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 "block.h"
  32 #include "hw/usb.h"
  33 #include "hw/baum.h"
  34 #include "hw/msmouse.h"
  35
  36 #include <unistd.h>
  37 #include <fcntl.h>
  38 #include <signal.h>
  39 #include <time.h>
  40 #include <errno.h>
  41 #include <sys/time.h>
  42 #include <zlib.h>
  43
  44 #ifndef _WIN32
  45 #include <sys/times.h>
  46 #include <sys/wait.h>
  47 #include <termios.h>
  48 #include <sys/mman.h>
  49 #include <sys/ioctl.h>
  50 #include <sys/resource.h>
  51 #include <sys/socket.h>
  52 #include <netinet/in.h>
  53 #include <net/if.h>
  54 #ifdef __NetBSD__
  55 #include <net/if_tap.h>
  56 #endif
  57 #ifdef __linux__
  58 #include <linux/if_tun.h>
  59 #endif
  60 #include <arpa/inet.h>
  61 #include <dirent.h>
  62 #include <netdb.h>
  63 #include <sys/select.h>
  64 #ifdef HOST_BSD
  65 #include <sys/stat.h>
  66 #ifdef __FreeBSD__
  67 #include <libutil.h>
  68 #include <dev/ppbus/ppi.h>
  69 #include <dev/ppbus/ppbconf.h>
  70 #elif defined(__DragonFly__)
  71 #include <libutil.h>
  72 #include <dev/misc/ppi/ppi.h>
  73 #include <bus/ppbus/ppbconf.h>
  74 #else
  75 #include <util.h>
  76 #endif
  77 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
  78 #include <freebsd/stdlib.h>
  79 #else
  80 #ifdef __linux__
  81 #include <pty.h>
  82
  83 #include <linux/ppdev.h>
  84 #include <linux/parport.h>
  85 #endif
  86 #ifdef __sun__
  87 #include <sys/stat.h>
  88 #include <sys/ethernet.h>
  89 #include <sys/sockio.h>
  90 #include <netinet/arp.h>
  91 #include <netinet/in.h>
  92 #include <netinet/in_systm.h>
  93 #include <netinet/ip.h>
  94 #include <netinet/ip_icmp.h> // must come after ip.h
  95 #include <netinet/udp.h>
  96 #include <netinet/tcp.h>
  97 #include <net/if.h>
  98 #include <syslog.h>
  99 #include <stropts.h>
 100 #endif
 101 #endif
 102 #endif
 103
 104 #include "qemu_socket.h"
 105
 106 /***********************************************************/
 107 /* character device */
 108
 109 static TAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
 110     TAILQ_HEAD_INITIALIZER(chardevs);
 111 static int initial_reset_issued;
 112
 113 static void qemu_chr_event(CharDriverState *s, int event)
 114 {
 115     if (!s->chr_event)
 116         return;
 117     s->chr_event(s->handler_opaque, event);
 118 }
 119
 120 static void qemu_chr_reset_bh(void *opaque)
 121 {
 122     CharDriverState *s = opaque;
 123     qemu_chr_event(s, CHR_EVENT_RESET);
 124     qemu_bh_delete(s->bh);
 125     s->bh = NULL;
 126 }
 127
 128 void qemu_chr_reset(CharDriverState *s)
 129 {
 130     if (s->bh == NULL && initial_reset_issued) {
 131         s->bh = qemu_bh_new(qemu_chr_reset_bh, s);
 132         qemu_bh_schedule(s->bh);
 133     }
 134 }
 135
 136 void qemu_chr_initial_reset(void)
 137 {
 138     CharDriverState *chr;
 139
 140     initial_reset_issued = 1;
 141
 142     TAILQ_FOREACH(chr, &chardevs, next) {
 143         qemu_chr_reset(chr);
 144     }
 145 }
 146
 147 int qemu_chr_write(CharDriverState *s, const uint8_t *buf, int len)
 148 {
 149     return s->chr_write(s, buf, len);
 150 }
 151
 152 int qemu_chr_ioctl(CharDriverState *s, int cmd, void *arg)
 153 {
 154     if (!s->chr_ioctl)
 155         return -ENOTSUP;
 156     return s->chr_ioctl(s, cmd, arg);
 157 }
 158
 159 int qemu_chr_can_read(CharDriverState *s)
 160 {
 161     if (!s->chr_can_read)
 162         return 0;
 163     return s->chr_can_read(s->handler_opaque);
 164 }
 165
 166 void qemu_chr_read(CharDriverState *s, uint8_t *buf, int len)
 167 {
 168     s->chr_read(s->handler_opaque, buf, len);
 169 }
 170
 171 void qemu_chr_accept_input(CharDriverState *s)
 172 {
 173     if (s->chr_accept_input)
 174         s->chr_accept_input(s);
 175 }
 176
 177 void qemu_chr_printf(CharDriverState *s, const char *fmt, ...)
 178 {
 179     char buf[4096];
 180     va_list ap;
 181     va_start(ap, fmt);
 182     vsnprintf(buf, sizeof(buf), fmt, ap);
 183     qemu_chr_write(s, (uint8_t *)buf, strlen(buf));
 184     va_end(ap);
 185 }
 186
 187 void qemu_chr_send_event(CharDriverState *s, int event)
 188 {
 189     if (s->chr_send_event)
 190         s->chr_send_event(s, event);
 191 }
 192
 193 void qemu_chr_add_handlers(CharDriverState *s,
 194                            IOCanRWHandler *fd_can_read,
 195                            IOReadHandler *fd_read,
 196                            IOEventHandler *fd_event,
 197                            void *opaque)
 198 {
 199     s->chr_can_read = fd_can_read;
 200     s->chr_read = fd_read;
 201     s->chr_event = fd_event;
 202     s->handler_opaque = opaque;
 203     if (s->chr_update_read_handler)
 204         s->chr_update_read_handler(s);
 205 }
 206
 207 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 208 {
 209     return len;
 210 }
 211
 212 static CharDriverState *qemu_chr_open_null(void)
 213 {
 214     CharDriverState *chr;
 215
 216     chr = qemu_mallocz(sizeof(CharDriverState));
 217     chr->chr_write = null_chr_write;
 218     return chr;
 219 }
 220
 221 /* MUX driver for serial I/O splitting */
 222 static int term_timestamps;
 223 static int64_t term_timestamps_start;
 224 #define MAX_MUX 4
 225 #define MUX_BUFFER_SIZE 32      /* Must be a power of 2.  */
 226 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
 227 typedef struct {
 228     IOCanRWHandler *chr_can_read[MAX_MUX];
 229     IOReadHandler *chr_read[MAX_MUX];
 230     IOEventHandler *chr_event[MAX_MUX];
 231     void *ext_opaque[MAX_MUX];
 232     CharDriverState *drv;
 233     int mux_cnt;
 234     int term_got_escape;
 235     int max_size;
 236     /* Intermediate input buffer allows to catch escape sequences even if the
 237        currently active device is not accepting any input - but only until it
 238        is full as well. */
 239     unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
 240     int prod[MAX_MUX];
 241     int cons[MAX_MUX];
 242 } MuxDriver;
 243
 244
 245 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 246 {
 247     MuxDriver *d = chr->opaque;
 248     int ret;
 249     if (!term_timestamps) {
 250         ret = d->drv->chr_write(d->drv, buf, len);
 251     } else {
 252         int i;
 253
 254         ret = 0;
 255         for(i = 0; i < len; i++) {
 256             ret += d->drv->chr_write(d->drv, buf+i, 1);
 257             if (buf[i] == '\n') {
 258                 char buf1[64];
 259                 int64_t ti;
 260                 int secs;
 261
 262                 ti = qemu_get_clock(rt_clock);
 263                 if (term_timestamps_start == -1)
 264                     term_timestamps_start = ti;
 265                 ti -= term_timestamps_start;
 266                 secs = ti / 1000;
 267                 snprintf(buf1, sizeof(buf1),
 268                          "[%02d:%02d:%02d.%03d] ",
 269                          secs / 3600,
 270                          (secs / 60) % 60,
 271                          secs % 60,
 272                          (int)(ti % 1000));
 273                 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
 274             }
 275         }
 276     }
 277     return ret;
 278 }
 279
 280 static const char * const mux_help[] = {
 281     "% h    print this help\n\r",
 282     "% x    exit emulator\n\r",
 283     "% s    save disk data back to file (if -snapshot)\n\r",
 284     "% t    toggle console timestamps\n\r"
 285     "% b    send break (magic sysrq)\n\r",
 286     "% c    switch between console and monitor\n\r",
 287     "% %  sends %\n\r",
 288     NULL
 289 };
 290
 291 int term_escape_char = 0x01; /* ctrl-a is used for escape */
 292 static void mux_print_help(CharDriverState *chr)
 293 {
 294     int i, j;
 295     char ebuf[15] = "Escape-Char";
 296     char cbuf[50] = "\n\r";
 297
 298     if (term_escape_char > 0 && term_escape_char < 26) {
 299         snprintf(cbuf, sizeof(cbuf), "\n\r");
 300         snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
 301     } else {
 302         snprintf(cbuf, sizeof(cbuf),
 303                  "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
 304                  term_escape_char);
 305     }
 306     chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
 307     for (i = 0; mux_help[i] != NULL; i++) {
 308         for (j=0; mux_help[i][j] != '\0'; j++) {
 309             if (mux_help[i][j] == '%')
 310                 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
 311             else
 312                 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
 313         }
 314     }
 315 }
 316
 317 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
 318 {
 319     if (d->chr_event[mux_nr])
 320         d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
 321 }
 322
 323 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
 324 {
 325     if (d->term_got_escape) {
 326         d->term_got_escape = 0;
 327         if (ch == term_escape_char)
 328             goto send_char;
 329         switch(ch) {
 330         case '?':
 331         case 'h':
 332             mux_print_help(chr);
 333             break;
 334         case 'x':
 335             {
 336                  const char *term =  "QEMU: Terminated\n\r";
 337                  chr->chr_write(chr,(uint8_t *)term,strlen(term));
 338                  exit(0);
 339                  break;
 340             }
 341         case 's':
 342             {
 343                 int i;
 344                 for (i = 0; i < nb_drives; i++) {
 345                         bdrv_commit(drives_table[i].bdrv);
 346                 }
 347             }
 348             break;
 349         case 'b':
 350             qemu_chr_event(chr, CHR_EVENT_BREAK);
 351             break;
 352         case 'c':
 353             /* Switch to the next registered device */
 354             mux_chr_send_event(d, chr->focus, CHR_EVENT_MUX_OUT);
 355             chr->focus++;
 356             if (chr->focus >= d->mux_cnt)
 357                 chr->focus = 0;
 358             mux_chr_send_event(d, chr->focus, CHR_EVENT_MUX_IN);
 359             break;
 360        case 't':
 361            term_timestamps = !term_timestamps;
 362            term_timestamps_start = -1;
 363            break;
 364         }
 365     } else if (ch == term_escape_char) {
 366         d->term_got_escape = 1;
 367     } else {
 368     send_char:
 369         return 1;
 370     }
 371     return 0;
 372 }
 373
 374 static void mux_chr_accept_input(CharDriverState *chr)
 375 {
 376     int m = chr->focus;
 377     MuxDriver *d = chr->opaque;
 378
 379     while (d->prod[m] != d->cons[m] &&
 380            d->chr_can_read[m] &&
 381            d->chr_can_read[m](d->ext_opaque[m])) {
 382         d->chr_read[m](d->ext_opaque[m],
 383                        &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
 384     }
 385 }
 386
 387 static int mux_chr_can_read(void *opaque)
 388 {
 389     CharDriverState *chr = opaque;
 390     MuxDriver *d = chr->opaque;
 391     int m = chr->focus;
 392
 393     if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
 394         return 1;
 395     if (d->chr_can_read[m])
 396         return d->chr_can_read[m](d->ext_opaque[m]);
 397     return 0;
 398 }
 399
 400 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
 401 {
 402     CharDriverState *chr = opaque;
 403     MuxDriver *d = chr->opaque;
 404     int m = chr->focus;
 405     int i;
 406
 407     mux_chr_accept_input (opaque);
 408
 409     for(i = 0; i < size; i++)
 410         if (mux_proc_byte(chr, d, buf[i])) {
 411             if (d->prod[m] == d->cons[m] &&
 412                 d->chr_can_read[m] &&
 413                 d->chr_can_read[m](d->ext_opaque[m]))
 414                 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
 415             else
 416                 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
 417         }
 418 }
 419
 420 static void mux_chr_event(void *opaque, int event)
 421 {
 422     CharDriverState *chr = opaque;
 423     MuxDriver *d = chr->opaque;
 424     int i;
 425
 426     /* Send the event to all registered listeners */
 427     for (i = 0; i < d->mux_cnt; i++)
 428         mux_chr_send_event(d, i, event);
 429 }
 430
 431 static void mux_chr_update_read_handler(CharDriverState *chr)
 432 {
 433     MuxDriver *d = chr->opaque;
 434
 435     if (d->mux_cnt >= MAX_MUX) {
 436         fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
 437         return;
 438     }
 439     d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
 440     d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
 441     d->chr_read[d->mux_cnt] = chr->chr_read;
 442     d->chr_event[d->mux_cnt] = chr->chr_event;
 443     /* Fix up the real driver with mux routines */
 444     if (d->mux_cnt == 0) {
 445         qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
 446                               mux_chr_event, chr);
 447     }
 448     chr->focus = d->mux_cnt;
 449     d->mux_cnt++;
 450 }
 451
 452 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
 453 {
 454     CharDriverState *chr;
 455     MuxDriver *d;
 456
 457     chr = qemu_mallocz(sizeof(CharDriverState));
 458     d = qemu_mallocz(sizeof(MuxDriver));
 459
 460     chr->opaque = d;
 461     d->drv = drv;
 462     chr->focus = -1;
 463     chr->chr_write = mux_chr_write;
 464     chr->chr_update_read_handler = mux_chr_update_read_handler;
 465     chr->chr_accept_input = mux_chr_accept_input;
 466     return chr;
 467 }
 468
 469
 470 #ifdef _WIN32
 471 int send_all(int fd, const void *buf, int len1)
 472 {
 473     int ret, len;
 474
 475     len = len1;
 476     while (len > 0) {
 477         ret = send(fd, buf, len, 0);
 478         if (ret < 0) {
 479             errno = WSAGetLastError();
 480             if (errno != WSAEWOULDBLOCK) {
 481                 return -1;
 482             }
 483         } else if (ret == 0) {
 484             break;
 485         } else {
 486             buf += ret;
 487             len -= ret;
 488         }
 489     }
 490     return len1 - len;
 491 }
 492
 493 #else
 494
 495 static int unix_write(int fd, const uint8_t *buf, int len1)
 496 {
 497     int ret, len;
 498
 499     len = len1;
 500     while (len > 0) {
 501         ret = write(fd, buf, len);
 502         if (ret < 0) {
 503             if (errno != EINTR && errno != EAGAIN)
 504                 return -1;
 505         } else if (ret == 0) {
 506             break;
 507         } else {
 508             buf += ret;
 509             len -= ret;
 510         }
 511     }
 512     return len1 - len;
 513 }
 514
 515 int send_all(int fd, const void *buf, int len1)
 516 {
 517     return unix_write(fd, buf, len1);
 518 }
 519 #endif /* !_WIN32 */
 520
 521 #ifndef _WIN32
 522
 523 typedef struct {
 524     int fd_in, fd_out;
 525     int max_size;
 526 } FDCharDriver;
 527
 528 #define STDIO_MAX_CLIENTS 1
 529 static int stdio_nb_clients = 0;
 530
 531 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 532 {
 533     FDCharDriver *s = chr->opaque;
 534     return send_all(s->fd_out, buf, len);
 535 }
 536
 537 static int fd_chr_read_poll(void *opaque)
 538 {
 539     CharDriverState *chr = opaque;
 540     FDCharDriver *s = chr->opaque;
 541
 542     s->max_size = qemu_chr_can_read(chr);
 543     return s->max_size;
 544 }
 545
 546 static void fd_chr_read(void *opaque)
 547 {
 548     CharDriverState *chr = opaque;
 549     FDCharDriver *s = chr->opaque;
 550     int size, len;
 551     uint8_t buf[1024];
 552
 553     len = sizeof(buf);
 554     if (len > s->max_size)
 555         len = s->max_size;
 556     if (len == 0)
 557         return;
 558     size = read(s->fd_in, buf, len);
 559     if (size == 0) {
 560         /* FD has been closed. Remove it from the active list.  */
 561         qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
 562         return;
 563     }
 564     if (size > 0) {
 565         qemu_chr_read(chr, buf, size);
 566     }
 567 }
 568
 569 static void fd_chr_update_read_handler(CharDriverState *chr)
 570 {
 571     FDCharDriver *s = chr->opaque;
 572
 573     if (s->fd_in >= 0) {
 574         if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
 575         } else {
 576             qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
 577                                  fd_chr_read, NULL, chr);
 578         }
 579     }
 580 }
 581
 582 static void fd_chr_close(struct CharDriverState *chr)
 583 {
 584     FDCharDriver *s = chr->opaque;
 585
 586     if (s->fd_in >= 0) {
 587         if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
 588         } else {
 589             qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
 590         }
 591     }
 592
 593     qemu_free(s);
 594 }
 595
 596 /* open a character device to a unix fd */
 597 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
 598 {
 599     CharDriverState *chr;
 600     FDCharDriver *s;
 601
 602     chr = qemu_mallocz(sizeof(CharDriverState));
 603     s = qemu_mallocz(sizeof(FDCharDriver));
 604     s->fd_in = fd_in;
 605     s->fd_out = fd_out;
 606     chr->opaque = s;
 607     chr->chr_write = fd_chr_write;
 608     chr->chr_update_read_handler = fd_chr_update_read_handler;
 609     chr->chr_close = fd_chr_close;
 610
 611     qemu_chr_reset(chr);
 612
 613     return chr;
 614 }
 615
 616 static CharDriverState *qemu_chr_open_file_out(const char *file_out)
 617 {
 618     int fd_out;
 619
 620     TFR(fd_out = open(file_out, O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
 621     if (fd_out < 0)
 622         return NULL;
 623     return qemu_chr_open_fd(-1, fd_out);
 624 }
 625
 626 static CharDriverState *qemu_chr_open_pipe(const char *filename)
 627 {
 628     int fd_in, fd_out;
 629     char filename_in[256], filename_out[256];
 630
 631     snprintf(filename_in, 256, "%s.in", filename);
 632     snprintf(filename_out, 256, "%s.out", filename);
 633     TFR(fd_in = open(filename_in, O_RDWR | O_BINARY));
 634     TFR(fd_out = open(filename_out, O_RDWR | O_BINARY));
 635     if (fd_in < 0 || fd_out < 0) {
 636         if (fd_in >= 0)
 637             close(fd_in);
 638         if (fd_out >= 0)
 639             close(fd_out);
 640         TFR(fd_in = fd_out = open(filename, O_RDWR | O_BINARY));
 641         if (fd_in < 0)
 642             return NULL;
 643     }
 644     return qemu_chr_open_fd(fd_in, fd_out);
 645 }
 646
 647
 648 /* for STDIO, we handle the case where several clients use it
 649    (nographic mode) */
 650
 651 #define TERM_FIFO_MAX_SIZE 1
 652
 653 static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
 654 static int term_fifo_size;
 655
 656 static int stdio_read_poll(void *opaque)
 657 {
 658     CharDriverState *chr = opaque;
 659
 660     /* try to flush the queue if needed */
 661     if (term_fifo_size != 0 && qemu_chr_can_read(chr) > 0) {
 662         qemu_chr_read(chr, term_fifo, 1);
 663         term_fifo_size = 0;
 664     }
 665     /* see if we can absorb more chars */
 666     if (term_fifo_size == 0)
 667         return 1;
 668     else
 669         return 0;
 670 }
 671
 672 static void stdio_read(void *opaque)
 673 {
 674     int size;
 675     uint8_t buf[1];
 676     CharDriverState *chr = opaque;
 677
 678     size = read(0, buf, 1);
 679     if (size == 0) {
 680         /* stdin has been closed. Remove it from the active list.  */
 681         qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
 682         return;
 683     }
 684     if (size > 0) {
 685         if (qemu_chr_can_read(chr) > 0) {
 686             qemu_chr_read(chr, buf, 1);
 687         } else if (term_fifo_size == 0) {
 688             term_fifo[term_fifo_size++] = buf[0];
 689         }
 690     }
 691 }
 692
 693 /* init terminal so that we can grab keys */
 694 static struct termios oldtty;
 695 static int old_fd0_flags;
 696 static int term_atexit_done;
 697
 698 static void term_exit(void)
 699 {
 700     tcsetattr (0, TCSANOW, &oldtty);
 701     fcntl(0, F_SETFL, old_fd0_flags);
 702 }
 703
 704 static void term_init(void)
 705 {
 706     struct termios tty;
 707
 708     tcgetattr (0, &tty);
 709     oldtty = tty;
 710     old_fd0_flags = fcntl(0, F_GETFL);
 711
 712     tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
 713                           |INLCR|IGNCR|ICRNL|IXON);
 714     tty.c_oflag |= OPOST;
 715     tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
 716     /* if graphical mode, we allow Ctrl-C handling */
 717     if (display_type == DT_NOGRAPHIC)
 718         tty.c_lflag &= ~ISIG;
 719     tty.c_cflag &= ~(CSIZE|PARENB);
 720     tty.c_cflag |= CS8;
 721     tty.c_cc[VMIN] = 1;
 722     tty.c_cc[VTIME] = 0;
 723
 724     tcsetattr (0, TCSANOW, &tty);
 725
 726     if (!term_atexit_done++)
 727         atexit(term_exit);
 728
 729     fcntl(0, F_SETFL, O_NONBLOCK);
 730 }
 731
 732 static void qemu_chr_close_stdio(struct CharDriverState *chr)
 733 {
 734     term_exit();
 735     stdio_nb_clients--;
 736     qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
 737     fd_chr_close(chr);
 738 }
 739
 740 static CharDriverState *qemu_chr_open_stdio(void)
 741 {
 742     CharDriverState *chr;
 743
 744     if (stdio_nb_clients >= STDIO_MAX_CLIENTS)
 745         return NULL;
 746     chr = qemu_chr_open_fd(0, 1);
 747     chr->chr_close = qemu_chr_close_stdio;
 748     qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
 749     stdio_nb_clients++;
 750     term_init();
 751
 752     return chr;
 753 }
 754
 755 #ifdef __sun__
 756 /* Once Solaris has openpty(), this is going to be removed. */
 757 static int openpty(int *amaster, int *aslave, char *name,
 758                    struct termios *termp, struct winsize *winp)
 759 {
 760         const char *slave;
 761         int mfd = -1, sfd = -1;
 762
 763         *amaster = *aslave = -1;
 764
 765         mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
 766         if (mfd < 0)
 767                 goto err;
 768
 769         if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
 770                 goto err;
 771
 772         if ((slave = ptsname(mfd)) == NULL)
 773                 goto err;
 774
 775         if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
 776                 goto err;
 777
 778         if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
 779             (termp != NULL && tcgetattr(sfd, termp) < 0))
 780                 goto err;
 781
 782         if (amaster)
 783                 *amaster = mfd;
 784         if (aslave)
 785                 *aslave = sfd;
 786         if (winp)
 787                 ioctl(sfd, TIOCSWINSZ, winp);
 788
 789         return 0;
 790
 791 err:
 792         if (sfd != -1)
 793                 close(sfd);
 794         close(mfd);
 795         return -1;
 796 }
 797
 798 static void cfmakeraw (struct termios *termios_p)
 799 {
 800         termios_p->c_iflag &=
 801                 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
 802         termios_p->c_oflag &= ~OPOST;
 803         termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
 804         termios_p->c_cflag &= ~(CSIZE|PARENB);
 805         termios_p->c_cflag |= CS8;
 806
 807         termios_p->c_cc[VMIN] = 0;
 808         termios_p->c_cc[VTIME] = 0;
 809 }
 810 #endif
 811
 812 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
 813     || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
 814
 815 typedef struct {
 816     int fd;
 817     int connected;
 818     int polling;
 819     int read_bytes;
 820     QEMUTimer *timer;
 821 } PtyCharDriver;
 822
 823 static void pty_chr_update_read_handler(CharDriverState *chr);
 824 static void pty_chr_state(CharDriverState *chr, int connected);
 825
 826 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 827 {
 828     PtyCharDriver *s = chr->opaque;
 829
 830     if (!s->connected) {
 831         /* guest sends data, check for (re-)connect */
 832         pty_chr_update_read_handler(chr);
 833         return 0;
 834     }
 835     return send_all(s->fd, buf, len);
 836 }
 837
 838 static int pty_chr_read_poll(void *opaque)
 839 {
 840     CharDriverState *chr = opaque;
 841     PtyCharDriver *s = chr->opaque;
 842
 843     s->read_bytes = qemu_chr_can_read(chr);
 844     return s->read_bytes;
 845 }
 846
 847 static void pty_chr_read(void *opaque)
 848 {
 849     CharDriverState *chr = opaque;
 850     PtyCharDriver *s = chr->opaque;
 851     int size, len;
 852     uint8_t buf[1024];
 853
 854     len = sizeof(buf);
 855     if (len > s->read_bytes)
 856         len = s->read_bytes;
 857     if (len == 0)
 858         return;
 859     size = read(s->fd, buf, len);
 860     if ((size == -1 && errno == EIO) ||
 861         (size == 0)) {
 862         pty_chr_state(chr, 0);
 863         return;
 864     }
 865     if (size > 0) {
 866         pty_chr_state(chr, 1);
 867         qemu_chr_read(chr, buf, size);
 868     }
 869 }
 870
 871 static void pty_chr_update_read_handler(CharDriverState *chr)
 872 {
 873     PtyCharDriver *s = chr->opaque;
 874
 875     qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
 876                          pty_chr_read, NULL, chr);
 877     s->polling = 1;
 878     /*
 879      * Short timeout here: just need wait long enougth that qemu makes
 880      * it through the poll loop once.  When reconnected we want a
 881      * short timeout so we notice it almost instantly.  Otherwise
 882      * read() gives us -EIO instantly, making pty_chr_state() reset the
 883      * timeout to the normal (much longer) poll interval before the
 884      * timer triggers.
