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
|
/* Copyright (C) 2023 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program 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 3 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <time.h>
#include "knot/dnssec/kasp/kasp_db.h"
#include "knot/events/replan.h"
#define TIME_CANCEL 0
#define TIME_IGNORE (-1)
/*!
* \brief Move DDNS queue from old zone to new zone and replan if necessary.
*
* New zone will contain references from the old zone. New zone will free
* the data.
*/
static void replan_ddns(zone_t *zone, zone_t *old_zone)
{
if (old_zone->ddns_queue_size == 0) {
return;
}
ptrnode_t *node;
WALK_LIST(node, old_zone->ddns_queue) {
ptrlist_add(&zone->ddns_queue, node->d, NULL);
}
zone->ddns_queue_size = old_zone->ddns_queue_size;
ptrlist_free(&old_zone->ddns_queue, NULL);
zone_events_schedule_now(zone, ZONE_EVENT_UPDATE);
}
/*!
* \brief Replan events that are already planned for the old zone.
*
* \notice Preserves notifailed.
*/
static void replan_from_zone(zone_t *zone, zone_t *old_zone)
{
assert(zone);
assert(old_zone);
replan_ddns(zone, old_zone);
const zone_event_type_t types[] = {
ZONE_EVENT_REFRESH,
ZONE_EVENT_FLUSH,
ZONE_EVENT_BACKUP,
ZONE_EVENT_NOTIFY,
ZONE_EVENT_UFREEZE,
ZONE_EVENT_UTHAW,
ZONE_EVENT_INVALID
};
for (const zone_event_type_t *type = types; *type != ZONE_EVENT_INVALID; type++) {
time_t when = zone_events_get_time(old_zone, *type);
if (when > 0) {
zone_events_schedule_at(zone, *type, when);
}
}
}
/*!
* \brief Replan DNSSEC if automatic signing enabled.
*
* This is required as the configuration could have changed.
*/
static void replan_dnssec(conf_t *conf, zone_t *zone)
{
assert(conf);
assert(zone);
conf_val_t val = conf_zone_get(conf, C_DNSSEC_SIGNING, zone->name);
if (conf_bool(&val)) {
zone_events_schedule_now(zone, ZONE_EVENT_DNSSEC);
}
}
/*!
* \brief Replan events that depend on zone timers (REFRESH, EXPIRE, FLUSH, RESALT, PARENT DS QUERY).
*/
void replan_from_timers(conf_t *conf, zone_t *zone)
{
assert(conf);
assert(zone);
time_t now = time(NULL);
time_t refresh = TIME_CANCEL;
if (zone_is_slave(conf, zone)) {
refresh = zone->timers.next_refresh;
if (zone->contents == NULL && zone->timers.last_refresh_ok) { // zone disappeared w/o expiry
refresh = now;
}
assert(refresh > 0);
}
time_t expire_pre = TIME_IGNORE;
time_t expire = TIME_IGNORE;
if (zone_is_slave(conf, zone) && zone->contents != NULL) {
expire_pre = TIME_CANCEL;
expire = zone->timers.next_expire;
}
time_t flush = TIME_IGNORE;
if (!zone_is_slave(conf, zone) || zone->contents != NULL) {
conf_val_t val = conf_zone_get(conf, C_ZONEFILE_SYNC, zone->name);
int64_t sync_timeout = conf_int(&val);
if (sync_timeout > 0) {
flush = zone->timers.last_flush + sync_timeout;
}
}
time_t resalt = TIME_IGNORE;
time_t ds_check = TIME_CANCEL;
time_t ds_push = TIME_CANCEL;
conf_val_t val = conf_zone_get(conf, C_DNSSEC_SIGNING, zone->name);
if (conf_bool(&val)) {
conf_val_t policy = conf_zone_get(conf, C_DNSSEC_POLICY, zone->name);
conf_id_fix_default(&policy);
val = conf_id_get(conf, C_POLICY, C_NSEC3, &policy);
if (conf_bool(&val)) {
knot_time_t last_resalt = 0;
if (knot_lmdb_open(zone_kaspdb(zone)) == KNOT_EOK) {
(void)kasp_db_load_nsec3salt(zone_kaspdb(zone), zone->name, NULL, &last_resalt);
}
if (last_resalt == 0) {
resalt = now;
} else {
val = conf_id_get(conf, C_POLICY, C_NSEC3_SALT_LIFETIME, &policy);
if (conf_int(&val) > 0) {
resalt = last_resalt + conf_int(&val);
}
}
}
ds_check = zone->timers.next_ds_check;
if (ds_check == 0) {
ds_check = TIME_IGNORE;
}
ds_push = zone->timers.next_ds_push;
if (ds_push == 0) {
ds_push = TIME_IGNORE;
}
}
zone_events_schedule_at(zone,
ZONE_EVENT_REFRESH, refresh,
ZONE_EVENT_EXPIRE, expire_pre,
ZONE_EVENT_EXPIRE, expire,
ZONE_EVENT_FLUSH, flush,
ZONE_EVENT_DNSSEC, resalt,
ZONE_EVENT_DS_CHECK, ds_check,
ZONE_EVENT_DS_PUSH, ds_push);
}
void replan_load_new(zone_t *zone, bool gen_catalog)
{
if (gen_catalog) {
/* Catalog generation must wait until the zonedb
* is fully created. */
zone_events_schedule_now(zone, ZONE_EVENT_LOAD);
} else {
/* Enqueue directly, make first load waitable,
* other events will cascade from load. */
zone_events_enqueue(zone, ZONE_EVENT_LOAD);
}
}
void replan_load_bootstrap(conf_t *conf, zone_t *zone)
{
replan_from_timers(conf, zone);
}
void replan_load_current(conf_t *conf, zone_t *zone, zone_t *old_zone)
{
replan_from_zone(zone, old_zone);
if (zone->contents != NULL || zone_expired(zone)) {
replan_from_timers(conf, zone);
replan_dnssec(conf, zone);
} else {
zone_events_schedule_now(zone, ZONE_EVENT_LOAD);
}
}
void replan_load_updated(zone_t *zone, zone_t *old_zone)
{
zone_notifailed_clear(zone);
replan_from_zone(zone, old_zone);
// other events will cascade from load
zone_events_schedule_now(zone, ZONE_EVENT_LOAD);
}
|
