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move to new skeleton
This commit is contained in:
Sergio R. Caprile
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PROG ?= example # Program we are building
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DELETE = rm -rf # Command to remove files
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OUT ?= -o $(PROG) # Compiler argument for output file
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SOURCES = main.c mongoose.c # Source code files
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CFLAGS = -W -Wall -Wextra -g -I. # Build options
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# Mongoose build options. See https://mongoose.ws/documentation/#build-options
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CFLAGS_MONGOOSE += -DMG_IO_SIZE=8192 -DMG_ENABLE_LINES
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ifeq ($(OS),Windows_NT) # Windows settings. Assume MinGW compiler. To use VC: make CC=cl CFLAGS=/MD OUT=/Feprog.exe
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PROG ?= example.exe # Use .exe suffix for the binary
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CC = gcc # Use MinGW gcc compiler
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CFLAGS += -lws2_32 # Link against Winsock library
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DELETE = cmd /C del /Q /F /S # Command prompt command to delete files
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OUT ?= -o $(PROG) # Build output
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endif
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all: $(PROG) # Default target. Build and run program
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$(RUN) ./$(PROG) $(ARGS)
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$(PROG): $(SOURCES) # Build program from sources
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$(CC) $(SOURCES) $(CFLAGS) $(CFLAGS_MONGOOSE) $(CFLAGS_EXTRA) $(OUT)
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clean: # Cleanup. Delete built program and all build artifacts
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$(DELETE) $(PROG) *.o *.obj *.exe *.dSYM
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See detailed tutorial at https://mongoose.ws/tutorials/udp/captive-dns-server/
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// Copyright (c) 2020 Cesanta Software Limited
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// All rights reserved
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//
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// Example captive DNS server (captive portal).
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// 1. Run `make`. This builds and starts a server on port 5533
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// 2. Run `dig -t A www.google.com -4 @localhost -p 5533`
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#include "mongoose.h"
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static const char *s_listen_url = "udp://0.0.0.0:5533";
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// DNS answer section. We response with IP 1.2.3.4 - you can change it
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// in the last 4 bytes of this array
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uint8_t answer[] = {
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0xc0, 0x0c, // Point to the name in the DNS question
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0, 1, // 2 bytes - record type, A
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0, 1, // 2 bytes - address class, INET
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0, 0, 0, 120, // 4 bytes - TTL
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0, 4, // 2 bytes - address length
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1, 2, 3, 4 // 4 bytes - IP address
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};
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static void fn(struct mg_connection *c, int ev, void *ev_data) {
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if (ev == MG_EV_OPEN) {
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c->is_hexdumping = 1;
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} else if (ev == MG_EV_READ) {
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struct mg_dns_rr rr; // Parse first question, offset 12 is header size
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size_t n = mg_dns_parse_rr(c->recv.buf, c->recv.len, 12, true, &rr);
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MG_INFO(("DNS request parsed, result=%d", (int) n));
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if (n > 0) {
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char buf[512];
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struct mg_dns_header *h = (struct mg_dns_header *) buf;
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memset(buf, 0, sizeof(buf)); // Clear the whole datagram
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h->txnid = ((struct mg_dns_header *) c->recv.buf)->txnid; // Copy tnxid
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h->num_questions = mg_htons(1); // We use only the 1st question
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h->num_answers = mg_htons(1); // And only one answer
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h->flags = mg_htons(0x8400); // Authoritative response
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memcpy(buf + sizeof(*h), c->recv.buf + sizeof(*h), n); // Copy question
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memcpy(buf + sizeof(*h) + n, answer, sizeof(answer)); // And answer
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mg_send(c, buf, 12 + n + sizeof(answer)); // And send it!
