diff --git a/trunk/src/kernel/srs_kernel_balance.hpp b/trunk/src/kernel/srs_kernel_balance.hpp
index 58d9ee209..1a311b335 100644
--- a/trunk/src/kernel/srs_kernel_balance.hpp
+++ b/trunk/src/kernel/srs_kernel_balance.hpp
@@ -21,8 +21,8 @@
  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#ifndef SRS_KERNEL_AAC_HPP
-#define SRS_KERNEL_AAC_HPP
+#ifndef SRS_KERNEL_BALANCE_HPP
+#define SRS_KERNEL_BALANCE_HPP
 
 /*
 #include <srs_kernel_balance.hpp>
diff --git a/trunk/src/libs/srs_lib_simple_socket.cpp b/trunk/src/libs/srs_lib_simple_socket.cpp
index 72ccbfdb6..bd5d7fa94 100644
--- a/trunk/src/libs/srs_lib_simple_socket.cpp
+++ b/trunk/src/libs/srs_lib_simple_socket.cpp
@@ -102,7 +102,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
         SrsBlockSyncSocket* skt = (SrsBlockSyncSocket*)ctx;
         srs_freep(skt);
     }
-    int srs_hijack_io_create_socket(srs_hijack_io_t ctx)
+    int srs_hijack_io_create_socket(srs_hijack_io_t ctx, srs_rtmp_t owner)
     {
         SrsBlockSyncSocket* skt = (SrsBlockSyncSocket*)ctx;
         
@@ -329,10 +329,10 @@ srs_hijack_io_t SimpleSocketStream::hijack_io()
     return io;
 }
 
-int SimpleSocketStream::create_socket()
+int SimpleSocketStream::create_socket(srs_rtmp_t owner)
 {
     srs_assert(io);
-    return srs_hijack_io_create_socket(io);
+    return srs_hijack_io_create_socket(io, owner);
 }
 
 int SimpleSocketStream::connect(const char* server_ip, int port)
diff --git a/trunk/src/libs/srs_lib_simple_socket.hpp b/trunk/src/libs/srs_lib_simple_socket.hpp
index a9ff88bb3..0ba31d1b8 100644
--- a/trunk/src/libs/srs_lib_simple_socket.hpp
+++ b/trunk/src/libs/srs_lib_simple_socket.hpp
@@ -51,7 +51,7 @@ public:
     virtual ~SimpleSocketStream();
 public:
     virtual srs_hijack_io_t hijack_io();
-    virtual int create_socket();
+    virtual int create_socket(srs_rtmp_t owner);
     virtual int connect(const char* server, int port);
 // ISrsBufferReader
 public:
diff --git a/trunk/src/libs/srs_librtmp.cpp b/trunk/src/libs/srs_librtmp.cpp
index cd09563be..8680d9e26 100644
--- a/trunk/src/libs/srs_librtmp.cpp
+++ b/trunk/src/libs/srs_librtmp.cpp
@@ -539,7 +539,7 @@ srs_rtmp_t srs_rtmp_create(const char* url)
     srs_freep(context->skt);
     context->skt = new SimpleSocketStream();
 
-    if (context->skt->create_socket() != ERROR_SUCCESS) {
+    if (context->skt->create_socket(context) != ERROR_SUCCESS) {
         // free the context and return NULL
         srs_freep(context);
         return NULL;
@@ -561,7 +561,7 @@ srs_rtmp_t srs_rtmp_create2(const char* url)
     srs_freep(context->skt);
     context->skt = new SimpleSocketStream();
     
-    if (context->skt->create_socket() != ERROR_SUCCESS) {
+    if (context->skt->create_socket(context) != ERROR_SUCCESS) {
         // free the context and return NULL
         srs_freep(context);
         return NULL;
diff --git a/trunk/src/libs/srs_librtmp.hpp b/trunk/src/libs/srs_librtmp.hpp
index 0058d3ebc..481ba0577 100644
--- a/trunk/src/libs/srs_librtmp.hpp
+++ b/trunk/src/libs/srs_librtmp.hpp
@@ -992,7 +992,7 @@ typedef void* srs_hijack_io_t;
     extern srs_hijack_io_t srs_hijack_io_get(srs_rtmp_t rtmp);
 #endif
 // define the following macro and functions in your module to hijack the io.
-// the example @see https://github.com/winlinvip/st-load
+// the example @see https://github.com/ossrs/srs-bench
 // which use librtmp but use its own io(use st also).
 #ifdef SRS_HIJACK_IO
     /**
@@ -1006,9 +1006,10 @@ typedef void* srs_hijack_io_t;
     extern void srs_hijack_io_destroy(srs_hijack_io_t ctx);
     /**
     * create socket, not connect yet.
+    * @param owner, the rtmp context which create this socket.
     * @return 0, success; otherswise, failed.
     */
-    extern int srs_hijack_io_create_socket(srs_hijack_io_t ctx);
+    extern int srs_hijack_io_create_socket(srs_hijack_io_t ctx, srs_rtmp_t owner);
     /**
     * connect socket at server_ip:port.
     * @return 0, success; otherswise, failed.
diff --git a/trunk/src/protocol/srs_http_stack.hpp b/trunk/src/protocol/srs_http_stack.hpp
index ff9140804..2dc2121d6 100644
--- a/trunk/src/protocol/srs_http_stack.hpp
+++ b/trunk/src/protocol/srs_http_stack.hpp
@@ -29,6 +29,9 @@
 */
 #include <srs_core.hpp>
 
+// default http listen port.
+#define SRS_DEFAULT_HTTP_PORT 80
+
 #if !defined(SRS_EXPORT_LIBRTMP)
 
 #include <map>
@@ -68,9 +71,6 @@ class ISrsHttpResponseWriter;
 // for ead all of http body, read each time.
 #define SRS_HTTP_READ_CACHE_BYTES 4096
 
-// default http listen port.
-#define SRS_DEFAULT_HTTP_PORT 80
-
 // for http parser macros
 #define SRS_CONSTS_HTTP_OPTIONS HTTP_OPTIONS
 #define SRS_CONSTS_HTTP_GET HTTP_GET