qemu-char.c

   1 /*
   2  * QEMU System Emulator
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "qemu-common.h"
  25 #include "net.h"
  26 #include "monitor.h"
  27 #include "console.h"
  28 #include "sysemu.h"
  29 #include "qemu-timer.h"
  30 #include "qemu-char.h"
  31 #include "hw/usb.h"
  32 #include "hw/baum.h"
  33 #include "hw/msmouse.h"
  34 #include "qemu-objects.h"
  35
  36 #include <unistd.h>
  37 #include <fcntl.h>
  38 #include <time.h>
  39 #include <errno.h>
  40 #include <sys/time.h>
  41 #include <zlib.h>
  42
  43 #ifndef _WIN32
  44 #include <sys/times.h>
  45 #include <sys/wait.h>
  46 #include <termios.h>
  47 #include <sys/mman.h>
  48 #include <sys/ioctl.h>
  49 #include <sys/resource.h>
  50 #include <sys/socket.h>
  51 #include <netinet/in.h>
  52 #include <net/if.h>
  53 #include <arpa/inet.h>
  54 #include <dirent.h>
  55 #include <netdb.h>
  56 #include <sys/select.h>
  57 #ifdef CONFIG_BSD
  58 #include <sys/stat.h>
  59 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  60 #include <libutil.h>
  61 #include <dev/ppbus/ppi.h>
  62 #include <dev/ppbus/ppbconf.h>
  63 #if defined(__GLIBC__)
  64 #include <pty.h>
  65 #endif
  66 #elif defined(__DragonFly__)
  67 #include <libutil.h>
  68 #include <dev/misc/ppi/ppi.h>
  69 #include <bus/ppbus/ppbconf.h>
  70 #else
  71 #include <util.h>
  72 #endif
  73 #else
  74 #ifdef __linux__
  75 #include <pty.h>
  76
  77 #include <linux/ppdev.h>
  78 #include <linux/parport.h>
  79 #endif
  80 #ifdef __sun__
  81 #include <sys/stat.h>
  82 #include <sys/ethernet.h>
  83 #include <sys/sockio.h>
  84 #include <netinet/arp.h>
  85 #include <netinet/in.h>
  86 #include <netinet/in_systm.h>
  87 #include <netinet/ip.h>
  88 #include <netinet/ip_icmp.h> // must come after ip.h
  89 #include <netinet/udp.h>
  90 #include <netinet/tcp.h>
  91 #include <net/if.h>
  92 #include <syslog.h>
  93 #include <stropts.h>
  94 #endif
  95 #endif
  96 #endif
  97
  98 #include "qemu_socket.h"
  99 #include "ui/qemu-spice.h"
 100
 101 #define READ_BUF_LEN 4096
 102
 103 int term_escape_char = 0x01; /* ctrl-a is used for escape */
 104
 105 /***********************************************************/
 106 /* character device */
 107
 108 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
 109     QTAILQ_HEAD_INITIALIZER(chardevs);
 110
 111 static void qemu_chr_event(CharDriverState *s, int event)
 112 {
 113     /* Keep track if the char device is open */
 114     switch (event) {
 115         case CHR_EVENT_OPENED:
 116             s->opened = 1;
 117             break;
 118         case CHR_EVENT_CLOSED:
 119             s->opened = 0;
 120             break;
 121     }
 122
 123     if (!s->chr_event)
 124         return;
 125     s->chr_event(s->handler_opaque, event, NULL);
 126 }
 127
 128 static void qemu_chr_generic_open_bh(void *opaque)
 129 {
 130     CharDriverState *s = opaque;
 131     qemu_chr_event(s, CHR_EVENT_OPENED);
 132     qemu_bh_delete(s->bh);
 133     s->bh = NULL;
 134 }
 135
 136 void qemu_chr_generic_open(CharDriverState *s)
 137 {
 138     if (s->bh == NULL) {
 139         s->bh = qemu_bh_new(qemu_chr_generic_open_bh, s);
 140         qemu_bh_schedule(s->bh);
 141     }
 142 }
 143
 144 static uint32_t char_queue_get_avail(CharQueue *q)
 145 {
 146     return sizeof(q->ring) - (q->prod - q->cons);
 147 }
 148
 149 static bool char_queue_get_empty(CharQueue *q)
 150 {
 151     return (q->cons == q->prod);
 152 }
 153
 154 static size_t char_queue_write(CharQueue *q, const void *data, size_t size)
 155 {
 156     const uint8_t *ptr = data;
 157     size_t i;
 158
 159     for (i = 0; i < size; i++) {
 160         if (char_queue_get_avail(q) == 0) {
 161             break;
 162         }
 163
 164         q->ring[q->prod % sizeof(q->ring)] = ptr[i];
 165         q->prod++;
 166     }
 167
 168     return i;
 169 }
 170
 171 static size_t char_queue_read(CharQueue *q, void *data, size_t size)
 172 {
 173     uint8_t *ptr = data;
 174     size_t i;
 175
 176     for (i = 0; i < size; i++) {
 177         if (char_queue_get_empty(q)) {
 178             break;
 179         }
 180
 181         ptr[i] = q->ring[q->cons % sizeof(q->ring)];
 182         q->cons++;
 183     }
 184
 185     return i;
 186 }
 187
 188 static void qemu_chr_flush_fe_tx(CharDriverState *s)
 189 {
 190     uint8_t buf[MAX_CHAR_QUEUE_RING];
 191     int len;
 192
 193     /* Don't use polling queue if new style handlers are registered */
 194     if (s->be_read || s->be_write) {
 195         return;
 196     }
 197
 198     /* Drain the queue into a flat buffer */
 199     len = char_queue_read(&s->fe_tx, buf, sizeof(buf));
 200
 201     s->chr_write(s, buf, len);
 202
 203     /* We drop unwritten data until we have backend flow control */
 204 }
 205
 206 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
 207 {
 208     int ret;
 209     bool is_empty;
 210
 211     assert(s->fe_opened > 0);
 212
 213     is_empty = char_queue_get_empty(&s->fe_tx);
 214
 215     ret = char_queue_write(&s->fe_tx, buf, len);
 216
 217     /* If the queue was empty, and now it's not, generate a read edge
 218      * event for the backend. */
 219     if (is_empty && !char_queue_get_empty(&s->fe_tx)) {
 220         if (s->be_read) {
 221             s->be_read(s->opaque);
 222         }
 223     }
 224
 225     qemu_chr_flush_fe_tx(s);
 226
 227     return ret;
 228 }
 229
 230 int qemu_chr_fe_read(CharDriverState *s, uint8_t *buf, int len)
 231 {
 232     bool is_full;
 233     int ret;
 234
 235     assert(s->fe_opened > 0);
 236
 237     is_full = (char_queue_get_avail(&s->be_tx) == 0);
 238
 239     ret = char_queue_read(&s->be_tx, buf, len);
 240
 241     /* If the queue was empty, and now its not, generate a write edge
 242      * event for the backend. */
 243     if (is_full && char_queue_get_avail(&s->be_tx)) {
 244         if (s->be_write) {
 245             s->be_write(s->opaque);
 246         }
 247     }
 248
 249     return ret;
 250 }
 251
 252 void qemu_chr_fe_set_handlers(CharDriverState *s,
 253                               IOHandler *chr_read,
 254                               IOHandler *chr_write,
 255                               IOEventHandler *chr_event,
 256                               void *opaque)
 257 {
 258     assert(s->fe_opened > 0);
 259
 260     if (!opaque && !chr_read && !chr_write && !chr_event) {
 261         /* chr driver being released. */
 262         ++s->avail_connections;
 263     }
 264     s->fe_read = chr_read;
 265     s->fe_write = chr_write;
 266     s->chr_event = chr_event;
 267     s->handler_opaque = opaque;
 268
 269     /* We're connecting to an already opened device, so let's make sure we
 270        also get the open event */
 271     if (s->opened) {
 272         qemu_chr_generic_open(s);
 273     }
 274 }
 275
 276 int qemu_chr_be_can_write(CharDriverState *s)
 277 {
 278     /* Try to flush any queued data before returning how much data we can
 279      * accept. */
 280     return char_queue_get_avail(&s->be_tx);
 281 }
 282
 283 int qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
 284 {
 285     int ret;
 286     bool is_empty;
 287
 288     is_empty = char_queue_get_empty(&s->be_tx);
 289
 290     ret = char_queue_write(&s->be_tx, buf, len);
 291
 292     /* If the queue was empty, and now it's not, trigger a read edge
 293      * event. */
 294     if (is_empty && !char_queue_get_empty(&s->be_tx)) {
 295         if (s->fe_read) {
 296             s->fe_read(s->handler_opaque);
 297         }
 298     }
 299
 300     return ret;
 301 }
 302
 303 int qemu_chr_be_read(CharDriverState *s, uint8_t *buf, int len)
 304 {
 305     bool is_full;
 306     int ret;
 307
 308     is_full = (char_queue_get_avail(&s->fe_tx) == 0);
 309
 310     ret = char_queue_read(&s->fe_tx, buf, len);
 311
 312     /* If the queue was full, and now it's not, trigger an write edge
 313      * event. */
 314     if (is_full && char_queue_get_avail(&s->fe_tx)) {
 315         if (s->fe_write) {
 316             s->fe_write(s->handler_opaque);
 317         }
 318     }
 319
 320     return ret;
 321 }
 322
 323 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
 324 {
 325     if (!s->chr_ioctl)
 326         return -ENOTSUP;
 327     return s->chr_ioctl(s->opaque, cmd, arg);
 328 }
 329
 330 int qemu_chr_add_client(CharDriverState *s, int fd)
 331 {
 332     return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
 333 }
 334
 335 void qemu_chr_printf(CharDriverState *s, const char *fmt, ...)
