Make TURN REST API timeout configurable in janus.jcfg (meetecho#2470)

conf/janus.jcfg.sample.in

@@ -294,12 +294,15 @@ nat: {
 	# which is currently available in both rfc5766-turn-server and coturn.
 	# You enable this by specifying the address of your TURN REST API backend,
 	# the HTTP method to use (GET or POST) and, if required, the API key Janus
-	# must provide. Notice that the 'opaque_id' provided via Janus API will be
-	# used as the username for a specific PeerConnection by default; if that one
-	# is missing, the 'session_id' will be used as the username instead.
+	# must provide. The timeout can be configured in seconds, with a default of
+	# 10 seconds and a minimum of 1 second. Notice that the 'opaque_id' provided
+	# via Janus API will be used as the username for a specific PeerConnection
+	# by default; if that one is missing, the 'session_id' will be used as the
+	# username instead.
 	#turn_rest_api = "http://yourbackend.com/path/to/api"
 	#turn_rest_api_key = "anyapikeyyoumayhaveset"
 	#turn_rest_api_method = "GET"
+	#turn_rest_api_timeout = 10
 
 	# You can also choose which interfaces should be explicitly used by the
 	# gateway for the purpose of ICE candidates gathering, thus excluding

ice.c

@@ -1125,7 +1125,7 @@ int janus_ice_set_turn_server(gchar *turn_server, uint16_t turn_port, gchar *tur
 	return 0;
 }
 
-int janus_ice_set_turn_rest_api(gchar *api_server, gchar *api_key, gchar *api_method) {
+int janus_ice_set_turn_rest_api(gchar *api_server, gchar *api_key, gchar *api_method, uint api_timeout) {
 #ifndef HAVE_TURNRESTAPI
 	JANUS_LOG(LOG_ERR, "Janus has been built with no libcurl support, TURN REST API unavailable\n");
 	return -1;
@@ -1135,7 +1135,7 @@ int janus_ice_set_turn_rest_api(gchar *api_server, gchar *api_key, gchar *api_me
 		JANUS_LOG(LOG_ERR, "Invalid TURN REST API backend: not an HTTP address\n");
 		return -1;
 	}
-	janus_turnrest_set_backend(api_server, api_key, api_method);
+	janus_turnrest_set_backend(api_server, api_key, api_method, api_timeout);
 	JANUS_LOG(LOG_INFO, "TURN REST API backend: %s\n", api_server ? api_server : "(disabled)");
 #endif
 	return 0;

ice.h

@@ -70,8 +70,9 @@ int janus_ice_set_turn_server(gchar *turn_server, uint16_t turn_port, gchar *tur
  * @param[in] api_server TURN REST API backend (NULL to disable the API)
  * @param[in] api_key API key to use, if required
  * @param[in] api_method HTTP method to use (POST by default)
+ * @param[in] api_timeout total timeout for HTTP method in seconds
  * @returns 0 in case of success, a negative integer on errors */
-int janus_ice_set_turn_rest_api(gchar *api_server, gchar *api_key, gchar *api_method);
+int janus_ice_set_turn_rest_api(gchar *api_server, gchar *api_key, gchar *api_method, uint api_timeout);
 /*! \brief Method to get the STUN server IP address
  * @returns The currently used STUN server IP address, if available, or NULL if not */
 char *janus_ice_get_stun_server(void);

