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Commit | Line | Data |
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7a14d768 MS |
1 | /* |
2 | * "$Id$" | |
3 | * | |
0268488e | 4 | * DNS-SD discovery backend for CUPS. |
7a14d768 | 5 | * |
0268488e | 6 | * Copyright 2008-2011 by Apple Inc. |
7a14d768 MS |
7 | * |
8 | * These coded instructions, statements, and computer programs are the | |
9 | * property of Apple Inc. and are protected by Federal copyright | |
10 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
11 | * "LICENSE" which should have been included with this file. If this | |
12 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
13 | * | |
14 | * This file is subject to the Apple OS-Developed Software exception. | |
15 | * | |
16 | * Contents: | |
17 | * | |
18 | * main() - Browse for printers. | |
19 | * browse_callback() - Browse devices. | |
20 | * browse_local_callback() - Browse local devices. | |
21 | * compare_devices() - Compare two devices. | |
1340db2d MS |
22 | * exec_backend() - Execute the backend that corresponds to the |
23 | * resolved service name. | |
7a14d768 MS |
24 | * get_device() - Create or update a device. |
25 | * query_callback() - Process query data. | |
38e73f87 | 26 | * sigterm_handler() - Handle termination signals... |
7a14d768 MS |
27 | * unquote() - Unquote a name string. |
28 | */ | |
29 | ||
30 | /* | |
31 | * Include necessary headers. | |
32 | */ | |
33 | ||
34 | #include "backend-private.h" | |
35 | #include <cups/array.h> | |
36 | #include <dns_sd.h> | |
37 | ||
38 | ||
39 | /* | |
40 | * Device structure... | |
41 | */ | |
42 | ||
43 | typedef enum | |
44 | { | |
45 | CUPS_DEVICE_PRINTER = 0, /* lpd://... */ | |
46 | CUPS_DEVICE_IPP, /* ipp://... */ | |
d4d03398 | 47 | CUPS_DEVICE_IPPS, /* ipps://... */ |
7a14d768 MS |
48 | CUPS_DEVICE_FAX_IPP, /* ipp://... */ |
49 | CUPS_DEVICE_PDL_DATASTREAM, /* socket://... */ | |
50 | CUPS_DEVICE_RIOUSBPRINT /* riousbprint://... */ | |
51 | } cups_devtype_t; | |
52 | ||
53 | ||
54 | typedef struct | |
55 | { | |
56 | DNSServiceRef ref; /* Service reference for resolve */ | |
57 | char *name, /* Service name */ | |
58 | *domain, /* Domain name */ | |
59 | *fullName, /* Full name */ | |
238c3832 MS |
60 | *make_and_model, /* Make and model from TXT record */ |
61 | *device_id; /* 1284 device ID from TXT record */ | |
7a14d768 | 62 | cups_devtype_t type; /* Device registration type */ |
1f0275e3 MS |
63 | int priority, /* Priority associated with type */ |
64 | cups_shared, /* CUPS shared printer? */ | |
7a14d768 MS |
65 | sent; /* Did we list the device? */ |
66 | } cups_device_t; | |
67 | ||
68 | ||
38e73f87 MS |
69 | /* |
70 | * Local globals... | |
71 | */ | |
72 | ||
73 | static int job_canceled = 0; | |
74 | /* Set to 1 on SIGTERM */ | |
75 | ||
76 | ||
7a14d768 MS |
77 | /* |
78 | * Local functions... | |
79 | */ | |
80 | ||
81 | static void browse_callback(DNSServiceRef sdRef, | |
82 | DNSServiceFlags flags, | |
83 | uint32_t interfaceIndex, | |
84 | DNSServiceErrorType errorCode, | |
85 | const char *serviceName, | |
86 | const char *regtype, | |
87 | const char *replyDomain, void *context); | |
88 | static void browse_local_callback(DNSServiceRef sdRef, | |
89 | DNSServiceFlags flags, | |
90 | uint32_t interfaceIndex, | |
91 | DNSServiceErrorType errorCode, | |
92 | const char *serviceName, | |
93 | const char *regtype, | |
94 | const char *replyDomain, | |
95 | void *context); | |
96 | static int compare_devices(cups_device_t *a, cups_device_t *b); | |
97 | static void exec_backend(char **argv); | |
98 | static cups_device_t *get_device(cups_array_t *devices, | |
99 | const char *serviceName, | |
100 | const char *regtype, | |
101 | const char *replyDomain); | |
102 | static void query_callback(DNSServiceRef sdRef, | |
103 | DNSServiceFlags flags, | |
104 | uint32_t interfaceIndex, | |
105 | DNSServiceErrorType errorCode, | |
106 | const char *fullName, uint16_t rrtype, | |
107 | uint16_t rrclass, uint16_t rdlen, | |
108 | const void *rdata, uint32_t ttl, | |
109 | void *context); | |
38e73f87 | 110 | static void sigterm_handler(int sig); |
7a14d768 MS |
111 | static void unquote(char *dst, const char *src, size_t dstsize); |
112 | ||
113 | ||
114 | /* | |
115 | * 'main()' - Browse for printers. | |
116 | */ | |
117 | ||
118 | int /* O - Exit status */ | |
119 | main(int argc, /* I - Number of command-line args */ | |
120 | char *argv[]) /* I - Command-line arguments */ | |
121 | { | |
c5571a1d | 122 | const char *name; /* Backend name */ |
7a14d768 MS |
123 | DNSServiceRef main_ref, /* Main service reference */ |
124 | fax_ipp_ref, /* IPP fax service reference */ | |
125 | ipp_ref, /* IPP service reference */ | |
126 | ipp_tls_ref, /* IPP w/TLS service reference */ | |
d4d03398 | 127 | ipps_ref, /* IPP service reference */ |
7a14d768 MS |
128 | local_fax_ipp_ref, /* Local IPP fax service reference */ |
129 | local_ipp_ref, /* Local IPP service reference */ | |
130 | local_ipp_tls_ref, /* Local IPP w/TLS service reference */ | |
d4d03398 | 131 | local_ipps_ref, /* Local IPP service reference */ |
7a14d768 MS |
132 | local_printer_ref, /* Local LPD service reference */ |
133 | pdl_datastream_ref, /* AppSocket service reference */ | |
134 | printer_ref, /* LPD service reference */ | |
135 | riousbprint_ref; /* Remote IO service reference */ | |
136 | int fd; /* Main file descriptor */ | |
137 | fd_set input; /* Input set for select() */ | |
138 | struct timeval timeout; /* Timeout for select() */ | |
139 | cups_array_t *devices; /* Device array */ | |
140 | cups_device_t *device; /* Current device */ | |
bf3816c7 | 141 | char uriName[1024]; /* Unquoted fullName for URI */ |
38e73f87 MS |
142 | #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET) |
143 | struct sigaction action; /* Actions for POSIX signals */ | |
144 | #endif /* HAVE_SIGACTION && !HAVE_SIGSET */ | |
7a14d768 MS |
145 | |
146 | ||
147 | /* | |
38e73f87 | 148 | * Don't buffer stderr, and catch SIGTERM... |
7a14d768 MS |
149 | */ |
150 | ||
151 | setbuf(stderr, NULL); | |
152 | ||
38e73f87 MS |
153 | #ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */ |
154 | sigset(SIGTERM, sigterm_handler); | |
155 | #elif defined(HAVE_SIGACTION) | |
156 | memset(&action, 0, sizeof(action)); | |
157 | ||
158 | sigemptyset(&action.sa_mask); | |
ee6ddad2 MS |
159 | action.sa_handler = sigterm_handler; |
160 | sigaction(SIGTERM, &action, NULL); | |
38e73f87 MS |
161 | #else |
162 | signal(SIGTERM, sigterm_handler); | |
163 | #endif /* HAVE_SIGSET */ | |
164 | ||
165 | /* | |
166 | * Check command-line... | |
167 | */ | |
168 | ||
7a14d768 MS |
169 | if (argc >= 6) |
170 | exec_backend(argv); | |
171 | else if (argc != 1) | |
172 | { | |
0837b7e8 MS |
173 | _cupsLangPrintf(stderr, |
174 | _("Usage: %s job-id user title copies options [file]"), | |
175 | argv[0]); | |
7a14d768 MS |
176 | return (1); |
177 | } | |
178 | ||
c5571a1d MS |
179 | /* |
180 | * Only do discovery when run as "dnssd"... | |
181 | */ | |
182 | ||
183 | if ((name = strrchr(argv[0], '/')) != NULL) | |
184 | name ++; | |
185 | else | |
186 | name = argv[0]; | |
187 | ||
188 | if (strcmp(name, "dnssd")) | |
189 | return (0); | |
190 | ||
7a14d768 MS |
191 | /* |
192 | * Create an array to track devices... | |
193 | */ | |
194 | ||
195 | devices = cupsArrayNew((cups_array_func_t)compare_devices, NULL); | |
196 | ||
197 | /* | |
198 | * Browse for different kinds of printers... | |
199 | */ | |
200 | ||
201 | if (DNSServiceCreateConnection(&main_ref) != kDNSServiceErr_NoError) | |
202 | { | |
203 | perror("ERROR: Unable to create service connection"); | |
204 | return (1); | |
205 | } | |
206 | ||
207 | fd = DNSServiceRefSockFD(main_ref); | |
208 | ||
209 | fax_ipp_ref = main_ref; | |
210 | DNSServiceBrowse(&fax_ipp_ref, kDNSServiceFlagsShareConnection, 0, | |
211 | "_fax-ipp._tcp", NULL, browse_callback, devices); | |
212 | ||
213 | ipp_ref = main_ref; | |
214 | DNSServiceBrowse(&ipp_ref, kDNSServiceFlagsShareConnection, 0, | |
215 | "_ipp._tcp", NULL, browse_callback, devices); | |
216 | ||
217 | ipp_tls_ref = main_ref; | |
218 | DNSServiceBrowse(&ipp_tls_ref, kDNSServiceFlagsShareConnection, 0, | |
219 | "_ipp-tls._tcp", NULL, browse_callback, devices); | |
220 | ||
d4d03398 | 221 | ipps_ref = main_ref; |
85dda01c | 222 | DNSServiceBrowse(&ipps_ref, kDNSServiceFlagsShareConnection, 0, |
d4d03398 MS |
223 | "_ipps._tcp", NULL, browse_callback, devices); |
224 | ||
7a14d768 MS |
225 | local_fax_ipp_ref = main_ref; |
226 | DNSServiceBrowse(&local_fax_ipp_ref, kDNSServiceFlagsShareConnection, | |
