listen and serve stream caster mpegts over udp.

@@ -323,6 +323,12 @@ else
     echo "#undef SRS_AUTO_HTTP_SERVER" >> $SRS_AUTO_HEADERS_H
 fi
 
+if [ $SRS_STREAM_CASTER = YES ]; then
+    echo "#define SRS_AUTO_STREAM_CASTER" >> $SRS_AUTO_HEADERS_H
+else
+    echo "#undef SRS_AUTO_STREAM_CASTER" >> $SRS_AUTO_HEADERS_H
+fi
+
 if [ $SRS_HTTP_API = YES ]; then
     echo "#define SRS_AUTO_HTTP_API" >> $SRS_AUTO_HEADERS_H
 else

@@ -25,6 +25,7 @@ SRS_INGEST=RESERVED
 SRS_STAT=RESERVED
 SRS_HTTP_CALLBACK=RESERVED
 SRS_HTTP_SERVER=RESERVED
+SRS_STREAM_CASTER=RESERVED
 SRS_HTTP_API=RESERVED
 SRS_LIBRTMP=RESERVED
 SRS_RESEARCH=RESERVED
@@ -114,6 +115,7 @@ Options:
                             build nginx at: ./objs/nginx/sbin/nginx
   --with-http-callback      enable http hooks, build cherrypy as demo api server.
   --with-http-server        enable http server to delivery http stream.
+  --with-stream-caster      enable stream caster to serve other stream over other protocol.
   --with-http-api           enable http api, to manage SRS by http api.
   --with-ffmpeg             enable transcoding tool ffmpeg.
                             build ffmpeg at: ./objs/ffmpeg/bin/ffmpeg
@@ -138,6 +140,7 @@ Options:
   --without-nginx           disable delivery HTTP stream with nginx.
   --without-http-callback   disable http, http hooks callback.
   --without-http-server     disable http server, use external server to delivery http stream.
+  --without-stream-caster   disable stream caster, only listen and serve RTMP/HTTP.
   --without-http-api        disable http api, only use console to manage SRS process.
   --without-ffmpeg          disable the ffmpeg transcode tool feature.
   --without-transcode       disable the transcoding feature.
@@ -213,6 +216,7 @@ function parse_user_option() {
         --with-stat)                    SRS_STAT=YES                ;;
         --with-http-callback)           SRS_HTTP_CALLBACK=YES       ;;
         --with-http-server)             SRS_HTTP_SERVER=YES         ;;
+        --with-stream-caster)           SRS_STREAM_CASTER=YES       ;;
         --with-http-api)                SRS_HTTP_API=YES            ;;
         --with-librtmp)                 SRS_LIBRTMP=YES             ;;
         --with-research)                SRS_RESEARCH=YES            ;;
@@ -235,6 +239,7 @@ function parse_user_option() {
         --without-stat)                 SRS_STAT=NO                 ;;
         --without-http-callback)        SRS_HTTP_CALLBACK=NO        ;;
         --without-http-server)          SRS_HTTP_SERVER=NO          ;;
+        --without-stream-caster)        SRS_STREAM_CASTER=NO        ;;
         --without-http-api)             SRS_HTTP_API=NO             ;;
         --without-librtmp)              SRS_LIBRTMP=NO              ;;
         --without-research)             SRS_RESEARCH=NO             ;;
@@ -362,6 +367,7 @@ function apply_user_presets() {
