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Commit | Line | Data |
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75bd9771 MS |
1 | /* |
2 | * "$Id$" | |
3 | * | |
12f89d24 | 4 | * LIBUSB interface code for CUPS. |
75bd9771 | 5 | * |
12f89d24 | 6 | * Copyright 2007-2012 by Apple Inc. |
75bd9771 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 | * which should have been included with this file. If this file is | |
12 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
13 | * | |
14 | * Contents: | |
15 | * | |
12f89d24 MS |
16 | * list_devices() - List the available printers. |
17 | * print_device() - Print a file to a USB device. | |
18 | * close_device() - Close the connection to the USB printer. | |
19 | * find_device() - Find or enumerate USB printers. | |
20 | * get_device_id() - Get the IEEE-1284 device ID for the printer. | |
21 | * list_cb() - List USB printers for discovery. | |
22 | * make_device_uri() - Create a device URI for a USB printer. | |
23 | * open_device() - Open a connection to the USB printer. | |
24 | * print_cb() - Find a USB printer for printing. | |
25 | * read_thread() - Thread to read the backchannel data on. | |
26 | * sidechannel_thread() - Handle side-channel requests. | |
27 | * soft_reset() - Send a soft reset to the device. | |
75bd9771 MS |
28 | */ |
29 | ||
30 | /* | |
31 | * Include necessary headers... | |
32 | */ | |
33 | ||
12f89d24 | 34 | #include <libusb.h> |
39ff2fe7 | 35 | #include <cups/cups-private.h> |
12f89d24 MS |
36 | #include <pthread.h> |
37 | #include <sys/select.h> | |
38 | #include <sys/types.h> | |
39 | #include <sys/stat.h> | |
40 | #include <sys/time.h> | |
41 | #include <unistd.h> | |
42 | ||
43 | ||
44 | /* | |
45 | * WAIT_EOF_DELAY is number of seconds we'll wait for responses from | |
46 | * the printer after we've finished sending all the data | |
47 | */ | |
48 | ||
49 | #define WAIT_EOF 0 | |
50 | #define WAIT_EOF_DELAY 7 | |
51 | #define WAIT_SIDE_DELAY 3 | |
52 | #define DEFAULT_TIMEOUT 5000L | |
75bd9771 MS |
53 | |
54 | ||
55 | /* | |
56 | * Local types... | |
57 | */ | |
58 | ||
59 | typedef struct usb_printer_s /**** USB Printer Data ****/ | |
60 | { | |
12f89d24 | 61 | struct libusb_device *device; /* Device info */ |
75bd9771 MS |
62 | int conf, /* Configuration */ |
63 | iface, /* Interface */ | |
64 | altset, /* Alternate setting */ | |
65 | write_endp, /* Write endpoint */ | |
12f89d24 MS |
66 | read_endp, /* Read endpoint */ |
67 | protocol, /* Protocol: 1 = Uni-di, 2 = Bi-di. */ | |
68 | usblp_attached; /* Is the "usblp" kernel module | |
69 | attached? */ | |
70 | struct libusb_device_handle *handle; /* Open handle to device */ | |
75bd9771 MS |
71 | } usb_printer_t; |
72 | ||
73 | typedef int (*usb_cb_t)(usb_printer_t *, const char *, const char *, | |
74 | const void *); | |
75 | ||
12f89d24 MS |
76 | typedef struct usb_globals_s |
77 | { | |
78 | usb_printer_t *printer; /* Printer */ | |
79 | ||
80 | pthread_mutex_t read_thread_mutex; | |
81 | pthread_cond_t read_thread_cond; | |
82 | int read_thread_stop; | |
83 | int read_thread_done; | |
84 | ||
85 | pthread_mutex_t readwrite_lock_mutex; | |
86 | pthread_cond_t readwrite_lock_cond; | |
87 | int readwrite_lock; | |
88 | ||
89 | int print_fd; /* File descriptor to print */ | |
90 | ssize_t print_bytes; /* Print bytes read */ | |
91 | ||
92 | int wait_eof; | |
93 | int drain_output; /* Drain all pending output */ | |
94 | int bidi_flag; /* 0=unidirectional, 1=bidirectional */ | |
95 | ||
96 | pthread_mutex_t sidechannel_thread_mutex; | |
97 | pthread_cond_t sidechannel_thread_cond; | |
98 | int sidechannel_thread_stop; | |
99 | int sidechannel_thread_done; | |
100 | } usb_globals_t; | |
101 | ||
102 | ||
103 | /* | |
104 | * Globals... | |
105 | */ | |
106 | ||
107 | usb_globals_t g = { 0 }; /* Globals */ | |
108 | libusb_device **list; /* List of connected USB devices */ | |
109 | ||
75bd9771 MS |
110 | |
111 | /* | |
112 | * Local functions... | |
113 | */ | |
114 | ||
115 | static int close_device(usb_printer_t *printer); | |
116 | static usb_printer_t *find_device(usb_cb_t cb, const void *data); | |
117 | static int get_device_id(usb_printer_t *printer, char *buffer, | |
118 | size_t bufsize); | |
119 | static int list_cb(usb_printer_t *printer, const char *device_uri, | |
120 | const char *device_id, const void *data); | |
121 | static char *make_device_uri(usb_printer_t *printer, | |
122 | const char *device_id, | |
123 | char *uri, size_t uri_size); | |
124 | static int open_device(usb_printer_t *printer, int verbose); | |
125 | static int print_cb(usb_printer_t *printer, const char *device_uri, | |
126 | const char *device_id, const void *data); | |
12f89d24 MS |
127 | static void *read_thread(void *reference); |
128 | static void *sidechannel_thread(void *reference); | |
129 | static void soft_reset(void); | |
75bd9771 MS |
130 | |
131 | ||
132 | /* | |
133 | * 'list_devices()' - List the available printers. | |
134 | */ | |
135 | ||
136 | void | |
137 | list_devices(void) | |
138 | { | |
139 | fputs("DEBUG: list_devices\n", stderr); | |
140 | find_device(list_cb, NULL); | |
141 | } | |
142 | ||
143 | ||
144 | /* | |
145 | * 'print_device()' - Print a file to a USB device. | |
146 | */ | |
147 | ||
148 | int /* O - Exit status */ | |
149 | print_device(const char *uri, /* I - Device URI */ | |
150 | const char *hostname, /* I - Hostname/manufacturer */ | |
151 | const char *resource, /* I - Resource/modelname */ | |
152 | char *options, /* I - Device options/serial number */ | |
153 | int print_fd, /* I - File descriptor to print */ | |
154 | int copies, /* I - Copies to print */ | |
155 | int argc, /* I - Number of command-line arguments (6 or 7) */ | |
156 | char *argv[]) /* I - Command-line arguments */ | |
157 | { | |
12f89d24 MS |
158 | int bytes; /* Bytes written */ |
159 | ssize_t total_bytes; /* Total bytes written */ | |
75bd9771 | 160 | struct sigaction action; /* Actions for POSIX signals */ |
12f89d24 MS |
161 | int status = CUPS_BACKEND_OK, |
162 | /* Function results */ | |
163 | iostatus; /* Current IO status */ | |
164 | pthread_t read_thread_id, /* Read thread */ | |
165 | sidechannel_thread_id; /* Side-channel thread */ | |
166 | int have_sidechannel = 0; /* Was the side-channel thread started? */ | |
167 | struct stat sidechannel_info; /* Side-channel file descriptor info */ | |
168 | unsigned char print_buffer[8192], /* Print data buffer */ | |
169 | *print_ptr; /* Pointer into print data buffer */ | |
170 | fd_set input_set; /* Input set for select() */ | |
171 | int nfds; /* Number of file descriptors */ | |
172 | struct timeval *timeout, /* Timeout pointer */ | |
173 | tv; /* Time value */ | |
174 | struct timespec cond_timeout; /* pthread condition timeout */ | |
75bd9771 MS |
175 | |
176 | ||
12f89d24 MS |
177 | /* |
178 | * See if the side-channel descriptor is valid... | |
