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Commit b840f28b authored by Tom Herbert's avatar Tom Herbert Committed by David S. Miller
Browse files

flow_dissector: Support IPv6 fragment header 



Parse NEXTHDR_FRAGMENT. When seen account for it in the fragment bits of
key_control. Also, check if first fragment should be parsed.

Signed-off-by: default avatarTom Herbert <tom@herbertland.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 807e165d

net/core/flow_dissector.c

+25 −0
Original line number Diff line number Diff line
@@ -409,6 +409,31 @@ bool __skb_flow_dissect(const struct sk_buff *skb, 


		goto ip_proto_again;

	}

	case NEXTHDR_FRAGMENT: {

		struct frag_hdr _fh, *fh;



		if (proto != htons(ETH_P_IPV6))

			break;



		fh = __skb_header_pointer(skb, nhoff, sizeof(_fh),

					  data, hlen, &_fh);



		if (!fh)

			goto out_bad;



		key_control->is_fragment = 1;



		nhoff += sizeof(_fh);



		if (!(fh->frag_off & htons(IP6_OFFSET))) {

			key_control->first_frag = 1;

			if (flags & FLOW_DISSECTOR_F_PARSE_1ST_FRAG) {

				ip_proto = fh->nexthdr;

				goto ip_proto_again;

			}

		}

		goto out_good;

	}

	case IPPROTO_IPIP:

		proto = htons(ETH_P_IP);

		goto ip;