Mercurial > hg > nginx
annotate src/core/ngx_resolver.c @ 4321:c7e65deabf0d release-1.1.10
nginx-1.1.10-RELEASE
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 30 Nov 2011 10:00:50 +0000 |
parents | 783fd9c38d98 |
children | d620f497c50f |
rev | line source |
---|---|
583 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 */ | |
5 | |
6 | |
7 #include <ngx_config.h> | |
8 #include <ngx_core.h> | |
9 #include <ngx_event.h> | |
10 | |
11 | |
1649 | 12 #define NGX_RESOLVER_UDP_SIZE 4096 |
13 | |
14 | |
583 | 15 typedef struct { |
1649 | 16 u_char ident_hi; |
17 u_char ident_lo; | |
18 u_char flags_hi; | |
19 u_char flags_lo; | |
20 u_char nqs_hi; | |
21 u_char nqs_lo; | |
22 u_char nan_hi; | |
23 u_char nan_lo; | |
24 u_char nns_hi; | |
25 u_char nns_lo; | |
26 u_char nar_hi; | |
27 u_char nar_lo; | |
28 } ngx_resolver_query_t; | |
29 | |
30 | |
31 typedef struct { | |
32 u_char type_hi; | |
33 u_char type_lo; | |
34 u_char class_hi; | |
35 u_char class_lo; | |
36 } ngx_resolver_qs_t; | |
37 | |
38 | |
39 typedef struct { | |
40 u_char type_hi; | |
41 u_char type_lo; | |
42 u_char class_hi; | |
43 u_char class_lo; | |
44 u_char ttl[4]; | |
45 u_char len_hi; | |
46 u_char len_lo; | |
47 } ngx_resolver_an_t; | |
48 | |
49 | |
50 ngx_int_t ngx_udp_connect(ngx_udp_connection_t *uc); | |
51 | |
52 | |
1906 | 53 static void ngx_resolver_cleanup(void *data); |
54 static void ngx_resolver_cleanup_tree(ngx_resolver_t *r, ngx_rbtree_t *tree); | |
1649 | 55 static ngx_int_t ngx_resolve_name_locked(ngx_resolver_t *r, |
56 ngx_resolver_ctx_t *ctx); | |
57 static void ngx_resolver_expire(ngx_resolver_t *r, ngx_rbtree_t *tree, | |
58 ngx_queue_t *queue); | |
59 static ngx_int_t ngx_resolver_send_query(ngx_resolver_t *r, | |
60 ngx_resolver_node_t *rn); | |
61 static ngx_int_t ngx_resolver_create_name_query(ngx_resolver_node_t *rn, | |
62 ngx_resolver_ctx_t *ctx); | |
63 static ngx_int_t ngx_resolver_create_addr_query(ngx_resolver_node_t *rn, | |
64 ngx_resolver_ctx_t *ctx); | |
65 static void ngx_resolver_resend_handler(ngx_event_t *ev); | |
66 static time_t ngx_resolver_resend(ngx_resolver_t *r, ngx_rbtree_t *tree, | |
67 ngx_queue_t *queue); | |
68 static void ngx_resolver_read_response(ngx_event_t *rev); | |
69 static void ngx_resolver_process_response(ngx_resolver_t *r, u_char *buf, | |
70 size_t n); | |
71 static void ngx_resolver_process_a(ngx_resolver_t *r, u_char *buf, size_t n, | |
1742
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
72 ngx_uint_t ident, ngx_uint_t code, ngx_uint_t nan, ngx_uint_t ans); |
1649 | 73 static void ngx_resolver_process_ptr(ngx_resolver_t *r, u_char *buf, size_t n, |
1742
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
74 ngx_uint_t ident, ngx_uint_t code, ngx_uint_t nan); |
1649 | 75 static ngx_resolver_node_t *ngx_resolver_lookup_name(ngx_resolver_t *r, |
76 ngx_str_t *name, uint32_t hash); | |
77 static ngx_resolver_node_t *ngx_resolver_lookup_addr(ngx_resolver_t *r, | |
78 in_addr_t addr); | |
79 static void ngx_resolver_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
80 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel); | |
81 static ngx_int_t ngx_resolver_copy(ngx_resolver_t *r, ngx_str_t *name, | |
82 u_char *buf, u_char *src, u_char *last); | |
83 static void ngx_resolver_timeout_handler(ngx_event_t *ev); | |
84 static void ngx_resolver_free_node(ngx_resolver_t *r, ngx_resolver_node_t *rn); | |
85 static void *ngx_resolver_alloc(ngx_resolver_t *r, size_t size); | |
1903 | 86 static void *ngx_resolver_calloc(ngx_resolver_t *r, size_t size); |
1649 | 87 static void ngx_resolver_free(ngx_resolver_t *r, void *p); |
88 static void ngx_resolver_free_locked(ngx_resolver_t *r, void *p); | |
89 static void *ngx_resolver_dup(ngx_resolver_t *r, void *src, size_t size); | |
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
90 static u_char *ngx_resolver_log_error(ngx_log_t *log, u_char *buf, size_t len); |
1649 | 91 |
92 | |
93 ngx_resolver_t * | |
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
94 ngx_resolver_create(ngx_conf_t *cf, ngx_str_t *names, ngx_uint_t n) |
1649 | 95 { |
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
96 ngx_str_t s; |
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
97 ngx_url_t u; |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
98 ngx_uint_t i; |
1649 | 99 ngx_resolver_t *r; |
1906 | 100 ngx_pool_cleanup_t *cln; |
1649 | 101 ngx_udp_connection_t *uc; |
102 | |
1913
c0f873458e2b
use cf->cycle->new_log because at merge stage cf->pool->log is old log
Igor Sysoev <igor@sysoev.ru>
parents:
1906
diff
changeset
|
103 cln = ngx_pool_cleanup_add(cf->pool, 0); |
1906 | 104 if (cln == NULL) { |
105 return NULL; | |
106 } | |
107 | |
108 cln->handler = ngx_resolver_cleanup; | |
109 | |
1913
c0f873458e2b
use cf->cycle->new_log because at merge stage cf->pool->log is old log
Igor Sysoev <igor@sysoev.ru>
parents:
1906
diff
changeset
|
110 r = ngx_calloc(sizeof(ngx_resolver_t), cf->log); |
1649 | 111 if (r == NULL) { |
112 return NULL; | |
113 } | |
114 | |
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
115 if (n) { |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
116 if (ngx_array_init(&r->udp_connections, cf->pool, n, |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
117 sizeof(ngx_udp_connection_t)) |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
118 != NGX_OK) |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
119 { |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
120 return NULL; |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
121 } |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
122 } |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
123 |
1906 | 124 cln->data = r; |
125 | |
1913
c0f873458e2b
use cf->cycle->new_log because at merge stage cf->pool->log is old log
Igor Sysoev <igor@sysoev.ru>
parents:
1906
diff
changeset
|
126 r->event = ngx_calloc(sizeof(ngx_event_t), cf->log); |
1649 | 127 if (r->event == NULL) { |
128 return NULL; | |
129 } | |
130 | |
1687 | 131 ngx_rbtree_init(&r->name_rbtree, &r->name_sentinel, |
132 ngx_resolver_rbtree_insert_value); | |
133 | |
134 ngx_rbtree_init(&r->addr_rbtree, &r->addr_sentinel, | |
135 ngx_rbtree_insert_value); | |
1649 | 136 |
1685 | 137 ngx_queue_init(&r->name_resend_queue); |
138 ngx_queue_init(&r->addr_resend_queue); | |
139 | |
140 ngx_queue_init(&r->name_expire_queue); | |
141 ngx_queue_init(&r->addr_expire_queue); | |
1649 | 142 |
143 r->event->handler = ngx_resolver_resend_handler; | |
144 r->event->data = r; | |
2785
d478379e51ac
*) refactor error_log processing: listen socket log might inherit built-in
Igor Sysoev <igor@sysoev.ru>
parents:
2490
diff
changeset
|
145 r->event->log = &cf->cycle->new_log; |
1649 | 146 r->ident = -1; |
147 | |
148 r->resend_timeout = 5; | |
149 r->expire = 30; | |
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
150 r->valid = 0; |
1649 | 151 |
2785
d478379e51ac
*) refactor error_log processing: listen socket log might inherit built-in
Igor Sysoev <igor@sysoev.ru>
parents:
2490
diff
changeset
|
152 r->log = &cf->cycle->new_log; |
3763
beca53d6ab3c
decrease resolver errors level to error
Igor Sysoev <igor@sysoev.ru>
parents:
3642
diff
changeset
|
153 r->log_level = NGX_LOG_ERR; |
1649 | 154 |
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
155 for (i = 0; i < n; i++) { |
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
156 if (ngx_strncmp(names[i].data, "valid=", 6) == 0) { |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
157 s.len = names[i].len - 6; |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
158 s.data = names[i].data + 6; |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
159 |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
160 r->valid = ngx_parse_time(&s, 1); |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
161 |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
162 if (r->valid == NGX_ERROR) { |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
163 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
164 "invalid parameter: %V", &names[i]); |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
165 return NULL; |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
166 } |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
167 |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
168 continue; |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
169 } |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
170 |
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
171 ngx_memzero(&u, sizeof(ngx_url_t)); |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
172 |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
173 u.host = names[i]; |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
174 u.port = 53; |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
175 |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
176 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) { |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
177 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%V: %s", &u.host, u.err); |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
178 return NULL; |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
179 } |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
180 |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
181 uc = ngx_array_push(&r->udp_connections); |
1683
1e0b028055ec
allow to use IP addresses without defined resolver
Igor Sysoev <igor@sysoev.ru>
parents:
1679
diff
changeset
|
182 if (uc == NULL) { |
1e0b028055ec
allow to use IP addresses without defined resolver
Igor Sysoev <igor@sysoev.ru>
parents:
1679
diff
changeset
|
183 return NULL; |
1e0b028055ec
allow to use IP addresses without defined resolver
Igor Sysoev <igor@sysoev.ru>
parents:
1679
diff
changeset
|
184 } |
1e0b028055ec
allow to use IP addresses without defined resolver
Igor Sysoev <igor@sysoev.ru>
parents:
1679
diff
changeset
|
185 |
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
186 ngx_memzero(uc, sizeof(ngx_udp_connection_t)); |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
187 |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
188 uc->sockaddr = u.addrs->sockaddr; |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
189 uc->socklen = u.addrs->socklen; |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
190 uc->server = u.addrs->name; |
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
191 |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
