1 /*
2 * PPD utilities for CUPS.
3 *
4 * Copyright © 2007-2018 by Apple Inc.
5 * Copyright © 1997-2006 by Easy Software Products.
6 *
7 * These coded instructions, statements, and computer programs are the
8 * property of Apple Inc. and are protected by Federal copyright
9 * law. Distribution and use rights are outlined in the file "LICENSE.txt"
10 * which should have been included with this file. If this file is
11 * missing or damaged, see the license at "http://www.cups.org/".
12 *
13 * This file is subject to the Apple OS-Developed Software exception.
14 */
15
16 /*
17 * Include necessary headers...
18 */
19
20 #include "cups-private.h"
21 #include "ppd-private.h"
22 #include <fcntl.h>
23 #include <sys/stat.h>
24 #if defined(_WIN32) || defined(__EMX__)
25 # include <io.h>
26 #else
27 # include <unistd.h>
28 #endif /* _WIN32 || __EMX__ */
29
30
31 /*
32 * Local functions...
33 */
34
35 static int cups_get_printer_uri(http_t *http, const char *name,
36 char *host, int hostsize, int *port,
37 char *resource, int resourcesize,
38 int depth);
39
40
41 /*
42 * 'cupsGetPPD()' - Get the PPD file for a printer on the default server.
43 *
44 * For classes, @code cupsGetPPD@ returns the PPD file for the first printer
45 * in the class.
46 *
47 * The returned filename is stored in a static buffer and is overwritten with
48 * each call to @code cupsGetPPD@ or @link cupsGetPPD2@. The caller "owns" the
49 * file that is created and must @code unlink@ the returned filename.
50 */
51
52 const char * /* O - Filename for PPD file */
cupsGetPPD(const char * name)53 cupsGetPPD(const char *name) /* I - Destination name */
54 {
55 _ppd_globals_t *pg = _ppdGlobals(); /* Pointer to library globals */
56 time_t modtime = 0; /* Modification time */
57
58
59 /*
60 * Return the PPD file...
61 */
62
63 pg->ppd_filename[0] = '\0';
64
65 if (cupsGetPPD3(CUPS_HTTP_DEFAULT, name, &modtime, pg->ppd_filename,
66 sizeof(pg->ppd_filename)) == HTTP_STATUS_OK)
67 return (pg->ppd_filename);
68 else
69 return (NULL);
70 }
71
72
73 /*
74 * 'cupsGetPPD2()' - Get the PPD file for a printer from the specified server.
75 *
76 * For classes, @code cupsGetPPD2@ returns the PPD file for the first printer
77 * in the class.
78 *
79 * The returned filename is stored in a static buffer and is overwritten with
80 * each call to @link cupsGetPPD@ or @code cupsGetPPD2@. The caller "owns" the
81 * file that is created and must @code unlink@ the returned filename.
82 *
83 * @since CUPS 1.1.21/macOS 10.4@
84 */
85
86 const char * /* O - Filename for PPD file */
cupsGetPPD2(http_t * http,const char * name)87 cupsGetPPD2(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
88 const char *name) /* I - Destination name */
89 {
90 _ppd_globals_t *pg = _ppdGlobals(); /* Pointer to library globals */
91 time_t modtime = 0; /* Modification time */
92
93
94 pg->ppd_filename[0] = '\0';
95
96 if (cupsGetPPD3(http, name, &modtime, pg->ppd_filename,
97 sizeof(pg->ppd_filename)) == HTTP_STATUS_OK)
98 return (pg->ppd_filename);
99 else
100 return (NULL);
101 }
102
103
104 /*
105 * 'cupsGetPPD3()' - Get the PPD file for a printer on the specified
106 * server if it has changed.
107 *
108 * The "modtime" parameter contains the modification time of any
109 * locally-cached content and is updated with the time from the PPD file on
110 * the server.
111 *
112 * The "buffer" parameter contains the local PPD filename. If it contains
113 * the empty string, a new temporary file is created, otherwise the existing
114 * file will be overwritten as needed. The caller "owns" the file that is
115 * created and must @code unlink@ the returned filename.
116 *
117 * On success, @code HTTP_STATUS_OK@ is returned for a new PPD file and
118 * @code HTTP_STATUS_NOT_MODIFIED@ if the existing PPD file is up-to-date. Any other
119 * status is an error.
