| 1 | /* |
| 2 | * Copyright (c) 2001, 02 Motoyuki Kasahara |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * 1. Redistributions of source code must retain the above copyright |
| 8 | * notice, this list of conditions and the following disclaimer. |
| 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer in the |
| 11 | * documentation and/or other materials provided with the distribution. |
| 12 | * 3. Neither the name of the project nor the names of its contributors |
| 13 | * may be used to endorse or promote products derived from this software |
| 14 | * without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| 17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| 20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | /* |
| 30 | * This program provides getaddrinfo() and getnameinfo() described in |
| 31 | * RFC2133, 2553 and 3493. These functions are mainly used for IPv6 |
| 32 | * application to resolve hostname or address. |
| 33 | * |
| 34 | * This program is designed to be working on traditional IPv4 systems |
| 35 | * which don't have those functions. Therefore, this implementation |
| 36 | * supports IPv4 only. |
| 37 | * |
| 38 | * This program is useful for application which should support both IPv6 |
| 39 | * and traditional IPv4 systems. Use genuine getaddrinfo() and getnameinfo() |
| 40 | * provided by system if the system supports IPv6. Otherwise, use this |
| 41 | * implementation. |
| 42 | * |
| 43 | * This program is intended to be used in combination with GNU Autoconf. |
| 44 | * |
| 45 | * This program also provides freeaddrinfo() and gai_strerror(). |
| 46 | * |
| 47 | * To use this program in your application, insert the following lines to |
| 48 | * C source files after including `sys/types.h', `sys/socket.h' and |
| 49 | * `netdb.h'. `getaddrinfo.h' defines `struct addrinfo' and AI_, NI_, |
| 50 | * EAI_ macros. |
| 51 | * |
| 52 | * #ifndef HAVE_GETADDRINFO |
| 53 | * #include "getaddrinfo.h" |
| 54 | * #endif |
| 55 | * |
| 56 | * Restriction: |
| 57 | * getaddrinfo() and getnameinfo() of this program are NOT thread |
| 58 | * safe, unless the cpp macro ENABLE_PTHREAD is defined. |
| 59 | */ |
| 60 | |
| 61 | /* |
| 62 | * Add the following code to your configure.ac (or configure.in). |
| 63 | * AC_C_CONST |
| 64 | * AC_HEADER_STDC |
| 65 | * AC_CHECK_HEADERS(string.h memory.h stdlib.h) |
| 66 | * AC_CHECK_FUNCS(memcpy) |
| 67 | * AC_REPLACE_FUNCS(memset) |
| 68 | * AC_TYPE_SOCKLEN_T |
| 69 | * AC_TYPE_IN_PORT_T |
| 70 | * AC_DECL_H_ERRNO |
| 71 | * |
| 72 | * AC_CHECK_FUNCS(getaddrinfo getnameinfo) |
| 73 | * if test "$ac_cv_func_getaddrinfo$ac_cv_func_getnameinfo" != yesyes ; then |
| 74 | * LIBOBJS="$LIBOBJS getaddrinfo.$ac_objext" |
| 75 | * fi |
| 76 | */ |
| 77 | |
| 78 | #ifdef HAVE_CONFIG_H |
| 79 | #include "config.h" |
| 80 | #endif |
| 81 | |
| 82 | #include <sys/types.h> |
| 83 | #include <stdio.h> |