192 uc->log = cf->cycle->new_log; |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
193 uc->log.handler = ngx_resolver_log_error; |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
194 uc->log.data = uc; |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
195 uc->log.action = "resolving"; |
1683
1e0b028055ec
allow to use IP addresses without defined resolver
Igor Sysoev <igor@sysoev.ru>
parents:
1679
diff
changeset
|
196 } |
1649 | 197 |
198 return r; | |
199 } | |
200 | |
201 | |
1906 | 202 static void |
203 ngx_resolver_cleanup(void *data) | |
204 { | |
205 ngx_resolver_t *r = data; | |
206 | |
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
207 ngx_uint_t i; |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
208 ngx_udp_connection_t *uc; |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
209 |
1906 | 210 if (r) { |
211 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, | |
212 "cleanup resolver"); | |
213 | |
214 ngx_resolver_cleanup_tree(r, &r->name_rbtree); | |
215 | |
216 ngx_resolver_cleanup_tree(r, &r->addr_rbtree); | |
217 | |
218 if (r->event) { | |
219 ngx_free(r->event); | |
220 } | |
221 | |
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
222 |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
223 uc = r->udp_connections.elts; |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
224 |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
225 for (i = 0; i < r->udp_connections.nelts; i++) { |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
226 if (uc[i].connection) { |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
227 ngx_close_connection(uc[i].connection); |
1906 | 228 } |
229 } | |
230 | |
231 ngx_free(r); | |
232 } | |
233 } | |
234 | |
235 | |
236 static void | |
237 ngx_resolver_cleanup_tree(ngx_resolver_t *r, ngx_rbtree_t *tree) | |
238 { | |
239 ngx_resolver_ctx_t *ctx, *next; | |
240 ngx_resolver_node_t *rn; | |
241 | |
242 while (tree->root != tree->sentinel) { | |
243 | |
244 rn = (ngx_resolver_node_t *) ngx_rbtree_min(tree->root, tree->sentinel); | |
245 | |
246 ngx_queue_remove(&rn->queue); | |
247 | |
248 for (ctx = rn->waiting; ctx; ctx = next) { | |
2006
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1969
diff
changeset
|
249 next = ctx->next; |
1906 | 250 |
251 if (ctx->event) { | |
252 ngx_resolver_free(r, ctx->event); | |
253 } | |
254 | |
255 ngx_resolver_free(r, ctx); | |
256 } | |
257 | |
258 ngx_rbtree_delete(tree, &rn->node); | |
259 | |
260 ngx_resolver_free_node(r, rn); | |
261 } | |
262 } | |
263 | |
264 | |
1649 | 265 ngx_resolver_ctx_t * |
266 ngx_resolve_start(ngx_resolver_t *r, ngx_resolver_ctx_t *temp) | |
267 { | |
268 in_addr_t addr; | |
269 ngx_resolver_ctx_t *ctx; | |
270 | |
271 if (temp) { | |
272 addr = ngx_inet_addr(temp->name.data, temp->name.len); | |
273 | |
274 if (addr != INADDR_NONE) { | |
275 temp->resolver = r; | |
276 temp->state = NGX_OK; | |
277 temp->naddrs = 1; | |
278 temp->addrs = &temp->addr; | |
279 temp->addr = addr; | |
280 temp->quick = 1; | |
281 | |
282 return temp; | |
283 } | |
284 } | |
285 | |
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
286 if (r->udp_connections.nelts == 0) { |
1683
1e0b028055ec
allow to use IP addresses without defined resolver
Igor Sysoev <igor@sysoev.ru>
parents:
1679
diff
changeset
|
287 return NGX_NO_RESOLVER; |
1e0b028055ec
allow to use IP addresses without defined resolver
Igor Sysoev <igor@sysoev.ru>
parents:
1679
diff
changeset
|
288 } |
1e0b028055ec
allow to use IP addresses without defined resolver
Igor Sysoev <igor@sysoev.ru>
parents:
1679
diff
changeset
|
289 |
1649 | 290 ctx = ngx_resolver_calloc(r, sizeof(ngx_resolver_ctx_t)); |
291 | |
292 if (ctx) { | |
293 ctx->resolver = r; | |
294 } | |
295 | |
296 return ctx; | |
297 } | |
298 | |
299 | |
300 ngx_int_t | |
301 ngx_resolve_name(ngx_resolver_ctx_t *ctx) | |
302 { | |
303 ngx_int_t rc; | |
304 ngx_resolver_t *r; | |
305 | |
306 r = ctx->resolver; | |
307 | |
308 ngx_log_debug1(NGX_LOG_DEBUG_CORE, r->log, 0, | |
309 "resolve: \"%V\"", &ctx->name); | |
310 | |
311 if (ctx->quick) { | |
312 ctx->handler(ctx); | |
313 return NGX_OK; | |
314 } | |
315 | |
316 /* lock name mutex */ | |
317 | |
318 rc = ngx_resolve_name_locked(r, ctx); | |
319 | |
320 if (rc == NGX_OK) { | |
321 return NGX_OK; | |
322 } | |
323 | |
324 /* unlock name mutex */ | |
325 | |
326 if (rc == NGX_AGAIN) { | |
327 return NGX_OK; | |
328 } | |
329 | |
1904
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
330 /* NGX_ERROR */ |
1649 | 331 |
332 if (ctx->event) { | |
1904
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
333 ngx_resolver_free(r, ctx->event); |
1649 | 334 } |
335 | |
1904
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
336 ngx_resolver_free(r, ctx); |
1649 | 337 |
338 return NGX_ERROR; | |
339 } | |
340 | |
341 | |
342 void | |
343 ngx_resolve_name_done(ngx_resolver_ctx_t *ctx) | |
344 { | |
345 uint32_t hash; | |
346 ngx_resolver_t *r; | |
347 ngx_resolver_ctx_t *w, **p; | |
348 ngx_resolver_node_t *rn; | |
349 | |
350 r = ctx->resolver; | |
351 | |
352 ngx_log_debug1(NGX_LOG_DEBUG_CORE, r->log, 0, | |
353 "resolve name done: %i", ctx->state); | |
354 | |
355 if (ctx->quick) { | |
356 return; | |
357 } | |
358 | |
359 if (ctx->event && ctx->event->timer_set) { | |
360 ngx_del_timer(ctx->event); | |
361 } | |
362 | |
363 /* lock name mutex */ | |
364 | |
365 if (ctx->state == NGX_AGAIN || ctx->state == NGX_RESOLVE_TIMEDOUT) { | |
366 | |
367 hash = ngx_crc32_short(ctx->name.data, ctx->name.len); | |
368 | |
369 rn = ngx_resolver_lookup_name(r, &ctx->name, hash); | |
370 | |
371 if (rn) { | |
372 p = &rn->waiting; | |
373 w = rn->waiting; | |
374 | |
375 while (w) { | |
376 if (w == ctx) { | |
377 *p = w->next; | |
378 | |
379 goto done; | |
380 } | |
381 | |
382 p = &w->next; | |
383 w = w->next; | |
384 } | |
385 } | |
386 | |
387 ngx_log_error(NGX_LOG_ALERT, r->log, 0, | |
388 "could not cancel %V resolving", &ctx->name); | |
389 } | |
390 | |
391 done: | |
392 | |
393 ngx_resolver_expire(r, &r->name_rbtree, &r->name_expire_queue); | |
394 | |
395 /* unlock name mutex */ | |
396 | |
1904
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
397 /* lock alloc mutex */ |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
398 |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
399 if (ctx->event) { |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
400 ngx_resolver_free_locked(r, ctx->event); |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
401 } |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
402 |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
403 ngx_resolver_free_locked(r, ctx); |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
404 |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
405 /* unlock alloc mutex */ |
1649 | 406 } |
407 | |
408 | |
409 /* NGX_RESOLVE_A only */ | |
410 | |
411 static ngx_int_t | |
412 ngx_resolve_name_locked(ngx_resolver_t *r, ngx_resolver_ctx_t *ctx) | |
413 { | |
414 uint32_t hash; | |
415 in_addr_t addr, *addrs; | |
1961
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
416 ngx_int_t rc; |
1649 | 417 ngx_uint_t naddrs; |
418 ngx_resolver_ctx_t *next; | |
419 ngx_resolver_node_t *rn; | |
420 | |
421 hash = ngx_crc32_short(ctx->name.data, ctx->name.len); | |
422 | |
423 rn = ngx_resolver_lookup_name(r, &ctx->name, hash); | |
424 | |
425 if (rn) { | |
426 | |
427 if (rn->valid >= ngx_time()) { | |
428 | |
429 ngx_log_debug0(NGX_LOG_DEBUG_CORE, r->log, 0, "resolve cached"); | |
430 | |
431 ngx_queue_remove(&rn->queue); | |
432 | |
433 rn->expire = ngx_time() + r->expire; | |
434 | |
435 ngx_queue_insert_head(&r->name_expire_queue, &rn->queue); | |
436 | |
437 naddrs = rn->naddrs; | |
438 | |
439 if (naddrs) { | |
440 | |
441 /* NGX_RESOLVE_A answer */ | |
442 | |
443 if (naddrs != 1) { | |
444 addr = 0; | |
445 addrs = ngx_resolver_dup(r, rn->u.addrs, | |
446 naddrs * sizeof(in_addr_t)); | |
447 if (addrs == NULL) { | |
448 return NGX_ERROR; | |
449 } | |
450 | |
451 } else { | |
452 addr = rn->u.addr; | |
453 addrs = NULL; | |
454 } | |
455 | |
456 ctx->next = rn->waiting; | |
457 rn->waiting = NULL; | |
458 | |
459 /* unlock name mutex */ | |
460 | |
461 do { | |
462 ctx->state = NGX_OK; | |
463 ctx->naddrs = naddrs; | |
464 ctx->addrs = (naddrs == 1) ? &ctx->addr : addrs; | |
465 ctx->addr = addr; | |
466 next = ctx->next; | |
467 | |
468 ctx->handler(ctx); | |
469 | |
470 ctx = next; | |
471 } while (ctx); | |
472 | |
473 if (addrs) { | |
474 ngx_resolver_free(r, addrs); | |
475 } | |
476 | |
477 return NGX_OK; | |
478 } | |
479 | |
480 /* NGX_RESOLVE_CNAME */ | |
481 | |
1969 | 482 if (ctx->recursion++ < NGX_RESOLVER_MAX_RECURSION) { |
483 | |
484 ctx->name.len = rn->cnlen; | |
485 ctx->name.data = rn->u.cname; | |
486 | |
487 return ngx_resolve_name_locked(r, ctx); | |
488 } | |
489 | |
490 ctx->next = rn->waiting; | |
491 rn->waiting = NULL; | |
492 | |
493 /* unlock name mutex */ | |
494 | |
495 do { | |
496 ctx->state = NGX_RESOLVE_NXDOMAIN; | |
497 next = ctx->next; | |
498 | |
499 ctx->handler(ctx); | |
500 | |
501 ctx = next; | |
502 } while (ctx); | |
503 | |
504 return NGX_OK; | |
1649 | 505 } |
506 | |
507 if (rn->waiting) { | |
508 | |
509 ctx->next = rn->waiting; | |
510 rn->waiting = ctx; | |
3297 | 511 ctx->state = NGX_AGAIN; |
1649 | 512 |
513 return NGX_AGAIN; | |
514 } | |
515 | |
516 ngx_queue_remove(&rn->queue); | |
517 | |
518 /* lock alloc mutex */ | |
519 | |
520 ngx_resolver_free_locked(r, rn->query); | |
1960
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
521 rn->query = NULL; |
1649 | 522 |
523 if (rn->cnlen) { | |
524 ngx_resolver_free_locked(r, rn->u.cname); | |
525 } | |
526 | |
527 if (rn->naddrs > 1) { | |
528 ngx_resolver_free_locked(r, rn->u.addrs); | |
529 } | |
530 | |
531 /* unlock alloc mutex */ | |
532 | |
533 } else { | |
534 | |
535 rn = ngx_resolver_alloc(r, sizeof(ngx_resolver_node_t)); | |
536 if (rn == NULL) { | |
537 return NGX_ERROR; | |
538 } | |
539 | |
540 rn->name = ngx_resolver_dup(r, ctx->name.data, ctx->name.len); | |
541 if (rn->name == NULL) { | |
542 ngx_resolver_free(r, rn); | |
543 return NGX_ERROR; | |
544 } | |
545 | |
546 rn->node.key = hash; | |
547 rn->nlen = (u_short) ctx->name.len; | |
1960
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
548 rn->query = NULL; |
1649 | 549 |
550 ngx_rbtree_insert(&r->name_rbtree, &rn->node); | |
551 } | |
552 | |
1961
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
553 rc = ngx_resolver_create_name_query(rn, ctx); |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
