func handleQueryV2(conn *net.UDPConn, addr *net.UDPAddr, buf []byte) { var pkt discover.QueryV2 err := pkt.UnmarshalXDR(buf) if err != nil { log.Println("QueryV2 Unmarshal:", err) log.Println(hex.Dump(buf)) return } if debug { log.Printf("<- %v %#v", addr, pkt) } lock.Lock() node, ok := nodes[pkt.NodeID] queries++ lock.Unlock() if ok && len(node.Addresses) > 0 { pkt := discover.AnnounceV2{ Magic: discover.AnnouncementMagicV2, NodeID: pkt.NodeID, } for _, addr := range node.Addresses { pkt.Addresses = append(pkt.Addresses, discover.Address{IP: addr.IP, Port: addr.Port}) } if debug { log.Printf("-> %v %#v", addr, pkt) } tb := pkt.MarshalXDR() _, _, err = conn.WriteMsgUDP(tb, nil, addr) if err != nil { log.Println("QueryV2 response write:", err) } lock.Lock() answered++ lock.Unlock() } }