forked from snail007/goproxy
/
tunnel_bridge.go
244 lines (232 loc) · 6.87 KB
/
tunnel_bridge.go
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package services
import (
"bufio"
"log"
"net"
"proxy/utils"
"strconv"
"time"
)
type ServerConn struct {
//ClientLocalAddr string //tcp:2.2.22:333@ID
Conn *net.Conn
}
type TunnelBridge struct {
cfg TunnelBridgeArgs
serverConns utils.ConcurrentMap
clientControlConns utils.ConcurrentMap
// cmServer utils.ConnManager
// cmClient utils.ConnManager
}
func NewTunnelBridge() Service {
return &TunnelBridge{
cfg: TunnelBridgeArgs{},
serverConns: utils.NewConcurrentMap(),
clientControlConns: utils.NewConcurrentMap(),
// cmServer: utils.NewConnManager(),
// cmClient: utils.NewConnManager(),
}
}
func (s *TunnelBridge) InitService() {
}
func (s *TunnelBridge) CheckArgs() {
if *s.cfg.CertFile == "" || *s.cfg.KeyFile == "" {
log.Fatalf("cert and key file required")
}
s.cfg.CertBytes, s.cfg.KeyBytes = utils.TlsBytes(*s.cfg.CertFile, *s.cfg.KeyFile)
}
func (s *TunnelBridge) StopService() {
}
func (s *TunnelBridge) Start(args interface{}) (err error) {
s.cfg = args.(TunnelBridgeArgs)
s.CheckArgs()
s.InitService()
host, port, _ := net.SplitHostPort(*s.cfg.Local)
p, _ := strconv.Atoi(port)
sc := utils.NewServerChannel(host, p)
err = sc.ListenTls(s.cfg.CertBytes, s.cfg.KeyBytes, func(inConn net.Conn) {
//log.Printf("connection from %s ", inConn.RemoteAddr())
reader := bufio.NewReader(inConn)
var err error
var connType uint8
err = utils.ReadPacket(reader, &connType)
if err != nil {
log.Printf("read error,ERR:%s", err)
return
}
switch connType {
case CONN_SERVER:
var key, ID, clientLocalAddr, serverID string
err = utils.ReadPacketData(reader, &key, &ID, &clientLocalAddr, &serverID)
if err != nil {
log.Printf("read error,ERR:%s", err)
return
}
packet := utils.BuildPacketData(ID, clientLocalAddr, serverID)
log.Printf("server connection, key: %s , id: %s %s %s", key, ID, clientLocalAddr, serverID)
//addr := clientLocalAddr + "@" + ID
s.serverConns.Set(ID, ServerConn{
Conn: &inConn,
})
for {
item, ok := s.clientControlConns.Get(key)
if !ok {
log.Printf("client %s control conn not exists", key)
time.Sleep(time.Second * 3)
continue
}
(*item.(*net.Conn)).SetWriteDeadline(time.Now().Add(time.Second * 3))
_, err := (*item.(*net.Conn)).Write(packet)
(*item.(*net.Conn)).SetWriteDeadline(time.Time{})
if err != nil {
log.Printf("%s client control conn write signal fail, err: %s, retrying...", key, err)
time.Sleep(time.Second * 3)
continue
} else {
// s.cmServer.Add(serverID, ID, &inConn)
break
}
}
case CONN_CLIENT:
var key, ID, serverID string
err = utils.ReadPacketData(reader, &key, &ID, &serverID)
if err != nil {
log.Printf("read error,ERR:%s", err)
return
}
log.Printf("client connection , key: %s , id: %s, server id:%s", key, ID, serverID)
serverConnItem, ok := s.serverConns.Get(ID)
if !ok {
inConn.Close()
log.Printf("server conn %s exists", ID)
return
}
serverConn := serverConnItem.(ServerConn).Conn
utils.IoBind(*serverConn, inConn, func(err interface{}) {
s.serverConns.Remove(ID)
// s.cmClient.RemoveOne(key, ID)
// s.cmServer.RemoveOne(serverID, ID)
log.Printf("conn %s released", ID)
