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Constify the sp_get_port_description() parameter.
[libserialport/gsi.git] / serialport.c
blob074534edb8a898c280109a25b3da9ae537e1820e
1 /*
2 * This file is part of the libserialport project.
3 *
4 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
5 * Copyright (C) 2010-2012 Uwe Hermann <uwe@hermann-uwe.de>
6 * Copyright (C) 2013 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.h"
25 #include "libserialport_internal.h"
26
27 static const struct std_baudrate std_baudrates[] = {
28 #ifdef _WIN32
29 /*
30 * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
31 * have documented CBR_* macros.
32 */
33 BAUD(110), BAUD(300), BAUD(600), BAUD(1200), BAUD(2400), BAUD(4800),
34 BAUD(9600), BAUD(14400), BAUD(19200), BAUD(38400), BAUD(57600),
35 BAUD(115200), BAUD(128000), BAUD(256000),
36 #else
37 BAUD(50), BAUD(75), BAUD(110), BAUD(134), BAUD(150), BAUD(200),
38 BAUD(300), BAUD(600), BAUD(1200), BAUD(1800), BAUD(2400), BAUD(4800),
39 BAUD(9600), BAUD(19200), BAUD(38400), BAUD(57600), BAUD(115200),
40 BAUD(230400),
41 #if !defined(__APPLE__) && !defined(__OpenBSD__)
42 BAUD(460800),
43 #endif
44 #endif
45 };
46
47 #define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)
48
49 void (*sp_debug_handler)(const char *format, ...) = sp_default_debug_handler;
50
51 static enum sp_return get_config(struct sp_port *port, struct port_data *data,
52 struct sp_port_config *config);
53
54 static enum sp_return set_config(struct sp_port *port, struct port_data *data,
55 const struct sp_port_config *config);
56
57 SP_API enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
58 {
59 struct sp_port *port;
60 #ifndef NO_PORT_METADATA
61 enum sp_return ret;
62 #endif
63 int len;
64
65 TRACE("%s, %p", portname, port_ptr);
66
67 if (!port_ptr)
68 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
69
70 *port_ptr = NULL;
71
72 if (!portname)
73 RETURN_ERROR(SP_ERR_ARG, "Null port name");
74
75 DEBUG_FMT("Building structure for port %s", portname);
76
77 if (!(port = malloc(sizeof(struct sp_port))))
78 RETURN_ERROR(SP_ERR_MEM, "Port structure malloc failed");
79
80 len = strlen(portname) + 1;
81
82 if (!(port->name = malloc(len))) {
83 free(port);
84 RETURN_ERROR(SP_ERR_MEM, "Port name malloc failed");
85 }
86
87 memcpy(port->name, portname, len);
88
89 #ifdef _WIN32
90 port->usb_path = NULL;
91 port->hdl = INVALID_HANDLE_VALUE;
92 #else
93 port->fd = -1;
94 #endif
95
96 port->description = NULL;
97 port->transport = SP_TRANSPORT_NATIVE;
98 port->usb_bus = -1;
99 port->usb_address = -1;
100 port->usb_vid = -1;
101 port->usb_pid = -1;
102 port->usb_manufacturer = NULL;
103 port->usb_product = NULL;
104 port->usb_serial = NULL;
105 port->bluetooth_address = NULL;
106
107 #ifndef NO_PORT_METADATA
108 if ((ret = get_port_details(port)) != SP_OK) {
109 sp_free_port(port);
110 return ret;
111 }
112 #endif
113
114 *port_ptr = port;
115
116 RETURN_OK();
117 }
118
119 SP_API char *sp_get_port_name(const struct sp_port *port)
120 {
121 TRACE("%p", port);
122
123 if (!port)
124 return NULL;
125
126 RETURN_STRING(port->name);
127 }
128
129 SP_API char *sp_get_port_description(const struct sp_port *port)
130 {
131 TRACE("%p", port);
132
133 if (!port || !port->description)
134 return NULL;
135
136 RETURN_STRING(port->description);
137 }
138
139 SP_API enum sp_transport sp_get_port_transport(const struct sp_port *port)
140 {
141 TRACE("%p", port);
142
143 if (!port)
144 RETURN_ERROR(SP_ERR_ARG, "Null port");
145
146 RETURN_INT(port->transport);
147 }
148
149 SP_API enum sp_return sp_get_port_usb_bus_address(const struct sp_port *port,
150 int *usb_bus,int *usb_address)
151 {
152 TRACE("%p", port);
153
154 if (!port)
155 RETURN_ERROR(SP_ERR_ARG, "Null port");
156 if (port->transport != SP_TRANSPORT_USB)
157 RETURN_ERROR(SP_ERR_ARG, "Port does not use USB transport");
158 if (port->usb_bus < 0 || port->usb_address < 0)
159 RETURN_ERROR(SP_ERR_SUPP, "Bus and address values are not available");
160
161 if (usb_bus)
162 *usb_bus = port->usb_bus;
163 if (usb_address)
164 *usb_address = port->usb_address;
165
166 RETURN_OK();
167 }
168
169 SP_API enum sp_return sp_get_port_usb_vid_pid(const struct sp_port *port,
170 int *usb_vid, int *usb_pid)
171 {
172 TRACE("%p", port);
173
174 if (!port)
175 RETURN_ERROR(SP_ERR_ARG, "Null port");
176 if (port->transport != SP_TRANSPORT_USB)
177 RETURN_ERROR(SP_ERR_ARG, "Port does not use USB transport");
178 if (port->usb_vid < 0 || port->usb_pid < 0)
179 RETURN_ERROR(SP_ERR_SUPP, "VID:PID values are not available");
180
181 if (usb_vid)
182 *usb_vid = port->usb_vid;
183 if (usb_pid)
184 *usb_pid = port->usb_pid;
185
186 RETURN_OK();
187 }
188
189 SP_API char *sp_get_port_usb_manufacturer(const struct sp_port *port)
190 {
191 TRACE("%p", port);
192
193 if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_manufacturer)
194 return NULL;
195
196 RETURN_STRING(port->usb_manufacturer);
197 }
198
199 SP_API char *sp_get_port_usb_product(const struct sp_port *port)
200 {
201 TRACE("%p", port);
202
203 if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_product)
204 return NULL;
205
206 RETURN_STRING(port->usb_product);
207 }
208
209 SP_API char *sp_get_port_usb_serial(const struct sp_port *port)
210 {
211 TRACE("%p", port);
212
213 if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_serial)
214 return NULL;
215
216 RETURN_STRING(port->usb_serial);
217 }
218
219 SP_API char *sp_get_port_bluetooth_address(const struct sp_port *port)
220 {
221 TRACE("%p", port);
222
223 if (!port || port->transport != SP_TRANSPORT_BLUETOOTH
224 || !port->bluetooth_address)
225 return NULL;
226
227 RETURN_STRING(port->bluetooth_address);
228 }
229
230 SP_API enum sp_return sp_get_port_handle(const struct sp_port *port,
231 void *result_ptr)
232 {
233 TRACE("%p, %p", port, result_ptr);
234
235 if (!port)
236 RETURN_ERROR(SP_ERR_ARG, "Null port");
237
238 #ifdef _WIN32
239 HANDLE *handle_ptr = result_ptr;
240 *handle_ptr = port->hdl;
241 #else
242 int *fd_ptr = result_ptr;
243 *fd_ptr = port->fd;
244 #endif
245
246 RETURN_OK();
247 }
248
249 SP_API enum sp_return sp_copy_port(const struct sp_port *port,
250 struct sp_port **copy_ptr)
251 {
252 TRACE("%p, %p", port, copy_ptr);
253
254 if (!copy_ptr)
255 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
256
257 *copy_ptr = NULL;
258
259 if (!port)
260 RETURN_ERROR(SP_ERR_ARG, "Null port");
261
262 if (!port->name)
263 RETURN_ERROR(SP_ERR_ARG, "Null port name");
264
265 DEBUG("Copying port structure");
266
267 RETURN_INT(sp_get_port_by_name(port->name, copy_ptr));
268 }
269
270 SP_API void sp_free_port(struct sp_port *port)
271 {
272 TRACE("%p", port);
273
274 if (!port) {
275 DEBUG("Null port");
276 RETURN();
277 }
278
279 DEBUG("Freeing port structure");
280
281 if (port->name)
282 free(port->name);
283 if (port->description)
284 free(port->description);
285 if (port->usb_manufacturer)
286 free(port->usb_manufacturer);
287 if (port->usb_product)
288 free(port->usb_product);
289 if (port->usb_serial)
290 free(port->usb_serial);
291 if (port->bluetooth_address)
292 free(port->bluetooth_address);
293 #ifdef _WIN32
294 if (port->usb_path)
295 free(port->usb_path);
296 #endif
297
298 free(port);
299
300 RETURN();
301 }
302
303 SP_PRIV struct sp_port **list_append(struct sp_port **list,
304 const char *portname)
305 {
306 void *tmp;
307 unsigned int count;
308
309 for (count = 0; list[count]; count++);
310 if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
311 goto fail;
312 list = tmp;
313 if (sp_get_port_by_name(portname, &list[count]) != SP_OK)
314 goto fail;
315 list[count + 1] = NULL;
316 return list;
317
318 fail:
319 sp_free_port_list(list);
320 return NULL;
321 }
322
323 SP_API enum sp_return sp_list_ports(struct sp_port ***list_ptr)
324 {
325 #ifndef NO_ENUMERATION
326 struct sp_port **list;
327 int ret;
328 #endif
329
330 TRACE("%p", list_ptr);
331
332 if (!list_ptr)
333 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
334
335 #ifdef NO_ENUMERATION
336 RETURN_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform");
337 #else
338 DEBUG("Enumerating ports");
339
340 if (!(list = malloc(sizeof(struct sp_port *))))
341 RETURN_ERROR(SP_ERR_MEM, "Port list malloc failed");
342
343 list[0] = NULL;
344
345 ret = list_ports(&list);
346
347 if (ret == SP_OK) {
348 *list_ptr = list;
349 } else {
350 sp_free_port_list(list);
351 *list_ptr = NULL;
352 }
353
354 RETURN_CODEVAL(ret);
355 #endif
356 }
357
358 SP_API void sp_free_port_list(struct sp_port **list)
359 {
360 unsigned int i;
361
362 TRACE("%p", list);
363
364 if (!list) {
365 DEBUG("Null list");
366 RETURN();
367 }
368
369 DEBUG("Freeing port list");
370
371 for (i = 0; list[i]; i++)
372 sp_free_port(list[i]);
373 free(list);
374
375 RETURN();
376 }
377
378 #define CHECK_PORT() do { \
379 if (!port) \
380 RETURN_ERROR(SP_ERR_ARG, "Null port"); \
381 if (!port->name) \
382 RETURN_ERROR(SP_ERR_ARG, "Null port name"); \
383 } while (0)
384 #ifdef _WIN32
385 #define CHECK_PORT_HANDLE() do { \
386 if (port->hdl == INVALID_HANDLE_VALUE) \
387 RETURN_ERROR(SP_ERR_ARG, "Invalid port handle"); \
388 } while (0)
389 #else
390 #define CHECK_PORT_HANDLE() do { \
391 if (port->fd < 0) \
392 RETURN_ERROR(SP_ERR_ARG, "Invalid port fd"); \
393 } while (0)
394 #endif
395 #define CHECK_OPEN_PORT() do { \
396 CHECK_PORT(); \
397 CHECK_PORT_HANDLE(); \
398 } while (0)
399
400 #ifdef WIN32
401 /** To be called after port receive buffer is emptied. */
402 static enum sp_return restart_wait(struct sp_port *port)
403 {
404 DWORD wait_result;
405
406 if (port->wait_running) {
407 /* Check status of running wait operation. */
408 if (GetOverlappedResult(port->hdl, &port->wait_ovl,
409 &wait_result, FALSE)) {
410 DEBUG("Previous wait completed");
411 port->wait_running = FALSE;
412 } else if (GetLastError() == ERROR_IO_INCOMPLETE) {
413 DEBUG("Previous wait still running");
414 RETURN_OK();
415 } else {
416 RETURN_FAIL("GetOverlappedResult() failed");
417 }
418 }
419
420 if (!port->wait_running) {
421 /* Start new wait operation. */
422 if (WaitCommEvent(port->hdl, &port->events,
423 &port->wait_ovl)) {
424 DEBUG("New wait returned, events already pending");
425 } else if (GetLastError() == ERROR_IO_PENDING) {
426 DEBUG("New wait running in background");
427 port->wait_running = TRUE;
428 } else {
429 RETURN_FAIL("WaitCommEvent() failed");
430 }
431 }
432
433 RETURN_OK();
434 }
435 #endif
436
437 SP_API enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
438 {
439 struct port_data data;
440 struct sp_port_config config;
441 enum sp_return ret;
442
443 TRACE("%p, 0x%x", port, flags);
444
445 CHECK_PORT();
446
447 if (flags > SP_MODE_READ_WRITE)
448 RETURN_ERROR(SP_ERR_ARG, "Invalid flags");
449
450 DEBUG_FMT("Opening port %s", port->name);
451
452 #ifdef _WIN32
453 DWORD desired_access = 0, flags_and_attributes = 0, errors;
454 char *escaped_port_name;
455 COMSTAT status;
456
457 /* Prefix port name with '\\.\' to work with ports above COM9. */
458 if (!(escaped_port_name = malloc(strlen(port->name) + 5)))
459 RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
460 sprintf(escaped_port_name, "\\\\.\\%s", port->name);
461
462 /* Map 'flags' to the OS-specific settings. */
463 flags_and_attributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED;
464 if (flags & SP_MODE_READ)
465 desired_access |= GENERIC_READ;
466 if (flags & SP_MODE_WRITE)
467 desired_access |= GENERIC_WRITE;
468
469 port->hdl = CreateFile(escaped_port_name, desired_access, 0, 0,
470 OPEN_EXISTING, flags_and_attributes, 0);
471
472 free(escaped_port_name);
473
474 if (port->hdl == INVALID_HANDLE_VALUE)
475 RETURN_FAIL("Port CreateFile() failed");
476
477 /* All timeouts initially disabled. */
478 port->timeouts.ReadIntervalTimeout = 0;
479 port->timeouts.ReadTotalTimeoutMultiplier = 0;
480 port->timeouts.ReadTotalTimeoutConstant = 0;
481 port->timeouts.WriteTotalTimeoutMultiplier = 0;
482 port->timeouts.WriteTotalTimeoutConstant = 0;
483
484 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) {
485 sp_close(port);
486 RETURN_FAIL("SetCommTimeouts() failed");
487 }
488
489 /* Prepare OVERLAPPED structures. */
490 #define INIT_OVERLAPPED(ovl) do { \
491 memset(&port->ovl, 0, sizeof(port->ovl)); \
492 port->ovl.hEvent = INVALID_HANDLE_VALUE; \
493 if ((port->ovl.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL)) \
494 == INVALID_HANDLE_VALUE) { \
495 sp_close(port); \
496 RETURN_FAIL(#ovl "CreateEvent() failed"); \
497 } \
498 } while (0)
499
500 INIT_OVERLAPPED(read_ovl);
501 INIT_OVERLAPPED(write_ovl);
502 INIT_OVERLAPPED(wait_ovl);
503
504 /* Set event mask for RX and error events. */
505 if (SetCommMask(port->hdl, EV_RXCHAR | EV_ERR) == 0) {
506 sp_close(port);
507 RETURN_FAIL("SetCommMask() failed");
508 }
509
510 port->writing = FALSE;
511 port->wait_running = FALSE;
512
513 ret = restart_wait(port);
514
515 if (ret < 0) {
516 sp_close(port);
517 RETURN_CODEVAL(ret);
518 }
519 #else
520 int flags_local = O_NONBLOCK | O_NOCTTY;
521
522 /* Map 'flags' to the OS-specific settings. */
523 if ((flags & SP_MODE_READ_WRITE) == SP_MODE_READ_WRITE)
524 flags_local |= O_RDWR;
525 else if (flags & SP_MODE_READ)
526 flags_local |= O_RDONLY;
527 else if (flags & SP_MODE_WRITE)
528 flags_local |= O_WRONLY;
529
530 if ((port->fd = open(port->name, flags_local)) < 0)
531 RETURN_FAIL("open() failed");
532 #endif
533
534 ret = get_config(port, &data, &config);
535
536 if (ret < 0) {
537 sp_close(port);
538 RETURN_CODEVAL(ret);
539 }
540
541 /* Set sane port settings. */
542 #ifdef _WIN32
543 data.dcb.fBinary = TRUE;
544 data.dcb.fDsrSensitivity = FALSE;
545 data.dcb.fErrorChar = FALSE;
546 data.dcb.fNull = FALSE;
547 data.dcb.fAbortOnError = FALSE;
548 #else
549 /* Turn off all fancy termios tricks, give us a raw channel. */
550 data.term.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IMAXBEL);
551 #ifdef IUCLC
552 data.term.c_iflag &= ~IUCLC;
553 #endif
554 data.term.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET);
555 #ifdef OLCUC
556 data.term.c_oflag &= ~OLCUC;
557 #endif
558 #ifdef NLDLY
559 data.term.c_oflag &= ~NLDLY;
560 #endif
561 #ifdef CRDLY
562 data.term.c_oflag &= ~CRDLY;
563 #endif
564 #ifdef TABDLY
565 data.term.c_oflag &= ~TABDLY;
566 #endif
567 #ifdef BSDLY
568 data.term.c_oflag &= ~BSDLY;
569 #endif
570 #ifdef VTDLY
571 data.term.c_oflag &= ~VTDLY;
572 #endif
573 #ifdef FFDLY
574 data.term.c_oflag &= ~FFDLY;
575 #endif
576 #ifdef OFILL
577 data.term.c_oflag &= ~OFILL;
578 #endif
579 data.term.c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN);
580 data.term.c_cc[VMIN] = 0;
581 data.term.c_cc[VTIME] = 0;
582
583 /* Ignore modem status lines; enable receiver; leave control lines alone on close. */
584 data.term.c_cflag |= (CLOCAL | CREAD | HUPCL);
585 #endif
586
587 #ifdef _WIN32
588 if (ClearCommError(port->hdl, &errors, &status) == 0)
