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Commit | Line | Data |
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ef416fc2 | 1 | /* |
da003234 | 2 | * HTTP address list routines for CUPS. |
ef416fc2 | 3 | * |
3416fe95 | 4 | * Copyright 2007-2018 by Apple Inc. |
da003234 | 5 | * Copyright 1997-2007 by Easy Software Products, all rights reserved. |
ef416fc2 | 6 | * |
3416fe95 MS |
7 | * Licensed under Apache License v2.0. See the file "LICENSE" for more |
8 | * information. | |
ef416fc2 | 9 | */ |
10 | ||
11 | /* | |
12 | * Include necessary headers... | |
13 | */ | |
14 | ||
71e16022 | 15 | #include "cups-private.h" |
fb863569 | 16 | #include "debug-internal.h" |
49d87452 MS |
17 | #ifdef HAVE_RESOLV_H |
18 | # include <resolv.h> | |
19 | #endif /* HAVE_RESOLV_H */ | |
dcb445bc MS |
20 | #ifdef HAVE_POLL |
21 | # include <poll.h> | |
22 | #endif /* HAVE_POLL */ | |
19dc16f7 | 23 | #ifndef _WIN32 |
6961465f | 24 | # include <fcntl.h> |
19dc16f7 | 25 | #endif /* _WIN32 */ |
ef416fc2 | 26 | |
27 | ||
28 | /* | |
29 | * 'httpAddrConnect()' - Connect to any of the addresses in the list. | |
30 | * | |
53af7f21 | 31 | * @since CUPS 1.2/macOS 10.5@ @exclude all@ |
ef416fc2 | 32 | */ |
33 | ||
34 | http_addrlist_t * /* O - Connected address or NULL on failure */ | |
35 | httpAddrConnect( | |
36 | http_addrlist_t *addrlist, /* I - List of potential addresses */ | |
37 | int *sock) /* O - Socket */ | |
dcb445bc | 38 | { |
807315e6 | 39 | DEBUG_printf(("httpAddrConnect(addrlist=%p, sock=%p)", (void *)addrlist, (void *)sock)); |
dcb445bc MS |
40 | |
41 | return (httpAddrConnect2(addrlist, sock, 30000, NULL)); | |
42 | } | |
43 | ||
44 | ||
45 | /* | |
46 | * 'httpAddrConnect2()' - Connect to any of the addresses in the list with a | |
47 | * timeout and optional cancel. | |
48 | * | |
8072030b | 49 | * @since CUPS 1.7/macOS 10.9@ |
dcb445bc MS |
50 | */ |
51 | ||
52 | http_addrlist_t * /* O - Connected address or NULL on failure */ | |
53 | httpAddrConnect2( | |
54 | http_addrlist_t *addrlist, /* I - List of potential addresses */ | |
55 | int *sock, /* O - Socket */ | |
56 | int msec, /* I - Timeout in milliseconds */ | |
57 | int *cancel) /* I - Pointer to "cancel" variable */ | |
ef416fc2 | 58 | { |
10d09e33 | 59 | int val; /* Socket option value */ |
19dc16f7 | 60 | #ifndef _WIN32 |
7b0a28e3 | 61 | int i, j, /* Looping vars */ |
86206ccf | 62 | flags, /* Socket flags */ |
d5cc05c9 | 63 | result; /* Result from select() or poll() */ |
86206ccf MS |
64 | #endif /* !_WIN32 */ |
65 | int remaining; /* Remaining timeout */ | |
66 | int nfds, /* Number of file descriptors */ | |
67 | fds[100]; /* Socket file descriptors */ | |
d5cc05c9 | 68 | http_addrlist_t *addrs[100]; /* Addresses */ |
21aa3f37 MS |
69 | #ifndef HAVE_POLL |
70 | int max_fd = -1; /* Highest file descriptor */ | |
71 | #endif /* !HAVE_POLL */ | |
72 | #ifdef O_NONBLOCK | |
12f89d24 | 73 | # ifdef HAVE_POLL |
d5cc05c9 | 74 | struct pollfd pfds[100]; /* Polled file descriptors */ |
12f89d24 | 75 | # else |
dcb445bc | 76 | fd_set input_set, /* select() input set */ |
4c3f8a9b MS |
77 | output_set, /* select() output set */ |
78 | error_set; /* select() error set */ | |
dcb445bc | 79 | struct timeval timeout; /* Timeout */ |
12f89d24 | 80 | # endif /* HAVE_POLL */ |
12f89d24 | 81 | #endif /* O_NONBLOCK */ |
1ff0402e | 82 | #ifdef DEBUG |
86206ccf | 83 | # ifndef _WIN32 |
6fb588e0 MS |
84 | socklen_t len; /* Length of value */ |
85 | http_addr_t peer; /* Peer address */ | |
86206ccf | 86 | # endif /* !_WIN32 */ |
10d09e33 | 87 | char temp[256]; /* Temporary address string */ |
1ff0402e | 88 | #endif /* DEBUG */ |
ef416fc2 | 89 | |
90 | ||
807315e6 | 91 | DEBUG_printf(("httpAddrConnect2(addrlist=%p, sock=%p, msec=%d, cancel=%p)", (void *)addrlist, (void *)sock, msec, (void *)cancel)); |
1ff0402e MS |
92 | |
93 | if (!sock) | |
94 | { | |
95 | errno = EINVAL; | |
cb7f98ee | 96 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
1ff0402e MS |
97 | return (NULL); |
98 | } | |
