ospf6d/ospf6_area.c

   1 /*
   2  * OSPF6 Area Data Structure
   3  * Copyright (C) 1999-2002 Yasuhiro Ohara
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with GNU Zebra; see the file COPYING.  If not, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22
  23 #include "ospf6d.h"
  24
  25 static int area_index;
  26 #define IS_OSPF6_DUMP_AREA (ospf6_dump_is_on (area_index))
  27
  28 static void
  29 ospf6_area_foreach_interface (struct ospf6_area *o6a, void *arg, int val,
  30                               void (*func) (void *, int, void *))
  31 {
  32   listnode node;
  33   struct ospf6_interface *o6i;
  34
  35   for (node = listhead (o6a->if_list); node; nextnode (node))
  36     {
  37       o6i = (struct ospf6_interface *) getdata (node);
  38       (*func) (arg, val, o6i);
  39     }
  40 }
  41
  42 static void
  43 ospf6_area_foreach_neighbor (struct ospf6_area *o6a, void *arg, int val,
  44                              void (*func) (void *, int, void *))
  45 {
  46   listnode node;
  47   struct ospf6_interface *o6i;
  48
  49   for (node = listhead (o6a->if_list); node; nextnode (node))
  50     {
  51       o6i = (struct ospf6_interface *) getdata (node);
  52       (*o6i->foreach_nei) (o6i, arg, val, func);
  53     }
  54 }
  55
  56 static int
  57 ospf6_area_maxage_remover (struct thread *t)
  58 {
  59   int count;
  60   struct ospf6_area *o6a = (struct ospf6_area *) THREAD_ARG (t);
  61
  62   o6a->maxage_remover = (struct thread *) NULL;
  63
  64   count = 0;
  65   o6a->foreach_nei (o6a, &count, NBS_EXCHANGE, ospf6_count_state);
  66   o6a->foreach_nei (o6a, &count, NBS_LOADING, ospf6_count_state);
  67   if (count != 0)
  68     return 0;
  69
  70   ospf6_lsdb_remove_maxage (o6a->lsdb);
  71   return 0;
  72 }
  73
  74 void
  75 ospf6_area_schedule_maxage_remover (void *arg, int val, void *obj)
  76 {
  77   struct ospf6_area *o6a = (struct ospf6_area *) obj;
  78
  79   if (o6a->maxage_remover != NULL)
  80     return;
  81
  82   o6a->maxage_remover =
  83     thread_add_event (master, ospf6_area_maxage_remover, o6a, 0);
  84 }
  85
  86 int
  87 ospf6_area_is_stub (struct ospf6_area *o6a)
  88 {
  89   if (OSPF6_OPT_ISSET (o6a->options, OSPF6_OPT_E))
  90     return 0;
  91   return 1;
  92 }
  93
  94 int
  95 ospf6_area_is_transit (struct ospf6_area *o6a)
  96 {
  97   return 0;
  98 }
  99
 100 \f
 101
 102 void
 103 ospf6_area_route_add (void *data)
 104 {
 105   struct ospf6_route_req *route = data;
 106   struct in6_addr local;
 107
 108   inet_pton (AF_INET6, "::1", &local);
 109   if (! memcmp (&route->nexthop.address, &local, sizeof (struct in6_addr)))
 110     {
 111       if (IS_OSPF6_DUMP_AREA)
 112         zlog_info ("AREA: Self-originated route add, ignore");
 113       return;
 114     }
 115
 116   ospf6_route_add (route, ospf6->route_table);
 117 }
 118
 119 void
 120 ospf6_area_route_remove (void *data)
 121 {
 122   struct ospf6_route_req *route = data;
 123   struct in6_addr local;
 124
 125   inet_pton (AF_INET6, "::1", &local);
 126   if (! memcmp (&route->nexthop.address, &local, sizeof (struct in6_addr)))
 127     {
 128       if (IS_OSPF6_DUMP_AREA)
 129         zlog_info ("AREA: Self-originated route remove, ignore");
 130       return;
 131     }
 132
 133   ospf6_route_remove (route, ospf6->route_table);
 134 }
 135
 136 /* Make new area structure */
 137 struct ospf6_area *
 138 ospf6_area_create (u_int32_t area_id)
 139 {
 140   struct ospf6_area *o6a;
 141   char namebuf[64];
 142
 143   /* allocate memory */
 144   o6a = XCALLOC (MTYPE_OSPF6_AREA, sizeof (struct ospf6_area));
 145
 146   /* initialize */
 147   inet_ntop (AF_INET, &area_id, o6a->str, sizeof (o6a->str));
 148   o6a->area_id = area_id;
 149   o6a->if_list = list_new ();
 150
 151   o6a->lsdb = ospf6_lsdb_create ();
 152   o6a->spf_tree = ospf6_spftree_create ();
 153
 154   snprintf (namebuf, sizeof (namebuf), "Area %s's route table", o6a->str);
 155   o6a->route_table = ospf6_route_table_create (namebuf);
 156   o6a->route_table->hook_add = ospf6_area_route_add;
 157   o6a->route_table->hook_change = ospf6_area_route_add;
 158   o6a->route_table->hook_remove = ospf6_area_route_remove;
 159
 160   snprintf (namebuf, sizeof (namebuf), "Area %s's topology table", o6a->str);
 161   o6a->table_topology = ospf6_route_table_create (namebuf);
 162   o6a->table_topology->hook_add = ospf6_intra_topology_add;
 163   o6a->table_topology->hook_change = ospf6_intra_topology_add;
 164   o6a->table_topology->hook_remove = ospf6_intra_topology_remove;
 165
 166   /* xxx, set options */
 167   OSPF6_OPT_SET (o6a->options, OSPF6_OPT_V6);
 168   OSPF6_OPT_SET (o6a->options, OSPF6_OPT_E);
 169   OSPF6_OPT_SET (o6a->options, OSPF6_OPT_R);
 170
 171   o6a->foreach_if = ospf6_area_foreach_interface;
 172   o6a->foreach_nei = ospf6_area_foreach_neighbor;
 173
 174   return o6a;
 175 }
 176
 177 void
 178 ospf6_area_bind_top (struct ospf6_area *o6a, struct ospf6 *o6)
 179 {
 180   o6a->ospf6 = o6;
 181   CALL_CHANGE_HOOK (&area_hook, o6a);
 182   return;
 183 }
 184
 185 void
 186 ospf6_area_delete (struct ospf6_area *o6a)
 187 {
 188   listnode n;
 189   struct ospf6_interface *o6i;
 190
 191   CALL_REMOVE_HOOK (&area_hook, o6a);
 192
 193   /* ospf6 interface list */
 194   for (n = listhead (o6a->if_list); n; nextnode (n))
 195     {
 196       o6i = (struct ospf6_interface *) getdata (n);
 197       /* ospf6_interface_delete (o6i); */
 198     }
 199   list_delete (o6a->if_list);
 200
 201   /* terminate LSDB */
 202   ospf6_lsdb_remove_all (o6a->lsdb);
 203
 204   /* spf tree terminate */
 205   /* xxx */
 206
 207   /* threads */
 208   if (o6a->spf_calc)
 209     thread_cancel (o6a->spf_calc);
 210   o6a->spf_calc = (struct thread *) NULL;
 211   if (o6a->route_calc)
 212     thread_cancel (o6a->route_calc);
 213   o6a->route_calc = (struct thread *) NULL;
 214
 215   /* new */
 216   ospf6_route_table_delete (o6a->route_table);
 217
 218   ospf6_spftree_delete (o6a->spf_tree);
 219   ospf6_route_table_delete (o6a->table_topology);
 220
 221   /* free area */
 222   XFREE (MTYPE_OSPF6_AREA, o6a);
 223 }
 224
 225 struct ospf6_area *
