default to 30s timeout for librtmp

@@ -53,6 +53,9 @@ using namespace std;
 ISrsLog* _srs_log = new ISrsLog();
 ISrsThreadContext* _srs_context = new ISrsThreadContext();
 
+// use this default timeout in us, if user not set.
+#define SRS_SOCKET_DEFAULT_TIMEOUT 30 * 1000 * 1000LL
+
 /**
 * export runtime context.
 */
@@ -104,6 +107,10 @@ struct Context
     // the aac sequence header.
     std::string aac_specific_config;
     
+    // user set timeout, in us.
+    int64_t stimeout;
+    int64_t rtimeout;
+    
     Context() {
         rtmp = NULL;
         skt = NULL;
@@ -112,6 +119,7 @@ struct Context
         h264_sps_pps_sent = false;
         h264_sps_changed = false;
         h264_pps_changed = false;
+        rtimeout = stimeout = -1;
     }
     virtual ~Context() {
         srs_freep(req);
@@ -577,9 +585,12 @@ int srs_rtmp_set_timeout(srs_rtmp_t rtmp, int recv_timeout_ms, int send_timeout_
     }
 
     Context* context = (Context*)rtmp;
+    
+    context->stimeout = send_timeout_ms * 1000;
+    context->rtimeout = recv_timeout_ms * 1000;
 
-    context->skt->set_recv_timeout(recv_timeout_ms * 1000LL);
-    context->skt->set_send_timeout(send_timeout_ms * 1000LL);
+    context->skt->set_recv_timeout(context->rtimeout);
+    context->skt->set_send_timeout(context->stimeout);
 
     return ret;
 }
@@ -640,6 +651,16 @@ int srs_rtmp_connect_server(srs_rtmp_t rtmp)
     srs_assert(rtmp != NULL);
     Context* context = (Context*)rtmp;
     
+    // set timeout if user not set.
+    if (context->stimeout == -1) {
+        context->stimeout = SRS_SOCKET_DEFAULT_TIMEOUT;
+        context->skt->set_send_timeout(context->stimeout);
+    }
+    if (context->rtimeout == -1) {
+        context->rtimeout = SRS_SOCKET_DEFAULT_TIMEOUT;
+        context->skt->set_recv_timeout(context->rtimeout);
+    }
+    
     if ((ret = srs_librtmp_context_connect(context)) != ERROR_SUCCESS) {
         return ret;
     }

@@ -88,29 +88,34 @@ extern int srs_version_revision();
 // the RTMP handler.
 typedef void* srs_rtmp_t;
 typedef void* srs_amf0_t;
-
+    
 /**
-* create/destroy a rtmp protocol stack.
-* @url rtmp url, for example: 
-*         rtmp://localhost/live/livestream
-*
-* @return a rtmp handler, or NULL if error occured.
-*/
+ * create/destroy a rtmp protocol stack.
+ * @url rtmp url, for example:
+ *         rtmp://localhost/live/livestream
+ * @remark default timeout to 30s if not set by srs_rtmp_set_timeout.
+ *
+ * @return a rtmp handler, or NULL if error occured.
+ */
 extern srs_rtmp_t srs_rtmp_create(const char* url);
 /**
-* create rtmp with url, used for connection specified application.
-* @param url the tcUrl, for exmple:
-*         rtmp://localhost/live
-* @remark this is used to create application connection-oriented,
-*       for example, the bandwidth client used this, no stream specified.
-*
-* @return a rtmp handler, or NULL if error occured.
-*/
+ * create rtmp with url, used for connection specified application.
+ * @param url the tcUrl, for exmple:
+ *         rtmp://localhost/live
+ * @remark this is used to create application connection-oriented,
+ *       for example, the bandwidth client used this, no stream specified.
+ * @remark default timeout to 30s if not set by srs_rtmp_set_timeout.
+ *
+ * @return a rtmp handler, or NULL if error occured.
+ */
 extern srs_rtmp_t srs_rtmp_create2(const char* url);
 /**
  * set socket timeout
  * @param recv_timeout_ms the timeout for receiving messages in ms.
  * @param send_timeout_ms the timeout for sending message in ms.
+ * @remark user can set timeout once srs_rtmp_create/srs_rtmp_create2, 
+ *      or before srs_rtmp_handshake or srs_rtmp_dns_resolve to connect to server.
+ * @remark default timeout to 30s if not set by srs_rtmp_set_timeout.
  *
  * @return 0, success; otherswise, failed.
  */