diff options
| author | Lorenzo Colitti <lorenzo@google.com> | 2014-05-13 19:17:33 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-05-14 00:35:08 +0200 |
| commit | e110861f86094cd78cc85593b873970092deb43a (patch) | |
| tree | 535ecba8f65cefb68da0846ff54801bb32bf3c9e /net/ipv6/tcp_ipv6.c | |
| parent | Merge branch 'arc_emac-next' (diff) | |
| download | linux-e110861f86094cd78cc85593b873970092deb43a.tar.xz linux-e110861f86094cd78cc85593b873970092deb43a.zip | |
net: add a sysctl to reflect the fwmark on replies
Kernel-originated IP packets that have no user socket associated
with them (e.g., ICMP errors and echo replies, TCP RSTs, etc.)
are emitted with a mark of zero. Add a sysctl to make them have
the same mark as the packet they are replying to.
This allows an administrator that wishes to do so to use
mark-based routing, firewalling, etc. for these replies by
marking the original packets inbound.
Tested using user-mode linux:
- ICMP/ICMPv6 echo replies and errors.
- TCP RST packets (IPv4 and IPv6).
Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/tcp_ipv6.c')
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 3a267bf14f2f..c54976a44425 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -812,6 +812,7 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win, fl6.flowi6_oif = inet6_iif(skb); else fl6.flowi6_oif = oif; + fl6.flowi6_mark = IP6_REPLY_MARK(net, skb->mark); fl6.fl6_dport = t1->dest; fl6.fl6_sport = t1->source; security_skb_classify_flow(skb, flowi6_to_flowi(&fl6)); |