| 84 | #include <sys/socket.h> |
| 85 | #include <netinet/in.h> |
| 86 | #include <arpa/inet.h> |
| 87 | #include <netdb.h> |
| 88 | |
| 89 | #if defined(STDC_HEADERS) || defined(HAVE_STRING_H) |
| 90 | #include <string.h> |
| 91 | #if !defined(STDC_HEADERS) && defined(HAVE_MEMORY_H) |
| 92 | #include <memory.h> |
| 93 | #endif /* not STDC_HEADERS and HAVE_MEMORY_H */ |
| 94 | #else /* not STDC_HEADERS and not HAVE_STRING_H */ |
| 95 | #include <strings.h> |
| 96 | #endif /* not STDC_HEADERS and not HAVE_STRING_H */ |
| 97 | |
| 98 | #ifdef HAVE_STDLIB_H |
| 99 | #include <stdlib.h> |
| 100 | #endif |
| 101 | |
| 102 | #ifdef ENABLE_PTHREAD |
| 103 | #include <pthread.h> |
| 104 | #endif |
| 105 | |
| 106 | #ifdef ENABLE_NLS |
| 107 | #include <libintl.h> |
| 108 | #endif |
| 109 | |
| 110 | #ifndef HAVE_MEMCPY |
| 111 | #define memcpy(d, s, n) bcopy((s), (d), (n)) |
| 112 | #ifdef __STDC__ |
| 113 | void *memchr(const void *, int, size_t); |
| 114 | int memcmp(const void *, const void *, size_t); |
| 115 | void *memmove(void *, const void *, size_t); |
| 116 | void *memset(void *, int, size_t); |
| 117 | #else /* not __STDC__ */ |
| 118 | char *memchr(); |
| 119 | int memcmp(); |
| 120 | char *memmove(); |
| 121 | char *memset(); |
| 122 | #endif /* not __STDC__ */ |
| 123 | #endif /* not HAVE_MEMCPY */ |
| 124 | |
| 125 | #ifndef H_ERRNO_DECLARED |
| 126 | extern int h_errno; |
| 127 | #endif |
| 128 | |
| 129 | #include "getaddrinfo.h" |
| 130 | |
| 131 | #ifdef ENABLE_NLS |
| 132 | #define _(string) gettext(string) |
| 133 | #ifdef gettext_noop |
| 134 | #define N_(string) gettext_noop(string) |
| 135 | #else |
| 136 | #define N_(string) (string) |
| 137 | #endif |
| 138 | #else |
| 139 | #define gettext(string) (string) |
| 140 | #define _(string) (string) |
| 141 | #define N_(string) (string) |
| 142 | #endif |
| 143 | |
| 144 | /* |
| 145 | * Error messages for gai_strerror(). |
| 146 | */ |
| 147 | static char *eai_errlist[] = { |
| 148 | N_("Success"), |
| 149 | |
| 150 | /* EAI_ADDRFAMILY */ |
| 151 | N_("Address family for hostname not supported"), |
| 152 | |
| 153 | /* EAI_AGAIN */ |
| 154 | N_("Temporary failure in name resolution"), |
| 155 | |
| 156 | /* EAI_BADFLAGS */ |
| 157 | N_("Invalid value for ai_flags"), |
| 158 | |
| 159 | /* EAI_FAIL */ |
| 160 | N_("Non-recoverable failure in name resolution"), |
| 161 | |
| 162 | /* EAI_FAMILY */ |
| 163 | N_("ai_family not supported"), |
| 164 | |
| 165 | /* EAI_MEMORY */ |
| 166 | N_("Memory allocation failure"), |
| 167 | |
| 168 | /* EAI_NONAME */ |
| 169 | N_("hostname nor servname provided, or not known"), |
| 170 | |
| 171 | /* EAI_OVERFLOW */ |
| 172 | N_("An argument buffer overflowed"), |
| 173 | |
| 174 | /* EAI_SERVICE */ |
| 175 | N_("servname not supported for ai_socktype"), |
| 176 | |
| 177 | /* EAI_SOCKTYPE */ |
| 178 | N_("ai_socktype not supported"), |
| 179 | |
| 180 | /* EAI_SYSTEM */ |