554 |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
555 if (rc == NGX_ERROR) { |
1649 | 556 goto failed; |
557 } | |
558 | |
1961
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
559 if (rc == NGX_DECLINED) { |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
560 ngx_rbtree_delete(&r->name_rbtree, &rn->node); |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
561 |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
562 ngx_resolver_free(r, rn->query); |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
563 ngx_resolver_free(r, rn->name); |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
564 ngx_resolver_free(r, rn); |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
565 |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
566 ctx->state = NGX_RESOLVE_NXDOMAIN; |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
567 ctx->handler(ctx); |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
568 |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
569 return NGX_OK; |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
570 } |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
571 |
1649 | 572 if (ngx_resolver_send_query(r, rn) != NGX_OK) { |
573 goto failed; | |
574 } | |
575 | |
576 if (ctx->event == NULL) { | |
577 ctx->event = ngx_resolver_calloc(r, sizeof(ngx_event_t)); | |
578 if (ctx->event == NULL) { | |
579 goto failed; | |
580 } | |
581 | |
582 ctx->event->handler = ngx_resolver_timeout_handler; | |
583 ctx->event->data = ctx; | |
584 ctx->event->log = r->log; | |
585 ctx->ident = -1; | |
586 | |
587 ngx_add_timer(ctx->event, ctx->timeout); | |
588 } | |
589 | |
590 if (ngx_queue_empty(&r->name_resend_queue)) { | |
591 ngx_add_timer(r->event, (ngx_msec_t) (r->resend_timeout * 1000)); | |
592 } | |
593 | |
594 rn->expire = ngx_time() + r->resend_timeout; | |
595 | |
596 ngx_queue_insert_head(&r->name_resend_queue, &rn->queue); | |
597 | |
598 rn->cnlen = 0; | |
599 rn->naddrs = 0; | |
600 rn->valid = 0; | |
601 rn->waiting = ctx; | |
602 | |
603 ctx->state = NGX_AGAIN; | |
604 | |
605 return NGX_AGAIN; | |
606 | |
607 failed: | |
608 | |
609 ngx_rbtree_delete(&r->name_rbtree, &rn->node); | |
610 | |
1960
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
611 if (rn->query) { |
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
612 ngx_resolver_free(r, rn->query); |
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
613 } |
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
614 |
1649 | 615 ngx_resolver_free(r, rn->name); |
616 | |
617 ngx_resolver_free(r, rn); | |
618 | |
619 return NGX_ERROR; | |
620 } | |
583 | 621 |
622 | |
623 ngx_int_t | |
1649 | 624 ngx_resolve_addr(ngx_resolver_ctx_t *ctx) |
625 { | |
2484
cf3cd450049c
store name pointer in variable allocated on stack
Igor Sysoev <igor@sysoev.ru>
parents:
2483
diff
changeset
|
626 u_char *name; |
1649 | 627 ngx_resolver_t *r; |
628 ngx_resolver_node_t *rn; | |
629 | |
630 r = ctx->resolver; | |
631 | |
632 ctx->addr = ntohl(ctx->addr); | |
633 | |
634 /* lock addr mutex */ | |
635 | |
636 rn = ngx_resolver_lookup_addr(r, ctx->addr); | |
637 | |
638 if (rn) { | |
639 | |
640 if (rn->valid >= ngx_time()) { | |
641 | |
642 ngx_log_debug0(NGX_LOG_DEBUG_CORE, r->log, 0, "resolve cached"); | |
643 | |
644 ngx_queue_remove(&rn->queue); | |
645 | |
646 rn->expire = ngx_time() + r->expire; | |
647 | |
648 ngx_queue_insert_head(&r->addr_expire_queue, &rn->queue); | |
649 | |
2484
cf3cd450049c
store name pointer in variable allocated on stack
Igor Sysoev <igor@sysoev.ru>
parents:
2483
diff
changeset
|
650 name = ngx_resolver_dup(r, rn->name, rn->nlen); |
cf3cd450049c
store name pointer in variable allocated on stack
Igor Sysoev <igor@sysoev.ru>
parents:
2483
diff
changeset
|
651 if (name == NULL) { |
1649 | 652 goto failed; |
653 } | |
654 | |
2484
cf3cd450049c
store name pointer in variable allocated on stack
Igor Sysoev <igor@sysoev.ru>
parents:
2483
diff
changeset
|
655 ctx->name.len = rn->nlen; |
cf3cd450049c
store name pointer in variable allocated on stack
Igor Sysoev <igor@sysoev.ru>
parents:
2483
diff
changeset
|
656 ctx->name.data = name; |
cf3cd450049c
store name pointer in variable allocated on stack
Igor Sysoev <igor@sysoev.ru>
parents:
2483
diff
changeset
|
657 |
1649 | 658 /* unlock addr mutex */ |
659 | |
660 ctx->state = NGX_OK; | |
661 | |
662 ctx->handler(ctx); | |
663 | |
2484
cf3cd450049c
store name pointer in variable allocated on stack
Igor Sysoev <igor@sysoev.ru>
parents:
2483
diff
changeset
|
664 ngx_resolver_free(r, name); |
1649 | 665 |
666 return NGX_OK; | |
667 } | |
668 | |
669 if (rn->waiting) { | |
670 | |
671 ctx->next = rn->waiting; | |
672 rn->waiting = ctx; | |
3297 | 673 ctx->state = NGX_AGAIN; |
1649 | 674 |
2487
9b4dce95c744
fix return code, this fixes segfault when two or more
Igor Sysoev <igor@sysoev.ru>
parents:
2486
diff
changeset
|
675 /* unlock addr mutex */ |
9b4dce95c744
fix return code, this fixes segfault when two or more
Igor Sysoev <igor@sysoev.ru>
parents:
2486
diff
changeset
|
676 |
9b4dce95c744
fix return code, this fixes segfault when two or more
Igor Sysoev <igor@sysoev.ru>
parents:
2486
diff
changeset
|
677 return NGX_OK; |
1649 | 678 } |
679 | |
680 ngx_queue_remove(&rn->queue); | |
681 | |
682 ngx_resolver_free(r, rn->query); | |
1960
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
683 rn->query = NULL; |
1649 | 684 |
685 } else { | |
686 rn = ngx_resolver_alloc(r, sizeof(ngx_resolver_node_t)); | |
687 if (rn == NULL) { | |
688 goto failed; | |
689 } | |
690 | |
691 rn->node.key = ctx->addr; | |
1960
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
692 rn->query = NULL; |
1649 | 693 |
694 ngx_rbtree_insert(&r->addr_rbtree, &rn->node); | |
695 } | |
696 | |
697 if (ngx_resolver_create_addr_query(rn, ctx) != NGX_OK) { | |
698 goto failed; | |
699 } | |
700 | |
701 if (ngx_resolver_send_query(r, rn) != NGX_OK) { | |
702 goto failed; | |
703 } | |
704 | |
705 ctx->event = ngx_resolver_calloc(r, sizeof(ngx_event_t)); | |
706 if (ctx->event == NULL) { | |
707 goto failed; | |
708 } | |
709 | |
710 ctx->event->handler = ngx_resolver_timeout_handler; | |
711 ctx->event->data = ctx; | |
712 ctx->event->log = r->log; | |
713 ctx->ident = -1; | |
714 | |
715 ngx_add_timer(ctx->event, ctx->timeout); | |
716 | |
717 if (ngx_queue_empty(&r->addr_resend_queue)) { | |
718 ngx_add_timer(r->event, (ngx_msec_t) (r->resend_timeout * 1000)); | |
719 } | |
720 | |
721 rn->expire = ngx_time() + r->resend_timeout; | |
722 | |
723 ngx_queue_insert_head(&r->addr_resend_queue, &rn->queue); | |
724 | |
725 rn->cnlen = 0; | |
726 rn->naddrs = 0; | |
727 rn->name = NULL; | |
728 rn->nlen = 0; | |
729 rn->valid = 0; | |
730 rn->waiting = ctx; | |
731 | |
732 /* unlock addr mutex */ | |
733 | |
734 ctx->state = NGX_AGAIN; | |
735 | |
736 return NGX_OK; | |
737 | |
738 failed: | |
739 | |
740 if (rn) { | |
741 ngx_rbtree_delete(&r->addr_rbtree, &rn->node); | |
742 | |
1960
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
743 if (rn->query) { |
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
744 ngx_resolver_free(r, rn->query); |
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
745 } |
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
746 |
1649 | 747 ngx_resolver_free(r, rn); |
748 } | |
749 | |
750 /* unlock addr mutex */ | |
751 | |
752 if (ctx->event) { | |
1904
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
753 ngx_resolver_free(r, ctx->event); |
1649 | 754 } |
755 | |
1904
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
756 ngx_resolver_free(r, ctx); |
1649 | 757 |
758 return NGX_ERROR; | |
759 } | |
760 | |
761 | |
762 void | |
763 ngx_resolve_addr_done(ngx_resolver_ctx_t *ctx) | |
764 { | |
765 in_addr_t addr; | |
766 ngx_resolver_t *r; | |
767 ngx_resolver_ctx_t *w, **p; | |
768 ngx_resolver_node_t *rn; | |
769 | |
770 r = ctx->resolver; | |
771 | |
772 ngx_log_debug1(NGX_LOG_DEBUG_CORE, r->log, 0, | |
773 "resolve addr done: %i", ctx->state); | |
774 | |
775 if (ctx->event && ctx->event->timer_set) { | |
776 ngx_del_timer(ctx->event); | |
777 } | |
778 | |
779 /* lock addr mutex */ | |
780 | |
781 if (ctx->state == NGX_AGAIN || ctx->state == NGX_RESOLVE_TIMEDOUT) { | |
782 | |
783 rn = ngx_resolver_lookup_addr(r, ctx->addr); | |
784 | |
785 if (rn) { | |
786 p = &rn->waiting; | |
787 w = rn->waiting; | |
788 | |
789 while (w) { | |
790 if (w == ctx) { | |
791 *p = w->next; | |
792 | |
793 goto done; | |
794 } | |
795 | |
796 p = &w->next; | |
797 w = w->next; | |
798 } | |
799 } | |
800 | |
801 addr = ntohl(ctx->addr); | |
802 | |
803 ngx_log_error(NGX_LOG_ALERT, r->log, 0, | |
804 "could not cancel %ud.%ud.%ud.%ud resolving", | |
805 (addr >> 24) & 0xff, (addr >> 16) & 0xff, | |
806 (addr >> 8) & 0xff, addr & 0xff); | |
807 } | |
808 | |
809 done: | |
810 | |
811 ngx_resolver_expire(r, &r->addr_rbtree, &r->addr_expire_queue); | |
812 | |
813 /* unlock addr mutex */ | |
814 | |
1904
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
815 /* lock alloc mutex */ |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
816 |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
817 if (ctx->event) { |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
818 ngx_resolver_free_locked(r, ctx->event); |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
819 } |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
820 |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
821 ngx_resolver_free_locked(r, ctx); |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
822 |
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
823 /* unlock alloc mutex */ |
1649 | 824 } |
825 | |
826 | |
827 static void | |
828 ngx_resolver_expire(ngx_resolver_t *r, ngx_rbtree_t *tree, ngx_queue_t *queue) | |
829 { | |
830 time_t now; | |
831 ngx_uint_t i; | |
832 ngx_queue_t *q; | |
833 ngx_resolver_node_t *rn; | |
834 | |
835 ngx_log_debug0(NGX_LOG_DEBUG_CORE, r->log, 0, "resolver expire"); | |
836 | |
837 now = ngx_time(); | |
838 | |
839 for (i = 0; i < 2; i++) { | |
840 if (ngx_queue_empty(queue)) { | |
841 return; | |
842 } | |
843 | |
844 q = ngx_queue_last(queue); | |
845 | |
846 rn = ngx_queue_data(q, ngx_resolver_node_t, queue); | |
847 | |
848 if (now <= rn->expire) { | |
849 return; | |
850 } | |
851 | |
1774 | 852 ngx_log_debug2(NGX_LOG_DEBUG_CORE, r->log, 0, |
853 "resolver expire \"%*s\"", (size_t) rn->nlen, rn->name); | |
1649 | 854 |
855 ngx_queue_remove(q); | |
856 | |
857 ngx_rbtree_delete(tree, &rn->node); | |
858 | |
