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1 | /* | |
2 | * This file is part of the libserialport project. | |
3 | * | |
4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> | |
5 | * Copyright (C) 2010-2015 Uwe Hermann <uwe@hermann-uwe.de> | |
6 | * Copyright (C) 2013-2015 Martin Ling <martin-libserialport@earth.li> | |
7 | * Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz> | |
8 | * Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org> | |
9 | * | |
10 | * This program is free software: you can redistribute it and/or modify | |
11 | * it under the terms of the GNU Lesser General Public License as | |
12 | * published by the Free Software Foundation, either version 3 of the | |
13 | * License, or (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU Lesser General Public License | |
21 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
22 | */ | |
23 | ||
24 | #include "libserialport_internal.h" | |
25 | ||
26 | static const struct std_baudrate std_baudrates[] = { | |
27 | #ifdef _WIN32 | |
28 | /* | |
29 | * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to | |
30 | * have documented CBR_* macros. | |
31 | */ | |
32 | BAUD(110), BAUD(300), BAUD(600), BAUD(1200), BAUD(2400), BAUD(4800), | |
33 | BAUD(9600), BAUD(14400), BAUD(19200), BAUD(38400), BAUD(57600), | |
34 | BAUD(115200), BAUD(128000), BAUD(256000), | |
35 | #else | |
36 | BAUD(50), BAUD(75), BAUD(110), BAUD(134), BAUD(150), BAUD(200), | |
37 | BAUD(300), BAUD(600), BAUD(1200), BAUD(1800), BAUD(2400), BAUD(4800), | |
38 | BAUD(9600), BAUD(19200), BAUD(38400), BAUD(57600), BAUD(115200), | |
39 | BAUD(230400), | |
40 | #if !defined(__APPLE__) && !defined(__OpenBSD__) | |
41 | BAUD(460800), | |
42 | #endif | |
43 | #endif | |
44 | }; | |
45 | ||
46 | #define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates) | |
47 | ||
48 | void (*sp_debug_handler)(const char *format, ...) = sp_default_debug_handler; | |
49 | ||
50 | static enum sp_return get_config(struct sp_port *port, struct port_data *data, | |
51 | struct sp_port_config *config); | |
52 | ||
53 | static enum sp_return set_config(struct sp_port *port, struct port_data *data, | |
54 | const struct sp_port_config *config); | |
55 | ||
56 | SP_API enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr) | |
57 | { | |
58 | struct sp_port *port; | |
59 | #ifndef NO_PORT_METADATA | |
60 | enum sp_return ret; | |
61 | #endif | |
62 | size_t len; | |
63 | ||
64 | TRACE("%s, %p", portname, port_ptr); | |
65 | ||
66 | if (!port_ptr) | |
67 | RETURN_ERROR(SP_ERR_ARG, "Null result pointer"); | |
68 | ||
69 | *port_ptr = NULL; | |
70 | ||
71 | if (!portname) | |
72 | RETURN_ERROR(SP_ERR_ARG, "Null port name"); | |
73 | ||
74 | DEBUG_FMT("Building structure for port %s", portname); | |
75 | ||
76 | #if !defined(_WIN32) && defined(HAVE_REALPATH) | |
77 | /* | |
78 | * get_port_details() below tries to be too smart and figure out | |
79 | * some transport properties from the port name which breaks with | |
80 | * symlinks. Therefore we canonicalize the portname first. | |
81 | */ | |
82 | char pathbuf[PATH_MAX + 1]; | |
83 | char *res = realpath(portname, pathbuf); | |
84 | if (!res) | |
85 | RETURN_ERROR(SP_ERR_ARG, "Could not retrieve realpath behind port name"); | |
86 | ||
87 | portname = pathbuf; | |
88 | #endif | |
89 | ||
90 | if (!(port = malloc(sizeof(struct sp_port)))) | |
91 | RETURN_ERROR(SP_ERR_MEM, "Port structure malloc failed"); | |
92 | ||
93 | len = strlen(portname) + 1; | |
94 | ||
95 | if (!(port->name = malloc(len))) { | |
96 | free(port); | |
97 | RETURN_ERROR(SP_ERR_MEM, "Port name malloc failed"); | |
98 | } | |
99 | ||
100 | memcpy(port->name, portname, len); | |
101 | ||
102 | #ifdef _WIN32 | |
103 | port->usb_path = NULL; | |
104 | port->hdl = INVALID_HANDLE_VALUE; | |
105 | port->write_buf = NULL; | |
106 | port->write_buf_size = 0; | |
107 | #else | |
108 | port->fd = -1; | |
109 | #endif | |
110 | ||
111 | port->description = NULL; | |
112 | port->transport = SP_TRANSPORT_NATIVE; | |
113 | port->usb_bus = -1; | |
114 | port->usb_address = -1; | |
115 | port->usb_vid = -1; | |
116 | port->usb_pid = -1; | |
117 | port->usb_manufacturer = NULL; | |
118 | port->usb_product = NULL; | |
119 | port->usb_serial = NULL; | |
120 | port->bluetooth_address = NULL; | |
121 | ||
122 | #ifndef NO_PORT_METADATA | |
123 | if ((ret = get_port_details(port)) != SP_OK) { | |
124 | sp_free_port(port); | |
125 | return ret; | |
126 | } | |
127 | #endif | |
128 | ||
129 | *port_ptr = port; | |
130 | ||
131 | RETURN_OK(); | |
132 | } | |
133 | ||
134 | SP_API char *sp_get_port_name(const struct sp_port *port) | |
135 | { | |
136 | TRACE("%p", port); | |
137 | ||
138 | if (!port) | |
139 | return NULL; | |
140 | ||
141 | RETURN_STRING(port->name); | |
142 | } | |
143 | ||
144 | SP_API char *sp_get_port_description(const struct sp_port *port) | |
145 | { | |
146 | TRACE("%p", port); | |
147 | ||
148 | if (!port || !port->description) | |
149 | return NULL; | |
150 | ||
151 | RETURN_STRING(port->description); | |
152 | } | |
153 | ||
154 | SP_API enum sp_transport sp_get_port_transport(const struct sp_port *port) | |
155 | { | |
156 | TRACE("%p", port); | |
157 | ||
158 | RETURN_INT(port ? port->transport : SP_TRANSPORT_NATIVE); | |
159 | } | |
160 | ||
161 | SP_API enum sp_return sp_get_port_usb_bus_address(const struct sp_port *port, | |
162 | int *usb_bus,int *usb_address) | |
163 | { | |
164 | TRACE("%p", port); | |
165 | ||
166 | if (!port) | |
167 | RETURN_ERROR(SP_ERR_ARG, "Null port"); | |
168 | if (port->transport != SP_TRANSPORT_USB) | |
169 | RETURN_ERROR(SP_ERR_ARG, "Port does not use USB transport"); | |
170 | if (port->usb_bus < 0 || port->usb_address < 0) | |
171 | RETURN_ERROR(SP_ERR_SUPP, "Bus and address values are not available"); | |
172 | ||
173 | if (usb_bus) | |
174 | *usb_bus = port->usb_bus; | |
175 | if (usb_address) | |
176 | *usb_address = port->usb_address; | |
177 | ||
178 | RETURN_OK(); | |
179 | } | |
180 | ||
181 | SP_API enum sp_return sp_get_port_usb_vid_pid(const struct sp_port *port, | |
182 | int *usb_vid, int *usb_pid) | |
183 | { | |
184 | TRACE("%p", port); | |
185 | ||
186 | if (!port) | |
187 | RETURN_ERROR(SP_ERR_ARG, "Null port"); | |
188 | if (port->transport != SP_TRANSPORT_USB) | |
189 | RETURN_ERROR(SP_ERR_ARG, "Port does not use USB transport"); | |
190 | if (port->usb_vid < 0 || port->usb_pid < 0) | |
191 | RETURN_ERROR(SP_ERR_SUPP, "VID:PID values are not available"); | |
192 | ||
193 | if (usb_vid) | |
194 | *usb_vid = port->usb_vid; | |
195 | if (usb_pid) | |
196 | *usb_pid = port->usb_pid; | |
197 | ||
198 | RETURN_OK(); | |
199 | } | |
200 | ||
201 | SP_API char *sp_get_port_usb_manufacturer(const struct sp_port *port) | |
202 | { | |
203 | TRACE("%p", port); | |
204 | ||
205 | if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_manufacturer) | |
206 | return NULL; | |
207 | ||
208 | RETURN_STRING(port->usb_manufacturer); | |
209 | } | |
210 | ||
211 | SP_API char *sp_get_port_usb_product(const struct sp_port *port) | |
212 | { | |
213 | TRACE("%p", port); | |
214 | ||
215 | if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_product) | |
216 | return NULL; | |
217 | ||
218 | RETURN_STRING(port->usb_product); | |
219 | } | |
220 | ||
221 | SP_API char *sp_get_port_usb_serial(const struct sp_port *port) | |
222 | { | |
223 | TRACE("%p", port); | |
224 | ||
225 | if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_serial) | |
226 | return NULL; | |
227 | ||
228 | RETURN_STRING(port->usb_serial); | |
229 | } | |
230 | ||
231 | SP_API char *sp_get_port_bluetooth_address(const struct sp_port *port) | |
232 | { | |
233 | TRACE("%p", port); | |
234 | ||
235 | if (!port || port->transport != SP_TRANSPORT_BLUETOOTH | |
236 | || !port->bluetooth_address) | |
237 | return NULL; | |
238 | ||
239 | RETURN_STRING(port->bluetooth_address); | |
240 | } | |
241 | ||
242 | SP_API enum sp_return sp_get_port_handle(const struct sp_port *port, | |
243 | void *result_ptr) | |
244 | { | |
245 | TRACE("%p, %p", port, result_ptr); | |
246 | ||
247 | if (!port) | |
248 | RETURN_ERROR(SP_ERR_ARG, "Null port"); | |
249 | if (!result_ptr) | |
250 | RETURN_ERROR(SP_ERR_ARG, "Null result pointer"); | |
251 | ||
252 | #ifdef _WIN32 | |
253 | HANDLE *handle_ptr = result_ptr; | |
254 | *handle_ptr = port->hdl; | |
255 | #else | |
256 | int *fd_ptr = result_ptr; | |
257 | *fd_ptr = port->fd; | |
258 | #endif | |
259 | ||
260 | RETURN_OK(); | |
261 | } | |
262 | ||
263 | SP_API enum sp_return sp_copy_port(const struct sp_port *port, | |
264 | struct sp_port **copy_ptr) | |
265 | { | |
266 | TRACE("%p, %p", port, copy_ptr); | |
267 | ||
268 | if (!copy_ptr) | |
269 | RETURN_ERROR(SP_ERR_ARG, "Null result pointer"); | |
270 | ||
271 | *copy_ptr = NULL; | |
272 | ||
273 | if (!port) | |
274 | RETURN_ERROR(SP_ERR_ARG, "Null port"); | |
275 | ||
276 | if (!port->name) | |
277 | RETURN_ERROR(SP_ERR_ARG, "Null port name"); | |
278 | ||
279 | DEBUG("Copying port structure"); | |
280 | ||
281 | RETURN_INT(sp_get_port_by_name(port->name, copy_ptr)); | |
282 | } | |
283 | ||
284 | SP_API void sp_free_port(struct sp_port *port) | |
285 | { | |
286 | TRACE("%p", port); | |
287 | ||
288 | if (!port) { | |
289 | DEBUG("Null port"); | |
290 | RETURN(); | |
291 | } | |
292 | ||
293 | DEBUG("Freeing port structure"); | |
294 | ||
295 | if (port->name) | |
296 | free(port->name); | |
297 | if (port->description) | |
298 | free(port->description); | |
299 | if (port->usb_manufacturer) | |
300 | free(port->usb_manufacturer); | |
301 | if (port->usb_product) | |
302 | free(port->usb_product); | |
303 | if (port->usb_serial) | |
304 | free(port->usb_serial); | |
305 | if (port->bluetooth_address) | |
306 | free(port->bluetooth_address); | |
307 | #ifdef _WIN32 | |
308 | if (port->usb_path) | |
309 | free(port->usb_path); | |
310 | if (port->write_buf) | |
311 | free(port->write_buf); | |
312 | #endif | |
313 | ||
314 | free(port); | |
315 | ||
316 | RETURN(); | |
317 | } | |
318 | ||
319 | SP_PRIV struct sp_port **list_append(struct sp_port **list, | |
320 | const char *portname) | |
321 | { | |
322 | void *tmp; | |
323 | size_t count; | |
324 | ||
325 | for (count = 0; list[count]; count++) | |
326 | ; | |
327 | if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2)))) | |
328 | goto fail; | |
329 | list = tmp; | |
330 | if (sp_get_port_by_name(portname, &list[count]) != SP_OK) | |
331 | goto fail; | |
332 | list[count + 1] = NULL; | |
333 | return list; | |
334 | ||
