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40381db785
ri -> pi bi -> bpi info -> path info -> rmap_path ( for routemap applications ) Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
83 lines
3.1 KiB
C
83 lines
3.1 KiB
C
/*
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* BGP Multipath
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* Copyright (C) 2010 Google Inc.
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*
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* This file is part of Quagga
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*
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* Quagga is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* Quagga is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _QUAGGA_BGP_MPATH_H
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#define _QUAGGA_BGP_MPATH_H
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/* Supplemental information linked to bgp_path_info for keeping track of
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* multipath selections, lazily allocated to save memory
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*/
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struct bgp_path_info_mpath {
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/* Points to the first multipath (on bestpath) or the next multipath */
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struct bgp_path_info_mpath *mp_next;
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/* Points to the previous multipath or NULL on bestpath */
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struct bgp_path_info_mpath *mp_prev;
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/* Points to bgp_path_info associated with this multipath info */
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struct bgp_path_info *mp_info;
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/* When attached to best path, the number of selected multipaths */
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uint32_t mp_count;
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/* Aggregated attribute for advertising multipath route */
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struct attr *mp_attr;
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};
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/* Functions to support maximum-paths configuration */
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extern int bgp_maximum_paths_set(struct bgp *, afi_t, safi_t, int, uint16_t,
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uint16_t);
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extern int bgp_maximum_paths_unset(struct bgp *, afi_t, safi_t, int);
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/* Functions used by bgp_best_selection to record current
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* multipath selections
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*/
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extern int bgp_path_info_nexthop_cmp(struct bgp_path_info *bpi1,
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struct bgp_path_info *bpi2);
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extern void bgp_mp_list_init(struct list *);
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extern void bgp_mp_list_clear(struct list *);
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extern void bgp_mp_list_add(struct list *mp_list, struct bgp_path_info *mpinfo);
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extern void bgp_mp_dmed_deselect(struct bgp_path_info *dmed_best);
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extern void bgp_path_info_mpath_update(struct bgp_node *rn,
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struct bgp_path_info *new_best,
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struct bgp_path_info *old_best,
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struct list *mp_list,
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struct bgp_maxpaths_cfg *mpath_cfg);
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extern void
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bgp_path_info_mpath_aggregate_update(struct bgp_path_info *new_best,
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struct bgp_path_info *old_best);
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/* Unlink and free multipath information associated with a bgp_path_info */
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extern void bgp_path_info_mpath_dequeue(struct bgp_path_info *path);
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extern void bgp_path_info_mpath_free(struct bgp_path_info_mpath **mpath);
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/* Walk list of multipaths associated with a best path */
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extern struct bgp_path_info *
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bgp_path_info_mpath_first(struct bgp_path_info *path);
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extern struct bgp_path_info *
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bgp_path_info_mpath_next(struct bgp_path_info *path);
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/* Accessors for multipath information */
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extern uint32_t bgp_path_info_mpath_count(struct bgp_path_info *path);
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extern struct attr *bgp_path_info_mpath_attr(struct bgp_path_info *path);
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#endif /* _QUAGGA_BGP_MPATH_H */
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