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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 | * | |
f3c17241 | 35 | * @since CUPS 1.2/OS X 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 | * | |
9c0e8e5d | 53 | * @since CUPS 1.7/OS X 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 */ |
dcb445bc | 64 | #ifdef O_NONBLOCK |
dcb445bc MS |
65 | int flags, /* Socket flags */ |
66 | remaining; /* Remaining timeout */ | |
d5cc05c9 MS |
67 | int i, /* Looping var */ |
68 | nfds, /* Number of file descriptors */ | |
69 | fds[100], /* Socket file descriptors */ | |
70 | result; /* Result from select() or poll() */ | |
71 | http_addrlist_t *addrs[100]; /* Addresses */ | |
12f89d24 | 72 | # ifdef HAVE_POLL |
d5cc05c9 | 73 | struct pollfd pfds[100]; /* Polled file descriptors */ |
12f89d24 | 74 | # else |
d5cc05c9 | 75 | int max_fd = -1; /* Highest file descriptor */ |
dcb445bc MS |
76 | fd_set input_set, /* select() input set */ |
77 | output_set; /* select() output set */ | |
78 | struct timeval timeout; /* Timeout */ | |
12f89d24 | 79 | # endif /* HAVE_POLL */ |
12f89d24 | 80 | #endif /* O_NONBLOCK */ |
1ff0402e | 81 | #ifdef DEBUG |
6fb588e0 MS |
82 | socklen_t len; /* Length of value */ |
83 | http_addr_t peer; /* Peer address */ | |
10d09e33 | 84 | char temp[256]; /* Temporary address string */ |
1ff0402e | 85 | #endif /* DEBUG */ |
ef416fc2 | 86 | |
87 | ||
807315e6 | 88 | DEBUG_printf(("httpAddrConnect2(addrlist=%p, sock=%p, msec=%d, cancel=%p)", (void *)addrlist, (void *)sock, msec, (void *)cancel)); |
1ff0402e MS |
89 | |
90 | if (!sock) | |
91 | { | |
92 | errno = EINVAL; | |
cb7f98ee | 93 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
1ff0402e MS |
94 | return (NULL); |
95 | } | |
96 | ||
dcb445bc MS |
97 | if (cancel && *cancel) |
98 | return (NULL); | |
99 | ||
d5cc05c9 | 100 | if (msec <= 0) |
dcb445bc MS |
101 | msec = INT_MAX; |
102 | ||
ef416fc2 | 103 | /* |
104 | * Loop through each address until we connect or run out of addresses... | |
105 | */ | |
106 | ||
6fb588e0 MS |
107 | nfds = 0; |
108 | remaining = msec; | |
109 | ||
110 | while (remaining > 0) | |
ef416fc2 | 111 | { |
12f89d24 | 112 | if (cancel && *cancel) |
d5cc05c9 MS |
113 | { |
114 | while (nfds > 0) | |
115 | { | |
116 | nfds --; | |
117 | httpAddrClose(NULL, fds[nfds]); | |
118 | } | |
119 | ||
12f89d24 | 120 | return (NULL); |
d5cc05c9 | 121 | } |
12f89d24 | 122 | |
6fb588e0 | 123 | if (addrlist && nfds < (int)(sizeof(fds) / sizeof(fds[0]))) |
ef416fc2 | 124 | { |
125 | /* | |
6fb588e0 | 126 | * Create the socket... |
ef416fc2 | 127 | */ |
128 | ||
6fb588e0 | 129 | DEBUG_printf(("2httpAddrConnect2: Trying %s:%d...", httpAddrString(&(addrlist->addr), temp, sizeof(temp)), httpAddrPort(&(addrlist->addr)))); |
ef416fc2 | 130 | |
6fb588e0 MS |
131 | if ((fds[nfds] = (int)socket(httpAddrFamily(&(addrlist->addr)), SOCK_STREAM, 0)) < 0) |
132 | { | |
133 | /* | |
134 | * Don't abort yet, as this could just be an issue with the local | |
135 | * system not being configured with IPv4/IPv6/domain socket enabled... | |
136 | */ | |
ef416fc2 | 137 | |
6fb588e0 MS |
138 | continue; |
139 | } | |
140 | ||
141 | /* | |
142 | * Set options... | |
143 | */ | |
144 | ||
145 | val = 1; | |
146 | setsockopt(fds[nfds], SOL_SOCKET, SO_REUSEADDR, CUPS_SOCAST &val, sizeof(val)); | |
ef416fc2 | 147 | |
148 | #ifdef SO_REUSEPORT | |
6fb588e0 MS |
149 | val = 1; |
150 | setsockopt(fds[nfds], SOL_SOCKET, SO_REUSEPORT, CUPS_SOCAST &val, sizeof(val)); | |
