Add mg_mqtt_next_unsub() signature

README.md: fix typo: is_drainig -> is_draining

.github/workflows/test.yml

@@ -0,0 +1,40 @@
+name: build
+on: [push, pull_request]
+jobs:
+  linux:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install packages
+      run: sudo apt-get install libmbedtls-dev
+    - name: make
+      run: make test test++ IPV6=0
+    - name: openssl
+      run: make test SSL=OPENSSL IPV6=0
+    - name: examples
+      run: make ex
+  macos:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install packages
+      run: HOMEBREW_NO_AUTO_UPDATE=1 brew install jq mbedtls openssl
+    - name: make
+      run: make test++ upload-coverage IPV6=0
+    - name: openssl
+      run: make test SSL=OPENSSL IPV6=0
+    - name: exports
+      run: make mg_prefix
+  windows:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: vc98
+      run: make vc98
+    - name: vc2017
+      run: make vc2017
+    - name: mingw
+      run: make mingw
+    - name: mingw++
+      run: make mingw++
+

.travis.yml

@@ -1,23 +0,0 @@
-language: c
-sudo: false
-after_success: bash <(curl -s https://codecov.io/bash)
-install:
-  - if test "$TRAVIS_OS_NAME" = linux; then sudo apt-get install libmbedtls-dev; else brew install jq mbedtls; fi
-os:
-  - linux
-  - osx
-compiler:
-  - clang
-  - gcc
-script: make test test++ ex
-matrix:
-  include:
-    - os: osx
-      compiler: clang
-      script: make mg_prefix
-    - os: linux
-      compiler: msvc98
-      script: make vc98 vc2017
-      sudo: required
-      services:
-        - docker

Makefile

@@ -1,14 +1,16 @@
 SRCS = $(wildcard src/*.c)
 HDRS = $(wildcard src/*.h)
-DEFS ?= -DMG_MAX_HTTP_HEADERS=5 -DMG_ENABLE_LINES -DMG_ENABLE_HTTP_DEBUG_ENDPOINT=1 -DMG_ENABLE_DIRECTORY_LISTING=1
+DEFS ?= -DMG_MAX_HTTP_HEADERS=5 -DMG_ENABLE_LINES -DMG_ENABLE_DIRECTORY_LISTING=1 -DMG_ENABLE_SSI=1
 CFLAGS ?= -W -Wall -Werror -Isrc -I. -O0 -g $(DEFS) $(TFLAGS) $(EXTRA)
 SSL ?= MBEDTLS
 CDIR ?= $(realpath $(CURDIR))
 VC98 = docker run --rm -e WINEDEBUG=-all -v $(CDIR):$(CDIR) -w $(CDIR) docker.io/mdashnet/vc98
 VC2017 = docker run --rm -e WINEDEBUG=-all -v $(CDIR):$(CDIR) -w $(CDIR) docker.io/mdashnet/vc2017
+MINGW = docker run --rm -v $(CDIR):$(CDIR) -w $(CDIR) docker.io/mdashnet/mingw
 GCC = docker run --rm -v $(CDIR):$(CDIR) -w $(CDIR) mdashnet/cc2
 VCFLAGS = /nologo /W3 /O2 /I. $(DEFS) $(TFLAGS)
 CLANG ?= clang # /usr/local/opt/llvm\@9/bin/clang
+IPV6 ?= 1
 ASAN_OPTIONS ?=
 EXAMPLES := $(wildcard examples/*)
 EXAMPLE_TARGET ?= example
@@ -22,12 +24,14 @@ CFLAGS += -DMG_ENABLE_MBEDTLS=1 -I$(MBEDTLS)/include -I/usr/include
 LDFLAGS ?= -L$(MBEDTLS)/lib -lmbedtls -lmbedcrypto -lmbedx509
 endif
 ifeq "$(SSL)" "OPENSSL"
-OPENSSLDIR ?= $(shell "$(brew --cellar openssl)/$(brew info openssl --json | jq -j .[0].installed[0].version)")
+OPENSSL_DIR ?= $(shell brew --cellar openssl)
-CFLAGS += -DMG_ENABLE_OPENSSL=1 -I$(OPENSSLDIR)/include
+OPENSSL_VER ?= $(shell brew info openssl --json | jq -j .[0].installed[0].version)
-LDFLAGS ?= -L$(OPENSSLDIR)/lib -lssl -lcrypto
+OPENSSL ?= $(OPENSSL_DIR)/$(OPENSSL_VER)
+CFLAGS += -DMG_ENABLE_OPENSSL=1 -I$(OPENSSL)/include
+LDFLAGS ?= -L$(OPENSSL)/lib -lssl -lcrypto
 endif
 
-all: mg_prefix test test++ ex vc98 vc2017 linux linux++ infer fuzz
+all: mg_prefix test test++ ex vc98 vc2017 mingw mingw++ linux linux++ infer fuzz
 
 ex:
 	@for X in $(EXAMPLES); do $(MAKE) -C $$X $(EXAMPLE_TARGET); done
@@ -45,11 +49,11 @@ unamalgamated: $(SRCS) $(HDRS) Makefile
 	$(CLANG) src/*.c test/unit_test.c $(CFLAGS) $(LDFLAGS) -g -o unit_test
 
 fuzz: mongoose.c mongoose.h Makefile test/fuzz.c
-	$(CLANG) mongoose.c test/fuzz.c $(CFLAGS) -DMG_ENABLE_LOG=0 -fsanitize=fuzzer,signed-integer-overflow,address $(LDFLAGS) -g -o fuzzer
+	$(CLANG) mongoose.c test/fuzz.c $(CFLAGS) -DMG_ENABLE_LINES -DMG_ENABLE_LOG=0 -fsanitize=fuzzer,signed-integer-overflow,address $(LDFLAGS) -g -o fuzzer
 	$(DEBUGGER) ./fuzzer
 
 # make CLANG=/usr/local/opt/llvm\@8/bin/clang ASAN_OPTIONS=detect_leaks=1
-test: CFLAGS += -DMG_ENABLE_IPV6=1 -fsanitize=address#,undefined
+test: CFLAGS += -DMG_ENABLE_IPV6=$(IPV6) -fsanitize=address#,undefined
 test: mongoose.c mongoose.h  Makefile test/unit_test.c
 	$(CLANG) mongoose.c test/unit_test.c $(CFLAGS) -coverage $(LDFLAGS) -g -o unit_test
 	ASAN_OPTIONS=$(ASAN_OPTIONS) $(DEBUGGER) ./unit_test
@@ -58,6 +62,9 @@ coverage: test
 	gcov -l -n *.gcno | sed '/^$$/d' | sed 'N;s/\n/ /'
 	gcov mongoose.gcno >/dev/null
 
+upload-coverage: coverage
+	curl -s https://codecov.io/bash | /bin/bash
+
 infer:
 	infer run -- cc test/unit_test.c -c -W -Wall -Werror -Isrc -I. -O2 -DMG_ENABLE_MBEDTLS=1 -DMG_ENABLE_LINES -I/usr/local/Cellar/mbedtls/2.23.0/include  -DMG_ENABLE_IPV6=1 -g -o /dev/null
 
@@ -66,12 +73,21 @@ vc98: Makefile mongoose.c mongoose.h test/unit_test.c
 	$(VC98) wine cl mongoose.c test/unit_test.c $(VCFLAGS) ws2_32.lib /Fe$@.exe
 	$(VC98) wine $@.exe
 
-vc2017: CFLAGS += -DMG_ENABLE_IPV6=1
+#vc2017: VCFLAGS += -DMG_ENABLE_IPV6=1
 vc2017: Makefile mongoose.c mongoose.h test/unit_test.c
 	$(VC2017) wine64 cl mongoose.c test/unit_test.c $(VCFLAGS) ws2_32.lib /Fe$@.exe
 	$(VC2017) wine64 $@.exe
 
-linux: CFLAGS += -DMG_ENABLE_IPV6=1 -fsanitize=address,undefined
+mingw: Makefile mongoose.c mongoose.h test/unit_test.c
+	$(MINGW) i686-w64-mingw32-gcc mongoose.c test/unit_test.c -W -Wall -Werror -I. $(DEFS) -lwsock32 -o test.exe
+	$(VC98) wine test.exe
+
+mingw++: Makefile mongoose.c mongoose.h test/unit_test.c
+	$(MINGW) i686-w64-mingw32-g++ mongoose.c test/unit_test.c -W -Wall -Werror -I. $(DEFS) -lwsock32 -o test.exe
+  # Note: for some reason, a binary built with mingw g++, fails to run
+
+#linux: CFLAGS += -DMG_ENABLE_IPV6=$(IPV6)
+linux: CFLAGS += -fsanitize=address,undefined
 linux: Makefile mongoose.c mongoose.h test/unit_test.c
 	$(GCC) $(CC) mongoose.c test/unit_test.c $(CFLAGS) $(LDFLAGS) -o unit_test_gcc
 	$(GCC) ./unit_test_gcc
@@ -83,7 +99,7 @@ mongoose.c: $(SRCS) Makefile
 	(cat src/license.h; echo; echo '#include "mongoose.h"' ; (for F in src/private.h src/*.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
-	(cat src/license.h src/version.h ; cat src/arch.h src/arch_*.h src/config.h src/str.h src/log.h src/timer.h src/util.h src/url.h src/iobuf.h src/base64.h src/md5.h src/sha1.h src/event.h src/net.h src/http.h src/tls.h src/ws.h src/sntp.h src/mqtt.h src/dns.h | sed -e 's,#include ".*,,' -e 's,^#pragma once,,')> $@
+	(cat src/license.h src/version.h ; cat src/arch.h src/arch_*.h src/config.h src/str.h src/log.h src/timer.h src/util.h src/url.h src/iobuf.h src/base64.h src/md5.h src/sha1.h src/event.h src/net.h src/http.h src/ssi.h src/tls.h src/ws.h src/sntp.h src/mqtt.h src/dns.h | sed -e 's,#include ".*,,' -e 's,^#pragma once,,')> $@
 
 clean: EXAMPLE_TARGET = clean
 clean: ex

README.md

@@ -1,8 +1,9 @@
 # Mongoose - Embedded Web Server / Embedded Networking Library
 
 ![License: GPLv2](https://img.shields.io/badge/license-GPL_2-green.svg "License")
-[![Build Status](https://travis-ci.org/cesanta/mongoose.svg?branch=master)](https://travis-ci.org/cesanta/mongoose)
+[![Build Status]( https://github.com/cesanta/mongoose/workflows/build/badge.svg)](https://github.com/cesanta/mongoose/actions)
 [![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://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:mongoose)
 
 Mongoose is a networking library for C/C++. It implements event-driven
 non-blocking APIs for TCP, UDP, HTTP, WebSocket, MQTT.  It has been designed
@@ -20,7 +21,10 @@ on the top 9 things to avoid when embedding a web server.
 
 - [Download “9 Things NOT to do when embedding a web server” white paper here](https://www.cesanta.com/whitepaper.html)
 
-Looking for a complete IoT solution? Check out
+# Looking for a pre-compiled Mongoose web server Windows or Mac binary?
+- [Download pre-compiled Mongoose web server binary](https://mongoose.ws/)
+
+# Looking for a complete IoT solution? Check out
 - [VCON](https://vcon.io) - Arduino compatible MCU modules with built-in firmware OTA updates
 - [Mongoose OS](https://mongoose-os.com) - open source embedded operating system for low-power connected microcontrollers. Secure, designed for commercial Internet of Things products
 
@@ -32,17 +36,11 @@ Looking for a complete IoT solution? Check out
 
 # Features
 
-* Cross-platform: works on Linux/UNIX, MacOS, QNX, eCos, Windows, Android,
+* Cross-platform: works on Linux/UNIX, MacOS, Windows, Android, FreeRTOS, etc
-  iPhone, FreeRTOS, etc
+* Supported embedded architectures: ESP32, ESP8266, TI, NRF52, STM32, PIC32, NXP, and more
-* Supported hardware platforms: TI CC3200, TI MSP432, NRF52, STM32, PIC32, ESP8266, ESP32 and more
+* Builtin protocols: plain TCP/UDP, HTTP, MQTT, Websocket
-* Builtin protocols:
+* SSL/TLS support: mbedTLS, OpenSSL or custom (via API)
-   - plain TCP, plain UDP, SSL/TLS (over TCP, one-way or two-way)
+* Asynchronous DNS resolver
-   - HTTP client, HTTP server
-   - WebSocket client, WebSocket server
-   - MQTT client
-   - DNS client, async DNS resolver
-* Single-threaded, asynchronous, non-blocking core with simple event-based API
-* Native support for [LWIP embedded TCP/IP stack](https://en.wikipedia.org/wiki/LwIP)
 * Tiny static and run-time footprint
 * Source code is both ISO C and ISO C++ compliant
 * Very easy to integrate: just copy
@@ -74,5 +72,4 @@ Contributions are welcome! Please follow the guidelines below:
 - When making pull requests, please make sure that it has only one commit,
  and imlements/fixes only one piece of functionality
 
-# Looking for a pre-compiled Mongoose web server Windows or Mac binary?
+
-- [Download pre-compiled Mongoose web server binary.](https://www.cesanta.com/binary.html)

docs/README.md

@@ -133,18 +133,20 @@ to an event handler:
 
 ```c
 enum {
-  MG_EV_ERROR,     // Error                        char *error_message
+  MG_EV_ERROR,      // Error                        char *error_message
-  MG_EV_POLL,      // mg_mgr_poll iteration        unsigned long *millis
+  MG_EV_POLL,       // mg_mgr_poll iteration        unsigned long *millis
-  MG_EV_RESOLVE,   // Host name is resolved        NULL
+  MG_EV_RESOLVE,    // Host name is resolved        NULL
-  MG_EV_CONNECT,   // Connection established       NULL
+  MG_EV_CONNECT,    // Connection established       NULL
-  MG_EV_ACCEPT,    // Connection accepted          NULL
+  MG_EV_ACCEPT,     // Connection accepted          NULL
-  MG_EV_READ,      // Data received from socket    struct mg_str *
+  MG_EV_READ,       // Data received from socket    struct mg_str *
-  MG_EV_WRITE,     // Data written to socket       int *num_bytes_written
+  MG_EV_WRITE,      // Data written to socket       int *num_bytes_written
-  MG_EV_CLOSE,     // Connection closed            NULL
+  MG_EV_CLOSE,      // Connection closed            NULL
-  MG_EV_HTTP_MSG,  // HTTP request/response        struct mg_http_message *
+  MG_EV_HTTP_MSG,   // HTTP request/response        struct mg_http_message *
-  MG_EV_WS_OPEN,    // Websocket handshake done     NULL
+  MG_EV_WS_OPEN,    // Websocket handshake done     struct mg_http_message *
-  MG_EV_WS_MSG,     // Websocket message received   struct mg_ws_message *
+  MG_EV_WS_MSG,     // Websocket msg, text or bin   struct mg_ws_message *
-  MG_EV_MQTT_MSG,   // MQTT message                 struct mg_mqtt_message *
+  MG_EV_WS_CTL,     // Websocket control msg        struct mg_ws_message *
+  MG_EV_MQTT_CMD,   // MQTT low-level command       struct mg_mqtt_message *
+  MG_EV_MQTT_MSG,   // MQTT PUBLISH received        struct mg_mqtt_message *
   MG_EV_MQTT_OPEN,  // MQTT CONNACK received        int *connack_status_code
   MG_EV_SNTP_TIME,  // SNTP time received           struct timeval *
   MG_EV_USER,       // Starting ID for user events
@@ -157,10 +159,10 @@ enum {
 they can be either 0 or 1.  Some flags are set by Mongoose and must be not
 changed by an application code, for example `is_udp` flag tells application if
 that connection is UDP or not.  Some flags can be changed by application, for
-example, `is_drainig` flag, if set by an application, tells Mongoose to send
+example, `is_draining` flag, if set by an application, tells Mongoose to send
 the remaining data to peer, and when everything is sent, close the connection.
 
-User-changeable flags are: `is_hexdumping`, `is_drainig`, `is_closing`.
+User-changeable flags are: `is_hexdumping`, `is_draining`, `is_closing`.
 
 This is taken from `mongoose.h` as-is:
 
@@ -221,12 +223,68 @@ Here is a list of build constants and their default values:
 |`MG_ENABLE_LOG` | 1 | Enable `LOG()` macro |
 |`MG_ENABLE_MD5` | 0 | Use native MD5 implementation |
 |`MG_ENABLE_DIRECTORY_LISTING` | 0 | Enable directory listing for HTTP server |
-|`MG_ENABLE_HTTP_DEBUG_ENDPOINT` | 0 | Enable `/debug/info` debug URI |
 |`MG_ENABLE_SOCKETPAIR` | 0 | Enable `mg_socketpair()` for multi-threading |
+|`MG_ENABLE_SSI` | 0 | Enable serving SSI files by `mg_http_serve_dir()` |
 |`MG_IO_SIZE` | 512 | Granularity of the send/recv IO buffer growth |
 |`MG_MAX_RECV_BUF_SIZE` | (3 * 1024 * 1024) | Maximum recv buffer size |
 |`MG_MAX_HTTP_HEADERS` | 40 | Maximum number of HTTP headers |
 
+NOTE: `MG_IO_SIZE` controls the maximum UDP message size, see
+https://github.com/cesanta/mongoose/issues/907 for details. If application
+uses large UDP messages, increase the `MG_IO_SIZE` limit accordingly.
+
+## Custom build
+
+It is possible to use Mongoose on an architecture that is not yet supported
+by the current codebase. In order to do so, follow these steps:
+
+1. Create a file called `mongoose_custom.h`, with defines and includes that
+are relevant to your platform. Mongoose uses `bool` type, `MG_DIRSEP` define,
+and optionally other structures like `DIR *` depending on the functionality
+you have enabled - see previous section. Below is an example:
+
+```c
+#include <dirent.h>             // For DIR *
+#include <stdbool.h>            // For bool
+#include <sys/time.h>           // For gettimeofday()
+#include <unistd.h>             // For usleep()
+#define MG_DIRSEP '/'
+#define MG_ENABLE_SOCKET 0      // Disable BSD socket API, implement your own
+```
+
+2. Add `-DMG_ARCH=MG_ARCH_CUSTOM` to your build flags.
+
+3. This step is optional. If you have disabled BSD socket API, your build is
+going to fail due to several undefined symbols. Create `mongoose_custom.c`
+and implement the following functions (take a look at `src/sock.c` for the
+reference implementation):
+
+```c
+struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *url,
+                                 mg_event_handler_t fn, void *fn_data) {
+  // implement this!
+}
+
+void mg_connect_resolved(struct mg_connection *c) {
+  // implement this!
+}
+
+
+struct mg_connection *mg_listen(struct mg_mgr *mgr, const char *url,
+                                mg_event_handler_t fn, void *fn_data) {
+  // implement this!
+}
+
+void mg_mgr_poll(struct mg_mgr *mgr, int ms) {
+  // implement this!
+}
+
+int mg_send(struct mg_connection *c, const void *buf, size_t len) {
+  // implement this!
+}
+```
+
+
 ## Minimal HTTP server
 
 This example is a simple static HTTP server that serves current directory:
@@ -238,7 +296,8 @@ static const char *s_web_root_dir = ".";
 static const char *s_listening_address = "http://localhost:8000";
 
 static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
-  if (ev == MG_EV_HTTP_MSG) mg_http_serve_dir(c, ev_data, s_web_root_dir);
+  struct mg_http_serve_opts opts = {.root_dir = s_web_root_dir};
+  if (ev == MG_EV_HTTP_MSG) mg_http_serve_dir(c, ev_data, &opts);
 }
 
 int main(int argc, char *argv[]) {
@@ -362,7 +421,7 @@ protocol-specific handler is called before user-specific handler.  It parses
 incoming data and may invoke protocol-specific events like `MG_EV_HTTP_MSG`.
 
 
-### mh\_mgr\_free()
+### mg\_mgr\_free()
 
 ```c
 void mg_mgr_free(struct mg_mgr *mgr);
@@ -468,21 +527,23 @@ by `buf`, and `len` specifies number of bytes currently stored.
 ### mg\_iobuf\_init()
 
 ```c
-void mg_iobuf_init(struct mg_iobuf *io, size_t size);
+int mg_iobuf_init(struct mg_iobuf *io, size_t size);
 ```
 
-Initialise IO buffer, allocate `size` bytes.
+Initialise IO buffer, allocate `size` bytes. Return 1 on success,
+0 on allocation failure.
 
 
 ### mg\_iobuf\_resize()
 
 ```c
-void mg_iobuf_resize(struct mg_iobuf *io, size_t size);
+int mg_iobuf_resize(struct mg_iobuf *io, size_t size);
 ```
 
 Resize IO buffer, set the new size to `size`. The `io->buf` pointer could
 change after this, for example if the buffer grows. If `size` is 0, then the
 `io->buf` is freed and set to NULL, and both `size` and `len` are set to 0.
+Return 1 on success, 0 on allocation failure.
 
 
 ### mg\_iobuf\_free()
@@ -621,34 +682,52 @@ void mg_http_write_chunk(struct mg_connection *c, const char *buf, size_t len);
 Write a chunk of data in chunked encoding format.
 
 
-### mg\_serve\_dir()
+### mg\_http\_serve\_dir()
 
 ```c
+struct mg_http_serve_opts {
+  const char *root_dir;     // Web root directory, must be non-NULL
+  const char *ssi_pattern;  // SSI filename pattern, e.g. #.shtml
+};
 void mg_http_serve_dir(struct mg_connection *, struct mg_http_message *hm,
-                       const char *path);
+                       const struct mg_http_serve_opts *opts);
 ```
 
-Serve static files using `path` as a root directory.
+Serve static files according to the given options. Note that in order to
+enable SSI, set a `-DMG_ENABLE_SSI=1` build flag.
 
 
-### mg\_serve\_file()
+### mg\_http\_serve\_file()
 
 ```c
 void mg_http_serve_file(struct mg_connection *, struct mg_http_message *hm,
-                        const char *path, const char *mimetype);
+                        const char *path, const char *mimetype,
+                        const char *extra_headers);
 ```
 
-Serve static file.
+Serve static file. Note that the `extra_headers` must end with `\r\n`. Here
+is an example call:
+
+```c
+mg_http_serve_file(c, hm, "a.png", "image/png", "AA: bb\r\nCC: dd\r\n");
+```
 
 
 ### mg\_http\_reply()
 
 ```c
-void mg_http_reply(struct mg_connection *c, int code, const char *fmt, ...);
+void mg_http_reply(struct mg_connection *c, int status_code, const char *headers,
+                   const char *body_fmt, ...);
 ```
 
-Send simple HTTP response using `printf()` semantic. 
+Send simple HTTP response using `printf()` semantic. This function formats
-`code` is HTTP response code, `fmt` is format for the HTTP body.
+response body according to a `body_fmt`, and automatically appends a correct
+`Content-Length` header. Extra headers could be passed via `headers`
+parameter.
+
+- `status_code` - an HTTP response code
+- `headers` - extra headers, default NULL. If not NULL, must end with `\r\n`
+- `fmt` - a format string for the HTTP body, in a printf semantics
 
 
 ### mg\_http\_header()
@@ -712,8 +791,34 @@ int mg_http_upload(struct mg_connection *, struct mg_http_message *hm,
                    const char *dir);
 ```
 
-Handle file upload. See file upload example.
+Handle file upload. See [file upload example](https://github.com/cesanta/mongoose/tree/master/examples/file-upload).
 
+This function  expects a series of POST requests with file data. POST requests
+should have `name` and `offset` query string parameters set:
+
+```text
+POST /whatever_uri?name=myfile.txt&offset=1234 HTTP/1.0
+Content-Length: 5
+
+hello
+```
+
+- `name` - a mandatory query string parameter, specifies a file name. It it
+  created in the `dir` directory
+- `offset` - an optional parameter, default `0`. If it set to `0`, or omitted,
+  then a file gets truncated before write. Otherwise, the body of
+  the POST request gets appended to the file
+- Server must call `mg_http_upload()` when `/whatever_uri` is hit
+
+So, the expected usage of this API function is this:
+- A client splits a file into small enough chunks, to ensure that a chunk
+  fits into the server's RAM
+- Then, each chunk is POST-ed to the server with using URI like
+  `/some_uri?name=FILENAME&offset=OFFSET`
+- Initial OFFSET is `0`, and subsequent offsets are non-zero
+- Each chunk gets appended to the file
+- When the last chunk is POSTed, upload finishes
+- POST data must not be encoded in any way, it it saved as-is
 
 ### mg\_http\_bauth()
 
@@ -756,10 +861,13 @@ Create client Websocket connection.
 ### mg\_ws\_upgrade()
 
 ```c
-void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *);
+void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *,
+                   const char *fmt, ...);
 ```
 
-Upgrade given HTTP connection to Websocket.
+Upgrade given HTTP connection to Websocket. The `fmt` is a printf-like
+format string for the extra HTTP headers returned to the client in a
+Websocket handshake. Set `fmt` to `NULL` if no extra headers needs to be passed.
 
 
 ### mg\_ws\_send()
@@ -840,10 +948,45 @@ void mg_mqtt_sub(struct mg_connection *, struct mg_str *topic);
 
 Subscribe to topic `topic`.
 
+### mg\_mqtt\_next\_sub()
+
+```c
+int mg_mqtt_next_sub(struct mg_mqtt_message *msg, struct mg_str *topic,
+                     uint8_t *qos, int pos);
+```
+
+Traverse list of subscribed topics. 
+Used to implement MQTT server when `MQTT_CMD_SUBSCRIBE` is received.
+Return next position. Initial position `pos` should be 4. Example:
+
+```c
+if (ev == MG_EV_MQTT_CMD) {
+  struct mg_mqtt_message *mm = (struct mg_mqtt_message *) ev_data;
+  if (mm->cmd == MQTT_CMD_SUBSCRIBE) {
+    int pos = 4;
+    uint8_t qos;
+    struct mg_str topic;
+    while ((pos = mg_mqtt_next_sub(mm, &topic, &qos, pos)) > 0) {
+      LOG(LL_INFO, ("SUB [%.*s]", c->id, (int) topic.len, topic.ptr));
+    }
+  }
+}
+```
+
+### mg\_mqtt\_next\_unsub()
+
+```c
+int mg_mqtt_next_unsub(struct mg_mqtt_message *msg, struct mg_str *topic,
+                       int pos);
+```
+
+Same as `mg_mqtt_next_sub()`, but for unsubscribed topics. The difference
+is that there is no QoS in unsubscribe request.
+
 
 ## TLS
 
-### struct mg\_tls\_opts
+### mg\_tls\_init()
 
 ```c
 struct mg_tls_opts {
@@ -851,20 +994,12 @@ struct mg_tls_opts {
   const char *cert;      // Certificate
   const char *certkey;   // Certificate key
   const char *ciphers;   // Cipher list
-  const char *srvname;   // If not NULL, enables server name verification
+  struct mg_str srvname; // If not empty, enables server name verification
 };
-```
-
-Describes TLS parameters
-
-
-### mg\_tls\_init()
-
-```c
 int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts);
 ```
 
-Turns on TLS on a given connection.
+Initialise TLS on a given connection.
 
 
 ## Timers
@@ -942,14 +1077,26 @@ size_t mg_file_size(const char *path);
 
 Return file size, or 0 on failure. Empty files also report 0 length.
 
-
 ### mg\_file\_write()
 
 ```c
-int mg_file_write(const char *path, const char *fmt, ...);
+bool mg_file_write(const char *path, const void *buf, size_t len);
 ```
 
-Write into a file `path` using `printf()` semantics. Return number of bytes written.
+Write data to a file, return `true` if written, `false` otherwise.
+The write is atomic, i.e. data gets written to a temporary file first,
+then `rename()-ed` to a destination file name.
+
+
+### mg\_file\_printf()
+
+```c
+int mg_file_printf(const char *path, const char *fmt, ...);
+```
+
+Write into a file `path` using `printf()` semantics.
+Return `true` on success, `false` otherwise. This function prints data to
+a temporary in-memory buffer first, then calls `mg_file_write()`.
 
 
 ### mg\_random()
@@ -1089,16 +1236,16 @@ Parse 64-bit integer value held by string `s`.
 ### mg\_aton()
 
 ```
-bool mg_aton(const char *s, uint32_t *ipaddr);
+bool mg_aton(struct mg_str str, uint32_t *ipaddr);
 ```
 
-Parse IP address held by `s` and store it in `ipaddr`. Return true on success.
+Parse IP address held by `str` and store it in `ipaddr`. Return true on success.
 
 
 ### mg\_ntoa()
 
 ```c
-char *mg_ntoa(uint32_t ipaddr, char *buf, size_t len);
+char *mg_ntoa(const struct mg_addr *, char *buf, size_t len);
 ```
 
 Stringify IP address `ipaddr` into a buffer `buf`, `len`. Return `buf`.
@@ -1128,3 +1275,12 @@ void mg_usleep(unsigned long usecs);
 ```
 
 Block for a given number of microseconds.
+
+### mg\_crc32()
+
+```c
+uint32_t mg_crc32(uint32_t crc, const uint8_t *buf, size_t len);
+```
+
+Calculate CRC32 checksum for a given buffer. An initial `crc` value should
+be `0`.

examples/captive-dns-server/Makefile

@@ -0,0 +1,11 @@
+PROG ?= example
+CFLAGS ?= -DMG_IO_SIZE=8192 -DMG_ENABLE_LINES
+
+all: $(PROG)
+	$(DEBUGGER) ./$(PROG) $(ARGS)
+
+$(PROG): main.c
+	$(CC) ../../mongoose.c -I../.. -W -Wall $(CFLAGS) -o $(PROG) main.c
+
+clean:
+	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb

examples/captive-dns-server/main.c

@@ -0,0 +1,55 @@
+// Copyright (c) 2020 Cesanta Software Limited
+// All rights reserved
+//
+// Example captive DNS server (captive portal).
+//    1. Run `make`. This builds and starts a server on port 5533
+//    2. Run `dig -t A www.google.com -4 @localhost -p 5533`
+
+#include "mongoose.h"
+
+static const char *s_listen_url = "udp://0.0.0.0:5533";
+
+// DNS answer section. We response with IP 1.2.3.4 - you can change it
+//  in the last 4 bytes of this array
+uint8_t answer[] = {
+    0xc0, 0x0c,          // Point to the name in the DNS question
+    0,    1,             // 2 bytes - record type, A
+    0,    1,             // 2 bytes - address class, INET
+    0,    0,    0, 120,  // 4 bytes - TTL
+    0,    4,             // 2 bytes - address length
+    1,    2,    3, 4     // 4 bytes - IP address
+};
+
+static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_READ) {
+    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);
+    if (n > 0) {
+      char buf[12 + n + sizeof(answer)];
+      struct mg_dns_header *h = (struct mg_dns_header *) buf;
+      memset(buf, 0, sizeof(buf));  // Clear the whole datagram
+      h->txnid = ((struct mg_dns_header *) c->recv.buf)->txnid;  // Copy tnxid
+      h->num_questions = mg_htons(1);  // We use only the 1st question
+      h->num_answers = mg_htons(1);    // And only one answer
+      h->flags = mg_htons(0x8400);     // Authoritative response
+      memcpy(buf + sizeof(*h), c->recv.buf + sizeof(*h), n);  // Copy question
+      memcpy(buf + sizeof(*h) + n, answer, sizeof(answer));   // And answer
+      mg_send(c, buf, sizeof(buf));                           // And send it!
+    }
+    mg_iobuf_delete(&c->recv, c->recv.len);
+  }
+  (void) fn_data;
+  (void) ev_data;
+}
+
+int main(void) {
+  struct mg_mgr mgr;
+
+  mg_log_set("3");                          // Set log level
+  mg_mgr_init(&mgr);                        // Initialise event manager
+  mg_listen(&mgr, s_listen_url, fn, NULL);  // Start DNS server
+  for (;;) mg_mgr_poll(&mgr, 1000);         // Event loop
+  mg_mgr_free(&mgr);
+
+  return 0;
+}

examples/complete/README.md

@@ -0,0 +1,34 @@
+# A complete device dashboard
+
+This example is a demonstration of how Mongoose Library could be integrated
+into an embedded device and provide a complete device dashbord with the
+following features:
+
+- Multiple logins with different permissions (admin and user)
+- Login screen for non-authenticated connections
+- A [preact](https://preactjs.com/)-based dashboard with multiple pages
+- Internal variables
+- A form that changes those variables
+- All changes are propagates to all connected clients
+- Live log stream
+- Live video stream
+
+
+In essense, this example is a combination of several other examples
+pulled together (multiple-logins, dashboard, live-log, video-stream).
+
+# Screenshots
+
+This is a login screen that prompts for user/password
+
+![](screenshots/login.png)
+
+# Main dashboard
+
+A main dashboard page shows internal data, live video stream, and a form
+
+![](screenshots/dashboard.png)
+
+A live log page shows live log stream coming from device
+
+![](screenshots/logs.png)

examples/complete/main.c

@@ -119,7 +119,7 @@ static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
           "Pragma: no-cache\r\nExpires: Thu, 01 Dec 1994 16:00:00 GMT\r\n"
           "Content-Type: multipart/x-mixed-replace; boundary=--foo\r\n\r\n");
     } else if (mg_http_match_uri(hm, "/api/log/static")) {
-      mg_http_serve_file(c, hm, "log.txt", "text/plain");
+      mg_http_serve_file(c, hm, "log.txt", "text/plain", "");
     } else if (mg_http_match_uri(hm, "/api/log/live")) {
       c->label[0] = 'L';  // Mark that connection as live log listener
       mg_printf(c, "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n");
@@ -129,7 +129,8 @@ static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
                            u->token);
       mg_http_printf_chunk(c, "");
     } else {
-      mg_http_serve_dir(c, ev_data, "web_root");
+      struct mg_http_serve_opts opts = {.root_dir = "web_root"};
+      mg_http_serve_dir(c, ev_data, &opts);
     }
   }
 }
@@ -146,7 +147,7 @@ static void broadcast_mjpeg_frame(struct mg_mgr *mgr) {
   char *data = mg_file_read(path);  // Read next file
   struct mg_connection *c;
   for (c = mgr->conns; c != NULL; c = c->next) {
-    if (c->label[0] != 'S') continue;      // Skip non-stream connections
+    if (c->label[0] != 'S') continue;         // Skip non-stream connections
     if (data == NULL || size == 0) continue;  // Skip on file read error
     mg_printf(c,
               "--foo\r\nContent-Type: image/jpeg\r\n"

examples/complete/web_root/axios.min.js

@@ -1,9 +1,3 @@
-/* axios v0.19.0-beta.1 | (c) 2018 by Matt Zabriskie */
+/* axios v0.21.1 | (c) 2020 by Matt Zabriskie */
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examples/dashboard/main.c

@@ -66,7 +66,8 @@ static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
       c->label[0] = 'W';  // Mark ourselves as a config watcher
       mg_printf(c, "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n");
     } else {
-      mg_http_serve_dir(c, ev_data, "web_root");
+      struct mg_http_serve_opts opts = {.root_dir = "web_root"};
+      mg_http_serve_dir(c, ev_data, &opts);
     }
   }
 }

examples/dashboard/web_root/axios.min.js

@@ -1,9 +1,3 @@
-/* axios v0.19.0-beta.1 | (c) 2018 by Matt Zabriskie */
+/* axios v0.21.1 | (c) 2020 by Matt Zabriskie */
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+!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define([],t):"object"==typeof exports?exports.axios=t():e.axios=t()}(this,function(){return function(e){function t(r){if(n[r])return n[r].exports;var o=n[r]={exports:{},id:r,loaded:!1};return e[r].call(o.exports,o,o.exports,t),o.loaded=!0,o.exports}var n={};return t.m=e,t.c=n,t.p="",t(0)}([function(e,t,n){e.exports=n(1)},function(e,t,n){"use strict";function r(e){var t=new i(e),n=s(i.prototype.request,t);return o.extend(n,i.prototype,t),o.extend(n,t),n}var o=n(2),s=n(3),i=n(4),a=n(22),u=n(10),c=r(u);c.Axios=i,c.create=function(e){return r(a(c.defaults,e))},c.Cancel=n(23),c.CancelToken=n(24),c.isCancel=n(9),c.all=function(e){return Promise.all(e)},c.spread=n(25),c.isAxiosError=n(26),e.exports=c,e.exports.default=c},function(e,t,n){"use strict";function r(e){return"[object Array]"===R.call(e)}function o(e){return"undefined"==typeof e}function s(e){return 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-	 *
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-	 * @license  MIT
-	 */
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examples/desktop-server/Makefile