         SRS_HTTP_PARSER=NO
         SRS_HTTP_CALLBACK=NO
         SRS_HTTP_SERVER=NO
+        SRS_STREAM_CASTER=NO
         SRS_HTTP_API=NO
         SRS_LIBRTMP=NO
         SRS_RESEARCH=NO
@@ -387,6 +393,7 @@ function apply_user_presets() {
         SRS_HTTP_PARSER=YES
         SRS_HTTP_CALLBACK=YES
         SRS_HTTP_SERVER=YES
+        SRS_STREAM_CASTER=YES
         SRS_HTTP_API=YES
         SRS_LIBRTMP=YES
         SRS_RESEARCH=YES
@@ -412,6 +419,7 @@ function apply_user_presets() {
         SRS_HTTP_PARSER=NO
         SRS_HTTP_CALLBACK=NO
         SRS_HTTP_SERVER=NO
+        SRS_STREAM_CASTER=NO
         SRS_HTTP_API=NO
         SRS_LIBRTMP=NO
         SRS_RESEARCH=NO
@@ -437,6 +445,7 @@ function apply_user_presets() {
         SRS_HTTP_PARSER=NO
         SRS_HTTP_CALLBACK=NO
         SRS_HTTP_SERVER=NO
+        SRS_STREAM_CASTER=NO
         SRS_HTTP_API=NO
         SRS_LIBRTMP=NO
         SRS_RESEARCH=NO
@@ -462,6 +471,7 @@ function apply_user_presets() {
         SRS_HTTP_PARSER=NO
         SRS_HTTP_CALLBACK=NO
         SRS_HTTP_SERVER=NO
+        SRS_STREAM_CASTER=NO
         SRS_HTTP_API=NO
         SRS_LIBRTMP=NO
         SRS_RESEARCH=NO
@@ -487,6 +497,7 @@ function apply_user_presets() {
         SRS_HTTP_PARSER=YES
         SRS_HTTP_CALLBACK=YES
         SRS_HTTP_SERVER=YES
+        SRS_STREAM_CASTER=YES
         SRS_HTTP_API=YES
         SRS_LIBRTMP=YES
         SRS_RESEARCH=NO
@@ -513,6 +524,7 @@ function apply_user_presets() {
         SRS_HTTP_PARSER=YES
         SRS_HTTP_CALLBACK=YES
         SRS_HTTP_SERVER=YES
+        SRS_STREAM_CASTER=YES
         SRS_HTTP_API=YES
         SRS_LIBRTMP=YES
         SRS_RESEARCH=NO
@@ -538,6 +550,7 @@ function apply_user_presets() {
         SRS_HTTP_PARSER=YES
         SRS_HTTP_CALLBACK=YES
         SRS_HTTP_SERVER=YES
+        SRS_STREAM_CASTER=YES
         SRS_HTTP_API=YES
         SRS_LIBRTMP=YES
         SRS_RESEARCH=NO
@@ -563,6 +576,7 @@ function apply_user_presets() {
         SRS_HTTP_PARSER=YES
         SRS_HTTP_CALLBACK=YES
         SRS_HTTP_SERVER=YES
+        SRS_STREAM_CASTER=YES
         SRS_HTTP_API=YES
         SRS_LIBRTMP=YES
         SRS_RESEARCH=YES
@@ -588,6 +602,7 @@ function apply_user_presets() {
         SRS_HTTP_PARSER=YES
         SRS_HTTP_CALLBACK=YES
         SRS_HTTP_SERVER=YES
+        SRS_STREAM_CASTER=YES
         SRS_HTTP_API=YES
         SRS_LIBRTMP=NO
         SRS_RESEARCH=NO
@@ -613,6 +628,7 @@ function apply_user_presets() {
         SRS_HTTP_PARSER=YES
         SRS_HTTP_CALLBACK=YES
         SRS_HTTP_SERVER=YES
+        SRS_STREAM_CASTER=YES
         SRS_HTTP_API=YES
         SRS_LIBRTMP=YES
         SRS_RESEARCH=NO
@@ -638,6 +654,7 @@ function apply_user_presets() {
         SRS_HTTP_PARSER=YES
         SRS_HTTP_CALLBACK=YES
         SRS_HTTP_SERVER=YES
+        SRS_STREAM_CASTER=YES
         SRS_HTTP_API=YES
         SRS_LIBRTMP=YES
         SRS_RESEARCH=NO
@@ -663,6 +680,7 @@ function apply_user_presets() {
         SRS_HTTP_PARSER=YES
         SRS_HTTP_CALLBACK=YES
         SRS_HTTP_SERVER=YES
+        SRS_STREAM_CASTER=YES
         SRS_HTTP_API=YES
         SRS_LIBRTMP=YES
         SRS_RESEARCH=NO
@@ -723,6 +741,7 @@ function apply_user_detail_options() {
         SRS_HTTP_PARSER=NO
         SRS_HTTP_CALLBACK=NO
         SRS_HTTP_SERVER=NO
+        SRS_STREAM_CASTER=NO
         SRS_HTTP_API=NO
         SRS_LIBRTMP=YES
         SRS_RESEARCH=YES
@@ -752,6 +771,7 @@ function regenerate_options() {
     if [ $SRS_STAT = YES ]; then SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --with-stat"; else SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --without-stat"; fi
     if [ $SRS_HTTP_CALLBACK = YES ]; then SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --with-http-callback"; else SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --without-http-callback"; fi
     if [ $SRS_HTTP_SERVER = YES ]; then SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --with-http-server"; else SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --without-http-server"; fi
+    if [ $SRS_STREAM_CASTER = YES ]; then SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --with-stream-caster"; else SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --without-stream-caster"; fi
     if [ $SRS_HTTP_API = YES ]; then SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --with-http-api"; else SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --without-http-api"; fi
     if [ $SRS_LIBRTMP = YES ]; then SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --with-librtmp"; else SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --without-librtmp"; fi
     if [ $SRS_RESEARCH = YES ]; then SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --with-research"; else SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --without-research"; fi
@@ -828,6 +848,7 @@ function check_option_conflicts() {
     if [ $SRS_FFMPEG_TOOL = RESERVED ]; then echo "you must specifies the ffmpeg, see: ./configure --help"; __check_ok=NO; fi
     if [ $SRS_HTTP_CALLBACK = RESERVED ]; then echo "you must specifies the http-callback, see: ./configure --help"; __check_ok=NO; fi
     if [ $SRS_HTTP_SERVER = RESERVED ]; then echo "you must specifies the http-server, see: ./configure --help"; __check_ok=NO; fi
+    if [ $SRS_STREAM_CASTER = RESERVED ]; then echo "you must specifies the stream-caster, see: ./configure --help"; __check_ok=NO; fi
     if [ $SRS_HTTP_API = RESERVED ]; then echo "you must specifies the http-api, see: ./configure --help"; __check_ok=NO; fi
     if [ $SRS_LIBRTMP = RESERVED ]; then echo "you must specifies the librtmp, see: ./configure --help"; __check_ok=NO; fi
     if [ $SRS_RESEARCH = RESERVED ]; then echo "you must specifies the research, see: ./configure --help"; __check_ok=NO; fi