335 | fail: | |
336 | sp_free_port_list(list); | |
337 | return NULL; | |
338 | } | |
339 | ||
340 | SP_API enum sp_return sp_list_ports(struct sp_port ***list_ptr) | |
341 | { | |
342 | #ifndef NO_ENUMERATION | |
343 | struct sp_port **list; | |
344 | int ret; | |
345 | #endif | |
346 | ||
347 | TRACE("%p", list_ptr); | |
348 | ||
349 | if (!list_ptr) | |
350 | RETURN_ERROR(SP_ERR_ARG, "Null result pointer"); | |
351 | ||
352 | *list_ptr = NULL; | |
353 | ||
354 | #ifdef NO_ENUMERATION | |
355 | RETURN_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform"); | |
356 | #else | |
357 | DEBUG("Enumerating ports"); | |
358 | ||
359 | if (!(list = malloc(sizeof(struct sp_port *)))) | |
360 | RETURN_ERROR(SP_ERR_MEM, "Port list malloc failed"); | |
361 | ||
362 | list[0] = NULL; | |
363 | ||
364 | ret = list_ports(&list); | |
365 | ||
366 | if (ret == SP_OK) { | |
367 | *list_ptr = list; | |
368 | } else { | |
369 | sp_free_port_list(list); | |
370 | *list_ptr = NULL; | |
371 | } | |
372 | ||
373 | RETURN_CODEVAL(ret); | |
374 | #endif | |
375 | } | |
376 | ||
377 | SP_API void sp_free_port_list(struct sp_port **list) | |
378 | { | |
379 | unsigned int i; | |
380 | ||
381 | TRACE("%p", list); | |
382 | ||
383 | if (!list) { | |
384 | DEBUG("Null list"); | |
385 | RETURN(); | |
386 | } | |
387 | ||
388 | DEBUG("Freeing port list"); | |
389 | ||
390 | for (i = 0; list[i]; i++) | |
391 | sp_free_port(list[i]); | |
392 | free(list); | |
393 | ||
394 | RETURN(); | |
395 | } | |
396 | ||
397 | #define CHECK_PORT() do { \ | |
398 | if (!port) \ | |
399 | RETURN_ERROR(SP_ERR_ARG, "Null port"); \ | |
400 | if (!port->name) \ | |
401 | RETURN_ERROR(SP_ERR_ARG, "Null port name"); \ | |
402 | } while (0) | |
403 | #ifdef _WIN32 | |
404 | #define CHECK_PORT_HANDLE() do { \ | |
405 | if (port->hdl == INVALID_HANDLE_VALUE) \ | |
406 | RETURN_ERROR(SP_ERR_ARG, "Port not open"); \ | |
407 | } while (0) | |
408 | #else | |
409 | #define CHECK_PORT_HANDLE() do { \ | |
410 | if (port->fd < 0) \ | |
411 | RETURN_ERROR(SP_ERR_ARG, "Port not open"); \ | |
412 | } while (0) | |
413 | #endif | |
414 | #define CHECK_OPEN_PORT() do { \ | |
415 | CHECK_PORT(); \ | |
416 | CHECK_PORT_HANDLE(); \ | |
417 | } while (0) | |
418 | ||
419 | #ifdef WIN32 | |
420 | /** To be called after port receive buffer is emptied. */ | |
421 | static enum sp_return restart_wait(struct sp_port *port) | |
422 | { | |
423 | DWORD wait_result; | |
424 | ||
425 | if (port->wait_running) { | |
426 | /* Check status of running wait operation. */ | |
427 | if (GetOverlappedResult(port->hdl, &port->wait_ovl, | |
428 | &wait_result, FALSE)) { | |
429 | DEBUG("Previous wait completed"); | |
430 | port->wait_running = FALSE; | |
431 | } else if (GetLastError() == ERROR_IO_INCOMPLETE) { | |
432 | DEBUG("Previous wait still running"); | |
433 | RETURN_OK(); | |
434 | } else { | |
435 | RETURN_FAIL("GetOverlappedResult() failed"); | |
436 | } | |
437 | } | |
438 | ||
439 | if (!port->wait_running) { | |
440 | /* Start new wait operation. */ | |
441 | if (WaitCommEvent(port->hdl, &port->events, | |
442 | &port->wait_ovl)) { | |
443 | DEBUG("New wait returned, events already pending"); | |
444 | } else if (GetLastError() == ERROR_IO_PENDING) { | |
445 | DEBUG("New wait running in background"); | |
446 | port->wait_running = TRUE; | |
447 | } else { | |
448 | RETURN_FAIL("WaitCommEvent() failed"); | |
449 | } | |
450 | } | |
451 | ||
452 | RETURN_OK(); | |
453 | } | |
454 | #endif | |
455 | ||
456 | SP_API enum sp_return sp_open(struct sp_port *port, enum sp_mode flags) | |
457 | { | |
458 | struct port_data data; | |
459 | struct sp_port_config config; | |
460 | enum sp_return ret; | |
461 | ||
462 | TRACE("%p, 0x%x", port, flags); | |
463 | ||
464 | CHECK_PORT(); | |
465 | ||
466 | if (flags > SP_MODE_READ_WRITE) | |
467 | RETURN_ERROR(SP_ERR_ARG, "Invalid flags"); | |
468 | ||
469 | DEBUG_FMT("Opening port %s", port->name); | |
470 | ||
471 | #ifdef _WIN32 | |
472 | DWORD desired_access = 0, flags_and_attributes = 0, errors; | |
473 | char *escaped_port_name; | |
474 | COMSTAT status; | |
475 | ||
476 | /* Prefix port name with '\\.\' to work with ports above COM9. */ | |
477 | if (!(escaped_port_name = malloc(strlen(port->name) + 5))) | |
478 | RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed"); | |
479 | sprintf(escaped_port_name, "\\\\.\\%s", port->name); | |
480 | ||
481 | /* Map 'flags' to the OS-specific settings. */ | |
482 | flags_and_attributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED; | |
483 | if (flags & SP_MODE_READ) | |
484 | desired_access |= GENERIC_READ; | |
485 | if (flags & SP_MODE_WRITE) | |
486 | desired_access |= GENERIC_WRITE; | |
487 | ||
488 | port->hdl = CreateFileA(escaped_port_name, desired_access, 0, 0, | |
489 | OPEN_EXISTING, flags_and_attributes, 0); | |
490 | ||
491 | free(escaped_port_name); | |
492 | ||
493 | if (port->hdl == INVALID_HANDLE_VALUE) | |
494 | RETURN_FAIL("Port CreateFile() failed"); | |
495 | ||
496 | /* All timeouts initially disabled. */ | |
497 | port->timeouts.ReadIntervalTimeout = 0; | |
498 | port->timeouts.ReadTotalTimeoutMultiplier = 0; | |
499 | port->timeouts.ReadTotalTimeoutConstant = 0; | |
500 | port->timeouts.WriteTotalTimeoutMultiplier = 0; | |
501 | port->timeouts.WriteTotalTimeoutConstant = 0; | |
502 | ||
503 | if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) { | |
504 | sp_close(port); | |
505 | RETURN_FAIL("SetCommTimeouts() failed"); | |
506 | } | |
507 | ||
508 | /* Prepare OVERLAPPED structures. */ | |
509 | #define INIT_OVERLAPPED(ovl) do { \ | |
510 | memset(&port->ovl, 0, sizeof(port->ovl)); \ | |
511 | port->ovl.hEvent = INVALID_HANDLE_VALUE; \ | |
512 | if ((port->ovl.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL)) \ | |
513 | == INVALID_HANDLE_VALUE) { \ | |
514 | sp_close(port); \ | |
515 | RETURN_FAIL(#ovl "CreateEvent() failed"); \ | |
516 | } \ | |
517 | } while (0) | |
518 | ||
519 | INIT_OVERLAPPED(read_ovl); | |
520 | INIT_OVERLAPPED(write_ovl); | |
521 | INIT_OVERLAPPED(wait_ovl); | |
522 | ||
523 | /* Set event mask for RX and error events. */ | |
524 | if (SetCommMask(port->hdl, EV_RXCHAR | EV_ERR) == 0) { | |
525 | sp_close(port); | |
526 | RETURN_FAIL("SetCommMask() failed"); | |
527 | } | |
528 | ||
529 | port->writing = FALSE; | |
530 | port->wait_running = FALSE; | |
531 | ||
532 | ret = restart_wait(port); | |
533 | ||
534 | if (ret < 0) { | |
535 | sp_close(port); | |
536 | RETURN_CODEVAL(ret); | |
537 | } | |
538 | #else | |
539 | int flags_local = O_NONBLOCK | O_NOCTTY | O_CLOEXEC; | |
540 | ||
541 | /* Map 'flags' to the OS-specific settings. */ | |
542 | if ((flags & SP_MODE_READ_WRITE) == SP_MODE_READ_WRITE) | |
543 | flags_local |= O_RDWR; | |
544 | else if (flags & SP_MODE_READ) | |
545 | flags_local |= O_RDONLY; | |
546 | else if (flags & SP_MODE_WRITE) | |
547 | flags_local |= O_WRONLY; | |
548 | ||
549 | if ((port->fd = open(port->name, flags_local)) < 0) | |
550 | RETURN_FAIL("open() failed"); | |
551 | ||
552 | /* | |
553 | * On POSIX in the default case the file descriptor of a serial port | |
554 | * is not opened exclusively. Therefore the settings of a port are | |
555 | * overwritten if the serial port is opened a second time. Windows | |
556 | * opens all serial ports exclusively. | |
557 | * So the idea is to open the serial ports alike in the exclusive mode. | |
558 | * | |
559 | * ioctl(*, TIOCEXCL) defines the file descriptor as exclusive. So all | |
560 | * further open calls on the serial port will fail. | |
561 | * | |
562 | * There is a race condition if two processes open the same serial | |
563 | * port. None of the processes will notice the exclusive ownership of | |
564 | * the other process because ioctl() doesn't return an error code if | |
565 | * the file descriptor is already marked as exclusive. | |
566 | * This can be solved with flock(). It returns an error if the file | |
567 | * descriptor is already locked by another process. | |
568 | */ | |
569 | #ifdef HAVE_FLOCK | |
570 | if (flock(port->fd, LOCK_EX | LOCK_NB) < 0) | |
571 | RETURN_FAIL("flock() failed"); | |
572 | #endif | |
573 | ||
574 | #ifdef TIOCEXCL | |
575 | /* | |
576 | * Before Linux 3.8 ioctl(*, TIOCEXCL) was not implemented and could | |
577 | * lead to EINVAL or ENOTTY. | |
578 | * These errors aren't fatal and can be ignored. | |
579 | */ | |
580 | if (ioctl(port->fd, TIOCEXCL) < 0 && errno != EINVAL && errno != ENOTTY) | |
581 | RETURN_FAIL("ioctl() failed"); | |
582 | #endif | |
583 | ||
584 | #endif | |
585 | ||
586 | ret = get_config(port, &data, &config); | |
587 | ||
588 | if (ret < 0) { | |
589 | sp_close(port); | |
590 | RETURN_CODEVAL(ret); | |
591 | } | |
592 | ||
593 | /* Set sane port settings. */ | |
594 | #ifdef _WIN32 | |
595 | data.dcb.fBinary = TRUE; | |
596 | data.dcb.fDsrSensitivity = FALSE; | |
597 | data.dcb.fErrorChar = FALSE; | |
598 | data.dcb.fNull = FALSE; | |
599 | data.dcb.fAbortOnError = FALSE; | |
600 | #else | |
601 | /* Turn off all fancy termios tricks, give us a raw channel. */ | |
602 | data.term.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IMAXBEL); | |
603 | #ifdef IUCLC | |
604 | data.term.c_iflag &= ~IUCLC; | |
605 | #endif | |
606 | data.term.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET); | |
607 | #ifdef OLCUC | |
608 | data.term.c_oflag &= ~OLCUC; | |
609 | #endif | |
610 | #ifdef NLDLY | |
611 | data.term.c_oflag &= ~NLDLY; | |
612 | #endif | |
613 | #ifdef CRDLY | |
614 | data.term.c_oflag &= ~CRDLY; | |
615 | #endif | |
616 | #ifdef TABDLY | |
617 | data.term.c_oflag &= ~TABDLY; | |
618 | #endif | |
619 | #ifdef BSDLY | |
620 | data.term.c_oflag &= ~BSDLY; | |
621 | #endif | |
622 | #ifdef VTDLY | |
623 | data.term.c_oflag &= ~VTDLY; | |
624 | #endif | |
625 | #ifdef FFDLY | |
626 | data.term.c_oflag &= ~FFDLY; | |
627 | #endif | |
628 | #ifdef OFILL | |
629 | data.term.c_oflag &= ~OFILL; | |
630 | #endif | |
631 | data.term.c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN); | |
632 | data.term.c_cc[VMIN] = 0; | |
633 | data.term.c_cc[VTIME] = 0; | |
634 | ||
635 | /* Ignore modem status lines; enable receiver; leave control lines alone on close. */ | |
636 | data.term.c_cflag |= (CLOCAL | CREAD | HUPCL); | |
637 | #endif | |
638 | ||
639 | #ifdef _WIN32 | |
640 | if (ClearCommError(port->hdl, &errors, &status) == 0) | |
641 | RETURN_FAIL("ClearCommError() failed"); | |
642 | #endif | |
643 | ||
644 | ret = set_config(port, &data, &config); | |
645 | ||
646 | if (ret < 0) { | |