ef416fc2 | 151 | #endif /* SO_REUSEPORT */ |
152 | ||
fa73b229 | 153 | #ifdef SO_NOSIGPIPE |
6fb588e0 MS |
154 | val = 1; |
155 | setsockopt(fds[nfds], SOL_SOCKET, SO_NOSIGPIPE, CUPS_SOCAST &val, sizeof(val)); | |
fa73b229 | 156 | #endif /* SO_NOSIGPIPE */ |
157 | ||
6fb588e0 MS |
158 | /* |
159 | * Using TCP_NODELAY improves responsiveness, especially on systems | |
160 | * with a slow loopback interface... | |
161 | */ | |
ef416fc2 | 162 | |
6fb588e0 MS |
163 | val = 1; |
164 | setsockopt(fds[nfds], IPPROTO_TCP, TCP_NODELAY, CUPS_SOCAST &val, sizeof(val)); | |
ef416fc2 | 165 | |
166 | #ifdef FD_CLOEXEC | |
6fb588e0 MS |
167 | /* |
168 | * Close this socket when starting another process... | |
169 | */ | |
ef416fc2 | 170 | |
6fb588e0 | 171 | fcntl(fds[nfds], F_SETFD, FD_CLOEXEC); |
ef416fc2 | 172 | #endif /* FD_CLOEXEC */ |
173 | ||
dcb445bc | 174 | #ifdef O_NONBLOCK |
6fb588e0 MS |
175 | /* |
176 | * Do an asynchronous connect by setting the socket non-blocking... | |
177 | */ | |
dcb445bc | 178 | |
6fb588e0 | 179 | DEBUG_printf(("httpAddrConnect2: Setting non-blocking connect()")); |
bb0d23b2 | 180 | |
6fb588e0 MS |
181 | flags = fcntl(fds[nfds], F_GETFL, 0); |
182 | fcntl(fds[nfds], F_SETFL, flags | O_NONBLOCK); | |
dcb445bc MS |
183 | #endif /* O_NONBLOCK */ |
184 | ||
6fb588e0 MS |
185 | /* |
186 | * Then connect... | |
187 | */ | |
ef416fc2 | 188 | |
6fb588e0 MS |
189 | if (!connect(fds[nfds], &(addrlist->addr.addr), (socklen_t)httpAddrLength(&(addrlist->addr)))) |
190 | { | |
191 | DEBUG_printf(("1httpAddrConnect2: Connected to %s:%d...", httpAddrString(&(addrlist->addr), temp, sizeof(temp)), httpAddrPort(&(addrlist->addr)))); | |
dcb445bc MS |
192 | |
193 | #ifdef O_NONBLOCK | |
6fb588e0 | 194 | fcntl(fds[nfds], F_SETFL, flags); |
dcb445bc MS |
195 | #endif /* O_NONBLOCK */ |
196 | ||
6fb588e0 | 197 | *sock = fds[nfds]; |
d5cc05c9 | 198 | |
6fb588e0 MS |
199 | while (nfds > 0) |
200 | { | |
201 | nfds --; | |
202 | httpAddrClose(NULL, fds[nfds]); | |
203 | } | |
d5cc05c9 | 204 | |
6fb588e0 MS |
205 | return (addrlist); |
206 | } | |
dcb445bc | 207 | |
d5cc05c9 | 208 | #ifdef WIN32 |
6fb588e0 | 209 | if (WSAGetLastError() != WSAEINPROGRESS && WSAGetLastError() != WSAEWOULDBLOCK) |
d5cc05c9 | 210 | #else |
6fb588e0 | 211 | if (errno != EINPROGRESS && errno != EWOULDBLOCK) |
d5cc05c9 | 212 | #endif /* WIN32 */ |
6fb588e0 MS |
213 | { |
214 | DEBUG_printf(("1httpAddrConnect2: Unable to connect to %s:%d: %s", httpAddrString(&(addrlist->addr), temp, sizeof(temp)), httpAddrPort(&(addrlist->addr)), strerror(errno))); | |
215 | httpAddrClose(NULL, fds[nfds]); | |
216 | continue; | |
217 | } | |
dcb445bc | 218 | |
6fb588e0 | 219 | fcntl(fds[nfds], F_SETFL, flags); |
dcb445bc | 220 | |
d5cc05c9 | 221 | #ifndef HAVE_POLL |
6fb588e0 MS |
222 | if (fds[nfds] > max_fd) |
223 | max_fd = fds[nfds]; | |
d5cc05c9 MS |
224 | #endif /* !HAVE_POLL */ |
225 | ||
6fb588e0 MS |
226 | addrs[nfds] = addrlist; |
227 | nfds ++; | |
228 | addrlist = addrlist->next; | |
229 | } | |
230 | ||
231 | /* | |
232 | * See if we can connect to any of the addresses so far... | |
233 | */ | |
d5cc05c9 MS |
234 | |
235 | #ifdef O_NONBLOCK | |
6fb588e0 | 236 | DEBUG_puts("1httpAddrConnect2: Finishing async connect()"); |
d5cc05c9 | 237 | |
d5cc05c9 MS |
238 | do |
239 | { | |
240 | if (cancel && *cancel) | |
12f89d24 | 241 | { |
d5cc05c9 MS |
242 | /* |
243 | * Close this socket and return... | |