 336 {
 337     char buf[READ_BUF_LEN];
 338     va_list ap;
 339     va_start(ap, fmt);
 340     vsnprintf(buf, sizeof(buf), fmt, ap);
 341     qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
 342     va_end(ap);
 343 }
 344
 345 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 346 {
 347     return len;
 348 }
 349
 350 static int qemu_chr_open_null(QemuOpts *opts, CharDriverState **_chr)
 351 {
 352     CharDriverState *chr;
 353
 354     chr = qemu_mallocz(sizeof(CharDriverState));
 355     chr->chr_write = null_chr_write;
 356
 357     *_chr= chr;
 358     return 0;
 359 }
 360
 361 #ifdef _WIN32
 362 int send_all(int fd, const void *buf, int len1)
 363 {
 364     int ret, len;
 365
 366     len = len1;
 367     while (len > 0) {
 368         ret = send(fd, buf, len, 0);
 369         if (ret < 0) {
 370             errno = WSAGetLastError();
 371             if (errno != WSAEWOULDBLOCK) {
 372                 return -1;
 373             }
 374         } else if (ret == 0) {
 375             break;
 376         } else {
 377             buf += ret;
 378             len -= ret;
 379         }
 380     }
 381     return len1 - len;
 382 }
 383
 384 #else
 385
 386 int send_all(int fd, const void *_buf, int len1)
 387 {
 388     int ret, len;
 389     const uint8_t *buf = _buf;
 390
 391     len = len1;
 392     while (len > 0) {
 393         ret = write(fd, buf, len);
 394         if (ret < 0) {
 395             if (errno != EINTR && errno != EAGAIN)
 396                 return -1;
 397         } else if (ret == 0) {
 398             break;
 399         } else {
 400             buf += ret;
 401             len -= ret;
 402         }
 403     }
 404     return len1 - len;
 405 }
 406 #endif /* !_WIN32 */
 407
 408 #ifndef _WIN32
 409
 410 typedef struct {
 411     int fd_in, fd_out;
 412     int max_size;
 413 } FDCharDriver;
 414
 415 #define STDIO_MAX_CLIENTS 1
 416 static int stdio_nb_clients = 0;
 417
 418 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 419 {
 420     FDCharDriver *s = chr->opaque;
 421     return send_all(s->fd_out, buf, len);
 422 }
 423
 424 static int fd_chr_read_poll(void *opaque)
 425 {
 426     CharDriverState *chr = opaque;
 427     FDCharDriver *s = chr->opaque;
 428
 429     s->max_size = qemu_chr_be_can_write(chr);
 430     return s->max_size;
 431 }
 432
 433 static void fd_chr_read(void *opaque)
 434 {
 435     CharDriverState *chr = opaque;
 436     FDCharDriver *s = chr->opaque;
 437     int size, len;
 438     uint8_t buf[READ_BUF_LEN];
 439
 440     len = sizeof(buf);
 441     if (len > s->max_size)
 442         len = s->max_size;
 443     if (len == 0)
 444         return;
 445     size = read(s->fd_in, buf, len);
 446     if (size == 0) {
 447         /* FD has been closed. Remove it from the active list.  */
 448         qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
 449         qemu_chr_event(chr, CHR_EVENT_CLOSED);
 450         return;
 451     }
 452     if (size > 0) {
 453         qemu_chr_be_write(chr, buf, size);
 454     }
 455 }
 456
 457 static void fd_chr_update_read_handler(CharDriverState *chr)
 458 {
 459     FDCharDriver *s = chr->opaque;
 460
 461     if (s->fd_in >= 0) {
 462         if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
 463         } else {
 464             qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
 465                                  fd_chr_read, NULL, chr);
 466         }
 467     }
 468 }
 469
 470 static void fd_chr_close(struct CharDriverState *chr)
 471 {
 472     FDCharDriver *s = chr->opaque;
 473
 474     if (s->fd_in >= 0) {
 475         if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
 476         } else {
 477             qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
 478         }
 479     }
 480
 481     qemu_free(s);
 482     qemu_chr_event(chr, CHR_EVENT_CLOSED);
 483 }
 484
 485 /* open a character device to a unix fd */
 486 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
 487 {
 488     CharDriverState *chr;
 489     FDCharDriver *s;
 490
 491     chr = qemu_mallocz(sizeof(CharDriverState));
 492     s = qemu_mallocz(sizeof(FDCharDriver));
 493     s->fd_in = fd_in;
 494     s->fd_out = fd_out;
 495     chr->opaque = s;
 496     chr->chr_write = fd_chr_write;
 497     chr->chr_update_read_handler = fd_chr_update_read_handler;
 498     chr->chr_close = fd_chr_close;
 499
 500     qemu_chr_generic_open(chr);
 501
 502     return chr;
 503 }
 504
 505 static int qemu_chr_open_file_out(QemuOpts *opts, CharDriverState **_chr)
 506 {
 507     int fd_out;
 508
 509     TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
 510                       O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
 511     if (fd_out < 0) {
 512         return -errno;
 513     }
 514
 515     *_chr = qemu_chr_open_fd(-1, fd_out);
 516     return 0;
 517 }
 518
 519 static int qemu_chr_open_pipe(QemuOpts *opts, CharDriverState **_chr)
 520 {
 521     int fd_in, fd_out;
 522     char filename_in[256], filename_out[256];
 523     const char *filename = qemu_opt_get(opts, "path");
 524
 525     if (filename == NULL) {
 526         fprintf(stderr, "chardev: pipe: no filename given\n");
 527         return -EINVAL;
 528     }
 529
 530     snprintf(filename_in, 256, "%s.in", filename);
 531     snprintf(filename_out, 256, "%s.out", filename);
 532     TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
 533     TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
 534     if (fd_in < 0 || fd_out < 0) {
 535         if (fd_in >= 0)
 536             close(fd_in);
 537         if (fd_out >= 0)
 538             close(fd_out);
 539         TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
 540         if (fd_in < 0) {
 541             return -errno;
 542         }
 543     }
 544
 545     *_chr = qemu_chr_open_fd(fd_in, fd_out);
 546     return 0;
 547 }
 548
 549
 550 /* for STDIO, we handle the case where several clients use it
 551    (nographic mode) */
 552
 553 #define TERM_FIFO_MAX_SIZE 1
 554
 555 static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
 556 static int term_fifo_size;
 557
 558 static int stdio_read_poll(void *opaque)
 559 {
 560     CharDriverState *chr = opaque;
 561
 562     /* try to flush the queue if needed */
 563     if (term_fifo_size != 0 && qemu_chr_be_can_write(chr) > 0) {
 564         qemu_chr_be_write(chr, term_fifo, 1);
 565         term_fifo_size = 0;
 566     }
 567     /* see if we can absorb more chars */
 568     if (term_fifo_size == 0)
 569         return 1;
 570     else
 571         return 0;
 572 }
 573
 574 static void stdio_read(void *opaque)
 575 {
 576     int size;
 577     uint8_t buf[1];
 578     CharDriverState *chr = opaque;
 579
 580     size = read(0, buf, 1);
 581     if (size == 0) {
 582         /* stdin has been closed. Remove it from the active list.  */
 583         qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
 584         qemu_chr_event(chr, CHR_EVENT_CLOSED);
 585         return;
 586     }
 587     if (size > 0) {
 588         if (qemu_chr_be_can_write(chr) > 0) {
 589             qemu_chr_be_write(chr, buf, 1);
 590         } else if (term_fifo_size == 0) {
 591             term_fifo[term_fifo_size++] = buf[0];
 592         }
 593     }
 594 }
 595
 596 /* init terminal so that we can grab keys */
 597 static struct termios oldtty;
 598 static int old_fd0_flags;
 599 static bool stdio_allow_signal;
 600
 601 static void term_exit(void)
 602 {
 603     tcsetattr (0, TCSANOW, &oldtty);
 604     fcntl(0, F_SETFL, old_fd0_flags);
 605 }
 606
 607 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
 608 {
 609     struct termios tty;
 610
 611     tty = oldtty;
 612     if (!echo) {
 613         tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
 614                           |INLCR|IGNCR|ICRNL|IXON);
 615         tty.c_oflag |= OPOST;
 616         tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
 617         tty.c_cflag &= ~(CSIZE|PARENB);
 618         tty.c_cflag |= CS8;
 619         tty.c_cc[VMIN] = 1;
 620         tty.c_cc[VTIME] = 0;
 621     }
 622     /* if graphical mode, we allow Ctrl-C handling */
 623     if (!stdio_allow_signal)
 624         tty.c_lflag &= ~ISIG;
 625
 626     tcsetattr (0, TCSANOW, &tty);
 627 }
 628
 629 static void qemu_chr_close_stdio(struct CharDriverState *chr)
 630 {
 631     term_exit();
 632     stdio_nb_clients--;
 633     qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
 634     fd_chr_close(chr);
 635 }
 636
 637 static int qemu_chr_open_stdio(QemuOpts *opts, CharDriverState **_chr)
 638 {
 639     CharDriverState *chr;
 640
 641     if (stdio_nb_clients >= STDIO_MAX_CLIENTS) {
 642         return -EBUSY;
 643     }
 644
 645     if (stdio_nb_clients == 0) {
 646         old_fd0_flags = fcntl(0, F_GETFL);
 647         tcgetattr (0, &oldtty);
 648         fcntl(0, F_SETFL, O_NONBLOCK);
 649         atexit(term_exit);
 650     }
 651
 652     chr = qemu_chr_open_fd(0, 1);
 653     chr->chr_close = qemu_chr_close_stdio;
 654     chr->chr_set_echo = qemu_chr_set_echo_stdio;
 655     qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
 656     stdio_nb_clients++;
 657     stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
 658                                            display_type != DT_NOGRAPHIC);
 659     qemu_chr_set_echo(chr, false);
 660
 661     *_chr = chr;
 662     return 0;
 663 }
 664
 665 #ifdef __sun__
 666 /* Once Solaris has openpty(), this is going to be removed. */
 667 static int openpty(int *amaster, int *aslave, char *name,
 668                    struct termios *termp, struct winsize *winp)
