serialport.c

   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  * Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org>
   9  *
  10  * This program is free software: you can redistribute it and/or modify
  11  * it under the terms of the GNU Lesser General Public License as
  12  * published by the Free Software Foundation, either version 3 of the
  13  * License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #include "libserialport.h"
  25 #include "libserialport_internal.h"
  26
  27 static const struct std_baudrate std_baudrates[] = {
  28 #ifdef _WIN32
  29         /*
  30          * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
  31          * have documented CBR_* macros.
  32          */
  33         BAUD(110), BAUD(300), BAUD(600), BAUD(1200), BAUD(2400), BAUD(4800),
  34         BAUD(9600), BAUD(14400), BAUD(19200), BAUD(38400), BAUD(57600),
  35         BAUD(115200), BAUD(128000), BAUD(256000),
  36 #else
  37         BAUD(50), BAUD(75), BAUD(110), BAUD(134), BAUD(150), BAUD(200),
  38         BAUD(300), BAUD(600), BAUD(1200), BAUD(1800), BAUD(2400), BAUD(4800),
  39         BAUD(9600), BAUD(19200), BAUD(38400), BAUD(57600), BAUD(115200),
  40         BAUD(230400),
  41 #if !defined(__APPLE__) && !defined(__OpenBSD__)
  42         BAUD(460800),
  43 #endif
  44 #endif
  45 };
  46
  47 #define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)
  48
  49 void (*sp_debug_handler)(const char *format, ...) = sp_default_debug_handler;
  50
  51 static enum sp_return get_config(struct sp_port *port, struct port_data *data,
  52         struct sp_port_config *config);
  53
  54 static enum sp_return set_config(struct sp_port *port, struct port_data *data,
  55         const struct sp_port_config *config);
  56
  57 SP_API enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
  58 {
  59         struct sp_port *port;
  60 #ifndef NO_PORT_METADATA
  61         enum sp_return ret;
  62 #endif
  63         int len;
  64
  65         TRACE("%s, %p", portname, port_ptr);
  66
  67         if (!port_ptr)
  68                 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
  69
  70         *port_ptr = NULL;
  71
  72         if (!portname)
  73                 RETURN_ERROR(SP_ERR_ARG, "Null port name");
  74
  75         DEBUG_FMT("Building structure for port %s", portname);
  76
  77         if (!(port = malloc(sizeof(struct sp_port))))
  78                 RETURN_ERROR(SP_ERR_MEM, "Port structure malloc failed");
  79
  80         len = strlen(portname) + 1;
  81
  82         if (!(port->name = malloc(len))) {
  83                 free(port);
  84                 RETURN_ERROR(SP_ERR_MEM, "Port name malloc failed");
  85         }
  86
  87         memcpy(port->name, portname, len);
  88
  89 #ifdef _WIN32
  90         port->usb_path = NULL;
  91         port->hdl = INVALID_HANDLE_VALUE;
  92 #else
  93         port->fd = -1;
  94 #endif
  95
  96         port->description = NULL;
  97         port->transport = SP_TRANSPORT_NATIVE;
  98         port->usb_bus = -1;
  99         port->usb_address = -1;
 100         port->usb_vid = -1;
 101         port->usb_pid = -1;
 102         port->usb_manufacturer = NULL;
 103         port->usb_product = NULL;
 104         port->usb_serial = NULL;
 105         port->bluetooth_address = NULL;
 106
 107 #ifndef NO_PORT_METADATA
 108         if ((ret = get_port_details(port)) != SP_OK) {
 109                 sp_free_port(port);
 110                 return ret;
 111         }
 112 #endif
 113
 114         *port_ptr = port;
 115
 116         RETURN_OK();
 117 }
 118
 119 SP_API char *sp_get_port_name(const struct sp_port *port)
 120 {
 121         TRACE("%p", port);
 122
 123         if (!port)
 124                 return NULL;
 125
 126         RETURN_STRING(port->name);
 127 }
 128
 129 SP_API char *sp_get_port_description(const struct sp_port *port)
 130 {
 131         TRACE("%p", port);
 132
 133         if (!port || !port->description)
 134                 return NULL;
 135
 136         RETURN_STRING(port->description);
 137 }
 138
 139 SP_API enum sp_transport sp_get_port_transport(const struct sp_port *port)
 140 {
 141         TRACE("%p", port);
 142
 143         if (!port)
 144                 RETURN_ERROR(SP_ERR_ARG, "Null port");
 145
 146         RETURN_INT(port->transport);
 147 }
 148
 149 SP_API enum sp_return sp_get_port_usb_bus_address(const struct sp_port *port,
 150                                                   int *usb_bus,int *usb_address)
 151 {
 152         TRACE("%p", port);
 153
 154         if (!port)
 155                 RETURN_ERROR(SP_ERR_ARG, "Null port");
 156         if (port->transport != SP_TRANSPORT_USB)
 157                 RETURN_ERROR(SP_ERR_ARG, "Port does not use USB transport");
 158         if (port->usb_bus < 0 || port->usb_address < 0)
 159                 RETURN_ERROR(SP_ERR_SUPP, "Bus and address values are not available");
 160
 161         if (usb_bus)
 162                 *usb_bus = port->usb_bus;
 163         if (usb_address)
 164                 *usb_address = port->usb_address;
 165
 166         RETURN_OK();
 167 }
 168
 169 SP_API enum sp_return sp_get_port_usb_vid_pid(const struct sp_port *port,
 170                                               int *usb_vid, int *usb_pid)
 171 {
 172         TRACE("%p", port);
 173
 174         if (!port)
 175                 RETURN_ERROR(SP_ERR_ARG, "Null port");
 176         if (port->transport != SP_TRANSPORT_USB)
 177                 RETURN_ERROR(SP_ERR_ARG, "Port does not use USB transport");
 178         if (port->usb_vid < 0 || port->usb_pid < 0)
 179                 RETURN_ERROR(SP_ERR_SUPP, "VID:PID values are not available");
 180
 181         if (usb_vid)
 182                 *usb_vid = port->usb_vid;
 183         if (usb_pid)
 184                 *usb_pid = port->usb_pid;
 185
 186         RETURN_OK();
 187 }
 188
 189 SP_API char *sp_get_port_usb_manufacturer(const struct sp_port *port)
 190 {
 191         TRACE("%p", port);
 192
 193         if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_manufacturer)
 194                 return NULL;
 195
 196         RETURN_STRING(port->usb_manufacturer);
 197 }
 198
 199 SP_API char *sp_get_port_usb_product(const struct sp_port *port)
 200 {
 201         TRACE("%p", port);
 202
 203         if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_product)
 204                 return NULL;
 205
 206         RETURN_STRING(port->usb_product);
 207 }
 208
 209 SP_API char *sp_get_port_usb_serial(const struct sp_port *port)
 210 {
 211         TRACE("%p", port);
 212
 213         if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_serial)
 214                 return NULL;
 215
 216         RETURN_STRING(port->usb_serial);
 217 }
 218
 219 SP_API char *sp_get_port_bluetooth_address(const struct sp_port *port)
 220 {
 221         TRACE("%p", port);
 222
 223         if (!port || port->transport != SP_TRANSPORT_BLUETOOTH
 224             || !port->bluetooth_address)
 225                 return NULL;
 226
 227         RETURN_STRING(port->bluetooth_address);
 228 }
 229
 230 SP_API enum sp_return sp_get_port_handle(const struct sp_port *port,
 231                                          void *result_ptr)
 232 {
 233         TRACE("%p, %p", port, result_ptr);
 234
 235         if (!port)
 236                 RETURN_ERROR(SP_ERR_ARG, "Null port");
 237         if (!result_ptr)
 238                 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
 239
 240 #ifdef _WIN32
 241         HANDLE *handle_ptr = result_ptr;
 242         *handle_ptr = port->hdl;
 243 #else
 244         int *fd_ptr = result_ptr;
 245         *fd_ptr = port->fd;
 246 #endif
 247
 248         RETURN_OK();
 249 }
 250
 251 SP_API enum sp_return sp_copy_port(const struct sp_port *port,
 252                                    struct sp_port **copy_ptr)
 253 {
 254         TRACE("%p, %p", port, copy_ptr);
 255
 256         if (!copy_ptr)
 257                 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
 258
 259         *copy_ptr = NULL;
 260
 261         if (!port)
 262                 RETURN_ERROR(SP_ERR_ARG, "Null port");
 263
 264         if (!port->name)
 265                 RETURN_ERROR(SP_ERR_ARG, "Null port name");
 266
 267         DEBUG("Copying port structure");
 268
 269         RETURN_INT(sp_get_port_by_name(port->name, copy_ptr));
 270 }
 271
 272 SP_API void sp_free_port(struct sp_port *port)
 273 {
 274         TRACE("%p", port);
 275
 276         if (!port) {
 277                 DEBUG("Null port");
 278                 RETURN();
 279         }
 280
 281         DEBUG("Freeing port structure");
 282
 283         if (port->name)
 284                 free(port->name);
 285         if (port->description)
 286                 free(port->description);
 287         if (port->usb_manufacturer)
 288                 free(port->usb_manufacturer);
 289         if (port->usb_product)
 290                 free(port->usb_product);
 291         if (port->usb_serial)
 292                 free(port->usb_serial);
 293         if (port->bluetooth_address)
 294                 free(port->bluetooth_address);
 295 #ifdef _WIN32
 296         if (port->usb_path)
 297                 free(port->usb_path);
 298 #endif
 299
 300         free(port);
 301
 302         RETURN();
 303 }
 304
 305 SP_PRIV struct sp_port **list_append(struct sp_port **list,
 306                                      const char *portname)
 307 {
 308         void *tmp;
 309         unsigned int count;
 310
 311         for (count = 0; list[count]; count++);
 312         if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
 313                 goto fail;
 314         list = tmp;
 315         if (sp_get_port_by_name(portname, &list[count]) != SP_OK)
 316                 goto fail;
 317         list[count + 1] = NULL;
 318         return list;
 319
 320 fail:
 321         sp_free_port_list(list);
 322         return NULL;
 323 }
 324
