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1 | /* | |
2 | * HTTP address routines for CUPS. | |
3 | * | |
4 | * Copyright 2007-2014 by Apple Inc. | |
5 | * Copyright 1997-2006 by Easy Software Products, all rights reserved. | |
6 | * | |
7 | * Licensed under Apache License v2.0. See the file "LICENSE" for more information. | |
8 | */ | |
9 | ||
10 | /* | |
11 | * Include necessary headers... | |
12 | */ | |
13 | ||
14 | #include "cups-private.h" | |
15 | #include <sys/stat.h> | |
16 | #ifdef HAVE_RESOLV_H | |
17 | # include <resolv.h> | |
18 | #endif /* HAVE_RESOLV_H */ | |
19 | #ifdef __APPLE__ | |
20 | # include <CoreFoundation/CoreFoundation.h> | |
21 | # include <SystemConfiguration/SystemConfiguration.h> | |
22 | #endif /* __APPLE__ */ | |
23 | ||
24 | ||
25 | /* | |
26 | * 'httpAddrAny()' - Check for the "any" address. | |
27 | * | |
28 | * @since CUPS 1.2/macOS 10.5@ | |
29 | */ | |
30 | ||
31 | int /* O - 1 if "any", 0 otherwise */ | |
32 | httpAddrAny(const http_addr_t *addr) /* I - Address to check */ | |
33 | { | |
34 | if (!addr) | |
35 | return (0); | |
36 | ||
37 | #ifdef AF_INET6 | |
38 | if (addr->addr.sa_family == AF_INET6 && | |
39 | IN6_IS_ADDR_UNSPECIFIED(&(addr->ipv6.sin6_addr))) | |
40 | return (1); | |
41 | #endif /* AF_INET6 */ | |
42 | ||
43 | if (addr->addr.sa_family == AF_INET && | |
44 | ntohl(addr->ipv4.sin_addr.s_addr) == 0x00000000) | |
45 | return (1); | |
46 | ||
47 | return (0); | |
48 | } | |
49 | ||
50 | ||
51 | /* | |
52 | * 'httpAddrClose()' - Close a socket created by @link httpAddrConnect@ or | |
53 | * @link httpAddrListen@. | |
54 | * | |
55 | * Pass @code NULL@ for sockets created with @link httpAddrConnect2@ and the | |
56 | * listen address for sockets created with @link httpAddrListen@. This function | |
57 | * ensures that domain sockets are removed when closed. | |
58 | * | |
59 | * @since CUPS 2.0/OS 10.10@ | |
60 | */ | |
61 | ||
62 | int /* O - 0 on success, -1 on failure */ | |
63 | httpAddrClose(http_addr_t *addr, /* I - Listen address or @code NULL@ */ | |
64 | int fd) /* I - Socket file descriptor */ | |
65 | { | |
66 | #ifdef WIN32 | |
67 | if (closesocket(fd)) | |
68 | #else | |
69 | if (close(fd)) | |
70 | #endif /* WIN32 */ | |
71 | return (-1); | |
72 | ||
73 | #ifdef AF_LOCAL | |
74 | if (addr && addr->addr.sa_family == AF_LOCAL) | |
75 | return (unlink(addr->un.sun_path)); | |
76 | #endif /* AF_LOCAL */ | |
77 | ||
78 | return (0); | |
79 | } | |
80 | ||
81 | ||
82 | /* | |
83 | * 'httpAddrEqual()' - Compare two addresses. | |
84 | * | |
85 | * @since CUPS 1.2/macOS 10.5@ | |
86 | */ | |
87 | ||
88 | int /* O - 1 if equal, 0 if not */ | |
89 | httpAddrEqual(const http_addr_t *addr1, /* I - First address */ | |
90 | const http_addr_t *addr2) /* I - Second address */ | |
91 | { | |
92 | if (!addr1 && !addr2) | |
93 | return (1); | |
94 | ||
95 | if (!addr1 || !addr2) | |
96 | return (0); | |
97 | ||
98 | if (addr1->addr.sa_family != addr2->addr.sa_family) | |
99 | return (0); | |
100 | ||
101 | #ifdef AF_LOCAL | |
102 | if (addr1->addr.sa_family == AF_LOCAL) | |
103 | return (!strcmp(addr1->un.sun_path, addr2->un.sun_path)); | |
104 | #endif /* AF_LOCAL */ | |
105 | ||
106 | #ifdef AF_INET6 | |
107 | if (addr1->addr.sa_family == AF_INET6) | |
108 | return (!memcmp(&(addr1->ipv6.sin6_addr), &(addr2->ipv6.sin6_addr), 16)); | |
109 | #endif /* AF_INET6 */ | |
110 | ||
111 | return (addr1->ipv4.sin_addr.s_addr == addr2->ipv4.sin_addr.s_addr); | |
112 | } | |
