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(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(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
 238 #ifdef _WIN32
 239         HANDLE *handle_ptr = result_ptr;
 240         *handle_ptr = port->hdl;
 241 #else
 242         int *fd_ptr = result_ptr;
 243         *fd_ptr = port->fd;
 244 #endif
 245
 246         RETURN_OK();
 247 }
 248
 249 SP_API enum sp_return sp_copy_port(const struct sp_port *port,
 250                                    struct sp_port **copy_ptr)
 251 {
 252         TRACE("%p, %p", port, copy_ptr);
 253
 254         if (!copy_ptr)
 255                 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
 256
 257         *copy_ptr = NULL;
 258
 259         if (!port)
 260                 RETURN_ERROR(SP_ERR_ARG, "Null port");
 261
 262         if (!port->name)
 263                 RETURN_ERROR(SP_ERR_ARG, "Null port name");
 264
 265         DEBUG("Copying port structure");
 266
 267         RETURN_INT(sp_get_port_by_name(port->name, copy_ptr));
 268 }
 269
 270 SP_API void sp_free_port(struct sp_port *port)
 271 {
 272         TRACE("%p", port);
 273
 274         if (!port) {
 275                 DEBUG("Null port");
 276                 RETURN();
 277         }
 278
 279         DEBUG("Freeing port structure");
 280
 281         if (port->name)
 282                 free(port->name);
 283         if (port->description)
 284                 free(port->description);
 285         if (port->usb_manufacturer)
 286                 free(port->usb_manufacturer);
 287         if (port->usb_product)
 288                 free(port->usb_product);
 289         if (port->usb_serial)
 290                 free(port->usb_serial);
 291         if (port->bluetooth_address)
 292                 free(port->bluetooth_address);
 293 #ifdef _WIN32
 294         if (port->usb_path)
 295                 free(port->usb_path);
 296 #endif
 297
 298         free(port);
 299
 300         RETURN();
 301 }
 302
 303 SP_PRIV struct sp_port **list_append(struct sp_port **list,
 304                                      const char *portname)
 305 {
 306         void *tmp;
 307         unsigned int count;
 308
 309         for (count = 0; list[count]; count++);
 310         if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
 311                 goto fail;
 312         list = tmp;
 313         if (sp_get_port_by_name(portname, &list[count]) != SP_OK)
 314                 goto fail;
 315         list[count + 1] = NULL;
 316         return list;
 317
 318 fail:
 319         sp_free_port_list(list);
 320         return NULL;
 321 }
 322
 323 SP_API enum sp_return sp_list_ports(struct sp_port ***list_ptr)
 324 {
 325         struct sp_port **list;
 326         int ret;
 327
 328         TRACE("%p", list_ptr);
 329
 330         if (!list_ptr)
 331                 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
 332
 333         DEBUG("Enumerating ports");
 334
 335         if (!(list = malloc(sizeof(struct sp_port **))))
 336                 RETURN_ERROR(SP_ERR_MEM, "Port list malloc failed");
 337
 338         list[0] = NULL;
 339
 340 #ifdef NO_ENUMERATION
 341         ret = SP_ERR_SUPP;
 342 #else
 343         ret = list_ports(&list);
 344 #endif
 345
 346         switch (ret) {
 347         case SP_OK:
 348                 *list_ptr = list;
 349                 RETURN_OK();
 350         case SP_ERR_SUPP:
 351                 DEBUG_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform");
 352         default:
 353                 if (list)
 354                         sp_free_port_list(list);
 355                 *list_ptr = NULL;
 356                 return ret;
 357         }
 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)
 719 {
 720         TRACE("%p, %p, %d, %d", port, buf, count, timeout);
 721
 722         CHECK_OPEN_PORT();
 723
 724         if (!buf)
 725                 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
 726
 727         if (timeout)
 728                 DEBUG_FMT("Writing %d bytes to port %s, timeout %d ms",
 729                         count, port->name, timeout);
 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;
 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) {
 778                 /* Get time at start of operation. */
 779                 gettimeofday(&start, NULL);
 780                 /* Define duration of timeout. */
 781                 delta.tv_sec = timeout / 1000;
 782                 delta.tv_usec = (timeout % 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) {
 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 ? &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)
 916 {
 917         TRACE("%p, %p, %d, %d", port, buf, count, timeout);
 918
 919         CHECK_OPEN_PORT();
 920
 921         if (!buf)
 922                 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
 923
 924         if (timeout)
 925                 DEBUG_FMT("Reading %d bytes from port %s, timeout %d ms",
 926                         count, port->name, timeout);
 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;
 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) {
 980                 /* Get time at start of operation. */
 981                 gettimeofday(&start, NULL);
 982                 /* Define duration of timeout. */
 983                 delta.tv_sec = timeout / 1000;
 984                 delta.tv_usec = (timeout % 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) {
 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 ? &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         if (!(new_masks = realloc(event_set->masks,
1173                         sizeof(enum sp_event) * (event_set->count + 1))))
1174                 RETURN_ERROR(SP_ERR_MEM, "Mask array realloc() failed");
1175
1176         event_set->handles = new_handles;
1177         event_set->masks = new_masks;
1178
1179         ((event_handle *) event_set->handles)[event_set->count] = handle;
1180         event_set->masks[event_set->count] = mask;
1181
1182         event_set->count++;
1183
1184         RETURN_OK();
1185 }
1186
1187 SP_API enum sp_return sp_add_port_events(struct sp_event_set *event_set,
1188         const struct sp_port *port, enum sp_event mask)
1189 {
1190         TRACE("%p, %p, %d", event_set, port, mask);
1191
1192         if (!event_set)
1193                 RETURN_ERROR(SP_ERR_ARG, "Null event set");
1194
1195         if (!port)
1196                 RETURN_ERROR(SP_ERR_ARG, "Null port");
