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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> |
74510d4b | 32 | #else |
74510d4b ML |
33 | #include <termios.h> |
34 | #include <sys/ioctl.h> | |
35 | #endif | |
3b63f34d | 36 | #ifdef __APPLE__ |
1ebf4347 ML |
37 | #include <IOKit/IOKitLib.h> |
38 | #include <IOKit/serial/IOSerialKeys.h> | |
39 | #include <sys/syslimits.h> | |
3b63f34d ML |
40 | #endif |
41 | #ifdef __linux__ | |
42 | #include "libudev.h" | |
4b97c9fc | 43 | #include "linux/serial.h" |
3b63f34d | 44 | #endif |
74510d4b ML |
45 | |
46 | #include "serialport.h" | |
47 | ||
77f262c4 | 48 | int sp_get_port_by_name(const char *portname, struct sp_port **port_ptr) |
d54e9004 ML |
49 | { |
50 | struct sp_port *port; | |
5919c913 | 51 | int len; |
d54e9004 | 52 | |
77f262c4 ML |
53 | *port_ptr = NULL; |
54 | ||
d4babed2 | 55 | if (!portname) |
77f262c4 | 56 | return SP_ERR_ARG; |
d4babed2 | 57 | |
d54e9004 | 58 | if (!(port = malloc(sizeof(struct sp_port)))) |
77f262c4 | 59 | return SP_ERR_MEM; |
d54e9004 | 60 | |
5919c913 ML |
61 | len = strlen(portname) + 1; |
62 | ||
d54e9004 ML |
63 | if (!(port->name = malloc(len))) |
64 | { | |
65 | free(port); | |
77f262c4 | 66 | return SP_ERR_MEM; |
d54e9004 ML |
67 | } |
68 | ||
69 | memcpy(port->name, portname, len); | |
70 | ||
77f262c4 ML |
71 | *port_ptr = port; |
72 | ||
73 | return SP_OK; | |
d54e9004 ML |
74 | } |
75 | ||
5919c913 | 76 | static struct sp_port **sp_list_append(struct sp_port **list, const char *portname) |
3b63f34d ML |
77 | { |
78 | void *tmp; | |
79 | unsigned int count; | |
80 | for (count = 0; list[count]; count++); | |
d54e9004 | 81 | if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2)))) |
3b63f34d ML |
82 | goto fail; |
83 | list = tmp; | |
77f262c4 | 84 | if (sp_get_port_by_name(portname, &list[count]) != SP_OK) |
3b63f34d | 85 | goto fail; |
db2794ce | 86 | list[count + 1] = NULL; |
3b63f34d ML |
87 | return list; |
88 | fail: | |
89 | sp_free_port_list(list); | |
90 | return NULL; | |
91 | } | |
92 | ||
68ab64cc ML |
93 | /** |
94 | * List the serial ports available on the system. | |
95 | * | |
96 | * @return A null-terminated array of port name strings. | |
97 | */ | |
77f262c4 | 98 | int sp_list_ports(struct sp_port ***list_ptr) |
3b63f34d | 99 | { |
d54e9004 | 100 | struct sp_port **list; |
77f262c4 | 101 | int ret = SP_OK; |
24c1a4bb | 102 | |
d54e9004 | 103 | if (!(list = malloc(sizeof(struct sp_port **)))) |
77f262c4 | 104 | return SP_ERR_MEM;; |
24c1a4bb ML |
105 | |
106 | list[0] = NULL; | |
3b63f34d ML |
107 | |
108 | #ifdef _WIN32 | |
109 | HKEY key; | |
bdfb5b8c ML |
110 | TCHAR *value, *data; |
111 | DWORD max_value_len, max_data_size, max_data_len; | |
112 | DWORD value_len, data_size, data_len; | |
3b63f34d | 113 | DWORD type, index = 0; |
8b532d9c ML |
114 | char *name; |
115 | int name_len; | |
3b63f34d ML |
116 | |
117 | if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"), | |
118 | 0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS) | |
77f262c4 ML |
119 | { |
120 | ret = SP_ERR_FAIL; | |
121 | goto out_done; | |
122 | } | |
3b63f34d | 123 | if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
