qemu-char.c

   1 /*
   2  * QEMU System Emulator
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "qemu-common.h"
  25 #include "net.h"
  26 #include "monitor.h"
  27 #include "console.h"
  28 #include "sysemu.h"
  29 #include "qemu-timer.h"
  30 #include "qemu-char.h"
  31 #include "hw/usb.h"
  32 #include "hw/baum.h"
  33 #include "hw/msmouse.h"
  34 #include "qemu-objects.h"
  35
  36 #include <unistd.h>
  37 #include <fcntl.h>
  38 #include <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 #include <arpa/inet.h>
  55 #include <dirent.h>
  56 #include <netdb.h>
  57 #include <sys/select.h>
  58 #ifdef CONFIG_BSD
  59 #include <sys/stat.h>
  60 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  61 #include <libutil.h>
  62 #include <dev/ppbus/ppi.h>
  63 #include <dev/ppbus/ppbconf.h>
  64 #if defined(__GLIBC__)
  65 #include <pty.h>
  66 #endif
  67 #elif defined(__DragonFly__)
  68 #include <libutil.h>
  69 #include <dev/misc/ppi/ppi.h>
  70 #include <bus/ppbus/ppbconf.h>
  71 #else
  72 #include <util.h>
  73 #endif
  74 #else
  75 #ifdef __linux__
  76 #include <pty.h>
  77
  78 #include <linux/ppdev.h>
  79 #include <linux/parport.h>
  80 #endif
  81 #ifdef __sun__
  82 #include <sys/stat.h>
  83 #include <sys/ethernet.h>
  84 #include <sys/sockio.h>
  85 #include <netinet/arp.h>
  86 #include <netinet/in.h>
  87 #include <netinet/in_systm.h>
  88 #include <netinet/ip.h>
  89 #include <netinet/ip_icmp.h> // must come after ip.h
  90 #include <netinet/udp.h>
  91 #include <netinet/tcp.h>
  92 #include <net/if.h>
  93 #include <syslog.h>
  94 #include <stropts.h>
  95 #endif
  96 #endif
  97 #endif
  98
  99 #include "qemu_socket.h"
 100 #include "ui/qemu-spice.h"
 101
 102 #define READ_BUF_LEN 4096
 103
 104 /***********************************************************/
 105 /* character device */
 106
 107 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
 108     QTAILQ_HEAD_INITIALIZER(chardevs);
 109
 110 static void qemu_chr_event(CharDriverState *s, int event)
 111 {
 112     /* Keep track if the char device is open */
 113     switch (event) {
 114         case CHR_EVENT_OPENED:
 115             s->opened = 1;
 116             break;
 117         case CHR_EVENT_CLOSED:
 118             s->opened = 0;
 119             break;
 120     }
 121
 122     if (!s->chr_event)
 123         return;
 124     s->chr_event(s->handler_opaque, event);
 125 }
 126
 127 static void qemu_chr_generic_open_bh(void *opaque)
 128 {
 129     CharDriverState *s = opaque;
 130     qemu_chr_event(s, CHR_EVENT_OPENED);
 131     qemu_bh_delete(s->bh);
 132     s->bh = NULL;
 133 }
 134
 135 void qemu_chr_generic_open(CharDriverState *s)
 136 {
 137     if (s->bh == NULL) {
 138         s->bh = qemu_bh_new(qemu_chr_generic_open_bh, s);
 139         qemu_bh_schedule(s->bh);
 140     }
 141 }
 142
 143 int qemu_chr_write(CharDriverState *s, const uint8_t *buf, int len)
 144 {
 145     return s->chr_write(s, buf, len);
 146 }
 147
 148 int qemu_chr_ioctl(CharDriverState *s, int cmd, void *arg)
 149 {
 150     if (!s->chr_ioctl)
 151         return -ENOTSUP;
 152     return s->chr_ioctl(s, cmd, arg);
 153 }
 154
 155 int qemu_chr_can_read(CharDriverState *s)
 156 {
 157     if (!s->chr_can_read)
 158         return 0;
 159     return s->chr_can_read(s->handler_opaque);
 160 }
 161
 162 void qemu_chr_read(CharDriverState *s, uint8_t *buf, int len)
 163 {
 164     s->chr_read(s->handler_opaque, buf, len);
 165 }
 166
 167 int qemu_chr_get_msgfd(CharDriverState *s)
 168 {
 169     return s->get_msgfd ? s->get_msgfd(s) : -1;
 170 }
 171
 172 void qemu_chr_accept_input(CharDriverState *s)
 173 {
 174     if (s->chr_accept_input)
 175         s->chr_accept_input(s);
 176 }
 177
 178 void qemu_chr_printf(CharDriverState *s, const char *fmt, ...)
 179 {
 180     char buf[READ_BUF_LEN];
 181     va_list ap;
 182     va_start(ap, fmt);
 183     vsnprintf(buf, sizeof(buf), fmt, ap);
 184     qemu_chr_write(s, (uint8_t *)buf, strlen(buf));
 185     va_end(ap);
 186 }
 187
 188 void qemu_chr_send_event(CharDriverState *s, int event)
 189 {
 190     if (s->chr_send_event)
 191         s->chr_send_event(s, event);
 192 }
 193
 194 void qemu_chr_add_handlers(CharDriverState *s,
 195                            IOCanReadHandler *fd_can_read,
 196                            IOReadHandler *fd_read,
 197                            IOEventHandler *fd_event,
 198                            void *opaque)
 199 {
 200     s->chr_can_read = fd_can_read;
 201     s->chr_read = fd_read;
 202     s->chr_event = fd_event;
 203     s->handler_opaque = opaque;
 204     if (s->chr_update_read_handler)
 205         s->chr_update_read_handler(s);
 206
 207     /* We're connecting to an already opened device, so let's make sure we
 208        also get the open event */
 209     if (s->opened) {
 210         qemu_chr_generic_open(s);
 211     }
 212 }
 213
 214 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 215 {
 216     return len;
 217 }
 218
 219 static CharDriverState *qemu_chr_open_null(QemuOpts *opts)
 220 {
 221     CharDriverState *chr;
 222
 223     chr = qemu_mallocz(sizeof(CharDriverState));
 224     chr->chr_write = null_chr_write;
 225     return chr;
 226 }
 227
 228 /* MUX driver for serial I/O splitting */
 229 #define MAX_MUX 4
 230 #define MUX_BUFFER_SIZE 32      /* Must be a power of 2.  */
 231 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
 232 typedef struct {
 233     IOCanReadHandler *chr_can_read[MAX_MUX];
 234     IOReadHandler *chr_read[MAX_MUX];
 235     IOEventHandler *chr_event[MAX_MUX];
 236     void *ext_opaque[MAX_MUX];
 237     CharDriverState *drv;
 238     int focus;
 239     int mux_cnt;
 240     int term_got_escape;
 241     int max_size;
 242     /* Intermediate input buffer allows to catch escape sequences even if the
 243        currently active device is not accepting any input - but only until it
 244        is full as well. */
 245     unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
 246     int prod[MAX_MUX];
 247     int cons[MAX_MUX];
 248     int timestamps;
 249     int linestart;
 250     int64_t timestamps_start;
 251 } MuxDriver;
 252
 253
 254 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 255 {
 256     MuxDriver *d = chr->opaque;
 257     int ret;
 258     if (!d->timestamps) {
 259         ret = d->drv->chr_write(d->drv, buf, len);
 260     } else {
 261         int i;
 262
 263         ret = 0;
 264         for (i = 0; i < len; i++) {
 265             if (d->linestart) {
 266                 char buf1[64];
 267                 int64_t ti;
 268                 int secs;
 269
 270                 ti = qemu_get_clock(rt_clock);
 271                 if (d->timestamps_start == -1)
 272                     d->timestamps_start = ti;
 273                 ti -= d->timestamps_start;
 274                 secs = ti / 1000;
 275                 snprintf(buf1, sizeof(buf1),
 276                          "[%02d:%02d:%02d.%03d] ",
 277                          secs / 3600,
 278                          (secs / 60) % 60,
 279                          secs % 60,
 280                          (int)(ti % 1000));
 281                 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
 282                 d->linestart = 0;
 283             }
 284             ret += d->drv->chr_write(d->drv, buf+i, 1);
 285             if (buf[i] == '\n') {
 286                 d->linestart = 1;
 287             }
 288         }
 289     }
 290     return ret;
 291 }
 292
 293 static const char * const mux_help[] = {
 294     "% h    print this help\n\r",
 295     "% x    exit emulator\n\r",
 296     "% s    save disk data back to file (if -snapshot)\n\r",
 297     "% t    toggle console timestamps\n\r"
 298     "% b    send break (magic sysrq)\n\r",
 299     "% c    switch between console and monitor\n\r",
 300     "% %  sends %\n\r",
 301     NULL
 302 };
 303
 304 int term_escape_char = 0x01; /* ctrl-a is used for escape */
 305 static void mux_print_help(CharDriverState *chr)
 306 {
 307     int i, j;
 308     char ebuf[15] = "Escape-Char";
 309     char cbuf[50] = "\n\r";
 310
 311     if (term_escape_char > 0 && term_escape_char < 26) {
 312         snprintf(cbuf, sizeof(cbuf), "\n\r");
 313         snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
 314     } else {
 315         snprintf(cbuf, sizeof(cbuf),
 316                  "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
 317                  term_escape_char);
 318     }
 319     chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
 320     for (i = 0; mux_help[i] != NULL; i++) {
 321         for (j=0; mux_help[i][j] != '\0'; j++) {
 322             if (mux_help[i][j] == '%')
 323                 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
 324             else
