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Commit | Line | Data |
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ef416fc2 | 1 | /* |
da003234 | 2 | * HTTP address list routines for CUPS. |
ef416fc2 | 3 | * |
6fb588e0 | 4 | * Copyright 2007-2016 by Apple Inc. |
da003234 | 5 | * Copyright 1997-2007 by Easy Software Products, all rights reserved. |
ef416fc2 | 6 | * |
da003234 MS |
7 | * These coded instructions, statements, and computer programs are the |
8 | * property of Apple Inc. and are protected by Federal copyright | |
9 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
10 | * which should have been included with this file. If this file is | |
11 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
6539a0af MS |
12 | * |
13 | * This file is subject to the Apple OS-Developed Software exception. | |
ef416fc2 | 14 | */ |
15 | ||
16 | /* | |
17 | * Include necessary headers... | |
18 | */ | |
19 | ||
71e16022 | 20 | #include "cups-private.h" |
49d87452 MS |
21 | #ifdef HAVE_RESOLV_H |
22 | # include <resolv.h> | |
23 | #endif /* HAVE_RESOLV_H */ | |
dcb445bc MS |
24 | #ifdef HAVE_POLL |
25 | # include <poll.h> | |
26 | #endif /* HAVE_POLL */ | |
82cc1f9a | 27 | #ifndef WIN32 |
6961465f | 28 | # include <fcntl.h> |
82cc1f9a | 29 | #endif /* WIN32 */ |
ef416fc2 | 30 | |
31 | ||
32 | /* | |
33 | * 'httpAddrConnect()' - Connect to any of the addresses in the list. | |
34 | * | |
8072030b | 35 | * @since CUPS 1.2/macOS 10.5@ |
ef416fc2 | 36 | */ |
37 | ||
38 | http_addrlist_t * /* O - Connected address or NULL on failure */ | |
39 | httpAddrConnect( | |
40 | http_addrlist_t *addrlist, /* I - List of potential addresses */ | |
41 | int *sock) /* O - Socket */ | |
dcb445bc | 42 | { |
807315e6 | 43 | DEBUG_printf(("httpAddrConnect(addrlist=%p, sock=%p)", (void *)addrlist, (void *)sock)); |
dcb445bc MS |
44 | |
45 | return (httpAddrConnect2(addrlist, sock, 30000, NULL)); | |
46 | } | |
47 | ||
48 | ||
49 | /* | |
50 | * 'httpAddrConnect2()' - Connect to any of the addresses in the list with a | |
51 | * timeout and optional cancel. | |
52 | * | |
8072030b | 53 | * @since CUPS 1.7/macOS 10.9@ |
dcb445bc MS |
54 | */ |
55 | ||
56 | http_addrlist_t * /* O - Connected address or NULL on failure */ | |
57 | httpAddrConnect2( | |
58 | http_addrlist_t *addrlist, /* I - List of potential addresses */ | |
59 | int *sock, /* O - Socket */ | |
60 | int msec, /* I - Timeout in milliseconds */ | |
61 | int *cancel) /* I - Pointer to "cancel" variable */ | |
ef416fc2 | 62 | { |
10d09e33 | 63 | int val; /* Socket option value */ |
21aa3f37 MS |
64 | #ifndef WIN32 |
65 | int flags; /* Socket flags */ | |
66 | #endif /* !WIN32 */ | |
67 | int remaining; /* Remaining timeout */ | |
d5cc05c9 MS |
68 | int i, /* Looping var */ |
69 | nfds, /* Number of file descriptors */ | |
70 | fds[100], /* Socket file descriptors */ | |
71 | result; /* Result from select() or poll() */ | |
72 | http_addrlist_t *addrs[100]; /* Addresses */ | |
21aa3f37 MS |
73 | #ifndef HAVE_POLL |
74 | int max_fd = -1; /* Highest file descriptor */ | |
75 | #endif /* !HAVE_POLL */ | |
76 | #ifdef O_NONBLOCK | |
12f89d24 | 77 | # ifdef HAVE_POLL |
d5cc05c9 | 78 | struct pollfd pfds[100]; /* Polled file descriptors */ |
12f89d24 | 79 | # else |
dcb445bc | 80 | fd_set input_set, /* select() input set */ |
4c3f8a9b MS |
81 | output_set, /* select() output set */ |
82 | error_set; /* select() error set */ | |
dcb445bc | 83 | struct timeval timeout; /* Timeout */ |
12f89d24 | 84 | # endif /* HAVE_POLL */ |
12f89d24 | 85 | #endif /* O_NONBLOCK */ |
1ff0402e | 86 | #ifdef DEBUG |
6fb588e0 MS |
87 | socklen_t len; /* Length of value */ |
88 | http_addr_t peer; /* Peer address */ | |
10d09e33 | 89 | char temp[256]; /* Temporary address string */ |
1ff0402e | 90 | #endif /* DEBUG */ |
ef416fc2 | 91 | |
