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 "qmp-commands.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 /***********************************************************/
 104 /* character device */
 105
 106 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
 107     QTAILQ_HEAD_INITIALIZER(chardevs);
 108
 109 static void qemu_chr_event(CharDriverState *s, int event)
 110 {
 111     /* Keep track if the char device is open */
 112     switch (event) {
 113         case CHR_EVENT_OPENED:
 114             s->opened = 1;
 115             break;
 116         case CHR_EVENT_CLOSED:
 117             s->opened = 0;
 118             break;
 119     }
 120
 121     if (!s->chr_event)
 122         return;
 123     s->chr_event(s->handler_opaque, event);
 124 }
 125
 126 static void qemu_chr_generic_open_bh(void *opaque)
 127 {
 128     CharDriverState *s = opaque;
 129     qemu_chr_event(s, CHR_EVENT_OPENED);
 130     qemu_bh_delete(s->bh);
 131     s->bh = NULL;
 132 }
 133
 134 void qemu_chr_generic_open(CharDriverState *s)
 135 {
 136     if (s->bh == NULL) {
 137         s->bh = qemu_bh_new(qemu_chr_generic_open_bh, s);
 138         qemu_bh_schedule(s->bh);
 139     }
 140 }
 141
 142 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
 143 {
 144     return s->chr_write(s, buf, len);
 145 }
 146
 147 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
 148 {
 149     if (!s->chr_ioctl)
 150         return -ENOTSUP;
 151     return s->chr_ioctl(s, cmd, arg);
 152 }
 153
 154 int qemu_chr_be_can_write(CharDriverState *s)
 155 {
 156     if (!s->chr_can_read)
 157         return 0;
 158     return s->chr_can_read(s->handler_opaque);
 159 }
 160
 161 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
 162 {
 163     s->chr_read(s->handler_opaque, buf, len);
 164 }
 165
 166 int qemu_chr_fe_get_msgfd(CharDriverState *s)
 167 {
 168     return s->get_msgfd ? s->get_msgfd(s) : -1;
 169 }
 170
 171 int qemu_chr_add_client(CharDriverState *s, int fd)
 172 {
 173     return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
 174 }
 175
 176 void qemu_chr_accept_input(CharDriverState *s)
 177 {
 178     if (s->chr_accept_input)
 179         s->chr_accept_input(s);
 180 }
 181
 182 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
 183 {
 184     char buf[READ_BUF_LEN];
 185     va_list ap;
 186     va_start(ap, fmt);
 187     vsnprintf(buf, sizeof(buf), fmt, ap);
 188     qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
 189     va_end(ap);
 190 }
 191
 192 void qemu_chr_add_handlers(CharDriverState *s,
 193                            IOCanReadHandler *fd_can_read,
 194                            IOReadHandler *fd_read,
 195                            IOEventHandler *fd_event,
 196                            void *opaque)
 197 {
 198     if (!opaque && !fd_can_read && !fd_read && !fd_event) {
 199         /* chr driver being released. */
 200         ++s->avail_connections;
 201     }
 202     s->chr_can_read = fd_can_read;
 203     s->chr_read = fd_read;
 204     s->chr_event = fd_event;
 205     s->handler_opaque = opaque;
 206     if (s->chr_update_read_handler)
 207         s->chr_update_read_handler(s);
 208
 209     /* We're connecting to an already opened device, so let's make sure we
 210        also get the open event */
 211     if (s->opened) {
 212         qemu_chr_generic_open(s);
 213     }
 214 }
 215
 216 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 217 {
 218     return len;
 219 }
 220
 221 static int qemu_chr_open_null(QemuOpts *opts, CharDriverState **_chr)
 222 {
 223     CharDriverState *chr;
 224
 225     chr = g_malloc0(sizeof(CharDriverState));
 226     chr->chr_write = null_chr_write;
 227
 228     *_chr= chr;
 229     return 0;
 230 }
 231
 232 /* MUX driver for serial I/O splitting */
 233 #define MAX_MUX 4
 234 #define MUX_BUFFER_SIZE 32      /* Must be a power of 2.  */
 235 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
 236 typedef struct {
 237     IOCanReadHandler *chr_can_read[MAX_MUX];
 238     IOReadHandler *chr_read[MAX_MUX];
 239     IOEventHandler *chr_event[MAX_MUX];
 240     void *ext_opaque[MAX_MUX];
 241     CharDriverState *drv;
 242     int focus;
 243     int mux_cnt;
 244     int term_got_escape;
 245     int max_size;
 246     /* Intermediate input buffer allows to catch escape sequences even if the
 247        currently active device is not accepting any input - but only until it
 248        is full as well. */
 249     unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
 250     int prod[MAX_MUX];
 251     int cons[MAX_MUX];
 252     int timestamps;
 253     int linestart;
 254     int64_t timestamps_start;
 255 } MuxDriver;
 256
 257
 258 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 259 {
 260     MuxDriver *d = chr->opaque;
 261     int ret;
 262     if (!d->timestamps) {
 263         ret = d->drv->chr_write(d->drv, buf, len);
 264     } else {
 265         int i;
 266
 267         ret = 0;
 268         for (i = 0; i < len; i++) {
 269             if (d->linestart) {
 270                 char buf1[64];
 271                 int64_t ti;
 272                 int secs;
 273
 274                 ti = qemu_get_clock_ms(rt_clock);
 275                 if (d->timestamps_start == -1)
 276                     d->timestamps_start = ti;
 277                 ti -= d->timestamps_start;
 278                 secs = ti / 1000;
 279                 snprintf(buf1, sizeof(buf1),
 280                          "[%02d:%02d:%02d.%03d] ",
 281                          secs / 3600,
 282                          (secs / 60) % 60,
 283                          secs % 60,
 284                          (int)(ti % 1000));
 285                 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
 286                 d->linestart = 0;
 287             }
 288             ret += d->drv->chr_write(d->drv, buf+i, 1);
 289             if (buf[i] == '\n') {
 290                 d->linestart = 1;
 291             }
 292         }
 293     }
 294     return ret;
 295 }
 296
 297 static const char * const mux_help[] = {
 298     "% h    print this help\n\r",
 299     "% x    exit emulator\n\r",
 300     "% s    save disk data back to file (if -snapshot)\n\r",
 301     "% t    toggle console timestamps\n\r"
 302     "% b    send break (magic sysrq)\n\r",
 303     "% c    switch between console and monitor\n\r",
 304     "% %  sends %\n\r",
 305     NULL
 306 };
 307
 308 int term_escape_char = 0x01; /* ctrl-a is used for escape */
 309 static void mux_print_help(CharDriverState *chr)
 310 {
 311     int i, j;
 312     char ebuf[15] = "Escape-Char";
 313     char cbuf[50] = "\n\r";
 314
 315     if (term_escape_char > 0 && term_escape_char < 26) {
 316         snprintf(cbuf, sizeof(cbuf), "\n\r");
 317         snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
 318     } else {
 319         snprintf(cbuf, sizeof(cbuf),
 320                  "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
 321                  term_escape_char);
 322     }
 323     chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
 324     for (i = 0; mux_help[i] != NULL; i++) {
 325         for (j=0; mux_help[i][j] != '\0'; j++) {
 326             if (mux_help[i][j] == '%')
 327                 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
 328             else
 329                 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
 330         }
 331     }
 332 }
 333
 334 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
 335 {
 336     if (d->chr_event[mux_nr])
 337         d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
 338 }
 339
 340 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
 341 {
 342     if (d->term_got_escape) {
 343         d->term_got_escape = 0;
 344         if (ch == term_escape_char)
 345             goto send_char;
 346         switch(ch) {
 347         case '?':
 348         case 'h':
 349             mux_print_help(chr);
 350             break;
 351         case 'x':
 352             {
 353                  const char *term =  "QEMU: Terminated\n\r";
 354                  chr->chr_write(chr,(uint8_t *)term,strlen(term));
 355                  exit(0);
 356                  break;
 357             }
 358         case 's':
 359             bdrv_commit_all();
 360             break;
 361         case 'b':
 362             qemu_chr_event(chr, CHR_EVENT_BREAK);
 363             break;
 364         case 'c':
 365             /* Switch to the next registered device */
 366             mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
 367             d->focus++;
 368             if (d->focus >= d->mux_cnt)
 369                 d->focus = 0;
 370             mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
 371             break;
 372         case 't':
 373             d->timestamps = !d->timestamps;
 374             d->timestamps_start = -1;
 375             d->linestart = 0;
 376             break;
 377         }
 378     } else if (ch == term_escape_char) {
 379         d->term_got_escape = 1;
 380     } else {
 381     send_char:
 382         return 1;
 383     }
 384     return 0;
 385 }
 386
 387 static void mux_chr_accept_input(CharDriverState *chr)
 388 {
 389     MuxDriver *d = chr->opaque;
 390     int m = d->focus;
 391
 392     while (d->prod[m] != d->cons[m] &&
 393            d->chr_can_read[m] &&
 394            d->chr_can_read[m](d->ext_opaque[m])) {
 395         d->chr_read[m](d->ext_opaque[m],