647 | sp_close(port); | |
648 | RETURN_CODEVAL(ret); | |
649 | } | |
650 | ||
651 | RETURN_OK(); | |
652 | } | |
653 | ||
654 | SP_API enum sp_return sp_close(struct sp_port *port) | |
655 | { | |
656 | TRACE("%p", port); | |
657 | ||
658 | CHECK_OPEN_PORT(); | |
659 | ||
660 | DEBUG_FMT("Closing port %s", port->name); | |
661 | ||
662 | #ifdef _WIN32 | |
663 | /* Returns non-zero upon success, 0 upon failure. */ | |
664 | if (CloseHandle(port->hdl) == 0) | |
665 | RETURN_FAIL("Port CloseHandle() failed"); | |
666 | port->hdl = INVALID_HANDLE_VALUE; | |
667 | ||
668 | /* Close event handles for overlapped structures. */ | |
669 | #define CLOSE_OVERLAPPED(ovl) do { \ | |
670 | if (port->ovl.hEvent != INVALID_HANDLE_VALUE && \ | |
671 | CloseHandle(port->ovl.hEvent) == 0) \ | |
672 | RETURN_FAIL(# ovl "event CloseHandle() failed"); \ | |
673 | } while (0) | |
674 | CLOSE_OVERLAPPED(read_ovl); | |
675 | CLOSE_OVERLAPPED(write_ovl); | |
676 | CLOSE_OVERLAPPED(wait_ovl); | |
677 | ||
678 | if (port->write_buf) { | |
679 | free(port->write_buf); | |
680 | port->write_buf = NULL; | |
681 | } | |
682 | #else | |
683 | /* Returns 0 upon success, -1 upon failure. */ | |
684 | if (close(port->fd) == -1) | |
685 | RETURN_FAIL("close() failed"); | |
686 | port->fd = -1; | |
687 | #endif | |
688 | ||
689 | RETURN_OK(); | |
690 | } | |
691 | ||
692 | SP_API enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers) | |
693 | { | |
694 | TRACE("%p, 0x%x", port, buffers); | |
695 | ||
696 | CHECK_OPEN_PORT(); | |
697 | ||
698 | if (buffers > SP_BUF_BOTH) | |
699 | RETURN_ERROR(SP_ERR_ARG, "Invalid buffer selection"); | |
700 | ||
701 | const char *buffer_names[] = {"no", "input", "output", "both"}; | |
702 | ||
703 | DEBUG_FMT("Flushing %s buffers on port %s", | |
704 | buffer_names[buffers], port->name); | |
705 | ||
706 | #ifdef _WIN32 | |
707 | DWORD flags = 0; | |
708 | if (buffers & SP_BUF_INPUT) | |
709 | flags |= PURGE_RXCLEAR; | |
710 | if (buffers & SP_BUF_OUTPUT) | |
711 | flags |= PURGE_TXCLEAR; | |
712 | ||
713 | /* Returns non-zero upon success, 0 upon failure. */ | |
714 | if (PurgeComm(port->hdl, flags) == 0) | |
715 | RETURN_FAIL("PurgeComm() failed"); | |
716 | ||
717 | if (buffers & SP_BUF_INPUT) | |
718 | TRY(restart_wait(port)); | |
719 | #else | |
720 | int flags = 0; | |
721 | if (buffers == SP_BUF_BOTH) | |
722 | flags = TCIOFLUSH; | |
723 | else if (buffers == SP_BUF_INPUT) | |
724 | flags = TCIFLUSH; | |
725 | else if (buffers == SP_BUF_OUTPUT) | |
726 | flags = TCOFLUSH; | |
727 | ||
728 | /* Returns 0 upon success, -1 upon failure. */ | |
729 | if (tcflush(port->fd, flags) < 0) | |
730 | RETURN_FAIL("tcflush() failed"); | |
731 | #endif | |
732 | RETURN_OK(); | |
733 | } | |
734 | ||
735 | SP_API enum sp_return sp_drain(struct sp_port *port) | |
736 | { | |
737 | TRACE("%p", port); | |
738 | ||
739 | CHECK_OPEN_PORT(); | |
740 | ||
741 | DEBUG_FMT("Draining port %s", port->name); | |
742 | ||
743 | #ifdef _WIN32 | |
744 | /* Returns non-zero upon success, 0 upon failure. */ | |
745 | if (FlushFileBuffers(port->hdl) == 0) | |
746 | RETURN_FAIL("FlushFileBuffers() failed"); | |
747 | RETURN_OK(); | |
748 | #else | |
749 | int result; | |
750 | while (1) { | |
751 | #if defined(__ANDROID__) && (__ANDROID_API__ < 21) | |
752 | /* Android only has tcdrain from platform 21 onwards. | |
753 | * On previous API versions, use the ioctl directly. */ | |
754 | int arg = 1; | |
755 | result = ioctl(port->fd, TCSBRK, &arg); | |
756 | #else | |
757 | result = tcdrain(port->fd); | |
758 | #endif | |
759 | if (result < 0) { | |
760 | if (errno == EINTR) { | |
761 | DEBUG("tcdrain() was interrupted"); | |
762 | continue; | |
763 | } else { | |
764 | RETURN_FAIL("tcdrain() failed"); | |
765 | } | |
766 | } else { | |
767 | RETURN_OK(); | |
768 | } | |
769 | } | |
770 | #endif | |
771 | } | |
772 | ||
773 | #ifdef _WIN32 | |
774 | static enum sp_return await_write_completion(struct sp_port *port) | |
775 | { | |
776 | TRACE("%p", port); | |
777 | DWORD bytes_written; | |
778 | BOOL result; | |
779 | ||
780 | /* Wait for previous non-blocking write to complete, if any. */ | |
781 | if (port->writing) { | |
782 | DEBUG("Waiting for previous write to complete"); | |
783 | result = GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE); | |
784 | port->writing = 0; | |
785 | if (!result) | |
786 | RETURN_FAIL("Previous write failed to complete"); | |
787 | DEBUG("Previous write completed"); | |
788 | } | |
789 | ||
790 | RETURN_OK(); | |
791 | } | |
792 | #endif | |
793 | ||
794 | SP_API enum sp_return sp_blocking_write(struct sp_port *port, const void *buf, | |
795 | size_t count, unsigned int timeout_ms) | |
796 | { | |
797 | TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms); | |
798 | ||
799 | CHECK_OPEN_PORT(); | |
800 | ||
801 | if (!buf) | |
802 | RETURN_ERROR(SP_ERR_ARG, "Null buffer"); | |
803 | ||
804 | if (timeout_ms) | |
805 | DEBUG_FMT("Writing %d bytes to port %s, timeout %d ms", | |
806 | count, port->name, timeout_ms); | |
807 | else | |
808 | DEBUG_FMT("Writing %d bytes to port %s, no timeout", | |
809 | count, port->name); | |
810 | ||
811 | if (count == 0) | |
812 | RETURN_INT(0); | |
813 | ||
814 | #ifdef _WIN32 | |
815 | DWORD remaining_ms, write_size, bytes_written; | |
816 | size_t remaining_bytes, total_bytes_written = 0; | |
817 | const uint8_t *write_ptr = (uint8_t *) buf; | |
818 | bool result; | |
819 | struct timeout timeout; | |
820 | ||
821 | timeout_start(&timeout, timeout_ms); | |
822 | ||
823 | TRY(await_write_completion(port)); | |
824 | ||
825 | while (total_bytes_written < count) { | |
826 | ||
827 | if (timeout_check(&timeout)) | |
828 | break; | |
829 | ||
830 | remaining_ms = timeout_remaining_ms(&timeout); | |
831 | ||
832 | if (port->timeouts.WriteTotalTimeoutConstant != remaining_ms) { | |
833 | port->timeouts.WriteTotalTimeoutConstant = remaining_ms; | |
834 | if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) | |
835 | RETURN_FAIL("SetCommTimeouts() failed"); | |
836 | } | |
837 | ||
838 | /* Reduce write size if it exceeds the WriteFile limit. */ | |
839 | remaining_bytes = count - total_bytes_written; | |
840 | if (remaining_bytes > WRITEFILE_MAX_SIZE) | |
841 | write_size = WRITEFILE_MAX_SIZE; | |
842 | else | |
843 | write_size = (DWORD) remaining_bytes; | |
844 | ||
845 | /* Start write. */ | |
846 | ||
847 | result = WriteFile(port->hdl, write_ptr, write_size, NULL, &port->write_ovl); | |
848 | ||
849 | timeout_update(&timeout); | |
850 | ||
851 | if (result) { | |
852 | DEBUG("Write completed immediately"); | |
853 | bytes_written = write_size; | |
854 | } else if (GetLastError() == ERROR_IO_PENDING) { | |
855 | DEBUG("Waiting for write to complete"); | |
856 | if (GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE) == 0) { | |
857 | if (GetLastError() == ERROR_SEM_TIMEOUT) { | |
858 | DEBUG("Write timed out"); | |
859 | break; | |
860 | } else { | |
861 | RETURN_FAIL("GetOverlappedResult() failed"); | |
862 | } | |
863 | } | |
864 | DEBUG_FMT("Write completed, %d/%d bytes written", bytes_written, write_size); | |
865 | } else { | |
866 | RETURN_FAIL("WriteFile() failed"); | |
867 | } | |
868 | ||
869 | write_ptr += bytes_written; | |
870 | total_bytes_written += bytes_written; | |
871 | } | |
872 | ||
873 | RETURN_INT((int) total_bytes_written); | |
874 | #else | |
875 | size_t bytes_written = 0; | |
876 | unsigned char *ptr = (unsigned char *) buf; | |
877 | struct timeout timeout; | |
878 | fd_set fds; | |
879 | int result; | |
880 | ||
881 | timeout_start(&timeout, timeout_ms); | |
882 | ||
883 | FD_ZERO(&fds); | |
884 | FD_SET(port->fd, &fds); | |
885 | ||
886 | /* Loop until we have written the requested number of bytes. */ | |
887 | while (bytes_written < count) { | |
888 | ||
889 | if (timeout_check(&timeout)) | |
890 | break; | |
891 | ||
892 | result = select(port->fd + 1, NULL, &fds, NULL, timeout_timeval(&timeout)); | |
893 | ||
894 | timeout_update(&timeout); | |
895 | ||
896 | if (result < 0) { | |
897 | if (errno == EINTR) { | |
898 | DEBUG("select() call was interrupted, repeating"); | |
899 | continue; | |
900 | } else { | |
901 | RETURN_FAIL("select() failed"); | |
902 | } | |
903 | } else if (result == 0) { | |
904 | /* Timeout has expired. */ | |
905 | break; | |
906 | } | |
907 | ||
908 | /* Do write. */ | |
909 | result = write(port->fd, ptr, count - bytes_written); | |
910 | ||
911 | if (result < 0) { | |
912 | if (errno == EAGAIN) | |
913 | /* This shouldn't happen because we did a select() first, but handle anyway. */ | |
914 | continue; | |
915 | else | |
916 | /* This is an actual failure. */ | |
917 | RETURN_FAIL("write() failed"); | |
918 | } | |
919 | ||
920 | bytes_written += result; | |
921 | ptr += result; | |
922 | } | |
923 | ||
924 | if (bytes_written < count) | |
925 | DEBUG("Write timed out"); | |
926 | ||
927 | RETURN_INT(bytes_written); | |
928 | #endif | |
929 | } | |
930 | ||
931 | SP_API enum sp_return sp_nonblocking_write(struct sp_port *port, | |
932 | const void *buf, size_t count) | |
933 | { | |
934 | TRACE("%p, %p, %d", port, buf, count); | |
935 | ||
936 | CHECK_OPEN_PORT(); | |
937 | ||
938 | if (!buf) | |
939 | RETURN_ERROR(SP_ERR_ARG, "Null buffer"); | |
940 | ||
941 | DEBUG_FMT("Writing up to %d bytes to port %s", count, port->name); | |
942 | ||
943 | if (count == 0) | |
944 | RETURN_INT(0); | |
945 | ||
946 | #ifdef _WIN32 | |
947 | size_t buf_bytes; | |
948 | ||
949 | /* Check whether previous write is complete. */ | |
950 | if (port->writing) { | |
951 | if (HasOverlappedIoCompleted(&port->write_ovl)) { | |
952 | DEBUG("Previous write completed"); | |
953 | port->writing = 0; | |
954 | } else { | |
955 | DEBUG("Previous write not complete"); | |
956 | /* Can't take a new write until the previous one finishes. */ | |
957 | RETURN_INT(0); | |
958 | } | |
959 | } | |
960 | ||
961 | /* Set timeout. */ | |
962 | if (port->timeouts.WriteTotalTimeoutConstant != 0) { | |
963 | port->timeouts.WriteTotalTimeoutConstant = 0; | |
964 | if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) | |
965 | RETURN_FAIL("SetCommTimeouts() failed"); | |
966 | } | |
967 | ||
968 | /* Reduce count if it exceeds the WriteFile limit. */ | |
969 | if (count > WRITEFILE_MAX_SIZE) | |
970 | count = WRITEFILE_MAX_SIZE; | |
971 | ||
972 | /* Copy data to our write buffer. */ | |
973 | buf_bytes = min(port->write_buf_size, count); | |
974 | memcpy(port->write_buf, buf, buf_bytes); | |
975 | ||
976 | /* Start asynchronous write. */ | |