589 RETURN_FAIL("ClearCommError() failed");
590 #endif
591
592 ret = set_config(port, &data, &config);
593
594 if (ret < 0) {
595 sp_close(port);
596 RETURN_CODEVAL(ret);
597 }
598
599 RETURN_OK();
600 }
601
602 SP_API enum sp_return sp_close(struct sp_port *port)
603 {
604 TRACE("%p", port);
605
606 CHECK_OPEN_PORT();
607
608 DEBUG_FMT("Closing port %s", port->name);
609
610 #ifdef _WIN32
611 /* Returns non-zero upon success, 0 upon failure. */
612 if (CloseHandle(port->hdl) == 0)
613 RETURN_FAIL("Port CloseHandle() failed");
614 port->hdl = INVALID_HANDLE_VALUE;
615
616 /* Close event handles for overlapped structures. */
617 #define CLOSE_OVERLAPPED(ovl) do { \
618 if (port->ovl.hEvent != INVALID_HANDLE_VALUE && \
619 CloseHandle(port->ovl.hEvent) == 0) \
620 RETURN_FAIL(# ovl "event CloseHandle() failed"); \
621 } while (0)
622 CLOSE_OVERLAPPED(read_ovl);
623 CLOSE_OVERLAPPED(write_ovl);
624 CLOSE_OVERLAPPED(wait_ovl);
625
626 #else
627 /* Returns 0 upon success, -1 upon failure. */
628 if (close(port->fd) == -1)
629 RETURN_FAIL("close() failed");
630 port->fd = -1;
631 #endif
632
633 RETURN_OK();
634 }
635
636 SP_API enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers)
637 {
638 TRACE("%p, 0x%x", port, buffers);
639
640 CHECK_OPEN_PORT();
641
642 if (buffers > SP_BUF_BOTH)
643 RETURN_ERROR(SP_ERR_ARG, "Invalid buffer selection");
644
645 const char *buffer_names[] = {"no", "input", "output", "both"};
646
647 DEBUG_FMT("Flushing %s buffers on port %s",
648 buffer_names[buffers], port->name);
649
650 #ifdef _WIN32
651 DWORD flags = 0;
652 if (buffers & SP_BUF_INPUT)
653 flags |= PURGE_RXCLEAR;
654 if (buffers & SP_BUF_OUTPUT)
655 flags |= PURGE_TXCLEAR;
656
657 /* Returns non-zero upon success, 0 upon failure. */
658 if (PurgeComm(port->hdl, flags) == 0)
659 RETURN_FAIL("PurgeComm() failed");
660
661 if (buffers & SP_BUF_INPUT)
662 TRY(restart_wait(port));
663 #else
664 int flags = 0;
665 if (buffers == SP_BUF_BOTH)
666 flags = TCIOFLUSH;
667 else if (buffers == SP_BUF_INPUT)
668 flags = TCIFLUSH;
669 else if (buffers == SP_BUF_OUTPUT)
670 flags = TCOFLUSH;
671
672 /* Returns 0 upon success, -1 upon failure. */
673 if (tcflush(port->fd, flags) < 0)
674 RETURN_FAIL("tcflush() failed");
675 #endif
676 RETURN_OK();
677 }
678
679 SP_API enum sp_return sp_drain(struct sp_port *port)
680 {
681 TRACE("%p", port);
682
683 CHECK_OPEN_PORT();
684
685 DEBUG_FMT("Draining port %s", port->name);
686
687 #ifdef _WIN32
688 /* Returns non-zero upon success, 0 upon failure. */
689 if (FlushFileBuffers(port->hdl) == 0)
690 RETURN_FAIL("FlushFileBuffers() failed");
691 RETURN_OK();
692 #else
693 int result;
694 while (1) {
695 #ifdef __ANDROID__
696 int arg = 1;
697 result = ioctl(port->fd, TCSBRK, &arg);
698 #else
699 result = tcdrain(port->fd);
700 #endif
701 if (result < 0) {
702 if (errno == EINTR) {
703 DEBUG("tcdrain() was interrupted");
704 continue;
705 } else {
706 RETURN_FAIL("tcdrain() failed");
707 }
708 } else {
709 RETURN_OK();
710 }
711 }
712 #endif
713 }
714
715 SP_API enum sp_return sp_blocking_write(struct sp_port *port, const void *buf,
716 size_t count, unsigned int timeout)
717 {
718 TRACE("%p, %p, %d, %d", port, buf, count, timeout);
719
720 CHECK_OPEN_PORT();
721
722 if (!buf)
723 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
724
725 if (timeout)
726 DEBUG_FMT("Writing %d bytes to port %s, timeout %d ms",
727 count, port->name, timeout);
728 else
729 DEBUG_FMT("Writing %d bytes to port %s, no timeout",
730 count, port->name);
731
732 if (count == 0)
733 RETURN_INT(0);
734
735 #ifdef _WIN32
736 DWORD bytes_written = 0;
737 BOOL result;
738
739 /* Wait for previous non-blocking write to complete, if any. */
740 if (port->writing) {
741 DEBUG("Waiting for previous write to complete");
742 result = GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
743 port->writing = 0;
744 if (!result)
745 RETURN_FAIL("Previous write failed to complete");
746 DEBUG("Previous write completed");
747 }
748
749 /* Set timeout. */
750 port->timeouts.WriteTotalTimeoutConstant = timeout;
751 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
752 RETURN_FAIL("SetCommTimeouts() failed");
753
754 /* Start write. */
755 if (WriteFile(port->hdl, buf, count, NULL, &port->write_ovl) == 0) {
756 if (GetLastError() == ERROR_IO_PENDING) {
757 DEBUG("Waiting for write to complete");
758 GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
759 DEBUG_FMT("Write completed, %d/%d bytes written", bytes_written, count);
760 RETURN_INT(bytes_written);
761 } else {
762 RETURN_FAIL("WriteFile() failed");
763 }
764 } else {
765 DEBUG("Write completed immediately");
766 RETURN_INT(count);
767 }
768 #else
769 size_t bytes_written = 0;
770 unsigned char *ptr = (unsigned char *) buf;
771 struct timeval start, delta, now, end = {0, 0};
772 fd_set fds;
773 int result;
774
775 if (timeout) {
776 /* Get time at start of operation. */
777 gettimeofday(&start, NULL);
778 /* Define duration of timeout. */
779 delta.tv_sec = timeout / 1000;
780 delta.tv_usec = (timeout % 1000) * 1000;
781 /* Calculate time at which we should give up. */
782 timeradd(&start, &delta, &end);
783 }
784
785 /* Loop until we have written the requested number of bytes. */
786 while (bytes_written < count) {
787 /* Wait until space is available. */
788 FD_ZERO(&fds);
789 FD_SET(port->fd, &fds);
790 if (timeout) {
791 gettimeofday(&now, NULL);
792 if (timercmp(&now, &end, >)) {
793 DEBUG("Write timed out");
794 RETURN_INT(bytes_written);
795 }
796 timersub(&end, &now, &delta);
797 }
798 result = select(port->fd + 1, NULL, &fds, NULL, timeout ? &delta : NULL);
799 if (result < 0) {
800 if (errno == EINTR) {
801 DEBUG("select() call was interrupted, repeating");
802 continue;
803 } else {
804 RETURN_FAIL("select() failed");
805 }
806 } else if (result == 0) {
807 DEBUG("Write timed out");
808 RETURN_INT(bytes_written);
809 }
810
811 /* Do write. */
812 result = write(port->fd, ptr, count - bytes_written);
813
814 if (result < 0) {
815 if (errno == EAGAIN)
816 /* This shouldn't happen because we did a select() first, but handle anyway. */
817 continue;
818 else
819 /* This is an actual failure. */
820 RETURN_FAIL("write() failed");
821 }
822
823 bytes_written += result;
824 ptr += result;
825 }
826
827 RETURN_INT(bytes_written);
828 #endif
829 }
830
831 SP_API enum sp_return sp_nonblocking_write(struct sp_port *port,
832 const void *buf, size_t count)
833 {
834 TRACE("%p, %p, %d", port, buf, count);
835
836 CHECK_OPEN_PORT();
837
838 if (!buf)
839 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
840
841 DEBUG_FMT("Writing up to %d bytes to port %s", count, port->name);
842
843 if (count == 0)
844 RETURN_INT(0);
845
846 #ifdef _WIN32
847 DWORD written = 0;
848 BYTE *ptr = (BYTE *) buf;
849
850 /* Check whether previous write is complete. */
851 if (port->writing) {
852 if (HasOverlappedIoCompleted(&port->write_ovl)) {
853 DEBUG("Previous write completed");
854 port->writing = 0;
855 } else {
856 DEBUG("Previous write not complete");
857 /* Can't take a new write until the previous one finishes. */
858 RETURN_INT(0);
859 }
860 }
861
862 /* Set timeout. */
863 port->timeouts.WriteTotalTimeoutConstant = 0;
864 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
865 RETURN_FAIL("SetCommTimeouts() failed");
866
867 /*
868 * Keep writing data until the OS has to actually start an async IO
869 * for it. At that point we know the buffer is full.
