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