diff --git a/Makefile b/Makefile
index c694a03d..b0c5f84c 100644
--- a/Makefile
+++ b/Makefile
@@ -28,7 +28,7 @@ all : \
   service/localcast.so \
   service/socket.so \
   luaclib/skynet.so \
-  luaclib/socketbuffer.so \
+  luaclib/socketdriver.so \
   luaclib/int64.so \
   luaclib/mcast.so \
   luaclib/bson.so \
@@ -90,8 +90,8 @@ service/client.so : service-src/service_client.c
 service/socket.so : service-src/service_socket.c
 	gcc $(CFLAGS) $(SHARED) $^ -o $@ -Iskynet-src
 
-luaclib/socketbuffer.so : lualib-src/lua-socket.c | luaclib
-	gcc $(CFLAGS) $(SHARED) -Iluacompat $^ -o $@ -Iskynet-src
+luaclib/socketdriver.so : lualib-src/lua-socket.c | luaclib
+	gcc $(CFLAGS) $(SHARED) -Iluacompat $^ -o $@ -Iskynet-src -Iservice-src
 
 luaclib/int64.so : lua-int64/int64.c | luaclib
 	gcc $(CFLAGS) $(SHARED) -Iluacompat -O2 $^ -o $@ 
diff --git a/lualib-src/lua-socket.c b/lualib-src/lua-socket.c
index 08fc7a1a..ab4ec6b8 100644
--- a/lualib-src/lua-socket.c
+++ b/lualib-src/lua-socket.c
@@ -1,250 +1,465 @@
 #include <stdlib.h>
 #include <string.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <assert.h>
 
 #include <lua.h>
 #include <lauxlib.h>
 
 #include "luacompat52.h"
+#include "skynet_socket.h"
+#include "service_lua.h"
+
+#define BACKLOG 32
+// 2 ** 12 == 4096
+#define LARGE_PAGE_NODE 12
+
+struct buffer_node {
+	char * msg;
+	int sz;
+	struct buffer_node *next;
+};
 
 struct socket_buffer {
 	int size;
-	int head;
-	int tail;
+	int offset;
+	struct buffer_node *head;
+	struct buffer_node *tail;
 };
 
-static struct socket_buffer *
-new_buffer(lua_State *L, int sz) {
-	struct socket_buffer * buffer = lua_newuserdata(L, sizeof(*buffer) + sz);
-	buffer->size = sz;
-	buffer->head = 0;
-	buffer->tail = 0;
-
-	return buffer;
-}
-
-static void
-copy_buffer(struct socket_buffer * dest, struct socket_buffer * src) {
-	char * ptr = (char *)(src+1);
-	if (src->tail >= src->head) {
-		int sz = src->tail - src->head;
-		memcpy(dest+1, ptr+ src->head, sz);
-		dest->tail = sz;
-	} else {
-		char * d = (char *)(dest+1);
-		int part = src->size - src->head;
-		memcpy(d, ptr + src->head, part);
-		memcpy(d + part, ptr , src->tail);
-		dest->tail = src->tail + part;
-	}
-}
-
-static void
-append_buffer(struct socket_buffer * buffer, char * msg, int sz) {
-	char * dst = (char *)(buffer + 1);
-	if (sz + buffer->tail < buffer->size) {
-		memcpy(dst + buffer->tail , msg, sz);
-		buffer->tail += sz;
-	} else {
-		int part = buffer->size - buffer->tail;
-		memcpy(dst + buffer->tail , msg, part);
-		memcpy(dst, msg + part, sz - part);
-		buffer->tail = sz - part;
-	}
-}
-
 static int
-lpop(lua_State *L) {
-	struct socket_buffer * buffer = lua_touserdata(L, 1);
-	if (buffer == NULL) {
-		return 0;
-	}
-	int sz = luaL_checkinteger(L, 2);
-	int	bytes = buffer->tail - buffer->head;
-	if (bytes < 0) {
-		bytes += buffer->size;
-	}
-
-	if (sz > bytes || bytes == 0) {
-		lua_pushnil(L);
-		lua_pushinteger(L, bytes);
-		return 2;
-	}
-
-	if (sz == 0) {
-		sz = bytes;
-	}
-
-	char * ptr = (char *)(buffer+1);
-	if (buffer->size - buffer->head >=sz) {
-		lua_pushlstring(L, ptr + buffer->head, sz);
-		buffer->head+=sz;
-	} else {
-		luaL_Buffer b;
-		luaL_buffinit(L, &b);
-		luaL_addlstring(&b, ptr + buffer->head, buffer->size - buffer->head);
-		buffer->head = sz - (buffer->size - buffer->head);
-		luaL_addlstring(&b, ptr, buffer->head);
-		luaL_pushresult(&b);
-	}
-
-	bytes -= sz;
-
-	lua_pushinteger(L,bytes);
-	if (bytes == 0) {
-		buffer->head = buffer->tail = 0;
-	}
-	
-	return 2;
-}
-
-static inline int
-check_sep(struct socket_buffer *buffer, int from, const char * sep, int sz) {
-	const char * ptr = (const char *)(buffer+1);
+lfreepool(lua_State *L) {
+	struct buffer_node * pool = lua_touserdata(L, 1);
+	int sz = lua_rawlen(L,1) / sizeof(*pool);
 	int i;
 	for (i=0;i<sz;i++) {
-		int index = from + i;
-		if (index >= buffer->size) {
-			index = 0;
-		}
-		if (ptr[index] != sep[i]) {
-			return 0;
-		}
-	}
-	return 1;
-}
-
-static int
-lreadline(lua_State *L) {
-	struct socket_buffer * buffer = lua_touserdata(L, 1);
-	if (buffer == NULL) {
-		return 0;
-	}
-	size_t len = 0;
-	const char *sep = luaL_checklstring(L,2,&len);
-	int read = !lua_toboolean(L,3);
-	int	bytes = buffer->tail - buffer->head;
-
-	if (bytes < 0) {
-		bytes += buffer->size;
-	}
-
-	int i;
-	for (i=0;i<=bytes-(int)len;i++) {
-		int index = buffer->head + i;
-		if (index >= buffer->size) {
-			index -= buffer->size;
-		}
-		if (check_sep(buffer, index, sep, (int)len)) {
-			if (read == 0) {
-				lua_pushboolean(L,1);
-			} else {
-				if (i==0) {
-					lua_pushlstring(L, "", 0);
-				} else {
-					const char * ptr = (const char *)(buffer+1);
-					if (--index < 0) {
-						index = buffer->size -1;
-					}
-					if (index < buffer->head) {
-						luaL_Buffer b;
-						luaL_buffinit(L, &b);
-						luaL_addlstring(&b, ptr + buffer->head, buffer->size-buffer->head);
-						luaL_addlstring(&b, ptr, index+1);
-						luaL_pushresult(&b);
-					} else {
-						lua_pushlstring(L, ptr + buffer->head, index-buffer->head+1);
-					}
-					++index;
-				}
-				index+=len;
-				if (index >= buffer->size) {
-					index-=buffer->size;
-				}
-				buffer->head = index;
-			}
-			return 1;
+		struct buffer_node *node = &pool[i];
+		if (node->msg) {
+			free(node->msg);
+			node->msg = NULL;
 		}
 	}
 	return 0;
 }
 
