int main(int argc, char* argv[])
{
coap_context_t* ctx;
coap_address_t serv_addr;
coap_resource_t* hello_resource;
fd_set readfds;
/* Prepare the CoAP server socket */
coap_address_init(&serv_addr);
serv_addr.addr.sin.sin_family = AF_INET;
serv_addr.addr.sin.sin_addr.s_addr = INADDR_ANY;
serv_addr.addr.sin.sin_port = htons(5683); //default port
ctx = coap_new_context(&serv_addr);
if (!ctx) exit(EXIT_FAILURE);
/* Initialize the hello resource */
hello_resource = coap_resource_init((unsigned char *)"hello", 5, 0);
coap_register_handler(hello_resource, COAP_REQUEST_GET, hello_async_handler);
coap_add_resource(ctx, hello_resource);
/*Listen for incoming connections*/
while (1) {
FD_ZERO(&readfds);
FD_SET( ctx->sockfd, &readfds );
int result = select( FD_SETSIZE, &readfds, 0, 0, NULL );
if ( result < 0 ) /* socket error */
{
exit(EXIT_FAILURE);
}
else if ( result > 0 && FD_ISSET( ctx->sockfd, &readfds )) /* socket read*/
{
coap_read( ctx );
}
sleep(2);
if(async)
send_async_response(ctx, ctx->endpoint);
}
}
void CoAPContext::initialize(const coap_address_t& listen_addr)
{
ctx = coap_new_context(&listen_addr);
if (ctx == 0) {
// Failed to allocate a new context struct
throw std::bad_alloc();
}
// Set up Boost socket object
socket.assign(boost::asio::ip::udp::v6(), ctx->sockfd);
// Put the socket into non-blocking mode.
socket.non_blocking(true);
// Enqueue an asynchronous socket read
perform_operations();
}
static coap_session_t *
get_session(const char *group) {
coap_context_t *ctx = coap_new_context(NULL);
int s;
struct addrinfo hints;
struct addrinfo *result, *rp;
coap_session_t *session;
int hops = 16;
if (!ctx)
return NULL;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC; /* Allow IPv4 or IPv6 */
hints.ai_socktype = SOCK_DGRAM; /* Coap uses UDP */
hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST | AI_NUMERICSERV | AI_ALL;
s = getaddrinfo(group, NULL, &hints, &result);
if ( s != 0 ) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(s));
return NULL;
}
/* iterate through results until success */
for (rp = result; rp != NULL; rp = rp->ai_next) {
coap_address_t addr;
coap_address_init(&addr);
addr.size = rp->ai_addrlen;
memcpy(&addr.addr, rp->ai_addr, rp->ai_addrlen);
session = coap_new_client_session(ctx, NULL, &addr, COAP_PROTO_UDP);
if (!session)
continue;
if (IN6_IS_ADDR_MULTICAST(&addr.addr.sin6.sin6_addr) ) {
/* set socket options for multicast */
if ( setsockopt(session->sock.fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
(char *)&hops, sizeof(hops) ) < 0 )
perror("setsockopt: IPV6_MULTICAST_HOPS");
}
freeaddrinfo(result);
return session;
}
fprintf(stderr, "no session available for group '%s'\n", group);
freeaddrinfo(result);
return NULL;
}
coap_context_t *get_context(void) {
struct sockaddr_in6 server_addr;
coap_context_t *ctx = NULL;
server_addr.sin6_family = AF_INET6;
memset(&server_addr.sin6_addr, 0, sizeof(server_addr.sin6_addr));
coap_address_t addr;
coap_address_init(&addr);
addr.size = sizeof(server_addr.sin6_addr);
memcpy(&addr.addr, &(server_addr.sin6_addr), addr.size);
ctx = coap_new_context(&addr);
return ctx;
}
coap_context_t *
get_context(const char *node, const char *port) {
coap_context_t *ctx = NULL;
int s;
struct addrinfo hints;
struct addrinfo *result, *rp;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC; /* Allow IPv4 or IPv6 */
hints.ai_socktype = SOCK_DGRAM; /* Coap uses UDP */
hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
s = getaddrinfo(node, port, &hints, &result);
if ( s != 0 ) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(s));
return NULL;
}
/* iterate through results until success */
for (rp = result; rp != NULL; rp = rp->ai_next) {
coap_address_t addr;
if (rp->ai_addrlen <= sizeof(addr.addr)) {
coap_address_init(&addr);
addr.size = rp->ai_addrlen;
memcpy(&addr.addr, rp->ai_addr, rp->ai_addrlen);
ctx = coap_new_context(&addr);
if (ctx) {
/* TODO: output address:port for successful binding */
goto finish;
}
}
}
fprintf(stderr, "no context available for interface '%s'\n", node);
finish:
freeaddrinfo(result);
return ctx;
}
static void coap_example_thread(void *p)
{
coap_context_t *ctx = NULL;
coap_address_t serv_addr;
coap_resource_t *resource = NULL;
snprintf(espressif_data, sizeof(espressif_data), "no data");
espressif_data_len = strlen(espressif_data);
coap_set_log_level(COAP_LOGGING_LEVEL);
while (1) {
coap_endpoint_t *ep_udp = NULL;
coap_endpoint_t *ep_tcp = NULL;
unsigned wait_ms;
/* Wait for the callback to set the CONNECTED_BIT in the
event group.
*/
xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT,
false, true, portMAX_DELAY);
ESP_LOGI(TAG, "Connected to AP");
/* Prepare the CoAP server socket */
coap_address_init(&serv_addr);
serv_addr.addr.sin.sin_family = AF_INET;
serv_addr.addr.sin.sin_addr.s_addr = INADDR_ANY;
serv_addr.addr.sin.sin_port = htons(COAP_DEFAULT_PORT);
ctx = coap_new_context(NULL);
if (!ctx) {
continue;
}
ep_udp = coap_new_endpoint(ctx, &serv_addr, COAP_PROTO_UDP);
if (!ep_udp) {
goto clean_up;
}
ep_tcp = coap_new_endpoint(ctx, &serv_addr, COAP_PROTO_TCP);
if (!ep_tcp) {
goto clean_up;
}
resource = coap_resource_init(coap_make_str_const("Espressif"), 0);
if (!resource) {
goto clean_up;
}
coap_register_handler(resource, COAP_REQUEST_GET, hnd_espressif_get);
coap_register_handler(resource, COAP_REQUEST_PUT, hnd_espressif_put);
coap_register_handler(resource, COAP_REQUEST_DELETE, hnd_espressif_delete);
/* We possibly want to Observe the GETs */
coap_resource_set_get_observable(resource, 1);
coap_add_resource(ctx, resource);
wait_ms = COAP_RESOURCE_CHECK_TIME * 1000;
while (1) {
int result = coap_run_once(ctx, wait_ms);
if (result < 0) {
break;
} else if (result && (unsigned)result < wait_ms) {
/* decrement if there is a result wait time returned */
wait_ms -= result;
}
if (result) {
/* result must have been >= wait_ms, so reset wait_ms */
wait_ms = COAP_RESOURCE_CHECK_TIME * 1000;
}
}
}
clean_up:
coap_free_context(ctx);
coap_cleanup();
vTaskDelete(NULL);
}
