diff --git a/src/context/mdb/mdb.go b/src/context/mdb/mdb.go
index 0b50ca8f..be0de87d 100644
--- a/src/context/mdb/mdb.go
+++ b/src/context/mdb/mdb.go
@@ -59,19 +59,27 @@ func (mdb *MDB) Start(m *ctx.Message, arg ...string) bool { // {{{
 
 // }}}
 func (mdb *MDB) Close(m *ctx.Message, arg ...string) bool { // {{{
-	if mdb.DB != nil && m.Target == mdb.Context {
+	if mdb.Context == Index {
+		return false
+	}
+
+	switch mdb.Context {
+	case m.Target:
+	case m.Source:
+	}
+
+	if mdb.DB != nil {
 		m.Log("info", nil, "%d close %s %s", m.Capi("nsource", -1)+1, m.Cap("driver"), m.Cap("source"))
 		mdb.DB.Close()
 		mdb.DB = nil
-		return true
 	}
 
-	return false
+	return true
 }
 
 // }}}
 
-var Index = &ctx.Context{Name: "mdb", Help: "内存数据库",
+var Index = &ctx.Context{Name: "mdb", Help: "数据中心",
 	Caches: map[string]*ctx.Cache{
 		"nsource": &ctx.Cache{Name: "数据源数量", Value: "0", Help: "已打开数据库的数量"},
 	},
@@ -83,7 +91,7 @@ var Index = &ctx.Context{Name: "mdb", Help: "内存数据库",
 			m.Assert(len(arg) > 2, "缺少参数") // {{{
 			m.Master, m.Target = c, c
 			m.Cap("stream", m.Cap("nsource"))
-			m.Start(arg[0], arg[1], arg[2:]...)
+			m.Start(arg[0], "数据存储", arg[2:]...)
 			return ""
 			// }}}
 		}},
diff --git a/src/context/tcp/tcp.go b/src/context/tcp/tcp.go
index 3fc6855c..8f0912b6 100644
--- a/src/context/tcp/tcp.go
+++ b/src/context/tcp/tcp.go
@@ -20,14 +20,10 @@ func (tcp *TCP) Spawn(m *ctx.Message, c *ctx.Context, arg ...string) ctx.Server
 	c.Caches = map[string]*ctx.Cache{
 		"protocol": &ctx.Cache{Name: "protocol(tcp/tcp4/tcp6)", Value: m.Conf("protocol"), Help: "监听地址"},
 		"security": &ctx.Cache{Name: "security(true/false)", Value: m.Conf("security"), Help: "加密通信"},
-		"address":  &ctx.Cache{Name: "address", Value: arg[1], Help: "监听地址"},
+		"address":  &ctx.Cache{Name: "address", Value: "", Help: "监听地址"},
 	}
 	c.Configs = map[string]*ctx.Config{}
 
-	if len(arg) > 2 {
-		m.Cap("security", arg[2])
-	}
-
 	s := new(TCP)
 	s.Context = c
 	return s
@@ -36,53 +32,65 @@ func (tcp *TCP) Spawn(m *ctx.Message, c *ctx.Context, arg ...string) ctx.Server
 
 // }}}
 func (tcp *TCP) Begin(m *ctx.Message, arg ...string) ctx.Server { // {{{
+	if m.Target == Index {
+		Pulse = m
+	}
+
 	return tcp
 }
 
 // }}}
 func (tcp *TCP) Start(m *ctx.Message, arg ...string) bool { // {{{
+	if len(arg) > 1 {
+		m.Cap("address", arg[1])
+	}
+	if len(arg) > 2 {
+		m.Cap("security", arg[2])
+	}
+
 	switch arg[0] {
 	case "dial":
 		c, e := net.Dial(m.Cap("protocol"), m.Cap("address"))
 		m.Assert(e)
 		tcp.Conn = c
+		m.Log("info", nil, "dial(%d) %v->%v", m.Capi("nclient", 1), tcp.LocalAddr(), tcp.RemoteAddr())
+		m.Cap("stream", fmt.Sprintf("%s->%s", tcp.LocalAddr(), tcp.RemoteAddr()))
 
-		m.Log("info", nil, "dial(%d) %v->%v", m.Capi("nclient"), c.LocalAddr(), c.RemoteAddr())
 		// m.Reply(c.LocalAddr().String()).Put("option", "io", c).Cmd("open")
 		return false
 	case "accept":
+		c, e := m.Data["io"].(net.Conn)
+		m.Assert(e)
+		tcp.Conn = c
+		m.Log("info", nil, "accept(%d) %v<-%v", m.Capi("nclient", 1), tcp.LocalAddr(), tcp.RemoteAddr())
+		m.Cap("stream", fmt.Sprintf("%s<-%s", tcp.LocalAddr(), tcp.RemoteAddr()))
+
+		s, e := m.Data["source"].(*ctx.Context)
+		m.Assert(e)
+		msg := m.Spawn(s).Put("option", "io", c)
+		msg.Cmd("open")
+		msg.Cap("stream", tcp.RemoteAddr().String())
+
+		if tcp.Sessions == nil {
+			tcp.Sessions = make(map[string]*ctx.Message)
+		}
+		tcp.Sessions["open"] = msg
+		msg.Name = "open"
+
+		// m.Reply(c.RemoteAddr().String())
 		return false
 	}
 
 	l, e := net.Listen(m.Cap("protocol"), m.Cap("address"))
 	m.Assert(e)
 	tcp.Listener = l
-
-	m.Log("info", nil, "listen(%d) %v", m.Capi("nlisten"), l.Addr())
+	m.Log("info", nil, "listen(%d) %v", m.Capi("nlisten", 1), l.Addr())
+	m.Cap("stream", fmt.Sprintf("%s", l.Addr()))
 
