add pipe

server/handleAgent.go

@@ -3,9 +3,19 @@ package server
 import (
 	"net/http"
 
+	"git.pyer.club/kingecg/gotunnelserver/util"
 	"github.com/gorilla/websocket"
 )
 
 func (s *Server) HandleAgent(c *websocket.Conn, r *http.Request) {
-
+	agentSession := NewSession(c)
+	agentSession.Start()
+	s.agentSession[agentSession.Id] = agentSession
+	command := &Command{
+		Type: util.NewSession,
+		Payload: map[string]string{
+			"id": agentSession.Id,
+		},
+	}
+	agentSession.Send(command)
 }

server/handleClient.go

@@ -7,5 +7,31 @@ import (
 )
 
 func (s *Server) HandleClient(conn *websocket.Conn, r *http.Request) {
-	conn.WriteMessage(websocket.TextMessage, []byte("hello"))
+	clientSession := NewSession(conn)
+	clientSession.Start()
+	s.clientSession[clientSession.Id] = clientSession
+	command := NcmdSession(clientSession.Id)
+	clientSession.Send(command)
+	clientSession.On("NewConnection", func(args ...interface{}) {
+		orgPlayload := args[0].(map[string]string) // orgPayload should include target, host and port field
+		targetSessionId, ok := orgPlayload["target"]
+
+		if !ok {
+			clientSession.Send(NewErrorResponse("target field is required", command))
+			return
+		}
+		targetSession := s.findSession(targetSessionId)
+		if targetSession == nil {
+			clientSession.Send(NewErrorResponse("target session not found", command))
+			return
+		}
+		command := NcmdConnectionInited(clientSession.Id)
+
+		for k, v := range orgPlayload {
+			command.Payload[k] = v
+		}
+		clientSession.Send(command)
+		targetSession.Send(command)
+
+	})
 }

server/handlePipe.go

@@ -6,6 +6,89 @@ import (
 	"github.com/gorilla/websocket"
 )
 
-func (s *Server) HandlePipe(conn *websocket.Conn, r *http.Request) {
-	conn.WriteMessage(websocket.TextMessage, []byte("hello"))
+type Pipe struct {
+	Id       string
+	Src      string
+	Dst      string
+	src      *websocket.Conn
+	dst      *websocket.Conn
+	stopChan chan int
+}
+
+func (p *Pipe) Start() {
+	p.stopChan = make(chan int)
+	go p.forward(p.src, p.dst)
+	go p.forward(p.dst, p.src)
+	<-p.stopChan
+	p.src.Close()
+	p.dst.Close()
+}
+
+func (p *Pipe) forward(src, dst *websocket.Conn) {
+	for {
+		mtype, message, err := src.ReadMessage()
+		if err != nil {
+
+			break
+		}
+		err = dst.WriteMessage(mtype, message)
+		if err != nil {
+
+			break
+		}
+	}
+	p.stopChan <- 1
+}
+
+func (s *Server) HandlePipe(conn *websocket.Conn, r *http.Request) {
+	session := r.Header.Get("Session")
+	if session == "" {
+		s.logger.Error("no session header")
+		conn.Close()
+		return
+	}
+	cmdSession := s.findSession(session)
+	if cmdSession == nil {
+		conn.Close()
+		s.logger.Error("command session not found")
+		return
+	}
+	lpath := r.URL.Path
+	pipeId := lpath[len("/ws/pipe/"):]
+	pipe, ok := s.pipes[pipeId]
+
+	if !ok {
+		conn.Close()
+		s.logger.Error("pipe not found")
+		cmdSession.Send(NewErrorResponse("pipe not found", nil))
+		return
+	}
+
+	if pipe.Src == session {
+		pipe.src = conn
+	} else if pipe.Dst == session {
+		pipe.dst = conn
+	} else {
+		cmdSession.Send(NewErrorResponse("not endpoint of current pipe", nil))
+		conn.Close()
+		return
+	}
+
+	if pipe.src != nil && pipe.dst != nil {
+		pipe.Start()
+		clientCmdSession := s.findSession(pipe.Src)
+		clientCmdSession.Send(NcmdConnectionReady(pipe.Id)) // info src endpoint ready and can setup proxy listener
+	}
+}
+
+func (s *Server) findSession(sessionId string) *Session {
+	clientSession, ok := s.clientSession[sessionId]
+	if ok {
+		return clientSession
+	}
+	agentSession, ok := s.agentSession[sessionId]
+	if ok {
+		return agentSession
+	}
+	return nil
 }

server/main.go

@@ -31,9 +31,12 @@ type ServerConfig struct {
 
 type Server struct {
 	*http.Server
-	mux    *http.ServeMux
-	Config *ServerConfig
-	logger *gologger.Logger
+	mux           *http.ServeMux
+	Config        *ServerConfig
+	logger        *gologger.Logger
+	clientSession map[string]*Session
+	agentSession  map[string]*Session
+	pipes         map[string]*Pipe
 }
 
 func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
@@ -60,10 +63,10 @@ func (s *Server) auth(r *http.Request) (*http.Request, bool) {
 	if err != nil {
 		return r, false
 	}
-	if strings.HasPrefix(lpath, "/ws/pipe") && authEntity.Token == "nil" {
-		return r, false
-	}
-	if !util.VerifyAuth(authEntity, s.Config.Key) {
+	// if strings.HasPrefix(lpath, "/ws/pipe") && authEntity.Token == "nil" {
+	// 	return r, false
+	// }
+	if !util.VerifyAuth(authEntity, s.Config.Salt) {
 		return r, false
 	}
 	//set auth entity to request context
@@ -134,9 +137,12 @@ func New(configFile string) *Server {
 	logger := gologger.GetLogger("server")
 	logger.Info("create server")
 	server := &Server{
-		Server: &http.Server{},
-		Config: config,
-		logger: logger,
+		Server:        &http.Server{},
+		Config:        config,
+		logger:        logger,
+		clientSession: make(map[string]*Session),
+		agentSession:  make(map[string]*Session),
+		pipes:         make(map[string]*Pipe),
 	}
 	return server
 }

server/session.go

@@ -2,6 +2,7 @@ package server
 
 import (
 	"context"
+	"encoding/json"
 
 	"git.pyer.club/kingecg/goemitter"
 	"git.pyer.club/kingecg/gotunnelserver/util"
@@ -39,7 +40,7 @@ func (s *Session) Start() {
 				return
 			}
 			if cmd.Type == util.NewConnection {
-				s.Emit("NewSession", cmd.Payload)
+				s.Emit("NewConnection", cmd.Payload)
 			}
 			select {
 			case <-s.ctx.Done():
@@ -63,3 +64,37 @@ func NewSession(conn *websocket.Conn) *Session {
 		EventEmitter: goemitter.NewEmitter(),
 	}
 }
+
+func NewCommand(t int, p map[string]string) *Command {
+	return &Command{
+		Type:    t,
+		Payload: p,
+	}
+}
+
+func NcmdSession(sessionId string) *Command {
+	return NewCommand(util.NewSession, map[string]string{"sessionId": sessionId})
+}
+
+func NewErrorResponse(err string, cmd *Command) *Command {
+	payload := map[string]string{
+		"error": err,
+		// "originalcmd": strconv.Itoa(cmd.Type),
+	}
+	if cmd != nil {
+
+		originalCmd, _ := json.Marshal(cmd)
+		payload["originalcmd"] = string(originalCmd)
+
+	}
+
+	return NewCommand(util.ErrorCmd, payload)
+}
+
+func NcmdConnectionInited(sessionId string) *Command {
+	return NewCommand(util.ConnectionReady, map[string]string{"sessionId": sessionId})
+}
+
+func NcmdConnectionReady(sessionId string) *Command {
+	return NewCommand(util.ConnectionReady, map[string]string{"sessionId": sessionId})
+}

util/const.go

@@ -3,5 +3,7 @@ package util
 const (
 	NewSession = iota
 	NewConnection
-	AgentReady
+	ConnectInited //used to disptatch new connection session id
+	ConnectionReady
+	ErrorCmd
 )

util/entity.go

@@ -12,7 +12,7 @@ import (
 
 type Entity struct {
 	Username string `json:"username"`
-	Token    string `json:"token"`
+	// Token    string `json:"token"`
 }
 
 type AuthEntity struct {
@@ -31,7 +31,7 @@ func VerifyAuth(a *AuthEntity, salt string) bool {
 }
 
 func GenAuthToken(a *AuthEntity, salt string) string {
-	str := fmt.Sprintf("%s:%s:%d:%s", a.Username, a.Token, a.Time, salt)
+	str := fmt.Sprintf("%s:%d:%s", a.Username, a.Time, salt)
 	h := md5.New()
 	h.Write([]byte(str))
 	return hex.EncodeToString(h.Sum(nil))