]> sigrok.org Git - libserialport.git/blame_incremental - serialport.c
projects / libserialport.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
Make libudev optional.
[libserialport.git] / serialport.c
... / ...
CommitLineData
1/*
2 * This file is part of the libserialport project.
3 *
4 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
5 * Copyright (C) 2010-2012 Uwe Hermann <uwe@hermann-uwe.de>
6 * Copyright (C) 2013 Martin Ling <martin-libserialport@earth.li>
7 * Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz>
8 *
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation, either version 3 of the
12 * License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23#include <string.h>
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <fcntl.h>
27#include <unistd.h>
28#include <stdlib.h>
29#include <errno.h>
30#include <stdio.h>
31#include <stdarg.h>
32#ifdef _WIN32
33#include <windows.h>
34#include <tchar.h>
35#include <stdio.h>
36#else
37#include <limits.h>
38#include <termios.h>
39#include <sys/ioctl.h>
40#include <sys/time.h>
41#include <limits.h>
42#endif
43#ifdef __APPLE__
44#include <IOKit/IOKitLib.h>
45#include <IOKit/serial/IOSerialKeys.h>
46#include <IOKit/serial/ioss.h>
47#include <sys/syslimits.h>
48#endif
49#ifdef __linux__
50#ifdef HAVE_LIBUDEV
51#include "libudev.h"
52#endif
53#include "linux/serial.h"
54#include "linux_termios.h"
55
56/* TCGETX/TCSETX is not available everywhere. */
57#if defined(TCGETX) && defined(TCSETX) && defined(HAVE_TERMIOX)
58#define USE_TERMIOX
59#endif
60#endif
61
62/* TIOCINQ/TIOCOUTQ is not available everywhere. */
63#if !defined(TIOCINQ) && defined(FIONREAD)
64#define TIOCINQ FIONREAD
65#endif
66#if !defined(TIOCOUTQ) && defined(FIONWRITE)
67#define TIOCOUTQ FIONWRITE
68#endif
69
70#ifndef _WIN32
71#include "linux_termios.h"
72#endif
73
74#include "libserialport.h"
75
76struct sp_port {
77 char *name;
78#ifdef _WIN32
79 HANDLE hdl;
80 COMMTIMEOUTS timeouts;
81 OVERLAPPED write_ovl;
82 OVERLAPPED read_ovl;
83 BYTE pending_byte;
84 BOOL writing;
85#else
86 int fd;
87#endif
88};
89
90struct sp_port_config {
91 int baudrate;
92 int bits;
93 enum sp_parity parity;
94 int stopbits;
95 enum sp_rts rts;
96 enum sp_cts cts;
97 enum sp_dtr dtr;
98 enum sp_dsr dsr;
99 enum sp_xonxoff xon_xoff;
100};
101
102struct port_data {
103#ifdef _WIN32
104 DCB dcb;
105#else
106 struct termios term;
107 int controlbits;
108 int termiox_supported;
109 int flow;
110#endif
111};
112
113/* Standard baud rates. */
114#ifdef _WIN32
115#define BAUD_TYPE DWORD
116#define BAUD(n) {CBR_##n, n}
117#else
118#define BAUD_TYPE speed_t
119#define BAUD(n) {B##n, n}
120#endif
121
122struct std_baudrate {
123 BAUD_TYPE index;
124 int value;
125};
126
127const struct std_baudrate std_baudrates[] = {
128#ifdef _WIN32
129 /*
130 * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
131 * have documented CBR_* macros.
132 */
133 BAUD(110), BAUD(300), BAUD(600), BAUD(1200), BAUD(2400), BAUD(4800),
134 BAUD(9600), BAUD(14400), BAUD(19200), BAUD(38400), BAUD(57600),
135 BAUD(115200), BAUD(128000), BAUD(256000),
136#else
137 BAUD(50), BAUD(75), BAUD(110), BAUD(134), BAUD(150), BAUD(200),
138 BAUD(300), BAUD(600), BAUD(1200), BAUD(1800), BAUD(2400), BAUD(4800),
139 BAUD(9600), BAUD(19200), BAUD(38400), BAUD(57600), BAUD(115200),
140 BAUD(230400),
141#if !defined(__APPLE__) && !defined(__OpenBSD__)
142 BAUD(460800),
143#endif
144#endif
145};
146
147void (*sp_debug_handler)(const char *format, ...) = sp_default_debug_handler;
148
149#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
150#define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)
151
152/* Debug output macros. */
153#define DEBUG(fmt, ...) do { if (sp_debug_handler) sp_debug_handler(fmt ".\n", ##__VA_ARGS__); } while (0)
154#define DEBUG_ERROR(err, msg) DEBUG("%s returning " #err ": " msg, __func__)
155#define DEBUG_FAIL(msg) do { \
156 char *errmsg = sp_last_error_message(); \
157 DEBUG("%s returning SP_ERR_FAIL: " msg ": %s", __func__, errmsg); \
158 sp_free_error_message(errmsg); \
159} while (0);
160#define RETURN() do { DEBUG("%s returning", __func__); return; } while(0)
161#define RETURN_CODE(x) do { DEBUG("%s returning " #x, __func__); return x; } while (0)
162#define RETURN_CODEVAL(x) do { \
163 switch (x) { \
164 case SP_OK: RETURN_CODE(SP_OK); \
165 case SP_ERR_ARG: RETURN_CODE(SP_ERR_ARG); \
166 case SP_ERR_FAIL: RETURN_CODE(SP_ERR_FAIL); \
167 case SP_ERR_MEM: RETURN_CODE(SP_ERR_MEM); \
168 case SP_ERR_SUPP: RETURN_CODE(SP_ERR_SUPP); \
169 } \
170} while (0)
171#define RETURN_OK() RETURN_CODE(SP_OK);
172#define RETURN_ERROR(err, msg) do { DEBUG_ERROR(err, msg); return err; } while (0)
173#define RETURN_FAIL(msg) do { DEBUG_FAIL(msg); return SP_ERR_FAIL; } while (0)
174#define RETURN_VALUE(fmt, x) do { DEBUG("%s returning " fmt, __func__, x); return x; } while (0)
175#define SET_ERROR(val, err, msg) do { DEBUG_ERROR(err, msg); val = err; } while (0)
176#define SET_FAIL(val, msg) do { DEBUG_FAIL(msg); val = SP_ERR_FAIL; } while (0)
177#define TRACE(fmt, ...) DEBUG("%s(" fmt ") called", __func__, ##__VA_ARGS__)
178
179#define TRY(x) do { int ret = x; if (ret != SP_OK) RETURN_CODEVAL(ret); } while (0)
180
181/* Helper functions. */
182static struct sp_port **list_append(struct sp_port **list, const char *portname);
183static enum sp_return get_config(struct sp_port *port, struct port_data *data,
184 struct sp_port_config *config);
185static enum sp_return set_config(struct sp_port *port, struct port_data *data,
186 const struct sp_port_config *config);
187
188enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
189{
190 struct sp_port *port;
191 int len;
192
193 TRACE("%s, %p", portname, port_ptr);
194
195 if (!port_ptr)
196 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
197
198 *port_ptr = NULL;
199
200 if (!portname)
201 RETURN_ERROR(SP_ERR_ARG, "Null port name");
202
203 DEBUG("Building structure for port %s", portname);
204
205 if (!(port = malloc(sizeof(struct sp_port))))
206 RETURN_ERROR(SP_ERR_MEM, "Port structure malloc failed");
207
208 len = strlen(portname) + 1;
209
210 if (!(port->name = malloc(len))) {
211 free(port);
212 RETURN_ERROR(SP_ERR_MEM, "Port name malloc failed");
213 }
214
215 memcpy(port->name, portname, len);
216
217#ifdef _WIN32
218 port->hdl = INVALID_HANDLE_VALUE;
219#else
220 port->fd = -1;
221#endif
222
223 *port_ptr = port;
224
225 RETURN_OK();
226}
227
228char *sp_get_port_name(const struct sp_port *port)
229{
230 TRACE("%p", port);
231
232 if (!port)
233 return NULL;
234
235 RETURN_VALUE("%s", port->name);
236}
237
238enum sp_return sp_get_port_handle(const struct sp_port *port, void *result_ptr)
239{
240 TRACE("%p, %p", port, result_ptr);
241
242 if (!port)
243 RETURN_ERROR(SP_ERR_ARG, "Null port");
244
245#ifdef _WIN32