 669 {
 670         const char *slave;
 671         int mfd = -1, sfd = -1;
 672
 673         *amaster = *aslave = -1;
 674
 675         mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
 676         if (mfd < 0)
 677                 goto err;
 678
 679         if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
 680                 goto err;
 681
 682         if ((slave = ptsname(mfd)) == NULL)
 683                 goto err;
 684
 685         if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
 686                 goto err;
 687
 688         if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
 689             (termp != NULL && tcgetattr(sfd, termp) < 0))
 690                 goto err;
 691
 692         if (amaster)
 693                 *amaster = mfd;
 694         if (aslave)
 695                 *aslave = sfd;
 696         if (winp)
 697                 ioctl(sfd, TIOCSWINSZ, winp);
 698
 699         return 0;
 700
 701 err:
 702         if (sfd != -1)
 703                 close(sfd);
 704         close(mfd);
 705         return -1;
 706 }
 707
 708 static void cfmakeraw (struct termios *termios_p)
 709 {
 710         termios_p->c_iflag &=
 711                 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
 712         termios_p->c_oflag &= ~OPOST;
 713         termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
 714         termios_p->c_cflag &= ~(CSIZE|PARENB);
 715         termios_p->c_cflag |= CS8;
 716
 717         termios_p->c_cc[VMIN] = 0;
 718         termios_p->c_cc[VTIME] = 0;
 719 }
 720 #endif
 721
 722 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
 723     || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
 724     || defined(__GLIBC__)
 725
 726 typedef struct {
 727     int fd;
 728     int connected;
 729     int polling;
 730     int read_bytes;
 731     QEMUTimer *timer;
 732 } PtyCharDriver;
 733
 734 static void pty_chr_update_read_handler(CharDriverState *chr);
 735 static void pty_chr_state(CharDriverState *chr, int connected);
 736
 737 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 738 {
 739     PtyCharDriver *s = chr->opaque;
 740
 741     if (!s->connected) {
 742         /* guest sends data, check for (re-)connect */
 743         pty_chr_update_read_handler(chr);
 744         return 0;
 745     }
 746     return send_all(s->fd, buf, len);
 747 }
 748
 749 static int pty_chr_read_poll(void *opaque)
 750 {
 751     CharDriverState *chr = opaque;
 752     PtyCharDriver *s = chr->opaque;
 753
 754     s->read_bytes = qemu_chr_be_can_write(chr);
 755     return s->read_bytes;
 756 }
 757
 758 static void pty_chr_read(void *opaque)
 759 {
 760     CharDriverState *chr = opaque;
 761     PtyCharDriver *s = chr->opaque;
 762     int size, len;
 763     uint8_t buf[READ_BUF_LEN];
 764
 765     len = sizeof(buf);
 766     if (len > s->read_bytes)
 767         len = s->read_bytes;
 768     if (len == 0)
 769         return;
 770     size = read(s->fd, buf, len);
 771     if ((size == -1 && errno == EIO) ||
 772         (size == 0)) {
 773         pty_chr_state(chr, 0);
 774         return;
 775     }
 776     if (size > 0) {
 777         pty_chr_state(chr, 1);
 778         qemu_chr_be_write(chr, buf, size);
 779     }
 780 }
 781
 782 static void pty_chr_update_read_handler(CharDriverState *chr)
 783 {
 784     PtyCharDriver *s = chr->opaque;
 785
 786     qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
 787                          pty_chr_read, NULL, chr);
 788     s->polling = 1;
 789     /*
 790      * Short timeout here: just need wait long enougth that qemu makes
 791      * it through the poll loop once.  When reconnected we want a
 792      * short timeout so we notice it almost instantly.  Otherwise
 793      * read() gives us -EIO instantly, making pty_chr_state() reset the
 794      * timeout to the normal (much longer) poll interval before the
 795      * timer triggers.
 796      */
 797     qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 10);
 798 }
 799
 800 static void pty_chr_state(CharDriverState *chr, int connected)
 801 {
 802     PtyCharDriver *s = chr->opaque;
 803
 804     if (!connected) {
 805         qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
 806         s->connected = 0;
 807         s->polling = 0;
 808         /* (re-)connect poll interval for idle guests: once per second.
 809          * We check more frequently in case the guests sends data to
 810          * the virtual device linked to our pty. */
 811         qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 1000);
 812     } else {
 813         if (!s->connected)
 814             qemu_chr_generic_open(chr);
 815         s->connected = 1;
 816     }
 817 }
 818
 819 static void pty_chr_timer(void *opaque)
 820 {
 821     struct CharDriverState *chr = opaque;
 822     PtyCharDriver *s = chr->opaque;
 823
 824     if (s->connected)
 825         return;
 826     if (s->polling) {
 827         /* If we arrive here without polling being cleared due
 828          * read returning -EIO, then we are (re-)connected */
 829         pty_chr_state(chr, 1);
 830         return;
 831     }
 832
 833     /* Next poll ... */
 834     pty_chr_update_read_handler(chr);
 835 }
 836
 837 static void pty_chr_close(struct CharDriverState *chr)
 838 {
 839     PtyCharDriver *s = chr->opaque;
 840
 841     qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
 842     close(s->fd);
 843     qemu_del_timer(s->timer);
 844     qemu_free_timer(s->timer);
 845     qemu_free(s);
 846     qemu_chr_event(chr, CHR_EVENT_CLOSED);
 847 }
 848
 849 static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr)
 850 {
 851     CharDriverState *chr;
 852     PtyCharDriver *s;
 853     struct termios tty;
 854     int slave_fd, len;
 855 #if defined(__OpenBSD__) || defined(__DragonFly__)
 856     char pty_name[PATH_MAX];
 857 #define q_ptsname(x) pty_name
 858 #else
 859     char *pty_name = NULL;
 860 #define q_ptsname(x) ptsname(x)
 861 #endif
 862
 863     chr = qemu_mallocz(sizeof(CharDriverState));
 864     s = qemu_mallocz(sizeof(PtyCharDriver));
 865
 866     if (openpty(&s->fd, &slave_fd, pty_name, NULL, NULL) < 0) {
 867         return -errno;
 868     }
 869
 870     /* Set raw attributes on the pty. */
 871     tcgetattr(slave_fd, &tty);
 872     cfmakeraw(&tty);
 873     tcsetattr(slave_fd, TCSAFLUSH, &tty);
 874     close(slave_fd);
 875
 876     len = strlen(q_ptsname(s->fd)) + 5;
 877     chr->filename = qemu_malloc(len);
 878     snprintf(chr->filename, len, "pty:%s", q_ptsname(s->fd));
 879     qemu_opt_set(opts, "path", q_ptsname(s->fd));
 880     fprintf(stderr, "char device redirected to %s\n", q_ptsname(s->fd));
 881
 882     chr->opaque = s;
 883     chr->chr_write = pty_chr_write;
 884     chr->chr_update_read_handler = pty_chr_update_read_handler;
 885     chr->chr_close = pty_chr_close;
 886
 887     s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr);
 888
 889     *_chr = chr;
 890     return 0;
 891 }
 892
 893 static void tty_serial_init(int fd, int speed,
 894                             int parity, int data_bits, int stop_bits)
 895 {
 896     struct termios tty;
 897     speed_t spd;
 898
 899 #if 0
 900     printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
 901            speed, parity, data_bits, stop_bits);
 902 #endif
 903     tcgetattr (fd, &tty);
 904
 905 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
 906     speed = speed * 10 / 11;
 907     do {
 908         check_speed(50);
 909         check_speed(75);
 910         check_speed(110);
 911         check_speed(134);
 912         check_speed(150);
 913         check_speed(200);
 914         check_speed(300);
 915         check_speed(600);
 916         check_speed(1200);
 917         check_speed(1800);
 918         check_speed(2400);
 919         check_speed(4800);
 920         check_speed(9600);
 921         check_speed(19200);
 922         check_speed(38400);
 923         /* Non-Posix values follow. They may be unsupported on some systems. */
 924         check_speed(57600);
 925         check_speed(115200);
 926 #ifdef B230400
 927         check_speed(230400);
 928 #endif
 929 #ifdef B460800
 930         check_speed(460800);
 931 #endif
 932 #ifdef B500000
 933         check_speed(500000);
 934 #endif
 935 #ifdef B576000
 936         check_speed(576000);
 937 #endif
 938 #ifdef B921600
 939         check_speed(921600);
 940 #endif
 941 #ifdef B1000000
 942         check_speed(1000000);
 943 #endif
 944 #ifdef B1152000
 945         check_speed(1152000);
 946 #endif
 947 #ifdef B1500000
 948         check_speed(1500000);
 949 #endif
 950 #ifdef B2000000
 951         check_speed(2000000);
 952 #endif
 953 #ifdef B2500000
 954         check_speed(2500000);
 955 #endif
 956 #ifdef B3000000
 957         check_speed(3000000);
 958 #endif
 959 #ifdef B3500000
 960         check_speed(3500000);
 961 #endif
 962 #ifdef B4000000
 963         check_speed(4000000);
 964 #endif
 965         spd = B115200;
 966     } while (0);
 967
 968     cfsetispeed(&tty, spd);
 969     cfsetospeed(&tty, spd);
 970
 971     tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
 972                           |INLCR|IGNCR|ICRNL|IXON);
 973     tty.c_oflag |= OPOST;
 974     tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
 975     tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
 976     switch(data_bits) {
 977     default:
 978     case 8:
 979         tty.c_cflag |= CS8;
 980         break;
 981     case 7:
 982         tty.c_cflag |= CS7;
 983         break;
 984     case 6:
 985         tty.c_cflag |= CS6;
 986         break;