@@ -1,30 +0,0 @@
-PROG ?= example
-ROOT ?= $(realpath $(CURDIR)/../..)
-DEFS ?= -DMG_ENABLE_LINES=1 -DMG_ENABLE_DIRECTORY_LISTING=1
-CFLAGS ?= -I../.. -W -Wall -DMG_ENABLE_IPV6=1 $(DEFS) $(EXTRA)
-VCFLAGS = /nologo /W3 /O2 /I../.. $(DEFS) $(EXTRA)
-VC98 = docker run --rm -e WINEDEBUG=-all -v $(ROOT):$(ROOT) -w $(CURDIR) docker.io/mdashnet/vc98
-GCC = docker run --rm -v $(ROOT):$(ROOT) -w $(CURDIR) mdashnet/cc2
-
-all: $(PROG)
-	$(DEBUGGER) ./$(PROG)
-
-$(PROG):
-	$(CC) ../../mongoose.c main.c -I../.. $(CFLAGS) $(EXTRA) -o $@
-
-mongoose_mac: $(PROG)
-	cp $(PROG) $@
-
-mongoose_linux: main.c
-	$(GCC) $(CC) ../../mongoose.c main.c $(CFLAGS) -o $@
-
-mongoose.exe: main.c
-	$(VC98) wine cl ../../mongoose.c main.c $(VCFLAGS) ws2_32.lib /Fe$@
-
-zip: mongoose.exe mongoose_linux mongoose_mac
-	rm -rf mongoose; mkdir mongoose
-	cp mongoose.exe mongoose_mac mongoose_linux mongoose
-	zip -r mongoose.zip mongoose
-
-clean:
-	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb mongoose mongoose_* mongoose.*

examples/esp32/CMakeLists.txt

@@ -0,0 +1,6 @@
+# The following lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(mongoose-esp32-example)

examples/esp32/Makefile

@@ -0,0 +1,15 @@
+THISDIR = $(realpath $(CURDIR))
+ROOTDIR = $(realpath $(CURDIR)/../..)
+
+all: example
+
+example: main/main.c Makefile
+	docker run --rm -v $(ROOTDIR):$(ROOTDIR) -w $(THISDIR) espressif/idf idf.py build
+
+COMPORT ?= /dev/cu.SLAB_USBtoUART
+ESPTOOL ?= esptool.py
+flash:
+	cd build && $(ESPTOOL) --chip esp32 -p $(COMPORT) -b 460800 --before=default_reset --after=hard_reset write_flash --flash_mode dio --flash_freq 40m --flash_size 2MB 0x8000 partition_table/partition-table.bin 0x1000 bootloader/bootloader.bin 0x100000 mongoose-esp32-example.bin
+
+clean:
+	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb mongoose mongoose_* mongoose.* build sdkconfig

examples/esp32/README.md

@@ -0,0 +1,28 @@
+# An example ESP32 application
+
+To build this application, follow these steps:
+
+1. Make sure you have Docker installed
+2. Clone whole mongoose repository on your machine:
+  ```sh
+  git clone --depth 1 https://github.com/cesanta/mongoose.git
+  ```
+3. Start command line or terminal, and go into the example's directory:
+  ```sh
+  cd mongoose/examples/esp32
+  ```
+4. Run `make`. This invokes a Docker-based build. A firmware will be built
+  in the `build/` directory:
+  ```sh
+  make
+  ```
+
+# Flashing built firmware
+
+If you have a real board to flash to, you can flash a built firmware.
+First, make sure to have `esptool.py` script installed on your workstation.
+Then, connect the board to your workstation and run the following command:
+
+```sh
+make flash COMPORT=YOUR_USB_PORT
+```

examples/esp32/main/CMakeLists.txt

@@ -0,0 +1,5 @@
+idf_component_register(SRCS "main.c"
+                            "wifi.c"
+                            "../../../mongoose.c"
+                       INCLUDE_DIRS "../../..")
+component_compile_options(-DMG_ENABLE_DIRECTORY_LISTING=1 -DMG_ENABLE_LINES)

examples/esp32/main/main.c

@@ -0,0 +1,53 @@
+// Copyright (c) 2020 Cesanta Software Limited
+// All rights reserved
+
+#include "esp_spiffs.h"
+#include "freertos/FreeRTOS.h"
+#include "mongoose.h"
+
+#define WIFI_SSID "WIFI_NETWORK"   // SET THIS!
+#define WIFI_PASS "WIFI_PASSWORD"  // SET THIS!
+#define FS_ROOT "/spiffs"
+
+// Event handler for an server (accepted) connection. Implemented endpoints:
+//    /api/stats  - return JSON object with ESP32 stats (free RAM)
+//    any other   - serve files from the filesystem
+static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_HTTP_MSG) {
+    struct mg_http_message *hm = ev_data;
+    if (mg_http_match_uri(hm, "/api/stats")) {
+      mg_http_reply(c, 200, "", "{\"ram\": %lu}\n", xPortGetFreeHeapSize());
+    } else {
+      struct mg_http_serve_opts opts = {.root_dir = FS_ROOT};
+      mg_http_serve_dir(c, hm, &opts);
+    }
+  }
+}
+
+// SPIFFS is flat, so tell Mongoose that the FS root is a directory
+// This cludge is not required for filesystems with directory support
+bool mg_is_dir(const char *path) {
+  return strcmp(path, FS_ROOT) == 0;
+}
+
+void app_main(void) {
+  // Mount filesystem
+  esp_vfs_spiffs_conf_t conf = {
+      .base_path = FS_ROOT, .max_files = 20, .format_if_mount_failed = true};
+  int res = esp_vfs_spiffs_register(&conf);
+  LOG(res == ESP_OK ? LL_INFO : LL_ERROR, ("FS %s, %d", conf.base_path, res));
+  mg_file_printf(FS_ROOT "/hello.txt", "%s", "hello from ESP");
+
+  // Setup wifi. This function is implemented in wifi.c
+  // It blocks until connected to the configured WiFi network
+  void wifi_init(const char *ssid, const char *pass);
+  wifi_init(WIFI_SSID, WIFI_PASS);
+
+  // Connected to WiFi, now start HTTP server
+  struct mg_mgr mgr;
+  mg_log_set("3");
+  mg_mgr_init(&mgr);
+  mg_http_listen(&mgr, "http://0.0.0.0:80", cb, &mgr);  // Listening server
+  LOG(LL_INFO, ("Starting Mongoose web server v%s", MG_VERSION));
+  for (;;) mg_mgr_poll(&mgr, 1000);  // Infinite event loop
+}

examples/esp32/main/wifi.c

@@ -0,0 +1,104 @@
+// Code taken from the ESP32 IDF WiFi station Example
+
+#include <string.h>
+#include "esp_event.h"
+#include "esp_log.h"
+#include "esp_system.h"
+#include "esp_wifi.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/event_groups.h"
+#include "freertos/task.h"
+#include "nvs_flash.h"
+
+#include "lwip/err.h"
+#include "lwip/sys.h"
+
+#include "mongoose.h"
+
+static EventGroupHandle_t s_wifi_event_group;
+
+/* The event group allows multiple bits for each event, but we only care about
+ * two events:
+ * - we are connected to the AP with an IP
+ * - we failed to connect after the maximum amount of retries */
+#define WIFI_CONNECTED_BIT BIT0
+#define WIFI_FAIL_BIT BIT1
+
+static int s_retry_num = 0;
+
+static void event_handler(void *arg, esp_event_base_t event_base,
+                          int32_t event_id, void *event_data) {
+  if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
+    esp_wifi_connect();
+  } else if (event_base == WIFI_EVENT &&
+             event_id == WIFI_EVENT_STA_DISCONNECTED) {
+    if (s_retry_num < 3) {
+      esp_wifi_connect();
+      s_retry_num++;
+      LOG(LL_INFO, ("retry to connect to the AP"));
+    } else {
+      xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
+    }
+    LOG(LL_ERROR, ("connect to the AP fail"));
+  } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
+    ip_event_got_ip_t *event = (ip_event_got_ip_t *) event_data;
+    LOG(LL_INFO, ("got ip:" IPSTR, IP2STR(&event->ip_info.ip)));
+    s_retry_num = 0;
+    xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
+  }
+}
+
+void wifi_init(const char *ssid, const char *pass) {
+  esp_err_t ret = nvs_flash_init();
+  if (ret == ESP_ERR_NVS_NO_FREE_PAGES ||
+      ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
+    ESP_ERROR_CHECK(nvs_flash_erase());
+    ret = nvs_flash_init();
+  }
+  ESP_ERROR_CHECK(ret);
+
+  s_wifi_event_group = xEventGroupCreate();
+
+  ESP_ERROR_CHECK(esp_netif_init());
+
+  ESP_ERROR_CHECK(esp_event_loop_create_default());
+  esp_netif_create_default_wifi_sta();
+
+  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
+  ESP_ERROR_CHECK(esp_wifi_init(&cfg));
+
+  esp_event_handler_instance_t instance_any_id;
+  esp_event_handler_instance_t instance_got_ip;
+  ESP_ERROR_CHECK(esp_event_handler_instance_register(
+      WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL, &instance_any_id));
+  ESP_ERROR_CHECK(esp_event_handler_instance_register(
+      IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL, &instance_got_ip));
+
+  wifi_config_t c = {.sta = {.threshold = {.authmode = WIFI_AUTH_WPA2_PSK},
+                             .pmf_cfg = {.capable = true, .required = false}}};
+  snprintf((char *) c.sta.ssid, sizeof(c.sta.ssid), "%s", ssid);
+  snprintf((char *) c.sta.password, sizeof(c.sta.password), "%s", pass);
+  ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
+  ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &c));
+  ESP_ERROR_CHECK(esp_wifi_start());
+  LOG(LL_DEBUG, ("wifi_init_sta finished."));
+
+  EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
+                                         WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
+                                         pdFALSE, pdFALSE, portMAX_DELAY);
+
+  if (bits & WIFI_CONNECTED_BIT) {
+    LOG(LL_INFO, ("connected to ap SSID:%s password:%s", ssid, pass));
+  } else if (bits & WIFI_FAIL_BIT) {
+    LOG(LL_ERROR, ("Failed to connect to SSID:%s, password:%s", ssid, pass));
+  } else {
+    LOG(LL_ERROR, ("UNEXPECTED EVENT"));
+  }
+
+  /* The event will not be processed after unregister */
+  ESP_ERROR_CHECK(esp_event_handler_instance_unregister(
+      IP_EVENT, IP_EVENT_STA_GOT_IP, instance_got_ip));
+  ESP_ERROR_CHECK(esp_event_handler_instance_unregister(
+      WIFI_EVENT, ESP_EVENT_ANY_ID, instance_any_id));
+  vEventGroupDelete(s_wifi_event_group);
+}

examples/esp32/partitions.csv

@@ -0,0 +1,5 @@
+# Name,   Type, SubType, Offset,  Size, Flags
+nvs,      data, nvs,     0x9000,  0x6000,
+phy_init, data, phy,     0xf000,  0x1000,
+storage,  data, spiffs,  0x10000, 0x10000,
+factory,  app,  factory, 0x100000, 1M,

examples/esp32/sdkconfig.defaults

@@ -0,0 +1,3 @@
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions.csv"
+CONFIG_PARTITION_TABLE_FILENAME="partitions.csv"

examples/esp8266/Makefile

@@ -0,0 +1,10 @@
+THISDIR = $(realpath $(CURDIR))
+ROOTDIR = $(realpath $(CURDIR)/../..)
+
+all: example
+
+example: src/main/main.c src/main/wifi.c Makefile
+	docker run --rm -v $(ROOTDIR):$(ROOTDIR) -w $(THISDIR) docker.io/mdashnet/8266 make -C src defconfig app
+
+clean:
+	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb mongoose mongoose_* mongoose.* src/build src/sdkconfig

examples/esp8266/README.md

@@ -0,0 +1,18 @@
+# An example ESP8266 application
+
+To build this application, follow these steps:
+
+1. Make sure you have Docker installed
+2. Clone whole mongoose repository on your machine:
+  ```sh
+  git clone https://github.com/cesanta/mongoose.git
+  ```
+3. Start command line or terminal, and go into the example's directory:
+  ```sh
+  cd mongoose/examples/esp8266
+  ```
+4. Run `make`. This invokes a Docker-based build. A firmware will be built
+  in the `src/build/` directory:
+  ```sh
+  make example
+  ```

examples/esp8266/src/Makefile

@@ -0,0 +1,9 @@
+#
+# This is a project Makefile. It is assumed the directory this Makefile resides in is a
+# project subdirectory.
+#
+
+PROJECT_NAME := mongoose-example
+
+include $(IDF_PATH)/make/project.mk
+

examples/esp8266/src/main/component.mk

@@ -0,0 +1,10 @@
+  #
+  # Main component makefile.
+  #
+  # This Makefile can be left empty. By default, it will take the sources in the 
+  # src/ directory, compile them and link them into lib(subdirectory_name).a 
+  # in the build directory. This behaviour is entirely configurable,
+  # please read the ESP-IDF documents if you need to do this.
+#
+
+COMPONENT_INCLUDES += ../../../../..

examples/esp8266/src/main/main.c

@@ -0,0 +1,54 @@
+// Copyright (c) 2020 Cesanta Software Limited
+// All rights reserved
+
+#include "mongoose.h"
+
+#define WIFI_SSID "WIFI_NETWORK"   // SET THIS!
+#define WIFI_PASS "WIFI_PASSWORD"  // SET THIS!
+
+#define SERVER_URL "http://0.0.0.0:80"
+#define CLIENT_URL "http://info.cern.ch"
+
+// Event handler for an server (accepted) connection
+static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_HTTP_MSG) {
+    mg_http_reply(c, 200, "", "Hello from ESP!\n");
+  }
+}
+
+// Event handler for a client connection - fetch the first web page in history
+// To enable TLS for HTTP,
+//   1. Copy "ca.pem" file to the ESP32 flash FS
+//   2. Add TLS init snippet for the connection, see examples/http-client
+static void cb2(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_CONNECT) {
+    struct mg_str s = mg_url_host(CLIENT_URL);
+    mg_printf(c, "GET / HTTP/1.0\r\nHost: %.*s\r\n\r\n", (int) s.len, s.ptr);
+  } else if (ev == MG_EV_HTTP_MSG) {
+    struct mg_http_message *hm = ev_data;  // Print HTTP response
+    LOG(LL_INFO, ("Fetched:\n%.*s", (int) hm->message.len, hm->message.ptr));
+    c->is_closing = 1;
+  }
+}
+
+// Called after we're connected to WiFi network
+static void run_mongoose(void) {
+  struct mg_mgr mgr;
+  mg_log_set("3");
+  mg_mgr_init(&mgr);
+  mg_http_listen(&mgr, SERVER_URL, cb, &mgr);    // Listening server
+  mg_http_connect(&mgr, CLIENT_URL, cb2, &mgr);  // Example client
+  LOG(LL_INFO, ("Starting Mongoose web server v%s", MG_VERSION));
+  for (;;) mg_mgr_poll(&mgr, 1000);
+  mg_mgr_free(&mgr);
+}
+
+void app_main(void) {
+  // Setup wifi. This function is implemented in wifi.c
+  // It blocks until connected to the configured WiFi network
+  void wifi_init(const char *ssid, const char *pass);
+  wifi_init(WIFI_SSID, WIFI_PASS);
+
+  // Done connecting to WiFi, now start HTTP server
+  run_mongoose();
+}

examples/esp8266/src/main/mongoose.c

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

examples/esp8266/src/main/wifi.c

@@ -0,0 +1,86 @@
+#include <string.h>
+#include "esp_event.h"
+#include "esp_log.h"
+#include "esp_system.h"
+#include "esp_wifi.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/event_groups.h"
+#include "freertos/task.h"
+#include "nvs_flash.h"
+
+#include "lwip/err.h"
+#include "lwip/sys.h"
+
+#include "mongoose.h"
+
+static EventGroupHandle_t s_wifi_event_group;
+
+/* The event group allows multiple bits for each event, but we only care about
+ * two events:
+ * - we are connected to the AP with an IP
+ * - we failed to connect after the maximum amount of retries */
+#define WIFI_CONNECTED_BIT BIT0
+#define WIFI_FAIL_BIT BIT1
+
+static int s_retry_num = 0;
+
+static void event_handler(void *arg, esp_event_base_t event_base,
+                          int32_t event_id, void *event_data) {
+  if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
+    esp_wifi_connect();
+  } else if (event_base == WIFI_EVENT &&
+             event_id == WIFI_EVENT_STA_DISCONNECTED) {
+    if (s_retry_num < 3) {
+      esp_wifi_connect();
+      s_retry_num++;
+      LOG(LL_DEBUG, ("retry to connect to the AP"));
+    } else {
+      xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
+    }
+    LOG(LL_ERROR, ("connect to the AP fail"));
+  } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
+    ip_event_got_ip_t *event = (ip_event_got_ip_t *) event_data;
+    LOG(LL_INFO, ("got ip:%s", ip4addr_ntoa(&event->ip_info.ip)));
+    s_retry_num = 0;
+    xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
+  }
+}
+
+void wifi_init(const char *ssid, const char *pass) {
+  s_wifi_event_group = xEventGroupCreate();
+  tcpip_adapter_init();
+  ESP_ERROR_CHECK(esp_event_loop_create_default());
+  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
+  ESP_ERROR_CHECK(esp_wifi_init(&cfg));
+  ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID,
+                                             &event_handler, NULL));
+  ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP,
+                                             &event_handler, NULL));
+
+  wifi_config_t c = {};
+  snprintf((char *) c.sta.ssid, sizeof(c.sta.ssid), "%s", ssid);
+  snprintf((char *) c.sta.password, sizeof(c.sta.password), "%s", pass);
+  if (pass != NULL && pass[0] != '\0') {
+    c.sta.threshold.authmode = WIFI_AUTH_WPA2_PSK;
+  }
+  ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
+  ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &c));
+  ESP_ERROR_CHECK(esp_wifi_start());
+  EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
+                                         WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
+                                         pdFALSE, pdFALSE, portMAX_DELAY);
+
+  if (bits & WIFI_CONNECTED_BIT) {
+    LOG(LL_INFO, ("connected to ap SSID:%s password:%s", ssid, pass));
+  } else if (bits & WIFI_FAIL_BIT) {
+    LOG(LL_ERROR, ("Failed to connect to SSID:%s, password:%s", ssid, pass));
+  } else {
+    LOG(LL_ERROR, ("UNEXPECTED EVENT"));
+  }
+
+  ESP_ERROR_CHECK(esp_event_handler_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP,
+                                               &event_handler));
+  ESP_ERROR_CHECK(esp_event_handler_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID,
+                                               &event_handler));
+  vEventGroupDelete(s_wifi_event_group);
+}

examples/file-upload/main.c

@@ -12,7 +12,8 @@ static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
     if (mg_http_match_uri(hm, "/upload")) {
       mg_http_upload(c, hm, "/tmp");
     } else {
-      mg_http_serve_dir(c, ev_data, "web_root");
+      struct mg_http_serve_opts opts = {.root_dir = "web_root"};
+      mg_http_serve_dir(c, ev_data, &opts);
     }
   }
 }

examples/http-client/Makefile

@@ -1,11 +1,14 @@
 PROG ?= example
-ARGS ?= http://www.ladyada.net/
+CFLAGS ?= -DMG_ENABLE_LINES $(EXTRA)
-MBEDTLS_DIR ?=
 
-ifeq "$(MBEDTLS_DIR)" ""
+ifneq ($(MBEDTLS),)
-else
+CFLAGS += -DMG_ENABLE_MBEDTLS=1 -I$(MBEDTLS)/include -I/usr/include
-CFLAGS += -DMG_ENABLE_MBEDTLS=1 -I$(MBEDTLS_DIR)/include -I/usr/include
+CFLAGS += -L$(MBEDTLS)/lib -lmbedtls -lmbedcrypto -lmbedx509
-CFLAGS += -L$(MBEDTLS_DIR)/lib -lmbedtls -lmbedcrypto -lmbedx509
+endif
+
+ifneq ($(OPENSSL),)
+CFLAGS += -DMG_ENABLE_OPENSSL=1 -I$(OPENSSL)/include
+CFLAGS += -L$(OPENSSL)/lib -lssl -lcrypto
 endif
 
 all: $(PROG)

examples/http-client/main.c

@@ -1,46 +1,56 @@
-// Copyright (c) 2020 Cesanta Software Limited
+// Copyright (c) 2021 Cesanta Software Limited
 // All rights reserved
 //
-// Example HTTP client. Usage:
+// Example HTTP client. Connect to `s_url`, send request, wait for a response,
-//    make
+// print the response and exit.
-//    ./example http://www.ladyada.net/
+// You can change `s_url` from the command line by executing: ./example YOUR_URL
 //
 // To enable SSL/TLS for this client, build it like this:
-//    make MBEDTLS_DIR=/path/to/your/mbedtls/installation
+//    make MBEDTLS=/path/to/your/mbedtls/installation
+//    make OPENSSL=/path/to/your/openssl/installation
 
 #include "mongoose.h"
 
+// The very first web page in history. You can replace it from command line
+static const char *s_url = "http://info.cern.ch";
+
 // Print HTTP response and signal that we're done
 static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
-  if (ev == MG_EV_HTTP_MSG) {
+  if (ev == MG_EV_CONNECT) {
+    // Connected to server. Extract host name from URL
+    struct mg_str host = mg_url_host(s_url);
+
+    // If s_url is https://, tell client connection to use TLS
+    if (mg_url_is_ssl(s_url)) {
+      struct mg_tls_opts opts = {.ca = "ca.pem", .srvname = host};
+      mg_tls_init(c, &opts);
+    }
+
+    // Send request
+    mg_printf(c,
+              "GET %s HTTP/1.0\r\n"
+              "Host: %.*s\r\n"
+              "\r\n",
+              mg_url_uri(s_url), (int) host.len, host.ptr);
+  } else if (ev == MG_EV_HTTP_MSG) {
+    // Response is received. Print it
     struct mg_http_message *hm = (struct mg_http_message *) ev_data;
     printf("%.*s", (int) hm->message.len, hm->message.ptr);
-    c->is_closing = 1;
+    c->is_closing = 1;         // Tell mongoose to close this connection
-    *(bool *) fn_data = true;
+    *(bool *) fn_data = true;  // Tell event loop to stop
+  } else if (ev == MG_EV_ERROR) {
+    *(bool *) fn_data = true;  // Error, tell event loop to stop
   }
 }
 
 int main(int argc, char *argv[]) {
-  struct mg_mgr mgr;                            // Event manager
+  struct mg_mgr mgr;                        // Event manager
-  mg_mgr_init(&mgr);                            // Initialise event manager
+  bool done = false;                        // Event handler flips it to true
-
+  if (argc > 1) s_url = argv[1];            // Use URL from command line
-  if (argc != 2) {
+  mg_log_set("3");                          // Set to 0 to disable debug
-    fprintf(stderr, "Usage: %s URL\n", argv[0]);  // Print error
+  mg_mgr_init(&mgr);                        // Initialise event manager
-  } else {
+  mg_http_connect(&mgr, s_url, fn, &done);  // Create client connection
-    bool done = false;  // Event handler flips it to true
+  while (!done) mg_mgr_poll(&mgr, 1000);    // Infinite event loop
-    struct mg_connection *c = mg_http_connect(&mgr, argv[1], fn, &done);
+  mg_mgr_free(&mgr);                        // Free resources
-    if (c != NULL) {
-      mg_printf(c, "GET %s HTTP/1.0\r\n\r\n", mg_url_uri(argv[1]));
-      // If target URL is SSL/TLS, command client connection to use TLS
-      if (mg_url_is_ssl(argv[1])) {
-        struct mg_tls_opts opts = {.ca = "ca.pem"};
-        mg_tls_init(c, &opts);
-      }
-    }
-    while (done == false) mg_mgr_poll(&mgr, 1000);  // Event loop
-  }
-
-  mg_mgr_free(&mgr);
-
   return 0;
 }

examples/http-proxy-client/Makefile

@@ -0,0 +1,19 @@
+PROG ?= example
+ARGS ?= http://www.ladyada.net/
+MBEDTLS_DIR ?=
+
+ifeq "$(MBEDTLS_DIR)" ""
+else
+CFLAGS += -DMG_ENABLE_MBEDTLS=1 -I$(MBEDTLS_DIR)/include -I/usr/include
+CFLAGS += -L$(MBEDTLS_DIR)/lib -lmbedtls -lmbedcrypto -lmbedx509
+endif
+
+all: $(PROG)
+	$(DEBUGGER) ./$(PROG) $(ARGS)
+
+
+$(PROG): main.c
+	$(CC) ../../mongoose.c -I../.. -W -Wall $(CFLAGS) -o $(PROG) main.c
+
+clean:
+	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb

examples/http-proxy-client/ca.pem

@@ -0,0 +1,507 @@
+Subject: O=Digital Signature Trust Co., CN=DST Root CA X3
+Not Before: Sep 30 21:12:19 2000 GMT
+Not After : Sep 30 14:01:15 2021 GMT
+-----BEGIN CERTIFICATE-----
+MIIDSjCCAjKgAwIBAgIQRK+wgNajJ7qJMDmGLvhAazANBgkqhkiG9w0BAQUFADA/
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+Ob8VZRzI9neWagqNdwvYkQsEjgfbKbYK7p2CNTUQ
+-----END CERTIFICATE-----
+
+Subject: C=IE, O=Baltimore, OU=CyberTrust, CN=Baltimore CyberTrust Root
+Not Before: May 12 18:46:00 2000 GMT
+Not After : May 12 23:59:00 2025 GMT
+-----BEGIN CERTIFICATE-----
+MIIDdzCCAl+gAwIBAgIEAgAAuTANBgkqhkiG9w0BAQUFADBaMQswCQYDVQQGEwJJ
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+R9I4LtD+gdwyah617jzV/OeBHRnDJELqYzmp
+-----END CERTIFICATE-----
+
+Subject: C=US, O=GeoTrust Inc., CN=GeoTrust Global CA
+Not Before: May 21 04:00:00 2002 GMT
+Not After : May 21 04:00:00 2022 GMT
+-----BEGIN CERTIFICATE-----
+MIIDVDCCAjygAwIBAgIDAjRWMA0GCSqGSIb3DQEBBQUAMEIxCzAJBgNVBAYTAlVT
+MRYwFAYDVQQKEw1HZW9UcnVzdCBJbmMuMRswGQYDVQQDExJHZW9UcnVzdCBHbG9i
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+5fEWCRE11azbJHFwLJhWC9kXtNHjUStedejV0NxPNO3CBWaAocvmMw==
+-----END CERTIFICATE-----
+
+Subject: C=US, O=Symantec Corporation, OU=Symantec Trust Network, CN=Symantec Class 3 ECC 256 bit SSL CA - G2
+Not Before: May 12 00:00:00 2015 GMT
+Not After : May 11 23:59:59 2025 GMT
+-----BEGIN CERTIFICATE-----
+MIIEajCCA1KgAwIBAgIQP5KHvp0dpKN6nfYoLndaxDANBgkqhkiG9w0BAQsFADCB
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+dHN9umAvlU313g0IgJrjsQ2nIdf9dsdP+6lrmP7s
+-----END CERTIFICATE-----
+
+Subject: C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=(c) 2006 VeriSign, Inc. - For authorized use only, CN=VeriSign Class 3 Public Primary Certification Authority - G5
+Not Before: Nov  8 00:00:00 2006 GMT
+Not After : Jul 16 23:59:59 2036 GMT
+-----BEGIN CERTIFICATE-----
+MIIE0zCCA7ugAwIBAgIQGNrRniZ96LtKIVjNzGs7SjANBgkqhkiG9w0BAQUFADCB
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+-----END CERTIFICATE-----
+
+Subject: C=US, O=The Go Daddy Group, Inc., OU=Go Daddy Class 2 Certification Authority
+Not Before: Jun 29 17:06:20 2004 GMT
+Not After : Jun 29 17:06:20 2034 GMT
+-----BEGIN CERTIFICATE-----
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+ReYNnyicsbkqWletNw+vHX/bvZ8=
+-----END CERTIFICATE-----
+
+# Note: Amazon ATS endpoint uses this (2018/12/18)
+Subject: C=US, O=Starfield Technologies, Inc., OU=Starfield Class 2 Certification Authority
+Not Before: Jun 29 17:39:16 2004 GMT
+Not After : Jun 29 17:39:16 2034 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Not Before: Sep  1 00:00:00 2009 GMT
+Not After : Dec 31 23:59:59 2037 GMT
+Subject: C=US, ST=Arizona, L=Scottsdale, O=Starfield Technologies, Inc., CN=Starfield Root Certificate Authority - G2
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Subject: C=US, ST=Arizona, L=Scottsdale, O=Starfield Technologies, Inc., CN=Starfield Services Root Certificate Authority - G2
+Not Before: Sep  1 00:00:00 2009 GMT
+Not After : Dec 31 23:59:59 2037 GMT
+-----BEGIN CERTIFICATE-----
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+sSi6
+-----END CERTIFICATE-----
+
+Subject: OU=GlobalSign Root CA - R2, O=GlobalSign, CN=GlobalSign
+Not Before: Dec 15 08:00:00 2006 GMT
+Not After : Dec 15 08:00:00 2021 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Subject: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert High Assurance EV Root CA
+Not Before: Nov 10 00:00:00 2006 GMT
+Not After : Nov 10 00:00:00 2031 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Subject: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root CA
+Not Before: Nov 10 00:00:00 2006 GMT
+Not After : Nov 10 00:00:00 2031 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# *.azure-devices.de use this root.
+Subject: C = DE, O = D-Trust GmbH, CN = D-TRUST Root Class 3 CA 2 2009
+Not Before: Nov  5 08:35:58 2009 GMT
+Not After : Nov  5 08:35:58 2029 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# https://www.amazontrust.com/repository/
+Subject: C = US, O = Amazon, CN = Amazon Root CA 1
+Not Before: May 26 00:00:00 2015 GMT
+Not After : Jan 17 00:00:00 2038 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Subject: C = US, O = Amazon, CN = Amazon Root CA 2
+Not Before: May 26 00:00:00 2015 GMT
+Not After : May 26 00:00:00 2040 GMT
+-----BEGIN CERTIFICATE-----
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+btmlyTrIQRNg91CMFa6ybRoVGld45pIq2WWQgj9sAq+uEjonljYE1x2igGOpm/Hl
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+fUwPfHJ5elnNXkoOrJupmHN5fLT0zLm4BwyydFy4x2+IoZCn9Kr5v2c69BoVYh63
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+9jVlpNMKVv/1F2Rs76giJUmTtt8AF9pYfl3uxRuw0dFfIRDH+fO6AgonB8Xx1sfT
+4PsJYGw=
+-----END CERTIFICATE-----
+
+Not Before: May 26 00:00:00 2015 GMT
+Not After : May 26 00:00:00 2040 GMT
+Subject: C = US, O = Amazon, CN = Amazon Root CA 3
+-----BEGIN CERTIFICATE-----
+MIIBtjCCAVugAwIBAgITBmyf1XSXNmY/Owua2eiedgPySjAKBggqhkjOPQQDAjA5
+MQswCQYDVQQGEwJVUzEPMA0GA1UEChMGQW1hem9uMRkwFwYDVQQDExBBbWF6b24g
+Um9vdCBDQSAzMB4XDTE1MDUyNjAwMDAwMFoXDTQwMDUyNjAwMDAwMFowOTELMAkG
+A1UEBhMCVVMxDzANBgNVBAoTBkFtYXpvbjEZMBcGA1UEAxMQQW1hem9uIFJvb3Qg
+Q0EgMzBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABCmXp8ZBf8ANm+gBG1bG8lKl
+ui2yEujSLtf6ycXYqm0fc4E7O5hrOXwzpcVOho6AF2hiRVd9RFgdszflZwjrZt6j
+QjBAMA8GA1UdEwEB/wQFMAMBAf8wDgYDVR0PAQH/BAQDAgGGMB0GA1UdDgQWBBSr
+ttvXBp43rDCGB5Fwx5zEGbF4wDAKBggqhkjOPQQDAgNJADBGAiEA4IWSoxe3jfkr
+BqWTrBqYaGFy+uGh0PsceGCmQ5nFuMQCIQCcAu/xlJyzlvnrxir4tiz+OpAUFteM
+YyRIHN8wfdVoOw==
+-----END CERTIFICATE-----
+
+Not Before: May 26 00:00:00 2015 GMT
+Not After : May 26 00:00:00 2040 GMT
+Subject: C = US, O = Amazon, CN = Amazon Root CA 4
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+
+Not Before: Nov 10 00:00:00 2006 GMT
+Not After : Nov 10 00:00:00 2031 GMT
+Subject: C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert Global Root CA
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+
+Not Before: Nov 13 00:00:00 2012 GMT
+Not After : Jan 19 03:14:07 2038 GMT
+Subject: OU = GlobalSign ECC Root CA - R4, O = GlobalSign, CN = GlobalSign
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+
+Not Before: Nov  1 00:00:42 2018 GMT
+Not After : Nov  1 00:00:42 2042 GMT
+Subject: C = US, O = Google Trust Services LLC, CN = GTS LTSR
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

examples/http-proxy-client/main.c

@@ -0,0 +1,64 @@
+// Copyright (c) 2020 Cesanta Software Limited
+// All rights reserved
+//
+// Example HTTP client that uses a proxy server. Usage:
+//    make
+//    ./example PROXY:PORT http://www.ladyada.net
+//
+// To enable SSL/TLS for this client, build it like this:
+//    make MBEDTLS_DIR=/path/to/your/mbedtls/installation
+
+#include "mongoose.h"
+
+// Print HTTP response and signal that we're done
+static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  const char *url = fn_data;
+  static bool connected;
+  if (ev == MG_EV_HTTP_MSG) {
+    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    printf("%.*s", (int) hm->message.len, hm->message.ptr);
+    exit(EXIT_SUCCESS);
+  } else if (ev == MG_EV_CONNECT) {
+    // Proxy TCP connection established. Send CONNECT request
+    struct mg_str host = mg_url_host(url);
+    // c->is_hexdumping = 1;
+    mg_printf(c, "CONNECT %.*s:%hu HTTP/1.1\r\nHost: %.*s:%hu\r\n\r\n",
+              (int) host.len, host.ptr, mg_url_port(url), (int) host.len,
+              host.ptr, mg_url_port(url));
+    // If target URL is SSL/TLS, command client connection to use TLS
+    if (mg_url_is_ssl(url)) {
+      struct mg_tls_opts opts = {.ca = "ca.pem"};
+      mg_tls_init(c, &opts);
+    }
+  } else if (!connected && ev == MG_EV_READ) {
+    struct mg_http_message hm;
+    int n = mg_http_parse((char *) c->recv.buf, c->recv.len, &hm);
+    if (n > 0) {
+      struct mg_str host = mg_url_host(url);
+      // CONNECT response - tunnel is established
+      connected = true;
+      LOG(LL_DEBUG,
+          ("Connected to proxy, status: %.*s", (int) hm.uri.len, hm.uri.ptr));
+      mg_iobuf_delete(&c->recv, n);
+      // Send request to the target server
+      mg_printf(c, "GET / HTTP/1.0\r\nHost: %.*s\r\n\r\n", (int) host.len,
+                host.ptr);
+    }
+  }
+}
+
+int main(int argc, char *argv[]) {
+  struct mg_mgr mgr;
+
+  if (argc != 3) {
+    fprintf(stderr, "Usage: %s PROXY_URL URL\n", argv[0]);
+    return EXIT_FAILURE;
+  }
+
+  mg_mgr_init(&mgr);                            // Initialise event manager
+  mg_http_connect(&mgr, argv[1], fn, argv[2]);  // Connect to the proxy
+  for (;;) mg_mgr_poll(&mgr, 1000);             // Event loop
+  mg_mgr_free(&mgr);
+
+  return 0;
+}

examples/http-restful-server/Makefile

@@ -1,5 +1,11 @@
 PROG ?= example
 
+ifeq "$(MBEDTLS_DIR)" ""
+else
+CFLAGS += -DMG_ENABLE_MBEDTLS=1 -I$(MBEDTLS_DIR)/include -I/usr/include
+CFLAGS += -L$(MBEDTLS_DIR)/lib -lmbedtls -lmbedcrypto -lmbedx509
+endif
+
 all: $(PROG)
 	$(DEBUGGER) ./$(PROG) $(ARGS)
 

examples/http-restful-server/ca.pem

@@ -0,0 +1,43 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number:
+            11:2a:0e:3c:6a:8c:85:ff:6e:6a:bc:db:95:51:70:ce:b4:30:78:c7
+        Signature Algorithm: ecdsa-with-SHA256
+        Issuer: C = IE, L = Dublin, O = Cesanta, CN = Test Root
+        Validity
+            Not Before: May  9 21:51:44 2020 GMT
+            Not After : May  9 21:51:44 2050 GMT
+        Subject: C = IE, L = Dublin, O = Cesanta, CN = Test Root
+        Subject Public Key Info:
+            Public Key Algorithm: id-ecPublicKey
+                Public-Key: (256 bit)
+                pub:
+                    04:2c:ab:d1:02:66:24:96:d7:12:3e:09:50:4f:f1:
+                    50:ee:51:e8:55:03:5e:ba:b1:1d:98:b2:72:79:27:
+                    a8:1b:31:0d:5d:50:21:ff:42:f2:da:74:17:5e:53:
+                    b2:65:41:c1:fc:84:de:4a:11:b9:8c:f4:19:d9:c4:
+                    ca:2b:ea:eb:2c
+                ASN1 OID: prime256v1
+                NIST CURVE: P-256
+        X509v3 extensions:
+            X509v3 Basic Constraints: 
+                CA:TRUE
+            X509v3 Key Usage: 
+                Digital Signature, Key Encipherment, Key Agreement, Certificate Sign, CRL Sign
+    Signature Algorithm: ecdsa-with-SHA256
+         30:46:02:21:00:9c:71:6c:00:8c:06:41:0c:91:2f:cd:41:d3:
+         87:47:e9:df:3a:22:ad:25:7c:bf:0e:2b:39:dd:7a:0c:4e:68:
+         1d:02:21:00:8f:c1:22:30:10:61:5d:51:10:ea:08:2d:02:63:
+         67:67:32:b5:06:63:96:57:bb:78:47:0a:88:d9:19:2e:f3:be
+-----BEGIN CERTIFICATE-----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==
+-----END CERTIFICATE-----

examples/http-restful-server/main.c

@@ -1,25 +1,41 @@
 // Copyright (c) 2020 Cesanta Software Limited
 // All rights reserved
+//
+// HTTP server example. This server serves both static and dynamic content.
+// It implements the following endpoints:
+//    /api/f1 - respond with JSON string {"result": 123}
+//    /api/f2/:id - wildcard example, respond with JSON string {"result": "URI"}
+//    any other URI serves static files from s_web_directory
+//
+// To enable SSL/TLS (using self-signed certificates in PEM files),
+//    1. Change s_listen_on from http:// to https://
+//    2. make MBEDTLS_DIR=/path/to/your/mbedtls/installation
+//    3. curl -k https://127.0.0.1:8000
 
 #include "mongoose.h"
 
-static const char *s_listen_on = "http://localhost:8000";
+static const char *s_listen_on = "http://0.0.0.0:8000";
 static const char *s_web_directory = ".";
 
