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Handle EINTR by repeating the call.
[libserialport.git] / serialport.c
CommitLineData
74510d4b
ML		 1/*
2 * This file is part of the libserialport project.
3 *
4 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
5 * Copyright (C) 2010-2012 Uwe Hermann <uwe@hermann-uwe.de>
6 * Copyright (C) 2013 Martin Ling <martin-libserialport@earth.li>
31b3a8f5 7 * Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz>
74510d4b
ML		 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>
3b63f34d
ML		 28#include <stdlib.h>
29#include <errno.h>
863b35e6
ML		 30#include <stdio.h>
31#include <stdarg.h>
74510d4b
ML		 32#ifdef _WIN32
33#include <windows.h>
3b63f34d 34#include <tchar.h>
767c5ba8 35#include <stdio.h>
74510d4b 36#else
8fbf876d 37#include <limits.h>
74510d4b
ML		 38#include <termios.h>
39#include <sys/ioctl.h>
e3dcf906
ML		 40#include <sys/time.h>
41#include <limits.h>
74510d4b 42#endif
3b63f34d 43#ifdef __APPLE__
1ebf4347
ML		 44#include <IOKit/IOKitLib.h>
45#include <IOKit/serial/IOSerialKeys.h>
31b3a8f5 46#include <IOKit/serial/ioss.h>
1ebf4347 47#include <sys/syslimits.h>
3b63f34d
ML		 48#endif
49#ifdef __linux__
50#include "libudev.h"
4b97c9fc 51#include "linux/serial.h"
7a6d2196 52#include "linux_termios.h"
40978c2b 53#if defined(TCGETX) && defined(TCSETX) && defined(HAVE_TERMIOX)
68ec29db 54#define USE_TERMIOX
40978c2b 55#endif
3b63f34d 56#endif
74510d4b 57
71c8a9b9
UH		 58#ifndef _WIN32
59#include "linux_termios.h"
60#endif
61
f6a1fb65 62#include "libserialport.h"
74510d4b 63
1c5aae9d
ML		 64struct sp_port {
65 char *name;
66#ifdef _WIN32
67 HANDLE hdl;
e3dcf906 68 COMMTIMEOUTS timeouts;
a3cb91f5 69 OVERLAPPED write_ovl;
e3dcf906 70 OVERLAPPED read_ovl;
0765af56 71 BYTE pending_byte;
a3cb91f5 72 BOOL writing;
1c5aae9d
ML		 73#else
74 int fd;
75#endif
76};
77
9b1502ef
ML		 78struct sp_port_config {
79 int baudrate;
80 int bits;
81 enum sp_parity parity;
82 int stopbits;
83 enum sp_rts rts;
84 enum sp_cts cts;
85 enum sp_dtr dtr;
86 enum sp_dsr dsr;
87 enum sp_xonxoff xon_xoff;
88};
89
8f189c4c 90struct port_data {
8094e4a0
ML		 91#ifdef _WIN32
92 DCB dcb;
93#else
94 struct termios term;
824dcb45 95 int controlbits;
68ec29db 96 int termiox_supported;
40978c2b
ML		 97 int flow;
98#endif
8094e4a0
ML		 99};
100
da2748bf
ML		 101/* Standard baud rates. */
102#ifdef _WIN32
103#define BAUD_TYPE DWORD
104#define BAUD(n) {CBR_##n, n}
105#else
106#define BAUD_TYPE speed_t
107#define BAUD(n) {B##n, n}
108#endif
109
110struct std_baudrate {
111 BAUD_TYPE index;
112 int value;
113};
114
115const struct std_baudrate std_baudrates[] = {
116#ifdef _WIN32
117 /*
118 * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
119 * have documented CBR_* macros.
120 */
121 BAUD(110), BAUD(300), BAUD(600), BAUD(1200), BAUD(2400), BAUD(4800),
122 BAUD(9600), BAUD(14400), BAUD(19200), BAUD(38400), BAUD(57600),
eac329d2 123 BAUD(115200), BAUD(128000), BAUD(256000),
da2748bf 124#else
eac329d2
UH		 125 BAUD(50), BAUD(75), BAUD(110), BAUD(134), BAUD(150), BAUD(200),
126 BAUD(300), BAUD(600), BAUD(1200), BAUD(1800), BAUD(2400), BAUD(4800),
127 BAUD(9600), BAUD(19200), BAUD(38400), BAUD(57600), BAUD(115200),
128 BAUD(230400),
da2748bf 129#if !defined(__APPLE__) && !defined(__OpenBSD__)
eac329d2 130 BAUD(460800),
da2748bf
ML		 131#endif
132#endif
133};
134
863b35e6
ML		 135void (*sp_debug_handler)(const char *format, ...) = sp_default_debug_handler;
136
da2748bf
ML		 137#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
138#define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)
139
92f756f8
ML		 140/* Debug output macros. */
141#define DEBUG(fmt, ...) do { if (sp_debug_handler) sp_debug_handler(fmt ".\n", ##__VA_ARGS__); } while (0)
142#define DEBUG_ERROR(err, msg) DEBUG("%s returning " #err ": " msg, __func__)
143#define DEBUG_FAIL(msg) do { \
144 char *errmsg = sp_last_error_message(); \
145 DEBUG("%s returning SP_ERR_FAIL: " msg ": %s", __func__, errmsg); \
146 sp_free_error_message(errmsg); \
147} while (0);
148#define RETURN() do { DEBUG("%s returning", __func__); return; } while(0)
149#define RETURN_CODE(x) do { DEBUG("%s returning " #x, __func__); return x; } while (0)
150#define RETURN_CODEVAL(x) do { \
151 switch (x) { \
152 case SP_OK: RETURN_CODE(SP_OK); \
153 case SP_ERR_ARG: RETURN_CODE(SP_ERR_ARG); \
154 case SP_ERR_FAIL: RETURN_CODE(SP_ERR_FAIL); \
155 case SP_ERR_MEM: RETURN_CODE(SP_ERR_MEM); \
156 case SP_ERR_SUPP: RETURN_CODE(SP_ERR_SUPP); \
157 } \
158} while (0)
159#define RETURN_OK() RETURN_CODE(SP_OK);
160#define RETURN_ERROR(err, msg) do { DEBUG_ERROR(err, msg); return err; } while (0)
161#define RETURN_FAIL(msg) do { DEBUG_FAIL(msg); return SP_ERR_FAIL; } while (0)
162#define RETURN_VALUE(fmt, x) do { DEBUG("%s returning " fmt, __func__, x); return x; } while (0)
163#define SET_ERROR(val, err, msg) do { DEBUG_ERROR(err, msg); val = err; } while (0)
aac4d7f2 164#define SET_FAIL(val, msg) do { DEBUG_FAIL(msg); val = SP_ERR_FAIL; } while (0)
92f756f8
ML		 165#define TRACE(fmt, ...) DEBUG("%s(" fmt ") called", __func__, ##__VA_ARGS__)
166
64690702
ML		 167#define TRY(x) do { int ret = x; if (ret != SP_OK) RETURN_CODEVAL(ret); } while (0)
168
348e23cc 169/* Helper functions. */
348e23cc 170static struct sp_port **list_append(struct sp_port **list, const char *portname);
eb6ed20f
ML		 171static enum sp_return get_config(struct sp_port *port, struct port_data *data,
172 struct sp_port_config *config);
173static enum sp_return set_config(struct sp_port *port, struct port_data *data,
174 const struct sp_port_config *config);
80186526 175
eb6ed20f 176enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
d54e9004
ML		 177{
178 struct sp_port *port;
5919c913 179 int len;
d54e9004 180
c33efc48
ML		 181 TRACE("%s, %p", portname, port_ptr);
182
32b5ac05 183 if (!port_ptr)
c33efc48 184 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
32b5ac05 185
77f262c4
ML		 186 *port_ptr = NULL;
187
d4babed2 188 if (!portname)
c33efc48 189 RETURN_ERROR(SP_ERR_ARG, "Null port name");
d4babed2 190
ea667be7
ML		 191 DEBUG("Building structure for port %s", portname);
192
d54e9004 193 if (!(port = malloc(sizeof(struct sp_port))))
c33efc48 194 RETURN_ERROR(SP_ERR_MEM, "Port structure malloc failed");
d54e9004 195
5919c913
ML		 196 len = strlen(portname) + 1;
197
eac329d2 198 if (!(port->name = malloc(len))) {
d54e9004 199 free(port);
c33efc48 200 RETURN_ERROR(SP_ERR_MEM, "Port name malloc failed");
d54e9004
ML		 201 }
202
203 memcpy(port->name, portname, len);
204
8f471c66
ML		 205#ifdef _WIN32
206 port->hdl = INVALID_HANDLE_VALUE;
207#else
208 port->fd = -1;
209#endif
210
77f262c4
ML		 211 *port_ptr = port;
212
c33efc48 213 RETURN_OK();
d54e9004
ML		 214}
215
1c5aae9d
ML		 216char *sp_get_port_name(const struct sp_port *port)
217{
218 TRACE("%p", port);
219
220 if (!port)
221 return NULL;
222
223 RETURN_VALUE("%s", port->name);
224}
225
3c126654
ML		 226enum sp_return sp_get_port_handle(const struct sp_port *port, void *result_ptr)
227{
00d8c56d 228 TRACE("%p, %p", port, result_ptr);
3c126654
ML		 229
230 if (!port)
231 RETURN_ERROR(SP_ERR_ARG, "Null port");
232
233#ifdef _WIN32
234 HANDLE *handle_ptr = result_ptr;
235 *handle_ptr = port->hdl;
236#else
237 int *fd_ptr = result_ptr;
238 *fd_ptr = port->fd;
239#endif
240
241 RETURN_OK();
242}
243
eb6ed20f 244enum sp_return sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr)
32b5ac05 245{
c33efc48
ML		 246 TRACE("%p, %p", port, copy_ptr);
247
32b5ac05 248 if (!copy_ptr)
c33efc48 249 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
32b5ac05
ML		 250
251 *copy_ptr = NULL;
252
c33efc48
ML		 253 if (!port)
254 RETURN_ERROR(SP_ERR_ARG, "Null port");
255