227 | kDNSServiceInterfaceIndexLocalOnly, | |
228 | "_fax-ipp._tcp", NULL, browse_local_callback, devices); | |
229 | ||
230 | local_ipp_ref = main_ref; | |
231 | DNSServiceBrowse(&local_ipp_ref, kDNSServiceFlagsShareConnection, | |
232 | kDNSServiceInterfaceIndexLocalOnly, | |
233 | "_ipp._tcp", NULL, browse_local_callback, devices); | |
234 | ||
235 | local_ipp_tls_ref = main_ref; | |
236 | DNSServiceBrowse(&local_ipp_tls_ref, kDNSServiceFlagsShareConnection, | |
237 | kDNSServiceInterfaceIndexLocalOnly, | |
238 | "_ipp-tls._tcp", NULL, browse_local_callback, devices); | |
239 | ||
d4d03398 | 240 | local_ipps_ref = main_ref; |
85dda01c | 241 | DNSServiceBrowse(&local_ipps_ref, kDNSServiceFlagsShareConnection, |
d4d03398 MS |
242 | kDNSServiceInterfaceIndexLocalOnly, |
243 | "_ipps._tcp", NULL, browse_local_callback, devices); | |
244 | ||
7a14d768 MS |
245 | local_printer_ref = main_ref; |
246 | DNSServiceBrowse(&local_printer_ref, kDNSServiceFlagsShareConnection, | |
247 | kDNSServiceInterfaceIndexLocalOnly, | |
248 | "_printer._tcp", NULL, browse_local_callback, devices); | |
249 | ||
88f9aafc | 250 | pdl_datastream_ref = main_ref; |
7a14d768 MS |
251 | DNSServiceBrowse(&pdl_datastream_ref, kDNSServiceFlagsShareConnection, 0, |
252 | "_pdl-datastream._tcp", NULL, browse_callback, devices); | |
253 | ||
254 | printer_ref = main_ref; | |
255 | DNSServiceBrowse(&printer_ref, kDNSServiceFlagsShareConnection, 0, | |
256 | "_printer._tcp", NULL, browse_callback, devices); | |
257 | ||
258 | riousbprint_ref = main_ref; | |
259 | DNSServiceBrowse(&riousbprint_ref, kDNSServiceFlagsShareConnection, 0, | |
260 | "_riousbprint._tcp", NULL, browse_callback, devices); | |
261 | ||
262 | /* | |
263 | * Loop until we are killed... | |
264 | */ | |
265 | ||
38e73f87 | 266 | while (!job_canceled) |
7a14d768 MS |
267 | { |
268 | FD_ZERO(&input); | |
269 | FD_SET(fd, &input); | |
270 | ||
d4d03398 MS |
271 | timeout.tv_sec = 0; |
272 | timeout.tv_usec = 250000; | |
7a14d768 MS |
273 | |
274 | if (select(fd + 1, &input, NULL, NULL, &timeout) < 0) | |
275 | continue; | |
276 | ||
277 | if (FD_ISSET(fd, &input)) | |
278 | { | |
279 | /* | |
280 | * Process results of our browsing... | |
281 | */ | |
282 | ||
283 | DNSServiceProcessResult(main_ref); | |
284 | } | |
285 | else | |
286 | { | |
287 | /* | |
288 | * Announce any devices we've found... | |
289 | */ | |
290 | ||
58dc1933 | 291 | DNSServiceErrorType status; /* DNS query status */ |
1f0275e3 | 292 | cups_device_t *best; /* Best matching device */ |
7a14d768 | 293 | char device_uri[1024]; /* Device URI */ |
5eb9da71 | 294 | int count; /* Number of queries */ |
d4d03398 | 295 | int sent; /* Number of sent */ |
7a14d768 | 296 | |
1f0275e3 | 297 | for (device = (cups_device_t *)cupsArrayFirst(devices), |
d4d03398 | 298 | best = NULL, count = 0, sent = 0; |
7a14d768 MS |
299 | device; |
300 | device = (cups_device_t *)cupsArrayNext(devices)) | |
d4d03398 MS |
301 | { |
302 | if (device->sent) | |
303 | sent ++; | |
304 | ||
305 | if (device->ref) | |
306 | count ++; | |
307 | ||
7a14d768 MS |
308 | if (!device->ref && !device->sent) |
309 | { | |
310 | /* | |
311 | * Found the device, now get the TXT record(s) for it... | |
312 | */ | |
313 | ||
d4d03398 | 314 | if (count < 20) |
5eb9da71 MS |
315 | { |
316 | device->ref = main_ref; | |
317 | ||
318 | fprintf(stderr, "DEBUG: Querying \"%s\"...\n", device->fullName); | |
319 | ||
58dc1933 MS |
320 | status = DNSServiceQueryRecord(&(device->ref), |
321 | kDNSServiceFlagsShareConnection, | |
322 | 0, device->fullName, | |
323 | kDNSServiceType_TXT, | |
324 | kDNSServiceClass_IN, query_callback, | |
325 | devices); | |
326 | if (status != kDNSServiceErr_NoError) | |
327 | { | |
5eb9da71 | 328 | fputs("ERROR: Unable to query for TXT records!\n", stderr); |
58dc1933 MS |
329 | fprintf(stderr, "DEBUG: DNSServiceQueryRecord returned %d\n", |
330 | status); | |
331 | } | |
332 | else | |
5eb9da71 MS |
333 | count ++; |
334 | } | |
7a14d768 MS |
335 | } |
336 | else if (!device->sent) | |
337 | { | |
338 | /* | |
339 | * Got the TXT records, now report the device... | |
340 | */ | |
341 | ||
342 | DNSServiceRefDeallocate(device->ref); | |
343 | device->ref = 0; | |
344 | ||
1f0275e3 MS |
345 | if (!best) |
346 | best = device; | |