244 | */ | |
dcb445bc | 245 | |
d5cc05c9 | 246 | DEBUG_puts("1httpAddrConnect2: Canceled connect()"); |
12f89d24 | 247 | |
d5cc05c9 MS |
248 | while (nfds > 0) |
249 | { | |
250 | nfds --; | |
251 | httpAddrClose(NULL, fds[nfds]); | |
252 | } | |
dcb445bc | 253 | |
d5cc05c9 | 254 | *sock = -1; |
dcb445bc | 255 | |
d5cc05c9 MS |
256 | return (NULL); |
257 | } | |
12f89d24 MS |
258 | |
259 | # ifdef HAVE_POLL | |
d5cc05c9 MS |
260 | for (i = 0; i < nfds; i ++) |
261 | { | |
6fb588e0 MS |
262 | pfds[i].fd = fds[i]; |
263 | pfds[i].events = POLLIN | POLLOUT; | |
d5cc05c9 | 264 | } |
12f89d24 | 265 | |
6fb588e0 | 266 | result = poll(pfds, (nfds_t)nfds, addrlist ? 100 : remaining > 250 ? 250 : remaining); |
12f89d24 | 267 | |
d5cc05c9 | 268 | DEBUG_printf(("1httpAddrConnect2: poll() returned %d (%d)", result, errno)); |
dcb445bc | 269 | |
12f89d24 | 270 | # else |
d5cc05c9 MS |
271 | FD_ZERO(&input_set); |
272 | for (i = 0; i < nfds; i ++) | |
6fb588e0 | 273 | FD_SET(fds[i], &input_set); |
d5cc05c9 | 274 | output_set = input_set; |
dcb445bc | 275 | |
d5cc05c9 | 276 | timeout.tv_sec = 0; |
6fb588e0 | 277 | timeout.tv_usec = (addrlist ? 100 : remaining > 250 ? 250 : remaining) * 1000; |
dcb445bc | 278 | |
d5cc05c9 | 279 | result = select(max_fd + 1, &input_set, &output_set, NULL, &timeout); |
12f89d24 | 280 | |
d5cc05c9 | 281 | DEBUG_printf(("1httpAddrConnect2: select() returned %d (%d)", result, errno)); |
12f89d24 | 282 | # endif /* HAVE_POLL */ |
d5cc05c9 | 283 | } |
12f89d24 | 284 | # ifdef WIN32 |
d5cc05c9 | 285 | while (result < 0 && (WSAGetLastError() == WSAEINTR || WSAGetLastError() == WSAEWOULDBLOCK)); |
12f89d24 | 286 | # else |
d5cc05c9 | 287 | while (result < 0 && (errno == EINTR || errno == EAGAIN)); |
12f89d24 | 288 | # endif /* WIN32 */ |
dcb445bc | 289 | |
d5cc05c9 MS |
290 | if (result > 0) |
291 | { | |
292 | for (i = 0; i < nfds; i ++) | |
293 | { | |
294 | # ifdef HAVE_POLL | |
6fb588e0 MS |
295 | DEBUG_printf(("pfds[%d].revents=%x\n", i, pfds[i].revents)); |
296 | if (pfds[i].revents) | |
d5cc05c9 | 297 | # else |
6fb588e0 | 298 | if (FD_ISSET(fds[i], &input)) |
d5cc05c9 | 299 | # endif /* HAVE_POLL */ |
6fb588e0 MS |
300 | { |
301 | *sock = fds[i]; | |
302 | addrlist = addrs[i]; | |
303 | ||
304 | # ifdef DEBUG | |
d5cc05c9 MS |
305 | len = sizeof(peer); |
306 | if (!getpeername(fds[i], (struct sockaddr *)&peer, &len)) | |
d5cc05c9 | 307 | DEBUG_printf(("1httpAddrConnect2: Connected to %s:%d...", httpAddrString(&peer, temp, sizeof(temp)), httpAddrPort(&peer))); |
6fb588e0 | 308 | # endif /* DEBUG */ |
d5cc05c9 MS |
309 | } |
310 | else | |
311 | httpAddrClose(NULL, fds[i]); | |
dcb445bc | 312 | } |
d5cc05c9 MS |
313 | |
314 | return (addrlist); | |
1ff0402e | 315 | } |
dcb445bc | 316 | #endif /* O_NONBLOCK */ |
1ff0402e | 317 | |
6fb588e0 MS |
318 | if (addrlist) |
319 | remaining -= 100; | |
320 | else | |
321 | remaining -= 250; | |
322 | } | |
323 | ||
d5cc05c9 MS |
324 | while (nfds > 0) |
325 | { | |
326 | nfds --; | |
327 | httpAddrClose(NULL, fds[nfds]); | |
ef416fc2 | 328 | } |
329 | ||
12f89d24 | 330 | #ifdef WIN32 |
d5cc05c9 | 331 | _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, "Connection failed", 0); |
12f89d24 | 332 | #else |
d5cc05c9 | 333 | _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, strerror(errno), 0); |
12f89d24 | 334 | #endif /* WIN32 */ |
7cf5915e | 335 | |
d5cc05c9 | 336 | return (NULL); |
ef416fc2 | 337 | } |
338 | ||
339 | ||
