update doc and fix vistor -> visitor

README.md

@@ -11,6 +11,7 @@ frp is a fast reverse proxy to help you expose a local server behind a NAT or fi
 ## Table of Contents
 
 <!-- vim-markdown-toc GFM -->
+
 * [What can I do with frp?](#what-can-i-do-with-frp)
 * [Status](#status)
 * [Architecture](#architecture)
@@ -20,6 +21,7 @@ frp is a fast reverse proxy to help you expose a local server behind a NAT or fi
     * [Forward DNS query request](#forward-dns-query-request)
     * [Forward unix domain socket](#forward-unix-domain-socket)
     * [Expose your service in security](#expose-your-service-in-security)
+    * [P2P Mode](#p2p-mode)
     * [Connect website through frpc's network](#connect-website-through-frpcs-network)
 * [Features](#features)
     * [Configuration File](#configuration-file)
@@ -242,9 +244,9 @@ Configure frps same as above.
   server_addr = x.x.x.x
   server_port = 7000
 
-  [secret_ssh_vistor]
+  [secret_ssh_visitor]
   type = stcp
-  role = vistor
+  role = visitor
   server_name = secret_ssh
   sk = abcdefg
   bind_addr = 127.0.0.1
@@ -255,6 +257,54 @@ Configure frps same as above.
 
   `ssh -oPort=6000 test@127.0.0.1`
 
+### P2P Mode
+
+**xtcp** is designed for transmitting a large amount of data directly between two client.
+
+Now it can't penetrate all types of NAT devices. You can try **stcp** if **xtcp** doesn't work.
+
+1. Configure a udp port for xtcp:
+
+  ```ini
+  bind_udp_port = 7001
+  ```
+
+2. Start frpc, forward ssh port and `remote_port` is useless:
+
+  ```ini
+  # frpc.ini
+  [common]
+  server_addr = x.x.x.x
+  server_port = 7000
+
+  [p2p_ssh]
+  type = xtcp
+  sk = abcdefg
+  local_ip = 127.0.0.1
+  local_port = 22
+  ```
+
+3. Start another frpc in which you want to connect this ssh server:
+
+  ```ini
+  # frpc.ini
+  [common]
+  server_addr = x.x.x.x
+  server_port = 7000
+
+  [p2p_ssh_visitor]
+  type = xtcp
+  role = visitor
+  server_name = p2p_ssh
+  sk = abcdefg
+  bind_addr = 127.0.0.1
+  bind_port = 6000
+  ```
+
+4. Connect to server in LAN by ssh assuming that username is test:
+
+  `ssh -oPort=6000 test@127.0.0.1`
+
 ### Connect website through frpc's network
 
 Configure frps same as above.
@@ -550,7 +600,7 @@ plugin_http_passwd = abc
 * Direct reverse proxy, like haproxy.
 * Load balance to different service in frpc.
 * Frpc can directly be a webserver for static files.
-* P2p communicate by make udp hole to penetrate NAT.
+* P2p communicate by making udp hole to penetrate NAT.
 * kubernetes ingress support.
 
 

README_zh.md

@@ -9,6 +9,7 @@ frp 是一个可用于内网穿透的高性能的反向代理应用，支持 tcp
 ## 目录
 
 <!-- vim-markdown-toc GFM -->
+
 * [frp 的作用](#frp-的作用)
 * [开发状态](#开发状态)
 * [架构](#架构)
@@ -18,6 +19,7 @@ frp 是一个可用于内网穿透的高性能的反向代理应用，支持 tcp
     * [转发 DNS 查询请求](#转发-dns-查询请求)
     * [转发 Unix域套接字](#转发-unix域套接字)
     * [安全地暴露内网服务](#安全地暴露内网服务)
+    * [点对点内网穿透](#点对点内网穿透)
     * [通过 frpc 所在机器访问外网](#通过-frpc-所在机器访问外网)
 * [功能说明](#功能说明)
     * [配置文件](#配置文件)
@@ -246,10 +248,10 @@ frps 的部署步骤同上。
   server_addr = x.x.x.x
   server_port = 7000
 
-  [secret_ssh_vistor]
+  [secret_ssh_visitor]
   type = stcp
   # stcp 的访问者
-  role = vistor
+  role = visitor
   # 要访问的 stcp 代理的名字
   server_name = secret_ssh
   sk = abcdefg
@@ -262,6 +264,60 @@ frps 的部署步骤同上。
 
   `ssh -oPort=6000 test@127.0.0.1`
 
+### 点对点内网穿透
+
+frp 提供了一种新的代理类型 **xtcp** 用于应对在希望传输大量数据且流量不经过服务器的场景。
+
+使用方式同 **stcp** 类似，需要在两边都部署上 frpc 用于建立直接的连接。
+
+目前处于开发的初级阶段，并不能穿透所有类型的 NAT 设备，所以穿透成功率较低。穿透失败时可以尝试 **stcp** 的方式。
+
+1. frps 除正常配置外需要额外配置一个 udp 端口用于支持该类型的客户端:
+
+  ```ini
+  bind_udp_port = 7001
+  ```
+
+2. 启动 frpc，转发内网的 ssh 服务，配置如下，不需要指定远程端口:
+
+  ```ini
+  # frpc.ini
+  [common]
+  server_addr = x.x.x.x
+  server_port = 7000
+
+  [p2p_ssh]
+  type = xtcp
+  # 只有 sk 一致的用户才能访问到此服务
+  sk = abcdefg
+  local_ip = 127.0.0.1
+  local_port = 22
+  ```
+
+3. 在要访问这个服务的机器上启动另外一个 frpc，配置如下:
+
+  ```ini
+  # frpc.ini
+  [common]
+  server_addr = x.x.x.x
+  server_port = 7000
+
+  [p2p_ssh_visitor]
+  type = xtcp
+  # xtcp 的访问者
+  role = visitor
+  # 要访问的 xtcp 代理的名字
+  server_name = p2p_ssh
+  sk = abcdefg
+  # 绑定本地端口用于访问 ssh 服务
+  bind_addr = 127.0.0.1
+  bind_port = 6000
+  ```
+
+4. 通过 ssh 访问内网机器，假设用户名为 test:
+
+  `ssh -oPort=6000 test@127.0.0.1`
+
 ### 通过 frpc 所在机器访问外网
 
 frpc 内置了 http proxy 和 socks5 插件，可以使其他机器通过 frpc 的网络访问互联网。

client/admin_api.go

@@ -64,7 +64,7 @@ func (svr *Service) apiReload(w http.ResponseWriter, r *http.Request, _ httprout
 		return
 	}
 
