7126cadf80
The patch fixes several bugs introduced in previous changes, simplifies the protocol by handing routes uniformly, introduces asynchronous route processing to avoid issues with separate notifications for each next-hop in ECMP routes, and makes reconfiguration faster by avoiding quadratic complexity.
69 lines
2.4 KiB
C
69 lines
2.4 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; /* Table used for recursive 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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};
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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_inst *cmds; /* List of commands for setting attributes */
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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 weight; /* Multipath next hop weight */
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byte use_bfd; /* Configured to use BFD */
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byte label_count; /* Number of labels in stack */
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struct bfd_request *bfd_req; /* BFD request, if BFD is used */
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u32 *label_stack; /* Label stack if label_count > 0 */
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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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