 static int
-lpush(lua_State *L) {
-	struct socket_buffer * buffer = lua_touserdata(L, 1);
-	int bytes = 0;
-	if (buffer) {
-		bytes = buffer->tail - buffer->head;
-		if (bytes < 0) {
-			bytes += buffer->size;
+lnewpool(lua_State *L, int sz) {
+	struct buffer_node * pool = lua_newuserdata(L, sizeof(struct buffer_node) * sz);
+	int i;
+	for (i=0;i<sz;i++) {
+		pool[i].msg = NULL;
+		pool[i].sz = 0;
+		pool[i].next = &pool[i+1];
+	}
+	pool[sz-1].next = NULL;
+	if (luaL_newmetatable(L, "buffer_pool")) {
+		lua_pushcfunction(L, lfreepool);
+		lua_setfield(L, -2, "__gc");
+	}
+	lua_setmetatable(L, -2);
+	return 1;
+};
+
+static int
+lnewbuffer(lua_State *L) {
+	struct socket_buffer * sb = lua_newuserdata(L, sizeof(*sb));	
+	sb->size = 0;
+	sb->offset = 0;
+	sb->head = NULL;
+	sb->tail = NULL;
+	
+	return 1;
+}
+
+/*
+	userdata send_buffer
+	table pool
+	lightuserdata msg
+	int size
+
+	return size
+ */
+static int
+lpushbuffer(lua_State *L) {
+	struct socket_buffer *sb = lua_touserdata(L,1);
+	if (sb == NULL) {
+		return luaL_error(L, "need buffer object at param 1");
+	}
+	char * msg = lua_touserdata(L,3);
+	if (msg == NULL) {
+		return luaL_error(L, "need message block at param 3");
+	}
+	int pool_index = 2;
+	luaL_checktype(L,pool_index,LUA_TTABLE);
+	int sz = luaL_checkinteger(L,4);
+	lua_rawgeti(L,pool_index,1);
+	struct buffer_node * free_node = lua_touserdata(L,-1);	// sb poolt msg size free_node
+	lua_pop(L,1);
+	if (free_node == NULL) {
+		int tsz = lua_rawlen(L,pool_index);
+		if (tsz == 0)
+			tsz++;
+		int size = 8;
+		if (tsz <= LARGE_PAGE_NODE-3) {
+			size <<= tsz;
+		} else {
+			size <<= LARGE_PAGE_NODE-3;
+		}
+		lnewpool(L, size);	
+		free_node = lua_touserdata(L,-1);
+		lua_rawseti(L, pool_index, tsz+1);
+	}
+	lua_pushlightuserdata(L, free_node->next);	
+	lua_rawseti(L, pool_index, 1);	// sb poolt msg size
+	free_node->msg = msg;
+	free_node->sz = sz;
+	free_node->next = NULL;
+
+	if (sb->head == NULL) {
+		assert(sb->tail == NULL);
+		sb->head = sb->tail = free_node;
+	} else {
+		sb->tail->next = free_node;
+		sb->tail = free_node;
+	}
+	sb->size += sz;
+
+	lua_pushinteger(L, sb->size);
+
+	return 1;
+}
+
+static void
+return_free_node(lua_State *L, int pool, struct socket_buffer *sb) {
+	struct buffer_node *free_node = sb->head;
+	sb->head = free_node->next;
+	if (sb->head == NULL) {
+		sb->tail = NULL;
+	}
+	lua_rawgeti(L,pool,1);
+	free_node->next = lua_touserdata(L,-1);
+	lua_pop(L,1);
+	free(free_node->msg);
+	free_node->msg = NULL;
+
+	free_node->sz = 0;
+	lua_pushlightuserdata(L, free_node);
+	lua_rawseti(L, pool, 1);
+}
+
+static void
+pop_lstring(lua_State *L, struct socket_buffer *sb, int sz, int skip) {
+	struct buffer_node * current = sb->head;
+	if (sz < current->sz - sb->offset) {
+		lua_pushlstring(L, current->msg + sb->offset, sz-skip);
+		sb->offset+=sz;
+		return;
+	}
+	if (sz == current->sz - sb->offset) {
+		lua_pushlstring(L, current->msg + sb->offset, sz-skip);
+		sb->offset = 0;
+		return_free_node(L,2,sb);
+		return;
+	}
+
+	luaL_Buffer b;
+	luaL_buffinit(L, &b);
+	for (;;) {
+		int bytes = current->sz - sb->offset;
+		if (bytes >= sz) {
+			if (sz > skip) {
+				luaL_addlstring(&b, current->msg + sb->offset, sz - skip);