| 181 | N_("System error returned in errno") |
| 182 | }; |
| 183 | |
| 184 | /* |
| 185 | * Default hints for getaddrinfo(). |
| 186 | */ |
| 187 | static struct addrinfo default_hints = { |
| 188 | 0, PF_UNSPEC, 0, 0, 0, NULL, NULL, NULL |
| 189 | }; |
| 190 | |
| 191 | /* |
| 192 | * Mutex. |
| 193 | */ |
| 194 | #ifdef ENABLE_PTHREAD |
| 195 | static pthread_mutex_t gai_mutex = PTHREAD_MUTEX_INITIALIZER; |
| 196 | #endif |
| 197 | |
| 198 | /* |
| 199 | * Declaration of static functions. |
| 200 | */ |
| 201 | #ifdef __STDC__ |
| 202 | static int is_integer(const char *); |
| 203 | static int is_address(const char *); |
| 204 | static int itoa_length(int); |
| 205 | #else |
| 206 | static int is_integer(); |
| 207 | static int is_address(); |
| 208 | static int itoa_length(); |
| 209 | #endif |
| 210 | |
| 211 | /* |
| 212 | * gai_strerror(). |
| 213 | */ |
| 214 | const char * |
| 215 | gai_strerror(ecode) |
| 216 | int ecode; |
| 217 | { |
| 218 | if (ecode < 0 || ecode > EAI_SYSTEM) |
| 219 | return _("Unknown error"); |
| 220 | |
| 221 | return gettext(eai_errlist[ecode]); |
| 222 | } |
| 223 | |
| 224 | /* |
| 225 | * freeaddrinfo(). |
| 226 | */ |
| 227 | void |
| 228 | freeaddrinfo(ai) |
| 229 | struct addrinfo *ai; |
| 230 | { |
| 231 | struct addrinfo *next_ai; |
| 232 | |
| 233 | while (ai != NULL) { |
| 234 | if (ai->ai_canonname != NULL) |
| 235 | free(ai->ai_canonname); |
| 236 | if (ai->ai_addr != NULL) |
| 237 | free(ai->ai_addr); |
| 238 | next_ai = ai->ai_next; |
| 239 | free(ai); |
| 240 | ai = next_ai; |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * Return 1 if the string `s' represents an integer. |
| 246 | */ |
| 247 | static int |
| 248 | is_integer(s) |
| 249 | const char *s; |
| 250 | { |
| 251 | if (*s == '-' || *s == '+') |
| 252 | s++; |
| 253 | if (*s < '0' || '9' < *s) |
| 254 | return 0; |
| 255 | |
| 256 | s++; |
| 257 | while ('0' <= *s && *s <= '9') |
| 258 | s++; |
| 259 | |
| 260 | return (*s == '\0'); |
| 261 | } |
| 262 | |
| 263 | /* |
| 264 | * Return 1 if the string `s' represents an IPv4 address. |
| 265 | * Unlike inet_addr(), it doesn't permit malformed nortation such |
| 266 | * as "192.168". |
| 267 | */ |
| 268 | static int |
| 269 | is_address(s) |
| 270 | const char *s; |
| 271 | { |
| 272 | const static char delimiters[] = {'.', '.', '.', '\0'}; |
| 273 | int i, j; |
| 274 | int octet; |
| 275 | |
| 276 | for (i = 0; i < 4; i++) { |
| 277 | if (*s == '0' && *(s + 1) != delimiters[i]) |
| 278 | return 0; |
| 279 | for (j = 0, octet = 0; '0' <= *s && *s <= '9' && j < 3; s++, j++) |
| 280 | octet = octet * 10 + (*s - '0'); |
| 281 | if (j == 0 || octet > 255 || *s != delimiters[i]) |
| 282 | return 0; |
| 283 | s++; |
| 284 | } |
| 285 | |
| 286 | return 1; |
| 287 | } |
| 288 | |
| 289 | /* |
| 290 | * Calcurate length of the string `s', where `s' is set by |
| 291 | * sprintf(s, "%d", n). |
| 292 | */ |
