refine wiki, cluster to forward.

@@ -151,7 +151,7 @@ Supported operating systems and hardware:
 1. Support listen at multiple ports.
 1. Support long time(>4.6hours) publish/play.
 1. High performace, 1800 connections(500kbps), 900Mbps, CPU 90.2%, 41MB
-1. Support forward publish stream to build active-standby [cluster](https://github.com/winlinvip/simple-rtmp-server/wiki/Cluster).
+1. Support forward publish stream to build active-standby [Forward](https://github.com/winlinvip/simple-rtmp-server/wiki/Forward).
 1. Support broadcast by forward the stream to other servers(origin/edge).
 1. Support live stream transcoding by ffmpeg.
 1. Support live stream forward(acopy/vcopy) by ffmpeg.
@@ -199,7 +199,7 @@ Supported operating systems and hardware:
 * 2013-12-25, [Release v0.9](https://github.com/winlinvip/simple-rtmp-server/releases/tag/0.9), support bandwidth test, player/encoder/chat [demos](https://github.com/winlinvip/simple-rtmp-server/wiki/SampleDemo). 20926 lines.<br/>
 * 2013-12-08, [Release v0.8](https://github.com/winlinvip/simple-rtmp-server/releases/tag/0.8), support [http hooks callback](https://github.com/winlinvip/simple-rtmp-server/wiki/HTTPCallback), update [st_load](https://github.com/winlinvip/st-load). 19186 lines.<br/>
 * 2013-12-03, [Release v0.7](https://github.com/winlinvip/simple-rtmp-server/releases/tag/0.7), support [live stream transcoding](https://github.com/winlinvip/simple-rtmp-server/wiki/FFMPEG). 17605 lines.<br/>
-* 2013-11-29, [Release v0.6](https://github.com/winlinvip/simple-rtmp-server/releases/tag/0.6), support [forward](https://github.com/winlinvip/simple-rtmp-server/wiki/Cluster) stream to origin/edge. 16094 lines.<br/>
+* 2013-11-29, [Release v0.6](https://github.com/winlinvip/simple-rtmp-server/releases/tag/0.6), support [forward](https://github.com/winlinvip/simple-rtmp-server/wiki/Forward) stream to origin/edge. 16094 lines.<br/>
 * 2013-11-26, [Release v0.5](https://github.com/winlinvip/simple-rtmp-server/releases/tag/0.5), support [HLS(m3u8)](https://github.com/winlinvip/simple-rtmp-server/wiki/DeliveryHLS), fragment and window. 14449 lines.<br/>
 * 2013-11-10, [Release v0.4](https://github.com/winlinvip/simple-rtmp-server/releases/tag/0.4), support [reload](https://github.com/winlinvip/simple-rtmp-server/wiki/Reload) config, pause, longtime publish/play. 12500 lines.<br/>
 * 2013-11-04, [Release v0.3](https://github.com/winlinvip/simple-rtmp-server/releases/tag/0.3), support [vhost](https://github.com/winlinvip/simple-rtmp-server/wiki/RtmpUrlVhost), refer, gop cache, listen multiple ports. 11773 lines.<br/>
@@ -310,7 +310,7 @@ Supported operating systems and hardware:
 * v1.0, 2014-01-19, add wiki [DeliveryHLS](https://github.com/winlinvip/simple-rtmp-server/wiki/DeliveryHLS)
 * v1.0, 2014-01-12, add wiki [HowToAskQuestion](https://github.com/winlinvip/simple-rtmp-server/wiki/HowToAskQuestion), [RtmpUrlVhost](https://github.com/winlinvip/simple-rtmp-server/wiki/RtmpUrlVhost)
 * v1.0, 2014-01-11, fix jw/flower player pause bug, which send closeStream actually.
-* v1.0, 2014-01-05, add wiki [Build](https://github.com/winlinvip/simple-rtmp-server/wiki/Build), [Performance](https://github.com/winlinvip/simple-rtmp-server/wiki/Performance), [Cluster](https://github.com/winlinvip/simple-rtmp-server/wiki/Cluster)
+* v1.0, 2014-01-05, add wiki [Build](https://github.com/winlinvip/simple-rtmp-server/wiki/Build), [Performance](https://github.com/winlinvip/simple-rtmp-server/wiki/Performance), [Forward](https://github.com/winlinvip/simple-rtmp-server/wiki/Forward)
 * v1.0, 2014-01-01, change listen(512), chunk-size(60000), to improve performance.
 * v1.0, 2013-12-27, merge from wenjie, the bandwidth test feature.
 * <strong>v0.9, 2013-12-25, [v0.9](https://github.com/winlinvip/simple-rtmp-server/releases/tag/0.9) released. 20926 lines.</strong>
@@ -507,8 +507,8 @@ to ingest any input to rtmp, push to SRS.
 
 ### [RTMP cluster(origin/edge) Architecture](https://github.com/winlinvip/simple-rtmp-server/wiki/Edge)
 
-Remark: cluster over forward, see [Cluster](https://github.com/winlinvip/simple-rtmp-server/wiki/Cluster)
 Remark: cluster over edge, see [Edge](https://github.com/winlinvip/simple-rtmp-server/wiki/Edge)
+Remark: cluster over forward, see [Forward](https://github.com/winlinvip/simple-rtmp-server/wiki/Forward)
 
 <pre>
 +---------+       +-----------------+     +-----------------------+ 

@@ -993,6 +993,25 @@ string srs_get_local_ip(int fd)
     return ip;
 }
 
+int srs_get_local_port(int fd)
+{
+    std::string ip;
+
+    // discovery client information
+    sockaddr_in addr;
+    socklen_t addrlen = sizeof(addr);
+    if (getsockname(fd, (sockaddr*)&addr, &addrlen) == -1) {
+        return 0;
+    }
+    srs_verbose("get local ip success.");
+    
+    int port = ntohs(addr.sin_port);
+
+    srs_verbose("get local ip of client port=%s, fd=%d", port, fd);
+
+    return port;
+}
+
 string srs_get_peer_ip(int fd)
 {
     std::string ip;

@@ -619,12 +619,14 @@ extern std::vector<std::string>& srs_get_local_ipv4_ips();
 
 // get local or peer ip.
 // where local ip is the server ip which client connected.
-std::string srs_get_local_ip(int fd);
+extern std::string srs_get_local_ip(int fd);
+// get the local id port.
+extern int srs_get_local_port(int fd);
 // where peer ip is the client public ip which connected to server.
-std::string srs_get_peer_ip(int fd);
+extern std::string srs_get_peer_ip(int fd);
 
 // dump summaries for /api/v1/summaries.
-void srs_api_dump_summaries(std::stringstream& ss);
+extern void srs_api_dump_summaries(std::stringstream& ss);
 
 #endif