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git.proxmox.com Git - mirror_frr.git/blob - bgpd/bgp_mpath.h
3 * Copyright (C) 2010 Google Inc.
5 * This file is part of Quagga
7 * Quagga is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2, or (at your option) any
12 * Quagga is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Quagga; see the file COPYING. If not, write to the Free
19 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
23 #ifndef _QUAGGA_BGP_MPATH_H
24 #define _QUAGGA_BGP_MPATH_H
26 /* Supplemental information linked to bgp_info for keeping track of
27 * multipath selections, lazily allocated to save memory
31 /* Points to the first multipath (on bestpath) or the next multipath */
32 struct bgp_info_mpath
*mp_next
;
34 /* Points to the previous multipath or NULL on bestpath */
35 struct bgp_info_mpath
*mp_prev
;
37 /* Points to bgp_info associated with this multipath info */
38 struct bgp_info
*mp_info
;
40 /* When attached to best path, the number of selected multipaths */
43 /* Aggregated attribute for advertising multipath route */
47 /* Functions to support maximum-paths configuration */
48 extern int bgp_maximum_paths_set (struct bgp
*, afi_t
, safi_t
, int, u_int16_t
,
50 extern int bgp_maximum_paths_unset (struct bgp
*, afi_t
, safi_t
, int);
52 /* Functions used by bgp_best_selection to record current
53 * multipath selections
55 extern int bgp_info_nexthop_cmp (struct bgp_info
*bi1
, struct bgp_info
*bi2
);
56 extern void bgp_mp_list_init (struct list
*);
57 extern void bgp_mp_list_clear (struct list
*);
58 extern void bgp_mp_list_add (struct list
*, struct bgp_info
*);
59 extern void bgp_mp_dmed_deselect (struct bgp_info
*);
60 extern void bgp_info_mpath_update (struct bgp_node
*, struct bgp_info
*,
61 struct bgp_info
*, struct list
*,
62 struct bgp_maxpaths_cfg
*);
63 extern void bgp_info_mpath_aggregate_update (struct bgp_info
*,
66 /* Unlink and free multipath information associated with a bgp_info */
67 extern void bgp_info_mpath_dequeue (struct bgp_info
*);
68 extern void bgp_info_mpath_free (struct bgp_info_mpath
**);
70 /* Walk list of multipaths associated with a best path */
71 extern struct bgp_info
*bgp_info_mpath_first (struct bgp_info
*);
72 extern struct bgp_info
*bgp_info_mpath_next (struct bgp_info
*);
74 /* Accessors for multipath information */
75 extern u_int32_t
bgp_info_mpath_count (struct bgp_info
*);
76 extern struct attr
*bgp_info_mpath_attr (struct bgp_info
*);
78 #endif /* _QUAGGA_BGP_MPATH_H */