1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
|
/*
* OSPF LSDB support.
* Copyright (C) 1999, 2000 Alex Zinin, Kunihiro Ishiguro, Toshiaki Takada
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Zebra; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include <zebra.h>
#include "prefix.h"
#include "table.h"
#include "memory.h"
#include "log.h"
#include "ospfd/ospfd.h"
#include "ospfd/ospf_asbr.h"
#include "ospfd/ospf_lsa.h"
#include "ospfd/ospf_lsdb.h"
struct ospf_lsdb *ospf_lsdb_new()
{
struct ospf_lsdb *new;
new = XCALLOC(MTYPE_OSPF_LSDB, sizeof(struct ospf_lsdb));
ospf_lsdb_init(new);
return new;
}
void ospf_lsdb_init(struct ospf_lsdb *lsdb)
{
int i;
for (i = OSPF_MIN_LSA; i < OSPF_MAX_LSA; i++)
lsdb->type[i].db = route_table_init();
}
void ospf_lsdb_free(struct ospf_lsdb *lsdb)
{
ospf_lsdb_cleanup(lsdb);
XFREE(MTYPE_OSPF_LSDB, lsdb);
}
void ospf_lsdb_cleanup(struct ospf_lsdb *lsdb)
{
int i;
assert(lsdb);
assert(lsdb->total == 0);
ospf_lsdb_delete_all(lsdb);
for (i = OSPF_MIN_LSA; i < OSPF_MAX_LSA; i++)
route_table_finish(lsdb->type[i].db);
}
void ls_prefix_set(struct prefix_ls *lp, struct ospf_lsa *lsa)
{
if (lp && lsa && lsa->data) {
lp->family = 0;
lp->prefixlen = 64;
lp->id = lsa->data->id;
lp->adv_router = lsa->data->adv_router;
}
}
static void ospf_lsdb_delete_entry(struct ospf_lsdb *lsdb,
struct route_node *rn)
{
struct ospf_lsa *lsa = rn->info;
if (!lsa)
return;
assert(rn->table == lsdb->type[lsa->data->type].db);
if (IS_LSA_SELF(lsa))
lsdb->type[lsa->data->type].count_self--;
lsdb->type[lsa->data->type].count--;
lsdb->type[lsa->data->type].checksum -= ntohs(lsa->data->checksum);
lsdb->total--;
rn->info = NULL;
route_unlock_node(rn);
#ifdef MONITOR_LSDB_CHANGE
if (lsdb->del_lsa_hook != NULL)
(*lsdb->del_lsa_hook)(lsa);
#endif /* MONITOR_LSDB_CHANGE */
ospf_lsa_unlock(&lsa); /* lsdb */
return;
}
/* Add new LSA to lsdb. */
void ospf_lsdb_add(struct ospf_lsdb *lsdb, struct ospf_lsa *lsa)
{
struct route_table *table;
struct prefix_ls lp;
struct route_node *rn;
table = lsdb->type[lsa->data->type].db;
ls_prefix_set(&lp, lsa);
rn = route_node_get(table, (struct prefix *)&lp);
/* nothing to do? */
if (rn->info && rn->info == lsa) {
route_unlock_node(rn);
return;
}
/* purge old entry? */
if (rn->info)
ospf_lsdb_delete_entry(lsdb, rn);
if (IS_LSA_SELF(lsa))
lsdb->type[lsa->data->type].count_self++;
lsdb->type[lsa->data->type].count++;
lsdb->total++;
#ifdef MONITOR_LSDB_CHANGE
if (lsdb->new_lsa_hook != NULL)
(*lsdb->new_lsa_hook)(lsa);
#endif /* MONITOR_LSDB_CHANGE */
lsdb->type[lsa->data->type].checksum += ntohs(lsa->data->checksum);
rn->info = ospf_lsa_lock(lsa); /* lsdb */
}
void ospf_lsdb_delete(struct ospf_lsdb *lsdb, struct ospf_lsa *lsa)
{
struct route_table *table;
struct prefix_ls lp;
struct route_node *rn;
if (!lsdb) {
zlog_warn("%s: Called with NULL LSDB", __func__);
if (lsa)
zlog_warn("LSA[Type%d:%s]: LSA %p, lsa->lsdb %p",
lsa->data->type, inet_ntoa(lsa->data->id),
(void *)lsa, (void *)lsa->lsdb);
return;
}
