all: improve the method of import for internal packages

1. Change directory structure and Makefile to let GOPATH=`pwd`, so wherever the project directory is, just use make to build.

src/frp/cmd/frpc/control.go

@@ -0,0 +1,117 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"sync"
+	"time"
+
+	"frp/models/client"
+	"frp/models/consts"
+	"frp/models/msg"
+	"frp/utils/conn"
+	"frp/utils/log"
+)
+
+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
+	}
+	defer c.Close()
+
+	for {
+		// ignore response content now
+		_, err := c.ReadLine()
+		if err == io.EOF {
+			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 {
+					c.Close()
+					c = 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
+		}
+
+		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) {
+	log.Debug("Start to send heartbeat")
+	for {
+		time.Sleep(time.Duration(client.HeartBeatInterval) * time.Second)
+		if !c.IsClosed() {
+			err := c.Write("\n")
+			if err != nil {
+				log.Error("Send hearbeat to server failed! Err:%s", err.Error())
+				continue
+			}
+		} else {
+			break
+		}
+	}
+	log.Debug("heartbeat exit")
+}

src/frp/cmd/frpc/main.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"os"
+	"sync"
+
+	"frp/models/client"
+	"frp/utils/log"
+)
+
+func main() {
+	err := client.LoadConf("./frpc.ini")
+	if err != nil {
+		os.Exit(-1)
+	}
+
+	log.InitLog(client.LogWay, client.LogFile, client.LogLevel)
+
+	// wait until all control goroutine exit
+	var wait sync.WaitGroup
+	wait.Add(len(client.ProxyClients))
+
+	for _, client := range client.ProxyClients {
+		go ControlProcess(client, &wait)
+	}
+
+	log.Info("Start frpc success")
+
+	wait.Wait()
+	log.Warn("All proxy exit!")
+}

src/frp/cmd/frps/control.go

@@ -0,0 +1,183 @@
+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 {
+		_, err := c.ReadLine()
+		if err != nil {
+			if err == io.EOF {
+				log.Warn("ProxyName [%s], client is dead!", s.Name)
+				s.Close()
+				break
+			} else if c.IsClosed() {
+				log.Warn("ProxyName [%s], client connection is closed", s.Name)
+				break
+			}
+
+			log.Error("ProxyName [%s], read error: %v", s.Name, err)
+			continue
+		}
+		log.Debug("ProxyName [%s], get heartbeat", s.Name)
+
+		timer.Reset(time.Duration(server.HeartBeatTimeout) * time.Second)
+	}
+}

src/frp/cmd/frps/main.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"os"
+
+	"frp/models/server"
+	"frp/utils/conn"
+	"frp/utils/log"
+)
+
+func main() {
+	err := server.LoadConf("./frps.ini")
+	if err != nil {
+		os.Exit(-1)
+	}
+
+	log.InitLog(server.LogWay, server.LogFile, server.LogLevel)
+
+	l, err := conn.Listen(server.BindAddr, server.BindPort)
+	if err != nil {
+		log.Error("Create listener error, %v", err)
+		os.Exit(-1)
+	}
+
+	log.Info("Start frps success")
+	ProcessControlConn(l)
+}

src/frp/models/client/client.go

@@ -0,0 +1,71 @@
+package client
+
+import (
+	"encoding/json"
+
+	"frp/models/consts"
+	"frp/models/msg"
+	"frp/utils/conn"
+	"frp/utils/log"
+)
+
+type ProxyClient struct {
+	Name      string
+	Passwd    string
+	LocalPort int64
+}
+
+func (p *ProxyClient) GetLocalConn() (c *conn.Conn, err error) {
+	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)
+	}
+	return
+}
+
+func (p *ProxyClient) GetRemoteConn(addr string, port int64) (c *conn.Conn, err error) {
+	defer func() {
+		if err != nil {
+			c.Close()
+		}
+	}()
+
+	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 := &msg.ClientCtlReq{
+		Type:      consts.WorkConn,
+		ProxyName: p.Name,
+		Passwd:    p.Passwd,
+	}
+
+	buf, _ := json.Marshal(req)
+	err = c.Write(string(buf) + "\n")
+	if err != nil {
+		log.Error("ProxyName [%s], write to server error, %v", p.Name, err)
+		return
+	}
+
+	err = nil
+	return
+}
+
+func (p *ProxyClient) StartTunnel(serverAddr string, serverPort int64) (err error) {
+	localConn, err := p.GetLocalConn()
+	if err != nil {
+		return
+	}
+	remoteConn, err := p.GetRemoteConn(serverAddr, serverPort)
+	if err != nil {
+		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())
+	go conn.Join(localConn, remoteConn)
+	return nil
+}

