Mercurial > hg > nginx
annotate src/core/ngx_resolver.c @ 6360:93d70d87914c stable-1.8
Resolver: limited CNAME recursion.
Previously, the recursion was only limited for cached responses.
| author | Ruslan Ermilov <ru@nginx.com> |
|---|---|
| date | Tue, 26 Jan 2016 16:47:14 +0300 |
| parents | dac6eda40475 |
| children |
| rev | line source |
|---|---|
| 583 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4412 | 4 * Copyright (C) Nginx, Inc. |
| 583 | 5 */ |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_event.h> | |
| 11 | |
| 12 | |
| 1649 | 13 #define NGX_RESOLVER_UDP_SIZE 4096 |
| 14 | |
| 15 | |
| 583 | 16 typedef struct { |
| 1649 | 17 u_char ident_hi; |
| 18 u_char ident_lo; | |
| 19 u_char flags_hi; | |
| 20 u_char flags_lo; | |
| 21 u_char nqs_hi; | |
| 22 u_char nqs_lo; | |
| 23 u_char nan_hi; | |
| 24 u_char nan_lo; | |
| 25 u_char nns_hi; | |
| 26 u_char nns_lo; | |
| 27 u_char nar_hi; | |
| 28 u_char nar_lo; | |
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Resolver: improved code readability.
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29 } ngx_resolver_hdr_t; |
| 1649 | 30 |
| 31 | |
| 32 typedef struct { | |
| 33 u_char type_hi; | |
| 34 u_char type_lo; | |
| 35 u_char class_hi; | |
| 36 u_char class_lo; | |
| 37 } ngx_resolver_qs_t; | |
| 38 | |
| 39 | |
| 40 typedef struct { | |
| 41 u_char type_hi; | |
| 42 u_char type_lo; | |
| 43 u_char class_hi; | |
| 44 u_char class_lo; | |
| 45 u_char ttl[4]; | |
| 46 u_char len_hi; | |
| 47 u_char len_lo; | |
| 48 } ngx_resolver_an_t; | |
| 49 | |
| 50 | |
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51 #define ngx_resolver_node(n) \ |
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52 (ngx_resolver_node_t *) \ |
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53 ((u_char *) (n) - offsetof(ngx_resolver_node_t, node)) |
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54 |
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55 |
| 1649 | 56 ngx_int_t ngx_udp_connect(ngx_udp_connection_t *uc); |
| 57 | |
| 58 | |
| 1906 | 59 static void ngx_resolver_cleanup(void *data); |
| 60 static void ngx_resolver_cleanup_tree(ngx_resolver_t *r, ngx_rbtree_t *tree); | |
| 1649 | 61 static ngx_int_t ngx_resolve_name_locked(ngx_resolver_t *r, |
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Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
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62 ngx_resolver_ctx_t *ctx, ngx_str_t *name); |
| 1649 | 63 static void ngx_resolver_expire(ngx_resolver_t *r, ngx_rbtree_t *tree, |
| 64 ngx_queue_t *queue); | |
| 65 static ngx_int_t ngx_resolver_send_query(ngx_resolver_t *r, | |
| 66 ngx_resolver_node_t *rn); | |
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67 static ngx_int_t ngx_resolver_create_name_query(ngx_resolver_t *r, |
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68 ngx_resolver_node_t *rn, ngx_str_t *name); |
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69 static ngx_int_t ngx_resolver_create_addr_query(ngx_resolver_t *r, |
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70 ngx_resolver_node_t *rn, ngx_addr_t *addr); |
| 1649 | 71 static void ngx_resolver_resend_handler(ngx_event_t *ev); |
| 72 static time_t ngx_resolver_resend(ngx_resolver_t *r, ngx_rbtree_t *tree, | |
| 73 ngx_queue_t *queue); | |
| 74 static void ngx_resolver_read_response(ngx_event_t *rev); | |
| 75 static void ngx_resolver_process_response(ngx_resolver_t *r, u_char *buf, | |
| 76 size_t n); | |
| 77 static void ngx_resolver_process_a(ngx_resolver_t *r, u_char *buf, size_t n, | |
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Resolver: implemented IPv6 name to address resolving.
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78 ngx_uint_t ident, ngx_uint_t code, ngx_uint_t qtype, |
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79 ngx_uint_t nan, ngx_uint_t ans); |
| 1649 | 80 static void ngx_resolver_process_ptr(ngx_resolver_t *r, u_char *buf, size_t n, |
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no answers in DNS response should be NXDOMAIN
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81 ngx_uint_t ident, ngx_uint_t code, ngx_uint_t nan); |
| 1649 | 82 static ngx_resolver_node_t *ngx_resolver_lookup_name(ngx_resolver_t *r, |
| 83 ngx_str_t *name, uint32_t hash); | |
| 84 static ngx_resolver_node_t *ngx_resolver_lookup_addr(ngx_resolver_t *r, | |
| 85 in_addr_t addr); | |
| 86 static void ngx_resolver_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
| 87 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel); | |
| 88 static ngx_int_t ngx_resolver_copy(ngx_resolver_t *r, ngx_str_t *name, | |
| 89 u_char *buf, u_char *src, u_char *last); | |
| 90 static void ngx_resolver_timeout_handler(ngx_event_t *ev); | |
| 91 static void ngx_resolver_free_node(ngx_resolver_t *r, ngx_resolver_node_t *rn); | |
| 92 static void *ngx_resolver_alloc(ngx_resolver_t *r, size_t size); | |
| 1903 | 93 static void *ngx_resolver_calloc(ngx_resolver_t *r, size_t size); |
| 1649 | 94 static void ngx_resolver_free(ngx_resolver_t *r, void *p); |
| 95 static void ngx_resolver_free_locked(ngx_resolver_t *r, void *p); | |
| 96 static void *ngx_resolver_dup(ngx_resolver_t *r, void *src, size_t size); | |
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Resolver: implemented IPv6 name to address resolving.
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97 static ngx_addr_t *ngx_resolver_export(ngx_resolver_t *r, |
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98 ngx_resolver_node_t *rn, ngx_uint_t rotate); |
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add context to a resolver log
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99 static u_char *ngx_resolver_log_error(ngx_log_t *log, u_char *buf, size_t len); |
| 1649 | 100 |
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101 #if (NGX_HAVE_INET6) |
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102 static void ngx_resolver_rbtree_insert_addr6_value(ngx_rbtree_node_t *temp, |
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103 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel); |
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104 static ngx_resolver_node_t *ngx_resolver_lookup_addr6(ngx_resolver_t *r, |
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105 struct in6_addr *addr, uint32_t hash); |
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106 #endif |
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107 |
| 1649 | 108 |
| 109 ngx_resolver_t * | |
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110 ngx_resolver_create(ngx_conf_t *cf, ngx_str_t *names, ngx_uint_t n) |
| 1649 | 111 { |
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112 ngx_str_t s; |
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113 ngx_url_t u; |
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114 ngx_uint_t i, j; |
| 1649 | 115 ngx_resolver_t *r; |
| 1906 | 116 ngx_pool_cleanup_t *cln; |
| 1649 | 117 ngx_udp_connection_t *uc; |
| 118 | |
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119 cln = ngx_pool_cleanup_add(cf->pool, 0); |
| 1906 | 120 if (cln == NULL) { |
| 121 return NULL; | |
| 122 } | |
| 123 | |
| 124 cln->handler = ngx_resolver_cleanup; | |
| 125 | |
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126 r = ngx_calloc(sizeof(ngx_resolver_t), cf->log); |
| 1649 | 127 if (r == NULL) { |
| 128 return NULL; | |
| 129 } | |
| 130 | |
| 1906 | 131 cln->data = r; |
| 132 | |
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133 r->event = ngx_calloc(sizeof(ngx_event_t), cf->log); |
| 1649 | 134 if (r->event == NULL) { |
| 135 return NULL; | |
| 136 } | |
| 137 | |
| 1687 | 138 ngx_rbtree_init(&r->name_rbtree, &r->name_sentinel, |
| 139 ngx_resolver_rbtree_insert_value); | |
| 140 | |
| 141 ngx_rbtree_init(&r->addr_rbtree, &r->addr_sentinel, | |
| 142 ngx_rbtree_insert_value); | |
| 1649 | 143 |
| 1685 | 144 ngx_queue_init(&r->name_resend_queue); |
| 145 ngx_queue_init(&r->addr_resend_queue); | |
| 146 | |
| 147 ngx_queue_init(&r->name_expire_queue); | |
| 148 ngx_queue_init(&r->addr_expire_queue); | |
| 1649 | 149 |
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150 #if (NGX_HAVE_INET6) |
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151 r->ipv6 = 1; |
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152 |
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153 ngx_rbtree_init(&r->addr6_rbtree, &r->addr6_sentinel, |
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154 ngx_resolver_rbtree_insert_addr6_value); |
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155 |
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156 ngx_queue_init(&r->addr6_resend_queue); |
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157 |
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158 ngx_queue_init(&r->addr6_expire_queue); |
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159 #endif |
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160 |
| 1649 | 161 r->event->handler = ngx_resolver_resend_handler; |
| 162 r->event->data = r; | |
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163 r->event->log = &cf->cycle->new_log; |
| 1649 | 164 r->ident = -1; |
| 165 | |
| 166 r->resend_timeout = 5; | |
| 167 r->expire = 30; | |
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168 r->valid = 0; |
| 1649 | 169 |
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170 r->log = &cf->cycle->new_log; |
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171 r->log_level = NGX_LOG_ERR; |
| 1649 | 172 |
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173 if (n) { |
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174 if (ngx_array_init(&r->udp_connections, cf->pool, n, |
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175 sizeof(ngx_udp_connection_t)) |
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176 != NGX_OK) |
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177 { |
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178 return NULL; |
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179 } |
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180 } |
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181 |
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182 for (i = 0; i < n; i++) { |
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183 if (ngx_strncmp(names[i].data, "valid=", 6) == 0) { |
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184 s.len = names[i].len - 6; |
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185 s.data = names[i].data + 6; |
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186 |
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187 r->valid = ngx_parse_time(&s, 1); |
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188 |
| 4474 | 189 if (r->valid == (time_t) NGX_ERROR) { |
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190 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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191 "invalid parameter: %V", &names[i]); |
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192 return NULL; |
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193 } |
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194 |
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195 continue; |
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196 } |
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197 |
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198 #if (NGX_HAVE_INET6) |
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199 if (ngx_strncmp(names[i].data, "ipv6=", 5) == 0) { |
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200 |
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201 if (ngx_strcmp(&names[i].data[5], "on") == 0) { |
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202 r->ipv6 = 1; |
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203 |
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204 } else if (ngx_strcmp(&names[i].data[5], "off") == 0) { |
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205 r->ipv6 = 0; |
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206 |
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207 } else { |
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208 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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209 "invalid parameter: %V", &names[i]); |
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210 return NULL; |
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211 } |
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212 |
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213 continue; |
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214 } |
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215 #endif |
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216 |
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217 ngx_memzero(&u, sizeof(ngx_url_t)); |
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218 |
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219 u.url = names[i]; |
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220 u.default_port = 53; |
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221 |
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222 if (ngx_parse_url(cf->pool, &u) != NGX_OK) { |
|
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223 if (u.err) { |
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224 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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225 "%s in resolver \"%V\"", |
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226 u.err, &u.url); |
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227 } |
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228 |
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229 return NULL; |
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230 } |
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231 |
|
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232 uc = ngx_array_push_n(&r->udp_connections, u.naddrs); |
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233 if (uc == NULL) { |
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234 return NULL; |
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235 } |
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236 |
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237 ngx_memzero(uc, u.naddrs * sizeof(ngx_udp_connection_t)); |
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238 |
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239 for (j = 0; j < u.naddrs; j++) { |
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240 uc[j].sockaddr = u.addrs[j].sockaddr; |
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241 uc[j].socklen = u.addrs[j].socklen; |
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242 uc[j].server = u.addrs[j].name; |
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243 } |
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244 } |
| 1649 | 245 |
| 246 return r; | |
| 247 } | |
| 248 | |
| 249 | |
| 1906 | 250 static void |
| 251 ngx_resolver_cleanup(void *data) | |
| 252 { | |
| 253 ngx_resolver_t *r = data; | |
| 254 | |
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255 ngx_uint_t i; |
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256 ngx_udp_connection_t *uc; |
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257 |
| 1906 | 258 if (r) { |
| 259 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, | |
| 260 "cleanup resolver"); | |
| 261 | |
| 262 ngx_resolver_cleanup_tree(r, &r->name_rbtree); | |
| 263 | |
| 264 ngx_resolver_cleanup_tree(r, &r->addr_rbtree); | |
| 265 | |
|
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266 #if (NGX_HAVE_INET6) |
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267 ngx_resolver_cleanup_tree(r, &r->addr6_rbtree); |
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268 #endif |
|
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269 |
| 1906 | 270 if (r->event) { |
| 271 ngx_free(r->event); | |
| 272 } | |
| 273 | |
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274 |
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275 uc = r->udp_connections.elts; |
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276 |
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277 for (i = 0; i < r->udp_connections.nelts; i++) { |
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|
278 if (uc[i].connection) { |
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|
279 ngx_close_connection(uc[i].connection); |
| 1906 | 280 } |
| 281 } | |
| 282 | |
| 283 ngx_free(r); | |
| 284 } | |
| 285 } | |
| 286 | |
| 287 | |
| 288 static void | |
| 289 ngx_resolver_cleanup_tree(ngx_resolver_t *r, ngx_rbtree_t *tree) | |
| 290 { | |
| 291 ngx_resolver_ctx_t *ctx, *next; | |
| 292 ngx_resolver_node_t *rn; | |
| 293 | |
| 294 while (tree->root != tree->sentinel) { | |
| 295 | |
|
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diff
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296 rn = ngx_resolver_node(ngx_rbtree_min(tree->root, tree->sentinel)); |
| 1906 | 297 |
| 298 ngx_queue_remove(&rn->queue); | |
| 299 | |
| 300 for (ctx = rn->waiting; ctx; ctx = next) { | |
|
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style fix: remove tabs and trailing spaces
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diff
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|
301 next = ctx->next; |
| 1906 | 302 |
| 303 if (ctx->event) { | |
| 304 ngx_resolver_free(r, ctx->event); | |
| 305 } | |
| 306 | |
| 307 ngx_resolver_free(r, ctx); | |
| 308 } | |
| 309 | |
| 310 ngx_rbtree_delete(tree, &rn->node); | |
| 311 | |
| 312 ngx_resolver_free_node(r, rn); | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 | |
| 1649 | 317 ngx_resolver_ctx_t * |
| 318 ngx_resolve_start(ngx_resolver_t *r, ngx_resolver_ctx_t *temp) | |
| 319 { | |
| 320 in_addr_t addr; | |
| 321 ngx_resolver_ctx_t *ctx; | |
| 322 | |
| 323 if (temp) { | |
| 324 addr = ngx_inet_addr(temp->name.data, temp->name.len); | |
| 325 | |
| 326 if (addr != INADDR_NONE) { | |
| 327 temp->resolver = r; | |
| 328 temp->state = NGX_OK; | |
| 329 temp->naddrs = 1; | |
| 330 temp->addrs = &temp->addr; | |
|
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diff
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|
331 temp->addr.sockaddr = (struct sockaddr *) &temp->sin; |
|
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|
332 temp->addr.socklen = sizeof(struct sockaddr_in); |
|
07dd5bd222ac
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diff
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|
333 ngx_memzero(&temp->sin, sizeof(struct sockaddr_in)); |
|
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diff
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|
334 temp->sin.sin_family = AF_INET; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
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diff
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|
335 temp->sin.sin_addr.s_addr = addr; |
| 1649 | 336 temp->quick = 1; |
| 337 | |
| 338 return temp; | |
| 339 } | |
| 340 } | |
| 341 | |
|
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|
342 if (r->udp_connections.nelts == 0) { |
|
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343 return NGX_NO_RESOLVER; |
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344 } |
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|
345 |
| 1649 | 346 ctx = ngx_resolver_calloc(r, sizeof(ngx_resolver_ctx_t)); |
| 347 | |
| 348 if (ctx) { | |
| 349 ctx->resolver = r; | |
| 350 } | |
| 351 | |
| 352 return ctx; | |
| 353 } | |
| 354 | |
| 355 | |
| 356 ngx_int_t | |
| 357 ngx_resolve_name(ngx_resolver_ctx_t *ctx) | |
| 358 { | |
| 359 ngx_int_t rc; | |
| 360 ngx_resolver_t *r; | |
| 361 | |
| 362 r = ctx->resolver; | |
| 363 | |
|
5505
d091d16ed398
Resolver: added support for domain names with a trailing dot.
