Example #1
0
func getPublicIPv6(addresses []net.Addr) (net.IP, error) {
	var candidates []net.IP

	// Find public IPv6 address
	for _, rawAddr := range addresses {
		var ip net.IP
		switch addr := rawAddr.(type) {
		case *net.IPAddr:
			ip = addr.IP
		case *net.IPNet:
			ip = addr.IP
		default:
			continue
		}

		if ip.To4() != nil {
			continue
		}

		if ip.IsLinkLocalUnicast() || isUniqueLocalAddress(ip) || ip.IsLoopback() {
			continue
		}
		candidates = append(candidates, ip)
	}
	numIps := len(candidates)
	switch numIps {
	case 0:
		return nil, fmt.Errorf("No public IPv6 address found")
	case 1:
		return candidates[0], nil
	default:
		return nil, fmt.Errorf("Multiple public IPv6 addresses found. Please configure one.")
	}
}
Example #2
0
File: net.go Project: neviim/scope
func validateRemoteAddr(ip net.IP) bool {
	if ip == nil {
		return false
	}
	if ip.IsInterfaceLocalMulticast() {
		return false
	}
	if ip.IsLinkLocalMulticast() {
		return false
	}
	if ip.IsLinkLocalUnicast() {
		return false
	}
	if ip.IsLoopback() {
		return false
	}
	if ip.IsMulticast() {
		return false
	}
	if ip.IsUnspecified() {
		return false
	}
	if isBroadcasty(ip) {
		return false
	}

	return true
}
Example #3
0
func routableIP(network string, ip net.IP) net.IP {
	if !ip.IsLoopback() && !ip.IsLinkLocalUnicast() && !ip.IsGlobalUnicast() {
		return nil
	}
	switch network {
	case "ip4":
		if ip := ip.To4(); ip != nil {
			return ip
		}
	case "ip6":
		if ip.IsLoopback() { // addressing scope of the loopback address depends on each implementation
			return nil
		}
		if ip := ip.To16(); ip != nil && ip.To4() == nil {
			return ip
		}
	default:
		if ip := ip.To4(); ip != nil {
			return ip
		}
		if ip := ip.To16(); ip != nil {
			return ip
		}
	}
	return nil
}
Example #4
0
func InterfaceIPs() ([]*net.IPAddr, error) {
	var (
		addrs []*net.IPAddr
	)

	ifaces, err := net.Interfaces()
	if err != nil {
		return nil, err
	}
	for _, iface := range ifaces {
		iaddrs, err := iface.Addrs()
		if err != nil {
			return nil, err
		}

		for _, iaddr := range iaddrs {
			var (
				ip   net.IP
				zone string
			)

			switch x := iaddr.(type) {
			case *net.IPAddr:
				ip = x.IP
				zone = x.Zone
			case *net.IPNet:
				ip = x.IP
				zone = ""
			}

			if ip.IsMulticast() ||
				ip.IsUnspecified() ||
				ip.IsInterfaceLocalMulticast() ||
				ip.IsLinkLocalMulticast() ||
				ip.IsLinkLocalUnicast() {
				continue
			}

			if ipv4 := ip.To4(); ipv4 != nil {
				ip = ipv4
			}

			addrs = append(addrs, &net.IPAddr{
				IP:   ip,
				Zone: zone,
			})
		}
	}

	return addrs, nil
}
Example #5
0
func isLoopbackIP(ip net.IP) bool {

	// ignore loopback ips
	if ip.IsLoopback() {
		return true
	}

	// ignore local ips
	if ip.IsLinkLocalUnicast() || ip.IsLinkLocalMulticast() {
		return true
	}

	return false
}
Example #6
0
func printStartup(port uint16) {
	log.Print("")
	log.Printf("CRG Scoreboard and Game System Version %v", version)
	log.Print("")
	log.Print("vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv")
	log.Print("vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv")
	log.Print("Double-click/open the 'start.html' file, or")
	log.Print("Open a web browser (either Google Chrome or Mozilla Firefox recommended) to:")
	log.Printf("http://localhost:%d/", port)
	log.Print("or try one of these URLs:")
	ifaces, err := net.Interfaces()
	if err != nil {
		log.Print("Cannot get interfaces:", err)
	} else {
		for _, i := range ifaces {
			addrs, err := i.Addrs()
			if err != nil {
				log.Printf("Cannot get addresses on %v: %v", i, err)
			} else {
				for _, addr := range addrs {
					var ip net.IP
					switch v := addr.(type) {
					case *net.IPNet:
						ip = v.IP
					case *net.IPAddr:
						ip = v.IP
					}