870 */
871 while (written < count) {
872 /* Copy first byte of user buffer. */
873 port->pending_byte = *ptr++;
874
875 /* Start asynchronous write. */
876 if (WriteFile(port->hdl, &port->pending_byte, 1, NULL, &port->write_ovl) == 0) {
877 if (GetLastError() == ERROR_IO_PENDING) {
878 if (HasOverlappedIoCompleted(&port->write_ovl)) {
879 DEBUG("Asynchronous write completed immediately");
880 port->writing = 0;
881 written++;
882 continue;
883 } else {
884 DEBUG("Asynchronous write running");
885 port->writing = 1;
886 RETURN_INT(++written);
887 }
888 } else {
889 /* Actual failure of some kind. */
890 RETURN_FAIL("WriteFile() failed");
891 }
892 } else {
893 DEBUG("Single byte written immediately");
894 written++;
895 }
896 }
897
898 DEBUG("All bytes written immediately");
899
900 RETURN_INT(written);
901 #else
902 /* Returns the number of bytes written, or -1 upon failure. */
903 ssize_t written = write(port->fd, buf, count);
904
905 if (written < 0)
906 RETURN_FAIL("write() failed");
907 else
908 RETURN_INT(written);
909 #endif
910 }
911
912 SP_API enum sp_return sp_blocking_read(struct sp_port *port, void *buf,
913 size_t count, unsigned int timeout)
914 {
915 TRACE("%p, %p, %d, %d", port, buf, count, timeout);
916
917 CHECK_OPEN_PORT();
918
919 if (!buf)
920 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
921
922 if (timeout)
923 DEBUG_FMT("Reading %d bytes from port %s, timeout %d ms",
924 count, port->name, timeout);
925 else
926 DEBUG_FMT("Reading %d bytes from port %s, no timeout",
927 count, port->name);
928
929 if (count == 0)
930 RETURN_INT(0);
931
932 #ifdef _WIN32
933 DWORD bytes_read = 0;
934 DWORD bytes_remaining;
935 int ret;
936
937 /* Set timeout. */
938 port->timeouts.ReadIntervalTimeout = 0;
939 port->timeouts.ReadTotalTimeoutConstant = timeout;
940 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
941 RETURN_FAIL("SetCommTimeouts() failed");
942
943 /* Start read. */
944 if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0) {
945 if (GetLastError() == ERROR_IO_PENDING) {
946 DEBUG("Waiting for read to complete");
947 GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE);
948 DEBUG_FMT("Read completed, %d/%d bytes read", bytes_read, count);
949 } else {
950 RETURN_FAIL("ReadFile() failed");
951 }
952 } else {
953 DEBUG("Read completed immediately");
954 bytes_read = count;
955 }
956
957 ret = sp_input_waiting(port);
958
959 if (ret < 0)
960 RETURN_CODEVAL(ret);
961
962 bytes_remaining = ret;
963
964 /* Restart wait operation if buffer was emptied. */
965 if (bytes_read > 0 && bytes_remaining == 0)
966 TRY(restart_wait(port));
967
968 RETURN_INT(bytes_read);
969
970 #else
971 size_t bytes_read = 0;
972 unsigned char *ptr = (unsigned char *) buf;
973 struct timeval start, delta, now, end = {0, 0};
974 fd_set fds;
975 int result;
976
977 if (timeout) {
978 /* Get time at start of operation. */
979 gettimeofday(&start, NULL);
980 /* Define duration of timeout. */
981 delta.tv_sec = timeout / 1000;
982 delta.tv_usec = (timeout % 1000) * 1000;
983 /* Calculate time at which we should give up. */
984 timeradd(&start, &delta, &end);
985 }
986
987 /* Loop until we have the requested number of bytes. */
988 while (bytes_read < count) {
989 /* Wait until data is available. */
990 FD_ZERO(&fds);
991 FD_SET(port->fd, &fds);
992 if (timeout) {
993 gettimeofday(&now, NULL);
994 if (timercmp(&now, &end, >))
995 /* Timeout has expired. */
996 RETURN_INT(bytes_read);
997 timersub(&end, &now, &delta);
998 }
999 result = select(port->fd + 1, &fds, NULL, NULL, timeout ? &delta : NULL);
1000 if (result < 0) {
1001 if (errno == EINTR) {
1002 DEBUG("select() call was interrupted, repeating");
1003 continue;
1004 } else {
1005 RETURN_FAIL("select() failed");
1006 }
1007 } else if (result == 0) {
1008 DEBUG("Read timed out");
1009 RETURN_INT(bytes_read);
1010 }
1011
1012 /* Do read. */
1013 result = read(port->fd, ptr, count - bytes_read);
1014
1015 if (result < 0) {
1016 if (errno == EAGAIN)
1017 /* This shouldn't happen because we did a select() first, but handle anyway. */
1018 continue;
1019 else
1020 /* This is an actual failure. */
1021 RETURN_FAIL("read() failed");
1022 }
1023
1024 bytes_read += result;
1025 ptr += result;
1026 }
1027
1028 RETURN_INT(bytes_read);
1029 #endif
1030 }
1031
1032 SP_API enum sp_return sp_nonblocking_read(struct sp_port *port, void *buf,
1033 size_t count)
1034 {
1035 TRACE("%p, %p, %d", port, buf, count);
1036
1037 CHECK_OPEN_PORT();
1038
1039 if (!buf)
1040 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
1041
1042 DEBUG_FMT("Reading up to %d bytes from port %s", count, port->name);
1043
1044 #ifdef _WIN32
1045 DWORD bytes_read;
1046 DWORD bytes_remaining;
1047 int ret;
1048
1049 /* Set timeout. */
1050 port->timeouts.ReadIntervalTimeout = MAXDWORD;
1051 port->timeouts.ReadTotalTimeoutConstant = 0;
1052 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
1053 RETURN_FAIL("SetCommTimeouts() failed");
1054
1055 /* Do read. */
1056 if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0)
1057 RETURN_FAIL("ReadFile() failed");
1058
1059 /* Get number of bytes read. */
1060 if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0)
1061 RETURN_FAIL("GetOverlappedResult() failed");
1062
1063 ret = sp_input_waiting(port);
1064
1065 if (ret < 0)
1066 RETURN_CODEVAL(ret);
1067
1068 bytes_remaining = ret;
1069
1070 /* Restart wait operation if buffer was emptied. */
1071 if (bytes_read > 0 && bytes_remaining == 0)
1072 TRY(restart_wait(port));
1073
1074 RETURN_INT(bytes_read);
1075 #else
1076 ssize_t bytes_read;
1077
1078 /* Returns the number of bytes read, or -1 upon failure. */
1079 if ((bytes_read = read(port->fd, buf, count)) < 0) {
1080 if (errno == EAGAIN)
1081 /* No bytes available. */
1082 bytes_read = 0;
1083 else
1084 /* This is an actual failure. */
1085 RETURN_FAIL("read() failed");
1086 }
1087 RETURN_INT(bytes_read);
1088 #endif
1089 }
1090
1091 SP_API enum sp_return sp_input_waiting(struct sp_port *port)
1092 {
1093 TRACE("%p", port);
1094
1095 CHECK_OPEN_PORT();
1096
1097 DEBUG_FMT("Checking input bytes waiting on port %s", port->name);
1098
1099 #ifdef _WIN32
1100 DWORD errors;
1101 COMSTAT comstat;
1102
1103 if (ClearCommError(port->hdl, &errors, &comstat) == 0)
1104 RETURN_FAIL("ClearCommError() failed");
1105 RETURN_INT(comstat.cbInQue);
1106 #else
1107 int bytes_waiting;
1108 if (ioctl(port->fd, TIOCINQ, &bytes_waiting) < 0)
1109 RETURN_FAIL("TIOCINQ ioctl failed");
1110 RETURN_INT(bytes_waiting);
1111 #endif
1112 }
1113
1114 SP_API enum sp_return sp_output_waiting(struct sp_port *port)
1115 {
1116 TRACE("%p", port);
1117
1118 CHECK_OPEN_PORT();
1119
1120 DEBUG_FMT("Checking output bytes waiting on port %s", port->name);
1121
1122 #ifdef _WIN32
1123 DWORD errors;
1124 COMSTAT comstat;
1125
1126 if (ClearCommError(port->hdl, &errors, &comstat) == 0)
1127 RETURN_FAIL("ClearCommError() failed");
1128 RETURN_INT(comstat.cbOutQue);
1129 #else
1130 int bytes_waiting;
1131 if (ioctl(port->fd, TIOCOUTQ, &bytes_waiting) < 0)
1132 RETURN_FAIL("TIOCOUTQ ioctl failed");
1133 RETURN_INT(bytes_waiting);
1134 #endif
1135 }
1136
1137 SP_API enum sp_return sp_new_event_set(struct sp_event_set **result_ptr)
1138 {
1139 struct sp_event_set *result;
1140
1141 TRACE("%p", result_ptr);
1142
1143 if (!result_ptr)
1144 RETURN_ERROR(SP_ERR_ARG, "Null result");
1145
1146 *result_ptr = NULL;
1147
1148 if (!(result = malloc(sizeof(struct sp_event_set))))
1149 RETURN_ERROR(SP_ERR_MEM, "sp_event_set malloc() failed");
1150
1151 memset(result, 0, sizeof(struct sp_event_set));