88f9aafc MS |
347 | else if (_cups_strcasecmp(best->name, device->name) || |
348 | _cups_strcasecmp(best->domain, device->domain)) | |
1f0275e3 | 349 | { |
bf3816c7 MS |
350 | unquote(uriName, best->fullName, sizeof(uriName)); |
351 | ||
1f0275e3 | 352 | httpAssembleURI(HTTP_URI_CODING_ALL, device_uri, sizeof(device_uri), |
38e73f87 | 353 | "dnssd", NULL, uriName, 0, |
1f0275e3 MS |
354 | best->cups_shared ? "/cups" : "/"); |
355 | ||
749b1e90 | 356 | cupsBackendReport("network", device_uri, best->make_and_model, |
238c3832 | 357 | best->name, best->device_id, NULL); |
1f0275e3 MS |
358 | best->sent = 1; |
359 | best = device; | |
d4d03398 MS |
360 | |
361 | sent ++; | |
1f0275e3 MS |
362 | } |
363 | else if (best->priority > device->priority || | |
364 | (best->priority == device->priority && | |
365 | best->type < device->type)) | |
366 | { | |
367 | best->sent = 1; | |
368 | best = device; | |
d4d03398 MS |
369 | |
370 | sent ++; | |
1f0275e3 MS |
371 | } |
372 | else | |
d4d03398 | 373 | { |
1f0275e3 | 374 | device->sent = 1; |
d4d03398 MS |
375 | |
376 | sent ++; | |
377 | } | |
1f0275e3 | 378 | } |
d4d03398 | 379 | } |
7a14d768 | 380 | |
1f0275e3 MS |
381 | if (best) |
382 | { | |
bf3816c7 MS |
383 | unquote(uriName, best->fullName, sizeof(uriName)); |
384 | ||
1f0275e3 | 385 | httpAssembleURI(HTTP_URI_CODING_ALL, device_uri, sizeof(device_uri), |
38e73f87 | 386 | "dnssd", NULL, uriName, 0, |
1f0275e3 | 387 | best->cups_shared ? "/cups" : "/"); |
7a14d768 | 388 | |
749b1e90 | 389 | cupsBackendReport("network", device_uri, best->make_and_model, |
238c3832 | 390 | best->name, best->device_id, NULL); |
1f0275e3 | 391 | best->sent = 1; |
d4d03398 | 392 | sent ++; |
1f0275e3 | 393 | } |
d4d03398 MS |
394 | |
395 | if (sent == cupsArrayCount(devices)) | |
396 | break; | |
7a14d768 MS |
397 | } |
398 | } | |
38e73f87 MS |
399 | |
400 | return (CUPS_BACKEND_OK); | |
7a14d768 MS |
401 | } |
402 | ||
403 | ||
404 | /* | |
405 | * 'browse_callback()' - Browse devices. | |
406 | */ | |
407 | ||
408 | static void | |
409 | browse_callback( | |
410 | DNSServiceRef sdRef, /* I - Service reference */ | |
411 | DNSServiceFlags flags, /* I - Option flags */ | |
412 | uint32_t interfaceIndex, /* I - Interface number */ | |
413 | DNSServiceErrorType errorCode, /* I - Error, if any */ | |
414 | const char *serviceName, /* I - Name of service/device */ | |
415 | const char *regtype, /* I - Type of service */ | |
416 | const char *replyDomain, /* I - Service domain */ | |
417 | void *context) /* I - Devices array */ | |
418 | { | |
419 | fprintf(stderr, "DEBUG2: browse_callback(sdRef=%p, flags=%x, " | |
420 | "interfaceIndex=%d, errorCode=%d, serviceName=\"%s\", " | |
421 | "regtype=\"%s\", replyDomain=\"%s\", context=%p)\n", | |
422 | sdRef, flags, interfaceIndex, errorCode, | |
423 | serviceName ? serviceName : "(null)", | |
424 | regtype ? regtype : "(null)", | |
425 | replyDomain ? replyDomain : "(null)", | |
426 | context); | |
427 | ||
428 | /* | |
429 | * Only process "add" data... | |
430 | */ | |
431 | ||
432 | if (errorCode != kDNSServiceErr_NoError || !(flags & kDNSServiceFlagsAdd)) | |
433 | return; | |
434 | ||
435 | /* | |
436 | * Get the device... | |
437 | */ | |
438 | ||
439 | get_device((cups_array_t *)context, serviceName, regtype, replyDomain); | |
440 | } | |
441 | ||
442 | ||
443 | /* | |
444 | * 'browse_local_callback()' - Browse local devices. | |
445 | */ | |
446 | ||
447 | static void | |
448 | browse_local_callback( | |
449 | DNSServiceRef sdRef, /* I - Service reference */ | |
450 | DNSServiceFlags flags, /* I - Option flags */ | |
451 | uint32_t interfaceIndex, /* I - Interface number */ | |
452 | DNSServiceErrorType errorCode, /* I - Error, if any */ | |
453 | const char *serviceName, /* I - Name of service/device */ | |
454 | const char *regtype, /* I - Type of service */ | |
455 | const char *replyDomain, /* I - Service domain */ | |
456 | void *context) /* I - Devices array */ | |
457 | { | |
458 | cups_device_t *device; /* Device */ | |
459 | ||
460 | ||
461 | fprintf(stderr, "DEBUG2: browse_local_callback(sdRef=%p, flags=%x, " | |
462 | "interfaceIndex=%d, errorCode=%d, serviceName=\"%s\", " | |
463 | "regtype=\"%s\", replyDomain=\"%s\", context=%p)\n", | |
464 | sdRef, flags, interfaceIndex, errorCode, | |
