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Remove various unused code in configure.ac.
[libserialport.git] / serialport.c
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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#ifndef __ANDROID__
54#include "linux/serial.h"
55#endif
56#include "linux_termios.h"
57
58/* TCGETX/TCSETX is not available everywhere. */
59#if defined(TCGETX) && defined(TCSETX) && defined(HAVE_TERMIOX)
60#define USE_TERMIOX
61#endif
62#endif
63
64/* TIOCINQ/TIOCOUTQ is not available everywhere. */
65#if !defined(TIOCINQ) && defined(FIONREAD)
66#define TIOCINQ FIONREAD
67#endif
68#if !defined(TIOCOUTQ) && defined(FIONWRITE)
69#define TIOCOUTQ FIONWRITE
70#endif
71
72#ifndef _WIN32
73#include "linux_termios.h"
74#endif
75
76#include "libserialport.h"
77
78struct sp_port {
79 char *name;
80#ifdef _WIN32
81 HANDLE hdl;
82 COMMTIMEOUTS timeouts;
83 OVERLAPPED write_ovl;
84 OVERLAPPED read_ovl;
85 BYTE pending_byte;
86 BOOL writing;
87#else
88 int fd;
89#endif
90};
91
92struct sp_port_config {
93 int baudrate;
94 int bits;
95 enum sp_parity parity;
96 int stopbits;
97 enum sp_rts rts;
98 enum sp_cts cts;
99 enum sp_dtr dtr;
100 enum sp_dsr dsr;
101 enum sp_xonxoff xon_xoff;
102};
103
104struct port_data {
105#ifdef _WIN32
106 DCB dcb;
107#else
108 struct termios term;
109 int controlbits;
110 int termiox_supported;
111 int flow;
112#endif
113};
114
115/* Standard baud rates. */
116#ifdef _WIN32
117#define BAUD_TYPE DWORD
118#define BAUD(n) {CBR_##n, n}
119#else
120#define BAUD_TYPE speed_t
121#define BAUD(n) {B##n, n}
122#endif
123
124struct std_baudrate {
125 BAUD_TYPE index;
126 int value;
127};
128
129const struct std_baudrate std_baudrates[] = {
130#ifdef _WIN32
131 /*
132 * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
133 * have documented CBR_* macros.
134 */
135 BAUD(110), BAUD(300), BAUD(600), BAUD(1200), BAUD(2400), BAUD(4800),
136 BAUD(9600), BAUD(14400), BAUD(19200), BAUD(38400), BAUD(57600),
137 BAUD(115200), BAUD(128000), BAUD(256000),
138#else
139 BAUD(50), BAUD(75), BAUD(110), BAUD(134), BAUD(150), BAUD(200),
140 BAUD(300), BAUD(600), BAUD(1200), BAUD(1800), BAUD(2400), BAUD(4800),
141 BAUD(9600), BAUD(19200), BAUD(38400), BAUD(57600), BAUD(115200),
142 BAUD(230400),
143#if !defined(__APPLE__) && !defined(__OpenBSD__)
144 BAUD(460800),
145#endif
146#endif
147};
148
149void (*sp_debug_handler)(const char *format, ...) = sp_default_debug_handler;
150
151#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
152#define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)
153
154/* Debug output macros. */
155#define DEBUG(fmt, ...) do { if (sp_debug_handler) sp_debug_handler(fmt ".\n", ##__VA_ARGS__); } while (0)
156#define DEBUG_ERROR(err, msg) DEBUG("%s returning " #err ": " msg, __func__)
157#define DEBUG_FAIL(msg) do { \
158 char *errmsg = sp_last_error_message(); \
159 DEBUG("%s returning SP_ERR_FAIL: " msg ": %s", __func__, errmsg); \
160 sp_free_error_message(errmsg); \
161} while (0);
162#define RETURN() do { DEBUG("%s returning", __func__); return; } while(0)
163#define RETURN_CODE(x) do { DEBUG("%s returning " #x, __func__); return x; } while (0)
164#define RETURN_CODEVAL(x) do { \
165 switch (x) { \
166 case SP_OK: RETURN_CODE(SP_OK); \
167 case SP_ERR_ARG: RETURN_CODE(SP_ERR_ARG); \
168 case SP_ERR_FAIL: RETURN_CODE(SP_ERR_FAIL); \
169 case SP_ERR_MEM: RETURN_CODE(SP_ERR_MEM); \
170 case SP_ERR_SUPP: RETURN_CODE(SP_ERR_SUPP); \
171 } \
172} while (0)
173#define RETURN_OK() RETURN_CODE(SP_OK);
174#define RETURN_ERROR(err, msg) do { DEBUG_ERROR(err, msg); return err; } while (0)
175#define RETURN_FAIL(msg) do { DEBUG_FAIL(msg); return SP_ERR_FAIL; } while (0)
176#define RETURN_VALUE(fmt, x) do { \
177 typeof(x) _x = x; \
178 DEBUG("%s returning " fmt, __func__, _x); \
179 return _x; \
180} while (0)
181#define SET_ERROR(val, err, msg) do { DEBUG_ERROR(err, msg); val = err; } while (0)
182#define SET_FAIL(val, msg) do { DEBUG_FAIL(msg); val = SP_ERR_FAIL; } while (0)
183#define TRACE(fmt, ...) DEBUG("%s(" fmt ") called", __func__, ##__VA_ARGS__)
184
185#define TRY(x) do { int ret = x; if (ret != SP_OK) RETURN_CODEVAL(ret); } while (0)
186
187/* Helper functions. */
188static struct sp_port **list_append(struct sp_port **list, const char *portname);
189static enum sp_return get_config(struct sp_port *port, struct port_data *data,
190 struct sp_port_config *config);
191static enum sp_return set_config(struct sp_port *port, struct port_data *data,
192 const struct sp_port_config *config);
193
194enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
195{
196 struct sp_port *port;
197 int len;
198
199 TRACE("%s, %p", portname, port_ptr);
200
201 if (!port_ptr)
202 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
203
204 *port_ptr = NULL;
205
206 if (!portname)
207 RETURN_ERROR(SP_ERR_ARG, "Null port name");
208
209 DEBUG("Building structure for port %s", portname);
210
211 if (!(port = malloc(sizeof(struct sp_port))))
212 RETURN_ERROR(SP_ERR_MEM, "Port structure malloc failed");
213
214 len = strlen(portname) + 1;
215
216 if (!(port->name = malloc(len))) {
217 free(port);
218 RETURN_ERROR(SP_ERR_MEM, "Port name malloc failed");
219 }
220
221 memcpy(port->name, portname, len);
222
223#ifdef _WIN32
224 port->hdl = INVALID_HANDLE_VALUE;
225#else
226 port->fd = -1;
227#endif
228
229 *port_ptr = port;
230
231 RETURN_OK();
232}
233
234char *sp_get_port_name(const struct sp_port *port)
235{
236 TRACE("%p", port);
237
238 if (!port)
239 return NULL;
240
241 RETURN_VALUE("%s", port->name);
242}
243
244enum sp_return sp_get_port_handle(const struct sp_port *port, void *result_ptr)
245{
246 TRACE("%p, %p", port, result_ptr);
247
248 if (!port)
249 RETURN_ERROR(SP_ERR_ARG, "Null port");
250
251#ifdef _WIN32
252 HANDLE *handle_ptr = result_ptr;
253 *handle_ptr = port->hdl;
254#else
255 int *fd_ptr = result_ptr;
256 *fd_ptr = port->fd;
257#endif
258
259 RETURN_OK();
260}
261
262enum sp_return sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr)
263{
264 TRACE("%p, %p", port, copy_ptr);
265
266 if (!copy_ptr)
267 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
268
269 *copy_ptr = NULL;
270
271 if (!port)
272 RETURN_ERROR(SP_ERR_ARG, "Null port");
273
274 if (!port->name)
275 RETURN_ERROR(SP_ERR_ARG, "Null port name");
276
277 DEBUG("Copying port structure");
278
279 RETURN_VALUE("%p", sp_get_port_by_name(port->name, copy_ptr));
280}
281
282void sp_free_port(struct sp_port *port)
283{
284 TRACE("%p", port);
285
286 if (!port) {
287 DEBUG("Null port");
288 RETURN();
289 }
290
291 DEBUG("Freeing port structure");
292
293 if (port->name)
294 free(port->name);
295
296 free(port);
297
298 RETURN();
299}
300
301static struct sp_port **list_append(struct sp_port **list, const char *portname)
302{
303 void *tmp;
304 unsigned int count;
305
306 for (count = 0; list[count]; count++);
307 if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
308 goto fail;
309 list = tmp;
310 if (sp_get_port_by_name(portname, &list[count]) != SP_OK)
311 goto fail;
312 list[count + 1] = NULL;
313 return list;
314
315fail:
316 sp_free_port_list(list);
317 return NULL;
318}
319
320enum sp_return sp_list_ports(struct sp_port ***list_ptr)
321{
322 struct sp_port **list;
323 int ret = SP_ERR_SUPP;
324
325 TRACE("%p", list_ptr);
326
327 if (!list_ptr)
