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.")
}
}
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
}
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
}
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
}
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
}
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("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^")
}
// 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
}
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()
}
}
}
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
}
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
}
// 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
}
func isLinkLocalUnicast(ip net.IP) bool {
return ip.To4() == nil && ip.To16() != nil && ip.IsLinkLocalUnicast()
}
func isUnicast(ip net.IP) bool {
return ip.To4() != nil && (ip.IsLoopback() || ip.IsLinkLocalUnicast() || ip.IsGlobalUnicast())
}