246 HANDLE *handle_ptr = result_ptr;
247 *handle_ptr = port->hdl;
248#else
249 int *fd_ptr = result_ptr;
250 *fd_ptr = port->fd;
251#endif
252
253 RETURN_OK();
254}
255
256enum sp_return sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr)
257{
258 TRACE("%p, %p", port, copy_ptr);
259
260 if (!copy_ptr)
261 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
262
263 *copy_ptr = NULL;
264
265 if (!port)
266 RETURN_ERROR(SP_ERR_ARG, "Null port");
267
268 if (!port->name)
269 RETURN_ERROR(SP_ERR_ARG, "Null port name");
270
271 DEBUG("Copying port structure");
272
273 RETURN_VALUE("%p", sp_get_port_by_name(port->name, copy_ptr));
274}
275
276void sp_free_port(struct sp_port *port)
277{
278 TRACE("%p", port);
279
280 if (!port) {
281 DEBUG("Null port");
282 RETURN();
283 }
284
285 DEBUG("Freeing port structure");
286
287 if (port->name)
288 free(port->name);
289
290 free(port);
291
292 RETURN();
293}
294
295static struct sp_port **list_append(struct sp_port **list, const char *portname)
296{
297 void *tmp;
298 unsigned int count;
299
300 for (count = 0; list[count]; count++);
301 if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
302 goto fail;
303 list = tmp;
304 if (sp_get_port_by_name(portname, &list[count]) != SP_OK)
305 goto fail;
306 list[count + 1] = NULL;
307 return list;
308
309fail:
310 sp_free_port_list(list);
311 return NULL;
312}
313
314enum sp_return sp_list_ports(struct sp_port ***list_ptr)
315{
316 struct sp_port **list;
317 int ret = SP_ERR_SUPP;
318
319 TRACE("%p", list_ptr);
320
321 if (!list_ptr)
322 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
323
324 DEBUG("Enumerating ports");
325
326 if (!(list = malloc(sizeof(struct sp_port **))))
327 RETURN_ERROR(SP_ERR_MEM, "Port list malloc failed");
328
329 list[0] = NULL;
330
331#ifdef _WIN32
332 HKEY key;
333 TCHAR *value, *data;
334 DWORD max_value_len, max_data_size, max_data_len;
335 DWORD value_len, data_size, data_len;
336 DWORD type, index = 0;
337 char *name;
338 int name_len;
339
340 ret = SP_OK;
341
342 DEBUG("Opening registry key");
343 if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
344 0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS) {
345 SET_FAIL(ret, "RegOpenKeyEx() failed");
346 goto out_done;
347 }
348 DEBUG("Querying registry key value and data sizes");
349 if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
350 &max_value_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS) {
351 SET_FAIL(ret, "RegQueryInfoKey() failed");
352 goto out_close;
353 }
354 max_data_len = max_data_size / sizeof(TCHAR);
355 if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) {
356 SET_ERROR(ret, SP_ERR_MEM, "registry value malloc failed");
357 goto out_close;
358 }
359 if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) {
360 SET_ERROR(ret, SP_ERR_MEM, "registry data malloc failed");
361 goto out_free_value;
362 }
363 DEBUG("Iterating over values");
364 while (
365 value_len = max_value_len + 1,
366 data_size = max_data_size,
367 RegEnumValue(key, index, value, &value_len,
368 NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS)
369 {
370 data_len = data_size / sizeof(TCHAR);
371 data[data_len] = '\0';
372#ifdef UNICODE
373 name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL)
374#else
375 name_len = data_len + 1;
376#endif
377 if (!(name = malloc(name_len))) {
378 SET_ERROR(ret, SP_ERR_MEM, "registry port name malloc failed");
379 goto out;
380 }
381#ifdef UNICODE
382 WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL);
383#else
384 strcpy(name, data);
385#endif
386 if (type == REG_SZ) {
387 DEBUG("Found port %s", name);
388 if (!(list = list_append(list, name))) {
389 SET_ERROR(ret, SP_ERR_MEM, "list append failed");
390 goto out;
391 }
392 }
393 index++;
394 }
395out:
396 free(data);
397out_free_value:
398 free(value);
399out_close:
400 RegCloseKey(key);
401out_done:
402#endif
403#ifdef __APPLE__
404 mach_port_t master;
405 CFMutableDictionaryRef classes;
406 io_iterator_t iter;
407 char *path;
408 io_object_t port;
409 CFTypeRef cf_path;
410 Boolean result;
411
412 ret = SP_OK;
413
414 DEBUG("Getting IOKit master port");
415 if (IOMasterPort(MACH_PORT_NULL, &master) != KERN_SUCCESS) {
416 SET_FAIL(ret, "IOMasterPort() failed");
417 goto out_done;
418 }
419
420 DEBUG("Creating matching dictionary");
421 if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue))) {
422 SET_FAIL(ret, "IOServiceMatching() failed");
423 goto out_done;
424 }
425
426 CFDictionarySetValue(classes,
427 CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDAllTypes));
428
429 DEBUG("Getting matching services");
430 if (IOServiceGetMatchingServices(master, classes, &iter) != KERN_SUCCESS) {
431 SET_FAIL(ret, "IOServiceGetMatchingServices() failed");
432 goto out_done;
433 }
434
435 if (!(path = malloc(PATH_MAX))) {
436 SET_ERROR(ret, SP_ERR_MEM, "device path malloc failed");
437 goto out_release;
438 }
439
440 DEBUG("Iterating over results");
441 while ((port = IOIteratorNext(iter))) {
442 cf_path = IORegistryEntryCreateCFProperty(port,
443 CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0);
444 if (cf_path) {
445 result = CFStringGetCString(cf_path,
446 path, PATH_MAX, kCFStringEncodingASCII);
447 CFRelease(cf_path);
448 if (result) {
449 DEBUG("Found port %s", path);
450 if (!(list = list_append(list, path))) {
451 SET_ERROR(ret, SP_ERR_MEM, "list append failed");
452 IOObjectRelease(port);
453 goto out;
454 }
455 }
456 }
457 IOObjectRelease(port);
458 }
459out:
460 free(path);
461out_release:
462 IOObjectRelease(iter);
463out_done:
464#endif
465#if defined(__linux__) && defined(HAVE_LIBUDEV)
466 struct udev *ud;
467 struct udev_enumerate *ud_enumerate;
468 struct udev_list_entry *ud_list;
469 struct udev_list_entry *ud_entry;
470 const char *path;
471 struct udev_device *ud_dev, *ud_parent;
472 const char *name;
473 const char *driver;
474 int fd, ioctl_result;
475 struct serial_struct serial_info;
476
477 ret = SP_OK;
478
479 DEBUG("Enumerating tty devices");
480 ud = udev_new();
481 ud_enumerate = udev_enumerate_new(ud);
482 udev_enumerate_add_match_subsystem(ud_enumerate, "tty");
483 udev_enumerate_scan_devices(ud_enumerate);
484 ud_list = udev_enumerate_get_list_entry(ud_enumerate);
485 DEBUG("Iterating over results");
486 udev_list_entry_foreach(ud_entry, ud_list) {
487 path = udev_list_entry_get_name(ud_entry);
488 DEBUG("Found device %s", path);
489 ud_dev = udev_device_new_from_syspath(ud, path);
490 /* If there is no parent device, this is a virtual tty. */
491 ud_parent = udev_device_get_parent(ud_dev);
492 if (ud_parent == NULL) {
493 DEBUG("No parent device, assuming virtual tty");
494 udev_device_unref(ud_dev);
495 continue;
496 }
497 name = udev_device_get_devnode(ud_dev);
498 /* The serial8250 driver has a hardcoded number of ports.
