release/src/router/zebra/ospf6d/ospf6_area.c

   1 /*
   2  * OSPF6 Area Data Structure
   3  * Copyright (C) 1999 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 void
  26 ospf6_area_foreach_interface (struct ospf6_area *o6a, void *arg, int val,
  27                               void (*func) (void *, int, void *))
  28 {
  29   listnode node;
  30   struct ospf6_interface *o6i;
  31
  32   for (node = listhead (o6a->if_list); node; nextnode (node))
  33     {
  34       o6i = (struct ospf6_interface *) getdata (node);
  35       (*func) (arg, val, o6i);
  36     }
  37 }
  38
  39 static void
  40 ospf6_area_foreach_neighbor (struct ospf6_area *o6a, void *arg, int val,
  41                              void (*func) (void *, int, void *))
  42 {
  43   listnode node;
  44   struct ospf6_interface *o6i;
  45
  46   for (node = listhead (o6a->if_list); node; nextnode (node))
  47     {
  48       o6i = (struct ospf6_interface *) getdata (node);
  49       (*o6i->foreach_nei) (o6i, arg, val, func);
  50     }
  51 }
  52
  53 static int
  54 ospf6_area_maxage_remover (struct thread *t)
  55 {
  56   int count;
  57   struct ospf6_area *o6a = (struct ospf6_area *) THREAD_ARG (t);
  58
  59   o6a->maxage_remover = (struct thread *) NULL;
  60
  61   count = 0;
  62   o6a->foreach_nei (o6a, &count, NBS_EXCHANGE, ospf6_count_state);
  63   o6a->foreach_nei (o6a, &count, NBS_LOADING, ospf6_count_state);
  64   if (count != 0)
  65     return 0;
  66
  67   ospf6_lsdb_remove_maxage (o6a->lsdb);
  68   return 0;
  69 }
  70
  71 void
  72 ospf6_area_schedule_maxage_remover (void *arg, int val, void *obj)
  73 {
  74   struct ospf6_area *o6a = (struct ospf6_area *) obj;
  75
  76   if (o6a->maxage_remover != NULL)
  77     return;
  78
  79   o6a->maxage_remover =
  80     thread_add_event (master, ospf6_area_maxage_remover, o6a, 0);
  81 }
  82
  83 int
  84 ospf6_area_is_stub (struct ospf6_area *o6a)
  85 {
  86   if (OSPF6_OPT_ISSET (o6a->options, OSPF6_OPT_E))
  87     return 0;
  88   return 1;
  89 }
  90
  91 int
  92 ospf6_area_is_transit (struct ospf6_area *o6a)
  93 {
  94   return 0;
  95 }
  96
  97 /* Make new area structure */
  98 struct ospf6_area *
  99 ospf6_area_create (u_int32_t area_id)
 100 {
 101   struct ospf6_area *o6a;
 102
 103   /* allocate memory */
 104   o6a = (struct ospf6_area *) XMALLOC (MTYPE_OSPF6_AREA,
 105                                        sizeof (struct ospf6_area));
 106   if (!o6a)
 107     {
 108       char str[16];
 109       inet_ntop (AF_INET, &area_id, str, sizeof (str));
 110       zlog_err ("can't allocate memory for Area %s", str);
 111       return NULL;
 112     }
 113
 114   /* initialize */
 115   memset (o6a, 0, sizeof (struct ospf6_area));
 116   inet_ntop (AF_INET, &area_id, o6a->str, sizeof (o6a->str));
 117   o6a->area_id = area_id;
 118   o6a->if_list = list_new ();
 119
 120 #if 0
 121   o6a->lsdb = list_new ();
 122 #endif
 123   o6a->lsdb = ospf6_lsdb_create ();
 124
 125   o6a->spf_tree = ospf6_spftree_create ();
 126   o6a->table_topology = route_table_init ();
 127
 128   /* xxx, set options */
 129   OSPF6_OPT_SET (o6a->options, OSPF6_OPT_V6);
 130   OSPF6_OPT_SET (o6a->options, OSPF6_OPT_E);
 131   OSPF6_OPT_SET (o6a->options, OSPF6_OPT_R);
 132
 133   o6a->foreach_if = ospf6_area_foreach_interface;
 134   o6a->foreach_nei = ospf6_area_foreach_neighbor;
 135
 136   return o6a;
 137 }
 138
 139 void
 140 ospf6_area_delete (struct ospf6_area *o6a)
 141 {
 142   listnode n;
 143   struct ospf6_interface *o6i;
 144
 145   /* ospf6 interface list */
 146   for (n = listhead (o6a->if_list); n; nextnode (n))
 147     {
 148       o6i = (struct ospf6_interface *) getdata (n);
 149       /* ospf6_interface_delete (o6i); */
 150     }
 151   list_delete (o6a->if_list);
 152
 153   /* terminate LSDB */
 154   ospf6_lsdb_remove_all (o6a->lsdb);
 155
 156   /* spf tree terminate */
 157   /* xxx */
 158
 159   /* threads */
 160   if (o6a->spf_calc)
 161     thread_cancel (o6a->spf_calc);
 162   o6a->spf_calc = (struct thread *) NULL;
 163   if (o6a->route_calc)
 164     thread_cancel (o6a->route_calc);
 165   o6a->route_calc = (struct thread *) NULL;
 166
 167   /* new */
 168   ospf6_spftree_delete (o6a->spf_tree);
 169   ospf6_route_delete_all (o6a->table_topology);
 170   route_table_finish (o6a->table_topology);
 171
 172   /* free area */
 173   XFREE (MTYPE_OSPF6_AREA, o6a);
 174 }
 175
 176 struct ospf6_area *
 177 ospf6_area_lookup (u_int32_t area_id, struct ospf6 *o6)
 178 {
 179   struct ospf6_area *o6a;
 180   listnode n;
 181
 182   for (n = listhead (o6->area_list); n; nextnode (n))
 183     {
 184       o6a = (struct ospf6_area *) getdata (n);
 185       if (o6a->area_id == area_id)
 186         return o6a;
 187     }
 188
 189   return (struct ospf6_area *) NULL;
 190 }
 191
 192 void
 193 ospf6_area_show (struct vty *vty, struct ospf6_area *o6a)
 194 {
 195   listnode i;
 196   struct ospf6_interface *o6i;
 197
 198   vty_out (vty, " Area %s%s", o6a->str, VTY_NEWLINE);
 199   vty_out (vty, "     Number of Area scoped LSAs is %u%s",
 200            o6a->lsdb->count, VTY_NEWLINE);
 201
 202   ospf6_spf_statistics_show (vty, o6a->spf_tree);
 203
 204   vty_out (vty, "     Interface attached to this area:");
 205   for (i = listhead (o6a->if_list); i; nextnode (i))
 206     {
 207       o6i = (struct ospf6_interface *) getdata (i);
 208       vty_out (vty, " %s", o6i->interface->name);
 209     }
 210   vty_out (vty, "%s", VTY_NEWLINE);
 211
 212   for (i = listhead (o6a->if_list); i; nextnode (i))
 213     {
 214       o6i = (struct ospf6_interface *) getdata (i);
 215       if (listcount (o6i->neighbor_list) != 0)
 216         ospf6_interface_statistics_show (vty, o6i);
 217     }
 218 }
 219
 220 void
 221 ospf6_area_statistics_show (struct vty *vty, struct ospf6_area *o6a)
 222 {
 223 #if 0
 224   listnode node;
 225   struct ospf6_interface *o6i;
 226
 227   vty_out (vty, "  Statistics of Area %s%s", o6a->str, VTY_NEWLINE);
 228 #endif
 229 }
 230