 987     case 5:
 988         tty.c_cflag |= CS5;
 989         break;
 990     }
 991     switch(parity) {
 992     default:
 993     case 'N':
 994         break;
 995     case 'E':
 996         tty.c_cflag |= PARENB;
 997         break;
 998     case 'O':
 999         tty.c_cflag |= PARENB | PARODD;
1000         break;
1001     }
1002     if (stop_bits == 2)
1003         tty.c_cflag |= CSTOPB;
1004
1005     tcsetattr (fd, TCSANOW, &tty);
1006 }
1007
1008 static int tty_serial_ioctl(void *opaque, int cmd, void *arg)
1009 {
1010     FDCharDriver *s = opaque;
1011
1012     switch(cmd) {
1013     case CHR_IOCTL_SERIAL_SET_PARAMS:
1014         {
1015             QEMUSerialSetParams *ssp = arg;
1016             tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1017                             ssp->data_bits, ssp->stop_bits);
1018         }
1019         break;
1020     case CHR_IOCTL_SERIAL_SET_BREAK:
1021         {
1022             int enable = *(int *)arg;
1023             if (enable)
1024                 tcsendbreak(s->fd_in, 1);
1025         }
1026         break;
1027     case CHR_IOCTL_SERIAL_GET_TIOCM:
1028         {
1029             int sarg = 0;
1030             int *targ = (int *)arg;
1031             ioctl(s->fd_in, TIOCMGET, &sarg);
1032             *targ = 0;
1033             if (sarg & TIOCM_CTS)
1034                 *targ |= CHR_TIOCM_CTS;
1035             if (sarg & TIOCM_CAR)
1036                 *targ |= CHR_TIOCM_CAR;
1037             if (sarg & TIOCM_DSR)
1038                 *targ |= CHR_TIOCM_DSR;
1039             if (sarg & TIOCM_RI)
1040                 *targ |= CHR_TIOCM_RI;
1041             if (sarg & TIOCM_DTR)
1042                 *targ |= CHR_TIOCM_DTR;
1043             if (sarg & TIOCM_RTS)
1044                 *targ |= CHR_TIOCM_RTS;
1045         }
1046         break;
1047     case CHR_IOCTL_SERIAL_SET_TIOCM:
1048         {
1049             int sarg = *(int *)arg;
1050             int targ = 0;
1051             ioctl(s->fd_in, TIOCMGET, &targ);
1052             targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1053                      | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1054             if (sarg & CHR_TIOCM_CTS)
1055                 targ |= TIOCM_CTS;
1056             if (sarg & CHR_TIOCM_CAR)
1057                 targ |= TIOCM_CAR;
1058             if (sarg & CHR_TIOCM_DSR)
1059                 targ |= TIOCM_DSR;
1060             if (sarg & CHR_TIOCM_RI)
1061                 targ |= TIOCM_RI;
1062             if (sarg & CHR_TIOCM_DTR)
1063                 targ |= TIOCM_DTR;
1064             if (sarg & CHR_TIOCM_RTS)
1065                 targ |= TIOCM_RTS;
1066             ioctl(s->fd_in, TIOCMSET, &targ);
1067         }
1068         break;
1069     default:
1070         return -ENOTSUP;
1071     }
1072     return 0;
1073 }
1074
1075 static void qemu_chr_close_tty(CharDriverState *chr)
1076 {
1077     FDCharDriver *s = chr->opaque;
1078     int fd = -1;
1079
1080     if (s) {
1081         fd = s->fd_in;
1082     }
1083
1084     fd_chr_close(chr);
1085
1086     if (fd >= 0) {
1087         close(fd);
1088     }
1089 }
1090
1091 static int qemu_chr_open_tty(QemuOpts *opts, CharDriverState **_chr)
1092 {
1093     const char *filename = qemu_opt_get(opts, "path");
1094     CharDriverState *chr;
1095     int fd;
1096
1097     TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK));
1098     if (fd < 0) {
1099         return -errno;
1100     }
1101     tty_serial_init(fd, 115200, 'N', 8, 1);
1102     chr = qemu_chr_open_fd(fd, fd);
1103     chr->chr_ioctl = tty_serial_ioctl;
1104     chr->chr_close = qemu_chr_close_tty;
1105
1106     *_chr = chr;
1107     return 0;
1108 }
1109 #else  /* ! __linux__ && ! __sun__ */
1110 static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr)
1111 {
1112     return -ENOTSUP;
1113 }
1114 #endif /* __linux__ || __sun__ */
1115
1116 #if defined(__linux__)
1117 typedef struct {
1118     int fd;
1119     int mode;
1120 } ParallelCharDriver;
1121
1122 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1123 {
1124     if (s->mode != mode) {
1125         int m = mode;
1126         if (ioctl(s->fd, PPSETMODE, &m) < 0)
1127             return 0;
1128         s->mode = mode;
1129     }
1130     return 1;
1131 }
1132
1133 static int pp_ioctl(void *opaque, int cmd, void *arg)
1134 {
1135     ParallelCharDriver *drv = opaque;
1136     int fd = drv->fd;
1137     uint8_t b;
1138
1139     switch(cmd) {
1140     case CHR_IOCTL_PP_READ_DATA:
1141         if (ioctl(fd, PPRDATA, &b) < 0)
1142             return -ENOTSUP;
1143         *(uint8_t *)arg = b;
1144         break;
1145     case CHR_IOCTL_PP_WRITE_DATA:
1146         b = *(uint8_t *)arg;
1147         if (ioctl(fd, PPWDATA, &b) < 0)
1148             return -ENOTSUP;
1149         break;
1150     case CHR_IOCTL_PP_READ_CONTROL:
1151         if (ioctl(fd, PPRCONTROL, &b) < 0)
1152             return -ENOTSUP;
1153         /* Linux gives only the lowest bits, and no way to know data
1154            direction! For better compatibility set the fixed upper
1155            bits. */
1156         *(uint8_t *)arg = b | 0xc0;
1157         break;
1158     case CHR_IOCTL_PP_WRITE_CONTROL:
1159         b = *(uint8_t *)arg;
1160         if (ioctl(fd, PPWCONTROL, &b) < 0)
1161             return -ENOTSUP;
1162         break;
1163     case CHR_IOCTL_PP_READ_STATUS:
1164         if (ioctl(fd, PPRSTATUS, &b) < 0)
1165             return -ENOTSUP;
1166         *(uint8_t *)arg = b;
1167         break;
1168     case CHR_IOCTL_PP_DATA_DIR:
1169         if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1170             return -ENOTSUP;
1171         break;
1172     case CHR_IOCTL_PP_EPP_READ_ADDR:
1173         if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1174             struct ParallelIOArg *parg = arg;
1175             int n = read(fd, parg->buffer, parg->count);
1176             if (n != parg->count) {
1177                 return -EIO;
1178             }
1179         }
1180         break;
1181     case CHR_IOCTL_PP_EPP_READ:
1182         if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1183             struct ParallelIOArg *parg = arg;
1184             int n = read(fd, parg->buffer, parg->count);
1185             if (n != parg->count) {
1186                 return -EIO;
1187             }
1188         }
1189         break;
1190     case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1191         if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1192             struct ParallelIOArg *parg = arg;
1193             int n = write(fd, parg->buffer, parg->count);
1194             if (n != parg->count) {
1195                 return -EIO;
1196             }
1197         }
1198         break;
1199     case CHR_IOCTL_PP_EPP_WRITE:
1200         if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1201             struct ParallelIOArg *parg = arg;
1202             int n = write(fd, parg->buffer, parg->count);
1203             if (n != parg->count) {
1204                 return -EIO;
1205             }
1206         }
1207         break;
1208     default:
1209         return -ENOTSUP;
1210     }
1211     return 0;
1212 }
1213
1214 static void pp_close(CharDriverState *chr)
1215 {
1216     ParallelCharDriver *drv = chr->opaque;
1217     int fd = drv->fd;
1218
1219     pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1220     ioctl(fd, PPRELEASE);
1221     close(fd);
1222     qemu_free(drv);
1223     qemu_chr_event(chr, CHR_EVENT_CLOSED);
1224 }
1225
1226 static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr)
1227 {
1228     const char *filename = qemu_opt_get(opts, "path");
1229     CharDriverState *chr;
1230     ParallelCharDriver *drv;
1231     int fd;
1232
1233     TFR(fd = open(filename, O_RDWR));
1234     if (fd < 0) {
1235         return -errno;
1236     }
1237
1238     if (ioctl(fd, PPCLAIM) < 0) {
1239         close(fd);
1240         return -errno;
1241     }
1242
1243     drv = qemu_mallocz(sizeof(ParallelCharDriver));
1244     drv->fd = fd;
1245     drv->mode = IEEE1284_MODE_COMPAT;
1246
1247     chr = qemu_mallocz(sizeof(CharDriverState));
1248     chr->chr_write = null_chr_write;
1249     chr->chr_ioctl = pp_ioctl;
1250     chr->chr_close = pp_close;
1251     chr->opaque = drv;
1252
1253     qemu_chr_generic_open(chr);
1254
1255     *_chr = chr;
1256     return 0;
1257 }
1258 #endif /* __linux__ */
1259
1260 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1261 static int pp_ioctl(void *opaque, int cmd, void *arg)
1262 {
1263     int fd = (int)(intptr_t)opaque;
1264     uint8_t b;
1265
1266     switch(cmd) {
1267     case CHR_IOCTL_PP_READ_DATA:
1268         if (ioctl(fd, PPIGDATA, &b) < 0)
1269             return -ENOTSUP;
1270         *(uint8_t *)arg = b;
1271         break;
1272     case CHR_IOCTL_PP_WRITE_DATA:
1273         b = *(uint8_t *)arg;
1274         if (ioctl(fd, PPISDATA, &b) < 0)
1275             return -ENOTSUP;
1276         break;
1277     case CHR_IOCTL_PP_READ_CONTROL:
1278         if (ioctl(fd, PPIGCTRL, &b) < 0)
1279             return -ENOTSUP;
1280         *(uint8_t *)arg = b;
1281         break;
1282     case CHR_IOCTL_PP_WRITE_CONTROL:
1283         b = *(uint8_t *)arg;
1284         if (ioctl(fd, PPISCTRL, &b) < 0)
1285             return -ENOTSUP;
1286         break;
1287     case CHR_IOCTL_PP_READ_STATUS:
1288         if (ioctl(fd, PPIGSTATUS, &b) < 0)
1289             return -ENOTSUP;
1290         *(uint8_t *)arg = b;
1291         break;
1292     default:
1293         return -ENOTSUP;
1294     }
1295     return 0;
1296 }
1297
1298 static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr)
1299 {