-// This RESTful server implements the following endpoints:
-//   /api/f1 - respond with JSON string {"result": 123}
-//   /api/f2/:id - wildcard example, respond with JSON string {"result": "URI"}
-//   any other URI serves static files from s_web_directory
 static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
-  if (ev == MG_EV_HTTP_MSG) {
+  if (ev == MG_EV_ACCEPT && mg_url_is_ssl(s_listen_on)) {
+    // If s_listen_on URL is https://, tell listening connection to use TLS
+    struct mg_tls_opts opts = {
+        //.ca = "ca.pem",         // Uncomment to enable two-way SSL
+        .cert = "server.pem",     // Certificate PEM file
+        .certkey = "server.pem",  // This pem conains both cert and key
+    };
+    mg_tls_init(c, &opts);
+  } else if (ev == MG_EV_HTTP_MSG) {
     struct mg_http_message *hm = (struct mg_http_message *) ev_data;
     if (mg_http_match_uri(hm, "/api/f1")) {
-      mg_http_reply(c, 200, "{\"result\": %d}\n", 123);  // Serve REST response
+      mg_http_reply(c, 200, "", "{\"result\": %d}\n", 123);  // Serve REST
     } else if (mg_http_match_uri(hm, "/api/f2/*")) {
-      mg_http_reply(c, 200, "{\"result\": \"%.*s\"}\n", (int) hm->uri.len,
+      mg_http_reply(c, 200, "", "{\"result\": \"%.*s\"}\n", (int) hm->uri.len,
                     hm->uri.ptr);
     } else {
-      mg_http_serve_dir(c, ev_data, s_web_directory);  // Serve static files
+      struct mg_http_serve_opts opts = {.root_dir = s_web_directory};
+      mg_http_serve_dir(c, ev_data, &opts);
     }
   }
   (void) fn_data;
@@ -27,6 +43,7 @@ static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
 
 int main(void) {
   struct mg_mgr mgr;                            // Event manager
+  mg_log_set("2");                              // Set to 3 to enable debug
   mg_mgr_init(&mgr);                            // Initialise event manager
   mg_http_listen(&mgr, s_listen_on, fn, NULL);  // Create HTTP listener
   for (;;) mg_mgr_poll(&mgr, 1000);             // Infinite event loop

examples/http-restful-server/server.pem

@@ -0,0 +1,50 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number:
+            6e:73:28:55:df:13:b5:61:f5:4f:4f:5d:00:d9:0a:d8:b5:3a:21:4b
+        Signature Algorithm: ecdsa-with-SHA256
+        Issuer: C = IE, L = Dublin, O = Cesanta, CN = Test Root
+        Validity
+            Not Before: May  9 21:51:49 2020 GMT
+            Not After : May  9 21:51:49 2030 GMT
+        Subject: CN = server
+        Subject Public Key Info:
+            Public Key Algorithm: id-ecPublicKey
+                Public-Key: (256 bit)
+                pub:
+                    04:92:e0:46:9c:89:c3:37:a9:74:eb:35:55:43:55:
+                    5c:ac:eb:c7:e4:50:ee:f4:c0:ba:17:02:5c:d9:ed:
+                    b4:d4:ff:21:12:9a:b4:43:f4:89:4b:69:e4:6d:2b:
+                    96:1f:fc:01:4d:30:5a:79:73:76:ba:19:41:cc:c5:
+                    16:2b:bf:74:28
+                ASN1 OID: prime256v1
+                NIST CURVE: P-256
+        X509v3 extensions:
+            X509v3 Basic Constraints: 
+                CA:FALSE
+            X509v3 Key Usage: 
+                Digital Signature, Key Encipherment, Key Agreement
+            X509v3 Extended Key Usage: 
+                TLS Web Server Authentication
+    Signature Algorithm: ecdsa-with-SHA256
+         30:46:02:21:00:fa:3a:c7:1e:cb:8c:27:59:41:8d:77:dd:7b:
+         cb:8c:08:15:16:b9:6e:70:e6:47:38:d1:55:42:e0:d7:66:c8:
+         f0:02:21:00:cc:70:4d:96:28:00:d3:c7:39:53:74:b2:49:87:
+         27:92:1b:ab:1a:0e:74:06:59:42:23:47:98:43:d8:20:a7:fa
+-----BEGIN CERTIFICATE-----
+MIIBhzCCASygAwIBAgIUbnMoVd8TtWH1T09dANkK2LU6IUswCgYIKoZIzj0EAwIw
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+BllCI0eYQ9ggp/o=
+-----END CERTIFICATE-----
+-----BEGIN PRIVATE KEY-----
+MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQglNni0t9Dg9icgG8w
+kbfxWSS+TuNgbtNybIQXcm3NHpmhRANCAASS4EacicM3qXTrNVVDVVys68fkUO70
+wLoXAlzZ7bTU/yESmrRD9IlLaeRtK5Yf/AFNMFp5c3a6GUHMxRYrv3Qo
+-----END PRIVATE KEY-----

examples/http-reverse-proxy/Makefile

@@ -0,0 +1,19 @@
+PROG ?= example
+CFLAGS ?= -DMG_IO_SIZE=8192
+MBEDTLS_DIR ?=
+
+ifeq "$(MBEDTLS_DIR)" ""
+else
+CFLAGS += -DMG_ENABLE_MBEDTLS=1 -I$(MBEDTLS_DIR)/include -I/usr/include
+CFLAGS += -L$(MBEDTLS_DIR)/lib -lmbedtls -lmbedcrypto -lmbedx509
+endif
+
+all: $(PROG)
+	$(DEBUGGER) ./$(PROG) $(ARGS)
+
+
+$(PROG): main.c
+	$(CC) ../../mongoose.c -I../.. -W -Wall $(CFLAGS) -o $(PROG) main.c
+
+clean:
+	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb

examples/http-reverse-proxy/ca.pem

@@ -0,0 +1,507 @@
+Subject: O=Digital Signature Trust Co., CN=DST Root CA X3
+Not Before: Sep 30 21:12:19 2000 GMT
+Not After : Sep 30 14:01:15 2021 GMT
+-----BEGIN CERTIFICATE-----
+MIIDSjCCAjKgAwIBAgIQRK+wgNajJ7qJMDmGLvhAazANBgkqhkiG9w0BAQUFADA/
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+Ob8VZRzI9neWagqNdwvYkQsEjgfbKbYK7p2CNTUQ
+-----END CERTIFICATE-----
+
+Subject: C=IE, O=Baltimore, OU=CyberTrust, CN=Baltimore CyberTrust Root
+Not Before: May 12 18:46:00 2000 GMT
+Not After : May 12 23:59:00 2025 GMT
+-----BEGIN CERTIFICATE-----
+MIIDdzCCAl+gAwIBAgIEAgAAuTANBgkqhkiG9w0BAQUFADBaMQswCQYDVQQGEwJJ
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+R9I4LtD+gdwyah617jzV/OeBHRnDJELqYzmp
+-----END CERTIFICATE-----
+
+Subject: C=US, O=GeoTrust Inc., CN=GeoTrust Global CA
+Not Before: May 21 04:00:00 2002 GMT
+Not After : May 21 04:00:00 2022 GMT
+-----BEGIN CERTIFICATE-----
+MIIDVDCCAjygAwIBAgIDAjRWMA0GCSqGSIb3DQEBBQUAMEIxCzAJBgNVBAYTAlVT
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+5fEWCRE11azbJHFwLJhWC9kXtNHjUStedejV0NxPNO3CBWaAocvmMw==
+-----END CERTIFICATE-----
+
+Subject: C=US, O=Symantec Corporation, OU=Symantec Trust Network, CN=Symantec Class 3 ECC 256 bit SSL CA - G2
+Not Before: May 12 00:00:00 2015 GMT
+Not After : May 11 23:59:59 2025 GMT
+-----BEGIN CERTIFICATE-----
+MIIEajCCA1KgAwIBAgIQP5KHvp0dpKN6nfYoLndaxDANBgkqhkiG9w0BAQsFADCB
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+-----END CERTIFICATE-----
+
+Subject: C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=(c) 2006 VeriSign, Inc. - For authorized use only, CN=VeriSign Class 3 Public Primary Certification Authority - G5
+Not Before: Nov  8 00:00:00 2006 GMT
+Not After : Jul 16 23:59:59 2036 GMT
+-----BEGIN CERTIFICATE-----
+MIIE0zCCA7ugAwIBAgIQGNrRniZ96LtKIVjNzGs7SjANBgkqhkiG9w0BAQUFADCB
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+-----END CERTIFICATE-----
+
+Subject: C=US, O=The Go Daddy Group, Inc., OU=Go Daddy Class 2 Certification Authority
+Not Before: Jun 29 17:06:20 2004 GMT
+Not After : Jun 29 17:06:20 2034 GMT
+-----BEGIN CERTIFICATE-----
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+ReYNnyicsbkqWletNw+vHX/bvZ8=
+-----END CERTIFICATE-----
+
+# Note: Amazon ATS endpoint uses this (2018/12/18)
+Subject: C=US, O=Starfield Technologies, Inc., OU=Starfield Class 2 Certification Authority
+Not Before: Jun 29 17:39:16 2004 GMT
+Not After : Jun 29 17:39:16 2034 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Not Before: Sep  1 00:00:00 2009 GMT
+Not After : Dec 31 23:59:59 2037 GMT
+Subject: C=US, ST=Arizona, L=Scottsdale, O=Starfield Technologies, Inc., CN=Starfield Root Certificate Authority - G2
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Subject: C=US, ST=Arizona, L=Scottsdale, O=Starfield Technologies, Inc., CN=Starfield Services Root Certificate Authority - G2
+Not Before: Sep  1 00:00:00 2009 GMT
+Not After : Dec 31 23:59:59 2037 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Subject: OU=GlobalSign Root CA - R2, O=GlobalSign, CN=GlobalSign
+Not Before: Dec 15 08:00:00 2006 GMT
+Not After : Dec 15 08:00:00 2021 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Subject: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert High Assurance EV Root CA
+Not Before: Nov 10 00:00:00 2006 GMT
+Not After : Nov 10 00:00:00 2031 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Subject: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root CA
+Not Before: Nov 10 00:00:00 2006 GMT
+Not After : Nov 10 00:00:00 2031 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# *.azure-devices.de use this root.
+Subject: C = DE, O = D-Trust GmbH, CN = D-TRUST Root Class 3 CA 2 2009
+Not Before: Nov  5 08:35:58 2009 GMT
+Not After : Nov  5 08:35:58 2029 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# https://www.amazontrust.com/repository/
+Subject: C = US, O = Amazon, CN = Amazon Root CA 1
+Not Before: May 26 00:00:00 2015 GMT
+Not After : Jan 17 00:00:00 2038 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Subject: C = US, O = Amazon, CN = Amazon Root CA 2
+Not Before: May 26 00:00:00 2015 GMT
+Not After : May 26 00:00:00 2040 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Not Before: May 26 00:00:00 2015 GMT
+Not After : May 26 00:00:00 2040 GMT
+Subject: C = US, O = Amazon, CN = Amazon Root CA 3
+-----BEGIN CERTIFICATE-----
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+YyRIHN8wfdVoOw==
+-----END CERTIFICATE-----
+
+Not Before: May 26 00:00:00 2015 GMT
+Not After : May 26 00:00:00 2040 GMT
+Subject: C = US, O = Amazon, CN = Amazon Root CA 4
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Not Before: Nov 10 00:00:00 2006 GMT
+Not After : Nov 10 00:00:00 2031 GMT
+Subject: C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert Global Root CA
+-----BEGIN CERTIFICATE-----
+MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBh
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+-----END CERTIFICATE-----
+
+Not Before: Nov 13 00:00:00 2012 GMT
+Not After : Jan 19 03:14:07 2038 GMT
+Subject: OU = GlobalSign ECC Root CA - R4, O = GlobalSign, CN = GlobalSign
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Not Before: Nov  1 00:00:42 2018 GMT
+Not After : Nov  1 00:00:42 2042 GMT
+Subject: C = US, O = Google Trust Services LLC, CN = GTS LTSR
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----

examples/http-reverse-proxy/main.c

@@ -0,0 +1,82 @@
+// Copyright (c) 2020 Cesanta Software Limited
+// All rights reserved
+//
+// Example HTTP reverse proxy
+//    1. Run `make`. This builds and starts a proxy on port 8000
+//    2. Start your browser, go to https://localhost:8000
+//
+// To enable SSL/TLS, build it like this:
+//    make MBEDTLS_DIR=/path/to/your/mbedtls/installation
+
+static const char *s_backend_url = "https://cesanta.com";
+static const char *s_listen_url = "http://localhost:8000";
+
+#include "mongoose.h"
+
+// Forward client request to the backend connection, rewriting the Host header
+static void forward_request(struct mg_http_message *hm,
+                            struct mg_connection *c) {
+  size_t i, max = sizeof(hm->headers) / sizeof(hm->headers[0]);
+  struct mg_str host = mg_url_host(s_backend_url);
+  mg_printf(c, "%.*s\r\n",
+            (int) (hm->proto.ptr + hm->proto.len - hm->message.ptr),
+            hm->message.ptr);
+  for (i = 0; i < max && hm->headers[i].name.len > 0; i++) {
+    struct mg_str *k = &hm->headers[i].name, *v = &hm->headers[i].value;
+    if (mg_strcmp(*k, mg_str("Host")) == 0) v = &host;
+    mg_printf(c, "%.*s: %.*s\r\n", (int) k->len, k->ptr, (int) v->len, v->ptr);
+  }
+  mg_send(c, "\r\n", 2);
+  mg_send(c, hm->body.ptr, hm->body.len);
+  LOG(LL_DEBUG, ("FORWARDING: %.*s %.*s", (int) hm->method.len, hm->method.ptr,
+                 (int) hm->uri.len, hm->uri.ptr));
+}
+
+static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  struct mg_connection *c2 = fn_data;
+  if (ev == MG_EV_HTTP_MSG) {
+    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    if (c->label[0] != 'B' && c2 == NULL) {
+      // Client request, create backend connection Note that we're passing
+      // client connection `c` as fn_data for the created backend connection.
+      // This way, we tie together these two connections via `fn_data` pointer:
+      // client's c->fn_data points to the backend connection, and backend's
+      // c->fn_data points to the client connection
+      c2 = mg_connect(c->mgr, s_backend_url, fn, c);
+      c->fn_data = c2;
+      if (c2 != NULL) {
+        c2->is_hexdumping = 1;
+        c2->label[0] = 'B';  // Mark this connection as backend
+      } else {
+        c->is_closing = 1;
+      }
+    }
+    if (c2 != NULL && c2->label[0] == 'B') forward_request(hm, c2);
+  } else if (ev == MG_EV_READ) {
+    if (c->label[0] == 'B' && c2 != NULL) {
+      // All incoming data from the backend, forward to the client
+      mg_send(c2, c->recv.buf, c->recv.len);
+      mg_iobuf_delete(&c->recv, c->recv.len);
+    }
+  } else if (ev == MG_EV_CONNECT) {
+    if (mg_url_is_ssl(s_backend_url)) {
+      struct mg_tls_opts opts = {.ca = "ca.pem"};
+      mg_tls_init(c, &opts);
+    }
+  } else if (ev == MG_EV_CLOSE) {
+    if (c2 != NULL) c2->is_closing = 1;
+    c->fn_data = NULL;
+  }
+}
+
+int main(void) {
+  struct mg_mgr mgr;
+
+  mg_log_set("3");                               // Set log level
+  mg_mgr_init(&mgr);                             // Initialise event manager
+  mg_http_listen(&mgr, s_listen_url, fn, NULL);  // Start proxy
+  for (;;) mg_mgr_poll(&mgr, 1000);              // Event loop
+  mg_mgr_free(&mgr);
+
+  return 0;
+}

examples/http-server/Makefile

@@ -0,0 +1,18 @@
+PROG ?= example
+ROOT ?= $(realpath $(CURDIR)/../..)
+DEFS ?= -DMG_ENABLE_LINES=1 -DMG_ENABLE_DIRECTORY_LISTING=1 -DMG_ENABLE_SSI=1
+CFLAGS ?= -I../.. -W -Wall -DMG_ENABLE_IPV6=1 $(DEFS) $(EXTRA)
+VCFLAGS = /nologo /W3 /O2 /I../.. $(DEFS) $(EXTRA) /link /incremental:no /machine:IX86
+VC98 = docker run --rm -e Tmp=. -v $(ROOT):$(ROOT) -w $(CURDIR) docker.io/mdashnet/vc98
+
+all: $(PROG)
+	$(DEBUGGER) ./$(PROG) $(ARGS)
+
+$(PROG): main.c Makefile
+	$(CC) ../../mongoose.c main.c -I../.. $(CFLAGS) -o $@
+
+mongoose.exe: main.c
+	$(VC98) wine cl ../../mongoose.c main.c $(VCFLAGS) ws2_32.lib /out:$@
+
+clean:
+	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb mongoose mongoose_* mongoose.*

examples/http-server/main.c

@@ -4,15 +4,15 @@
 #include "mongoose.h"
 
 static const char *s_debug_level = "2";
-static const char *s_web_root_dir = ".";
+static const char *s_root_dir = ".";
 static const char *s_listening_address = "http://localhost:8000";
 static const char *s_enable_hexdump = "no";
-static const char *s_rewrites = "";
+static const char *s_ssi_pattern = "#.shtml";
 
 static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
   if (ev == MG_EV_HTTP_MSG) {
-    // struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    struct mg_http_serve_opts opts = {s_root_dir, s_ssi_pattern};
-    mg_http_serve_dir(c, ev_data, s_web_root_dir);
+    mg_http_serve_dir(c, ev_data, &opts);
   }
   (void) fn_data;
 }
@@ -21,13 +21,13 @@ static void usage(const char *prog) {
   fprintf(stderr,
           "Mongoose v.%s, built " __DATE__ " " __TIME__
           "\nUsage: %s OPTIONS\n"
-          "  -D LEVEL  - debug level, from 0 to 4, default: '%s'\n"
           "  -H yes|no - enable traffic hexdump, default: '%s'\n"
+          "  -S GLOB   - glob pattern for SSI files, default: '%s'\n"
           "  -d DIR    - directory to serve, default: '%s'\n"
           "  -l ADDR   - listening address, default: '%s'\n"
-          "  -r LIST   - list of URI=DIR,... URI rewrites, default: '%s'\n",
+          "  -v LEVEL  - debug level, from 0 to 4, default: '%s'\n",
-          MG_VERSION, prog, s_debug_level, s_enable_hexdump, s_web_root_dir,
+          MG_VERSION, prog, s_debug_level, s_enable_hexdump, s_ssi_pattern,
-          s_listening_address, s_rewrites);
+          s_root_dir, s_listening_address);
   exit(EXIT_FAILURE);
 }
 
@@ -39,15 +39,15 @@ int main(int argc, char *argv[]) {
   // Parse command-line flags
   for (i = 1; i < argc; i++) {
     if (strcmp(argv[i], "-d") == 0) {
-      s_web_root_dir = argv[++i];
+      s_root_dir = argv[++i];
-    } else if (strcmp(argv[i], "-D") == 0) {
-      s_debug_level = argv[++i];
     } else if (strcmp(argv[i], "-H") == 0) {
       s_enable_hexdump = argv[++i];
+    } else if (strcmp(argv[i], "-S") == 0) {
+      s_ssi_pattern = argv[++i];
     } else if (strcmp(argv[i], "-l") == 0) {
       s_listening_address = argv[++i];
-    } else if (strcmp(argv[i], "-r") == 0) {
+    } else if (strcmp(argv[i], "-v") == 0) {
-      s_rewrites = argv[++i];
+      s_debug_level = argv[++i];
     } else {
       usage(argv[0]);
     }
@@ -64,7 +64,7 @@ int main(int argc, char *argv[]) {
   if (mg_casecmp(s_enable_hexdump, "yes") == 0) c->is_hexdumping = 1;
 
   // Start infinite event loop
-  LOG(LL_INFO, ("Starting Mongoose web server v%s", MG_VERSION));
+  LOG(LL_INFO, ("Starting Mongoose v%s, serving [%s]", MG_VERSION, s_root_dir));
   for (;;) mg_mgr_poll(&mgr, 1000);
   mg_mgr_free(&mgr);
   return 0;

examples/http-streaming-client/Makefile

@@ -0,0 +1,22 @@
+PROG ?= example
+CFLAGS ?= -DMG_ENABLE_LINES $(EXTRA)
+
+ifneq ($(MBEDTLS),)
+CFLAGS += -DMG_ENABLE_MBEDTLS=1 -I$(MBEDTLS)/include -I/usr/include
+CFLAGS += -L$(MBEDTLS)/lib -lmbedtls -lmbedcrypto -lmbedx509
+endif
+
+ifneq ($(OPENSSL),)
+CFLAGS += -DMG_ENABLE_OPENSSL=1 -I$(OPENSSL)/include
+CFLAGS += -L$(OPENSSL)/lib -lssl -lcrypto
+endif
+
+all: $(PROG)
+	$(DEBUGGER) ./$(PROG) $(ARGS)
+
+
+$(PROG): main.c
+	$(CC) ../../mongoose.c -I../.. -W -Wall $(CFLAGS) -o $(PROG) main.c
+
+clean:
+	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb

examples/http-streaming-client/ca.pem

@@ -0,0 +1,507 @@
+Subject: O=Digital Signature Trust Co., CN=DST Root CA X3
+Not Before: Sep 30 21:12:19 2000 GMT
+Not After : Sep 30 14:01:15 2021 GMT
+-----BEGIN CERTIFICATE-----
+MIIDSjCCAjKgAwIBAgIQRK+wgNajJ7qJMDmGLvhAazANBgkqhkiG9w0BAQUFADA/
+MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT
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+Ob8VZRzI9neWagqNdwvYkQsEjgfbKbYK7p2CNTUQ
+-----END CERTIFICATE-----
+
+Subject: C=IE, O=Baltimore, OU=CyberTrust, CN=Baltimore CyberTrust Root
+Not Before: May 12 18:46:00 2000 GMT
+Not After : May 12 23:59:00 2025 GMT
+-----BEGIN CERTIFICATE-----
+MIIDdzCCAl+gAwIBAgIEAgAAuTANBgkqhkiG9w0BAQUFADBaMQswCQYDVQQGEwJJ
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+R9I4LtD+gdwyah617jzV/OeBHRnDJELqYzmp
+-----END CERTIFICATE-----
+
+Subject: C=US, O=GeoTrust Inc., CN=GeoTrust Global CA
+Not Before: May 21 04:00:00 2002 GMT
+Not After : May 21 04:00:00 2022 GMT
+-----BEGIN CERTIFICATE-----
+MIIDVDCCAjygAwIBAgIDAjRWMA0GCSqGSIb3DQEBBQUAMEIxCzAJBgNVBAYTAlVT
+MRYwFAYDVQQKEw1HZW9UcnVzdCBJbmMuMRswGQYDVQQDExJHZW9UcnVzdCBHbG9i
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+bw8HHa8sHo9gOeL6NlMTOdReJivbPagUvTLrGAMoUgRx5aszPeE4uwc2hGKceeoW
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+hw4EbNX/3aBd7YdStysVAq45pmp06drE57xNNB6pXE0zX5IJL4hmXXeXxx12E6nV
+5fEWCRE11azbJHFwLJhWC9kXtNHjUStedejV0NxPNO3CBWaAocvmMw==
+-----END CERTIFICATE-----
+
+Subject: C=US, O=Symantec Corporation, OU=Symantec Trust Network, CN=Symantec Class 3 ECC 256 bit SSL CA - G2
+Not Before: May 12 00:00:00 2015 GMT
+Not After : May 11 23:59:59 2025 GMT
+-----BEGIN CERTIFICATE-----
+MIIEajCCA1KgAwIBAgIQP5KHvp0dpKN6nfYoLndaxDANBgkqhkiG9w0BAQsFADCB
+yjELMAkGA1UEBhMCVVMxFzAVBgNVBAoTDlZlcmlTaWduLCBJbmMuMR8wHQYDVQQL
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+dHN9umAvlU313g0IgJrjsQ2nIdf9dsdP+6lrmP7s
+-----END CERTIFICATE-----
+
+Subject: C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=(c) 2006 VeriSign, Inc. - For authorized use only, CN=VeriSign Class 3 Public Primary Certification Authority - G5
+Not Before: Nov  8 00:00:00 2006 GMT
+Not After : Jul 16 23:59:59 2036 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Subject: C=US, O=The Go Daddy Group, Inc., OU=Go Daddy Class 2 Certification Authority
+Not Before: Jun 29 17:06:20 2004 GMT
+Not After : Jun 29 17:06:20 2034 GMT
+-----BEGIN CERTIFICATE-----
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+ReYNnyicsbkqWletNw+vHX/bvZ8=
+-----END CERTIFICATE-----
+
+# Note: Amazon ATS endpoint uses this (2018/12/18)
+Subject: C=US, O=Starfield Technologies, Inc., OU=Starfield Class 2 Certification Authority
+Not Before: Jun 29 17:39:16 2004 GMT
+Not After : Jun 29 17:39:16 2034 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Not Before: Sep  1 00:00:00 2009 GMT
+Not After : Dec 31 23:59:59 2037 GMT
+Subject: C=US, ST=Arizona, L=Scottsdale, O=Starfield Technologies, Inc., CN=Starfield Root Certificate Authority - G2
+-----BEGIN CERTIFICATE-----
+MIID3TCCAsWgAwIBAgIBADANBgkqhkiG9w0BAQsFADCBjzELMAkGA1UEBhMCVVMx
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+-----END CERTIFICATE-----
+
+Subject: C=US, ST=Arizona, L=Scottsdale, O=Starfield Technologies, Inc., CN=Starfield Services Root Certificate Authority - G2
+Not Before: Sep  1 00:00:00 2009 GMT
+Not After : Dec 31 23:59:59 2037 GMT
+-----BEGIN CERTIFICATE-----
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+sSi6
+-----END CERTIFICATE-----
+
+Subject: OU=GlobalSign Root CA - R2, O=GlobalSign, CN=GlobalSign
+Not Before: Dec 15 08:00:00 2006 GMT
+Not After : Dec 15 08:00:00 2021 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Subject: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert High Assurance EV Root CA
+Not Before: Nov 10 00:00:00 2006 GMT
+Not After : Nov 10 00:00:00 2031 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Subject: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root CA
+Not Before: Nov 10 00:00:00 2006 GMT
+Not After : Nov 10 00:00:00 2031 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# *.azure-devices.de use this root.
+Subject: C = DE, O = D-Trust GmbH, CN = D-TRUST Root Class 3 CA 2 2009
+Not Before: Nov  5 08:35:58 2009 GMT
+Not After : Nov  5 08:35:58 2029 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# https://www.amazontrust.com/repository/
+Subject: C = US, O = Amazon, CN = Amazon Root CA 1
+Not Before: May 26 00:00:00 2015 GMT
+Not After : Jan 17 00:00:00 2038 GMT
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+Subject: C = US, O = Amazon, CN = Amazon Root CA 2
+Not Before: May 26 00:00:00 2015 GMT
+Not After : May 26 00:00:00 2040 GMT
+-----BEGIN CERTIFICATE-----
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+4PsJYGw=
+-----END CERTIFICATE-----
+
+Not Before: May 26 00:00:00 2015 GMT
+Not After : May 26 00:00:00 2040 GMT
+Subject: C = US, O = Amazon, CN = Amazon Root CA 3
+-----BEGIN CERTIFICATE-----
+MIIBtjCCAVugAwIBAgITBmyf1XSXNmY/Owua2eiedgPySjAKBggqhkjOPQQDAjA5
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+YyRIHN8wfdVoOw==
+-----END CERTIFICATE-----
+
+Not Before: May 26 00:00:00 2015 GMT
+Not After : May 26 00:00:00 2040 GMT
+Subject: C = US, O = Amazon, CN = Amazon Root CA 4
+-----BEGIN CERTIFICATE-----
+MIIB8jCCAXigAwIBAgITBmyf18G7EEwpQ+Vxe3ssyBrBDjAKBggqhkjOPQQDAzA5
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+1KyLa2tJElMzrdfkviT8tQp21KW8EA==
+-----END CERTIFICATE-----
+
+Not Before: Nov 10 00:00:00 2006 GMT
+Not After : Nov 10 00:00:00 2031 GMT
+Subject: C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert Global Root CA
+-----BEGIN CERTIFICATE-----
+MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBh
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+CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4=
+-----END CERTIFICATE-----
+
+Not Before: Nov 13 00:00:00 2012 GMT
+Not After : Jan 19 03:14:07 2038 GMT
+Subject: OU = GlobalSign ECC Root CA - R4, O = GlobalSign, CN = GlobalSign
+-----BEGIN CERTIFICATE-----
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+ewv4n4Q=
+-----END CERTIFICATE-----
+
+Not Before: Nov  1 00:00:42 2018 GMT
+Not After : Nov  1 00:00:42 2042 GMT
+Subject: C = US, O = Google Trust Services LLC, CN = GTS LTSR
+-----BEGIN CERTIFICATE-----
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+miGgpajjf/gFigGM34F9021bCWs1MbL0SA==
+-----END CERTIFICATE-----

examples/http-streaming-client/main.c

@@ -0,0 +1,65 @@
+// Copyright (c) 2021 Cesanta Software Limited
+// All rights reserved
+//
+// Example HTTP client.
+// Instead of buffering the whole HTTP response in memory and wait for the
+// MG_EV_HTTP_MSG event, this client catches MG_EV_HTTP_CHUNK events and
+// prints them. This is useful to download large content without spooling
+// everything to memory, or catch chunked content.
+//
+// You can change `s_url` from the command line by executing: ./example YOUR_URL
+//
+// To enable SSL/TLS for this client, build it like this:
+//    make MBEDTLS=/path/to/your/mbedtls/installation
+//    make OPENSSL=/path/to/your/openssl/installation
+
+#include "mongoose.h"
+
+// The very first web page in history. You can replace it from command line
+static const char *s_url = "http://info.cern.ch";
+
+// Print HTTP response and signal that we're done
+static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_CONNECT) {
+    // Connected to server. Extract host name from URL
+    struct mg_str host = mg_url_host(s_url);
+
+    // If s_url is https://, tell client connection to use TLS
+    if (mg_url_is_ssl(s_url)) {
+      struct mg_tls_opts opts = {.ca = "ca.pem", .srvname = host};
+      mg_tls_init(c, &opts);
+    }
+
+    // Send request
+    mg_printf(c,
+              "GET %s HTTP/1.0\r\n"
+              "Host: %.*s\r\n"
+              "\r\n",
+              mg_url_uri(s_url), (int) host.len, host.ptr);
+  } else if (ev == MG_EV_HTTP_CHUNK) {
+    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    LOG(LL_INFO, ("%.*s", (int) hm->chunk.len, hm->chunk.ptr));
+    mg_http_delete_chunk(c, hm);
+    if (hm->chunk.len == 0) *(bool *) fn_data = true;  // Last chunk
+  } else if (ev == MG_EV_HTTP_MSG) {
+    // Response is received. Print it
+    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    LOG(LL_INFO, ("%.*s", (int) hm->body.len, hm->body.ptr));
+    c->is_closing = 1;         // Tell mongoose to close this connection
+    *(bool *) fn_data = true;  // Tell event loop to stop
+  } else if (ev == MG_EV_ERROR) {
+    *(bool *) fn_data = true;  // Error, tell event loop to stop
+  }
+}
+
+int main(int argc, char *argv[]) {
+  struct mg_mgr mgr;                        // Event manager
+  bool done = false;                        // Event handler flips it to true
+  if (argc > 1) s_url = argv[1];            // Use URL from command line
+  mg_log_set("3");                          // Set to 0 to disable debug
+  mg_mgr_init(&mgr);                        // Initialise event manager
+  mg_http_connect(&mgr, s_url, fn, &done);  // Create client connection
+  while (!done) mg_mgr_poll(&mgr, 1000);    // Infinite event loop
+  mg_mgr_free(&mgr);                        // Free resources
+  return 0;
+}

examples/live-log/main.c

@@ -11,12 +11,13 @@ static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
   if (ev == MG_EV_HTTP_MSG) {
     struct mg_http_message *hm = (struct mg_http_message *) ev_data;
     if (mg_http_match_uri(hm, "/api/log/static")) {
-      mg_http_serve_file(c, hm, "log.txt", "text/plain");
+      mg_http_serve_file(c, hm, "log.txt", "text/plain", "");
     } else if (mg_http_match_uri(hm, "/api/log/live")) {
       c->label[0] = 'L';  // Mark that connection as live log listener
       mg_printf(c, "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n");
     } else {
-      mg_http_serve_dir(c, ev_data, "web_root");
+      struct mg_http_serve_opts opts = {.root_dir = "web_root"};
+      mg_http_serve_dir(c, ev_data, &opts);
     }
   }
 }

examples/mqtt-client/main.c

@@ -18,7 +18,7 @@ static const char *s_topic = "mg/test";
 static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
   if (ev == MG_EV_ERROR) {
     // On error, log error message
-    LOG(LL_ERROR, ("%p %s", c->fd, ev_data));
+    LOG(LL_ERROR, ("%p %s", c->fd, (char *) ev_data));
   } else if (ev == MG_EV_CONNECT) {
     // If target URL is SSL/TLS, command client connection to use TLS
     if (mg_url_is_ssl(s_url)) {

examples/mqtt-server/Makefile

@@ -0,0 +1,10 @@
+PROG ?= example
+
+all: $(PROG)
+	$(DEBUGGER) ./$(PROG) $(ARGS)
+
+$(PROG): main.c
+	$(CC) ../../mongoose.c -I../.. -W -Wall -DMG_ENABLE_LINES=1 $(CFLAGS) -o $(PROG) main.c
+
+clean:
+	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb

examples/mqtt-server/main.c

@@ -0,0 +1,83 @@
+// Copyright (c) 2020 Cesanta Software Limited
+// All rights reserved
+//
+// Example MQTT server. Usage:
+//  1. Start this server, type `make`
+//  2. Install mosquitto MQTT client
+//  3. In one terminal, run:   mosquitto_sub -h localhost -t foo -t bar
+//  4. In another, run:        mosquitto_pub -h localhost -t foo -m hi
+
+#include "mongoose.h"
+
+static const char *s_listen_on = "mqtt://0.0.0.0:1883";
+
+// A list of subscription, held in memory
+struct sub {
+  struct sub *next;
+  struct mg_connection *c;
+  struct mg_str topic;
+  uint8_t qos;
+};
+static struct sub *s_subs = NULL;
+
+// Event handler function
+static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_MQTT_CMD) {
+    struct mg_mqtt_message *mm = (struct mg_mqtt_message *) ev_data;
+    LOG(LL_DEBUG, ("cmd %d qos %d", mm->cmd, mm->qos));
+    switch (mm->cmd) {
+      case MQTT_CMD_CONNECT: {
+        // Client connects. Return success, do not check user/password
+        uint8_t response[] = {0, 0};
+        mg_mqtt_send_header(c, MQTT_CMD_CONNACK, 0, sizeof(response));
+        mg_send(c, response, sizeof(response));
+        break;
+      }
+      case MQTT_CMD_SUBSCRIBE: {
+        // Client subscribes
+        int pos = 4;  // Initial topic offset, where ID ends
+        uint8_t qos;
+        struct mg_str topic;
+        while ((pos = mg_mqtt_next_sub(mm, &topic, &qos, pos)) > 0) {
+          struct sub *sub = calloc(1, sizeof(*sub));
+          sub->c = c;
+          sub->topic = mg_strdup(topic);
+          sub->qos = qos;
+          LIST_ADD_HEAD(struct sub, &s_subs, sub);
+          LOG(LL_INFO,
+              ("SUB %p [%.*s]", c->fd, (int) sub->topic.len, sub->topic.ptr));
+        }
+        break;
+      }
+      case MQTT_CMD_PUBLISH: {
+        // Client published message. Push to all subscribed channels
+        LOG(LL_INFO, ("PUB %p [%.*s] -> [%.*s]", c->fd, (int) mm->data.len,
+                      mm->data.ptr, (int) mm->topic.len, mm->topic.ptr));
+        for (struct sub *sub = s_subs; sub != NULL; sub = sub->next) {
+          if (mg_strcmp(mm->topic, sub->topic) != 0) continue;
+          mg_mqtt_pub(sub->c, &mm->topic, &mm->data);
+        }
+        break;
+      }
+    }
+  } else if (ev == MG_EV_CLOSE) {
+    // Client disconnects. Remove from the subscription list
+    for (struct sub *next, *sub = s_subs; sub != NULL; sub = next) {
+      next = sub->next;
+      if (c != sub->c) continue;
+      LOG(LL_INFO,
+          ("UNSUB %p [%.*s]", c->fd, (int) sub->topic.len, sub->topic.ptr));
+      LIST_DELETE(struct sub, &s_subs, sub);
+    }
+  }
+  (void) fn_data;
+}
+
+int main(void) {
+  struct mg_mgr mgr;                            // Event manager
+  mg_mgr_init(&mgr);                            // Initialise event manager
+  mg_mqtt_listen(&mgr, s_listen_on, fn, NULL);  // Create MQTT listener
+  for (;;) mg_mgr_poll(&mgr, 1000);             // Infinite event loop
+  mg_mgr_free(&mgr);
+  return 0;
+}

examples/multi-threaded/main.c

@@ -31,20 +31,11 @@ struct response {
 #define SLEEP_TIME 3  // Seconds to sleep to simulate calculation
 #endif
 
-static void thread_function(void *param) {
-  int sock = (long) param;                   // Grab our blocking socket
-  struct response r = {strdup("hello"), 5};  // Create response
-  sleep(SLEEP_TIME);                         // Simulate long execution
-  send(sock, (void *) &r, sizeof(r), 0);     // Send to request handler
-  close(sock);                               // Done, close socket, end thread
-}
-
 static void start_thread(void (*f)(void *), void *p) {
-#ifdef WINCE
+#ifdef _WIN32
-  CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) f, p, 0, NULL);
-#elif defined(_WIN32)
   _beginthread((void(__cdecl *)(void *)) f, 0, p);
 #else
+#define closesocket(x) close(x)
 #include <pthread.h>
   pthread_t thread_id = (pthread_t) 0;
   pthread_attr_t attr;
@@ -55,6 +46,15 @@ static void start_thread(void (*f)(void *), void *p) {
 #endif
 }
 
+static void thread_function(void *param) {
+  int sock = (long) param;                     // Grab our blocking socket
+  struct response r = {strdup("hello\n"), 6};  // Create response
+  mg_usleep(SLEEP_TIME * 1000000);             // Simulate long execution
+  LOG(LL_INFO, ("got sock %d", sock));         // For debugging
+  send(sock, (void *) &r, sizeof(r), 0);       // Send to request handler
+  closesocket(sock);                           // Done, close socket, end thread
+}
+
 // HTTP request callback
 static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
   if (ev == MG_EV_HTTP_MSG) {
@@ -70,7 +70,7 @@ static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
                 "Content-Length: 3\r\n\r\n"  // Set to allow keep-alive
                 "hi\n");
     } else {
-      int blocking, non_blocking;
+      int blocking = -1, non_blocking = -1;
       mg_socketpair(&blocking, &non_blocking);  // Create connected pair
 
       // Pass blocking socket to the thread_function.
@@ -82,7 +82,7 @@ static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
     }
   } else if (ev == MG_EV_POLL && c->fn_data != NULL) {
     // On each poll iteration, try to receive response data
-    int sock = (int) c->fn_data;
+    int sock = (int) (long) c->fn_data;
     struct response response = {NULL, 0};
     if (recv(sock, (void *) &response, sizeof(response), 0) ==
         sizeof(response)) {
@@ -90,7 +90,7 @@ static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
       mg_printf(c, "HTTP/1.0 200 OK\r\nContent-Length: %d\r\n\r\n%.*s",
                 response.len, response.len, response.data);
       free(response.data);  // We can free produced data now
-      close(sock);          // And close our end of the socket pair
+      closesocket(sock);    // And close our end of the socket pair
       c->fn_data = NULL;
     }
   }

examples/multiple-logins/main.c

@@ -71,7 +71,8 @@ static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
                            u->token);
       mg_http_printf_chunk(c, "");
     } else {
-      mg_http_serve_dir(c, ev_data, "web_root");
+      struct mg_http_serve_opts opts = {.root_dir = "web_root"};
+      mg_http_serve_dir(c, ev_data, &opts);
     }
   }
 }

examples/multiple-logins/web_root/axios.min.js

@@ -1,9 +1,3 @@
-/* axios v0.19.0-beta.1 | (c) 2018 by Matt Zabriskie */
+/* axios v0.21.1 | (c) 2020 by Matt Zabriskie */
-!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define([],t):"object"==typeof exports?exports.axios=t():e.axios=t()}(this,function(){return function(e){function t(r){if(n[r])return n[r].exports;var o=n[r]={exports:{},id:r,loaded:!1};return e[r].call(o.exports,o,o.exports,t),o.loaded=!0,o.exports}var n={};return t.m=e,t.c=n,t.p="",t(0)}([function(e,t,n){e.exports=n(1)},function(e,t,n){"use strict";function r(e){var t=new i(e),n=s(i.prototype.request,t);return o.extend(n,i.prototype,t),o.extend(n,t),n}var o=n(2),s=n(3),i=n(5),a=n(22),u=n(11),c=r(u);c.Axios=i,c.create=function(e){return r(a(c.defaults,e))},c.Cancel=n(23),c.CancelToken=n(24),c.isCancel=n(10),c.all=function(e){return Promise.all(e)},c.spread=n(25),e.exports=c,e.exports.default=c},function(e,t,n){"use strict";function r(e){return"[object Array]"===j.call(e)}function o(e){return"[object ArrayBuffer]"===j.call(e)}function s(e){return"undefined"!=typeof FormData&&e instanceof FormData}function i(e){var t;return t="undefined"!=typeof ArrayBuffer&&ArrayBuffer.isView?ArrayBuffer.isView(e):e&&e.buffer&&e.buffer instanceof ArrayBuffer}function a(e){return"string"==typeof e}function u(e){return"number"==typeof e}function c(e){return"undefined"==typeof e}function f(e){return null!==e&&"object"==typeof e}function p(e){return"[object Date]"===j.call(e)}function d(e){return"[object File]"===j.call(e)}function l(e){return"[object Blob]"===j.call(e)}function h(e){return"[object Function]"===j.call(e)}function m(e){return f(e)&&h(e.pipe)}function y(e){return"undefined"!=typeof URLSearchParams&&e instanceof URLSearchParams}function g(e){return e.replace(/^\s*/,"").replace(/\s*$/,"")}function x(){return("undefined"==typeof navigator||"ReactNative"!==navigator.product&&"NativeScript"!==navigator.product&&"NS"!==navigator.product)&&("undefined"!=typeof window&&"undefined"!=typeof document)}function v(e,t){if(null!==e&&"undefined"!=typeof e)if("object"!=typeof e&&(e=[e]),r(e))for(var n=0,o=e.length;n<o;n++)t.call(null,e[n],n,e);else for(var s in e)Object.prototype.hasOwnProperty.call(e,s)&&t.call(null,e[s],s,e)}function w(){function e(e,n){"object"==typeof t[n]&&"object"==typeof e?t[n]=w(t[n],e):t[n]=e}for(var t={},n=0,r=arguments.length;n<r;n++)v(arguments[n],e);return t}function b(){function e(e,n){"object"==typeof t[n]&&"object"==typeof e?t[n]=b(t[n],e):"object"==typeof e?t[n]=b({},e):t[n]=e}for(var t={},n=0,r=arguments.length;n<r;n++)v(arguments[n],e);return t}function E(e,t,n){return v(t,function(t,r){n&&"function"==typeof t?e[r]=S(t,n):e[r]=t}),e}var S=n(3),R=n(4),j=Object.prototype.toString;e.exports={isArray:r,isArrayBuffer:o,isBuffer:R,isFormData:s,isArrayBufferView:i,isString:a,isNumber:u,isObject:f,isUndefined:c,isDate:p,isFile:d,isBlob:l,isFunction:h,isStream:m,isURLSearchParams:y,isStandardBrowserEnv:x,forEach:v,merge:w,deepMerge:b,extend:E,trim:g}},function(e,t){"use strict";e.exports=function(e,t){return function(){for(var n=new Array(arguments.length),r=0;r<n.length;r++)n[r]=arguments[r];return e.apply(t,n)}}},function(e,t){/*!
+!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define([],t):"object"==typeof exports?exports.axios=t():e.axios=t()}(this,function(){return function(e){function t(r){if(n[r])return n[r].exports;var o=n[r]={exports:{},id:r,loaded:!1};return e[r].call(o.exports,o,o.exports,t),o.loaded=!0,o.exports}var n={};return t.m=e,t.c=n,t.p="",t(0)}([function(e,t,n){e.exports=n(1)},function(e,t,n){"use strict";function r(e){var t=new i(e),n=s(i.prototype.request,t);return o.extend(n,i.prototype,t),o.extend(n,t),n}var o=n(2),s=n(3),i=n(4),a=n(22),u=n(10),c=r(u);c.Axios=i,c.create=function(e){return r(a(c.defaults,e))},c.Cancel=n(23),c.CancelToken=n(24),c.isCancel=n(9),c.all=function(e){return Promise.all(e)},c.spread=n(25),c.isAxiosError=n(26),e.exports=c,e.exports.default=c},function(e,t,n){"use strict";function r(e){return"[object Array]"===R.call(e)}function o(e){return"undefined"==typeof e}function s(e){return 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-	 * Determine if an object is a Buffer
-	 *
-	 * @author   Feross Aboukhadijeh <https://feross.org>
-	 * @license  MIT
-	 */
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examples/socks5-server/Makefile

