Merge pull request #5 from fatedier/dev

Release version 0.1.0

.gitignore

@@ -26,3 +26,6 @@ _testmain.go
 # Self
 bin/
 
+# Cache
+*.swp
+*.swo

.travis.yml

@@ -0,0 +1,12 @@
+sudo: false
+language: go
+
+go:
+    - 1.4.2
+    - 1.5.1
+
+install:
+    - make
+
+script:
+    - make test

Makefile

@@ -1,15 +1,22 @@
 export PATH := $(GOPATH)/bin:$(PATH)
+export NEW_GOPATH := $(shell pwd)
 
 all: build
 
-build: godep frps frpc
+build: godep fmt frps frpc
 
 godep:
 	@go get github.com/tools/godep
 	godep restore
 
+fmt:
+	@GOPATH=$(NEW_GOPATH) godep go fmt ./...
+
 frps:
-	godep go build -o bin/frps ./cmd/frps
+	GOPATH=$(NEW_GOPATH) godep go build -o bin/frps ./src/frp/cmd/frps
 
 frpc:
-	godep go build -o bin/frpc ./cmd/frpc
+	GOPATH=$(NEW_GOPATH) godep go build -o bin/frpc ./src/frp/cmd/frpc
+
+test:
+	@GOPATH=$(NEW_GOPATH) godep go test ./...

README.md

@@ -1,2 +1,5 @@
 # frp
+
+[![Build Status](https://travis-ci.org/fatedier/frp.svg)](https://travis-ci.org/fatedier/frp)
+
 A fast reverse proxy.

cmd/frpc/control.go

@@ -1,67 +0,0 @@
-package main
-
-import (
-	"io"
-	"sync"
-	"encoding/json"
-
-	"frp/pkg/models"
-	"frp/pkg/utils/conn"
-	"frp/pkg/utils/log"
-)
-
-func ControlProcess(cli *models.ProxyClient, wait *sync.WaitGroup) {
-	defer wait.Done()
-
-	c := &conn.Conn{}
-	err := c.ConnectServer(ServerAddr, ServerPort)
-	if err != nil {
-		log.Error("ProxyName [%s], connect to server [%s:%d] error, %v", cli.Name, ServerAddr, ServerPort, err)
-		return
-	}
-	defer c.Close()
-
-	req := &models.ClientCtlReq{
-		Type:		models.ControlConn,
-		ProxyName:	cli.Name,
-		Passwd:		cli.Passwd,
-	}
-	buf, _ := json.Marshal(req)
-	err = c.Write(string(buf) + "\n")
-	if err != nil {
-		log.Error("ProxyName [%s], write to server error, %v", cli.Name, err)
-		return
-	}
-
-	res, err := c.ReadLine()
-	if err != nil {
-		log.Error("ProxyName [%s], read from server error, %v", cli.Name, err)
-		return
-	}
-	log.Debug("ProxyName [%s], read [%s]", cli.Name, res)
-
-	clientCtlRes := &models.ClientCtlRes{}
-	if err = json.Unmarshal([]byte(res), &clientCtlRes); err != nil {
-		log.Error("ProxyName [%s], format server response error, %v", cli.Name, err)
-		return
-	}
-
-	if clientCtlRes.Code != 0 {
-		log.Error("ProxyName [%s], start proxy error, %s", cli.Name, clientCtlRes.Msg)
-		return
-	}
-
-	for {
-		// ignore response content now
-		_, err := c.ReadLine()
-		if err == io.EOF {
-			log.Debug("ProxyName [%s], server close this control conn", cli.Name)
-			break
-		} else if err != nil {
-			log.Warn("ProxyName [%s], read from server error, %v", cli.Name, err)
-			continue
-		}
-
-		cli.StartTunnel(ServerAddr, ServerPort)
-	}
-}

cmd/frps/control.go

@@ -1,134 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"encoding/json"
-
-	"frp/pkg/utils/log"
-	"frp/pkg/utils/conn"
-	"frp/pkg/models"
-)
-
-func ProcessControlConn(l *conn.Listener) {
-	for {
-		c := l.GetConn()
-		log.Debug("Get one new conn, %v", c.GetRemoteAddr())
-		go controlWorker(c)
-	}
-}
-
-// control connection from every client and server
-func controlWorker(c *conn.Conn) {
-	// the first message is from client to server
-	// if error, close connection
-	res, err := c.ReadLine()
-	if err != nil {
-		log.Warn("Read error, %v", err)
-		return
-	}
-	log.Debug("get: %s", res)
-
-	clientCtlReq := &models.ClientCtlReq{}
-	clientCtlRes := &models.ClientCtlRes{}
-	if err := json.Unmarshal([]byte(res), &clientCtlReq); err != nil {
-		log.Warn("Parse err: %v : %s", err, res)
-		return
-	}
-
-	// check
-	succ, msg, needRes := checkProxy(clientCtlReq, c)
-	if !succ {
-		clientCtlRes.Code = 1
-		clientCtlRes.Msg = msg
-	}
-	
-	if needRes {
-		buf, _ := json.Marshal(clientCtlRes)
-		err = c.Write(string(buf) + "\n")
-		if err != nil {
-			log.Warn("Write error, %v", err)
-		}
-	} else {
-	// work conn, just return
-		return
-	}
-
-	defer c.Close()
-	// others is from server to client
-	server, ok := ProxyServers[clientCtlReq.ProxyName]
-	if !ok {
-		log.Warn("ProxyName [%s] is not exist", clientCtlReq.ProxyName)
-		return
-	}
-
-	serverCtlReq := &models.ClientCtlReq{}
-	serverCtlReq.Type = models.WorkConn
-	for {
-		server.WaitUserConn()
-		buf, _ := json.Marshal(serverCtlReq)
-		err = c.Write(string(buf) + "\n")
-		if err != nil {
-			log.Warn("ProxyName [%s], write to client error, proxy exit", server.Name)
-			server.Close()
-			return
-		}
-
-		log.Debug("ProxyName [%s], write to client to add work conn success", server.Name)
-	}
-
-	return
-}
-
-func checkProxy(req *models.ClientCtlReq, c *conn.Conn) (succ bool, msg string, needRes bool) {
-	succ = false
-	needRes = true
-	// check if proxy name exist
-	server, ok := ProxyServers[req.ProxyName]
-	if !ok {
-		msg = fmt.Sprintf("ProxyName [%s] is not exist", req.ProxyName)
-		log.Warn(msg)
-		return
-	}
-
-	// check password
-	if req.Passwd != server.Passwd {
-		msg = fmt.Sprintf("ProxyName [%s], password is not correct", req.ProxyName)
-		log.Warn(msg)
-		return
-	}
-	
-	// control conn
-	if req.Type == models.ControlConn {
-		if server.Status != models.Idle {
-			msg = fmt.Sprintf("ProxyName [%s], already in use", req.ProxyName)
-			log.Warn(msg)
-			return
-		}
-
-		// start proxy and listen for user conn, no block
-		err := server.Start()
-		if err != nil {
-			msg = fmt.Sprintf("ProxyName [%s], start proxy error: %v", req.ProxyName, err.Error())
-			log.Warn(msg)
-			return
-		}
-
-		log.Info("ProxyName [%s], start proxy success", req.ProxyName)
-	} else if req.Type == models.WorkConn {
-	// work conn
-		needRes = false
-		if server.Status != models.Working {
-			log.Warn("ProxyName [%s], is not working when it gets one new work conn", req.ProxyName)
-			return
-		}
-
-		server.CliConnChan <- c
-	} else {
-		msg = fmt.Sprintf("ProxyName [%s], type [%d] unsupport", req.ProxyName)
-		log.Warn(msg)
-		return
-	}
-
-	succ = true
-	return
-}

