pimd/pim_nht.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * PIM for Quagga
   4  * Copyright (C) 2017 Cumulus Networks, Inc.
   5  * Chirag Shah
   6  */
   7 #ifndef PIM_NHT_H
   8 #define PIM_NHT_H
   9
  10 #include "prefix.h"
  11 #include <zebra.h>
  12 #include "zclient.h"
  13 #include "vrf.h"
  14
  15 #include "pimd.h"
  16 #include "pim_rp.h"
  17 #include "pim_rpf.h"
  18
  19 /* PIM nexthop cache value structure. */
  20 struct pim_nexthop_cache {
  21         struct pim_rpf rpf;
  22         /* IGP route's metric. */
  23         uint32_t metric;
  24         uint32_t distance;
  25         /* Nexthop number and nexthop linked list. */
  26         uint8_t nexthop_num;
  27         struct nexthop *nexthop;
  28         int64_t last_update;
  29         uint16_t flags;
  30 #define PIM_NEXTHOP_VALID             (1 << 0)
  31 #define PIM_NEXTHOP_ANSWER_RECEIVED   (1 << 1)
  32
  33         struct list *rp_list;
  34         struct hash *upstream_hash;
  35
  36         /* bsr_count won't currently go above 1 as we only have global_scope,
  37          * but if anyone adds scope support multiple scopes may NHT-track the
  38          * same BSR
  39          */
  40         uint32_t bsr_count;
  41 };
  42
  43 struct pnc_hash_walk_data {
  44         struct pim_instance *pim;
  45         struct interface *ifp;
  46 };
  47
  48 int pim_parse_nexthop_update(ZAPI_CALLBACK_ARGS);
  49 int pim_find_or_track_nexthop(struct pim_instance *pim, pim_addr addr,
  50                               struct pim_upstream *up, struct rp_info *rp,
  51                               struct pim_nexthop_cache *out_pnc);
  52 void pim_delete_tracked_nexthop(struct pim_instance *pim, pim_addr addr,
  53                                 struct pim_upstream *up, struct rp_info *rp);
  54 struct pim_nexthop_cache *pim_nexthop_cache_find(struct pim_instance *pim,
  55                                                  struct pim_rpf *rpf);
  56 uint32_t pim_compute_ecmp_hash(struct prefix *src, struct prefix *grp);
  57 int pim_ecmp_nexthop_lookup(struct pim_instance *pim,
  58                             struct pim_nexthop *nexthop, pim_addr src,
  59                             struct prefix *grp, int neighbor_needed);
  60 void pim_sendmsg_zebra_rnh(struct pim_instance *pim, struct zclient *zclient,
  61                            struct pim_nexthop_cache *pnc, int command);
  62 int pim_ecmp_fib_lookup_if_vif_index(struct pim_instance *pim, pim_addr src,
  63                                      struct prefix *grp);
  64 void pim_rp_nexthop_del(struct rp_info *rp_info);
  65
  66 /* for RPF check on BSM message receipt */
  67 void pim_nht_bsr_add(struct pim_instance *pim, pim_addr bsr_addr);
  68 void pim_nht_bsr_del(struct pim_instance *pim, pim_addr bsr_addr);
  69 /* RPF(bsr_addr) == src_ip%src_ifp? */
  70 bool pim_nht_bsr_rpf_check(struct pim_instance *pim, pim_addr bsr_addr,
  71                            struct interface *src_ifp, pim_addr src_ip);
  72 void pim_upstream_nh_if_update(struct pim_instance *pim, struct interface *ifp);
  73 #endif