Yichun Zhang <agentzh@gmail.com>
parents:
5485
diff
changeset
|
364 if (ctx->name.len > 0 && ctx->name.data[ctx->name.len - 1] == '.') { |
|
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parents:
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diff
changeset
|
365 ctx->name.len--; |
|
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|
366 } |
|
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5485
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|
367 |
| 1649 | 368 ngx_log_debug1(NGX_LOG_DEBUG_CORE, r->log, 0, |
| 369 "resolve: \"%V\"", &ctx->name); | |
| 370 | |
| 371 if (ctx->quick) { | |
| 372 ctx->handler(ctx); | |
| 373 return NGX_OK; | |
| 374 } | |
| 375 | |
| 376 /* lock name mutex */ | |
| 377 | |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
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6358
diff
changeset
|
378 rc = ngx_resolve_name_locked(r, ctx, &ctx->name); |
| 1649 | 379 |
| 380 if (rc == NGX_OK) { | |
| 381 return NGX_OK; | |
| 382 } | |
| 383 | |
| 384 /* unlock name mutex */ | |
| 385 | |
| 386 if (rc == NGX_AGAIN) { | |
| 387 return NGX_OK; | |
| 388 } | |
| 389 | |
|
1904
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parents:
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diff
changeset
|
390 /* NGX_ERROR */ |
| 1649 | 391 |
| 392 if (ctx->event) { | |
|
1904
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1903
diff
changeset
|
393 ngx_resolver_free(r, ctx->event); |
| 1649 | 394 } |
| 395 | |
|
1904
538f06aa8118
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Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
396 ngx_resolver_free(r, ctx); |
| 1649 | 397 |
| 398 return NGX_ERROR; | |
| 399 } | |
| 400 | |
| 401 | |
| 402 void | |
| 403 ngx_resolve_name_done(ngx_resolver_ctx_t *ctx) | |
| 404 { | |
| 405 ngx_resolver_t *r; | |
| 406 ngx_resolver_ctx_t *w, **p; | |
| 407 ngx_resolver_node_t *rn; | |
| 408 | |
| 409 r = ctx->resolver; | |
| 410 | |
| 411 ngx_log_debug1(NGX_LOG_DEBUG_CORE, r->log, 0, | |
| 412 "resolve name done: %i", ctx->state); | |
| 413 | |
| 414 if (ctx->quick) { | |
| 415 return; | |
| 416 } | |
| 417 | |
| 418 if (ctx->event && ctx->event->timer_set) { | |
| 419 ngx_del_timer(ctx->event); | |
| 420 } | |
| 421 | |
| 422 /* lock name mutex */ | |
| 423 | |
|
6356
f63dd04c1580
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parents:
6355
diff
changeset
|
424 if (ctx->state == NGX_AGAIN || ctx->state == NGX_RESOLVE_TIMEDOUT) { |
| 1649 | 425 |
|
6359
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Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
426 rn = ctx->node; |
| 1649 | 427 |
| 428 if (rn) { | |
| 429 p = &rn->waiting; | |
| 430 w = rn->waiting; | |
| 431 | |
| 432 while (w) { | |
| 433 if (w == ctx) { | |
| 434 *p = w->next; | |
| 435 | |
| 436 goto done; | |
| 437 } | |
| 438 | |
| 439 p = &w->next; | |
| 440 w = w->next; | |
| 441 } | |
| 442 } | |
| 443 | |
| 444 ngx_log_error(NGX_LOG_ALERT, r->log, 0, | |
| 445 "could not cancel %V resolving", &ctx->name); | |
| 446 } | |
| 447 | |
| 448 done: | |
| 449 | |
| 450 ngx_resolver_expire(r, &r->name_rbtree, &r->name_expire_queue); | |
| 451 | |
| 452 /* unlock name mutex */ | |
| 453 | |
|
1904
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diff
changeset
|
454 /* lock alloc mutex */ |
|
538f06aa8118
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diff
changeset
|
455 |
|
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
456 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
|
457 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
|
458 } |
|
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
459 |
|
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
460 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
|
461 |
|
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
462 /* unlock alloc mutex */ |
| 1649 | 463 } |
| 464 | |
| 465 | |
| 466 static ngx_int_t | |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
467 ngx_resolve_name_locked(ngx_resolver_t *r, ngx_resolver_ctx_t *ctx, |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
468 ngx_str_t *name) |
| 1649 | 469 { |
| 470 uint32_t hash; | |
|
1961
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
471 ngx_int_t rc; |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
472 ngx_str_t cname; |
| 1649 | 473 ngx_uint_t naddrs; |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
474 ngx_addr_t *addrs; |
|
6357
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
475 ngx_resolver_ctx_t *next, *last; |
| 1649 | 476 ngx_resolver_node_t *rn; |
| 477 | |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
478 ngx_strlow(name->data, name->data, name->len); |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
479 |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
480 hash = ngx_crc32_short(name->data, name->len); |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
481 |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
482 rn = ngx_resolver_lookup_name(r, name, hash); |
| 1649 | 483 |
| 484 if (rn) { | |
| 485 | |
|
6357
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
486 /* ctx can be a list after NGX_RESOLVE_CNAME */ |
|
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
487 for (last = ctx; last->next; last = last->next); |
|
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
488 |
| 1649 | 489 if (rn->valid >= ngx_time()) { |
| 490 | |
| 491 ngx_log_debug0(NGX_LOG_DEBUG_CORE, r->log, 0, "resolve cached"); | |
| 492 | |
| 493 ngx_queue_remove(&rn->queue); | |
| 494 | |
| 495 rn->expire = ngx_time() + r->expire; | |
| 496 | |
| 497 ngx_queue_insert_head(&r->name_expire_queue, &rn->queue); | |
| 498 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
499 naddrs = (rn->naddrs == (u_short) -1) ? 0 : rn->naddrs; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
500 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
501 naddrs += (rn->naddrs6 == (u_short) -1) ? 0 : rn->naddrs6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
502 #endif |
| 1649 | 503 |
| 504 if (naddrs) { | |
| 505 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
506 if (naddrs == 1 && rn->naddrs == 1) { |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
507 addrs = NULL; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
508 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
509 } else { |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
510 addrs = ngx_resolver_export(r, rn, 1); |
| 1649 | 511 if (addrs == NULL) { |
| 512 return NGX_ERROR; | |
| 513 } | |
| 514 } | |
| 515 | |
|
6357
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
516 last->next = rn->waiting; |
| 1649 | 517 rn->waiting = NULL; |
| 518 | |
| 519 /* unlock name mutex */ | |
| 520 | |
| 521 do { | |
| 522 ctx->state = NGX_OK; | |
| 523 ctx->naddrs = naddrs; | |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
524 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
525 if (addrs == NULL) { |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
526 ctx->addrs = &ctx->addr; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
527 ctx->addr.sockaddr = (struct sockaddr *) &ctx->sin; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
528 ctx->addr.socklen = sizeof(struct sockaddr_in); |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
529 ngx_memzero(&ctx->sin, sizeof(struct sockaddr_in)); |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
530 ctx->sin.sin_family = AF_INET; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
531 ctx->sin.sin_addr.s_addr = rn->u.addr; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
532 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
533 } else { |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
534 ctx->addrs = addrs; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
535 } |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
536 |
| 1649 | 537 next = ctx->next; |
| 538 | |
| 539 ctx->handler(ctx); | |
| 540 | |
| 541 ctx = next; | |
| 542 } while (ctx); | |
| 543 | |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
544 if (addrs != NULL) { |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
545 ngx_resolver_free(r, addrs->sockaddr); |
| 1649 | 546 ngx_resolver_free(r, addrs); |
| 547 } | |
| 548 | |
| 549 return NGX_OK; | |
| 550 } | |
| 551 | |
| 552 /* NGX_RESOLVE_CNAME */ | |
| 553 | |
| 1969 | 554 if (ctx->recursion++ < NGX_RESOLVER_MAX_RECURSION) { |
| 555 | |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
556 cname.len = rn->cnlen; |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
557 cname.data = rn->u.cname; |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
558 |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
559 return ngx_resolve_name_locked(r, ctx, &cname); |
| 1969 | 560 } |
| 561 | |
|
6357
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
562 last->next = rn->waiting; |
| 1969 | 563 rn->waiting = NULL; |
| 564 | |
| 565 /* unlock name mutex */ | |
| 566 | |
| 567 do { | |
| 568 ctx->state = NGX_RESOLVE_NXDOMAIN; | |
| 569 next = ctx->next; | |
| 570 | |
| 571 ctx->handler(ctx); | |
| 572 | |
| 573 ctx = next; | |
| 574 } while (ctx); | |
| 575 | |
| 576 return NGX_OK; | |
| 1649 | 577 } |
| 578 | |
| 579 if (rn->waiting) { | |
| 580 | |
|
6356
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
581 if (ctx->event == NULL) { |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
582 ctx->event = ngx_resolver_calloc(r, sizeof(ngx_event_t)); |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
583 if (ctx->event == NULL) { |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
584 return NGX_ERROR; |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
585 } |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
586 |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
587 ctx->event->handler = ngx_resolver_timeout_handler; |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
588 ctx->event->data = ctx; |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
589 ctx->event->log = r->log; |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
590 ctx->ident = -1; |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
591 |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
592 ngx_add_timer(ctx->event, ctx->timeout); |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
593 } |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
594 |
|
6357
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
595 last->next = rn->waiting; |
| 1649 | 596 rn->waiting = ctx; |
| 3297 | 597 ctx->state = NGX_AGAIN; |
| 1649 | 598 |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
599 do { |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
600 ctx->node = rn; |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
601 ctx = ctx->next; |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
602 } while (ctx); |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
603 |
| 1649 | 604 return NGX_AGAIN; |
| 605 } | |
| 606 | |
| 607 ngx_queue_remove(&rn->queue); | |
| 608 | |
| 609 /* lock alloc mutex */ | |
| 610 | |
|
4619
3171ec7d0d05
Resolver: protection from duplicate responses.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4610
diff
changeset
|
611 if (rn->query) { |
|
3171ec7d0d05
Resolver: protection from duplicate responses.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4610
diff
changeset
|
612 ngx_resolver_free_locked(r, rn->query); |
|
3171ec7d0d05
Resolver: protection from duplicate responses.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4610
diff
changeset
|
613 rn->query = NULL; |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
614 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
615 rn->query6 = NULL; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
616 #endif |
|
4619
3171ec7d0d05
Resolver: protection from duplicate responses.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4610
diff
changeset
|
617 } |
| 1649 | 618 |
| 619 if (rn->cnlen) { | |
| 620 ngx_resolver_free_locked(r, rn->u.cname); | |
| 621 } | |
| 622 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
623 if (rn->naddrs > 1 && rn->naddrs != (u_short) -1) { |
| 1649 | 624 ngx_resolver_free_locked(r, rn->u.addrs); |
| 625 } | |
| 626 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
627 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
628 if (rn->naddrs6 > 1 && rn->naddrs6 != (u_short) -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
629 ngx_resolver_free_locked(r, rn->u6.addrs6); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
630 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
631 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
632 |
| 1649 | 633 /* unlock alloc mutex */ |
| 634 | |
| 635 } else { | |
| 636 | |
| 637 rn = ngx_resolver_alloc(r, sizeof(ngx_resolver_node_t)); | |
| 638 if (rn == NULL) { | |
| 639 return NGX_ERROR; | |
| 640 } | |
| 641 | |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
642 rn->name = ngx_resolver_dup(r, name->data, name->len); |
| 1649 | 643 if (rn->name == NULL) { |
| 644 ngx_resolver_free(r, rn); | |
| 645 return NGX_ERROR; | |
| 646 } | |
| 647 | |
| 648 rn->node.key = hash; | |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
649 rn->nlen = (u_short) name->len; |
|
1960
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
650 rn->query = NULL; |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
651 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
652 rn->query6 = NULL; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
653 #endif |
| 1649 | 654 |
| 655 ngx_rbtree_insert(&r->name_rbtree, &rn->node); | |
| 656 } | |
| 657 | |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
658 rc = ngx_resolver_create_name_query(r, rn, name); |
|
1961
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
659 |
|
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
660 if (rc == NGX_ERROR) { |
| 1649 | 661 goto failed; |
| 662 } | |
| 663 | |
|
1961
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
664 if (rc == NGX_DECLINED) { |
|
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
665 ngx_rbtree_delete(&r->name_rbtree, &rn->node); |
|
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
666 |
|
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
667 ngx_resolver_free(r, rn->query); |
|
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
668 ngx_resolver_free(r, rn->name); |
|
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
669 ngx_resolver_free(r, rn); |
|
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
670 |
|
6357
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
671 do { |
|
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
672 ctx->state = NGX_RESOLVE_NXDOMAIN; |
|
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
673 next = ctx->next; |
|
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
674 |
|
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
675 ctx->handler(ctx); |
|
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
676 |
|
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
677 ctx = next; |
|
838946300825
Resolver: fixed CNAME processing for several requests.
Ruslan Ermilov <ru@nginx.com>
parents:
6356
diff
changeset
|
678 } while (ctx); |
|
1961
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
679 |
|
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
680 return NGX_OK; |
|
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
681 } |
|
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
682 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
683 rn->naddrs = (u_short) -1; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
684 #if (NGX_HAVE_INET6) |
|
5478
3cb3175a6fef
The "ipv6=" boolean parameter of the "resolver" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
5477
diff
changeset
|
685 rn->naddrs6 = r->ipv6 ? (u_short) -1 : 0; |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
686 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
687 |
| 1649 | 688 if (ngx_resolver_send_query(r, rn) != NGX_OK) { |
| 689 goto failed; | |
| 690 } | |
| 691 | |
| 692 if (ctx->event == NULL) { | |
| 693 ctx->event = ngx_resolver_calloc(r, sizeof(ngx_event_t)); | |
| 694 if (ctx->event == NULL) { | |
| 695 goto failed; | |
| 696 } | |
| 697 | |
| 698 ctx->event->handler = ngx_resolver_timeout_handler; | |
|
6356
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
699 ctx->event->data = ctx; |
| 1649 | 700 ctx->event->log = r->log; |
|
6356
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
701 ctx->ident = -1; |
| 1649 | 702 |
| 703 ngx_add_timer(ctx->event, ctx->timeout); | |
| 704 } | |
| 705 | |
| 706 if (ngx_queue_empty(&r->name_resend_queue)) { | |
| 707 ngx_add_timer(r->event, (ngx_msec_t) (r->resend_timeout * 1000)); | |
| 708 } | |
| 709 | |
| 710 rn->expire = ngx_time() + r->resend_timeout; | |
| 711 | |
| 712 ngx_queue_insert_head(&r->name_resend_queue, &rn->queue); | |
| 713 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
714 rn->code = 0; |
| 1649 | 715 rn->cnlen = 0; |
| 716 rn->valid = 0; | |
|
5485
8958656a8060
Resolver: use minimum TTL for caching (ticket #329).