1152
1153 *result_ptr = result;
1154
1155 RETURN_OK();
1156 }
1157
1158 static enum sp_return add_handle(struct sp_event_set *event_set,
1159 event_handle handle, enum sp_event mask)
1160 {
1161 void *new_handles;
1162 enum sp_event *new_masks;
1163
1164 TRACE("%p, %d, %d", event_set, handle, mask);
1165
1166 if (!(new_handles = realloc(event_set->handles,
1167 sizeof(event_handle) * (event_set->count + 1))))
1168 RETURN_ERROR(SP_ERR_MEM, "Handle array realloc() failed");
1169
1170 event_set->handles = new_handles;
1171
1172 if (!(new_masks = realloc(event_set->masks,
1173 sizeof(enum sp_event) * (event_set->count + 1))))
1174 RETURN_ERROR(SP_ERR_MEM, "Mask array realloc() failed");
1175
1176 event_set->masks = new_masks;
1177
1178 ((event_handle *) event_set->handles)[event_set->count] = handle;
1179 event_set->masks[event_set->count] = mask;
1180
1181 event_set->count++;
1182
1183 RETURN_OK();
1184 }
1185
1186 SP_API enum sp_return sp_add_port_events(struct sp_event_set *event_set,
1187 const struct sp_port *port, enum sp_event mask)
1188 {
1189 TRACE("%p, %p, %d", event_set, port, mask);
1190
1191 if (!event_set)
1192 RETURN_ERROR(SP_ERR_ARG, "Null event set");
1193
1194 if (!port)
1195 RETURN_ERROR(SP_ERR_ARG, "Null port");
1196
1197 if (mask > (SP_EVENT_RX_READY | SP_EVENT_TX_READY | SP_EVENT_ERROR))
1198 RETURN_ERROR(SP_ERR_ARG, "Invalid event mask");
1199
1200 if (!mask)
1201 RETURN_OK();
1202
1203 #ifdef _WIN32
1204 enum sp_event handle_mask;
1205 if ((handle_mask = mask & SP_EVENT_TX_READY))
1206 TRY(add_handle(event_set, port->write_ovl.hEvent, handle_mask));
1207 if ((handle_mask = mask & (SP_EVENT_RX_READY | SP_EVENT_ERROR)))
1208 TRY(add_handle(event_set, port->wait_ovl.hEvent, handle_mask));
1209 #else
1210 TRY(add_handle(event_set, port->fd, mask));
1211 #endif
1212
1213 RETURN_OK();
1214 }
1215
1216 SP_API void sp_free_event_set(struct sp_event_set *event_set)
1217 {
1218 TRACE("%p", event_set);
1219
1220 if (!event_set) {
1221 DEBUG("Null event set");
1222 RETURN();
1223 }
1224
1225 DEBUG("Freeing event set");
1226
1227 if (event_set->handles)
1228 free(event_set->handles);
1229 if (event_set->masks)
1230 free(event_set->masks);
1231
1232 free(event_set);
1233
1234 RETURN();
1235 }
1236
1237 SP_API enum sp_return sp_wait(struct sp_event_set *event_set,
1238 unsigned int timeout)
1239 {
1240 TRACE("%p, %d", event_set, timeout);
1241
1242 if (!event_set)
1243 RETURN_ERROR(SP_ERR_ARG, "Null event set");
1244
1245 #ifdef _WIN32
1246 if (WaitForMultipleObjects(event_set->count, event_set->handles, FALSE,
1247 timeout ? timeout : INFINITE) == WAIT_FAILED)
1248 RETURN_FAIL("WaitForMultipleObjects() failed");
1249
1250 RETURN_OK();
1251 #else
1252 struct timeval start, delta, now, end = {0, 0};
1253 int result, timeout_remaining;
1254 struct pollfd *pollfds;
1255 unsigned int i;
1256
1257 if (!(pollfds = malloc(sizeof(struct pollfd) * event_set->count)))
1258 RETURN_ERROR(SP_ERR_MEM, "pollfds malloc() failed");
1259
1260 for (i = 0; i < event_set->count; i++) {
1261 pollfds[i].fd = ((int *) event_set->handles)[i];
1262 pollfds[i].events = 0;
1263 pollfds[i].revents = 0;
1264 if (event_set->masks[i] & SP_EVENT_RX_READY)
1265 pollfds[i].events |= POLLIN;
1266 if (event_set->masks[i] & SP_EVENT_TX_READY)
1267 pollfds[i].events |= POLLOUT;
1268 if (event_set->masks[i] & SP_EVENT_ERROR)
1269 pollfds[i].events |= POLLERR;
1270 }
1271
1272 if (timeout) {
1273 /* Get time at start of operation. */
1274 gettimeofday(&start, NULL);
1275 /* Define duration of timeout. */
1276 delta.tv_sec = timeout / 1000;
1277 delta.tv_usec = (timeout % 1000) * 1000;
1278 /* Calculate time at which we should give up. */
1279 timeradd(&start, &delta, &end);
1280 }
1281
1282 /* Loop until an event occurs. */
1283 while (1) {
1284 if (timeout) {
1285 gettimeofday(&now, NULL);
1286 if (timercmp(&now, &end, >)) {
1287 DEBUG("Wait timed out");
1288 break;
1289 }
1290 timersub(&end, &now, &delta);
1291 timeout_remaining = delta.tv_sec * 1000 + delta.tv_usec / 1000;
1292 }
1293
1294 result = poll(pollfds, event_set->count, timeout ? timeout_remaining : -1);
1295
1296 if (result < 0) {
1297 if (errno == EINTR) {
1298 DEBUG("poll() call was interrupted, repeating");
1299 continue;
1300 } else {
1301 free(pollfds);
1302 RETURN_FAIL("poll() failed");
1303 }
1304 } else if (result == 0) {
1305 DEBUG("poll() timed out");
1306 break;
1307 } else {
1308 DEBUG("poll() completed");
1309 break;
1310 }
1311 }
1312
1313 free(pollfds);
1314 RETURN_OK();
1315 #endif
1316 }
1317
1318 #ifdef USE_TERMIOS_SPEED
1319 static enum sp_return get_baudrate(int fd, int *baudrate)
1320 {
1321 void *data;
1322
1323 TRACE("%d, %p", fd, baudrate);
1324
1325 DEBUG("Getting baud rate");
1326
1327 if (!(data = malloc(get_termios_size())))
1328 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
1329
1330 if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1331 free(data);
1332 RETURN_FAIL("Getting termios failed");
1333 }
1334
1335 *baudrate = get_termios_speed(data);
1336
1337 free(data);
1338
1339 RETURN_OK();
1340 }
1341
1342 static enum sp_return set_baudrate(int fd, int baudrate)
1343 {
1344 void *data;
1345
1346 TRACE("%d, %d", fd, baudrate);
1347
1348 DEBUG("Getting baud rate");
1349
1350 if (!(data = malloc(get_termios_size())))
1351 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
1352
1353 if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1354 free(data);
1355 RETURN_FAIL("Getting termios failed");
1356 }
1357
1358 DEBUG("Setting baud rate");
1359
1360 set_termios_speed(data, baudrate);
1361
1362 if (ioctl(fd, get_termios_set_ioctl(), data) < 0) {
1363 free(data);
1364 RETURN_FAIL("Setting termios failed");
1365 }
1366
1367 free(data);
1368
1369 RETURN_OK();
1370 }
1371 #endif /* USE_TERMIOS_SPEED */
1372
1373 #ifdef USE_TERMIOX
1374 static enum sp_return get_flow(int fd, struct port_data *data)
1375 {
1376 void *termx;
1377
1378 TRACE("%d, %p", fd, data);
1379
1380 DEBUG("Getting advanced flow control");
1381
1382 if (!(termx = malloc(get_termiox_size())))
1383 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
1384
1385 if (ioctl(fd, TCGETX, termx) < 0) {
1386 free(termx);
1387 RETURN_FAIL("Getting termiox failed");
1388 }
1389
1390 get_termiox_flow(termx, &data->rts_flow, &data->cts_flow,
1391 &data->dtr_flow, &data->dsr_flow);
1392
1393 free(termx);
1394
1395 RETURN_OK();
1396 }
1397
1398 static enum sp_return set_flow(int fd, struct port_data *data)
1399 {
1400 void *termx;
1401
1402 TRACE("%d, %p", fd, data);
1403
1404 DEBUG("Getting advanced flow control");
1405
1406 if (!(termx = malloc(get_termiox_size())))
1407 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
1408
1409 if (ioctl(fd, TCGETX, termx) < 0) {
1410 free(termx);
1411 RETURN_FAIL("Getting termiox failed");
1412 }
1413
1414 DEBUG("Setting advanced flow control");
1415
1416 set_termiox_flow(termx, data->rts_flow, data->cts_flow,
1417 data->dtr_flow, data->dsr_flow);
1418
1419 if (ioctl(fd, TCSETX, termx) < 0) {
1420 free(termx);
1421 RETURN_FAIL("Setting termiox failed");
1422 }
1423
1424 free(termx);
1425
1426 RETURN_OK();
1427 }
1428 #endif /* USE_TERMIOX */
1429
1430 static enum sp_return get_config(struct sp_port *port, struct port_data *data,
1431 struct sp_port_config *config)
1432 {
1433 unsigned int i;
1434
1435 TRACE("%p, %p, %p", port, data, config);
1436
1437 DEBUG_FMT("Getting configuration for port %s", port->name);
1438
1439 #ifdef _WIN32
1440 if (!GetCommState(port->hdl, &data->dcb))
1441 RETURN_FAIL("GetCommState() failed");
1442
