From fb0f8e678cd490eaacde5f8077d54089fc4388f6 Mon Sep 17 00:00:00 2001 From: Sven Auhagen Date: Wed, 27 Apr 2022 09:15:15 +0200 Subject: [PATCH] netfilter: flowtable: nft_flow_route use more data for reverse route When creating a flow table entry, the reverse route is looked up based on the current packet. There can be scenarios where the user creates a custom ip rule to route the traffic differently. In order to support those scenarios, the lookup needs to add more information based on the current packet. The patch adds multiple new information to the route lookup. Signed-off-by: Sven Auhagen Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nft_flow_offload.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/netfilter/nft_flow_offload.c b/net/netfilter/nft_flow_offload.c index 900d48c810a12..50991ab1e2d29 100644 --- a/net/netfilter/nft_flow_offload.c +++ b/net/netfilter/nft_flow_offload.c @@ -227,11 +227,19 @@ static int nft_flow_route(const struct nft_pktinfo *pkt, switch (nft_pf(pkt)) { case NFPROTO_IPV4: fl.u.ip4.daddr = ct->tuplehash[dir].tuple.src.u3.ip; + fl.u.ip4.saddr = ct->tuplehash[dir].tuple.dst.u3.ip; fl.u.ip4.flowi4_oif = nft_in(pkt)->ifindex; + fl.u.ip4.flowi4_iif = this_dst->dev->ifindex; + fl.u.ip4.flowi4_tos = RT_TOS(ip_hdr(pkt->skb)->tos); + fl.u.ip4.flowi4_mark = pkt->skb->mark; break; case NFPROTO_IPV6: fl.u.ip6.daddr = ct->tuplehash[dir].tuple.src.u3.in6; + fl.u.ip6.saddr = ct->tuplehash[dir].tuple.dst.u3.in6; fl.u.ip6.flowi6_oif = nft_in(pkt)->ifindex; + fl.u.ip6.flowi6_iif = this_dst->dev->ifindex; + fl.u.ip6.flowlabel = ip6_flowinfo(ipv6_hdr(pkt->skb)); + fl.u.ip6.flowi6_mark = pkt->skb->mark; break; } -- 2.39.5