1300     const char *filename = qemu_opt_get(opts, "path");
1301     CharDriverState *chr;
1302     int fd;
1303
1304     fd = qemu_open(filename, O_RDWR);
1305     if (fd < 0) {
1306         return -errno;
1307     }
1308
1309     chr = qemu_mallocz(sizeof(CharDriverState));
1310     chr->opaque = (void *)(intptr_t)fd;
1311     chr->chr_write = null_chr_write;
1312     chr->chr_ioctl = pp_ioctl;
1313
1314     *_chr = chr;
1315     return 0;
1316 }
1317 #endif
1318
1319 #else /* _WIN32 */
1320
1321 typedef struct {
1322     int max_size;
1323     HANDLE hcom, hrecv, hsend;
1324     OVERLAPPED orecv, osend;
1325     BOOL fpipe;
1326     DWORD len;
1327 } WinCharState;
1328
1329 #define NSENDBUF 2048
1330 #define NRECVBUF 2048
1331 #define MAXCONNECT 1
1332 #define NTIMEOUT 5000
1333
1334 static int win_chr_poll(void *opaque);
1335 static int win_chr_pipe_poll(void *opaque);
1336
1337 static void win_chr_close(CharDriverState *chr)
1338 {
1339     WinCharState *s = chr->opaque;
1340
1341     if (s->hsend) {
1342         CloseHandle(s->hsend);
1343         s->hsend = NULL;
1344     }
1345     if (s->hrecv) {
1346         CloseHandle(s->hrecv);
1347         s->hrecv = NULL;
1348     }
1349     if (s->hcom) {
1350         CloseHandle(s->hcom);
1351         s->hcom = NULL;
1352     }
1353     if (s->fpipe)
1354         qemu_del_polling_cb(win_chr_pipe_poll, chr);
1355     else
1356         qemu_del_polling_cb(win_chr_poll, chr);
1357
1358     qemu_chr_event(chr, CHR_EVENT_CLOSED);
1359 }
1360
1361 static int win_chr_init(CharDriverState *chr, const char *filename)
1362 {
1363     WinCharState *s = chr->opaque;
1364     COMMCONFIG comcfg;
1365     COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1366     COMSTAT comstat;
1367     DWORD size;
1368     DWORD err;
1369
1370     s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1371     if (!s->hsend) {
1372         fprintf(stderr, "Failed CreateEvent\n");
1373         goto fail;
1374     }
1375     s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1376     if (!s->hrecv) {
1377         fprintf(stderr, "Failed CreateEvent\n");
1378         goto fail;
1379     }
1380
1381     s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1382                       OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1383     if (s->hcom == INVALID_HANDLE_VALUE) {
1384         fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1385         s->hcom = NULL;
1386         goto fail;
1387     }
1388
1389     if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1390         fprintf(stderr, "Failed SetupComm\n");
1391         goto fail;
1392     }
1393
1394     ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1395     size = sizeof(COMMCONFIG);
1396     GetDefaultCommConfig(filename, &comcfg, &size);
1397     comcfg.dcb.DCBlength = sizeof(DCB);
1398     CommConfigDialog(filename, NULL, &comcfg);
1399
1400     if (!SetCommState(s->hcom, &comcfg.dcb)) {
1401         fprintf(stderr, "Failed SetCommState\n");
1402         goto fail;
1403     }
1404
1405     if (!SetCommMask(s->hcom, EV_ERR)) {
1406         fprintf(stderr, "Failed SetCommMask\n");
1407         goto fail;
1408     }
1409
1410     cto.ReadIntervalTimeout = MAXDWORD;
1411     if (!SetCommTimeouts(s->hcom, &cto)) {
1412         fprintf(stderr, "Failed SetCommTimeouts\n");
1413         goto fail;
1414     }
1415
1416     if (!ClearCommError(s->hcom, &err, &comstat)) {
1417         fprintf(stderr, "Failed ClearCommError\n");
1418         goto fail;
1419     }
1420     qemu_add_polling_cb(win_chr_poll, chr);
1421     return 0;
1422
1423  fail:
1424     win_chr_close(chr);
1425     return -1;
1426 }
1427
1428 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1429 {
1430     WinCharState *s = chr->opaque;
1431     DWORD len, ret, size, err;
1432
1433     len = len1;
1434     ZeroMemory(&s->osend, sizeof(s->osend));
1435     s->osend.hEvent = s->hsend;
1436     while (len > 0) {
1437         if (s->hsend)
1438             ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1439         else
1440             ret = WriteFile(s->hcom, buf, len, &size, NULL);
1441         if (!ret) {
1442             err = GetLastError();
1443             if (err == ERROR_IO_PENDING) {
1444                 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1445                 if (ret) {
1446                     buf += size;
1447                     len -= size;
1448                 } else {
1449                     break;
1450                 }
1451             } else {
1452                 break;
1453             }
1454         } else {
1455             buf += size;
1456             len -= size;
1457         }
1458     }
1459     return len1 - len;
1460 }
1461
1462 static int win_chr_read_poll(CharDriverState *chr)
1463 {
1464     WinCharState *s = chr->opaque;
1465
1466     s->max_size = qemu_chr_be_can_write(chr);
1467     return s->max_size;
1468 }
1469
1470 static void win_chr_readfile(CharDriverState *chr)
1471 {
1472     WinCharState *s = chr->opaque;
1473     int ret, err;
1474     uint8_t buf[READ_BUF_LEN];
1475     DWORD size;
1476
1477     ZeroMemory(&s->orecv, sizeof(s->orecv));
1478     s->orecv.hEvent = s->hrecv;
1479     ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1480     if (!ret) {
1481         err = GetLastError();
1482         if (err == ERROR_IO_PENDING) {
1483             ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1484         }
1485     }
1486
1487     if (size > 0) {
1488         qemu_chr_be_write(chr, buf, size);
1489     }
1490 }
1491
1492 static void win_chr_read(CharDriverState *chr)
1493 {
1494     WinCharState *s = chr->opaque;
1495
1496     if (s->len > s->max_size)
1497         s->len = s->max_size;
1498     if (s->len == 0)
1499         return;
1500
1501     win_chr_readfile(chr);
1502 }
1503
1504 static int win_chr_poll(void *opaque)
1505 {
1506     CharDriverState *chr = opaque;
1507     WinCharState *s = chr->opaque;
1508     COMSTAT status;
1509     DWORD comerr;
1510
1511     ClearCommError(s->hcom, &comerr, &status);
1512     if (status.cbInQue > 0) {
1513         s->len = status.cbInQue;
1514         win_chr_read_poll(chr);
1515         win_chr_read(chr);
1516         return 1;
1517     }
1518     return 0;
1519 }
1520
1521 static int qemu_chr_open_win(QemuOpts *opts, CharDriverState **_chr)
1522 {
1523     const char *filename = qemu_opt_get(opts, "path");
1524     CharDriverState *chr;
1525     WinCharState *s;
1526
1527     chr = qemu_mallocz(sizeof(CharDriverState));
1528     s = qemu_mallocz(sizeof(WinCharState));
1529     chr->opaque = s;
1530     chr->chr_write = win_chr_write;
1531     chr->chr_close = win_chr_close;
1532
1533     if (win_chr_init(chr, filename) < 0) {
1534         free(s);
1535         free(chr);
1536         return -EIO;
1537     }
1538     qemu_chr_generic_open(chr);
1539
1540     *_chr = chr;
1541     return 0;
1542 }
1543
1544 static int win_chr_pipe_poll(void *opaque)
1545 {
1546     CharDriverState *chr = opaque;
1547     WinCharState *s = chr->opaque;
1548     DWORD size;
1549
1550     PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1551     if (size > 0) {
1552         s->len = size;
1553         win_chr_read_poll(chr);
1554         win_chr_read(chr);
1555         return 1;
1556     }
1557     return 0;
1558 }
1559
1560 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1561 {
1562     WinCharState *s = chr->opaque;
1563     OVERLAPPED ov;
1564     int ret;
1565     DWORD size;
1566     char openname[256];
1567
1568     s->fpipe = TRUE;
1569
1570     s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1571     if (!s->hsend) {
1572         fprintf(stderr, "Failed CreateEvent\n");
1573         goto fail;
1574     }
1575     s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1576     if (!s->hrecv) {
1577         fprintf(stderr, "Failed CreateEvent\n");
1578         goto fail;
1579     }
1580
1581     snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1582     s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1583                               PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1584                               PIPE_WAIT,
1585                               MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1586     if (s->hcom == INVALID_HANDLE_VALUE) {
1587         fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1588         s->hcom = NULL;
1589         goto fail;
1590     }
1591
1592     ZeroMemory(&ov, sizeof(ov));
1593     ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1594     ret = ConnectNamedPipe(s->hcom, &ov);
1595     if (ret) {
1596         fprintf(stderr, "Failed ConnectNamedPipe\n");
1597         goto fail;
1598     }
1599
1600     ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1601     if (!ret) {
1602         fprintf(stderr, "Failed GetOverlappedResult\n");
1603         if (ov.hEvent) {
1604             CloseHandle(ov.hEvent);
1605             ov.hEvent = NULL;
1606         }
1607         goto fail;
1608     }
1609
1610     if (ov.hEvent) {
1611         CloseHandle(ov.hEvent);
1612         ov.hEvent = NULL;
1613     }
1614     qemu_add_polling_cb(win_chr_pipe_poll, chr);
1615     return 0;
1616
1617  fail:
1618     win_chr_close(chr);
1619     return -1;
1620 }
1621
1622
1623 static int qemu_chr_open_win_pipe(QemuOpts *opts, CharDriverState **_chr)
1624 {
1625     const char *filename = qemu_opt_get(opts, "path");
1626     CharDriverState *chr;
1627     WinCharState *s;
1628
1629     chr = qemu_mallocz(sizeof(CharDriverState));
1630     s = qemu_mallocz(sizeof(WinCharState));
1631     chr->opaque = s;
1632     chr->chr_write = win_chr_write;