-	pxyCfgs, vistorCfgs, err := config.LoadProxyConfFromFile(config.ClientCommonCfg.User, conf, newCommonCfg.Start)
+	pxyCfgs, visitorCfgs, err := config.LoadProxyConfFromFile(config.ClientCommonCfg.User, conf, newCommonCfg.Start)
 	if err != nil {
 		res.Code = 3
 		res.Msg = err.Error()
@@ -72,7 +72,7 @@ func (svr *Service) apiReload(w http.ResponseWriter, r *http.Request, _ httprout
 		return
 	}
 
-	svr.ctl.reloadConf(pxyCfgs, vistorCfgs)
+	svr.ctl.reloadConf(pxyCfgs, visitorCfgs)
 	log.Info("success reload conf")
 	return
 }

client/control.go

@@ -49,11 +49,11 @@ type Control struct {
 	// proxies
 	proxies map[string]Proxy
 
-	// vistor configures
+	// visitor configures
-	vistorCfgs map[string]config.ProxyConf
+	visitorCfgs map[string]config.ProxyConf
 
-	// vistors
+	// visitors
-	vistors map[string]Vistor
+	visitors map[string]Visitor
 
 	// control connection
 	conn frpNet.Conn
@@ -84,7 +84,7 @@ type Control struct {
 	log.Logger
 }
 
-func NewControl(svr *Service, pxyCfgs map[string]config.ProxyConf, vistorCfgs map[string]config.ProxyConf) *Control {
+func NewControl(svr *Service, pxyCfgs map[string]config.ProxyConf, visitorCfgs map[string]config.ProxyConf) *Control {
 	loginMsg := &msg.Login{
 		Arch:      runtime.GOARCH,
 		Os:        runtime.GOOS,
@@ -93,16 +93,16 @@ func NewControl(svr *Service, pxyCfgs map[string]config.ProxyConf, vistorCfgs ma
 		Version:   version.Full(),
 	}
 	return &Control{
-		svr:        svr,
+		svr:         svr,
-		loginMsg:   loginMsg,
+		loginMsg:    loginMsg,
-		pxyCfgs:    pxyCfgs,
+		pxyCfgs:     pxyCfgs,
-		vistorCfgs: vistorCfgs,
+		visitorCfgs: visitorCfgs,
-		proxies:    make(map[string]Proxy),
+		proxies:     make(map[string]Proxy),
-		vistors:    make(map[string]Vistor),
+		visitors:    make(map[string]Visitor),
-		sendCh:     make(chan msg.Message, 10),
+		sendCh:      make(chan msg.Message, 10),
-		readCh:     make(chan msg.Message, 10),
+		readCh:      make(chan msg.Message, 10),
-		closedCh:   make(chan int),
+		closedCh:    make(chan int),
-		Logger:     log.NewPrefixLogger(""),
+		Logger:      log.NewPrefixLogger(""),
 	}
 }
 
@@ -137,16 +137,16 @@ func (ctl *Control) Run() (err error) {
 	go ctl.writer()
 	go ctl.reader()
 
-	// start all local vistors
+	// start all local visitors
-	for _, cfg := range ctl.vistorCfgs {
+	for _, cfg := range ctl.visitorCfgs {
-		vistor := NewVistor(ctl, cfg)
+		visitor := NewVisitor(ctl, cfg)
-		err = vistor.Run()
+		err = visitor.Run()
 		if err != nil {
-			vistor.Warn("start error: %v", err)
+			visitor.Warn("start error: %v", err)
 			continue
 		}
-		ctl.vistors[cfg.GetName()] = vistor
+		ctl.visitors[cfg.GetName()] = visitor
-		vistor.Info("start vistor success")
+		visitor.Info("start visitor success")
 	}
 
 	// send NewProxy message for all configured proxies
@@ -441,17 +441,17 @@ func (ctl *Control) controler() {
 				}
 			}
 
-			for _, cfg := range ctl.vistorCfgs {
+			for _, cfg := range ctl.visitorCfgs {
-				if _, exist := ctl.vistors[cfg.GetName()]; !exist {
+				if _, exist := ctl.visitors[cfg.GetName()]; !exist {
-					ctl.Info("try to start vistor [%s]", cfg.GetName())
+					ctl.Info("try to start visitor [%s]", cfg.GetName())
-					vistor := NewVistor(ctl, cfg)
+					visitor := NewVisitor(ctl, cfg)
-					err = vistor.Run()
+					err = visitor.Run()
 					if err != nil {
-						vistor.Warn("start error: %v", err)
+						visitor.Warn("start error: %v", err)
 						continue
 					}
-					ctl.vistors[cfg.GetName()] = vistor
+					ctl.visitors[cfg.GetName()] = visitor
-					vistor.Info("start vistor success")
+					visitor.Info("start visitor success")
 				}
 			}
 			ctl.mu.RUnlock()
@@ -549,7 +549,7 @@ func (ctl *Control) getProxyConf(name string) (conf config.ProxyConf, ok bool) {
 	return
 }
 
-func (ctl *Control) reloadConf(pxyCfgs map[string]config.ProxyConf, vistorCfgs map[string]config.ProxyConf) {
+func (ctl *Control) reloadConf(pxyCfgs map[string]config.ProxyConf, visitorCfgs map[string]config.ProxyConf) {
 	ctl.mu.Lock()
 	defer ctl.mu.Unlock()
 