Ruslan Ermilov <ru@nginx.com>
parents:
5479
diff
changeset
|
717 rn->ttl = NGX_MAX_UINT32_VALUE; |
| 1649 | 718 rn->waiting = ctx; |
| 719 | |
| 720 ctx->state = NGX_AGAIN; | |
| 721 | |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
722 do { |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
723 ctx->node = rn; |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
724 ctx = ctx->next; |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
725 } while (ctx); |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
726 |
| 1649 | 727 return NGX_AGAIN; |
| 728 | |
| 729 failed: | |
| 730 | |
| 731 ngx_rbtree_delete(&r->name_rbtree, &rn->node); | |
| 732 | |
|
1960
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
733 if (rn->query) { |
|
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
734 ngx_resolver_free(r, rn->query); |
|
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
735 } |
|
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
736 |
| 1649 | 737 ngx_resolver_free(r, rn->name); |
| 738 | |
| 739 ngx_resolver_free(r, rn); | |
| 740 | |
| 741 return NGX_ERROR; | |
| 742 } | |
| 583 | 743 |
| 744 | |
| 745 ngx_int_t | |
| 1649 | 746 ngx_resolve_addr(ngx_resolver_ctx_t *ctx) |
| 747 { | |
|
2484
cf3cd450049c
store name pointer in variable allocated on stack
Igor Sysoev <igor@sysoev.ru>
parents:
2483
diff
changeset
|
748 u_char *name; |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
749 in_addr_t addr; |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
750 ngx_queue_t *resend_queue, *expire_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
751 ngx_rbtree_t *tree; |
| 1649 | 752 ngx_resolver_t *r; |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
753 struct sockaddr_in *sin; |
| 1649 | 754 ngx_resolver_node_t *rn; |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
755 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
756 uint32_t hash; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
757 struct sockaddr_in6 *sin6; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
758 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
759 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
760 #if (NGX_SUPPRESS_WARN) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
761 addr = 0; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
762 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
763 hash = 0; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
764 sin6 = NULL; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
765 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
766 #endif |
| 1649 | 767 |
| 768 r = ctx->resolver; | |
| 769 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
770 switch (ctx->addr.sockaddr->sa_family) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
771 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
772 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
773 case AF_INET6: |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
774 sin6 = (struct sockaddr_in6 *) ctx->addr.sockaddr; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
775 hash = ngx_crc32_short(sin6->sin6_addr.s6_addr, 16); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
776 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
777 /* lock addr mutex */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
778 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
779 rn = ngx_resolver_lookup_addr6(r, &sin6->sin6_addr, hash); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
780 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
781 tree = &r->addr6_rbtree; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
782 resend_queue = &r->addr6_resend_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
783 expire_queue = &r->addr6_expire_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
784 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
785 break; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
786 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
787 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
788 default: /* AF_INET */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
789 sin = (struct sockaddr_in *) ctx->addr.sockaddr; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
790 addr = ntohl(sin->sin_addr.s_addr); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
791 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
792 /* lock addr mutex */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
793 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
794 rn = ngx_resolver_lookup_addr(r, addr); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
795 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
796 tree = &r->addr_rbtree; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
797 resend_queue = &r->addr_resend_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
798 expire_queue = &r->addr_expire_queue; |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
799 } |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
800 |
| 1649 | 801 if (rn) { |
| 802 | |
| 803 if (rn->valid >= ngx_time()) { | |
| 804 | |
| 805 ngx_log_debug0(NGX_LOG_DEBUG_CORE, r->log, 0, "resolve cached"); | |
| 806 | |
| 807 ngx_queue_remove(&rn->queue); | |
| 808 | |
| 809 rn->expire = ngx_time() + r->expire; | |
| 810 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
811 ngx_queue_insert_head(expire_queue, &rn->queue); |
| 1649 | 812 |
|
2484
cf3cd450049c
store name pointer in variable allocated on stack
Igor Sysoev <igor@sysoev.ru>
parents:
2483
diff
changeset
|
813 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
|
814 if (name == NULL) { |
| 1649 | 815 goto failed; |
| 816 } | |
| 817 | |
|
2484
cf3cd450049c
store name pointer in variable allocated on stack
Igor Sysoev <igor@sysoev.ru>
parents:
2483
diff
changeset
|
818 ctx->name.len = rn->nlen; |
|
cf3cd450049c
store name pointer in variable allocated on stack
Igor Sysoev <igor@sysoev.ru>
parents:
2483
diff
changeset
|
819 ctx->name.data = name; |
|
cf3cd450049c
store name pointer in variable allocated on stack
Igor Sysoev <igor@sysoev.ru>
parents:
2483
diff
changeset
|
820 |
| 1649 | 821 /* unlock addr mutex */ |
| 822 | |
| 823 ctx->state = NGX_OK; | |
| 824 | |
| 825 ctx->handler(ctx); | |
| 826 | |
|
2484
cf3cd450049c
store name pointer in variable allocated on stack
Igor Sysoev <igor@sysoev.ru>
parents:
2483
diff
changeset
|
827 ngx_resolver_free(r, name); |
| 1649 | 828 |
| 829 return NGX_OK; | |
| 830 } | |
| 831 | |
| 832 if (rn->waiting) { | |
| 833 | |
|
6356
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
834 ctx->event = ngx_resolver_calloc(r, sizeof(ngx_event_t)); |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
835 if (ctx->event == NULL) { |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
836 return NGX_ERROR; |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
837 } |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
838 |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
839 ctx->event->handler = ngx_resolver_timeout_handler; |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
840 ctx->event->data = ctx; |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
841 ctx->event->log = r->log; |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
842 ctx->ident = -1; |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
843 |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
844 ngx_add_timer(ctx->event, ctx->timeout); |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
845 |
| 1649 | 846 ctx->next = rn->waiting; |
| 847 rn->waiting = ctx; | |
| 3297 | 848 ctx->state = NGX_AGAIN; |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
849 ctx->node = rn; |
| 1649 | 850 |
|
2487
9b4dce95c744
fix return code, this fixes segfault when two or more
Igor Sysoev <igor@sysoev.ru>
parents:
2486
diff
changeset
|
851 /* unlock addr mutex */ |
|
9b4dce95c744
fix return code, this fixes segfault when two or more
Igor Sysoev <igor@sysoev.ru>
parents:
2486
diff
changeset
|
852 |
|
9b4dce95c744
fix return code, this fixes segfault when two or more
Igor Sysoev <igor@sysoev.ru>
parents:
2486
diff
changeset
|
853 return NGX_OK; |
| 1649 | 854 } |
| 855 | |
| 856 ngx_queue_remove(&rn->queue); | |
| 857 | |
| 858 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
|
859 rn->query = NULL; |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
860 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
861 rn->query6 = NULL; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
862 #endif |
| 1649 | 863 |
| 864 } else { | |
| 865 rn = ngx_resolver_alloc(r, sizeof(ngx_resolver_node_t)); | |
| 866 if (rn == NULL) { | |
| 867 goto failed; | |
| 868 } | |
| 869 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
870 switch (ctx->addr.sockaddr->sa_family) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
871 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
872 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
873 case AF_INET6: |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
874 rn->addr6 = sin6->sin6_addr; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
875 rn->node.key = hash; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
876 break; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
877 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
878 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
879 default: /* AF_INET */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
880 rn->node.key = addr; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
881 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
882 |
|
1960
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
883 rn->query = NULL; |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
884 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
885 rn->query6 = NULL; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
886 #endif |
| 1649 | 887 |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
888 ngx_rbtree_insert(tree, &rn->node); |
| 1649 | 889 } |
| 890 | |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
891 if (ngx_resolver_create_addr_query(r, rn, &ctx->addr) != NGX_OK) { |
| 1649 | 892 goto failed; |
| 893 } | |
| 894 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
895 rn->naddrs = (u_short) -1; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
896 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
897 rn->naddrs6 = (u_short) -1; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
898 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
899 |
| 1649 | 900 if (ngx_resolver_send_query(r, rn) != NGX_OK) { |
| 901 goto failed; | |
| 902 } | |
| 903 | |
| 904 ctx->event = ngx_resolver_calloc(r, sizeof(ngx_event_t)); | |
| 905 if (ctx->event == NULL) { | |
| 906 goto failed; | |
| 907 } | |
| 908 | |
| 909 ctx->event->handler = ngx_resolver_timeout_handler; | |
|
6356
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
910 ctx->event->data = ctx; |
| 1649 | 911 ctx->event->log = r->log; |
|
6356
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
912 ctx->ident = -1; |
| 1649 | 913 |
| 914 ngx_add_timer(ctx->event, ctx->timeout); | |
| 915 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
916 if (ngx_queue_empty(resend_queue)) { |
| 1649 | 917 ngx_add_timer(r->event, (ngx_msec_t) (r->resend_timeout * 1000)); |
| 918 } | |
| 919 | |
| 920 rn->expire = ngx_time() + r->resend_timeout; | |
| 921 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
922 ngx_queue_insert_head(resend_queue, &rn->queue); |
| 1649 | 923 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
924 rn->code = 0; |
| 1649 | 925 rn->cnlen = 0; |
| 926 rn->name = NULL; | |
| 927 rn->nlen = 0; | |
| 928 rn->valid = 0; | |
|
5485
8958656a8060
Resolver: use minimum TTL for caching (ticket #329).
Ruslan Ermilov <ru@nginx.com>
parents:
5479
diff
changeset
|
929 rn->ttl = NGX_MAX_UINT32_VALUE; |
| 1649 | 930 rn->waiting = ctx; |
| 931 | |
| 932 /* unlock addr mutex */ | |
| 933 | |
| 934 ctx->state = NGX_AGAIN; | |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
935 ctx->node = rn; |
| 1649 | 936 |
| 937 return NGX_OK; | |
| 938 | |
| 939 failed: | |
| 940 | |
| 941 if (rn) { | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
942 ngx_rbtree_delete(tree, &rn->node); |
| 1649 | 943 |
|
1960
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
944 if (rn->query) { |
|
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
945 ngx_resolver_free(r, rn->query); |
|
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
946 } |
|
1609b3c3d604
fix memory leak on resolver query send failure
Igor Sysoev <igor@sysoev.ru>
parents:
1914
diff
changeset
|
947 |
| 1649 | 948 ngx_resolver_free(r, rn); |
| 949 } | |
| 950 | |
| 951 /* unlock addr mutex */ | |
| 952 | |
| 953 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
|
954 ngx_resolver_free(r, ctx->event); |
| 1649 | 955 } |
| 956 | |
|
1904
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
957 ngx_resolver_free(r, ctx); |
| 1649 | 958 |
| 959 return NGX_ERROR; | |
| 960 } | |
| 961 | |
| 962 | |
| 963 void | |
| 964 ngx_resolve_addr_done(ngx_resolver_ctx_t *ctx) | |
| 965 { | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
966 ngx_queue_t *expire_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
967 ngx_rbtree_t *tree; |
| 1649 | 968 ngx_resolver_t *r; |
| 969 ngx_resolver_ctx_t *w, **p; | |
| 970 ngx_resolver_node_t *rn; | |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
971 |
| 1649 | 972 r = ctx->resolver; |
| 973 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
974 switch (ctx->addr.sockaddr->sa_family) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
975 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
976 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
977 case AF_INET6: |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
978 tree = &r->addr6_rbtree; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
979 expire_queue = &r->addr6_expire_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
980 break; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
981 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
982 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
983 default: /* AF_INET */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
984 tree = &r->addr_rbtree; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
985 expire_queue = &r->addr_expire_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
986 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
987 |
| 1649 | 988 ngx_log_debug1(NGX_LOG_DEBUG_CORE, r->log, 0, |
| 989 "resolve addr done: %i", ctx->state); | |
| 990 | |
| 991 if (ctx->event && ctx->event->timer_set) { | |
| 992 ngx_del_timer(ctx->event); | |
| 993 } | |
| 994 | |
| 995 /* lock addr mutex */ | |
| 996 | |
|
6356
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
997 if (ctx->state == NGX_AGAIN || ctx->state == NGX_RESOLVE_TIMEDOUT) { |
| 1649 | 998 |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
999 rn = ctx->node; |
| 1649 | 1000 |
| 1001 if (rn) { | |
| 1002 p = &rn->waiting; | |
| 1003 w = rn->waiting; | |
| 1004 | |
| 1005 while (w) { | |
| 1006 if (w == ctx) { | |
| 1007 *p = w->next; | |
| 1008 | |
| 1009 goto done; | |
| 1010 } | |
| 1011 | |
| 1012 p = &w->next; | |
| 1013 w = w->next; | |
| 1014 } | |
| 1015 } | |
| 1016 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1017 { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1018 u_char text[NGX_SOCKADDR_STRLEN]; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1019 ngx_str_t addrtext; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1020 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1021 addrtext.data = text; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1022 addrtext.len = ngx_sock_ntop(ctx->addr.sockaddr, ctx->addr.socklen, |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1023 text, NGX_SOCKADDR_STRLEN, 0); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1024 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1025 ngx_log_error(NGX_LOG_ALERT, r->log, 0, |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1026 "could not cancel %V resolving", &addrtext); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1027 } |
| 1649 | 1028 } |
| 1029 | |
| 1030 done: | |
| 1031 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1032 ngx_resolver_expire(r, tree, expire_queue); |
| 1649 | 1033 |
| 1034 /* unlock addr mutex */ | |
| 1035 | |
|
1904
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
1036 /* 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
|
1037 |
|
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
1038 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
|
1039 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
|
1040 } |
|
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
1041 |
|
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
1042 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
|
1043 |
|
538f06aa8118
fix memory leaks, use unlocked ngx_resolver_free() for seldom failed cases
Igor Sysoev <igor@sysoev.ru>
parents:
1903
diff
changeset
|
1044 /* unlock alloc mutex */ |
| 1649 | 1045 } |
| 1046 | |
| 1047 | |
| 1048 static void | |
| 1049 ngx_resolver_expire(ngx_resolver_t *r, ngx_rbtree_t *tree, ngx_queue_t *queue) | |
| 1050 { | |
| 1051 time_t now; | |
| 1052 ngx_uint_t i; | |
| 1053 ngx_queue_t *q; | |
| 1054 ngx_resolver_node_t *rn; | |
| 1055 | |
| 1056 ngx_log_debug0(NGX_LOG_DEBUG_CORE, r->log, 0, "resolver expire"); | |
| 1057 | |
| 1058 now = ngx_time(); | |
| 1059 | |
| 1060 for (i = 0; i < 2; i++) { | |
| 1061 if (ngx_queue_empty(queue)) { | |
| 1062 return; | |
| 1063 } | |
| 1064 | |
| 1065 q = ngx_queue_last(queue); | |
| 1066 | |
| 1067 rn = ngx_queue_data(q, ngx_resolver_node_t, queue); | |
| 1068 | |
| 1069 if (now <= rn->expire) { | |
| 1070 return; | |
| 1071 } | |
| 1072 | |
| 1774 | 1073 ngx_log_debug2(NGX_LOG_DEBUG_CORE, r->log, 0, |
| 1074 "resolver expire \"%*s\"", (size_t) rn->nlen, rn->name); | |
| 1649 | 1075 |
| 1076 ngx_queue_remove(q); | |
| 1077 | |
| 1078 ngx_rbtree_delete(tree, &rn->node); | |
| 1079 | |
| 1080 ngx_resolver_free_node(r, rn); | |
| 1081 } | |
| 1082 } | |
| 1083 | |
| 1084 | |
| 1085 static ngx_int_t | |
| 1086 ngx_resolver_send_query(ngx_resolver_t *r, ngx_resolver_node_t *rn) | |
| 1087 { | |
| 1088 ssize_t n; | |
| 1089 ngx_udp_connection_t *uc; | |
| 1090 | |
|
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
1091 uc = r->udp_connections.elts; |
|
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
1092 |
|
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
1093 uc = &uc[r->last_connection++]; |
|
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
1094 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
|
1095 r->last_connection = 0; |
|
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3902
diff
changeset
|
1096 } |
| 1649 | 1097 |
| 1098 if (uc->connection == NULL) { | |
|
4496
be6c250b827b
Fixed null pointer dereference in resolver (ticket #91).
Maxim Dounin <mdounin@mdounin.ru>
parents:
4474
diff
changeset
|
1099 |
|
be6c250b827b
Fixed null pointer dereference in resolver (ticket #91).
Maxim Dounin <mdounin@mdounin.ru>
parents:
4474
diff
changeset
|
1100 uc->log = *r->log; |
|
be6c250b827b
Fixed null pointer dereference in resolver (ticket #91).
Maxim Dounin <mdounin@mdounin.ru>
parents:
4474
diff
changeset
|
1101 uc->log.handler = ngx_resolver_log_error; |
|
be6c250b827b
Fixed null pointer dereference in resolver (ticket #91).
Maxim Dounin <mdounin@mdounin.ru>
parents:
4474
diff
changeset
|
1102 uc->log.data = uc; |
|
be6c250b827b
Fixed null pointer dereference in resolver (ticket #91).
Maxim Dounin <mdounin@mdounin.ru>
parents:
4474
diff
changeset
|
1103 uc->log.action = "resolving"; |
|
be6c250b827b
Fixed null pointer dereference in resolver (ticket #91).
Maxim Dounin <mdounin@mdounin.ru>
parents:
4474
diff
changeset
|
1104 |
| 1649 | 1105 if (ngx_udp_connect(uc) != NGX_OK) { |
| 1106 return NGX_ERROR; | |
| 1107 } | |
| 1108 | |
| 1109 uc->connection->data = r; | |
| 1110 uc->connection->read->handler = ngx_resolver_read_response; | |
| 1906 | 1111 uc->connection->read->resolver = 1; |
| 1649 | 1112 } |
| 1113 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1114 if (rn->naddrs == (u_short) -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1115 n = ngx_send(uc->connection, rn->query, rn->qlen); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1116 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1117 if (n == -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1118 return NGX_ERROR; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1119 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1120 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1121 if ((size_t) n != (size_t) rn->qlen) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1122 ngx_log_error(NGX_LOG_CRIT, &uc->log, 0, "send() incomplete"); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1123 return NGX_ERROR; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1124 } |
| 1649 | 1125 } |
| 1126 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1127 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1128 if (rn->query6 && rn->naddrs6 == (u_short) -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1129 n = ngx_send(uc->connection, rn->query6, rn->qlen); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1130 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1131 if (n == -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1132 return NGX_ERROR; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1133 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1134 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1135 if ((size_t) n != (size_t) rn->qlen) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1136 ngx_log_error(NGX_LOG_CRIT, &uc->log, 0, "send() incomplete"); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1137 return NGX_ERROR; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1138 } |
| 1649 | 1139 } |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1140 #endif |
| 1649 | 1141 |
| 1142 return NGX_OK; | |
| 1143 } | |
| 1144 | |
| 1145 | |
| 1146 static void | |
| 1147 ngx_resolver_resend_handler(ngx_event_t *ev) | |
| 1148 { | |
| 1149 time_t timer, atimer, ntimer; | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1150 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1151 time_t a6timer; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1152 #endif |
| 1649 | 1153 ngx_resolver_t *r; |
| 1154 | |
| 1155 r = ev->data; | |
| 1156 | |
| 1157 ngx_log_debug0(NGX_LOG_DEBUG_CORE, r->log, 0, | |
| 1158 "resolver resend handler"); | |
| 1159 | |
| 1160 /* lock name mutex */ | |
| 1161 | |
| 1162 ntimer = ngx_resolver_resend(r, &r->name_rbtree, &r->name_resend_queue); | |
| 1163 | |
| 1164 /* unlock name mutex */ | |
| 1165 | |
| 1166 /* lock addr mutex */ | |
| 1167 | |
| 1168 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
|
1169 |
| 1649 | 1170 /* unlock addr mutex */ |
| 1171 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1172 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1173 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1174 /* lock addr6 mutex */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1175 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1176 a6timer = ngx_resolver_resend(r, &r->addr6_rbtree, &r->addr6_resend_queue); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1177 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1178 /* unlock addr6 mutex */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1179 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1180 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1181 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1182 timer = ntimer; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1183 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1184 if (timer == 0) { |
| 1649 | 1185 timer = atimer; |
| 1186 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1187 } else if (atimer) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1188 timer = ngx_min(timer, atimer); |
| 1649 | 1189 } |
| 1190 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1191 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1192 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1193 if (timer == 0) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1194 timer = a6timer; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1195 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1196 } else if (a6timer) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1197 timer = ngx_min(timer, a6timer); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1198 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1199 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1200 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
1201 |
| 1649 | 1202 if (timer) { |
| 1203 ngx_add_timer(r->event, (ngx_msec_t) (timer * 1000)); | |
| 1204 } | |
| 1205 } | |
| 1206 | |
| 1207 | |
| 1208 static time_t | |
| 1209 ngx_resolver_resend(ngx_resolver_t *r, ngx_rbtree_t *tree, ngx_queue_t *queue) | |
| 1210 { | |
| 1211 time_t now; | |
| 1212 ngx_queue_t *q; | |
| 1213 ngx_resolver_node_t *rn; | |
| 1214 | |
| 1215 now = ngx_time(); | |
| 1216 | |
| 1217 for ( ;; ) { | |
| 1218 if (ngx_queue_empty(queue)) { | |
| 1219 return 0; | |
| 1220 } | |
| 1221 | |
| 1222 q = ngx_queue_last(queue); | |
| 1223 | |
| 1224 rn = ngx_queue_data(q, ngx_resolver_node_t, queue); | |
| 1225 | |
| 1226 if (now < rn->expire) { | |
| 1227 return rn->expire - now; | |
| 1228 } | |
| 1229 | |
| 1774 | 1230 ngx_log_debug3(NGX_LOG_DEBUG_CORE, r->log, 0, |
| 1231 "resolver resend \"%*s\" %p", | |
| 1232 (size_t) rn->nlen, rn->name, rn->waiting); | |
| 1649 | 1233 |
| 1234 ngx_queue_remove(q); | |
| 1235 | |
| 1236 if (rn->waiting) { | |
| 1237 | |
|
4683
84d8e60b65f0
Fixed crash in ngx_resolver_cleanup_tree().