+			} 
+			sb->offset += sz;
+			if (bytes == sz) {
+				return_free_node(L,2,sb);
+				sb->offset = 0;
+			}
+			break;
+		}
+		luaL_addlstring(&b, current->msg + sb->offset, (sz - skip < bytes) ? sz - skip : bytes);
+		return_free_node(L,2,sb);
+		sb->offset = 0;
+		sz-=bytes;
+		if (sz==0)
+			break;
+		current = sb->head;
+		assert(current);
+	}
+	luaL_pushresult(&b);
+}
+
+/*
+	userdata send_buffer
+	table pool
+	integer sz
+ */
+static int
+lpopbuffer(lua_State *L) {
+	struct socket_buffer * sb = lua_touserdata(L, 1);
+	if (sb == NULL) {
+		return luaL_error(L, "Need buffer object at param 1");
+	}
+	luaL_checktype(L,2,LUA_TTABLE);
+	int sz = luaL_checkinteger(L,3);
+	if (sb->size < sz || sz == 0) {
+		lua_pushnil(L);
+	} else {
+		pop_lstring(L,sb,sz,0);
+		sb->size -= sz;
+	}
+	lua_pushinteger(L, sb->size);
+
+	return 2;
+}
+
+/*
+	userdata send_buffer
+	table pool
+ */
+static int
+lclearbuffer(lua_State *L) {
+	struct socket_buffer * sb = lua_touserdata(L, 1);
+	if (sb == NULL) {
+		return luaL_error(L, "Need buffer object at param 1");
+	}
+	luaL_checktype(L,2,LUA_TTABLE);
+	while(sb->head) {
+		return_free_node(L,2,sb);
+	}
+	return 0;
+}
+
+static int
+lreadall(lua_State *L) {
+	struct socket_buffer * sb = lua_touserdata(L, 1);
+	if (sb == NULL) {
+		return luaL_error(L, "Need buffer object at param 1");
+	}
+	luaL_checktype(L,2,LUA_TTABLE);
+	luaL_Buffer b;
+	luaL_buffinit(L, &b);
+	while(sb->head) {
+		struct buffer_node *current = sb->head;
+		luaL_addlstring(&b, current->msg + sb->offset, current->sz - sb->offset);
+		return_free_node(L,2,sb);
+	}
+	luaL_pushresult(&b);
+	return 1;
+}
+
+static int
+ldrop(lua_State *L) {
+	void * msg = lua_touserdata(L,1);
+	luaL_checkinteger(L,2);
+	free(msg);
+	return 0;
+}
+
+static bool
+check_sep(struct buffer_node * node, int from, const char *sep, int seplen) {
+	for (;;) {
+		int sz = node->sz - from;
+		if (sz >= seplen) {
+			return memcmp(node->msg+from,sep,seplen) == 0;
+		}
+		if (sz > 0) {
+			if (memcmp(node->msg + from, sep, sz)) {
+				return false;
+			}
+		}
+		node = node->next;
+		sep += sz;
+		seplen -= sz;
+		from = 0;
+	}
+}
+
+/*
+	userdata send_buffer
+	table pool , nil for check
+	string sep
+ */
+static int
+lreadline(lua_State *L) {
+	struct socket_buffer * sb = lua_touserdata(L, 1);
+	if (sb == NULL) {
+		return luaL_error(L, "Need buffer object at param 1");
+	}
+	// only check
+	bool check = !lua_istable(L, 2);
+	size_t seplen = 0;
+	const char *sep = luaL_checklstring(L,3,&seplen);
+	int i;
+	struct buffer_node *current = sb->head;
+	if (current == NULL)
+		return 0;
+	int from = sb->offset;
+	int bytes = current->sz - from;
+	for (i=0;i<=sb->size - (int)seplen;i++) {
+		if (check_sep(current, from, sep, seplen)) {
+			if (check) {
+				lua_pushboolean(L,true);
+			} else {
+				pop_lstring(L, sb, i+seplen, seplen);
+				sb->size -= i+seplen;
+			}
+			return 1;
+		}
+		++from;
+		--bytes;
+		if (bytes == 0) {
+			current = current->next;
+			from = 0;
+			if (current == NULL)
+				break;
+			bytes = current->sz;
 		}
 	}
-	void * msg = lua_touserdata(L,2);
-	if (msg == NULL) {
-		lua_settop(L,1);
-		lua_pushinteger(L,bytes);
-		return 2;
-	}
+	return 0;
+}
 