| 293 | static int |
| 294 | itoa_length(n) |
| 295 | int n; |
| 296 | { |
| 297 | int result = 1; |
| 298 | |
| 299 | if (n < 0) { |
| 300 | n = -n; |
| 301 | result++; |
| 302 | } |
| 303 | |
| 304 | while (n >= 10) { |
| 305 | result++; |
| 306 | n /= 10; |
| 307 | } |
| 308 | |
| 309 | return result; |
| 310 | } |
| 311 | |
| 312 | /* |
| 313 | * getaddrinfo(). |
| 314 | */ |
| 315 | int |
| 316 | getaddrinfo(nodename, servname, hints, res) |
| 317 | const char *nodename; |
| 318 | const char *servname; |
| 319 | const struct addrinfo *hints; |
| 320 | struct addrinfo **res; |
| 321 | { |
| 322 | struct addrinfo *head_res = NULL; |
| 323 | struct addrinfo *tail_res = NULL; |
| 324 | struct addrinfo *new_res; |
| 325 | struct sockaddr_in *sa_in; |
| 326 | struct in_addr **addr_list; |
| 327 | struct in_addr *addr_list_buf[2]; |
| 328 | struct in_addr addr_buf; |
| 329 | struct in_addr **ap; |
| 330 | struct servent *servent; |
| 331 | struct hostent *hostent; |
| 332 | const char *canonname = NULL; |
| 333 | in_port_t port; |
| 334 | int saved_h_errno; |
| 335 | int result = 0; |
| 336 | |
| 337 | #ifdef ENABLE_PTHREAD |
| 338 | pthread_mutex_lock(&gai_mutex); |
| 339 | #endif |
| 340 | |
| 341 | saved_h_errno = h_errno; |
| 342 | |
| 343 | if (nodename == NULL && servname == NULL) { |
| 344 | result = EAI_NONAME; |
| 345 | goto end; |
| 346 | } |
| 347 | |
| 348 | if (hints != NULL) { |
| 349 | if (hints->ai_family != PF_INET && hints->ai_family != PF_UNSPEC) { |
| 350 | result = EAI_FAMILY; |
| 351 | goto end; |
| 352 | } |
| 353 | if (hints->ai_socktype != SOCK_DGRAM |
| 354 | && hints->ai_socktype != SOCK_STREAM |
| 355 | && hints->ai_socktype != 0) { |
| 356 | result = EAI_SOCKTYPE; |
| 357 | goto end; |
| 358 | } |
| 359 | } else { |
| 360 | hints = &default_hints; |
| 361 | } |
| 362 | |
| 363 | if (servname != NULL) { |
| 364 | if (is_integer(servname)) |
| 365 | port = htons(atoi(servname)); |
| 366 | else { |
| 367 | if (hints->ai_flags & AI_NUMERICSERV) { |
| 368 | result = EAI_NONAME; |
| 369 | goto end; |
| 370 | } |
| 371 | |
| 372 | if (hints->ai_socktype == SOCK_DGRAM) |
| 373 | servent = getservbyname(servname, "udp"); |
| 374 | else if (hints->ai_socktype == SOCK_STREAM) |
| 375 | servent = getservbyname(servname, "tcp"); |
| 376 | else if (hints->ai_socktype == 0) |
| 377 | servent = getservbyname(servname, "tcp"); |
| 378 | else { |
| 379 | result = EAI_SOCKTYPE; |
| 380 | goto end; |
| 381 | } |
| 382 | |
| 383 | if (servent == NULL) { |
| 384 | result = EAI_SERVICE; |
| 385 | goto end; |
| 386 | } |
| 387 | port = servent->s_port; |
| 388 | } |
| 389 | } else { |
| 390 | port = htons(0); |
| 391 | } |
| 392 | |
| 393 | if (nodename != NULL) { |
| 394 | if (is_address(nodename)) { |
| 395 | addr_buf.s_addr = inet_addr(nodename); |
| 396 | addr_list_buf[0] = &addr_buf; |
| 397 | addr_list_buf[1] = NULL; |
| 398 | addr_list = addr_list_buf; |
