ef416fc2 |
1 | /* |
bc44d920 |
2 | * "$Id: http-addr.c 6649 2007-07-11 21:46:42Z mike $" |
ef416fc2 |
3 | * |
4 | * HTTP address routines for the Common UNIX Printing System (CUPS). |
5 | * |
bc44d920 |
6 | * Copyright 2007 by Apple Inc. |
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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. |
21 | * httpAddrString() - Convert an IP address to a dotted string. |
22 | * httpGetHostByName() - Lookup a hostname or IP address, and return |
23 | * address records for the specified name. |
24 | * httpGetHostname() - Get the FQDN for the local system. |
25 | */ |
26 | |
27 | /* |
28 | * Include necessary headers... |
29 | */ |
30 | |
31 | #include "globals.h" |
32 | #include "debug.h" |
33 | #include <stdlib.h> |
34 | #include <stddef.h> |
35 | |
36 | |
37 | /* |
38 | * 'httpAddrAny()' - Check for the "any" address. |
39 | * |
40 | * @since CUPS 1.2@ |
41 | */ |
42 | |
43 | int /* O - 1 if "any", 0 otherwise */ |
44 | httpAddrAny(const http_addr_t *addr) /* I - Address to check */ |
45 | { |
89d46774 |
46 | if (!addr) |
47 | return (0); |
48 | |
ef416fc2 |
49 | #ifdef AF_INET6 |
50 | if (addr->addr.sa_family == AF_INET6 && |
51 | IN6_IS_ADDR_UNSPECIFIED(&(addr->ipv6.sin6_addr))) |
52 | return (1); |
53 | #endif /* AF_INET6 */ |
54 | |
55 | if (addr->addr.sa_family == AF_INET && |
56 | ntohl(addr->ipv4.sin_addr.s_addr) == 0x00000000) |
57 | return (1); |
58 | |
59 | return (0); |
60 | } |
61 | |
62 | |
63 | /* |
64 | * 'httpAddrEqual()' - Compare two addresses. |
65 | * |
66 | * @since CUPS 1.2@ |
67 | */ |
68 | |
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69 | int /* O - 1 if equal, 0 if not */ |
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70 | httpAddrEqual(const http_addr_t *addr1, /* I - First address */ |
71 | const http_addr_t *addr2) /* I - Second address */ |
72 | { |
89d46774 |
73 | if (!addr1 && !addr2) |
74 | return (1); |
75 | |
76 | if (!addr1 || !addr2) |
77 | return (0); |
78 | |
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79 | if (addr1->addr.sa_family != addr2->addr.sa_family) |
80 | return (0); |
81 | |
82 | #ifdef AF_LOCAL |
83 | if (addr1->addr.sa_family == AF_LOCAL) |
84 | return (!strcmp(addr1->un.sun_path, addr2->un.sun_path)); |
85 | #endif /* AF_LOCAL */ |
86 | |
87 | #ifdef AF_INET6 |
88 | if (addr1->addr.sa_family == AF_INET6) |
89 | return (!memcmp(&(addr1->ipv6.sin6_addr), &(addr2->ipv6.sin6_addr), 16)); |
90 | #endif /* AF_INET6 */ |
91 | |
92 | return (addr1->ipv4.sin_addr.s_addr == addr2->ipv4.sin_addr.s_addr); |
93 | } |
94 | |
95 | |
96 | /* |
97 | * 'httpAddrLength()' - Return the length of the address in bytes. |
98 | * |
99 | * @since CUPS 1.2@ |
100 | */ |
101 | |
102 | int /* O - Length in bytes */ |
103 | httpAddrLength(const http_addr_t *addr) /* I - Address */ |
104 | { |
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105 | if (!addr) |
106 | return (0); |
107 | |
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108 | #ifdef AF_INET6 |
109 | if (addr->addr.sa_family == AF_INET6) |
110 | return (sizeof(addr->ipv6)); |
111 | else |
112 | #endif /* AF_INET6 */ |
113 | #ifdef AF_LOCAL |
114 | if (addr->addr.sa_family == AF_LOCAL) |
115 | return (offsetof(struct sockaddr_un, sun_path) + |
116 | strlen(addr->un.sun_path) + 1); |
117 | else |
118 | #endif /* AF_LOCAL */ |
119 | if (addr->addr.sa_family == AF_INET) |
