diff --git a/src/sf_global.c b/src/sf_global.c
index ae251a5..7e33872 100644
--- a/src/sf_global.c
+++ b/src/sf_global.c
@@ -43,10 +43,10 @@ SFGlobalVariables g_sf_global_vars = {
     {0, 0}, NULL, {NULL, 0}
 };
 
-SFContext g_sf_context = {
-    {'\0'}, NULL, 0, -1, -1, 0, 0, 1, DEFAULT_WORK_THREADS, 
-    {'\0'}, {'\0'}, 0, true, true, NULL, NULL, NULL, NULL,
-    NULL, sf_task_finish_clean_up, NULL
+SFContext g_sf_context = {{'\0'}, NULL, 0,
+    {{false, sf_network_type_sock}, {false, sf_network_type_rdma}},
+    1, DEFAULT_WORK_THREADS, {'\0'}, {'\0'}, 0, true, true, NULL,
+    NULL, NULL, NULL, NULL, sf_task_finish_clean_up, NULL
 };
 
 static inline void set_config_str_value(const char *value,
@@ -411,17 +411,50 @@ int sf_load_config_ex(const char *server_name, SFContextIniConfig *config,
     return sf_load_context_from_config_ex(&g_sf_context, config);
 }
 
+static int init_network_handler(SFNetworkHandler *handler,
+        SFContext *sf_context)
+{
+    handler->ctx = sf_context;
+    handler->inner.handler = handler;
+    handler->outer.handler = handler;
+    handler->inner.is_inner = true;
+    handler->outer.is_inner = false;
+
+    if (handler->type == sf_network_type_sock) {
+        handler->inner.sock = -1;
+        handler->outer.sock = -1;
+    } else {
+    }
+
+    return 0;
+}
+
 int sf_load_context_from_config_ex(SFContext *sf_context,
         SFContextIniConfig *config)
 {
+    SFNetworkHandler *sock_handler;
+    SFNetworkHandler *rdma_handler;
     char *inner_port;
     char *outer_port;
     char *inner_bind_addr;
     char *outer_bind_addr;
     char *bind_addr;
     int port;
+    int i;
+    int result;
 
-    sf_context->inner_port = sf_context->outer_port = 0;
+    memset(sf_context->handlers, 0, sizeof(sf_context->handlers));
+    sock_handler = sf_context->handlers + SF_SOCKET_NETWORK_HANDLER_INDEX;
+    rdma_handler = sf_context->handlers + SF_RDMACM_NETWORK_HANDLER_INDEX;
+    sock_handler->type = sf_network_type_sock;
+    rdma_handler->type = sf_network_type_rdma;
+    for (i=0; i<SF_NETWORK_HANDLER_COUNT; i++) {
+        if ((result=init_network_handler(sf_context->handlers + i,
+                        sf_context)) != 0)
+        {
+            return result;
+        }
+    }
 
     inner_port = iniGetStrValue(config->ini_ctx.section_name,
             "inner_port", config->ini_ctx.context);
@@ -431,22 +464,30 @@ int sf_load_context_from_config_ex(SFContext *sf_context,
         port = iniGetIntValue(config->ini_ctx.section_name,
                 "port", config->ini_ctx.context, 0);
         if (port > 0) {
-            sf_context->inner_port = sf_context->outer_port = port;
+            sock_handler->inner.port = sock_handler->outer.port = port;
         }
     } else {
         if (inner_port != NULL) {
-            sf_context->inner_port = atoi(inner_port);
+            sock_handler->inner.port = strtol(inner_port, NULL, 10);
         }
         if (outer_port != NULL) {
-            sf_context->outer_port = atoi(outer_port);
+            sock_handler->outer.port = strtol(outer_port, NULL, 10);
         }
     }
 