977 | if (WriteFile(port->hdl, port->write_buf, (DWORD) buf_bytes, NULL, &port->write_ovl) == 0) { | |
978 | if (GetLastError() == ERROR_IO_PENDING) { | |
979 | if ((port->writing = !HasOverlappedIoCompleted(&port->write_ovl))) | |
980 | DEBUG("Asynchronous write completed immediately"); | |
981 | else | |
982 | DEBUG("Asynchronous write running"); | |
983 | } else { | |
984 | /* Actual failure of some kind. */ | |
985 | RETURN_FAIL("WriteFile() failed"); | |
986 | } | |
987 | } | |
988 | ||
989 | DEBUG("All bytes written immediately"); | |
990 | ||
991 | RETURN_INT((int) buf_bytes); | |
992 | #else | |
993 | /* Returns the number of bytes written, or -1 upon failure. */ | |
994 | ssize_t written = write(port->fd, buf, count); | |
995 | ||
996 | if (written < 0) { | |
997 | if (errno == EAGAIN) | |
998 | // Buffer is full, no bytes written. | |
999 | RETURN_INT(0); | |
1000 | else | |
1001 | RETURN_FAIL("write() failed"); | |
1002 | } else { | |
1003 | RETURN_INT(written); | |
1004 | } | |
1005 | #endif | |
1006 | } | |
1007 | ||
1008 | #ifdef _WIN32 | |
1009 | /* Restart wait operation if buffer was emptied. */ | |
1010 | static enum sp_return restart_wait_if_needed(struct sp_port *port, unsigned int bytes_read) | |
1011 | { | |
1012 | DWORD errors; | |
1013 | COMSTAT comstat; | |
1014 | ||
1015 | if (bytes_read == 0) | |
1016 | RETURN_OK(); | |
1017 | ||
1018 | if (ClearCommError(port->hdl, &errors, &comstat) == 0) | |
1019 | RETURN_FAIL("ClearCommError() failed"); | |
1020 | ||
1021 | if (comstat.cbInQue == 0) | |
1022 | TRY(restart_wait(port)); | |
1023 | ||
1024 | RETURN_OK(); | |
1025 | } | |
1026 | #endif | |
1027 | ||
1028 | SP_API enum sp_return sp_blocking_read(struct sp_port *port, void *buf, | |
1029 | size_t count, unsigned int timeout_ms) | |
1030 | { | |
1031 | TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms); | |
1032 | ||
1033 | CHECK_OPEN_PORT(); | |
1034 | ||
1035 | if (!buf) | |
1036 | RETURN_ERROR(SP_ERR_ARG, "Null buffer"); | |
1037 | ||
1038 | if (timeout_ms) | |
1039 | DEBUG_FMT("Reading %d bytes from port %s, timeout %d ms", | |
1040 | count, port->name, timeout_ms); | |
1041 | else | |
1042 | DEBUG_FMT("Reading %d bytes from port %s, no timeout", | |
1043 | count, port->name); | |
1044 | ||
1045 | if (count == 0) | |
1046 | RETURN_INT(0); | |
1047 | ||
1048 | #ifdef _WIN32 | |
1049 | DWORD bytes_read; | |
1050 | ||
1051 | /* Set timeout. */ | |
1052 | if (port->timeouts.ReadIntervalTimeout != 0 || | |
1053 | port->timeouts.ReadTotalTimeoutMultiplier != 0 || | |
1054 | port->timeouts.ReadTotalTimeoutConstant != timeout_ms) { | |
1055 | port->timeouts.ReadIntervalTimeout = 0; | |
1056 | port->timeouts.ReadTotalTimeoutMultiplier = 0; | |
1057 | port->timeouts.ReadTotalTimeoutConstant = timeout_ms; | |
1058 | if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) | |
1059 | RETURN_FAIL("SetCommTimeouts() failed"); | |
1060 | } | |
1061 | ||
1062 | /* Start read. */ | |
1063 | if (ReadFile(port->hdl, buf, (DWORD) count, NULL, &port->read_ovl)) { | |
1064 | DEBUG("Read completed immediately"); | |
1065 | bytes_read = (DWORD) count; | |
1066 | } else if (GetLastError() == ERROR_IO_PENDING) { | |
1067 | DEBUG("Waiting for read to complete"); | |
1068 | if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0) | |
1069 | RETURN_FAIL("GetOverlappedResult() failed"); | |
1070 | DEBUG_FMT("Read completed, %d/%d bytes read", bytes_read, count); | |
1071 | } else { | |
1072 | RETURN_FAIL("ReadFile() failed"); | |
1073 | } | |
1074 | ||
1075 | TRY(restart_wait_if_needed(port, bytes_read)); | |
1076 | ||
1077 | RETURN_INT((int) bytes_read); | |
1078 | ||
1079 | #else | |
1080 | size_t bytes_read = 0; | |
1081 | unsigned char *ptr = (unsigned char *) buf; | |
1082 | struct timeout timeout; | |
1083 | fd_set fds; | |
1084 | int result; | |
1085 | ||
1086 | timeout_start(&timeout, timeout_ms); | |
1087 | ||
1088 | FD_ZERO(&fds); | |
1089 | FD_SET(port->fd, &fds); | |
1090 | ||
1091 | /* Loop until we have the requested number of bytes. */ | |
1092 | while (bytes_read < count) { | |
1093 | ||
1094 | if (timeout_check(&timeout)) | |
1095 | /* Timeout has expired. */ | |
1096 | break; | |
1097 | ||
1098 | result = select(port->fd + 1, &fds, NULL, NULL, timeout_timeval(&timeout)); | |
1099 | ||
1100 | timeout_update(&timeout); | |
1101 | ||
1102 | if (result < 0) { | |
1103 | if (errno == EINTR) { | |
1104 | DEBUG("select() call was interrupted, repeating"); | |
1105 | continue; | |
1106 | } else { | |
1107 | RETURN_FAIL("select() failed"); | |
1108 | } | |
1109 | } else if (result == 0) { | |
1110 | /* Timeout has expired. */ | |
1111 | break; | |
1112 | } | |
1113 | ||
1114 | /* Do read. */ | |
1115 | result = read(port->fd, ptr, count - bytes_read); | |
1116 | ||
1117 | if (result < 0) { | |
1118 | if (errno == EAGAIN) | |
1119 | /* | |
1120 | * This shouldn't happen because we did a | |
1121 | * select() first, but handle anyway. | |
1122 | */ | |
1123 | continue; | |
1124 | else | |
1125 | /* This is an actual failure. */ | |
1126 | RETURN_FAIL("read() failed"); | |
1127 | } | |
1128 | ||
1129 | bytes_read += result; | |
1130 | ptr += result; | |
1131 | } | |
1132 | ||
1133 | if (bytes_read < count) | |
1134 | DEBUG("Read timed out"); | |
1135 | ||
1136 | RETURN_INT(bytes_read); | |
1137 | #endif | |
1138 | } | |
1139 | ||
1140 | SP_API enum sp_return sp_blocking_read_next(struct sp_port *port, void *buf, | |
1141 | size_t count, unsigned int timeout_ms) | |
1142 | { | |
1143 | TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms); | |
1144 | ||
1145 | CHECK_OPEN_PORT(); | |
1146 | ||
1147 | if (!buf) | |
1148 | RETURN_ERROR(SP_ERR_ARG, "Null buffer"); | |
1149 | ||
1150 | if (count == 0) | |
1151 | RETURN_ERROR(SP_ERR_ARG, "Zero count"); | |
1152 | ||
1153 | if (timeout_ms) | |
1154 | DEBUG_FMT("Reading next max %d bytes from port %s, timeout %d ms", | |
1155 | count, port->name, timeout_ms); | |
1156 | else | |
1157 | DEBUG_FMT("Reading next max %d bytes from port %s, no timeout", | |
1158 | count, port->name); | |
1159 | ||
1160 | #ifdef _WIN32 | |
1161 | DWORD bytes_read = 0; | |
1162 | ||
1163 | /* If timeout_ms == 0, set maximum timeout. */ | |
1164 | DWORD timeout_val = (timeout_ms == 0 ? MAXDWORD - 1 : timeout_ms); | |
1165 | ||
1166 | /* Set timeout. */ | |
1167 | if (port->timeouts.ReadIntervalTimeout != MAXDWORD || | |
1168 | port->timeouts.ReadTotalTimeoutMultiplier != MAXDWORD || | |
1169 | port->timeouts.ReadTotalTimeoutConstant != timeout_val) { | |
1170 | port->timeouts.ReadIntervalTimeout = MAXDWORD; | |
1171 | port->timeouts.ReadTotalTimeoutMultiplier = MAXDWORD; | |
1172 | port->timeouts.ReadTotalTimeoutConstant = timeout_val; | |
1173 | if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) | |
1174 | RETURN_FAIL("SetCommTimeouts() failed"); | |
1175 | } | |
1176 | ||
1177 | /* Loop until we have at least one byte, or timeout is reached. */ | |
1178 | while (bytes_read == 0) { | |
1179 | /* Start read. */ | |
1180 | if (ReadFile(port->hdl, buf, (DWORD) count, &bytes_read, &port->read_ovl)) { | |
1181 | DEBUG("Read completed immediately"); | |
1182 | } else if (GetLastError() == ERROR_IO_PENDING) { | |
1183 | DEBUG("Waiting for read to complete"); | |
1184 | if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0) | |
1185 | RETURN_FAIL("GetOverlappedResult() failed"); | |
1186 | if (bytes_read > 0) { | |
1187 | DEBUG("Read completed"); | |
1188 | } else if (timeout_ms > 0) { | |
1189 | DEBUG("Read timed out"); | |
1190 | break; | |
1191 | } else { | |
1192 | DEBUG("Restarting read"); | |
1193 | } | |
1194 | } else { | |
1195 | RETURN_FAIL("ReadFile() failed"); | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | TRY(restart_wait_if_needed(port, bytes_read)); | |
1200 | ||
1201 | RETURN_INT(bytes_read); | |
1202 | ||
1203 | #else | |
1204 | size_t bytes_read = 0; | |
1205 | struct timeout timeout; | |
1206 | fd_set fds; | |
1207 | int result; | |
1208 | ||
1209 | timeout_start(&timeout, timeout_ms); | |
1210 | ||
1211 | FD_ZERO(&fds); | |
1212 | FD_SET(port->fd, &fds); | |
1213 | ||
1214 | /* Loop until we have at least one byte, or timeout is reached. */ | |
1215 | while (bytes_read == 0) { | |
1216 | ||
1217 | if (timeout_check(&timeout)) | |
1218 | /* Timeout has expired. */ | |
1219 | break; | |
1220 | ||
1221 | result = select(port->fd + 1, &fds, NULL, NULL, timeout_timeval(&timeout)); | |
1222 | ||
1223 | timeout_update(&timeout); | |
1224 | ||
1225 | if (result < 0) { | |
1226 | if (errno == EINTR) { | |
1227 | DEBUG("select() call was interrupted, repeating"); | |
1228 | continue; | |
1229 | } else { | |
1230 | RETURN_FAIL("select() failed"); | |
1231 | } | |
1232 | } else if (result == 0) { | |
1233 | /* Timeout has expired. */ | |
1234 | break; | |
1235 | } | |
1236 | ||
1237 | /* Do read. */ | |
1238 | result = read(port->fd, buf, count); | |
1239 | ||
1240 | if (result < 0) { | |
1241 | if (errno == EAGAIN) | |
1242 | /* This shouldn't happen because we did a select() first, but handle anyway. */ | |
1243 | continue; | |
1244 | else | |
1245 | /* This is an actual failure. */ | |
1246 | RETURN_FAIL("read() failed"); | |
1247 | } | |
1248 | ||
1249 | bytes_read = result; | |
1250 | } | |
1251 | ||
1252 | if (bytes_read == 0) | |
1253 | DEBUG("Read timed out"); | |
1254 | ||
1255 | RETURN_INT(bytes_read); | |
1256 | #endif | |
1257 | } | |
1258 | ||
1259 | SP_API enum sp_return sp_nonblocking_read(struct sp_port *port, void *buf, | |
1260 | size_t count) | |
1261 | { | |
1262 | TRACE("%p, %p, %d", port, buf, count); | |
1263 | ||
1264 | CHECK_OPEN_PORT(); | |
1265 | ||
1266 | if (!buf) | |
1267 | RETURN_ERROR(SP_ERR_ARG, "Null buffer"); | |
1268 | ||
1269 | DEBUG_FMT("Reading up to %d bytes from port %s", count, port->name); | |
1270 | ||
1271 | #ifdef _WIN32 | |
1272 | DWORD bytes_read; | |
1273 | ||
1274 | /* Set timeout. */ | |
1275 | if (port->timeouts.ReadIntervalTimeout != MAXDWORD || | |
1276 | port->timeouts.ReadTotalTimeoutMultiplier != 0 || | |
1277 | port->timeouts.ReadTotalTimeoutConstant != 0) { | |
1278 | port->timeouts.ReadIntervalTimeout = MAXDWORD; | |
1279 | port->timeouts.ReadTotalTimeoutMultiplier = 0; | |
1280 | port->timeouts.ReadTotalTimeoutConstant = 0; | |
1281 | if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) | |
1282 | RETURN_FAIL("SetCommTimeouts() failed"); | |
1283 | } | |
1284 | ||
1285 | /* Do read. */ | |
1286 | if (ReadFile(port->hdl, buf, (DWORD) count, NULL, &port->read_ovl) == 0) | |
