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https://github.com/luxfi/kms.git
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zeekay
cc986c328d
Squashes all pre-rewrite history into a single root commit. Previous tree: - 14506 commits including upstream Infisical fork history - Multiple merge chains carrying pre-purge content Force-rewrite per disk-space reclamation discipline. GHCR images (1.9.9, 1.9.11) remain immutable; their git lineage is no longer materialized.
116 lines
2.7 KiB
Go
116 lines
2.7 KiB
Go
package zeroconf
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import (
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"fmt"
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"net"
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"golang.org/x/net/ipv4"
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"golang.org/x/net/ipv6"
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)
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var (
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// Multicast groups used by mDNS
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mdnsGroupIPv4 = net.IPv4(224, 0, 0, 251)
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mdnsGroupIPv6 = net.ParseIP("ff02::fb")
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// mDNS wildcard addresses
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mdnsWildcardAddrIPv4 = &net.UDPAddr{
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IP: net.ParseIP("224.0.0.0"),
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Port: 5353,
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}
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mdnsWildcardAddrIPv6 = &net.UDPAddr{
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IP: net.ParseIP("ff02::"),
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// IP: net.ParseIP("fd00::12d3:26e7:48db:e7d"),
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Port: 5353,
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}
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// mDNS endpoint addresses
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ipv4Addr = &net.UDPAddr{
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IP: mdnsGroupIPv4,
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Port: 5353,
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}
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ipv6Addr = &net.UDPAddr{
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IP: mdnsGroupIPv6,
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Port: 5353,
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}
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)
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func joinUdp6Multicast(interfaces []net.Interface) (*ipv6.PacketConn, error) {
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udpConn, err := net.ListenUDP("udp6", mdnsWildcardAddrIPv6)
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if err != nil {
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return nil, err
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}
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// Join multicast groups to receive announcements
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pkConn := ipv6.NewPacketConn(udpConn)
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pkConn.SetControlMessage(ipv6.FlagInterface, true)
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if len(interfaces) == 0 {
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interfaces = listMulticastInterfaces()
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}
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// log.Println("Using multicast interfaces: ", interfaces)
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var failedJoins int
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for _, iface := range interfaces {
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if err := pkConn.JoinGroup(&iface, &net.UDPAddr{IP: mdnsGroupIPv6}); err != nil {
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// log.Println("Udp6 JoinGroup failed for iface ", iface)
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failedJoins++
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}
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}
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if failedJoins == len(interfaces) {
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pkConn.Close()
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return nil, fmt.Errorf("udp6: failed to join any of these interfaces: %v", interfaces)
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}
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return pkConn, nil
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}
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func joinUdp4Multicast(interfaces []net.Interface) (*ipv4.PacketConn, error) {
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udpConn, err := net.ListenUDP("udp4", mdnsWildcardAddrIPv4)
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if err != nil {
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// log.Printf("[ERR] bonjour: Failed to bind to udp4 mutlicast: %v", err)
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return nil, err
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}
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// Join multicast groups to receive announcements
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pkConn := ipv4.NewPacketConn(udpConn)
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pkConn.SetControlMessage(ipv4.FlagInterface, true)
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if len(interfaces) == 0 {
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interfaces = listMulticastInterfaces()
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}
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// log.Println("Using multicast interfaces: ", interfaces)
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var failedJoins int
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for _, iface := range interfaces {
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if err := pkConn.JoinGroup(&iface, &net.UDPAddr{IP: mdnsGroupIPv4}); err != nil {
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// log.Println("Udp4 JoinGroup failed for iface ", iface)
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failedJoins++
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}
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}
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if failedJoins == len(interfaces) {
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pkConn.Close()
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return nil, fmt.Errorf("udp4: failed to join any of these interfaces: %v", interfaces)
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}
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return pkConn, nil
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}
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func listMulticastInterfaces() []net.Interface {
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var interfaces []net.Interface
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ifaces, err := net.Interfaces()
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if err != nil {
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return nil
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}
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for _, ifi := range ifaces {
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if (ifi.Flags & net.FlagUp) == 0 {
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continue
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}
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if (ifi.Flags & net.FlagMulticast) > 0 {
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interfaces = append(interfaces, ifi)
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}
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}
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return interfaces
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}
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