@@ -142,6 +142,16 @@ stream_caster {
     # whether stream caster is enabled.
     # default: off
     enabled         on;
+    # the caster type of stream, the casters:
+    #       mpegts_over_udp, MPEG-TS over UDP caster.
+    caster          mpegts_over_udp;
+    # the output rtmp url.
+    # for example, rtmp://127.0.0.1/live/livestream.
+    output          rtmp://127.0.0.1/live/livestream;
+    # the listen port for stream caster.
+    # for caster:
+    #       mpegts_over_udp, listen at udp port.
+    listen          1935;
 }
 
 #############################################################################################

@@ -140,6 +140,11 @@ bool SrsConfDirective::is_vhost()
     return name == "vhost";
 }
 
+bool SrsConfDirective::is_stream_caster()
+{
+    return name == "stream_caster";
+}
+
 int SrsConfDirective::parse(SrsConfigBuffer* buffer)
 {
     return parse_conf(buffer, parse_file);
@@ -519,6 +524,8 @@ int SrsConfig::reload_conf(SrsConfig* conf)
         return ret;
     }
 
+    // TODO: FIXME: support reload stream_caster.
+
     // merge config: vhost
     if ((ret = reload_vhost(old_root)) != ERROR_SUCCESS) {
         return ret;
@@ -1295,6 +1302,7 @@ int SrsConfig::check_config()
     srs_trace("srs checking config...");
     
     vector<SrsConfDirective*> vhosts = get_vhosts();
+    vector<SrsConfDirective*> stream_casters = get_stream_casters();
 
     ////////////////////////////////////////////////////////////////////////
     // check empty
@@ -1315,7 +1323,7 @@ int SrsConfig::check_config()
             && n != "srs_log_tank" && n != "srs_log_level" && n != "srs_log_file"
             && n != "max_connections" && n != "daemon" && n != "heartbeat"
             && n != "http_api" && n != "stats" && n != "vhost" && n != "pithy_print"
-            && n != "http_stream" && n != "http_server") 
+            && n != "http_stream" && n != "http_server" && n != "stream_caster") 
         {
             ret = ERROR_SYSTEM_CONFIG_INVALID;
             srs_error("unsupported directive %s, ret=%d", n.c_str(), ret);
@@ -1381,6 +1389,20 @@ int SrsConfig::check_config()
             }
         }
     }
+    for (int n = 0; n < (int)stream_casters.size(); n++) {
+        SrsConfDirective* stream_caster = stream_casters[n];
+        for (int i = 0; stream_caster && i < (int)stream_caster->directives.size(); i++) {
+            SrsConfDirective* conf = stream_caster->at(i);
+            string n = conf->name;
+            if (n != "enabled" && n != "caster" && n != "output"
+                && n != "listen"
+            ) {
+                ret = ERROR_SYSTEM_CONFIG_INVALID;
+                srs_error("unsupported stream_caster directive %s, ret=%d", n.c_str(), ret);
+                return ret;
+            }
+        }
+    }
     for (int n = 0; n < (int)vhosts.size(); n++) {
         SrsConfDirective* vhost = vhosts[n];
         for (int i = 0; vhost && i < (int)vhost->directives.size(); i++) {
@@ -1969,6 +1991,77 @@ int SrsConfig::get_pithy_print_edge()
     return ::atoi(pithy->arg0().c_str());
 }
 
+vector<SrsConfDirective*> SrsConfig::get_stream_casters()
+{
+    srs_assert(root);
+    
+    std::vector<SrsConfDirective*> stream_casters;
+    
+    for (int i = 0; i < (int)root->directives.size(); i++) {
+        SrsConfDirective* conf = root->at(i);
+        
+        if (!conf->is_stream_caster()) {
+            continue;
+        }
+        
+        stream_casters.push_back(conf);
+    }
+    
+    return stream_casters;
+}
+
+bool SrsConfig::get_stream_caster_enabled(SrsConfDirective* sc)
+{
+    srs_assert(sc);
+
+    SrsConfDirective* conf = sc->get("enabled");
+    if (!conf) {
+        return SRS_CONF_DEFAULT_STREAM_CASTER_ENABLED;
+    }
+
+    if (conf->arg0() != "on") {
+        return false;
+    }
+
+    return true;
+}
+
+string SrsConfig::get_stream_caster_engine(SrsConfDirective* sc)
+{
+    srs_assert(sc);
+
+    SrsConfDirective* conf = sc->get("caster");
+    if (!conf) {
+        return "";
+    }
+
+    return conf->arg0();
+}
+
+string SrsConfig::get_stream_caster_output(SrsConfDirective* sc)
+{
+    srs_assert(sc);
+
+    SrsConfDirective* conf = sc->get("output");
+    if (!conf) {
+        return "";
+    }
+
+    return conf->arg0();
+}
+
+int SrsConfig::get_stream_caster_listen(SrsConfDirective* sc)
+{
+    srs_assert(sc);
+
+    SrsConfDirective* conf = sc->get("listen");
+    if (!conf) {
+        return 0;
+    }
+
+    return ::atoi(conf->arg0().c_str());
+}
+
 SrsConfDirective* SrsConfig::get_vhost(string vhost)
 {
     srs_assert(root);