@@ -0,0 +1,19 @@
+PROG ?= example
+CFLAGS ?= -DMG_ENABLE_LINES $(CFLAGS_EXTRA)
+MBEDTLS_DIR ?=
+
+ifeq "$(MBEDTLS_DIR)" ""
+else
+CFLAGS += -DMG_ENABLE_MBEDTLS=1 -I$(MBEDTLS_DIR)/include -I/usr/include
+CFLAGS += -L$(MBEDTLS_DIR)/lib -lmbedtls -lmbedcrypto -lmbedx509
+endif
+
+all: $(PROG)
+	$(DEBUGGER) ./$(PROG) $(ARGS)
+
+
+$(PROG): main.c
+	$(CC) ../../mongoose.c -I../.. -W -Wall $(CFLAGS) -o $(PROG) main.c
+
+clean:
+	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb

examples/socks5-server/main.c

@@ -0,0 +1,173 @@
+// Copyright (c) 2020 Cesanta Software Limited
+// All rights reserved
+//
+// Example socks5 server. To test,
+//   1. Run `make` to start this server on port 1080
+//   2. Run `curl`
+
+#include "mongoose.h"
+
+static const char *s_lsn = "tcp://localhost:1080";  // Listening address
+
+enum {
+  VERSION = 5,                  // Socks protocol version
+  STATE_HANDSHAKE = 0,          // Connection state: in handshake
+  STATE_REQUEST = 1,            // Connection state: connecting
+  STATE_ESTABLISHED = 2,        // Connection state: established
+  HANDSHAKE_NOAUTH = 0,         // Handshake method - no authentication
+  HANDSHAKE_GSSAPI = 1,         // Handshake method - GSSAPI auth
+  HANDSHAKE_USERPASS = 2,       // Handshake method - user/password auth
+  HANDSHAKE_FAILURE = 0xff,     // Handshake method - failure
+  CMD_CONNECT = 1,              // Command: CONNECT
+  CMD_BIND = 2,                 // Command: BIND
+  CMD_UDP_ASSOCIATE = 3,        // Command: UDP ASSOCIATE
+  ADDR_TYPE_IPV4 = 1,           // Address type: IPv4
+  ADDR_TYPE_DOMAIN = 3,         // Address type: Domain name
+  ADDR_TYPE_IPV6 = 4,           // Address type: IPv6
+  RESP_SUCCESS = 0,             // Response: success
+  RESP_FAILURE = 1,             // Response: failure
+  RESP_NOT_ALLOWED = 2,         // Response status
+  RESP_NET_UNREACHABLE = 3,     // Response status
+  RESP_HOST_UNREACHABLE = 4,    // Response status
+  RESP_CONN_REFUSED = 5,        // Response status
+  RESP_TTL_EXPIRED = 6,         // Response status
+  RESP_CMD_NOT_SUPPORTED = 7,   // Response status
+  RESP_ADDR_NOT_SUPPORTED = 8,  // Response status
+};
+
+//  https://www.ietf.org/rfc/rfc1928.txt paragraph 3, handle client handshake
+//  +----+----------+----------+
+//  |VER | NMETHODS | METHODS  |
+//  +----+----------+----------+
+//  | 1  |    1     | 1 to 255 |
+//  +----+----------+----------+
+static void handshake(struct mg_connection *c) {
+  struct mg_iobuf *r = &c->recv;
+  if (r->buf[0] != VERSION) {
+    c->is_closing = 1;
+  } else if (r->len > 2 && (size_t) r->buf[1] + 2 <= r->len) {
+    /* https://www.ietf.org/rfc/rfc1928.txt paragraph 3 */
+    uint8_t reply[2] = {VERSION, HANDSHAKE_FAILURE};
+    int i;
+    for (i = 2; i < r->buf[1] + 2; i++) {
+      // TODO(lsm): support other auth methods
+      if (r->buf[i] == HANDSHAKE_NOAUTH) reply[1] = r->buf[i];
+    }
+    mg_iobuf_delete(r, 2 + r->buf[1]);
+    mg_send(c, reply, sizeof(reply));
+    c->label[0] = STATE_REQUEST;
+  }
+}
+
+static void disband(struct mg_connection *c) {
+  struct mg_connection *c2 = (struct mg_connection *) c->fn_data;
+  if (c2 != NULL) {
+    c2->is_draining = 1;
+    c2->fn_data = NULL;
+  }
+  c->is_draining = 1;
+  c->fn_data = NULL;
+}
+
+static void exchange(struct mg_connection *c) {
+  struct mg_connection *c2 = (struct mg_connection *) c->fn_data;
+  if (c2 != NULL) {
+    mg_send(c2, c->recv.buf, c->recv.len);
+    mg_iobuf_delete(&c->recv, c->recv.len);
+  } else {
+    c->is_draining = 1;
+  }
+}
+
+static void fn2(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_READ) {
+    exchange(c);
+  } else if (ev == MG_EV_CLOSE) {
+    disband(c);
+  }
+  (void) ev_data;
+  (void) fn_data;
+}
+
+//  Request, https://www.ietf.org/rfc/rfc1928.txt paragraph 4
+//  +----+-----+-------+------+----------+----------+
+//  |VER | CMD |  RSV  | ATYP | DST.ADDR | DST.PORT |
+//  +----+-----+-------+------+----------+----------+
+//  | 1  |  1  | X'00' |  1   | Variable |    2     |
+//  +----+-----+-------+------+----------+----------+
+static void request(struct mg_connection *c) {
+  struct mg_iobuf *r = &c->recv;
+  uint8_t *p = r->buf, addr_len = 4, reply = RESP_SUCCESS;
+  int ver, cmd, atyp;
+  char addr[1024];
+
+  if (r->len < 8) return;  // return if not fully buffered. min DST.ADDR is 2
+  ver = p[0];
+  cmd = p[1];
+  atyp = p[3];
+
+  // TODO(lsm): support other commands
+  if (ver != VERSION || cmd != CMD_CONNECT) {
+    reply = RESP_CMD_NOT_SUPPORTED;
+  } else if (atyp == ADDR_TYPE_IPV4) {
+    addr_len = 4;
+    if (r->len < (size_t) addr_len + 6) return; /* return if not buffered */
+    snprintf(addr, sizeof(addr), "tcp://%d.%d.%d.%d:%d", p[4], p[5], p[6], p[7],
+             p[8] << 8 | p[9]);
+    c->fn_data = mg_connect(c->mgr, addr, fn2, c);
+  } else if (atyp == ADDR_TYPE_IPV6) {
+    addr_len = 16;
+    if (r->len < (size_t) addr_len + 6) return; /* return if not buffered */
+    snprintf(addr, sizeof(addr), "tcp://[%x:%x:%x:%x:%x:%x:%x:%x]:%d",
+             p[4] << 8 | p[5], p[6] << 8 | p[7], p[8] << 8 | p[9],
+             p[10] << 8 | p[11], p[12] << 8 | p[13], p[14] << 8 | p[15],
+             p[16] << 8 | p[17], p[18] << 8 | p[19], p[20] << 8 | p[21]);
+    c->fn_data = mg_connect(c->mgr, addr, fn2, c);
+  } else if (atyp == ADDR_TYPE_DOMAIN) {
+    addr_len = p[4] + 1;
+    if (r->len < (size_t) addr_len + 6) return; /* return if not buffered */
+    snprintf(addr, sizeof(addr), "tcp://%.*s:%d", p[4], p + 5,
+             p[4 + addr_len] << 8 | p[4 + addr_len + 1]);
+    c->fn_data = mg_connect(c->mgr, addr, fn2, c);
+  } else {
+    reply = RESP_ADDR_NOT_SUPPORTED;
+  }
+
+  //  Reply, https://www.ietf.org/rfc/rfc1928.txt paragraph 5
+  //
+  //  +----+-----+-------+------+----------+----------+
+  //  |VER | REP |  RSV  | ATYP | BND.ADDR | BND.PORT |
+  //  +----+-----+-------+------+----------+----------+
+  //  | 1  |  1  | X'00' |  1   | Variable |    2     |
+  //  +----+-----+-------+------+----------+----------+
+  {
+    uint8_t buf[] = {VERSION, reply, 0};
+    mg_send(c, buf, sizeof(buf));
+  }
+  mg_send(c, r->buf + 3, addr_len + 1 + 2);
+  mg_iobuf_delete(r, 6 + addr_len);  // Remove request from the input stream
+  c->label[0] = STATE_ESTABLISHED;   // Mark ourselves as connected
+}
+
+static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_READ) {
+    // We use the first label byte as a state
+    if (c->label[0] == STATE_HANDSHAKE) handshake(c);
+    if (c->label[0] == STATE_REQUEST) request(c);
+    if (c->label[0] == STATE_ESTABLISHED) exchange(c);
+  } else if (ev == MG_EV_CLOSE) {
+    disband(c);
+  }
+  (void) fn_data;
+  (void) ev_data;
+}
+
+int main(void) {
+  struct mg_mgr mgr;                     // Event manager
+  mg_log_set("3");                       // Set to 0 to disable debug
+  mg_mgr_init(&mgr);                     // Initialise event manager
+  mg_listen(&mgr, s_lsn, fn, NULL);      // Create client connection
+  while (true) mg_mgr_poll(&mgr, 1000);  // Infinite event loop
+  mg_mgr_free(&mgr);                     // Free resources
+  return 0;
+}

examples/timers/Makefile

@@ -0,0 +1,10 @@
+PROG ?= example
+
+all: $(PROG)
+	$(DEBUGGER) ./$(PROG) $(ARGS)
+
+$(PROG): main.c
+	$(CC) ../../mongoose.c -I../.. -W -Wall -DMG_ENABLE_LINES=1 -DMG_ENABLE_DIRECTORY_LISTING=1 $(CFLAGS) -o $(PROG) main.c
+
+clean:
+	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb

examples/timers/main.c

@@ -0,0 +1,54 @@
+// Copyright (c) 2020 Cesanta Software Limited
+// All rights reserved
+//
+// Example Websocket server with timers. This is a simple Websocket echo
+// server, which sends a message to all connected clients periodically,
+// using timer API.
+//
+//  1. Start this server, type `make`
+//  2. Open https://www.websocket.org/echo.html in your browser
+//  3. In the "Location" text field, type ws://127.0.0.1:8000/websocket
+//  4. See "hi" messages appearing periodically
+
+#include "mongoose.h"
+
+static const char *s_listen_on = "http://localhost:8000";
+
+// This RESTful server implements the following endpoints:
+static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_HTTP_MSG) {
+    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    mg_ws_upgrade(c, hm, NULL);
+  } else if (ev == MG_EV_WS_MSG) {
+    // Got websocket frame. Received data is wm->data. Echo it back!
+    struct mg_ws_message *wm = (struct mg_ws_message *) ev_data;
+    mg_ws_send(c, wm->data.ptr, wm->data.len, WEBSOCKET_OP_TEXT);
+    mg_iobuf_delete(&c->recv, c->recv.len);
+  }
+  (void) fn_data;
+}
+
+static void timer_fn(void *arg) {
+  struct mg_mgr *mgr = (struct mg_mgr *) arg;
+  struct mg_connection *c;
+  // Broadcast "hi" message to all connected websocket clients.
+  // Traverse over all connections
+  for (c = mgr->conns; c != NULL; c = c->next) {
+    // Send only to accepted websocket connections
+    if (c->is_accepted && c->is_websocket) {
+      mg_ws_send(c, "hi", 2, WEBSOCKET_OP_TEXT);
+    }
+  }
+}
+
+int main(void) {
+  struct mg_mgr mgr;   // Event manager
+  struct mg_timer t1;  // Timer
+  mg_mgr_init(&mgr);   // Initialise event manager
+  mg_timer_init(&t1, 300, MG_TIMER_REPEAT, timer_fn, &mgr);  // Init timer
+  mg_http_listen(&mgr, s_listen_on, fn, NULL);  // Create HTTP listener
+  for (;;) mg_mgr_poll(&mgr, 1000);             // Infinite event loop
+  mg_timer_free(&t1);                           // Free timer resources
+  mg_mgr_free(&mgr);                            // Free manager resources
+  return 0;
+}

examples/video-stream/main.c

@@ -18,7 +18,8 @@ static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
           "Pragma: no-cache\r\nExpires: Thu, 01 Dec 1994 16:00:00 GMT\r\n"
           "Content-Type: multipart/x-mixed-replace; boundary=--foo\r\n\r\n");
     } else {
-      mg_http_serve_dir(c, ev_data, "web_root");
+      struct mg_http_serve_opts opts = {.root_dir = "web_root"};
+      mg_http_serve_dir(c, ev_data, &opts);
     }
   }
 }
@@ -35,7 +36,7 @@ static void broadcast_mjpeg_frame(struct mg_mgr *mgr) {
   char *data = mg_file_read(path);  // Read next file
   struct mg_connection *c;
   for (c = mgr->conns; c != NULL; c = c->next) {
-    if (c->label[0] != 'S') continue;      // Skip non-stream connections
+    if (c->label[0] != 'S') continue;         // Skip non-stream connections
     if (data == NULL || size == 0) continue;  // Skip on file read error
     mg_printf(c,
               "--foo\r\nContent-Type: image/jpeg\r\n"

examples/websocket-client/main.c

@@ -13,7 +13,7 @@ static const char *s_url = "ws://localhost:8000/websocket";
 static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
   if (ev == MG_EV_ERROR) {
     // On error, log error message
-    LOG(LL_ERROR, ("%p %s", c->fd, ev_data));
+    LOG(LL_ERROR, ("%p %s", c->fd, (char *) ev_data));
   } else if (ev == MG_EV_WS_OPEN) {
     // When websocket handshake is successful, send message
     mg_ws_send(c, "hello", 5, WEBSOCKET_OP_TEXT);

examples/websocket-server/main.c

@@ -21,13 +21,14 @@ static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
     if (mg_http_match_uri(hm, "/websocket")) {
       // Upgrade to websocket. From now on, a connection is a full-duplex
       // Websocket connection, which will receive MG_EV_WS_MSG events.
-      mg_ws_upgrade(c, hm);
+      mg_ws_upgrade(c, hm, NULL);
     } else if (mg_http_match_uri(hm, "/rest")) {
       // Serve REST response
-      mg_http_reply(c, 200, "{\"result\": %d}\n", 123);
+      mg_http_reply(c, 200, "", "{\"result\": %d}\n", 123);
     } else {
       // Serve static files
-      mg_http_serve_dir(c, ev_data, s_web_directory);
+      struct mg_http_serve_opts opts = {.root_dir = s_web_directory};
+      mg_http_serve_dir(c, ev_data, &opts);
     }
   } else if (ev == MG_EV_WS_MSG) {
     // Got websocket frame. Received data is wm->data. Echo it back!

mongoose.h

@@ -1,5 +1,5 @@
 // Copyright (c) 2004-2013 Sergey Lyubka
-// Copyright (c) 2013-2020 Cesanta Software Limited
+// Copyright (c) 2013-2021 Cesanta Software Limited
 // All rights reserved
 //
 // This software is dual-licensed: you can redistribute it and/or modify
@@ -14,9 +14,8 @@
 //
 // Alternatively, you can license this software under a commercial
 // license, as set out in <https://www.cesanta.com/license>.
-
 #pragma once
-#define MG_VERSION "7.0"
+#define MG_VERSION "7.2"
 
 
 #define MG_ARCH_CUSTOM 0
@@ -61,10 +60,10 @@
 #define MG_ARCH MG_ARCH_NXP_KINETIS
 #elif defined(PIC32)
 #define MG_ARCH MG_ARCH_PIC32
-#elif defined(ESP_PLATFORM)
-#define MG_ARCH MG_ARCH_ESP32
 #elif defined(ICACHE_FLASH) || defined(ICACHE_RAM_ATTR)
 #define MG_ARCH MG_ARCH_ESP8266
+#elif defined(ESP_PLATFORM)
+#define MG_ARCH MG_ARCH_ESP32
 #elif defined(TARGET_IS_TM4C129_RA0) || defined(TARGET_IS_TM4C129_RA1) || \
     defined(TARGET_IS_TM4C129_RA2)
 #define MG_ARCH MG_ARCH_TM4C129
@@ -120,7 +119,12 @@
 
 #include <dirent.h>
 #include <netdb.h>
+#include <sys/stat.h>
 #define MG_DIRSEP '/'
+#define MG_INT64_FMT "%lld"
+#ifndef MG_PATH_MAX
+#define MG_PATH_MAX 128
+#endif
 
 #endif
 
@@ -128,26 +132,12 @@
 #if MG_ARCH == MG_ARCH_ESP8266
 
 #include <dirent.h>
+#include <esp_system.h>
+#include <netdb.h>
 #include <stdbool.h>
 #include <sys/time.h>
-#include <user_interface.h>
-
 #define MG_DIRSEP '/'
-#ifndef PATH_MAX
+#define MG_INT64_FMT "%lld"
-#define PATH_MAX 128
-#endif
-#define MG_ENABLE_LWIP 1
-#define LWIP_TIMEVAL_PRIVATE 0  // struct timeval is defined in sys/time.h
-
-#if LWIP_SOCKET
-#include <lwip/sockets.h>
-#else
-#undef LWIP_SOCKET
-#define LWIP_SOCKET 1
-#include <lwip/sockets.h>  // Source sockaddr_in anyway
-#undef LWIP_SOCKET
-#define LWIP_SOCKET 0
-#endif
 
 #endif
 
@@ -161,6 +151,7 @@
 #include <FreeRTOS_Sockets.h>
 #include <stdbool.h>
 
+#define MG_INT64_FMT "%lld"
 #define MG_DIRSEP '/'
 #define IPPROTO_TCP FREERTOS_IPPROTO_TCP
 #define IPPROTO_UDP FREERTOS_IPPROTO_UDP
@@ -221,6 +212,7 @@ static inline int ff_vfprintf(FF_FILE *fp, const char *fmt, va_list ap) {
 
 #include <arpa/inet.h>
 #include <dirent.h>
+#include <inttypes.h>
 #include <netdb.h>
 #include <netinet/tcp.h>
 #include <signal.h>
@@ -232,6 +224,7 @@ static inline int ff_vfprintf(FF_FILE *fp, const char *fmt, va_list ap) {
 #include <unistd.h>
 #define MG_DIRSEP '/'
 #define MG_ENABLE_POSIX 1
+#define MG_INT64_FMT "%" PRId64
 
 #endif
 
@@ -243,31 +236,40 @@ static inline int ff_vfprintf(FF_FILE *fp, const char *fmt, va_list ap) {
 typedef __int64 int64_t;
 typedef unsigned __int64 uint64_t;
 typedef unsigned char uint8_t;
+typedef char int8_t;
 typedef unsigned short uint16_t;
+typedef short int16_t;
 typedef unsigned int uint32_t;
-typedef int bool;
+typedef int int32_t;
-enum { false = 0, true = 1 };
+typedef enum { false = 0, true = 1 } bool;
 #else
 #include <stdbool.h>
 #include <stdint.h>
+#include <ws2tcpip.h>
 #endif
 
 #include <winsock2.h>
+
+// Protect from calls like std::snprintf in app code
+// See https://github.com/cesanta/mongoose/issues/1047
+#ifndef __cplusplus
 #define snprintf _snprintf
 #define vsnprintf _vsnprintf
 #define strdup(x) _strdup(x)
-#define sleep(x) Sleep((x) *1000)
+#endif
+
 typedef int socklen_t;
-#define PATH_MAX MAX_PATH
 #define MG_DIRSEP '\\'
-#define inline __inline
+#ifndef PATH_MAX
+#define PATH_MAX MAX_PATH
+#endif
 #ifndef EINPROGRESS
 #define EINPROGRESS WSAEINPROGRESS
 #endif
 #ifndef EWOULDBLOCK
 #define EWOULDBLOCK WSAEWOULDBLOCK
 #endif
-#define realpath(a, b) _fullpath((b), (a), 512)
+#define realpath(a, b) _fullpath((b), (a), MG_PATH_MAX)
 #ifndef va_copy
 #ifdef __va_copy
 #define va_copy __va_copy
@@ -275,11 +277,12 @@ typedef int socklen_t;
 #define va_copy(x, y) (x) = (y)
 #endif
 #endif
-
 #ifndef S_ISDIR
 #define S_ISDIR(x) (((x) &_S_IFMT) == _S_IFDIR)
 #endif
 
+#define MG_INT64_FMT "%I64d"
+
 #endif
 
 
@@ -289,7 +292,7 @@ typedef int socklen_t;
 
 #if MG_ENABLE_LWIP
 #define MG_ENABLE_SOCKET 0
-#else
+#elif !defined(MG_ENABLE_SOCKET)
 #define MG_ENABLE_SOCKET 1
 #endif
 
@@ -305,6 +308,10 @@ typedef int socklen_t;
 #define MG_ENABLE_FS 1
 #endif
 
+#ifndef MG_ENABLE_SSI
+#define MG_ENABLE_SSI 0
+#endif
+
 #ifndef MG_ENABLE_IPV6
 #define MG_ENABLE_IPV6 0
 #endif
@@ -325,10 +332,6 @@ typedef int socklen_t;
 #define MG_ENABLE_DIRECTORY_LISTING 0
 #endif
 
-#ifndef MG_ENABLE_HTTP_DEBUG_ENDPOINT
-#define MG_ENABLE_HTTP_DEBUG_ENDPOINT 0
-#endif
-
 #ifndef MG_ENABLE_SOCKETPAIR
 #define MG_ENABLE_SOCKETPAIR 0
 #endif
@@ -347,6 +350,10 @@ typedef int socklen_t;
 #define MG_MAX_HTTP_HEADERS 40
 #endif
 
+#ifndef MG_PATH_MAX
+#define MG_PATH_MAX PATH_MAX
+#endif
+
 
 #include <ctype.h>
 #include <string.h>
@@ -416,26 +423,36 @@ void mg_timer_poll(unsigned long uptime_ms);
 
 
 char *mg_file_read(const char *path);
-size_t mg_file_size(const char *path);
+int64_t mg_file_size(const char *path);
-int mg_file_write(const char *path, const char *fmt, ...);
+bool mg_file_write(const char *path, const void *buf, size_t len);
+bool mg_file_printf(const char *path, const char *fmt, ...);
 void mg_random(void *buf, size_t len);
 bool mg_globmatch(const char *pattern, int plen, const char *s, int n);
 bool mg_next_comma_entry(struct mg_str *s, struct mg_str *k, struct mg_str *v);
 uint16_t mg_ntohs(uint16_t net);
 uint32_t mg_ntohl(uint32_t net);
-char *mg_hexdump(const void *buf, int len);
+uint32_t mg_crc32(uint32_t crc, const char *buf, size_t len);
+char *mg_hexdump(const void *buf, size_t len);
 char *mg_hex(const void *buf, int len, char *dst);
 void mg_unhex(const char *buf, int len, unsigned char *to);
 unsigned long mg_unhexn(const char *s, int len);
 int mg_asprintf(char **buf, size_t size, const char *fmt, ...);
 int mg_vasprintf(char **buf, size_t size, const char *fmt, va_list ap);
-int64_t mg_to64(const char *s);
+int64_t mg_to64(struct mg_str str);
-bool mg_aton(const char *s, uint32_t *ipaddr);
-char *mg_ntoa(uint32_t ipaddr, char *buf, size_t len);
 double mg_time(void);
 unsigned long mg_millis(void);
 void mg_usleep(unsigned long usecs);
 
+#if MG_ENABLE_FS
+#ifdef _WIN32
+typedef struct _stati64 mg_stat_t;
+#else
+typedef struct stat mg_stat_t;
+#endif
+int mg_stat(const char *path, mg_stat_t *);
+FILE *mg_fopen(const char *fp, const char *mode);
+#endif
+
 #define mg_htons(x) mg_ntohs(x)
 #define mg_htonl(x) mg_ntohl(x)
 
@@ -446,7 +463,7 @@ void mg_usleep(unsigned long usecs);
 #if !defined(WEAK)
 #if (defined(__GNUC__) || defined(__clang__) || \
      defined(__TI_COMPILER_VERSION__)) &&       \
-    !defined(_WIN32)
+    !defined(_WIN32) && !defined(__CYGWIN__)
 #define WEAK __attribute__((weak))
 #else
 #define WEAK
@@ -503,8 +520,8 @@ struct mg_iobuf {
   size_t size, len;
 };
 
-void mg_iobuf_init(struct mg_iobuf *, size_t);
+int mg_iobuf_init(struct mg_iobuf *, size_t);
-void mg_iobuf_resize(struct mg_iobuf *, size_t);
+int mg_iobuf_resize(struct mg_iobuf *, size_t);
 void mg_iobuf_free(struct mg_iobuf *);
 size_t mg_iobuf_append(struct mg_iobuf *, const void *, size_t, size_t);
 size_t mg_iobuf_delete(struct mg_iobuf *, size_t);
@@ -547,36 +564,28 @@ void mg_hmac_sha1(const unsigned char *key, size_t key_len,
 struct mg_connection;
 typedef void (*mg_event_handler_t)(struct mg_connection *, int ev,
                                    void *ev_data, void *fn_data);
-#if 0
-struct mg_fn {
-  struct mg_fn *next;
-  mg_event_handler_t fn;
-  void *fn_data;
-};
-
-void mg_fn_add(struct mg_connection *c, mg_event_handler_t fn, void *fn_data);
-void mg_fn_del(struct mg_connection *c, mg_event_handler_t fn);
-#endif
-
 void mg_call(struct mg_connection *c, int ev, void *ev_data);
 void mg_error(struct mg_connection *c, const char *fmt, ...);
 
 enum {
-  MG_EV_ERROR,     // Error                        char *error_message
+  MG_EV_ERROR,       // Error                        char *error_message
-  MG_EV_POLL,      // mg_mgr_poll iteration        unsigned long *millis
+  MG_EV_POLL,        // mg_mgr_poll iteration        unsigned long *millis
-  MG_EV_RESOLVE,   // Host name is resolved        NULL
+  MG_EV_RESOLVE,     // Host name is resolved        NULL
-  MG_EV_CONNECT,   // Connection established       NULL
+  MG_EV_CONNECT,     // Connection established       NULL
-  MG_EV_ACCEPT,    // Connection accepted          NULL
+  MG_EV_ACCEPT,      // Connection accepted          NULL
-  MG_EV_READ,      // Data received from socket    struct mg_str *
+  MG_EV_READ,        // Data received from socket    struct mg_str *
-  MG_EV_WRITE,     // Data written to socket       int *num_bytes_written
+  MG_EV_WRITE,       // Data written to socket       int *num_bytes_written
-  MG_EV_CLOSE,     // Connection closed            NULL
+  MG_EV_CLOSE,       // Connection closed            NULL
-  MG_EV_HTTP_MSG,  // HTTP request/response        struct mg_http_message *
+  MG_EV_HTTP_MSG,    // HTTP request/response        struct mg_http_message *
-  MG_EV_WS_OPEN,    // Websocket handshake done     NULL
+  MG_EV_HTTP_CHUNK,  // HTTP chunk (partial msg)     struct mg_http_message *
-  MG_EV_WS_MSG,     // Websocket message received   struct mg_ws_message *
+  MG_EV_WS_OPEN,     // Websocket handshake done     struct mg_http_message *
-  MG_EV_MQTT_MSG,   // MQTT message                 struct mg_mqtt_message *
+  MG_EV_WS_MSG,      // Websocket msg, text or bin   struct mg_ws_message *
-  MG_EV_MQTT_OPEN,  // MQTT CONNACK received        int *connack_status_code
+  MG_EV_WS_CTL,      // Websocket control msg        struct mg_ws_message *
-  MG_EV_SNTP_TIME,  // SNTP time received           struct timeval *
+  MG_EV_MQTT_CMD,    // MQTT low-level command       struct mg_mqtt_message *
-  MG_EV_USER,       // Starting ID for user events
+  MG_EV_MQTT_MSG,    // MQTT PUBLISH received        struct mg_mqtt_message *
+  MG_EV_MQTT_OPEN,   // MQTT CONNACK received        int *connack_status_code
+  MG_EV_SNTP_TIME,   // SNTP time received           struct timeval *
+  MG_EV_USER,        // Starting ID for user events
 };
 
 
@@ -585,19 +594,28 @@ enum {
 
 
 
-struct mg_mgr {
+struct mg_dns {
-  struct mg_connection *conns;  // List of active connections
+  const char *url;          // DNS server URL
-  struct mg_connection *dnsc;   // DNS resolver connection
+  struct mg_connection *c;  // DNS server connection
-  const char *dnsserver;        // DNS server URL
-  int dnstimeout;               // DNS resolve timeout in milliseconds
-#if MG_ARCH == MG_ARCH_FREERTOS
-  SocketSet_t ss;  // NOTE(lsm): referenced from socket struct
-#endif
 };
 
 struct mg_addr {
-  uint16_t port;  // TCP or UDP port in network byte order
+  uint16_t port;    // TCP or UDP port in network byte order
-  uint32_t ip;    // IP address in network byte order
+  uint32_t ip;      // IP address in network byte order
+  uint8_t ip6[16];  // IPv6 address
+  bool is_ip6;      // True when address is IPv6 address
+};
+
+struct mg_mgr {
+  struct mg_connection *conns;  // List of active connections
+  struct mg_dns dns4;           // DNS for IPv4
+  struct mg_dns dns6;           // DNS for IPv6
+  int dnstimeout;               // DNS resolve timeout in milliseconds
+  unsigned long nextid;         // Next connection ID
+  void *userdata;               // Arbitrary user data pointer
+#if MG_ARCH == MG_ARCH_FREERTOS
+  SocketSet_t ss;  // NOTE(lsm): referenced from socket struct
+#endif
 };
 
 struct mg_connection {
@@ -605,13 +623,14 @@ struct mg_connection {
   struct mg_mgr *mgr;          // Our container
   struct mg_addr peer;         // Remote peer address
   void *fd;                    // Connected socket, or LWIP data
+  unsigned long id;            // Auto-incrementing unique connection ID
   struct mg_iobuf recv;        // Incoming data
   struct mg_iobuf send;        // Outgoing data
   mg_event_handler_t fn;       // User-specified event handler function
   void *fn_data;               // User-speficied function parameter
   mg_event_handler_t pfn;      // Protocol-specific handler function
   void *pfn_data;              // Protocol-specific function parameter
-  char label[32];              // Arbitrary label
+  char label[50];              // Arbitrary label
   void *tls;                   // TLS specific data
   unsigned is_listening : 1;   // Listening connection
   unsigned is_client : 1;      // Outbound (client) connection
@@ -642,6 +661,8 @@ int mg_printf(struct mg_connection *, const char *fmt, ...);
 int mg_vprintf(struct mg_connection *, const char *fmt, va_list ap);
 char *mg_straddr(struct mg_connection *, char *, size_t);
 bool mg_socketpair(int *s1, int *s2);
+bool mg_aton(struct mg_str str, struct mg_addr *addr);
+char *mg_ntoa(const struct mg_addr *addr, char *buf, size_t len);
 
 
 
@@ -657,30 +678,40 @@ struct mg_http_message {
   //        GET /foo/bar/baz?aa=b&cc=ddd HTTP/1.1
   // method |-| |----uri---| |--query--| |proto-|
 
-  struct mg_str method, uri, query, proto;  // Request/response line
+  struct mg_str method, uri, query, proto;             // Request/response line
   struct mg_http_header headers[MG_MAX_HTTP_HEADERS];  // Headers
-  struct mg_str body;                       // Body
+  struct mg_str body;                                  // Body
-  struct mg_str message;                    // Request line + headers + body
+  struct mg_str head;                                  // Request + headers
+  struct mg_str chunk;    // Chunk for chunked encoding,  or partial body
+  struct mg_str message;  // Request + headers + body
+};
+
+// Parameter for mg_http_serve_dir()
+struct mg_http_serve_opts {
+  const char *root_dir;     // Web root directory, must be non-NULL
+  const char *ssi_pattern;  // SSI filename pattern, e.g. #.shtml
 };
 
 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_write_head(struct mg_connection *, int code, const char *fmt, ...);
 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,
                                       mg_event_handler_t fn, void *fn_data);
 void mg_http_serve_dir(struct mg_connection *, struct mg_http_message *hm,
-                       const char *path);
+                       struct mg_http_serve_opts *);
 void mg_http_serve_file(struct mg_connection *, struct mg_http_message *,
-                        const char *, const char *mime);
+                        const char *, const char *mime, const char *headers);
-void mg_http_reply(struct mg_connection *c, int code, const char *fmt, ...);
+void mg_http_reply(struct mg_connection *, int status_code, const char *headers,
+                   const char *body_fmt, ...);
 struct mg_str *mg_http_get_header(struct mg_http_message *, const char *name);
 void mg_http_event_handler(struct mg_connection *c, int ev);
 int mg_http_get_var(const struct mg_str *, const char *name, char *, int);
 int mg_url_decode(const char *s, size_t n, char *to, size_t to_len, int form);
+int mg_url_encode(const char *s, size_t n, char *buf, size_t len);
 void mg_http_creds(struct mg_http_message *, char *user, int, char *pass, int);
 bool mg_http_match_uri(const struct mg_http_message *, const char *glob);
 int mg_http_upload(struct mg_connection *, struct mg_http_message *hm,
@@ -688,13 +719,17 @@ int mg_http_upload(struct mg_connection *, struct mg_http_message *hm,
 void mg_http_bauth(struct mg_connection *, const char *user, const char *pass);
 
 
+void mg_http_serve_ssi(struct mg_connection *c, const char *root,
+                       const char *fullpath);
+
+
 
 struct mg_tls_opts {
-  const char *ca;        // CA certificate file. For both listeners and clients
+  const char *ca;         // CA certificate file. For both listeners and clients
-  const char *cert;      // Certificate
+  const char *cert;       // Certificate
-  const char *certkey;   // Certificate key
+  const char *certkey;    // Certificate key
-  const char *ciphers;   // Cipher list
+  const char *ciphers;    // Cipher list
-  const char *srvname;   // If not NULL, enables server name verification
+  struct mg_str srvname;  // If not empty, enables server name verification
 };
 
 int mg_tls_init(struct mg_connection *, struct mg_tls_opts *);
@@ -724,7 +759,8 @@ struct mg_ws_message {
 struct mg_connection *mg_ws_connect(struct mg_mgr *, const char *url,
                                     mg_event_handler_t fn, void *fn_data,
                                     const char *fmt, ...);
-void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *);
+void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *,
+                   const char *fmt, ...);
 size_t mg_ws_send(struct mg_connection *, const char *buf, size_t len, int op);
 
 
@@ -739,6 +775,25 @@ int mg_sntp_parse(const unsigned char *buf, size_t len, struct timeval *tv);
 
 
 
+#define MQTT_CMD_CONNECT 1
+#define MQTT_CMD_CONNACK 2
+#define MQTT_CMD_PUBLISH 3
+#define MQTT_CMD_PUBACK 4
+#define MQTT_CMD_PUBREC 5
+#define MQTT_CMD_PUBREL 6
+#define MQTT_CMD_PUBCOMP 7
+#define MQTT_CMD_SUBSCRIBE 8
+#define MQTT_CMD_SUBACK 9
+#define MQTT_CMD_UNSUBSCRIBE 10
+#define MQTT_CMD_UNSUBACK 11
+#define MQTT_CMD_PINGREQ 12
+#define MQTT_CMD_PINGRESP 13
+#define MQTT_CMD_DISCONNECT 14
+
+#define MQTT_QOS(qos) ((qos) << 1)
+#define MQTT_GET_QOS(flags) (((flags) &0x6) >> 1)
+#define MQTT_SET_QOS(flags, qos) (flags) = ((flags) & ~0x6) | ((qos) << 1)
+
 struct mg_mqtt_opts {
   struct mg_str client_id;
   struct mg_str will_topic;
@@ -750,28 +805,69 @@ struct mg_mqtt_opts {
 };
 
 struct mg_mqtt_message {
-  struct mg_str topic;
+  struct mg_str topic;    // Parsed topic
-  struct mg_str data;
+  struct mg_str data;     // Parsed message
+  struct mg_str dgram;    // Whole MQTT datagram, including headers
+  uint16_t id;  // Set for PUBACK, PUBREC, PUBREL, PUBCOMP, SUBACK, PUBLISH
+  uint8_t cmd;  // MQTT command, one of MQTT_CMD_*
+  uint8_t qos;  // Quality of service
+  uint8_t ack;  // Connack return code. 0 - success
 };
 
 struct mg_connection *mg_mqtt_connect(struct mg_mgr *, const char *url,
                                       struct mg_mqtt_opts *opts,
                                       mg_event_handler_t fn, void *fn_data);
+struct mg_connection *mg_mqtt_listen(struct mg_mgr *mgr, const char *url,
+                                     mg_event_handler_t fn, void *fn_data);
 void mg_mqtt_pub(struct mg_connection *, struct mg_str *topic,
                  struct mg_str *data);
 void mg_mqtt_sub(struct mg_connection *, struct mg_str *topic);
-int mg_mqtt_parse(const unsigned char *buf, int len, struct mg_mqtt_message *m);
+int mg_mqtt_parse(const uint8_t *buf, size_t len, struct mg_mqtt_message *m);
+void mg_mqtt_send_header(struct mg_connection *, uint8_t cmd, uint8_t flags,
+                         uint32_t len);
+int mg_mqtt_next_sub(struct mg_mqtt_message *msg, struct mg_str *topic,
+                     uint8_t *qos, int pos);
+int mg_mqtt_next_unsub(struct mg_mqtt_message *msg, struct mg_str *topic,
+                       int pos);
+void mg_mqtt_ping(struct mg_connection *);
+void mg_mqtt_pong(struct mg_connection *);
+void mg_mqtt_disconnect(struct mg_connection *);
 
 
 
 
 
+// Mongoose sends DNS queries that contain only one question:
+// either A (IPv4) or AAAA (IPv6) address lookup.
+// Therefore, we expect zero or one answer.
+// If `resolved` is true, then `addr` contains resolved IPv4 or IPV6 address.
 struct mg_dns_message {
-  uint16_t txnid;   // Transaction ID
+  uint16_t txnid;       // Transaction ID
-  uint32_t ipaddr;  // Resolved IPv4 address
+  bool resolved;        // Resolve successful, addr is set
-  char name[256];   // Host name
+  struct mg_addr addr;  // Resolved address
+  char name[256];       // Host name
 };
 