 325                 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
 326         }
 327     }
 328 }
 329
 330 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
 331 {
 332     if (d->chr_event[mux_nr])
 333         d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
 334 }
 335
 336 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
 337 {
 338     if (d->term_got_escape) {
 339         d->term_got_escape = 0;
 340         if (ch == term_escape_char)
 341             goto send_char;
 342         switch(ch) {
 343         case '?':
 344         case 'h':
 345             mux_print_help(chr);
 346             break;
 347         case 'x':
 348             {
 349                  const char *term =  "QEMU: Terminated\n\r";
 350                  chr->chr_write(chr,(uint8_t *)term,strlen(term));
 351                  exit(0);
 352                  break;
 353             }
 354         case 's':
 355             bdrv_commit_all();
 356             break;
 357         case 'b':
 358             qemu_chr_event(chr, CHR_EVENT_BREAK);
 359             break;
 360         case 'c':
 361             /* Switch to the next registered device */
 362             mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
 363             d->focus++;
 364             if (d->focus >= d->mux_cnt)
 365                 d->focus = 0;
 366             mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
 367             break;
 368         case 't':
 369             d->timestamps = !d->timestamps;
 370             d->timestamps_start = -1;
 371             d->linestart = 0;
 372             break;
 373         }
 374     } else if (ch == term_escape_char) {
 375         d->term_got_escape = 1;
 376     } else {
 377     send_char:
 378         return 1;
 379     }
 380     return 0;
 381 }
 382
 383 static void mux_chr_accept_input(CharDriverState *chr)
 384 {
 385     MuxDriver *d = chr->opaque;
 386     int m = d->focus;
 387
 388     while (d->prod[m] != d->cons[m] &&
 389            d->chr_can_read[m] &&
 390            d->chr_can_read[m](d->ext_opaque[m])) {
 391         d->chr_read[m](d->ext_opaque[m],
 392                        &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
 393     }
 394 }
 395
 396 static int mux_chr_can_read(void *opaque)
 397 {
 398     CharDriverState *chr = opaque;
 399     MuxDriver *d = chr->opaque;
 400     int m = d->focus;
 401
 402     if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
 403         return 1;
 404     if (d->chr_can_read[m])
 405         return d->chr_can_read[m](d->ext_opaque[m]);
 406     return 0;
 407 }
 408
 409 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
 410 {
 411     CharDriverState *chr = opaque;
 412     MuxDriver *d = chr->opaque;
 413     int m = d->focus;
 414     int i;
 415
 416     mux_chr_accept_input (opaque);
 417
 418     for(i = 0; i < size; i++)
 419         if (mux_proc_byte(chr, d, buf[i])) {
 420             if (d->prod[m] == d->cons[m] &&
 421                 d->chr_can_read[m] &&
 422                 d->chr_can_read[m](d->ext_opaque[m]))
 423                 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
 424             else
 425                 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
 426         }
 427 }
 428
 429 static void mux_chr_event(void *opaque, int event)
 430 {
 431     CharDriverState *chr = opaque;
 432     MuxDriver *d = chr->opaque;
 433     int i;
 434
 435     /* Send the event to all registered listeners */
 436     for (i = 0; i < d->mux_cnt; i++)
 437         mux_chr_send_event(d, i, event);
 438 }
 439
 440 static void mux_chr_update_read_handler(CharDriverState *chr)
 441 {
 442     MuxDriver *d = chr->opaque;
 443
 444     if (d->mux_cnt >= MAX_MUX) {
 445         fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
 446         return;
 447     }
 448     d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
 449     d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
 450     d->chr_read[d->mux_cnt] = chr->chr_read;
 451     d->chr_event[d->mux_cnt] = chr->chr_event;
 452     /* Fix up the real driver with mux routines */
 453     if (d->mux_cnt == 0) {
 454         qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
 455                               mux_chr_event, chr);
 456     }
 457     if (d->focus != -1) {
 458         mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
 459     }
 460     d->focus = d->mux_cnt;
 461     d->mux_cnt++;
 462     mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
 463 }
 464
 465 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
 466 {
 467     CharDriverState *chr;
 468     MuxDriver *d;
 469
 470     chr = qemu_mallocz(sizeof(CharDriverState));
 471     d = qemu_mallocz(sizeof(MuxDriver));
 472
 473     chr->opaque = d;
 474     d->drv = drv;
 475     d->focus = -1;
 476     chr->chr_write = mux_chr_write;
 477     chr->chr_update_read_handler = mux_chr_update_read_handler;
 478     chr->chr_accept_input = mux_chr_accept_input;
 479
 480     /* Muxes are always open on creation */
 481     qemu_chr_generic_open(chr);
 482
 483     return chr;
 484 }
 485
 486
 487 #ifdef _WIN32
 488 int send_all(int fd, const void *buf, int len1)
 489 {
 490     int ret, len;
 491
 492     len = len1;
 493     while (len > 0) {
 494         ret = send(fd, buf, len, 0);
 495         if (ret < 0) {
 496             errno = WSAGetLastError();
 497             if (errno != WSAEWOULDBLOCK) {
 498                 return -1;
 499             }
 500         } else if (ret == 0) {
 501             break;
 502         } else {
 503             buf += ret;
 504             len -= ret;
 505         }
 506     }
 507     return len1 - len;
 508 }
 509
 510 #else
 511
 512 int send_all(int fd, const void *_buf, int len1)
 513 {
 514     int ret, len;
 515     const uint8_t *buf = _buf;
 516
 517     len = len1;
 518     while (len > 0) {
 519         ret = write(fd, buf, len);
 520         if (ret < 0) {
 521             if (errno != EINTR && errno != EAGAIN)
 522                 return -1;
 523         } else if (ret == 0) {
 524             break;
 525         } else {
 526             buf += ret;
 527             len -= ret;
 528         }
 529     }
 530     return len1 - len;
 531 }
 532 #endif /* !_WIN32 */
 533
 534 #ifndef _WIN32
 535
 536 typedef struct {
 537     int fd_in, fd_out;
 538     int max_size;
 539 } FDCharDriver;
 540
 541 #define STDIO_MAX_CLIENTS 1
 542 static int stdio_nb_clients = 0;
 543
 544 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 545 {
 546     FDCharDriver *s = chr->opaque;
 547     return send_all(s->fd_out, buf, len);
 548 }
 549
 550 static int fd_chr_read_poll(void *opaque)
 551 {
 552     CharDriverState *chr = opaque;
 553     FDCharDriver *s = chr->opaque;
 554
 555     s->max_size = qemu_chr_can_read(chr);
 556     return s->max_size;
 557 }
 558
 559 static void fd_chr_read(void *opaque)
 560 {
 561     CharDriverState *chr = opaque;
 562     FDCharDriver *s = chr->opaque;
 563     int size, len;
 564     uint8_t buf[READ_BUF_LEN];
 565
 566     len = sizeof(buf);
 567     if (len > s->max_size)
 568         len = s->max_size;
 569     if (len == 0)
 570         return;
 571     size = read(s->fd_in, buf, len);
 572     if (size == 0) {
 573         /* FD has been closed. Remove it from the active list.  */
 574         qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
 575         qemu_chr_event(chr, CHR_EVENT_CLOSED);
 576         return;
 577     }
 578     if (size > 0) {
 579         qemu_chr_read(chr, buf, size);
 580     }
 581 }
 582
 583 static void fd_chr_update_read_handler(CharDriverState *chr)
 584 {
 585     FDCharDriver *s = chr->opaque;
 586
 587     if (s->fd_in >= 0) {
 588         if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
 589         } else {
 590             qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
 591                                  fd_chr_read, NULL, chr);
 592         }
 593     }
 594 }
 595
 596 static void fd_chr_close(struct CharDriverState *chr)
 597 {
 598     FDCharDriver *s = chr->opaque;
 599
 600     if (s->fd_in >= 0) {
 601         if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
 602         } else {
 603             qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
 604         }
 605     }
 606
 607     qemu_free(s);
 608     qemu_chr_event(chr, CHR_EVENT_CLOSED);
 609 }
 610
 611 /* open a character device to a unix fd */
 612 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
 613 {
 614     CharDriverState *chr;
 615     FDCharDriver *s;
 616
 617     chr = qemu_mallocz(sizeof(CharDriverState));
 618     s = qemu_mallocz(sizeof(FDCharDriver));
 619     s->fd_in = fd_in;
 620     s->fd_out = fd_out;
 621     chr->opaque = s;
 622     chr->chr_write = fd_chr_write;
