Mercurial > hg > nginx
annotate src/core/ngx_inet.c @ 2202:2300ab9b069e
*) refactor ngx_ptocidr()
*) allow address without bitmask
*) thus now ngx_http_geo_module accepts addresses without bitmask
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Tue, 26 Aug 2008 14:19:37 +0000 |
| parents | fd15c193572d |
| children | 8e5bf1bc87e2 |
| rev | line source |
|---|---|
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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10 |
| 2200 | 11 static ngx_int_t ngx_parse_unix_domain_url(ngx_pool_t *pool, ngx_url_t *u); |
| 12 static ngx_int_t ngx_parse_inet_url(ngx_pool_t *pool, ngx_url_t *u); | |
| 13 | |
| 14 | |
| 1647 | 15 /* AF_INET only */ |
| 16 | |
| 17 in_addr_t | |
| 18 ngx_inet_addr(u_char *text, size_t len) | |
| 19 { | |
| 20 u_char *p, c; | |
| 21 in_addr_t addr; | |
| 22 ngx_uint_t octet, n; | |
| 23 | |
| 24 addr = 0; | |
| 25 octet = 0; | |
| 26 n = 0; | |
| 27 | |
| 28 for (p = text; p < text + len; p++) { | |
| 29 | |
| 30 c = *p; | |
| 31 | |
| 32 if (c >= '0' && c <= '9') { | |
| 33 octet = octet * 10 + (c - '0'); | |
| 34 continue; | |
| 35 } | |
| 36 | |
| 37 if (c == '.' && octet < 256) { | |
| 38 addr = (addr << 8) + octet; | |
| 39 octet = 0; | |
| 40 n++; | |
| 41 continue; | |
| 42 } | |
| 43 | |
| 44 return INADDR_NONE; | |
| 45 } | |
| 46 | |
| 47 if (n != 3) { | |
| 48 return INADDR_NONE; | |
| 49 } | |
| 50 | |
| 51 if (octet < 256) { | |
| 52 addr = (addr << 8) + octet; | |
| 53 return htonl(addr); | |
| 54 } | |
| 55 | |
| 56 return INADDR_NONE; | |
| 57 } | |
| 58 | |
| 59 | |
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60 /* AF_INET only */ |
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61 |
| 509 | 62 size_t |
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63 ngx_sock_ntop(struct sockaddr *sa, u_char *text, size_t len) |
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64 { |
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65 u_char *p; |
| 479 | 66 struct sockaddr_in *sin; |
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67 |
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68 if (sa->sa_family == AF_INET) { |
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69 |
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70 sin = (struct sockaddr_in *) sa; |
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71 p = (u_char *) &sin->sin_addr; |
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72 |
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73 return ngx_snprintf(text, len, "%ud.%ud.%ud.%ud", |
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74 p[0], p[1], p[2], p[3]) |
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75 - text; |
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76 } |
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77 |
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78 return 0; |
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79 } |
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80 |
| 1830 | 81 |
| 509 | 82 size_t |
| 83 ngx_inet_ntop(int family, void *addr, u_char *text, size_t len) | |
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84 { |
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85 u_char *p; |
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86 |
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87 if (family == AF_INET) { |
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88 |
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89 p = (u_char *) addr; |
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90 |
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91 return ngx_snprintf(text, len, "%ud.%ud.%ud.%ud", |
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92 p[0], p[1], p[2], p[3]) |
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93 - text; |
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94 } |
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95 |