92 | ||
807315e6 | 93 | DEBUG_printf(("httpAddrConnect2(addrlist=%p, sock=%p, msec=%d, cancel=%p)", (void *)addrlist, (void *)sock, msec, (void *)cancel)); |
1ff0402e MS |
94 | |
95 | if (!sock) | |
96 | { | |
97 | errno = EINVAL; | |
cb7f98ee | 98 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
1ff0402e MS |
99 | return (NULL); |
100 | } | |
101 | ||
dcb445bc MS |
102 | if (cancel && *cancel) |
103 | return (NULL); | |
104 | ||
d5cc05c9 | 105 | if (msec <= 0) |
dcb445bc MS |
106 | msec = INT_MAX; |
107 | ||
ef416fc2 | 108 | /* |
109 | * Loop through each address until we connect or run out of addresses... | |
110 | */ | |
111 | ||
6fb588e0 MS |
112 | nfds = 0; |
113 | remaining = msec; | |
114 | ||
115 | while (remaining > 0) | |
ef416fc2 | 116 | { |
12f89d24 | 117 | if (cancel && *cancel) |
d5cc05c9 MS |
118 | { |
119 | while (nfds > 0) | |
120 | { | |
121 | nfds --; | |
122 | httpAddrClose(NULL, fds[nfds]); | |
123 | } | |
124 | ||
12f89d24 | 125 | return (NULL); |
d5cc05c9 | 126 | } |
12f89d24 | 127 | |
6fb588e0 | 128 | if (addrlist && nfds < (int)(sizeof(fds) / sizeof(fds[0]))) |
ef416fc2 | 129 | { |
130 | /* | |
6fb588e0 | 131 | * Create the socket... |
ef416fc2 | 132 | */ |
133 | ||
6fb588e0 | 134 | DEBUG_printf(("2httpAddrConnect2: Trying %s:%d...", httpAddrString(&(addrlist->addr), temp, sizeof(temp)), httpAddrPort(&(addrlist->addr)))); |
ef416fc2 | 135 | |
6fb588e0 MS |
136 | if ((fds[nfds] = (int)socket(httpAddrFamily(&(addrlist->addr)), SOCK_STREAM, 0)) < 0) |
137 | { | |
138 | /* | |
139 | * Don't abort yet, as this could just be an issue with the local | |
34016d2a MS |
140 | * system not being configured with IPv4/IPv6/domain socket enabled. |
141 | * | |
142 | * Just skip this address... | |
6fb588e0 | 143 | */ |
ef416fc2 | 144 | |
34016d2a | 145 | addrlist = addrlist->next; |
6fb588e0 MS |
146 | continue; |
147 | } | |
148 | ||
149 | /* | |
150 | * Set options... | |
151 | */ | |
152 | ||
153 | val = 1; | |
154 | setsockopt(fds[nfds], SOL_SOCKET, SO_REUSEADDR, CUPS_SOCAST &val, sizeof(val)); | |
ef416fc2 | 155 | |
156 | #ifdef SO_REUSEPORT | |
6fb588e0 MS |
157 | val = 1; |
158 | setsockopt(fds[nfds], SOL_SOCKET, SO_REUSEPORT, CUPS_SOCAST &val, sizeof(val)); | |
ef416fc2 | 159 | #endif /* SO_REUSEPORT */ |
160 | ||
fa73b229 | 161 | #ifdef SO_NOSIGPIPE |
6fb588e0 MS |
162 | val = 1; |
163 | setsockopt(fds[nfds], SOL_SOCKET, SO_NOSIGPIPE, CUPS_SOCAST &val, sizeof(val)); | |
fa73b229 | 164 | #endif /* SO_NOSIGPIPE */ |
165 | ||
6fb588e0 MS |
166 | /* |
167 | * Using TCP_NODELAY improves responsiveness, especially on systems | |
168 | * with a slow loopback interface... | |
169 | */ | |
ef416fc2 | 170 | |
6fb588e0 MS |
171 | val = 1; |
172 | setsockopt(fds[nfds], IPPROTO_TCP, TCP_NODELAY, CUPS_SOCAST &val, sizeof(val)); | |
ef416fc2 | 173 | |
174 | #ifdef FD_CLOEXEC | |
6fb588e0 MS |
175 | /* |
176 | * Close this socket when starting another process... | |
177 | */ | |
ef416fc2 | 178 | |
6fb588e0 | 179 | fcntl(fds[nfds], F_SETFD, FD_CLOEXEC); |
ef416fc2 | 180 | #endif /* FD_CLOEXEC */ |
181 | ||
dcb445bc | 182 | #ifdef O_NONBLOCK |
6fb588e0 MS |
183 | /* |
184 | * Do an asynchronous connect by setting the socket non-blocking... | |
185 | */ | |
dcb445bc | 186 | |
6fb588e0 | 187 | DEBUG_printf(("httpAddrConnect2: Setting non-blocking connect()")); |
bb0d23b2 | 188 | |
6fb588e0 MS |
189 | flags = fcntl(fds[nfds], F_GETFL, 0); |
190 | fcntl(fds[nfds], F_SETFL, flags | O_NONBLOCK); | |
dcb445bc MS |
191 | #endif /* O_NONBLOCK */ |
192 | ||
6fb588e0 MS |
193 | /* |
194 | * Then connect... | |
195 | */ | |
ef416fc2 | 196 | |
6fb588e0 MS |
197 | if (!connect(fds[nfds], &(addrlist->addr.addr), (socklen_t)httpAddrLength(&(addrlist->addr)))) |
198 | { | |
199 | DEBUG_printf(("1httpAddrConnect2: Connected to %s:%d...", httpAddrString(&(addrlist->addr), temp, sizeof(temp)), httpAddrPort(&(addrlist->addr)))); | |
dcb445bc MS |
200 | |
201 | #ifdef O_NONBLOCK | |
6fb588e0 | 202 | fcntl(fds[nfds], F_SETFL, flags); |
dcb445bc MS |
203 | #endif /* O_NONBLOCK */ |
204 | ||
6fb588e0 | 205 | *sock = fds[nfds]; |
d5cc05c9 | 206 | |
6fb588e0 MS |
207 | while (nfds > 0) |
208 | { | |
209 | nfds --; | |
210 | httpAddrClose(NULL, fds[nfds]); | |
211 | } | |
d5cc05c9 | 212 | |
6fb588e0 MS |
213 | return (addrlist); |
214 | } | |
dcb445bc | 215 | |
d5cc05c9 | 216 | #ifdef WIN32 |
6fb588e0 | 217 | if (WSAGetLastError() != WSAEINPROGRESS && WSAGetLastError() != WSAEWOULDBLOCK) |
d5cc05c9 | 218 | #else |
6fb588e0 | 219 | if (errno != EINPROGRESS && errno != EWOULDBLOCK) |
d5cc05c9 | 220 | #endif /* WIN32 */ |
6fb588e0 MS |
221 | { |
222 | DEBUG_printf(("1httpAddrConnect2: Unable to connect to %s:%d: %s", httpAddrString(&(addrlist->addr), temp, sizeof(temp)), httpAddrPort(&(addrlist->addr)), strerror(errno))); | |
223 | httpAddrClose(NULL, fds[nfds]); | |
34016d2a | 224 | addrlist = addrlist->next; |
6fb588e0 MS |
225 | continue; |
226 | } | |
dcb445bc | 227 | |
21aa3f37 | 228 | #ifndef WIN32 |
6fb588e0 | 229 | fcntl(fds[nfds], F_SETFL, flags); |
21aa3f37 | 230 | #endif /* !WIN32 */ |
dcb445bc | 231 | |
d5cc05c9 | 232 | #ifndef HAVE_POLL |
6fb588e0 MS |
233 | if (fds[nfds] > max_fd) |
234 | max_fd = fds[nfds]; | |
d5cc05c9 MS |
235 | #endif /* !HAVE_POLL */ |
236 | ||
6fb588e0 MS |
237 | addrs[nfds] = addrlist; |
238 | nfds ++; | |
239 | addrlist = addrlist->next; | |
240 | } | |
241 | ||
e8916f41 MS |
242 | if (!addrlist && nfds == 0) |
243 | break; | |
244 | ||
6fb588e0 MS |
245 | /* |
246 | * See if we can connect to any of the addresses so far... | |
247 | */ | |
d5cc05c9 MS |
248 | |
249 | #ifdef O_NONBLOCK | |
6fb588e0 | 250 | DEBUG_puts("1httpAddrConnect2: Finishing async connect()"); |
d5cc05c9 | 251 | |
d5cc05c9 MS |
252 | do |
253 | { | |
254 | if (cancel && *cancel) | |
12f89d24 | 255 | { |
d5cc05c9 MS |
256 | /* |
257 | * Close this socket and return... | |
258 | */ | |
dcb445bc | 259 | |
d5cc05c9 | 260 | DEBUG_puts("1httpAddrConnect2: Canceled connect()"); |
12f89d24 | 261 | |
d5cc05c9 MS |
262 | while (nfds > 0) |
263 | { | |
264 | nfds --; | |
265 | httpAddrClose(NULL, fds[nfds]); | |
266 | } | |
dcb445bc | 267 | |
d5cc05c9 | 268 | *sock = -1; |
dcb445bc | 269 | |
d5cc05c9 MS |
270 | return (NULL); |
271 | } | |
12f89d24 MS |
272 | |
273 | # ifdef HAVE_POLL | |
d5cc05c9 MS |
274 | for (i = 0; i < nfds; i ++) |
275 | { | |
6fb588e0 MS |
276 | pfds[i].fd = fds[i]; |
277 | pfds[i].events = POLLIN | POLLOUT; | |
d5cc05c9 | 278 | } |
12f89d24 | 279 | |
6fb588e0 | 280 | result = poll(pfds, (nfds_t)nfds, addrlist ? 100 : remaining > 250 ? 250 : remaining); |
12f89d24 | 281 | |
d5cc05c9 | 282 | DEBUG_printf(("1httpAddrConnect2: poll() returned %d (%d)", result, errno)); |
dcb445bc | 283 | |
12f89d24 | 284 | # else |
d5cc05c9 MS |
285 | FD_ZERO(&input_set); |
286 | for (i = 0; i < nfds; i ++) | |
6fb588e0 | 287 | FD_SET(fds[i], &input_set); |
d5cc05c9 | 288 | output_set = input_set; |
4c3f8a9b | 289 | error_set = input_set; |
dcb445bc | 290 | |
d5cc05c9 | 291 | timeout.tv_sec = 0; |
6fb588e0 | 292 | timeout.tv_usec = (addrlist ? 100 : remaining > 250 ? 250 : remaining) * 1000; |
dcb445bc | 293 | |
4c3f8a9b | 294 | result = select(max_fd + 1, &input_set, &output_set, &error_set, &timeout); |
12f89d24 | 295 | |
d5cc05c9 | 296 | DEBUG_printf(("1httpAddrConnect2: select() returned %d (%d)", result, errno)); |
12f89d24 | 297 | # endif /* HAVE_POLL */ |
d5cc05c9 | 298 | } |
12f89d24 | 299 | # ifdef WIN32 |
d5cc05c9 | 300 | while (result < 0 && (WSAGetLastError() == WSAEINTR || WSAGetLastError() == WSAEWOULDBLOCK)); |
12f89d24 | 301 | # else |
d5cc05c9 | 302 | while (result < 0 && (errno == EINTR || errno == EAGAIN)); |