 325 SP_API enum sp_return sp_list_ports(struct sp_port ***list_ptr)
 326 {
 327 #ifndef NO_ENUMERATION
 328         struct sp_port **list;
 329         int ret;
 330 #endif
 331
 332         TRACE("%p", list_ptr);
 333
 334         if (!list_ptr)
 335                 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
 336
 337 #ifdef NO_ENUMERATION
 338         RETURN_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform");
 339 #else
 340         DEBUG("Enumerating ports");
 341
 342         if (!(list = malloc(sizeof(struct sp_port *))))
 343                 RETURN_ERROR(SP_ERR_MEM, "Port list malloc failed");
 344
 345         list[0] = NULL;
 346
 347         ret = list_ports(&list);
 348
 349         if (ret == SP_OK) {
 350                 *list_ptr = list;
 351         } else {
 352                 sp_free_port_list(list);
 353                 *list_ptr = NULL;
 354         }
 355
 356         RETURN_CODEVAL(ret);
 357 #endif
 358 }
 359
 360 SP_API void sp_free_port_list(struct sp_port **list)
 361 {
 362         unsigned int i;
 363
 364         TRACE("%p", list);
 365
 366         if (!list) {
 367                 DEBUG("Null list");
 368                 RETURN();
 369         }
 370
 371         DEBUG("Freeing port list");
 372
 373         for (i = 0; list[i]; i++)
 374                 sp_free_port(list[i]);
 375         free(list);
 376
 377         RETURN();
 378 }
 379
 380 #define CHECK_PORT() do { \
 381         if (!port) \
 382                 RETURN_ERROR(SP_ERR_ARG, "Null port"); \
 383         if (!port->name) \
 384                 RETURN_ERROR(SP_ERR_ARG, "Null port name"); \
 385 } while (0)
 386 #ifdef _WIN32
 387 #define CHECK_PORT_HANDLE() do { \
 388         if (port->hdl == INVALID_HANDLE_VALUE) \
 389                 RETURN_ERROR(SP_ERR_ARG, "Invalid port handle"); \
 390 } while (0)
 391 #else
 392 #define CHECK_PORT_HANDLE() do { \
 393         if (port->fd < 0) \
 394                 RETURN_ERROR(SP_ERR_ARG, "Invalid port fd"); \
 395 } while (0)
 396 #endif
 397 #define CHECK_OPEN_PORT() do { \
 398         CHECK_PORT(); \
 399         CHECK_PORT_HANDLE(); \
 400 } while (0)
 401
 402 #ifdef WIN32
 403 /** To be called after port receive buffer is emptied. */
 404 static enum sp_return restart_wait(struct sp_port *port)
 405 {
 406         DWORD wait_result;
 407
 408         if (port->wait_running) {
 409                 /* Check status of running wait operation. */
 410                 if (GetOverlappedResult(port->hdl, &port->wait_ovl,
 411                                 &wait_result, FALSE)) {
 412                         DEBUG("Previous wait completed");
 413                         port->wait_running = FALSE;
 414                 } else if (GetLastError() == ERROR_IO_INCOMPLETE) {
 415                         DEBUG("Previous wait still running");
 416                         RETURN_OK();
 417                 } else {
 418                         RETURN_FAIL("GetOverlappedResult() failed");
 419                 }
 420         }
 421
 422         if (!port->wait_running) {
 423                 /* Start new wait operation. */
 424                 if (WaitCommEvent(port->hdl, &port->events,
 425                                 &port->wait_ovl)) {
 426                         DEBUG("New wait returned, events already pending");
 427                 } else if (GetLastError() == ERROR_IO_PENDING) {
 428                         DEBUG("New wait running in background");
 429                         port->wait_running = TRUE;
 430                 } else {
 431                         RETURN_FAIL("WaitCommEvent() failed");
 432                 }
 433         }
 434
 435         RETURN_OK();
 436 }
 437 #endif
 438
 439 SP_API enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
 440 {
 441         struct port_data data;
 442         struct sp_port_config config;
 443         enum sp_return ret;
 444
 445         TRACE("%p, 0x%x", port, flags);
 446
 447         CHECK_PORT();
 448
 449         if (flags > SP_MODE_READ_WRITE)
 450                 RETURN_ERROR(SP_ERR_ARG, "Invalid flags");
 451
 452         DEBUG_FMT("Opening port %s", port->name);
 453
 454 #ifdef _WIN32
 455         DWORD desired_access = 0, flags_and_attributes = 0, errors;
 456         char *escaped_port_name;
 457         COMSTAT status;
 458
 459         /* Prefix port name with '\\.\' to work with ports above COM9. */
 460         if (!(escaped_port_name = malloc(strlen(port->name) + 5)))
 461                 RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
 462         sprintf(escaped_port_name, "\\\\.\\%s", port->name);
 463
 464         /* Map 'flags' to the OS-specific settings. */
 465         flags_and_attributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED;
 466         if (flags & SP_MODE_READ)
 467                 desired_access |= GENERIC_READ;
 468         if (flags & SP_MODE_WRITE)
 469                 desired_access |= GENERIC_WRITE;
 470
 471         port->hdl = CreateFile(escaped_port_name, desired_access, 0, 0,
 472                          OPEN_EXISTING, flags_and_attributes, 0);
 473
 474         free(escaped_port_name);
 475
 476         if (port->hdl == INVALID_HANDLE_VALUE)
 477                 RETURN_FAIL("Port CreateFile() failed");
 478
 479         /* All timeouts initially disabled. */
 480         port->timeouts.ReadIntervalTimeout = 0;
 481         port->timeouts.ReadTotalTimeoutMultiplier = 0;
 482         port->timeouts.ReadTotalTimeoutConstant = 0;
 483         port->timeouts.WriteTotalTimeoutMultiplier = 0;
 484         port->timeouts.WriteTotalTimeoutConstant = 0;
 485
 486         if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) {
 487                 sp_close(port);
 488                 RETURN_FAIL("SetCommTimeouts() failed");
 489         }
 490
 491         /* Prepare OVERLAPPED structures. */
 492 #define INIT_OVERLAPPED(ovl) do { \
 493         memset(&port->ovl, 0, sizeof(port->ovl)); \
 494         port->ovl.hEvent = INVALID_HANDLE_VALUE; \
 495         if ((port->ovl.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL)) \
 496                         == INVALID_HANDLE_VALUE) { \
 497                 sp_close(port); \
 498                 RETURN_FAIL(#ovl "CreateEvent() failed"); \
 499         } \
 500 } while (0)
 501
 502         INIT_OVERLAPPED(read_ovl);
 503         INIT_OVERLAPPED(write_ovl);
 504         INIT_OVERLAPPED(wait_ovl);
 505
 506         /* Set event mask for RX and error events. */
 507         if (SetCommMask(port->hdl, EV_RXCHAR | EV_ERR) == 0) {
 508                 sp_close(port);
 509                 RETURN_FAIL("SetCommMask() failed");
 510         }
 511
 512         port->writing = FALSE;
 513         port->wait_running = FALSE;
 514
 515         ret = restart_wait(port);
 516
 517         if (ret < 0) {
 518                 sp_close(port);
 519                 RETURN_CODEVAL(ret);
 520         }
 521 #else
 522         int flags_local = O_NONBLOCK | O_NOCTTY;
 523
 524         /* Map 'flags' to the OS-specific settings. */
 525         if ((flags & SP_MODE_READ_WRITE) == SP_MODE_READ_WRITE)
 526                 flags_local |= O_RDWR;
 527         else if (flags & SP_MODE_READ)
 528                 flags_local |= O_RDONLY;
 529         else if (flags & SP_MODE_WRITE)
 530                 flags_local |= O_WRONLY;
 531
 532         if ((port->fd = open(port->name, flags_local)) < 0)
 533                 RETURN_FAIL("open() failed");
 534 #endif
 535
 536         ret = get_config(port, &data, &config);
 537
 538         if (ret < 0) {
 539                 sp_close(port);
 540                 RETURN_CODEVAL(ret);
 541         }
 542
 543         /* Set sane port settings. */
 544 #ifdef _WIN32
 545         data.dcb.fBinary = TRUE;
 546         data.dcb.fDsrSensitivity = FALSE;
 547         data.dcb.fErrorChar = FALSE;
 548         data.dcb.fNull = FALSE;
 549         data.dcb.fAbortOnError = FALSE;
 550 #else
 551         /* Turn off all fancy termios tricks, give us a raw channel. */
 552         data.term.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IMAXBEL);
 553 #ifdef IUCLC
 554         data.term.c_iflag &= ~IUCLC;
 555 #endif
 556         data.term.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET);
 557 #ifdef OLCUC
 558         data.term.c_oflag &= ~OLCUC;
 559 #endif
 560 #ifdef NLDLY
 561         data.term.c_oflag &= ~NLDLY;
 562 #endif
 563 #ifdef CRDLY
 564         data.term.c_oflag &= ~CRDLY;
 565 #endif
 566 #ifdef TABDLY
 567         data.term.c_oflag &= ~TABDLY;
 568 #endif
 569 #ifdef BSDLY
 570         data.term.c_oflag &= ~BSDLY;
 571 #endif
 572 #ifdef VTDLY
 573         data.term.c_oflag &= ~VTDLY;
 574 #endif
 575 #ifdef FFDLY
 576         data.term.c_oflag &= ~FFDLY;
 577 #endif
 578 #ifdef OFILL
 579         data.term.c_oflag &= ~OFILL;
 580 #endif
 581         data.term.c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN);
 582         data.term.c_cc[VMIN] = 0;
 583         data.term.c_cc[VTIME] = 0;
 584
 585         /* Ignore modem status lines; enable receiver; leave control lines alone on close. */
 586         data.term.c_cflag |= (CLOCAL | CREAD | HUPCL);
 587 #endif
 588
 589 #ifdef _WIN32
 590         if (ClearCommError(port->hdl, &errors, &status) == 0)
 591                 RETURN_FAIL("ClearCommError() failed");
 592 #endif
 593
 594         ret = set_config(port, &data, &config);
 595
 596         if (ret < 0) {
 597                 sp_close(port);
 598                 RETURN_CODEVAL(ret);
 599         }
 600
 601         RETURN_OK();
 602 }
 603
 604 SP_API enum sp_return sp_close(struct sp_port *port)
 605 {
 606         TRACE("%p", port);
 607
 608         CHECK_OPEN_PORT();
 609
 610         DEBUG_FMT("Closing port %s", port->name);
 611
 612 #ifdef _WIN32
 613         /* Returns non-zero upon success, 0 upon failure. */
 614         if (CloseHandle(port->hdl) == 0)
 615                 RETURN_FAIL("Port CloseHandle() failed");