1197
1198         if (mask > (SP_EVENT_RX_READY | SP_EVENT_TX_READY | SP_EVENT_ERROR))
1199                 RETURN_ERROR(SP_ERR_ARG, "Invalid event mask");
1200
1201         if (!mask)
1202                 RETURN_OK();
1203
1204 #ifdef _WIN32
1205         enum sp_event handle_mask;
1206         if ((handle_mask = mask & SP_EVENT_TX_READY))
1207                 TRY(add_handle(event_set, port->write_ovl.hEvent, handle_mask));
1208         if ((handle_mask = mask & (SP_EVENT_RX_READY | SP_EVENT_ERROR)))
1209                 TRY(add_handle(event_set, port->wait_ovl.hEvent, handle_mask));
1210 #else
1211         TRY(add_handle(event_set, port->fd, mask));
1212 #endif
1213
1214         RETURN_OK();
1215 }
1216
1217 SP_API void sp_free_event_set(struct sp_event_set *event_set)
1218 {
1219         TRACE("%p", event_set);
1220
1221         if (!event_set) {
1222                 DEBUG("Null event set");
1223                 RETURN();
1224         }
1225
1226         DEBUG("Freeing event set");
1227
1228         if (event_set->handles)
1229                 free(event_set->handles);
1230         if (event_set->masks)
1231                 free(event_set->masks);
1232
1233         free(event_set);
1234
1235         RETURN();
1236 }
1237
1238 SP_API enum sp_return sp_wait(struct sp_event_set *event_set,
1239                               unsigned int timeout)
1240 {
1241         TRACE("%p, %d", event_set, timeout);
1242
1243         if (!event_set)
1244                 RETURN_ERROR(SP_ERR_ARG, "Null event set");
1245
1246 #ifdef _WIN32
1247         if (WaitForMultipleObjects(event_set->count, event_set->handles, FALSE,
1248                         timeout ? timeout : INFINITE) == WAIT_FAILED)
1249                 RETURN_FAIL("WaitForMultipleObjects() failed");
1250
1251         RETURN_OK();
1252 #else
1253         struct timeval start, delta, now, end = {0, 0};
1254         int result, timeout_remaining;
1255         struct pollfd *pollfds;
1256         unsigned int i;
1257
1258         if (!(pollfds = malloc(sizeof(struct pollfd) * event_set->count)))
1259                 RETURN_ERROR(SP_ERR_MEM, "pollfds malloc() failed");
1260
1261         for (i = 0; i < event_set->count; i++) {
1262                 pollfds[i].fd = ((int *) event_set->handles)[i];
1263                 pollfds[i].events = 0;
1264                 pollfds[i].revents = 0;
1265                 if (event_set->masks[i] & SP_EVENT_RX_READY)
1266                         pollfds[i].events |= POLLIN;
1267                 if (event_set->masks[i] & SP_EVENT_TX_READY)
1268                         pollfds[i].events |= POLLOUT;
1269                 if (event_set->masks[i] & SP_EVENT_ERROR)
1270                         pollfds[i].events |= POLLERR;
1271         }
1272
1273         if (timeout) {
1274                 /* Get time at start of operation. */
1275                 gettimeofday(&start, NULL);
1276                 /* Define duration of timeout. */
1277                 delta.tv_sec = timeout / 1000;
1278                 delta.tv_usec = (timeout % 1000) * 1000;
1279                 /* Calculate time at which we should give up. */
1280                 timeradd(&start, &delta, &end);
1281         }
1282
1283         /* Loop until an event occurs. */
1284         while (1) {
1285                 if (timeout) {
1286                         gettimeofday(&now, NULL);
1287                         if (timercmp(&now, &end, >)) {
1288                                 DEBUG("Wait timed out");
1289                                 break;
1290                         }
1291                         timersub(&end, &now, &delta);
1292                         timeout_remaining = delta.tv_sec * 1000 + delta.tv_usec / 1000;
1293                 }
1294
1295                 result = poll(pollfds, event_set->count, timeout ? timeout_remaining : -1);
1296
1297                 if (result < 0) {
1298                         if (errno == EINTR) {
1299                                 DEBUG("poll() call was interrupted, repeating");
1300                                 continue;
1301                         } else {
1302                                 free(pollfds);
1303                                 RETURN_FAIL("poll() failed");
1304                         }
1305                 } else if (result == 0) {
1306                         DEBUG("poll() timed out");
1307                         break;
1308                 } else {
1309                         DEBUG("poll() completed");
1310                         break;
1311                 }
1312         }
1313
1314         free(pollfds);
1315         RETURN_OK();
1316 #endif
1317 }
1318
1319 #ifdef USE_TERMIOS_SPEED
1320 static enum sp_return get_baudrate(int fd, int *baudrate)
1321 {
1322         void *data;
1323
1324         TRACE("%d, %p", fd, baudrate);
1325
1326         DEBUG("Getting baud rate");
1327
1328         if (!(data = malloc(get_termios_size())))
1329                 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
1330
1331         if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1332                 free(data);
1333                 RETURN_FAIL("Getting termios failed");
1334         }
1335
1336         *baudrate = get_termios_speed(data);
1337
1338         free(data);
1339
1340         RETURN_OK();
1341 }
1342
1343 static enum sp_return set_baudrate(int fd, int baudrate)
1344 {
1345         void *data;
1346
1347         TRACE("%d, %d", fd, baudrate);
1348
1349         DEBUG("Getting baud rate");
1350
1351         if (!(data = malloc(get_termios_size())))
1352                 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
1353
1354         if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1355                 free(data);
1356                 RETURN_FAIL("Getting termios failed");
1357         }
1358
1359         DEBUG("Setting baud rate");
1360
1361         set_termios_speed(data, baudrate);
1362
1363         if (ioctl(fd, get_termios_set_ioctl(), data) < 0) {
1364                 free(data);
1365                 RETURN_FAIL("Setting termios failed");
1366         }
1367
1368         free(data);
1369
1370         RETURN_OK();
1371 }
1372 #endif /* USE_TERMIOS_SPEED */
1373
1374 #ifdef USE_TERMIOX
1375 static enum sp_return get_flow(int fd, struct port_data *data)
1376 {
1377         void *termx;
1378
1379         TRACE("%d, %p", fd, data);
1380
1381         DEBUG("Getting advanced flow control");
1382
1383         if (!(termx = malloc(get_termiox_size())))