| 399 | |
| 400 | if (hints->ai_flags & AI_CANONNAME |
| 401 | && !(hints->ai_flags & AI_NUMERICHOST)) { |
| 402 | hostent = gethostbyaddr((char *)&addr_buf, |
| 403 | sizeof(struct in_addr), AF_INET); |
| 404 | if (hostent != NULL) |
| 405 | canonname = hostent->h_name; |
| 406 | else |
| 407 | canonname = nodename; |
| 408 | } |
| 409 | } else { |
| 410 | if (hints->ai_flags & AI_NUMERICHOST) { |
| 411 | result = EAI_NONAME; |
| 412 | goto end; |
| 413 | } |
| 414 | |
| 415 | hostent = gethostbyname(nodename); |
| 416 | if (hostent == NULL) { |
| 417 | switch (h_errno) { |
| 418 | case HOST_NOT_FOUND: |
| 419 | case NO_DATA: |
| 420 | result = EAI_NONAME; |
| 421 | goto end; |
| 422 | case TRY_AGAIN: |
| 423 | result = EAI_AGAIN; |
| 424 | goto end; |
| 425 | default: |
| 426 | result = EAI_FAIL; |
| 427 | goto end; |
| 428 | } |
| 429 | } |
| 430 | addr_list = (struct in_addr **)hostent->h_addr_list; |
| 431 | |
| 432 | if (hints->ai_flags & AI_CANONNAME) |
| 433 | canonname = hostent->h_name; |
| 434 | } |
| 435 | } else { |
| 436 | if (hints->ai_flags & AI_PASSIVE) |
| 437 | addr_buf.s_addr = htonl(INADDR_ANY); |
| 438 | else |
| 439 | addr_buf.s_addr = htonl(0x7F000001); |
| 440 | addr_list_buf[0] = &addr_buf; |
| 441 | addr_list_buf[1] = NULL; |
| 442 | addr_list = addr_list_buf; |
| 443 | } |
| 444 | |
| 445 | for (ap = addr_list; *ap != NULL; ap++) { |
| 446 | new_res = (struct addrinfo *)malloc(sizeof(struct addrinfo)); |
| 447 | if (new_res == NULL) { |
| 448 | if (head_res != NULL) |
| 449 | freeaddrinfo(head_res); |
| 450 | result = EAI_MEMORY; |
| 451 | goto end; |
| 452 | } |
| 453 | |
| 454 | new_res->ai_family = PF_INET; |
| 455 | new_res->ai_socktype = hints->ai_socktype; |
| 456 | new_res->ai_protocol = hints->ai_protocol; |
| 457 | new_res->ai_addr = NULL; |
| 458 | new_res->ai_addrlen = sizeof(struct sockaddr_in); |
| 459 | new_res->ai_canonname = NULL; |
| 460 | new_res->ai_next = NULL; |
| 461 | |
| 462 | new_res->ai_addr = (struct sockaddr *) |
| 463 | malloc(sizeof(struct sockaddr_in)); |
| 464 | if (new_res->ai_addr == NULL) { |
| 465 | free(new_res); |
| 466 | if (head_res != NULL) |
| 467 | freeaddrinfo(head_res); |
| 468 | result = EAI_MEMORY; |
| 469 | goto end; |
| 470 | } |
| 471 | |
| 472 | sa_in = (struct sockaddr_in *)new_res->ai_addr; |
| 473 | memset(sa_in, 0, sizeof(struct sockaddr_in)); |
| 474 | sa_in->sin_family = PF_INET; |
| 475 | sa_in->sin_port = port; |
| 476 | memcpy(&sa_in->sin_addr, *ap, sizeof(struct in_addr)); |
| 477 | |
| 478 | if (head_res == NULL) |
| 479 | head_res = new_res; |
| 480 | else |
| 481 | tail_res->ai_next = new_res; |
| 482 | tail_res = new_res; |
| 483 | } |
| 484 | |
| 485 | if (canonname != NULL && head_res != NULL) { |
| 486 | head_res->ai_canonname = (char *)malloc(strlen(canonname) + 1); |
| 487 | if (head_res->ai_canonname != NULL) |
| 488 | strcpy(head_res->ai_canonname, canonname); |
