wgengine/filter: add full IPv6 support.

Part of #19. Signed-off-by: David Anderson <danderson@tailscale.com>
2020-11-10 23:23:17 -08:00
parent fac2b30eff
commit 04ff3c91ee
9 changed files with 963 additions and 490 deletions
--- a/net/packet/packet.go
+++ b/net/packet/packet.go
@ -186,6 +186,10 @@ func (q *Parsed) decode4(b []byte) {
 			q.DstPort = 0
 			q.dataofs = q.subofs + icmp4HeaderLength
 			return
+		case IGMP:
+			// Keep IPProto, but don't parse anything else
+			// out.
+			return
 		case TCP:
 			if len(sub) < tcpHeaderLength {
 				q.IPProto = Unknown