1384                 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
1385
1386         if (ioctl(fd, TCGETX, termx) < 0) {
1387                 free(termx);
1388                 RETURN_FAIL("Getting termiox failed");
1389         }
1390
1391         get_termiox_flow(termx, &data->rts_flow, &data->cts_flow,
1392                         &data->dtr_flow, &data->dsr_flow);
1393
1394         free(termx);
1395
1396         RETURN_OK();
1397 }
1398
1399 static enum sp_return set_flow(int fd, struct port_data *data)
1400 {
1401         void *termx;
1402
1403         TRACE("%d, %p", fd, data);
1404
1405         DEBUG("Getting advanced flow control");
1406
1407         if (!(termx = malloc(get_termiox_size())))
1408                 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
1409
1410         if (ioctl(fd, TCGETX, termx) < 0) {
1411                 free(termx);
1412                 RETURN_FAIL("Getting termiox failed");
1413         }
1414
1415         DEBUG("Setting advanced flow control");
1416
1417         set_termiox_flow(termx, data->rts_flow, data->cts_flow,
1418                         data->dtr_flow, data->dsr_flow);
1419
1420         if (ioctl(fd, TCSETX, termx) < 0) {
1421                 free(termx);
1422                 RETURN_FAIL("Setting termiox failed");
1423         }
1424
1425         free(termx);
1426
1427         RETURN_OK();
1428 }
1429 #endif /* USE_TERMIOX */
1430
1431 static enum sp_return get_config(struct sp_port *port, struct port_data *data,
1432         struct sp_port_config *config)
1433 {
1434         unsigned int i;
1435
1436         TRACE("%p, %p, %p", port, data, config);
1437
1438         DEBUG_FMT("Getting configuration for port %s", port->name);
1439
1440 #ifdef _WIN32
1441         if (!GetCommState(port->hdl, &data->dcb))
1442                 RETURN_FAIL("GetCommState() failed");
1443
1444         for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1445                 if (data->dcb.BaudRate == std_baudrates[i].index) {
1446                         config->baudrate = std_baudrates[i].value;
1447                         break;
1448                 }
1449         }
1450
1451         if (i == NUM_STD_BAUDRATES)
1452                 /* BaudRate field can be either an index or a custom baud rate. */
1453                 config->baudrate = data->dcb.BaudRate;
1454
1455         config->bits = data->dcb.ByteSize;
1456
1457         if (data->dcb.fParity)
1458                 switch (data->dcb.Parity) {
1459                 case NOPARITY:
1460                         config->parity = SP_PARITY_NONE;
1461                         break;
1462                 case ODDPARITY:
1463                         config->parity = SP_PARITY_ODD;
1464                         break;
1465                 case EVENPARITY:
1466                         config->parity = SP_PARITY_EVEN;
1467                         break;
1468                 case MARKPARITY:
1469                         config->parity = SP_PARITY_MARK;
1470                         break;
1471                 case SPACEPARITY:
1472                         config->parity = SP_PARITY_SPACE;
1473                         break;
1474                 default:
1475                         config->parity = -1;
1476                 }
1477         else
1478                 config->parity = SP_PARITY_NONE;
1479
1480         switch (data->dcb.StopBits) {
1481         case ONESTOPBIT:
1482                 config->stopbits = 1;
1483                 break;
1484         case TWOSTOPBITS:
1485                 config->stopbits = 2;
1486                 break;
1487         default:
1488                 config->stopbits = -1;
1489         }
1490
1491         switch (data->dcb.fRtsControl) {
1492         case RTS_CONTROL_DISABLE:
1493                 config->rts = SP_RTS_OFF;
1494                 break;
1495         case RTS_CONTROL_ENABLE:
1496                 config->rts = SP_RTS_ON;
1497                 break;
1498         case RTS_CONTROL_HANDSHAKE:
1499                 config->rts = SP_RTS_FLOW_CONTROL;
1500                 break;
1501         default:
1502                 config->rts = -1;
1503         }
1504
1505         config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
1506
1507         switch (data->dcb.fDtrControl) {
1508         case DTR_CONTROL_DISABLE:
1509                 config->dtr = SP_DTR_OFF;
1510                 break;
1511         case DTR_CONTROL_ENABLE:
1512                 config->dtr = SP_DTR_ON;
1513                 break;
1514         case DTR_CONTROL_HANDSHAKE:
1515                 config->dtr = SP_DTR_FLOW_CONTROL;
1516                 break;
1517         default:
1518                 config->dtr = -1;
1519         }
1520
1521         config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
1522
1523         if (data->dcb.fInX) {
1524                 if (data->dcb.fOutX)
1525                         config->xon_xoff = SP_XONXOFF_INOUT;
1526                 else
1527                         config->xon_xoff = SP_XONXOFF_IN;
1528         } else {
1529                 if (data->dcb.fOutX)
1530                         config->xon_xoff = SP_XONXOFF_OUT;
1531                 else
1532                         config->xon_xoff = SP_XONXOFF_DISABLED;
1533         }
1534
1535 #else // !_WIN32
1536
1537         if (tcgetattr(port->fd, &data->term) < 0)
1538                 RETURN_FAIL("tcgetattr() failed");
1539
1540         if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
1541                 RETURN_FAIL("TIOCMGET ioctl failed");
1542
1543 #ifdef USE_TERMIOX
1544         int ret = get_flow(port->fd, data);
1545
1546         if (ret == SP_ERR_FAIL && errno == EINVAL)
1547                 data->termiox_supported = 0;
1548         else if (ret < 0)
1549                 RETURN_CODEVAL(ret);
1550         else
1551                 data->termiox_supported = 1;
1552 #else
1553         data->termiox_supported = 0;
1554 #endif
1555
1556         for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1557                 if (cfgetispeed(&data->term) == std_baudrates[i].index) {
1558                         config->baudrate = std_baudrates[i].value;
1559                         break;
1560                 }
1561         }
1562
1563         if (i == NUM_STD_BAUDRATES) {
1564 #ifdef __APPLE__
1565                 config->baudrate = (int)data->term.c_ispeed;
1566 #elif defined(USE_TERMIOS_SPEED)
1567                 TRY(get_baudrate(port->fd, &config->baudrate));
1568 #else
1569                 config->baudrate = -1;
