func (d *Discoverer) startLocalIPv6Multicasts(localMCAddr string) { intfs, err := net.Interfaces() if err != nil { if debug { l.Debugln("discover: interfaces:", err) } l.Infoln("Local discovery over IPv6 unavailable") return } v6Intfs := 0 for _, intf := range intfs { // Interface flags seem to always be 0 on Windows if runtime.GOOS != "windows" && (intf.Flags&net.FlagUp == 0 || intf.Flags&net.FlagMulticast == 0) { continue } mb, err := beacon.NewMulticast(localMCAddr, intf.Name) if err != nil { if debug { l.Debugln("discover: Start local v6:", err) } continue } d.beacons = append(d.beacons, mb) go d.recvAnnouncements(mb) v6Intfs++ } if v6Intfs == 0 { l.Infoln("Local discovery over IPv6 unavailable") } }
func (d *Discoverer) StartLocal(localPort int, localMCAddr string) { if localPort > 0 { bb, err := beacon.NewBroadcast(localPort) if err != nil { if debug { l.Debugln(err) } l.Infoln("Local discovery over IPv4 unavailable") } else { d.broadcastBeacon = bb go d.recvAnnouncements(bb) } } if len(localMCAddr) > 0 { mb, err := beacon.NewMulticast(localMCAddr) if err != nil { if debug { l.Debugln(err) } l.Infoln("Local discovery over IPv6 unavailable") } else { d.multicastBeacon = mb go d.recvAnnouncements(mb) } } if d.broadcastBeacon == nil && d.multicastBeacon == nil { l.Warnln("Local discovery unavailable") } else { d.localBcastTick = time.Tick(d.localBcastIntv) d.forcedBcastTick = make(chan time.Time) go d.sendLocalAnnouncements() } }