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Support non-standard flow control modes on Linux.
[libserialport.git] / serialport.c
CommitLineData
74510d4b
ML		 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>
31b3a8f5 7 * Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz>
74510d4b
ML		 8 *
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation, either version 3 of the
12 * License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23#include <string.h>
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <fcntl.h>
27#include <unistd.h>
3b63f34d
ML		 28#include <stdlib.h>
29#include <errno.h>
74510d4b
ML		 30#ifdef _WIN32
31#include <windows.h>
3b63f34d 32#include <tchar.h>
767c5ba8 33#include <stdio.h>
74510d4b 34#else
74510d4b
ML		 35#include <termios.h>
36#include <sys/ioctl.h>
37#endif
3b63f34d 38#ifdef __APPLE__
1ebf4347
ML		 39#include <IOKit/IOKitLib.h>
40#include <IOKit/serial/IOSerialKeys.h>
31b3a8f5 41#include <IOKit/serial/ioss.h>
1ebf4347 42#include <sys/syslimits.h>
3b63f34d
ML		 43#endif
44#ifdef __linux__
45#include "libudev.h"
4b97c9fc 46#include "linux/serial.h"
7a6d2196 47#include "linux_termios.h"
40978c2b
ML		 48#if defined(TCGETX) && defined(TCSETX) && defined(HAVE_TERMIOX)
49#define USE_TERMIOX
50#endif
3b63f34d 51#endif
74510d4b 52
f6a1fb65 53#include "libserialport.h"
74510d4b 54
8f189c4c 55struct port_data {
8094e4a0
ML		 56#ifdef _WIN32
57 DCB dcb;
58#else
59 struct termios term;
824dcb45 60 int controlbits;
40978c2b
ML		 61#ifdef USE_TERMIOX
62 int flow;
63#endif
8094e4a0
ML		 64#endif
65};
66
da2748bf
ML		 67/* Standard baud rates. */
68#ifdef _WIN32
69#define BAUD_TYPE DWORD
70#define BAUD(n) {CBR_##n, n}
71#else
72#define BAUD_TYPE speed_t
73#define BAUD(n) {B##n, n}
74#endif
75
76struct std_baudrate {
77 BAUD_TYPE index;
78 int value;
79};
80
81const struct std_baudrate std_baudrates[] = {
82#ifdef _WIN32
83 /*
84 * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
85 * have documented CBR_* macros.
86 */
87 BAUD(110), BAUD(300), BAUD(600), BAUD(1200), BAUD(2400), BAUD(4800),
88 BAUD(9600), BAUD(14400), BAUD(19200), BAUD(38400), BAUD(57600),
eac329d2 89 BAUD(115200), BAUD(128000), BAUD(256000),
da2748bf 90#else
eac329d2
UH		 91 BAUD(50), BAUD(75), BAUD(110), BAUD(134), BAUD(150), BAUD(200),
92 BAUD(300), BAUD(600), BAUD(1200), BAUD(1800), BAUD(2400), BAUD(4800),
93 BAUD(9600), BAUD(19200), BAUD(38400), BAUD(57600), BAUD(115200),
94 BAUD(230400),
da2748bf 95#if !defined(__APPLE__) && !defined(__OpenBSD__)
eac329d2 96 BAUD(460800),
da2748bf
ML		 97#endif
98#endif
99};
100
101#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
102#define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)
103
7a6d2196
ML		 104#define TRY(x) do { int ret = x; if (ret != SP_OK) return ret; } while (0)
105
348e23cc 106/* Helper functions. */
eb6ed20f 107static enum sp_return validate_port(struct sp_port *port);
348e23cc 108static struct sp_port **list_append(struct sp_port **list, const char *portname);
eb6ed20f
ML		 109static enum sp_return get_config(struct sp_port *port, struct port_data *data,
110 struct sp_port_config *config);
111static enum sp_return set_config(struct sp_port *port, struct port_data *data,
112 const struct sp_port_config *config);
80186526 113
eb6ed20f 114enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
d54e9004
ML		 115{
116 struct sp_port *port;
5919c913 117 int len;
d54e9004 118
32b5ac05
ML		 119 if (!port_ptr)
120 return SP_ERR_ARG;
121
77f262c4
ML		 122 *port_ptr = NULL;
123
d4babed2 124 if (!portname)
77f262c4 125 return SP_ERR_ARG;
d4babed2 126
d54e9004 127 if (!(port = malloc(sizeof(struct sp_port))))
77f262c4 128 return SP_ERR_MEM;
d54e9004 129
5919c913
ML		 130 len = strlen(portname) + 1;
131
eac329d2 132 if (!(port->name = malloc(len))) {
d54e9004 133 free(port);
77f262c4 134 return SP_ERR_MEM;
d54e9004
ML		 135 }
136
137 memcpy(port->name, portname, len);
138
8f471c66
ML		 139#ifdef _WIN32
140 port->hdl = INVALID_HANDLE_VALUE;
141#else
142 port->fd = -1;
143#endif
144
77f262c4
ML		 145 *port_ptr = port;
146
147 return SP_OK;
d54e9004
ML		 148}
149
eb6ed20f 150enum sp_return sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr)
32b5ac05
ML		 151{
152 if (!copy_ptr)
153 return SP_ERR_ARG;
154
155 *copy_ptr = NULL;
156
157 if (!port || !port->name)
158 return SP_ERR_ARG;
159
160 return sp_get_port_by_name(port->name, copy_ptr);
161}
162
e3b2f7a4
ML		 163void sp_free_port(struct sp_port *port)
164{
165 if (!port)
166 return;
167
168 if (port->name)
169 free(port->name);
170
171 free(port);
172}
173
348e23cc 174static struct sp_port **list_append(struct sp_port **list, const char *portname)
3b63f34d
ML		 175{
176 void *tmp;
177 unsigned int count;
f92f1f0c 178
3b63f34d 179 for (count = 0; list[count]; count++);
d54e9004 180 if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
3b63f34d
ML		 181 goto fail;
182 list = tmp;
77f262c4 183 if (sp_get_port_by_name(portname, &list[count]) != SP_OK)
3b63f34d 184 goto fail;
db2794ce 185 list[count + 1] = NULL;
3b63f34d 186 return list;
f92f1f0c 187
3b63f34d
ML		 188fail:
189 sp_free_port_list(list);