465 | serviceName ? serviceName : "(null)", | |
466 | regtype ? regtype : "(null)", | |
467 | replyDomain ? replyDomain : "(null)", | |
468 | context); | |
469 | ||
470 | /* | |
471 | * Only process "add" data... | |
472 | */ | |
473 | ||
474 | if (errorCode != kDNSServiceErr_NoError || !(flags & kDNSServiceFlagsAdd)) | |
475 | return; | |
476 | ||
477 | /* | |
478 | * Get the device... | |
479 | */ | |
480 | ||
481 | device = get_device((cups_array_t *)context, serviceName, regtype, | |
482 | replyDomain); | |
483 | ||
484 | /* | |
485 | * Hide locally-registered devices... | |
486 | */ | |
487 | ||
488 | fprintf(stderr, "DEBUG: Hiding local printer \"%s\"...\n", | |
489 | device->fullName); | |
490 | device->sent = 1; | |
491 | } | |
492 | ||
493 | ||
494 | /* | |
495 | * 'compare_devices()' - Compare two devices. | |
496 | */ | |
497 | ||
498 | static int /* O - Result of comparison */ | |
499 | compare_devices(cups_device_t *a, /* I - First device */ | |
500 | cups_device_t *b) /* I - Second device */ | |
501 | { | |
38e73f87 | 502 | return (strcmp(a->name, b->name)); |
7a14d768 MS |
503 | } |
504 | ||
505 | ||
506 | /* | |
507 | * 'exec_backend()' - Execute the backend that corresponds to the | |
508 | * resolved service name. | |
509 | */ | |
510 | ||
511 | static void | |
512 | exec_backend(char **argv) /* I - Command-line arguments */ | |
513 | { | |
514 | const char *resolved_uri, /* Resolved device URI */ | |
515 | *cups_serverbin; /* Location of programs */ | |
516 | char scheme[1024], /* Scheme from URI */ | |
517 | *ptr, /* Pointer into scheme */ | |
518 | filename[1024]; /* Backend filename */ | |
519 | ||
520 | ||
521 | /* | |
522 | * Resolve the device URI... | |
523 | */ | |
524 | ||
e07d4801 MS |
525 | job_canceled = -1; |
526 | ||
0268488e MS |
527 | while ((resolved_uri = cupsBackendDeviceURI(argv)) == NULL) |
528 | { | |
529 | _cupsLangPrintFilter(stderr, "INFO", _("Unable to locate printer.")); | |
530 | sleep(10); | |
531 | ||
532 | if (getenv("CLASS") != NULL) | |
533 | exit(CUPS_BACKEND_FAILED); | |
534 | } | |
7a14d768 MS |
535 | |
536 | /* | |
537 | * Extract the scheme from the URI... | |
538 | */ | |
539 | ||
540 | strlcpy(scheme, resolved_uri, sizeof(scheme)); | |
541 | if ((ptr = strchr(scheme, ':')) != NULL) | |
542 | *ptr = '\0'; | |
543 | ||
544 | /* | |
545 | * Get the filename of the backend... | |
546 | */ | |
547 | ||
548 | if ((cups_serverbin = getenv("CUPS_SERVERBIN")) == NULL) | |
549 | cups_serverbin = CUPS_SERVERBIN; | |
550 | ||
551 | snprintf(filename, sizeof(filename), "%s/backend/%s", cups_serverbin, scheme); | |
552 | ||
553 | /* | |
38e73f87 | 554 | * Overwrite the device URI and run the new backend... |
7a14d768 MS |
555 | */ |
556 | ||
557 | setenv("DEVICE_URI", resolved_uri, 1); | |
558 | ||
559 | argv[0] = (char *)resolved_uri; | |
560 | ||
561 | fprintf(stderr, "DEBUG: Executing backend \"%s\"...\n", filename); | |
562 | ||
563 | execv(filename, argv); | |
564 | ||
565 | fprintf(stderr, "ERROR: Unable to execute backend \"%s\": %s\n", filename, | |
566 | strerror(errno)); | |
567 | exit(CUPS_BACKEND_STOP); | |
568 | } | |
569 | ||
570 | ||
571 | /* | |
572 | * 'get_device()' - Create or update a device. | |
573 | */ | |
574 | ||
575 | static cups_device_t * /* O - Device */ | |
576 | get_device(cups_array_t *devices, /* I - Device array */ | |
577 | const char *serviceName, /* I - Name of service/device */ | |
578 | const char *regtype, /* I - Type of service */ | |
579 | const char *replyDomain) /* I - Service domain */ | |
580 | { | |
581 | cups_device_t key, /* Search key */ | |
582 | *device; /* Device */ | |
58dc1933 MS |
583 | char fullName[kDNSServiceMaxDomainName]; |
584 | /* Full name for query */ | |
7a14d768 MS |
585 | |
586 | ||
587 | /* | |
588 | * See if this is a new device... | |
589 | */ | |
590 | ||
38e73f87 | 591 | key.name = (char *)serviceName; |
7a14d768 | 592 | |
d4d03398 | 593 | if (!strcmp(regtype, "_ipp._tcp.")) |
7a14d768 | 594 | key.type = CUPS_DEVICE_IPP; |
d4d03398 MS |
595 | else if (!strcmp(regtype, "_ipps._tcp.") || |
596 | !strcmp(regtype, "_ipp-tls._tcp.")) | |
597 | key.type = CUPS_DEVICE_IPPS; | |
7a14d768 MS |
598 | else if (!strcmp(regtype, "_fax-ipp._tcp.")) |
599 | key.type = CUPS_DEVICE_FAX_IPP; | |
