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