-	int sz = luaL_checkinteger(L,3);
-
-	if (buffer == NULL) {
-		struct socket_buffer * nbuf = new_buffer(L, sz * 2);
-		append_buffer(nbuf, msg, sz);
-	} else if (sz + bytes >= buffer->size) {
-		struct socket_buffer * nbuf = new_buffer(L, (sz + bytes) * 2);
-		copy_buffer(nbuf, buffer);
-		append_buffer(nbuf, msg, sz);
-	} else {
-		lua_settop(L,1);
-		append_buffer(buffer, msg, sz);
-	}
-	lua_pushinteger(L, sz + bytes);
+static int
+lstr2p(lua_State *L) {
+	size_t sz = 0;
+	const char * str = luaL_checklstring(L,1,&sz);
+	void *ptr = malloc(sz);
+	memcpy(ptr, str, sz);
+	lua_pushlightuserdata(L, ptr);
+	lua_pushinteger(L, (int)sz);
 	return 2;
 }
 
+// for skynet socket
+
+/*
+	lightuserdata msg
+	integer size
+
+	return type n1 n2 ptr_or_string
+*/
 static int
 lunpack(lua_State *L) {
-	int * msg = lua_touserdata(L,1);
-	int sz = luaL_checkinteger(L,2);
-	if (msg == NULL || sz < 4) {
-		return luaL_error(L, "Invalid socket message");
+	struct skynet_socket_message *message = lua_touserdata(L,1);
+	int size = luaL_checkinteger(L,2);
+
+	lua_pushinteger(L, message->type);
+	lua_pushinteger(L, message->id);
+	lua_pushinteger(L, message->ud);
+	if (message->buffer == NULL) {
+		lua_pushlstring(L, (char *)(message+1),size - sizeof(*message));
+	} else {
+		lua_pushlightuserdata(L, message->buffer);
 	}
-	lua_pushinteger(L, *msg);
-	lua_pushlightuserdata(L, msg+1);
-	lua_pushinteger(L, sz - 4);
-	return 3;
+	return 4;
 }
 
 static int
-lpack(lua_State *L) {
-	int fd = luaL_checkinteger(L, 1);
-	const void *buffer;
-	size_t sz;
+lconnect(lua_State *L) {
+	const char * host = luaL_checkstring(L,1);
+	int port = luaL_checkinteger(L,2);
+	struct skynet_context * ctx = lua_touserdata(L, lua_upvalueindex(1));
+	int id = skynet_socket_connect(ctx, host, port);
+	lua_pushinteger(L, id);
+
+	return 1;
+}
+
+static int
+lclose(lua_State *L) {
+	int id = luaL_checkinteger(L,1);
+	struct skynet_context * ctx = lua_touserdata(L, lua_upvalueindex(1));
+	skynet_socket_close(ctx, id);
+	return 0;
+}
+
+static int
+llisten(lua_State *L) {
+	const char * host = luaL_checkstring(L,1);
+	int port = luaL_checkinteger(L,2);
+	int backlog = luaL_optinteger(L,3,BACKLOG);
+	struct skynet_context * ctx = lua_touserdata(L, lua_upvalueindex(1));
+	int id = skynet_socket_listen(ctx, host,port,backlog);
+
+	lua_pushinteger(L,id);
+	return 1;
+}
+
+static int
+lsend(lua_State *L) {
+	struct skynet_context * ctx = lua_touserdata(L, lua_upvalueindex(1));
+	int id = luaL_checkinteger(L, 1);
+	void *buffer;
+	int sz;
 	if (lua_isuserdata(L,2)) {
 		buffer = lua_touserdata(L,2);
-		sz = luaL_checkinteger(L, 3);
+		sz = luaL_checkinteger(L,3);
 	} else {
-		buffer = luaL_checklstring(L,2,&sz);
+		size_t len = 0;
+		const char * str =  luaL_checklstring(L, 2, &len);
+		buffer = malloc(len);
+		memcpy(buffer, str, len);
+		sz = (int)len;
 	}
-	int * b = malloc(4 + sz);
-	*b = fd;
-	memcpy(b+1, buffer, sz);
-	lua_pushlightuserdata(L, b);
-	lua_pushinteger(L, 4+sz);
-	return 2;
+	int err = skynet_socket_send(ctx, id, buffer, sz);
+	lua_pushboolean(L, err);
+	return 1;
+}
+
+static int
+lbind(lua_State *L) {
+	struct skynet_context * ctx = lua_touserdata(L, lua_upvalueindex(1));
+	int fd = luaL_checkinteger(L, 1);
+	int id = skynet_socket_bind(ctx,fd);
+	lua_pushinteger(L,id);
+	return 1;
+}
+
+static int
+laccept(lua_State *L) {
+	struct skynet_context * ctx = lua_touserdata(L, lua_upvalueindex(1));
+	int id = luaL_checkinteger(L, 1);
+	skynet_socket_accept(ctx,id);
+	return 0;
 }
 
 int
-luaopen_socketbuffer(lua_State *L) {
+luaopen_socketdriver(lua_State *L) {
 	luaL_checkversion(L);
 	luaL_Reg l[] = {
-		{ "push", lpush },
-		{ "pop", lpop },
+		{ "buffer", lnewbuffer },
+		{ "push", lpushbuffer },
+		{ "pop", lpopbuffer },
+		{ "drop", ldrop },
+		{ "readall", lreadall },
+		{ "clear", lclearbuffer },
 		{ "readline", lreadline },
+		{ "str2p", lstr2p },
+
 		{ "unpack", lunpack },
-		{ "pack", lpack },
 		{ NULL, NULL },
 	};
 	luaL_newlib(L,l);
+	luaL_Reg l2[] = {
+		{ "connect", lconnect },
+		{ "close", lclose },
+		{ "listen", llisten },
+		{ "send", lsend },
+		{ "bind", lbind },
+		{ "accept", laccept },
+		{ NULL, NULL },
+	};
+	lua_getfield(L, LUA_REGISTRYINDEX, "skynet_lua");
+	struct snlua *lua = lua_touserdata(L,-1);
+	if (lua == NULL || lua->ctx == NULL) {
+		return luaL_error(L, "Init skynet context first");
+	}
+	assert(lua->L == L);
+	lua_pop(L,1);
+
+	lua_pushlightuserdata(L, lua->ctx);
+	luaL_setfuncs(L,l2,1);
+
 	return 1;
 }
diff --git a/lualib/socket.lua b/lualib/socket.lua
index 65065bee..8937dd85 100644
--- a/lualib/socket.lua
+++ b/lualib/socket.lua
@@ -1,273 +1,240 @@
-local buffer = require "socketbuffer"
+local driver = require "socketdriver"
 local skynet = require "skynet"
-local table = table
-local next = next
 local assert = assert
-local coroutine = coroutine
-local type = type
 