99 | ||
dcb445bc MS |
100 | if (cancel && *cancel) |
101 | return (NULL); | |
102 | ||
d5cc05c9 | 103 | if (msec <= 0) |
dcb445bc MS |
104 | msec = INT_MAX; |
105 | ||
ef416fc2 | 106 | /* |
107 | * Loop through each address until we connect or run out of addresses... | |
108 | */ | |
109 | ||
6fb588e0 MS |
110 | nfds = 0; |
111 | remaining = msec; | |
112 | ||
113 | while (remaining > 0) | |
ef416fc2 | 114 | { |
12f89d24 | 115 | if (cancel && *cancel) |
d5cc05c9 MS |
116 | { |
117 | while (nfds > 0) | |
118 | { | |
119 | nfds --; | |
120 | httpAddrClose(NULL, fds[nfds]); | |
121 | } | |
122 | ||
12f89d24 | 123 | return (NULL); |
d5cc05c9 | 124 | } |
12f89d24 | 125 | |
6fb588e0 | 126 | if (addrlist && nfds < (int)(sizeof(fds) / sizeof(fds[0]))) |
ef416fc2 | 127 | { |
128 | /* | |
6fb588e0 | 129 | * Create the socket... |
ef416fc2 | 130 | */ |
131 | ||
6fb588e0 | 132 | DEBUG_printf(("2httpAddrConnect2: Trying %s:%d...", httpAddrString(&(addrlist->addr), temp, sizeof(temp)), httpAddrPort(&(addrlist->addr)))); |
ef416fc2 | 133 | |
6fb588e0 MS |
134 | if ((fds[nfds] = (int)socket(httpAddrFamily(&(addrlist->addr)), SOCK_STREAM, 0)) < 0) |
135 | { | |
136 | /* | |
137 | * Don't abort yet, as this could just be an issue with the local | |
34016d2a MS |
138 | * system not being configured with IPv4/IPv6/domain socket enabled. |
139 | * | |
140 | * Just skip this address... | |
6fb588e0 | 141 | */ |
ef416fc2 | 142 | |
34016d2a | 143 | addrlist = addrlist->next; |
6fb588e0 MS |
144 | continue; |
145 | } | |
146 | ||
147 | /* | |
148 | * Set options... | |
149 | */ | |
150 | ||
151 | val = 1; | |
152 | setsockopt(fds[nfds], SOL_SOCKET, SO_REUSEADDR, CUPS_SOCAST &val, sizeof(val)); | |
ef416fc2 | 153 | |
154 | #ifdef SO_REUSEPORT | |
6fb588e0 MS |
155 | val = 1; |
156 | setsockopt(fds[nfds], SOL_SOCKET, SO_REUSEPORT, CUPS_SOCAST &val, sizeof(val)); | |
ef416fc2 | 157 | #endif /* SO_REUSEPORT */ |
158 | ||
fa73b229 | 159 | #ifdef SO_NOSIGPIPE |
6fb588e0 MS |
160 | val = 1; |
161 | setsockopt(fds[nfds], SOL_SOCKET, SO_NOSIGPIPE, CUPS_SOCAST &val, sizeof(val)); | |
fa73b229 | 162 | #endif /* SO_NOSIGPIPE */ |
163 | ||
6fb588e0 MS |
164 | /* |
165 | * Using TCP_NODELAY improves responsiveness, especially on systems | |
166 | * with a slow loopback interface... | |
167 | */ | |
ef416fc2 | 168 | |
6fb588e0 MS |
169 | val = 1; |
170 | setsockopt(fds[nfds], IPPROTO_TCP, TCP_NODELAY, CUPS_SOCAST &val, sizeof(val)); | |
ef416fc2 | 171 | |
172 | #ifdef FD_CLOEXEC | |
6fb588e0 MS |
173 | /* |
174 | * Close this socket when starting another process... | |
175 | */ | |
ef416fc2 | 176 | |
6fb588e0 | 177 | fcntl(fds[nfds], F_SETFD, FD_CLOEXEC); |
ef416fc2 | 178 | #endif /* FD_CLOEXEC */ |
179 | ||
dcb445bc | 180 | #ifdef O_NONBLOCK |
6fb588e0 MS |
181 | /* |
182 | * Do an asynchronous connect by setting the socket non-blocking... | |
183 | */ | |
dcb445bc | 184 | |
6fb588e0 | 185 | DEBUG_printf(("httpAddrConnect2: Setting non-blocking connect()")); |
bb0d23b2 | 186 | |
6fb588e0 MS |
187 | flags = fcntl(fds[nfds], F_GETFL, 0); |
188 | fcntl(fds[nfds], F_SETFL, flags | O_NONBLOCK); | |
dcb445bc MS |
189 | #endif /* O_NONBLOCK */ |
190 | ||
6fb588e0 MS |
191 | /* |
192 | * Then connect... | |
193 | */ | |
ef416fc2 | 194 | |
6fb588e0 MS |
195 | if (!connect(fds[nfds], &(addrlist->addr.addr), (socklen_t)httpAddrLength(&(addrlist->addr)))) |
196 | { | |
197 | DEBUG_printf(("1httpAddrConnect2: Connected to %s:%d...", httpAddrString(&(addrlist->addr), temp, sizeof(temp)), httpAddrPort(&(addrlist->addr)))); | |
dcb445bc MS |
198 | |
199 | #ifdef O_NONBLOCK | |
6fb588e0 | 200 | fcntl(fds[nfds], F_SETFL, flags); |
dcb445bc MS |
201 | #endif /* O_NONBLOCK */ |
202 | ||
6fb588e0 | 203 | *sock = fds[nfds]; |
d5cc05c9 | 204 | |
6fb588e0 MS |
205 | while (nfds > 0) |
206 | { | |
207 | nfds --; | |
208 | httpAddrClose(NULL, fds[nfds]); | |
209 | } | |
d5cc05c9 | 210 | |
6fb588e0 MS |
211 | return (addrlist); |
212 | } | |
dcb445bc | 213 | |
19dc16f7 | 214 | #ifdef _WIN32 |
6fb588e0 | 215 | if (WSAGetLastError() != WSAEINPROGRESS && WSAGetLastError() != WSAEWOULDBLOCK) |
d5cc05c9 | 216 | #else |
6fb588e0 | 217 | if (errno != EINPROGRESS && errno != EWOULDBLOCK) |
19dc16f7 | 218 | #endif /* _WIN32 */ |
6fb588e0 MS |
219 | { |
220 | DEBUG_printf(("1httpAddrConnect2: Unable to connect to %s:%d: %s", httpAddrString(&(addrlist->addr), temp, sizeof(temp)), httpAddrPort(&(addrlist->addr)), strerror(errno))); | |
221 | httpAddrClose(NULL, fds[nfds]); | |
34016d2a | 222 | addrlist = addrlist->next; |
6fb588e0 MS |
223 | continue; |
224 | } | |
dcb445bc | 225 | |
19dc16f7 | 226 | #ifndef _WIN32 |
6fb588e0 | 227 | fcntl(fds[nfds], F_SETFL, flags); |
19dc16f7 | 228 | #endif /* !_WIN32 */ |
dcb445bc | 229 | |
d5cc05c9 | 230 | #ifndef HAVE_POLL |
6fb588e0 MS |
231 | if (fds[nfds] > max_fd) |
232 | max_fd = fds[nfds]; | |
d5cc05c9 MS |
233 | #endif /* !HAVE_POLL */ |
234 | ||
6fb588e0 MS |
235 | addrs[nfds] = addrlist; |
236 | nfds ++; | |
237 | addrlist = addrlist->next; | |
238 | } | |
239 | ||
e8916f41 | 240 | if (!addrlist && nfds == 0) |
064e50fb MS |
241 | { |
242 | #ifdef _WIN32 | |
243 | errno = WSAEHOSTDOWN; | |
244 | #else | |
245 | errno = EHOSTDOWN; | |
246 | #endif // _WIN32 | |
e8916f41 | 247 | break; |
064e50fb | 248 | } |
e8916f41 | 249 | |
6fb588e0 MS |
250 | /* |
251 | * See if we can connect to any of the addresses so far... | |
252 | */ | |
d5cc05c9 MS |
253 | |
254 | #ifdef O_NONBLOCK | |
6fb588e0 | 255 | DEBUG_puts("1httpAddrConnect2: Finishing async connect()"); |
d5cc05c9 | 256 | |
d5cc05c9 MS |
257 | do |
258 | { | |
259 | if (cancel && *cancel) | |
12f89d24 | 260 | { |
d5cc05c9 MS |
261 | /* |
262 | * Close this socket and return... | |
263 | */ | |
dcb445bc | 264 | |
d5cc05c9 | 265 | DEBUG_puts("1httpAddrConnect2: Canceled connect()"); |
12f89d24 | 266 | |
d5cc05c9 MS |
267 | while (nfds > 0) |
268 | { | |
269 | nfds --; | |
270 | httpAddrClose(NULL, fds[nfds]); | |
271 | } | |
dcb445bc | 272 | |
d5cc05c9 | 273 | *sock = -1; |
dcb445bc | 274 | |
d5cc05c9 MS |
275 | return (NULL); |
276 | } | |
12f89d24 MS |
277 | |
278 | # ifdef HAVE_POLL | |
d5cc05c9 MS |
279 | for (i = 0; i < nfds; i ++) |
280 | { | |
6fb588e0 MS |
281 | pfds[i].fd = fds[i]; |
282 | pfds[i].events = POLLIN | POLLOUT; | |
d5cc05c9 | 283 | } |
12f89d24 | 284 | |
6fb588e0 | 285 | result = poll(pfds, (nfds_t)nfds, addrlist ? 100 : remaining > 250 ? 250 : remaining); |
12f89d24 | 286 | |
d5cc05c9 | 287 | DEBUG_printf(("1httpAddrConnect2: poll() returned %d (%d)", result, errno)); |
dcb445bc | 288 | |
12f89d24 | 289 | # else |
d5cc05c9 MS |
290 | FD_ZERO(&input_set); |
291 | for (i = 0; i < nfds; i ++) | |
6fb588e0 | 292 | FD_SET(fds[i], &input_set); |
d5cc05c9 | 293 | output_set = input_set; |
4c3f8a9b | 294 | error_set = input_set; |
dcb445bc | 295 | |
d5cc05c9 | 296 | timeout.tv_sec = 0; |
6fb588e0 | 297 | timeout.tv_usec = (addrlist ? 100 : remaining > 250 ? 250 : remaining) * 1000; |
dcb445bc | 298 | |
4c3f8a9b | 299 | result = select(max_fd + 1, &input_set, &output_set, &error_set, &timeout); |
12f89d24 | 300 | |
d5cc05c9 | 301 | DEBUG_printf(("1httpAddrConnect2: select() returned %d (%d)", result, errno)); |
12f89d24 | 302 | # endif /* HAVE_POLL */ |
d5cc05c9 | 303 | } |
19dc16f7 | 304 | # ifdef _WIN32 |
d5cc05c9 | 305 | while (result < 0 && (WSAGetLastError() == WSAEINTR || WSAGetLastError() == WSAEWOULDBLOCK)); |
12f89d24 | 306 | # else |
d5cc05c9 | 307 | while (result < 0 && (errno == EINTR || errno == EAGAIN)); |
19dc16f7 | 308 | # endif /* _WIN32 */ |
dcb445bc | 309 | |
d5cc05c9 MS |
310 | if (result > 0) |
311 | { | |
0ca77b3e MS |
312 | http_addrlist_t *connaddr = NULL; /* Connected address, if any */ |
313 | ||
d5cc05c9 MS |
314 | for (i = 0; i < nfds; i ++) |
315 | { | |
316 | # ifdef HAVE_POLL | |
6fb588e0 | 317 | DEBUG_printf(("pfds[%d].revents=%x\n", i, pfds[i].revents)); |
4c3f8a9b | 318 | if (pfds[i].revents && !(pfds[i].revents & (POLLERR | POLLHUP))) |
d5cc05c9 | 319 | # else |
c7505715 | 320 | if (FD_ISSET(fds[i], &input_set) && !FD_ISSET(fds[i], &error_set)) |