120 *
121 * For classes, @code cupsGetPPD3@ returns the PPD file for the first printer
122 * in the class.
123 *
124 * @since CUPS 1.4/macOS 10.6@
125 */
126
127 http_status_t /* O - HTTP status */
cupsGetPPD3(http_t * http,const char * name,time_t * modtime,char * buffer,size_t bufsize)128 cupsGetPPD3(http_t *http, /* I - HTTP connection or @code CUPS_HTTP_DEFAULT@ */
129 const char *name, /* I - Destination name */
130 time_t *modtime, /* IO - Modification time */
131 char *buffer, /* I - Filename buffer */
132 size_t bufsize) /* I - Size of filename buffer */
133 {
134 int http_port; /* Port number */
135 char http_hostname[HTTP_MAX_HOST];
136 /* Hostname associated with connection */
137 http_t *http2; /* Alternate HTTP connection */
138 int fd; /* PPD file */
139 char localhost[HTTP_MAX_URI],/* Local hostname */
140 hostname[HTTP_MAX_URI], /* Hostname */
141 resource[HTTP_MAX_URI]; /* Resource name */
142 int port; /* Port number */
143 http_status_t status; /* HTTP status from server */
144 char tempfile[1024] = ""; /* Temporary filename */
145 _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */
146
147
148 /*
149 * Range check input...
150 */
151
152 DEBUG_printf(("cupsGetPPD3(http=%p, name=\"%s\", modtime=%p(%d), buffer=%p, "
153 "bufsize=%d)", http, name, modtime,
154 modtime ? (int)*modtime : 0, buffer, (int)bufsize));
155
156 if (!name)
157 {
158 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No printer name"), 1);
159 return (HTTP_STATUS_NOT_ACCEPTABLE);
160 }
161
162 if (!modtime)
163 {
164 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No modification time"), 1);
165 return (HTTP_STATUS_NOT_ACCEPTABLE);
166 }
167
168 if (!buffer || bufsize <= 1)
169 {
170 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Bad filename buffer"), 1);
171 return (HTTP_STATUS_NOT_ACCEPTABLE);
172 }
173
174 #ifndef _WIN32
175 /*
176 * See if the PPD file is available locally...
177 */
178
179 if (http)
180 httpGetHostname(http, hostname, sizeof(hostname));
181 else
182 {
183 strlcpy(hostname, cupsServer(), sizeof(hostname));
184 if (hostname[0] == '/')
185 strlcpy(hostname, "localhost", sizeof(hostname));
186 }
187
188 if (!_cups_strcasecmp(hostname, "localhost"))
189 {
190 char ppdname[1024]; /* PPD filename */
191 struct stat ppdinfo; /* PPD file information */
192
193
194 snprintf(ppdname, sizeof(ppdname), "%s/ppd/%s.ppd", cg->cups_serverroot,
195 name);
196 if (!stat(ppdname, &ppdinfo) && !access(ppdname, R_OK))
197 {
198 /*
199 * OK, the file exists and is readable, use it!
200 */
201
202 if (buffer[0])
203 {
204 unlink(buffer);
205
206 if (symlink(ppdname, buffer) && errno != EEXIST)
207 {
208 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, NULL, 0);
209
210 return (HTTP_STATUS_SERVER_ERROR);
211 }
212 }
213 else
214 {
215 int tries; /* Number of tries */
216 const char *tmpdir; /* TMPDIR environment variable */
217 struct timeval curtime; /* Current time */
218
219 #ifdef __APPLE__
220 /*
221 * On macOS and iOS, the TMPDIR environment variable is not always the
222 * best location to place temporary files due to sandboxing. Instead,
223 * the confstr function should be called to get the proper per-user,
224 * per-process TMPDIR value.
225 */
226
227 char tmppath[1024]; /* Temporary directory */
228
229 if ((tmpdir = getenv("TMPDIR")) != NULL && access(tmpdir, W_OK))
230 tmpdir = NULL;
231
232 if (!tmpdir)
233 {
234 if (confstr(_CS_DARWIN_USER_TEMP_DIR, tmppath, sizeof(tmppath)))
235 tmpdir = tmppath;
236 else
237 tmpdir = "/private/tmp"; /* This should never happen */
238 }
239 #else
240 /*
241 * Previously we put root temporary files in the default CUPS temporary
242 * directory under /var/spool/cups. However, since the scheduler cleans
243 * out temporary files there and runs independently of the user apps, we
244 * don't want to use it unless specifically told to by cupsd.
