Hi Pau,
Cc'ing Lorenzo, I think the original intention is to cover this case
too.
On Thu, Dec 15, 2016 at 01:43:43PM +0100, Pau Espin Pedrol wrote:
> Otherwise, RST packets generated by ipt_REJECT always have mark 0 when
> the routing is checked later in the same code path.
I think this is fixing e110861f8609. So please add this before your
Signed-off-by tag.
Fixes: e110861f8609 ("net: add a sysctl to reflect the fwmark on replies")
More comments below.
> Signed-off-by: Pau Espin Pedrol <pau.espin@xxxxxxxxxxxx>
> ---
> net/ipv4/netfilter/nf_reject_ipv4.c | 2 ++
> net/ipv6/netfilter/nf_reject_ipv6.c | 3 +++
> 2 files changed, 5 insertions(+)
>
> diff --git a/net/ipv4/netfilter/nf_reject_ipv4.c b/net/ipv4/netfilter/nf_reject_ipv4.c
> index fd82202..d088295 100644
> --- a/net/ipv4/netfilter/nf_reject_ipv4.c
> +++ b/net/ipv4/netfilter/nf_reject_ipv4.c
> @@ -126,6 +126,8 @@ void nf_send_reset(struct net *net, struct sk_buff *oldskb, int hook)
> /* ip_route_me_harder expects skb->dst to be set */
> skb_dst_set_noref(nskb, skb_dst(oldskb));
>
> + nskb->mark = IP4_REPLY_MARK(dev_net(oldskb->dev), oldskb->mark);
nf_send_reset() already takes 'struct net *' as parameter, so no need
to look up for net again via dev_net().
> +
> skb_reserve(nskb, LL_MAX_HEADER);
> niph = nf_reject_iphdr_put(nskb, oldskb, IPPROTO_TCP,
> ip4_dst_hoplimit(skb_dst(nskb)));
> diff --git a/net/ipv6/netfilter/nf_reject_ipv6.c b/net/ipv6/netfilter/nf_reject_ipv6.c
> index 1009040..008b0ce 100644
> --- a/net/ipv6/netfilter/nf_reject_ipv6.c
> +++ b/net/ipv6/netfilter/nf_reject_ipv6.c
> @@ -152,6 +152,7 @@ void nf_send_reset6(struct net *net, struct sk_buff *oldskb, int hook)
>
> memset(&fl6, 0, sizeof(fl6));
> fl6.flowi6_proto = IPPROTO_TCP;
> + fl6.flowi6_mark = IP6_REPLY_MARK(dev_net(oldskb->dev), oldskb->mark);
Same thing here.
Please, address this feedback and send a v2. Thanks.
> fl6.saddr = oip6h->daddr;
> fl6.daddr = oip6h->saddr;
> fl6.fl6_sport = otcph->dest;
> @@ -180,6 +181,8 @@ void nf_send_reset6(struct net *net, struct sk_buff *oldskb, int hook)
>
> skb_dst_set(nskb, dst);
>
> + nskb->mark = fl6.flowi6_mark;
> +
> skb_reserve(nskb, hh_len + dst->header_len);
> ip6h = nf_reject_ip6hdr_put(nskb, oldskb, IPPROTO_TCP,
> ip6_dst_hoplimit(dst));
> --
> 2.7.4
>
>
> --
>
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