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96 return 0; |
| 1830 | 97 } |
| 98 | |
| 99 | |
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100 /* AF_INET only */ |
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101 |
| 509 | 102 ngx_int_t |
| 103 ngx_ptocidr(ngx_str_t *text, void *cidr) | |
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104 { |
| 2202 | 105 u_char *addr, *mask, *last; |
| 106 ngx_int_t shift; | |
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107 ngx_inet_cidr_t *in_cidr; |
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108 |
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109 in_cidr = cidr; |
| 2202 | 110 addr = text->data; |
| 111 last = addr + text->len; | |
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112 |
| 2202 | 113 mask = ngx_strlchr(addr, last, '/'); |
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114 |
| 2202 | 115 in_cidr->addr = ngx_inet_addr(addr, (mask ? mask : last) - addr); |
| 116 | |
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117 if (in_cidr->addr == INADDR_NONE) { |
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118 return NGX_ERROR; |
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119 } |
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120 |
| 2202 | 121 if (mask == NULL) { |
| 122 in_cidr->mask = 0xffffffff; | |
| 123 return NGX_OK; | |
| 124 } | |
| 125 | |
| 126 mask++; | |
| 127 | |
| 128 shift = ngx_atoi(mask, last - mask); | |
| 129 if (shift == NGX_ERROR) { | |
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130 return NGX_ERROR; |
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131 } |
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132 |
| 2202 | 133 if (shift == 0) { |
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134 |
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135 /* the x86 compilers use the shl instruction that shifts by modulo 32 */ |
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136 |
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137 in_cidr->mask = 0; |
| 2202 | 138 |
| 139 if (in_cidr->addr == 0) { | |
| 140 return NGX_OK; | |
| 141 } | |
| 142 | |
| 143 return NGX_DONE; | |
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144 } |
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145 |
| 2202 | 146 in_cidr->mask = htonl((ngx_uint_t) (0 - (1 << (32 - shift)))); |
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147 |
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148 if (in_cidr->addr == (in_cidr->addr & in_cidr->mask)) { |
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149 return NGX_OK; |
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150 } |
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151 |
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152 in_cidr->addr &= in_cidr->mask; |
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153 |
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154 return NGX_DONE; |
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155 } |
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156 |
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157 |
| 651 | 158 ngx_int_t |
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159 ngx_parse_url(ngx_pool_t *pool, ngx_url_t *u) |
| 651 | 160 { |
| 2200 | 161 u_char *p; |
| 651 | 162 |
| 163 p = u->url.data; | |
| 164 | |
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165 if (ngx_strncasecmp(p, (u_char *) "unix:", 5) == 0) { |
| 2200 | 166 return ngx_parse_unix_domain_url(pool, u); |
| 651 | 167 } |
| 168 | |
| 169 if ((p[0] == ':' || p[0] == '/') && !u->listen) { | |
| 170 u->err = "invalid host"; | |
| 171 return NGX_ERROR; | |
| 172 } | |
| 173 | |
| 2200 | 174 return ngx_parse_inet_url(pool, u); |
| 175 } | |
| 176 | |
| 177 | |
| 178 static ngx_int_t | |
| 179 ngx_parse_unix_domain_url(ngx_pool_t *pool, ngx_url_t *u) | |
| 180 { | |
| 181 #if (NGX_HAVE_UNIX_DOMAIN) | |
| 182 u_char *p; | |
| 183 size_t len; | |
| 184 ngx_uint_t i; | |
