(uint8_t *) ev_data == MG_TCPIP_STATE_UP) {
+    MG_DEBUG(("Access Point started"));
+    s_ip = ifp->ip, ifp->ip = wifi->apip;
+    s_mask = ifp->mask, ifp->mask = wifi->apmask;
+    ifp->enable_dhcp_client = false;
+    ifp->enable_dhcp_server = true;
+  }
+}
+
+static bool st67w6_init(uint8_t *mac);
+static void st67w6_poll(bool is_at);
+
+static bool mg_tcpip_driver_st67w6_init(struct mg_tcpip_if *ifp) {
+  struct mg_tcpip_driver_st67w6_data *d =
+      (struct mg_tcpip_driver_st67w6_data *) ifp->driver_data;
+  struct mg_wifi_data *wifi = &d->wifi;
+  if (MG_BIG_ENDIAN) {
+    MG_ERROR(("Big-endian host"));
+    return false;
+  }
+  if (d->is_ready == NULL) return false;
+  s_ifp = ifp;
+  s_ip = ifp->ip;
+  s_mask = ifp->mask;
+  s_link = false;
+  ifp->pfn = wifi_cb;
+  if (!st67w6_init(ifp->mac)) return false;
+
+  if (d->send_queue.size == 0) d->send_queue.size = 8192;
+  d->send_queue.buf = (char *) mg_calloc(1, d->send_queue.size);
+  if (d->send_queue.buf == NULL) {
+    MG_ERROR(("OOM"));
+    return false;
+  }
+
+  if (wifi->apmode) {
+    return mg_wifi_ap_start(wifi);
+  } else if (wifi->ssid != NULL && wifi->pass != NULL) {
+    return mg_wifi_connect(wifi);
+  }
+  return true;
+}
+
+// Decouple; module access depends on it being RDY. See st67w6_poll()
+size_t mg_tcpip_driver_st67w6_output(const void *buf, size_t len,
+                                     struct mg_tcpip_if *ifp) {
+  struct mg_tcpip_driver_st67w6_data *d =
+      (struct mg_tcpip_driver_st67w6_data *) ifp->driver_data;
+  char *p;
+  if (mg_queue_book(&d->send_queue, &p, len) < len) return 0;
+  memcpy(p, buf, len);
+  mg_queue_add(&d->send_queue, len);
+  return len;
+}
+
+static bool mg_tcpip_driver_st67w6_poll(struct mg_tcpip_if *ifp, bool s1) {
+  struct mg_tcpip_driver_st67w6_data *d =
+      (struct mg_tcpip_driver_st67w6_data *) ifp->driver_data;
+  if (d->is_ready == NULL) return false;
+  st67w6_poll(false);
+  if (!s1) return false;
+  return s_link;
+}
+
+struct mg_tcpip_driver mg_tcpip_driver_st67w6 = {
+    mg_tcpip_driver_st67w6_init, mg_tcpip_driver_st67w6_output, NULL,
+    mg_tcpip_driver_st67w6_poll};
+
+//  AT | STA | AP | HCI | OT
+// --------------------------
+//       framing             <-- includes rx stall indication
+// --------------------------
+//         SPI               <-- padded to 32-bit
+//
+// Transactions take place when the module signals RDY, 'tx' and 'write'
+// functions actually just write to memory
+// - AT: handles configuration and events (unsolicited +foo:). Responses may
+// come as:
+//   - 1 frame: just OK or ERROR
+//   - 2 frames: 1 text line each, a response and OK
+//   - 3 frames: 2 text lines: 1 frame with text and no CR/LF, 1 frame with
+//   binary and CR/LF, 1 text line with OK
+// - STA and AP contain plain Ethernet frames to/from the STA and AP networks,
+// respectively
+// - HCI: BLE stuff
+// - OT: ?
+
+#pragma pack(push, 1)
+// little endian
+
+struct spi_hdr {
+  uint16_t magic;
+  uint16_t len;
+  uint8_t vflags;  // version :2, rx_stall :1, flags :5
+  uint8_t type;
+  uint16_t reserved;
+};
+
+#define ST67W6_SPI_TYPE_AT 0
+#define ST67W6_SPI_TYPE_STA 1
+#define ST67W6_SPI_TYPE_AP 2
+#define ST67W6_SPI_TYPE_HCI 3
+#define ST67W6_SPI_TYPE_OT 4
+
+#pragma pack(pop)
+
+static uint32_t txdata[2048 / 4], rxdata[2048 / 4];
+static uint8_t at_resp[300];
+
+static bool s_at_ok, s_at_err;
+static size_t s_at_resp_len;
+static void st67w6_handle_wifi_evnt(char *, size_t len);
+static void st67w6_handle_scan_result(char *, size_t len);
+
+static size_t st67w6_spi_poll(uint8_t *write, uint8_t *read);
+static void st67w6_write(unsigned int f, void *data, uint16_t len);
+static void st67w6_update_hash_table(void);
+
+// High-level comm stuff
+
+static void st67w6_poll(bool is_at) {
+  struct mg_tcpip_driver_st67w6_data *d =
+      (struct mg_tcpip_driver_st67w6_data *) s_ifp->driver_data;
+  struct spi_hdr *h = (struct spi_hdr *) rxdata;
+  unsigned int type;
+  uint8_t *txsource = (uint8_t *) txdata;
+  if (s_ifp->update_mac_hash_table) {
+    // first call to _poll() is after _init(), so this is safe
+    st67w6_update_hash_table();
+    s_ifp->update_mac_hash_table = false;
+  }
+  if (!is_at) {  // send outstanding WLAN frames in the queue
+    char *buf;
+    size_t len;
+    // NOTE(): have traffic-dependent queues or queue traffic type with data
+    if ((len = mg_queue_next(&d->send_queue, &buf)) > 0) {
+      st67w6_write(d->wifi.apmode ? ST67W6_SPI_TYPE_AP : ST67W6_SPI_TYPE_STA,
+                   buf, (uint16_t) len);
+      mg_queue_del(&d->send_queue, len);
+    } else {  // nothing to send
+      txsource = NULL;
+    }
+  }
+  if (st67w6_spi_poll(txsource, (uint8_t *) rxdata) == 0) return;
+  if (h->len == 0) return;
+  type = h->type;
+  if (type == ST67W6_SPI_TYPE_AT) {
+    char *p = (char *) (h + 1);
+    size_t len = h->len;
+    if (len > 7 && strncmp(p, "+CWLAP:", 7) == 0) {  // scan result
+      st67w6_handle_scan_result(p + 7, len - 7);
+    } else if (len > 4 && strncmp(p, "+CW:", 4) == 0) {
+      st67w6_handle_wifi_evnt(p + 4, len - 4);
+    } else {
+      MG_VERBOSE(("AT partial: %.*s", (int) len, p));
+      if (s_at_resp_len + len >= sizeof(at_resp))
+        s_at_resp_len = 0;  // truncate response, error will be caught later
+      memcpy(at_resp + s_at_resp_len, p, len);
+      s_at_resp_len += len;
+      if (mg_match(mg_str_n((char *) at_resp, s_at_resp_len),
+                   mg_str_n("*ERROR*", 7), NULL)) {
+        s_at_err = true;
+      } else if (mg_match(mg_str_n((char *) at_resp, s_at_resp_len),
+                          mg_str_n("*OK*", 4), NULL)) {
+        s_at_ok = true;
+      }
+    }
+  } else if (type == ST67W6_SPI_TYPE_STA || type == ST67W6_SPI_TYPE_AP) {
+    // WLAN frame reception
+    mg_tcpip_qwrite(h + 1, h->len, s_ifp);
+  }  // else silently discard
+}
+
+// WLAN event handling
+
+// - Do not call any AT functions here, otherwise revise st67w6_at_wait()
+// - The module likes to send ERROR along with other events
+static void st67w6_handle_wifi_evnt(char *p, size_t len) {
+  struct mg_str data[2];
+  MG_VERBOSE(("event: %.*s", (int) len, p));
+  if (len > 9 && strncmp(p, "CONNECTED", 9) == 0) {
+    s_link = true;
+    s_connecting = false;
+  } else if (len > 12 && strncmp(p, "DISCONNECTED", 12) == 0) {
+    s_link = false;
+    s_connecting = false;  // should not be needed
+  } else if (s_connecting && len > 6 &&
+             mg_match(mg_str_n(p, len), mg_str_n("ERROR,*\r\n*", 10), data)) {
+    size_t reason = 0;
+    bool ok = mg_to_size_t(data[0], &reason);
+    s_connecting = false;
+    MG_ERROR(("CONNECT FAILED"));
+    mg_tcpip_call(s_ifp, MG_TCPIP_EV_WIFI_CONNECT_ERR, ok ? &reason : NULL);
+  } else if (len > 9 && strncmp(p, "SCAN_DONE", 9) == 0) {
+    MG_VERBOSE(("scan complete"));
+    mg_tcpip_call(s_ifp, MG_TCPIP_EV_WIFI_SCAN_END, NULL);
+  }  // else silently discard: CONNECTING; STA_CONNECTED,"MAC";
+     // STA_DISCONNECTED,"MAC"; DIST_STA_IP,"MAC","IP"
+}
+
+static bool st67w6_at_cmd(char *cmd, size_t len);
+
+// Wi-Fi network stuff
+
+static bool st67w6_wifi_connect(char *ssid, char *pass) {
+  char cmd[90];  // ssid + pass + AT
+  size_t cmd_len;
+  if (!st67w6_at_cmd("AT+CWMODE=1,0\r\n", 15)) return false;
+  cmd_len = mg_snprintf(cmd, sizeof(cmd), "AT+CWJAP=\"%s\",\"%s\",,0\r\n", ssid,
+                        pass);  // takes >700ms
+  if (!st67w6_at_cmd(cmd, cmd_len)) return false;
+  st67w6_at_cmd("AT+CWRECONNCFG=0,0\r\n", 20);  // disregard error, connecting
+  s_connecting = true;
+  return true;
+}
+
+static bool st67w6_wifi_disconnect(void) {
+  s_connecting = false;
+  if (!st67w6_at_cmd("AT+CWQAP=0\r\n", 12)) return false;  // takes >800ms
+  return st67w6_at_cmd("AT+CWMODE=0,0\r\n", 15);           // takes >550ms
+}
+
+static bool st67w6_wifi_ap_start(char *ssid, char *pass, unsigned int channel) {
+  char cmd[90];  // ssid + pass + AT
+  size_t cmd_len;
+  if (!st67w6_at_cmd("AT+CWMODE=2,0\r\n", 15)) return false;  // takes >800ms
+  cmd_len = mg_snprintf(
+      cmd, sizeof(cmd), "AT+CWSAP=\"%s\",\"%s\",%u,3,2,0\r\n", ssid, pass,
+      channel);  // 3: WPA2_PSK; 2: max stations  // takes >350ms
+  s_link = true;
+  return st67w6_at_cmd(cmd, cmd_len);
+}
+
+static bool st67w6_wifi_ap_stop(void) {
+  s_link = false;
+  return st67w6_at_cmd("AT+CWMODE=0,0\r\n", 15);  // takes >550ms
+}
+
+// WLAN scan handling
+
+// +CWLAP:(security,"SSID",RSSI,"BSSID",channel,cipher,proto,wps)\r\n
+// security: OPEN, WEP, WPA, WPA2, WPA-WPA2, WPA-EAP, WPA3-SAE, WPA2-WPA3-SAE
+// cipher: NONE, WEP, AES/CCMP, TKIP, TKIP and AES/CCMP
+// proto: 4-bit bitmap AX,N,G,B; all set from right to left
+
+static bool st67w6_wifi_scan(void) {
+  return st67w6_at_cmd("AT+CWLAPOPT=1,1695,-100,255,50\r\n", 32) &&
+         st67w6_at_cmd("AT+CWLAP=0,,,0\r\n", 16);
+}
+
+static void st67w6_handle_scan_result(char *data, size_t len) {
+  struct mg_wifi_scan_bss_data bss;
+  struct mg_str fields[2];
+  char mac[6];
+  uint8_t val;
+  unsigned int i;
+  MG_VERBOSE(("scan result event: %.*s", (int) len, data));
+  ++data, --len;  // skip '('
+  if (!mg_span(mg_str_n(data, len), &fields[0], &fields[1], ',') ||
+      !mg_str_to_num(fields[0], 10, &val, 1))
+    return;
+  bss.security =
+      (val == 0) ? MG_WIFI_SECURITY_OPEN : (uint8_t) MG_WIFI_SECURITY_WEP;
+  if (val == 2 || val == 4) bss.security |= MG_WIFI_SECURITY_WPA;
+  if (val == 3 || val == 4 || val == 7) bss.security |= MG_WIFI_SECURITY_WPA2;
+  if (val == 6 || val == 7) bss.security |= MG_WIFI_SECURITY_WPA3;
+  if (val == 5) bss.security |= MG_WIFI_SECURITY_WPA_ENTERPRISE;
+  if (!mg_span(fields[1], &fields[0], &fields[1], ',')) return;
+  bss.SSID.buf = fields[0].buf + 1, bss.SSID.len = fields[0].len - 2;
+  if (!mg_span(fields[1], &fields[0], &fields[1], ',')) return;
+  while (fields[0].buf[0] == ' ') ++fields[0].buf, --fields[0].len;
+  if (fields[0].buf[0] != '-') return;  // positive RSSI would be great
+  ++fields[0].buf, --fields[0].len;
+  if (!mg_str_to_num(fields[0], 10, &val, 1)) return;
+  bss.RSSI = (int8_t) - (int8_t) val;
+  if (!mg_span(fields[1], &fields[0], &fields[1], ',')) return;
+  if (fields[0].len < 19) return;
+  ++fields[0].buf, --fields[0].len;  // skip '"'
+  for (i = 0; i < 6; i++) {
+    struct mg_str str;
+    str.buf = fields[0].buf + 3 * i;
+    str.len = 2;
+    if (!mg_str_to_num(str, 16, &mac[i], 1)) return;
+  }
+  bss.BSSID = mac;
+  if (!mg_span(fields[1], &fields[0], &fields[1], ',') ||
+      !mg_str_to_num(fields[0], 10, &bss.channel, 1))
+    return;
+  if (!mg_span(fields[1], &fields[0], &fields[1], ',') ||
+      !mg_str_to_num(fields[0], 10, &val, 1))
+    return;
+  // ignore cypher
+  if (!mg_span(fields[1], &fields[0], &fields[1], ',') ||
+      !mg_str_to_num(fields[0], 10, &val, 1))
+    return;
+  bss.has_n = (val & 4) != 0;
+  bss.has_ax = (val & 8) != 0;
+  bss.band = MG_WIFI_BAND_2G;  // NOT INFORMED with default options, no docs
+  MG_VERBOSE(("BSS: %.*s (%u) (%M) %d dBm %u", bss.SSID.len, bss.SSID.buf,
+              bss.channel, mg_print_mac, bss.BSSID, (int) bss.RSSI,
+              bss.security));
+  mg_tcpip_call(s_ifp, MG_TCPIP_EV_WIFI_SCAN_RESULT, &bss);
+}
+
+// AT stuff
+
+static inline bool delayms(unsigned int ms) {
+  mg_delayms(ms);
+  return true;
+}
+
+// send AT command, wait for a response or timeout, meanwhile delivering
+// received frames and events
+
+static bool st67w6_at_cmd(char *cmd, size_t len) {
+  bool is_at = true;
+  unsigned int times = 1000;
+  s_at_resp_len = 0;
+  st67w6_write(ST67W6_SPI_TYPE_AT, cmd, (uint16_t) len);
+  s_at_ok = false, s_at_err = false;
+  do {  // AT response processing does not call any other AT function
+    st67w6_poll(is_at);  // otherwise we can't allow them to pile up here
+    is_at = false;       // avoid repeating, allow queued WLAN frames to be sent
+    // network frames will be pushed to the queue so that is safe
+  } while (!s_at_ok && !s_at_err && times-- > 0 && delayms(1));
+  MG_VERBOSE(("AT response:\n%.*s", s_at_resp_len, at_resp));
+  MG_VERBOSE(("ok: %c, err: %c, times: %d", s_at_ok ? '1' : '0',
+              s_at_err ? '1' : '0', (int) times));
+  return s_at_ok;
+}
+
+static bool st67w6_spi_init(void);
+bool mg_to_size_t(struct mg_str str, size_t *val);
+
+static bool st67w6_init(uint8_t *mac) {
+  //  struct mg_tcpip_driver_st67w6_data *d = (struct
+  //  mg_tcpip_driver_st67w6_data *) s_ifp->driver_data;
+  struct mg_str data[3];
+  size_t val;
+  bool is_b = false;
+  if (!st67w6_spi_init()) return false;
+  if (!st67w6_at_cmd("AT\r\n", 4)) return false;
+  if (!st67w6_at_cmd("AT+CWNETMODE?\r\n", 15) ||
+      !mg_match(mg_str_n((char *) at_resp, s_at_resp_len),
+                mg_str_n("*:*\r\n*", 6), data) ||
+      !mg_to_size_t(data[1], &val))
+    return false;
+  if (val != 0) {
+    MG_ERROR(("Wrong firmware, T02 is needed"));
+    return false;
+  }
+  // set clock, who cares ???
+  if (!st67w6_at_cmd("AT+GET_CLOCK\r\n", 14)) return false;
+  MG_DEBUG(("%.*s", s_at_resp_len, at_resp));  // TODO(scaprile): --> VERBOSE
+  // BT-ENABLED DEPENDENCY
+
+  // MODULE DEPENDENCY
+  if (!st67w6_at_cmd("AT+EFUSE-R=24,\"0x100\"\r\n", 23) ||
+      !mg_match(mg_str_n((char *) at_resp, s_at_resp_len), mg_str_n("*,*", 3),
+                data))
+    return false;
+  if (data[1].buf[0] == 'C' && data[1].buf[1] == '6') is_b = true;
+  MG_DEBUG(("WLAN module is %sB type", is_b ? "" : "not"));  // --> VERBOSE
+  if (is_b) {
+    // Disable the antenna diversity pin
+    if (!st67w6_at_cmd("AT+IORST=0\r\n", 12)) return false;
+    // Apparently they intend to disable some antenna ...
+    if (!st67w6_at_cmd("AT+CWANTENABLE?\r\n", 17)) return false;
+    MG_DEBUG(("%.*s", s_at_resp_len, at_resp));  // --> VERBOSE
+  }
+
+  // Do not set wake-up pin (AT+SLWKIO)
+  // Disable power save mode
+  // NOTE(scaprile): (no response if in hibernate mode, though I guess we
+  // wouldn't have reached this point in that case either)
+  if (!st67w6_at_cmd("AT+PWR=0\r\n", 12)) return false;
+  // set Wi-Fi
+  // set country code
+  if (!st67w6_at_cmd("AT+CWCOUNTRY=0,\"00\"\r\n", 21)) return false;
+#if 0
+	// set DTIM
+  if (!st67w6_at_cmd("AT+SLWKDTIM=1\r\n", 15)) return false;
+#endif
+  // Read only default MAC, ignore set bit count (data[6] & 0x3F). Custom MACs
+  // reside at @0x64 and 0x70
+  if (st67w6_at_cmd("AT+EFUSE-R=7,\"0x014\"\r\n", 22) &&
+      mg_match(mg_str_n((char *) at_resp, s_at_resp_len), mg_str_n("*,*", 3),
+               data)) {
+    int i;
+    for (i = 0; i < 6; i++) mac[i] = data[1].buf[5 - i];
+    MG_DEBUG(("MAC: %M", mg_print_mac, mac));
+  } else {
+    MG_ERROR(("read MAC failed"));
+  }
+  return true;
+}
+
+static void st67w6_update_hash_table(void) {
+  // TODO(): read database, rebuild hash table
+  //  uint32_t val = 0;
+  //  val = 1;
+  //  st67w6_at_iovar_set2_(0, "mcast_list", (uint8_t *) &val, sizeof(val),
+  //  (uint8_t *) mcast_addr, sizeof(mcast_addr)); mg_delayms(50);
+}
+
+// SPI specifics
+
+#define ST67W6_SPI_MAGIC 0x55AA
+// #define ST67W6_SPI_VERSION(x), IS_STALL, FLAGS(x), ...
+
+static const uint8_t idlehdr[sizeof(struct spi_hdr)] = {0xaa, 0x55, 0, 0,
+                                                        0,    0,    0, 0};
+
+static void st67w6_write(unsigned int f, void *data, uint16_t len) {
+  struct spi_hdr *h = (struct spi_hdr *) txdata;
+  h->magic = ST67W6_SPI_MAGIC;
+  h->type = (uint8_t) f;
+  h->vflags = 0;
+  h->len = len;
+  h->reserved = 0;
+  memmove(h + 1, data, len);
+}
+
+static size_t st67w6_spi_poll(uint8_t *write, uint8_t *read) {
+  struct mg_tcpip_driver_st67w6_data *d =
+      (struct mg_tcpip_driver_st67w6_data *) s_ifp->driver_data;
+  struct spi_hdr *th, *rh = (struct spi_hdr *) read;
+  struct mg_tcpip_spi_ *s = (struct mg_tcpip_spi_ *) d->spi;
+  size_t padded;
+  unsigned int times;
+
+  th = (write != NULL) ? (struct spi_hdr *) write : (struct spi_hdr *) idlehdr;
+  s->begin(s->spi);
+  times = 50;
+  while (times--) {
+    if (d->is_ready()) break;
+    if (times == 0) {
+      MG_ERROR(("RDY TIMEOUT"));
+      s->end(s->spi);
+      return 0;
+    }
+    mg_delayms(1);
+  }
+
+  padded = (th->len + 3) & ~3;
+  s->txn(s->spi, (uint8_t *) th, (uint8_t *) rh, sizeof(*th) + padded);
+  if (rh->magic == ST67W6_SPI_MAGIC && rh->len > padded) {
+    size_t remaining_padded = (rh->len - padded + 3) & ~3;
+    if (remaining_padded > (2048 - sizeof(*rh) - padded))
+      remaining_padded = 2048 - sizeof(*rh) - padded;
+    s->txn(s->spi, NULL, read + sizeof(*rh) + padded, remaining_padded);
+  }
+  times = 50;
+  while (times--) {
+    if (!d->is_ready()) break;
+    if (times == 0) {
+      MG_ERROR(("!RDY TIMEOUT"));
+      break;
+    }
+    mg_delayms(1);
+  }
+  s->end(s->spi);
+  return (size_t) rh->len;
+}
+
+static bool st67w6_spi_init(void) {
+  struct mg_tcpip_driver_st67w6_data *d =
+      (struct mg_tcpip_driver_st67w6_data *) s_ifp->driver_data;
+  size_t len;
+  unsigned int times = 1000;
+  while (times--) {
+    if (d->is_ready()) break;
+    if (times == 0) return false;
+    mg_delayms(1);
+  }
+  if (((len = st67w6_spi_poll(NULL, (uint8_t *) rxdata)) == 0) ||
+      !mg_match(mg_str_n(((char *) rxdata) + sizeof(struct spi_hdr), len),
+                mg_str_n("*ready*", 7), NULL))
+    return false;
+  return true;
+}
+
+// Mongoose Wi-Fi API functions
+
+bool mg_wifi_scan(void) {
+  return st67w6_wifi_scan();
+}
+
+bool mg_wifi_connect(struct mg_wifi_data *wifi) {
+  s_ifp->ip = s_ip;
+  s_ifp->mask = s_mask;
+  if (s_ifp->ip == 0) s_ifp->enable_dhcp_client = true;
+  s_ifp->enable_dhcp_server = false;
+  MG_DEBUG(("Connecting to '%s'", wifi->ssid));
+  return st67w6_wifi_connect(wifi->ssid, wifi->pass);
+}
+
+bool mg_wifi_disconnect(void) {
+  return st67w6_wifi_disconnect();
+}
+
+bool mg_wifi_ap_start(struct mg_wifi_data *wifi) {
+  MG_DEBUG(("Starting AP '%s' (%u)", wifi->apssid, wifi->apchannel));
+  return st67w6_wifi_ap_start(wifi->apssid, wifi->appass, wifi->apchannel);
+}
+
+bool mg_wifi_ap_stop(void) {
+  return st67w6_wifi_ap_stop();
+}
+
+#endif

src/drivers/st67w6.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#if MG_ENABLE_TCPIP && defined(MG_ENABLE_DRIVER_ST67W6) && \
+    MG_ENABLE_DRIVER_ST67W6
+
+struct mg_tcpip_spi_ {
+  void *spi;              // Opaque SPI bus descriptor
+  void (*begin)(void *);  // SPI begin: slave select low
+  void (*end)(void *);    // SPI end: slave select high
+  void (*txn)(void *, uint8_t *, uint8_t *,
+              size_t len);  // SPI transaction: write-read len bytes
+};
+
+struct mg_tcpip_driver_st67w6_data {
+  struct mg_wifi_data wifi;
+  void *spi;
+  bool (*is_ready)(void);     // return state of module RDY pin
+  struct mg_queue send_queue; // decouple tx calls from module polls
+};
+
+#define MG_TCPIP_DRIVER_INIT(mgr)                                 \
+  do {                                                            \
+    static struct mg_tcpip_driver_st67w6_data driver_data_;       \
+    static struct mg_tcpip_if mif_;                               \
+    MG_SET_WIFI_CONFIG(&driver_data_);                            \
+    mif_.ip = MG_TCPIP_IP;                                        \
+    mif_.mask = MG_TCPIP_MASK;                                    \
+    mif_.gw = MG_TCPIP_GW;                                        \
+    mif_.driver = &mg_tcpip_driver_st67w6;                        \
+    mif_.driver_data = &driver_data_;                             \
+    mif_.recv_queue.size = 8192;                                  \
+    mif_.mac[0] = 2; /* MAC read from OTP at driver init */       \
+    mg_tcpip_init(mgr, &mif_);                                    \
+    MG_INFO(("Driver: st67w6, MAC: %M", mg_print_mac, mif_.mac)); \
+  } while (0)
+
+#endif

src/drivers/stm32f.c

@@ -22,10 +22,10 @@ struct stm32f_eth {
 #define ETH_DESC_CNT 4     // Descriptors count
 #define ETH_DS 4           // Descriptor size (words)
 
-static uint32_t s_rxdesc[ETH_DESC_CNT][ETH_DS];      // RX descriptors
+static uint32_t s_rxdesc[ETH_DESC_CNT][ETH_DS] MG_ETH_RAM;      // RX descriptors
-static uint32_t s_txdesc[ETH_DESC_CNT][ETH_DS];      // TX descriptors
+static uint32_t s_txdesc[ETH_DESC_CNT][ETH_DS] MG_ETH_RAM;      // TX descriptors
-static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE];  // RX ethernet buffers
+static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_ETH_RAM;  // RX ethernet buffers
-static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE];  // TX ethernet buffers
+static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_ETH_RAM;  // TX ethernet buffers
 static uint8_t s_txno;                               // Current TX descriptor
 static uint8_t s_rxno;                               // Current RX descriptor
 

src/drivers/stm32h.c

@@ -1,9 +1,28 @@
 #include "net_builtin.h"
 
-#if MG_ENABLE_TCPIP && (MG_ENABLE_DRIVER_STM32H || MG_ENABLE_DRIVER_MCXN)
+#if MG_ENABLE_TCPIP && (MG_ENABLE_DRIVER_STM32H || MG_ENABLE_DRIVER_MCXN || \
+                        MG_ENABLE_DRIVER_STM32N)
 // STM32H: vendor modded single-queue Synopsys v4.2
+// STM32N: dual-queue GbE Synopsys v5.2 with no hash table option, 64-bit AXI
 // MCXNx4x: dual-queue Synopsys v5.2 with no hash table option
-// RT1170 ENET_QOS: quad-queue Synopsys v5.1
+// RT1170: ENET_QOS: quad-queue Synopsys v5.1
+#if MG_ENABLE_DRIVER_STM32H
+#define SYNOPSYS_ENET_V5 0
+#define SYNOPSYS_ENET_SINGLEQ 1
+#define SYNOPSYS_ENET_NOHASHTABLE 0
+#define SYNOPSYS_ENET_GbE 0
+#elif MG_ENABLE_DRIVER_STM32N
+#define SYNOPSYS_ENET_V5 1
+#define SYNOPSYS_ENET_SINGLEQ 0
+#define SYNOPSYS_ENET_NOHASHTABLE 1
+#define SYNOPSYS_ENET_GbE 1
+#elif MG_ENABLE_DRIVER_MCXN
+#define SYNOPSYS_ENET_V5 1
+#define SYNOPSYS_ENET_SINGLEQ 0
+#define SYNOPSYS_ENET_NOHASHTABLE 1
+#define SYNOPSYS_ENET_GbE 0
+#endif
+
 struct synopsys_enet_qos {
   volatile uint32_t MACCR, MACECR, MACPFR, MACWTR, MACHT0R, MACHT1R,
       RESERVED1[14], MACVTR, RESERVED2, MACVHTR, RESERVED3, MACVIR, MACIVIR,
@@ -36,9 +55,9 @@ struct synopsys_enet_qos {
 };
 #undef ETH
 #if MG_ENABLE_DRIVER_STM32H
-#define ETH                                                                \
+#define ETH ((struct synopsys_enet_qos *) (uintptr_t) 0x40028000UL)
-  ((struct synopsys_enet_qos *) (uintptr_t) (0x40000000UL + 0x00020000UL + \
+#elif MG_ENABLE_DRIVER_STM32N
-                                             0x8000UL))
+#define ETH ((struct synopsys_enet_qos *) (uintptr_t) 0x48036000UL)
 #elif MG_ENABLE_DRIVER_MCXN
 #define ETH ((struct synopsys_enet_qos *) (uintptr_t) 0x40100000UL)
 #endif
@@ -47,11 +66,74 @@ struct synopsys_enet_qos {
 #define ETH_DESC_CNT 4     // Descriptors count
 #define ETH_DS 4           // Descriptor size (words)
 
-static volatile uint32_t s_rxdesc[ETH_DESC_CNT][ETH_DS];  // RX descriptors
+#if MG_ENABLE_DRIVER_STM32H || MG_ENABLE_DRIVER_STM32N
-static volatile uint32_t s_txdesc[ETH_DESC_CNT][ETH_DS];  // TX descriptors
+#define CACHE_LINESZ 32  // must be a whole number of (d)words (see DESC_SZW)
-static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE];       // RX ethernet buffers
+#ifndef SCB
-static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE];       // TX ethernet buffers
+struct m7_scb {
-static struct mg_tcpip_if *s_ifp;                         // MIP interface
+  volatile uint32_t CPUID, RESERVED1[4], CCR, RESERVED2[145], DCIMVAC, DCISW,
+      DCCMVAU, DCCMVAC, DCCSW, DCCIMVAC, DCCISW, RESERVED3[10], CACR,
+      RESERVED4[3];
+};
+#define SCB ((struct m7_scb *) (uintptr_t) 0xE000ED00UL)
+#endif
+// ending ISB is not needed because we don't cache instructions in data space
+static inline void MG_CACHE_INVAL(uint8_t *addr, int32_t len) {
+#if MG_ENABLE_DRIVER_STM32H
+  if ((SCB->CPUID & 0xfff0) != 0xc270) return;  // not a Cortex-M7 => not an H7
+#endif
+  if ((SCB->CCR & MG_BIT(16)) == 0) return;     // cache not enabled
+  MG_DSB();
+  while (len > 0) {
+    SCB->DCIMVAC = (uint32_t) addr;
+    addr += CACHE_LINESZ;
+    len -= CACHE_LINESZ;
+  }
+  MG_DSB();
+}
+static inline void MG_CACHE_FLUSH(uint8_t *addr, int32_t len) {
+#if MG_ENABLE_DRIVER_STM32H
+  if ((SCB->CPUID & 0xfff0) != 0xc270) return;  // not a Cortex-M7 => not an H7
+#endif
+  if ((SCB->CCR & MG_BIT(16)) == 0) return;     // cache not enabled
+  MG_DSB();
+  while (len > 0) {
+    SCB->DCCMVAC = (uint32_t) addr;
+    addr += CACHE_LINESZ;
+    len -= CACHE_LINESZ;
+  }
+  MG_DSB();
+}
+#define ETH_RAM_ALIGNED MG_32BYTE_ALIGNED  // depends on CACHE_LINESZ and ETH
+#define CACHE_ALIGN(x) \
+  ((((size_t) (x)) + CACHE_LINESZ - 1) & ~(CACHE_LINESZ - 1))
+#define DESC_SZ CACHE_ALIGN(4 * ETH_DS)  // grow descriptors to fit a line
+#define DESC_SZW (DESC_SZ / 4)
+#define BUFF_SZ CACHE_ALIGN(ETH_PKT_SIZE)  // grow buffers to fit n lines
+#if MG_ENABLE_DRIVER_STM32H
+#define DESC_SKIPW (DESC_SZW - ETH_DS)  // tell DMA the descriptor size, words
+#else
+// MG_ENABLE_DRIVER_STM32N, DMA is AXI and specs skip in 64-bit double-words
+#define DESC_SKIPW ((DESC_SZW - ETH_DS) / 2)
+#endif
+#else
+#define MG_CACHE_FLUSH(a, b)
+#define MG_CACHE_INVAL(a, b)
+#define ETH_RAM_ALIGNED MG_8BYTE_ALIGNED  // depends on ETH DMA alone
+#define DESC_SZ 0
+#define DESC_SZW ETH_DS
+#define BUFF_SZ ETH_PKT_SIZE
+#define DESC_SKIPW 0  // no need to skip, as we're not aligning to cache lines
+#endif
+
+// array[rows][cols] = coldata coldata ... for all rows, keeps alignment
+static volatile uint32_t s_rxdesc[ETH_DESC_CNT][DESC_SZW] MG_ETH_RAM
+    ETH_RAM_ALIGNED;
+static volatile uint32_t s_txdesc[ETH_DESC_CNT][DESC_SZW] MG_ETH_RAM
+    ETH_RAM_ALIGNED;
+static uint8_t s_rxbuf[ETH_DESC_CNT][BUFF_SZ] MG_ETH_RAM ETH_RAM_ALIGNED;
+static uint8_t s_txbuf[ETH_DESC_CNT][BUFF_SZ] MG_ETH_RAM ETH_RAM_ALIGNED;
+
+static struct mg_tcpip_if *s_ifp;  // MIP interface
 
 static uint16_t eth_read_phy(uint8_t addr, uint8_t reg) {
   ETH->MACMDIOAR &= (0xF << 8);
@@ -77,15 +159,19 @@ static bool mg_tcpip_driver_stm32h_init(struct mg_tcpip_if *ifp) {
   uint8_t phy_conf = d == NULL ? MG_PHY_CLOCKS_MAC : d->phy_conf;
 
   // Init RX descriptors
+  memset((char *) s_rxdesc, 0, sizeof(s_rxdesc));  // manual init
   for (int i = 0; i < ETH_DESC_CNT; i++) {
     s_rxdesc[i][0] = (uint32_t) (uintptr_t) s_rxbuf[i];  // Point to data buffer
     s_rxdesc[i][3] = MG_BIT(31) | MG_BIT(30) | MG_BIT(24);  // OWN, IOC, BUF1V
   }
+  MG_CACHE_FLUSH((uint8_t *) s_rxdesc, sizeof(s_rxdesc));
 
   // Init TX descriptors
+  memset((char *) s_txdesc, 0, sizeof(s_txdesc));  // manual init
   for (int i = 0; i < ETH_DESC_CNT; i++) {
     s_txdesc[i][0] = (uint32_t) (uintptr_t) s_txbuf[i];  // Buf pointer
   }
+  MG_CACHE_FLUSH((uint8_t *) s_txdesc, sizeof(s_txdesc));
 
   ETH->DMAMR |= MG_BIT(0);  // Software reset
   for (int i = 0; i < 4; i++)
@@ -102,7 +188,7 @@ static bool mg_tcpip_driver_stm32h_init(struct mg_tcpip_if *ifp) {
   ETH->DMASBMR |= MG_BIT(12);  // AAL NOTE(scaprile): is this actually needed
   ETH->MACIER = 0;  // Do not enable additional irq sources (reset value)
   ETH->MACTFCR = MG_BIT(7);  // Disable zero-quanta pause
-#if !MG_ENABLE_DRIVER_MCXN
+#if !SYNOPSYS_ENET_V5
   ETH->MACPFR = MG_BIT(10);  // Perfect filtering
 #endif
   struct mg_phy phy = {eth_read_phy, eth_write_phy};
@@ -118,15 +204,15 @@ static bool mg_tcpip_driver_stm32h_init(struct mg_tcpip_if *ifp) {
   ETH->DMACTDRLR = ETH_DESC_CNT - 1;    // ring length
   ETH->DMACTDTPR =
       (uint32_t) (uintptr_t) s_txdesc;  // first available descriptor address
-  ETH->DMACCR = 0;  // DSL = 0 (contiguous descriptor table) (reset value)
+  ETH->DMACCR = DESC_SKIPW << 18;  // DSL (contiguous/sparse descriptor table)
-#if !MG_ENABLE_DRIVER_STM32H
+#if SYNOPSYS_ENET_V5
   MG_SET_BITS(ETH->DMACTCR, 0x3F << 16, MG_BIT(16));
   MG_SET_BITS(ETH->DMACRCR, 0x3F << 16, MG_BIT(16));
 #endif
   ETH->DMACIER = MG_BIT(6) | MG_BIT(15);  // RIE, NIE
   ETH->MACCR = MG_BIT(0) | MG_BIT(1) | MG_BIT(13) | MG_BIT(14) |
-               MG_BIT(15);  // RE, TE, Duplex, Fast, Reserved
+               MG_BIT(15);  // RE, TE, Duplex, Fast, (10/100)/Reserved
-#if MG_ENABLE_DRIVER_STM32H
+#if SYNOPSYS_ENET_SINGLEQ
   ETH->MTLTQOMR |= MG_BIT(1);  // TSF
   ETH->MTLRQOMR |= MG_BIT(5);  // RSF
 #else
@@ -150,18 +236,23 @@ static size_t mg_tcpip_driver_stm32h_tx(const void *buf, size_t len,
                                         struct mg_tcpip_if *ifp) {
   if (len > sizeof(s_txbuf[s_txno])) {
     MG_ERROR(("Frame too big, %ld", (long) len));
-    len = 0;  // Frame is too big
+    return 0;  // Frame is too big
-  } else if ((s_txdesc[s_txno][3] & MG_BIT(31))) {
+  }
+  MG_CACHE_INVAL((uint8_t *) &s_txdesc[s_txno], DESC_SZ);
+  if ((s_txdesc[s_txno][3] & MG_BIT(31))) {
     ifp->nerr++;
     MG_ERROR(("No free descriptors: %u %08X %08X %08X", s_txno,
               s_txdesc[s_txno][3], ETH->DMACSR, ETH->DMACTCR));
+    MG_CACHE_INVAL((uint8_t *) s_txdesc, sizeof(s_txdesc));
     for (int i = 0; i < ETH_DESC_CNT; i++) MG_ERROR(("%08X", s_txdesc[i][3]));
     len = 0;  // All descriptors are busy, fail
   } else {
-    memcpy(s_txbuf[s_txno], buf, len);              // Copy data
+    memcpy(s_txbuf[s_txno], buf, len);  // Copy data
+    MG_CACHE_FLUSH((uint8_t *) &s_txbuf[s_txno], BUFF_SZ);
     s_txdesc[s_txno][2] = (uint32_t) len;           // Set data len
     s_txdesc[s_txno][3] = MG_BIT(28) | MG_BIT(29);  // FD, LD
     s_txdesc[s_txno][3] |= MG_BIT(31);  // Set OWN bit - let DMA take over
+    MG_CACHE_FLUSH((uint8_t *) &s_txdesc[s_txno], DESC_SZ);
     if (++s_txno >= ETH_DESC_CNT) s_txno = 0;
   }
   ETH->DMACSR |= MG_BIT(2) | MG_BIT(1);  // Clear any prior TBU, TPS
@@ -171,7 +262,7 @@ static size_t mg_tcpip_driver_stm32h_tx(const void *buf, size_t len,
 }
 
 static void mg_tcpip_driver_stm32h_update_hash_table(struct mg_tcpip_if *ifp) {
-#if MG_ENABLE_DRIVER_MCXN
+#if SYNOPSYS_ENET_NOHASHTABLE
   ETH->MACPFR = MG_BIT(4);  // Pass Multicast (pass all multicast frames)
 #else
   // TODO(): read database, rebuild hash table
@@ -182,7 +273,7 @@ static void mg_tcpip_driver_stm32h_update_hash_table(struct mg_tcpip_if *ifp) {
   ETH->MACA1HR = (uint32_t) mcast_addr[5] << 8 | (uint32_t) mcast_addr[4];
   ETH->MACA1HR |= MG_BIT(31);  // AE
 #endif
-(void) ifp;
+  (void) ifp;
 }
 
 static bool mg_tcpip_driver_stm32h_poll(struct mg_tcpip_if *ifp, bool s1) {
@@ -203,8 +294,11 @@ static bool mg_tcpip_driver_stm32h_poll(struct mg_tcpip_if *ifp, bool s1) {
     // if(link is slow or half) set flags otherwise
     // reg = tmp
     uint32_t maccr = ETH->MACCR | MG_BIT(14) | MG_BIT(13);  // 100M, Full-duplex
-    if (speed == MG_PHY_SPEED_10M) maccr &= ~MG_BIT(14);    // 10M
+#if SYNOPSYS_ENET_GbE
-    if (full_duplex == false) maccr &= ~MG_BIT(13);         // Half-duplex
+    if (speed == MG_PHY_SPEED_1000M) maccr &= ~MG_BIT(15);  // 1000M
+#endif
+    if (speed == MG_PHY_SPEED_10M) maccr &= ~MG_BIT(14);  // 10M
+    if (full_duplex == false) maccr &= ~MG_BIT(13);       // Half-duplex
     ETH->MACCR = maccr;  // IRQ handler does not fiddle with this register
     MG_DEBUG(("Link is %uM %s-duplex", maccr & MG_BIT(14) ? 100 : 10,
               maccr & MG_BIT(13) ? "full" : "half"));
@@ -216,13 +310,17 @@ static uint32_t s_rxno;
 #if MG_ENABLE_DRIVER_MCXN
 void ETHERNET_IRQHandler(void);
 void ETHERNET_IRQHandler(void) {
-#else
+#elif MG_ENABLE_DRIVER_STM32H
 void ETH_IRQHandler(void);
 void ETH_IRQHandler(void) {
+#else
+void ETH1_IRQHandler(void);
+void ETH1_IRQHandler(void) {
 #endif
   if (ETH->DMACSR & MG_BIT(6)) {           // Frame received, loop
     ETH->DMACSR = MG_BIT(15) | MG_BIT(6);  // Clear flag
     for (uint32_t i = 0; i < 10; i++) {  // read as they arrive but not forever
+      MG_CACHE_INVAL((uint8_t *) &s_rxdesc[s_rxno], DESC_SZ);
       if (s_rxdesc[s_rxno][3] & MG_BIT(31)) break;  // exit when done
       if (((s_rxdesc[s_rxno][3] & (MG_BIT(28) | MG_BIT(29))) ==
            (MG_BIT(28) | MG_BIT(29))) &&
@@ -230,10 +328,12 @@ void ETH_IRQHandler(void) {
         uint32_t len = s_rxdesc[s_rxno][3] & (MG_BIT(15) - 1);
         // MG_DEBUG(("%lx %lu %lx %08lx", s_rxno, len, s_rxdesc[s_rxno][3],
         // ETH->DMACSR));
+        MG_CACHE_INVAL((uint8_t *) &s_rxbuf[s_rxno], BUFF_SZ);
         mg_tcpip_qwrite(s_rxbuf[s_rxno], len > 4 ? len - 4 : len, s_ifp);
       }
       s_rxdesc[s_rxno][3] =
           MG_BIT(31) | MG_BIT(30) | MG_BIT(24);  // OWN, IOC, BUF1V
+      MG_CACHE_FLUSH((uint8_t *) &s_rxdesc[s_rxno], DESC_SZ);
       if (++s_rxno >= ETH_DESC_CNT) s_rxno = 0;
     }
   }

src/drivers/stm32h.h

@@ -7,7 +7,10 @@
 #if !defined(MG_ENABLE_DRIVER_MCXN)
 #define MG_ENABLE_DRIVER_MCXN 0
 #endif
-#if MG_ENABLE_DRIVER_STM32H || MG_ENABLE_DRIVER_MCXN
+#if !defined(MG_ENABLE_DRIVER_STM32N)
+#define MG_ENABLE_DRIVER_STM32N 0
+#endif
+#if MG_ENABLE_DRIVER_STM32H || MG_ENABLE_DRIVER_MCXN || MG_ENABLE_DRIVER_STM32N
 
 struct mg_tcpip_driver_stm32h_data {
   // MDC clock divider. MDC clock is derived from HCLK, must not exceed 2.5MHz
@@ -46,6 +49,18 @@ struct mg_tcpip_driver_stm32h_data {
 #define MG_ENABLE_ETH_IRQ()
 #endif
 