256 if (!port->name)
257 RETURN_ERROR(SP_ERR_ARG, "Null port name");
32b5ac05 258
ea667be7
ML		 259 DEBUG("Copying port structure");
260
c33efc48 261 RETURN_VALUE("%p", sp_get_port_by_name(port->name, copy_ptr));
32b5ac05
ML		 262}
263
e3b2f7a4
ML		 264void sp_free_port(struct sp_port *port)
265{
c33efc48
ML		 266 TRACE("%p", port);
267
00d8c56d 268 if (!port) {
c33efc48
ML		 269 DEBUG("Null port");
270 RETURN();
271 }
e3b2f7a4 272
ea667be7
ML		 273 DEBUG("Freeing port structure");
274
e3b2f7a4
ML		 275 if (port->name)
276 free(port->name);
277
278 free(port);
c33efc48
ML		 279
280 RETURN();
e3b2f7a4
ML		 281}
282
348e23cc 283static struct sp_port **list_append(struct sp_port **list, const char *portname)
3b63f34d
ML		 284{
285 void *tmp;
286 unsigned int count;
f92f1f0c 287
3b63f34d 288 for (count = 0; list[count]; count++);
d54e9004 289 if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
3b63f34d
ML		 290 goto fail;
291 list = tmp;
77f262c4 292 if (sp_get_port_by_name(portname, &list[count]) != SP_OK)
3b63f34d 293 goto fail;
db2794ce 294 list[count + 1] = NULL;
3b63f34d 295 return list;
f92f1f0c 296
3b63f34d
ML		 297fail:
298 sp_free_port_list(list);
299 return NULL;
300}
301
eb6ed20f 302enum sp_return sp_list_ports(struct sp_port ***list_ptr)
3b63f34d 303{
d54e9004 304 struct sp_port **list;
6b93ede4 305 int ret = SP_ERR_SUPP;
24c1a4bb 306
c33efc48
ML		 307 TRACE("%p", list_ptr);
308
dec10e31
ML		 309 if (!list_ptr)
310 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
311
ea667be7
ML		 312 DEBUG("Enumerating ports");
313
d54e9004 314 if (!(list = malloc(sizeof(struct sp_port **))))
c33efc48 315 RETURN_ERROR(SP_ERR_MEM, "Port list malloc failed");
24c1a4bb
ML		 316
317 list[0] = NULL;
3b63f34d
ML		 318
319#ifdef _WIN32
320 HKEY key;
bdfb5b8c
ML		 321 TCHAR *value, *data;
322 DWORD max_value_len, max_data_size, max_data_len;
323 DWORD value_len, data_size, data_len;
3b63f34d 324 DWORD type, index = 0;
8b532d9c
ML		 325 char *name;
326 int name_len;
3b63f34d 327
6b93ede4
ML		 328 ret = SP_OK;
329
ea667be7 330 DEBUG("Opening registry key");
3b63f34d 331 if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
eac329d2 332 0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS) {
c33efc48 333 SET_FAIL(ret, "RegOpenKeyEx() failed");
77f262c4
ML		 334 goto out_done;
335 }
ea667be7 336 DEBUG("Querying registry key value and data sizes");
3b63f34d 337 if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
eac329d2 338 &max_value_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS) {
c33efc48 339 SET_FAIL(ret, "RegQueryInfoKey() failed");
3b63f34d 340 goto out_close;
77f262c4 341 }
3b63f34d 342 max_data_len = max_data_size / sizeof(TCHAR);
eac329d2 343 if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) {
c33efc48 344 SET_ERROR(ret, SP_ERR_MEM, "registry value malloc failed");
3b63f34d 345 goto out_close;
77f262c4 346 }
eac329d2 347 if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) {
c33efc48 348 SET_ERROR(ret, SP_ERR_MEM, "registry data malloc failed");
bdfb5b8c 349 goto out_free_value;
77f262c4 350 }
ea667be7 351 DEBUG("Iterating over values");
3b63f34d 352 while (
d9573bad 353 value_len = max_value_len + 1,
3b63f34d 354 data_size = max_data_size,
bdfb5b8c 355 RegEnumValue(key, index, value, &value_len,
3b63f34d
ML		 356 NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS)
357 {
358 data_len = data_size / sizeof(TCHAR);
359 data[data_len] = '\0';
8b532d9c
ML		 360#ifdef UNICODE
361 name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL)
362#else
363 name_len = data_len + 1;
364#endif
eac329d2 365 if (!(name = malloc(name_len))) {
c33efc48 366 SET_ERROR(ret, SP_ERR_MEM, "registry port name malloc failed");
8b532d9c 367 goto out;
77f262c4 368 }
8b532d9c
ML		 369#ifdef UNICODE
370 WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL);
371#else
372 strcpy(name, data);
373#endif
c33efc48
ML		 374 if (type == REG_SZ) {
375 DEBUG("Found port %s", name);
376 if (!(list = list_append(list, name))) {
377 SET_ERROR(ret, SP_ERR_MEM, "list append failed");
378 goto out;
379 }
77f262c4 380 }
3b63f34d
ML		 381 index++;
382 }
383out:
384 free(data);
bdfb5b8c
ML		 385out_free_value:
386 free(value);
3b63f34d
ML		 387out_close:
388 RegCloseKey(key);
77f262c4 389out_done:
3b63f34d
ML		 390#endif
391#ifdef __APPLE__
392 mach_port_t master;
393 CFMutableDictionaryRef classes;
394 io_iterator_t iter;
395 char *path;
396 io_object_t port;
397 CFTypeRef cf_path;
398 Boolean result;
399
6b93ede4
ML		 400 ret = SP_OK;
401
ea667be7 402 DEBUG("Getting IOKit master port");
eac329d2 403 if (IOMasterPort(MACH_PORT_NULL, &master) != KERN_SUCCESS) {
c33efc48 404 SET_FAIL(ret, "IOMasterPort() failed");
77f262c4
ML		 405 goto out_done;
406 }
3b63f34d 407
ea667be7 408 DEBUG("Creating matching dictionary");
eac329d2 409 if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue))) {
c33efc48 410 SET_FAIL(ret, "IOServiceMatching() failed");
77f262c4
ML		 411 goto out_done;
412 }
3b63f34d
ML		 413
414 CFDictionarySetValue(classes,
415 CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDAllTypes));
416
ea667be7 417 DEBUG("Getting matching services");
eac329d2 418 if (IOServiceGetMatchingServices(master, classes, &iter) != KERN_SUCCESS) {
c33efc48 419 SET_FAIL(ret, "IOServiceGetMatchingServices() failed");
77f262c4
ML		 420 goto out_done;
421 }
3b63f34d 422
eac329d2 423 if (!(path = malloc(PATH_MAX))) {
c33efc48 424 SET_ERROR(ret, SP_ERR_MEM, "device path malloc failed");
3b63f34d 425 goto out_release;
77f262c4 426 }
3b63f34d 427
ea667be7 428 DEBUG("Iterating over results");
1ebf4347 429 while ((port = IOIteratorNext(iter))) {
3b63f34d
ML		 430 cf_path = IORegistryEntryCreateCFProperty(port,
431 CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0);
432 if (cf_path) {
433 result = CFStringGetCString(cf_path,
434 path, PATH_MAX, kCFStringEncodingASCII);
435 CFRelease(cf_path);
c33efc48
ML		 436 if (result) {
437 DEBUG("Found port %s", path);
438 if (!(list = list_append(list, path))) {
439 SET_ERROR(ret, SP_ERR_MEM, "list append failed");
440 IOObjectRelease(port);
441 goto out;
442 }
77f262c4 443 }
3b63f34d
ML		 444 }
445 IOObjectRelease(port);
446 }
3b63f34d
ML		 447out:
448 free(path);
449out_release:
450 IOObjectRelease(iter);
77f262c4 451out_done:
3b63f34d
ML		 452#endif
453#ifdef __linux__
454 struct udev *ud;
455 struct udev_enumerate *ud_enumerate;
456 struct udev_list_entry *ud_list;
457 struct udev_list_entry *ud_entry;
458 const char *path;
08fe0bdb 459 struct udev_device *ud_dev, *ud_parent;
3b63f34d 460 const char *name;
4b97c9fc
ML		 461 const char *driver;
462 int fd, ioctl_result;
463 struct serial_struct serial_info;
3b63f34d 464
6b93ede4
ML		 465 ret = SP_OK;
466
ea667be7 467 DEBUG("Enumerating tty devices");
3b63f34d
ML		 468 ud = udev_new();
469 ud_enumerate = udev_enumerate_new(ud);
470 udev_enumerate_add_match_subsystem(ud_enumerate, "tty");
471 udev_enumerate_scan_devices(ud_enumerate);
472 ud_list = udev_enumerate_get_list_entry(ud_enumerate);
ea667be7 473 DEBUG("Iterating over results");
eac329d2 474 udev_list_entry_foreach(ud_entry, ud_list) {
3b63f34d 475 path = udev_list_entry_get_name(ud_entry);
ea667be7 476 DEBUG("Found device %s", path);
3b63f34d 477 ud_dev = udev_device_new_from_syspath(ud, path);
08fe0bdb
ML		 478 /* If there is no parent device, this is a virtual tty. */
479 ud_parent = udev_device_get_parent(ud_dev);
eac329d2 480 if (ud_parent == NULL) {
ea667be7 481 DEBUG("No parent device, assuming virtual tty");
08fe0bdb
ML		 482 udev_device_unref(ud_dev);
483 continue;
484 }
3b63f34d 485 name = udev_device_get_devnode(ud_dev);
4b97c9fc
ML		 486 /* The serial8250 driver has a hardcoded number of ports.