 623     chr->chr_update_read_handler = fd_chr_update_read_handler;
 624     chr->chr_close = fd_chr_close;
 625
 626     qemu_chr_generic_open(chr);
 627
 628     return chr;
 629 }
 630
 631 static CharDriverState *qemu_chr_open_file_out(QemuOpts *opts)
 632 {
 633     int fd_out;
 634
 635     TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
 636                       O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
 637     if (fd_out < 0)
 638         return NULL;
 639     return qemu_chr_open_fd(-1, fd_out);
 640 }
 641
 642 static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts)
 643 {
 644     int fd_in, fd_out;
 645     char filename_in[256], filename_out[256];
 646     const char *filename = qemu_opt_get(opts, "path");
 647
 648     if (filename == NULL) {
 649         fprintf(stderr, "chardev: pipe: no filename given\n");
 650         return NULL;
 651     }
 652
 653     snprintf(filename_in, 256, "%s.in", filename);
 654     snprintf(filename_out, 256, "%s.out", filename);
 655     TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
 656     TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
 657     if (fd_in < 0 || fd_out < 0) {
 658         if (fd_in >= 0)
 659             close(fd_in);
 660         if (fd_out >= 0)
 661             close(fd_out);
 662         TFR(fd_in = fd_out = open(filename, O_RDWR | O_BINARY));
 663         if (fd_in < 0)
 664             return NULL;
 665     }
 666     return qemu_chr_open_fd(fd_in, fd_out);
 667 }
 668
 669
 670 /* for STDIO, we handle the case where several clients use it
 671    (nographic mode) */
 672
 673 #define TERM_FIFO_MAX_SIZE 1
 674
 675 static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
 676 static int term_fifo_size;
 677
 678 static int stdio_read_poll(void *opaque)
 679 {
 680     CharDriverState *chr = opaque;
 681
 682     /* try to flush the queue if needed */
 683     if (term_fifo_size != 0 && qemu_chr_can_read(chr) > 0) {
 684         qemu_chr_read(chr, term_fifo, 1);
 685         term_fifo_size = 0;
 686     }
 687     /* see if we can absorb more chars */
 688     if (term_fifo_size == 0)
 689         return 1;
 690     else
 691         return 0;
 692 }
 693
 694 static void stdio_read(void *opaque)
 695 {
 696     int size;
 697     uint8_t buf[1];
 698     CharDriverState *chr = opaque;
 699
 700     size = read(0, buf, 1);
 701     if (size == 0) {
 702         /* stdin has been closed. Remove it from the active list.  */
 703         qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
 704         qemu_chr_event(chr, CHR_EVENT_CLOSED);
 705         return;
 706     }
 707     if (size > 0) {
 708         if (qemu_chr_can_read(chr) > 0) {
 709             qemu_chr_read(chr, buf, 1);
 710         } else if (term_fifo_size == 0) {
 711             term_fifo[term_fifo_size++] = buf[0];
 712         }
 713     }
 714 }
 715
 716 /* init terminal so that we can grab keys */
 717 static struct termios oldtty;
 718 static int old_fd0_flags;
 719
 720 static void term_exit(void)
 721 {
 722     tcsetattr (0, TCSANOW, &oldtty);
 723     fcntl(0, F_SETFL, old_fd0_flags);
 724 }
 725
 726 static void term_init(QemuOpts *opts)
 727 {
 728     struct termios tty;
 729
 730     tty = oldtty;
 731     tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
 732                           |INLCR|IGNCR|ICRNL|IXON);
 733     tty.c_oflag |= OPOST;
 734     tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
 735     /* if graphical mode, we allow Ctrl-C handling */
 736     if (!qemu_opt_get_bool(opts, "signal", display_type != DT_NOGRAPHIC))
 737         tty.c_lflag &= ~ISIG;
 738     tty.c_cflag &= ~(CSIZE|PARENB);
 739     tty.c_cflag |= CS8;
 740     tty.c_cc[VMIN] = 1;
 741     tty.c_cc[VTIME] = 0;
 742
 743     tcsetattr (0, TCSANOW, &tty);
 744 }
 745
 746 static void qemu_chr_close_stdio(struct CharDriverState *chr)
 747 {
 748     term_exit();
 749     stdio_nb_clients--;
 750     qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
 751     fd_chr_close(chr);
 752 }
 753
 754 static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts)
 755 {
 756     CharDriverState *chr;
 757
 758     if (stdio_nb_clients >= STDIO_MAX_CLIENTS)
 759         return NULL;
 760     if (stdio_nb_clients == 0) {
 761         old_fd0_flags = fcntl(0, F_GETFL);
 762         tcgetattr (0, &oldtty);
 763         fcntl(0, F_SETFL, O_NONBLOCK);
 764         atexit(term_exit);
 765     }
 766
 767     chr = qemu_chr_open_fd(0, 1);
 768     chr->chr_close = qemu_chr_close_stdio;
 769     qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
 770     stdio_nb_clients++;
 771     term_init(opts);
 772
 773     return chr;
 774 }
 775
 776 #ifdef __sun__
 777 /* Once Solaris has openpty(), this is going to be removed. */
 778 static int openpty(int *amaster, int *aslave, char *name,
 779                    struct termios *termp, struct winsize *winp)
 780 {
 781         const char *slave;
 782         int mfd = -1, sfd = -1;
 783
 784         *amaster = *aslave = -1;
 785
 786         mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
 787         if (mfd < 0)
 788                 goto err;
 789
 790         if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
 791                 goto err;
 792
 793         if ((slave = ptsname(mfd)) == NULL)
 794                 goto err;
 795
 796         if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
 797                 goto err;
 798
 799         if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
 800             (termp != NULL && tcgetattr(sfd, termp) < 0))
 801                 goto err;
 802
 803         if (amaster)
 804                 *amaster = mfd;
 805         if (aslave)
 806                 *aslave = sfd;
 807         if (winp)
 808                 ioctl(sfd, TIOCSWINSZ, winp);
 809
 810         return 0;
 811
 812 err:
 813         if (sfd != -1)
 814                 close(sfd);
 815         close(mfd);
 816         return -1;
 817 }
 818
 819 static void cfmakeraw (struct termios *termios_p)
 820 {
 821         termios_p->c_iflag &=
 822                 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
 823         termios_p->c_oflag &= ~OPOST;
 824         termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
 825         termios_p->c_cflag &= ~(CSIZE|PARENB);
 826         termios_p->c_cflag |= CS8;
 827
 828         termios_p->c_cc[VMIN] = 0;
 829         termios_p->c_cc[VTIME] = 0;
 830 }
 831 #endif
 832
 833 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
 834     || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
 835     || defined(__GLIBC__)
 836
 837 typedef struct {
 838     int fd;
 839     int connected;
 840     int polling;
 841     int read_bytes;
 842     QEMUTimer *timer;
 843 } PtyCharDriver;
 844
 845 static void pty_chr_update_read_handler(CharDriverState *chr);
 846 static void pty_chr_state(CharDriverState *chr, int connected);
 847
 848 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 849 {
 850     PtyCharDriver *s = chr->opaque;
 851
 852     if (!s->connected) {
 853         /* guest sends data, check for (re-)connect */
 854         pty_chr_update_read_handler(chr);
 855         return 0;
 856     }
 857     return send_all(s->fd, buf, len);
 858 }
 859
 860 static int pty_chr_read_poll(void *opaque)
 861 {
 862     CharDriverState *chr = opaque;
 863     PtyCharDriver *s = chr->opaque;
 864
 865     s->read_bytes = qemu_chr_can_read(chr);
 866     return s->read_bytes;
 867 }
 868
 869 static void pty_chr_read(void *opaque)
 870 {
 871     CharDriverState *chr = opaque;
 872     PtyCharDriver *s = chr->opaque;
 873     int size, len;
 874     uint8_t buf[READ_BUF_LEN];
 875
 876     len = sizeof(buf);
 877     if (len > s->read_bytes)
 878         len = s->read_bytes;
 879     if (len == 0)
 880         return;
 881     size = read(s->fd, buf, len);
 882     if ((size == -1 && errno == EIO) ||
 883         (size == 0)) {
 884         pty_chr_state(chr, 0);
 885         return;
 886     }
 887     if (size > 0) {
 888         pty_chr_state(chr, 1);
 889         qemu_chr_read(chr, buf, size);
 890     }
 891 }
 892
 893 static void pty_chr_update_read_handler(CharDriverState *chr)
 894 {
 895     PtyCharDriver *s = chr->opaque;
 896
 897     qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
 898                          pty_chr_read, NULL, chr);
 899     s->polling = 1;
 900     /*
 901      * Short timeout here: just need wait long enougth that qemu makes
 902      * it through the poll loop once.  When reconnected we want a
 903      * short timeout so we notice it almost instantly.  Otherwise
 904      * read() gives us -EIO instantly, making pty_chr_state() reset the
 905      * timeout to the normal (much longer) poll interval before the
 906      * timer triggers.