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}
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mg_iobuf_del(&c->recv, 0, c->recv.len);
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}
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(void) ev_data;
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}
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int main(void) {
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struct mg_mgr mgr;
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mg_log_set(MG_LL_DEBUG); // Set log level
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mg_mgr_init(&mgr); // Initialise event manager
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mg_listen(&mgr, s_listen_url, fn, NULL); // Start DNS server
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for (;;) mg_mgr_poll(&mgr, 1000); // Event loop
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mg_mgr_free(&mgr);
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return 0;
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}
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../../../mongoose.c
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../../../mongoose.h
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PROG ?= example # Program we are building
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DELETE = rm -rf # Command to remove files
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OUT ?= -o $(PROG) # Compiler argument for output file
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SOURCES = main.c mongoose.c # Source code files
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CFLAGS = -W -Wall -Wextra -g -I. # Build options
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# Mongoose build options. See https://mongoose.ws/documentation/#build-options
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CFLAGS_MONGOOSE += -DMG_ENABLE_LINES
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ifeq ($(OS),Windows_NT) # Windows settings. Assume MinGW compiler. To use VC: make CC=cl CFLAGS=/MD OUT=/Feprog.exe
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PROG ?= example.exe # Use .exe suffix for the binary
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CC = gcc # Use MinGW gcc compiler
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CFLAGS += -lws2_32 # Link against Winsock library
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DELETE = cmd /C del /Q /F /S # Command prompt command to delete files
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OUT ?= -o $(PROG) # Build output
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endif
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all: $(PROG) # Default target. Build and run program
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$(RUN) ./$(PROG) $(ARGS)
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$(PROG): $(SOURCES) # Build program from sources
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$(CC) $(SOURCES) $(CFLAGS) $(CFLAGS_MONGOOSE) $(CFLAGS_EXTRA) $(OUT)
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clean: # Cleanup. Delete built program and all build artifacts
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$(DELETE) $(PROG) *.o *.obj *.exe *.dSYM
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See detailed tutorial at https://mongoose.ws/tutorials/udp/sntp-time-sync/
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// Copyright (c) 2022 Cesanta Software Limited
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// All rights reserved
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//
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// Synchronize time with remote SNTP server
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// A working time() call is required by TLS, so an embedded device without
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// a clock that wants to use TLS, must sync time via SNTP.
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#include "mongoose.h"
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// The UNIX epoch of the boot time. Initially, we set it to 0. But then after
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// SNTP response, we update it to the correct value, which will allow us to
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// use time(). Uptime in milliseconds is returned by mg_millis().
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static time_t s_boot_timestamp = 0;
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// SNTP client connection
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static struct mg_connection *s_sntp_conn = NULL;
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// On embedded systems, rename to time()
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time_t my_time(time_t *tp) {
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time_t t = s_boot_timestamp + mg_millis() / 1000;
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if (tp != NULL) *tp = t;
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return t;
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}
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// SNTP client callback
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static void sfn(struct mg_connection *c, int ev, void *ev_data) {
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if (ev == MG_EV_SNTP_TIME) {
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int64_t t = *(int64_t *) ev_data;
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MG_INFO(("Got SNTP time: %lld ms from epoch", t));
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s_boot_timestamp = (time_t) ((t - mg_millis()) / 1000);
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} else if (ev == MG_EV_CLOSE) {
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s_sntp_conn = NULL;
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}
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(void) c;
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}
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// Called every 5 seconds. Increase that for production case.