@@ -588,35 +588,35 @@ func (ctl *Control) reloadConf(pxyCfgs map[string]config.ProxyConf, vistorCfgs m
 	}
 	ctl.Info("proxy added: %v", addedPxyNames)
 
-	removedVistorName := make([]string, 0)
+	removedVisitorName := make([]string, 0)
-	for name, oldVistorCfg := range ctl.vistorCfgs {
+	for name, oldVisitorCfg := range ctl.visitorCfgs {
 		del := false
-		cfg, ok := vistorCfgs[name]
+		cfg, ok := visitorCfgs[name]
 		if !ok {
 			del = true
 		} else {
-			if !oldVistorCfg.Compare(cfg) {
+			if !oldVisitorCfg.Compare(cfg) {
 				del = true
 			}
 		}
 
 		if del {
-			removedVistorName = append(removedVistorName, name)
+			removedVisitorName = append(removedVisitorName, name)
-			delete(ctl.vistorCfgs, name)
+			delete(ctl.visitorCfgs, name)
-			if vistor, ok := ctl.vistors[name]; ok {
+			if visitor, ok := ctl.visitors[name]; ok {
-				vistor.Close()
+				visitor.Close()
 			}
-			delete(ctl.vistors, name)
+			delete(ctl.visitors, name)
 		}
 	}
-	ctl.Info("vistor removed: %v", removedVistorName)
+	ctl.Info("visitor removed: %v", removedVisitorName)
 
-	addedVistorName := make([]string, 0)
+	addedVisitorName := make([]string, 0)
-	for name, vistorCfg := range vistorCfgs {
+	for name, visitorCfg := range visitorCfgs {
-		if _, ok := ctl.vistorCfgs[name]; !ok {
+		if _, ok := ctl.visitorCfgs[name]; !ok {
-			ctl.vistorCfgs[name] = vistorCfg
+			ctl.visitorCfgs[name] = visitorCfg
-			addedVistorName = append(addedVistorName, name)
+			addedVisitorName = append(addedVisitorName, name)
 		}
 	}
-	ctl.Info("vistor added: %v", addedVistorName)
+	ctl.Info("visitor added: %v", addedVisitorName)
 }

client/proxy.go

@@ -273,23 +273,23 @@ func (pxy *XtcpProxy) InWorkConn(conn frpNet.Conn) {
 	clientConn.Close()
 	pxy.Trace("get natHoleRespMsg, sid [%s], client address [%s]", natHoleRespMsg.Sid, natHoleRespMsg.ClientAddr)
 
-	// Send sid to vistor udp address.
+	// Send sid to visitor udp address.
 	time.Sleep(time.Second)
 	laddr, _ := net.ResolveUDPAddr("udp", clientConn.LocalAddr().String())
-	daddr, err := net.ResolveUDPAddr("udp", natHoleRespMsg.VistorAddr)
+	daddr, err := net.ResolveUDPAddr("udp", natHoleRespMsg.VisitorAddr)
 	if err != nil {
-		pxy.Error("resolve vistor udp address error: %v", err)
+		pxy.Error("resolve visitor udp address error: %v", err)
 		return
 	}
 
 	lConn, err := net.DialUDP("udp", laddr, daddr)
 	if err != nil {
-		pxy.Error("dial vistor udp address error: %v", err)
+		pxy.Error("dial visitor udp address error: %v", err)
 		return
 	}
 	lConn.Write([]byte(natHoleRespMsg.Sid))
 
-	kcpConn, err := frpNet.NewKcpConnFromUdp(lConn, true, natHoleRespMsg.VistorAddr)
+	kcpConn, err := frpNet.NewKcpConnFromUdp(lConn, true, natHoleRespMsg.VisitorAddr)
 	if err != nil {
 		pxy.Error("create kcp connection from udp connection error: %v", err)
 		return

client/service.go

@@ -26,11 +26,11 @@ type Service struct {
 	closedCh chan int
 }
 
-func NewService(pxyCfgs map[string]config.ProxyConf, vistorCfgs map[string]config.ProxyConf) (svr *Service) {
+func NewService(pxyCfgs map[string]config.ProxyConf, visitorCfgs map[string]config.ProxyConf) (svr *Service) {
 	svr = &Service{
 		closedCh: make(chan int),
 	}
-	ctl := NewControl(svr, pxyCfgs, vistorCfgs)
+	ctl := NewControl(svr, pxyCfgs, visitorCfgs)
 	svr.ctl = ctl
 	return
 }

client/visitor.go

@@ -35,34 +35,34 @@ import (
 	"github.com/fatedier/frp/utils/util"
 )
 
-// Vistor is used for forward traffics from local port tot remote service.
+// Visitor is used for forward traffics from local port tot remote service.
-type Vistor interface {
+type Visitor interface {
 	Run() error
 	Close()
 	log.Logger
 }
 
-func NewVistor(ctl *Control, pxyConf config.ProxyConf) (vistor Vistor) {
+func NewVisitor(ctl *Control, pxyConf config.ProxyConf) (visitor Visitor) {
-	baseVistor := BaseVistor{
+	baseVisitor := BaseVisitor{
 		ctl:    ctl,
 		Logger: log.NewPrefixLogger(pxyConf.GetName()),
 	}
 	switch cfg := pxyConf.(type) {
 	case *config.StcpProxyConf:
-		vistor = &StcpVistor{
+		visitor = &StcpVisitor{
-			BaseVistor: baseVistor,
+			BaseVisitor: baseVisitor,
-			cfg:        cfg,
+			cfg:         cfg,
 		}
 	case *config.XtcpProxyConf:
-		vistor = &XtcpVistor{
+		visitor = &XtcpVisitor{
-			BaseVistor: baseVistor,
+			BaseVisitor: baseVisitor,
-			cfg:        cfg,
+			cfg:         cfg,
 		}
 	}
 	return
 }
 
-type BaseVistor struct {
+type BaseVisitor struct {
 	ctl    *Control
 	l      frpNet.Listener
 	closed bool
@@ -70,13 +70,13 @@ type BaseVistor struct {
 	log.Logger
 }
 
