]>
Commit | Line | Data |
---|---|---|
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 MS |
240 | if (!addrlist && nfds == 0) |
241 | break; | |
242 | ||
6fb588e0 MS |
243 | /* |
244 | * See if we can connect to any of the addresses so far... | |
245 | */ | |
d5cc05c9 MS |
246 | |
247 | #ifdef O_NONBLOCK | |
6fb588e0 | 248 | DEBUG_puts("1httpAddrConnect2: Finishing async connect()"); |
d5cc05c9 | 249 | |
d5cc05c9 MS |
250 | do |
251 | { | |
252 | if (cancel && *cancel) | |
12f89d24 | 253 | { |
d5cc05c9 MS |
254 | /* |
255 | * Close this socket and return... | |
256 | */ | |
dcb445bc | 257 | |
d5cc05c9 | 258 | DEBUG_puts("1httpAddrConnect2: Canceled connect()"); |
12f89d24 | 259 | |
d5cc05c9 MS |
260 | while (nfds > 0) |
261 | { | |
262 | nfds --; | |
263 | httpAddrClose(NULL, fds[nfds]); | |
264 | } | |
dcb445bc | 265 | |
d5cc05c9 | 266 | *sock = -1; |
dcb445bc | 267 | |
d5cc05c9 MS |
268 | return (NULL); |
269 | } | |
12f89d24 MS |
270 | |
271 | # ifdef HAVE_POLL | |
d5cc05c9 MS |
272 | for (i = 0; i < nfds; i ++) |
273 | { | |
6fb588e0 MS |
274 | pfds[i].fd = fds[i]; |
275 | pfds[i].events = POLLIN | POLLOUT; | |
d5cc05c9 | 276 | } |
12f89d24 | 277 | |
6fb588e0 | 278 | result = poll(pfds, (nfds_t)nfds, addrlist ? 100 : remaining > 250 ? 250 : remaining); |
12f89d24 | 279 | |
d5cc05c9 | 280 | DEBUG_printf(("1httpAddrConnect2: poll() returned %d (%d)", result, errno)); |
dcb445bc | 281 | |
12f89d24 | 282 | # else |
d5cc05c9 MS |
283 | FD_ZERO(&input_set); |
284 | for (i = 0; i < nfds; i ++) | |
6fb588e0 | 285 | FD_SET(fds[i], &input_set); |
d5cc05c9 | 286 | output_set = input_set; |
4c3f8a9b | 287 | error_set = input_set; |
dcb445bc | 288 | |
d5cc05c9 | 289 | timeout.tv_sec = 0; |
6fb588e0 | 290 | timeout.tv_usec = (addrlist ? 100 : remaining > 250 ? 250 : remaining) * 1000; |
dcb445bc | 291 | |
4c3f8a9b | 292 | result = select(max_fd + 1, &input_set, &output_set, &error_set, &timeout); |
12f89d24 | 293 | |
d5cc05c9 | 294 | DEBUG_printf(("1httpAddrConnect2: select() returned %d (%d)", result, errno)); |
12f89d24 | 295 | # endif /* HAVE_POLL */ |
d5cc05c9 | 296 | } |
19dc16f7 | 297 | # ifdef _WIN32 |
d5cc05c9 | 298 | while (result < 0 && (WSAGetLastError() == WSAEINTR || WSAGetLastError() == WSAEWOULDBLOCK)); |
12f89d24 | 299 | # else |
d5cc05c9 | 300 | while (result < 0 && (errno == EINTR || errno == EAGAIN)); |
19dc16f7 | 301 | # endif /* _WIN32 */ |
dcb445bc | 302 | |
d5cc05c9 MS |
303 | if (result > 0) |
304 | { | |
0ca77b3e MS |
305 | http_addrlist_t *connaddr = NULL; /* Connected address, if any */ |
306 | ||
d5cc05c9 MS |
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 |
c7505715 | 313 | if (FD_ISSET(fds[i], &input_set) && !FD_ISSET(fds[i], &error_set)) |
d5cc05c9 | 314 | # endif /* HAVE_POLL */ |
6fb588e0 MS |
315 | { |
316 | *sock = fds[i]; | |
0ca77b3e | 317 | connaddr = addrs[i]; |
6fb588e0 MS |
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 */ |
7b0a28e3 MS |
324 | |
325 | break; | |
d5cc05c9 | 326 | } |
0ca77b3e MS |
327 | # ifdef HAVE_POLL |
328 | else if (pfds[i].revents & (POLLERR | POLLHUP)) | |
329 | # else | |
c7505715 | 330 | else if (FD_ISSET(fds[i], &error_set)) |
0ca77b3e MS |
331 | # endif /* HAVE_POLL */ |