487 * The only way to tell which actually exist on a given system
488 * is to try to open them and make an ioctl call. */
489 driver = udev_device_get_driver(ud_parent);
eac329d2 490 if (driver && !strcmp(driver, "serial8250")) {
ea667be7
ML		 491 DEBUG("serial8250 device, attempting to open");
492 if ((fd = open(name, O_RDWR | O_NONBLOCK | O_NOCTTY)) < 0) {
493 DEBUG("open failed, skipping");
4b97c9fc 494 goto skip;
ea667be7 495 }
4b97c9fc
ML		 496 ioctl_result = ioctl(fd, TIOCGSERIAL, &serial_info);
497 close(fd);
ea667be7
ML		 498 if (ioctl_result != 0) {
499 DEBUG("ioctl failed, skipping");
4b97c9fc 500 goto skip;
ea667be7
ML		 501 }
502 if (serial_info.type == PORT_UNKNOWN) {
503 DEBUG("port type is unknown, skipping");
4b97c9fc 504 goto skip;
ea667be7 505 }
4b97c9fc 506 }
c33efc48 507 DEBUG("Found port %s", name);
348e23cc 508 list = list_append(list, name);
4b97c9fc 509skip:
3b63f34d 510 udev_device_unref(ud_dev);
eac329d2 511 if (!list) {
c33efc48 512 SET_ERROR(ret, SP_ERR_MEM, "list append failed");
3b63f34d 513 goto out;
77f262c4 514 }
3b63f34d
ML		 515 }
516out:
517 udev_enumerate_unref(ud_enumerate);
518 udev_unref(ud);
3b63f34d 519#endif
77f262c4 520
6b93ede4
ML		 521 switch (ret) {
522 case SP_OK:
77f262c4 523 *list_ptr = list;
c33efc48 524 RETURN_OK();
6b93ede4
ML		 525 case SP_ERR_SUPP:
526 DEBUG_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform.");
527 default:
77f262c4
ML		 528 if (list)
529 sp_free_port_list(list);
77f262c4 530 *list_ptr = NULL;
c33efc48 531 return ret;
77f262c4 532 }
3b63f34d
ML		 533}
534
d54e9004 535void sp_free_port_list(struct sp_port **list)
3b63f34d
ML		 536{
537 unsigned int i;
f92f1f0c 538
c33efc48
ML		 539 TRACE("%p", list);
540
dec10e31
ML		 541 if (!list) {
542 DEBUG("Null list");
543 RETURN();
544 }
545
ea667be7
ML		 546 DEBUG("Freeing port list");
547
3b63f34d 548 for (i = 0; list[i]; i++)
e3b2f7a4 549 sp_free_port(list[i]);
3b63f34d 550 free(list);
c33efc48
ML		 551
552 RETURN();
3b63f34d
ML		 553}
554
c33efc48
ML		 555#define CHECK_PORT() do { \
556 if (port == NULL) \
557 RETURN_ERROR(SP_ERR_ARG, "Null port"); \
dec10e31
ML		 558 if (port->name == NULL) \
559 RETURN_ERROR(SP_ERR_ARG, "Null port name"); \
560} while (0)
561#ifdef _WIN32
562#define CHECK_PORT_HANDLE() do { \
c33efc48
ML		 563 if (port->hdl == INVALID_HANDLE_VALUE) \
564 RETURN_ERROR(SP_ERR_ARG, "Invalid port handle"); \
dec10e31 565} while (0)
74510d4b 566#else
dec10e31 567#define CHECK_PORT_HANDLE() do { \
c33efc48
ML		 568 if (port->fd < 0) \
569 RETURN_ERROR(SP_ERR_ARG, "Invalid port fd"); \
dec10e31 570} while (0)
74510d4b 571#endif
dec10e31
ML		 572#define CHECK_OPEN_PORT() do { \
573 CHECK_PORT(); \
574 CHECK_PORT_HANDLE(); \
575} while (0)
74510d4b 576
eb6ed20f 577enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
74510d4b 578{
bccc7c9f
ML		 579 struct port_data data;
580 struct sp_port_config config;
581 enum sp_return ret;
582
00d8c56d 583 TRACE("%p, 0x%x", port, flags);
c33efc48 584
dec10e31
ML		 585 CHECK_PORT();
586
e3dcf906 587 if (flags > (SP_MODE_READ | SP_MODE_WRITE))
dec10e31 588 RETURN_ERROR(SP_ERR_ARG, "Invalid flags");
74510d4b 589
ea667be7
ML		 590 DEBUG("Opening port %s", port->name);
591
74510d4b
ML		 592#ifdef _WIN32
593 DWORD desired_access = 0, flags_and_attributes = 0;
99945a1f
ML		 594 char *escaped_port_name;
595
596 /* Prefix port name with '\\.\' to work with ports above COM9. */
597 if (!(escaped_port_name = malloc(strlen(port->name + 5))))
c33efc48 598 RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
99945a1f
ML		 599 sprintf(escaped_port_name, "\\\\.\\%s", port->name);
600
74510d4b 601 /* Map 'flags' to the OS-specific settings. */
e3dcf906 602 flags_and_attributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED;
a036341b
ML		 603 if (flags & SP_MODE_READ)
604 desired_access |= GENERIC_READ;
605 if (flags & SP_MODE_WRITE)
74510d4b 606 desired_access |= GENERIC_WRITE;
74510d4b 607
99945a1f 608 port->hdl = CreateFile(escaped_port_name, desired_access, 0, 0,
74510d4b 609 OPEN_EXISTING, flags_and_attributes, 0);
99945a1f
ML		 610
611 free(escaped_port_name);
612
74510d4b 613 if (port->hdl == INVALID_HANDLE_VALUE)
e3dcf906
ML		 614 RETURN_FAIL("port CreateFile() failed");
615
616 /* All timeouts initially disabled. */
617 port->timeouts.ReadIntervalTimeout = 0;
618 port->timeouts.ReadTotalTimeoutMultiplier = 0;
619 port->timeouts.ReadTotalTimeoutConstant = 0;
620 port->timeouts.WriteTotalTimeoutMultiplier = 0;
621 port->timeouts.WriteTotalTimeoutConstant = 0;
a3cb91f5 622
e3dcf906 623 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) {
a3cb91f5
ML		 624 sp_close(port);
625 RETURN_FAIL("SetCommTimeouts() failed");
626 }
e3dcf906
ML		 627
628 /* Prepare OVERLAPPED structures. */
629 memset(&port->read_ovl, 0, sizeof(port->read_ovl));
630 memset(&port->write_ovl, 0, sizeof(port->write_ovl));
631 port->read_ovl.hEvent = INVALID_HANDLE_VALUE;
632 port->write_ovl.hEvent = INVALID_HANDLE_VALUE;
633 if ((port->read_ovl.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL)) == INVALID_HANDLE_VALUE) {
634 sp_close(port);
635 RETURN_FAIL("read event CreateEvent() failed");
636 }
637 if ((port->write_ovl.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL)) == INVALID_HANDLE_VALUE) {
638 sp_close(port);
639 RETURN_FAIL("write event CreateEvent() failed");
640 }
641
642 port->writing = FALSE;
643
74510d4b 644#else
e3dcf906 645 int flags_local = O_NONBLOCK | O_NOCTTY;
f92f1f0c 646
74510d4b 647 /* Map 'flags' to the OS-specific settings. */
a036341b 648 if (flags & (SP_MODE_READ | SP_MODE_WRITE))
74510d4b 649 flags_local |= O_RDWR;
a036341b 650 else if (flags & SP_MODE_READ)
74510d4b 651 flags_local |= O_RDONLY;
a036341b
ML		 652 else if (flags & SP_MODE_WRITE)
653 flags_local |= O_WRONLY;
74510d4b
ML		 654
655 if ((port->fd = open(port->name, flags_local)) < 0)
c33efc48 656 RETURN_FAIL("open() failed");
bccc7c9f 657#endif
9cb98459 658
e33ab9aa
ML		 659 ret = get_config(port, &data, &config);
660
eac329d2 661 if (ret < 0) {
e33ab9aa 662 sp_close(port);
c33efc48 663 RETURN_CODEVAL(ret);
e33ab9aa 664 }
9cb98459 665
bccc7c9f
ML		 666 /* Set sane port settings. */
667#ifdef _WIN32
668 data.dcb.fBinary = TRUE;
669 data.dcb.fDsrSensitivity = FALSE;
670 data.dcb.fErrorChar = FALSE;
671 data.dcb.fNull = FALSE;
672 data.dcb.fAbortOnError = TRUE;
673#else
b251be4b 674 /* Turn off all fancy termios tricks, give us a raw channel. */
c3e05092
UH		 675 data.term.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IMAXBEL);
676#ifdef IUCLC
677 data.term.c_iflag &= ~IUCLC;
678#endif
679 data.term.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET);
680#ifdef OLCUC
681 data.term.c_oflag &= ~OLCUC;
682#endif
683#ifdef NLDLY
684 data.term.c_oflag &= ~NLDLY;
685#endif
686#ifdef CRDLY
687 data.term.c_oflag &= ~CRDLY;
688#endif
689#ifdef TABDLY
690 data.term.c_oflag &= ~TABDLY;
691#endif
692#ifdef BSDLY
693 data.term.c_oflag &= ~BSDLY;
694#endif
695#ifdef VTDLY
696 data.term.c_oflag &= ~VTDLY;
697#endif
698#ifdef FFDLY
699 data.term.c_oflag &= ~FFDLY;
700#endif
b251be4b 701#ifdef OFILL
9cb98459
ML		 702 data.term.c_oflag &= ~OFILL;
703#endif
c3e05092 704 data.term.c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN);
e3dcf906 705 data.term.c_cc[VMIN] = 0;
b251be4b 706 data.term.c_cc[VTIME] = 0;
9cb98459 707
b251be4b
ML		 708 /* Ignore modem status lines; enable receiver; leave control lines alone on close. */
709 data.term.c_cflag |= (CLOCAL | CREAD | HUPCL);
bccc7c9f 710#endif
9cb98459 711
e33ab9aa
ML		 712 ret = set_config(port, &data, &config);
713
eac329d2 714 if (ret < 0) {
e33ab9aa 715 sp_close(port);
c33efc48 716 RETURN_CODEVAL(ret);
e33ab9aa 717 }
74510d4b 718
c33efc48 719 RETURN_OK();
74510d4b
ML		 720}
721
eb6ed20f 722enum sp_return sp_close(struct sp_port *port)
74510d4b 723{
c33efc48
ML		 724 TRACE("%p", port);
725
dec10e31 726 CHECK_OPEN_PORT();
74510d4b 727
ea667be7
ML		 728 DEBUG("Closing port %s", port->name);
729
74510d4b
ML		 730#ifdef _WIN32
731 /* Returns non-zero upon success, 0 upon failure. */
732 if (CloseHandle(port->hdl) == 0)
e3dcf906 733 RETURN_FAIL("port CloseHandle() failed");
8f471c66 734 port->hdl = INVALID_HANDLE_VALUE;
e3dcf906
ML		 735 /* Close event handle created for overlapped reads. */
736 if (port->read_ovl.hEvent != INVALID_HANDLE_VALUE && CloseHandle(port->read_ovl.hEvent) == 0)
737 RETURN_FAIL("read event CloseHandle() failed");
738 /* Close event handle created for overlapped writes. */
739 if (port->write_ovl.hEvent != INVALID_HANDLE_VALUE && CloseHandle(port->write_ovl.hEvent) == 0)
740 RETURN_FAIL("write event CloseHandle() failed");
74510d4b
ML		 741#else
742 /* Returns 0 upon success, -1 upon failure. */
743 if (close(port->fd) == -1)
c33efc48 744 RETURN_FAIL("close() failed");