janus.c

@@ -4643,6 +4643,7 @@ gint main(int argc, char *argv[])
 	char *turn_rest_api = NULL, *turn_rest_api_key = NULL;
 #ifdef HAVE_TURNRESTAPI
 	char *turn_rest_api_method = NULL;
+	uint turn_rest_api_timeout = 10;
 #endif
 	uint16_t rtp_min_port = 0, rtp_max_port = 0;
 	gboolean ice_lite = FALSE, ice_tcp = FALSE, full_trickle = FALSE, ipv6 = FALSE,
@@ -4757,6 +4758,15 @@ gint main(int argc, char *argv[])
 	item = janus_config_get(config, config_nat, janus_config_type_item, "turn_rest_api_method");
 	if(item && item->value)
 		turn_rest_api_method = (char *)item->value;
+	item = janus_config_get(config, config_nat, janus_config_type_item, "turn_rest_api_timeout");
+	if(item && item->value) {
+		int rst = atoi(item->value);
+		if(rst <= 0) { /* Don't allow user to set 0 seconds i.e., infinite wait */
+			JANUS_LOG(LOG_WARN, "Ignoring turn_rest_api_timeout as it's not a positive integer, leaving at default (10 seconds)\n");
+		} else {
+			turn_rest_api_timeout = rst;
+		}
+	}
 #endif
 	/* Do we need a limited number of static event loops, or is it ok to have one per handle (the default)? */
 	item = janus_config_get(config, config_general, janus_config_type_item, "event_loops");
@@ -4785,7 +4795,7 @@ gint main(int argc, char *argv[])
 		JANUS_LOG(LOG_WARN, "A TURN REST API backend specified in the settings, but libcurl support has not been built\n");
 	}
 #else
-	if(janus_ice_set_turn_rest_api(turn_rest_api, turn_rest_api_key, turn_rest_api_method) < 0) {
+	if(janus_ice_set_turn_rest_api(turn_rest_api, turn_rest_api_key, turn_rest_api_method, turn_rest_api_timeout) < 0) {
 		JANUS_LOG(LOG_FATAL, "Invalid TURN REST API configuration: %s (%s, %s)\n", turn_rest_api, turn_rest_api_key, turn_rest_api_method);
 		exit(1);
 	}

turnrest.c

@@ -31,6 +31,7 @@
 static const char *api_server = NULL;
 static const char *api_key = NULL;
 static gboolean api_http_get = FALSE;
+static uint api_timeout;
 static janus_mutex api_mutex = JANUS_MUTEX_INITIALIZER;
 
 
@@ -69,7 +70,7 @@ void janus_turnrest_deinit(void) {
 	janus_mutex_unlock(&api_mutex);
 }
 
-void janus_turnrest_set_backend(const char *server, const char *key, const char *method) {
+void janus_turnrest_set_backend(const char *server, const char *key, const char *method, const uint timeout) {
 	janus_mutex_lock(&api_mutex);
 
 	/* Get rid of the old values first */
@@ -93,6 +94,7 @@ void janus_turnrest_set_backend(const char *server, const char *key, const char
 				api_http_get = FALSE;
 			}
 		}
+		api_timeout = timeout;
 	}
 	janus_mutex_unlock(&api_mutex);
 }
@@ -163,7 +165,7 @@ janus_turnrest_response *janus_turnrest_request(const char *user) {
 		/* FIXME Some servers don't like a POST with no data */
 		curl_easy_setopt(curl, CURLOPT_POSTFIELDS, query_string);
 	}
-	curl_easy_setopt(curl, CURLOPT_TIMEOUT, 10L);	/* FIXME Max 10 seconds */
+	curl_easy_setopt(curl, CURLOPT_TIMEOUT, api_timeout);
 	/* For getting data, we use an helper struct and the libcurl callback */
 	janus_turnrest_buffer data;
 	data.buffer = g_malloc0(1);

turnrest.h

@@ -31,8 +31,9 @@ void janus_turnrest_deinit(void);
  * @param server The REST API server address (pass NULL to disable the
  * TURN REST API entirely)
  * @param key The API key, if any (pass NULL if it's not required)
- * @param method The HTTP method to use, POST or GET (NULL means POST) */
-void janus_turnrest_set_backend(const char *server, const char *key, const char *method);
+ * @param method The HTTP method to use, POST or GET (NULL means POST)
+ * @param timeout The timeout in seconds */
+void janus_turnrest_set_backend(const char *server, const char *key, const char *method, const uint timeout);
 /*! \brief Get the currently set TURN REST API backend
  * @returns The currently set TURN REST API backend */
 const char *janus_turnrest_get_backend(void);