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ef416fc2 | 1 | /* |
b19ccc9e | 2 | * "$Id: http-addr.c 7910 2008-09-06 00:25:17Z mike $" |
ef416fc2 | 3 | * |
71e16022 | 4 | * HTTP address routines for CUPS. |
ef416fc2 | 5 | * |
71e16022 | 6 | * Copyright 2007-2010 by Apple Inc. |
ecdc0628 | 7 | * Copyright 1997-2006 by Easy Software Products, all rights reserved. |
ef416fc2 | 8 | * |
9 | * These coded instructions, statements, and computer programs are the | |
bc44d920 | 10 | * property of Apple Inc. and are protected by Federal copyright |
11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
12 | * which should have been included with this file. If this file is | |
13 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
ef416fc2 | 14 | * |
15 | * Contents: | |
16 | * | |
17 | * httpAddrAny() - Check for the "any" address. | |
18 | * httpAddrEqual() - Compare two addresses. | |
19 | * httpAddrLocalhost() - Check for the local loopback address. | |
20 | * httpAddrLookup() - Lookup the hostname associated with the address. | |
1ff0402e | 21 | * _httpAddrPort() - Get the port number associated with an address. |
ef416fc2 | 22 | * httpAddrString() - Convert an IP address to a dotted string. |
23 | * httpGetHostByName() - Lookup a hostname or IP address, and return | |
24 | * address records for the specified name. | |
25 | * httpGetHostname() - Get the FQDN for the local system. | |
26 | */ | |
27 | ||
28 | /* | |
29 | * Include necessary headers... | |
30 | */ | |
31 | ||
71e16022 | 32 | #include "cups-private.h" |
49d87452 MS |
33 | #ifdef HAVE_RESOLV_H |
34 | # include <resolv.h> | |
35 | #endif /* HAVE_RESOLV_H */ | |
1106b00e MS |
36 | #ifdef HAVE_COREFOUNDATION |
37 | # include <CoreFoundation/CoreFoundation.h> | |
38 | #endif /* HAVE_COREFOUNDATION */ | |
39 | #ifdef HAVE_SYSTEMCONFIGURATION | |
40 | # include <SystemConfiguration/SystemConfiguration.h> | |
41 | #endif /* HAVE_SYSTEMCONFIGURATION */ | |
ef416fc2 | 42 | |
43 | ||
44 | /* | |
45 | * 'httpAddrAny()' - Check for the "any" address. | |
46 | * | |
426c6a59 | 47 | * @since CUPS 1.2/Mac OS X 10.5@ |
ef416fc2 | 48 | */ |
49 | ||
50 | int /* O - 1 if "any", 0 otherwise */ | |
51 | httpAddrAny(const http_addr_t *addr) /* I - Address to check */ | |
52 | { | |
89d46774 | 53 | if (!addr) |
54 | return (0); | |
55 | ||
ef416fc2 | 56 | #ifdef AF_INET6 |
57 | if (addr->addr.sa_family == AF_INET6 && | |
58 | IN6_IS_ADDR_UNSPECIFIED(&(addr->ipv6.sin6_addr))) | |
59 | return (1); | |
60 | #endif /* AF_INET6 */ | |
61 | ||
62 | if (addr->addr.sa_family == AF_INET && | |
63 | ntohl(addr->ipv4.sin_addr.s_addr) == 0x00000000) | |
64 | return (1); | |
65 | ||
66 | return (0); | |
67 | } | |
68 | ||
69 | ||
70 | /* | |
71 | * 'httpAddrEqual()' - Compare two addresses. | |
72 | * | |
426c6a59 | 73 | * @since CUPS 1.2/Mac OS X 10.5@ |
ef416fc2 | 74 | */ |
75 | ||
ecdc0628 | 76 | int /* O - 1 if equal, 0 if not */ |
ef416fc2 | 77 | httpAddrEqual(const http_addr_t *addr1, /* I - First address */ |
78 | const http_addr_t *addr2) /* I - Second address */ | |
79 | { | |
89d46774 | 80 | if (!addr1 && !addr2) |
81 | return (1); | |
82 | ||
