linux/net/mpls
Robert Shearman 5b441ac878 mpls: allow TTL propagation to IP packets to be configured
Provide the ability to control on a per-route basis whether the TTL
value from an MPLS packet is propagated to an IPv4/IPv6 packet when
the last label is popped as per the theoretical model in RFC 3443
through a new route attribute, RTA_TTL_PROPAGATE which can be 0 to
mean disable propagation and 1 to mean enable propagation.

In order to provide the ability to change the behaviour for packets
arriving with IPv4/IPv6 Explicit Null labels and to provide an easy
way for a user to change the behaviour for all existing routes without
having to reprogram them, a global knob is provided. This is done
through the addition of a new per-namespace sysctl,
"net.mpls.ip_ttl_propagate", which defaults to enabled. If the
per-route attribute is set (either enabled or disabled) then it
overrides the global configuration.

Signed-off-by: Robert Shearman <rshearma@brocade.com>
Acked-by: David Ahern <dsa@cumulusnetworks.com>
Tested-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-13 15:29:22 -07:00
..
af_mpls.c mpls: allow TTL propagation to IP packets to be configured 2017-03-13 15:29:22 -07:00
internal.h mpls: allow TTL propagation to IP packets to be configured 2017-03-13 15:29:22 -07:00
Kconfig mpls: ip tunnel support 2015-07-21 10:39:05 -07:00
Makefile mpls: ip tunnel support 2015-07-21 10:39:05 -07:00
mpls_gso.c net: mpls: Fixups for GSO 2016-08-30 22:27:18 -07:00
mpls_iptunnel.c lwtunnel: remove device arg to lwtunnel_build_state 2017-01-30 15:14:22 -05:00