600 | else if (!strcmp(regtype, "_printer._tcp.")) | |
601 | key.type = CUPS_DEVICE_PRINTER; | |
602 | else if (!strcmp(regtype, "_pdl-datastream._tcp.")) | |
603 | key.type = CUPS_DEVICE_PDL_DATASTREAM; | |
604 | else | |
605 | key.type = CUPS_DEVICE_RIOUSBPRINT; | |
606 | ||
1f0275e3 MS |
607 | for (device = cupsArrayFind(devices, &key); |
608 | device; | |
609 | device = cupsArrayNext(devices)) | |
88f9aafc | 610 | if (_cups_strcasecmp(device->name, key.name)) |
1f0275e3 MS |
611 | break; |
612 | else if (device->type == key.type) | |
38e73f87 | 613 | { |
88f9aafc MS |
614 | if (!_cups_strcasecmp(device->domain, "local.") && |
615 | _cups_strcasecmp(device->domain, replyDomain)) | |
38e73f87 MS |
616 | { |
617 | /* | |
618 | * Update the .local listing to use the "global" domain name instead. | |
619 | * The backend will try local lookups first, then the global domain name. | |
620 | */ | |
621 | ||
622 | free(device->domain); | |
623 | device->domain = strdup(replyDomain); | |
624 | ||
625 | DNSServiceConstructFullName(fullName, device->name, regtype, | |
626 | replyDomain); | |
627 | free(device->fullName); | |
628 | device->fullName = strdup(fullName); | |
629 | } | |
630 | ||
1f0275e3 | 631 | return (device); |
38e73f87 | 632 | } |
7a14d768 | 633 | |
1f0275e3 MS |
634 | /* |
635 | * Yes, add the device... | |
636 | */ | |
7a14d768 | 637 | |
1f0275e3 MS |
638 | fprintf(stderr, "DEBUG: Found \"%s.%s%s\"...\n", serviceName, regtype, |
639 | replyDomain); | |
7a14d768 | 640 | |
1f0275e3 MS |
641 | device = calloc(sizeof(cups_device_t), 1); |
642 | device->name = strdup(serviceName); | |
643 | device->domain = strdup(replyDomain); | |
644 | device->type = key.type; | |
645 | device->priority = 50; | |
7a14d768 | 646 | |
1f0275e3 | 647 | cupsArrayAdd(devices, device); |
7a14d768 MS |
648 | |
649 | /* | |
1f0275e3 | 650 | * Set the "full name" of this service, which is used for queries... |
7a14d768 MS |
651 | */ |
652 | ||
58dc1933 | 653 | DNSServiceConstructFullName(fullName, serviceName, regtype, replyDomain); |
7a14d768 MS |
654 | device->fullName = strdup(fullName); |
655 | ||
656 | return (device); | |
657 | } | |
658 | ||
659 | ||
660 | /* | |
661 | * 'query_callback()' - Process query data. | |
662 | */ | |
663 | ||
664 | static void | |
665 | query_callback( | |
666 | DNSServiceRef sdRef, /* I - Service reference */ | |
667 | DNSServiceFlags flags, /* I - Data flags */ | |
668 | uint32_t interfaceIndex, /* I - Interface */ | |
669 | DNSServiceErrorType errorCode, /* I - Error, if any */ | |
670 | const char *fullName, /* I - Full service name */ | |
671 | uint16_t rrtype, /* I - Record type */ | |
672 | uint16_t rrclass, /* I - Record class */ | |
673 | uint16_t rdlen, /* I - Length of record data */ | |
674 | const void *rdata, /* I - Record data */ | |
675 | uint32_t ttl, /* I - Time-to-live */ | |
676 | void *context) /* I - Devices array */ | |
677 | { | |
678 | cups_array_t *devices; /* Device array */ | |
679 | char name[1024], /* Service name */ | |
238c3832 MS |
680 | *ptr; /* Pointer into string */ |
681 | cups_device_t dkey, /* Search key */ | |
7a14d768 MS |
682 | *device; /* Device */ |
683 | ||
684 | ||
685 | fprintf(stderr, "DEBUG2: query_callback(sdRef=%p, flags=%x, " | |
686 | "interfaceIndex=%d, errorCode=%d, fullName=\"%s\", " | |
687 | "rrtype=%u, rrclass=%u, rdlen=%u, rdata=%p, ttl=%u, " | |
688 | "context=%p)\n", | |
689 | sdRef, flags, interfaceIndex, errorCode, | |
690 | fullName ? fullName : "(null)", rrtype, rrclass, rdlen, rdata, ttl, | |
691 | context); | |
692 | ||
693 | /* | |
694 | * Only process "add" data... | |
695 | */ | |
696 | ||
697 | if (errorCode != kDNSServiceErr_NoError || !(flags & kDNSServiceFlagsAdd)) | |
698 | return; | |
699 | ||
700 | /* | |
701 | * Lookup the service in the devices array. | |
702 | */ | |
703 | ||
238c3832 MS |
704 | devices = (cups_array_t *)context; |
705 | dkey.name = name; | |
7a14d768 MS |
706 | |
707 | unquote(name, fullName, sizeof(name)); | |
708 | ||
238c3832 MS |
709 | if ((dkey.domain = strstr(name, "._tcp.")) != NULL) |
710 | dkey.domain += 6; | |
7a14d768 | 711 | else |
238c3832 | 712 | dkey.domain = (char *)"local."; |
7a14d768 MS |
713 | |
714 | if ((ptr = strstr(name, "._")) != NULL) | |
715 | *ptr = '\0'; | |
716 | ||