179 | */ | |
180 | ||
181 | have_sidechannel = !fstat(CUPS_SC_FD, &sidechannel_info) && | |
182 | S_ISSOCK(sidechannel_info.st_mode); | |
183 | ||
184 | g.wait_eof = WAIT_EOF; | |
75bd9771 MS |
185 | |
186 | /* | |
187 | * Connect to the printer... | |
188 | */ | |
189 | ||
12f89d24 | 190 | while ((g.printer = find_device(print_cb, uri)) == NULL) |
75bd9771 | 191 | { |
0837b7e8 MS |
192 | _cupsLangPrintFilter(stderr, "INFO", |
193 | _("Waiting for printer to become available.")); | |
75bd9771 MS |
194 | sleep(5); |
195 | } | |
196 | ||
12f89d24 | 197 | g.print_fd = print_fd; |
75bd9771 MS |
198 | |
199 | /* | |
200 | * If we are printing data from a print driver on stdin, ignore SIGTERM | |
201 | * so that the driver can finish out any page data, e.g. to eject the | |
202 | * current page. We only do this for stdin printing as otherwise there | |
203 | * is no way to cancel a raw print job... | |
204 | */ | |
205 | ||
206 | if (!print_fd) | |
207 | { | |
208 | memset(&action, 0, sizeof(action)); | |
209 | ||
210 | sigemptyset(&action.sa_mask); | |
211 | action.sa_handler = SIG_IGN; | |
212 | sigaction(SIGTERM, &action, NULL); | |
213 | } | |
214 | ||
12f89d24 MS |
215 | /* |
216 | * Start the side channel thread if the descriptor is valid... | |
217 | */ | |
218 | ||
219 | pthread_mutex_init(&g.readwrite_lock_mutex, NULL); | |
220 | pthread_cond_init(&g.readwrite_lock_cond, NULL); | |
221 | g.readwrite_lock = 1; | |
222 | ||
223 | if (have_sidechannel) | |
224 | { | |
225 | g.sidechannel_thread_stop = 0; | |
226 | g.sidechannel_thread_done = 0; | |
227 | ||
228 | pthread_cond_init(&g.sidechannel_thread_cond, NULL); | |
229 | pthread_mutex_init(&g.sidechannel_thread_mutex, NULL); | |
230 | ||
231 | if (pthread_create(&sidechannel_thread_id, NULL, sidechannel_thread, NULL)) | |
232 | { | |
233 | fprintf(stderr, "DEBUG: Fatal USB error.\n"); | |
234 | _cupsLangPrintFilter(stderr, "ERROR", | |
235 | _("There was an unrecoverable USB error.")); | |
236 | fputs("DEBUG: Couldn't create side-channel thread.\n", stderr); | |
237 | close_device(g.printer); | |
238 | return (CUPS_BACKEND_STOP); | |
239 | } | |
240 | } | |
241 | ||
242 | /* | |
243 | * Get the read thread going... | |
244 | */ | |
245 | ||
246 | g.read_thread_stop = 0; | |
247 | g.read_thread_done = 0; | |
248 | ||
249 | pthread_cond_init(&g.read_thread_cond, NULL); | |
250 | pthread_mutex_init(&g.read_thread_mutex, NULL); | |
251 | ||
252 | if (pthread_create(&read_thread_id, NULL, read_thread, NULL)) | |
253 | { | |
254 | fprintf(stderr, "DEBUG: Fatal USB error.\n"); | |
255 | _cupsLangPrintFilter(stderr, "ERROR", | |
256 | _("There was an unrecoverable USB error.")); | |
257 | fputs("DEBUG: Couldn't create read thread.\n", stderr); | |
258 | close_device(g.printer); | |
259 | return (CUPS_BACKEND_STOP); | |
260 | } | |
261 | ||
262 | /* | |
263 | * The main thread sends the print file... | |
264 | */ | |
75bd9771 | 265 | |
12f89d24 MS |
266 | g.drain_output = 0; |
267 | g.print_bytes = 0; | |
268 | total_bytes = 0; | |
269 | print_ptr = print_buffer; | |
005dd1eb | 270 | |
12f89d24 | 271 | while (status == CUPS_BACKEND_OK && copies-- > 0) |
75bd9771 | 272 | { |
12f89d24 | 273 | _cupsLangPrintFilter(stderr, "INFO", _("Sending data to printer.")); |
75bd9771 | 274 | |
12f89d24 | 275 | if (print_fd != STDIN_FILENO) |
75bd9771 MS |
276 | { |
277 | fputs("PAGE: 1 1\n", stderr); | |
278 | lseek(print_fd, 0, SEEK_SET); | |
279 | } | |
280 | ||
12f89d24 | 281 | while (status == CUPS_BACKEND_OK) |
75bd9771 | 282 | { |
12f89d24 MS |
283 | FD_ZERO(&input_set); |
284 | ||
285 | if (!g.print_bytes) | |
286 | FD_SET(print_fd, &input_set); | |
287 | ||
288 | /* | |
289 | * Calculate select timeout... | |
290 | * If we have data waiting to send timeout is 100ms. | |
291 | * else if we're draining print_fd timeout is 0. | |
292 | * else we're waiting forever... | |
293 | */ | |
294 | ||
295 | if (g.print_bytes) | |
296 | { | |
297 | tv.tv_sec = 0; | |
298 | tv.tv_usec = 100000; /* 100ms */ | |
299 | timeout = &tv; | |
300 | } | |
301 | else if (g.drain_output) | |
302 | { | |
303 | tv.tv_sec = 0; | |
304 | tv.tv_usec = 0; | |
305 | timeout = &tv; | |
306 | } | |
307 | else | |
308 | timeout = NULL; | |
309 | ||
310 | /* | |
311 | * I/O is unlocked around select... | |
312 | */ | |
313 | ||
314 | pthread_mutex_lock(&g.readwrite_lock_mutex); | |
315 | g.readwrite_lock = 0; | |
316 | pthread_cond_signal(&g.readwrite_lock_cond); | |
317 | pthread_mutex_unlock(&g.readwrite_lock_mutex); | |
318 | ||
319 | nfds = select(print_fd + 1, &input_set, NULL, NULL, timeout); | |
320 | ||
321 | /* | |
322 | * Reacquire the lock... | |
323 | */ | |
324 | ||
325 | pthread_mutex_lock(&g.readwrite_lock_mutex); | |
326 | while (g.readwrite_lock) | |
327 | pthread_cond_wait(&g.readwrite_lock_cond, &g.readwrite_lock_mutex); | |
328 | g.readwrite_lock = 1; | |
329 | pthread_mutex_unlock(&g.readwrite_lock_mutex); | |
330 | ||
331 | if (nfds < 0) | |
332 | { | |
333 | if (errno == EINTR && total_bytes == 0) | |
334 | { | |
335 | fputs("DEBUG: Received an interrupt before any bytes were " | |
336 | "written, aborting.\n", stderr); | |
337 | close_device(g.printer); | |
338 | return (CUPS_BACKEND_OK); | |
339 | } | |
340 | else if (errno != EAGAIN && errno != EINTR) | |
341 | { | |
342 | _cupsLangPrintFilter(stderr, "ERROR", | |
343 | _("Unable to read print data.")); | |
344 | perror("DEBUG: select"); | |
345 | close_device(g.printer); | |
346 | return (CUPS_BACKEND_FAILED); | |
347 | } | |
348 | } | |
349 | ||
350 | /* | |
351 | * If drain output has finished send a response... | |
352 | */ | |
353 | ||
354 | if (g.drain_output && !nfds && !g.print_bytes) | |
355 | { | |
356 | /* Send a response... */ | |
357 | cupsSideChannelWrite(CUPS_SC_CMD_DRAIN_OUTPUT, CUPS_SC_STATUS_OK, NULL, 0, 1.0); | |
358 | g.drain_output = 0; | |
359 | } | |
360 | ||
18ecb428 | 361 | /* |
12f89d24 | 362 | * Check if we have print data ready... |
18ecb428 MS |
363 | */ |
364 | ||
12f89d24 | 365 | if (FD_ISSET(print_fd, &input_set)) |
75bd9771 | 366 | { |
12f89d24 MS |
367 | g.print_bytes = read(print_fd, print_buffer, sizeof(print_buffer)); |
368 | ||
369 | if (g.print_bytes < 0) | |
005dd1eb | 370 | { |
12f89d24 MS |
371 | /* |
372 | * Read error - bail if we don't see EAGAIN or EINTR... | |
373 | */ | |
374 | ||
375 | if (errno != EAGAIN && errno != EINTR) | |
005dd1eb | 376 | { |
0837b7e8 | 377 | _cupsLangPrintFilter(stderr, "ERROR", |
12f89d24 MS |
378 | _("Unable to read print data.")); |
379 | perror("DEBUG: read"); | |
380 | close_device(g.printer); | |
381 | return (CUPS_BACKEND_FAILED); | |
005dd1eb MS |
382 | } |
383 | ||
12f89d24 | 384 | g.print_bytes = 0; |
005dd1eb | 385 | } |
12f89d24 MS |
386 | else if (g.print_bytes == 0) |
387 | { | |
388 | /* | |
389 | * End of file, break out of the loop... | |
390 | */ | |
391 | ||