-    if (sf_context->inner_port <= 0) {
-        sf_context->inner_port = config->default_inner_port;
+    if (sock_handler->inner.port <= 0) {
+        sock_handler->inner.port = config->default_inner_port;
     }
-    if (sf_context->outer_port <= 0) {
-        sf_context->outer_port = config->default_outer_port;
+    if (sock_handler->outer.port <= 0) {
+        sock_handler->outer.port = config->default_outer_port;
+    }
+
+    if (sock_handler->inner.port == sock_handler->outer.port) {
+        sock_handler->inner.enabled = false;
+        sock_handler->outer.enabled = true;
+    } else {
+        sock_handler->inner.enabled = true;
+        sock_handler->outer.enabled = true;
     }
 
     inner_bind_addr = iniGetStrValue(config->ini_ctx.section_name,
@@ -495,23 +536,25 @@ int sf_load_context_from_config_ex(SFContext *sf_context,
 void sf_context_config_to_string(const SFContext *sf_context,
         char *output, const int size)
 {
+    const SFNetworkHandler *sock_handler;
     int len;
 
+    sock_handler = sf_context->handlers + SF_SOCKET_NETWORK_HANDLER_INDEX;
     len = 0;
-    if ((sf_context->inner_port == sf_context->outer_port) &&
+    if ((sock_handler->inner.port == sock_handler->outer.port) &&
             (strcmp(sf_context->inner_bind_addr,
                     sf_context->outer_bind_addr) == 0))
     {
         len += snprintf(output + len, size - len,
                 "port=%u, bind_addr=%s",
-                sf_context->inner_port,
+                sock_handler->inner.port,
                 sf_context->inner_bind_addr);
     } else {
         len += snprintf(output + len, size - len,
                 "inner_port=%u, inner_bind_addr=%s, "
                 "outer_port=%u, outer_bind_addr=%s",
-                sf_context->inner_port, sf_context->inner_bind_addr,
-                sf_context->outer_port, sf_context->outer_bind_addr);
+                sock_handler->inner.port, sf_context->inner_bind_addr,
+                sock_handler->outer.port, sf_context->outer_bind_addr);
     }
 
     len += snprintf(output + len, size - len,
diff --git a/src/sf_service.c b/src/sf_service.c
index e844ac1..0c34faf 100644
--- a/src/sf_service.c
+++ b/src/sf_service.c
@@ -57,12 +57,6 @@ struct worker_thread_context {
     struct nio_thread_data *thread_data;
 };
 
-struct accept_thread_context {
-    SFContext *sf_context;
-    int server_sock;
-};
-
-
 int sf_init_task(struct fast_task_info *task)
 {
     task->connect_timeout = SF_G_CONNECT_TIMEOUT; //for client side
@@ -345,15 +339,16 @@ static void *worker_thread_entrance(void *arg)
     return NULL;
 }
 
-static int _socket_server(const char *bind_addr, int port, int *sock)
+int sf_create_socket_server(SFListener *listener, const char *bind_addr)
 {
     int result;
-    *sock = socketServer(bind_addr, port, &result);
-    if (*sock < 0) {
+
+    listener->sock = socketServer(bind_addr, listener->port, &result);
+    if (listener->sock < 0) {
         return result;
     }
 
-    if ((result=tcpsetserveropt(*sock, SF_G_NETWORK_TIMEOUT)) != 0) {
+    if ((result=tcpsetserveropt(listener->sock, SF_G_NETWORK_TIMEOUT)) != 0) {
         return result;
     }
 
@@ -363,57 +358,104 @@ static int _socket_server(const char *bind_addr, int port, int *sock)
 int sf_socket_server_ex(SFContext *sf_context)
 {
     int result;
+    bool dual_ports;
     const char *bind_addr;
+    SFNetworkHandler *handler;
+    SFNetworkHandler *end;
 