d5cc05c9 | 321 | # endif /* HAVE_POLL */ |
6fb588e0 MS |
322 | { |
323 | *sock = fds[i]; | |
0ca77b3e | 324 | connaddr = addrs[i]; |
6fb588e0 MS |
325 | |
326 | # ifdef DEBUG | |
d5cc05c9 MS |
327 | len = sizeof(peer); |
328 | if (!getpeername(fds[i], (struct sockaddr *)&peer, &len)) | |
d5cc05c9 | 329 | DEBUG_printf(("1httpAddrConnect2: Connected to %s:%d...", httpAddrString(&peer, temp, sizeof(temp)), httpAddrPort(&peer))); |
6fb588e0 | 330 | # endif /* DEBUG */ |
7b0a28e3 MS |
331 | |
332 | break; | |
d5cc05c9 | 333 | } |
0ca77b3e MS |
334 | # ifdef HAVE_POLL |
335 | else if (pfds[i].revents & (POLLERR | POLLHUP)) | |
336 | # else | |
c7505715 | 337 | else if (FD_ISSET(fds[i], &error_set)) |
0ca77b3e MS |
338 | # endif /* HAVE_POLL */ |
339 | { | |
340 | /* | |
341 | * Error on socket, remove from the "pool"... | |
342 | */ | |
343 | ||
d5cc05c9 | 344 | httpAddrClose(NULL, fds[i]); |
0ca77b3e MS |
345 | nfds --; |
346 | if (i < nfds) | |
347 | { | |
348 | memmove(fds + i, fds + i + 1, (size_t)(nfds - i) * (sizeof(fds[0]))); | |
349 | memmove(addrs + i, addrs + i + 1, (size_t)(nfds - i) * (sizeof(addrs[0]))); | |
350 | } | |
351 | i --; | |
352 | } | |
dcb445bc | 353 | } |
d5cc05c9 | 354 | |
0ca77b3e | 355 | if (connaddr) |
7b0a28e3 MS |
356 | { |
357 | /* | |
358 | * Connected on one address, close all of the other sockets we have so | |
359 | * far and return... | |
360 | */ | |
361 | ||
362 | for (j = 0; j < i; j ++) | |
363 | httpAddrClose(NULL, fds[j]); | |
364 | ||
365 | for (j ++; j < nfds; j ++) | |
366 | httpAddrClose(NULL, fds[j]); | |
367 | ||
0ca77b3e | 368 | return (connaddr); |
7b0a28e3 | 369 | } |
1ff0402e | 370 | } |
dcb445bc | 371 | #endif /* O_NONBLOCK */ |
1ff0402e | 372 | |
6fb588e0 MS |
373 | if (addrlist) |
374 | remaining -= 100; | |
375 | else | |
376 | remaining -= 250; | |
377 | } | |
378 | ||
064e50fb MS |
379 | if (remaining <= 0) |
380 | errno = ETIMEDOUT; | |
381 | ||
d5cc05c9 MS |
382 | while (nfds > 0) |
383 | { | |
384 | nfds --; | |
385 | httpAddrClose(NULL, fds[nfds]); | |
ef416fc2 | 386 | } |
387 | ||
19dc16f7 | 388 | #ifdef _WIN32 |
d5cc05c9 | 389 | _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, "Connection failed", 0); |
12f89d24 | 390 | #else |
d5cc05c9 | 391 | _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, strerror(errno), 0); |
19dc16f7 | 392 | #endif /* _WIN32 */ |
7cf5915e | 393 | |
d5cc05c9 | 394 | return (NULL); |
ef416fc2 | 395 | } |
396 | ||
397 | ||
a469f8a5 MS |
398 | /* |
399 | * 'httpAddrCopyList()' - Copy an address list. | |
400 | * | |
8072030b | 401 | * @since CUPS 1.7/macOS 10.9@ |
a469f8a5 MS |
402 | */ |
403 | ||
404 | http_addrlist_t * /* O - New address list or @code NULL@ on error */ | |
405 | httpAddrCopyList( | |
406 | http_addrlist_t *src) /* I - Source address list */ | |
407 | { | |
408 | http_addrlist_t *dst = NULL, /* First list entry */ | |
409 | *prev = NULL, /* Previous list entry */ | |
410 | *current = NULL;/* Current list entry */ | |
411 | ||
412 | ||
413 | while (src) | |
414 | { | |
415 | if ((current = malloc(sizeof(http_addrlist_t))) == NULL) | |
416 | { | |
417 | current = dst; | |
418 | ||
419 | while (current) | |
420 | { | |
421 | prev = current; | |
422 | current = current->next; | |
423 | ||
424 | free(prev); | |
425 | } | |
426 | ||
427 | return (NULL); | |
428 | } | |
429 | ||
430 | memcpy(current, src, sizeof(http_addrlist_t)); | |
431 | ||
432 | current->next = NULL; | |
433 | ||
434 | if (prev) | |
435 | prev->next = current; | |
436 | else | |
437 | dst = current; | |
438 | ||
db8b865d MS |
439 | prev = current; |
440 | src = src->next; | |
a469f8a5 MS |
441 | } |
442 | ||
443 | return (dst); | |
444 | } | |
445 | ||
446 | ||
ef416fc2 | 447 | /* |
448 | * 'httpAddrFreeList()' - Free an address list. | |
449 | * | |
8072030b | 450 | * @since CUPS 1.2/macOS 10.5@ |
ef416fc2 | 451 | */ |
452 | ||
453 | void | |
454 | httpAddrFreeList( | |
455 | http_addrlist_t *addrlist) /* I - Address list to free */ | |