-type StcpVistor struct {
+type StcpVisitor struct {
-	BaseVistor
+	BaseVisitor
 
 	cfg *config.StcpProxyConf
 }
 
-func (sv *StcpVistor) Run() (err error) {
+func (sv *StcpVisitor) Run() (err error) {
 	sv.l, err = frpNet.ListenTcp(sv.cfg.BindAddr, int64(sv.cfg.BindPort))
 	if err != nil {
 		return
@@ -86,11 +86,11 @@ func (sv *StcpVistor) Run() (err error) {
 	return
 }
 
-func (sv *StcpVistor) Close() {
+func (sv *StcpVisitor) Close() {
 	sv.l.Close()
 }
 
-func (sv *StcpVistor) worker() {
+func (sv *StcpVisitor) worker() {
 	for {
 		conn, err := sv.l.Accept()
 		if err != nil {
@@ -102,46 +102,46 @@ func (sv *StcpVistor) worker() {
 	}
 }
 
-func (sv *StcpVistor) handleConn(userConn frpNet.Conn) {
+func (sv *StcpVisitor) handleConn(userConn frpNet.Conn) {
 	defer userConn.Close()
 
 	sv.Debug("get a new stcp user connection")
-	vistorConn, err := sv.ctl.connectServer()
+	visitorConn, err := sv.ctl.connectServer()
 	if err != nil {
 		return
 	}
-	defer vistorConn.Close()
+	defer visitorConn.Close()
 
 	now := time.Now().Unix()
-	newVistorConnMsg := &msg.NewVistorConn{
+	newVisitorConnMsg := &msg.NewVisitorConn{
 		ProxyName:      sv.cfg.ServerName,
 		SignKey:        util.GetAuthKey(sv.cfg.Sk, now),
 		Timestamp:      now,
 		UseEncryption:  sv.cfg.UseEncryption,
 		UseCompression: sv.cfg.UseCompression,
 	}
-	err = msg.WriteMsg(vistorConn, newVistorConnMsg)
+	err = msg.WriteMsg(visitorConn, newVisitorConnMsg)
 	if err != nil {
-		sv.Warn("send newVistorConnMsg to server error: %v", err)
+		sv.Warn("send newVisitorConnMsg to server error: %v", err)
 		return
 	}
 
-	var newVistorConnRespMsg msg.NewVistorConnResp
+	var newVisitorConnRespMsg msg.NewVisitorConnResp
-	vistorConn.SetReadDeadline(time.Now().Add(10 * time.Second))
+	visitorConn.SetReadDeadline(time.Now().Add(10 * time.Second))
-	err = msg.ReadMsgInto(vistorConn, &newVistorConnRespMsg)
+	err = msg.ReadMsgInto(visitorConn, &newVisitorConnRespMsg)
 	if err != nil {
-		sv.Warn("get newVistorConnRespMsg error: %v", err)
+		sv.Warn("get newVisitorConnRespMsg error: %v", err)
 		return
 	}
-	vistorConn.SetReadDeadline(time.Time{})
+	visitorConn.SetReadDeadline(time.Time{})
 
-	if newVistorConnRespMsg.Error != "" {
+	if newVisitorConnRespMsg.Error != "" {
-		sv.Warn("start new vistor connection error: %s", newVistorConnRespMsg.Error)
+		sv.Warn("start new visitor connection error: %s", newVisitorConnRespMsg.Error)
 		return
 	}
 
 	var remote io.ReadWriteCloser
-	remote = vistorConn
+	remote = visitorConn
 	if sv.cfg.UseEncryption {
 		remote, err = frpIo.WithEncryption(remote, []byte(sv.cfg.Sk))
 		if err != nil {
@@ -157,13 +157,13 @@ func (sv *StcpVistor) handleConn(userConn frpNet.Conn) {
 	frpIo.Join(userConn, remote)
 }
 
-type XtcpVistor struct {
+type XtcpVisitor struct {
-	BaseVistor
+	BaseVisitor
 
 	cfg *config.XtcpProxyConf
 }
 
-func (sv *XtcpVistor) Run() (err error) {
+func (sv *XtcpVisitor) Run() (err error) {
 	sv.l, err = frpNet.ListenTcp(sv.cfg.BindAddr, int64(sv.cfg.BindPort))
 	if err != nil {
 		return
@@ -173,11 +173,11 @@ func (sv *XtcpVistor) Run() (err error) {
 	return
 }
 
-func (sv *XtcpVistor) Close() {
+func (sv *XtcpVisitor) Close() {
 	sv.l.Close()
 }
 
-func (sv *XtcpVistor) worker() {
+func (sv *XtcpVisitor) worker() {
 	for {
 		conn, err := sv.l.Accept()
 		if err != nil {
@@ -189,7 +189,7 @@ func (sv *XtcpVistor) worker() {
 	}
 }
 
-func (sv *XtcpVistor) handleConn(userConn frpNet.Conn) {
+func (sv *XtcpVisitor) handleConn(userConn frpNet.Conn) {
 	defer userConn.Close()
 
 	sv.Debug("get a new xtcp user connection")
@@ -200,26 +200,26 @@ func (sv *XtcpVistor) handleConn(userConn frpNet.Conn) {
 
 	raddr, err := net.ResolveUDPAddr("udp",
 		fmt.Sprintf("%s:%d", config.ClientCommonCfg.ServerAddr, config.ClientCommonCfg.ServerUdpPort))
-	vistorConn, err := net.DialUDP("udp", nil, raddr)
+	visitorConn, err := net.DialUDP("udp", nil, raddr)
-	defer vistorConn.Close()
+	defer visitorConn.Close()
 
 	now := time.Now().Unix()
-	natHoleVistorMsg := &msg.NatHoleVistor{
+	natHoleVisitorMsg := &msg.NatHoleVisitor{
 		ProxyName: sv.cfg.ServerName,
 		SignKey:   util.GetAuthKey(sv.cfg.Sk, now),
 		Timestamp: now,
 	}
-	err = msg.WriteMsg(vistorConn, natHoleVistorMsg)
+	err = msg.WriteMsg(visitorConn, natHoleVisitorMsg)
 	if err != nil {
-		sv.Warn("send natHoleVistorMsg to server error: %v", err)
+		sv.Warn("send natHoleVisitorMsg to server error: %v", err)
 		return
 	}
 
