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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 | |
8094e4a0 ML |
49 | struct sp_port_data { |
50 | #ifdef _WIN32 | |
51 | DCB dcb; | |
52 | #else | |
53 | struct termios term; | |
8094e4a0 | 54 | int rts; |
d514a26f | 55 | int cts; |
8094e4a0 | 56 | int dtr; |
d514a26f | 57 | int dsr; |
8094e4a0 ML |
58 | #endif |
59 | }; | |
60 | ||
80186526 ML |
61 | /* Helper functions for configuring ports. */ |
62 | static int start_config(struct sp_port *port, struct sp_port_data *data); | |
63 | static int set_baudrate(struct sp_port_data *data, int baudrate); | |
64 | static int set_bits(struct sp_port_data *data, int bits); | |
65 | static int set_parity(struct sp_port_data *data, int parity); | |
66 | static int set_stopbits(struct sp_port_data *data, int stopbits); | |
67 | static int set_rts(struct sp_port_data *data, int rts); | |
68 | static int set_cts(struct sp_port_data *data, int cts); | |
69 | static int set_dtr(struct sp_port_data *data, int dtr); | |
70 | static int set_dsr(struct sp_port_data *data, int dsr); | |
71 | static int set_xon_xoff(struct sp_port_data *data, int xon_xoff); | |
72 | static int apply_config(struct sp_port *port, struct sp_port_data *data); | |
73 | ||
77f262c4 | 74 | int sp_get_port_by_name(const char *portname, struct sp_port **port_ptr) |
d54e9004 ML |
75 | { |
76 | struct sp_port *port; | |
5919c913 | 77 | int len; |
d54e9004 | 78 | |
32b5ac05 ML |
79 | if (!port_ptr) |
80 | return SP_ERR_ARG; | |
81 | ||
77f262c4 ML |
82 | *port_ptr = NULL; |
83 | ||
d4babed2 | 84 | if (!portname) |
77f262c4 | 85 | return SP_ERR_ARG; |
d4babed2 | 86 | |
d54e9004 | 87 | if (!(port = malloc(sizeof(struct sp_port)))) |
77f262c4 | 88 | return SP_ERR_MEM; |
d54e9004 | 89 | |
5919c913 ML |
90 | len = strlen(portname) + 1; |
91 | ||
d54e9004 ML |
92 | if (!(port->name = malloc(len))) |
93 | { | |
94 | free(port); | |
77f262c4 | 95 | return SP_ERR_MEM; |
d54e9004 ML |
96 | } |
97 | ||
98 | memcpy(port->name, portname, len); | |
99 | ||
77f262c4 ML |
100 | *port_ptr = port; |
101 | ||
102 | return SP_OK; | |
d54e9004 ML |
103 | } |
104 | ||
32b5ac05 ML |
105 | int sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr) |
106 | { | |
107 | if (!copy_ptr) | |
108 | return SP_ERR_ARG; | |
109 | ||
110 | *copy_ptr = NULL; | |
111 | ||
112 | if (!port || !port->name) | |
113 | return SP_ERR_ARG; | |
114 | ||
115 | return sp_get_port_by_name(port->name, copy_ptr); | |
116 | } | |
117 | ||
e3b2f7a4 ML |
118 | void sp_free_port(struct sp_port *port) |
119 | { | |
120 | if (!port) | |
121 | return; | |
122 | ||
123 | if (port->name) | |
124 | free(port->name); | |
125 | ||
126 | free(port); | |
127 | } | |
128 | ||
5919c913 | 129 | static struct sp_port **sp_list_append(struct sp_port **list, const char *portname) |
3b63f34d ML |
130 | { |
131 | void *tmp; | |
132 | unsigned int count; | |
f92f1f0c | 133 | |
3b63f34d | 134 | for (count = 0; list[count]; count++); |
d54e9004 | 135 | if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2)))) |
3b63f34d ML |
136 | goto fail; |
137 | list = tmp; | |
77f262c4 | 138 | if (sp_get_port_by_name(portname, &list[count]) != SP_OK) |
3b63f34d | 139 | goto fail; |
db2794ce | 140 | list[count + 1] = NULL; |
3b63f34d | 141 | return list; |
f92f1f0c | 142 | |
3b63f34d ML |
143 | fail: |
144 | sp_free_port_list(list); | |
145 | return NULL; | |
146 | } | |
147 | ||
77f262c4 | 148 | int sp_list_ports(struct sp_port ***list_ptr) |
3b63f34d | 149 | { |
d54e9004 | 150 | struct sp_port **list; |
77f262c4 | 151 | int ret = SP_OK; |
24c1a4bb | 152 | |
d54e9004 | 153 | if (!(list = malloc(sizeof(struct sp_port **)))) |
f92f1f0c | 154 | return SP_ERR_MEM; |
24c1a4bb ML |
155 | |
156 | list[0] = NULL; | |
3b63f34d ML |
157 | |
158 | #ifdef _WIN32 | |
159 | HKEY key; | |
bdfb5b8c ML |