 885      */
 886     qemu_mod_timer(s->timer, qemu_get_clock(rt_clock) + 10);
 887 }
 888
 889 static void pty_chr_state(CharDriverState *chr, int connected)
 890 {
 891     PtyCharDriver *s = chr->opaque;
 892
 893     if (!connected) {
 894         qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
 895         s->connected = 0;
 896         s->polling = 0;
 897         /* (re-)connect poll interval for idle guests: once per second.
 898          * We check more frequently in case the guests sends data to
 899          * the virtual device linked to our pty. */
 900         qemu_mod_timer(s->timer, qemu_get_clock(rt_clock) + 1000);
 901     } else {
 902         if (!s->connected)
 903             qemu_chr_reset(chr);
 904         s->connected = 1;
 905     }
 906 }
 907
 908 static void pty_chr_timer(void *opaque)
 909 {
 910     struct CharDriverState *chr = opaque;
 911     PtyCharDriver *s = chr->opaque;
 912
 913     if (s->connected)
 914         return;
 915     if (s->polling) {
 916         /* If we arrive here without polling being cleared due
 917          * read returning -EIO, then we are (re-)connected */
 918         pty_chr_state(chr, 1);
 919         return;
 920     }
 921
 922     /* Next poll ... */
 923     pty_chr_update_read_handler(chr);
 924 }
 925
 926 static void pty_chr_close(struct CharDriverState *chr)
 927 {
 928     PtyCharDriver *s = chr->opaque;
 929
 930     qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
 931     close(s->fd);
 932     qemu_del_timer(s->timer);
 933     qemu_free_timer(s->timer);
 934     qemu_free(s);
 935 }
 936
 937 static CharDriverState *qemu_chr_open_pty(void)
 938 {
 939     CharDriverState *chr;
 940     PtyCharDriver *s;
 941     struct termios tty;
 942     int slave_fd, len;
 943 #if defined(__OpenBSD__) || defined(__DragonFly__)
 944     char pty_name[PATH_MAX];
 945 #define q_ptsname(x) pty_name
 946 #else
 947     char *pty_name = NULL;
 948 #define q_ptsname(x) ptsname(x)
 949 #endif
 950
 951     chr = qemu_mallocz(sizeof(CharDriverState));
 952     s = qemu_mallocz(sizeof(PtyCharDriver));
 953
 954     if (openpty(&s->fd, &slave_fd, pty_name, NULL, NULL) < 0) {
 955         return NULL;
 956     }
 957
 958     /* Set raw attributes on the pty. */
 959     tcgetattr(slave_fd, &tty);
 960     cfmakeraw(&tty);
 961     tcsetattr(slave_fd, TCSAFLUSH, &tty);
 962     close(slave_fd);
 963
 964     len = strlen(q_ptsname(s->fd)) + 5;
 965     chr->filename = qemu_malloc(len);
 966     snprintf(chr->filename, len, "pty:%s", q_ptsname(s->fd));
 967     fprintf(stderr, "char device redirected to %s\n", q_ptsname(s->fd));
 968
 969     chr->opaque = s;
 970     chr->chr_write = pty_chr_write;
 971     chr->chr_update_read_handler = pty_chr_update_read_handler;
 972     chr->chr_close = pty_chr_close;
 973
 974     s->timer = qemu_new_timer(rt_clock, pty_chr_timer, chr);
 975
 976     return chr;
 977 }
 978
 979 static void tty_serial_init(int fd, int speed,
 980                             int parity, int data_bits, int stop_bits)
 981 {
 982     struct termios tty;
 983     speed_t spd;
 984
 985 #if 0
 986     printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
 987            speed, parity, data_bits, stop_bits);
 988 #endif
 989     tcgetattr (fd, &tty);
 990
 991 #define MARGIN 1.1
 992     if (speed <= 50 * MARGIN)
 993         spd = B50;
 994     else if (speed <= 75 * MARGIN)
 995         spd = B75;
 996     else if (speed <= 300 * MARGIN)
 997         spd = B300;
 998     else if (speed <= 600 * MARGIN)
 999         spd = B600;
1000     else if (speed <= 1200 * MARGIN)
1001         spd = B1200;
1002     else if (speed <= 2400 * MARGIN)
1003         spd = B2400;
1004     else if (speed <= 4800 * MARGIN)
1005         spd = B4800;
1006     else if (speed <= 9600 * MARGIN)
1007         spd = B9600;
1008     else if (speed <= 19200 * MARGIN)
1009         spd = B19200;
1010     else if (speed <= 38400 * MARGIN)
1011         spd = B38400;
1012     else if (speed <= 57600 * MARGIN)
1013         spd = B57600;
1014     else if (speed <= 115200 * MARGIN)
1015         spd = B115200;
1016     else
1017         spd = B115200;
1018
1019     cfsetispeed(&tty, spd);
1020     cfsetospeed(&tty, spd);
1021
1022     tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1023                           |INLCR|IGNCR|ICRNL|IXON);
1024     tty.c_oflag |= OPOST;
1025     tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1026     tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1027     switch(data_bits) {
1028     default:
1029     case 8:
1030         tty.c_cflag |= CS8;
1031         break;
1032     case 7:
1033         tty.c_cflag |= CS7;
1034         break;
1035     case 6:
1036         tty.c_cflag |= CS6;
1037         break;
1038     case 5:
1039         tty.c_cflag |= CS5;
1040         break;
1041     }
1042     switch(parity) {
1043     default:
1044     case 'N':
1045         break;
1046     case 'E':
1047         tty.c_cflag |= PARENB;
1048         break;
1049     case 'O':
1050         tty.c_cflag |= PARENB | PARODD;
1051         break;
1052     }
1053     if (stop_bits == 2)
1054         tty.c_cflag |= CSTOPB;
1055
1056     tcsetattr (fd, TCSANOW, &tty);
1057 }
1058
1059 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1060 {
1061     FDCharDriver *s = chr->opaque;
1062
1063     switch(cmd) {
1064     case CHR_IOCTL_SERIAL_SET_PARAMS:
1065         {
1066             QEMUSerialSetParams *ssp = arg;
1067             tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1068                             ssp->data_bits, ssp->stop_bits);
1069         }
1070         break;
1071     case CHR_IOCTL_SERIAL_SET_BREAK:
1072         {
1073             int enable = *(int *)arg;
1074             if (enable)
1075                 tcsendbreak(s->fd_in, 1);
1076         }
1077         break;
1078     case CHR_IOCTL_SERIAL_GET_TIOCM:
1079         {
1080             int sarg = 0;
1081             int *targ = (int *)arg;
1082             ioctl(s->fd_in, TIOCMGET, &sarg);
1083             *targ = 0;
1084             if (sarg & TIOCM_CTS)
1085                 *targ |= CHR_TIOCM_CTS;
1086             if (sarg & TIOCM_CAR)
1087                 *targ |= CHR_TIOCM_CAR;
1088             if (sarg & TIOCM_DSR)
1089                 *targ |= CHR_TIOCM_DSR;
1090             if (sarg & TIOCM_RI)
1091                 *targ |= CHR_TIOCM_RI;
1092             if (sarg & TIOCM_DTR)
1093                 *targ |= CHR_TIOCM_DTR;
1094             if (sarg & TIOCM_RTS)
1095                 *targ |= CHR_TIOCM_RTS;
1096         }
1097         break;
1098     case CHR_IOCTL_SERIAL_SET_TIOCM:
1099         {
1100             int sarg = *(int *)arg;
1101             int targ = 0;
1102             ioctl(s->fd_in, TIOCMGET, &targ);
1103             targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1104                      | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1105             if (sarg & CHR_TIOCM_CTS)
1106                 targ |= TIOCM_CTS;
1107             if (sarg & CHR_TIOCM_CAR)
1108                 targ |= TIOCM_CAR;
1109             if (sarg & CHR_TIOCM_DSR)
1110                 targ |= TIOCM_DSR;
1111             if (sarg & CHR_TIOCM_RI)
1112                 targ |= TIOCM_RI;
1113             if (sarg & CHR_TIOCM_DTR)
1114                 targ |= TIOCM_DTR;
1115             if (sarg & CHR_TIOCM_RTS)
1116                 targ |= TIOCM_RTS;
1117             ioctl(s->fd_in, TIOCMSET, &targ);
1118         }
1119         break;
1120     default:
1121         return -ENOTSUP;
1122     }
1123     return 0;
1124 }
1125
1126 static CharDriverState *qemu_chr_open_tty(const char *filename)
1127 {
1128     CharDriverState *chr;
1129     int fd;
1130
1131     TFR(fd = open(filename, O_RDWR | O_NONBLOCK));
1132     tty_serial_init(fd, 115200, 'N', 8, 1);
1133     chr = qemu_chr_open_fd(fd, fd);
1134     if (!chr) {
1135         close(fd);
1136         return NULL;
1137     }
1138     chr->chr_ioctl = tty_serial_ioctl;
1139     qemu_chr_reset(chr);
1140     return chr;
1141 }
1142 #else  /* ! __linux__ && ! __sun__ */
1143 static CharDriverState *qemu_chr_open_pty(void)
1144 {
1145     return NULL;
1146 }
1147 #endif /* __linux__ || __sun__ */
1148
1149 #if defined(__linux__)
1150 typedef struct {
1151     int fd;
1152     int mode;
