diff options
| author | Tamir Duberstein <tamird@google.com> | 2019-02-28 14:37:42 -0800 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2019-02-28 14:38:32 -0800 |
| commit | 383078688353feb4ae3714aa4b1d79aea519f7a4 (patch) | |
| tree | dfef76346275ca81cad9289092e0bd9ae0e315e4 /pkg/tcpip/network/ipv6 | |
| parent | 05d721f9eec3ad0a430906b968a2876bf37c44a7 (diff) | |
Map IPv{4,6} addresses to ethernet addresses
...in accordance with RFCs 1112 and 2464.
Fixes IPv4 multicast when IP_MULTICAST_IF is specified.
Don't return ErrNoRoute when no route is needed.
Don't set Route.NextHop when no route is needed.
PiperOrigin-RevId: 236199813
Change-Id: I48ed33e1b7f760deaa37e18ad7f1b8b62819ab43
Diffstat (limited to 'pkg/tcpip/network/ipv6')
| -rw-r--r-- | pkg/tcpip/network/ipv6/icmp.go | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/pkg/tcpip/network/ipv6/icmp.go b/pkg/tcpip/network/ipv6/icmp.go index 5a3c17768..e43253d3e 100644 --- a/pkg/tcpip/network/ipv6/icmp.go +++ b/pkg/tcpip/network/ipv6/icmp.go @@ -206,6 +206,25 @@ func (*protocol) LinkAddressRequest(addr, localAddr tcpip.Address, linkEP stack. // ResolveStaticAddress implements stack.LinkAddressResolver. func (*protocol) ResolveStaticAddress(addr tcpip.Address) (tcpip.LinkAddress, bool) { + if header.IsV6MulticastAddress(addr) { + // RFC 2464 Transmission of IPv6 Packets over Ethernet Networks + // + // 7. Address Mapping -- Multicast + // + // An IPv6 packet with a multicast destination address DST, + // consisting of the sixteen octets DST[1] through DST[16], is + // transmitted to the Ethernet multicast address whose first + // two octets are the value 3333 hexadecimal and whose last + // four octets are the last four octets of DST. + return tcpip.LinkAddress([]byte{ + 0x33, + 0x33, + addr[header.IPv6AddressSize-4], + addr[header.IPv6AddressSize-3], + addr[header.IPv6AddressSize-2], + addr[header.IPv6AddressSize-1], + }), true + } return "", false } |