499 * The only way to tell which actually exist on a given system
500 * is to try to open them and make an ioctl call. */
501 driver = udev_device_get_driver(ud_parent);
502 if (driver && !strcmp(driver, "serial8250")) {
503 DEBUG("serial8250 device, attempting to open");
504 if ((fd = open(name, O_RDWR | O_NONBLOCK | O_NOCTTY)) < 0) {
505 DEBUG("open failed, skipping");
506 goto skip;
507 }
508 ioctl_result = ioctl(fd, TIOCGSERIAL, &serial_info);
509 close(fd);
510 if (ioctl_result != 0) {
511 DEBUG("ioctl failed, skipping");
512 goto skip;
513 }
514 if (serial_info.type == PORT_UNKNOWN) {
515 DEBUG("port type is unknown, skipping");
516 goto skip;
517 }
518 }
519 DEBUG("Found port %s", name);
520 list = list_append(list, name);
521skip:
522 udev_device_unref(ud_dev);
523 if (!list) {
524 SET_ERROR(ret, SP_ERR_MEM, "list append failed");
525 goto out;
526 }
527 }
528out:
529 udev_enumerate_unref(ud_enumerate);
530 udev_unref(ud);
531#endif
532
533 switch (ret) {
534 case SP_OK:
535 *list_ptr = list;
536 RETURN_OK();
537 case SP_ERR_SUPP:
538 DEBUG_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform.");
539 default:
540 if (list)
541 sp_free_port_list(list);
542 *list_ptr = NULL;
543 return ret;
544 }
545}
546
547void sp_free_port_list(struct sp_port **list)
548{
549 unsigned int i;
550
551 TRACE("%p", list);
552
553 if (!list) {
554 DEBUG("Null list");
555 RETURN();
556 }
557
558 DEBUG("Freeing port list");
559
560 for (i = 0; list[i]; i++)
561 sp_free_port(list[i]);
562 free(list);
563
564 RETURN();
565}
566
567#define CHECK_PORT() do { \
568 if (port == NULL) \
569 RETURN_ERROR(SP_ERR_ARG, "Null port"); \
570 if (port->name == NULL) \
571 RETURN_ERROR(SP_ERR_ARG, "Null port name"); \
572} while (0)
573#ifdef _WIN32
574#define CHECK_PORT_HANDLE() do { \
575 if (port->hdl == INVALID_HANDLE_VALUE) \
576 RETURN_ERROR(SP_ERR_ARG, "Invalid port handle"); \
577} while (0)
578#else
579#define CHECK_PORT_HANDLE() do { \
580 if (port->fd < 0) \
581 RETURN_ERROR(SP_ERR_ARG, "Invalid port fd"); \
582} while (0)
583#endif
584#define CHECK_OPEN_PORT() do { \
585 CHECK_PORT(); \
586 CHECK_PORT_HANDLE(); \
587} while (0)
588
589enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
590{
591 struct port_data data;
592 struct sp_port_config config;
593 enum sp_return ret;
594
595 TRACE("%p, 0x%x", port, flags);
596
597 CHECK_PORT();
598
599 if (flags > (SP_MODE_READ | SP_MODE_WRITE))
600 RETURN_ERROR(SP_ERR_ARG, "Invalid flags");
601
602 DEBUG("Opening port %s", port->name);
603
604#ifdef _WIN32
605 DWORD desired_access = 0, flags_and_attributes = 0;
606 char *escaped_port_name;
607
608 /* Prefix port name with '\\.\' to work with ports above COM9. */
609 if (!(escaped_port_name = malloc(strlen(port->name + 5))))
610 RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
611 sprintf(escaped_port_name, "\\\\.\\%s", port->name);
612
613 /* Map 'flags' to the OS-specific settings. */
614 flags_and_attributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED;
615 if (flags & SP_MODE_READ)
616 desired_access |= GENERIC_READ;
617 if (flags & SP_MODE_WRITE)
618 desired_access |= GENERIC_WRITE;
619
620 port->hdl = CreateFile(escaped_port_name, desired_access, 0, 0,
621 OPEN_EXISTING, flags_and_attributes, 0);
622
623 free(escaped_port_name);
624
625 if (port->hdl == INVALID_HANDLE_VALUE)
626 RETURN_FAIL("port CreateFile() failed");
627
628 /* All timeouts initially disabled. */
629 port->timeouts.ReadIntervalTimeout = 0;
630 port->timeouts.ReadTotalTimeoutMultiplier = 0;
631 port->timeouts.ReadTotalTimeoutConstant = 0;
632 port->timeouts.WriteTotalTimeoutMultiplier = 0;
633 port->timeouts.WriteTotalTimeoutConstant = 0;
634
635 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) {
636 sp_close(port);
637 RETURN_FAIL("SetCommTimeouts() failed");
638 }
639
640 /* Prepare OVERLAPPED structures. */
641 memset(&port->read_ovl, 0, sizeof(port->read_ovl));
642 memset(&port->write_ovl, 0, sizeof(port->write_ovl));
643 port->read_ovl.hEvent = INVALID_HANDLE_VALUE;
644 port->write_ovl.hEvent = INVALID_HANDLE_VALUE;
645 if ((port->read_ovl.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL)) == INVALID_HANDLE_VALUE) {
646 sp_close(port);
647 RETURN_FAIL("read event CreateEvent() failed");
648 }
649 if ((port->write_ovl.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL)) == INVALID_HANDLE_VALUE) {
650 sp_close(port);
651 RETURN_FAIL("write event CreateEvent() failed");
652 }
653
654 port->writing = FALSE;
655
656#else
657 int flags_local = O_NONBLOCK | O_NOCTTY;
658
659 /* Map 'flags' to the OS-specific settings. */
660 if (flags & (SP_MODE_READ | SP_MODE_WRITE))
661 flags_local |= O_RDWR;
662 else if (flags & SP_MODE_READ)
663 flags_local |= O_RDONLY;
664 else if (flags & SP_MODE_WRITE)
665 flags_local |= O_WRONLY;
666
667 if ((port->fd = open(port->name, flags_local)) < 0)
668 RETURN_FAIL("open() failed");
669#endif
670
671 ret = get_config(port, &data, &config);
672
673 if (ret < 0) {
674 sp_close(port);
675 RETURN_CODEVAL(ret);
676 }
677
678 /* Set sane port settings. */
679#ifdef _WIN32
680 data.dcb.fBinary = TRUE;
681 data.dcb.fDsrSensitivity = FALSE;
682 data.dcb.fErrorChar = FALSE;
683 data.dcb.fNull = FALSE;
684 data.dcb.fAbortOnError = TRUE;
685#else
686 /* Turn off all fancy termios tricks, give us a raw channel. */
687 data.term.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IMAXBEL);
688#ifdef IUCLC
689 data.term.c_iflag &= ~IUCLC;
690#endif
691 data.term.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET);
692#ifdef OLCUC
693 data.term.c_oflag &= ~OLCUC;
694#endif
695#ifdef NLDLY
696 data.term.c_oflag &= ~NLDLY;
697#endif
698#ifdef CRDLY
699 data.term.c_oflag &= ~CRDLY;
700#endif
701#ifdef TABDLY
702 data.term.c_oflag &= ~TABDLY;
703#endif
704#ifdef BSDLY
705 data.term.c_oflag &= ~BSDLY;
706#endif
707#ifdef VTDLY
708 data.term.c_oflag &= ~VTDLY;
709#endif
710#ifdef FFDLY
711 data.term.c_oflag &= ~FFDLY;
712#endif
713#ifdef OFILL
714 data.term.c_oflag &= ~OFILL;
715#endif
716 data.term.c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN);
717 data.term.c_cc[VMIN] = 0;
718 data.term.c_cc[VTIME] = 0;
719
720 /* Ignore modem status lines; enable receiver; leave control lines alone on close. */
721 data.term.c_cflag |= (CLOCAL | CREAD | HUPCL);
722#endif
723
724 ret = set_config(port, &data, &config);
725
726 if (ret < 0) {
727 sp_close(port);
728 RETURN_CODEVAL(ret);
729 }
730
731 RETURN_OK();
732}
733
734enum sp_return sp_close(struct sp_port *port)
735{
736 TRACE("%p", port);
737
738 CHECK_OPEN_PORT();
739
740 DEBUG("Closing port %s", port->name);
741
742#ifdef _WIN32
743 /* Returns non-zero upon success, 0 upon failure. */
744 if (CloseHandle(port->hdl) == 0)
745 RETURN_FAIL("port CloseHandle() failed");
746 port->hdl = INVALID_HANDLE_VALUE;
747 /* Close event handle created for overlapped reads. */
748 if (port->read_ovl.hEvent != INVALID_HANDLE_VALUE && CloseHandle(port->read_ovl.hEvent) == 0)
749 RETURN_FAIL("read event CloseHandle() failed");
750 /* Close event handle created for overlapped writes. */
751 if (port->write_ovl.hEvent != INVALID_HANDLE_VALUE && CloseHandle(port->write_ovl.hEvent) == 0)
752 RETURN_FAIL("write event CloseHandle() failed");
753#else
754 /* Returns 0 upon success, -1 upon failure. */
755 if (close(port->fd) == -1)
756 RETURN_FAIL("close() failed");
757 port->fd = -1;
758#endif
759
760 RETURN_OK();
761}
762
763enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers)
764{
765 TRACE("%p, 0x%x", port, buffers);
766
767 CHECK_OPEN_PORT();
768
769 if (buffers > SP_BUF_BOTH)
770 RETURN_ERROR(SP_ERR_ARG, "Invalid buffer selection");