})
// s.cmClient.Add(key, ID, &inConn)
log.Printf("conn %s created", ID)
case CONN_CLIENT_CONTROL:
var key string
err = utils.ReadPacketData(reader, &key)
if err != nil {
log.Printf("read error,ERR:%s", err)
return
}
log.Printf("client control connection, key: %s", key)
if s.clientControlConns.Has(key) {
item, _ := s.clientControlConns.Get(key)
(*item.(*net.Conn)).Close()
}
s.clientControlConns.Set(key, &inConn)
log.Printf("set client %s control conn", key)
// case CONN_SERVER_HEARBEAT:
// var serverID string
// err = utils.ReadPacketData(reader, &serverID)
// if err != nil {
// log.Printf("read error,ERR:%s", err)
// return
// }
// log.Printf("server heartbeat connection, id: %s", serverID)
// writeDie := make(chan bool)
// readDie := make(chan bool)
// go func() {
// for {
// inConn.SetWriteDeadline(time.Now().Add(time.Second * 3))
// _, err = inConn.Write([]byte{0x00})
// inConn.SetWriteDeadline(time.Time{})
// if err != nil {
// log.Printf("server heartbeat connection write err %s", err)
// break
// }
// time.Sleep(time.Second * 3)
// }
// close(writeDie)
// }()
// go func() {
// for {
// signal := make([]byte, 1)
// inConn.SetReadDeadline(time.Now().Add(time.Second * 6))
// _, err := inConn.Read(signal)
// inConn.SetReadDeadline(time.Time{})
// if err != nil {
// log.Printf("server heartbeat connection read err: %s", err)
// break
// } else {
// // log.Printf("heartbeat from server ,id:%s", serverID)
// }
// }
// close(readDie)
// }()
// select {
// case <-readDie:
// case <-writeDie:
// }
// utils.CloseConn(&inConn)
// s.cmServer.Remove(serverID)
// log.Printf("server heartbeat conn %s released", serverID)
// case CONN_CLIENT_HEARBEAT:
// var clientID string
// err = utils.ReadPacketData(reader, &clientID)
// if err != nil {
// log.Printf("read error,ERR:%s", err)
// return
// }
// log.Printf("client heartbeat connection, id: %s", clientID)
// writeDie := make(chan bool)
// readDie := make(chan bool)
// go func() {
// for {
// inConn.SetWriteDeadline(time.Now().Add(time.Second * 3))
// _, err = inConn.Write([]byte{0x00})
// inConn.SetWriteDeadline(time.Time{})
// if err != nil {
// log.Printf("client heartbeat connection write err %s", err)
// break
// }
// time.Sleep(time.Second * 3)
// }
// close(writeDie)
// }()
// go func() {
// for {
// signal := make([]byte, 1)
// inConn.SetReadDeadline(time.Now().Add(time.Second * 6))
// _, err := inConn.Read(signal)
// inConn.SetReadDeadline(time.Time{})
// if err != nil {
// log.Printf("client control connection read err: %s", err)
// break
// } else {
// // log.Printf("heartbeat from client ,id:%s", clientID)
// }
// }
// close(readDie)
// }()
// select {
// case <-readDie:
// case <-writeDie:
// }
// utils.CloseConn(&inConn)
// s.cmClient.Remove(clientID)
// if s.clientControlConns.Has(clientID) {
// item, _ := s.clientControlConns.Get(clientID)
// (*item.(*net.Conn)).Close()
// }
// s.clientControlConns.Remove(clientID)
// log.Printf("client heartbeat conn %s released", clientID)
}
})
if err != nil {
return
}
log.Printf("proxy on tunnel bridge mode %s", (*sc.Listener).Addr())
return
}
func (s *TunnelBridge) Clean() {
s.StopService()
}