005dd1eb | 392 | break; |
12f89d24 MS |
393 | } |
394 | ||
395 | print_ptr = print_buffer; | |
396 | ||
397 | fprintf(stderr, "DEBUG: Read %d bytes of print data...\n", | |
398 | (int)g.print_bytes); | |
75bd9771 MS |
399 | } |
400 | ||
12f89d24 | 401 | if (g.print_bytes) |
18ecb428 | 402 | { |
12f89d24 MS |
403 | iostatus = libusb_bulk_transfer(g.printer->handle, |
404 | g.printer->write_endp, | |
405 | print_buffer, g.print_bytes, | |
406 | &bytes, 60000); | |
407 | /* | |
408 | * Ignore timeout errors, but retain the number of bytes written to | |
409 | * avoid sending duplicate data... | |
410 | */ | |
411 | ||
412 | if (iostatus == LIBUSB_ERROR_TIMEOUT) | |
413 | { | |
414 | fputs("DEBUG: Got USB transaction timeout during write.\n", stderr); | |
415 | iostatus = 0; | |
416 | } | |
417 | ||
418 | /* | |
419 | * If we've stalled, retry the write... | |
420 | */ | |
421 | ||
422 | else if (iostatus == LIBUSB_ERROR_PIPE) | |
423 | { | |
424 | fputs("DEBUG: Got USB pipe stalled during write.\n", stderr); | |
425 | ||
426 | iostatus = libusb_bulk_transfer(g.printer->handle, | |
427 | g.printer->write_endp, | |
428 | print_buffer, g.print_bytes, | |
429 | &bytes, 60000); | |
430 | } | |
431 | ||
432 | /* | |
433 | * Retry a write after an aborted write since we probably just got | |
434 | * SIGTERM... | |
435 | */ | |
436 | ||
437 | else if (iostatus == LIBUSB_ERROR_INTERRUPTED) | |
438 | { | |
439 | fputs("DEBUG: Got USB return aborted during write.\n", stderr); | |
440 | ||
441 | iostatus = libusb_bulk_transfer(g.printer->handle, | |
442 | g.printer->write_endp, | |
443 | print_buffer, g.print_bytes, | |
444 | &bytes, 60000); | |
445 | } | |
446 | ||
447 | if (iostatus) | |
448 | { | |
449 | /* | |
450 | * Write error - bail if we don't see an error we can retry... | |
451 | */ | |
452 | ||
453 | _cupsLangPrintFilter(stderr, "ERROR", | |
454 | _("Unable to send data to printer.")); | |
455 | fprintf(stderr, "DEBUG: libusb write operation returned %x.\n", | |
456 | iostatus); | |
457 | ||
458 | status = CUPS_BACKEND_FAILED; | |
459 | break; | |
460 | } | |
461 | else if (bytes > 0) | |
462 | { | |
463 | fprintf(stderr, "DEBUG: Wrote %d bytes of print data...\n", | |
464 | (int)bytes); | |
465 | ||
466 | g.print_bytes -= bytes; | |
467 | print_ptr += bytes; | |
468 | total_bytes += bytes; | |
469 | } | |
18ecb428 | 470 | } |
12f89d24 MS |
471 | |
472 | if (print_fd != 0 && status == CUPS_BACKEND_OK) | |
473 | fprintf(stderr, "DEBUG: Sending print file, " CUPS_LLFMT " bytes...\n", | |
474 | CUPS_LLCAST total_bytes); | |
75bd9771 MS |
475 | } |
476 | } | |
477 | ||
12f89d24 MS |
478 | fprintf(stderr, "DEBUG: Sent " CUPS_LLFMT " bytes...\n", |
479 | CUPS_LLCAST total_bytes); | |
480 | ||
75bd9771 | 481 | /* |
12f89d24 | 482 | * Signal the side channel thread to exit... |
75bd9771 MS |
483 | */ |
484 | ||
12f89d24 MS |
485 | if (have_sidechannel) |
486 | { | |
487 | close(CUPS_SC_FD); | |
488 | pthread_mutex_lock(&g.readwrite_lock_mutex); | |
489 | g.readwrite_lock = 0; | |
490 | pthread_cond_signal(&g.readwrite_lock_cond); | |
491 | pthread_mutex_unlock(&g.readwrite_lock_mutex); | |
492 | ||
493 | g.sidechannel_thread_stop = 1; | |
494 | pthread_mutex_lock(&g.sidechannel_thread_mutex); | |
495 | ||
496 | if (!g.sidechannel_thread_done) | |
497 | { | |
498 | gettimeofday(&tv, NULL); | |
499 | cond_timeout.tv_sec = tv.tv_sec + WAIT_SIDE_DELAY; | |
500 | cond_timeout.tv_nsec = tv.tv_usec * 1000; | |
75bd9771 | 501 | |
12f89d24 MS |
502 | while (!g.sidechannel_thread_done) |
503 | { | |
504 | if (pthread_cond_timedwait(&g.sidechannel_thread_cond, | |
505 | &g.sidechannel_thread_mutex, | |
506 | &cond_timeout) != 0) | |
507 | break; | |
508 | } | |
509 | } | |
510 | ||
511 | pthread_mutex_unlock(&g.sidechannel_thread_mutex); | |
512 | } | |
513 | ||
514 | /* | |
515 | * Signal the read thread to exit then wait 7 seconds for it to complete... | |
516 | */ | |
517 | ||
518 | g.read_thread_stop = 1; | |
519 | ||
520 | pthread_mutex_lock(&g.read_thread_mutex); | |
521 | ||
522 | if (!g.read_thread_done) | |
523 | { | |
524 | fputs("DEBUG: Waiting for read thread to exit...\n", stderr); | |
525 | ||
526 | gettimeofday(&tv, NULL); | |
527 | cond_timeout.tv_sec = tv.tv_sec + WAIT_EOF_DELAY; | |
528 | cond_timeout.tv_nsec = tv.tv_usec * 1000; | |
529 | ||
530 | while (!g.read_thread_done) | |
531 | { | |
532 | if (pthread_cond_timedwait(&g.read_thread_cond, &g.read_thread_mutex, | |
533 | &cond_timeout) != 0) | |
534 | break; | |
535 | } | |
536 | ||
537 | /* | |
538 | * If it didn't exit abort the pending read and wait an additional second... | |
539 | */ | |
540 | ||
541 | if (!g.read_thread_done) | |
542 | { | |
543 | fputs("DEBUG: Read thread still active, aborting the pending read...\n", | |
544 | stderr); | |
545 | ||
546 | g.wait_eof = 0; | |
547 | ||
548 | gettimeofday(&tv, NULL); | |
549 | cond_timeout.tv_sec = tv.tv_sec + 1; | |
550 | cond_timeout.tv_nsec = tv.tv_usec * 1000; | |
551 | ||
552 | while (!g.read_thread_done) | |
553 | { | |
554 | if (pthread_cond_timedwait(&g.read_thread_cond, &g.read_thread_mutex, | |
555 | &cond_timeout) != 0) | |
556 | break; | |
557 | } | |
558 | } | |
559 | } | |
560 | ||
561 | pthread_mutex_unlock(&g.read_thread_mutex); | |
562 | ||
563 | if (print_fd) | |
564 | close(print_fd); | |
565 | ||
566 | /* | |
567 | * Close the connection and input file and general clean up... | |
568 | */ | |
569 | ||
570 | close_device(g.printer); | |
571 | ||
572 | /* | |
573 | * Clean up .... | |
574 | */ | |
575 | ||
576 | libusb_free_device_list(list, 1); | |
577 | libusb_exit(NULL); | |
578 | ||
579 | return (status); | |
75bd9771 MS |
580 | } |
581 | ||
582 | ||
583 | /* | |
584 | * 'close_device()' - Close the connection to the USB printer. | |
585 | */ | |
586 | ||
587 | static int /* I - 0 on success, -1 on failure */ | |
588 | close_device(usb_printer_t *printer) /* I - Printer */ | |
589 | { | |
12f89d24 MS |
590 | struct libusb_device_descriptor devdesc; |
591 | /* Current device descriptor */ | |
592 | struct libusb_config_descriptor *confptr; | |
593 | /* Pointer to current configuration */ | |
594 | ||
595 | ||
75bd9771 MS |
596 | if (printer->handle) |
597 | { | |
557dde9f MS |
598 | /* |
599 | * Release interfaces before closing so that we know all data is written | |
600 | * to the device... | |
601 | */ | |
602 | ||
12f89d24 | 603 | int number; /* Interface number */ |
557dde9f | 604 | |
12f89d24 MS |
605 | libusb_get_device_descriptor (printer->device, &devdesc); |
606 | libusb_get_config_descriptor (printer->device, printer->conf, &confptr); | |
607 | number = confptr->interface[printer->iface]. | |
608 | altsetting[printer->altset].bInterfaceNumber; | |
609 | libusb_release_interface(printer->handle, number); | |
557dde9f | 610 | if (number != 0) |
12f89d24 MS |
611 | libusb_release_interface(printer->handle, 0); |