456 | { | |
457 | http_addrlist_t *next; /* Next address in list */ | |
458 | ||
459 | ||
460 | /* | |
461 | * Free each address in the list... | |
462 | */ | |
463 | ||
464 | while (addrlist) | |
465 | { | |
466 | next = addrlist->next; | |
467 | ||
468 | free(addrlist); | |
469 | ||
470 | addrlist = next; | |
471 | } | |
472 | } | |
473 | ||
474 | ||
475 | /* | |
476 | * 'httpAddrGetList()' - Get a list of addresses for a hostname. | |
477 | * | |
8072030b | 478 | * @since CUPS 1.2/macOS 10.5@ |
ef416fc2 | 479 | */ |
480 | ||
481 | http_addrlist_t * /* O - List of addresses or NULL */ | |
482 | httpAddrGetList(const char *hostname, /* I - Hostname, IP address, or NULL for passive listen address */ | |
483 | int family, /* I - Address family or AF_UNSPEC */ | |
484 | const char *service) /* I - Service name or port number */ | |
485 | { | |
486 | http_addrlist_t *first, /* First address in list */ | |
487 | *addr, /* Current address in list */ | |
488 | *temp; /* New address */ | |
49d87452 MS |
489 | _cups_globals_t *cg = _cupsGlobals(); |
490 | /* Global data */ | |
ef416fc2 | 491 | |
492 | ||
493 | #ifdef DEBUG | |
ae71f5de MS |
494 | _cups_debug_printf("httpAddrGetList(hostname=\"%s\", family=AF_%s, " |
495 | "service=\"%s\")\n", | |
496 | hostname ? hostname : "(nil)", | |
497 | family == AF_UNSPEC ? "UNSPEC" : | |
ef416fc2 | 498 | # ifdef AF_LOCAL |
ae71f5de | 499 | family == AF_LOCAL ? "LOCAL" : |
ef416fc2 | 500 | # endif /* AF_LOCAL */ |
501 | # ifdef AF_INET6 | |
ae71f5de | 502 | family == AF_INET6 ? "INET6" : |
ef416fc2 | 503 | # endif /* AF_INET6 */ |
ae71f5de | 504 | family == AF_INET ? "INET" : "???", service); |
ef416fc2 | 505 | #endif /* DEBUG */ |
506 | ||
49d87452 MS |
507 | #ifdef HAVE_RES_INIT |
508 | /* | |
509 | * STR #2920: Initialize resolver after failure in cups-polld | |
510 | * | |
511 | * If the previous lookup failed, re-initialize the resolver to prevent | |
512 | * temporary network errors from persisting. This *should* be handled by | |
513 | * the resolver libraries, but apparently the glibc folks do not agree. | |
514 | * | |
515 | * We set a flag at the end of this function if we encounter an error that | |
516 | * requires reinitialization of the resolver functions. We then call | |
517 | * res_init() if the flag is set on the next call here or in httpAddrLookup(). | |
518 | */ | |
519 | ||
520 | if (cg->need_res_init) | |
521 | { | |
522 | res_init(); | |
523 | ||
524 | cg->need_res_init = 0; | |
525 | } | |
526 | #endif /* HAVE_RES_INIT */ | |
527 | ||
ef416fc2 | 528 | /* |
529 | * Lookup the address the best way we can... | |
530 | */ | |
531 | ||
532 | first = addr = NULL; | |
533 | ||
534 | #ifdef AF_LOCAL | |
535 | if (hostname && hostname[0] == '/') | |
536 | { | |
537 | /* | |
538 | * Domain socket address... | |
539 | */ | |
540 | ||
91c84a35 MS |
541 | if ((first = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t))) != NULL) |
542 | { | |
b1564bae | 543 | addr = first; |
91c84a35 MS |
544 | first->addr.un.sun_family = AF_LOCAL; |
545 | strlcpy(first->addr.un.sun_path, hostname, sizeof(first->addr.un.sun_path)); | |
546 | } | |
ef416fc2 | 547 | } |
548 | else | |
549 | #endif /* AF_LOCAL */ | |
88f9aafc | 550 | if (!hostname || _cups_strcasecmp(hostname, "localhost")) |
ef416fc2 | 551 | { |
552 | #ifdef HAVE_GETADDRINFO | |
553 | struct addrinfo hints, /* Address lookup hints */ | |
554 | *results, /* Address lookup results */ | |
555 | *current; /* Current result */ | |
82f97232 | 556 | char ipv6[64], /* IPv6 address */ |
ef416fc2 | 557 | *ipv6zone; /* Pointer to zone separator */ |
558 | int ipv6len; /* Length of IPv6 address */ | |
49d87452 MS |
559 | int error; /* getaddrinfo() error */ |
560 | ||
ef416fc2 | 561 | |
562 | /* | |
563 | * Lookup the address as needed... | |
564 | */ | |
565 | ||
566 | memset(&hints, 0, sizeof(hints)); | |
567 | hints.ai_family = family; | |
568 | hints.ai_flags = hostname ? 0 : AI_PASSIVE; | |
569 | hints.ai_socktype = SOCK_STREAM; | |
570 | ||
