First available commit

pkg/models/client.go

@@ -0,0 +1,70 @@
+package models
+
+import (
+	"encoding/json"
+
+	"frp/pkg/utils/conn"
+	"frp/pkg/utils/log"
+)
+
+type ProxyClient struct {
+	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)
+	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) {
+	c = &conn.Conn{}
+	defer func(){
+		if err != nil {
+			c.Close()
+		}
+	}()
+
+	err = c.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,
+	}
+
+	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
+	}
+
+	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
+}

pkg/models/msg.go

@@ -0,0 +1,27 @@
+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

@@ -0,0 +1,116 @@
+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 
+}