12f89d24 | 303 | # endif /* WIN32 */ |
dcb445bc | 304 | |
d5cc05c9 MS |
305 | if (result > 0) |
306 | { | |
307 | for (i = 0; i < nfds; i ++) | |
308 | { | |
309 | # ifdef HAVE_POLL | |
6fb588e0 | 310 | DEBUG_printf(("pfds[%d].revents=%x\n", i, pfds[i].revents)); |
4c3f8a9b | 311 | if (pfds[i].revents && !(pfds[i].revents & (POLLERR | POLLHUP))) |
d5cc05c9 | 312 | # else |
4c3f8a9b | 313 | if (FD_ISSET(fds[i], &input) && !FD_ISSET(fds[i], &error)) |
d5cc05c9 | 314 | # endif /* HAVE_POLL */ |
6fb588e0 MS |
315 | { |
316 | *sock = fds[i]; | |
317 | addrlist = addrs[i]; | |
318 | ||
319 | # ifdef DEBUG | |
d5cc05c9 MS |
320 | len = sizeof(peer); |
321 | if (!getpeername(fds[i], (struct sockaddr *)&peer, &len)) | |
d5cc05c9 | 322 | DEBUG_printf(("1httpAddrConnect2: Connected to %s:%d...", httpAddrString(&peer, temp, sizeof(temp)), httpAddrPort(&peer))); |
6fb588e0 | 323 | # endif /* DEBUG */ |
d5cc05c9 MS |
324 | } |
325 | else | |
326 | httpAddrClose(NULL, fds[i]); | |
dcb445bc | 327 | } |
d5cc05c9 MS |
328 | |
329 | return (addrlist); | |
1ff0402e | 330 | } |
dcb445bc | 331 | #endif /* O_NONBLOCK */ |
1ff0402e | 332 | |
6fb588e0 MS |
333 | if (addrlist) |
334 | remaining -= 100; | |
335 | else | |
336 | remaining -= 250; | |
337 | } | |
338 | ||
d5cc05c9 MS |
339 | while (nfds > 0) |
340 | { | |
341 | nfds --; | |
342 | httpAddrClose(NULL, fds[nfds]); | |
ef416fc2 | 343 | } |
344 | ||
12f89d24 | 345 | #ifdef WIN32 |
d5cc05c9 | 346 | _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, "Connection failed", 0); |
12f89d24 | 347 | #else |
d5cc05c9 | 348 | _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, strerror(errno), 0); |
12f89d24 | 349 | #endif /* WIN32 */ |
7cf5915e | 350 | |
d5cc05c9 | 351 | return (NULL); |
ef416fc2 | 352 | } |
353 | ||
354 | ||
a469f8a5 MS |
355 | /* |
356 | * 'httpAddrCopyList()' - Copy an address list. | |
357 | * | |
8072030b | 358 | * @since CUPS 1.7/macOS 10.9@ |
a469f8a5 MS |
359 | */ |
360 | ||
361 | http_addrlist_t * /* O - New address list or @code NULL@ on error */ | |
362 | httpAddrCopyList( | |
363 | http_addrlist_t *src) /* I - Source address list */ | |
364 | { | |
365 | http_addrlist_t *dst = NULL, /* First list entry */ | |
366 | *prev = NULL, /* Previous list entry */ | |
367 | *current = NULL;/* Current list entry */ | |
368 | ||
369 | ||
370 | while (src) | |
371 | { | |
372 | if ((current = malloc(sizeof(http_addrlist_t))) == NULL) | |
373 | { | |
374 | current = dst; | |
375 | ||
376 | while (current) | |
377 | { | |
378 | prev = current; | |
379 | current = current->next; | |
380 | ||
381 | free(prev); | |
382 | } | |
383 | ||
384 | return (NULL); | |
385 | } | |
386 | ||
387 | memcpy(current, src, sizeof(http_addrlist_t)); | |
388 | ||
389 | current->next = NULL; | |
390 | ||
391 | if (prev) | |
392 | prev->next = current; | |
393 | else | |
394 | dst = current; | |
395 | ||
db8b865d MS |
396 | prev = current; |
397 | src = src->next; | |
a469f8a5 MS |
398 | } |
399 | ||
400 | return (dst); | |
401 | } | |
402 | ||
403 | ||
ef416fc2 | 404 | /* |
405 | * 'httpAddrFreeList()' - Free an address list. | |
406 | * | |
8072030b | 407 | * @since CUPS 1.2/macOS 10.5@ |
ef416fc2 | 408 | */ |
409 | ||
410 | void | |
411 | httpAddrFreeList( | |
412 | http_addrlist_t *addrlist) /* I - Address list to free */ | |
413 | { | |
414 | http_addrlist_t *next; /* Next address in list */ | |
415 | ||
416 | ||
417 | /* | |
418 | * Free each address in the list... | |
419 | */ | |
420 | ||
421 | while (addrlist) | |
422 | { | |
423 | next = addrlist->next; | |
424 | ||
425 | free(addrlist); | |
426 | ||
427 | addrlist = next; | |
428 | } | |
429 | } | |
430 | ||
431 | ||
432 | /* | |
433 | * 'httpAddrGetList()' - Get a list of addresses for a hostname. | |
434 | * | |
8072030b | 435 | * @since CUPS 1.2/macOS 10.5@ |