1443 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1444 if (data->dcb.BaudRate == std_baudrates[i].index) {
1445 config->baudrate = std_baudrates[i].value;
1446 break;
1447 }
1448 }
1449
1450 if (i == NUM_STD_BAUDRATES)
1451 /* BaudRate field can be either an index or a custom baud rate. */
1452 config->baudrate = data->dcb.BaudRate;
1453
1454 config->bits = data->dcb.ByteSize;
1455
1456 if (data->dcb.fParity)
1457 switch (data->dcb.Parity) {
1458 case NOPARITY:
1459 config->parity = SP_PARITY_NONE;
1460 break;
1461 case ODDPARITY:
1462 config->parity = SP_PARITY_ODD;
1463 break;
1464 case EVENPARITY:
1465 config->parity = SP_PARITY_EVEN;
1466 break;
1467 case MARKPARITY:
1468 config->parity = SP_PARITY_MARK;
1469 break;
1470 case SPACEPARITY:
1471 config->parity = SP_PARITY_SPACE;
1472 break;
1473 default:
1474 config->parity = -1;
1475 }
1476 else
1477 config->parity = SP_PARITY_NONE;
1478
1479 switch (data->dcb.StopBits) {
1480 case ONESTOPBIT:
1481 config->stopbits = 1;
1482 break;
1483 case TWOSTOPBITS:
1484 config->stopbits = 2;
1485 break;
1486 default:
1487 config->stopbits = -1;
1488 }
1489
1490 switch (data->dcb.fRtsControl) {
1491 case RTS_CONTROL_DISABLE:
1492 config->rts = SP_RTS_OFF;
1493 break;
1494 case RTS_CONTROL_ENABLE:
1495 config->rts = SP_RTS_ON;
1496 break;
1497 case RTS_CONTROL_HANDSHAKE:
1498 config->rts = SP_RTS_FLOW_CONTROL;
1499 break;
1500 default:
1501 config->rts = -1;
1502 }
1503
1504 config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
1505
1506 switch (data->dcb.fDtrControl) {
1507 case DTR_CONTROL_DISABLE:
1508 config->dtr = SP_DTR_OFF;
1509 break;
1510 case DTR_CONTROL_ENABLE:
1511 config->dtr = SP_DTR_ON;
1512 break;
1513 case DTR_CONTROL_HANDSHAKE:
1514 config->dtr = SP_DTR_FLOW_CONTROL;
1515 break;
1516 default:
1517 config->dtr = -1;
1518 }
1519
1520 config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
1521
1522 if (data->dcb.fInX) {
1523 if (data->dcb.fOutX)
1524 config->xon_xoff = SP_XONXOFF_INOUT;
1525 else
1526 config->xon_xoff = SP_XONXOFF_IN;
1527 } else {
1528 if (data->dcb.fOutX)
1529 config->xon_xoff = SP_XONXOFF_OUT;
1530 else
1531 config->xon_xoff = SP_XONXOFF_DISABLED;
1532 }
1533
1534 #else // !_WIN32
1535
1536 if (tcgetattr(port->fd, &data->term) < 0)
1537 RETURN_FAIL("tcgetattr() failed");
1538
1539 if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
1540 RETURN_FAIL("TIOCMGET ioctl failed");
1541
1542 #ifdef USE_TERMIOX
1543 int ret = get_flow(port->fd, data);
1544
1545 if (ret == SP_ERR_FAIL && errno == EINVAL)
1546 data->termiox_supported = 0;
1547 else if (ret < 0)
1548 RETURN_CODEVAL(ret);
1549 else
1550 data->termiox_supported = 1;
1551 #else
1552 data->termiox_supported = 0;
1553 #endif
1554
1555 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1556 if (cfgetispeed(&data->term) == std_baudrates[i].index) {
1557 config->baudrate = std_baudrates[i].value;
1558 break;
1559 }
1560 }
1561
1562 if (i == NUM_STD_BAUDRATES) {
1563 #ifdef __APPLE__
1564 config->baudrate = (int)data->term.c_ispeed;
1565 #elif defined(USE_TERMIOS_SPEED)
1566 TRY(get_baudrate(port->fd, &config->baudrate));
1567 #else
1568 config->baudrate = -1;
1569 #endif
1570 }
1571
1572 switch (data->term.c_cflag & CSIZE) {
1573 case CS8:
1574 config->bits = 8;
1575 break;
1576 case CS7:
1577 config->bits = 7;
1578 break;
1579 case CS6:
1580 config->bits = 6;
1581 break;
1582 case CS5:
1583 config->bits = 5;
1584 break;
1585 default:
1586 config->bits = -1;
1587 }
1588
1589 if (!(data->term.c_cflag & PARENB) && (data->term.c_iflag & IGNPAR))
1590 config->parity = SP_PARITY_NONE;
1591 else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR))
1592 config->parity = -1;
1593 #ifdef CMSPAR
1594 else if (data->term.c_cflag & CMSPAR)
1595 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_MARK : SP_PARITY_SPACE;
1596 #endif
1597 else
1598 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
1599
1600 config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1;
1601
1602 if (data->term.c_cflag & CRTSCTS) {
1603 config->rts = SP_RTS_FLOW_CONTROL;
1604 config->cts = SP_CTS_FLOW_CONTROL;
1605 } else {
1606 if (data->termiox_supported && data->rts_flow)
1607 config->rts = SP_RTS_FLOW_CONTROL;
1608 else
1609 config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
1610
1611 config->cts = (data->termiox_supported && data->cts_flow) ?
1612 SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
1613 }
1614
1615 if (data->termiox_supported && data->dtr_flow)
1616 config->dtr = SP_DTR_FLOW_CONTROL;
1617 else
1618 config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
1619
1620 config->dsr = (data->termiox_supported && data->dsr_flow) ?
1621 SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
1622
1623 if (data->term.c_iflag & IXOFF) {
1624 if (data->term.c_iflag & IXON)
1625 config->xon_xoff = SP_XONXOFF_INOUT;
1626 else
1627 config->xon_xoff = SP_XONXOFF_IN;
1628 } else {
1629 if (data->term.c_iflag & IXON)
1630 config->xon_xoff = SP_XONXOFF_OUT;
1631 else
1632 config->xon_xoff = SP_XONXOFF_DISABLED;
1633 }
1634 #endif
1635
1636 RETURN_OK();
1637 }
1638
1639 static enum sp_return set_config(struct sp_port *port, struct port_data *data,
1640 const struct sp_port_config *config)
1641 {
1642 unsigned int i;
1643 #ifdef __APPLE__
1644 BAUD_TYPE baud_nonstd;
1645
1646 baud_nonstd = B0;
1647 #endif
1648 #ifdef USE_TERMIOS_SPEED
1649 int baud_nonstd = 0;
1650 #endif
1651
1652 TRACE("%p, %p, %p", port, data, config);
1653
1654 DEBUG_FMT("Setting configuration for port %s", port->name);
1655
1656 #ifdef _WIN32
1657 if (config->baudrate >= 0) {
1658 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1659 if (config->baudrate == std_baudrates[i].value) {
1660 data->dcb.BaudRate = std_baudrates[i].index;
1661 break;
1662 }
1663 }
1664
1665 if (i == NUM_STD_BAUDRATES)
1666 data->dcb.BaudRate = config->baudrate;
1667 }
1668
1669 if (config->bits >= 0)
1670 data->dcb.ByteSize = config->bits;
1671
1672 if (config->parity >= 0) {
1673 switch (config->parity) {
1674 case SP_PARITY_NONE:
1675 data->dcb.Parity = NOPARITY;
1676 break;
1677 case SP_PARITY_ODD:
1678 data->dcb.Parity = ODDPARITY;
1679 break;
1680 case SP_PARITY_EVEN:
1681 data->dcb.Parity = EVENPARITY;
1682 break;
1683 case SP_PARITY_MARK:
1684 data->dcb.Parity = MARKPARITY;
1685 break;
1686 case SP_PARITY_SPACE:
1687 data->dcb.Parity = SPACEPARITY;
1688 break;
1689 default:
1690 RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
1691 }
1692 }
1693
1694 if (config->stopbits >= 0) {
1695 switch (config->stopbits) {
1696 /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
1697 case 1:
1698 data->dcb.StopBits = ONESTOPBIT;
1699 break;
1700 case 2:
1701 data->dcb.StopBits = TWOSTOPBITS;
1702 break;
1703 default:
1704 RETURN_ERROR(SP_ERR_ARG, "Invalid stop bit setting");
1705 }
1706 }
1707
1708 if (config->rts >= 0) {
1709 switch (config->rts) {
1710 case SP_RTS_OFF:
1711 data->dcb.fRtsControl = RTS_CONTROL_DISABLE;
1712 break;
1713 case SP_RTS_ON:
1714 data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
1715 break;
1716 case SP_RTS_FLOW_CONTROL:
1717 data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
1718 break;
1719 default:
1720 RETURN_ERROR(SP_ERR_ARG, "Invalid RTS setting");
1721 }
1722 }
1723
1724 if (config->cts >= 0) {
1725 switch (config->cts) {
1726 case SP_CTS_IGNORE:
1727 data->dcb.fOutxCtsFlow = FALSE;
1728 break;
1729 case SP_CTS_FLOW_CONTROL:
1730 data->dcb.fOutxCtsFlow = TRUE;
1731 break;
1732 default:
1733 RETURN_ERROR(SP_ERR_ARG, "Invalid CTS setting");
1734 }
1735 }
1736