113 | ||
114 | ||
115 | /* | |
116 | * 'httpAddrLength()' - Return the length of the address in bytes. | |
117 | * | |
118 | * @since CUPS 1.2/macOS 10.5@ | |
119 | */ | |
120 | ||
121 | int /* O - Length in bytes */ | |
122 | httpAddrLength(const http_addr_t *addr) /* I - Address */ | |
123 | { | |
124 | if (!addr) | |
125 | return (0); | |
126 | ||
127 | #ifdef AF_INET6 | |
128 | if (addr->addr.sa_family == AF_INET6) | |
129 | return (sizeof(addr->ipv6)); | |
130 | else | |
131 | #endif /* AF_INET6 */ | |
132 | #ifdef AF_LOCAL | |
133 | if (addr->addr.sa_family == AF_LOCAL) | |
134 | return ((int)(offsetof(struct sockaddr_un, sun_path) + strlen(addr->un.sun_path) + 1)); | |
135 | else | |
136 | #endif /* AF_LOCAL */ | |
137 | if (addr->addr.sa_family == AF_INET) | |
138 | return (sizeof(addr->ipv4)); | |
139 | else | |
140 | return (0); | |
141 | ||
142 | } | |
143 | ||
144 | ||
145 | /* | |
146 | * 'httpAddrListen()' - Create a listening socket bound to the specified | |
147 | * address and port. | |
148 | * | |
149 | * @since CUPS 1.7/macOS 10.9@ | |
150 | */ | |
151 | ||
152 | int /* O - Socket or -1 on error */ | |
153 | httpAddrListen(http_addr_t *addr, /* I - Address to bind to */ | |
154 | int port) /* I - Port number to bind to */ | |
155 | { | |
156 | int fd = -1, /* Socket */ | |
157 | val, /* Socket value */ | |
158 | status; /* Bind status */ | |
159 | ||
160 | ||
161 | /* | |
162 | * Range check input... | |
163 | */ | |
164 | ||
165 | if (!addr || port < 0) | |
166 | return (-1); | |
167 | ||
168 | /* | |
169 | * Create the socket and set options... | |
170 | */ | |
171 | ||
172 | if ((fd = socket(addr->addr.sa_family, SOCK_STREAM, 0)) < 0) | |
173 | { | |
174 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
175 | return (-1); | |
176 | } | |
177 | ||
178 | val = 1; | |
179 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, CUPS_SOCAST &val, sizeof(val)); | |
180 | ||
181 | #ifdef IPV6_V6ONLY | |
182 | if (addr->addr.sa_family == AF_INET6) | |
183 | setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, CUPS_SOCAST &val, sizeof(val)); | |
184 | #endif /* IPV6_V6ONLY */ | |
185 | ||
186 | /* | |
187 | * Bind the socket... | |
188 | */ | |
189 | ||
190 | #ifdef AF_LOCAL | |
191 | if (addr->addr.sa_family == AF_LOCAL) | |
192 | { | |
193 | mode_t mask; /* Umask setting */ | |
194 | ||
195 | /* | |
196 | * Remove any existing domain socket file... | |
197 | */ | |
198 | ||
199 | unlink(addr->un.sun_path); | |
200 | ||
201 | /* | |
202 | * Save the current umask and set it to 0 so that all users can access | |
203 | * the domain socket... | |
204 | */ | |
205 | ||
206 | mask = umask(0); | |
207 | ||
208 | /* | |
209 | * Bind the domain socket... | |
210 | */ | |
211 | ||
212 | status = bind(fd, (struct sockaddr *)addr, (socklen_t)httpAddrLength(addr)); | |
213 | ||
214 | /* | |
215 | * Restore the umask and fix permissions... | |
216 | */ | |
217 | ||
218 | umask(mask); | |
219 | chmod(addr->un.sun_path, 0140777); | |
220 | } | |
221 | else | |
222 | #endif /* AF_LOCAL */ | |
223 | { | |
224 | _httpAddrSetPort(addr, port); | |
225 | ||
226 | status = bind(fd, (struct sockaddr *)addr, (socklen_t)httpAddrLength(addr)); | |
227 | } | |
228 | ||
229 | if (status) | |
230 | { | |
231 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
232 | ||
233 | close(fd); | |
234 | ||
235 | return (-1); | |
236 | } | |
237 | ||
238 | /* | |
239 | * Listen... | |
240 | */ | |
241 | ||
242 | if (listen(fd, 5)) | |
243 | { | |
244 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
245 | ||
246 | close(fd); | |
247 | ||
248 | return (-1); | |
249 | } | |
250 | ||
251 | /* | |
252 | * Close on exec... | |
253 | */ | |
254 | ||
255 | #ifndef WIN32 | |
256 | fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); | |
257 | #endif /* !WIN32 */ | |
258 | ||
259 | #ifdef SO_NOSIGPIPE | |
260 | /* | |
261 | * Disable SIGPIPE for this socket. | |
262 | */ | |
263 | ||
264 | val = 1; | |
265 | setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, CUPS_SOCAST &val, sizeof(val)); | |
266 | #endif /* SO_NOSIGPIPE */ | |
267 | ||
268 | return (fd); | |
269 | } | |
270 | ||
271 | ||
272 | /* | |
273 | * 'httpAddrLocalhost()' - Check for the local loopback address. | |
274 | * | |
275 | * @since CUPS 1.2/macOS 10.5@ | |
276 | */ | |
277 | ||
278 | int /* O - 1 if local host, 0 otherwise */ | |
279 | httpAddrLocalhost( | |
280 | const http_addr_t *addr) /* I - Address to check */ | |
281 | { | |
282 | if (!addr) | |
283 | return (1); | |
284 | ||
285 | #ifdef AF_INET6 | |
286 | if (addr->addr.sa_family == AF_INET6 && | |
287 | IN6_IS_ADDR_LOOPBACK(&(addr->ipv6.sin6_addr))) | |
288 | return (1); | |
289 | #endif /* AF_INET6 */ | |
290 | ||
291 | #ifdef AF_LOCAL | |
292 | if (addr->addr.sa_family == AF_LOCAL) | |
293 | return (1); | |
294 | #endif /* AF_LOCAL */ | |
295 | ||
296 | if (addr->addr.sa_family == AF_INET && | |
297 | (ntohl(addr->ipv4.sin_addr.s_addr) & 0xff000000) == 0x7f000000) | |
298 | return (1); | |
299 | ||
300 | return (0); | |
301 | } | |
302 | ||
303 | ||
304 | /* | |
305 | * 'httpAddrLookup()' - Lookup the hostname associated with the address. | |
306 | * | |
307 | * @since CUPS 1.2/macOS 10.5@ | |
308 | */ | |
309 | ||
310 | char * /* O - Host name */ | |
311 | httpAddrLookup( | |
312 | const http_addr_t *addr, /* I - Address to lookup */ | |
313 | char *name, /* I - Host name buffer */ | |
314 | int namelen) /* I - Size of name buffer */ | |
315 | { | |
316 | _cups_globals_t *cg = _cupsGlobals(); | |
317 | /* Global data */ | |
318 | ||
319 | ||
320 | DEBUG_printf(("httpAddrLookup(addr=%p, name=%p, namelen=%d)", (void *)addr, (void *)name, namelen)); | |
321 | ||
322 | /* | |
323 | * Range check input... | |
324 | */ | |
325 | ||
326 | if (!addr || !name || namelen <= 2) | |
327 | { | |
328 | if (name && namelen >= 1) | |
329 | *name = '\0'; | |
330 | ||
331 | return (NULL); | |
332 | } | |
333 | ||
334 | #ifdef AF_LOCAL | |
335 | if (addr->addr.sa_family == AF_LOCAL) | |
336 | { | |
337 | strlcpy(name, addr->un.sun_path, (size_t)namelen); | |
338 | return (name); | |
339 | } | |
340 | #endif /* AF_LOCAL */ | |
341 | ||
342 | /* | |
343 | * Optimize lookups for localhost/loopback addresses... | |
344 | */ | |
345 | ||
346 | if (httpAddrLocalhost(addr)) | |
347 | { | |
348 | strlcpy(name, "localhost", (size_t)namelen); | |
349 | return (name); | |
350 | } | |
351 | ||
352 | #ifdef HAVE_RES_INIT | |
353 | /* | |
354 | * STR #2920: Initialize resolver after failure in cups-polld | |
355 | * | |
356 | * If the previous lookup failed, re-initialize the resolver to prevent | |
357 | * temporary network errors from persisting. This *should* be handled by | |
358 | * the resolver libraries, but apparently the glibc folks do not agree. | |
359 | * | |
360 | * We set a flag at the end of this function if we encounter an error that | |
361 | * requires reinitialization of the resolver functions. We then call | |
362 | * res_init() if the flag is set on the next call here or in httpAddrLookup(). | |
363 | */ | |
364 | ||
365 | if (cg->need_res_init) | |
366 | { | |
367 | res_init(); | |
368 | ||
369 | cg->need_res_init = 0; | |
370 | } | |
371 | #endif /* HAVE_RES_INIT */ | |
372 | ||
373 | #ifdef HAVE_GETNAMEINFO | |
374 | { | |
375 | /* | |
376 | * STR #2486: httpAddrLookup() fails when getnameinfo() returns EAI_AGAIN | |
377 | * | |
378 | * FWIW, I think this is really a bug in the implementation of | |
379 | * getnameinfo(), but falling back on httpAddrString() is easy to | |
380 | * do... | |
381 | */ | |
382 | ||
383 | int error = getnameinfo(&addr->addr, (socklen_t)httpAddrLength(addr), name, (socklen_t)namelen, NULL, 0, 0); | |
384 | ||
385 | if (error) | |
386 | { | |
387 | if (error == EAI_FAIL) | |
388 | cg->need_res_init = 1; | |
389 | ||
390 | return (httpAddrString(addr, name, namelen)); | |
391 | } | |
392 | } | |
393 | #else | |
394 | { | |
395 | struct hostent *host; /* Host from name service */ | |
396 | ||
397 | ||
398 | # ifdef AF_INET6 | |
399 | if (addr->addr.sa_family == AF_INET6) | |
400 | host = gethostbyaddr((char *)&(addr->ipv6.sin6_addr), | |
401 | sizeof(struct in_addr), AF_INET6); | |
402 | else | |
403 | # endif /* AF_INET6 */ | |
404 | host = gethostbyaddr((char *)&(addr->ipv4.sin_addr), | |
405 | sizeof(struct in_addr), AF_INET); | |
406 | ||
407 | if (host == NULL) | |
408 | { | |
409 | /* | |
410 | * No hostname, so return the raw address... | |
411 | */ | |
412 | ||
413 | if (h_errno == NO_RECOVERY) | |
414 | cg->need_res_init = 1; | |
415 | ||
416 | return (httpAddrString(addr, name, namelen)); | |
417 | } | |
418 | ||
419 | strlcpy(name, host->h_name, (size_t)namelen); | |
420 | } | |
421 | #endif /* HAVE_GETNAMEINFO */ | |
422 | ||
423 | DEBUG_printf(("1httpAddrLookup: returning \"%s\"...", name)); | |
424 | ||
425 | return (name); | |
426 | } | |
427 | ||
428 | ||
429 | /* | |
430 | * 'httpAddrFamily()' - Get the address family of an address. | |
431 | */ | |
432 | ||
433 | int /* O - Address family */ | |
434 | httpAddrFamily(http_addr_t *addr) /* I - Address */ | |
435 | { | |
436 | if (addr) | |
437 | return (addr->addr.sa_family); | |
438 | else | |
439 | return (0); | |
440 | } | |
441 | ||
442 | ||
443 | /* | |
444 | * 'httpAddrPort()' - Get the port number associated with an address. | |
445 | * | |
446 | * @since CUPS 1.7/macOS 10.9@ | |
447 | */ | |
448 | ||
449 | int /* O - Port number */ | |
450 | httpAddrPort(http_addr_t *addr) /* I - Address */ | |
451 | { | |
452 | if (!addr) | |
453 | return (-1); | |
454 | #ifdef AF_INET6 | |
455 | else if (addr->addr.sa_family == AF_INET6) | |
456 | return (ntohs(addr->ipv6.sin6_port)); | |
457 | #endif /* AF_INET6 */ | |
458 | else if (addr->addr.sa_family == AF_INET) | |
459 | return (ntohs(addr->ipv4.sin_port)); | |
460 | else | |
461 | return (0); | |
462 | } | |
463 | ||
464 | ||
465 | /* | |
466 | * '_httpAddrSetPort()' - Set the port number associated with an address. | |
467 | */ | |
468 | ||
469 | void | |
470 | _httpAddrSetPort(http_addr_t *addr, /* I - Address */ | |
471 | int port) /* I - Port */ | |
472 | { | |
473 | if (!addr || port <= 0) | |
474 | return; | |
475 | ||
476 | #ifdef AF_INET6 | |
477 | if (addr->addr.sa_family == AF_INET6) | |
478 | addr->ipv6.sin6_port = htons(port); | |
479 | else | |
480 | #endif /* AF_INET6 */ | |
481 | if (addr->addr.sa_family == AF_INET) | |
482 | addr->ipv4.sin_port = htons(port); | |
483 | } | |
484 | ||
485 | ||
486 | /* | |
487 | * 'httpAddrString()' - Convert an address to a numeric string. | |
488 | * | |
489 | * @since CUPS 1.2/macOS 10.5@ | |
490 | */ | |
491 | ||
492 | char * /* O - Numeric address string */ | |
493 | httpAddrString(const http_addr_t *addr, /* I - Address to convert */ | |
494 | char *s, /* I - String buffer */ | |
495 | int slen) /* I - Length of string */ | |
496 | { | |
497 | DEBUG_printf(("httpAddrString(addr=%p, s=%p, slen=%d)", (void *)addr, (void *)s, slen)); | |
498 | ||
499 | /* | |
500 | * Range check input... | |
501 | */ | |
502 | ||
503 | if (!addr || !s || slen <= 2) | |
504 | { | |
505 | if (s && slen >= 1) | |
506 | *s = '\0'; | |
507 | ||
508 | return (NULL); | |
509 | } | |
510 | ||
511 | #ifdef AF_LOCAL | |
512 | if (addr->addr.sa_family == AF_LOCAL) | |
513 | { | |
514 | if (addr->un.sun_path[0] == '/') | |
515 | strlcpy(s, addr->un.sun_path, (size_t)slen); | |
516 | else | |
517 | strlcpy(s, "localhost", (size_t)slen); | |
518 | } | |
519 | else | |
520 | #endif /* AF_LOCAL */ | |
521 | if (addr->addr.sa_family == AF_INET) | |
522 | { | |
523 | unsigned temp; /* Temporary address */ | |
524 | ||
525 | temp = ntohl(addr->ipv4.sin_addr.s_addr); | |
526 | ||
527 | snprintf(s, (size_t)slen, "%d.%d.%d.%d", (temp >> 24) & 255, | |
528 | (temp >> 16) & 255, (temp >> 8) & 255, temp & 255); | |
529 | } | |
530 | #ifdef AF_INET6 | |
531 | else if (addr->addr.sa_family == AF_INET6) | |
532 | { | |
533 | char *sptr, /* Pointer into string */ | |
534 | temps[64]; /* Temporary string for address */ | |
535 | ||
536 | # ifdef HAVE_GETNAMEINFO | |
537 | if (getnameinfo(&addr->addr, (socklen_t)httpAddrLength(addr), temps, sizeof(temps), NULL, 0, NI_NUMERICHOST)) | |
538 | { | |
539 | /* | |
540 | * If we get an error back, then the address type is not supported | |
541 | * and we should zero out the buffer... | |
542 | */ | |
543 | ||
544 | s[0] = '\0'; | |
545 | ||
546 | return (NULL); | |
547 | } | |
548 | else if ((sptr = strchr(temps, '%')) != NULL) | |
549 | { | |
550 | /* | |
551 | * Convert "%zone" to "+zone" to match URI form... | |
552 | */ | |
553 | ||
554 | *sptr = '+'; | |
555 | } | |
556 | ||
557 | # else | |
558 | int i; /* Looping var */ | |
559 | unsigned temp; /* Current value */ | |
560 | const char *prefix; /* Prefix for address */ | |
561 | ||
562 | ||
563 | prefix = ""; | |
564 | for (sptr = temps, i = 0; i < 4 && addr->ipv6.sin6_addr.s6_addr32[i]; i ++) | |
565 | { | |
566 | temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]); | |
567 | ||
568 | snprintf(sptr, sizeof(temps) - (size_t)(sptr - temps), "%s%x", prefix, (temp >> 16) & 0xffff); | |
569 | prefix = ":"; | |
570 | sptr += strlen(sptr); | |
571 | ||
572 | temp &= 0xffff; | |
573 | ||
574 | if (temp || i == 3 || addr->ipv6.sin6_addr.s6_addr32[i + 1]) | |
575 | { | |
576 | snprintf(sptr, sizeof(temps) - (size_t)(sptr - temps), "%s%x", prefix, temp); | |
577 | sptr += strlen(sptr); | |
578 | } | |
579 | } | |
580 | ||
581 | if (i < 4) | |
582 | { | |
583 | while (i < 4 && !addr->ipv6.sin6_addr.s6_addr32[i]) | |
584 | i ++; | |
585 | ||
586 | if (i < 4) | |
587 | { | |
588 | snprintf(sptr, sizeof(temps) - (size_t)(sptr - temps), "%s:", prefix); | |
589 | prefix = ":"; | |
590 | sptr += strlen(sptr); | |
591 | ||
592 | for (; i < 4; i ++) | |
593 | { | |
594 | temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]); | |
595 | ||
596 | if ((temp & 0xffff0000) || | |
597 | (i > 0 && addr->ipv6.sin6_addr.s6_addr32[i - 1])) | |
598 | { | |
599 | snprintf(sptr, sizeof(temps) - (size_t)(sptr - temps), "%s%x", prefix, (temp >> 16) & 0xffff); | |
600 | sptr += strlen(sptr); | |
601 | } | |
602 | ||
603 | snprintf(sptr, sizeof(temps) - (size_t)(sptr - temps), "%s%x", prefix, temp & 0xffff); | |
604 | sptr += strlen(sptr); | |
605 | } | |
606 | } | |
607 | else if (sptr == s) | |
608 | { | |
609 | /* | |
610 | * Empty address... | |
611 | */ | |
612 | ||
613 | strlcpy(temps, "::", sizeof(temps)); | |
614 | } | |
615 | else | |
616 | { | |
617 | /* | |
618 | * Empty at end... | |
619 | */ | |
620 | ||
621 | strlcpy(sptr, "::", sizeof(temps) - (size_t)(sptr - temps)); | |
622 | } | |
623 | } | |
624 | # endif /* HAVE_GETNAMEINFO */ | |
625 | ||
626 | /* | |
627 | * Add "[v1." and "]" around IPv6 address to convert to URI form. | |
628 | */ | |
629 | ||
630 | snprintf(s, (size_t)slen, "[v1.%s]", temps); | |
631 | } | |
632 | #endif /* AF_INET6 */ | |
633 | else | |
634 | strlcpy(s, "UNKNOWN", (size_t)slen); | |
635 | ||
636 | DEBUG_printf(("1httpAddrString: returning \"%s\"...", s)); | |
637 | ||
638 | return (s); | |
639 | } | |
640 | ||
641 | ||
642 | /* | |
643 | * 'httpGetAddress()' - Get the address of the connected peer of a connection. | |
644 | * | |
645 | * For connections created with @link httpConnect2@, the address is for the | |
646 | * server. For connections created with @link httpAccept@, the address is for | |
647 | * the client. | |
648 | * | |
649 | * Returns @code NULL@ if the socket is currently unconnected. | |
650 | * | |
651 | * @since CUPS 2.0/OS 10.10@ | |
652 | */ | |
653 | ||
654 | http_addr_t * /* O - Connected address or @code NULL@ */ | |
655 | httpGetAddress(http_t *http) /* I - HTTP connection */ | |
656 | { | |
657 | if (http) | |
658 | return (http->hostaddr); | |
659 | else | |
660 | return (NULL); | |
661 | } | |
662 | ||
663 | ||
664 | /* | |
665 | * 'httpGetHostByName()' - Lookup a hostname or IPv4 address, and return | |
666 | * address records for the specified name. | |
667 | * | |
668 | * @deprecated@ @exclude all@ | |
669 | */ | |
670 | ||
671 | struct hostent * /* O - Host entry */ | |
672 | httpGetHostByName(const char *name) /* I - Hostname or IP address */ | |
673 | { | |
674 | const char *nameptr; /* Pointer into name */ | |
675 | unsigned ip[4]; /* IP address components */ | |
676 | _cups_globals_t *cg = _cupsGlobals(); | |
677 | /* Pointer to library globals */ | |
678 | ||
679 | ||
680 | DEBUG_printf(("httpGetHostByName(name=\"%s\")", name)); | |
681 | ||
682 | /* | |
683 | * Avoid lookup delays and configuration problems when connecting | |
684 | * to the localhost address... | |
685 | */ | |
686 | ||
687 | if (!strcmp(name, "localhost")) | |
688 | name = "127.0.0.1"; | |
689 | ||
690 | /* | |
691 | * This function is needed because some operating systems have a | |
692 | * buggy implementation of gethostbyname() that does not support | |
693 | * IP addresses. If the first character of the name string is a | |
694 | * number, then sscanf() is used to extract the IP components. | |
695 | * We then pack the components into an IPv4 address manually, | |
696 | * since the inet_aton() function is deprecated. We use the | |
697 | * htonl() macro to get the right byte order for the address. | |
698 | * | |
699 | * We also support domain sockets when supported by the underlying | |
700 | * OS... | |
701 | */ | |
702 | ||
703 | #ifdef AF_LOCAL | |
704 | if (name[0] == '/') | |
705 | { | |
706 | /* | |
707 | * A domain socket address, so make an AF_LOCAL entry and return it... | |
708 | */ | |
709 | ||
710 | cg->hostent.h_name = (char *)name; | |
711 | cg->hostent.h_aliases = NULL; | |
712 | cg->hostent.h_addrtype = AF_LOCAL; | |
713 | cg->hostent.h_length = (int)strlen(name) + 1; | |
714 | cg->hostent.h_addr_list = cg->ip_ptrs; | |
715 | cg->ip_ptrs[0] = (char *)name; | |
716 | cg->ip_ptrs[1] = NULL; | |
717 | ||
718 | DEBUG_puts("1httpGetHostByName: returning domain socket address..."); | |
719 | ||
720 | return (&cg->hostent); | |
721 | } | |
722 | #endif /* AF_LOCAL */ | |
723 | ||
724 | for (nameptr = name; isdigit(*nameptr & 255) || *nameptr == '.'; nameptr ++); | |
725 | ||
726 | if (!*nameptr) | |
727 | { | |
728 | /* | |
729 | * We have an IPv4 address; break it up and provide the host entry | |
730 | * to the caller. | |
731 | */ | |
732 | ||
733 | if (sscanf(name, "%u.%u.%u.%u", ip, ip + 1, ip + 2, ip + 3) != 4) | |
734 | return (NULL); /* Must have 4 numbers */ | |
735 | ||
736 | if (ip[0] > 255 || ip[1] > 255 || ip[2] > 255 || ip[3] > 255) | |
737 | return (NULL); /* Invalid byte ranges! */ | |
738 | ||
739 | cg->ip_addr = htonl((((((((unsigned)ip[0] << 8) | (unsigned)ip[1]) << 8) | | |
740 | (unsigned)ip[2]) << 8) | | |
741 | (unsigned)ip[3])); | |
742 | ||
743 | /* | |
744 | * Fill in the host entry and return it... | |
745 | */ | |
746 | ||
747 | cg->hostent.h_name = (char *)name; | |
748 | cg->hostent.h_aliases = NULL; | |
749 | cg->hostent.h_addrtype = AF_INET; | |
750 | cg->hostent.h_length = 4; | |
751 | cg->hostent.h_addr_list = cg->ip_ptrs; | |
752 | cg->ip_ptrs[0] = (char *)&(cg->ip_addr); | |
753 | cg->ip_ptrs[1] = NULL; | |
754 | ||
755 | DEBUG_puts("1httpGetHostByName: returning IPv4 address..."); | |
756 | ||
757 | return (&cg->hostent); | |
758 | } | |
759 | else | |
760 | { | |
761 | /* | |
762 | * Use the gethostbyname() function to get the IPv4 address for | |
763 | * the name... | |
764 | */ | |
765 | ||
766 | DEBUG_puts("1httpGetHostByName: returning domain lookup address(es)..."); | |
767 | ||
768 | return (gethostbyname(name)); | |
769 | } | |
770 | } | |
771 | ||
772 | ||
773 | /* | |
774 | * 'httpGetHostname()' - Get the FQDN for the connection or local system. | |
775 | * | |
776 | * When "http" points to a connected socket, return the hostname or | |
777 | * address that was used in the call to httpConnect() or httpConnectEncrypt(), | |
778 | * or the address of the client for the connection from httpAcceptConnection(). | |
779 | * Otherwise, return the FQDN for the local system using both gethostname() | |
780 | * and gethostbyname() to get the local hostname with domain. | |
781 | * | |
782 | * @since CUPS 1.2/macOS 10.5@ | |
783 | */ | |
784 | ||
785 | const char * /* O - FQDN for connection or system */ | |
786 | httpGetHostname(http_t *http, /* I - HTTP connection or NULL */ | |
787 | char *s, /* I - String buffer for name */ | |
788 | int slen) /* I - Size of buffer */ | |
789 | { | |
790 | if (http) | |
791 | { | |
792 | if (!s || slen <= 1) | |
793 | { | |
794 | if (http->hostname[0] == '/') | |
795 | return ("localhost"); | |
796 | else | |
797 | return (http->hostname); | |
798 | } | |
799 | else if (http->hostname[0] == '/') | |
800 | strlcpy(s, "localhost", (size_t)slen); | |
801 | else | |
802 | strlcpy(s, http->hostname, (size_t)slen); | |
803 | } | |
804 | else | |
805 | { | |
806 | /* | |
807 | * Get the hostname... | |
808 | */ | |
809 | ||
810 | if (!s || slen <= 1) | |
