diff --git a/trunk/src/app/srs_app_forward.cpp b/trunk/src/app/srs_app_forward.cpp
index 028b5d218..c2882be55 100644
--- a/trunk/src/app/srs_app_forward.cpp
+++ b/trunk/src/app/srs_app_forward.cpp
@@ -45,51 +45,47 @@ using namespace std;
 #include <srs_kernel_codec.hpp>
 #include <srs_core_autofree.hpp>
 #include <srs_kernel_utility.hpp>
+#include <srs_app_rtmp_conn.hpp>
 
 // when error, forwarder sleep for a while and retry.
 #define SRS_FORWARDER_SLEEP_US (int64_t)(3*1000*1000LL)
 
-SrsForwarder::SrsForwarder(SrsSource* _source)
+SrsForwarder::SrsForwarder(SrsSource* s)
 {
-    source = _source;
+    source = s;
     
-    _req = NULL;
-    client = NULL;
-    transport = new SrsTcpClient();
-    kbps = new SrsKbps();
-    stream_id = 0;
+    req = NULL;
+    sh_video = sh_audio = NULL;
 
+    sdk = new SrsSimpleRtmpClient();
     pthread = new SrsReusableThread2("forward", this, SRS_FORWARDER_SLEEP_US);
     queue = new SrsMessageQueue();
     jitter = new SrsRtmpJitter();
-    
-    sh_video = sh_audio = NULL;
 }
 
 SrsForwarder::~SrsForwarder()
 {
     on_unpublish();
     
-    srs_freep(transport);
+    srs_freep(sdk);
     srs_freep(pthread);
     srs_freep(queue);
     srs_freep(jitter);
-    srs_freep(kbps);
     
     srs_freep(sh_video);
     srs_freep(sh_audio);
 }
 
-int SrsForwarder::initialize(SrsRequest* req, string ep_forward)
+int SrsForwarder::initialize(SrsRequest* r, string ep)
 {
     int ret = ERROR_SUCCESS;
     
     // it's ok to use the request object,
     // SrsSource already copy it and never delete it.
-    _req = req;
+    req = r;
     
     // the ep(endpoint) to forward to
-    _ep_forward = ep_forward;
+    ep_forward = ep;
     
     return ret;
 }
@@ -103,12 +99,17 @@ int SrsForwarder::on_publish()
 {
     int ret = ERROR_SUCCESS;
     
-    SrsRequest* req = _req;
-    
     // discovery the server port and tcUrl from req and ep_forward.
-    int port;
-    std::string server, tc_url;
-    discovery_ep(server, port, tc_url);
+    std::string server;
+    std::string tcUrl;
+    int port = SRS_CONSTS_RTMP_DEFAULT_PORT;
+    if (true) {
+        // parse host:port from hostport.
+        srs_parse_hostport(ep_forward, server, port);
+        
+        // generate tcUrl
+        tcUrl = srs_generate_tc_url(server, req->vhost, req->app, port, req->param);
+    }
     
     // dead loop check
     std::string source_ep = "rtmp://";
@@ -119,7 +120,7 @@ int SrsForwarder::on_publish()
     source_ep += req->vhost;
     
     std::string dest_ep = "rtmp://";
-    if (_ep_forward == SRS_CONSTS_LOCALHOST) {
+    if (ep_forward == SRS_CONSTS_LOCALHOST) {
         dest_ep += req->host;
     } else {
         dest_ep += server;
@@ -136,7 +137,7 @@ int SrsForwarder::on_publish()
         return ret;
     }
     srs_trace("start forward %s to %s, tcUrl=%s, stream=%s", 
-        source_ep.c_str(), dest_ep.c_str(), tc_url.c_str(), 
+        source_ep.c_str(), dest_ep.c_str(), tcUrl.c_str(),
         req->stream.c_str());
     
     if ((ret = pthread->start()) != ERROR_SUCCESS) {
@@ -151,10 +152,7 @@ int SrsForwarder::on_publish()
 void SrsForwarder::on_unpublish()
 {
     pthread->stop();
-    transport->close();
-    
-    srs_freep(client);
-    kbps->set_io(NULL, NULL);
+    sdk->close();
 }
 
 int SrsForwarder::on_meta_data(SrsSharedPtrMessage* shared_metadata)
@@ -228,32 +226,26 @@ int SrsForwarder::cycle()
 {
     int ret = ERROR_SUCCESS;
     