771
772 const char *buffer_names[] = {"no", "input", "output", "both"};
773
774 DEBUG("Flushing %s buffers on port %s", buffer_names[buffers], port->name);
775
776#ifdef _WIN32
777 DWORD flags = 0;
778 if (buffers & SP_BUF_INPUT)
779 flags |= PURGE_RXCLEAR;
780 if (buffers & SP_BUF_OUTPUT)
781 flags |= PURGE_TXCLEAR;
782
783 /* Returns non-zero upon success, 0 upon failure. */
784 if (PurgeComm(port->hdl, flags) == 0)
785 RETURN_FAIL("PurgeComm() failed");
786#else
787 int flags = 0;
788 if (buffers & SP_BUF_BOTH)
789 flags = TCIOFLUSH;
790 else if (buffers & SP_BUF_INPUT)
791 flags = TCIFLUSH;
792 else if (buffers & SP_BUF_OUTPUT)
793 flags = TCOFLUSH;
794
795 /* Returns 0 upon success, -1 upon failure. */
796 if (tcflush(port->fd, flags) < 0)
797 RETURN_FAIL("tcflush() failed");
798#endif
799 RETURN_OK();
800}
801
802enum sp_return sp_drain(struct sp_port *port)
803{
804 TRACE("%p", port);
805
806 CHECK_OPEN_PORT();
807
808 DEBUG("Draining port %s", port->name);
809
810#ifdef _WIN32
811 /* Returns non-zero upon success, 0 upon failure. */
812 if (FlushFileBuffers(port->hdl) == 0)
813 RETURN_FAIL("FlushFileBuffers() failed");
814 RETURN_OK();
815#else
816 int result;
817 while (1) {
818 result = tcdrain(port->fd);
819 if (result < 0) {
820 if (errno == EINTR) {
821 DEBUG("tcdrain() was interrupted");
822 continue;
823 } else {
824 RETURN_FAIL("tcdrain() failed");
825 }
826 } else {
827 RETURN_OK();
828 }
829 }
830#endif
831}
832
833enum sp_return sp_blocking_write(struct sp_port *port, const void *buf, size_t count, unsigned int timeout)
834{
835 TRACE("%p, %p, %d, %d", port, buf, count, timeout);
836
837 CHECK_OPEN_PORT();
838
839 if (!buf)
840 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
841
842 if (timeout)
843 DEBUG("Writing %d bytes to port %s, timeout %d ms", count, port->name, timeout);
844 else
845 DEBUG("Writing %d bytes to port %s, no timeout", count, port->name);
846
847 if (count == 0)
848 RETURN_VALUE("0", 0);
849
850#ifdef _WIN32
851 DWORD bytes_written = 0;
852 BOOL result;
853
854 /* Wait for previous non-blocking write to complete, if any. */
855 if (port->writing) {
856 DEBUG("Waiting for previous write to complete");
857 result = GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
858 port->writing = 0;
859 if (!result)
860 RETURN_FAIL("Previous write failed to complete");
861 DEBUG("Previous write completed");
862 }
863
864 /* Set timeout. */
865 port->timeouts.WriteTotalTimeoutConstant = timeout;
866 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
867 RETURN_FAIL("SetCommTimeouts() failed");
868
869 /* Start write. */
870 if (WriteFile(port->hdl, buf, count, NULL, &port->write_ovl) == 0) {
871 if (GetLastError() == ERROR_IO_PENDING) {
872 DEBUG("Waiting for write to complete");
873 GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
874 DEBUG("Write completed, %d/%d bytes written", bytes_written, count);
875 RETURN_VALUE("%d", bytes_written);
876 } else {
877 RETURN_FAIL("WriteFile() failed");
878 }
879 } else {
880 DEBUG("Write completed immediately");
881 RETURN_VALUE("%d", count);
882 }
883#else
884 size_t bytes_written = 0;
885 unsigned char *ptr = (unsigned char *) buf;
886 struct timeval start, delta, now, end = {0, 0};
887 fd_set fds;
888 int result;
889
890 if (timeout) {
891 /* Get time at start of operation. */
892 gettimeofday(&start, NULL);
893 /* Define duration of timeout. */
894 delta.tv_sec = timeout / 1000;
895 delta.tv_usec = (timeout % 1000) * 1000;
896 /* Calculate time at which we should give up. */
897 timeradd(&start, &delta, &end);
898 }
899
900 /* Loop until we have written the requested number of bytes. */
901 while (bytes_written < count)
902 {
903 /* Wait until space is available. */
904 FD_ZERO(&fds);
905 FD_SET(port->fd, &fds);
906 if (timeout) {
907 gettimeofday(&now, NULL);
908 if (timercmp(&now, &end, >)) {
909 DEBUG("write timed out");
910 RETURN_VALUE("%d", bytes_written);
911 }
912 timersub(&end, &now, &delta);
913 }
914 result = select(port->fd + 1, NULL, &fds, NULL, timeout ? &delta : NULL);
915 if (result < 0) {
916 if (errno == EINTR) {
917 DEBUG("select() call was interrupted, repeating");
918 continue;
919 } else {
920 RETURN_FAIL("select() failed");
921 }
922 } else if (result == 0) {
923 DEBUG("write timed out");
924 RETURN_VALUE("%d", bytes_written);
925 }
926
927 /* Do write. */
928 result = write(port->fd, ptr, count - bytes_written);
929
930 if (result < 0) {
931 if (errno == EAGAIN)
932 /* This shouldn't happen because we did a select() first, but handle anyway. */
933 continue;
934 else
935 /* This is an actual failure. */
936 RETURN_FAIL("write() failed");
937 }
938
939 bytes_written += result;
940 ptr += result;
941 }
942
943 RETURN_VALUE("%d", bytes_written);
944#endif
945}
946
947enum sp_return sp_nonblocking_write(struct sp_port *port, const void *buf, size_t count)
948{
949 TRACE("%p, %p, %d", port, buf, count);
950
951 CHECK_OPEN_PORT();
952
953 if (!buf)
954 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
955
956 DEBUG("Writing up to %d bytes to port %s", count, port->name);
957
958 if (count == 0)
959 RETURN_VALUE("0", 0);
960
961#ifdef _WIN32
962 DWORD written = 0;
963 BYTE *ptr = (BYTE *) buf;
964
965 /* Check whether previous write is complete. */
966 if (port->writing) {
967 if (HasOverlappedIoCompleted(&port->write_ovl)) {
968 DEBUG("Previous write completed");
969 port->writing = 0;
970 } else {
971 DEBUG("Previous write not complete");
972 /* Can't take a new write until the previous one finishes. */
973 RETURN_VALUE("0", 0);
974 }
975 }
976
977 /* Set timeout. */
978 port->timeouts.WriteTotalTimeoutConstant = 0;
979 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
980 RETURN_FAIL("SetCommTimeouts() failed");
981
982 /* Keep writing data until the OS has to actually start an async IO for it.
983 * At that point we know the buffer is full. */
984 while (written < count)
985 {
986 /* Copy first byte of user buffer. */
987 port->pending_byte = *ptr++;
988
989 /* Start asynchronous write. */
990 if (WriteFile(port->hdl, &port->pending_byte, 1, NULL, &port->write_ovl) == 0) {
991 if (GetLastError() == ERROR_IO_PENDING) {
992 DEBUG("Asynchronous write started");
993 port->writing = 1;
994 RETURN_VALUE("%d", ++written);
995 } else {
996 /* Actual failure of some kind. */
997 RETURN_FAIL("WriteFile() failed");
998 }
999 } else {
1000 DEBUG("Single byte written immediately.");
1001 written++;
1002 }
1003 }
1004
1005 DEBUG("All bytes written immediately.");
1006
1007 RETURN_VALUE("%d", written);
1008#else
1009 /* Returns the number of bytes written, or -1 upon failure. */
1010 ssize_t written = write(port->fd, buf, count);
1011
1012 if (written < 0)
1013 RETURN_FAIL("write() failed");
1014 else
1015 RETURN_VALUE("%d", written);
1016#endif
1017}
1018
1019enum sp_return sp_blocking_read(struct sp_port *port, void *buf, size_t count, unsigned int timeout)
1020{
1021 TRACE("%p, %p, %d, %d", port, buf, count, timeout);
1022
1023 CHECK_OPEN_PORT();
1024
1025 if (!buf)
1026 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
1027
1028 if (timeout)
1029 DEBUG("Reading %d bytes from port %s, timeout %d ms", count, port->name, timeout);
1030 else
1031 DEBUG("Reading %d bytes from port %s, no timeout", count, port->name);
1032
1033 if (count == 0)
1034 RETURN_VALUE("0", 0);
1035
1036#ifdef _WIN32
1037 DWORD bytes_read = 0;
1038
1039 /* Set timeout. */
1040 port->timeouts.ReadIntervalTimeout = 0;
1041 port->timeouts.ReadTotalTimeoutConstant = timeout;
1042 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
1043 RETURN_FAIL("SetCommTimeouts() failed");
1044