328 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
329
330 DEBUG("Enumerating ports");
331
332 if (!(list = malloc(sizeof(struct sp_port **))))
333 RETURN_ERROR(SP_ERR_MEM, "Port list malloc failed");
334
335 list[0] = NULL;
336
337#ifdef _WIN32
338 HKEY key;
339 TCHAR *value, *data;
340 DWORD max_value_len, max_data_size, max_data_len;
341 DWORD value_len, data_size, data_len;
342 DWORD type, index = 0;
343 char *name;
344 int name_len;
345
346 ret = SP_OK;
347
348 DEBUG("Opening registry key");
349 if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
350 0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS) {
351 SET_FAIL(ret, "RegOpenKeyEx() failed");
352 goto out_done;
353 }
354 DEBUG("Querying registry key value and data sizes");
355 if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
356 &max_value_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS) {
357 SET_FAIL(ret, "RegQueryInfoKey() failed");
358 goto out_close;
359 }
360 max_data_len = max_data_size / sizeof(TCHAR);
361 if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) {
362 SET_ERROR(ret, SP_ERR_MEM, "registry value malloc failed");
363 goto out_close;
364 }
365 if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) {
366 SET_ERROR(ret, SP_ERR_MEM, "registry data malloc failed");
367 goto out_free_value;
368 }
369 DEBUG("Iterating over values");
370 while (
371 value_len = max_value_len + 1,
372 data_size = max_data_size,
373 RegEnumValue(key, index, value, &value_len,
374 NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS)
375 {
376 data_len = data_size / sizeof(TCHAR);
377 data[data_len] = '\0';
378#ifdef UNICODE
379 name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL)
380#else
381 name_len = data_len + 1;
382#endif
383 if (!(name = malloc(name_len))) {
384 SET_ERROR(ret, SP_ERR_MEM, "registry port name malloc failed");
385 goto out;
386 }
387#ifdef UNICODE
388 WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL);
389#else
390 strcpy(name, data);
391#endif
392 if (type == REG_SZ) {
393 DEBUG("Found port %s", name);
394 if (!(list = list_append(list, name))) {
395 SET_ERROR(ret, SP_ERR_MEM, "list append failed");
396 goto out;
397 }
398 }
399 index++;
400 }
401out:
402 free(data);
403out_free_value:
404 free(value);
405out_close:
406 RegCloseKey(key);
407out_done:
408#endif
409#ifdef __APPLE__
410 mach_port_t master;
411 CFMutableDictionaryRef classes;
412 io_iterator_t iter;
413 char *path;
414 io_object_t port;
415 CFTypeRef cf_path;
416 Boolean result;
417
418 ret = SP_OK;
419
420 DEBUG("Getting IOKit master port");
421 if (IOMasterPort(MACH_PORT_NULL, &master) != KERN_SUCCESS) {
422 SET_FAIL(ret, "IOMasterPort() failed");
423 goto out_done;
424 }
425
426 DEBUG("Creating matching dictionary");
427 if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue))) {
428 SET_FAIL(ret, "IOServiceMatching() failed");
429 goto out_done;
430 }
431
432 CFDictionarySetValue(classes,
433 CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDAllTypes));
434
435 DEBUG("Getting matching services");
436 if (IOServiceGetMatchingServices(master, classes, &iter) != KERN_SUCCESS) {
437 SET_FAIL(ret, "IOServiceGetMatchingServices() failed");
438 goto out_done;
439 }
440
441 if (!(path = malloc(PATH_MAX))) {
442 SET_ERROR(ret, SP_ERR_MEM, "device path malloc failed");
443 goto out_release;
444 }
445
446 DEBUG("Iterating over results");
447 while ((port = IOIteratorNext(iter))) {
448 cf_path = IORegistryEntryCreateCFProperty(port,
449 CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0);
450 if (cf_path) {
451 result = CFStringGetCString(cf_path,
452 path, PATH_MAX, kCFStringEncodingASCII);
453 CFRelease(cf_path);
454 if (result) {
455 DEBUG("Found port %s", path);
456 if (!(list = list_append(list, path))) {
457 SET_ERROR(ret, SP_ERR_MEM, "list append failed");
458 IOObjectRelease(port);
459 goto out;
460 }
461 }
462 }
463 IOObjectRelease(port);
464 }
465out:
466 free(path);
467out_release:
468 IOObjectRelease(iter);
469out_done:
470#endif
471#if defined(__linux__) && defined(HAVE_LIBUDEV)
472 struct udev *ud;
473 struct udev_enumerate *ud_enumerate;
474 struct udev_list_entry *ud_list;
475 struct udev_list_entry *ud_entry;
476 const char *path;
477 struct udev_device *ud_dev, *ud_parent;
478 const char *name;
479 const char *driver;
480 int fd, ioctl_result;
481 struct serial_struct serial_info;
482
483 ret = SP_OK;
484
485 DEBUG("Enumerating tty devices");
486 ud = udev_new();
487 ud_enumerate = udev_enumerate_new(ud);
488 udev_enumerate_add_match_subsystem(ud_enumerate, "tty");
489 udev_enumerate_scan_devices(ud_enumerate);
490 ud_list = udev_enumerate_get_list_entry(ud_enumerate);
491 DEBUG("Iterating over results");
492 udev_list_entry_foreach(ud_entry, ud_list) {
493 path = udev_list_entry_get_name(ud_entry);
494 DEBUG("Found device %s", path);
495 ud_dev = udev_device_new_from_syspath(ud, path);
496 /* If there is no parent device, this is a virtual tty. */
497 ud_parent = udev_device_get_parent(ud_dev);
498 if (ud_parent == NULL) {
499 DEBUG("No parent device, assuming virtual tty");
500 udev_device_unref(ud_dev);
501 continue;
502 }
503 name = udev_device_get_devnode(ud_dev);
504 /* The serial8250 driver has a hardcoded number of ports.
505 * The only way to tell which actually exist on a given system
506 * is to try to open them and make an ioctl call. */
507 driver = udev_device_get_driver(ud_parent);
508 if (driver && !strcmp(driver, "serial8250")) {
509 DEBUG("serial8250 device, attempting to open");
510 if ((fd = open(name, O_RDWR | O_NONBLOCK | O_NOCTTY)) < 0) {
511 DEBUG("open failed, skipping");
512 goto skip;
513 }
514 ioctl_result = ioctl(fd, TIOCGSERIAL, &serial_info);
515 close(fd);
516 if (ioctl_result != 0) {
517 DEBUG("ioctl failed, skipping");
518 goto skip;
519 }
520 if (serial_info.type == PORT_UNKNOWN) {
521 DEBUG("port type is unknown, skipping");
522 goto skip;
523 }
524 }
525 DEBUG("Found port %s", name);
526 list = list_append(list, name);
527skip:
528 udev_device_unref(ud_dev);
529 if (!list) {
530 SET_ERROR(ret, SP_ERR_MEM, "list append failed");
531 goto out;
532 }
533 }
534out:
535 udev_enumerate_unref(ud_enumerate);
536 udev_unref(ud);
537#endif
538
539 switch (ret) {
540 case SP_OK:
541 *list_ptr = list;
542 RETURN_OK();
543 case SP_ERR_SUPP:
544 DEBUG_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform");
545 default:
546 if (list)
547 sp_free_port_list(list);
548 *list_ptr = NULL;
549 return ret;
550 }
551}
552
553void sp_free_port_list(struct sp_port **list)
554{
555 unsigned int i;
556
557 TRACE("%p", list);
558
559 if (!list) {
560 DEBUG("Null list");
561 RETURN();
562 }
563
564 DEBUG("Freeing port list");
565
566 for (i = 0; list[i]; i++)
567 sp_free_port(list[i]);
568 free(list);
569
570 RETURN();
571}
572
573#define CHECK_PORT() do { \
574 if (port == NULL) \
575 RETURN_ERROR(SP_ERR_ARG, "Null port"); \
576 if (port->name == NULL) \
577 RETURN_ERROR(SP_ERR_ARG, "Null port name"); \
578} while (0)
579#ifdef _WIN32
580#define CHECK_PORT_HANDLE() do { \
581 if (port->hdl == INVALID_HANDLE_VALUE) \
582 RETURN_ERROR(SP_ERR_ARG, "Invalid port handle"); \
583} while (0)
584#else
585#define CHECK_PORT_HANDLE() do { \
586 if (port->fd < 0) \
587 RETURN_ERROR(SP_ERR_ARG, "Invalid port fd"); \
588} while (0)
589#endif
590#define CHECK_OPEN_PORT() do { \
591 CHECK_PORT(); \