-    sf_context->inner_sock = sf_context->outer_sock = -1;
-    if (sf_context->outer_port == sf_context->inner_port) {
-        if (*sf_context->outer_bind_addr == '\0' ||
-                *sf_context->inner_bind_addr == '\0') {
-            bind_addr = "";
-            return _socket_server(bind_addr, sf_context->outer_port,
-                    &sf_context->outer_sock);
-        } else if (strcmp(sf_context->outer_bind_addr,
-                    sf_context->inner_bind_addr) == 0) {
-            bind_addr = sf_context->outer_bind_addr;
-            if (is_private_ip(bind_addr)) {
-                return _socket_server(bind_addr, sf_context->
-                        inner_port, &sf_context->inner_sock);
-            } else {
-                return _socket_server(bind_addr, sf_context->
-                        outer_port, &sf_context->outer_sock);
-            }
+    end = sf_context->handlers + SF_NETWORK_HANDLER_COUNT;
+    for (handler=sf_context->handlers; handler<end; handler++) {
+        if (!handler->enabled) {
+            continue;
         }
-    }
 
-    if ((result=_socket_server(sf_context->outer_bind_addr,
-                    sf_context->outer_port, &sf_context->outer_sock)) != 0)
-    {
-        return result;
-    }
+        handler->inner.enabled = false;
+        handler->outer.enabled = false;
+        if (handler->outer.port == handler->inner.port) {
+            if (*sf_context->outer_bind_addr == '\0' ||
+                    *sf_context->inner_bind_addr == '\0') {
+                bind_addr = "";
+                if ((result=handler->create_server(&handler->
+                                outer, bind_addr)) != 0)
+                {
+                    return result;
+                }
+                handler->outer.enabled = true;
+                dual_ports = false;
+            } else if (strcmp(sf_context->outer_bind_addr,
+                        sf_context->inner_bind_addr) == 0) {
+                bind_addr = sf_context->outer_bind_addr;
+                if (is_private_ip(bind_addr)) {
+                    if ((result=handler->create_server(&handler->
+                                    inner, bind_addr)) != 0)
+                    {
+                        return result;
+                    }
+                    handler->inner.enabled = true;
+                } else {
+                    if ((result=handler->create_server(&handler->
+                                    outer, bind_addr)) != 0)
+                    {
+                        return result;
+                    }
+                    handler->outer.enabled = true;
+                }
+                dual_ports = false;
+            } else {
+                dual_ports = true;
+            }
+        } else {
+            dual_ports = true;
+        }
 
-    if ((result=_socket_server(sf_context->inner_bind_addr,
-                    sf_context->inner_port, &sf_context->inner_sock)) != 0)
-    {
-        return result;
+        if (dual_ports) {
+            if ((result=handler->create_server(&handler->outer,
+                            sf_context->outer_bind_addr)) != 0)
+            {
+                return result;
+            }
+
+            if ((result=handler->create_server(&handler->inner,
+                            sf_context->inner_bind_addr)) != 0)
+            {
+                return result;
+            }
+            handler->inner.enabled = true;
+            handler->outer.enabled = true;
+        }
     }
 
     return 0;
 }
 
-void sf_socket_close_ex(SFContext *sf_context)
+void sf_close_socket_server(SFListener *listener)
 {
-    if (sf_context->inner_sock >= 0) {
-        close(sf_context->inner_sock);
-        sf_context->inner_sock = -1;
-    }
-
-    if (sf_context->outer_sock >= 0) {
-        close(sf_context->outer_sock);
-        sf_context->outer_sock = -1;
+    if (listener->sock >= 0) {
+        close(listener->sock);
+        listener->sock = -1;
     }
 }
 
-static void accept_run(struct accept_thread_context *accept_context)
+void sf_socket_close_ex(SFContext *sf_context)
+{
+    SFNetworkHandler *handler;
+    SFNetworkHandler *end;
+
+    end = sf_context->handlers + SF_NETWORK_HANDLER_COUNT;
+    for (handler=sf_context->handlers; handler<end; handler++) {
+        if (!handler->enabled) {
+            continue;
+        }
+        if (handler->outer.enabled) {
+            handler->close_server(&handler->outer);
+        }
+        if (handler->inner.enabled) {
+            handler->close_server(&handler->inner);
+        }
+    }
+}
+
+static void accept_run(SFListener *listener)
 {
     int incomesock;
     int port;
@@ -423,7 +465,7 @@ static void accept_run(struct accept_thread_context *accept_context)
 