ef416fc2 | 436 | */ |
437 | ||
438 | http_addrlist_t * /* O - List of addresses or NULL */ | |
439 | httpAddrGetList(const char *hostname, /* I - Hostname, IP address, or NULL for passive listen address */ | |
440 | int family, /* I - Address family or AF_UNSPEC */ | |
441 | const char *service) /* I - Service name or port number */ | |
442 | { | |
443 | http_addrlist_t *first, /* First address in list */ | |
444 | *addr, /* Current address in list */ | |
445 | *temp; /* New address */ | |
49d87452 MS |
446 | _cups_globals_t *cg = _cupsGlobals(); |
447 | /* Global data */ | |
ef416fc2 | 448 | |
449 | ||
450 | #ifdef DEBUG | |
ae71f5de MS |
451 | _cups_debug_printf("httpAddrGetList(hostname=\"%s\", family=AF_%s, " |
452 | "service=\"%s\")\n", | |
453 | hostname ? hostname : "(nil)", | |
454 | family == AF_UNSPEC ? "UNSPEC" : | |
ef416fc2 | 455 | # ifdef AF_LOCAL |
ae71f5de | 456 | family == AF_LOCAL ? "LOCAL" : |
ef416fc2 | 457 | # endif /* AF_LOCAL */ |
458 | # ifdef AF_INET6 | |
ae71f5de | 459 | family == AF_INET6 ? "INET6" : |
ef416fc2 | 460 | # endif /* AF_INET6 */ |
ae71f5de | 461 | family == AF_INET ? "INET" : "???", service); |
ef416fc2 | 462 | #endif /* DEBUG */ |
463 | ||
49d87452 MS |
464 | #ifdef HAVE_RES_INIT |
465 | /* | |
466 | * STR #2920: Initialize resolver after failure in cups-polld | |
467 | * | |
468 | * If the previous lookup failed, re-initialize the resolver to prevent | |
469 | * temporary network errors from persisting. This *should* be handled by | |
470 | * the resolver libraries, but apparently the glibc folks do not agree. | |
471 | * | |
472 | * We set a flag at the end of this function if we encounter an error that | |
473 | * requires reinitialization of the resolver functions. We then call | |
474 | * res_init() if the flag is set on the next call here or in httpAddrLookup(). | |
475 | */ | |
476 | ||
477 | if (cg->need_res_init) | |
478 | { | |
479 | res_init(); | |
480 | ||
481 | cg->need_res_init = 0; | |
482 | } | |
483 | #endif /* HAVE_RES_INIT */ | |
484 | ||
ef416fc2 | 485 | /* |
486 | * Lookup the address the best way we can... | |
487 | */ | |
488 | ||
489 | first = addr = NULL; | |
490 | ||
491 | #ifdef AF_LOCAL | |
492 | if (hostname && hostname[0] == '/') | |
493 | { | |
494 | /* | |
495 | * Domain socket address... | |
496 | */ | |
497 | ||
91c84a35 MS |
498 | if ((first = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t))) != NULL) |
499 | { | |
b1564bae | 500 | addr = first; |
91c84a35 MS |
501 | first->addr.un.sun_family = AF_LOCAL; |
502 | strlcpy(first->addr.un.sun_path, hostname, sizeof(first->addr.un.sun_path)); | |
503 | } | |
ef416fc2 | 504 | } |
505 | else | |
506 | #endif /* AF_LOCAL */ | |
88f9aafc | 507 | if (!hostname || _cups_strcasecmp(hostname, "localhost")) |
ef416fc2 | 508 | { |
509 | #ifdef HAVE_GETADDRINFO | |
510 | struct addrinfo hints, /* Address lookup hints */ | |
511 | *results, /* Address lookup results */ | |
512 | *current; /* Current result */ | |
82f97232 | 513 | char ipv6[64], /* IPv6 address */ |
ef416fc2 | 514 | *ipv6zone; /* Pointer to zone separator */ |
515 | int ipv6len; /* Length of IPv6 address */ | |
49d87452 MS |
516 | int error; /* getaddrinfo() error */ |
517 | ||
ef416fc2 | 518 | |
519 | /* | |
520 | * Lookup the address as needed... | |
521 | */ | |
522 | ||
523 | memset(&hints, 0, sizeof(hints)); | |
524 | hints.ai_family = family; | |
525 | hints.ai_flags = hostname ? 0 : AI_PASSIVE; | |
526 | hints.ai_socktype = SOCK_STREAM; | |
527 | ||
528 | if (hostname && *hostname == '[') | |
529 | { | |
530 | /* | |
531 | * Remove brackets from numeric IPv6 address... | |
532 | */ | |
533 | ||
534 | if (!strncmp(hostname, "[v1.", 4)) | |
535 | { | |
536 | /* | |
537 | * Copy the newer address format which supports link-local addresses... | |