592 CHECK_PORT_HANDLE(); \
593} while (0)
594
595enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
596{
597 struct port_data data;
598 struct sp_port_config config;
599 enum sp_return ret;
600
601 TRACE("%p, 0x%x", port, flags);
602
603 CHECK_PORT();
604
605 if (flags > (SP_MODE_READ | SP_MODE_WRITE))
606 RETURN_ERROR(SP_ERR_ARG, "Invalid flags");
607
608 DEBUG("Opening port %s", port->name);
609
610#ifdef _WIN32
611 DWORD desired_access = 0, flags_and_attributes = 0, errors;
612 char *escaped_port_name;
613 COMSTAT status;
614
615 /* Prefix port name with '\\.\' to work with ports above COM9. */
616 if (!(escaped_port_name = malloc(strlen(port->name + 5))))
617 RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
618 sprintf(escaped_port_name, "\\\\.\\%s", port->name);
619
620 /* Map 'flags' to the OS-specific settings. */
621 flags_and_attributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED;
622 if (flags & SP_MODE_READ)
623 desired_access |= GENERIC_READ;
624 if (flags & SP_MODE_WRITE)
625 desired_access |= GENERIC_WRITE;
626
627 port->hdl = CreateFile(escaped_port_name, desired_access, 0, 0,
628 OPEN_EXISTING, flags_and_attributes, 0);
629
630 free(escaped_port_name);
631
632 if (port->hdl == INVALID_HANDLE_VALUE)
633 RETURN_FAIL("port CreateFile() failed");
634
635 /* All timeouts initially disabled. */
636 port->timeouts.ReadIntervalTimeout = 0;
637 port->timeouts.ReadTotalTimeoutMultiplier = 0;
638 port->timeouts.ReadTotalTimeoutConstant = 0;
639 port->timeouts.WriteTotalTimeoutMultiplier = 0;
640 port->timeouts.WriteTotalTimeoutConstant = 0;
641
642 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) {
643 sp_close(port);
644 RETURN_FAIL("SetCommTimeouts() failed");
645 }
646
647 /* Prepare OVERLAPPED structures. */
648 memset(&port->read_ovl, 0, sizeof(port->read_ovl));
649 memset(&port->write_ovl, 0, sizeof(port->write_ovl));
650 port->read_ovl.hEvent = INVALID_HANDLE_VALUE;
651 port->write_ovl.hEvent = INVALID_HANDLE_VALUE;
652 if ((port->read_ovl.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL)) == INVALID_HANDLE_VALUE) {
653 sp_close(port);
654 RETURN_FAIL("read event CreateEvent() failed");
655 }
656 if ((port->write_ovl.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL)) == INVALID_HANDLE_VALUE) {
657 sp_close(port);
658 RETURN_FAIL("write event CreateEvent() failed");
659 }
660
661 port->writing = FALSE;
662
663#else
664 int flags_local = O_NONBLOCK | O_NOCTTY;
665
666 /* Map 'flags' to the OS-specific settings. */
667 if (flags & (SP_MODE_READ | SP_MODE_WRITE))
668 flags_local |= O_RDWR;
669 else if (flags & SP_MODE_READ)
670 flags_local |= O_RDONLY;
671 else if (flags & SP_MODE_WRITE)
672 flags_local |= O_WRONLY;
673
674 if ((port->fd = open(port->name, flags_local)) < 0)
675 RETURN_FAIL("open() failed");
676#endif
677
678 ret = get_config(port, &data, &config);
679
680 if (ret < 0) {
681 sp_close(port);
682 RETURN_CODEVAL(ret);
683 }
684
685 /* Set sane port settings. */
686#ifdef _WIN32
687 data.dcb.fBinary = TRUE;
688 data.dcb.fDsrSensitivity = FALSE;
689 data.dcb.fErrorChar = FALSE;
690 data.dcb.fNull = FALSE;
691 data.dcb.fAbortOnError = TRUE;
692#else
693 /* Turn off all fancy termios tricks, give us a raw channel. */
694 data.term.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IMAXBEL);
695#ifdef IUCLC
696 data.term.c_iflag &= ~IUCLC;
697#endif
698 data.term.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET);
699#ifdef OLCUC
700 data.term.c_oflag &= ~OLCUC;
701#endif
702#ifdef NLDLY
703 data.term.c_oflag &= ~NLDLY;
704#endif
705#ifdef CRDLY
706 data.term.c_oflag &= ~CRDLY;
707#endif
708#ifdef TABDLY
709 data.term.c_oflag &= ~TABDLY;
710#endif
711#ifdef BSDLY
712 data.term.c_oflag &= ~BSDLY;
713#endif
714#ifdef VTDLY
715 data.term.c_oflag &= ~VTDLY;
716#endif
717#ifdef FFDLY
718 data.term.c_oflag &= ~FFDLY;
719#endif
720#ifdef OFILL
721 data.term.c_oflag &= ~OFILL;
722#endif
723 data.term.c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN);
724 data.term.c_cc[VMIN] = 0;
725 data.term.c_cc[VTIME] = 0;
726
727 /* Ignore modem status lines; enable receiver; leave control lines alone on close. */
728 data.term.c_cflag |= (CLOCAL | CREAD | HUPCL);
729#endif
730
731#ifdef _WIN32
732 if (ClearCommError(port->hdl, &errors, &status) == 0)
733 RETURN_FAIL("ClearCommError() failed");
734#endif
735
736 ret = set_config(port, &data, &config);
737
738 if (ret < 0) {
739 sp_close(port);
740 RETURN_CODEVAL(ret);
741 }
742
743 RETURN_OK();
744}
745
746enum sp_return sp_close(struct sp_port *port)
747{
748 TRACE("%p", port);
749
750 CHECK_OPEN_PORT();
751
752 DEBUG("Closing port %s", port->name);
753
754#ifdef _WIN32
755 /* Returns non-zero upon success, 0 upon failure. */
756 if (CloseHandle(port->hdl) == 0)
757 RETURN_FAIL("port CloseHandle() failed");
758 port->hdl = INVALID_HANDLE_VALUE;
759 /* Close event handle created for overlapped reads. */
760 if (port->read_ovl.hEvent != INVALID_HANDLE_VALUE && CloseHandle(port->read_ovl.hEvent) == 0)
761 RETURN_FAIL("read event CloseHandle() failed");
762 /* Close event handle created for overlapped writes. */
763 if (port->write_ovl.hEvent != INVALID_HANDLE_VALUE && CloseHandle(port->write_ovl.hEvent) == 0)
764 RETURN_FAIL("write event CloseHandle() failed");
765#else
766 /* Returns 0 upon success, -1 upon failure. */
767 if (close(port->fd) == -1)
768 RETURN_FAIL("close() failed");
769 port->fd = -1;
770#endif
771
772 RETURN_OK();
773}
774
775enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers)
776{
777 TRACE("%p, 0x%x", port, buffers);
778
779 CHECK_OPEN_PORT();
780
781 if (buffers > SP_BUF_BOTH)
782 RETURN_ERROR(SP_ERR_ARG, "Invalid buffer selection");
783
784 const char *buffer_names[] = {"no", "input", "output", "both"};
785
786 DEBUG("Flushing %s buffers on port %s", buffer_names[buffers], port->name);
787
788#ifdef _WIN32
789 DWORD flags = 0;
790 if (buffers & SP_BUF_INPUT)
791 flags |= PURGE_RXCLEAR;
792 if (buffers & SP_BUF_OUTPUT)
793 flags |= PURGE_TXCLEAR;
794
795 /* Returns non-zero upon success, 0 upon failure. */
796 if (PurgeComm(port->hdl, flags) == 0)
797 RETURN_FAIL("PurgeComm() failed");
798#else
799 int flags = 0;
800 if (buffers & SP_BUF_BOTH)
801 flags = TCIOFLUSH;
802 else if (buffers & SP_BUF_INPUT)
803 flags = TCIFLUSH;
804 else if (buffers & SP_BUF_OUTPUT)
805 flags = TCOFLUSH;
806
807 /* Returns 0 upon success, -1 upon failure. */
808 if (tcflush(port->fd, flags) < 0)
809 RETURN_FAIL("tcflush() failed");
810#endif
811 RETURN_OK();
812}
813
814enum sp_return sp_drain(struct sp_port *port)
815{
816 TRACE("%p", port);
817
818 CHECK_OPEN_PORT();
819
820 DEBUG("Draining port %s", port->name);
821
822#ifdef _WIN32
823 /* Returns non-zero upon success, 0 upon failure. */
824 if (FlushFileBuffers(port->hdl) == 0)
825 RETURN_FAIL("FlushFileBuffers() failed");
826 RETURN_OK();
827#else
828 int result;
829 while (1) {
830#ifdef __ANDROID__
831 int arg = 1;
832 result = ioctl(port->fd, TCSBRK, &arg);
833#else
834 result = tcdrain(port->fd);
835#endif
836 if (result < 0) {
837 if (errno == EINTR) {
838 DEBUG("tcdrain() was interrupted");
839 continue;
840 } else {
841 RETURN_FAIL("tcdrain() failed");
842 }
843 } else {
844 RETURN_OK();
845 }
846 }
847#endif
848}
849
850enum sp_return sp_blocking_write(struct sp_port *port, const void *buf, size_t count, unsigned int timeout)
851{
