func performConnect(backend string, frontconn io.ReadWriter) {
log.Printf("trying to connect to %s...\n", backend)
backconn, err := net.Dial("tcp", backend)
if err != nil {
log.Printf("failed to connect to %s: %s\n", backend, err)
frontconn.Write(errorReplyConnect(0x05))
return
}
backaddr := backconn.RemoteAddr().String()
log.Println("CONNECTED backend", backconn, backaddr)
defer func() {
backconn.Close()
log.Println("DISCONNECTED backend", backconn, backaddr)
}()
// reply to the CONNECT command
buf := make([]byte, 10)
copy(buf, []byte{0x05, 0x00, 0x00, 0x01})
packNetAddr(backconn.RemoteAddr(), buf[4:])
frontconn.Write(buf)
// bridge connection
shutdown := make(chan bool, 2)
go common.IOBridge(frontconn, backconn, shutdown)
go common.IOBridge(backconn, frontconn, shutdown)
<-shutdown
}
func performConnect(frontconn, backconn io.ReadWriter) {
shutdown := make(chan bool, 2)
go common.IOBridge(frontconn, backconn, shutdown)
go common.IOBridge(backconn, frontconn, shutdown)
// wait for either side to close
<-shutdown
}