 616         port->hdl = INVALID_HANDLE_VALUE;
 617
 618         /* Close event handles for overlapped structures. */
 619 #define CLOSE_OVERLAPPED(ovl) do { \
 620         if (port->ovl.hEvent != INVALID_HANDLE_VALUE && \
 621                 CloseHandle(port->ovl.hEvent) == 0) \
 622                 RETURN_FAIL(# ovl "event CloseHandle() failed"); \
 623 } while (0)
 624         CLOSE_OVERLAPPED(read_ovl);
 625         CLOSE_OVERLAPPED(write_ovl);
 626         CLOSE_OVERLAPPED(wait_ovl);
 627
 628 #else
 629         /* Returns 0 upon success, -1 upon failure. */
 630         if (close(port->fd) == -1)
 631                 RETURN_FAIL("close() failed");
 632         port->fd = -1;
 633 #endif
 634
 635         RETURN_OK();
 636 }
 637
 638 SP_API enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers)
 639 {
 640         TRACE("%p, 0x%x", port, buffers);
 641
 642         CHECK_OPEN_PORT();
 643
 644         if (buffers > SP_BUF_BOTH)
 645                 RETURN_ERROR(SP_ERR_ARG, "Invalid buffer selection");
 646
 647         const char *buffer_names[] = {"no", "input", "output", "both"};
 648
 649         DEBUG_FMT("Flushing %s buffers on port %s",
 650                 buffer_names[buffers], port->name);
 651
 652 #ifdef _WIN32
 653         DWORD flags = 0;
 654         if (buffers & SP_BUF_INPUT)
 655                 flags |= PURGE_RXCLEAR;
 656         if (buffers & SP_BUF_OUTPUT)
 657                 flags |= PURGE_TXCLEAR;
 658
 659         /* Returns non-zero upon success, 0 upon failure. */
 660         if (PurgeComm(port->hdl, flags) == 0)
 661                 RETURN_FAIL("PurgeComm() failed");
 662
 663         if (buffers & SP_BUF_INPUT)
 664                 TRY(restart_wait(port));
 665 #else
 666         int flags = 0;
 667         if (buffers == SP_BUF_BOTH)
 668                 flags = TCIOFLUSH;
 669         else if (buffers == SP_BUF_INPUT)
 670                 flags = TCIFLUSH;
 671         else if (buffers == SP_BUF_OUTPUT)
 672                 flags = TCOFLUSH;
 673
 674         /* Returns 0 upon success, -1 upon failure. */
 675         if (tcflush(port->fd, flags) < 0)
 676                 RETURN_FAIL("tcflush() failed");
 677 #endif
 678         RETURN_OK();
 679 }
 680
 681 SP_API enum sp_return sp_drain(struct sp_port *port)
 682 {
 683         TRACE("%p", port);
 684
 685         CHECK_OPEN_PORT();
 686
 687         DEBUG_FMT("Draining port %s", port->name);
 688
 689 #ifdef _WIN32
 690         /* Returns non-zero upon success, 0 upon failure. */
 691         if (FlushFileBuffers(port->hdl) == 0)
 692                 RETURN_FAIL("FlushFileBuffers() failed");
 693         RETURN_OK();
 694 #else
 695         int result;
 696         while (1) {
 697 #ifdef __ANDROID__
 698                 int arg = 1;
 699                 result = ioctl(port->fd, TCSBRK, &arg);
 700 #else
 701                 result = tcdrain(port->fd);
 702 #endif
 703                 if (result < 0) {
 704                         if (errno == EINTR) {
 705                                 DEBUG("tcdrain() was interrupted");
 706                                 continue;
 707                         } else {
 708                                 RETURN_FAIL("tcdrain() failed");
 709                         }
 710                 } else {
 711                         RETURN_OK();
 712                 }
 713         }
 714 #endif
 715 }
 716
 717 SP_API enum sp_return sp_blocking_write(struct sp_port *port, const void *buf,
 718                                         size_t count, unsigned int timeout_ms)
 719 {
 720         TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms);
 721
 722         CHECK_OPEN_PORT();
 723
 724         if (!buf)
 725                 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
 726
 727         if (timeout_ms)
 728                 DEBUG_FMT("Writing %d bytes to port %s, timeout %d ms",
 729                         count, port->name, timeout_ms);
 730         else
 731                 DEBUG_FMT("Writing %d bytes to port %s, no timeout",
 732                         count, port->name);
 733
 734         if (count == 0)
 735                 RETURN_INT(0);
 736
 737 #ifdef _WIN32
 738         DWORD bytes_written = 0;
 739         BOOL result;
 740
 741         /* Wait for previous non-blocking write to complete, if any. */
 742         if (port->writing) {
 743                 DEBUG("Waiting for previous write to complete");
 744                 result = GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
 745                 port->writing = 0;
 746                 if (!result)
 747                         RETURN_FAIL("Previous write failed to complete");
 748                 DEBUG("Previous write completed");
 749         }
 750
 751         /* Set timeout. */
 752         port->timeouts.WriteTotalTimeoutConstant = timeout_ms;
 753         if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
 754                 RETURN_FAIL("SetCommTimeouts() failed");
 755
 756         /* Start write. */
 757         if (WriteFile(port->hdl, buf, count, NULL, &port->write_ovl) == 0) {
 758                 if (GetLastError() == ERROR_IO_PENDING) {
 759                         DEBUG("Waiting for write to complete");
 760                         GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
 761                         DEBUG_FMT("Write completed, %d/%d bytes written", bytes_written, count);
 762                         RETURN_INT(bytes_written);
 763                 } else {
 764                         RETURN_FAIL("WriteFile() failed");
 765                 }
 766         } else {
 767                 DEBUG("Write completed immediately");
 768                 RETURN_INT(count);
 769         }
 770 #else
 771         size_t bytes_written = 0;
 772         unsigned char *ptr = (unsigned char *) buf;
 773         struct timeval start, delta, now, end = {0, 0};
 774         fd_set fds;
 775         int result;
 776
 777         if (timeout_ms) {
 778                 /* Get time at start of operation. */
 779                 gettimeofday(&start, NULL);
 780                 /* Define duration of timeout. */
 781                 delta.tv_sec = timeout_ms / 1000;
 782                 delta.tv_usec = (timeout_ms % 1000) * 1000;
 783                 /* Calculate time at which we should give up. */
 784                 timeradd(&start, &delta, &end);
 785         }
 786
 787         /* Loop until we have written the requested number of bytes. */
 788         while (bytes_written < count) {
 789                 /* Wait until space is available. */
 790                 FD_ZERO(&fds);
 791                 FD_SET(port->fd, &fds);
 792                 if (timeout_ms) {
 793                         gettimeofday(&now, NULL);
 794                         if (timercmp(&now, &end, >)) {
 795                                 DEBUG("Write timed out");
 796                                 RETURN_INT(bytes_written);
 797                         }
 798                         timersub(&end, &now, &delta);
 799                 }
 800                 result = select(port->fd + 1, NULL, &fds, NULL, timeout_ms ? &delta : NULL);
 801                 if (result < 0) {
 802                         if (errno == EINTR) {
 803                                 DEBUG("select() call was interrupted, repeating");
 804                                 continue;
 805                         } else {
 806                                 RETURN_FAIL("select() failed");
 807                         }
 808                 } else if (result == 0) {
 809                         DEBUG("Write timed out");
 810                         RETURN_INT(bytes_written);
 811                 }
 812
 813                 /* Do write. */
 814                 result = write(port->fd, ptr, count - bytes_written);
 815
 816                 if (result < 0) {
 817                         if (errno == EAGAIN)
 818                                 /* This shouldn't happen because we did a select() first, but handle anyway. */
 819                                 continue;
 820                         else
 821                                 /* This is an actual failure. */
 822                                 RETURN_FAIL("write() failed");
 823                 }
 824
 825                 bytes_written += result;
 826                 ptr += result;
 827         }
 828
 829         RETURN_INT(bytes_written);
 830 #endif
 831 }
 832
 833 SP_API enum sp_return sp_nonblocking_write(struct sp_port *port,
 834                                            const void *buf, size_t count)
 835 {
 836         TRACE("%p, %p, %d", port, buf, count);
 837
 838         CHECK_OPEN_PORT();
 839
 840         if (!buf)
 841                 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
 842
 843         DEBUG_FMT("Writing up to %d bytes to port %s", count, port->name);
 844
 845         if (count == 0)
 846                 RETURN_INT(0);
 847
 848 #ifdef _WIN32
 849         DWORD written = 0;
 850         BYTE *ptr = (BYTE *) buf;
 851
 852         /* Check whether previous write is complete. */
 853         if (port->writing) {
 854                 if (HasOverlappedIoCompleted(&port->write_ovl)) {
 855                         DEBUG("Previous write completed");
 856                         port->writing = 0;
 857                 } else {
 858                         DEBUG("Previous write not complete");
 859                         /* Can't take a new write until the previous one finishes. */
 860                         RETURN_INT(0);
 861                 }
 862         }
 863
 864         /* Set timeout. */
 865         port->timeouts.WriteTotalTimeoutConstant = 0;
 866         if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
 867                 RETURN_FAIL("SetCommTimeouts() failed");
 868
 869         /*
 870          * Keep writing data until the OS has to actually start an async IO
 871          * for it. At that point we know the buffer is full.