Ruslan Ermilov <ru@nginx.com>
parents:
4671
diff
changeset
|
1238 (void) ngx_resolver_send_query(r, rn); |
|
84d8e60b65f0
Fixed crash in ngx_resolver_cleanup_tree().
Ruslan Ermilov <ru@nginx.com>
parents:
4671
diff
changeset
|
1239 |
|
84d8e60b65f0
Fixed crash in ngx_resolver_cleanup_tree().
Ruslan Ermilov <ru@nginx.com>
parents:
4671
diff
changeset
|
1240 rn->expire = now + r->resend_timeout; |
|
84d8e60b65f0
Fixed crash in ngx_resolver_cleanup_tree().
Ruslan Ermilov <ru@nginx.com>
parents:
4671
diff
changeset
|
1241 |
|
84d8e60b65f0
Fixed crash in ngx_resolver_cleanup_tree().
Ruslan Ermilov <ru@nginx.com>
parents:
4671
diff
changeset
|
1242 ngx_queue_insert_head(queue, q); |
|
1879
cf4ee321d195
do not delete failed DNS request if there are waiting clients
Igor Sysoev <igor@sysoev.ru>
parents:
1878
diff
changeset
|
1243 |
|
cf4ee321d195
do not delete failed DNS request if there are waiting clients
Igor Sysoev <igor@sysoev.ru>
parents:
1878
diff
changeset
|
1244 continue; |
| 1649 | 1245 } |
| 1246 | |
| 1247 ngx_rbtree_delete(tree, &rn->node); | |
| 1248 | |
| 1249 ngx_resolver_free_node(r, rn); | |
| 1250 } | |
| 1251 } | |
| 1252 | |
| 1253 | |
| 1254 static void | |
| 1255 ngx_resolver_read_response(ngx_event_t *rev) | |
| 1256 { | |
| 1257 ssize_t n; | |
| 1258 ngx_connection_t *c; | |
| 1259 u_char buf[NGX_RESOLVER_UDP_SIZE]; | |
| 1260 | |
| 1261 c = rev->data; | |
| 1262 | |
| 1263 do { | |
| 1689 | 1264 n = ngx_udp_recv(c, buf, NGX_RESOLVER_UDP_SIZE); |
| 1265 | |
| 1266 if (n < 0) { | |
| 1649 | 1267 return; |
| 1268 } | |
| 1269 | |
| 1270 ngx_resolver_process_response(c->data, buf, n); | |
| 1271 | |
| 1272 } while (rev->ready); | |
| 1273 } | |
| 1274 | |
| 1275 | |
| 1276 static void | |
| 1277 ngx_resolver_process_response(ngx_resolver_t *r, u_char *buf, size_t n) | |
| 1278 { | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1279 char *err; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1280 ngx_uint_t i, times, ident, qident, flags, code, nqs, nan, |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1281 qtype, qclass; |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1282 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1283 ngx_uint_t qident6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1284 #endif |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1285 ngx_queue_t *q; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1286 ngx_resolver_qs_t *qs; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1287 ngx_resolver_hdr_t *response; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1288 ngx_resolver_node_t *rn; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1289 |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1290 if (n < sizeof(ngx_resolver_hdr_t)) { |
| 1649 | 1291 goto short_response; |
| 1292 } | |
| 1293 | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1294 response = (ngx_resolver_hdr_t *) buf; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1295 |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1296 ident = (response->ident_hi << 8) + response->ident_lo; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1297 flags = (response->flags_hi << 8) + response->flags_lo; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1298 nqs = (response->nqs_hi << 8) + response->nqs_lo; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1299 nan = (response->nan_hi << 8) + response->nan_lo; |
| 1649 | 1300 |
| 1301 ngx_log_debug6(NGX_LOG_DEBUG_CORE, r->log, 0, | |
|
4653
134ccdf44647
Resolver: fixed format specification.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4643
diff
changeset
|
1302 "resolver DNS response %ui fl:%04Xui %ui/%ui/%ud/%ud", |
| 1649 | 1303 ident, flags, nqs, nan, |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1304 (response->nns_hi << 8) + response->nns_lo, |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1305 (response->nar_hi << 8) + response->nar_lo); |
| 1649 | 1306 |
|
5470
aebdca7e8f8f
Resolver: fixed response processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5469
diff
changeset
|
1307 /* response to a standard query */ |
|
aebdca7e8f8f
Resolver: fixed response processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5469
diff
changeset
|
1308 if ((flags & 0xf870) != 0x8000) { |
| 1649 | 1309 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
|
1310 "invalid DNS response %ui fl:%04Xui", ident, flags); |
| 1649 | 1311 return; |
| 1312 } | |
| 1313 | |
|
5470
aebdca7e8f8f
Resolver: fixed response processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5469
diff
changeset
|
1314 code = flags & 0xf; |
| 1649 | 1315 |
|
2282
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1316 if (code == NGX_RESOLVE_FORMERR) { |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1317 |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1318 times = 0; |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1319 |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1320 for (q = ngx_queue_head(&r->name_resend_queue); |
|
6355
c36482d0a79f
Resolver: fixed possible segmentation fault on DNS format error.
Roman Arutyunyan <arut@nginx.com>
parents:
5921
diff
changeset
|
1321 q != ngx_queue_sentinel(&r->name_resend_queue) && times++ < 100; |
|
2282
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1322 q = ngx_queue_next(q)) |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1323 { |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1324 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
|
1325 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
|
1326 |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1327 if (qident == ident) { |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1328 goto dns_error_name; |
|
2282
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1329 } |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1330 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1331 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1332 if (rn->query6) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1333 qident6 = (rn->query6[0] << 8) + rn->query6[1]; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1334 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1335 if (qident6 == ident) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1336 goto dns_error_name; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1337 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1338 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1339 #endif |
|
2282
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1340 } |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1341 |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1342 goto dns_error; |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1343 } |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1344 |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1345 if (code > NGX_RESOLVE_REFUSED) { |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1346 goto dns_error; |
| 1649 | 1347 } |
| 1348 | |
| 1349 if (nqs != 1) { | |
| 1350 err = "invalid number of questions in DNS response"; | |
| 1351 goto done; | |
| 1352 } | |
| 1353 | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1354 i = sizeof(ngx_resolver_hdr_t); |
| 1649 | 1355 |
| 1356 while (i < (ngx_uint_t) n) { | |
| 1357 if (buf[i] == '\0') { | |
| 1358 goto found; | |
| 1359 } | |
| 1360 | |
|
5470
aebdca7e8f8f
Resolver: fixed response processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5469
diff
changeset
|
1361 i += 1 + buf[i]; |
| 1649 | 1362 } |
| 1363 | |
| 1364 goto short_response; | |
| 1365 | |
| 1366 found: | |
| 1367 | |
|
5470
aebdca7e8f8f
Resolver: fixed response processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5469
diff
changeset
|
1368 if (i++ == sizeof(ngx_resolver_hdr_t)) { |
| 1649 | 1369 err = "zero-length domain name in DNS response"; |
| 1370 goto done; | |
| 1371 } | |
| 1372 | |
| 1373 if (i + sizeof(ngx_resolver_qs_t) + nan * (2 + sizeof(ngx_resolver_an_t)) | |
| 1374 > (ngx_uint_t) n) | |
| 1375 { | |
| 1376 goto short_response; | |
| 1377 } | |
| 1378 | |
| 1379 qs = (ngx_resolver_qs_t *) &buf[i]; | |
| 1380 | |
| 1381 qtype = (qs->type_hi << 8) + qs->type_lo; | |
| 1382 qclass = (qs->class_hi << 8) + qs->class_lo; | |
| 1383 | |
| 1384 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
|
1385 "resolver DNS response qt:%ui cl:%ui", qtype, qclass); |
| 1649 | 1386 |
| 1387 if (qclass != 1) { | |
| 1388 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
|
1389 "unknown query class %ui in DNS response", qclass); |
| 1649 | 1390 return; |
| 1391 } | |
| 1392 | |
| 1393 switch (qtype) { | |
| 1394 | |
| 1395 case NGX_RESOLVE_A: | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1396 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1397 case NGX_RESOLVE_AAAA: |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1398 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1399 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1400 ngx_resolver_process_a(r, buf, n, ident, code, qtype, nan, |
|
1742
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1401 i + sizeof(ngx_resolver_qs_t)); |
| 1649 | 1402 |
| 1403 break; | |
| 1404 | |
| 1405 case NGX_RESOLVE_PTR: | |
| 1406 | |
|
1742
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1407 ngx_resolver_process_ptr(r, buf, n, ident, code, nan); |
| 1649 | 1408 |
| 1409 break; | |
| 1410 | |
| 1411 default: | |
| 1412 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
|
1413 "unknown query type %ui in DNS response", qtype); |
| 1649 | 1414 return; |
| 1415 } | |
| 1416 | |
| 1417 return; | |
| 1418 | |
| 1419 short_response: | |
| 1420 | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1421 err = "short DNS response"; |
| 1649 | 1422 |
| 1423 done: | |
| 1424 | |
| 1425 ngx_log_error(r->log_level, r->log, 0, err); | |
| 1426 | |
| 1427 return; | |
|
2282
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1428 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1429 dns_error_name: |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1430 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1431 ngx_log_error(r->log_level, r->log, 0, |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1432 "DNS error (%ui: %s), query id:%ui, name:\"%*s\"", |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1433 code, ngx_resolver_strerror(code), ident, |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1434 rn->nlen, rn->name); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1435 return; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1436 |
|
2282
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1437 dns_error: |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1438 |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1439 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
|
1440 "DNS error (%ui: %s), query id:%ui", |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1441 code, ngx_resolver_strerror(code), ident); |
|
ec97eb9a8038
show name for a FORMERR DNS response
Igor Sysoev <igor@sysoev.ru>
parents:
2281
diff
changeset
|
1442 return; |
| 1649 | 1443 } |
| 1444 | |
| 1445 | |
| 1446 static void | |
| 1447 ngx_resolver_process_a(ngx_resolver_t *r, u_char *buf, size_t last, | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1448 ngx_uint_t ident, ngx_uint_t code, ngx_uint_t qtype, |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1449 ngx_uint_t nan, ngx_uint_t ans) |
| 583 | 1450 { |
| 1649 | 1451 char *err; |
| 1452 u_char *cname; | |
| 1453 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
|
1454 int32_t ttl; |
| 1649 | 1455 uint32_t hash; |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1456 in_addr_t *addr; |
| 1649 | 1457 ngx_str_t name; |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1458 ngx_addr_t *addrs; |
|
5471
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1459 ngx_uint_t type, class, qident, naddrs, a, i, n, start; |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1460 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1461 struct in6_addr *addr6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1462 #endif |
| 1649 | 1463 ngx_resolver_an_t *an; |
| 1464 ngx_resolver_ctx_t *ctx, *next; | |
| 1465 ngx_resolver_node_t *rn; | |
| 1466 | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1467 if (ngx_resolver_copy(r, &name, buf, |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1468 buf + sizeof(ngx_resolver_hdr_t), buf + last) |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1469 != NGX_OK) |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1470 { |
| 1649 | 1471 return; |
| 1472 } | |
| 1473 | |
| 1474 ngx_log_debug1(NGX_LOG_DEBUG_CORE, r->log, 0, "resolver qs:%V", &name); | |
| 1475 | |
| 1476 hash = ngx_crc32_short(name.data, name.len); | |
| 1477 | |
| 1478 /* lock name mutex */ | |
| 1479 | |
| 1480 rn = ngx_resolver_lookup_name(r, &name, hash); | |
| 1481 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1482 if (rn == NULL) { |
| 1649 | 1483 ngx_log_error(r->log_level, r->log, 0, |
| 1484 "unexpected response for %V", &name); | |
|
5471
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1485 ngx_resolver_free(r, name.data); |
| 1649 | 1486 goto failed; |
| 1487 } | |
| 1488 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1489 switch (qtype) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1490 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1491 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1492 case NGX_RESOLVE_AAAA: |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1493 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1494 if (rn->query6 == NULL || rn->naddrs6 != (u_short) -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1495 ngx_log_error(r->log_level, r->log, 0, |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1496 "unexpected response for %V", &name); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1497 ngx_resolver_free(r, name.data); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1498 goto failed; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1499 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1500 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1501 qident = (rn->query6[0] << 8) + rn->query6[1]; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1502 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1503 break; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1504 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1505 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1506 default: /* NGX_RESOLVE_A */ |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1507 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1508 if (rn->query == NULL || rn->naddrs != (u_short) -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1509 ngx_log_error(r->log_level, r->log, 0, |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1510 "unexpected response for %V", &name); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1511 ngx_resolver_free(r, name.data); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1512 goto failed; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1513 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1514 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1515 qident = (rn->query[0] << 8) + rn->query[1]; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1516 } |
| 1649 | 1517 |
| 1518 if (ident != qident) { | |
| 1519 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
|
1520 "wrong ident %ui response for %V, expect %ui", |
| 1649 | 1521 ident, &name, qident); |
|
5471
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1522 ngx_resolver_free(r, name.data); |
| 1649 | 1523 goto failed; |
| 1524 } | |
| 1525 | |
| 3139 | 1526 ngx_resolver_free(r, name.data); |
| 1527 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1528 if (code == 0 && rn->code) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1529 code = rn->code; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1530 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
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) { |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1533 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1534 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1535 switch (qtype) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1536 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1537 case NGX_RESOLVE_AAAA: |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1538 |
|
5768
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1539 rn->naddrs6 = 0; |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1540 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1541 if (rn->naddrs == (u_short) -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1542 goto next; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1543 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1544 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1545 if (rn->naddrs) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1546 goto export; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1547 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1548 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1549 break; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1550 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1551 default: /* NGX_RESOLVE_A */ |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1552 |
|
5768
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1553 rn->naddrs = 0; |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1554 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1555 if (rn->naddrs6 == (u_short) -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1556 goto next; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1557 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1558 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1559 if (rn->naddrs6) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1560 goto export; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1561 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1562 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1563 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1564 |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1565 code = NGX_RESOLVE_NXDOMAIN; |
|
1742
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1566 } |
|
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
1567 |
| 1649 | 1568 if (code) { |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1569 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1570 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1571 switch (qtype) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1572 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1573 case NGX_RESOLVE_AAAA: |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1574 |
|
5768
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1575 rn->naddrs6 = 0; |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1576 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1577 if (rn->naddrs == (u_short) -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1578 rn->code = (u_char) code; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1579 goto next; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1580 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1581 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1582 break; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1583 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1584 default: /* NGX_RESOLVE_A */ |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1585 |
|
5768
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1586 rn->naddrs = 0; |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1587 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1588 if (rn->naddrs6 == (u_short) -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1589 rn->code = (u_char) code; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1590 goto next; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1591 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1592 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1593 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1594 |
| 1649 | 1595 next = rn->waiting; |
| 1596 rn->waiting = NULL; | |
| 1597 | |
| 1598 ngx_queue_remove(&rn->queue); | |
| 1599 | |
| 1600 ngx_rbtree_delete(&r->name_rbtree, &rn->node); | |
| 1601 | |
| 1602 /* unlock name mutex */ | |
| 1603 | |
| 1604 while (next) { | |
|
5474
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
1605 ctx = next; |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
1606 ctx->state = code; |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
1607 next = ctx->next; |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
1608 |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
1609 ctx->handler(ctx); |
| 1649 | 1610 } |
| 1611 | |
|
5920
7420068c4d4b
Resolver: fixed use-after-free memory access.
Ruslan Ermilov <ru@nginx.com>
parents:
5820
diff
changeset
|
1612 ngx_resolver_free_node(r, rn); |
|
7420068c4d4b
Resolver: fixed use-after-free memory access.
