Commit 1aff6471 authored Aug 28, 2017 by Florian Westphal Committed by Pablo Neira Ayuso Aug 28, 2017

netfilter: rt: account for tcp header size too



This needs to accout for the ipv4/ipv6 header size and the tcp
header without options.

Fixes: 6b5dc98e ("netfilter: rt: add support to fetch path mss")
Reported-by: Matteo Croce <technoboy85@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

parent d11dd6cd

net/netfilter/nft_rt.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -35,10 +35,11 @@ static u16 get_tcpmss(const struct nft_pktinfo pkt, const struct dst_entry skb
		switch (nft_pf(pkt)) {
		case NFPROTO_IPV4:
		fl.u.ip4.daddr = ip_hdr(skb)->saddr;
		minlen = sizeof(struct iphdr);
		minlen = sizeof(struct iphdr) + sizeof(struct tcphdr);
		break;
		case NFPROTO_IPV6:
		fl.u.ip6.daddr = ipv6_hdr(skb)->saddr;
		minlen = sizeof(struct ipv6hdr) + sizeof(struct tcphdr);
		break;
		}