 907      */
 908     qemu_mod_timer(s->timer, qemu_get_clock(rt_clock) + 10);
 909 }
 910
 911 static void pty_chr_state(CharDriverState *chr, int connected)
 912 {
 913     PtyCharDriver *s = chr->opaque;
 914
 915     if (!connected) {
 916         qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
 917         s->connected = 0;
 918         s->polling = 0;
 919         /* (re-)connect poll interval for idle guests: once per second.
 920          * We check more frequently in case the guests sends data to
 921          * the virtual device linked to our pty. */
 922         qemu_mod_timer(s->timer, qemu_get_clock(rt_clock) + 1000);
 923     } else {
 924         if (!s->connected)
 925             qemu_chr_generic_open(chr);
 926         s->connected = 1;
 927     }
 928 }
 929
 930 static void pty_chr_timer(void *opaque)
 931 {
 932     struct CharDriverState *chr = opaque;
 933     PtyCharDriver *s = chr->opaque;
 934
 935     if (s->connected)
 936         return;
 937     if (s->polling) {
 938         /* If we arrive here without polling being cleared due
 939          * read returning -EIO, then we are (re-)connected */
 940         pty_chr_state(chr, 1);
 941         return;
 942     }
 943
 944     /* Next poll ... */
 945     pty_chr_update_read_handler(chr);
 946 }
 947
 948 static void pty_chr_close(struct CharDriverState *chr)
 949 {
 950     PtyCharDriver *s = chr->opaque;
 951
 952     qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
 953     close(s->fd);
 954     qemu_del_timer(s->timer);
 955     qemu_free_timer(s->timer);
 956     qemu_free(s);
 957     qemu_chr_event(chr, CHR_EVENT_CLOSED);
 958 }
 959
 960 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
 961 {
 962     CharDriverState *chr;
 963     PtyCharDriver *s;
 964     struct termios tty;
 965     int slave_fd, len;
 966 #if defined(__OpenBSD__) || defined(__DragonFly__)
 967     char pty_name[PATH_MAX];
 968 #define q_ptsname(x) pty_name
 969 #else
 970     char *pty_name = NULL;
 971 #define q_ptsname(x) ptsname(x)
 972 #endif
 973
 974     chr = qemu_mallocz(sizeof(CharDriverState));
 975     s = qemu_mallocz(sizeof(PtyCharDriver));
 976
 977     if (openpty(&s->fd, &slave_fd, pty_name, NULL, NULL) < 0) {
 978         return NULL;
 979     }
 980
 981     /* Set raw attributes on the pty. */
 982     tcgetattr(slave_fd, &tty);
 983     cfmakeraw(&tty);
 984     tcsetattr(slave_fd, TCSAFLUSH, &tty);
 985     close(slave_fd);
 986
 987     len = strlen(q_ptsname(s->fd)) + 5;
 988     chr->filename = qemu_malloc(len);
 989     snprintf(chr->filename, len, "pty:%s", q_ptsname(s->fd));
 990     qemu_opt_set(opts, "path", q_ptsname(s->fd));
 991     fprintf(stderr, "char device redirected to %s\n", q_ptsname(s->fd));
 992
 993     chr->opaque = s;
 994     chr->chr_write = pty_chr_write;
 995     chr->chr_update_read_handler = pty_chr_update_read_handler;
 996     chr->chr_close = pty_chr_close;
 997
 998     s->timer = qemu_new_timer(rt_clock, pty_chr_timer, chr);
 999
1000     return chr;
1001 }
1002
1003 static void tty_serial_init(int fd, int speed,
1004                             int parity, int data_bits, int stop_bits)
1005 {
1006     struct termios tty;
1007     speed_t spd;
1008
1009 #if 0
1010     printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1011            speed, parity, data_bits, stop_bits);
1012 #endif
1013     tcgetattr (fd, &tty);
1014
1015 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1016     speed = speed * 10 / 11;
1017     do {
1018         check_speed(50);
1019         check_speed(75);
1020         check_speed(110);
1021         check_speed(134);
1022         check_speed(150);
1023         check_speed(200);
1024         check_speed(300);
1025         check_speed(600);
1026         check_speed(1200);
1027         check_speed(1800);
1028         check_speed(2400);
1029         check_speed(4800);
1030         check_speed(9600);
1031         check_speed(19200);
1032         check_speed(38400);
1033         /* Non-Posix values follow. They may be unsupported on some systems. */
1034         check_speed(57600);
1035         check_speed(115200);
1036 #ifdef B230400
1037         check_speed(230400);
1038 #endif
1039 #ifdef B460800
1040         check_speed(460800);
1041 #endif
1042 #ifdef B500000
1043         check_speed(500000);
1044 #endif
1045 #ifdef B576000
1046         check_speed(576000);
1047 #endif
1048 #ifdef B921600
1049         check_speed(921600);
1050 #endif
1051 #ifdef B1000000
1052         check_speed(1000000);
1053 #endif
1054 #ifdef B1152000
1055         check_speed(1152000);
1056 #endif
1057 #ifdef B1500000
1058         check_speed(1500000);
1059 #endif
1060 #ifdef B2000000
1061         check_speed(2000000);
1062 #endif
1063 #ifdef B2500000
1064         check_speed(2500000);
1065 #endif
1066 #ifdef B3000000
1067         check_speed(3000000);
1068 #endif
1069 #ifdef B3500000
1070         check_speed(3500000);
1071 #endif
1072 #ifdef B4000000
1073         check_speed(4000000);
1074 #endif
1075         spd = B115200;
1076     } while (0);
1077
1078     cfsetispeed(&tty, spd);
1079     cfsetospeed(&tty, spd);
1080
1081     tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1082                           |INLCR|IGNCR|ICRNL|IXON);
1083     tty.c_oflag |= OPOST;
1084     tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1085     tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1086     switch(data_bits) {
1087     default:
1088     case 8:
1089         tty.c_cflag |= CS8;
1090         break;
1091     case 7:
1092         tty.c_cflag |= CS7;
1093         break;
1094     case 6:
1095         tty.c_cflag |= CS6;
1096         break;
1097     case 5:
1098         tty.c_cflag |= CS5;
1099         break;
1100     }
1101     switch(parity) {
1102     default:
1103     case 'N':
1104         break;
1105     case 'E':
1106         tty.c_cflag |= PARENB;
1107         break;
1108     case 'O':
1109         tty.c_cflag |= PARENB | PARODD;
1110         break;
1111     }
1112     if (stop_bits == 2)
1113         tty.c_cflag |= CSTOPB;
1114
1115     tcsetattr (fd, TCSANOW, &tty);
1116 }
1117
1118 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1119 {
1120     FDCharDriver *s = chr->opaque;
1121
1122     switch(cmd) {
1123     case CHR_IOCTL_SERIAL_SET_PARAMS:
1124         {
1125             QEMUSerialSetParams *ssp = arg;
1126             tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1127                             ssp->data_bits, ssp->stop_bits);
1128         }
1129         break;
1130     case CHR_IOCTL_SERIAL_SET_BREAK:
1131         {
1132             int enable = *(int *)arg;
1133             if (enable)
1134                 tcsendbreak(s->fd_in, 1);
1135         }
1136         break;
1137     case CHR_IOCTL_SERIAL_GET_TIOCM:
1138         {
1139             int sarg = 0;
1140             int *targ = (int *)arg;
1141             ioctl(s->fd_in, TIOCMGET, &sarg);
1142             *targ = 0;
1143             if (sarg & TIOCM_CTS)
1144                 *targ |= CHR_TIOCM_CTS;
1145             if (sarg & TIOCM_CAR)
1146                 *targ |= CHR_TIOCM_CAR;
1147             if (sarg & TIOCM_DSR)
1148                 *targ |= CHR_TIOCM_DSR;
1149             if (sarg & TIOCM_RI)
1150                 *targ |= CHR_TIOCM_RI;
1151             if (sarg & TIOCM_DTR)
1152                 *targ |= CHR_TIOCM_DTR;
1153             if (sarg & TIOCM_RTS)
1154                 *targ |= CHR_TIOCM_RTS;
1155         }
1156         break;
1157     case CHR_IOCTL_SERIAL_SET_TIOCM:
1158         {
1159             int sarg = *(int *)arg;
1160             int targ = 0;
1161             ioctl(s->fd_in, TIOCMGET, &targ);
