| Pradosh Mohapatra | 60cc959 | 2015-11-09 20:21:41 -0500 | [diff] [blame] | 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(void); |
| 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 | * c - output variable that stores whether the nexthop object has changed |
| 35 | * since last time. |
| 36 | * m - output variable that stores whether the nexthop metric has changed |
| 37 | * since last time. |
| 38 | */ |
| 39 | extern int bgp_find_nexthop(struct bgp_info *p, int *c, int *m); |
| 40 | |
| 41 | /** |
| 42 | * bgp_find_or_add_nexthop() - lookup the nexthop cache table for the bnc |
| 43 | * object. If not found, create a new object and register with ZEBRA for |
| 44 | * nexthop notification. |
| 45 | * ARGUMENTS: |
| 46 | * a - afi: AFI_IP or AF_IP6 |
| 47 | * p - path for which the nexthop object is being looked up |
| 48 | * c - output variable that stores whether the nexthop object has changed |
| 49 | * since last time. |
| 50 | * m - output variable that stores whether the nexthop metric has changed |
| 51 | * since last time. |
| 52 | */ |
| 53 | extern int bgp_find_or_add_nexthop(afi_t a, struct bgp_info *p, int *c, int *m); |
| 54 | |
| 55 | /** |
| 56 | * bgp_unlink_nexthop() - Unlink the nexthop object from the path structure. |
| 57 | * ARGUMENTS: |
| 58 | * p - path structure. |
| 59 | */ |
| 60 | extern void bgp_unlink_nexthop(struct bgp_info *p); |
| 61 | |
| 62 | #endif /* _BGP_NHT_H */ |