 226 ospf6_area_lookup (u_int32_t area_id, struct ospf6 *o6)
 227 {
 228   struct ospf6_area *o6a;
 229   listnode n;
 230
 231   for (n = listhead (o6->area_list); n; nextnode (n))
 232     {
 233       o6a = (struct ospf6_area *) getdata (n);
 234       if (o6a->area_id == area_id)
 235         return o6a;
 236     }
 237
 238   return (struct ospf6_area *) NULL;
 239 }
 240
 241 void
 242 ospf6_area_show (struct vty *vty, struct ospf6_area *o6a)
 243 {
 244   listnode i;
 245   struct ospf6_interface *o6i;
 246
 247   vty_out (vty, " Area %s%s", o6a->str, VTY_NEWLINE);
 248   vty_out (vty, "     Number of Area scoped LSAs is %u%s",
 249            o6a->lsdb->count, VTY_NEWLINE);
 250
 251   ospf6_spf_statistics_show (vty, o6a->spf_tree);
 252
 253   vty_out (vty, "     Interface attached to this area:");
 254   for (i = listhead (o6a->if_list); i; nextnode (i))
 255     {
 256       o6i = (struct ospf6_interface *) getdata (i);
 257       vty_out (vty, " %s", o6i->interface->name);
 258     }
 259   vty_out (vty, "%s", VTY_NEWLINE);
 260
 261   for (i = listhead (o6a->if_list); i; nextnode (i))
 262     {
 263       o6i = (struct ospf6_interface *) getdata (i);
 264       if (listcount (o6i->neighbor_list) != 0)
 265         ospf6_interface_statistics_show (vty, o6i);
 266     }
 267 }
 268
 269 void
 270 ospf6_area_statistics_show (struct vty *vty, struct ospf6_area *o6a)
 271 {
 272 #if 0
 273   listnode node;
 274   struct ospf6_interface *o6i;
 275
 276   vty_out (vty, "  Statistics of Area %s%s", o6a->str, VTY_NEWLINE);
 277 #endif
 278 }
 279
 280 DEFUN (show_ipv6_ospf6_area_route,
 281        show_ipv6_ospf6_area_route_cmd,
 282        "show ipv6 ospf6 area A.B.C.D route",
 283        SHOW_STR
 284        IP6_STR
 285        OSPF6_STR
 286        OSPF6_AREA_STR
 287        OSPF6_AREA_ID_STR
 288        ROUTE_STR
 289        )
 290 {
 291   struct ospf6_area *o6a;
 292   u_int32_t area_id;
 293
 294   OSPF6_CMD_CHECK_RUNNING ();
 295
 296   inet_pton (AF_INET, argv[0], &area_id);
 297   o6a = ospf6_area_lookup (area_id, ospf6);
 298
 299   if (! o6a)
 300     return CMD_SUCCESS;
 301
 302   argc -= 1;
 303   argv += 1;
 304
 305   return ospf6_route_table_show (vty, argc, argv, o6a->route_table);
 306 }
 307
 308 ALIAS (show_ipv6_ospf6_area_route,
 309        show_ipv6_ospf6_area_route_prefix_cmd,
 310        "show ipv6 ospf6 area A.B.C.D route (X::X|detail)",
 311        SHOW_STR
 312        IP6_STR
 313        OSPF6_STR
 314        OSPF6_AREA_STR
 315        OSPF6_AREA_ID_STR
 316        ROUTE_STR
 317        "Specify IPv6 address\n"
 318        "Detailed information\n"
 319        )
 320
 321 void
 322 ospf6_area_init ()
 323 {
 324   area_index = ospf6_dump_install ("area", "Area information\n");
 325
 326   install_element (VIEW_NODE, &show_ipv6_ospf6_area_route_cmd);
 327   install_element (VIEW_NODE, &show_ipv6_ospf6_area_route_prefix_cmd);
 328   install_element (ENABLE_NODE, &show_ipv6_ospf6_area_route_cmd);
 329   install_element (ENABLE_NODE, &show_ipv6_ospf6_area_route_prefix_cmd);
 330 }
 331
 332