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 typedef enum { RNH_NEXTHOP_TYPE, RNH_IMPORT_CHECK_TYPE } rnh_type_t;
  33
  34 /* Nexthop structure. */
  35 struct rnh {
  36         uint8_t flags;
  37
  38 #define ZEBRA_NHT_CONNECTED     0x1
  39 #define ZEBRA_NHT_DELETED       0x2
  40 #define ZEBRA_NHT_EXACT_MATCH   0x4
  41
  42         /* VRF identifier. */
  43         vrf_id_t vrf_id;
  44
  45         afi_t afi;
  46
  47         rnh_type_t type;
  48
  49         uint32_t seqno;
  50
  51         struct route_entry *state;
  52         struct prefix resolved_route;
  53         struct list *client_list;
  54
  55         /* pseudowires dependent on this nh */
  56         struct list *zebra_pseudowire_list;
  57
  58         struct route_node *node;
  59
  60         /*
  61          * if this has been filtered for the client
  62          */
  63         int filtered[ZEBRA_ROUTE_MAX];
  64 };
  65
  66 extern int zebra_rnh_ip_default_route;
  67 extern int zebra_rnh_ipv6_default_route;
  68
  69 extern void zebra_rnh_init(void);
  70
  71 static inline int rnh_resolve_via_default(int family)
  72 {
  73         if (((family == AF_INET) && zebra_rnh_ip_default_route)
  74             || ((family == AF_INET6) && zebra_rnh_ipv6_default_route))
  75                 return 1;
  76         else
  77                 return 0;
  78 }
  79
  80 extern struct rnh *zebra_add_rnh(struct prefix *p, vrf_id_t vrfid,
  81                                  rnh_type_t type, bool *exists);
  82 extern struct rnh *zebra_lookup_rnh(struct prefix *p, vrf_id_t vrfid,
  83                                     rnh_type_t type);
  84 extern void zebra_free_rnh(struct rnh *rnh);
  85 extern void zebra_add_rnh_client(struct rnh *rnh, struct zserv *client,
  86                                  rnh_type_t type, vrf_id_t vrfid);
  87 extern void zebra_register_rnh_pseudowire(vrf_id_t, struct zebra_pw *);
  88 extern void zebra_deregister_rnh_pseudowire(vrf_id_t, struct zebra_pw *);
  89 extern void zebra_remove_rnh_client(struct rnh *rnh, struct zserv *client,
  90                                     rnh_type_t type);
  91 extern void zebra_evaluate_rnh(struct zebra_vrf *zvrf, afi_t afi, int force,
  92                                rnh_type_t type, struct prefix *p);
  93 extern void zebra_print_rnh_table(vrf_id_t vrfid, afi_t afi, struct vty *vty,
  94                                   rnh_type_t type, struct prefix *p);
  95 extern char *rnh_str(struct rnh *rnh, char *buf, int size);
  96
  97 #ifdef __cplusplus
  98 }
  99 #endif
 100
 101 #endif /*_ZEBRA_RNH_H */