-void mg_resolve(struct mg_mgr *, struct mg_connection *, struct mg_str *, int);
+struct mg_dns_header {
-void mg_resolve_cancel(struct mg_mgr *, struct mg_connection *);
+  uint16_t txnid;  // Transaction ID
-int mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *);
+  uint16_t flags;
+  uint16_t num_questions;
+  uint16_t num_answers;
+  uint16_t num_authority_prs;
+  uint16_t num_other_prs;
+};
+
+// DNS resource record
+struct mg_dns_rr {
+  uint16_t nlen;    // Name or pointer length
+  uint16_t atype;   // Address type
+  uint16_t aclass;  // Address class
+  uint16_t alen;    // Address length
+};
+
+void mg_resolve(struct mg_connection *, struct mg_str *, int);
+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 *);
+size_t mg_dns_decode_name(const uint8_t *, size_t, size_t, char *, size_t);

src/arch.h

@@ -42,10 +42,10 @@
 #define MG_ARCH MG_ARCH_NXP_KINETIS
 #elif defined(PIC32)
 #define MG_ARCH MG_ARCH_PIC32
-#elif defined(ESP_PLATFORM)
-#define MG_ARCH MG_ARCH_ESP32
 #elif defined(ICACHE_FLASH) || defined(ICACHE_RAM_ATTR)
 #define MG_ARCH MG_ARCH_ESP8266
+#elif defined(ESP_PLATFORM)
+#define MG_ARCH MG_ARCH_ESP32
 #elif defined(TARGET_IS_TM4C129_RA0) || defined(TARGET_IS_TM4C129_RA1) || \
     defined(TARGET_IS_TM4C129_RA2)
 #define MG_ARCH MG_ARCH_TM4C129

src/arch_esp32.h

@@ -4,6 +4,11 @@
 
 #include <dirent.h>
 #include <netdb.h>
+#include <sys/stat.h>
 #define MG_DIRSEP '/'
+#define MG_INT64_FMT "%lld"
+#ifndef MG_PATH_MAX
+#define MG_PATH_MAX 128
+#endif
 
 #endif

src/arch_esp8266.h

@@ -3,25 +3,11 @@
 #if MG_ARCH == MG_ARCH_ESP8266
 
 #include <dirent.h>
+#include <esp_system.h>
+#include <netdb.h>
 #include <stdbool.h>
 #include <sys/time.h>
-#include <user_interface.h>
-
 #define MG_DIRSEP '/'
-#ifndef PATH_MAX
+#define MG_INT64_FMT "%lld"
-#define PATH_MAX 128
-#endif
-#define MG_ENABLE_LWIP 1
-#define LWIP_TIMEVAL_PRIVATE 0  // struct timeval is defined in sys/time.h
-
-#if LWIP_SOCKET
-#include <lwip/sockets.h>
-#else
-#undef LWIP_SOCKET
-#define LWIP_SOCKET 1
-#include <lwip/sockets.h>  // Source sockaddr_in anyway
-#undef LWIP_SOCKET
-#define LWIP_SOCKET 0
-#endif
 
 #endif

src/arch_freertos.h

@@ -9,6 +9,7 @@
 #include <FreeRTOS_Sockets.h>
 #include <stdbool.h>
 
+#define MG_INT64_FMT "%lld"
 #define MG_DIRSEP '/'
 #define IPPROTO_TCP FREERTOS_IPPROTO_TCP
 #define IPPROTO_UDP FREERTOS_IPPROTO_UDP

src/arch_unix.h

@@ -6,6 +6,7 @@
 
 #include <arpa/inet.h>
 #include <dirent.h>
+#include <inttypes.h>
 #include <netdb.h>
 #include <netinet/tcp.h>
 #include <signal.h>
@@ -17,5 +18,6 @@
 #include <unistd.h>
 #define MG_DIRSEP '/'
 #define MG_ENABLE_POSIX 1
+#define MG_INT64_FMT "%" PRId64
 
 #endif

src/arch_win32.h

@@ -7,31 +7,40 @@
 typedef __int64 int64_t;
 typedef unsigned __int64 uint64_t;
 typedef unsigned char uint8_t;
+typedef char int8_t;
 typedef unsigned short uint16_t;
+typedef short int16_t;
 typedef unsigned int uint32_t;
-typedef int bool;
+typedef int int32_t;
-enum { false = 0, true = 1 };
+typedef enum { false = 0, true = 1 } bool;
 #else
 #include <stdbool.h>
 #include <stdint.h>
+#include <ws2tcpip.h>
 #endif
 
 #include <winsock2.h>
+
+// Protect from calls like std::snprintf in app code
+// See https://github.com/cesanta/mongoose/issues/1047
+#ifndef __cplusplus
 #define snprintf _snprintf
 #define vsnprintf _vsnprintf
 #define strdup(x) _strdup(x)
-#define sleep(x) Sleep((x) *1000)
+#endif
+
 typedef int socklen_t;
-#define PATH_MAX MAX_PATH
 #define MG_DIRSEP '\\'
-#define inline __inline
+#ifndef PATH_MAX
+#define PATH_MAX MAX_PATH
+#endif
 #ifndef EINPROGRESS
 #define EINPROGRESS WSAEINPROGRESS
 #endif
 #ifndef EWOULDBLOCK
 #define EWOULDBLOCK WSAEWOULDBLOCK
 #endif
-#define realpath(a, b) _fullpath((b), (a), 512)
+#define realpath(a, b) _fullpath((b), (a), MG_PATH_MAX)
 #ifndef va_copy
 #ifdef __va_copy
 #define va_copy __va_copy
@@ -39,9 +48,10 @@ typedef int socklen_t;
 #define va_copy(x, y) (x) = (y)
 #endif
 #endif
-
 #ifndef S_ISDIR
 #define S_ISDIR(x) (((x) &_S_IFMT) == _S_IFDIR)
 #endif
 
+#define MG_INT64_FMT "%I64d"
+
 #endif

src/config.h

@@ -6,7 +6,7 @@
 
 #if MG_ENABLE_LWIP
 #define MG_ENABLE_SOCKET 0
-#else
+#elif !defined(MG_ENABLE_SOCKET)
 #define MG_ENABLE_SOCKET 1
 #endif
 
@@ -22,6 +22,10 @@
 #define MG_ENABLE_FS 1
 #endif
 
+#ifndef MG_ENABLE_SSI
+#define MG_ENABLE_SSI 0
+#endif
+
 #ifndef MG_ENABLE_IPV6
 #define MG_ENABLE_IPV6 0
 #endif
@@ -42,10 +46,6 @@
 #define MG_ENABLE_DIRECTORY_LISTING 0
 #endif
 
-#ifndef MG_ENABLE_HTTP_DEBUG_ENDPOINT
-#define MG_ENABLE_HTTP_DEBUG_ENDPOINT 0
-#endif
-
 #ifndef MG_ENABLE_SOCKETPAIR
 #define MG_ENABLE_SOCKETPAIR 0
 #endif
@@ -63,3 +63,7 @@
 #ifndef MG_MAX_HTTP_HEADERS
 #define MG_MAX_HTTP_HEADERS 40
 #endif
+
+#ifndef MG_PATH_MAX
+#define MG_PATH_MAX PATH_MAX
+#endif

src/dns.c

@@ -5,15 +5,6 @@
 #include "timer.h"
 #include "util.h"
 
-struct mg_dns_header {
-  uint16_t transaction_id;
-  uint16_t flags;
-  uint16_t num_questions;
-  uint16_t num_answers;
-  uint16_t num_authority_prs;
-  uint16_t num_other_prs;
-};
-
 struct dns_data {
   struct dns_data *next;
   struct mg_connection *c;
@@ -21,82 +12,130 @@ struct dns_data {
   uint16_t txnid;
 };
 
-static void mg_dns_free(struct dns_data **head, struct dns_data *d) {
+static struct dns_data *s_reqs;  // Active DNS requests
-  LIST_DELETE(struct dns_data, head, d);
+
-  // LOG(LL_INFO, ("--> %p %p %d", d, d->c, d->c->fd));
+static void mg_sendnsreq(struct mg_connection *, struct mg_str *, int,
+                         struct mg_dns *, bool);
+
+static void mg_dns_free(struct dns_data *d) {
+  LIST_DELETE(struct dns_data, &s_reqs, d);
   free(d);
 }
 
-void mg_resolve_cancel(struct mg_mgr *mgr, struct mg_connection *c) {
+void mg_resolve_cancel(struct mg_connection *c) {
-  struct dns_data *tmp, *d, **head;
+  struct dns_data *tmp, *d;
-  head = mgr->dnsc == NULL ? NULL : (struct dns_data **) &mgr->dnsc->pfn_data;
+  for (d = s_reqs; d != NULL; d = tmp) {
-  for (d = head == NULL ? NULL : *head; d != NULL; d = tmp) {
     tmp = d->next;
-    if (d->c == c) mg_dns_free(head, d);
+    if (d->c == c) mg_dns_free(d);
   }
 }
 
-static size_t mg_dns_parse_name(const uint8_t *s, const uint8_t *e, size_t off,
+static size_t mg_dns_parse_name_depth(const uint8_t *s, size_t len, size_t ofs,
-                                char *to, size_t tolen, int depth) {
+                                      char *to, size_t tolen, int depth) {
   size_t i = 0, j = 0;
+  if (tolen > 0) to[0] = '\0';
   if (depth > 5) return 0;
-  while (&s[off + i + 1] < e && s[off + i] > 0) {
+  while (ofs + i + 1 < len) {
-    size_t n = s[off + i];
+    size_t n = s[ofs + i];
-    if (n & 0xc0) {
+    if (n == 0) {
-      size_t ptr = (((n & 0x3f) << 8) | s[off + i + 1]) - 12;  // 12 is hdr len
-      if (&s[ptr + 1] < e && (s[ptr] & 0xc0) == 0) {
-        j = mg_dns_parse_name(s, e, ptr, to, tolen, depth + 1);
-      }
       i++;
       break;
     }
-    if (&s[off + i + n + 1] >= e) break;
+    if (n & 0xc0) {
-    if (j > 0 && j < tolen) to[j++] = '.';
+      size_t ptr = (((n & 0x3f) << 8) | s[ofs + i + 1]);  // 12 is hdr len
-    if (j + n < tolen) memcpy(&to[j], &s[off + i + 1], n);
+      if (ptr + 1 < len && (s[ptr] & 0xc0) == 0 &&
+          mg_dns_parse_name_depth(s, len, ptr, to, tolen, depth + 1) == 0)
+        return 0;
+      i += 2;
+      break;
+    }
+    if (ofs + i + n + 1 >= len) return 0;
+    if (j > 0) {
+      if (j < tolen) to[j] = '.';
+      j++;
+    }
+    if (j + n < tolen) memcpy(&to[j], &s[ofs + i + 1], n);
     j += n;
     i += n + 1;
+    if (j < tolen) to[j] = '\0';  // Zero-terminate this chunk
   }
-  if (j < tolen) to[j] = '\0';  // Zero-terminate the name
+  if (tolen > 0) to[tolen - 1] = '\0';  // Make sure make sure it is nul-term
-  to[tolen - 1] = '\0';         // Just in case
   return i;
 }
 
-//       txid  flags numQ  numA  numAP numOP
+size_t mg_dns_parse_name(const uint8_t *s, size_t n, size_t ofs, char *dst,
-// 0000  00 01 81 80 00 01 00 01 00 00 00 00 07 63 65 73  .............ces
+                         size_t dstlen) {
-// 0010  61 6e 74 61 03 63 6f 6d 00 00 01 00 01 c0 0c 00  anta.com........
+  return mg_dns_parse_name_depth(s, n, ofs, dst, dstlen, 0);
-// 0020  01 00 01 00 00 02 57 00 04 94 fb 36 ec           ......W....6.
+}
-int mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *dm) {
+
-  struct mg_dns_header *h = (struct mg_dns_header *) buf;
+size_t mg_dns_parse_rr(const uint8_t *buf, size_t len, size_t ofs,
-  const uint8_t *s = buf + sizeof(*h), *e = &buf[len];
+                       bool is_question, struct mg_dns_rr *rr) {
-  size_t i, j = 0, n, ok = 0;
+  const struct mg_dns_header *h = (struct mg_dns_header *) buf;
-  if (len < sizeof(*h)) return ok;
+  const uint8_t *s = buf + ofs, *e = &buf[len];
+
+  memset(rr, 0, sizeof(*rr));
+  if (len < sizeof(*h)) return 0;  // Too small, headers dont fit
+  if (len > 512) return 0;         //  Too large, we don't expect that
+  if (s >= e) return 0;            //  Overflow
+
+  if ((rr->nlen = (uint16_t) mg_dns_parse_name(buf, len, ofs, NULL, 0)) == 0)
+    return 0;
+  s += rr->nlen + 4;
+  if (s > e) return 0;
+  rr->atype = ((uint16_t) s[-4] << 8) | s[-3];
+  rr->aclass = ((uint16_t) s[-2] << 8) | s[-1];
+  if (is_question) return rr->nlen + 4;
+
+  s += 6;
+  if (s > e) return 0;
+  rr->alen = ((uint16_t) s[-2] << 8) | s[-1];
+  if (s + rr->alen > e) return 0;
+  return rr->nlen + rr->alen + 10;
+}
+
+bool mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *dm) {
+  const struct mg_dns_header *h = (struct mg_dns_header *) buf;
+  struct mg_dns_rr rr;
+  size_t i, n, ofs = sizeof(*h);
+  memset(dm, 0, sizeof(*dm));
+
+  if (len < sizeof(*h)) return 0;                // Too small, headers dont fit
+  if (mg_ntohs(h->num_questions) > 1) return 0;  // Sanity
+  if (mg_ntohs(h->num_answers) > 10) return 0;   // Sanity
+  dm->txnid = mg_ntohs(h->txnid);
+
   for (i = 0; i < mg_ntohs(h->num_questions); i++) {
-    j += mg_dns_parse_name(s, e, j, dm->name, sizeof(dm->name), 0) + 5;
+    if ((n = mg_dns_parse_rr(buf, len, ofs, true, &rr)) == 0) return false;
-    // LOG(LL_INFO, ("QUE [%s]", name));
+    // LOG(LL_INFO, ("Q %zu %zu", ofs, n));
+    ofs += n;
   }
   for (i = 0; i < mg_ntohs(h->num_answers); i++) {
-    j += mg_dns_parse_name(s, e, j, dm->name, sizeof(dm->name), 0) + 9;
+    // LOG(LL_INFO, ("A -- %zu %zu %s", ofs, n, dm->name));
-    // LOG(LL_DEBUG, ("NAME %s", name));
+    if ((n = mg_dns_parse_rr(buf, len, ofs, false, &rr)) == 0) return false;
-    if (&s[j] + 2 > e) break;
+    mg_dns_parse_name(buf, len, ofs, dm->name, sizeof(dm->name));
-    n = ((int) s[j] << 8) | s[j + 1];
+    ofs += n;
-    if (&s[j] + 2 + n > e) break;
+
-    if (n == 4) {
+    if (rr.alen == 4 && rr.atype == 1 && rr.aclass == 1) {
-      dm->txnid = mg_ntohs(h->transaction_id);
+      dm->addr.is_ip6 = false;
-      memcpy(&dm->ipaddr, &s[j + 2], 4);
+      memcpy(&dm->addr.ip, &buf[ofs - 4], 4);
-      ok = 1;
+      dm->resolved = true;
-      break;
+      break;  // Return success
+    } else if (rr.alen == 16 && rr.atype == 28 && rr.aclass == 1) {
+      dm->addr.is_ip6 = true;
+      memcpy(&dm->addr.ip6, &buf[ofs - 16], 16);
+      dm->resolved = true;
+      break;  // Return success
     }
-    j += 2 + n;
   }
-  return ok;
+  return true;
 }
 
 static void dns_cb(struct mg_connection *c, int ev, void *ev_data,
                    void *fn_data) {
-  struct dns_data *d, *tmp, **head = (struct dns_data **) &c->pfn_data;
+  struct dns_data *d, *tmp;
   if (ev == MG_EV_POLL) {
     unsigned long now = *(unsigned long *) ev_data;
-    for (d = (struct dns_data *) fn_data; d != NULL; d = tmp) {
+    for (d = s_reqs; d != NULL; d = tmp) {
       tmp = d->next;
       // LOG(LL_DEBUG, ("%lu %lu dns poll", d->expire, now));
       if (now > d->expire) mg_error(d->c, "DNS timeout");
@@ -104,41 +143,62 @@ static void dns_cb(struct mg_connection *c, int ev, void *ev_data,
   } else if (ev == MG_EV_READ) {
     struct mg_dns_message dm;
     int resolved = 0;
-    if (mg_dns_parse(c->recv.buf, c->recv.len, &dm)) {
+    if (mg_dns_parse(c->recv.buf, c->recv.len, &dm) == false) {
-      for (d = (struct dns_data *) c->pfn_data; d != NULL; d = tmp) {
+      char *s = mg_hexdump(c->recv.buf, c->recv.len);
+      LOG(LL_ERROR, ("Unexpected DNS response:\n%s\n", s));
+      free(s);
+    } else {
+      LOG(LL_VERBOSE_DEBUG, ("%s %d", dm.name, dm.resolved));
+      for (d = s_reqs; d != NULL; d = tmp) {
         tmp = d->next;
-        // LOG(LL_INFO, ("d %p %p", d, tmp));
+        // LOG(LL_INFO, ("d %p %hu %hu", d, d->txnid, dm.txnid));
         if (dm.txnid != d->txnid) continue;
         if (d->c->is_resolving) {
           d->c->is_resolving = 0;
-          d->c->peer.ip = dm.ipaddr;
+          if (dm.resolved) {
-          mg_connect_resolved(d->c);
+#if MG_ENABLE_LOG
-          mg_dns_free(head, d);
+            char buf[100];
+#endif
+            dm.addr.port = d->c->peer.port;  // Save port
+            d->c->peer = dm.addr;            // Copy resolved address
+            LOG(LL_DEBUG, ("%lu %s resolved to %s", d->c->id, dm.name,
+                           mg_ntoa(&d->c->peer, buf, sizeof(buf))));
+            mg_connect_resolved(d->c);
+#if MG_ENABLE_IPV6
+          } else if (dm.addr.is_ip6 == false && dm.name[0] != '\0') {
+            struct mg_str x = mg_str(dm.name);
+            mg_sendnsreq(d->c, &x, c->mgr->dnstimeout, &c->mgr->dns6, true);
+#endif
+          } else {
+            mg_error(d->c, "%s DNS lookup failed", dm.name);
+          }
         } else {
-          LOG(LL_ERROR, ("%p already resolved", d->c->fd));
+          LOG(LL_ERROR, ("%lu already resolved", d->c->id));
         }
+        mg_dns_free(d);
         resolved = 1;
       }
     }
     if (!resolved) LOG(LL_ERROR, ("stray DNS reply"));
     c->recv.len = 0;
   } else if (ev == MG_EV_CLOSE) {
-    for (d = *head; d != NULL; d = tmp) {
+    for (d = s_reqs; d != NULL; d = tmp) {
       tmp = d->next;
-      mg_dns_free(head, d);
+      mg_dns_free(d);
     }
   }
+  (void) fn_data;
 }
 
 void mg_dns_send(struct mg_connection *c, const struct mg_str *name,
-                 uint16_t txnid) {
+                 uint16_t txnid, bool ipv6) {
   struct {
     struct mg_dns_header header;
     uint8_t data[256];
   } pkt;
   size_t i, n;
   memset(&pkt, 0, sizeof(pkt));
-  pkt.header.transaction_id = mg_htons(txnid);
+  pkt.header.txnid = mg_htons(txnid);
   pkt.header.flags = mg_htons(0x100);
   pkt.header.num_questions = mg_htons(1);
   for (i = n = 0; i < sizeof(pkt.data) - 5; i++) {
@@ -151,6 +211,9 @@ void mg_dns_send(struct mg_connection *c, const struct mg_str *name,
   }
   memcpy(&pkt.data[n], "\x00\x00\x01\x00\x01", 5);  // A query
   n += 5;
+  if (ipv6) pkt.data[n - 3] = 0x1c;  // AAAA query
+  // memcpy(&pkt.data[n], "\xc0\x0c\x00\x1c\x00\x01", 6);  // AAAA query
+  // n += 6;
   mg_send(c, &pkt, sizeof(pkt.header) + n);
 #if 0
   // Immediately after A query, send AAAA query. Whatever reply comes first,
@@ -161,46 +224,42 @@ void mg_dns_send(struct mg_connection *c, const struct mg_str *name,
 #endif
 }
 
-void mg_resolve(struct mg_mgr *mgr, struct mg_connection *c,
+static void mg_sendnsreq(struct mg_connection *c, struct mg_str *name, int ms,
-                struct mg_str *name, int ms) {
+                         struct mg_dns *dnsc, bool ipv6) {
   struct dns_data *d = NULL;
-  int resolved = mg_aton(name->ptr, &c->peer.ip);
+  if (dnsc->url == NULL) {
-
+    mg_error(c, "DNS server URL is NULL. Call mg_mgr_init()");
-  // Try to parse name as IP address
+  } else if (dnsc->c == NULL) {
-  if (mg_vcmp(name, "localhost") == 0) {
+    dnsc->c = mg_connect(c->mgr, dnsc->url, NULL, NULL);
-    resolved = 1;
+    if (dnsc->c != NULL) {
-    c->peer.ip = mg_htonl(0x7f000001);
+      dnsc->c->pfn = dns_cb;
+      snprintf(dnsc->c->label, sizeof(dnsc->c->label), "%s", "DNS");
+      // dnsc->c->is_hexdumping = 1;
+    }
   }
+  if (dnsc->c == NULL) {
+    mg_error(c, "resolver");
+  } else if ((d = (struct dns_data *) calloc(1, sizeof(*d))) == NULL) {
+    mg_error(c, "resolve OOM");
+  } else {
+    d->txnid = s_reqs ? s_reqs->txnid + 1 : 1;
+    d->next = s_reqs;
+    s_reqs = d;
+    d->expire = mg_millis() + ms;
+    d->c = c;
+    c->is_resolving = 1;
+    LOG(LL_VERBOSE_DEBUG, ("%lu resolving %.*s, txnid %hu", c->id,
+                           (int) name->len, name->ptr, d->txnid));
+    mg_dns_send(dnsc->c, name, d->txnid, ipv6);
+  }
+}
 
-  if (resolved) {
+void mg_resolve(struct mg_connection *c, struct mg_str *name, int ms) {
+  if (mg_aton(*name, &c->peer)) {
     // name is an IP address, do not fire name resolution
     mg_connect_resolved(c);
   } else {
     // name is not an IP, send DNS resolution request
-    if (mgr->dnsc == NULL) {
+    mg_sendnsreq(c, name, ms, &c->mgr->dns4, false);
-      const char *srv = mgr->dnsserver ? mgr->dnsserver : "udp://8.8.8.8:53";
-      mgr->dnsc = mg_connect(mgr, srv, NULL, NULL);
-      if (mgr->dnsc != NULL) {
-        mgr->dnsc->pfn = dns_cb;
-        // mgr->dnsc->is_hexdumping = 1;
-        snprintf(mgr->dnsc->label, sizeof(mgr->dnsc->label), "%s", "RESOLVER");
-      }
-    }
-    if (mgr->dnsc == NULL) {
-      mg_error(c, "resolver");
-    } else if ((d = (struct dns_data *) calloc(1, sizeof(*d))) == NULL) {
-      mg_error(c, "resolve OOM");
-    } else {
-      struct dns_data **head = (struct dns_data **) &mgr->dnsc->pfn_data;
-      d->txnid = *head ? (*head)->txnid + 1 : 1;
-      d->next = *head;
-      *head = d;
-      d->expire = mg_millis() + ms;
-      d->c = c;
-      c->is_resolving = 1;
-      LOG(LL_DEBUG, ("%p resolving %.*s, txnid %hu", c->fd, (int) name->len,
-                     name->ptr, d->txnid));
-      mg_dns_send(mgr->dnsc, name, d->txnid);
-    }
   }
 }

src/dns.h

@@ -3,12 +3,37 @@
 #include "net.h"
 #include "str.h"
 
+// Mongoose sends DNS queries that contain only one question:
+// either A (IPv4) or AAAA (IPv6) address lookup.
+// Therefore, we expect zero or one answer.
+// If `resolved` is true, then `addr` contains resolved IPv4 or IPV6 address.
 struct mg_dns_message {
-  uint16_t txnid;   // Transaction ID
+  uint16_t txnid;       // Transaction ID
-  uint32_t ipaddr;  // Resolved IPv4 address
+  bool resolved;        // Resolve successful, addr is set
-  char name[256];   // Host name
+  struct mg_addr addr;  // Resolved address
+  char name[256];       // Host name
 };
 
-void mg_resolve(struct mg_mgr *, struct mg_connection *, struct mg_str *, int);
+struct mg_dns_header {
-void mg_resolve_cancel(struct mg_mgr *, struct mg_connection *);
+  uint16_t txnid;  // Transaction ID
-int mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *);
+  uint16_t flags;
+  uint16_t num_questions;
+  uint16_t num_answers;
+  uint16_t num_authority_prs;
+  uint16_t num_other_prs;
+};
+
+// DNS resource record
+struct mg_dns_rr {
+  uint16_t nlen;    // Name or pointer length
+  uint16_t atype;   // Address type
+  uint16_t aclass;  // Address class
+  uint16_t alen;    // Address length
+};
+
+void mg_resolve(struct mg_connection *, struct mg_str *, int);
+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 *);
+size_t mg_dns_decode_name(const uint8_t *, size_t, size_t, char *, size_t);

src/event.c

@@ -14,7 +14,7 @@ void mg_error(struct mg_connection *c, const char *fmt, ...) {
   va_start(ap, fmt);
   mg_vasprintf(&buf, sizeof(mem), fmt, ap);
   va_end(ap);
-  LOG(LL_ERROR, ("%p %s", c->fd, buf));
+  LOG(LL_ERROR, ("%lu %s", c->id, buf));
   mg_call(c, MG_EV_ERROR, buf);
   if (buf != mem) free(buf);
   c->is_closing = 1;

src/event.h

@@ -3,35 +3,26 @@
 struct mg_connection;
 typedef void (*mg_event_handler_t)(struct mg_connection *, int ev,
                                    void *ev_data, void *fn_data);
-#if 0
-struct mg_fn {
-  struct mg_fn *next;
-  mg_event_handler_t fn;
-  void *fn_data;
-};
-
-void mg_fn_add(struct mg_connection *c, mg_event_handler_t fn, void *fn_data);
-void mg_fn_del(struct mg_connection *c, mg_event_handler_t fn);
-#endif
-
 void mg_call(struct mg_connection *c, int ev, void *ev_data);
 void mg_error(struct mg_connection *c, const char *fmt, ...);
 
 enum {
-  MG_EV_ERROR,     // Error                        char *error_message
+  MG_EV_ERROR,       // Error                        char *error_message
-  MG_EV_POLL,      // mg_mgr_poll iteration        unsigned long *millis
+  MG_EV_POLL,        // mg_mgr_poll iteration        unsigned long *millis
-  MG_EV_RESOLVE,   // Host name is resolved        NULL
+  MG_EV_RESOLVE,     // Host name is resolved        NULL
-  MG_EV_CONNECT,   // Connection established       NULL
+  MG_EV_CONNECT,     // Connection established       NULL
-  MG_EV_ACCEPT,    // Connection accepted          NULL
+  MG_EV_ACCEPT,      // Connection accepted          NULL
-  MG_EV_READ,      // Data received from socket    struct mg_str *
+  MG_EV_READ,        // Data received from socket    struct mg_str *
-  MG_EV_WRITE,     // Data written to socket       int *num_bytes_written
+  MG_EV_WRITE,       // Data written to socket       int *num_bytes_written
-  MG_EV_CLOSE,     // Connection closed            NULL
+  MG_EV_CLOSE,       // Connection closed            NULL
-  MG_EV_HTTP_MSG,  // HTTP request/response        struct mg_http_message *
+  MG_EV_HTTP_MSG,    // HTTP request/response        struct mg_http_message *
-  MG_EV_WS_OPEN,    // Websocket handshake done     NULL
+  MG_EV_HTTP_CHUNK,  // HTTP chunk (partial msg)     struct mg_http_message *
-  MG_EV_WS_MSG,     // Websocket message received   struct mg_ws_message *
+  MG_EV_WS_OPEN,     // Websocket handshake done     struct mg_http_message *
-  MG_EV_MQTT_MSG,   // MQTT message                 struct mg_mqtt_message *
+  MG_EV_WS_MSG,      // Websocket msg, text or bin   struct mg_ws_message *
-  MG_EV_MQTT_OPEN,  // MQTT CONNACK received        int *connack_status_code
+  MG_EV_WS_CTL,      // Websocket control msg        struct mg_ws_message *
-  MG_EV_SNTP_TIME,  // SNTP time received           struct timeval *
+  MG_EV_MQTT_CMD,    // MQTT low-level command       struct mg_mqtt_message *
-  MG_EV_USER,       // Starting ID for user events
+  MG_EV_MQTT_MSG,    // MQTT PUBLISH received        struct mg_mqtt_message *
+  MG_EV_MQTT_OPEN,   // MQTT CONNACK received        int *connack_status_code
+  MG_EV_SNTP_TIME,   // SNTP time received           struct timeval *
+  MG_EV_USER,        // Starting ID for user events
 };
-

src/http.c

@@ -1,18 +1,14 @@
-#include "http.h"
 #include "arch.h"
 #include "base64.h"
+#include "http.h"
 #include "log.h"
 #include "net.h"
 #include "private.h"
+#include "ssi.h"
 #include "util.h"
 #include "version.h"
 #include "ws.h"
 
-struct http_data {
-  void *old_pfn_data;  // Previous pfn_data
-  FILE *fp;            // For static file serving
-};
-
 // Multipart POST example:
 // https://gist.github.com/cpq/b8dd247571e6ee9c54ef7e8dfcfecf48
 
@@ -34,7 +30,7 @@ void mg_http_bauth(struct mg_connection *c, const char *user,
     c->send.len += 21 + n + 2;
     memcpy(&c->send.buf[c->send.len - 2], "\r\n", 2);
   } else {
-    LOG(LL_ERROR, ("%p %s cannot resize iobuf %d->%d ", c->fd, c->label,
+    LOG(LL_ERROR, ("%lu %s cannot resize iobuf %d->%d ", c->id, c->label,
                    (int) c->send.size, (int) need));
   }
 }
@@ -62,7 +58,7 @@ int mg_http_get_var(const struct mg_str *buf, const char *name, char *dst,
         s = (const char *) memchr(p, '&', (size_t)(e - p));
         if (s == NULL) s = e;
         len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1);
-        if (len == -1) len = -3;  // Failed to decode
+        if (len < 0) len = -3;  // Failed to decode
         break;
       }
     }
@@ -90,7 +86,7 @@ int mg_url_decode(const char *src, size_t src_len, char *dst, size_t dst_len,
     }
   }
   if (j < dst_len) dst[j] = '\0';  // Null-terminate the destination
-  return i >= src_len ? (int) j : -1;
+  return i >= src_len && j < dst_len ? (int) j : -1;
 }
 
 int mg_http_get_request_len(const unsigned char *buf, size_t buf_len) {
@@ -105,12 +101,12 @@ int mg_http_get_request_len(const unsigned char *buf, size_t buf_len) {
   return 0;
 }
 
-static const char *skip(const char *s, const char *end, const char *delims,
+static const char *skip(const char *s, const char *e, const char *d,
                         struct mg_str *v) {
   v->ptr = s;
-  while (s < end && strchr(delims, *(unsigned char *) s) == NULL) s++;
+  while (s < e && *s != '\n' && strchr(d, *s) == NULL) s++;
   v->len = s - v->ptr;
-  while (s < end && strchr(delims, *(unsigned char *) s) != NULL) s++;
+  while (s < e && strchr(d, *s) != NULL) s++;
   return s;
 }
 
@@ -149,15 +145,19 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
   memset(hm, 0, sizeof(*hm));
   if (req_len <= 0) return req_len;
 
-  hm->message.ptr = s;
+  hm->message.ptr = hm->head.ptr = s;
-  hm->body.ptr = s + req_len;
+  hm->body.ptr = end;
+  hm->head.len = req_len;
+  hm->chunk.ptr = end;
   hm->message.len = hm->body.len = (size_t) ~0;  // Set body length to infinite
 
   // Parse request line
   s = skip(s, end, " ", &hm->method);
   s = skip(s, end, " ", &hm->uri);
   s = skip(s, end, "\r\n", &hm->proto);
-  if (hm->uri.ptr <= hm->method.ptr || hm->proto.ptr <= hm->uri.ptr) return -1;
+
+  // Sanity check
+  if (hm->method.len == 0 || hm->uri.len == 0 || hm->proto.len == 0) return -1;
 
   // If URI contains '?' character, setup query string
   if ((qs = (const char *) memchr(hm->uri.ptr, '?', hm->uri.len)) != NULL) {
@@ -169,7 +169,7 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
   mg_http_parse_headers(s, end, hm->headers,
                         sizeof(hm->headers) / sizeof(hm->headers[0]));
   if ((cl = mg_http_get_header(hm, "Content-Length")) != NULL) {
-    hm->body.len = (size_t) mg_to64(cl->ptr);
+    hm->body.len = (size_t) mg_to64(*cl);
     hm->message.len = req_len + hm->body.len;
   }
 
@@ -193,6 +193,13 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
     hm->message.len = req_len;
   }
 
+  // The 204 (No content) responses also have 0 body length
+  if (hm->body.len == (size_t) ~0 && is_response &&
+      mg_vcasecmp(&hm->uri, "204") == 0) {
+    hm->body.len = 0;
+    hm->message.len = req_len;
+  }
+
   return req_len;
 }
 
@@ -219,34 +226,31 @@ void mg_http_write_chunk(struct mg_connection *c, const char *buf, size_t len) {
   mg_send(c, "\r\n", 2);
 }
 
-void mg_http_reply(struct mg_connection *c, int code, const char *fmt, ...) {
+void mg_http_reply(struct mg_connection *c, int code, const char *headers,
+                   const char *fmt, ...) {
   char mem[100], *buf = mem;
   va_list ap;
   int len;
   va_start(ap, fmt);
   len = mg_vasprintf(&buf, sizeof(mem), fmt, ap);
   va_end(ap);
-  mg_printf(c,
+  mg_printf(c, "HTTP/1.1 %d OK\r\n%sContent-Length: %d\r\n\r\n", code,
-            "HTTP/1.1 %d OK\r\nContent-Type: text/plain\r\n"
+            headers == NULL ? "" : headers, len);
-            "Content-Length: %d\r\n\r\n",
-            code, len);
   mg_send(c, buf, len);
   if (buf != mem) free(buf);
 }
 
+#if MG_ENABLE_FS
 static void http_cb(struct mg_connection *, int, void *, void *);
 static void restore_http_cb(struct mg_connection *c) {
-  struct http_data *d = (struct http_data *) c->pfn_data;
+  if (c->pfn_data != NULL) fclose((FILE *) c->pfn_data);
-  if (d->fp != NULL) fclose(d->fp);
+  c->pfn_data = NULL;
-  c->pfn_data = d->old_pfn_data;
   c->pfn = http_cb;
-  free(d);
 }
 
-#if MG_ENABLE_FS
+char *mg_http_etag(char *buf, size_t len, mg_stat_t *st) {
-char *mg_http_etag(char *buf, size_t len, struct stat *st) {
+  snprintf(buf, len, "\"%lx." MG_INT64_FMT "\"", (unsigned long) st->st_mtime,
-  snprintf(buf, len, "\"%lx.%lu\"", (unsigned long) st->st_mtime,
+           (int64_t) st->st_size);
-           (unsigned long) st->st_size);
   return buf;
 }
 
@@ -256,7 +260,7 @@ int mg_http_upload(struct mg_connection *c, struct mg_http_message *hm,
   mg_http_get_var(&hm->query, "offset", offset, sizeof(offset));
   mg_http_get_var(&hm->query, "name", name, sizeof(name));
   if (name[0] == '\0') {
-    mg_http_reply(c, 400, "%s", "name required");
+    mg_http_reply(c, 400, "", "%s", "name required");
     return -1;
   } else {
     FILE *fp;
@@ -264,13 +268,13 @@ int mg_http_upload(struct mg_connection *c, struct mg_http_message *hm,
     snprintf(path, sizeof(path), "%s%c%s", dir, MG_DIRSEP, name);
     LOG(LL_DEBUG,
         ("%p %d bytes @ %d [%s]", c->fd, (int) hm->body.len, (int) oft, name));
-    if ((fp = fopen(path, oft == 0 ? "wb" : "a")) == NULL) {
+    if ((fp = mg_fopen(path, oft == 0 ? "wb" : "ab")) == NULL) {
-      mg_http_reply(c, 400, "fopen(%s): %d", name, errno);
+      mg_http_reply(c, 400, "", "fopen(%s): %d", name, errno);
       return -2;
     } else {
       fwrite(hm->body.ptr, 1, hm->body.len, fp);
       fclose(fp);
-      mg_http_reply(c, 200, "");
+      mg_http_reply(c, 200, "", "");
       return hm->body.len;
     }
   }
@@ -279,12 +283,12 @@ int mg_http_upload(struct mg_connection *c, struct mg_http_message *hm,
 static void static_cb(struct mg_connection *c, int ev, void *ev_data,
                       void *fn_data) {
   if (ev == MG_EV_WRITE || ev == MG_EV_POLL) {
-    struct http_data *d = (struct http_data *) fn_data;
+    FILE *fp = (FILE *) fn_data;
     // Read to send IO buffer directly, avoid extra on-stack buffer
     size_t n, max = 2 * MG_IO_SIZE;
     if (c->send.size < max) mg_iobuf_resize(&c->send, max);
     if (c->send.len >= c->send.size) return;  // Rate limit
-    n = fread(c->send.buf + c->send.len, 1, c->send.size - c->send.len, d->fp);
+    n = fread(c->send.buf + c->send.len, 1, c->send.size - c->send.len, fp);
     if (n > 0) c->send.len += n;
     if (c->send.len < c->send.size) restore_http_cb(c);
   } else if (ev == MG_EV_CLOSE) {
@@ -294,37 +298,92 @@ static void static_cb(struct mg_connection *c, int ev, void *ev_data,
 }
 
 static const char *guess_content_type(const char *filename) {
-  int n = (int) strlen(filename);
+  size_t n = strlen(filename);
-  if (mg_globmatch("#.html", 6, filename, n)) return "text/html";
+#define MIME_ENTRY(_ext, _type) \
-  if (mg_globmatch("#.css", 5, filename, n)) return "text/css";
+  { _ext, sizeof(_ext) - 1, _type }
-  if (mg_globmatch("#.js", 4, filename, n)) return "text/javascript";
+  const struct {
-  return "text/plain";
+    const char *ext;
+    size_t ext_len;
+    const char *type;
+  } * t, types[] = {
+             MIME_ENTRY("html", "text/html; charset=utf-8"),
+             MIME_ENTRY("htm", "text/html; charset=utf-8"),
+             MIME_ENTRY("shtml", "text/html; charset=utf-8"),
+             MIME_ENTRY("css", "text/css"),
+             MIME_ENTRY("js", "text/javascript"),
+             MIME_ENTRY("mjs", "text/javascript"),
+             MIME_ENTRY("json", "application/json"),
+             MIME_ENTRY("ico", "image/x-icon"),
+             MIME_ENTRY("gif", "image/gif"),
+             MIME_ENTRY("jpg", "image/jpeg"),
+             MIME_ENTRY("jpeg", "image/jpeg"),
+             MIME_ENTRY("png", "image/png"),
+             MIME_ENTRY("svg", "image/svg+xml"),
+             MIME_ENTRY("txt", "text/plain; charset=utf-8"),
+             MIME_ENTRY("wav", "audio/wav"),
+             MIME_ENTRY("mp3", "audio/mpeg"),
+             MIME_ENTRY("mid", "audio/mid"),
+             MIME_ENTRY("ogg", "application/ogg"),
+             MIME_ENTRY("xml", "application/xml"),
+             MIME_ENTRY("ttf", "font/ttf"),
+             MIME_ENTRY("json", "application/json"),
+             MIME_ENTRY("xsl", "application/xml"),
+             MIME_ENTRY("doc", "application/msword"),
+             MIME_ENTRY("exe", "application/octet-stream"),
+             MIME_ENTRY("zip", "application/zip"),
+             MIME_ENTRY("xls", "application/excel"),
+             MIME_ENTRY("tgz", "application/tar-gz"),
+             MIME_ENTRY("tar", "application/tar"),
+             MIME_ENTRY("gz", "application/gzip"),
+             MIME_ENTRY("rar", "application/rar"),
+             MIME_ENTRY("rtf", "application/rtf"),
+             MIME_ENTRY("pdf", "application/pdf"),
+             MIME_ENTRY("mpg", "video/mpeg"),
+             MIME_ENTRY("webm", "video/webm"),
+             MIME_ENTRY("mpeg", "video/mpeg"),
+             MIME_ENTRY("mov", "video/quicktime"),
+             MIME_ENTRY("mp4", "video/mp4"),
+             MIME_ENTRY("avi", "video/x-msvideo"),
+             MIME_ENTRY("csv", "text/csv"),
+             MIME_ENTRY("bmp", "image/bmp"),
+             MIME_ENTRY("bin", "application/octet-stream"),
+             MIME_ENTRY("wasm", "application/wasm"),
+             {NULL, 0, NULL},
+         };
+
+  for (t = types; t->ext != NULL; t++) {
+    if (n < t->ext_len + 2) continue;
+    if (mg_ncasecmp(t->ext, &filename[n - t->ext_len], t->ext_len)) continue;
+    return t->type;
+  }
+  return "text/plain; charset=utf-8";
 }
 
 void mg_http_serve_file(struct mg_connection *c, struct mg_http_message *hm,
-                        const char *path, const char *mime) {
+                        const char *path, const char *mime, const char *hdrs) {
   struct mg_str *inm = mg_http_get_header(hm, "If-None-Match");
-  struct stat st;
+  mg_stat_t st;
-  FILE *fp = fopen(path, "rb");
   char etag[64];
-  if (fp == NULL || stat(path, &st) != 0 ||
+  FILE *fp = mg_fopen(path, "rb");
+  if (fp == NULL || mg_stat(path, &st) != 0 ||
       mg_http_etag(etag, sizeof(etag), &st) != etag) {
-    mg_http_reply(c, 404, "%s", "Not found\n");
+    LOG(LL_DEBUG,
+        ("404 [%.*s] [%s] %p", (int) hm->uri.len, hm->uri.ptr, path, fp));
+    mg_http_reply(c, 404, "", "%s", "Not found\n");
+    if (fp != NULL) fclose(fp);
   } else if (inm != NULL && mg_vcasecmp(inm, etag) == 0) {
+    fclose(fp);
     mg_printf(c, "HTTP/1.1 304 Not Modified\r\nContent-Length: 0\r\n\r\n");
   } else {
     mg_printf(c,
               "HTTP/1.1 200 OK\r\nContent-Type: %s\r\n"
-              "Etag: %s\r\nContent-Length: %lu\r\n\r\n",
+              "Etag: %s\r\nContent-Length: " MG_INT64_FMT "\r\n%s\r\n",
-              mime, etag, (unsigned long) st.st_size);
+              mime, etag, (int64_t) st.st_size, hdrs ? hdrs : "");
     if (mg_vcasecmp(&hm->method, "HEAD") == 0) {
       fclose(fp);
     } else {
-      struct http_data *d = (struct http_data *) calloc(1, sizeof(*d));
-      d->fp = fp;
-      d->old_pfn_data = c->pfn_data;
       c->pfn = static_cb;
-      c->pfn_data = d;
+      c->pfn_data = fp;
     }
   }
 }
@@ -333,21 +392,23 @@ void mg_http_serve_file(struct mg_connection *c, struct mg_http_message *hm,
     MG_ARCH == MG_ARCH_FREERTOS
 char *realpath(const char *src, char *dst) {
   int len = strlen(src);
-  if (len > PATH_MAX - 1) len = PATH_MAX - 1;
+  if (len > MG_PATH_MAX - 1) len = MG_PATH_MAX - 1;
   strncpy(dst, src, len);
   dst[len] = '\0';
+  LOG(LL_DEBUG, ("[%s] -> [%s]", src, dst));
   return dst;
 }
 #endif
 