332 | { | |
333 | /* | |
334 | * Error on socket, remove from the "pool"... | |
335 | */ | |
336 | ||
d5cc05c9 | 337 | httpAddrClose(NULL, fds[i]); |
0ca77b3e MS |
338 | nfds --; |
339 | if (i < nfds) | |
340 | { | |
341 | memmove(fds + i, fds + i + 1, (size_t)(nfds - i) * (sizeof(fds[0]))); | |
342 | memmove(addrs + i, addrs + i + 1, (size_t)(nfds - i) * (sizeof(addrs[0]))); | |
343 | } | |
344 | i --; | |
345 | } | |
dcb445bc | 346 | } |
d5cc05c9 | 347 | |
0ca77b3e | 348 | if (connaddr) |
7b0a28e3 MS |
349 | { |
350 | /* | |
351 | * Connected on one address, close all of the other sockets we have so | |
352 | * far and return... | |
353 | */ | |
354 | ||
355 | for (j = 0; j < i; j ++) | |
356 | httpAddrClose(NULL, fds[j]); | |
357 | ||
358 | for (j ++; j < nfds; j ++) | |
359 | httpAddrClose(NULL, fds[j]); | |
360 | ||
0ca77b3e | 361 | return (connaddr); |
7b0a28e3 | 362 | } |
1ff0402e | 363 | } |
dcb445bc | 364 | #endif /* O_NONBLOCK */ |
1ff0402e | 365 | |
6fb588e0 MS |
366 | if (addrlist) |
367 | remaining -= 100; | |
368 | else | |
369 | remaining -= 250; | |
370 | } | |
371 | ||
d5cc05c9 MS |
372 | while (nfds > 0) |
373 | { | |
374 | nfds --; | |
375 | httpAddrClose(NULL, fds[nfds]); | |
ef416fc2 | 376 | } |
377 | ||
19dc16f7 | 378 | #ifdef _WIN32 |
d5cc05c9 | 379 | _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, "Connection failed", 0); |
12f89d24 | 380 | #else |
d5cc05c9 | 381 | _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, strerror(errno), 0); |
19dc16f7 | 382 | #endif /* _WIN32 */ |
7cf5915e | 383 | |
d5cc05c9 | 384 | return (NULL); |
ef416fc2 | 385 | } |
386 | ||
387 | ||
a469f8a5 MS |
388 | /* |
389 | * 'httpAddrCopyList()' - Copy an address list. | |
390 | * | |
8072030b | 391 | * @since CUPS 1.7/macOS 10.9@ |
a469f8a5 MS |
392 | */ |
393 | ||
394 | http_addrlist_t * /* O - New address list or @code NULL@ on error */ | |
395 | httpAddrCopyList( | |
396 | http_addrlist_t *src) /* I - Source address list */ | |
397 | { | |
398 | http_addrlist_t *dst = NULL, /* First list entry */ | |
399 | *prev = NULL, /* Previous list entry */ | |
400 | *current = NULL;/* Current list entry */ | |
401 | ||
402 | ||
403 | while (src) | |
404 | { | |
405 | if ((current = malloc(sizeof(http_addrlist_t))) == NULL) | |
406 | { | |
407 | current = dst; | |
408 | ||
409 | while (current) | |
410 | { | |
411 | prev = current; | |
412 | current = current->next; | |
413 | ||
414 | free(prev); | |
415 | } | |
416 | ||
417 | return (NULL); | |
418 | } | |
419 | ||
420 | memcpy(current, src, sizeof(http_addrlist_t)); | |
421 | ||
422 | current->next = NULL; | |
423 | ||
424 | if (prev) | |
425 | prev->next = current; | |
426 | else | |
427 | dst = current; | |
428 | ||
db8b865d MS |
429 | prev = current; |
430 | src = src->next; | |
a469f8a5 MS |
431 | } |
432 | ||
433 | return (dst); | |
434 | } | |
435 | ||
436 | ||
ef416fc2 | 437 | /* |
438 | * 'httpAddrFreeList()' - Free an address list. | |
439 | * | |
8072030b | 440 | * @since CUPS 1.2/macOS 10.5@ |
ef416fc2 | 441 | */ |
442 | ||
443 | void | |
444 | httpAddrFreeList( | |
445 | http_addrlist_t *addrlist) /* I - Address list to free */ | |
446 | { | |
447 | http_addrlist_t *next; /* Next address in list */ | |
448 | ||
449 | ||
450 | /* | |
451 | * Free each address in the list... | |
452 | */ | |
453 | ||
454 | while (addrlist) | |
455 | { | |
456 | next = addrlist->next; | |
457 | ||
458 | free(addrlist); | |
459 | ||
460 | addrlist = next; | |
461 | } | |
462 | } | |
463 | ||
464 | ||
465 | /* | |
466 | * 'httpAddrGetList()' - Get a list of addresses for a hostname. | |
467 | * | |
8072030b | 468 | * @since CUPS 1.2/macOS 10.5@ |
ef416fc2 | 469 | */ |
470 | ||
471 | http_addrlist_t * /* O - List of addresses or NULL */ | |
472 | httpAddrGetList(const char *hostname, /* I - Hostname, IP address, or NULL for passive listen address */ | |
473 | int family, /* I - Address family or AF_UNSPEC */ | |
474 | const char *service) /* I - Service name or port number */ | |
475 | { | |
476 | http_addrlist_t *first, /* First address in list */ | |
477 | *addr, /* Current address in list */ | |
478 | *temp; /* New address */ | |
49d87452 MS |
479 | _cups_globals_t *cg = _cupsGlobals(); |
480 | /* Global data */ | |
ef416fc2 | 481 | |
482 | ||
483 | #ifdef DEBUG | |
ae71f5de MS |
484 | _cups_debug_printf("httpAddrGetList(hostname=\"%s\", family=AF_%s, " |
485 | "service=\"%s\")\n", | |
486 | hostname ? hostname : "(nil)", | |
487 | family == AF_UNSPEC ? "UNSPEC" : | |
ef416fc2 | 488 | # ifdef AF_LOCAL |
ae71f5de | 489 | family == AF_LOCAL ? "LOCAL" : |
ef416fc2 | 490 | # endif /* AF_LOCAL */ |
491 | # ifdef AF_INET6 | |
ae71f5de | 492 | family == AF_INET6 ? "INET6" : |
ef416fc2 | 493 | # endif /* AF_INET6 */ |
ae71f5de | 494 | family == AF_INET ? "INET" : "???", service); |
ef416fc2 | 495 | #endif /* DEBUG */ |
496 | ||
49d87452 MS |
497 | #ifdef HAVE_RES_INIT |
498 | /* | |
499 | * STR #2920: Initialize resolver after failure in cups-polld | |
500 | * | |
501 | * If the previous lookup failed, re-initialize the resolver to prevent | |
502 | * temporary network errors from persisting. This *should* be handled by | |
503 | * the resolver libraries, but apparently the glibc folks do not agree. | |
504 | * | |
505 | * We set a flag at the end of this function if we encounter an error that | |
506 | * requires reinitialization of the resolver functions. We then call | |
507 | * res_init() if the flag is set on the next call here or in httpAddrLookup(). | |
508 | */ | |
509 | ||
510 | if (cg->need_res_init) | |
511 | { | |
512 | res_init(); | |
513 | ||
514 | cg->need_res_init = 0; | |
515 | } | |
516 | #endif /* HAVE_RES_INIT */ | |
517 | ||
ef416fc2 | 518 | /* |
519 | * Lookup the address the best way we can... | |
520 | */ | |
521 | ||
522 | first = addr = NULL; | |
523 | ||
524 | #ifdef AF_LOCAL | |
525 | if (hostname && hostname[0] == '/') | |
526 | { | |
527 | /* | |
528 | * Domain socket address... | |
529 | */ | |
530 | ||
91c84a35 MS |
531 | if ((first = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t))) != NULL) |
532 | { | |
b1564bae | 533 | addr = first; |
91c84a35 MS |
534 | first->addr.un.sun_family = AF_LOCAL; |
535 | strlcpy(first->addr.un.sun_path, hostname, sizeof(first->addr.un.sun_path)); | |
536 | } | |
ef416fc2 | 537 | } |
538 | else | |
539 | #endif /* AF_LOCAL */ | |
88f9aafc | 540 | if (!hostname || _cups_strcasecmp(hostname, "localhost")) |
ef416fc2 | 541 | { |
542 | #ifdef HAVE_GETADDRINFO | |
543 | struct addrinfo hints, /* Address lookup hints */ | |
544 | *results, /* Address lookup results */ | |
545 | *current; /* Current result */ | |
82f97232 | 546 | char ipv6[64], /* IPv6 address */ |
ef416fc2 | 547 | *ipv6zone; /* Pointer to zone separator */ |
548 | int ipv6len; /* Length of IPv6 address */ | |
49d87452 MS |
549 | int error; /* getaddrinfo() error */ |
550 | ||
ef416fc2 | 551 | |
552 | /* | |
553 | * Lookup the address as needed... | |
554 | */ | |
555 | ||
556 | memset(&hints, 0, sizeof(hints)); | |
557 | hints.ai_family = family; | |
558 | hints.ai_flags = hostname ? 0 : AI_PASSIVE; | |
559 | hints.ai_socktype = SOCK_STREAM; | |
560 | ||
561 | if (hostname && *hostname == '[') | |
562 | { | |
563 | /* | |
564 | * Remove brackets from numeric IPv6 address... | |
565 | */ | |
566 | ||
567 | if (!strncmp(hostname, "[v1.", 4)) | |
568 | { | |
569 | /* | |
570 | * Copy the newer address format which supports link-local addresses... | |
571 | */ | |
572 | ||
573 | strlcpy(ipv6, hostname + 4, sizeof(ipv6)); | |
b86bc4cf | 574 | if ((ipv6len = (int)strlen(ipv6) - 1) >= 0 && ipv6[ipv6len] == ']') |
ef416fc2 | 575 | { |
576 | ipv6[ipv6len] = '\0'; | |
577 | hostname = ipv6; | |
578 | ||
579 | /* | |
580 | * Convert "+zone" in address to "%zone"... | |
581 | */ | |
582 | ||
583 | if ((ipv6zone = strrchr(ipv6, '+')) != NULL) | |
584 | *ipv6zone = '%'; | |
585 | } | |
586 | } | |
587 | else | |
588 | { | |
589 | /* | |
590 | * Copy the regular non-link-local IPv6 address... | |
591 | */ | |
592 | ||
593 | strlcpy(ipv6, hostname + 1, sizeof(ipv6)); | |
b86bc4cf | 594 | if ((ipv6len = (int)strlen(ipv6) - 1) >= 0 && ipv6[ipv6len] == ']') |
ef416fc2 | 595 | { |
596 | ipv6[ipv6len] = '\0'; | |
597 | hostname = ipv6; | |
598 | } | |
599 | } | |
600 | } | |
601 | ||
49d87452 | 602 | if ((error = getaddrinfo(hostname, service, &hints, &results)) == 0) |
ef416fc2 | 603 | { |
604 | /* | |
605 | * Copy the results to our own address list structure... | |
606 | */ | |
607 | ||
608 | for (current = results; current; current = current->ai_next) | |
609 | if (current->ai_family == AF_INET || current->ai_family == AF_INET6) | |
610 | { | |
611 | /* | |
612 | * Copy the address over... | |
613 | */ | |
614 | ||
615 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
616 | if (!temp) | |
617 | { | |
618 | httpAddrFreeList(first); | |
3416fe95 | 619 | freeaddrinfo(results); |
cb7f98ee | 620 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 621 | return (NULL); |
622 | } | |
623 | ||
624 | if (current->ai_family == AF_INET6) | |
625 | memcpy(&(temp->addr.ipv6), current->ai_addr, | |
626 | sizeof(temp->addr.ipv6)); | |
627 | else | |
628 | memcpy(&(temp->addr.ipv4), current->ai_addr, | |
629 | sizeof(temp->addr.ipv4)); | |
630 | ||
631 | /* | |
632 | * Append the address to the list... | |
633 | */ | |
634 | ||
635 | if (!first) | |
636 | first = temp; | |
637 | ||
638 | if (addr) | |
639 | addr->next = temp; | |
640 | ||
641 | addr = temp; | |
642 | } | |
643 | ||
644 | /* | |
645 | * Free the results from getaddrinfo()... | |
646 | */ | |
647 | ||
648 | freeaddrinfo(results); | |
649 | } | |
dcb445bc MS |
650 | else |
651 | { | |
652 | if (error == EAI_FAIL) | |
653 | cg->need_res_init = 1; | |
654 | ||
86206ccf MS |
655 | # ifdef _WIN32 /* Really, Microsoft?!? */ |
656 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gai_strerrorA(error), 0); | |
657 | # else | |
cb7f98ee | 658 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gai_strerror(error), 0); |
86206ccf | 659 | # endif /* _WIN32 */ |
dcb445bc | 660 | } |
49d87452 | 661 | |
ef416fc2 | 662 | #else |
663 | if (hostname) | |
664 | { | |
665 | int i; /* Looping vars */ | |
666 | unsigned ip[4]; /* IPv4 address components */ | |
667 | const char *ptr; /* Pointer into hostname */ | |
668 | struct hostent *host; /* Result of lookup */ | |
669 | struct servent *port; /* Port number for service */ | |
670 | int portnum; /* Port number */ | |
671 | ||
672 | ||
673 | /* | |
674 | * Lookup the service... | |
675 | */ | |
676 | ||
677 | if (!service) | |
678 | portnum = 0; | |
679 | else if (isdigit(*service & 255)) | |
680 | portnum = atoi(service); | |
681 | else if ((port = getservbyname(service, NULL)) != NULL) | |
682 | portnum = ntohs(port->s_port); | |
683 | else if (!strcmp(service, "http")) | |
684 | portnum = 80; | |
685 | else if (!strcmp(service, "https")) | |
686 | portnum = 443; | |
321d8d57 | 687 | else if (!strcmp(service, "ipp") || !strcmp(service, "ipps")) |
ef416fc2 | 688 | portnum = 631; |
689 | else if (!strcmp(service, "lpd")) | |
690 | portnum = 515; | |
691 | else if (!strcmp(service, "socket")) | |
692 | portnum = 9100; | |
693 | else | |
694 | return (NULL); | |
695 | ||
696 | /* | |
697 | * This code is needed because some operating systems have a | |
698 | * buggy implementation of gethostbyname() that does not support | |
699 | * IPv4 addresses. If the hostname string is an IPv4 address, then | |
700 | * sscanf() is used to extract the IPv4 components. We then pack | |
701 | * the components into an IPv4 address manually, since the | |
702 | * inet_aton() function is deprecated. We use the htonl() macro | |
703 | * to get the right byte order for the address. | |
704 | */ | |
705 | ||
706 | for (ptr = hostname; isdigit(*ptr & 255) || *ptr == '.'; ptr ++); | |
707 | ||
708 | if (!*ptr) | |
709 | { | |
710 | /* | |
711 | * We have an IPv4 address; break it up and create an IPv4 address... | |
712 | */ | |
713 | ||
714 | if (sscanf(hostname, "%u.%u.%u.%u", ip, ip + 1, ip + 2, ip + 3) == 4 && | |
715 | ip[0] <= 255 && ip[1] <= 255 && ip[2] <= 255 && ip[3] <= 255) | |
716 | { | |
717 | first = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
718 | if (!first) | |
719 | return (NULL); | |
720 | ||
721 | first->addr.ipv4.sin_family = AF_INET; | |
da003234 MS |
722 | first->addr.ipv4.sin_addr.s_addr = htonl((((((((unsigned)ip[0] << 8) | |
723 | (unsigned)ip[1]) << 8) | | |
724 | (unsigned)ip[2]) << 8) | | |
725 | (unsigned)ip[3])); | |
ef416fc2 | 726 | first->addr.ipv4.sin_port = htons(portnum); |
727 | } | |
728 | } | |
729 | else if ((host = gethostbyname(hostname)) != NULL && | |
730 | # ifdef AF_INET6 | |
731 | (host->h_addrtype == AF_INET || host->h_addrtype == AF_INET6)) | |
732 | # else | |
733 | host->h_addrtype == AF_INET) | |
734 | # endif /* AF_INET6 */ | |
735 | { | |
736 | for (i = 0; host->h_addr_list[i]; i ++) | |
737 | { | |
738 | /* | |
739 | * Copy the address over... | |
740 | */ | |
741 | ||
742 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
743 | if (!temp) | |
744 | { | |
745 | httpAddrFreeList(first); | |
746 | return (NULL); | |
747 | } | |
748 | ||
749 | # ifdef AF_INET6 | |
750 | if (host->h_addrtype == AF_INET6) | |
751 | { | |
d6ae789d | 752 | temp->addr.ipv6.sin6_family = AF_INET6; |
ed486911 | 753 | memcpy(&(temp->addr.ipv6.sin6_addr), host->h_addr_list[i], |
ef416fc2 | 754 | sizeof(temp->addr.ipv6)); |
755 | temp->addr.ipv6.sin6_port = htons(portnum); | |
756 | } | |
757 | else | |
758 | # endif /* AF_INET6 */ | |
759 | { | |
d6ae789d | 760 | temp->addr.ipv4.sin_family = AF_INET; |
ed486911 | 761 | memcpy(&(temp->addr.ipv4.sin_addr), host->h_addr_list[i], |
ef416fc2 | 762 | sizeof(temp->addr.ipv4)); |
763 | temp->addr.ipv4.sin_port = htons(portnum); | |
764 | } | |
765 | ||
766 | /* | |
767 | * Append the address to the list... | |
768 | */ | |
769 | ||
770 | if (!first) | |
771 | first = temp; | |
772 | ||
773 | if (addr) | |
774 | addr->next = temp; | |
775 | ||
776 | addr = temp; | |
777 | } | |
778 | } | |
dcb445bc MS |
779 | else |
780 | { | |
781 | if (h_errno == NO_RECOVERY) | |
782 | cg->need_res_init = 1; | |
783 | ||
cb7f98ee | 784 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, hstrerror(h_errno), 0); |
dcb445bc | 785 | } |
ef416fc2 | 786 | } |
787 | #endif /* HAVE_GETADDRINFO */ | |
788 | } | |
789 | ||
790 | /* | |
791 | * Detect some common errors and handle them sanely... | |
792 | */ | |
793 | ||
88f9aafc | 794 | if (!addr && (!hostname || !_cups_strcasecmp(hostname, "localhost"))) |
ef416fc2 | 795 | { |
796 | struct servent *port; /* Port number for service */ | |
797 | int portnum; /* Port number */ | |
798 | ||
799 | ||
800 | /* | |
801 | * Lookup the service... | |
802 | */ | |
803 | ||
804 | if (!service) | |
805 | portnum = 0; | |
806 | else if (isdigit(*service & 255)) | |
807 | portnum = atoi(service); | |
808 | else if ((port = getservbyname(service, NULL)) != NULL) | |
809 | portnum = ntohs(port->s_port); | |
810 | else if (!strcmp(service, "http")) | |
811 | portnum = 80; | |
812 | else if (!strcmp(service, "https")) | |
813 | portnum = 443; | |
321d8d57 | 814 | else if (!strcmp(service, "ipp") || !strcmp(service, "ipps")) |
ef416fc2 | 815 | portnum = 631; |
816 | else if (!strcmp(service, "lpd")) | |
817 | portnum = 515; | |
818 | else if (!strcmp(service, "socket")) | |
819 | portnum = 9100; | |
820 | else | |
321d8d57 MS |
821 | { |
822 | httpAddrFreeList(first); | |
dcb445bc | 823 | |
cb7f98ee | 824 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unknown service name."), 1); |
ef416fc2 | 825 | return (NULL); |
321d8d57 | 826 | } |
ef416fc2 | 827 | |
88f9aafc | 828 | if (hostname && !_cups_strcasecmp(hostname, "localhost")) |
ef416fc2 | 829 | { |
830 | /* | |
831 | * Unfortunately, some users ignore all of the warnings in the | |
832 | * /etc/hosts file and delete "localhost" from it. If we get here | |
833 | * then we were unable to resolve the name, so use the IPv6 and/or | |