571 | if (hostname && *hostname == '[') | |
572 | { | |
573 | /* | |
574 | * Remove brackets from numeric IPv6 address... | |
575 | */ | |
576 | ||
577 | if (!strncmp(hostname, "[v1.", 4)) | |
578 | { | |
579 | /* | |
580 | * Copy the newer address format which supports link-local addresses... | |
581 | */ | |
582 | ||
583 | strlcpy(ipv6, hostname + 4, sizeof(ipv6)); | |
b86bc4cf | 584 | if ((ipv6len = (int)strlen(ipv6) - 1) >= 0 && ipv6[ipv6len] == ']') |
ef416fc2 | 585 | { |
586 | ipv6[ipv6len] = '\0'; | |
587 | hostname = ipv6; | |
588 | ||
589 | /* | |
590 | * Convert "+zone" in address to "%zone"... | |
591 | */ | |
592 | ||
593 | if ((ipv6zone = strrchr(ipv6, '+')) != NULL) | |
594 | *ipv6zone = '%'; | |
595 | } | |
596 | } | |
597 | else | |
598 | { | |
599 | /* | |
600 | * Copy the regular non-link-local IPv6 address... | |
601 | */ | |
602 | ||
603 | strlcpy(ipv6, hostname + 1, sizeof(ipv6)); | |
b86bc4cf | 604 | if ((ipv6len = (int)strlen(ipv6) - 1) >= 0 && ipv6[ipv6len] == ']') |
ef416fc2 | 605 | { |
606 | ipv6[ipv6len] = '\0'; | |
607 | hostname = ipv6; | |
608 | } | |
609 | } | |
610 | } | |
611 | ||
49d87452 | 612 | if ((error = getaddrinfo(hostname, service, &hints, &results)) == 0) |
ef416fc2 | 613 | { |
614 | /* | |
615 | * Copy the results to our own address list structure... | |
616 | */ | |
617 | ||
618 | for (current = results; current; current = current->ai_next) | |
619 | if (current->ai_family == AF_INET || current->ai_family == AF_INET6) | |
620 | { | |
621 | /* | |
622 | * Copy the address over... | |
623 | */ | |
624 | ||
625 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
626 | if (!temp) | |
627 | { | |
628 | httpAddrFreeList(first); | |
3416fe95 | 629 | freeaddrinfo(results); |
cb7f98ee | 630 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 631 | return (NULL); |
632 | } | |
633 | ||
634 | if (current->ai_family == AF_INET6) | |
635 | memcpy(&(temp->addr.ipv6), current->ai_addr, | |
636 | sizeof(temp->addr.ipv6)); | |
637 | else | |
638 | memcpy(&(temp->addr.ipv4), current->ai_addr, | |
639 | sizeof(temp->addr.ipv4)); | |
640 | ||
641 | /* | |
642 | * Append the address to the list... | |
643 | */ | |
644 | ||
645 | if (!first) | |
646 | first = temp; | |
647 | ||
648 | if (addr) | |
649 | addr->next = temp; | |
650 | ||
651 | addr = temp; | |
652 | } | |
653 | ||
654 | /* | |
655 | * Free the results from getaddrinfo()... | |
656 | */ | |
657 | ||
658 | freeaddrinfo(results); | |
659 | } | |
dcb445bc MS |
660 | else |
661 | { | |
662 | if (error == EAI_FAIL) | |
663 | cg->need_res_init = 1; | |
664 | ||
86206ccf MS |
665 | # ifdef _WIN32 /* Really, Microsoft?!? */ |
666 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gai_strerrorA(error), 0); | |
667 | # else | |
cb7f98ee | 668 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gai_strerror(error), 0); |
86206ccf | 669 | # endif /* _WIN32 */ |
dcb445bc | 670 | } |
49d87452 | 671 | |
ef416fc2 | 672 | #else |
673 | if (hostname) | |
674 | { | |
675 | int i; /* Looping vars */ | |
676 | unsigned ip[4]; /* IPv4 address components */ | |
677 | const char *ptr; /* Pointer into hostname */ | |
678 | struct hostent *host; /* Result of lookup */ | |
679 | struct servent *port; /* Port number for service */ | |
680 | int portnum; /* Port number */ | |
681 | ||
682 | ||
683 | /* | |
684 | * Lookup the service... | |
685 | */ | |
686 | ||
687 | if (!service) | |
688 | portnum = 0; | |
689 | else if (isdigit(*service & 255)) | |
690 | portnum = atoi(service); | |
691 | else if ((port = getservbyname(service, NULL)) != NULL) | |
692 | portnum = ntohs(port->s_port); | |
693 | else if (!strcmp(service, "http")) | |
694 | portnum = 80; | |
695 | else if (!strcmp(service, "https")) | |
696 | portnum = 443; | |
321d8d57 | 697 | else if (!strcmp(service, "ipp") || !strcmp(service, "ipps")) |
ef416fc2 | 698 | portnum = 631; |
699 | else if (!strcmp(service, "lpd")) | |
700 | portnum = 515; | |
701 | else if (!strcmp(service, "socket")) | |
702 | portnum = 9100; | |
