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/*
* PIM for Quagga
* Copyright (C) 2008 Everton da Silva Marques
*
* 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_RPF_H
#define PIM_RPF_H
#include <zebra.h>
#include "pim_upstream.h"
#include "pim_neighbor.h"
/*
RFC 4601:
Metric Preference
Preference value assigned to the unicast routing protocol that
provided the route to the multicast source or Rendezvous-Point.
Metric
The unicast routing table metric associated with the route used to
reach the multicast source or Rendezvous-Point. The metric is in
units applicable to the unicast routing protocol used.
*/
struct pim_nexthop {
struct in_addr last_lookup;
long long last_lookup_time;
struct interface *interface; /* RPF_interface(S) */
struct prefix mrib_nexthop_addr; /* MRIB.next_hop(S) */
uint32_t mrib_metric_preference; /* MRIB.pref(S) */
uint32_t mrib_route_metric; /* MRIB.metric(S) */
struct pim_neighbor *nbr;
};
struct pim_rpf {
struct pim_nexthop source_nexthop;
struct prefix rpf_addr; /* RPF'(S,G) */
};
enum pim_rpf_result {
PIM_RPF_OK = 0,
PIM_RPF_CHANGED,
PIM_RPF_FAILURE
};
struct pim_upstream;
extern long long nexthop_lookups_avoided;
int pim_nexthop_lookup(struct pim_nexthop *nexthop, struct in_addr addr, int neighbor_needed);
enum pim_rpf_result pim_rpf_update(struct pim_upstream *up, struct pim_rpf *old, uint8_t is_new);
int pim_rpf_addr_is_inaddr_none (struct pim_rpf *rpf);
int pim_rpf_addr_is_inaddr_any (struct pim_rpf *rpf);
int pim_rpf_is_same (struct pim_rpf *rpf1, struct pim_rpf *rpf2);
void pim_rpf_set_refresh_time (void);
#endif /* PIM_RPF_H */
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