bdfb5b8c | 124 | &max_value_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS) |
77f262c4 ML |
125 | { |
126 | ret = SP_ERR_FAIL; | |
3b63f34d | 127 | goto out_close; |
77f262c4 | 128 | } |
3b63f34d | 129 | max_data_len = max_data_size / sizeof(TCHAR); |
bdfb5b8c | 130 | if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) |
77f262c4 ML |
131 | { |
132 | ret = SP_ERR_MEM; | |
3b63f34d | 133 | goto out_close; |
77f262c4 | 134 | } |
3b63f34d | 135 | if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) |
77f262c4 ML |
136 | { |
137 | ret = SP_ERR_MEM; | |
bdfb5b8c | 138 | goto out_free_value; |
77f262c4 | 139 | } |
3b63f34d | 140 | while ( |
bdfb5b8c | 141 | value_len = max_value_len, |
3b63f34d | 142 | data_size = max_data_size, |
bdfb5b8c | 143 | RegEnumValue(key, index, value, &value_len, |
3b63f34d ML |
144 | NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS) |
145 | { | |
146 | data_len = data_size / sizeof(TCHAR); | |
147 | data[data_len] = '\0'; | |
8b532d9c ML |
148 | #ifdef UNICODE |
149 | name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL) | |
150 | #else | |
151 | name_len = data_len + 1; | |
152 | #endif | |
153 | if (!(name = malloc(name_len))) | |
77f262c4 ML |
154 | { |
155 | ret = SP_ERR_MEM; | |
8b532d9c | 156 | goto out; |
77f262c4 | 157 | } |
8b532d9c ML |
158 | #ifdef UNICODE |
159 | WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL); | |
160 | #else | |
161 | strcpy(name, data); | |
162 | #endif | |
77f262c4 ML |
163 | if (type == REG_SZ && !(list = sp_list_append(list, name))) |
164 | { | |
165 | ret = SP_ERR_MEM; | |
166 | goto out; | |
167 | } | |
3b63f34d ML |
168 | index++; |
169 | } | |
170 | out: | |
171 | free(data); | |
bdfb5b8c ML |
172 | out_free_value: |
173 | free(value); | |
3b63f34d ML |
174 | out_close: |
175 | RegCloseKey(key); | |
77f262c4 | 176 | out_done: |
3b63f34d ML |
177 | #endif |
178 | #ifdef __APPLE__ | |
179 | mach_port_t master; | |
180 | CFMutableDictionaryRef classes; | |
181 | io_iterator_t iter; | |
182 | char *path; | |
183 | io_object_t port; | |
184 | CFTypeRef cf_path; | |
185 | Boolean result; | |
186 | ||
187 | if (IOMasterPort(MACH_PORT_NULL, &master) != KERN_SUCCESS) | |
77f262c4 ML |
188 | { |
189 | ret = SP_ERR_FAIL; | |
190 | goto out_done; | |
191 | } | |
3b63f34d ML |
192 | |
193 | if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue))) | |
77f262c4 ML |
194 | { |
195 | ret = SP_ERR_FAIL; | |
196 | goto out_done; | |
197 | } | |
3b63f34d ML |
198 | |
199 | CFDictionarySetValue(classes, | |
200 | CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDAllTypes)); | |
201 | ||
202 | if (!(IOServiceGetMatchingServices(master, classes, &iter))) | |
77f262c4 ML |
203 | { |
204 | ret = SP_ERR_FAIL; | |
205 | goto out_done; | |
206 | } | |
3b63f34d ML |
207 | |
208 | if (!(path = malloc(PATH_MAX))) | |
77f262c4 ML |
209 | { |
210 | ret = SP_ERR_MEM; | |
3b63f34d | 211 | goto out_release; |
77f262c4 | 212 | } |
3b63f34d | 213 | |
1ebf4347 | 214 | while ((port = IOIteratorNext(iter))) { |
3b63f34d ML |
215 | cf_path = IORegistryEntryCreateCFProperty(port, |
216 | CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0); | |
217 | if (cf_path) { | |
