zebra/zebra_rnh.h

   1 /*
   2  * Zebra next hop tracking header
   3  * Copyright (C) 2013 Cumulus Networks, Inc.
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #ifndef _ZEBRA_RNH_H
  23 #define _ZEBRA_RNH_H
  24
  25 #include "prefix.h"
  26 #include "vty.h"
  27
  28 /* Nexthop structure. */
  29 struct rnh {
  30         uint8_t flags;
  31
  32 #define ZEBRA_NHT_CONNECTED     0x1
  33 #define ZEBRA_NHT_DELETED       0x2
  34 #define ZEBRA_NHT_EXACT_MATCH   0x4
  35
  36         /* VRF identifier. */
  37         vrf_id_t vrf_id;
  38
  39         struct route_entry *state;
  40         struct prefix resolved_route;
  41         struct list *client_list;
  42         struct list
  43                 *zebra_static_route_list; /* static routes dependent on this NH
  44                                              */
  45         struct list
  46                 *zebra_pseudowire_list; /* pseudowires dependent on this NH */
  47         struct route_node *node;
  48         int filtered[ZEBRA_ROUTE_MAX]; /* if this has been filtered for client
  49                                           */
  50 };
  51
  52 typedef enum { RNH_NEXTHOP_TYPE, RNH_IMPORT_CHECK_TYPE } rnh_type_t;
  53
  54 extern int zebra_rnh_ip_default_route;
  55 extern int zebra_rnh_ipv6_default_route;
  56
  57 extern void zebra_rnh_init(void);
  58
  59 static inline int rnh_resolve_via_default(int family)
  60 {
  61         if (((family == AF_INET) && zebra_rnh_ip_default_route)
  62             || ((family == AF_INET6) && zebra_rnh_ipv6_default_route))
  63                 return 1;
  64         else
  65                 return 0;
  66 }
  67
  68 extern struct rnh *zebra_add_rnh(struct prefix *p, vrf_id_t vrfid,
  69                                  rnh_type_t type);
  70 extern struct rnh *zebra_lookup_rnh(struct prefix *p, vrf_id_t vrfid,
  71                                     rnh_type_t type);
  72 extern void zebra_free_rnh(struct rnh *rnh);
  73 extern void zebra_delete_rnh(struct rnh *rnh, rnh_type_t type);
  74 extern void zebra_add_rnh_client(struct rnh *rnh, struct zserv *client,
  75                                  rnh_type_t type, vrf_id_t vrfid);
  76 extern void zebra_register_rnh_static_nh(vrf_id_t, struct prefix *,
  77                                          struct route_node *);
  78 extern void zebra_deregister_rnh_static_nexthops(vrf_id_t,
  79                                                  struct nexthop *nexthop,
  80                                                  struct route_node *rn);
  81 extern void zebra_deregister_rnh_static_nh(vrf_id_t, struct prefix *,
  82                                            struct route_node *);
  83 extern void zebra_register_rnh_pseudowire(vrf_id_t, struct zebra_pw *);
  84 extern void zebra_deregister_rnh_pseudowire(vrf_id_t, struct zebra_pw *);
  85 extern void zebra_remove_rnh_client(struct rnh *rnh, struct zserv *client,
  86                                     rnh_type_t type);
  87 extern void zebra_evaluate_rnh(vrf_id_t vrfid, int family, int force,
  88                                rnh_type_t type, struct prefix *p);
  89 extern void zebra_print_rnh_table(vrf_id_t vrfid, int family, struct vty *vty,
  90                                   rnh_type_t);
  91 extern char *rnh_str(struct rnh *rnh, char *buf, int size);
  92 #endif /*_ZEBRA_RNH_H */