-// Try to avoid dirent API
+// Allow user to override this function
-static int mg_is_dir(const char *path) {
+bool mg_is_dir(const char *path) WEAK;
+bool mg_is_dir(const char *path) {
 #if MG_ARCH == MG_ARCH_FREERTOS
   struct FF_STAT st;
   return (ff_stat(path, &st) == 0) && (st.st_mode & FF_IFDIR);
 #else
-  struct stat st;
+  mg_stat_t st;
-  return (stat(path, &st) == 0) && (st.st_mode & S_IFDIR);
+  return mg_stat(path, &st) == 0 && S_ISDIR(st.st_mode);
 #endif
 }
 
@@ -367,7 +428,6 @@ typedef struct win32_dir {
 int gettimeofday(struct timeval *tv, void *tz) {
   FILETIME ft;
   unsigned __int64 tmpres = 0;
-  static int tzflag = 0;
 
   if (tv != NULL) {
     GetSystemTimeAsFileTime(&ft);
@@ -379,6 +439,7 @@ int gettimeofday(struct timeval *tv, void *tz) {
     tv->tv_sec = (long) (tmpres / 1000000UL);
     tv->tv_usec = (long) (tmpres % 1000000UL);
   }
+  (void) tz;
   return 0;
 }
 
@@ -410,7 +471,7 @@ DIR *opendir(const char *name) {
 
   if (name == NULL) {
     SetLastError(ERROR_BAD_ARGUMENTS);
-  } else if ((d = malloc(sizeof(*d))) == NULL) {
+  } else if ((d = (DIR *) malloc(sizeof(*d))) == NULL) {
     SetLastError(ERROR_NOT_ENOUGH_MEMORY);
   } else {
     to_wchar(name, wpath, sizeof(wpath) / sizeof(wpath[0]));
@@ -462,10 +523,10 @@ struct dirent *readdir(DIR *d) {
 }
 #endif
 
-static void printdirentry(struct mg_connection *c, struct mg_http_message *hm,
+static void printdirentry(struct mg_connection *c, const char *name,
-                          const char *name, struct stat *stp) {
+                          mg_stat_t *stp) {
-  char size[64], mod[64];  //, path[PATH_MAX];
+  char size[64], mod[64], path[MG_PATH_MAX];
-  int is_dir = S_ISDIR(stp->st_mode);
+  int is_dir = S_ISDIR(stp->st_mode), n = 0;
   const char *slash = is_dir ? "/" : "";
 
   if (is_dir) {
@@ -482,96 +543,156 @@ static void printdirentry(struct mg_connection *c, struct mg_http_message *hm,
     }
   }
   strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&stp->st_mtime));
-  // mg_escape(file_name, path, sizeof(path));
+  n = mg_url_encode(name, strlen(name), path, sizeof(path));
-  // href = mg_url_encode(mg_mk_str(file_name));
+  mg_printf(c,
-  mg_http_printf_chunk(
+            "  <tr><td><a href=\"%.*s%s\">%s%s</a></td>"
-      c,
+            "<td>%s</td><td>%s</td></tr>\n",
-      "<tr><td><a href=\"%.*s%s%s\">%s%s</a></td><td>%s</td><td>%s</td></tr>",
+            n, path, slash, name, slash, mod, size);
-      (int) hm->uri.len, hm->uri.ptr, name, slash, name, slash, mod, size);
-  // free((void *) href.p);
 }
 
 static void listdir(struct mg_connection *c, struct mg_http_message *hm,
                     char *dir) {
-  char path[PATH_MAX + 1], *p = &dir[strlen(dir) - 1];
+  char path[MG_PATH_MAX], *p = &dir[strlen(dir) - 1], tmp[10];
   struct dirent *dp;
   DIR *dirp;
+  static const char *sort_js_code =
+      "<script>function srt(tb, sc, so, d) {"
+      "var tr = Array.prototype.slice.call(tb.rows, 0),"
+      "tr = tr.sort(function (a, b) { var c1 = a.cells[sc], c2 = b.cells[sc],"
+      "n1 = c1.getAttribute('name'), n2 = c2.getAttribute('name'), "
+      "t1 = a.cells[2].getAttribute('name'), "
+      "t2 = b.cells[2].getAttribute('name'); "
+      "return so * (t1 < 0 && t2 >= 0 ? -1 : t2 < 0 && t1 >= 0 ? 1 : "
+      "n1 ? parseInt(n2) - parseInt(n1) : "
+      "c1.textContent.trim().localeCompare(c2.textContent.trim())); });";
+  static const char *sort_js_code2 =
+      "for (var i = 0; i < tr.length; i++) tb.appendChild(tr[i]); "
+      "if (!d) window.location.hash = ('sc=' + sc + '&so=' + so); "
+      "};"
+      "window.onload = function() {"
+      "var tb = document.getElementById('tb');"
+      "var m = /sc=([012]).so=(1|-1)/.exec(window.location.hash) || [0, 2, 1];"
+      "var sc = m[1], so = m[2]; document.onclick = function(ev) { "
+      "var c = ev.target.rel; if (c) {if (c == sc) so *= -1; srt(tb, c, so); "
+      "sc = c; ev.preventDefault();}};"
+      "srt(tb, sc, so, true);"
+      "}"
+      "</script>";
 
   while (p > dir && *p != '/') *p-- = '\0';
-  // LOG(LL_DEBUG, ("%p [%s]", c->fd, dir));
   if ((dirp = (opendir(dir))) != NULL) {
-    mg_printf(c, "%s\r\n", "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n");
+    size_t off, n;
-    mg_http_printf_chunk(
+    mg_printf(c, "%s\r\n",
-        c,
+              "HTTP/1.1 200 OK\r\n"
-        "<!DOCTYPE html><html><head><title>Index of %.*s</title>"
+              "Content-Type: text/html; charset=utf-8\r\n"
-        "<style>th,td {text-align: left; padding-right: 1em; "
+              "Content-Length:         \r\n");
-        "font-family: monospace; }</style></head>"
+    off = c->send.len;  // Start of body
-        "<body><h1>Index of %.*s</h1><table cellpadding=\"0\"><thead>"
+    mg_printf(c,
-        "<tr><th>Name</th><th>Modified</th><th>Size</th></tr>"
+              "<!DOCTYPE html><html><head><title>Index of %.*s</title>%s%s"
-        "<tr><td colspan=\"3\"><hr></td></tr></thead><tbody>",
+              "<style>th,td {text-align: left; padding-right: 1em; "
-        (int) hm->uri.len, hm->uri.ptr, (int) hm->uri.len, hm->uri.ptr);
+              "font-family: monospace; }</style></head>"
+              "<body><h1>Index of %.*s</h1><table cellpadding=\"0\"><thead>"
+              "<tr><th><a href=\"#\" rel=\"0\">Name</a></th><th>"
+              "<a href=\"#\" rel=\"1\">Modified</a></th>"
+              "<th><a href=\"#\" rel=\"2\">Size</a></th></tr>"
+              "<tr><td colspan=\"3\"><hr></td></tr>"
+              "</thead>"
+              "<tbody id=\"tb\">\n",
+              (int) hm->uri.len, hm->uri.ptr, sort_js_code, sort_js_code2,
+              (int) hm->uri.len, hm->uri.ptr);
+
     while ((dp = readdir(dirp)) != NULL) {
-      struct stat st;
+      mg_stat_t st;
+      const char *sep = dp->d_name[0] == MG_DIRSEP ? "/" : "";
       // Do not show current dir and hidden files
       if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue;
-      snprintf(path, sizeof(path), "%s/%s", dir, dp->d_name);
+      // SPIFFS can report "/foo.txt" in the dp->d_name
-      if (stat(path, &st) != 0) {
+      if (snprintf(path, sizeof(path), "%s%s%s", dir, sep, dp->d_name) < 0) {
-        LOG(LL_ERROR, ("%p stat(%s): %d", c->fd, path, errno));
+        LOG(LL_ERROR, ("%s truncated", dp->d_name));
-        continue;
+      } else if (mg_stat(path, &st) != 0) {
+        LOG(LL_ERROR, ("%lu stat(%s): %d", c->id, path, errno));
+      } else {
+        printdirentry(c, dp->d_name, &st);
       }
-      printdirentry(c, hm, dp->d_name, &st);
     }
     closedir(dirp);
-    mg_http_printf_chunk(
+    mg_printf(c,
-        c,
+              "</tbody><tfoot><tr><td colspan=\"3\"><hr></td></tr></tfoot>"
-        "</tbody><tfoot><tr><td colspan=\"3\"><hr></td></tr></tfoot>"
+              "</table><address>Mongoose v.%s</address></body></html>\n",
-        "</table><address>Mongoose v.%s</address></body></html>",
+              MG_VERSION);
-        MG_VERSION);
+    n = snprintf(tmp, sizeof(tmp), "%lu", (unsigned long) (c->send.len - off));
-    mg_http_write_chunk(c, "", 0);
+    memcpy(c->send.buf + off - 10, tmp, n);  // Set content length
   } else {
-    mg_http_reply(c, 400, "Cannot open dir");
+    mg_http_reply(c, 400, "", "Cannot open dir");
-    LOG(LL_DEBUG, ("%p opendir(%s) -> %d", c->fd, dir, errno));
+    LOG(LL_ERROR, ("%lu opendir(%s) -> %d", c->id, dir, errno));
   }
 }
 #endif
 
 void mg_http_serve_dir(struct mg_connection *c, struct mg_http_message *hm,
-                       const char *dir) {
+                       struct mg_http_serve_opts *opts) {
-  char path[PATH_MAX + 2], root[sizeof(path) - 2], real[sizeof(path) - 2];
+  char t1[MG_PATH_MAX], t2[sizeof(t1)];
-  path[0] = root[0] = real[0] = '\0';
+  t1[0] = t2[0] = '\0';
-  if (realpath(dir, root) == NULL)
+
-    LOG(LL_DEBUG, ("realpath(%s): %d", dir, errno));
+  if (realpath(opts->root_dir, t1) == NULL) {
-  if (!mg_is_dir(root)) {
+    LOG(LL_ERROR, ("realpath(%s): %d", opts->root_dir, errno));
-    mg_http_reply(c, 400, "Bad web root [%s]\n", root);
+    mg_http_reply(c, 400, "", "Bad web root [%s]\n", opts->root_dir);
+  } else if (!mg_is_dir(t1)) {
+    mg_http_reply(c, 400, "", "Invalid web root [%s]\n", t1);
   } else {
     // NOTE(lsm): Xilinx snprintf does not 0-terminate the detination for
     // the %.*s specifier, if the length is zero. Make sure hm->uri.len > 0
     bool is_index = false;
-    size_t n = snprintf(path, sizeof(path), "%s%.*s", root, (int) hm->uri.len,
+    size_t n1 = strlen(t1), n2;
-                        hm->uri.ptr);
+
-    while (n > 0 && n < sizeof(path) && path[n - 1] == MG_DIRSEP) path[--n] = 0;
+    mg_url_decode(hm->uri.ptr, hm->uri.len, t1 + n1, sizeof(t1) - n1, 0);
-    if (realpath(path, real) == NULL)
+    t1[sizeof(t1) - 1] = '\0';
-      LOG(LL_DEBUG, ("realpath(%s): %d", dir, errno));
+    n2 = strlen(t1);
-    // LOG(LL_INFO, ("PATH: [%s] REAL: [%s]", path, real));
+    while (n2 > 0 && t1[n2 - 1] == '/') t1[--n2] = 0;
-    if (mg_is_dir(real)) {
+
-      strncat(real, "/index.html", sizeof(real) - strlen(real) - 1);
+    if (realpath(t1, t2) == NULL) {
+      LOG(LL_ERROR, ("realpath(%s): %d", t1, errno));
+      mg_http_reply(c, 404, "", "Not found [%.*s]\n", (int) hm->uri.len,
+                    hm->uri.ptr);
+      return;
+    }
+
+    if (mg_is_dir(t2)) {
+      strncat(t2, "/index.html", sizeof(t2) - strlen(t2) - 1);
+      t2[sizeof(t2) - 1] = '\0';
       is_index = true;
     }
-    if (strlen(real) < strlen(root) || memcmp(real, root, strlen(root)) != 0) {
+
-      mg_http_reply(c, 404, "Not found %.*s\n", hm->uri.len, hm->uri.ptr);
+    if (strlen(t2) < n1 || memcmp(t1, t2, n1) != 0) {
+      // Requested file is located outside root directory, fail
+      mg_http_reply(c, 404, "", "Invalid URI [%.*s]\n", (int) hm->uri.len,
+                    hm->uri.ptr);
     } else {
-        FILE *fp = fopen(real, "r");
+      FILE *fp = mg_fopen(t2, "r");
-#if MG_ENABLE_HTTP_DEBUG_ENDPOINT
+#if MG_ENABLE_SSI
-      snprintf(c->label, sizeof(c->label) - 1, "<-F %s", real);
+      if (is_index && fp == NULL) {
+        char *p = t2 + strlen(t2);
+        while (p > t2 && p[-1] != '/') p--;
+        strncpy(p, "index.shtml", &t2[sizeof(t2)] - p - 2);
+        t2[sizeof(t2) - 1] = '\0';
+        fp = mg_fopen(t2, "r");
+      }
 #endif
       if (is_index && fp == NULL) {
 #if MG_ENABLE_DIRECTORY_LISTING
-        listdir(c, hm, real);
+        listdir(c, hm, t2);
 #else
-        mg_http_reply(c, 403, "%s", "Directory listing not supported");
+        mg_http_reply(c, 403, "", "%s", "Directory listing not supported");
+#endif
+#if MG_ENABLE_SSI
+      } else if (opts->ssi_pattern != NULL &&
+                 mg_globmatch(opts->ssi_pattern, strlen(opts->ssi_pattern), t2,
+                              strlen(t2))) {
+        t1[n1] = '\0';
+        mg_http_serve_ssi(c, t1, t2);
 #endif
       } else {
-        mg_http_serve_file(c, hm, real, guess_content_type(real));
+        mg_http_serve_file(c, hm, t2, guess_content_type(t2), NULL);
       }
       if (fp != NULL) fclose(fp);
     }
@@ -579,6 +700,27 @@ void mg_http_serve_dir(struct mg_connection *c, struct mg_http_message *hm,
 }
 #endif
 
+static bool mg_is_url_safe(int c) {
+  return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') ||
+         (c >= 'A' && c <= 'Z') || c == '.' || c == '_' || c == '-' || c == '~';
+}
+
+int mg_url_encode(const char *s, size_t sl, char *buf, size_t len) {
+  size_t i, n = 0;
+  for (i = 0; i < sl; i++) {
+    int c = *(unsigned char *) &s[i];
+    if (n + 4 >= len) return 0;
+    if (mg_is_url_safe(c)) {
+      buf[n++] = s[i];
+    } else {
+      buf[n++] = '%';
+      mg_hex(&s[i], 1, &buf[n]);
+      n += 2;
+    }
+  }
+  return n;
+}
+
 void mg_http_creds(struct mg_http_message *hm, char *user, int userlen,
                    char *pass, int passlen) {
   struct mg_str *v = mg_http_get_header(hm, "Authorization");
@@ -612,73 +754,121 @@ bool mg_http_match_uri(const struct mg_http_message *hm, const char *glob) {
   return mg_globmatch(glob, strlen(glob), hm->uri.ptr, hm->uri.len);
 }
 
-static void http_cb(struct mg_connection *c, int ev, void *ev_data,
+static size_t get_chunk_length(const char *buf, size_t len, size_t *ll) {
-                    void *fn_data) {
+  size_t i = 0, n;
+  while (i < len && buf[i] != '\r' && i != '\n') i++;
+  n = mg_unhexn((char *) buf, i);
+  while (i < len && (buf[i] == '\r' || i == '\n')) i++;
+  // LOG(LL_INFO, ("len %zu i %zu n %zu ", len, i, n));
+  if (ll != NULL) *ll = i + 1;
+  if (i < len && i + n + 2 < len) return i + n + 3;
+  return 0;
+}
+
+// Walk through all chunks in the chunked body. For each chunk, fire
+// an MG_EV_HTTP_CHUNK event.
+static void walkchunks(struct mg_connection *c, struct mg_http_message *hm,
+                       int reqlen) {
+  size_t off = 0, bl, ll;
+  while (off + reqlen < c->recv.len) {
+    char *buf = (char *) &c->recv.buf[reqlen];
+    size_t memo = c->recv.len;
+    size_t cl = get_chunk_length(&buf[off], memo - reqlen - off, &ll);
+    // LOG(LL_INFO, ("len %zu off %zu cl %zu ll %zu", len, off, cl, ll));
+    if (cl == 0) break;
+    hm->chunk = mg_str_n(&buf[off + ll], cl < ll + 2 ? 0 : cl - ll - 2);
+    mg_call(c, MG_EV_HTTP_CHUNK, hm);
+    // Increase offset only if user has not deleted this chunk
+    if (memo == c->recv.len) off += cl;
+    if (cl <= 5) {
+      // Zero chunk - last one. Prepare body - cut off chunk lengths
+      off = bl = 0;
+      while (off + reqlen < c->recv.len) {
+        char *buf = (char *) &c->recv.buf[reqlen];
+        size_t memo = c->recv.len;
+        size_t cl = get_chunk_length(&buf[off], memo - reqlen - off, &ll);
+        size_t n = cl < ll + 2 ? 0 : cl - ll - 2;
+        if (cl <= 5) break;
+        memmove(buf + bl, buf + off + ll, n);
+        bl += n;
+        off += cl;
+      }
+      // Set message length to indicate we've received
+      // everything, to fire MG_EV_HTTP_MSG
+      hm->message.len = bl + reqlen;
+      hm->body.len = bl;
+      break;
+    }
+  }
+}
+
+static bool mg_is_chunked(struct mg_http_message *hm) {
+  struct mg_str needle = mg_str_n("chunked", 7);
+  struct mg_str *te = mg_http_get_header(hm, "Transfer-Encoding");
+  return te != NULL && mg_strstr(*te, needle) != NULL;
+}
+
+void mg_http_delete_chunk(struct mg_connection *c, struct mg_http_message *hm) {
+  struct mg_str ch = hm->chunk;
+  if (mg_is_chunked(hm)) {
+    ch.len += 4;  // \r\n before and after the chunk
+    ch.ptr -= 2;
+    while (ch.ptr > hm->body.ptr && *ch.ptr != '\n') ch.ptr--, ch.len++;
+  }
+  {
+    const char *end = &ch.ptr[ch.len];
+    size_t n = end - (char *) c->recv.buf;
+    if (c->recv.len > n) memmove((char *) ch.ptr, end, c->recv.len - n);
+    // LOG(LL_INFO, ("DELETING CHUNK: %zu %zu %zu\n%.*s", c->recv.len, n,
+    // ch.len, (int) ch.len, ch.ptr));
+  }
+  c->recv.len -= ch.len;
+}
+
+static void http_cb(struct mg_connection *c, int ev, void *evd, void *fnd) {
   if (ev == MG_EV_READ || ev == MG_EV_CLOSE) {
     struct mg_http_message hm;
     for (;;) {
       int n = mg_http_parse((char *) c->recv.buf, c->recv.len, &hm);
+      bool is_chunked = n > 0 && mg_is_chunked(&hm);
       if (ev == MG_EV_CLOSE) {
         hm.message.len = c->recv.len;
         hm.body.len = hm.message.len - (hm.body.ptr - hm.message.ptr);
+      } else if (is_chunked) {
+        walkchunks(c, &hm, n);
       }
+      // LOG(LL_INFO,
+      //("---->%d %d\n%.*s", n, is_chunked, (int) c->recv.len, c->recv.buf));
       if (n < 0 && ev == MG_EV_READ) {
-        LOG(LL_ERROR, ("%p HTTP parse error", c->fd));
+        LOG(LL_ERROR, ("%lu HTTP parse error", c->id));
         c->is_closing = 1;
         break;
       } else if (n > 0 && (size_t) c->recv.len >= hm.message.len) {
-#if MG_ENABLE_HTTP_DEBUG_ENDPOINT
-        snprintf(c->label, sizeof(c->label) - 1, "<-[%.*s]", (int) hm.uri.len,
-                 hm.uri.ptr);
-        if (mg_http_match_uri(&hm, "/debug/info")) {
-          struct mg_mgr *mgr = (struct mg_mgr *) fn_data;
-          struct mg_connection *x;
-          mg_printf(c, "%s\r\n",
-                    "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n");
-          for (x = mgr->conns; x != NULL; x = x->next) {
-            // LOG(LL_INFO, ("%p %s", x->fd, x->label));
-            mg_http_printf_chunk(
-                c,
-                "%-4p %-12s %04d.%04d/%04d.%04d"
-                " %d%d%d%d%d%d%d%d%d%d%d%d%d%d\n",
-                x->fd, x->label, x->recv.len, x->recv.size, x->send.len,
-                x->send.size, c->is_listening, c->is_client, c->is_accepted,
-                c->is_resolving, c->is_connecting, c->is_tls, c->is_tls_hs,
-                c->is_udp, c->is_websocket, c->is_hexdumping, c->is_draining,
-                c->is_closing, c->is_readable, c->is_writable);
-          }
-          mg_http_write_chunk(c, "", 0);
-          mg_iobuf_delete(&c->recv, hm.message.len);
-          continue;
-        }
-#endif
         mg_call(c, MG_EV_HTTP_MSG, &hm);
         mg_iobuf_delete(&c->recv, hm.message.len);
       } else {
+        if (n > 0 && !is_chunked) {
+          hm.chunk = mg_str_n((char *) &c->recv.buf[n], c->recv.len - n);
+          mg_call(c, MG_EV_HTTP_CHUNK, &hm);
+        }
         break;
       }
     }
   }
-  (void) fn_data;
+  (void) fnd;
-  (void) ev_data;
+  (void) evd;
 }
 
 struct mg_connection *mg_http_connect(struct mg_mgr *mgr, const char *url,
                                       mg_event_handler_t fn, void *fn_data) {
   struct mg_connection *c = mg_connect(mgr, url, fn, fn_data);
-  if (c != NULL) c->pfn = http_cb, c->pfn_data = mgr;
+  if (c != NULL) c->pfn = http_cb;
-#if MG_ENABLE_HTTP_DEBUG_ENDPOINT
-  snprintf(c->label, sizeof(c->label) - 1, "->%s", url);
-#endif
   return c;
 }
 
 struct mg_connection *mg_http_listen(struct mg_mgr *mgr, const char *url,
                                      mg_event_handler_t fn, void *fn_data) {
   struct mg_connection *c = mg_listen(mgr, url, fn, fn_data);
-  if (c != NULL) c->pfn = http_cb, c->pfn_data = mgr;
+  if (c != NULL) c->pfn = http_cb;
-#if MG_ENABLE_HTTP_DEBUG_ENDPOINT
-  snprintf(c->label, sizeof(c->label) - 1, "<-LSN");
-#endif
   return c;
 }

src/http.h

@@ -13,30 +13,40 @@ struct mg_http_message {
   //        GET /foo/bar/baz?aa=b&cc=ddd HTTP/1.1
   // method |-| |----uri---| |--query--| |proto-|
 
-  struct mg_str method, uri, query, proto;  // Request/response line
+  struct mg_str method, uri, query, proto;             // Request/response line
   struct mg_http_header headers[MG_MAX_HTTP_HEADERS];  // Headers
-  struct mg_str body;                       // Body
+  struct mg_str body;                                  // Body
-  struct mg_str message;                    // Request line + headers + body
+  struct mg_str head;                                  // Request + headers
+  struct mg_str chunk;    // Chunk for chunked encoding,  or partial body
+  struct mg_str message;  // Request + headers + body
+};
+
+// Parameter for mg_http_serve_dir()
+struct mg_http_serve_opts {
+  const char *root_dir;     // Web root directory, must be non-NULL
+  const char *ssi_pattern;  // SSI filename pattern, e.g. #.shtml
 };
 
 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_write_head(struct mg_connection *, int code, const char *fmt, ...);
 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,
                                       mg_event_handler_t fn, void *fn_data);
 void mg_http_serve_dir(struct mg_connection *, struct mg_http_message *hm,
-                       const char *path);
+                       struct mg_http_serve_opts *);
 void mg_http_serve_file(struct mg_connection *, struct mg_http_message *,
-                        const char *, const char *mime);
+                        const char *, const char *mime, const char *headers);
-void mg_http_reply(struct mg_connection *c, int code, const char *fmt, ...);
+void mg_http_reply(struct mg_connection *, int status_code, const char *headers,
+                   const char *body_fmt, ...);
 struct mg_str *mg_http_get_header(struct mg_http_message *, const char *name);
 void mg_http_event_handler(struct mg_connection *c, int ev);
 int mg_http_get_var(const struct mg_str *, const char *name, char *, int);
 int mg_url_decode(const char *s, size_t n, char *to, size_t to_len, int form);
+int mg_url_encode(const char *s, size_t n, char *buf, size_t len);
 void mg_http_creds(struct mg_http_message *, char *user, int, char *pass, int);
 bool mg_http_match_uri(const struct mg_http_message *, const char *glob);
 int mg_http_upload(struct mg_connection *, struct mg_http_message *hm,

src/iobuf.c

@@ -3,7 +3,8 @@
 
 #include <string.h>
 
-void mg_iobuf_resize(struct mg_iobuf *io, size_t new_size) {
+int mg_iobuf_resize(struct mg_iobuf *io, size_t new_size) {
+  int ok = 1;
   if (new_size == 0) {
     free(io->buf);
     io->buf = NULL;
@@ -18,16 +19,16 @@ void mg_iobuf_resize(struct mg_iobuf *io, size_t new_size) {
       io->buf = (unsigned char *) p;
       io->size = new_size;
     } else {
+      ok = 0;
       LOG(LL_ERROR,
           ("%lu->%lu", (unsigned long) io->size, (unsigned long) new_size));
     }
   }
+  return ok;
 }
 
-void mg_iobuf_init(struct mg_iobuf *io, size_t size) {
+int mg_iobuf_init(struct mg_iobuf *io, size_t size) {
-  io->buf = NULL;
+  return mg_iobuf_resize(io, size);
-  io->len = io->size = 0;
-  if (size > 0) mg_iobuf_resize(io, size);
 }
 
 size_t mg_iobuf_append(struct mg_iobuf *io, const void *buf, size_t len,
@@ -49,6 +50,5 @@ size_t mg_iobuf_delete(struct mg_iobuf *io, size_t len) {
 }
 
 void mg_iobuf_free(struct mg_iobuf *io) {
-  free(io->buf);
+  mg_iobuf_resize(io, 0);
-  mg_iobuf_init(io, 0);
 }

src/iobuf.h

@@ -7,8 +7,8 @@ struct mg_iobuf {
   size_t size, len;
 };
 
-void mg_iobuf_init(struct mg_iobuf *, size_t);
+int mg_iobuf_init(struct mg_iobuf *, size_t);
-void mg_iobuf_resize(struct mg_iobuf *, size_t);
+int mg_iobuf_resize(struct mg_iobuf *, size_t);
 void mg_iobuf_free(struct mg_iobuf *);
 size_t mg_iobuf_append(struct mg_iobuf *, const void *, size_t, size_t);
 size_t mg_iobuf_delete(struct mg_iobuf *, size_t);

src/license.h

@@ -1,5 +1,5 @@
 // Copyright (c) 2004-2013 Sergey Lyubka
-// Copyright (c) 2013-2020 Cesanta Software Limited
+// Copyright (c) 2013-2021 Cesanta Software Limited
 // All rights reserved
 //
 // This software is dual-licensed: you can redistribute it and/or modify
@@ -14,4 +14,3 @@
 //
 // Alternatively, you can license this software under a commercial
 // license, as set out in <https://www.cesanta.com/license>.
-

src/log.c

@@ -14,7 +14,7 @@ static void (*s_fn)(const void *, int, void *) = mg_log_stdout;
 static void *s_fn_param = NULL;
 
 void mg_log_set(const char *spec) {
-  LOG(LL_INFO, ("Setting log level to %s", spec));
+  LOG(LL_DEBUG, ("Setting log level to %s", spec));
   s_spec = spec;
 }
 

src/lwip.c

@@ -87,7 +87,7 @@ int mg_send(struct mg_connection *c, const void *buf, size_t len) {
       err_t err = udp_send(pcb, p);
       pbuf_free(p);
       LOG(LL_DEBUG,
-          ("%p UDP %d bytes -> %x:%hu, err %ld", c->fd, (int) len,
+          ("%lu UDP %d bytes -> %x:%hu, err %ld", c->id, (int) len,
            (unsigned) *(uint32_t *) &pcb->remote_ip, pcb->remote_port, err));
       if (err != ERR_OK) mg_error(c, "%p err %d", c->fd, err);
     } else {
@@ -146,7 +146,7 @@ struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *url,
     tcp_bind(c->fd, IP_ADDR_ANY, 0);
     tcp_nagle_disable((struct tcp_pcb *) c->fd);
   }
-  LOG(LL_DEBUG, ("%p -> %s %s", c->fd, url, c->is_udp ? "UDP" : "TCP"));
+  LOG(LL_DEBUG, ("%lu -> %s %s", c->id, url, c->is_udp ? "UDP" : "TCP"));
   mg_resolve(mgr, c, &host, mgr->dnstimeout);
   return c;
 }
@@ -156,7 +156,7 @@ void mg_connect_resolved(struct mg_connection *c) {
   ip_addr_t ipaddr;
   memcpy(&ipaddr, &c->peer.ip, sizeof(ipaddr));
   mg_call(c, MG_EV_RESOLVE, NULL);
-  LOG(LL_DEBUG, ("%p resolved to %s", c->fd, mg_straddr(c, buf, sizeof(buf))));
+  LOG(LL_DEBUG, ("%lu resolved to %s", c->id, mg_straddr(c, buf, sizeof(buf))));
   err_t err = c->is_udp ? udp_connect((struct udp_pcb *) c->fd, &ipaddr,
                                       mg_ntohs(c->peer.port))
                         : tcp_connect((struct tcp_pcb *) c->fd, &ipaddr,
@@ -194,8 +194,4 @@ void mg_mgr_poll(struct mg_mgr *mgr, int ms) {
   mg_usleep(200 * 1000);
   mg_timer_poll(mg_millis());
 }
-
-void mg_mgr_init(struct mg_mgr *mgr) {
-  (void) mgr;
-}
 #endif

src/md5.c

@@ -1,5 +1,5 @@
-#include "md5.h"
 #include <string.h>
+#include "md5.h"
 
 #if MG_ENABLE_MD5
 #if !defined(BYTE_ORDER) && defined(__BYTE_ORDER)
@@ -50,7 +50,7 @@ void mg_md5_init(mg_md5_ctx *ctx) {
 }
 
 static void mg_md5_transform(uint32_t buf[4], uint32_t const in[16]) {
-  register uint32_t a, b, c, d;
+  uint32_t a, b, c, d;
 
   a = buf[0];
   b = buf[1];

src/mqtt.c

@@ -1,27 +1,12 @@
-#include "mqtt.h"
 #include "arch.h"
 #include "base64.h"
 #include "event.h"
 #include "log.h"
+#include "mqtt.h"
 #include "private.h"
 #include "url.h"
 #include "util.h"
 
-#define MQTT_CMD_CONNECT 1
-#define MQTT_CMD_CONNACK 2
-#define MQTT_CMD_PUBLISH 3
-#define MQTT_CMD_PUBACK 4
-#define MQTT_CMD_PUBREC 5
-#define MQTT_CMD_PUBREL 6
-#define MQTT_CMD_PUBCOMP 7
-#define MQTT_CMD_SUBSCRIBE 8
-#define MQTT_CMD_SUBACK 9
-#define MQTT_CMD_UNSUBSCRIBE 10
-#define MQTT_CMD_UNSUBACK 11
-#define MQTT_CMD_PINGREQ 12
-#define MQTT_CMD_PINGRESP 13
-#define MQTT_CMD_DISCONNECT 14
-
 #define MQTT_CLEAN_SESSION 0x02
 #define MQTT_HAS_WILL 0x04
 #define MQTT_WILL_RETAIN 0x20
@@ -29,20 +14,11 @@
 #define MQTT_HAS_USER_NAME 0x80
 #define MQTT_GET_WILL_QOS(flags) (((flags) &0x18) >> 3)
 #define MQTT_SET_WILL_QOS(flags, qos) (flags) = ((flags) & ~0x18) | ((qos) << 3)
-#define MQTT_QOS(qos) ((qos) << 1)
-#define MQTT_GET_QOS(flags) (((flags) &0x6) >> 1)
-#define MQTT_SET_QOS(flags, qos) (flags) = ((flags) & ~0x6) | ((qos) << 1)
 
 enum { MQTT_OK, MQTT_INCOMPLETE, MQTT_MALFORMED };
 
-struct mqtt_message {
+void mg_mqtt_send_header(struct mg_connection *c, uint8_t cmd, uint8_t flags,
-  size_t len, topic_offset, topic_len, data_offset, data_len;
+                         uint32_t len) {
-  uint16_t id;
-  uint8_t cmd, qos, connack_ret_code;
-};
-
-static void mqtt_send_header(struct mg_connection *c, uint8_t cmd,
-                             uint8_t flags, uint32_t len) {
   uint8_t buf[1 + sizeof(len)], *vlen = &buf[1];
   buf[0] = (cmd << 4) | flags;
   do {
@@ -82,7 +58,7 @@ static void mqtt_login(struct mg_connection *c, const char *url,
   if (opts->will_retain) flags |= MQTT_WILL_RETAIN;
   total_len += (uint32_t) opts->client_id.len;
 
-  mqtt_send_header(c, MQTT_CMD_CONNECT, 0, total_len);
+  mg_mqtt_send_header(c, MQTT_CMD_CONNECT, 0, total_len);
   mg_send(c, "\00\04MQTT\04", 7);
   mg_send(c, &flags, 1);
   // keepalive == 0 means "do not disconnect us!"
@@ -109,10 +85,10 @@ void mg_mqtt_pub(struct mg_connection *c, struct mg_str *topic,
                  struct mg_str *data) {
   uint8_t flags = MQTT_QOS(1);
   uint32_t total_len = 2 + (uint32_t) topic->len + (uint32_t) data->len;
-  LOG(LL_DEBUG, ("%p [%.*s] -> [%.*s]", c->fd, (int) topic->len,
+  LOG(LL_DEBUG, ("%lu [%.*s] -> [%.*s]", c->id, (int) topic->len,
                  (char *) topic->ptr, (int) data->len, (char *) data->ptr));
   if (MQTT_GET_QOS(flags) > 0) total_len += 2;
-  mqtt_send_header(c, MQTT_CMD_PUBLISH, flags, total_len);
+  mg_mqtt_send_header(c, MQTT_CMD_PUBLISH, flags, total_len);
   mg_send_u16(c, mg_htons((uint16_t) topic->len));
   mg_send(c, topic->ptr, topic->len);
   if (MQTT_GET_QOS(flags) > 0) {
@@ -127,7 +103,8 @@ void mg_mqtt_sub(struct mg_connection *c, struct mg_str *topic) {
   static uint16_t s_id;
   uint8_t qos = 1;
   uint32_t total_len = 2 + (uint32_t) topic->len + 2 + 1;
-  mqtt_send_header(c, MQTT_CMD_SUBSCRIBE, (uint8_t) MQTT_QOS(qos), total_len);
+  mg_mqtt_send_header(c, MQTT_CMD_SUBSCRIBE, (uint8_t) MQTT_QOS(qos),
+                      total_len);
   if (++s_id == 0) ++s_id;
   mg_send_u16(c, mg_htons(s_id));
   mg_send_u16(c, mg_htons((uint16_t) topic->len));
@@ -135,32 +112,33 @@ void mg_mqtt_sub(struct mg_connection *c, struct mg_str *topic) {
   mg_send(c, &qos, sizeof(qos));
 }
 
-static int parse(const uint8_t *in, size_t inlen, struct mqtt_message *m) {
+int mg_mqtt_parse(const uint8_t *buf, size_t len, struct mg_mqtt_message *m) {
   uint8_t lc = 0, *p, *end;
-  uint32_t len = 0, len_len = 0;
+  uint32_t n = 0, len_len = 0;
 
-  if (inlen < 2) return MQTT_INCOMPLETE;
+  memset(m, 0, sizeof(*m));
-  m->cmd = in[0] >> 4;
+  m->dgram.ptr = (char *) buf;
-  m->qos = (in[0] >> 1) & 3;
+  if (len < 2) return MQTT_INCOMPLETE;
+  m->cmd = buf[0] >> 4;
+  m->qos = (buf[0] >> 1) & 3;
 