+#if MG_ENABLE_IPV6
+#define MG_IPV6_INIT(mif)                                         \
+  do {                                                            \
+    memcpy(mif.ip6ll, (uint8_t[16]) MG_TCPIP_IPV6_LINKLOCAL, 16);     \
+    memcpy(mif.ip6, (uint8_t[16]) MG_TCPIP_GLOBAL, 16);           \
+    memcpy(mif.gw6, (uint8_t[16]) MG_TCPIP_GW6, 16);              \
+    mif.prefix_len = MG_TCPIP_PREFIX_LEN;                        \
+  } while(0)
+#else
+#define MG_IPV6_INIT(mif)
+#endif
+
 #define MG_TCPIP_DRIVER_INIT(mgr)                                 \
   do {                                                            \
     static struct mg_tcpip_driver_stm32h_data driver_data_;       \
@@ -59,6 +74,7 @@ struct mg_tcpip_driver_stm32h_data {
     mif_.driver = &mg_tcpip_driver_stm32h;                        \
     mif_.driver_data = &driver_data_;                             \
     MG_SET_MAC_ADDRESS(mif_.mac);                                 \
+    MG_IPV6_INIT(mif_);                                           \
     mg_tcpip_init(mgr, &mif_);                                    \
     MG_ENABLE_ETH_IRQ();                                          \
     MG_INFO(("Driver: stm32h, MAC: %M", mg_print_mac, mif_.mac)); \

src/drivers/tm4c.c

@@ -111,11 +111,11 @@ static int guess_mdc_cr(void) {
   uint8_t crs[] = {2, 3, 0, 1};      // EMAC->MACMIIAR::CR values
   uint8_t div[] = {16, 26, 42, 62};  // Respective HCLK dividers
   uint32_t sysclk = get_sysclk();    // Guess system SYSCLK
-  int result = -1;                   // Invalid CR value
+  int i, result = -1;                // Invalid CR value
   if (sysclk < 25000000) {
     MG_ERROR(("SYSCLK too low"));
   } else {
-    for (int i = 0; i < 4; i++) {
+    for (i = 0; i < 4; i++) {
       if (sysclk / div[i] <= 2375000UL /* 2.5MHz - 5% */) {
         result = crs[i];
         break;
@@ -130,10 +130,11 @@ static int guess_mdc_cr(void) {
 static bool mg_tcpip_driver_tm4c_init(struct mg_tcpip_if *ifp) {
   struct mg_tcpip_driver_tm4c_data *d =
       (struct mg_tcpip_driver_tm4c_data *) ifp->driver_data;
+  int i;
   s_ifp = ifp;
 
   // Init RX descriptors
-  for (int i = 0; i < ETH_DESC_CNT; i++) {
+  for (i = 0; i < ETH_DESC_CNT; i++) {
     s_rxdesc[i][0] = MG_BIT(31);                         // Own
     s_rxdesc[i][1] = sizeof(s_rxbuf[i]) | MG_BIT(14);    // 2nd address chained
     s_rxdesc[i][2] = (uint32_t) (uintptr_t) s_rxbuf[i];  // Point to data buffer
@@ -143,7 +144,7 @@ static bool mg_tcpip_driver_tm4c_init(struct mg_tcpip_if *ifp) {
   }
 
   // Init TX descriptors
-  for (int i = 0; i < ETH_DESC_CNT; i++) {
+  for (i = 0; i < ETH_DESC_CNT; i++) {
     s_txdesc[i][2] = (uint32_t) (uintptr_t) s_txbuf[i];  // Buf pointer
     s_txdesc[i][3] =
         (uint32_t) (uintptr_t) s_txdesc[(i + 1) % ETH_DESC_CNT];  // Chain
@@ -204,7 +205,6 @@ static size_t mg_tcpip_driver_tm4c_tx(const void *buf, size_t len,
   EMAC->EMACDMARIS = MG_BIT(2) | MG_BIT(5);  // Clear any prior TU/UNF
   EMAC->EMACTXPOLLD = 0;                     // and resume
   return len;
-  (void) ifp;
 }
 
 static void mg_tcpip_driver_tm4c_update_hash_table(struct mg_tcpip_if *ifp) {
@@ -245,9 +245,10 @@ static bool mg_tcpip_driver_tm4c_poll(struct mg_tcpip_if *ifp, bool s1) {
 void EMAC0_IRQHandler(void);
 static uint32_t s_rxno;
 void EMAC0_IRQHandler(void) {
+  int i;
   if (EMAC->EMACDMARIS & MG_BIT(6)) {           // Frame received, loop
     EMAC->EMACDMARIS = MG_BIT(16) | MG_BIT(6);  // Clear flag
-    for (uint32_t i = 0; i < 10; i++) {  // read as they arrive but not forever
+    for (i = 0; i < 10; i++) {  // read as they arrive but not forever
       if (s_rxdesc[s_rxno][0] & MG_BIT(31)) break;  // exit when done
       if (((s_rxdesc[s_rxno][0] & (MG_BIT(8) | MG_BIT(9))) ==
            (MG_BIT(8) | MG_BIT(9))) &&

src/drivers/xmc.c

@@ -35,18 +35,12 @@ struct ETH_GLOBAL_TypeDef {
 #define ETH_DESC_CNT 4     // Descriptors count
 #define ETH_DS 4           // Descriptor size (words)
 
-#ifndef ETH_RAM_SECTION
+static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_ETH_RAM;
-// if no section is specified, then the data will be placed in the default
+static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_ETH_RAM;
-// bss section
-#define ETH_RAM_SECTION
-#endif
-
-static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE] ETH_RAM_SECTION;
-static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE] ETH_RAM_SECTION;
 static uint32_t s_rxdesc[ETH_DESC_CNT]
-                        [ETH_DS] ETH_RAM_SECTION;  // RX descriptors
+                        [ETH_DS] MG_ETH_RAM;  // RX descriptors
 static uint32_t s_txdesc[ETH_DESC_CNT]
-                        [ETH_DS] ETH_RAM_SECTION;  // TX descriptors
+                        [ETH_DS] MG_ETH_RAM;  // TX descriptors
 static uint8_t s_txno;                             // Current TX descriptor
 static uint8_t s_rxno;                             // Current RX descriptor
 

src/drivers/xmc7.c

@@ -59,15 +59,12 @@ struct ETH_Type {
 #define ETH_DESC_CNT 4     // Descriptors count
 #define ETH_DS 2           // Descriptor size (words)
 
-// TODO(): handle these in a portable compiler-independent CMSIS-friendly way
+static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_ETH_RAM;
-#define MG_8BYTE_ALIGNED __attribute__((aligned((8U))))
+static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE] MG_ETH_RAM;
-
+static uint32_t s_rxdesc[ETH_DESC_CNT][ETH_DS] MG_ETH_RAM MG_8BYTE_ALIGNED;
-static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE];
+static uint32_t s_txdesc[ETH_DESC_CNT][ETH_DS] MG_ETH_RAM MG_8BYTE_ALIGNED;
-static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE];
+static uint8_t s_txno;  // Current TX descriptor
-static uint32_t s_rxdesc[ETH_DESC_CNT][ETH_DS] MG_8BYTE_ALIGNED;
+static uint8_t s_rxno;  // Current RX descriptor
-static uint32_t s_txdesc[ETH_DESC_CNT][ETH_DS] MG_8BYTE_ALIGNED;
-static uint8_t s_txno MG_8BYTE_ALIGNED;  // Current TX descriptor
-static uint8_t s_rxno MG_8BYTE_ALIGNED;  // Current RX descriptor
 
 static struct mg_tcpip_if *s_ifp;  // MIP interface
 enum { MG_PHY_ADDR = 0, MG_PHYREG_BCR = 0, MG_PHYREG_BSR = 1 };

src/event.h

@@ -27,5 +27,7 @@ enum {
   MG_EV_MQTT_OPEN,  // MQTT CONNACK received        int *connack_status_code
   MG_EV_SNTP_TIME,  // SNTP time received           uint64_t *epoch_millis
   MG_EV_WAKEUP,     // mg_wakeup() data received    struct mg_str *data
+  MG_EV_MDNS_REQ,   // mDNS request                 struct mg_mdns_req *
+  MG_EV_MDNS_RESP,  // mDNS response                struct mg_mdns_resp *
   MG_EV_USER        // Starting ID for user events
 };

src/fmt.c

@@ -22,7 +22,8 @@ static int xisinf(double x) {
   union {
     double f;
     uint64_t u;
-  } ieee754 = {x};
+  } ieee754;
+  ieee754.f = x;
   return ((unsigned) (ieee754.u >> 32) & 0x7fffffff) == 0x7ff00000 &&
          ((unsigned) ieee754.u == 0);
 }
@@ -31,7 +32,8 @@ static int xisnan(double x) {
   union {
     double f;
     uint64_t u;
-  } ieee754 = {x};
+  } ieee754;
+  ieee754.f = x;
   return ((unsigned) (ieee754.u >> 32) & 0x7fffffff) +
              ((unsigned) ieee754.u != 0) >
          0x7ff00000;
@@ -99,7 +101,7 @@ static size_t mg_dtoa(char *dst, size_t dstlen, double d, int width, bool tz) {
   }
 
   while (tz && n > 0 && buf[s + n - 1] == '0') n--;  // Trim trailing zeroes
-  if (tz && n > 0 && buf[s + n - 1] == '.') n--;           // Trim trailing dot
+  if (tz && n > 0 && buf[s + n - 1] == '.') n--;     // Trim trailing dot
   n += s;
   if (n >= (int) sizeof(buf)) n = (int) sizeof(buf) - 1;
   buf[n] = '\0';
@@ -129,7 +131,7 @@ static size_t mg_lld(char *buf, int64_t val, bool is_signed, bool is_hex) {
 }
 
 static size_t scpy(void (*out)(char, void *), void *ptr, char *buf,
-                          size_t len) {
+                   size_t len) {
   size_t i = 0;
   while (i < len && buf[i] != '\0') out(buf[i++], ptr);
   return i;

src/fs.c

@@ -86,7 +86,8 @@ static void mg_fs_ls_fn(const char *filename, void *param) {
 }
 
 bool mg_fs_ls(struct mg_fs *fs, const char *path, char *buf, size_t len) {
-  struct mg_str s = {buf, len};
+  struct mg_str s;
+  s.buf = buf, s.len = len;
   fs->ls(path, mg_fs_ls_fn, &s);
   return buf[0] != '\0';
 }

src/http.c

@@ -1,7 +1,7 @@
+#include "http.h"
 #include "arch.h"
 #include "base64.h"
 #include "fmt.h"
-#include "http.h"
 #include "json.h"
 #include "log.h"
 #include "net.h"
@@ -237,6 +237,8 @@ static const char *skiptorn(const char *s, const char *end, struct mg_str *v) {
 static bool mg_http_parse_headers(const char *s, const char *end,
                                   struct mg_http_header *h, size_t max_hdrs) {
   size_t i, n;
+  int cl_count = 0, te_count = 0, auth_count = 0;
+  int conn_count = 0, cookie_count = 0;
   for (i = 0; i < max_hdrs; i++) {
     struct mg_str k = {NULL, 0}, v = {NULL, 0};
     if (s >= end) return false;
@@ -252,6 +254,13 @@ static bool mg_http_parse_headers(const char *s, const char *end,
     while (v.len > 0 && (v.buf[v.len - 1] == ' ' || v.buf[v.len - 1] == '\t')) {
       v.len--;  // Trim spaces
     }
+    // detect duplicated headers -> discard
+    if (((mg_strcasecmp(k, mg_str("Content-Length")) == 0) && (++cl_count > 1)) ||
+      ((mg_strcasecmp(k, mg_str("Transfer-Encoding")) == 0) && (++te_count > 1)) ||
+      ((mg_strcasecmp(k, mg_str("Authorization")) == 0) && (++auth_count > 1)) ||
+      ((mg_strcasecmp(k, mg_str("Cookie")) == 0) && (++cookie_count > 1)) ||
+      ((mg_strcasecmp(k, mg_str("Connection")) == 0) && (++conn_count > 1)))
+      return false;
     // MG_INFO(("--HH [%.*s] [%.*s]", (int) k.len, k.buf, (int) v.len, v.buf));
     h[i].name = k, h[i].value = v;  // Success. Assign values
   }
@@ -286,6 +295,8 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
   // If we're given a version, check that it is HTTP/x.x
   version_prefix_valid =
       hm->proto.len > 5 && (mg_ncasecmp(hm->proto.buf, "HTTP/", 5) == 0);
+  if (!is_response && !version_prefix_valid)
+    return -1; // no version detected in request
   if (!is_response && hm->proto.len > 0 &&
       (!version_prefix_valid || hm->proto.len != 8 ||
        (hm->proto.buf[5] < '0' || hm->proto.buf[5] > '9') ||
@@ -317,17 +328,9 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
   // responses. If HTTP response does not have Content-Length set, then
   // body is read until socket is closed, i.e. body.len is infinite (~0).
   //
-  // For HTTP requests though, according to
+  // For HTTP requests though, if Content-Length is not specified
-  // http://tools.ietf.org/html/rfc7231#section-8.1.3,
+  // set body length to 0.
-  // only POST and PUT methods have defined body semantics.
+  if (hm->body.len == (size_t) ~0 && !is_response) {
-  // Therefore, if Content-Length is not specified and methods are
-  // not one of PUT or POST, set body length to 0.
-  //
-  // So, if it is HTTP request, and Content-Length is not set,
-  // and method is not (PUT or POST) then reset body length to zero.
-  if (hm->body.len == (size_t) ~0 && !is_response &&
-      mg_strcasecmp(hm->method, mg_str("PUT")) != 0 &&
-      mg_strcasecmp(hm->method, mg_str("POST")) != 0) {
     hm->body.len = 0;
     hm->message.len = (size_t) req_len;
   }
@@ -346,14 +349,14 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
 static void mg_http_vprintf_chunk(struct mg_connection *c, const char *fmt,
                                   va_list *ap) {
   size_t len = c->send.len;
-  mg_send(c, "        \r\n", 10);
+  if (!mg_send(c, "        \r\n", 10)) mg_error(c, "OOM");
   mg_vxprintf(mg_pfn_iobuf, &c->send, fmt, ap);
   if (c->send.len >= len + 10) {
     mg_snprintf((char *) c->send.buf + len, 9, "%08lx", c->send.len - len - 10);
     c->send.buf[len + 8] = '\r';
     if (c->send.len == len + 10) c->is_resp = 0;  // Last chunk, reset marker
   }
-  mg_send(c, "\r\n", 2);
+  if (!mg_send(c, "\r\n", 2)) mg_error(c, "OOM");
 }
 
 void mg_http_printf_chunk(struct mg_connection *c, const char *fmt, ...) {
@@ -365,8 +368,7 @@ void mg_http_printf_chunk(struct mg_connection *c, const char *fmt, ...) {
 
 void mg_http_write_chunk(struct mg_connection *c, const char *buf, size_t len) {
   mg_printf(c, "%lx\r\n", (unsigned long) len);
-  mg_send(c, buf, len);
+  if (!mg_send(c, buf, len) || !mg_send(c, "\r\n", 2)) mg_error(c, "OOM");
-  mg_send(c, "\r\n", 2);
   if (len == 0) c->is_resp = 0;
 }
 
@@ -649,10 +651,10 @@ void mg_http_serve_file(struct mg_connection *c, struct mg_http_message *hm,
               status, mg_http_status_code_str(status), (int) mime.len, mime.buf,
               etag, (uint64_t) cl, gzip ? "Content-Encoding: gzip\r\n" : "",
               range, opts->extra_headers ? opts->extra_headers : "");
-    if (mg_strcasecmp(hm->method, mg_str("HEAD")) == 0) {
+    if (mg_strcasecmp(hm->method, mg_str("HEAD")) == 0 || c->is_closing) {
       c->is_resp = 0;
       mg_fs_close(fd);
-    } else {
+    } else { // start serving static content only if not closing, see #3354
       // Track to-be-sent content length at the end of c->data, aligned
       size_t *clp = (size_t *) &c->data[(sizeof(c->data) - sizeof(size_t)) /
                                         sizeof(size_t) * sizeof(size_t)];
@@ -1021,7 +1023,7 @@ static void http_cb(struct mg_connection *c, int ev, void *ev_data) {
       const char *buf = (char *) c->recv.buf + ofs;
       int n = mg_http_parse(buf, c->recv.len - ofs, &hm);
       struct mg_str *te;  // Transfer - encoding header
-      bool is_chunked = false;
+      bool is_chunked = false, is_http_1_0 = false;
       size_t old_len = c->recv.len;
       if (n < 0) {
         // We don't use mg_error() here, to avoid closing pipelined requests
@@ -1044,7 +1046,11 @@ static void http_cb(struct mg_connection *c, int ev, void *ev_data) {
         hm.message.len = c->recv.len - ofs;  // and closes now, deliver MSG
         hm.body.len = hm.message.len - (size_t) (hm.body.buf - hm.message.buf);
       }
-      if ((te = mg_http_get_header(&hm, "Transfer-Encoding")) != NULL) {
+      is_http_1_0 =
+          hm.proto.len > 8 && mg_ncasecmp(hm.proto.buf, "HTTP/1.0", 8) == 0;
+      // HTTP/1.0 does not use "Transfer-Encoding: chunked"
+      if (!is_http_1_0 &&
+          (te = mg_http_get_header(&hm, "Transfer-Encoding")) != NULL) {
         if (mg_strcasecmp(*te, mg_str("chunked")) == 0) {
           is_chunked = true;
         } else {
@@ -1059,9 +1065,10 @@ static void http_cb(struct mg_connection *c, int ev, void *ev_data) {
         if (!is_response && (mg_strcasecmp(hm.method, mg_str("POST")) == 0 ||
                              mg_strcasecmp(hm.method, mg_str("PUT")) == 0)) {
           // POST and PUT should include an entity body. Therefore, they should
-          // contain a Content-length header. Other requests can also contain a
+          // contain a Content-length header (unless the body length is 0, in
+          // which case it can be omitted). Other requests can also contain a
           // body, but their content has no defined semantics (RFC 7231)
-          require_content_len = true;
+          if (hm.body.len != 0) require_content_len = true;
           ofs += (size_t) n;  // this request has been processed
         } else if (is_response) {
           // HTTP spec 7.2 Entity body: All other responses must include a body

src/http.h

@@ -40,7 +40,6 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *);
 int mg_http_get_request_len(const unsigned char *buf, size_t buf_len);
 void mg_http_printf_chunk(struct mg_connection *cnn, const char *fmt, ...);
 void mg_http_write_chunk(struct mg_connection *c, const char *buf, size_t len);
-void mg_http_delete_chunk(struct mg_connection *c, struct mg_http_message *hm);
 struct mg_connection *mg_http_listen(struct mg_mgr *, const char *url,
                                      mg_event_handler_t fn, void *fn_data);
 struct mg_connection *mg_http_connect(struct mg_mgr *, const char *url,

src/iobuf.c

@@ -1,5 +1,5 @@
-#include "arch.h"
 #include "iobuf.h"
+#include "arch.h"
 #include "log.h"
 #include "util.h"
 
@@ -7,8 +7,8 @@ static size_t roundup(size_t size, size_t align) {
   return align == 0 ? size : (size + align - 1) / align * align;
 }
 
-int mg_iobuf_resize(struct mg_iobuf *io, size_t new_size) {
+bool mg_iobuf_resize(struct mg_iobuf *io, size_t new_size) {
-  int ok = 1;
+  bool ok = true;
   new_size = roundup(new_size, io->align);
   if (new_size == 0) {
     mg_bzero(io->buf, io->size);
@@ -25,15 +25,16 @@ int mg_iobuf_resize(struct mg_iobuf *io, size_t new_size) {
       mg_free(io->buf);
       io->buf = (unsigned char *) p;
       io->size = new_size;
+      io->len = len;
     } else {
-      ok = 0;
+      ok = false;
       MG_ERROR(("%lld->%lld", (uint64_t) io->size, (uint64_t) new_size));
     }
   }
   return ok;
 }
 
-int mg_iobuf_init(struct mg_iobuf *io, size_t size, size_t align) {
+bool mg_iobuf_init(struct mg_iobuf *io, size_t size, size_t align) {
   io->buf = NULL;
   io->align = align;
   io->size = io->len = 0;

src/iobuf.h

@@ -9,8 +9,8 @@ struct mg_iobuf {
   size_t align;        // Alignment during allocation
 };
 
-int mg_iobuf_init(struct mg_iobuf *, size_t, size_t);
+bool mg_iobuf_init(struct mg_iobuf *, size_t, size_t);
-int mg_iobuf_resize(struct mg_iobuf *, size_t);
+bool mg_iobuf_resize(struct mg_iobuf *, size_t);
 void mg_iobuf_free(struct mg_iobuf *);
 size_t mg_iobuf_add(struct mg_iobuf *, size_t, const void *, size_t);
 size_t mg_iobuf_del(struct mg_iobuf *, size_t ofs, size_t len);

src/json.c

@@ -60,15 +60,28 @@ static double mg_atod(const char *p, int len, int *numlen) {
 
   // Exponential
   if (i < len && (p[i] == 'e' || p[i] == 'E')) {
-    int j, exp = 0, minus = 0;
+    int exp = 0, minus = 0;
     i++;
     if (i < len && p[i] == '-') minus = 1, i++;
     if (i < len && p[i] == '+') i++;
     while (i < len && p[i] >= '0' && p[i] <= '9' && exp < 308)
       exp = exp * 10 + (p[i++] - '0');
-    if (minus) exp = -exp;
+    // use fast exponentiation
-    for (j = 0; j < exp; j++) d *= 10.0;
+    // https://en.wikipedia.org/wiki/Exponentiation_by_squaring
-    for (j = 0; j < -exp; j++) d /= 10.0;
+    if (exp != 0) {
+      double x = 10, y = 1;
+      if (exp > 308) exp = 308;
+      if (minus) x = 0.1;
+      while (exp > 1) {
+        if (exp & 1) {
+          y *= x;
+          --exp;
+        }
+        x *= x;
+        exp >>= 1;
+      }
+      d *= x * y;
+    }
   }
 
   if (numlen != NULL) *numlen = i;

src/l2.c

@@ -0,0 +1,121 @@
+#include "l2.h"
+#include "net.h"
+#include "net_builtin.h"
+
+#if MG_ENABLE_TCPIP
+
+// L2 API
+void mg_l2_init(enum mg_l2type type, uint8_t *addr, uint16_t *mtu,
+                uint16_t *framesize);
+uint8_t *mg_l2_header(enum mg_l2type type, enum mg_l2proto proto, uint8_t *src,
+                      uint8_t *dst, uint8_t *frame);
+size_t mg_l2_footer(enum mg_l2type type, size_t len, uint8_t *frame);
+bool mg_l2_rx(struct mg_tcpip_if *ifp, enum mg_l2proto *proto,
+              struct mg_str *pay, struct mg_str *raw);
+// TODO(): ? bool mg_l2_rx(enum mg_l2type type, struct mg_l2opts *opts, uint8_t
+// *addr, enum mg_l2proto *proto, struct mg_str *pay, struct mg_str *raw);
+uint8_t *mg_l2_getaddr(enum mg_l2type type, uint8_t *frame);
+uint8_t *mg_l2_mapip(enum mg_l2type type, enum mg_l2addrtype addrtype,
+                     struct mg_addr *ip);
+bool mg_l2_genip6(enum mg_l2type type, uint64_t *ip6, uint8_t prefix_len,
+                  uint8_t *addr);
+bool mg_l2_ip6get(enum mg_l2type type, uint8_t *addr, uint8_t *opts,
+                  uint8_t len);
+uint8_t mg_l2_ip6put(enum mg_l2type type, uint8_t *addr, uint8_t *opts);
+
+// clang-format off
+extern void mg_l2_eth_init(struct mg_l2addr *, uint16_t *, uint16_t *);
+extern uint8_t *mg_l2_eth_header(enum mg_l2proto, struct mg_l2addr *, struct mg_l2addr *, uint8_t *);
+extern size_t mg_l2_eth_footer(size_t, uint8_t *);
+extern bool mg_l2_eth_rx(struct mg_tcpip_if *, enum mg_l2proto *, struct mg_str *, struct mg_str *);
+extern struct mg_l2addr *mg_l2_eth_getaddr(uint8_t *);
+extern struct mg_l2addr *mg_l2_eth_mapip(enum mg_l2addrtype, struct mg_addr *);
+extern bool mg_l2_eth_genip6(uint64_t *, uint8_t, struct mg_l2addr *);
+extern bool mg_l2_eth_ip6get(struct mg_l2addr *, uint8_t *, uint8_t);
+extern uint8_t mg_l2_eth_ip6put(struct mg_l2addr *, uint8_t *);
+
+extern void mg_l2_ppp_init(struct mg_l2addr *, uint16_t *, uint16_t *);
+extern uint8_t *mg_l2_ppp_header(enum mg_l2proto, struct mg_l2addr *, struct mg_l2addr *, uint8_t *);
+extern size_t mg_l2_ppp_footer(size_t, uint8_t *);
+extern bool mg_l2_ppp_rx(struct mg_tcpip_if *, enum mg_l2proto *, struct mg_str *, struct mg_str *);
+extern struct mg_l2addr *mg_l2_ppp_getaddr(uint8_t *);
+extern struct mg_l2addr *mg_l2_ppp_mapip(enum mg_l2addrtype, struct mg_addr *);
+#if MG_ENABLE_IPV6
+extern bool mg_l2_ppp_genip6(uint64_t *, uint8_t, struct mg_l2addr *);
+extern bool mg_l2_ppp_ip6get(struct mg_l2addr *, uint8_t *, uint8_t);
+extern uint8_t mg_l2_ppp_ip6put(struct mg_l2addr *, uint8_t *);
+#endif
+
+typedef void (*l2_init_fn)(struct mg_l2addr *, uint16_t *, uint16_t *);
+typedef uint8_t *((*l2_header_fn)(enum mg_l2proto, struct mg_l2addr *, struct mg_l2addr *, uint8_t *));
+typedef size_t (*l2_footer_fn)(size_t, uint8_t *);
+typedef bool (*l2_rx_fn)(struct mg_tcpip_if *, enum mg_l2proto *, struct mg_str *, struct mg_str *);
+typedef struct mg_l2addr (*(*l2_getaddr_fn)(uint8_t *));
+typedef struct mg_l2addr (*(*l2_mapip_fn)(enum mg_l2addrtype, struct mg_addr *));
+#if MG_ENABLE_IPV6
+typedef bool (*l2_genip6_fn)(uint64_t *, uint8_t, struct mg_l2addr *);
+typedef bool (*l2_ip6get_fn)(struct mg_l2addr *, uint8_t *, uint8_t);
+typedef uint8_t (*l2_ip6put_fn)(struct mg_l2addr *, uint8_t *);
+#endif
+// clang-format on
+
+static const l2_init_fn l2_init[] = {mg_l2_eth_init, mg_l2_ppp_init};
+static const l2_header_fn l2_header[] = {mg_l2_eth_header, mg_l2_ppp_header};
+static const l2_footer_fn l2_footer[] = {mg_l2_eth_footer, mg_l2_ppp_footer};
+static const l2_rx_fn l2_rx[] = {mg_l2_eth_rx, mg_l2_ppp_rx};
+static const l2_getaddr_fn l2_getaddr[] = {mg_l2_eth_getaddr,
+                                           mg_l2_ppp_getaddr};
+static const l2_mapip_fn l2_mapip[] = {mg_l2_eth_mapip, mg_l2_ppp_mapip};
+#if MG_ENABLE_IPV6
+static const l2_genip6_fn l2_genip6[] = {mg_l2_eth_genip6, mg_l2_ppp_genip6};
+static const l2_ip6get_fn l2_ip6get[] = {mg_l2_eth_ip6get, mg_l2_ppp_ip6get};
+static const l2_ip6put_fn l2_ip6put[] = {mg_l2_eth_ip6put, mg_l2_ppp_ip6put};
+#endif
+
+void mg_l2_init(enum mg_l2type type, uint8_t *addr, uint16_t *mtu,
+                uint16_t *framesize) {
+  l2_init[type]((struct mg_l2addr *) addr, mtu, framesize);
+}
+
+uint8_t *mg_l2_header(enum mg_l2type type, enum mg_l2proto proto, uint8_t *src,
+                      uint8_t *dst, uint8_t *frame) {
+  return l2_header[type](proto, (struct mg_l2addr *) src,
+                         (struct mg_l2addr *) dst, frame);
+}
+
+size_t mg_l2_footer(enum mg_l2type type, size_t len, uint8_t *frame) {
+  return l2_footer[type](len, frame);
+}
+
+bool mg_l2_rx(struct mg_tcpip_if *ifp, enum mg_l2proto *proto,
+              struct mg_str *pay, struct mg_str *raw) {
+  return l2_rx[ifp->l2type](ifp, proto, pay, raw);
+}
+
+uint8_t *mg_l2_getaddr(enum mg_l2type type, uint8_t *frame) {
+  return (uint8_t *) l2_getaddr[type](frame);
+}
+
+struct mg_l2addr s_mapip;
+
+uint8_t *mg_l2_mapip(enum mg_l2type type, enum mg_l2addrtype addrtype,
+                     struct mg_addr *ip) {
+  return (uint8_t *) l2_mapip[type](addrtype, ip);
+}
+
+#if MG_ENABLE_IPV6
+bool mg_l2_genip6(enum mg_l2type type, uint64_t *ip6, uint8_t prefix_len,
+                  uint8_t *addr) {
+  return l2_genip6[type](ip6, prefix_len, (struct mg_l2addr *) addr);
+}
+
+bool mg_l2_ip6get(enum mg_l2type type, uint8_t *addr, uint8_t *opts,
+                  uint8_t len) {
+  return l2_ip6get[type]((struct mg_l2addr *) addr, opts, len);
+}
+uint8_t mg_l2_ip6put(enum mg_l2type type, uint8_t *addr, uint8_t *opts) {
+  return l2_ip6put[type]((struct mg_l2addr *) addr, opts);
+}
+#endif
+
+#endif

src/l2.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include "arch.h"
+#include "config.h"
+
+#if MG_ENABLE_TCPIP
+
+// no config defaults to 0 => Ethernet
+enum mg_l2type { MG_TCPIP_L2_ETH = 0, MG_TCPIP_L2_PPP };  // MG_TCPIP_L2_PPPoE
+
+#if defined(__DCC__)
+#pragma pack(1)
+#else
+#pragma pack(push, 1)
+#endif
+
+struct mg_l2addr {
+  union {
+    uint8_t mac[6];
+  } addr;
+};
+
+#if defined(__DCC__)
+#pragma pack(0)
+#else
+#pragma pack(pop)
+#endif
+
+#if 0
+TODO(): ?
+struct eth_opts {
+  bool enable_crc32_check;         // Do a CRC check on RX frames and strip it
+  bool enable_mac_check;           // Do a MAC check on RX frames
+};
+struct mg_l2opts {
+  union {
+    struct eth_opts eth;
+  };
+};
+#endif
+
+enum mg_l2proto {
+  MG_TCPIP_L2PROTO_IPV4 = 0,
+  MG_TCPIP_L2PROTO_IPV6,
+  MG_TCPIP_L2PROTO_ARP,
+  MG_TCPIP_L2PROTO_PPPoE_DISC,
+  MG_TCPIP_L2PROTO_PPPoE_SESS
+};
+enum mg_l2addrtype {
+  MG_TCPIP_L2ADDR_BCAST,
+  MG_TCPIP_L2ADDR_MCAST,
+  MG_TCPIP_L2ADDR_MCAST6
+};
+
+#endif

src/l2_eth.c

@@ -0,0 +1,171 @@
+#include "l2.h"
+#include "log.h"
+#include "net.h"
+#include "net_builtin.h"
+#include "printf.h"
+#include "util.h"
+
+#if MG_ENABLE_TCPIP
+
+#if defined(__DCC__)
+#pragma pack(1)
+#else
+#pragma pack(push, 1)
+#endif
+
+struct eth {
+  uint8_t dst[6];  // Destination MAC address
+  uint8_t src[6];  // Source MAC address
+  uint16_t type;   // Ethernet type
+};
+
+#if defined(__DCC__)
+#pragma pack(0)
+#else
+#pragma pack(pop)
+#endif
+
+static const uint16_t eth_types[] = {
+    // order is vital, see l2.h
+    0x800,   // IPv4
+    0x86dd,  // IPv6
+    0x806,   // ARP
+    0x8863,  // PPPoE Discovery Stage
+    0x8864   // PPPoE Session Stage
+};
+
+void mg_l2_eth_init(struct mg_l2addr *l2addr, uint16_t *mtu,
+                    uint16_t *framesize) {
+  // If MAC is not set, make a random one
+  if (l2addr->addr.mac[0] == 0 && l2addr->addr.mac[1] == 0 &&
+      l2addr->addr.mac[2] == 0 && l2addr->addr.mac[3] == 0 &&
+      l2addr->addr.mac[4] == 0 && l2addr->addr.mac[5] == 0) {
+    l2addr->addr.mac[0] = 0x02;  // Locally administered, unicast
+    mg_random(&l2addr->addr.mac[1], sizeof(l2addr->addr.mac) - 1);
+    MG_INFO(
+        ("MAC not set. Generated random: %M", mg_print_mac, l2addr->addr.mac));
+  }
+  *mtu = 1500;
+  *framesize = 1540;
+}
+
+uint8_t *mg_l2_eth_header(enum mg_l2proto proto, struct mg_l2addr *src,
+                          struct mg_l2addr *dst, uint8_t *frame) {
+  struct eth *eth = (struct eth *) frame;
+  eth->type = mg_htons(eth_types[(unsigned int) proto]);
+  memcpy(eth->src, src->addr.mac, sizeof(eth->dst));
+  memcpy(eth->dst, dst->addr.mac, sizeof(eth->dst));
+  return (uint8_t *) (eth + 1);
+}
+
+size_t mg_l2_eth_footer(size_t len, uint8_t *frame) {
+  struct eth *eth = (struct eth *) frame;
+  // nothing to do; there is no len field in Ethernet, CRC is hw-calculated
+  return len + sizeof(*eth);
+}
+
+struct mg_l2addr *mg_l2_eth_mapip(enum mg_l2addrtype addrtype,
+                                  struct mg_addr *addr);
+
+bool mg_l2_eth_rx(struct mg_tcpip_if *ifp, enum mg_l2proto *proto,
+                  struct mg_str *pay, struct mg_str *raw) {
+  struct eth *eth = (struct eth *) raw->buf;
+  uint16_t type, len;
+  unsigned int i;
+  if (raw->len < sizeof(*eth)) return false;  // Truncated - runt?
+  len = (uint16_t) raw->len;
+  if (ifp->enable_mac_check &&
+      memcmp(eth->dst, ifp->mac, sizeof(eth->dst)) != 0 &&
+      memcmp(eth->dst, mg_l2_eth_mapip(MG_TCPIP_L2ADDR_BCAST, NULL),
+             sizeof(eth->dst)) != 0)
+    return false;  // TODO(): add multicast addresses
+  if (ifp->enable_crc32_check && len > sizeof(*eth) + 4) {
+    uint32_t crc;
+    len -= 4;  // TODO(scaprile): check on bigendian
+    crc = mg_crc32(0, (const char *) raw->buf, len);
+    if (memcmp((void *) ((size_t) raw->buf + len), &crc, sizeof(crc)))
+      return false;
+  }
+  pay->buf = (char *) (eth + 1);
+  pay->len = len - sizeof(*eth);
+
+  type = mg_htons(eth->type);
+  for (i = 0; i < sizeof(eth_types) / sizeof(uint16_t); i++) {
+    if (type == eth_types[i]) break;
+  }
+  if (i == sizeof(eth_types)) {
+    MG_DEBUG(("Unknown eth type %x", type));
+    if (mg_log_level >= MG_LL_VERBOSE)
+      mg_hexdump(raw->buf, raw->len >= 32 ? 32 : raw->len);
+    return false;
+  }
+  *proto = (enum mg_l2proto) i;
+  return true;
+}
+
+struct mg_l2addr *mg_l2_eth_getaddr(uint8_t *frame) {
+  struct eth *eth = (struct eth *) frame;
+  return (struct mg_l2addr *) &eth->src;
+}
+
+extern struct mg_l2addr s_mapip;
+
+struct mg_l2addr *mg_l2_eth_mapip(enum mg_l2addrtype addrtype,
+                                  struct mg_addr *addr) {
+  switch (addrtype) {
+    case MG_TCPIP_L2ADDR_BCAST:
+      memset(s_mapip.addr.mac, 0xff, sizeof(s_mapip.addr.mac));
+      break;
+    case MG_TCPIP_L2ADDR_MCAST: {
+      uint8_t *ip = (uint8_t *) &addr->addr.ip4;
+      // IP multicast group MAC, RFC-1112 6.4
+      s_mapip.addr.mac[0] = 0x01, s_mapip.addr.mac[1] = 0x00,
+      s_mapip.addr.mac[2] = 0x5E;
+      s_mapip.addr.mac[3] = ip[1] & 0x7F;  // 23 LSb
+      s_mapip.addr.mac[4] = ip[2];
+      s_mapip.addr.mac[5] = ip[3];
+      break;
+    }
+    case MG_TCPIP_L2ADDR_MCAST6: {
+      // IPv6 multicast address mapping, RFC-2464 7
+      uint8_t *ip = (uint8_t *) &addr->addr.ip6;
+      s_mapip.addr.mac[0] = 0x33, s_mapip.addr.mac[1] = 0x33;
+      s_mapip.addr.mac[2] = ip[12], s_mapip.addr.mac[3] = ip[13],
+      s_mapip.addr.mac[4] = ip[14], s_mapip.addr.mac[5] = ip[15];
+      break;
+    }
+  }
+  return &s_mapip;
+}
+
+#if MG_ENABLE_IPV6
+static void meui64(uint8_t *addr, uint8_t *mac) {
+  *addr++ = *mac++ ^ (uint8_t) 0x02, *addr++ = *mac++, *addr++ = *mac++;
+  *addr++ = 0xff, *addr++ = 0xfe;
+  *addr++ = *mac++, *addr++ = *mac++, *addr = *mac;
+}
+
+bool mg_l2_eth_genip6(uint64_t *ip6, uint8_t prefix_len,
+                      struct mg_l2addr *l2addr) {
+  if (prefix_len > 64) {
+    MG_ERROR(("Prefix length > 64, UNSUPPORTED"));
+    return false;
+  }
+  ip6[0] = 0;
+  meui64(((uint8_t *) &ip6[1]), l2addr->addr.mac);  // RFC-4291 2.5.4, 2.5.1
+  return true;
+}
+
+bool mg_l2_eth_ip6get(struct mg_l2addr *l2addr, uint8_t *opts, uint8_t len) {
+  if (len != 1) return false;
+  memcpy(l2addr->addr.mac, opts, 6);
+  return true;
+}
+
+uint8_t mg_l2_eth_ip6put(struct mg_l2addr *l2addr, uint8_t *opts) {
+  memcpy(opts, l2addr->addr.mac, 6);
+  return 1;
+}
+#endif
+
+#endif

src/l2_ppp.c

@@ -0,0 +1,115 @@
+#include "l2.h"
+#include "log.h"
+#include "net.h"
+#include "net_builtin.h"
+#include "printf.h"
+#include "util.h"
+
+#if MG_ENABLE_TCPIP
+
+#if defined(__DCC__)
+#pragma pack(1)
+#else
+#pragma pack(push, 1)
+#endif
+
+struct ppp {  // RFC-1662
+  uint8_t addr, ctrl;
+  uint16_t proto;
+};
+
+struct lcp {  // RFC-1661
+  uint8_t code, id, len[2];
+};
+
+struct ipcp { // RFC-1332
+  uint8_t code;
+};
+
+struct ipv6cp { // RFC-5072
+  uint8_t code;
+};
+
+#if defined(__DCC__)
+#pragma pack(0)
+#else
+#pragma pack(pop)
+#endif
+
+
+void mg_l2_ppp_init(struct mg_l2addr *addr, uint16_t *mtu,
+                    uint16_t *framesize) {
+  (void) addr;
+  *mtu = 1500;        // 1492 for PPPoE
+  *framesize = 1540;  // *** TODO(scaprile): actual value, check for PPPoE too
+}
+
+uint8_t *mg_l2_ppp_header(enum mg_l2proto proto, struct mg_l2addr *src,
+                          struct mg_l2addr *dst, uint8_t *frame) {
+  (void) src;
+  (void) dst;
+  (void) proto;
+  return frame;
+}
+
+size_t mg_l2_ppp_footer(size_t len, uint8_t *frame) {
+  (void) frame;
+  return len;
+}
+
+bool mg_l2_ppp_rx(struct mg_tcpip_if *ifp, enum mg_l2proto *proto,
+                  struct mg_str *pay, struct mg_str *raw) {
+#if 0
+if (ppp->addr == MG_PPP_ADDR && ppp->ctrl == MG_PPP_CTRL) {
+  code = ntohs(ppp->proto);
+  payload = (uint8_t *) (ppp + 1);
+} else { // Address-and-Control-Field-Compressed PPP header
+  uint16_t *cppp = (uint16_t *) ppp;
+  code = ntohs(*cppp);
+  payload = (uint8_t *) (cppp + 1);
+}
+#endif
+  *pay = *raw;
+  *proto = MG_TCPIP_L2PROTO_IPV4;
+  (void) ifp;
+  return true;
+}
+
+struct mg_l2addr *mg_l2_ppp_getaddr(uint8_t *frame) {
+  (void) frame;
+  return &s_mapip;  // bogus
+}
+
+extern struct mg_l2addr s_mapip;
+
+struct mg_l2addr *mg_l2_ppp_mapip(enum mg_l2addrtype addrtype,
+                                  struct mg_addr *addr) {
+  (void) addrtype;
+  (void) addr;
+  return &s_mapip;  // bogus
+}
+
+#if MG_ENABLE_IPV6
+bool mg_l2_ppp_genip6(uint64_t *ip6, uint8_t prefix_len,
+                      struct mg_l2addr *addr) {
+  (void) ip6;
+  (void) prefix_len;
+  (void) addr;
+  return false;
+}
+
+bool mg_l2_ppp_ip6get(struct mg_l2addr *addr, uint8_t *opts, uint8_t len) {
+  (void) addr;
+  (void) opts;
+  (void) len;
+  return false;
+}
+
+uint8_t mg_l2_ppp_ip6put(struct mg_l2addr *addr, uint8_t *opts) {
+  (void) addr;
+  (void) opts;
+  return 0;
+}
+#endif
+
+#endif

src/log.h

@@ -16,12 +16,18 @@ void mg_log_set_fn(mg_pfn_t fn, void *param);
 #define mg_log_set(level_) mg_log_level = (level_)
 