538 | */ | |
539 | ||
540 | strlcpy(ipv6, hostname + 4, sizeof(ipv6)); | |
b86bc4cf | 541 | if ((ipv6len = (int)strlen(ipv6) - 1) >= 0 && ipv6[ipv6len] == ']') |
ef416fc2 | 542 | { |
543 | ipv6[ipv6len] = '\0'; | |
544 | hostname = ipv6; | |
545 | ||
546 | /* | |
547 | * Convert "+zone" in address to "%zone"... | |
548 | */ | |
549 | ||
550 | if ((ipv6zone = strrchr(ipv6, '+')) != NULL) | |
551 | *ipv6zone = '%'; | |
552 | } | |
553 | } | |
554 | else | |
555 | { | |
556 | /* | |
557 | * Copy the regular non-link-local IPv6 address... | |
558 | */ | |
559 | ||
560 | strlcpy(ipv6, hostname + 1, sizeof(ipv6)); | |
b86bc4cf | 561 | if ((ipv6len = (int)strlen(ipv6) - 1) >= 0 && ipv6[ipv6len] == ']') |
ef416fc2 | 562 | { |
563 | ipv6[ipv6len] = '\0'; | |
564 | hostname = ipv6; | |
565 | } | |
566 | } | |
567 | } | |
568 | ||
49d87452 | 569 | if ((error = getaddrinfo(hostname, service, &hints, &results)) == 0) |
ef416fc2 | 570 | { |
571 | /* | |
572 | * Copy the results to our own address list structure... | |
573 | */ | |
574 | ||
575 | for (current = results; current; current = current->ai_next) | |
576 | if (current->ai_family == AF_INET || current->ai_family == AF_INET6) | |
577 | { | |
578 | /* | |
579 | * Copy the address over... | |
580 | */ | |
581 | ||
582 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
583 | if (!temp) | |
584 | { | |
585 | httpAddrFreeList(first); | |
cb7f98ee | 586 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 587 | return (NULL); |
588 | } | |
589 | ||
590 | if (current->ai_family == AF_INET6) | |
591 | memcpy(&(temp->addr.ipv6), current->ai_addr, | |
592 | sizeof(temp->addr.ipv6)); | |
593 | else | |
594 | memcpy(&(temp->addr.ipv4), current->ai_addr, | |
595 | sizeof(temp->addr.ipv4)); | |
596 | ||
597 | /* | |
598 | * Append the address to the list... | |
599 | */ | |
600 | ||
601 | if (!first) | |
602 | first = temp; | |
603 | ||
604 | if (addr) | |
605 | addr->next = temp; | |
606 | ||
607 | addr = temp; | |
608 | } | |
609 | ||
610 | /* | |
611 | * Free the results from getaddrinfo()... | |
612 | */ | |
613 | ||
614 | freeaddrinfo(results); | |
615 | } | |
dcb445bc MS |
616 | else |
617 | { | |
618 | if (error == EAI_FAIL) | |
619 | cg->need_res_init = 1; | |
620 | ||
cb7f98ee | 621 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gai_strerror(error), 0); |
dcb445bc | 622 | } |
49d87452 | 623 | |
ef416fc2 | 624 | #else |
625 | if (hostname) | |
626 | { | |
627 | int i; /* Looping vars */ | |
628 | unsigned ip[4]; /* IPv4 address components */ | |
629 | const char *ptr; /* Pointer into hostname */ | |
630 | struct hostent *host; /* Result of lookup */ | |
631 | struct servent *port; /* Port number for service */ | |
632 | int portnum; /* Port number */ | |
633 | ||
634 | ||
635 | /* | |
636 | * Lookup the service... | |
637 | */ | |
638 | ||
639 | if (!service) | |
640 | portnum = 0; | |
641 | else if (isdigit(*service & 255)) | |
642 | portnum = atoi(service); | |
643 | else if ((port = getservbyname(service, NULL)) != NULL) | |
644 | portnum = ntohs(port->s_port); | |
645 | else if (!strcmp(service, "http")) | |
646 | portnum = 80; | |
647 | else if (!strcmp(service, "https")) | |
648 | portnum = 443; | |
321d8d57 | 649 | else if (!strcmp(service, "ipp") || !strcmp(service, "ipps")) |
ef416fc2 | 650 | portnum = 631; |
651 | else if (!strcmp(service, "lpd")) | |
652 | portnum = 515; | |
653 | else if (!strcmp(service, "socket")) | |
654 | portnum = 9100; | |
655 | else | |
656 | return (NULL); | |
657 | ||
658 | /* | |
659 | * This code is needed because some operating systems have a | |
660 | * buggy implementation of gethostbyname() that does not support | |
661 | * IPv4 addresses. If the hostname string is an IPv4 address, then | |
662 | * sscanf() is used to extract the IPv4 components. We then pack | |