-  len = len_len = 0;
+  n = len_len = 0;
-  p = (uint8_t *) in + 1;
+  p = (uint8_t *) buf + 1;
-  while ((size_t)(p - in) < inlen) {
+  while ((size_t)(p - buf) < len) {
     lc = *((uint8_t *) p++);
-    len += (lc & 0x7f) << 7 * len_len;
+    n += (lc & 0x7f) << 7 * len_len;
     len_len++;
     if (!(lc & 0x80)) break;
     if (len_len >= 4) return MQTT_MALFORMED;
   }
-
+  end = p + n;
-  end = p + len;
+  if (lc & 0x80 || end > buf + len) return MQTT_INCOMPLETE;
-  if (lc & 0x80 || end > in + inlen) return MQTT_INCOMPLETE;
+  m->dgram.len = end - buf;
-  m->len = (int) (end - in);
 
   switch (m->cmd) {
     case MQTT_CMD_CONNACK:
       if (end - p < 2) return MQTT_MALFORMED;
-      m->connack_ret_code = p[1];
+      m->ack = p[1];
       break;
     case MQTT_CMD_PUBACK:
     case MQTT_CMD_PUBREC:
@@ -170,11 +148,17 @@ static int parse(const uint8_t *in, size_t inlen, struct mqtt_message *m) {
       if (p + 2 > end) return MQTT_MALFORMED;
       m->id = (p[0] << 8) | p[1];
       break;
+    case MQTT_CMD_SUBSCRIBE: {
+      if (p + 2 > end) return MQTT_MALFORMED;
+      m->id = (p[0] << 8) | p[1];
+      p += 2;
+      break;
+    }
     case MQTT_CMD_PUBLISH: {
       if (p + 2 > end) return MQTT_MALFORMED;
-      m->topic_len = (p[0] << 8) | p[1];
+      m->topic.len = (p[0] << 8) | p[1];
-      m->topic_offset = p + 2 - in;
+      m->topic.ptr = (char *) p + 2;
-      p += 2 + m->topic_len;
+      p += 2 + m->topic.len;
       if (p > end) return MQTT_MALFORMED;
       if (m->qos > 0) {
         if (p + 2 > end) return MQTT_MALFORMED;
@@ -182,8 +166,9 @@ static int parse(const uint8_t *in, size_t inlen, struct mqtt_message *m) {
         p += 2;
       }
       if (p > end) return MQTT_MALFORMED;
-      m->data_offset = p - in;
+      m->data.ptr = (char *) p;
-      m->data_len = end - p;
+      m->data.len = end - p;
+      break;
     }
     default:
       break;
@@ -191,55 +176,64 @@ static int parse(const uint8_t *in, size_t inlen, struct mqtt_message *m) {
   return MQTT_OK;
 }
 
-int mg_mqtt_parse(const unsigned char *s, int n, struct mg_mqtt_message *mm) {
+static int mg_mqtt_next_topic(struct mg_mqtt_message *msg, struct mg_str *topic,
-  struct mqtt_message m;
+                              uint8_t *qos, int pos) {
-  int rc = parse(s, n, &m);
+  unsigned char *buf = (unsigned char *) msg->dgram.ptr + pos;
-  if (rc == MQTT_OK) {
+  int new_pos;
-    mm->topic.ptr = (char *) s + m.topic_offset;
+  if ((size_t) pos >= msg->dgram.len) return -1;
-    mm->topic.len = m.topic_len;
+
-    mm->data.ptr = (char *) s + m.data_offset;
+  topic->len = buf[0] << 8 | buf[1];
-    mm->data.len = m.data_len;
+  topic->ptr = (char *) buf + 2;
-  }
+  new_pos = pos + 2 + topic->len + (qos == NULL ? 0 : 1);
-  return rc;
+  if ((size_t) new_pos > msg->dgram.len) return -1;
+  if (qos != NULL) *qos = buf[2 + topic->len];
+  return new_pos;
+}
+
+int mg_mqtt_next_sub(struct mg_mqtt_message *msg, struct mg_str *topic,
+                     uint8_t *qos, int pos) {
+  uint8_t tmp;
+  return mg_mqtt_next_topic(msg, topic, qos == NULL ? &tmp : qos, pos);
+}
+
+int mg_mqtt_next_unsub(struct mg_mqtt_message *msg, struct mg_str *topic,
+                       int pos) {
+  return mg_mqtt_next_topic(msg, topic, NULL, pos);
 }
 
 static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data,
                     void *fn_data) {
   if (ev == MG_EV_READ) {
-    struct mqtt_message m;
-    memset(&m, 0, sizeof(m));
     for (;;) {
-      int rc = parse(c->recv.buf, c->recv.len, &m);
+      struct mg_mqtt_message mm;
+      int rc = mg_mqtt_parse(c->recv.buf, c->recv.len, &mm);
       if (rc == MQTT_MALFORMED) {
-        LOG(LL_ERROR, ("%p MQTT malformed message", c->fd));
+        LOG(LL_ERROR, ("%lu MQTT malformed message", c->id));
         c->is_closing = 1;
         break;
       } else if (rc == MQTT_OK) {
         LOG(LL_VERBOSE_DEBUG,
-            ("%p MQTT CMD %d len %d [%.*s]", c->fd, m.cmd, (int) m.len,
+            ("%p MQTT CMD %d len %d [%.*s]", c->fd, mm.cmd, (int) mm.dgram.len,
-             (int) m.data_len, (char *) c->recv.buf + m.data_offset));
+             (int) mm.data.len, mm.data.ptr));
-        switch (m.cmd) {
+        switch (mm.cmd) {
           case MQTT_CMD_CONNACK:
-            mg_call(c, MG_EV_MQTT_OPEN, &m.connack_ret_code);
+            mg_call(c, MG_EV_MQTT_OPEN, &mm.ack);
-            if (m.connack_ret_code == 0) {
+            if (mm.ack == 0) {
-              LOG(LL_INFO, ("%p Connected", c->fd));
+              LOG(LL_INFO, ("%lu Connected", c->id));
             } else {
-              LOG(LL_ERROR,
+              LOG(LL_ERROR, ("%lu MQTT auth failed, code %d", c->id, mm.ack));
-                  ("%p MQTT auth failed, code %d", c->fd, m.connack_ret_code));
               c->is_closing = 1;
             }
             break;
           case MQTT_CMD_PUBLISH: {
-            struct mg_mqtt_message evd = {
+            LOG(LL_DEBUG, ("%lu [%.*s] -> [%.*s]", c->id, (int) mm.topic.len,
-                {(char *) c->recv.buf + m.topic_offset, m.topic_len},
+                           mm.topic.ptr, (int) mm.data.len, mm.data.ptr));
-                {(char *) c->recv.buf + m.data_offset, m.data_len}};
+            mg_call(c, MG_EV_MQTT_MSG, &mm);
-            LOG(LL_DEBUG, ("%p [%.*s] -> [%.*s]", c->fd, (int) evd.topic.len,
-                           evd.topic.ptr, (int) evd.data.len, evd.data.ptr));
-            mg_call(c, MG_EV_MQTT_MSG, &evd);
             break;
           }
         }
-        mg_iobuf_delete(&c->recv, m.len);
+        mg_call(c, MG_EV_MQTT_CMD, &mm);
+        mg_iobuf_delete(&c->recv, mm.dgram.len);
       } else {
         break;
       }
@@ -249,6 +243,18 @@ static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data,
   (void) fn_data;
 }
 
+void mg_mqtt_ping(struct mg_connection *nc) {
+  mg_mqtt_send_header(nc, MQTT_CMD_PINGREQ, 0, 0);
+}
+
+void mg_mqtt_pong(struct mg_connection *nc) {
+  mg_mqtt_send_header(nc, MQTT_CMD_PINGRESP, 0, 0);
+}
+
+void mg_mqtt_disconnect(struct mg_connection *nc) {
+  mg_mqtt_send_header(nc, MQTT_CMD_DISCONNECT, 0, 0);
+}
+
 struct mg_connection *mg_mqtt_connect(struct mg_mgr *mgr, const char *url,
                                       struct mg_mqtt_opts *opts,
                                       mg_event_handler_t fn, void *fn_data) {
@@ -261,3 +267,10 @@ struct mg_connection *mg_mqtt_connect(struct mg_mgr *mgr, const char *url,
   }
   return c;
 }
+
+struct mg_connection *mg_mqtt_listen(struct mg_mgr *mgr, const char *url,
+                                     mg_event_handler_t fn, void *fn_data) {
+  struct mg_connection *c = mg_listen(mgr, url, fn, fn_data);
+  if (c != NULL) c->pfn = mqtt_cb, c->pfn_data = mgr;
+  return c;
+}

src/mqtt.h

@@ -3,6 +3,25 @@
 #include "net.h"
 #include "str.h"
 
+#define MQTT_CMD_CONNECT 1
+#define MQTT_CMD_CONNACK 2
+#define MQTT_CMD_PUBLISH 3
+#define MQTT_CMD_PUBACK 4
+#define MQTT_CMD_PUBREC 5
+#define MQTT_CMD_PUBREL 6
+#define MQTT_CMD_PUBCOMP 7
+#define MQTT_CMD_SUBSCRIBE 8
+#define MQTT_CMD_SUBACK 9
+#define MQTT_CMD_UNSUBSCRIBE 10
+#define MQTT_CMD_UNSUBACK 11
+#define MQTT_CMD_PINGREQ 12
+#define MQTT_CMD_PINGRESP 13
+#define MQTT_CMD_DISCONNECT 14
+
+#define MQTT_QOS(qos) ((qos) << 1)
+#define MQTT_GET_QOS(flags) (((flags) &0x6) >> 1)
+#define MQTT_SET_QOS(flags, qos) (flags) = ((flags) & ~0x6) | ((qos) << 1)
+
 struct mg_mqtt_opts {
   struct mg_str client_id;
   struct mg_str will_topic;
@@ -14,14 +33,30 @@ struct mg_mqtt_opts {
 };
 
 struct mg_mqtt_message {
-  struct mg_str topic;
+  struct mg_str topic;    // Parsed topic
-  struct mg_str data;
+  struct mg_str data;     // Parsed message
+  struct mg_str dgram;    // Whole MQTT datagram, including headers
+  uint16_t id;  // Set for PUBACK, PUBREC, PUBREL, PUBCOMP, SUBACK, PUBLISH
+  uint8_t cmd;  // MQTT command, one of MQTT_CMD_*
+  uint8_t qos;  // Quality of service
+  uint8_t ack;  // Connack return code. 0 - success
 };
 
 struct mg_connection *mg_mqtt_connect(struct mg_mgr *, const char *url,
                                       struct mg_mqtt_opts *opts,
                                       mg_event_handler_t fn, void *fn_data);
+struct mg_connection *mg_mqtt_listen(struct mg_mgr *mgr, const char *url,
+                                     mg_event_handler_t fn, void *fn_data);
 void mg_mqtt_pub(struct mg_connection *, struct mg_str *topic,
                  struct mg_str *data);
 void mg_mqtt_sub(struct mg_connection *, struct mg_str *topic);
-int mg_mqtt_parse(const unsigned char *buf, int len, struct mg_mqtt_message *m);
+int mg_mqtt_parse(const uint8_t *buf, size_t len, struct mg_mqtt_message *m);
+void mg_mqtt_send_header(struct mg_connection *, uint8_t cmd, uint8_t flags,
+                         uint32_t len);
+int mg_mqtt_next_sub(struct mg_mqtt_message *msg, struct mg_str *topic,
+                     uint8_t *qos, int pos);
+int mg_mqtt_next_unsub(struct mg_mqtt_message *msg, struct mg_str *topic,
+                       int pos);
+void mg_mqtt_ping(struct mg_connection *);
+void mg_mqtt_pong(struct mg_connection *);
+void mg_mqtt_disconnect(struct mg_connection *);

src/net.c

@@ -1,5 +1,5 @@
-#include "net.h"
 #include "log.h"
+#include "net.h"
 #include "util.h"
 
 int mg_vprintf(struct mg_connection *c, const char *fmt, va_list ap) {
@@ -20,8 +20,120 @@ int mg_printf(struct mg_connection *c, const char *fmt, ...) {
 }
 
 char *mg_straddr(struct mg_connection *c, char *buf, size_t len) {
-  unsigned char *p = (unsigned char *) &c->peer.ip;
+  char tmp[100];
-  snprintf(buf, len, "%d.%d.%d.%d:%hu", p[0], p[1], p[2], p[3],
+  const char *fmt = c->peer.is_ip6 ? "[%s]:%d" : "%s:%d";
-           mg_ntohs(c->peer.port));
+  mg_ntoa(&c->peer, tmp, sizeof(tmp));
+  snprintf(buf, len, fmt, tmp, (int) mg_ntohs(c->peer.port));
   return buf;
 }
+
+char *mg_ntoa(const struct mg_addr *addr, char *buf, size_t len) {
+  if (addr->is_ip6) {
+    uint16_t *p = (uint16_t *) addr->ip6;
+    snprintf(buf, len, "%x:%x:%x:%x:%x:%x:%x:%x", mg_htons(p[0]),
+             mg_htons(p[1]), mg_htons(p[2]), mg_htons(p[3]), mg_htons(p[4]),
+             mg_htons(p[5]), mg_htons(p[6]), mg_htons(p[7]));
+  } else {
+    uint8_t p[4];
+    memcpy(p, &addr->ip, sizeof(p));
+    snprintf(buf, len, "%d.%d.%d.%d", (int) p[0], (int) p[1], (int) p[2],
+             (int) p[3]);
+  }
+  return buf;
+}
+
+static bool mg_atonl(struct mg_str str, struct mg_addr *addr) {
+  if (mg_vcasecmp(&str, "localhost") != 0) return false;
+  addr->ip = mg_htonl(0x7f000001);
+  addr->is_ip6 = false;
+  return true;
+}
+
+static bool mg_aton4(struct mg_str str, struct mg_addr *addr) {
+  uint8_t data[4] = {0, 0, 0, 0};
+  size_t i, num_dots = 0;
+  for (i = 0; i < str.len; i++) {
+    if (str.ptr[i] >= '0' && str.ptr[i] <= '9') {
+      int octet = data[num_dots] * 10 + (str.ptr[i] - '0');
+      if (octet > 255) return false;
+      data[num_dots] = octet;
+    } else if (str.ptr[i] == '.') {
+      if (num_dots >= 3 || i == 0 || str.ptr[i - 1] == '.') return false;
+      num_dots++;
+    } else {
+      return false;
+    }
+  }
+  if (num_dots != 3 || str.ptr[i - 1] == '.') return false;
+  memcpy(&addr->ip, data, sizeof(data));
+  addr->is_ip6 = false;
+  return true;
+}
+
+static bool mg_aton6(struct mg_str str, struct mg_addr *addr) {
+  size_t i, j = 0, n = 0, dc = 42;
+  for (i = 0; i < str.len; i++) {
+    if ((str.ptr[i] >= '0' && str.ptr[i] <= '9') ||
+        (str.ptr[i] >= 'a' && str.ptr[i] <= 'f') ||
+        (str.ptr[i] >= 'A' && str.ptr[i] <= 'F')) {
+      unsigned long val;
+      if (i > j + 3) return false;
+      // LOG(LL_DEBUG, ("%zu %zu [%.*s]", i, j, (int) (i - j + 1),
+      // &str.ptr[j]));
+      val = mg_unhexn(&str.ptr[j], i - j + 1);
+      addr->ip6[n] = (uint8_t)((val >> 8) & 255);
+      addr->ip6[n + 1] = (uint8_t)(val & 255);
+    } else if (str.ptr[i] == ':') {
+      j = i + 1;
+      if (i > 0 && str.ptr[i - 1] == ':') {
+        dc = n;  // Double colon
+        if (i > 1 && str.ptr[i - 2] == ':') return false;
+      } else if (i > 0) {
+        n += 2;
+      }
+      if (n > 14) return false;
+      addr->ip6[n] = addr->ip6[n + 1] = 0;  // For trailing ::
+    } else {
+      return false;
+    }
+  }
+  if (n < 14 && dc == 42) return false;
+  if (n < 14) {
+    memmove(&addr->ip6[dc + (14 - n)], &addr->ip6[dc], n - dc + 2);
+    memset(&addr->ip6[dc], 0, 14 - n);
+  }
+  addr->is_ip6 = true;
+  return true;
+}
+
+bool mg_aton(struct mg_str str, struct mg_addr *addr) {
+  // LOG(LL_INFO, ("[%.*s]", (int) str.len, str.ptr));
+  return mg_atonl(str, addr) || mg_aton4(str, addr) || mg_aton6(str, addr);
+}
+
+void mg_mgr_free(struct mg_mgr *mgr) {
+  struct mg_connection *c;
+  for (c = mgr->conns; c != NULL; c = c->next) c->is_closing = 1;
+  mg_mgr_poll(mgr, 0);
+#if MG_ARCH == MG_ARCH_FREERTOS
+  FreeRTOS_DeleteSocketSet(mgr->ss);
+#endif
+  LOG(LL_INFO, ("All connections closed"));
+}
+
+void mg_mgr_init(struct mg_mgr *mgr) {
+#ifdef _WIN32
+  WSADATA data;
+  WSAStartup(MAKEWORD(2, 2), &data);
+#elif MG_ARCH == MG_ARCH_FREERTOS
+  mgr->ss = FreeRTOS_CreateSocketSet();
+#elif defined(__unix) || defined(__unix__) || defined(__APPLE__)
+  // Ignore SIGPIPE signal, so if client cancels the request, it
+  // won't kill the whole process.
+  signal(SIGPIPE, SIG_IGN);
+#endif
+  memset(mgr, 0, sizeof(*mgr));
+  mgr->dnstimeout = 3000;
+  mgr->dns4.url = "udp://8.8.8.8:53";
+  mgr->dns6.url = "udp://[2001:4860:4860::8888]:53";
+}

src/net.h

@@ -3,20 +3,30 @@
 #include "arch.h"
 #include "event.h"
 #include "iobuf.h"
+#include "str.h"
 
-struct mg_mgr {
+struct mg_dns {
-  struct mg_connection *conns;  // List of active connections
+  const char *url;          // DNS server URL
-  struct mg_connection *dnsc;   // DNS resolver connection
+  struct mg_connection *c;  // DNS server connection
-  const char *dnsserver;        // DNS server URL
-  int dnstimeout;               // DNS resolve timeout in milliseconds
-#if MG_ARCH == MG_ARCH_FREERTOS
-  SocketSet_t ss;  // NOTE(lsm): referenced from socket struct
-#endif
 };
 
 struct mg_addr {
-  uint16_t port;  // TCP or UDP port in network byte order
+  uint16_t port;    // TCP or UDP port in network byte order
-  uint32_t ip;    // IP address in network byte order
+  uint32_t ip;      // IP address in network byte order
+  uint8_t ip6[16];  // IPv6 address
+  bool is_ip6;      // True when address is IPv6 address
+};
+
+struct mg_mgr {
+  struct mg_connection *conns;  // List of active connections
+  struct mg_dns dns4;           // DNS for IPv4
+  struct mg_dns dns6;           // DNS for IPv6
+  int dnstimeout;               // DNS resolve timeout in milliseconds
+  unsigned long nextid;         // Next connection ID
+  void *userdata;               // Arbitrary user data pointer
+#if MG_ARCH == MG_ARCH_FREERTOS
+  SocketSet_t ss;  // NOTE(lsm): referenced from socket struct
+#endif
 };
 
 struct mg_connection {
@@ -24,13 +34,14 @@ struct mg_connection {
   struct mg_mgr *mgr;          // Our container
   struct mg_addr peer;         // Remote peer address
   void *fd;                    // Connected socket, or LWIP data
+  unsigned long id;            // Auto-incrementing unique connection ID
   struct mg_iobuf recv;        // Incoming data
   struct mg_iobuf send;        // Outgoing data
   mg_event_handler_t fn;       // User-specified event handler function
   void *fn_data;               // User-speficied function parameter
   mg_event_handler_t pfn;      // Protocol-specific handler function
   void *pfn_data;              // Protocol-specific function parameter
-  char label[32];              // Arbitrary label
+  char label[50];              // Arbitrary label
   void *tls;                   // TLS specific data
   unsigned is_listening : 1;   // Listening connection
   unsigned is_client : 1;      // Outbound (client) connection
@@ -61,3 +72,5 @@ int mg_printf(struct mg_connection *, const char *fmt, ...);
 int mg_vprintf(struct mg_connection *, const char *fmt, va_list ap);
 char *mg_straddr(struct mg_connection *, char *, size_t);
 bool mg_socketpair(int *s1, int *s2);
+bool mg_aton(struct mg_str str, struct mg_addr *addr);
+char *mg_ntoa(const struct mg_addr *addr, char *buf, size_t len);

src/sntp.c

@@ -1,7 +1,7 @@
-#include "sntp.h"
 #include "arch.h"
 #include "event.h"
 #include "log.h"
+#include "sntp.h"
 #include "util.h"
 
 #define SNTP_INTERVAL_SEC (3600)
@@ -49,7 +49,7 @@ static void sntp_cb(struct mg_connection *c, int ev, void *evd, void *fnd) {
 
 void mg_sntp_send(struct mg_connection *c, unsigned long utc) {
   if (c->is_resolving) {
-    LOG(LL_ERROR, ("%p wait until resolved", c->fd));
+    LOG(LL_ERROR, ("%lu wait until resolved", c->id));
   } else if (utc > s_sntmp_next) {
     uint8_t buf[48] = {0};
     s_sntmp_next = utc + SNTP_INTERVAL_SEC;

src/sock.c

@@ -13,6 +13,9 @@
 #if defined(_WIN32)
 #define MG_SOCK_ERRNO WSAGetLastError()
 #define FD(C_) ((SOCKET)(C_)->fd)
+#ifndef SO_EXCLUSIVEADDRUSE
+#define SO_EXCLUSIVEADDRUSE ((int) (~SO_REUSEADDR))
+#endif
 #elif MG_ARCH == MG_ARCH_FREERTOS
 #define MG_SOCK_ERRNO errno
 typedef Socket_t SOCKET;
@@ -26,6 +29,10 @@ typedef int SOCKET;
 #define FD(C_) ((SOCKET)(long) (C_)->fd)
 #endif
 
+#ifndef MSG_NONBLOCKING
+#define MSG_NONBLOCKING 0
+#endif
+
 union usa {
   struct sockaddr sa;
   struct sockaddr_in sin;
@@ -40,6 +47,13 @@ static union usa tousa(struct mg_addr *a) {
   usa.sin.sin_family = AF_INET;
   usa.sin.sin_port = a->port;
   *(uint32_t *) &usa.sin.sin_addr = a->ip;
+#if MG_ENABLE_IPV6
+  if (a->is_ip6) {
+    usa.sin.sin_family = AF_INET6;
+    usa.sin6.sin6_port = a->port;
+    memcpy(&usa.sin6.sin6_addr, a->ip6, sizeof(a->ip6));
+  }
+#endif
   return usa;
 }
 
@@ -62,6 +76,7 @@ static struct mg_connection *alloc_conn(struct mg_mgr *mgr, int is_client,
     c->is_client = is_client;
     c->fd = (void *) (long) fd;
     c->mgr = mgr;
+    c->id = ++mgr->nextid;
   }
   return c;
 }
@@ -72,13 +87,23 @@ static int mg_sock_recv(struct mg_connection *c, void *buf, int len,
   if (c->is_udp) {
     union usa usa;
     socklen_t slen = sizeof(usa.sin);
-    n = recvfrom(FD(c), buf, len, 0, &usa.sa, &slen);
+#if MG_ENABLE_IPV6
+    if (c->peer.is_ip6) slen = sizeof(usa.sin6);
+#endif
+    n = recvfrom(FD(c), (char *) buf, len, 0, &usa.sa, &slen);
     if (n > 0) {
-      c->peer.ip = *(uint32_t *) &usa.sin.sin_addr;
+      if (c->peer.is_ip6) {
-      c->peer.port = usa.sin.sin_port;
+#if MG_ENABLE_IPV6
+        memcpy(c->peer.ip6, &usa.sin6.sin6_addr, sizeof(c->peer.ip6));
+        c->peer.port = usa.sin6.sin6_port;
+#endif
+      } else {
+        c->peer.ip = *(uint32_t *) &usa.sin.sin_addr;
+        c->peer.port = usa.sin.sin_port;
+      }
     }
   } else {
-    n = recv(FD(c), buf, len, 0);
+    n = recv(FD(c), (char *) buf, len, MSG_NONBLOCKING);
   }
   *fail = (n == 0) || (n < 0 && mg_sock_failed());
   return n;
@@ -89,9 +114,13 @@ static int mg_sock_send(struct mg_connection *c, const void *buf, int len,
   int n = 0;
   if (c->is_udp) {
     union usa usa = tousa(&c->peer);
-    n = sendto(FD(c), buf, len, 0, &usa.sa, sizeof(usa.sin));
+    socklen_t slen = sizeof(usa.sin);
+#if MG_ENABLE_IPV6
+    if (c->peer.is_ip6) slen = sizeof(usa.sin6);
+#endif
+    n = sendto(FD(c), (char *) buf, len, 0, &usa.sa, slen);
   } else {
-    n = send(FD(c), buf, len, 0);
+    n = send(FD(c), (char *) buf, len, MSG_NONBLOCKING);
   }
   *fail = (n == 0) || (n < 0 && mg_sock_failed());
   return n;
@@ -101,12 +130,12 @@ static int ll_read(struct mg_connection *c, void *buf, int len, int *fail) {
   int n = c->is_tls ? mg_tls_recv(c, buf, len, fail)
                     : mg_sock_recv(c, buf, len, fail);
   LOG(*fail ? LL_DEBUG : LL_VERBOSE_DEBUG,
-      ("%p %c%c%c %d/%d %d %d", c->fd, c->is_tls ? 'T' : 't',
+      ("%lu %c%c%c %d/%d %d %d", c->id, c->is_tls ? 'T' : 't',
        c->is_udp ? 'U' : 'u', c->is_connecting ? 'C' : 'c', n, len,
        MG_SOCK_ERRNO, *fail));
   if (n > 0 && c->is_hexdumping) {
-    char *s = mg_hexdump(buf, len);
+    char *s = mg_hexdump(buf, n);
-    LOG(LL_INFO, ("\n-- %p %s %s %d\n%s--", c->fd, c->label, "<-", len, s));
+    LOG(LL_INFO, ("\n-- %lu %s %s %d\n%s--", c->id, c->label, "<-", n, s));
     free(s);
   }
   return n;
@@ -117,12 +146,12 @@ static int ll_write(struct mg_connection *c, const void *buf, int len,
   int n = c->is_tls ? mg_tls_send(c, buf, len, fail)
                     : mg_sock_send(c, buf, len, fail);
   LOG(*fail ? LL_ERROR : LL_VERBOSE_DEBUG,
-      ("%p %c%c%c %d/%d %d", c->fd, c->is_tls ? 'T' : 't',
+      ("%lu %c%c%c %d/%d %d", c->id, c->is_tls ? 'T' : 't',
        c->is_udp ? 'U' : 'u', c->is_connecting ? 'C' : 'c', n, len,
        MG_SOCK_ERRNO));
   if (n > 0 && c->is_hexdumping) {
     char *s = mg_hexdump(buf, len);
-    LOG(LL_INFO, ("\n-- %p %s %s %d\n%s--", c->fd, c->label, "->", len, s));
+    LOG(LL_INFO, ("\n-- %lu %s %s %d\n%s--", c->id, c->label, "->", len, s));
     free(s);
   }
   return n;
@@ -132,6 +161,7 @@ int mg_send(struct mg_connection *c, const void *buf, size_t len) {
   int fail, n = c->is_udp
                     ? ll_write(c, buf, (SOCKET) len, &fail)
                     : (int) mg_iobuf_append(&c->send, buf, len, MG_IO_SIZE);
+  if (len > 0 && n == 0) fail = 1;
   return n;
 }
 
@@ -148,46 +178,51 @@ static void mg_set_non_blocking_mode(SOCKET fd) {
 #endif
 }
 
-SOCKET mg_open_listener(const char *ip, uint16_t port, int is_udp) {
+SOCKET mg_open_listener(const char *url) {
-  union usa usa;
+  struct mg_addr addr;
-  int on = 1;
+  SOCKET fd = INVALID_SOCKET;
-  int proto = is_udp ? IPPROTO_UDP : IPPROTO_TCP;
-  int type = is_udp ? SOCK_DGRAM : SOCK_STREAM;
-  SOCKET fd;
 
-  memset(&usa, 0, sizeof(usa));
+  memset(&addr, 0, sizeof(addr));
-  usa.sin.sin_family = AF_INET;
+  addr.port = mg_htons(mg_url_port(url));
-  usa.sin.sin_port = mg_htons(port);
+  if (!mg_aton(mg_url_host(url), &addr)) {
-  mg_aton(ip, (uint32_t *) &usa.sin.sin_addr);
+    LOG(LL_ERROR, ("invalid listening URL: %s", url));
-  if (!mg_casecmp(ip, "localhost")) {
+  } else {
-    *(uint32_t *) &usa.sin.sin_addr = mg_htonl(0x7f000001);
+    union usa usa = tousa(&addr);
-  }
+    int on = 1, af = AF_INET;
+    int type = strncmp(url, "udp:", 4) == 0 ? SOCK_DGRAM : SOCK_STREAM;
+    int proto = type == SOCK_DGRAM ? IPPROTO_UDP : IPPROTO_TCP;
+    socklen_t slen = sizeof(usa.sin);
+#if MG_ENABLE_IPV6
+    if (addr.is_ip6) af = AF_INET6, slen = sizeof(usa.sin6);
+#endif
 
-  if ((fd = socket(AF_INET, type, proto)) != INVALID_SOCKET &&
+    if ((fd = socket(af, type, proto)) != INVALID_SOCKET &&
 #if !defined(_WIN32) || !defined(SO_EXCLUSIVEADDRUSE)
-      // SO_RESUSEADDR is not enabled on Windows because the semantics of
+        // SO_RESUSEADDR is not enabled on Windows because the semantics of
-      // SO_REUSEADDR on UNIX and Windows is different. On Windows,
+        // SO_REUSEADDR on UNIX and Windows is different. On Windows,
-      // SO_REUSEADDR allows to bind a socket to a port without error even if
+        // SO_REUSEADDR allows to bind a socket to a port without error even if
-      // the port is already open by another program. This is not the behavior
+        // the port is already open by another program. This is not the behavior
-      // SO_REUSEADDR was designed for, and leads to hard-to-track failure
+        // SO_REUSEADDR was designed for, and leads to hard-to-track failure
-      // scenarios. Therefore, SO_REUSEADDR was disabled on Windows unless
+        // scenarios. Therefore, SO_REUSEADDR was disabled on Windows unless
-      // SO_EXCLUSIVEADDRUSE is supported and set on a socket.
+        // SO_EXCLUSIVEADDRUSE is supported and set on a socket.
-      !setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof(on)) &&
+        !setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on)) &&
 #endif
 #if defined(_WIN32) && defined(SO_EXCLUSIVEADDRUSE) && !defined(WINCE)
-      // "Using SO_REUSEADDR and SO_EXCLUSIVEADDRUSE"
+        // "Using SO_REUSEADDR and SO_EXCLUSIVEADDRUSE"
-      !setsockopt(fd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (void *) &on,
+        //! setsockopt(fd, SOL_SOCKET, SO_BROADCAST, (char *) &on, sizeof(on))
-                  sizeof(on)) &&
+        //! &&
+        !setsockopt(fd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char *) &on,
+                    sizeof(on)) &&
 #endif
-      bind(fd, &usa.sa, sizeof(usa.sin)) == 0 &&
+        bind(fd, &usa.sa, slen) == 0 &&
-      // NOTE(lsm): FreeRTOS uses backlog value as a connection limit
+        // NOTE(lsm): FreeRTOS uses backlog value as a connection limit
-      (type == SOCK_DGRAM || listen(fd, 128) == 0)) {
+        (type == SOCK_DGRAM || listen(fd, 128) == 0)) {
-    mg_set_non_blocking_mode(fd);
+      mg_set_non_blocking_mode(fd);
-  } else if (fd >= 0) {
+    } else if (fd != INVALID_SOCKET) {
-    LOG(LL_ERROR,
+      LOG(LL_ERROR, ("Failed to listen on %s, errno %d", url, MG_SOCK_ERRNO));
-        ("Failed to listen on %s:%hu, errno %d", ip, port, MG_SOCK_ERRNO));
+      closesocket(fd);
-    closesocket(fd);
+      fd = INVALID_SOCKET;
-    fd = INVALID_SOCKET;
+    }
   }
 
   return fd;
@@ -201,8 +236,9 @@ static void read_conn(struct mg_connection *c,
   // NOTE(lsm): do only one iteration of reads, cause some systems
   // (e.g. FreeRTOS stack) return 0 instead of -1/EWOULDBLOCK when no data
   if (c->recv.size - c->recv.len < MG_IO_SIZE &&
-      c->recv.size < MG_MAX_RECV_BUF_SIZE) {
+      c->recv.size < MG_MAX_RECV_BUF_SIZE &&
-    mg_iobuf_resize(&c->recv, c->recv.size + MG_IO_SIZE);
+      !mg_iobuf_resize(&c->recv, c->recv.size + MG_IO_SIZE)) {
+    c->is_closing = 1;
   }
   buf = c->recv.buf + c->recv.len;
   len = (int) (c->recv.size - c->recv.len);
@@ -228,22 +264,19 @@ static int write_conn(struct mg_connection *c) {
   return rc;
 }
 
-static void close_conn(struct mg_mgr *mgr, struct mg_connection *c) {
+static void close_conn(struct mg_connection *c) {
   // Unlink this connection from the list
-  LIST_DELETE(struct mg_connection, &mgr->conns, c);
+  LIST_DELETE(struct mg_connection, &c->mgr->conns, c);
-#if 0
+  mg_resolve_cancel(c);
-  struct mg_connection **head = &mgr->conns;
+  if (c == c->mgr->dns4.c) c->mgr->dns4.c = NULL;
-  while (*head != c) head = &(*head)->next;
+  if (c == c->mgr->dns6.c) c->mgr->dns6.c = NULL;
-  *head = c->next;
-#endif
-  mg_resolve_cancel(mgr, c);
   mg_call(c, MG_EV_CLOSE, NULL);
   // while (c->callbacks != NULL) mg_fn_del(c, c->callbacks->fn);
-  LOG(LL_DEBUG, ("%p closed", c->fd));
+  LOG(LL_DEBUG, ("%lu closed", c->id));
   if (FD(c) != INVALID_SOCKET) {
     closesocket(FD(c));
 #if MG_ARCH == MG_ARCH_FREERTOS
-    FreeRTOS_FD_CLR(c->fd, mgr->ss, eSELECT_ALL);
+    FreeRTOS_FD_CLR(c->fd, c->mgr->ss, eSELECT_ALL);
 #endif
   }
   mg_tls_free(c);
@@ -251,29 +284,31 @@ static void close_conn(struct mg_mgr *mgr, struct mg_connection *c) {
   free(c->send.buf);
   memset(c, 0, sizeof(*c));
   free(c);
-  if (c == mgr->dnsc) mgr->dnsc = NULL;
 }
 
 static void setsockopts(struct mg_connection *c) {
 #if MG_ARCH == MG_ARCH_FREERTOS
   FreeRTOS_FD_SET(c->fd, c->mgr->ss, eSELECT_READ | eSELECT_EXCEPT);
 #else
-  int on = 1, cnt = 3, intvl = 20;
+  int on = 1;
 #if !defined(SOL_TCP)
 #define SOL_TCP IPPROTO_TCP
 #endif
-  setsockopt(FD(c), SOL_TCP, TCP_NODELAY, (void *) &on, sizeof(on));
+  setsockopt(FD(c), SOL_TCP, TCP_NODELAY, (char *) &on, sizeof(on));
 #if defined(TCP_QUICKACK)
-  setsockopt(FD(c), SOL_TCP, TCP_QUICKACK, (void *) &on, sizeof(on));
+  setsockopt(FD(c), SOL_TCP, TCP_QUICKACK, (char *) &on, sizeof(on));
 #endif
-  setsockopt(FD(c), SOL_SOCKET, SO_KEEPALIVE, (void *) &on, sizeof(on));
+  setsockopt(FD(c), SOL_SOCKET, SO_KEEPALIVE, (char *) &on, sizeof(on));
 #if ESP32 || ESP8266 || defined(__linux__)
   int idle = 60;
   setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPIDLE, &idle, sizeof(idle));
 #endif
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(__QNX__)
-  setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPCNT, &cnt, sizeof(cnt));
+  {
-  setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPINTVL, &intvl, sizeof(intvl));
+    int cnt = 3, intvl = 20;
+    setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPCNT, &cnt, sizeof(cnt));
+    setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPINTVL, &intvl, sizeof(intvl));
+  }
 #endif
 #endif
 }
@@ -281,12 +316,27 @@ static void setsockopts(struct mg_connection *c) {
 void mg_connect_resolved(struct mg_connection *c) {
   char buf[40];
   int type = c->is_udp ? SOCK_DGRAM : SOCK_STREAM;
-  mg_call(c, MG_EV_RESOLVE, NULL);
+  int af = AF_INET;
+#if MG_ENABLE_IPV6
+  if (c->peer.is_ip6) af = AF_INET6;
+#endif
   mg_straddr(c, buf, sizeof(buf));
-  LOG(LL_DEBUG, ("%p resolved: %s", c->fd, buf));
+  c->fd = (void *) (long) socket(af, type, 0);
+  if (FD(c) == INVALID_SOCKET) {
+    mg_error(c, "socket(): %d", MG_SOCK_ERRNO);
+    return;
+  }
+
+  mg_set_non_blocking_mode(FD(c));
+  mg_call(c, MG_EV_RESOLVE, NULL);
   if (type == SOCK_STREAM) {
     union usa usa = tousa(&c->peer);
-    int rc = connect(FD(c), &usa.sa, sizeof(usa.sin));
+    socklen_t slen =
+#if MG_ENABLE_IPV6
+        c->peer.is_ip6 ? sizeof(usa.sin6) :
+#endif
+                       sizeof(usa.sin);
+    int rc = connect(FD(c), &usa.sa, slen);
     int fail = rc < 0 && mg_sock_failed() ? MG_SOCK_ERRNO : 0;
     if (fail) {
       mg_error(c, "connect: %d", MG_SOCK_ERRNO);
@@ -300,21 +350,17 @@ void mg_connect_resolved(struct mg_connection *c) {
 struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *url,
                                  mg_event_handler_t fn, void *fn_data) {
   struct mg_connection *c = NULL;
-  int fd, type = strncmp(url, "udp:", 4) == 0 ? SOCK_DGRAM : SOCK_STREAM;
+  if ((c = alloc_conn(mgr, 1, INVALID_SOCKET)) == NULL) {
-  if ((fd = socket(AF_INET, type, 0)) == INVALID_SOCKET) {
+    LOG(LL_ERROR, ("OOM"));
-    LOG(LL_ERROR, ("socket(): %d", MG_SOCK_ERRNO));
-  } else if ((c = alloc_conn(mgr, 1, fd)) == NULL) {
-    LOG(LL_ERROR, ("%p OOM", c->fd));
   } else {
     struct mg_str host = mg_url_host(url);
     LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c);
-    mg_set_non_blocking_mode(FD(c));
+    c->is_udp = (strncmp(url, "udp:", 4) == 0);
-    c->is_udp = type == SOCK_DGRAM;
     c->peer.port = mg_htons(mg_url_port(url));
     c->fn = fn;
     c->fn_data = fn_data;
-    LOG(LL_DEBUG, ("%p -> %s", c->fd, url));
+    LOG(LL_DEBUG, ("%lu -> %s", c->id, url));
-    mg_resolve(mgr, c, &host, mgr->dnstimeout);
+    mg_resolve(c, &host, mgr->dnstimeout);
   }
   return c;
 }
@@ -322,25 +368,31 @@ struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *url,
 static void accept_conn(struct mg_mgr *mgr, struct mg_connection *lsn) {
   struct mg_connection *c = NULL;
   union usa usa;
-  socklen_t sa_len = sizeof(usa.sin);
+  socklen_t sa_len = sizeof(usa);
   SOCKET fd = accept(FD(lsn), &usa.sa, &sa_len);
   if (fd == INVALID_SOCKET) {
-    LOG(LL_ERROR,
+    LOG(LL_ERROR, ("%lu accept failed, errno %d", lsn->id, MG_SOCK_ERRNO));
-        ("%p accept(%d) failed, errno %d", lsn->fd, FD(lsn), MG_SOCK_ERRNO));
 #if !defined(_WIN32)
   } else if (fd >= FD_SETSIZE) {
     LOG(LL_ERROR, ("%ld > %ld", (long) fd, (long) FD_SETSIZE));
     closesocket(fd);
 #endif
   } else if ((c = alloc_conn(mgr, 0, fd)) == NULL) {
-    LOG(LL_ERROR, ("%p OOM", lsn->fd));
+    LOG(LL_ERROR, ("%lu OOM", lsn->id));
     closesocket(fd);
   } else {
     char buf[40];
     c->peer.port = usa.sin.sin_port;
     memcpy(&c->peer.ip, &usa.sin.sin_addr, sizeof(c->peer.ip));
+#if MG_ENABLE_IPV6
+    if (sa_len == sizeof(usa.sin6)) {
+      memcpy(c->peer.ip6, &usa.sin6.sin6_addr, sizeof(c->peer.ip6));
+      c->peer.port = usa.sin6.sin6_port;
+      c->peer.is_ip6 = 1;
+    }
+#endif
     mg_straddr(c, buf, sizeof(buf));
-    LOG(LL_DEBUG, ("%p accepted %s", c->fd, buf));
+    LOG(LL_DEBUG, ("%lu accepted %s", c->id, buf));
     mg_set_non_blocking_mode(FD(c));
     setsockopts(c);
     LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c);
@@ -356,17 +408,20 @@ static void accept_conn(struct mg_mgr *mgr, struct mg_connection *lsn) {
 
