[NETFILTER]: nf_nat_sip: don't drop short packets

Don't drop packets shorter than "SIP/2.0", just ignore them. Keep-alives
can validly be shorter for example.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed