func parseVersion(r io.Reader) (versionMessage, error) {
v := &binaryVersionMessage{}
check(binary.Read(r, binary.BigEndian, v))
fmt.Println("version", v.Version)
fmt.Println("addr recv", parseIP(v.AddrRecv.IP))
userAgent, _, _ := encVarstring.ReadVarString(r)
streams := readVarIntList(r)
version := versionMessage{*v, userAgent, streams}
return version, nil
}
func (this *DataReader) ReadVarString() (string, error) {
value, i, err := varstring.ReadVarString(this.r)
this.count += int64(i)
return value, err
}