 872          */
 873         while (written < count) {
 874                 /* Copy first byte of user buffer. */
 875                 port->pending_byte = *ptr++;
 876
 877                 /* Start asynchronous write. */
 878                 if (WriteFile(port->hdl, &port->pending_byte, 1, NULL, &port->write_ovl) == 0) {
 879                         if (GetLastError() == ERROR_IO_PENDING) {
 880                                 if (HasOverlappedIoCompleted(&port->write_ovl)) {
 881                                         DEBUG("Asynchronous write completed immediately");
 882                                         port->writing = 0;
 883                                         written++;
 884                                         continue;
 885                                 } else {
 886                                         DEBUG("Asynchronous write running");
 887                                         port->writing = 1;
 888                                         RETURN_INT(++written);
 889                                 }
 890                         } else {
 891                                 /* Actual failure of some kind. */
 892                                 RETURN_FAIL("WriteFile() failed");
 893                         }
 894                 } else {
 895                         DEBUG("Single byte written immediately");
 896                         written++;
 897                 }
 898         }
 899
 900         DEBUG("All bytes written immediately");
 901
 902         RETURN_INT(written);
 903 #else
 904         /* Returns the number of bytes written, or -1 upon failure. */
 905         ssize_t written = write(port->fd, buf, count);
 906
 907         if (written < 0)
 908                 RETURN_FAIL("write() failed");
 909         else
 910                 RETURN_INT(written);
 911 #endif
 912 }
 913
 914 SP_API enum sp_return sp_blocking_read(struct sp_port *port, void *buf,
 915                                        size_t count, unsigned int timeout_ms)
 916 {
 917         TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms);
 918
 919         CHECK_OPEN_PORT();
 920
 921         if (!buf)
 922                 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
 923
 924         if (timeout_ms)
 925                 DEBUG_FMT("Reading %d bytes from port %s, timeout %d ms",
 926                         count, port->name, timeout_ms);
 927         else
 928                 DEBUG_FMT("Reading %d bytes from port %s, no timeout",
 929                         count, port->name);
 930
 931         if (count == 0)
 932                 RETURN_INT(0);
 933
 934 #ifdef _WIN32
 935         DWORD bytes_read = 0;
 936         DWORD bytes_remaining;
 937         int ret;
 938
 939         /* Set timeout. */
 940         port->timeouts.ReadIntervalTimeout = 0;
 941         port->timeouts.ReadTotalTimeoutConstant = timeout_ms;
 942         if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
 943                 RETURN_FAIL("SetCommTimeouts() failed");
 944
 945         /* Start read. */
 946         if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0) {
 947                 if (GetLastError() == ERROR_IO_PENDING) {
 948                         DEBUG("Waiting for read to complete");
 949                         GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE);
 950                         DEBUG_FMT("Read completed, %d/%d bytes read", bytes_read, count);
 951                 } else {
 952                         RETURN_FAIL("ReadFile() failed");
 953                 }
 954         } else {
 955                 DEBUG("Read completed immediately");
 956                 bytes_read = count;
 957         }
 958
 959         ret = sp_input_waiting(port);
 960
 961         if (ret < 0)
 962                 RETURN_CODEVAL(ret);
 963
 964         bytes_remaining = ret;
 965
 966         /* Restart wait operation if buffer was emptied. */
 967         if (bytes_read > 0 && bytes_remaining == 0)
 968                 TRY(restart_wait(port));
 969
 970         RETURN_INT(bytes_read);
 971
 972 #else
 973         size_t bytes_read = 0;
 974         unsigned char *ptr = (unsigned char *) buf;
 975         struct timeval start, delta, now, end = {0, 0};
 976         fd_set fds;
 977         int result;
 978
 979         if (timeout_ms) {
 980                 /* Get time at start of operation. */
 981                 gettimeofday(&start, NULL);
 982                 /* Define duration of timeout. */
 983                 delta.tv_sec = timeout_ms / 1000;
 984                 delta.tv_usec = (timeout_ms % 1000) * 1000;
 985                 /* Calculate time at which we should give up. */
 986                 timeradd(&start, &delta, &end);
 987         }
 988
 989         /* Loop until we have the requested number of bytes. */
 990         while (bytes_read < count) {
 991                 /* Wait until data is available. */
 992                 FD_ZERO(&fds);
 993                 FD_SET(port->fd, &fds);
 994                 if (timeout_ms) {
 995                         gettimeofday(&now, NULL);
 996                         if (timercmp(&now, &end, >))
 997                                 /* Timeout has expired. */
 998                                 RETURN_INT(bytes_read);
 999                         timersub(&end, &now, &delta);
1000                 }
1001                 result = select(port->fd + 1, &fds, NULL, NULL, timeout_ms ? &delta : NULL);
1002                 if (result < 0) {
1003                         if (errno == EINTR) {
1004                                 DEBUG("select() call was interrupted, repeating");
1005                                 continue;
1006                         } else {
1007                                 RETURN_FAIL("select() failed");
1008                         }
1009                 } else if (result == 0) {
1010                         DEBUG("Read timed out");
1011                         RETURN_INT(bytes_read);
1012                 }
1013
1014                 /* Do read. */
1015                 result = read(port->fd, ptr, count - bytes_read);
1016
1017                 if (result < 0) {
1018                         if (errno == EAGAIN)
1019                                 /* This shouldn't happen because we did a select() first, but handle anyway. */
1020                                 continue;
1021                         else
1022                                 /* This is an actual failure. */
1023                                 RETURN_FAIL("read() failed");
1024                 }
1025
1026                 bytes_read += result;
1027                 ptr += result;
1028         }
1029
1030         RETURN_INT(bytes_read);
1031 #endif
1032 }
1033
1034 SP_API enum sp_return sp_nonblocking_read(struct sp_port *port, void *buf,
1035                                           size_t count)
1036 {
1037         TRACE("%p, %p, %d", port, buf, count);
1038
1039         CHECK_OPEN_PORT();
1040
1041         if (!buf)
1042                 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
1043
1044         DEBUG_FMT("Reading up to %d bytes from port %s", count, port->name);
1045
1046 #ifdef _WIN32
1047         DWORD bytes_read;
1048         DWORD bytes_remaining;
1049         int ret;
1050
1051         /* Set timeout. */
1052         port->timeouts.ReadIntervalTimeout = MAXDWORD;
1053         port->timeouts.ReadTotalTimeoutConstant = 0;
1054         if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
1055                 RETURN_FAIL("SetCommTimeouts() failed");
1056
1057         /* Do read. */
1058         if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0)
1059                 RETURN_FAIL("ReadFile() failed");
1060
1061         /* Get number of bytes read. */
1062         if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0)
1063                 RETURN_FAIL("GetOverlappedResult() failed");
1064
1065         ret = sp_input_waiting(port);
1066
1067         if (ret < 0)
1068                 RETURN_CODEVAL(ret);
1069
1070         bytes_remaining = ret;
1071
1072         /* Restart wait operation if buffer was emptied. */
1073         if (bytes_read > 0 && bytes_remaining == 0)
1074                 TRY(restart_wait(port));
1075
1076         RETURN_INT(bytes_read);
1077 #else
1078         ssize_t bytes_read;
1079
1080         /* Returns the number of bytes read, or -1 upon failure. */
1081         if ((bytes_read = read(port->fd, buf, count)) < 0) {
1082                 if (errno == EAGAIN)
1083                         /* No bytes available. */
1084                         bytes_read = 0;
1085                 else
1086                         /* This is an actual failure. */
1087                         RETURN_FAIL("read() failed");
1088         }
1089         RETURN_INT(bytes_read);
1090 #endif
1091 }
1092
1093 SP_API enum sp_return sp_input_waiting(struct sp_port *port)
1094 {
1095         TRACE("%p", port);
1096
1097         CHECK_OPEN_PORT();
1098
1099         DEBUG_FMT("Checking input bytes waiting on port %s", port->name);
1100
1101 #ifdef _WIN32
1102         DWORD errors;
1103         COMSTAT comstat;
1104
1105         if (ClearCommError(port->hdl, &errors, &comstat) == 0)
1106                 RETURN_FAIL("ClearCommError() failed");
1107         RETURN_INT(comstat.cbInQue);
1108 #else
1109         int bytes_waiting;
1110         if (ioctl(port->fd, TIOCINQ, &bytes_waiting) < 0)
1111                 RETURN_FAIL("TIOCINQ ioctl failed");
1112         RETURN_INT(bytes_waiting);
1113 #endif
1114 }
1115
1116 SP_API enum sp_return sp_output_waiting(struct sp_port *port)
1117 {
1118         TRACE("%p", port);
1119
1120         CHECK_OPEN_PORT();
1121
1122         DEBUG_FMT("Checking output bytes waiting on port %s", port->name);
1123
1124 #ifdef _WIN32
1125         DWORD errors;
1126         COMSTAT comstat;
1127
1128         if (ClearCommError(port->hdl, &errors, &comstat) == 0)
1129                 RETURN_FAIL("ClearCommError() failed");
1130         RETURN_INT(comstat.cbOutQue);
1131 #else
1132         int bytes_waiting;
1133         if (ioctl(port->fd, TIOCOUTQ, &bytes_waiting) < 0)
1134                 RETURN_FAIL("TIOCOUTQ ioctl failed");
1135         RETURN_INT(bytes_waiting);
1136 #endif
1137 }
1138
1139 SP_API enum sp_return sp_new_event_set(struct sp_event_set **result_ptr)
1140 {
1141         struct sp_event_set *result;
1142
1143         TRACE("%p", result_ptr);
1144
1145         if (!result_ptr)
1146                 RETURN_ERROR(SP_ERR_ARG, "Null result");
1147
1148         *result_ptr = NULL;
1149
1150         if (!(result = malloc(sizeof(struct sp_event_set))))
1151                 RETURN_ERROR(SP_ERR_MEM, "sp_event_set malloc() failed");
1152
1153         memset(result, 0, sizeof(struct sp_event_set));
1154
1155         *result_ptr = result;
1156
1157         RETURN_OK();
1158 }
1159
1160 static enum sp_return add_handle(struct sp_event_set *event_set,
1161                 event_handle handle, enum sp_event mask)
1162 {
1163         void *new_handles;
1164         enum sp_event *new_masks;
1165
1166         TRACE("%p, %d, %d", event_set, handle, mask);
1167
1168         if (!(new_handles = realloc(event_set->handles,