245 */
246
247 if ((tmpdir = getenv("TMPDIR")) == NULL)
248 tmpdir = "/tmp";
249 #endif /* __APPLE__ */
250
251 /*
252 * Make the temporary name using the specified directory...
253 */
254
255 tries = 0;
256
257 do
258 {
259 /*
260 * Get the current time of day...
261 */
262
263 gettimeofday(&curtime, NULL);
264
265 /*
266 * Format a string using the hex time values...
267 */
268
269 snprintf(buffer, bufsize, "%s/%08lx%05lx", tmpdir,
270 (unsigned long)curtime.tv_sec,
271 (unsigned long)curtime.tv_usec);
272
273 /*
274 * Try to make a symlink...
275 */
276
277 if (!symlink(ppdname, buffer))
278 break;
279
280 tries ++;
281 }
282 while (tries < 1000);
283
284 if (tries >= 1000)
285 {
286 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, NULL, 0);
287
288 return (HTTP_STATUS_SERVER_ERROR);
289 }
290 }
291
292 if (*modtime >= ppdinfo.st_mtime)
293 return (HTTP_STATUS_NOT_MODIFIED);
294 else
295 {
296 *modtime = ppdinfo.st_mtime;
297 return (HTTP_STATUS_OK);
298 }
299 }
300 }
301 #endif /* !_WIN32 */
302
303 /*
304 * Try finding a printer URI for this printer...
305 */
306
307 if (!http)
308 if ((http = _cupsConnect()) == NULL)
309 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
310
311 if (!cups_get_printer_uri(http, name, hostname, sizeof(hostname), &port,
312 resource, sizeof(resource), 0))
313 return (HTTP_STATUS_NOT_FOUND);
314
315 DEBUG_printf(("2cupsGetPPD3: Printer hostname=\"%s\", port=%d", hostname,
316 port));
317
318 if (cupsServer()[0] == '/' && !_cups_strcasecmp(hostname, "localhost") && port == ippPort())
319 {
320 /*
321 * Redirect localhost to domain socket...
322 */
323
324 strlcpy(hostname, cupsServer(), sizeof(hostname));
325 port = 0;
326
327 DEBUG_printf(("2cupsGetPPD3: Redirecting to \"%s\".", hostname));
328 }
329
330 /*
331 * Remap local hostname to localhost...
332 */
333
334 httpGetHostname(NULL, localhost, sizeof(localhost));
335
336 DEBUG_printf(("2cupsGetPPD3: Local hostname=\"%s\"", localhost));
337
338 if (!_cups_strcasecmp(localhost, hostname))
339 strlcpy(hostname, "localhost", sizeof(hostname));
340
341 /*
342 * Get the hostname and port number we are connected to...
343 */
344
345 httpGetHostname(http, http_hostname, sizeof(http_hostname));
346 http_port = httpAddrPort(http->hostaddr);
347
348 DEBUG_printf(("2cupsGetPPD3: Connection hostname=\"%s\", port=%d",
349 http_hostname, http_port));
350
351 /*
352 * Reconnect to the correct server as needed...
353 */
354
355 if (!_cups_strcasecmp(http_hostname, hostname) && port == http_port)
356 http2 = http;
357 else if ((http2 = httpConnect2(hostname, port, NULL, AF_UNSPEC,
358 cupsEncryption(), 1, 30000, NULL)) == NULL)
359 {
360 DEBUG_puts("1cupsGetPPD3: Unable to connect to server");
361
362 return (HTTP_STATUS_SERVICE_UNAVAILABLE);
363 }
364
365 /*
366 * Get a temp file...
367 */
368
369 if (buffer[0])
370 fd = open(buffer, O_CREAT | O_TRUNC | O_WRONLY, 0600);
371 else
372 fd = cupsTempFd(tempfile, sizeof(tempfile));
373
374 if (fd < 0)
375 {
376 /*
377 * Can't open file; close the server connection and return NULL...
378 */
379
380 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, NULL, 0);
381
382 if (http2 != http)
383 httpClose(http2);
384
385 return (HTTP_STATUS_SERVER_ERROR);
386 }
387
388 /*
389 * And send a request to the HTTP server...