1153 } ParallelCharDriver;
1154
1155 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1156 {
1157     if (s->mode != mode) {
1158         int m = mode;
1159         if (ioctl(s->fd, PPSETMODE, &m) < 0)
1160             return 0;
1161         s->mode = mode;
1162     }
1163     return 1;
1164 }
1165
1166 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1167 {
1168     ParallelCharDriver *drv = chr->opaque;
1169     int fd = drv->fd;
1170     uint8_t b;
1171
1172     switch(cmd) {
1173     case CHR_IOCTL_PP_READ_DATA:
1174         if (ioctl(fd, PPRDATA, &b) < 0)
1175             return -ENOTSUP;
1176         *(uint8_t *)arg = b;
1177         break;
1178     case CHR_IOCTL_PP_WRITE_DATA:
1179         b = *(uint8_t *)arg;
1180         if (ioctl(fd, PPWDATA, &b) < 0)
1181             return -ENOTSUP;
1182         break;
1183     case CHR_IOCTL_PP_READ_CONTROL:
1184         if (ioctl(fd, PPRCONTROL, &b) < 0)
1185             return -ENOTSUP;
1186         /* Linux gives only the lowest bits, and no way to know data
1187            direction! For better compatibility set the fixed upper
1188            bits. */
1189         *(uint8_t *)arg = b | 0xc0;
1190         break;
1191     case CHR_IOCTL_PP_WRITE_CONTROL:
1192         b = *(uint8_t *)arg;
1193         if (ioctl(fd, PPWCONTROL, &b) < 0)
1194             return -ENOTSUP;
1195         break;
1196     case CHR_IOCTL_PP_READ_STATUS:
1197         if (ioctl(fd, PPRSTATUS, &b) < 0)
1198             return -ENOTSUP;
1199         *(uint8_t *)arg = b;
1200         break;
1201     case CHR_IOCTL_PP_DATA_DIR:
1202         if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1203             return -ENOTSUP;
1204         break;
1205     case CHR_IOCTL_PP_EPP_READ_ADDR:
1206         if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1207             struct ParallelIOArg *parg = arg;
1208             int n = read(fd, parg->buffer, parg->count);
1209             if (n != parg->count) {
1210                 return -EIO;
1211             }
1212         }
1213         break;
1214     case CHR_IOCTL_PP_EPP_READ:
1215         if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1216             struct ParallelIOArg *parg = arg;
1217             int n = read(fd, parg->buffer, parg->count);
1218             if (n != parg->count) {
1219                 return -EIO;
1220             }
1221         }
1222         break;
1223     case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1224         if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1225             struct ParallelIOArg *parg = arg;
1226             int n = write(fd, parg->buffer, parg->count);
1227             if (n != parg->count) {
1228                 return -EIO;
1229             }
1230         }
1231         break;
1232     case CHR_IOCTL_PP_EPP_WRITE:
1233         if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1234             struct ParallelIOArg *parg = arg;
1235             int n = write(fd, parg->buffer, parg->count);
1236             if (n != parg->count) {
1237                 return -EIO;
1238             }
1239         }
1240         break;
1241     default:
1242         return -ENOTSUP;
1243     }
1244     return 0;
1245 }
1246
1247 static void pp_close(CharDriverState *chr)
1248 {
1249     ParallelCharDriver *drv = chr->opaque;
1250     int fd = drv->fd;
1251
1252     pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1253     ioctl(fd, PPRELEASE);
1254     close(fd);
1255     qemu_free(drv);
1256 }
1257
1258 static CharDriverState *qemu_chr_open_pp(const char *filename)
1259 {
1260     CharDriverState *chr;
1261     ParallelCharDriver *drv;
1262     int fd;
1263
1264     TFR(fd = open(filename, O_RDWR));
1265     if (fd < 0)
1266         return NULL;
1267
1268     if (ioctl(fd, PPCLAIM) < 0) {
1269         close(fd);
1270         return NULL;
1271     }
1272
1273     drv = qemu_mallocz(sizeof(ParallelCharDriver));
1274     drv->fd = fd;
1275     drv->mode = IEEE1284_MODE_COMPAT;
1276
1277     chr = qemu_mallocz(sizeof(CharDriverState));
1278     chr->chr_write = null_chr_write;
1279     chr->chr_ioctl = pp_ioctl;
1280     chr->chr_close = pp_close;
1281     chr->opaque = drv;
1282
1283     qemu_chr_reset(chr);
1284
1285     return chr;
1286 }
1287 #endif /* __linux__ */
1288
1289 #if defined(__FreeBSD__) || defined(__DragonFly__)
1290 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1291 {
1292     int fd = (int)chr->opaque;
1293     uint8_t b;
1294
1295     switch(cmd) {
1296     case CHR_IOCTL_PP_READ_DATA:
1297         if (ioctl(fd, PPIGDATA, &b) < 0)
1298             return -ENOTSUP;
1299         *(uint8_t *)arg = b;
1300         break;
1301     case CHR_IOCTL_PP_WRITE_DATA:
1302         b = *(uint8_t *)arg;
1303         if (ioctl(fd, PPISDATA, &b) < 0)
1304             return -ENOTSUP;
1305         break;
1306     case CHR_IOCTL_PP_READ_CONTROL:
1307         if (ioctl(fd, PPIGCTRL, &b) < 0)
1308             return -ENOTSUP;
1309         *(uint8_t *)arg = b;
1310         break;
1311     case CHR_IOCTL_PP_WRITE_CONTROL:
1312         b = *(uint8_t *)arg;
1313         if (ioctl(fd, PPISCTRL, &b) < 0)
1314             return -ENOTSUP;
1315         break;
1316     case CHR_IOCTL_PP_READ_STATUS:
1317         if (ioctl(fd, PPIGSTATUS, &b) < 0)
1318             return -ENOTSUP;
1319         *(uint8_t *)arg = b;
1320         break;
1321     default:
1322         return -ENOTSUP;
1323     }
1324     return 0;
1325 }
1326
1327 static CharDriverState *qemu_chr_open_pp(const char *filename)
1328 {
1329     CharDriverState *chr;
1330     int fd;
1331
1332     fd = open(filename, O_RDWR);
1333     if (fd < 0)
1334         return NULL;
1335
1336     chr = qemu_mallocz(sizeof(CharDriverState));
1337     chr->opaque = (void *)fd;
1338     chr->chr_write = null_chr_write;
1339     chr->chr_ioctl = pp_ioctl;
1340     return chr;
1341 }
1342 #endif
1343
1344 #else /* _WIN32 */
1345
1346 typedef struct {
1347     int max_size;
1348     HANDLE hcom, hrecv, hsend;
1349     OVERLAPPED orecv, osend;
1350     BOOL fpipe;
1351     DWORD len;
1352 } WinCharState;
1353
1354 #define NSENDBUF 2048
1355 #define NRECVBUF 2048
1356 #define MAXCONNECT 1
1357 #define NTIMEOUT 5000
1358
1359 static int win_chr_poll(void *opaque);
1360 static int win_chr_pipe_poll(void *opaque);
1361
1362 static void win_chr_close(CharDriverState *chr)
1363 {
1364     WinCharState *s = chr->opaque;
1365
1366     if (s->hsend) {
1367         CloseHandle(s->hsend);
1368         s->hsend = NULL;
1369     }
1370     if (s->hrecv) {
1371         CloseHandle(s->hrecv);
1372         s->hrecv = NULL;
1373     }
1374     if (s->hcom) {
1375         CloseHandle(s->hcom);
1376         s->hcom = NULL;
1377     }
1378     if (s->fpipe)
1379         qemu_del_polling_cb(win_chr_pipe_poll, chr);
1380     else
1381         qemu_del_polling_cb(win_chr_poll, chr);
1382 }
1383
1384 static int win_chr_init(CharDriverState *chr, const char *filename)
1385 {
1386     WinCharState *s = chr->opaque;
1387     COMMCONFIG comcfg;
1388     COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1389     COMSTAT comstat;
1390     DWORD size;
1391     DWORD err;
1392
1393     s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1394     if (!s->hsend) {
1395         fprintf(stderr, "Failed CreateEvent\n");
1396         goto fail;
1397     }
1398     s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1399     if (!s->hrecv) {
1400         fprintf(stderr, "Failed CreateEvent\n");
1401         goto fail;
1402     }
1403
1404     s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1405                       OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1406     if (s->hcom == INVALID_HANDLE_VALUE) {
1407         fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1408         s->hcom = NULL;
1409         goto fail;
1410     }
1411
1412     if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1413         fprintf(stderr, "Failed SetupComm\n");
1414         goto fail;
1415     }
1416
1417     ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1418     size = sizeof(COMMCONFIG);
1419     GetDefaultCommConfig(filename, &comcfg, &size);
1420     comcfg.dcb.DCBlength = sizeof(DCB);
1421     CommConfigDialog(filename, NULL, &comcfg);
1422
1423     if (!SetCommState(s->hcom, &comcfg.dcb)) {
1424         fprintf(stderr, "Failed SetCommState\n");
1425         goto fail;
1426     }
1427
1428     if (!SetCommMask(s->hcom, EV_ERR)) {
1429         fprintf(stderr, "Failed SetCommMask\n");
1430         goto fail;
1431     }
1432
1433     cto.ReadIntervalTimeout = MAXDWORD;
1434     if (!SetCommTimeouts(s->hcom, &cto)) {
1435         fprintf(stderr, "Failed SetCommTimeouts\n");
1436         goto fail;
1437     }
1438
1439     if (!ClearCommError(s->hcom, &err, &comstat)) {
1440         fprintf(stderr, "Failed ClearCommError\n");
1441         goto fail;
1442     }
1443     qemu_add_polling_cb(win_chr_poll, chr);
1444     return 0;
1445
1446  fail:
1447     win_chr_close(chr);
1448     return -1;
1449 }
1450
1451 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1452 {
1453     WinCharState *s = chr->opaque;
1454     DWORD len, ret, size, err;
1455
1456     len = len1;
1457     ZeroMemory(&s->osend, sizeof(s->osend));
1458     s->osend.hEvent = s->hsend;
1459     while (len > 0) {
1460         if (s->hsend)
1461             ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1462         else
1463             ret = WriteFile(s->hcom, buf, len, &size, NULL);
1464         if (!ret) {
1465             err = GetLastError();
1466             if (err == ERROR_IO_PENDING) {
1467                 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1468                 if (ret) {
1469                     buf += size;
1470                     len -= size;
1471                 } else {
1472                     break;
1473                 }
1474             } else {
1475                 break;
1476             }
1477         } else {
1478             buf += size;
1479             len -= size;
1480         }
1481     }
1482     return len1 - len;
1483 }
1484
1485 static int win_chr_read_poll(CharDriverState *chr)
1486 {
1487     WinCharState *s = chr->opaque;
1488
1489     s->max_size = qemu_chr_can_read(chr);
1490     return s->max_size;
1491 }
1492
1493 static void win_chr_readfile(CharDriverState *chr)
1494 {
1495     WinCharState *s = chr->opaque;
1496     int ret, err;
1497     uint8_t buf[1024];
1498     DWORD size;
1499
1500     ZeroMemory(&s->orecv, sizeof(s->orecv));
1501     s->orecv.hEvent = s->hrecv;
1502     ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1503     if (!ret) {
1504         err = GetLastError();
1505         if (err == ERROR_IO_PENDING) {
1506             ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1507         }
1508     }
1509
1510     if (size > 0) {
1511         qemu_chr_read(chr, buf, size);
1512     }
1513 }
1514
1515 static void win_chr_read(CharDriverState *chr)
1516 {
1517     WinCharState *s = chr->opaque;
1518
1519     if (s->len > s->max_size)
1520         s->len = s->max_size;
1521     if (s->len == 0)
1522         return;
1523
1524     win_chr_readfile(chr);
1525 }
1526
1527 static int win_chr_poll(void *opaque)
1528 {
1529     CharDriverState *chr = opaque;
1530     WinCharState *s = chr->opaque;
1531     COMSTAT status;
1532     DWORD comerr;
1533
1534     ClearCommError(s->hcom, &comerr, &status);
1535     if (status.cbInQue > 0) {
1536         s->len = status.cbInQue;
1537         win_chr_read_poll(chr);
1538         win_chr_read(chr);
1539         return 1;
1540     }
1541     return 0;
1542 }
1543
1544 static CharDriverState *qemu_chr_open_win(const char *filename)
1545 {
1546     CharDriverState *chr;
1547     WinCharState *s;
1548
1549     chr = qemu_mallocz(sizeof(CharDriverState));
1550     s = qemu_mallocz(sizeof(WinCharState));
1551     chr->opaque = s;
1552     chr->chr_write = win_chr_write;
1553     chr->chr_close = win_chr_close;
1554
1555     if (win_chr_init(chr, filename) < 0) {
1556         free(s);
1557         free(chr);
1558         return NULL;
1559     }
1560     qemu_chr_reset(chr);
1561     return chr;
1562 }
1563
1564 static int win_chr_pipe_poll(void *opaque)
1565 {
1566     CharDriverState *chr = opaque;
1567     WinCharState *s = chr->opaque;
1568     DWORD size;
1569
1570     PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1571     if (size > 0) {
1572         s->len = size;
1573         win_chr_read_poll(chr);
1574         win_chr_read(chr);
1575         return 1;
1576     }
1577     return 0;
1578 }
1579
1580 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1581 {
1582     WinCharState *s = chr->opaque;
1583     OVERLAPPED ov;
1584     int ret;
1585     DWORD size;
1586     char openname[256];
1587
1588     s->fpipe = TRUE;
1589
1590     s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1591     if (!s->hsend) {
1592         fprintf(stderr, "Failed CreateEvent\n");
1593         goto fail;
1594     }
1595     s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1596     if (!s->hrecv) {
1597         fprintf(stderr, "Failed CreateEvent\n");
1598         goto fail;
1599     }
1600
1601     snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1602     s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1603                               PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1604                               PIPE_WAIT,
1605                               MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1606     if (s->hcom == INVALID_HANDLE_VALUE) {
1607         fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1608         s->hcom = NULL;
1609         goto fail;
1610     }
1611
1612     ZeroMemory(&ov, sizeof(ov));
1613     ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1614     ret = ConnectNamedPipe(s->hcom, &ov);
1615     if (ret) {
1616         fprintf(stderr, "Failed ConnectNamedPipe\n");
1617         goto fail;
1618     }
1619
1620     ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1621     if (!ret) {
1622         fprintf(stderr, "Failed GetOverlappedResult\n");
1623         if (ov.hEvent) {
1624             CloseHandle(ov.hEvent);
1625             ov.hEvent = NULL;
1626         }
1627         goto fail;
1628     }
1629
1630     if (ov.hEvent) {
1631         CloseHandle(ov.hEvent);
1632         ov.hEvent = NULL;
1633     }
1634     qemu_add_polling_cb(win_chr_pipe_poll, chr);
1635     return 0;
1636
1637  fail:
1638     win_chr_close(chr);
1639     return -1;
1640 }
1641
1642
1643 static CharDriverState *qemu_chr_open_win_pipe(const char *filename)
1644 {
1645     CharDriverState *chr;
1646     WinCharState *s;
1647
1648     chr = qemu_mallocz(sizeof(CharDriverState));
1649     s = qemu_mallocz(sizeof(WinCharState));
1650     chr->opaque = s;
1651     chr->chr_write = win_chr_write;
1652     chr->chr_close = win_chr_close;
1653
1654     if (win_chr_pipe_init(chr, filename) < 0) {
1655         free(s);
1656         free(chr);
1657         return NULL;
1658     }
1659     qemu_chr_reset(chr);
1660     return chr;
1661 }
1662
1663 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1664 {
1665     CharDriverState *chr;
1666     WinCharState *s;
1667
1668     chr = qemu_mallocz(sizeof(CharDriverState));
1669     s = qemu_mallocz(sizeof(WinCharState));
1670     s->hcom = fd_out;
1671     chr->opaque = s;
1672     chr->chr_write = win_chr_write;
1673     qemu_chr_reset(chr);
1674     return chr;
1675 }
1676
1677 static CharDriverState *qemu_chr_open_win_con(const char *filename)
1678 {
1679     return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1680 }
1681
1682 static CharDriverState *qemu_chr_open_win_file_out(const char *file_out)
1683 {
1684     HANDLE fd_out;
1685
1686     fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1687                         OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1688     if (fd_out == INVALID_HANDLE_VALUE)
1689         return NULL;
1690
1691     return qemu_chr_open_win_file(fd_out);
1692 }
1693 #endif /* !_WIN32 */
1694
1695 /***********************************************************/
1696 /* UDP Net console */
1697
1698 typedef struct {
1699     int fd;
1700     struct sockaddr_in daddr;
1701     uint8_t buf[1024];
1702     int bufcnt;
1703     int bufptr;
1704     int max_size;
1705 } NetCharDriver;
1706
1707 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1708 {
1709     NetCharDriver *s = chr->opaque;
1710
1711     return sendto(s->fd, (const void *)buf, len, 0,
1712                   (struct sockaddr *)&s->daddr, sizeof(struct sockaddr_in));
1713 }
1714
1715 static int udp_chr_read_poll(void *opaque)