1045 /* Start read. */
1046 if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0) {
1047 if (GetLastError() == ERROR_IO_PENDING) {
1048 DEBUG("Waiting for read to complete");
1049 GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE);
1050 DEBUG("Read completed, %d/%d bytes read", bytes_read, count);
1051 RETURN_VALUE("%d", bytes_read);
1052 } else {
1053 RETURN_FAIL("ReadFile() failed");
1054 }
1055 } else {
1056 DEBUG("Read completed immediately");
1057 RETURN_VALUE("%d", count);
1058 }
1059#else
1060 size_t bytes_read = 0;
1061 unsigned char *ptr = (unsigned char *) buf;
1062 struct timeval start, delta, now, end = {0, 0};
1063 fd_set fds;
1064 int result;
1065
1066 if (timeout) {
1067 /* Get time at start of operation. */
1068 gettimeofday(&start, NULL);
1069 /* Define duration of timeout. */
1070 delta.tv_sec = timeout / 1000;
1071 delta.tv_usec = (timeout % 1000) * 1000;
1072 /* Calculate time at which we should give up. */
1073 timeradd(&start, &delta, &end);
1074 }
1075
1076 /* Loop until we have the requested number of bytes. */
1077 while (bytes_read < count)
1078 {
1079 /* Wait until data is available. */
1080 FD_ZERO(&fds);
1081 FD_SET(port->fd, &fds);
1082 if (timeout) {
1083 gettimeofday(&now, NULL);
1084 if (timercmp(&now, &end, >))
1085 /* Timeout has expired. */
1086 RETURN_VALUE("%d", bytes_read);
1087 timersub(&end, &now, &delta);
1088 }
1089 result = select(port->fd + 1, &fds, NULL, NULL, timeout ? &delta : NULL);
1090 if (result < 0) {
1091 if (errno == EINTR) {
1092 DEBUG("select() call was interrupted, repeating");
1093 continue;
1094 } else {
1095 RETURN_FAIL("select() failed");
1096 }
1097 } else if (result == 0) {
1098 DEBUG("read timed out");
1099 RETURN_VALUE("%d", bytes_read);
1100 }
1101
1102 /* Do read. */
1103 result = read(port->fd, ptr, count - bytes_read);
1104
1105 if (result < 0) {
1106 if (errno == EAGAIN)
1107 /* This shouldn't happen because we did a select() first, but handle anyway. */
1108 continue;
1109 else
1110 /* This is an actual failure. */
1111 RETURN_FAIL("read() failed");
1112 }
1113
1114 bytes_read += result;
1115 ptr += result;
1116 }
1117
1118 RETURN_VALUE("%d", bytes_read);
1119#endif
1120}
1121
1122enum sp_return sp_nonblocking_read(struct sp_port *port, void *buf, size_t count)
1123{
1124 TRACE("%p, %p, %d", port, buf, count);
1125
1126 CHECK_OPEN_PORT();
1127
1128 if (!buf)
1129 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
1130
1131 DEBUG("Reading up to %d bytes from port %s", count, port->name);
1132
1133#ifdef _WIN32
1134 DWORD bytes_read;
1135
1136 /* Set timeout. */
1137 port->timeouts.ReadIntervalTimeout = MAXDWORD;
1138 port->timeouts.ReadTotalTimeoutConstant = 0;
1139 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
1140 RETURN_FAIL("SetCommTimeouts() failed");
1141
1142 /* Do read. */
1143 if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0)
1144 RETURN_FAIL("ReadFile() failed");
1145
1146 /* Get number of bytes read. */
1147 GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE);
1148
1149 RETURN_VALUE("%d", bytes_read);
1150#else
1151 ssize_t bytes_read;
1152
1153 /* Returns the number of bytes read, or -1 upon failure. */
1154 if ((bytes_read = read(port->fd, buf, count)) < 0) {
1155 if (errno == EAGAIN)
1156 /* No bytes available. */
1157 bytes_read = 0;
1158 else
1159 /* This is an actual failure. */
1160 RETURN_FAIL("read() failed");
1161 }
1162 RETURN_VALUE("%d", bytes_read);
1163#endif
1164}
1165
1166enum sp_return sp_input_waiting(struct sp_port *port)
1167{
1168 TRACE("%p", port);
1169
1170 CHECK_OPEN_PORT();
1171
1172 DEBUG("Checking input bytes waiting on port %s", port->name);
1173
1174#ifdef _WIN32
1175 DWORD errors;
1176 COMSTAT comstat;
1177
1178 if (ClearCommError(port->hdl, &errors, &comstat) == 0)
1179 RETURN_FAIL("ClearComError() failed");
1180 RETURN_VALUE("%d", comstat.cbInQue);
1181#else
1182 int bytes_waiting;
1183 if (ioctl(port->fd, TIOCINQ, &bytes_waiting) < 0)
1184 RETURN_FAIL("TIOCINQ ioctl failed");
1185 RETURN_VALUE("%d", bytes_waiting);
1186#endif
1187}
1188
1189enum sp_return sp_output_waiting(struct sp_port *port)
1190{
1191 TRACE("%p", port);
1192
1193 CHECK_OPEN_PORT();
1194
1195 DEBUG("Checking output bytes waiting on port %s", port->name);
1196
1197#ifdef _WIN32
1198 DWORD errors;
1199 COMSTAT comstat;
1200
1201 if (ClearCommError(port->hdl, &errors, &comstat) == 0)
1202 RETURN_FAIL("ClearComError() failed");
1203 RETURN_VALUE("%d", comstat.cbOutQue);
1204#else
1205 int bytes_waiting;
1206 if (ioctl(port->fd, TIOCOUTQ, &bytes_waiting) < 0)
1207 RETURN_FAIL("TIOCOUTQ ioctl failed");
1208 RETURN_VALUE("%d", bytes_waiting);
1209#endif
1210}
1211
1212#ifdef __linux__
1213static enum sp_return get_baudrate(int fd, int *baudrate)
1214{
1215 void *data;
1216
1217 TRACE("%d, %p", fd, baudrate);
1218
1219 DEBUG("Getting baud rate");
1220
1221 if (!(data = malloc(get_termios_size())))
1222 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
1223
1224 if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1225 free(data);
1226 RETURN_FAIL("getting termios failed");
1227 }
1228
1229 *baudrate = get_termios_speed(data);
1230
1231 free(data);
1232
1233 RETURN_OK();
1234}
1235
1236static enum sp_return set_baudrate(int fd, int baudrate)
1237{
1238 void *data;
1239
1240 TRACE("%d, %d", fd, baudrate);
1241
1242 DEBUG("Getting baud rate");
1243
1244 if (!(data = malloc(get_termios_size())))
1245 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
1246
1247 if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1248 free(data);
1249 RETURN_FAIL("getting termios failed");
1250 }
1251
1252 DEBUG("Setting baud rate");
1253
1254 set_termios_speed(data, baudrate);
1255
1256 if (ioctl(fd, get_termios_set_ioctl(), data) < 0) {
1257 free(data);
1258 RETURN_FAIL("setting termios failed");
1259 }
1260
1261 free(data);
1262
1263 RETURN_OK();
1264}
1265
1266#ifdef USE_TERMIOX
1267static enum sp_return get_flow(int fd, int *flow)
1268{
1269 void *data;
1270
1271 TRACE("%d, %p", fd, flow);
1272
1273 DEBUG("Getting advanced flow control");
1274
1275 if (!(data = malloc(get_termiox_size())))
1276 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
1277
1278 if (ioctl(fd, TCGETX, data) < 0) {
1279 free(data);
1280 RETURN_FAIL("getting termiox failed");
1281 }
1282
1283 *flow = get_termiox_flow(data);
1284
1285 free(data);
1286
1287 RETURN_OK();
1288}
1289
1290static enum sp_return set_flow(int fd, int flow)
1291{
1292 void *data;
1293
1294 TRACE("%d, %d", fd, flow);
1295
1296 DEBUG("Getting advanced flow control");
1297
1298 if (!(data = malloc(get_termiox_size())))
1299 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
1300
1301 if (ioctl(fd, TCGETX, data) < 0) {
1302 free(data);
1303 RETURN_FAIL("getting termiox failed");
1304 }
1305
1306 DEBUG("Setting advanced flow control");
1307
1308 set_termiox_flow(data, flow);
1309
1310 if (ioctl(fd, TCSETX, data) < 0) {
1311 free(data);
1312 RETURN_FAIL("setting termiox failed");
1313 }
1314
1315 free(data);
1316
1317 RETURN_OK();
1318}
1319#endif /* USE_TERMIOX */
1320#endif /* __linux__ */
1321
1322static enum sp_return get_config(struct sp_port *port, struct port_data *data,
1323 struct sp_port_config *config)
1324{
1325 unsigned int i;
1326
1327 TRACE("%p, %p, %p", port, data, config);
1328
1329 DEBUG("Getting configuration for port %s", port->name);
1330
1331#ifdef _WIN32
1332 if (!GetCommState(port->hdl, &data->dcb))
1333 RETURN_FAIL("GetCommState() failed");
1334
1335 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1336 if (data->dcb.BaudRate == std_baudrates[i].index) {
1337 config->baudrate = std_baudrates[i].value;