 #if MG_ENABLE_LOG
-#define MG_LOG(level, args)                                 \
+#if !defined(_MSC_VER) && \
-  do {                                                      \
+    (!defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L)
-    if ((level) <= mg_log_level) {                          \
+#define MG___FUNC__ ""
-      mg_log_prefix((level), __FILE__, __LINE__, __func__); \
+#else
-      mg_log args;                                          \
+#define MG___FUNC__ __func__  // introduced in C99
-    }                                                       \
+#endif
+#define MG_LOG(level, args)                                    \
+  do {                                                         \
+    if ((level) <= mg_log_level) {                             \
+      mg_log_prefix((level), __FILE__, __LINE__, MG___FUNC__); \
+      mg_log args;                                             \
+    }                                                          \
   } while (0)
 #else
 #define MG_LOG(level, args) \

src/mqtt.c

@@ -1,8 +1,8 @@
-#include "mqtt.h"
 #include "arch.h"
 #include "base64.h"
 #include "event.h"
 #include "log.h"
+#include "mqtt.h"
 #include "url.h"
 #include "util.h"
 
@@ -46,8 +46,8 @@ static const struct mg_mqtt_pmap s_prop_map[] = {
     {MQTT_PROP_SUBSCRIPTION_IDENTIFIER_AVAILABLE, MQTT_PROP_TYPE_BYTE},
     {MQTT_PROP_SHARED_SUBSCRIPTION_AVAILABLE, MQTT_PROP_TYPE_BYTE}};
 
-void mg_mqtt_send_header(struct mg_connection *c, uint8_t cmd, uint8_t flags,
+static bool mqtt_send_header(struct mg_connection *c, uint8_t cmd,
-                         uint32_t len) {
+                             uint8_t flags, uint32_t len) {
   uint8_t buf[1 + sizeof(len)], *vlen = &buf[1];
   buf[0] = (uint8_t) ((cmd << 4) | flags);
   do {
@@ -56,15 +56,20 @@ void mg_mqtt_send_header(struct mg_connection *c, uint8_t cmd, uint8_t flags,
     if (len > 0) *vlen |= 0x80;
     vlen++;
   } while (len > 0 && vlen < &buf[sizeof(buf)]);
-  mg_send(c, buf, (size_t) (vlen - buf));
+  return mg_send(c, buf, (size_t) (vlen - buf));
 }
 
-static void mg_send_u16(struct mg_connection *c, uint16_t value) {
+void mg_mqtt_send_header(struct mg_connection *c, uint8_t cmd, uint8_t flags,
-  mg_send(c, &value, sizeof(value));
+                         uint32_t len) {
+  if (!mqtt_send_header(c, cmd, flags, len)) mg_error(c, "OOM");
 }
 
-static void mg_send_u32(struct mg_connection *c, uint32_t value) {
+static bool mg_send_u16(struct mg_connection *c, uint16_t value) {
-  mg_send(c, &value, sizeof(value));
+  return mg_send(c, &value, sizeof(value));
+}
+
+static bool mg_send_u32(struct mg_connection *c, uint32_t value) {
+  return mg_send(c, &value, sizeof(value));
 }
 
 static uint8_t varint_size(size_t length) {
@@ -132,17 +137,10 @@ static size_t get_properties_length(struct mg_mqtt_prop *props, size_t count) {
       case MQTT_PROP_TYPE_VARIABLE_INT:
         size += varint_size((uint32_t) props[i].iv);
         break;
-      case MQTT_PROP_TYPE_INT:
+      case MQTT_PROP_TYPE_INT: size += (uint32_t) sizeof(uint32_t); break;
-        size += (uint32_t) sizeof(uint32_t);
+      case MQTT_PROP_TYPE_SHORT: size += (uint32_t) sizeof(uint16_t); break;
-        break;
+      case MQTT_PROP_TYPE_BYTE: size += (uint32_t) sizeof(uint8_t); break;
-      case MQTT_PROP_TYPE_SHORT:
+      default: return size;  // cannot parse further down
-        size += (uint32_t) sizeof(uint16_t);
-        break;
-      case MQTT_PROP_TYPE_BYTE:
-        size += (uint32_t) sizeof(uint8_t);
-        break;
-      default:
-        return size;  // cannot parse further down
     }
   }
 
@@ -157,46 +155,50 @@ static size_t get_props_size(struct mg_mqtt_prop *props, size_t count) {
   return size;
 }
 
-static void mg_send_mqtt_properties(struct mg_connection *c,
+static bool mg_send_mqtt_properties(struct mg_connection *c,
                                     struct mg_mqtt_prop *props, size_t nprops) {
   size_t total_size = get_properties_length(props, nprops);
   uint8_t buf_v[4] = {0, 0, 0, 0};
   uint8_t buf[4] = {0, 0, 0, 0};
   size_t i, len = encode_varint(buf, total_size);
 
-  mg_send(c, buf, (size_t) len);
+  if (!mg_send(c, buf, (size_t) len)) return false;
   for (i = 0; i < nprops; i++) {
-    mg_send(c, &props[i].id, sizeof(props[i].id));
+    if (!mg_send(c, &props[i].id, sizeof(props[i].id))) return false;
     switch (mqtt_prop_type_by_id(props[i].id)) {
       case MQTT_PROP_TYPE_STRING_PAIR:
-        mg_send_u16(c, mg_htons((uint16_t) props[i].key.len));
+        if (!mg_send_u16(c, mg_htons((uint16_t) props[i].key.len)) ||
-        mg_send(c, props[i].key.buf, props[i].key.len);
+            !mg_send(c, props[i].key.buf, props[i].key.len) ||
-        mg_send_u16(c, mg_htons((uint16_t) props[i].val.len));
+            !mg_send_u16(c, mg_htons((uint16_t) props[i].val.len)) ||
-        mg_send(c, props[i].val.buf, props[i].val.len);
+            !mg_send(c, props[i].val.buf, props[i].val.len))
+          return false;
         break;
       case MQTT_PROP_TYPE_BYTE:
-        mg_send(c, &props[i].iv, sizeof(uint8_t));
+        if (!mg_send(c, &props[i].iv, sizeof(uint8_t))) return false;
         break;
       case MQTT_PROP_TYPE_SHORT:
-        mg_send_u16(c, mg_htons((uint16_t) props[i].iv));
+        if (!mg_send_u16(c, mg_htons((uint16_t) props[i].iv))) return false;
         break;
       case MQTT_PROP_TYPE_INT:
-        mg_send_u32(c, mg_htonl((uint32_t) props[i].iv));
+        if (!mg_send_u32(c, mg_htonl((uint32_t) props[i].iv))) return false;
         break;
       case MQTT_PROP_TYPE_STRING:
-        mg_send_u16(c, mg_htons((uint16_t) props[i].val.len));
+        if (!mg_send_u16(c, mg_htons((uint16_t) props[i].val.len)) ||
-        mg_send(c, props[i].val.buf, props[i].val.len);
+            !mg_send(c, props[i].val.buf, props[i].val.len))
+          return false;
         break;
       case MQTT_PROP_TYPE_BINARY_DATA:
-        mg_send_u16(c, mg_htons((uint16_t) props[i].val.len));
+        if (!mg_send_u16(c, mg_htons((uint16_t) props[i].val.len)) ||
-        mg_send(c, props[i].val.buf, props[i].val.len);
+            !mg_send(c, props[i].val.buf, props[i].val.len))
+          return false;
         break;
       case MQTT_PROP_TYPE_VARIABLE_INT:
         len = encode_varint(buf_v, props[i].iv);
-        mg_send(c, buf_v, (size_t) len);
+        if (!mg_send(c, buf_v, (size_t) len)) return false;
         break;
     }
   }
+  return true;
 }
 
 size_t mg_mqtt_next_prop(struct mg_mqtt_message *msg, struct mg_mqtt_prop *prop,
@@ -204,50 +206,64 @@ size_t mg_mqtt_next_prop(struct mg_mqtt_message *msg, struct mg_mqtt_prop *prop,
   uint8_t *i = (uint8_t *) msg->dgram.buf + msg->props_start + ofs;
   uint8_t *end = (uint8_t *) msg->dgram.buf + msg->dgram.len;
   size_t new_pos = ofs, len;
-  prop->id = i[0];
 
-  if (ofs >= msg->dgram.len || ofs >= msg->props_start + msg->props_size)
+  if (ofs >= msg->dgram.len || ofs >= msg->props_start + msg->props_size || (i + 1) >= end)
     return 0;
+
+  memset(prop, 0, sizeof(struct mg_mqtt_prop));
+  prop->id = i[0];
   i++, new_pos++;
 
   switch (mqtt_prop_type_by_id(prop->id)) {
     case MQTT_PROP_TYPE_STRING_PAIR:
+      if (i + 2 >= end) return 0;
       prop->key.len = (uint16_t) ((((uint16_t) i[0]) << 8) | i[1]);
       prop->key.buf = (char *) i + 2;
       i += 2 + prop->key.len;
+      if (i + 2 >= end) return 0;
       prop->val.len = (uint16_t) ((((uint16_t) i[0]) << 8) | i[1]);
       prop->val.buf = (char *) i + 2;
+      if (i + 2 + prop->val.len >= end) return 0;
       new_pos += 2 * sizeof(uint16_t) + prop->val.len + prop->key.len;
       break;
     case MQTT_PROP_TYPE_BYTE:
+      if (i + 1 >= end) return 0;
       prop->iv = (uint8_t) i[0];
       new_pos++;
       break;
     case MQTT_PROP_TYPE_SHORT:
+      if (i + 2 >= end) return 0;
       prop->iv = (uint16_t) ((((uint16_t) i[0]) << 8) | i[1]);
       new_pos += sizeof(uint16_t);
       break;
     case MQTT_PROP_TYPE_INT:
+      if (i + 4 >= end) return 0;
       prop->iv = ((uint32_t) i[0] << 24) | ((uint32_t) i[1] << 16) |
                  ((uint32_t) i[2] << 8) | i[3];
       new_pos += sizeof(uint32_t);
       break;
     case MQTT_PROP_TYPE_STRING:
+      if (i + 2 >= end) return 0;
       prop->val.len = (uint16_t) ((((uint16_t) i[0]) << 8) | i[1]);
       prop->val.buf = (char *) i + 2;
+      if (i + 2 + prop->val.len >= end) return 0;
       new_pos += 2 + prop->val.len;
       break;
     case MQTT_PROP_TYPE_BINARY_DATA:
+      if (i + 2 >= end) return 0;
       prop->val.len = (uint16_t) ((((uint16_t) i[0]) << 8) | i[1]);
       prop->val.buf = (char *) i + 2;
+      if (i + 2 + prop->val.len >= end) return 0;
       new_pos += 2 + prop->val.len;
       break;
     case MQTT_PROP_TYPE_VARIABLE_INT:
       len = decode_varint(i, (size_t) (end - i), (size_t *) &prop->iv);
-      new_pos = (!len) ? 0 : new_pos + len;
+      if (i + len >= end) return 0;
+      new_pos = (len == 0) ? 0 : new_pos + len;
       break;
     default:
       new_pos = 0;
+      break;
   }
 
   return new_pos;
@@ -257,7 +273,8 @@ void mg_mqtt_login(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
   char client_id[21];
   struct mg_str cid = opts->client_id;
   size_t total_len = 7 + 1 + 2 + 2;
-  uint8_t hdr[8] = {0, 4, 'M', 'Q', 'T', 'T', opts->version, 0};
+  uint8_t hdr[8] = {0, 4, 'M', 'Q', 'T', 'T', 0, 0};
+  hdr[6] = opts->version;
 
   if (cid.len == 0) {
     mg_random_str(client_id, sizeof(client_id) - 1);
@@ -289,33 +306,41 @@ void mg_mqtt_login(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
       total_len += get_props_size(opts->will_props, opts->num_will_props);
   }
 
-  mg_mqtt_send_header(c, MQTT_CMD_CONNECT, 0, (uint32_t) total_len);
-  mg_send(c, hdr, sizeof(hdr));
   // keepalive == 0 means "do not disconnect us!"
-  mg_send_u16(c, mg_htons((uint16_t) opts->keepalive));
+  if (!mqtt_send_header(c, MQTT_CMD_CONNECT, 0, (uint32_t) total_len) ||
+      !mg_send(c, hdr, sizeof(hdr)) ||
+      !mg_send_u16(c, mg_htons((uint16_t) opts->keepalive)))
+    goto fail;
 
-  if (c->is_mqtt5) mg_send_mqtt_properties(c, opts->props, opts->num_props);
+  if (c->is_mqtt5 && !mg_send_mqtt_properties(c, opts->props, opts->num_props))
+    goto fail;
 
-  mg_send_u16(c, mg_htons((uint16_t) cid.len));
+  if (!mg_send_u16(c, mg_htons((uint16_t) cid.len)) ||
-  mg_send(c, cid.buf, cid.len);
+      !mg_send(c, cid.buf, cid.len))
+    goto fail;
 
   if (hdr[7] & MQTT_HAS_WILL) {
-    if (c->is_mqtt5)
+    if (c->is_mqtt5 &&
-      mg_send_mqtt_properties(c, opts->will_props, opts->num_will_props);
+        !mg_send_mqtt_properties(c, opts->will_props, opts->num_will_props))
+      goto fail;
 
-    mg_send_u16(c, mg_htons((uint16_t) opts->topic.len));
+    if (!mg_send_u16(c, mg_htons((uint16_t) opts->topic.len)) ||
-    mg_send(c, opts->topic.buf, opts->topic.len);
+        !mg_send(c, opts->topic.buf, opts->topic.len) ||
-    mg_send_u16(c, mg_htons((uint16_t) opts->message.len));
+        !mg_send_u16(c, mg_htons((uint16_t) opts->message.len)) ||
-    mg_send(c, opts->message.buf, opts->message.len);
+        !mg_send(c, opts->message.buf, opts->message.len))
-  }
+      goto fail;
-  if (opts->user.len > 0) {
-    mg_send_u16(c, mg_htons((uint16_t) opts->user.len));
-    mg_send(c, opts->user.buf, opts->user.len);
-  }
-  if (opts->pass.len > 0) {
-    mg_send_u16(c, mg_htons((uint16_t) opts->pass.len));
-    mg_send(c, opts->pass.buf, opts->pass.len);
   }
+  if (opts->user.len > 0 &&
+      (!mg_send_u16(c, mg_htons((uint16_t) opts->user.len)) ||
+       !mg_send(c, opts->user.buf, opts->user.len)))
+    goto fail;
+  if (opts->pass.len > 0 &&
+      (!mg_send_u16(c, mg_htons((uint16_t) opts->pass.len)) ||
+       !mg_send(c, opts->pass.buf, opts->pass.len)))
+    goto fail;
+  return;
+fail:
+  mg_error(c, "OOM");
 }
 
 uint16_t mg_mqtt_pub(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
@@ -330,36 +355,60 @@ uint16_t mg_mqtt_pub(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
   if (c->is_mqtt5) len += get_props_size(opts->props, opts->num_props);
 
   if (opts->qos > 0 && id != 0) flags |= 1 << 3;
-  mg_mqtt_send_header(c, MQTT_CMD_PUBLISH, flags, (uint32_t) len);
+  if (!mqtt_send_header(c, MQTT_CMD_PUBLISH, flags, (uint32_t) len) ||
-  mg_send_u16(c, mg_htons((uint16_t) opts->topic.len));
+      !mg_send_u16(c, mg_htons((uint16_t) opts->topic.len)) ||
-  mg_send(c, opts->topic.buf, opts->topic.len);
+      !mg_send(c, opts->topic.buf, opts->topic.len))
+    goto fail;
   if (opts->qos > 0) {  // need to send 'id' field
     if (id == 0) {      // generate new one if not resending
       if (++c->mgr->mqtt_id == 0) ++c->mgr->mqtt_id;
       id = c->mgr->mqtt_id;
     }
-    mg_send_u16(c, mg_htons(id));
+    if (!mg_send_u16(c, mg_htons(id))) goto fail;
   }
 
-  if (c->is_mqtt5) mg_send_mqtt_properties(c, opts->props, opts->num_props);
+  if (c->is_mqtt5 && !mg_send_mqtt_properties(c, opts->props, opts->num_props))
+    goto fail;
 
-  if (opts->message.len > 0) mg_send(c, opts->message.buf, opts->message.len);
+  if (opts->message.len > 0 &&
+      !mg_send(c, opts->message.buf, opts->message.len))
+    goto fail;
+  return id;
+
+fail:
+  mg_error(c, "OOM");
   return id;
 }
 
-void mg_mqtt_sub(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
+static void mg_mqtt_sub_unsub(struct mg_connection *c,
+                              const struct mg_mqtt_opts *opts, uint8_t cmd) {
   uint8_t qos_ = opts->qos & 3;
+  bool is_sub = cmd == MQTT_CMD_SUBSCRIBE;
   size_t plen = c->is_mqtt5 ? get_props_size(opts->props, opts->num_props) : 0;
-  size_t len = 2 + opts->topic.len + 2 + 1 + plen;
+  size_t len = 2 + opts->topic.len + 2 + (is_sub ? 1 : 0) + plen;
 
-  mg_mqtt_send_header(c, MQTT_CMD_SUBSCRIBE, 2, (uint32_t) len);
+  if (!mqtt_send_header(c, cmd, 2, (uint32_t) len)) goto fail;
   if (++c->mgr->mqtt_id == 0) ++c->mgr->mqtt_id;
-  mg_send_u16(c, mg_htons(c->mgr->mqtt_id));
+  if (!mg_send_u16(c, mg_htons(c->mgr->mqtt_id))) goto fail;
-  if (c->is_mqtt5) mg_send_mqtt_properties(c, opts->props, opts->num_props);
 
-  mg_send_u16(c, mg_htons((uint16_t) opts->topic.len));
+  if (c->is_mqtt5 && !mg_send_mqtt_properties(c, opts->props, opts->num_props))
-  mg_send(c, opts->topic.buf, opts->topic.len);
+    goto fail;
-  mg_send(c, &qos_, sizeof(qos_));
+
+  if (!mg_send_u16(c, mg_htons((uint16_t) opts->topic.len)) ||
+      !mg_send(c, opts->topic.buf, opts->topic.len))
+    goto fail;
+  if (is_sub && !mg_send(c, &qos_, sizeof(qos_))) goto fail;
+  return;
+fail:
+  mg_error(c, "OOM");
+}
+
+void mg_mqtt_sub(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
+  mg_mqtt_sub_unsub(c, opts, MQTT_CMD_SUBSCRIBE);
+}
+
+void mg_mqtt_unsub(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
+  mg_mqtt_sub_unsub(c, opts, MQTT_CMD_UNSUBSCRIBE);
 }
 
 int mg_mqtt_parse(const uint8_t *buf, size_t len, uint8_t version,
@@ -427,8 +476,7 @@ int mg_mqtt_parse(const uint8_t *buf, size_t len, uint8_t version,
       m->data.len = (size_t) (end - p);
       break;
     }
-    default:
+    default: break;
-      break;
   }
   return MQTT_OK;
 }
@@ -466,15 +514,16 @@ static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data) {
               uint32_t remaining_len = sizeof(id);
               if (c->is_mqtt5) remaining_len += 2;  // 3.4.2
 
-              mg_mqtt_send_header(
+              if (!mqtt_send_header(c,
-                  c,
+                                    (uint8_t) (mm.qos == 2 ? MQTT_CMD_PUBREC
-                  (uint8_t) (mm.qos == 2 ? MQTT_CMD_PUBREC : MQTT_CMD_PUBACK),
+                                                           : MQTT_CMD_PUBACK),
-                  0, remaining_len);
+                                    0, remaining_len) ||
-              mg_send(c, &id, sizeof(id));
+                  !mg_send(c, &id, sizeof(id)))
+                goto fail;
 
               if (c->is_mqtt5) {
                 uint16_t zero = 0;
-                mg_send(c, &zero, sizeof(zero));
+                if (!mg_send(c, &zero, sizeof(zero))) goto fail;
               }
             }
             mg_call(c, MG_EV_MQTT_MSG, &mm);  // let the app handle qos stuff
@@ -483,15 +532,18 @@ static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data) {
           case MQTT_CMD_PUBREC: {  // MQTT5: 3.5.2-1 TODO(): variable header rc
             uint16_t id = mg_ntohs(mm.id);
             uint32_t remaining_len = sizeof(id);  // MQTT5 3.6.2-1
-            mg_mqtt_send_header(c, MQTT_CMD_PUBREL, 2, remaining_len);
+            if (!mqtt_send_header(c, MQTT_CMD_PUBREL, 2,
-            mg_send(c, &id, sizeof(id));  // MQTT5 3.6.1-1, flags = 2
+                                  remaining_len)  // MQTT5 3.6.1-1, flags = 2
+                || !mg_send(c, &id, sizeof(id)))
+              goto fail;
             break;
           }
           case MQTT_CMD_PUBREL: {  // MQTT5: 3.6.2-1 TODO(): variable header rc
             uint16_t id = mg_ntohs(mm.id);
             uint32_t remaining_len = sizeof(id);  // MQTT5 3.7.2-1
-            mg_mqtt_send_header(c, MQTT_CMD_PUBCOMP, 0, remaining_len);
+            if (!mqtt_send_header(c, MQTT_CMD_PUBCOMP, 0, remaining_len) ||
-            mg_send(c, &id, sizeof(id));
+                !mg_send(c, &id, sizeof(id)))
+              goto fail;
             break;
           }
         }
@@ -503,6 +555,9 @@ static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data) {
     }
   }
   (void) ev_data;
+  return;
+fail:
+  mg_error(c, "OOM");
 }
 
 void mg_mqtt_ping(struct mg_connection *nc) {
@@ -517,19 +572,24 @@ void mg_mqtt_disconnect(struct mg_connection *c,
                         const struct mg_mqtt_opts *opts) {
   size_t len = 0;
   if (c->is_mqtt5) len = 1 + get_props_size(opts->props, opts->num_props);
-  mg_mqtt_send_header(c, MQTT_CMD_DISCONNECT, 0, (uint32_t) len);
+  if (!mqtt_send_header(c, MQTT_CMD_DISCONNECT, 0, (uint32_t) len)) goto fail;
 
   if (c->is_mqtt5) {
     uint8_t zero = 0;
-    mg_send(c, &zero, sizeof(zero));  // reason code
+    if (!mg_send(c, &zero, sizeof(zero))  // reason code
-    mg_send_mqtt_properties(c, opts->props, opts->num_props);
+        || !mg_send_mqtt_properties(c, opts->props, opts->num_props))
+      goto fail;
   }
+  return;
+fail:
+  mg_error(c, "OOM");
 }
 
 struct mg_connection *mg_mqtt_connect(struct mg_mgr *mgr, const char *url,
                                       const struct mg_mqtt_opts *opts,
                                       mg_event_handler_t fn, void *fn_data) {
-  struct mg_connection *c = mg_connect_svc(mgr, url, fn, fn_data, mqtt_cb, NULL);
+  struct mg_connection *c =
+      mg_connect_svc(mgr, url, fn, fn_data, mqtt_cb, NULL);
   if (c != NULL) {
     struct mg_mqtt_opts empty;
     memset(&empty, 0, sizeof(empty));

src/mqtt.h

@@ -104,6 +104,7 @@ struct mg_connection *mg_mqtt_listen(struct mg_mgr *mgr, const char *url,
 void mg_mqtt_login(struct mg_connection *c, const struct mg_mqtt_opts *opts);
 uint16_t mg_mqtt_pub(struct mg_connection *c, const struct mg_mqtt_opts *opts);
 void mg_mqtt_sub(struct mg_connection *, const struct mg_mqtt_opts *opts);
+void mg_mqtt_unsub(struct mg_connection *c, const struct mg_mqtt_opts *opts);
 int mg_mqtt_parse(const uint8_t *, size_t, uint8_t, struct mg_mqtt_message *);
 void mg_mqtt_send_header(struct mg_connection *, uint8_t cmd, uint8_t flags,
                          uint32_t len);

src/net.c

@@ -9,8 +9,14 @@
 
 size_t mg_vprintf(struct mg_connection *c, const char *fmt, va_list *ap) {
   size_t old = c->send.len;
-  mg_vxprintf(mg_pfn_iobuf, &c->send, fmt, ap);
+  size_t expected = mg_vxprintf(mg_pfn_iobuf, &c->send, fmt, ap);
-  return c->send.len - old;
+  size_t actual = c->send.len - old;
+  if (actual != expected) {
+    mg_error(c, "OOM");
+    c->send.len = old;
+    actual = 0;
+  }
+  return actual;
 }
 
 size_t mg_printf(struct mg_connection *c, const char *fmt, ...) {
@@ -25,14 +31,14 @@ size_t mg_printf(struct mg_connection *c, const char *fmt, ...) {
 static bool mg_atonl(struct mg_str str, struct mg_addr *addr) {
   uint32_t localhost = mg_htonl(0x7f000001);
   if (mg_strcasecmp(str, mg_str("localhost")) != 0) return false;
-  memcpy(addr->ip, &localhost, sizeof(uint32_t));
+  memcpy(addr->addr.ip, &localhost, sizeof(uint32_t));
   addr->is_ip6 = false;
   return true;
 }
 
 static bool mg_atone(struct mg_str str, struct mg_addr *addr) {
   if (str.len > 0) return false;
-  memset(addr->ip, 0, sizeof(addr->ip));
+  memset(addr->addr.ip, 0, sizeof(addr->addr.ip));
   addr->is_ip6 = false;
   return true;
 }
@@ -53,7 +59,7 @@ static bool mg_aton4(struct mg_str str, struct mg_addr *addr) {
     }
   }
   if (num_dots != 3 || str.buf[i - 1] == '.') return false;
-  memcpy(&addr->ip, data, sizeof(data));
+  memcpy(&addr->addr.ip, data, sizeof(data));
   addr->is_ip6 = false;
   return true;
 }
@@ -68,10 +74,10 @@ static bool mg_v4mapped(struct mg_str str, struct mg_addr *addr) {
   }
   // struct mg_str s = mg_str_n(&str.buf[7], str.len - 7);
   if (!mg_aton4(mg_str_n(&str.buf[7], str.len - 7), addr)) return false;
-  memcpy(&ipv4, addr->ip, sizeof(ipv4));
+  memcpy(&ipv4, addr->addr.ip, sizeof(ipv4));
-  memset(addr->ip, 0, sizeof(addr->ip));
+  memset(addr->addr.ip, 0, sizeof(addr->addr.ip));
-  addr->ip[10] = addr->ip[11] = 255;
+  addr->addr.ip[10] = addr->addr.ip[11] = 255;
-  memcpy(&addr->ip[12], &ipv4, 4);
+  memcpy(&addr->addr.ip[12], &ipv4, 4);
   addr->is_ip6 = true;
   return true;
 }
@@ -80,7 +86,7 @@ static bool mg_aton6(struct mg_str str, struct mg_addr *addr) {
   size_t i, j = 0, n = 0, dc = 42;
   addr->scope_id = 0;
   if (str.len > 2 && str.buf[0] == '[') str.buf++, str.len -= 2;
-  if (mg_v4mapped(str, addr)) return true;
+  if (mg_v4mapped(str, addr)) return true;  // sets addr->is_ip6
   for (i = 0; i < str.len; i++) {
     if ((str.buf[i] >= '0' && str.buf[i] <= '9') ||
         (str.buf[i] >= 'a' && str.buf[i] <= 'f') ||
@@ -89,8 +95,8 @@ static bool mg_aton6(struct mg_str str, struct mg_addr *addr) {
       if (i > j + 3) return false;
       // MG_DEBUG(("%lu %lu [%.*s]", i, j, (int) (i - j + 1), &str.buf[j]));
       mg_str_to_num(mg_str_n(&str.buf[j], i - j + 1), 16, &val, sizeof(val));
-      addr->ip[n] = (uint8_t) ((val >> 8) & 255);
+      addr->addr.ip[n] = (uint8_t) ((val >> 8) & 255);
-      addr->ip[n + 1] = (uint8_t) (val & 255);
+      addr->addr.ip[n + 1] = (uint8_t) (val & 255);
     } else if (str.buf[i] == ':') {
       j = i + 1;
       if (i > 0 && str.buf[i - 1] == ':') {
@@ -100,18 +106,23 @@ static bool mg_aton6(struct mg_str str, struct mg_addr *addr) {
         n += 2;
       }
       if (n > 14) return false;
-      addr->ip[n] = addr->ip[n + 1] = 0;  // For trailing ::
+      addr->addr.ip[n] = addr->addr.ip[n + 1] = 0;  // For trailing ::
-    } else if (str.buf[i] == '%') {       // Scope ID, last in string
+    } else if (str.buf[i] == '%') {                 // Scope ID, last in string
-      return mg_str_to_num(mg_str_n(&str.buf[i + 1], str.len - i - 1), 10,
+      if (mg_str_to_num(mg_str_n(&str.buf[i + 1], str.len - i - 1), 10,
-                           &addr->scope_id, sizeof(uint8_t));
+                        &addr->scope_id, sizeof(uint8_t))) {
+        addr->is_ip6 = true;
+        return true;
+      } else {
+        return false;
+      }
     } else {
       return false;
     }
   }
   if (n < 14 && dc == 42) return false;
   if (n < 14) {
-    memmove(&addr->ip[dc + (14 - n)], &addr->ip[dc], n - dc + 2);
+    memmove(&addr->addr.ip[dc + (14 - n)], &addr->addr.ip[dc], n - dc + 2);
-    memset(&addr->ip[dc], 0, 14 - n);
+    memset(&addr->addr.ip[dc], 0, 14 - n);
   }
 
   addr->is_ip6 = true;
@@ -162,6 +173,10 @@ struct mg_connection *mg_connect_svc(struct mg_mgr *mgr, const char *url,
   struct mg_connection *c = NULL;
   if (url == NULL || url[0] == '\0') {
     MG_ERROR(("null url"));
+#if MG_ENABLE_TCPIP
+  } else if (mgr->ifp != NULL && mgr->ifp->state != MG_TCPIP_STATE_READY) {
+    MG_ERROR(("Network is down"));
+#endif
   } else if ((c = mg_alloc_conn(mgr)) == NULL) {
     MG_ERROR(("OOM"));
   } else {
@@ -295,3 +310,13 @@ void mg_mgr_init(struct mg_mgr *mgr) {
             : MG_TLS == MG_TLS_WOLFSSL ? "WolfSSL"
                                        : "custom"));
 }
+
+#if MG_ENABLE_TCPIP
+void mg_tcpip_mapip(struct mg_connection *, struct mg_addr *);
+#endif
+void mg_multicast_restore(struct mg_connection *c, uint8_t *from) {
+  memcpy(&c->rem, from, sizeof(c->rem));
+#if MG_ENABLE_TCPIP
+  mg_tcpip_mapip(c, &c->rem);
+#endif
+}

src/net.h

@@ -14,7 +14,11 @@ struct mg_dns {
 };
 
 struct mg_addr {
-  uint8_t ip[16];    // Holds IPv4 or IPv6 address, in network byte order
+  union {  // Holds IPv4 or IPv6 address, in network byte order
+    uint8_t ip[16];
+    uint32_t ip4;
+    uint64_t ip6[2];
+  } addr;
   uint16_t port;     // TCP or UDP port in network byte order
   uint8_t scope_id;  // IPv6 scope ID
   bool is_ip6;       // True when address is IPv6 address
@@ -108,3 +112,4 @@ struct mg_timer *mg_timer_add(struct mg_mgr *mgr, uint64_t milliseconds,
 struct mg_connection *mg_connect_svc(struct mg_mgr *mgr, const char *url,
                                      mg_event_handler_t fn, void *fn_data,
                                      mg_event_handler_t pfn, void *pfn_data);
+void mg_multicast_restore(struct mg_connection *c, uint8_t *from);

src/net_builtin.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "arch.h"
+#include "l2.h"
 #include "net.h"
 #include "queue.h"
 #include "str.h"
@@ -20,45 +21,58 @@ typedef void (*mg_tcpip_event_handler_t)(struct mg_tcpip_if *ifp, int ev,
                                          void *ev_data);
 
 enum {
-  MG_TCPIP_EV_ST_CHG,           // state change                   uint8_t * (&ifp->state)
+  MG_TCPIP_EV_ST_CHG,  // state change                   uint8_t * (&ifp->state)
-  MG_TCPIP_EV_DHCP_DNS,         // DHCP DNS assignment            uint32_t *ipaddr
+  MG_TCPIP_EV_DHCP_DNS,   // DHCP DNS assignment            uint32_t *ipaddr
-  MG_TCPIP_EV_DHCP_SNTP,        // DHCP SNTP assignment           uint32_t *ipaddr
+  MG_TCPIP_EV_DHCP_SNTP,  // DHCP SNTP assignment           uint32_t *ipaddr
-  MG_TCPIP_EV_ARP,              // Got ARP packet                 struct mg_str *
+  MG_TCPIP_EV_ARP,        // Got ARP packet                 struct mg_str *
-  MG_TCPIP_EV_TIMER_1S,         // 1 second timer                 NULL
+  MG_TCPIP_EV_TIMER_1S,   // 1 second timer                 NULL
-  MG_TCPIP_EV_WIFI_SCAN_RESULT, // Wi-Fi scan results             struct mg_wifi_scan_bss_data *
+  MG_TCPIP_EV_WIFI_SCAN_RESULT,  // Wi-Fi scan results             struct
-  MG_TCPIP_EV_WIFI_SCAN_END,    // Wi-Fi scan has finished        NULL
+                                 // mg_wifi_scan_bss_data *
-  MG_TCPIP_EV_WIFI_CONNECT_ERR, // Wi-Fi connect has failed       driver and chip specific
+  MG_TCPIP_EV_WIFI_SCAN_END,     // Wi-Fi scan has finished        NULL
-  MG_TCPIP_EV_DRIVER,           // Driver event                   driver specific
+  MG_TCPIP_EV_WIFI_CONNECT_ERR,  // Wi-Fi connect has failed       driver and
-  MG_TCPIP_EV_USER              // Starting ID for user events
+                                 // chip specific
+  MG_TCPIP_EV_DRIVER,   // Driver event                   driver specific
+  MG_TCPIP_EV_ST6_CHG,  // state6 change                  uint8_t *
+                        // (&ifp->state6)
+  MG_TCPIP_EV_USER      // Starting ID for user events
 };
 
-
 // Network interface
 struct mg_tcpip_if {
-  uint8_t mac[6];                  // MAC address. Must be set to a valid MAC
+  uint8_t mac[sizeof(struct mg_l2addr)];  // hw address. Set to a valid addr
-  uint32_t ip, mask, gw;           // IP address, mask, default gateway
+  uint32_t ip, mask, gw;                  // IP address, mask, default gateway
-  struct mg_str tx;                // Output (TX) buffer
+  struct mg_str tx;                       // Output (TX) buffer
-  bool enable_dhcp_client;         // Enable DCHP client
+  bool enable_dhcp_client;                // Enable DCHP client
-  bool enable_dhcp_server;         // Enable DCHP server
+  bool enable_dhcp_server;                // Enable DCHP server
-  bool enable_get_gateway;         // DCHP server sets client as gateway
+  bool enable_get_gateway;                // DCHP server sets client as gateway
-  bool enable_req_dns;             // DCHP client requests DNS server
+  bool enable_req_dns;                    // DCHP client requests DNS server
-  bool enable_req_sntp;            // DCHP client requests SNTP server
+  bool enable_req_sntp;                   // DCHP client requests SNTP server
   bool enable_crc32_check;         // Do a CRC check on RX frames and strip it
   bool enable_mac_check;           // Do a MAC check on RX frames
   bool update_mac_hash_table;      // Signal drivers to update MAC controller
   struct mg_tcpip_driver *driver;  // Low level driver
   void *driver_data;               // Driver-specific data
+  mg_tcpip_event_handler_t pfn;    // Driver-specific event handler function
   mg_tcpip_event_handler_t fn;     // User-specified event handler function
   struct mg_mgr *mgr;              // Mongoose event manager
   struct mg_queue recv_queue;      // Receive queue
-  char dhcp_name[12];              // Name reported to DHCP, "mip" if unset
+  char dhcp_name[MG_TCPIP_DHCPNAME_SIZE];  // Name for DHCP, "mip" if unset
-  uint16_t mtu;                    // Interface MTU
+  uint16_t mtu;                            // Interface link payload
-#define MG_TCPIP_MTU_DEFAULT 1500
+  uint16_t framesize;                      // Interface frame max length
+#if MG_ENABLE_IPV6
+  uint64_t ip6ll[2], ip6[2];  // IPv6 link-local and global addresses,
+  uint8_t prefix[8];          // prefix,
+  uint8_t prefix_len;         // prefix length,
+  uint64_t gw6[2];            // default gateway.
+  bool enable_slaac;          // Enable IPv6 address autoconfiguration
+  bool enable_dhcp6_client;   // Enable DCHPv6 client TODO()
+#endif
 
