bgpd/bgp_nht.h

   1 /* BGP Nexthop tracking
   2  * Copyright (C) 2013 Cumulus Networks, Inc.
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
  18  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19  * 02111-1307, USA.
  20  */
  21
  22 #ifndef _BGP_NHT_H
  23 #define _BGP_NHT_H
  24
  25 /**
  26  * bgp_parse_nexthop_update() - parse a nexthop update message from Zebra.
  27  */
  28 extern void bgp_parse_nexthop_update(int command, vrf_id_t vrf_id);
  29
  30 /**
  31  * bgp_find_nexthop() - lookup the nexthop cache table for the bnc object
  32  * ARGUMENTS:
  33  *   p - path for which the nexthop object is being looked up
  34  *   connected - True if NH MUST be a connected route
  35  */
  36 extern int bgp_find_nexthop(struct bgp_info *p, int connected);
  37
  38 /**
  39  * bgp_find_or_add_nexthop() - lookup the nexthop cache table for the bnc
  40  *  object. If not found, create a new object and register with ZEBRA for
  41  *  nexthop notification.
  42  * ARGUMENTS:
  43  *   bgp - BGP instance
  44  *   a - afi: AFI_IP or AF_IP6
  45  *   p - path for which the nexthop object is being looked up
  46  *   peer - The BGP peer associated with this NHT
  47  *   connected - True if NH MUST be a connected route
  48  */
  49 extern int bgp_find_or_add_nexthop(struct bgp *bgp, afi_t a, struct bgp_info *p,
  50                                    struct peer *peer, int connected);
  51
  52 /**
  53  * bgp_unlink_nexthop() - Unlink the nexthop object from the path structure.
  54  * ARGUMENTS:
  55  *   p - path structure.
  56  */
  57 extern void bgp_unlink_nexthop(struct bgp_info *p);
  58 void bgp_unlink_nexthop_by_peer(struct peer *);
  59
  60 /**
  61  * bgp_delete_connected_nexthop() - Reset the 'peer' pointer for a connected
  62  * nexthop entry. If no paths reference the nexthop, it will be unregistered
  63  * and freed.
  64  * ARGUMENTS:
  65  *   afi - afi: AFI_IP or AF_IP6
  66  *   peer - Ptr to peer
  67  */
  68 extern void bgp_delete_connected_nexthop(afi_t afi, struct peer *peer);
  69
  70 #endif /* _BGP_NHT_H */