-local READBUF = {}	-- fd:buffer
-local READREQUEST = {}	-- fd:request_size
-local READSESSION = {}	-- fd:session
-local READLOCK = {}	-- fd:queue(session)
-local READTHREAD= {} -- fd:thread
-local CLOSED = {} -- fd:true
+local socket = {}	-- api
+local buffer_pool = {}	-- store all message buffer object
+local socket_pool = setmetatable( -- store all socket object
+	{},
+	{ __gc = function(p)
+		for id,v in pairs(p) do
+			driver.close(id)
+			-- don't need clear v.buffer, because buffer pool will be free at the end
+			p[id] = nil
+		end
+	end
+	}
+)
 
-local selfaddr = skynet.self()
-local sockets = assert(skynet.localname ".socket")
+local socket_message = {}
 
-local function response(session)
-	skynet.redirect(selfaddr , 0, "response", session, "")
+local function wakeup(s)
+	local co = s.co
+	if co then
+		s.co = nil
+		skynet.wakeup(co)
+	end
+end
+
+local function suspend(s)
+	assert(not s.co)
+	s.co = coroutine.running()
+	skynet.wait()
+end
+
+-- read skynet_socket.h for these macro
+-- SKYNET_SOCKET_TYPE_DATA = 1
+socket_message[1] = function(id, size, data)
+	local s = socket_pool[id]
+	if s == nil then
+		print("socket: drop package from " .. id)
+		driver.drop(data)
+		return
+	end
+
+	local sz = driver.push(s.buffer, buffer_pool, data, size)
+	local rr = s.read_required
+	local rrt = type(rr)
+	if rrt == "number" then
+		-- read size
+		if sz >= rr then
+			s.read_required = nil
+			wakeup(s)
+		end
+	elseif rrt == "string" then
+		-- read line
+		if driver.readline(s.buffer,nil,rr) then
+			s.read_required = nil
+			wakeup(s)
+		end
+	end
+end
+
+-- SKYNET_SOCKET_TYPE_CONNECT = 2
+socket_message[2] = function(id, _ , addr)
+	local s = socket_pool[id]
+	if s == nil then
+		return
+	end
+	-- log remote addr
+	s.connected = true
+	wakeup(s)
+end
+
+-- SKYNET_SOCKET_TYPE_CLOSE = 3
+socket_message[3] = function(id)
+	local s = socket_pool[id]
+	if s == nil then
+		return
+	end
+	s.connected = false
+	wakeup(s)
+end
+
+-- SKYNET_SOCKET_TYPE_ACCEPT = 4
+socket_message[4] = function(id, newid, addr)
+	local s = socket_pool[id]
+	if s == nil then
+		driver.close(newid)
+		return
+	end
+	skynet.fork(s.callback, newid, addr)
+end
+
+-- SKYNET_SOCKET_TYPE_ERROR = 5
+socket_message[5] = function(id)
+	print("error on ", id)
+	local s = socket_pool[id]
+	if s == nil then
+		return
+	end
+	s.connected = false
+	wakeup(s)
 end
 
 skynet.register_protocol {
-	name = "client",
-	id = 3,	-- PTYPE_CLIENT
-	pack = buffer.pack,
-	unpack = buffer.unpack,
-	dispatch = function (_, _, fd, msg, sz)
-		local qsz = READREQUEST[fd]
-		local buf = READBUF[fd]
-		local bsz
-		if sz == 0 then
-			CLOSED[fd] = true
-		else
-			buf,bsz = buffer.push(buf, msg, sz)
-			READBUF[fd] = buf
-		end
-		local session = READSESSION[fd]
-		if qsz == nil or session == nil then
-			return
-		end
-		if sz > 0 then
-			if type(qsz) == "number" then
-				if qsz > bsz then
-					return
-				end
-			else
-				-- request readline
-				if buffer.readline(buf, qsz, true) == nil then
-					return
-				end
-			end
-		end
-
-		response(session)
-		READSESSION[fd] = nil
+	name = "socket",
+	id = 6,	-- PTYPE_SOCKET
+	unpack = driver.unpack,
+	dispatch = function (_, _, t, n1, n2, data)
+		socket_message[t](n1,n2,data)
 	end
 }
 
-skynet.register_protocol {
-	name = "system",
-	id = 4, -- PTYPE_SYSTEM
-	pack = skynet.pack,
-	unpack = function (...) return ... end,
-	dispatch = function (session, addr, msg, sz)
-		fd, t, sz = skynet.unpack(msg,sz)
-		assert(addr == selfaddr, "PTYPE_SYSTEM message must send by self")
-		if t > 0 then	-- lock request when t == 0
-			-- request bytes or readline
-			local buf = READBUF[fd]
-			if CLOSED[fd] then
-				skynet.ret()
-				return
-			end
-			local _,bsz = buffer.push(buf)
-			if t == 1 then
-				-- sz is size
-				if bsz >= sz then
-					skynet.ret()
-					return
-				end
-			elseif t == 2 then
-				-- sz is sep
-				if buffer.readline(buf, sz, true) then -- don't real read
-					skynet.ret()
-					return
-				end
-			end
-			READSESSION[fd] = session
-		end
+local function connect(id)
+	local s = {
+		id = id,
+		buffer = driver.buffer(),
+		connected = false,
+		read_require = false,
+		co = false,
+	}
+	socket_pool[id] = s
+	suspend(s)
+	if s.connected then
+		return id
 	end
-}
-
-local socket = {}
+end
 
 function socket.open(addr, port)
-	local cmd = "open" .. " " .. (port and (addr..":"..port) or addr)
-	local r = skynet.call(sockets, "text", cmd)
-	if r == "" then
-		return nil,  cmd .. " failed"
-	end
-	local fd = tonumber(r)
-	READBUF[fd] = true
-	CLOSED[fd] = nil
-	return fd
-end
-
-function socket.bind(sock)
-	local r = skynet.call(sockets, "text", "bind " .. tonumber(sock))
-	if r == "" then
-		error("stdin bind failed")
-	end
-	local fd = tonumber(r)
-	READBUF[fd] = true
-	CLOSED[fd] = nil
-	return fd
+	local id = driver.connect(addr,port)
+	return connect(id)
 end
 