190 return NULL;
191}
192
eb6ed20f 193enum sp_return sp_list_ports(struct sp_port ***list_ptr)
3b63f34d 194{
d54e9004 195 struct sp_port **list;
77f262c4 196 int ret = SP_OK;
24c1a4bb 197
d54e9004 198 if (!(list = malloc(sizeof(struct sp_port **))))
f92f1f0c 199 return SP_ERR_MEM;
24c1a4bb
ML		 200
201 list[0] = NULL;
3b63f34d
ML		 202
203#ifdef _WIN32
204 HKEY key;
bdfb5b8c
ML		 205 TCHAR *value, *data;
206 DWORD max_value_len, max_data_size, max_data_len;
207 DWORD value_len, data_size, data_len;
3b63f34d 208 DWORD type, index = 0;
8b532d9c
ML		 209 char *name;
210 int name_len;
3b63f34d
ML		 211
212 if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
eac329d2 213 0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS) {
77f262c4
ML		 214 ret = SP_ERR_FAIL;
215 goto out_done;
216 }
3b63f34d 217 if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
eac329d2 218 &max_value_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS) {
77f262c4 219 ret = SP_ERR_FAIL;
3b63f34d 220 goto out_close;
77f262c4 221 }
3b63f34d 222 max_data_len = max_data_size / sizeof(TCHAR);
eac329d2 223 if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) {
77f262c4 224 ret = SP_ERR_MEM;
3b63f34d 225 goto out_close;
77f262c4 226 }
eac329d2 227 if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) {
77f262c4 228 ret = SP_ERR_MEM;
bdfb5b8c 229 goto out_free_value;
77f262c4 230 }
3b63f34d 231 while (
d9573bad 232 value_len = max_value_len + 1,
3b63f34d 233 data_size = max_data_size,
bdfb5b8c 234 RegEnumValue(key, index, value, &value_len,
3b63f34d
ML		 235 NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS)
236 {
237 data_len = data_size / sizeof(TCHAR);
238 data[data_len] = '\0';
8b532d9c
ML		 239#ifdef UNICODE
240 name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL)
241#else
242 name_len = data_len + 1;
243#endif
eac329d2 244 if (!(name = malloc(name_len))) {
77f262c4 245 ret = SP_ERR_MEM;
8b532d9c 246 goto out;
77f262c4 247 }
8b532d9c
ML		 248#ifdef UNICODE
249 WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL);
250#else
251 strcpy(name, data);
252#endif
eac329d2 253 if (type == REG_SZ && !(list = list_append(list, name))) {
77f262c4
ML		 254 ret = SP_ERR_MEM;
255 goto out;
256 }
3b63f34d
ML		 257 index++;
258 }
259out:
260 free(data);
bdfb5b8c
ML		 261out_free_value:
262 free(value);
3b63f34d
ML		 263out_close:
264 RegCloseKey(key);
77f262c4 265out_done:
3b63f34d
ML		 266#endif
267#ifdef __APPLE__
268 mach_port_t master;
269 CFMutableDictionaryRef classes;
270 io_iterator_t iter;
271 char *path;
272 io_object_t port;
273 CFTypeRef cf_path;
274 Boolean result;
275
eac329d2 276 if (IOMasterPort(MACH_PORT_NULL, &master) != KERN_SUCCESS) {
77f262c4
ML		 277 ret = SP_ERR_FAIL;
278 goto out_done;
279 }
3b63f34d 280
eac329d2 281 if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue))) {
77f262c4
ML		 282 ret = SP_ERR_FAIL;
283 goto out_done;
284 }
3b63f34d
ML		 285
286 CFDictionarySetValue(classes,
287 CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDAllTypes));
288
eac329d2 289 if (IOServiceGetMatchingServices(master, classes, &iter) != KERN_SUCCESS) {
77f262c4
ML		 290 ret = SP_ERR_FAIL;
291 goto out_done;
292 }
3b63f34d 293
eac329d2 294 if (!(path = malloc(PATH_MAX))) {
77f262c4 295 ret = SP_ERR_MEM;
3b63f34d 296 goto out_release;
77f262c4 297 }
3b63f34d 298
1ebf4347 299 while ((port = IOIteratorNext(iter))) {
3b63f34d
ML		 300 cf_path = IORegistryEntryCreateCFProperty(port,
301 CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0);
302 if (cf_path) {
303 result = CFStringGetCString(cf_path,
304 path, PATH_MAX, kCFStringEncodingASCII);
305 CFRelease(cf_path);
eac329d2 306 if (result && !(list = list_append(list, path))) {
77f262c4
ML		 307 ret = SP_ERR_MEM;
308 IOObjectRelease(port);
309 goto out;
310 }
3b63f34d
ML		 311 }
312 IOObjectRelease(port);
313 }
3b63f34d
ML		 314out:
315 free(path);
316out_release:
317 IOObjectRelease(iter);
77f262c4 318out_done:
3b63f34d
ML		 319#endif
320#ifdef __linux__
321 struct udev *ud;
322 struct udev_enumerate *ud_enumerate;
323 struct udev_list_entry *ud_list;
324 struct udev_list_entry *ud_entry;
325 const char *path;
08fe0bdb 326 struct udev_device *ud_dev, *ud_parent;
3b63f34d 327 const char *name;
4b97c9fc
ML		 328 const char *driver;
329 int fd, ioctl_result;
330 struct serial_struct serial_info;
3b63f34d
ML		 331
332 ud = udev_new();
333 ud_enumerate = udev_enumerate_new(ud);
334 udev_enumerate_add_match_subsystem(ud_enumerate, "tty");
335 udev_enumerate_scan_devices(ud_enumerate);
336 ud_list = udev_enumerate_get_list_entry(ud_enumerate);
eac329d2 337 udev_list_entry_foreach(ud_entry, ud_list) {
3b63f34d
ML		 338 path = udev_list_entry_get_name(ud_entry);
339 ud_dev = udev_device_new_from_syspath(ud, path);
08fe0bdb
ML		 340 /* If there is no parent device, this is a virtual tty. */
341 ud_parent = udev_device_get_parent(ud_dev);
eac329d2 342 if (ud_parent == NULL) {
08fe0bdb
ML		 343 udev_device_unref(ud_dev);
344 continue;
345 }
3b63f34d 346 name = udev_device_get_devnode(ud_dev);
4b97c9fc
ML		 347 /* The serial8250 driver has a hardcoded number of ports.