612 | ||
613 | /* | |
614 | * Re-attach "usblp" kernel module if it was attached before using this | |
615 | * device | |
616 | */ | |
617 | ||
618 | if (printer->usblp_attached == 1) | |
619 | { | |
620 | if (libusb_attach_kernel_driver(printer->handle, printer->iface) < 0) | |
621 | fprintf(stderr, | |
622 | "DEBUG: Failed to re-attach \"usblp\" kernel module to " | |
623 | "%04x:%04x\n", devdesc.idVendor, devdesc.idProduct); | |
624 | } | |
625 | ||
626 | libusb_free_config_descriptor(confptr); | |
557dde9f MS |
627 | |
628 | /* | |
629 | * Close the interface and return... | |
630 | */ | |
631 | ||
12f89d24 | 632 | libusb_close(printer->handle); |
75bd9771 MS |
633 | printer->handle = NULL; |
634 | } | |
635 | ||
636 | return (0); | |
637 | } | |
638 | ||
639 | ||
640 | /* | |
641 | * 'find_device()' - Find or enumerate USB printers. | |
642 | */ | |
643 | ||
644 | static usb_printer_t * /* O - Found printer */ | |
645 | find_device(usb_cb_t cb, /* I - Callback function */ | |
646 | const void *data) /* I - User data for callback */ | |
647 | { | |
12f89d24 MS |
648 | libusb_device **list; /* List of connected USB devices */ |
649 | libusb_device *device = NULL; /* Current device */ | |
650 | struct libusb_device_descriptor devdesc; | |
651 | /* Current device descriptor */ | |
652 | struct libusb_config_descriptor *confptr = NULL; | |
653 | /* Pointer to current configuration */ | |
654 | const struct libusb_interface *ifaceptr = NULL; | |
655 | /* Pointer to current interface */ | |
656 | const struct libusb_interface_descriptor *altptr = NULL; | |
75bd9771 | 657 | /* Pointer to current alternate setting */ |
12f89d24 | 658 | const struct libusb_endpoint_descriptor *endpptr = NULL; |
75bd9771 | 659 | /* Pointer to current endpoint */ |
12f89d24 MS |
660 | ssize_t numdevs, /* number of connected devices */ |
661 | i = 0; | |
662 | uint8_t conf, /* Current configuration */ | |
75bd9771 MS |
663 | iface, /* Current interface */ |
664 | altset, /* Current alternate setting */ | |
665 | protocol, /* Current protocol */ | |
666 | endp, /* Current endpoint */ | |
667 | read_endp, /* Current read endpoint */ | |
668 | write_endp; /* Current write endpoint */ | |
669 | char device_id[1024],/* IEEE-1284 device ID */ | |
670 | device_uri[1024]; | |
671 | /* Device URI */ | |
672 | static usb_printer_t printer; /* Current printer */ | |
673 | ||
674 | ||
675 | /* | |
676 | * Initialize libusb... | |
677 | */ | |
678 | ||
12f89d24 MS |
679 | libusb_init(NULL); |
680 | numdevs = libusb_get_device_list(NULL, &list); | |
681 | fprintf(stderr, "DEBUG: libusb_get_device_list=%d\n", (int)numdevs); | |
75bd9771 MS |
682 | |
683 | /* | |
684 | * Then loop through the devices it found... | |
685 | */ | |
686 | ||
12f89d24 MS |
687 | if (numdevs > 0) |
688 | for (i = 0; i < numdevs; i++) | |
75bd9771 | 689 | { |
12f89d24 MS |
690 | device = list[i]; |
691 | ||
75bd9771 MS |
692 | /* |
693 | * Ignore devices with no configuration data and anything that is not | |
694 | * a printer... | |
695 | */ | |
696 | ||
12f89d24 MS |
697 | libusb_get_device_descriptor (device, &devdesc); |
698 | ||
699 | if (!devdesc.bNumConfigurations || !devdesc.idVendor || | |
700 | !devdesc.idProduct) | |
75bd9771 MS |
701 | continue; |
702 | ||
12f89d24 MS |
703 | for (conf = 0; conf < devdesc.bNumConfigurations; conf ++) |
704 | { | |
705 | if (libusb_get_config_descriptor (device, conf, &confptr) < 0) | |
706 | continue; | |
75bd9771 MS |
707 | for (iface = 0, ifaceptr = confptr->interface; |
708 | iface < confptr->bNumInterfaces; | |
709 | iface ++, ifaceptr ++) | |
710 | { | |
711 | /* | |
712 | * Some printers offer multiple interfaces... | |
713 | */ | |
714 | ||
715 | protocol = 0; | |
716 | ||
717 | for (altset = 0, altptr = ifaceptr->altsetting; | |
718 | altset < ifaceptr->num_altsetting; | |
719 | altset ++, altptr ++) | |
720 | { | |
721 | /* | |
722 | * Currently we only support unidirectional and bidirectional | |
723 | * printers. Future versions of this code will support the | |
724 | * 1284.4 (packet mode) protocol as well. | |
725 | */ | |
726 | ||
12f89d24 | 727 | if (altptr->bInterfaceClass != LIBUSB_CLASS_PRINTER || |
75bd9771 MS |
728 | altptr->bInterfaceSubClass != 1 || |
729 | (altptr->bInterfaceProtocol != 1 && /* Unidirectional */ | |
730 | altptr->bInterfaceProtocol != 2) || /* Bidirectional */ | |
731 | altptr->bInterfaceProtocol < protocol) | |
732 | continue; | |
733 | ||
734 | read_endp = -1; | |
735 | write_endp = -1; | |
736 | ||
737 | for (endp = 0, endpptr = altptr->endpoint; | |
738 | endp < altptr->bNumEndpoints; | |
739 | endp ++, endpptr ++) | |
12f89d24 MS |
740 | if ((endpptr->bmAttributes & LIBUSB_TRANSFER_TYPE_MASK) == |
741 | LIBUSB_TRANSFER_TYPE_BULK) | |
75bd9771 | 742 | { |
12f89d24 | 743 | if (endpptr->bEndpointAddress & LIBUSB_ENDPOINT_DIR_MASK) |
75bd9771 MS |
744 | read_endp = endp; |
745 | else | |
746 | write_endp = endp; | |
747 | } | |
748 | ||
749 | if (write_endp >= 0) | |
750 | { | |
751 | /* | |
752 | * Save the best match so far... | |
753 | */ | |
754 | ||
755 | protocol = altptr->bInterfaceProtocol; | |
756 | printer.altset = altset; | |
757 | printer.write_endp = write_endp; | |
758 | printer.read_endp = read_endp; | |
759 | } | |
760 | } | |
761 | ||
762 | if (protocol > 0) | |
763 | { | |
12f89d24 MS |
764 | printer.device = device; |
765 | printer.conf = conf; | |
766 | printer.iface = iface; | |
767 | printer.protocol = protocol; | |
768 | printer.handle = NULL; | |
75bd9771 MS |
769 | |
770 | if (!open_device(&printer, data != NULL)) | |
771 | { | |
12f89d24 MS |
772 | get_device_id(&printer, device_id, sizeof(device_id)); |
773 | make_device_uri(&printer, device_id, device_uri, | |
774 | sizeof(device_uri)); | |
75bd9771 | 775 | |
12f89d24 MS |
776 | if ((*cb)(&printer, device_uri, device_id, data)) |
777 | { | |
778 | printer.read_endp = confptr->interface[printer.iface]. | |
005dd1eb MS |
779 | altsetting[printer.altset]. |
780 | endpoint[printer.read_endp]. | |
781 | bEndpointAddress; | |
12f89d24 | 782 | printer.write_endp = confptr->interface[printer.iface]. |
005dd1eb MS |
783 | altsetting[printer.altset]. |
784 | endpoint[printer.write_endp]. | |
785 | bEndpointAddress; | |
12f89d24 | 786 | return (&printer); |
75bd9771 MS |
787 | } |
788 | ||
789 | close_device(&printer); | |
790 | } | |
791 | } | |
792 | } | |
12f89d24 MS |
793 | libusb_free_config_descriptor(confptr); |
794 | } | |
75bd9771 MS |
795 | } |
796 | ||
797 | /* | |
798 | * If we get this far without returning, then we haven't found a printer | |
799 | * to print to... | |
800 | */ | |
801 | ||
12f89d24 MS |
802 | /* |
803 | * Clean up .... | |
804 | */ | |
805 | ||
806 | libusb_free_device_list(list, 1); | |
807 | libusb_exit(NULL); | |
808 | ||
75bd9771 MS |
809 | return (NULL); |
810 | } | |
811 | ||
812 | ||
813 | /* | |