1716 {
1717     CharDriverState *chr = opaque;
1718     NetCharDriver *s = chr->opaque;
1719
1720     s->max_size = qemu_chr_can_read(chr);
1721
1722     /* If there were any stray characters in the queue process them
1723      * first
1724      */
1725     while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1726         qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1727         s->bufptr++;
1728         s->max_size = qemu_chr_can_read(chr);
1729     }
1730     return s->max_size;
1731 }
1732
1733 static void udp_chr_read(void *opaque)
1734 {
1735     CharDriverState *chr = opaque;
1736     NetCharDriver *s = chr->opaque;
1737
1738     if (s->max_size == 0)
1739         return;
1740     s->bufcnt = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1741     s->bufptr = s->bufcnt;
1742     if (s->bufcnt <= 0)
1743         return;
1744
1745     s->bufptr = 0;
1746     while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1747         qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1748         s->bufptr++;
1749         s->max_size = qemu_chr_can_read(chr);
1750     }
1751 }
1752
1753 static void udp_chr_update_read_handler(CharDriverState *chr)
1754 {
1755     NetCharDriver *s = chr->opaque;
1756
1757     if (s->fd >= 0) {
1758         qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
1759                              udp_chr_read, NULL, chr);
1760     }
1761 }
1762
1763 static void udp_chr_close(CharDriverState *chr)
1764 {
1765     NetCharDriver *s = chr->opaque;
1766     if (s->fd >= 0) {
1767         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1768         closesocket(s->fd);
1769     }
1770     qemu_free(s);
1771 }
1772
1773 static CharDriverState *qemu_chr_open_udp(const char *def)
1774 {
1775     CharDriverState *chr = NULL;
1776     NetCharDriver *s = NULL;
1777     int fd = -1;
1778     struct sockaddr_in saddr;
1779
1780     chr = qemu_mallocz(sizeof(CharDriverState));
1781     s = qemu_mallocz(sizeof(NetCharDriver));
1782
1783     fd = socket(PF_INET, SOCK_DGRAM, 0);
1784     if (fd < 0) {
1785         perror("socket(PF_INET, SOCK_DGRAM)");
1786         goto return_err;
1787     }
1788
1789     if (parse_host_src_port(&s->daddr, &saddr, def) < 0) {
1790         printf("Could not parse: %s\n", def);
1791         goto return_err;
1792     }
1793
1794     if (bind(fd, (struct sockaddr *)&saddr, sizeof(saddr)) < 0)
1795     {
1796         perror("bind");
1797         goto return_err;
1798     }
1799
1800     s->fd = fd;
1801     s->bufcnt = 0;
1802     s->bufptr = 0;
1803     chr->opaque = s;
1804     chr->chr_write = udp_chr_write;
1805     chr->chr_update_read_handler = udp_chr_update_read_handler;
1806     chr->chr_close = udp_chr_close;
1807     return chr;
1808
1809 return_err:
1810     if (chr)
1811         free(chr);
1812     if (s)
1813         free(s);
1814     if (fd >= 0)
1815         closesocket(fd);
1816     return NULL;
1817 }
1818
1819 /***********************************************************/
1820 /* TCP Net console */
1821
1822 typedef struct {
1823     int fd, listen_fd;
1824     int connected;
1825     int max_size;
1826     int do_telnetopt;
1827     int do_nodelay;
1828     int is_unix;
1829 } TCPCharDriver;
1830
1831 static void tcp_chr_accept(void *opaque);
1832
1833 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1834 {
1835     TCPCharDriver *s = chr->opaque;
1836     if (s->connected) {
1837         return send_all(s->fd, buf, len);
1838     } else {
1839         /* XXX: indicate an error ? */
1840         return len;
1841     }
1842 }
1843
1844 static int tcp_chr_read_poll(void *opaque)
1845 {
1846     CharDriverState *chr = opaque;
1847     TCPCharDriver *s = chr->opaque;
1848     if (!s->connected)
1849         return 0;
1850     s->max_size = qemu_chr_can_read(chr);
1851     return s->max_size;
1852 }
1853
1854 #define IAC 255
1855 #define IAC_BREAK 243
1856 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
1857                                       TCPCharDriver *s,
1858                                       uint8_t *buf, int *size)
1859 {
1860     /* Handle any telnet client's basic IAC options to satisfy char by
1861      * char mode with no echo.  All IAC options will be removed from
1862      * the buf and the do_telnetopt variable will be used to track the
1863      * state of the width of the IAC information.
1864      *
1865      * IAC commands come in sets of 3 bytes with the exception of the
1866      * "IAC BREAK" command and the double IAC.
1867      */
1868
1869     int i;
1870     int j = 0;
1871
1872     for (i = 0; i < *size; i++) {
1873         if (s->do_telnetopt > 1) {
1874             if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
1875                 /* Double IAC means send an IAC */
1876                 if (j != i)
1877                     buf[j] = buf[i];
1878                 j++;
1879                 s->do_telnetopt = 1;
1880             } else {
1881                 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
1882                     /* Handle IAC break commands by sending a serial break */
1883                     qemu_chr_event(chr, CHR_EVENT_BREAK);
1884                     s->do_telnetopt++;
1885                 }
1886                 s->do_telnetopt++;
1887             }
1888             if (s->do_telnetopt >= 4) {
1889                 s->do_telnetopt = 1;
1890             }
1891         } else {
1892             if ((unsigned char)buf[i] == IAC) {
1893                 s->do_telnetopt = 2;
1894             } else {
1895                 if (j != i)
1896                     buf[j] = buf[i];
1897                 j++;
1898             }
1899         }
1900     }
1901     *size = j;
1902 }
1903
1904 static void tcp_chr_read(void *opaque)
1905 {
1906     CharDriverState *chr = opaque;
1907     TCPCharDriver *s = chr->opaque;
1908     uint8_t buf[1024];
1909     int len, size;
1910
1911     if (!s->connected || s->max_size <= 0)
1912         return;
1913     len = sizeof(buf);
1914     if (len > s->max_size)
1915         len = s->max_size;
1916     size = recv(s->fd, (void *)buf, len, 0);
1917     if (size == 0) {
1918         /* connection closed */
1919         s->connected = 0;
1920         if (s->listen_fd >= 0) {
1921             qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
1922         }
1923         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1924         closesocket(s->fd);
1925         s->fd = -1;
1926     } else if (size > 0) {
1927         if (s->do_telnetopt)
1928             tcp_chr_process_IAC_bytes(chr, s, buf, &size);
1929         if (size > 0)
1930             qemu_chr_read(chr, buf, size);
1931     }
1932 }
1933
1934 static void tcp_chr_connect(void *opaque)
1935 {
1936     CharDriverState *chr = opaque;
1937     TCPCharDriver *s = chr->opaque;
1938
1939     s->connected = 1;
1940     qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
1941                          tcp_chr_read, NULL, chr);
1942     qemu_chr_reset(chr);
1943 }
1944
1945 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
1946 static void tcp_chr_telnet_init(int fd)
1947 {
1948     char buf[3];
1949     /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
1950     IACSET(buf, 0xff, 0xfb, 0x01);  /* IAC WILL ECHO */
1951     send(fd, (char *)buf, 3, 0);
1952     IACSET(buf, 0xff, 0xfb, 0x03);  /* IAC WILL Suppress go ahead */
1953     send(fd, (char *)buf, 3, 0);
1954     IACSET(buf, 0xff, 0xfb, 0x00);  /* IAC WILL Binary */
1955     send(fd, (char *)buf, 3, 0);
1956     IACSET(buf, 0xff, 0xfd, 0x00);  /* IAC DO Binary */
1957     send(fd, (char *)buf, 3, 0);
1958 }
1959
1960 static void socket_set_nodelay(int fd)
1961 {
1962     int val = 1;
1963     setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
1964 }
1965
1966 static void tcp_chr_accept(void *opaque)
1967 {
1968     CharDriverState *chr = opaque;
1969     TCPCharDriver *s = chr->opaque;
1970     struct sockaddr_in saddr;
1971 #ifndef _WIN32
1972     struct sockaddr_un uaddr;
1973 #endif
1974     struct sockaddr *addr;
1975     socklen_t len;
1976     int fd;
1977
1978     for(;;) {
1979 #ifndef _WIN32
1980         if (s->is_unix) {
1981             len = sizeof(uaddr);
1982             addr = (struct sockaddr *)&uaddr;
1983         } else
1984 #endif
1985         {