1737 if (config->dtr >= 0) {
1738 switch (config->dtr) {
1739 case SP_DTR_OFF:
1740 data->dcb.fDtrControl = DTR_CONTROL_DISABLE;
1741 break;
1742 case SP_DTR_ON:
1743 data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
1744 break;
1745 case SP_DTR_FLOW_CONTROL:
1746 data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
1747 break;
1748 default:
1749 RETURN_ERROR(SP_ERR_ARG, "Invalid DTR setting");
1750 }
1751 }
1752
1753 if (config->dsr >= 0) {
1754 switch (config->dsr) {
1755 case SP_DSR_IGNORE:
1756 data->dcb.fOutxDsrFlow = FALSE;
1757 break;
1758 case SP_DSR_FLOW_CONTROL:
1759 data->dcb.fOutxDsrFlow = TRUE;
1760 break;
1761 default:
1762 RETURN_ERROR(SP_ERR_ARG, "Invalid DSR setting");
1763 }
1764 }
1765
1766 if (config->xon_xoff >= 0) {
1767 switch (config->xon_xoff) {
1768 case SP_XONXOFF_DISABLED:
1769 data->dcb.fInX = FALSE;
1770 data->dcb.fOutX = FALSE;
1771 break;
1772 case SP_XONXOFF_IN:
1773 data->dcb.fInX = TRUE;
1774 data->dcb.fOutX = FALSE;
1775 break;
1776 case SP_XONXOFF_OUT:
1777 data->dcb.fInX = FALSE;
1778 data->dcb.fOutX = TRUE;
1779 break;
1780 case SP_XONXOFF_INOUT:
1781 data->dcb.fInX = TRUE;
1782 data->dcb.fOutX = TRUE;
1783 break;
1784 default:
1785 RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
1786 }
1787 }
1788
1789 if (!SetCommState(port->hdl, &data->dcb))
1790 RETURN_FAIL("SetCommState() failed");
1791
1792 #else /* !_WIN32 */
1793
1794 int controlbits;
1795
1796 if (config->baudrate >= 0) {
1797 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1798 if (config->baudrate == std_baudrates[i].value) {
1799 if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
1800 RETURN_FAIL("cfsetospeed() failed");
1801
1802 if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
1803 RETURN_FAIL("cfsetispeed() failed");
1804 break;
1805 }
1806 }
1807
1808 /* Non-standard baud rate */
1809 if (i == NUM_STD_BAUDRATES) {
1810 #ifdef __APPLE__
1811 /* Set "dummy" baud rate. */
1812 if (cfsetspeed(&data->term, B9600) < 0)
1813 RETURN_FAIL("cfsetspeed() failed");
1814 baud_nonstd = config->baudrate;
1815 #elif defined(USE_TERMIOS_SPEED)
1816 baud_nonstd = 1;
1817 #else
1818 RETURN_ERROR(SP_ERR_SUPP, "Non-standard baudrate not supported");
1819 #endif
1820 }
1821 }
1822
1823 if (config->bits >= 0) {
1824 data->term.c_cflag &= ~CSIZE;
1825 switch (config->bits) {
1826 case 8:
1827 data->term.c_cflag |= CS8;
1828 break;
1829 case 7:
1830 data->term.c_cflag |= CS7;
1831 break;
1832 case 6:
1833 data->term.c_cflag |= CS6;
1834 break;
1835 case 5:
1836 data->term.c_cflag |= CS5;
1837 break;
1838 default:
1839 RETURN_ERROR(SP_ERR_ARG, "Invalid data bits setting");
1840 }
1841 }
1842
1843 if (config->parity >= 0) {
1844 data->term.c_iflag &= ~IGNPAR;
1845 data->term.c_cflag &= ~(PARENB | PARODD);
1846 #ifdef CMSPAR
1847 data->term.c_cflag &= ~CMSPAR;
1848 #endif
1849 switch (config->parity) {
1850 case SP_PARITY_NONE:
1851 data->term.c_iflag |= IGNPAR;
1852 break;
1853 case SP_PARITY_EVEN:
1854 data->term.c_cflag |= PARENB;
1855 break;
1856 case SP_PARITY_ODD:
1857 data->term.c_cflag |= PARENB | PARODD;
1858 break;
1859 #ifdef CMSPAR
1860 case SP_PARITY_MARK:
1861 data->term.c_cflag |= PARENB | PARODD;
1862 data->term.c_cflag |= CMSPAR;
1863 break;
1864 case SP_PARITY_SPACE:
1865 data->term.c_cflag |= PARENB;
1866 data->term.c_cflag |= CMSPAR;
1867 break;
1868 #else
1869 case SP_PARITY_MARK:
1870 case SP_PARITY_SPACE:
1871 RETURN_ERROR(SP_ERR_SUPP, "Mark/space parity not supported");
1872 #endif
1873 default:
1874 RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
1875 }
1876 }
1877
1878 if (config->stopbits >= 0) {
1879 data->term.c_cflag &= ~CSTOPB;
1880 switch (config->stopbits) {
1881 case 1:
1882 data->term.c_cflag &= ~CSTOPB;
1883 break;
1884 case 2:
1885 data->term.c_cflag |= CSTOPB;
1886 break;
1887 default:
1888 RETURN_ERROR(SP_ERR_ARG, "Invalid stop bits setting");
1889 }
1890 }
1891
1892 if (config->rts >= 0 || config->cts >= 0) {
1893 if (data->termiox_supported) {
1894 data->rts_flow = data->cts_flow = 0;
1895 switch (config->rts) {
1896 case SP_RTS_OFF:
1897 case SP_RTS_ON:
1898 controlbits = TIOCM_RTS;
1899 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
1900 RETURN_FAIL("Setting RTS signal level failed");
1901 break;
1902 case SP_RTS_FLOW_CONTROL:
1903 data->rts_flow = 1;
1904 break;
1905 default:
1906 break;
1907 }
1908 if (config->cts == SP_CTS_FLOW_CONTROL)
1909 data->cts_flow = 1;
1910
1911 if (data->rts_flow && data->cts_flow)
1912 data->term.c_iflag |= CRTSCTS;
1913 else
1914 data->term.c_iflag &= ~CRTSCTS;
1915 } else {
1916 /* Asymmetric use of RTS/CTS not supported. */
1917 if (data->term.c_iflag & CRTSCTS) {
1918 /* Flow control can only be disabled for both RTS & CTS together. */
1919 if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
1920 if (config->cts != SP_CTS_IGNORE)
1921 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
1922 }
1923 if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
1924 if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
1925 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
1926 }
1927 } else {
1928 /* Flow control can only be enabled for both RTS & CTS together. */
1929 if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
1930 ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
1931 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be enabled together");
1932 }
1933
1934 if (config->rts >= 0) {
1935 if (config->rts == SP_RTS_FLOW_CONTROL) {
1936 data->term.c_iflag |= CRTSCTS;
1937 } else {
1938 controlbits = TIOCM_RTS;
1939 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
1940 &controlbits) < 0)
1941 RETURN_FAIL("Setting RTS signal level failed");
1942 }
1943 }
1944 }
1945 }
1946
1947 if (config->dtr >= 0 || config->dsr >= 0) {
1948 if (data->termiox_supported) {
1949 data->dtr_flow = data->dsr_flow = 0;
1950 switch (config->dtr) {
1951 case SP_DTR_OFF:
1952 case SP_DTR_ON:
1953 controlbits = TIOCM_DTR;
1954 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
1955 RETURN_FAIL("Setting DTR signal level failed");
1956 break;
1957 case SP_DTR_FLOW_CONTROL:
1958 data->dtr_flow = 1;
1959 break;
1960 default:
1961 break;
1962 }
1963 if (config->dsr == SP_DSR_FLOW_CONTROL)
1964 data->dsr_flow = 1;
1965 } else {
1966 /* DTR/DSR flow control not supported. */
1967 if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
1968 RETURN_ERROR(SP_ERR_SUPP, "DTR/DSR flow control not supported");
1969
1970 if (config->dtr >= 0) {
1971 controlbits = TIOCM_DTR;
1972 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
1973 &controlbits) < 0)
1974 RETURN_FAIL("Setting DTR signal level failed");
1975 }
1976 }
1977 }
1978
1979 if (config->xon_xoff >= 0) {
1980 data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
1981 switch (config->xon_xoff) {
1982 case SP_XONXOFF_DISABLED:
1983 break;
1984 case SP_XONXOFF_IN:
1985 data->term.c_iflag |= IXOFF;
1986 break;
1987 case SP_XONXOFF_OUT:
1988 data->term.c_iflag |= IXON | IXANY;
1989 break;
1990 case SP_XONXOFF_INOUT:
1991 data->term.c_iflag |= IXON | IXOFF | IXANY;
1992 break;
1993 default:
1994 RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
1995 }
1996 }
1997
1998 if (tcsetattr(port->fd, TCSANOW, &data->term) < 0)
1999 RETURN_FAIL("tcsetattr() failed");
2000
2001 #ifdef __APPLE__
2002 if (baud_nonstd != B0) {
2003 if (ioctl(port->fd, IOSSIOSPEED, &baud_nonstd) == -1)
2004 RETURN_FAIL("IOSSIOSPEED ioctl failed");
2005 /*
2006 * Set baud rates in data->term to correct, but incompatible
2007 * with tcsetattr() value, same as delivered by tcgetattr().