834 | * IPv4 loopback interface addresses... | |
835 | */ | |
836 | ||
837 | #ifdef AF_INET6 | |
838 | if (family != AF_INET) | |
839 | { | |
840 | /* | |
841 | * Add [::1] to the address list... | |
842 | */ | |
843 | ||
844 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
845 | if (!temp) | |
846 | { | |
cb7f98ee | 847 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 848 | httpAddrFreeList(first); |
849 | return (NULL); | |
850 | } | |
851 | ||
852 | temp->addr.ipv6.sin6_family = AF_INET6; | |
853 | temp->addr.ipv6.sin6_port = htons(portnum); | |
19dc16f7 | 854 | # ifdef _WIN32 |
ef416fc2 | 855 | temp->addr.ipv6.sin6_addr.u.Byte[15] = 1; |
856 | # else | |
857 | temp->addr.ipv6.sin6_addr.s6_addr32[3] = htonl(1); | |
19dc16f7 | 858 | # endif /* _WIN32 */ |
ef416fc2 | 859 | |
ed486911 | 860 | if (!first) |
861 | first = temp; | |
862 | ||
ef416fc2 | 863 | addr = temp; |
864 | } | |
865 | ||
866 | if (family != AF_INET6) | |
867 | #endif /* AF_INET6 */ | |
868 | { | |
869 | /* | |
870 | * Add 127.0.0.1 to the address list... | |
871 | */ | |
872 | ||
873 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
874 | if (!temp) | |
875 | { | |
cb7f98ee | 876 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 877 | httpAddrFreeList(first); |
878 | return (NULL); | |
879 | } | |
880 | ||
881 | temp->addr.ipv4.sin_family = AF_INET; | |
882 | temp->addr.ipv4.sin_port = htons(portnum); | |
883 | temp->addr.ipv4.sin_addr.s_addr = htonl(0x7f000001); | |
884 | ||
ed486911 | 885 | if (!first) |
886 | first = temp; | |
887 | ||
ef416fc2 | 888 | if (addr) |
889 | addr->next = temp; | |
ef416fc2 | 890 | } |
891 | } | |
892 | else if (!hostname) | |
893 | { | |
894 | /* | |
895 | * Provide one or more passive listening addresses... | |
896 | */ | |
897 | ||
898 | #ifdef AF_INET6 | |
899 | if (family != AF_INET) | |
900 | { | |
901 | /* | |
902 | * Add [::] to the address list... | |
903 | */ | |
904 | ||
905 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
906 | if (!temp) | |
907 | { | |
cb7f98ee | 908 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 909 | httpAddrFreeList(first); |
910 | return (NULL); | |
911 | } | |
912 | ||
913 | temp->addr.ipv6.sin6_family = AF_INET6; | |
914 | temp->addr.ipv6.sin6_port = htons(portnum); | |
915 | ||
ed486911 | 916 | if (!first) |
917 | first = temp; | |
918 | ||
ef416fc2 | 919 | addr = temp; |
920 | } | |
921 | ||
922 | if (family != AF_INET6) | |
923 | #endif /* AF_INET6 */ | |
924 | { | |
925 | /* | |
926 | * Add 0.0.0.0 to the address list... | |
927 | */ | |
928 | ||
929 | temp = (http_addrlist_t *)calloc(1, sizeof(http_addrlist_t)); | |
930 | if (!temp) | |
931 | { | |
cb7f98ee | 932 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
ef416fc2 | 933 | httpAddrFreeList(first); |
934 | return (NULL); | |
935 | } | |
936 | ||
937 | temp->addr.ipv4.sin_family = AF_INET; | |
938 | temp->addr.ipv4.sin_port = htons(portnum); | |
939 | ||
ed486911 | 940 | if (!first) |
941 | first = temp; | |
942 | ||
ef416fc2 | 943 | if (addr) |
944 | addr->next = temp; | |
ef416fc2 | 945 | } |
946 | } | |
947 | } | |
948 | ||
949 | /* | |
950 | * Return the address list... | |
951 | */ | |
952 | ||
953 | return (first); | |
954 | } |