1162             targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1163                      | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1164             if (sarg & CHR_TIOCM_CTS)
1165                 targ |= TIOCM_CTS;
1166             if (sarg & CHR_TIOCM_CAR)
1167                 targ |= TIOCM_CAR;
1168             if (sarg & CHR_TIOCM_DSR)
1169                 targ |= TIOCM_DSR;
1170             if (sarg & CHR_TIOCM_RI)
1171                 targ |= TIOCM_RI;
1172             if (sarg & CHR_TIOCM_DTR)
1173                 targ |= TIOCM_DTR;
1174             if (sarg & CHR_TIOCM_RTS)
1175                 targ |= TIOCM_RTS;
1176             ioctl(s->fd_in, TIOCMSET, &targ);
1177         }
1178         break;
1179     default:
1180         return -ENOTSUP;
1181     }
1182     return 0;
1183 }
1184
1185 static void qemu_chr_close_tty(CharDriverState *chr)
1186 {
1187     FDCharDriver *s = chr->opaque;
1188     int fd = -1;
1189
1190     if (s) {
1191         fd = s->fd_in;
1192     }
1193
1194     fd_chr_close(chr);
1195
1196     if (fd >= 0) {
1197         close(fd);
1198     }
1199 }
1200
1201 static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
1202 {
1203     const char *filename = qemu_opt_get(opts, "path");
1204     CharDriverState *chr;
1205     int fd;
1206
1207     TFR(fd = open(filename, O_RDWR | O_NONBLOCK));
1208     if (fd < 0) {
1209         return NULL;
1210     }
1211     tty_serial_init(fd, 115200, 'N', 8, 1);
1212     chr = qemu_chr_open_fd(fd, fd);
1213     if (!chr) {
1214         close(fd);
1215         return NULL;
1216     }
1217     chr->chr_ioctl = tty_serial_ioctl;
1218     chr->chr_close = qemu_chr_close_tty;
1219     return chr;
1220 }
1221 #else  /* ! __linux__ && ! __sun__ */
1222 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
1223 {
1224     return NULL;
1225 }
1226 #endif /* __linux__ || __sun__ */
1227
1228 #if defined(__linux__)
1229 typedef struct {
1230     int fd;
1231     int mode;
1232 } ParallelCharDriver;
1233
1234 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1235 {
1236     if (s->mode != mode) {
1237         int m = mode;
1238         if (ioctl(s->fd, PPSETMODE, &m) < 0)
1239             return 0;
1240         s->mode = mode;
1241     }
1242     return 1;
1243 }
1244
1245 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1246 {
1247     ParallelCharDriver *drv = chr->opaque;
1248     int fd = drv->fd;
1249     uint8_t b;
1250
1251     switch(cmd) {
1252     case CHR_IOCTL_PP_READ_DATA:
1253         if (ioctl(fd, PPRDATA, &b) < 0)
1254             return -ENOTSUP;
1255         *(uint8_t *)arg = b;
1256         break;
1257     case CHR_IOCTL_PP_WRITE_DATA:
1258         b = *(uint8_t *)arg;
1259         if (ioctl(fd, PPWDATA, &b) < 0)
1260             return -ENOTSUP;
1261         break;
1262     case CHR_IOCTL_PP_READ_CONTROL:
1263         if (ioctl(fd, PPRCONTROL, &b) < 0)
1264             return -ENOTSUP;
1265         /* Linux gives only the lowest bits, and no way to know data
1266            direction! For better compatibility set the fixed upper
1267            bits. */
1268         *(uint8_t *)arg = b | 0xc0;
1269         break;
1270     case CHR_IOCTL_PP_WRITE_CONTROL:
1271         b = *(uint8_t *)arg;
1272         if (ioctl(fd, PPWCONTROL, &b) < 0)
1273             return -ENOTSUP;
1274         break;
1275     case CHR_IOCTL_PP_READ_STATUS:
1276         if (ioctl(fd, PPRSTATUS, &b) < 0)
1277             return -ENOTSUP;
1278         *(uint8_t *)arg = b;
1279         break;
1280     case CHR_IOCTL_PP_DATA_DIR:
1281         if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1282             return -ENOTSUP;
1283         break;
1284     case CHR_IOCTL_PP_EPP_READ_ADDR:
1285         if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1286             struct ParallelIOArg *parg = arg;
1287             int n = read(fd, parg->buffer, parg->count);
1288             if (n != parg->count) {
1289                 return -EIO;
1290             }
1291         }
1292         break;
1293     case CHR_IOCTL_PP_EPP_READ:
1294         if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1295             struct ParallelIOArg *parg = arg;
1296             int n = read(fd, parg->buffer, parg->count);
1297             if (n != parg->count) {
1298                 return -EIO;
1299             }
1300         }
1301         break;
1302     case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1303         if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1304             struct ParallelIOArg *parg = arg;
1305             int n = write(fd, parg->buffer, parg->count);
1306             if (n != parg->count) {
1307                 return -EIO;
1308             }
1309         }
1310         break;
1311     case CHR_IOCTL_PP_EPP_WRITE:
1312         if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1313             struct ParallelIOArg *parg = arg;
1314             int n = write(fd, parg->buffer, parg->count);
1315             if (n != parg->count) {
1316                 return -EIO;
1317             }
1318         }
1319         break;
1320     default:
1321         return -ENOTSUP;
1322     }
1323     return 0;
1324 }
1325
1326 static void pp_close(CharDriverState *chr)
1327 {
1328     ParallelCharDriver *drv = chr->opaque;
1329     int fd = drv->fd;
1330
1331     pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1332     ioctl(fd, PPRELEASE);
1333     close(fd);
1334     qemu_free(drv);
1335     qemu_chr_event(chr, CHR_EVENT_CLOSED);
1336 }
1337
1338 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1339 {
1340     const char *filename = qemu_opt_get(opts, "path");
1341     CharDriverState *chr;
1342     ParallelCharDriver *drv;
1343     int fd;
1344
1345     TFR(fd = open(filename, O_RDWR));
1346     if (fd < 0)
1347         return NULL;
1348
1349     if (ioctl(fd, PPCLAIM) < 0) {
1350         close(fd);
1351         return NULL;
1352     }
1353
1354     drv = qemu_mallocz(sizeof(ParallelCharDriver));
1355     drv->fd = fd;
1356     drv->mode = IEEE1284_MODE_COMPAT;
1357
1358     chr = qemu_mallocz(sizeof(CharDriverState));
1359     chr->chr_write = null_chr_write;
1360     chr->chr_ioctl = pp_ioctl;
1361     chr->chr_close = pp_close;
1362     chr->opaque = drv;
1363
1364     qemu_chr_generic_open(chr);
1365
1366     return chr;
1367 }
1368 #endif /* __linux__ */
1369
1370 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1371 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1372 {
1373     int fd = (int)(long)chr->opaque;
1374     uint8_t b;
1375
1376     switch(cmd) {
1377     case CHR_IOCTL_PP_READ_DATA:
1378         if (ioctl(fd, PPIGDATA, &b) < 0)
1379             return -ENOTSUP;
1380         *(uint8_t *)arg = b;
1381         break;
1382     case CHR_IOCTL_PP_WRITE_DATA:
1383         b = *(uint8_t *)arg;
1384         if (ioctl(fd, PPISDATA, &b) < 0)
1385             return -ENOTSUP;
1386         break;
1387     case CHR_IOCTL_PP_READ_CONTROL:
1388         if (ioctl(fd, PPIGCTRL, &b) < 0)
1389             return -ENOTSUP;
1390         *(uint8_t *)arg = b;
1391         break;
1392     case CHR_IOCTL_PP_WRITE_CONTROL:
1393         b = *(uint8_t *)arg;
1394         if (ioctl(fd, PPISCTRL, &b) < 0)
1395             return -ENOTSUP;
1396         break;
1397     case CHR_IOCTL_PP_READ_STATUS:
1398         if (ioctl(fd, PPIGSTATUS, &b) < 0)
1399             return -ENOTSUP;
1400         *(uint8_t *)arg = b;
1401         break;
1402     default:
1403         return -ENOTSUP;
1404     }
1405     return 0;
1406 }
1407
1408 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1409 {
1410     const char *filename = qemu_opt_get(opts, "path");
1411     CharDriverState *chr;
1412     int fd;
1413