conf/frpc.ini

@@ -1,12 +1,12 @@
 # common是必须的section
 [common]
 server_addr = 127.0.0.1
-bind_port = 7000
+server_port = 7000
 log_file = ./frpc.log
 # debug, info, warn, error
-log_level = info
+log_level = debug
 # file, console
-log_way = file
+log_way = console
 
 # test1即为name
 [test1]

conf/frps.ini

@@ -4,9 +4,9 @@ bind_addr = 0.0.0.0
 bind_port = 7000
 log_file = ./frps.log
 # debug, info, warn, error
-log_level = info
+log_level = debug
 # file, console
-log_way = file
+log_way = console 
 
 # test1即为name
 [test1]

pkg/models/msg.go

@@ -1,27 +0,0 @@
-package models
-
-type GeneralRes struct {
-	Code			int64	`json:"code"`
-	Msg				string	`json:"msg"`
-}
-
-// type
-const (
-	ControlConn = iota
-	WorkConn
-)
-
-type ClientCtlReq struct {
-	Type			int64	`json:"type"`
-	ProxyName		string	`json:"proxy_name"`
-	Passwd			string	`json:"passwd"`
-}
-
-type ClientCtlRes struct {
-	GeneralRes
-}
-
-
-type ServerCtlReq struct {
-	Type			int64	`json:"type"`
-}

pkg/models/server.go

@@ -1,116 +0,0 @@
-package models
-
-import (
-	"sync"
-	"container/list"
-
-	"frp/pkg/utils/conn"
-	"frp/pkg/utils/log"
-)
-
-const (
-	Idle = iota
-	Working
-)
-
-type ProxyServer struct {
-	Name			string
-	Passwd			string
-	BindAddr		string
-	ListenPort		int64
-
-	Status			int64
-	Listener		*conn.Listener		// accept new connection from remote users
-	CtlMsgChan		chan int64			// every time accept a new user conn, put "1" to the channel
-	CliConnChan		chan *conn.Conn		// get client conns from control goroutine
-	UserConnList	*list.List			// store user conns
-	Mutex			sync.Mutex
-}
-
-func (p *ProxyServer) Init() {
-	p.Status = Idle
-	p.CtlMsgChan = make(chan int64)
-	p.CliConnChan = make(chan *conn.Conn)
-	p.UserConnList = list.New()
-}
-
-func (p *ProxyServer) Lock() {
-	p.Mutex.Lock()
-}
-
-func (p *ProxyServer) Unlock() {
-	p.Mutex.Unlock()
-}
-
-// start listening for user conns
-func (p *ProxyServer) Start() (err error) {
-	p.Listener, err = conn.Listen(p.BindAddr, p.ListenPort)
-	if err != nil {
-		return err
-	}
-
-	p.Status = Working
-
-	// start a goroutine for listener
-	go func() {
-		for {
-			// block
-			c := p.Listener.GetConn()	
-			log.Debug("ProxyName [%s], get one new user conn [%s]", p.Name, c.GetRemoteAddr())
-
-			// put to list
-			p.Lock()
-			if p.Status != Working {
-				log.Debug("ProxyName [%s] is not working, new user conn close", p.Name)
-				c.Close()
-				p.Unlock()
-				return
-			}
-			p.UserConnList.PushBack(c)
-			p.Unlock()
-
-			// put msg to control conn
-			p.CtlMsgChan <- 1
-		}
-	}()
-
-	// start another goroutine for join two conns from client and user
-	go func() {
-		for {
-			cliConn := <-p.CliConnChan
-			p.Lock()
-			element := p.UserConnList.Front()
-
-			var userConn *conn.Conn
-			if element != nil {
-				userConn = element.Value.(*conn.Conn)
-				p.UserConnList.Remove(element)
-			} else {
-				cliConn.Close()
-				continue
-			}
-			p.Unlock()
-
-			// msg will transfer to another without modifying
-			log.Debug("Join two conns, (l[%s] r[%s]) (l[%s] r[%s])", cliConn.GetLocalAddr(), cliConn.GetRemoteAddr(),
-					userConn.GetLocalAddr(), userConn.GetRemoteAddr())
-			go conn.Join(cliConn, userConn)
-		}
-	}()
-
-	return nil
-}
-
-func (p *ProxyServer) Close() {
-	p.Lock()
-	p.Status = Idle
-	p.CtlMsgChan = make(chan int64)
-	p.CliConnChan = make(chan *conn.Conn)
-	p.UserConnList = list.New()
-	p.Unlock()
-}
-
-func (p *ProxyServer) WaitUserConn() (res int64) {
-	res = <-p.CtlMsgChan
-	return 
-}