8f471c66 745 port->fd = -1;
74510d4b
ML		 746#endif
747
c33efc48 748 RETURN_OK();
74510d4b
ML		 749}
750
fd8fd11a 751enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers)
74510d4b 752{
00d8c56d 753 TRACE("%p, 0x%x", port, buffers);
c33efc48 754
dec10e31
ML		 755 CHECK_OPEN_PORT();
756
757 if (buffers > SP_BUF_BOTH)
758 RETURN_ERROR(SP_ERR_ARG, "Invalid buffer selection");
74510d4b 759
0ba3e49b 760 const char *buffer_names[] = {"no", "input", "output", "both"};
ea667be7
ML		 761
762 DEBUG("Flushing %s buffers on port %s", buffer_names[buffers], port->name);
763
74510d4b 764#ifdef _WIN32
fd8fd11a
ML		 765 DWORD flags = 0;
766 if (buffers & SP_BUF_INPUT)
767 flags |= PURGE_RXCLEAR;
768 if (buffers & SP_BUF_OUTPUT)
769 flags |= PURGE_TXCLEAR;
770
74510d4b 771 /* Returns non-zero upon success, 0 upon failure. */
fd8fd11a 772 if (PurgeComm(port->hdl, flags) == 0)
c33efc48 773 RETURN_FAIL("PurgeComm() failed");
74510d4b 774#else
fd8fd11a
ML		 775 int flags = 0;
776 if (buffers & SP_BUF_BOTH)
777 flags = TCIOFLUSH;
778 else if (buffers & SP_BUF_INPUT)
779 flags = TCIFLUSH;
82f424e6 780 else if (buffers & SP_BUF_OUTPUT)
fd8fd11a
ML		 781 flags = TCOFLUSH;
782
74510d4b 783 /* Returns 0 upon success, -1 upon failure. */
fd8fd11a 784 if (tcflush(port->fd, flags) < 0)
c33efc48 785 RETURN_FAIL("tcflush() failed");
74510d4b 786#endif
c33efc48 787 RETURN_OK();
74510d4b
ML		 788}
789
69a3739c
ML		 790enum sp_return sp_drain(struct sp_port *port)
791{
c33efc48
ML		 792 TRACE("%p", port);
793
dec10e31 794 CHECK_OPEN_PORT();
69a3739c 795
ea667be7
ML		 796 DEBUG("Draining port %s", port->name);
797
69a3739c
ML		 798#ifdef _WIN32
799 /* Returns non-zero upon success, 0 upon failure. */
800 if (FlushFileBuffers(port->hdl) == 0)
c33efc48 801 RETURN_FAIL("FlushFileBuffers() failed");
69a3739c
ML		 802#else
803 /* Returns 0 upon success, -1 upon failure. */
804 if (tcdrain(port->fd) < 0)
c33efc48 805 RETURN_FAIL("tcdrain() failed");
69a3739c
ML		 806#endif
807
c33efc48 808 RETURN_OK();
69a3739c
ML		 809}
810
e3dcf906
ML		 811enum sp_return sp_blocking_write(struct sp_port *port, const void *buf, size_t count, unsigned int timeout)
812{
813 TRACE("%p, %p, %d, %d", port, buf, count, timeout);
814
815 CHECK_OPEN_PORT();
816
817 if (!buf)
818 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
819
820 if (timeout)
821 DEBUG("Writing %d bytes to port %s, timeout %d ms", count, port->name, timeout);
822 else
823 DEBUG("Writing %d bytes to port %s, no timeout", count, port->name);
824
825 if (count == 0)
826 RETURN_VALUE("0", 0);
827
828#ifdef _WIN32
829 DWORD bytes_written = 0;
830 BOOL result;
831
832 /* Wait for previous non-blocking write to complete, if any. */
833 if (port->writing) {
834 DEBUG("Waiting for previous write to complete");
835 result = GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
836 port->writing = 0;
837 if (!result)
838 RETURN_FAIL("Previous write failed to complete");
839 DEBUG("Previous write completed");
840 }
841
842 /* Set timeout. */
843 port->timeouts.WriteTotalTimeoutConstant = timeout;
844 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
845 RETURN_FAIL("SetCommTimeouts() failed");
846
847 /* Start write. */
848 if (WriteFile(port->hdl, buf, count, NULL, &port->write_ovl) == 0) {
849 if (GetLastError() == ERROR_IO_PENDING) {
850 DEBUG("Waiting for write to complete");
851 GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
852 DEBUG("Write completed, %d/%d bytes written", bytes_written, count);
853 RETURN_VALUE("%d", bytes_written);
854 } else {
855 RETURN_FAIL("WriteFile() failed");
856 }
857 } else {
858 DEBUG("Write completed immediately");
859 RETURN_VALUE("%d", count);
860 }
861#else
862 size_t bytes_written = 0;
863 unsigned char *ptr = (unsigned char *) buf;
864 struct timeval start, delta, now, end = {0, 0};
865 fd_set fds;
866 int result;
867
868 if (timeout) {
869 /* Get time at start of operation. */
870 gettimeofday(&start, NULL);
871 /* Define duration of timeout. */
872 delta.tv_sec = timeout / 1000;
1b342042 873 delta.tv_usec = (timeout % 1000) * 1000;
e3dcf906
ML		 874 /* Calculate time at which we should give up. */
875 timeradd(&start, &delta, &end);
876 }
877
878 /* Loop until we have written the requested number of bytes. */
879 while (bytes_written < count)
880 {
881 /* Wait until space is available. */
882 FD_ZERO(&fds);
883 FD_SET(port->fd, &fds);
884 if (timeout) {
885 gettimeofday(&now, NULL);
886 if (timercmp(&now, &end, >)) {
887 DEBUG("write timed out");
888 RETURN_VALUE("%d", bytes_written);
889 }
890 timersub(&end, &now, &delta);
891 }
892 result = select(port->fd + 1, NULL, &fds, NULL, timeout ? &delta : NULL);
63a17c64
ML		 893 if (result < 0) {
894 if (errno == EINTR) {
895 DEBUG("select() call was interrupted, repeating");
896 continue;
897 } else {
898 RETURN_FAIL("select() failed");
899 }
900 } else if (result == 0) {
e3dcf906
ML		 901 DEBUG("write timed out");
902 RETURN_VALUE("%d", bytes_written);
903 }
904
905 /* Do write. */
906 result = write(port->fd, ptr, count - bytes_written);
907
908 if (result < 0) {
909 if (errno == EAGAIN)
910 /* This shouldn't happen because we did a select() first, but handle anyway. */
911 continue;
912 else
913 /* This is an actual failure. */
914 RETURN_FAIL("write() failed");
915 }
916
917 bytes_written += result;
918 ptr += result;
919 }
920
921 RETURN_VALUE("%d", bytes_written);
922#endif
923}
924
925enum sp_return sp_nonblocking_write(struct sp_port *port, const void *buf, size_t count)
74510d4b 926{
c33efc48
ML		 927 TRACE("%p, %p, %d", port, buf, count);
928
dec10e31 929 CHECK_OPEN_PORT();
74510d4b
ML		 930
931 if (!buf)
c33efc48 932 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
74510d4b 933
ea667be7
ML		 934 DEBUG("Writing up to %d bytes to port %s", count, port->name);
935
a3cb91f5
ML		 936 if (count == 0)
937 RETURN_VALUE("0", 0);
938
74510d4b
ML		 939#ifdef _WIN32
940 DWORD written = 0;
0765af56 941 BYTE *ptr = (BYTE *) buf;
f92f1f0c 942
e3dcf906
ML		 943 /* Check whether previous write is complete. */
944 if (port->writing) {
945 if (HasOverlappedIoCompleted(&port->write_ovl)) {
946 DEBUG("Previous write completed");
947 port->writing = 0;
948 } else {
949 DEBUG("Previous write not complete");
950 /* Can't take a new write until the previous one finishes. */
951 RETURN_VALUE("0", 0);
a3cb91f5 952 }
e3dcf906 953 }
a3cb91f5 954
e3dcf906
ML		 955 /* Set timeout. */
956 port->timeouts.WriteTotalTimeoutConstant = 0;
957 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
958 RETURN_FAIL("SetCommTimeouts() failed");
959
960 /* Keep writing data until the OS has to actually start an async IO for it.
961 * At that point we know the buffer is full. */
962 while (written < count)
963 {
964 /* Copy first byte of user buffer. */
965 port->pending_byte = *ptr++;
966
967 /* Start asynchronous write. */
968 if (WriteFile(port->hdl, &port->pending_byte, 1, NULL, &port->write_ovl) == 0) {
969 if (GetLastError() == ERROR_IO_PENDING) {
970 DEBUG("Asynchronous write started");
971 port->writing = 1;
972 RETURN_VALUE("%d", ++written);
a3cb91f5 973 } else {
e3dcf906
ML		 974 /* Actual failure of some kind. */
975 RETURN_FAIL("WriteFile() failed");
a3cb91f5 976 }
e3dcf906
ML		 977 } else {
978 DEBUG("Single byte written immediately.");
979 written++;
a3cb91f5
ML		 980 }
981 }
982
e3dcf906
ML		 983 DEBUG("All bytes written immediately.");
984
c33efc48 985 RETURN_VALUE("%d", written);
74510d4b
ML		 986#else
987 /* Returns the number of bytes written, or -1 upon failure. */
988 ssize_t written = write(port->fd, buf, count);
f92f1f0c 989
74510d4b 990 if (written < 0)
c33efc48 991 RETURN_FAIL("write() failed");
74510d4b 992 else
c33efc48 993 RETURN_VALUE("%d", written);
74510d4b
ML		 994#endif
995}
996
e3dcf906
ML		 997enum sp_return sp_blocking_read(struct sp_port *port, void *buf, size_t count, unsigned int timeout)
998{
999 TRACE("%p, %p, %d, %d", port, buf, count, timeout);
1000
1001 CHECK_OPEN_PORT();
1002
1003 if (!buf)
1004 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
1005
1006 if (timeout)
1007 DEBUG("Reading %d bytes from port %s, timeout %d ms", count, port->name, timeout);
1008 else
1009 DEBUG("Reading %d bytes from port %s, no timeout", count, port->name);
1010
1011 if (count == 0)
1012 RETURN_VALUE("0", 0);
1013
1014#ifdef _WIN32
1015 DWORD bytes_read = 0;
1016
1017 /* Set timeout. */
1018 port->timeouts.ReadIntervalTimeout = 0;
1019 port->timeouts.ReadTotalTimeoutConstant = timeout;
1020 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
1021 RETURN_FAIL("SetCommTimeouts() failed");
1022
1023 /* Start read. */
1024 if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0) {
1025 if (GetLastError() == ERROR_IO_PENDING) {
1026 DEBUG("Waiting for read to complete");
