From: Eric Dumazet Date: Tue, 16 Oct 2012 22:33:29 +0000 (+0000) Subject: netfilter: xt_TEE: don't use destination address found in header X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=2ad5b9e4bd314fc685086b99e90e5de3bc59e26b;p=openwrt%2Fstaging%2Fblogic.git netfilter: xt_TEE: don't use destination address found in header Torsten Luettgert bisected TEE regression starting with commit f8126f1d5136be1 (ipv4: Adjust semantics of rt->rt_gateway.) The problem is that it tries to ARP-lookup the original destination address of the forwarded packet, not the address of the gateway. Fix this using FLOWI_FLAG_KNOWN_NH Julian added in commit c92b96553a80c1 (ipv4: Add FLOWI_FLAG_KNOWN_NH), so that known nexthop (info->gw.ip) has preference on resolving. Reported-by: Torsten Luettgert Bisected-by: Torsten Luettgert Tested-by: Torsten Luettgert Cc: Julian Anastasov Signed-off-by: Eric Dumazet Signed-off-by: Pablo Neira Ayuso --- diff --git a/net/netfilter/xt_TEE.c b/net/netfilter/xt_TEE.c index ee2e5bc5a8c7..bd93e51d30ac 100644 --- a/net/netfilter/xt_TEE.c +++ b/net/netfilter/xt_TEE.c @@ -70,6 +70,7 @@ tee_tg_route4(struct sk_buff *skb, const struct xt_tee_tginfo *info) fl4.daddr = info->gw.ip; fl4.flowi4_tos = RT_TOS(iph->tos); fl4.flowi4_scope = RT_SCOPE_UNIVERSE; + fl4.flowi4_flags = FLOWI_FLAG_KNOWN_NH; rt = ip_route_output_key(net, &fl4); if (IS_ERR(rt)) return false;