a469f8a5 MS |
340 | /* |
341 | * 'httpAddrCopyList()' - Copy an address list. | |
342 | * | |
9c0e8e5d | 343 | * @since CUPS 1.7/OS X 10.9@ |
a469f8a5 MS |
344 | */ |
345 | ||
346 | http_addrlist_t * /* O - New address list or @code NULL@ on error */ | |
347 | httpAddrCopyList( | |
348 | http_addrlist_t *src) /* I - Source address list */ | |
349 | { | |
350 | http_addrlist_t *dst = NULL, /* First list entry */ | |
351 | *prev = NULL, /* Previous list entry */ | |
352 | *current = NULL;/* Current list entry */ | |
353 | ||
354 | ||
355 | while (src) | |
356 | { | |
357 | if ((current = malloc(sizeof(http_addrlist_t))) == NULL) | |
358 | { | |
359 | current = dst; | |
360 | ||
361 | while (current) | |
362 | { | |
363 | prev = current; | |
364 | current = current->next; | |
365 | ||
366 | free(prev); | |
367 | } | |
368 | ||
369 | return (NULL); | |
370 | } | |
371 | ||
372 | memcpy(current, src, sizeof(http_addrlist_t)); | |
373 | ||
374 | current->next = NULL; | |
375 | ||
376 | if (prev) | |
377 | prev->next = current; | |
378 | else | |
379 | dst = current; | |
380 | ||
db8b865d MS |
381 | prev = current; |
382 | src = src->next; | |
a469f8a5 MS |
383 | } |
384 | ||
385 | return (dst); | |
386 | } | |
387 | ||
388 | ||
ef416fc2 | 389 | /* |
390 | * 'httpAddrFreeList()' - Free an address list. | |
391 | * | |
f3c17241 | 392 | * @since CUPS 1.2/OS X 10.5@ |
ef416fc2 | 393 | */ |
394 | ||
395 | void | |
396 | httpAddrFreeList( | |
397 | http_addrlist_t *addrlist) /* I - Address list to free */ | |
398 | { | |
399 | http_addrlist_t *next; /* Next address in list */ | |
400 | ||
401 | ||
402 | /* | |
403 | * Free each address in the list... | |
404 | */ | |
405 | ||
406 | while (addrlist) | |
407 | { | |
408 | next = addrlist->next; | |
409 | ||
410 | free(addrlist); | |
411 | ||
412 | addrlist = next; | |
413 | } | |
414 | } | |
415 | ||
416 | ||
417 | /* | |
418 | * 'httpAddrGetList()' - Get a list of addresses for a hostname. | |
419 | * | |
f3c17241 | 420 | * @since CUPS 1.2/OS X 10.5@ |
ef416fc2 | 421 | */ |
422 | ||
423 | http_addrlist_t * /* O - List of addresses or NULL */ | |
424 | httpAddrGetList(const char *hostname, /* I - Hostname, IP address, or NULL for passive listen address */ | |
425 | int family, /* I - Address family or AF_UNSPEC */ | |
426 | const char *service) /* I - Service name or port number */ | |
427 | { | |
428 | http_addrlist_t *first, /* First address in list */ | |
429 | *addr, /* Current address in list */ | |
430 | *temp; /* New address */ | |
49d87452 MS |
431 | _cups_globals_t *cg = _cupsGlobals(); |
432 | /* Global data */ | |
ef416fc2 | 433 | |
434 | ||
435 | #ifdef DEBUG | |
ae71f5de MS |
436 | _cups_debug_printf("httpAddrGetList(hostname=\"%s\", family=AF_%s, " |
437 | "service=\"%s\")\n", | |
438 | hostname ? hostname : "(nil)", | |
439 | family == AF_UNSPEC ? "UNSPEC" : | |
ef416fc2 | 440 | # ifdef AF_LOCAL |
ae71f5de | 441 | family == AF_LOCAL ? "LOCAL" : |
ef416fc2 | 442 | # endif /* AF_LOCAL */ |
443 | # ifdef AF_INET6 | |
ae71f5de | 444 | family == AF_INET6 ? "INET6" : |
ef416fc2 | 445 | # endif /* AF_INET6 */ |
ae71f5de | 446 | family == AF_INET ? "INET" : "???", service); |
ef416fc2 | 447 | #endif /* DEBUG */ |
448 | ||
49d87452 MS |
449 | #ifdef HAVE_RES_INIT |
450 | /* | |
451 | * STR #2920: Initialize resolver after failure in cups-polld | |
452 | * | |
453 | * If the previous lookup failed, re-initialize the resolver to prevent | |
