forked from Mirror/frr
caef8f7961
NHT won't have a result yet when we get the first BSM from a new BSR. Hence, the first packet(s) are lost, since their RPF validation fails. Re-add the blocking RPF check that was there before (though in a much more sensible manner.) Also nuke the now-unused pim_nexthop_match* functions. Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
82 lines
2.9 KiB
C
82 lines
2.9 KiB
C
/*
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* PIM for Quagga
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* Copyright (C) 2017 Cumulus Networks, Inc.
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* Chirag Shah
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef PIM_NHT_H
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#define PIM_NHT_H
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#include "prefix.h"
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#include <zebra.h>
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#include "zclient.h"
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#include "vrf.h"
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#include "pimd.h"
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#include "pim_rp.h"
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#include "pim_rpf.h"
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/* PIM nexthop cache value structure. */
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struct pim_nexthop_cache {
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struct pim_rpf rpf;
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/* IGP route's metric. */
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uint32_t metric;
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uint32_t distance;
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/* Nexthop number and nexthop linked list. */
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uint8_t nexthop_num;
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struct nexthop *nexthop;
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int64_t last_update;
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uint16_t flags;
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#define PIM_NEXTHOP_VALID (1 << 0)
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#define PIM_NEXTHOP_ANSWER_RECEIVED (1 << 1)
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struct list *rp_list;
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struct hash *upstream_hash;
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/* bsr_count won't currently go above 1 as we only have global_scope,
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* but if anyone adds scope support multiple scopes may NHT-track the
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* same BSR
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*/
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uint32_t bsr_count;
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};
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int pim_parse_nexthop_update(ZAPI_CALLBACK_ARGS);
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int pim_find_or_track_nexthop(struct pim_instance *pim, struct prefix *addr,
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struct pim_upstream *up, struct rp_info *rp,
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struct pim_nexthop_cache *out_pnc);
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void pim_delete_tracked_nexthop(struct pim_instance *pim, struct prefix *addr,
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struct pim_upstream *up, struct rp_info *rp);
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struct pim_nexthop_cache *pim_nexthop_cache_find(struct pim_instance *pim,
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struct pim_rpf *rpf);
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uint32_t pim_compute_ecmp_hash(struct prefix *src, struct prefix *grp);
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int pim_ecmp_nexthop_lookup(struct pim_instance *pim,
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struct pim_nexthop *nexthop, struct prefix *src,
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struct prefix *grp, int neighbor_needed);
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void pim_sendmsg_zebra_rnh(struct pim_instance *pim, struct zclient *zclient,
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struct pim_nexthop_cache *pnc, int command);
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int pim_ecmp_fib_lookup_if_vif_index(struct pim_instance *pim,
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struct prefix *src, struct prefix *grp);
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void pim_rp_nexthop_del(struct rp_info *rp_info);
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/* for RPF check on BSM message receipt */
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void pim_nht_bsr_add(struct pim_instance *pim, struct in_addr bsr_addr);
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void pim_nht_bsr_del(struct pim_instance *pim, struct in_addr bsr_addr);
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/* RPF(bsr_addr) == src_ip%src_ifp? */
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bool pim_nht_bsr_rpf_check(struct pim_instance *pim, struct in_addr bsr_addr,
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struct interface *src_ifp, struct in_addr src_ip);
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#endif
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