1027 GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE);
1028 DEBUG("Read completed, %d/%d bytes read", bytes_read, count);
1029 RETURN_VALUE("%d", bytes_read);
1030 } else {
1031 RETURN_FAIL("ReadFile() failed");
1032 }
1033 } else {
1034 DEBUG("Read completed immediately");
1035 RETURN_VALUE("%d", count);
1036 }
1037#else
1038 size_t bytes_read = 0;
1039 unsigned char *ptr = (unsigned char *) buf;
1040 struct timeval start, delta, now, end = {0, 0};
1041 fd_set fds;
1042 int result;
1043
1044 if (timeout) {
1045 /* Get time at start of operation. */
1046 gettimeofday(&start, NULL);
1047 /* Define duration of timeout. */
1048 delta.tv_sec = timeout / 1000;
1b342042 1049 delta.tv_usec = (timeout % 1000) * 1000;
e3dcf906
ML		 1050 /* Calculate time at which we should give up. */
1051 timeradd(&start, &delta, &end);
1052 }
1053
1054 /* Loop until we have the requested number of bytes. */
1055 while (bytes_read < count)
1056 {
1057 /* Wait until data is available. */
1058 FD_ZERO(&fds);
1059 FD_SET(port->fd, &fds);
1060 if (timeout) {
1061 gettimeofday(&now, NULL);
1062 if (timercmp(&now, &end, >))
1063 /* Timeout has expired. */
1064 RETURN_VALUE("%d", bytes_read);
1065 timersub(&end, &now, &delta);
1066 }
1067 result = select(port->fd + 1, &fds, NULL, NULL, timeout ? &delta : NULL);
63a17c64
ML		 1068 if (result < 0) {
1069 if (errno == EINTR) {
1070 DEBUG("select() call was interrupted, repeating");
1071 continue;
1072 } else {
1073 RETURN_FAIL("select() failed");
1074 }
1075 } else if (result == 0) {
e3dcf906
ML		 1076 DEBUG("read timed out");
1077 RETURN_VALUE("%d", bytes_read);
1078 }
1079
1080 /* Do read. */
1081 result = read(port->fd, ptr, count - bytes_read);
1082
1083 if (result < 0) {
1084 if (errno == EAGAIN)
1085 /* This shouldn't happen because we did a select() first, but handle anyway. */
1086 continue;
1087 else
1088 /* This is an actual failure. */
1089 RETURN_FAIL("read() failed");
1090 }
1091
1092 bytes_read += result;
1093 ptr += result;
1094 }
1095
1096 RETURN_VALUE("%d", bytes_read);
1097#endif
1098}
1099
1100enum sp_return sp_nonblocking_read(struct sp_port *port, void *buf, size_t count)
74510d4b 1101{
c33efc48
ML		 1102 TRACE("%p, %p, %d", port, buf, count);
1103
dec10e31 1104 CHECK_OPEN_PORT();
74510d4b
ML		 1105
1106 if (!buf)
c33efc48 1107 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
74510d4b 1108
ea667be7
ML		 1109 DEBUG("Reading up to %d bytes from port %s", count, port->name);
1110
74510d4b 1111#ifdef _WIN32
e3dcf906 1112 DWORD bytes_read;
f92f1f0c 1113
e3dcf906
ML		 1114 /* Set timeout. */
1115 port->timeouts.ReadIntervalTimeout = MAXDWORD;
1116 port->timeouts.ReadTotalTimeoutConstant = 0;
1117 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
1118 RETURN_FAIL("SetCommTimeouts() failed");
1119
1120 /* Do read. */
1121 if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0)
c33efc48 1122 RETURN_FAIL("ReadFile() failed");
e3dcf906
ML		 1123
1124 /* Get number of bytes read. */
1125 GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE);
1126
c33efc48 1127 RETURN_VALUE("%d", bytes_read);
74510d4b
ML		 1128#else
1129 ssize_t bytes_read;
f92f1f0c 1130
74510d4b 1131 /* Returns the number of bytes read, or -1 upon failure. */
33d5ff47 1132 if ((bytes_read = read(port->fd, buf, count)) < 0) {
e3dcf906
ML		 1133 if (errno == EAGAIN)
1134 /* No bytes available. */
33d5ff47
ML		 1135 bytes_read = 0;
1136 else
1137 /* This is an actual failure. */
1138 RETURN_FAIL("read() failed");
1139 }
c33efc48 1140 RETURN_VALUE("%d", bytes_read);
74510d4b
ML		 1141#endif
1142}
1143
3353c22f
ML		 1144enum sp_return sp_input_waiting(struct sp_port *port)
1145{
1146 TRACE("%p", port);
1147
1148 CHECK_OPEN_PORT();
1149
1150 DEBUG("Checking input bytes waiting on port %s", port->name);
1151
1152#ifdef _WIN32
1153 DWORD errors;
1154 COMSTAT comstat;
1155
1156 if (ClearCommError(port->hdl, &errors, &comstat) == 0)
1157 RETURN_FAIL("ClearComError() failed");
1158 RETURN_VALUE("%d", comstat.cbInQue);
1159#else
1160 int bytes_waiting;
1161 if (ioctl(port->fd, TIOCINQ, &bytes_waiting) < 0)
1162 RETURN_FAIL("TIOCINQ ioctl failed");
1163 RETURN_VALUE("%d", bytes_waiting);
1164#endif
1165}
1166
1167enum sp_return sp_output_waiting(struct sp_port *port)
1168{
1169 TRACE("%p", port);
1170
1171 CHECK_OPEN_PORT();
1172
1173 DEBUG("Checking output bytes waiting on port %s", port->name);
1174
1175#ifdef _WIN32
1176 DWORD errors;
1177 COMSTAT comstat;
1178
1179 if (ClearCommError(port->hdl, &errors, &comstat) == 0)
1180 RETURN_FAIL("ClearComError() failed");
1181 RETURN_VALUE("%d", comstat.cbOutQue);
1182#else
1183 int bytes_waiting;
1184 if (ioctl(port->fd, TIOCOUTQ, &bytes_waiting) < 0)
1185 RETURN_FAIL("TIOCOUTQ ioctl failed");
1186 RETURN_VALUE("%d", bytes_waiting);
1187#endif
1188}
1189
7a6d2196
ML		 1190#ifdef __linux__
1191static enum sp_return get_baudrate(int fd, int *baudrate)
1192{
1193 void *data;
1194
c33efc48
ML		 1195 TRACE("%d, %p", fd, baudrate);
1196
ea667be7
ML		 1197 DEBUG("Getting baud rate");
1198
7a6d2196 1199 if (!(data = malloc(get_termios_size())))
c33efc48 1200 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
7a6d2196 1201
8d43110a
ML		 1202 if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1203 free(data);
c33efc48 1204 RETURN_FAIL("getting termios failed");
8d43110a 1205 }
7a6d2196
ML		 1206
1207 *baudrate = get_termios_speed(data);
1208
8d43110a
ML		 1209 free(data);
1210
c33efc48 1211 RETURN_OK();
7a6d2196
ML		 1212}
1213
1214static enum sp_return set_baudrate(int fd, int baudrate)
1215{
1216 void *data;
1217
c33efc48
ML		 1218 TRACE("%d, %d", fd, baudrate);
1219
ea667be7
ML		 1220 DEBUG("Getting baud rate");
1221
7a6d2196 1222 if (!(data = malloc(get_termios_size())))
c33efc48 1223 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
7a6d2196 1224
8d43110a
ML		 1225 if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1226 free(data);
c33efc48 1227 RETURN_FAIL("getting termios failed");
8d43110a 1228 }
7a6d2196 1229
ea667be7
ML		 1230 DEBUG("Setting baud rate");
1231
7a6d2196
ML		 1232 set_termios_speed(data, baudrate);
1233
8d43110a
ML		 1234 if (ioctl(fd, get_termios_set_ioctl(), data) < 0) {
1235 free(data);
c33efc48 1236 RETURN_FAIL("setting termios failed");
8d43110a
ML		 1237 }
1238
1239 free(data);
7a6d2196 1240
c33efc48 1241 RETURN_OK();
7a6d2196 1242}
40978c2b
ML		 1243
1244#ifdef USE_TERMIOX
1245static enum sp_return get_flow(int fd, int *flow)
1246{
1247 void *data;
1248
c33efc48
ML		 1249 TRACE("%d, %p", fd, flow);
1250
ea667be7
ML		 1251 DEBUG("Getting advanced flow control");
1252
40978c2b 1253 if (!(data = malloc(get_termiox_size())))
c33efc48 1254 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
40978c2b 1255
8d43110a
ML		 1256 if (ioctl(fd, TCGETX, data) < 0) {
1257 free(data);
c33efc48 1258 RETURN_FAIL("getting termiox failed");
8d43110a 1259 }
40978c2b
ML		 1260
1261 *flow = get_termiox_flow(data);
1262
8d43110a
ML		 1263 free(data);
1264
c33efc48 1265 RETURN_OK();
40978c2b
ML		 1266}
1267
1268static enum sp_return set_flow(int fd, int flow)
1269{
1270 void *data;
1271
c33efc48
ML		 1272 TRACE("%d, %d", fd, flow);
1273
ea667be7
ML		 1274 DEBUG("Getting advanced flow control");
1275
40978c2b 1276 if (!(data = malloc(get_termiox_size())))
c33efc48 1277 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
40978c2b 1278
8d43110a
ML		 1279 if (ioctl(fd, TCGETX, data) < 0) {
1280 free(data);
c33efc48 1281 RETURN_FAIL("getting termiox failed");
8d43110a 1282 }
40978c2b 1283
ea667be7
ML		 1284 DEBUG("Setting advanced flow control");
1285
40978c2b
ML		 1286 set_termiox_flow(data, flow);
1287
8d43110a
ML		 1288 if (ioctl(fd, TCSETX, data) < 0) {
1289 free(data);
c33efc48 1290 RETURN_FAIL("setting termiox failed");
8d43110a
ML		 1291 }
1292
1293 free(data);
40978c2b 1294
c33efc48 1295 RETURN_OK();
40978c2b
ML		 1296}
1297#endif /* USE_TERMIOX */
1298#endif /* __linux__ */
7a6d2196 1299
eb6ed20f
ML		 1300static enum sp_return get_config(struct sp_port *port, struct port_data *data,
1301 struct sp_port_config *config)
8094e4a0 1302{
da2748bf 1303 unsigned int i;
cbf628c7 1304
c33efc48
ML		 1305 TRACE("%p, %p, %p", port, data, config);
1306
ea667be7
ML		 1307 DEBUG("Getting configuration for port %s", port->name);
1308
8094e4a0 1309#ifdef _WIN32
e33ab9aa 1310 if (!GetCommState(port->hdl, &data->dcb))
c33efc48 1311 RETURN_FAIL("GetCommState() failed");
8094e4a0 1312
067417af 1313 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
e33ab9aa 1314 if (data->dcb.BaudRate == std_baudrates[i].index) {
067417af
ML		 1315 config->baudrate = std_baudrates[i].value;
1316 break;
1317 }
1318 }
1319
1320 if (i == NUM_STD_BAUDRATES)
1321 /* BaudRate field can be either an index or a custom baud rate. */
e33ab9aa 1322 config->baudrate = data->dcb.BaudRate;
067417af 1323