1169                         sizeof(event_handle) * (event_set->count + 1))))
1170                 RETURN_ERROR(SP_ERR_MEM, "Handle array realloc() failed");
1171
1172         event_set->handles = new_handles;
1173
1174         if (!(new_masks = realloc(event_set->masks,
1175                         sizeof(enum sp_event) * (event_set->count + 1))))
1176                 RETURN_ERROR(SP_ERR_MEM, "Mask array realloc() failed");
1177
1178         event_set->masks = new_masks;
1179
1180         ((event_handle *) event_set->handles)[event_set->count] = handle;
1181         event_set->masks[event_set->count] = mask;
1182
1183         event_set->count++;
1184
1185         RETURN_OK();
1186 }
1187
1188 SP_API enum sp_return sp_add_port_events(struct sp_event_set *event_set,
1189         const struct sp_port *port, enum sp_event mask)
1190 {
1191         TRACE("%p, %p, %d", event_set, port, mask);
1192
1193         if (!event_set)
1194                 RETURN_ERROR(SP_ERR_ARG, "Null event set");
1195
1196         if (!port)
1197                 RETURN_ERROR(SP_ERR_ARG, "Null port");
1198
1199         if (mask > (SP_EVENT_RX_READY | SP_EVENT_TX_READY | SP_EVENT_ERROR))
1200                 RETURN_ERROR(SP_ERR_ARG, "Invalid event mask");
1201
1202         if (!mask)
1203                 RETURN_OK();
1204
1205 #ifdef _WIN32
1206         enum sp_event handle_mask;
1207         if ((handle_mask = mask & SP_EVENT_TX_READY))
1208                 TRY(add_handle(event_set, port->write_ovl.hEvent, handle_mask));
1209         if ((handle_mask = mask & (SP_EVENT_RX_READY | SP_EVENT_ERROR)))
1210                 TRY(add_handle(event_set, port->wait_ovl.hEvent, handle_mask));
1211 #else
1212         TRY(add_handle(event_set, port->fd, mask));
1213 #endif
1214
1215         RETURN_OK();
1216 }
1217
1218 SP_API void sp_free_event_set(struct sp_event_set *event_set)
1219 {
1220         TRACE("%p", event_set);
1221
1222         if (!event_set) {
1223                 DEBUG("Null event set");
1224                 RETURN();
1225         }
1226
1227         DEBUG("Freeing event set");
1228
1229         if (event_set->handles)
1230                 free(event_set->handles);
1231         if (event_set->masks)
1232                 free(event_set->masks);
1233
1234         free(event_set);
1235
1236         RETURN();
1237 }
1238
1239 SP_API enum sp_return sp_wait(struct sp_event_set *event_set,
1240                               unsigned int timeout_ms)
1241 {
1242         TRACE("%p, %d", event_set, timeout_ms);
1243
1244         if (!event_set)
1245                 RETURN_ERROR(SP_ERR_ARG, "Null event set");
1246
1247 #ifdef _WIN32
1248         if (WaitForMultipleObjects(event_set->count, event_set->handles, FALSE,
1249                         timeout_ms ? timeout_ms : INFINITE) == WAIT_FAILED)
1250                 RETURN_FAIL("WaitForMultipleObjects() failed");
1251
1252         RETURN_OK();
1253 #else
1254         struct timeval start, delta, now, end = {0, 0};
1255         int result, timeout_remaining_ms;
1256         struct pollfd *pollfds;
1257         unsigned int i;
1258
1259         if (!(pollfds = malloc(sizeof(struct pollfd) * event_set->count)))
1260                 RETURN_ERROR(SP_ERR_MEM, "pollfds malloc() failed");
1261
1262         for (i = 0; i < event_set->count; i++) {
1263                 pollfds[i].fd = ((int *) event_set->handles)[i];
1264                 pollfds[i].events = 0;
1265                 pollfds[i].revents = 0;
1266                 if (event_set->masks[i] & SP_EVENT_RX_READY)
1267                         pollfds[i].events |= POLLIN;
1268                 if (event_set->masks[i] & SP_EVENT_TX_READY)
1269                         pollfds[i].events |= POLLOUT;
1270                 if (event_set->masks[i] & SP_EVENT_ERROR)
1271                         pollfds[i].events |= POLLERR;
1272         }
1273
1274         if (timeout_ms) {
1275                 /* Get time at start of operation. */
1276                 gettimeofday(&start, NULL);
1277                 /* Define duration of timeout. */
1278                 delta.tv_sec = timeout_ms / 1000;
1279                 delta.tv_usec = (timeout_ms % 1000) * 1000;
1280                 /* Calculate time at which we should give up. */
1281                 timeradd(&start, &delta, &end);
1282         }
1283
1284         /* Loop until an event occurs. */
1285         while (1) {
1286                 if (timeout_ms) {
1287                         gettimeofday(&now, NULL);
1288                         if (timercmp(&now, &end, >)) {
1289                                 DEBUG("Wait timed out");
1290                                 break;
1291                         }
1292                         timersub(&end, &now, &delta);
1293                         timeout_remaining_ms = delta.tv_sec * 1000 + delta.tv_usec / 1000;
1294                 }
1295
1296                 result = poll(pollfds, event_set->count, timeout_ms ? timeout_remaining_ms : -1);
1297
1298                 if (result < 0) {
1299                         if (errno == EINTR) {
1300                                 DEBUG("poll() call was interrupted, repeating");
1301                                 continue;
1302                         } else {
1303                                 free(pollfds);
1304                                 RETURN_FAIL("poll() failed");
1305                         }
1306                 } else if (result == 0) {
1307                         DEBUG("poll() timed out");
1308                         break;
1309                 } else {
1310                         DEBUG("poll() completed");
1311                         break;
1312                 }
1313         }
1314
1315         free(pollfds);
1316         RETURN_OK();
1317 #endif
1318 }
1319
1320 #ifdef USE_TERMIOS_SPEED
1321 static enum sp_return get_baudrate(int fd, int *baudrate)
1322 {
1323         void *data;
1324
1325         TRACE("%d, %p", fd, baudrate);
1326
1327         DEBUG("Getting baud rate");
1328
1329         if (!(data = malloc(get_termios_size())))
1330                 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
1331
1332         if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1333                 free(data);
1334                 RETURN_FAIL("Getting termios failed");
1335         }
1336
1337         *baudrate = get_termios_speed(data);
1338
1339         free(data);
1340
1341         RETURN_OK();
1342 }
1343
1344 static enum sp_return set_baudrate(int fd, int baudrate)
1345 {
1346         void *data;
1347
1348         TRACE("%d, %d", fd, baudrate);
1349
1350         DEBUG("Getting baud rate");
1351
1352         if (!(data = malloc(get_termios_size())))
1353                 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
1354
1355         if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1356                 free(data);
1357                 RETURN_FAIL("Getting termios failed");
1358         }
1359
1360         DEBUG("Setting baud rate");
1361
1362         set_termios_speed(data, baudrate);
1363
1364         if (ioctl(fd, get_termios_set_ioctl(), data) < 0) {
1365                 free(data);
1366                 RETURN_FAIL("Setting termios failed");
1367         }
1368
1369         free(data);
1370
1371         RETURN_OK();
1372 }
1373 #endif /* USE_TERMIOS_SPEED */
1374
1375 #ifdef USE_TERMIOX
1376 static enum sp_return get_flow(int fd, struct port_data *data)
1377 {
1378         void *termx;
1379
1380         TRACE("%d, %p", fd, data);
1381
1382         DEBUG("Getting advanced flow control");
1383
1384         if (!(termx = malloc(get_termiox_size())))
1385                 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
1386
1387         if (ioctl(fd, TCGETX, termx) < 0) {
1388                 free(termx);
1389                 RETURN_FAIL("Getting termiox failed");
1390         }
1391
1392         get_termiox_flow(termx, &data->rts_flow, &data->cts_flow,
1393                         &data->dtr_flow, &data->dsr_flow);
1394
1395         free(termx);
1396
1397         RETURN_OK();
1398 }
1399
1400 static enum sp_return set_flow(int fd, struct port_data *data)
1401 {
1402         void *termx;
1403
1404         TRACE("%d, %p", fd, data);
1405
1406         DEBUG("Getting advanced flow control");
1407
1408         if (!(termx = malloc(get_termiox_size())))
1409                 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
1410
1411         if (ioctl(fd, TCGETX, termx) < 0) {
1412                 free(termx);
1413                 RETURN_FAIL("Getting termiox failed");
1414         }
1415
1416         DEBUG("Setting advanced flow control");
1417
1418         set_termiox_flow(termx, data->rts_flow, data->cts_flow,
1419                         data->dtr_flow, data->dsr_flow);
1420
1421         if (ioctl(fd, TCSETX, termx) < 0) {
1422                 free(termx);
1423                 RETURN_FAIL("Setting termiox failed");
1424         }
1425
1426         free(termx);
1427
1428         RETURN_OK();
1429 }
1430 #endif /* USE_TERMIOX */
1431
1432 static enum sp_return get_config(struct sp_port *port, struct port_data *data,
1433         struct sp_port_config *config)
1434 {
1435         unsigned int i;
1436
1437         TRACE("%p, %p, %p", port, data, config);
1438
1439         DEBUG_FMT("Getting configuration for port %s", port->name);
1440
1441 #ifdef _WIN32
1442         if (!GetCommState(port->hdl, &data->dcb))
1443                 RETURN_FAIL("GetCommState() failed");
1444
1445         for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1446                 if (data->dcb.BaudRate == std_baudrates[i].index) {
1447                         config->baudrate = std_baudrates[i].value;
1448                         break;
1449                 }
1450         }
1451
1452         if (i == NUM_STD_BAUDRATES)
1453                 /* BaudRate field can be either an index or a custom baud rate. */
1454                 config->baudrate = data->dcb.BaudRate;
1455
1456         config->bits = data->dcb.ByteSize;
1457
1458         if (data->dcb.fParity)
1459                 switch (data->dcb.Parity) {
1460                 case NOPARITY:
1461                         config->parity = SP_PARITY_NONE;
1462                         break;
1463                 case ODDPARITY:
1464                         config->parity = SP_PARITY_ODD;
1465                         break;
1466                 case EVENPARITY:
1467                         config->parity = SP_PARITY_EVEN;
1468                         break;
1469                 case MARKPARITY:
1470                         config->parity = SP_PARITY_MARK;
1471                         break;
1472                 case SPACEPARITY:
1473                         config->parity = SP_PARITY_SPACE;
1474                         break;
1475                 default:
1476                         config->parity = -1;
1477                 }
1478         else
1479                 config->parity = SP_PARITY_NONE;
1480
1481         switch (data->dcb.StopBits) {
1482         case ONESTOPBIT:
1483                 config->stopbits = 1;
1484                 break;
1485         case TWOSTOPBITS:
1486                 config->stopbits = 2;
1487                 break;
1488         default:
1489                 config->stopbits = -1;
1490         }
1491
1492         switch (data->dcb.fRtsControl) {
1493         case RTS_CONTROL_DISABLE:
1494                 config->rts = SP_RTS_OFF;
1495                 break;
1496         case RTS_CONTROL_ENABLE:
1497                 config->rts = SP_RTS_ON;
1498                 break;
1499         case RTS_CONTROL_HANDSHAKE:
1500                 config->rts = SP_RTS_FLOW_CONTROL;
1501                 break;
1502         default:
1503                 config->rts = -1;
1504         }
1505
1506         config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
1507
1508         switch (data->dcb.fDtrControl) {
1509         case DTR_CONTROL_DISABLE:
1510                 config->dtr = SP_DTR_OFF;
1511                 break;
1512         case DTR_CONTROL_ENABLE:
1513                 config->dtr = SP_DTR_ON;
1514                 break;
1515         case DTR_CONTROL_HANDSHAKE:
1516                 config->dtr = SP_DTR_FLOW_CONTROL;
1517                 break;
1518         default:
1519                 config->dtr = -1;
1520         }
1521
1522         config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
1523
1524         if (data->dcb.fInX) {
1525                 if (data->dcb.fOutX)
1526                         config->xon_xoff = SP_XONXOFF_INOUT;
1527                 else
1528                         config->xon_xoff = SP_XONXOFF_IN;
1529         } else {
1530                 if (data->dcb.fOutX)
1531                         config->xon_xoff = SP_XONXOFF_OUT;
1532                 else
1533                         config->xon_xoff = SP_XONXOFF_DISABLED;
1534         }
1535
1536 #else // !_WIN32
1537
1538         if (tcgetattr(port->fd, &data->term) < 0)
1539                 RETURN_FAIL("tcgetattr() failed");
1540
1541         if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
1542                 RETURN_FAIL("TIOCMGET ioctl failed");
1543
1544 #ifdef USE_TERMIOX
1545         int ret = get_flow(port->fd, data);
1546
1547         if (ret == SP_ERR_FAIL && errno == EINVAL)
1548                 data->termiox_supported = 0;
1549         else if (ret < 0)
1550                 RETURN_CODEVAL(ret);
1551         else
1552                 data->termiox_supported = 1;
1553 #else
1554         data->termiox_supported = 0;
1555 #endif
1556
1557         for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1558                 if (cfgetispeed(&data->term) == std_baudrates[i].index) {
1559                         config->baudrate = std_baudrates[i].value;
1560                         break;
1561                 }
1562         }
1563
1564         if (i == NUM_STD_BAUDRATES) {
1565 #ifdef __APPLE__
1566                 config->baudrate = (int)data->term.c_ispeed;
1567 #elif defined(USE_TERMIOS_SPEED)
1568                 TRY(get_baudrate(port->fd, &config->baudrate));
1569 #else
1570                 config->baudrate = -1;
1571 #endif
1572         }
1573
1574         switch (data->term.c_cflag & CSIZE) {
1575         case CS8:
1576                 config->bits = 8;
1577                 break;
1578         case CS7:
1579                 config->bits = 7;
1580                 break;
1581         case CS6:
1582                 config->bits = 6;
1583                 break;
1584         case CS5:
1585                 config->bits = 5;
1586                 break;
1587         default:
1588                 config->bits = -1;
1589         }
1590
1591         if (!(data->term.c_cflag & PARENB) && (data->term.c_iflag & IGNPAR))
1592                 config->parity = SP_PARITY_NONE;
1593         else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR))
1594                 config->parity = -1;
1595 #ifdef CMSPAR
1596         else if (data->term.c_cflag & CMSPAR)
1597                 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_MARK : SP_PARITY_SPACE;
1598 #endif
1599         else
1600                 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
1601
1602         config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1;
1603
1604         if (data->term.c_cflag & CRTSCTS) {
1605                 config->rts = SP_RTS_FLOW_CONTROL;
1606                 config->cts = SP_CTS_FLOW_CONTROL;
1607         } else {
1608                 if (data->termiox_supported && data->rts_flow)
1609                         config->rts = SP_RTS_FLOW_CONTROL;
1610                 else
1611                         config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
1612
1613                 config->cts = (data->termiox_supported && data->cts_flow) ?
1614                         SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
1615         }
1616
1617         if (data->termiox_supported && data->dtr_flow)
1618                 config->dtr = SP_DTR_FLOW_CONTROL;
1619         else
1620                 config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
1621
1622         config->dsr = (data->termiox_supported && data->dsr_flow) ?
1623                 SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
1624
1625         if (data->term.c_iflag & IXOFF) {
1626                 if (data->term.c_iflag & IXON)
1627                         config->xon_xoff = SP_XONXOFF_INOUT;
1628                 else
1629                         config->xon_xoff = SP_XONXOFF_IN;
1630         } else {
1631                 if (data->term.c_iflag & IXON)
1632                         config->xon_xoff = SP_XONXOFF_OUT;
1633                 else
1634                         config->xon_xoff = SP_XONXOFF_DISABLED;
1635         }
1636 #endif
1637
1638         RETURN_OK();
1639 }
1640
1641 static enum sp_return set_config(struct sp_port *port, struct port_data *data,
1642         const struct sp_port_config *config)
1643 {
1644         unsigned int i;
1645 #ifdef __APPLE__
1646         BAUD_TYPE baud_nonstd;
1647
1648         baud_nonstd = B0;
1649 #endif
1650 #ifdef USE_TERMIOS_SPEED
1651         int baud_nonstd = 0;
1652 #endif
1653
1654         TRACE("%p, %p, %p", port, data, config);
1655
1656         DEBUG_FMT("Setting configuration for port %s", port->name);
1657
1658 #ifdef _WIN32
1659         if (config->baudrate >= 0) {
1660                 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1661                         if (config->baudrate == std_baudrates[i].value) {
1662                                 data->dcb.BaudRate = std_baudrates[i].index;
1663                                 break;
1664                         }
1665                 }
1666
1667                 if (i == NUM_STD_BAUDRATES)
1668                         data->dcb.BaudRate = config->baudrate;
1669         }
1670
1671         if (config->bits >= 0)
1672                 data->dcb.ByteSize = config->bits;
1673
1674         if (config->parity >= 0) {
1675                 switch (config->parity) {
1676                 case SP_PARITY_NONE:
1677                         data->dcb.Parity = NOPARITY;
1678                         break;
1679                 case SP_PARITY_ODD:
1680                         data->dcb.Parity = ODDPARITY;
1681                         break;
1682                 case SP_PARITY_EVEN:
1683                         data->dcb.Parity = EVENPARITY;
1684                         break;
1685                 case SP_PARITY_MARK:
1686                         data->dcb.Parity = MARKPARITY;
1687                         break;
1688                 case SP_PARITY_SPACE:
1689                         data->dcb.Parity = SPACEPARITY;
1690                         break;
1691                 default:
1692                         RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
1693                 }
1694         }
1695
1696         if (config->stopbits >= 0) {
1697                 switch (config->stopbits) {
1698                 /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
1699                 case 1:
1700                         data->dcb.StopBits = ONESTOPBIT;
1701                         break;
1702                 case 2:
1703                         data->dcb.StopBits = TWOSTOPBITS;
1704                         break;
1705                 default:
1706                         RETURN_ERROR(SP_ERR_ARG, "Invalid stop bit setting");
1707                 }
1708         }
1709
1710         if (config->rts >= 0) {
1711                 switch (config->rts) {
1712                 case SP_RTS_OFF:
1713                         data->dcb.fRtsControl = RTS_CONTROL_DISABLE;
1714                         break;
1715                 case SP_RTS_ON:
1716                         data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
1717                         break;
1718                 case SP_RTS_FLOW_CONTROL:
1719                         data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
1720                         break;
1721                 default:
1722                         RETURN_ERROR(SP_ERR_ARG, "Invalid RTS setting");
1723                 }
1724         }
1725
1726         if (config->cts >= 0) {
1727                 switch (config->cts) {
1728                 case SP_CTS_IGNORE:
1729                         data->dcb.fOutxCtsFlow = FALSE;
1730                         break;
1731                 case SP_CTS_FLOW_CONTROL:
1732                         data->dcb.fOutxCtsFlow = TRUE;
1733                         break;
1734                 default:
1735                         RETURN_ERROR(SP_ERR_ARG, "Invalid CTS setting");
1736                 }
1737         }
1738
1739         if (config->dtr >= 0) {
1740                 switch (config->dtr) {
1741                 case SP_DTR_OFF:
1742                         data->dcb.fDtrControl = DTR_CONTROL_DISABLE;
1743                         break;
1744                 case SP_DTR_ON:
1745                         data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
1746                         break;
1747                 case SP_DTR_FLOW_CONTROL:
1748                         data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
1749                         break;
1750                 default:
1751                         RETURN_ERROR(SP_ERR_ARG, "Invalid DTR setting");
1752                 }
1753         }
1754
1755         if (config->dsr >= 0) {
1756                 switch (config->dsr) {
1757                 case SP_DSR_IGNORE:
1758                         data->dcb.fOutxDsrFlow = FALSE;
1759                         break;
1760                 case SP_DSR_FLOW_CONTROL:
1761                         data->dcb.fOutxDsrFlow = TRUE;
1762                         break;
1763                 default:
1764                         RETURN_ERROR(SP_ERR_ARG, "Invalid DSR setting");
1765                 }
1766         }
1767
1768         if (config->xon_xoff >= 0) {
1769                 switch (config->xon_xoff) {
1770                 case SP_XONXOFF_DISABLED:
1771                         data->dcb.fInX = FALSE;
1772                         data->dcb.fOutX = FALSE;
1773                         break;
1774                 case SP_XONXOFF_IN:
1775                         data->dcb.fInX = TRUE;
1776                         data->dcb.fOutX = FALSE;
1777                         break;
1778                 case SP_XONXOFF_OUT:
1779                         data->dcb.fInX = FALSE;