2008 */
2009 if (cfsetspeed(&data->term, baud_nonstd) < 0)
2010 RETURN_FAIL("cfsetspeed() failed");
2011 }
2012 #elif defined(__linux__)
2013 #ifdef USE_TERMIOS_SPEED
2014 if (baud_nonstd)
2015 TRY(set_baudrate(port->fd, config->baudrate));
2016 #endif
2017 #ifdef USE_TERMIOX
2018 if (data->termiox_supported)
2019 TRY(set_flow(port->fd, data));
2020 #endif
2021 #endif
2022
2023 #endif /* !_WIN32 */
2024
2025 RETURN_OK();
2026 }
2027
2028 SP_API enum sp_return sp_new_config(struct sp_port_config **config_ptr)
2029 {
2030 struct sp_port_config *config;
2031
2032 TRACE("%p", config_ptr);
2033
2034 if (!config_ptr)
2035 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
2036
2037 *config_ptr = NULL;
2038
2039 if (!(config = malloc(sizeof(struct sp_port_config))))
2040 RETURN_ERROR(SP_ERR_MEM, "Config malloc failed");
2041
2042 config->baudrate = -1;
2043 config->bits = -1;
2044 config->parity = -1;
2045 config->stopbits = -1;
2046 config->rts = -1;
2047 config->cts = -1;
2048 config->dtr = -1;
2049 config->dsr = -1;
2050
2051 *config_ptr = config;
2052
2053 RETURN_OK();
2054 }
2055
2056 SP_API void sp_free_config(struct sp_port_config *config)
2057 {
2058 TRACE("%p", config);
2059
2060 if (!config)
2061 DEBUG("Null config");
2062 else
2063 free(config);
2064
2065 RETURN();
2066 }
2067
2068 SP_API enum sp_return sp_get_config(struct sp_port *port,
2069 struct sp_port_config *config)
2070 {
2071 struct port_data data;
2072
2073 TRACE("%p, %p", port, config);
2074
2075 CHECK_OPEN_PORT();
2076
2077 if (!config)
2078 RETURN_ERROR(SP_ERR_ARG, "Null config");
2079
2080 TRY(get_config(port, &data, config));
2081
2082 RETURN_OK();
2083 }
2084
2085 SP_API enum sp_return sp_set_config(struct sp_port *port,
2086 const struct sp_port_config *config)
2087 {
2088 struct port_data data;
2089 struct sp_port_config prev_config;
2090
2091 TRACE("%p, %p", port, config);
2092
2093 CHECK_OPEN_PORT();
2094
2095 if (!config)
2096 RETURN_ERROR(SP_ERR_ARG, "Null config");
2097
2098 TRY(get_config(port, &data, &prev_config));
2099 TRY(set_config(port, &data, config));
2100
2101 RETURN_OK();
2102 }
2103
2104 #define CREATE_ACCESSORS(x, type) \
2105 SP_API enum sp_return sp_set_##x(struct sp_port *port, type x) { \
2106 struct port_data data; \
2107 struct sp_port_config config; \
2108 TRACE("%p, %d", port, x); \
2109 CHECK_OPEN_PORT(); \
2110 TRY(get_config(port, &data, &config)); \
2111 config.x = x; \
2112 TRY(set_config(port, &data, &config)); \
2113 RETURN_OK(); \
2114 } \
2115 SP_API enum sp_return sp_get_config_##x(const struct sp_port_config *config, \
2116 type *x) { \
2117 TRACE("%p, %p", config, x); \
2118 if (!config) \
2119 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
2120 *x = config->x; \
2121 RETURN_OK(); \
2122 } \
2123 SP_API enum sp_return sp_set_config_##x(struct sp_port_config *config, \
2124 type x) { \
2125 TRACE("%p, %d", config, x); \
2126 if (!config) \
2127 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
2128 config->x = x; \
2129 RETURN_OK(); \
2130 }
2131
2132 CREATE_ACCESSORS(baudrate, int)
2133 CREATE_ACCESSORS(bits, int)
2134 CREATE_ACCESSORS(parity, enum sp_parity)
2135 CREATE_ACCESSORS(stopbits, int)
2136 CREATE_ACCESSORS(rts, enum sp_rts)
2137 CREATE_ACCESSORS(cts, enum sp_cts)
2138 CREATE_ACCESSORS(dtr, enum sp_dtr)
2139 CREATE_ACCESSORS(dsr, enum sp_dsr)
2140 CREATE_ACCESSORS(xon_xoff, enum sp_xonxoff)
2141
2142 SP_API enum sp_return sp_set_config_flowcontrol(struct sp_port_config *config,
2143 enum sp_flowcontrol flowcontrol)
2144 {
2145 if (!config)
2146 RETURN_ERROR(SP_ERR_ARG, "Null configuration");
2147
2148 if (flowcontrol > SP_FLOWCONTROL_DTRDSR)
2149 RETURN_ERROR(SP_ERR_ARG, "Invalid flow control setting");
2150
2151 if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
2152 config->xon_xoff = SP_XONXOFF_INOUT;
2153 else
2154 config->xon_xoff = SP_XONXOFF_DISABLED;
2155
2156 if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
2157 config->rts = SP_RTS_FLOW_CONTROL;
2158 config->cts = SP_CTS_FLOW_CONTROL;
2159 } else {
2160 if (config->rts == SP_RTS_FLOW_CONTROL)
2161 config->rts = SP_RTS_ON;
2162 config->cts = SP_CTS_IGNORE;
2163 }
2164
2165 if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
2166 config->dtr = SP_DTR_FLOW_CONTROL;
2167 config->dsr = SP_DSR_FLOW_CONTROL;
2168 } else {
2169 if (config->dtr == SP_DTR_FLOW_CONTROL)
2170 config->dtr = SP_DTR_ON;
2171 config->dsr = SP_DSR_IGNORE;
2172 }
2173
2174 RETURN_OK();
2175 }
2176
2177 SP_API enum sp_return sp_set_flowcontrol(struct sp_port *port,
2178 enum sp_flowcontrol flowcontrol)
2179 {
2180 struct port_data data;
2181 struct sp_port_config config;
2182
2183 TRACE("%p, %d", port, flowcontrol);
2184
2185 CHECK_OPEN_PORT();
2186
2187 TRY(get_config(port, &data, &config));
2188
2189 TRY(sp_set_config_flowcontrol(&config, flowcontrol));
2190
2191 TRY(set_config(port, &data, &config));
2192
2193 RETURN_OK();
2194 }
2195
2196 SP_API enum sp_return sp_get_signals(struct sp_port *port,
2197 enum sp_signal *signals)
2198 {
2199 TRACE("%p, %p", port, signals);
2200
2201 CHECK_OPEN_PORT();
2202
2203 if (!signals)
2204 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
2205
2206 DEBUG_FMT("Getting control signals for port %s", port->name);
2207
2208 *signals = 0;
2209 #ifdef _WIN32
2210 DWORD bits;
2211 if (GetCommModemStatus(port->hdl, &bits) == 0)
2212 RETURN_FAIL("GetCommModemStatus() failed");
2213 if (bits & MS_CTS_ON)
2214 *signals |= SP_SIG_CTS;
2215 if (bits & MS_DSR_ON)
2216 *signals |= SP_SIG_DSR;
2217 if (bits & MS_RLSD_ON)
2218 *signals |= SP_SIG_DCD;
2219 if (bits & MS_RING_ON)
2220 *signals |= SP_SIG_RI;
2221 #else
2222 int bits;
2223 if (ioctl(port->fd, TIOCMGET, &bits) < 0)
2224 RETURN_FAIL("TIOCMGET ioctl failed");
2225 if (bits & TIOCM_CTS)
2226 *signals |= SP_SIG_CTS;
2227 if (bits & TIOCM_DSR)
2228 *signals |= SP_SIG_DSR;
2229 if (bits & TIOCM_CAR)
2230 *signals |= SP_SIG_DCD;
2231 if (bits & TIOCM_RNG)
2232 *signals |= SP_SIG_RI;
2233 #endif
2234 RETURN_OK();
2235 }
2236
2237 SP_API enum sp_return sp_start_break(struct sp_port *port)
2238 {
2239 TRACE("%p", port);
2240
2241 CHECK_OPEN_PORT();
2242 #ifdef _WIN32
2243 if (SetCommBreak(port->hdl) == 0)
2244 RETURN_FAIL("SetCommBreak() failed");
2245 #else
2246 if (ioctl(port->fd, TIOCSBRK, 1) < 0)
2247 RETURN_FAIL("TIOCSBRK ioctl failed");
2248 #endif
2249
2250 RETURN_OK();
2251 }
2252
2253 SP_API enum sp_return sp_end_break(struct sp_port *port)
2254 {
2255 TRACE("%p", port);
2256
2257 CHECK_OPEN_PORT();
2258 #ifdef _WIN32
2259 if (ClearCommBreak(port->hdl) == 0)
2260 RETURN_FAIL("ClearCommBreak() failed");
2261 #else
2262 if (ioctl(port->fd, TIOCCBRK, 1) < 0)
2263 RETURN_FAIL("TIOCCBRK ioctl failed");
2264 #endif
2265
2266 RETURN_OK();
2267 }
2268
2269 SP_API int sp_last_error_code(void)
2270 {
2271 TRACE_VOID();
2272 #ifdef _WIN32
2273 RETURN_INT(GetLastError());
2274 #else
2275 RETURN_INT(errno);
2276 #endif
2277 }
2278
2279 SP_API char *sp_last_error_message(void)
2280 {
2281 TRACE_VOID();
2282
2283 #ifdef _WIN32
2284 LPVOID message;
2285 DWORD error = GetLastError();
2286
2287 FormatMessage(
2288 FORMAT_MESSAGE_ALLOCATE_BUFFER |
2289 FORMAT_MESSAGE_FROM_SYSTEM |
2290 FORMAT_MESSAGE_IGNORE_INSERTS,
2291 NULL,
2292 error,
2293 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
2294 (LPTSTR) &message,
2295 0, NULL );
2296
2297 RETURN_STRING(message);
2298 #else
2299 RETURN_STRING(strerror(errno));
2300 #endif
2301 }
2302
2303 SP_API void sp_free_error_message(char *message)
2304 {
2305 TRACE("%s", message);
2306
2307 #ifdef _WIN32
2308 LocalFree(message);
2309 #else
2310 (void)message;
2311 #endif
2312
2313 RETURN();
2314 }
2315
2316 SP_API void sp_set_debug_handler(void (*handler)(const char *format, ...))
2317 {
2318 TRACE("%p", handler);
2319
2320 sp_debug_handler = handler;
2321
2322 RETURN();
2323 }
2324
2325 SP_API void sp_default_debug_handler(const char *format, ...)
2326 {
2327 va_list args;
2328 va_start(args, format);
2329 if (getenv("LIBSERIALPORT_DEBUG")) {
2330 fputs("sp: ", stderr);
2331 vfprintf(stderr, format, args);
2332 }
2333 va_end(args);
2334 }
2335
2336 SP_API int sp_get_major_package_version(void)
2337 {
2338 return SP_PACKAGE_VERSION_MAJOR;
2339 }
2340
2341 SP_API int sp_get_minor_package_version(void)
2342 {
2343 return SP_PACKAGE_VERSION_MINOR;
2344 }
2345
2346 SP_API int sp_get_micro_package_version(void)
2347 {
2348 return SP_PACKAGE_VERSION_MICRO;
2349 }
2350
2351 SP_API const char *sp_get_package_version_string(void)
2352 {
2353 return SP_PACKAGE_VERSION_STRING;
2354 }
2355
2356 SP_API int sp_get_current_lib_version(void)
2357 {
2358 return SP_LIB_VERSION_CURRENT;
2359 }
2360
2361 SP_API int sp_get_revision_lib_version(void)
2362 {
2363 return SP_LIB_VERSION_REVISION;
2364 }
2365
2366 SP_API int sp_get_age_lib_version(void)
2367 {
2368 return SP_LIB_VERSION_AGE;
2369 }
2370
2371 SP_API const char *sp_get_lib_version_string(void)
2372 {
2373 return SP_LIB_VERSION_STRING;
2374 }
2375
2376 /** @} */
gsi's contribution to libserialport