]>
Commit | Line | Data |
---|---|---|
ef416fc2 | 1 | /* |
f7faf1f5 | 2 | * "$Id: http-addr.c 5443 2006-04-20 14:50:26Z mike $" |
ef416fc2 | 3 | * |
4 | * HTTP address routines for the Common UNIX Printing System (CUPS). | |
5 | * | |
ecdc0628 | 6 | * Copyright 1997-2006 by Easy Software Products, all rights reserved. |
ef416fc2 | 7 | * |
8 | * These coded instructions, statements, and computer programs are the | |
9 | * property of Easy Software Products and are protected by Federal | |
10 | * copyright law. Distribution and use rights are outlined in the file | |
11 | * "LICENSE.txt" which should have been included with this file. If this | |
12 | * file is missing or damaged please contact Easy Software Products | |
13 | * at: | |
14 | * | |
15 | * Attn: CUPS Licensing Information | |
16 | * Easy Software Products | |
17 | * 44141 Airport View Drive, Suite 204 | |
18 | * Hollywood, Maryland 20636 USA | |
19 | * | |
20 | * Voice: (301) 373-9600 | |
21 | * EMail: cups-info@cups.org | |
22 | * WWW: http://www.cups.org | |
23 | * | |
24 | * Contents: | |
25 | * | |
26 | * httpAddrAny() - Check for the "any" address. | |
27 | * httpAddrEqual() - Compare two addresses. | |
28 | * httpAddrLocalhost() - Check for the local loopback address. | |
29 | * httpAddrLookup() - Lookup the hostname associated with the address. | |
30 | * httpAddrString() - Convert an IP address to a dotted string. | |
31 | * httpGetHostByName() - Lookup a hostname or IP address, and return | |
32 | * address records for the specified name. | |
33 | * httpGetHostname() - Get the FQDN for the local system. | |
34 | */ | |
35 | ||
36 | /* | |
37 | * Include necessary headers... | |
38 | */ | |
39 | ||
40 | #include "globals.h" | |
41 | #include "debug.h" | |
42 | #include <stdlib.h> | |
43 | #include <stddef.h> | |
44 | ||
45 | ||
46 | /* | |
47 | * 'httpAddrAny()' - Check for the "any" address. | |
48 | * | |
49 | * @since CUPS 1.2@ | |
50 | */ | |
51 | ||
52 | int /* O - 1 if "any", 0 otherwise */ | |
53 | httpAddrAny(const http_addr_t *addr) /* I - Address to check */ | |
54 | { | |
89d46774 | 55 | if (!addr) |
56 | return (0); | |
57 | ||
ef416fc2 | 58 | #ifdef AF_INET6 |
59 | if (addr->addr.sa_family == AF_INET6 && | |
60 | IN6_IS_ADDR_UNSPECIFIED(&(addr->ipv6.sin6_addr))) | |
61 | return (1); | |
62 | #endif /* AF_INET6 */ | |
63 | ||
64 | if (addr->addr.sa_family == AF_INET && | |
65 | ntohl(addr->ipv4.sin_addr.s_addr) == 0x00000000) | |
66 | return (1); | |
67 | ||
68 | return (0); | |
69 | } | |
70 | ||
71 | ||
72 | /* | |
73 | * 'httpAddrEqual()' - Compare two addresses. | |
74 | * | |
75 | * @since CUPS 1.2@ | |
76 | */ | |
77 | ||
ecdc0628 | 78 | int /* O - 1 if equal, 0 if not */ |
ef416fc2 | 79 | httpAddrEqual(const http_addr_t *addr1, /* I - First address */ |
80 | const http_addr_t *addr2) /* I - Second address */ | |
81 | { | |
89d46774 | 82 | if (!addr1 && !addr2) |
83 | return (1); | |
84 | ||
85 | if (!addr1 || !addr2) | |
86 | return (0); | |
87 | ||
ef416fc2 | 88 | if (addr1->addr.sa_family != addr2->addr.sa_family) |
89 | return (0); | |
90 | ||
91 | #ifdef AF_LOCAL | |
92 | if (addr1->addr.sa_family == AF_LOCAL) | |
93 | return (!strcmp(addr1->un.sun_path, addr2->un.sun_path)); | |
94 | #endif /* AF_LOCAL */ | |
95 | ||
96 | #ifdef AF_INET6 | |
97 | if (addr1->addr.sa_family == AF_INET6) | |
98 | return (!memcmp(&(addr1->ipv6.sin6_addr), &(addr2->ipv6.sin6_addr), 16)); | |
99 | #endif /* AF_INET6 */ | |
100 | ||
101 | return (addr1->ipv4.sin_addr.s_addr == addr2->ipv4.sin_addr.s_addr); | |
102 | } | |
103 | ||
104 | ||
105 | /* | |
106 | * 'httpAddrLength()' - Return the length of the address in bytes. | |
107 | * | |
108 | * @since CUPS 1.2@ | |
109 | */ | |
110 | ||
111 | int /* O - Length in bytes */ | |
112 | httpAddrLength(const http_addr_t *addr) /* I - Address */ | |
113 | { | |
89d46774 | 114 | if (!addr) |
115 | return (0); | |
116 | ||
ef416fc2 | 117 | #ifdef AF_INET6 |
118 | if (addr->addr.sa_family == AF_INET6) | |
119 | return (sizeof(addr->ipv6)); | |
120 | else | |
121 | #endif /* AF_INET6 */ | |
122 | #ifdef AF_LOCAL | |
123 | if (addr->addr.sa_family == AF_LOCAL) | |
124 | return (offsetof(struct sockaddr_un, sun_path) + | |
125 | strlen(addr->un.sun_path) + 1); | |
126 | else | |
127 | #endif /* AF_LOCAL */ | |
128 | if (addr->addr.sa_family == AF_INET) | |
129 | return (sizeof(addr->ipv4)); | |
130 | else | |
131 | return (0); | |
132 | ||
133 | } | |
134 | ||
135 | ||
136 | /* | |
137 | * 'httpAddrLocalhost()' - Check for the local loopback address. | |
138 | * | |
139 | * @since CUPS 1.2@ | |
140 | */ | |
141 | ||
142 | int /* O - 1 if local host, 0 otherwise */ | |
143 | httpAddrLocalhost( | |
144 | const http_addr_t *addr) /* I - Address to check */ | |
145 | { | |
89d46774 | 146 | if (!addr) |
147 | return (1); | |
148 | ||
ef416fc2 | 149 | #ifdef AF_INET6 |
150 | if (addr->addr.sa_family == AF_INET6 && | |
fa73b229 | 151 | IN6_IS_ADDR_LOOPBACK(&(addr->ipv6.sin6_addr))) |
ef416fc2 | 152 | return (1); |
153 | #endif /* AF_INET6 */ | |
154 | ||
155 | #ifdef AF_LOCAL | |
156 | if (addr->addr.sa_family == AF_LOCAL) | |
157 | return (1); | |
158 | #endif /* AF_LOCAL */ | |
159 | ||
160 | if (addr->addr.sa_family == AF_INET && | |
161 | ntohl(addr->ipv4.sin_addr.s_addr) == 0x7f000001) | |
162 | return (1); | |
163 | ||
164 | return (0); | |
165 | } | |
166 | ||
167 | ||
168 | #ifdef __sgi | |
169 | # define ADDR_CAST (struct sockaddr *) | |
170 | #else | |
171 | # define ADDR_CAST (char *) | |
172 | #endif /* __sgi */ | |
173 | ||
174 | ||
175 | /* | |
176 | * 'httpAddrLookup()' - Lookup the hostname associated with the address. | |
177 | * | |
178 | * @since CUPS 1.2@ | |
179 | */ | |
180 | ||
ecdc0628 | 181 | char * /* O - Host name */ |
182 | httpAddrLookup( | |
183 | const http_addr_t *addr, /* I - Address to lookup */ | |
184 | char *name, /* I - Host name buffer */ | |
185 | int namelen) /* I - Size of name buffer */ | |
ef416fc2 | 186 | { |
187 | DEBUG_printf(("httpAddrLookup(addr=%p, name=%p, namelen=%d)\n", | |
188 | addr, name, namelen)); | |
189 | ||
190 | /* | |
191 | * Range check input... | |
192 | */ | |
193 | ||
194 | if (!addr || !name || namelen <= 2) | |
195 | { | |
196 | if (name && namelen >= 1) | |
197 | *name = '\0'; | |
198 | ||
199 | return (NULL); | |
200 | } | |
201 | ||
202 | #ifdef AF_LOCAL | |
203 | if (addr->addr.sa_family == AF_LOCAL) | |
204 | strlcpy(name, addr->un.sun_path, namelen); | |
205 | else | |
206 | #endif /* AF_LOCAL */ | |
207 | #ifdef HAVE_GETNAMEINFO | |
208 | { | |
ef416fc2 | 209 | if (getnameinfo(&addr->addr, httpAddrLength(addr), name, namelen, |
b423cd4c | 210 | NULL, 0, 0)) |
ef416fc2 | 211 | { |
212 | /* | |
213 | * If we get an error back, then the address type is not supported | |
214 | * and we should zero out the buffer... | |
215 | */ | |
216 | ||
217 | name[0] = '\0'; | |
218 | ||
219 | return (NULL); | |
220 | } | |
221 | } | |
222 | #else | |
223 | { | |
224 | struct hostent *host; /* Host from name service */ | |
225 | ||
226 | ||
227 | # ifdef AF_INET6 | |
228 | if (addr->addr.sa_family == AF_INET6) | |
229 | host = gethostbyaddr(ADDR_CAST &(addr->ipv6.sin6_addr), | |
230 | sizeof(struct in_addr), AF_INET6); | |
231 | else | |
232 | # endif /* AF_INET6 */ | |
233 | host = gethostbyaddr(ADDR_CAST &(addr->ipv4.sin_addr), | |
234 | sizeof(struct in_addr), AF_INET); | |
235 | ||
236 | if (host == NULL) | |
237 | { | |
238 | /* | |
239 | * No hostname, so return the raw address... | |
240 | */ | |
241 | ||
242 | httpAddrString(addr, name, namelen); | |
243 | return (NULL); | |
244 | } | |
245 | ||
246 | strlcpy(name, host->h_name, namelen); | |
247 | } | |
248 | #endif /* HAVE_GETNAMEINFO */ | |
249 | ||
250 | return (name); | |
251 | } | |
252 | ||
253 | ||
254 | /* | |
ecdc0628 | 255 | * 'httpAddrString()' - Convert an address to a numeric string. |
ef416fc2 | 256 | * |
257 | * @since CUPS 1.2@ | |
258 | */ | |
259 | ||
ecdc0628 | 260 | char * /* O - Numeric address string */ |
261 | httpAddrString(const http_addr_t *addr, /* I - Address to convert */ | |
262 | char *s, /* I - String buffer */ | |
263 | int slen) /* I - Length of string */ | |
ef416fc2 | 264 | { |
265 | DEBUG_printf(("httpAddrString(addr=%p, s=%p, slen=%d)\n", | |
266 | addr, s, slen)); | |
267 | ||
268 | /* | |
269 | * Range check input... | |
270 | */ | |
271 | ||
272 | if (!addr || !s || slen <= 2) | |
273 | { | |
274 | if (s && slen >= 1) | |
275 | *s = '\0'; | |
276 | ||
277 | return (NULL); | |
278 | } | |
279 | ||
280 | #ifdef AF_LOCAL | |
281 | if (addr->addr.sa_family == AF_LOCAL) | |
282 | strlcpy(s, addr->un.sun_path, slen); | |
283 | else | |
284 | #endif /* AF_LOCAL */ | |
b423cd4c | 285 | if (addr->addr.sa_family == AF_INET) |
ef416fc2 | 286 | { |
b423cd4c | 287 | unsigned temp; /* Temporary address */ |
ef416fc2 | 288 | |
289 | ||
b423cd4c | 290 | temp = ntohl(addr->ipv4.sin_addr.s_addr); |
291 | ||
292 | snprintf(s, slen, "%d.%d.%d.%d", (temp >> 24) & 255, | |
293 | (temp >> 16) & 255, (temp >> 8) & 255, temp & 255); | |
294 | } | |
295 | #ifdef AF_INET6 | |
296 | else if (addr->addr.sa_family == AF_INET6) | |
297 | { | |
298 | # ifdef HAVE_GETNAMEINFO | |
ef416fc2 | 299 | if (getnameinfo(&addr->addr, httpAddrLength(addr), s, slen, |
b423cd4c | 300 | NULL, 0, NI_NUMERICHOST)) |
ef416fc2 | 301 | { |
302 | /* | |
303 | * If we get an error back, then the address type is not supported | |
304 | * and we should zero out the buffer... | |
305 | */ | |
306 | ||
307 | s[0] = '\0'; | |
308 | ||
309 | return (NULL); | |
310 | } | |
b423cd4c | 311 | # else |
312 | char *sptr; /* Pointer into string */ | |
313 | int i; /* Looping var */ | |
314 | unsigned temp; /* Current value */ | |
315 | const char *prefix; /* Prefix for address */ | |
316 | ||
317 | ||
318 | prefix = ""; | |
319 | for (sptr = s, i = 0; i < 4 && addr->ipv6.sin6_addr.s6_addr32[i]; i ++) | |
ef416fc2 | 320 | { |
b423cd4c | 321 | temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]); |
ef416fc2 | 322 | |
b423cd4c | 323 | snprintf(sptr, slen, "%s%x", prefix, (temp >> 16) & 0xffff); |
324 | prefix = ":"; | |
325 | slen -= strlen(sptr); | |
326 | sptr += strlen(sptr); | |
ef416fc2 | 327 | |
b423cd4c | 328 | temp &= 0xffff; |
ef416fc2 | 329 | |
b423cd4c | 330 | if (temp || i == 3 || addr->ipv6.sin6_addr.s6_addr32[i + 1]) |
331 | { | |
332 | snprintf(sptr, slen, "%s%x", prefix, temp); | |
ef416fc2 | 333 | slen -= strlen(sptr); |
334 | sptr += strlen(sptr); | |
ef416fc2 | 335 | } |
b423cd4c | 336 | } |
337 | ||
338 | if (i < 4) | |
339 | { | |
340 | while (i < 4 && !addr->ipv6.sin6_addr.s6_addr32[i]) | |
341 | i ++; | |
ef416fc2 | 342 | |
343 | if (i < 4) | |
344 | { | |
b423cd4c | 345 | snprintf(sptr, slen, "%s:", prefix); |
346 | prefix = ":"; | |
347 | slen -= strlen(sptr); | |
348 | sptr += strlen(sptr); | |
ef416fc2 | 349 | |
b423cd4c | 350 | for (; i < 4; i ++) |
ef416fc2 | 351 | { |
b423cd4c | 352 | temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]); |
ef416fc2 | 353 | |
b423cd4c | 354 | if ((temp & 0xffff0000) || addr->ipv6.sin6_addr.s6_addr32[i - 1]) |
ef416fc2 | 355 | { |
b423cd4c | 356 | snprintf(sptr, slen, "%s%x", prefix, (temp >> 16) & 0xffff); |
ef416fc2 | 357 | slen -= strlen(sptr); |
358 | sptr += strlen(sptr); | |
b423cd4c | 359 | } |
ef416fc2 | 360 | |
b423cd4c | 361 | snprintf(sptr, slen, "%s%x", prefix, temp & 0xffff); |
362 | slen -= strlen(sptr); | |
363 | sptr += strlen(sptr); | |
ef416fc2 | 364 | } |
365 | } | |
b423cd4c | 366 | else if (sptr == s) |
367 | { | |
368 | /* | |
369 | * Empty address... | |
370 | */ | |
ef416fc2 | 371 | |
b423cd4c | 372 | strlcpy(s, "::", slen); |
373 | sptr = s + 2; | |
374 | slen -= 2; | |
375 | } | |
376 | else | |
377 | { | |
378 | /* | |
379 | * Empty at end... | |
380 | */ | |
ef416fc2 | 381 | |
b423cd4c | 382 | strlcpy(sptr, "::", slen); |
383 | sptr += 2; | |
384 | slen -= 2; | |
385 | } | |
ef416fc2 | 386 | } |
b423cd4c | 387 | # endif /* HAVE_GETNAMEINFO */ |
ef416fc2 | 388 | } |
b423cd4c | 389 | #endif /* AF_INET6 */ |
390 | else | |
391 | strlcpy(s, "UNKNOWN", slen); | |
ef416fc2 | 392 | |
393 | DEBUG_printf(("httpAddrString: returning \"%s\"...\n", s)); | |
394 | ||
395 | return (s); | |
396 | } | |
397 | ||
398 | ||
399 | /* | |
400 | * 'httpGetHostByName()' - Lookup a hostname or IPv4 address, and return | |
401 | * address records for the specified name. | |
402 | * | |
403 | * @deprecated@ | |
404 | */ | |
405 | ||
406 | struct hostent * /* O - Host entry */ | |
407 | httpGetHostByName(const char *name) /* I - Hostname or IP address */ | |
408 | { | |
409 | const char *nameptr; /* Pointer into name */ | |
410 | unsigned ip[4]; /* IP address components */ | |
411 | _cups_globals_t *cg = _cupsGlobals(); | |
412 | /* Pointer to library globals */ | |
413 | ||
414 | ||
415 | DEBUG_printf(("httpGetHostByName(name=\"%s\")\n", name)); | |
416 | ||
417 | /* | |
418 | * Avoid lookup delays and configuration problems when connecting | |
419 | * to the localhost address... | |
420 | */ | |
421 | ||
422 | if (!strcmp(name, "localhost")) | |
423 | name = "127.0.0.1"; | |
424 | ||
425 | /* | |
426 | * This function is needed because some operating systems have a | |
427 | * buggy implementation of gethostbyname() that does not support | |
428 | * IP addresses. If the first character of the name string is a | |
429 | * number, then sscanf() is used to extract the IP components. | |
430 | * We then pack the components into an IPv4 address manually, | |
431 | * since the inet_aton() function is deprecated. We use the | |
432 | * htonl() macro to get the right byte order for the address. | |
433 | * | |
434 | * We also support domain sockets when supported by the underlying | |
435 | * OS... | |
436 | */ | |
437 | ||
438 | #ifdef AF_LOCAL | |
439 | if (name[0] == '/') | |
440 | { | |
441 | /* | |
442 | * A domain socket address, so make an AF_LOCAL entry and return it... | |
443 | */ | |
444 | ||
445 | cg->hostent.h_name = (char *)name; | |
446 | cg->hostent.h_aliases = NULL; | |
447 | cg->hostent.h_addrtype = AF_LOCAL; | |
448 | cg->hostent.h_length = strlen(name) + 1; | |
449 | cg->hostent.h_addr_list = cg->ip_ptrs; | |
450 | cg->ip_ptrs[0] = (char *)name; | |
451 | cg->ip_ptrs[1] = NULL; | |
452 | ||
453 | DEBUG_puts("httpGetHostByName: returning domain socket address..."); | |
454 | ||
455 | return (&cg->hostent); | |
456 | } | |
457 | #endif /* AF_LOCAL */ | |
458 | ||
459 | for (nameptr = name; isdigit(*nameptr & 255) || *nameptr == '.'; nameptr ++); | |
460 | ||
461 | if (!*nameptr) | |
462 | { | |
463 | /* | |
464 | * We have an IPv4 address; break it up and provide the host entry | |
465 | * to the caller. | |
466 | */ | |
467 | ||
468 | if (sscanf(name, "%u.%u.%u.%u", ip, ip + 1, ip + 2, ip + 3) != 4) | |
469 | return (NULL); /* Must have 4 numbers */ | |
470 | ||
471 | if (ip[0] > 255 || ip[1] > 255 || ip[2] > 255 || ip[3] > 255) | |
472 | return (NULL); /* Invalid byte ranges! */ | |
473 | ||
474 | cg->ip_addr = htonl(((((((ip[0] << 8) | ip[1]) << 8) | ip[2]) << 8) | | |
475 | ip[3])); | |
476 | ||
477 | /* | |
478 | * Fill in the host entry and return it... | |
479 | */ | |
480 | ||
481 | cg->hostent.h_name = (char *)name; | |
482 | cg->hostent.h_aliases = NULL; | |
483 | cg->hostent.h_addrtype = AF_INET; | |
484 | cg->hostent.h_length = 4; | |
485 | cg->hostent.h_addr_list = cg->ip_ptrs; | |
486 | cg->ip_ptrs[0] = (char *)&(cg->ip_addr); | |
487 | cg->ip_ptrs[1] = NULL; | |
488 | ||
489 | DEBUG_puts("httpGetHostByName: returning IPv4 address..."); | |
490 | ||
491 | return (&cg->hostent); | |
492 | } | |
493 | else | |
494 | { | |
495 | /* | |
496 | * Use the gethostbyname() function to get the IPv4 address for | |
497 | * the name... | |
498 | */ | |
499 | ||
500 | DEBUG_puts("httpGetHostByName: returning domain lookup address(es)..."); | |
501 | ||
502 | return (gethostbyname(name)); | |
503 | } | |
504 | } | |
505 | ||
506 | ||
507 | /* | |
757d2cad | 508 | * 'httpGetHostname()' - Get the FQDN for the connection or local system. |
ef416fc2 | 509 | * |
757d2cad | 510 | * When "http" points to a connected socket, return the hostname or |
511 | * address that was used in the call to httpConnect() or httpConnectEncrypt(). | |
512 | * Otherwise, return the FQDN for the local system using both gethostname() | |
513 | * and gethostbyname() to get the local hostname with domain. | |
ef416fc2 | 514 | * |
515 | * @since CUPS 1.2@ | |
516 | */ | |
517 | ||
757d2cad | 518 | const char * /* O - FQDN for connection or system */ |
519 | httpGetHostname(http_t *http, /* I - HTTP connection or NULL */ | |
520 | char *s, /* I - String buffer for name */ | |
521 | int slen) /* I - Size of buffer */ | |
ef416fc2 | 522 | { |
523 | struct hostent *host; /* Host entry to get FQDN */ | |
524 | ||
525 | ||
89d46774 | 526 | if (!s || slen <= 1) |
527 | return (NULL); | |
528 | ||
757d2cad | 529 | if (http) |
480ef0fe | 530 | { |
531 | if (http->hostname[0] == '/') | |
532 | strlcpy(s, "localhost", slen); | |
533 | else | |
534 | strlcpy(s, http->hostname, slen); | |
535 | } | |
757d2cad | 536 | else |
ef416fc2 | 537 | { |
538 | /* | |
757d2cad | 539 | * Get the hostname... |
ef416fc2 | 540 | */ |
541 | ||
89d46774 | 542 | if (gethostname(s, slen) < 0) |
543 | strlcpy(s, "localhost", slen); | |
757d2cad | 544 | |
545 | if (!strchr(s, '.')) | |
546 | { | |
547 | /* | |
548 | * The hostname is not a FQDN, so look it up... | |
549 | */ | |
550 | ||
89d46774 | 551 | if ((host = gethostbyname(s)) != NULL && host->h_name) |
757d2cad | 552 | strlcpy(s, host->h_name, slen); |
553 | } | |
ef416fc2 | 554 | } |
555 | ||
556 | /* | |
557 | * Return the hostname with as much domain info as we have... | |
558 | */ | |
559 | ||
560 | return (s); | |
561 | } | |
562 | ||
563 | ||
564 | /* | |
f7faf1f5 | 565 | * End of "$Id: http-addr.c 5443 2006-04-20 14:50:26Z mike $". |
ef416fc2 | 566 | */ |