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 || (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 /* BGP own address structure */
  70 struct bgp_addr {
  71         struct in_addr addr;
  72         int refcnt;
  73 };
  74
  75 /* Own tunnel-ip address structure */
  76 struct tip_addr {
  77         struct in_addr addr;
  78         int refcnt;
  79 };
  80
  81 extern int bgp_nexthop_lookup(afi_t, struct peer *peer, struct bgp_info *,
  82                               int *, int *);
  83 extern void bgp_connected_add(struct bgp *bgp, struct connected *c);
  84 extern void bgp_connected_delete(struct bgp *bgp, struct connected *c);
  85 extern int bgp_subgrp_multiaccess_check_v4(struct in_addr nexthop,
  86                                            struct update_subgroup *subgrp);
  87 extern int bgp_multiaccess_check_v4(struct in_addr, struct peer *);
  88 extern int bgp_config_write_scan_time(struct vty *);
  89 extern int bgp_nexthop_self(struct bgp *, struct in_addr);
  90 extern struct bgp_nexthop_cache *bnc_new(void);
  91 extern void bnc_free(struct bgp_nexthop_cache *bnc);
  92 extern void bnc_nexthop_free(struct bgp_nexthop_cache *bnc);
  93 extern char *bnc_str(struct bgp_nexthop_cache *bnc, char *buf, int size);
  94 extern void bgp_scan_init(struct bgp *bgp);
  95 extern void bgp_scan_finish(struct bgp *bgp);
  96 extern void bgp_scan_vty_init(void);
  97 extern void bgp_address_init(struct bgp *bgp);
  98 extern void bgp_address_destroy(struct bgp *bgp);
  99 extern void bgp_tip_add(struct bgp *bgp, struct in_addr *tip);
 100 extern void bgp_tip_del(struct bgp *bgp, struct in_addr *tip);
 101 extern void bgp_tip_hash_init(struct bgp *bgp);
 102 extern void bgp_tip_hash_destroy(struct bgp *bgp);
 103
 104 #endif /* _QUAGGA_BGP_NEXTHOP_H */