1633     chr->chr_close = win_chr_close;
1634
1635     if (win_chr_pipe_init(chr, filename) < 0) {
1636         free(s);
1637         free(chr);
1638         return -EIO;
1639     }
1640     qemu_chr_generic_open(chr);
1641
1642     *_chr = chr;
1643     return 0;
1644 }
1645
1646 static int qemu_chr_open_win_file(HANDLE fd_out, CharDriverState **pchr)
1647 {
1648     CharDriverState *chr;
1649     WinCharState *s;
1650
1651     chr = qemu_mallocz(sizeof(CharDriverState));
1652     s = qemu_mallocz(sizeof(WinCharState));
1653     s->hcom = fd_out;
1654     chr->opaque = s;
1655     chr->chr_write = win_chr_write;
1656     qemu_chr_generic_open(chr);
1657     *pchr = chr;
1658     return 0;
1659 }
1660
1661 static int qemu_chr_open_win_con(QemuOpts *opts, CharDriverState **chr)
1662 {
1663     return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE), chr);
1664 }
1665
1666 static int qemu_chr_open_win_file_out(QemuOpts *opts, CharDriverState **_chr)
1667 {
1668     const char *file_out = qemu_opt_get(opts, "path");
1669     HANDLE fd_out;
1670
1671     fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1672                         OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1673     if (fd_out == INVALID_HANDLE_VALUE) {
1674         return -EIO;
1675     }
1676
1677     return qemu_chr_open_win_file(fd_out, _chr);
1678 }
1679 #endif /* !_WIN32 */
1680
1681 /***********************************************************/
1682 /* UDP Net console */
1683
1684 typedef struct {
1685     int fd;
1686     uint8_t buf[READ_BUF_LEN];
1687     int bufcnt;
1688     int bufptr;
1689     int max_size;
1690 } NetCharDriver;
1691
1692 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1693 {
1694     NetCharDriver *s = chr->opaque;
1695
1696     return send(s->fd, (const void *)buf, len, 0);
1697 }
1698
1699 static int udp_chr_read_poll(void *opaque)
1700 {
1701     CharDriverState *chr = opaque;
1702     NetCharDriver *s = chr->opaque;
1703
1704     s->max_size = qemu_chr_be_can_write(chr);
1705
1706     /* If there were any stray characters in the queue process them
1707      * first
1708      */
1709     while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1710         qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
1711         s->bufptr++;
1712         s->max_size = qemu_chr_be_can_write(chr);
1713     }
1714     return s->max_size;
1715 }
1716
1717 static void udp_chr_read(void *opaque)
1718 {
1719     CharDriverState *chr = opaque;
1720     NetCharDriver *s = chr->opaque;
1721
1722     if (s->max_size == 0)
1723         return;
1724     s->bufcnt = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0);
1725     s->bufptr = s->bufcnt;
1726     if (s->bufcnt <= 0)
1727         return;
1728
1729     s->bufptr = 0;
1730     while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1731         qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
1732         s->bufptr++;
1733         s->max_size = qemu_chr_be_can_write(chr);
1734     }
1735 }
1736
1737 static void udp_chr_update_read_handler(CharDriverState *chr)
1738 {
1739     NetCharDriver *s = chr->opaque;
1740
1741     if (s->fd >= 0) {
1742         qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
1743                              udp_chr_read, NULL, chr);
1744     }
1745 }
1746
1747 static void udp_chr_close(CharDriverState *chr)
1748 {
1749     NetCharDriver *s = chr->opaque;
1750     if (s->fd >= 0) {
1751         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1752         closesocket(s->fd);
1753     }
1754     qemu_free(s);
1755     qemu_chr_event(chr, CHR_EVENT_CLOSED);
1756 }
1757
1758 static int qemu_chr_open_udp(QemuOpts *opts, CharDriverState **_chr)
1759 {
1760     CharDriverState *chr = NULL;
1761     NetCharDriver *s = NULL;
1762     int fd = -1;
1763     int ret;
1764
1765     chr = qemu_mallocz(sizeof(CharDriverState));
1766     s = qemu_mallocz(sizeof(NetCharDriver));
1767
1768     fd = inet_dgram_opts(opts);
1769     if (fd < 0) {
1770         fprintf(stderr, "inet_dgram_opts failed\n");
1771         ret = -errno;
1772         goto return_err;
1773     }
1774
1775     s->fd = fd;
1776     s->bufcnt = 0;
1777     s->bufptr = 0;
1778     chr->opaque = s;
1779     chr->chr_write = udp_chr_write;
1780     chr->chr_update_read_handler = udp_chr_update_read_handler;
1781     chr->chr_close = udp_chr_close;
1782
1783     *_chr = chr;
1784     return 0;
1785
1786 return_err:
1787     qemu_free(chr);
1788     qemu_free(s);
1789     if (fd >= 0) {
1790         closesocket(fd);
1791     }
1792     return ret;
1793 }
1794
1795 /***********************************************************/
1796 /* TCP Net console */
1797
1798 typedef struct {
1799     int fd, listen_fd;
1800     int connected;
1801     int max_size;
1802     int do_telnetopt;
1803     int do_nodelay;
1804     int is_unix;
1805     int msgfd;
1806 } TCPCharDriver;
1807
1808 static void tcp_chr_accept(void *opaque);
1809
1810 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1811 {
1812     TCPCharDriver *s = chr->opaque;
1813     if (s->connected) {
1814         return send_all(s->fd, buf, len);
1815     } else {
1816         /* XXX: indicate an error ? */
1817         return len;
1818     }
1819 }
1820
1821 static int tcp_chr_read_poll(void *opaque)
1822 {
1823     CharDriverState *chr = opaque;
1824     TCPCharDriver *s = chr->opaque;
1825     if (!s->connected)
1826         return 0;
1827     s->max_size = qemu_chr_be_can_write(chr);
1828     return s->max_size;
1829 }
1830
1831 #define IAC 255
1832 #define IAC_BREAK 243
1833 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
1834                                       TCPCharDriver *s,
1835                                       uint8_t *buf, int *size)
1836 {
1837     /* Handle any telnet client's basic IAC options to satisfy char by
1838      * char mode with no echo.  All IAC options will be removed from
1839      * the buf and the do_telnetopt variable will be used to track the
1840      * state of the width of the IAC information.
1841      *
1842      * IAC commands come in sets of 3 bytes with the exception of the
1843      * "IAC BREAK" command and the double IAC.
1844      */
1845
1846     int i;
1847     int j = 0;
1848
1849     for (i = 0; i < *size; i++) {
1850         if (s->do_telnetopt > 1) {
1851             if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
1852                 /* Double IAC means send an IAC */
1853                 if (j != i)
1854                     buf[j] = buf[i];
1855                 j++;
1856                 s->do_telnetopt = 1;
1857             } else {
1858                 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
1859                     /* Handle IAC break commands by sending a serial break */
1860                     qemu_chr_event(chr, CHR_EVENT_BREAK);
1861                     s->do_telnetopt++;
1862                 }
1863                 s->do_telnetopt++;
1864             }
1865             if (s->do_telnetopt >= 4) {
1866                 s->do_telnetopt = 1;
1867             }
1868         } else {
1869             if ((unsigned char)buf[i] == IAC) {
1870                 s->do_telnetopt = 2;
1871             } else {
1872                 if (j != i)
1873                     buf[j] = buf[i];
1874                 j++;
1875             }
1876         }
1877     }
1878     *size = j;
1879 }
1880
1881 static int tcp_chr_ioctl(void *opaque, int cmd, void *data)
1882 {
1883     TCPCharDriver *s = opaque;
1884     int ret;
1885
1886     switch (cmd) {
1887     case CHR_GET_MSGFD: {
1888         int *pfd = data;
1889         *pfd = s->msgfd;
1890         s->msgfd = -1;
1891         ret = 0;
1892         break;
1893     }
1894     default:
1895         ret = -ENOTSUP;
1896         break;
1897     }
1898
1899     return ret;
1900 }
1901
1902 #ifndef _WIN32
1903 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
1904 {
1905     TCPCharDriver *s = chr->opaque;
1906     struct cmsghdr *cmsg;
1907
1908     for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
1909         int fd;
1910
1911         if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
1912             cmsg->cmsg_level != SOL_SOCKET ||
1913             cmsg->cmsg_type != SCM_RIGHTS)
1914             continue;
1915
1916         fd = *((int *)CMSG_DATA(cmsg));
1917         if (fd < 0)
1918             continue;
1919
1920         if (s->msgfd != -1)
1921             close(s->msgfd);
1922         s->msgfd = fd;
1923     }
1924 }
1925
1926 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
1927 {
1928     TCPCharDriver *s = chr->opaque;
1929     struct msghdr msg = { NULL, };
1930     struct iovec iov[1];
1931     union {
1932         struct cmsghdr cmsg;
1933         char control[CMSG_SPACE(sizeof(int))];
1934     } msg_control;
1935     ssize_t ret;
1936
1937     iov[0].iov_base = buf;
1938     iov[0].iov_len = len;
1939
1940     msg.msg_iov = iov;
1941     msg.msg_iovlen = 1;
1942     msg.msg_control = &msg_control;
1943     msg.msg_controllen = sizeof(msg_control);
1944
1945     ret = recvmsg(s->fd, &msg, 0);
1946     if (ret > 0 && s->is_unix)
1947         unix_process_msgfd(chr, &msg);
1948
1949     return ret;
1950 }
1951 #else
1952 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
1953 {
1954     TCPCharDriver *s = chr->opaque;
1955     return qemu_recv(s->fd, buf, len, 0);
1956 }
1957 #endif
1958
1959 static void tcp_chr_read(void *opaque)
1960 {
1961     CharDriverState *chr = opaque;
1962     TCPCharDriver *s = chr->opaque;
1963     uint8_t buf[READ_BUF_LEN];
1964     int len, size;
1965
1966     if (!s->connected || s->max_size <= 0)
1967         return;