348 * The only way to tell which actually exist on a given system
349 * is to try to open them and make an ioctl call. */
350 driver = udev_device_get_driver(ud_parent);
eac329d2 351 if (driver && !strcmp(driver, "serial8250")) {
4b97c9fc
ML		 352 if ((fd = open(name, O_RDWR | O_NONBLOCK | O_NOCTTY)) < 0)
353 goto skip;
354 ioctl_result = ioctl(fd, TIOCGSERIAL, &serial_info);
355 close(fd);
356 if (ioctl_result != 0)
357 goto skip;
358 if (serial_info.type == PORT_UNKNOWN)
359 goto skip;
360 }
348e23cc 361 list = list_append(list, name);
4b97c9fc 362skip:
3b63f34d 363 udev_device_unref(ud_dev);
eac329d2 364 if (!list) {
77f262c4 365 ret = SP_ERR_MEM;
3b63f34d 366 goto out;
77f262c4 367 }
3b63f34d
ML		 368 }
369out:
370 udev_enumerate_unref(ud_enumerate);
371 udev_unref(ud);
3b63f34d 372#endif
77f262c4 373
eac329d2 374 if (ret == SP_OK) {
77f262c4 375 *list_ptr = list;
eac329d2 376 } else {
77f262c4
ML		 377 if (list)
378 sp_free_port_list(list);
77f262c4
ML		 379 *list_ptr = NULL;
380 }
381
382 return ret;
3b63f34d
ML		 383}
384
d54e9004 385void sp_free_port_list(struct sp_port **list)
3b63f34d
ML		 386{
387 unsigned int i;
f92f1f0c 388
3b63f34d 389 for (i = 0; list[i]; i++)
e3b2f7a4 390 sp_free_port(list[i]);
3b63f34d
ML		 391 free(list);
392}
393
eb6ed20f 394static enum sp_return validate_port(struct sp_port *port)
74510d4b
ML		 395{
396 if (port == NULL)
397 return 0;
398#ifdef _WIN32
399 if (port->hdl == INVALID_HANDLE_VALUE)
400 return 0;
401#else
402 if (port->fd < 0)
403 return 0;
404#endif
405 return 1;
406}
407
348e23cc 408#define CHECK_PORT() do { if (!validate_port(port)) return SP_ERR_ARG; } while (0)
74510d4b 409
eb6ed20f 410enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
74510d4b
ML		 411{
412 if (!port)
413 return SP_ERR_ARG;
414
74510d4b
ML		 415#ifdef _WIN32
416 DWORD desired_access = 0, flags_and_attributes = 0;
99945a1f
ML		 417 char *escaped_port_name;
418
419 /* Prefix port name with '\\.\' to work with ports above COM9. */
420 if (!(escaped_port_name = malloc(strlen(port->name + 5))))
421 return SP_ERR_MEM;
422 sprintf(escaped_port_name, "\\\\.\\%s", port->name);
423
74510d4b
ML		 424 /* Map 'flags' to the OS-specific settings. */
425 desired_access |= GENERIC_READ;
426 flags_and_attributes = FILE_ATTRIBUTE_NORMAL;
427 if (flags & SP_MODE_RDWR)
428 desired_access |= GENERIC_WRITE;
429 if (flags & SP_MODE_NONBLOCK)
430 flags_and_attributes |= FILE_FLAG_OVERLAPPED;
431
99945a1f 432 port->hdl = CreateFile(escaped_port_name, desired_access, 0, 0,
74510d4b 433 OPEN_EXISTING, flags_and_attributes, 0);
99945a1f
ML		 434
435 free(escaped_port_name);
436
74510d4b
ML		 437 if (port->hdl == INVALID_HANDLE_VALUE)
438 return SP_ERR_FAIL;
439#else
440 int flags_local = 0;
8f189c4c 441 struct port_data data;
e33ab9aa
ML		 442 struct sp_port_config config;
443 int ret;
f92f1f0c 444
74510d4b
ML		 445 /* Map 'flags' to the OS-specific settings. */
446 if (flags & SP_MODE_RDWR)
447 flags_local |= O_RDWR;
448 if (flags & SP_MODE_RDONLY)
449 flags_local |= O_RDONLY;
450 if (flags & SP_MODE_NONBLOCK)
451 flags_local |= O_NONBLOCK;
452
453 if ((port->fd = open(port->name, flags_local)) < 0)
454 return SP_ERR_FAIL;
9cb98459 455
e33ab9aa
ML		 456 ret = get_config(port, &data, &config);
457
eac329d2 458 if (ret < 0) {
e33ab9aa
ML		 459 sp_close(port);
460 return ret;
461 }
9cb98459
ML		 462
463 /* Turn off all serial port cooking. */
464 data.term.c_iflag &= ~(ISTRIP | INLCR | ICRNL);
465 data.term.c_oflag &= ~(ONLCR | OCRNL | ONOCR);
466#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__)
467 data.term.c_oflag &= ~OFILL;
468#endif
469 /* Disable canonical mode, and don't echo input characters. */
470 data.term.c_lflag &= ~(ICANON | ECHO);
471
472 /* Ignore modem status lines; enable receiver */
473 data.term.c_cflag |= (CLOCAL | CREAD);
474
e33ab9aa
ML		 475 ret = set_config(port, &data, &config);
476
eac329d2 477 if (ret < 0) {
e33ab9aa
ML		 478 sp_close(port);
479 return ret;
480 }
74510d4b
ML		 481#endif
482
483 return SP_OK;
484}
485
eb6ed20f 486enum sp_return sp_close(struct sp_port *port)
74510d4b
ML		 487{
488 CHECK_PORT();
489
490#ifdef _WIN32
491 /* Returns non-zero upon success, 0 upon failure. */
492 if (CloseHandle(port->hdl) == 0)
493 return SP_ERR_FAIL;
