projects / mirror_frr.git / blame
| Commit | Line | Data |
|---|---|---|
| 165b5fff JB |
1 | /* $QuaggaId: Format:%an, %ai, %h$ $ |
| 2 | * | |
| 3 | * BGP Multipath | |
| 4 | * Copyright (C) 2010 Google Inc. | |
| 5 | * | |
| 6 | * This file is part of Quagga | |
| 7 | * | |
| 8 | * Quagga is free software; you can redistribute it and/or modify it | |
| 9 | * under the terms of the GNU General Public License as published by the | |
| 10 | * Free Software Foundation; either version 2, or (at your option) any | |
| 11 | * later version. | |
| 12 | * | |
| 13 | * Quagga is distributed in the hope that it will be useful, but | |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 | * General Public License for more details. | |
| 17 | * | |
| 18 | * You should have received a copy of the GNU General Public License | |
| 19 | * along with Quagga; see the file COPYING. If not, write to the Free | |
| 20 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
| 21 | * 02111-1307, USA. | |
| 22 | */ | |
| 23 | ||
| 24 | #ifndef _QUAGGA_BGP_MPATH_H | |
| 25 | #define _QUAGGA_BGP_MPATH_H | |
| 26 | ||
| de8d5dff JB |
27 | /* Supplemental information linked to bgp_info for keeping track of |
| 28 | * multipath selections, lazily allocated to save memory | |
| 29 | */ | |
| 30 | struct bgp_info_mpath | |
| 31 | { | |
| 32 | /* Points to the first multipath (on bestpath) or the next multipath */ | |
| 33 | struct bgp_info_mpath *mp_next; | |
| 34 | ||
| 35 | /* Points to the previous multipath or NULL on bestpath */ | |
| 36 | struct bgp_info_mpath *mp_prev; | |
| 37 | ||
| 38 | /* Points to bgp_info associated with this multipath info */ | |
| 39 | struct bgp_info *mp_info; | |
| 40 | ||
| 41 | /* When attached to best path, the number of selected multipaths */ | |
| 42 | u_int32_t mp_count; | |
| 0b597ef0 JB |
43 | |
| 44 | /* Aggregated attribute for advertising multipath route */ | |
| 45 | struct attr *mp_attr; | |
| de8d5dff JB |
46 | }; |
| 47 | ||
| 165b5fff | 48 | /* Functions to support maximum-paths configuration */ |
| 5e242b0d DS |
49 | extern int bgp_maximum_paths_set (struct bgp *, afi_t, safi_t, int, u_int16_t, |
| 50 | u_int16_t); | |
| 165b5fff JB |
51 | extern int bgp_maximum_paths_unset (struct bgp *, afi_t, safi_t, int); |
| 52 | ||
| 96450faf JB |
53 | /* Functions used by bgp_best_selection to record current |
| 54 | * multipath selections | |
| 55 | */ | |
| 7dc9d4e4 | 56 | extern int bgp_info_nexthop_cmp (struct bgp_info *bi1, struct bgp_info *bi2); |
| 96450faf JB |
57 | extern void bgp_mp_list_init (struct list *); |
| 58 | extern void bgp_mp_list_clear (struct list *); | |
| 59 | extern void bgp_mp_list_add (struct list *, struct bgp_info *); | |
| 6918e74b | 60 | extern void bgp_mp_dmed_deselect (struct bgp_info *); |
| de8d5dff JB |
61 | extern void bgp_info_mpath_update (struct bgp_node *, struct bgp_info *, |
| 62 | struct bgp_info *, struct list *, | |
| 63 | struct bgp_maxpaths_cfg *); | |
| 0b597ef0 JB |
64 | extern void bgp_info_mpath_aggregate_update (struct bgp_info *, |
| 65 | struct bgp_info *); | |
| de8d5dff JB |
66 | |
| 67 | /* Unlink and free multipath information associated with a bgp_info */ | |
| 68 | extern void bgp_info_mpath_dequeue (struct bgp_info *); | |
| 69 | extern void bgp_info_mpath_free (struct bgp_info_mpath **); | |
| 70 | ||
| 71 | /* Walk list of multipaths associated with a best path */ | |
| 72 | extern struct bgp_info *bgp_info_mpath_first (struct bgp_info *); | |
| 73 | extern struct bgp_info *bgp_info_mpath_next (struct bgp_info *); | |
| 74 | ||
| 75 | /* Accessors for multipath information */ | |
| 76 | extern u_int32_t bgp_info_mpath_count (struct bgp_info *); | |
| 0b597ef0 | 77 | extern struct attr *bgp_info_mpath_attr (struct bgp_info *); |
| 96450faf | 78 | |
| 165b5fff | 79 | #endif /* _QUAGGA_BGP_MPATH_H */ |