src/frp/cmd/frpc/control.go

@@ -0,0 +1,155 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"sync"
+	"time"
+
+	"frp/models/client"
+	"frp/models/consts"
+	"frp/models/msg"
+	"frp/utils/conn"
+	"frp/utils/log"
+)
+
+var connection *conn.Conn = nil
+var heartBeatTimer *time.Timer = nil
+
+func ControlProcess(cli *client.ProxyClient, wait *sync.WaitGroup) {
+	defer wait.Done()
+
+	c, err := loginToServer(cli)
+	if err != nil {
+		log.Error("ProxyName [%s], connect to server failed!", cli.Name)
+		return
+	}
+	connection = c
+	defer connection.Close()
+
+	for {
+		// ignore response content now
+		content, err := connection.ReadLine()
+		if err == io.EOF || nil == connection || connection.IsClosed() {
+			log.Debug("ProxyName [%s], server close this control conn", cli.Name)
+			var sleepTime time.Duration = 1
+
+			// loop until connect to server
+			for {
+				log.Debug("ProxyName [%s], try to reconnect to server[%s:%d]...", cli.Name, client.ServerAddr, client.ServerPort)
+				tmpConn, err := loginToServer(cli)
+				if err == nil {
+					connection.Close()
+					connection = tmpConn
+					break
+				}
+
+				if sleepTime < 60 {
+					sleepTime = sleepTime * 2
+				}
+				time.Sleep(sleepTime * time.Second)
+			}
+			continue
+		} else if err != nil {
+			log.Warn("ProxyName [%s], read from server error, %v", cli.Name, err)
+			continue
+		}
+
+		clientCtlRes := &msg.ClientCtlRes{}
+		if err := json.Unmarshal([]byte(content), clientCtlRes); err != nil {
+			log.Warn("Parse err: %v : %s", err, content)
+			continue
+		}
+		if consts.SCHeartBeatRes == clientCtlRes.GeneralRes.Code {
+			if heartBeatTimer != nil {
+				log.Debug("Client rcv heartbeat response")
+				heartBeatTimer.Reset(time.Duration(client.HeartBeatTimeout) * time.Second)
+			} else {
+				log.Error("heartBeatTimer is nil")
+			}
+			continue
+		}
+
+		cli.StartTunnel(client.ServerAddr, client.ServerPort)
+	}
+}
+
+func loginToServer(cli *client.ProxyClient) (c *conn.Conn, err error) {
+	c, err = conn.ConnectServer(client.ServerAddr, client.ServerPort)
+	if err != nil {
+		log.Error("ProxyName [%s], connect to server [%s:%d] error, %v", cli.Name, client.ServerAddr, client.ServerPort, err)
+		return
+	}
+
+	req := &msg.ClientCtlReq{
+		Type:      consts.CtlConn,
+		ProxyName: cli.Name,
+		Passwd:    cli.Passwd,
+	}
+	buf, _ := json.Marshal(req)
+	err = c.Write(string(buf) + "\n")
+	if err != nil {
+		log.Error("ProxyName [%s], write to server error, %v", cli.Name, err)
+		return
+	}
+
+	res, err := c.ReadLine()
+	if err != nil {
+		log.Error("ProxyName [%s], read from server error, %v", cli.Name, err)
+		return
+	}
+	log.Debug("ProxyName [%s], read [%s]", cli.Name, res)
+
+	clientCtlRes := &msg.ClientCtlRes{}
+	if err = json.Unmarshal([]byte(res), &clientCtlRes); err != nil {
+		log.Error("ProxyName [%s], format server response error, %v", cli.Name, err)
+		return
+	}
+
+	if clientCtlRes.Code != 0 {
+		log.Error("ProxyName [%s], start proxy error, %s", cli.Name, clientCtlRes.Msg)
+		return c, fmt.Errorf("%s", clientCtlRes.Msg)
+	}
+
+	go startHeartBeat(c)
+	log.Debug("ProxyName [%s], connect to server[%s:%d] success!", cli.Name, client.ServerAddr, client.ServerPort)
+
+	return
+}
+
+func startHeartBeat(c *conn.Conn) {
+	f := func() {
+		log.Error("HeartBeat timeout!")
+		if c != nil {
+			c.Close()
+		}
+	}
+	heartBeatTimer = time.AfterFunc(time.Duration(client.HeartBeatTimeout)*time.Second, f)
+	defer heartBeatTimer.Stop()
+
+	clientCtlReq := &msg.ClientCtlReq{
+		Type:      consts.CSHeartBeatReq,
+		ProxyName: "",
+		Passwd:    "",
+	}
+	request, err := json.Marshal(clientCtlReq)
+	if err != nil {
+		log.Warn("Serialize clientCtlReq err! Err: %v", err)
+	}
+
+	log.Debug("Start to send heartbeat")
+	for {
+		time.Sleep(time.Duration(client.HeartBeatInterval) * time.Second)
+		if c != nil && !c.IsClosed() {
+			err = c.Write(string(request) + "\n")
+			if err != nil {
+				log.Error("Send hearbeat to server failed! Err:%v", err)
+				continue
+			}
+		} else {
+			break
+		}
+	}
+	log.Debug("Heartbeat exit")
+}

cmd/frpc/main.go → src/frp/cmd/frpc/main.go

@@ -3,23 +3,24 @@ package main
 import (
 	"os"
 	"sync"
-	
-	"frp/pkg/utils/log"
+
+	"frp/models/client"
+	"frp/utils/log"
 )
 
 func main() {
-	err := LoadConf("./frpc.ini")
+	err := client.LoadConf("./frpc.ini")
 	if err != nil {
 		os.Exit(-1)
 	}
 
-	log.InitLog(LogWay, LogFile, LogLevel)
+	log.InitLog(client.LogWay, client.LogFile, client.LogLevel)
 
 	// wait until all control goroutine exit
 	var wait sync.WaitGroup
-	wait.Add(len(ProxyClients))
+	wait.Add(len(client.ProxyClients))
 