if (!lsa) {
zlog_warn("%s: Called with NULL LSA", __func__);
return;
}
assert(lsa->data->type < OSPF_MAX_LSA);
table = lsdb->type[lsa->data->type].db;
ls_prefix_set(&lp, lsa);
if ((rn = route_node_lookup(table, (struct prefix *)&lp))) {
if (rn->info == lsa)
ospf_lsdb_delete_entry(lsdb, rn);
route_unlock_node(rn); /* route_node_lookup */
}
}
void ospf_lsdb_delete_all(struct ospf_lsdb *lsdb)
{
struct route_table *table;
struct route_node *rn;
int i;
for (i = OSPF_MIN_LSA; i < OSPF_MAX_LSA; i++) {
table = lsdb->type[i].db;
for (rn = route_top(table); rn; rn = route_next(rn))
if (rn->info != NULL)
ospf_lsdb_delete_entry(lsdb, rn);
}
}
void ospf_lsdb_clean_stat(struct ospf_lsdb *lsdb)
{
struct route_table *table;
struct route_node *rn;
struct ospf_lsa *lsa;
int i;
for (i = OSPF_MIN_LSA; i < OSPF_MAX_LSA; i++) {
table = lsdb->type[i].db;
for (rn = route_top(table); rn; rn = route_next(rn))
if ((lsa = (rn->info)) != NULL)
lsa->stat = LSA_SPF_NOT_EXPLORED;
}
}
struct ospf_lsa *ospf_lsdb_lookup(struct ospf_lsdb *lsdb, struct ospf_lsa *lsa)
{
struct route_table *table;
struct prefix_ls lp;
struct route_node *rn;
struct ospf_lsa *find;
table = lsdb->type[lsa->data->type].db;
ls_prefix_set(&lp, lsa);
rn = route_node_lookup(table, (struct prefix *)&lp);
if (rn) {
find = rn->info;
route_unlock_node(rn);
return find;
}
return NULL;
}
struct ospf_lsa *ospf_lsdb_lookup_by_id(struct ospf_lsdb *lsdb, u_char type,
struct in_addr id,
struct in_addr adv_router)
{
struct route_table *table;
struct prefix_ls lp;
struct route_node *rn;
struct ospf_lsa *find;
table = lsdb->type[type].db;
memset(&lp, 0, sizeof(struct prefix_ls));
lp.family = 0;
lp.prefixlen = 64;
lp.id = id;
lp.adv_router = adv_router;
rn = route_node_lookup(table, (struct prefix *)&lp);
if (rn) {
find = rn->info;
route_unlock_node(rn);
return find;
}
return NULL;
}
struct ospf_lsa *ospf_lsdb_lookup_by_id_next(struct ospf_lsdb *lsdb,
u_char type, struct in_addr id,
struct in_addr adv_router,
int first)
{
struct route_table *table;
struct prefix_ls lp;
struct route_node *rn;
struct ospf_lsa *find;
table = lsdb->type[type].db;
memset(&lp, 0, sizeof(struct prefix_ls));
lp.family = 0;
lp.prefixlen = 64;
lp.id = id;
lp.adv_router = adv_router;
if (first)
rn = route_top(table);
else {
if ((rn = route_node_lookup(table, (struct prefix *)&lp))
== NULL)
return NULL;
rn = route_next(rn);
}
for (; rn; rn = route_next(rn))
if (rn->info)
break;
if (rn && rn->info) {
find = rn->info;
route_unlock_node(rn);
return find;
}
return NULL;
}
unsigned long ospf_lsdb_count_all(struct ospf_lsdb *lsdb)
{
return lsdb->total;
}
unsigned long ospf_lsdb_count(struct ospf_lsdb *lsdb, int type)
{
return lsdb->type[type].count;
}
unsigned long ospf_lsdb_count_self(struct ospf_lsdb *lsdb, int type)
{
return lsdb->type[type].count_self;
}
unsigned int ospf_lsdb_checksum(struct ospf_lsdb *lsdb, int type)
{
return lsdb->type[type].checksum;
}
unsigned long ospf_lsdb_isempty(struct ospf_lsdb *lsdb)
{
return (lsdb->total == 0);
}
|