663 | * the components into an IPv4 address manually, since the | |
664 | * inet_aton() function is deprecated. We use the htonl() macro | |
665 | * to get the right byte order for the address. | |
666 | */ | |
667 | ||
668 | for (ptr = hostname; isdigit(*ptr & 255) || *ptr == '.'; ptr ++); | |
669 | ||
670 | if (!*ptr) | |
671 | { | |
672 | /* | |
673 | * We have an IPv4 address; break it up and create an IPv4 address... | |
674 | */ | |
675 | ||
676 | if (sscanf(hostname, "%u.%u.%u.%u", ip, ip + 1, ip + 2, ip + 3) == 4 && | |
677 | ip[0] <= 255 && ip[1] <= 255 && ip[2] <= 255 && ip[3] <= 255) | |
678 | { | |
679 | first = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
680 | if (!first) | |
681 | return (NULL); | |
682 | ||
683 | first->addr.ipv4.sin_family = AF_INET; | |
da003234 MS |
684 | first->addr.ipv4.sin_addr.s_addr = htonl((((((((unsigned)ip[0] << 8) | |
685 | (unsigned)ip[1]) << 8) | | |
686 | (unsigned)ip[2]) << 8) | | |
687 | (unsigned)ip[3])); | |
ef416fc2 | 688 | first->addr.ipv4.sin_port = htons(portnum); |
689 | } | |
690 | } | |
691 | else if ((host = gethostbyname(hostname)) != NULL && | |
692 | # ifdef AF_INET6 | |
693 | (host->h_addrtype == AF_INET || host->h_addrtype == AF_INET6)) | |
694 | # else | |
695 | host->h_addrtype == AF_INET) | |
696 | # endif /* AF_INET6 */ | |
697 | { | |
698 | for (i = 0; host->h_addr_list[i]; i ++) | |
699 | { | |
700 | /* | |
701 | * Copy the address over... | |
702 | */ | |
703 | ||
704 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
705 | if (!temp) | |
706 | { | |
707 | httpAddrFreeList(first); | |
708 | return (NULL); | |
709 | } | |
710 | ||
711 | # ifdef AF_INET6 | |
712 | if (host->h_addrtype == AF_INET6) | |
713 | { | |
d6ae789d | 714 | temp->addr.ipv6.sin6_family = AF_INET6; |
ed486911 | 715 | memcpy(&(temp->addr.ipv6.sin6_addr), host->h_addr_list[i], |
ef416fc2 | 716 | sizeof(temp->addr.ipv6)); |
717 | temp->addr.ipv6.sin6_port = htons(portnum); | |
718 | } | |
719 | else | |
720 | # endif /* AF_INET6 */ | |
721 | { | |
d6ae789d | 722 | temp->addr.ipv4.sin_family = AF_INET; |
ed486911 | 723 | memcpy(&(temp->addr.ipv4.sin_addr), host->h_addr_list[i], |
ef416fc2 | 724 | sizeof(temp->addr.ipv4)); |
725 | temp->addr.ipv4.sin_port = htons(portnum); | |
726 | } | |
727 | ||
728 | /* | |
729 | * Append the address to the list... | |
730 | */ | |
731 | ||
732 | if (!first) | |
733 | first = temp; | |
734 | ||
735 | if (addr) | |
736 | addr->next = temp; | |
737 | ||
738 | addr = temp; | |
739 | } | |
740 | } | |
dcb445bc MS |
741 | else |
742 | { | |
743 | if (h_errno == NO_RECOVERY) | |
744 | cg->need_res_init = 1; | |
745 | ||
cb7f98ee | 746 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, hstrerror(h_errno), 0); |
dcb445bc | 747 | } |
ef416fc2 | 748 | } |
749 | #endif /* HAVE_GETADDRINFO */ | |
750 | } | |
751 | ||
752 | /* | |
753 | * Detect some common errors and handle them sanely... | |
754 | */ | |
755 | ||
88f9aafc | 756 | if (!addr && (!hostname || !_cups_strcasecmp(hostname, "localhost"))) |
ef416fc2 | 757 | { |
758 | struct servent *port; /* Port number for service */ | |
759 | int portnum; /* Port number */ | |
760 | ||
761 | ||
762 | /* | |
763 | * Lookup the service... | |
764 | */ | |
765 | ||
766 | if (!service) | |
767 | portnum = 0; | |
768 | else if (isdigit(*service & 255)) | |
769 | portnum = atoi(service); | |
770 | else if ((port = getservbyname(service, NULL)) != NULL) | |
771 | portnum = ntohs(port->s_port); | |
772 | else if (!strcmp(service, "http")) | |
773 | portnum = 80; | |
774 | else if (!strcmp(service, "https")) | |
775 | portnum = 443; | |
321d8d57 | 776 | else if (!strcmp(service, "ipp") || !strcmp(service, "ipps")) |
ef416fc2 | 777 | portnum = 631; |
778 | else if (!strcmp(service, "lpd")) | |
779 | portnum = 515; | |
