bgpd/bgp_route.h

   1 /* BGP routing information base
   2    Copyright (C) 1996, 97, 98, 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 struct bgp_info
  22 {
  23   /* For linked list. */
  24   struct bgp_info *next;
  25   struct bgp_info *prev;
  26
  27   /* BGP route type.  This can be static, RIP, OSPF, BGP etc.  */
  28   u_char type;
  29
  30   /* When above type is BGP.  This sub type specify BGP sub type
  31      information.  */
  32   u_char sub_type;
  33 #define BGP_ROUTE_NORMAL       0
  34 #define BGP_ROUTE_STATIC       1
  35 #define BGP_ROUTE_AGGREGATE    2
  36 #define BGP_ROUTE_REDISTRIBUTE 3
  37
  38   /* BGP information status.  */
  39   u_char flags;
  40 #define BGP_INFO_IGP_CHANGED    (1 << 0)
  41 #define BGP_INFO_DAMPED         (1 << 1)
  42 #define BGP_INFO_HISTORY        (1 << 2)
  43 #define BGP_INFO_SELECTED       (1 << 3)
  44 #define BGP_INFO_VALID          (1 << 4)
  45 #define BGP_INFO_ATTR_CHANGED   (1 << 5)
  46 #define BGP_INFO_DMED_CHECK     (1 << 6)
  47 #define BGP_INFO_DMED_SELECTED  (1 << 7)
  48
  49   /* Peer structure.  */
  50   struct peer *peer;
  51
  52   /* Attribute structure.  */
  53   struct attr *attr;
  54
  55   /* This route is suppressed with aggregation.  */
  56   int suppress;
  57
  58   /* Nexthop reachability check.  */
  59   u_int32_t igpmetric;
  60
  61   /* Uptime.  */
  62   time_t uptime;
  63
  64   /* Pointer to dampening structure.  */
  65   struct bgp_damp_info *damp_info;
  66
  67   /* MPLS label.  */
  68   u_char tag[3];
  69 };
  70
  71 /* BGP static route configuration. */
  72 struct bgp_static
  73 {
  74   /* Backdoor configuration.  */
  75   int backdoor;
  76
  77   /* Import check status.  */
  78   u_char valid;
  79
  80   /* IGP metric. */
  81   u_int32_t igpmetric;
  82
  83   /* IGP nexthop. */
  84   struct in_addr igpnexthop;
  85
  86   /* BGP redistribute route-map.  */
  87   struct
  88   {
  89     char *name;
  90     struct route_map *map;
  91   } rmap;
  92
  93   /* MPLS label.  */
  94   u_char tag[3];
  95 };
  96
  97 #define DISTRIBUTE_IN_NAME(F)   ((F)->dlist[FILTER_IN].name)
  98 #define DISTRIBUTE_IN(F)        ((F)->dlist[FILTER_IN].alist)
  99 #define DISTRIBUTE_OUT_NAME(F)  ((F)->dlist[FILTER_OUT].name)
 100 #define DISTRIBUTE_OUT(F)       ((F)->dlist[FILTER_OUT].alist)
 101
 102 #define PREFIX_LIST_IN_NAME(F)  ((F)->plist[FILTER_IN].name)
 103 #define PREFIX_LIST_IN(F)       ((F)->plist[FILTER_IN].plist)
 104 #define PREFIX_LIST_OUT_NAME(F) ((F)->plist[FILTER_OUT].name)
 105 #define PREFIX_LIST_OUT(F)      ((F)->plist[FILTER_OUT].plist)
 106
 107 #define FILTER_LIST_IN_NAME(F)  ((F)->aslist[FILTER_IN].name)
 108 #define FILTER_LIST_IN(F)       ((F)->aslist[FILTER_IN].aslist)
 109 #define FILTER_LIST_OUT_NAME(F) ((F)->aslist[FILTER_OUT].name)
 110 #define FILTER_LIST_OUT(F)      ((F)->aslist[FILTER_OUT].aslist)
 111
 112 #define ROUTE_MAP_IN_NAME(F)    ((F)->map[RMAP_IN].name)
 113 #define ROUTE_MAP_IN(F)         ((F)->map[RMAP_IN].map)
 114 #define ROUTE_MAP_OUT_NAME(F)   ((F)->map[RMAP_OUT].name)
 115 #define ROUTE_MAP_OUT(F)        ((F)->map[RMAP_OUT].map)
 116
 117 #define ROUTE_MAP_IMPORT_NAME(F)    ((F)->map[RMAP_IMPORT].name)
 118 #define ROUTE_MAP_IMPORT(F)    ((F)->map[RMAP_IMPORT].map)
 119 #define ROUTE_MAP_EXPORT_NAME(F)    ((F)->map[RMAP_EXPORT].name)
 120 #define ROUTE_MAP_EXPORT(F)    ((F)->map[RMAP_EXPORT].map)
 121
 122 #define UNSUPPRESS_MAP_NAME(F)  ((F)->usmap.name)
 123 #define UNSUPPRESS_MAP(F)       ((F)->usmap.map)
 124
 125 /* Prototypes. */
 126 void bgp_route_init ();
 127 void bgp_cleanup_routes (void);
 128 void bgp_announce_route (struct peer *, afi_t, safi_t);
 129 void bgp_announce_route_all (struct peer *);
 130 void bgp_default_originate (struct peer *, afi_t, safi_t, int);
 131 void bgp_soft_reconfig_in (struct peer *, afi_t, safi_t);
 132 void bgp_soft_reconfig_rsclient (struct peer *, afi_t, safi_t);
 133 void bgp_check_local_routes_rsclient (struct peer *rsclient, afi_t afi, safi_t safi);
 134 void bgp_clear_route (struct peer *, afi_t, safi_t);
 135 void bgp_clear_route_all (struct peer *);
 136 void bgp_clear_adj_in (struct peer *, afi_t, safi_t);
 137
 138 int bgp_nlri_sanity_check (struct peer *, int, u_char *, bgp_size_t);
 139 int bgp_nlri_parse (struct peer *, struct attr *, struct bgp_nlri *);
 140
 141 int bgp_maximum_prefix_overflow (struct peer *, afi_t, safi_t, int);
 142
 143 void bgp_redistribute_add (struct prefix *, struct in_addr *, u_int32_t, u_char);
 144 void bgp_redistribute_delete (struct prefix *, u_char);
 145 void bgp_redistribute_withdraw (struct bgp *, afi_t, int);
 146
 147 void bgp_static_delete (struct bgp *);
 148 void bgp_static_update (struct bgp *, struct prefix *, struct bgp_static *,
 149                         afi_t, safi_t);
 150 void bgp_static_withdraw (struct bgp *, struct prefix *, afi_t, safi_t);
 151
 152 int bgp_static_set_vpnv4 (struct vty *vty, const char *,
 153                           const char *, const char *);
 154
 155 int bgp_static_unset_vpnv4 (struct vty *, const char *,
 156                             const char *, const char *);
 157
 158 int bgp_config_write_network (struct vty *, struct bgp *, afi_t, safi_t, int *);
 159 int bgp_config_write_distance (struct vty *, struct bgp *);
 160
 161 void bgp_aggregate_increment (struct bgp *, struct prefix *, struct bgp_info *,
 162                               afi_t, safi_t);
 163 void bgp_aggregate_decrement (struct bgp *, struct prefix *, struct bgp_info *,
 164                               afi_t, safi_t);
 165
 166 u_char bgp_distance_apply (struct prefix *, struct bgp_info *, struct bgp *);
 167
 168 afi_t bgp_node_afi (struct vty *);
 169 safi_t bgp_node_safi (struct vty *);