d4d03398 | 717 | if (strstr(fullName, "_ipp._tcp.")) |
238c3832 | 718 | dkey.type = CUPS_DEVICE_IPP; |
d4d03398 MS |
719 | else if (strstr(fullName, "_ipps._tcp.") || |
720 | strstr(fullName, "_ipp-tls._tcp.")) | |
721 | dkey.type = CUPS_DEVICE_IPPS; | |
1f0275e3 | 722 | else if (strstr(fullName, "_fax-ipp._tcp.")) |
238c3832 | 723 | dkey.type = CUPS_DEVICE_FAX_IPP; |
1f0275e3 | 724 | else if (strstr(fullName, "_printer._tcp.")) |
238c3832 | 725 | dkey.type = CUPS_DEVICE_PRINTER; |
1f0275e3 | 726 | else if (strstr(fullName, "_pdl-datastream._tcp.")) |
238c3832 | 727 | dkey.type = CUPS_DEVICE_PDL_DATASTREAM; |
1f0275e3 | 728 | else |
238c3832 | 729 | dkey.type = CUPS_DEVICE_RIOUSBPRINT; |
1f0275e3 | 730 | |
238c3832 | 731 | for (device = cupsArrayFind(devices, &dkey); |
1f0275e3 MS |
732 | device; |
733 | device = cupsArrayNext(devices)) | |
7a14d768 | 734 | { |
88f9aafc MS |
735 | if (_cups_strcasecmp(device->name, dkey.name) || |
736 | _cups_strcasecmp(device->domain, dkey.domain)) | |
1f0275e3 MS |
737 | { |
738 | device = NULL; | |
739 | break; | |
740 | } | |
238c3832 | 741 | else if (device->type == dkey.type) |
1f0275e3 MS |
742 | { |
743 | /* | |
744 | * Found it, pull out the priority and make and model from the TXT | |
745 | * record and save it... | |
746 | */ | |
7a14d768 | 747 | |
238c3832 MS |
748 | const uint8_t *data, /* Pointer into data */ |
749 | *datanext, /* Next key/value pair */ | |
750 | *dataend; /* End of entire TXT record */ | |
751 | uint8_t datalen; /* Length of current key/value pair */ | |
752 | char key[256], /* Key string */ | |
753 | value[256], /* Value string */ | |
754 | make_and_model[512], | |
755 | /* Manufacturer and model */ | |
756 | model[256], /* Model */ | |
757 | device_id[2048];/* 1284 device ID */ | |
7a14d768 MS |
758 | |
759 | ||
238c3832 MS |
760 | device_id[0] = '\0'; |
761 | make_and_model[0] = '\0'; | |
7a14d768 | 762 | |
238c3832 MS |
763 | strcpy(model, "Unknown"); |
764 | ||
765 | for (data = rdata, dataend = data + rdlen; | |
766 | data < dataend; | |
767 | data = datanext) | |
1f0275e3 | 768 | { |
238c3832 MS |
769 | /* |
770 | * Read a key/value pair starting with an 8-bit length. Since the | |
771 | * length is 8 bits and the size of the key/value buffers is 256, we | |
772 | * don't need to check for overflow... | |
773 | */ | |
7a14d768 | 774 | |
238c3832 | 775 | datalen = *data++; |
7a14d768 | 776 | |
238c3832 MS |
777 | if (!datalen || (data + datalen) >= dataend) |
778 | break; | |
1f0275e3 | 779 | |
238c3832 | 780 | datanext = data + datalen; |
1f0275e3 | 781 | |
238c3832 MS |
782 | for (ptr = key; data < datanext && *data != '='; data ++) |
783 | *ptr++ = *data; | |
784 | *ptr = '\0'; | |
785 | ||
786 | if (data < datanext && *data == '=') | |
1f0275e3 | 787 | { |
238c3832 | 788 | data ++; |
1f0275e3 | 789 | |
238c3832 MS |
790 | if (data < datanext) |
791 | memcpy(value, data, datanext - data); | |
792 | value[datanext - data] = '\0'; | |
d4d03398 MS |
793 | |
794 | fprintf(stderr, "DEBUG2: query_callback: \"%s=%s\".\n", | |
795 | key, value); | |
1f0275e3 MS |
796 | } |
797 | else | |
d4d03398 MS |
798 | { |
799 | fprintf(stderr, "DEBUG2: query_callback: \"%s\" with no value.\n", | |
800 | key); | |
238c3832 | 801 | continue; |
d4d03398 | 802 | } |
238c3832 | 803 | |
88f9aafc | 804 | if (!_cups_strncasecmp(key, "usb_", 4)) |
1f0275e3 | 805 | { |
238c3832 MS |
806 | /* |
807 | * Add USB device ID information... | |
808 | */ | |
7a14d768 | 809 | |
238c3832 MS |
810 | ptr = device_id + strlen(device_id); |
811 | snprintf(ptr, sizeof(device_id) - (ptr - device_id), "%s:%s;", | |
812 | key + 4, value); | |
813 | } | |
814 | ||
88f9aafc MS |
815 | if (!_cups_strcasecmp(key, "usb_MFG") || !_cups_strcasecmp(key, "usb_MANU") || |
816 | !_cups_strcasecmp(key, "usb_MANUFACTURER")) | |
238c3832 | 817 | strcpy(make_and_model, value); |
88f9aafc | 818 | else if (!_cups_strcasecmp(key, "usb_MDL") || !_cups_strcasecmp(key, "usb_MODEL")) |
238c3832 | 819 | strcpy(model, value); |
88f9aafc | 820 | else if (!_cups_strcasecmp(key, "product") && !strstr(value, "Ghostscript")) |
1f0275e3 | 821 | { |
238c3832 | 822 | if (value[0] == '(') |
1f0275e3 | 823 | { |
238c3832 MS |
824 | /* |
825 | * Strip parenthesis... | |
826 | */ | |
1f0275e3 | 827 | |
