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
25static int area_index;
26#define IS_OSPF6_DUMP_AREA (ospf6_dump_is_on (area_index))
27
28static void
29ospf6_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
42static void
43ospf6_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
56static int
57ospf6_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
74void
75ospf6_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
86int
87ospf6_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
94int
95ospf6_area_is_transit (struct ospf6_area *o6a)
96{
97  return 0;
98}
99
100
101
102void
103ospf6_area_intra_topo_add (struct ospf6_route_req *topo_entry)
104{
105  if (topo_entry->route.type == OSPF6_DEST_TYPE_ROUTER)
106    {
107      if (CHECK_FLAG (topo_entry->path.router_bits, OSPF6_ROUTER_LSA_BIT_B))
108        ospf6_abr_abr_entry_add (topo_entry);
109    }
110  CALL_ADD_HOOK (&intra_topology_hook, topo_entry);
111}
112
113void
114ospf6_area_intra_topo_remove (struct ospf6_route_req *topo_entry)
115{
116  if (topo_entry->route.type == OSPF6_DEST_TYPE_ROUTER)
117    {
118      if (CHECK_FLAG (topo_entry->path.router_bits, OSPF6_ROUTER_LSA_BIT_E))
119        ospf6_abr_abr_entry_add (topo_entry);
120    }
121  CALL_REMOVE_HOOK (&intra_topology_hook, topo_entry);
122}
123
124void
125ospf6_area_route_add (void *data)
126{
127  struct ospf6_route_req *route = data;
128  struct in6_addr local;
129
130  inet_pton (AF_INET6, "::1", &local);
131  if (! memcmp (&route->nexthop.address, &local, sizeof (struct in6_addr)))
132    {
133      if (IS_OSPF6_DUMP_AREA)
134        zlog_info ("AREA: Self-originated route add, ignore");
135      return;
136    }
137
138  ospf6_route_add (route, ospf6->route_table);
139}
140
141void
142ospf6_area_route_remove (void *data)
143{
144  struct ospf6_route_req *route = data;
145  struct in6_addr local;
146
147  inet_pton (AF_INET6, "::1", &local);
148  if (! memcmp (&route->nexthop.address, &local, sizeof (struct in6_addr)))
149    {
150      if (IS_OSPF6_DUMP_AREA)
151        zlog_info ("AREA: Self-originated route remove, ignore");
152      return;
153    }
154
155  ospf6_route_remove (route, ospf6->route_table);
156}
157
158/* Make new area structure */
159struct ospf6_area *
160ospf6_area_create (u_int32_t area_id)
161{
162  struct ospf6_area *o6a;
163  char namebuf[64];
164
165  /* allocate memory */
166  o6a = XCALLOC (MTYPE_OSPF6_AREA, sizeof (struct ospf6_area));
167
168  /* initialize */
169  inet_ntop (AF_INET, &area_id, o6a->str, sizeof (o6a->str));
170  o6a->area_id = area_id;
171  o6a->if_list = list_new ();
172
173  o6a->lsdb = ospf6_lsdb_create ();
174  o6a->spf_tree = ospf6_spftree_create ();
175
176  snprintf (namebuf, sizeof (namebuf), "Area %s's route table", o6a->str);
177  o6a->route_table = ospf6_route_table_create (namebuf);
178  o6a->route_table->hook_add = ospf6_area_route_add;
179  o6a->route_table->hook_change = ospf6_area_route_add;
180  o6a->route_table->hook_remove = ospf6_area_route_remove;
181
182  snprintf (namebuf, sizeof (namebuf), "Area %s's topology table", o6a->str);
183  o6a->table_topology = ospf6_route_table_create (namebuf);
184  o6a->table_topology->hook_add = ospf6_intra_topology_add;
185  o6a->table_topology->hook_change = ospf6_intra_topology_add;
186  o6a->table_topology->hook_remove = ospf6_intra_topology_remove;
187
188  /* xxx, set options */
189  OSPF6_OPT_SET (o6a->options, OSPF6_OPT_V6);
190  OSPF6_OPT_SET (o6a->options, OSPF6_OPT_E);
191  OSPF6_OPT_SET (o6a->options, OSPF6_OPT_R);
192
193  o6a->foreach_if = ospf6_area_foreach_interface;
194  o6a->foreach_nei = ospf6_area_foreach_neighbor;
195
196  return o6a;
197}
198
199void
200ospf6_area_bind_top (struct ospf6_area *o6a, struct ospf6 *o6)
201{
202  o6a->ospf6 = o6;
203  CALL_CHANGE_HOOK (&area_hook, o6a);
204  return;
205}
206
207void
208ospf6_area_delete (struct ospf6_area *o6a)
