Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 1 | /*************************************************************************** |
| 2 | * _ _ ____ _ |
| 3 | * Project ___| | | | _ \| | |
| 4 | * / __| | | | |_) | | |
| 5 | * | (__| |_| | _ <| |___ |
| 6 | * \___|\___/|_| \_\_____| |
| 7 | * |
| 8 | * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al. |
| 9 | * |
| 10 | * This software is licensed as described in the file COPYING, which |
| 11 | * you should have received as part of this distribution. The terms |
| 12 | * are also available at http://curl.haxx.se/docs/copyright.html. |
| 13 | * |
| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| 15 | * copies of the Software, and permit persons to whom the Software is |
| 16 | * furnished to do so, under the terms of the COPYING file. |
| 17 | * |
| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| 19 | * KIND, either express or implied. |
| 20 | * |
| 21 | ***************************************************************************/ |
| 22 | |
| 23 | #include "curl_setup.h" |
| 24 | |
| 25 | #ifdef HAVE_NETINET_IN_H |
| 26 | #include <netinet/in.h> |
| 27 | #endif |
| 28 | #ifdef HAVE_NETDB_H |
| 29 | #include <netdb.h> |
| 30 | #endif |
| 31 | #ifdef HAVE_ARPA_INET_H |
| 32 | #include <arpa/inet.h> |
| 33 | #endif |
| 34 | #ifdef __VMS |
| 35 | #include <in.h> |
| 36 | #include <inet.h> |
| 37 | #endif |
| 38 | |
| 39 | #if defined(USE_THREADS_POSIX) |
| 40 | # ifdef HAVE_PTHREAD_H |
| 41 | # include <pthread.h> |
| 42 | # endif |
| 43 | #elif defined(USE_THREADS_WIN32) |
| 44 | # ifdef HAVE_PROCESS_H |
| 45 | # include <process.h> |
| 46 | # endif |
| 47 | #endif |
| 48 | |
| 49 | #if (defined(NETWARE) && defined(__NOVELL_LIBC__)) |
| 50 | #undef in_addr_t |
| 51 | #define in_addr_t unsigned long |
| 52 | #endif |
| 53 | |
| 54 | #ifdef HAVE_GETADDRINFO |
| 55 | # define RESOLVER_ENOMEM EAI_MEMORY |
| 56 | #else |
| 57 | # define RESOLVER_ENOMEM ENOMEM |
| 58 | #endif |
| 59 | |
| 60 | #include "urldata.h" |
| 61 | #include "sendf.h" |
| 62 | #include "hostip.h" |
| 63 | #include "hash.h" |
| 64 | #include "share.h" |
| 65 | #include "strerror.h" |
| 66 | #include "url.h" |
| 67 | #include "multiif.h" |
| 68 | #include "inet_pton.h" |
| 69 | #include "inet_ntop.h" |
| 70 | #include "curl_threads.h" |
| 71 | #include "connect.h" |
| 72 | #include "curl_printf.h" |
| 73 | #include "curl_memory.h" |
| 74 | |
| 75 | /* The last #include file should be: */ |
| 76 | #include "memdebug.h" |
| 77 | |
| 78 | /*********************************************************************** |
| 79 | * Only for threaded name resolves builds |
| 80 | **********************************************************************/ |
| 81 | #ifdef CURLRES_THREADED |
| 82 | |
| 83 | /* |
| 84 | * Curl_resolver_global_init() |
| 85 | * Called from curl_global_init() to initialize global resolver environment. |
| 86 | * Does nothing here. |
| 87 | */ |
| 88 | int Curl_resolver_global_init(void) |
| 89 | { |
| 90 | return CURLE_OK; |
| 91 | } |
| 92 | |
| 93 | /* |
| 94 | * Curl_resolver_global_cleanup() |