814 | * 'get_device_id()' - Get the IEEE-1284 device ID for the printer. | |
815 | */ | |
816 | ||
817 | static int /* O - 0 on success, -1 on error */ | |
818 | get_device_id(usb_printer_t *printer, /* I - Printer */ | |
819 | char *buffer, /* I - String buffer */ | |
820 | size_t bufsize) /* I - Number of bytes in buffer */ | |
821 | { | |
822 | int length; /* Length of device ID */ | |
823 | ||
824 | ||
12f89d24 MS |
825 | if (libusb_control_transfer(printer->handle, |
826 | LIBUSB_REQUEST_TYPE_CLASS | LIBUSB_ENDPOINT_IN | | |
827 | LIBUSB_RECIPIENT_INTERFACE, | |
828 | 0, printer->conf, | |
829 | (printer->iface << 8) | printer->altset, | |
830 | (unsigned char *)buffer, bufsize, 5000) < 0) | |
75bd9771 MS |
831 | { |
832 | *buffer = '\0'; | |
833 | return (-1); | |
834 | } | |
835 | ||
836 | /* | |
837 | * Extract the length of the device ID string from the first two | |
838 | * bytes. The 1284 spec says the length is stored MSB first... | |
839 | */ | |
840 | ||
12f89d24 | 841 | length = (((unsigned)buffer[0] & 255) << 8) | |
75bd9771 MS |
842 | ((unsigned)buffer[1] & 255); |
843 | ||
844 | /* | |
12f89d24 MS |
845 | * Check to see if the length is larger than our buffer or less than 14 bytes |
846 | * (the minimum valid device ID is "MFG:x;MDL:y;" with 2 bytes for the length). | |
847 | * | |
848 | * If the length is out-of-range, assume that the vendor incorrectly | |
849 | * implemented the 1284 spec and re-read the length as LSB first,.. | |
75bd9771 MS |
850 | */ |
851 | ||
12f89d24 MS |
852 | if (length > bufsize || length < 14) |
853 | length = (((unsigned)buffer[1] & 255) << 8) | | |
75bd9771 MS |
854 | ((unsigned)buffer[0] & 255); |
855 | ||
ee6ddad2 MS |
856 | if (length > bufsize) |
857 | length = bufsize; | |
858 | ||
12f89d24 MS |
859 | if (length < 14) |
860 | { | |
861 | /* | |
862 | * Invalid device ID, clear it! | |
863 | */ | |
864 | ||
865 | *buffer = '\0'; | |
866 | return (-1); | |
867 | } | |
868 | ||
ee6ddad2 | 869 | length -= 2; |
75bd9771 MS |
870 | |
871 | /* | |
872 | * Copy the device ID text to the beginning of the buffer and | |
873 | * nul-terminate. | |
874 | */ | |
875 | ||
876 | memmove(buffer, buffer + 2, length); | |
877 | buffer[length] = '\0'; | |
878 | ||
879 | return (0); | |
880 | } | |
881 | ||
882 | ||
883 | /* | |
884 | * 'list_cb()' - List USB printers for discovery. | |
885 | */ | |
886 | ||
887 | static int /* O - 0 to continue, 1 to stop */ | |
888 | list_cb(usb_printer_t *printer, /* I - Printer */ | |
889 | const char *device_uri, /* I - Device URI */ | |
890 | const char *device_id, /* I - IEEE-1284 device ID */ | |
891 | const void *data) /* I - User data (not used) */ | |
892 | { | |
893 | char make_model[1024]; /* Make and model */ | |
894 | ||
895 | ||
896 | /* | |
897 | * Get the device URI and make/model strings... | |
898 | */ | |
899 | ||
12f89d24 MS |
900 | if (backendGetMakeModel(device_id, make_model, sizeof(make_model))) |
901 | strlcpy(make_model, "Unknown", sizeof(make_model)); | |
75bd9771 MS |
902 | |
903 | /* | |
904 | * Report the printer... | |
905 | */ | |
906 | ||
749b1e90 MS |
907 | cupsBackendReport("direct", device_uri, make_model, make_model, device_id, |
908 | NULL); | |
75bd9771 MS |
909 | |
910 | /* | |
911 | * Keep going... | |
912 | */ | |
913 | ||
914 | return (0); | |
915 | } | |
916 | ||
917 | ||
918 | /* | |
919 | * 'make_device_uri()' - Create a device URI for a USB printer. | |
920 | */ | |
921 | ||
922 | static char * /* O - Device URI */ | |
923 | make_device_uri( | |
924 | usb_printer_t *printer, /* I - Printer */ | |
925 | const char *device_id, /* I - IEEE-1284 device ID */ | |
926 | char *uri, /* I - Device URI buffer */ | |
927 | size_t uri_size) /* I - Size of device URI buffer */ | |
928 | { | |
12f89d24 MS |
929 | struct libusb_device_descriptor devdesc; |
930 | /* Current device descriptor */ | |
75bd9771 MS |
931 | char options[1024]; /* Device URI options */ |
932 | int num_values; /* Number of 1284 parameters */ | |
933 | cups_option_t *values; /* 1284 parameters */ | |
934 | const char *mfg, /* Manufacturer */ | |
935 | *mdl, /* Model */ | |
12f89d24 | 936 | *des = NULL, /* Description */ |
75bd9771 | 937 | *sern; /* Serial number */ |
f99f3698 | 938 | size_t mfglen; /* Length of manufacturer string */ |
75bd9771 MS |
939 | char tempmfg[256], /* Temporary manufacturer string */ |
940 | tempsern[256], /* Temporary serial number string */ | |
941 | *tempptr; /* Pointer into temp string */ | |
942 | ||
943 | ||
944 | /* | |
945 | * Get the make, model, and serial numbers... | |
946 | */ | |
947 | ||
f8b3a85b | 948 | num_values = _cupsGet1284Values(device_id, &values); |
75bd9771 MS |
949 | |
950 | if ((sern = cupsGetOption("SERIALNUMBER", num_values, values)) == NULL) | |
951 | if ((sern = cupsGetOption("SERN", num_values, values)) == NULL) | |
7cf5915e | 952 | if ((sern = cupsGetOption("SN", num_values, values)) == NULL && |
12f89d24 MS |
953 | ((libusb_get_device_descriptor (printer->device, &devdesc) >= 0) && |
954 | devdesc.iSerialNumber)) | |
75bd9771 MS |
955 | { |
956 | /* | |
957 | * Try getting the serial number from the device itself... | |
958 | */ | |
959 | ||
12f89d24 MS |
960 | int length = |
961 | libusb_get_string_descriptor_ascii(printer->handle, | |
962 | devdesc.iSerialNumber, | |
963 | (unsigned char *)tempsern, | |
964 | sizeof(tempsern) - 1); | |
75bd9771 MS |
965 | if (length > 0) |
966 | { | |
967 | tempsern[length] = '\0'; | |
968 | sern = tempsern; | |
969 | } | |
970 | } | |
971 | ||
972 | if ((mfg = cupsGetOption("MANUFACTURER", num_values, values)) == NULL) | |
973 | mfg = cupsGetOption("MFG", num_values, values); | |
974 | ||
975 | if ((mdl = cupsGetOption("MODEL", num_values, values)) == NULL) | |
976 | mdl = cupsGetOption("MDL", num_values, values); | |
977 | ||
75bd9771 MS |
978 | /* |
979 | * To maintain compatibility with the original character device backend on | |
980 | * Linux and *BSD, map manufacturer names... | |
981 | */ | |
982 | ||
983 | if (mfg) | |
984 | { | |
88f9aafc | 985 | if (!_cups_strcasecmp(mfg, "Hewlett-Packard")) |
75bd9771 | 986 | mfg = "HP"; |
88f9aafc | 987 | else if (!_cups_strcasecmp(mfg, "Lexmark International")) |
75bd9771 MS |
988 | mfg = "Lexmark"; |
989 | } | |
990 | else | |
75bd9771 MS |
991 | { |
992 | /* | |
993 | * No manufacturer? Use the model string or description... | |
994 | */ | |
995 | ||
996 | if (mdl) | |
997 | _ppdNormalizeMakeAndModel(mdl, tempmfg, sizeof(tempmfg)); | |
998 | else if ((des = cupsGetOption("DESCRIPTION", num_values, values)) != NULL || | |
999 | (des = cupsGetOption("DES", num_values, values)) != NULL) | |
1000 | _ppdNormalizeMakeAndModel(des, tempmfg, sizeof(tempmfg)); | |
1001 | else | |
1002 | strlcpy(tempmfg, "Unknown", sizeof(tempmfg)); | |
1003 | ||
1004 | if ((tempptr = strchr(tempmfg, ' ')) != NULL) | |
1005 | *tempptr = '\0'; | |
1006 | ||