-    std::string ep_server;
-    int ep_port;
-    if ((ret = connect_server(ep_server, ep_port)) != ERROR_SUCCESS) {
-        return ret;
+    std::string url;
+    if (true) {
+        std::string server;
+        int port = SRS_CONSTS_RTMP_DEFAULT_PORT;
+        
+        // parse host:port from hostport.
+        srs_parse_hostport(ep_forward, server, port);
+        
+        // generate url
+        url = srs_generate_rtmp_url(server, port, req->vhost, req->app, req->stream);
     }
-    srs_assert(client);
-
-    client->set_recv_timeout(SRS_CONSTS_RTMP_TIMEOUT_US);
-    client->set_send_timeout(SRS_CONSTS_RTMP_TIMEOUT_US);
     
-    if ((ret = client->handshake()) != ERROR_SUCCESS) {
-        srs_error("handshake with server failed. ret=%d", ret);
-        return ret;
-    }
-    if ((ret = connect_app(ep_server, ep_port)) != ERROR_SUCCESS) {
-        srs_error("connect with server failed. ret=%d", ret);
-        return ret;
-    }
-    if ((ret = client->create_stream(stream_id)) != ERROR_SUCCESS) {
-        srs_error("connect with server failed, stream_id=%d. ret=%d", stream_id, ret);
+    int64_t cto = SRS_FORWARDER_SLEEP_US;
+    int64_t sto = SRS_CONSTS_RTMP_TIMEOUT_US;
+    if ((ret = sdk->connect(url, cto, sto)) != ERROR_SUCCESS) {
+        srs_warn("forward failed, url=%s, cto=%"PRId64", sto=%"PRId64". ret=%d", url.c_str(), cto, sto, ret);
         return ret;
     }
     
-    if ((ret = client->publish(_req->stream, stream_id)) != ERROR_SUCCESS) {
-        srs_error("connect with server failed, stream_name=%s, stream_id=%d. ret=%d", 
-            _req->stream.c_str(), stream_id, ret);
+    if ((ret = sdk->publish()) != ERROR_SUCCESS) {
         return ret;
     }
     