Ruslan Ermilov <ru@nginx.com>
parents:
5820
diff
changeset
|
1613 |
| 1649 | 1614 return; |
| 1615 } | |
| 1616 | |
| 1617 i = ans; | |
| 1618 naddrs = 0; | |
| 1619 cname = NULL; | |
| 1620 | |
| 1621 for (a = 0; a < nan; a++) { | |
| 1622 | |
| 1623 start = i; | |
| 1624 | |
| 1625 while (i < last) { | |
| 1626 | |
| 1627 if (buf[i] & 0xc0) { | |
| 1628 i += 2; | |
| 1629 goto found; | |
| 1630 } | |
| 1631 | |
| 1632 if (buf[i] == 0) { | |
| 1633 i++; | |
| 1634 goto test_length; | |
| 1635 } | |
| 1636 | |
| 1637 i += 1 + buf[i]; | |
| 1638 } | |
| 1639 | |
| 1640 goto short_response; | |
| 1641 | |
| 1642 test_length: | |
| 1643 | |
| 1644 if (i - start < 2) { | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1645 err = "invalid name in DNS response"; |
| 1649 | 1646 goto invalid; |
| 1647 } | |
| 1648 | |
| 1649 found: | |
| 1650 | |
| 1651 if (i + sizeof(ngx_resolver_an_t) >= last) { | |
| 1652 goto short_response; | |
| 1653 } | |
| 1654 | |
| 1655 an = (ngx_resolver_an_t *) &buf[i]; | |
| 1656 | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1657 type = (an->type_hi << 8) + an->type_lo; |
|
5471
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1658 class = (an->class_hi << 8) + an->class_lo; |
| 1649 | 1659 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
|
1660 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
|
1661 + (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
|
1662 |
|
5471
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1663 if (class != 1) { |
|
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1664 ngx_log_error(r->log_level, r->log, 0, |
|
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1665 "unexpected RR class %ui", class); |
|
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1666 goto failed; |
|
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1667 } |
|
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1668 |
|
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1669 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
|
1670 ttl = 0; |
|
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1671 } |
| 1649 | 1672 |
|
5485
8958656a8060
Resolver: use minimum TTL for caching (ticket #329).
Ruslan Ermilov <ru@nginx.com>
parents:
5479
diff
changeset
|
1673 rn->ttl = ngx_min(rn->ttl, (uint32_t) ttl); |
|
8958656a8060
Resolver: use minimum TTL for caching (ticket #329).
Ruslan Ermilov <ru@nginx.com>
parents:
5479
diff
changeset
|
1674 |
|
5471
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1675 i += sizeof(ngx_resolver_an_t); |
|
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1676 |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1677 switch (type) { |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1678 |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1679 case NGX_RESOLVE_A: |
| 1649 | 1680 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1681 if (qtype != NGX_RESOLVE_A) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1682 err = "unexpected A record in DNS response"; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1683 goto invalid; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1684 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1685 |
|
5471
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1686 if (len != 4) { |
|
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1687 err = "invalid A record in DNS response"; |
|
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1688 goto invalid; |
|
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1689 } |
|
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1690 |
|
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1691 if (i + 4 > last) { |
| 1649 | 1692 goto short_response; |
| 1693 } | |
| 1694 | |
| 1695 naddrs++; | |
| 1696 | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1697 break; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1698 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1699 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1700 case NGX_RESOLVE_AAAA: |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1701 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1702 if (qtype != NGX_RESOLVE_AAAA) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1703 err = "unexpected AAAA record in DNS response"; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1704 goto invalid; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1705 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1706 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1707 if (len != 16) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1708 err = "invalid AAAA record in DNS response"; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1709 goto invalid; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1710 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1711 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1712 if (i + 16 > last) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1713 goto short_response; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1714 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1715 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1716 naddrs++; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1717 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1718 break; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1719 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1720 |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1721 case NGX_RESOLVE_CNAME: |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1722 |
|
5471
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1723 cname = &buf[i]; |
| 1965 | 1724 |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1725 break; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1726 |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1727 case NGX_RESOLVE_DNAME: |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1728 |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1729 break; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1730 |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1731 default: |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1732 |
| 1966 | 1733 ngx_log_error(r->log_level, r->log, 0, |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1734 "unexpected RR type %ui", type); |
| 1649 | 1735 } |
|
5471
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1736 |
|
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1737 i += len; |
| 1649 | 1738 } |
| 1739 | |
|
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
1740 ngx_log_debug3(NGX_LOG_DEBUG_CORE, r->log, 0, |
|
5485
8958656a8060
Resolver: use minimum TTL for caching (ticket #329).
Ruslan Ermilov <ru@nginx.com>
parents:
5479
diff
changeset
|
1741 "resolver naddrs:%ui cname:%p ttl:%uD", |
|
8958656a8060
Resolver: use minimum TTL for caching (ticket #329).
Ruslan Ermilov <ru@nginx.com>
parents:
5479
diff
changeset
|
1742 naddrs, cname, rn->ttl); |
| 1649 | 1743 |
| 1744 if (naddrs) { | |
| 1745 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1746 switch (qtype) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1747 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1748 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1749 case NGX_RESOLVE_AAAA: |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1750 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1751 if (naddrs == 1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1752 addr6 = &rn->u6.addr6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1753 rn->naddrs6 = 1; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1754 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1755 } else { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1756 addr6 = ngx_resolver_alloc(r, naddrs * sizeof(struct in6_addr)); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1757 if (addr6 == NULL) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1758 goto failed; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1759 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1760 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1761 rn->u6.addrs6 = addr6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1762 rn->naddrs6 = (u_short) naddrs; |
| 1649 | 1763 } |
| 1764 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1765 #if (NGX_SUPPRESS_WARN) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1766 addr = NULL; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1767 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1768 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1769 break; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1770 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1771 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1772 default: /* NGX_RESOLVE_A */ |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1773 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1774 if (naddrs == 1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1775 addr = &rn->u.addr; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1776 rn->naddrs = 1; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1777 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1778 } else { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1779 addr = ngx_resolver_alloc(r, naddrs * sizeof(in_addr_t)); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1780 if (addr == NULL) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1781 goto failed; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1782 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1783 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1784 rn->u.addrs = addr; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1785 rn->naddrs = (u_short) naddrs; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1786 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1787 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1788 #if (NGX_HAVE_INET6 && NGX_SUPPRESS_WARN) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1789 addr6 = NULL; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1790 #endif |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1791 } |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1792 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1793 n = 0; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1794 i = ans; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1795 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1796 for (a = 0; a < nan; a++) { |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1797 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1798 for ( ;; ) { |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1799 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1800 if (buf[i] & 0xc0) { |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1801 i += 2; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1802 break; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1803 } |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1804 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1805 if (buf[i] == 0) { |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1806 i++; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1807 break; |
| 1649 | 1808 } |
| 1809 | |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1810 i += 1 + buf[i]; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1811 } |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1812 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1813 an = (ngx_resolver_an_t *) &buf[i]; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1814 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1815 type = (an->type_hi << 8) + an->type_lo; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1816 len = (an->len_hi << 8) + an->len_lo; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1817 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1818 i += sizeof(ngx_resolver_an_t); |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1819 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1820 if (type == NGX_RESOLVE_A) { |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1821 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1822 addr[n] = htonl((buf[i] << 24) + (buf[i + 1] << 16) |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1823 + (buf[i + 2] << 8) + (buf[i + 3])); |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1824 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1825 if (++n == naddrs) { |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1826 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1827 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1828 if (rn->naddrs6 == (u_short) -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1829 goto next; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1830 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1831 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1832 |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1833 break; |
| 1649 | 1834 } |
| 1835 } | |
| 1836 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1837 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1838 else if (type == NGX_RESOLVE_AAAA) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1839 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1840 ngx_memcpy(addr6[n].s6_addr, &buf[i], 16); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1841 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1842 if (++n == naddrs) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1843 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1844 if (rn->naddrs == (u_short) -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1845 goto next; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1846 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1847 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1848 break; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1849 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1850 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1851 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1852 |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1853 i += len; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1854 } |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1855 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1856 |
|
5768
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1857 switch (qtype) { |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1858 |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1859 #if (NGX_HAVE_INET6) |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1860 case NGX_RESOLVE_AAAA: |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1861 |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1862 if (rn->naddrs6 == (u_short) -1) { |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1863 rn->naddrs6 = 0; |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1864 } |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1865 |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1866 break; |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1867 #endif |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1868 |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1869 default: /* NGX_RESOLVE_A */ |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1870 |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1871 if (rn->naddrs == (u_short) -1) { |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1872 rn->naddrs = 0; |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1873 } |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1874 } |
|
70a0408cca7b
Resolver: fixed resend on malformed responses.
Ruslan Ermilov <ru@nginx.com>
parents:
5764
diff
changeset
|
1875 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1876 if (rn->naddrs != (u_short) -1 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1877 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1878 && rn->naddrs6 != (u_short) -1 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1879 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1880 && rn->naddrs |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1881 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1882 + rn->naddrs6 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1883 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1884 > 0) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1885 { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1886 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1887 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1888 export: |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1889 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1890 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1891 naddrs = rn->naddrs; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1892 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1893 naddrs += rn->naddrs6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1894 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1895 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1896 if (naddrs == 1 && rn->naddrs == 1) { |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1897 addrs = NULL; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1898 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1899 } else { |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1900 addrs = ngx_resolver_export(r, rn, 0); |
| 1649 | 1901 if (addrs == NULL) { |
|
5471
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1902 goto failed; |
| 1649 | 1903 } |
| 1904 } | |
| 1905 | |
| 1906 ngx_queue_remove(&rn->queue); | |
| 1907 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1908 rn->valid = ngx_time() + (r->valid ? r->valid : (time_t) rn->ttl); |
| 1649 | 1909 rn->expire = ngx_time() + r->expire; |
| 1910 | |
| 1911 ngx_queue_insert_head(&r->name_expire_queue, &rn->queue); | |
| 1912 | |
| 1913 next = rn->waiting; | |
| 1914 rn->waiting = NULL; | |
| 1915 | |
| 1916 /* unlock name mutex */ | |
| 1917 | |
| 1918 while (next) { | |
|
5474
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
1919 ctx = next; |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
1920 ctx->state = NGX_OK; |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
1921 ctx->naddrs = naddrs; |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1922 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1923 if (addrs == NULL) { |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1924 ctx->addrs = &ctx->addr; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1925 ctx->addr.sockaddr = (struct sockaddr *) &ctx->sin; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1926 ctx->addr.socklen = sizeof(struct sockaddr_in); |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1927 ngx_memzero(&ctx->sin, sizeof(struct sockaddr_in)); |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1928 ctx->sin.sin_family = AF_INET; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1929 ctx->sin.sin_addr.s_addr = rn->u.addr; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1930 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1931 } else { |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1932 ctx->addrs = addrs; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1933 } |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1934 |
|
5474
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
1935 next = ctx->next; |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
1936 |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
1937 ctx->handler(ctx); |
| 1649 | 1938 } |
| 1939 | |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1940 if (addrs != NULL) { |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
1941 ngx_resolver_free(r, addrs->sockaddr); |
| 1649 | 1942 ngx_resolver_free(r, addrs); |
| 1943 } | |
| 1944 | |
|
4619
3171ec7d0d05
Resolver: protection from duplicate responses.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4610
diff
changeset
|
1945 ngx_resolver_free(r, rn->query); |
|
3171ec7d0d05
Resolver: protection from duplicate responses.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4610
diff
changeset
|
1946 rn->query = NULL; |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1947 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1948 rn->query6 = NULL; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1949 #endif |
|
4619
3171ec7d0d05
Resolver: protection from duplicate responses.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4610
diff
changeset
|
1950 |
| 1649 | 1951 return; |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1952 } |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1953 |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1954 if (cname) { |
| 1649 | 1955 |
| 1956 /* CNAME only */ | |
| 1957 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1958 if (rn->naddrs == (u_short) -1 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1959 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1960 || rn->naddrs6 == (u_short) -1 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1961 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1962 ) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1963 { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1964 goto next; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1965 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
1966 |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
1967 if (ngx_resolver_copy(r, &name, buf, cname, buf + last) != NGX_OK) { |
|
5471
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
1968 goto failed; |
| 1649 | 1969 } |
| 1970 | |
| 1971 ngx_log_debug1(NGX_LOG_DEBUG_CORE, r->log, 0, | |
| 1972 "resolver cname:\"%V\"", &name); | |
| 1973 | |
|
1741
0829024c924d
fix segfault if response will have CNAME only
Igor Sysoev <igor@sysoev.ru>
parents:
1689
diff
changeset
|
1974 ngx_queue_remove(&rn->queue); |
|
0829024c924d
fix segfault if response will have CNAME only
Igor Sysoev <igor@sysoev.ru>
parents:
1689
diff
changeset
|
1975 |
| 1649 | 1976 rn->cnlen = (u_short) name.len; |
| 1977 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
|
1978 |
|
5485
8958656a8060
Resolver: use minimum TTL for caching (ticket #329).
Ruslan Ermilov <ru@nginx.com>
parents:
5479
diff
changeset
|
1979 rn->valid = ngx_time() + (r->valid ? r->valid : (time_t) rn->ttl); |
| 1649 | 1980 rn->expire = ngx_time() + r->expire; |
| 1981 | |
| 1982 ngx_queue_insert_head(&r->name_expire_queue, &rn->queue); | |
| 1983 | |
|
6360
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
1984 ngx_resolver_free(r, rn->query); |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
1985 rn->query = NULL; |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
1986 #if (NGX_HAVE_INET6) |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
1987 rn->query6 = NULL; |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
1988 #endif |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
1989 |
| 1649 | 1990 ctx = rn->waiting; |
| 1991 rn->waiting = NULL; | |
| 1992 | |
| 1993 if (ctx) { | |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
1994 |
|
6360
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
1995 if (ctx->recursion++ >= NGX_RESOLVER_MAX_RECURSION) { |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
1996 |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
1997 /* unlock name mutex */ |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
1998 |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
1999 do { |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
2000 ctx->state = NGX_RESOLVE_NXDOMAIN; |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
2001 next = ctx->next; |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
2002 |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
2003 ctx->handler(ctx); |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
2004 |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
2005 ctx = next; |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
2006 } while (ctx); |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
2007 |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
2008 return; |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
2009 } |
|
93d70d87914c
Resolver: limited CNAME recursion.
Ruslan Ermilov <ru@nginx.com>
parents:
6359
diff
changeset
|
2010 |
|
6359
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
2011 for (next = ctx; next; next = next->next) { |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
2012 next->node = NULL; |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
2013 } |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
2014 |
|
dac6eda40475
Resolver: fixed use-after-free memory accesses with CNAME.
Roman Arutyunyan <arut@nginx.com>
parents:
6358
diff
changeset
|
2015 (void) ngx_resolve_name_locked(r, ctx, &name); |
| 1649 | 2016 } |
| 2017 | |
|
5471
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
2018 /* unlock name mutex */ |
|
9c96782d9d05
Resolver: fixes in A processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5470
diff
changeset
|
2019 |
| 1649 | 2020 return; |
| 2021 } | |
| 2022 | |
| 2023 ngx_log_error(r->log_level, r->log, 0, | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2024 "no A or CNAME types in DNS response"); |
| 1649 | 2025 return; |
| 2026 | |
| 2027 short_response: | |
| 2028 | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2029 err = "short DNS response"; |
| 1649 | 2030 |
| 2031 invalid: | |
| 2032 | |
| 2033 /* unlock name mutex */ | |
| 2034 | |
| 2035 ngx_log_error(r->log_level, r->log, 0, err); | |
| 2036 | |
| 2037 return; | |
| 2038 | |
| 2039 failed: | |
| 2040 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2041 next: |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2042 |
| 1649 | 2043 /* unlock name mutex */ |
| 2044 | |
| 2045 return; | |
| 2046 } | |
| 2047 | |
| 2048 | |
| 2049 static void | |
| 2050 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
|
2051 ngx_uint_t ident, ngx_uint_t code, ngx_uint_t nan) |
| 1649 | 2052 { |
| 2053 char *err; | |
| 2054 size_t len; | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2055 u_char text[NGX_SOCKADDR_STRLEN]; |
| 1649 | 2056 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
|
2057 int32_t ttl; |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2058 ngx_int_t octet; |
| 1649 | 2059 ngx_str_t name; |
|
5472
ab493c60d9ff
Resolver: fixes in PTR processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5471
diff
changeset
|
2060 ngx_uint_t i, mask, qident, class; |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2061 ngx_queue_t *expire_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2062 ngx_rbtree_t *tree; |
| 1649 | 2063 ngx_resolver_an_t *an; |
| 2064 ngx_resolver_ctx_t *ctx, *next; | |
| 2065 ngx_resolver_node_t *rn; | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2066 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2067 uint32_t hash; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2068 ngx_int_t digit; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2069 struct in6_addr addr6; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2070 #endif |
| 1649 | 2071 |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2072 if (ngx_resolver_copy(r, NULL, buf, |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2073 buf + sizeof(ngx_resolver_hdr_t), buf + n) |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2074 != NGX_OK) |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2075 { |
|
5472
ab493c60d9ff
Resolver: fixes in PTR processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5471
diff
changeset
|
2076 return; |
| 1649 | 2077 } |
| 2078 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2079 /* AF_INET */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2080 |
| 1649 | 2081 addr = 0; |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2082 i = sizeof(ngx_resolver_hdr_t); |
| 1649 | 2083 |
| 2084 for (mask = 0; mask < 32; mask += 8) { | |
| 2085 len = buf[i++]; | |
| 2086 | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2087 octet = ngx_atoi(&buf[i], len); |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2088 if (octet == NGX_ERROR || octet > 255) { |
| 1649 | 2089 goto invalid_in_addr_arpa; |
| 2090 } | |
| 2091 | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2092 addr += octet << mask; |
| 1649 | 2093 i += len; |
| 2094 } | |
| 2095 | |
|
5479
c0d6eae5a1c5
Resolver: lookups are case-insensitive.