1570 #endif
1571         }
1572
1573         switch (data->term.c_cflag & CSIZE) {
1574         case CS8:
1575                 config->bits = 8;
1576                 break;
1577         case CS7:
1578                 config->bits = 7;
1579                 break;
1580         case CS6:
1581                 config->bits = 6;
1582                 break;
1583         case CS5:
1584                 config->bits = 5;
1585                 break;
1586         default:
1587                 config->bits = -1;
1588         }
1589
1590         if (!(data->term.c_cflag & PARENB) && (data->term.c_iflag & IGNPAR))
1591                 config->parity = SP_PARITY_NONE;
1592         else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR))
1593                 config->parity = -1;
1594 #ifdef CMSPAR
1595         else if (data->term.c_cflag & CMSPAR)
1596                 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_MARK : SP_PARITY_SPACE;
1597 #endif
1598         else
1599                 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
1600
1601         config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1;
1602
1603         if (data->term.c_cflag & CRTSCTS) {
1604                 config->rts = SP_RTS_FLOW_CONTROL;
1605                 config->cts = SP_CTS_FLOW_CONTROL;
1606         } else {
1607                 if (data->termiox_supported && data->rts_flow)
1608                         config->rts = SP_RTS_FLOW_CONTROL;
1609                 else
1610                         config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
1611
1612                 config->cts = (data->termiox_supported && data->cts_flow) ?
1613                         SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
1614         }
1615
1616         if (data->termiox_supported && data->dtr_flow)
1617                 config->dtr = SP_DTR_FLOW_CONTROL;
1618         else
1619                 config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
1620
1621         config->dsr = (data->termiox_supported && data->dsr_flow) ?
1622                 SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
1623
1624         if (data->term.c_iflag & IXOFF) {
1625                 if (data->term.c_iflag & IXON)
1626                         config->xon_xoff = SP_XONXOFF_INOUT;
1627                 else
1628                         config->xon_xoff = SP_XONXOFF_IN;
1629         } else {
1630                 if (data->term.c_iflag & IXON)
1631                         config->xon_xoff = SP_XONXOFF_OUT;
1632                 else
1633                         config->xon_xoff = SP_XONXOFF_DISABLED;
1634         }
1635 #endif
1636
1637         RETURN_OK();
1638 }
1639
1640 static enum sp_return set_config(struct sp_port *port, struct port_data *data,
1641         const struct sp_port_config *config)
1642 {
1643         unsigned int i;
1644 #ifdef __APPLE__
1645         BAUD_TYPE baud_nonstd;
1646
1647         baud_nonstd = B0;
1648 #endif
1649 #ifdef USE_TERMIOS_SPEED
1650         int baud_nonstd = 0;
1651 #endif
1652
1653         TRACE("%p, %p, %p", port, data, config);
1654
1655         DEBUG_FMT("Setting configuration for port %s", port->name);
1656
1657 #ifdef _WIN32
1658         if (config->baudrate >= 0) {
1659                 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1660                         if (config->baudrate == std_baudrates[i].value) {
1661                                 data->dcb.BaudRate = std_baudrates[i].index;
1662                                 break;
1663                         }
1664                 }
1665
1666                 if (i == NUM_STD_BAUDRATES)
1667                         data->dcb.BaudRate = config->baudrate;
1668         }
1669
1670         if (config->bits >= 0)
1671                 data->dcb.ByteSize = config->bits;
1672
1673         if (config->parity >= 0) {
1674                 switch (config->parity) {
1675                 case SP_PARITY_NONE:
1676                         data->dcb.Parity = NOPARITY;
1677                         break;
1678                 case SP_PARITY_ODD:
1679                         data->dcb.Parity = ODDPARITY;
1680                         break;
1681                 case SP_PARITY_EVEN:
1682                         data->dcb.Parity = EVENPARITY;
1683                         break;
1684                 case SP_PARITY_MARK:
1685                         data->dcb.Parity = MARKPARITY;
1686                         break;
1687                 case SP_PARITY_SPACE:
1688                         data->dcb.Parity = SPACEPARITY;
1689                         break;
1690                 default:
1691                         RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
1692                 }
1693         }
1694
1695         if (config->stopbits >= 0) {
1696                 switch (config->stopbits) {
1697                 /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
1698                 case 1:
1699                         data->dcb.StopBits = ONESTOPBIT;
1700                         break;
1701                 case 2:
1702                         data->dcb.StopBits = TWOSTOPBITS;
1703                         break;
1704                 default:
1705                         RETURN_ERROR(SP_ERR_ARG, "Invalid stop bit setting");
1706                 }
1707         }
1708
1709         if (config->rts >= 0) {
1710                 switch (config->rts) {
1711                 case SP_RTS_OFF:
1712                         data->dcb.fRtsControl = RTS_CONTROL_DISABLE;
1713                         break;
1714                 case SP_RTS_ON:
1715                         data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
1716                         break;
1717                 case SP_RTS_FLOW_CONTROL:
1718                         data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
1719                         break;
1720                 default:
1721                         RETURN_ERROR(SP_ERR_ARG, "Invalid RTS setting");
1722                 }
1723         }
1724
1725         if (config->cts >= 0) {
1726                 switch (config->cts) {
1727                 case SP_CTS_IGNORE:
1728                         data->dcb.fOutxCtsFlow = FALSE;
1729                         break;
1730                 case SP_CTS_FLOW_CONTROL:
1731                         data->dcb.fOutxCtsFlow = TRUE;
1732                         break;
1733                 default:
1734                         RETURN_ERROR(SP_ERR_ARG, "Invalid CTS setting");