@@ -269,106 +261,12 @@ int SrsForwarder::cycle()
     return ret;
 }
 
-void SrsForwarder::discovery_ep(string& server, int& port, string& tc_url)
-{
-    SrsRequest* req = _req;
-    
-    port = SRS_CONSTS_RTMP_DEFAULT_PORT;
-    srs_parse_hostport(_ep_forward, server, port);
-    
-    // generate tcUrl
-    tc_url = srs_generate_tc_url(server, req->vhost, req->app, port, req->param);
-}
-
-int SrsForwarder::connect_server(string& ep_server, int& ep_port)
-{
-    int ret = ERROR_SUCCESS;
-    
-    // reopen
-    transport->close();
-    
-    // discovery the server port and tcUrl from req and ep_forward.
-    string tc_url;
-    discovery_ep(ep_server, ep_port, tc_url);
-    
-    // open socket.
-    int64_t timeout = SRS_FORWARDER_SLEEP_US;
-    if ((ret = transport->connect(ep_server, ep_port, timeout)) != ERROR_SUCCESS) {
-        srs_warn("forward failed, stream=%s, tcUrl=%s to server=%s, port=%d, timeout=%"PRId64", ret=%d",
-            _req->stream.c_str(), _req->tcUrl.c_str(), ep_server.c_str(), ep_port, timeout, ret);
-        return ret;
-    }
-    
-    srs_freep(client);
-    client = new SrsRtmpClient(transport);
-    
-    kbps->set_io(transport, transport);
-    
-    srs_trace("forward connected, stream=%s, tcUrl=%s to server=%s, port=%d",
-        _req->stream.c_str(), _req->tcUrl.c_str(), ep_server.c_str(), ep_port);
-    
-    return ret;
-}
-
-// TODO: FIXME: refine the connect_app.
-int SrsForwarder::connect_app(string ep_server, int ep_port)
-{
-    int ret = ERROR_SUCCESS;
-    
-    SrsRequest* req = _req;
-    
-    // args of request takes the srs info.
-    if (req->args == NULL) {
-        req->args = SrsAmf0Any::object();
-    }
-    
-    // notify server the edge identity,
-    // @see https://github.com/simple-rtmp-server/srs/issues/147
-    SrsAmf0Object* data = req->args;
-    data->set("srs_sig", SrsAmf0Any::str(RTMP_SIG_SRS_KEY));
-    data->set("srs_server", SrsAmf0Any::str(RTMP_SIG_SRS_SERVER));
-    data->set("srs_license", SrsAmf0Any::str(RTMP_SIG_SRS_LICENSE));
-    data->set("srs_role", SrsAmf0Any::str(RTMP_SIG_SRS_ROLE));
-    data->set("srs_url", SrsAmf0Any::str(RTMP_SIG_SRS_URL));
-    data->set("srs_version", SrsAmf0Any::str(RTMP_SIG_SRS_VERSION));
-    data->set("srs_site", SrsAmf0Any::str(RTMP_SIG_SRS_WEB));
-    data->set("srs_email", SrsAmf0Any::str(RTMP_SIG_SRS_EMAIL));
-    data->set("srs_copyright", SrsAmf0Any::str(RTMP_SIG_SRS_COPYRIGHT));
-    data->set("srs_primary", SrsAmf0Any::str(RTMP_SIG_SRS_PRIMARY));
-    data->set("srs_authors", SrsAmf0Any::str(RTMP_SIG_SRS_AUTHROS));
-    // for edge to directly get the id of client.
-    data->set("srs_pid", SrsAmf0Any::number(getpid()));
-    data->set("srs_id", SrsAmf0Any::number(_srs_context->get_id()));
-    
-    // local ip of edge
-    std::vector<std::string> ips = srs_get_local_ipv4_ips();
-    assert(_srs_config->get_stats_network() < (int)ips.size());
-    std::string local_ip = ips[_srs_config->get_stats_network()];
-    data->set("srs_server_ip", SrsAmf0Any::str(local_ip.c_str()));
-    
-    // generate the tcUrl
-    std::string param = "";
-    std::string tc_url = srs_generate_tc_url(ep_server, req->vhost, req->app, ep_port, param);
-    
-    // upnode server identity will show in the connect_app of client.
-    // @see https://github.com/simple-rtmp-server/srs/issues/160
-    // the debug_srs_upnode is config in vhost and default to true.
-    bool debug_srs_upnode = _srs_config->get_debug_srs_upnode(req->vhost);
-    if ((ret = client->connect_app(req->app, tc_url, req, debug_srs_upnode)) != ERROR_SUCCESS) {
-        srs_error("connect with server failed, tcUrl=%s, dsu=%d. ret=%d", 
-            tc_url.c_str(), debug_srs_upnode, ret);
-        return ret;
-    }
-    
-    return ret;
-}
-
 #define SYS_MAX_FORWARD_SEND_MSGS 128
 int SrsForwarder::forward()
 {
     int ret = ERROR_SUCCESS;
     
-    client->set_recv_timeout(SRS_CONSTS_RTMP_PULSE_TIMEOUT_US);
+    sdk->set_recv_timeout(SRS_CONSTS_RTMP_PULSE_TIMEOUT_US);
     
     SrsPithyPrint* pprint = SrsPithyPrint::create_forwarder();
     SrsAutoFree(SrsPithyPrint, pprint);
@@ -378,13 +276,13 @@ int SrsForwarder::forward()
     // update sequence header
     // TODO: FIXME: maybe need to zero the sequence header timestamp.
     if (sh_video) {
-        if ((ret = client->send_and_free_message(sh_video->copy(), stream_id)) != ERROR_SUCCESS) {
+        if ((ret = sdk->send_and_free_message(sh_video->copy())) != ERROR_SUCCESS) {
             srs_error("forwarder send sh_video to server failed. ret=%d", ret);
             return ret;
         }
     }
     if (sh_audio) {
-        if ((ret = client->send_and_free_message(sh_audio->copy(), stream_id)) != ERROR_SUCCESS) {
+        if ((ret = sdk->send_and_free_message(sh_audio->copy())) != ERROR_SUCCESS) {
             srs_error("forwarder send sh_audio to server failed. ret=%d", ret);
             return ret;
         }
@@ -396,7 +294,7 @@ int SrsForwarder::forward()
         // read from client.
         if (true) {
             SrsCommonMessage* msg = NULL;
-            ret = client->recv_message(&msg);
+            ret = sdk->recv_message(&msg);
             
             srs_verbose("play loop recv message. ret=%d", ret);
             if (ret != ERROR_SUCCESS && ret != ERROR_SOCKET_TIMEOUT) {
@@ -417,12 +315,7 @@ int SrsForwarder::forward()
         
