release/src/router/zebra/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_int16_t 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 #define BGP_INFO_STALE          (1 << 8)
  49
  50   /* Peer structure.  */
  51   struct peer *peer;
  52
  53   /* Attribute structure.  */
  54   struct attr *attr;
  55
  56   /* This route is suppressed with aggregation.  */
  57   int suppress;
  58
  59   /* Nexthop reachability check.  */
  60   u_int32_t igpmetric;
  61
  62   /* Uptime.  */
  63   time_t uptime;
  64
  65   /* Pointer to dampening structure.  */
  66   struct bgp_damp_info *damp_info;
  67
  68   /* MPLS label.  */
  69   u_char tag[3];
  70 };
  71
  72 /* BGP static route configuration. */
  73 struct bgp_static
  74 {
  75   /* Backdoor configuration.  */
  76   int backdoor;
  77
  78   /* Import check status.  */
  79   u_char valid;
  80
  81   /* IGP metric. */
  82   u_int32_t igpmetric;
  83
  84   /* IGP nexthop. */
  85   struct in_addr igpnexthop;
  86
  87   /* BGP redistribute route-map.  */
  88   struct
  89   {
  90     char *name;
  91     struct route_map *map;
  92   } rmap;
  93
  94   /* MPLS label.  */
  95   u_char tag[3];
  96 };
  97
  98 #define DISTRIBUTE_IN_NAME(F)   ((F)->dlist[FILTER_IN].name)
  99 #define DISTRIBUTE_IN(F)        ((F)->dlist[FILTER_IN].alist)
 100 #define DISTRIBUTE_OUT_NAME(F)  ((F)->dlist[FILTER_OUT].name)
 101 #define DISTRIBUTE_OUT(F)       ((F)->dlist[FILTER_OUT].alist)
 102
 103 #define PREFIX_LIST_IN_NAME(F)  ((F)->plist[FILTER_IN].name)
 104 #define PREFIX_LIST_IN(F)       ((F)->plist[FILTER_IN].plist)
 105 #define PREFIX_LIST_OUT_NAME(F) ((F)->plist[FILTER_OUT].name)
 106 #define PREFIX_LIST_OUT(F)      ((F)->plist[FILTER_OUT].plist)
 107
 108 #define FILTER_LIST_IN_NAME(F)  ((F)->aslist[FILTER_IN].name)
 109 #define FILTER_LIST_IN(F)       ((F)->aslist[FILTER_IN].aslist)
 110 #define FILTER_LIST_OUT_NAME(F) ((F)->aslist[FILTER_OUT].name)
 111 #define FILTER_LIST_OUT(F)      ((F)->aslist[FILTER_OUT].aslist)
 112
 113 #define ROUTE_MAP_IN_NAME(F)    ((F)->map[FILTER_IN].name)
 114 #define ROUTE_MAP_IN(F)         ((F)->map[FILTER_IN].map)
 115 #define ROUTE_MAP_OUT_NAME(F)   ((F)->map[FILTER_OUT].name)
 116 #define ROUTE_MAP_OUT(F)        ((F)->map[FILTER_OUT].map)
 117
 118 #define UNSUPPRESS_MAP_NAME(F)  ((F)->usmap.name)
 119 #define UNSUPPRESS_MAP(F)       ((F)->usmap.map)
 120
 121 /* Prototypes. */
 122 void bgp_route_init ();
 123 void bgp_announce_route (struct peer *, afi_t, safi_t);
 124 void bgp_announce_route_all (struct peer *);
 125 void bgp_default_originate (struct peer *, afi_t, safi_t, int);
 126 void bgp_soft_reconfig_in (struct peer *, afi_t, safi_t);
 127 void bgp_clear_route (struct peer *, afi_t, safi_t);
 128 void bgp_clear_route_all (struct peer *);
 129 void bgp_clear_adj_in (struct peer *, afi_t, safi_t);
 130 void bgp_clear_stale_route (struct peer *, afi_t, safi_t);
 131
 132 int bgp_nlri_sanity_check (struct peer *, int, u_char *, bgp_size_t);
 133 int bgp_nlri_parse (struct peer *, struct attr *, struct bgp_nlri *);
 134
 135 int bgp_maximum_prefix_overflow (struct peer *, afi_t, safi_t, int);
 136
 137 void bgp_redistribute_add (struct prefix *, struct in_addr *, u_int32_t, u_char);
 138 void bgp_redistribute_delete (struct prefix *, u_char);
 139 void bgp_redistribute_withdraw (struct bgp *, afi_t, int);
 140
 141 void bgp_static_delete (struct bgp *);
 142 void bgp_static_update (struct bgp *, struct prefix *, struct bgp_static *,
 143                         afi_t, safi_t);
 144 void bgp_static_withdraw (struct bgp *, struct prefix *, afi_t, safi_t);
 145
 146 int bgp_static_set_vpnv4 (struct vty *vty, char *, char *, char *);
 147
 148 int bgp_static_unset_vpnv4 (struct vty *, char *, char *, char *);
 149
 150 int bgp_config_write_network (struct vty *, struct bgp *, afi_t, safi_t, int *);
 151 int bgp_config_write_distance (struct vty *, struct bgp *);
 152
 153 void bgp_aggregate_increment (struct bgp *, struct prefix *, struct bgp_info *,
 154                               afi_t, safi_t);
 155 void bgp_aggregate_decrement (struct bgp *, struct prefix *, struct bgp_info *,
 156                               afi_t, safi_t);
 157
 158 u_char bgp_distance_apply (struct prefix *, struct bgp_info *, struct bgp *);
 159
 160 afi_t bgp_node_afi (struct vty *);
 161 safi_t bgp_node_safi (struct vty *);