780 | else if (!strcmp(service, "socket")) | |
781 | portnum = 9100; | |
782 | else | |
321d8d57 MS |
783 | { |
784 | httpAddrFreeList(first); | |
dcb445bc | 785 | |
cb7f98ee | 786 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unknown service name."), 1); |
ef416fc2 | 787 | return (NULL); |
321d8d57 | 788 | } |
ef416fc2 | 789 | |
88f9aafc | 790 | if (hostname && !_cups_strcasecmp(hostname, "localhost")) |
ef416fc2 | 791 | { |
792 | /* | |
793 | * Unfortunately, some users ignore all of the warnings in the | |
794 | * /etc/hosts file and delete "localhost" from it. If we get here | |
795 | * then we were unable to resolve the name, so use the IPv6 and/or | |
796 | * IPv4 loopback interface addresses... | |
797 | */ | |
798 | ||
799 | #ifdef AF_INET6 | |
800 | if (family != AF_INET) | |
801 | { | |
802 | /* | |
803 | * Add [::1] to the address list... | |
804 | */ | |
805 | ||
806 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
807 | if (!temp) | |
808 | { | |
cb7f98ee | 809 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 810 | httpAddrFreeList(first); |
811 | return (NULL); | |
812 | } | |
813 | ||
814 | temp->addr.ipv6.sin6_family = AF_INET6; | |
815 | temp->addr.ipv6.sin6_port = htons(portnum); | |
816 | # ifdef WIN32 | |
817 | temp->addr.ipv6.sin6_addr.u.Byte[15] = 1; | |
818 | # else | |
819 | temp->addr.ipv6.sin6_addr.s6_addr32[3] = htonl(1); | |
820 | # endif /* WIN32 */ | |
821 | ||
ed486911 | 822 | if (!first) |
823 | first = temp; | |
824 | ||
ef416fc2 | 825 | addr = temp; |
826 | } | |
827 | ||
828 | if (family != AF_INET6) | |
829 | #endif /* AF_INET6 */ | |
830 | { | |
831 | /* | |
832 | * Add 127.0.0.1 to the address list... | |
833 | */ | |
834 | ||
835 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
836 | if (!temp) | |
837 | { | |
cb7f98ee | 838 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 839 | httpAddrFreeList(first); |
840 | return (NULL); | |
841 | } | |
842 | ||
843 | temp->addr.ipv4.sin_family = AF_INET; | |
844 | temp->addr.ipv4.sin_port = htons(portnum); | |
845 | temp->addr.ipv4.sin_addr.s_addr = htonl(0x7f000001); | |
846 | ||
ed486911 | 847 | if (!first) |
848 | first = temp; | |
849 | ||
ef416fc2 | 850 | if (addr) |
851 | addr->next = temp; | |
ef416fc2 | 852 | } |
853 | } | |
854 | else if (!hostname) | |
855 | { | |
856 | /* | |
857 | * Provide one or more passive listening addresses... | |
858 | */ | |
859 | ||
860 | #ifdef AF_INET6 | |
861 | if (family != AF_INET) | |
862 | { | |
863 | /* | |
864 | * Add [::] to the address list... | |
865 | */ | |
866 | ||
867 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
868 | if (!temp) | |
869 | { | |
cb7f98ee | 870 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 871 | httpAddrFreeList(first); |
872 | return (NULL); | |
873 | } | |
874 | ||
875 | temp->addr.ipv6.sin6_family = AF_INET6; | |
876 | temp->addr.ipv6.sin6_port = htons(portnum); | |
877 | ||
ed486911 | 878 | if (!first) |
879 | first = temp; | |
880 | ||
ef416fc2 | 881 | addr = temp; |
882 | } | |
883 | ||
884 | if (family != AF_INET6) | |
885 | #endif /* AF_INET6 */ | |
886 | { | |
887 | /* | |
888 | * Add 0.0.0.0 to the address list... | |
889 | */ | |
890 | ||
891 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
892 | if (!temp) | |
893 | { | |
cb7f98ee | 894 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 895 | httpAddrFreeList(first); |
896 | return (NULL); | |
897 | } | |
898 | ||
899 | temp->addr.ipv4.sin_family = AF_INET; | |
900 | temp->addr.ipv4.sin_port = htons(portnum); | |
901 | ||
ed486911 | 902 | if (!first) |
903 | first = temp; | |
904 | ||
ef416fc2 | 905 | if (addr) |
906 | addr->next = temp; | |
ef416fc2 | 907 | } |
908 | } | |
909 | } | |
910 | ||
911 | /* | |
912 | * Return the address list... | |
913 | */ | |
914 | ||
915 | return (first); | |
916 | } |