1735                 }
1736         }
1737
1738         if (config->dtr >= 0) {
1739                 switch (config->dtr) {
1740                 case SP_DTR_OFF:
1741                         data->dcb.fDtrControl = DTR_CONTROL_DISABLE;
1742                         break;
1743                 case SP_DTR_ON:
1744                         data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
1745                         break;
1746                 case SP_DTR_FLOW_CONTROL:
1747                         data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
1748                         break;
1749                 default:
1750                         RETURN_ERROR(SP_ERR_ARG, "Invalid DTR setting");
1751                 }
1752         }
1753
1754         if (config->dsr >= 0) {
1755                 switch (config->dsr) {
1756                 case SP_DSR_IGNORE:
1757                         data->dcb.fOutxDsrFlow = FALSE;
1758                         break;
1759                 case SP_DSR_FLOW_CONTROL:
1760                         data->dcb.fOutxDsrFlow = TRUE;
1761                         break;
1762                 default:
1763                         RETURN_ERROR(SP_ERR_ARG, "Invalid DSR setting");
1764                 }
1765         }
1766
1767         if (config->xon_xoff >= 0) {
1768                 switch (config->xon_xoff) {
1769                 case SP_XONXOFF_DISABLED:
1770                         data->dcb.fInX = FALSE;
1771                         data->dcb.fOutX = FALSE;
1772                         break;
1773                 case SP_XONXOFF_IN:
1774                         data->dcb.fInX = TRUE;
1775                         data->dcb.fOutX = FALSE;
1776                         break;
1777                 case SP_XONXOFF_OUT:
1778                         data->dcb.fInX = FALSE;
1779                         data->dcb.fOutX = TRUE;
1780                         break;
1781                 case SP_XONXOFF_INOUT:
1782                         data->dcb.fInX = TRUE;
1783                         data->dcb.fOutX = TRUE;
1784                         break;
1785                 default:
1786                         RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
1787                 }
1788         }
1789
1790         if (!SetCommState(port->hdl, &data->dcb))
1791                 RETURN_FAIL("SetCommState() failed");
1792
1793 #else /* !_WIN32 */
1794
1795         int controlbits;
1796
1797         if (config->baudrate >= 0) {
1798                 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1799                         if (config->baudrate == std_baudrates[i].value) {
1800                                 if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
1801                                         RETURN_FAIL("cfsetospeed() failed");
1802
1803                                 if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
1804                                         RETURN_FAIL("cfsetispeed() failed");
1805                                 break;
1806                         }
1807                 }
1808
1809                 /* Non-standard baud rate */
1810                 if (i == NUM_STD_BAUDRATES) {
1811 #ifdef __APPLE__
1812                         /* Set "dummy" baud rate. */
1813                         if (cfsetspeed(&data->term, B9600) < 0)
1814                                 RETURN_FAIL("cfsetspeed() failed");
1815                         baud_nonstd = config->baudrate;
1816 #elif defined(USE_TERMIOS_SPEED)
1817                         baud_nonstd = 1;
1818 #else
1819                         RETURN_ERROR(SP_ERR_SUPP, "Non-standard baudrate not supported");
1820 #endif
1821                 }
1822         }
1823
1824         if (config->bits >= 0) {
1825                 data->term.c_cflag &= ~CSIZE;
1826                 switch (config->bits) {
1827                 case 8:
1828                         data->term.c_cflag |= CS8;
1829                         break;
1830                 case 7:
1831                         data->term.c_cflag |= CS7;
1832                         break;
1833                 case 6:
1834                         data->term.c_cflag |= CS6;
1835                         break;
1836                 case 5:
1837                         data->term.c_cflag |= CS5;
1838                         break;
1839                 default:
1840                         RETURN_ERROR(SP_ERR_ARG, "Invalid data bits setting");
1841                 }
1842         }
1843
1844         if (config->parity >= 0) {
1845                 data->term.c_iflag &= ~IGNPAR;
1846                 data->term.c_cflag &= ~(PARENB | PARODD);
1847 #ifdef CMSPAR
1848                 data->term.c_cflag &= ~CMSPAR;
1849 #endif
1850                 switch (config->parity) {
1851                 case SP_PARITY_NONE:
1852                         data->term.c_iflag |= IGNPAR;
1853                         break;
1854                 case SP_PARITY_EVEN:
1855                         data->term.c_cflag |= PARENB;
1856                         break;
1857                 case SP_PARITY_ODD:
1858                         data->term.c_cflag |= PARENB | PARODD;
1859                         break;
1860 #ifdef CMSPAR
1861                 case SP_PARITY_MARK:
1862                         data->term.c_cflag |= PARENB | PARODD;
1863                         data->term.c_cflag |= CMSPAR;
1864                         break;
1865                 case SP_PARITY_SPACE:
1866                         data->term.c_cflag |= PARENB;
1867                         data->term.c_cflag |= CMSPAR;
1868                         break;
1869 #else
1870                 case SP_PARITY_MARK:
1871                 case SP_PARITY_SPACE:
1872                         RETURN_ERROR(SP_ERR_SUPP, "Mark/space parity not supported");
1873 #endif
1874                 default:
1875                         RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
1876                 }
1877         }
1878
1879         if (config->stopbits >= 0) {
1880                 data->term.c_cflag &= ~CSTOPB;
1881                 switch (config->stopbits) {
1882                 case 1:
1883                         data->term.c_cflag &= ~CSTOPB;
1884                         break;
1885                 case 2:
1886                         data->term.c_cflag |= CSTOPB;
1887                         break;
1888                 default:
1889                         RETURN_ERROR(SP_ERR_ARG, "Invalid stop bits setting");
1890                 }