 396                        &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
 397     }
 398 }
 399
 400 static int mux_chr_can_read(void *opaque)
 401 {
 402     CharDriverState *chr = opaque;
 403     MuxDriver *d = chr->opaque;
 404     int m = d->focus;
 405
 406     if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
 407         return 1;
 408     if (d->chr_can_read[m])
 409         return d->chr_can_read[m](d->ext_opaque[m]);
 410     return 0;
 411 }
 412
 413 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
 414 {
 415     CharDriverState *chr = opaque;
 416     MuxDriver *d = chr->opaque;
 417     int m = d->focus;
 418     int i;
 419
 420     mux_chr_accept_input (opaque);
 421
 422     for(i = 0; i < size; i++)
 423         if (mux_proc_byte(chr, d, buf[i])) {
 424             if (d->prod[m] == d->cons[m] &&
 425                 d->chr_can_read[m] &&
 426                 d->chr_can_read[m](d->ext_opaque[m]))
 427                 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
 428             else
 429                 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
 430         }
 431 }
 432
 433 static void mux_chr_event(void *opaque, int event)
 434 {
 435     CharDriverState *chr = opaque;
 436     MuxDriver *d = chr->opaque;
 437     int i;
 438
 439     /* Send the event to all registered listeners */
 440     for (i = 0; i < d->mux_cnt; i++)
 441         mux_chr_send_event(d, i, event);
 442 }
 443
 444 static void mux_chr_update_read_handler(CharDriverState *chr)
 445 {
 446     MuxDriver *d = chr->opaque;
 447
 448     if (d->mux_cnt >= MAX_MUX) {
 449         fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
 450         return;
 451     }
 452     d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
 453     d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
 454     d->chr_read[d->mux_cnt] = chr->chr_read;
 455     d->chr_event[d->mux_cnt] = chr->chr_event;
 456     /* Fix up the real driver with mux routines */
 457     if (d->mux_cnt == 0) {
 458         qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
 459                               mux_chr_event, chr);
 460     }
 461     if (d->focus != -1) {
 462         mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
 463     }
 464     d->focus = d->mux_cnt;
 465     d->mux_cnt++;
 466     mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
 467 }
 468
 469 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
 470 {
 471     CharDriverState *chr;
 472     MuxDriver *d;
 473
 474     chr = g_malloc0(sizeof(CharDriverState));
 475     d = g_malloc0(sizeof(MuxDriver));
 476
 477     chr->opaque = d;
 478     d->drv = drv;
 479     d->focus = -1;
 480     chr->chr_write = mux_chr_write;
 481     chr->chr_update_read_handler = mux_chr_update_read_handler;
 482     chr->chr_accept_input = mux_chr_accept_input;
 483     /* Frontend guest-open / -close notification is not support with muxes */
 484     chr->chr_guest_open = NULL;
 485     chr->chr_guest_close = NULL;
 486
 487     /* Muxes are always open on creation */
 488     qemu_chr_generic_open(chr);
 489
 490     return chr;
 491 }
 492
 493
 494 #ifdef _WIN32
 495 int send_all(int fd, const void *buf, int len1)
 496 {
 497     int ret, len;
 498
 499     len = len1;
 500     while (len > 0) {
 501         ret = send(fd, buf, len, 0);
 502         if (ret < 0) {
 503             errno = WSAGetLastError();
 504             if (errno != WSAEWOULDBLOCK) {
 505                 return -1;
 506             }
 507         } else if (ret == 0) {
 508             break;
 509         } else {
 510             buf += ret;
 511             len -= ret;
 512         }
 513     }
 514     return len1 - len;
 515 }
 516
 517 #else
 518
 519 int send_all(int fd, const void *_buf, int len1)
 520 {
 521     int ret, len;
 522     const uint8_t *buf = _buf;
 523
 524     len = len1;
 525     while (len > 0) {
 526         ret = write(fd, buf, len);
 527         if (ret < 0) {
 528             if (errno != EINTR && errno != EAGAIN)
 529                 return -1;
 530         } else if (ret == 0) {
 531             break;
 532         } else {
 533             buf += ret;
 534             len -= ret;
 535         }
 536     }
 537     return len1 - len;
 538 }
 539 #endif /* !_WIN32 */
 540
 541 #ifndef _WIN32
 542
 543 typedef struct {
 544     int fd_in, fd_out;
 545     int max_size;
 546 } FDCharDriver;
 547
 548 #define STDIO_MAX_CLIENTS 1
 549 static int stdio_nb_clients = 0;
 550
 551 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 552 {
 553     FDCharDriver *s = chr->opaque;
 554     return send_all(s->fd_out, buf, len);
 555 }
 556
 557 static int fd_chr_read_poll(void *opaque)
 558 {
 559     CharDriverState *chr = opaque;
 560     FDCharDriver *s = chr->opaque;
 561
 562     s->max_size = qemu_chr_be_can_write(chr);
 563     return s->max_size;
 564 }
 565
 566 static void fd_chr_read(void *opaque)
 567 {
 568     CharDriverState *chr = opaque;
 569     FDCharDriver *s = chr->opaque;
 570     int size, len;
 571     uint8_t buf[READ_BUF_LEN];
 572
 573     len = sizeof(buf);
 574     if (len > s->max_size)
 575         len = s->max_size;
 576     if (len == 0)
 577         return;
 578     size = read(s->fd_in, buf, len);
 579     if (size == 0) {
 580         /* FD has been closed. Remove it from the active list.  */
 581         qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
 582         qemu_chr_event(chr, CHR_EVENT_CLOSED);
 583         return;
 584     }
 585     if (size > 0) {
 586         qemu_chr_be_write(chr, buf, size);
 587     }
 588 }
 589
 590 static void fd_chr_update_read_handler(CharDriverState *chr)
 591 {
 592     FDCharDriver *s = chr->opaque;
 593
 594     if (s->fd_in >= 0) {
 595         if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
 596         } else {
 597             qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
 598                                  fd_chr_read, NULL, chr);
 599         }
 600     }
 601 }
 602
 603 static void fd_chr_close(struct CharDriverState *chr)
 604 {
 605     FDCharDriver *s = chr->opaque;
 606
 607     if (s->fd_in >= 0) {
 608         if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
 609         } else {
 610             qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
 611         }
 612     }
 613
 614     g_free(s);
 615     qemu_chr_event(chr, CHR_EVENT_CLOSED);
 616 }
 617
 618 /* open a character device to a unix fd */
 619 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
 620 {
 621     CharDriverState *chr;
 622     FDCharDriver *s;
 623
 624     chr = g_malloc0(sizeof(CharDriverState));
 625     s = g_malloc0(sizeof(FDCharDriver));
 626     s->fd_in = fd_in;
 627     s->fd_out = fd_out;
 628     chr->opaque = s;
 629     chr->chr_write = fd_chr_write;
 630     chr->chr_update_read_handler = fd_chr_update_read_handler;
 631     chr->chr_close = fd_chr_close;
 632
 633     qemu_chr_generic_open(chr);
 634
 635     return chr;
 636 }
 637
 638 static int qemu_chr_open_file_out(QemuOpts *opts, CharDriverState **_chr)
 639 {
 640     int fd_out;
 641
 642     TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
 643                       O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
 644     if (fd_out < 0) {
 645         return -errno;
 646     }
 647
 648     *_chr = qemu_chr_open_fd(-1, fd_out);
 649     return 0;
 650 }
 651
 652 static int qemu_chr_open_pipe(QemuOpts *opts, CharDriverState **_chr)
 653 {
 654     int fd_in, fd_out;
 655     char filename_in[256], filename_out[256];
 656     const char *filename = qemu_opt_get(opts, "path");
 657
 658     if (filename == NULL) {
 659         fprintf(stderr, "chardev: pipe: no filename given\n");
 660         return -EINVAL;
 661     }
 662
 663     snprintf(filename_in, 256, "%s.in", filename);
 664     snprintf(filename_out, 256, "%s.out", filename);
 665     TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
 666     TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
 667     if (fd_in < 0 || fd_out < 0) {
 668         if (fd_in >= 0)
 669             close(fd_in);
 670         if (fd_out >= 0)
 671             close(fd_out);
 672         TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
 673         if (fd_in < 0) {
 674             return -errno;
 675         }
 676     }
 677
 678     *_chr = qemu_chr_open_fd(fd_in, fd_out);
 679     return 0;
 680 }
 681
 682
 683 /* for STDIO, we handle the case where several clients use it
 684    (nographic mode) */
 685
 686 #define TERM_FIFO_MAX_SIZE 1
 687
 688 static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
 689 static int term_fifo_size;
 690
 691 static int stdio_read_poll(void *opaque)
 692 {
 693     CharDriverState *chr = opaque;
 694
 695     /* try to flush the queue if needed */
 696     if (term_fifo_size != 0 && qemu_chr_be_can_write(chr) > 0) {
 697         qemu_chr_be_write(chr, term_fifo, 1);
 698         term_fifo_size = 0;
 699     }
 700     /* see if we can absorb more chars */
 701     if (term_fifo_size == 0)
 702         return 1;
 703     else
 704         return 0;
 705 }
 706
 707 static void stdio_read(void *opaque)
 708 {
 709     int size;
 710     uint8_t buf[1];
 711     CharDriverState *chr = opaque;
 712
 713     size = read(0, buf, 1);
 714     if (size == 0) {
 715         /* stdin has been closed. Remove it from the active list.  */