| 95 | * Called from curl_global_cleanup() to destroy global resolver environment. |
| 96 | * Does nothing here. |
| 97 | */ |
| 98 | void Curl_resolver_global_cleanup(void) |
| 99 | { |
| 100 | } |
| 101 | |
| 102 | /* |
| 103 | * Curl_resolver_init() |
| 104 | * Called from curl_easy_init() -> Curl_open() to initialize resolver |
| 105 | * URL-state specific environment ('resolver' member of the UrlState |
| 106 | * structure). Does nothing here. |
| 107 | */ |
| 108 | CURLcode Curl_resolver_init(void **resolver) |
| 109 | { |
| 110 | (void)resolver; |
| 111 | return CURLE_OK; |
| 112 | } |
| 113 | |
| 114 | /* |
| 115 | * Curl_resolver_cleanup() |
| 116 | * Called from curl_easy_cleanup() -> Curl_close() to cleanup resolver |
| 117 | * URL-state specific environment ('resolver' member of the UrlState |
| 118 | * structure). Does nothing here. |
| 119 | */ |
| 120 | void Curl_resolver_cleanup(void *resolver) |
| 121 | { |
| 122 | (void)resolver; |
| 123 | } |
| 124 | |
| 125 | /* |
| 126 | * Curl_resolver_duphandle() |
| 127 | * Called from curl_easy_duphandle() to duplicate resolver URL state-specific |
| 128 | * environment ('resolver' member of the UrlState structure). Does nothing |
| 129 | * here. |
| 130 | */ |
| 131 | int Curl_resolver_duphandle(void **to, void *from) |
| 132 | { |
| 133 | (void)to; |
| 134 | (void)from; |
| 135 | return CURLE_OK; |
| 136 | } |
| 137 | |
| 138 | static void destroy_async_data(struct Curl_async *); |
| 139 | |
| 140 | /* |
| 141 | * Cancel all possibly still on-going resolves for this connection. |
| 142 | */ |
| 143 | void Curl_resolver_cancel(struct connectdata *conn) |
| 144 | { |
| 145 | destroy_async_data(&conn->async); |
| 146 | } |
| 147 | |
| 148 | /* This function is used to init a threaded resolve */ |
| 149 | static bool init_resolve_thread(struct connectdata *conn, |
| 150 | const char *hostname, int port, |
| 151 | const struct addrinfo *hints); |
| 152 | |
| 153 | |
| 154 | /* Data for synchronization between resolver thread and its parent */ |
| 155 | struct thread_sync_data { |
| 156 | curl_mutex_t * mtx; |
| 157 | int done; |
| 158 | |
| 159 | char * hostname; /* hostname to resolve, Curl_async.hostname |
| 160 | duplicate */ |
| 161 | int port; |
| 162 | int sock_error; |
| 163 | Curl_addrinfo *res; |
| 164 | #ifdef HAVE_GETADDRINFO |
| 165 | struct addrinfo hints; |
| 166 | #endif |
| 167 | struct thread_data *td; /* for thread-self cleanup */ |
| 168 | }; |
| 169 | |
| 170 | struct thread_data { |
| 171 | curl_thread_t thread_hnd; |
| 172 | unsigned int poll_interval; |
| 173 | long interval_end; |
| 174 | struct thread_sync_data tsd; |
| 175 | }; |
| 176 | |
| 177 | static struct thread_sync_data *conn_thread_sync_data(struct connectdata *conn) |
| 178 | { |
| 179 | return &(((struct thread_data *)conn->async.os_specific)->tsd); |
| 180 | } |
| 181 | |
| 182 | #define CONN_THREAD_SYNC_DATA(conn) &(((conn)->async.os_specific)->tsd); |
| 183 | |
| 184 | /* Destroy resolver thread synchronization data */ |
| 185 | static |
| 186 | void destroy_thread_sync_data(struct thread_sync_data * tsd) |
| 187 | { |
| 188 | if(tsd->mtx) { |
| 189 | Curl_mutex_destroy(tsd->mtx); |