1338 break;
1339 }
1340 }
1341
1342 if (i == NUM_STD_BAUDRATES)
1343 /* BaudRate field can be either an index or a custom baud rate. */
1344 config->baudrate = data->dcb.BaudRate;
1345
1346 config->bits = data->dcb.ByteSize;
1347
1348 if (data->dcb.fParity)
1349 switch (data->dcb.Parity) {
1350 case NOPARITY:
1351 config->parity = SP_PARITY_NONE;
1352 break;
1353 case ODDPARITY:
1354 config->parity = SP_PARITY_ODD;
1355 break;
1356 case EVENPARITY:
1357 config->parity = SP_PARITY_EVEN;
1358 break;
1359 case MARKPARITY:
1360 config->parity = SP_PARITY_MARK;
1361 break;
1362 case SPACEPARITY:
1363 config->parity = SP_PARITY_SPACE;
1364 break;
1365 default:
1366 config->parity = -1;
1367 }
1368 else
1369 config->parity = SP_PARITY_NONE;
1370
1371 switch (data->dcb.StopBits) {
1372 case ONESTOPBIT:
1373 config->stopbits = 1;
1374 break;
1375 case TWOSTOPBITS:
1376 config->stopbits = 2;
1377 break;
1378 default:
1379 config->stopbits = -1;
1380 }
1381
1382 switch (data->dcb.fRtsControl) {
1383 case RTS_CONTROL_DISABLE:
1384 config->rts = SP_RTS_OFF;
1385 break;
1386 case RTS_CONTROL_ENABLE:
1387 config->rts = SP_RTS_ON;
1388 break;
1389 case RTS_CONTROL_HANDSHAKE:
1390 config->rts = SP_RTS_FLOW_CONTROL;
1391 break;
1392 default:
1393 config->rts = -1;
1394 }
1395
1396 config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
1397
1398 switch (data->dcb.fDtrControl) {
1399 case DTR_CONTROL_DISABLE:
1400 config->dtr = SP_DTR_OFF;
1401 break;
1402 case DTR_CONTROL_ENABLE:
1403 config->dtr = SP_DTR_ON;
1404 break;
1405 case DTR_CONTROL_HANDSHAKE:
1406 config->dtr = SP_DTR_FLOW_CONTROL;
1407 break;
1408 default:
1409 config->dtr = -1;
1410 }
1411
1412 config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
1413
1414 if (data->dcb.fInX) {
1415 if (data->dcb.fOutX)
1416 config->xon_xoff = SP_XONXOFF_INOUT;
1417 else
1418 config->xon_xoff = SP_XONXOFF_IN;
1419 } else {
1420 if (data->dcb.fOutX)
1421 config->xon_xoff = SP_XONXOFF_OUT;
1422 else
1423 config->xon_xoff = SP_XONXOFF_DISABLED;
1424 }
1425
1426#else // !_WIN32
1427
1428 if (tcgetattr(port->fd, &data->term) < 0)
1429 RETURN_FAIL("tcgetattr() failed");
1430
1431 if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
1432 RETURN_FAIL("TIOCMGET ioctl failed");
1433
1434#ifdef USE_TERMIOX
1435 int ret = get_flow(port->fd, &data->flow);
1436
1437 if (ret == SP_ERR_FAIL && errno == EINVAL)
1438 data->termiox_supported = 0;
1439 else if (ret < 0)
1440 RETURN_CODEVAL(ret);
1441 else
1442 data->termiox_supported = 1;
1443#else
1444 data->termiox_supported = 0;
1445#endif
1446
1447 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1448 if (cfgetispeed(&data->term) == std_baudrates[i].index) {
1449 config->baudrate = std_baudrates[i].value;
1450 break;
1451 }
1452 }
1453
1454 if (i == NUM_STD_BAUDRATES) {
1455#ifdef __APPLE__
1456 config->baudrate = (int)data->term.c_ispeed;
1457#elif defined(__linux__)
1458 TRY(get_baudrate(port->fd, &config->baudrate));
1459#else
1460 config->baudrate = -1;
1461#endif
1462 }
1463
1464 switch (data->term.c_cflag & CSIZE) {
1465 case CS8:
1466 config->bits = 8;
1467 break;
1468 case CS7:
1469 config->bits = 7;
1470 break;
1471 case CS6:
1472 config->bits = 6;
1473 break;
1474 case CS5:
1475 config->bits = 5;
1476 break;
1477 default:
1478 config->bits = -1;
1479 }
1480
1481 if (!(data->term.c_cflag & PARENB) && (data->term.c_iflag & IGNPAR))
1482 config->parity = SP_PARITY_NONE;
1483 else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR))
1484 config->parity = -1;
1485#ifdef CMSPAR
1486 else if (data->term.c_cflag & CMSPAR)
1487 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_MARK : SP_PARITY_SPACE;
1488#endif
1489 else
1490 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
1491
1492 config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1;
1493
1494 if (data->term.c_cflag & CRTSCTS) {
1495 config->rts = SP_RTS_FLOW_CONTROL;
1496 config->cts = SP_CTS_FLOW_CONTROL;
1497 } else {
1498 if (data->termiox_supported && data->flow & RTS_FLOW)
1499 config->rts = SP_RTS_FLOW_CONTROL;
1500 else
1501 config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
1502
1503 config->cts = (data->termiox_supported && data->flow & CTS_FLOW) ?
1504 SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
1505 }
1506
1507 if (data->termiox_supported && data->flow & DTR_FLOW)
1508 config->dtr = SP_DTR_FLOW_CONTROL;
1509 else
1510 config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
1511
1512 config->dsr = (data->termiox_supported && data->flow & DSR_FLOW) ?
1513 SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
1514
1515 if (data->term.c_iflag & IXOFF) {
1516 if (data->term.c_iflag & IXON)
1517 config->xon_xoff = SP_XONXOFF_INOUT;
1518 else
1519 config->xon_xoff = SP_XONXOFF_IN;
1520 } else {
1521 if (data->term.c_iflag & IXON)
1522 config->xon_xoff = SP_XONXOFF_OUT;
1523 else
1524 config->xon_xoff = SP_XONXOFF_DISABLED;
1525 }
1526#endif
1527
1528 RETURN_OK();
1529}
1530
1531static enum sp_return set_config(struct sp_port *port, struct port_data *data,
1532 const struct sp_port_config *config)
1533{
1534 unsigned int i;
1535#ifdef __APPLE__
1536 BAUD_TYPE baud_nonstd;
1537
1538 baud_nonstd = B0;
1539#endif
1540#ifdef __linux__
1541 int baud_nonstd = 0;
1542#endif
1543
1544 TRACE("%p, %p, %p", port, data, config);
1545
1546 DEBUG("Setting configuration for port %s", port->name);
1547
1548#ifdef _WIN32
1549 if (config->baudrate >= 0) {
1550 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1551 if (config->baudrate == std_baudrates[i].value) {
1552 data->dcb.BaudRate = std_baudrates[i].index;
1553 break;
1554 }
1555 }
1556
1557 if (i == NUM_STD_BAUDRATES)
1558 data->dcb.BaudRate = config->baudrate;
1559 }
1560
1561 if (config->bits >= 0)
1562 data->dcb.ByteSize = config->bits;
1563
1564 if (config->parity >= 0) {
1565 switch (config->parity) {
1566 /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */
1567 case SP_PARITY_NONE:
1568 data->dcb.Parity = NOPARITY;
1569 break;
1570 case SP_PARITY_ODD:
1571 data->dcb.Parity = ODDPARITY;
1572 break;
1573 case SP_PARITY_EVEN:
1574 data->dcb.Parity = EVENPARITY;
1575 break;
1576 case SP_PARITY_MARK:
1577 data->dcb.Parity = MARKPARITY;
1578 break;
1579 case SP_PARITY_SPACE:
1580 data->dcb.Parity = SPACEPARITY;
1581 break;
1582 default:
1583 RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
1584 }
1585 }
1586
1587 if (config->stopbits >= 0) {
1588 switch (config->stopbits) {
1589 /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
1590 case 1:
1591 data->dcb.StopBits = ONESTOPBIT;
1592 break;
1593 case 2:
1594 data->dcb.StopBits = TWOSTOPBITS;
1595 break;
1596 default:
1597 RETURN_ERROR(SP_ERR_ARG, "Invalid stop bit setting");
1598 }
1599 }
1600
1601 if (config->rts >= 0) {
1602 switch (config->rts) {
1603 case SP_RTS_OFF:
1604 data->dcb.fRtsControl = RTS_CONTROL_DISABLE;
1605 break;
1606 case SP_RTS_ON:
1607 data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
1608 break;
1609 case SP_RTS_FLOW_CONTROL:
1610 data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
1611 break;
1612 default:
1613 RETURN_ERROR(SP_ERR_ARG, "Invalid RTS setting");
1614 }
1615 }
1616
1617 if (config->cts >= 0) {
1618 switch (config->cts) {
1619 case SP_CTS_IGNORE:
1620 data->dcb.fOutxCtsFlow = FALSE;
1621 break;
1622 case SP_CTS_FLOW_CONTROL:
1623 data->dcb.fOutxCtsFlow = TRUE;
1624 break;
1625 default:
1626 RETURN_ERROR(SP_ERR_ARG, "Invalid CTS setting");
1627 }
1628 }
1629
1630 if (config->dtr >= 0) {
1631 switch (config->dtr) {
1632 case SP_DTR_OFF:
1633 data->dcb.fDtrControl = DTR_CONTROL_DISABLE;
1634 break;
1635 case SP_DTR_ON:
