bgpd/bgp_nexthop.h

   1 /* BGP nexthop scan
   2  * Copyright (C) 2000 Kunihiro Ishiguro
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra 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 along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef _QUAGGA_BGP_NEXTHOP_H
  22 #define _QUAGGA_BGP_NEXTHOP_H
  23
  24 #include "if.h"
  25 #include "queue.h"
  26 #include "prefix.h"
  27
  28 #define NEXTHOP_FAMILY(nexthop_len) ( \
  29   ((nexthop_len) ==  4 ||             \
  30    (nexthop_len) == 12 ? AF_INET :    \
  31   ((nexthop_len) == 16 ||             \
  32    (nexthop_len) == 24 ||             \
  33    (nexthop_len) == 48 ? AF_INET6 :   \
  34   AF_UNSPEC))                         \
  35 )
  36
  37 #define BGP_MP_NEXTHOP_FAMILY NEXTHOP_FAMILY
  38
  39 /* BGP nexthop cache value structure. */
  40 struct bgp_nexthop_cache
  41 {
  42   /* IGP route's metric. */
  43   u_int32_t metric;
  44
  45   /* Nexthop number and nexthop linked list.*/
  46   u_char nexthop_num;
  47   struct nexthop *nexthop;
  48   time_t last_update;
  49   u_int16_t flags;
  50
  51 #define BGP_NEXTHOP_VALID             (1 << 0)
  52 #define BGP_NEXTHOP_REGISTERED        (1 << 1)
  53 #define BGP_NEXTHOP_CONNECTED         (1 << 2)
  54 #define BGP_NEXTHOP_PEER_NOTIFIED     (1 << 3)
  55 #define BGP_STATIC_ROUTE              (1 << 4)
  56 #define BGP_STATIC_ROUTE_EXACT_MATCH  (1 << 5)
  57
  58   u_int16_t change_flags;
  59
  60 #define BGP_NEXTHOP_CHANGED           (1 << 0)
  61 #define BGP_NEXTHOP_METRIC_CHANGED    (1 << 1)
  62 #define BGP_NEXTHOP_CONNECTED_CHANGED (1 << 2)
  63
  64   struct bgp_node *node;
  65   void *nht_info;               /* In BGP, peer session */
  66   LIST_HEAD(path_list, bgp_info) paths;
  67   unsigned int path_count;
  68   struct bgp *bgp;
  69 };
  70
  71 extern int bgp_nexthop_lookup (afi_t, struct peer *peer, struct bgp_info *,
  72                         int *, int *);
  73 extern void bgp_connected_add (struct bgp *bgp, struct connected *c);
  74 extern void bgp_connected_delete (struct bgp *bgp, struct connected *c);
  75 extern int bgp_multiaccess_check_v4 (struct in_addr, struct peer *);
  76 extern int bgp_config_write_scan_time (struct vty *);
  77 extern int bgp_nexthop_self (struct bgp *, struct attr *);
  78 extern struct bgp_nexthop_cache *bnc_new(void);
  79 extern void bnc_free(struct bgp_nexthop_cache *bnc);
  80 extern void bnc_nexthop_free(struct bgp_nexthop_cache *bnc);
  81 extern char *bnc_str(struct bgp_nexthop_cache *bnc, char *buf, int size);
  82 extern void bgp_scan_init(struct bgp *bgp);
  83 extern void bgp_scan_finish(struct bgp *bgp);
  84 extern void bgp_scan_vty_init(void);
  85 extern void bgp_address_init (struct bgp *bgp);
  86 extern void bgp_address_destroy (struct bgp *bgp);
  87
  88 #endif /* _QUAGGA_BGP_NEXTHOP_H */