diff --git a/src/contexts/ctx.go b/src/contexts/ctx.go
index 1aca8448..3678be1a 100644
--- a/src/contexts/ctx.go
+++ b/src/contexts/ctx.go
@@ -280,6 +280,8 @@ type Message struct {
 	messages []*Message
 	message  *Message
 	root     *Message
+
+	Remote chan bool
 }
 
 func (m *Message) Code() int { // {{{
@@ -654,20 +656,14 @@ func (m *Message) CallBack(sync bool, cb func(msg *Message) (sub *Message), arg
 		return m.Call(cb, arg...)
 	}
 
-	wait := make(chan bool)
-
+	wait := make(chan *Message)
 	go m.Call(func(sub *Message) *Message {
 		msg := cb(sub)
-		m.Log("lock", "before done %v", arg)
-		wait <- true
-		m.Log("lock", "after done %v", arg)
+		wait <- m
 		return msg
 	}, arg...)
 
-	m.Log("lock", "before wait %v", arg)
-	<-wait
-	m.Log("lock", "after wait %v", arg)
-	return m
+	return <-wait
 }
 
 // }}}
@@ -2887,10 +2883,12 @@ func Start(args ...string) {
 		m.target.Begin(m)
 	}
 
+	Pulse.Sess("tcp", "tcp")
 	Pulse.Sess("nfs", "nfs")
 	Pulse.Sess("lex", "lex")
 	Pulse.Sess("yac", "yac")
 	Pulse.Sess("cli", "cli")
+
 	Pulse.Sess("aaa", "aaa")
 	Pulse.Sess("log", "log")
 
diff --git a/src/contexts/nfs/nfs.go b/src/contexts/nfs/nfs.go
index 627f401b..dc5dce44 100644
--- a/src/contexts/nfs/nfs.go
+++ b/src/contexts/nfs/nfs.go
@@ -37,9 +37,12 @@ type NFS struct {
 	paths []string
 	io    net.Conn
 
+	send chan *ctx.Message
+	recv chan *ctx.Message
+	hand map[int]*ctx.Message
+
 	*bufio.Reader
 	*bufio.Writer
-	send   map[int]*ctx.Message
 	target *ctx.Context
 	cli    *ctx.Message
 
@@ -546,12 +549,10 @@ func (nfs *NFS) Spawn(m *ctx.Message, c *ctx.Context, arg ...string) ctx.Server
 		c.Configs = map[string]*ctx.Config{}
 	} else {
 		c.Caches = map[string]*ctx.Cache{
-			"nbytes": &ctx.Cache{Name: "消息发送字节", Value: "0", Help: "消息发送字节"},
 			"nsend":  &ctx.Cache{Name: "消息发送数量", Value: "0", Help: "消息发送数量"},
 			"nrecv":  &ctx.Cache{Name: "消息接收数量", Value: "0", Help: "消息接收数量"},
-			"target": &ctx.Cache{Name: "消息接收模块", Value: "ssh", Help: "消息接收模块"},
-			"result": &ctx.Cache{Name: "前一条指令执行结果", Value: "", Help: "前一条指令执行结果"},
-			"sessid": &ctx.Cache{Name: "会话令牌", Value: "", Help: "会话令牌"},
+			"nread":  &ctx.Cache{Name: "nread", Value: "0", Help: "nread"},
+			"nwrite": &ctx.Cache{Name: "nwrite", Value: "0", Help: "nwrite"},
 		}
 		c.Configs = map[string]*ctx.Config{}
 	}
@@ -673,143 +674,97 @@ func (nfs *NFS) Start(m *ctx.Message, arg ...string) bool { // {{{
 		return false
 	}
 
+	m.Cap("stream", m.Option("stream"))
 	nfs.io = m.Optionv("io").(net.Conn)
-	bio := bufio.NewScanner(nfs.io)
-	for bio.Scan() {
-		m.Log("info", "recv: %s", bio.Text())
-	}
-
-	return false
-	m.Sess("nfs", m)
-
-	nfs.Message = m
-	if _, ok := m.Data["io"]; ok {
-		m.Cap("stream", m.Source().Name)
-		// m.Sess("aaa", "aaa").Cmd("login", "demo", "demo")
-		m.Options("stdio", false)
-
-		// nfs.io = socket.(io.ReadWriteCloser)
-		nfs.Reader = bufio.NewReader(nfs.io)
-		nfs.Writer = bufio.NewWriter(nfs.io)
-
-		nfs.send = make(map[int]*ctx.Message)
-		nfs.target = m.Target()
-		if target, ok := m.Data["target"]; ok {
-			nfs.target = target.(*ctx.Context)
-		}
-
-		var msg *ctx.Message
-
-		nfs.Caches["target"] = &ctx.Cache{Name: "target", Value: "", Help: "文件名"}
-
-		nsend := ""
+	nfs.hand = map[int]*ctx.Message{}
+	nfs.send = make(chan *ctx.Message, 10)
+	nfs.recv = make(chan *ctx.Message, 10)
 