-	for _, client := range ProxyClients {
+	for _, client := range client.ProxyClients {
 		go ControlProcess(client, &wait)
 	}
 

src/frp/cmd/frps/control.go

@@ -0,0 +1,204 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"time"
+
+	"frp/models/consts"
+	"frp/models/msg"
+	"frp/models/server"
+	"frp/utils/conn"
+	"frp/utils/log"
+)
+
+func ProcessControlConn(l *conn.Listener) {
+	for {
+		c, err := l.GetConn()
+		if err != nil {
+			return
+		}
+		log.Debug("Get one new conn, %v", c.GetRemoteAddr())
+		go controlWorker(c)
+	}
+}
+
+// connection from every client and server
+func controlWorker(c *conn.Conn) {
+	// the first message is from client to server
+	// if error, close connection
+	res, err := c.ReadLine()
+	if err != nil {
+		log.Warn("Read error, %v", err)
+		return
+	}
+	log.Debug("get: %s", res)
+
+	clientCtlReq := &msg.ClientCtlReq{}
+	clientCtlRes := &msg.ClientCtlRes{}
+	if err := json.Unmarshal([]byte(res), &clientCtlReq); err != nil {
+		log.Warn("Parse err: %v : %s", err, res)
+		return
+	}
+
+	// check
+	succ, info, needRes := checkProxy(clientCtlReq, c)
+	if !succ {
+		clientCtlRes.Code = 1
+		clientCtlRes.Msg = info
+	}
+
+	if needRes {
+		defer c.Close()
+
+		buf, _ := json.Marshal(clientCtlRes)
+		err = c.Write(string(buf) + "\n")
+		if err != nil {
+			log.Warn("Write error, %v", err)
+			time.Sleep(1 * time.Second)
+			return
+		}
+	} else {
+		// work conn, just return
+		return
+	}
+
+	// other messages is from server to client
+	s, ok := server.ProxyServers[clientCtlReq.ProxyName]
+	if !ok {
+		log.Warn("ProxyName [%s] is not exist", clientCtlReq.ProxyName)
+		return
+	}
+
+	// read control msg from client
+	go readControlMsgFromClient(s, c)
+
+	serverCtlReq := &msg.ClientCtlReq{}
+	serverCtlReq.Type = consts.WorkConn
+	for {
+		closeFlag := s.WaitUserConn()
+		if closeFlag {
+			log.Debug("ProxyName [%s], goroutine for dealing user conn is closed", s.Name)
+			break
+		}
+		buf, _ := json.Marshal(serverCtlReq)
+		err = c.Write(string(buf) + "\n")
+		if err != nil {
+			log.Warn("ProxyName [%s], write to client error, proxy exit", s.Name)
+			s.Close()
+			return
+		}
+
+		log.Debug("ProxyName [%s], write to client to add work conn success", s.Name)
+	}
+
+	log.Info("ProxyName [%s], I'm dead!", s.Name)
+	return
+}
+
+func checkProxy(req *msg.ClientCtlReq, c *conn.Conn) (succ bool, info string, needRes bool) {
+	succ = false
+	needRes = true
+	// check if proxy name exist
+	s, ok := server.ProxyServers[req.ProxyName]
+	if !ok {
+		info = fmt.Sprintf("ProxyName [%s] is not exist", req.ProxyName)
+		log.Warn(info)
+		return
+	}
+
+	// check password
+	if req.Passwd != s.Passwd {
+		info = fmt.Sprintf("ProxyName [%s], password is not correct", req.ProxyName)
+		log.Warn(info)
+		return
+	}
+
+	// control conn
+	if req.Type == consts.CtlConn {
+		if s.Status != consts.Idle {
+			info = fmt.Sprintf("ProxyName [%s], already in use", req.ProxyName)
+			log.Warn(info)
+			return
+		}
+
+		// start proxy and listen for user conn, no block
+		err := s.Start()
+		if err != nil {
+			info = fmt.Sprintf("ProxyName [%s], start proxy error: %v", req.ProxyName, err.Error())
+			log.Warn(info)
+			return
+		}
+
+		log.Info("ProxyName [%s], start proxy success", req.ProxyName)
+	} else if req.Type == consts.WorkConn {
+		// work conn
+		needRes = false
+		if s.Status != consts.Working {
+			log.Warn("ProxyName [%s], is not working when it gets one new work conn", req.ProxyName)
+			return
+		}
+
+		s.GetNewCliConn(c)
+	} else {
+		info = fmt.Sprintf("ProxyName [%s], type [%d] unsupport", req.ProxyName, req.Type)
+		log.Warn(info)
+		return
+	}
+
+	succ = true
+	return
+}
+
+func readControlMsgFromClient(s *server.ProxyServer, c *conn.Conn) {
+	isContinueRead := true
+	f := func() {
+		isContinueRead = false
+		s.Close()
+		log.Error("ProxyName [%s], client heartbeat timeout", s.Name)
+	}
+	timer := time.AfterFunc(time.Duration(server.HeartBeatTimeout)*time.Second, f)
+	defer timer.Stop()
+
+	for isContinueRead {
+		content, err := c.ReadLine()
+		if err != nil {
+			if err == io.EOF {
+				log.Warn("ProxyName [%s], client is dead!", s.Name)
+				s.Close()
+				break
+			} else if nil == c || c.IsClosed() {
+				log.Warn("ProxyName [%s], client connection is closed", s.Name)
+				break
+			}
+
+			log.Error("ProxyName [%s], read error: %v", s.Name, err)
+			continue
+		}
+
+		clientCtlReq := &msg.ClientCtlReq{}
+		if err := json.Unmarshal([]byte(content), clientCtlReq); err != nil {
+			log.Warn("Parse err: %v : %s", err, content)
+			continue
+		}
+		if consts.CSHeartBeatReq == clientCtlReq.Type {
+			log.Debug("ProxyName [%s], get heartbeat", s.Name)
+			timer.Reset(time.Duration(server.HeartBeatTimeout) * time.Second)
+
+			clientCtlRes := &msg.ClientCtlRes{}
+			clientCtlRes.GeneralRes.Code = consts.SCHeartBeatRes
+			response, err := json.Marshal(clientCtlRes)
+			if err != nil {
+				log.Warn("Serialize ClientCtlRes err! err: %v", err)
+				continue
+			}
+
+			err = c.Write(string(response) + "\n")
+			if err != nil {
+				log.Error("Send heartbeat response to client failed! Err:%v", err)
+				continue
+			}
+		}
+	}
+}

cmd/frps/main.go → src/frp/cmd/frps/main.go

@@ -3,19 +3,20 @@ package main
 import (
 	"os"
 