454 | * temporary network errors from persisting. This *should* be handled by | |
455 | * the resolver libraries, but apparently the glibc folks do not agree. | |
456 | * | |
457 | * We set a flag at the end of this function if we encounter an error that | |
458 | * requires reinitialization of the resolver functions. We then call | |
459 | * res_init() if the flag is set on the next call here or in httpAddrLookup(). | |
460 | */ | |
461 | ||
462 | if (cg->need_res_init) | |
463 | { | |
464 | res_init(); | |
465 | ||
466 | cg->need_res_init = 0; | |
467 | } | |
468 | #endif /* HAVE_RES_INIT */ | |
469 | ||
ef416fc2 | 470 | /* |
471 | * Lookup the address the best way we can... | |
472 | */ | |
473 | ||
474 | first = addr = NULL; | |
475 | ||
476 | #ifdef AF_LOCAL | |
477 | if (hostname && hostname[0] == '/') | |
478 | { | |
479 | /* | |
480 | * Domain socket address... | |
481 | */ | |
482 | ||
91c84a35 MS |
483 | if ((first = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t))) != NULL) |
484 | { | |
b1564bae | 485 | addr = first; |
91c84a35 MS |
486 | first->addr.un.sun_family = AF_LOCAL; |
487 | strlcpy(first->addr.un.sun_path, hostname, sizeof(first->addr.un.sun_path)); | |
488 | } | |
ef416fc2 | 489 | } |
490 | else | |
491 | #endif /* AF_LOCAL */ | |
88f9aafc | 492 | if (!hostname || _cups_strcasecmp(hostname, "localhost")) |
ef416fc2 | 493 | { |
494 | #ifdef HAVE_GETADDRINFO | |
495 | struct addrinfo hints, /* Address lookup hints */ | |
496 | *results, /* Address lookup results */ | |
497 | *current; /* Current result */ | |
82f97232 | 498 | char ipv6[64], /* IPv6 address */ |
ef416fc2 | 499 | *ipv6zone; /* Pointer to zone separator */ |
500 | int ipv6len; /* Length of IPv6 address */ | |
49d87452 MS |
501 | int error; /* getaddrinfo() error */ |
502 | ||
ef416fc2 | 503 | |
504 | /* | |
505 | * Lookup the address as needed... | |
506 | */ | |
507 | ||
508 | memset(&hints, 0, sizeof(hints)); | |
509 | hints.ai_family = family; | |
510 | hints.ai_flags = hostname ? 0 : AI_PASSIVE; | |
511 | hints.ai_socktype = SOCK_STREAM; | |
512 | ||
513 | if (hostname && *hostname == '[') | |
514 | { | |
515 | /* | |
516 | * Remove brackets from numeric IPv6 address... | |
517 | */ | |
518 | ||
519 | if (!strncmp(hostname, "[v1.", 4)) | |
520 | { | |
521 | /* | |
522 | * Copy the newer address format which supports link-local addresses... | |
523 | */ | |
524 | ||
525 | strlcpy(ipv6, hostname + 4, sizeof(ipv6)); | |
b86bc4cf | 526 | if ((ipv6len = (int)strlen(ipv6) - 1) >= 0 && ipv6[ipv6len] == ']') |
ef416fc2 | 527 | { |
528 | ipv6[ipv6len] = '\0'; | |
529 | hostname = ipv6; | |
530 | ||
531 | /* | |
532 | * Convert "+zone" in address to "%zone"... | |
533 | */ | |
534 | ||
535 | if ((ipv6zone = strrchr(ipv6, '+')) != NULL) | |
536 | *ipv6zone = '%'; | |
537 | } | |
538 | } | |
539 | else | |
540 | { | |
541 | /* | |
542 | * Copy the regular non-link-local IPv6 address... | |
543 | */ | |
544 | ||
545 | strlcpy(ipv6, hostname + 1, sizeof(ipv6)); | |
b86bc4cf | 546 | if ((ipv6len = (int)strlen(ipv6) - 1) >= 0 && ipv6[ipv6len] == ']') |
ef416fc2 | 547 | { |
548 | ipv6[ipv6len] = '\0'; | |
549 | hostname = ipv6; | |
550 | } | |
551 | } | |
552 | } | |
553 | ||
49d87452 | 554 | if ((error = getaddrinfo(hostname, service, &hints, &results)) == 0) |
ef416fc2 | 555 | { |
556 | /* | |
557 | * Copy the results to our own address list structure... | |
558 | */ | |
559 | ||
560 | for (current = results; current; current = current->ai_next) | |
