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
|
/*
* Zone management.
*
* Copyright (C) 2009-2015 Red Hat ; see COPYRIGHT for license
*/
#include <config.h>
#include <inttypes.h>
#include <stdbool.h>
#include <isc/util.h>
#include <dns/dyndb.h>
#include <dns/view.h>
#include <dns/zone.h>
#include "util.h"
#include "instance.h"
#include "lock.h"
#include "log.h"
#include "zone.h"
extern const char *impname;
/*
* Create a new zone with origin 'name'. The zone stay invisible to clients
* until it is explicitly added to a view.
*/
isc_result_t
create_zone(sample_instance_t * const inst, dns_name_t * const name,
dns_zone_t ** const rawp)
{
isc_result_t result;
dns_zone_t *raw = NULL;
const char *zone_argv[1];
char zone_name[DNS_NAME_FORMATSIZE];
dns_acl_t *acl_any = NULL;
REQUIRE(inst != NULL);
REQUIRE(name != NULL);
REQUIRE(rawp != NULL && *rawp == NULL);
zone_argv[0] = inst->db_name;
CHECK(dns_zone_create(&raw, inst->mctx));
CHECK(dns_zone_setorigin(raw, name));
dns_zone_setclass(raw, dns_rdataclass_in);
dns_zone_settype(raw, dns_zone_master);
CHECK(dns_zone_setdbtype(raw, 1, zone_argv));
CHECK(dns_zonemgr_managezone(inst->zmgr, raw));
/* This is completely insecure - use some sensible values instead! */
CHECK(dns_acl_any(inst->mctx, &acl_any));
dns_zone_setupdateacl(raw, acl_any);
dns_zone_setqueryacl(raw, acl_any);
dns_zone_setxfracl(raw, acl_any);
dns_acl_detach(&acl_any);
*rawp = raw;
return (ISC_R_SUCCESS);
cleanup:
dns_name_format(name, zone_name, DNS_NAME_FORMATSIZE);
log_error_r("failed to create new zone '%s'", zone_name);
if (raw != NULL) {
if (dns_zone_getmgr(raw) != NULL)
dns_zonemgr_releasezone(inst->zmgr, raw);
dns_zone_detach(&raw);
}
if (acl_any != NULL)
dns_acl_detach(&acl_any);
return (result);
}
/*
* Add zone to the view defined in inst->view. This will make the zone visible
* to clients.
*/
static isc_result_t
publish_zone(sample_instance_t *inst, dns_zone_t *zone) {
isc_result_t result;
bool freeze = false;
dns_zone_t *zone_in_view = NULL;
dns_view_t *view_in_zone = NULL;
isc_result_t lock_state = ISC_R_IGNORE;
REQUIRE(inst != NULL);
REQUIRE(zone != NULL);
/* Return success if the zone is already in the view as expected. */
result = dns_view_findzone(inst->view, dns_zone_getorigin(zone),
&zone_in_view);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND)
goto cleanup;
view_in_zone = dns_zone_getview(zone);
if (view_in_zone != NULL) {
/* Zone has a view set -> view should contain the same zone. */
if (zone_in_view == zone) {
/* Zone is already published in the right view. */
CLEANUP_WITH(ISC_R_SUCCESS);
} else if (view_in_zone != inst->view) {
/*
* Un-published inactive zone will have
* inst->view in zone but will not be present
* in the view itself.
*/
dns_zone_log(zone, ISC_LOG_ERROR,
"zone->view doesn't "
"match data in the view");
CLEANUP_WITH(ISC_R_UNEXPECTED);
}
}
if (zone_in_view != NULL) {
dns_zone_log(zone, ISC_LOG_ERROR,
"cannot publish zone: view already "
"contains another zone with this name");
CLEANUP_WITH(ISC_R_UNEXPECTED);
}
run_exclusive_enter(inst, &lock_state);
if (inst->view->frozen) {
freeze = true;
dns_view_thaw(inst->view);
}
dns_zone_setview(zone, inst->view);
CHECK(dns_view_addzone(inst->view, zone));
cleanup:
if (zone_in_view != NULL)
dns_zone_detach(&zone_in_view);
if (freeze)
dns_view_freeze(inst->view);
run_exclusive_exit(inst, lock_state);
return (result);
}
/*
* @warning Never call this on raw part of in-line secure zone, call it only
* on the secure zone!
*/
static isc_result_t
load_zone(dns_zone_t *zone) {
isc_result_t result;
bool zone_dynamic;
uint32_t serial;
result = dns_zone_load(zone);
if (result != ISC_R_SUCCESS && result != DNS_R_UPTODATE
&& result != DNS_R_DYNAMIC && result != DNS_R_CONTINUE)
goto cleanup;
zone_dynamic = (result == DNS_R_DYNAMIC);
CHECK(dns_zone_getserial2(zone, &serial));
dns_zone_log(zone, ISC_LOG_INFO, "loaded serial %u", serial);
if (zone_dynamic)
dns_zone_notify(zone);
cleanup:
return (result);
}
/*
* Add zone to view and call dns_zone_load().
*/
isc_result_t
activate_zone(sample_instance_t *inst, dns_zone_t *raw) {
isc_result_t result;
/*
* Zone has to be published *before* zone load
* otherwise it will race with zone->view != NULL check
* in zone_maintenance() in zone.c.
*/
result = publish_zone(inst, raw);
if (result != ISC_R_SUCCESS) {
dns_zone_log(raw, ISC_LOG_ERROR,
"cannot add zone to view: %s",
dns_result_totext(result));
goto cleanup;
}
CHECK(load_zone(raw));
cleanup:
return (result);
}
|