         // pithy print
         if (pprint->can_print()) {
-            kbps->sample();
-            srs_trace("-> "SRS_CONSTS_LOG_FOWARDER
-                " time=%"PRId64", msgs=%d, okbps=%d,%d,%d, ikbps=%d,%d,%d", 
-                pprint->age(), count,
-                kbps->get_send_kbps(), kbps->get_send_kbps_30s(), kbps->get_send_kbps_5m(),
-                kbps->get_recv_kbps(), kbps->get_recv_kbps_30s(), kbps->get_recv_kbps_5m());
+            sdk->kbps_sample(SRS_CONSTS_LOG_FOWARDER, pprint->age(), count);
         }
         
         // ignore when no messages.
@@ -432,7 +325,7 @@ int SrsForwarder::forward()
         }
     
         // sendout messages, all messages are freed by send_and_free_messages().
-        if ((ret = client->send_and_free_messages(msgs.msgs, count, stream_id)) != ERROR_SUCCESS) {
+        if ((ret = sdk->send_and_free_messages(msgs.msgs, count)) != ERROR_SUCCESS) {
             srs_error("forwarder messages to server failed. ret=%d", ret);
             return ret;
         }
diff --git a/trunk/src/app/srs_app_forward.hpp b/trunk/src/app/srs_app_forward.hpp
index 6d108f899..487cd2b83 100644
--- a/trunk/src/app/srs_app_forward.hpp
+++ b/trunk/src/app/srs_app_forward.hpp
@@ -43,6 +43,7 @@ class SrsRtmpClient;
 class SrsRequest;
 class SrsSource;
 class SrsKbps;
+class SrsSimpleRtmpClient;
 
 /**
 * forward the stream to other servers.
@@ -52,16 +53,13 @@ class SrsForwarder : public ISrsReusableThread2Handler
 {
 private:
     // the ep to forward, server[:port].
-    std::string _ep_forward;
-    SrsRequest* _req;
-    int stream_id;
+    std::string ep_forward;
+    SrsRequest* req;
 private:
     SrsReusableThread2* pthread;
 private:
     SrsSource* source;
-    SrsTcpClient* transport;
-    SrsKbps* kbps;
-    SrsRtmpClient* client;
+    SrsSimpleRtmpClient* sdk;
     SrsRtmpJitter* jitter;
     SrsMessageQueue* queue;
     /**
@@ -74,7 +72,7 @@ public:
     SrsForwarder(SrsSource* _source);
     virtual ~SrsForwarder();
 public:
-    virtual int initialize(SrsRequest* req, std::string ep_forward);
+    virtual int initialize(SrsRequest* r, std::string ep);
     virtual void set_queue_size(double queue_size);
 public:
     virtual int on_publish();
@@ -98,9 +96,6 @@ public:
 public:
     virtual int cycle();
 private:
-    virtual void discovery_ep(std::string& server, int& port, std::string& tc_url);
-    virtual int connect_server(std::string& ep_server, int& ep_port);
-    virtual int connect_app(std::string ep_server, int ep_port);
     virtual int forward();
 };
 
diff --git a/trunk/src/app/srs_app_rtmp_conn.cpp b/trunk/src/app/srs_app_rtmp_conn.cpp
index d3efb40b7..0301c4602 100644
--- a/trunk/src/app/srs_app_rtmp_conn.cpp
+++ b/trunk/src/app/srs_app_rtmp_conn.cpp
@@ -301,6 +301,11 @@ int SrsSimpleRtmpClient::send_and_free_messages(SrsSharedPtrMessage** msgs, int
     return client->send_and_free_messages(msgs, nb_msgs, stream_id);
 }
 
+int SrsSimpleRtmpClient::send_and_free_message(SrsSharedPtrMessage* msg)
+{
+    return client->send_and_free_message(msg, stream_id);
+}
+
 void SrsSimpleRtmpClient::set_recv_timeout(int64_t timeout)
 {
     transport->set_recv_timeout(timeout);
diff --git a/trunk/src/app/srs_app_rtmp_conn.hpp b/trunk/src/app/srs_app_rtmp_conn.hpp
index dab29ebfb..be345660d 100644
--- a/trunk/src/app/srs_app_rtmp_conn.hpp
+++ b/trunk/src/app/srs_app_rtmp_conn.hpp
@@ -90,6 +90,7 @@ public:
     virtual int recv_message(SrsCommonMessage** pmsg);
     virtual int decode_message(SrsCommonMessage* msg, SrsPacket** ppacket);
     virtual int send_and_free_messages(SrsSharedPtrMessage** msgs, int nb_msgs);
+    virtual int send_and_free_message(SrsSharedPtrMessage* msg);
 public:
     virtual void set_recv_timeout(int64_t timeout);
 };