83 | if (!addr1 || !addr2) | |
84 | return (0); | |
85 | ||
ef416fc2 | 86 | if (addr1->addr.sa_family != addr2->addr.sa_family) |
87 | return (0); | |
88 | ||
89 | #ifdef AF_LOCAL | |
90 | if (addr1->addr.sa_family == AF_LOCAL) | |
91 | return (!strcmp(addr1->un.sun_path, addr2->un.sun_path)); | |
92 | #endif /* AF_LOCAL */ | |
93 | ||
94 | #ifdef AF_INET6 | |
95 | if (addr1->addr.sa_family == AF_INET6) | |
96 | return (!memcmp(&(addr1->ipv6.sin6_addr), &(addr2->ipv6.sin6_addr), 16)); | |
97 | #endif /* AF_INET6 */ | |
98 | ||
99 | return (addr1->ipv4.sin_addr.s_addr == addr2->ipv4.sin_addr.s_addr); | |
100 | } | |
101 | ||
102 | ||
103 | /* | |
104 | * 'httpAddrLength()' - Return the length of the address in bytes. | |
105 | * | |
426c6a59 | 106 | * @since CUPS 1.2/Mac OS X 10.5@ |
ef416fc2 | 107 | */ |
108 | ||
109 | int /* O - Length in bytes */ | |
110 | httpAddrLength(const http_addr_t *addr) /* I - Address */ | |
111 | { | |
89d46774 | 112 | if (!addr) |
113 | return (0); | |
114 | ||
ef416fc2 | 115 | #ifdef AF_INET6 |
116 | if (addr->addr.sa_family == AF_INET6) | |
117 | return (sizeof(addr->ipv6)); | |
118 | else | |
119 | #endif /* AF_INET6 */ | |
120 | #ifdef AF_LOCAL | |
121 | if (addr->addr.sa_family == AF_LOCAL) | |
122 | return (offsetof(struct sockaddr_un, sun_path) + | |
123 | strlen(addr->un.sun_path) + 1); | |
124 | else | |
125 | #endif /* AF_LOCAL */ | |
126 | if (addr->addr.sa_family == AF_INET) | |
127 | return (sizeof(addr->ipv4)); | |
128 | else | |
129 | return (0); | |
130 | ||
131 | } | |
132 | ||
133 | ||
134 | /* | |
135 | * 'httpAddrLocalhost()' - Check for the local loopback address. | |
136 | * | |
426c6a59 | 137 | * @since CUPS 1.2/Mac OS X 10.5@ |
ef416fc2 | 138 | */ |
139 | ||
140 | int /* O - 1 if local host, 0 otherwise */ | |
141 | httpAddrLocalhost( | |
142 | const http_addr_t *addr) /* I - Address to check */ | |
143 | { | |
89d46774 | 144 | if (!addr) |
145 | return (1); | |
146 | ||
ef416fc2 | 147 | #ifdef AF_INET6 |
148 | if (addr->addr.sa_family == AF_INET6 && | |
fa73b229 | 149 | IN6_IS_ADDR_LOOPBACK(&(addr->ipv6.sin6_addr))) |
ef416fc2 | 150 | return (1); |
151 | #endif /* AF_INET6 */ | |
152 | ||
153 | #ifdef AF_LOCAL | |
154 | if (addr->addr.sa_family == AF_LOCAL) | |
155 | return (1); | |
156 | #endif /* AF_LOCAL */ | |
157 | ||
158 | if (addr->addr.sa_family == AF_INET && | |
e07d4801 | 159 | (ntohl(addr->ipv4.sin_addr.s_addr) & 0xff000000) == 0x7f000000) |
ef416fc2 | 160 | return (1); |
161 | ||
162 | return (0); | |
163 | } | |
164 | ||
165 | ||
166 | #ifdef __sgi | |
167 | # define ADDR_CAST (struct sockaddr *) | |
168 | #else | |
169 | # define ADDR_CAST (char *) | |
170 | #endif /* __sgi */ | |
171 | ||
172 | ||
173 | /* | |
174 | * 'httpAddrLookup()' - Lookup the hostname associated with the address. | |
175 | * | |
426c6a59 | 176 | * @since CUPS 1.2/Mac OS X 10.5@ |
ef416fc2 | 177 | */ |
178 | ||
ecdc0628 | 179 | char * /* O - Host name */ |
180 | httpAddrLookup( | |
181 | const http_addr_t *addr, /* I - Address to lookup */ | |
182 | char *name, /* I - Host name buffer */ | |
183 | int namelen) /* I - Size of name buffer */ | |
ef416fc2 | 184 | { |
49d87452 MS |
185 | _cups_globals_t *cg = _cupsGlobals(); |
186 | /* Global data */ | |
187 | ||
188 | ||
e07d4801 MS |
189 | DEBUG_printf(("httpAddrLookup(addr=%p, name=%p, namelen=%d)", addr, name, |
190 | namelen)); | |
ef416fc2 | 191 | |
192 | /* | |
193 | * Range check input... | |
194 | */ | |
195 | ||
196 | if (!addr || !name || namelen <= 2) | |
197 | { | |
198 | if (name && namelen >= 1) | |
199 | *name = '\0'; | |
200 | ||
201 | return (NULL); | |
202 | } | |
203 | ||
204 | #ifdef AF_LOCAL | |
205 | if (addr->addr.sa_family == AF_LOCAL) | |
49d87452 | 206 | { |
ef416fc2 | 207 | strlcpy(name, addr->un.sun_path, namelen); |
49d87452 MS |
208 | return (name); |
209 | } | |
ef416fc2 | 210 | #endif /* AF_LOCAL */ |
49d87452 | 211 | |
d2354e63 MS |
212 | /* |
213 | * Optimize lookups for localhost/loopback addresses... | |
214 | */ | |
215 | ||
216 | if (httpAddrLocalhost(addr)) | |
217 | { | |
218 | strlcpy(name, "localhost", namelen); | |
219 | return (name); | |
220 | } | |
221 | ||
49d87452 MS |
222 | #ifdef HAVE_RES_INIT |
223 | /* | |
224 | * STR #2920: Initialize resolver after failure in cups-polld | |
225 | * | |
226 | * If the previous lookup failed, re-initialize the resolver to prevent | |
227 | * temporary network errors from persisting. This *should* be handled by | |
228 | * the resolver libraries, but apparently the glibc folks do not agree. | |
229 | * | |
230 | * We set a flag at the end of this function if we encounter an error that | |
231 | * requires reinitialization of the resolver functions. We then call | |
232 | * res_init() if the flag is set on the next call here or in httpAddrLookup(). | |
233 | */ | |
234 | ||
235 | if (cg->need_res_init) | |
236 | { | |
237 | res_init(); | |
238 | ||
239 | cg->need_res_init = 0; | |
240 | } | |
241 | #endif /* HAVE_RES_INIT */ | |
242 | ||
ef416fc2 | 243 | #ifdef HAVE_GETNAMEINFO |
244 | { | |
db1f069b MS |
245 | /* |
246 | * STR #2486: httpAddrLookup() fails when getnameinfo() returns EAI_AGAIN | |
247 | * | |
248 | * FWIW, I think this is really a bug in the implementation of | |
249 | * getnameinfo(), but falling back on httpAddrString() is easy to | |
250 | * do... | |
251 | */ | |
ef416fc2 | 252 | |
49d87452 MS |
253 | int error = getnameinfo(&addr->addr, httpAddrLength(addr), name, namelen, |
254 | NULL, 0, 0); | |
255 | ||
256 | if (error) | |
257 | { | |
258 | if (error == EAI_FAIL) | |
259 | cg->need_res_init = 1; | |
260 | ||
db1f069b | 261 | return (httpAddrString(addr, name, namelen)); |
49d87452 | 262 | } |
ef416fc2 | 263 | } |
264 | #else | |
265 | { | |
266 | struct hostent *host; /* Host from name service */ | |
267 | ||
268 | ||
269 | # ifdef AF_INET6 | |
270 | if (addr->addr.sa_family == AF_INET6) | |
271 | host = gethostbyaddr(ADDR_CAST &(addr->ipv6.sin6_addr), | |
272 | sizeof(struct in_addr), AF_INET6); | |
273 | else | |
274 | # endif /* AF_INET6 */ | |
275 | host = gethostbyaddr(ADDR_CAST &(addr->ipv4.sin_addr), | |
276 | sizeof(struct in_addr), AF_INET); | |
277 | ||
278 | if (host == NULL) | |
279 | { | |
280 | /* | |
281 | * No hostname, so return the raw address... | |
282 | */ | |
283 | ||
49d87452 MS |
284 | if (h_errno == NO_RECOVERY) |
285 | cg->need_res_init = 1; | |
286 | ||
287 | return (httpAddrString(addr, name, namelen)); | |
ef416fc2 | 288 | } |
289 | ||
290 | strlcpy(name, host->h_name, namelen); | |
291 | } | |
292 | #endif /* HAVE_GETNAMEINFO */ | |
293 | ||
e07d4801 MS |
294 | DEBUG_printf(("1httpAddrLookup: returning \"%s\"...", name)); |
295 | ||
ef416fc2 | 296 | return (name); |
297 | } | |
298 | ||
299 | ||
1ff0402e MS |
300 | /* |
301 | * '_httpAddrPort()' - Get the port number associated with an address. | |
302 | */ | |
303 | ||
304 | int /* O - Port number */ | |
305 | _httpAddrPort(http_addr_t *addr) /* I - Address */ | |
306 | { | |
5f64df29 MS |
307 | if (!addr) |
308 | return (ippPort()); | |
1ff0402e | 309 | #ifdef AF_INET6 |
5f64df29 | 310 | else if (addr->addr.sa_family == AF_INET6) |
1ff0402e | 311 | return (ntohs(addr->ipv6.sin6_port)); |
1ff0402e | 312 | #endif /* AF_INET6 */ |
5f64df29 | 313 | else if (addr->addr.sa_family == AF_INET) |
1ff0402e MS |
314 | return (ntohs(addr->ipv4.sin_port)); |
315 | else | |
316 | return (ippPort()); | |
317 | } | |
318 | ||
319 | ||
ef416fc2 | 320 | /* |
ecdc0628 | 321 | * 'httpAddrString()' - Convert an address to a numeric string. |
ef416fc2 | 322 | * |
426c6a59 | 323 | * @since CUPS 1.2/Mac OS X 10.5@ |
ef416fc2 | 324 | */ |
325 | ||
ecdc0628 | 326 | char * /* O - Numeric address string */ |
327 | httpAddrString(const http_addr_t *addr, /* I - Address to convert */ | |
328 | char *s, /* I - String buffer */ | |
329 | int slen) /* I - Length of string */ | |
ef416fc2 | 330 | { |
e07d4801 | 331 | DEBUG_printf(("httpAddrString(addr=%p, s=%p, slen=%d)", addr, s, slen)); |
ef416fc2 | 332 | |
333 | /* | |
334 | * Range check input... | |
335 | */ | |
336 | ||
337 | if (!addr || !s || slen <= 2) | |
338 | { | |
339 | if (s && slen >= 1) | |
340 | *s = '\0'; | |
341 | ||
342 | return (NULL); | |
343 | } | |
344 | ||
345 | #ifdef AF_LOCAL | |
346 | if (addr->addr.sa_family == AF_LOCAL) | |
347 | strlcpy(s, addr->un.sun_path, slen); | |
348 | else | |
349 | #endif /* AF_LOCAL */ | |
b423cd4c | 350 | if (addr->addr.sa_family == AF_INET) |
ef416fc2 | 351 | { |
b423cd4c | 352 | unsigned temp; /* Temporary address */ |
ef416fc2 | 353 | |
354 | ||
b423cd4c | 355 | temp = ntohl(addr->ipv4.sin_addr.s_addr); |
356 | ||
357 | snprintf(s, slen, "%d.%d.%d.%d", (temp >> 24) & 255, | |
358 | (temp >> 16) & 255, (temp >> 8) & 255, temp & 255); | |
359 | } | |
360 | #ifdef AF_INET6 | |
361 | else if (addr->addr.sa_family == AF_INET6) | |
362 | { | |
363 | # ifdef HAVE_GETNAMEINFO | |
ef416fc2 | 364 | if (getnameinfo(&addr->addr, httpAddrLength(addr), s, slen, |
b423cd4c | 365 | NULL, 0, NI_NUMERICHOST)) |
ef416fc2 | 366 | { |
367 | /* | |
368 | * If we get an error back, then the address type is not supported | |
369 | * and we should zero out the buffer... | |
370 | */ | |
371 | ||
372 | s[0] = '\0'; | |
373 | ||
374 | return (NULL); | |
375 | } | |
b423cd4c | 376 | # else |
377 | char *sptr; /* Pointer into string */ | |
378 | int i; /* Looping var */ | |
379 | unsigned temp; /* Current value */ | |
380 | const char *prefix; /* Prefix for address */ | |
381 | ||
382 | ||
383 | prefix = ""; | |
384 | for (sptr = s, i = 0; i < 4 && addr->ipv6.sin6_addr.s6_addr32[i]; i ++) | |
ef416fc2 | 385 | { |
b423cd4c | 386 | temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]); |
ef416fc2 | 387 | |
b423cd4c | 388 | snprintf(sptr, slen, "%s%x", prefix, (temp >> 16) & 0xffff); |
389 | prefix = ":"; | |
390 | slen -= strlen(sptr); | |
391 | sptr += strlen(sptr); | |
ef416fc2 | 392 | |
b423cd4c | 393 | temp &= 0xffff; |
ef416fc2 | 394 | |
b423cd4c | 395 | if (temp || i == 3 || addr->ipv6.sin6_addr.s6_addr32[i + 1]) |
396 | { | |
397 | snprintf(sptr, slen, "%s%x", prefix, temp); | |
ef416fc2 | 398 | slen -= strlen(sptr); |
399 | sptr += strlen(sptr); | |
ef416fc2 | 400 | } |
b423cd4c | 401 | } |
402 | ||
403 | if (i < 4) | |
404 | { | |
405 | while (i < 4 && !addr->ipv6.sin6_addr.s6_addr32[i]) | |
406 | i ++; | |
ef416fc2 | 407 | |
408 | if (i < 4) | |
409 | { | |
b423cd4c | 410 | snprintf(sptr, slen, "%s:", prefix); |
411 | prefix = ":"; | |
412 | slen -= strlen(sptr); | |
413 | sptr += strlen(sptr); | |
ef416fc2 | 414 | |
b423cd4c | 415 | for (; i < 4; i ++) |
ef416fc2 | 416 | { |
b423cd4c | 417 | temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]); |
ef416fc2 | 418 | |
b423cd4c | 419 | if ((temp & 0xffff0000) || addr->ipv6.sin6_addr.s6_addr32[i - 1]) |
ef416fc2 | 420 | { |
b423cd4c | 421 | snprintf(sptr, slen, "%s%x", prefix, (temp >> 16) & 0xffff); |
ef416fc2 | 422 | slen -= strlen(sptr); |
423 | sptr += strlen(sptr); | |
b423cd4c | 424 | } |
ef416fc2 | 425 | |
b423cd4c | 426 | snprintf(sptr, slen, "%s%x", prefix, temp & 0xffff); |
427 | slen -= strlen(sptr); | |
428 | sptr += strlen(sptr); | |
ef416fc2 | 429 | } |
430 | } | |
b423cd4c | 431 | else if (sptr == s) |
432 | { | |
433 | /* | |
434 | * Empty address... | |
435 | */ | |
ef416fc2 | 436 | |
b423cd4c | 437 | strlcpy(s, "::", slen); |
438 | sptr = s + 2; | |
439 | slen -= 2; | |
440 | } | |
441 | else | |
442 | { | |
443 | /* | |
444 | * Empty at end... | |
445 | */ | |
ef416fc2 | 446 | |
b423cd4c | 447 | strlcpy(sptr, "::", slen); |
448 | sptr += 2; | |
449 | slen -= 2; | |
450 | } | |
ef416fc2 | 451 | } |
b423cd4c | 452 | # endif /* HAVE_GETNAMEINFO */ |
ef416fc2 | 453 | } |
b423cd4c | 454 | #endif /* AF_INET6 */ |
455 | else | |
456 | strlcpy(s, "UNKNOWN", slen); | |
ef416fc2 | 457 | |
e07d4801 | 458 | DEBUG_printf(("1httpAddrString: returning \"%s\"...", s)); |
ef416fc2 | 459 | |
460 | return (s); | |
461 | } | |
462 | ||
463 | ||
464 | /* | |
465 | * 'httpGetHostByName()' - Lookup a hostname or IPv4 address, and return | |
466 | * address records for the specified name. | |
467 | * | |
468 | * @deprecated@ | |
469 | */ | |
470 | ||
471 | struct hostent * /* O - Host entry */ | |
472 | httpGetHostByName(const char *name) /* I - Hostname or IP address */ | |
473 | { | |
474 | const char *nameptr; /* Pointer into name */ | |
475 | unsigned ip[4]; /* IP address components */ | |
476 | _cups_globals_t *cg = _cupsGlobals(); | |
477 | /* Pointer to library globals */ | |
478 | ||
479 | ||
e07d4801 | 480 | DEBUG_printf(("httpGetHostByName(name=\"%s\")", name)); |
ef416fc2 | 481 | |
482 | /* | |
483 | * Avoid lookup delays and configuration problems when connecting | |
484 | * to the localhost address... | |
485 | */ | |
486 | ||
487 | if (!strcmp(name, "localhost")) | |
488 | name = "127.0.0.1"; | |
489 | ||
490 | /* | |
491 | * This function is needed because some operating systems have a | |
492 | * buggy implementation of gethostbyname() that does not support | |
493 | * IP addresses. If the first character of the name string is a | |
494 | * number, then sscanf() is used to extract the IP components. | |
495 | * We then pack the components into an IPv4 address manually, | |
496 | * since the inet_aton() function is deprecated. We use the | |
497 | * htonl() macro to get the right byte order for the address. | |
498 | * | |
499 | * We also support domain sockets when supported by the underlying | |
500 | * OS... | |
501 | */ | |
502 | ||
503 | #ifdef AF_LOCAL | |
504 | if (name[0] == '/') | |
505 | { | |
506 | /* | |
507 | * A domain socket address, so make an AF_LOCAL entry and return it... | |
508 | */ | |
509 | ||
510 | cg->hostent.h_name = (char *)name; | |
511 | cg->hostent.h_aliases = NULL; | |
512 | cg->hostent.h_addrtype = AF_LOCAL; | |
513 | cg->hostent.h_length = strlen(name) + 1; | |
514 | cg->hostent.h_addr_list = cg->ip_ptrs; | |
515 | cg->ip_ptrs[0] = (char *)name; | |
516 | cg->ip_ptrs[1] = NULL; | |
517 | ||
e07d4801 | 518 | DEBUG_puts("1httpGetHostByName: returning domain socket address..."); |
ef416fc2 | 519 | |
520 | return (&cg->hostent); | |
521 | } | |
522 | #endif /* AF_LOCAL */ | |
523 | ||
524 | for (nameptr = name; isdigit(*nameptr & 255) || *nameptr == '.'; nameptr ++); | |
525 | ||
526 | if (!*nameptr) | |
527 | { | |
528 | /* | |
529 | * We have an IPv4 address; break it up and provide the host entry | |
530 | * to the caller. | |
531 | */ | |
532 | ||
533 | if (sscanf(name, "%u.%u.%u.%u", ip, ip + 1, ip + 2, ip + 3) != 4) | |
534 | return (NULL); /* Must have 4 numbers */ | |
535 | ||
536 | if (ip[0] > 255 || ip[1] > 255 || ip[2] > 255 || ip[3] > 255) | |
537 | return (NULL); /* Invalid byte ranges! */ | |
538 | ||
539 | cg->ip_addr = htonl(((((((ip[0] << 8) | ip[1]) << 8) | ip[2]) << 8) | | |
540 | ip[3])); | |
541 | ||
542 | /* | |
543 | * Fill in the host entry and return it... | |
544 | */ | |
545 | ||
546 | cg->hostent.h_name = (char *)name; | |
547 | cg->hostent.h_aliases = NULL; | |
548 | cg->hostent.h_addrtype = AF_INET; | |
549 | cg->hostent.h_length = 4; | |
550 | cg->hostent.h_addr_list = cg->ip_ptrs; | |
551 | cg->ip_ptrs[0] = (char *)&(cg->ip_addr); | |
552 | cg->ip_ptrs[1] = NULL; | |
553 | ||
e07d4801 | 554 | DEBUG_puts("1httpGetHostByName: returning IPv4 address..."); |
ef416fc2 | 555 | |
556 | return (&cg->hostent); | |
557 | } | |
558 | else | |
559 | { | |
560 | /* | |
561 | * Use the gethostbyname() function to get the IPv4 address for | |
562 | * the name... | |
563 | */ | |
564 | ||
e07d4801 | 565 | DEBUG_puts("1httpGetHostByName: returning domain lookup address(es)..."); |
ef416fc2 | 566 | |
567 | return (gethostbyname(name)); | |
568 | } | |
569 | } | |
570 | ||