 	// Wait for client address at most 10 seconds.
 	var natHoleRespMsg msg.NatHoleResp
-	vistorConn.SetReadDeadline(time.Now().Add(10 * time.Second))
+	visitorConn.SetReadDeadline(time.Now().Add(10 * time.Second))
 	buf := pool.GetBuf(1024)
-	n, err := vistorConn.Read(buf)
+	n, err := visitorConn.Read(buf)
 	if err != nil {
 		sv.Warn("get natHoleRespMsg error: %v", err)
 		return
@@ -230,13 +230,13 @@ func (sv *XtcpVistor) handleConn(userConn frpNet.Conn) {
 		sv.Warn("get natHoleRespMsg error: %v", err)
 		return
 	}
-	vistorConn.SetReadDeadline(time.Time{})
+	visitorConn.SetReadDeadline(time.Time{})
 	pool.PutBuf(buf)
 
 	sv.Trace("get natHoleRespMsg, sid [%s], client address [%s]", natHoleRespMsg.Sid, natHoleRespMsg.ClientAddr)
 
-	// Close vistorConn, so we can use it's local address.
+	// Close visitorConn, so we can use it's local address.
-	vistorConn.Close()
+	visitorConn.Close()
 
 	// Send detect message.
 	array := strings.Split(natHoleRespMsg.ClientAddr, ":")
@@ -244,7 +244,7 @@ func (sv *XtcpVistor) handleConn(userConn frpNet.Conn) {
 		sv.Error("get natHoleResp client address error: %s", natHoleRespMsg.ClientAddr)
 		return
 	}
-	laddr, _ := net.ResolveUDPAddr("udp", vistorConn.LocalAddr().String())
+	laddr, _ := net.ResolveUDPAddr("udp", visitorConn.LocalAddr().String())
 	/*
 		for i := 1000; i < 65000; i++ {
 			sv.sendDetectMsg(array[0], int64(i), laddr, "a")
@@ -258,7 +258,7 @@ func (sv *XtcpVistor) handleConn(userConn frpNet.Conn) {
 	sv.sendDetectMsg(array[0], int64(port), laddr, []byte(natHoleRespMsg.Sid))
 	sv.Trace("send all detect msg done")
 
-	// Listen for vistorConn's address and wait for client connection.
+	// Listen for visitorConn's address and wait for client connection.
 	lConn, _ := net.ListenUDP("udp", laddr)
 	lConn.SetReadDeadline(time.Now().Add(5 * time.Second))
 	sidBuf := pool.GetBuf(1024)
@@ -298,7 +298,7 @@ func (sv *XtcpVistor) handleConn(userConn frpNet.Conn) {
 	sv.Debug("join connections closed")
 }
 
-func (sv *XtcpVistor) sendDetectMsg(addr string, port int64, laddr *net.UDPAddr, content []byte) (err error) {
+func (sv *XtcpVisitor) sendDetectMsg(addr string, port int64, laddr *net.UDPAddr, content []byte) (err error) {
 	daddr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", addr, port))
 	if err != nil {
 		return err

cmd/frpc/main.go

@@ -156,7 +156,7 @@ func main() {
 		}
 	}
 
-	pxyCfgs, vistorCfgs, err := config.LoadProxyConfFromFile(config.ClientCommonCfg.User, conf, config.ClientCommonCfg.Start)
+	pxyCfgs, visitorCfgs, err := config.LoadProxyConfFromFile(config.ClientCommonCfg.User, conf, config.ClientCommonCfg.Start)
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
@@ -165,7 +165,7 @@ func main() {
 	log.InitLog(config.ClientCommonCfg.LogWay, config.ClientCommonCfg.LogFile,
 		config.ClientCommonCfg.LogLevel, config.ClientCommonCfg.LogMaxDays)
 
-	svr := client.NewService(pxyCfgs, vistorCfgs)
+	svr := client.NewService(pxyCfgs, visitorCfgs)
 
 	// Capture the exit signal if we use kcp.
 	if config.ClientCommonCfg.Protocol == "kcp" {

conf/frpc_full.ini

@@ -119,24 +119,24 @@ plugin_http_passwd = abc
 
 [secret_tcp]
 # If the type is secret tcp, remote_port is useless
-# Who want to connect local port should deploy another frpc with stcp proxy and role is vistor
+# Who want to connect local port should deploy another frpc with stcp proxy and role is visitor
 type = stcp
-# sk used for authentication for vistors
+# sk used for authentication for visitors
 sk = abcdefg
 local_ip = 127.0.0.1
 local_port = 22
 use_encryption = false
 use_compression = false
 
-# user of frpc should be same in both stcp server and stcp vistor
+# user of frpc should be same in both stcp server and stcp visitor
-[secret_tcp_vistor]
+[secret_tcp_visitor]
-# frpc role vistor -> frps -> frpc role server
+# frpc role visitor -> frps -> frpc role server
-role = vistor
+role = visitor
 type = stcp
-# the server name you want to vistor
+# the server name you want to visitor
 server_name = secret_tcp
 sk = abcdefg
-# connect this address to vistor stcp server
+# connect this address to visitor stcp server
 bind_addr = 127.0.0.1
 bind_port = 9000
 use_encryption = false
@@ -150,8 +150,8 @@ local_port = 22
 use_encryption = false
 use_compression = false
 