1891         }
1892
1893         if (config->rts >= 0 || config->cts >= 0) {
1894                 if (data->termiox_supported) {
1895                         data->rts_flow = data->cts_flow = 0;
1896                         switch (config->rts) {
1897                         case SP_RTS_OFF:
1898                         case SP_RTS_ON:
1899                                 controlbits = TIOCM_RTS;
1900                                 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
1901                                         RETURN_FAIL("Setting RTS signal level failed");
1902                                 break;
1903                         case SP_RTS_FLOW_CONTROL:
1904                                 data->rts_flow = 1;
1905                                 break;
1906                         default:
1907                                 break;
1908                         }
1909                         if (config->cts == SP_CTS_FLOW_CONTROL)
1910                                 data->cts_flow = 1;
1911
1912                         if (data->rts_flow && data->cts_flow)
1913                                 data->term.c_iflag |= CRTSCTS;
1914                         else
1915                                 data->term.c_iflag &= ~CRTSCTS;
1916                 } else {
1917                         /* Asymmetric use of RTS/CTS not supported. */
1918                         if (data->term.c_iflag & CRTSCTS) {
1919                                 /* Flow control can only be disabled for both RTS & CTS together. */
1920                                 if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
1921                                         if (config->cts != SP_CTS_IGNORE)
1922                                                 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
1923                                 }
1924                                 if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
1925                                         if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
1926                                                 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
1927                                 }
1928                         } else {
1929                                 /* Flow control can only be enabled for both RTS & CTS together. */
1930                                 if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
1931                                         ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
1932                                         RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be enabled together");
1933                         }
1934
1935                         if (config->rts >= 0) {
1936                                 if (config->rts == SP_RTS_FLOW_CONTROL) {
1937                                         data->term.c_iflag |= CRTSCTS;
1938                                 } else {
1939                                         controlbits = TIOCM_RTS;
1940                                         if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
1941                                                         &controlbits) < 0)
1942                                                 RETURN_FAIL("Setting RTS signal level failed");
1943                                 }
1944                         }
1945                 }
1946         }
1947
1948         if (config->dtr >= 0 || config->dsr >= 0) {
1949                 if (data->termiox_supported) {
1950                         data->dtr_flow = data->dsr_flow = 0;
1951                         switch (config->dtr) {
1952                         case SP_DTR_OFF:
1953                         case SP_DTR_ON:
1954                                 controlbits = TIOCM_DTR;
1955                                 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
1956                                         RETURN_FAIL("Setting DTR signal level failed");
1957                                 break;
1958                         case SP_DTR_FLOW_CONTROL:
1959                                 data->dtr_flow = 1;
1960                                 break;
1961                         default:
1962                                 break;
1963                         }
1964                         if (config->dsr == SP_DSR_FLOW_CONTROL)
1965                                 data->dsr_flow = 1;
1966                 } else {
1967                         /* DTR/DSR flow control not supported. */
1968                         if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
1969                                 RETURN_ERROR(SP_ERR_SUPP, "DTR/DSR flow control not supported");
1970
1971                         if (config->dtr >= 0) {
1972                                 controlbits = TIOCM_DTR;
1973                                 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
1974                                                 &controlbits) < 0)
1975                                         RETURN_FAIL("Setting DTR signal level failed");
1976                         }
1977                 }
1978         }
1979
1980         if (config->xon_xoff >= 0) {
1981                 data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
1982                 switch (config->xon_xoff) {
1983                 case SP_XONXOFF_DISABLED:
1984                         break;
1985                 case SP_XONXOFF_IN:
1986                         data->term.c_iflag |= IXOFF;
1987                         break;
1988                 case SP_XONXOFF_OUT:
1989                         data->term.c_iflag |= IXON | IXANY;
1990                         break;
1991                 case SP_XONXOFF_INOUT:
1992                         data->term.c_iflag |= IXON | IXOFF | IXANY;
1993                         break;
1994                 default:
1995                         RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
1996                 }
1997         }
1998
1999         if (tcsetattr(port->fd, TCSANOW, &data->term) < 0)
2000                 RETURN_FAIL("tcsetattr() failed");
2001
2002 #ifdef __APPLE__
2003         if (baud_nonstd != B0) {
2004                 if (ioctl(port->fd, IOSSIOSPEED, &baud_nonstd) == -1)
2005                         RETURN_FAIL("IOSSIOSPEED ioctl failed");
2006                 /*
2007                  * Set baud rates in data->term to correct, but incompatible
2008                  * with tcsetattr() value, same as delivered by tcgetattr().