-	"frp/pkg/utils/log"
-	"frp/pkg/utils/conn"
+	"frp/models/server"
+	"frp/utils/conn"
+	"frp/utils/log"
 )
 
 func main() {
-	err := LoadConf("./frps.ini")
+	err := server.LoadConf("./frps.ini")
 	if err != nil {
 		os.Exit(-1)
 	}
 
-	log.InitLog(LogWay, LogFile, LogLevel)
+	log.InitLog(server.LogWay, server.LogFile, server.LogLevel)
 
-	l, err := conn.Listen(BindAddr, BindPort)
+	l, err := conn.Listen(server.BindAddr, server.BindPort)
 	if err != nil {
 		log.Error("Create listener error, %v", err)
 		os.Exit(-1)

pkg/models/client.go → src/frp/models/client/client.go

@@ -1,21 +1,22 @@
-package models
+package client
 
 import (
 	"encoding/json"
 
-	"frp/pkg/utils/conn"
-	"frp/pkg/utils/log"
+	"frp/models/consts"
+	"frp/models/msg"
+	"frp/utils/conn"
+	"frp/utils/log"
 )
 
 type ProxyClient struct {
-	Name		string
-	Passwd		string
-	LocalPort	int64
+	Name      string
+	Passwd    string
+	LocalPort int64
 }
 
 func (p *ProxyClient) GetLocalConn() (c *conn.Conn, err error) {
-	c = &conn.Conn{}
-	err = c.ConnectServer("127.0.0.1", p.LocalPort)
+	c, err = conn.ConnectServer("127.0.0.1", p.LocalPort)
 	if err != nil {
 		log.Error("ProxyName [%s], connect to local port error, %v", p.Name, err)
 	}
@@ -23,23 +24,22 @@ func (p *ProxyClient) GetLocalConn() (c *conn.Conn, err error) {
 }
 
 func (p *ProxyClient) GetRemoteConn(addr string, port int64) (c *conn.Conn, err error) {
-	c = &conn.Conn{}
-	defer func(){
+	defer func() {
 		if err != nil {
 			c.Close()
 		}
 	}()
 
-	err = c.ConnectServer(addr, port)
+	c, err = conn.ConnectServer(addr, port)
 	if err != nil {
 		log.Error("ProxyName [%s], connect to server [%s:%d] error, %v", p.Name, addr, port, err)
 		return
 	}
 
-	req := &ClientCtlReq{
-		Type:		WorkConn,
-		ProxyName:	p.Name,
-		Passwd:		p.Passwd,
+	req := &msg.ClientCtlReq{
+		Type:      consts.WorkConn,
+		ProxyName: p.Name,
+		Passwd:    p.Passwd,
 	}
 
 	buf, _ := json.Marshal(req)
@@ -63,8 +63,9 @@ func (p *ProxyClient) StartTunnel(serverAddr string, serverPort int64) (err erro
 		return
 	}
 
+	// l means local, r means remote
 	log.Debug("Join two conns, (l[%s] r[%s]) (l[%s] r[%s])", localConn.GetLocalAddr(), localConn.GetRemoteAddr(),
-			remoteConn.GetLocalAddr(), remoteConn.GetRemoteAddr())
+		remoteConn.GetLocalAddr(), remoteConn.GetRemoteAddr())
 	go conn.Join(localConn, remoteConn)
 	return nil
 }

cmd/frpc/config.go → src/frp/models/client/config.go

@@ -1,25 +1,24 @@
-package main
+package client
 
 import (
 	"fmt"
 	"strconv"
 
-	"frp/pkg/models"
-
 	ini "github.com/vaughan0/go-ini"
 )
 
 // common config
 var (
-	ServerAddr	string = "0.0.0.0"
-	ServerPort	int64  = 7000
-	LogFile		string = "./frpc.log"
-	LogLevel	string = "warn"
-	LogWay		string = "file"
+	ServerAddr        string = "0.0.0.0"
+	ServerPort        int64  = 7000
+	LogFile           string = "./frpc.log"
+	LogLevel          string = "warn"
+	LogWay            string = "file"
+	HeartBeatInterval int64  = 5
+	HeartBeatTimeout  int64  = 30
 )
 
-var ProxyClients map[string]*models.ProxyClient = make(map[string]*models.ProxyClient)
-
+var ProxyClients map[string]*ProxyClient = make(map[string]*ProxyClient)
 
 func LoadConf(confFile string) (err error) {
 	var tmpStr string
@@ -59,7 +58,7 @@ func LoadConf(confFile string) (err error) {
 	// servers
 	for name, section := range conf {
 		if name != "common" {
-			proxyClient := &models.ProxyClient{}
+			proxyClient := &ProxyClient{}
 			proxyClient.Name = name
 
 			proxyClient.Passwd, ok = section["passwd"]

src/frp/models/consts/consts.go

@@ -0,0 +1,23 @@
+package consts
+
+// server status
+const (
+	Idle = iota
+	Working
+)
+
+// connection type
+const (
+	CtlConn = iota
+	WorkConn
+)
+
+// msg from client to server
+const (
+	CSHeartBeatReq = 1
+)
+
+// msg from server to client
+const (
+	SCHeartBeatRes = 100
+)

src/frp/models/msg/msg.go

@@ -0,0 +1,20 @@
+package msg
+
+type GeneralRes struct {
+	Code int64  `json:"code"`
+	Msg  string `json:"msg"`
+}
+
+type ClientCtlReq struct {
+	Type      int64  `json:"type"`
+	ProxyName string `json:"proxy_name"`
+	Passwd    string `json:"passwd"`
+}
+
+type ClientCtlRes struct {
+	GeneralRes
+}
+
+type ServerCtlReq struct {
+	Type int64 `json:"type"`
+}

cmd/frps/config.go → src/frp/models/server/config.go

@@ -1,25 +1,24 @@
-package main
+package server
 
 import (
 	"fmt"
 	"strconv"
 