1636 data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
1637 break;
1638 case SP_DTR_FLOW_CONTROL:
1639 data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
1640 break;
1641 default:
1642 RETURN_ERROR(SP_ERR_ARG, "Invalid DTR setting");
1643 }
1644 }
1645
1646 if (config->dsr >= 0) {
1647 switch (config->dsr) {
1648 case SP_DSR_IGNORE:
1649 data->dcb.fOutxDsrFlow = FALSE;
1650 break;
1651 case SP_DSR_FLOW_CONTROL:
1652 data->dcb.fOutxDsrFlow = TRUE;
1653 break;
1654 default:
1655 RETURN_ERROR(SP_ERR_ARG, "Invalid DSR setting");
1656 }
1657 }
1658
1659 if (config->xon_xoff >= 0) {
1660 switch (config->xon_xoff) {
1661 case SP_XONXOFF_DISABLED:
1662 data->dcb.fInX = FALSE;
1663 data->dcb.fOutX = FALSE;
1664 break;
1665 case SP_XONXOFF_IN:
1666 data->dcb.fInX = TRUE;
1667 data->dcb.fOutX = FALSE;
1668 break;
1669 case SP_XONXOFF_OUT:
1670 data->dcb.fInX = FALSE;
1671 data->dcb.fOutX = TRUE;
1672 break;
1673 case SP_XONXOFF_INOUT:
1674 data->dcb.fInX = TRUE;
1675 data->dcb.fOutX = TRUE;
1676 break;
1677 default:
1678 RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
1679 }
1680 }
1681
1682 if (!SetCommState(port->hdl, &data->dcb))
1683 RETURN_FAIL("SetCommState() failed");
1684
1685#else /* !_WIN32 */
1686
1687 int controlbits;
1688
1689 if (config->baudrate >= 0) {
1690 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1691 if (config->baudrate == std_baudrates[i].value) {
1692 if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
1693 RETURN_FAIL("cfsetospeed() failed");
1694
1695 if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
1696 RETURN_FAIL("cfsetispeed() failed");
1697 break;
1698 }
1699 }
1700
1701 /* Non-standard baud rate */
1702 if (i == NUM_STD_BAUDRATES) {
1703#ifdef __APPLE__
1704 /* Set "dummy" baud rate. */
1705 if (cfsetspeed(&data->term, B9600) < 0)
1706 RETURN_FAIL("cfsetspeed() failed");
1707 baud_nonstd = config->baudrate;
1708#elif defined(__linux__)
1709 baud_nonstd = 1;
1710#else
1711 RETURN_ERROR(SP_ERR_SUPP, "Non-standard baudrate not supported");
1712#endif
1713 }
1714 }
1715
1716 if (config->bits >= 0) {
1717 data->term.c_cflag &= ~CSIZE;
1718 switch (config->bits) {
1719 case 8:
1720 data->term.c_cflag |= CS8;
1721 break;
1722 case 7:
1723 data->term.c_cflag |= CS7;
1724 break;
1725 case 6:
1726 data->term.c_cflag |= CS6;
1727 break;
1728 case 5:
1729 data->term.c_cflag |= CS5;
1730 break;
1731 default:
1732 RETURN_ERROR(SP_ERR_ARG, "Invalid data bits setting");
1733 }
1734 }
1735
1736 if (config->parity >= 0) {
1737 data->term.c_iflag &= ~IGNPAR;
1738 data->term.c_cflag &= ~(PARENB | PARODD);
1739#ifdef CMSPAR
1740 data->term.c_cflag &= ~CMSPAR;
1741#endif
1742 switch (config->parity) {
1743 case SP_PARITY_NONE:
1744 data->term.c_iflag |= IGNPAR;
1745 break;
1746 case SP_PARITY_EVEN:
1747 data->term.c_cflag |= PARENB;
1748 break;
1749 case SP_PARITY_ODD:
1750 data->term.c_cflag |= PARENB | PARODD;
1751 break;
1752#ifdef CMSPAR
1753 case SP_PARITY_MARK:
1754 data->term.c_cflag |= PARENB | PARODD;
1755 data->term.c_cflag |= CMSPAR;
1756 break;
1757 case SP_PARITY_SPACE:
1758 data->term.c_cflag |= PARENB;
1759 data->term.c_cflag |= CMSPAR;
1760 break;
1761#else
1762 case SP_PARITY_MARK:
1763 case SP_PARITY_SPACE:
1764 RETURN_ERROR(SP_ERR_SUPP, "Mark/space parity not supported");
1765#endif
1766 default:
1767 RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
1768 }
1769 }
1770
1771 if (config->stopbits >= 0) {
1772 data->term.c_cflag &= ~CSTOPB;
1773 switch (config->stopbits) {
1774 case 1:
1775 data->term.c_cflag &= ~CSTOPB;
1776 break;
1777 case 2:
1778 data->term.c_cflag |= CSTOPB;
1779 break;
1780 default:
1781 RETURN_ERROR(SP_ERR_ARG, "Invalid stop bits setting");
1782 }
1783 }
1784
1785 if (config->rts >= 0 || config->cts >= 0) {
1786 if (data->termiox_supported) {
1787 data->flow &= ~(RTS_FLOW | CTS_FLOW);
1788 switch (config->rts) {
1789 case SP_RTS_OFF:
1790 case SP_RTS_ON:
1791 controlbits = TIOCM_RTS;
1792 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
1793 RETURN_FAIL("Setting RTS signal level failed");
1794 break;
1795 case SP_RTS_FLOW_CONTROL:
1796 data->flow |= RTS_FLOW;
1797 break;
1798 default:
1799 break;
1800 }
1801 if (config->cts == SP_CTS_FLOW_CONTROL)
1802 data->flow |= CTS_FLOW;
1803
1804 if (data->flow & (RTS_FLOW | CTS_FLOW))
1805 data->term.c_iflag |= CRTSCTS;
1806 else
1807 data->term.c_iflag &= ~CRTSCTS;
1808 } else {
1809 /* Asymmetric use of RTS/CTS not supported. */
1810 if (data->term.c_iflag & CRTSCTS) {
1811 /* Flow control can only be disabled for both RTS & CTS together. */
1812 if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
1813 if (config->cts != SP_CTS_IGNORE)
1814 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
1815 }
1816 if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
1817 if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
1818 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
1819 }
1820 } else {
1821 /* Flow control can only be enabled for both RTS & CTS together. */
1822 if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
1823 ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
1824 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be enabled together");
1825 }
1826
1827 if (config->rts >= 0) {
1828 if (config->rts == SP_RTS_FLOW_CONTROL) {
1829 data->term.c_iflag |= CRTSCTS;
1830 } else {
1831 controlbits = TIOCM_RTS;
1832 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
1833 &controlbits) < 0)
1834 RETURN_FAIL("Setting RTS signal level failed");
1835 }
1836 }
1837 }
1838 }
1839
1840 if (config->dtr >= 0 || config->dsr >= 0) {
1841 if (data->termiox_supported) {
1842 data->flow &= ~(DTR_FLOW | DSR_FLOW);
1843 switch (config->dtr) {
1844 case SP_DTR_OFF:
1845 case SP_DTR_ON:
1846 controlbits = TIOCM_DTR;
1847 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
1848 RETURN_FAIL("Setting DTR signal level failed");
1849 break;
1850 case SP_DTR_FLOW_CONTROL:
1851 data->flow |= DTR_FLOW;
1852 break;
1853 default:
1854 break;
1855 }
1856 if (config->dsr == SP_DSR_FLOW_CONTROL)
1857 data->flow |= DSR_FLOW;
1858 } else {
1859 /* DTR/DSR flow control not supported. */
1860 if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
1861 RETURN_ERROR(SP_ERR_SUPP, "DTR/DSR flow control not supported");
1862
1863 if (config->dtr >= 0) {
1864 controlbits = TIOCM_DTR;
1865 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
1866 &controlbits) < 0)
1867 RETURN_FAIL("Setting DTR signal level failed");
1868 }
1869 }
1870 }
1871
1872 if (config->xon_xoff >= 0) {
1873 data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
1874 switch (config->xon_xoff) {
1875 case SP_XONXOFF_DISABLED:
1876 break;
1877 case SP_XONXOFF_IN:
1878 data->term.c_iflag |= IXOFF;
1879 break;
1880 case SP_XONXOFF_OUT:
1881 data->term.c_iflag |= IXON | IXANY;
1882 break;
1883 case SP_XONXOFF_INOUT:
1884 data->term.c_iflag |= IXON | IXOFF | IXANY;
1885 break;
1886 default:
1887 RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
1888 }
1889 }
1890
1891 if (tcsetattr(port->fd, TCSANOW, &data->term) < 0)
1892 RETURN_FAIL("tcsetattr() failed");
1893
1894#ifdef __APPLE__
1895 if (baud_nonstd != B0) {
1896 if (ioctl(port->fd, IOSSIOSPEED, &baud_nonstd) == -1)
1897 RETURN_FAIL("IOSSIOSPEED ioctl failed");
1898 /* Set baud rates in data->term to correct, but incompatible
1899 * with tcsetattr() value, same as delivered by tcgetattr(). */
1900 if (cfsetspeed(&data->term, baud_nonstd) < 0)
1901 RETURN_FAIL("cfsetspeed() failed");
1902 }
1903#elif defined(__linux__)
1904 if (baud_nonstd)
1905 TRY(set_baudrate(port->fd, config->baudrate));
1906#ifdef USE_TERMIOX