src/frp/models/client/config.go

@@ -0,0 +1,87 @@
+package client
+
+import (
+	"fmt"
+	"strconv"
+
+	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"
+	HeartBeatInterval int64  = 5
+)
+
+var ProxyClients map[string]*ProxyClient = make(map[string]*ProxyClient)
+
+func LoadConf(confFile string) (err error) {
+	var tmpStr string
+	var ok bool
+
+	conf, err := ini.LoadFile(confFile)
+	if err != nil {
+		return err
+	}
+
+	// common
+	tmpStr, ok = conf.Get("common", "server_addr")
+	if ok {
+		ServerAddr = tmpStr
+	}
+
+	tmpStr, ok = conf.Get("common", "server_port")
+	if ok {
+		ServerPort, _ = strconv.ParseInt(tmpStr, 10, 64)
+	}
+
+	tmpStr, ok = conf.Get("common", "log_file")
+	if ok {
+		LogFile = tmpStr
+	}
+
+	tmpStr, ok = conf.Get("common", "log_level")
+	if ok {
+		LogLevel = tmpStr
+	}
+
+	tmpStr, ok = conf.Get("common", "log_way")
+	if ok {
+		LogWay = tmpStr
+	}
+
+	// servers
+	for name, section := range conf {
+		if name != "common" {
+			proxyClient := &ProxyClient{}
+			proxyClient.Name = name
+
+			proxyClient.Passwd, ok = section["passwd"]
+			if !ok {
+				return fmt.Errorf("Parse ini file error: proxy [%s] no passwd found", proxyClient.Name)
+			}
+
+			portStr, ok := section["local_port"]
+			if ok {
+				proxyClient.LocalPort, err = strconv.ParseInt(portStr, 10, 64)
+				if err != nil {
+					return fmt.Errorf("Parse ini file error: proxy [%s] local_port error", proxyClient.Name)
+				}
+			} else {
+				return fmt.Errorf("Parse ini file error: proxy [%s] local_port not found", proxyClient.Name)
+			}
+
+			ProxyClients[proxyClient.Name] = proxyClient
+		}
+	}
+
+	if len(ProxyClients) == 0 {
+		return fmt.Errorf("Parse ini file error: no proxy config found")
+	}
+
+	return nil
+}

src/frp/models/consts/consts.go

@@ -0,0 +1,13 @@
+package consts
+
+// server status
+const (
+	Idle = iota
+	Working
+)
+
+// connection type
+const (
+	CtlConn = iota
+	WorkConn
+)

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"`
+}

src/frp/models/server/config.go

@@ -0,0 +1,94 @@
+package server
+
+import (
+	"fmt"
+	"strconv"
+
+	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"
+	HeartBeatTimeout int64  = 30
+	UserConnTimeout  int64  = 10
+)
+
+var ProxyServers map[string]*ProxyServer = make(map[string]*ProxyServer)
+
+func LoadConf(confFile string) (err error) {
+	var tmpStr string
+	var ok bool
+
+	conf, err := ini.LoadFile(confFile)
+	if err != nil {
+		return err
+	}
+
+	// common
+	tmpStr, ok = conf.Get("common", "bind_addr")
+	if ok {
+		BindAddr = tmpStr
+	}
+
+	tmpStr, ok = conf.Get("common", "bind_port")
+	if ok {
+		BindPort, _ = strconv.ParseInt(tmpStr, 10, 64)
+	}
+
+	tmpStr, ok = conf.Get("common", "log_file")
+	if ok {
+		LogFile = tmpStr
+	}
+
+	tmpStr, ok = conf.Get("common", "log_level")
+	if ok {
+		LogLevel = tmpStr
+	}
+
+	tmpStr, ok = conf.Get("common", "log_way")
+	if ok {
+		LogWay = tmpStr
+	}
+
+	// servers
+	for name, section := range conf {
+		if name != "common" {
+			proxyServer := &ProxyServer{}
+			proxyServer.Name = name
+
+			proxyServer.Passwd, ok = section["passwd"]
+			if !ok {
+				return fmt.Errorf("Parse ini file error: proxy [%s] no passwd found", proxyServer.Name)
+			}
+
+			proxyServer.BindAddr, ok = section["bind_addr"]
+			if !ok {
+				proxyServer.BindAddr = "0.0.0.0"
+			}
+
+			portStr, ok := section["listen_port"]
+			if ok {
+				proxyServer.ListenPort, err = strconv.ParseInt(portStr, 10, 64)
+				if err != nil {
+					return fmt.Errorf("Parse ini file error: proxy [%s] listen_port error", proxyServer.Name)
+				}
+			} else {
+				return fmt.Errorf("Parse ini file error: proxy [%s] listen_port not found", proxyServer.Name)
+			}
+
+			proxyServer.Init()
+			ProxyServers[proxyServer.Name] = proxyServer
+		}
+	}
+
+	if len(ProxyServers) == 0 {
+		return fmt.Errorf("Parse ini file error: no proxy config found")
+	}
+
+	return nil
+}