 function socket.stdin()
-	return socket.bind(1)
+	local id = driver.bind(1)
+	return connect(id)
+end
+
+function socket.accept(id)
+	driver.accept(id)
+	return connect(id)
 end
 
 function socket.close(fd)
-	socket.lock(fd)
-	skynet.call(sockets, "text", "close", fd)
-	READBUF[fd] = nil
-	READLOCK[fd] = nil
-	CLOSED[fd] = nil
+--	socket.lock(fd)
+	local s = socket_pool[id]
+	if s == nil then
+		return
+	end
+	if s.connected then
+		driver.close(s.id)
+		suspend(s)
+	end
+	if s.buffer then
+		driver.clear(s.buffer)
+	end
+	socket_pool[id] = nil
 end
 
-function socket.read(fd, sz)
-	local buf = assert(READBUF[fd])
-	local str, bytes = buffer.pop(buf,sz)
-	if str then
-		return str
-	end
-
-	if CLOSED[fd] then
-		READBUF[fd] = nil
-		CLOSED[fd] = nil
-		str = buffer.pop(buf, bytes)
-		return nil, str
-	end
-
-	READREQUEST[fd] = sz
-	skynet.call(selfaddr, "system",fd,1,sz)	-- singal size 1
-	READREQUEST[fd] = nil
-
-	buf = READBUF[fd]
-
-	str, bytes = buffer.pop(buf,sz)
-	if str then
-		return str
-	end
-
-	if CLOSED[fd] then
-		READBUF[fd] = nil
-		CLOSED[fd] = nil
-		str = buffer.pop(buf, bytes)
-		return nil, str
-	end
-end
-
-function socket.readall(fd)
-	local buf = assert(READBUF[fd])
-	if CLOSED[fd] then
-		CLOSED[fd] = nil
-		READBUF[fd] = nil
-		if buf == nil then
-			return ""
-		end
-		local _, bytes = buffer.push(buf)
-		local ret = buffer.pop(buf, bytes)
+function socket.read(id, sz)
+	local s = socket_pool[id]
+	assert(s)
+	local ret = driver.pop(s.buffer, buffer_pool, sz)
+	if ret then
 		return ret
 	end
-	READREQUEST[fd] = math.huge
-	skynet.call(selfaddr, "system",fd,3)	-- singal readall
-	READREQUEST[fd] = nil
-	assert(CLOSED[fd])
-	buf = READBUF[fd]
-	READBUF[fd] = nil
-	CLOSED[fd] = nil
-	if buf == nil then
-		return ""
-	end
-	local _, bytes = buffer.push(buf)
-	local ret = buffer.pop(buf, bytes)
-	return ret
-end
-
-function socket.readline(fd, sep)
-	local buf = assert(READBUF[fd])
-	local str = buffer.readline(buf,sep)
-	if str then
-		return str
+	if not s.connected then
+		return false, driver.readall(s.buffer, buffer_pool)
 	end
 
-	if CLOSED[fd] then
-		READBUF[fd] = nil
-		CLOSED[fd] = nil
-		local _, bytes = buffer.push(buf)
-		str = buffer.pop(buf, bytes)
-		return nil, str
-	end
-
-	READREQUEST[fd] = sep
-	skynet.call(selfaddr, "system",fd,2,sep)	-- singal sep 2
-	READREQUEST[fd] = nil
-
-	buf = READBUF[fd]
-	str = buffer.readline(buf,sep)
-	if str then
-		return str
-	end
-
-	if CLOSED[fd] then
-		READBUF[fd] = nil
-		CLOSED[fd] = nil
-		local _, bytes = buffer.push(buf)
-		str = buffer.pop(buf, bytes)
-		return nil, str
-	end
-end
-
-function socket.write(fd, msg, sz)
-	if CLOSED[fd] or not READBUF[fd] then
-		return
-	end
-	skynet.send(sockets, "client", fd, msg, sz)
-	return true
-end
-
-function socket.invalid(fd)
-	return CLOSED[fd] or not READBUF[fd]
-end
-
-function socket.lock(fd)
-	if CLOSED[fd] or not READBUF[fd] then
-		return
-	end
-	local locked = READTHREAD[fd]
-	if locked then
-		-- lock fd
-		local session = skynet.genid()
-		local q = READLOCK[fd]
-		if q == nil then
-			READLOCK[fd] = { session }
-		else
-			table.insert(q, session)
-		end
-
-		skynet.redirect(selfaddr , 0, "system", session, skynet.pack(fd,0))
-		coroutine.yield("CALL",session)
+	assert(not s.read_required)
+	s.read_required = sz
+	suspend(s)
+	ret = driver.pop(s.buffer, buffer_pool, sz)
+	if ret then
+		return ret
 	else
-		READTHREAD[fd] = true
+		return false, driver.readall(s.buffer, buffer_pool)
 	end
 end
 