e33ab9aa 1324 config->bits = data->dcb.ByteSize;
067417af 1325
e33ab9aa
ML		 1326 if (data->dcb.fParity)
1327 switch (data->dcb.Parity) {
067417af
ML		 1328 case NOPARITY:
1329 config->parity = SP_PARITY_NONE;
1330 break;
e432ce60
ML		 1331 case ODDPARITY:
1332 config->parity = SP_PARITY_ODD;
1333 break;
067417af
ML		 1334 case EVENPARITY:
1335 config->parity = SP_PARITY_EVEN;
1336 break;
e432ce60
ML		 1337 case MARKPARITY:
1338 config->parity = SP_PARITY_MARK;
1339 break;
1340 case SPACEPARITY:
1341 config->parity = SP_PARITY_SPACE;
067417af
ML		 1342 break;
1343 default:
1344 config->parity = -1;
1345 }
1346 else
1347 config->parity = SP_PARITY_NONE;
1348
e33ab9aa 1349 switch (data->dcb.StopBits) {
067417af
ML		 1350 case ONESTOPBIT:
1351 config->stopbits = 1;
1352 break;
1353 case TWOSTOPBITS:
1354 config->stopbits = 2;
1355 break;
1356 default:
1357 config->stopbits = -1;
1358 }
1359
e33ab9aa 1360 switch (data->dcb.fRtsControl) {
eac329d2
UH		 1361 case RTS_CONTROL_DISABLE:
1362 config->rts = SP_RTS_OFF;
1363 break;
1364 case RTS_CONTROL_ENABLE:
1365 config->rts = SP_RTS_ON;
1366 break;
1367 case RTS_CONTROL_HANDSHAKE:
1368 config->rts = SP_RTS_FLOW_CONTROL;
1369 break;
1370 default:
1371 config->rts = -1;
067417af
ML		 1372 }
1373
e33ab9aa 1374 config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
067417af 1375
e33ab9aa 1376 switch (data->dcb.fDtrControl) {
eac329d2
UH		 1377 case DTR_CONTROL_DISABLE:
1378 config->dtr = SP_DTR_OFF;
1379 break;
1380 case DTR_CONTROL_ENABLE:
1381 config->dtr = SP_DTR_ON;
1382 break;
1383 case DTR_CONTROL_HANDSHAKE:
1384 config->dtr = SP_DTR_FLOW_CONTROL;
1385 break;
1386 default:
1387 config->dtr = -1;
067417af
ML		 1388 }
1389
e33ab9aa
ML		 1390 config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
1391
c6754b45
ML		 1392 if (data->dcb.fInX) {
1393 if (data->dcb.fOutX)
1394 config->xon_xoff = SP_XONXOFF_INOUT;
1395 else
1396 config->xon_xoff = SP_XONXOFF_IN;
1397 } else {
1398 if (data->dcb.fOutX)
1399 config->xon_xoff = SP_XONXOFF_OUT;
1400 else
1401 config->xon_xoff = SP_XONXOFF_DISABLED;
1402 }
1403
e33ab9aa
ML		 1404#else // !_WIN32
1405
1406 if (tcgetattr(port->fd, &data->term) < 0)
c33efc48 1407 RETURN_FAIL("tcgetattr() failed");
e33ab9aa
ML		 1408
1409 if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
c33efc48 1410 RETURN_FAIL("TIOCMGET ioctl failed");
40978c2b
ML		 1411
1412#ifdef USE_TERMIOX
68ec29db
ML		 1413 int ret = get_flow(port->fd, &data->flow);
1414
1415 if (ret == SP_ERR_FAIL && errno == EINVAL)
1416 data->termiox_supported = 0;
1417 else if (ret < 0)
c33efc48 1418 RETURN_CODEVAL(ret);
68ec29db
ML		 1419 else
1420 data->termiox_supported = 1;
1421#else
1422 data->termiox_supported = 0;
40978c2b
ML		 1423#endif
1424
067417af 1425 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
e33ab9aa 1426 if (cfgetispeed(&data->term) == std_baudrates[i].index) {
067417af
ML		 1427 config->baudrate = std_baudrates[i].value;
1428 break;
1429 }
1430 }
1431
31b3a8f5
MH		 1432 if (i == NUM_STD_BAUDRATES) {
1433#ifdef __APPLE__
1434 config->baudrate = (int)data->term.c_ispeed;
7a6d2196
ML		 1435#elif defined(__linux__)
1436 TRY(get_baudrate(port->fd, &config->baudrate));
31b3a8f5 1437#else
067417af 1438 config->baudrate = -1;
31b3a8f5
MH		 1439#endif
1440 }
067417af 1441
e33ab9aa 1442 switch (data->term.c_cflag & CSIZE) {
067417af
ML		 1443 case CS8:
1444 config->bits = 8;
1445 break;
1446 case CS7:
1447 config->bits = 7;
1448 break;
1449 case CS6:
1450 config->bits = 6;
1451 break;
1452 case CS5:
1453 config->bits = 5;
1454 break;
1455 default:
1456 config->bits = -1;
1457 }
1458
e33ab9aa 1459 if (!(data->term.c_cflag & PARENB) && (data->term.c_iflag & IGNPAR))
067417af 1460 config->parity = SP_PARITY_NONE;
e33ab9aa 1461 else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR))
067417af 1462 config->parity = -1;
c3e05092 1463#ifdef CMSPAR
e432ce60
ML		 1464 else if (data->term.c_cflag & CMSPAR)
1465 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_MARK : SP_PARITY_SPACE;
c3e05092 1466#endif
067417af 1467 else
e33ab9aa 1468 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
067417af 1469
e33ab9aa 1470 config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1;
067417af 1471
e33ab9aa 1472 if (data->term.c_cflag & CRTSCTS) {
067417af
ML		 1473 config->rts = SP_RTS_FLOW_CONTROL;
1474 config->cts = SP_CTS_FLOW_CONTROL;
1475 } else {
68ec29db 1476 if (data->termiox_supported && data->flow & RTS_FLOW)
40978c2b
ML		 1477 config->rts = SP_RTS_FLOW_CONTROL;
1478 else
1479 config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
1480
68ec29db
ML		 1481 config->cts = (data->termiox_supported && data->flow & CTS_FLOW) ?
1482 SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
067417af
ML		 1483 }
1484
68ec29db 1485 if (data->termiox_supported && data->flow & DTR_FLOW)
40978c2b
ML		 1486 config->dtr = SP_DTR_FLOW_CONTROL;
1487 else
1488 config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
1489
68ec29db
ML		 1490 config->dsr = (data->termiox_supported && data->flow & DSR_FLOW) ?
1491 SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
705bdc69 1492
e29b93a5
ML		 1493 if (data->term.c_iflag & IXOFF) {
1494 if (data->term.c_iflag & IXON)
1495 config->xon_xoff = SP_XONXOFF_INOUT;
1496 else
1497 config->xon_xoff = SP_XONXOFF_IN;
1498 } else {
1499 if (data->term.c_iflag & IXON)
1500 config->xon_xoff = SP_XONXOFF_OUT;
1501 else
1502 config->xon_xoff = SP_XONXOFF_DISABLED;
1503 }
067417af
ML		 1504#endif
1505
c33efc48 1506 RETURN_OK();
067417af
ML		 1507}
1508
7a6d2196 1509static enum sp_return set_config(struct sp_port *port, struct port_data *data,
eb6ed20f 1510 const struct sp_port_config *config)
18fc2dd1 1511{
e33ab9aa 1512 unsigned int i;
31b3a8f5
MH		 1513#ifdef __APPLE__
1514 BAUD_TYPE baud_nonstd;
1515
1516 baud_nonstd = B0;
1517#endif
7a6d2196
ML		 1518#ifdef __linux__
1519 int baud_nonstd = 0;
1520#endif
18fc2dd1 1521
c33efc48
ML		 1522 TRACE("%p, %p, %p", port, data, config);
1523
ea667be7
ML		 1524 DEBUG("Setting configuration for port %s", port->name);
1525
e33ab9aa 1526#ifdef _WIN32
eac329d2 1527 if (config->baudrate >= 0) {
e33ab9aa
ML		 1528 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1529 if (config->baudrate == std_baudrates[i].value) {
1530 data->dcb.BaudRate = std_baudrates[i].index;
1531 break;
1532 }
1533 }
18fc2dd1 1534
e33ab9aa
ML		 1535 if (i == NUM_STD_BAUDRATES)
1536 data->dcb.BaudRate = config->baudrate;
1537 }
18fc2dd1 1538
e33ab9aa
ML		 1539 if (config->bits >= 0)
1540 data->dcb.ByteSize = config->bits;
1541
1542 if (config->parity >= 0) {
1543 switch (config->parity) {
1544 /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */
1545 case SP_PARITY_NONE:
1546 data->dcb.Parity = NOPARITY;
1547 break;
e432ce60
ML		 1548 case SP_PARITY_ODD:
1549 data->dcb.Parity = ODDPARITY;
1550 break;
e33ab9aa
ML		 1551 case SP_PARITY_EVEN:
1552 data->dcb.Parity = EVENPARITY;
1553 break;
e432ce60
ML		 1554 case SP_PARITY_MARK:
1555 data->dcb.Parity = MARKPARITY;
1556 break;
1557 case SP_PARITY_SPACE:
1558 data->dcb.Parity = SPACEPARITY;
e33ab9aa
ML		 1559 break;
1560 default:
c33efc48 1561 RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
e33ab9aa 1562 }
18fc2dd1
ML		 1563 }
1564
e33ab9aa
ML		 1565 if (config->stopbits >= 0) {
1566 switch (config->stopbits) {
1567 /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
1568 case 1:
1569 data->dcb.StopBits = ONESTOPBIT;
1570 break;
1571 case 2:
1572 data->dcb.StopBits = TWOSTOPBITS;
1573 break;
1574 default:
c33efc48 1575 RETURN_ERROR(SP_ERR_ARG, "Invalid stop bit setting");
e33ab9aa
ML		 1576 }
1577 }
1578
1579 if (config->rts >= 0) {
1580 switch (config->rts) {
1581 case SP_RTS_OFF:
1582 data->dcb.fRtsControl = RTS_CONTROL_DISABLE;
1583 break;
1584 case SP_RTS_ON:
1585 data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
1586 break;
1587 case SP_RTS_FLOW_CONTROL:
1588 data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
1589 break;
1590 default:
c33efc48 1591 RETURN_ERROR(SP_ERR_ARG, "Invalid RTS setting");
e33ab9aa
ML		 1592 }
1593 }
1594
1595 if (config->cts >= 0) {
1596 switch (config->cts) {
1597 case SP_CTS_IGNORE:
1598 data->dcb.fOutxCtsFlow = FALSE;
1599 break;
1600 case SP_CTS_FLOW_CONTROL:
1601 data->dcb.fOutxCtsFlow = TRUE;
1602 break;
1603 default:
c33efc48 1604 RETURN_ERROR(SP_ERR_ARG, "Invalid CTS setting");
e33ab9aa
ML		 1605 }
1606 }
1607
1608 if (config->dtr >= 0) {
1609 switch (config->dtr) {
1610 case SP_DTR_OFF:
1611 data->dcb.fDtrControl = DTR_CONTROL_DISABLE;
1612 break;
1613 case SP_DTR_ON:
1614 data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
1615 break;
1616 case SP_DTR_FLOW_CONTROL:
1617 data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
1618 break;
1619 default:
c33efc48 1620 RETURN_ERROR(SP_ERR_ARG, "Invalid DTR setting");