852 TRACE("%p, %p, %d, %d", port, buf, count, timeout);
853
854 CHECK_OPEN_PORT();
855
856 if (!buf)
857 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
858
859 if (timeout)
860 DEBUG("Writing %d bytes to port %s, timeout %d ms", count, port->name, timeout);
861 else
862 DEBUG("Writing %d bytes to port %s, no timeout", count, port->name);
863
864 if (count == 0)
865 RETURN_VALUE("0", 0);
866
867#ifdef _WIN32
868 DWORD bytes_written = 0;
869 BOOL result;
870
871 /* Wait for previous non-blocking write to complete, if any. */
872 if (port->writing) {
873 DEBUG("Waiting for previous write to complete");
874 result = GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
875 port->writing = 0;
876 if (!result)
877 RETURN_FAIL("Previous write failed to complete");
878 DEBUG("Previous write completed");
879 }
880
881 /* Set timeout. */
882 port->timeouts.WriteTotalTimeoutConstant = timeout;
883 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
884 RETURN_FAIL("SetCommTimeouts() failed");
885
886 /* Start write. */
887 if (WriteFile(port->hdl, buf, count, NULL, &port->write_ovl) == 0) {
888 if (GetLastError() == ERROR_IO_PENDING) {
889 DEBUG("Waiting for write to complete");
890 GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
891 DEBUG("Write completed, %d/%d bytes written", bytes_written, count);
892 RETURN_VALUE("%d", bytes_written);
893 } else {
894 RETURN_FAIL("WriteFile() failed");
895 }
896 } else {
897 DEBUG("Write completed immediately");
898 RETURN_VALUE("%d", count);
899 }
900#else
901 size_t bytes_written = 0;
902 unsigned char *ptr = (unsigned char *) buf;
903 struct timeval start, delta, now, end = {0, 0};
904 fd_set fds;
905 int result;
906
907 if (timeout) {
908 /* Get time at start of operation. */
909 gettimeofday(&start, NULL);
910 /* Define duration of timeout. */
911 delta.tv_sec = timeout / 1000;
912 delta.tv_usec = (timeout % 1000) * 1000;
913 /* Calculate time at which we should give up. */
914 timeradd(&start, &delta, &end);
915 }
916
917 /* Loop until we have written the requested number of bytes. */
918 while (bytes_written < count)
919 {
920 /* Wait until space is available. */
921 FD_ZERO(&fds);
922 FD_SET(port->fd, &fds);
923 if (timeout) {
924 gettimeofday(&now, NULL);
925 if (timercmp(&now, &end, >)) {
926 DEBUG("write timed out");
927 RETURN_VALUE("%d", bytes_written);
928 }
929 timersub(&end, &now, &delta);
930 }
931 result = select(port->fd + 1, NULL, &fds, NULL, timeout ? &delta : NULL);
932 if (result < 0) {
933 if (errno == EINTR) {
934 DEBUG("select() call was interrupted, repeating");
935 continue;
936 } else {
937 RETURN_FAIL("select() failed");
938 }
939 } else if (result == 0) {
940 DEBUG("write timed out");
941 RETURN_VALUE("%d", bytes_written);
942 }
943
944 /* Do write. */
945 result = write(port->fd, ptr, count - bytes_written);
946
947 if (result < 0) {
948 if (errno == EAGAIN)
949 /* This shouldn't happen because we did a select() first, but handle anyway. */
950 continue;
951 else
952 /* This is an actual failure. */
953 RETURN_FAIL("write() failed");
954 }
955
956 bytes_written += result;
957 ptr += result;
958 }
959
960 RETURN_VALUE("%d", bytes_written);
961#endif
962}
963
964enum sp_return sp_nonblocking_write(struct sp_port *port, const void *buf, size_t count)
965{
966 TRACE("%p, %p, %d", port, buf, count);
967
968 CHECK_OPEN_PORT();
969
970 if (!buf)
971 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
972
973 DEBUG("Writing up to %d bytes to port %s", count, port->name);
974
975 if (count == 0)
976 RETURN_VALUE("0", 0);
977
978#ifdef _WIN32
979 DWORD written = 0;
980 BYTE *ptr = (BYTE *) buf;
981
982 /* Check whether previous write is complete. */
983 if (port->writing) {
984 if (HasOverlappedIoCompleted(&port->write_ovl)) {
985 DEBUG("Previous write completed");
986 port->writing = 0;
987 } else {
988 DEBUG("Previous write not complete");
989 /* Can't take a new write until the previous one finishes. */
990 RETURN_VALUE("0", 0);
991 }
992 }
993
994 /* Set timeout. */
995 port->timeouts.WriteTotalTimeoutConstant = 0;
996 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
997 RETURN_FAIL("SetCommTimeouts() failed");
998
999 /* Keep writing data until the OS has to actually start an async IO for it.
1000 * At that point we know the buffer is full. */
1001 while (written < count)
1002 {
1003 /* Copy first byte of user buffer. */
1004 port->pending_byte = *ptr++;
1005
1006 /* Start asynchronous write. */
1007 if (WriteFile(port->hdl, &port->pending_byte, 1, NULL, &port->write_ovl) == 0) {
1008 if (GetLastError() == ERROR_IO_PENDING) {
1009 if (HasOverlappedIoCompleted(&port->write_ovl)) {
1010 DEBUG("Asynchronous write completed immediately");
1011 port->writing = 0;
1012 written++;
1013 continue;
1014 } else {
1015 DEBUG("Asynchronous write running");
1016 port->writing = 1;
1017 RETURN_VALUE("%d", ++written);
1018 }
1019 } else {
1020 /* Actual failure of some kind. */
1021 RETURN_FAIL("WriteFile() failed");
1022 }
1023 } else {
1024 DEBUG("Single byte written immediately");
1025 written++;
1026 }
1027 }
1028
1029 DEBUG("All bytes written immediately");
1030
1031 RETURN_VALUE("%d", written);
1032#else
1033 /* Returns the number of bytes written, or -1 upon failure. */
1034 ssize_t written = write(port->fd, buf, count);
1035
1036 if (written < 0)
1037 RETURN_FAIL("write() failed");
1038 else
1039 RETURN_VALUE("%d", written);
1040#endif
1041}
1042
1043enum sp_return sp_blocking_read(struct sp_port *port, void *buf, size_t count, unsigned int timeout)
1044{
1045 TRACE("%p, %p, %d, %d", port, buf, count, timeout);
1046
1047 CHECK_OPEN_PORT();
1048
1049 if (!buf)
1050 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
1051
1052 if (timeout)
1053 DEBUG("Reading %d bytes from port %s, timeout %d ms", count, port->name, timeout);
1054 else
1055 DEBUG("Reading %d bytes from port %s, no timeout", count, port->name);
1056
1057 if (count == 0)
1058 RETURN_VALUE("0", 0);
1059
1060#ifdef _WIN32
1061 DWORD bytes_read = 0;
1062
1063 /* Set timeout. */
1064 port->timeouts.ReadIntervalTimeout = 0;
1065 port->timeouts.ReadTotalTimeoutConstant = timeout;
1066 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
1067 RETURN_FAIL("SetCommTimeouts() failed");
1068
1069 /* Start read. */
1070 if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0) {
1071 if (GetLastError() == ERROR_IO_PENDING) {
1072 DEBUG("Waiting for read to complete");
1073 GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE);
1074 DEBUG("Read completed, %d/%d bytes read", bytes_read, count);
1075 RETURN_VALUE("%d", bytes_read);
1076 } else {
1077 RETURN_FAIL("ReadFile() failed");
1078 }
1079 } else {
1080 DEBUG("Read completed immediately");
1081 RETURN_VALUE("%d", count);
1082 }
1083#else
1084 size_t bytes_read = 0;
1085 unsigned char *ptr = (unsigned char *) buf;
1086 struct timeval start, delta, now, end = {0, 0};
1087 fd_set fds;
1088 int result;
1089
1090 if (timeout) {
1091 /* Get time at start of operation. */
1092 gettimeofday(&start, NULL);
1093 /* Define duration of timeout. */
1094 delta.tv_sec = timeout / 1000;
1095 delta.tv_usec = (timeout % 1000) * 1000;
1096 /* Calculate time at which we should give up. */
1097 timeradd(&start, &delta, &end);
1098 }
1099
1100 /* Loop until we have the requested number of bytes. */
1101 while (bytes_read < count)
1102 {
