func()

in server.go [219:246]

• 25 lines of code
• 6 McCabe index (conditional complexity)

func (s *server) listenUDP() error {
	var (
		err         error
		localAddr   *net.UDPAddr
		pktListener *net.UDPConn
	)

	if len(s.addr) == 0 || !strings.Contains(s.addr, ":") {
		pktListener, err = gxnet.ListenOnUDPRandomPort(s.addr)
		if err != nil {
			return perrors.Wrapf(err, "gxnet.ListenOnUDPRandomPort(addr:%s)", s.addr)
		}
	} else {
		localAddr, err = net.ResolveUDPAddr("udp", s.addr)
		if err != nil {
			return perrors.Wrapf(err, "net.ResolveUDPAddr(udp, addr:%s)", s.addr)
		}
		pktListener, err = net.ListenUDP("udp", localAddr)
		if err != nil {
			return perrors.Wrapf(err, "net.ListenUDP((udp, localAddr:%#v)", localAddr)
		}
	}

	s.pktListener = pktListener
	s.addr = s.pktListener.LocalAddr().String()

	return nil
}