Ruslan Ermilov <ru@nginx.com>
parents:
5478
diff
changeset
|
2096 if (ngx_strcasecmp(&buf[i], (u_char *) "\7in-addr\4arpa") == 0) { |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2097 i += sizeof("\7in-addr\4arpa"); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2098 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2099 /* lock addr mutex */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2100 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2101 rn = ngx_resolver_lookup_addr(r, addr); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2102 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2103 tree = &r->addr_rbtree; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2104 expire_queue = &r->addr_expire_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2105 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2106 addr = htonl(addr); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2107 name.len = ngx_inet_ntop(AF_INET, &addr, text, NGX_SOCKADDR_STRLEN); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2108 name.data = text; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2109 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2110 goto valid; |
| 1649 | 2111 } |
| 2112 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2113 invalid_in_addr_arpa: |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2114 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2115 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2116 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2117 i = sizeof(ngx_resolver_hdr_t); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2118 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2119 for (octet = 15; octet >= 0; octet--) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2120 if (buf[i++] != '\1') { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2121 goto invalid_ip6_arpa; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2122 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2123 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2124 digit = ngx_hextoi(&buf[i++], 1); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2125 if (digit == NGX_ERROR) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2126 goto invalid_ip6_arpa; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2127 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2128 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2129 addr6.s6_addr[octet] = (u_char) digit; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2130 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2131 if (buf[i++] != '\1') { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2132 goto invalid_ip6_arpa; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2133 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2134 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2135 digit = ngx_hextoi(&buf[i++], 1); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2136 if (digit == NGX_ERROR) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2137 goto invalid_ip6_arpa; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2138 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2139 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2140 addr6.s6_addr[octet] += (u_char) (digit * 16); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2141 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2142 |
|
5479
c0d6eae5a1c5
Resolver: lookups are case-insensitive.
Ruslan Ermilov <ru@nginx.com>
parents:
5478
diff
changeset
|
2143 if (ngx_strcasecmp(&buf[i], (u_char *) "\3ip6\4arpa") == 0) { |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2144 i += sizeof("\3ip6\4arpa"); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2145 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2146 /* lock addr mutex */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2147 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2148 hash = ngx_crc32_short(addr6.s6_addr, 16); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2149 rn = ngx_resolver_lookup_addr6(r, &addr6, hash); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2150 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2151 tree = &r->addr6_rbtree; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2152 expire_queue = &r->addr6_expire_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2153 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2154 name.len = ngx_inet6_ntop(addr6.s6_addr, text, NGX_SOCKADDR_STRLEN); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2155 name.data = text; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2156 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2157 goto valid; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2158 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2159 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2160 invalid_ip6_arpa: |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2161 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2162 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2163 ngx_log_error(r->log_level, r->log, 0, |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2164 "invalid in-addr.arpa or ip6.arpa name in DNS response"); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2165 return; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2166 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2167 valid: |
| 1649 | 2168 |
| 2169 if (rn == NULL || rn->query == NULL) { | |
| 2170 ngx_log_error(r->log_level, r->log, 0, | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2171 "unexpected response for %V", &name); |
| 1649 | 2172 goto failed; |
| 2173 } | |
| 2174 | |
| 2175 qident = (rn->query[0] << 8) + rn->query[1]; | |
| 2176 | |
| 2177 if (ident != qident) { | |
| 2178 ngx_log_error(r->log_level, r->log, 0, | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2179 "wrong ident %ui response for %V, expect %ui", |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2180 ident, &name, qident); |
| 1649 | 2181 goto failed; |
| 2182 } | |
| 2183 | |
|
1742
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
2184 if (code == 0 && nan == 0) { |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2185 code = NGX_RESOLVE_NXDOMAIN; |
|
1742
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
2186 } |
|
268b81386fe4
no answers in DNS response should be NXDOMAIN
Igor Sysoev <igor@sysoev.ru>
parents:
1741
diff
changeset
|
2187 |
| 1649 | 2188 if (code) { |
| 2189 next = rn->waiting; | |
| 2190 rn->waiting = NULL; | |
| 2191 | |
| 2192 ngx_queue_remove(&rn->queue); | |
| 2193 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2194 ngx_rbtree_delete(tree, &rn->node); |
| 1649 | 2195 |
| 2196 /* unlock addr mutex */ | |
| 2197 | |
| 2198 while (next) { | |
|
5474
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
2199 ctx = next; |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
2200 ctx->state = code; |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
2201 next = ctx->next; |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
2202 |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
2203 ctx->handler(ctx); |
| 1649 | 2204 } |
| 2205 | |
|
5920
7420068c4d4b
Resolver: fixed use-after-free memory access.
Ruslan Ermilov <ru@nginx.com>
parents:
5820
diff
changeset
|
2206 ngx_resolver_free_node(r, rn); |
|
7420068c4d4b
Resolver: fixed use-after-free memory access.
Ruslan Ermilov <ru@nginx.com>
parents:
5820
diff
changeset
|
2207 |
| 1649 | 2208 return; |
| 2209 } | |
| 2210 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2211 i += sizeof(ngx_resolver_qs_t); |
| 1649 | 2212 |
|
5472
ab493c60d9ff
Resolver: fixes in PTR processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5471
diff
changeset
|
2213 if (i + 2 + sizeof(ngx_resolver_an_t) >= n) { |
| 1649 | 2214 goto short_response; |
| 2215 } | |
| 2216 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2217 /* compression pointer to *.arpa */ |
| 1649 | 2218 |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2219 if (buf[i] != 0xc0 || buf[i + 1] != sizeof(ngx_resolver_hdr_t)) { |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2220 err = "invalid in-addr.arpa or ip6.arpa name in DNS response"; |
| 1649 | 2221 goto invalid; |
| 2222 } | |
| 2223 | |
| 2224 an = (ngx_resolver_an_t *) &buf[i + 2]; | |
| 2225 | |
|
5472
ab493c60d9ff
Resolver: fixes in PTR processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5471
diff
changeset
|
2226 class = (an->class_hi << 8) + an->class_lo; |
| 1649 | 2227 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
|
2228 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
|
2229 + (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
|
2230 |
|
5472
ab493c60d9ff
Resolver: fixes in PTR processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5471
diff
changeset
|
2231 if (class != 1) { |
|
ab493c60d9ff
Resolver: fixes in PTR processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5471
diff
changeset
|
2232 ngx_log_error(r->log_level, r->log, 0, |
|
ab493c60d9ff
Resolver: fixes in PTR processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5471
diff
changeset
|
2233 "unexpected RR class %ui", class); |
|
ab493c60d9ff
Resolver: fixes in PTR processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5471
diff
changeset
|
2234 goto failed; |
|
ab493c60d9ff
Resolver: fixes in PTR processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5471
diff
changeset
|
2235 } |
|
ab493c60d9ff
Resolver: fixes in PTR processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5471
diff
changeset
|
2236 |
|
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
2237 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
|
2238 ttl = 0; |
|
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
2239 } |
| 1649 | 2240 |
| 2241 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
|
2242 "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
|
2243 (an->type_hi << 8) + an->type_lo, |
|
5472
ab493c60d9ff
Resolver: fixes in PTR processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5471
diff
changeset
|
2244 class, len); |
| 1649 | 2245 |
| 2246 i += 2 + sizeof(ngx_resolver_an_t); | |
| 2247 | |
|
5469
b2fc466a11a7
Resolver: removed unnecessary casts.
Ruslan Ermilov <ru@nginx.com>
parents:
5468
diff
changeset
|
2248 if (i + len > n) { |
| 1649 | 2249 goto short_response; |
| 2250 } | |
| 2251 | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2252 if (ngx_resolver_copy(r, &name, buf, buf + i, buf + n) != NGX_OK) { |
|
5472
ab493c60d9ff
Resolver: fixes in PTR processing.
Ruslan Ermilov <ru@nginx.com>
parents:
5471
diff
changeset
|
2253 goto failed; |
| 1649 | 2254 } |
| 2255 | |
| 2256 ngx_log_debug1(NGX_LOG_DEBUG_CORE, r->log, 0, "resolver an:%V", &name); | |
| 2257 | |
|
2486
8de5dc3e7001
use length of uncompressed name
Igor Sysoev <igor@sysoev.ru>
parents:
2484
diff
changeset
|
2258 if (name.len != (size_t) rn->nlen |
|
8de5dc3e7001
use length of uncompressed name
Igor Sysoev <igor@sysoev.ru>
parents:
2484
diff
changeset
|
2259 || ngx_strncmp(name.data, rn->name, name.len) != 0) |
| 1649 | 2260 { |
|
2482
30ec8c5ac75b
fix reverse resolving cache: it stored zero length names
Igor Sysoev <igor@sysoev.ru>
parents:
2314
diff
changeset
|
2261 if (rn->nlen) { |
|
30ec8c5ac75b
fix reverse resolving cache: it stored zero length names
Igor Sysoev <igor@sysoev.ru>
parents:
2314
diff
changeset
|
2262 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
|
2263 } |
|
30ec8c5ac75b
fix reverse resolving cache: it stored zero length names
Igor Sysoev <igor@sysoev.ru>
parents:
2314
diff
changeset
|
2264 |
|
2490
1c87647b7ca5
fix building by msvc, introduced in r2487
Igor Sysoev <igor@sysoev.ru>
parents:
2487
diff
changeset
|
2265 rn->nlen = (u_short) name.len; |
| 1649 | 2266 rn->name = name.data; |
| 2267 | |
|
2486
8de5dc3e7001
use length of uncompressed name
Igor Sysoev <igor@sysoev.ru>
parents:
2484
diff
changeset
|
2268 name.data = ngx_resolver_dup(r, rn->name, name.len); |
| 1649 | 2269 if (name.data == NULL) { |
| 2270 goto failed; | |
| 2271 } | |
| 2272 } | |
| 2273 | |
| 2274 ngx_queue_remove(&rn->queue); | |
| 2275 | |
|
4295
05031fce7ce8
Now nginx uses TTL of a DNS response when calculating cache validity.
Ruslan Ermilov <ru@nginx.com>
parents:
4267
diff
changeset
|
2276 rn->valid = ngx_time() + (r->valid ? r->valid : ttl); |
| 1649 | 2277 rn->expire = ngx_time() + r->expire; |
| 2278 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2279 ngx_queue_insert_head(expire_queue, &rn->queue); |
| 1649 | 2280 |
| 2281 next = rn->waiting; | |
| 2282 rn->waiting = NULL; | |
| 2283 | |
| 2284 /* unlock addr mutex */ | |
| 2285 | |
| 2286 while (next) { | |
|
5474
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
2287 ctx = next; |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
2288 ctx->state = NGX_OK; |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
2289 ctx->name = name; |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
2290 next = ctx->next; |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
2291 |
|
b43b02bb54db
Resolver: fixed indentation.
Ruslan Ermilov <ru@nginx.com>
parents:
5472
diff
changeset
|
2292 ctx->handler(ctx); |
| 1649 | 2293 } |
| 2294 | |
| 2295 ngx_resolver_free(r, name.data); | |
| 2296 | |
| 2297 return; | |
| 2298 | |
| 2299 short_response: | |
| 2300 | |
| 2301 err = "short DNS response"; | |
| 2302 | |
| 2303 invalid: | |
| 2304 | |
| 2305 /* unlock addr mutex */ | |
| 2306 | |
| 2307 ngx_log_error(r->log_level, r->log, 0, err); | |
| 2308 | |
| 2309 return; | |
| 2310 | |
| 2311 failed: | |
| 2312 | |
| 2313 /* unlock addr mutex */ | |
| 2314 | |
| 2315 return; | |
| 2316 } | |
| 2317 | |
| 2318 | |
| 2319 static ngx_resolver_node_t * | |
| 2320 ngx_resolver_lookup_name(ngx_resolver_t *r, ngx_str_t *name, uint32_t hash) | |
| 2321 { | |
| 2322 ngx_int_t rc; | |
| 2323 ngx_rbtree_node_t *node, *sentinel; | |
| 2324 ngx_resolver_node_t *rn; | |
| 2325 | |
| 2326 node = r->name_rbtree.root; | |
| 2327 sentinel = r->name_rbtree.sentinel; | |
| 2328 | |
| 2329 while (node != sentinel) { | |
| 2330 | |
| 2331 if (hash < node->key) { | |
| 2332 node = node->left; | |
| 2333 continue; | |
| 2334 } | |
| 2335 | |
| 2336 if (hash > node->key) { | |
| 2337 node = node->right; | |
| 2338 continue; | |
| 2339 } | |
| 2340 | |
| 2341 /* hash == node->key */ | |
| 2342 | |
|
5921
5004210e8c78
Resolver: fixed debug event logging.
Ruslan Ermilov <ru@nginx.com>
parents:
5920
diff
changeset
|
2343 rn = ngx_resolver_node(node); |
|
4497
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4496
diff
changeset
|
2344 |
|
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4496
diff
changeset
|
2345 rc = ngx_memn2cmp(name->data, rn->name, name->len, rn->nlen); |
|
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4496
diff
changeset
|
2346 |
|
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4496
diff
changeset
|
2347 if (rc == 0) { |
|
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4496
diff
changeset
|
2348 return rn; |
|
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4496
diff
changeset
|
2349 } |
|
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4496
diff
changeset
|
2350 |
|
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4496
diff
changeset
|
2351 node = (rc < 0) ? node->left : node->right; |
| 1649 | 2352 } |
| 2353 | |
| 2354 /* not found */ | |
| 2355 | |
| 2356 return NULL; | |
| 2357 } | |
| 2358 | |
| 2359 | |
| 2360 static ngx_resolver_node_t * | |
| 2361 ngx_resolver_lookup_addr(ngx_resolver_t *r, in_addr_t addr) | |
| 2362 { | |
| 2363 ngx_rbtree_node_t *node, *sentinel; | |
| 2364 | |
| 2365 node = r->addr_rbtree.root; | |
| 2366 sentinel = r->addr_rbtree.sentinel; | |
| 2367 | |
| 2368 while (node != sentinel) { | |
| 2369 | |
| 2370 if (addr < node->key) { | |
| 2371 node = node->left; | |
| 2372 continue; | |
| 2373 } | |
| 2374 | |
| 2375 if (addr > node->key) { | |
| 2376 node = node->right; | |
| 2377 continue; | |
| 2378 } | |
| 2379 | |
| 2380 /* addr == node->key */ | |
| 2381 | |
|
5921
5004210e8c78
Resolver: fixed debug event logging.
Ruslan Ermilov <ru@nginx.com>
parents:
5920
diff
changeset
|
2382 return ngx_resolver_node(node); |
| 1649 | 2383 } |
| 2384 | |
| 2385 /* not found */ | |
| 2386 | |
| 2387 return NULL; | |
| 2388 } | |
| 2389 | |
| 2390 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2391 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2392 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2393 static ngx_resolver_node_t * |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2394 ngx_resolver_lookup_addr6(ngx_resolver_t *r, struct in6_addr *addr, |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2395 uint32_t hash) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2396 { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2397 ngx_int_t rc; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2398 ngx_rbtree_node_t *node, *sentinel; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2399 ngx_resolver_node_t *rn; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2400 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2401 node = r->addr6_rbtree.root; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2402 sentinel = r->addr6_rbtree.sentinel; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2403 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2404 while (node != sentinel) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2405 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2406 if (hash < node->key) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2407 node = node->left; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2408 continue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2409 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2410 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2411 if (hash > node->key) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2412 node = node->right; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2413 continue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2414 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2415 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2416 /* hash == node->key */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2417 |
|
5921
5004210e8c78
Resolver: fixed debug event logging.
Ruslan Ermilov <ru@nginx.com>
parents:
5920
diff
changeset
|
2418 rn = ngx_resolver_node(node); |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2419 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2420 rc = ngx_memcmp(addr, &rn->addr6, 16); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2421 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2422 if (rc == 0) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2423 return rn; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2424 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2425 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2426 node = (rc < 0) ? node->left : node->right; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2427 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2428 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2429 /* not found */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2430 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2431 return NULL; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2432 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2433 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2434 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2435 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2436 |
| 1649 | 2437 static void |
| 2438 ngx_resolver_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
| 2439 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) | |
| 2440 { | |
| 2441 ngx_rbtree_node_t **p; | |
| 2442 ngx_resolver_node_t *rn, *rn_temp; | |
| 2443 | |
| 2444 for ( ;; ) { | |
| 2445 | |
| 2446 if (node->key < temp->key) { | |
| 2447 | |
| 2448 p = &temp->left; | |
| 2449 | |
| 2450 } else if (node->key > temp->key) { | |
| 2451 | |
| 2452 p = &temp->right; | |
| 2453 | |
| 2454 } else { /* node->key == temp->key */ | |
| 2455 | |
|
5921
5004210e8c78
Resolver: fixed debug event logging.
Ruslan Ermilov <ru@nginx.com>
parents:
5920
diff
changeset
|
2456 rn = ngx_resolver_node(node); |
|
5004210e8c78
Resolver: fixed debug event logging.