571 | ||
572 | /* | |
757d2cad | 573 | * 'httpGetHostname()' - Get the FQDN for the connection or local system. |
ef416fc2 | 574 | * |
757d2cad | 575 | * When "http" points to a connected socket, return the hostname or |
576 | * address that was used in the call to httpConnect() or httpConnectEncrypt(). | |
577 | * Otherwise, return the FQDN for the local system using both gethostname() | |
578 | * and gethostbyname() to get the local hostname with domain. | |
ef416fc2 | 579 | * |
426c6a59 | 580 | * @since CUPS 1.2/Mac OS X 10.5@ |
ef416fc2 | 581 | */ |
582 | ||
757d2cad | 583 | const char * /* O - FQDN for connection or system */ |
584 | httpGetHostname(http_t *http, /* I - HTTP connection or NULL */ | |
585 | char *s, /* I - String buffer for name */ | |
586 | int slen) /* I - Size of buffer */ | |
ef416fc2 | 587 | { |
89d46774 | 588 | if (!s || slen <= 1) |
589 | return (NULL); | |
590 | ||
757d2cad | 591 | if (http) |
480ef0fe | 592 | { |
593 | if (http->hostname[0] == '/') | |
594 | strlcpy(s, "localhost", slen); | |
595 | else | |
596 | strlcpy(s, http->hostname, slen); | |
597 | } | |
757d2cad | 598 | else |
ef416fc2 | 599 | { |
600 | /* | |
757d2cad | 601 | * Get the hostname... |
ef416fc2 | 602 | */ |
603 | ||
89d46774 | 604 | if (gethostname(s, slen) < 0) |
605 | strlcpy(s, "localhost", slen); | |
757d2cad | 606 | |
607 | if (!strchr(s, '.')) | |
608 | { | |
1106b00e MS |
609 | #ifdef HAVE_SYSTEMCONFIGURATION |
610 | /* | |
611 | * The hostname is not a FQDN, so use the local hostname from the | |
612 | * SystemConfiguration framework... | |
613 | */ | |
614 | ||
615 | SCDynamicStoreRef sc = SCDynamicStoreCreate(kCFAllocatorDefault, | |
616 | CFSTR("libcups"), NULL, NULL); | |
617 | /* System configuration data */ | |
618 | CFStringRef local = sc ? SCDynamicStoreCopyLocalHostName(sc) : NULL; | |
619 | /* Local host name */ | |
620 | char localStr[1024]; /* Local host name C string */ | |
621 | ||
622 | if (local && CFStringGetCString(local, localStr, sizeof(localStr), | |
623 | kCFStringEncodingUTF8)) | |
624 | { | |
625 | /* | |
626 | * Append ".local." to the hostname we get... | |
627 | */ | |
628 | ||
629 | snprintf(s, slen, "%s.local.", localStr); | |
630 | } | |
631 | ||
632 | if (local) | |
633 | CFRelease(local); | |
634 | if (sc) | |
635 | CFRelease(sc); | |
636 | ||
637 | #else | |
757d2cad | 638 | /* |
639 | * The hostname is not a FQDN, so look it up... | |
640 | */ | |
641 | ||
1106b00e MS |
642 | struct hostent *host; /* Host entry to get FQDN */ |
643 | ||
89d46774 | 644 | if ((host = gethostbyname(s)) != NULL && host->h_name) |
1106b00e MS |
645 | { |
646 | /* | |
647 | * Use the resolved hostname... | |
648 | */ | |
649 | ||
757d2cad | 650 | strlcpy(s, host->h_name, slen); |
1106b00e MS |
651 | } |
652 | #endif /* HAVE_SYSTEMCONFIGURATION */ | |
757d2cad | 653 | } |
ef416fc2 | 654 | } |
655 | ||
656 | /* | |
657 | * Return the hostname with as much domain info as we have... | |
658 | */ | |
659 | ||
660 | return (s); | |
661 | } | |
662 | ||
663 | ||
664 | /* | |
b19ccc9e | 665 | * End of "$Id: http-addr.c 7910 2008-09-06 00:25:17Z mike $". |
ef416fc2 | 666 | */ |