1007 | mfg = tempmfg; | |
1008 | } | |
1009 | ||
12f89d24 MS |
1010 | if (!mdl) |
1011 | { | |
1012 | /* | |
1013 | * No model? Use description... | |
1014 | */ | |
1015 | if (des) | |
1016 | mdl = des; /* We remove the manufacturer name below */ | |
1017 | else if (!strncasecmp(mfg, "Unknown", 7)) | |
1018 | mdl = "Printer"; | |
1019 | else | |
1020 | mdl = "Unknown Model"; | |
1021 | } | |
1022 | ||
f99f3698 MS |
1023 | mfglen = strlen(mfg); |
1024 | ||
1025 | if (!strncasecmp(mdl, mfg, mfglen) && _cups_isspace(mdl[mfglen])) | |
1026 | { | |
1027 | mdl += mfglen + 1; | |
1028 | ||
1029 | while (_cups_isspace(*mdl)) | |
1030 | mdl ++; | |
1031 | } | |
1032 | ||
75bd9771 MS |
1033 | /* |
1034 | * Generate the device URI from the manufacturer, model, serial number, | |
1035 | * and interface number... | |
1036 | */ | |
1037 | ||
1038 | if (sern) | |
1039 | { | |
1040 | if (printer->iface > 0) | |
1041 | snprintf(options, sizeof(options), "?serial=%s&interface=%d", sern, | |
1042 | printer->iface); | |
1043 | else | |
1044 | snprintf(options, sizeof(options), "?serial=%s", sern); | |
1045 | } | |
1046 | else if (printer->iface > 0) | |
1047 | snprintf(options, sizeof(options), "?interface=%d", printer->iface); | |
1048 | else | |
1049 | options[0] = '\0'; | |
1050 | ||
1051 | httpAssembleURIf(HTTP_URI_CODING_ALL, uri, uri_size, "usb", NULL, mfg, 0, | |
1052 | "/%s%s", mdl, options); | |
1053 | ||
1054 | cupsFreeOptions(num_values, values); | |
1055 | ||
1056 | return (uri); | |
1057 | } | |
1058 | ||
1059 | ||
1060 | /* | |
1061 | * 'open_device()' - Open a connection to the USB printer. | |
1062 | */ | |
1063 | ||
1064 | static int /* O - 0 on success, -1 on error */ | |
1065 | open_device(usb_printer_t *printer, /* I - Printer */ | |
1066 | int verbose) /* I - Update connecting-to-device state? */ | |
1067 | { | |
12f89d24 MS |
1068 | struct libusb_device_descriptor devdesc; |
1069 | /* Current device descriptor */ | |
1070 | struct libusb_config_descriptor *confptr = NULL; | |
1071 | /* Pointer to current configuration */ | |
1072 | int number1 = -1, /* Configuration/interface/altset */ | |
1073 | number2 = -1, /* numbers */ | |
1074 | errcode = 0; | |
1075 | char current; /* Current configuration */ | |
75bd9771 MS |
1076 | |
1077 | ||
1078 | /* | |
1079 | * Return immediately if we are already connected... | |
1080 | */ | |
1081 | ||
1082 | if (printer->handle) | |
1083 | return (0); | |
1084 | ||
1085 | /* | |
1086 | * Try opening the printer... | |
1087 | */ | |
1088 | ||
12f89d24 | 1089 | if (libusb_open(printer->device, &printer->handle) < 0) |
75bd9771 MS |
1090 | return (-1); |
1091 | ||
12f89d24 MS |
1092 | if (verbose) |
1093 | fputs("STATE: +connecting-to-device\n", stderr); | |
1094 | ||
75bd9771 | 1095 | /* |
12f89d24 MS |
1096 | * Set the desired configuration, but only if it needs changing. Some |
1097 | * printers (e.g., Samsung) don't like libusb_set_configuration. It will | |
1098 | * succeed, but the following print job is sometimes silently lost by the | |
1099 | * printer. | |
75bd9771 MS |
1100 | */ |
1101 | ||
12f89d24 MS |
1102 | if (libusb_control_transfer(printer->handle, |
1103 | LIBUSB_REQUEST_TYPE_STANDARD | LIBUSB_ENDPOINT_IN | | |
1104 | LIBUSB_RECIPIENT_DEVICE, | |
1105 | 8, /* GET_CONFIGURATION */ | |
1106 | 0, 0, (unsigned char *)¤t, 1, 5000) < 0) | |
1107 | current = 0; /* Assume not configured */ | |
75bd9771 | 1108 | |
12f89d24 MS |
1109 | libusb_get_device_descriptor (printer->device, &devdesc); |
1110 | libusb_get_config_descriptor (printer->device, printer->conf, &confptr); | |
1111 | number1 = confptr->bConfigurationValue; | |
e4572d57 | 1112 | |
12f89d24 | 1113 | if (number1 != current) |
75bd9771 | 1114 | { |
12f89d24 MS |
1115 | if ((errcode = libusb_set_configuration(printer->handle, number1)) < 0) |
1116 | { | |
1117 | /* | |
1118 | * If the set fails, chances are that the printer only supports a | |
1119 | * single configuration. Technically these printers don't conform to | |
1120 | * the USB printer specification, but otherwise they'll work... | |
1121 | */ | |
e4572d57 | 1122 | |
12f89d24 MS |
1123 | if (errcode != LIBUSB_ERROR_BUSY) |
1124 | fprintf(stderr, "DEBUG: Failed to set configuration %d for %04x:%04x\n", | |
1125 | number1, devdesc.idVendor, devdesc.idProduct); | |
1126 | } | |
75bd9771 MS |
1127 | } |
1128 | ||
1129 | /* | |
12f89d24 MS |
1130 | * Get the "usblp" kernel module out of the way. This backend only |
1131 | * works without the module attached. | |
75bd9771 MS |
1132 | */ |
1133 | ||
12f89d24 MS |
1134 | errcode = libusb_kernel_driver_active(printer->handle, printer->iface); |
1135 | if (errcode == 0) | |
1136 | printer->usblp_attached = 0; | |
1137 | else if (errcode == 1) | |
75bd9771 | 1138 | { |
12f89d24 MS |
1139 | printer->usblp_attached = 1; |
1140 | if ((errcode = | |
1141 | libusb_detach_kernel_driver(printer->handle, printer->iface)) < 0) | |
75bd9771 | 1142 | { |
12f89d24 MS |
1143 | fprintf(stderr, "DEBUG: Failed to detach \"usblp\" module from %04x:%04x\n", |
1144 | devdesc.idVendor, devdesc.idProduct); | |
75bd9771 MS |
1145 | goto error; |
1146 | } | |
12f89d24 MS |
1147 | } |
1148 | else | |
1149 | { | |
1150 | printer->usblp_attached = 0; | |
1151 | fprintf(stderr, "DEBUG: Failed to check whether %04x:%04x has the \"usblp\" kernel module attached\n", | |
1152 | devdesc.idVendor, devdesc.idProduct); | |
1153 | goto error; | |
1154 | } | |
75bd9771 MS |
1155 | |
1156 | /* | |
12f89d24 | 1157 | * Claim interfaces as needed... |
75bd9771 MS |
1158 | */ |
1159 | ||
12f89d24 MS |
1160 | number1 = confptr->interface[printer->iface]. |
1161 | altsetting[printer->altset].bInterfaceNumber; | |
1162 | ||
1163 | while ((errcode = libusb_claim_interface(printer->handle, number1)) < 0) | |
75bd9771 | 1164 | { |
12f89d24 | 1165 | if (errcode != LIBUSB_ERROR_BUSY) |
75bd9771 | 1166 | fprintf(stderr, |
12f89d24 MS |
1167 | "DEBUG: Failed to claim interface %d for %04x:%04x: %s\n", |
1168 | number1, devdesc.idVendor, devdesc.idProduct, strerror(errno)); | |
75bd9771 MS |
1169 | |
1170 | goto error; | |
1171 | } | |
1172 | ||
12f89d24 MS |
1173 | /* |
1174 | * Set alternate setting, but only if there is more than one option. Some | |
1175 | * printers (e.g., Samsung) don't like usb_set_altinterface. | |
1176 | */ | |
1177 | ||
1178 | if (confptr->interface[printer->iface].num_altsetting > 1) | |
1179 | { | |
1180 | number1 = confptr->interface[printer->iface]. | |
1181 | altsetting[printer->altset].bInterfaceNumber; | |
1182 | number2 = confptr->interface[printer->iface]. | |
1183 | altsetting[printer->altset].bAlternateSetting; | |
1184 | ||
1185 | while ((errcode = | |
1186 | libusb_set_interface_alt_setting(printer->handle, number1, number2)) | |
1187 | < 0) | |
1188 | { | |
1189 | if (errcode != LIBUSB_ERROR_BUSY) | |
1190 | fprintf(stderr, | |