8f471c66 494 port->hdl = INVALID_HANDLE_VALUE;
74510d4b
ML		 495#else
496 /* Returns 0 upon success, -1 upon failure. */
497 if (close(port->fd) == -1)
498 return SP_ERR_FAIL;
8f471c66 499 port->fd = -1;
74510d4b
ML		 500#endif
501
502 return SP_OK;
503}
504
eb6ed20f 505enum sp_return sp_flush(struct sp_port *port)
74510d4b
ML		 506{
507 CHECK_PORT();
508
509#ifdef _WIN32
510 /* Returns non-zero upon success, 0 upon failure. */
511 if (PurgeComm(port->hdl, PURGE_RXCLEAR | PURGE_TXCLEAR) == 0)
512 return SP_ERR_FAIL;
513#else
514 /* Returns 0 upon success, -1 upon failure. */
515 if (tcflush(port->fd, TCIOFLUSH) < 0)
516 return SP_ERR_FAIL;
517#endif
518 return SP_OK;
519}
520
eb6ed20f 521enum sp_return sp_write(struct sp_port *port, const void *buf, size_t count)
74510d4b
ML		 522{
523 CHECK_PORT();
524
525 if (!buf)
526 return SP_ERR_ARG;
527
528#ifdef _WIN32
529 DWORD written = 0;
f92f1f0c 530
74510d4b
ML		 531 /* Returns non-zero upon success, 0 upon failure. */
532 if (WriteFile(port->hdl, buf, count, &written, NULL) == 0)
533 return SP_ERR_FAIL;
534 return written;
535#else
536 /* Returns the number of bytes written, or -1 upon failure. */
537 ssize_t written = write(port->fd, buf, count);
f92f1f0c 538
74510d4b
ML		 539 if (written < 0)
540 return SP_ERR_FAIL;
541 else
f92f1f0c 542 return written;
74510d4b
ML		 543#endif
544}
545
eb6ed20f 546enum sp_return sp_read(struct sp_port *port, void *buf, size_t count)
74510d4b
ML		 547{
548 CHECK_PORT();
549
550 if (!buf)
551 return SP_ERR_ARG;
552
553#ifdef _WIN32
554 DWORD bytes_read = 0;
f92f1f0c 555
74510d4b
ML		 556 /* Returns non-zero upon success, 0 upon failure. */
557 if (ReadFile(port->hdl, buf, count, &bytes_read, NULL) == 0)
558 return SP_ERR_FAIL;
559 return bytes_read;
560#else
561 ssize_t bytes_read;
f92f1f0c 562
74510d4b
ML		 563 /* Returns the number of bytes read, or -1 upon failure. */
564 if ((bytes_read = read(port->fd, buf, count)) < 0)
565 return SP_ERR_FAIL;
566 return bytes_read;
567#endif
568}
569
7a6d2196
ML		 570#ifdef __linux__
571static enum sp_return get_baudrate(int fd, int *baudrate)
572{
573 void *data;
574
575 if (!(data = malloc(get_termios_size())))
576 return SP_ERR_MEM;
577
578 if (ioctl(fd, get_termios_get_ioctl(), data) < 0)
579 return SP_ERR_FAIL;
580
581 *baudrate = get_termios_speed(data);
582
583 return SP_OK;
584}
585
586static enum sp_return set_baudrate(int fd, int baudrate)
587{
588 void *data;
589
590 if (!(data = malloc(get_termios_size())))
591 return SP_ERR_MEM;
592
593 if (ioctl(fd, get_termios_get_ioctl(), data) < 0)
594 return SP_ERR_FAIL;
595
596 set_termios_speed(data, baudrate);
597
598 if (ioctl(fd, get_termios_set_ioctl(), data) < 0)
599 return SP_ERR_FAIL;
600
601 return SP_OK;
602}
40978c2b
ML		 603
604#ifdef USE_TERMIOX
605static enum sp_return get_flow(int fd, int *flow)
606{
607 void *data;
608
609 if (!(data = malloc(get_termiox_size())))
610 return SP_ERR_MEM;
611
612 if (ioctl(fd, TCGETX, data) < 0)
613 return SP_ERR_FAIL;
614
615 *flow = get_termiox_flow(data);
616
617 return SP_OK;
618}
619
620static enum sp_return set_flow(int fd, int flow)
621{
622 void *data;
623
624 if (!(data = malloc(get_termiox_size())))
625 return SP_ERR_MEM;
626
627 if (ioctl(fd, TCGETX, data) < 0)
628 return SP_ERR_FAIL;
629
630 set_termiox_flow(data, flow);
631
632 if (ioctl(fd, TCSETX, data) < 0)
633 return SP_ERR_FAIL;
634
635 return SP_OK;
636}
637#endif /* USE_TERMIOX */
638#endif /* __linux__ */
7a6d2196 639
eb6ed20f
ML		 640static enum sp_return get_config(struct sp_port *port, struct port_data *data,
641 struct sp_port_config *config)
8094e4a0 642{
da2748bf 643 unsigned int i;
cbf628c7 644
8094e4a0 645#ifdef _WIN32
e33ab9aa 646 if (!GetCommState(port->hdl, &data->dcb))
d514a26f 647 return SP_ERR_FAIL;
8094e4a0 648
067417af 649 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
e33ab9aa 650 if (data->dcb.BaudRate == std_baudrates[i].index) {
067417af
ML		 651 config->baudrate = std_baudrates[i].value;
652 break;
653 }
654 }
655
656 if (i == NUM_STD_BAUDRATES)
657 /* BaudRate field can be either an index or a custom baud rate. */
e33ab9aa 658 config->baudrate = data->dcb.BaudRate;
067417af 659
e33ab9aa 660 config->bits = data->dcb.ByteSize;
067417af 661
e33ab9aa
ML		 662 if (data->dcb.fParity)