561 | if (current->ai_family == AF_INET || current->ai_family == AF_INET6) | |
562 | { | |
563 | /* | |
564 | * Copy the address over... | |
565 | */ | |
566 | ||
567 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
568 | if (!temp) | |
569 | { | |
570 | httpAddrFreeList(first); | |
cb7f98ee | 571 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 572 | return (NULL); |
573 | } | |
574 | ||
575 | if (current->ai_family == AF_INET6) | |
576 | memcpy(&(temp->addr.ipv6), current->ai_addr, | |
577 | sizeof(temp->addr.ipv6)); | |
578 | else | |
579 | memcpy(&(temp->addr.ipv4), current->ai_addr, | |
580 | sizeof(temp->addr.ipv4)); | |
581 | ||
582 | /* | |
583 | * Append the address to the list... | |
584 | */ | |
585 | ||
586 | if (!first) | |
587 | first = temp; | |
588 | ||
589 | if (addr) | |
590 | addr->next = temp; | |
591 | ||
592 | addr = temp; | |
593 | } | |
594 | ||
595 | /* | |
596 | * Free the results from getaddrinfo()... | |
597 | */ | |
598 | ||
599 | freeaddrinfo(results); | |
600 | } | |
dcb445bc MS |
601 | else |
602 | { | |
603 | if (error == EAI_FAIL) | |
604 | cg->need_res_init = 1; | |
605 | ||
cb7f98ee | 606 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gai_strerror(error), 0); |
dcb445bc | 607 | } |
49d87452 | 608 | |
ef416fc2 | 609 | #else |
610 | if (hostname) | |
611 | { | |
612 | int i; /* Looping vars */ | |
613 | unsigned ip[4]; /* IPv4 address components */ | |
614 | const char *ptr; /* Pointer into hostname */ | |
615 | struct hostent *host; /* Result of lookup */ | |
616 | struct servent *port; /* Port number for service */ | |
617 | int portnum; /* Port number */ | |
618 | ||
619 | ||
620 | /* | |
621 | * Lookup the service... | |
622 | */ | |
623 | ||
624 | if (!service) | |
625 | portnum = 0; | |
626 | else if (isdigit(*service & 255)) | |
627 | portnum = atoi(service); | |
628 | else if ((port = getservbyname(service, NULL)) != NULL) | |
629 | portnum = ntohs(port->s_port); | |
630 | else if (!strcmp(service, "http")) | |
631 | portnum = 80; | |
632 | else if (!strcmp(service, "https")) | |
633 | portnum = 443; | |
321d8d57 | 634 | else if (!strcmp(service, "ipp") || !strcmp(service, "ipps")) |
ef416fc2 | 635 | portnum = 631; |
636 | else if (!strcmp(service, "lpd")) | |
637 | portnum = 515; | |
638 | else if (!strcmp(service, "socket")) | |
639 | portnum = 9100; | |
640 | else | |
641 | return (NULL); | |
642 | ||
643 | /* | |
644 | * This code is needed because some operating systems have a | |
645 | * buggy implementation of gethostbyname() that does not support | |
646 | * IPv4 addresses. If the hostname string is an IPv4 address, then | |
647 | * sscanf() is used to extract the IPv4 components. We then pack | |
648 | * the components into an IPv4 address manually, since the | |
649 | * inet_aton() function is deprecated. We use the htonl() macro | |
650 | * to get the right byte order for the address. | |
651 | */ | |
652 | ||
653 | for (ptr = hostname; isdigit(*ptr & 255) || *ptr == '.'; ptr ++); | |
654 | ||
655 | if (!*ptr) | |
656 | { | |
657 | /* | |
658 | * We have an IPv4 address; break it up and create an IPv4 address... | |
659 | */ | |
660 | ||
661 | if (sscanf(hostname, "%u.%u.%u.%u", ip, ip + 1, ip + 2, ip + 3) == 4 && | |
662 | ip[0] <= 255 && ip[1] <= 255 && ip[2] <= 255 && ip[3] <= 255) | |
663 | { | |
664 | first = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
665 | if (!first) | |
