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896014f4bc
The FSF's address changed, and we had a mixture of comment styles for the GPL file header. (The style with * at the beginning won out with 580 to 141 in existing files.) Note: I've intentionally left intact other "variations" of the copyright header, e.g. whether it says "Zebra", "Quagga", "FRR", or nothing. Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
78 lines
2.9 KiB
C
78 lines
2.9 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_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_info_mpath
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{
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/* Points to the first multipath (on bestpath) or the next multipath */
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struct bgp_info_mpath *mp_next;
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/* Points to the previous multipath or NULL on bestpath */
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struct bgp_info_mpath *mp_prev;
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/* Points to bgp_info associated with this multipath info */
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struct bgp_info *mp_info;
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/* When attached to best path, the number of selected multipaths */
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u_int32_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, u_int16_t,
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u_int16_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_info_nexthop_cmp (struct bgp_info *bi1, struct bgp_info *bi2);
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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 *, struct bgp_info *);
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extern void bgp_mp_dmed_deselect (struct bgp_info *);
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extern void bgp_info_mpath_update (struct bgp_node *, struct bgp_info *,
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struct bgp_info *, struct list *,
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struct bgp_maxpaths_cfg *);
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extern void bgp_info_mpath_aggregate_update (struct bgp_info *,
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struct bgp_info *);
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/* Unlink and free multipath information associated with a bgp_info */
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extern void bgp_info_mpath_dequeue (struct bgp_info *);
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extern void bgp_info_mpath_free (struct bgp_info_mpath **);
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/* Walk list of multipaths associated with a best path */
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extern struct bgp_info *bgp_info_mpath_first (struct bgp_info *);
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extern struct bgp_info *bgp_info_mpath_next (struct bgp_info *);
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/* Accessors for multipath information */
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extern u_int32_t bgp_info_mpath_count (struct bgp_info *);
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extern struct attr *bgp_info_mpath_attr (struct bgp_info *);
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#endif /* _QUAGGA_BGP_MPATH_H */
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