663 switch (data->dcb.Parity) {
067417af
ML		 664 case NOPARITY:
665 config->parity = SP_PARITY_NONE;
666 break;
667 case EVENPARITY:
668 config->parity = SP_PARITY_EVEN;
669 break;
670 case ODDPARITY:
671 config->parity = SP_PARITY_ODD;
672 break;
673 default:
674 config->parity = -1;
675 }
676 else
677 config->parity = SP_PARITY_NONE;
678
e33ab9aa 679 switch (data->dcb.StopBits) {
067417af
ML		 680 case ONESTOPBIT:
681 config->stopbits = 1;
682 break;
683 case TWOSTOPBITS:
684 config->stopbits = 2;
685 break;
686 default:
687 config->stopbits = -1;
688 }
689
e33ab9aa 690 switch (data->dcb.fRtsControl) {
eac329d2
UH		 691 case RTS_CONTROL_DISABLE:
692 config->rts = SP_RTS_OFF;
693 break;
694 case RTS_CONTROL_ENABLE:
695 config->rts = SP_RTS_ON;
696 break;
697 case RTS_CONTROL_HANDSHAKE:
698 config->rts = SP_RTS_FLOW_CONTROL;
699 break;
700 default:
701 config->rts = -1;
067417af
ML		 702 }
703
e33ab9aa 704 config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
067417af 705
e33ab9aa 706 switch (data->dcb.fDtrControl) {
eac329d2
UH		 707 case DTR_CONTROL_DISABLE:
708 config->dtr = SP_DTR_OFF;
709 break;
710 case DTR_CONTROL_ENABLE:
711 config->dtr = SP_DTR_ON;
712 break;
713 case DTR_CONTROL_HANDSHAKE:
714 config->dtr = SP_DTR_FLOW_CONTROL;
715 break;
716 default:
717 config->dtr = -1;
067417af
ML		 718 }
719
e33ab9aa
ML		 720 config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
721
c6754b45
ML		 722 if (data->dcb.fInX) {
723 if (data->dcb.fOutX)
724 config->xon_xoff = SP_XONXOFF_INOUT;
725 else
726 config->xon_xoff = SP_XONXOFF_IN;
727 } else {
728 if (data->dcb.fOutX)
729 config->xon_xoff = SP_XONXOFF_OUT;
730 else
731 config->xon_xoff = SP_XONXOFF_DISABLED;
732 }
733
e33ab9aa
ML		 734#else // !_WIN32
735
736 if (tcgetattr(port->fd, &data->term) < 0)
737 return SP_ERR_FAIL;
738
739 if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
740 return SP_ERR_FAIL;
40978c2b
ML		 741
742#ifdef USE_TERMIOX
743 TRY(get_flow(port->fd, &data->flow));
744#endif
745
067417af 746 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
e33ab9aa 747 if (cfgetispeed(&data->term) == std_baudrates[i].index) {
067417af
ML		 748 config->baudrate = std_baudrates[i].value;
749 break;
750 }
751 }
752
31b3a8f5
MH		 753 if (i == NUM_STD_BAUDRATES) {
754#ifdef __APPLE__
755 config->baudrate = (int)data->term.c_ispeed;
7a6d2196
ML		 756#elif defined(__linux__)
757 TRY(get_baudrate(port->fd, &config->baudrate));
31b3a8f5 758#else
067417af 759 config->baudrate = -1;
31b3a8f5
MH		 760#endif
761 }
067417af 762
e33ab9aa 763 switch (data->term.c_cflag & CSIZE) {
067417af
ML		 764 case CS8:
765 config->bits = 8;
766 break;
767 case CS7:
768 config->bits = 7;
769 break;
770 case CS6:
771 config->bits = 6;
772 break;
773 case CS5:
774 config->bits = 5;
775 break;
776 default:
777 config->bits = -1;
778 }
779
e33ab9aa 780 if (!(data->term.c_cflag & PARENB) && (data->term.c_iflag & IGNPAR))
067417af 781 config->parity = SP_PARITY_NONE;
e33ab9aa 782 else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR))
067417af
ML		 783 config->parity = -1;
784 else
e33ab9aa 785 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
067417af 786
e33ab9aa 787 config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1;
067417af 788
e33ab9aa 789 if (data->term.c_cflag & CRTSCTS) {
067417af
ML		 790 config->rts = SP_RTS_FLOW_CONTROL;
791 config->cts = SP_CTS_FLOW_CONTROL;
792 } else {
40978c2b
ML		 793#ifdef USE_TERMIOX
794 if (data->flow & RTS_FLOW)
795 config->rts = SP_RTS_FLOW_CONTROL;
796 else
797 config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
798
799 config->cts = (data->flow & CTS_FLOW) ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
800#else
e33ab9aa 801 config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
067417af 802 config->cts = SP_CTS_IGNORE;
40978c2b 803#endif
067417af
ML		 804 }
805
40978c2b
ML		 806#ifdef USE_TERMIOX
807 if (data->flow & DTR_FLOW)
808 config->dtr = SP_DTR_FLOW_CONTROL;
809 else
810 config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
811
812 config->dsr = (data->flow & DSR_FLOW) ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
813#else
e33ab9aa 814 config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
067417af 815 config->dsr = SP_DSR_IGNORE;
40978c2b 816#endif
705bdc69 817