1287 | if (GetLastError() != ERROR_IO_PENDING) | |
1288 | RETURN_FAIL("ReadFile() failed"); | |
1289 | ||
1290 | /* Get number of bytes read. */ | |
1291 | if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, FALSE) == 0) | |
1292 | RETURN_FAIL("GetOverlappedResult() failed"); | |
1293 | ||
1294 | TRY(restart_wait_if_needed(port, bytes_read)); | |
1295 | ||
1296 | RETURN_INT(bytes_read); | |
1297 | #else | |
1298 | ssize_t bytes_read; | |
1299 | ||
1300 | /* Returns the number of bytes read, or -1 upon failure. */ | |
1301 | if ((bytes_read = read(port->fd, buf, count)) < 0) { | |
1302 | if (errno == EAGAIN) | |
1303 | /* No bytes available. */ | |
1304 | bytes_read = 0; | |
1305 | else | |
1306 | /* This is an actual failure. */ | |
1307 | RETURN_FAIL("read() failed"); | |
1308 | } | |
1309 | RETURN_INT(bytes_read); | |
1310 | #endif | |
1311 | } | |
1312 | ||
1313 | SP_API enum sp_return sp_input_waiting(struct sp_port *port) | |
1314 | { | |
1315 | TRACE("%p", port); | |
1316 | ||
1317 | CHECK_OPEN_PORT(); | |
1318 | ||
1319 | DEBUG_FMT("Checking input bytes waiting on port %s", port->name); | |
1320 | ||
1321 | #ifdef _WIN32 | |
1322 | DWORD errors; | |
1323 | COMSTAT comstat; | |
1324 | ||
1325 | if (ClearCommError(port->hdl, &errors, &comstat) == 0) | |
1326 | RETURN_FAIL("ClearCommError() failed"); | |
1327 | RETURN_INT(comstat.cbInQue); | |
1328 | #else | |
1329 | int bytes_waiting; | |
1330 | if (ioctl(port->fd, TIOCINQ, &bytes_waiting) < 0) | |
1331 | RETURN_FAIL("TIOCINQ ioctl failed"); | |
1332 | RETURN_INT(bytes_waiting); | |
1333 | #endif | |
1334 | } | |
1335 | ||
1336 | SP_API enum sp_return sp_output_waiting(struct sp_port *port) | |
1337 | { | |
1338 | TRACE("%p", port); | |
1339 | ||
1340 | #ifdef __CYGWIN__ | |
1341 | /* TIOCOUTQ is not defined in Cygwin headers */ | |
1342 | RETURN_ERROR(SP_ERR_SUPP, | |
1343 | "Getting output bytes waiting is not supported on Cygwin"); | |
1344 | #else | |
1345 | CHECK_OPEN_PORT(); | |
1346 | ||
1347 | DEBUG_FMT("Checking output bytes waiting on port %s", port->name); | |
1348 | ||
1349 | #ifdef _WIN32 | |
1350 | DWORD errors; | |
1351 | COMSTAT comstat; | |
1352 | ||
1353 | if (ClearCommError(port->hdl, &errors, &comstat) == 0) | |
1354 | RETURN_FAIL("ClearCommError() failed"); | |
1355 | RETURN_INT(comstat.cbOutQue); | |
1356 | #else | |
1357 | int bytes_waiting; | |
1358 | if (ioctl(port->fd, TIOCOUTQ, &bytes_waiting) < 0) | |
1359 | RETURN_FAIL("TIOCOUTQ ioctl failed"); | |
1360 | RETURN_INT(bytes_waiting); | |
1361 | #endif | |
1362 | #endif | |
1363 | } | |
1364 | ||
1365 | SP_API enum sp_return sp_new_event_set(struct sp_event_set **result_ptr) | |
1366 | { | |
1367 | struct sp_event_set *result; | |
1368 | ||
1369 | TRACE("%p", result_ptr); | |
1370 | ||
1371 | if (!result_ptr) | |
1372 | RETURN_ERROR(SP_ERR_ARG, "Null result"); | |
1373 | ||
1374 | *result_ptr = NULL; | |
1375 | ||
1376 | if (!(result = malloc(sizeof(struct sp_event_set)))) | |
1377 | RETURN_ERROR(SP_ERR_MEM, "sp_event_set malloc() failed"); | |
1378 | ||
1379 | memset(result, 0, sizeof(struct sp_event_set)); | |
1380 | ||
1381 | *result_ptr = result; | |
1382 | ||
1383 | RETURN_OK(); | |
1384 | } | |
1385 | ||
1386 | static enum sp_return add_handle(struct sp_event_set *event_set, | |
1387 | event_handle handle, enum sp_event mask) | |
1388 | { | |
1389 | void *new_handles; | |
1390 | enum sp_event *new_masks; | |
1391 | ||
1392 | TRACE("%p, %d, %d", event_set, handle, mask); | |
1393 | ||
1394 | if (!(new_handles = realloc(event_set->handles, | |
1395 | sizeof(event_handle) * (event_set->count + 1)))) | |
1396 | RETURN_ERROR(SP_ERR_MEM, "Handle array realloc() failed"); | |
1397 | ||
1398 | event_set->handles = new_handles; | |
1399 | ||
1400 | if (!(new_masks = realloc(event_set->masks, | |
1401 | sizeof(enum sp_event) * (event_set->count + 1)))) | |
1402 | RETURN_ERROR(SP_ERR_MEM, "Mask array realloc() failed"); | |
1403 | ||
1404 | event_set->masks = new_masks; | |
1405 | ||
1406 | ((event_handle *) event_set->handles)[event_set->count] = handle; | |
1407 | event_set->masks[event_set->count] = mask; | |
1408 | ||
1409 | event_set->count++; | |
1410 | ||
1411 | RETURN_OK(); | |
1412 | } | |
1413 | ||
1414 | SP_API enum sp_return sp_add_port_events(struct sp_event_set *event_set, | |
1415 | const struct sp_port *port, enum sp_event mask) | |
1416 | { | |
1417 | TRACE("%p, %p, %d", event_set, port, mask); | |
1418 | ||
1419 | if (!event_set) | |
1420 | RETURN_ERROR(SP_ERR_ARG, "Null event set"); | |
1421 | ||
1422 | if (!port) | |
1423 | RETURN_ERROR(SP_ERR_ARG, "Null port"); | |
1424 | ||
1425 | if (mask > (SP_EVENT_RX_READY | SP_EVENT_TX_READY | SP_EVENT_ERROR)) | |
1426 | RETURN_ERROR(SP_ERR_ARG, "Invalid event mask"); | |
1427 | ||
1428 | if (!mask) | |
1429 | RETURN_OK(); | |
1430 | ||
1431 | #ifdef _WIN32 | |
1432 | enum sp_event handle_mask; | |
1433 | if ((handle_mask = mask & SP_EVENT_TX_READY)) | |
1434 | TRY(add_handle(event_set, port->write_ovl.hEvent, handle_mask)); | |
1435 | if ((handle_mask = mask & (SP_EVENT_RX_READY | SP_EVENT_ERROR))) | |
1436 | TRY(add_handle(event_set, port->wait_ovl.hEvent, handle_mask)); | |
1437 | #else | |
1438 | TRY(add_handle(event_set, port->fd, mask)); | |
1439 | #endif | |
1440 | ||
1441 | RETURN_OK(); | |
1442 | } | |
1443 | ||
1444 | SP_API void sp_free_event_set(struct sp_event_set *event_set) | |
1445 | { | |
1446 | TRACE("%p", event_set); | |
1447 | ||
1448 | if (!event_set) { | |
1449 | DEBUG("Null event set"); | |
1450 | RETURN(); | |
1451 | } | |
1452 | ||
1453 | DEBUG("Freeing event set"); | |
1454 | ||
1455 | if (event_set->handles) | |
1456 | free(event_set->handles); | |
1457 | if (event_set->masks) | |
1458 | free(event_set->masks); | |
1459 | ||
1460 | free(event_set); | |
1461 | ||
1462 | RETURN(); | |
1463 | } | |
1464 | ||
1465 | SP_API enum sp_return sp_wait(struct sp_event_set *event_set, | |
1466 | unsigned int timeout_ms) | |
1467 | { | |
1468 | TRACE("%p, %d", event_set, timeout_ms); | |
1469 | ||
1470 | if (!event_set) | |
1471 | RETURN_ERROR(SP_ERR_ARG, "Null event set"); | |
1472 | ||
1473 | #ifdef _WIN32 | |
1474 | if (WaitForMultipleObjects(event_set->count, event_set->handles, FALSE, | |
1475 | timeout_ms ? timeout_ms : INFINITE) == WAIT_FAILED) | |
1476 | RETURN_FAIL("WaitForMultipleObjects() failed"); | |
1477 | ||
1478 | RETURN_OK(); | |
1479 | #else | |
1480 | struct timeout timeout; | |
1481 | int poll_timeout; | |
1482 | int result; | |
1483 | struct pollfd *pollfds; | |
1484 | unsigned int i; | |
1485 | ||
1486 | if (!(pollfds = malloc(sizeof(struct pollfd) * event_set->count))) | |
1487 | RETURN_ERROR(SP_ERR_MEM, "pollfds malloc() failed"); | |
1488 | ||
1489 | for (i = 0; i < event_set->count; i++) { | |
1490 | pollfds[i].fd = ((int *)event_set->handles)[i]; | |
1491 | pollfds[i].events = 0; | |
1492 | pollfds[i].revents = 0; | |
1493 | if (event_set->masks[i] & SP_EVENT_RX_READY) | |
1494 | pollfds[i].events |= POLLIN; | |
1495 | if (event_set->masks[i] & SP_EVENT_TX_READY) | |
1496 | pollfds[i].events |= POLLOUT; | |
1497 | if (event_set->masks[i] & SP_EVENT_ERROR) | |
1498 | pollfds[i].events |= POLLERR; | |
1499 | } | |
1500 | ||
1501 | timeout_start(&timeout, timeout_ms); | |
1502 | timeout_limit(&timeout, INT_MAX); | |
1503 | ||
1504 | /* Loop until an event occurs. */ | |
1505 | while (1) { | |
1506 | ||
1507 | if (timeout_check(&timeout)) { | |
1508 | DEBUG("Wait timed out"); | |
1509 | break; | |
1510 | } | |
1511 | ||
1512 | poll_timeout = (int) timeout_remaining_ms(&timeout); | |
1513 | if (poll_timeout == 0) | |
1514 | poll_timeout = -1; | |
1515 | ||
1516 | result = poll(pollfds, event_set->count, poll_timeout); | |
1517 | ||
1518 | timeout_update(&timeout); | |
1519 | ||
1520 | if (result < 0) { | |
1521 | if (errno == EINTR) { | |
1522 | DEBUG("poll() call was interrupted, repeating"); | |
1523 | continue; | |
1524 | } else { | |
1525 | free(pollfds); | |
1526 | RETURN_FAIL("poll() failed"); | |
1527 | } | |
1528 | } else if (result == 0) { | |
1529 | DEBUG("poll() timed out"); | |
1530 | if (!timeout.overflow) | |
1531 | break; | |
1532 | } else { | |
1533 | DEBUG("poll() completed"); | |
1534 | break; | |
1535 | } | |
1536 | } | |
1537 | ||
1538 | free(pollfds); | |
1539 | RETURN_OK(); | |
1540 | #endif | |
1541 | } | |
1542 | ||
1543 | #ifdef USE_TERMIOS_SPEED | |
1544 | static enum sp_return get_baudrate(int fd, int *baudrate) | |
1545 | { | |
1546 | void *data; | |
1547 | ||
1548 | TRACE("%d, %p", fd, baudrate); | |
1549 | ||
1550 | DEBUG("Getting baud rate"); | |
1551 | ||
1552 | if (!(data = malloc(get_termios_size()))) | |
1553 | RETURN_ERROR(SP_ERR_MEM, "termios malloc failed"); | |
1554 | ||
1555 | if (ioctl(fd, get_termios_get_ioctl(), data) < 0) { | |
1556 | free(data); | |
1557 | RETURN_FAIL("Getting termios failed"); | |
1558 | } | |
1559 | ||
1560 | *baudrate = get_termios_speed(data); | |
1561 | ||
1562 | free(data); | |
1563 | ||
1564 | RETURN_OK(); | |
1565 | } | |
1566 | ||
1567 | static enum sp_return set_baudrate(int fd, int baudrate) | |
1568 | { | |
1569 | void *data; | |
1570 | ||
1571 | TRACE("%d, %d", fd, baudrate); | |
1572 | ||
1573 | DEBUG("Getting baud rate"); | |
1574 | ||
1575 | if (!(data = malloc(get_termios_size()))) | |
1576 | RETURN_ERROR(SP_ERR_MEM, "termios malloc failed"); | |
1577 | ||
1578 | if (ioctl(fd, get_termios_get_ioctl(), data) < 0) { | |
1579 | free(data); | |
1580 | RETURN_FAIL("Getting termios failed"); | |
1581 | } | |
1582 | ||
1583 | DEBUG("Setting baud rate"); | |
1584 | ||
1585 | set_termios_speed(data, baudrate); | |
1586 | ||
1587 | if (ioctl(fd, get_termios_set_ioctl(), data) < 0) { | |
1588 | free(data); | |
1589 | RETURN_FAIL("Setting termios failed"); | |
1590 | } | |
1591 | ||
1592 | free(data); | |
1593 | ||
1594 | RETURN_OK(); | |
1595 | } | |
1596 | #endif /* USE_TERMIOS_SPEED */ | |
1597 | ||
1598 | #ifdef USE_TERMIOX | |
1599 | static enum sp_return get_flow(int fd, struct port_data *data) | |
1600 | { | |
1601 | void *termx; | |
1602 | ||
1603 | TRACE("%d, %p", fd, data); | |
1604 | ||
1605 | DEBUG("Getting advanced flow control"); | |
1606 | ||
1607 | if (!(termx = malloc(get_termiox_size()))) | |
1608 | RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed"); | |
1609 | ||
1610 | if (ioctl(fd, TCGETX, termx) < 0) { | |
1611 | free(termx); | |
1612 | RETURN_FAIL("Getting termiox failed"); | |
1613 | } | |
1614 | ||
1615 | get_termiox_flow(termx, &data->rts_flow, &data->cts_flow, | |
1616 | &data->dtr_flow, &data->dsr_flow); | |