666 | return (NULL); | |
667 | ||
668 | first->addr.ipv4.sin_family = AF_INET; | |
da003234 MS |
669 | first->addr.ipv4.sin_addr.s_addr = htonl((((((((unsigned)ip[0] << 8) | |
670 | (unsigned)ip[1]) << 8) | | |
671 | (unsigned)ip[2]) << 8) | | |
672 | (unsigned)ip[3])); | |
ef416fc2 | 673 | first->addr.ipv4.sin_port = htons(portnum); |
674 | } | |
675 | } | |
676 | else if ((host = gethostbyname(hostname)) != NULL && | |
677 | # ifdef AF_INET6 | |
678 | (host->h_addrtype == AF_INET || host->h_addrtype == AF_INET6)) | |
679 | # else | |
680 | host->h_addrtype == AF_INET) | |
681 | # endif /* AF_INET6 */ | |
682 | { | |
683 | for (i = 0; host->h_addr_list[i]; i ++) | |
684 | { | |
685 | /* | |
686 | * Copy the address over... | |
687 | */ | |
688 | ||
689 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
690 | if (!temp) | |
691 | { | |
692 | httpAddrFreeList(first); | |
693 | return (NULL); | |
694 | } | |
695 | ||
696 | # ifdef AF_INET6 | |
697 | if (host->h_addrtype == AF_INET6) | |
698 | { | |
d6ae789d | 699 | temp->addr.ipv6.sin6_family = AF_INET6; |
ed486911 | 700 | memcpy(&(temp->addr.ipv6.sin6_addr), host->h_addr_list[i], |
ef416fc2 | 701 | sizeof(temp->addr.ipv6)); |
702 | temp->addr.ipv6.sin6_port = htons(portnum); | |
703 | } | |
704 | else | |
705 | # endif /* AF_INET6 */ | |
706 | { | |
d6ae789d | 707 | temp->addr.ipv4.sin_family = AF_INET; |
ed486911 | 708 | memcpy(&(temp->addr.ipv4.sin_addr), host->h_addr_list[i], |
ef416fc2 | 709 | sizeof(temp->addr.ipv4)); |
710 | temp->addr.ipv4.sin_port = htons(portnum); | |
711 | } | |
712 | ||
713 | /* | |
714 | * Append the address to the list... | |
715 | */ | |
716 | ||
717 | if (!first) | |
718 | first = temp; | |
719 | ||
720 | if (addr) | |
721 | addr->next = temp; | |
722 | ||
723 | addr = temp; | |
724 | } | |
725 | } | |
dcb445bc MS |
726 | else |
727 | { | |
728 | if (h_errno == NO_RECOVERY) | |
729 | cg->need_res_init = 1; | |
730 | ||
cb7f98ee | 731 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, hstrerror(h_errno), 0); |
dcb445bc | 732 | } |
ef416fc2 | 733 | } |
734 | #endif /* HAVE_GETADDRINFO */ | |
735 | } | |
736 | ||
737 | /* | |
738 | * Detect some common errors and handle them sanely... | |
739 | */ | |
740 | ||
88f9aafc | 741 | if (!addr && (!hostname || !_cups_strcasecmp(hostname, "localhost"))) |
ef416fc2 | 742 | { |
743 | struct servent *port; /* Port number for service */ | |
744 | int portnum; /* Port number */ | |
745 | ||
746 | ||
747 | /* | |
748 | * Lookup the service... | |
749 | */ | |
750 | ||
751 | if (!service) | |
752 | portnum = 0; | |
753 | else if (isdigit(*service & 255)) | |
754 | portnum = atoi(service); | |
755 | else if ((port = getservbyname(service, NULL)) != NULL) | |
756 | portnum = ntohs(port->s_port); | |
757 | else if (!strcmp(service, "http")) | |
758 | portnum = 80; | |
759 | else if (!strcmp(service, "https")) | |
760 | portnum = 443; | |
321d8d57 | 761 | else if (!strcmp(service, "ipp") || !strcmp(service, "ipps")) |
ef416fc2 | 762 | portnum = 631; |
763 | else if (!strcmp(service, "lpd")) | |
764 | portnum = 515; | |
765 | else if (!strcmp(service, "socket")) | |
766 | portnum = 9100; | |
767 | else | |
321d8d57 MS |
768 | { |
769 | httpAddrFreeList(first); | |
dcb445bc | 770 | |
cb7f98ee | 771 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unknown service name."), 1); |
ef416fc2 | 772 | return (NULL); |
321d8d57 | 773 | } |
ef416fc2 | 774 | |
