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
  17  * along with this program; see the file COPYING; if not, write to the
  18  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  19  * MA 02110-1301 USA
  20  */
  21 #ifndef PIM_NHT_H
  22 #define PIM_NHT_H
  23
  24 #include "prefix.h"
  25 #include <zebra.h>
  26 #include "zclient.h"
  27 #include "vrf.h"
  28
  29 #include "pimd.h"
  30 #include "pim_rp.h"
  31 #include "pim_rpf.h"
  32
  33 /* PIM nexthop cache value structure. */
  34 struct pim_nexthop_cache
  35 {
  36   struct pim_rpf rpf;
  37   /* IGP route's metric. */
  38   u_int32_t metric;
  39   uint32_t  distance;
  40   /* Nexthop number and nexthop linked list. */
  41   u_char nexthop_num;
  42   struct nexthop *nexthop;
  43   int64_t last_update;
  44   u_int16_t flags;
  45 #define PIM_NEXTHOP_VALID             (1 << 0)
  46
  47   struct list *rp_list;
  48   struct list *upstream_list;
  49 };
  50
  51 int pim_parse_nexthop_update (int command, struct zclient *zclient,
  52                               zebra_size_t length, vrf_id_t vrf_id);
  53 int pim_find_or_track_nexthop (struct prefix *addr, struct pim_upstream *up,
  54                                struct rp_info *rp, struct pim_nexthop_cache *out_pnc);
  55 void pim_delete_tracked_nexthop (struct prefix *addr, struct pim_upstream *up,
  56                                  struct rp_info *rp);
  57 struct pim_nexthop_cache *pim_nexthop_cache_add (struct pim_rpf *rpf_addr);
  58 struct pim_nexthop_cache *pim_nexthop_cache_find (struct pim_rpf *rpf);
  59 uint32_t pim_compute_ecmp_hash (struct prefix *src, struct prefix *grp);
  60 int pim_ecmp_nexthop_search (struct pim_nexthop_cache * pnc,
  61                          struct pim_nexthop *nexthop, struct prefix *src,
  62                          struct prefix *grp, int neighbor_needed);
  63 int pim_ecmp_nexthop_lookup (struct pim_nexthop *nexthop, struct in_addr addr,
  64                          struct prefix *src, struct prefix *grp,
  65                          int neighbor_needed);
  66 void pim_sendmsg_zebra_rnh (struct zclient *zclient, struct pim_nexthop_cache *pnc,
  67                           int command);
  68 void pim_resolve_upstream_nh (struct prefix *nht_p);
  69 #endif