+	go func() {
 		for {
-			line, e := nfs.Reader.ReadString('\n')
-			if msg == nil {
-				msg = m.Sess("ssh")
-				m.Cap("target", msg.Target().Name)
-			}
-
-			if e == io.EOF {
-				msg.Cmd("close")
-			}
-			m.Assert(e)
-
-			if line = strings.TrimSpace(line); len(line) > 0 {
-				ls := strings.SplitN(line, ":", 2)
-				ls[0] = strings.TrimSpace(ls[0])
-				ls[1], e = url.QueryUnescape(strings.TrimSpace(ls[1]))
-				m.Assert(e)
-
-				switch ls[0] {
-				case "detail":
-					msg.Add("detail", ls[1])
-				case "result":
-					msg.Add("result", ls[1])
-				case "nsend":
-					nsend = ls[1]
-				default:
-					msg.Add("option", ls[0], ls[1])
+			select {
+			case msg := <-nfs.send:
+				head, body := "detail", "option"
+				if msg.Hand {
+					head, body = "result", "append"
+					send_code := msg.Option("send_code")
+					msg.Append("send_code", send_code)
+					m.Log("info", "%s recv: %v %v", msg.Option("recv_code"), msg.Meta[head], msg.Meta[body])
+				} else {
+					m.Log("info", "%d send: %v %v", m.Capi("nsend", 1), msg.Meta[head], msg.Meta[body])
+					msg.Meta["detail"] = msg.Meta["detail"][1:]
+					nfs.hand[m.Capi("nsend")] = msg
+					msg.Option("send_code", m.Capi("nsend"))
 				}
-				continue
-			}
 
-			if msg.Has("detail") {
-				msg.Log("info", "%d recv", m.Capi("nrecv", 1))
-				msg.Log("info", "detail: %v", msg.Meta["detail"])
-				msg.Log("info", "option: %v", msg.Meta["option"])
-				msg.Options("stdio", false)
-				msg.Option("nsend", nsend)
-
-				func() {
-					cmd := msg
-					nsends := nsend
-					cmd.Call(func(sub *ctx.Message) *ctx.Message {
-						for _, v := range sub.Meta["result"] {
-							_, e := fmt.Fprintf(nfs.Writer, "result: %s\n", url.QueryEscape(v))
-							sub.Assert(e)
-						}
-
-						sub.Append("nsend", nsends)
-						for _, k := range sub.Meta["append"] {
-							for _, v := range sub.Meta[k] {
-								_, e := fmt.Fprintf(nfs.Writer, "%s: %s\n", k, url.QueryEscape(v))
-								sub.Assert(e)
-							}
-						}
-
-						sub.Log("info", "%d recv", sub.Optioni("nsend"))
-						sub.Log("info", "result: %v", sub.Meta["result"])
-						sub.Log("info", "append: %v", sub.Meta["append"])
-
-						_, e := fmt.Fprintf(nfs.Writer, "\n")
-						sub.Assert(e)
-						e = nfs.Writer.Flush()
-						sub.Assert(e)
-
-						if sub.Has("io") {
-							if f, ok := sub.Data["io"].(io.ReadCloser); ok {
-								io.Copy(nfs.Writer, f)
-								nfs.Writer.Flush()
-								f.Close()
-							}
-						}
-						return sub
-					})
-				}()
-
-			} else {
-				msg.Meta["append"] = msg.Meta["option"]
-				delete(msg.Meta, "option")
-
-				msg.Log("info", "%s send", nsend)
-				msg.Log("info", "result: %v", msg.Meta["result"])
-				msg.Log("info", "append: %v", msg.Meta["append"])
-
-				n, e := strconv.Atoi(nsend)
-				m.Assert(e)
-				send := nfs.send[n]
-				send.Copy(msg, "result")
-				send.Copy(msg, "append")
-
-				if send.Has("io") {
-					if f, ok := send.Data["io"].(io.WriteCloser); ok {
-						io.CopyN(f, nfs.Reader, int64(send.Appendi("size")))
-						f.Close()
+				for _, v := range msg.Meta[head] {
+					n, e := fmt.Fprintf(nfs.io, "%s: %s\n", head, url.QueryEscape(v))
+					m.Assert(e)
+					m.Capi("nwrite", n)
+				}
+				for _, k := range msg.Meta[body] {
+					for _, v := range msg.Meta[k] {
+						n, e := fmt.Fprintf(nfs.io, "%s: %s\n", url.QueryEscape(k), url.QueryEscape(v))
+						m.Assert(e)
+						m.Capi("nwrite", n)
 					}
 				}
 