   // Internal state, user can use it but should not change it
-  uint8_t gwmac[6];             // Router's MAC
+  uint8_t gwmac[sizeof(struct mg_l2addr)];  // Router's hw address
-  char *dns4_url;               // DNS server URL
+  enum mg_l2type l2type;                    // Ethernet, PPP, etc.
-  uint64_t now;                 // Current time
+  char *dns4_url;                           // DNS server URL
+  uint64_t now;                             // Current time
   uint64_t timer_1000ms;        // 1000 ms timer: for DHCP and link state
   uint64_t lease_expire;        // Lease expiration time, in ms
   uint16_t eport;               // Next ephemeral port
@@ -66,12 +80,18 @@ struct mg_tcpip_if {
   volatile uint32_t nrecv;      // Number of received frames
   volatile uint32_t nsent;      // Number of transmitted frames
   volatile uint32_t nerr;       // Number of driver errors
-  uint8_t state;                // Current state
+  uint8_t state;                // Current link and IPv4 state
 #define MG_TCPIP_STATE_DOWN 0   // Interface is down
 #define MG_TCPIP_STATE_UP 1     // Interface is up
 #define MG_TCPIP_STATE_REQ 2    // Interface is up, DHCP REQUESTING state
 #define MG_TCPIP_STATE_IP 3     // Interface is up and has an IP assigned
 #define MG_TCPIP_STATE_READY 4  // Interface has fully come up, ready to work
+  bool gw_ready;                // We've got a hw address for the router
+#if MG_ENABLE_IPV6
+  uint8_t gw6mac[sizeof(struct mg_l2addr)];  // IPV6 Router's hw address
+  uint8_t state6;                            // Current IPv6 state
+  bool gw6_ready;  // We've got a hw address for the IPv6 router
+#endif
 };
 
 void mg_tcpip_init(struct mg_mgr *, struct mg_tcpip_if *);
@@ -95,6 +115,8 @@ extern struct mg_tcpip_driver mg_tcpip_driver_ppp;
 extern struct mg_tcpip_driver mg_tcpip_driver_pico_w;
 extern struct mg_tcpip_driver mg_tcpip_driver_rw612;
 extern struct mg_tcpip_driver mg_tcpip_driver_cyw;
+extern struct mg_tcpip_driver mg_tcpip_driver_nxp_wifi;
+extern struct mg_tcpip_driver mg_tcpip_driver_st67w6;
 
 // Drivers that require SPI, can use this SPI abstraction
 struct mg_tcpip_spi {
@@ -104,5 +126,41 @@ struct mg_tcpip_spi {
   uint8_t (*txn)(void *, uint8_t);  // SPI transaction: write 1 byte, read reply
 };
 
+// Alignment and memory section requirements
+#ifndef MG_8BYTE_ALIGNED
+#if defined(__GNUC__)
+#define MG_8BYTE_ALIGNED __attribute__((aligned((8U))))
+#else
+#define MG_8BYTE_ALIGNED
+#endif  // compiler
+#endif  // 8BYTE_ALIGNED
+
+#ifndef MG_16BYTE_ALIGNED
+#if defined(__GNUC__)
+#define MG_16BYTE_ALIGNED __attribute__((aligned((16U))))
+#else
+#define MG_16BYTE_ALIGNED
+#endif  // compiler
+#endif  // 16BYTE_ALIGNED
+
+#ifndef MG_32BYTE_ALIGNED
+#if defined(__GNUC__)
+#define MG_32BYTE_ALIGNED __attribute__((aligned((32U))))
+#else
+#define MG_32BYTE_ALIGNED
+#endif  // compiler
+#endif  // 32BYTE_ALIGNED
+
+#ifndef MG_64BYTE_ALIGNED
+#if defined(__GNUC__)
+#define MG_64BYTE_ALIGNED __attribute__((aligned((64U))))
+#else
+#define MG_64BYTE_ALIGNED
+#endif  // compiler
+#endif  // 64BYTE_ALIGNED
+
+#ifndef MG_ETH_RAM
+#define MG_ETH_RAM
+#endif
 
 #endif

src/ota.h

@@ -17,8 +17,8 @@
 #define MG_OTA_RT1060 302   // IMXRT1060
 #define MG_OTA_RT1064 303   // IMXRT1064
 #define MG_OTA_RT1170 304   // IMXRT1170
-#define MG_OTA_MCXN 310 	  // MCXN947
+#define MG_OTA_MCXN 310 	// MCXN947
-#define MG_OTA_FRDM 320    // FRDM-RW612
+#define MG_OTA_RW612 320    // FRDM-RW612
 #define MG_OTA_FLASH 900    // OTA via an internal flash
 #define MG_OTA_ESP32 910    // ESP32 OTA implementation
 #define MG_OTA_PICOSDK 920  // RP2040/2350 using Pico-SDK hardware_flash

src/ota_rw612.c

@@ -2,7 +2,7 @@
 #include "log.h"
 #include "ota.h"
 
-#if MG_OTA == MG_OTA_FRDM
+#if MG_OTA == MG_OTA_RW612
 
 MG_IRAM static bool mg_frdm_write(void *, const void *, size_t);
 static bool mg_frdm_swap(void);

src/printf.c

@@ -1,25 +1,20 @@
-#include "printf.h"
 #include "fmt.h"
+#include "printf.h"
 #include "util.h"
 
-size_t mg_queue_vprintf(struct mg_queue *q, const char *fmt, va_list *ap) {
-  size_t len = mg_snprintf(NULL, 0, fmt, ap);
-  char *buf;
-  if (len == 0 || mg_queue_book(q, &buf, len + 1) < len + 1) {
-    len = 0;  // Nah. Not enough space
-  } else {
-    len = mg_vsnprintf((char *) buf, len + 1, fmt, ap);
-    mg_queue_add(q, len);
-  }
-  return len;
-}
-
 size_t mg_queue_printf(struct mg_queue *q, const char *fmt, ...) {
-  va_list ap;
+  char *buf;
   size_t len;
-  va_start(ap, fmt);
+  va_list ap1, ap2;
-  len = mg_queue_vprintf(q, fmt, &ap);
+  va_start(ap1, fmt);
-  va_end(ap);
+  len = mg_vsnprintf(NULL, 0, fmt, &ap1);
+  va_end(ap1);
+  if (len == 0 || mg_queue_book(q, &buf, len + 1) < len + 1)
+    return 0;  // Nah. Not enough space
+  va_start(ap2, fmt);
+  len = mg_vsnprintf(buf, len + 1, fmt, &ap2);
+  mg_queue_add(q, len);
+  va_end(ap2);
   return len;
 }
 
@@ -34,7 +29,7 @@ static void mg_pfn_iobuf_private(char ch, void *param, bool expand) {
   }
 }
 
-static void mg_putchar_iobuf_static(char ch, void *param) {
+void mg_pfn_iobuf_noresize(char ch, void *param) {
   mg_pfn_iobuf_private(ch, param, false);
 }
 
@@ -43,8 +38,10 @@ void mg_pfn_iobuf(char ch, void *param) {
 }
 
 size_t mg_vsnprintf(char *buf, size_t len, const char *fmt, va_list *ap) {
-  struct mg_iobuf io = {(uint8_t *) buf, len, 0, 0};
+  struct mg_iobuf io = {0, 0, 0, 0};
-  size_t n = mg_vxprintf(mg_putchar_iobuf_static, &io, fmt, ap);
+  size_t n;
+  io.buf = (uint8_t *) buf, io.size = len;
+  n = mg_vxprintf(mg_pfn_iobuf_noresize, &io, fmt, ap);
   if (n < len) buf[n] = '\0';
   return n;
 }
@@ -101,8 +98,8 @@ size_t mg_print_ip6(void (*out)(char, void *), void *arg, va_list *ap) {
 
 size_t mg_print_ip(void (*out)(char, void *), void *arg, va_list *ap) {
   struct mg_addr *addr = va_arg(*ap, struct mg_addr *);
-  if (addr->is_ip6) return print_ip6(out, arg, (uint16_t *) addr->ip);
+  if (addr->is_ip6) return print_ip6(out, arg, (uint16_t *) addr->addr.ip);
-  return print_ip4(out, arg, (uint8_t *) &addr->ip);
+  return print_ip4(out, arg, (uint8_t *) &addr->addr.ip);
 }
 
 size_t mg_print_ip_port(void (*out)(char, void *), void *arg, va_list *ap) {
@@ -110,12 +107,27 @@ size_t mg_print_ip_port(void (*out)(char, void *), void *arg, va_list *ap) {
   return mg_xprintf(out, arg, "%M:%hu", mg_print_ip, a, mg_ntohs(a->port));
 }
 
-size_t mg_print_mac(void (*out)(char, void *), void *arg, va_list *ap) {
+static size_t print_mac(void (*out)(char, void *), void *arg, uint8_t *p) {
-  uint8_t *p = va_arg(*ap, uint8_t *);
   return mg_xprintf(out, arg, "%02x:%02x:%02x:%02x:%02x:%02x", p[0], p[1], p[2],
                     p[3], p[4], p[5]);
 }
 
+size_t mg_print_mac(void (*out)(char, void *), void *arg, va_list *ap) {
+  uint8_t *p = va_arg(*ap, uint8_t *);
+  return print_mac(out, arg, p);
+}
+
+#if MG_ENABLE_TCPIP
+size_t mg_print_l2addr(void (*out)(char, void *), void *arg, va_list *ap) {
+  enum mg_l2type type = (enum mg_l2type) va_arg(*ap, int);
+  if (type == MG_TCPIP_L2_ETH) {
+    uint8_t *p = va_arg(*ap, uint8_t *);
+    return print_mac(out, arg, p);
+  }
+  return 0;
+}
+#endif
+
 static char mg_esc(int c, bool esc) {
   const char *p, *esc1 = "\b\f\n\r\t\\\"", *esc2 = "bfnrt\\\"";
   for (p = esc ? esc1 : esc2; *p != '\0'; p++) {
@@ -150,7 +162,8 @@ static size_t bcpy(void (*out)(char, void *), void *arg, uint8_t *buf,
   for (i = 0; i < len; i += 3) {
     uint8_t c1 = buf[i], c2 = i + 1 < len ? buf[i + 1] : 0,
             c3 = i + 2 < len ? buf[i + 2] : 0;
-    char tmp[4] = {t[c1 >> 2], t[(c1 & 3) << 4 | (c2 >> 4)], '=', '='};
+    char tmp[4] = {0, 0, '=', '='};
+    tmp[0] = t[c1 >> 2], tmp[1] = t[(c1 & 3) << 4 | (c2 >> 4)];
     if (i + 1 < len) tmp[2] = t[(c2 & 15) << 2 | (c3 >> 6)];
     if (i + 2 < len) tmp[3] = t[c3 & 63];
     for (j = 0; j < sizeof(tmp) && tmp[j] != '\0'; j++) out(tmp[j], arg);

src/printf.h

@@ -9,7 +9,6 @@ size_t mg_vsnprintf(char *buf, size_t len, const char *fmt, va_list *ap);
 size_t mg_snprintf(char *, size_t, const char *fmt, ...);
 char *mg_vmprintf(const char *fmt, va_list *ap);
 char *mg_mprintf(const char *fmt, ...);
-size_t mg_queue_vprintf(struct mg_queue *, const char *fmt, va_list *);
 size_t mg_queue_printf(struct mg_queue *, const char *fmt, ...);
 
 // %M print helper functions
@@ -21,10 +20,12 @@ size_t mg_print_ip_port(void (*out)(char, void *), void *arg, va_list *ap);
 size_t mg_print_ip4(void (*out)(char, void *), void *arg, va_list *ap);
 size_t mg_print_ip6(void (*out)(char, void *), void *arg, va_list *ap);
 size_t mg_print_mac(void (*out)(char, void *), void *arg, va_list *ap);
+size_t mg_print_l2addr(void (*out)(char, void *), void *arg, va_list *ap);
 
 // Various output functions
-void mg_pfn_iobuf(char ch, void *param);  // param: struct mg_iobuf *
+void mg_pfn_iobuf(char ch, void *param);           // param: struct mg_iobuf *
-void mg_pfn_stdout(char c, void *param);  // param: ignored
+void mg_pfn_iobuf_noresize(char ch, void *param);  // param: struct mg_iobuf *
+void mg_pfn_stdout(char c, void *param);           // param: ignored
 
 // A helper macro for printing JSON: mg_snprintf(buf, len, "%m", MG_ESC("hi"))
 #define MG_ESC(str) mg_print_esc, 0, (str)

src/sha256.c

@@ -180,6 +180,35 @@ void mg_hmac_sha256(uint8_t dst[32], uint8_t *key, size_t keysz, uint8_t *data,
 #define sig164(x) (rotr64(x, 19) ^ rotr64(x, 61) ^ ((x) >> 6))
 
 static const uint64_t mg_sha256_k2[80] = {
+#if defined(__DCC__)
+    0x428a2f98d728ae22ull, 0x7137449123ef65cdull, 0xb5c0fbcfec4d3b2full,
+    0xe9b5dba58189dbbcull, 0x3956c25bf348b538ull, 0x59f111f1b605d019ull,
+    0x923f82a4af194f9bull, 0xab1c5ed5da6d8118ull, 0xd807aa98a3030242ull,
+    0x12835b0145706fbeull, 0x243185be4ee4b28cull, 0x550c7dc3d5ffb4e2ull,
+    0x72be5d74f27b896full, 0x80deb1fe3b1696b1ull, 0x9bdc06a725c71235ull,
+    0xc19bf174cf692694ull, 0xe49b69c19ef14ad2ull, 0xefbe4786384f25e3ull,
+    0x0fc19dc68b8cd5b5ull, 0x240ca1cc77ac9c65ull, 0x2de92c6f592b0275ull,
+    0x4a7484aa6ea6e483ull, 0x5cb0a9dcbd41fbd4ull, 0x76f988da831153b5ull,
+    0x983e5152ee66dfabull, 0xa831c66d2db43210ull, 0xb00327c898fb213full,
+    0xbf597fc7beef0ee4ull, 0xc6e00bf33da88fc2ull, 0xd5a79147930aa725ull,
+    0x06ca6351e003826full, 0x142929670a0e6e70ull, 0x27b70a8546d22ffcull,
+    0x2e1b21385c26c926ull, 0x4d2c6dfc5ac42aedull, 0x53380d139d95b3dfull,
+    0x650a73548baf63deull, 0x766a0abb3c77b2a8ull, 0x81c2c92e47edaee6ull,
+    0x92722c851482353bull, 0xa2bfe8a14cf10364ull, 0xa81a664bbc423001ull,
+    0xc24b8b70d0f89791ull, 0xc76c51a30654be30ull, 0xd192e819d6ef5218ull,
+    0xd69906245565a910ull, 0xf40e35855771202aull, 0x106aa07032bbd1b8ull,
+    0x19a4c116b8d2d0c8ull, 0x1e376c085141ab53ull, 0x2748774cdf8eeb99ull,
+    0x34b0bcb5e19b48a8ull, 0x391c0cb3c5c95a63ull, 0x4ed8aa4ae3418acbull,
+    0x5b9cca4f7763e373ull, 0x682e6ff3d6b2b8a3ull, 0x748f82ee5defb2fcull,
+    0x78a5636f43172f60ull, 0x84c87814a1f0ab72ull, 0x8cc702081a6439ecull,
+    0x90befffa23631e28ull, 0xa4506cebde82bde9ull, 0xbef9a3f7b2c67915ull,
+    0xc67178f2e372532bull, 0xca273eceea26619cull, 0xd186b8c721c0c207ull,
+    0xeada7dd6cde0eb1eull, 0xf57d4f7fee6ed178ull, 0x06f067aa72176fbaull,
+    0x0a637dc5a2c898a6ull, 0x113f9804bef90daeull, 0x1b710b35131c471bull,
+    0x28db77f523047d84ull, 0x32caab7b40c72493ull, 0x3c9ebe0a15c9bebcull,
+    0x431d67c49c100d4cull, 0x4cc5d4becb3e42b6ull, 0x597f299cfc657e2aull,
+    0x5fcb6fab3ad6faecull, 0x6c44198c4a475817ull
+#else
     0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f,
     0xe9b5dba58189dbbc, 0x3956c25bf348b538, 0x59f111f1b605d019,
     0x923f82a4af194f9b, 0xab1c5ed5da6d8118, 0xd807aa98a3030242,
@@ -206,7 +235,9 @@ static const uint64_t mg_sha256_k2[80] = {
     0x0a637dc5a2c898a6, 0x113f9804bef90dae, 0x1b710b35131c471b,
     0x28db77f523047d84, 0x32caab7b40c72493, 0x3c9ebe0a15c9bebc,
     0x431d67c49c100d4c, 0x4cc5d4becb3e42b6, 0x597f299cfc657e2a,
-    0x5fcb6fab3ad6faec, 0x6c44198c4a475817};
+    0x5fcb6fab3ad6faec, 0x6c44198c4a475817
+#endif
+};
 
 static void mg_sha384_transform(mg_sha384_ctx *ctx, const uint8_t data[]) {
   uint64_t m[80];
@@ -257,6 +288,16 @@ void mg_sha384_init(mg_sha384_ctx *ctx) {
   ctx->datalen = 0;
   ctx->bitlen[0] = 0;
   ctx->bitlen[1] = 0;
+#if defined(__DCC__)
+  ctx->state[0] = 0xcbbb9d5dc1059ed8ull;
+  ctx->state[1] = 0x629a292a367cd507ull;
+  ctx->state[2] = 0x9159015a3070dd17ull;
+  ctx->state[3] = 0x152fecd8f70e5939ull;
+  ctx->state[4] = 0x67332667ffc00b31ull;
+  ctx->state[5] = 0x8eb44a8768581511ull;
+  ctx->state[6] = 0xdb0c2e0d64f98fa7ull;
+  ctx->state[7] = 0x47b5481dbefa4fa4ull;
+#else
   ctx->state[0] = 0xcbbb9d5dc1059ed8;
   ctx->state[1] = 0x629a292a367cd507;
   ctx->state[2] = 0x9159015a3070dd17;
@@ -265,6 +306,7 @@ void mg_sha384_init(mg_sha384_ctx *ctx) {
   ctx->state[5] = 0x8eb44a8768581511;
   ctx->state[6] = 0xdb0c2e0d64f98fa7;
   ctx->state[7] = 0x47b5481dbefa4fa4;
+#endif
 }
 
 void mg_sha384_update(mg_sha384_ctx *ctx, const uint8_t *data, size_t len) {

src/sock.c

@@ -57,13 +57,13 @@ static socklen_t tousa(struct mg_addr *a, union usa *usa) {
   memset(usa, 0, sizeof(*usa));
   usa->sin.sin_family = AF_INET;
   usa->sin.sin_port = a->port;
-  memcpy(&usa->sin.sin_addr, a->ip, sizeof(uint32_t));
+  memcpy(&usa->sin.sin_addr, a->addr.ip, sizeof(uint32_t));
 #if MG_ENABLE_IPV6
   if (a->is_ip6) {
     usa->sin.sin_family = AF_INET6;
     usa->sin6.sin6_port = a->port;
     usa->sin6.sin6_scope_id = a->scope_id;
-    memcpy(&usa->sin6.sin6_addr, a->ip, sizeof(a->ip));
+    memcpy(&usa->sin6.sin6_addr, a->addr.ip, sizeof(a->addr.ip));
     len = sizeof(usa->sin6);
   }
 #endif
@@ -72,15 +72,17 @@ static socklen_t tousa(struct mg_addr *a, union usa *usa) {
 
 static void tomgaddr(union usa *usa, struct mg_addr *a, bool is_ip6) {
   a->is_ip6 = is_ip6;
-  a->port = usa->sin.sin_port;
-  memcpy(&a->ip, &usa->sin.sin_addr, sizeof(uint32_t));
 #if MG_ENABLE_IPV6
   if (is_ip6) {
-    memcpy(a->ip, &usa->sin6.sin6_addr, sizeof(a->ip));
+    memcpy(a->addr.ip, &usa->sin6.sin6_addr, sizeof(a->addr.ip));
     a->port = usa->sin6.sin6_port;
     a->scope_id = (uint8_t) usa->sin6.sin6_scope_id;
-  }
+  } else
 #endif
+  {
+    a->port = usa->sin.sin_port;
+    memcpy(&a->addr.ip, &usa->sin.sin_addr, sizeof(uint32_t));
+  }
 }
 
 static void setlocaddr(MG_SOCKET_TYPE fd, struct mg_addr *addr) {
@@ -91,6 +93,29 @@ static void setlocaddr(MG_SOCKET_TYPE fd, struct mg_addr *addr) {
   }
 }
 
+// Get the local 'addr' the stack will use to connect to 'to'
+void mg_getlocaddr(struct mg_connection *c, struct mg_addr *to, struct mg_addr *addr);
+void mg_getlocaddr(struct mg_connection *c, struct mg_addr *to, struct mg_addr *addr) {
+  union usa usa;
+  socklen_t slen;
+  MG_SOCKET_TYPE fd;
+  int rc, af = to->is_ip6 ? AF_INET6 : AF_INET;
+  fd = socket(af, SOCK_DGRAM, IPPROTO_UDP);
+  if (fd == MG_INVALID_SOCKET) {
+    mg_error(c, "socket(): %d", MG_SOCK_ERR(-1));
+    return;
+  }
+  // NOTE(): TI-RTOS NDK may require binding
+  slen = tousa(to, &usa);
+  if ((rc = connect(fd, &usa.sa, slen)) != 0) {
+    mg_error(c, "connect: %d", MG_SOCK_ERR(rc));
+    return;
+  }
+  setlocaddr(fd, addr);
+  closesocket(fd);
+}
+
+
 static void iolog(struct mg_connection *c, char *buf, long n, bool r) {
   if (n == MG_IO_WAIT) {
     // Do nothing
@@ -141,7 +166,9 @@ bool mg_send(struct mg_connection *c, const void *buf, size_t len) {
     iolog(c, (char *) buf, n, false);
     return n > 0;
   } else {
-    return mg_iobuf_add(&c->send, c->send.len, buf, len);
+    return len == 0 || mg_iobuf_add(&c->send, c->send.len, buf, len) > 0;
+    // returning 0 means an OOM condition (iobuf couldn't resize), yet this is
+    // so far recoverable, let the caller decide
   }
 }
 
@@ -163,7 +190,7 @@ static void mg_set_non_blocking_mode(MG_SOCKET_TYPE fd) {
 #elif MG_ARCH == MG_ARCH_THREADX
   // NetxDuo fails to send large blocks of data to the non-blocking sockets
   (void) fd;
-  //fcntl(fd, F_SETFL, O_NONBLOCK);
+  // fcntl(fd, F_SETFL, O_NONBLOCK);
 #elif MG_ARCH == MG_ARCH_TIRTOS
   int val = 0;
   setsockopt(fd, SOL_SOCKET, SO_BLOCKING, &val, sizeof(val));
@@ -181,7 +208,7 @@ static void mg_set_non_blocking_mode(MG_SOCKET_TYPE fd) {
 void mg_multicast_add(struct mg_connection *c, char *ip);
 void mg_multicast_add(struct mg_connection *c, char *ip) {
 #if MG_ENABLE_RL
-#error UNSUPPORTED
+  MG_ERROR(("unsupported"));
 #elif MG_ENABLE_FREERTOS_TCP
   // TODO(): prvAllowIPPacketIPv4()
 #else
@@ -195,9 +222,10 @@ void mg_multicast_add(struct mg_connection *c, char *ip) {
   struct ip_mreq mreq;
   mreq.imr_multiaddr.s_addr = inet_addr(ip);
   mreq.imr_interface.s_addr = mg_htonl(INADDR_ANY);
-  setsockopt(FD(c), IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *) &mreq, sizeof(mreq));
+  setsockopt(FD(c), IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *) &mreq,
-#endif // !Zephyr
+             sizeof(mreq));
-#endif // !lwIP
+#endif  // !Zephyr
+#endif  // !lwIP
 #endif
 }
 
@@ -315,9 +343,9 @@ static void read_conn(struct mg_connection *c) {
       if (n == MG_IO_ERR || n == MG_IO_RESET) {  // Windows, see #3031
         if (c->rtls.len == 0 || m < 0) {
           // Close only when we have fully drained both rtls and TLS buffers
-          c->is_closing = 1;  // or there's nothing we can do about it.
+          c->is_closing = 1;         // or there's nothing we can do about it.
-          if (m < 0) m = MG_IO_ERR; // but return last record data, see #3104
+          if (m < 0) m = MG_IO_ERR;  // but return last record data, see #3104
-        } else { // see #2885
+        } else {                     // see #2885
           // TLS buffer is capped to max record size, even though, there can
           // be more than one record, give TLS a chance to process them.
         }
@@ -338,6 +366,7 @@ static void write_conn(struct mg_connection *c) {
   char *buf = (char *) c->send.buf;
   size_t len = c->send.len;
   long n = c->is_tls ? mg_tls_send(c, buf, len) : mg_io_send(c, buf, len);
+  // TODO(): mg_tls_send() may return 0 forever on steady OOM
   MG_DEBUG(("%lu %ld snd %ld/%ld rcv %ld/%ld n=%ld err=%d", c->id, c->fd,
             (long) c->send.len, (long) c->send.size, (long) c->recv.len,
             (long) c->recv.size, n, MG_SOCK_ERR(n)));
@@ -367,7 +396,7 @@ static void connect_conn(struct mg_connection *c) {
     mg_call(c, MG_EV_CONNECT, NULL);
     MG_EPOLL_MOD(c, 0);
     if (c->is_tls_hs) mg_tls_handshake(c);
-    if (!c->is_tls_hs) c->is_tls = 0; // user did not call mg_tls_init()
+    if (!c->is_tls_hs) c->is_tls = 0;  // user did not call mg_tls_init()
   } else {
     mg_error(c, "socket error");
   }
@@ -419,9 +448,9 @@ void mg_connect_resolved(struct mg_connection *c) {
     rc = connect(FD(c), &usa.sa, slen);  // Attempt to connect
     if (rc == 0) {                       // Success
       setlocaddr(FD(c), &c->loc);
-      mg_call(c, MG_EV_CONNECT, NULL);  // Send MG_EV_CONNECT to the user
+      mg_call(c, MG_EV_CONNECT, NULL);   // Send MG_EV_CONNECT to the user
-      if (!c->is_tls_hs) c->is_tls = 0; // user did not call mg_tls_init()
+      if (!c->is_tls_hs) c->is_tls = 0;  // user did not call mg_tls_init()
-    } else if (MG_SOCK_PENDING(rc)) {   // Need to wait for TCP handshake
+    } else if (MG_SOCK_PENDING(rc)) {    // Need to wait for TCP handshake
       MG_DEBUG(("%lu %ld -> %M pend", c->id, c->fd, mg_print_ip_port, &c->rem));
       c->is_connecting = 1;
     } else {
@@ -471,7 +500,7 @@ static void accept_conn(struct mg_mgr *mgr, struct mg_connection *lsn) {
     setsockopts(c);
     c->is_accepted = 1;
     c->is_hexdumping = lsn->is_hexdumping;
-    c->loc = lsn->loc;
+    setlocaddr(fd, &c->loc); // set local addr to where the client connected to
     c->pfn = lsn->pfn;
     c->pfn_data = lsn->pfn_data;
     c->fn = lsn->fn;
@@ -481,7 +510,7 @@ static void accept_conn(struct mg_mgr *mgr, struct mg_connection *lsn) {
               &c->rem, mg_print_ip_port, &c->loc));
     mg_call(c, MG_EV_OPEN, NULL);
     mg_call(c, MG_EV_ACCEPT, NULL);
-    if (!c->is_tls_hs) c->is_tls = 0; // user did not call mg_tls_init()
+    if (!c->is_tls_hs) c->is_tls = 0;  // user did not call mg_tls_init()
   }
 }
 

src/ssi.c

@@ -1,6 +1,6 @@
+#include "ssi.h"
 #include "log.h"
 #include "printf.h"
-#include "ssi.h"
 #include "util.h"
 
 #ifndef MG_MAX_SSI_DEPTH
@@ -31,31 +31,35 @@ static char *mg_ssi(const char *path, const char *root, int depth) {
           mg_snprintf(tmp, sizeof(tmp), "%.*s%s", (int) (p - path), path, arg);
           if (depth < MG_MAX_SSI_DEPTH &&
               (data = mg_ssi(tmp, root, depth + 1)) != NULL) {
-            mg_iobuf_add(&b, b.len, data, strlen(data));
+            size_t datalen = strlen(data);
+            size_t ret = mg_iobuf_add(&b, b.len, data, datalen);
             mg_free(data);
+            if (datalen > 0 && ret == 0) goto fail;
           } else {
             MG_ERROR(("%s: file=%s error or too deep", path, arg));
-          }
+          } // TODO(): or OOM at recursive call
         } else if (sscanf(buf, "<!--#include virtual=\"%[^\"]", arg) > 0) {
           char tmp[MG_PATH_MAX + MG_SSI_BUFSIZ + 10], *data;
           mg_snprintf(tmp, sizeof(tmp), "%s%s", root, arg);
           if (depth < MG_MAX_SSI_DEPTH &&
               (data = mg_ssi(tmp, root, depth + 1)) != NULL) {
-            mg_iobuf_add(&b, b.len, data, strlen(data));
+            size_t datalen = strlen(data);
+            size_t ret = mg_iobuf_add(&b, b.len, data, datalen);
             mg_free(data);
+            if (datalen > 0 && ret == 0) goto fail;
           } else {
             MG_ERROR(("%s: virtual=%s error or too deep", path, arg));
-          }
+          } // TODO(): or OOM at recursive call
         } else {
           // Unknown SSI tag
           MG_ERROR(("Unknown SSI tag: %.*s", (int) len, buf));
-          mg_iobuf_add(&b, b.len, buf, len);
+          if (len > 0 && mg_iobuf_add(&b, b.len, buf, len) == 0) goto fail;
         }
         intag = 0;
         len = 0;
       } else if (ch == '<') {
         intag = 1;
-        if (len > 0) mg_iobuf_add(&b, b.len, buf, len);
+        if (len > 0 && mg_iobuf_add(&b, b.len, buf, len) == 0) goto fail;
         len = 0;
         buf[len++] = (char) (ch & 0xff);
       } else if (intag) {
@@ -69,24 +73,33 @@ static char *mg_ssi(const char *path, const char *root, int depth) {
       } else {
         buf[len++] = (char) (ch & 0xff);
         if (len >= sizeof(buf)) {
-          mg_iobuf_add(&b, b.len, buf, len);
+          if (mg_iobuf_add(&b, b.len, buf, len) == 0) goto fail;
           len = 0;
         }
       }
     }
-    if (len > 0) mg_iobuf_add(&b, b.len, buf, len);
+    if (len > 0 && mg_iobuf_add(&b, b.len, buf, len) == 0) goto fail;
-    if (b.len > 0) mg_iobuf_add(&b, b.len, "", 1);  // nul-terminate
+    if (b.len > 0 && mg_iobuf_add(&b, b.len, "", 1) == 0)  // nul-terminate
+      goto fail;
     fclose(fp);
   }
   (void) depth;
   (void) root;
   return (char *) b.buf;
+
+fail:
+  fclose(fp);
+  return NULL;
 }
 
 void mg_http_serve_ssi(struct mg_connection *c, const char *root,
                        const char *fullpath) {
   const char *headers = "Content-Type: text/html; charset=utf-8\r\n";
   char *data = mg_ssi(fullpath, root, 0);
+  if (data == NULL) {
+    mg_error(c, "OOM");
+    return;
+  }
   mg_http_reply(c, 200, headers, "%s", data == NULL ? "" : data);
   mg_free(data);
 }

src/str.c

@@ -2,12 +2,14 @@
 #include "util.h"
 
 struct mg_str mg_str_s(const char *s) {
-  struct mg_str str = {(char *) s, s == NULL ? 0 : strlen(s)};
+  struct mg_str str;
+  str.buf = (char *) s, str.len = (s == NULL) ? 0 : strlen(s);
   return str;
 }
 
 struct mg_str mg_str_n(const char *s, size_t n) {
-  struct mg_str str = {(char *) s, n};
+  struct mg_str str;
+  str.buf = (char *) s, str.len = n;
   return str;
 }
 
@@ -85,7 +87,9 @@ bool mg_match(struct mg_str s, struct mg_str p, struct mg_str *caps) {
     } else if (i < p.len && (p.buf[i] == '*' || p.buf[i] == '#')) {
       if (caps && !caps->buf) caps->len = 0, caps->buf = &s.buf[j];  // Init cap
       ni = i++, nj = j + 1;
-    } else if (nj > 0 && nj <= s.len && (p.buf[ni] == '#' || s.buf[j] != '/')) {
+    } else if (nj > 0 && nj <= s.len &&
+               ((ni < p.len && p.buf[ni] == '#') ||
+                (j < s.len && s.buf[j] != '/'))) {
       i = ni, j = nj;
       if (caps && caps->buf == NULL && caps->len == 0) {
         caps--, caps->len = 0;  // Restart previous cap
@@ -166,8 +170,7 @@ bool mg_str_to_num(struct mg_str str, int base, void *val, size_t val_len) {
         i++, ndigits++;
       }
       break;
-    default:
+    default: return false;
-      return false;
   }
   if (ndigits == 0) return false;
   if (i != str.len) return false;

src/tls.h

@@ -34,6 +34,7 @@ void mg_tls_handshake(struct mg_connection *);
 // Private
 void mg_tls_ctx_init(struct mg_mgr *);
 void mg_tls_ctx_free(struct mg_mgr *);
+#define MG_IS_DER(buf) (((uint8_t *) (buf))[0] == 0x30)  // DER begins with 0x30
 
 // Low-level IO primives used by TLS layer
 enum { MG_IO_ERR = -1, MG_IO_WAIT = -2, MG_IO_RESET = -3 };

src/tls_aes128.c

@@ -40,45 +40,47 @@ static void aes_init_keygen_tables(void);
 /******************************************************************************
  *  AES_SETKEY : called to expand the key for encryption or decryption
  ******************************************************************************/
-static int aes_setkey(aes_context *ctx,  // pointer to context
+static int aes_setkey(
-                      int mode,          // 1 or 0 for Encrypt/Decrypt
+    aes_context *ctx,          // pointer to context
-                      const unsigned char *key,  // AES input key
+    int mode,                  // 1 or 0 for Encrypt/Decrypt
-                      unsigned int keysize);  // size in bytes (must be 16, 24, 32 for
+    const unsigned char *key,  // AES input key
-                                      // 128, 192 or 256-bit keys respectively)
+    unsigned int keysize);     // size in bytes (must be 16, 24, 32 for
-                                      // returns 0 for success
+                               // 128, 192 or 256-bit keys respectively)
+                               // returns 0 for success
 
 /******************************************************************************
  *  AES_CIPHER : called to encrypt or decrypt ONE 128-bit block of data
  ******************************************************************************/
-static int aes_cipher(aes_context *ctx,       // pointer to context
+static int aes_cipher(
-                      const unsigned char input[16],  // 128-bit block to en/decipher
+    aes_context *ctx,               // pointer to context
-                      unsigned char output[16]);      // 128-bit output result block
+    const unsigned char input[16],  // 128-bit block to en/decipher
-                                              // returns 0 for success
+    unsigned char output[16]);      // 128-bit output result block
+                                    // returns 0 for success
 
 /******************************************************************************
  *  GCM_CONTEXT : GCM context / holds keytables, instance data, and AES ctx
  ******************************************************************************/
 typedef struct {
-  int mode;             // cipher direction: encrypt/decrypt
+  int mode;                     // cipher direction: encrypt/decrypt
-  uint64_t len;         // cipher data length processed so far
+  uint64_t len;                 // cipher data length processed so far
-  uint64_t add_len;     // total add data length
+  uint64_t add_len;             // total add data length
-  uint64_t HL[16];      // precalculated lo-half HTable
+  uint64_t HL[16];              // precalculated lo-half HTable
-  uint64_t HH[16];      // precalculated hi-half HTable
+  uint64_t HH[16];              // precalculated hi-half HTable
   unsigned char base_ectr[16];  // first counter-mode cipher output for tag
   unsigned char y[16];          // the current cipher-input IV|Counter value
   unsigned char buf[16];        // buf working value
-  aes_context aes_ctx;  // cipher context used
+  aes_context aes_ctx;          // cipher context used
 } gcm_context;
 
 /******************************************************************************
  *  GCM_SETKEY : sets the GCM (and AES) keying material for use
  ******************************************************************************/
 static int gcm_setkey(
-    gcm_context *ctx,   // caller-provided context ptr
+    gcm_context *ctx,           // caller-provided context ptr
     const unsigned char *key,   // pointer to cipher key
     const unsigned int keysize  // size in bytes (must be 16, 24, 32 for
-                        // 128, 192 or 256-bit keys respectively)
+                                // 128, 192 or 256-bit keys respectively)
-);                      // returns 0 for success
+);                              // returns 0 for success
 
 /******************************************************************************
  *
@@ -98,17 +100,17 @@ static int gcm_setkey(
  *
  ******************************************************************************/
 static int gcm_crypt_and_tag(
-    gcm_context *ctx,    // gcm context with key already setup
+    gcm_context *ctx,  // gcm context with key already setup
-    int mode,            // cipher direction: MG_ENCRYPT (1) or MG_DECRYPT (0)
+    int mode,          // cipher direction: MG_ENCRYPT (1) or MG_DECRYPT (0)
     const unsigned char *iv,     // pointer to the 12-byte initialization vector
-    size_t iv_len,       // byte length if the IV. should always be 12
+    size_t iv_len,               // byte length if the IV. should always be 12
     const unsigned char *add,    // pointer to the non-ciphered additional data
-    size_t add_len,      // byte length of the additional AEAD data
+    size_t add_len,              // byte length of the additional AEAD data
     const unsigned char *input,  // pointer to the cipher data source
     unsigned char *output,       // pointer to the cipher data destination
-    size_t length,       // byte length of the cipher data
+    size_t length,               // byte length of the cipher data
     unsigned char *tag,          // pointer to the tag to be generated
-    size_t tag_len);     // byte length of the tag to be generated
+    size_t tag_len);             // byte length of the tag to be generated
 
 /******************************************************************************
  *
@@ -119,12 +121,12 @@ static int gcm_crypt_and_tag(
  *
  ******************************************************************************/
 static int gcm_start(
-    gcm_context *ctx,  // pointer to user-provided GCM context
+    gcm_context *ctx,          // pointer to user-provided GCM context
-    int mode,          // MG_ENCRYPT (1) or MG_DECRYPT (0)
+    int mode,                  // MG_ENCRYPT (1) or MG_DECRYPT (0)
     const unsigned char *iv,   // pointer to initialization vector
-    size_t iv_len,     // IV length in bytes (should == 12)
+    size_t iv_len,             // IV length in bytes (should == 12)
     const unsigned char *add,  // pointer to additional AEAD data (NULL if none)
-    size_t add_len);   // length of additional AEAD data (bytes)
+    size_t add_len);           // length of additional AEAD data (bytes)
 
 /******************************************************************************
  *
@@ -140,7 +142,7 @@ static int gcm_start(
 static int gcm_update(gcm_context *ctx,  // pointer to user-provided GCM context
                       size_t length,     // length, in bytes, of data to process
                       const unsigned char *input,  // pointer to source data
-                      unsigned char *output);      // pointer to destination data
+                      unsigned char *output);  // pointer to destination data
 
 /******************************************************************************
  *
@@ -151,9 +153,9 @@ static int gcm_update(gcm_context *ctx,  // pointer to user-provided GCM context
  *
  ******************************************************************************/
 static int gcm_finish(
-    gcm_context *ctx,  // pointer to user-provided GCM context
+    gcm_context *ctx,    // pointer to user-provided GCM context
-    unsigned char *tag,        // ptr to tag buffer - NULL if tag_len = 0
+    unsigned char *tag,  // ptr to tag buffer - NULL if tag_len = 0
-    size_t tag_len);   // length, in bytes, of the tag-receiving buf
+    size_t tag_len);     // length, in bytes, of the tag-receiving buf
 
 /******************************************************************************
  *
@@ -204,15 +206,15 @@ static int aes_tables_inited = 0;  // run-once flag for performing key
  *  decryption is typically disabled by setting AES_DECRYPTION to 0 in aes.h.
  */
 // We always need our forward tables
-static unsigned char FSb[256];     // Forward substitution box (FSb)
+static unsigned char FSb[256];  // Forward substitution box (FSb)
-static uint32_t FT0[256];  // Forward key schedule assembly tables
+static uint32_t FT0[256];       // Forward key schedule assembly tables
 static uint32_t FT1[256];
 static uint32_t FT2[256];
 static uint32_t FT3[256];
 
-#if AES_DECRYPTION         // We ONLY need reverse for decryption
+#if AES_DECRYPTION              // We ONLY need reverse for decryption
-static unsigned char RSb[256];     // Reverse substitution box (RSb)
+static unsigned char RSb[256];  // Reverse substitution box (RSb)
-static uint32_t RT0[256];  // Reverse key schedule assembly tables
+static uint32_t RT0[256];       // Reverse key schedule assembly tables
 static uint32_t RT1[256];
 static uint32_t RT2[256];
 static uint32_t RT3[256];
@@ -230,8 +232,8 @@ static uint32_t RCON[10];  // AES round constants
           ((uint32_t) (b)[(i) + 2] << 16) | ((uint32_t) (b)[(i) + 3] << 24); \
   }
 
-#define PUT_UINT32_LE(n, b, i)          \
+#define PUT_UINT32_LE(n, b, i)                  \
-  {                                     \
+  {                                             \
     (b)[(i)] = (unsigned char) ((n));           \
     (b)[(i) + 1] = (unsigned char) ((n) >> 8);  \
     (b)[(i) + 2] = (unsigned char) ((n) >> 16); \
@@ -376,7 +378,7 @@ void aes_init_keygen_tables(void) {
  ******************************************************************************/
 static int aes_set_encryption_key(aes_context *ctx, const unsigned char *key,
                                   unsigned int keysize) {
-  unsigned int i;                  // general purpose iteration local
+  unsigned int i;          // general purpose iteration local
   uint32_t *RK = ctx->rk;  // initialize our RoundKey buffer pointer
 
   for (i = 0; i < (keysize >> 2); i++) {
@@ -711,8 +713,8 @@ static const uint64_t last4[16] = {
           ((uint32_t) (b)[(i) + 2] << 8) | ((uint32_t) (b)[(i) + 3]);     \
   }
 
