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| author |   Lorenzo Colitti <lorenzo@google.com> | 2014-05-13 10:17:33 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-05-13 18:35:08 -0400 |
| commit | e110861f86094cd78cc85593b873970092deb43a (patch) | |
| tree | 535ecba8f65cefb68da0846ff54801bb32bf3c9e /net/ipv6/sysctl_net_ipv6.c | |
| parent | Merge branch 'arc_emac-next' (diff) | |
| download | linux-dev-e110861f86094cd78cc85593b873970092deb43a.tar.xz linux-dev-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/sysctl_net_ipv6.c')
| -rw-r--r-- | net/ipv6/sysctl_net_ipv6.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/ipv6/sysctl_net_ipv6.c b/net/ipv6/sysctl_net_ipv6.c index 7f405a168822..058f3eca2e53 100644 --- a/net/ipv6/sysctl_net_ipv6.c +++ b/net/ipv6/sysctl_net_ipv6.c @@ -38,6 +38,13 @@ static struct ctl_table ipv6_table_template[] = { .mode = 0644, .proc_handler = proc_dointvec }, + { + .procname = "fwmark_reflect", + .data = &init_net.ipv6.sysctl.fwmark_reflect, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec + }, { } }; |