-[p2p_tcp_vistor]
+[p2p_tcp_visitor]
-role = vistor
+role = visitor
 type = xtcp
 server_name = p2p_tcp
 sk = abcdefg

models/config/proxy.go

@@ -595,7 +595,7 @@ type StcpProxyConf struct {
 	LocalSvrConf
 	PluginConf
 
-	// used in role vistor
+	// used in role visitor
 	ServerName string `json:"server_name"`
 	BindAddr   string `json:"bind_addr"`
 	BindPort   int    `json:"bind_port"`
@@ -632,7 +632,7 @@ func (cfg *StcpProxyConf) LoadFromFile(name string, section ini.Section) (err er
 	}
 
 	tmpStr := section["role"]
-	if tmpStr == "server" || tmpStr == "vistor" {
+	if tmpStr == "server" || tmpStr == "visitor" {
 		cfg.Role = tmpStr
 	} else {
 		cfg.Role = "server"
@@ -640,7 +640,7 @@ func (cfg *StcpProxyConf) LoadFromFile(name string, section ini.Section) (err er
 
 	cfg.Sk = section["sk"]
 
-	if tmpStr == "vistor" {
+	if tmpStr == "visitor" {
 		prefix := section["prefix"]
 		cfg.ServerName = prefix + section["server_name"]
 		if cfg.BindAddr = section["bind_addr"]; cfg.BindAddr == "" {
@@ -684,7 +684,7 @@ type XtcpProxyConf struct {
 	LocalSvrConf
 	PluginConf
 
-	// used in role vistor
+	// used in role visitor
 	ServerName string `json:"server_name"`
 	BindAddr   string `json:"bind_addr"`
 	BindPort   int    `json:"bind_port"`
@@ -721,7 +721,7 @@ func (cfg *XtcpProxyConf) LoadFromFile(name string, section ini.Section) (err er
 	}
 
 	tmpStr := section["role"]
-	if tmpStr == "server" || tmpStr == "vistor" {
+	if tmpStr == "server" || tmpStr == "visitor" {
 		cfg.Role = tmpStr
 	} else {
 		cfg.Role = "server"
@@ -729,7 +729,7 @@ func (cfg *XtcpProxyConf) LoadFromFile(name string, section ini.Section) (err er
 
 	cfg.Sk = section["sk"]
 
-	if tmpStr == "vistor" {
+	if tmpStr == "visitor" {
 		prefix := section["prefix"]
 		cfg.ServerName = prefix + section["server_name"]
 		if cfg.BindAddr = section["bind_addr"]; cfg.BindAddr == "" {
@@ -765,7 +765,7 @@ func (cfg *XtcpProxyConf) Check() (err error) {
 // if len(startProxy) is 0, start all
 // otherwise just start proxies in startProxy map
 func LoadProxyConfFromFile(prefix string, conf ini.File, startProxy map[string]struct{}) (
-	proxyConfs map[string]ProxyConf, vistorConfs map[string]ProxyConf, err error) {
+	proxyConfs map[string]ProxyConf, visitorConfs map[string]ProxyConf, err error) {
 
 	if prefix != "" {
 		prefix += "."
@@ -776,7 +776,7 @@ func LoadProxyConfFromFile(prefix string, conf ini.File, startProxy map[string]s
 		startAll = false
 	}
 	proxyConfs = make(map[string]ProxyConf)
-	vistorConfs = make(map[string]ProxyConf)
+	visitorConfs = make(map[string]ProxyConf)
 	for name, section := range conf {
 		_, shouldStart := startProxy[name]
 		if name != "common" && (startAll || shouldStart) {
@@ -784,12 +784,12 @@ func LoadProxyConfFromFile(prefix string, conf ini.File, startProxy map[string]s
 			section["prefix"] = prefix
 			cfg, err := NewProxyConfFromFile(name, section)
 			if err != nil {
-				return proxyConfs, vistorConfs, err
+				return proxyConfs, visitorConfs, err
 			}
 
 			role := section["role"]
-			if role == "vistor" {
+			if role == "visitor" {
-				vistorConfs[prefix+name] = cfg
+				visitorConfs[prefix+name] = cfg
 			} else {
 				proxyConfs[prefix+name] = cfg
 			}

models/msg/msg.go

@@ -20,23 +20,23 @@ import (
 )
 
 const (
-	TypeLogin             = 'o'
+	TypeLogin              = 'o'
-	TypeLoginResp         = '1'
+	TypeLoginResp          = '1'
-	TypeNewProxy          = 'p'
+	TypeNewProxy           = 'p'
-	TypeNewProxyResp      = '2'
+	TypeNewProxyResp       = '2'
-	TypeCloseProxy        = 'c'
+	TypeCloseProxy         = 'c'
-	TypeNewWorkConn       = 'w'
+	TypeNewWorkConn        = 'w'
-	TypeReqWorkConn       = 'r'
+	TypeReqWorkConn        = 'r'
-	TypeStartWorkConn     = 's'
+	TypeStartWorkConn      = 's'
-	TypeNewVistorConn     = 'v'
+	TypeNewVisitorConn     = 'v'
-	TypeNewVistorConnResp = '3'
+	TypeNewVisitorConnResp = '3'
-	TypePing              = 'h'
+	TypePing               = 'h'
-	TypePong              = '4'
+	TypePong               = '4'
-	TypeUdpPacket         = 'u'
+	TypeUdpPacket          = 'u'
-	TypeNatHoleVistor     = 'i'
+	TypeNatHoleVisitor     = 'i'
-	TypeNatHoleClient     = 'n'
+	TypeNatHoleClient      = 'n'
-	TypeNatHoleResp       = 'm'
+	TypeNatHoleResp        = 'm'
-	TypeNatHoleSid        = '5'
+	TypeNatHoleSid         = '5'
 )
 