1414     fd = open(filename, O_RDWR);
1415     if (fd < 0)
1416         return NULL;
1417
1418     chr = qemu_mallocz(sizeof(CharDriverState));
1419     chr->opaque = (void *)(long)fd;
1420     chr->chr_write = null_chr_write;
1421     chr->chr_ioctl = pp_ioctl;
1422     return chr;
1423 }
1424 #endif
1425
1426 #else /* _WIN32 */
1427
1428 typedef struct {
1429     int max_size;
1430     HANDLE hcom, hrecv, hsend;
1431     OVERLAPPED orecv, osend;
1432     BOOL fpipe;
1433     DWORD len;
1434 } WinCharState;
1435
1436 #define NSENDBUF 2048
1437 #define NRECVBUF 2048
1438 #define MAXCONNECT 1
1439 #define NTIMEOUT 5000
1440
1441 static int win_chr_poll(void *opaque);
1442 static int win_chr_pipe_poll(void *opaque);
1443
1444 static void win_chr_close(CharDriverState *chr)
1445 {
1446     WinCharState *s = chr->opaque;
1447
1448     if (s->hsend) {
1449         CloseHandle(s->hsend);
1450         s->hsend = NULL;
1451     }
1452     if (s->hrecv) {
1453         CloseHandle(s->hrecv);
1454         s->hrecv = NULL;
1455     }
1456     if (s->hcom) {
1457         CloseHandle(s->hcom);
1458         s->hcom = NULL;
1459     }
1460     if (s->fpipe)
1461         qemu_del_polling_cb(win_chr_pipe_poll, chr);
1462     else
1463         qemu_del_polling_cb(win_chr_poll, chr);
1464
1465     qemu_chr_event(chr, CHR_EVENT_CLOSED);
1466 }
1467
1468 static int win_chr_init(CharDriverState *chr, const char *filename)
1469 {
1470     WinCharState *s = chr->opaque;
1471     COMMCONFIG comcfg;
1472     COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1473     COMSTAT comstat;
1474     DWORD size;
1475     DWORD err;
1476
1477     s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1478     if (!s->hsend) {
1479         fprintf(stderr, "Failed CreateEvent\n");
1480         goto fail;
1481     }
1482     s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1483     if (!s->hrecv) {
1484         fprintf(stderr, "Failed CreateEvent\n");
1485         goto fail;
1486     }
1487
1488     s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1489                       OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1490     if (s->hcom == INVALID_HANDLE_VALUE) {
1491         fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1492         s->hcom = NULL;
1493         goto fail;
1494     }
1495
1496     if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1497         fprintf(stderr, "Failed SetupComm\n");
1498         goto fail;
1499     }
1500
1501     ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1502     size = sizeof(COMMCONFIG);
1503     GetDefaultCommConfig(filename, &comcfg, &size);
1504     comcfg.dcb.DCBlength = sizeof(DCB);
1505     CommConfigDialog(filename, NULL, &comcfg);
1506
1507     if (!SetCommState(s->hcom, &comcfg.dcb)) {
1508         fprintf(stderr, "Failed SetCommState\n");
1509         goto fail;
1510     }
1511
1512     if (!SetCommMask(s->hcom, EV_ERR)) {
1513         fprintf(stderr, "Failed SetCommMask\n");
1514         goto fail;
1515     }
1516
1517     cto.ReadIntervalTimeout = MAXDWORD;
1518     if (!SetCommTimeouts(s->hcom, &cto)) {
1519         fprintf(stderr, "Failed SetCommTimeouts\n");
1520         goto fail;
1521     }
1522
1523     if (!ClearCommError(s->hcom, &err, &comstat)) {
1524         fprintf(stderr, "Failed ClearCommError\n");
1525         goto fail;
1526     }
1527     qemu_add_polling_cb(win_chr_poll, chr);
1528     return 0;
1529
1530  fail:
1531     win_chr_close(chr);
1532     return -1;
1533 }
1534
1535 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1536 {
1537     WinCharState *s = chr->opaque;
1538     DWORD len, ret, size, err;
1539
1540     len = len1;
1541     ZeroMemory(&s->osend, sizeof(s->osend));
1542     s->osend.hEvent = s->hsend;
1543     while (len > 0) {
1544         if (s->hsend)
1545             ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1546         else
1547             ret = WriteFile(s->hcom, buf, len, &size, NULL);
1548         if (!ret) {
1549             err = GetLastError();
1550             if (err == ERROR_IO_PENDING) {
1551                 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1552                 if (ret) {
1553                     buf += size;
1554                     len -= size;
1555                 } else {
1556                     break;
1557                 }
1558             } else {
1559                 break;
1560             }
1561         } else {
1562             buf += size;
1563             len -= size;
1564         }
1565     }
1566     return len1 - len;
1567 }
1568
1569 static int win_chr_read_poll(CharDriverState *chr)
1570 {
1571     WinCharState *s = chr->opaque;
1572
1573     s->max_size = qemu_chr_can_read(chr);
1574     return s->max_size;
1575 }
1576
1577 static void win_chr_readfile(CharDriverState *chr)
1578 {
1579     WinCharState *s = chr->opaque;
1580     int ret, err;
1581     uint8_t buf[READ_BUF_LEN];
1582     DWORD size;
1583
1584     ZeroMemory(&s->orecv, sizeof(s->orecv));
1585     s->orecv.hEvent = s->hrecv;
1586     ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1587     if (!ret) {
1588         err = GetLastError();
1589         if (err == ERROR_IO_PENDING) {
1590             ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1591         }
1592     }
1593
1594     if (size > 0) {
1595         qemu_chr_read(chr, buf, size);
1596     }
1597 }
1598
1599 static void win_chr_read(CharDriverState *chr)
1600 {
1601     WinCharState *s = chr->opaque;
1602
1603     if (s->len > s->max_size)
1604         s->len = s->max_size;
1605     if (s->len == 0)
1606         return;
1607
1608     win_chr_readfile(chr);
1609 }
1610
1611 static int win_chr_poll(void *opaque)
1612 {
1613     CharDriverState *chr = opaque;
1614     WinCharState *s = chr->opaque;
1615     COMSTAT status;
1616     DWORD comerr;
1617
1618     ClearCommError(s->hcom, &comerr, &status);
1619     if (status.cbInQue > 0) {
1620         s->len = status.cbInQue;
1621         win_chr_read_poll(chr);
1622         win_chr_read(chr);
1623         return 1;
1624     }
1625     return 0;
1626 }
1627
1628 static CharDriverState *qemu_chr_open_win(QemuOpts *opts)
1629 {
1630     const char *filename = qemu_opt_get(opts, "path");
1631     CharDriverState *chr;
1632     WinCharState *s;
1633
1634     chr = qemu_mallocz(sizeof(CharDriverState));
1635     s = qemu_mallocz(sizeof(WinCharState));
1636     chr->opaque = s;
1637     chr->chr_write = win_chr_write;
1638     chr->chr_close = win_chr_close;
1639
1640     if (win_chr_init(chr, filename) < 0) {
1641         free(s);
1642         free(chr);
1643         return NULL;
1644     }
1645     qemu_chr_generic_open(chr);
1646     return chr;
1647 }
1648
1649 static int win_chr_pipe_poll(void *opaque)
1650 {
1651     CharDriverState *chr = opaque;
1652     WinCharState *s = chr->opaque;
1653     DWORD size;
1654
1655     PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1656     if (size > 0) {
1657         s->len = size;
1658         win_chr_read_poll(chr);
1659         win_chr_read(chr);
1660         return 1;
1661     }
1662     return 0;
1663 }
1664
1665 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1666 {
1667     WinCharState *s = chr->opaque;
1668     OVERLAPPED ov;
1669     int ret;
1670     DWORD size;
1671     char openname[256];
1672
1673     s->fpipe = TRUE;
1674
1675     s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1676     if (!s->hsend) {
1677         fprintf(stderr, "Failed CreateEvent\n");
1678         goto fail;
1679     }
1680     s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1681     if (!s->hrecv) {
1682         fprintf(stderr, "Failed CreateEvent\n");
1683         goto fail;
1684     }
1685