390 */
391
392 strlcat(resource, ".ppd", sizeof(resource));
393
394 if (*modtime > 0)
395 httpSetField(http2, HTTP_FIELD_IF_MODIFIED_SINCE,
396 httpGetDateString(*modtime));
397
398 status = cupsGetFd(http2, resource, fd);
399
400 close(fd);
401
402 /*
403 * See if we actually got the file or an error...
404 */
405
406 if (status == HTTP_STATUS_OK)
407 {
408 *modtime = httpGetDateTime(httpGetField(http2, HTTP_FIELD_DATE));
409
410 if (tempfile[0])
411 strlcpy(buffer, tempfile, bufsize);
412 }
413 else if (status != HTTP_STATUS_NOT_MODIFIED)
414 {
415 _cupsSetHTTPError(status);
416
417 if (buffer[0])
418 unlink(buffer);
419 else if (tempfile[0])
420 unlink(tempfile);
421 }
422 else if (tempfile[0])
423 unlink(tempfile);
424
425 if (http2 != http)
426 httpClose(http2);
427
428 /*
429 * Return the PPD file...
430 */
431
432 DEBUG_printf(("1cupsGetPPD3: Returning status %d", status));
433
434 return (status);
435 }
436
437
438 /*
439 * 'cupsGetServerPPD()' - Get an available PPD file from the server.
440 *
441 * This function returns the named PPD file from the server. The
442 * list of available PPDs is provided by the IPP @code CUPS_GET_PPDS@
443 * operation.
444 *
445 * You must remove (unlink) the PPD file when you are finished with
446 * it. The PPD filename is stored in a static location that will be
447 * overwritten on the next call to @link cupsGetPPD@, @link cupsGetPPD2@,
448 * or @link cupsGetServerPPD@.
449 *
450 * @since CUPS 1.3/macOS 10.5@
451 */
452
453 char * /* O - Name of PPD file or @code NULL@ on error */
cupsGetServerPPD(http_t * http,const char * name)454 cupsGetServerPPD(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
455 const char *name) /* I - Name of PPD file ("ppd-name") */
456 {
457 int fd; /* PPD file descriptor */
458 ipp_t *request; /* IPP request */
459 _ppd_globals_t *pg = _ppdGlobals();
460 /* Pointer to library globals */
461
462
463 /*
464 * Range check input...
465 */
466
467 if (!name)
468 {
469 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No PPD name"), 1);
470
471 return (NULL);
472 }
473
474 if (!http)
475 if ((http = _cupsConnect()) == NULL)
476 return (NULL);
477
478 /*
479 * Get a temp file...
480 */
481
482 if ((fd = cupsTempFd(pg->ppd_filename, sizeof(pg->ppd_filename))) < 0)
483 {
484 /*
485 * Can't open file; close the server connection and return NULL...
486 */
487
488 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, NULL, 0);
489
490 return (NULL);
491 }
492
493 /*
494 * Get the PPD file...
495 */
496
497 request = ippNewRequest(IPP_OP_CUPS_GET_PPD);
498 ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME, "ppd-name", NULL,
499 name);
500
501 ippDelete(cupsDoIORequest(http, request, "/", -1, fd));
502
503 close(fd);
504
505 if (cupsLastError() != IPP_STATUS_OK)
506 {
507 unlink(pg->ppd_filename);
508 return (NULL);
509 }
510 else
511 return (pg->ppd_filename);
512 }
513
514
515 /*
516 * 'cups_get_printer_uri()' - Get the printer-uri-supported attribute for the
517 * first printer in a class.
518 */
519
520 static int /* O - 1 on success, 0 on failure */
cups_get_printer_uri(http_t * http,const char * name,char * host,int hostsize,int * port,char * resource,int resourcesize,int depth)521 cups_get_printer_uri(
522 http_t *http, /* I - Connection to server */
523 const char *name, /* I - Name of printer or class */
524 char *host, /* I - Hostname buffer */
525 int hostsize, /* I - Size of hostname buffer */
526 int *port, /* O - Port number */
527 char *resource, /* I - Resource buffer */
528 int resourcesize, /* I - Size of resource buffer */
529 int depth) /* I - Depth of query */
530 {
531 int i; /* Looping var */
532 ipp_t *request, /* IPP request */
533 *response; /* IPP response */
534 ipp_attribute_t *attr; /* Current attribute */
535 char uri[HTTP_MAX_URI], /* printer-uri attribute */
536 scheme[HTTP_MAX_URI], /* Scheme name */
537 username[HTTP_MAX_URI]; /* Username:password */
538 static const char * const requested_attrs[] =
539 { /* Requested attributes */
540 "member-uris",
541 "printer-uri-supported"
542 };
543
544
545 DEBUG_printf(("4cups_get_printer_uri(http=%p, name=\"%s\", host=%p, hostsize=%d, resource=%p, resourcesize=%d, depth=%d)", http, name, host, hostsize, resource, resourcesize, depth));
546
547 /*
548 * Setup the printer URI...