+function socket.readall(id)
+	local s = socket_pool[id]
+	assert(s)
+	if not s.connected then
+		return driver.readall(s.buffer, buffer_pool)
+	end
+	assert(not s.read_required)
+	s.read_required = true
+	suspend(s)
+	assert(s.connected == false)
+	return driver.readall(s.buffer, buffer_pool)
+end
+
+function socket.readline(id, sep)
+	sep = sep or "\n"
+	local s = socket_pool[id]
+	assert(s)
+	local ret = driver.readline(s.buffer, buffer_pool, sep)
+	if ret then
+		return ret
+	end
+	if not s.connected then
+		return false, driver.readall(s.buffer, buffer_pool)
+	end
+	assert(not s.read_required)
+	s.read_required = sep
+	suspend(s)
+	if s.connected then
+		return driver.readline(s.buffer, buffer_pool, sep)
+	else
+		return false, driver.readall(s.buffer, buffer_pool)
+	end
+end
+
+socket.write = assert(driver.send)
+
+function socket.invalid(id)
+	return socket_pool[id] == nil
+end
+
+function socket.listen(host,port,func)
+	local id = driver.listen(host,port)
+	local s = {
+		id = id,
+		connected = true,
+		callback = func
+	}
+	socket_pool[id] = s
+	return id
+end
+
+function socket.lock(id)
+end
+
 function socket.unlock(fd)
-	READTHREAD[fd] = nil
-	local q = READLOCK[fd]
-	if q then
-		if q[1] then
-			READTHREAD[fd] = true
-			response(q[1])
-			table.remove(q,1)
-		else
-			READLOCK[fd] = nil
-		end
-	end
+
 end
 
 return socket
diff --git a/service/testsocket.lua b/service/testsocket.lua
new file mode 100644
index 00000000..8c452e2e
--- /dev/null
+++ b/service/testsocket.lua
@@ -0,0 +1,22 @@
+local skynet = require "skynet"
+local socket = require "socket"
+
+local function accepter(id, addr)
+	print("connect from " .. addr .. " " .. id)
+	socket.accept(id)
+	socket.write(id, "Hello Skynet\n")
+	while true do
+		local str = socket.readline(id,"\n")
+		if str then
+			socket.write(id, str .. "\n")
+		else
+			socket.close(id)
+			print("closed " .. id)
+			return
+		end
+	end
+end
+
+skynet.start(function()
+	socket.listen("127.0.0.1", 8000, accepter)
+end)
diff --git a/skynet-src/skynet_socket.c b/skynet-src/skynet_socket.c
index e1b4dd19..177f124d 100644
--- a/skynet-src/skynet_socket.c
+++ b/skynet-src/skynet_socket.c
@@ -128,3 +128,9 @@ skynet_socket_close(struct skynet_context *ctx, int id) {
 	uint32_t source = skynet_context_handle(ctx);
 	socket_server_close(SOCKET_SERVER, source, id);
 }
+
+void 
+skynet_socket_accept(struct skynet_context *ctx, int id) {
+	uint32_t source = skynet_context_handle(ctx);
+	socket_server_accept(SOCKET_SERVER, source, id);
+}
diff --git a/skynet-src/skynet_socket.h b/skynet-src/skynet_socket.h
index 6fa9c746..97bf219a 100644
--- a/skynet-src/skynet_socket.h
+++ b/skynet-src/skynet_socket.h
@@ -3,11 +3,11 @@
 
 struct skynet_context;
 
-#define SKYNET_SOCKET_TYPE_DATA 0
-#define SKYNET_SOCKET_TYPE_CONNECT 1
-#define SKYNET_SOCKET_TYPE_CLOSE 2
-#define SKYNET_SOCKET_TYPE_ACCEPT 3
-#define SKYNET_SOCKET_TYPE_ERROR 4
+#define SKYNET_SOCKET_TYPE_DATA 1
+#define SKYNET_SOCKET_TYPE_CONNECT 2
+#define SKYNET_SOCKET_TYPE_CLOSE 3
+#define SKYNET_SOCKET_TYPE_ACCEPT 4
+#define SKYNET_SOCKET_TYPE_ERROR 5
 
 struct skynet_socket_message {
 	int type;
@@ -26,5 +26,6 @@ int skynet_socket_listen(struct skynet_context *ctx, const char *host, int port,
 int skynet_socket_connect(struct skynet_context *ctx, const char *host, int port);
 int skynet_socket_bind(struct skynet_context *ctx, int fd);
 void skynet_socket_close(struct skynet_context *ctx, int id);
+void skynet_socket_accept(struct skynet_context *ctx, int id);
 
 #endif
diff --git a/skynet-src/socket_server.c b/skynet-src/socket_server.c
index 302f1baf..0e02ffa0 100644
--- a/skynet-src/socket_server.c
+++ b/skynet-src/socket_server.c
@@ -25,6 +25,7 @@
 #define SOCKET_TYPE_CONNECTED 4
 #define SOCKET_TYPE_HALFCLOSE 5
 #define SOCKET_TYPE_BIND 6
+#define SOCKET_TYPE_NOTACCEPT 7
 
 #define MAX_SOCKET (1<<MAX_SOCKET_P)
 
@@ -89,6 +90,11 @@ struct request_bind {
 	uintptr_t opaque;
 };
 
+struct request_accept {
+	int id;
+	uintptr_t opaque;
+};
+
 struct request_package {
 	uint8_t header[8];	// 6 bytes dummy
 	union {
@@ -98,6 +104,7 @@ struct request_package {
 		struct request_close close;
 		struct request_listen listen;
 		struct request_bind bind;
+		struct request_accept accept;
 	} u;
 };
 
@@ -190,7 +197,9 @@ force_close(struct socket_server *ss, struct socket *s, struct socket_message *r
 		FREE(tmp);
 	}
 	s->head = s->tail = NULL;
-	sp_del(ss->event_fd, s->fd);
+	if (s->type != SOCKET_TYPE_NOTACCEPT) {
+		sp_del(ss->event_fd, s->fd);
+	}
 	if (s->type != SOCKET_TYPE_BIND) {
 		close(s->fd);
 	}
@@ -214,13 +223,15 @@ socket_server_release(struct socket_server *ss) {
 }
 
 static struct socket *
-new_fd(struct socket_server *ss, int id, int fd, uintptr_t opaque) {
+new_fd(struct socket_server *ss, int id, int fd, uintptr_t opaque, bool add) {
 	struct socket * s = &ss->slot[id % MAX_SOCKET];
 	assert(s->type == SOCKET_TYPE_RESERVE);
 