e29b93a5
ML		 818 if (data->term.c_iflag & IXOFF) {
819 if (data->term.c_iflag & IXON)
820 config->xon_xoff = SP_XONXOFF_INOUT;
821 else
822 config->xon_xoff = SP_XONXOFF_IN;
823 } else {
824 if (data->term.c_iflag & IXON)
825 config->xon_xoff = SP_XONXOFF_OUT;
826 else
827 config->xon_xoff = SP_XONXOFF_DISABLED;
828 }
067417af
ML		 829#endif
830
831 return SP_OK;
832}
833
7a6d2196 834static enum sp_return set_config(struct sp_port *port, struct port_data *data,
eb6ed20f 835 const struct sp_port_config *config)
18fc2dd1 836{
e33ab9aa 837 unsigned int i;
31b3a8f5
MH		 838#ifdef __APPLE__
839 BAUD_TYPE baud_nonstd;
840
841 baud_nonstd = B0;
842#endif
7a6d2196
ML		 843#ifdef __linux__
844 int baud_nonstd = 0;
845#endif
18fc2dd1 846
e33ab9aa 847#ifdef _WIN32
eac329d2 848 if (config->baudrate >= 0) {
e33ab9aa
ML		 849 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
850 if (config->baudrate == std_baudrates[i].value) {
851 data->dcb.BaudRate = std_baudrates[i].index;
852 break;
853 }
854 }
18fc2dd1 855
e33ab9aa
ML		 856 if (i == NUM_STD_BAUDRATES)
857 data->dcb.BaudRate = config->baudrate;
858 }
18fc2dd1 859
e33ab9aa
ML		 860 if (config->bits >= 0)
861 data->dcb.ByteSize = config->bits;
862
863 if (config->parity >= 0) {
864 switch (config->parity) {
865 /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */
866 case SP_PARITY_NONE:
867 data->dcb.Parity = NOPARITY;
868 break;
869 case SP_PARITY_EVEN:
870 data->dcb.Parity = EVENPARITY;
871 break;
872 case SP_PARITY_ODD:
873 data->dcb.Parity = ODDPARITY;
874 break;
875 default:
876 return SP_ERR_ARG;
877 }
18fc2dd1
ML		 878 }
879
e33ab9aa
ML		 880 if (config->stopbits >= 0) {
881 switch (config->stopbits) {
882 /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
883 case 1:
884 data->dcb.StopBits = ONESTOPBIT;
885 break;
886 case 2:
887 data->dcb.StopBits = TWOSTOPBITS;
888 break;
889 default:
890 return SP_ERR_ARG;
891 }
892 }
893
894 if (config->rts >= 0) {
895 switch (config->rts) {
896 case SP_RTS_OFF:
897 data->dcb.fRtsControl = RTS_CONTROL_DISABLE;
898 break;
899 case SP_RTS_ON:
900 data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
901 break;
902 case SP_RTS_FLOW_CONTROL:
903 data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
904 break;
905 default:
906 return SP_ERR_ARG;
907 }
908 }
909
910 if (config->cts >= 0) {
911 switch (config->cts) {
912 case SP_CTS_IGNORE:
913 data->dcb.fOutxCtsFlow = FALSE;
914 break;
915 case SP_CTS_FLOW_CONTROL:
916 data->dcb.fOutxCtsFlow = TRUE;
917 break;
918 default:
919 return SP_ERR_ARG;
920 }
921 }
922
923 if (config->dtr >= 0) {
924 switch (config->dtr) {
925 case SP_DTR_OFF:
926 data->dcb.fDtrControl = DTR_CONTROL_DISABLE;
927 break;
928 case SP_DTR_ON:
929 data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
930 break;
931 case SP_DTR_FLOW_CONTROL:
932 data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
933 break;
934 default:
935 return SP_ERR_ARG;
936 }
937 }
938
939 if (config->dsr >= 0) {
940 switch (config->dsr) {
941 case SP_DSR_IGNORE:
942 data->dcb.fOutxDsrFlow = FALSE;
943 break;
944 case SP_DSR_FLOW_CONTROL:
945 data->dcb.fOutxDsrFlow = TRUE;
946 break;
947 default:
948 return SP_ERR_ARG;
949 }
18fc2dd1
ML		 950 }
951
e33ab9aa
ML		 952 if (config->xon_xoff >= 0) {
953 switch (config->xon_xoff) {
954 case SP_XONXOFF_DISABLED:
955 data->dcb.fInX = FALSE;
956 data->dcb.fOutX = FALSE;
957 break;
958 case SP_XONXOFF_IN:
959 data->dcb.fInX = TRUE;
960 data->dcb.fOutX = FALSE;
961 break;
962 case SP_XONXOFF_OUT:
963 data->dcb.fInX = FALSE;
964 data->dcb.fOutX = TRUE;
965 break;
966 case SP_XONXOFF_INOUT:
967 data->dcb.fInX = TRUE;
968 data->dcb.fOutX = TRUE;
969 break;
970 default:
971 return SP_ERR_ARG;
972 }
973 }
974
975 if (!SetCommState(port->hdl, &data->dcb))
976 return SP_ERR_FAIL;
977
31b3a8f5 978#else /* !_WIN32 */
e33ab9aa 979
7a6d2196
ML		 980 int controlbits;
981
eac329d2 982 if (config->baudrate >= 0) {
e33ab9aa
ML		 983 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
984 if (config->baudrate == std_baudrates[i].value) {
985 if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
986 return SP_ERR_FAIL;
987
988 if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
989 return SP_ERR_FAIL;
990 break;
991 }
992 }
993
31b3a8f5
