pimd/pim_nht.h

   1 /*
   2  * PIM for Quagga
   3  * Copyright (C) 2017 Cumulus Networks, Inc.
   4  * Chirag Shah
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20 #ifndef PIM_NHT_H
  21 #define PIM_NHT_H
  22
  23 #include "prefix.h"
  24 #include <zebra.h>
  25 #include "zclient.h"
  26 #include "vrf.h"
  27
  28 #include "pimd.h"
  29 #include "pim_rp.h"
  30 #include "pim_rpf.h"
  31
  32 /* PIM nexthop cache value structure. */
  33 struct pim_nexthop_cache
  34 {
  35   struct pim_rpf rpf;
  36   /* IGP route's metric. */
  37   u_int32_t metric;
  38   uint32_t  distance;
  39   /* Nexthop number and nexthop linked list. */
  40   u_char nexthop_num;
  41   struct nexthop *nexthop;
  42   int64_t last_update;
  43   u_int16_t flags;
  44 #define PIM_NEXTHOP_VALID             (1 << 0)
  45
  46   struct list *rp_list;
  47   struct list *upstream_list;
  48 };
  49
  50 int pim_parse_nexthop_update (int command, struct zclient *zclient,
  51                               zebra_size_t length, vrf_id_t vrf_id);
  52 int pim_find_or_track_nexthop (struct prefix *addr, struct pim_upstream *up,
  53                                struct rp_info *rp, struct pim_nexthop_cache *out_pnc);
  54 void pim_delete_tracked_nexthop (struct prefix *addr, struct pim_upstream *up,
  55                                  struct rp_info *rp);
  56 struct pim_nexthop_cache *pim_nexthop_cache_add (struct pim_rpf *rpf_addr);
  57 struct pim_nexthop_cache *pim_nexthop_cache_find (struct pim_rpf *rpf);
  58 uint32_t pim_compute_ecmp_hash (struct prefix *src, struct prefix *grp);
  59 int pim_ecmp_nexthop_search (struct pim_nexthop_cache * pnc,
  60                          struct pim_nexthop *nexthop, struct prefix *src,
  61                          struct prefix *grp, int neighbor_needed);
  62 int pim_ecmp_nexthop_lookup (struct pim_nexthop *nexthop, struct in_addr addr,
  63                          struct prefix *src, struct prefix *grp,
  64                          int neighbor_needed);
  65 void pim_sendmsg_zebra_rnh (struct zclient *zclient, struct pim_nexthop_cache *pnc,
  66                           int command);
  67 int pim_update_rp_nh (struct pim_nexthop_cache *pnc);
  68 void pim_resolve_upstream_nh (struct prefix *nht_p);
  69 int pim_ecmp_fib_lookup_if_vif_index(struct in_addr addr,
  70                           struct prefix *src, struct prefix *grp);
  71 #endif