859 ngx_resolver_free_node(r, rn); | |
860 } | |
861 } | |
862 | |
863 | |
864 static ngx_int_t | |
865 ngx_resolver_send_query(ngx_resolver_t *r, ngx_resolver_node_t *rn) | |
866 { | |
867 ssize_t n; | |
868 ngx_udp_connection_t *uc; | |
869 | |
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
870 uc = r->udp_connections.elts; |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
871 |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
872 uc = &uc[r->last_connection++]; |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
873 if (r->last_connection == r->udp_connections.nelts) { |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
874 r->last_connection = 0; |
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
875 } |
1649 | 876 |
877 if (uc->connection == NULL) { | |
878 if (ngx_udp_connect(uc) != NGX_OK) { | |
879 return NGX_ERROR; | |
880 } | |
881 | |
882 uc->connection->data = r; | |
883 uc->connection->read->handler = ngx_resolver_read_response; | |
1906 | 884 uc->connection->read->resolver = 1; |
1649 | 885 } |
886 | |
887 n = ngx_send(uc->connection, rn->query, rn->qlen); | |
888 | |
889 if (n == -1) { | |
890 return NGX_ERROR; | |
891 } | |
892 | |
893 if ((size_t) n != (size_t) rn->qlen) { | |
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
894 ngx_log_error(NGX_LOG_CRIT, &uc->log, 0, "send() incomplete"); |
1649 | 895 return NGX_ERROR; |
896 } | |
897 | |
898 return NGX_OK; | |
899 } | |
900 | |
901 | |
902 static void | |
903 ngx_resolver_resend_handler(ngx_event_t *ev) | |
904 { | |
905 time_t timer, atimer, ntimer; | |
906 ngx_resolver_t *r; | |
907 | |
908 r = ev->data; | |
909 | |
910 ngx_log_debug0(NGX_LOG_DEBUG_CORE, r->log, 0, | |
911 "resolver resend handler"); | |
912 | |
913 /* lock name mutex */ | |
914 | |
915 ntimer = ngx_resolver_resend(r, &r->name_rbtree, &r->name_resend_queue); | |
916 | |
917 /* unlock name mutex */ | |
918 | |
919 /* lock addr mutex */ | |
920 | |
921 atimer = ngx_resolver_resend(r, &r->addr_rbtree, &r->addr_resend_queue); | |
1679
ca317d9b5c09
style fix: remove trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1649
diff
changeset
|
922 |
1649 | 923 /* unlock addr mutex */ |
924 | |
925 if (ntimer == 0) { | |
926 timer = atimer; | |
927 | |
928 } else if (atimer == 0) { | |
929 timer = ntimer; | |
930 | |
931 } else { | |
932 timer = (atimer < ntimer) ? atimer : ntimer; | |
933 } | |
934 | |
935 if (timer) { | |
936 ngx_add_timer(r->event, (ngx_msec_t) (timer * 1000)); | |
937 } | |
938 } | |
939 | |
940 | |
941 static time_t | |
942 ngx_resolver_resend(ngx_resolver_t *r, ngx_rbtree_t *tree, ngx_queue_t *queue) | |
943 { | |
944 time_t now; | |
945 ngx_queue_t *q; | |
946 ngx_resolver_node_t *rn; | |
947 | |
948 now = ngx_time(); | |
949 | |
950 for ( ;; ) { | |
951 if (ngx_queue_empty(queue)) { | |
952 return 0; | |
953 } | |
954 | |
955 q = ngx_queue_last(queue); | |
956 | |
957 rn = ngx_queue_data(q, ngx_resolver_node_t, queue); | |
958 | |
959 if (now < rn->expire) { | |
960 return rn->expire - now; | |
961 } | |
962 | |
1774 | 963 ngx_log_debug3(NGX_LOG_DEBUG_CORE, r->log, 0, |
964 "resolver resend \"%*s\" %p", | |
965 (size_t) rn->nlen, rn->name, rn->waiting); | |
1649 | 966 |
967 ngx_queue_remove(q); | |
968 | |
969 if (rn->waiting) { | |
970 | |
971 if (ngx_resolver_send_query(r, rn) == NGX_OK) { | |
972 | |
973 rn->expire = now + r->resend_timeout; | |
974 | |
975 ngx_queue_insert_head(queue, &rn->queue); | |
976 } | |
1879
cf4ee321d195
do not delete failed DNS request if there are waiting clients
Igor Sysoev <igor@sysoev.ru>
parents:
1878
diff
changeset
|
977 |
cf4ee321d195
do not delete failed DNS request if there are waiting clients
Igor Sysoev <igor@sysoev.ru>
parents:
1878
diff
changeset
|
978 continue; |
1649 | 979 } |
980 | |
981 ngx_rbtree_delete(tree, &rn->node); | |
982 | |
983 ngx_resolver_free_node(r, rn); | |
984 } | |
985 } | |
986 | |
987 | |
988 static void | |
989 ngx_resolver_read_response(ngx_event_t *rev) | |
990 { | |
991 ssize_t n; | |
992 ngx_connection_t *c; | |
993 u_char buf[NGX_RESOLVER_UDP_SIZE]; | |
994 | |
995 c = rev->data; | |
996 | |
997 do { | |
1689 | 998 n = ngx_udp_recv(c, buf, NGX_RESOLVER_UDP_SIZE); |
999 | |
1000 if (n < 0) { | |
1649 | 1001 return; |
1002 } | |
1003 | |
1004 ngx_resolver_process_response(c->data, buf, n); | |
1005 | |
1006 } while (rev->ready); | |
1007 } | |
1008 | |
1009 | |
1010 static void | |
1011 ngx_resolver_process_response(ngx_resolver_t *r, u_char *buf, size_t n) | |
1012 { | |
1013 char *err; | |
1014 size_t len; | |
2282
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1015 ngx_uint_t i, times, ident, qident, flags, code, nqs, nan, |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1016 qtype, qclass; |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1017 ngx_queue_t *q; |
1649 | 1018 ngx_resolver_qs_t *qs; |
2282
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1019 ngx_resolver_node_t *rn; |
1649 | 1020 ngx_resolver_query_t *query; |
1021 | |
2281
5004229420a6
FORMERR DNS response may be equal to mininal query size
Igor Sysoev <igor@sysoev.ru>
parents:
2006
diff
changeset
|
1022 if ((size_t) n < sizeof(ngx_resolver_query_t)) { |
1649 | 1023 goto short_response; |
1024 } | |
1025 | |
1026 query = (ngx_resolver_query_t *) buf; | |
1027 | |
1028 ident = (query->ident_hi << 8) + query->ident_lo; | |
1029 flags = (query->flags_hi << 8) + query->flags_lo; | |
1030 nqs = (query->nqs_hi << 8) + query->nqs_lo; | |
1031 nan = (query->nan_hi << 8) + query->nan_lo; | |
1032 | |
1033 ngx_log_debug6(NGX_LOG_DEBUG_CORE, r->log, 0, | |
1967
4a4b15c9c474
use correct ngx_sprintf() formats
Igor Sysoev <igor@sysoev.ru>
parents:
1966
diff
changeset
|
1034 "resolver DNS response %ui fl:%04Xui %ui/%ui/%ui/%ui", |
1649 | 1035 ident, flags, nqs, nan, |
1036 (query->nns_hi << 8) + query->nns_lo, | |
1037 (query->nar_hi << 8) + query->nar_lo); | |
1038 | |
1039 if (!(flags & 0x8000)) { | |
1040 ngx_log_error(r->log_level, r->log, 0, | |
1967
4a4b15c9c474
use correct ngx_sprintf() formats
Igor Sysoev <igor@sysoev.ru>
parents:
1966
diff
changeset
|
1041 "invalid DNS response %ui fl:%04Xui", ident, flags); |
1649 | 1042 return; |
1043 } | |
1044 | |
1045 code = flags & 0x7f; | |
1046 | |
2282
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1047 if (code == NGX_RESOLVE_FORMERR) { |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1048 |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1049 times = 0; |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1050 |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1051 for (q = ngx_queue_head(&r->name_resend_queue); |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1052 q != ngx_queue_sentinel(&r->name_resend_queue) || times++ < 100; |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1053 q = ngx_queue_next(q)) |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1054 { |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1055 rn = ngx_queue_data(q, ngx_resolver_node_t, queue); |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1056 qident = (rn->query[0] << 8) + rn->query[1]; |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1057 |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1058 if (qident == ident) { |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1059 ngx_log_error(r->log_level, r->log, 0, |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1060 "DNS error (%ui: %s), query id:%ui, name:\"%*s\"", |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1061 code, ngx_resolver_strerror(code), ident, |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1062 rn->nlen, rn->name); |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1063 return; |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1064 } |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1065 } |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1066 |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1067 goto dns_error; |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1068 } |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1069 |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1070 if (code > NGX_RESOLVE_REFUSED) { |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1071 goto dns_error; |
1649 | 1072 } |
1073 | |
1074 if (nqs != 1) { | |
1075 err = "invalid number of questions in DNS response"; | |
1076 goto done; | |
1077 } | |
1078 | |
1079 i = sizeof(ngx_resolver_query_t); | |
1080 | |
1081 while (i < (ngx_uint_t) n) { | |
1082 if (buf[i] == '\0') { | |
1083 goto found; | |
1084 } | |
1085 | |
1086 len = buf[i]; | |
1087 i += 1 + len; | |
1088 } | |
1089 | |
1090 goto short_response; | |
1091 | |
1092 found: | |
1093 | |
1094 if (i++ == 0) { | |
1095 err = "zero-length domain name in DNS response"; | |
1096 goto done; | |
1097 } | |
1098 | |
1099 if (i + sizeof(ngx_resolver_qs_t) + nan * (2 + sizeof(ngx_resolver_an_t)) | |
1100 > (ngx_uint_t) n) | |
1101 { | |
1102 goto short_response; | |
1103 } | |
1104 | |
1105 qs = (ngx_resolver_qs_t *) &buf[i]; | |
1106 | |
1107 qtype = (qs->type_hi << 8) + qs->type_lo; | |
1108 qclass = (qs->class_hi << 8) + qs->class_lo; | |
1109 | |
1110 ngx_log_debug2(NGX_LOG_DEBUG_CORE, r->log, 0, | |
1967
4a4b15c9c474
use correct ngx_sprintf() formats
Igor Sysoev <igor@sysoev.ru>
parents:
1966
diff
changeset
|
1111 "resolver DNS response qt:%ui cl:%ui", qtype, qclass); |
1649 | 1112 |
1113 if (qclass != 1) { | |
1114 ngx_log_error(r->log_level, r->log, 0, | |
1967
4a4b15c9c474
use correct ngx_sprintf() formats
Igor Sysoev <igor@sysoev.ru>
parents:
1966
diff
changeset
|
1115 "unknown query class %ui in DNS response", qclass); |
1649 | 1116 return; |
1117 } | |
1118 | |
1119 switch (qtype) { | |
1120 | |
1121 case NGX_RESOLVE_A: | |
1122 | |
1123 ngx_resolver_process_a(r, buf, n, ident, code, nan, | |
1742
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1124 i + sizeof(ngx_resolver_qs_t)); |
1649 | 1125 |
1126 break; | |
1127 | |
1128 case NGX_RESOLVE_PTR: | |
1129 | |
1742
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1130 ngx_resolver_process_ptr(r, buf, n, ident, code, nan); |
1649 | 1131 |
1132 break; | |
1133 | |
1134 default: | |
1135 ngx_log_error(r->log_level, r->log, 0, | |
1967
4a4b15c9c474
use correct ngx_sprintf() formats
Igor Sysoev <igor@sysoev.ru>
parents:
1966
diff
changeset
|
1136 "unknown query type %ui in DNS response", qtype); |
1649 | 1137 return; |
1138 } | |
1139 | |
1140 return; | |
1141 | |
1142 short_response: | |
1143 | |
1144 err = "short dns response"; | |
