14
// If the ifindex is zero, interfaceMulticastAddrTable returns
15
// addresses for all network interfaces. Otherwise it returns
16
// addresses for a specific interface.
17
func interfaceMulticastAddrTable(ifindex int) ([]Addr, error) {
18
tab, err := syscall.RouteRIB(syscall.NET_RT_IFLIST2, ifindex)
12
// interfaceMulticastAddrTable returns addresses for a specific
14
func interfaceMulticastAddrTable(ifi *Interface) ([]Addr, error) {
15
tab, err := syscall.RouteRIB(syscall.NET_RT_IFLIST2, ifi.Index)
20
17
return nil, os.NewSyscallError("route rib", err)
23
19
msgs, err := syscall.ParseRoutingMessage(tab)
25
21
return nil, os.NewSyscallError("route message", err)
29
24
for _, m := range msgs {
30
switch v := m.(type) {
25
switch m := m.(type) {
31
26
case *syscall.InterfaceMulticastAddrMessage:
32
if ifindex == 0 || ifindex == int(v.Header.Index) {
33
ifma, err := newMulticastAddr(v)
27
if ifi.Index == int(m.Header.Index) {
28
ifma, err := newMulticastAddr(ifi, m)
44
func newMulticastAddr(m *syscall.InterfaceMulticastAddrMessage) ([]Addr, error) {
39
func newMulticastAddr(ifi *Interface, m *syscall.InterfaceMulticastAddrMessage) ([]Addr, error) {
45
40
sas, err := syscall.ParseRoutingSockaddr(m)
47
42
return nil, os.NewSyscallError("route sockaddr", err)
51
for _, s := range sas {
52
switch v := s.(type) {
45
for _, sa := range sas {
46
switch sa := sa.(type) {
53
47
case *syscall.SockaddrInet4:
54
ifma := &IPAddr{IP: IPv4(v.Addr[0], v.Addr[1], v.Addr[2], v.Addr[3])}
48
ifma := &IPAddr{IP: IPv4(sa.Addr[0], sa.Addr[1], sa.Addr[2], sa.Addr[3])}
55
49
ifmat = append(ifmat, ifma.toAddr())
56
50
case *syscall.SockaddrInet6:
57
51
ifma := &IPAddr{IP: make(IP, IPv6len)}
58
copy(ifma.IP, v.Addr[:])
59
// NOTE: KAME based IPv6 protcol stack usually embeds
52
copy(ifma.IP, sa.Addr[:])
53
// NOTE: KAME based IPv6 protocol stack usually embeds
60
54
// the interface index in the interface-local or link-
61
55
// local address as the kernel-internal form.
62
if ifma.IP.IsInterfaceLocalMulticast() ||
63
ifma.IP.IsLinkLocalMulticast() {
64
// remove embedded scope zone ID
56
if ifma.IP.IsInterfaceLocalMulticast() || ifma.IP.IsLinkLocalMulticast() {
65
57
ifma.IP[2], ifma.IP[3] = 0, 0
67
59
ifmat = append(ifmat, ifma.toAddr())