					if ip.IsLoopback() || ip.IsLinkLocalUnicast() {
						continue
					}
					var url string
					if ip.To4() != nil {
						url = fmt.Sprintf("http://%v:%d/", ip, port)
					} else {
						url = fmt.Sprintf("http://[%v]:%d/", ip, port)
					}
					urls = append(urls, url)
					log.Print(url)
				}
			}
		}
	}
	log.Print("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^")
	log.Print("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^")
}
Example #7
0
// Per http://www.libtorrent.org/dht_sec.html#enforcement, the IP is
// considered a local network address and should be exempted from node ID
// verification.
func isLocalNetwork(ip net.IP) bool {
	if classA.Contains(ip) {
		return true
	}
	if classB.Contains(ip) {
		return true
	}
	if classC.Contains(ip) {
		return true
	}
	if ip.IsLinkLocalUnicast() {
		return true
	}
	if ip.IsLoopback() {
		return true
	}
	return false
}
Example #8
0
func (b *Bridge) updateIP(mac string, ip net.IP) {
	if ip == nil || ip.IsLinkLocalUnicast() {
		return
	}

	log.Debug("got mac/ip pair:", mac, ip)

	bridgeLock.Lock()
	defer bridgeLock.Unlock()

	for _, tap := range b.taps {
		if tap.Defunct || tap.MAC != mac {
			continue
		}

		if ip := ip.To4(); ip != nil {
			tap.IP4 = ip.String()
		} else {
			tap.IP6 = ip.String()
		}
	}
}
Example #9
0
func routableIP(network string, ip net.IP) net.IP {
	if !ip.IsLoopback() && !ip.IsLinkLocalUnicast() && !ip.IsGlobalUnicast() {
		return nil
	}
	switch network {
	case "ip4":
		if ip := ip.To4(); ip != nil {
			return ip
		}
	case "ip6":
		if ip := ip.To16(); ip != nil && ip.To4() == nil {
			return ip
		}
	default:
		if ip := ip.To4(); ip != nil {
			return ip
		}
		if ip := ip.To16(); ip != nil {
			return ip
		}
	}
	return nil
}
Example #10
0
func chooseHostInterfaceNativeGo() (net.IP, error) {
	intfs, err := net.Interfaces()
	if err != nil {
		return nil, err
	}
	i := 0
	var ip net.IP
	for i = range intfs {
		if flagsSet(intfs[i].Flags, net.FlagUp) && flagsClear(intfs[i].Flags, net.FlagLoopback|net.FlagPointToPoint) {
			addrs, err := intfs[i].Addrs()
			if err != nil {
				return nil, err
			}
			if len(addrs) > 0 {
				for _, addr := range addrs {
					if addrIP, _, err := net.ParseCIDR(addr.String()); err == nil {
						if addrIP.To4() != nil {
							ip = addrIP.To4()
							if !ip.IsLinkLocalMulticast() && !ip.IsLinkLocalUnicast() {
								break
							}
						}
					}
				}
				if ip != nil {
					// This interface should suffice.
					break
				}
			}
		}
	}
	if ip == nil {
		return nil, fmt.Errorf("no acceptable interface from host")
	}
	glog.V(4).Infof("Choosing interface %s (IP %v) as default", intfs[i].Name, ip)
	return ip, nil
}
Example #11
0
// setupAgent is used to create the agent we use
func (a *AgentCommand) setupSerf(config *Config) *serf.Serf {
	bindIP, bindPort, err := config.AddrParts(config.BindAddr)
	if err != nil {
		a.Ui.Error(fmt.Sprintf("Invalid bind address: %s", err))
		return nil
	}

	// Check if we have an interface
	if iface, _ := config.NetworkInterface(); iface != nil {
		addrs, err := iface.Addrs()
		if err != nil {
			a.Ui.Error(fmt.Sprintf("Failed to get interface addresses: %s", err))
			return nil
		}
		if len(addrs) == 0 {
			a.Ui.Error(fmt.Sprintf("Interface '%s' has no addresses", config.Interface))
			return nil
		}

		// If there is no bind IP, pick an address
		if bindIP == "0.0.0.0" {
			found := false
			for _, ad := range addrs {
				var addrIP net.IP
				if runtime.GOOS == "windows" {
					// Waiting for https://github.com/golang/go/issues/5395 to use IPNet only
					addr, ok := ad.(*net.IPAddr)
					if !ok {
						continue
					}
					addrIP = addr.IP
				} else {
					addr, ok := ad.(*net.IPNet)
					if !ok {
						continue
					}
					addrIP = addr.IP
				}