218 | result = CFStringGetCString(cf_path, | |
219 | path, PATH_MAX, kCFStringEncodingASCII); | |
220 | CFRelease(cf_path); | |
77f262c4 ML |
221 | if (result && !(list = sp_list_append(list, path))) |
222 | { | |
223 | ret = SP_ERR_MEM; | |
224 | IOObjectRelease(port); | |
225 | goto out; | |
226 | } | |
3b63f34d ML |
227 | } |
228 | IOObjectRelease(port); | |
229 | } | |
3b63f34d ML |
230 | out: |
231 | free(path); | |
232 | out_release: | |
233 | IOObjectRelease(iter); | |
77f262c4 | 234 | out_done: |
3b63f34d ML |
235 | #endif |
236 | #ifdef __linux__ | |
237 | struct udev *ud; | |
238 | struct udev_enumerate *ud_enumerate; | |
239 | struct udev_list_entry *ud_list; | |
240 | struct udev_list_entry *ud_entry; | |
241 | const char *path; | |
08fe0bdb | 242 | struct udev_device *ud_dev, *ud_parent; |
3b63f34d | 243 | const char *name; |
4b97c9fc ML |
244 | const char *driver; |
245 | int fd, ioctl_result; | |
246 | struct serial_struct serial_info; | |
3b63f34d ML |
247 | |
248 | ud = udev_new(); | |
249 | ud_enumerate = udev_enumerate_new(ud); | |
250 | udev_enumerate_add_match_subsystem(ud_enumerate, "tty"); | |
251 | udev_enumerate_scan_devices(ud_enumerate); | |
252 | ud_list = udev_enumerate_get_list_entry(ud_enumerate); | |
3b63f34d ML |
253 | udev_list_entry_foreach(ud_entry, ud_list) |
254 | { | |
255 | path = udev_list_entry_get_name(ud_entry); | |
256 | ud_dev = udev_device_new_from_syspath(ud, path); | |
08fe0bdb ML |
257 | /* If there is no parent device, this is a virtual tty. */ |
258 | ud_parent = udev_device_get_parent(ud_dev); | |
259 | if (ud_parent == NULL) | |
260 | { | |
261 | udev_device_unref(ud_dev); | |
262 | continue; | |
263 | } | |
3b63f34d | 264 | name = udev_device_get_devnode(ud_dev); |
4b97c9fc ML |
265 | /* The serial8250 driver has a hardcoded number of ports. |
266 | * The only way to tell which actually exist on a given system | |
267 | * is to try to open them and make an ioctl call. */ | |
268 | driver = udev_device_get_driver(ud_parent); | |
269 | if (driver && !strcmp(driver, "serial8250")) | |
270 | { | |
271 | if ((fd = open(name, O_RDWR | O_NONBLOCK | O_NOCTTY)) < 0) | |
272 | goto skip; | |
273 | ioctl_result = ioctl(fd, TIOCGSERIAL, &serial_info); | |
274 | close(fd); | |
275 | if (ioctl_result != 0) | |
276 | goto skip; | |
277 | if (serial_info.type == PORT_UNKNOWN) | |
278 | goto skip; | |
279 | } | |
5919c913 | 280 | list = sp_list_append(list, name); |
4b97c9fc | 281 | skip: |
3b63f34d ML |
282 | udev_device_unref(ud_dev); |
283 | if (!list) | |
77f262c4 ML |
284 | { |
285 | ret = SP_ERR_MEM; | |
3b63f34d | 286 | goto out; |
77f262c4 | 287 | } |
3b63f34d ML |
288 | } |
289 | out: | |
290 | udev_enumerate_unref(ud_enumerate); | |
291 | udev_unref(ud); | |
3b63f34d | 292 | #endif |
77f262c4 ML |
293 | |
294 | if (ret == SP_OK) | |
295 | { | |
296 | *list_ptr = list; | |
297 | } | |
298 | else | |
299 | { | |
300 | if (list) | |
301 | sp_free_port_list(list); | |
302 | ||
303 | *list_ptr = NULL; | |
304 | } | |
305 | ||
306 | return ret; | |
3b63f34d ML |
307 | } |
308 | ||
68ab64cc ML |
309 | /** |
310 | * Free a port list returned by sp_list_ports. | |
311 | */ | |