     while (g_sf_global_vars.continue_flag) {
         sockaddr_len = sizeof(inaddr);
-        incomesock = accept(accept_context->server_sock,
+        incomesock = accept(listener->sock,
                 (struct sockaddr*)&inaddr, &sockaddr_len);
         if (incomesock < 0) { //error
             if (!(errno == EINTR || errno == EAGAIN)) {
@@ -441,8 +483,8 @@ static void accept_run(struct accept_thread_context *accept_context)
         }
         FC_SET_CLOEXEC(incomesock);
 
-        if ((task=sf_alloc_init_task(accept_context->
-                        sf_context, incomesock)) == NULL)
+        if ((task=sf_alloc_init_task(listener->handler->ctx,
+                        incomesock)) == NULL)
         {
             close(incomesock);
             continue;
@@ -451,13 +493,12 @@ static void accept_run(struct accept_thread_context *accept_context)
         getPeerIpAddPort(incomesock, task->client_ip,
                 sizeof(task->client_ip), &port);
         task->port = port;
-        task->thread_data = accept_context->sf_context->thread_data +
-            incomesock % accept_context->sf_context->work_threads;
-        if (accept_context->sf_context->accept_done_func != NULL) {
-            if (accept_context->sf_context->accept_done_func(task,
-                        inaddr.sin_addr.s_addr,
-                        accept_context->server_sock ==
-                        accept_context->sf_context->inner_sock) != 0)
+        task->thread_data = listener->handler->ctx->thread_data +
+            incomesock % listener->handler->ctx->work_threads;
+        if (listener->handler->ctx->accept_done_func != NULL) {
+            if (listener->handler->ctx->accept_done_func(
+                        task, inaddr.sin_addr.s_addr,
+                        listener->is_inner) != 0)
             {
                 close(incomesock);
                 sf_release_task(task);
@@ -472,24 +513,23 @@ static void accept_run(struct accept_thread_context *accept_context)
     }
 }
 
-static void *accept_thread_entrance(struct accept_thread_context
-        *accept_context)
+static void *accept_thread_entrance(SFListener *listener)
 {
 #ifdef OS_LINUX
     {
         char thread_name[32];
-        snprintf(thread_name, sizeof(thread_name), "%s-listen",
-                accept_context->sf_context->name);
+        snprintf(thread_name, sizeof(thread_name), "%s-%s-listen",
+                listener->handler->type == sf_network_type_sock ?
+                "sock" : "rdma", listener->handler->ctx->name);
         prctl(PR_SET_NAME, thread_name);
     }
 #endif
 
-    accept_run(accept_context);
+    accept_run(listener);
     return NULL;
 }
 
-void _accept_loop(struct accept_thread_context *accept_context,
-        const int accept_threads)
+int _accept_loop(SFListener *listener, const int accept_threads)
 {
     pthread_t tid;
     pthread_attr_t thread_attr;
@@ -497,7 +537,7 @@ void _accept_loop(struct accept_thread_context *accept_context,
     int i;
 
     if (accept_threads <= 0) {
-       return;
+        return 0;
     }
 
     if ((result=init_pthread_attr(&thread_attr, g_sf_global_vars.
@@ -505,68 +545,73 @@ void _accept_loop(struct accept_thread_context *accept_context,
     {
         logWarning("file: "__FILE__", line: %d, "
                 "init_pthread_attr fail!", __LINE__);
+        return result;
     }
-    else {
-        for (i=0; i<accept_threads; i++) {
-            if ((result=pthread_create(&tid, &thread_attr,
-                            (void * (*)(void *))accept_thread_entrance,
-                            accept_context)) != 0)
-            {
-                logError("file: "__FILE__", line: %d, "
-                        "create thread failed, startup threads: %d, "
-                        "errno: %d, error info: %s",
-                        __LINE__, i, result, strerror(result));
-                break;
-            }
-        }
 