1617 | ||
1618 | free(termx); | |
1619 | ||
1620 | RETURN_OK(); | |
1621 | } | |
1622 | ||
1623 | static enum sp_return set_flow(int fd, struct port_data *data) | |
1624 | { | |
1625 | void *termx; | |
1626 | ||
1627 | TRACE("%d, %p", fd, data); | |
1628 | ||
1629 | DEBUG("Getting advanced flow control"); | |
1630 | ||
1631 | if (!(termx = malloc(get_termiox_size()))) | |
1632 | RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed"); | |
1633 | ||
1634 | if (ioctl(fd, TCGETX, termx) < 0) { | |
1635 | free(termx); | |
1636 | RETURN_FAIL("Getting termiox failed"); | |
1637 | } | |
1638 | ||
1639 | DEBUG("Setting advanced flow control"); | |
1640 | ||
1641 | set_termiox_flow(termx, data->rts_flow, data->cts_flow, | |
1642 | data->dtr_flow, data->dsr_flow); | |
1643 | ||
1644 | if (ioctl(fd, TCSETX, termx) < 0) { | |
1645 | free(termx); | |
1646 | RETURN_FAIL("Setting termiox failed"); | |
1647 | } | |
1648 | ||
1649 | free(termx); | |
1650 | ||
1651 | RETURN_OK(); | |
1652 | } | |
1653 | #endif /* USE_TERMIOX */ | |
1654 | ||
1655 | static enum sp_return get_config(struct sp_port *port, struct port_data *data, | |
1656 | struct sp_port_config *config) | |
1657 | { | |
1658 | unsigned int i; | |
1659 | ||
1660 | TRACE("%p, %p, %p", port, data, config); | |
1661 | ||
1662 | DEBUG_FMT("Getting configuration for port %s", port->name); | |
1663 | ||
1664 | #ifdef _WIN32 | |
1665 | if (!GetCommState(port->hdl, &data->dcb)) | |
1666 | RETURN_FAIL("GetCommState() failed"); | |
1667 | ||
1668 | for (i = 0; i < NUM_STD_BAUDRATES; i++) { | |
1669 | if (data->dcb.BaudRate == std_baudrates[i].index) { | |
1670 | config->baudrate = std_baudrates[i].value; | |
1671 | break; | |
1672 | } | |
1673 | } | |
1674 | ||
1675 | if (i == NUM_STD_BAUDRATES) | |
1676 | /* BaudRate field can be either an index or a custom baud rate. */ | |
1677 | config->baudrate = data->dcb.BaudRate; | |
1678 | ||
1679 | config->bits = data->dcb.ByteSize; | |
1680 | ||
1681 | switch (data->dcb.Parity) { | |
1682 | case NOPARITY: | |
1683 | config->parity = SP_PARITY_NONE; | |
1684 | break; | |
1685 | case ODDPARITY: | |
1686 | config->parity = SP_PARITY_ODD; | |
1687 | break; | |
1688 | case EVENPARITY: | |
1689 | config->parity = SP_PARITY_EVEN; | |
1690 | break; | |
1691 | case MARKPARITY: | |
1692 | config->parity = SP_PARITY_MARK; | |
1693 | break; | |
1694 | case SPACEPARITY: | |
1695 | config->parity = SP_PARITY_SPACE; | |
1696 | break; | |
1697 | default: | |
1698 | config->parity = -1; | |
1699 | } | |
1700 | ||
1701 | switch (data->dcb.StopBits) { | |
1702 | case ONESTOPBIT: | |
1703 | config->stopbits = 1; | |
1704 | break; | |
1705 | case TWOSTOPBITS: | |
1706 | config->stopbits = 2; | |
1707 | break; | |
1708 | default: | |
1709 | config->stopbits = -1; | |
1710 | } | |
1711 | ||
1712 | switch (data->dcb.fRtsControl) { | |
1713 | case RTS_CONTROL_DISABLE: | |
1714 | config->rts = SP_RTS_OFF; | |
1715 | break; | |
1716 | case RTS_CONTROL_ENABLE: | |
1717 | config->rts = SP_RTS_ON; | |
1718 | break; | |
1719 | case RTS_CONTROL_HANDSHAKE: | |
1720 | config->rts = SP_RTS_FLOW_CONTROL; | |
1721 | break; | |
1722 | default: | |
1723 | config->rts = -1; | |
1724 | } | |
1725 | ||
1726 | config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE; | |
1727 | ||
1728 | switch (data->dcb.fDtrControl) { | |
1729 | case DTR_CONTROL_DISABLE: | |
1730 | config->dtr = SP_DTR_OFF; | |
1731 | break; | |
1732 | case DTR_CONTROL_ENABLE: | |
1733 | config->dtr = SP_DTR_ON; | |
1734 | break; | |
1735 | case DTR_CONTROL_HANDSHAKE: | |
1736 | config->dtr = SP_DTR_FLOW_CONTROL; | |
1737 | break; | |
1738 | default: | |
1739 | config->dtr = -1; | |
1740 | } | |
1741 | ||
1742 | config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE; | |
1743 | ||
1744 | if (data->dcb.fInX) { | |
1745 | if (data->dcb.fOutX) | |
1746 | config->xon_xoff = SP_XONXOFF_INOUT; | |
1747 | else | |
1748 | config->xon_xoff = SP_XONXOFF_IN; | |
1749 | } else { | |
1750 | if (data->dcb.fOutX) | |
1751 | config->xon_xoff = SP_XONXOFF_OUT; | |
1752 | else | |
1753 | config->xon_xoff = SP_XONXOFF_DISABLED; | |
1754 | } | |
1755 | ||
1756 | #else // !_WIN32 | |
1757 | ||
1758 | if (tcgetattr(port->fd, &data->term) < 0) | |
1759 | RETURN_FAIL("tcgetattr() failed"); | |
1760 | ||
1761 | if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0) | |
1762 | RETURN_FAIL("TIOCMGET ioctl failed"); | |
1763 | ||
1764 | #ifdef USE_TERMIOX | |
1765 | int ret = get_flow(port->fd, data); | |
1766 | ||
1767 | if (ret == SP_ERR_FAIL && errno == EINVAL) | |
1768 | data->termiox_supported = 0; | |
1769 | else if (ret < 0) | |
1770 | RETURN_CODEVAL(ret); | |
1771 | else | |
1772 | data->termiox_supported = 1; | |
1773 | #else | |
1774 | data->termiox_supported = 0; | |
1775 | #endif | |
1776 | ||
1777 | for (i = 0; i < NUM_STD_BAUDRATES; i++) { | |
1778 | if (cfgetispeed(&data->term) == std_baudrates[i].index) { | |
1779 | config->baudrate = std_baudrates[i].value; | |
1780 | break; | |
1781 | } | |
1782 | } | |
1783 | ||
1784 | if (i == NUM_STD_BAUDRATES) { | |
1785 | #ifdef __APPLE__ | |
1786 | config->baudrate = (int)data->term.c_ispeed; | |
1787 | #elif defined(USE_TERMIOS_SPEED) | |
1788 | TRY(get_baudrate(port->fd, &config->baudrate)); | |
1789 | #else | |
1790 | config->baudrate = -1; | |
1791 | #endif | |
1792 | } | |
1793 | ||
1794 | switch (data->term.c_cflag & CSIZE) { | |
1795 | case CS8: | |
1796 | config->bits = 8; | |
1797 | break; | |
1798 | case CS7: | |
1799 | config->bits = 7; | |
1800 | break; | |
1801 | case CS6: | |
1802 | config->bits = 6; | |
1803 | break; | |
1804 | case CS5: | |
1805 | config->bits = 5; | |
1806 | break; | |
1807 | default: | |
1808 | config->bits = -1; | |
1809 | } | |
1810 | ||
1811 | if (!(data->term.c_cflag & PARENB) && (data->term.c_iflag & IGNPAR)) | |
1812 | config->parity = SP_PARITY_NONE; | |
1813 | else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR)) | |
1814 | config->parity = -1; | |
1815 | #ifdef CMSPAR | |
1816 | else if (data->term.c_cflag & CMSPAR) | |
1817 | config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_MARK : SP_PARITY_SPACE; | |
1818 | #endif | |
1819 | else | |
1820 | config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN; | |
1821 | ||
1822 | config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1; | |
1823 | ||
1824 | if (data->term.c_cflag & CRTSCTS) { | |
1825 | config->rts = SP_RTS_FLOW_CONTROL; | |
1826 | config->cts = SP_CTS_FLOW_CONTROL; | |
1827 | } else { | |
1828 | if (data->termiox_supported && data->rts_flow) | |
1829 | config->rts = SP_RTS_FLOW_CONTROL; | |
1830 | else | |
1831 | config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF; | |
1832 | ||
1833 | config->cts = (data->termiox_supported && data->cts_flow) ? | |
1834 | SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE; | |
1835 | } | |
1836 | ||
1837 | if (data->termiox_supported && data->dtr_flow) | |
1838 | config->dtr = SP_DTR_FLOW_CONTROL; | |
1839 | else | |
1840 | config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF; | |
1841 | ||
1842 | config->dsr = (data->termiox_supported && data->dsr_flow) ? | |
1843 | SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE; | |
1844 | ||
1845 | if (data->term.c_iflag & IXOFF) { | |
1846 | if (data->term.c_iflag & IXON) | |
1847 | config->xon_xoff = SP_XONXOFF_INOUT; | |
1848 | else | |
1849 | config->xon_xoff = SP_XONXOFF_IN; | |
1850 | } else { | |
1851 | if (data->term.c_iflag & IXON) | |
1852 | config->xon_xoff = SP_XONXOFF_OUT; | |
1853 | else | |
1854 | config->xon_xoff = SP_XONXOFF_DISABLED; | |
1855 | } | |
1856 | #endif | |
1857 | ||
1858 | RETURN_OK(); | |
1859 | } | |
1860 | ||
1861 | static enum sp_return set_config(struct sp_port *port, struct port_data *data, | |
1862 | const struct sp_port_config *config) | |
1863 | { | |
1864 | unsigned int i; | |
1865 | #ifdef __APPLE__ | |
1866 | BAUD_TYPE baud_nonstd; | |
1867 | ||
1868 | baud_nonstd = B0; | |
1869 | #endif | |
1870 | #ifdef USE_TERMIOS_SPEED | |
1871 | int baud_nonstd = 0; | |
1872 | #endif | |
1873 | ||
1874 | TRACE("%p, %p, %p", port, data, config); | |
1875 | ||
1876 | DEBUG_FMT("Setting configuration for port %s", port->name); | |
1877 | ||
1878 | #ifdef _WIN32 | |
1879 | BYTE* new_buf; | |
1880 | ||
1881 | TRY(await_write_completion(port)); | |
1882 | ||
1883 | if (config->baudrate >= 0) { | |
1884 | for (i = 0; i < NUM_STD_BAUDRATES; i++) { | |
1885 | if (config->baudrate == std_baudrates[i].value) { | |
1886 | data->dcb.BaudRate = std_baudrates[i].index; | |
1887 | break; | |
1888 | } | |
1889 | } | |
1890 | ||
1891 | if (i == NUM_STD_BAUDRATES) | |
1892 | data->dcb.BaudRate = config->baudrate; | |
1893 | ||
1894 | /* Allocate write buffer for 50ms of data at baud rate. */ | |
1895 | port->write_buf_size = max(config->baudrate / (8 * 20), 1); | |
1896 | new_buf = realloc(port->write_buf, port->write_buf_size); | |
1897 | if (!new_buf) | |
1898 | RETURN_ERROR(SP_ERR_MEM, "Allocating write buffer failed"); | |
1899 | port->write_buf = new_buf; | |
1900 | } | |
1901 | ||
1902 | if (config->bits >= 0) | |
1903 | data->dcb.ByteSize = config->bits; | |
1904 | ||
1905 | if (config->parity >= 0) { | |
1906 | switch (config->parity) { | |
1907 | case SP_PARITY_NONE: | |
1908 | data->dcb.Parity = NOPARITY; | |
1909 | break; | |
1910 | case SP_PARITY_ODD: | |
1911 | data->dcb.Parity = ODDPARITY; | |
1912 | break; | |
1913 | case SP_PARITY_EVEN: | |
1914 | data->dcb.Parity = EVENPARITY; | |
1915 | break; | |
1916 | case SP_PARITY_MARK: | |
1917 | data->dcb.Parity = MARKPARITY; | |
1918 | break; | |
1919 | case SP_PARITY_SPACE: | |
1920 | data->dcb.Parity = SPACEPARITY; | |
1921 | break; | |
1922 | default: | |
1923 | RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting"); | |
1924 | } | |
1925 | } | |
1926 | ||
1927 | if (config->stopbits >= 0) { | |
1928 | switch (config->stopbits) { | |
1929 | /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */ | |
1930 | case 1: | |
1931 | data->dcb.StopBits = ONESTOPBIT; | |
1932 | break; | |
1933 | case 2: | |
1934 | data->dcb.StopBits = TWOSTOPBITS; | |
1935 | break; | |
1936 | default: | |
1937 | RETURN_ERROR(SP_ERR_ARG, "Invalid stop bit setting"); | |
1938 | } | |
1939 | } | |
1940 | ||
1941 | if (config->rts >= 0) { | |
1942 | switch (config->rts) { | |
1943 | case SP_RTS_OFF: | |
1944 | data->dcb.fRtsControl = RTS_CONTROL_DISABLE; | |
1945 | break; | |
1946 | case SP_RTS_ON: | |
1947 | data->dcb.fRtsControl = RTS_CONTROL_ENABLE; | |
1948 | break; | |
1949 | case SP_RTS_FLOW_CONTROL: | |