1145 | |
1146 done: | |
1147 | |
1148 ngx_log_error(r->log_level, r->log, 0, err); | |
1149 | |
1150 return; | |
2282
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1151 |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1152 dns_error: |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1153 |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1154 ngx_log_error(r->log_level, r->log, 0, |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1155 "DNS error (%ui: %s), query id:%ui", |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1156 code, ngx_resolver_strerror(code), ident); |
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1157 return; |
1649 | 1158 } |
1159 | |
1160 | |
1161 static void | |
1162 ngx_resolver_process_a(ngx_resolver_t *r, u_char *buf, size_t last, | |
1163 ngx_uint_t ident, ngx_uint_t code, ngx_uint_t nan, ngx_uint_t ans) | |
583 | 1164 { |
1649 | 1165 char *err; |
1166 u_char *cname; | |
1167 size_t len; | |
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1168 int32_t ttl; |
1649 | 1169 uint32_t hash; |
1170 in_addr_t addr, *addrs; | |
1171 ngx_str_t name; | |
1172 ngx_uint_t qtype, qident, naddrs, a, i, n, start; | |
1173 ngx_resolver_an_t *an; | |
1174 ngx_resolver_ctx_t *ctx, *next; | |
1175 ngx_resolver_node_t *rn; | |
1176 | |
1177 if (ngx_resolver_copy(r, &name, buf, &buf[12], &buf[last]) != NGX_OK) { | |
1178 return; | |
1179 } | |
1180 | |
1181 ngx_log_debug1(NGX_LOG_DEBUG_CORE, r->log, 0, "resolver qs:%V", &name); | |
1182 | |
1183 hash = ngx_crc32_short(name.data, name.len); | |
1184 | |
1185 /* lock name mutex */ | |
1186 | |
1187 rn = ngx_resolver_lookup_name(r, &name, hash); | |
1188 | |
1189 if (rn == NULL || rn->query == NULL) { | |
1190 ngx_log_error(r->log_level, r->log, 0, | |
1191 "unexpected response for %V", &name); | |
1192 goto failed; | |
1193 } | |
1194 | |
1195 qident = (rn->query[0] << 8) + rn->query[1]; | |
1196 | |
1197 if (ident != qident) { | |
1198 ngx_log_error(r->log_level, r->log, 0, | |
1967
4a4b15c9c474
use correct ngx_sprintf() formats
Igor Sysoev <igor@sysoev.ru>
parents:
1966
diff
changeset
|
1199 "wrong ident %ui response for %V, expect %ui", |
1649 | 1200 ident, &name, qident); |
1201 goto failed; | |
1202 } | |
1203 | |
3139 | 1204 ngx_resolver_free(r, name.data); |
1205 | |
1742
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1206 if (code == 0 && nan == 0) { |
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1207 code = 3; /* NXDOMAIN */ |
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1208 } |
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1209 |
1649 | 1210 if (code) { |
1211 next = rn->waiting; | |
1212 rn->waiting = NULL; | |
1213 | |
1214 ngx_queue_remove(&rn->queue); | |
1215 | |
1216 ngx_rbtree_delete(&r->name_rbtree, &rn->node); | |
1217 | |
1218 ngx_resolver_free_node(r, rn); | |
1219 | |
1220 /* unlock name mutex */ | |
1221 | |
1222 while (next) { | |
1223 ctx = next; | |
1224 ctx->state = code; | |
1225 next = ctx->next; | |
1226 | |
1227 ctx->handler(ctx); | |
1228 } | |
1229 | |
1230 return; | |
1231 } | |
1232 | |
1233 i = ans; | |
1234 naddrs = 0; | |
1235 addr = 0; | |
1236 addrs = NULL; | |
1237 cname = NULL; | |
1238 qtype = 0; | |
4296
783fd9c38d98
Silenced a warning for some compilers.
Ruslan Ermilov <ru@nginx.com>
parents:
4295
diff
changeset
|
1239 ttl = 0; |
1649 | 1240 |
1241 for (a = 0; a < nan; a++) { | |
1242 | |
1243 start = i; | |
1244 | |
1245 while (i < last) { | |
1246 | |
1247 if (buf[i] & 0xc0) { | |
1248 i += 2; | |
1249 goto found; | |
1250 } | |
1251 | |
1252 if (buf[i] == 0) { | |
1253 i++; | |
1254 goto test_length; | |
1255 } | |
1256 | |
1257 i += 1 + buf[i]; | |
1258 } | |
1259 | |
1260 goto short_response; | |
1261 | |
1262 test_length: | |
1263 | |
1264 if (i - start < 2) { | |
1265 err = "invalid name in dns response"; | |
1266 goto invalid; | |
1267 } | |
1268 | |
1269 found: | |
1270 | |
1271 if (i + sizeof(ngx_resolver_an_t) >= last) { | |
1272 goto short_response; | |
1273 } | |
1274 | |
1275 an = (ngx_resolver_an_t *) &buf[i]; | |
1276 | |
1277 qtype = (an->type_hi << 8) + an->type_lo; | |
1278 len = (an->len_hi << 8) + an->len_lo; | |
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1279 ttl = (an->ttl[0] << 24) + (an->ttl[1] << 16) |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1280 + (an->ttl[2] << 8) + (an->ttl[3]); |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1281 |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1282 if (ttl < 0) { |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1283 ttl = 0; |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1284 } |
1649 | 1285 |
1286 if (qtype == NGX_RESOLVE_A) { | |
1287 | |
1288 i += sizeof(ngx_resolver_an_t); | |
1289 | |
1290 if (i + len > last) { | |
1291 goto short_response; | |
1292 } | |
1293 | |
1294 addr = htonl((buf[i] << 24) + (buf[i + 1] << 16) | |
1295 + (buf[i + 2] << 8) + (buf[i + 3])); | |
1296 | |
1297 naddrs++; | |
1298 | |
1299 i += len; | |
1300 | |
1301 } else if (qtype == NGX_RESOLVE_CNAME) { | |
1302 cname = &buf[i] + sizeof(ngx_resolver_an_t); | |
1303 i += sizeof(ngx_resolver_an_t) + len; | |
1965 | 1304 |
1305 } else if (qtype == NGX_RESOLVE_DNAME) { | |
1306 i += sizeof(ngx_resolver_an_t) + len; | |
1966 | 1307 |
1308 } else { | |
1309 ngx_log_error(r->log_level, r->log, 0, | |
1310 "unexpected qtype %ui", qtype); | |
1649 | 1311 } |
1312 } | |
1313 | |
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1314 ngx_log_debug3(NGX_LOG_DEBUG_CORE, r->log, 0, |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1315 "resolver naddrs:%ui cname:%p ttl:%d", |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1316 naddrs, cname, ttl); |
1649 | 1317 |
1318 if (naddrs) { | |
1319 | |
1320 if (naddrs == 1) { | |
1321 rn->u.addr = addr; | |
1322 | |
1323 } else { | |
1324 | |
1325 addrs = ngx_resolver_alloc(r, naddrs * sizeof(in_addr_t)); | |
1326 if (addrs == NULL) { | |
1327 return; | |
1328 } | |
1329 | |
1330 n = 0; | |
1331 i = ans; | |
1332 | |
1333 for (a = 0; a < nan; a++) { | |
1334 | |
1335 for ( ;; ) { | |
1336 | |
1337 if (buf[i] & 0xc0) { | |
1338 i += 2; | |
1339 goto ok; | |
1340 } | |
1341 | |
1342 if (buf[i] == 0) { | |
1343 i++; | |
1344 goto ok; | |
1345 } | |
1346 | |
1347 i += 1 + buf[i]; | |
1348 } | |
1349 | |
1350 ok: | |
1351 | |
1352 an = (ngx_resolver_an_t *) &buf[i]; | |
1353 | |
1354 qtype = (an->type_hi << 8) + an->type_lo; | |
1355 len = (an->len_hi << 8) + an->len_lo; | |
1356 | |
1357 i += sizeof(ngx_resolver_an_t); | |
1358 | |
1359 if (qtype == NGX_RESOLVE_A) { | |
1360 | |
1361 addrs[n++] = htonl((buf[i] << 24) + (buf[i + 1] << 16) | |
1362 + (buf[i + 2] << 8) + (buf[i + 3])); | |
1363 | |
1364 if (n == naddrs) { | |
1365 break; | |
1366 } | |
1367 } | |
1368 | |
1369 i += len; | |
1370 } | |
1371 | |
1372 rn->u.addrs = addrs; | |
1373 | |
1374 addrs = ngx_resolver_dup(r, rn->u.addrs, | |
1375 naddrs * sizeof(in_addr_t)); | |
1376 if (addrs == NULL) { | |
1377 return; | |
1378 } | |
1379 } | |
1380 | |
1381 rn->naddrs = (u_short) naddrs; | |
1382 | |
1383 ngx_queue_remove(&rn->queue); | |
1384 | |
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1385 rn->valid = ngx_time() + (r->valid ? r->valid : ttl); |
1649 | 1386 rn->expire = ngx_time() + r->expire; |
1387 | |
1388 ngx_queue_insert_head(&r->name_expire_queue, &rn->queue); | |
1389 | |
1390 next = rn->waiting; | |
1391 rn->waiting = NULL; | |
1392 | |
1393 /* unlock name mutex */ | |
1394 | |
1395 while (next) { | |
1396 ctx = next; | |
1397 ctx->state = NGX_OK; | |
1398 ctx->naddrs = naddrs; | |
1399 ctx->addrs = (naddrs == 1) ? &ctx->addr : addrs; | |
1400 ctx->addr = addr; | |
1401 next = ctx->next; | |
1402 | |
1403 ctx->handler(ctx); | |
1404 } | |
1405 | |
2483
29494780d978
free addrs only it has been allocated before: non single address
Igor Sysoev <igor@sysoev.ru>
parents:
2482
diff
changeset
|
1406 if (naddrs > 1) { |
1649 | 1407 ngx_resolver_free(r, addrs); |
1408 } | |
1409 | |
1410 return; | |
1411 | |
1412 } else if (cname) { | |
1413 | |
1414 /* CNAME only */ | |
1415 | |
1416 if (ngx_resolver_copy(r, &name, buf, cname, &buf[last]) != NGX_OK) { | |
1417 return; | |
1418 } | |
1419 | |
1420 ngx_log_debug1(NGX_LOG_DEBUG_CORE, r->log, 0, | |
1421 "resolver cname:\"%V\"", &name); | |
1422 | |
1741
0829024c924d
fix segfault if response will have CNAME only
Igor Sysoev <igor@sysoev.ru>
parents:
1689
diff
changeset
|
1423 ngx_queue_remove(&rn->queue); |
0829024c924d
fix segfault if response will have CNAME only
Igor Sysoev <igor@sysoev.ru>
parents:
1689
diff
changeset
|
1424 |
1649 | 1425 rn->cnlen = (u_short) name.len; |
1426 rn->u.cname = name.data; | |
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1427 |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1428 rn->valid = ngx_time() + (r->valid ? r->valid : ttl); |
1649 | 1429 rn->expire = ngx_time() + r->expire; |
1430 | |
1431 ngx_queue_insert_head(&r->name_expire_queue, &rn->queue); | |
1432 | |
1433 ctx = rn->waiting; | |
1434 rn->waiting = NULL; | |
1435 | |
1436 if (ctx) { | |
1437 ctx->name = name; | |
1438 | |
1439 (void) ngx_resolve_name_locked(r, ctx); | |
1440 } | |
1441 | |
1442 return; | |
1443 } | |
1444 | |
1445 ngx_log_error(r->log_level, r->log, 0, | |
1967
4a4b15c9c474
use correct ngx_sprintf() formats
Igor Sysoev <igor@sysoev.ru>
parents:
1966
diff
changeset
|
1446 "no A or CNAME types in DNS responses, unknown query type: %ui", |
4a4b15c9c474
use correct ngx_sprintf() formats
Igor Sysoev <igor@sysoev.ru>
parents:
1966
diff
changeset
|
1447 qtype); |
1649 | 1448 return; |
1449 | |
1450 short_response: | |
1451 | |
1452 err = "short dns response"; | |
1453 | |
1454 invalid: | |
1455 | |
1456 /* unlock name mutex */ | |
1457 | |
1458 ngx_log_error(r->log_level, r->log, 0, err); | |
1459 | |
1460 return; | |
1461 | |
1462 failed: | |
1463 | |
1464 /* unlock name mutex */ | |
1465 | |
3139 | 1466 ngx_resolver_free(r, name.data); |
1467 | |
1649 | 1468 return; |
1469 } | |
1470 | |
1471 | |
1472 static void | |
1473 ngx_resolver_process_ptr(ngx_resolver_t *r, u_char *buf, size_t n, | |
1742
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1474 ngx_uint_t ident, ngx_uint_t code, ngx_uint_t nan) |
1649 | 1475 { |
1476 char *err; | |
1477 size_t len; | |
1478 in_addr_t addr; | |
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1479 int32_t ttl; |
1649 | 1480 ngx_int_t digit; |
1481 ngx_str_t name; | |
3902
159b58f9c0bd
fix building by gcc 4.6 without --with-debug
Igor Sysoev <igor@sysoev.ru>