d54e9004 | 312 | void sp_free_port_list(struct sp_port **list) |
3b63f34d ML |
313 | { |
314 | unsigned int i; | |
315 | for (i = 0; list[i]; i++) | |
316 | free(list[i]); | |
317 | free(list); | |
318 | } | |
319 | ||
74510d4b ML |
320 | static int sp_validate_port(struct sp_port *port) |
321 | { | |
322 | if (port == NULL) | |
323 | return 0; | |
324 | #ifdef _WIN32 | |
325 | if (port->hdl == INVALID_HANDLE_VALUE) | |
326 | return 0; | |
327 | #else | |
328 | if (port->fd < 0) | |
329 | return 0; | |
330 | #endif | |
331 | return 1; | |
332 | } | |
333 | ||
334 | #define CHECK_PORT() do { if (!sp_validate_port(port)) return SP_ERR_ARG; } while (0) | |
335 | ||
336 | /** | |
337 | * Open the specified serial port. | |
338 | * | |
339 | * @param port Pointer to empty port structure allocated by caller. | |
340 | * @param portname Name of port to open. | |
341 | * @param flags Flags to use when opening the serial port. Possible flags | |
342 | * are: SP_MODE_RDWR, SP_MODE_RDONLY, SP_MODE_NONBLOCK. | |
343 | * | |
344 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
345 | * or SP_ERR_ARG if an invalid port or name is passed. | |
346 | */ | |
d54e9004 | 347 | int sp_open(struct sp_port *port, int flags) |
74510d4b ML |
348 | { |
349 | if (!port) | |
350 | return SP_ERR_ARG; | |
351 | ||
74510d4b ML |
352 | #ifdef _WIN32 |
353 | DWORD desired_access = 0, flags_and_attributes = 0; | |
354 | /* Map 'flags' to the OS-specific settings. */ | |
355 | desired_access |= GENERIC_READ; | |
356 | flags_and_attributes = FILE_ATTRIBUTE_NORMAL; | |
357 | if (flags & SP_MODE_RDWR) | |
358 | desired_access |= GENERIC_WRITE; | |
359 | if (flags & SP_MODE_NONBLOCK) | |
360 | flags_and_attributes |= FILE_FLAG_OVERLAPPED; | |
361 | ||
362 | port->hdl = CreateFile(port->name, desired_access, 0, 0, | |
363 | OPEN_EXISTING, flags_and_attributes, 0); | |
364 | if (port->hdl == INVALID_HANDLE_VALUE) | |
365 | return SP_ERR_FAIL; | |
366 | #else | |
367 | int flags_local = 0; | |
368 | /* Map 'flags' to the OS-specific settings. */ | |
369 | if (flags & SP_MODE_RDWR) | |
370 | flags_local |= O_RDWR; | |
371 | if (flags & SP_MODE_RDONLY) | |
372 | flags_local |= O_RDONLY; | |
373 | if (flags & SP_MODE_NONBLOCK) | |
374 | flags_local |= O_NONBLOCK; | |
375 | ||
376 | if ((port->fd = open(port->name, flags_local)) < 0) | |
377 | return SP_ERR_FAIL; | |
378 | #endif | |
379 | ||
380 | return SP_OK; | |
381 | } | |
382 | ||
383 | /** | |
384 | * Close the specified serial port. | |
385 | * | |
386 | * @param port Pointer to port structure. | |
387 | * | |
388 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
389 | * or SP_ERR_ARG if an invalid port is passed. | |
390 | */ | |
391 | int sp_close(struct sp_port *port) | |
392 | { | |
393 | CHECK_PORT(); | |
394 | ||
395 | #ifdef _WIN32 | |
396 | /* Returns non-zero upon success, 0 upon failure. */ | |
397 | if (CloseHandle(port->hdl) == 0) | |
398 | return SP_ERR_FAIL; | |
399 | #else | |
400 | /* Returns 0 upon success, -1 upon failure. */ | |
401 | if (close(port->fd) == -1) | |
402 | return SP_ERR_FAIL; | |
403 | #endif | |
404 | ||
405 | return SP_OK; | |
406 | } | |
407 | ||
408 | /** | |
409 | * Flush serial port buffers. | |
