fix(recv): panic on short data len

gold/link/listen.go

@@ -130,6 +130,12 @@ func (m *Me) listen() (conn p2p.Conn, err error) {
 				}
 				continue
 			}
+			if n <= 0 {
+				if config.ShowDebugLog {
+					logrus.Debugln("[listen] unexpected read n =", n)
+				}
+				continue
+			}
 			lq := lstnq{
 				index: -1,
 				addr:  addr,

gold/link/recv.go

@@ -32,8 +32,19 @@ func (m *Me) wait(data []byte) *head.Packet {
 	}
 	if m.base14 {
 		data = base14.Decode(data)
+		if len(data) < bound {
+			bound = len(data)
+			endl = "."
+		}
+		if config.ShowDebugLog {
+			logrus.Debugln("[recv] data b14ed", hex.EncodeToString(data[:bound]), endl)
+		}
 	}
 	seq, data := m.xordec(data)
+	if len(data) < bound {
+		bound = len(data)
+		endl = "."
+	}
 	if config.ShowDebugLog {
 		logrus.Debugln("[recv] data xored", hex.EncodeToString(data[:bound]), endl)
 	}