703 | else | |
704 | return (NULL); | |
705 | ||
706 | /* | |
707 | * This code is needed because some operating systems have a | |
708 | * buggy implementation of gethostbyname() that does not support | |
709 | * IPv4 addresses. If the hostname string is an IPv4 address, then | |
710 | * sscanf() is used to extract the IPv4 components. We then pack | |
711 | * the components into an IPv4 address manually, since the | |
712 | * inet_aton() function is deprecated. We use the htonl() macro | |
713 | * to get the right byte order for the address. | |
714 | */ | |
715 | ||
716 | for (ptr = hostname; isdigit(*ptr & 255) || *ptr == '.'; ptr ++); | |
717 | ||
718 | if (!*ptr) | |
719 | { | |
720 | /* | |
721 | * We have an IPv4 address; break it up and create an IPv4 address... | |
722 | */ | |
723 | ||
724 | if (sscanf(hostname, "%u.%u.%u.%u", ip, ip + 1, ip + 2, ip + 3) == 4 && | |
725 | ip[0] <= 255 && ip[1] <= 255 && ip[2] <= 255 && ip[3] <= 255) | |
726 | { | |
727 | first = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
728 | if (!first) | |
729 | return (NULL); | |
730 | ||
731 | first->addr.ipv4.sin_family = AF_INET; | |
da003234 MS |
732 | first->addr.ipv4.sin_addr.s_addr = htonl((((((((unsigned)ip[0] << 8) | |
733 | (unsigned)ip[1]) << 8) | | |
734 | (unsigned)ip[2]) << 8) | | |
735 | (unsigned)ip[3])); | |
ef416fc2 | 736 | first->addr.ipv4.sin_port = htons(portnum); |
737 | } | |
738 | } | |
739 | else if ((host = gethostbyname(hostname)) != NULL && | |
740 | # ifdef AF_INET6 | |
741 | (host->h_addrtype == AF_INET || host->h_addrtype == AF_INET6)) | |
742 | # else | |
743 | host->h_addrtype == AF_INET) | |
744 | # endif /* AF_INET6 */ | |
745 | { | |
746 | for (i = 0; host->h_addr_list[i]; i ++) | |
747 | { | |
748 | /* | |
749 | * Copy the address over... | |
750 | */ | |
751 | ||
752 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
753 | if (!temp) | |
754 | { | |
755 | httpAddrFreeList(first); | |
756 | return (NULL); | |
757 | } | |
758 | ||
759 | # ifdef AF_INET6 | |
760 | if (host->h_addrtype == AF_INET6) | |
761 | { | |
d6ae789d | 762 | temp->addr.ipv6.sin6_family = AF_INET6; |
ed486911 | 763 | memcpy(&(temp->addr.ipv6.sin6_addr), host->h_addr_list[i], |
ef416fc2 | 764 | sizeof(temp->addr.ipv6)); |
765 | temp->addr.ipv6.sin6_port = htons(portnum); | |
766 | } | |
767 | else | |
768 | # endif /* AF_INET6 */ | |
769 | { | |
d6ae789d | 770 | temp->addr.ipv4.sin_family = AF_INET; |
ed486911 | 771 | memcpy(&(temp->addr.ipv4.sin_addr), host->h_addr_list[i], |
ef416fc2 | 772 | sizeof(temp->addr.ipv4)); |
773 | temp->addr.ipv4.sin_port = htons(portnum); | |
774 | } | |
775 | ||
776 | /* | |
777 | * Append the address to the list... | |
778 | */ | |
779 | ||
780 | if (!first) | |
781 | first = temp; | |
782 | ||
783 | if (addr) | |
784 | addr->next = temp; | |
785 | ||
786 | addr = temp; | |
787 | } | |
788 | } | |
dcb445bc MS |
789 | else |
790 | { | |
791 | if (h_errno == NO_RECOVERY) | |
792 | cg->need_res_init = 1; | |
793 | ||
cb7f98ee | 794 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, hstrerror(h_errno), 0); |
dcb445bc | 795 | } |
ef416fc2 | 796 | } |
797 | #endif /* HAVE_GETADDRINFO */ | |
798 | } | |
799 | ||
800 | /* | |
801 | * Detect some common errors and handle them sanely... | |
802 | */ | |
803 | ||
88f9aafc | 804 | if (!addr && (!hostname || !_cups_strcasecmp(hostname, "localhost"))) |
ef416fc2 | 805 | { |
806 | struct servent *port; /* Port number for service */ | |
807 | int portnum; /* Port number */ | |
808 | ||
809 | ||
810 | /* | |
811 | * Lookup the service... | |
812 | */ | |
813 | ||
814 | if (!service) | |
815 | portnum = 0; | |
816 | else if (isdigit(*service & 255)) | |
817 | portnum = atoi(service); | |
818 | else if ((port = getservbyname(service, NULL)) != NULL) | |
819 | portnum = ntohs(port->s_port); | |
820 | else if (!strcmp(service, "http")) | |
821 | portnum = 80; | |
822 | else if (!strcmp(service, "https")) | |
823 | portnum = 443; | |