160 | TCHAR *value, *data; |
161 | DWORD max_value_len, max_data_size, max_data_len; | |
162 | DWORD value_len, data_size, data_len; | |
3b63f34d | 163 | DWORD type, index = 0; |
8b532d9c ML |
164 | char *name; |
165 | int name_len; | |
3b63f34d ML |
166 | |
167 | if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"), | |
168 | 0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS) | |
77f262c4 ML |
169 | { |
170 | ret = SP_ERR_FAIL; | |
171 | goto out_done; | |
172 | } | |
3b63f34d | 173 | if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
bdfb5b8c | 174 | &max_value_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS) |
77f262c4 ML |
175 | { |
176 | ret = SP_ERR_FAIL; | |
3b63f34d | 177 | goto out_close; |
77f262c4 | 178 | } |
3b63f34d | 179 | max_data_len = max_data_size / sizeof(TCHAR); |
bdfb5b8c | 180 | if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) |
77f262c4 ML |
181 | { |
182 | ret = SP_ERR_MEM; | |
3b63f34d | 183 | goto out_close; |
77f262c4 | 184 | } |
3b63f34d | 185 | if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) |
77f262c4 ML |
186 | { |
187 | ret = SP_ERR_MEM; | |
bdfb5b8c | 188 | goto out_free_value; |
77f262c4 | 189 | } |
3b63f34d | 190 | while ( |
d9573bad | 191 | value_len = max_value_len + 1, |
3b63f34d | 192 | data_size = max_data_size, |
bdfb5b8c | 193 | RegEnumValue(key, index, value, &value_len, |
3b63f34d ML |
194 | NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS) |
195 | { | |
196 | data_len = data_size / sizeof(TCHAR); | |
197 | data[data_len] = '\0'; | |
8b532d9c ML |
198 | #ifdef UNICODE |
199 | name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL) | |
200 | #else | |
201 | name_len = data_len + 1; | |
202 | #endif | |
203 | if (!(name = malloc(name_len))) | |
77f262c4 ML |
204 | { |
205 | ret = SP_ERR_MEM; | |
8b532d9c | 206 | goto out; |
77f262c4 | 207 | } |
8b532d9c ML |
208 | #ifdef UNICODE |
209 | WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL); | |
210 | #else | |
211 | strcpy(name, data); | |
212 | #endif | |
77f262c4 ML |
213 | if (type == REG_SZ && !(list = sp_list_append(list, name))) |
214 | { | |
215 | ret = SP_ERR_MEM; | |
216 | goto out; | |
217 | } | |
3b63f34d ML |
218 | index++; |
219 | } | |
220 | out: | |
221 | free(data); | |
bdfb5b8c ML |
222 | out_free_value: |
223 | free(value); | |
3b63f34d ML |
224 | out_close: |
225 | RegCloseKey(key); | |
77f262c4 | 226 | out_done: |
3b63f34d ML |
227 | #endif |
228 | #ifdef __APPLE__ | |
229 | mach_port_t master; | |
230 | CFMutableDictionaryRef classes; | |
231 | io_iterator_t iter; | |
232 | char *path; | |
233 | io_object_t port; | |
234 | CFTypeRef cf_path; | |
235 | Boolean result; | |
236 | ||
237 | if (IOMasterPort(MACH_PORT_NULL, &master) != KERN_SUCCESS) | |
77f262c4 ML |
238 | { |
239 | ret = SP_ERR_FAIL; | |
240 | goto out_done; | |
241 | } | |
3b63f34d ML |
242 | |
243 | if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue))) | |
77f262c4 ML |
244 | { |
245 | ret = SP_ERR_FAIL; | |
246 | goto out_done; | |
247 | } | |
3b63f34d ML |
248 | |
249 | CFDictionarySetValue(classes, | |
250 | CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDAllTypes)); | |
251 | ||
0d34b451 | 252 | if (IOServiceGetMatchingServices(master, classes, &iter) != KERN_SUCCESS) |
77f262c4 ML |
253 | { |
254 | ret = SP_ERR_FAIL; | |
255 | goto out_done; | |
256 | } | |
3b63f34d ML |
257 | |
258 | if (!(path = malloc(PATH_MAX))) | |
77f262c4 ML |
259 | { |
260 | ret = SP_ERR_MEM; | |
3b63f34d | 261 | goto out_release; |
77f262c4 | 262 | } |
3b63f34d | 263 | |
1ebf4347 | 264 | while ((port = IOIteratorNext(iter))) { |
3b63f34d ML |
265 | cf_path = IORegistryEntryCreateCFProperty(port, |
266 | CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0); | |
267 | if (cf_path) { | |
268 | result = CFStringGetCString(cf_path, | |