209{
210  listnode n;
211  struct ospf6_interface *o6i;
212
213  CALL_REMOVE_HOOK (&area_hook, o6a);
214
215  /* ospf6 interface list */
216  for (n = listhead (o6a->if_list); n; nextnode (n))
217    {
218      o6i = (struct ospf6_interface *) getdata (n);
219      /* ospf6_interface_delete (o6i); */
220    }
221  list_delete (o6a->if_list);
222
223  /* terminate LSDB */
224  ospf6_lsdb_remove_all (o6a->lsdb);
225
226  /* spf tree terminate */
227  /* xxx */
228
229  /* threads */
230  if (o6a->spf_calc)
231    thread_cancel (o6a->spf_calc);
232  o6a->spf_calc = (struct thread *) NULL;
233  if (o6a->route_calc)
234    thread_cancel (o6a->route_calc);
235  o6a->route_calc = (struct thread *) NULL;
236
237  /* new */
238  ospf6_route_table_delete (o6a->route_table);
239
240  ospf6_spftree_delete (o6a->spf_tree);
241  ospf6_route_table_delete (o6a->table_topology);
242
243  /* free area */
244  XFREE (MTYPE_OSPF6_AREA, o6a);
245}
246
247struct ospf6_area *
248ospf6_area_lookup (u_int32_t area_id, struct ospf6 *o6)
249{
250  struct ospf6_area *o6a;
251  listnode n;
252
253  for (n = listhead (o6->area_list); n; nextnode (n))
254    {
255      o6a = (struct ospf6_area *) getdata (n);
256      if (o6a->area_id == area_id)
257        return o6a;
258    }
259
260  return (struct ospf6_area *) NULL;
261}
262
263void
264ospf6_area_show (struct vty *vty, struct ospf6_area *o6a)
265{
266  listnode i;
267  struct ospf6_interface *o6i;
268
269  vty_out (vty, " Area %s%s", o6a->str, VTY_NEWLINE);
270  vty_out (vty, "     Number of Area scoped LSAs is %u%s",
271           o6a->lsdb->count, VTY_NEWLINE);
272
273  ospf6_spf_statistics_show (vty, o6a->spf_tree);
274
275  vty_out (vty, "     Interface attached to this area:");
276  for (i = listhead (o6a->if_list); i; nextnode (i))
277    {
278      o6i = (struct ospf6_interface *) getdata (i);
279      vty_out (vty, " %s", o6i->interface->name);
280    }
281  vty_out (vty, "%s", VTY_NEWLINE);
282
283  for (i = listhead (o6a->if_list); i; nextnode (i))
284    {
285      o6i = (struct ospf6_interface *) getdata (i);
286      if (listcount (o6i->neighbor_list) != 0)
287        ospf6_interface_statistics_show (vty, o6i);
288    }
289}
290
291void
292ospf6_area_statistics_show (struct vty *vty, struct ospf6_area *o6a)
293{
294#if 0
295  listnode node;
296  struct ospf6_interface *o6i;
297
298  vty_out (vty, "  Statistics of Area %s%s", o6a->str, VTY_NEWLINE);
299#endif
300}
301
302DEFUN (show_ipv6_ospf6_area_route,
303       show_ipv6_ospf6_area_route_cmd,
304       "show ipv6 ospf6 area A.B.C.D route",
305       SHOW_STR
306       IP6_STR
307       OSPF6_STR
308       OSPF6_AREA_STR
309       OSPF6_AREA_ID_STR
310       ROUTE_STR
311       )
312{
313  struct ospf6_area *o6a;
314  u_int32_t area_id;
315
316  OSPF6_CMD_CHECK_RUNNING ();
317
318  inet_pton (AF_INET, argv[0], &area_id);
319  o6a = ospf6_area_lookup (area_id, ospf6);
320
321  if (! o6a)
322    return CMD_SUCCESS;
323
324  argc -= 1;
325  argv += 1;
326
327  return ospf6_route_table_show (vty, argc, argv, o6a->route_table);
328}
329
330ALIAS (show_ipv6_ospf6_area_route,
331       show_ipv6_ospf6_area_route_prefix_cmd,
332       "show ipv6 ospf6 area A.B.C.D route (X::X|detail)",
333       SHOW_STR
334       IP6_STR
335       OSPF6_STR
336       OSPF6_AREA_STR
337       OSPF6_AREA_ID_STR
338       ROUTE_STR
339       "Specify IPv6 address\n"
340       "Detailed information\n"
341       )
342
343void
344ospf6_area_init ()
345{
346  area_index = ospf6_dump_install ("area", "Area information\n");
347
348  install_element (VIEW_NODE, &show_ipv6_ospf6_area_route_cmd);
349  install_element (VIEW_NODE, &show_ipv6_ospf6_area_route_prefix_cmd);
350  install_element (ENABLE_NODE, &show_ipv6_ospf6_area_route_cmd);
351  install_element (ENABLE_NODE, &show_ipv6_ospf6_area_route_prefix_cmd);
352}
353
354
355