1950 | data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE; | |
1951 | break; | |
1952 | default: | |
1953 | RETURN_ERROR(SP_ERR_ARG, "Invalid RTS setting"); | |
1954 | } | |
1955 | } | |
1956 | ||
1957 | if (config->cts >= 0) { | |
1958 | switch (config->cts) { | |
1959 | case SP_CTS_IGNORE: | |
1960 | data->dcb.fOutxCtsFlow = FALSE; | |
1961 | break; | |
1962 | case SP_CTS_FLOW_CONTROL: | |
1963 | data->dcb.fOutxCtsFlow = TRUE; | |
1964 | break; | |
1965 | default: | |
1966 | RETURN_ERROR(SP_ERR_ARG, "Invalid CTS setting"); | |
1967 | } | |
1968 | } | |
1969 | ||
1970 | if (config->dtr >= 0) { | |
1971 | switch (config->dtr) { | |
1972 | case SP_DTR_OFF: | |
1973 | data->dcb.fDtrControl = DTR_CONTROL_DISABLE; | |
1974 | break; | |
1975 | case SP_DTR_ON: | |
1976 | data->dcb.fDtrControl = DTR_CONTROL_ENABLE; | |
1977 | break; | |
1978 | case SP_DTR_FLOW_CONTROL: | |
1979 | data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE; | |
1980 | break; | |
1981 | default: | |
1982 | RETURN_ERROR(SP_ERR_ARG, "Invalid DTR setting"); | |
1983 | } | |
1984 | } | |
1985 | ||
1986 | if (config->dsr >= 0) { | |
1987 | switch (config->dsr) { | |
1988 | case SP_DSR_IGNORE: | |
1989 | data->dcb.fOutxDsrFlow = FALSE; | |
1990 | break; | |
1991 | case SP_DSR_FLOW_CONTROL: | |
1992 | data->dcb.fOutxDsrFlow = TRUE; | |
1993 | break; | |
1994 | default: | |
1995 | RETURN_ERROR(SP_ERR_ARG, "Invalid DSR setting"); | |
1996 | } | |
1997 | } | |
1998 | ||
1999 | if (config->xon_xoff >= 0) { | |
2000 | switch (config->xon_xoff) { | |
2001 | case SP_XONXOFF_DISABLED: | |
2002 | data->dcb.fInX = FALSE; | |
2003 | data->dcb.fOutX = FALSE; | |
2004 | break; | |
2005 | case SP_XONXOFF_IN: | |
2006 | data->dcb.fInX = TRUE; | |
2007 | data->dcb.fOutX = FALSE; | |
2008 | break; | |
2009 | case SP_XONXOFF_OUT: | |
2010 | data->dcb.fInX = FALSE; | |
2011 | data->dcb.fOutX = TRUE; | |
2012 | break; | |
2013 | case SP_XONXOFF_INOUT: | |
2014 | data->dcb.fInX = TRUE; | |
2015 | data->dcb.fOutX = TRUE; | |
2016 | break; | |
2017 | default: | |
2018 | RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting"); | |
2019 | } | |
2020 | } | |
2021 | ||
2022 | if (!SetCommState(port->hdl, &data->dcb)) | |
2023 | RETURN_FAIL("SetCommState() failed"); | |
2024 | ||
2025 | #else /* !_WIN32 */ | |
2026 | ||
2027 | int controlbits; | |
2028 | ||
2029 | if (config->baudrate >= 0) { | |
2030 | for (i = 0; i < NUM_STD_BAUDRATES; i++) { | |
2031 | if (config->baudrate == std_baudrates[i].value) { | |
2032 | if (cfsetospeed(&data->term, std_baudrates[i].index) < 0) | |
2033 | RETURN_FAIL("cfsetospeed() failed"); | |
2034 | ||
2035 | if (cfsetispeed(&data->term, std_baudrates[i].index) < 0) | |
2036 | RETURN_FAIL("cfsetispeed() failed"); | |
2037 | break; | |
2038 | } | |
2039 | } | |
2040 | ||
2041 | /* Non-standard baud rate */ | |
2042 | if (i == NUM_STD_BAUDRATES) { | |
2043 | #ifdef __APPLE__ | |
2044 | /* Set "dummy" baud rate. */ | |
2045 | if (cfsetspeed(&data->term, B9600) < 0) | |
2046 | RETURN_FAIL("cfsetspeed() failed"); | |
2047 | baud_nonstd = config->baudrate; | |
2048 | #elif defined(USE_TERMIOS_SPEED) | |
2049 | baud_nonstd = 1; | |
2050 | #else | |
2051 | RETURN_ERROR(SP_ERR_SUPP, "Non-standard baudrate not supported"); | |
2052 | #endif | |
2053 | } | |
2054 | } | |
2055 | ||
2056 | if (config->bits >= 0) { | |
2057 | data->term.c_cflag &= ~CSIZE; | |
2058 | switch (config->bits) { | |
2059 | case 8: | |
2060 | data->term.c_cflag |= CS8; | |
2061 | break; | |
2062 | case 7: | |
2063 | data->term.c_cflag |= CS7; | |
2064 | break; | |
2065 | case 6: | |
2066 | data->term.c_cflag |= CS6; | |
2067 | break; | |
2068 | case 5: | |
2069 | data->term.c_cflag |= CS5; | |
2070 | break; | |
2071 | default: | |
2072 | RETURN_ERROR(SP_ERR_ARG, "Invalid data bits setting"); | |
2073 | } | |
2074 | } | |
2075 | ||
2076 | if (config->parity >= 0) { | |
2077 | data->term.c_iflag &= ~IGNPAR; | |
2078 | data->term.c_cflag &= ~(PARENB | PARODD); | |
2079 | #ifdef CMSPAR | |
2080 | data->term.c_cflag &= ~CMSPAR; | |
2081 | #endif | |
2082 | switch (config->parity) { | |
2083 | case SP_PARITY_NONE: | |
2084 | data->term.c_iflag |= IGNPAR; | |
2085 | break; | |
2086 | case SP_PARITY_EVEN: | |
2087 | data->term.c_cflag |= PARENB; | |
2088 | break; | |
2089 | case SP_PARITY_ODD: | |
2090 | data->term.c_cflag |= PARENB | PARODD; | |
2091 | break; | |
2092 | #ifdef CMSPAR | |
2093 | case SP_PARITY_MARK: | |
2094 | data->term.c_cflag |= PARENB | PARODD; | |
2095 | data->term.c_cflag |= CMSPAR; | |
2096 | break; | |
2097 | case SP_PARITY_SPACE: | |
2098 | data->term.c_cflag |= PARENB; | |
2099 | data->term.c_cflag |= CMSPAR; | |
2100 | break; | |
2101 | #else | |
2102 | case SP_PARITY_MARK: | |
2103 | case SP_PARITY_SPACE: | |
2104 | RETURN_ERROR(SP_ERR_SUPP, "Mark/space parity not supported"); | |
2105 | #endif | |
2106 | default: | |
2107 | RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting"); | |
2108 | } | |
2109 | } | |
2110 | ||
2111 | if (config->stopbits >= 0) { | |
2112 | data->term.c_cflag &= ~CSTOPB; | |
2113 | switch (config->stopbits) { | |
2114 | case 1: | |
2115 | data->term.c_cflag &= ~CSTOPB; | |
2116 | break; | |
2117 | case 2: | |
2118 | data->term.c_cflag |= CSTOPB; | |
2119 | break; | |
2120 | default: | |
2121 | RETURN_ERROR(SP_ERR_ARG, "Invalid stop bits setting"); | |
2122 | } | |
2123 | } | |
2124 | ||
2125 | if (config->rts >= 0 || config->cts >= 0) { | |
2126 | if (data->termiox_supported) { | |
2127 | data->rts_flow = data->cts_flow = 0; | |
2128 | switch (config->rts) { | |
2129 | case SP_RTS_OFF: | |
2130 | case SP_RTS_ON: | |
2131 | controlbits = TIOCM_RTS; | |
2132 | if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0) | |
2133 | RETURN_FAIL("Setting RTS signal level failed"); | |
2134 | break; | |
2135 | case SP_RTS_FLOW_CONTROL: | |
2136 | data->rts_flow = 1; | |
2137 | break; | |
2138 | default: | |
2139 | break; | |
2140 | } | |
2141 | if (config->cts == SP_CTS_FLOW_CONTROL) | |
2142 | data->cts_flow = 1; | |
2143 | ||
2144 | if (data->rts_flow && data->cts_flow) | |
2145 | data->term.c_iflag |= CRTSCTS; | |
2146 | else | |
2147 | data->term.c_iflag &= ~CRTSCTS; | |
2148 | } else { | |
2149 | /* Asymmetric use of RTS/CTS not supported. */ | |
2150 | if (data->term.c_iflag & CRTSCTS) { | |
2151 | /* Flow control can only be disabled for both RTS & CTS together. */ | |
2152 | if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) { | |
2153 | if (config->cts != SP_CTS_IGNORE) | |
2154 | RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together"); | |
2155 | } | |
2156 | if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) { | |
2157 | if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL) | |
2158 | RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together"); | |
2159 | } | |
2160 | } else { | |
2161 | /* Flow control can only be enabled for both RTS & CTS together. */ | |
2162 | if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) || | |
2163 | ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL))) | |
2164 | RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be enabled together"); | |
2165 | } | |
2166 | ||
2167 | if (config->rts >= 0) { | |
2168 | if (config->rts == SP_RTS_FLOW_CONTROL) { | |
2169 | data->term.c_iflag |= CRTSCTS; | |
2170 | } else { | |
2171 | controlbits = TIOCM_RTS; | |
2172 | if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC, | |
2173 | &controlbits) < 0) | |
2174 | RETURN_FAIL("Setting RTS signal level failed"); | |
2175 | } | |
2176 | } | |
2177 | } | |
2178 | } | |
2179 | ||
2180 | if (config->dtr >= 0 || config->dsr >= 0) { | |
2181 | if (data->termiox_supported) { | |
2182 | data->dtr_flow = data->dsr_flow = 0; | |
2183 | switch (config->dtr) { | |
2184 | case SP_DTR_OFF: | |
2185 | case SP_DTR_ON: | |
2186 | controlbits = TIOCM_DTR; | |
2187 | if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0) | |
2188 | RETURN_FAIL("Setting DTR signal level failed"); | |
2189 | break; | |
2190 | case SP_DTR_FLOW_CONTROL: | |
2191 | data->dtr_flow = 1; | |
2192 | break; | |
2193 | default: | |
2194 | break; | |
2195 | } | |
2196 | if (config->dsr == SP_DSR_FLOW_CONTROL) | |
2197 | data->dsr_flow = 1; | |
2198 | } else { | |
2199 | /* DTR/DSR flow control not supported. */ | |
2200 | if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL) | |
2201 | RETURN_ERROR(SP_ERR_SUPP, "DTR/DSR flow control not supported"); | |
2202 | ||
2203 | if (config->dtr >= 0) { | |
2204 | controlbits = TIOCM_DTR; | |
2205 | if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC, | |
2206 | &controlbits) < 0) | |
2207 | RETURN_FAIL("Setting DTR signal level failed"); | |
2208 | } | |
2209 | } | |
2210 | } | |
2211 | ||
2212 | if (config->xon_xoff >= 0) { | |
2213 | data->term.c_iflag &= ~(IXON | IXOFF | IXANY); | |
2214 | switch (config->xon_xoff) { | |
2215 | case SP_XONXOFF_DISABLED: | |
2216 | break; | |
2217 | case SP_XONXOFF_IN: | |
2218 | data->term.c_iflag |= IXOFF; | |
2219 | break; | |
2220 | case SP_XONXOFF_OUT: | |
2221 | data->term.c_iflag |= IXON | IXANY; | |
2222 | break; | |
2223 | case SP_XONXOFF_INOUT: | |
2224 | data->term.c_iflag |= IXON | IXOFF | IXANY; | |
2225 | break; | |
2226 | default: | |
2227 | RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting"); | |
2228 | } | |
2229 | } | |
2230 | ||
2231 | if (tcsetattr(port->fd, TCSANOW, &data->term) < 0) | |
2232 | RETURN_FAIL("tcsetattr() failed"); | |
2233 | ||
2234 | #ifdef __APPLE__ | |
2235 | if (baud_nonstd != B0) { | |
2236 | if (ioctl(port->fd, IOSSIOSPEED, &baud_nonstd) == -1) | |
2237 | RETURN_FAIL("IOSSIOSPEED ioctl failed"); | |
2238 | /* | |
2239 | * Set baud rates in data->term to correct, but incompatible | |
2240 | * with tcsetattr() value, same as delivered by tcgetattr(). | |
2241 | */ | |
2242 | if (cfsetspeed(&data->term, baud_nonstd) < 0) | |
2243 | RETURN_FAIL("cfsetspeed() failed"); | |
2244 | } | |
2245 | #elif defined(__linux__) | |
2246 | #ifdef USE_TERMIOS_SPEED | |
2247 | if (baud_nonstd) | |
2248 | TRY(set_baudrate(port->fd, config->baudrate)); | |
2249 | #endif | |
2250 | #ifdef USE_TERMIOX | |
2251 | if (data->termiox_supported) | |
2252 | TRY(set_flow(port->fd, data)); | |
2253 | #endif | |
2254 | #endif | |
2255 | ||
2256 | #endif /* !_WIN32 */ | |
2257 | ||
2258 | RETURN_OK(); | |
2259 | } | |
2260 | ||
2261 | SP_API enum sp_return sp_new_config(struct sp_port_config **config_ptr) | |
2262 | { | |
2263 | struct sp_port_config *config; | |
2264 | ||
