tree ac11af07cf40a14c90b6bbd00c3c795719516992
parent 0f7bbd5805e3d32e3ee58d1a802a8404a724f2fc
author Eric W. Biederman <ebiederm@xmission.com> 1425767003 -0600
committer David S. Miller <davem@davemloft.net> 1425857406 -0400

mpls: Correct the ttl decrement.

According to RFC3032 section 2.4.2  packets with an outgoing
ttl of 0 MUST NOT be forwarded.  According to section 2.4.1
an outgoing TTL of 0 comes from an incomming TTL <= 1.

Therefore any packets that is received with a ttl <= 1 should
not have it's ttl decremented and forwarded.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>