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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* PIM for Quagga
* Copyright (C) 2008 Everton da Silva Marques
*/
#ifndef PIM_RPF_H
#define PIM_RPF_H
#include <zebra.h>
#include "pim_str.h"
struct pim_instance;
struct pim_upstream;
/*
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 {
pim_addr last_lookup;
long long last_lookup_time;
struct interface *interface; /* RPF_interface(S) */
pim_addr 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;
pim_addr rpf_addr; /* RPF'(S,G) */
};
enum pim_rpf_result { PIM_RPF_OK = 0, PIM_RPF_CHANGED, PIM_RPF_FAILURE };
/* RPF lookup behaviour */
enum pim_rpf_lookup_mode {
MCAST_NO_CONFIG = 0, /* MIX_MRIB_FIRST, but no show in config write */
MCAST_MRIB_ONLY, /* MRIB only */
MCAST_URIB_ONLY, /* URIB only */
MCAST_MIX_MRIB_FIRST, /* MRIB, if nothing at all then URIB */
MCAST_MIX_DISTANCE, /* MRIB & URIB, lower distance wins */
MCAST_MIX_PFXLEN, /* MRIB & URIB, longer prefix wins */
/* on equal value, MRIB wins for last 2 */
};
enum pim_rpf_result pim_rpf_update(struct pim_instance *pim,
struct pim_upstream *up,
struct pim_rpf *old, const char *caller);
void pim_upstream_rpf_clear(struct pim_instance *pim,
struct pim_upstream *up);
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(struct pim_instance *pim);
#endif /* PIM_RPF_H */
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