-#define PUT_UINT32_BE(n, b, i)          \
+#define PUT_UINT32_BE(n, b, i)                  \
-  {                                     \
+  {                                             \
     (b)[(i)] = (unsigned char) ((n) >> 24);     \
     (b)[(i) + 1] = (unsigned char) ((n) >> 16); \
     (b)[(i) + 2] = (unsigned char) ((n) >> 8);  \
@@ -745,9 +747,10 @@ int mg_gcm_initialize(void) {
  *  'x' and 'output' are seen as elements of GCM's GF(2^128) Galois field.
  *
  ******************************************************************************/
-static void gcm_mult(gcm_context *ctx,   // pointer to established context
+static void gcm_mult(
-                     const unsigned char x[16],  // pointer to 128-bit input vector
+    gcm_context *ctx,           // pointer to established context
-                     unsigned char output[16])   // pointer to 128-bit output vector
+    const unsigned char x[16],  // pointer to 128-bit input vector
+    unsigned char output[16])   // pointer to 128-bit output vector
 {
   int i;
   unsigned char lo, hi, rem;
@@ -792,10 +795,10 @@ static void gcm_mult(gcm_context *ctx,   // pointer to established context
  *
  ******************************************************************************/
 static int gcm_setkey(
-    gcm_context *ctx,    // pointer to caller-provided gcm context
+    gcm_context *ctx,            // pointer to caller-provided gcm context
     const unsigned char *key,    // pointer to the AES encryption key
     const unsigned int keysize)  // size in bytes (must be 16, 24, 32 for
-                         // 128, 192 or 256-bit keys respectively)
+                                 // 128, 192 or 256-bit keys respectively)
 {
   int ret, i, j;
   uint64_t hi, lo;
@@ -864,18 +867,19 @@ static int gcm_setkey(
  *  mode, and preprocesses the initialization vector and additional AEAD data.
  *
  ******************************************************************************/
-int gcm_start(gcm_context *ctx,  // pointer to user-provided GCM context
+int gcm_start(
-              int mode,          // GCM_ENCRYPT or GCM_DECRYPT
+    gcm_context *ctx,          // pointer to user-provided GCM context
-              const unsigned char *iv,   // pointer to initialization vector
+    int mode,                  // GCM_ENCRYPT or GCM_DECRYPT
-              size_t iv_len,     // IV length in bytes (should == 12)
+    const unsigned char *iv,   // pointer to initialization vector
-              const unsigned char *add,  // ptr to additional AEAD data (NULL if none)
+    size_t iv_len,             // IV length in bytes (should == 12)
-              size_t add_len)    // length of additional AEAD data (bytes)
+    const unsigned char *add,  // ptr to additional AEAD data (NULL if none)
+    size_t add_len)            // length of additional AEAD data (bytes)
 {
-  int ret;             // our error return if the AES encrypt fails
+  int ret;                     // our error return if the AES encrypt fails
   unsigned char work_buf[16];  // XOR source built from provided IV if len != 16
   const unsigned char *p;      // general purpose array pointer
-  size_t use_len;      // byte count to process, up to 16 bytes
+  size_t use_len;              // byte count to process, up to 16 bytes
-  size_t i;            // local loop iterator
+  size_t i;                    // local loop iterator
 
   // since the context might be reused under the same key
   // we zero the working buffers for this next new process
@@ -932,15 +936,15 @@ int gcm_start(gcm_context *ctx,  // pointer to user-provided GCM context
  *  have a partial block length of < 128 bits.)
  *
  ******************************************************************************/
-int gcm_update(gcm_context *ctx,    // pointer to user-provided GCM context
+int gcm_update(gcm_context *ctx,  // pointer to user-provided GCM context
-               size_t length,       // length, in bytes, of data to process
+               size_t length,     // length, in bytes, of data to process
                const unsigned char *input,  // pointer to source data
                unsigned char *output)       // pointer to destination data
 {
-  int ret;         // our error return if the AES encrypt fails
+  int ret;                 // our error return if the AES encrypt fails
   unsigned char ectr[16];  // counter-mode cipher output for XORing
-  size_t use_len;  // byte count to process, up to 16 bytes
+  size_t use_len;          // byte count to process, up to 16 bytes
-  size_t i;        // local loop iterator
+  size_t i;                // local loop iterator
 
   ctx->len += length;  // bump the GCM context's running length count
 
@@ -996,9 +1000,9 @@ int gcm_update(gcm_context *ctx,    // pointer to user-provided GCM context
  *  It performs the final GHASH to produce the resulting authentication TAG.
  *
  ******************************************************************************/
-int gcm_finish(gcm_context *ctx,  // pointer to user-provided GCM context
+int gcm_finish(gcm_context *ctx,    // pointer to user-provided GCM context
-               unsigned char *tag,        // pointer to buffer which receives the tag
+               unsigned char *tag,  // pointer to buffer which receives the tag
-               size_t tag_len)    // length, in bytes, of the tag-receiving buf
+               size_t tag_len)  // length, in bytes, of the tag-receiving buf
 {
   unsigned char work_buf[16];
   uint64_t orig_len = ctx->len * 8;
@@ -1040,22 +1044,22 @@ int gcm_finish(gcm_context *ctx,  // pointer to user-provided GCM context
  *
  ******************************************************************************/
 int gcm_crypt_and_tag(
-    gcm_context *ctx,    // gcm context with key already setup
+    gcm_context *ctx,            // gcm context with key already setup
-    int mode,            // cipher direction: GCM_ENCRYPT or GCM_DECRYPT
+    int mode,                    // cipher direction: GCM_ENCRYPT or GCM_DECRYPT
     const unsigned char *iv,     // pointer to the 12-byte initialization vector
-    size_t iv_len,       // byte length if the IV. should always be 12
+    size_t iv_len,               // byte length if the IV. should always be 12
     const unsigned char *add,    // pointer to the non-ciphered additional data
-    size_t add_len,      // byte length of the additional AEAD data
+    size_t add_len,              // byte length of the additional AEAD data
     const unsigned char *input,  // pointer to the cipher data source
     unsigned char *output,       // pointer to the cipher data destination
-    size_t length,       // byte length of the cipher data
+    size_t length,               // byte length of the cipher data
     unsigned char *tag,          // pointer to the tag to be generated
-    size_t tag_len)      // byte length of the tag to be generated
+    size_t tag_len)              // byte length of the tag to be generated
-{                        /*
+{                                /*
-                            assuming that the caller has already invoked gcm_setkey to
+                                    assuming that the caller has already invoked gcm_setkey to
-                            prepare the gcm context with the keying material, we simply
+                                    prepare the gcm context with the keying material, we simply
-                            invoke each of the three GCM sub-functions in turn...
+                                    invoke each of the three GCM sub-functions in turn...
-                         */
+                                 */
   gcm_start(ctx, mode, iv, iv_len, add, add_len);
   gcm_update(ctx, length, input, output);
   gcm_finish(ctx, tag, tag_len);
@@ -1105,20 +1109,28 @@ int mg_aes_gcm_encrypt(unsigned char *output,  //
 int mg_aes_gcm_decrypt(unsigned char *output, const unsigned char *input,
                        size_t input_length, const unsigned char *key,
                        const size_t key_len, const unsigned char *iv,
-                       const size_t iv_len) {
+                       const size_t iv_len, unsigned char *aead,
+                       size_t aead_len, const unsigned char *tag,
+                       const size_t tag_len) {
   int ret = 0;      // our return value
   gcm_context ctx;  // includes the AES context structure
+  unsigned char computed_tag[16];
+  size_t i;
+  int diff = 0;
 
-  size_t tag_len = 0;
+  if (tag_len > sizeof(computed_tag)) return -1;
-  unsigned char *tag_buf = NULL;
 
   gcm_setkey(&ctx, key, (unsigned int) key_len);
 
-  ret = gcm_crypt_and_tag(&ctx, MG_DECRYPT, iv, iv_len, NULL, 0, input, output,
+  ret = gcm_crypt_and_tag(&ctx, MG_DECRYPT, iv, iv_len, aead, aead_len, input,
-                          input_length, tag_buf, tag_len);
+                          output, input_length, computed_tag, tag_len);
 
   gcm_zero_ctx(&ctx);
 
+  // compare tags
+  for (i = 0; i < tag_len; i++) diff |= computed_tag[i] ^ tag[i];
+  if (diff != 0) ret = -1;
+
   return (ret);
 }
 #endif

src/tls_aes128.h

@@ -59,7 +59,9 @@ int mg_aes_gcm_encrypt(unsigned char *output, const unsigned char *input,
 int mg_aes_gcm_decrypt(unsigned char *output, const unsigned char *input,
                        size_t input_length, const unsigned char *key,
                        const size_t key_len, const unsigned char *iv,
-                       const size_t iv_len);
+                       const size_t iv_len, unsigned char *aead,
+                       size_t aead_len, const unsigned char *tag,
+                       const size_t tag_len);
 
 #endif /* TLS_AES128_H */
 

src/tls_chacha20.c

@@ -79,9 +79,11 @@ static PORTABLE_8439_DECL void poly1305_finish(poly1305_context *ctx,
 #elif defined(__LITTLE_ENDIAN__) || defined(__ARMEL__) ||                 \
     defined(__THUMBEL__) || defined(__AARCH64EL__) || defined(_MIPSEL) || \
     defined(__MIPSEL) || defined(__MIPSEL__) || defined(__XTENSA_EL__) || \
-    defined(__AVR__) || defined(LITTLE_ENDIAN)
+    defined(__AVR__)
 #define __HAVE_LITTLE_ENDIAN 1
 #endif
+// DO NOT test for LITTLE_ENDIAN, as it is defined as 1234 when including
+// sys/types.h in GCC
 
 #ifndef TEST_SLOW_PATH
 #if defined(__HAVE_LITTLE_ENDIAN)
@@ -177,7 +179,7 @@ static void core_block(const uint32_t *restrict start,
   TIMES16(__FIN)
 }
 
-#define U8(x) ((uint8_t) ((x) &0xFF))
+#define U8(x) ((uint8_t) ((x) & 0xFF))
 
 #ifdef FAST_PATH
 #define xor32_le(dst, src, pad)            \
@@ -502,7 +504,7 @@ static unsigned short U8TO16(const unsigned char *p) {
 /* store a 16 bit unsigned integer as two 8 bit unsigned integers in little
  * endian */
 static void U16TO8(unsigned char *p, unsigned short v) {
-  p[0] = (v) &0xff;
+  p[0] = (v) & 0xff;
   p[1] = (v >> 8) & 0xff;
 }
 
@@ -513,7 +515,7 @@ static void poly1305_init(poly1305_context *ctx, const unsigned char key[32]) {
 
   /* r &= 0xffffffc0ffffffc0ffffffc0fffffff */
   t0 = U8TO16(&key[0]);
-  st->r[0] = (t0) &0x1fff;
+  st->r[0] = (t0) & 0x1fff;
   t1 = U8TO16(&key[2]);
   st->r[1] = ((t0 >> 13) | (t1 << 3)) & 0x1fff;
   t2 = U8TO16(&key[4]);
@@ -553,7 +555,7 @@ static void poly1305_blocks(poly1305_state_internal_t *st,
 
     /* h += m[i] */
     t0 = U8TO16(&m[0]);
-    st->h[0] += (t0) &0x1fff;
+    st->h[0] += (t0) & 0x1fff;
     t1 = U8TO16(&m[2]);
     st->h[1] += ((t0 >> 13) | (t1 << 3)) & 0x1fff;
     t2 = U8TO16(&m[4]);
@@ -715,7 +717,7 @@ static unsigned long U8TO32(const unsigned char *p) {
 /* store a 32 bit unsigned integer as four 8 bit unsigned integers in little
  * endian */
 static void U32TO8(unsigned char *p, unsigned long v) {
-  p[0] = (unsigned char) ((v) &0xff);
+  p[0] = (unsigned char) ((v) & 0xff);
   p[1] = (unsigned char) ((v >> 8) & 0xff);
   p[2] = (unsigned char) ((v >> 16) & 0xff);
   p[3] = (unsigned char) ((v >> 24) & 0xff);
@@ -979,8 +981,8 @@ typedef unsigned uint128_t __attribute__((mode(TI)));
 #define MUL128(out, x, y) out = ((uint128_t) x * y)
 #define ADD(out, in) out += in
 #define ADDLO(out, in) out += in
-#define SHR(in, shift) (uint64_t)(in >> (shift))
+#define SHR(in, shift) (uint64_t) (in >> (shift))
-#define LO(in) (uint64_t)(in)
+#define LO(in) (uint64_t) (in)
 
 #define POLY1305_NOINLINE __attribute__((noinline))
 #endif
@@ -1009,7 +1011,7 @@ static uint64_t U8TO64(const unsigned char *p) {
 /* store a 64 bit unsigned integer as eight 8 bit unsigned integers in little
  * endian */
 static void U64TO8(unsigned char *p, uint64_t v) {
-  p[0] = (unsigned char) ((v) &0xff);
+  p[0] = (unsigned char) ((v) & 0xff);
   p[1] = (unsigned char) ((v >> 8) & 0xff);
   p[2] = (unsigned char) ((v >> 16) & 0xff);
   p[3] = (unsigned char) ((v >> 24) & 0xff);
@@ -1027,7 +1029,7 @@ static void poly1305_init(poly1305_context *ctx, const unsigned char key[32]) {
   t0 = U8TO64(&key[0]);
   t1 = U8TO64(&key[8]);
 
-  st->r[0] = (t0) &0xffc0fffffff;
+  st->r[0] = (t0) & 0xffc0fffffff;
   st->r[1] = ((t0 >> 44) | (t1 << 20)) & 0xfffffc0ffff;
   st->r[2] = ((t1 >> 24)) & 0x00ffffffc0f;
 
@@ -1071,7 +1073,7 @@ static void poly1305_blocks(poly1305_state_internal_t *st,
     t0 = U8TO64(&m[0]);
     t1 = U8TO64(&m[8]);
 
-    h0 += ((t0) &0xfffffffffff);
+    h0 += ((t0) & 0xfffffffffff);
     h1 += (((t0 >> 44) | (t1 << 20)) & 0xfffffffffff);
     h2 += (((t1 >> 24)) & 0x3ffffffffff) | hibit;
 
@@ -1178,7 +1180,7 @@ static POLY1305_NOINLINE void poly1305_finish(poly1305_context *ctx,
   t0 = st->pad[0];
   t1 = st->pad[1];
 
-  h0 += ((t0) &0xfffffffffff);
+  h0 += ((t0) & 0xfffffffffff);
   c = (h0 >> 44);
   h0 &= 0xfffffffffff;
   h1 += (((t0 >> 44) | (t1 << 20)) & 0xfffffffffff) + c;
@@ -1255,7 +1257,7 @@ static PORTABLE_8439_DECL void pad_if_needed(poly1305_context *ctx,
   }
 }
 
-#define __u8(v) ((uint8_t) ((v) &0xFF))
+#define __u8(v) ((uint8_t) ((v) & 0xFF))
 
 // TODO: make this depending on the unaligned/native read size possible
 static PORTABLE_8439_DECL void write_64bit_int(poly1305_context *ctx,
@@ -1328,14 +1330,26 @@ PORTABLE_8439_DECL size_t mg_chacha20_poly1305_encrypt(
 
 PORTABLE_8439_DECL size_t mg_chacha20_poly1305_decrypt(
     uint8_t *restrict plain_text, const uint8_t key[RFC_8439_KEY_SIZE],
-    const uint8_t nonce[RFC_8439_NONCE_SIZE],
+    const uint8_t nonce[RFC_8439_NONCE_SIZE], const uint8_t *restrict ad,
-    const uint8_t *restrict cipher_text, size_t cipher_text_size) {
+    size_t ad_size, const uint8_t *restrict cipher_text,
+    size_t cipher_text_size) {
   // first we calculate the mac and see if it lines up, only then do we decrypt
   size_t actual_size = cipher_text_size - RFC_8439_TAG_SIZE;
+  uint8_t computed_mac[RFC_8439_TAG_SIZE];
+  int diff = 0;
+  size_t i;
   if (MG_OVERLAPPING(plain_text, actual_size, cipher_text, cipher_text_size)) {
     return (size_t) -1;
   }
 
+  poly1305_calculate_mac(computed_mac, cipher_text, actual_size, key, nonce, ad,
+                         ad_size);
+
+  // compare tags
+  for (i = 0; i < RFC_8439_TAG_SIZE; i++)
+    diff |= computed_mac[i] ^ cipher_text[actual_size + i];
+  if (diff != 0) return (size_t) -1;
+
   chacha20_xor_stream(plain_text, cipher_text, actual_size, key, nonce, 1);
   return actual_size;
 }

src/tls_chacha20.h

@@ -105,6 +105,7 @@ PORTABLE_8439_DECL size_t mg_chacha20_poly1305_encrypt(
 PORTABLE_8439_DECL size_t mg_chacha20_poly1305_decrypt(
     uint8_t *restrict plain_text, const uint8_t key[RFC_8439_KEY_SIZE],
     const uint8_t nonce[RFC_8439_NONCE_SIZE],
+    const uint8_t *restrict ad, size_t ad_size,
     const uint8_t *restrict cipher_text, size_t cipher_text_size);
 #if defined(__cplusplus)
 }

src/tls_mbed.c

@@ -6,7 +6,8 @@
 
 #if MG_TLS == MG_TLS_MBED
 
-#if defined(MBEDTLS_VERSION_NUMBER) && MBEDTLS_VERSION_NUMBER >= 0x03000000
+#if defined(MBEDTLS_VERSION_NUMBER) && MBEDTLS_VERSION_NUMBER >= 0x03000000 && \
+    MBEDTLS_VERSION_NUMBER < 0x04000000
 #define MG_MBEDTLS_RNG_GET , mg_mbed_rng, NULL
 #else
 #define MG_MBEDTLS_RNG_GET
@@ -19,16 +20,19 @@ static int mg_tls_err(struct mg_connection *c, int rc) {
   return rc;
 }
 
+#if defined(MBEDTLS_VERSION_NUMBER) && MBEDTLS_VERSION_NUMBER >= 0x04000000
+#else
 static int mg_mbed_rng(void *ctx, unsigned char *buf, size_t len) {
   mg_random(buf, len);
   (void) ctx;
   return 0;
 }
+#endif
 
 static bool mg_load_cert(struct mg_str str, mbedtls_x509_crt *p) {
   int rc;
   if (str.buf == NULL || str.buf[0] == '\0' || str.buf[0] == '*') return true;
-  if (str.buf[0] == '-') str.len++;  // PEM, include trailing NUL
+  if (!MG_IS_DER(str.buf)) str.len++;  // PEM, include trailing NUL
   if ((rc = mbedtls_x509_crt_parse(p, (uint8_t *) str.buf, str.len)) != 0) {
     MG_ERROR(("cert err %#x", -rc));
     return false;
@@ -39,7 +43,7 @@ static bool mg_load_cert(struct mg_str str, mbedtls_x509_crt *p) {
 static bool mg_load_key(struct mg_str str, mbedtls_pk_context *p) {
   int rc;
   if (str.buf == NULL || str.buf[0] == '\0' || str.buf[0] == '*') return true;
-  if (str.buf[0] == '-') str.len++;  // PEM, include trailing NUL
+  if (!MG_IS_DER(str.buf)) str.len++;  // PEM, include trailing NUL
   if ((rc = mbedtls_pk_parse_key(p, (uint8_t *) str.buf, str.len, NULL,
                                  0 MG_MBEDTLS_RNG_GET)) != 0) {
     MG_ERROR(("key err %#x", -rc));
@@ -59,6 +63,9 @@ void mg_tls_free(struct mg_connection *c) {
 #ifdef MBEDTLS_SSL_SESSION_TICKETS
     mbedtls_ssl_ticket_free(&tls->ticket);
 #endif
+    // PSA has global data. Do not call mbedtls_psa_crypto_free() here,
+    // it will free all global resources. Call it when actually freeing all
+    // application resources (main() exits)
     mg_free(tls);
     c->tls = NULL;
   }
@@ -118,6 +125,7 @@ void mg_tls_init(struct mg_connection *c, const struct mg_tls_opts *opts) {
 #if defined(MBEDTLS_VERSION_NUMBER) && MBEDTLS_VERSION_NUMBER >= 0x03000000 && \
     defined(MBEDTLS_PSA_CRYPTO_C)
   psa_crypto_init();  // https://github.com/Mbed-TLS/mbedtls/issues/9072#issuecomment-2084845711
+  // this initializes global resources and then just returns when called again
 #endif
   mbedtls_ssl_init(&tls->ssl);
   mbedtls_ssl_config_init(&tls->conf);
@@ -135,7 +143,11 @@ void mg_tls_init(struct mg_connection *c, const struct mg_tls_opts *opts) {
     mg_error(c, "tls defaults %#x", -mg_tls_err(c, rc));
     goto fail;
   }
+#if defined(MBEDTLS_VERSION_NUMBER) && MBEDTLS_VERSION_NUMBER >= 0x04000000
+  MG_INFO(("PSA is in control of random number generation"));
+#else
   mbedtls_ssl_conf_rng(&tls->conf, mg_mbed_rng, c);
+#endif
 
   if (opts->ca.len == 0 || mg_strcmp(opts->ca, mg_str("*")) == 0) {
     // NOTE: MBEDTLS_SSL_VERIFY_NONE is not supported for TLS1.3 on client side
@@ -144,11 +156,16 @@ void mg_tls_init(struct mg_connection *c, const struct mg_tls_opts *opts) {
   } else {
     if (mg_load_cert(opts->ca, &tls->ca) == false) goto fail;
     mbedtls_ssl_conf_ca_chain(&tls->conf, &tls->ca, NULL);
-    if (c->is_client && opts->name.buf != NULL && opts->name.buf[0] != '\0') {
+    if (c->is_client) {
-      char *host = mg_mprintf("%.*s", opts->name.len, opts->name.buf);
+      if (opts->name.buf != NULL && opts->name.buf[0] != '\0') {
-      mbedtls_ssl_set_hostname(&tls->ssl, host);
+        char *host = mg_mprintf("%.*s", opts->name.len, opts->name.buf);
-      MG_DEBUG(("%lu hostname verification: %s", c->id, host));
+        mbedtls_ssl_set_hostname(&tls->ssl, host);
-      mg_free(host);
+        MG_DEBUG(("%lu hostname verification: %s", c->id, host));
+        mg_free(host);
+      } else {
+        MG_DEBUG(("%lu skipping hostname verification", c->id));
+        mbedtls_ssl_set_hostname(&tls->ssl, NULL);
+      }
     }
     mbedtls_ssl_conf_authmode(&tls->conf, MBEDTLS_SSL_VERIFY_REQUIRED);
   }
@@ -187,7 +204,7 @@ size_t mg_tls_pending(struct mg_connection *c) {
 long mg_tls_recv(struct mg_connection *c, void *buf, size_t len) {
   struct mg_tls *tls = (struct mg_tls *) c->tls;
   long n = mbedtls_ssl_read(&tls->ssl, (unsigned char *) buf, len);
-  if (!c->is_tls_hs && buf == NULL && n == 0) return 0; // TODO(): MIP
+  if (!c->is_tls_hs && buf == NULL && n == 0) return 0;  // TODO(): MIP
   if (n == MBEDTLS_ERR_SSL_WANT_READ || n == MBEDTLS_ERR_SSL_WANT_WRITE)
     return MG_IO_WAIT;
 #if defined(MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET)
@@ -211,10 +228,11 @@ long mg_tls_send(struct mg_connection *c, const void *buf, size_t len) {
       (n == MBEDTLS_ERR_SSL_WANT_READ || n == MBEDTLS_ERR_SSL_WANT_WRITE);
   if (was_throttled) return MG_IO_WAIT;  // flushed throttled data instead
   if (c->is_tls_throttled) {
-    tls->throttled_buf = (unsigned char *)buf; // MbedTLS code actually ignores
+    tls->throttled_buf =
-    tls->throttled_len = len; //  these, but let's play API rules
+        (unsigned char *) buf;  // MbedTLS code actually ignores
-    return (long) len;  // already encripted that when throttled
+    tls->throttled_len = len;   //  these, but let's play API rules
-  } // if last chunk fails to be sent, it needs to be flushed
+    return (long) len;          // already encripted that when throttled
+  }  // if last chunk fails to be sent, it needs to be flushed
   if (n <= 0) return MG_IO_ERR;
   return n;
 }
@@ -222,8 +240,10 @@ long mg_tls_send(struct mg_connection *c, const void *buf, size_t len) {
 void mg_tls_flush(struct mg_connection *c) {
   struct mg_tls *tls = (struct mg_tls *) c->tls;
   if (c->is_tls_throttled) {
-    long n = mbedtls_ssl_write(&tls->ssl, tls->throttled_buf, tls->throttled_len);
+    long n =
-    c->is_tls_throttled = (n == MBEDTLS_ERR_SSL_WANT_READ || n == MBEDTLS_ERR_SSL_WANT_WRITE);
+        mbedtls_ssl_write(&tls->ssl, tls->throttled_buf, tls->throttled_len);
+    c->is_tls_throttled =
+        (n == MBEDTLS_ERR_SSL_WANT_READ || n == MBEDTLS_ERR_SSL_WANT_WRITE);
   }
 }
 
@@ -235,9 +255,14 @@ void mg_tls_ctx_init(struct mg_mgr *mgr) {
 #ifdef MBEDTLS_SSL_SESSION_TICKETS
     int rc;
     mbedtls_ssl_ticket_init(&ctx->tickets);
+#if defined(MBEDTLS_VERSION_NUMBER) && MBEDTLS_VERSION_NUMBER >= 0x04000000
+    if ((rc = mbedtls_ssl_ticket_setup(&ctx->tickets, PSA_ALG_GCM,
+                                       PSA_KEY_TYPE_AES, 128, 86400))
+#else
     if ((rc = mbedtls_ssl_ticket_setup(&ctx->tickets, mg_mbed_rng, NULL,
-                                       MBEDTLS_CIPHER_AES_128_GCM, 86400)) !=
+                                       MBEDTLS_CIPHER_AES_128_GCM, 86400))
-        0) {
+#endif
+        != 0) {
       MG_ERROR((" mbedtls_ssl_ticket_setup %#x", -rc));
     }
 #endif

src/tls_openssl.c

@@ -28,6 +28,7 @@ static int mg_tls_err(struct mg_connection *c, struct mg_tls *tls, int res) {
   return err;
 }
 
+#if MG_TLS != MG_TLS_WOLFSSL
 static STACK_OF(X509_INFO) * load_ca_certs(struct mg_str ca) {
   BIO *bio = BIO_new_mem_buf(ca.buf, (int) ca.len);
   STACK_OF(X509_INFO) *certs =
@@ -39,6 +40,7 @@ static STACK_OF(X509_INFO) * load_ca_certs(struct mg_str ca) {
 static bool add_ca_certs(SSL_CTX *ctx, STACK_OF(X509_INFO) * certs) {
   int i;
   X509_STORE *cert_store = SSL_CTX_get_cert_store(ctx);
+  if (cert_store == NULL) return false;
   for (i = 0; i < sk_X509_INFO_num(certs); i++) {
     X509_INFO *cert_info = sk_X509_INFO_value(certs, i);
     if (cert_info->x509 && !X509_STORE_add_cert(cert_store, cert_info->x509))
@@ -46,6 +48,7 @@ static bool add_ca_certs(SSL_CTX *ctx, STACK_OF(X509_INFO) * certs) {
   }
   return true;
 }
+#endif
 
 static EVP_PKEY *load_key(struct mg_str s) {
   BIO *bio = BIO_new_mem_buf(s.buf, (int) (long) s.len);
@@ -57,9 +60,9 @@ static EVP_PKEY *load_key(struct mg_str s) {
 static X509 *load_cert(struct mg_str s) {
   BIO *bio = BIO_new_mem_buf(s.buf, (int) (long) s.len);
   X509 *cert = bio == NULL ? NULL
-               : s.buf[0] == '-'
+               : MG_IS_DER(s.buf)
-                   ? PEM_read_bio_X509(bio, NULL, NULL, NULL)  // PEM
+                   ? d2i_X509_bio(bio, NULL)                    // DER
-                   : d2i_X509_bio(bio, NULL);                  // DER
+                   : PEM_read_bio_X509(bio, NULL, NULL, NULL);  // PEM
   if (bio) BIO_free(bio);
   return cert;
 }
@@ -170,9 +173,21 @@ void mg_tls_init(struct mg_connection *c, const struct mg_tls_opts *opts) {
     SSL_set_verify(tls->ssl, SSL_VERIFY_NONE, NULL);
   }
 #endif
+
   if (opts->ca.buf != NULL && opts->ca.buf[0] != '\0') {
     SSL_set_verify(tls->ssl, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
                    NULL);
+#if MG_TLS == MG_TLS_WOLFSSL
+    extern int wolfSSL_CTX_load_verify_buffer(SSL_CTX *, const unsigned char *,
+                                              long, int);
+    rc = wolfSSL_CTX_load_verify_buffer(tls->ctx,
+                                        (const unsigned char *) opts->ca.buf,
+                                        (long) opts->ca.len, SSL_FILETYPE_PEM);
+    if (rc != 1) {
+      mg_error(c, "CA err");
+      goto fail;
+    }
+#else
     STACK_OF(X509_INFO) *certs = load_ca_certs(opts->ca);
     rc = add_ca_certs(tls->ctx, certs);
     sk_X509_INFO_pop_free(certs, X509_INFO_free);
@@ -180,7 +195,9 @@ void mg_tls_init(struct mg_connection *c, const struct mg_tls_opts *opts) {
       mg_error(c, "CA err");
       goto fail;
     }
+#endif
   }
+
   if (opts->cert.buf != NULL && opts->cert.buf[0] != '\0') {
     X509 *cert = load_cert(opts->cert);
     rc = cert == NULL ? 0 : SSL_use_certificate(tls->ssl, cert);
@@ -258,7 +275,7 @@ size_t mg_tls_pending(struct mg_connection *c) {
 long mg_tls_recv(struct mg_connection *c, void *buf, size_t len) {
   struct mg_tls *tls = (struct mg_tls *) c->tls;
   int n = SSL_read(tls->ssl, buf, (int) len);
-  if (!c->is_tls_hs && buf == NULL && n == 0) return 0; // TODO(): MIP
+  if (!c->is_tls_hs && buf == NULL && n == 0) return 0;  // TODO(): MIP
   if (n < 0 && mg_tls_err(c, tls, n) == 0) return MG_IO_WAIT;
   if (n <= 0) return MG_IO_ERR;
   return n;

src/tls_rsa.c

@@ -1520,7 +1520,6 @@ NS_INTERNAL bigint *bi_mod_power(BI_CTX *ctx, bigint *bi, bigint *biexp) {
 #endif
 }
 
-#if 0
 /**
  * @brief Use the Chinese Remainder Theorem to quickly perform RSA decrypts.
  *
@@ -1533,6 +1532,7 @@ NS_INTERNAL bigint *bi_mod_power(BI_CTX *ctx, bigint *bi, bigint *biexp) {
  * @param qInv [in] CRT's qInv bigint
  * @return The result of the CRT operation
  */
+#if 1
 NS_INTERNAL bigint *bi_crt(BI_CTX *ctx, bigint *bi, bigint *dP, bigint *dQ,
                            bigint *p, bigint *q, bigint *qInv) {
   bigint *m1, *m2, *h;
@@ -1559,7 +1559,6 @@ NS_INTERNAL bigint *bi_crt(BI_CTX *ctx, bigint *bi, bigint *dP, bigint *dQ,
 }
 #endif
 
-
 // Proper lib usage:
 // - BI_CTX *c = bi_initialize()
 // - allocate bigints (e.g.: calling bi_import(), int_to_bi(), ...)
@@ -1588,4 +1587,48 @@ int mg_rsa_mod_pow(const uint8_t *mod, size_t modsz, const uint8_t *exp, size_t
 	return 0;
 }
 
+int mg_rsa_crt_sign(const uint8_t *em, size_t em_len,
+                    const uint8_t *dP, size_t dP_len,
+                    const uint8_t *dQ, size_t dQ_len,
+                    const uint8_t *p, size_t p_len,
+                    const uint8_t *q, size_t q_len,
+                    const uint8_t *qInv, size_t qInv_len,
+                    uint8_t *signature, size_t sig_len) {
+  BI_CTX *ctx;
+  bigint *em_bi, *dP_bi, *dQ_bi, *p_bi, *q_bi, *qInv_bi, *result_bi;
+  int ret = -1;
+
+  ctx = bi_initialize();
+  if (ctx == NULL) {
+    return -1;
+  }
+
+  em_bi = bi_import(ctx, em, (int) em_len);
+  dP_bi = bi_import(ctx, dP, (int) dP_len);
+  dQ_bi = bi_import(ctx, dQ, (int) dQ_len);
+  p_bi = bi_import(ctx, p, (int) p_len);
+  q_bi = bi_import(ctx, q, (int) q_len);
+  qInv_bi = bi_import(ctx, qInv, (int) qInv_len);
+
+  if (em_bi == NULL || dP_bi == NULL || dQ_bi == NULL ||
+      p_bi == NULL || q_bi == NULL || qInv_bi == NULL) {
+    goto cleanup;
+  }
+
+  bi_set_mod(ctx, bi_clone(ctx, p_bi), BIGINT_P_OFFSET);
+  bi_set_mod(ctx, bi_clone(ctx, q_bi), BIGINT_Q_OFFSET);
+
+  result_bi = bi_crt(ctx, em_bi, dP_bi, dQ_bi, p_bi, q_bi, qInv_bi);
+  if (result_bi == NULL) {
+    goto cleanup;
+  }
+  bi_export(ctx, result_bi, signature, (int) sig_len);
+  ret = 0;  // Success!
+cleanup:
+  bi_free_mod(ctx, BIGINT_P_OFFSET);  // cloned p_bi stored in mod context
+  bi_free_mod(ctx, BIGINT_Q_OFFSET);  // cloned q_bi stored in mod context
+  bi_terminate(ctx);
+  return ret;
+}
+
 #endif /* MG_TLS == MG_TLS_BUILTIN */

src/tls_rsa.h

@@ -3,5 +3,11 @@
 
 #include "arch.h"
 int mg_rsa_mod_pow(const uint8_t *mod, size_t modsz, const uint8_t *exp, size_t expsz, const uint8_t *msg, size_t msgsz, uint8_t *out, size_t outsz);
-
+int mg_rsa_crt_sign(const uint8_t *em, size_t em_len,
+                    const uint8_t *dP, size_t dP_len,
+                    const uint8_t *dQ, size_t dQ_len,
+                    const uint8_t *p, size_t p_len,
+                    const uint8_t *q, size_t q_len,
+                    const uint8_t *qInv, size_t qInv_len,
+                    uint8_t *signature, size_t sig_len);
 #endif // TLS_RSA_H

src/util.c

@@ -27,6 +27,15 @@ bool mg_random(void *buf, size_t len) {
 #elif MG_ARCH == MG_ARCH_PICOSDK
   while (len--) *p++ = (unsigned char) (get_rand_32() & 255);
   success = true;
+#elif MG_ARCH == MG_ARCH_ZEPHYR
+#if MG_TLS == MG_TLS_BUILTIN ||                                    \
+    (MG_TLS == MG_TLS_MBED && (!defined(MBEDTLS_VERSION_NUMBER) || \
+                               MBEDTLS_VERSION_NUMBER < 0x04000000))
+  return (sys_csrand_get(buf, len) == 0);  // do not fallback on reseed error
+#else
+  sys_rand_get(buf, len);
+  success = true;
+#endif
 #elif MG_ARCH == MG_ARCH_WIN32
 #if defined(_MSC_VER) && _MSC_VER < 1700
   static bool initialised = false;
@@ -120,7 +129,7 @@ int mg_check_ip_acl(struct mg_str acl, struct mg_addr *remote_ip) {
   if (remote_ip->is_ip6) {
     return -1;  // TODO(): handle IPv6 ACL and addresses
   } else {      // IPv4
-    memcpy((void *) &remote_ip4, remote_ip->ip, sizeof(remote_ip4));
+    memcpy((void *) &remote_ip4, remote_ip->addr.ip, sizeof(remote_ip4));
     while (mg_span(acl, &entry, &acl, ',')) {
       uint32_t net, mask;
       if (entry.buf[0] != '+' && entry.buf[0] != '-') return -1;
@@ -134,7 +143,7 @@ int mg_check_ip_acl(struct mg_str acl, struct mg_addr *remote_ip) {
 bool mg_path_is_sane(const struct mg_str path) {
   const char *s = path.buf;
   size_t n = path.len;
-  if (path.buf[0] == '~') return false;  // Starts with ~
+  if (path.buf[0] == '~') return false;                        // Starts with ~
   if (path.buf[0] == '.' && path.buf[1] == '.') return false;  // Starts with ..
   for (; s[0] != '\0' && n > 0; s++, n--) {
     if ((s[0] == '/' || s[0] == '\\') && n >= 2) {   // Subdir?
@@ -204,12 +213,15 @@ uint32_t mg_ntohl(uint32_t net) {
   return MG_LOAD_BE32(&net);
 }
 
+uint64_t mg_ntohll(uint64_t net) {
+  return MG_LOAD_BE64(&net);
+}
+
 void mg_delayms(unsigned int ms) {
   uint64_t to = mg_millis() + ms + 1;
   while (mg_millis() < to) (void) 0;
 }
 
-
 #if MG_ENABLE_CUSTOM_CALLOC
 #else
 void *mg_calloc(size_t count, size_t size) {

src/util.h

@@ -27,6 +27,16 @@ void mg_delayms(unsigned int ms);
 
 #define MG_IPV4(a, b, c, d) mg_htonl(MG_U32(a, b, c, d))
 
+#define MG_IPV6(a, b, c, d, e, f, g ,h) \
+  { (uint8_t)((a)>>8),(uint8_t)(a), \
+    (uint8_t)((b)>>8),(uint8_t)(b), \
+    (uint8_t)((c)>>8),(uint8_t)(c), \
+    (uint8_t)((d)>>8),(uint8_t)(d), \
+    (uint8_t)((e)>>8),(uint8_t)(e), \
+    (uint8_t)((f)>>8),(uint8_t)(f), \
+    (uint8_t)((g)>>8),(uint8_t)(g), \
+    (uint8_t)((h)>>8),(uint8_t)(h) }
+
 // For printing IPv4 addresses: printf("%d.%d.%d.%d\n", MG_IPADDR_PARTS(&ip))
 #define MG_U8P(ADDR) ((uint8_t *) (ADDR))
 #define MG_IPADDR_PARTS(ADDR) \
@@ -41,6 +51,14 @@ void mg_delayms(unsigned int ms);
   ((uint32_t) (((uint32_t) MG_U8P(p)[0] << 24U) | \
                ((uint32_t) MG_U8P(p)[1] << 16U) | \
                ((uint32_t) MG_U8P(p)[2] << 8U) | MG_U8P(p)[3]))
+#define MG_LOAD_BE64(p)                           \
+  ((uint64_t) (((uint64_t) MG_U8P(p)[0] << 56U) | \
+               ((uint64_t) MG_U8P(p)[1] << 48U) | \
+               ((uint64_t) MG_U8P(p)[2] << 40U) | \
+               ((uint64_t) MG_U8P(p)[3] << 32U) | \
+               ((uint64_t) MG_U8P(p)[4] << 24U) | \
+               ((uint64_t) MG_U8P(p)[5] << 16U) | \
+               ((uint64_t) MG_U8P(p)[6] << 8U) | MG_U8P(p)[7]))
 #define MG_STORE_BE16(p, n)           \
   do {                                \
     MG_U8P(p)[0] = ((n) >> 8U) & 255; \
@@ -59,11 +77,24 @@ void mg_delayms(unsigned int ms);
     MG_U8P(p)[2] = ((n) >> 8U) & 255;  \
     MG_U8P(p)[3] = (n) &255;           \
   } while (0)
+#define MG_STORE_BE64(p, n)            \
+  do {                                 \
+    MG_U8P(p)[0] = ((n) >> 56U) & 255; \
+    MG_U8P(p)[1] = ((n) >> 48U) & 255; \
+    MG_U8P(p)[2] = ((n) >> 40U) & 255; \
+    MG_U8P(p)[3] = ((n) >> 32U) & 255; \
+    MG_U8P(p)[4] = ((n) >> 24U) & 255; \
+    MG_U8P(p)[5] = ((n) >> 16U) & 255; \
+    MG_U8P(p)[6] = ((n) >> 8U) & 255;  \
+    MG_U8P(p)[7] = (n) &255;           \
+  } while (0)
 
 uint16_t mg_ntohs(uint16_t net);
 uint32_t mg_ntohl(uint32_t net);
+uint64_t mg_ntohll(uint64_t net);
 #define mg_htons(x) mg_ntohs(x)
 #define mg_htonl(x) mg_ntohl(x)
+#define mg_htonll(x) mg_ntohll(x)
 
 #define MG_REG(x) ((volatile uint32_t *) (x))[0]
 #define MG_BIT(x) (((uint32_t) 1U) << (x))

src/version.h

@@ -1 +1 @@
-#define MG_VERSION "7.19"
+#define MG_VERSION "7.21"

src/wifi.h

@@ -4,26 +4,40 @@
 #include "log.h"
 #include "str.h"
 
-struct mg_wifi_scan_bss_data {
+struct mg_wifi_data {
-    struct mg_str SSID;
+  char *ssid, *pass;      // STA mode, SSID to connect to
-    char *BSSID;
+  char *apssid, *appass;  // AP mode, our SSID
-    int16_t RSSI;
+  uint32_t apip, apmask;  // AP mode, our IP address and mask
-    uint8_t security;
+  uint8_t security;       // STA mode, TBD
-#define MG_WIFI_SECURITY_OPEN 0
+  uint8_t apsecurity;     // AP mode, TBD
-#define MG_WIFI_SECURITY_WEP  MG_BIT(0)
+  uint8_t apchannel;      // AP mode, channel to use
-#define MG_WIFI_SECURITY_WPA  MG_BIT(1)
+  bool apmode;  // start in AP mode; 'false' -> connect to 'ssid' != NULL
-#define MG_WIFI_SECURITY_WPA2 MG_BIT(2)
-#define MG_WIFI_SECURITY_WPA3 MG_BIT(3)
-    uint8_t channel;
-    unsigned band :2;
-#define MG_WIFI_BAND_2G 0
-#define MG_WIFI_BAND_5G 1
-    unsigned has_n :1;
 };
 
+struct mg_wifi_scan_bss_data {
+  struct mg_str SSID;
+  char *BSSID;
+  int16_t RSSI;
+  uint8_t security;
+#define MG_WIFI_SECURITY_OPEN 0
+#define MG_WIFI_SECURITY_WEP MG_BIT(0)
+#define MG_WIFI_SECURITY_WPA MG_BIT(1)
+#define MG_WIFI_SECURITY_WPA2 MG_BIT(2)
+#define MG_WIFI_SECURITY_WPA3 MG_BIT(3)
+#define MG_WIFI_SECURITY_WPA_ENTERPRISE MG_BIT(4)
+#define MG_WIFI_SECURITY_WPA2_ENTERPRISE MG_BIT(5)
+#define MG_WIFI_SECURITY_WPA3_ENTERPRISE MG_BIT(6)
+  uint8_t channel;
+  unsigned band : 2;
+#define MG_WIFI_BAND_2G 0
+#define MG_WIFI_BAND_5G 1
+  unsigned has_n : 1;
+  unsigned has_ac : 1;
+  unsigned has_ax : 1;
+};
 
 bool mg_wifi_scan(void);
-bool mg_wifi_connect(char *ssid, char *pass);
+bool mg_wifi_connect(struct mg_wifi_data *);
 bool mg_wifi_disconnect(void);
-bool mg_wifi_ap_start(char *ssid, char *pass, unsigned int channel);
+bool mg_wifi_ap_start(struct mg_wifi_data *);
 bool mg_wifi_ap_stop(void);

src/wifi_dummy.c

@@ -2,7 +2,9 @@
 
 #if (!defined(MG_ENABLE_DRIVER_PICO_W) || !MG_ENABLE_DRIVER_PICO_W) && \
     (!defined(MG_ENABLE_DRIVER_CYW) || !MG_ENABLE_DRIVER_CYW) && \
-    (!defined(MG_ENABLE_DRIVER_CYW_SDIO) || !MG_ENABLE_DRIVER_CYW_SDIO)
+    (!defined(MG_ENABLE_DRIVER_CYW_SDIO) || !MG_ENABLE_DRIVER_CYW_SDIO) && \
+    (!defined(MG_ENABLE_DRIVER_NXP_WIFI) || !MG_ENABLE_DRIVER_NXP_WIFI) && \
+    (!defined(MG_ENABLE_DRIVER_ST67W6) || !MG_ENABLE_DRIVER_ST67W6)
 
 
 bool mg_wifi_scan(void) {
@@ -10,9 +12,8 @@ bool mg_wifi_scan(void) {
   return false;
 }
 
-bool mg_wifi_connect(char *ssid, char *pass) {
+bool mg_wifi_connect(struct mg_wifi_data *wifi) {
-  (void) ssid;
+  (void) wifi;
-  (void) pass;
   return mg_wifi_scan();
 }
 
@@ -20,10 +21,8 @@ bool mg_wifi_disconnect(void) {
   return mg_wifi_scan();
 }
 
-bool mg_wifi_ap_start(char *ssid, char *pass, unsigned int channel) {
+bool mg_wifi_ap_start(struct mg_wifi_data *wifi) {
-  (void) ssid;
+  (void) wifi;
-  (void) pass;
-  (void) channel;
   return mg_wifi_scan();
 }
 

src/ws.c

@@ -55,7 +55,7 @@ static void ws_handshake(struct mg_connection *c, const struct mg_str *wskey,
     mg_printf(c, "Sec-WebSocket-Protocol: %.*s\r\n", (int) wsproto->len,
               wsproto->buf);
   }
-  mg_send(c, "\r\n", 2);
+  if (!mg_send(c, "\r\n", 2)) mg_error(c, "OOM");
 }
 
 static uint32_t be32(const uint8_t *p) {
@@ -173,9 +173,13 @@ static void mg_ws_cb(struct mg_connection *c, int ev, void *ev_data) {
 
     while (ws_process(c->recv.buf + ofs, c->recv.len - ofs, &msg) > 0) {
       char *s = (char *) c->recv.buf + ofs + msg.header_len;
-      struct mg_ws_message m = {{s, msg.data_len}, msg.flags};
+      struct mg_ws_message m;
-      size_t len = msg.header_len + msg.data_len;
+      size_t len;
-      uint8_t final = msg.flags & 128, op = msg.flags & 15;
+      uint8_t final, op;
+      m.data.buf = s, m.data.len = msg.data_len, m.flags = msg.flags;
+      len = msg.header_len + msg.data_len;
+      final = msg.flags & 128;
+      op = msg.flags & 15;
       // MG_VERBOSE ("fin %d op %d len %d [%.*s]", final, op,
       //                       (int) m.data.len, (int) m.data.len, m.data.buf));
       switch (op) {
@@ -292,6 +296,6 @@ size_t mg_ws_wrap(struct mg_connection *c, size_t len, int op) {
     memmove(p, p - header_len, len);             // Shift data
     memcpy(p - header_len, header, header_len);  // Prepend header
     mg_ws_mask(c, len);                          // Mask data
-  }
+  }  // returning 0 means an OOM condition (iobuf couldn't resize), yet this is
-  return c->send.len;
+  return c->send.len;  // so far recoverable, let the caller decide
 }

test/Makefile

@@ -91,9 +91,18 @@ mip_tap_test: mip_tap_test.c mongoose.c mongoose.h packed_fs.c Makefile tls_mult
 	$(CC) mip_tap_test.c packed_fs.c $(CFLAGS) $(LDFLAGS) -o $@
 	ASAN_OPTIONS=$(ASAN_OPTIONS) $(RUN) ./$@
 
+# bridge UDP port <--> TAP interface
+port_tap_bridge: port_tap_bridge.c
+	cc port_tap_bridge.c -o $@
+
+# requires port_tap_bridge to be running
+mip_port_test: mip_port_test.c mongoose.c mongoose.h packed_fs.c Makefile tls_multirec/server
+	$(CC) mip_port_test.c packed_fs.c $(CFLAGS) $(LDFLAGS) -o $@
+	ASAN_OPTIONS=$(ASAN_OPTIONS) $(RUN) ./$@
+
 mip_vc98: mip_test.c mongoose.c mongoose.h packed_fs.c Makefile
 	$(DOCKER) mdashnet/vc98 wine cl mip_test.c packed_fs.c $(VCFLAGS) $(DEFS) $(TFLAGS) /Fe$@.exe
-	$(DOCKER) mdashnet/vc98 wine $@.exe
+	$(DOCKER) -e WINEPREFIX=/tmp/wineprefix mdashnet/vc98 wine $@.exe
 
 packed_fs.c: Makefile data/ssi.h fuzz.c data/a.txt data/ca.pem certs/ca.crt certs/server.crt certs/server.key
 	$(CC) $(CFLAGS) pack.c -o pack
@@ -179,11 +188,23 @@ armhf: test
 s390: ASAN=
 s390: IPV6=0
 s390: CFLAGS += -Wno-stringop-overflow
-s390: DEFS += -DMG_ENABLE_CHACHA20=0
 s390: CC = $(DOCKER) mdashnet/s390 cc
 s390: RUN = $(DOCKER) --init mdashnet/s390
 s390: test
 
+mip_s390: ASAN=
+mip_s390: CC = $(DOCKER) mdashnet/s390 cc
+mip_s390: RUN = $(DOCKER) --init mdashnet/s390
+mip_s390: mip_test
+
+mip_port_s390: ASAN=
+mip_port_s390: IPV6=0
+# This test requires curl, not present in this image
+mip_port_s390: CFLAGS += -DNO_HTTPSERVER_TEST
+mip_port_s390: CC = $(DOCKER) mdashnet/s390 cc
+mip_port_s390: RUN = $(DOCKER) --init mdashnet/s390
+mip_port_s390: mip_port_test
+
 arm: DEFS += -DMG_ENABLE_POSIX_FS=0 -DMG_ENABLE_TCPIP=1 -DMG_ENABLE_TCPIP_DRIVER_INIT=0 -DMG_ARCH=MG_ARCH_ARMGCC -DNO_SLEEP_ABORT
 arm: mongoose.h $(SRCS)
 	$(DOCKER) mdashnet/armgcc arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb $(SRCS) $(OPTS) $(WARN) $(INCS) $(DEFS) $(TFLAGS) -o unit_test -nostartfiles --specs nosys.specs -e 0
@@ -194,7 +215,7 @@ riscv: mongoose.h $(SRCS)
 
 vc98: Makefile mongoose.h $(SRCS)
 	$(DOCKER) mdashnet/vc98 wine cl $(SRCS) $(VCFLAGS) $(DEFS) $(TFLAGS) /Fe$@.exe
-	$(DOCKER) mdashnet/vc98 wine $@.exe
+	$(DOCKER) -e WINEPREFIX=/tmp/wineprefix mdashnet/vc98 wine $@.exe
 
 vc17: Makefile mongoose.h $(SRCS)
 	$(DOCKER) mdashnet/vc17 wine64 cl $(SRCS) $(VCFLAGS) $(DEFS) $(TFLAGS) /Fe$@.exe
@@ -230,11 +251,12 @@ mongoose.c: Makefile $(wildcard ../src/*.c) $(wildcard ../src/drivers/*.c)
 	cd .. && (export LC_ALL=C ; cat src/license.h; echo; echo '#include "mongoose.h"' ; (for F in src/*.c src/drivers/*.c ; do echo; echo '#ifdef MG_ENABLE_LINES'; echo "#line 1 \"$$F\""; echo '#endif'; cat $$F | sed -e 's,#include ".*,,'; done))> $@
 
 mongoose.h: $(HDRS) Makefile
-	cd .. && (cat src/license.h; echo; echo '#ifndef MONGOOSE_H'; echo '#define MONGOOSE_H'; echo; cat src/version.h ; echo; echo '#ifdef __cplusplus'; echo 'extern "C" {'; echo '#endif'; cat src/arch.h src/arch_*.h src/net_ft.h src/net_lwip.h src/net_rl.h src/config.h src/profile.h src/str.h src/queue.h src/fmt.h src/printf.h src/log.h src/timer.h src/fs.h src/util.h src/url.h src/iobuf.h src/base64.h src/md5.h src/sha1.h src/sha256.h src/event.h src/net.h src/http.h src/ssi.h src/tls.h src/tls_x25519.h src/tls_aes128.h src/tls_uecc.h src/tls_chacha20.h src/tls_rsa.h src/tls_mbed.h src/tls_openssl.h src/ws.h src/sntp.h src/mqtt.h src/dns.h src/json.h src/rpc.h src/ota.h src/flash.h src/wifi.h src/net_builtin.h src/drivers/*.h | sed -e '/keep/! s,#include ".*,,' -e 's,^#pragma once,,'; echo; echo '#ifdef __cplusplus'; echo '}'; echo '#endif'; echo '#endif  // MONGOOSE_H')> $@
+	cd .. && (cat src/license.h; echo; echo '#ifndef MONGOOSE_H'; echo '#define MONGOOSE_H'; echo; cat src/version.h ; echo; echo '#ifdef __cplusplus'; echo 'extern "C" {'; echo '#endif'; cat src/arch.h src/arch_*.h src/net_ft.h src/net_lwip.h src/net_rl.h src/config.h src/profile.h src/str.h src/queue.h src/fmt.h src/printf.h src/log.h src/timer.h src/fs.h src/util.h src/url.h src/iobuf.h src/base64.h src/md5.h src/sha1.h src/sha256.h src/event.h src/net.h src/http.h src/ssi.h src/tls.h src/tls_x25519.h src/tls_aes128.h src/tls_uecc.h src/tls_chacha20.h src/tls_rsa.h src/tls_mbed.h src/tls_openssl.h src/ws.h src/sntp.h src/mqtt.h src/dns.h src/json.h src/rpc.h src/ota.h src/flash.h src/wifi.h src/l2.h src/net_builtin.h src/drivers/*.h | sed -e '/keep/! s,#include ".*,,' -e 's,^#pragma once,,'; echo; echo '#ifdef __cplusplus'; echo '}'; echo '#endif'; echo '#endif  // MONGOOSE_H')> $@
 
 
 clean: clean_tutorials clean_tutorials_embedded
 	rm -rf $(PROG) *.exe *.o *.dSYM *_test ut fuzzer *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb slow-unit* _CL_* infer-out data.txt crash-* packed_fs.c pack
+	$(MAKE) -C tls_multirec $@
 	#find tutorials -maxdepth 3 -name zephyr -prune -o -name Makefile -print | xargs dirname | xargs -n1 make clean -C
 
 

test/data/ca.pem

@@ -1,6 +1,3 @@
-- Make sure your PEM file starts with a dash -
-
-
 Issuer: C=US, O=Internet Security Research Group, CN=ISRG Root X1
 Not Before: Mar 13 00:00:00 2024 GMT
 Not After : Mar 12 23:59:59 2027 GMT

test/data/e5.crt

@@ -1,33 +0,0 @@
-- Make sure your PEM file starts with a dash -
-
-
-Issuer: C=US, O=Internet Security Research Group, CN=ISRG Root X1
-Not Before: Mar 13 00:00:00 2024 GMT
-Not After : Mar 12 23:59:59 2027 GMT
------BEGIN CERTIFICATE-----
-MIIEVzCCAj+gAwIBAgIRAIOPbGPOsTmMYgZigxXJ/d4wDQYJKoZIhvcNAQELBQAw
-TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
-cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMjQwMzEzMDAwMDAw
-WhcNMjcwMzEyMjM1OTU5WjAyMQswCQYDVQQGEwJVUzEWMBQGA1UEChMNTGV0J3Mg
-RW5jcnlwdDELMAkGA1UEAxMCRTUwdjAQBgcqhkjOPQIBBgUrgQQAIgNiAAQNCzqK
-a2GOtu/cX1jnxkJFVKtj9mZhSAouWXW0gQI3ULc/FnncmOyhKJdyIBwsz9V8UiBO
-VHhbhBRrwJCuhezAUUE8Wod/Bk3U/mDR+mwt4X2VEIiiCFQPmRpM5uoKrNijgfgw
-gfUwDgYDVR0PAQH/BAQDAgGGMB0GA1UdJQQWMBQGCCsGAQUFBwMCBggrBgEFBQcD
-ATASBgNVHRMBAf8ECDAGAQH/AgEAMB0GA1UdDgQWBBSfK1/PPCFPnQS37SssxMZw
-i9LXDTAfBgNVHSMEGDAWgBR5tFnme7bl5AFzgAiIyBpY9umbbjAyBggrBgEFBQcB
-AQQmMCQwIgYIKwYBBQUHMAKGFmh0dHA6Ly94MS5pLmxlbmNyLm9yZy8wEwYDVR0g
-BAwwCjAIBgZngQwBAgEwJwYDVR0fBCAwHjAcoBqgGIYWaHR0cDovL3gxLmMubGVu
-Y3Iub3JnLzANBgkqhkiG9w0BAQsFAAOCAgEAH3KdNEVCQdqk0LKyuNImTKdRJY1C
-2uw2SJajuhqkyGPY8C+zzsufZ+mgnhnq1A2KVQOSykOEnUbx1cy637rBAihx97r+
-bcwbZM6sTDIaEriR/PLk6LKs9Be0uoVxgOKDcpG9svD33J+G9Lcfv1K9luDmSTgG
-6XNFIN5vfI5gs/lMPyojEMdIzK9blcl2/1vKxO8WGCcjvsQ1nJ/Pwt8LQZBfOFyV
-XP8ubAp/au3dc4EKWG9MO5zcx1qT9+NXRGdVWxGvmBFRAajciMfXME1ZuGmk3/GO
-koAM7ZkjZmleyokP1LGzmfJcUd9s7eeu1/9/eg5XlXd/55GtYjAM+C4DG5i7eaNq
-cm2F+yxYIPt6cbbtYVNJCGfHWqHEQ4FYStUyFnv8sjyqU8ypgZaNJ9aVcWSICLOI
-E1/Qv/7oKsnZCWJ926wU6RqG1OYPGOi1zuABhLw61cuPVDT28nQS/e6z95cJXq0e
-K1BcaJ6fJZsmbjRgD5p3mvEf5vdQM7MCEvU0tHbsx2I5mHHJoABHb8KVBgWp/lcX
-GWiWaeOyB7RP+OfDtvi2OsapxXiV7vNVs7fMlrRjY1joKaqmmycnBvAq14AEbtyL
-sVfOS66B8apkeFX2NY4XPEYV4ZSCe8VHPrdrERk2wILG3T/EGmSIkCYVUMSnjmJd
-VQD9F6Na/+zmXCc=
------END CERTIFICATE-----
-

test/data/e8.crt

@@ -0,0 +1,32 @@
+
+ 1 s:C=US, O=Let's Encrypt, CN=E8
+   i:C=US, O=Internet Security Research Group, CN=ISRG Root X1
+   a:PKEY: id-ecPublicKey, 384 (bit); sigalg: RSA-SHA256
+   v:NotBefore: Mar 13 00:00:00 2024 GMT; NotAfter: Mar 12 23:59:59 2027 GMT
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+

test/data/ss_ca.pem

@@ -1,5 +1,3 @@
-- Make sure your PEM file starts with a dash -
-
 Certificate:
     Data:
         Version: 3 (0x2)

test/data/ss_client.pem

@@ -1,5 +1,3 @@
-- Make sure your PEM file starts with a dash -
-
 Certificate:
     Data:
         Version: 3 (0x2)

test/data/ss_server.pem

@@ -1,5 +1,3 @@
-- Make sure your PEM file starts with a dash -
-
 Certificate:
     Data:
         Version: 3 (0x2)

test/fuzz.c

@@ -62,6 +62,14 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     mg_crc32(0, mm.topic.buf, mm.topic.len);
     mg_crc32(0, mm.data.buf, mm.data.len);
     mg_crc32(0, mm.dgram.buf, mm.dgram.len);
+    {
+      struct mg_mqtt_prop prop;
+      size_t ofs = 0;
+      while ((ofs = mg_mqtt_next_prop(&mm, &prop, ofs)) > 0) {
+          mg_crc32(0, prop.key.buf, prop.key.len);
+          mg_crc32(0, prop.val.buf, prop.val.len);
+      }
+    }
   }
   mg_mqtt_parse(NULL, 0, 5, &mm);
 
@@ -86,9 +94,19 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
 
   // Test built-in TCP/IP stack
   if (size > 0) {
-    struct mg_tcpip_if mif = {.ip = 0x01020304,
+    struct mg_tcpip_if mif = {.ip = 1,
                               .mask = 255,
-                              .gw = 0x01010101,
+                              .gw = 1,
+                              .gw_ready = true,
+                              .state = MG_TCPIP_STATE_READY,
+#if MG_ENABLE_IPV6
+                              .ip6[0] = 1;
+                              .prefix[0] = 1;
+                              .prefix_len = 64;
+                              .gw6[0] = 1;
+                              .gw6_ready = true;
+                              .state6 = MG_TCPIP_STATE_READY;  // so mg_send() works and RS stops
+#endif
                               .driver = &mg_tcpip_driver_mock};
     struct mg_mgr mgr;
     mg_mgr_init(&mgr);
@@ -100,45 +118,61 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     memcpy(pkt, data, size);
     if (size > sizeof(*eth)) {
       static size_t i;
-      uint16_t eth_types[] = {0x800, 0x806, 0x86dd}; // IPv4, ARP, IPv6
+      // eth_types[] exists in l2_eth.c
       memcpy(eth->dst, mif.mac, 6);  // Set valid destination MAC
       // send all handled eth types, then 2 random ones
       if (i >= (sizeof(eth_types) / sizeof(eth_types[0]) + 2)) i = 0;
-      if (i < (sizeof(eth_types) / sizeof(eth_types[0]))) eth->type = (eth_types[i++]);
+      if (i < (sizeof(eth_types) / sizeof(eth_types[0]))) eth->type = mg_htons(eth_types[i++]);
       // build proper layer-3 datagrams, to be able to exercise layers above
       if (eth->type == mg_htons(0x800) && size > (sizeof(*eth) + sizeof(struct ip))) {             // IPv4
         static size_t j;
         uint8_t ip_protos[] = {1, 6, 17}; // ICMP, TCP, UDP
         struct ip *ip4 = (struct ip *) (eth + 1);
         ip4->ver = (ip4->ver & ~0xf0) | (4 << 4);
-        // send all handled ip protos, then 2 random ones
+        // send all handled IP protos, then 2 random ones
         if (j >= (sizeof(ip_protos) / sizeof(ip_protos[0]) + 2)) j = 0;
         if (j < (sizeof(ip_protos) / sizeof(ip_protos[0]))) ip4->proto = (ip_protos[j++]);
         if (ip4->proto == 1) { // ICMP
         } else if (ip4->proto == 6) { // TCP
-        } else if (ip4->proto == 17 && size > (sizeof(*eth) + sizeof(struct ip) + sizeof(struct udp))) { // UDP
+        } else if (ip4->proto == 17) { // UDP
-          static size_t k;
+          if (size > (sizeof(*eth) + sizeof(struct ip) + sizeof(struct udp))) {
-          uint16_t udp_ports[] = {67, 68}; // DHCP server and client
+            static size_t k;
-          struct udp *udp = (struct udp *) (ip4 + 1);
+            uint16_t udp_ports[] = {67, 68}; // DHCP server and client
-          // send all handled udp ports, then 2 random ones
+            struct udp *udp = (struct udp *) (ip4 + 1);
-          if (k >= (sizeof(udp_ports) / sizeof(udp_ports[0]) + 2)) k = 0;
+            // send all handled UDP ports, then 2 random ones
-          if (k < (sizeof(udp_ports) / sizeof(udp_ports[0]))) udp->dport = mg_htons(udp_ports[k++]);
+            if (k >= (sizeof(udp_ports) / sizeof(udp_ports[0]) + 2)) k = 0;
+            if (k < (sizeof(udp_ports) / sizeof(udp_ports[0]))) udp->dport = mg_htons(udp_ports[k++]);
+          }
         }
       } else if (eth->type == mg_htons(0x806)) {      // ARP
+
       } else if (eth->type == mg_htons(0x86dd) && size > (sizeof(*eth) + sizeof(struct ip6))) {     // IPv6
         static size_t j;
-        uint8_t ip6_protos[] = {6, 17}; // TCP, UDP
+        uint8_t ip6_protos[] = {6, 17, 58}; // TCP, UDP, ICMPv6
         struct ip6 *ip6 = (struct ip6 *) (eth + 1);
         ip6->ver = (ip6->ver & ~0xf0) | (6 << 4);
-        // send all handled ip6 "next headers", then 2 random ones
+        // send all handled IPv6 "next headers", then 2 random ones
         if (j >= (sizeof(ip6_protos) / sizeof(ip6_protos[0]) + 2)) j = 0;
-        if (j < (sizeof(ip6_protos) / sizeof(ip6_protos[0]))) ip6->proto = (ip6_protos[j++]);
+        if (j < (sizeof(ip6_protos) / sizeof(ip6_protos[0]))) ip6->next = (ip6_protos[j++]);
-        if (ip6->proto == 6) { // TCP
+        if (ip6->next == 6) { // TCP
-        } else if (ip6->proto == 17) { // UDP
+        } else if (ip6->next == 17) { // UDP
-        }    
+        } else if (ip6->next == 58) { // ICMPv6
+          if (size >= (sizeof(*eth) + sizeof(struct ip6) + sizeof(struct icmp6))) {
+            static size_t k;
+            uint8_t icmp6_types[] = {128, 134, 135, 136}; // Echo Request, RA, NS, NA
+            struct icmp6 *icmp6 = (struct icmp6 *) (ip6 + 1);
+            // send all handled ICMPv6 types, then 2 random ones
+            if (k >= (sizeof(icmp6_types) / sizeof(icmp6_types[0]) + 2)) k = 0;
+            if (k < (sizeof(icmp6_types) / sizeof(icmp6_types[0]))) icmp6->type = icmp6_types[k++];
+          }
+        }
       }
     }
 
+#if defined(MAIN)
+    printf("Sending to net_builtin:\n");
+    mg_hexdump(pkt, size);
+#endif
     mg_tcpip_rx(&mif, pkt, size);
 
     // Test HTTP serving (via our built-in TCP/IP stack)

test/fuzz_tls.c

@@ -18,10 +18,11 @@ int LLVMFuzzerTestOneInput(const uint8_t *, size_t);
 // Preprocessor magic, just add/remove functions here and leave the rest alone
 #define TABLE(_) \
 _(mg_tls_server_recv_hello) \
-//_(mg_tls_client_recv_hello) \
+_(mg_tls_server_recv_finish) \
-//_(mg_tls_client_recv_ext ) \
+_(mg_tls_client_recv_hello) \
-//_(mg_tls_client_recv_cert) \
+_(mg_tls_client_recv_finish) \
-//_(mg_tls_client_recv_cert_verify) \
+_(mg_tls_client_recv_ext) \
+_(mg_tls_recv_cert_verify) \
 // ... 
 
 struct f {
@@ -52,7 +53,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     c = &c_[i];
     io = &c->rtls;
     if (i > 0) memcpy(c, &c_[0], sizeof(*c)); // copy from 1st one
-    if (i > 0) c->is_client = 1;  // from 1 on, client functions
+    if (i > 1) c->is_client = 1;  // from 2 on, client functions
     memset(&tls_[i], 0, sizeof(struct tls_data));
     if (io->size - io->len < size && !mg_iobuf_resize(io, io->len + size)) {
       mg_error(c, "oom");
@@ -64,10 +65,31 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
 #ifdef PRINT_FUNCNAME
     printf("CALLING %s\n", f_[i].name);
 #endif
-    f_[i].f(&c[i]);
+    f_[i].f(c);
     mg_iobuf_free(io);
   }
-  
+
+  // mg_tls_recv_cert() has an extra bool parameter 
+  c = &c_[0]; // reuse first one
+  c->tls = &tls_[0];
+  for (i = 0; i < 2; i++) {
+    struct mg_iobuf *io;
+    io = &c->rtls;
+    c->is_client = (i > 0);
+    memset(c->tls, 0, sizeof(struct tls_data));
+    if (io->size - io->len < size && !mg_iobuf_resize(io, io->len + size)) {
+      mg_error(c, "oom");
+      return 0; // drop it
+    }
+    memcpy(&io->buf[io->len], data, size);
+    io->len += size;
+#ifdef PRINT_FUNCNAME
+    printf("CALLING mg_tls_recv_cert\n");
+#endif
+    mg_tls_recv_cert(c, !c->is_client); // call server for client and client for server
+    mg_iobuf_free(io);
+  }
+
   return 0;
 }
 

test/health.awk

@@ -0,0 +1,11 @@
+#!/usr/bin/env -S gawk -f
+# gawk used to avoid "towc" errors seen on MacOS. env used to circumvent brew installing it wherever they like
+
+BEGIN {
+	FS="\t"
+	print "{"
+}
+/HEALTH_DASHBOARD/ { print $2 }
+END {
+	print "}"
+}

test/health.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+cd /data/downloads/health
+find . -mtime +28 -not -name 'index*.json' -delete
+find . -name "*.json" -not -name 'index*.json' | jq -R . | jq -s . > index.json

test/mip_port_test.c

@@ -0,0 +1,120 @@
+#define MIPPORTTEST_USING_DHCP 1
+
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+
+#include "mip_x_test.c"
+
+struct port_driver_data {
+  int sockfd;
+  struct sockaddr_in port_addr;
+  struct sockaddr_in tap_addr;
+};
+
+// MIP Socket driver
+static size_t sock_rx(void *buf, size_t len, struct mg_tcpip_if *ifp) {
+  ssize_t received = recv(((struct port_driver_data *)ifp->driver_data)->sockfd, buf, len, 0); 
+  usleep(1);  // This is to avoid 100% CPU
+  if (received < 0) return 0;
+  return (size_t) received;
+}
+
+static size_t sock_tx(const void *buf, size_t len, struct mg_tcpip_if *ifp) {
+  ssize_t res = send(((struct port_driver_data *)ifp->driver_data)->sockfd, buf, len, 0); 
+  if (res < 0) {
+    MG_ERROR(("sock_tx failed: %d", errno));
+    return 0;
+  }
+  return (size_t) res;
+}
+
+static bool sock_poll(struct mg_tcpip_if *ifp, bool s1) {
+  return s1 && ifp->driver_data ? true : false;
+}
+
+
+int main(void) {
+  bool result;
+  const char *debug_level = getenv("V");
+  // Setup interface
+  const uint16_t port = 0xAA55;           // UDP port
+  const uint16_t tap_port = 0x55AA;       // UDP port for TAP socket
+  const char *mac = "02:00:01:02:03:78";  // MAC address
+
+	struct port_driver_data pdd;
+  pdd.sockfd = socket(AF_INET, SOCK_DGRAM, 0); 
+	pdd.port_addr.sin_family = AF_INET;
+	pdd.port_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+	pdd.port_addr.sin_port = htons(port);
+	if (bind(pdd.sockfd, (struct sockaddr *) &pdd.port_addr, sizeof(pdd.port_addr)) < 0) return EXIT_FAILURE; 
+  printf("Opened UDP socket: 127.0.0.1:%u (0x%04x)\n", port, port);
+
+	pdd.tap_addr.sin_family = AF_INET;
+	pdd.tap_addr.sin_addr.s_addr =  htonl(0x7f000001U);  // 127.0.0.1
+	pdd.tap_addr.sin_port = htons(0x55AA);
+	if (connect(pdd.sockfd, (struct sockaddr *) &pdd.tap_addr, sizeof(pdd.tap_addr)) < 0) return EXIT_FAILURE; 
+  printf("Connected to TAP UDP socket: 127.0.0.1:%u (0x%04x)\n", tap_port, tap_port);
+
+  usleep(200000);  // 200 ms
+
+  if (debug_level == NULL) debug_level = "3";
+  mg_log_set(atoi(debug_level));
+
+  struct mg_mgr mgr;  // Event manager
+  mg_mgr_init(&mgr);  // Initialise event manager
+
+  // MIP driver
+  struct mg_tcpip_driver driver;
+  memset(&driver, 0, sizeof(driver));
+
+  driver.tx = sock_tx;
+  driver.poll = sock_poll;
+  driver.rx = sock_rx;
+
+  struct mg_tcpip_if mif;
+  memset(&mif, 0, sizeof(mif));
+
+  mif.driver = &driver;
+  mif.driver_data = &pdd;
+
+#if MIPPORTTEST_USING_DHCP == 1
+#else
+  mif.ip = mg_htonl(MG_U32(192, 168, 32, 2));  // Triggering a network failure
+  mif.mask = mg_htonl(MG_U32(255, 255, 255, 0));
+  mif.gw = mg_htonl(MG_U32(192, 168, 32, 1));
+#endif
+
+  sscanf(mac, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &mif.mac[0], &mif.mac[1],
+         &mif.mac[2], &mif.mac[3], &mif.mac[4], &mif.mac[5]);
+
+  mg_tcpip_init(&mgr, &mif);
+  MG_INFO(("Init done, starting main loop"));
+  usleep(200000);  // 200 ms
+
+  // Stack initialization, Network configuration (DHCP lease, ...)
+#if MIPPORTTEST_USING_DHCP == 0
+  MG_INFO(("MIF configuration: Static IP"));
+  ASSERT(mif.ip != 0);     // Check we have a satic IP assigned
+  mg_mgr_poll(&mgr, 100);  // For initialisation
+#else
+  MG_INFO(("MIF configuration: DHCP"));
+  ASSERT(!mif.ip);  // Check we are set for DHCP
+  int pc = 500;     // Timeout on DHCP lease 500 ~ approx 5s (typical delay <1s)
+  while (((pc--) > 0) && !mif.ip) {
+    mg_mgr_poll(&mgr, 100);
+    usleep(10000);  // 10 ms
+  }
+  if (!mif.ip) MG_ERROR(("No ip assigned (DHCP lease may have failed).\n"));
+  ASSERT(mif.ip);  // We have an IP (lease or static)
+#endif
+  while (mif.state != MG_TCPIP_STATE_READY) {
+    mg_mgr_poll(&mgr, 100);
+    usleep(10000);  // 10 ms
+  }
+
+  // RUN TESTS
+  result = mip_x_test(&mgr);
+  close(pdd.sockfd);
+  if (!result) return EXIT_FAILURE;
+  return EXIT_SUCCESS;
+}

test/mip_tap_test.c

@@ -1,10 +1,5 @@
-#define MG_ENABLE_TCPIP 1
-#define MG_ENABLE_TCPIP_DRIVER_INIT 0
-
 #define MIPTAPTEST_USING_DHCP 1
 
-#define FETCH_BUF_SIZE (16 * 1024)
-
 #include <sys/socket.h>
 #ifndef __OpenBSD__
 #include <linux/if.h>
@@ -16,105 +11,8 @@
 #endif
 #include <sys/ioctl.h>
 
-#include "mongoose.c"
+#include "mip_x_test.c"
 
-#include "driver_mock.c"
-
-#ifdef MQTT_LOCALHOST
-#define MQTT_URL "mqtt://127.0.0.1:1883"
-#else
-#define MQTT_URL "mqtt://broker.hivemq.com:1883"
-#endif
-#if MG_TLS == MG_TLS_BUILTIN
-#define MQTTS_URL "mqtts://mongoose.ws:8883"  // test requires TLS 1.3
-#define MQTTS_CA mg_str(s_ca_cert)
-static const char *s_ca_cert =
-    "-----BEGIN CERTIFICATE-----\n"
-    "MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw\n"
-    "TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh\n"
-    "cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTUwNjA0MTEwNDM4\n"
-    "WhcNMzUwNjA0MTEwNDM4WjBPMQswCQYDVQQGEwJVUzEpMCcGA1UEChMgSW50ZXJu\n"
-    "ZXQgU2VjdXJpdHkgUmVzZWFyY2ggR3JvdXAxFTATBgNVBAMTDElTUkcgUm9vdCBY\n"
-    "MTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAK3oJHP0FDfzm54rVygc\n"
-    "h77ct984kIxuPOZXoHj3dcKi/vVqbvYATyjb3miGbESTtrFj/RQSa78f0uoxmyF+\n"
-    "0TM8ukj13Xnfs7j/EvEhmkvBioZxaUpmZmyPfjxwv60pIgbz5MDmgK7iS4+3mX6U\n"
-    "A5/TR5d8mUgjU+g4rk8Kb4Mu0UlXjIB0ttov0DiNewNwIRt18jA8+o+u3dpjq+sW\n"
-    "T8KOEUt+zwvo/7V3LvSye0rgTBIlDHCNAymg4VMk7BPZ7hm/ELNKjD+Jo2FR3qyH\n"
-    "B5T0Y3HsLuJvW5iB4YlcNHlsdu87kGJ55tukmi8mxdAQ4Q7e2RCOFvu396j3x+UC\n"
-    "B5iPNgiV5+I3lg02dZ77DnKxHZu8A/lJBdiB3QW0KtZB6awBdpUKD9jf1b0SHzUv\n"
-    "KBds0pjBqAlkd25HN7rOrFleaJ1/ctaJxQZBKT5ZPt0m9STJEadao0xAH0ahmbWn\n"
-    "OlFuhjuefXKnEgV4We0+UXgVCwOPjdAvBbI+e0ocS3MFEvzG6uBQE3xDk3SzynTn\n"
-    "jh8BCNAw1FtxNrQHusEwMFxIt4I7mKZ9YIqioymCzLq9gwQbooMDQaHWBfEbwrbw\n"
-    "qHyGO0aoSCqI3Haadr8faqU9GY/rOPNk3sgrDQoo//fb4hVC1CLQJ13hef4Y53CI\n"
-    "rU7m2Ys6xt0nUW7/vGT1M0NPAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNV\n"
-    "HRMBAf8EBTADAQH/MB0GA1UdDgQWBBR5tFnme7bl5AFzgAiIyBpY9umbbjANBgkq\n"
-    "hkiG9w0BAQsFAAOCAgEAVR9YqbyyqFDQDLHYGmkgJykIrGF1XIpu+ILlaS/V9lZL\n"
-    "ubhzEFnTIZd+50xx+7LSYK05qAvqFyFWhfFQDlnrzuBZ6brJFe+GnY+EgPbk6ZGQ\n"
-    "3BebYhtF8GaV0nxvwuo77x/Py9auJ/GpsMiu/X1+mvoiBOv/2X/qkSsisRcOj/KK\n"
-    "NFtY2PwByVS5uCbMiogziUwthDyC3+6WVwW6LLv3xLfHTjuCvjHIInNzktHCgKQ5\n"
-    "ORAzI4JMPJ+GslWYHb4phowim57iaztXOoJwTdwJx4nLCgdNbOhdjsnvzqvHu7Ur\n"
-    "TkXWStAmzOVyyghqpZXjFaH3pO3JLF+l+/+sKAIuvtd7u+Nxe5AW0wdeRlN8NwdC\n"
-    "jNPElpzVmbUq4JUagEiuTDkHzsxHpFKVK7q4+63SM1N95R1NbdWhscdCb+ZAJzVc\n"
-    "oyi3B43njTOQ5yOf+1CceWxG1bQVs5ZufpsMljq4Ui0/1lvh+wjChP4kqKOJ2qxq\n"
-    "4RgqsahDYVvTH9w7jXbyLeiNdd8XM2w9U/t7y0Ff/9yi0GE44Za4rF2LN9d11TPA\n"
-    "mRGunUHBcnWEvgJBQl9nJEiU0Zsnvgc/ubhPgXRR4Xq37Z0j4r7g1SgEEzwxA57d\n"
-    "emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc=\n"
-    "-----END CERTIFICATE-----\n";
-#elif MG_TLS
-#ifdef MQTT_LOCALHOST
-// we'll generate MQTTS_URL
-#define MQTTS_CA mg_str(s_ca_cert)
-static const char *s_ca_cert =
-    "-----BEGIN CERTIFICATE-----\n"
-    "MIIBFTCBvAIJAMNTFtpfcq8NMAoGCCqGSM49BAMCMBMxETAPBgNVBAMMCE1vbmdv\n"
-    "b3NlMB4XDTI0MDUwNzE0MzczNloXDTM0MDUwNTE0MzczNlowEzERMA8GA1UEAwwI\n"
-    "TW9uZ29vc2UwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAASuP+86T/rOWnGpEVhl\n"
-    "fxYZ+pjMbCmDZ+vdnP0rjoxudwRMRQCv5slRlDK7Lxue761sdvqxWr0Ma6TFGTNg\n"
-    "epsRMAoGCCqGSM49BAMCA0gAMEUCIQCwb2CxuAKm51s81S6BIoy1IcandXSohnqs\n"
-    "us64BAA7QgIgGGtUrpkgFSS0oPBlCUG6YPHFVw42vTfpTC0ySwAS0M4=\n"
-    "-----END CERTIFICATE-----\n";
-#else
-#define MQTTS_URL "mqtts://broker.hivemq.com:8883"
-#define MQTTS_CA mg_unpacked("/data/ca.pem")
-#endif // MQTT_LOCALHOST
-#endif
-
-static char *host_ip;
-
-static int s_num_tests = 0;
-
-#ifdef NO_SLEEP_ABORT
-#define ABORT() abort()
-#else
-#define ABORT()                       \
-  sleep(2); /* 2s, GH print reason */ \
-  abort();
-#endif
-
-#define ASSERT(expr)                                            \
-  do {                                                          \
-    s_num_tests++;                                              \
-    if (!(expr)) {                                              \
-      printf("FAILURE %s:%d: %s\n", __FILE__, __LINE__, #expr); \
-      fflush(stdout);                                           \
-      ABORT();                                                  \
-    }                                                           \
-  } while (0)
-
-static struct mg_http_message gethm(const char *buf) {
-  struct mg_http_message hm;
-  memset(&hm, 0, sizeof(hm));
-  mg_http_parse(buf, strlen(buf), &hm);
-  return hm;
-}
-
-static int cmpbody(const char *buf, const char *str) {
-  struct mg_str s = mg_str(str);
-  struct mg_http_message hm = gethm(buf);
-  size_t len = strlen(buf);
-  if (hm.body.len > len) hm.body.len = len - (size_t) (hm.body.buf - buf);
-  return mg_strcmp(hm.body, s);
-}
 
 // MIP TUNTAP driver
 static size_t tap_rx(void *buf, size_t len, struct mg_tcpip_if *ifp) {
@@ -137,311 +35,9 @@ static bool tap_poll(struct mg_tcpip_if *ifp, bool s1) {
   return s1 && ifp->driver_data ? true : false;
 }
 