e33ab9aa
ML		 1621 }
1622 }
1623
1624 if (config->dsr >= 0) {
1625 switch (config->dsr) {
1626 case SP_DSR_IGNORE:
1627 data->dcb.fOutxDsrFlow = FALSE;
1628 break;
1629 case SP_DSR_FLOW_CONTROL:
1630 data->dcb.fOutxDsrFlow = TRUE;
1631 break;
1632 default:
c33efc48 1633 RETURN_ERROR(SP_ERR_ARG, "Invalid DSR setting");
e33ab9aa 1634 }
18fc2dd1
ML		 1635 }
1636
e33ab9aa
ML		 1637 if (config->xon_xoff >= 0) {
1638 switch (config->xon_xoff) {
1639 case SP_XONXOFF_DISABLED:
1640 data->dcb.fInX = FALSE;
1641 data->dcb.fOutX = FALSE;
1642 break;
1643 case SP_XONXOFF_IN:
1644 data->dcb.fInX = TRUE;
1645 data->dcb.fOutX = FALSE;
1646 break;
1647 case SP_XONXOFF_OUT:
1648 data->dcb.fInX = FALSE;
1649 data->dcb.fOutX = TRUE;
1650 break;
1651 case SP_XONXOFF_INOUT:
1652 data->dcb.fInX = TRUE;
1653 data->dcb.fOutX = TRUE;
1654 break;
1655 default:
c33efc48 1656 RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
e33ab9aa
ML		 1657 }
1658 }
1659
1660 if (!SetCommState(port->hdl, &data->dcb))
c33efc48 1661 RETURN_FAIL("SetCommState() failed");
e33ab9aa 1662
31b3a8f5 1663#else /* !_WIN32 */
e33ab9aa 1664
7a6d2196
ML		 1665 int controlbits;
1666
eac329d2 1667 if (config->baudrate >= 0) {
e33ab9aa
ML		 1668 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1669 if (config->baudrate == std_baudrates[i].value) {
1670 if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
c33efc48 1671 RETURN_FAIL("cfsetospeed() failed");
e33ab9aa
ML		 1672
1673 if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
c33efc48 1674 RETURN_FAIL("cfsetispeed() failed");
e33ab9aa
ML		 1675 break;
1676 }
1677 }
1678
31b3a8f5
MH		 1679 /* Non-standard baud rate */
1680 if (i == NUM_STD_BAUDRATES) {
1681#ifdef __APPLE__
24abdb68 1682 /* Set "dummy" baud rate. */
31b3a8f5 1683 if (cfsetspeed(&data->term, B9600) < 0)
c33efc48 1684 RETURN_FAIL("cfsetspeed() failed");
31b3a8f5 1685 baud_nonstd = config->baudrate;
7a6d2196
ML		 1686#elif defined(__linux__)
1687 baud_nonstd = 1;
31b3a8f5 1688#else
c33efc48 1689 RETURN_ERROR(SP_ERR_SUPP, "Non-standard baudrate not supported");
31b3a8f5
MH		 1690#endif
1691 }
e33ab9aa
ML		 1692 }
1693
1694 if (config->bits >= 0) {
1695 data->term.c_cflag &= ~CSIZE;
1696 switch (config->bits) {
1697 case 8:
1698 data->term.c_cflag |= CS8;
1699 break;
1700 case 7:
1701 data->term.c_cflag |= CS7;
1702 break;
1703 case 6:
1704 data->term.c_cflag |= CS6;
1705 break;
23922313
UH		 1706 case 5:
1707 data->term.c_cflag |= CS5;
1708 break;
e33ab9aa 1709 default:
c33efc48 1710 RETURN_ERROR(SP_ERR_ARG, "Invalid data bits setting");
e33ab9aa
ML		 1711 }
1712 }
1713
1714 if (config->parity >= 0) {
1715 data->term.c_iflag &= ~IGNPAR;
c3e05092
UH		 1716 data->term.c_cflag &= ~(PARENB | PARODD);
1717#ifdef CMSPAR
1718 data->term.c_cflag &= ~CMSPAR;
1719#endif
e33ab9aa
ML		 1720 switch (config->parity) {
1721 case SP_PARITY_NONE:
1722 data->term.c_iflag |= IGNPAR;
1723 break;
1724 case SP_PARITY_EVEN:
1725 data->term.c_cflag |= PARENB;
1726 break;
1727 case SP_PARITY_ODD:
1728 data->term.c_cflag |= PARENB | PARODD;
1729 break;
afb518f0 1730#ifdef CMSPAR
e432ce60 1731 case SP_PARITY_MARK:
c3e05092 1732 data->term.c_cflag |= PARENB | PARODD;
c3e05092 1733 data->term.c_cflag |= CMSPAR;
e432ce60
ML		 1734 break;
1735 case SP_PARITY_SPACE:
c3e05092 1736 data->term.c_cflag |= PARENB;
c3e05092 1737 data->term.c_cflag |= CMSPAR;
e432ce60 1738 break;
afb518f0
ML		 1739#else
1740 case SP_PARITY_MARK:
1741 case SP_PARITY_SPACE:
1742 RETURN_ERROR(SP_ERR_SUPP, "Mark/space parity not supported");
1743#endif
e33ab9aa 1744 default:
c33efc48 1745 RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
e33ab9aa
ML		 1746 }
1747 }
1748
1749 if (config->stopbits >= 0) {
1750 data->term.c_cflag &= ~CSTOPB;
1751 switch (config->stopbits) {
1752 case 1:
1753 data->term.c_cflag &= ~CSTOPB;
1754 break;
1755 case 2:
1756 data->term.c_cflag |= CSTOPB;
1757 break;
1758 default:
c33efc48 1759 RETURN_ERROR(SP_ERR_ARG, "Invalid stop bits setting");
e33ab9aa
ML		 1760 }
1761 }
1762
eac329d2 1763 if (config->rts >= 0 || config->cts >= 0) {
68ec29db
ML		 1764 if (data->termiox_supported) {
1765 data->flow &= ~(RTS_FLOW | CTS_FLOW);
1766 switch (config->rts) {
1767 case SP_RTS_OFF:
1768 case SP_RTS_ON:
1769 controlbits = TIOCM_RTS;
1770 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
c33efc48 1771 RETURN_FAIL("Setting RTS signal level failed");
68ec29db
ML		 1772 break;
1773 case SP_RTS_FLOW_CONTROL:
1774 data->flow |= RTS_FLOW;
1775 break;
1776 default:
1777 break;
e33ab9aa 1778 }
68ec29db
ML		 1779 if (config->cts == SP_CTS_FLOW_CONTROL)
1780 data->flow |= CTS_FLOW;
e33ab9aa 1781
68ec29db 1782 if (data->flow & (RTS_FLOW | CTS_FLOW))
e33ab9aa 1783 data->term.c_iflag |= CRTSCTS;
68ec29db
ML		 1784 else
1785 data->term.c_iflag &= ~CRTSCTS;
1786 } else {
1787 /* Asymmetric use of RTS/CTS not supported. */
1788 if (data->term.c_iflag & CRTSCTS) {
1789 /* Flow control can only be disabled for both RTS & CTS together. */
1790 if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
1791 if (config->cts != SP_CTS_IGNORE)
c33efc48 1792 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
68ec29db
ML		 1793 }
1794 if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
1795 if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
c33efc48 1796 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
68ec29db 1797 }
e33ab9aa 1798 } else {
68ec29db
ML		 1799 /* Flow control can only be enabled for both RTS & CTS together. */
1800 if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
1801 ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
c33efc48 1802 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be enabled together");
68ec29db
ML		 1803 }
1804
1805 if (config->rts >= 0) {
1806 if (config->rts == SP_RTS_FLOW_CONTROL) {
1807 data->term.c_iflag |= CRTSCTS;
1808 } else {
1809 controlbits = TIOCM_RTS;
1810 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
1811 &controlbits) < 0)
c33efc48 1812 RETURN_FAIL("Setting RTS signal level failed");
68ec29db 1813 }
e33ab9aa
ML		 1814 }
1815 }
1816 }
1817
eac329d2 1818 if (config->dtr >= 0 || config->dsr >= 0) {
68ec29db
ML		 1819 if (data->termiox_supported) {
1820 data->flow &= ~(DTR_FLOW | DSR_FLOW);
1821 switch (config->dtr) {
1822 case SP_DTR_OFF:
1823 case SP_DTR_ON:
1824 controlbits = TIOCM_DTR;
1825 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
c33efc48 1826 RETURN_FAIL("Setting DTR signal level failed");
68ec29db
ML		 1827 break;
1828 case SP_DTR_FLOW_CONTROL:
1829 data->flow |= DTR_FLOW;
1830 break;
1831 default:
1832 break;
1833 }
1834 if (config->dsr == SP_DSR_FLOW_CONTROL)
1835 data->flow |= DSR_FLOW;
1836 } else {
1837 /* DTR/DSR flow control not supported. */
1838 if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
c33efc48 1839 RETURN_ERROR(SP_ERR_SUPP, "DTR/DSR flow control not supported");
e33ab9aa 1840
68ec29db
ML		 1841 if (config->dtr >= 0) {
1842 controlbits = TIOCM_DTR;
1843 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
1844 &controlbits) < 0)
c33efc48 1845 RETURN_FAIL("Setting DTR signal level failed");
68ec29db 1846 }
e33ab9aa
ML		 1847 }
1848 }
1849
1850 if (config->xon_xoff >= 0) {
1851 data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
1852 switch (config->xon_xoff) {
1853 case SP_XONXOFF_DISABLED:
1854 break;
1855 case SP_XONXOFF_IN:
1856 data->term.c_iflag |= IXOFF;
1857 break;
1858 case SP_XONXOFF_OUT:
1859 data->term.c_iflag |= IXON | IXANY;
1860 break;
1861 case SP_XONXOFF_INOUT:
1862 data->term.c_iflag |= IXON | IXOFF | IXANY;
1863 break;
1864 default:
c33efc48 1865 RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
e33ab9aa
ML		 1866 }
1867 }
1868
3f5c06d0 1869 if (tcsetattr(port->fd, TCSANOW, &data->term) < 0)
c33efc48 1870 RETURN_FAIL("tcsetattr() failed");
31b3a8f5
MH		 1871
1872#ifdef __APPLE__
1873 if (baud_nonstd != B0) {
1874 if (ioctl(port->fd, IOSSIOSPEED, &baud_nonstd) == -1)
c33efc48 1875 RETURN_FAIL("IOSSIOSPEED ioctl failed");
31b3a8f5
MH		 1876 /* Set baud rates in data->term to correct, but incompatible
1877 * with tcsetattr() value, same as delivered by tcgetattr(). */
1878 if (cfsetspeed(&data->term, baud_nonstd) < 0)
c33efc48 1879 RETURN_FAIL("cfsetspeed() failed");
31b3a8f5 1880 }
7a6d2196
ML		 1881#elif defined(__linux__)
1882 if (baud_nonstd)
1883 TRY(set_baudrate(port->fd, config->baudrate));
40978c2b 1884#ifdef USE_TERMIOX
68ec29db
ML		 1885 if (data->termiox_supported)
1886 TRY(set_flow(port->fd, data->flow));
40978c2b 1887#endif
7a6d2196 1888#endif
31b3a8f5
MH		 1889
1890#endif /* !_WIN32 */
e33ab9aa 1891
c33efc48 1892 RETURN_OK();
e33ab9aa
ML		 1893}
1894
9b1502ef
ML		 1895enum sp_return sp_new_config(struct sp_port_config **config_ptr)
1896{
59131d60 1897 struct sp_port_config *config;