 var (
@@ -56,12 +56,12 @@ func init() {
 	TypeMap[TypeNewWorkConn] = reflect.TypeOf(NewWorkConn{})
 	TypeMap[TypeReqWorkConn] = reflect.TypeOf(ReqWorkConn{})
 	TypeMap[TypeStartWorkConn] = reflect.TypeOf(StartWorkConn{})
-	TypeMap[TypeNewVistorConn] = reflect.TypeOf(NewVistorConn{})
+	TypeMap[TypeNewVisitorConn] = reflect.TypeOf(NewVisitorConn{})
-	TypeMap[TypeNewVistorConnResp] = reflect.TypeOf(NewVistorConnResp{})
+	TypeMap[TypeNewVisitorConnResp] = reflect.TypeOf(NewVisitorConnResp{})
 	TypeMap[TypePing] = reflect.TypeOf(Ping{})
 	TypeMap[TypePong] = reflect.TypeOf(Pong{})
 	TypeMap[TypeUdpPacket] = reflect.TypeOf(UdpPacket{})
-	TypeMap[TypeNatHoleVistor] = reflect.TypeOf(NatHoleVistor{})
+	TypeMap[TypeNatHoleVisitor] = reflect.TypeOf(NatHoleVisitor{})
 	TypeMap[TypeNatHoleClient] = reflect.TypeOf(NatHoleClient{})
 	TypeMap[TypeNatHoleResp] = reflect.TypeOf(NatHoleResp{})
 	TypeMap[TypeNatHoleSid] = reflect.TypeOf(NatHoleSid{})
@@ -138,7 +138,7 @@ type StartWorkConn struct {
 	ProxyName string `json:"proxy_name"`
 }
 
-type NewVistorConn struct {
+type NewVisitorConn struct {
 	ProxyName      string `json:"proxy_name"`
 	SignKey        string `json:"sign_key"`
 	Timestamp      int64  `json:"timestamp"`
@@ -146,7 +146,7 @@ type NewVistorConn struct {
 	UseCompression bool   `json:"use_compression"`
 }
 
-type NewVistorConnResp struct {
+type NewVisitorConnResp struct {
 	ProxyName string `json:"proxy_name"`
 	Error     string `json:"error"`
 }
@@ -163,7 +163,7 @@ type UdpPacket struct {
 	RemoteAddr *net.UDPAddr `json:"r"`
 }
 
-type NatHoleVistor struct {
+type NatHoleVisitor struct {
 	ProxyName string `json:"proxy_name"`
 	SignKey   string `json:"sign_key"`
 	Timestamp int64  `json:"timestamp"`
@@ -175,9 +175,9 @@ type NatHoleClient struct {
 }
 
 type NatHoleResp struct {
-	Sid        string `json:"sid"`
+	Sid         string `json:"sid"`
-	VistorAddr string `json:"vistor_addr"`
+	VisitorAddr string `json:"visitor_addr"`
-	ClientAddr string `json:"client_addr"`
+	ClientAddr  string `json:"client_addr"`
 }
 
 type NatHoleSid struct {

server/manager.go

@@ -93,46 +93,46 @@ func (pm *ProxyManager) GetByName(name string) (pxy Proxy, ok bool) {
 	return
 }
 
-// Manager for vistor listeners.
+// Manager for visitor listeners.
-type VistorManager struct {
+type VisitorManager struct {
-	vistorListeners map[string]*frpNet.CustomListener
+	visitorListeners map[string]*frpNet.CustomListener
-	skMap           map[string]string
+	skMap            map[string]string
 
 	mu sync.RWMutex
 }
 
-func NewVistorManager() *VistorManager {
+func NewVisitorManager() *VisitorManager {
-	return &VistorManager{
+	return &VisitorManager{
-		vistorListeners: make(map[string]*frpNet.CustomListener),
+		visitorListeners: make(map[string]*frpNet.CustomListener),
-		skMap:           make(map[string]string),
+		skMap:            make(map[string]string),
 	}
 }
 
-func (vm *VistorManager) Listen(name string, sk string) (l *frpNet.CustomListener, err error) {
+func (vm *VisitorManager) Listen(name string, sk string) (l *frpNet.CustomListener, err error) {
 	vm.mu.Lock()
 	defer vm.mu.Unlock()
 
-	if _, ok := vm.vistorListeners[name]; ok {
+	if _, ok := vm.visitorListeners[name]; ok {
 		err = fmt.Errorf("custom listener for [%s] is repeated", name)
 		return
 	}
 
 	l = frpNet.NewCustomListener()
-	vm.vistorListeners[name] = l
+	vm.visitorListeners[name] = l
 	vm.skMap[name] = sk
 	return
 }
 
-func (vm *VistorManager) NewConn(name string, conn frpNet.Conn, timestamp int64, signKey string,
+func (vm *VisitorManager) NewConn(name string, conn frpNet.Conn, timestamp int64, signKey string,
 	useEncryption bool, useCompression bool) (err error) {
 
 	vm.mu.RLock()
 	defer vm.mu.RUnlock()
 
-	if l, ok := vm.vistorListeners[name]; ok {
+	if l, ok := vm.visitorListeners[name]; ok {
 		var sk string
 		if sk = vm.skMap[name]; util.GetAuthKey(sk, timestamp) != signKey {
-			err = fmt.Errorf("vistor connection of [%s] auth failed", name)
+			err = fmt.Errorf("visitor connection of [%s] auth failed", name)
 			return
 		}
 
@@ -154,10 +154,10 @@ func (vm *VistorManager) NewConn(name string, conn frpNet.Conn, timestamp int64,
 	return
 }
 
-func (vm *VistorManager) CloseListener(name string) {
+func (vm *VisitorManager) CloseListener(name string) {
 	vm.mu.Lock()
 	defer vm.mu.Unlock()
 
-	delete(vm.vistorListeners, name)
+	delete(vm.visitorListeners, name)
 	delete(vm.skMap, name)
 }

server/nathole.go

@@ -78,8 +78,8 @@ func (nc *NatHoleController) Run() {
 		}
 
 		switch m := rawMsg.(type) {
-		case *msg.NatHoleVistor:
+		case *msg.NatHoleVisitor:
-			go nc.HandleVistor(m, raddr)
+			go nc.HandleVisitor(m, raddr)
 		case *msg.NatHoleClient:
 			go nc.HandleClient(m, raddr)
 		default:
@@ -96,12 +96,12 @@ func (nc *NatHoleController) GenSid() string {
 	return fmt.Sprintf("%d%s", t, id)
 }
 
