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/* BGP Nexthop tracking
* Copyright (C) 2013 Cumulus Networks, Inc.
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _BGP_NHT_H
#define _BGP_NHT_H
/**
* bgp_parse_nexthop_update() - parse a nexthop update message from Zebra.
*/
extern void bgp_parse_nexthop_update(int command, vrf_id_t vrf_id);
/**
* bgp_find_nexthop() - lookup the nexthop cache table for the bnc object
* ARGUMENTS:
* p - path for which the nexthop object is being looked up
* connected - True if NH MUST be a connected route
*/
extern int bgp_find_nexthop(struct bgp_info *p, int connected);
/**
* bgp_find_or_add_nexthop() - lookup the nexthop cache table for the bnc
* object. If not found, create a new object and register with ZEBRA for
* nexthop notification.
* ARGUMENTS:
* bgp_route - BGP instance of route
* bgp_nexthop - BGP instance of nexthop
* a - afi: AFI_IP or AF_IP6
* p - path for which the nexthop object is being looked up
* peer - The BGP peer associated with this NHT
* connected - True if NH MUST be a connected route
*/
extern int bgp_find_or_add_nexthop(struct bgp *bgp_route,
struct bgp *bgp_nexthop, afi_t a, struct bgp_info *p,
struct peer *peer, int connected);
/**
* bgp_unlink_nexthop() - Unlink the nexthop object from the path structure.
* ARGUMENTS:
* p - path structure.
*/
extern void bgp_unlink_nexthop(struct bgp_info *p);
void bgp_unlink_nexthop_by_peer(struct peer *);
/**
* bgp_delete_connected_nexthop() - Reset the 'peer' pointer for a connected
* nexthop entry. If no paths reference the nexthop, it will be unregistered
* and freed.
* ARGUMENTS:
* afi - afi: AFI_IP or AF_IP6
* peer - Ptr to peer
*/
extern void bgp_delete_connected_nexthop(afi_t afi, struct peer *peer);
/*
* Cleanup nexthop registration and status information for BGP nexthops
* pertaining to this VRF. This is invoked upon VRF deletion.
*/
extern void bgp_cleanup_nexthops(struct bgp *bgp);
#endif /* _BGP_NHT_H */
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