9b1502ef 1898
00d8c56d
UH		 1899 TRACE("%p", config_ptr);
1900
9b1502ef
ML		 1901 if (!config_ptr)
1902 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
1903
59131d60
ML		 1904 *config_ptr = NULL;
1905
1906 if (!(config = malloc(sizeof(struct sp_port_config))))
9b1502ef
ML		 1907 RETURN_ERROR(SP_ERR_MEM, "config malloc failed");
1908
59131d60
ML		 1909 config->baudrate = -1;
1910 config->bits = -1;
1911 config->parity = -1;
1912 config->stopbits = -1;
1913 config->rts = -1;
1914 config->cts = -1;
1915 config->dtr = -1;
1916 config->dsr = -1;
1917
1918 *config_ptr = config;
1919
9b1502ef
ML		 1920 RETURN_OK();
1921}
1922
1923void sp_free_config(struct sp_port_config *config)
1924{
1925 TRACE("%p", config);
1926
1927 if (!config)
1928 DEBUG("Null config");
1929 else
1930 free(config);
1931
1932 RETURN();
1933}
1934
70cd37de
ML		 1935enum sp_return sp_get_config(struct sp_port *port, struct sp_port_config *config)
1936{
1937 struct port_data data;
1938
1939 TRACE("%p, %p", port, config);
1940
1941 CHECK_OPEN_PORT();
1942
1943 if (!config)
9b1502ef 1944 RETURN_ERROR(SP_ERR_ARG, "Null config");
70cd37de
ML		 1945
1946 TRY(get_config(port, &data, config));
1947
1948 RETURN_OK();
1949}
1950
eb6ed20f 1951enum sp_return sp_set_config(struct sp_port *port, const struct sp_port_config *config)
e33ab9aa 1952{
8f189c4c 1953 struct port_data data;
e33ab9aa
ML		 1954 struct sp_port_config prev_config;
1955
c33efc48
ML		 1956 TRACE("%p, %p", port, config);
1957
dec10e31 1958 CHECK_OPEN_PORT();
823690ae
ML		 1959
1960 if (!config)
c33efc48 1961 RETURN_ERROR(SP_ERR_ARG, "Null config");
823690ae 1962
e33ab9aa
ML		 1963 TRY(get_config(port, &data, &prev_config));
1964 TRY(set_config(port, &data, config));
74510d4b 1965
c33efc48 1966 RETURN_OK();
74510d4b
ML		 1967}
1968
9b1502ef
ML		 1969#define CREATE_ACCESSORS(x, type) \
1970enum sp_return sp_set_##x(struct sp_port *port, type x) { \
8f189c4c 1971 struct port_data data; \
e33ab9aa 1972 struct sp_port_config config; \
c33efc48 1973 TRACE("%p, %d", port, x); \
dec10e31 1974 CHECK_OPEN_PORT(); \
e33ab9aa
ML		 1975 TRY(get_config(port, &data, &config)); \
1976 config.x = x; \
1977 TRY(set_config(port, &data, &config)); \
c33efc48 1978 RETURN_OK(); \
9b1502ef
ML		 1979} \
1980enum sp_return sp_get_config_##x(const struct sp_port_config *config, type *x) { \
00d8c56d 1981 TRACE("%p, %p", config, x); \
9b1502ef
ML		 1982 if (!config) \
1983 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
1984 *x = config->x; \
1985 RETURN_OK(); \
1986} \
1987enum sp_return sp_set_config_##x(struct sp_port_config *config, type x) { \
1988 TRACE("%p, %d", config, x); \
1989 if (!config) \
1990 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
1991 config->x = x; \
1992 RETURN_OK(); \
9069c2fb
ML		 1993}
1994
9b1502ef
ML		 1995CREATE_ACCESSORS(baudrate, int)
1996CREATE_ACCESSORS(bits, int)
1997CREATE_ACCESSORS(parity, enum sp_parity)
1998CREATE_ACCESSORS(stopbits, int)
1999CREATE_ACCESSORS(rts, enum sp_rts)
2000CREATE_ACCESSORS(cts, enum sp_cts)
2001CREATE_ACCESSORS(dtr, enum sp_dtr)
2002CREATE_ACCESSORS(dsr, enum sp_dsr)
2003CREATE_ACCESSORS(xon_xoff, enum sp_xonxoff)
2004
2005enum sp_return sp_set_config_flowcontrol(struct sp_port_config *config, enum sp_flowcontrol flowcontrol)
e33ab9aa 2006{
9b1502ef
ML		 2007 if (!config)
2008 RETURN_ERROR(SP_ERR_ARG, "Null configuration");
dec10e31
ML		 2009
2010 if (flowcontrol > SP_FLOWCONTROL_DTRDSR)
2011 RETURN_ERROR(SP_ERR_ARG, "Invalid flow control setting");
823690ae 2012
e33ab9aa 2013 if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
9b1502ef 2014 config->xon_xoff = SP_XONXOFF_INOUT;
e33ab9aa 2015 else
9b1502ef 2016 config->xon_xoff = SP_XONXOFF_DISABLED;
e33ab9aa
ML		 2017
2018 if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
9b1502ef
ML		 2019 config->rts = SP_RTS_FLOW_CONTROL;
2020 config->cts = SP_CTS_FLOW_CONTROL;
e33ab9aa 2021 } else {
9b1502ef
ML		 2022 if (config->rts == SP_RTS_FLOW_CONTROL)
2023 config->rts = SP_RTS_ON;
2024 config->cts = SP_CTS_IGNORE;
e33ab9aa
ML		 2025 }
2026
2027 if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
9b1502ef
ML		 2028 config->dtr = SP_DTR_FLOW_CONTROL;
2029 config->dsr = SP_DSR_FLOW_CONTROL;
e33ab9aa 2030 } else {
9b1502ef
ML		 2031 if (config->dtr == SP_DTR_FLOW_CONTROL)
2032 config->dtr = SP_DTR_ON;
2033 config->dsr = SP_DSR_IGNORE;
e33ab9aa
ML		 2034 }
2035
9b1502ef
ML		 2036 RETURN_OK();
2037}
2038
2039enum sp_return sp_set_flowcontrol(struct sp_port *port, enum sp_flowcontrol flowcontrol)
2040{
2041 struct port_data data;
2042 struct sp_port_config config;
2043
2044 TRACE("%p, %d", port, flowcontrol);
2045
2046 CHECK_OPEN_PORT();
2047
2048 TRY(get_config(port, &data, &config));
2049
2050 TRY(sp_set_config_flowcontrol(&config, flowcontrol));
2051
e33ab9aa
ML		 2052 TRY(set_config(port, &data, &config));
2053
c33efc48 2054 RETURN_OK();
e33ab9aa
ML		 2055}
2056
8cf7c697
ML		 2057enum sp_return sp_get_signals(struct sp_port *port, enum sp_signal *signals)
2058{
c33efc48
ML		 2059 TRACE("%p, %p", port, signals);
2060
dec10e31 2061 CHECK_OPEN_PORT();
8cf7c697
ML		 2062
2063 if (!signals)
c33efc48 2064 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
8cf7c697 2065
ea667be7
ML		 2066 DEBUG("Getting control signals for port %s", port->name);
2067
8cf7c697
ML		 2068 *signals = 0;
2069#ifdef _WIN32
2070 DWORD bits;
2071 if (GetCommModemStatus(port->hdl, &bits) == 0)
c33efc48 2072 RETURN_FAIL("GetCommModemStatus() failed");
8cf7c697
ML		 2073 if (bits & MS_CTS_ON)
2074 *signals |= SP_SIG_CTS;
2075 if (bits & MS_DSR_ON)
2076 *signals |= SP_SIG_DSR;
8cf7c697 2077 if (bits & MS_RLSD_ON)
a6cda1e8
ML		 2078 *signals |= SP_SIG_DCD;
2079 if (bits & MS_RING_ON)
8cf7c697
ML		 2080 *signals |= SP_SIG_RI;
2081#else
2082 int bits;
2083 if (ioctl(port->fd, TIOCMGET, &bits) < 0)
c33efc48 2084 RETURN_FAIL("TIOCMGET ioctl failed");
8cf7c697
ML		 2085 if (bits & TIOCM_CTS)
2086 *signals |= SP_SIG_CTS;
2087 if (bits & TIOCM_DSR)
2088 *signals |= SP_SIG_DSR;
2089 if (bits & TIOCM_CAR)
2090 *signals |= SP_SIG_DCD;
2091 if (bits & TIOCM_RNG)
2092 *signals |= SP_SIG_RI;
2093#endif
c33efc48 2094 RETURN_OK();
8cf7c697
ML		 2095}
2096
90cc3ee6
ML		 2097enum sp_return sp_start_break(struct sp_port *port)
2098{
c33efc48
ML		 2099 TRACE("%p", port);
2100
dec10e31 2101 CHECK_OPEN_PORT();
90cc3ee6
ML		 2102#ifdef _WIN32
2103 if (SetCommBreak(port->hdl) == 0)
c33efc48 2104 RETURN_FAIL("SetCommBreak() failed");
90cc3ee6
ML		 2105#else
2106 if (ioctl(port->fd, TIOCSBRK, 1) < 0)
c33efc48 2107 RETURN_FAIL("TIOCSBRK ioctl failed");
90cc3ee6
ML		 2108#endif
2109
c33efc48 2110 RETURN_OK();
90cc3ee6
ML		 2111}
2112
2113enum sp_return sp_end_break(struct sp_port *port)
2114{
c33efc48
ML		 2115 TRACE("%p", port);
2116
dec10e31 2117 CHECK_OPEN_PORT();
90cc3ee6
ML		 2118#ifdef _WIN32
2119 if (ClearCommBreak(port->hdl) == 0)
c33efc48 2120 RETURN_FAIL("ClearCommBreak() failed");
90cc3ee6
ML		 2121#else
2122 if (ioctl(port->fd, TIOCCBRK, 1) < 0)
c33efc48 2123 RETURN_FAIL("TIOCCBRK ioctl failed");
90cc3ee6
ML		 2124#endif
2125
c33efc48 2126 RETURN_OK();
90cc3ee6
ML		 2127}
2128
74510d4b
ML		 2129int sp_last_error_code(void)
2130{
c33efc48 2131 TRACE("");
74510d4b 2132#ifdef _WIN32
c33efc48 2133 RETURN_VALUE("%d", GetLastError());
74510d4b 2134#else
c33efc48 2135 RETURN_VALUE("%d", errno);
74510d4b
ML		 2136#endif
2137}
2138
74510d4b
ML		 2139char *sp_last_error_message(void)
2140{
c33efc48
ML		 2141 TRACE("");
2142
74510d4b
ML		 2143#ifdef _WIN32
2144 LPVOID message;
2145 DWORD error = GetLastError();
2146
2147 FormatMessage(
2148 FORMAT_MESSAGE_ALLOCATE_BUFFER |
2149 FORMAT_MESSAGE_FROM_SYSTEM |
2150 FORMAT_MESSAGE_IGNORE_INSERTS,
2151 NULL,
2152 error,
2153 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
2154 (LPTSTR) &message,
2155 0, NULL );
2156
c33efc48 2157 RETURN_VALUE("%s", message);
74510d4b 2158#else
c33efc48 2159 RETURN_VALUE("%s", strerror(errno));
74510d4b
ML		 2160#endif
2161}
2162
74510d4b
ML		 2163void sp_free_error_message(char *message)
2164{
c33efc48
ML		 2165 TRACE("%s", message);
2166
74510d4b
ML		 2167#ifdef _WIN32
2168 LocalFree(message);
64eec30d
ML		 2169#else
2170 (void)message;
74510d4b 2171#endif
c33efc48
ML		 2172
2173 RETURN();
74510d4b 2174}
863b35e6
ML		 2175
2176void sp_set_debug_handler(void (*handler)(const char *format, ...))
2177{
c33efc48
ML		 2178 TRACE("%p", handler);
2179
863b35e6 2180 sp_debug_handler = handler;
c33efc48
ML		 2181
2182 RETURN();
863b35e6
ML		 2183}
2184
2185void sp_default_debug_handler(const char *format, ...)
2186{
2187 va_list args;
2188 va_start(args, format);
2189 if (getenv("LIBSERIALPORT_DEBUG")) {
dd7742fb 2190 fputs("sp: ", stderr);
863b35e6
ML		 2191 vfprintf(stderr, format, args);
2192 }
2193 va_end(args);
2194}
Serial port access library