 716         qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
 717         qemu_chr_event(chr, CHR_EVENT_CLOSED);
 718         return;
 719     }
 720     if (size > 0) {
 721         if (qemu_chr_be_can_write(chr) > 0) {
 722             qemu_chr_be_write(chr, buf, 1);
 723         } else if (term_fifo_size == 0) {
 724             term_fifo[term_fifo_size++] = buf[0];
 725         }
 726     }
 727 }
 728
 729 /* init terminal so that we can grab keys */
 730 static struct termios oldtty;
 731 static int old_fd0_flags;
 732 static bool stdio_allow_signal;
 733
 734 static void term_exit(void)
 735 {
 736     tcsetattr (0, TCSANOW, &oldtty);
 737     fcntl(0, F_SETFL, old_fd0_flags);
 738 }
 739
 740 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
 741 {
 742     struct termios tty;
 743
 744     tty = oldtty;
 745     if (!echo) {
 746         tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
 747                           |INLCR|IGNCR|ICRNL|IXON);
 748         tty.c_oflag |= OPOST;
 749         tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
 750         tty.c_cflag &= ~(CSIZE|PARENB);
 751         tty.c_cflag |= CS8;
 752         tty.c_cc[VMIN] = 1;
 753         tty.c_cc[VTIME] = 0;
 754     }
 755     /* if graphical mode, we allow Ctrl-C handling */
 756     if (!stdio_allow_signal)
 757         tty.c_lflag &= ~ISIG;
 758
 759     tcsetattr (0, TCSANOW, &tty);
 760 }
 761
 762 static void qemu_chr_close_stdio(struct CharDriverState *chr)
 763 {
 764     term_exit();
 765     stdio_nb_clients--;
 766     qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
 767     fd_chr_close(chr);
 768 }
 769
 770 static int qemu_chr_open_stdio(QemuOpts *opts, CharDriverState **_chr)
 771 {
 772     CharDriverState *chr;
 773
 774     if (stdio_nb_clients >= STDIO_MAX_CLIENTS) {
 775         return -EBUSY;
 776     }
 777
 778     if (stdio_nb_clients == 0) {
 779         old_fd0_flags = fcntl(0, F_GETFL);
 780         tcgetattr (0, &oldtty);
 781         fcntl(0, F_SETFL, O_NONBLOCK);
 782         atexit(term_exit);
 783     }
 784
 785     chr = qemu_chr_open_fd(0, 1);
 786     chr->chr_close = qemu_chr_close_stdio;
 787     chr->chr_set_echo = qemu_chr_set_echo_stdio;
 788     qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
 789     stdio_nb_clients++;
 790     stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
 791                                            display_type != DT_NOGRAPHIC);
 792     qemu_chr_fe_set_echo(chr, false);
 793
 794     *_chr = chr;
 795     return 0;
 796 }
 797
 798 #ifdef __sun__
 799 /* Once Solaris has openpty(), this is going to be removed. */
 800 static int openpty(int *amaster, int *aslave, char *name,
 801                    struct termios *termp, struct winsize *winp)
 802 {
 803         const char *slave;
 804         int mfd = -1, sfd = -1;
 805
 806         *amaster = *aslave = -1;
 807
 808         mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
 809         if (mfd < 0)
 810                 goto err;
 811
 812         if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
 813                 goto err;
 814
 815         if ((slave = ptsname(mfd)) == NULL)
 816                 goto err;
 817
 818         if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
 819                 goto err;
 820
 821         if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
 822             (termp != NULL && tcgetattr(sfd, termp) < 0))
 823                 goto err;
 824
 825         if (amaster)
 826                 *amaster = mfd;
 827         if (aslave)
 828                 *aslave = sfd;
 829         if (winp)
 830                 ioctl(sfd, TIOCSWINSZ, winp);
 831
 832         return 0;
 833
 834 err:
 835         if (sfd != -1)
 836                 close(sfd);
 837         close(mfd);
 838         return -1;
 839 }
 840
 841 static void cfmakeraw (struct termios *termios_p)
 842 {
 843         termios_p->c_iflag &=
 844                 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
 845         termios_p->c_oflag &= ~OPOST;
 846         termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
 847         termios_p->c_cflag &= ~(CSIZE|PARENB);
 848         termios_p->c_cflag |= CS8;
 849
 850         termios_p->c_cc[VMIN] = 0;
 851         termios_p->c_cc[VTIME] = 0;
 852 }
 853 #endif
 854
 855 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
 856     || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
 857     || defined(__GLIBC__)
 858
 859 typedef struct {
 860     int fd;
 861     int connected;
 862     int polling;
 863     int read_bytes;
 864     QEMUTimer *timer;
 865 } PtyCharDriver;
 866
 867 static void pty_chr_update_read_handler(CharDriverState *chr);
 868 static void pty_chr_state(CharDriverState *chr, int connected);
 869
 870 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 871 {
 872     PtyCharDriver *s = chr->opaque;
 873
 874     if (!s->connected) {
 875         /* guest sends data, check for (re-)connect */
 876         pty_chr_update_read_handler(chr);
 877         return 0;
 878     }
 879     return send_all(s->fd, buf, len);
 880 }
 881
 882 static int pty_chr_read_poll(void *opaque)
 883 {
 884     CharDriverState *chr = opaque;
 885     PtyCharDriver *s = chr->opaque;
 886
 887     s->read_bytes = qemu_chr_be_can_write(chr);
 888     return s->read_bytes;
 889 }
 890
 891 static void pty_chr_read(void *opaque)
 892 {
 893     CharDriverState *chr = opaque;
 894     PtyCharDriver *s = chr->opaque;
 895     int size, len;
 896     uint8_t buf[READ_BUF_LEN];
 897
 898     len = sizeof(buf);
 899     if (len > s->read_bytes)
 900         len = s->read_bytes;
 901     if (len == 0)
 902         return;
 903     size = read(s->fd, buf, len);
 904     if ((size == -1 && errno == EIO) ||
 905         (size == 0)) {
 906         pty_chr_state(chr, 0);
 907         return;
 908     }
 909     if (size > 0) {
 910         pty_chr_state(chr, 1);
 911         qemu_chr_be_write(chr, buf, size);
 912     }
 913 }
 914
 915 static void pty_chr_update_read_handler(CharDriverState *chr)
 916 {
 917     PtyCharDriver *s = chr->opaque;
 918
 919     qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
 920                          pty_chr_read, NULL, chr);
 921     s->polling = 1;
 922     /*
 923      * Short timeout here: just need wait long enougth that qemu makes
 924      * it through the poll loop once.  When reconnected we want a
 925      * short timeout so we notice it almost instantly.  Otherwise
 926      * read() gives us -EIO instantly, making pty_chr_state() reset the
 927      * timeout to the normal (much longer) poll interval before the
 928      * timer triggers.
 929      */
 930     qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 10);
 931 }
 932
 933 static void pty_chr_state(CharDriverState *chr, int connected)
 934 {
 935     PtyCharDriver *s = chr->opaque;
 936
 937     if (!connected) {
 938         qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
 939         s->connected = 0;
 940         s->polling = 0;
 941         /* (re-)connect poll interval for idle guests: once per second.
 942          * We check more frequently in case the guests sends data to
 943          * the virtual device linked to our pty. */
 944         qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 1000);
 945     } else {
 946         if (!s->connected)
 947             qemu_chr_generic_open(chr);
 948         s->connected = 1;
 949     }
 950 }
 951
 952 static void pty_chr_timer(void *opaque)
 953 {
 954     struct CharDriverState *chr = opaque;
 955     PtyCharDriver *s = chr->opaque;
 956
 957     if (s->connected)
 958         return;
 959     if (s->polling) {
 960         /* If we arrive here without polling being cleared due
 961          * read returning -EIO, then we are (re-)connected */
 962         pty_chr_state(chr, 1);
 963         return;
 964     }
 965
 966     /* Next poll ... */
 967     pty_chr_update_read_handler(chr);
 968 }
 969
 970 static void pty_chr_close(struct CharDriverState *chr)
 971 {
 972     PtyCharDriver *s = chr->opaque;
 973
 974     qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
 975     close(s->fd);
 976     qemu_del_timer(s->timer);
 977     qemu_free_timer(s->timer);
 978     g_free(s);
 979     qemu_chr_event(chr, CHR_EVENT_CLOSED);
 980 }
 981
 982 static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr)
 983 {
 984     CharDriverState *chr;
 985     PtyCharDriver *s;
 986     struct termios tty;
 987     int slave_fd, len;
 988 #if defined(__OpenBSD__) || defined(__DragonFly__)
 989     char pty_name[PATH_MAX];
 990 #define q_ptsname(x) pty_name
 991 #else
 992     char *pty_name = NULL;
 993 #define q_ptsname(x) ptsname(x)
 994 #endif
 995
 996     chr = g_malloc0(sizeof(CharDriverState));
 997     s = g_malloc0(sizeof(PtyCharDriver));
 998
 999     if (openpty(&s->fd, &slave_fd, pty_name, NULL, NULL) < 0) {
1000         return -errno;
1001     }
1002
1003     /* Set raw attributes on the pty. */
1004     tcgetattr(slave_fd, &tty);
1005     cfmakeraw(&tty);
1006     tcsetattr(slave_fd, TCSAFLUSH, &tty);
1007     close(slave_fd);
1008
1009     len = strlen(q_ptsname(s->fd)) + 5;
1010     chr->filename = g_malloc(len);
1011     snprintf(chr->filename, len, "pty:%s", q_ptsname(s->fd));
1012     qemu_opt_set(opts, "path", q_ptsname(s->fd));
1013     fprintf(stderr, "char device redirected to %s\n", q_ptsname(s->fd));
1014
1015     chr->opaque = s;
1016     chr->chr_write = pty_chr_write;
1017     chr->chr_update_read_handler = pty_chr_update_read_handler;
1018     chr->chr_close = pty_chr_close;
1019
1020     s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr);
1021
1022     *_chr = chr;
1023     return 0;
1024 }
1025
1026 static void tty_serial_init(int fd, int speed,
1027                             int parity, int data_bits, int stop_bits)
1028 {
1029     struct termios tty;
1030     speed_t spd;
1031
1032 #if 0
1033     printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1034            speed, parity, data_bits, stop_bits);
1035 #endif
1036     tcgetattr (fd, &tty);
1037
1038 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1039     speed = speed * 10 / 11;
1040     do {
1041         check_speed(50);
1042         check_speed(75);
1043         check_speed(110);
1044         check_speed(134);
1045         check_speed(150);
1046         check_speed(200);
1047         check_speed(300);
1048         check_speed(600);
1049         check_speed(1200);
1050         check_speed(1800);
1051         check_speed(2400);
1052         check_speed(4800);
1053         check_speed(9600);
1054         check_speed(19200);
1055         check_speed(38400);
1056         /* Non-Posix values follow. They may be unsupported on some systems. */
1057         check_speed(57600);
1058         check_speed(115200);
1059 #ifdef B230400
1060         check_speed(230400);
1061 #endif
1062 #ifdef B460800
1063         check_speed(460800);
1064 #endif
1065 #ifdef B500000
1066         check_speed(500000);
1067 #endif
1068 #ifdef B576000
1069         check_speed(576000);
1070 #endif
1071 #ifdef B921600
1072         check_speed(921600);
1073 #endif
1074 #ifdef B1000000
1075         check_speed(1000000);
1076 #endif
1077 #ifdef B1152000
1078         check_speed(1152000);
1079 #endif
1080 #ifdef B1500000
1081         check_speed(1500000);
1082 #endif
1083 #ifdef B2000000
1084         check_speed(2000000);
1085 #endif
1086 #ifdef B2500000
1087         check_speed(2500000);
1088 #endif
1089 #ifdef B3000000
1090         check_speed(3000000);
1091 #endif
1092 #ifdef B3500000
1093         check_speed(3500000);
1094 #endif
1095 #ifdef B4000000
1096         check_speed(4000000);
1097 #endif
1098         spd = B115200;
1099     } while (0);
1100
1101     cfsetispeed(&tty, spd);
1102     cfsetospeed(&tty, spd);
1103
1104     tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1105                           |INLCR|IGNCR|ICRNL|IXON);
1106     tty.c_oflag |= OPOST;
1107     tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1108     tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1109     switch(data_bits) {
1110     default:
1111     case 8:
1112         tty.c_cflag |= CS8;
1113         break;
1114     case 7:
1115         tty.c_cflag |= CS7;
1116         break;
1117     case 6:
1118         tty.c_cflag |= CS6;
1119         break;
1120     case 5:
1121         tty.c_cflag |= CS5;
1122         break;
1123     }
1124     switch(parity) {
1125     default:
1126     case 'N':
1127         break;
1128     case 'E':
1129         tty.c_cflag |= PARENB;
1130         break;
1131     case 'O':
1132         tty.c_cflag |= PARENB | PARODD;
1133         break;
1134     }
1135     if (stop_bits == 2)
1136         tty.c_cflag |= CSTOPB;
1137
1138     tcsetattr (fd, TCSANOW, &tty);
1139 }
1140
1141 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1142 {
1143     FDCharDriver *s = chr->opaque;
1144
1145     switch(cmd) {
1146     case CHR_IOCTL_SERIAL_SET_PARAMS:
1147         {
1148             QEMUSerialSetParams *ssp = arg;
1149             tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1150                             ssp->data_bits, ssp->stop_bits);
1151         }
1152         break;
1153     case CHR_IOCTL_SERIAL_SET_BREAK:
1154         {
1155             int enable = *(int *)arg;
1156             if (enable)
1157                 tcsendbreak(s->fd_in, 1);
1158         }
1159         break;
1160     case CHR_IOCTL_SERIAL_GET_TIOCM:
1161         {
1162             int sarg = 0;
1163             int *targ = (int *)arg;
1164             ioctl(s->fd_in, TIOCMGET, &sarg);
1165             *targ = 0;
1166             if (sarg & TIOCM_CTS)
1167                 *targ |= CHR_TIOCM_CTS;
1168             if (sarg & TIOCM_CAR)
1169                 *targ |= CHR_TIOCM_CAR;
1170             if (sarg & TIOCM_DSR)
1171                 *targ |= CHR_TIOCM_DSR;
1172             if (sarg & TIOCM_RI)
1173                 *targ |= CHR_TIOCM_RI;
1174             if (sarg & TIOCM_DTR)
1175                 *targ |= CHR_TIOCM_DTR;
1176             if (sarg & TIOCM_RTS)
1177                 *targ |= CHR_TIOCM_RTS;
1178         }
1179         break;
1180     case CHR_IOCTL_SERIAL_SET_TIOCM:
1181         {
1182             int sarg = *(int *)arg;
1183             int targ = 0;
1184             ioctl(s->fd_in, TIOCMGET, &targ);
1185             targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1186                      | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1187             if (sarg & CHR_TIOCM_CTS)
1188                 targ |= TIOCM_CTS;
1189             if (sarg & CHR_TIOCM_CAR)
1190                 targ |= TIOCM_CAR;
1191             if (sarg & CHR_TIOCM_DSR)
1192                 targ |= TIOCM_DSR;
1193             if (sarg & CHR_TIOCM_RI)
1194                 targ |= TIOCM_RI;
1195             if (sarg & CHR_TIOCM_DTR)
1196                 targ |= TIOCM_DTR;
1197             if (sarg & CHR_TIOCM_RTS)
1198                 targ |= TIOCM_RTS;
1199             ioctl(s->fd_in, TIOCMSET, &targ);
1200         }
1201         break;
1202     default:
1203         return -ENOTSUP;
1204     }
1205     return 0;
1206 }
1207
1208 static void qemu_chr_close_tty(CharDriverState *chr)
1209 {
1210     FDCharDriver *s = chr->opaque;
1211     int fd = -1;
1212
1213     if (s) {
1214         fd = s->fd_in;
1215     }
1216
1217     fd_chr_close(chr);
1218
1219     if (fd >= 0) {
1220         close(fd);
1221     }
1222 }
1223
1224 static int qemu_chr_open_tty(QemuOpts *opts, CharDriverState **_chr)
1225 {
1226     const char *filename = qemu_opt_get(opts, "path");
1227     CharDriverState *chr;
1228     int fd;
1229
1230     TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK));
1231     if (fd < 0) {
1232         return -errno;
1233     }
1234     tty_serial_init(fd, 115200, 'N', 8, 1);
1235     chr = qemu_chr_open_fd(fd, fd);
1236     chr->chr_ioctl = tty_serial_ioctl;
1237     chr->chr_close = qemu_chr_close_tty;
1238
1239     *_chr = chr;
1240     return 0;
1241 }
1242 #else  /* ! __linux__ && ! __sun__ */
1243 static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr)
1244 {
1245     return -ENOTSUP;
1246 }
1247 #endif /* __linux__ || __sun__ */
1248
1249 #if defined(__linux__)
1250 typedef struct {
1251     int fd;
1252     int mode;
1253 } ParallelCharDriver;
1254
1255 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1256 {
1257     if (s->mode != mode) {
1258         int m = mode;
1259         if (ioctl(s->fd, PPSETMODE, &m) < 0)
1260             return 0;
1261         s->mode = mode;
1262     }
1263     return 1;
1264 }
1265
1266 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1267 {
1268     ParallelCharDriver *drv = chr->opaque;
1269     int fd = drv->fd;
1270     uint8_t b;
1271
1272     switch(cmd) {
1273     case CHR_IOCTL_PP_READ_DATA:
1274         if (ioctl(fd, PPRDATA, &b) < 0)
1275             return -ENOTSUP;
1276         *(uint8_t *)arg = b;
1277         break;
1278     case CHR_IOCTL_PP_WRITE_DATA:
1279         b = *(uint8_t *)arg;
1280         if (ioctl(fd, PPWDATA, &b) < 0)
1281             return -ENOTSUP;
1282         break;
1283     case CHR_IOCTL_PP_READ_CONTROL:
1284         if (ioctl(fd, PPRCONTROL, &b) < 0)
1285             return -ENOTSUP;
1286         /* Linux gives only the lowest bits, and no way to know data
1287            direction! For better compatibility set the fixed upper
1288            bits. */
1289         *(uint8_t *)arg = b | 0xc0;
1290         break;
1291     case CHR_IOCTL_PP_WRITE_CONTROL:
1292         b = *(uint8_t *)arg;
1293         if (ioctl(fd, PPWCONTROL, &b) < 0)
1294             return -ENOTSUP;
1295         break;
1296     case CHR_IOCTL_PP_READ_STATUS:
1297         if (ioctl(fd, PPRSTATUS, &b) < 0)
1298             return -ENOTSUP;
1299         *(uint8_t *)arg = b;
1300         break;
1301     case CHR_IOCTL_PP_DATA_DIR:
1302         if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1303             return -ENOTSUP;
1304         break;
1305     case CHR_IOCTL_PP_EPP_READ_ADDR:
1306         if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1307             struct ParallelIOArg *parg = arg;
1308             int n = read(fd, parg->buffer, parg->count);
1309             if (n != parg->count) {
1310                 return -EIO;
1311             }
1312         }
1313         break;
1314     case CHR_IOCTL_PP_EPP_READ:
1315         if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1316             struct ParallelIOArg *parg = arg;
1317             int n = read(fd, parg->buffer, parg->count);
1318             if (n != parg->count) {
1319                 return -EIO;
1320             }
1321         }
1322         break;
1323     case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1324         if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1325             struct ParallelIOArg *parg = arg;
1326             int n = write(fd, parg->buffer, parg->count);
1327             if (n != parg->count) {
1328                 return -EIO;
1329             }
1330         }
1331         break;
1332     case CHR_IOCTL_PP_EPP_WRITE:
1333         if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1334             struct ParallelIOArg *parg = arg;
1335             int n = write(fd, parg->buffer, parg->count);
1336             if (n != parg->count) {
1337                 return -EIO;
1338             }
1339         }
1340         break;
1341     default:
1342         return -ENOTSUP;
1343     }
1344     return 0;
1345 }
1346
1347 static void pp_close(CharDriverState *chr)
1348 {
1349     ParallelCharDriver *drv = chr->opaque;
1350     int fd = drv->fd;
1351
1352     pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1353     ioctl(fd, PPRELEASE);
1354     close(fd);
1355     g_free(drv);
1356     qemu_chr_event(chr, CHR_EVENT_CLOSED);
1357 }
1358
1359 static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr)
1360 {
1361     const char *filename = qemu_opt_get(opts, "path");
1362     CharDriverState *chr;
1363     ParallelCharDriver *drv;
1364     int fd;
1365
1366     TFR(fd = open(filename, O_RDWR));
1367     if (fd < 0) {
1368         return -errno;
1369     }
1370
1371     if (ioctl(fd, PPCLAIM) < 0) {
1372         close(fd);
1373         return -errno;
1374     }
1375
1376     drv = g_malloc0(sizeof(ParallelCharDriver));
1377     drv->fd = fd;
1378     drv->mode = IEEE1284_MODE_COMPAT;
1379
1380     chr = g_malloc0(sizeof(CharDriverState));
1381     chr->chr_write = null_chr_write;
1382     chr->chr_ioctl = pp_ioctl;
1383     chr->chr_close = pp_close;
1384     chr->opaque = drv;
1385
1386     qemu_chr_generic_open(chr);
1387
1388     *_chr = chr;
1389     return 0;
1390 }
1391 #endif /* __linux__ */
1392
1393 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1394 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1395 {
1396     int fd = (int)(intptr_t)chr->opaque;
1397     uint8_t b;
1398
1399     switch(cmd) {
1400     case CHR_IOCTL_PP_READ_DATA:
1401         if (ioctl(fd, PPIGDATA, &b) < 0)
1402             return -ENOTSUP;
1403         *(uint8_t *)arg = b;
1404         break;
1405     case CHR_IOCTL_PP_WRITE_DATA:
1406         b = *(uint8_t *)arg;
1407         if (ioctl(fd, PPISDATA, &b) < 0)
1408             return -ENOTSUP;
1409         break;
1410     case CHR_IOCTL_PP_READ_CONTROL:
1411         if (ioctl(fd, PPIGCTRL, &b) < 0)
1412             return -ENOTSUP;
1413         *(uint8_t *)arg = b;
1414         break;
1415     case CHR_IOCTL_PP_WRITE_CONTROL:
1416         b = *(uint8_t *)arg;
1417         if (ioctl(fd, PPISCTRL, &b) < 0)
1418             return -ENOTSUP;
1419         break;
1420     case CHR_IOCTL_PP_READ_STATUS:
1421         if (ioctl(fd, PPIGSTATUS, &b) < 0)
1422             return -ENOTSUP;
1423         *(uint8_t *)arg = b;
1424         break;
1425     default:
1426         return -ENOTSUP;
1427     }
1428     return 0;
1429 }
1430
1431 static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr)
1432 {
1433     const char *filename = qemu_opt_get(opts, "path");
1434     CharDriverState *chr;
1435     int fd;
1436
1437     fd = qemu_open(filename, O_RDWR);
1438     if (fd < 0) {
1439         return -errno;
1440     }
1441
1442     chr = g_malloc0(sizeof(CharDriverState));
1443     chr->opaque = (void *)(intptr_t)fd;
1444     chr->chr_write = null_chr_write;
1445     chr->chr_ioctl = pp_ioctl;
1446
1447     *_chr = chr;
1448     return 0;
1449 }
1450 #endif
1451
1452 #else /* _WIN32 */
1453
1454 typedef struct {
1455     int max_size;
1456     HANDLE hcom, hrecv, hsend;
1457     OVERLAPPED orecv, osend;
1458     BOOL fpipe;
1459     DWORD len;
1460 } WinCharState;
1461
1462 #define NSENDBUF 2048
1463 #define NRECVBUF 2048
1464 #define MAXCONNECT 1
1465 #define NTIMEOUT 5000
1466
1467 static int win_chr_poll(void *opaque);
1468 static int win_chr_pipe_poll(void *opaque);
1469
1470 static void win_chr_close(CharDriverState *chr)
1471 {
1472     WinCharState *s = chr->opaque;
1473
1474     if (s->hsend) {
1475         CloseHandle(s->hsend);
1476         s->hsend = NULL;
1477     }
1478     if (s->hrecv) {
1479         CloseHandle(s->hrecv);
1480         s->hrecv = NULL;
1481     }
1482     if (s->hcom) {
1483         CloseHandle(s->hcom);
1484         s->hcom = NULL;
1485     }
1486     if (s->fpipe)
1487         qemu_del_polling_cb(win_chr_pipe_poll, chr);
1488     else
1489         qemu_del_polling_cb(win_chr_poll, chr);
1490
1491     qemu_chr_event(chr, CHR_EVENT_CLOSED);
1492 }
1493
1494 static int win_chr_init(CharDriverState *chr, const char *filename)
1495 {
1496     WinCharState *s = chr->opaque;
1497     COMMCONFIG comcfg;
1498     COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1499     COMSTAT comstat;
1500     DWORD size;
1501     DWORD err;
1502
1503     s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1504     if (!s->hsend) {
1505         fprintf(stderr, "Failed CreateEvent\n");
1506         goto fail;
1507     }
1508     s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1509     if (!s->hrecv) {
1510         fprintf(stderr, "Failed CreateEvent\n");
1511         goto fail;
1512     }
1513
1514     s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1515                       OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1516     if (s->hcom == INVALID_HANDLE_VALUE) {
1517         fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1518         s->hcom = NULL;
1519         goto fail;
1520     }
1521
1522     if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1523         fprintf(stderr, "Failed SetupComm\n");
1524         goto fail;
1525     }
1526
1527     ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1528     size = sizeof(COMMCONFIG);
1529     GetDefaultCommConfig(filename, &comcfg, &size);
1530     comcfg.dcb.DCBlength = sizeof(DCB);
1531     CommConfigDialog(filename, NULL, &comcfg);
1532
1533     if (!SetCommState(s->hcom, &comcfg.dcb)) {
1534         fprintf(stderr, "Failed SetCommState\n");
1535         goto fail;
1536     }
1537
1538     if (!SetCommMask(s->hcom, EV_ERR)) {
1539         fprintf(stderr, "Failed SetCommMask\n");
1540         goto fail;
1541     }
1542
1543     cto.ReadIntervalTimeout = MAXDWORD;
1544     if (!SetCommTimeouts(s->hcom, &cto)) {
1545         fprintf(stderr, "Failed SetCommTimeouts\n");
1546         goto fail;
1547     }
1548
1549     if (!ClearCommError(s->hcom, &err, &comstat)) {
1550         fprintf(stderr, "Failed ClearCommError\n");
1551         goto fail;
1552     }
1553     qemu_add_polling_cb(win_chr_poll, chr);
1554     return 0;
1555
1556  fail:
1557     win_chr_close(chr);
1558     return -1;
1559 }
1560
1561 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1562 {
1563     WinCharState *s = chr->opaque;
1564     DWORD len, ret, size, err;
1565
1566     len = len1;
1567     ZeroMemory(&s->osend, sizeof(s->osend));
1568     s->osend.hEvent = s->hsend;
1569     while (len > 0) {
1570         if (s->hsend)
1571             ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1572         else
1573             ret = WriteFile(s->hcom, buf, len, &size, NULL);
1574         if (!ret) {
1575             err = GetLastError();
1576             if (err == ERROR_IO_PENDING) {
1577                 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1578                 if (ret) {
1579                     buf += size;
1580                     len -= size;
1581                 } else {
1582                     break;
1583                 }
1584             } else {
1585                 break;
1586             }
1587         } else {
1588             buf += size;
1589             len -= size;
1590         }
1591     }
1592     return len1 - len;
1593 }
1594
1595 static int win_chr_read_poll(CharDriverState *chr)
1596 {
1597     WinCharState *s = chr->opaque;
1598
1599     s->max_size = qemu_chr_be_can_write(chr);
1600     return s->max_size;
1601 }
1602
1603 static void win_chr_readfile(CharDriverState *chr)
1604 {
1605     WinCharState *s = chr->opaque;
1606     int ret, err;
1607     uint8_t buf[READ_BUF_LEN];
1608     DWORD size;
1609
1610     ZeroMemory(&s->orecv, sizeof(s->orecv));
1611     s->orecv.hEvent = s->hrecv;
1612     ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1613     if (!ret) {
1614         err = GetLastError();
1615         if (err == ERROR_IO_PENDING) {
1616             ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1617         }
1618     }
1619
1620     if (size > 0) {
1621         qemu_chr_be_write(chr, buf, size);
1622     }
1623 }
1624
1625 static void win_chr_read(CharDriverState *chr)
1626 {
1627     WinCharState *s = chr->opaque;
1628
1629     if (s->len > s->max_size)
1630         s->len = s->max_size;
1631     if (s->len == 0)
1632         return;
1633
1634     win_chr_readfile(chr);
1635 }
1636
1637 static int win_chr_poll(void *opaque)
1638 {
1639     CharDriverState *chr = opaque;
1640     WinCharState *s = chr->opaque;
1641     COMSTAT status;
1642     DWORD comerr;
1643
1644     ClearCommError(s->hcom, &comerr, &status);
1645     if (status.cbInQue > 0) {
1646         s->len = status.cbInQue;
1647         win_chr_read_poll(chr);
1648         win_chr_read(chr);
1649         return 1;
1650     }
1651     return 0;
1652 }
1653
1654 static int qemu_chr_open_win(QemuOpts *opts, CharDriverState **_chr)
1655 {