2009                  */
2010                 if (cfsetspeed(&data->term, baud_nonstd) < 0)
2011                         RETURN_FAIL("cfsetspeed() failed");
2012         }
2013 #elif defined(__linux__)
2014 #ifdef USE_TERMIOS_SPEED
2015         if (baud_nonstd)
2016                 TRY(set_baudrate(port->fd, config->baudrate));
2017 #endif
2018 #ifdef USE_TERMIOX
2019         if (data->termiox_supported)
2020                 TRY(set_flow(port->fd, data));
2021 #endif
2022 #endif
2023
2024 #endif /* !_WIN32 */
2025
2026         RETURN_OK();
2027 }
2028
2029 SP_API enum sp_return sp_new_config(struct sp_port_config **config_ptr)
2030 {
2031         struct sp_port_config *config;
2032
2033         TRACE("%p", config_ptr);
2034
2035         if (!config_ptr)
2036                 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
2037
2038         *config_ptr = NULL;
2039
2040         if (!(config = malloc(sizeof(struct sp_port_config))))
2041                 RETURN_ERROR(SP_ERR_MEM, "Config malloc failed");
2042
2043         config->baudrate = -1;
2044         config->bits = -1;
2045         config->parity = -1;
2046         config->stopbits = -1;
2047         config->rts = -1;
2048         config->cts = -1;
2049         config->dtr = -1;
2050         config->dsr = -1;
2051
2052         *config_ptr = config;
2053
2054         RETURN_OK();
2055 }
2056
2057 SP_API void sp_free_config(struct sp_port_config *config)
2058 {
2059         TRACE("%p", config);
2060
2061         if (!config)
2062                 DEBUG("Null config");
2063         else
2064                 free(config);
2065
2066         RETURN();
2067 }
2068
2069 SP_API enum sp_return sp_get_config(struct sp_port *port,
2070                                     struct sp_port_config *config)
2071 {
2072         struct port_data data;
2073
2074         TRACE("%p, %p", port, config);
2075
2076         CHECK_OPEN_PORT();
2077
2078         if (!config)
2079                 RETURN_ERROR(SP_ERR_ARG, "Null config");
2080
2081         TRY(get_config(port, &data, config));
2082
2083         RETURN_OK();
2084 }
2085
2086 SP_API enum sp_return sp_set_config(struct sp_port *port,
2087                                     const struct sp_port_config *config)
2088 {
2089         struct port_data data;
2090         struct sp_port_config prev_config;
2091
2092         TRACE("%p, %p", port, config);
2093
2094         CHECK_OPEN_PORT();
2095
2096         if (!config)
2097                 RETURN_ERROR(SP_ERR_ARG, "Null config");
2098
2099         TRY(get_config(port, &data, &prev_config));
2100         TRY(set_config(port, &data, config));
2101
2102         RETURN_OK();
2103 }
2104
2105 #define CREATE_ACCESSORS(x, type) \
2106 SP_API enum sp_return sp_set_##x(struct sp_port *port, type x) { \
2107         struct port_data data; \
2108         struct sp_port_config config; \
2109         TRACE("%p, %d", port, x); \
2110         CHECK_OPEN_PORT(); \
2111         TRY(get_config(port, &data, &config)); \
2112         config.x = x; \
2113         TRY(set_config(port, &data, &config)); \
2114         RETURN_OK(); \
2115 } \
2116 SP_API enum sp_return sp_get_config_##x(const struct sp_port_config *config, \
2117                                         type *x) { \
2118         TRACE("%p, %p", config, x); \
2119         if (!config) \
2120                 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
2121         *x = config->x; \
2122         RETURN_OK(); \
2123 } \
2124 SP_API enum sp_return sp_set_config_##x(struct sp_port_config *config, \
2125                                         type x) { \
2126         TRACE("%p, %d", config, x); \
2127         if (!config) \
2128                 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
2129         config->x = x; \
2130         RETURN_OK(); \
2131 }
2132
2133 CREATE_ACCESSORS(baudrate, int)
2134 CREATE_ACCESSORS(bits, int)
2135 CREATE_ACCESSORS(parity, enum sp_parity)
2136 CREATE_ACCESSORS(stopbits, int)
2137 CREATE_ACCESSORS(rts, enum sp_rts)
2138 CREATE_ACCESSORS(cts, enum sp_cts)
2139 CREATE_ACCESSORS(dtr, enum sp_dtr)
2140 CREATE_ACCESSORS(dsr, enum sp_dsr)
2141 CREATE_ACCESSORS(xon_xoff, enum sp_xonxoff)
2142
2143 SP_API enum sp_return sp_set_config_flowcontrol(struct sp_port_config *config,
2144                                                 enum sp_flowcontrol flowcontrol)
2145 {
2146         if (!config)
2147                 RETURN_ERROR(SP_ERR_ARG, "Null configuration");
2148
2149         if (flowcontrol > SP_FLOWCONTROL_DTRDSR)
2150                 RETURN_ERROR(SP_ERR_ARG, "Invalid flow control setting");
2151
2152         if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
2153                 config->xon_xoff = SP_XONXOFF_INOUT;
2154         else
2155                 config->xon_xoff = SP_XONXOFF_DISABLED;
2156
2157         if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
2158                 config->rts = SP_RTS_FLOW_CONTROL;
2159                 config->cts = SP_CTS_FLOW_CONTROL;
2160         } else {
2161                 if (config->rts == SP_RTS_FLOW_CONTROL)
2162                         config->rts = SP_RTS_ON;
2163                 config->cts = SP_CTS_IGNORE;
2164         }
2165
2166         if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
2167                 config->dtr = SP_DTR_FLOW_CONTROL;
2168                 config->dsr = SP_DSR_FLOW_CONTROL;
2169         } else {
2170                 if (config->dtr == SP_DTR_FLOW_CONTROL)
2171                         config->dtr = SP_DTR_ON;
2172                 config->dsr = SP_DSR_IGNORE;