1968     len = sizeof(buf);
1969     if (len > s->max_size)
1970         len = s->max_size;
1971     size = tcp_chr_recv(chr, (void *)buf, len);
1972     if (size == 0) {
1973         /* connection closed */
1974         s->connected = 0;
1975         if (s->listen_fd >= 0) {
1976             qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
1977         }
1978         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1979         closesocket(s->fd);
1980         s->fd = -1;
1981         qemu_chr_event(chr, CHR_EVENT_CLOSED);
1982     } else if (size > 0) {
1983         if (s->do_telnetopt)
1984             tcp_chr_process_IAC_bytes(chr, s, buf, &size);
1985         if (size > 0)
1986             qemu_chr_be_write(chr, buf, size);
1987     }
1988 }
1989
1990 #ifndef _WIN32
1991 CharDriverState *qemu_chr_open_eventfd(int eventfd)
1992 {
1993     return qemu_chr_open_fd(eventfd, eventfd);
1994 }
1995 #endif
1996
1997 static void tcp_chr_connect(void *opaque)
1998 {
1999     CharDriverState *chr = opaque;
2000     TCPCharDriver *s = chr->opaque;
2001
2002     s->connected = 1;
2003     qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2004                          tcp_chr_read, NULL, chr);
2005     qemu_chr_generic_open(chr);
2006 }
2007
2008 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2009 static void tcp_chr_telnet_init(int fd)
2010 {
2011     char buf[3];
2012     /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2013     IACSET(buf, 0xff, 0xfb, 0x01);  /* IAC WILL ECHO */
2014     send(fd, (char *)buf, 3, 0);
2015     IACSET(buf, 0xff, 0xfb, 0x03);  /* IAC WILL Suppress go ahead */
2016     send(fd, (char *)buf, 3, 0);
2017     IACSET(buf, 0xff, 0xfb, 0x00);  /* IAC WILL Binary */
2018     send(fd, (char *)buf, 3, 0);
2019     IACSET(buf, 0xff, 0xfd, 0x00);  /* IAC DO Binary */
2020     send(fd, (char *)buf, 3, 0);
2021 }
2022
2023 static void socket_set_nodelay(int fd)
2024 {
2025     int val = 1;
2026     setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2027 }
2028
2029 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2030 {
2031     TCPCharDriver *s = chr->opaque;
2032     if (s->fd != -1)
2033         return -1;
2034
2035     socket_set_nonblock(fd);
2036     if (s->do_nodelay)
2037         socket_set_nodelay(fd);
2038     s->fd = fd;
2039     qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2040     tcp_chr_connect(chr);
2041
2042     return 0;
2043 }
2044
2045 static void tcp_chr_accept(void *opaque)
2046 {
2047     CharDriverState *chr = opaque;
2048     TCPCharDriver *s = chr->opaque;
2049     struct sockaddr_in saddr;
2050 #ifndef _WIN32
2051     struct sockaddr_un uaddr;
2052 #endif
2053     struct sockaddr *addr;
2054     socklen_t len;
2055     int fd;
2056
2057     for(;;) {
2058 #ifndef _WIN32
2059         if (s->is_unix) {
2060             len = sizeof(uaddr);
2061             addr = (struct sockaddr *)&uaddr;
2062         } else
2063 #endif
2064         {
2065             len = sizeof(saddr);
2066             addr = (struct sockaddr *)&saddr;
2067         }
2068         fd = qemu_accept(s->listen_fd, addr, &len);
2069         if (fd < 0 && errno != EINTR) {
2070             return;
2071         } else if (fd >= 0) {
2072             if (s->do_telnetopt)
2073                 tcp_chr_telnet_init(fd);
2074             break;
2075         }
2076     }
2077     if (tcp_chr_add_client(chr, fd) < 0)
2078         close(fd);
2079 }
2080
2081 static void tcp_chr_close(CharDriverState *chr)
2082 {
2083     TCPCharDriver *s = chr->opaque;
2084     if (s->fd >= 0) {
2085         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2086         closesocket(s->fd);
2087     }
2088     if (s->listen_fd >= 0) {
2089         qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2090         closesocket(s->listen_fd);
2091     }
2092     qemu_free(s);
2093     qemu_chr_event(chr, CHR_EVENT_CLOSED);
2094 }
2095
2096 static int qemu_chr_open_socket(QemuOpts *opts, CharDriverState **_chr)
2097 {
2098     CharDriverState *chr = NULL;
2099     TCPCharDriver *s = NULL;
2100     int fd = -1;
2101     int is_listen;
2102     int is_waitconnect;
2103     int do_nodelay;
2104     int is_unix;
2105     int is_telnet;
2106     int ret;
2107
2108     is_listen      = qemu_opt_get_bool(opts, "server", 0);
2109     is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2110     is_telnet      = qemu_opt_get_bool(opts, "telnet", 0);
2111     do_nodelay     = !qemu_opt_get_bool(opts, "delay", 1);
2112     is_unix        = qemu_opt_get(opts, "path") != NULL;
2113     if (!is_listen)
2114         is_waitconnect = 0;
2115
2116     chr = qemu_mallocz(sizeof(CharDriverState));
2117     s = qemu_mallocz(sizeof(TCPCharDriver));
2118
2119     if (is_unix) {
2120         if (is_listen) {
2121             fd = unix_listen_opts(opts);
2122         } else {
2123             fd = unix_connect_opts(opts);
2124         }
2125     } else {
2126         if (is_listen) {
2127             fd = inet_listen_opts(opts, 0);
2128         } else {
2129             fd = inet_connect_opts(opts);
2130         }
2131     }
2132     if (fd < 0) {
2133         ret = -errno;
2134         goto fail;
2135     }
2136
2137     if (!is_waitconnect)
2138         socket_set_nonblock(fd);
2139
2140     s->connected = 0;
2141     s->fd = -1;
2142     s->listen_fd = -1;
2143     s->msgfd = -1;
2144     s->is_unix = is_unix;
2145     s->do_nodelay = do_nodelay && !is_unix;
2146
2147     chr->opaque = s;
2148     chr->chr_write = tcp_chr_write;
2149     chr->chr_close = tcp_chr_close;
2150     chr->chr_add_client = tcp_chr_add_client;
2151     chr->chr_ioctl = tcp_chr_ioctl;
2152
2153     if (is_listen) {
2154         s->listen_fd = fd;
2155         qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2156         if (is_telnet)
2157             s->do_telnetopt = 1;
2158
2159     } else {
2160         s->connected = 1;
2161         s->fd = fd;
2162         socket_set_nodelay(fd);
2163         tcp_chr_connect(chr);
2164     }
2165
2166     /* for "info chardev" monitor command */
2167     chr->filename = qemu_malloc(256);
2168     if (is_unix) {
2169         snprintf(chr->filename, 256, "unix:%s%s",
2170                  qemu_opt_get(opts, "path"),
2171                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2172     } else if (is_telnet) {
2173         snprintf(chr->filename, 256, "telnet:%s:%s%s",
2174                  qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2175                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2176     } else {
2177         snprintf(chr->filename, 256, "tcp:%s:%s%s",
2178                  qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2179                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2180     }
2181
2182     if (is_listen && is_waitconnect) {
2183         printf("QEMU waiting for connection on: %s\n",
2184                chr->filename);
2185         tcp_chr_accept(chr);
2186         socket_set_nonblock(s->listen_fd);
2187     }
2188
2189     *_chr = chr;
2190     return 0;
2191
2192  fail:
2193     if (fd >= 0)
2194         closesocket(fd);
2195     qemu_free(s);
2196     qemu_free(chr);
2197     return ret;
2198 }
2199
2200 /***********************************************************/
2201 /* Memory chardev */
2202 typedef struct {
2203     size_t outbuf_size;
2204     size_t outbuf_capacity;
2205     uint8_t *outbuf;
2206 } MemoryDriver;
2207
2208 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2209 {
2210     MemoryDriver *d = chr->opaque;
2211
2212     /* TODO: the QString implementation has the same code, we should
2213      * introduce a generic way to do this in cutils.c */
2214     if (d->outbuf_capacity < d->outbuf_size + len) {
2215         /* grow outbuf */
2216         d->outbuf_capacity += len;
2217         d->outbuf_capacity *= 2;
2218         d->outbuf = qemu_realloc(d->outbuf, d->outbuf_capacity);
2219     }
2220
2221     memcpy(d->outbuf + d->outbuf_size, buf, len);
2222     d->outbuf_size += len;
2223
2224     return len;
2225 }
2226
2227 void qemu_chr_init_mem(CharDriverState *chr)
2228 {
2229     MemoryDriver *d;
2230
2231     d = qemu_malloc(sizeof(*d));
2232     d->outbuf_size = 0;
2233     d->outbuf_capacity = 4096;
2234     d->outbuf = qemu_mallocz(d->outbuf_capacity);
2235
2236     memset(chr, 0, sizeof(*chr));
2237     chr->opaque = d;
2238     chr->chr_write = mem_chr_write;
2239 }
2240
2241 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2242 {
2243     MemoryDriver *d = chr->opaque;
2244     return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2245 }
2246
2247 /* NOTE: this driver can not be closed with qemu_chr_close()! */
2248 void qemu_chr_close_mem(CharDriverState *chr)
2249 {
2250     MemoryDriver *d = chr->opaque;
2251
2252     qemu_free(d->outbuf);
2253     qemu_free(chr->opaque);
2254     chr->opaque = NULL;
2255     chr->chr_write = NULL;
2256 }
2257
2258 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2259 {
2260     const MemoryDriver *d = chr->opaque;
2261     return d->outbuf_size;
2262 }
2263
2264 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2265 {
2266     char host[65], port[33], width[8], height[8];
2267     int pos;
2268     const char *p;
2269     QemuOpts *opts;
2270
2271     opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
2272     if (NULL == opts)
2273         return NULL;
2274
2275     if (strcmp(filename, "null")    == 0 ||
2276         strcmp(filename, "pty")     == 0 ||
2277         strcmp(filename, "msmouse") == 0 ||
2278         strcmp(filename, "braille") == 0 ||
2279         strcmp(filename, "stdio")   == 0) {