269 | path, PATH_MAX, kCFStringEncodingASCII); | |
270 | CFRelease(cf_path); | |
77f262c4 ML |
271 | if (result && !(list = sp_list_append(list, path))) |
272 | { | |
273 | ret = SP_ERR_MEM; | |
274 | IOObjectRelease(port); | |
275 | goto out; | |
276 | } | |
3b63f34d ML |
277 | } |
278 | IOObjectRelease(port); | |
279 | } | |
3b63f34d ML |
280 | out: |
281 | free(path); | |
282 | out_release: | |
283 | IOObjectRelease(iter); | |
77f262c4 | 284 | out_done: |
3b63f34d ML |
285 | #endif |
286 | #ifdef __linux__ | |
287 | struct udev *ud; | |
288 | struct udev_enumerate *ud_enumerate; | |
289 | struct udev_list_entry *ud_list; | |
290 | struct udev_list_entry *ud_entry; | |
291 | const char *path; | |
08fe0bdb | 292 | struct udev_device *ud_dev, *ud_parent; |
3b63f34d | 293 | const char *name; |
4b97c9fc ML |
294 | const char *driver; |
295 | int fd, ioctl_result; | |
296 | struct serial_struct serial_info; | |
3b63f34d ML |
297 | |
298 | ud = udev_new(); | |
299 | ud_enumerate = udev_enumerate_new(ud); | |
300 | udev_enumerate_add_match_subsystem(ud_enumerate, "tty"); | |
301 | udev_enumerate_scan_devices(ud_enumerate); | |
302 | ud_list = udev_enumerate_get_list_entry(ud_enumerate); | |
3b63f34d ML |
303 | udev_list_entry_foreach(ud_entry, ud_list) |
304 | { | |
305 | path = udev_list_entry_get_name(ud_entry); | |
306 | ud_dev = udev_device_new_from_syspath(ud, path); | |
08fe0bdb ML |
307 | /* If there is no parent device, this is a virtual tty. */ |
308 | ud_parent = udev_device_get_parent(ud_dev); | |
309 | if (ud_parent == NULL) | |
310 | { | |
311 | udev_device_unref(ud_dev); | |
312 | continue; | |
313 | } | |
3b63f34d | 314 | name = udev_device_get_devnode(ud_dev); |
4b97c9fc ML |
315 | /* The serial8250 driver has a hardcoded number of ports. |
316 | * The only way to tell which actually exist on a given system | |
317 | * is to try to open them and make an ioctl call. */ | |
318 | driver = udev_device_get_driver(ud_parent); | |
319 | if (driver && !strcmp(driver, "serial8250")) | |
320 | { | |
321 | if ((fd = open(name, O_RDWR | O_NONBLOCK | O_NOCTTY)) < 0) | |
322 | goto skip; | |
323 | ioctl_result = ioctl(fd, TIOCGSERIAL, &serial_info); | |
324 | close(fd); | |
325 | if (ioctl_result != 0) | |
326 | goto skip; | |
327 | if (serial_info.type == PORT_UNKNOWN) | |
328 | goto skip; | |
329 | } | |
5919c913 | 330 | list = sp_list_append(list, name); |
4b97c9fc | 331 | skip: |
3b63f34d ML |
332 | udev_device_unref(ud_dev); |
333 | if (!list) | |
77f262c4 ML |
334 | { |
335 | ret = SP_ERR_MEM; | |
3b63f34d | 336 | goto out; |
77f262c4 | 337 | } |
3b63f34d ML |
338 | } |
339 | out: | |
340 | udev_enumerate_unref(ud_enumerate); | |
341 | udev_unref(ud); | |
3b63f34d | 342 | #endif |
77f262c4 ML |
343 | |
344 | if (ret == SP_OK) | |
345 | { | |
346 | *list_ptr = list; | |
347 | } | |
348 | else | |
349 | { | |
350 | if (list) | |
351 | sp_free_port_list(list); | |
352 | ||
353 | *list_ptr = NULL; | |
354 | } | |
355 | ||
356 | return ret; | |
3b63f34d ML |
357 | } |
358 | ||
d54e9004 | 359 | void sp_free_port_list(struct sp_port **list) |
3b63f34d ML |
360 | { |
361 | unsigned int i; | |
f92f1f0c | 362 | |
3b63f34d | 363 | for (i = 0; list[i]; i++) |
e3b2f7a4 | 364 | sp_free_port(list[i]); |
3b63f34d ML |
365 | free(list); |
366 | } | |
367 | ||
74510d4b ML |
368 | static int sp_validate_port(struct sp_port *port) |
369 | { | |
370 | if (port == NULL) | |
371 | return 0; | |
372 | #ifdef _WIN32 | |
373 | if (port->hdl == INVALID_HANDLE_VALUE) | |
374 | return 0; | |
375 | #else | |
376 | if (port->fd < 0) | |
377 | return 0; | |
378 | #endif | |
379 | return 1; | |
380 | } | |
381 | ||
382 | #define CHECK_PORT() do { if (!sp_validate_port(port)) return SP_ERR_ARG; } while (0) | |
383 | ||
d54e9004 | 384 | int sp_open(struct sp_port *port, int flags) |
74510d4b ML |
385 | { |