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static void timer_fn(void *arg) {
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struct mg_mgr *mgr = (struct mg_mgr *) arg;
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if (s_sntp_conn == NULL) s_sntp_conn = mg_sntp_connect(mgr, NULL, sfn, NULL);
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if (s_sntp_conn != NULL) mg_sntp_request(s_sntp_conn);
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}
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int main(void) {
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struct mg_mgr mgr; // Event manager
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mg_mgr_init(&mgr); // Initialise event manager
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mg_log_set(MG_LL_DEBUG); // Set log level
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mg_timer_add(&mgr, 5000, MG_TIMER_REPEAT | MG_TIMER_RUN_NOW, timer_fn, &mgr);
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for (;;) mg_mgr_poll(&mgr, 300); // Infinite event loop
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mg_mgr_free(&mgr); // Free manager resources
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return 0;
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}
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+1
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../../../mongoose.c
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+1
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../../../mongoose.h
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@@ -0,0 +1,25 @@
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PROG ?= example # Program we are building
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DELETE = rm -rf # Command to remove files
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OUT ?= -o $(PROG) # Compiler argument for output file
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SOURCES = main.c mongoose.c # Source code files
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CFLAGS = -W -Wall -Wextra -g -I. # Build options
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# Mongoose build options. See https://mongoose.ws/documentation/#build-options
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#CFLAGS_MONGOOSE += -DMG_ENABLE_LINES
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ifeq ($(OS),Windows_NT) # Windows settings. Assume MinGW compiler. To use VC: make CC=cl CFLAGS=/MD OUT=/Feprog.exe
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PROG ?= example.exe # Use .exe suffix for the binary
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CC = gcc # Use MinGW gcc compiler
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CFLAGS += -lws2_32 # Link against Winsock library
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DELETE = cmd /C del /Q /F /S # Command prompt command to delete files
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OUT ?= -o $(PROG) # Build output
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endif
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all: $(PROG) # Default target. Build and run program
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$(RUN) ./$(PROG) $(ARGS)
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$(PROG): $(SOURCES) # Build program from sources
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$(CC) $(SOURCES) $(CFLAGS) $(CFLAGS_MONGOOSE) $(CFLAGS_EXTRA) $(OUT)
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clean: # Cleanup. Delete built program and all build artifacts
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$(DELETE) $(PROG) *.o *.obj *.exe *.dSYM
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@@ -0,0 +1 @@
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See detailed tutorial at https://mongoose.ws/tutorials/udp/ssdp-search/
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// Copyright (c) 2022 Cesanta Software Limited
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// All rights reserved
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#include "mongoose.h"
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static const char *s_ssdp_url = "udp://239.255.255.250:1900";
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static void fn(struct mg_connection *c, int ev, void *ev_data) {
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MG_DEBUG(("%p got event: %d %p", c, ev, ev_data));
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if (ev == MG_EV_OPEN) {
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// c->is_hexdumping = 1;
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} else if (ev == MG_EV_RESOLVE) {
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// c->rem gets populated with multicast address. Store it in c->data
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memcpy(c->data, &c->rem, sizeof(c->rem));
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} else if (ev == MG_EV_READ) {
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MG_INFO(("Got a response"));
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struct mg_http_message hm;
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if (mg_http_parse((const char *) c->recv.buf, c->recv.len, &hm) > 0) {
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size_t i, max = sizeof(hm.headers) / sizeof(hm.headers[0]);
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// Iterate over request headers
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for (i = 0; i < max && hm.headers[i].name.len > 0; i++) {
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struct mg_str *k = &hm.headers[i].name, *v = &hm.headers[i].value;
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if ((mg_vcasecmp(k, "SERVER") == 0) ||
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(mg_vcasecmp(k, "LOCATION") == 0)) {
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printf("\t%.*s -> %.*s\n", (int) k->len, k->buf, (int) v->len,
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v->buf);
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}
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}
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printf("\n");
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}
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// Each response to the SSDP socket will change c->rem.
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// We can now do mg_printf(c, "haha"); to respond back to the remote side.
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// But in our case, we should restore the multicast address in order
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// to have next search to go to the multicast address
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memcpy(&c->rem, c->data, sizeof(c->rem));
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// Discard the content of this response as we expect each SSDP response
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// to generate at most one MG_EV_READ event.
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c->recv.len = 0UL;
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}
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}
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static void tfn(void *param) {
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struct mg_connection *c = param;
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if (c == NULL) return;
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MG_INFO(("Sending M-SEARCH"));
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mg_printf(c, "%s",
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"M-SEARCH * HTTP/1.1\r\n"
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"HOST: 239.255.255.250:1900\r\n"
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"MAN: \"ssdp:discover\"\r\n"
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"ST: urn:schemas-upnp-org:device:MediaRenderer:1\r\n"
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"MX: 5\r\n"
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"\r\n");
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}
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int main(void) {
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struct mg_mgr mgr;
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static struct mg_connection *c;
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mg_mgr_init(&mgr);
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c = mg_connect(&mgr, s_ssdp_url, fn, NULL);
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mg_timer_add(&mgr, 2000, MG_TIMER_REPEAT | MG_TIMER_RUN_NOW, tfn, c);
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while (true) mg_mgr_poll(&mgr, 200);
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mg_mgr_free(&mgr);
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return 0;
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}
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+1
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../../../mongoose.c
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+1
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../../../mongoose.h
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