| 489 | } |
| 490 | |
| 491 | *res = head_res; |
| 492 | |
| 493 | end: |
| 494 | h_errno = saved_h_errno; |
| 495 | #ifdef ENABLE_PTHREAD |
| 496 | pthread_mutex_unlock(&gai_mutex); |
| 497 | #endif |
| 498 | return result; |
| 499 | } |
| 500 | |
| 501 | /* |
| 502 | * getnameinfo(). |
| 503 | */ |
| 504 | int |
| 505 | getnameinfo(sa, salen, node, nodelen, serv, servlen, flags) |
| 506 | const struct sockaddr *sa; |
| 507 | socklen_t salen; |
| 508 | char *node; |
| 509 | socklen_t nodelen; |
| 510 | char *serv; |
| 511 | socklen_t servlen; |
| 512 | int flags; |
| 513 | { |
| 514 | const struct sockaddr_in *sa_in = (const struct sockaddr_in *)sa; |
| 515 | struct hostent *hostent; |
| 516 | struct servent *servent; |
| 517 | char *ntoa_address; |
| 518 | int saved_h_errno; |
| 519 | int result = 0; |
| 520 | |
| 521 | #ifdef ENABLE_PTHREAD |
| 522 | pthread_mutex_lock(&gai_mutex); |
| 523 | #endif |
| 524 | |
| 525 | saved_h_errno = h_errno; |
| 526 | |
| 527 | if (sa_in->sin_family != PF_INET) { |
| 528 | result = EAI_FAMILY; |
| 529 | goto end; |
| 530 | } else if (node == NULL && serv == NULL) { |
| 531 | result = EAI_NONAME; |
| 532 | goto end; |
| 533 | } |
| 534 | |
| 535 | if (serv != NULL && servlen > 0) { |
| 536 | if (flags & NI_NUMERICSERV) |
| 537 | servent = NULL; |
| 538 | else if (flags & NI_DGRAM) |
| 539 | servent = getservbyport(sa_in->sin_port, "udp"); |
| 540 | else |
| 541 | servent = getservbyport(sa_in->sin_port, "tcp"); |
| 542 | |
| 543 | if (servent != NULL) { |
| 544 | if (servlen <= strlen(servent->s_name)) { |
| 545 | result = EAI_OVERFLOW; |
| 546 | goto end; |
| 547 | } |
| 548 | strcpy(serv, servent->s_name); |
| 549 | } else { |
| 550 | if (servlen <= itoa_length(ntohs(sa_in->sin_port))) { |
| 551 | result = EAI_OVERFLOW; |
| 552 | goto end; |
| 553 | } |
| 554 | sprintf(serv, "%d", ntohs(sa_in->sin_port)); |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | if (node != NULL && nodelen > 0) { |
| 559 | if (flags & NI_NUMERICHOST) |
| 560 | hostent = NULL; |
| 561 | else { |
| 562 | hostent = gethostbyaddr((char *)&sa_in->sin_addr, |
| 563 | sizeof(struct in_addr), AF_INET); |
| 564 | } |
| 565 | if (hostent != NULL) { |
| 566 | if (nodelen <= strlen(hostent->h_name)) { |
| 567 | result = EAI_OVERFLOW; |
| 568 | goto end; |
| 569 | } |
| 570 | strcpy(node, hostent->h_name); |
| 571 | } else { |
| 572 | if (flags & NI_NAMEREQD) { |
| 573 | result = EAI_NONAME; |
| 574 | goto end; |
| 575 | } |
| 576 | ntoa_address = inet_ntoa(sa_in->sin_addr); |
| 577 | if (nodelen <= strlen(ntoa_address)) { |
| 578 | result = EAI_OVERFLOW; |
| 579 | goto end; |
| 580 | } |
| 581 | strcpy(node, ntoa_address); |
| 582 | } |
| 583 | |
| 584 | } |
| 585 | |
| 586 | end: |
| 587 | h_errno = saved_h_errno; |
| 588 | #ifdef ENABLE_PTHREAD |
| 589 | pthread_mutex_unlock(&gai_mutex); |
| 590 | #endif |
| 591 | return result; |
| 592 | } |
| 593 | |