-	if (sp_add(ss->event_fd, fd, s)) {
-		s->type = SOCKET_TYPE_INVALID;
-		return NULL;
+	if (add) {
+		if (sp_add(ss->event_fd, fd, s)) {
+			s->type = SOCKET_TYPE_INVALID;
+			return NULL;
+		}
 	}
 
 	s->id = id;
@@ -276,7 +287,7 @@ open_socket(struct socket_server *ss, struct request_open * request, struct sock
 		goto _failed;
 	}
 
-	ns = new_fd(ss, id, sock, request->opaque);
+	ns = new_fd(ss, id, sock, request->opaque, true);
 	if (ns == NULL) {
 		close(sock);
 		goto _failed;
@@ -341,7 +352,9 @@ static int
 send_socket(struct socket_server *ss, struct request_send * request, struct socket_message *result) {
 	int id = request->id;
 	struct socket * s = &ss->slot[id % MAX_SOCKET];
-	if (s->type == SOCKET_TYPE_INVALID || s->id != id || s->type == SOCKET_TYPE_HALFCLOSE) {
+	if (s->type == SOCKET_TYPE_INVALID || s->id != id 
+		|| s->type == SOCKET_TYPE_HALFCLOSE
+		|| s->type == SOCKET_TYPE_NOTACCEPT) {
 		FREE(request->buffer);
 		return -1;
 	}
@@ -415,7 +428,7 @@ listen_socket(struct socket_server *ss, struct request_listen * request, struct
 	if (listen(listen_fd, request->backlog) == -1) {
 		goto _failed;
 	}
-	struct socket *s = new_fd(ss, id, listen_fd, request->opaque);
+	struct socket *s = new_fd(ss, id, listen_fd, request->opaque, true);
 	if (s == NULL) {
 		goto _failed;
 	}
@@ -466,7 +479,7 @@ bind_socket(struct socket_server *ss, struct request_bind *request, struct socke
 	result->id = id;
 	result->opaque = request->opaque;
 	result->ud = 0;
-	struct socket *s = new_fd(ss, id, request->fd, request->opaque);
+	struct socket *s = new_fd(ss, id, request->fd, request->opaque, true);
 	if (s == NULL) {
 		result->data = NULL;
 		return SOCKET_ERROR;
@@ -477,6 +490,27 @@ bind_socket(struct socket_server *ss, struct request_bind *request, struct socke
 	return SOCKET_OPEN;
 }
 
+static int
+accept_socket(struct socket_server *ss, struct request_accept *request, struct socket_message *result) {
+	int id = request->id;
+	result->id = id;
+	result->opaque = request->opaque;
+	result->ud = 0;
+	result->data = NULL;
+	struct socket *s = &ss->slot[id % MAX_SOCKET];
+	if (s->type != SOCKET_TYPE_NOTACCEPT || s->id !=id) {
+		return SOCKET_ERROR;
+	}
+	if (sp_add(ss->event_fd, s->fd, s)) {
+		s->type = SOCKET_TYPE_INVALID;
+		return SOCKET_ERROR;
+	}
+	s->type = SOCKET_TYPE_CONNECTED;
+	s->opaque = request->opaque;
+	result->data = "accept";
+	return SOCKET_OPEN;
+}
+
 static void
 block_readpipe(int pipefd, void *buffer, int sz) {
 	for (;;) {
@@ -506,6 +540,8 @@ ctrl_cmd(struct socket_server *ss, struct socket_message *result) {
 	block_readpipe(fd, buffer, len);
 	// ctrl command only exist in local fd, so don't worry about endian.
 	switch (type) {
+	case 'A':
+		return accept_socket(ss,(struct request_accept *)buffer, result);
 	case 'B':
 		return bind_socket(ss,(struct request_bind *)buffer, result);
 	case 'L':
@@ -618,15 +654,15 @@ report_accept(struct socket_server *ss, struct socket *s, struct socket_message
 		return 0;
 	}
 	sp_nonblocking(client_fd);
-	struct socket *ns = new_fd(ss, id, client_fd, s->opaque);
+	struct socket *ns = new_fd(ss, id, client_fd, s->opaque, false);
 	if (ns == NULL) {
 		close(client_fd);
 		return 0;
 	}
-	ns->type = SOCKET_TYPE_CONNECTED;
+	ns->type = SOCKET_TYPE_NOTACCEPT;
 	result->opaque = s->opaque;
-	result->id = id;
-	result->ud = s->id;
+	result->id = s->id;
+	result->ud = id;
 	result->data = NULL;
 
 	void * sin_addr = (u.s.sa_family == AF_INET) ? (void*)&u.v4.sin_addr : (void *)&u.v6.sin6_addr;
@@ -785,3 +821,12 @@ socket_server_bind(struct socket_server *ss, uintptr_t opaque, int fd) {
 	return id;
 }
 
+void 
+socket_server_accept(struct socket_server *ss, uintptr_t opaque, int id) {
+	struct request_package request;
+	request.u.accept.id = id;
+	request.u.accept.opaque = opaque;
+	send_request(ss, &request, 'A', sizeof(request.u.accept));
+}
+
+
diff --git a/skynet-src/socket_server.h b/skynet-src/socket_server.h
index 6d4ac10c..f1cb7d28 100644
--- a/skynet-src/socket_server.h
+++ b/skynet-src/socket_server.h
@@ -25,6 +25,7 @@ int socket_server_poll(struct socket_server *, struct socket_message *result);
 
 void socket_server_exit(struct socket_server *);
 void socket_server_close(struct socket_server *, uintptr_t opaque, int id);
+void socket_server_accept(struct socket_server *, uintptr_t opaque, int id);
 
 // return -1 when error
 int socket_server_send(struct socket_server *, int id, const void * buffer, int sz);