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3347aaafec
Add support for proper handling of multiple routes with the same network to the static protocol. Routes are distinguished by internal index, which is assigned automatically (sequentially for routes within each network). Having different route preference or igp_metric attribute is optional.
73 lines
2.7 KiB
C
73 lines
2.7 KiB
C
/*
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* BIRD -- Static Route Generator
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*
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* (c) 1998--2000 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_STATIC_H_
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#define _BIRD_STATIC_H_
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#include "nest/route.h"
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#include "nest/bfd.h"
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#include "lib/buffer.h"
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struct static_config {
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struct proto_config c;
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list routes; /* List of static routes (struct static_route) */
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int check_link; /* Whether iface link state is used */
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struct rtable_config *igp_table_ip4; /* Table for recursive IPv4 next hop lookups */
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struct rtable_config *igp_table_ip6; /* Table for recursive IPv6 next hop lookups */
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};
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struct static_proto {
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struct proto p;
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struct event *event; /* Event for announcing updated routes */
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BUFFER_(struct static_route *) marked; /* Routes marked for reannouncement */
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rtable *igp_table_ip4; /* Table for recursive IPv4 next hop lookups */
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rtable *igp_table_ip6; /* Table for recursive IPv6 next hop lookups */
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};
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struct static_route {
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node n;
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net_addr *net; /* Network we route */
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ip_addr via; /* Destination router */
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struct iface *iface; /* Destination iface, for link-local vias or device routes */
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struct neighbor *neigh; /* Associated neighbor entry */
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struct static_route *chain; /* Next for the same neighbor */
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struct static_route *mp_head; /* First nexthop of this route */
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struct static_route *mp_next; /* Nexthops for multipath routes */
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struct f_line *cmds; /* List of commands for setting attributes */
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uint index; /* Distinguish different routes with same net */
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byte dest; /* Destination type (RTD_*) */
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byte state; /* State of route announcement (SRS_*) */
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byte active; /* Next hop is active (nbr/iface/BFD available) */
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byte onlink; /* Gateway is onlink regardless of IP ranges */
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byte weight; /* Multipath next hop weight */
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byte use_bfd; /* Configured to use BFD */
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struct bfd_request *bfd_req; /* BFD request, if BFD is used */
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mpls_label_stack *mls; /* MPLS label stack; may be NULL */
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};
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/*
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* Note that data fields neigh, chain, state, active and bfd_req are runtime
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* data, not real configuration data. Must be handled carefully.
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*
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* Regular (i.e. dest == RTD_UNICAST) routes use static_route structure for
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* additional next hops (fields mp_head, mp_next). Note that 'state' is for
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* whole route, while 'active' is for each next hop. Also note that fields
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* mp_head, mp_next, active are zero for other kinds of routes.
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*/
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#define RTDX_RECURSIVE 0x7f /* Phony dest value for recursive routes */
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#define SRS_DOWN 0 /* Route is not announced */
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#define SRS_CLEAN 1 /* Route is active and announced */
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#define SRS_DIRTY 2 /* Route changed since announcement */
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void static_show(struct proto *);
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#endif
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