MH		 994 /* Non-standard baud rate */
995 if (i == NUM_STD_BAUDRATES) {
996#ifdef __APPLE__
997 /* Set "dummy" baud rate */
998 if (cfsetspeed(&data->term, B9600) < 0)
999 return SP_ERR_FAIL;
1000 baud_nonstd = config->baudrate;
7a6d2196
ML		 1001#elif defined(__linux__)
1002 baud_nonstd = 1;
31b3a8f5 1003#else
e33ab9aa 1004 return SP_ERR_ARG;
31b3a8f5
MH		 1005#endif
1006 }
e33ab9aa
ML		 1007 }
1008
1009 if (config->bits >= 0) {
1010 data->term.c_cflag &= ~CSIZE;
1011 switch (config->bits) {
1012 case 8:
1013 data->term.c_cflag |= CS8;
1014 break;
1015 case 7:
1016 data->term.c_cflag |= CS7;
1017 break;
1018 case 6:
1019 data->term.c_cflag |= CS6;
1020 break;
23922313
UH		 1021 case 5:
1022 data->term.c_cflag |= CS5;
1023 break;
e33ab9aa
ML		 1024 default:
1025 return SP_ERR_ARG;
1026 }
1027 }
1028
1029 if (config->parity >= 0) {
1030 data->term.c_iflag &= ~IGNPAR;
1031 data->term.c_cflag &= ~(PARENB | PARODD);
1032 switch (config->parity) {
1033 case SP_PARITY_NONE:
1034 data->term.c_iflag |= IGNPAR;
1035 break;
1036 case SP_PARITY_EVEN:
1037 data->term.c_cflag |= PARENB;
1038 break;
1039 case SP_PARITY_ODD:
1040 data->term.c_cflag |= PARENB | PARODD;
1041 break;
1042 default:
1043 return SP_ERR_ARG;
1044 }
1045 }
1046
1047 if (config->stopbits >= 0) {
1048 data->term.c_cflag &= ~CSTOPB;
1049 switch (config->stopbits) {
1050 case 1:
1051 data->term.c_cflag &= ~CSTOPB;
1052 break;
1053 case 2:
1054 data->term.c_cflag |= CSTOPB;
1055 break;
1056 default:
1057 return SP_ERR_ARG;
1058 }
1059 }
1060
eac329d2 1061 if (config->rts >= 0 || config->cts >= 0) {
40978c2b
ML		 1062#ifdef USE_TERMIOX
1063 data->flow &= ~(RTS_FLOW | CTS_FLOW);
1064 switch (config->rts) {
1065 case SP_RTS_OFF:
1066 case SP_RTS_ON:
1067 controlbits = TIOCM_RTS;
1068 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
1069 &controlbits) < 0)
1070 return SP_ERR_FAIL;
1071 break;
1072 case SP_RTS_FLOW_CONTROL:
1073 data->flow |= RTS_FLOW;
1074 break;
1075 default:
1076 break;
1077 }
1078 if (config->cts == SP_CTS_FLOW_CONTROL)
1079 data->flow |= CTS_FLOW;
e33ab9aa 1080
40978c2b
ML		 1081 if (data->flow & (RTS_FLOW | CTS_FLOW))
1082 data->term.c_iflag |= CRTSCTS;
1083 else
1084 data->term.c_iflag &= ~CRTSCTS;
1085#else
1086 /* Asymmetric use of RTS/CTS not supported. */
e33ab9aa
ML		 1087 if (data->term.c_iflag & CRTSCTS) {
1088 /* Flow control can only be disabled for both RTS & CTS together. */
1089 if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
1090 if (config->cts != SP_CTS_IGNORE)
1091 return SP_ERR_ARG;
1092 }
1093 if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
1094 if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
1095 return SP_ERR_ARG;
1096 }
1097 } else {
1098 /* Flow control can only be enabled for both RTS & CTS together. */
1099 if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
1100 ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
1101 return SP_ERR_ARG;
1102 }
1103
1104 if (config->rts >= 0) {
1105 if (config->rts == SP_RTS_FLOW_CONTROL) {
1106 data->term.c_iflag |= CRTSCTS;
1107 } else {
7a6d2196 1108 controlbits = TIOCM_RTS;
e33ab9aa
ML		 1109 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
1110 &controlbits) < 0)
1111 return SP_ERR_FAIL;
1112 }
1113 }
40978c2b 1114#endif
e33ab9aa
ML		 1115 }
1116
eac329d2 1117 if (config->dtr >= 0 || config->dsr >= 0) {
40978c2b
ML		 1118#ifdef USE_TERMIOX
1119 data->flow &= ~(DTR_FLOW | DSR_FLOW);
1120 switch (config->dtr) {
1121 case SP_DTR_OFF:
1122 case SP_DTR_ON:
1123 controlbits = TIOCM_DTR;
1124 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
1125 &controlbits) < 0)
1126 return SP_ERR_FAIL;
1127 break;
1128 case SP_DTR_FLOW_CONTROL:
1129 data->flow |= DTR_FLOW;
1130 break;
1131 default:
1132 break;
1133 }
1134 if (config->dsr == SP_DSR_FLOW_CONTROL)
1135 data->flow |= DSR_FLOW;
1136#else
1137 /* DTR/DSR flow control not supported. */
e33ab9aa
ML		 1138 if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
1139 return SP_ERR_ARG;
1140
1141 if (config->dtr >= 0) {
7a6d2196 1142 controlbits = TIOCM_DTR;
e33ab9aa
ML		 1143 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
1144 &controlbits) < 0)
1145 return SP_ERR_FAIL;
1146 }
40978c2b 1147#endif
e33ab9aa
ML		 1148 }
1149
1150 if (config->xon_xoff >= 0) {
1151 data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