410 | * | |
411 | * @param port Pointer to port structure. | |
412 | * | |
413 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
414 | * or SP_ERR_ARG if an invalid port is passed. | |
415 | */ | |
416 | int sp_flush(struct sp_port *port) | |
417 | { | |
418 | CHECK_PORT(); | |
419 | ||
420 | #ifdef _WIN32 | |
421 | /* Returns non-zero upon success, 0 upon failure. */ | |
422 | if (PurgeComm(port->hdl, PURGE_RXCLEAR | PURGE_TXCLEAR) == 0) | |
423 | return SP_ERR_FAIL; | |
424 | #else | |
425 | /* Returns 0 upon success, -1 upon failure. */ | |
426 | if (tcflush(port->fd, TCIOFLUSH) < 0) | |
427 | return SP_ERR_FAIL; | |
428 | #endif | |
429 | return SP_OK; | |
430 | } | |
431 | ||
432 | /** | |
433 | * Write a number of bytes to the specified serial port. | |
434 | * | |
435 | * @param port Pointer to port structure. | |
436 | * @param buf Buffer containing the bytes to write. | |
437 | * @param count Number of bytes to write. | |
438 | * | |
439 | * @return The number of bytes written, SP_ERR_FAIL on failure, | |
440 | * or SP_ERR_ARG if an invalid port is passed. | |
441 | */ | |
442 | int sp_write(struct sp_port *port, const void *buf, size_t count) | |
443 | { | |
444 | CHECK_PORT(); | |
445 | ||
446 | if (!buf) | |
447 | return SP_ERR_ARG; | |
448 | ||
449 | #ifdef _WIN32 | |
450 | DWORD written = 0; | |
451 | /* Returns non-zero upon success, 0 upon failure. */ | |
452 | if (WriteFile(port->hdl, buf, count, &written, NULL) == 0) | |
453 | return SP_ERR_FAIL; | |
454 | return written; | |
455 | #else | |
456 | /* Returns the number of bytes written, or -1 upon failure. */ | |
457 | ssize_t written = write(port->fd, buf, count); | |
458 | if (written < 0) | |
459 | return SP_ERR_FAIL; | |
460 | else | |
461 | return written;; | |
462 | #endif | |
463 | } | |
464 | ||
465 | /** | |
466 | * Read a number of bytes from the specified serial port. | |
467 | * | |
468 | * @param port Pointer to port structure. | |
469 | * @param buf Buffer where to store the bytes that are read. | |
470 | * @param count The number of bytes to read. | |
471 | * | |
472 | * @return The number of bytes read, SP_ERR_FAIL on failure, | |
473 | * or SP_ERR_ARG if an invalid port is passed. | |
474 | */ | |
475 | int sp_read(struct sp_port *port, void *buf, size_t count) | |
476 | { | |
477 | CHECK_PORT(); | |
478 | ||
479 | if (!buf) | |
480 | return SP_ERR_ARG; | |
481 | ||
482 | #ifdef _WIN32 | |
483 | DWORD bytes_read = 0; | |
484 | /* Returns non-zero upon success, 0 upon failure. */ | |
485 | if (ReadFile(port->hdl, buf, count, &bytes_read, NULL) == 0) | |
486 | return SP_ERR_FAIL; | |
487 | return bytes_read; | |
488 | #else | |
489 | ssize_t bytes_read; | |
490 | /* Returns the number of bytes read, or -1 upon failure. */ | |
491 | if ((bytes_read = read(port->fd, buf, count)) < 0) | |
492 | return SP_ERR_FAIL; | |
493 | return bytes_read; | |
494 | #endif | |
495 | } | |
496 | ||
497 | /** | |
498 | * Set serial parameters for the specified serial port. | |
499 | * | |
500 | * @param port Pointer to port structure. | |
501 | * @param baudrate The baudrate to set. | |
502 | * @param bits The number of data bits to use. | |