-        pthread_attr_destroy(&thread_attr);
+    for (i=0; i<accept_threads; i++) {
+        if ((result=pthread_create(&tid, &thread_attr,
+                        (void * (*)(void *))accept_thread_entrance,
+                        listener)) != 0)
+        {
+            logError("file: "__FILE__", line: %d, "
+                    "create thread failed, startup threads: %d, "
+                    "errno: %d, error info: %s",
+                    __LINE__, i, result, strerror(result));
+            return result;
+        }
     }
+
+    pthread_attr_destroy(&thread_attr);
+    return 0;
 }
 
-void sf_accept_loop_ex(SFContext *sf_context, const bool block)
+int sf_accept_loop_ex(SFContext *sf_context, const bool blocked)
 {
-    struct accept_thread_context *accept_contexts;
-    int count;
-    int bytes;
+    SFNetworkHandler *handler;
+    SFNetworkHandler *hend;
+    SFListener *listeners[SF_NETWORK_HANDLER_COUNT * 2];
+    SFListener **listener;
+    SFListener **last;
+    SFListener **lend;
 
-    if (sf_context->outer_sock >= 0) {
-        count = 2;
+    listener = listeners;
+    hend = sf_context->handlers + SF_NETWORK_HANDLER_COUNT;
+    for (handler=sf_context->handlers; handler<hend; handler++) {
+        if (!handler->enabled) {
+            continue;
+        }
+
+        if (handler->inner.enabled) {
+            *listener++ = &handler->inner;
+        }
+        if (handler->outer.enabled) {
+            *listener++ = &handler->outer;
+        }
+    }
+
+    if (listener == listeners) {
+        logError("file: "__FILE__", line: %d, "
+                "no listener!", __LINE__);
+        return ENOENT;
+    }
+
+    last = listener - 1;
+    if (blocked) {
+        lend = listener - 1;
     } else {
-        count = 1;
+        lend = listener;
     }
 
-    bytes = sizeof(struct accept_thread_context) * count;
-    accept_contexts = (struct accept_thread_context *)fc_malloc(bytes);
-    if (accept_contexts == NULL) {
-        return;
+    for (listener=listeners; listener<lend; listener++) {
+        _accept_loop(*listener, sf_context->accept_threads);
     }
 
-    accept_contexts[0].sf_context = sf_context;
-    accept_contexts[0].server_sock = sf_context->inner_sock;
-
-    if (sf_context->outer_sock >= 0) {
-        accept_contexts[1].sf_context = sf_context;
-        accept_contexts[1].server_sock = sf_context->outer_sock;
-
-        if (sf_context->inner_sock >= 0) {
-            _accept_loop(accept_contexts, sf_context->accept_threads);
-        }
-
-        if (block) {
-            _accept_loop(accept_contexts + 1, sf_context->accept_threads - 1);
-            accept_run(accept_contexts + 1);
-        } else {
-            _accept_loop(accept_contexts + 1, sf_context->accept_threads);
-        }
-    } else {
-        if (block) {
-            _accept_loop(accept_contexts, sf_context->accept_threads - 1);
-            accept_run(accept_contexts);
-        } else {
-            _accept_loop(accept_contexts, sf_context->accept_threads);
-        }
+    if (blocked) {
+        _accept_loop(*last, sf_context->accept_threads - 1);
+        accept_run(*last);
     }
+
+    return 0;
 }
 
 #if defined(DEBUG_FLAG)
diff --git a/src/sf_service.h b/src/sf_service.h
index 8008485..b793963 100644
--- a/src/sf_service.h
+++ b/src/sf_service.h
@@ -83,13 +83,16 @@ int sf_add_slow_log_schedule(SFSlowLogContext *slowlog_ctx);
 
 void sf_set_current_time();
 