2173         }
2174
2175         RETURN_OK();
2176 }
2177
2178 SP_API enum sp_return sp_set_flowcontrol(struct sp_port *port,
2179                                          enum sp_flowcontrol flowcontrol)
2180 {
2181         struct port_data data;
2182         struct sp_port_config config;
2183
2184         TRACE("%p, %d", port, flowcontrol);
2185
2186         CHECK_OPEN_PORT();
2187
2188         TRY(get_config(port, &data, &config));
2189
2190         TRY(sp_set_config_flowcontrol(&config, flowcontrol));
2191
2192         TRY(set_config(port, &data, &config));
2193
2194         RETURN_OK();
2195 }
2196
2197 SP_API enum sp_return sp_get_signals(struct sp_port *port,
2198                                      enum sp_signal *signals)
2199 {
2200         TRACE("%p, %p", port, signals);
2201
2202         CHECK_OPEN_PORT();
2203
2204         if (!signals)
2205                 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
2206
2207         DEBUG_FMT("Getting control signals for port %s", port->name);
2208
2209         *signals = 0;
2210 #ifdef _WIN32
2211         DWORD bits;
2212         if (GetCommModemStatus(port->hdl, &bits) == 0)
2213                 RETURN_FAIL("GetCommModemStatus() failed");
2214         if (bits & MS_CTS_ON)
2215                 *signals |= SP_SIG_CTS;
2216         if (bits & MS_DSR_ON)
2217                 *signals |= SP_SIG_DSR;
2218         if (bits & MS_RLSD_ON)
2219                 *signals |= SP_SIG_DCD;
2220         if (bits & MS_RING_ON)
2221                 *signals |= SP_SIG_RI;
2222 #else
2223         int bits;
2224         if (ioctl(port->fd, TIOCMGET, &bits) < 0)
2225                 RETURN_FAIL("TIOCMGET ioctl failed");
2226         if (bits & TIOCM_CTS)
2227                 *signals |= SP_SIG_CTS;
2228         if (bits & TIOCM_DSR)
2229                 *signals |= SP_SIG_DSR;
2230         if (bits & TIOCM_CAR)
2231                 *signals |= SP_SIG_DCD;
2232         if (bits & TIOCM_RNG)
2233                 *signals |= SP_SIG_RI;
2234 #endif
2235         RETURN_OK();
2236 }
2237
2238 SP_API enum sp_return sp_start_break(struct sp_port *port)
2239 {
2240         TRACE("%p", port);
2241
2242         CHECK_OPEN_PORT();
2243 #ifdef _WIN32
2244         if (SetCommBreak(port->hdl) == 0)
2245                 RETURN_FAIL("SetCommBreak() failed");
2246 #else
2247         if (ioctl(port->fd, TIOCSBRK, 1) < 0)
2248                 RETURN_FAIL("TIOCSBRK ioctl failed");
2249 #endif
2250
2251         RETURN_OK();
2252 }
2253
2254 SP_API enum sp_return sp_end_break(struct sp_port *port)
2255 {
2256         TRACE("%p", port);
2257
2258         CHECK_OPEN_PORT();
2259 #ifdef _WIN32
2260         if (ClearCommBreak(port->hdl) == 0)
2261                 RETURN_FAIL("ClearCommBreak() failed");
2262 #else
2263         if (ioctl(port->fd, TIOCCBRK, 1) < 0)
2264                 RETURN_FAIL("TIOCCBRK ioctl failed");
2265 #endif
2266
2267         RETURN_OK();
2268 }
2269
2270 SP_API int sp_last_error_code(void)
2271 {
2272         TRACE_VOID();
2273 #ifdef _WIN32
2274         RETURN_INT(GetLastError());
2275 #else
2276         RETURN_INT(errno);
2277 #endif
2278 }
2279
2280 SP_API char *sp_last_error_message(void)
2281 {
2282         TRACE_VOID();
2283
2284 #ifdef _WIN32
2285         LPVOID message;
2286         DWORD error = GetLastError();
2287
2288         FormatMessage(
2289                 FORMAT_MESSAGE_ALLOCATE_BUFFER |
2290                 FORMAT_MESSAGE_FROM_SYSTEM |
2291                 FORMAT_MESSAGE_IGNORE_INSERTS,
2292                 NULL,
2293                 error,
2294                 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
2295                 (LPTSTR) &message,
2296                 0, NULL );
2297
2298         RETURN_STRING(message);
2299 #else
2300         RETURN_STRING(strerror(errno));
2301 #endif
2302 }
2303
2304 SP_API void sp_free_error_message(char *message)
2305 {
2306         TRACE("%s", message);
2307
2308 #ifdef _WIN32
2309         LocalFree(message);
2310 #else
2311         (void)message;
2312 #endif
2313
2314         RETURN();
2315 }
2316
2317 SP_API void sp_set_debug_handler(void (*handler)(const char *format, ...))
2318 {
2319         TRACE("%p", handler);
2320
2321         sp_debug_handler = handler;
2322
2323         RETURN();
2324 }
2325
2326 SP_API void sp_default_debug_handler(const char *format, ...)
2327 {
2328         va_list args;
2329         va_start(args, format);
2330         if (getenv("LIBSERIALPORT_DEBUG")) {
2331                 fputs("sp: ", stderr);
2332                 vfprintf(stderr, format, args);
2333         }
2334         va_end(args);
2335 }
2336
2337 SP_API int sp_get_major_package_version(void)
2338 {
2339         return SP_PACKAGE_VERSION_MAJOR;
2340 }
2341
2342 SP_API int sp_get_minor_package_version(void)
2343 {
2344         return SP_PACKAGE_VERSION_MINOR;
2345 }
2346
2347 SP_API int sp_get_micro_package_version(void)
2348 {
2349         return SP_PACKAGE_VERSION_MICRO;
2350 }
2351
2352 SP_API const char *sp_get_package_version_string(void)
2353 {
2354         return SP_PACKAGE_VERSION_STRING;
2355 }
2356
2357 SP_API int sp_get_current_lib_version(void)
2358 {
2359         return SP_LIB_VERSION_CURRENT;
2360 }
2361
2362 SP_API int sp_get_revision_lib_version(void)
2363 {
2364         return SP_LIB_VERSION_REVISION;
2365 }
2366
2367 SP_API int sp_get_age_lib_version(void)
2368 {
2369         return SP_LIB_VERSION_AGE;
2370 }
2371
2372 SP_API const char *sp_get_lib_version_string(void)
2373 {
2374         return SP_LIB_VERSION_STRING;
2375 }
2376
2377 /** @} */