| 190 | free(tsd->mtx); |
| 191 | } |
| 192 | |
| 193 | free(tsd->hostname); |
| 194 | |
| 195 | if(tsd->res) |
| 196 | Curl_freeaddrinfo(tsd->res); |
| 197 | |
| 198 | memset(tsd, 0, sizeof(*tsd)); |
| 199 | } |
| 200 | |
| 201 | /* Initialize resolver thread synchronization data */ |
| 202 | static |
| 203 | int init_thread_sync_data(struct thread_data * td, |
| 204 | const char * hostname, |
| 205 | int port, |
| 206 | const struct addrinfo *hints) |
| 207 | { |
| 208 | struct thread_sync_data *tsd = &td->tsd; |
| 209 | |
| 210 | memset(tsd, 0, sizeof(*tsd)); |
| 211 | |
| 212 | tsd->td = td; |
| 213 | tsd->port = port; |
| 214 | #ifdef HAVE_GETADDRINFO |
| 215 | DEBUGASSERT(hints); |
| 216 | tsd->hints = *hints; |
| 217 | #else |
| 218 | (void) hints; |
| 219 | #endif |
| 220 | |
| 221 | tsd->mtx = malloc(sizeof(curl_mutex_t)); |
| 222 | if(tsd->mtx == NULL) |
| 223 | goto err_exit; |
| 224 | |
| 225 | Curl_mutex_init(tsd->mtx); |
| 226 | |
| 227 | tsd->sock_error = CURL_ASYNC_SUCCESS; |
| 228 | |
| 229 | /* Copying hostname string because original can be destroyed by parent |
| 230 | * thread during gethostbyname execution. |
| 231 | */ |
| 232 | tsd->hostname = strdup(hostname); |
| 233 | if(!tsd->hostname) |
| 234 | goto err_exit; |
| 235 | |
| 236 | return 1; |
| 237 | |
| 238 | err_exit: |
| 239 | /* Memory allocation failed */ |
| 240 | destroy_thread_sync_data(tsd); |
| 241 | return 0; |
| 242 | } |
| 243 | |
| 244 | static int getaddrinfo_complete(struct connectdata *conn) |
| 245 | { |
| 246 | struct thread_sync_data *tsd = conn_thread_sync_data(conn); |
| 247 | int rc; |
| 248 | |
| 249 | rc = Curl_addrinfo_callback(conn, tsd->sock_error, tsd->res); |
| 250 | /* The tsd->res structure has been copied to async.dns and perhaps the DNS |
| 251 | cache. Set our copy to NULL so destroy_thread_sync_data doesn't free it. |
| 252 | */ |
| 253 | tsd->res = NULL; |
| 254 | |
| 255 | return rc; |
| 256 | } |
| 257 | |
| 258 | |
| 259 | #ifdef HAVE_GETADDRINFO |
| 260 | |
| 261 | /* |
| 262 | * getaddrinfo_thread() resolves a name and then exits. |
| 263 | * |
| 264 | * For builds without ARES, but with ENABLE_IPV6, create a resolver thread |
| 265 | * and wait on it. |
| 266 | */ |
| 267 | static unsigned int CURL_STDCALL getaddrinfo_thread (void *arg) |
| 268 | { |
| 269 | struct thread_sync_data *tsd = (struct thread_sync_data*)arg; |
| 270 | struct thread_data *td = tsd->td; |
| 271 | char service[12]; |
| 272 | int rc; |
| 273 | |
| 274 | snprintf(service, sizeof(service), "%d", tsd->port); |
| 275 | |
| 276 | rc = Curl_getaddrinfo_ex(tsd->hostname, service, &tsd->hints, &tsd->res); |
| 277 | |
| 278 | if(rc != 0) { |
| 279 | tsd->sock_error = SOCKERRNO?SOCKERRNO:rc; |
| 280 | if(tsd->sock_error == 0) |
| 281 | tsd->sock_error = RESOLVER_ENOMEM; |
| 282 | } |
| 283 | |
| 284 | Curl_mutex_acquire(tsd->mtx); |
| 285 | if(tsd->done) { |
| 286 | /* too late, gotta clean up the mess */ |
| 287 | Curl_mutex_release(tsd->mtx); |
| 288 | destroy_thread_sync_data(tsd); |
| 289 | free(td); |
| 290 | } |
| 291 | else { |
| 292 | tsd->done = 1; |
| 293 | Curl_mutex_release(tsd->mtx); |