-				send.Back(send)
+				n, e := fmt.Fprintf(nfs.io, "\n")
+				m.Assert(e)
+				m.Capi("nwrite", n)
+			}
+		}
+	}()
+
+	go func() {
+		bio := bufio.NewScanner(nfs.io)
+		var e error
+		for msg, head, body := m.Spawn(), "", ""; bio.Scan(); {
+			line := bio.Text()
+			m.Capi("nread", len(line)+1)
+			if len(line) == 0 {
+
+				if head == "detail" {
+					m.Log("info", "%d recv: %v %v", m.Capi("nrecv", 1), msg.Meta[head], msg.Meta[body])
+					msg.Option("recv_code", m.Cap("nrecv"))
+					nfs.recv <- msg
+				} else {
+					m.Log("info", "%d send: %v %v", msg.Appendi("send_code"), msg.Meta[head], msg.Meta[body])
+					h := nfs.hand[msg.Appendi("send_code")]
+					h.Copy(msg, "result").Copy(msg, "append")
+					h.Remote <- true
+				}
+				msg = m.Spawn()
+				continue
 			}
 
-			nsend = ""
-			msg = nil
+			word := strings.Split(line, ": ")
+			word[0], e = url.QueryUnescape(word[0])
+			m.Assert(e)
+			word[1], e = url.QueryUnescape(word[1])
+			m.Assert(e)
+			switch word[0] {
+			case "detail":
+				head, body = "detail", "option"
+				msg.Add(word[0], word[1])
+			case "result":
+				head, body = "result", "append"
+				msg.Add(word[0], word[1])
+			default:
+				msg.Add(body, word[0], word[1])
+			}
+		}
+	}()
+
+	for {
+		select {
+		case msg := <-nfs.recv:
+			nfs.send <- msg.Cmd()
 		}
-		return true
 	}
 