1780                         data->dcb.fOutX = TRUE;
1781                         break;
1782                 case SP_XONXOFF_INOUT:
1783                         data->dcb.fInX = TRUE;
1784                         data->dcb.fOutX = TRUE;
1785                         break;
1786                 default:
1787                         RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
1788                 }
1789         }
1790
1791         if (!SetCommState(port->hdl, &data->dcb))
1792                 RETURN_FAIL("SetCommState() failed");
1793
1794 #else /* !_WIN32 */
1795
1796         int controlbits;
1797
1798         if (config->baudrate >= 0) {
1799                 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1800                         if (config->baudrate == std_baudrates[i].value) {
1801                                 if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
1802                                         RETURN_FAIL("cfsetospeed() failed");
1803
1804                                 if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
1805                                         RETURN_FAIL("cfsetispeed() failed");
1806                                 break;
1807                         }
1808                 }
1809
1810                 /* Non-standard baud rate */
1811                 if (i == NUM_STD_BAUDRATES) {
1812 #ifdef __APPLE__
1813                         /* Set "dummy" baud rate. */
1814                         if (cfsetspeed(&data->term, B9600) < 0)
1815                                 RETURN_FAIL("cfsetspeed() failed");
1816                         baud_nonstd = config->baudrate;
1817 #elif defined(USE_TERMIOS_SPEED)
1818                         baud_nonstd = 1;
1819 #else
1820                         RETURN_ERROR(SP_ERR_SUPP, "Non-standard baudrate not supported");
1821 #endif
1822                 }
1823         }
1824
1825         if (config->bits >= 0) {
1826                 data->term.c_cflag &= ~CSIZE;
1827                 switch (config->bits) {
1828                 case 8:
1829                         data->term.c_cflag |= CS8;
1830                         break;
1831                 case 7:
1832                         data->term.c_cflag |= CS7;
1833                         break;
1834                 case 6:
1835                         data->term.c_cflag |= CS6;
1836                         break;
1837                 case 5:
1838                         data->term.c_cflag |= CS5;
1839                         break;
1840                 default:
1841                         RETURN_ERROR(SP_ERR_ARG, "Invalid data bits setting");
1842                 }
1843         }
1844
1845         if (config->parity >= 0) {
1846                 data->term.c_iflag &= ~IGNPAR;
1847                 data->term.c_cflag &= ~(PARENB | PARODD);
1848 #ifdef CMSPAR
1849                 data->term.c_cflag &= ~CMSPAR;
1850 #endif
1851                 switch (config->parity) {
1852                 case SP_PARITY_NONE:
1853                         data->term.c_iflag |= IGNPAR;
1854                         break;
1855                 case SP_PARITY_EVEN:
1856                         data->term.c_cflag |= PARENB;
1857                         break;
1858                 case SP_PARITY_ODD:
1859                         data->term.c_cflag |= PARENB | PARODD;
1860                         break;
1861 #ifdef CMSPAR
1862                 case SP_PARITY_MARK:
1863                         data->term.c_cflag |= PARENB | PARODD;
1864                         data->term.c_cflag |= CMSPAR;
1865                         break;
1866                 case SP_PARITY_SPACE:
1867                         data->term.c_cflag |= PARENB;
1868                         data->term.c_cflag |= CMSPAR;
1869                         break;
1870 #else
1871                 case SP_PARITY_MARK:
1872                 case SP_PARITY_SPACE:
1873                         RETURN_ERROR(SP_ERR_SUPP, "Mark/space parity not supported");
1874 #endif
1875                 default:
1876                         RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
1877                 }
1878         }
1879
1880         if (config->stopbits >= 0) {
1881                 data->term.c_cflag &= ~CSTOPB;
1882                 switch (config->stopbits) {
1883                 case 1:
1884                         data->term.c_cflag &= ~CSTOPB;
1885                         break;
1886                 case 2:
1887                         data->term.c_cflag |= CSTOPB;
1888                         break;
1889                 default:
1890                         RETURN_ERROR(SP_ERR_ARG, "Invalid stop bits setting");
1891                 }
1892         }
1893
1894         if (config->rts >= 0 || config->cts >= 0) {
1895                 if (data->termiox_supported) {
1896                         data->rts_flow = data->cts_flow = 0;
1897                         switch (config->rts) {
1898                         case SP_RTS_OFF:
1899                         case SP_RTS_ON:
1900                                 controlbits = TIOCM_RTS;
1901                                 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
1902                                         RETURN_FAIL("Setting RTS signal level failed");
1903                                 break;
1904                         case SP_RTS_FLOW_CONTROL:
1905                                 data->rts_flow = 1;
1906                                 break;
1907                         default:
1908                                 break;
1909                         }
1910                         if (config->cts == SP_CTS_FLOW_CONTROL)
1911                                 data->cts_flow = 1;
1912
1913                         if (data->rts_flow && data->cts_flow)
1914                                 data->term.c_iflag |= CRTSCTS;
1915                         else
1916                                 data->term.c_iflag &= ~CRTSCTS;
1917                 } else {
1918                         /* Asymmetric use of RTS/CTS not supported. */
1919                         if (data->term.c_iflag & CRTSCTS) {
1920                                 /* Flow control can only be disabled for both RTS & CTS together. */
1921                                 if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
1922                                         if (config->cts != SP_CTS_IGNORE)
1923                                                 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
1924                                 }
1925                                 if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
1926                                         if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
1927                                                 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
1928                                 }
1929                         } else {
1930                                 /* Flow control can only be enabled for both RTS & CTS together. */
1931                                 if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
1932                                         ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
1933                                         RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be enabled together");
1934                         }
1935
1936                         if (config->rts >= 0) {
1937                                 if (config->rts == SP_RTS_FLOW_CONTROL) {
1938                                         data->term.c_iflag |= CRTSCTS;
1939                                 } else {
1940                                         controlbits = TIOCM_RTS;
1941                                         if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
1942                                                         &controlbits) < 0)
1943                                                 RETURN_FAIL("Setting RTS signal level failed");
1944                                 }
1945                         }
1946                 }
1947         }
1948
1949         if (config->dtr >= 0 || config->dsr >= 0) {
1950                 if (data->termiox_supported) {
1951                         data->dtr_flow = data->dsr_flow = 0;
1952                         switch (config->dtr) {
1953                         case SP_DTR_OFF:
1954                         case SP_DTR_ON:
1955                                 controlbits = TIOCM_DTR;
1956                                 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
1957                                         RETURN_FAIL("Setting DTR signal level failed");
1958                                 break;
1959                         case SP_DTR_FLOW_CONTROL:
1960                                 data->dtr_flow = 1;
1961                                 break;
1962                         default:
1963                                 break;
1964                         }
1965                         if (config->dsr == SP_DSR_FLOW_CONTROL)
1966                                 data->dsr_flow = 1;
1967                 } else {
1968                         /* DTR/DSR flow control not supported. */
1969                         if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
1970                                 RETURN_ERROR(SP_ERR_SUPP, "DTR/DSR flow control not supported");
1971
1972                         if (config->dtr >= 0) {
1973                                 controlbits = TIOCM_DTR;
1974                                 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
1975                                                 &controlbits) < 0)
1976                                         RETURN_FAIL("Setting DTR signal level failed");
1977                         }
1978                 }
1979         }
1980
1981         if (config->xon_xoff >= 0) {
1982                 data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
1983                 switch (config->xon_xoff) {
1984                 case SP_XONXOFF_DISABLED:
1985                         break;
1986                 case SP_XONXOFF_IN:
1987                         data->term.c_iflag |= IXOFF;
1988                         break;
1989                 case SP_XONXOFF_OUT:
1990                         data->term.c_iflag |= IXON | IXANY;
1991                         break;
1992                 case SP_XONXOFF_INOUT:
1993                         data->term.c_iflag |= IXON | IXOFF | IXANY;
1994                         break;
1995                 default:
1996                         RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
1997                 }
1998         }
1999
2000         if (tcsetattr(port->fd, TCSANOW, &data->term) < 0)
2001                 RETURN_FAIL("tcsetattr() failed");
2002
2003 #ifdef __APPLE__
2004         if (baud_nonstd != B0) {
2005                 if (ioctl(port->fd, IOSSIOSPEED, &baud_nonstd) == -1)
2006                         RETURN_FAIL("IOSSIOSPEED ioctl failed");
2007                 /*
2008                  * Set baud rates in data->term to correct, but incompatible
2009                  * with tcsetattr() value, same as delivered by tcgetattr().