| 294 | } |
| 295 | |
| 296 | return 0; |
| 297 | } |
| 298 | |
| 299 | #else /* HAVE_GETADDRINFO */ |
| 300 | |
| 301 | /* |
| 302 | * gethostbyname_thread() resolves a name and then exits. |
| 303 | */ |
| 304 | static unsigned int CURL_STDCALL gethostbyname_thread (void *arg) |
| 305 | { |
| 306 | struct thread_sync_data *tsd = (struct thread_sync_data *)arg; |
| 307 | struct thread_data *td = tsd->td; |
| 308 | |
| 309 | tsd->res = Curl_ipv4_resolve_r(tsd->hostname, tsd->port); |
| 310 | |
| 311 | if(!tsd->res) { |
| 312 | tsd->sock_error = SOCKERRNO; |
| 313 | if(tsd->sock_error == 0) |
| 314 | tsd->sock_error = RESOLVER_ENOMEM; |
| 315 | } |
| 316 | |
| 317 | Curl_mutex_acquire(tsd->mtx); |
| 318 | if(tsd->done) { |
| 319 | /* too late, gotta clean up the mess */ |
| 320 | Curl_mutex_release(tsd->mtx); |
| 321 | destroy_thread_sync_data(tsd); |
| 322 | free(td); |
| 323 | } |
| 324 | else { |
| 325 | tsd->done = 1; |
| 326 | Curl_mutex_release(tsd->mtx); |
| 327 | } |
| 328 | |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | #endif /* HAVE_GETADDRINFO */ |
| 333 | |
| 334 | /* |
| 335 | * destroy_async_data() cleans up async resolver data and thread handle. |
| 336 | */ |
| 337 | static void destroy_async_data (struct Curl_async *async) |
| 338 | { |
| 339 | if(async->os_specific) { |
| 340 | struct thread_data *td = (struct thread_data*) async->os_specific; |
| 341 | int done; |
| 342 | |
| 343 | /* |
| 344 | * if the thread is still blocking in the resolve syscall, detach it and |
| 345 | * let the thread do the cleanup... |
| 346 | */ |
| 347 | Curl_mutex_acquire(td->tsd.mtx); |
| 348 | done = td->tsd.done; |
| 349 | td->tsd.done = 1; |
| 350 | Curl_mutex_release(td->tsd.mtx); |
| 351 | |
| 352 | if(!done) { |
| 353 | Curl_thread_destroy(td->thread_hnd); |
| 354 | } |
| 355 | else { |
| 356 | if(td->thread_hnd != curl_thread_t_null) |
| 357 | Curl_thread_join(&td->thread_hnd); |
| 358 | |
| 359 | destroy_thread_sync_data(&td->tsd); |
| 360 | |
| 361 | free(async->os_specific); |
| 362 | } |
| 363 | } |
| 364 | async->os_specific = NULL; |
| 365 | |
| 366 | free(async->hostname); |
| 367 | async->hostname = NULL; |
| 368 | } |
| 369 | |
| 370 | /* |
| 371 | * init_resolve_thread() starts a new thread that performs the actual |
| 372 | * resolve. This function returns before the resolve is done. |
| 373 | * |
| 374 | * Returns FALSE in case of failure, otherwise TRUE. |
| 375 | */ |
| 376 | static bool init_resolve_thread (struct connectdata *conn, |
| 377 | const char *hostname, int port, |
| 378 | const struct addrinfo *hints) |
| 379 | { |
| 380 | struct thread_data *td = calloc(1, sizeof(struct thread_data)); |
| 381 | int err = RESOLVER_ENOMEM; |
| 382 | |
| 383 | conn->async.os_specific = (void*) td; |
| 384 | if(!td) |
| 385 | goto err_exit; |
| 386 | |
| 387 | conn->async.port = port; |
| 388 | conn->async.done = FALSE; |
| 389 | conn->async.status = 0; |
| 390 | conn->async.dns = NULL; |
| 391 | td->thread_hnd = curl_thread_t_null; |
| 392 | |
| 393 | if(!init_thread_sync_data(td, hostname, port, hints)) |
| 394 | goto err_exit; |
| 395 | |
