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
  17 along with GNU Zebra; see the file COPYING.  If not, write to the Free
  18 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.  */
  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 || (nexthop_len) == 12                            \
  30                   ? AF_INET                                                    \
  31                   : ((nexthop_len) == 16 || (nexthop_len) == 24                \
  32                                      || (nexthop_len) == 48                    \
  33                              ? AF_INET6                                        \
  34                              : AF_UNSPEC)))
  35
  36 #define BGP_MP_NEXTHOP_FAMILY NEXTHOP_FAMILY
  37
  38 /* BGP nexthop cache value structure. */
  39 struct bgp_nexthop_cache {
  40         /* IGP route's metric. */
  41         u_int32_t metric;
  42
  43         /* Nexthop number and nexthop linked list.*/
  44         u_char nexthop_num;
  45         struct nexthop *nexthop;
  46         time_t last_update;
  47         u_int16_t flags;
  48
  49 #define BGP_NEXTHOP_VALID             (1 << 0)
  50 #define BGP_NEXTHOP_REGISTERED        (1 << 1)
  51 #define BGP_NEXTHOP_CONNECTED         (1 << 2)
  52 #define BGP_NEXTHOP_PEER_NOTIFIED     (1 << 3)
  53 #define BGP_STATIC_ROUTE              (1 << 4)
  54 #define BGP_STATIC_ROUTE_EXACT_MATCH  (1 << 5)
  55
  56         u_int16_t change_flags;
  57
  58 #define BGP_NEXTHOP_CHANGED           (1 << 0)
  59 #define BGP_NEXTHOP_METRIC_CHANGED    (1 << 1)
  60 #define BGP_NEXTHOP_CONNECTED_CHANGED (1 << 2)
  61
  62         struct bgp_node *node;
  63         void *nht_info; /* In BGP, peer session */
  64         LIST_HEAD(path_list, bgp_info) paths;
  65         unsigned int path_count;
  66         struct bgp *bgp;
  67 };
  68
  69 extern int bgp_nexthop_lookup(afi_t, struct peer *peer, struct bgp_info *,
  70                               int *, int *);
  71 extern void bgp_connected_add(struct bgp *bgp, struct connected *c);
  72 extern void bgp_connected_delete(struct bgp *bgp, struct connected *c);
  73 extern int bgp_multiaccess_check_v4(struct in_addr, struct peer *);
  74 extern int bgp_config_write_scan_time(struct vty *);
  75 extern int bgp_nexthop_self(struct bgp *, struct attr *);
  76 extern struct bgp_nexthop_cache *bnc_new(void);
  77 extern void bnc_free(struct bgp_nexthop_cache *bnc);
  78 extern void bnc_nexthop_free(struct bgp_nexthop_cache *bnc);
  79 extern char *bnc_str(struct bgp_nexthop_cache *bnc, char *buf, int size);
  80 extern void bgp_scan_init(struct bgp *bgp);
  81 extern void bgp_scan_finish(struct bgp *bgp);
  82 extern void bgp_scan_vty_init(void);
  83 extern void bgp_address_init(struct bgp *bgp);
  84 extern void bgp_address_destroy(struct bgp *bgp);
  85
  86 #endif /* _QUAGGA_BGP_NEXTHOP_H */