1103 /* Wait until data is available. */
1104 FD_ZERO(&fds);
1105 FD_SET(port->fd, &fds);
1106 if (timeout) {
1107 gettimeofday(&now, NULL);
1108 if (timercmp(&now, &end, >))
1109 /* Timeout has expired. */
1110 RETURN_VALUE("%d", bytes_read);
1111 timersub(&end, &now, &delta);
1112 }
1113 result = select(port->fd + 1, &fds, NULL, NULL, timeout ? &delta : NULL);
1114 if (result < 0) {
1115 if (errno == EINTR) {
1116 DEBUG("select() call was interrupted, repeating");
1117 continue;
1118 } else {
1119 RETURN_FAIL("select() failed");
1120 }
1121 } else if (result == 0) {
1122 DEBUG("read timed out");
1123 RETURN_VALUE("%d", bytes_read);
1124 }
1125
1126 /* Do read. */
1127 result = read(port->fd, ptr, count - bytes_read);
1128
1129 if (result < 0) {
1130 if (errno == EAGAIN)
1131 /* This shouldn't happen because we did a select() first, but handle anyway. */
1132 continue;
1133 else
1134 /* This is an actual failure. */
1135 RETURN_FAIL("read() failed");
1136 }
1137
1138 bytes_read += result;
1139 ptr += result;
1140 }
1141
1142 RETURN_VALUE("%d", bytes_read);
1143#endif
1144}
1145
1146enum sp_return sp_nonblocking_read(struct sp_port *port, void *buf, size_t count)
1147{
1148 TRACE("%p, %p, %d", port, buf, count);
1149
1150 CHECK_OPEN_PORT();
1151
1152 if (!buf)
1153 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
1154
1155 DEBUG("Reading up to %d bytes from port %s", count, port->name);
1156
1157#ifdef _WIN32
1158 DWORD bytes_read;
1159
1160 /* Set timeout. */
1161 port->timeouts.ReadIntervalTimeout = MAXDWORD;
1162 port->timeouts.ReadTotalTimeoutConstant = 0;
1163 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
1164 RETURN_FAIL("SetCommTimeouts() failed");
1165
1166 /* Do read. */
1167 if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0)
1168 RETURN_FAIL("ReadFile() failed");
1169
1170 /* Get number of bytes read. */
1171 if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0)
1172 RETURN_FAIL("GetOverlappedResult() failed");
1173
1174 RETURN_VALUE("%d", bytes_read);
1175#else
1176 ssize_t bytes_read;
1177
1178 /* Returns the number of bytes read, or -1 upon failure. */
1179 if ((bytes_read = read(port->fd, buf, count)) < 0) {
1180 if (errno == EAGAIN)
1181 /* No bytes available. */
1182 bytes_read = 0;
1183 else
1184 /* This is an actual failure. */
1185 RETURN_FAIL("read() failed");
1186 }
1187 RETURN_VALUE("%d", bytes_read);
1188#endif
1189}
1190
1191enum sp_return sp_input_waiting(struct sp_port *port)
1192{
1193 TRACE("%p", port);
1194
1195 CHECK_OPEN_PORT();
1196
1197 DEBUG("Checking input bytes waiting on port %s", port->name);
1198
1199#ifdef _WIN32
1200 DWORD errors;
1201 COMSTAT comstat;
1202
1203 if (ClearCommError(port->hdl, &errors, &comstat) == 0)
1204 RETURN_FAIL("ClearCommError() failed");
1205 RETURN_VALUE("%d", comstat.cbInQue);
1206#else
1207 int bytes_waiting;
1208 if (ioctl(port->fd, TIOCINQ, &bytes_waiting) < 0)
1209 RETURN_FAIL("TIOCINQ ioctl failed");
1210 RETURN_VALUE("%d", bytes_waiting);
1211#endif
1212}
1213
1214enum sp_return sp_output_waiting(struct sp_port *port)
1215{
1216 TRACE("%p", port);
1217
1218 CHECK_OPEN_PORT();
1219
1220 DEBUG("Checking output bytes waiting on port %s", port->name);
1221
1222#ifdef _WIN32
1223 DWORD errors;
1224 COMSTAT comstat;
1225
1226 if (ClearCommError(port->hdl, &errors, &comstat) == 0)
1227 RETURN_FAIL("ClearCommError() failed");
1228 RETURN_VALUE("%d", comstat.cbOutQue);
1229#else
1230 int bytes_waiting;
1231 if (ioctl(port->fd, TIOCOUTQ, &bytes_waiting) < 0)
1232 RETURN_FAIL("TIOCOUTQ ioctl failed");
1233 RETURN_VALUE("%d", bytes_waiting);
1234#endif
1235}
1236
1237#ifdef __linux__
1238static enum sp_return get_baudrate(int fd, int *baudrate)
1239{
1240 void *data;
1241
1242 TRACE("%d, %p", fd, baudrate);
1243
1244 DEBUG("Getting baud rate");
1245
1246 if (!(data = malloc(get_termios_size())))
1247 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
1248
1249 if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1250 free(data);
1251 RETURN_FAIL("getting termios failed");
1252 }
1253
1254 *baudrate = get_termios_speed(data);
1255
1256 free(data);
1257
1258 RETURN_OK();
1259}
1260
1261static enum sp_return set_baudrate(int fd, int baudrate)
1262{
1263 void *data;
1264
1265 TRACE("%d, %d", fd, baudrate);
1266
1267 DEBUG("Getting baud rate");
1268
1269 if (!(data = malloc(get_termios_size())))
1270 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
1271
1272 if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1273 free(data);
1274 RETURN_FAIL("getting termios failed");
1275 }
1276
1277 DEBUG("Setting baud rate");
1278
1279 set_termios_speed(data, baudrate);
1280
1281 if (ioctl(fd, get_termios_set_ioctl(), data) < 0) {
1282 free(data);
1283 RETURN_FAIL("setting termios failed");
1284 }
1285
1286 free(data);
1287
1288 RETURN_OK();
1289}
1290
1291#ifdef USE_TERMIOX
1292static enum sp_return get_flow(int fd, int *flow)
1293{
1294 void *data;
1295
1296 TRACE("%d, %p", fd, flow);
1297
1298 DEBUG("Getting advanced flow control");
1299
1300 if (!(data = malloc(get_termiox_size())))
1301 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
1302
1303 if (ioctl(fd, TCGETX, data) < 0) {
1304 free(data);
1305 RETURN_FAIL("getting termiox failed");
1306 }
1307
1308 *flow = get_termiox_flow(data);
1309
1310 free(data);
1311
1312 RETURN_OK();
1313}
1314
1315static enum sp_return set_flow(int fd, int flow)
1316{
1317 void *data;
1318
1319 TRACE("%d, %d", fd, flow);
1320
1321 DEBUG("Getting advanced flow control");
1322
1323 if (!(data = malloc(get_termiox_size())))
1324 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
1325
1326 if (ioctl(fd, TCGETX, data) < 0) {
1327 free(data);
1328 RETURN_FAIL("getting termiox failed");
1329 }
1330
1331 DEBUG("Setting advanced flow control");
1332
1333 set_termiox_flow(data, flow);
1334
1335 if (ioctl(fd, TCSETX, data) < 0) {
1336 free(data);
1337 RETURN_FAIL("setting termiox failed");
1338 }
1339
1340 free(data);
1341
1342 RETURN_OK();
1343}
1344#endif /* USE_TERMIOX */
1345#endif /* __linux__ */
1346
1347static enum sp_return get_config(struct sp_port *port, struct port_data *data,
1348 struct sp_port_config *config)
1349{
1350 unsigned int i;
1351
1352 TRACE("%p, %p, %p", port, data, config);
1353
1354 DEBUG("Getting configuration for port %s", port->name);
1355
1356#ifdef _WIN32
1357 if (!GetCommState(port->hdl, &data->dcb))
1358 RETURN_FAIL("GetCommState() failed");
1359
1360 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1361 if (data->dcb.BaudRate == std_baudrates[i].index) {
1362 config->baudrate = std_baudrates[i].value;
1363 break;
1364 }
1365 }
1366
1367 if (i == NUM_STD_BAUDRATES)
1368 /* BaudRate field can be either an index or a custom baud rate. */
1369 config->baudrate = data->dcb.BaudRate;
1370
1371 config->bits = data->dcb.ByteSize;
1372
1373 if (data->dcb.fParity)
1374 switch (data->dcb.Parity) {
1375 case NOPARITY:
1376 config->parity = SP_PARITY_NONE;
1377 break;
1378 case ODDPARITY:
1379 config->parity = SP_PARITY_ODD;
1380 break;
1381 case EVENPARITY:
1382 config->parity = SP_PARITY_EVEN;
1383 break;
1384 case MARKPARITY:
1385 config->parity = SP_PARITY_MARK;
1386 break;
1387 case SPACEPARITY:
1388 config->parity = SP_PARITY_SPACE;
1389 break;
1390 default:
1391 config->parity = -1;
1392 }
1393 else
1394 config->parity = SP_PARITY_NONE;
1395
