A bug found in packet.go

[JMVoid]

A bug was found in udp relay function.
in packet.go, line 83
return len(b), addr, err
the return variable of reading byte length should be len(bb) but not len(b). the b is input variable length come from buf (buf := make([]byte, udpBufSize)). so the return reading byte length always 65536.

[TongxiJi]

yes, a biiiiiiiiig bug.

[lixin9311]

Thank you for pointing it out
Fixed in #109