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Diffstat (limited to '')
| -rw-r--r-- | bgpd/bgp_nht.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/bgpd/bgp_nht.h b/bgpd/bgp_nht.h new file mode 100644 index 0000000..43f0aa2 --- /dev/null +++ b/bgpd/bgp_nht.h @@ -0,0 +1,106 @@ +/* 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_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 + * safi - safi: to check which table nhs are being imported to + * 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, + safi_t safi, struct bgp_path_info *p, + struct peer *peer, int connected, + const struct prefix *orig_prefix); + +/** + * bgp_unlink_nexthop() - Unlink the nexthop object from the path structure. + * ARGUMENTS: + * p - path structure. + */ +extern void bgp_unlink_nexthop(struct bgp_path_info *p); +void bgp_unlink_nexthop_by_peer(struct peer *peer); +void bgp_replace_nexthop_by_peer(struct peer *from, struct peer *to); +/** + * 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); + +/* + * Add or remove the tracking of the bgp_path_info that + * uses this nexthop + */ +extern void path_nh_map(struct bgp_path_info *path, + struct bgp_nexthop_cache *bnc, bool make); +/* + * When we actually have the connection to + * the zebra daemon, we need to reregister + * any nexthops we may have sitting around + */ +extern void bgp_nht_register_nexthops(struct bgp *bgp); + +/* + * When we have the the PEER_FLAG_CAPABILITY_ENHE flag + * set on a peer *after* it has been brought up we need + * to notice and setup the interface based RA, + * this code can walk the registered nexthops and + * register the important ones with zebra for RA. + */ +extern void bgp_nht_reg_enhe_cap_intfs(struct peer *peer); +extern void bgp_nht_dereg_enhe_cap_intfs(struct peer *peer); +extern void evaluate_paths(struct bgp_nexthop_cache *bnc); + +/* APIs for setting up and allocating L3 nexthop group ids */ +extern uint32_t bgp_l3nhg_id_alloc(void); +extern void bgp_l3nhg_id_free(uint32_t nhg_id); +extern void bgp_l3nhg_init(void); +void bgp_l3nhg_finish(void); + +extern void bgp_nht_ifp_up(struct interface *ifp); +extern void bgp_nht_ifp_down(struct interface *ifp); + +extern void bgp_nht_interface_events(struct peer *peer); +#endif /* _BGP_NHT_H */ |