-	return false
+	return true
 }
 
 // }}}
@@ -1319,7 +1274,7 @@ var Index = &ctx.Context{Name: "nfs", Help: "存储中心",
 
 		"listen": &ctx.Command{Name: "listen args...", Help: "启动文件服务, args: 参考tcp模块, listen命令的参数", Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) {
 			if _, ok := m.Target().Server.(*NFS); m.Assert(ok) { //{{{
-				m.Find("tcp").Call(func(com *ctx.Message) *ctx.Message {
+				m.Sess("tcp").Call(func(com *ctx.Message) *ctx.Message {
 					sub := com.Spawn(c)
 					sub.Start(fmt.Sprintf("file%d", m.Capi("nfile", 1)), "远程文件")
 					return sub
@@ -1329,7 +1284,7 @@ var Index = &ctx.Context{Name: "nfs", Help: "存储中心",
 		}},
 		"dial": &ctx.Command{Name: "dial args...", Help: "连接文件服务, args: 参考tcp模块, dial命令的参数", Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) {
 			if _, ok := m.Target().Server.(*NFS); m.Assert(ok) { //{{{
-				m.Find("tcp").Call(func(com *ctx.Message) *ctx.Message {
+				m.Sess("tcp").Call(func(com *ctx.Message) *ctx.Message {
 					sub := com.Spawn(c)
 					sub.Start(fmt.Sprintf("file%d", m.Capi("nfile", 1)), "远程文件")
 					return sub
@@ -1338,111 +1293,10 @@ var Index = &ctx.Context{Name: "nfs", Help: "存储中心",
 			// }}}
 		}},
 		"send": &ctx.Command{Name: "send [file] args...", Help: "连接文件服务, args: 参考tcp模块, dial命令的参数", Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) {
-			if nfs, ok := m.Target().Server.(*NFS); m.Assert(ok) { // {{{
-				m.Log("fuck", "%v %v", arg, nfs.io)
-				nfs.io.Write([]byte(arg[0]))
-				return
-				if m.Has("nrecv") {
-					if len(arg) > 1 && arg[0] == "file" {
-						info, e := os.Stat(arg[1])
-						m.Assert(e)
-						m.Append("name", info.Name())
-						m.Append("size", info.Size())
-						m.Append("time", info.ModTime())
-						m.Append("mode", info.Mode())
-
-						f, e := os.Open(arg[1])
-						m.Assert(e)
-						m.Put("append", "io", f)
-					}
-
-				} else {
-					nfs.send[m.Optioni("nsend", m.Capi("nsend", 1))] = m
-
-					if len(arg) > 1 && arg[0] == "file" {
-						info, e := os.Stat(arg[1])
-						m.Assert(e)
-						m.Option("name", info.Name())
-						m.Option("size", info.Size())
-						m.Option("time", info.ModTime())
-						m.Option("mode", info.Mode())
-
-						n, e := fmt.Fprintf(nfs.Writer, "detail: recv\n")
-						m.Capi("nbytes", n)
-						m.Assert(e)
-					}
-					for _, v := range arg {
-						n, e := fmt.Fprintf(nfs.Writer, "detail: %v\n", v)
-						m.Capi("nbytes", n)
-						m.Assert(e)
-					}
-
-					for _, k := range m.Meta["option"] {
-						if k == "args" {
-							continue
-						}
-						for _, v := range m.Meta[k] {
-							n, e := fmt.Fprintf(nfs.Writer, "%s: %s\n", k, v)
-							m.Capi("nbytes", n)
-							m.Assert(e)
-						}
-					}
-					m.Log("info", "%d send", m.Optioni("nsend"))
-					m.Log("info", "detail: %v", m.Meta["detail"])
-					m.Log("info", "option: %v", m.Meta["option"])
-
-					n, e := fmt.Fprintf(nfs.Writer, "\n")
-					m.Capi("nbytes", n)
-					m.Assert(e)
-					nfs.Writer.Flush()
-
-					if len(arg) > 1 && arg[0] == "file" {
-						f, e := os.Open(arg[1])
-						m.Assert(e)
-						defer f.Close()
-						_, e = io.Copy(nfs.Writer, f)
-					}
-				}
-			} // }}}
-		}},
-		"recv": &ctx.Command{Name: "recv [file] args...", Help: "连接文件服务, args: 参考tcp模块, dial命令的参数", Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) {
-			if nfs, ok := m.Target().Server.(*NFS); m.Assert(ok) { // {{{
-				if m.Has("nrecv") {
-					if len(arg) > 1 && arg[0] == "file" {
-						f, e := os.Create(arg[1])
-						m.Assert(e)
-						defer f.Close()
-						io.CopyN(f, nfs.Reader, int64(m.Optioni("size")))
-					}
-
-					return
-				}
-
-				nfs.send[m.Optioni("nrecv", m.Capi("nsend", 1))] = m
-
-				if len(arg) > 1 && arg[0] == "file" {
-					f, e := os.Create(arg[1])
-					m.Assert(e)
-					m.Put("option", "io", f)
-
-					fmt.Fprintf(nfs.Writer, "detail: send\n")
-				}
-
-				for _, v := range arg {
-					fmt.Fprintf(nfs.Writer, "detail: %v\n", v)
-				}
-
-				for _, k := range m.Meta["option"] {
-					if k == "args" {
-						continue
-					}
-					for _, v := range m.Meta[k] {
-						fmt.Fprintf(nfs.Writer, "%s: %s\n", k, v)
-					}
-				}
-
-				fmt.Fprintf(nfs.Writer, "\n")
-				nfs.Writer.Flush()
+			if nfs, ok := m.Target().Server.(*NFS); m.Assert(ok) && nfs.io != nil { // {{{
+				m.Remote = make(chan bool, 1)
+				nfs.send <- m
+				<-m.Remote
 			} // }}}
 		}},
 	},
diff --git a/src/contexts/tcp/tcp.go b/src/contexts/tcp/tcp.go
index a76216ad..c37efcba 100644
--- a/src/contexts/tcp/tcp.go
+++ b/src/contexts/tcp/tcp.go
@@ -70,7 +70,7 @@ func (tcp *TCP) Start(m *ctx.Message, arg ...string) bool { // {{{
 		tcp.Conn = c
 
 		m.Log("info", "%s accept %s", m.Cap("nclient"),
-			m.Append("stream", m.Cap("stream", fmt.Sprintf("%s<-%s", tcp.LocalAddr(), tcp.RemoteAddr()))))
+			m.Option("stream", m.Cap("stream", fmt.Sprintf("%s<-%s", tcp.LocalAddr(), tcp.RemoteAddr()))))
 		m.Put("option", "io", tcp.Conn).Back(m)
 		return false
 	default: