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ef416fc2 | 1 | /* |
480ef0fe | 2 | * "$Id: http-addr.c 5251 2006-03-08 18:34:07Z 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 | { | |
55 | #ifdef AF_INET6 | |
56 | if (addr->addr.sa_family == AF_INET6 && | |
57 | IN6_IS_ADDR_UNSPECIFIED(&(addr->ipv6.sin6_addr))) | |
58 | return (1); | |
59 | #endif /* AF_INET6 */ | |
60 | ||
61 | if (addr->addr.sa_family == AF_INET && | |
62 | ntohl(addr->ipv4.sin_addr.s_addr) == 0x00000000) | |
63 | return (1); | |
64 | ||
65 | return (0); | |
66 | } | |
67 | ||
68 | ||
69 | /* | |
70 | * 'httpAddrEqual()' - Compare two addresses. | |
71 | * | |
72 | * @since CUPS 1.2@ | |
73 | */ | |
74 | ||
ecdc0628 | 75 | int /* O - 1 if equal, 0 if not */ |
ef416fc2 | 76 | httpAddrEqual(const http_addr_t *addr1, /* I - First address */ |
77 | const http_addr_t *addr2) /* I - Second address */ | |
78 | { | |
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 | { | |
105 | #ifdef AF_INET6 | |
106 | if (addr->addr.sa_family == AF_INET6) | |
107 | return (sizeof(addr->ipv6)); | |
108 | else | |
109 | #endif /* AF_INET6 */ | |
110 | #ifdef AF_LOCAL | |
111 | if (addr->addr.sa_family == AF_LOCAL) | |
112 | return (offsetof(struct sockaddr_un, sun_path) + | |
113 | strlen(addr->un.sun_path) + 1); | |
114 | else | |
115 | #endif /* AF_LOCAL */ | |
116 | if (addr->addr.sa_family == AF_INET) | |
117 | return (sizeof(addr->ipv4)); | |
118 | else | |
119 | return (0); | |
120 | ||
121 | } | |
122 | ||
123 | ||
124 | /* | |
125 | * 'httpAddrLocalhost()' - Check for the local loopback address. | |
126 | * | |
127 | * @since CUPS 1.2@ | |
128 | */ | |
129 | ||
130 | int /* O - 1 if local host, 0 otherwise */ | |
131 | httpAddrLocalhost( | |
132 | const http_addr_t *addr) /* I - Address to check */ | |
133 | { | |
134 | #ifdef AF_INET6 | |
135 | if (addr->addr.sa_family == AF_INET6 && | |
fa73b229 | 136 | IN6_IS_ADDR_LOOPBACK(&(addr->ipv6.sin6_addr))) |
ef416fc2 | 137 | return (1); |
138 | #endif /* AF_INET6 */ | |
139 | ||
140 | #ifdef AF_LOCAL | |
141 | if (addr->addr.sa_family == AF_LOCAL) | |
142 | return (1); | |
143 | #endif /* AF_LOCAL */ | |
144 | ||
145 | if (addr->addr.sa_family == AF_INET && | |
146 | ntohl(addr->ipv4.sin_addr.s_addr) == 0x7f000001) | |
147 | return (1); | |
148 | ||
149 | return (0); | |
150 | } | |
151 | ||
152 | ||
153 | #ifdef __sgi | |
154 | # define ADDR_CAST (struct sockaddr *) | |
155 | #else | |
156 | # define ADDR_CAST (char *) | |
157 | #endif /* __sgi */ | |
158 | ||
159 | ||
160 | /* | |
161 | * 'httpAddrLookup()' - Lookup the hostname associated with the address. | |
162 | * | |
163 | * @since CUPS 1.2@ | |
164 | */ | |
165 | ||
ecdc0628 | 166 | char * /* O - Host name */ |
167 | httpAddrLookup( | |
168 | const http_addr_t *addr, /* I - Address to lookup */ | |
169 | char *name, /* I - Host name buffer */ | |
170 | int namelen) /* I - Size of name buffer */ | |
ef416fc2 | 171 | { |
172 | DEBUG_printf(("httpAddrLookup(addr=%p, name=%p, namelen=%d)\n", | |
173 | addr, name, namelen)); | |
174 | ||
175 | /* | |
176 | * Range check input... | |
177 | */ | |
178 | ||
179 | if (!addr || !name || namelen <= 2) | |
180 | { | |
181 | if (name && namelen >= 1) | |
182 | *name = '\0'; | |
183 | ||
184 | return (NULL); | |
185 | } | |
186 | ||
187 | #ifdef AF_LOCAL | |
188 | if (addr->addr.sa_family == AF_LOCAL) | |
189 | strlcpy(name, addr->un.sun_path, namelen); | |
190 | else | |
191 | #endif /* AF_LOCAL */ | |
192 | #ifdef HAVE_GETNAMEINFO | |
193 | { | |
ef416fc2 | 194 | if (getnameinfo(&addr->addr, httpAddrLength(addr), name, namelen, |
b423cd4c | 195 | NULL, 0, 0)) |
ef416fc2 | 196 | { |
197 | /* | |
198 | * If we get an error back, then the address type is not supported | |
199 | * and we should zero out the buffer... | |
200 | */ | |
201 | ||
202 | name[0] = '\0'; | |
203 | ||
204 | return (NULL); | |
205 | } | |
206 | } | |
207 | #else | |
208 | { | |
209 | struct hostent *host; /* Host from name service */ | |
210 | ||
211 | ||
212 | # ifdef AF_INET6 | |
213 | if (addr->addr.sa_family == AF_INET6) | |
214 | host = gethostbyaddr(ADDR_CAST &(addr->ipv6.sin6_addr), | |
215 | sizeof(struct in_addr), AF_INET6); | |
216 | else | |
217 | # endif /* AF_INET6 */ | |
218 | host = gethostbyaddr(ADDR_CAST &(addr->ipv4.sin_addr), | |
219 | sizeof(struct in_addr), AF_INET); | |
220 | ||
221 | if (host == NULL) | |
222 | { | |
223 | /* | |
224 | * No hostname, so return the raw address... | |
225 | */ | |
226 | ||
227 | httpAddrString(addr, name, namelen); | |
228 | return (NULL); | |
229 | } | |
230 | ||
231 | strlcpy(name, host->h_name, namelen); | |
232 | } | |
233 | #endif /* HAVE_GETNAMEINFO */ | |
234 | ||
235 | return (name); | |
236 | } | |
237 | ||
238 | ||
239 | /* | |
ecdc0628 | 240 | * 'httpAddrString()' - Convert an address to a numeric string. |
ef416fc2 | 241 | * |
242 | * @since CUPS 1.2@ | |
243 | */ | |
244 | ||
ecdc0628 | 245 | char * /* O - Numeric address string */ |
246 | httpAddrString(const http_addr_t *addr, /* I - Address to convert */ | |
247 | char *s, /* I - String buffer */ | |
248 | int slen) /* I - Length of string */ | |
ef416fc2 | 249 | { |
250 | DEBUG_printf(("httpAddrString(addr=%p, s=%p, slen=%d)\n", | |
251 | addr, s, slen)); | |
252 | ||
253 | /* | |
254 | * Range check input... | |
255 | */ | |
256 | ||
257 | if (!addr || !s || slen <= 2) | |
258 | { | |
259 | if (s && slen >= 1) | |
260 | *s = '\0'; | |
261 | ||
262 | return (NULL); | |
263 | } | |
264 | ||
265 | #ifdef AF_LOCAL | |
266 | if (addr->addr.sa_family == AF_LOCAL) | |
267 | strlcpy(s, addr->un.sun_path, slen); | |
268 | else | |
269 | #endif /* AF_LOCAL */ | |
b423cd4c | 270 | if (addr->addr.sa_family == AF_INET) |
ef416fc2 | 271 | { |
b423cd4c | 272 | unsigned temp; /* Temporary address */ |
ef416fc2 | 273 | |
274 | ||
b423cd4c | 275 | temp = ntohl(addr->ipv4.sin_addr.s_addr); |
276 | ||
277 | snprintf(s, slen, "%d.%d.%d.%d", (temp >> 24) & 255, | |
278 | (temp >> 16) & 255, (temp >> 8) & 255, temp & 255); | |
279 | } | |
280 | #ifdef AF_INET6 | |
281 | else if (addr->addr.sa_family == AF_INET6) | |
282 | { | |
283 | # ifdef HAVE_GETNAMEINFO | |
ef416fc2 | 284 | if (getnameinfo(&addr->addr, httpAddrLength(addr), s, slen, |
b423cd4c | 285 | NULL, 0, NI_NUMERICHOST)) |
ef416fc2 | 286 | { |
287 | /* | |
288 | * If we get an error back, then the address type is not supported | |
289 | * and we should zero out the buffer... | |
290 | */ | |
291 | ||
292 | s[0] = '\0'; | |
293 | ||
294 | return (NULL); | |
295 | } | |
b423cd4c | 296 | # else |
297 | char *sptr; /* Pointer into string */ | |
298 | int i; /* Looping var */ | |
299 | unsigned temp; /* Current value */ | |
300 | const char *prefix; /* Prefix for address */ | |
301 | ||
302 | ||
303 | prefix = ""; | |
304 | for (sptr = s, i = 0; i < 4 && addr->ipv6.sin6_addr.s6_addr32[i]; i ++) | |
ef416fc2 | 305 | { |
b423cd4c | 306 | temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]); |
ef416fc2 | 307 | |
b423cd4c | 308 | snprintf(sptr, slen, "%s%x", prefix, (temp >> 16) & 0xffff); |
309 | prefix = ":"; | |
310 | slen -= strlen(sptr); | |
311 | sptr += strlen(sptr); | |
ef416fc2 | 312 | |
b423cd4c | 313 | temp &= 0xffff; |
ef416fc2 | 314 | |
b423cd4c | 315 | if (temp || i == 3 || addr->ipv6.sin6_addr.s6_addr32[i + 1]) |
316 | { | |
317 | snprintf(sptr, slen, "%s%x", prefix, temp); | |
ef416fc2 | 318 | slen -= strlen(sptr); |
319 | sptr += strlen(sptr); | |
ef416fc2 | 320 | } |
b423cd4c | 321 | } |
322 | ||
323 | if (i < 4) | |
324 | { | |
325 | while (i < 4 && !addr->ipv6.sin6_addr.s6_addr32[i]) | |
326 | i ++; | |
ef416fc2 | 327 | |
328 | if (i < 4) | |
329 | { | |
b423cd4c | 330 | snprintf(sptr, slen, "%s:", prefix); |
331 | prefix = ":"; | |
332 | slen -= strlen(sptr); | |
333 | sptr += strlen(sptr); | |
ef416fc2 | 334 | |
b423cd4c | 335 | for (; i < 4; i ++) |
ef416fc2 | 336 | { |
b423cd4c | 337 | temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]); |
ef416fc2 | 338 | |
b423cd4c | 339 | if ((temp & 0xffff0000) || addr->ipv6.sin6_addr.s6_addr32[i - 1]) |
ef416fc2 | 340 | { |
b423cd4c | 341 | snprintf(sptr, slen, "%s%x", prefix, (temp >> 16) & 0xffff); |
ef416fc2 | 342 | slen -= strlen(sptr); |
343 | sptr += strlen(sptr); | |
b423cd4c | 344 | } |
ef416fc2 | 345 | |
b423cd4c | 346 | snprintf(sptr, slen, "%s%x", prefix, temp & 0xffff); |
347 | slen -= strlen(sptr); | |
348 | sptr += strlen(sptr); | |
ef416fc2 | 349 | } |
350 | } | |
b423cd4c | 351 | else if (sptr == s) |
352 | { | |
353 | /* | |
354 | * Empty address... | |
355 | */ | |
ef416fc2 | 356 | |
b423cd4c | 357 | strlcpy(s, "::", slen); |
358 | sptr = s + 2; | |
359 | slen -= 2; | |
360 | } | |
361 | else | |
362 | { | |
363 | /* | |
364 | * Empty at end... | |
365 | */ | |
ef416fc2 | 366 | |
b423cd4c | 367 | strlcpy(sptr, "::", slen); |
368 | sptr += 2; | |
369 | slen -= 2; | |
370 | } | |
ef416fc2 | 371 | } |
b423cd4c | 372 | # endif /* HAVE_GETNAMEINFO */ |
ef416fc2 | 373 | } |
b423cd4c | 374 | #endif /* AF_INET6 */ |
375 | else | |
376 | strlcpy(s, "UNKNOWN", slen); | |
ef416fc2 | 377 | |
378 | DEBUG_printf(("httpAddrString: returning \"%s\"...\n", s)); | |
379 | ||
380 | return (s); | |
381 | } | |
382 | ||
383 | ||
384 | /* | |
385 | * 'httpGetHostByName()' - Lookup a hostname or IPv4 address, and return | |
386 | * address records for the specified name. | |
387 | * | |
388 | * @deprecated@ | |
389 | */ | |
390 | ||
391 | struct hostent * /* O - Host entry */ | |
392 | httpGetHostByName(const char *name) /* I - Hostname or IP address */ | |
393 | { | |
394 | const char *nameptr; /* Pointer into name */ | |
395 | unsigned ip[4]; /* IP address components */ | |
396 | _cups_globals_t *cg = _cupsGlobals(); | |
397 | /* Pointer to library globals */ | |
398 | ||
399 | ||
400 | DEBUG_printf(("httpGetHostByName(name=\"%s\")\n", name)); | |
401 | ||
402 | /* | |
403 | * Avoid lookup delays and configuration problems when connecting | |
404 | * to the localhost address... | |
405 | */ | |
406 | ||
407 | if (!strcmp(name, "localhost")) | |
408 | name = "127.0.0.1"; | |
409 | ||
410 | /* | |
411 | * This function is needed because some operating systems have a | |
412 | * buggy implementation of gethostbyname() that does not support | |
413 | * IP addresses. If the first character of the name string is a | |
414 | * number, then sscanf() is used to extract the IP components. | |
415 | * We then pack the components into an IPv4 address manually, | |
416 | * since the inet_aton() function is deprecated. We use the | |
417 | * htonl() macro to get the right byte order for the address. | |
418 | * | |
419 | * We also support domain sockets when supported by the underlying | |
420 | * OS... | |
421 | */ | |
422 | ||
423 | #ifdef AF_LOCAL | |
424 | if (name[0] == '/') | |
425 | { | |
426 | /* | |
427 | * A domain socket address, so make an AF_LOCAL entry and return it... | |
428 | */ | |
429 | ||
430 | cg->hostent.h_name = (char *)name; | |
431 | cg->hostent.h_aliases = NULL; | |
432 | cg->hostent.h_addrtype = AF_LOCAL; | |
433 | cg->hostent.h_length = strlen(name) + 1; | |
434 | cg->hostent.h_addr_list = cg->ip_ptrs; | |
435 | cg->ip_ptrs[0] = (char *)name; | |
436 | cg->ip_ptrs[1] = NULL; | |
437 | ||
438 | DEBUG_puts("httpGetHostByName: returning domain socket address..."); | |
439 | ||
440 | return (&cg->hostent); | |
441 | } | |
442 | #endif /* AF_LOCAL */ | |
443 | ||
444 | for (nameptr = name; isdigit(*nameptr & 255) || *nameptr == '.'; nameptr ++); | |
445 | ||
446 | if (!*nameptr) | |
447 | { | |
448 | /* | |
449 | * We have an IPv4 address; break it up and provide the host entry | |
450 | * to the caller. | |
451 | */ | |
452 | ||
453 | if (sscanf(name, "%u.%u.%u.%u", ip, ip + 1, ip + 2, ip + 3) != 4) | |
454 | return (NULL); /* Must have 4 numbers */ | |
455 | ||
456 | if (ip[0] > 255 || ip[1] > 255 || ip[2] > 255 || ip[3] > 255) | |
457 | return (NULL); /* Invalid byte ranges! */ | |
458 | ||
459 | cg->ip_addr = htonl(((((((ip[0] << 8) | ip[1]) << 8) | ip[2]) << 8) | | |
460 | ip[3])); | |
461 | ||
462 | /* | |
463 | * Fill in the host entry and return it... | |
464 | */ | |
465 | ||
466 | cg->hostent.h_name = (char *)name; | |
467 | cg->hostent.h_aliases = NULL; | |
468 | cg->hostent.h_addrtype = AF_INET; | |
469 | cg->hostent.h_length = 4; | |
470 | cg->hostent.h_addr_list = cg->ip_ptrs; | |
471 | cg->ip_ptrs[0] = (char *)&(cg->ip_addr); | |
472 | cg->ip_ptrs[1] = NULL; | |
473 | ||
474 | DEBUG_puts("httpGetHostByName: returning IPv4 address..."); | |
475 | ||
476 | return (&cg->hostent); | |
477 | } | |
478 | else | |
479 | { | |
480 | /* | |
481 | * Use the gethostbyname() function to get the IPv4 address for | |
482 | * the name... | |
483 | */ | |
484 | ||
485 | DEBUG_puts("httpGetHostByName: returning domain lookup address(es)..."); | |
486 | ||
487 | return (gethostbyname(name)); | |
488 | } | |
489 | } | |
490 | ||
491 | ||
492 | /* | |
757d2cad | 493 | * 'httpGetHostname()' - Get the FQDN for the connection or local system. |
ef416fc2 | 494 | * |
757d2cad | 495 | * When "http" points to a connected socket, return the hostname or |
496 | * address that was used in the call to httpConnect() or httpConnectEncrypt(). | |
497 | * Otherwise, return the FQDN for the local system using both gethostname() | |
498 | * and gethostbyname() to get the local hostname with domain. | |
ef416fc2 | 499 | * |
500 | * @since CUPS 1.2@ | |
501 | */ | |
502 | ||
757d2cad | 503 | const char * /* O - FQDN for connection or system */ |
504 | httpGetHostname(http_t *http, /* I - HTTP connection or NULL */ | |
505 | char *s, /* I - String buffer for name */ | |
506 | int slen) /* I - Size of buffer */ | |
ef416fc2 | 507 | { |
508 | struct hostent *host; /* Host entry to get FQDN */ | |
509 | ||
510 | ||
757d2cad | 511 | if (http) |
480ef0fe | 512 | { |
513 | if (http->hostname[0] == '/') | |
514 | strlcpy(s, "localhost", slen); | |
515 | else | |
516 | strlcpy(s, http->hostname, slen); | |
517 | } | |
757d2cad | 518 | else |
ef416fc2 | 519 | { |
520 | /* | |
757d2cad | 521 | * Get the hostname... |
ef416fc2 | 522 | */ |
523 | ||
757d2cad | 524 | gethostname(s, slen); |
525 | ||
526 | if (!strchr(s, '.')) | |
527 | { | |
528 | /* | |
529 | * The hostname is not a FQDN, so look it up... | |
530 | */ | |
531 | ||
532 | if ((host = gethostbyname(s)) != NULL) | |
533 | strlcpy(s, host->h_name, slen); | |
534 | } | |
ef416fc2 | 535 | } |
536 | ||
537 | /* | |
538 | * Return the hostname with as much domain info as we have... | |
539 | */ | |
540 | ||
541 | return (s); | |
542 | } | |
543 | ||
544 | ||
545 | /* | |
480ef0fe | 546 | * End of "$Id: http-addr.c 5251 2006-03-08 18:34:07Z mike $". |
ef416fc2 | 547 | */ |