386 | if (!port) | |
387 | return SP_ERR_ARG; | |
388 | ||
74510d4b ML |
389 | #ifdef _WIN32 |
390 | DWORD desired_access = 0, flags_and_attributes = 0; | |
99945a1f ML |
391 | char *escaped_port_name; |
392 | ||
393 | /* Prefix port name with '\\.\' to work with ports above COM9. */ | |
394 | if (!(escaped_port_name = malloc(strlen(port->name + 5)))) | |
395 | return SP_ERR_MEM; | |
396 | sprintf(escaped_port_name, "\\\\.\\%s", port->name); | |
397 | ||
74510d4b ML |
398 | /* Map 'flags' to the OS-specific settings. */ |
399 | desired_access |= GENERIC_READ; | |
400 | flags_and_attributes = FILE_ATTRIBUTE_NORMAL; | |
401 | if (flags & SP_MODE_RDWR) | |
402 | desired_access |= GENERIC_WRITE; | |
403 | if (flags & SP_MODE_NONBLOCK) | |
404 | flags_and_attributes |= FILE_FLAG_OVERLAPPED; | |
405 | ||
99945a1f | 406 | port->hdl = CreateFile(escaped_port_name, desired_access, 0, 0, |
74510d4b | 407 | OPEN_EXISTING, flags_and_attributes, 0); |
99945a1f ML |
408 | |
409 | free(escaped_port_name); | |
410 | ||
74510d4b ML |
411 | if (port->hdl == INVALID_HANDLE_VALUE) |
412 | return SP_ERR_FAIL; | |
413 | #else | |
414 | int flags_local = 0; | |
f92f1f0c | 415 | |
74510d4b ML |
416 | /* Map 'flags' to the OS-specific settings. */ |
417 | if (flags & SP_MODE_RDWR) | |
418 | flags_local |= O_RDWR; | |
419 | if (flags & SP_MODE_RDONLY) | |
420 | flags_local |= O_RDONLY; | |
421 | if (flags & SP_MODE_NONBLOCK) | |
422 | flags_local |= O_NONBLOCK; | |
423 | ||
424 | if ((port->fd = open(port->name, flags_local)) < 0) | |
425 | return SP_ERR_FAIL; | |
426 | #endif | |
427 | ||
428 | return SP_OK; | |
429 | } | |
430 | ||
74510d4b ML |
431 | int sp_close(struct sp_port *port) |
432 | { | |
433 | CHECK_PORT(); | |
434 | ||
435 | #ifdef _WIN32 | |
436 | /* Returns non-zero upon success, 0 upon failure. */ | |
437 | if (CloseHandle(port->hdl) == 0) | |
438 | return SP_ERR_FAIL; | |
439 | #else | |
440 | /* Returns 0 upon success, -1 upon failure. */ | |
441 | if (close(port->fd) == -1) | |
442 | return SP_ERR_FAIL; | |
443 | #endif | |
444 | ||
445 | return SP_OK; | |
446 | } | |
447 | ||
74510d4b ML |
448 | int sp_flush(struct sp_port *port) |
449 | { | |
450 | CHECK_PORT(); | |
451 | ||
452 | #ifdef _WIN32 | |
453 | /* Returns non-zero upon success, 0 upon failure. */ | |
454 | if (PurgeComm(port->hdl, PURGE_RXCLEAR | PURGE_TXCLEAR) == 0) | |
455 | return SP_ERR_FAIL; | |
456 | #else | |
457 | /* Returns 0 upon success, -1 upon failure. */ | |
458 | if (tcflush(port->fd, TCIOFLUSH) < 0) | |
459 | return SP_ERR_FAIL; | |
460 | #endif | |
461 | return SP_OK; | |
462 | } | |
463 | ||
74510d4b ML |
464 | int sp_write(struct sp_port *port, const void *buf, size_t count) |
465 | { | |
466 | CHECK_PORT(); | |
467 | ||
468 | if (!buf) | |
469 | return SP_ERR_ARG; | |
470 | ||
471 | #ifdef _WIN32 | |
472 | DWORD written = 0; | |
f92f1f0c | 473 | |
74510d4b ML |
474 | /* Returns non-zero upon success, 0 upon failure. */ |
475 | if (WriteFile(port->hdl, buf, count, &written, NULL) == 0) | |
476 | return SP_ERR_FAIL; | |
477 | return written; | |
478 | #else | |
479 | /* Returns the number of bytes written, or -1 upon failure. */ | |
480 | ssize_t written = write(port->fd, buf, count); | |
f92f1f0c | 481 | |
74510d4b ML |
482 | if (written < 0) |
483 | return SP_ERR_FAIL; | |
484 | else | |
f92f1f0c | 485 | return written; |
74510d4b ML |
486 | #endif |
487 | } | |
488 | ||
74510d4b ML |
489 | int sp_read(struct sp_port *port, void *buf, size_t count) |
490 | { | |
491 | CHECK_PORT(); | |
492 | ||
493 | if (!buf) | |
494 | return SP_ERR_ARG; | |
495 | ||
496 | #ifdef _WIN32 | |
497 | DWORD bytes_read = 0; | |
f92f1f0c | 498 | |
74510d4b ML |
499 | /* Returns non-zero upon success, 0 upon failure. */ |
500 | if (ReadFile(port->hdl, buf, count, &bytes_read, NULL) == 0) | |
501 | return SP_ERR_FAIL; | |
