Debug ping

proxy/proxy.go

 
 		packet, err := src.Read()
 		if err != nil {
+			src.Logger().Warnw("Cannot read packet", "error", err)
 			return
 		}
 		if _, err = dst.Write(packet); err != nil {
+			src.Logger().Warnw("Cannot write packet", "error", err)
 			return
 		}
 	}
 }
 
-func (p *Proxy) directPipe(src io.ReadCloser, dst io.WriteCloser, wait *sync.WaitGroup) {
+func (p *Proxy) directPipe(src wrappers.StreamReadCloser, dst wrappers.StreamWriteCloser, wait *sync.WaitGroup) {
 	defer func() {
 		src.Close()
 		dst.Close()
 		wait.Done()
 	}()
 
-	io.Copy(dst, src)
+	if _, err := io.Copy(dst, src); err != nil {
+		src.Logger().Warnw("Cannot pump sockets", "error", err)
+	}
 }
 
 func NewProxy(conf *config.Config) *Proxy {

wrappers/mtproto_abridged.go

 		"counter", m.writeCounter,
 	)
 
-	if len(p)%4 == 0 {
+	if len(p)%4 != 0 {
 		return 0, errors.Errorf("Incorrect packet length %d", len(p))
 	}
 

wrappers/wrap.go

 }
 
 type StreamWriteCloser interface {
-	io.Closer
-	io.Writer
+	io.WriteCloser
 	Wrap
 }