parents:
3763
diff
changeset
|
1482 ngx_uint_t i, mask, qident; |
1649 | 1483 ngx_resolver_an_t *an; |
1484 ngx_resolver_ctx_t *ctx, *next; | |
1485 ngx_resolver_node_t *rn; | |
1486 | |
1487 if (ngx_resolver_copy(r, NULL, buf, &buf[12], &buf[n]) != NGX_OK) { | |
1488 goto invalid_in_addr_arpa; | |
1489 } | |
1490 | |
1491 addr = 0; | |
1492 i = 12; | |
1493 | |
1494 for (mask = 0; mask < 32; mask += 8) { | |
1495 len = buf[i++]; | |
1496 | |
1497 digit = ngx_atoi(&buf[i], len); | |
1498 if (digit == NGX_ERROR || digit > 255) { | |
1499 goto invalid_in_addr_arpa; | |
1500 } | |
1501 | |
1502 addr += digit << mask; | |
1503 i += len; | |
1504 } | |
1505 | |
1506 if (ngx_strcmp(&buf[i], "\7in-addr\4arpa") != 0) { | |
1507 goto invalid_in_addr_arpa; | |
1508 } | |
1509 | |
1510 /* lock addr mutex */ | |
1511 | |
1512 rn = ngx_resolver_lookup_addr(r, addr); | |
1513 | |
1514 if (rn == NULL || rn->query == NULL) { | |
1515 ngx_log_error(r->log_level, r->log, 0, | |
1516 "unexpected response for %ud.%ud.%ud.%ud", | |
1517 (addr >> 24) & 0xff, (addr >> 16) & 0xff, | |
1518 (addr >> 8) & 0xff, addr & 0xff); | |
1519 goto failed; | |
1520 } | |
1521 | |
1522 qident = (rn->query[0] << 8) + rn->query[1]; | |
1523 | |
1524 if (ident != qident) { | |
1525 ngx_log_error(r->log_level, r->log, 0, | |
1967
4a4b15c9c474
use correct ngx_sprintf() formats
Igor Sysoev <igor@sysoev.ru>
parents:
1966
diff
changeset
|
1526 "wrong ident %ui response for %ud.%ud.%ud.%ud, expect %ui", |
4a4b15c9c474
use correct ngx_sprintf() formats
Igor Sysoev <igor@sysoev.ru>
parents:
1966
diff
changeset
|
1527 ident, (addr >> 24) & 0xff, (addr >> 16) & 0xff, |
4a4b15c9c474
use correct ngx_sprintf() formats
Igor Sysoev <igor@sysoev.ru>
parents:
1966
diff
changeset
|
1528 (addr >> 8) & 0xff, addr & 0xff, qident); |
1649 | 1529 goto failed; |
1530 } | |
1531 | |
1742
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1532 if (code == 0 && nan == 0) { |
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1533 code = 3; /* NXDOMAIN */ |
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1534 } |
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1535 |
1649 | 1536 if (code) { |
1537 next = rn->waiting; | |
1538 rn->waiting = NULL; | |
1539 | |
1540 ngx_queue_remove(&rn->queue); | |
1541 | |
1542 ngx_rbtree_delete(&r->addr_rbtree, &rn->node); | |
1543 | |
1544 ngx_resolver_free_node(r, rn); | |
1545 | |
1546 /* unlock addr mutex */ | |
1547 | |
1548 while (next) { | |
1549 ctx = next; | |
1550 ctx->state = code; | |
1551 next = ctx->next; | |
1552 | |
1553 ctx->handler(ctx); | |
1554 } | |
1555 | |
1556 return; | |
1557 } | |
1558 | |
1559 i += sizeof("\7in-addr\4arpa") + sizeof(ngx_resolver_qs_t); | |
1560 | |
1561 if (i + 2 + sizeof(ngx_resolver_an_t) > (ngx_uint_t) n) { | |
1562 goto short_response; | |
1563 } | |
1564 | |
1565 /* compression pointer to "XX.XX.XX.XX.in-addr.arpa */ | |
1566 | |
1567 if (buf[i] != 0xc0 || buf[i + 1] != 0x0c) { | |
1568 err = "invalid in-addr.arpa name in DNS response"; | |
1569 goto invalid; | |
1570 } | |
1571 | |
1572 an = (ngx_resolver_an_t *) &buf[i + 2]; | |
1573 | |
1574 len = (an->len_hi << 8) + an->len_lo; | |
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1575 ttl = (an->ttl[0] << 24) + (an->ttl[1] << 16) |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1576 + (an->ttl[2] << 8) + (an->ttl[3]); |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1577 |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1578 if (ttl < 0) { |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1579 ttl = 0; |
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1580 } |
1649 | 1581 |
1582 ngx_log_debug3(NGX_LOG_DEBUG_CORE, r->log, 0, | |
3902
159b58f9c0bd
fix building by gcc 4.6 without --with-debug
Igor Sysoev <igor@sysoev.ru>
parents:
3763
diff
changeset
|
1583 "resolver qt:%ui cl:%ui len:%uz", |
159b58f9c0bd
fix building by gcc 4.6 without --with-debug
Igor Sysoev <igor@sysoev.ru>
parents:
3763
diff
changeset
|
1584 (an->type_hi << 8) + an->type_lo, |
159b58f9c0bd
fix building by gcc 4.6 without --with-debug
Igor Sysoev <igor@sysoev.ru>
parents:
3763
diff
changeset
|
1585 (an->class_hi << 8) + an->class_lo, len); |
1649 | 1586 |
1587 i += 2 + sizeof(ngx_resolver_an_t); | |
1588 | |
1589 if (i + len > (ngx_uint_t) n) { | |
1590 goto short_response; | |
1591 } | |
1592 | |
1593 if (ngx_resolver_copy(r, &name, buf, &buf[i], &buf[n]) != NGX_OK) { | |
1594 return; | |
1595 } | |
1596 | |
1597 ngx_log_debug1(NGX_LOG_DEBUG_CORE, r->log, 0, "resolver an:%V", &name); | |
1598 | |
2486
8de5dc3e7001
use length of uncompressed name
Igor Sysoev <igor@sysoev.ru>
parents:
2484
diff
changeset
|
1599 if (name.len != (size_t) rn->nlen |
8de5dc3e7001
use length of uncompressed name
Igor Sysoev <igor@sysoev.ru>
parents:
2484
diff
changeset
|
1600 || ngx_strncmp(name.data, rn->name, name.len) != 0) |
1649 | 1601 { |
2482
30ec8c5ac75b
fix reverse resolving cache: it stored zero length names
Igor Sysoev <igor@sysoev.ru>
parents:
2314
diff
changeset
|
1602 if (rn->nlen) { |
30ec8c5ac75b
fix reverse resolving cache: it stored zero length names
Igor Sysoev <igor@sysoev.ru>
parents:
2314
diff
changeset
|
1603 ngx_resolver_free(r, rn->name); |
30ec8c5ac75b
fix reverse resolving cache: it stored zero length names
Igor Sysoev <igor@sysoev.ru>
parents:
2314
diff
changeset
|
1604 } |
30ec8c5ac75b
fix reverse resolving cache: it stored zero length names
Igor Sysoev <igor@sysoev.ru>
parents:
2314
diff
changeset
|
1605 |
2490
1c87647b7ca5
fix building by msvc, introduced in r2487
Igor Sysoev <igor@sysoev.ru>
parents:
2487
diff
changeset
|
1606 rn->nlen = (u_short) name.len; |
1649 | 1607 rn->name = name.data; |
1608 | |
2486
8de5dc3e7001
use length of uncompressed name
Igor Sysoev <igor@sysoev.ru>
parents:
2484
diff
changeset
|
1609 name.data = ngx_resolver_dup(r, rn->name, name.len); |
1649 | 1610 if (name.data == NULL) { |
1611 goto failed; | |
1612 } | |
1613 } | |
1614 | |
1615 ngx_queue_remove(&rn->queue); | |
1616 | |
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1617 rn->valid = ngx_time() + (r->valid ? r->valid : ttl); |
1649 | 1618 rn->expire = ngx_time() + r->expire; |
1619 | |
1620 ngx_queue_insert_head(&r->addr_expire_queue, &rn->queue); | |
1621 | |
1622 next = rn->waiting; | |
1623 rn->waiting = NULL; | |
1624 | |
1625 /* unlock addr mutex */ | |
1626 | |
1627 while (next) { | |
1628 ctx = next; | |
1629 ctx->state = NGX_OK; | |
1630 ctx->name = name; | |
1631 next = ctx->next; | |
1632 | |
1633 ctx->handler(ctx); | |
1634 } | |
1635 | |
1636 ngx_resolver_free(r, name.data); | |
1637 | |
1638 return; | |
1639 | |
1640 invalid_in_addr_arpa: | |
1641 | |
1642 ngx_log_error(r->log_level, r->log, 0, | |
1643 "invalid in-addr.arpa name in DNS response"); | |
1644 return; | |
1645 | |
1646 short_response: | |
1647 | |
1648 err = "short DNS response"; | |
1649 | |
1650 invalid: | |
1651 | |
1652 /* unlock addr mutex */ | |
1653 | |
1654 ngx_log_error(r->log_level, r->log, 0, err); | |
1655 | |
1656 return; | |
1657 | |
1658 failed: | |
1659 | |
1660 /* unlock addr mutex */ | |
1661 | |
1662 return; | |
1663 } | |
1664 | |
1665 | |
1666 static ngx_resolver_node_t * | |
1667 ngx_resolver_lookup_name(ngx_resolver_t *r, ngx_str_t *name, uint32_t hash) | |
1668 { | |
1669 ngx_int_t rc; | |
1670 ngx_rbtree_node_t *node, *sentinel; | |
1671 ngx_resolver_node_t *rn; | |
1672 | |
1673 node = r->name_rbtree.root; | |
1674 sentinel = r->name_rbtree.sentinel; | |
1675 | |
1676 while (node != sentinel) { | |
1677 | |
1678 if (hash < node->key) { | |
1679 node = node->left; | |
1680 continue; | |
1681 } | |
1682 | |
1683 if (hash > node->key) { | |
1684 node = node->right; | |
1685 continue; | |
1686 } | |
1687 | |
1688 /* hash == node->key */ | |
1689 | |
1690 do { | |
1691 rn = (ngx_resolver_node_t *) node; | |
1692 | |
3143
ab6258e18099
fix resolver cache rbtree comparison
Igor Sysoev <igor@sysoev.ru>
parents:
3139
diff
changeset
|
1693 rc = ngx_memn2cmp(name->data, rn->name, name->len, rn->nlen); |
1649 | 1694 |
1695 if (rc == 0) { | |
1696 return rn; | |
1697 } | |
1698 | |
1699 node = (rc < 0) ? node->left : node->right; | |
1700 | |
1701 } while (node != sentinel && hash == node->key); | |
1702 | |
1703 break; | |
1704 } | |
1705 | |
1706 /* not found */ | |
1707 | |
1708 return NULL; | |
1709 } | |
1710 | |
1711 | |
1712 static ngx_resolver_node_t * | |
1713 ngx_resolver_lookup_addr(ngx_resolver_t *r, in_addr_t addr) | |
1714 { | |
1715 ngx_rbtree_node_t *node, *sentinel; | |
1716 | |
1717 node = r->addr_rbtree.root; | |
1718 sentinel = r->addr_rbtree.sentinel; | |
1719 | |
1720 while (node != sentinel) { | |
1721 | |
1722 if (addr < node->key) { | |
1723 node = node->left; | |
1724 continue; | |
1725 } | |
1726 | |
1727 if (addr > node->key) { | |
1728 node = node->right; | |
1729 continue; | |
1730 } | |
1731 | |
1732 /* addr == node->key */ | |
1733 | |
1734 return (ngx_resolver_node_t *) node; | |
1735 } | |
1736 | |
1737 /* not found */ | |
1738 | |
1739 return NULL; | |
1740 } | |
1741 | |
1742 | |
1743 static void | |
1744 ngx_resolver_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
1745 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) | |
1746 { | |
1747 ngx_rbtree_node_t **p; | |
1748 ngx_resolver_node_t *rn, *rn_temp; | |
1749 | |
1750 for ( ;; ) { | |
1751 | |
1752 if (node->key < temp->key) { | |
1753 | |
1754 p = &temp->left; | |
1755 | |
1756 } else if (node->key > temp->key) { | |
1757 | |
1758 p = &temp->right; | |
1759 | |
1760 } else { /* node->key == temp->key */ | |
1761 | |
1762 rn = (ngx_resolver_node_t *) node; | |
1763 rn_temp = (ngx_resolver_node_t *) temp; | |
1764 | |
3143
ab6258e18099
fix resolver cache rbtree comparison
Igor Sysoev <igor@sysoev.ru>
parents:
3139
diff
changeset
|
1765 p = (ngx_memn2cmp(rn->name, rn_temp->name, rn->nlen, rn_temp->nlen) |
ab6258e18099
fix resolver cache rbtree comparison
Igor Sysoev <igor@sysoev.ru>
parents:
3139
diff
changeset
|
1766 < 0) ? &temp->left : &temp->right; |
1649 | 1767 } |
1768 | |
1769 if (*p == sentinel) { | |
1770 break; | |
1771 } | |
1772 | |
1773 temp = *p; | |
1774 } | |
1775 | |
1776 *p = node; | |
1777 node->parent = temp; | |
1778 node->left = sentinel; | |
1779 node->right = sentinel; | |
1780 ngx_rbt_red(node); | |
1781 } | |
1782 | |
1783 | |
1784 static ngx_int_t | |
1785 ngx_resolver_create_name_query(ngx_resolver_node_t *rn, ngx_resolver_ctx_t *ctx) | |
1786 { | |
1787 u_char *p, *s; | |
3306
61bdaac6c668
fix resolving an empty name (".")