-static void eh1(struct mg_connection *c, int ev, void *ev_data) {
-  struct mg_tls_opts *topts = (struct mg_tls_opts *) c->fn_data;
-  if (ev == MG_EV_ACCEPT && topts != NULL) mg_tls_init(c, topts);
-  if (ev == MG_EV_HTTP_MSG) {
-    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
-    MG_DEBUG(("[%.*s %.*s] message len %d", (int) hm->method.len,
-              hm->method.buf, (int) hm->uri.len, hm->uri.buf,
-              (int) hm->message.len));
-    if (mg_match(hm->uri, mg_str("/foo/*"), NULL)) {
-      mg_http_reply(c, 200, "", "uri: %.*s", hm->uri.len - 5, hm->uri.buf + 5);
-    } else if (mg_match(hm->uri, mg_str("/ws"), NULL)) {
-      mg_ws_upgrade(c, hm, NULL);
-    } else if (mg_match(hm->uri, mg_str("/body"), NULL)) {
-      mg_http_reply(c, 200, "", "%.*s", (int) hm->body.len, hm->body.buf);
-    } else {
-      struct mg_http_serve_opts sopts;
-      memset(&sopts, 0, sizeof(sopts));
-      sopts.root_dir = "./data";
-      mg_http_serve_dir(c, hm, &sopts);
-    }
-  } else if (ev == MG_EV_WS_OPEN) {
-    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
-    ASSERT(mg_strcmp(hm->uri, mg_str("/ws")) == 0);
-    mg_ws_send(c, "opened", 6, WEBSOCKET_OP_BINARY);
-  } else if (ev == MG_EV_WS_MSG) {
-    struct mg_ws_message *wm = (struct mg_ws_message *) ev_data;
-    mg_ws_send(c, wm->data.buf, wm->data.len, WEBSOCKET_OP_BINARY);
-  }
-}
-struct fetch_data {
-  char *buf;
-  const char *url;
-  int code, closed;
-};
-
-static void fcb(struct mg_connection *c, int ev, void *ev_data) {
-  struct fetch_data *fd = (struct fetch_data *) c->fn_data;
-  if (ev == MG_EV_CONNECT) {
-    MG_DEBUG(("CONNECT"));
-    if (mg_url_is_ssl(fd->url)) {
-      struct mg_tls_opts opts;
-      memset(&opts, 0, sizeof(opts));  // read CA from packed_fs
-      if (host_ip != NULL && strstr(fd->url, host_ip) != NULL) {
-        MG_DEBUG(("Local connection, using self-signed certificates"));
-        opts.name = mg_str_s("localhost");
-        opts.ca = mg_unpacked("/certs/ca.crt");
-      } else {
-        opts.name = mg_url_host(fd->url);
-        opts.ca = mg_unpacked("/data/ca.pem");
-#if MG_TLS == MG_TLS_BUILTIN
-        // our TLS does not search for the proper CA in a bundle
-        opts.ca = mg_file_read(&mg_fs_posix, "data/e5.crt");
-#endif
-      }
-      mg_tls_init(c, &opts);
-#if MG_TLS == MG_TLS_BUILTIN
-      mg_free((void *) opts.ca.buf);
-#endif
-    }
-  } else if (ev == MG_EV_HTTP_MSG) {
-    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
-    snprintf(fd->buf, FETCH_BUF_SIZE, "%.*s", (int) hm->message.len,
-             hm->message.buf);
-    fd->code = atoi(hm->uri.buf);
-    fd->closed = 1;
-    c->is_closing = 1;
-    MG_DEBUG(("CODE: %d, MSG: %.*s", fd->code, (int) hm->message.len,
-              hm->message.buf));
-    (void) c;
-  } else if (ev == MG_EV_CLOSE) {
-    MG_DEBUG(("CLOSE"));
-    fd->closed = 1;
-  } else if (ev == MG_EV_READ) {
-    long bytes = *(long *) ev_data;
-    MG_DEBUG(("READ %d: %.*s", (int) bytes, (int) bytes, c->recv.buf));
-  }
-}
-
-static int fetch(struct mg_mgr *mgr, char *buf, const char *url,
-                 const char *fmt, ...) {
-  struct fetch_data fd = {buf, url, 0, 0};
-  int i;
-  struct mg_connection *c = NULL;
-  va_list ap;
-  mg_mgr_poll(mgr, 0);  // update ifp->now to avoid ARP lookup using an old
-                        // timestamp (from an ancient call in other test)
-  c = mg_http_connect(mgr, url, fcb, &fd);
-  ASSERT(c != NULL);
-  va_start(ap, fmt);
-  mg_vprintf(c, fmt, &ap);
-  va_end(ap);
-  buf[0] = '\0';
-  // - TLS: multiple (small) records: allow enough loops so mg_mgr_poll can
-  // process buffered records when no more frames are coming in
-  for (i = 0; i < 500 && buf[0] == '\0' && !fd.closed; i++) {
-    mg_mgr_poll(mgr, 0);
-    usleep(5000);  // 5 ms. Slow down poll loop to ensure packet transit, but
-                   // allow enough loops to get the ARP response, otherwise,
-                   // given enough traffic, the timer expires before we get a
-                   // chance to see the response
-  }
-  if (!fd.closed) c->is_closing = 1;
-  mg_mgr_poll(mgr, 0);
-  return fd.code;
-}
-
-static void test_http_client(struct mg_mgr *mgr) {
-  char buf[FETCH_BUF_SIZE];
-  int rc = 0;
-  const bool ipv6 = 0;
-#if MG_TLS
-  if (ipv6) {
-    rc = fetch(mgr, buf, "https://ipv6.google.com",
-               "GET / HTTP/1.0\r\nHost: ipv6.google.com\r\n\r\n");
-  } else {
-    rc = fetch(mgr, buf, "https://cesanta.com",
-               "GET /robots.txt HTTP/1.0\r\nHost: cesanta.com\r\n\r\n");
-  }
-  ASSERT(rc == 200);  // OK
-#else
-  if (ipv6) {
-    rc = fetch(mgr, buf, "http://ipv6.google.com",
-               "GET / HTTP/1.0\r\nHost: ipv6.google.com\r\n\r\n");
-  } else {
-    rc = fetch(mgr, buf, "http://cesanta.com",
-               "GET /robots.txt HTTP/1.0\r\nHost: cesanta.com\r\n\r\n");
-  }
-  ASSERT(rc == 301);  // OK: Permanently moved (HTTP->HTTPS redirect)
-
-#endif
-}
-
-static struct mg_connection *s_conn;
-static char s_topic[16];
-
-struct mqtt_data {
-  char *url;
-  bool passed;
-};
-
-static void mqtt_fn(struct mg_connection *c, int ev, void *ev_data) {
-  struct mqtt_data *data = (struct mqtt_data *) c->fn_data;
-  if (ev == MG_EV_CONNECT) {
-    MG_DEBUG(("CONNECT"));
-#if MG_TLS
-    struct mg_tls_opts opts;
-    memset(&opts, 0, sizeof(opts));
-    opts.ca = MQTTS_CA;
-    opts.name = mg_url_host(data->url);
-    mg_tls_init(c, &opts);
-#endif
-  } else if (ev == MG_EV_MQTT_OPEN) {
-    MG_DEBUG(("MQTT CONNECT"));
-    struct mg_mqtt_opts sub_opts;
-    memset(&sub_opts, 0, sizeof(sub_opts));
-    sub_opts.topic = mg_str(mg_random_str(s_topic, sizeof(s_topic)));
-    sub_opts.qos = 1;
-    mg_mqtt_sub(c, &sub_opts);
-    struct mg_mqtt_opts pub_opts;
-    memset(&pub_opts, 0, sizeof(pub_opts));
-    pub_opts.topic = sub_opts.topic;
-    pub_opts.message = mg_str("hi");
-    pub_opts.qos = 1, pub_opts.retain = false;
-    mg_mqtt_pub(c, &pub_opts);
-  } else if (ev == MG_EV_MQTT_MSG) {
-    struct mg_mqtt_message *mm = (struct mg_mqtt_message *) ev_data;
-    MG_DEBUG(("TOPIC: %.*s, MSG: %.*s", (int) mm->topic.len, mm->topic.buf,
-              mm->data.len > 10 ? 10 : (int) mm->data.len, mm->data.buf));
-    ASSERT(mm->topic.len == strlen(s_topic) &&
-           strncmp(mm->topic.buf, s_topic, mm->topic.len) == 0);
-    if (mm->data.len == 2 && strncmp(mm->data.buf, "hi", 2) == 0) {
-      struct mg_mqtt_opts pub_opts;
-      memset(&pub_opts, 0, sizeof(pub_opts));
-      pub_opts.topic = mm->topic;
-      // send more than 1 record, content is not relevant
-      pub_opts.message = mg_str_n((char *)(size_t) mqtt_fn, 21098);
-      pub_opts.qos = 1, pub_opts.retain = false;
-      mg_mqtt_pub(c, &pub_opts);
-    } else if (mm->data.len == 8 && strncmp(mm->data.buf, "farewell", 8) == 0) {
-      // close on farewell
-      MG_INFO(("%lu CLOSING", c->id));
-      mg_mqtt_disconnect(c, NULL);
-      data->passed = true;
-    } else if (mm->data.len == 21098) {
-      struct mg_mqtt_opts pub_opts;
-      ASSERT(memcmp((const char *) (size_t) mqtt_fn, mm->data.buf, 21098) == 0);
-      // send farewell after receiving big data
-      memset(&pub_opts, 0, sizeof(pub_opts));
-      pub_opts.topic = mm->topic;
-      pub_opts.message = mg_str("farewell");
-      pub_opts.qos = 1, pub_opts.retain = false;
-      mg_mqtt_pub(c, &pub_opts);
-    }
-  } else if (ev == MG_EV_CLOSE) {
-    MG_DEBUG(("CLOSE"));
-    s_conn = NULL;
-  } else if (ev == MG_EV_ERROR) {
-    MG_ERROR(("%lu ERROR %s", c->id, (char *) ev_data));
-  }
-}
-
-static void test_mqtt_connsubpub(struct mg_mgr *mgr) {
-  struct mqtt_data data;
-  struct mg_mqtt_opts opts;
-  memset(&opts, 0, sizeof(opts));
-  opts.clean = true, opts.version = 4;
-  data.passed = false;
-#if defined(MQTT_LOCALHOST) && MG_TLS != MG_TLS_BUILTIN
-  if (host_ip == NULL) {
-    printf("\nMQTT_LOCALHOST defined but no HOST_IP provided, skipping MQTTS tests\n");
-    return;
-  }
-  printf("HOST_IP: %s\n", host_ip);
-#endif
-#if MG_TLS
-#if defined(MQTT_LOCALHOST) && MG_TLS != MG_TLS_BUILTIN
-  data.url = mg_mprintf("mqtts://%s:8883", host_ip);
-#else
-  data.url = strdup(MQTTS_URL);
-#endif
-#else
-#ifdef MQTT_LOCALHOST
-  data.url = mg_mprintf("mqtt://%s:1883", host_ip);
-#else
-  data.url = strdup(MQTT_URL);
-#endif
-#endif
-  s_conn = mg_mqtt_connect(mgr, data.url, &opts, mqtt_fn, &data);
-  ASSERT(s_conn != NULL);
-  for (int i = 0; i < 1000 && s_conn != NULL && !s_conn->is_closing; i++) {
-    mg_mgr_poll(mgr, 0);
-    usleep(10000);  // 10 ms. Slow down poll loop to ensure packets transit
-  }
-  ASSERT(data.passed);
-  mg_mgr_poll(mgr, 0);
-  free(data.url);
-}
-
-#include <pthread.h>
-static void *poll_thread(void *p) {
-  struct mg_mgr *mgr = (struct mg_mgr *) p;
-  int i;
-  for (i = 0; i < 300; i++) {
-    mg_mgr_poll(mgr, 0);
-    usleep(10000);  // 10 ms. Slow down poll loop to ensure packet transit
-  }
-  return NULL;
-}
-
-static void test_http_server(struct mg_mgr *mgr) {
-  struct mg_connection *c;
-  char *cmd;
-  pthread_t thread_id = (pthread_t) 0;
-#if MG_TLS
-  struct mg_tls_opts opts;
-  memset(&opts, 0, sizeof(opts));
-  // opts.ca = mg_str(s_tls_ca);
-  opts.cert = mg_unpacked("/certs/server.crt");
-  opts.key = mg_unpacked("/certs/server.key");
-  c = mg_http_listen(mgr, "https://0.0.0.0:12347", eh1, &opts);
-  cmd = mg_mprintf("./mip_curl.sh --insecure https://%M:12347", mg_print_ip4,
-                   &mgr->ifp->ip);
-#else
-  c = mg_http_listen(mgr, "http://0.0.0.0:12347", eh1, NULL);
-  cmd =
-      mg_mprintf("./mip_curl.sh http://%M:12347", mg_print_ip4, &mgr->ifp->ip);
-#endif
-  ASSERT(c != NULL);
-  pthread_create(&thread_id, NULL, poll_thread,
-                 mgr);  // simpler this way, no concurrency anyway
-  MG_DEBUG(("CURL"));
-  ASSERT(system(cmd) == 0);  // wait for curl
-  MG_DEBUG(("MONGOOSE"));
-  pthread_join(thread_id, NULL);  // wait for Mongoose
-  MG_DEBUG(("DONE"));
-  free(cmd);
-}
-
-static void test_tls(struct mg_mgr *mgr) {
-#if MG_TLS
-  char *url;
-  char buf[FETCH_BUF_SIZE];  // make sure it can hold Makefile
-  struct mg_str data = mg_unpacked("/Makefile");
-  if (host_ip == NULL) {
-    printf("\nNo HOST_IP provided, skipping TLS tests\n");
-    return;
-  }
-  printf("HOST_IP: %s\n", host_ip);
-  // - POST a large file, make sure we drain TLS buffers and read all: done at
-  // server test, using curl as POSTing client
-  // - Fire patched server, test multiple TLS records per TCP segment handling
-  url = mg_mprintf("https://%s:8443", host_ip);  // for historic reasons
-  ASSERT(system("tls_multirec/server -d tls_multirec &") == 0);
-  sleep(1);
-  ASSERT(fetch(mgr, buf, url, "GET /thefile HTTP/1.0\n\n") == 200);
-  ASSERT(cmpbody(buf, data.buf) == 0);  // "thefile" links to Makefile
-  ASSERT(system("killall tls_multirec/server") == 0);
-  free(url);
-#else
-  (void) cmpbody("", "");
-  (void) mgr;
-#endif
-}
 
 int main(void) {
+  bool result;
   const char *debug_level = getenv("V");
   // Setup interface
   const char *iface = "tap0";             // Network iface
@@ -476,9 +72,6 @@ int main(void) {
   if (debug_level == NULL) debug_level = "3";
   mg_log_set(atoi(debug_level));
 
-  host_ip = getenv("HOST_IP");
-
-  // Events
   struct mg_mgr mgr;  // Event manager
   mg_mgr_init(&mgr);  // Initialise event manager
 
@@ -532,21 +125,8 @@ int main(void) {
   }
 
   // RUN TESTS
-  usleep(500000);  // 500 ms
+  result = mip_x_test(&mgr);
-  test_http_client(&mgr);
-  usleep(500000);  // 500 ms
-  test_http_server(&mgr);
-  usleep(500000);  // 500 ms
-  test_tls(&mgr);
-  usleep(500000);  // 500 ms
-  test_mqtt_connsubpub(&mgr);
-  usleep(500000);  // 500 ms
-
-  printf("SUCCESS. Total tests: %d\n", s_num_tests);
-
-  // Clear
-  mg_mgr_free(&mgr);
-  ASSERT(mgr.conns == NULL);  // Deconstruction OK
   close(fd);
-  return 0;
+  if (!result) return EXIT_FAILURE;
+  return EXIT_SUCCESS;
 }

test/mip_x_test.c

@@ -0,0 +1,468 @@
+#define MG_ENABLE_TCPIP 1
+#define MG_ENABLE_TCPIP_DRIVER_INIT 0
+
+#define FETCH_BUF_SIZE (16 * 1024)
+
+#include "mongoose.c"
+
+bool mip_x_test(struct mg_mgr *);
+
+
+#ifdef MQTT_LOCALHOST
+#define MQTT_URL "mqtt://127.0.0.1:1883"
+#else
+#define MQTT_URL "mqtt://broker.hivemq.com:1883"
+#endif
+#if MG_TLS == MG_TLS_BUILTIN
+#define MQTTS_URL "mqtts://mongoose.ws:8883"  // test requires TLS 1.3
+#define MQTTS_CA mg_str(s_ca_cert)
+static const char *s_ca_cert =
+    "-----BEGIN CERTIFICATE-----\n"
+    "MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw\n"
+    "TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh\n"
+    "cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTUwNjA0MTEwNDM4\n"
+    "WhcNMzUwNjA0MTEwNDM4WjBPMQswCQYDVQQGEwJVUzEpMCcGA1UEChMgSW50ZXJu\n"
+    "ZXQgU2VjdXJpdHkgUmVzZWFyY2ggR3JvdXAxFTATBgNVBAMTDElTUkcgUm9vdCBY\n"
+    "MTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAK3oJHP0FDfzm54rVygc\n"
+    "h77ct984kIxuPOZXoHj3dcKi/vVqbvYATyjb3miGbESTtrFj/RQSa78f0uoxmyF+\n"
+    "0TM8ukj13Xnfs7j/EvEhmkvBioZxaUpmZmyPfjxwv60pIgbz5MDmgK7iS4+3mX6U\n"
+    "A5/TR5d8mUgjU+g4rk8Kb4Mu0UlXjIB0ttov0DiNewNwIRt18jA8+o+u3dpjq+sW\n"
+    "T8KOEUt+zwvo/7V3LvSye0rgTBIlDHCNAymg4VMk7BPZ7hm/ELNKjD+Jo2FR3qyH\n"
+    "B5T0Y3HsLuJvW5iB4YlcNHlsdu87kGJ55tukmi8mxdAQ4Q7e2RCOFvu396j3x+UC\n"
+    "B5iPNgiV5+I3lg02dZ77DnKxHZu8A/lJBdiB3QW0KtZB6awBdpUKD9jf1b0SHzUv\n"
+    "KBds0pjBqAlkd25HN7rOrFleaJ1/ctaJxQZBKT5ZPt0m9STJEadao0xAH0ahmbWn\n"
+    "OlFuhjuefXKnEgV4We0+UXgVCwOPjdAvBbI+e0ocS3MFEvzG6uBQE3xDk3SzynTn\n"
+    "jh8BCNAw1FtxNrQHusEwMFxIt4I7mKZ9YIqioymCzLq9gwQbooMDQaHWBfEbwrbw\n"
+    "qHyGO0aoSCqI3Haadr8faqU9GY/rOPNk3sgrDQoo//fb4hVC1CLQJ13hef4Y53CI\n"
+    "rU7m2Ys6xt0nUW7/vGT1M0NPAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNV\n"
+    "HRMBAf8EBTADAQH/MB0GA1UdDgQWBBR5tFnme7bl5AFzgAiIyBpY9umbbjANBgkq\n"
+    "hkiG9w0BAQsFAAOCAgEAVR9YqbyyqFDQDLHYGmkgJykIrGF1XIpu+ILlaS/V9lZL\n"
+    "ubhzEFnTIZd+50xx+7LSYK05qAvqFyFWhfFQDlnrzuBZ6brJFe+GnY+EgPbk6ZGQ\n"
+    "3BebYhtF8GaV0nxvwuo77x/Py9auJ/GpsMiu/X1+mvoiBOv/2X/qkSsisRcOj/KK\n"
+    "NFtY2PwByVS5uCbMiogziUwthDyC3+6WVwW6LLv3xLfHTjuCvjHIInNzktHCgKQ5\n"
+    "ORAzI4JMPJ+GslWYHb4phowim57iaztXOoJwTdwJx4nLCgdNbOhdjsnvzqvHu7Ur\n"
+    "TkXWStAmzOVyyghqpZXjFaH3pO3JLF+l+/+sKAIuvtd7u+Nxe5AW0wdeRlN8NwdC\n"
+    "jNPElpzVmbUq4JUagEiuTDkHzsxHpFKVK7q4+63SM1N95R1NbdWhscdCb+ZAJzVc\n"
+    "oyi3B43njTOQ5yOf+1CceWxG1bQVs5ZufpsMljq4Ui0/1lvh+wjChP4kqKOJ2qxq\n"
+    "4RgqsahDYVvTH9w7jXbyLeiNdd8XM2w9U/t7y0Ff/9yi0GE44Za4rF2LN9d11TPA\n"
+    "mRGunUHBcnWEvgJBQl9nJEiU0Zsnvgc/ubhPgXRR4Xq37Z0j4r7g1SgEEzwxA57d\n"
+    "emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc=\n"
+    "-----END CERTIFICATE-----\n";
+#elif MG_TLS
+#ifdef MQTT_LOCALHOST
+// we'll generate MQTTS_URL
+#define MQTTS_CA mg_str(s_ca_cert)
+static const char *s_ca_cert =
+    "-----BEGIN CERTIFICATE-----\n"
+    "MIIBFTCBvAIJAMNTFtpfcq8NMAoGCCqGSM49BAMCMBMxETAPBgNVBAMMCE1vbmdv\n"
+    "b3NlMB4XDTI0MDUwNzE0MzczNloXDTM0MDUwNTE0MzczNlowEzERMA8GA1UEAwwI\n"
+    "TW9uZ29vc2UwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAASuP+86T/rOWnGpEVhl\n"
+    "fxYZ+pjMbCmDZ+vdnP0rjoxudwRMRQCv5slRlDK7Lxue761sdvqxWr0Ma6TFGTNg\n"
+    "epsRMAoGCCqGSM49BAMCA0gAMEUCIQCwb2CxuAKm51s81S6BIoy1IcandXSohnqs\n"
+    "us64BAA7QgIgGGtUrpkgFSS0oPBlCUG6YPHFVw42vTfpTC0ySwAS0M4=\n"
+    "-----END CERTIFICATE-----\n";
+#else
+#define MQTTS_URL "mqtts://broker.hivemq.com:8883"
+#define MQTTS_CA mg_unpacked("/data/ca.pem")
+#endif // MQTT_LOCALHOST
+#endif
+
+static char *host_ip;
+
+static int s_num_tests = 0;
+static bool s_error = false;
+
+#ifdef NO_ABORT
+static int s_abort = 0;
+#define ABORT() ++s_abort, s_error = true
+#else
+#ifdef NO_SLEEP_ABORT
+#define ABORT() abort()
+#else
+#define ABORT()                       \
+  sleep(2); /* 2s, GH print reason */ \
+  abort();
+#endif
+#endif
+
+#define ASSERT(expr)                                            \
+  do {                                                          \
+    s_num_tests++;                                              \
+    if (!(expr)) {                                              \
+      printf("FAILURE %s:%d: %s\n", __FILE__, __LINE__, #expr); \
+      fflush(stdout);                                           \
+      ABORT();                                                  \
+    }                                                           \
+  } while (0)
+
+
+static struct mg_http_message gethm(const char *buf) {
+  struct mg_http_message hm;
+  memset(&hm, 0, sizeof(hm));
+  mg_http_parse(buf, strlen(buf), &hm);
+  return hm;
+}
+
+static int cmpbody(const char *buf, const char *str) {
+  struct mg_str s = mg_str(str);
+  struct mg_http_message hm = gethm(buf);
+  size_t len = strlen(buf);
+  if (hm.body.len > len) hm.body.len = len - (size_t) (hm.body.buf - buf);
+  return mg_strcmp(hm.body, s);
+}
+
+#ifndef NO_HTTPSERVER_TEST
+static void eh1(struct mg_connection *c, int ev, void *ev_data) {
+  struct mg_tls_opts *topts = (struct mg_tls_opts *) c->fn_data;
+  if (ev == MG_EV_ACCEPT && topts != NULL) mg_tls_init(c, topts);
+  if (ev == MG_EV_HTTP_MSG) {
+    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    MG_DEBUG(("[%.*s %.*s] message len %d", (int) hm->method.len,
+              hm->method.buf, (int) hm->uri.len, hm->uri.buf,
+              (int) hm->message.len));
+    if (mg_match(hm->uri, mg_str("/foo/*"), NULL)) {
+      mg_http_reply(c, 200, "", "uri: %.*s", hm->uri.len - 5, hm->uri.buf + 5);
+    } else if (mg_match(hm->uri, mg_str("/ws"), NULL)) {
+      mg_ws_upgrade(c, hm, NULL);
+    } else if (mg_match(hm->uri, mg_str("/body"), NULL)) {
+      mg_http_reply(c, 200, "", "%.*s", (int) hm->body.len, hm->body.buf);
+    } else {
+      struct mg_http_serve_opts sopts;
+      memset(&sopts, 0, sizeof(sopts));
+      sopts.root_dir = "./data";
+      mg_http_serve_dir(c, hm, &sopts);
+    }
+  } else if (ev == MG_EV_WS_OPEN) {
+    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    ASSERT(mg_strcmp(hm->uri, mg_str("/ws")) == 0);
+    mg_ws_send(c, "opened", 6, WEBSOCKET_OP_BINARY);
+  } else if (ev == MG_EV_WS_MSG) {
+    struct mg_ws_message *wm = (struct mg_ws_message *) ev_data;
+    mg_ws_send(c, wm->data.buf, wm->data.len, WEBSOCKET_OP_BINARY);
+  }
+}
+#endif
+
+struct fetch_data {
+  char *buf;
+  const char *url;
+  int code, closed;
+};
+
+static void fcb(struct mg_connection *c, int ev, void *ev_data) {
+  struct fetch_data *fd = (struct fetch_data *) c->fn_data;
+  if (ev == MG_EV_CONNECT) {
+    MG_DEBUG(("CONNECT"));
+    if (mg_url_is_ssl(fd->url)) {
+      struct mg_tls_opts opts;
+      memset(&opts, 0, sizeof(opts));  // read CA from packed_fs
+      if (host_ip != NULL && strstr(fd->url, host_ip) != NULL) {
+        MG_DEBUG(("Local connection, using self-signed certificates"));
+        opts.name = mg_str_s("localhost");
+        opts.ca = mg_unpacked("/certs/ca.crt");
+      } else {
+        opts.name = mg_url_host(fd->url);
+        opts.ca = mg_unpacked("/data/ca.pem");
+#if MG_TLS == MG_TLS_BUILTIN
+        // our TLS does not search for the proper CA in a bundle
+        opts.ca = mg_file_read(&mg_fs_posix, "data/e5.crt");
+#endif
+      }
+      mg_tls_init(c, &opts);
+#if MG_TLS == MG_TLS_BUILTIN
+      mg_free((void *) opts.ca.buf);
+#endif
+    }
+  } else if (ev == MG_EV_HTTP_MSG) {
+    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    snprintf(fd->buf, FETCH_BUF_SIZE, "%.*s", (int) hm->message.len,
+             hm->message.buf);
+    fd->code = atoi(hm->uri.buf);
+    fd->closed = 1;
+    c->is_closing = 1;
+    MG_DEBUG(("CODE: %d, MSG: %.*s", fd->code, (int) hm->message.len,
+              hm->message.buf));
+    (void) c;
+  } else if (ev == MG_EV_CLOSE) {
+    MG_DEBUG(("CLOSE"));
+    fd->closed = 1;
+  } else if (ev == MG_EV_READ) {
+    long bytes = *(long *) ev_data;
+    MG_DEBUG(("READ %d: %.*s", (int) bytes, (int) bytes, c->recv.buf));
+  }
+}
+
+static int fetch(struct mg_mgr *mgr, char *buf, const char *url,
+                 const char *fmt, ...) {
+  struct fetch_data fd = {buf, url, 0, 0};
+  int i;
+  struct mg_connection *c = NULL;
+  va_list ap;
+  mg_mgr_poll(mgr, 0);  // update ifp->now to avoid ARP lookup using an old
+                        // timestamp (from an ancient call in other test)
+  c = mg_http_connect(mgr, url, fcb, &fd);
+  ASSERT(c != NULL);
+  va_start(ap, fmt);
+  mg_vprintf(c, fmt, &ap);
+  va_end(ap);
+  buf[0] = '\0';
+  // - TLS: multiple (small) records: allow enough loops so mg_mgr_poll can
+  // process buffered records when no more frames are coming in
+  for (i = 0; i < 500 && buf[0] == '\0' && !fd.closed; i++) {
+    mg_mgr_poll(mgr, 0);
+    usleep(5000);  // 5 ms. Slow down poll loop to ensure packet transit, but
+                   // allow enough loops to get the ARP response, otherwise,
+                   // given enough traffic, the timer expires before we get a
+                   // chance to see the response
+  }
+  if (!fd.closed) c->is_closing = 1;
+  mg_mgr_poll(mgr, 0);
+  return fd.code;
+}
+
+static void test_http_client(struct mg_mgr *mgr) {
+  char buf[FETCH_BUF_SIZE];
+  int rc = 0;
+  const bool ipv6 = MG_ENABLE_IPV6;
+#if MG_TLS
+  if (ipv6) {
+    rc = fetch(mgr, buf, "https://ipv6.google.com",
+               "GET / HTTP/1.0\r\nHost: ipv6.google.com\r\n\r\n");
+  } else {
+    rc = fetch(mgr, buf, "https://cesanta.com",
+               "GET /robots.txt HTTP/1.0\r\nHost: cesanta.com\r\n\r\n");
+  }
+  ASSERT(rc == 200);  // OK
+#else
+  if (ipv6) {
+    rc = fetch(mgr, buf, "http://ipv6.google.com",
+               "GET / HTTP/1.0\r\nHost: ipv6.google.com\r\n\r\n");
+    ASSERT(rc == 200);  // OK
+  } else {
+    rc = fetch(mgr, buf, "http://cesanta.com",
+               "GET /robots.txt HTTP/1.0\r\nHost: cesanta.com\r\n\r\n");
+    ASSERT(rc == 301);  // OK: Permanently moved (HTTP->HTTPS redirect)
+  }
+
+#endif
+}
+
+static struct mg_connection *s_conn;
+static char s_topic[16];
+
+struct mqtt_data {
+  char *url;
+  bool passed;
+};
+
+static void mqtt_fn(struct mg_connection *c, int ev, void *ev_data) {
+  struct mqtt_data *data = (struct mqtt_data *) c->fn_data;
+  if (ev == MG_EV_CONNECT) {
+    MG_DEBUG(("CONNECT"));
+#if MG_TLS
+    struct mg_tls_opts opts;
+    memset(&opts, 0, sizeof(opts));
+    opts.ca = MQTTS_CA;
+    opts.name = mg_url_host(data->url);
+    mg_tls_init(c, &opts);
+#endif
+  } else if (ev == MG_EV_MQTT_OPEN) {
+    MG_DEBUG(("MQTT CONNECT"));
+    struct mg_mqtt_opts sub_opts;
+    memset(&sub_opts, 0, sizeof(sub_opts));
+    sub_opts.topic = mg_str(mg_random_str(s_topic, sizeof(s_topic)));
+    sub_opts.qos = 1;
+    mg_mqtt_sub(c, &sub_opts);
+    struct mg_mqtt_opts pub_opts;
+    memset(&pub_opts, 0, sizeof(pub_opts));
+    pub_opts.topic = sub_opts.topic;
+    pub_opts.message = mg_str("hi");
+    pub_opts.qos = 1, pub_opts.retain = false;
+    mg_mqtt_pub(c, &pub_opts);
+  } else if (ev == MG_EV_MQTT_MSG) {
+    struct mg_mqtt_message *mm = (struct mg_mqtt_message *) ev_data;
+    MG_DEBUG(("TOPIC: %.*s, MSG: %.*s", (int) mm->topic.len, mm->topic.buf,
+              mm->data.len > 10 ? 10 : (int) mm->data.len, mm->data.buf));
+    ASSERT(mm->topic.len == strlen(s_topic) &&
+           strncmp(mm->topic.buf, s_topic, mm->topic.len) == 0);
+    if (mm->data.len == 2 && strncmp(mm->data.buf, "hi", 2) == 0) {
+      struct mg_mqtt_opts pub_opts;
+      memset(&pub_opts, 0, sizeof(pub_opts));
+      pub_opts.topic = mm->topic;
+      // send more than 1 record, content is not relevant
+      pub_opts.message = mg_str_n((char *)(size_t) mqtt_fn, 21098);
+      pub_opts.qos = 1, pub_opts.retain = false;
+      mg_mqtt_pub(c, &pub_opts);
+    } else if (mm->data.len == 8 && strncmp(mm->data.buf, "farewell", 8) == 0) {
+      // close on farewell
+      MG_INFO(("%lu CLOSING", c->id));
+      mg_mqtt_disconnect(c, NULL);
+      data->passed = true;
+    } else if (mm->data.len == 21098) {
+      struct mg_mqtt_opts pub_opts;
+      ASSERT(memcmp((const char *) (size_t) mqtt_fn, mm->data.buf, 21098) == 0);
+      // send farewell after receiving big data
+      memset(&pub_opts, 0, sizeof(pub_opts));
+      pub_opts.topic = mm->topic;
+      pub_opts.message = mg_str("farewell");
+      pub_opts.qos = 1, pub_opts.retain = false;
+      mg_mqtt_pub(c, &pub_opts);
+    }
+  } else if (ev == MG_EV_CLOSE) {
+    MG_DEBUG(("CLOSE"));
+    s_conn = NULL;
+  } else if (ev == MG_EV_ERROR) {
+    MG_ERROR(("%lu ERROR %s", c->id, (char *) ev_data));
+  }
+}
+
+static void test_mqtt_connsubpub(struct mg_mgr *mgr) {
+  struct mqtt_data data;
+  struct mg_mqtt_opts opts;
+  memset(&opts, 0, sizeof(opts));
+  opts.clean = true, opts.version = 4;
+  data.passed = false;
+#if defined(MQTT_LOCALHOST) && MG_TLS != MG_TLS_BUILTIN
+  if (host_ip == NULL) {
+    printf("\nMQTT_LOCALHOST defined but no HOST_IP provided, skipping MQTTS tests\n");
+    return;
+  }
+  printf("HOST_IP: %s\n", host_ip);
+#endif
+#if MG_TLS
+#if defined(MQTT_LOCALHOST) && MG_TLS != MG_TLS_BUILTIN
+  data.url = mg_mprintf("mqtts://%s:8883", host_ip);
+#else
+  data.url = strdup(MQTTS_URL);
+#endif
+#else
+#ifdef MQTT_LOCALHOST
+  data.url = mg_mprintf("mqtt://%s:1883", host_ip);
+#else
+  data.url = strdup(MQTT_URL);
+#endif
+#endif
+  s_conn = mg_mqtt_connect(mgr, data.url, &opts, mqtt_fn, &data);
+  ASSERT(s_conn != NULL);
+  for (int i = 0; i < 1000 && s_conn != NULL && !s_conn->is_closing; i++) {
+    mg_mgr_poll(mgr, 0);
+    usleep(10000);  // 10 ms. Slow down poll loop to ensure packets transit
+  }
+  ASSERT(data.passed);
+  mg_mgr_poll(mgr, 0);
+  free(data.url);
+}
+
+#ifndef NO_HTTPSERVER_TEST
+#include <pthread.h>
+static void *poll_thread(void *p) {
+  struct mg_mgr *mgr = (struct mg_mgr *) p;
+  int i;
+  for (i = 0; i < 300; i++) {
+    mg_mgr_poll(mgr, 0);
+    usleep(10000);  // 10 ms. Slow down poll loop to ensure packet transit
+  }
+  return NULL;
+}
+#endif
+
+static void test_http_server(struct mg_mgr *mgr) {
+#ifdef NO_HTTPSERVER_TEST
+  (void) mgr;
+#else
+  struct mg_connection *c;
+  char *cmd;
+  pthread_t thread_id = (pthread_t) 0;
+#if MG_TLS
+  struct mg_tls_opts opts;
+  memset(&opts, 0, sizeof(opts));
+  // opts.ca = mg_str(s_tls_ca);
+  opts.cert = mg_unpacked("/certs/server.crt");
+  opts.key = mg_unpacked("/certs/server.key");
+  c = mg_http_listen(mgr, "https://0.0.0.0:12347", eh1, &opts);
+  cmd = mg_mprintf("./mip_curl.sh --insecure https://%M:12347", mg_print_ip4,
+                   &mgr->ifp->ip);
+#else
+  c = mg_http_listen(mgr, "http://0.0.0.0:12347", eh1, NULL);
+  cmd =
+      mg_mprintf("./mip_curl.sh http://%M:12347", mg_print_ip4, &mgr->ifp->ip);
+#endif
+  ASSERT(c != NULL);
+  ASSERT (mg_send(c, "NADA", 0)); // check mg_send allows len=0
+  pthread_create(&thread_id, NULL, poll_thread,
+                 mgr);  // simpler this way, no concurrency anyway
+  MG_DEBUG(("CURL"));
+  ASSERT(system(cmd) == 0);  // wait for curl
+  MG_DEBUG(("MONGOOSE"));
+  pthread_join(thread_id, NULL);  // wait for Mongoose
+  MG_DEBUG(("DONE"));
+  free(cmd);
+#endif
+}
+
+static void test_tls(struct mg_mgr *mgr) {
+#if MG_TLS
+  char *url;
+  char buf[FETCH_BUF_SIZE];  // make sure it can hold Makefile
+  struct mg_str data = mg_unpacked("/Makefile");
+  if (host_ip == NULL) {
+    printf("\nNo HOST_IP provided, skipping TLS tests\n");
+    return;
+  }
+  printf("HOST_IP: %s\n", host_ip);
+  // - POST a large file, make sure we drain TLS buffers and read all: done at
+  // server test, using curl as POSTing client
+  // - Fire patched server, test multiple TLS records per TCP segment handling
+  url = mg_mprintf("https://%s:8443", host_ip);  // for historic reasons
+  ASSERT(system("tls_multirec/server -d tls_multirec &") == 0);
+  sleep(1);
+  ASSERT(fetch(mgr, buf, url, "GET /thefile HTTP/1.0\n\n") == 200);
+  ASSERT(cmpbody(buf, data.buf) == 0);  // "thefile" links to Makefile
+  ASSERT(system("killall tls_multirec/server") == 0);
+  free(url);
+#else
+  (void) cmpbody("", "");
+  (void) mgr;
+#endif
+}
+
+bool mip_x_test(struct mg_mgr *mgr) {
+
+  host_ip = getenv("HOST_IP");
+
+#define DASHBOARD(x)  printf("HEALTH_DASHBOARD\t\"%s\": %s,\n", x, s_error ? "false":"true");
+
+  usleep(500000);  // 500 ms
+  s_error = false;
+  test_http_client(mgr);
+  DASHBOARD("http_client");
+
+  usleep(500000);  // 500 ms
+  s_error = false;
+  test_http_server(mgr);
+  DASHBOARD("http_server");
+
+  usleep(500000);  // 500 ms
+  s_error = false;
+  test_tls(mgr);
+  DASHBOARD("tls");
+
+  usleep(500000);  // 500 ms
+  s_error = false;
+  test_mqtt_connsubpub(mgr);
+  DASHBOARD("mqtt");
+
+  // Clear
+  s_error = false;
+  mg_mgr_free(mgr);
+  ASSERT(mgr->conns == NULL);  // Deconstruction OK
+  printf("HEALTH_DASHBOARD\t\"cleanup\": %s\n", s_error ? "false":"true");
+ // last entry with no comma
+
+#ifdef NO_ABORT
+  if (s_abort != 0) return false;
+#endif
+
+  printf("SUCCESS. Total tests: %d\n", s_num_tests);
+  return true;
+}

test/port_tap_bridge.c

@@ -0,0 +1,105 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/poll.h>
+
+#ifndef __OpenBSD__
+#include <linux/if.h>
+#include <linux/if_tun.h>
+#else
+#include <net/if.h>
+#include <net/if_tun.h>
+#include <net/if_types.h>
+#endif
+
+static int s_signo;
+void signal_handler(int signo) {
+  s_signo = signo;
+}
+
+int main(void) {
+  // Setup interface
+  const char *iface = "tap0";             // Network iface
+  const uint16_t port = 0x55AA;           // UDP port
+#ifndef __OpenBSD__
+  const char *tuntap_device = "/dev/net/tun";
+#else
+  const char *tuntap_device = "/dev/tap0";
+#endif
+  int fd = open(tuntap_device, O_RDWR);
+  struct ifreq ifr;
+  memset(&ifr, 0, sizeof(ifr));
+  strncpy(ifr.ifr_name, iface, IFNAMSIZ);
+#ifndef __OpenBSD__
+  ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
+  if (ioctl(fd, TUNSETIFF, (void *) &ifr) < 0) {
+#else
+  ifr.ifr_flags = (short) (IFF_UP | IFF_BROADCAST | IFF_MULTICAST);
+  if (ioctl(fd, TUNSIFMODE, (void *) &ifr) < 0) {
+#endif
+    printf("Failed to setup TAP interface: %s", ifr.ifr_name);
+    return EXIT_FAILURE;
+  }
+  printf("Opened TAP interface: %s\n", iface);
+
+  int sockfd;
+  struct sockaddr_in tap_addr, port_addr;
+
+	sockfd = socket(AF_INET, SOCK_DGRAM, 0); 
+	tap_addr.sin_family = AF_INET;
+	tap_addr.sin_addr.s_addr = htonl(0x7f000001U);  // 127.0.0.1
+	tap_addr.sin_port = htons(port);
+	if (bind(sockfd, (struct sockaddr *) &tap_addr, sizeof(tap_addr)) < 0) return EXIT_FAILURE; 
+  printf("Opened UDP socket: 127.0.0.1:%u (0x%04x)\n", port, port);
+
+  memset(&port_addr, 0, sizeof(port_addr));
+
+  while (s_signo == 0) {
+    struct pollfd pfd[2];
+		int result;
+		do {
+			pfd[0].fd = fd;
+			pfd[0].events = POLLIN | POLLPRI;		// will wait for input available (read ready), use POLLOUT for write
+			pfd[1].fd = sockfd;
+			pfd[1].events = POLLIN | POLLPRI;		// will wait for input available (read ready), use POLLOUT for write
+			
+			// only read ready shown here, for write ready use the 3rd arg, and the 4th for exceptions
+			result = poll(pfd, 2, 1000);		// 2 pfd, TIMEOUT in milliseconds
+			switch(result) {
+			case -1: 	// error
+				break;
+			case 0: 	// timeout (if a timeout struct was passed to select)
+				break;
+			default: 	// the number of fd/sockets with data available (see pfd.revents for each one);
+        uint8_t buf[1540];
+        if (pfd[0].revents & (POLLIN | POLLPRI)) {
+          ssize_t nread = read(fd, buf, 1540);
+//        printf("Got at TAP: %d bytes\n", (int) nread);
+          if (port_addr.sin_family != 0) { // something has been written to this struct (we got a conterpart)
+    				sendto(sockfd, buf, (size_t) nread, 0, (struct sockaddr *) &port_addr, sizeof(port_addr)); 
+//  				printf("Sent to %s port %d\n", inet_ntoa(port_addr.sin_addr), ntohs(port_addr.sin_port));
+          }
+        }
+        if (pfd[1].revents & (POLLIN | POLLPRI)) {
+  				socklen_t len = sizeof(port_addr);
+  				ssize_t nread = recvfrom(sockfd, buf, 1540, 0, (struct sockaddr *) &port_addr, &len); 
+//        printf("Got at UDP: %d bytes from %s port %d\n", nread, inet_ntoa(port_addr.sin_addr), ntohs(port_addr.sin_port));
+  				write(fd, buf, (size_t) nread);
+// 				printf("Sent to TAP\n");
+        }
+				break;
+			}
+		} while (result >= 0);
+    printf("looks like we got an error here... should I quit ? Waiting for CTRL-C\n");
+	} 
+  close(sockfd);
+  close(fd);
+}

test/tls_multirec/Makefile

@@ -6,4 +6,4 @@ server: main.c patched_mongoose.c mongoose.h Makefile
 	$(CC) main.c patched_mongoose.c $(CFLAGS) $(CFLAGS_MONGOOSE) $(CFLAGS_EXTRA) -o $@
 
 clean:
-	rm -f server
+	rm -rf server *.exe *.o *.dSYM

test/unit_test.c

@@ -4,7 +4,12 @@
 #include "math.h"
 
 static int s_num_tests = 0;
+static bool s_error = false;
 