2265 | TRACE("%p", config_ptr); | |
2266 | ||
2267 | if (!config_ptr) | |
2268 | RETURN_ERROR(SP_ERR_ARG, "Null result pointer"); | |
2269 | ||
2270 | *config_ptr = NULL; | |
2271 | ||
2272 | if (!(config = malloc(sizeof(struct sp_port_config)))) | |
2273 | RETURN_ERROR(SP_ERR_MEM, "Config malloc failed"); | |
2274 | ||
2275 | config->baudrate = -1; | |
2276 | config->bits = -1; | |
2277 | config->parity = -1; | |
2278 | config->stopbits = -1; | |
2279 | config->rts = -1; | |
2280 | config->cts = -1; | |
2281 | config->dtr = -1; | |
2282 | config->dsr = -1; | |
2283 | ||
2284 | *config_ptr = config; | |
2285 | ||
2286 | RETURN_OK(); | |
2287 | } | |
2288 | ||
2289 | SP_API void sp_free_config(struct sp_port_config *config) | |
2290 | { | |
2291 | TRACE("%p", config); | |
2292 | ||
2293 | if (!config) | |
2294 | DEBUG("Null config"); | |
2295 | else | |
2296 | free(config); | |
2297 | ||
2298 | RETURN(); | |
2299 | } | |
2300 | ||
2301 | SP_API enum sp_return sp_get_config(struct sp_port *port, | |
2302 | struct sp_port_config *config) | |
2303 | { | |
2304 | struct port_data data; | |
2305 | ||
2306 | TRACE("%p, %p", port, config); | |
2307 | ||
2308 | CHECK_OPEN_PORT(); | |
2309 | ||
2310 | if (!config) | |
2311 | RETURN_ERROR(SP_ERR_ARG, "Null config"); | |
2312 | ||
2313 | TRY(get_config(port, &data, config)); | |
2314 | ||
2315 | RETURN_OK(); | |
2316 | } | |
2317 | ||
2318 | SP_API enum sp_return sp_set_config(struct sp_port *port, | |
2319 | const struct sp_port_config *config) | |
2320 | { | |
2321 | struct port_data data; | |
2322 | struct sp_port_config prev_config; | |
2323 | ||
2324 | TRACE("%p, %p", port, config); | |
2325 | ||
2326 | CHECK_OPEN_PORT(); | |
2327 | ||
2328 | if (!config) | |
2329 | RETURN_ERROR(SP_ERR_ARG, "Null config"); | |
2330 | ||
2331 | TRY(get_config(port, &data, &prev_config)); | |
2332 | TRY(set_config(port, &data, config)); | |
2333 | ||
2334 | RETURN_OK(); | |
2335 | } | |
2336 | ||
2337 | #define CREATE_ACCESSORS(x, type) \ | |
2338 | SP_API enum sp_return sp_set_##x(struct sp_port *port, type x) { \ | |
2339 | struct port_data data; \ | |
2340 | struct sp_port_config config; \ | |
2341 | TRACE("%p, %d", port, x); \ | |
2342 | CHECK_OPEN_PORT(); \ | |
2343 | TRY(get_config(port, &data, &config)); \ | |
2344 | config.x = x; \ | |
2345 | TRY(set_config(port, &data, &config)); \ | |
2346 | RETURN_OK(); \ | |
2347 | } \ | |
2348 | SP_API enum sp_return sp_get_config_##x(const struct sp_port_config *config, \ | |
2349 | type *x) { \ | |
2350 | TRACE("%p, %p", config, x); \ | |
2351 | if (!x) \ | |
2352 | RETURN_ERROR(SP_ERR_ARG, "Null result pointer"); \ | |
2353 | if (!config) \ | |
2354 | RETURN_ERROR(SP_ERR_ARG, "Null config"); \ | |
2355 | *x = config->x; \ | |
2356 | RETURN_OK(); \ | |
2357 | } \ | |
2358 | SP_API enum sp_return sp_set_config_##x(struct sp_port_config *config, \ | |
2359 | type x) { \ | |
2360 | TRACE("%p, %d", config, x); \ | |
2361 | if (!config) \ | |
2362 | RETURN_ERROR(SP_ERR_ARG, "Null config"); \ | |
2363 | config->x = x; \ | |
2364 | RETURN_OK(); \ | |
2365 | } | |
2366 | ||
2367 | CREATE_ACCESSORS(baudrate, int) | |
2368 | CREATE_ACCESSORS(bits, int) | |
2369 | CREATE_ACCESSORS(parity, enum sp_parity) | |
2370 | CREATE_ACCESSORS(stopbits, int) | |
2371 | CREATE_ACCESSORS(rts, enum sp_rts) | |
2372 | CREATE_ACCESSORS(cts, enum sp_cts) | |
2373 | CREATE_ACCESSORS(dtr, enum sp_dtr) | |
2374 | CREATE_ACCESSORS(dsr, enum sp_dsr) | |
2375 | CREATE_ACCESSORS(xon_xoff, enum sp_xonxoff) | |
2376 | ||
2377 | SP_API enum sp_return sp_set_config_flowcontrol(struct sp_port_config *config, | |
2378 | enum sp_flowcontrol flowcontrol) | |
2379 | { | |
2380 | if (!config) | |
2381 | RETURN_ERROR(SP_ERR_ARG, "Null configuration"); | |
2382 | ||
2383 | if (flowcontrol > SP_FLOWCONTROL_DTRDSR) | |
2384 | RETURN_ERROR(SP_ERR_ARG, "Invalid flow control setting"); | |
2385 | ||
2386 | if (flowcontrol == SP_FLOWCONTROL_XONXOFF) | |
2387 | config->xon_xoff = SP_XONXOFF_INOUT; | |
2388 | else | |
2389 | config->xon_xoff = SP_XONXOFF_DISABLED; | |
2390 | ||
2391 | if (flowcontrol == SP_FLOWCONTROL_RTSCTS) { | |
2392 | config->rts = SP_RTS_FLOW_CONTROL; | |
2393 | config->cts = SP_CTS_FLOW_CONTROL; | |
2394 | } else { | |
2395 | if (config->rts == SP_RTS_FLOW_CONTROL) | |
2396 | config->rts = SP_RTS_ON; | |
2397 | config->cts = SP_CTS_IGNORE; | |
2398 | } | |
2399 | ||
2400 | if (flowcontrol == SP_FLOWCONTROL_DTRDSR) { | |
2401 | config->dtr = SP_DTR_FLOW_CONTROL; | |
2402 | config->dsr = SP_DSR_FLOW_CONTROL; | |
2403 | } else { | |
2404 | if (config->dtr == SP_DTR_FLOW_CONTROL) | |
2405 | config->dtr = SP_DTR_ON; | |
2406 | config->dsr = SP_DSR_IGNORE; | |
2407 | } | |
2408 | ||
2409 | RETURN_OK(); | |
2410 | } | |
2411 | ||
2412 | SP_API enum sp_return sp_set_flowcontrol(struct sp_port *port, | |
2413 | enum sp_flowcontrol flowcontrol) | |
2414 | { | |
2415 | struct port_data data; | |
2416 | struct sp_port_config config; | |
2417 | ||
2418 | TRACE("%p, %d", port, flowcontrol); | |
2419 | ||
2420 | CHECK_OPEN_PORT(); | |
2421 | ||
2422 | TRY(get_config(port, &data, &config)); | |
2423 | ||
2424 | TRY(sp_set_config_flowcontrol(&config, flowcontrol)); | |
2425 | ||
2426 | TRY(set_config(port, &data, &config)); | |
2427 | ||
2428 | RETURN_OK(); | |
2429 | } | |
2430 | ||
2431 | SP_API enum sp_return sp_get_signals(struct sp_port *port, | |
2432 | enum sp_signal *signals) | |
2433 | { | |
2434 | TRACE("%p, %p", port, signals); | |
2435 | ||
2436 | CHECK_OPEN_PORT(); | |
2437 | ||
2438 | if (!signals) | |
2439 | RETURN_ERROR(SP_ERR_ARG, "Null result pointer"); | |
2440 | ||
2441 | DEBUG_FMT("Getting control signals for port %s", port->name); | |
2442 | ||
2443 | *signals = 0; | |
2444 | #ifdef _WIN32 | |
2445 | DWORD bits; | |
2446 | if (GetCommModemStatus(port->hdl, &bits) == 0) | |
2447 | RETURN_FAIL("GetCommModemStatus() failed"); | |
2448 | if (bits & MS_CTS_ON) | |
2449 | *signals |= SP_SIG_CTS; | |
2450 | if (bits & MS_DSR_ON) | |
2451 | *signals |= SP_SIG_DSR; | |
2452 | if (bits & MS_RLSD_ON) | |
2453 | *signals |= SP_SIG_DCD; | |
2454 | if (bits & MS_RING_ON) | |
2455 | *signals |= SP_SIG_RI; | |
2456 | #else | |
2457 | int bits; | |
2458 | if (ioctl(port->fd, TIOCMGET, &bits) < 0) | |
2459 | RETURN_FAIL("TIOCMGET ioctl failed"); | |
2460 | if (bits & TIOCM_CTS) | |
2461 | *signals |= SP_SIG_CTS; | |
2462 | if (bits & TIOCM_DSR) | |
2463 | *signals |= SP_SIG_DSR; | |
2464 | if (bits & TIOCM_CAR) | |
2465 | *signals |= SP_SIG_DCD; | |
2466 | if (bits & TIOCM_RNG) | |
2467 | *signals |= SP_SIG_RI; | |
2468 | #endif | |
2469 | RETURN_OK(); | |
2470 | } | |
2471 | ||
2472 | SP_API enum sp_return sp_start_break(struct sp_port *port) | |
2473 | { | |
2474 | TRACE("%p", port); | |
2475 | ||
2476 | CHECK_OPEN_PORT(); | |
2477 | #ifdef _WIN32 | |
2478 | if (SetCommBreak(port->hdl) == 0) | |
2479 | RETURN_FAIL("SetCommBreak() failed"); | |
2480 | #else | |
2481 | if (ioctl(port->fd, TIOCSBRK, 1) < 0) | |
2482 | RETURN_FAIL("TIOCSBRK ioctl failed"); | |
2483 | #endif | |
2484 | ||
2485 | RETURN_OK(); | |
2486 | } | |
2487 | ||
2488 | SP_API enum sp_return sp_end_break(struct sp_port *port) | |
2489 | { | |
2490 | TRACE("%p", port); | |
2491 | ||
2492 | CHECK_OPEN_PORT(); | |
2493 | #ifdef _WIN32 | |
2494 | if (ClearCommBreak(port->hdl) == 0) | |
2495 | RETURN_FAIL("ClearCommBreak() failed"); | |
2496 | #else | |
2497 | if (ioctl(port->fd, TIOCCBRK, 1) < 0) | |
2498 | RETURN_FAIL("TIOCCBRK ioctl failed"); | |
2499 | #endif | |
2500 | ||
2501 | RETURN_OK(); | |
2502 | } | |
2503 | ||
2504 | SP_API int sp_last_error_code(void) | |
2505 | { | |
2506 | TRACE_VOID(); | |
2507 | #ifdef _WIN32 | |
2508 | RETURN_INT(GetLastError()); | |
2509 | #else | |
2510 | RETURN_INT(errno); | |
2511 | #endif | |
2512 | } | |
2513 | ||
2514 | SP_API char *sp_last_error_message(void) | |
2515 | { | |
2516 | TRACE_VOID(); | |
2517 | ||
2518 | #ifdef _WIN32 | |
2519 | char *message; | |
2520 | DWORD error = GetLastError(); | |
2521 | ||
2522 | DWORD length = FormatMessageA( | |
2523 | FORMAT_MESSAGE_ALLOCATE_BUFFER | | |
2524 | FORMAT_MESSAGE_FROM_SYSTEM | | |
2525 | FORMAT_MESSAGE_IGNORE_INSERTS, | |
2526 | NULL, | |
2527 | error, | |
2528 | MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), | |
2529 | (LPSTR) &message, | |
2530 | 0, NULL ); | |
2531 | ||
2532 | if (length >= 2 && message[length - 2] == '\r') | |
2533 | message[length - 2] = '\0'; | |
2534 | ||
2535 | RETURN_STRING(message); | |
2536 | #else | |
2537 | RETURN_STRING(strerror(errno)); | |
2538 | #endif | |
2539 | } | |
2540 | ||
2541 | SP_API void sp_free_error_message(char *message) | |
2542 | { | |
2543 | TRACE("%s", message); | |
2544 | ||
2545 | #ifdef _WIN32 | |
2546 | LocalFree(message); | |
2547 | #else | |
2548 | (void)message; | |
2549 | #endif | |
2550 | ||
2551 | RETURN(); | |
2552 | } | |
2553 | ||
2554 | SP_API void sp_set_debug_handler(void (*handler)(const char *format, ...)) | |
2555 | { | |
2556 | TRACE("%p", handler); | |
2557 | ||
2558 | sp_debug_handler = handler; | |
2559 | ||
2560 | RETURN(); | |
2561 | } | |
2562 | ||
2563 | SP_API void sp_default_debug_handler(const char *format, ...) | |
2564 | { | |
2565 | va_list args; | |
2566 | va_start(args, format); | |
2567 | if (getenv("LIBSERIALPORT_DEBUG")) { | |
2568 | fputs("sp: ", stderr); | |
2569 | vfprintf(stderr, format, args); | |
2570 | } | |
2571 | va_end(args); | |
2572 | } | |
2573 | ||
2574 | SP_API int sp_get_major_package_version(void) | |
2575 | { | |
2576 | return SP_PACKAGE_VERSION_MAJOR; | |
2577 | } | |
2578 | ||
2579 | SP_API int sp_get_minor_package_version(void) | |
2580 | { | |
2581 | return SP_PACKAGE_VERSION_MINOR; | |
2582 | } | |
2583 | ||
2584 | SP_API int sp_get_micro_package_version(void) | |
2585 | { | |
2586 | return SP_PACKAGE_VERSION_MICRO; | |
2587 | } | |
2588 | ||
2589 | SP_API const char *sp_get_package_version_string(void) | |
2590 | { | |
2591 | return SP_PACKAGE_VERSION_STRING; | |
2592 | } | |
2593 | ||
2594 | SP_API int sp_get_current_lib_version(void) | |
2595 | { | |
2596 | return SP_LIB_VERSION_CURRENT; | |
2597 | } | |
2598 | ||
2599 | SP_API int sp_get_revision_lib_version(void) | |
2600 | { | |
2601 | return SP_LIB_VERSION_REVISION; | |
2602 | } | |
2603 | ||
2604 | SP_API int sp_get_age_lib_version(void) | |
2605 | { | |
2606 | return SP_LIB_VERSION_AGE; | |
2607 | } | |
2608 | ||
2609 | SP_API const char *sp_get_lib_version_string(void) | |
2610 | { | |
2611 | return SP_LIB_VERSION_STRING; | |
2612 | } | |
2613 | ||
2614 | /** @} */ |