 #if MG_ENABLE_SOCKETPAIR
 bool mg_socketpair(int *s1, int *s2) {
-#if MG_ARCH == MG_ARCH_UNIX
+#ifdef MG_ENABLE_NATIVE_SOCKETPAIR
+  // For some reason, native socketpair() call fails on Macos
+  // Enable this codepath only when MG_ENABLE_NATIVE_SOCKETPAIR is defined
   int sp[2], ret = 0;
-  if (socketpair(AF_INET, SOCK_DGRAM, 0, sp) == 0) {
+  if (socketpair(AF_INET, SOCK_DGRAM, IPPROTO_UDP, sp) == 0) {
     *s1 = sp[0], *s2 = sp[1], ret = 1;
   }
+  LOG(LL_INFO, ("errno %d", errno));
   return ret;
 #else
   union usa sa, sa2;
   SOCKET sp[2] = {INVALID_SOCKET, INVALID_SOCKET};
   socklen_t len = sizeof(sa.sin);
-  int ret = 0, res[2] = {-1, -1};
+  int ret = 0;
 
   (void) memset(&sa, 0, sizeof(sa));
   sa.sin.sin_family = AF_INET;
@@ -397,8 +452,7 @@ struct mg_connection *mg_listen(struct mg_mgr *mgr, const char *url,
                                 mg_event_handler_t fn, void *fn_data) {
   struct mg_connection *c = NULL;
   int is_udp = strncmp(url, "udp:", 4) == 0;
-  struct mg_str host = mg_url_host(url);
+  SOCKET fd = mg_open_listener(url);
-  SOCKET fd = mg_open_listener(host.ptr, mg_url_port(url), is_udp);
   if (fd == INVALID_SOCKET) {
   } else if ((c = alloc_conn(mgr, 0, fd)) == NULL) {
     LOG(LL_ERROR, ("OOM %s", url));
@@ -411,7 +465,7 @@ struct mg_connection *mg_listen(struct mg_mgr *mgr, const char *url,
     LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c);
     c->fn = fn;
     c->fn_data = fn_data;
-    LOG(LL_INFO, ("%p accepting on %s", c->fd, url));
+    LOG(LL_INFO, ("%lu accepting on %s", c->id, url));
   }
   return c;
 }
@@ -449,7 +503,6 @@ static void mg_iotest(struct mg_mgr *mgr, int ms) {
     if (FD(c) > maxfd) maxfd = FD(c);
     if (c->is_connecting || (c->send.len > 0 && c->is_tls_hs == 0))
       FD_SET(FD(c), &wset);
-    // LOG(LL_INFO, ("%d %d", c->fd, FD_ISSET(c->fd, &wset)));
   }
 
   if ((rc = select(maxfd + 1, &rset, &wset, NULL, &tv)) < 0) {
@@ -478,11 +531,8 @@ static void connect_conn(struct mg_connection *c) {
     char buf[40];
     mg_error(c, "error connecting to %s", mg_straddr(c, buf, sizeof(buf)));
   } else {
-    if (c->is_tls_hs && mg_tls_handshake(c)) {
+    if (c->is_tls_hs) mg_tls_handshake(c);
-      c->is_tls_hs = 0;
+    mg_call(c, MG_EV_CONNECT, NULL);
-      mg_call(c, MG_EV_CONNECT, NULL);
-    }
-    if (c->is_tls == 0) mg_call(c, MG_EV_CONNECT, NULL);
   }
 }
 
@@ -498,59 +548,25 @@ void mg_mgr_poll(struct mg_mgr *mgr, int ms) {
     tmp = c->next;
     mg_call(c, MG_EV_POLL, &now);
     LOG(LL_VERBOSE_DEBUG,
-        ("%p %c%c %c%c%c%c%c", c->fd, c->is_readable ? 'r' : '-',
+        ("%lu %c%c %c%c%c%c%c", c->id, c->is_readable ? 'r' : '-',
          c->is_writable ? 'w' : '-', c->is_tls ? 'T' : 't',
          c->is_connecting ? 'C' : 'c', c->is_tls_hs ? 'H' : 'h',
          c->is_resolving ? 'R' : 'r', c->is_closing ? 'C' : 'c'));
     if (c->is_resolving || c->is_closing) {
       // Do nothing
-    } else if (c->is_listening) {
+    } else if (c->is_listening && c->is_udp == 0) {
       if (c->is_readable) accept_conn(mgr, c);
-#if 0
-    } else if (c->is_accepted && c->is_tls_hs) {
-      if (mg_tls_handshake(c)) c->is_tls_hs = 0;
-#endif
     } else if (c->is_connecting) {
-      if (c->is_readable || c->is_writable) {
+      if (c->is_readable || c->is_writable) connect_conn(c);
-        connect_conn(c);
-      }
     } else if (c->is_tls_hs) {
-      if ((c->is_readable || c->is_writable) && mg_tls_handshake(c)) {
+      if ((c->is_readable || c->is_writable)) mg_tls_handshake(c);
-        c->is_tls_hs = 0;
-        mg_call(c, MG_EV_CONNECT, NULL);
-      }
     } else {
       if (c->is_readable) read_conn(c, ll_read);
       if (c->is_writable) write_conn(c);
     }
 
     if (c->is_draining && c->send.len == 0) c->is_closing = 1;
-    if (c->is_closing) close_conn(mgr, c);
+    if (c->is_closing) close_conn(c);
   }
 }
-
-void mg_mgr_free(struct mg_mgr *mgr) {
-  struct mg_connection *c;
-  for (c = mgr->conns; c != NULL; c = c->next) c->is_closing = 1;
-  mg_mgr_poll(mgr, 0);
-#if MG_ARCH == MG_ARCH_FREERTOS
-  FreeRTOS_DeleteSocketSet(mgr->ss);
-#endif
-  LOG(LL_INFO, ("All connections closed"));
-}
-
-void mg_mgr_init(struct mg_mgr *mgr) {
-#ifdef _WIN32
-  WSADATA data;
-  WSAStartup(MAKEWORD(2, 2), &data);
-#elif MG_ARCH == MG_ARCH_FREERTOS
-  mgr->ss = FreeRTOS_CreateSocketSet();
-#elif defined(__unix) || defined(__unix__) || defined(__APPLE__)
-  // Ignore SIGPIPE signal, so if client cancels the request, it
-  // won't kill the whole process.
-  signal(SIGPIPE, SIG_IGN);
-#endif
-  memset(mgr, 0, sizeof(*mgr));
-  mgr->dnstimeout = 3000;
-}
 #endif

src/ssi.c

@@ -0,0 +1,84 @@
+#include "ssi.h"
+#include "log.h"
+#include "util.h"
+
+#ifndef MG_MAX_SSI_DEPTH
+#define MG_MAX_SSI_DEPTH 5
+#endif
+
+#if MG_ENABLE_SSI
+static char *mg_ssi(const char *path, const char *root, int depth) {
+  struct mg_iobuf b = {NULL, 0, 0};
+  FILE *fp = mg_fopen(path, "rb");
+  if (fp != NULL) {
+    char buf[BUFSIZ], arg[sizeof(buf)];
+    int ch, intag = 0;
+    size_t len = 0, align = MG_IO_SIZE;
+    while ((ch = fgetc(fp)) != EOF) {
+      if (intag && ch == '>' && buf[len - 1] == '-' && buf[len - 2] == '-') {
+        buf[len++] = ch & 0xff;
+        if (sscanf(buf, "<!--#include file=\"%[^\"]", arg)) {
+          char tmp[MG_PATH_MAX], *p = (char *) path + strlen(path), *data;
+          while (p > path && p[-1] != MG_DIRSEP && p[-1] != '/') p--;
+          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_append(&b, data, strlen(data), align);
+            free(data);
+          } else {
+            LOG(LL_ERROR, ("%s: file=%s error or too deep", path, arg));
+          }
+        } else if (sscanf(buf, "<!--#include virtual=\"%[^\"]", arg)) {
+          char tmp[MG_PATH_MAX], *data;
+          snprintf(tmp, sizeof(tmp), "%s%s", root, arg);
+          if (depth < MG_MAX_SSI_DEPTH &&
+              (data = mg_ssi(tmp, root, depth + 1)) != NULL) {
+            mg_iobuf_append(&b, data, strlen(data), align);
+            free(data);
+          } else {
+            LOG(LL_ERROR, ("%s: virtual=%s error or too deep", path, arg));
+          }
+        } else {
+          // Unknown SSI tag
+          LOG(LL_INFO, ("Unknown SSI tag: %.*s", (int) len, buf));
+          mg_iobuf_append(&b, buf, len, align);
+        }
+        intag = 0;
+        len = 0;
+      } else if (ch == '<') {
+        intag = 1;
+        if (len > 0) mg_iobuf_append(&b, buf, len, align);
+        len = 0;
+        buf[len++] = ch & 0xff;
+      } else if (intag) {
+        if (len == 5 && strncmp(buf, "<!--#", 5) != 0) {
+          intag = 0;
+        } else if (len >= sizeof(buf) - 2) {
+          LOG(LL_ERROR, ("%s: SSI tag is too large", path));
+          len = 0;
+        }
+        buf[len++] = ch & 0xff;
+      } else {
+        buf[len++] = ch & 0xff;
+        if (len >= sizeof(buf)) {
+          mg_iobuf_append(&b, buf, len, align);
+          len = 0;
+        }
+      }
+    }
+    if (len > 0) mg_iobuf_append(&b, buf, len, align);
+    if (b.len > 0) mg_iobuf_append(&b, "", 1, align);  // nul-terminate
+    fclose(fp);
+  }
+  (void) depth;
+  (void) root;
+  return (char *) b.buf;
+}
+
+void mg_http_serve_ssi(struct mg_connection *c, const char *root,
+                       const char *fullpath) {
+  char *data = mg_ssi(fullpath, root, 0);
+  mg_http_reply(c, 200, "", "%s", data == NULL ? "" : data);
+  free(data);
+}
+#endif

src/ssi.h

@@ -0,0 +1,4 @@
+#pragma once
+#include "http.h"
+void mg_http_serve_ssi(struct mg_connection *c, const char *root,
+                       const char *fullpath);

src/tls.c

@@ -8,13 +8,15 @@
 #include <mbedtls/debug.h>
 #include <mbedtls/ssl.h>
 
-// Different versions have those in different files, so declare here
+#ifndef EXTERN_C
 #ifdef __cplusplus
 #define EXTERN_C extern "C"
 #else
 #define EXTERN_C
 #endif
+#endif
 
+// Different versions have those in different files, so declare here
 EXTERN_C int mbedtls_net_recv(void *, unsigned char *, size_t);
 EXTERN_C int mbedtls_net_send(void *, const unsigned char *, size_t);
 
@@ -33,11 +35,12 @@ int mg_tls_handshake(struct mg_connection *c) {
   mbedtls_ssl_set_bio(&tls->ssl, &c->fd, mbedtls_net_send, mbedtls_net_recv, 0);
   rc = mbedtls_ssl_handshake(&tls->ssl);
   if (rc == 0) {  // Success
-    LOG(LL_DEBUG, ("%p OK", c->fd));
+    LOG(LL_DEBUG, ("%lu success", c->id));
+    c->is_tls_hs = 0;
   } else if (rc == MBEDTLS_ERR_SSL_WANT_READ ||
              rc == MBEDTLS_ERR_SSL_WANT_WRITE) {  // Still pending
-    LOG(LL_VERBOSE_DEBUG, ("%p pending, %d%d %d (-%#x)", c->fd, c->is_connecting,
+    LOG(LL_VERBOSE_DEBUG, ("%lu pending, %d%d %d (-%#x)", c->id,
-                   c->is_tls_hs, rc, -rc));
+                           c->is_connecting, c->is_tls_hs, rc, -rc));
   } else {
     mg_error(c, "TLS handshake: -%#x", -rc);  // Error
   }
@@ -61,8 +64,14 @@ static void debug_cb(void *c, int lev, const char *s, int n, const char *s2) {
 int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts) {
   struct mg_tls *tls = (struct mg_tls *) calloc(1, sizeof(*tls));
   int rc = 0;
-  LOG(LL_DEBUG, ("%p Setting TLS, CA: %s, cert: %s, key: %s", c->fd,
+  const char *ca = opts->ca == NULL     ? "-"
-                 opts->ca == NULL ? "null" : opts->ca,
+                   : opts->ca[0] == '-' ? "(emb)"
+                                        : opts->ca;
+  if (tls == NULL) {
+    mg_error(c, "TLS OOM");
+    goto fail;
+  }
+  LOG(LL_DEBUG, ("%lu Setting TLS, CA: %s, cert: %s, key: %s", c->id, ca,
                  opts->cert == NULL ? "null" : opts->cert,
                  opts->certkey == NULL ? "null" : opts->certkey));
   mbedtls_ssl_init(&tls->ssl);
@@ -87,17 +96,26 @@ int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts) {
     tls->cafile = strdup(opts->ca);
     rc = mbedtls_ssl_conf_ca_chain_file(&tls->conf, tls->cafile, NULL);
     if (rc != 0) {
-      mg_error(c, "parse on-disk chain(%s) err %#x", opts->ca, -rc);
+      mg_error(c, "parse on-disk chain(%s) err %#x", ca, -rc);
       goto fail;
     }
 #else
     mbedtls_x509_crt_init(&tls->ca);
-    if ((rc = mbedtls_x509_crt_parse_file(&tls->ca, opts->ca)) != 0) {
+    rc = opts->ca[0] == '-'
-      mg_error(c, "parse(%s) err %#x", opts->ca, -rc);
+             ? mbedtls_x509_crt_parse(&tls->ca, (uint8_t *) opts->ca,
+                                      strlen(opts->ca) + 1)
+             : mbedtls_x509_crt_parse_file(&tls->ca, opts->ca);
+    if (rc != 0) {
+      mg_error(c, "parse(%s) err %#x", ca, -rc);
       goto fail;
     }
     mbedtls_ssl_conf_ca_chain(&tls->conf, &tls->ca, NULL);
 #endif
+    if (opts->srvname.len > 0) {
+      char buf[opts->srvname.len + 1];
+      sprintf(buf, "%.*s", (int) opts->srvname.len, opts->srvname.ptr);
+      mbedtls_ssl_set_hostname(&tls->ssl, buf);
+    }
     mbedtls_ssl_conf_authmode(&tls->conf, MBEDTLS_SSL_VERIFY_REQUIRED);
   }
   if (opts->cert != NULL && opts->cert[0] != '\0') {
@@ -126,6 +144,9 @@ int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts) {
   c->tls = tls;
   c->is_tls = 1;
   c->is_tls_hs = 1;
+  if (c->is_client && c->is_resolving == 0 && c->is_connecting == 0) {
+    mg_tls_handshake(c);
+  }
   return 1;
 fail:
   c->is_closing = 1;
@@ -162,7 +183,6 @@ int mg_tls_free(struct mg_connection *c) {
 }
 #elif MG_ENABLE_OPENSSL  ///////////////////////////////////////// OPENSSL
 
-#include <openssl/bio.h>
 #include <openssl/err.h>
 #include <openssl/ssl.h>
 
@@ -192,11 +212,17 @@ int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts) {
   const char *id = "mongoose";
   static unsigned char s_initialised = 0;
   int rc;
+
+  if (tls == NULL) {
+    mg_error(c, "TLS OOM");
+    goto fail;
+  }
+
   if (!s_initialised) {
     SSL_library_init();
     s_initialised++;
   }
-  LOG(LL_DEBUG, ("%p Setting TLS, CA: %s, cert: %s, key: %s", c->fd,
+  LOG(LL_DEBUG, ("%lu Setting TLS, CA: %s, cert: %s, key: %s", c->id,
                  opts->ca == NULL ? "null" : opts->ca,
                  opts->cert == NULL ? "null" : opts->cert,
                  opts->certkey == NULL ? "null" : opts->certkey));
@@ -219,12 +245,12 @@ int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts) {
 #endif
 
   if (opts->ca != NULL && opts->ca[0] != '\0') {
+    SSL_set_verify(tls->ssl, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
+                   NULL);
     if ((rc = SSL_CTX_load_verify_locations(tls->ctx, opts->ca, NULL)) != 1) {
       mg_error(c, "parse(%s): err %d", opts->ca, mg_tls_err(tls, rc));
       goto fail;
     }
-    SSL_set_verify(tls->ssl, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
-                   0);
   }
   if (opts->cert != NULL && opts->cert[0] != '\0') {
     const char *key = opts->certkey;
@@ -235,10 +261,12 @@ int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts) {
     } else if ((rc = SSL_use_PrivateKey_file(tls->ssl, key, 1)) != 1) {
       mg_error(c, "Invalid SSL key, err %d", mg_tls_err(tls, rc));
       goto fail;
+#if OPENSSL_VERSION_NUMBER > 0x10002000L
     } else if ((rc = SSL_use_certificate_chain_file(tls->ssl, opts->cert)) !=
                1) {
       mg_error(c, "Invalid CA, err %d", mg_tls_err(tls, rc));
       goto fail;
+#endif
     } else {
       SSL_set_mode(tls->ssl, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
 #if OPENSSL_VERSION_NUMBER > 0x10002000L
@@ -247,10 +275,19 @@ int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts) {
     }
   }
   if (opts->ciphers != NULL) SSL_set_cipher_list(tls->ssl, opts->ciphers);
-  if (opts->srvname != NULL) SSL_set_tlsext_host_name(tls->ssl, opts->srvname);
+  if (opts->srvname.len > 0) {
+    char buf[opts->srvname.len + 1];
+    sprintf(buf, "%.*s", (int) opts->srvname.len, opts->srvname.ptr);
+    SSL_set_tlsext_host_name(tls->ssl, buf);
+  }
   c->tls = tls;
   c->is_tls = 1;
   c->is_tls_hs = 1;
+  if (c->is_client && c->is_resolving == 0 && c->is_connecting == 0) {
+    mg_tls_handshake(c);
+  }
+  c->is_hexdumping = 1;
+  LOG(LL_DEBUG, ("%lu SSL %s OK", c->id, c->is_accepted ? "accept" : "client"));
   return 1;
 fail:
   c->is_closing = 1;
@@ -261,14 +298,16 @@ fail:
 int mg_tls_handshake(struct mg_connection *c) {
   struct mg_tls *tls = (struct mg_tls *) c->tls;
   int rc;
-  // if (SSL_get_fd(tls->ssl) == -1)
+  SSL_set_fd(tls->ssl, (long) c->fd);
-  SSL_set_fd(tls->ssl, (int) c->fd);
   rc = c->is_client ? SSL_connect(tls->ssl) : SSL_accept(tls->ssl);
   if (rc == 1) {
+    LOG(LL_DEBUG, ("%lu success", c->id));
+    c->is_tls_hs = 0;
     return 1;
   } else {
+    int code;
     ERR_print_errors_fp(stderr);
-    int code = mg_tls_err(tls, rc);
+    code = mg_tls_err(tls, rc);
     if (code != 0) mg_error(c, "tls hs: rc %d, err %d", rc, code);
     return 0;
   }

src/tls.h

@@ -2,11 +2,11 @@
 #include "net.h"
 
 struct mg_tls_opts {
-  const char *ca;        // CA certificate file. For both listeners and clients
+  const char *ca;         // CA certificate file. For both listeners and clients
-  const char *cert;      // Certificate
+  const char *cert;       // Certificate
-  const char *certkey;   // Certificate key
+  const char *certkey;    // Certificate key
-  const char *ciphers;   // Cipher list
+  const char *ciphers;    // Cipher list
-  const char *srvname;   // If not NULL, enables server name verification
+  struct mg_str srvname;  // If not empty, enables server name verification
 };
 
 int mg_tls_init(struct mg_connection *, struct mg_tls_opts *);

src/url.c

@@ -1,5 +1,5 @@
-#include "url.h"
 #include <stdlib.h>
+#include "url.h"
 
 struct url {
   int key, user, pass, host, port, uri, end;
@@ -19,6 +19,8 @@ static struct url urlparse(const char *url) {
     if (i > 0 && url[i - 1] == '/' && url[i] == '/') {
       u.host = i + 1;
       u.port = 0;
+    } else if (url[i] == ']') {
+      u.port = 0;  // IPv6 URLs, like http://[::1]/bar
     } else if (url[i] == ':') {
       u.port = i + 1;
     } else if (url[i] == '@') {
@@ -41,7 +43,12 @@ struct mg_str mg_url_host(const char *url) {
   struct url u = urlparse(url);
   int n =
       u.port ? u.port - u.host - 1 : u.uri ? u.uri - u.host : u.end - u.host;
-  return mg_str_n(url + u.host, n);
+  struct mg_str s = mg_str_n(url + u.host, n);
+  if (s.len > 2 && s.ptr[0] == '[' && s.ptr[s.len - 1] == ']') {
+    s.len -= 2;
+    s.ptr++;
+  }
+  return s;
 }
 
 const char *mg_url_uri(const char *url) {
@@ -52,7 +59,7 @@ const char *mg_url_uri(const char *url) {
 unsigned short mg_url_port(const char *url) {
   struct url u = urlparse(url);
   unsigned short port = 0;
-  if (memcmp(url, "http:", 5) == 0) port = 80;
+  if (memcmp(url, "http:", 5) == 0 || memcmp(url, "ws:", 3) == 0) port = 80;
   if (memcmp(url, "wss:", 4) == 0 || memcmp(url, "https:", 6) == 0) port = 443;
   if (memcmp(url, "mqtt:", 5) == 0) port = 1883;
   if (memcmp(url, "mqtts:", 6) == 0) port = 8883;

src/util.c

@@ -1,20 +1,43 @@
+#include "config.h"
 #include "util.h"
 
-size_t mg_file_size(const char *path) {
+#if MG_ENABLE_FS
+int mg_stat(const char *path, mg_stat_t *st) {
+#ifdef _WIN32
+  wchar_t tmp[MG_PATH_MAX];
+  MultiByteToWideChar(CP_UTF8, 0, path, -1, tmp, sizeof(tmp) / sizeof(tmp[0]));
+  return _wstati64(tmp, st);
+#else
+  return stat(path, st);
+#endif
+}
+
+FILE *mg_fopen(const char *path, const char *mode) {
+#ifdef _WIN32
+  wchar_t b1[MG_PATH_MAX], b2[10];
+  MultiByteToWideChar(CP_UTF8, 0, path, -1, b1, sizeof(b1) / sizeof(b1[0]));
+  MultiByteToWideChar(CP_UTF8, 0, mode, -1, b2, sizeof(b2) / sizeof(b2[0]));
+  return _wfopen(b1, b2);
+#else
+  return fopen(path, mode);
+#endif
+}
+
+int64_t mg_file_size(const char *path) {
 #if MG_ARCH == MG_ARCH_FREERTOS
   struct FF_STAT st;
   return ff_stat(path, &st) == 0 ? st.st_size : 0;
 #else
-  struct stat st;
+  mg_stat_t st;
-  return stat(path, &st) == 0 ? st.st_size : 0;
+  return mg_stat(path, &st) == 0 ? st.st_size : 0;
 #endif
 }
 
 char *mg_file_read(const char *path) {
   FILE *fp;
   char *data = NULL;
-  size_t size = mg_file_size(path);
+  size_t size = (size_t) mg_file_size(path);
-  if ((fp = fopen(path, "rb")) != NULL) {
+  if ((fp = mg_fopen(path, "rb")) != NULL) {
     data = (char *) malloc(size + 1);
     if (data != NULL) {
       if (fread(data, 1, size, fp) != size) {
@@ -29,32 +52,54 @@ char *mg_file_read(const char *path) {
   return data;
 }
 
-int mg_file_write(const char *path, const char *fmt, ...) {
+bool mg_file_write(const char *path, const void *buf, size_t len) {
-  char tmp[100];
+  bool result = false;
-  int written = 0;
   FILE *fp;
+  char tmp[MG_PATH_MAX];
   snprintf(tmp, sizeof(tmp), "%s.%d", path, rand());
-  fp = fopen(tmp, "wb");
+  fp = mg_fopen(tmp, "wb");
   if (fp != NULL) {
-    va_list ap;
+    result = fwrite(buf, 1, len, fp) == len;
-    va_start(ap, fmt);
-    written = vfprintf(fp, fmt, ap);
-    va_end(ap);
     fclose(fp);
-    remove(path);
+    if (result) {
-    rename(tmp, path);
+      remove(path);
+      rename(tmp, path);
+    } else {
+      remove(tmp);
+    }
   }
-  return written;
+  return result;
 }
 
+bool mg_file_printf(const char *path, const char *fmt, ...) {
+  char tmp[256], *buf = tmp;
+  bool result;
+  size_t len;
+  va_list ap;
+  va_start(ap, fmt);
+  len = mg_vasprintf(&buf, sizeof(tmp), fmt, ap);
+  va_end(ap);
+  result = mg_file_write(path, buf, len);
+  if (buf != tmp) free(buf);
+  return result;
+}
+#endif
+
 void mg_random(void *buf, size_t len) {
-  FILE *fp = fopen("/dev/urandom", "rb");
+  bool done = false;
-  size_t i, n = 0;
+#if MG_ENABLE_FS
-  if (fp != NULL) n = fread(buf, 1, len, fp);
+  FILE *fp = mg_fopen("/dev/urandom", "rb");
-  if (fp == NULL || n <= 0) {
+  if (fp != NULL) {
+    fread(buf, 1, len, fp);
+    fclose(fp);
+    done = true;
+  }
+#endif
+  if (!done) {
+    // Fallback to a pseudo random gen
+    size_t i;
     for (i = 0; i < len; i++) ((unsigned char *) buf)[i] = rand() % 0xff;
   }
-  if (fp != NULL) fclose(fp);
 }
 
 bool mg_globmatch(const char *s1, int n1, const char *s2, int n2) {
@@ -107,16 +152,16 @@ uint16_t mg_ntohs(uint16_t net) {
   return ((uint16_t) data[1] << 0) | ((uint32_t) data[0] << 8);
 }
 
-char *mg_hexdump(const void *buf, int len) {
+char *mg_hexdump(const void *buf, size_t len) {
   const unsigned char *p = (const unsigned char *) buf;
-  int i, idx, n = 0, ofs = 0, dlen = len * 5 + 100;
+  size_t i, idx, n = 0, ofs = 0, dlen = len * 5 + 100;
   char ascii[17] = "", *dst = (char *) malloc(dlen);
   if (dst == NULL) return dst;
   for (i = 0; i < len; i++) {
     idx = i % 16;
     if (idx == 0) {
       if (i > 0 && dlen > n) n += snprintf(dst + n, dlen - n, "  %s\n", ascii);
-      if (dlen > n) n += snprintf(dst + n, dlen - n, "%04x ", i + ofs);
+      if (dlen > n) n += snprintf(dst + n, dlen - n, "%04x ", (int) (i + ofs));
     }
     if (dlen < n) break;
     n += snprintf(dst + n, dlen - n, " %02x", p[i]);
@@ -190,7 +235,7 @@ int mg_vasprintf(char **buf, size_t size, const char *fmt, va_list ap) {
     }
     // Microsoft version of vsnprintf() is not always null-terminated, so put
     // the terminator manually
-    (*buf)[len] = 0;
+    if (*buf != NULL) (*buf)[len] = 0;
     // LCOV_EXCL_STOP
   } else if (len >= (int) size) {
     /// Standard-compliant code path. Allocate a buffer that is large enough
@@ -215,33 +260,27 @@ int mg_asprintf(char **buf, size_t size, const char *fmt, ...) {
   return ret;
 }
 
-int64_t mg_to64(const char *s) {
+int64_t mg_to64(struct mg_str str) {
   int64_t result = 0, neg = 1;
-  while (*s && isspace((unsigned char) *s)) s++;
+  size_t i = 0;
-  if (*s == '-') neg = -1, s++;
+  while (i < str.len && (str.ptr[i] == ' ' || str.ptr[i] == '\t')) i++;
-  while (isdigit((unsigned char) *s)) {
+  if (i < str.len && str.ptr[i] == '-') neg = -1, i++;
+  while (i < str.len && str.ptr[i] >= '0' && str.ptr[i] <= '9') {
     result *= 10;
-    result += (*s - '0');
+    result += (str.ptr[i] - '0');
-    s++;
+    i++;
   }
   return result * neg;
 }
 
-bool mg_aton(const char *s, uint32_t *ip) {
+uint32_t mg_crc32(uint32_t crc, const char *buf, size_t len) {
-  uint8_t data[4] = {0, 0, 0, 0}, ok = 0;
+  int i;
-  if (s != NULL && sscanf(s, "%hhu.%hhu.%hhu.%hhu", &data[0], &data[1],
+  crc = ~crc;
-                          &data[2], &data[3]) == 4) {
+  while (len--) {
-    memcpy(ip, data, sizeof(data));
+    crc ^= *(unsigned char *) buf++;
-    ok = 1;
+    for (i = 0; i < 8; i++) crc = crc & 1 ? (crc >> 1) ^ 0xedb88320 : crc >> 1;
   }
-  return ok;
+  return ~crc;
-}
-
-char *mg_ntoa(uint32_t ipaddr, char *buf, size_t len) {
-  uint8_t p[4];
-  memcpy(p, &ipaddr, sizeof(p));
-  snprintf(buf, len, "%hhu.%hhu.%hhu.%hhu", p[0], p[1], p[2], p[3]);
-  return buf;
 }
 
 double mg_time(void) {
@@ -285,7 +324,8 @@ unsigned long mg_millis(void) {
 #elif MG_ARCH == MG_ARCH_ESP32
   return esp_timer_get_time() / 1000;
 #elif MG_ARCH == MG_ARCH_ESP8266
-  return system_get_time() / 1000;
+  // return system_get_time() / 1000;
+  return xTaskGetTickCount() * portTICK_PERIOD_MS;
 #elif MG_ARCH == MG_ARCH_FREERTOS
   return xTaskGetTickCount() * portTICK_PERIOD_MS;
 #else

src/util.h

@@ -4,26 +4,36 @@
 #include "str.h"
 
 char *mg_file_read(const char *path);
-size_t mg_file_size(const char *path);
+int64_t mg_file_size(const char *path);
-int mg_file_write(const char *path, const char *fmt, ...);
+bool mg_file_write(const char *path, const void *buf, size_t len);
+bool mg_file_printf(const char *path, const char *fmt, ...);
 void mg_random(void *buf, size_t len);
 bool mg_globmatch(const char *pattern, int plen, const char *s, int n);
 bool mg_next_comma_entry(struct mg_str *s, struct mg_str *k, struct mg_str *v);
 uint16_t mg_ntohs(uint16_t net);
 uint32_t mg_ntohl(uint32_t net);
-char *mg_hexdump(const void *buf, int len);
+uint32_t mg_crc32(uint32_t crc, const char *buf, size_t len);
+char *mg_hexdump(const void *buf, size_t len);
 char *mg_hex(const void *buf, int len, char *dst);
 void mg_unhex(const char *buf, int len, unsigned char *to);
 unsigned long mg_unhexn(const char *s, int len);
 int mg_asprintf(char **buf, size_t size, const char *fmt, ...);
 int mg_vasprintf(char **buf, size_t size, const char *fmt, va_list ap);
-int64_t mg_to64(const char *s);
+int64_t mg_to64(struct mg_str str);
-bool mg_aton(const char *s, uint32_t *ipaddr);
-char *mg_ntoa(uint32_t ipaddr, char *buf, size_t len);
 double mg_time(void);
 unsigned long mg_millis(void);
 void mg_usleep(unsigned long usecs);
 
+#if MG_ENABLE_FS
+#ifdef _WIN32
+typedef struct _stati64 mg_stat_t;
+#else
+typedef struct stat mg_stat_t;
+#endif
+int mg_stat(const char *path, mg_stat_t *);
+FILE *mg_fopen(const char *fp, const char *mode);
+#endif
+
 #define mg_htons(x) mg_ntohs(x)
 #define mg_htonl(x) mg_ntohl(x)
 
@@ -34,7 +44,7 @@ void mg_usleep(unsigned long usecs);
 #if !defined(WEAK)
 #if (defined(__GNUC__) || defined(__clang__) || \
      defined(__TI_COMPILER_VERSION__)) &&       \
-    !defined(_WIN32)
+    !defined(_WIN32) && !defined(__CYGWIN__)
 #define WEAK __attribute__((weak))
 #else
 #define WEAK

src/version.h

@@ -1,2 +1,2 @@
 #pragma once
-#define MG_VERSION "7.0"
+#define MG_VERSION "7.2"

src/ws.c

@@ -15,25 +15,27 @@ struct ws_msg {
 };
 
 static void ws_handshake(struct mg_connection *c, const char *key,
-                         size_t key_len) {
+                         size_t key_len, const char *fmt, va_list ap) {
   const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
   unsigned char sha[20], b64_sha[30];
-  // mem[256], *buf = mem;
+  char mem[128], *buf = mem;
-  // int len = 0;
+
   mg_sha1_ctx sha_ctx;
   mg_sha1_init(&sha_ctx);
   mg_sha1_update(&sha_ctx, (unsigned char *) key, key_len);
   mg_sha1_update(&sha_ctx, (unsigned char *) magic, 36);
   mg_sha1_final(sha, &sha_ctx);
   mg_base64_encode(sha, sizeof(sha), (char *) b64_sha);
+  buf[0] = '\0';
+  if (fmt != NULL) mg_vasprintf(&buf, sizeof(mem), fmt, ap);
   mg_printf(c,
             "HTTP/1.1 101 Switching Protocols\r\n"
             "Upgrade: websocket\r\n"
             "Connection: Upgrade\r\n"
-            "Sec-WebSocket-Accept: %s\r\n\r\n",
+            "Sec-WebSocket-Accept: %s\r\n"
-            b64_sha);
+            "%s\r\n",
-  // mg_send(c, buf, len);
+            b64_sha, buf);
-  // if (buf != mem) free(buf);
+  if (buf != mem) free(buf);
 }
 
 static size_t ws_process(uint8_t *buf, size_t len, struct ws_msg *msg) {
@@ -72,7 +74,7 @@ size_t mg_ws_send(struct mg_connection *c, const char *buf, size_t len,
   if (len < 126) {
     header[1] = (unsigned char) len;
     header_len = 2;
-  } else if (len < 65535) {
+  } else if (len < 65536) {
     uint16_t tmp = mg_htons((uint16_t) len);
     header[1] = 126;
     memcpy(&header[2], &tmp, sizeof(tmp));
@@ -95,7 +97,7 @@ size_t mg_ws_send(struct mg_connection *c, const char *buf, size_t len,
   }
   LOG(LL_VERBOSE_DEBUG, ("WS out: %d [%.*s]", (int) len, (int) len, buf));
   mg_send(c, buf, len);
-  if (c->is_client) {
+  if (c->is_client && c->send.buf != NULL) {
     uint8_t *p = c->send.buf + c->send.len - len;
     for (i = 0; i < len; i++) p[i] ^= mask[i & 3];
   }
@@ -113,11 +115,14 @@ static void mg_ws_cb(struct mg_connection *c, int ev, void *ev_data,
         c->is_closing = 1;  // Some just, not an HTTP request
       } else if (n > 0) {
         if (n < 15 || memcmp(c->recv.buf + 9, "101", 3) != 0) {
-          LOG(LL_ERROR, ("%p WS handshake error: %.*s", c->fd, 15, c->recv.buf));
+          LOG(LL_ERROR,
+              ("%lu WS handshake error: %.*s", c->id, 15, c->recv.buf));
           c->is_closing = 1;
         } else {
+          struct mg_http_message hm;
+          mg_http_parse((char *) c->recv.buf, c->recv.len, &hm);
           c->is_websocket = 1;
-          mg_call(c, MG_EV_WS_OPEN, NULL);
+          mg_call(c, MG_EV_WS_OPEN, &hm);
         }
         mg_iobuf_delete(&c->recv, n);
       } else {
@@ -127,24 +132,23 @@ static void mg_ws_cb(struct mg_connection *c, int ev, void *ev_data,
 
     while (ws_process(c->recv.buf, c->recv.len, &msg) > 0) {
       char *s = (char *) c->recv.buf + msg.header_len;
+      struct mg_ws_message m = {{s, msg.data_len}, msg.flags};
       switch (msg.flags & WEBSOCKET_FLAGS_MASK_OP) {
         case WEBSOCKET_OP_PING:
           LOG(LL_DEBUG, ("%s", "WS PONG"));
           mg_ws_send(c, s, msg.data_len, WEBSOCKET_OP_PONG);
+          mg_call(c, MG_EV_WS_CTL, &m);
           break;
         case WEBSOCKET_OP_PONG:
-          // Ignore
+          mg_call(c, MG_EV_WS_CTL, &m);
           break;
-        case WEBSOCKET_OP_CLOSE: {
+        case WEBSOCKET_OP_CLOSE:
-          struct mg_ws_message evd = {{s, msg.data_len}, msg.flags};
+          LOG(LL_ERROR, ("%lu Got WS CLOSE", c->id));
-          LOG(LL_ERROR, ("%p Got WS CLOSE", c->fd));
+          mg_call(c, MG_EV_WS_CTL, &m);
-          mg_call(c, MG_EV_WS_MSG, &evd);
           c->is_closing = 1;
           return;
-        }
         default: {
-          struct mg_ws_message evd = {{s, msg.data_len}, msg.flags};
+          mg_call(c, MG_EV_WS_MSG, &m);
-          mg_call(c, MG_EV_WS_MSG, &evd);
           break;
         }
       }
@@ -193,9 +197,15 @@ struct mg_connection *mg_ws_connect(struct mg_mgr *mgr, const char *url,
   return c;
 }
 
-void mg_ws_upgrade(struct mg_connection *c, struct mg_http_message *hm) {
+void mg_ws_upgrade(struct mg_connection *c, struct mg_http_message *hm,
+                   const char *fmt, ...) {
   struct mg_str *wskey = mg_http_get_header(hm, "Sec-WebSocket-Key");
   c->pfn = mg_ws_cb;
-  if (wskey != NULL) ws_handshake(c, wskey->ptr, wskey->len);
+  if (wskey != NULL) {
+    va_list ap;
+    va_start(ap, fmt);
+    ws_handshake(c, wskey->ptr, wskey->len, fmt, ap);
+    va_end(ap);
+  }
   c->is_websocket = 1;
 }

src/ws.h

@@ -20,5 +20,6 @@ struct mg_ws_message {
 struct mg_connection *mg_ws_connect(struct mg_mgr *, const char *url,
                                     mg_event_handler_t fn, void *fn_data,
                                     const char *fmt, ...);
-void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *);
+void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *,
+                   const char *fmt, ...);
 size_t mg_ws_send(struct mg_connection *, const char *buf, size_t len, int op);