@@ -80,6 +80,9 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #define SRS_CONF_DEFAULT_SECURITY_ENABLED false
 
+#define SRS_CONF_DEFAULT_STREAM_CASTER_ENABLED false
+#define SRS_CONF_DEFAULT_STREAM_CASTER_MPEGTS_OVER_UDP "mpegts_over_udp"
+
 #define SRS_CONF_DEFAULT_STATS_NETWORK_DEVICE_INDEX 0
 
 #define SRS_CONF_DEFAULT_STAGE_PLAY_USER_INTERVAL_MS 10000
@@ -188,6 +191,10 @@ public:
     * whether current directive is vhost.
     */
     virtual bool is_vhost();
+    /**
+    * whether current directive is stream_caster.
+    */
+    virtual bool is_stream_caster();
 // parse utilities
 public:
     /**
@@ -446,6 +453,28 @@ public:
     * the edge will get stream from upnode.
     */
     virtual int                 get_pithy_print_edge();
+// stream_caster section
+public:
+    /**
+    * get all stream_caster in config file.
+    */
+    virtual std::vector<SrsConfDirective*>  get_stream_casters();
+    /**
+    * get whether the specified stream_caster is enabled.
+    */
+    virtual bool                get_stream_caster_enabled(SrsConfDirective* sc);
+    /**
+    * get the engine of stream_caster, the caster config.
+    */
+    virtual std::string         get_stream_caster_engine(SrsConfDirective* sc);
+    /**
+    * get the output rtmp url of stream_caster, the output config.
+    */
+    virtual std::string         get_stream_caster_output(SrsConfDirective* sc);
+    /**
+    * get the listen port of stream caster.
+    */
+    virtual int                 get_stream_caster_listen(SrsConfDirective* sc);
 // vhost specified section
 public:
     /**

@@ -93,6 +93,22 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 //      SRS_SYS_CYCLE_INTERVAL * SRS_SYS_NETWORK_DEVICE_RESOLUTION_TIMES
 #define SRS_SYS_NETWORK_DEVICE_RESOLUTION_TIMES 9
 
+std::string __srs_listener_type2string(SrsListenerType type) 
+{
+    switch (type) {
+    case SrsListenerRtmpStream:
+        return "RTMP";
+    case SrsListenerHttpApi:
+        return "HTTP-API";
+    case SrsListenerHttpStream:
+        return "HTTP-Server";
+    case SrsListenerMpegTsOverUdp:
+        return "MPEG-TS over UDP";
+    default:
+        return "UNKONWN";
+    }
+}
+
 SrsListener::SrsListener(SrsServer* server, SrsListenerType type)
 {
     fd = -1;
@@ -174,16 +190,13 @@ int SrsListener::listen(int port)
     }
     srs_verbose("create st listen thread success, port=%d", port);
     
-    srs_trace("listen thread cid=%d, current_cid=%d, "
+    srs_info("listen thread cid=%d, current_cid=%d, "
         "listen at port=%d, type=%d, fd=%d started success, port=%d", 
         pthread->cid(), _srs_context->get_id(), _port, _type, fd, port);
 
-    return ret;
-}
+    srs_trace("%s listen at tcp://%d, fd=%d", __srs_listener_type2string(_type).c_str(), _port, fd);
     
-void SrsListener::on_thread_start()
-{
-    srs_trace("listen cycle start, port=%d, type=%d, fd=%d", _port, _type, fd);
+    return ret;
 }
 
 int SrsListener::cycle()
@@ -207,6 +220,86 @@ int SrsListener::cycle()
     return ret;
 }
 