549 */
550
551 if (httpAssembleURIf(HTTP_URI_CODING_ALL, uri, sizeof(uri), "ipp", NULL, "localhost", 0, "/printers/%s", name) < HTTP_URI_STATUS_OK)
552 {
553 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unable to create printer-uri"), 1);
554
555 *host = '\0';
556 *resource = '\0';
557
558 return (0);
559 }
560
561 DEBUG_printf(("5cups_get_printer_uri: printer-uri=\"%s\"", uri));
562
563 /*
564 * Build an IPP_GET_PRINTER_ATTRIBUTES request, which requires the following
565 * attributes:
566 *
567 * attributes-charset
568 * attributes-natural-language
569 * printer-uri
570 * requested-attributes
571 */
572
573 request = ippNewRequest(IPP_OP_GET_PRINTER_ATTRIBUTES);
574
575 ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri", NULL, uri);
576
577 ippAddStrings(request, IPP_TAG_OPERATION, IPP_TAG_KEYWORD, "requested-attributes", sizeof(requested_attrs) / sizeof(requested_attrs[0]), NULL, requested_attrs);
578
579 /*
580 * Do the request and get back a response...
581 */
582
583 snprintf(resource, (size_t)resourcesize, "/printers/%s", name);
584
585 if ((response = cupsDoRequest(http, request, resource)) != NULL)
586 {
587 if ((attr = ippFindAttribute(response, "member-uris", IPP_TAG_URI)) != NULL)
588 {
589 /*
590 * Get the first actual printer name in the class...
591 */
592
593 DEBUG_printf(("5cups_get_printer_uri: Got member-uris with %d values.", ippGetCount(attr)));
594
595 for (i = 0; i < attr->num_values; i ++)
596 {
597 DEBUG_printf(("5cups_get_printer_uri: member-uris[%d]=\"%s\"", i, ippGetString(attr, i, NULL)));
598
599 httpSeparateURI(HTTP_URI_CODING_ALL, attr->values[i].string.text, scheme, sizeof(scheme), username, sizeof(username), host, hostsize, port, resource, resourcesize);
600 if (!strncmp(resource, "/printers/", 10))
601 {
602 /*
603 * Found a printer!
604 */
605
606 ippDelete(response);
607
608 DEBUG_printf(("5cups_get_printer_uri: Found printer member with host=\"%s\", port=%d, resource=\"%s\"", host, *port, resource));
609 return (1);
610 }
611 }
612 }
613 else if ((attr = ippFindAttribute(response, "printer-uri-supported", IPP_TAG_URI)) != NULL)
614 {
615 httpSeparateURI(HTTP_URI_CODING_ALL, _httpResolveURI(attr->values[0].string.text, uri, sizeof(uri), _HTTP_RESOLVE_DEFAULT, NULL, NULL), scheme, sizeof(scheme), username, sizeof(username), host, hostsize, port, resource, resourcesize);
616 ippDelete(response);
617
618 DEBUG_printf(("5cups_get_printer_uri: Resolved to host=\"%s\", port=%d, resource=\"%s\"", host, *port, resource));
619
620 if (!strncmp(resource, "/classes/", 9))
621 {
622 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No printer-uri found for class"), 1);
623
624 *host = '\0';
625 *resource = '\0';
626
627 DEBUG_puts("5cups_get_printer_uri: Not returning class.");
628 return (0);
629 }
630
631 return (1);
632 }
633
634 ippDelete(response);
635 }
636
637 if (cupsLastError() != IPP_STATUS_ERROR_NOT_FOUND)
638 _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No printer-uri found"), 1);
639
640 *host = '\0';
641 *resource = '\0';
642
643 DEBUG_puts("5cups_get_printer_uri: Printer URI not found.");
644 return (0);
645 }
646