Igor Sysoev <igor@sysoev.ru>
parents:
3299
diff
changeset
|
1788 size_t len, nlen; |
1649 | 1789 ngx_uint_t ident; |
1790 ngx_resolver_qs_t *qs; | |
1791 ngx_resolver_query_t *query; | |
1792 | |
3306
61bdaac6c668
fix resolving an empty name (".")
Igor Sysoev <igor@sysoev.ru>
parents:
3299
diff
changeset
|
1793 nlen = ctx->name.len ? (1 + ctx->name.len + 1) : 1; |
61bdaac6c668
fix resolving an empty name (".")
Igor Sysoev <igor@sysoev.ru>
parents:
3299
diff
changeset
|
1794 |
61bdaac6c668
fix resolving an empty name (".")
Igor Sysoev <igor@sysoev.ru>
parents:
3299
diff
changeset
|
1795 len = sizeof(ngx_resolver_query_t) + nlen + sizeof(ngx_resolver_qs_t); |
1649 | 1796 |
3307
34e99a97fbd6
use ngx_resolver_alloc() instead of ngx_resolver_calloc()
Igor Sysoev <igor@sysoev.ru>
parents:
3306
diff
changeset
|
1797 p = ngx_resolver_alloc(ctx->resolver, len); |
1649 | 1798 if (p == NULL) { |
1799 return NGX_ERROR; | |
1800 } | |
1801 | |
1802 rn->qlen = (u_short) len; | |
1803 rn->query = p; | |
1804 | |
1805 query = (ngx_resolver_query_t *) p; | |
1806 | |
1807 ident = ngx_random(); | |
1808 | |
1809 ngx_log_debug2(NGX_LOG_DEBUG_CORE, ctx->resolver->log, 0, | |
1810 "resolve: \"%V\" %i", &ctx->name, ident & 0xffff); | |
1811 | |
1812 query->ident_hi = (u_char) ((ident >> 8) & 0xff); | |
1813 query->ident_lo = (u_char) (ident & 0xff); | |
1814 | |
1815 /* recursion query */ | |
1816 query->flags_hi = 1; query->flags_lo = 0; | |
1817 | |
1818 /* one question */ | |
1819 query->nqs_hi = 0; query->nqs_lo = 1; | |
1820 query->nan_hi = 0; query->nan_lo = 0; | |
1821 query->nns_hi = 0; query->nns_lo = 0; | |
1822 query->nar_hi = 0; query->nar_lo = 0; | |
1823 | |
3306
61bdaac6c668
fix resolving an empty name (".")
Igor Sysoev <igor@sysoev.ru>
parents:
3299
diff
changeset
|
1824 p += sizeof(ngx_resolver_query_t) + nlen; |
1649 | 1825 |
1826 qs = (ngx_resolver_qs_t *) p; | |
1827 | |
1828 /* query type */ | |
1829 qs->type_hi = 0; qs->type_lo = (u_char) ctx->type; | |
1830 | |
1831 /* IP query class */ | |
1832 qs->class_hi = 0; qs->class_lo = 1; | |
1833 | |
1834 /* convert "www.example.com" to "\3www\7example\3com\0" */ | |
1835 | |
1836 len = 0; | |
1837 p--; | |
1838 *p-- = '\0'; | |
1839 | |
1840 for (s = ctx->name.data + ctx->name.len - 1; s >= ctx->name.data; s--) { | |
1841 if (*s != '.') { | |
1842 *p = *s; | |
1843 len++; | |
1844 | |
1845 } else { | |
1961
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
1846 if (len == 0) { |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
1847 return NGX_DECLINED; |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
1848 } |
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
1849 |
1649 | 1850 *p = (u_char) len; |
1851 len = 0; | |
1852 } | |
1853 | |
1854 p--; | |
1855 } | |
1856 | |
1857 *p = (u_char) len; | |
1858 | |
1859 return NGX_OK; | |
1860 } | |
1861 | |
1862 | |
1863 /* AF_INET only */ | |
1864 | |
1865 static ngx_int_t | |
1866 ngx_resolver_create_addr_query(ngx_resolver_node_t *rn, ngx_resolver_ctx_t *ctx) | |
1867 { | |
1868 u_char *p, *d; | |
1869 size_t len; | |
1870 ngx_int_t n; | |
1871 ngx_uint_t ident; | |
1872 ngx_resolver_query_t *query; | |
1873 | |
1874 len = sizeof(ngx_resolver_query_t) | |
1875 + sizeof(".255.255.255.255.in-addr.arpa.") - 1 | |
1876 + sizeof(ngx_resolver_qs_t); | |
1877 | |
3307
34e99a97fbd6
use ngx_resolver_alloc() instead of ngx_resolver_calloc()
Igor Sysoev <igor@sysoev.ru>
parents:
3306
diff
changeset
|
1878 p = ngx_resolver_alloc(ctx->resolver, len); |
1649 | 1879 if (p == NULL) { |
1880 return NGX_ERROR; | |
1881 } | |
1882 | |
1883 rn->query = p; | |
1884 query = (ngx_resolver_query_t *) p; | |
1885 | |
1886 ident = ngx_random(); | |
1887 | |
1888 query->ident_hi = (u_char) ((ident >> 8) & 0xff); | |
1889 query->ident_lo = (u_char) (ident & 0xff); | |
1890 | |
1891 /* recursion query */ | |
1892 query->flags_hi = 1; query->flags_lo = 0; | |
1893 | |
1894 /* one question */ | |
1895 query->nqs_hi = 0; query->nqs_lo = 1; | |
1896 query->nan_hi = 0; query->nan_lo = 0; | |
1897 query->nns_hi = 0; query->nns_lo = 0; | |
1898 query->nar_hi = 0; query->nar_lo = 0; | |
1899 | |
1900 p += sizeof(ngx_resolver_query_t); | |
1901 | |
3642 | 1902 for (n = 0; n < 32; n += 8) { |
1649 | 1903 d = ngx_sprintf(&p[1], "%ud", (ctx->addr >> n) & 0xff); |
1904 *p = (u_char) (d - &p[1]); | |
1905 p = d; | |
1906 } | |
1907 | |
1908 /* query type "PTR", IP query class */ | |
1909 ngx_memcpy(p, "\7in-addr\4arpa\0\0\14\0\1", 18); | |
1910 | |
1911 rn->qlen = (u_short) | |
1912 (p + sizeof("\7in-addr\4arpa") + sizeof(ngx_resolver_qs_t) | |
1913 - rn->query); | |
1914 | |
1915 return NGX_OK; | |
1916 } | |
1917 | |
1918 | |
1919 static ngx_int_t | |
1920 ngx_resolver_copy(ngx_resolver_t *r, ngx_str_t *name, u_char *buf, u_char *src, | |
1921 u_char *last) | |
1922 { | |
1923 char *err; | |
1924 u_char *p, *dst; | |
1925 ssize_t len; | |
1926 ngx_uint_t i, n; | |
1927 | |
1928 p = src; | |
1929 len = -1; | |
1930 | |
1931 /* | |
1932 * compression pointers allow to create endless loop, so we set limit; | |
1933 * 128 pointers should be enough to store 255-byte name | |
1934 */ | |
1935 | |
1936 for (i = 0; i < 128; i++) { | |
1937 n = *p++; | |
1938 | |
1939 if (n == 0) { | |
1940 goto done; | |
1941 } | |
1942 | |
1943 if (n & 0xc0) { | |
2314
52987a023486
fix compression pointer for big (>255) DNS responses
Igor Sysoev <igor@sysoev.ru>
parents:
2282
diff
changeset
|
1944 n = ((n & 0x3f) << 8) + *p; |
1649 | 1945 p = &buf[n]; |
1946 | |
1947 } else { | |
1948 len += 1 + n; | |
1949 p = &p[n]; | |
1950 } | |
1951 | |
1952 if (p >= last) { | |
1953 err = "name is out of response"; | |
1954 goto invalid; | |
1955 } | |
1956 } | |
1957 | |
1958 err = "compression pointers loop"; | |
1959 | |
1960 invalid: | |
1961 | |
1962 ngx_log_error(r->log_level, r->log, 0, err); | |
1963 | |
1964 return NGX_ERROR; | |
1965 | |
1966 done: | |
1967 | |
1968 if (name == NULL) { | |
583 | 1969 return NGX_OK; |
1970 } | |
1971 | |
3298
847ab5a32307
fix "PTR ." case in address resolver
Igor Sysoev <igor@sysoev.ru>
parents:
3297
diff
changeset
|
1972 if (len == -1) { |
847ab5a32307
fix "PTR ." case in address resolver
Igor Sysoev <igor@sysoev.ru>
parents:
3297
diff
changeset
|
1973 name->len = 0; |
847ab5a32307
fix "PTR ." case in address resolver
Igor Sysoev <igor@sysoev.ru>
parents:
3297
diff
changeset
|
1974 name->data = NULL; |
847ab5a32307
fix "PTR ." case in address resolver
Igor Sysoev <igor@sysoev.ru>
parents:
3297
diff
changeset
|
1975 return NGX_OK; |
847ab5a32307
fix "PTR ." case in address resolver
Igor Sysoev <igor@sysoev.ru>
parents:
3297
diff
changeset
|
1976 } |
847ab5a32307
fix "PTR ." case in address resolver
Igor Sysoev <igor@sysoev.ru>
parents:
3297
diff
changeset
|
1977 |
1649 | 1978 dst = ngx_resolver_alloc(r, len); |
1979 if (dst == NULL) { | |
1980 return NGX_ERROR; | |
1981 } | |
1982 | |
1983 name->data = dst; | |
1984 | |
1985 n = *src++; | |
1986 | |
1987 for ( ;; ) { | |
4267
768212ca0745
Fixed compression pointer processing in DNS response greater than 255 bytes.