-func (nc *NatHoleController) HandleVistor(m *msg.NatHoleVistor, raddr *net.UDPAddr) {
+func (nc *NatHoleController) HandleVisitor(m *msg.NatHoleVisitor, raddr *net.UDPAddr) {
 	sid := nc.GenSid()
 	session := &NatHoleSession{
-		Sid:        sid,
+		Sid:         sid,
-		VistorAddr: raddr,
+		VisitorAddr: raddr,
-		NotifyCh:   make(chan struct{}, 0),
+		NotifyCh:    make(chan struct{}, 0),
 	}
 	nc.mu.Lock()
 	clientCfg, ok := nc.clientCfgs[m.ProxyName]
@@ -111,7 +111,7 @@ func (nc *NatHoleController) HandleVistor(m *msg.NatHoleVistor, raddr *net.UDPAd
 	}
 	nc.sessions[sid] = session
 	nc.mu.Unlock()
-	log.Trace("handle vistor message, sid [%s]", sid)
+	log.Trace("handle visitor message, sid [%s]", sid)
 
 	defer func() {
 		nc.mu.Lock()
@@ -130,7 +130,7 @@ func (nc *NatHoleController) HandleVistor(m *msg.NatHoleVistor, raddr *net.UDPAd
 	select {
 	case <-session.NotifyCh:
 		resp := nc.GenNatHoleResponse(raddr, session)
-		log.Trace("send nat hole response to vistor")
+		log.Trace("send nat hole response to visitor")
 		nc.listener.WriteToUDP(resp, raddr)
 	case <-time.After(time.Duration(NatHoleTimeout) * time.Second):
 		return
@@ -155,9 +155,9 @@ func (nc *NatHoleController) HandleClient(m *msg.NatHoleClient, raddr *net.UDPAd
 
 func (nc *NatHoleController) GenNatHoleResponse(raddr *net.UDPAddr, session *NatHoleSession) []byte {
 	m := &msg.NatHoleResp{
-		Sid:        session.Sid,
+		Sid:         session.Sid,
-		VistorAddr: session.VistorAddr.String(),
+		VisitorAddr: session.VisitorAddr.String(),
-		ClientAddr: session.ClientAddr.String(),
+		ClientAddr:  session.ClientAddr.String(),
 	}
 	b := bytes.NewBuffer(nil)
 	err := msg.WriteMsg(b, m)
@@ -168,9 +168,9 @@ func (nc *NatHoleController) GenNatHoleResponse(raddr *net.UDPAddr, session *Nat
 }
 
 type NatHoleSession struct {
-	Sid        string
+	Sid         string
-	VistorAddr *net.UDPAddr
+	VisitorAddr *net.UDPAddr
-	ClientAddr *net.UDPAddr
+	ClientAddr  *net.UDPAddr
 
 	NotifyCh chan struct{}
 }

server/proxy.go

@@ -290,7 +290,7 @@ type StcpProxy struct {
 }
 
 func (pxy *StcpProxy) Run() error {
-	listener, err := pxy.ctl.svr.vistorManager.Listen(pxy.GetName(), pxy.cfg.Sk)
+	listener, err := pxy.ctl.svr.visitorManager.Listen(pxy.GetName(), pxy.cfg.Sk)
 	if err != nil {
 		return err
 	}
@@ -308,7 +308,7 @@ func (pxy *StcpProxy) GetConf() config.ProxyConf {
 
 func (pxy *StcpProxy) Close() {
 	pxy.BaseProxy.Close()
-	pxy.ctl.svr.vistorManager.CloseListener(pxy.GetName())
+	pxy.ctl.svr.visitorManager.CloseListener(pxy.GetName())
 }
 
 type XtcpProxy struct {

server/service.go

@@ -56,8 +56,8 @@ type Service struct {
 	// Manage all proxies.
 	pxyManager *ProxyManager
 
-	// Manage all vistor listeners.
+	// Manage all visitor listeners.
-	vistorManager *VistorManager
+	visitorManager *VisitorManager
 
 	// Controller for nat hole connections.
 	natHoleController *NatHoleController
@@ -65,9 +65,9 @@ type Service struct {
 
 func NewService() (svr *Service, err error) {
 	svr = &Service{
-		ctlManager:    NewControlManager(),
+		ctlManager:     NewControlManager(),
-		pxyManager:    NewProxyManager(),
+		pxyManager:     NewProxyManager(),
-		vistorManager: NewVistorManager(),
+		visitorManager: NewVisitorManager(),
 	}
 	cfg := config.ServerCommonCfg
 
@@ -200,16 +200,16 @@ func (svr *Service) HandleListener(l frpNet.Listener) {
 					}
 				case *msg.NewWorkConn:
 					svr.RegisterWorkConn(conn, m)
-				case *msg.NewVistorConn:
+				case *msg.NewVisitorConn:
-					if err = svr.RegisterVistorConn(conn, m); err != nil {
+					if err = svr.RegisterVisitorConn(conn, m); err != nil {
 						conn.Warn("%v", err)
-						msg.WriteMsg(conn, &msg.NewVistorConnResp{
+						msg.WriteMsg(conn, &msg.NewVisitorConnResp{
 							ProxyName: m.ProxyName,
 							Error:     err.Error(),
 						})
 						conn.Close()
 					} else {
-						msg.WriteMsg(conn, &msg.NewVistorConnResp{
+						msg.WriteMsg(conn, &msg.NewVisitorConnResp{
 							ProxyName: m.ProxyName,
 							Error:     "",
 						})
@@ -300,8 +300,8 @@ func (svr *Service) RegisterWorkConn(workConn frpNet.Conn, newMsg *msg.NewWorkCo
 	return
 }
 
-func (svr *Service) RegisterVistorConn(vistorConn frpNet.Conn, newMsg *msg.NewVistorConn) error {
+func (svr *Service) RegisterVisitorConn(visitorConn frpNet.Conn, newMsg *msg.NewVisitorConn) error {
-	return svr.vistorManager.NewConn(newMsg.ProxyName, vistorConn, newMsg.Timestamp, newMsg.SignKey,
+	return svr.visitorManager.NewConn(newMsg.ProxyName, visitorConn, newMsg.Timestamp, newMsg.SignKey,
 		newMsg.UseEncryption, newMsg.UseCompression)
 }