1986             len = sizeof(saddr);
1987             addr = (struct sockaddr *)&saddr;
1988         }
1989         fd = accept(s->listen_fd, addr, &len);
1990         if (fd < 0 && errno != EINTR) {
1991             return;
1992         } else if (fd >= 0) {
1993             if (s->do_telnetopt)
1994                 tcp_chr_telnet_init(fd);
1995             break;
1996         }
1997     }
1998     socket_set_nonblock(fd);
1999     if (s->do_nodelay)
2000         socket_set_nodelay(fd);
2001     s->fd = fd;
2002     qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2003     tcp_chr_connect(chr);
2004 }
2005
2006 static void tcp_chr_close(CharDriverState *chr)
2007 {
2008     TCPCharDriver *s = chr->opaque;
2009     if (s->fd >= 0) {
2010         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2011         closesocket(s->fd);
2012     }
2013     if (s->listen_fd >= 0) {
2014         qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2015         closesocket(s->listen_fd);
2016     }
2017     qemu_free(s);
2018 }
2019
2020 static CharDriverState *qemu_chr_open_tcp(const char *host_str,
2021                                           int is_telnet,
2022                                           int is_unix)
2023 {
2024     CharDriverState *chr = NULL;
2025     TCPCharDriver *s = NULL;
2026     int fd = -1, offset = 0;
2027     int is_listen = 0;
2028     int is_waitconnect = 1;
2029     int do_nodelay = 0;
2030     const char *ptr;
2031
2032     ptr = host_str;
2033     while((ptr = strchr(ptr,','))) {
2034         ptr++;
2035         if (!strncmp(ptr,"server",6)) {
2036             is_listen = 1;
2037         } else if (!strncmp(ptr,"nowait",6)) {
2038             is_waitconnect = 0;
2039         } else if (!strncmp(ptr,"nodelay",6)) {
2040             do_nodelay = 1;
2041         } else if (!strncmp(ptr,"to=",3)) {
2042             /* nothing, inet_listen() parses this one */;
2043         } else if (!strncmp(ptr,"ipv4",4)) {
2044             /* nothing, inet_connect() and inet_listen() parse this one */;
2045         } else if (!strncmp(ptr,"ipv6",4)) {
2046             /* nothing, inet_connect() and inet_listen() parse this one */;
2047         } else {
2048             printf("Unknown option: %s\n", ptr);
2049             goto fail;
2050         }
2051     }
2052     if (!is_listen)
2053         is_waitconnect = 0;
2054
2055     chr = qemu_mallocz(sizeof(CharDriverState));
2056     s = qemu_mallocz(sizeof(TCPCharDriver));
2057
2058     if (is_listen) {
2059         chr->filename = qemu_malloc(256);
2060         if (is_unix) {
2061             pstrcpy(chr->filename, 256, "unix:");
2062         } else if (is_telnet) {
2063             pstrcpy(chr->filename, 256, "telnet:");
2064         } else {
2065             pstrcpy(chr->filename, 256, "tcp:");
2066         }
2067         offset = strlen(chr->filename);
2068     }
2069     if (is_unix) {
2070         if (is_listen) {
2071             fd = unix_listen(host_str, chr->filename + offset, 256 - offset);
2072         } else {
2073             fd = unix_connect(host_str);
2074         }
2075     } else {
2076         if (is_listen) {
2077             fd = inet_listen(host_str, chr->filename + offset, 256 - offset,
2078                              SOCK_STREAM, 0);
2079         } else {
2080             fd = inet_connect(host_str, SOCK_STREAM);
2081         }
2082     }
2083     if (fd < 0)
2084         goto fail;
2085
2086     if (!is_waitconnect)
2087         socket_set_nonblock(fd);
2088
2089     s->connected = 0;
2090     s->fd = -1;
2091     s->listen_fd = -1;
2092     s->is_unix = is_unix;
2093     s->do_nodelay = do_nodelay && !is_unix;
2094
2095     chr->opaque = s;
2096     chr->chr_write = tcp_chr_write;
2097     chr->chr_close = tcp_chr_close;
2098
2099     if (is_listen) {
2100         s->listen_fd = fd;
2101         qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2102         if (is_telnet)
2103             s->do_telnetopt = 1;
2104     } else {
2105         s->connected = 1;
2106         s->fd = fd;
2107         socket_set_nodelay(fd);
2108         tcp_chr_connect(chr);
2109     }
2110
2111     if (is_listen && is_waitconnect) {
2112         printf("QEMU waiting for connection on: %s\n",
2113                chr->filename ? chr->filename : host_str);
2114         tcp_chr_accept(chr);
2115         socket_set_nonblock(s->listen_fd);
2116     }
2117
2118     return chr;
2119  fail:
2120     if (fd >= 0)
2121         closesocket(fd);
2122     qemu_free(s);
2123     qemu_free(chr);
2124     return NULL;
2125 }
2126
2127 CharDriverState *qemu_chr_open(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2128 {
2129     const char *p;
2130     CharDriverState *chr;
2131
2132     if (!strcmp(filename, "vc")) {
2133         chr = text_console_init(0);
2134     } else
2135     if (strstart(filename, "vc:", &p)) {
2136         chr = text_console_init(p);
2137     } else
2138     if (!strcmp(filename, "null")) {
2139         chr = qemu_chr_open_null();
2140     } else
2141     if (strstart(filename, "tcp:", &p)) {
2142         chr = qemu_chr_open_tcp(p, 0, 0);
2143     } else
2144     if (strstart(filename, "telnet:", &p)) {
2145         chr = qemu_chr_open_tcp(p, 1, 0);
2146     } else
2147     if (strstart(filename, "udp:", &p)) {
2148         chr = qemu_chr_open_udp(p);
2149     } else
2150     if (strstart(filename, "mon:", &p)) {
2151         chr = qemu_chr_open(label, p, NULL);
2152         if (chr) {
2153             chr = qemu_chr_open_mux(chr);
2154             monitor_init(chr, MONITOR_USE_READLINE);
2155         } else {
2156             printf("Unable to open driver: %s\n", p);
2157         }
2158     } else if (!strcmp(filename, "msmouse")) {
2159         chr = qemu_chr_open_msmouse();
2160     } else
2161 #ifndef _WIN32
2162     if (strstart(filename, "unix:", &p)) {
2163         chr = qemu_chr_open_tcp(p, 0, 1);
2164     } else if (strstart(filename, "file:", &p)) {
2165         chr = qemu_chr_open_file_out(p);
2166     } else if (strstart(filename, "pipe:", &p)) {
2167         chr = qemu_chr_open_pipe(p);
2168     } else if (!strcmp(filename, "pty")) {
2169         chr = qemu_chr_open_pty();
2170     } else if (!strcmp(filename, "stdio")) {
2171         chr = qemu_chr_open_stdio();
2172     } else
2173 #if defined(__linux__)
2174     if (strstart(filename, "/dev/parport", NULL)) {
2175         chr = qemu_chr_open_pp(filename);
2176     } else
2177 #elif defined(__FreeBSD__) || defined(__DragonFly__)
2178     if (strstart(filename, "/dev/ppi", NULL)) {
2179         chr = qemu_chr_open_pp(filename);
2180     } else
2181 #endif
2182 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2183     || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
2184     if (strstart(filename, "/dev/", NULL)) {
2185         chr = qemu_chr_open_tty(filename);
2186     } else
2187 #endif
2188 #else /* !_WIN32 */
2189     if (strstart(filename, "COM", NULL)) {
2190         chr = qemu_chr_open_win(filename);
2191     } else
2192     if (strstart(filename, "pipe:", &p)) {
2193         chr = qemu_chr_open_win_pipe(p);
2194     } else
2195     if (strstart(filename, "con:", NULL)) {
2196         chr = qemu_chr_open_win_con(filename);
2197     } else
2198     if (strstart(filename, "file:", &p)) {
2199         chr = qemu_chr_open_win_file_out(p);
2200     } else
2201 #endif
2202 #ifdef CONFIG_BRLAPI
2203     if (!strcmp(filename, "braille")) {
2204         chr = chr_baum_init();
2205     } else
2206 #endif
2207     {
2208         chr = NULL;
2209     }
2210
2211     if (chr) {
2212         if (!chr->filename)
2213             chr->filename = qemu_strdup(filename);
2214         chr->init = init;
2215         chr->label = qemu_strdup(label);
2216         TAILQ_INSERT_TAIL(&chardevs, chr, next);
2217     }
2218     return chr;
2219 }
2220
2221 void qemu_chr_close(CharDriverState *chr)
2222 {
2223     TAILQ_REMOVE(&chardevs, chr, next);
2224     if (chr->chr_close)
2225         chr->chr_close(chr);
2226     qemu_free(chr->filename);
2227     qemu_free(chr->label);
2228     qemu_free(chr);
2229 }
2230
2231 void qemu_chr_info(Monitor *mon)
2232 {
2233     CharDriverState *chr;
2234
2235     TAILQ_FOREACH(chr, &chardevs, next) {
2236         monitor_printf(mon, "%s: filename=%s\n", chr->label, chr->filename);
2237     }
2238 }