88f9aafc | 775 | if (hostname && !_cups_strcasecmp(hostname, "localhost")) |
ef416fc2 | 776 | { |
777 | /* | |
778 | * Unfortunately, some users ignore all of the warnings in the | |
779 | * /etc/hosts file and delete "localhost" from it. If we get here | |
780 | * then we were unable to resolve the name, so use the IPv6 and/or | |
781 | * IPv4 loopback interface addresses... | |
782 | */ | |
783 | ||
784 | #ifdef AF_INET6 | |
785 | if (family != AF_INET) | |
786 | { | |
787 | /* | |
788 | * Add [::1] to the address list... | |
789 | */ | |
790 | ||
791 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
792 | if (!temp) | |
793 | { | |
cb7f98ee | 794 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 795 | httpAddrFreeList(first); |
796 | return (NULL); | |
797 | } | |
798 | ||
799 | temp->addr.ipv6.sin6_family = AF_INET6; | |
800 | temp->addr.ipv6.sin6_port = htons(portnum); | |
801 | # ifdef WIN32 | |
802 | temp->addr.ipv6.sin6_addr.u.Byte[15] = 1; | |
803 | # else | |
804 | temp->addr.ipv6.sin6_addr.s6_addr32[3] = htonl(1); | |
805 | # endif /* WIN32 */ | |
806 | ||
ed486911 | 807 | if (!first) |
808 | first = temp; | |
809 | ||
ef416fc2 | 810 | addr = temp; |
811 | } | |
812 | ||
813 | if (family != AF_INET6) | |
814 | #endif /* AF_INET6 */ | |
815 | { | |
816 | /* | |
817 | * Add 127.0.0.1 to the address list... | |
818 | */ | |
819 | ||
820 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
821 | if (!temp) | |
822 | { | |
cb7f98ee | 823 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 824 | httpAddrFreeList(first); |
825 | return (NULL); | |
826 | } | |
827 | ||
828 | temp->addr.ipv4.sin_family = AF_INET; | |
829 | temp->addr.ipv4.sin_port = htons(portnum); | |
830 | temp->addr.ipv4.sin_addr.s_addr = htonl(0x7f000001); | |
831 | ||
ed486911 | 832 | if (!first) |
833 | first = temp; | |
834 | ||
ef416fc2 | 835 | if (addr) |
836 | addr->next = temp; | |
ef416fc2 | 837 | } |
838 | } | |
839 | else if (!hostname) | |
840 | { | |
841 | /* | |
842 | * Provide one or more passive listening addresses... | |
843 | */ | |
844 | ||
845 | #ifdef AF_INET6 | |
846 | if (family != AF_INET) | |
847 | { | |
848 | /* | |
849 | * Add [::] to the address list... | |
850 | */ | |
851 | ||
852 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
853 | if (!temp) | |
854 | { | |
cb7f98ee | 855 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 856 | httpAddrFreeList(first); |
857 | return (NULL); | |
858 | } | |
859 | ||
860 | temp->addr.ipv6.sin6_family = AF_INET6; | |
861 | temp->addr.ipv6.sin6_port = htons(portnum); | |
862 | ||
ed486911 | 863 | if (!first) |
864 | first = temp; | |
865 | ||
ef416fc2 | 866 | addr = temp; |
867 | } | |
868 | ||
869 | if (family != AF_INET6) | |
870 | #endif /* AF_INET6 */ | |
871 | { | |
872 | /* | |
873 | * Add 0.0.0.0 to the address list... | |
874 | */ | |
875 | ||
876 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
877 | if (!temp) | |
878 | { | |
cb7f98ee | 879 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 880 | httpAddrFreeList(first); |
881 | return (NULL); | |
882 | } | |
883 | ||
884 | temp->addr.ipv4.sin_family = AF_INET; | |
885 | temp->addr.ipv4.sin_port = htons(portnum); | |
886 | ||
ed486911 | 887 | if (!first) |
888 | first = temp; | |
889 | ||
ef416fc2 | 890 | if (addr) |
891 | addr->next = temp; | |
ef416fc2 | 892 | } |
893 | } | |
894 | } | |
895 | ||
896 | /* | |
897 | * Return the address list... | |
898 | */ | |
899 | ||
900 | return (first); | |
901 | } |