502 | return bytes_read; | |
503 | #else | |
504 | ssize_t bytes_read; | |
f92f1f0c | 505 | |
74510d4b ML |
506 | /* Returns the number of bytes read, or -1 upon failure. */ |
507 | if ((bytes_read = read(port->fd, buf, count)) < 0) | |
508 | return SP_ERR_FAIL; | |
509 | return bytes_read; | |
510 | #endif | |
511 | } | |
512 | ||
8094e4a0 | 513 | static int start_config(struct sp_port *port, struct sp_port_data *data) |
74510d4b ML |
514 | { |
515 | CHECK_PORT(); | |
74510d4b | 516 | #ifdef _WIN32 |
8094e4a0 | 517 | if (!GetCommState(port->hdl, &data->dcb)) |
74510d4b | 518 | return SP_ERR_FAIL; |
8094e4a0 | 519 | #else |
9f90173c ML |
520 | int controlbits; |
521 | ||
8094e4a0 ML |
522 | if (tcgetattr(port->fd, &data->term) < 0) |
523 | return SP_ERR_FAIL; | |
9f90173c ML |
524 | |
525 | if (ioctl(port->fd, TIOCMGET, &controlbits) < 0) | |
526 | return SP_ERR_FAIL; | |
527 | ||
528 | if (data->term.c_cflag & CRTSCTS) { | |
529 | data->rts = SP_RTS_FLOW_CONTROL; | |
530 | data->cts = SP_CTS_FLOW_CONTROL; | |
531 | } else { | |
532 | data->rts = (controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF; | |
533 | data->cts = SP_CTS_IGNORE; | |
534 | } | |
535 | ||
536 | data->dtr = (controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF; | |
537 | data->dsr = SP_DSR_IGNORE; | |
8094e4a0 ML |
538 | #endif |
539 | return SP_OK; | |
540 | } | |
74510d4b | 541 | |
8094e4a0 ML |
542 | static int set_baudrate(struct sp_port_data *data, int baudrate) |
543 | { | |
544 | #ifdef _WIN32 | |
74510d4b ML |
545 | switch (baudrate) { |
546 | /* | |
547 | * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to | |
548 | * have documented CBR_* macros. | |
549 | */ | |
550 | case 110: | |
8094e4a0 | 551 | data->dcb.BaudRate = CBR_110; |
74510d4b ML |
552 | break; |
553 | case 300: | |
8094e4a0 | 554 | data->dcb.BaudRate = CBR_300; |
74510d4b ML |
555 | break; |
556 | case 600: | |
8094e4a0 | 557 | data->dcb.BaudRate = CBR_600; |
74510d4b ML |
558 | break; |
559 | case 1200: | |
8094e4a0 | 560 | data->dcb.BaudRate = CBR_1200; |
74510d4b ML |
561 | break; |
562 | case 2400: | |
8094e4a0 | 563 | data->dcb.BaudRate = CBR_2400; |
74510d4b ML |
564 | break; |
565 | case 4800: | |
8094e4a0 | 566 | data->dcb.BaudRate = CBR_4800; |
74510d4b ML |
567 | break; |
568 | case 9600: | |
8094e4a0 | 569 | data->dcb.BaudRate = CBR_9600; |
74510d4b ML |
570 | break; |
571 | case 14400: | |
8094e4a0 | 572 | data->dcb.BaudRate = CBR_14400; /* Not available on Unix? */ |
74510d4b ML |
573 | break; |
574 | case 19200: | |
8094e4a0 | 575 | data->dcb.BaudRate = CBR_19200; |
74510d4b ML |
576 | break; |
577 | case 38400: | |
8094e4a0 | 578 | data->dcb.BaudRate = CBR_38400; |
74510d4b ML |
579 | break; |
580 | case 57600: | |
8094e4a0 | 581 | data->dcb.BaudRate = CBR_57600; |
74510d4b ML |
582 | break; |
583 | case 115200: | |
8094e4a0 | 584 | data->dcb.BaudRate = CBR_115200; |
74510d4b ML |
585 | break; |
586 | case 128000: | |
8094e4a0 | 587 | data->dcb.BaudRate = CBR_128000; /* Not available on Unix? */ |
74510d4b ML |
588 | break; |
589 | case 256000: | |
8094e4a0 | 590 | data->dcb.BaudRate = CBR_256000; /* Not available on Unix? */ |
74510d4b ML |
591 | break; |
592 | default: | |
593 | return SP_ERR_ARG; | |
594 | } | |
74510d4b | 595 | #else |
cbf628c7 | 596 | speed_t baud; |
74510d4b ML |
597 | switch (baudrate) { |
598 | case 50: | |
cbf628c7 | 599 | baud = B50; |
74510d4b ML |
600 | break; |
601 | case 75: | |
cbf628c7 | 602 | baud = B75; |
74510d4b ML |
603 | break; |
604 | case 110: | |
cbf628c7 | 605 | baud = B110; |
74510d4b ML |
606 | break; |
607 | case 134: | |
cbf628c7 | 608 | baud = B134; |
74510d4b ML |
609 | break; |
610 | case 150: | |
cbf628c7 | 611 | baud = B150; |
74510d4b ML |
612 | break; |
613 | case 200: | |
cbf628c7 | 614 | baud = B200; |
74510d4b ML |
615 | break; |