1907 if (data->termiox_supported)
1908 TRY(set_flow(port->fd, data->flow));
1909#endif
1910#endif
1911
1912#endif /* !_WIN32 */
1913
1914 RETURN_OK();
1915}
1916
1917enum sp_return sp_new_config(struct sp_port_config **config_ptr)
1918{
1919 struct sp_port_config *config;
1920
1921 TRACE("%p", config_ptr);
1922
1923 if (!config_ptr)
1924 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
1925
1926 *config_ptr = NULL;
1927
1928 if (!(config = malloc(sizeof(struct sp_port_config))))
1929 RETURN_ERROR(SP_ERR_MEM, "config malloc failed");
1930
1931 config->baudrate = -1;
1932 config->bits = -1;
1933 config->parity = -1;
1934 config->stopbits = -1;
1935 config->rts = -1;
1936 config->cts = -1;
1937 config->dtr = -1;
1938 config->dsr = -1;
1939
1940 *config_ptr = config;
1941
1942 RETURN_OK();
1943}
1944
1945void sp_free_config(struct sp_port_config *config)
1946{
1947 TRACE("%p", config);
1948
1949 if (!config)
1950 DEBUG("Null config");
1951 else
1952 free(config);
1953
1954 RETURN();
1955}
1956
1957enum sp_return sp_get_config(struct sp_port *port, struct sp_port_config *config)
1958{
1959 struct port_data data;
1960
1961 TRACE("%p, %p", port, config);
1962
1963 CHECK_OPEN_PORT();
1964
1965 if (!config)
1966 RETURN_ERROR(SP_ERR_ARG, "Null config");
1967
1968 TRY(get_config(port, &data, config));
1969
1970 RETURN_OK();
1971}
1972
1973enum sp_return sp_set_config(struct sp_port *port, const struct sp_port_config *config)
1974{
1975 struct port_data data;
1976 struct sp_port_config prev_config;
1977
1978 TRACE("%p, %p", port, config);
1979
1980 CHECK_OPEN_PORT();
1981
1982 if (!config)
1983 RETURN_ERROR(SP_ERR_ARG, "Null config");
1984
1985 TRY(get_config(port, &data, &prev_config));
1986 TRY(set_config(port, &data, config));
1987
1988 RETURN_OK();
1989}
1990
1991#define CREATE_ACCESSORS(x, type) \
1992enum sp_return sp_set_##x(struct sp_port *port, type x) { \
1993 struct port_data data; \
1994 struct sp_port_config config; \
1995 TRACE("%p, %d", port, x); \
1996 CHECK_OPEN_PORT(); \
1997 TRY(get_config(port, &data, &config)); \
1998 config.x = x; \
1999 TRY(set_config(port, &data, &config)); \
2000 RETURN_OK(); \
2001} \
2002enum sp_return sp_get_config_##x(const struct sp_port_config *config, type *x) { \
2003 TRACE("%p, %p", config, x); \
2004 if (!config) \
2005 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
2006 *x = config->x; \
2007 RETURN_OK(); \
2008} \
2009enum sp_return sp_set_config_##x(struct sp_port_config *config, type x) { \
2010 TRACE("%p, %d", config, x); \
2011 if (!config) \
2012 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
2013 config->x = x; \
2014 RETURN_OK(); \
2015}
2016
2017CREATE_ACCESSORS(baudrate, int)
2018CREATE_ACCESSORS(bits, int)
2019CREATE_ACCESSORS(parity, enum sp_parity)
2020CREATE_ACCESSORS(stopbits, int)
2021CREATE_ACCESSORS(rts, enum sp_rts)
2022CREATE_ACCESSORS(cts, enum sp_cts)
2023CREATE_ACCESSORS(dtr, enum sp_dtr)
2024CREATE_ACCESSORS(dsr, enum sp_dsr)
2025CREATE_ACCESSORS(xon_xoff, enum sp_xonxoff)
2026
2027enum sp_return sp_set_config_flowcontrol(struct sp_port_config *config, enum sp_flowcontrol flowcontrol)
2028{
2029 if (!config)
2030 RETURN_ERROR(SP_ERR_ARG, "Null configuration");
2031
2032 if (flowcontrol > SP_FLOWCONTROL_DTRDSR)
2033 RETURN_ERROR(SP_ERR_ARG, "Invalid flow control setting");
2034
2035 if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
2036 config->xon_xoff = SP_XONXOFF_INOUT;
2037 else
2038 config->xon_xoff = SP_XONXOFF_DISABLED;
2039
2040 if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
2041 config->rts = SP_RTS_FLOW_CONTROL;
2042 config->cts = SP_CTS_FLOW_CONTROL;
2043 } else {
2044 if (config->rts == SP_RTS_FLOW_CONTROL)
2045 config->rts = SP_RTS_ON;
2046 config->cts = SP_CTS_IGNORE;
2047 }
2048
2049 if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
2050 config->dtr = SP_DTR_FLOW_CONTROL;
2051 config->dsr = SP_DSR_FLOW_CONTROL;
2052 } else {
2053 if (config->dtr == SP_DTR_FLOW_CONTROL)
2054 config->dtr = SP_DTR_ON;
2055 config->dsr = SP_DSR_IGNORE;
2056 }
2057
2058 RETURN_OK();
2059}
2060
2061enum sp_return sp_set_flowcontrol(struct sp_port *port, enum sp_flowcontrol flowcontrol)
2062{
2063 struct port_data data;
2064 struct sp_port_config config;
2065
2066 TRACE("%p, %d", port, flowcontrol);
2067
2068 CHECK_OPEN_PORT();
2069
2070 TRY(get_config(port, &data, &config));
2071
2072 TRY(sp_set_config_flowcontrol(&config, flowcontrol));
2073
2074 TRY(set_config(port, &data, &config));
2075
2076 RETURN_OK();
2077}
2078
2079enum sp_return sp_get_signals(struct sp_port *port, enum sp_signal *signals)
2080{
2081 TRACE("%p, %p", port, signals);
2082
2083 CHECK_OPEN_PORT();
2084
2085 if (!signals)
2086 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
2087
2088 DEBUG("Getting control signals for port %s", port->name);
2089
2090 *signals = 0;
2091#ifdef _WIN32
2092 DWORD bits;
2093 if (GetCommModemStatus(port->hdl, &bits) == 0)
2094 RETURN_FAIL("GetCommModemStatus() failed");
2095 if (bits & MS_CTS_ON)
2096 *signals |= SP_SIG_CTS;
2097 if (bits & MS_DSR_ON)
2098 *signals |= SP_SIG_DSR;
2099 if (bits & MS_RLSD_ON)
2100 *signals |= SP_SIG_DCD;
2101 if (bits & MS_RING_ON)
2102 *signals |= SP_SIG_RI;
2103#else
2104 int bits;
2105 if (ioctl(port->fd, TIOCMGET, &bits) < 0)
2106 RETURN_FAIL("TIOCMGET ioctl failed");
2107 if (bits & TIOCM_CTS)
2108 *signals |= SP_SIG_CTS;
2109 if (bits & TIOCM_DSR)
2110 *signals |= SP_SIG_DSR;
2111 if (bits & TIOCM_CAR)
2112 *signals |= SP_SIG_DCD;
2113 if (bits & TIOCM_RNG)
2114 *signals |= SP_SIG_RI;
2115#endif
2116 RETURN_OK();
2117}
2118
2119enum sp_return sp_start_break(struct sp_port *port)
2120{
2121 TRACE("%p", port);
2122
2123 CHECK_OPEN_PORT();
2124#ifdef _WIN32
2125 if (SetCommBreak(port->hdl) == 0)
2126 RETURN_FAIL("SetCommBreak() failed");
2127#else
2128 if (ioctl(port->fd, TIOCSBRK, 1) < 0)
2129 RETURN_FAIL("TIOCSBRK ioctl failed");
2130#endif
2131
2132 RETURN_OK();
2133}
2134
2135enum sp_return sp_end_break(struct sp_port *port)
2136{
2137 TRACE("%p", port);
2138
2139 CHECK_OPEN_PORT();
2140#ifdef _WIN32
2141 if (ClearCommBreak(port->hdl) == 0)
2142 RETURN_FAIL("ClearCommBreak() failed");
2143#else
2144 if (ioctl(port->fd, TIOCCBRK, 1) < 0)
2145 RETURN_FAIL("TIOCCBRK ioctl failed");
2146#endif
2147
2148 RETURN_OK();
2149}
2150
2151int sp_last_error_code(void)
2152{
2153 TRACE("");
2154#ifdef _WIN32
2155 RETURN_VALUE("%d", GetLastError());
2156#else
2157 RETURN_VALUE("%d", errno);
2158#endif
2159}
2160
2161char *sp_last_error_message(void)
2162{
2163 TRACE("");
2164
2165#ifdef _WIN32
2166 LPVOID message;
2167 DWORD error = GetLastError();
2168
2169 FormatMessage(
2170 FORMAT_MESSAGE_ALLOCATE_BUFFER |
2171 FORMAT_MESSAGE_FROM_SYSTEM |
2172 FORMAT_MESSAGE_IGNORE_INSERTS,
2173 NULL,
2174 error,
2175 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
2176 (LPTSTR) &message,
2177 0, NULL );
2178
2179 RETURN_VALUE("%s", message);
2180#else
2181 RETURN_VALUE("%s", strerror(errno));
2182#endif
2183}
2184
2185void sp_free_error_message(char *message)
2186{
2187 TRACE("%s", message);
2188
2189#ifdef _WIN32
2190 LocalFree(message);
2191#else
2192 (void)message;
2193#endif
2194
2195 RETURN();
2196}
2197
2198void sp_set_debug_handler(void (*handler)(const char *format, ...))
2199{
2200 TRACE("%p", handler);
2201
2202 sp_debug_handler = handler;
2203
2204 RETURN();
2205}
2206
2207void sp_default_debug_handler(const char *format, ...)
2208{
2209 va_list args;
2210 va_start(args, format);
2211 if (getenv("LIBSERIALPORT_DEBUG")) {
2212 fputs("sp: ", stderr);
2213 vfprintf(stderr, format, args);
2214 }
2215 va_end(args);
2216}
Serial port access library