113 lines
3.7 KiB
C
113 lines
3.7 KiB
C
// Copyright (c) 2022 Cesanta Software Limited
|
|
// All rights reserved
|
|
|
|
#include "mongoose.h"
|
|
|
|
static const char *s_lsn = "tcp://localhost:8765"; // Listening address
|
|
static const char *s_conn = "tcp://localhost:8765"; // Connect to address
|
|
|
|
// client resources
|
|
static struct c_res_s {
|
|
int i;
|
|
struct mg_connection *c;
|
|
} c_res;
|
|
|
|
// CLIENT event handler
|
|
static void cfn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
|
|
int *i = &((struct c_res_s *) fn_data)->i;
|
|
if (ev == MG_EV_OPEN) {
|
|
MG_INFO(("CLIENT has been initialized"));
|
|
} else if (ev == MG_EV_CONNECT) {
|
|
MG_INFO(("CLIENT connected"));
|
|
#if MG_ENABLE_MBEDTLS || MG_ENABLE_OPENSSL
|
|
struct mg_tls_opts opts = {.ca = "ss_ca.pem"};
|
|
mg_tls_init(c, &opts);
|
|
MG_INFO(("CLIENT initialized TLS"));
|
|
#endif
|
|
*i = 1; // do something
|
|
} else if (ev == MG_EV_READ) {
|
|
struct mg_iobuf *r = &c->recv;
|
|
MG_INFO(("CLIENT got data: %.*s", r->len, r->buf));
|
|
r->len = 0; // Tell Mongoose we've consumed data
|
|
} else if (ev == MG_EV_CLOSE) {
|
|
MG_INFO(("CLIENT disconnected"));
|
|
// signal we are done
|
|
((struct c_res_s *) fn_data)->c = NULL;
|
|
} else if (ev == MG_EV_ERROR) {
|
|
MG_INFO(("CLIENT error: %s", (char *) ev_data));
|
|
} else if (ev == MG_EV_POLL && *i != 0) {
|
|
switch ((*i)++) {
|
|
case 50: // 50 x 100ms = 5s
|
|
mg_send(c, "Hi, there", 9);
|
|
MG_INFO(("CLIENT sent data"));
|
|
break;
|
|
case 100: // another 5s
|
|
// send any possible outstanding data and close the connection
|
|
c->is_draining = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// SERVER event handler
|
|
static void sfn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
|
|
if (ev == MG_EV_OPEN && c->is_listening == 1) {
|
|
MG_INFO(("SERVER is listening"));
|
|
} else if (ev == MG_EV_ACCEPT) {
|
|
MG_INFO(("SERVER accepted a connection"));
|
|
#if MG_ENABLE_MBEDTLS || MG_ENABLE_OPENSSL
|
|
struct mg_tls_opts opts = {
|
|
//.ca = "ss_ca.pem", // Uncomment to enable two-way SSL
|
|
.cert = "ss_server.pem", // Certificate PEM file
|
|
.certkey = "ss_server.pem", // This pem contains both cert and key
|
|
};
|
|
mg_tls_init(c, &opts);
|
|
MG_INFO(("SERVER initialized TLS"));
|
|
#endif
|
|
} else if (ev == MG_EV_READ) {
|
|
struct mg_iobuf *r = &c->recv;
|
|
MG_INFO(("SERVER got data: %.*s", r->len, r->buf));
|
|
mg_send(c, r->buf, r->len); // echo it back
|
|
r->len = 0; // Tell Mongoose we've consumed data
|
|
} else if (ev == MG_EV_CLOSE) {
|
|
MG_INFO(("SERVER disconnected"));
|
|
} else if (ev == MG_EV_ERROR) {
|
|
MG_INFO(("SERVER error: %s", (char *) ev_data));
|
|
}
|
|
(void) fn_data;
|
|
}
|
|
|
|
// Timer function - recreate client connection if it is closed
|
|
static void timer_fn(void *arg) {
|
|
struct mg_mgr *mgr = (struct mg_mgr *) arg;
|
|
if (c_res.c == NULL) {
|
|
// connect
|
|
c_res.i = 0;
|
|
c_res.c = mg_connect(mgr, s_conn, cfn, &c_res);
|
|
if (c_res.c == NULL)
|
|
MG_INFO(("CLIENT cant' open a connection"));
|
|
else
|
|
MG_INFO(("CLIENT is connecting"));
|
|
}
|
|
}
|
|
|
|
int main(void) {
|
|
struct mg_mgr mgr; // Event manager
|
|
struct mg_connection *c;
|
|
|
|
mg_log_set(MG_LL_INFO); // Set log level
|
|
mg_mgr_init(&mgr); // Initialize event manager
|
|
mg_timer_add(&mgr, 15000, MG_TIMER_REPEAT | MG_TIMER_RUN_NOW, timer_fn,
|
|
&mgr); // Init timer for demo purposes, 15s
|
|
c = mg_listen(&mgr, s_lsn, sfn, NULL); // Create server connection
|
|
if (c == NULL) {
|
|
MG_INFO(("SERVER cant' open a connection"));
|
|
return 0;
|
|
}
|
|
while (true)
|
|
mg_mgr_poll(&mgr, 100); // Infinite event loop, blocks for upto 100ms
|
|
// unless there is network activity
|
|
mg_mgr_free(&mgr); // Free resources
|
|
return 0;
|
|
}
|