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 #ifdef __cplusplus
  29 extern "C" {
  30 #endif
  31
  32 /* Nexthop structure. */
  33 struct rnh {
  34         uint8_t flags;
  35
  36 #define ZEBRA_NHT_CONNECTED     0x1
  37 #define ZEBRA_NHT_DELETED       0x2
  38 #define ZEBRA_NHT_EXACT_MATCH   0x4
  39
  40         /* VRF identifier. */
  41         vrf_id_t vrf_id;
  42
  43         struct route_entry *state;
  44         struct prefix resolved_route;
  45         struct list *client_list;
  46
  47         /* pseudowires dependent on this nh */
  48         struct list *zebra_pseudowire_list;
  49
  50         struct route_node *node;
  51
  52         /*
  53          * if this has been filtered for the client
  54          */
  55         int filtered[ZEBRA_ROUTE_MAX];
  56 };
  57
  58 typedef enum { RNH_NEXTHOP_TYPE, RNH_IMPORT_CHECK_TYPE } rnh_type_t;
  59
  60 extern int zebra_rnh_ip_default_route;
  61 extern int zebra_rnh_ipv6_default_route;
  62
  63 extern void zebra_rnh_init(void);
  64
  65 static inline int rnh_resolve_via_default(int family)
  66 {
  67         if (((family == AF_INET) && zebra_rnh_ip_default_route)
  68             || ((family == AF_INET6) && zebra_rnh_ipv6_default_route))
  69                 return 1;
  70         else
  71                 return 0;
  72 }
  73
  74 extern struct rnh *zebra_add_rnh(struct prefix *p, vrf_id_t vrfid,
  75                                  rnh_type_t type, bool *exists);
  76 extern struct rnh *zebra_lookup_rnh(struct prefix *p, vrf_id_t vrfid,
  77                                     rnh_type_t type);
  78 extern void zebra_free_rnh(struct rnh *rnh);
  79 extern void zebra_add_rnh_client(struct rnh *rnh, struct zserv *client,
  80                                  rnh_type_t type, vrf_id_t vrfid);
  81 extern void zebra_register_rnh_pseudowire(vrf_id_t, struct zebra_pw *);
  82 extern void zebra_deregister_rnh_pseudowire(vrf_id_t, struct zebra_pw *);
  83 extern void zebra_remove_rnh_client(struct rnh *rnh, struct zserv *client,
  84                                     rnh_type_t type);
  85 extern void zebra_evaluate_rnh(struct zebra_vrf *zvrf, afi_t afi, int force,
  86                                rnh_type_t type, struct prefix *p);
  87 extern void zebra_print_rnh_table(vrf_id_t vrfid, afi_t afi, struct vty *vty,
  88                                   rnh_type_t);
  89 extern char *rnh_str(struct rnh *rnh, char *buf, int size);
  90
  91 #ifdef __cplusplus
  92 }
  93 #endif
  94
  95 #endif /*_ZEBRA_RNH_H */