1191 | "DEBUG: Failed to set alternate interface %d for %04x:%04x: " | |
1192 | "%s\n", | |
1193 | number2, devdesc.idVendor, devdesc.idProduct, strerror(errno)); | |
1194 | ||
1195 | goto error; | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | libusb_free_config_descriptor(confptr); | |
1200 | ||
75bd9771 MS |
1201 | if (verbose) |
1202 | fputs("STATE: -connecting-to-device\n", stderr); | |
1203 | ||
1204 | return (0); | |
1205 | ||
1206 | /* | |
1207 | * If we get here, there was a hard error... | |
1208 | */ | |
1209 | ||
1210 | error: | |
1211 | ||
1212 | if (verbose) | |
1213 | fputs("STATE: -connecting-to-device\n", stderr); | |
1214 | ||
12f89d24 | 1215 | libusb_close(printer->handle); |
75bd9771 MS |
1216 | printer->handle = NULL; |
1217 | ||
1218 | return (-1); | |
1219 | } | |
1220 | ||
1221 | ||
1222 | /* | |
1223 | * 'print_cb()' - Find a USB printer for printing. | |
1224 | */ | |
1225 | ||
1226 | static int /* O - 0 to continue, 1 to stop (found) */ | |
1227 | print_cb(usb_printer_t *printer, /* I - Printer */ | |
1228 | const char *device_uri, /* I - Device URI */ | |
1229 | const char *device_id, /* I - IEEE-1284 device ID */ | |
1230 | const void *data) /* I - User data (make, model, S/N) */ | |
1231 | { | |
f99f3698 MS |
1232 | char requested_uri[1024], /* Requested URI */ |
1233 | *requested_ptr, /* Pointer into requested URI */ | |
1234 | detected_uri[1024], /* Detected URI */ | |
1235 | *detected_ptr; /* Pointer into detected URI */ | |
1236 | ||
1237 | ||
1238 | /* | |
1239 | * If we have an exact match, stop now... | |
1240 | */ | |
1241 | ||
1242 | if (!strcmp((char *)data, device_uri)) | |
1243 | return (1); | |
1244 | ||
1245 | /* | |
1246 | * Work on copies of the URIs... | |
1247 | */ | |
1248 | ||
1249 | strlcpy(requested_uri, (char *)data, sizeof(requested_uri)); | |
1250 | strlcpy(detected_uri, device_uri, sizeof(detected_uri)); | |
1251 | ||
1252 | /* | |
1253 | * libusb-discovered URIs can have an "interface" specification and this | |
1254 | * never happens for usblp-discovered URIs, so remove the "interface" | |
1255 | * specification from the URI which we are checking currently. This way a | |
1256 | * queue for a usblp-discovered printer can now be accessed via libusb. | |
1257 | * | |
1258 | * Similarly, strip "?serial=NNN...NNN" as needed. | |
1259 | */ | |
1260 | ||
1261 | if ((requested_ptr = strstr(requested_uri, "?interface=")) == NULL) | |
1262 | requested_ptr = strstr(requested_uri, "&interface="); | |
1263 | if ((detected_ptr = strstr(detected_uri, "?interface=")) == NULL) | |
1264 | detected_ptr = strstr(detected_uri, "&interface="); | |
1265 | ||
1266 | if (!requested_ptr && detected_ptr) | |
1267 | { | |
1268 | /* | |
1269 | * Strip "[?&]interface=nnn" from the detected printer. | |
1270 | */ | |
1271 | ||
1272 | *detected_ptr = '\0'; | |
1273 | } | |
1274 | else if (requested_ptr && !detected_ptr) | |
1275 | { | |
1276 | /* | |
1277 | * Strip "[?&]interface=nnn" from the requested printer. | |
1278 | */ | |
1279 | ||
1280 | *requested_ptr = '\0'; | |
1281 | } | |
1282 | ||
1283 | if ((requested_ptr = strstr(requested_uri, "?serial=?")) != NULL) | |
1284 | { | |
1285 | /* | |
1286 | * Strip "?serial=?" from the requested printer. This is a special | |
1287 | * case, as "?serial=?" means no serial number and not the serial | |
1288 | * number '?'. This is not covered by the checks below... | |
1289 | */ | |
1290 | ||
1291 | *requested_ptr = '\0'; | |
1292 | } | |
1293 | ||
1294 | if ((requested_ptr = strstr(requested_uri, "?serial=")) == NULL && | |
1295 | (detected_ptr = strstr(detected_uri, "?serial=")) != NULL) | |
1296 | { | |
1297 | /* | |
1298 | * Strip "?serial=nnn" from the detected printer. | |
1299 | */ | |
1300 | ||
1301 | *detected_ptr = '\0'; | |
1302 | } | |
1303 | else if (requested_ptr && !detected_ptr) | |
1304 | { | |
1305 | /* | |
1306 | * Strip "?serial=nnn" from the requested printer. | |
1307 | */ | |
1308 | ||
1309 | *requested_ptr = '\0'; | |
1310 | } | |
1311 | ||
1312 | return (!strcmp(requested_uri, detected_uri)); | |
75bd9771 MS |
1313 | } |
1314 | ||
1315 | ||
005dd1eb | 1316 | /* |
12f89d24 | 1317 | * 'read_thread()' - Thread to read the backchannel data on. |
005dd1eb MS |
1318 | */ |
1319 | ||
12f89d24 MS |
1320 | static void *read_thread(void *reference) |
1321 | { | |
1322 | unsigned char readbuffer[512]; | |
1323 | int rbytes; | |
1324 | int readstatus; | |
1325 | struct timeval now, | |
1326 | delay, | |
1327 | end, | |
1328 | timeleft; | |
1329 | ||
1330 | ||
1331 | (void)reference; | |
1332 | ||
1333 | /* | |
1334 | * Read frequency: once every 250 milliseconds. | |
1335 | */ | |
1336 | ||
1337 | delay.tv_sec = 0; | |
1338 | delay.tv_usec = 250000; | |
1339 | ||
1340 | do | |
1341 | { | |
1342 | /* | |
1343 | * Remember when we started so we can throttle the loop after the read | |
1344 | * call... | |
1345 | */ | |
1346 | ||
1347 | gettimeofday(&now, NULL); | |
1348 | ||
1349 | /* | |
1350 | * Calculate what 250 milliSeconds are in absolute time... | |
1351 | */ | |
1352 | ||
1353 | timeradd(&now, &delay, &end); | |
1354 | ||
1355 | rbytes = sizeof(readbuffer); | |
1356 | readstatus = libusb_bulk_transfer(g.printer->handle, | |
1357 | g.printer->read_endp, | |
1358 | readbuffer, rbytes, | |
1359 | &rbytes, 60000); | |
1360 | if (readstatus == LIBUSB_SUCCESS && rbytes > 0) | |
1361 | { | |
1362 | fprintf(stderr, "DEBUG: Read %d bytes of back-channel data...\n", | |
1363 | (int)rbytes); | |
1364 | cupsBackChannelWrite((const char *)readbuffer, rbytes, 1.0); | |
1365 | } | |
1366 | else if (readstatus == LIBUSB_ERROR_TIMEOUT) | |
1367 | fputs("DEBUG: Got USB transaction timeout during read.\n", stderr); | |
1368 | else if (readstatus == LIBUSB_ERROR_PIPE) | |
1369 | fputs("DEBUG: Got USB pipe stalled during read.\n", stderr); | |
1370 | else if (readstatus == LIBUSB_ERROR_INTERRUPTED) | |
1371 | fputs("DEBUG: Got USB return aborted during read.\n", stderr); | |
1372 | ||
1373 | /* | |
1374 | * Make sure this loop executes no more than once every 250 miliseconds... | |
1375 | */ | |
1376 | ||
1377 | if ((readstatus != LIBUSB_SUCCESS || rbytes == 0) && | |
1378 | (g.wait_eof || !g.read_thread_stop)) | |
1379 | { | |
1380 | gettimeofday(&now, NULL); | |
1381 | if (timercmp(&now, &end, <)) | |
1382 | { | |
1383 | timersub(&end, &now, &timeleft); | |
1384 | usleep(1000000 * timeleft.tv_sec + timeleft.tv_usec); | |
1385 | } | |
1386 | } | |
1387 | } while (g.wait_eof || !g.read_thread_stop); | |
1388 | ||
1389 | /* | |
1390 | * Let the main thread know that we have completed the read thread... | |
1391 | */ | |
1392 | ||
1393 | pthread_mutex_lock(&g.read_thread_mutex); | |
1394 | g.read_thread_done = 1; | |
1395 | pthread_cond_signal(&g.read_thread_cond); | |
1396 | pthread_mutex_unlock(&g.read_thread_mutex); | |
1397 | ||
1398 | return (NULL); | |
1399 | } | |
1400 | ||
1401 | ||