616 | case 300: | |
cbf628c7 | 617 | baud = B300; |
74510d4b ML |
618 | break; |
619 | case 600: | |
cbf628c7 | 620 | baud = B600; |
74510d4b ML |
621 | break; |
622 | case 1200: | |
cbf628c7 | 623 | baud = B1200; |
74510d4b ML |
624 | break; |
625 | case 1800: | |
cbf628c7 | 626 | baud = B1800; |
74510d4b ML |
627 | break; |
628 | case 2400: | |
cbf628c7 | 629 | baud = B2400; |
74510d4b ML |
630 | break; |
631 | case 4800: | |
cbf628c7 | 632 | baud = B4800; |
74510d4b ML |
633 | break; |
634 | case 9600: | |
cbf628c7 | 635 | baud = B9600; |
74510d4b ML |
636 | break; |
637 | case 19200: | |
cbf628c7 | 638 | baud = B19200; |
74510d4b ML |
639 | break; |
640 | case 38400: | |
cbf628c7 | 641 | baud = B38400; |
74510d4b ML |
642 | break; |
643 | case 57600: | |
cbf628c7 | 644 | baud = B57600; |
74510d4b ML |
645 | break; |
646 | case 115200: | |
cbf628c7 | 647 | baud = B115200; |
74510d4b ML |
648 | break; |
649 | case 230400: | |
cbf628c7 | 650 | baud = B230400; |
74510d4b ML |
651 | break; |
652 | #if !defined(__APPLE__) && !defined(__OpenBSD__) | |
653 | case 460800: | |
cbf628c7 | 654 | baud = B460800; |
74510d4b ML |
655 | break; |
656 | #endif | |
657 | default: | |
658 | return SP_ERR_ARG; | |
659 | } | |
cbf628c7 ML |
660 | |
661 | if (cfsetospeed(&data->term, baud) < 0) | |
662 | return SP_ERR_FAIL; | |
663 | ||
664 | if (cfsetispeed(&data->term, baud) < 0) | |
665 | return SP_ERR_FAIL; | |
666 | ||
8094e4a0 ML |
667 | #endif |
668 | return SP_OK; | |
669 | } | |
74510d4b | 670 | |
8094e4a0 ML |
671 | static int set_bits(struct sp_port_data *data, int bits) |
672 | { | |
673 | #ifdef _WIN32 | |
674 | data->dcb.ByteSize = bits; | |
675 | #else | |
676 | data->term.c_cflag &= ~CSIZE; | |
74510d4b ML |
677 | switch (bits) { |
678 | case 8: | |
8094e4a0 | 679 | data->term.c_cflag |= CS8; |
74510d4b ML |
680 | break; |
681 | case 7: | |
8094e4a0 | 682 | data->term.c_cflag |= CS7; |
74510d4b | 683 | break; |
d1d566f2 | 684 | case 6: |
8094e4a0 | 685 | data->term.c_cflag |= CS6; |
d1d566f2 | 686 | break; |
74510d4b ML |
687 | default: |
688 | return SP_ERR_ARG; | |
689 | } | |
8094e4a0 ML |
690 | #endif |
691 | return SP_OK; | |
692 | } | |
74510d4b | 693 | |
8094e4a0 ML |
694 | static int set_parity(struct sp_port_data *data, int parity) |
695 | { | |
696 | #ifdef _WIN32 | |
697 | switch (parity) { | |
698 | /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */ | |
699 | case SP_PARITY_NONE: | |
700 | data->dcb.Parity = NOPARITY; | |
701 | break; | |
702 | case SP_PARITY_EVEN: | |
703 | data->dcb.Parity = EVENPARITY; | |
704 | break; | |
705 | case SP_PARITY_ODD: | |
706 | data->dcb.Parity = ODDPARITY; | |
707 | break; | |
708 | default: | |
709 | return SP_ERR_ARG; | |
710 | } | |
711 | #else | |
712 | data->term.c_iflag &= ~IGNPAR; | |
713 | data->term.c_cflag &= ~(PARENB | PARODD); | |
714 | switch (parity) { | |
715 | case SP_PARITY_NONE: | |
716 | data->term.c_iflag |= IGNPAR; | |
717 | break; | |
718 | case SP_PARITY_EVEN: | |
719 | data->term.c_cflag |= PARENB; | |
720 | break; | |
721 | case SP_PARITY_ODD: | |
722 | data->term.c_cflag |= PARENB | PARODD; | |
723 | break; | |
724 | default: | |
725 | return SP_ERR_ARG; | |
726 | } | |
727 | #endif | |
728 | return SP_OK; | |
729 | } | |
730 | ||
731 | static int set_stopbits(struct sp_port_data *data, int stopbits) | |
732 | { | |
733 | #ifdef _WIN32 | |
74510d4b | 734 | switch (stopbits) { |
8094e4a0 | 735 | /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */ |
74510d4b | 736 | case 1: |
8094e4a0 | 737 | data->dcb.StopBits = ONESTOPBIT; |
74510d4b ML |
738 | break; |
739 | case 2: | |
8094e4a0 | 740 | data->dcb.StopBits = TWOSTOPBITS; |
74510d4b ML |
741 | break; |
742 | default: | |
743 | return SP_ERR_ARG; | |
744 | } | |
8094e4a0 ML |
745 | #else |
746 | data->term.c_cflag &= ~CSTOPB; | |
