(1)优化重连和心跳检测

pkg/models/server.go

@@ -1,8 +1,8 @@
 package models
 
 import (
-	"sync"
 	"container/list"
+	"sync"
 
 	"frp/pkg/utils/conn"
 	"frp/pkg/utils/log"
@@ -14,22 +14,24 @@ const (
 )
 
 type ProxyServer struct {
-	Name			string
-	Passwd			string
-	BindAddr		string
-	ListenPort		int64
+	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
+	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
+	StopBlockChan chan int64      // put any number to the channel, if you want to stop wait user conn
+	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.StopBlockChan = make(chan int64)
 	p.CliConnChan = make(chan *conn.Conn)
 	p.UserConnList = list.New()
 }
@@ -55,7 +57,7 @@ func (p *ProxyServer) Start() (err error) {
 	go func() {
 		for {
 			// block
-			c := p.Listener.GetConn()	
+			c := p.Listener.GetConn()
 			log.Debug("ProxyName [%s], get one new user conn [%s]", p.Name, c.GetRemoteAddr())
 
 			// put to list
@@ -93,7 +95,7 @@ func (p *ProxyServer) Start() (err error) {
 
 			// 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())
+				userConn.GetLocalAddr(), userConn.GetRemoteAddr())
 			go conn.Join(cliConn, userConn)
 		}
 	}()
@@ -110,7 +112,15 @@ func (p *ProxyServer) Close() {
 	p.Unlock()
 }
 
-func (p *ProxyServer) WaitUserConn() (res int64) {
-	res = <-p.CtlMsgChan
-	return 
+func (p *ProxyServer) WaitUserConn() (res int64, isStop bool) {
+	select {
+	case res = <-p.CtlMsgChan:
+		return res, false
+	case <-p.StopBlockChan:
+		return 0, true
+	}
+}
+
+func (p *ProxyServer) StopWaitUserConn() {
+	p.StopBlockChan <- 1
 }

pkg/utils/conn/conn.go

@@ -1,18 +1,18 @@
 package conn
 
 import (
-	"fmt"
-	"net"
 	"bufio"
-	"sync"
+	"fmt"
 	"io"
+	"net"
+	"sync"
 
 	"frp/pkg/utils/log"
 )
 
 type Listener struct {
-	Addr	net.Addr
-	Conns	chan *Conn
+	Addr  net.Addr
+	Conns chan *Conn
 }
 
 // wait util get one
@@ -22,8 +22,8 @@ func (l *Listener) GetConn() (conn *Conn) {
 }
 
 type Conn struct {
-	TcpConn		*net.TCPConn
-	Reader		*bufio.Reader
+	TcpConn *net.TCPConn
+	Reader  *bufio.Reader
 }
 
 func (c *Conn) ConnectServer(host string, port int64) (err error) {
@@ -59,7 +59,9 @@ func (c *Conn) Write(content string) (err error) {
 }
 
 func (c *Conn) Close() {
-	c.TcpConn.Close()
+	if c.TcpConn != nil { // ZWF:我觉得应该加一个非空保护
+		c.TcpConn.Close()
+	}
 }
 
 func Listen(bindAddr string, bindPort int64) (l *Listener, err error) {
@@ -70,8 +72,8 @@ func Listen(bindAddr string, bindPort int64) (l *Listener, err error) {
 	}
 
 	l = &Listener{
-		Addr:	listener.Addr(),
-		Conns:	make(chan *Conn),
+		Addr:  listener.Addr(),
+		Conns: make(chan *Conn),
 	}
 
 	go func() {
@@ -83,7 +85,7 @@ func Listen(bindAddr string, bindPort int64) (l *Listener, err error) {
 			}
 
 			c := &Conn{
-				TcpConn:	conn,
+				TcpConn: conn,
 			}
 			c.Reader = bufio.NewReader(c.TcpConn)
 			l.Conns <- c