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a59166e470
Allow TTL propagation from IP packets to MPLS packets to be configured. Add a new optional LWT attribute, MPLS_IPTUNNEL_TTL, which allows the TTL to be set in the resulting MPLS packet, with the value of 0 having the semantics of enabling propagation of the TTL from the IP header (i.e. non-zero values disable propagation). Also allow the configuration to be overridden globally by reusing the same sysctl to control whether the TTL is propagated from IP packets into the MPLS header. If the per-LWT attribute is set then it overrides the global configuration. If the TTL isn't propagated then a default TTL value is used which can be configured via a new sysctl, "net.mpls.default_ttl". This is kept separate from the configuration of whether IP TTL propagation is enabled as it can be used in the future when non-IP payloads are supported (i.e. where there is no payload TTL that can be propagated). 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
332 B
C
20 lines
332 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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int default_ttl;
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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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