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
+	}
+}

src/frp/utils/conn/conn.go

@@ -0,0 +1,149 @@
+package conn
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"net"
+	"sync"
+
+	"frp/utils/log"
+)
+
+type Listener struct {
+	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 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
+	closeFlag bool
+}
+
+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
+	}
+	conn, err := net.DialTCP("tcp", nil, servertAddr)
+	if err != nil {
+		return
+	}
+	c.TcpConn = conn
+	c.Reader = bufio.NewReader(c.TcpConn)
+	c.closeFlag = false
+	return c, nil
+}
+
+func (c *Conn) GetRemoteAddr() (addr string) {
+	return c.TcpConn.RemoteAddr().String()
+}
+
+func (c *Conn) GetLocalAddr() (addr string) {
+	return c.TcpConn.LocalAddr().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
+}
+
+func (c *Conn) Write(content string) (err error) {
+	_, err = c.TcpConn.Write([]byte(content))
+	return err
+}
+
+func (c *Conn) Close() {
+	if c.TcpConn != nil && c.closeFlag == false {
+		c.closeFlag = true
+		c.TcpConn.Close()
+	}
+}
+
+func (c *Conn) IsClosed() bool {
+	return c.closeFlag
+}
+
+// will block until connection close
+func Join(c1 *Conn, c2 *Conn) {
+	var wait sync.WaitGroup
+	pipe := func(to *Conn, from *Conn) {
+		defer to.Close()
+		defer from.Close()
+		defer wait.Done()
+
+		var err error
+		_, err = io.Copy(to.TcpConn, from.TcpConn)
+		if err != nil {
+			log.Warn("join conns error, %v", err)
+		}
+	}
+
+	wait.Add(2)
+	go pipe(c1, c2)
+	go pipe(c2, c1)
+	wait.Wait()
+	return
+}

src/frp/utils/log/log.go

@@ -0,0 +1,64 @@
+package log
+
+import (
+	"github.com/astaxie/beego/logs"
+)
+
+var Log *logs.BeeLogger
+
+func init() {
+	Log = logs.NewLogger(1000)
+	Log.EnableFuncCallDepth(true)
+	Log.SetLogFuncCallDepth(Log.GetLogFuncCallDepth() + 1)
+}
+
+func InitLog(logWay string, logFile string, logLevel string) {
+	SetLogFile(logWay, logFile)
+	SetLogLevel(logLevel)
+}
+
+// logWay: such as file or console
+func SetLogFile(logWay string, logFile string) {
+	if logWay == "console" {
+		Log.SetLogger("console", "")
+	} else {
+		Log.SetLogger("file", `{"filename": "`+logFile+`"}`)
+	}
+}
+
+// value: error, warning, info, debug
+func SetLogLevel(logLevel string) {
+	level := 4 // warning
+
+	switch logLevel {
+	case "error":
+		level = 3
+	case "warn":
+		level = 4
+	case "info":
+		level = 6
+	case "debug":
+		level = 7
+	default:
+		level = 4
+	}
+
+	Log.SetLevel(level)
+}
+
+// wrap log
+func Error(format string, v ...interface{}) {
+	Log.Error(format, v...)
+}
+
+func Warn(format string, v ...interface{}) {
+	Log.Warn(format, v...)
+}
+
+func Info(format string, v ...interface{}) {
+	Log.Info(format, v...)
+}
+
+func Debug(format string, v ...interface{}) {
+	Log.Debug(format, v...)
+}

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)
+}