2280         qemu_opt_set(opts, "backend", filename);
2281         return opts;
2282     }
2283     if (strstart(filename, "vc", &p)) {
2284         qemu_opt_set(opts, "backend", "vc");
2285         if (*p == ':') {
2286             if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2287                 /* pixels */
2288                 qemu_opt_set(opts, "width", width);
2289                 qemu_opt_set(opts, "height", height);
2290             } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2291                 /* chars */
2292                 qemu_opt_set(opts, "cols", width);
2293                 qemu_opt_set(opts, "rows", height);
2294             } else {
2295                 goto fail;
2296             }
2297         }
2298         return opts;
2299     }
2300     if (strcmp(filename, "con:") == 0) {
2301         qemu_opt_set(opts, "backend", "console");
2302         return opts;
2303     }
2304     if (strstart(filename, "COM", NULL)) {
2305         qemu_opt_set(opts, "backend", "serial");
2306         qemu_opt_set(opts, "path", filename);
2307         return opts;
2308     }
2309     if (strstart(filename, "file:", &p)) {
2310         qemu_opt_set(opts, "backend", "file");
2311         qemu_opt_set(opts, "path", p);
2312         return opts;
2313     }
2314     if (strstart(filename, "pipe:", &p)) {
2315         qemu_opt_set(opts, "backend", "pipe");
2316         qemu_opt_set(opts, "path", p);
2317         return opts;
2318     }
2319     if (strstart(filename, "tcp:", &p) ||
2320         strstart(filename, "telnet:", &p)) {
2321         if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2322             host[0] = 0;
2323             if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2324                 goto fail;
2325         }
2326         qemu_opt_set(opts, "backend", "socket");
2327         qemu_opt_set(opts, "host", host);
2328         qemu_opt_set(opts, "port", port);
2329         if (p[pos] == ',') {
2330             if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2331                 goto fail;
2332         }
2333         if (strstart(filename, "telnet:", &p))
2334             qemu_opt_set(opts, "telnet", "on");
2335         return opts;
2336     }
2337     if (strstart(filename, "udp:", &p)) {
2338         qemu_opt_set(opts, "backend", "udp");
2339         if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2340             host[0] = 0;
2341             if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2342                 goto fail;
2343             }
2344         }
2345         qemu_opt_set(opts, "host", host);
2346         qemu_opt_set(opts, "port", port);
2347         if (p[pos] == '@') {
2348             p += pos + 1;
2349             if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2350                 host[0] = 0;
2351                 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2352                     goto fail;
2353                 }
2354             }
2355             qemu_opt_set(opts, "localaddr", host);
2356             qemu_opt_set(opts, "localport", port);
2357         }
2358         return opts;
2359     }
2360     if (strstart(filename, "unix:", &p)) {
2361         qemu_opt_set(opts, "backend", "socket");
2362         if (qemu_opts_do_parse(opts, p, "path") != 0)
2363             goto fail;
2364         return opts;
2365     }
2366     if (strstart(filename, "/dev/parport", NULL) ||
2367         strstart(filename, "/dev/ppi", NULL)) {
2368         qemu_opt_set(opts, "backend", "parport");
2369         qemu_opt_set(opts, "path", filename);
2370         return opts;
2371     }
2372     if (strstart(filename, "/dev/", NULL)) {
2373         qemu_opt_set(opts, "backend", "tty");
2374         qemu_opt_set(opts, "path", filename);
2375         return opts;
2376     }
2377
2378 fail:
2379     qemu_opts_del(opts);
2380     return NULL;
2381 }
2382
2383 static const struct {
2384     const char *name;
2385     int (*open)(QemuOpts *opts, CharDriverState **chr);
2386 } backend_table[] = {
2387     { .name = "null",      .open = qemu_chr_open_null },
2388     { .name = "socket",    .open = qemu_chr_open_socket },
2389     { .name = "udp",       .open = qemu_chr_open_udp },
2390     { .name = "msmouse",   .open = qemu_chr_open_msmouse },
2391     { .name = "vc",        .open = text_console_init },
2392 #ifdef _WIN32
2393     { .name = "file",      .open = qemu_chr_open_win_file_out },
2394     { .name = "pipe",      .open = qemu_chr_open_win_pipe },
2395     { .name = "console",   .open = qemu_chr_open_win_con },
2396     { .name = "serial",    .open = qemu_chr_open_win },
2397 #else
2398     { .name = "file",      .open = qemu_chr_open_file_out },
2399     { .name = "pipe",      .open = qemu_chr_open_pipe },
2400     { .name = "pty",       .open = qemu_chr_open_pty },
2401     { .name = "stdio",     .open = qemu_chr_open_stdio },
2402 #endif
2403 #ifdef CONFIG_BRLAPI
2404     { .name = "braille",   .open = chr_baum_init },
2405 #endif
2406 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2407     || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
2408     || defined(__FreeBSD_kernel__)
2409     { .name = "tty",       .open = qemu_chr_open_tty },
2410 #endif
2411 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
2412     || defined(__FreeBSD_kernel__)
2413     { .name = "parport",   .open = qemu_chr_open_pp },
2414 #endif
2415 #ifdef CONFIG_SPICE
2416     { .name = "spicevmc",     .open = qemu_chr_open_spice },
2417 #endif
2418 };
2419
2420 CharDriverState *qemu_chr_open_opts(QemuOpts *opts,
2421                                     void (*init)(struct CharDriverState *s))
2422 {
2423     CharDriverState *chr;
2424     int i;
2425     int ret;
2426
2427     if (qemu_opts_id(opts) == NULL) {
2428         fprintf(stderr, "chardev: no id specified\n");
2429         return NULL;
2430     }
2431
2432     if (qemu_opt_get(opts, "backend") == NULL) {
2433         fprintf(stderr, "chardev: \"%s\" missing backend\n",
2434                 qemu_opts_id(opts));
2435         return NULL;
2436     }
2437     for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2438         if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2439             break;
2440     }
2441     if (i == ARRAY_SIZE(backend_table)) {
2442         fprintf(stderr, "chardev: backend \"%s\" not found\n",
2443                 qemu_opt_get(opts, "backend"));
2444         return NULL;
2445     }
2446
2447     ret = backend_table[i].open(opts, &chr);
2448     if (ret < 0) {
2449         fprintf(stderr, "chardev: opening backend \"%s\" failed: %s\n",
2450                 qemu_opt_get(opts, "backend"), strerror(-ret));
2451         return NULL;
2452     }
2453
2454     if (!chr->filename)
2455         chr->filename = qemu_strdup(qemu_opt_get(opts, "backend"));
2456     chr->init = init;
2457     QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2458
2459     chr->avail_connections = 1;
2460     chr->label = qemu_strdup(qemu_opts_id(opts));
2461     return chr;
2462 }
2463
2464 CharDriverState *qemu_chr_open(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2465 {
2466     const char *p;
2467     CharDriverState *chr;
2468     QemuOpts *opts;
2469
2470     if (strstart(filename, "chardev:", &p)) {
2471         return qemu_chr_find(p);
2472     }
2473
2474     opts = qemu_chr_parse_compat(label, filename);
2475     if (!opts)
2476         return NULL;
2477
2478     chr = qemu_chr_open_opts(opts, init);
2479     qemu_opts_del(opts);
2480     return chr;
2481 }
2482
2483 void qemu_chr_set_echo(struct CharDriverState *chr, bool echo)
2484 {
2485     if (chr->chr_set_echo) {
2486         chr->chr_set_echo(chr, echo);
2487     }
2488 }
2489
2490 void qemu_chr_fe_open(struct CharDriverState *chr)
2491 {
2492     chr->fe_opened++;
2493
2494     if (chr->chr_guest_open) {
2495         chr->chr_guest_open(chr);
2496     }
2497 }
2498
2499 void qemu_chr_fe_close(struct CharDriverState *chr)
2500 {
2501     if (chr->chr_guest_close) {
2502         chr->chr_guest_close(chr);
2503     }
2504
2505     chr->fe_opened--;
2506 }
2507
2508 void qemu_chr_close(CharDriverState *chr)
2509 {
2510     QTAILQ_REMOVE(&chardevs, chr, next);
2511     if (chr->chr_close)
2512         chr->chr_close(chr);
2513     qemu_free(chr->filename);
2514     qemu_free(chr->label);
2515     qemu_free(chr);
2516 }
2517
2518 static void qemu_chr_qlist_iter(QObject *obj, void *opaque)
2519 {
2520     QDict *chr_dict;
2521     Monitor *mon = opaque;
2522
2523     chr_dict = qobject_to_qdict(obj);
2524     monitor_printf(mon, "%s: filename=%s\n", qdict_get_str(chr_dict, "label"),
2525                                          qdict_get_str(chr_dict, "filename"));
2526 }
2527
2528 void qemu_chr_info_print(Monitor *mon, const QObject *ret_data)
2529 {
2530     qlist_iter(qobject_to_qlist(ret_data), qemu_chr_qlist_iter, mon);
2531 }
2532
2533 void qemu_chr_info(Monitor *mon, QObject **ret_data)
2534 {
2535     QList *chr_list;
2536     CharDriverState *chr;
2537
2538     chr_list = qlist_new();
2539
2540     QTAILQ_FOREACH(chr, &chardevs, next) {
2541         QObject *obj = qobject_from_jsonf("{ 'label': %s, 'filename': %s }",
2542                                           chr->label, chr->filename);
2543         qlist_append_obj(chr_list, obj);
2544     }
2545
2546     *ret_data = QOBJECT(chr_list);
2547 }
2548
2549 CharDriverState *qemu_chr_find(const char *name)
2550 {
2551     CharDriverState *chr;
2552
2553     QTAILQ_FOREACH(chr, &chardevs, next) {
2554         if (strcmp(chr->label, name) != 0)
2555             continue;
2556         return chr;
2557     }
2558     return NULL;
2559 }