func (n *krNodesIPv6) UnmarshalBencode(b []byte) error {
var bb []byte
err := bencode.DecodeBytes(b, &bb)
if err != nil {
return err
}
if len(bb)%38 != 0 {
return fmt.Errorf("not divisible by 38")
}
*n = nil
for len(bb) > 0 {
nodeID := NodeID(bb[0:20])
ip := net.IP(bb[20:36])
port := binary.BigEndian.Uint16(bb[36:38])
*n = append(*n, NodeLocator{
NodeID: nodeID,
Addr: net.UDPAddr{
IP: ip,
Port: int(port),
},
})
bb = bb[38:]
}
return nil
}
func decodeByType(b bencode.RawMessage, valueType reflect.Type) (interface{}, error) {
if valueType != nil {
v := reflect.New(valueType).Interface()
err := bencode.DecodeBytes([]byte(b), v)
if err != nil {
return nil, err
}
return v, nil
}
var generic interface{}
err := bencode.DecodeBytes([]byte(b), &generic)
if err != nil {
return nil, err
}
return generic, nil
}
func Decode(b []byte) (msg *Message, err error) {
err = bencode.DecodeBytes(b, &msg)
if err != nil {
log.Debugf("decode error: %x", b)
return
}
if msg.Type == "q" {
msg.Args, err = decodeByType(msg.Args_, queryTypes[msg.Method])
}
// msg.Type == "r": Must decode later using ResponseAsMethod.
return
}
func (n *Endpoint) UnmarshalBencode(b []byte) error {
var bb []byte
err := bencode.DecodeBytes(b, &bb)
if err != nil {
return err
}
if len(bb) != 6 && len(bb) != 18 {
return fmt.Errorf("endpoint not 6 or 18 bytes in length")
}
ip := net.IP(bb[0 : len(bb)-2])
port := binary.BigEndian.Uint16(bb[len(bb)-2:])
*n = Endpoint{
IP: ip,
Port: int(port),
}
return nil
}