Ruslan Ermilov <ru@nginx.com>
parents:
5920
diff
changeset
|
2457 rn_temp = ngx_resolver_node(temp); |
| 1649 | 2458 |
|
3143
ab6258e18099
fix resolver cache rbtree comparison
Igor Sysoev <igor@sysoev.ru>
parents:
3139
diff
changeset
|
2459 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
|
2460 < 0) ? &temp->left : &temp->right; |
| 1649 | 2461 } |
| 2462 | |
| 2463 if (*p == sentinel) { | |
| 2464 break; | |
| 2465 } | |
| 2466 | |
| 2467 temp = *p; | |
| 2468 } | |
| 2469 | |
| 2470 *p = node; | |
| 2471 node->parent = temp; | |
| 2472 node->left = sentinel; | |
| 2473 node->right = sentinel; | |
| 2474 ngx_rbt_red(node); | |
| 2475 } | |
| 2476 | |
| 2477 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2478 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2479 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2480 static void |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2481 ngx_resolver_rbtree_insert_addr6_value(ngx_rbtree_node_t *temp, |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2482 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2483 { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2484 ngx_rbtree_node_t **p; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2485 ngx_resolver_node_t *rn, *rn_temp; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2486 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2487 for ( ;; ) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2488 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2489 if (node->key < temp->key) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2490 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2491 p = &temp->left; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2492 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2493 } else if (node->key > temp->key) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2494 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2495 p = &temp->right; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2496 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2497 } else { /* node->key == temp->key */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2498 |
|
5921
5004210e8c78
Resolver: fixed debug event logging.
Ruslan Ermilov <ru@nginx.com>
parents:
5920
diff
changeset
|
2499 rn = ngx_resolver_node(node); |
|
5004210e8c78
Resolver: fixed debug event logging.
Ruslan Ermilov <ru@nginx.com>
parents:
5920
diff
changeset
|
2500 rn_temp = ngx_resolver_node(temp); |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2501 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2502 p = (ngx_memcmp(&rn->addr6, &rn_temp->addr6, 16) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2503 < 0) ? &temp->left : &temp->right; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2504 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2505 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2506 if (*p == sentinel) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2507 break; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2508 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2509 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2510 temp = *p; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2511 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2512 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2513 *p = node; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2514 node->parent = temp; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2515 node->left = sentinel; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2516 node->right = sentinel; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2517 ngx_rbt_red(node); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2518 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2519 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2520 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2521 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2522 |
| 1649 | 2523 static ngx_int_t |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2524 ngx_resolver_create_name_query(ngx_resolver_t *r, ngx_resolver_node_t *rn, |
|
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2525 ngx_str_t *name) |
| 1649 | 2526 { |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2527 u_char *p, *s; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2528 size_t len, nlen; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2529 ngx_uint_t ident; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2530 ngx_resolver_qs_t *qs; |
|
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2531 ngx_resolver_hdr_t *query; |
| 1649 | 2532 |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2533 nlen = name->len ? (1 + name->len + 1) : 1; |
|
3306
61bdaac6c668
fix resolving an empty name (".")
Igor Sysoev <igor@sysoev.ru>
parents:
3299
diff
changeset
|
2534 |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2535 len = sizeof(ngx_resolver_hdr_t) + nlen + sizeof(ngx_resolver_qs_t); |
| 1649 | 2536 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2537 #if (NGX_HAVE_INET6) |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2538 p = ngx_resolver_alloc(r, r->ipv6 ? len * 2 : len); |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2539 #else |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2540 p = ngx_resolver_alloc(r, len); |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2541 #endif |
| 1649 | 2542 if (p == NULL) { |
| 2543 return NGX_ERROR; | |
| 2544 } | |
| 2545 | |
| 2546 rn->qlen = (u_short) len; | |
| 2547 rn->query = p; | |
| 2548 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2549 #if (NGX_HAVE_INET6) |
|
5478
3cb3175a6fef
The "ipv6=" boolean parameter of the "resolver" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
5477
diff
changeset
|
2550 if (r->ipv6) { |
|
3cb3175a6fef
The "ipv6=" boolean parameter of the "resolver" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
5477
diff
changeset
|
2551 rn->query6 = p + len; |
|
3cb3175a6fef
The "ipv6=" boolean parameter of the "resolver" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
5477
diff
changeset
|
2552 } |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2553 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2554 |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2555 query = (ngx_resolver_hdr_t *) p; |
| 1649 | 2556 |
| 2557 ident = ngx_random(); | |
| 2558 | |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2559 ngx_log_debug2(NGX_LOG_DEBUG_CORE, r->log, 0, |
|
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2560 "resolve: \"%V\" A %i", name, ident & 0xffff); |
| 1649 | 2561 |
| 2562 query->ident_hi = (u_char) ((ident >> 8) & 0xff); | |
| 2563 query->ident_lo = (u_char) (ident & 0xff); | |
| 2564 | |
| 2565 /* recursion query */ | |
| 2566 query->flags_hi = 1; query->flags_lo = 0; | |
| 2567 | |
| 2568 /* one question */ | |
| 2569 query->nqs_hi = 0; query->nqs_lo = 1; | |
| 2570 query->nan_hi = 0; query->nan_lo = 0; | |
| 2571 query->nns_hi = 0; query->nns_lo = 0; | |
| 2572 query->nar_hi = 0; query->nar_lo = 0; | |
| 2573 | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2574 p += sizeof(ngx_resolver_hdr_t) + nlen; |
| 1649 | 2575 |
| 2576 qs = (ngx_resolver_qs_t *) p; | |
| 2577 | |
| 2578 /* query type */ | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2579 qs->type_hi = 0; qs->type_lo = NGX_RESOLVE_A; |
| 1649 | 2580 |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2581 /* IN query class */ |
| 1649 | 2582 qs->class_hi = 0; qs->class_lo = 1; |
| 2583 | |
| 2584 /* convert "www.example.com" to "\3www\7example\3com\0" */ | |
| 2585 | |
| 2586 len = 0; | |
| 2587 p--; | |
| 2588 *p-- = '\0'; | |
| 2589 | |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2590 if (name->len == 0) { |
|
4610
778d2cc03e22
Fixed segmentation fault in ngx_resolver_create_name_query().
Ruslan Ermilov <ru@nginx.com>
parents:
4556
diff
changeset
|
2591 return NGX_DECLINED; |
|
778d2cc03e22
Fixed segmentation fault in ngx_resolver_create_name_query().
Ruslan Ermilov <ru@nginx.com>
parents:
4556
diff
changeset
|
2592 } |
|
778d2cc03e22
Fixed segmentation fault in ngx_resolver_create_name_query().
Ruslan Ermilov <ru@nginx.com>
parents:
4556
diff
changeset
|
2593 |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2594 for (s = name->data + name->len - 1; s >= name->data; s--) { |
| 1649 | 2595 if (*s != '.') { |
| 2596 *p = *s; | |
| 2597 len++; | |
| 2598 | |
| 2599 } else { | |
|
4556
1bddc91e78d6
Resolver: added missing sanity checking when creating name queries.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4497
diff
changeset
|
2600 if (len == 0 || len > 255) { |
|
1961
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
2601 return NGX_DECLINED; |
|
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
2602 } |
|
99b9feacccb4
return NXDOMAIN for ".." in host name
Igor Sysoev <igor@sysoev.ru>
parents:
1960
diff
changeset
|
2603 |
| 1649 | 2604 *p = (u_char) len; |
| 2605 len = 0; | |
| 2606 } | |
| 2607 | |
| 2608 p--; | |
| 2609 } | |
| 2610 | |
|
4556
1bddc91e78d6
Resolver: added missing sanity checking when creating name queries.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4497
diff
changeset
|
2611 if (len == 0 || len > 255) { |
|
1bddc91e78d6
Resolver: added missing sanity checking when creating name queries.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4497
diff
changeset
|
2612 return NGX_DECLINED; |
|
1bddc91e78d6
Resolver: added missing sanity checking when creating name queries.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4497
diff
changeset
|
2613 } |
|
1bddc91e78d6
Resolver: added missing sanity checking when creating name queries.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4497
diff
changeset
|
2614 |
| 1649 | 2615 *p = (u_char) len; |
| 2616 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2617 #if (NGX_HAVE_INET6) |
|
5478
3cb3175a6fef
The "ipv6=" boolean parameter of the "resolver" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
5477
diff
changeset
|
2618 if (!r->ipv6) { |
|
3cb3175a6fef
The "ipv6=" boolean parameter of the "resolver" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
5477
diff
changeset
|
2619 return NGX_OK; |
|
3cb3175a6fef
The "ipv6=" boolean parameter of the "resolver" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
5477
diff
changeset
|
2620 } |
|
3cb3175a6fef
The "ipv6=" boolean parameter of the "resolver" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
5477
diff
changeset
|
2621 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2622 p = rn->query6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2623 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2624 ngx_memcpy(p, rn->query, rn->qlen); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2625 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2626 query = (ngx_resolver_hdr_t *) p; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2627 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2628 ident = ngx_random(); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2629 |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2630 ngx_log_debug2(NGX_LOG_DEBUG_CORE, r->log, 0, |
|
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2631 "resolve: \"%V\" AAAA %i", name, ident & 0xffff); |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2632 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2633 query->ident_hi = (u_char) ((ident >> 8) & 0xff); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2634 query->ident_lo = (u_char) (ident & 0xff); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2635 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2636 p += sizeof(ngx_resolver_hdr_t) + nlen; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2637 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2638 qs = (ngx_resolver_qs_t *) p; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2639 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2640 qs->type_lo = NGX_RESOLVE_AAAA; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2641 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2642 |
| 1649 | 2643 return NGX_OK; |
| 2644 } | |
| 2645 | |
| 2646 | |
| 2647 static ngx_int_t | |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2648 ngx_resolver_create_addr_query(ngx_resolver_t *r, ngx_resolver_node_t *rn, |
|
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2649 ngx_addr_t *addr) |
| 1649 | 2650 { |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2651 u_char *p, *d; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2652 size_t len; |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2653 in_addr_t inaddr; |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2654 ngx_int_t n; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2655 ngx_uint_t ident; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2656 ngx_resolver_hdr_t *query; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2657 struct sockaddr_in *sin; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2658 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2659 struct sockaddr_in6 *sin6; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2660 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2661 |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2662 switch (addr->sockaddr->sa_family) { |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2663 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2664 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2665 case AF_INET6: |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2666 len = sizeof(ngx_resolver_hdr_t) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2667 + 64 + sizeof(".ip6.arpa.") - 1 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2668 + sizeof(ngx_resolver_qs_t); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2669 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2670 break; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2671 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2672 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2673 default: /* AF_INET */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2674 len = sizeof(ngx_resolver_hdr_t) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2675 + sizeof(".255.255.255.255.in-addr.arpa.") - 1 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2676 + sizeof(ngx_resolver_qs_t); |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
2677 } |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2678 |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2679 p = ngx_resolver_alloc(r, len); |
| 1649 | 2680 if (p == NULL) { |
| 2681 return NGX_ERROR; | |
| 2682 } | |
| 2683 | |
| 2684 rn->query = p; | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2685 query = (ngx_resolver_hdr_t *) p; |
| 1649 | 2686 |
| 2687 ident = ngx_random(); | |
| 2688 | |
| 2689 query->ident_hi = (u_char) ((ident >> 8) & 0xff); | |
| 2690 query->ident_lo = (u_char) (ident & 0xff); | |
| 2691 | |
| 2692 /* recursion query */ | |
| 2693 query->flags_hi = 1; query->flags_lo = 0; | |
| 2694 | |
| 2695 /* one question */ | |
| 2696 query->nqs_hi = 0; query->nqs_lo = 1; | |
| 2697 query->nan_hi = 0; query->nan_lo = 0; | |
| 2698 query->nns_hi = 0; query->nns_lo = 0; | |
| 2699 query->nar_hi = 0; query->nar_lo = 0; | |
| 2700 | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2701 p += sizeof(ngx_resolver_hdr_t); |
| 1649 | 2702 |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2703 switch (addr->sockaddr->sa_family) { |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2704 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2705 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2706 case AF_INET6: |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2707 sin6 = (struct sockaddr_in6 *) addr->sockaddr; |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2708 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2709 for (n = 15; n >= 0; n--) { |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2710 p = ngx_sprintf(p, "\1%xd\1%xd", |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2711 sin6->sin6_addr.s6_addr[n] & 0xf, |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2712 (sin6->sin6_addr.s6_addr[n] >> 4) & 0xf); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2713 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2714 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2715 p = ngx_cpymem(p, "\3ip6\4arpa\0", 10); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2716 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2717 break; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2718 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2719 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2720 default: /* AF_INET */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2721 |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2722 sin = (struct sockaddr_in *) addr->sockaddr; |
|
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2723 inaddr = ntohl(sin->sin_addr.s_addr); |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2724 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2725 for (n = 0; n < 32; n += 8) { |
|
6358
5557bf31e25d
Resolver: changed the ngx_resolver_create_*_query() arguments.
Roman Arutyunyan <arut@nginx.com>
parents:
6357
diff
changeset
|
2726 d = ngx_sprintf(&p[1], "%ud", (inaddr >> n) & 0xff); |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2727 *p = (u_char) (d - &p[1]); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2728 p = d; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2729 } |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2730 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2731 p = ngx_cpymem(p, "\7in-addr\4arpa\0", 14); |
| 1649 | 2732 } |
| 2733 | |
|
5468
5c410d6ca7dd
Resolver: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
5360
diff
changeset
|
2734 /* query type "PTR", IN query class */ |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2735 p = ngx_cpymem(p, "\0\14\0\1", 4); |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2736 |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
2737 rn->qlen = (u_short) (p - rn->query); |
| 1649 | 2738 |
| 2739 return NGX_OK; | |
| 2740 } | |
| 2741 | |
| 2742 | |
| 2743 static ngx_int_t | |
| 2744 ngx_resolver_copy(ngx_resolver_t *r, ngx_str_t *name, u_char *buf, u_char *src, | |
| 2745 u_char *last) | |
| 2746 { | |
| 2747 char *err; | |
| 2748 u_char *p, *dst; | |
| 2749 ssize_t len; | |
| 2750 ngx_uint_t i, n; | |
| 2751 | |
| 2752 p = src; | |
| 2753 len = -1; | |
| 2754 | |
| 2755 /* | |
| 2756 * compression pointers allow to create endless loop, so we set limit; | |
| 2757 * 128 pointers should be enough to store 255-byte name | |
| 2758 */ | |
| 2759 | |
| 2760 for (i = 0; i < 128; i++) { | |
| 2761 n = *p++; | |
| 2762 | |
| 2763 if (n == 0) { | |
| 2764 goto done; | |
| 2765 } | |
| 2766 | |
| 2767 if (n & 0xc0) { | |
|
2314
52987a023486
fix compression pointer for big (>255) DNS responses
Igor Sysoev <igor@sysoev.ru>
parents:
2282
diff
changeset
|
2768 n = ((n & 0x3f) << 8) + *p; |
| 1649 | 2769 p = &buf[n]; |
| 2770 | |
| 2771 } else { | |
| 2772 len += 1 + n; | |
| 2773 p = &p[n]; | |
| 2774 } | |
| 2775 | |
| 2776 if (p >= last) { | |
| 2777 err = "name is out of response"; | |
| 2778 goto invalid; | |
| 2779 } | |
| 2780 } | |
| 2781 | |
| 2782 err = "compression pointers loop"; | |
| 2783 | |
| 2784 invalid: | |
| 2785 | |
| 2786 ngx_log_error(r->log_level, r->log, 0, err); | |
| 2787 | |
| 2788 return NGX_ERROR; | |
| 2789 | |
| 2790 done: | |
| 2791 | |
| 2792 if (name == NULL) { | |
| 583 | 2793 return NGX_OK; |
| 2794 } | |
| 2795 | |
|
3298
847ab5a32307
fix "PTR ." case in address resolver
Igor Sysoev <igor@sysoev.ru>
parents:
3297
diff
changeset
|
2796 if (len == -1) { |
|
5764
f166c521b619
Style: use ngx_str_null().
Tatsuhiko Kubo <cubicdaiya@gmail.com>
parents:
5600
diff
changeset
|
2797 ngx_str_null(name); |
|
3298
847ab5a32307
fix "PTR ." case in address resolver
Igor Sysoev <igor@sysoev.ru>
parents:
3297
diff
changeset
|
2798 return NGX_OK; |
|
847ab5a32307
fix "PTR ." case in address resolver
Igor Sysoev <igor@sysoev.ru>
parents:
3297
diff
changeset
|
2799 } |
|
847ab5a32307
fix "PTR ." case in address resolver
Igor Sysoev <igor@sysoev.ru>
parents:
3297
diff
changeset
|
2800 |
| 1649 | 2801 dst = ngx_resolver_alloc(r, len); |
| 2802 if (dst == NULL) { | |
| 2803 return NGX_ERROR; | |
| 2804 } | |
| 2805 | |
| 2806 name->data = dst; | |
| 2807 | |
| 2808 n = *src++; | |
| 2809 | |
| 2810 for ( ;; ) { | |
|
4267
768212ca0745
Fixed compression pointer processing in DNS response greater than 255 bytes.
Igor Sysoev <igor@sysoev.ru>
parents:
4225
diff
changeset
|
2811 if (n & 0xc0) { |
|
768212ca0745
Fixed compression pointer processing in DNS response greater than 255 bytes.