1656     const char *filename = qemu_opt_get(opts, "path");
1657     CharDriverState *chr;
1658     WinCharState *s;
1659
1660     chr = g_malloc0(sizeof(CharDriverState));
1661     s = g_malloc0(sizeof(WinCharState));
1662     chr->opaque = s;
1663     chr->chr_write = win_chr_write;
1664     chr->chr_close = win_chr_close;
1665
1666     if (win_chr_init(chr, filename) < 0) {
1667         free(s);
1668         free(chr);
1669         return -EIO;
1670     }
1671     qemu_chr_generic_open(chr);
1672
1673     *_chr = chr;
1674     return 0;
1675 }
1676
1677 static int win_chr_pipe_poll(void *opaque)
1678 {
1679     CharDriverState *chr = opaque;
1680     WinCharState *s = chr->opaque;
1681     DWORD size;
1682
1683     PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1684     if (size > 0) {
1685         s->len = size;
1686         win_chr_read_poll(chr);
1687         win_chr_read(chr);
1688         return 1;
1689     }
1690     return 0;
1691 }
1692
1693 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1694 {
1695     WinCharState *s = chr->opaque;
1696     OVERLAPPED ov;
1697     int ret;
1698     DWORD size;
1699     char openname[256];
1700
1701     s->fpipe = TRUE;
1702
1703     s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1704     if (!s->hsend) {
1705         fprintf(stderr, "Failed CreateEvent\n");
1706         goto fail;
1707     }
1708     s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1709     if (!s->hrecv) {
1710         fprintf(stderr, "Failed CreateEvent\n");
1711         goto fail;
1712     }
1713
1714     snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1715     s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1716                               PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1717                               PIPE_WAIT,
1718                               MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1719     if (s->hcom == INVALID_HANDLE_VALUE) {
1720         fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1721         s->hcom = NULL;
1722         goto fail;
1723     }
1724
1725     ZeroMemory(&ov, sizeof(ov));
1726     ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1727     ret = ConnectNamedPipe(s->hcom, &ov);
1728     if (ret) {
1729         fprintf(stderr, "Failed ConnectNamedPipe\n");
1730         goto fail;
1731     }
1732
1733     ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1734     if (!ret) {
1735         fprintf(stderr, "Failed GetOverlappedResult\n");
1736         if (ov.hEvent) {
1737             CloseHandle(ov.hEvent);
1738             ov.hEvent = NULL;
1739         }
1740         goto fail;
1741     }
1742
1743     if (ov.hEvent) {
1744         CloseHandle(ov.hEvent);
1745         ov.hEvent = NULL;
1746     }
1747     qemu_add_polling_cb(win_chr_pipe_poll, chr);
1748     return 0;
1749
1750  fail:
1751     win_chr_close(chr);
1752     return -1;
1753 }
1754
1755
1756 static int qemu_chr_open_win_pipe(QemuOpts *opts, CharDriverState **_chr)
1757 {
1758     const char *filename = qemu_opt_get(opts, "path");
1759     CharDriverState *chr;
1760     WinCharState *s;
1761
1762     chr = g_malloc0(sizeof(CharDriverState));
1763     s = g_malloc0(sizeof(WinCharState));
1764     chr->opaque = s;
1765     chr->chr_write = win_chr_write;
1766     chr->chr_close = win_chr_close;
1767
1768     if (win_chr_pipe_init(chr, filename) < 0) {
1769         free(s);
1770         free(chr);
1771         return -EIO;
1772     }
1773     qemu_chr_generic_open(chr);
1774
1775     *_chr = chr;
1776     return 0;
1777 }
1778
1779 static int qemu_chr_open_win_file(HANDLE fd_out, CharDriverState **pchr)
1780 {
1781     CharDriverState *chr;
1782     WinCharState *s;
1783
1784     chr = g_malloc0(sizeof(CharDriverState));
1785     s = g_malloc0(sizeof(WinCharState));
1786     s->hcom = fd_out;
1787     chr->opaque = s;
1788     chr->chr_write = win_chr_write;
1789     qemu_chr_generic_open(chr);
1790     *pchr = chr;
1791     return 0;
1792 }
1793
1794 static int qemu_chr_open_win_con(QemuOpts *opts, CharDriverState **chr)
1795 {
1796     return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE), chr);
1797 }
1798
1799 static int qemu_chr_open_win_file_out(QemuOpts *opts, CharDriverState **_chr)
1800 {
1801     const char *file_out = qemu_opt_get(opts, "path");
1802     HANDLE fd_out;
1803
1804     fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1805                         OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1806     if (fd_out == INVALID_HANDLE_VALUE) {
1807         return -EIO;
1808     }
1809
1810     return qemu_chr_open_win_file(fd_out, _chr);
1811 }
1812 #endif /* !_WIN32 */
1813
1814 /***********************************************************/
1815 /* UDP Net console */
1816
1817 typedef struct {
1818     int fd;
1819     uint8_t buf[READ_BUF_LEN];
1820     int bufcnt;
1821     int bufptr;
1822     int max_size;
1823 } NetCharDriver;
1824
1825 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1826 {
1827     NetCharDriver *s = chr->opaque;
1828
1829     return send(s->fd, (const void *)buf, len, 0);
1830 }
1831
1832 static int udp_chr_read_poll(void *opaque)
1833 {
1834     CharDriverState *chr = opaque;
1835     NetCharDriver *s = chr->opaque;
1836
1837     s->max_size = qemu_chr_be_can_write(chr);
1838
1839     /* If there were any stray characters in the queue process them
1840      * first
1841      */
1842     while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1843         qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
1844         s->bufptr++;
1845         s->max_size = qemu_chr_be_can_write(chr);
1846     }
1847     return s->max_size;
1848 }
1849
1850 static void udp_chr_read(void *opaque)
1851 {
1852     CharDriverState *chr = opaque;
1853     NetCharDriver *s = chr->opaque;
1854
1855     if (s->max_size == 0)
1856         return;
1857     s->bufcnt = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0);
1858     s->bufptr = s->bufcnt;
1859     if (s->bufcnt <= 0)
1860         return;
1861
1862     s->bufptr = 0;
1863     while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1864         qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
1865         s->bufptr++;
1866         s->max_size = qemu_chr_be_can_write(chr);
1867     }
1868 }
1869
1870 static void udp_chr_update_read_handler(CharDriverState *chr)
1871 {
1872     NetCharDriver *s = chr->opaque;
1873
1874     if (s->fd >= 0) {
1875         qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
1876                              udp_chr_read, NULL, chr);
1877     }
1878 }
1879
1880 static void udp_chr_close(CharDriverState *chr)
1881 {
1882     NetCharDriver *s = chr->opaque;
1883     if (s->fd >= 0) {
1884         qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
1885         closesocket(s->fd);
1886     }
1887     g_free(s);
1888     qemu_chr_event(chr, CHR_EVENT_CLOSED);
1889 }
1890
1891 static int qemu_chr_open_udp(QemuOpts *opts, CharDriverState **_chr)
1892 {
1893     CharDriverState *chr = NULL;
1894     NetCharDriver *s = NULL;
1895     int fd = -1;
1896     int ret;
1897
1898     chr = g_malloc0(sizeof(CharDriverState));
1899     s = g_malloc0(sizeof(NetCharDriver));
1900
1901     fd = inet_dgram_opts(opts);
1902     if (fd < 0) {
1903         fprintf(stderr, "inet_dgram_opts failed\n");
1904         ret = -errno;
1905         goto return_err;
1906     }
1907
1908     s->fd = fd;
1909     s->bufcnt = 0;
1910     s->bufptr = 0;
1911     chr->opaque = s;
1912     chr->chr_write = udp_chr_write;
1913     chr->chr_update_read_handler = udp_chr_update_read_handler;
1914     chr->chr_close = udp_chr_close;
1915
1916     *_chr = chr;
1917     return 0;
1918
1919 return_err:
1920     g_free(chr);
1921     g_free(s);
1922     if (fd >= 0) {
1923         closesocket(fd);
1924     }
1925     return ret;
1926 }
1927
1928 /***********************************************************/
1929 /* TCP Net console */
1930
1931 typedef struct {
1932     int fd, listen_fd;
1933     int connected;
1934     int max_size;
1935     int do_telnetopt;
1936     int do_nodelay;
1937     int is_unix;
1938     int msgfd;
1939 } TCPCharDriver;
1940
1941 static void tcp_chr_accept(void *opaque);
1942
1943 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1944 {
1945     TCPCharDriver *s = chr->opaque;
1946     if (s->connected) {
1947         return send_all(s->fd, buf, len);
1948     } else {
1949         /* XXX: indicate an error ? */
1950         return len;
1951     }
1952 }
1953
1954 static int tcp_chr_read_poll(void *opaque)
1955 {
1956     CharDriverState *chr = opaque;
1957     TCPCharDriver *s = chr->opaque;
1958     if (!s->connected)
1959         return 0;
1960     s->max_size = qemu_chr_be_can_write(chr);
1961     return s->max_size;
1962 }
1963
1964 #define IAC 255
1965 #define IAC_BREAK 243
1966 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
1967                                       TCPCharDriver *s,
1968                                       uint8_t *buf, int *size)
1969 {
1970     /* Handle any telnet client's basic IAC options to satisfy char by
1971      * char mode with no echo.  All IAC options will be removed from
1972      * the buf and the do_telnetopt variable will be used to track the
1973      * state of the width of the IAC information.
1974      *
1975      * IAC commands come in sets of 3 bytes with the exception of the
1976      * "IAC BREAK" command and the double IAC.