Igor Sysoev <igor@sysoev.ru>
parents:
4225
diff
changeset
|
1988 if (n & 0xc0) { |
768212ca0745
Fixed compression pointer processing in DNS response greater than 255 bytes.
Igor Sysoev <igor@sysoev.ru>
parents:
4225
diff
changeset
|
1989 n = ((n & 0x3f) << 8) + *src; |
768212ca0745
Fixed compression pointer processing in DNS response greater than 255 bytes.
Igor Sysoev <igor@sysoev.ru>
parents:
4225
diff
changeset
|
1990 src = &buf[n]; |
768212ca0745
Fixed compression pointer processing in DNS response greater than 255 bytes.
Igor Sysoev <igor@sysoev.ru>
parents:
4225
diff
changeset
|
1991 |
768212ca0745
Fixed compression pointer processing in DNS response greater than 255 bytes.
Igor Sysoev <igor@sysoev.ru>
parents:
4225
diff
changeset
|
1992 n = *src++; |
768212ca0745
Fixed compression pointer processing in DNS response greater than 255 bytes.
Igor Sysoev <igor@sysoev.ru>
parents:
4225
diff
changeset
|
1993 |
768212ca0745
Fixed compression pointer processing in DNS response greater than 255 bytes.
Igor Sysoev <igor@sysoev.ru>
parents:
4225
diff
changeset
|
1994 } else { |
1649 | 1995 ngx_memcpy(dst, src, n); |
1996 dst += n; | |
1997 src += n; | |
1998 | |
1999 n = *src++; | |
2000 | |
2001 if (n != 0) { | |
2002 *dst++ = '.'; | |
2003 } | |
2004 } | |
2005 | |
2006 if (n == 0) { | |
2007 name->len = dst - name->data; | |
2008 return NGX_OK; | |
2009 } | |
2010 } | |
2011 } | |
2012 | |
2013 | |
2014 static void | |
2015 ngx_resolver_timeout_handler(ngx_event_t *ev) | |
2016 { | |
2017 ngx_resolver_ctx_t *ctx; | |
2018 | |
2019 ctx = ev->data; | |
2020 | |
2021 ctx->state = NGX_RESOLVE_TIMEDOUT; | |
2022 | |
2023 ctx->handler(ctx); | |
2024 } | |
2025 | |
2026 | |
2027 static void | |
2028 ngx_resolver_free_node(ngx_resolver_t *r, ngx_resolver_node_t *rn) | |
2029 { | |
2030 /* lock alloc mutex */ | |
2031 | |
2032 if (rn->query) { | |
2033 ngx_resolver_free_locked(r, rn->query); | |
2034 } | |
2035 | |
2036 if (rn->name) { | |
2037 ngx_resolver_free_locked(r, rn->name); | |
2038 } | |
2039 | |
2040 if (rn->cnlen) { | |
2041 ngx_resolver_free_locked(r, rn->u.cname); | |
2042 } | |
2043 | |
2044 if (rn->naddrs > 1) { | |
2045 ngx_resolver_free_locked(r, rn->u.addrs); | |
2046 } | |
2047 | |
2048 ngx_resolver_free_locked(r, rn); | |
2049 | |
2050 /* unlock alloc mutex */ | |
2051 } | |
2052 | |
2053 | |
2054 static void * | |
2055 ngx_resolver_alloc(ngx_resolver_t *r, size_t size) | |
2056 { | |
2057 u_char *p; | |
2058 | |
2059 /* lock alloc mutex */ | |
2060 | |
2061 p = ngx_alloc(size, r->log); | |
2062 | |
2063 /* unlock alloc mutex */ | |
2064 | |
2065 return p; | |
2066 } | |
2067 | |
2068 | |
1903 | 2069 static void * |
1649 | 2070 ngx_resolver_calloc(ngx_resolver_t *r, size_t size) |
2071 { | |
2072 u_char *p; | |
2073 | |
2074 p = ngx_resolver_alloc(r, size); | |
2075 | |
2076 if (p) { | |
2077 ngx_memzero(p, size); | |
2078 } | |
2079 | |
2080 return p; | |
2081 } | |
2082 | |
2083 | |
2084 static void | |
2085 ngx_resolver_free(ngx_resolver_t *r, void *p) | |
2086 { | |
2087 /* lock alloc mutex */ | |
2088 | |
2089 ngx_free(p); | |
2090 | |
2091 /* unlock alloc mutex */ | |
2092 } | |
2093 | |
2094 | |
2095 static void | |
2096 ngx_resolver_free_locked(ngx_resolver_t *r, void *p) | |
2097 { | |
2098 ngx_free(p); | |
2099 } | |
2100 | |
2101 | |
2102 static void * | |
2103 ngx_resolver_dup(ngx_resolver_t *r, void *src, size_t size) | |
2104 { | |
2105 void *dst; | |
2106 | |
2107 dst = ngx_resolver_alloc(r, size); | |
2108 | |
2109 if (dst == NULL) { | |
2110 return dst; | |
2111 } | |
2112 | |
2113 ngx_memcpy(dst, src, size); | |
2114 | |
2115 return dst; | |
2116 } | |
2117 | |
2118 | |
2119 char * | |
2120 ngx_resolver_strerror(ngx_int_t err) | |
2121 { | |
2122 static char *errors[] = { | |
2123 "Format error", /* FORMERR */ | |
2124 "Server failure", /* SERVFAIL */ | |
2125 "Host not found", /* NXDOMAIN */ | |
2126 "Unimplemented", /* NOTIMP */ | |
2127 "Operation refused" /* REFUSED */ | |
2128 }; | |
2129 | |
2130 if (err > 0 && err < 6) { | |
2131 return errors[err - 1]; | |
2132 } | |
2133 | |
2134 if (err == NGX_RESOLVE_TIMEDOUT) { | |
2135 return "Operation timed out"; | |
2136 } | |
2137 | |
2138 return "Unknown error"; | |
2139 } | |
2140 | |
2141 | |
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2142 static u_char * |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2143 ngx_resolver_log_error(ngx_log_t *log, u_char *buf, size_t len) |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2144 { |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2145 u_char *p; |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2146 ngx_udp_connection_t *uc; |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2147 |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2148 p = buf; |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2149 |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2150 if (log->action) { |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2151 p = ngx_snprintf(buf, len, " while %s", log->action); |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2152 len -= p - buf; |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2153 } |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2154 |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2155 uc = log->data; |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2156 |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2157 if (uc) { |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2158 p = ngx_snprintf(p, len, ", resolver: %V", &uc->server); |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2159 } |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2160 |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2161 return p; |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2162 } |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2163 |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2164 |
1649 | 2165 ngx_int_t |
2166 ngx_udp_connect(ngx_udp_connection_t *uc) | |
2167 { | |
2168 int rc; | |
2169 ngx_int_t event; | |
2170 ngx_event_t *rev, *wev; | |
2171 ngx_socket_t s; | |
2172 ngx_connection_t *c; | |
2173 | |
583 | 2174 s = ngx_socket(AF_INET, SOCK_DGRAM, 0); |
2175 | |
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2176 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, &uc->log, 0, "UDP socket %d", s); |
583 | 2177 |
2178 if (s == -1) { | |
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2179 ngx_log_error(NGX_LOG_ALERT, &uc->log, ngx_socket_errno, |
583 | 2180 ngx_socket_n " failed"); |
2181 return NGX_ERROR; | |
2182 } | |
2183 | |
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2184 c = ngx_get_connection(s, &uc->log); |
583 | 2185 |
2186 if (c == NULL) { | |
2187 if (ngx_close_socket(s) == -1) { | |
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2188 ngx_log_error(NGX_LOG_ALERT, &uc->log, ngx_socket_errno, |
583 | 2189 ngx_close_socket_n "failed"); |
2190 } | |
2191 | |
2192 return NGX_ERROR; | |
2193 } | |
2194 | |
1649 | 2195 if (ngx_nonblocking(s) == -1) { |
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2196 ngx_log_error(NGX_LOG_ALERT, &uc->log, ngx_socket_errno, |
1649 | 2197 ngx_nonblocking_n " failed"); |
2198 | |
2199 ngx_free_connection(c); | |
2200 | |
2201 if (ngx_close_socket(s) == -1) { | |
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2202 ngx_log_error(NGX_LOG_ALERT, &uc->log, ngx_socket_errno, |
1649 | 2203 ngx_close_socket_n " failed"); |
2204 } | |
2205 | |
2206 return NGX_ERROR; | |
2207 } | |
2208 | |
583 | 2209 rev = c->read; |
2210 wev = c->write; | |
2211 | |
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2212 rev->log = &uc->log; |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2213 wev->log = &uc->log; |
1649 | 2214 |
2215 uc->connection = c; | |
583 | 2216 |
2217 c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1); | |
2218 | |
2219 #if (NGX_THREADS) | |
1649 | 2220 |
2221 /* TODO: lock event when call completion handler */ | |
2222 | |
2223 rev->lock = &c->lock; | |
2224 wev->lock = &c->lock; | |
583 | 2225 rev->own_lock = &c->lock; |
2226 wev->own_lock = &c->lock; | |
1649 | 2227 |
583 | 2228 #endif |
2229 | |
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2230 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, &uc->log, 0, |
1649 | 2231 "connect to %V, fd:%d #%d", &uc->server, s, c->number); |
2232 | |
2233 rc = connect(s, uc->sockaddr, uc->socklen); | |
2234 | |
2235 /* TODO: aio, iocp */ | |
583 | 2236 |
2237 if (rc == -1) { | |
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2238 ngx_log_error(NGX_LOG_CRIT, &uc->log, ngx_socket_errno, |
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
2239 "connect() failed"); |
583 | 2240 |
2241 return NGX_ERROR; | |
2242 } | |
2243 | |
1649 | 2244 /* UDP sockets are always ready to write */ |
2245 wev->ready = 1; | |
2246 | |
2247 if (ngx_add_event) { | |
2248 | |
2249 event = (ngx_event_flags & NGX_USE_CLEAR_EVENT) ? | |
2250 /* kqueue, epoll */ NGX_CLEAR_EVENT: | |
2251 /* select, poll, /dev/poll */ NGX_LEVEL_EVENT; | |
2252 /* eventport event type has no meaning: oneshot only */ | |
2253 | |
2254 if (ngx_add_event(rev, NGX_READ_EVENT, event) != NGX_OK) { | |
2255 return NGX_ERROR; | |
2256 } | |
2257 | |
2258 } else { | |
2259 /* rtsig */ | |
2260 | |
583 | 2261 if (ngx_add_conn(c) == NGX_ERROR) { |
2262 return NGX_ERROR; | |
2263 } | |
2264 } | |
2265 | |
2266 return NGX_OK; | |
2267 } |