Igor Sysoev <igor@sysoev.ru>
parents:
4225
diff
changeset
|
2812 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
|
2813 src = &buf[n]; |
|
768212ca0745
Fixed compression pointer processing in DNS response greater than 255 bytes.
Igor Sysoev <igor@sysoev.ru>
parents:
4225
diff
changeset
|
2814 |
|
768212ca0745
Fixed compression pointer processing in DNS response greater than 255 bytes.
Igor Sysoev <igor@sysoev.ru>
parents:
4225
diff
changeset
|
2815 n = *src++; |
|
768212ca0745
Fixed compression pointer processing in DNS response greater than 255 bytes.
Igor Sysoev <igor@sysoev.ru>
parents:
4225
diff
changeset
|
2816 |
|
768212ca0745
Fixed compression pointer processing in DNS response greater than 255 bytes.
Igor Sysoev <igor@sysoev.ru>
parents:
4225
diff
changeset
|
2817 } else { |
|
5479
c0d6eae5a1c5
Resolver: lookups are case-insensitive.
Ruslan Ermilov <ru@nginx.com>
parents:
5478
diff
changeset
|
2818 ngx_strlow(dst, src, n); |
| 1649 | 2819 dst += n; |
| 2820 src += n; | |
| 2821 | |
| 2822 n = *src++; | |
| 2823 | |
| 2824 if (n != 0) { | |
| 2825 *dst++ = '.'; | |
| 2826 } | |
| 2827 } | |
| 2828 | |
| 2829 if (n == 0) { | |
| 2830 name->len = dst - name->data; | |
| 2831 return NGX_OK; | |
| 2832 } | |
| 2833 } | |
| 2834 } | |
| 2835 | |
| 2836 | |
| 2837 static void | |
| 2838 ngx_resolver_timeout_handler(ngx_event_t *ev) | |
| 2839 { | |
|
6356
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
2840 ngx_resolver_ctx_t *ctx; |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
2841 |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
2842 ctx = ev->data; |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
2843 |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
2844 ctx->state = NGX_RESOLVE_TIMEDOUT; |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
2845 |
|
f63dd04c1580
Resolver: fixed crashes in timeout handler.
Ruslan Ermilov <ru@nginx.com>
parents:
6355
diff
changeset
|
2846 ctx->handler(ctx); |
| 1649 | 2847 } |
| 2848 | |
| 2849 | |
| 2850 static void | |
| 2851 ngx_resolver_free_node(ngx_resolver_t *r, ngx_resolver_node_t *rn) | |
| 2852 { | |
| 2853 /* lock alloc mutex */ | |
| 2854 | |
| 2855 if (rn->query) { | |
| 2856 ngx_resolver_free_locked(r, rn->query); | |
| 2857 } | |
| 2858 | |
| 2859 if (rn->name) { | |
| 2860 ngx_resolver_free_locked(r, rn->name); | |
| 2861 } | |
| 2862 | |
| 2863 if (rn->cnlen) { | |
| 2864 ngx_resolver_free_locked(r, rn->u.cname); | |
| 2865 } | |
| 2866 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2867 if (rn->naddrs > 1 && rn->naddrs != (u_short) -1) { |
| 1649 | 2868 ngx_resolver_free_locked(r, rn->u.addrs); |
| 2869 } | |
| 2870 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2871 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2872 if (rn->naddrs6 > 1 && rn->naddrs6 != (u_short) -1) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2873 ngx_resolver_free_locked(r, rn->u6.addrs6); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2874 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2875 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2876 |
| 1649 | 2877 ngx_resolver_free_locked(r, rn); |
| 2878 | |
| 2879 /* unlock alloc mutex */ | |
| 2880 } | |
| 2881 | |
| 2882 | |
| 2883 static void * | |
| 2884 ngx_resolver_alloc(ngx_resolver_t *r, size_t size) | |
| 2885 { | |
| 2886 u_char *p; | |
| 2887 | |
| 2888 /* lock alloc mutex */ | |
| 2889 | |
| 2890 p = ngx_alloc(size, r->log); | |
| 2891 | |
| 2892 /* unlock alloc mutex */ | |
| 2893 | |
| 2894 return p; | |
| 2895 } | |
| 2896 | |
| 2897 | |
| 1903 | 2898 static void * |
| 1649 | 2899 ngx_resolver_calloc(ngx_resolver_t *r, size_t size) |
| 2900 { | |
| 2901 u_char *p; | |
| 2902 | |
| 2903 p = ngx_resolver_alloc(r, size); | |
| 2904 | |
| 2905 if (p) { | |
| 2906 ngx_memzero(p, size); | |
| 2907 } | |
| 2908 | |
| 2909 return p; | |
| 2910 } | |
| 2911 | |
| 2912 | |
| 2913 static void | |
| 2914 ngx_resolver_free(ngx_resolver_t *r, void *p) | |
| 2915 { | |
| 2916 /* lock alloc mutex */ | |
| 2917 | |
| 2918 ngx_free(p); | |
| 2919 | |
| 2920 /* unlock alloc mutex */ | |
| 2921 } | |
| 2922 | |
| 2923 | |
| 2924 static void | |
| 2925 ngx_resolver_free_locked(ngx_resolver_t *r, void *p) | |
| 2926 { | |
| 2927 ngx_free(p); | |
| 2928 } | |
| 2929 | |
| 2930 | |
| 2931 static void * | |
| 2932 ngx_resolver_dup(ngx_resolver_t *r, void *src, size_t size) | |
| 2933 { | |
| 2934 void *dst; | |
| 2935 | |
| 2936 dst = ngx_resolver_alloc(r, size); | |
| 2937 | |
| 2938 if (dst == NULL) { | |
| 2939 return dst; | |
| 2940 } | |
| 2941 | |
| 2942 ngx_memcpy(dst, src, size); | |
| 2943 | |
| 2944 return dst; | |
| 2945 } | |
| 2946 | |
| 2947 | |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
2948 static ngx_addr_t * |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2949 ngx_resolver_export(ngx_resolver_t *r, ngx_resolver_node_t *rn, |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
2950 ngx_uint_t rotate) |
|
4871
c85cefbdaafe
Resolver: cached addresses are returned with random rotation now.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4784
diff
changeset
|
2951 { |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2952 ngx_addr_t *dst; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2953 ngx_uint_t d, i, j, n; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2954 u_char (*sockaddr)[NGX_SOCKADDRLEN]; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2955 in_addr_t *addr; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2956 struct sockaddr_in *sin; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2957 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2958 struct in6_addr *addr6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2959 struct sockaddr_in6 *sin6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2960 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2961 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2962 n = rn->naddrs; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2963 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2964 n += rn->naddrs6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2965 #endif |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
2966 |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
2967 dst = ngx_resolver_calloc(r, n * sizeof(ngx_addr_t)); |
|
4892
063ac68d89dc
Resolver: added missing memory allocation error handling.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4871
diff
changeset
|
2968 if (dst == NULL) { |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
2969 return NULL; |
|
4892
063ac68d89dc
Resolver: added missing memory allocation error handling.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4871
diff
changeset
|
2970 } |
|
063ac68d89dc
Resolver: added missing memory allocation error handling.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4871
diff
changeset
|
2971 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2972 sockaddr = ngx_resolver_calloc(r, n * NGX_SOCKADDRLEN); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2973 if (sockaddr == NULL) { |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
2974 ngx_resolver_free(r, dst); |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
2975 return NULL; |
|
4871
c85cefbdaafe
Resolver: cached addresses are returned with random rotation now.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4784
diff
changeset
|
2976 } |
|
c85cefbdaafe
Resolver: cached addresses are returned with random rotation now.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4784
diff
changeset
|
2977 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2978 i = 0; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2979 d = rotate ? ngx_random() % n : 0; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2980 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2981 if (rn->naddrs) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2982 j = rotate ? ngx_random() % rn->naddrs : 0; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2983 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2984 addr = (rn->naddrs == 1) ? &rn->u.addr : rn->u.addrs; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2985 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2986 do { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2987 sin = (struct sockaddr_in *) sockaddr[d]; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2988 sin->sin_family = AF_INET; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2989 sin->sin_addr.s_addr = addr[j++]; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2990 dst[d].sockaddr = (struct sockaddr *) sin; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2991 dst[d++].socklen = sizeof(struct sockaddr_in); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2992 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2993 if (d == n) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2994 d = 0; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2995 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2996 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2997 if (j == rn->naddrs) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2998 j = 0; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
2999 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3000 } while (++i < rn->naddrs); |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
5474
diff
changeset
|
3001 } |
|
4871
c85cefbdaafe
Resolver: cached addresses are returned with random rotation now.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4784
diff
changeset
|
3002 |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3003 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3004 if (rn->naddrs6) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3005 j = rotate ? ngx_random() % rn->naddrs6 : 0; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3006 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3007 addr6 = (rn->naddrs6 == 1) ? &rn->u6.addr6 : rn->u6.addrs6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3008 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3009 do { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3010 sin6 = (struct sockaddr_in6 *) sockaddr[d]; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3011 sin6->sin6_family = AF_INET6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3012 ngx_memcpy(sin6->sin6_addr.s6_addr, addr6[j++].s6_addr, 16); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3013 dst[d].sockaddr = (struct sockaddr *) sin6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3014 dst[d++].socklen = sizeof(struct sockaddr_in6); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3015 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3016 if (d == n) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3017 d = 0; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3018 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3019 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3020 if (j == rn->naddrs6) { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3021 j = 0; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3022 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3023 } while (++i < n); |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3024 } |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3025 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
3026 |
|
4871
c85cefbdaafe
Resolver: cached addresses are returned with random rotation now.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4784
diff
changeset
|
3027 return dst; |
|
c85cefbdaafe
Resolver: cached addresses are returned with random rotation now.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4784
diff
changeset
|
3028 } |
|
c85cefbdaafe
Resolver: cached addresses are returned with random rotation now.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4784
diff
changeset
|
3029 |
|
c85cefbdaafe
Resolver: cached addresses are returned with random rotation now.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4784
diff
changeset
|
3030 |
| 1649 | 3031 char * |
| 3032 ngx_resolver_strerror(ngx_int_t err) | |
| 3033 { | |
| 3034 static char *errors[] = { | |
| 3035 "Format error", /* FORMERR */ | |
| 3036 "Server failure", /* SERVFAIL */ | |
| 3037 "Host not found", /* NXDOMAIN */ | |
| 3038 "Unimplemented", /* NOTIMP */ | |
| 3039 "Operation refused" /* REFUSED */ | |
| 3040 }; | |
| 3041 | |
| 3042 if (err > 0 && err < 6) { | |
| 3043 return errors[err - 1]; | |
| 3044 } | |
| 3045 | |
| 3046 if (err == NGX_RESOLVE_TIMEDOUT) { | |
| 3047 return "Operation timed out"; | |
| 3048 } | |
| 3049 | |
| 3050 return "Unknown error"; | |
| 3051 } | |
| 3052 | |
| 3053 | |
|
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3054 static u_char * |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3055 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
|
3056 { |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3057 u_char *p; |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3058 ngx_udp_connection_t *uc; |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3059 |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3060 p = buf; |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3061 |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3062 if (log->action) { |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3063 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
|
3064 len -= p - buf; |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3065 } |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3066 |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3067 uc = log->data; |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3068 |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3069 if (uc) { |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3070 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
|
3071 } |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3072 |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3073 return p; |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3074 } |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3075 |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3076 |
| 1649 | 3077 ngx_int_t |
| 3078 ngx_udp_connect(ngx_udp_connection_t *uc) | |
| 3079 { | |
| 3080 int rc; | |
| 3081 ngx_int_t event; | |
| 3082 ngx_event_t *rev, *wev; | |
| 3083 ngx_socket_t s; | |
| 3084 ngx_connection_t *c; | |
| 3085 | |
|
4671
af9342747669
Support for IPv6 literals and an optional port in resolver.
Ruslan Ermilov <ru@nginx.com>
parents:
4653
diff
changeset
|
3086 s = ngx_socket(uc->sockaddr->sa_family, SOCK_DGRAM, 0); |
| 583 | 3087 |
|
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3088 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, &uc->log, 0, "UDP socket %d", s); |
| 583 | 3089 |
|
5360
3d2d3e1cf427
Win32: MinGW GCC compatibility.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4892
diff
changeset
|
3090 if (s == (ngx_socket_t) -1) { |
|
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3091 ngx_log_error(NGX_LOG_ALERT, &uc->log, ngx_socket_errno, |
| 583 | 3092 ngx_socket_n " failed"); |
| 3093 return NGX_ERROR; | |
| 3094 } | |
| 3095 | |
|
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3096 c = ngx_get_connection(s, &uc->log); |
| 583 | 3097 |
| 3098 if (c == NULL) { | |
| 3099 if (ngx_close_socket(s) == -1) { | |
|
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3100 ngx_log_error(NGX_LOG_ALERT, &uc->log, ngx_socket_errno, |
| 583 | 3101 ngx_close_socket_n "failed"); |
| 3102 } | |
| 3103 | |
| 3104 return NGX_ERROR; | |
| 3105 } | |
| 3106 | |
| 1649 | 3107 if (ngx_nonblocking(s) == -1) { |
|
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3108 ngx_log_error(NGX_LOG_ALERT, &uc->log, ngx_socket_errno, |
| 1649 | 3109 ngx_nonblocking_n " failed"); |
| 3110 | |
|
5582
545a4d393e2f
Resolver: properly handle connect() failures.
Ruslan Ermilov <ru@nginx.com>
parents:
5505
diff
changeset
|
3111 goto failed; |
| 1649 | 3112 } |
| 3113 | |
| 583 | 3114 rev = c->read; |
| 3115 wev = c->write; | |
| 3116 | |
|
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3117 rev->log = &uc->log; |
|
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3118 wev->log = &uc->log; |
| 1649 | 3119 |
| 3120 uc->connection = c; | |
| 583 | 3121 |
| 3122 c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1); | |
| 3123 | |
|
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3124 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, &uc->log, 0, |
|
5600
957d734362ed
Fixed format specifier in logging of "c->number".
Sergey Kandaurov <pluknet@nginx.com>
parents:
5582
diff
changeset
|
3125 "connect to %V, fd:%d #%uA", &uc->server, s, c->number); |
| 1649 | 3126 |
| 3127 rc = connect(s, uc->sockaddr, uc->socklen); | |
| 3128 | |
| 3129 /* TODO: aio, iocp */ | |
| 583 | 3130 |
| 3131 if (rc == -1) { | |
|
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3376
diff
changeset
|
3132 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
|
3133 "connect() failed"); |
| 583 | 3134 |
|
5582
545a4d393e2f
Resolver: properly handle connect() failures.
Ruslan Ermilov <ru@nginx.com>
parents:
5505
diff
changeset
|
3135 goto failed; |
| 583 | 3136 } |
| 3137 | |
| 1649 | 3138 /* UDP sockets are always ready to write */ |
| 3139 wev->ready = 1; | |
| 3140 | |
| 3141 if (ngx_add_event) { | |
| 3142 | |
| 3143 event = (ngx_event_flags & NGX_USE_CLEAR_EVENT) ? | |
| 3144 /* kqueue, epoll */ NGX_CLEAR_EVENT: | |
| 3145 /* select, poll, /dev/poll */ NGX_LEVEL_EVENT; | |
| 3146 /* eventport event type has no meaning: oneshot only */ | |
| 3147 | |
| 3148 if (ngx_add_event(rev, NGX_READ_EVENT, event) != NGX_OK) { | |
|
5582
545a4d393e2f
Resolver: properly handle connect() failures.
Ruslan Ermilov <ru@nginx.com>
parents:
5505
diff
changeset
|
3149 goto failed; |
| 1649 | 3150 } |
| 3151 | |
| 3152 } else { | |
| 3153 /* rtsig */ | |
| 3154 | |
| 583 | 3155 if (ngx_add_conn(c) == NGX_ERROR) { |
|
5582
545a4d393e2f
Resolver: properly handle connect() failures.
Ruslan Ermilov <ru@nginx.com>
parents:
5505
diff
changeset
|
3156 goto failed; |
| 583 | 3157 } |
| 3158 } | |
| 3159 | |
| 3160 return NGX_OK; | |
|
5582
545a4d393e2f
Resolver: properly handle connect() failures.
Ruslan Ermilov <ru@nginx.com>
parents:
5505
diff
changeset
|
3161 |
|
545a4d393e2f
Resolver: properly handle connect() failures.
Ruslan Ermilov <ru@nginx.com>
parents:
5505
diff
changeset
|
3162 failed: |
|
545a4d393e2f
Resolver: properly handle connect() failures.
Ruslan Ermilov <ru@nginx.com>
parents:
5505
diff
changeset
|
3163 |
|
545a4d393e2f
Resolver: properly handle connect() failures.
Ruslan Ermilov <ru@nginx.com>
parents:
5505
diff
changeset
|
3164 ngx_close_connection(c); |
|
545a4d393e2f
Resolver: properly handle connect() failures.
Ruslan Ermilov <ru@nginx.com>
parents:
5505
diff
changeset
|
3165 uc->connection = NULL; |
|
545a4d393e2f
Resolver: properly handle connect() failures.
Ruslan Ermilov <ru@nginx.com>
parents:
5505
diff
changeset
|
3166 |
|
545a4d393e2f
Resolver: properly handle connect() failures.
Ruslan Ermilov <ru@nginx.com>
parents:
5505
diff
changeset
|
3167 return NGX_ERROR; |
| 583 | 3168 } |