1686     snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1687     s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1688                               PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1689                               PIPE_WAIT,
1690                               MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1691     if (s->hcom == INVALID_HANDLE_VALUE) {
1692         fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1693         s->hcom = NULL;
1694         goto fail;
1695     }
1696
1697     ZeroMemory(&ov, sizeof(ov));
1698     ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1699     ret = ConnectNamedPipe(s->hcom, &ov);
1700     if (ret) {
1701         fprintf(stderr, "Failed ConnectNamedPipe\n");
1702         goto fail;
1703     }
1704
1705     ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1706     if (!ret) {
1707         fprintf(stderr, "Failed GetOverlappedResult\n");
1708         if (ov.hEvent) {
1709             CloseHandle(ov.hEvent);
1710             ov.hEvent = NULL;
1711         }
1712         goto fail;
1713     }
1714
1715     if (ov.hEvent) {
1716         CloseHandle(ov.hEvent);
1717         ov.hEvent = NULL;
1718     }
1719     qemu_add_polling_cb(win_chr_pipe_poll, chr);
1720     return 0;
1721
1722  fail:
1723     win_chr_close(chr);
1724     return -1;
1725 }
1726
1727
1728 static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts)
1729 {
1730     const char *filename = qemu_opt_get(opts, "path");
1731     CharDriverState *chr;
1732     WinCharState *s;
1733
1734     chr = qemu_mallocz(sizeof(CharDriverState));
1735     s = qemu_mallocz(sizeof(WinCharState));
1736     chr->opaque = s;
1737     chr->chr_write = win_chr_write;
1738     chr->chr_close = win_chr_close;
1739
1740     if (win_chr_pipe_init(chr, filename) < 0) {
1741         free(s);
1742         free(chr);
1743         return NULL;
1744     }
1745     qemu_chr_generic_open(chr);
1746     return chr;
1747 }
1748
1749 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1750 {
1751     CharDriverState *chr;
1752     WinCharState *s;
1753
1754     chr = qemu_mallocz(sizeof(CharDriverState));
1755     s = qemu_mallocz(sizeof(WinCharState));
1756     s->hcom = fd_out;
1757     chr->opaque = s;
1758     chr->chr_write = win_chr_write;
1759     qemu_chr_generic_open(chr);
1760     return chr;
1761 }
1762
1763 static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts)
1764 {
1765     return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1766 }
1767
1768 static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts)
1769 {
1770     const char *file_out = qemu_opt_get(opts, "path");
1771     HANDLE fd_out;
1772
1773     fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1774                         OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1775     if (fd_out == INVALID_HANDLE_VALUE)
1776         return NULL;
1777
1778     return qemu_chr_open_win_file(fd_out);
1779 }
1780 #endif /* !_WIN32 */
1781
1782 /***********************************************************/
1783 /* UDP Net console */
1784
1785 typedef struct {
1786     int fd;
1787     uint8_t buf[READ_BUF_LEN];
1788     int bufcnt;
1789     int bufptr;
1790     int max_size;
1791 } NetCharDriver;
1792
1793 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1794 {
1795     NetCharDriver *s = chr->opaque;
1796
1797     return send(s->fd, (const void *)buf, len, 0);
1798 }
1799
1800 static int udp_chr_read_poll(void *opaque)
1801 {
1802     CharDriverState *chr = opaque;
1803     NetCharDriver *s = chr->opaque;
1804
1805     s->max_size = qemu_chr_can_read(chr);
1806
1807     /* If there were any stray characters in the queue process them
1808      * first
1809      */
1810     while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1811         qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1812         s->bufptr++;
1813         s->max_size = qemu_chr_can_read(chr);
1814     }
1815     return s->max_size;
1816 }
1817
1818 static void udp_chr_read(void *opaque)
1819 {
1820     CharDriverState *chr = opaque;
1821     NetCharDriver *s = chr->opaque;
1822
1823     if (s->max_size == 0)
1824         return;
1825     s->bufcnt = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1826     s->bufptr = s->bufcnt;
1827     if (s->bufcnt <= 0)
1828         return;
1829
1830     s->bufptr = 0;
1831     while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1832         qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1833         s->bufptr++;
1834         s->max_size = qemu_chr_can_read(chr);
1835     }
1836 }
1837
1838 static void udp_chr_update_read_handler(CharDriverState *chr)
1839 {
1840     NetCharDriver *s = chr->opaque;
1841
1842     if (s->fd >= 0) {
1843         qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
1844                              udp_chr_read, NULL, chr);
1845     }
1846 }
1847
1848 static void udp_chr_close(CharDriverState *chr)
1849 {
1850     NetCharDriver *s = chr->opaque;
1851     if (s->fd >= 0) {
1852         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1853         closesocket(s->fd);
1854     }
1855     qemu_free(s);
1856     qemu_chr_event(chr, CHR_EVENT_CLOSED);
1857 }
1858
1859 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
1860 {
1861     CharDriverState *chr = NULL;
1862     NetCharDriver *s = NULL;
1863     int fd = -1;
1864
1865     chr = qemu_mallocz(sizeof(CharDriverState));
1866     s = qemu_mallocz(sizeof(NetCharDriver));
1867
1868     fd = inet_dgram_opts(opts);
1869     if (fd < 0) {
1870         fprintf(stderr, "inet_dgram_opts failed\n");
1871         goto return_err;
1872     }
1873
1874     s->fd = fd;
1875     s->bufcnt = 0;
1876     s->bufptr = 0;
1877     chr->opaque = s;
1878     chr->chr_write = udp_chr_write;
1879     chr->chr_update_read_handler = udp_chr_update_read_handler;
1880     chr->chr_close = udp_chr_close;
1881     return chr;
1882
1883 return_err:
1884     if (chr)
1885         free(chr);
1886     if (s)
1887         free(s);
1888     if (fd >= 0)
1889         closesocket(fd);
1890     return NULL;
1891 }
1892
1893 /***********************************************************/
1894 /* TCP Net console */
1895
1896 typedef struct {
1897     int fd, listen_fd;
1898     int connected;
1899     int max_size;
1900     int do_telnetopt;
1901     int do_nodelay;
1902     int is_unix;
1903     int msgfd;
1904 } TCPCharDriver;
1905
1906 static void tcp_chr_accept(void *opaque);
1907
1908 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1909 {
1910     TCPCharDriver *s = chr->opaque;
1911     if (s->connected) {
1912         return send_all(s->fd, buf, len);
1913     } else {
1914         /* XXX: indicate an error ? */
1915         return len;
1916     }
1917 }
1918
1919 static int tcp_chr_read_poll(void *opaque)
1920 {
1921     CharDriverState *chr = opaque;
1922     TCPCharDriver *s = chr->opaque;
1923     if (!s->connected)
1924         return 0;
1925     s->max_size = qemu_chr_can_read(chr);
1926     return s->max_size;
1927 }
1928
1929 #define IAC 255
1930 #define IAC_BREAK 243
1931 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
1932                                       TCPCharDriver *s,
1933                                       uint8_t *buf, int *size)
1934 {
1935     /* Handle any telnet client's basic IAC options to satisfy char by
1936      * char mode with no echo.  All IAC options will be removed from
1937      * the buf and the do_telnetopt variable will be used to track the
1938      * state of the width of the IAC information.
1939      *
1940      * IAC commands come in sets of 3 bytes with the exception of the
1941      * "IAC BREAK" command and the double IAC.