| 185 struct sockaddr_un *saun; | |
| 186 | |
| 187 len = u->url.len; | |
| 188 p = u->url.data; | |
| 189 | |
| 190 p += 5; | |
| 191 len -= 5; | |
| 192 | |
| 193 u->uri.len = len; | |
| 194 u->uri.data = p; | |
| 195 | |
| 196 if (u->uri_part) { | |
| 197 for (i = 0; i < len; i++) { | |
| 198 | |
| 199 if (p[i] == ':') { | |
| 200 len = i; | |
| 201 | |
| 202 u->uri.len -= len + 1; | |
| 203 u->uri.data += len + 1; | |
| 204 | |
| 205 break; | |
| 206 } | |
| 207 } | |
| 208 } | |
| 209 | |
| 210 if (len == 0) { | |
| 211 u->err = "no path in the unix domain socket"; | |
| 212 return NGX_ERROR; | |
| 213 } | |
| 214 | |
| 215 if (len + 1 > sizeof(saun->sun_path)) { | |
| 216 u->err = "too long path in the unix domain socket"; | |
| 217 return NGX_ERROR; | |
| 218 } | |
| 219 | |
| 220 u->addrs = ngx_pcalloc(pool, sizeof(ngx_peer_addr_t)); | |
| 221 if (u->addrs == NULL) { | |
| 222 return NGX_ERROR; | |
| 223 } | |
| 224 | |
| 225 saun = ngx_pcalloc(pool, sizeof(struct sockaddr_un)); | |
| 226 if (saun == NULL) { | |
| 227 return NGX_ERROR; | |
| 228 } | |
| 229 | |
| 230 u->naddrs = 1; | |
| 231 | |
| 232 saun->sun_family = AF_UNIX; | |
| 233 (void) ngx_cpystrn((u_char *) saun->sun_path, p, len + 1); | |
| 234 | |
| 235 u->addrs[0].sockaddr = (struct sockaddr *) saun; | |
| 236 u->addrs[0].socklen = sizeof(struct sockaddr_un); | |
| 237 u->addrs[0].name.len = len + 5; | |
| 238 u->addrs[0].name.data = u->url.data; | |
| 239 | |
| 240 u->host.len = len; | |
| 241 u->host.data = p; | |
| 242 | |
| 243 u->unix_socket = 1; | |
| 244 | |
| 245 return NGX_OK; | |
| 246 | |
| 247 #else | |
| 248 | |
| 249 u->err = "the unix domain sockets are not supported on this platform"; | |
| 250 | |
| 251 return NGX_ERROR; | |
| 252 | |
| 253 #endif | |
| 254 } | |
| 255 | |
| 256 | |
| 257 static ngx_int_t | |
| 258 ngx_parse_inet_url(ngx_pool_t *pool, ngx_url_t *u) | |
| 259 { | |
| 260 u_char *p, *host, *port_start; | |
| 261 size_t len, port_len; | |
| 262 ngx_int_t port; | |
| 263 ngx_uint_t i; | |
| 264 struct hostent *h; | |
| 265 | |
| 266 len = u->url.len; | |
| 267 p = u->url.data; | |
| 268 | |
| 651 | 269 u->host.data = p; |
| 906 | 270 |
| 271 port_start = NULL; | |
| 272 port_len = 0; | |
| 651 | 273 |
| 274 for (i = 0; i < len; i++) { | |
| 275 | |
| 276 if (p[i] == ':') { | |
| 906 | 277 port_start = &p[i + 1]; |
| 651 | 278 u->host.len = i; |
| 279 | |
| 280 if (!u->uri_part) { | |
| 906 | 281 port_len = len - (i + 1); |
| 651 | 282 break; |
| 283 } | |
| 284 } | |
| 285 | |
| 286 if (p[i] == '/') { | |
| 287 u->uri.len = len - i; | |
| 288 u->uri.data = &p[i]; | |
| 289 | |
| 290 if (u->host.len == 0) { | |
| 291 u->host.len = i; | |
| 292 } | |
| 293 | |
| 906 | 294 if (port_start == NULL) { |
| 884 | 295 u->no_port = 1; |
| 296 goto no_port; | |
| 651 | 297 } |
| 298 | |
| 906 | 299 port_len = &p[i] - port_start; |
| 651 | 300 |
| 906 | 301 if (port_len == 0) { |
| 651 | 302 u->err = "invalid port"; |
| 303 return NGX_ERROR; | |
| 304 } | |
| 305 | |
| 306 break; | |
| 307 } | |
| 308 } | |
| 309 | |
| 906 | 310 if (port_start) { |
| 651 | 311 |
| 906 | 312 if (port_len == 0) { |
| 313 port_len = &p[i] - port_start; | |
| 651 | 314 |
| 906 | 315 if (port_len == 0) { |
| 651 | 316 u->err = "invalid port"; |
| 317 return NGX_ERROR; | |
| 318 } | |
| 319 } | |
| 320 | |
| 906 | 321 port = ngx_atoi(port_start, port_len); |
| 651 | 322 |
| 323 if (port == NGX_ERROR || port < 1 || port > 65536) { | |
| 324 u->err = "invalid port"; | |
| 325 return NGX_ERROR; | |
| 326 } | |
| 327 | |
|
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328 u->port_text.len = port_len; |
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329 u->port_text.data = port_start; |
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330 |
| 651 | 331 } else { |
| 332 port = ngx_atoi(p, len); | |
| 333 | |
| 334 if (port == NGX_ERROR) { | |
| 335 u->host.len = len; | |
| 884 | 336 u->no_port = 1; |
| 651 | 337 |
| 884 | 338 goto no_port; |