+SrsUdpListener::SrsUdpListener(SrsServer* server, SrsListenerType type) : SrsListener(server, type)
+{
+}
+
+SrsUdpListener::~SrsUdpListener()
+{
+}
+
+int SrsUdpListener::listen(int port)
+{
+    int ret = ERROR_SUCCESS;
+
+    // the caller already ensure the type is ok,
+    // we just assert here for unknown stream caster.
+    srs_assert(_type == SrsListenerMpegTsOverUdp);
+    
+    _port = port;
+    
+    if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
+        ret = ERROR_SOCKET_CREATE;
+        srs_error("create linux socket error. port=%d, ret=%d", port, ret);
+        return ret;
+    }
+    srs_verbose("create linux socket success. port=%d, fd=%d", port, fd);
+    
+    int reuse_socket = 1;
+    if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse_socket, sizeof(int)) == -1) {
+        ret = ERROR_SOCKET_SETREUSE;
+        srs_error("setsockopt reuse-addr error. port=%d, ret=%d", port, ret);
+        return ret;
+    }
+    srs_verbose("setsockopt reuse-addr success. port=%d, fd=%d", port, fd);
+    
+    sockaddr_in addr;
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(_port);
+    addr.sin_addr.s_addr = INADDR_ANY;
+    if (bind(fd, (const sockaddr*)&addr, sizeof(sockaddr_in)) == -1) {
+        ret = ERROR_SOCKET_BIND;
+        srs_error("bind socket error. port=%d, ret=%d", port, ret);
+        return ret;
+    }
+    srs_verbose("bind socket success. port=%d, fd=%d", port, fd);
+    
+    if ((stfd = st_netfd_open_socket(fd)) == NULL){
+        ret = ERROR_ST_OPEN_SOCKET;
+        srs_error("st_netfd_open_socket open socket failed. port=%d, ret=%d", port, ret);
+        return ret;
+    }
+    srs_verbose("st open socket success. port=%d, fd=%d", port, fd);
+    
+    if ((ret = pthread->start()) != ERROR_SUCCESS) {
+        srs_error("st_thread_create listen thread error. port=%d, ret=%d", port, ret);
+        return ret;
+    }
+    srs_verbose("create st listen thread success, port=%d", port);
+    
+    srs_info("listen thread cid=%d, current_cid=%d, "
+        "listen at port=%d, type=%d, fd=%d started success, port=%d", 
+        pthread->cid(), _srs_context->get_id(), _port, _type, fd, port);
+
+    srs_trace("%s listen at udp://%d, fd=%d", __srs_listener_type2string(_type).c_str(), _port, fd);
+
+    return ret;
+}
+
+int SrsUdpListener::cycle()
+{
+    int ret = ERROR_SUCCESS;
+
+    // the caller already ensure the type is ok,
+    // we just assert here for unknown stream caster.
+    srs_assert(_type == SrsListenerMpegTsOverUdp);
+
+    // TODO: FIXME: recv udp packet.
+    st_sleep(1);
+
+    return ret;
+}
+
 SrsSignalManager* SrsSignalManager::instance = NULL;
 
 SrsSignalManager::SrsSignalManager(SrsServer* server)
@@ -608,6 +701,10 @@ int SrsServer::listen()
         return ret;
     }
     
+    if ((ret = listen_stream_caster()) != ERROR_SUCCESS) {
+        return ret;
+    }
+    
     return ret;
 }
 