-	"frp/pkg/models"
-
 	ini "github.com/vaughan0/go-ini"
 )
 
 // common config
 var (
-	BindAddr	string = "0.0.0.0"
-	BindPort	int64  = 9527
-	LogFile		string = "./frps.log"
-	LogLevel	string = "warn"
-	LogWay		string = "file"
+	BindAddr         string = "0.0.0.0"
+	BindPort         int64  = 9527
+	LogFile          string = "./frps.log"
+	LogLevel         string = "warn"
+	LogWay           string = "file"
+	HeartBeatTimeout int64  = 30
+	UserConnTimeout  int64  = 10
 )
 
-var ProxyServers map[string]*models.ProxyServer = make(map[string]*models.ProxyServer)
-
+var ProxyServers map[string]*ProxyServer = make(map[string]*ProxyServer)
 
 func LoadConf(confFile string) (err error) {
 	var tmpStr string
@@ -59,7 +58,7 @@ func LoadConf(confFile string) (err error) {
 	// servers
 	for name, section := range conf {
 		if name != "common" {
-			proxyServer := &models.ProxyServer{}
+			proxyServer := &ProxyServer{}
 			proxyServer.Name = name
 
 			proxyServer.Passwd, ok = section["passwd"]

src/frp/models/server/server.go

@@ -0,0 +1,150 @@
+package server
+
+import (
+	"container/list"
+	"sync"
+	"time"
+
+	"frp/models/consts"
+	"frp/utils/conn"
+	"frp/utils/log"
+)
+
+type ProxyServer struct {
+	Name       string
+	Passwd     string
+	BindAddr   string
+	ListenPort int64
+	Status     int64
+
+	listener     *conn.Listener  // accept new connection from remote users
+	ctlMsgChan   chan int64      // every time accept a new user conn, put "1" to the channel
+	cliConnChan  chan *conn.Conn // get client conns from control goroutine
+	userConnList *list.List      // store user conns
+	mutex        sync.Mutex
+}
+
+func (p *ProxyServer) Init() {
+	p.Status = consts.Idle
+	p.cliConnChan = make(chan *conn.Conn)
+	p.ctlMsgChan = make(chan int64)
+	p.userConnList = list.New()
+}
+
+func (p *ProxyServer) Lock() {
+	p.mutex.Lock()
+}
+
+func (p *ProxyServer) Unlock() {
+	p.mutex.Unlock()
+}
+
+// start listening for user conns
+func (p *ProxyServer) Start() (err error) {
+	p.Init()
+	p.listener, err = conn.Listen(p.BindAddr, p.ListenPort)
+	if err != nil {
+		return err
+	}
+
+	p.Status = consts.Working
+
+	// start a goroutine for listener to accept user connection
+	go func() {
+		for {
+			// block
+			// if listener is closed, err returned
+			c, err := p.listener.GetConn()
+			if err != nil {
+				log.Info("ProxyName [%s], listener is closed", p.Name)
+				return
+			}
+			log.Debug("ProxyName [%s], get one new user conn [%s]", p.Name, c.GetRemoteAddr())
+
+			// insert into list
+			p.Lock()
+			if p.Status != consts.Working {
+				log.Debug("ProxyName [%s] is not working, new user conn close", p.Name)
+				c.Close()
+				p.Unlock()
+				return
+			}
+			p.userConnList.PushBack(c)
+			p.Unlock()
+
+			// put msg to control conn
+			p.ctlMsgChan <- 1
+
+			// set timeout
+			time.AfterFunc(time.Duration(UserConnTimeout)*time.Second, func() {
+				p.Lock()
+				defer p.Unlock()
+				element := p.userConnList.Front()
+				if element == nil {
+					return
+				}
+
+				userConn := element.Value.(*conn.Conn)
+				if userConn == c {
+					log.Warn("ProxyName [%s], user conn [%s] timeout", p.Name, c.GetRemoteAddr())
+				}
+			})
+		}
+	}()
+
+	// start another goroutine for join two conns from client and user
+	go func() {
+		for {
+			cliConn, ok := <-p.cliConnChan
+			if !ok {
+				return
+			}
+
+			p.Lock()
+			element := p.userConnList.Front()
+
+			var userConn *conn.Conn
+			if element != nil {
+				userConn = element.Value.(*conn.Conn)
+				p.userConnList.Remove(element)
+			} else {
+				cliConn.Close()
+				p.Unlock()
+				continue
+			}
+			p.Unlock()
+
+			// msg will transfer to another without modifying
+			// l means local, r means remote
+			log.Debug("Join two conns, (l[%s] r[%s]) (l[%s] r[%s])", cliConn.GetLocalAddr(), cliConn.GetRemoteAddr(),
+				userConn.GetLocalAddr(), userConn.GetRemoteAddr())
+			go conn.Join(cliConn, userConn)
+		}
+	}()
+
+	return nil
+}
+
+func (p *ProxyServer) Close() {
+	p.Lock()
+	p.Status = consts.Idle
+	p.listener.Close()
+	close(p.ctlMsgChan)
+	close(p.cliConnChan)
+	p.userConnList = list.New()
+	p.Unlock()
+}
+
+func (p *ProxyServer) WaitUserConn() (closeFlag bool) {
+	closeFlag = false
+
+	_, ok := <-p.ctlMsgChan
+	if !ok {
+		closeFlag = true
+	}
+	return
+}
+
+func (p *ProxyServer) GetNewCliConn(c *conn.Conn) {
+	p.cliConnChan <- c
+}

src/frp/utils/broadcast/broadcast.go

@@ -0,0 +1,73 @@
+package broadcast
+
+type Broadcast struct {
+	listeners  []chan interface{}
+	reg        chan (chan interface{})
+	unreg      chan (chan interface{})
+	in         chan interface{}
+	stop       chan int64
+	stopStatus bool
+}
+
+func NewBroadcast() *Broadcast {
+	b := &Broadcast{
+		listeners:  make([]chan interface{}, 0),
+		reg:        make(chan (chan interface{})),
+		unreg:      make(chan (chan interface{})),
+		in:         make(chan interface{}),
+		stop:       make(chan int64),
+		stopStatus: false,
+	}
+
+	go func() {
+		for {
+			select {
+			case l := <-b.unreg:
+				// remove L from b.listeners
+				// this operation is slow: O(n) but not used frequently
+				// unlike iterating over listeners
+				oldListeners := b.listeners
+				b.listeners = make([]chan interface{}, 0, len(oldListeners))
+				for _, oldL := range oldListeners {
+					if l != oldL {
+						b.listeners = append(b.listeners, oldL)
+					}
+				}
+
+			case l := <-b.reg:
+				b.listeners = append(b.listeners, l)
+
+			case item := <-b.in:
+				for _, l := range b.listeners {
+					l <- item
+				}
+
+			case _ = <-b.stop:
+				b.stopStatus = true
+				break
+			}
+		}
+	}()
+
+	return b
+}
+
+func (b *Broadcast) In() chan interface{} {
+	return b.in
+}
+
+func (b *Broadcast) Reg() chan interface{} {
+	listener := make(chan interface{})
+	b.reg <- listener
+	return listener
+}
+
+func (b *Broadcast) UnReg(listener chan interface{}) {
+	b.unreg <- listener
+}
+
+func (b *Broadcast) Close() {
+	if b.stopStatus == false {
+		b.stop <- 1
+	}
+}

src/frp/utils/broadcast/broadcast_test.go

@@ -0,0 +1,63 @@
+package broadcast
+
+import (
+	"sync"
+	"testing"
+	"time"
+)
+
+var (
+	totalNum int = 5
+	succNum  int = 0
+	mutex    sync.Mutex
+)
+
+func TestBroadcast(t *testing.T) {
+	b := NewBroadcast()
+	if b == nil {
+		t.Errorf("New Broadcast error, nil return")
+	}
+	defer b.Close()
+
+	var wait sync.WaitGroup
+	wait.Add(totalNum)
+	for i := 0; i < totalNum; i++ {
+		go worker(b, &wait)
+	}
+
+	time.Sleep(1e6 * 20)
+	msg := "test"
+	b.In() <- msg
+
+	wait.Wait()
+	if succNum != totalNum {
+		t.Errorf("TotalNum %d, FailNum(timeout) %d", totalNum, totalNum-succNum)
+	}
+}
+
+func worker(b *Broadcast, wait *sync.WaitGroup) {
+	defer wait.Done()
+	msgChan := b.Reg()
+
+	// exit if nothing got in 2 seconds
+	timeout := make(chan bool, 1)
+	go func() {
+		time.Sleep(time.Duration(2) * time.Second)
+		timeout <- true
+	}()
+
+	select {
+	case item := <-msgChan:
+		msg := item.(string)
+		if msg == "test" {
+			mutex.Lock()
+			succNum++
+			mutex.Unlock()
+		} else {
+			break
+		}
+
+	case <-timeout:
+		break
+	}
+}

pkg/utils/conn/conn.go → src/frp/utils/conn/conn.go

@@ -1,43 +1,97 @@
 package conn
 
 import (
+	"bufio"
 	"fmt"
+	"io"
 	"net"
-	"bufio"
 	"sync"
-	"io"
 
-	"frp/pkg/utils/log"
+	"frp/utils/log"
 )
 
 type Listener struct {
-	Addr	net.Addr
-	Conns	chan *Conn
+	addr      net.Addr
+	l         *net.TCPListener
+	conns     chan *Conn
+	closeFlag bool
+}
+
+func Listen(bindAddr string, bindPort int64) (l *Listener, err error) {
+	tcpAddr, err := net.ResolveTCPAddr("tcp4", fmt.Sprintf("%s:%d", bindAddr, bindPort))
+	listener, err := net.ListenTCP("tcp", tcpAddr)
+	if err != nil {
+		return l, err
+	}
+
+	l = &Listener{
+		addr:      listener.Addr(),
+		l:         listener,
+		conns:     make(chan *Conn),
+		closeFlag: false,
+	}
+
+	go func() {
+		for {
+			conn, err := l.l.AcceptTCP()
+			if err != nil {
+				if l.closeFlag {
+					return
+				}
+				continue
+			}
+
+			c := &Conn{
+				TcpConn:   conn,
+				closeFlag: false,
+			}
+			c.Reader = bufio.NewReader(c.TcpConn)
+			l.conns <- c
+		}
+	}()
+	return l, err
 }
 
-// wait util get one
-func (l *Listener) GetConn() (conn *Conn) {
-	conn = <-l.Conns
-	return conn
+// wait util get one new connection or listener is closed
+// if listener is closed, err returned
+func (l *Listener) GetConn() (conn *Conn, err error) {
+	var ok bool
+	conn, ok = <-l.conns
+	if !ok {
+		return conn, fmt.Errorf("channel close")
+	}
+	return conn, nil
+}
+
+func (l *Listener) Close() {
+	if l.l != nil && l.closeFlag == false {
+		l.closeFlag = true
+		l.l.Close()
+		close(l.conns)
+	}
 }
 
+// wrap for TCPConn
 type Conn struct {
-	TcpConn		*net.TCPConn
-	Reader		*bufio.Reader
+	TcpConn   *net.TCPConn
+	Reader    *bufio.Reader
+	closeFlag bool
 }
 
-func (c *Conn) ConnectServer(host string, port int64) (err error) {
+func ConnectServer(host string, port int64) (c *Conn, err error) {
+	c = &Conn{}
 	servertAddr, err := net.ResolveTCPAddr("tcp4", fmt.Sprintf("%s:%d", host, port))
 	if err != nil {
-		return err
+		return
 	}
 	conn, err := net.DialTCP("tcp", nil, servertAddr)
 	if err != nil {
-		return err
+		return
 	}
 	c.TcpConn = conn
 	c.Reader = bufio.NewReader(c.TcpConn)
-	return nil
+	c.closeFlag = false
+	return c, nil
 }
 
 func (c *Conn) GetRemoteAddr() (addr string) {
@@ -50,6 +104,9 @@ func (c *Conn) GetLocalAddr() (addr string) {
 
 func (c *Conn) ReadLine() (buff string, err error) {
 	buff, err = c.Reader.ReadString('\n')
+	if err == io.EOF {
+		c.closeFlag = true
+	}
 	return buff, err
 }
 