2010                  */
2011                 if (cfsetspeed(&data->term, baud_nonstd) < 0)
2012                         RETURN_FAIL("cfsetspeed() failed");
2013         }
2014 #elif defined(__linux__)
2015 #ifdef USE_TERMIOS_SPEED
2016         if (baud_nonstd)
2017                 TRY(set_baudrate(port->fd, config->baudrate));
2018 #endif
2019 #ifdef USE_TERMIOX
2020         if (data->termiox_supported)
2021                 TRY(set_flow(port->fd, data));
2022 #endif
2023 #endif
2024
2025 #endif /* !_WIN32 */
2026
2027         RETURN_OK();
2028 }
2029
2030 SP_API enum sp_return sp_new_config(struct sp_port_config **config_ptr)
2031 {
2032         struct sp_port_config *config;
2033
2034         TRACE("%p", config_ptr);
2035
2036         if (!config_ptr)
2037                 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
2038
2039         *config_ptr = NULL;
2040
2041         if (!(config = malloc(sizeof(struct sp_port_config))))
2042                 RETURN_ERROR(SP_ERR_MEM, "Config malloc failed");
2043
2044         config->baudrate = -1;
2045         config->bits = -1;
2046         config->parity = -1;
2047         config->stopbits = -1;
2048         config->rts = -1;
2049         config->cts = -1;
2050         config->dtr = -1;
2051         config->dsr = -1;
2052
2053         *config_ptr = config;
2054
2055         RETURN_OK();
2056 }
2057
2058 SP_API void sp_free_config(struct sp_port_config *config)
2059 {
2060         TRACE("%p", config);
2061
2062         if (!config)
2063                 DEBUG("Null config");
2064         else
2065                 free(config);
2066
2067         RETURN();
2068 }
2069
2070 SP_API enum sp_return sp_get_config(struct sp_port *port,
2071                                     struct sp_port_config *config)
2072 {
2073         struct port_data data;
2074
2075         TRACE("%p, %p", port, config);
2076
2077         CHECK_OPEN_PORT();
2078
2079         if (!config)
2080                 RETURN_ERROR(SP_ERR_ARG, "Null config");
2081
2082         TRY(get_config(port, &data, config));
2083
2084         RETURN_OK();
2085 }
2086
2087 SP_API enum sp_return sp_set_config(struct sp_port *port,
2088                                     const struct sp_port_config *config)
2089 {
2090         struct port_data data;
2091         struct sp_port_config prev_config;
2092
2093         TRACE("%p, %p", port, config);
2094
2095         CHECK_OPEN_PORT();
2096
2097         if (!config)
2098                 RETURN_ERROR(SP_ERR_ARG, "Null config");
2099
2100         TRY(get_config(port, &data, &prev_config));
2101         TRY(set_config(port, &data, config));
2102
2103         RETURN_OK();
2104 }
2105
2106 #define CREATE_ACCESSORS(x, type) \
2107 SP_API enum sp_return sp_set_##x(struct sp_port *port, type x) { \
2108         struct port_data data; \
2109         struct sp_port_config config; \
2110         TRACE("%p, %d", port, x); \
2111         CHECK_OPEN_PORT(); \
2112         TRY(get_config(port, &data, &config)); \
2113         config.x = x; \
2114         TRY(set_config(port, &data, &config)); \
2115         RETURN_OK(); \
2116 } \
2117 SP_API enum sp_return sp_get_config_##x(const struct sp_port_config *config, \
2118                                         type *x) { \
2119         TRACE("%p, %p", config, x); \
2120         if (!config) \
2121                 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
2122         *x = config->x; \
2123         RETURN_OK(); \
2124 } \
2125 SP_API enum sp_return sp_set_config_##x(struct sp_port_config *config, \
2126                                         type x) { \
2127         TRACE("%p, %d", config, x); \
2128         if (!config) \
2129                 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
2130         config->x = x; \
2131         RETURN_OK(); \
2132 }
2133
2134 CREATE_ACCESSORS(baudrate, int)
2135 CREATE_ACCESSORS(bits, int)
2136 CREATE_ACCESSORS(parity, enum sp_parity)
2137 CREATE_ACCESSORS(stopbits, int)
2138 CREATE_ACCESSORS(rts, enum sp_rts)
2139 CREATE_ACCESSORS(cts, enum sp_cts)
2140 CREATE_ACCESSORS(dtr, enum sp_dtr)
2141 CREATE_ACCESSORS(dsr, enum sp_dsr)
2142 CREATE_ACCESSORS(xon_xoff, enum sp_xonxoff)
2143
2144 SP_API enum sp_return sp_set_config_flowcontrol(struct sp_port_config *config,
2145                                                 enum sp_flowcontrol flowcontrol)
2146 {
2147         if (!config)
2148                 RETURN_ERROR(SP_ERR_ARG, "Null configuration");
2149
2150         if (flowcontrol > SP_FLOWCONTROL_DTRDSR)
2151                 RETURN_ERROR(SP_ERR_ARG, "Invalid flow control setting");
2152
2153         if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
2154                 config->xon_xoff = SP_XONXOFF_INOUT;
2155         else
2156                 config->xon_xoff = SP_XONXOFF_DISABLED;
2157
2158         if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
2159                 config->rts = SP_RTS_FLOW_CONTROL;
2160                 config->cts = SP_CTS_FLOW_CONTROL;
2161         } else {
2162                 if (config->rts == SP_RTS_FLOW_CONTROL)
2163                         config->rts = SP_RTS_ON;
2164                 config->cts = SP_CTS_IGNORE;
2165         }
2166
2167         if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
2168                 config->dtr = SP_DTR_FLOW_CONTROL;
2169                 config->dsr = SP_DSR_FLOW_CONTROL;
2170         } else {
2171                 if (config->dtr == SP_DTR_FLOW_CONTROL)
2172                         config->dtr = SP_DTR_ON;
2173                 config->dsr = SP_DSR_IGNORE;
2174         }
2175
2176         RETURN_OK();
2177 }
2178
2179 SP_API enum sp_return sp_set_flowcontrol(struct sp_port *port,
2180                                          enum sp_flowcontrol flowcontrol)
2181 {
2182         struct port_data data;
2183         struct sp_port_config config;
2184
2185         TRACE("%p, %d", port, flowcontrol);
2186
2187         CHECK_OPEN_PORT();
2188
2189         TRY(get_config(port, &data, &config));
2190
2191         TRY(sp_set_config_flowcontrol(&config, flowcontrol));
2192
2193         TRY(set_config(port, &data, &config));
2194
2195         RETURN_OK();
2196 }
2197
2198 SP_API enum sp_return sp_get_signals(struct sp_port *port,
2199                                      enum sp_signal *signals)
2200 {
2201         TRACE("%p, %p", port, signals);
2202
2203         CHECK_OPEN_PORT();
2204
2205         if (!signals)
2206                 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
2207
2208         DEBUG_FMT("Getting control signals for port %s", port->name);
2209
2210         *signals = 0;
2211 #ifdef _WIN32
2212         DWORD bits;
2213         if (GetCommModemStatus(port->hdl, &bits) == 0)
2214                 RETURN_FAIL("GetCommModemStatus() failed");
2215         if (bits & MS_CTS_ON)
2216                 *signals |= SP_SIG_CTS;
2217         if (bits & MS_DSR_ON)
2218                 *signals |= SP_SIG_DSR;
2219         if (bits & MS_RLSD_ON)
2220                 *signals |= SP_SIG_DCD;
2221         if (bits & MS_RING_ON)
2222                 *signals |= SP_SIG_RI;
2223 #else
2224         int bits;
2225         if (ioctl(port->fd, TIOCMGET, &bits) < 0)
2226                 RETURN_FAIL("TIOCMGET ioctl failed");
2227         if (bits & TIOCM_CTS)
2228                 *signals |= SP_SIG_CTS;
2229         if (bits & TIOCM_DSR)
2230                 *signals |= SP_SIG_DSR;
2231         if (bits & TIOCM_CAR)
2232                 *signals |= SP_SIG_DCD;
2233         if (bits & TIOCM_RNG)
2234                 *signals |= SP_SIG_RI;
2235 #endif
2236         RETURN_OK();
2237 }
2238
2239 SP_API enum sp_return sp_start_break(struct sp_port *port)
2240 {
2241         TRACE("%p", port);
2242
2243         CHECK_OPEN_PORT();
2244 #ifdef _WIN32
2245         if (SetCommBreak(port->hdl) == 0)
2246                 RETURN_FAIL("SetCommBreak() failed");
2247 #else
2248         if (ioctl(port->fd, TIOCSBRK, 1) < 0)
2249                 RETURN_FAIL("TIOCSBRK ioctl failed");
2250 #endif
2251
2252         RETURN_OK();
2253 }
2254
2255 SP_API enum sp_return sp_end_break(struct sp_port *port)
2256 {
2257         TRACE("%p", port);
2258
2259         CHECK_OPEN_PORT();
2260 #ifdef _WIN32
2261         if (ClearCommBreak(port->hdl) == 0)
2262                 RETURN_FAIL("ClearCommBreak() failed");
2263 #else
2264         if (ioctl(port->fd, TIOCCBRK, 1) < 0)
2265                 RETURN_FAIL("TIOCCBRK ioctl failed");
2266 #endif
2267
2268         RETURN_OK();
2269 }
2270
2271 SP_API int sp_last_error_code(void)
2272 {
2273         TRACE_VOID();
2274 #ifdef _WIN32
2275         RETURN_INT(GetLastError());
2276 #else
2277         RETURN_INT(errno);
2278 #endif
2279 }
2280
2281 SP_API char *sp_last_error_message(void)
2282 {
2283         TRACE_VOID();
2284
2285 #ifdef _WIN32
2286         LPVOID message;
2287         DWORD error = GetLastError();
2288
2289         FormatMessage(
2290                 FORMAT_MESSAGE_ALLOCATE_BUFFER |
2291                 FORMAT_MESSAGE_FROM_SYSTEM |
2292                 FORMAT_MESSAGE_IGNORE_INSERTS,
2293                 NULL,
2294                 error,
2295                 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
2296                 (LPTSTR) &message,
2297                 0, NULL );
2298
2299         RETURN_STRING(message);
2300 #else
2301         RETURN_STRING(strerror(errno));
2302 #endif
2303 }
2304
2305 SP_API void sp_free_error_message(char *message)
2306 {
2307         TRACE("%s", message);
2308
2309 #ifdef _WIN32
2310         LocalFree(message);
2311 #else
2312         (void)message;
2313 #endif
2314
2315         RETURN();
2316 }
2317
2318 SP_API void sp_set_debug_handler(void (*handler)(const char *format, ...))
2319 {
2320         TRACE("%p", handler);
2321
2322         sp_debug_handler = handler;
2323
2324         RETURN();
2325 }
2326
2327 SP_API void sp_default_debug_handler(const char *format, ...)
2328 {
2329         va_list args;
2330         va_start(args, format);
2331         if (getenv("LIBSERIALPORT_DEBUG")) {
2332                 fputs("sp: ", stderr);
2333                 vfprintf(stderr, format, args);
2334         }
2335         va_end(args);
2336 }
2337
2338 SP_API int sp_get_major_package_version(void)
2339 {
2340         return SP_PACKAGE_VERSION_MAJOR;
2341 }
2342
2343 SP_API int sp_get_minor_package_version(void)
2344 {
2345         return SP_PACKAGE_VERSION_MINOR;
2346 }
2347
2348 SP_API int sp_get_micro_package_version(void)
2349 {
2350         return SP_PACKAGE_VERSION_MICRO;
2351 }
2352
2353 SP_API const char *sp_get_package_version_string(void)
2354 {
2355         return SP_PACKAGE_VERSION_STRING;
2356 }
2357
2358 SP_API int sp_get_current_lib_version(void)
2359 {
2360         return SP_LIB_VERSION_CURRENT;
2361 }
2362
2363 SP_API int sp_get_revision_lib_version(void)
2364 {
2365         return SP_LIB_VERSION_REVISION;
2366 }
2367
2368 SP_API int sp_get_age_lib_version(void)
2369 {
2370         return SP_LIB_VERSION_AGE;
2371 }
2372
2373 SP_API const char *sp_get_lib_version_string(void)
2374 {
2375         return SP_LIB_VERSION_STRING;
2376 }
2377
2378 /** @} */