503 | * @param parity The parity setting to use (0 = none, 1 = even, 2 = odd). | |
504 | * @param stopbits The number of stop bits to use (1 or 2). | |
505 | * @param flowcontrol The flow control settings to use (0 = none, 1 = RTS/CTS, | |
506 | * 2 = XON/XOFF). | |
507 | * | |
508 | * @return The number of bytes read, SP_ERR_FAIL on failure, | |
509 | * or SP_ERR_ARG if an invalid argument is passed. | |
510 | */ | |
511 | int sp_set_params(struct sp_port *port, int baudrate, | |
512 | int bits, int parity, int stopbits, | |
513 | int flowcontrol, int rts, int dtr) | |
514 | { | |
515 | CHECK_PORT(); | |
516 | ||
517 | #ifdef _WIN32 | |
518 | DCB dcb; | |
519 | ||
520 | if (!GetCommState(port->hdl, &dcb)) | |
521 | return SP_ERR_FAIL; | |
522 | ||
523 | switch (baudrate) { | |
524 | /* | |
525 | * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to | |
526 | * have documented CBR_* macros. | |
527 | */ | |
528 | case 110: | |
529 | dcb.BaudRate = CBR_110; | |
530 | break; | |
531 | case 300: | |
532 | dcb.BaudRate = CBR_300; | |
533 | break; | |
534 | case 600: | |
535 | dcb.BaudRate = CBR_600; | |
536 | break; | |
537 | case 1200: | |
538 | dcb.BaudRate = CBR_1200; | |
539 | break; | |
540 | case 2400: | |
541 | dcb.BaudRate = CBR_2400; | |
542 | break; | |
543 | case 4800: | |
544 | dcb.BaudRate = CBR_4800; | |
545 | break; | |
546 | case 9600: | |
547 | dcb.BaudRate = CBR_9600; | |
548 | break; | |
549 | case 14400: | |
550 | dcb.BaudRate = CBR_14400; /* Not available on Unix? */ | |
551 | break; | |
552 | case 19200: | |
553 | dcb.BaudRate = CBR_19200; | |
554 | break; | |
555 | case 38400: | |
556 | dcb.BaudRate = CBR_38400; | |
557 | break; | |
558 | case 57600: | |
559 | dcb.BaudRate = CBR_57600; | |
560 | break; | |
561 | case 115200: | |
562 | dcb.BaudRate = CBR_115200; | |
563 | break; | |
564 | case 128000: | |
565 | dcb.BaudRate = CBR_128000; /* Not available on Unix? */ | |
566 | break; | |
567 | case 256000: | |
568 | dcb.BaudRate = CBR_256000; /* Not available on Unix? */ | |
569 | break; | |
570 | default: | |
571 | return SP_ERR_ARG; | |
572 | } | |
573 | ||
574 | switch (stopbits) { | |
575 | /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */ | |
576 | case 1: | |
577 | dcb.StopBits = ONESTOPBIT; | |
578 | break; | |
579 | case 2: | |
580 | dcb.StopBits = TWOSTOPBITS; | |
581 | break; | |
582 | default: | |
583 | return SP_ERR_ARG; | |
584 | } | |
585 | ||
586 | switch (parity) { | |
587 | /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */ | |
588 | case SP_PARITY_NONE: | |
589 | dcb.Parity = NOPARITY; | |
590 | break; | |
591 | case SP_PARITY_EVEN: | |
592 | dcb.Parity = EVENPARITY; | |
593 | break; | |
594 | case SP_PARITY_ODD: | |
595 | dcb.Parity = ODDPARITY; | |
596 | break; | |
597 | default: | |
598 | return SP_ERR_ARG; | |
599 | } | |
600 | ||
601 | if (rts != -1) { | |
602 | if (rts) | |
603 | dcb.fRtsControl = RTS_CONTROL_ENABLE; | |
604 | else | |
605 | dcb.fRtsControl = RTS_CONTROL_DISABLE; | |
606 | } | |
607 | ||
608 | if (dtr != -1) { | |
609 | if (dtr) | |
610 | dcb.fDtrControl = DTR_CONTROL_ENABLE; | |
611 | else | |
612 | dcb.fDtrControl = DTR_CONTROL_DISABLE; | |
613 | } | |
614 | ||
