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/*
* PIM for Quagga
* Copyright (C) 2017 Cumulus Networks, Inc.
* Chirag Shah
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 PIM_NHT_H
#define PIM_NHT_H
#include "prefix.h"
#include <zebra.h>
#include "zclient.h"
#include "vrf.h"
#include "pimd.h"
#include "pim_rp.h"
#include "pim_rpf.h"
/* PIM nexthop cache value structure. */
struct pim_nexthop_cache {
struct pim_rpf rpf;
/* IGP route's metric. */
uint32_t metric;
uint32_t distance;
/* Nexthop number and nexthop linked list. */
uint8_t nexthop_num;
struct nexthop *nexthop;
int64_t last_update;
uint16_t flags;
#define PIM_NEXTHOP_VALID (1 << 0)
#define PIM_NEXTHOP_ANSWER_RECEIVED (1 << 1)
struct list *rp_list;
struct hash *upstream_hash;
/* Ideally this has to be list of scope zone. But for now we can just
* have as a bool variable to say bsr_tracking.
* Later this variable can be changed as a list of scope zones for
* tracking same bsr for multiple scope zones.
*/
bool bsr_tracking;
};
int pim_parse_nexthop_update(ZAPI_CALLBACK_ARGS);
int pim_find_or_track_nexthop(struct pim_instance *pim, struct prefix *addr,
struct pim_upstream *up, struct rp_info *rp,
bool bsr_track_needed,
struct pim_nexthop_cache *out_pnc);
void pim_delete_tracked_nexthop(struct pim_instance *pim, struct prefix *addr,
struct pim_upstream *up, struct rp_info *rp,
bool del_bsr_tracking);
struct pim_nexthop_cache *pim_nexthop_cache_find(struct pim_instance *pim,
struct pim_rpf *rpf);
uint32_t pim_compute_ecmp_hash(struct prefix *src, struct prefix *grp);
int pim_ecmp_nexthop_lookup(struct pim_instance *pim,
struct pim_nexthop *nexthop, struct prefix *src,
struct prefix *grp, int neighbor_needed);
void pim_sendmsg_zebra_rnh(struct pim_instance *pim, struct zclient *zclient,
struct pim_nexthop_cache *pnc, int command);
int pim_ecmp_fib_lookup_if_vif_index(struct pim_instance *pim,
struct prefix *src, struct prefix *grp);
void pim_rp_nexthop_del(struct rp_info *rp_info);
bool pim_nexthop_match(struct pim_instance *pim, struct in_addr addr,
struct in_addr ip_src);
bool pim_nexthop_match_nht_cache(struct pim_instance *pim, struct in_addr addr,
struct in_addr ip_src);
#endif
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