add connections count to api summaries. 0.9.127

@@ -240,6 +240,7 @@ Supported operating systems and hardware:
 * 2013-10-17, Created.<br/>
 
 ## History
+* v1.0, 2014-06-19, add connections count to api summaries. 0.9.127
 * v1.0, 2014-06-19, add srs bytes and kbps to api summaries. 0.9.126
 * v1.0, 2014-06-18, add network bytes to api summaries. 0.9.125
 * v1.0, 2014-06-14, fix [#98](https://github.com/winlinvip/simple-rtmp-server/issues/98), workaround for librtmp ping(fmt=1,cid=2 fresh stream). 0.9.124

@@ -462,7 +462,12 @@ int SrsApiSummaries::do_process_request(SrsSocket* skt, SrsHttpMessage* req)
                 << JFIELD_ORG("srs_recv_bytes", nrs->rbytes) << JFIELD_CONT
                 << JFIELD_ORG("srs_recv_kbps", nrs->rkbps) << JFIELD_CONT
                 << JFIELD_ORG("srs_send_bytes", nrs->sbytes) << JFIELD_CONT
-                << JFIELD_ORG("srs_send_kbps", nrs->skbps)
+                << JFIELD_ORG("srs_send_kbps", nrs->skbps) << JFIELD_CONT
+                << JFIELD_ORG("conn_sys", nrs->nb_conn_sys) << JFIELD_CONT
+                << JFIELD_ORG("conn_sys_et", nrs->nb_conn_sys_et) << JFIELD_CONT
+                << JFIELD_ORG("conn_sys_tw", nrs->nb_conn_sys_tw) << JFIELD_CONT
+                << JFIELD_ORG("conn_sys_ls", nrs->nb_conn_sys_ls) << JFIELD_CONT
+                << JFIELD_ORG("conn_srs", nrs->nb_conn_srs)
             << JOBJECT_END
         << JOBJECT_END
         << JOBJECT_END;

@@ -733,7 +733,7 @@ int SrsServer::do_cycle()
             if ((i % SRS_SYS_NETWORK_RTMP_SERVER_RESOLUTION_TIMES) == 0) {
                 srs_info("update network rtmp server info.");
                 resample_kbps(NULL);
-                srs_update_rtmp_server(kbps);
+                srs_update_rtmp_server((int)conns.size(), kbps);
             }
 #ifdef SRS_AUTO_HTTP_PARSER
             if (_srs_config->get_heartbeat_enabled()) {

@@ -528,6 +528,8 @@ SrsNetworkRtmpServer::SrsNetworkRtmpServer()
 {
     ok = false;
     sample_time = rbytes = sbytes = 0;
+    nb_conn_sys = nb_conn_srs = 0;
+    nb_conn_sys_et = nb_conn_sys_tw = nb_conn_sys_ls = 0;
 }
 
 static SrsNetworkRtmpServer _srs_network_rtmp_server;
@@ -537,23 +539,90 @@ SrsNetworkRtmpServer* srs_get_network_rtmp_server()
     return &_srs_network_rtmp_server;
 }
 
-void srs_update_rtmp_server(SrsKbps* kbps)
+// @see: http://stackoverflow.com/questions/5992211/list-of-possible-internal-socket-statuses-from-proc
+enum {
+    SYS_TCP_ESTABLISHED = 1,
+    SYS_TCP_SYN_SENT,
+    SYS_TCP_SYN_RECV,
+    SYS_TCP_FIN_WAIT1,
+    SYS_TCP_FIN_WAIT2,
+    SYS_TCP_TIME_WAIT,
+    SYS_TCP_CLOSE,
+    SYS_TCP_CLOSE_WAIT,
+    SYS_TCP_LAST_ACK,
+    SYS_TCP_LISTEN,
+    SYS_TCP_CLOSING,    /* Now a valid state */
+
+    SYS_TCP_MAX_STATES  /* Leave at the end! */
+};
+
+void srs_update_rtmp_server(int nb_conn, SrsKbps* kbps)
 {
     SrsNetworkRtmpServer& r = _srs_network_rtmp_server;
     