| 651 | 339 } |
| 340 | |
| 341 u->wildcard = 1; | |
| 342 } | |
| 343 | |
| 906 | 344 u->port = (in_port_t) port; |
| 651 | 345 |
| 884 | 346 no_port: |
| 651 | 347 |
| 348 if (u->listen) { | |
| 884 | 349 |
| 906 | 350 if (u->port == 0) { |
| 351 if (u->default_port == 0) { | |
|
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352 u->err = "no port"; |
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353 return NGX_ERROR; |
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354 } |
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355 |
| 906 | 356 u->port = u->default_port; |
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357 } |
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358 |
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359 if (u->host.len == 1 && u->host.data[0] == '*') { |
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360 u->host.len = 0; |
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361 } |
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362 |
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363 /* AF_INET only */ |
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364 |
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365 if (u->host.len) { |
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366 |
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367 host = ngx_alloc(u->host.len + 1, pool->log); |
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368 if (host == NULL) { |
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369 return NGX_ERROR; |
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370 } |
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371 |
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372 (void) ngx_cpystrn(host, u->host.data, u->host.len + 1); |
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373 |
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374 u->addr.in_addr = inet_addr((const char *) host); |
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375 |
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376 if (u->addr.in_addr == INADDR_NONE) { |
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377 h = gethostbyname((const char *) host); |
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378 |
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379 if (h == NULL || h->h_addr_list[0] == NULL) { |
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380 ngx_free(host); |
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381 u->err = "host not found"; |
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382 return NGX_ERROR; |
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383 } |
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384 |
| 906 | 385 u->addr.in_addr = *(in_addr_t *) (h->h_addr_list[0]); |
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386 } |
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387 |
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388 ngx_free(host); |
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389 |
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390 } else { |
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391 u->addr.in_addr = INADDR_ANY; |
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392 } |
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393 |
| 651 | 394 return NGX_OK; |
| 395 } | |
| 396 | |
| 397 if (u->host.len == 0) { | |
| 398 u->err = "no host"; | |
| 399 return NGX_ERROR; | |
| 400 } | |
| 401 | |
| 884 | 402 if (u->no_resolve) { |
| 403 return NGX_OK; | |
| 651 | 404 } |
| 405 | |
| 906 | 406 if (u->no_port) { |
| 407 u->port = u->default_port; | |
| 408 } | |
| 409 | |
| 410 if (u->port == 0) { | |
| 411 u->err = "no port"; | |
| 412 return NGX_ERROR; | |
| 413 } | |
| 414 | |
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415 if (ngx_inet_resolve_host(pool, u) != NGX_OK) { |
| 651 | 416 return NGX_ERROR; |
| 417 } | |
| 418 | |
| 419 return NGX_OK; | |
| 420 } | |