@@ -869,6 +966,53 @@ int SrsServer::listen_http_stream()
     return ret;
 }
 
+int SrsServer::listen_stream_caster()
+{
+    int ret = ERROR_SUCCESS;
+    
+#ifdef SRS_AUTO_STREAM_CASTER
+    close_listeners(SrsListenerMpegTsOverUdp);
+    
+    std::vector<SrsConfDirective*>::iterator it;
+    std::vector<SrsConfDirective*> stream_casters = _srs_config->get_stream_casters();
+
+    for (it = stream_casters.begin(); it != stream_casters.end(); ++it) {
+        SrsConfDirective* stream_caster = *it;
+        if (!_srs_config->get_stream_caster_enabled(stream_caster)) {
+            continue;
+        }
+
+        SrsUdpListener* listener = NULL;
+
+        std::string caster = _srs_config->get_stream_caster_engine(stream_caster);
+        if (caster == SRS_CONF_DEFAULT_STREAM_CASTER_MPEGTS_OVER_UDP) {
+            listener = new SrsUdpListener(this, SrsListenerMpegTsOverUdp);
+        } else {
+            ret = ERROR_STREAM_CASTER_ENGINE;
+            srs_error("unsupported stream caster %s. ret=%d", caster.c_str(), ret);
+            return ret;
+        }
+        srs_assert(listener != NULL);
+
+        listeners.push_back(listener);
+        
+        int port = _srs_config->get_stream_caster_listen(stream_caster);
+        if (port <= 0) {
+            ret = ERROR_STREAM_CASTER_PORT;
+            srs_error("invalid stream caster port %d. ret=%d", port, ret);
+            return ret;
+        }
+
+        if ((ret = listener->listen(port)) != ERROR_SUCCESS) {
+            srs_error("StreamCaster listen at port %d failed. ret=%d", port, ret);
+            return ret;
+        }
+    }
+#endif
+    
+    return ret;
+}
+
 void SrsServer::close_listeners(SrsListenerType type)
 {
     std::vector<SrsListener*>::iterator it;

@@ -54,14 +54,19 @@ enum SrsListenerType
     // HTTP api,
     SrsListenerHttpApi          = 1,
     // HTTP stream, HDS/HLS/DASH
-    SrsListenerHttpStream   = 2
+    SrsListenerHttpStream       = 2,
+    // UDP stream, MPEG-TS over udp.
+    SrsListenerMpegTsOverUdp    = 3,
 };
 
+/**
+* the common tcp listener, for RTMP/HTTP server.
+*/
 class SrsListener : public ISrsThreadHandler
 {
 public:
     SrsListenerType _type;
-private:
+protected:
     int fd;
     st_netfd_t stfd;
     int _port;
@@ -75,7 +80,21 @@ public:
     virtual int listen(int port);
 // interface ISrsThreadHandler.
 public:
-    virtual void on_thread_start();
+    virtual int cycle();
+};
+
+/**
+* the udp listener, for udp server.
+*/
+class SrsUdpListener : public SrsListener
+{
+public:
+    SrsUdpListener(SrsServer* server, SrsListenerType type);
+    virtual ~SrsUdpListener();
+public:
+    virtual int listen(int port);
+// interface ISrsThreadHandler.
+public:
     virtual int cycle();
 };
 
@@ -211,6 +230,7 @@ private:
     virtual int listen_rtmp();
     virtual int listen_http_api();
     virtual int listen_http_stream();
+    virtual int listen_stream_caster();
     /**
     * close the listeners for specified type, 
     * remove the listen object from manager.

@@ -204,7 +204,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define ERROR_AAC_DATA_INVALID              3048
 
 ///////////////////////////////////////////////////////
-// HTTP protocol error.
+// HTTP/StreamCaster protocol error.
 ///////////////////////////////////////////////////////
 #define ERROR_HTTP_PATTERN_EMPTY            4000
 #define ERROR_HTTP_PATTERN_DUPLICATED       4001
@@ -216,6 +216,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define ERROR_AAC_DECODE_ERROR              4007
 #define ERROR_KERNEL_MP3_STREAM_CLOSED      4008
 #define ERROR_MP3_DECODE_ERROR              4009
+#define ERROR_STREAM_CASTER_ENGINE          4010
+#define ERROR_STREAM_CASTER_PORT            4011
 
 /**
 * whether the error code is an system control error.