flow_dissector: Support IPv6 fragment header (b840f28b) · Commits · 戴 / test

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:

net/core/flow_dissector.c

+25 −0

Original line number	Diff line number	Diff line
		@@ -409,6 +409,31 @@ ip_proto_again:

		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;