 	for {
 		c, e := l.Accept()
 		m.Assert(e)
-
-		s, i := m.Target, 0
-		m.BackTrace(func(m *ctx.Message) bool {
-			s = m.Target
-			if i++; i == 2 {
-				return false
-			}
-			return true
-		})
-
-		msg := m.Spawn(s)
-		msg.Start(fmt.Sprintf("com%d", m.Capi("nclient", 1)), c.RemoteAddr().String(), "accept", c.RemoteAddr().String())
-		msg.Log("info", nil, "accept(%d) %v<-%v", m.Capi("nclient"), c.LocalAddr(), c.RemoteAddr())
-
-		if tcp, ok := msg.Target.Server.(*TCP); ok {
-			tcp.Conn = c
-		}
-		rep := m.Reply(c.RemoteAddr().String())
-		rep.Source = msg.Target
-		rep.Put("option", "io", c).Cmd("open")
+		m.Spawn(Index).Put("option", "io", c).Put("option", "source", m.Source).Start(fmt.Sprintf("com%d", m.Capi("nclient", 1)), "网络连接", "accept", c.RemoteAddr().String())
 	}
 
 	return true
@@ -90,22 +98,33 @@ func (tcp *TCP) Start(m *ctx.Message, arg ...string) bool { // {{{
 
 // }}}
 func (tcp *TCP) Close(m *ctx.Message, arg ...string) bool { // {{{
-	if tcp.Listener != nil {
-		m.Log("info", nil, "close(%d) %v", m.Capi("nlisten", -1)+1, tcp.Listener.Addr())
-		tcp.Listener.Close()
-		return true
-	}
-	if tcp.Conn != nil {
-		tcp.Conn.Close()
-		return true
+	if tcp.Context == Index {
+		return false
 	}
 
-	return false
+	switch tcp.Context {
+	case m.Target:
+	case m.Source:
+		if tcp.Listener != nil {
+			return false
+		}
+
+	}
+
+	if tcp.Listener != nil {
+		m.Log("info", nil, "close(%d) %v", Pulse.Capi("nlisten", -1)+1, tcp.Listener.Addr())
+		tcp.Listener.Close()
+	}
+	if tcp.Conn != nil {
+		m.Log("info", nil, "close %v", tcp.Conn.LocalAddr())
+		tcp.Conn.Close()
+	}
+	return true
 }
 
 // }}}
 
-var Index = &ctx.Context{Name: "tcp", Help: "网络连接",
+var Index = &ctx.Context{Name: "tcp", Help: "网络中心",
 	Caches: map[string]*ctx.Cache{
 		"nlisten": &ctx.Cache{Name: "nlisten", Value: "0", Help: "监听数量"},
 		"nclient": &ctx.Cache{Name: "nclient", Value: "0", Help: "连接数量"},
@@ -118,14 +137,14 @@ var Index = &ctx.Context{Name: "tcp", Help: "网络连接",
 		"listen": &ctx.Command{Name: "listen [address [security]]", Help: "监听连接", Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) string {
 			switch len(arg) { // {{{
 			case 0:
-				m.Travel(m.Target, func(m *ctx.Message) bool {
+				m.Travel(nil, func(m *ctx.Message) bool {
 					if tcp, ok := m.Target.Server.(*TCP); ok && tcp.Listener != nil {
 						m.Echo("%s %v\n", m.Target.Name, tcp.Addr())
 					}
 					return true
 				})
 			default:
-				m.Start(fmt.Sprintf("pub%d", m.Capi("nlisten", 1)), arg[0], m.Meta["detail"]...)
+				m.Start(fmt.Sprintf("pub%d", m.Capi("nlisten")+1), "网络监听", m.Meta["detail"]...)
 			}
 			return ""
 			// }}}
@@ -133,14 +152,14 @@ var Index = &ctx.Context{Name: "tcp", Help: "网络连接",
 		"dial": &ctx.Command{Name: "dial [address [security]]", Help: "建立连接", Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) string {
 			switch len(arg) { // {{{
 			case 0:
-				m.Travel(m.Target, func(m *ctx.Message) bool {
+				m.Travel(nil, func(m *ctx.Message) bool {
 					if tcp, ok := m.Target.Server.(*TCP); ok && tcp.Conn != nil {
 						m.Echo("%s %v<->%v\n", m.Target.Name, tcp.LocalAddr(), tcp.RemoteAddr())
 					}
 					return true
 				})
 			default:
-				m.Start(fmt.Sprintf("com%d", m.Capi("nclient", 1)), arg[0], m.Meta["detail"]...)
+				m.Start(fmt.Sprintf("com%d", m.Capi("nclient")+1), "网络连接", m.Meta["detail"]...)
 			}
 			return ""
 			// }}}
@@ -153,9 +172,9 @@ var Index = &ctx.Context{Name: "tcp", Help: "网络连接",
 			// }}}
 		}},
 		"recv": &ctx.Command{Name: "recv size", Help: "接收消息", Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) string {
+			size, e := strconv.Atoi(arg[0])
+			m.Assert(e)
 			if tcp, ok := m.Target.Server.(*TCP); ok && tcp.Conn != nil { // {{{
-				size, e := strconv.Atoi(arg[0])
-				m.Assert(e)
 				buf := make([]byte, size)
 				tcp.Conn.Read(buf)
 				return string(buf)
@@ -174,6 +193,8 @@ var Index = &ctx.Context{Name: "tcp", Help: "网络连接",
 	},
 }
 
+var Pulse *ctx.Message
+
 func init() {
 	tcp := &TCP{}
 	tcp.Context = Index