1402 | /* | |
1403 | * 'sidechannel_thread()' - Handle side-channel requests. | |
1404 | */ | |
1405 | ||
1406 | static void* | |
1407 | sidechannel_thread(void *reference) | |
005dd1eb | 1408 | { |
005dd1eb MS |
1409 | cups_sc_command_t command; /* Request command */ |
1410 | cups_sc_status_t status; /* Request/response status */ | |
1411 | char data[2048]; /* Request/response data */ | |
1412 | int datalen; /* Request/response data size */ | |
1413 | ||
1414 | ||
12f89d24 | 1415 | (void)reference; |
005dd1eb | 1416 | |
12f89d24 | 1417 | do |
005dd1eb | 1418 | { |
12f89d24 | 1419 | datalen = sizeof(data); |
005dd1eb | 1420 | |
12f89d24 MS |
1421 | if (cupsSideChannelRead(&command, &status, data, &datalen, 1.0)) |
1422 | { | |
1423 | if (status == CUPS_SC_STATUS_TIMEOUT) | |
1424 | continue; | |
1425 | else | |
1426 | break; | |
1427 | } | |
1428 | ||
1429 | switch (command) | |
1430 | { | |
1431 | case CUPS_SC_CMD_SOFT_RESET: /* Do a soft reset */ | |
1432 | fputs("DEBUG: CUPS_SC_CMD_SOFT_RESET received from driver...\n", | |
1433 | stderr); | |
1434 | ||
1435 | soft_reset(); | |
1436 | cupsSideChannelWrite(command, CUPS_SC_STATUS_OK, NULL, 0, 1.0); | |
1437 | fputs("DEBUG: Returning status CUPS_STATUS_OK with no bytes...\n", | |
1438 | stderr); | |
1439 | break; | |
1440 | ||
1441 | case CUPS_SC_CMD_DRAIN_OUTPUT: /* Drain all pending output */ | |
1442 | fputs("DEBUG: CUPS_SC_CMD_DRAIN_OUTPUT received from driver...\n", | |
1443 | stderr); | |
1444 | ||
1445 | g.drain_output = 1; | |
1446 | break; | |
1447 | ||
1448 | case CUPS_SC_CMD_GET_BIDI: /* Is the connection bidirectional? */ | |
1449 | fputs("DEBUG: CUPS_SC_CMD_GET_BIDI received from driver...\n", | |
1450 | stderr); | |
1451 | ||
1452 | data[0] = (g.printer->protocol >= 2 ? 1 : 0); | |
1453 | cupsSideChannelWrite(command, CUPS_SC_STATUS_OK, data, 1, 1.0); | |
1454 | ||
1455 | fprintf(stderr, | |
1456 | "DEBUG: Returned CUPS_SC_STATUS_OK with 1 byte (%02X)...\n", | |
1457 | data[0]); | |
1458 | break; | |
1459 | ||
1460 | case CUPS_SC_CMD_GET_DEVICE_ID: /* Return IEEE-1284 device ID */ | |
1461 | fputs("DEBUG: CUPS_SC_CMD_GET_DEVICE_ID received from driver...\n", | |
1462 | stderr); | |
005dd1eb | 1463 | |
12f89d24 MS |
1464 | datalen = sizeof(data); |
1465 | if (get_device_id(g.printer, data, sizeof(data))) | |
1466 | { | |
1467 | status = CUPS_SC_STATUS_IO_ERROR; | |
1468 | datalen = 0; | |
005dd1eb | 1469 | } |
12f89d24 MS |
1470 | else |
1471 | { | |
1472 | status = CUPS_SC_STATUS_OK; | |
1473 | datalen = strlen(data); | |
1474 | } | |
1475 | cupsSideChannelWrite(command, CUPS_SC_STATUS_OK, data, datalen, 1.0); | |
005dd1eb | 1476 | |
12f89d24 MS |
1477 | if (datalen < sizeof(data)) |
1478 | data[datalen] = '\0'; | |
1479 | else | |
1480 | data[sizeof(data) - 1] = '\0'; | |
005dd1eb | 1481 | |
12f89d24 MS |
1482 | fprintf(stderr, |
1483 | "DEBUG: Returning CUPS_SC_STATUS_OK with %d bytes (%s)...\n", | |
1484 | datalen, data); | |
1485 | break; | |
005dd1eb | 1486 | |
12f89d24 MS |
1487 | case CUPS_SC_CMD_GET_STATE: /* Return device state */ |
1488 | fputs("DEBUG: CUPS_SC_CMD_GET_STATE received from driver...\n", | |
1489 | stderr); | |
005dd1eb | 1490 | |
12f89d24 MS |
1491 | data[0] = CUPS_SC_STATE_ONLINE; |
1492 | cupsSideChannelWrite(command, CUPS_SC_STATUS_OK, data, 1, 1.0); | |
005dd1eb | 1493 | |
12f89d24 MS |
1494 | fprintf(stderr, |
1495 | "DEBUG: Returned CUPS_SC_STATUS_OK with 1 byte (%02X)...\n", | |
1496 | data[0]); | |
1497 | break; | |
1498 | ||
1499 | case CUPS_SC_CMD_GET_CONNECTED: /* Return whether device is | |
1500 | connected */ | |
1501 | fputs("DEBUG: CUPS_SC_CMD_GET_CONNECTED received from driver...\n", | |
1502 | stderr); | |
1503 | ||
1504 | data[0] = (g.printer->handle ? 1 : 0); | |
1505 | cupsSideChannelWrite(command, CUPS_SC_STATUS_OK, data, 1, 1.0); | |
1506 | ||
1507 | fprintf(stderr, | |
1508 | "DEBUG: Returned CUPS_SC_STATUS_OK with 1 byte (%02X)...\n", | |
1509 | data[0]); | |
1510 | break; | |
1511 | ||
1512 | default: | |
1513 | fprintf(stderr, "DEBUG: Unknown side-channel command (%d) received " | |
1514 | "from driver...\n", command); | |
1515 | ||
1516 | cupsSideChannelWrite(command, CUPS_SC_STATUS_NOT_IMPLEMENTED, | |
1517 | NULL, 0, 1.0); | |
1518 | ||
1519 | fputs("DEBUG: Returned CUPS_SC_STATUS_NOT_IMPLEMENTED with no bytes...\n", | |
1520 | stderr); | |
1521 | break; | |
1522 | } | |
1523 | } | |
1524 | while (!g.sidechannel_thread_stop); | |
1525 | ||
1526 | pthread_mutex_lock(&g.sidechannel_thread_mutex); | |
1527 | g.sidechannel_thread_done = 1; | |
1528 | pthread_cond_signal(&g.sidechannel_thread_cond); | |
1529 | pthread_mutex_unlock(&g.sidechannel_thread_mutex); | |
1530 | ||
1531 | return (NULL); | |
1532 | } | |
1533 | ||
1534 | ||
1535 | /* | |
1536 | * 'soft_reset()' - Send a soft reset to the device. | |
1537 | */ | |
1538 | ||
1539 | static void soft_reset(void) | |
1540 | { | |
1541 | fd_set input_set; /* Input set for select() */ | |
1542 | struct timeval tv; /* Time value */ | |
1543 | char buffer[2048]; /* Buffer */ | |
1544 | struct timespec cond_timeout; /* pthread condition timeout */ | |
1545 | ||
1546 | /* | |
1547 | * Send an abort once a second until the I/O lock is released by the main | |
1548 | * thread... | |
1549 | */ | |
1550 | ||
1551 | pthread_mutex_lock(&g.readwrite_lock_mutex); | |
1552 | while (g.readwrite_lock) | |
1553 | { | |
1554 | gettimeofday(&tv, NULL); | |
1555 | cond_timeout.tv_sec = tv.tv_sec + 1; | |
1556 | cond_timeout.tv_nsec = tv.tv_usec * 1000; | |
1557 | ||
1558 | while (g.readwrite_lock) | |
1559 | { | |
1560 | if (pthread_cond_timedwait(&g.readwrite_lock_cond, | |
1561 | &g.readwrite_lock_mutex, | |
1562 | &cond_timeout) != 0) | |
005dd1eb | 1563 | break; |
12f89d24 | 1564 | } |
005dd1eb MS |
1565 | } |
1566 | ||
12f89d24 MS |
1567 | g.readwrite_lock = 1; |
1568 | pthread_mutex_unlock(&g.readwrite_lock_mutex); | |
1569 | ||
1570 | /* | |
1571 | * Flush bytes waiting on print_fd... | |
1572 | */ | |
1573 | ||
1574 | g.print_bytes = 0; | |
1575 | ||
1576 | FD_ZERO(&input_set); | |
1577 | FD_SET(g.print_fd, &input_set); | |
1578 | ||
1579 | tv.tv_sec = 0; | |
1580 | tv.tv_usec = 0; | |
1581 | ||
1582 | while (select(g.print_fd+1, &input_set, NULL, NULL, &tv) > 0) | |
1583 | if (read(g.print_fd, buffer, sizeof(buffer)) <= 0) | |
1584 | break; | |
1585 | ||
1586 | /* | |
1587 | * Send the reset... | |
1588 | */ | |
1589 | ||
1590 | libusb_reset_device (g.printer->handle); | |
1591 | ||
1592 | /* | |
1593 | * Release the I/O lock... | |
1594 | */ | |
005dd1eb | 1595 | |
12f89d24 MS |
1596 | pthread_mutex_lock(&g.readwrite_lock_mutex); |
1597 | g.readwrite_lock = 0; | |
1598 | pthread_cond_signal(&g.readwrite_lock_cond); | |
1599 | pthread_mutex_unlock(&g.readwrite_lock_mutex); | |
005dd1eb MS |
1600 | } |
1601 | ||
1602 | ||
75bd9771 MS |
1603 | /* |
1604 | * End of "$Id$". | |
1605 | */ | |
1606 |