+#ifdef NO_ABORT
+static int s_abort = 0;
+#define ABORT() ++s_abort, s_error = true
+#else
 #ifdef NO_SLEEP_ABORT
 #define ABORT() abort()
 #else
@@ -12,6 +17,7 @@ static int s_num_tests = 0;
   sleep(2); /* 2s, GH print reason */ \
   abort();
 #endif
+#endif
 
 #define ASSERT(expr)                                            \
   do {                                                          \
@@ -66,6 +72,13 @@ static void test_match(void) {
   ASSERT(mg_match(mg_str_n("caabxa", 6), mg_str_n("#aa#bb#", 7), NULL) == 0);
   ASSERT(mg_match(mg_str_n("a__b_c", 6), mg_str_n("a*b*c", 5), NULL) == 1);
 
+  {
+    char *ae_value = (char *) malloc(1);  // Exact size for ASAN
+    ae_value[0] = 'g';
+    mg_match(mg_str_n(ae_value, 1), mg_str("*gzip*"), NULL);  // Check for OOB
+    free(ae_value);
+  }
+
   {
     struct mg_str caps[3];
     ASSERT(mg_match(mg_str("//a.c"), mg_str("#.c"), NULL) == true);
@@ -316,6 +329,8 @@ static void test_iobuf(void) {
   mg_iobuf_add(&io, io.len, "a", 1);
   ASSERT(io.buf != NULL && io.size == 20 && io.len == 11);
   ASSERT(memcmp(io.buf, "xhi!123456a", io.len) == 0);
+  mg_iobuf_resize(&io, 1);
+  ASSERT(io.buf != NULL && io.size == 10 && io.len == 10);
   mg_iobuf_free(&io);
 }
 
@@ -431,7 +446,7 @@ static const char *s_ca_cert =
 #else
 #define MQTTS_URL "mqtts://broker.hivemq.com:8883"
 #define MQTTS_CA mg_unpacked("/data/ca.pem")
-#endif // MQTT_LOCALHOST
+#endif  // MQTT_LOCALHOST
 #endif
 
 struct mqtt_data {
@@ -446,6 +461,7 @@ struct mqtt_data {
 #define flags_received (1 << 2)
 #define flags_released (1 << 3)
 #define flags_completed (1 << 4)
+#define flags_unsubscribed (1 << 5)
 
 static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data) {
   struct mqtt_data *test_data = (struct mqtt_data *) c->fn_data;
@@ -455,7 +471,7 @@ static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data) {
     struct mg_tls_opts opts;
     memset(&opts, 0, sizeof(opts));
     opts.ca = MQTTS_CA;
-#if defined( MQTT_LOCALHOST) && MG_TLS != MG_TLS_BUILTIN
+#if defined(MQTT_LOCALHOST) && MG_TLS != MG_TLS_BUILTIN
     MG_ERROR(("Hostname not tested"));
 #else
     opts.name = mg_url_host(MQTTS_URL);
@@ -479,6 +495,8 @@ static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data) {
       test_data->flags |= flags_released;
     } else if (mm->cmd == MQTT_CMD_PUBCOMP) {
       test_data->flags |= flags_completed;
+    } else if (mm->cmd == MQTT_CMD_UNSUBACK) {
+      test_data->flags = flags_unsubscribed;
     }
   } else if (ev == MG_EV_MQTT_MSG) {
     struct mg_mqtt_message *mm = (struct mg_mqtt_message *) ev_data;
@@ -491,7 +509,7 @@ static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data) {
       size_t pos = 0, i = 0, j = 0;
       struct mg_mqtt_prop prop;
 
-      for (i = 0; i < 5 ; i++) {
+      for (i = 0; i < 5; i++) {
         ASSERT((pos = mg_mqtt_next_prop(mm, &prop, pos)) > 0);
         if (prop.id == MQTT_PROP_MESSAGE_EXPIRY_INTERVAL) {
           ASSERT(prop.iv == 10);
@@ -500,14 +518,20 @@ static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data) {
           j += 2;
           continue;
         } else if (prop.id == MQTT_PROP_CONTENT_TYPE) {
-          ASSERT(strncmp(prop.val.buf, "test_content_val_2", prop.val.len) == 0 && prop.val.len == strlen("test_content_val_2"));
+          ASSERT(strncmp(prop.val.buf, "test_content_val_2", prop.val.len) ==
+                     0 &&
+                 prop.val.len == strlen("test_content_val_2"));
           j += 4;
         } else if (prop.id == MQTT_PROP_USER_PROPERTY) {
-          if (strncmp(prop.key.buf, "test_key_1", prop.key.len) == 0 && prop.key.len == strlen("test_key_1")) {
+          if (strncmp(prop.key.buf, "test_key_1", prop.key.len) == 0 &&
-            ASSERT(strncmp(prop.val.buf, "test_value_1", prop.val.len) == 0 && prop.val.len == strlen("test_value_1"));
+              prop.key.len == strlen("test_key_1")) {
+            ASSERT(strncmp(prop.val.buf, "test_value_1", prop.val.len) == 0 &&
+                   prop.val.len == strlen("test_value_1"));
             j += 8;
-          } else if (strncmp(prop.key.buf, "test_key_2", prop.key.len) == 0 && prop.key.len == strlen("test_key_2")) {
+          } else if (strncmp(prop.key.buf, "test_key_2", prop.key.len) == 0 &&
-            ASSERT(strncmp(prop.val.buf, "test_value_2", prop.val.len) == 0 && prop.val.len == strlen("test_value_2"));
+                     prop.key.len == strlen("test_key_2")) {
+            ASSERT(strncmp(prop.val.buf, "test_value_2", prop.val.len) == 0 &&
+                   prop.val.len == strlen("test_value_2"));
             j += 16;
           } else {
             ASSERT(0);
@@ -751,6 +775,12 @@ static void test_mqtt_ver(uint8_t mqtt_version) {
   memset(mbuf + 1, 0, sizeof(mbuf) - 1);
   test_data.flags = 0;
 
+  opts.props = 0; opts.num_props = 0;
+  mg_mqtt_unsub(c, &opts);
+  for (i = 0; i < 500 && test_data.flags == 0; i++) mg_mgr_poll(&mgr, 10);
+  ASSERT(test_data.flags == flags_unsubscribed);
+  test_data.flags = 0;
+
   // dirty disconnect
   mg_mgr_free(&mgr);
   ASSERT(mgr.conns == NULL);
@@ -867,8 +897,10 @@ static int fetch(struct mg_mgr *mgr, char *buf, const char *url,
     if (strstr(url, "localhost") != NULL) {
       // Local connection, use self-signed certificates
       opts.ca = mg_unpacked("/certs/ca.crt");
-      // opts.cert = mg_str(s_tls_cert);
+      if (strstr(url, "23456") != NULL) {  // hinted from caller
-      // opts.key = mg_str(s_tls_key);
+        opts.cert = mg_unpacked("/certs/client.crt");
+        opts.key = mg_unpacked("/certs/client.key");
+      }
     }
     mg_tls_init(c, &opts);
   }
@@ -1414,7 +1446,6 @@ static void test_tls(void) {
   struct mg_str bd;
   ASSERT(data.buf != NULL && data.len > 0);
   memset(&opts, 0, sizeof(opts));
-  // opts.ca = mg_str(s_tls_ca);
   opts.cert = mg_unpacked("/certs/server.crt");
   opts.key = mg_unpacked("/certs/server.key");
   mg_mgr_init(&mgr);
@@ -1442,7 +1473,7 @@ static void test_tls(void) {
                "%s",
                bd.len, bd.buf) == 200);
   ASSERT(cmpbody(buf, bd.buf) == 0);
-#if MG_TLS == MG_TLS_BUILTIN && defined(__linux__)
+#if MG_TLS == MG_TLS_BUILTIN && defined(__linux__) && MG_ENABLE_CHACHA20  // skip for non-CHACHA tests
   // fire patched server, test multiple TLS records per TCP segment handling
   // skip other TLS stacks to avoid "bad client hello", we are 1.3 only
   if (access("tls_multirec/server", X_OK) == 0) {
@@ -1455,7 +1486,8 @@ static void test_tls(void) {
     ASSERT(cmpbody(buf, data.buf) == 0);  // "thefile" links to Makefile
     ASSERT(system("killall tls_multirec/server") == 0);
   } else {
-    MG_ERROR(("SKIPPED TLS MULTIPLE RECORDS TEST, tls_multirec/server NOT PRESENT"));
+    MG_ERROR(
+        ("SKIPPED TLS MULTIPLE RECORDS TEST, tls_multirec/server NOT PRESENT"));
   }
 #else
   printf(
@@ -1463,6 +1495,20 @@ static void test_tls(void) {
       "is 1.3 only; re-enable when other stacks can be easily configured for "
       "1.3\n");
 #endif
+
+  // Repeat the simplest test with two-way authentication
+  opts.ca = mg_unpacked("/certs/ca.crt");  // configure the server for two-way
+  // make it fail: the client will not use 2-way
+  ASSERT(fetch(&mgr, buf, url, "GET /a.txt HTTP/1.0\n\n") != 200);
+  // make it work
+  mg_mgr_free(&mgr);
+  ASSERT(mgr.conns == NULL);
+  mg_mgr_init(&mgr);
+  url = "https://localhost:23456";  // port # hints the client to use two-way
+  c = mg_http_listen(&mgr, url, eh1, &opts);
+  ASSERT(c != NULL);
+  ASSERT(fetch(&mgr, buf, url, "GET /a.txt HTTP/1.0\n\n") == 200);
+  ASSERT(cmpbody(buf, "hello\n") == 0);
   mg_mgr_free(&mgr);
   ASSERT(mgr.conns == NULL);
 #endif
@@ -1473,7 +1519,8 @@ static void f3(struct mg_connection *c, int ev, void *ev_data) {
   // MG_INFO(("%d", ev));
   if (ev == MG_EV_CONNECT) {
     // c->is_hexdumping = 1;
-    ASSERT((c->loc.ip[0] != 0));  // Make sure that c->loc address is populated
+    ASSERT((c->loc.addr.ip[0] !=
+            0));  // Make sure that c->loc address is populated
     mg_printf(c, "GET /%s HTTP/1.0\r\nHost: %s\r\n\r\n",
               c->rem.is_ip6 ? "" : "/robots.txt",
               c->rem.is_ip6 ? "ipv6.google.com" : "cesanta.com");
@@ -1510,12 +1557,12 @@ static void test_http_client(void) {
   ASSERT(ok == 301 || ok == 200);
   mg_mgr_poll(&mgr, 0);
   ok = 0;
-#if MG_TLS
+#if MG_TLS && MG_TLS != MG_TLS_BUILTIN
   url = "https://cesanta.com";
   opts.name = mg_url_host(url);
 #if MG_TLS == MG_TLS_BUILTIN
   // our TLS does not search for the proper CA in a bundle
-  opts.ca = mg_file_read(&mg_fs_posix, "data/e5.crt");
+  opts.ca = mg_file_read(&mg_fs_posix, "data/e8.crt");
 #endif
   c = mg_http_connect(&mgr, url, f3, &ok);
   ASSERT(c != NULL);
@@ -1525,7 +1572,7 @@ static void test_http_client(void) {
   ASSERT(ok == 200);
   mg_mgr_poll(&mgr, 1);
 
-  // Make host validationfail
+  // Make host validation fail
   c = mg_http_connect(&mgr, url, f3, &ok);
   ASSERT(c != NULL);
   opts.name = mg_str("dummy");  // Set some invalid hostname value
@@ -1535,6 +1582,16 @@ static void test_http_client(void) {
   MG_INFO(("OK: %d", ok));
   ASSERT(ok == 777);
   mg_mgr_poll(&mgr, 1);
+  // Skip host validation
+  c = mg_http_connect(&mgr, url, f3, &ok);
+  ASSERT(c != NULL);
+  opts.name = mg_str("");
+  mg_tls_init(c, &opts);
+  ok = 0;
+  for (i = 0; i < 500 && ok <= 0; i++) mg_mgr_poll(&mgr, 10);
+  MG_INFO(("OK: %d", ok));
+  ASSERT(ok == 200);
+  mg_mgr_poll(&mgr, 1);
   opts.name = mg_url_host(url);
 #if MG_TLS == MG_TLS_BUILTIN
   mg_free((void *) opts.ca.buf);
@@ -1622,14 +1679,12 @@ static void test_http_no_content_length(void) {
   // 12348 is in TIME_WAIT, use another port
   mg_mgr_init(&mgr);
   mg_http_listen(&mgr, url2, f41, (void *) NULL);
-  ASSERT(fetch(&mgr, buf, url2, "POST / HTTP/1.1\r\n\r\n") == 411);
+  ASSERT(fetch(&mgr, buf, url2, "POST / HTTP/1.1\r\n\r\n") == 200);
   ASSERT(fetch(&mgr, buf, url2, "HTTP/1.1 200\r\n\r\n") == 411);
   ASSERT(fetch(&mgr, buf, url2, "HTTP/1.1 100\r\n\r\n") != 411);
   ASSERT(fetch(&mgr, buf, url2, "HTTP/1.1 304\r\n\r\n") != 411);
   ASSERT(fetch(&mgr, buf, url2, "HTTP/1.1 305\r\n\r\n") == 411);
   ASSERT(fetch(&mgr, buf, url2, post_req) != 411);
-  // Check it is processed only once (see #2811)
-  ASSERT(fpr(&mgr, buf, url2, "POST / HTTP/1.1\r\n\r\n") == 411);
   mg_mgr_free(&mgr);
   ASSERT(mgr.conns == NULL);
 }
@@ -1748,15 +1803,15 @@ static void test_http_parse(void) {
   }
 
   // #2292: fail on stray \r inside the headers
-  ASSERT(mg_http_parse("a є\n\n", 6, &req) == 6);
+  ASSERT(mg_http_parse("a є HTTP/1.0\n\n", 15, &req) == 15);
-  ASSERT(mg_http_parse("a b\n\n", 5, &req) == 5);
+  ASSERT(mg_http_parse("a b HTTP/1.0\n\n", 14, &req) == 14);
-  ASSERT(mg_http_parse("a b\na:\n\n", 8, &req) > 0);
+  ASSERT(mg_http_parse("a b HTTP/1.0\na:\n\n", 17, &req) > 0);
-  ASSERT(mg_http_parse("a b\na:\r\n\n", 9, &req) > 0);
+  ASSERT(mg_http_parse("a b HTTP/1.0\na:\r\n\n", 18, &req) > 0);
-  ASSERT(mg_http_parse("a b\n\ra:\r\n\n", 10, &req) == -1);
+  ASSERT(mg_http_parse("a b HTTP/1.0\n\ra:\r\n\n", 19, &req) == -1);
-  ASSERT(mg_http_parse("a b\na:\r1\n\n", 10, &req) == -1);
+  ASSERT(mg_http_parse("a b HTTP/1.0\na:\r1\n\n", 19, &req) == -1);
-  ASSERT(mg_http_parse("a b\na: \r1\n\n", 11, &req) == -1);
+  ASSERT(mg_http_parse("a b HTTP/1.0\na: \r1\n\n", 20, &req) == -1);
-  ASSERT(mg_http_parse("a b\na: \rb:\n\n", 12, &req) == -1);
+  ASSERT(mg_http_parse("a b HTTP/1.0\na: \rb:\n\n", 21, &req) == -1);
-  ASSERT(mg_http_parse("a b\na: \nb:\n\n", 12, &req) > 0);
+  ASSERT(mg_http_parse("a b HTTP/1.0\na: \nb:\n\n", 21, &req) > 0);
 
   {
     const char *s = "ґєт /слеш HTTP/1.0\nмісто:  кіїв \n\n";
@@ -1794,7 +1849,7 @@ static void test_http_parse(void) {
   {
     const char *s = "POST /x HTTP/1.0\n\n";
     ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s));
-    ASSERT(req.body.len == (size_t) ~0);
+    ASSERT(req.body.len == 0);
   }
 
   {
@@ -1833,8 +1888,7 @@ static void test_http_parse(void) {
   }
 
   {
-    static const char *s =
+    const char *s = "a b HTTP/1.0\na:1\nb:2\nc:3\nd:4\ne:5\nf:6\ng:7\nh:8\n\n";
-        "a b HTTP/1.0\na:1\nb:2\nc:3\nd:4\ne:5\nf:6\ng:7\nh:8\n\n";
     ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s));
     ASSERT((v = mg_http_get_header(&req, "e")) != NULL);
     ASSERT(vcmp(*v, "5"));
@@ -1843,6 +1897,24 @@ static void test_http_parse(void) {
     ASSERT((v = mg_http_get_header(&req, "h")) == NULL);  // MG_MAX_HTTP_HEADERS
   }
 
+  {
+    // no HTTP version
+    const char *s = "a b\na:1\nb:2\nc:2\n\n";
+    ASSERT(mg_http_parse(s, strlen(s), &req) == -1);
+
+    // HTTP version
+    s = "a b HTTP/1.0\na:1\nb:2\nc:2\n\n";
+    ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s));
+
+    // Content-Length
+    s = "a b HTTP/1.0\nContent-Length:10\nb:2\nc:2\n\n";
+    ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s));
+
+    // duplicated Content-Length
+    s = "a b HTTP/1.0\nContent-Length:10\nb:2\nContent-Length:20\n\n";
+    ASSERT(mg_http_parse(s, strlen(s), &req) == -1);
+  }
+
   {
     struct mg_connection c;
     struct mg_str s,
@@ -1868,15 +1940,15 @@ static void test_http_parse(void) {
     struct mg_http_message hm;
     const char *s = "a b HTTP/1.0\n\n";
     ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s));
-    s = "a b\nc:d\n\n";
+    s = "a b HTTP/1.0\nc:d\n\n";
     ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s));
     s = "a\nb:b\nc:c\n\n";
     ASSERT(mg_http_parse(s, strlen(s), &hm) < 0);
-    s = "a b\nc: \xc0\n\n";  // Invalid UTF in the header value: accept
+    s = "a b HTTP/1.0\nc: \xc0\n\n";  // Invalid UTF in the header value: accept
     ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s));
     ASSERT((v = mg_http_get_header(&hm, "c")) != NULL);
     ASSERT(vcmp(*v, "\xc0"));
-    s = "a b\n\xc0: 2\n\n";  // Invalid UTF in the header name: do NOT accept
+    s = "a b HTTP/1.0\n\xc0: 2\n\n";  // Invalid UTF in the header name: do NOT accept
     ASSERT(mg_http_parse(s, strlen(s), &hm) == -1);
   }
 
@@ -2232,6 +2304,16 @@ static void test_str(void) {
   ASSERT(sn("%s ", "a"));
   ASSERT(sn("%s %s", "a", "b"));
   ASSERT(sn("%2s %s", "a", "b"));
+  {  // mg_queue_printf()
+    struct mg_queue q;
+    char buf[128];
+    uint32_t p = 0xffffffff;
+    size_t len;
+    mg_queue_init(&q, buf, sizeof(buf));
+    len = mg_queue_printf(&q, "A%p%p%pB", p, p, p);
+    ASSERT(len == 32);
+    ASSERT(memcmp(buf + 4, "A0xffffffff0xffffffff0xffffffffB", 32) == 0);
+  }
 
   // Non-standard formatting
   {
@@ -2435,7 +2517,7 @@ static void test_str(void) {
     char buf[100];
     struct mg_addr a;
     uint32_t addr = mg_htonl(0x2000001);
-    memcpy(a.ip, &addr, sizeof(uint32_t));
+    memcpy(a.addr.ip, &addr, sizeof(uint32_t));
     a.port = mg_htons(3);
     a.is_ip6 = false;
 
@@ -2445,8 +2527,8 @@ static void test_str(void) {
            11);
     ASSERT(strcmp(buf, "2.0.0.1:3 7") == 0);
 
-    memset(a.ip, 0, sizeof(a.ip));
+    memset(a.addr.ip, 0, sizeof(a.addr.ip));
-    a.ip[0] = 1, a.ip[1] = 100, a.ip[2] = 33;
+    a.addr.ip[0] = 1, a.addr.ip[1] = 100, a.addr.ip[2] = 33;
     a.is_ip6 = true;
     ASSERT(mg_snprintf(buf, sizeof(buf), "%M %d", mg_print_ip, &a, 7) == 24);
     ASSERT(strcmp(buf, "[164:2100:0:0:0:0:0:0] 7") == 0);
@@ -2574,6 +2656,8 @@ static void test_util(void) {
   const char *e;
   char buf[100], *s;
   struct mg_addr a;
+  uint64_t ipv3;
+  uint8_t d64[8] = {0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef};
   uint32_t ipv4;
   uint16_t port;
   struct mg_str data;
@@ -2591,7 +2675,7 @@ static void test_util(void) {
   ASSERT(mg_aton(mg_str("0.0.0.-1"), &a) == false);
   ASSERT(mg_aton(mg_str("127.0.0.1"), &a) == true);
   ASSERT(a.is_ip6 == false);
-  memcpy(&ipv4, a.ip, sizeof(ipv4));
+  memcpy(&ipv4, &a.addr.ip4, sizeof(ipv4));
   ASSERT(ipv4 == mg_htonl(0x7f000001));
   ASSERT(mg_ntohl(ipv4) == 0x7f000001);
   MG_STORE_BE32(&ipv4, 0x5678abcd);
@@ -2608,48 +2692,62 @@ static void test_util(void) {
          ((uint8_t *) &ipv4)[2] == 0x45);
   ASSERT(MG_LOAD_BE24(&ipv4) == 0xef2345);
 
-  memset(a.ip, 0xa5, sizeof(a.ip));
+  memcpy(&ipv3, d64, sizeof(ipv3));
+#if defined(_MSC_VER) && _MSC_VER < 1700
+  // VC98 doesn't suppport LL suffix
+#else
+  ASSERT(ipv3 == mg_htonll(0x1234567890abcdefLL));
+  ASSERT(mg_ntohll(ipv3) == 0x1234567890abcdefLL);
+#endif
+  MG_STORE_BE64(&ipv3, 0x5678abcd12349ef0);
+  ASSERT(((uint8_t *) &ipv3)[0] == 0x56 && ((uint8_t *) &ipv3)[1] == 0x78 &&
+         ((uint8_t *) &ipv3)[2] == 0xab && ((uint8_t *) &ipv3)[3] == 0xcd &&
+         ((uint8_t *) &ipv3)[4] == 0x12 && ((uint8_t *) &ipv3)[5] == 0x34 &&
+         ((uint8_t *) &ipv3)[6] == 0x9e && ((uint8_t *) &ipv3)[7] == 0xf0);
+  ASSERT(MG_LOAD_BE64(&ipv3) == 0x5678abcd12349ef0);
+
+  memset(a.addr.ip, 0xa5, sizeof(a.addr.ip)), a.is_ip6 = false;
   ASSERT(mg_aton(mg_str("1:2:3:4:5:6:7:8"), &a) == true);
   ASSERT(a.is_ip6 == true);
   e = "\x00\x01\x00\x02\x00\x03\x00\x04\x00\x05\x00\x06\x00\x07\x00\x08";
-  ASSERT(memcmp(a.ip, e, sizeof(a.ip)) == 0);
+  ASSERT(memcmp(&a.addr.ip6, e, sizeof(a.addr.ip6)) == 0);
 
-  memset(a.ip, 0xa5, sizeof(a.ip));
+  memset(a.addr.ip, 0xa5, sizeof(a.addr.ip)), a.is_ip6 = false;
   ASSERT(mg_aton(mg_str("1:2::3"), &a) == true);
   ASSERT(a.is_ip6 == true);
   e = "\x00\x01\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03";
-  ASSERT(memcmp(a.ip, e, sizeof(a.ip)) == 0);
+  ASSERT(memcmp(&a.addr.ip6, e, sizeof(a.addr.ip6)) == 0);
 
-  memset(a.ip, 0xaa, sizeof(a.ip));
+  memset(a.addr.ip, 0xaa, sizeof(a.addr.ip)), a.is_ip6 = false;
   ASSERT(mg_aton(mg_str("1::1"), &a) == true);
   ASSERT(a.is_ip6 == true);
   e = "\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01";
-  ASSERT(memcmp(a.ip, e, sizeof(a.ip)) == 0);
+  ASSERT(memcmp(&a.addr.ip6, e, sizeof(a.addr.ip6)) == 0);
 
-  memset(a.ip, 0xaa, sizeof(a.ip));
+  memset(a.addr.ip, 0xaa, sizeof(a.addr.ip)), a.is_ip6 = false;
   ASSERT(mg_aton(mg_str("::fFff:1.2.3.4"), &a) == true);
   ASSERT(a.is_ip6 == true);
   e = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff\x01\x02\x03\x04";
-  ASSERT(memcmp(a.ip, e, sizeof(a.ip)) == 0);
+  ASSERT(memcmp(&a.addr.ip6, e, sizeof(a.addr.ip6)) == 0);
 
-  memset(a.ip, 0xaa, sizeof(a.ip));
+  memset(a.addr.ip, 0xaa, sizeof(a.addr.ip)), a.is_ip6 = false;
   ASSERT(mg_aton(mg_str("::1"), &a) == true);
   ASSERT(a.is_ip6 == true);
   ASSERT(a.scope_id == 0);
   e = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01";
-  ASSERT(memcmp(a.ip, e, sizeof(a.ip)) == 0);
+  ASSERT(memcmp(&a.addr.ip6, e, sizeof(a.addr.ip6)) == 0);
 
-  memset(a.ip, 0xaa, sizeof(a.ip));
+  memset(a.addr.ip, 0xaa, sizeof(a.addr.ip)), a.is_ip6 = false;
   ASSERT(mg_aton(mg_str("1::"), &a) == true);
   ASSERT(a.is_ip6 == true);
   e = "\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";
-  ASSERT(memcmp(a.ip, e, sizeof(a.ip)) == 0);
+  ASSERT(memcmp(&a.addr.ip6, e, sizeof(a.addr.ip6)) == 0);
 
-  memset(a.ip, 0xaa, sizeof(a.ip));
+  memset(a.addr.ip, 0xaa, sizeof(a.addr.ip)), a.is_ip6 = false;
   ASSERT(mg_aton(mg_str("2001:4860:4860::8888"), &a) == true);
   ASSERT(a.is_ip6 == true);
   e = "\x20\x01\x48\x60\x48\x60\x00\x00\x00\x00\x00\x00\x00\x00\x88\x88";
-  ASSERT(memcmp(a.ip, e, sizeof(a.ip)) == 0);
+  ASSERT(memcmp(&a.addr.ip6, e, sizeof(a.addr.ip6)) == 0);
 
   ASSERT(mg_url_decode("a=%", 3, buf, sizeof(buf), 0) < 0);
   ASSERT(mg_url_decode("&&&a=%", 6, buf, sizeof(buf), 0) < 0);
@@ -2658,22 +2756,22 @@ static void test_util(void) {
   ASSERT(mg_url_decode("a=%123", 6, buf, sizeof(buf), 0) == 4 &&
          buf[2] == 0x12 && buf[3] == '3');
 
-  memset(a.ip, 0xaa, sizeof(a.ip));
+  memset(&a, 0, sizeof(a));
   ASSERT(mg_aton(mg_str("::1%1"), &a) == true);
   ASSERT(a.is_ip6 == true);
   ASSERT(a.scope_id == 1);
 
-  memset(a.ip, 0xaa, sizeof(a.ip));
+  memset(&a, 0, sizeof(a));
   ASSERT(mg_aton(mg_str("abcd::aabb:ccdd%17"), &a) == true);
   ASSERT(a.is_ip6 == true);
   ASSERT(a.scope_id == 17);
 
-  memset(a.ip, 0xaa, sizeof(a.ip));
+  memset(&a, 0xaa, sizeof(a)), a.is_ip6 = false;
   ASSERT(mg_aton(mg_str("::1%17"), &a) == true);
   ASSERT(a.is_ip6 == true);
   ASSERT(a.scope_id == 17);
 
-  memset(a.ip, 0xaa, sizeof(a.ip));
+  memset(&a, 0xaa, sizeof(a)), a.is_ip6 = false;
   ASSERT(mg_aton(mg_str("::1%255"), &a) == true);
   ASSERT(a.is_ip6 == true);
   ASSERT(a.scope_id == 255);
@@ -2918,6 +3016,14 @@ static void eZ(struct mg_connection *c, int ev, void *ev_data) {
   (void) ev_data;
 }
 
+static void eS(struct mg_connection *c, int ev, void *ev_data) {
+  if (ev == MG_EV_HTTP_MSG) {
+    ASSERT(mg_send(c, "NADA", 0));
+    mg_http_reply(c, 200, "", "abcd");
+  }
+  (void) ev_data;
+}
+
 // Do not delete chunks as they arrive
 static void eh4(struct mg_connection *c, int ev, void *ev_data) {
   uint32_t *crc = (uint32_t *) c->fn_data;
@@ -2953,6 +3059,9 @@ static void test_http_chunked_case(mg_event_handler_t s, mg_event_handler_t c,
 }
 
 static void test_http_chunked(void) {
+  // test mg_send allows calls with 0 length
+  test_http_chunked_case(eS, eh4, 1, "abcd");
+
   // Non-chunked encoding
   test_http_chunked_case(eY, eh4, 1, "abcd");  // Chunks not deleted
   test_http_chunked_case(eY, eh4, 2, "abcdabcd");
@@ -3176,7 +3285,7 @@ static void test_udp(void) {
 }
 
 static void test_check_ip_acl(void) {
-  struct mg_addr ip = {{1, 2, 3, 4}, 0, 0, false};  // 1.2.3.4
+  struct mg_addr ip = {{{1, 2, 3, 4}}, 0, 0, false};  // 1.2.3.4
   ASSERT(mg_check_ip_acl(mg_str(NULL), &ip) == 1);
   ASSERT(mg_check_ip_acl(mg_str(""), &ip) == 1);
   ASSERT(mg_check_ip_acl(mg_str("invalid"), &ip) == -1);
@@ -3540,6 +3649,39 @@ static void test_json(void) {
     val = mg_json_get_tok(json, "$.a");
     ASSERT(mg_strcmp(val, expected) == 0);
   }
+
+  // mg_json_get_num: parsing exponential
+  {
+    double d = 0.0, tolerance = 1e-12;
+    json = mg_str(
+      "{"
+      "\"i\":1e3,"
+      "\"n\":-2.5e2,"
+      "\"p\":3E+4,"
+      "\"m\":4.25E-1,"
+      "\"z\":0e0,"
+      "\"s\":-0.0e+0,"
+      "\"a\":[6.123456789e3,-1e-9],"
+      "\"bad\":\"1e3\""
+      "}");
+    ASSERT(mg_json_get_num(json, "$.i", &d) == true);
+    ASSERT(fabs(d - 1000.0) < tolerance);
+    ASSERT(mg_json_get_num(json, "$.n", &d) == true);
+    ASSERT(fabs(d - -250.0) < tolerance);
+    ASSERT(mg_json_get_num(json, "$.p", &d) == true);
+    ASSERT(fabs(d - 30000.0) < tolerance);
+    ASSERT(mg_json_get_num(json, "$.m", &d) == true);
+    ASSERT(fabs(d - 0.425) < tolerance);
+    ASSERT(mg_json_get_num(json, "$.z", &d) == true);
+    ASSERT(fabs(d - 0.0) < tolerance);
+    ASSERT(mg_json_get_num(json, "$.s", &d) == true);
+    ASSERT(fabs(d - 0.0) < tolerance);
+    ASSERT(mg_json_get_num(json, "$.a[0]", &d) == true);
+    ASSERT(fabs(d - 6123.456789) < tolerance);
+    ASSERT(mg_json_get_num(json, "$.a[1]", &d) == true);
+    ASSERT(fabs(d - -1e-9) < tolerance);
+    ASSERT(mg_json_get_num(json, "$.bad", &d) == false);
+  }
 }
 
 static void resp_rpc(struct mg_rpc_req *r) {
@@ -3953,54 +4095,134 @@ static void test_crypto(void) {
   test_rsa();
 }
 
+#define DASHBOARD(x) \
+  printf("HEALTH_DASHBOARD\t\"%s\": %s,\n", x, s_error ? "false" : "true");
+
 int main(void) {
   const char *debug_level = getenv("V");
   if (debug_level == NULL) debug_level = "3";
   mg_log_set(atoi(debug_level));
 
+  s_error = false;
   test_crypto();
+  DASHBOARD("crypto");
+
+  s_error = false;
   test_split();
-  test_json();
+  test_util();
-  test_queue();
-  test_rpc();
   test_str();
   test_match();
+  test_crc32();
+  DASHBOARD("misc");
+
+  s_error = false;
+  test_json();
+  DASHBOARD("json");
+
+  s_error = false;
+  test_queue();
+  DASHBOARD("queue");
+
+  s_error = false;
+  test_rpc();
+  DASHBOARD("rpc");
+
+  s_error = false;
+  test_check_ip_acl();
+  DASHBOARD("ip_acl");
+
+  s_error = false;
+  test_udp();
+  DASHBOARD("udp");
+
+  s_error = false;
   test_get_header_var();
+  test_http_get_var();
   test_http_parse();
   test_rewrites();
-  test_check_ip_acl();
-  test_udp();
-  test_packed();
-  test_crc32();
   test_multipart();
   test_invalid_listen_addr();
   test_http_chunked();
-  test_http_upload();
+  DASHBOARD("http_support");
-  test_http_stream_buffer();
+
-  test_util();
+  s_error = false;
+  test_packed();
+  DASHBOARD("packed_fs");
+
+  s_error = false;
   test_dns();
+  DASHBOARD("dns");
+
+  s_error = false;
   test_timer();
+  DASHBOARD("timers");
+
+  s_error = false;
   test_url();
+  DASHBOARD("url");
+
+  s_error = false;
   test_iobuf();
+  DASHBOARD("iobuf");
+
+  s_error = false;
   test_base64();
-  test_http_get_var();
+  DASHBOARD("base64");
+
+  s_error = false;
   test_tls();
+  DASHBOARD("tls");
+
+  s_error = false;
   test_ws();
   test_ws_fragmentation();
+  DASHBOARD("ws");
+
+  s_error = false;
+  test_http_upload();
+  test_http_stream_buffer();
   test_http_server();
   test_http_404();
   test_http_no_content_length();
   test_http_pipeline();
   test_http_range();
+  DASHBOARD("http_server");
+
 #ifndef LOCALHOST_ONLY
+  s_error = false;
   test_sntp();
-  test_mqtt();  // sorry, MQTT_LOCALHOST is also skipped 
+  DASHBOARD("sntp");
+
+#if MG_TLS != MG_TLS_BUILTIN
+  s_error = false;
+  test_mqtt();  // sorry, MQTT_LOCALHOST is also skipped
+  DASHBOARD("mqtt");
+#else 
+  (void) test_mqtt;
+#endif
+
+  s_error = false;
   test_http_client();
+  DASHBOARD("http_client");
+
 #else
   (void) test_sntp, (void) test_mqtt, (void) test_http_client;
 #endif
+  s_error = false;
   test_poll();
-  printf("SUCCESS. Total tests: %d\n", s_num_tests);
+  printf("HEALTH_DASHBOARD\t\"poll\": %s\n", s_error ? "false" : "true");
+  // last entry with no comma
 
+#ifdef NO_ABORT
+  if (s_abort != 0) return EXIT_FAILURE;
+#endif
+
+#if defined(MBEDTLS_VERSION_NUMBER) && MBEDTLS_VERSION_NUMBER >= 0x03000000 && \
+    defined(MBEDTLS_PSA_CRYPTO_C)
+  // Call mbedtls_psa_crypto_free() here to avoid triggering memory-leak
+  // detectors. We are actually freeing all our resources and leaving
+  mbedtls_psa_crypto_free();
+#endif
+  printf("SUCCESS. Total tests: %d\n", s_num_tests);
   return EXIT_SUCCESS;
 }

tutorials/core/memory/o1heap/Makefile

@@ -0,0 +1,33 @@
+SOURCES = main.c mongoose.c       # Source code files
+CFLAGS = -W -Wall -Wextra -g -I.  # Build options
+
+# O(1) Heap
+SOURCES += o1heap/o1heap/o1heap.c
+CFLAGS += -Io1heap/o1heap
+
+# Mongoose build options. See https://mongoose.ws/documentation/#build-options
+CFLAGS_MONGOOSE += -DMG_ENABLE_CUSTOM_CALLOC
+
+ifeq ($(OS),Windows_NT)
+  # Windows settings. Assume MinGW compiler. To use VC: make CC=cl CFLAGS=/MD
+  PROG ?= example.exe                 # Use .exe suffix for the binary
+  CC = gcc                            # Use MinGW gcc compiler
+  CFLAGS += -lws2_32                  # Link against Winsock library
+  DELETE = cmd /C del /f /q /s        # Command prompt command to delete files
+else
+  # Mac, Linux
+  PROG ?= example
+  DELETE = rm -rf
+endif
+
+all: $(PROG)
+	$(RUN) ./$(PROG) $(ARGS)
+
+$(PROG): $(SOURCES)
+	$(CC) $(SOURCES) $(CFLAGS) $(CFLAGS_MONGOOSE) $(CFLAGS_EXTRA) -o $@
+
+o1heap/o1heap/o1heap.c:  # O(1) Heap sources
+	git clone --depth 1 -b 2.1.0 https://github.com/pavel-kirienko/o1heap.git
+
+clean:
+	$(DELETE) $(PROG) *.o *.obj *.exe *.dSYM

tutorials/core/memory/o1heap/main.c

@@ -0,0 +1,77 @@
+// Copyright (c) 2025 Cesanta Software Limited
+// All rights reserved
+
+#include "mongoose.h"
+#include "o1heap.h"
+
+#define POOL_SIZE (5 * MG_IO_SIZE)
+
+O1HeapInstance *s_mem;
+
+// memory allocation
+void *mg_calloc(size_t count, size_t size) {
+  size_t bytes = count * size;
+  void *ptr = o1heapAllocate(s_mem, bytes);
+  if (ptr != NULL) memset(ptr, 0, bytes);
+  if (ptr != NULL) MG_DEBUG(("%lu bytes @%p", bytes, ptr));
+  if (ptr == NULL) MG_ERROR(("Failed to allocate %lu bytes", bytes));
+  return ptr;
+}
+
+void mg_free(void *ptr) {
+  o1heapFree(s_mem, ptr);
+  if (ptr != NULL) MG_DEBUG(("block @%p", ptr));
+}
+
+// HTTP request callback
+static void fn(struct mg_connection *c, int ev, void *ev_data) {
+  if (ev == MG_EV_HTTP_MSG) {
+    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    if (mg_match(hm->uri, mg_str("/hi"), NULL)) {
+      mg_http_reply(c, 200, "Host: foo.com\r\n", "hi\n");
+    } else if (mg_match(hm->uri, mg_str("/echo"), NULL)) {
+      mg_http_reply(c, 200, "", "%.*s", (int) hm->body.len, hm->body.buf);
+    } else if (mg_match(hm->uri, mg_str("/stats"), NULL)) {
+      struct mg_connection *t;
+      mg_printf(c, "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n");
+      mg_http_printf_chunk(c, "ID PROTO TYPE      LOCAL           REMOTE\n");
+      for (t = c->mgr->conns; t != NULL; t = t->next) {
+        mg_http_printf_chunk(c, "%-3lu %4s %s %M %M\n", t->id,
+                             t->is_udp ? "UDP" : "TCP",
+                             t->is_listening  ? "LISTENING"
+                             : t->is_accepted ? "ACCEPTED "
+                                              : "CONNECTED",
+                             mg_print_ip, &t->loc, mg_print_ip, &t->rem);
+      }
+      mg_http_printf_chunk(c, "");  // Don't forget the last empty chunk
+    } else {
+      struct mg_http_serve_opts opts;
+      memset(&opts, 0, sizeof(opts));
+      opts.root_dir = ".";
+      mg_http_serve_dir(c, ev_data, &opts);
+    }
+  }
+}
+
+int main(void) {
+  struct mg_mgr mgr;
+
+  void *pool = malloc(POOL_SIZE + O1HEAP_ALIGNMENT);
+  void *aligned = (void *) (((uintptr_t) pool) & ~(O1HEAP_ALIGNMENT - 1));
+  O1HeapDiagnostics d;
+  s_mem = o1heapInit(aligned, POOL_SIZE);
+  d = o1heapGetDiagnostics(s_mem);
+  MG_INFO(
+      ("Created aligned %lu-byte pool @%p, out of a %lu-byte allocated system "
+       "memory pool",
+       d.capacity, s_mem, POOL_SIZE));
+
+  mg_mgr_init(&mgr);        // Initialise event manager
+  mg_log_set(MG_LL_DEBUG);  // Set debug log level
+  mg_http_listen(&mgr, "http://localhost:8000", fn, NULL);  // Create listener
+  for (;;) {                                                // Event loop
+    mg_mgr_poll(&mgr, 1000);
+  }
+  mg_mgr_free(&mgr);
+  return 0;
+}

tutorials/core/memory/o1heap/mongoose.c

@@ -0,0 +1 @@
+../../../../mongoose.c