811 | return (NULL); | |
812 | ||
813 | if (gethostname(s, (size_t)slen) < 0) | |
814 | strlcpy(s, "localhost", (size_t)slen); | |
815 | ||
816 | if (!strchr(s, '.')) | |
817 | { | |
818 | #ifdef HAVE_SCDYNAMICSTORECOPYCOMPUTERNAME | |
819 | /* | |
820 | * The hostname is not a FQDN, so use the local hostname from the | |
821 | * SystemConfiguration framework... | |
822 | */ | |
823 | ||
824 | SCDynamicStoreRef sc = SCDynamicStoreCreate(kCFAllocatorDefault, | |
825 | CFSTR("libcups"), NULL, NULL); | |
826 | /* System configuration data */ | |
827 | CFStringRef local = sc ? SCDynamicStoreCopyLocalHostName(sc) : NULL; | |
828 | /* Local host name */ | |
829 | char localStr[1024]; /* Local host name C string */ | |
830 | ||
831 | if (local && CFStringGetCString(local, localStr, sizeof(localStr), | |
832 | kCFStringEncodingUTF8)) | |
833 | { | |
834 | /* | |
835 | * Append ".local." to the hostname we get... | |
836 | */ | |
837 | ||
838 | snprintf(s, (size_t)slen, "%s.local.", localStr); | |
839 | } | |
840 | ||
841 | if (local) | |
842 | CFRelease(local); | |
843 | if (sc) | |
844 | CFRelease(sc); | |
845 | ||
846 | #else | |
847 | /* | |
848 | * The hostname is not a FQDN, so look it up... | |
849 | */ | |
850 | ||
851 | struct hostent *host; /* Host entry to get FQDN */ | |
852 | ||
853 | if ((host = gethostbyname(s)) != NULL && host->h_name) | |
854 | { | |
855 | /* | |
856 | * Use the resolved hostname... | |
857 | */ | |
858 | ||
859 | strlcpy(s, host->h_name, (size_t)slen); | |
860 | } | |
861 | #endif /* HAVE_SCDYNAMICSTORECOPYCOMPUTERNAME */ | |
862 | } | |
863 | ||
864 | /* | |
865 | * Make sure .local hostnames end with a period... | |
866 | */ | |
867 | ||
868 | if (strlen(s) > 6 && !strcmp(s + strlen(s) - 6, ".local")) | |
869 | strlcat(s, ".", (size_t)slen); | |
870 | } | |
871 | ||
872 | /* | |
873 | * Convert the hostname to lowercase as needed... | |
874 | */ | |
875 | ||
876 | if (s[0] != '/') | |
877 | { | |
878 | char *ptr; /* Pointer into string */ | |
879 | ||
880 | for (ptr = s; *ptr; ptr ++) | |
881 | *ptr = (char)_cups_tolower((int)*ptr); | |
882 | } | |
883 | ||
884 | /* | |
885 | * Return the hostname with as much domain info as we have... | |
886 | */ | |
887 | ||
888 | return (s); | |
889 | } | |
890 | ||
891 | ||
892 | /* | |
893 | * 'httpResolveHostname()' - Resolve the hostname of the HTTP connection | |
894 | * address. | |
895 | * | |
896 | * @since CUPS 2.0/OS 10.10@ | |
897 | */ | |
898 | ||
899 | const char * /* O - Resolved hostname or @code NULL@ */ | |
900 | httpResolveHostname(http_t *http, /* I - HTTP connection */ | |
901 | char *buffer, /* I - Hostname buffer */ | |
902 | size_t bufsize) /* I - Size of buffer */ | |
903 | { | |
904 | if (!http) | |
905 | return (NULL); | |
906 | ||
907 | if (isdigit(http->hostname[0] & 255) || http->hostname[0] == '[') | |
908 | { | |
909 | char temp[1024]; /* Temporary string */ | |
910 | ||
911 | if (httpAddrLookup(http->hostaddr, temp, sizeof(temp))) | |
912 | strlcpy(http->hostname, temp, sizeof(http->hostname)); | |
913 | else | |
914 | return (NULL); | |
915 | } | |
916 | ||
917 | if (buffer) | |
918 | { | |
919 | if (http->hostname[0] == '/') | |
920 | strlcpy(buffer, "localhost", bufsize); | |
921 | else | |
922 | strlcpy(buffer, http->hostname, bufsize); | |
923 | ||
924 | return (buffer); | |
925 | } | |
926 | else if (http->hostname[0] == '/') | |
927 | return ("localhost"); | |
928 | else | |
929 | return (http->hostname); | |
930 | } |