747 | switch (stopbits) { | |
74510d4b | 748 | case 1: |
8094e4a0 | 749 | data->term.c_cflag &= ~CSTOPB; |
74510d4b ML |
750 | break; |
751 | case 2: | |
8094e4a0 | 752 | data->term.c_cflag |= CSTOPB; |
74510d4b ML |
753 | break; |
754 | default: | |
755 | return SP_ERR_ARG; | |
756 | } | |
8094e4a0 ML |
757 | #endif |
758 | return SP_OK; | |
759 | } | |
74510d4b | 760 | |
d514a26f | 761 | static int set_rts(struct sp_port_data *data, int rts) |
8094e4a0 | 762 | { |
d514a26f ML |
763 | #ifdef _WIN32 |
764 | switch (rts) { | |
765 | case SP_RTS_OFF: | |
766 | data->dcb.fRtsControl = RTS_CONTROL_DISABLE; | |
74510d4b | 767 | break; |
d514a26f ML |
768 | case SP_RTS_ON: |
769 | data->dcb.fRtsControl = RTS_CONTROL_ENABLE; | |
74510d4b | 770 | break; |
d514a26f ML |
771 | case SP_RTS_FLOW_CONTROL: |
772 | data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE; | |
74510d4b ML |
773 | break; |
774 | default: | |
775 | return SP_ERR_ARG; | |
776 | } | |
d514a26f ML |
777 | #else |
778 | data->rts = rts; | |
8094e4a0 ML |
779 | #endif |
780 | return SP_OK; | |
781 | } | |
782 | ||
d514a26f | 783 | static int set_cts(struct sp_port_data *data, int cts) |
8094e4a0 ML |
784 | { |
785 | #ifdef _WIN32 | |
d514a26f ML |
786 | switch (cts) { |
787 | case SP_CTS_IGNORE: | |
788 | data->dcb.fOutxCtsFlow = FALSE; | |
789 | break; | |
790 | case SP_CTS_FLOW_CONTROL: | |
791 | data->dcb.fOutxCtsFlow = TRUE; | |
792 | break; | |
793 | default: | |
794 | return SP_ERR_ARG; | |
795 | } | |
8094e4a0 | 796 | #else |
d514a26f | 797 | data->cts = cts; |
8094e4a0 ML |
798 | #endif |
799 | return SP_OK; | |
800 | } | |
801 | ||
802 | static int set_dtr(struct sp_port_data *data, int dtr) | |
803 | { | |
804 | #ifdef _WIN32 | |
d514a26f ML |
805 | switch (dtr) { |
806 | case SP_DTR_OFF: | |
a46f0960 | 807 | data->dcb.fDtrControl = DTR_CONTROL_DISABLE; |
d514a26f ML |
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 | } | |
8094e4a0 ML |
818 | #else |
819 | data->dtr = dtr; | |
820 | #endif | |
821 | return SP_OK; | |
822 | } | |
823 | ||
d514a26f ML |
824 | static int set_dsr(struct sp_port_data *data, int dsr) |
825 | { | |
826 | #ifdef _WIN32 | |
827 | switch (dsr) { | |
828 | case SP_DSR_IGNORE: | |
829 | data->dcb.fOutxDsrFlow = FALSE; | |
830 | break; | |
831 | case SP_DSR_FLOW_CONTROL: | |
832 | data->dcb.fOutxDsrFlow = TRUE; | |
833 | break; | |
834 | default: | |
835 | return SP_ERR_ARG; | |
836 | } | |
837 | #else | |
838 | data->dsr = dsr; | |
839 | #endif | |
840 | return SP_OK; | |
841 | } | |
842 | ||
843 | static int set_xon_xoff(struct sp_port_data *data, int xon_xoff) | |
844 | { | |
845 | #ifdef _WIN32 | |
846 | switch (xon_xoff) { | |
847 | case SP_XONXOFF_DISABLED: | |
848 | data->dcb.fInX = FALSE; | |
849 | data->dcb.fOutX = FALSE; | |
850 | break; | |
851 | case SP_XONXOFF_IN: | |
852 | data->dcb.fInX = TRUE; | |
853 | data->dcb.fOutX = FALSE; | |
854 | break; | |
855 | case SP_XONXOFF_OUT: | |
856 | data->dcb.fInX = FALSE; | |
857 | data->dcb.fOutX = TRUE; | |
858 | break; | |
859 | case SP_XONXOFF_INOUT: | |
860 | data->dcb.fInX = TRUE; | |
861 | data->dcb.fOutX = TRUE; | |
862 | break; | |
863 | default: | |
864 | return SP_ERR_ARG; | |
865 | } | |
866 | #else | |
867 | data->term.c_iflag &= ~(IXON | IXOFF | IXANY); | |
868 | switch (xon_xoff) { | |
869 | case SP_XONXOFF_DISABLED: | |
870 | break; | |
871 | case SP_XONXOFF_IN: | |
872 | data->term.c_iflag |= IXOFF; | |
873 | break; | |
874 | case SP_XONXOFF_OUT: | |
875 | data->term.c_iflag |= IXON | IXANY; | |
876 | break; | |
877 | case SP_XONXOFF_INOUT: | |
878 | data->term.c_iflag |= IXON | IXOFF | IXANY; | |
879 | break; | |
880 | default: | |
881 | return SP_ERR_ARG; | |
882 | } | |
883 | #endif | |
884 | return SP_OK; | |
885 | } | |
886 | ||
8094e4a0 ML |
887 | static int apply_config(struct sp_port *port, struct sp_port_data *data) |