@@ -59,40 +116,17 @@ func (c *Conn) Write(content string) (err error) {
 }
 
 func (c *Conn) Close() {
-	c.TcpConn.Close()
-}
-
-func Listen(bindAddr string, bindPort int64) (l *Listener, err error) {
-	tcpAddr, err := net.ResolveTCPAddr("tcp4", fmt.Sprintf("%s:%d", bindAddr, bindPort))
-	listener, err := net.ListenTCP("tcp", tcpAddr)
-	if err != nil {
-		return l, err
-	}
-
-	l = &Listener{
-		Addr:	listener.Addr(),
-		Conns:	make(chan *Conn),
+	if c.TcpConn != nil && c.closeFlag == false {
+		c.closeFlag = true
+		c.TcpConn.Close()
 	}
+}
 
-	go func() {
-		for {
-			conn, err := listener.AcceptTCP()
-			if err != nil {
-				log.Error("Accept new tcp connection error, %v", err)
-				continue
-			}
-
-			c := &Conn{
-				TcpConn:	conn,
-			}
-			c.Reader = bufio.NewReader(c.TcpConn)
-			l.Conns <- c
-		}
-	}()
-	return l, err
+func (c *Conn) IsClosed() bool {
+	return c.closeFlag
 }
 
-// will block until conn close
+// will block until connection close
 func Join(c1 *Conn, c2 *Conn) {
 	var wait sync.WaitGroup
 	pipe := func(to *Conn, from *Conn) {

pkg/utils/log/log.go → src/frp/utils/log/log.go

@@ -22,7 +22,7 @@ func SetLogFile(logWay string, logFile string) {
 	if logWay == "console" {
 		Log.SetLogger("console", "")
 	} else {
-		Log.SetLogger("file", `{"filename": "` + logFile + `"}`)
+		Log.SetLogger("file", `{"filename": "`+logFile+`"}`)
 	}
 }
 

src/frp/utils/pcrypto/pcrypto.go

@@ -0,0 +1,87 @@
+package pcrypto
+
+import (
+	"bytes"
+	"compress/gzip"
+	"crypto/aes"
+	"crypto/cipher"
+	"encoding/base64"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"io/ioutil"
+)
+
+type Pcrypto struct {
+	pkey []byte
+	paes cipher.Block
+}
+
+func (pc *Pcrypto) Init(key []byte) error {
+	var err error
+	pc.pkey = PKCS7Padding(key, aes.BlockSize)
+	pc.paes, err = aes.NewCipher(pc.pkey)
+
+	return err
+}
+
+func (pc *Pcrypto) Encrypto(src []byte) ([]byte, error) {
+	// aes
+	src = PKCS7Padding(src, aes.BlockSize)
+	blockMode := cipher.NewCBCEncrypter(pc.paes, pc.pkey)
+	crypted := make([]byte, len(src))
+	blockMode.CryptBlocks(crypted, src)
+
+	// gzip
+	var zbuf bytes.Buffer
+	zwr := gzip.NewWriter(&zbuf)
+	defer zwr.Close()
+	zwr.Write(crypted)
+	zwr.Flush()
+
+	// base64
+	return []byte(base64.StdEncoding.EncodeToString(zbuf.Bytes())), nil
+}
+
+func (pc *Pcrypto) Decrypto(str []byte) ([]byte, error) {
+	// base64
+	data, err := base64.StdEncoding.DecodeString(string(str))
+	if err != nil {
+		return nil, err
+	}
+
+	// gunzip
+	zbuf := bytes.NewBuffer(data)
+	zrd, _ := gzip.NewReader(zbuf)
+	defer zrd.Close()
+	data, _ = ioutil.ReadAll(zrd)
+
+	// aes
+	decryptText, err := hex.DecodeString(fmt.Sprintf("%x", data))
+	if err != nil {
+		return nil, err
+	}
+
+	if len(decryptText)%aes.BlockSize != 0 {
+		return nil, errors.New("crypto/cipher: ciphertext is not a multiple of the block size")
+	}
+
+	blockMode := cipher.NewCBCDecrypter(pc.paes, pc.pkey)
+
+	blockMode.CryptBlocks(decryptText, decryptText)
+	decryptText = PKCS7UnPadding(decryptText)
+
+	return decryptText, nil
+}
+
+func PKCS7Padding(ciphertext []byte, blockSize int) []byte {
+	padding := blockSize - len(ciphertext)%blockSize
+	padtext := bytes.Repeat([]byte{byte(padding)}, padding)
+	return append(ciphertext, padtext...)
+}
+
+func PKCS7UnPadding(origData []byte) []byte {
+	length := len(origData)
+	unpadding := int(origData[length-1])
+	return origData[:(length - unpadding)]
+}

src/frp/utils/pcrypto/pcrypto_test.go

@@ -0,0 +1,47 @@
+package pcrypto
+
+import (
+	"crypto/aes"
+	"fmt"
+	"testing"
+)
+
+func TestEncrypto(t *testing.T) {
+	pp := new(Pcrypto)
+	pp.Init([]byte("Hana"))
+	res, err := pp.Encrypto([]byte("Just One Test!"))
+	if err != nil {
+		t.Error(err)
+	}
+
+	fmt.Printf("[%x]\n", res)
+}
+
+func TestDecrypto(t *testing.T) {
+	pp := new(Pcrypto)
+	pp.Init([]byte("Hana"))
+	res, err := pp.Encrypto([]byte("Just One Test!"))
+	if err != nil {
+		t.Error(err)
+	}
+
+	res, err = pp.Decrypto(res)
+	if err != nil {
+		t.Error(err)
+	}
+
+	fmt.Printf("[%s]\n", string(res))
+}
+
+func TestPKCS7Padding(t *testing.T) {
+	ltt := []byte("Test_PKCS7Padding")
+	ltt = PKCS7Padding(ltt, aes.BlockSize)
+	fmt.Printf("[%x]\n", (ltt))
+}
+
+func TestPKCS7UnPadding(t *testing.T) {
+	ltt := []byte("Test_PKCS7Padding")
+	ltt = PKCS7Padding(ltt, aes.BlockSize)
+	ltt = PKCS7UnPadding(ltt)
+	fmt.Printf("[%x]\n", ltt)
+}