1977      */
1978
1979     int i;
1980     int j = 0;
1981
1982     for (i = 0; i < *size; i++) {
1983         if (s->do_telnetopt > 1) {
1984             if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
1985                 /* Double IAC means send an IAC */
1986                 if (j != i)
1987                     buf[j] = buf[i];
1988                 j++;
1989                 s->do_telnetopt = 1;
1990             } else {
1991                 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
1992                     /* Handle IAC break commands by sending a serial break */
1993                     qemu_chr_event(chr, CHR_EVENT_BREAK);
1994                     s->do_telnetopt++;
1995                 }
1996                 s->do_telnetopt++;
1997             }
1998             if (s->do_telnetopt >= 4) {
1999                 s->do_telnetopt = 1;
2000             }
2001         } else {
2002             if ((unsigned char)buf[i] == IAC) {
2003                 s->do_telnetopt = 2;
2004             } else {
2005                 if (j != i)
2006                     buf[j] = buf[i];
2007                 j++;
2008             }
2009         }
2010     }
2011     *size = j;
2012 }
2013
2014 static int tcp_get_msgfd(CharDriverState *chr)
2015 {
2016     TCPCharDriver *s = chr->opaque;
2017     int fd = s->msgfd;
2018     s->msgfd = -1;
2019     return fd;
2020 }
2021
2022 #ifndef _WIN32
2023 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2024 {
2025     TCPCharDriver *s = chr->opaque;
2026     struct cmsghdr *cmsg;
2027
2028     for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2029         int fd;
2030
2031         if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2032             cmsg->cmsg_level != SOL_SOCKET ||
2033             cmsg->cmsg_type != SCM_RIGHTS)
2034             continue;
2035
2036         fd = *((int *)CMSG_DATA(cmsg));
2037         if (fd < 0)
2038             continue;
2039
2040         if (s->msgfd != -1)
2041             close(s->msgfd);
2042         s->msgfd = fd;
2043     }
2044 }
2045
2046 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2047 {
2048     TCPCharDriver *s = chr->opaque;
2049     struct msghdr msg = { NULL, };
2050     struct iovec iov[1];
2051     union {
2052         struct cmsghdr cmsg;
2053         char control[CMSG_SPACE(sizeof(int))];
2054     } msg_control;
2055     ssize_t ret;
2056
2057     iov[0].iov_base = buf;
2058     iov[0].iov_len = len;
2059
2060     msg.msg_iov = iov;
2061     msg.msg_iovlen = 1;
2062     msg.msg_control = &msg_control;
2063     msg.msg_controllen = sizeof(msg_control);
2064
2065     ret = recvmsg(s->fd, &msg, 0);
2066     if (ret > 0 && s->is_unix)
2067         unix_process_msgfd(chr, &msg);
2068
2069     return ret;
2070 }
2071 #else
2072 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2073 {
2074     TCPCharDriver *s = chr->opaque;
2075     return qemu_recv(s->fd, buf, len, 0);
2076 }
2077 #endif
2078
2079 static void tcp_chr_read(void *opaque)
2080 {
2081     CharDriverState *chr = opaque;
2082     TCPCharDriver *s = chr->opaque;
2083     uint8_t buf[READ_BUF_LEN];
2084     int len, size;
2085
2086     if (!s->connected || s->max_size <= 0)
2087         return;
2088     len = sizeof(buf);
2089     if (len > s->max_size)
2090         len = s->max_size;
2091     size = tcp_chr_recv(chr, (void *)buf, len);
2092     if (size == 0) {
2093         /* connection closed */
2094         s->connected = 0;
2095         if (s->listen_fd >= 0) {
2096             qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2097         }
2098         qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2099         closesocket(s->fd);
2100         s->fd = -1;
2101         qemu_chr_event(chr, CHR_EVENT_CLOSED);
2102     } else if (size > 0) {
2103         if (s->do_telnetopt)
2104             tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2105         if (size > 0)
2106             qemu_chr_be_write(chr, buf, size);
2107     }
2108 }
2109
2110 #ifndef _WIN32
2111 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2112 {
2113     return qemu_chr_open_fd(eventfd, eventfd);
2114 }
2115 #endif
2116
2117 static void tcp_chr_connect(void *opaque)
2118 {
2119     CharDriverState *chr = opaque;
2120     TCPCharDriver *s = chr->opaque;
2121
2122     s->connected = 1;
2123     qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2124                          tcp_chr_read, NULL, chr);
2125     qemu_chr_generic_open(chr);
2126 }
2127
2128 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2129 static void tcp_chr_telnet_init(int fd)
2130 {
2131     char buf[3];
2132     /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2133     IACSET(buf, 0xff, 0xfb, 0x01);  /* IAC WILL ECHO */
2134     send(fd, (char *)buf, 3, 0);
2135     IACSET(buf, 0xff, 0xfb, 0x03);  /* IAC WILL Suppress go ahead */
2136     send(fd, (char *)buf, 3, 0);
2137     IACSET(buf, 0xff, 0xfb, 0x00);  /* IAC WILL Binary */
2138     send(fd, (char *)buf, 3, 0);
2139     IACSET(buf, 0xff, 0xfd, 0x00);  /* IAC DO Binary */
2140     send(fd, (char *)buf, 3, 0);
2141 }
2142
2143 static void socket_set_nodelay(int fd)
2144 {
2145     int val = 1;
2146     setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2147 }
2148
2149 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2150 {
2151     TCPCharDriver *s = chr->opaque;
2152     if (s->fd != -1)
2153         return -1;
2154
2155     socket_set_nonblock(fd);
2156     if (s->do_nodelay)
2157         socket_set_nodelay(fd);
2158     s->fd = fd;
2159     qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2160     tcp_chr_connect(chr);
2161
2162     return 0;
2163 }
2164
2165 static void tcp_chr_accept(void *opaque)
2166 {
2167     CharDriverState *chr = opaque;
2168     TCPCharDriver *s = chr->opaque;
2169     struct sockaddr_in saddr;
2170 #ifndef _WIN32
2171     struct sockaddr_un uaddr;
2172 #endif
2173     struct sockaddr *addr;
2174     socklen_t len;
2175     int fd;
2176
2177     for(;;) {
2178 #ifndef _WIN32
2179         if (s->is_unix) {
2180             len = sizeof(uaddr);
2181             addr = (struct sockaddr *)&uaddr;
2182         } else
2183 #endif
2184         {
2185             len = sizeof(saddr);
2186             addr = (struct sockaddr *)&saddr;
2187         }
2188         fd = qemu_accept(s->listen_fd, addr, &len);
2189         if (fd < 0 && errno != EINTR) {
2190             return;
2191         } else if (fd >= 0) {
2192             if (s->do_telnetopt)
2193                 tcp_chr_telnet_init(fd);
2194             break;
2195         }
2196     }
2197     if (tcp_chr_add_client(chr, fd) < 0)
2198         close(fd);
2199 }
2200
2201 static void tcp_chr_close(CharDriverState *chr)
2202 {
2203     TCPCharDriver *s = chr->opaque;
2204     if (s->fd >= 0) {
2205         qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2206         closesocket(s->fd);
2207     }
2208     if (s->listen_fd >= 0) {
2209         qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2210         closesocket(s->listen_fd);
2211     }
2212     g_free(s);
2213     qemu_chr_event(chr, CHR_EVENT_CLOSED);
2214 }
2215
2216 static int qemu_chr_open_socket(QemuOpts *opts, CharDriverState **_chr)
2217 {
2218     CharDriverState *chr = NULL;
2219     TCPCharDriver *s = NULL;
2220     int fd = -1;
2221     int is_listen;
2222     int is_waitconnect;
2223     int do_nodelay;
2224     int is_unix;
2225     int is_telnet;
2226     int ret;
2227
2228     is_listen      = qemu_opt_get_bool(opts, "server", 0);
2229     is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2230     is_telnet      = qemu_opt_get_bool(opts, "telnet", 0);
2231     do_nodelay     = !qemu_opt_get_bool(opts, "delay", 1);
2232     is_unix        = qemu_opt_get(opts, "path") != NULL;
2233     if (!is_listen)
2234         is_waitconnect = 0;
2235
2236     chr = g_malloc0(sizeof(CharDriverState));
2237     s = g_malloc0(sizeof(TCPCharDriver));
2238
2239     if (is_unix) {
2240         if (is_listen) {
2241             fd = unix_listen_opts(opts);
2242         } else {
2243             fd = unix_connect_opts(opts);
2244         }
2245     } else {
2246         if (is_listen) {
2247             fd = inet_listen_opts(opts, 0);
2248         } else {
2249             fd = inet_connect_opts(opts);
2250         }
2251     }
2252     if (fd < 0) {
2253         ret = -errno;
2254         goto fail;
2255     }
2256
2257     if (!is_waitconnect)
2258         socket_set_nonblock(fd);
2259
2260     s->connected = 0;
2261     s->fd = -1;
2262     s->listen_fd = -1;
2263     s->msgfd = -1;
2264     s->is_unix = is_unix;
2265     s->do_nodelay = do_nodelay && !is_unix;
2266
2267     chr->opaque = s;
2268     chr->chr_write = tcp_chr_write;
2269     chr->chr_close = tcp_chr_close;
2270     chr->get_msgfd = tcp_get_msgfd;
2271     chr->chr_add_client = tcp_chr_add_client;
2272
2273     if (is_listen) {
2274         s->listen_fd = fd;
2275         qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2276         if (is_telnet)
2277             s->do_telnetopt = 1;
2278
2279     } else {
2280         s->connected = 1;
2281         s->fd = fd;
2282         socket_set_nodelay(fd);
2283         tcp_chr_connect(chr);
2284     }
2285
2286     /* for "info chardev" monitor command */
2287     chr->filename = g_malloc(256);
2288     if (is_unix) {
2289         snprintf(chr->filename, 256, "unix:%s%s",
2290                  qemu_opt_get(opts, "path"),
2291                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2292     } else if (is_telnet) {
2293         snprintf(chr->filename, 256, "telnet:%s:%s%s",
2294                  qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2295                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2296     } else {
2297         snprintf(chr->filename, 256, "tcp:%s:%s%s",
2298                  qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2299                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2300     }
2301
2302     if (is_listen && is_waitconnect) {
2303         printf("QEMU waiting for connection on: %s\n",
2304                chr->filename);
2305         tcp_chr_accept(chr);
2306         socket_set_nonblock(s->listen_fd);
2307     }
2308
2309     *_chr = chr;
2310     return 0;
2311
2312  fail:
2313     if (fd >= 0)
2314         closesocket(fd);
2315     g_free(s);
2316     g_free(chr);
2317     return ret;
2318 }
2319
2320 /***********************************************************/
2321 /* Memory chardev */
2322 typedef struct {
2323     size_t outbuf_size;
2324     size_t outbuf_capacity;
2325     uint8_t *outbuf;
2326 } MemoryDriver;
2327
2328 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2329 {
2330     MemoryDriver *d = chr->opaque;
2331
2332     /* TODO: the QString implementation has the same code, we should
2333      * introduce a generic way to do this in cutils.c */
2334     if (d->outbuf_capacity < d->outbuf_size + len) {
2335         /* grow outbuf */
2336         d->outbuf_capacity += len;
2337         d->outbuf_capacity *= 2;
2338         d->outbuf = g_realloc(d->outbuf, d->outbuf_capacity);
2339     }
2340
2341     memcpy(d->outbuf + d->outbuf_size, buf, len);
2342     d->outbuf_size += len;
2343
2344     return len;
2345 }
2346
2347 void qemu_chr_init_mem(CharDriverState *chr)
2348 {
