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