615 | if (!SetCommState(port->hdl, &dcb)) | |
616 | return SP_ERR_FAIL; | |
617 | #else | |
618 | struct termios term; | |
619 | speed_t baud; | |
620 | int controlbits; | |
621 | ||
622 | if (tcgetattr(port->fd, &term) < 0) | |
623 | return SP_ERR_FAIL; | |
624 | ||
625 | switch (baudrate) { | |
626 | case 50: | |
627 | baud = B50; | |
628 | break; | |
629 | case 75: | |
630 | baud = B75; | |
631 | break; | |
632 | case 110: | |
633 | baud = B110; | |
634 | break; | |
635 | case 134: | |
636 | baud = B134; | |
637 | break; | |
638 | case 150: | |
639 | baud = B150; | |
640 | break; | |
641 | case 200: | |
642 | baud = B200; | |
643 | break; | |
644 | case 300: | |
645 | baud = B300; | |
646 | break; | |
647 | case 600: | |
648 | baud = B600; | |
649 | break; | |
650 | case 1200: | |
651 | baud = B1200; | |
652 | break; | |
653 | case 1800: | |
654 | baud = B1800; | |
655 | break; | |
656 | case 2400: | |
657 | baud = B2400; | |
658 | break; | |
659 | case 4800: | |
660 | baud = B4800; | |
661 | break; | |
662 | case 9600: | |
663 | baud = B9600; | |
664 | break; | |
665 | case 19200: | |
666 | baud = B19200; | |
667 | break; | |
668 | case 38400: | |
669 | baud = B38400; | |
670 | break; | |
671 | case 57600: | |
672 | baud = B57600; | |
673 | break; | |
674 | case 115200: | |
675 | baud = B115200; | |
676 | break; | |
677 | case 230400: | |
678 | baud = B230400; | |
679 | break; | |
680 | #if !defined(__APPLE__) && !defined(__OpenBSD__) | |
681 | case 460800: | |
682 | baud = B460800; | |
683 | break; | |
684 | #endif | |
685 | default: | |
686 | return SP_ERR_ARG; | |
687 | } | |
688 | ||
689 | if (cfsetospeed(&term, baud) < 0) | |
690 | return SP_ERR_FAIL; | |
691 | ||
692 | if (cfsetispeed(&term, baud) < 0) | |
693 | return SP_ERR_FAIL; | |
694 | ||
695 | term.c_cflag &= ~CSIZE; | |
696 | switch (bits) { | |
697 | case 8: | |
698 | term.c_cflag |= CS8; | |
699 | break; | |
700 | case 7: | |
701 | term.c_cflag |= CS7; | |
702 | break; | |
703 | default: | |
704 | return SP_ERR_ARG; | |
705 | } | |
706 | ||
707 | term.c_cflag &= ~CSTOPB; | |
708 | switch (stopbits) { | |
709 | case 1: | |
710 | term.c_cflag &= ~CSTOPB; | |
711 | break; | |
712 | case 2: | |
713 | term.c_cflag |= CSTOPB; | |
714 | break; | |
715 | default: | |
716 | return SP_ERR_ARG; | |
717 | } | |
718 | ||
8683177b | 719 | term.c_iflag &= ~(IXON | IXOFF | IXANY); |
74510d4b ML |
720 | term.c_cflag &= ~CRTSCTS; |
721 | switch (flowcontrol) { | |
722 | case 0: | |
723 | /* No flow control. */ | |
724 | break; | |
725 | case 1: | |
726 | term.c_cflag |= CRTSCTS; | |
727 | break; | |
728 | case 2: | |
8683177b | 729 | term.c_iflag |= IXON | IXOFF | IXANY; |
74510d4b ML |
730 | break; |
731 | default: | |
732 | return SP_ERR_ARG; | |
733 | } | |
734 | ||
735 | term.c_iflag &= ~IGNPAR; | |
8683177b | 736 | term.c_cflag &= ~(PARENB | PARODD); |
74510d4b ML |
737 | switch (parity) { |
738 | case SP_PARITY_NONE: | |
739 | term.c_iflag |= IGNPAR; | |
740 | break; | |
741 | case SP_PARITY_EVEN: | |
742 | term.c_cflag |= PARENB; | |
743 | break; | |
744 | case SP_PARITY_ODD: | |
745 | term.c_cflag |= PARENB | PARODD; | |
746 | break; | |
747 | default: | |
748 | return SP_ERR_ARG; | |
