netfilter: nf_nat: support mangling a single TCP packet multiple times
commit010c0b9f34a4c567b431f8b49a58b7332ed42e47
authorPatrick McHardy <kaber@trash.net>
Thu, 11 Feb 2010 11:27:09 +0000 (11 12:27 +0100)
committerPatrick McHardy <kaber@trash.net>
Thu, 11 Feb 2010 11:27:09 +0000 (11 12:27 +0100)
tree8922a2a87408ed185f3998011eab4c6a3e9f0c2b
parentf5b321bd37fbec9188feb1f721ab46a5ac0b35da
netfilter: nf_nat: support mangling a single TCP packet multiple times

nf_nat_mangle_tcp_packet() can currently only handle a single mangling
per window because it only maintains two sequence adjustment positions:
the one before the last adjustment and the one after.

This patch makes sequence number adjustment tracking in
nf_nat_mangle_tcp_packet() optional and allows a helper to manually
update the offsets after the packet has been fully handled.

Signed-off-by: Patrick McHardy <kaber@trash.net>
include/net/netfilter/nf_nat_helper.h
net/ipv4/netfilter/nf_nat_helper.c