1396 switch (data->dcb.StopBits) {
1397 case ONESTOPBIT:
1398 config->stopbits = 1;
1399 break;
1400 case TWOSTOPBITS:
1401 config->stopbits = 2;
1402 break;
1403 default:
1404 config->stopbits = -1;
1405 }
1406
1407 switch (data->dcb.fRtsControl) {
1408 case RTS_CONTROL_DISABLE:
1409 config->rts = SP_RTS_OFF;
1410 break;
1411 case RTS_CONTROL_ENABLE:
1412 config->rts = SP_RTS_ON;
1413 break;
1414 case RTS_CONTROL_HANDSHAKE:
1415 config->rts = SP_RTS_FLOW_CONTROL;
1416 break;
1417 default:
1418 config->rts = -1;
1419 }
1420
1421 config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
1422
1423 switch (data->dcb.fDtrControl) {
1424 case DTR_CONTROL_DISABLE:
1425 config->dtr = SP_DTR_OFF;
1426 break;
1427 case DTR_CONTROL_ENABLE:
1428 config->dtr = SP_DTR_ON;
1429 break;
1430 case DTR_CONTROL_HANDSHAKE:
1431 config->dtr = SP_DTR_FLOW_CONTROL;
1432 break;
1433 default:
1434 config->dtr = -1;
1435 }
1436
1437 config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
1438
1439 if (data->dcb.fInX) {
1440 if (data->dcb.fOutX)
1441 config->xon_xoff = SP_XONXOFF_INOUT;
1442 else
1443 config->xon_xoff = SP_XONXOFF_IN;
1444 } else {
1445 if (data->dcb.fOutX)
1446 config->xon_xoff = SP_XONXOFF_OUT;
1447 else
1448 config->xon_xoff = SP_XONXOFF_DISABLED;
1449 }
1450
1451#else // !_WIN32
1452
1453 if (tcgetattr(port->fd, &data->term) < 0)
1454 RETURN_FAIL("tcgetattr() failed");
1455
1456 if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
1457 RETURN_FAIL("TIOCMGET ioctl failed");
1458
1459#ifdef USE_TERMIOX
1460 int ret = get_flow(port->fd, &data->flow);
1461
1462 if (ret == SP_ERR_FAIL && errno == EINVAL)
1463 data->termiox_supported = 0;
1464 else if (ret < 0)
1465 RETURN_CODEVAL(ret);
1466 else
1467 data->termiox_supported = 1;
1468#else
1469 data->termiox_supported = 0;
1470#endif
1471
1472 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1473 if (cfgetispeed(&data->term) == std_baudrates[i].index) {
1474 config->baudrate = std_baudrates[i].value;
1475 break;
1476 }
1477 }
1478
1479 if (i == NUM_STD_BAUDRATES) {
1480#ifdef __APPLE__
1481 config->baudrate = (int)data->term.c_ispeed;
1482#elif defined(__linux__)
1483 TRY(get_baudrate(port->fd, &config->baudrate));
1484#else
1485 config->baudrate = -1;
1486#endif
1487 }
1488
1489 switch (data->term.c_cflag & CSIZE) {
1490 case CS8:
1491 config->bits = 8;
1492 break;
1493 case CS7:
1494 config->bits = 7;
1495 break;
1496 case CS6:
1497 config->bits = 6;
1498 break;
1499 case CS5:
1500 config->bits = 5;
1501 break;
1502 default:
1503 config->bits = -1;
1504 }
1505
1506 if (!(data->term.c_cflag & PARENB) && (data->term.c_iflag & IGNPAR))
1507 config->parity = SP_PARITY_NONE;
1508 else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR))
1509 config->parity = -1;
1510#ifdef CMSPAR
1511 else if (data->term.c_cflag & CMSPAR)
1512 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_MARK : SP_PARITY_SPACE;
1513#endif
1514 else
1515 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
1516
1517 config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1;
1518
1519 if (data->term.c_cflag & CRTSCTS) {
1520 config->rts = SP_RTS_FLOW_CONTROL;
1521 config->cts = SP_CTS_FLOW_CONTROL;
1522 } else {
1523 if (data->termiox_supported && data->flow & RTS_FLOW)
1524 config->rts = SP_RTS_FLOW_CONTROL;
1525 else
1526 config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
1527
1528 config->cts = (data->termiox_supported && data->flow & CTS_FLOW) ?
1529 SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
1530 }
1531
1532 if (data->termiox_supported && data->flow & DTR_FLOW)
1533 config->dtr = SP_DTR_FLOW_CONTROL;
1534 else
1535 config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
1536
1537 config->dsr = (data->termiox_supported && data->flow & DSR_FLOW) ?
1538 SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
1539
1540 if (data->term.c_iflag & IXOFF) {
1541 if (data->term.c_iflag & IXON)
1542 config->xon_xoff = SP_XONXOFF_INOUT;
1543 else
1544 config->xon_xoff = SP_XONXOFF_IN;
1545 } else {
1546 if (data->term.c_iflag & IXON)
1547 config->xon_xoff = SP_XONXOFF_OUT;
1548 else
1549 config->xon_xoff = SP_XONXOFF_DISABLED;
1550 }
1551#endif
1552
1553 RETURN_OK();
1554}
1555
1556static enum sp_return set_config(struct sp_port *port, struct port_data *data,
1557 const struct sp_port_config *config)
1558{
1559 unsigned int i;
1560#ifdef __APPLE__
1561 BAUD_TYPE baud_nonstd;
1562
1563 baud_nonstd = B0;
1564#endif
1565#ifdef __linux__
1566 int baud_nonstd = 0;
1567#endif
1568
1569 TRACE("%p, %p, %p", port, data, config);
1570
1571 DEBUG("Setting configuration for port %s", port->name);
1572
1573#ifdef _WIN32
1574 if (config->baudrate >= 0) {
1575 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1576 if (config->baudrate == std_baudrates[i].value) {
1577 data->dcb.BaudRate = std_baudrates[i].index;
1578 break;
1579 }
1580 }
1581
1582 if (i == NUM_STD_BAUDRATES)
1583 data->dcb.BaudRate = config->baudrate;
1584 }
1585
1586 if (config->bits >= 0)
1587 data->dcb.ByteSize = config->bits;
1588
1589 if (config->parity >= 0) {
1590 switch (config->parity) {
1591 case SP_PARITY_NONE:
1592 data->dcb.Parity = NOPARITY;
1593 break;
1594 case SP_PARITY_ODD:
1595 data->dcb.Parity = ODDPARITY;
1596 break;
1597 case SP_PARITY_EVEN:
1598 data->dcb.Parity = EVENPARITY;
1599 break;
1600 case SP_PARITY_MARK:
1601 data->dcb.Parity = MARKPARITY;
1602 break;
1603 case SP_PARITY_SPACE:
1604 data->dcb.Parity = SPACEPARITY;
1605 break;
1606 default:
1607 RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
1608 }
1609 }
1610
1611 if (config->stopbits >= 0) {
1612 switch (config->stopbits) {
1613 /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
1614 case 1:
1615 data->dcb.StopBits = ONESTOPBIT;
1616 break;
1617 case 2:
1618 data->dcb.StopBits = TWOSTOPBITS;
1619 break;
1620 default:
1621 RETURN_ERROR(SP_ERR_ARG, "Invalid stop bit setting");
1622 }
1623 }
1624
1625 if (config->rts >= 0) {
1626 switch (config->rts) {
1627 case SP_RTS_OFF:
1628 data->dcb.fRtsControl = RTS_CONTROL_DISABLE;
1629 break;
1630 case SP_RTS_ON:
1631 data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
1632 break;
1633 case SP_RTS_FLOW_CONTROL:
1634 data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
1635 break;
1636 default:
1637 RETURN_ERROR(SP_ERR_ARG, "Invalid RTS setting");
1638 }
1639 }
1640
1641 if (config->cts >= 0) {
1642 switch (config->cts) {
1643 case SP_CTS_IGNORE:
1644 data->dcb.fOutxCtsFlow = FALSE;
1645 break;
1646 case SP_CTS_FLOW_CONTROL:
1647 data->dcb.fOutxCtsFlow = TRUE;
1648 break;
1649 default:
1650 RETURN_ERROR(SP_ERR_ARG, "Invalid CTS setting");
1651 }
1652 }
1653
1654 if (config->dtr >= 0) {
1655 switch (config->dtr) {
1656 case SP_DTR_OFF:
1657 data->dcb.fDtrControl = DTR_CONTROL_DISABLE;
1658 break;
1659 case SP_DTR_ON:
1660 data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
1661 break;
1662 case SP_DTR_FLOW_CONTROL:
1663 data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
1664 break;
1665 default:
1666 RETURN_ERROR(SP_ERR_ARG, "Invalid DTR setting");
1667 }
1668 }
1669
1670 if (config->dsr >= 0) {
1671 switch (config->dsr) {
1672 case SP_DSR_IGNORE:
1673 data->dcb.fOutxDsrFlow = FALSE;
1674 break;
1675 case SP_DSR_FLOW_CONTROL:
1676 data->dcb.fOutxDsrFlow = TRUE;
1677 break;
1678 default:
1679 RETURN_ERROR(SP_ERR_ARG, "Invalid DSR setting");
1680 }
