diff options
| 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 /include/net/ipv6.h | |
| parent | 87e067cda6df60b55cea0239c2f3cee81e9f46df (diff) | |
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 'include/net/ipv6.h')
| -rw-r--r-- | include/net/ipv6.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h index 5b40ad297b8c..ba810d0546bc 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -113,6 +113,9 @@ struct frag_hdr { #define IP6_MF 0x0001 #define IP6_OFFSET 0xFFF8 +#define IP6_REPLY_MARK(net, mark) \ + ((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0) + #include <net/sock.h> /* sysctls */ |