-    r.ok = true;
+    if (true) {
+        FILE* f = fopen("/proc/net/tcp", "r");
+        if (f == NULL) {
+            srs_warn("open proc network tcp failed, ignore");
+            return;
+        }
+        
+        // ignore title.
+        static char buf[1024];
+        fgets(buf, sizeof(buf), f);
     
-    r.sample_time = srs_get_system_time_ms();
+        int nb_conn_sys_established = 0;
+        int nb_conn_sys_time_wait = 0;
+        int nb_conn_sys_listen = 0;
+        int nb_conn_sys_other = 0;
+        for (;;) {
+            int st = 0;
+    
+            int ret = fscanf(f, "%*s %*s %*s %2x\n", &st);
+            // ignore to end.
+            fgets(buf, sizeof(buf), f);
+                
+            if (ret == 1) {
+                if (st == SYS_TCP_ESTABLISHED) {
+                    nb_conn_sys_established++;
+                } else if (st == SYS_TCP_TIME_WAIT) {
+                    nb_conn_sys_time_wait++;
+                } else if (st == SYS_TCP_LISTEN) {
+                    nb_conn_sys_listen++;
+                } else {
+                    nb_conn_sys_other++;
+                }
+            }
+            
+            if (ret == EOF) {
+                break;
+            }
+        }
+        
+        r.nb_conn_sys = nb_conn_sys_established + nb_conn_sys_time_wait + nb_conn_sys_listen + nb_conn_sys_other;
+        r.nb_conn_sys_et = nb_conn_sys_established;
+        r.nb_conn_sys_tw = nb_conn_sys_time_wait;
+        r.nb_conn_sys_ls = nb_conn_sys_listen;
     
-    r.rbytes = kbps->get_recv_bytes();
-    r.rkbps = kbps->get_recv_kbps();
-    r.rkbps_30s = kbps->get_recv_kbps_30s();
-    r.rkbps_5m = kbps->get_recv_kbps_5m();
+        fclose(f);
+    }
     
-    r.sbytes = kbps->get_send_bytes();
-    r.skbps = kbps->get_send_kbps();
-    r.skbps_30s = kbps->get_send_kbps_30s();
-    r.skbps_5m = kbps->get_send_kbps_5m();
+    if (true) {
+        r.ok = true;
+        
+        r.nb_conn_srs = nb_conn;
+        r.sample_time = srs_get_system_time_ms();
+        
+        r.rbytes = kbps->get_recv_bytes();
+        r.rkbps = kbps->get_recv_kbps();
+        r.rkbps_30s = kbps->get_recv_kbps_30s();
+        r.rkbps_5m = kbps->get_recv_kbps_5m();
+        
+        r.sbytes = kbps->get_send_bytes();
+        r.skbps = kbps->get_send_kbps();
+        r.skbps_30s = kbps->get_send_kbps_30s();
+        r.skbps_5m = kbps->get_send_kbps_5m();
+    }
 }
 
 vector<string> _srs_system_ipv4_ips;

@@ -414,13 +414,20 @@ public:
     int skbps_30s;
     int skbps_5m;
     
+    // connections
+    int nb_conn_sys;
+    int nb_conn_sys_et; // established
+    int nb_conn_sys_tw; // time wait
+    int nb_conn_sys_ls; // listen
+    int nb_conn_srs;
+    
     SrsNetworkRtmpServer();
 };
     
 // get network devices info, use cache to avoid performance problem.
 extern SrsNetworkRtmpServer* srs_get_network_rtmp_server();
 // the deamon st-thread will update it.
-extern void srs_update_rtmp_server(SrsKbps* kbps);
+extern void srs_update_rtmp_server(int nb_conn, SrsKbps* kbps);
 
 // get local ip, fill to @param ips
 extern void srs_retrieve_local_ipv4_ips();

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR "0"
 #define VERSION_MINOR "9"
-#define VERSION_REVISION "126"
+#define VERSION_REVISION "127"
 #define RTMP_SIG_SRS_VERSION VERSION_MAJOR"."VERSION_MINOR"."VERSION_REVISION
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"