| 396 | free(conn->async.hostname); |
| 397 | conn->async.hostname = strdup(hostname); |
| 398 | if(!conn->async.hostname) |
| 399 | goto err_exit; |
| 400 | |
| 401 | #ifdef HAVE_GETADDRINFO |
| 402 | td->thread_hnd = Curl_thread_create(getaddrinfo_thread, &td->tsd); |
| 403 | #else |
| 404 | td->thread_hnd = Curl_thread_create(gethostbyname_thread, &td->tsd); |
| 405 | #endif |
| 406 | |
| 407 | if(!td->thread_hnd) { |
| 408 | #ifndef _WIN32_WCE |
| 409 | err = errno; |
| 410 | #endif |
| 411 | goto err_exit; |
| 412 | } |
| 413 | |
| 414 | return TRUE; |
| 415 | |
| 416 | err_exit: |
| 417 | destroy_async_data(&conn->async); |
| 418 | |
| 419 | SET_ERRNO(err); |
| 420 | |
| 421 | return FALSE; |
| 422 | } |
| 423 | |
| 424 | /* |
| 425 | * resolver_error() calls failf() with the appropriate message after a resolve |
| 426 | * error |
| 427 | */ |
| 428 | |
| 429 | static CURLcode resolver_error(struct connectdata *conn) |
| 430 | { |
| 431 | const char *host_or_proxy; |
| 432 | CURLcode result; |
| 433 | |
| 434 | if(conn->bits.httpproxy) { |
| 435 | host_or_proxy = "proxy"; |
| 436 | result = CURLE_COULDNT_RESOLVE_PROXY; |
| 437 | } |
| 438 | else { |
| 439 | host_or_proxy = "host"; |
| 440 | result = CURLE_COULDNT_RESOLVE_HOST; |
| 441 | } |
| 442 | |
| 443 | failf(conn->data, "Could not resolve %s: %s", host_or_proxy, |
| 444 | conn->async.hostname); |
| 445 | |
| 446 | return result; |
| 447 | } |
| 448 | |
| 449 | /* |
| 450 | * Curl_resolver_wait_resolv() |
| 451 | * |
| 452 | * waits for a resolve to finish. This function should be avoided since using |
| 453 | * this risk getting the multi interface to "hang". |
| 454 | * |
| 455 | * If 'entry' is non-NULL, make it point to the resolved dns entry |
| 456 | * |
| 457 | * This is the version for resolves-in-a-thread. |
| 458 | */ |
| 459 | CURLcode Curl_resolver_wait_resolv(struct connectdata *conn, |
| 460 | struct Curl_dns_entry **entry) |
| 461 | { |
| 462 | struct thread_data *td = (struct thread_data*) conn->async.os_specific; |
| 463 | CURLcode result = CURLE_OK; |
| 464 | |
| 465 | DEBUGASSERT(conn && td); |
| 466 | |
| 467 | /* wait for the thread to resolve the name */ |
| 468 | if(Curl_thread_join(&td->thread_hnd)) |
| 469 | result = getaddrinfo_complete(conn); |
| 470 | else |
| 471 | DEBUGASSERT(0); |
| 472 | |
| 473 | conn->async.done = TRUE; |
| 474 | |
| 475 | if(entry) |
| 476 | *entry = conn->async.dns; |
| 477 | |
| 478 | if(!conn->async.dns) |
| 479 | /* a name was not resolved, report error */ |
| 480 | result = resolver_error(conn); |
| 481 | |
| 482 | destroy_async_data(&conn->async); |
| 483 | |
| 484 | if(!conn->async.dns) |
| 485 | connclose(conn, "asynch resolve failed"); |
| 486 | |
| 487 | return result; |
| 488 | } |
| 489 | |
| 490 | /* |
| 491 | * Curl_resolver_is_resolved() is called repeatedly to check if a previous |
| 492 | * name resolve request has completed. It should also make sure to time-out if |
| 493 | * the operation seems to take too long. |
| 494 | */ |
| 495 | CURLcode Curl_resolver_is_resolved(struct connectdata *conn, |
| 496 | struct Curl_dns_entry **entry) |
| 497 | { |