238c3832 | 828 | if ((ptr = value + strlen(value) - 1) > value && *ptr == ')') |
1f0275e3 | 829 | *ptr = '\0'; |
238c3832 MS |
830 | |
831 | strcpy(model, value + 1); | |
1f0275e3 MS |
832 | } |
833 | else | |
238c3832 MS |
834 | strcpy(model, value); |
835 | } | |
88f9aafc | 836 | else if (!_cups_strcasecmp(key, "ty")) |
238c3832 MS |
837 | { |
838 | strcpy(model, value); | |
839 | ||
840 | if ((ptr = strchr(model, ',')) != NULL) | |
841 | *ptr = '\0'; | |
7a14d768 | 842 | } |
88f9aafc | 843 | else if (!_cups_strcasecmp(key, "priority")) |
238c3832 MS |
844 | device->priority = atoi(value); |
845 | else if ((device->type == CUPS_DEVICE_IPP || | |
d4d03398 | 846 | device->type == CUPS_DEVICE_IPPS || |
238c3832 | 847 | device->type == CUPS_DEVICE_PRINTER) && |
88f9aafc | 848 | !_cups_strcasecmp(key, "printer-type")) |
238c3832 MS |
849 | { |
850 | /* | |
851 | * This is a CUPS printer! | |
852 | */ | |
853 | ||
854 | device->cups_shared = 1; | |
855 | ||
856 | if (device->type == CUPS_DEVICE_PRINTER) | |
857 | device->sent = 1; | |
858 | } | |
859 | } | |
860 | ||
861 | if (device->device_id) | |
862 | free(device->device_id); | |
863 | ||
864 | if (!device_id[0] && strcmp(model, "Unknown")) | |
865 | { | |
866 | if (make_and_model[0]) | |
867 | snprintf(device_id, sizeof(device_id), "MFG:%s;MDL:%s;", | |
868 | make_and_model, model); | |
88f9aafc | 869 | else if (!_cups_strncasecmp(model, "designjet ", 10)) |
238c3832 | 870 | snprintf(device_id, sizeof(device_id), "MFG:HP;MDL:%s", model + 10); |
88f9aafc | 871 | else if (!_cups_strncasecmp(model, "stylus ", 7)) |
238c3832 MS |
872 | snprintf(device_id, sizeof(device_id), "MFG:EPSON;MDL:%s", model + 7); |
873 | else if ((ptr = strchr(model, ' ')) != NULL) | |
874 | { | |
875 | /* | |
876 | * Assume the first word is the make... | |
877 | */ | |
878 | ||
879 | memcpy(make_and_model, model, ptr - model); | |
880 | make_and_model[ptr - model] = '\0'; | |
881 | ||
882 | snprintf(device_id, sizeof(device_id), "MFG:%s;MDL:%s", | |
883 | make_and_model, ptr + 1); | |
884 | } | |
7a14d768 | 885 | } |
238c3832 MS |
886 | |
887 | if (device_id[0]) | |
888 | device->device_id = strdup(device_id); | |
1f0275e3 | 889 | else |
238c3832 | 890 | device->device_id = NULL; |
7a14d768 | 891 | |
1f0275e3 MS |
892 | if (device->make_and_model) |
893 | free(device->make_and_model); | |
7a14d768 | 894 | |
1f0275e3 MS |
895 | if (make_and_model[0]) |
896 | { | |
897 | strlcat(make_and_model, " ", sizeof(make_and_model)); | |
898 | strlcat(make_and_model, model, sizeof(make_and_model)); | |
238c3832 | 899 | |
1f0275e3 MS |
900 | device->make_and_model = strdup(make_and_model); |
901 | } | |
902 | else | |
903 | device->make_and_model = strdup(model); | |
1f0275e3 | 904 | break; |
7a14d768 MS |
905 | } |
906 | } | |
1f0275e3 MS |
907 | |
908 | if (!device) | |
7a14d768 MS |
909 | fprintf(stderr, "DEBUG: Ignoring TXT record for \"%s\"...\n", fullName); |
910 | } | |
911 | ||
912 | ||
38e73f87 MS |
913 | /* |
914 | * 'sigterm_handler()' - Handle termination signals... | |
915 | */ | |
916 | ||
917 | static void | |
918 | sigterm_handler(int sig) /* I - Signal number (unused) */ | |
919 | { | |
321d8d57 MS |
920 | (void)sig; |
921 | ||
e07d4801 MS |
922 | if (job_canceled) |
923 | exit(CUPS_BACKEND_OK); | |
924 | else | |
925 | job_canceled = 1; | |
38e73f87 MS |
926 | } |
927 | ||
928 | ||
7a14d768 MS |
929 | /* |
930 | * 'unquote()' - Unquote a name string. | |
931 | */ | |
932 | ||
933 | static void | |
934 | unquote(char *dst, /* I - Destination buffer */ | |
935 | const char *src, /* I - Source string */ | |
936 | size_t dstsize) /* I - Size of destination buffer */ | |
937 | { | |
938 | char *dstend = dst + dstsize - 1; /* End of destination buffer */ | |
939 | ||
940 | ||
941 | while (*src && dst < dstend) | |
942 | { | |
943 | if (*src == '\\') | |
944 | { | |
945 | src ++; | |
946 | if (isdigit(src[0] & 255) && isdigit(src[1] & 255) && | |
947 | isdigit(src[2] & 255)) | |
948 | { | |
949 | *dst++ = ((((src[0] - '0') * 10) + src[1] - '0') * 10) + src[2] - '0'; | |
950 | src += 3; | |
951 | } | |
952 | else | |
953 | *dst++ = *src++; | |
954 | } | |
955 | else | |
956 | *dst++ = *src ++; | |
957 | } | |
958 | ||
959 | *dst = '\0'; | |
960 | } | |
961 | ||
962 | ||
963 | /* | |
964 | * End of "$Id$". | |
965 | */ |