1681 }
1682
1683 if (config->xon_xoff >= 0) {
1684 switch (config->xon_xoff) {
1685 case SP_XONXOFF_DISABLED:
1686 data->dcb.fInX = FALSE;
1687 data->dcb.fOutX = FALSE;
1688 break;
1689 case SP_XONXOFF_IN:
1690 data->dcb.fInX = TRUE;
1691 data->dcb.fOutX = FALSE;
1692 break;
1693 case SP_XONXOFF_OUT:
1694 data->dcb.fInX = FALSE;
1695 data->dcb.fOutX = TRUE;
1696 break;
1697 case SP_XONXOFF_INOUT:
1698 data->dcb.fInX = TRUE;
1699 data->dcb.fOutX = TRUE;
1700 break;
1701 default:
1702 RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
1703 }
1704 }
1705
1706 if (!SetCommState(port->hdl, &data->dcb))
1707 RETURN_FAIL("SetCommState() failed");
1708
1709#else /* !_WIN32 */
1710
1711 int controlbits;
1712
1713 if (config->baudrate >= 0) {
1714 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1715 if (config->baudrate == std_baudrates[i].value) {
1716 if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
1717 RETURN_FAIL("cfsetospeed() failed");
1718
1719 if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
1720 RETURN_FAIL("cfsetispeed() failed");
1721 break;
1722 }
1723 }
1724
1725 /* Non-standard baud rate */
1726 if (i == NUM_STD_BAUDRATES) {
1727#ifdef __APPLE__
1728 /* Set "dummy" baud rate. */
1729 if (cfsetspeed(&data->term, B9600) < 0)
1730 RETURN_FAIL("cfsetspeed() failed");
1731 baud_nonstd = config->baudrate;
1732#elif defined(__linux__)
1733 baud_nonstd = 1;
1734#else
1735 RETURN_ERROR(SP_ERR_SUPP, "Non-standard baudrate not supported");
1736#endif
1737 }
1738 }
1739
1740 if (config->bits >= 0) {
1741 data->term.c_cflag &= ~CSIZE;
1742 switch (config->bits) {
1743 case 8:
1744 data->term.c_cflag |= CS8;
1745 break;
1746 case 7:
1747 data->term.c_cflag |= CS7;
1748 break;
1749 case 6:
1750 data->term.c_cflag |= CS6;
1751 break;
1752 case 5:
1753 data->term.c_cflag |= CS5;
1754 break;
1755 default:
1756 RETURN_ERROR(SP_ERR_ARG, "Invalid data bits setting");
1757 }
1758 }
1759
1760 if (config->parity >= 0) {
1761 data->term.c_iflag &= ~IGNPAR;
1762 data->term.c_cflag &= ~(PARENB | PARODD);
1763#ifdef CMSPAR
1764 data->term.c_cflag &= ~CMSPAR;
1765#endif
1766 switch (config->parity) {
1767 case SP_PARITY_NONE:
1768 data->term.c_iflag |= IGNPAR;
1769 break;
1770 case SP_PARITY_EVEN:
1771 data->term.c_cflag |= PARENB;
1772 break;
1773 case SP_PARITY_ODD:
1774 data->term.c_cflag |= PARENB | PARODD;
1775 break;
1776#ifdef CMSPAR
1777 case SP_PARITY_MARK:
1778 data->term.c_cflag |= PARENB | PARODD;
1779 data->term.c_cflag |= CMSPAR;
1780 break;
1781 case SP_PARITY_SPACE:
1782 data->term.c_cflag |= PARENB;
1783 data->term.c_cflag |= CMSPAR;
1784 break;
1785#else
1786 case SP_PARITY_MARK:
1787 case SP_PARITY_SPACE:
1788 RETURN_ERROR(SP_ERR_SUPP, "Mark/space parity not supported");
1789#endif
1790 default:
1791 RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
1792 }
1793 }
1794
1795 if (config->stopbits >= 0) {
1796 data->term.c_cflag &= ~CSTOPB;
1797 switch (config->stopbits) {
1798 case 1:
1799 data->term.c_cflag &= ~CSTOPB;
1800 break;
1801 case 2:
1802 data->term.c_cflag |= CSTOPB;
1803 break;
1804 default:
1805 RETURN_ERROR(SP_ERR_ARG, "Invalid stop bits setting");
1806 }
1807 }
1808
1809 if (config->rts >= 0 || config->cts >= 0) {
1810 if (data->termiox_supported) {
1811 data->flow &= ~(RTS_FLOW | CTS_FLOW);
1812 switch (config->rts) {
1813 case SP_RTS_OFF:
1814 case SP_RTS_ON:
1815 controlbits = TIOCM_RTS;
1816 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
1817 RETURN_FAIL("Setting RTS signal level failed");
1818 break;
1819 case SP_RTS_FLOW_CONTROL:
1820 data->flow |= RTS_FLOW;
1821 break;
1822 default:
1823 break;
1824 }
1825 if (config->cts == SP_CTS_FLOW_CONTROL)
1826 data->flow |= CTS_FLOW;
1827
1828 if (data->flow & (RTS_FLOW | CTS_FLOW))
1829 data->term.c_iflag |= CRTSCTS;
1830 else
1831 data->term.c_iflag &= ~CRTSCTS;
1832 } else {
1833 /* Asymmetric use of RTS/CTS not supported. */
1834 if (data->term.c_iflag & CRTSCTS) {
1835 /* Flow control can only be disabled for both RTS & CTS together. */
1836 if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
1837 if (config->cts != SP_CTS_IGNORE)
1838 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
1839 }
1840 if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
1841 if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
1842 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
1843 }
1844 } else {
1845 /* Flow control can only be enabled for both RTS & CTS together. */
1846 if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
1847 ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
1848 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be enabled together");
1849 }
1850
1851 if (config->rts >= 0) {
1852 if (config->rts == SP_RTS_FLOW_CONTROL) {
1853 data->term.c_iflag |= CRTSCTS;
1854 } else {
1855 controlbits = TIOCM_RTS;
1856 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
1857 &controlbits) < 0)
1858 RETURN_FAIL("Setting RTS signal level failed");
1859 }
1860 }
1861 }
1862 }
1863
1864 if (config->dtr >= 0 || config->dsr >= 0) {
1865 if (data->termiox_supported) {
1866 data->flow &= ~(DTR_FLOW | DSR_FLOW);
1867 switch (config->dtr) {
1868 case SP_DTR_OFF:
1869 case SP_DTR_ON:
1870 controlbits = TIOCM_DTR;
1871 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
1872 RETURN_FAIL("Setting DTR signal level failed");
1873 break;
1874 case SP_DTR_FLOW_CONTROL:
1875 data->flow |= DTR_FLOW;
1876 break;
1877 default:
1878 break;
1879 }
1880 if (config->dsr == SP_DSR_FLOW_CONTROL)
1881 data->flow |= DSR_FLOW;
1882 } else {
1883 /* DTR/DSR flow control not supported. */
1884 if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
1885 RETURN_ERROR(SP_ERR_SUPP, "DTR/DSR flow control not supported");
1886
1887 if (config->dtr >= 0) {
1888 controlbits = TIOCM_DTR;
1889 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
1890 &controlbits) < 0)
1891 RETURN_FAIL("Setting DTR signal level failed");
1892 }
1893 }
1894 }
1895
1896 if (config->xon_xoff >= 0) {
1897 data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
1898 switch (config->xon_xoff) {
1899 case SP_XONXOFF_DISABLED:
1900 break;
1901 case SP_XONXOFF_IN:
1902 data->term.c_iflag |= IXOFF;
1903 break;
1904 case SP_XONXOFF_OUT:
1905 data->term.c_iflag |= IXON | IXANY;
1906 break;
1907 case SP_XONXOFF_INOUT:
1908 data->term.c_iflag |= IXON | IXOFF | IXANY;
1909 break;
1910 default:
1911 RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
1912 }
1913 }
1914
1915 if (tcsetattr(port->fd, TCSANOW, &data->term) < 0)
1916 RETURN_FAIL("tcsetattr() failed");
1917
1918#ifdef __APPLE__
1919 if (baud_nonstd != B0) {
1920 if (ioctl(port->fd, IOSSIOSPEED, &baud_nonstd) == -1)
1921 RETURN_FAIL("IOSSIOSPEED ioctl failed");
1922 /* Set baud rates in data->term to correct, but incompatible
1923 * with tcsetattr() value, same as delivered by tcgetattr(). */
1924 if (cfsetspeed(&data->term, baud_nonstd) < 0)
1925 RETURN_FAIL("cfsetspeed() failed");
1926 }
1927#elif defined(__linux__)
1928 if (baud_nonstd)
1929 TRY(set_baudrate(port->fd, config->baudrate));
1930#ifdef USE_TERMIOX
1931 if (data->termiox_supported)
1932 TRY(set_flow(port->fd, data->flow));
1933#endif
1934#endif
1935
1936#endif /* !_WIN32 */
1937
1938 RETURN_OK();
1939}
1940
1941enum sp_return sp_new_config(struct sp_port_config **config_ptr)
1942{
1943 struct sp_port_config *config;
1944