| 498 | struct SessionHandle *data = conn->data; |
| 499 | struct thread_data *td = (struct thread_data*) conn->async.os_specific; |
| 500 | int done = 0; |
| 501 | |
| 502 | *entry = NULL; |
| 503 | |
| 504 | if(!td) { |
| 505 | DEBUGASSERT(td); |
| 506 | return CURLE_COULDNT_RESOLVE_HOST; |
| 507 | } |
| 508 | |
| 509 | Curl_mutex_acquire(td->tsd.mtx); |
| 510 | done = td->tsd.done; |
| 511 | Curl_mutex_release(td->tsd.mtx); |
| 512 | |
| 513 | if(done) { |
| 514 | getaddrinfo_complete(conn); |
| 515 | |
| 516 | if(!conn->async.dns) { |
| 517 | CURLcode result = resolver_error(conn); |
| 518 | destroy_async_data(&conn->async); |
| 519 | return result; |
| 520 | } |
| 521 | destroy_async_data(&conn->async); |
| 522 | *entry = conn->async.dns; |
| 523 | } |
| 524 | else { |
| 525 | /* poll for name lookup done with exponential backoff up to 250ms */ |
| 526 | long elapsed = Curl_tvdiff(Curl_tvnow(), data->progress.t_startsingle); |
| 527 | if(elapsed < 0) |
| 528 | elapsed = 0; |
| 529 | |
| 530 | if(td->poll_interval == 0) |
| 531 | /* Start at 1ms poll interval */ |
| 532 | td->poll_interval = 1; |
| 533 | else if(elapsed >= td->interval_end) |
| 534 | /* Back-off exponentially if last interval expired */ |
| 535 | td->poll_interval *= 2; |
| 536 | |
| 537 | if(td->poll_interval > 250) |
| 538 | td->poll_interval = 250; |
| 539 | |
| 540 | td->interval_end = elapsed + td->poll_interval; |
| 541 | Curl_expire(conn->data, td->poll_interval); |
| 542 | } |
| 543 | |
| 544 | return CURLE_OK; |
| 545 | } |
| 546 | |
| 547 | int Curl_resolver_getsock(struct connectdata *conn, |
| 548 | curl_socket_t *socks, |
| 549 | int numsocks) |
| 550 | { |
| 551 | (void)conn; |
| 552 | (void)socks; |
| 553 | (void)numsocks; |
| 554 | return 0; |
| 555 | } |
| 556 | |
| 557 | #ifndef HAVE_GETADDRINFO |
| 558 | /* |
| 559 | * Curl_getaddrinfo() - for platforms without getaddrinfo |
| 560 | */ |
| 561 | Curl_addrinfo *Curl_resolver_getaddrinfo(struct connectdata *conn, |
| 562 | const char *hostname, |
| 563 | int port, |
| 564 | int *waitp) |
| 565 | { |
| 566 | struct in_addr in; |
| 567 | |
| 568 | *waitp = 0; /* default to synchronous response */ |
| 569 | |
| 570 | if(Curl_inet_pton(AF_INET, hostname, &in) > 0) |
| 571 | /* This is a dotted IP address 123.123.123.123-style */ |
| 572 | return Curl_ip2addr(AF_INET, &in, hostname, port); |
| 573 | |
| 574 | /* fire up a new resolver thread! */ |
| 575 | if(init_resolve_thread(conn, hostname, port, NULL)) { |
| 576 | *waitp = 1; /* expect asynchronous response */ |
| 577 | return NULL; |
| 578 | } |
| 579 | |
| 580 | /* fall-back to blocking version */ |
| 581 | return Curl_ipv4_resolve_r(hostname, port); |
| 582 | } |
| 583 | |
| 584 | #else /* !HAVE_GETADDRINFO */ |
| 585 | |
| 586 | /* |
| 587 | * Curl_resolver_getaddrinfo() - for getaddrinfo |
| 588 | */ |
| 589 | Curl_addrinfo *Curl_resolver_getaddrinfo(struct connectdata *conn, |
| 590 | const char *hostname, |
| 591 | int port, |
| 592 | int *waitp) |
| 593 | { |
| 594 | struct addrinfo hints; |
| 595 | struct in_addr in; |
| 596 | Curl_addrinfo *res; |
| 597 | int error; |
| 598 | char sbuf[12]; |
