5b441ac878
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>
20 lines
314 B
C
20 lines
314 B
C
/*
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* mpls in net namespaces
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*/
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#ifndef __NETNS_MPLS_H__
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#define __NETNS_MPLS_H__
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struct mpls_route;
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struct ctl_table_header;
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struct netns_mpls {
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int ip_ttl_propagate;
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size_t platform_labels;
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struct mpls_route __rcu * __rcu *platform_label;
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struct ctl_table_header *ctl;
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};
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#endif /* __NETNS_MPLS_H__ */
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