1945 TRACE("%p", config_ptr);
1946
1947 if (!config_ptr)
1948 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
1949
1950 *config_ptr = NULL;
1951
1952 if (!(config = malloc(sizeof(struct sp_port_config))))
1953 RETURN_ERROR(SP_ERR_MEM, "config malloc failed");
1954
1955 config->baudrate = -1;
1956 config->bits = -1;
1957 config->parity = -1;
1958 config->stopbits = -1;
1959 config->rts = -1;
1960 config->cts = -1;
1961 config->dtr = -1;
1962 config->dsr = -1;
1963
1964 *config_ptr = config;
1965
1966 RETURN_OK();
1967}
1968
1969void sp_free_config(struct sp_port_config *config)
1970{
1971 TRACE("%p", config);
1972
1973 if (!config)
1974 DEBUG("Null config");
1975 else
1976 free(config);
1977
1978 RETURN();
1979}
1980
1981enum sp_return sp_get_config(struct sp_port *port, struct sp_port_config *config)
1982{
1983 struct port_data data;
1984
1985 TRACE("%p, %p", port, config);
1986
1987 CHECK_OPEN_PORT();
1988
1989 if (!config)
1990 RETURN_ERROR(SP_ERR_ARG, "Null config");
1991
1992 TRY(get_config(port, &data, config));
1993
1994 RETURN_OK();
1995}
1996
1997enum sp_return sp_set_config(struct sp_port *port, const struct sp_port_config *config)
1998{
1999 struct port_data data;
2000 struct sp_port_config prev_config;
2001
2002 TRACE("%p, %p", port, config);
2003
2004 CHECK_OPEN_PORT();
2005
2006 if (!config)
2007 RETURN_ERROR(SP_ERR_ARG, "Null config");
2008
2009 TRY(get_config(port, &data, &prev_config));
2010 TRY(set_config(port, &data, config));
2011
2012 RETURN_OK();
2013}
2014
2015#define CREATE_ACCESSORS(x, type) \
2016enum sp_return sp_set_##x(struct sp_port *port, type x) { \
2017 struct port_data data; \
2018 struct sp_port_config config; \
2019 TRACE("%p, %d", port, x); \
2020 CHECK_OPEN_PORT(); \
2021 TRY(get_config(port, &data, &config)); \
2022 config.x = x; \
2023 TRY(set_config(port, &data, &config)); \
2024 RETURN_OK(); \
2025} \
2026enum sp_return sp_get_config_##x(const struct sp_port_config *config, type *x) { \
2027 TRACE("%p, %p", config, x); \
2028 if (!config) \
2029 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
2030 *x = config->x; \
2031 RETURN_OK(); \
2032} \
2033enum sp_return sp_set_config_##x(struct sp_port_config *config, type x) { \
2034 TRACE("%p, %d", config, x); \
2035 if (!config) \
2036 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
2037 config->x = x; \
2038 RETURN_OK(); \
2039}
2040
2041CREATE_ACCESSORS(baudrate, int)
2042CREATE_ACCESSORS(bits, int)
2043CREATE_ACCESSORS(parity, enum sp_parity)
2044CREATE_ACCESSORS(stopbits, int)
2045CREATE_ACCESSORS(rts, enum sp_rts)
2046CREATE_ACCESSORS(cts, enum sp_cts)
2047CREATE_ACCESSORS(dtr, enum sp_dtr)
2048CREATE_ACCESSORS(dsr, enum sp_dsr)
2049CREATE_ACCESSORS(xon_xoff, enum sp_xonxoff)
2050
2051enum sp_return sp_set_config_flowcontrol(struct sp_port_config *config, enum sp_flowcontrol flowcontrol)
2052{
2053 if (!config)
2054 RETURN_ERROR(SP_ERR_ARG, "Null configuration");
2055
2056 if (flowcontrol > SP_FLOWCONTROL_DTRDSR)
2057 RETURN_ERROR(SP_ERR_ARG, "Invalid flow control setting");
2058
2059 if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
2060 config->xon_xoff = SP_XONXOFF_INOUT;
2061 else
2062 config->xon_xoff = SP_XONXOFF_DISABLED;
2063
2064 if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
2065 config->rts = SP_RTS_FLOW_CONTROL;
2066 config->cts = SP_CTS_FLOW_CONTROL;
2067 } else {
2068 if (config->rts == SP_RTS_FLOW_CONTROL)
2069 config->rts = SP_RTS_ON;
2070 config->cts = SP_CTS_IGNORE;
2071 }
2072
2073 if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
2074 config->dtr = SP_DTR_FLOW_CONTROL;
2075 config->dsr = SP_DSR_FLOW_CONTROL;
2076 } else {
2077 if (config->dtr == SP_DTR_FLOW_CONTROL)
2078 config->dtr = SP_DTR_ON;
2079 config->dsr = SP_DSR_IGNORE;
2080 }
2081
2082 RETURN_OK();
2083}
2084
2085enum sp_return sp_set_flowcontrol(struct sp_port *port, enum sp_flowcontrol flowcontrol)
2086{
2087 struct port_data data;
2088 struct sp_port_config config;
2089
2090 TRACE("%p, %d", port, flowcontrol);
2091
2092 CHECK_OPEN_PORT();
2093
2094 TRY(get_config(port, &data, &config));
2095
2096 TRY(sp_set_config_flowcontrol(&config, flowcontrol));
2097
2098 TRY(set_config(port, &data, &config));
2099
2100 RETURN_OK();
2101}
2102
2103enum sp_return sp_get_signals(struct sp_port *port, enum sp_signal *signals)
2104{
2105 TRACE("%p, %p", port, signals);
2106
2107 CHECK_OPEN_PORT();
2108
2109 if (!signals)
2110 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
2111
2112 DEBUG("Getting control signals for port %s", port->name);
2113
2114 *signals = 0;
2115#ifdef _WIN32
2116 DWORD bits;
2117 if (GetCommModemStatus(port->hdl, &bits) == 0)
2118 RETURN_FAIL("GetCommModemStatus() failed");
2119 if (bits & MS_CTS_ON)
2120 *signals |= SP_SIG_CTS;
2121 if (bits & MS_DSR_ON)
2122 *signals |= SP_SIG_DSR;
2123 if (bits & MS_RLSD_ON)
2124 *signals |= SP_SIG_DCD;
2125 if (bits & MS_RING_ON)
2126 *signals |= SP_SIG_RI;
2127#else
2128 int bits;
2129 if (ioctl(port->fd, TIOCMGET, &bits) < 0)
2130 RETURN_FAIL("TIOCMGET ioctl failed");
2131 if (bits & TIOCM_CTS)
2132 *signals |= SP_SIG_CTS;
2133 if (bits & TIOCM_DSR)
2134 *signals |= SP_SIG_DSR;
2135 if (bits & TIOCM_CAR)
2136 *signals |= SP_SIG_DCD;
2137 if (bits & TIOCM_RNG)
2138 *signals |= SP_SIG_RI;
2139#endif
2140 RETURN_OK();
2141}
2142
2143enum sp_return sp_start_break(struct sp_port *port)
2144{
2145 TRACE("%p", port);
2146
2147 CHECK_OPEN_PORT();
2148#ifdef _WIN32
2149 if (SetCommBreak(port->hdl) == 0)
2150 RETURN_FAIL("SetCommBreak() failed");
2151#else
2152 if (ioctl(port->fd, TIOCSBRK, 1) < 0)
2153 RETURN_FAIL("TIOCSBRK ioctl failed");
2154#endif
2155
2156 RETURN_OK();
2157}
2158
2159enum sp_return sp_end_break(struct sp_port *port)
2160{
2161 TRACE("%p", port);
2162
2163 CHECK_OPEN_PORT();
2164#ifdef _WIN32
2165 if (ClearCommBreak(port->hdl) == 0)
2166 RETURN_FAIL("ClearCommBreak() failed");
2167#else
2168 if (ioctl(port->fd, TIOCCBRK, 1) < 0)
2169 RETURN_FAIL("TIOCCBRK ioctl failed");
2170#endif
2171
2172 RETURN_OK();
2173}
2174
2175int sp_last_error_code(void)
2176{
2177 TRACE("");
2178#ifdef _WIN32
2179 RETURN_VALUE("%d", GetLastError());
2180#else
2181 RETURN_VALUE("%d", errno);
2182#endif
2183}
2184
2185char *sp_last_error_message(void)
2186{
2187 TRACE("");
2188
2189#ifdef _WIN32
2190 LPVOID message;
2191 DWORD error = GetLastError();
2192
2193 FormatMessage(
2194 FORMAT_MESSAGE_ALLOCATE_BUFFER |
2195 FORMAT_MESSAGE_FROM_SYSTEM |
2196 FORMAT_MESSAGE_IGNORE_INSERTS,
2197 NULL,
2198 error,
2199 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
2200 (LPTSTR) &message,
2201 0, NULL );
2202
2203 RETURN_VALUE("%s", message);
2204#else
2205 RETURN_VALUE("%s", strerror(errno));
2206#endif
2207}
2208
2209void sp_free_error_message(char *message)
2210{
2211 TRACE("%s", message);
2212
2213#ifdef _WIN32
2214 LocalFree(message);
2215#else
2216 (void)message;
2217#endif
2218
2219 RETURN();
2220}
2221
2222void sp_set_debug_handler(void (*handler)(const char *format, ...))
2223{
2224 TRACE("%p", handler);
2225
2226 sp_debug_handler = handler;
2227
2228 RETURN();
2229}
2230
2231void sp_default_debug_handler(const char *format, ...)
2232{
2233 va_list args;
2234 va_start(args, format);
2235 if (getenv("LIBSERIALPORT_DEBUG")) {
2236 fputs("sp: ", stderr);
2237 vfprintf(stderr, format, args);
2238 }
2239 va_end(args);
2240}
Serial port access library