| 599 | int pf = PF_INET; |
| 600 | #ifdef CURLRES_IPV6 |
| 601 | struct in6_addr in6; |
| 602 | #endif /* CURLRES_IPV6 */ |
| 603 | |
| 604 | *waitp = 0; /* default to synchronous response */ |
| 605 | |
| 606 | /* First check if this is an IPv4 address string */ |
| 607 | if(Curl_inet_pton(AF_INET, hostname, &in) > 0) |
| 608 | /* This is a dotted IP address 123.123.123.123-style */ |
| 609 | return Curl_ip2addr(AF_INET, &in, hostname, port); |
| 610 | |
| 611 | #ifdef CURLRES_IPV6 |
| 612 | /* check if this is an IPv6 address string */ |
| 613 | if(Curl_inet_pton (AF_INET6, hostname, &in6) > 0) |
| 614 | /* This is an IPv6 address literal */ |
| 615 | return Curl_ip2addr(AF_INET6, &in6, hostname, port); |
| 616 | |
| 617 | /* |
| 618 | * Check if a limited name resolve has been requested. |
| 619 | */ |
| 620 | switch(conn->ip_version) { |
| 621 | case CURL_IPRESOLVE_V4: |
| 622 | pf = PF_INET; |
| 623 | break; |
| 624 | case CURL_IPRESOLVE_V6: |
| 625 | pf = PF_INET6; |
| 626 | break; |
| 627 | default: |
| 628 | pf = PF_UNSPEC; |
| 629 | break; |
| 630 | } |
| 631 | |
| 632 | if((pf != PF_INET) && !Curl_ipv6works()) |
| 633 | /* The stack seems to be a non-IPv6 one */ |
| 634 | pf = PF_INET; |
| 635 | |
| 636 | #endif /* CURLRES_IPV6 */ |
| 637 | |
| 638 | memset(&hints, 0, sizeof(hints)); |
| 639 | hints.ai_family = pf; |
| 640 | hints.ai_socktype = conn->socktype; |
| 641 | |
| 642 | snprintf(sbuf, sizeof(sbuf), "%d", port); |
| 643 | |
| 644 | /* fire up a new resolver thread! */ |
| 645 | if(init_resolve_thread(conn, hostname, port, &hints)) { |
| 646 | *waitp = 1; /* expect asynchronous response */ |
| 647 | return NULL; |
| 648 | } |
| 649 | |
| 650 | /* fall-back to blocking version */ |
| 651 | infof(conn->data, "init_resolve_thread() failed for %s; %s\n", |
| 652 | hostname, Curl_strerror(conn, ERRNO)); |
| 653 | |
| 654 | error = Curl_getaddrinfo_ex(hostname, sbuf, &hints, &res); |
| 655 | if(error) { |
| 656 | infof(conn->data, "getaddrinfo() failed for %s:%d; %s\n", |
| 657 | hostname, port, Curl_strerror(conn, SOCKERRNO)); |
| 658 | return NULL; |
| 659 | } |
| 660 | return res; |
| 661 | } |
| 662 | |
| 663 | #endif /* !HAVE_GETADDRINFO */ |
| 664 | |
| 665 | CURLcode Curl_set_dns_servers(struct SessionHandle *data, |
| 666 | char *servers) |
| 667 | { |
| 668 | (void)data; |
| 669 | (void)servers; |
| 670 | return CURLE_NOT_BUILT_IN; |
| 671 | |
| 672 | } |
| 673 | |
| 674 | CURLcode Curl_set_dns_interface(struct SessionHandle *data, |
| 675 | const char *interf) |
| 676 | { |
| 677 | (void)data; |
| 678 | (void)interf; |
| 679 | return CURLE_NOT_BUILT_IN; |
| 680 | } |
| 681 | |
| 682 | CURLcode Curl_set_dns_local_ip4(struct SessionHandle *data, |
| 683 | const char *local_ip4) |
| 684 | { |
| 685 | (void)data; |
| 686 | (void)local_ip4; |
| 687 | return CURLE_NOT_BUILT_IN; |
| 688 | } |
| 689 | |
| 690 | CURLcode Curl_set_dns_local_ip6(struct SessionHandle *data, |
| 691 | const char *local_ip6) |
| 692 | { |
| 693 | (void)data; |
| 694 | (void)local_ip6; |
| 695 | return CURLE_NOT_BUILT_IN; |
| 696 | } |
| 697 | |
| 698 | #endif /* CURLRES_THREADED */ |