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 connections, (l[%s] r[%s]) (l[%s] r[%s])", localConn.GetLocalAddr(), localConn.GetRemoteAddr(),
remoteConn.GetLocalAddr(), remoteConn.GetRemoteAddr())
if p.UseEncryption {
go conn.JoinMore(localConn, remoteConn, p.AuthToken)
} else {
go conn.Join(localConn, remoteConn)
}
return nil
}
// start listening for user conns
func (p *ProxyServer) Start(c *conn.Conn) (err error) {
p.CtlConn = c
p.Init()
if p.Type == "tcp" {
l, err := conn.Listen(p.BindAddr, p.ListenPort)
if err != nil {
return err
}
p.listeners = append(p.listeners, l)
} else if p.Type == "http" {
for _, domain := range p.CustomDomains {
l, err := VhostMuxer.Listen(domain)
if err != nil {
return err
}
p.listeners = append(p.listeners, l)
}
}
p.Lock()
p.Status = consts.Working
p.Unlock()
// start a goroutine for every listener to accept user connection
for _, listener := range p.listeners {
go func(l Listener) {
for {
// block
// if listener is closed, err returned
c, err := l.Accept()
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())
if p.Status != consts.Working {
log.Debug("ProxyName [%s] is not working, new user conn close", p.Name)
c.Close()
return
}
// start another goroutine for join two conns from frpc and user
go func() {
workConn, err := p.getWorkConn()
if err != nil {
return
}
userConn := c
// msg will transfer to another without modifying
// l means local, r means remote
log.Debug("Join two connections, (l[%s] r[%s]) (l[%s] r[%s])", workConn.GetLocalAddr(), workConn.GetRemoteAddr(),
userConn.GetLocalAddr(), userConn.GetRemoteAddr())
if p.UseEncryption {
go conn.JoinMore(userConn, workConn, p.AuthToken)
} else {
go conn.Join(userConn, workConn)
}
}()
}
}(listener)
}
return nil
}