120 | return (sizeof(addr->ipv4)); |
121 | else |
122 | return (0); |
123 | |
124 | } |
125 | |
126 | |
127 | /* |
128 | * 'httpAddrLocalhost()' - Check for the local loopback address. |
129 | * |
130 | * @since CUPS 1.2@ |
131 | */ |
132 | |
133 | int /* O - 1 if local host, 0 otherwise */ |
134 | httpAddrLocalhost( |
135 | const http_addr_t *addr) /* I - Address to check */ |
136 | { |
89d46774 |
137 | if (!addr) |
138 | return (1); |
139 | |
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140 | #ifdef AF_INET6 |
141 | if (addr->addr.sa_family == AF_INET6 && |
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142 | IN6_IS_ADDR_LOOPBACK(&(addr->ipv6.sin6_addr))) |
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143 | return (1); |
144 | #endif /* AF_INET6 */ |
145 | |
146 | #ifdef AF_LOCAL |
147 | if (addr->addr.sa_family == AF_LOCAL) |
148 | return (1); |
149 | #endif /* AF_LOCAL */ |
150 | |
151 | if (addr->addr.sa_family == AF_INET && |
152 | ntohl(addr->ipv4.sin_addr.s_addr) == 0x7f000001) |
153 | return (1); |
154 | |
155 | return (0); |
156 | } |
157 | |
158 | |
159 | #ifdef __sgi |
160 | # define ADDR_CAST (struct sockaddr *) |
161 | #else |
162 | # define ADDR_CAST (char *) |
163 | #endif /* __sgi */ |
164 | |
165 | |
166 | /* |
167 | * 'httpAddrLookup()' - Lookup the hostname associated with the address. |
168 | * |
169 | * @since CUPS 1.2@ |
170 | */ |
171 | |
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172 | char * /* O - Host name */ |
173 | httpAddrLookup( |
174 | const http_addr_t *addr, /* I - Address to lookup */ |
175 | char *name, /* I - Host name buffer */ |
176 | int namelen) /* I - Size of name buffer */ |
ef416fc2 |
177 | { |
178 | DEBUG_printf(("httpAddrLookup(addr=%p, name=%p, namelen=%d)\n", |
179 | addr, name, namelen)); |
180 | |
181 | /* |
182 | * Range check input... |
183 | */ |
184 | |
185 | if (!addr || !name || namelen <= 2) |
186 | { |
187 | if (name && namelen >= 1) |
188 | *name = '\0'; |
189 | |
190 | return (NULL); |
191 | } |
192 | |
193 | #ifdef AF_LOCAL |
194 | if (addr->addr.sa_family == AF_LOCAL) |
195 | strlcpy(name, addr->un.sun_path, namelen); |
196 | else |
197 | #endif /* AF_LOCAL */ |
198 | #ifdef HAVE_GETNAMEINFO |
199 | { |
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200 | if (getnameinfo(&addr->addr, httpAddrLength(addr), name, namelen, |
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201 | NULL, 0, 0)) |
ef416fc2 |
202 | { |
203 | /* |
204 | * If we get an error back, then the address type is not supported |
205 | * and we should zero out the buffer... |
206 | */ |
207 | |
208 | name[0] = '\0'; |
209 | |
210 | return (NULL); |
211 | } |
212 | } |
213 | #else |
214 | { |
215 | struct hostent *host; /* Host from name service */ |
216 | |
217 | |
218 | # ifdef AF_INET6 |
219 | if (addr->addr.sa_family == AF_INET6) |
220 | host = gethostbyaddr(ADDR_CAST &(addr->ipv6.sin6_addr), |
221 | sizeof(struct in_addr), AF_INET6); |
222 | else |
223 | # endif /* AF_INET6 */ |
224 | host = gethostbyaddr(ADDR_CAST &(addr->ipv4.sin_addr), |
225 | sizeof(struct in_addr), AF_INET); |
226 | |
227 | if (host == NULL) |
228 | { |
229 | /* |
230 | * No hostname, so return the raw address... |
231 | */ |
232 | |
233 | httpAddrString(addr, name, namelen); |
234 | return (NULL); |
235 | } |
236 | |
237 | strlcpy(name, host->h_name, namelen); |
238 | } |
239 | #endif /* HAVE_GETNAMEINFO */ |
240 | |
241 | return (name); |
242 | } |
243 | |
244 | |
245 | /* |
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246 | * 'httpAddrString()' - Convert an address to a numeric string. |
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247 | * |
248 | * @since CUPS 1.2@ |
249 | */ |
250 | |
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251 | char * /* O - Numeric address string */ |
252 | httpAddrString(const http_addr_t *addr, /* I - Address to convert */ |
253 | char *s, /* I - String buffer */ |
254 | int slen) /* I - Length of string */ |
ef416fc2 |
255 | { |
256 | DEBUG_printf(("httpAddrString(addr=%p, s=%p, slen=%d)\n", |
257 | addr, s, slen)); |
258 | |
259 | /* |
260 | * Range check input... |
261 | */ |
262 | |
263 | if (!addr || !s || slen <= 2) |
264 | { |
265 | if (s && slen >= 1) |
266 | *s = '\0'; |
267 | |
268 | return (NULL); |
269 | } |
270 | |
271 | #ifdef AF_LOCAL |
272 | if (addr->addr.sa_family == AF_LOCAL) |
273 | strlcpy(s, addr->un.sun_path, slen); |
274 | else |
275 | #endif /* AF_LOCAL */ |
b423cd4c |
276 | if (addr->addr.sa_family == AF_INET) |
ef416fc2 |
277 | { |
b423cd4c |
278 | unsigned temp; /* Temporary address */ |
ef416fc2 |
279 | |
280 | |
b423cd4c |
281 | temp = ntohl(addr->ipv4.sin_addr.s_addr); |
282 | |
283 | snprintf(s, slen, "%d.%d.%d.%d", (temp >> 24) & 255, |
284 | (temp >> 16) & 255, (temp >> 8) & 255, temp & 255); |
285 | } |
286 | #ifdef AF_INET6 |
287 | else if (addr->addr.sa_family == AF_INET6) |
288 | { |
289 | # ifdef HAVE_GETNAMEINFO |
ef416fc2 |
290 | if (getnameinfo(&addr->addr, httpAddrLength(addr), s, slen, |
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291 | NULL, 0, NI_NUMERICHOST)) |
ef416fc2 |
292 | { |
293 | /* |
294 | * If we get an error back, then the address type is not supported |
295 | * and we should zero out the buffer... |
296 | */ |
297 | |
298 | s[0] = '\0'; |
299 | |
300 | return (NULL); |
301 | } |
b423cd4c |
302 | # else |
303 | char *sptr; /* Pointer into string */ |
304 | int i; /* Looping var */ |
305 | unsigned temp; /* Current value */ |
306 | const char *prefix; /* Prefix for address */ |
307 | |
308 | |
309 | prefix = ""; |
310 | for (sptr = s, i = 0; i < 4 && addr->ipv6.sin6_addr.s6_addr32[i]; i ++) |
ef416fc2 |
311 | { |
b423cd4c |
312 | temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]); |
ef416fc2 |
313 | |
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314 | snprintf(sptr, slen, "%s%x", prefix, (temp >> 16) & 0xffff); |
315 | prefix = ":"; |
316 | slen -= strlen(sptr); |
317 | sptr += strlen(sptr); |
ef416fc2 |
318 | |
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319 | temp &= 0xffff; |
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320 | |
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321 | if (temp || i == 3 || addr->ipv6.sin6_addr.s6_addr32[i + 1]) |
322 | { |
323 | snprintf(sptr, slen, "%s%x", prefix, temp); |
ef416fc2 |
324 | slen -= strlen(sptr); |
325 | sptr += strlen(sptr); |
ef416fc2 |
326 | } |
b423cd4c |
327 | } |
328 | |
329 | if (i < 4) |
330 | { |
331 | while (i < 4 && !addr->ipv6.sin6_addr.s6_addr32[i]) |
332 | i ++; |
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333 | |
334 | if (i < 4) |
335 | { |
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336 | snprintf(sptr, slen, "%s:", prefix); |
337 | prefix = ":"; |
338 | slen -= strlen(sptr); |
339 | sptr += strlen(sptr); |
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340 | |
b423cd4c |
341 | for (; i < 4; i ++) |
ef416fc2 |
342 | { |
b423cd4c |
343 | temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]); |
ef416fc2 |
344 | |
b423cd4c |
345 | if ((temp & 0xffff0000) || addr->ipv6.sin6_addr.s6_addr32[i - 1]) |
ef416fc2 |
346 | { |
b423cd4c |
347 | snprintf(sptr, slen, "%s%x", prefix, (temp >> 16) & 0xffff); |
ef416fc2 |
348 | slen -= strlen(sptr); |
349 | sptr += strlen(sptr); |
b423cd4c |
350 | } |
ef416fc2 |
351 | |
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352 | snprintf(sptr, slen, "%s%x", prefix, temp & 0xffff); |
353 | slen -= strlen(sptr); |
354 | sptr += strlen(sptr); |
ef416fc2 |
355 | } |
356 | } |
b423cd4c |
357 | else if (sptr == s) |
358 | { |
359 | /* |
360 | * Empty address... |
361 | */ |
ef416fc2 |
362 | |
b423cd4c |
363 | strlcpy(s, "::", slen); |
364 | sptr = s + 2; |
365 | slen -= 2; |
366 | } |
367 | else |
368 | { |
369 | /* |
370 | * Empty at end... |
371 | */ |
ef416fc2 |
372 | |
b423cd4c |
373 | strlcpy(sptr, "::", slen); |
374 | sptr += 2; |
375 | slen -= 2; |
376 | } |
ef416fc2 |
377 | } |
b423cd4c |
378 | # endif /* HAVE_GETNAMEINFO */ |
ef416fc2 |
379 | } |
b423cd4c |
380 | #endif /* AF_INET6 */ |
381 | else |
382 | strlcpy(s, "UNKNOWN", slen); |
ef416fc2 |
383 | |
384 | DEBUG_printf(("httpAddrString: returning \"%s\"...\n", s)); |
385 | |
386 | return (s); |
387 | } |
388 | |
389 | |
390 | /* |
391 | * 'httpGetHostByName()' - Lookup a hostname or IPv4 address, and return |
392 | * address records for the specified name. |
393 | * |
394 | * @deprecated@ |
395 | */ |
396 | |
397 | struct hostent * /* O - Host entry */ |
398 | httpGetHostByName(const char *name) /* I - Hostname or IP address */ |
399 | { |
400 | const char *nameptr; /* Pointer into name */ |
401 | unsigned ip[4]; /* IP address components */ |
402 | _cups_globals_t *cg = _cupsGlobals(); |
403 | /* Pointer to library globals */ |
404 | |
405 | |
406 | DEBUG_printf(("httpGetHostByName(name=\"%s\")\n", name)); |
407 | |
408 | /* |
409 | * Avoid lookup delays and configuration problems when connecting |
410 | * to the localhost address... |
411 | */ |
412 | |
413 | if (!strcmp(name, "localhost")) |
414 | name = "127.0.0.1"; |
415 | |
416 | /* |
417 | * This function is needed because some operating systems have a |
418 | * buggy implementation of gethostbyname() that does not support |
419 | * IP addresses. If the first character of the name string is a |
420 | * number, then sscanf() is used to extract the IP components. |
421 | * We then pack the components into an IPv4 address manually, |
422 | * since the inet_aton() function is deprecated. We use the |
423 | * htonl() macro to get the right byte order for the address. |
424 | * |
425 | * We also support domain sockets when supported by the underlying |
426 | * OS... |
427 | */ |
428 | |
429 | #ifdef AF_LOCAL |
430 | if (name[0] == '/') |
431 | { |
432 | /* |
433 | * A domain socket address, so make an AF_LOCAL entry and return it... |
434 | */ |
435 | |
436 | cg->hostent.h_name = (char *)name; |
437 | cg->hostent.h_aliases = NULL; |
438 | cg->hostent.h_addrtype = AF_LOCAL; |
439 | cg->hostent.h_length = strlen(name) + 1; |
440 | cg->hostent.h_addr_list = cg->ip_ptrs; |
441 | cg->ip_ptrs[0] = (char *)name; |
442 | cg->ip_ptrs[1] = NULL; |
443 | |
444 | DEBUG_puts("httpGetHostByName: returning domain socket address..."); |
445 | |
446 | return (&cg->hostent); |
447 | } |
448 | #endif /* AF_LOCAL */ |
449 | |
450 | for (nameptr = name; isdigit(*nameptr & 255) || *nameptr == '.'; nameptr ++); |
451 | |
452 | if (!*nameptr) |
453 | { |
454 | /* |
455 | * We have an IPv4 address; break it up and provide the host entry |
456 | * to the caller. |
457 | */ |
458 | |
459 | if (sscanf(name, "%u.%u.%u.%u", ip, ip + 1, ip + 2, ip + 3) != 4) |
460 | return (NULL); /* Must have 4 numbers */ |
461 | |
462 | if (ip[0] > 255 || ip[1] > 255 || ip[2] > 255 || ip[3] > 255) |
463 | return (NULL); /* Invalid byte ranges! */ |
464 | |
465 | cg->ip_addr = htonl(((((((ip[0] << 8) | ip[1]) << 8) | ip[2]) << 8) | |
466 | ip[3])); |
467 | |
468 | /* |
469 | * Fill in the host entry and return it... |
470 | */ |
471 | |
472 | cg->hostent.h_name = (char *)name; |
473 | cg->hostent.h_aliases = NULL; |
474 | cg->hostent.h_addrtype = AF_INET; |
475 | cg->hostent.h_length = 4; |
476 | cg->hostent.h_addr_list = cg->ip_ptrs; |
477 | cg->ip_ptrs[0] = (char *)&(cg->ip_addr); |
478 | cg->ip_ptrs[1] = NULL; |
479 | |
480 | DEBUG_puts("httpGetHostByName: returning IPv4 address..."); |
481 | |
482 | return (&cg->hostent); |
483 | } |
484 | else |
485 | { |
486 | /* |
487 | * Use the gethostbyname() function to get the IPv4 address for |
488 | * the name... |
489 | */ |
490 | |
491 | DEBUG_puts("httpGetHostByName: returning domain lookup address(es)..."); |
492 | |
493 | return (gethostbyname(name)); |
494 | } |
495 | } |
496 | |
497 | |
498 | /* |
757d2cad |
499 | * 'httpGetHostname()' - Get the FQDN for the connection or local system. |
ef416fc2 |
500 | * |
757d2cad |
501 | * When "http" points to a connected socket, return the hostname or |
502 | * address that was used in the call to httpConnect() or httpConnectEncrypt(). |
503 | * Otherwise, return the FQDN for the local system using both gethostname() |
504 | * and gethostbyname() to get the local hostname with domain. |
ef416fc2 |
505 | * |
506 | * @since CUPS 1.2@ |
507 | */ |
508 | |
757d2cad |
509 | const char * /* O - FQDN for connection or system */ |
510 | httpGetHostname(http_t *http, /* I - HTTP connection or NULL */ |
511 | char *s, /* I - String buffer for name */ |
512 | int slen) /* I - Size of buffer */ |
ef416fc2 |
513 | { |
514 | struct hostent *host; /* Host entry to get FQDN */ |
515 | |
516 | |
89d46774 |
517 | if (!s || slen <= 1) |
518 | return (NULL); |
519 | |
757d2cad |
520 | if (http) |
480ef0fe |
521 | { |
522 | if (http->hostname[0] == '/') |
523 | strlcpy(s, "localhost", slen); |
524 | else |
525 | strlcpy(s, http->hostname, slen); |
526 | } |
757d2cad |
527 | else |
ef416fc2 |
528 | { |
529 | /* |
757d2cad |
530 | * Get the hostname... |
ef416fc2 |
531 | */ |
532 | |
89d46774 |
533 | if (gethostname(s, slen) < 0) |
534 | strlcpy(s, "localhost", slen); |
757d2cad |
535 | |
536 | if (!strchr(s, '.')) |
537 | { |
538 | /* |
539 | * The hostname is not a FQDN, so look it up... |
540 | */ |
541 | |
89d46774 |
542 | if ((host = gethostbyname(s)) != NULL && host->h_name) |
757d2cad |
543 | strlcpy(s, host->h_name, slen); |
544 | } |
ef416fc2 |
545 | } |
546 | |
547 | /* |
548 | * Return the hostname with as much domain info as we have... |
549 | */ |
550 | |
551 | return (s); |
552 | } |
553 | |
554 | |
555 | /* |
bc44d920 |
556 | * End of "$Id: http-addr.c 6649 2007-07-11 21:46:42Z mike $". |
ef416fc2 |
557 | */ |