321d8d57 | 824 | else if (!strcmp(service, "ipp") || !strcmp(service, "ipps")) |
ef416fc2 | 825 | portnum = 631; |
826 | else if (!strcmp(service, "lpd")) | |
827 | portnum = 515; | |
828 | else if (!strcmp(service, "socket")) | |
829 | portnum = 9100; | |
830 | else | |
321d8d57 MS |
831 | { |
832 | httpAddrFreeList(first); | |
dcb445bc | 833 | |
cb7f98ee | 834 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unknown service name."), 1); |
ef416fc2 | 835 | return (NULL); |
321d8d57 | 836 | } |
ef416fc2 | 837 | |
88f9aafc | 838 | if (hostname && !_cups_strcasecmp(hostname, "localhost")) |
ef416fc2 | 839 | { |
840 | /* | |
841 | * Unfortunately, some users ignore all of the warnings in the | |
842 | * /etc/hosts file and delete "localhost" from it. If we get here | |
843 | * then we were unable to resolve the name, so use the IPv6 and/or | |
844 | * IPv4 loopback interface addresses... | |
845 | */ | |
846 | ||
847 | #ifdef AF_INET6 | |
848 | if (family != AF_INET) | |
849 | { | |
850 | /* | |
851 | * Add [::1] to the address list... | |
852 | */ | |
853 | ||
854 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
855 | if (!temp) | |
856 | { | |
cb7f98ee | 857 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 858 | httpAddrFreeList(first); |
859 | return (NULL); | |
860 | } | |
861 | ||
862 | temp->addr.ipv6.sin6_family = AF_INET6; | |
863 | temp->addr.ipv6.sin6_port = htons(portnum); | |
19dc16f7 | 864 | # ifdef _WIN32 |
ef416fc2 | 865 | temp->addr.ipv6.sin6_addr.u.Byte[15] = 1; |
866 | # else | |
867 | temp->addr.ipv6.sin6_addr.s6_addr32[3] = htonl(1); | |
19dc16f7 | 868 | # endif /* _WIN32 */ |
ef416fc2 | 869 | |
ed486911 | 870 | if (!first) |
871 | first = temp; | |
872 | ||
ef416fc2 | 873 | addr = temp; |
874 | } | |
875 | ||
876 | if (family != AF_INET6) | |
877 | #endif /* AF_INET6 */ | |
878 | { | |
879 | /* | |
880 | * Add 127.0.0.1 to the address list... | |
881 | */ | |
882 | ||
883 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
884 | if (!temp) | |
885 | { | |
cb7f98ee | 886 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 887 | httpAddrFreeList(first); |
888 | return (NULL); | |
889 | } | |
890 | ||
891 | temp->addr.ipv4.sin_family = AF_INET; | |
892 | temp->addr.ipv4.sin_port = htons(portnum); | |
893 | temp->addr.ipv4.sin_addr.s_addr = htonl(0x7f000001); | |
894 | ||
ed486911 | 895 | if (!first) |
896 | first = temp; | |
897 | ||
ef416fc2 | 898 | if (addr) |
899 | addr->next = temp; | |
ef416fc2 | 900 | } |
901 | } | |
902 | else if (!hostname) | |
903 | { | |
904 | /* | |
905 | * Provide one or more passive listening addresses... | |
906 | */ | |
907 | ||
908 | #ifdef AF_INET6 | |
909 | if (family != AF_INET) | |
910 | { | |
911 | /* | |
912 | * Add [::] to the address list... | |
913 | */ | |
914 | ||
915 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
916 | if (!temp) | |
917 | { | |
cb7f98ee | 918 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 919 | httpAddrFreeList(first); |
920 | return (NULL); | |
921 | } | |
922 | ||
923 | temp->addr.ipv6.sin6_family = AF_INET6; | |
924 | temp->addr.ipv6.sin6_port = htons(portnum); | |
925 | ||
ed486911 | 926 | if (!first) |
927 | first = temp; | |
928 | ||
ef416fc2 | 929 | addr = temp; |
930 | } | |
931 | ||
932 | if (family != AF_INET6) | |
933 | #endif /* AF_INET6 */ | |
934 | { | |
935 | /* | |
936 | * Add 0.0.0.0 to the address list... | |
937 | */ | |
938 | ||
939 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
940 | if (!temp) | |
941 | { | |
cb7f98ee | 942 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 943 | httpAddrFreeList(first); |
944 | return (NULL); | |
945 | } | |
946 | ||
947 | temp->addr.ipv4.sin_family = AF_INET; | |
948 | temp->addr.ipv4.sin_port = htons(portnum); | |
949 | ||
ed486911 | 950 | if (!first) |
951 | first = temp; | |
952 | ||
ef416fc2 | 953 | if (addr) |
954 | addr->next = temp; | |
ef416fc2 | 955 | } |
956 | } | |
957 | } | |
958 | ||
959 | /* | |
960 | * Return the address list... | |
961 | */ | |
962 | ||
963 | return (first); | |
964 | } |