2349     MemoryDriver *d;
2350
2351     d = g_malloc(sizeof(*d));
2352     d->outbuf_size = 0;
2353     d->outbuf_capacity = 4096;
2354     d->outbuf = g_malloc0(d->outbuf_capacity);
2355
2356     memset(chr, 0, sizeof(*chr));
2357     chr->opaque = d;
2358     chr->chr_write = mem_chr_write;
2359 }
2360
2361 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2362 {
2363     MemoryDriver *d = chr->opaque;
2364     return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2365 }
2366
2367 /* NOTE: this driver can not be closed with qemu_chr_delete()! */
2368 void qemu_chr_close_mem(CharDriverState *chr)
2369 {
2370     MemoryDriver *d = chr->opaque;
2371
2372     g_free(d->outbuf);
2373     g_free(chr->opaque);
2374     chr->opaque = NULL;
2375     chr->chr_write = NULL;
2376 }
2377
2378 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2379 {
2380     const MemoryDriver *d = chr->opaque;
2381     return d->outbuf_size;
2382 }
2383
2384 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2385 {
2386     char host[65], port[33], width[8], height[8];
2387     int pos;
2388     const char *p;
2389     QemuOpts *opts;
2390
2391     opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
2392     if (NULL == opts)
2393         return NULL;
2394
2395     if (strstart(filename, "mon:", &p)) {
2396         filename = p;
2397         qemu_opt_set(opts, "mux", "on");
2398     }
2399
2400     if (strcmp(filename, "null")    == 0 ||
2401         strcmp(filename, "pty")     == 0 ||
2402         strcmp(filename, "msmouse") == 0 ||
2403         strcmp(filename, "braille") == 0 ||
2404         strcmp(filename, "stdio")   == 0) {
2405         qemu_opt_set(opts, "backend", filename);
2406         return opts;
2407     }
2408     if (strstart(filename, "vc", &p)) {
2409         qemu_opt_set(opts, "backend", "vc");
2410         if (*p == ':') {
2411             if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2412                 /* pixels */
2413                 qemu_opt_set(opts, "width", width);
2414                 qemu_opt_set(opts, "height", height);
2415             } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2416                 /* chars */
2417                 qemu_opt_set(opts, "cols", width);
2418                 qemu_opt_set(opts, "rows", height);
2419             } else {
2420                 goto fail;
2421             }
2422         }
2423         return opts;
2424     }
2425     if (strcmp(filename, "con:") == 0) {
2426         qemu_opt_set(opts, "backend", "console");
2427         return opts;
2428     }
2429     if (strstart(filename, "COM", NULL)) {
2430         qemu_opt_set(opts, "backend", "serial");
2431         qemu_opt_set(opts, "path", filename);
2432         return opts;
2433     }
2434     if (strstart(filename, "file:", &p)) {
2435         qemu_opt_set(opts, "backend", "file");
2436         qemu_opt_set(opts, "path", p);
2437         return opts;
2438     }
2439     if (strstart(filename, "pipe:", &p)) {
2440         qemu_opt_set(opts, "backend", "pipe");
2441         qemu_opt_set(opts, "path", p);
2442         return opts;
2443     }
2444     if (strstart(filename, "tcp:", &p) ||
2445         strstart(filename, "telnet:", &p)) {
2446         if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2447             host[0] = 0;
2448             if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2449                 goto fail;
2450         }
2451         qemu_opt_set(opts, "backend", "socket");
2452         qemu_opt_set(opts, "host", host);
2453         qemu_opt_set(opts, "port", port);
2454         if (p[pos] == ',') {
2455             if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2456                 goto fail;
2457         }
2458         if (strstart(filename, "telnet:", &p))
2459             qemu_opt_set(opts, "telnet", "on");
2460         return opts;
2461     }
2462     if (strstart(filename, "udp:", &p)) {
2463         qemu_opt_set(opts, "backend", "udp");
2464         if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2465             host[0] = 0;
2466             if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2467                 goto fail;
2468             }
2469         }
2470         qemu_opt_set(opts, "host", host);
2471         qemu_opt_set(opts, "port", port);
2472         if (p[pos] == '@') {
2473             p += pos + 1;
2474             if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2475                 host[0] = 0;
2476                 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2477                     goto fail;
2478                 }
2479             }
2480             qemu_opt_set(opts, "localaddr", host);
2481             qemu_opt_set(opts, "localport", port);
2482         }
2483         return opts;
2484     }
2485     if (strstart(filename, "unix:", &p)) {
2486         qemu_opt_set(opts, "backend", "socket");
2487         if (qemu_opts_do_parse(opts, p, "path") != 0)
2488             goto fail;
2489         return opts;
2490     }
2491     if (strstart(filename, "/dev/parport", NULL) ||
2492         strstart(filename, "/dev/ppi", NULL)) {
2493         qemu_opt_set(opts, "backend", "parport");
2494         qemu_opt_set(opts, "path", filename);
2495         return opts;
2496     }
2497     if (strstart(filename, "/dev/", NULL)) {
2498         qemu_opt_set(opts, "backend", "tty");
2499         qemu_opt_set(opts, "path", filename);
2500         return opts;
2501     }
2502
2503 fail:
2504     qemu_opts_del(opts);
2505     return NULL;
2506 }
2507
2508 static const struct {
2509     const char *name;
2510     int (*open)(QemuOpts *opts, CharDriverState **chr);
2511 } backend_table[] = {
2512     { .name = "null",      .open = qemu_chr_open_null },
2513     { .name = "socket",    .open = qemu_chr_open_socket },
2514     { .name = "udp",       .open = qemu_chr_open_udp },
2515     { .name = "msmouse",   .open = qemu_chr_open_msmouse },
2516     { .name = "vc",        .open = text_console_init },
2517 #ifdef _WIN32
2518     { .name = "file",      .open = qemu_chr_open_win_file_out },
2519     { .name = "pipe",      .open = qemu_chr_open_win_pipe },
2520     { .name = "console",   .open = qemu_chr_open_win_con },
2521     { .name = "serial",    .open = qemu_chr_open_win },
2522 #else
2523     { .name = "file",      .open = qemu_chr_open_file_out },
2524     { .name = "pipe",      .open = qemu_chr_open_pipe },
2525     { .name = "pty",       .open = qemu_chr_open_pty },
2526     { .name = "stdio",     .open = qemu_chr_open_stdio },
2527 #endif
2528 #ifdef CONFIG_BRLAPI
2529     { .name = "braille",   .open = chr_baum_init },
2530 #endif
2531 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2532     || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
2533     || defined(__FreeBSD_kernel__)
2534     { .name = "tty",       .open = qemu_chr_open_tty },
2535 #endif
2536 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
2537     || defined(__FreeBSD_kernel__)
2538     { .name = "parport",   .open = qemu_chr_open_pp },
2539 #endif
2540 #ifdef CONFIG_SPICE
2541     { .name = "spicevmc",     .open = qemu_chr_open_spice },
2542 #endif
2543 };
2544
2545 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
2546                                     void (*init)(struct CharDriverState *s))
2547 {
2548     CharDriverState *chr;
2549     int i;
2550     int ret;
2551
2552     if (qemu_opts_id(opts) == NULL) {
2553         fprintf(stderr, "chardev: no id specified\n");
2554         return NULL;
2555     }
2556
2557     if (qemu_opt_get(opts, "backend") == NULL) {
2558         fprintf(stderr, "chardev: \"%s\" missing backend\n",
2559                 qemu_opts_id(opts));
2560         return NULL;
2561     }
2562     for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2563         if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2564             break;
2565     }
2566     if (i == ARRAY_SIZE(backend_table)) {
2567         fprintf(stderr, "chardev: backend \"%s\" not found\n",
2568                 qemu_opt_get(opts, "backend"));
2569         return NULL;
2570     }
2571
2572     ret = backend_table[i].open(opts, &chr);
2573     if (ret < 0) {
2574         fprintf(stderr, "chardev: opening backend \"%s\" failed: %s\n",
2575                 qemu_opt_get(opts, "backend"), strerror(-ret));
2576         return NULL;
2577     }
2578
2579     if (!chr->filename)
2580         chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
2581     chr->init = init;
2582     QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2583
2584     if (qemu_opt_get_bool(opts, "mux", 0)) {
2585         CharDriverState *base = chr;
2586         int len = strlen(qemu_opts_id(opts)) + 6;
2587         base->label = g_malloc(len);
2588         snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
2589         chr = qemu_chr_open_mux(base);
2590         chr->filename = base->filename;
2591         chr->avail_connections = MAX_MUX;
2592         QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2593     } else {
2594         chr->avail_connections = 1;
2595     }
2596     chr->label = g_strdup(qemu_opts_id(opts));
2597     return chr;
2598 }
2599
2600 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2601 {
2602     const char *p;
2603     CharDriverState *chr;
2604     QemuOpts *opts;
2605
2606     if (strstart(filename, "chardev:", &p)) {
2607         return qemu_chr_find(p);
2608     }
2609
2610     opts = qemu_chr_parse_compat(label, filename);
2611     if (!opts)
2612         return NULL;
2613
2614     chr = qemu_chr_new_from_opts(opts, init);
2615     if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
2616         monitor_init(chr, MONITOR_USE_READLINE);
2617     }
2618     qemu_opts_del(opts);
2619     return chr;
2620 }
2621
2622 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
2623 {
2624     if (chr->chr_set_echo) {
2625         chr->chr_set_echo(chr, echo);
2626     }
2627 }
2628
2629 void qemu_chr_fe_open(struct CharDriverState *chr)
2630 {
2631     if (chr->chr_guest_open) {
2632         chr->chr_guest_open(chr);
2633     }
2634 }
2635
2636 void qemu_chr_fe_close(struct CharDriverState *chr)
2637 {
2638     if (chr->chr_guest_close) {
2639         chr->chr_guest_close(chr);
2640     }
2641 }
2642
2643 void qemu_chr_delete(CharDriverState *chr)
2644 {
2645     QTAILQ_REMOVE(&chardevs, chr, next);
2646     if (chr->chr_close)
2647         chr->chr_close(chr);
2648     g_free(chr->filename);
2649     g_free(chr->label);
2650     g_free(chr);
2651 }
2652
2653 ChardevInfoList *qmp_query_chardev(Error **errp)
2654 {
2655     ChardevInfoList *chr_list = NULL;
2656     CharDriverState *chr;
2657
2658     QTAILQ_FOREACH(chr, &chardevs, next) {
2659         ChardevInfoList *info = g_malloc0(sizeof(*info));
2660         info->value = g_malloc0(sizeof(*info->value));
2661         info->value->label = g_strdup(chr->label);
2662         info->value->filename = g_strdup(chr->filename);
2663
2664         info->next = chr_list;
2665         chr_list = info;
2666     }
2667
2668     return chr_list;
2669 }
2670
2671 CharDriverState *qemu_chr_find(const char *name)
2672 {
2673     CharDriverState *chr;
2674
2675     QTAILQ_FOREACH(chr, &chardevs, next) {
2676         if (strcmp(chr->label, name) != 0)
2677             continue;
2678         return chr;
2679     }
2680     return NULL;
2681 }