1152 switch (config->xon_xoff) {
1153 case SP_XONXOFF_DISABLED:
1154 break;
1155 case SP_XONXOFF_IN:
1156 data->term.c_iflag |= IXOFF;
1157 break;
1158 case SP_XONXOFF_OUT:
1159 data->term.c_iflag |= IXON | IXANY;
1160 break;
1161 case SP_XONXOFF_INOUT:
1162 data->term.c_iflag |= IXON | IXOFF | IXANY;
1163 break;
1164 default:
1165 return SP_ERR_ARG;
1166 }
1167 }
1168
1169 if (tcsetattr(port->fd, TCSADRAIN, &data->term) < 0)
1170 return SP_ERR_FAIL;
31b3a8f5
MH		 1171
1172#ifdef __APPLE__
1173 if (baud_nonstd != B0) {
1174 if (ioctl(port->fd, IOSSIOSPEED, &baud_nonstd) == -1)
1175 return SP_ERR_FAIL;
1176 /* Set baud rates in data->term to correct, but incompatible
1177 * with tcsetattr() value, same as delivered by tcgetattr(). */
1178 if (cfsetspeed(&data->term, baud_nonstd) < 0)
1179 return SP_ERR_FAIL;
1180 }
7a6d2196
ML		 1181#elif defined(__linux__)
1182 if (baud_nonstd)
1183 TRY(set_baudrate(port->fd, config->baudrate));
40978c2b
ML		 1184#ifdef USE_TERMIOX
1185 TRY(set_flow(port->fd, data->flow));
1186#endif
7a6d2196 1187#endif
31b3a8f5
MH		 1188
1189#endif /* !_WIN32 */
e33ab9aa
ML		 1190
1191 return SP_OK;
1192}
1193
eb6ed20f 1194enum sp_return sp_set_config(struct sp_port *port, const struct sp_port_config *config)
e33ab9aa 1195{
8f189c4c 1196 struct port_data data;
e33ab9aa
ML		 1197 struct sp_port_config prev_config;
1198
823690ae
ML		 1199 CHECK_PORT();
1200
1201 if (!config)
1202 return SP_ERR_ARG;
1203
e33ab9aa
ML		 1204 TRY(get_config(port, &data, &prev_config));
1205 TRY(set_config(port, &data, config));
74510d4b
ML		 1206
1207 return SP_OK;
1208}
1209
eb6ed20f 1210#define CREATE_SETTER(x, type) int sp_set_##x(struct sp_port *port, type x) { \
8f189c4c 1211 struct port_data data; \
e33ab9aa 1212 struct sp_port_config config; \
823690ae 1213 CHECK_PORT(); \
e33ab9aa
ML		 1214 TRY(get_config(port, &data, &config)); \
1215 config.x = x; \
1216 TRY(set_config(port, &data, &config)); \
9069c2fb
ML		 1217 return SP_OK; \
1218}
1219
eb6ed20f
ML		 1220CREATE_SETTER(baudrate, int)
1221CREATE_SETTER(bits, int)
1222CREATE_SETTER(parity, enum sp_parity)
1223CREATE_SETTER(stopbits, int)
1224CREATE_SETTER(rts, enum sp_rts)
1225CREATE_SETTER(cts, enum sp_cts)
1226CREATE_SETTER(dtr, enum sp_dtr)
1227CREATE_SETTER(dsr, enum sp_dsr)
1228CREATE_SETTER(xon_xoff, enum sp_xonxoff)
1229
1230enum sp_return sp_set_flowcontrol(struct sp_port *port, enum sp_flowcontrol flowcontrol)
e33ab9aa 1231{
8f189c4c 1232 struct port_data data;
e33ab9aa
ML		 1233 struct sp_port_config config;
1234
823690ae
ML		 1235 CHECK_PORT();
1236
e33ab9aa
ML		 1237 TRY(get_config(port, &data, &config));
1238
1239 if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
1240 config.xon_xoff = SP_XONXOFF_INOUT;
1241 else
1242 config.xon_xoff = SP_XONXOFF_DISABLED;
1243
1244 if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
1245 config.rts = SP_RTS_FLOW_CONTROL;
1246 config.cts = SP_CTS_FLOW_CONTROL;
1247 } else {
1248 if (config.rts == SP_RTS_FLOW_CONTROL)
1249 config.rts = SP_RTS_ON;
1250 config.cts = SP_CTS_IGNORE;
1251 }
1252
1253 if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
1254 config.dtr = SP_DTR_FLOW_CONTROL;
1255 config.dsr = SP_DSR_FLOW_CONTROL;
1256 } else {
1257 if (config.dtr == SP_DTR_FLOW_CONTROL)
1258 config.dtr = SP_DTR_ON;
1259 config.dsr = SP_DSR_IGNORE;
1260 }
1261
1262 TRY(set_config(port, &data, &config));
1263
1264 return SP_OK;
1265}
1266
74510d4b
ML		 1267int sp_last_error_code(void)
1268{
1269#ifdef _WIN32
1270 return GetLastError();
1271#else
1272 return errno;
1273#endif
1274}
1275
74510d4b
ML		 1276char *sp_last_error_message(void)
1277{
1278#ifdef _WIN32
1279 LPVOID message;
1280 DWORD error = GetLastError();
1281
1282 FormatMessage(
1283 FORMAT_MESSAGE_ALLOCATE_BUFFER |
1284 FORMAT_MESSAGE_FROM_SYSTEM |
1285 FORMAT_MESSAGE_IGNORE_INSERTS,
1286 NULL,
1287 error,
1288 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
1289 (LPTSTR) &message,
1290 0, NULL );
1291
1292 return message;
1293#else
1294 return strerror(errno);
1295#endif
1296}
1297
74510d4b
ML		 1298void sp_free_error_message(char *message)
1299{
1300#ifdef _WIN32
1301 LocalFree(message);
64eec30d
ML		 1302#else
1303 (void)message;
74510d4b
ML		 1304#endif
1305}
Serial port access library