| 421 | |
| 422 | |
| 884 | 423 ngx_int_t |
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424 ngx_inet_resolve_host(ngx_pool_t *pool, ngx_url_t *u) |
| 651 | 425 { |
| 906 | 426 u_char *p, *host; |
| 651 | 427 size_t len; |
| 428 in_addr_t in_addr; | |
| 429 ngx_uint_t i; | |
| 430 struct hostent *h; | |
| 431 struct sockaddr_in *sin; | |
| 432 | |
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433 host = ngx_alloc(u->host.len + 1, pool->log); |
| 651 | 434 if (host == NULL) { |
| 884 | 435 return NGX_ERROR; |
| 651 | 436 } |
| 437 | |
| 884 | 438 (void) ngx_cpystrn(host, u->host.data, u->host.len + 1); |
| 651 | 439 |
| 440 /* AF_INET only */ | |
| 441 | |
| 442 in_addr = inet_addr((char *) host); | |
| 443 | |
| 444 if (in_addr == INADDR_NONE) { | |
| 445 h = gethostbyname((char *) host); | |
| 446 | |
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447 ngx_free(host); |
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448 |
| 651 | 449 if (h == NULL || h->h_addr_list[0] == NULL) { |
| 884 | 450 u->err = "host not found"; |
| 451 return NGX_ERROR; | |
| 651 | 452 } |
| 453 | |
| 884 | 454 if (u->one_addr == 0) { |
| 455 for (i = 0; h->h_addr_list[i] != NULL; i++) { /* void */ } | |
| 456 | |
| 457 } else { | |
| 458 i = 1; | |
| 459 } | |
| 651 | 460 |
| 461 /* MP: ngx_shared_palloc() */ | |
| 462 | |
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463 u->addrs = ngx_pcalloc(pool, i * sizeof(ngx_peer_addr_t)); |
| 884 | 464 if (u->addrs == NULL) { |
| 465 return NGX_ERROR; | |
| 651 | 466 } |
| 467 | |
| 884 | 468 u->naddrs = i; |
| 651 | 469 |
| 470 for (i = 0; h->h_addr_list[i] != NULL; i++) { | |
| 471 | |
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472 sin = ngx_pcalloc(pool, sizeof(struct sockaddr_in)); |
| 651 | 473 if (sin == NULL) { |
| 884 | 474 return NGX_ERROR; |
| 651 | 475 } |
| 476 | |
| 477 sin->sin_family = AF_INET; | |
| 906 | 478 sin->sin_port = htons(u->port); |
| 651 | 479 sin->sin_addr.s_addr = *(in_addr_t *) (h->h_addr_list[i]); |
| 480 | |
| 884 | 481 u->addrs[i].sockaddr = (struct sockaddr *) sin; |
| 482 u->addrs[i].socklen = sizeof(struct sockaddr_in); | |
| 651 | 483 |
|
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484 len = NGX_INET_ADDRSTRLEN + sizeof(":65536") - 1; |
| 651 | 485 |
| 2049 | 486 p = ngx_pnalloc(pool, len); |
| 906 | 487 if (p == NULL) { |
| 884 | 488 return NGX_ERROR; |
| 651 | 489 } |
| 490 | |
|
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491 len = ngx_sock_ntop((struct sockaddr *) sin, p, len); |
| 651 | 492 |
| 906 | 493 u->addrs[i].name.len = ngx_sprintf(&p[len], ":%d", u->port) - p; |
| 494 u->addrs[i].name.data = p; | |
| 651 | 495 } |
| 496 | |
| 497 } else { | |
| 498 | |
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499 ngx_free(host); |
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500 |
| 651 | 501 /* MP: ngx_shared_palloc() */ |
| 502 | |
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503 u->addrs = ngx_pcalloc(pool, sizeof(ngx_peer_addr_t)); |
| 884 | 504 if (u->addrs == NULL) { |
| 505 return NGX_ERROR; | |
| 651 | 506 } |
| 507 | |
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508 sin = ngx_pcalloc(pool, sizeof(struct sockaddr_in)); |
| 651 | 509 if (sin == NULL) { |
| 884 | 510 return NGX_ERROR; |
| 651 | 511 } |
| 512 | |
| 884 | 513 u->naddrs = 1; |
| 651 | 514 |
| 515 sin->sin_family = AF_INET; | |
| 906 | 516 sin->sin_port = htons(u->port); |
| 651 | 517 sin->sin_addr.s_addr = in_addr; |
| 518 | |
| 884 | 519 u->addrs[0].sockaddr = (struct sockaddr *) sin; |
| 520 u->addrs[0].socklen = sizeof(struct sockaddr_in); | |
| 651 | 521 |
| 2049 | 522 p = ngx_pnalloc(pool, u->host.len + sizeof(":65536") - 1); |
| 906 | 523 if (p == NULL) { |
| 884 | 524 return NGX_ERROR; |
| 651 | 525 } |
| 526 | |
| 906 | 527 u->addrs[0].name.len = ngx_sprintf(p, "%V:%d", &u->host, u->port) - p; |
| 528 u->addrs[0].name.data = p; | |
| 651 | 529 } |
| 530 | |
| 884 | 531 return NGX_OK; |
| 651 | 532 } |