+int sf_create_socket_server(SFListener *listener, const char *bind_addr);
+void sf_close_socket_server(SFListener *listener);
+
 int sf_socket_server_ex(SFContext *sf_context);
 #define sf_socket_server() sf_socket_server_ex(&g_sf_context)
 
 void sf_socket_close_ex(SFContext *sf_context);
 #define sf_socket_close() sf_socket_close_ex(&g_sf_context)
 
-void sf_accept_loop_ex(SFContext *sf_context, const bool block);
+int sf_accept_loop_ex(SFContext *sf_context, const bool blocked);
 
 #define sf_accept_loop()  sf_accept_loop_ex(&g_sf_context, true)
 
diff --git a/src/sf_types.h b/src/sf_types.h
index 30f8b76..1f96905 100644
--- a/src/sf_types.h
+++ b/src/sf_types.h
@@ -34,6 +34,10 @@
 #define SF_SERVER_TASK_TYPE_CHANNEL_HOLDER     101   //for request idempotency
 #define SF_SERVER_TASK_TYPE_CHANNEL_USER       102   //for request idempotency
 
+#define SF_NETWORK_HANDLER_COUNT          2
+#define SF_SOCKET_NETWORK_HANDLER_INDEX   0
+#define SF_RDMACM_NETWORK_HANDLER_INDEX   1
+
 typedef int (*sf_accept_done_callback)(struct fast_task_info *task,
         const in_addr_t client_addr, const bool bInnerPort);
 typedef int (*sf_set_body_length_callback)(struct fast_task_info *task);
@@ -49,15 +53,71 @@ typedef void (*sf_release_buffer_callback)(struct fast_task_info *task);
 
 typedef int (*sf_error_handler_callback)(const int errnum);
 
+struct sf_listener;
+typedef int (*sf_create_server_callback)(struct sf_listener *listener,
+        const char *bind_addr);
+typedef void (*sf_close_server_callback)(struct sf_listener *listener);
+typedef struct fast_task_info * (*sf_accept_connection_callback)(
+        struct sf_listener *listener);
+typedef int (*sf_async_connect_server_callback)(struct fast_task_info *task);
+typedef int (*sf_connect_server_done_callback)(struct fast_task_info *task);
+typedef void (*sf_close_connection_callback)(struct fast_task_info *task);
+
+typedef int (*sf_send_data_callback)(struct fast_task_info *task,
+        bool *send_done);
+typedef int (*sf_recv_data_callback)(struct fast_task_info *task,
+        bool *recv_done);
+
+typedef enum {
+    sf_network_type_sock = 's',
+    sf_network_type_rdma = 'r'
+} SFNetworkType;
+
+struct sf_network_handler;
+typedef struct sf_listener {
+    struct sf_network_handler *handler;
+    int port;
+    bool enabled;
+    bool is_inner;
+    union {
+        int sock;  //for socket
+        void *id;  //for rdma_cm
+    };
+} SFListener;
+
+struct sf_context;
+typedef struct sf_network_handler {
+    bool enabled;
+    SFNetworkType type;
+    struct sf_context *ctx;
+
+    SFListener inner;
+    SFListener outer;
+
+    /* for server side */
+    sf_create_server_callback create_server;
+    sf_close_server_callback close_server;
+    sf_accept_connection_callback accept_connection;
+
+    /* for client side */
+    sf_async_connect_server_callback async_connect_server;
+    sf_connect_server_done_callback connect_server_done;
+
+    /* server and client both */
+    sf_close_connection_callback close_connection;
+
+    sf_send_data_callback send_data;
+    sf_recv_data_callback recv_data;
+} SFNetworkHandler;
+
 typedef struct sf_context {
     char name[64];
     struct nio_thread_data *thread_data;
     volatile int thread_count;
-    int outer_sock;
-    int inner_sock;
 
-    int outer_port;
-    int inner_port;
+    //int rdma_port_offset;
+    SFNetworkHandler handlers[SF_NETWORK_HANDLER_COUNT];
+
     int accept_threads;
     int work_threads;