888 | { | |
889 | #ifdef _WIN32 | |
890 | if (!SetCommState(port->hdl, &data->dcb)) | |
891 | return SP_ERR_FAIL; | |
892 | #else | |
893 | int controlbits; | |
74510d4b ML |
894 | |
895 | /* Turn off all serial port cooking. */ | |
8094e4a0 ML |
896 | data->term.c_iflag &= ~(ISTRIP | INLCR | ICRNL); |
897 | data->term.c_oflag &= ~(ONLCR | OCRNL | ONOCR); | |
74510d4b | 898 | #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) |
8094e4a0 | 899 | data->term.c_oflag &= ~OFILL; |
74510d4b | 900 | #endif |
74510d4b | 901 | /* Disable canonical mode, and don't echo input characters. */ |
8094e4a0 | 902 | data->term.c_lflag &= ~(ICANON | ECHO); |
74510d4b | 903 | |
8683177b | 904 | /* Ignore modem status lines; enable receiver */ |
8094e4a0 | 905 | data->term.c_cflag |= (CLOCAL | CREAD); |
8683177b | 906 | |
d514a26f ML |
907 | /* Asymmetric use of RTS/CTS not supported yet. */ |
908 | if ((data->rts == SP_RTS_FLOW_CONTROL) != (data->cts == SP_CTS_FLOW_CONTROL)) | |
909 | return SP_ERR_ARG; | |
910 | ||
911 | /* DTR/DSR flow control not supported yet. */ | |
912 | if (data->dtr == SP_DTR_FLOW_CONTROL || data->dsr == SP_DSR_FLOW_CONTROL) | |
913 | return SP_ERR_ARG; | |
74510d4b | 914 | |
d514a26f ML |
915 | if (data->rts == SP_RTS_FLOW_CONTROL) |
916 | data->term.c_iflag |= CRTSCTS; | |
917 | else | |
918 | { | |
74510d4b | 919 | controlbits = TIOCM_RTS; |
d514a26f | 920 | if (ioctl(port->fd, data->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC, |
74510d4b ML |
921 | &controlbits) < 0) |
922 | return SP_ERR_FAIL; | |
923 | } | |
924 | ||
d514a26f ML |
925 | controlbits = TIOCM_DTR; |
926 | if (ioctl(port->fd, data->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC, | |
927 | &controlbits) < 0) | |
928 | return SP_ERR_FAIL; | |
929 | ||
930 | /* Write the configured settings. */ | |
931 | if (tcsetattr(port->fd, TCSADRAIN, &data->term) < 0) | |
932 | return SP_ERR_FAIL; | |
74510d4b | 933 | #endif |
8094e4a0 ML |
934 | return SP_OK; |
935 | } | |
936 | ||
937 | #define TRY(x) do { int ret = x; if (ret != SP_OK) return ret; } while (0) | |
a46f0960 | 938 | #define TRY_SET(x) do { if (config->x >= 0) TRY(set_##x(&data, config->x)); } while (0) |
8094e4a0 | 939 | |
d1202734 | 940 | int sp_set_config(struct sp_port *port, struct sp_port_config *config) |
8094e4a0 ML |
941 | { |
942 | struct sp_port_data data; | |
943 | ||
944 | TRY(start_config(port, &data)); | |
a46f0960 ML |
945 | TRY_SET(baudrate); |
946 | TRY_SET(bits); | |
947 | TRY_SET(parity); | |
948 | TRY_SET(stopbits); | |
a46f0960 | 949 | TRY_SET(rts); |
d514a26f | 950 | TRY_SET(cts); |
a46f0960 | 951 | TRY_SET(dtr); |
d514a26f ML |
952 | TRY_SET(dsr); |
953 | TRY_SET(xon_xoff); | |
8094e4a0 | 954 | TRY(apply_config(port, &data)); |
74510d4b ML |
955 | |
956 | return SP_OK; | |
957 | } | |
958 | ||
74510d4b ML |
959 | int sp_last_error_code(void) |
960 | { | |
961 | #ifdef _WIN32 | |
962 | return GetLastError(); | |
963 | #else | |
964 | return errno; | |
965 | #endif | |
966 | } | |
967 | ||
74510d4b ML |
968 | char *sp_last_error_message(void) |
969 | { | |
970 | #ifdef _WIN32 | |
971 | LPVOID message; | |
972 | DWORD error = GetLastError(); | |
973 | ||
974 | FormatMessage( | |
975 | FORMAT_MESSAGE_ALLOCATE_BUFFER | | |
976 | FORMAT_MESSAGE_FROM_SYSTEM | | |
977 | FORMAT_MESSAGE_IGNORE_INSERTS, | |
978 | NULL, | |
979 | error, | |
980 | MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), | |
981 | (LPTSTR) &message, | |
982 | 0, NULL ); | |
983 | ||
984 | return message; | |
985 | #else | |
986 | return strerror(errno); | |
987 | #endif | |
988 | } | |
989 | ||
74510d4b ML |
990 | void sp_free_error_message(char *message) |
991 | { | |
992 | #ifdef _WIN32 | |
993 | LocalFree(message); | |
64eec30d ML |
994 | #else |
995 | (void)message; | |
74510d4b ML |
996 | #endif |
997 | } |