				// Skip self-assigned IPs
				if addrIP.IsLinkLocalUnicast() {
					continue
				}

				// Found an IP
				found = true
				bindIP = addrIP.String()
				a.Ui.Output(fmt.Sprintf("Using interface '%s' address '%s'",
					config.Interface, bindIP))

				// Update the configuration
				bindAddr := &net.TCPAddr{
					IP:   net.ParseIP(bindIP),
					Port: bindPort,
				}
				config.BindAddr = bindAddr.String()
				break
			}
			if !found {
				a.Ui.Error(fmt.Sprintf("Failed to find usable address for interface '%s'", config.Interface))
				return nil
			}

		} else {
			// If there is a bind IP, ensure it is available
			found := false
			for _, a := range addrs {
				addr, ok := a.(*net.IPNet)
				if !ok {
					continue
				}
				if addr.IP.String() == bindIP {
					found = true
					break
				}
			}
			if !found {
				a.Ui.Error(fmt.Sprintf("Interface '%s' has no '%s' address",
					config.Interface, bindIP))
				return nil
			}
		}
	}

	var advertiseIP string
	var advertisePort int
	if config.AdvertiseAddr != "" {
		advertiseIP, advertisePort, err = config.AddrParts(config.AdvertiseAddr)
		if err != nil {
			a.Ui.Error(fmt.Sprintf("Invalid advertise address: %s", err))
			return nil
		}
	}

	encryptKey, err := config.EncryptBytes()
	if err != nil {
		a.Ui.Error(fmt.Sprintf("Invalid encryption key: %s", err))
		return nil
	}

	serfConfig := serf.DefaultConfig()
	switch config.Profile {
	case "lan":
		serfConfig.MemberlistConfig = memberlist.DefaultLANConfig()
	case "wan":
		serfConfig.MemberlistConfig = memberlist.DefaultWANConfig()
	case "local":
		serfConfig.MemberlistConfig = memberlist.DefaultLocalConfig()
	default:
		a.Ui.Error(fmt.Sprintf("Unknown profile: %s", config.Profile))
		return nil
	}

	serfConfig.MemberlistConfig.BindAddr = bindIP
	serfConfig.MemberlistConfig.BindPort = bindPort
	serfConfig.MemberlistConfig.AdvertiseAddr = advertiseIP
	serfConfig.MemberlistConfig.AdvertisePort = advertisePort
	serfConfig.MemberlistConfig.SecretKey = encryptKey
	serfConfig.NodeName = config.NodeName
	serfConfig.Tags = config.Tags
	serfConfig.SnapshotPath = config.SnapshotPath
	serfConfig.CoalescePeriod = 3 * time.Second
	serfConfig.QuiescentPeriod = time.Second
	serfConfig.UserCoalescePeriod = 3 * time.Second
	serfConfig.UserQuiescentPeriod = time.Second
	if config.ReconnectInterval != 0 {
		serfConfig.ReconnectInterval = config.ReconnectInterval
	}
	if config.ReconnectTimeout != 0 {
		serfConfig.ReconnectTimeout = config.ReconnectTimeout
	}
	if config.TombstoneTimeout != 0 {
		serfConfig.TombstoneTimeout = config.TombstoneTimeout
	}
	serfConfig.EnableNameConflictResolution = !config.DisableNameResolution
	if config.KeyringFile != "" {
		serfConfig.KeyringFile = config.KeyringFile
	}
	serfConfig.RejoinAfterLeave = config.RejoinAfterLeave

	// Create a channel to listen for events from Serf
	a.eventCh = make(chan serf.Event, 64)
	serfConfig.EventCh = a.eventCh

	// Start Serf
	a.Ui.Output("Starting Serf agent...")
	log.Info("agent: Serf agent starting")

	serfConfig.LogOutput = ioutil.Discard
	serfConfig.MemberlistConfig.LogOutput = ioutil.Discard

	// Create serf first
	serf, err := serf.Create(serfConfig)
	if err != nil {
		a.Ui.Error(err.Error())
		log.Error(err)
		return nil
	}

	return serf
}
Example #12
0
func isLinkLocalUnicast(ip net.IP) bool {
	return ip.To4() == nil && ip.To16() != nil && ip.IsLinkLocalUnicast()
}
Example #13
0
func isUnicast(ip net.IP) bool {
	return ip.To4() != nil && (ip.IsLoopback() || ip.IsLinkLocalUnicast() || ip.IsGlobalUnicast())
}