749 | } | |
750 | ||
751 | /* Turn off all serial port cooking. */ | |
752 | term.c_iflag &= ~(ISTRIP | INLCR | ICRNL); | |
753 | term.c_oflag &= ~(ONLCR | OCRNL | ONOCR); | |
754 | #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) | |
755 | term.c_oflag &= ~OFILL; | |
756 | #endif | |
757 | ||
758 | /* Disable canonical mode, and don't echo input characters. */ | |
759 | term.c_lflag &= ~(ICANON | ECHO); | |
760 | ||
8683177b ML |
761 | /* Ignore modem status lines; enable receiver */ |
762 | term.c_cflag |= (CLOCAL | CREAD); | |
763 | ||
74510d4b ML |
764 | /* Write the configured settings. */ |
765 | if (tcsetattr(port->fd, TCSADRAIN, &term) < 0) | |
766 | return SP_ERR_FAIL; | |
767 | ||
768 | if (rts != -1) { | |
769 | controlbits = TIOCM_RTS; | |
770 | if (ioctl(port->fd, rts ? TIOCMBIS : TIOCMBIC, | |
771 | &controlbits) < 0) | |
772 | return SP_ERR_FAIL; | |
773 | } | |
774 | ||
775 | if (dtr != -1) { | |
776 | controlbits = TIOCM_DTR; | |
777 | if (ioctl(port->fd, dtr ? TIOCMBIS : TIOCMBIC, | |
778 | &controlbits) < 0) | |
779 | return SP_ERR_FAIL; | |
780 | } | |
781 | #endif | |
782 | ||
783 | return SP_OK; | |
784 | } | |
785 | ||
786 | /** | |
787 | * Get error code for failed operation. | |
788 | * | |
789 | * In order to obtain the correct result, this function should be called | |
790 | * straight after the failure, before executing any other system operations. | |
791 | * | |
792 | * @return The system's numeric code for the error that caused the last | |
793 | * operation to fail. | |
794 | */ | |
795 | int sp_last_error_code(void) | |
796 | { | |
797 | #ifdef _WIN32 | |
798 | return GetLastError(); | |
799 | #else | |
800 | return errno; | |
801 | #endif | |
802 | } | |
803 | ||
804 | /** | |
805 | * Get error message for failed operation. | |
806 | * | |
807 | * In order to obtain the correct result, this function should be called | |
808 | * straight after the failure, before executing other system operations. | |
809 | * | |
810 | * @return The system's message for the error that caused the last | |
811 | * operation to fail. This string may be allocated by the function, | |
812 | * and can be freed after use by calling sp_free_error_message. | |
813 | */ | |
814 | char *sp_last_error_message(void) | |
815 | { | |
816 | #ifdef _WIN32 | |
817 | LPVOID message; | |
818 | DWORD error = GetLastError(); | |
819 | ||
820 | FormatMessage( | |
821 | FORMAT_MESSAGE_ALLOCATE_BUFFER | | |
822 | FORMAT_MESSAGE_FROM_SYSTEM | | |
823 | FORMAT_MESSAGE_IGNORE_INSERTS, | |
824 | NULL, | |
825 | error, | |
826 | MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), | |
827 | (LPTSTR) &message, | |
828 | 0, NULL ); | |
829 | ||
830 | return message; | |
831 | #else | |
832 | return strerror(errno); | |
833 | #endif | |
834 | } | |
835 | ||
836 | /** | |
837 | * Free error message. | |
838 | * | |
839 | * This function can be used to free a string returned by the | |
840 | * sp_last_error_message function. | |
841 | */ | |
842 | void sp_free_error_message(char *message) | |
843 | { | |
844 | #ifdef _WIN32 | |
845 | LocalFree(message); | |
64eec30d ML |
846 | #else |
847 | (void)message; | |
74510d4b ML |
848 | #endif |
849 | } |