1942      */
1943
1944     int i;
1945     int j = 0;
1946
1947     for (i = 0; i < *size; i++) {
1948         if (s->do_telnetopt > 1) {
1949             if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
1950                 /* Double IAC means send an IAC */
1951                 if (j != i)
1952                     buf[j] = buf[i];
1953                 j++;
1954                 s->do_telnetopt = 1;
1955             } else {
1956                 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
1957                     /* Handle IAC break commands by sending a serial break */
1958                     qemu_chr_event(chr, CHR_EVENT_BREAK);
1959                     s->do_telnetopt++;
1960                 }
1961                 s->do_telnetopt++;
1962             }
1963             if (s->do_telnetopt >= 4) {
1964                 s->do_telnetopt = 1;
1965             }
1966         } else {
1967             if ((unsigned char)buf[i] == IAC) {
1968                 s->do_telnetopt = 2;
1969             } else {
1970                 if (j != i)
1971                     buf[j] = buf[i];
1972                 j++;
1973             }
1974         }
1975     }
1976     *size = j;
1977 }
1978
1979 static int tcp_get_msgfd(CharDriverState *chr)
1980 {
1981     TCPCharDriver *s = chr->opaque;
1982     int fd = s->msgfd;
1983     s->msgfd = -1;
1984     return fd;
1985 }
1986
1987 #ifndef _WIN32
1988 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
1989 {
1990     TCPCharDriver *s = chr->opaque;
1991     struct cmsghdr *cmsg;
1992
1993     for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
1994         int fd;
1995
1996         if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
1997             cmsg->cmsg_level != SOL_SOCKET ||
1998             cmsg->cmsg_type != SCM_RIGHTS)
1999             continue;
2000
2001         fd = *((int *)CMSG_DATA(cmsg));
2002         if (fd < 0)
2003             continue;
2004
2005         if (s->msgfd != -1)
2006             close(s->msgfd);
2007         s->msgfd = fd;
2008     }
2009 }
2010
2011 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2012 {
2013     TCPCharDriver *s = chr->opaque;
2014     struct msghdr msg = { NULL, };
2015     struct iovec iov[1];
2016     union {
2017         struct cmsghdr cmsg;
2018         char control[CMSG_SPACE(sizeof(int))];
2019     } msg_control;
2020     ssize_t ret;
2021
2022     iov[0].iov_base = buf;
2023     iov[0].iov_len = len;
2024
2025     msg.msg_iov = iov;
2026     msg.msg_iovlen = 1;
2027     msg.msg_control = &msg_control;
2028     msg.msg_controllen = sizeof(msg_control);
2029
2030     ret = recvmsg(s->fd, &msg, 0);
2031     if (ret > 0 && s->is_unix)
2032         unix_process_msgfd(chr, &msg);
2033
2034     return ret;
2035 }
2036 #else
2037 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2038 {
2039     TCPCharDriver *s = chr->opaque;
2040     return recv(s->fd, buf, len, 0);
2041 }
2042 #endif
2043
2044 static void tcp_chr_read(void *opaque)
2045 {
2046     CharDriverState *chr = opaque;
2047     TCPCharDriver *s = chr->opaque;
2048     uint8_t buf[READ_BUF_LEN];
2049     int len, size;
2050
2051     if (!s->connected || s->max_size <= 0)
2052         return;
2053     len = sizeof(buf);
2054     if (len > s->max_size)
2055         len = s->max_size;
2056     size = tcp_chr_recv(chr, (void *)buf, len);
2057     if (size == 0) {
2058         /* connection closed */
2059         s->connected = 0;
2060         if (s->listen_fd >= 0) {
2061             qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2062         }
2063         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2064         closesocket(s->fd);
2065         s->fd = -1;
2066         qemu_chr_event(chr, CHR_EVENT_CLOSED);
2067     } else if (size > 0) {
2068         if (s->do_telnetopt)
2069             tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2070         if (size > 0)
2071             qemu_chr_read(chr, buf, size);
2072     }
2073 }
2074
2075 #ifndef _WIN32
2076 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2077 {
2078     return qemu_chr_open_fd(eventfd, eventfd);
2079 }
2080 #endif
2081
2082 static void tcp_chr_connect(void *opaque)
2083 {
2084     CharDriverState *chr = opaque;
2085     TCPCharDriver *s = chr->opaque;
2086
2087     s->connected = 1;
2088     qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2089                          tcp_chr_read, NULL, chr);
2090     qemu_chr_generic_open(chr);
2091 }
2092
2093 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2094 static void tcp_chr_telnet_init(int fd)
2095 {
2096     char buf[3];
2097     /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2098     IACSET(buf, 0xff, 0xfb, 0x01);  /* IAC WILL ECHO */
2099     send(fd, (char *)buf, 3, 0);
2100     IACSET(buf, 0xff, 0xfb, 0x03);  /* IAC WILL Suppress go ahead */
2101     send(fd, (char *)buf, 3, 0);
2102     IACSET(buf, 0xff, 0xfb, 0x00);  /* IAC WILL Binary */
2103     send(fd, (char *)buf, 3, 0);
2104     IACSET(buf, 0xff, 0xfd, 0x00);  /* IAC DO Binary */
2105     send(fd, (char *)buf, 3, 0);
2106 }
2107
2108 static void socket_set_nodelay(int fd)
2109 {
2110     int val = 1;
2111     setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2112 }
2113
2114 static void tcp_chr_accept(void *opaque)
2115 {
2116     CharDriverState *chr = opaque;
2117     TCPCharDriver *s = chr->opaque;
2118     struct sockaddr_in saddr;
2119 #ifndef _WIN32
2120     struct sockaddr_un uaddr;
2121 #endif
2122     struct sockaddr *addr;
2123     socklen_t len;
2124     int fd;
2125
2126     for(;;) {
2127 #ifndef _WIN32
2128         if (s->is_unix) {
2129             len = sizeof(uaddr);
2130             addr = (struct sockaddr *)&uaddr;
2131         } else
2132 #endif
2133         {
2134             len = sizeof(saddr);
2135             addr = (struct sockaddr *)&saddr;
2136         }
2137         fd = qemu_accept(s->listen_fd, addr, &len);
2138         if (fd < 0 && errno != EINTR) {
2139             return;
2140         } else if (fd >= 0) {
2141             if (s->do_telnetopt)
2142                 tcp_chr_telnet_init(fd);
2143             break;
2144         }
2145     }
2146     socket_set_nonblock(fd);
2147     if (s->do_nodelay)
2148         socket_set_nodelay(fd);
2149     s->fd = fd;
2150     qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2151     tcp_chr_connect(chr);
2152 }
2153
2154 static void tcp_chr_close(CharDriverState *chr)
2155 {
2156     TCPCharDriver *s = chr->opaque;
2157     if (s->fd >= 0) {
2158         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2159         closesocket(s->fd);
2160     }
2161     if (s->listen_fd >= 0) {
2162         qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2163         closesocket(s->listen_fd);
2164     }
2165     qemu_free(s);
2166     qemu_chr_event(chr, CHR_EVENT_CLOSED);
2167 }
2168
2169 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2170 {
2171     CharDriverState *chr = NULL;
2172     TCPCharDriver *s = NULL;
2173     int fd = -1;
2174     int is_listen;
2175     int is_waitconnect;
2176     int do_nodelay;
2177     int is_unix;
2178     int is_telnet;
2179
2180     is_listen      = qemu_opt_get_bool(opts, "server", 0);
2181     is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2182     is_telnet      = qemu_opt_get_bool(opts, "telnet", 0);
2183     do_nodelay     = !qemu_opt_get_bool(opts, "delay", 1);
2184     is_unix        = qemu_opt_get(opts, "path") != NULL;
2185     if (!is_listen)
2186         is_waitconnect = 0;
2187
2188     chr = qemu_mallocz(sizeof(CharDriverState));
2189     s = qemu_mallocz(sizeof(TCPCharDriver));
2190
2191     if (is_unix) {
2192         if (is_listen) {
2193             fd = unix_listen_opts(opts);
2194         } else {
2195             fd = unix_connect_opts(opts);
2196         }
2197     } else {
2198         if (is_listen) {
2199             fd = inet_listen_opts(opts, 0);
2200         } else {
2201             fd = inet_connect_opts(opts);
2202         }
2203     }
2204     if (fd < 0)
2205         goto fail;
2206
2207     if (!is_waitconnect)
2208         socket_set_nonblock(fd);
2209
2210     s->connected = 0;
2211     s->fd = -1;
2212     s->listen_fd = -1;
2213     s->msgfd = -1;
2214     s->is_unix = is_unix;
2215     s->do_nodelay = do_nodelay && !is_unix;
2216
2217     chr->opaque = s;
2218     chr->chr_write = tcp_chr_write;
2219     chr->chr_close = tcp_chr_close;
2220     chr->get_msgfd = tcp_get_msgfd;
2221
2222     if (is_listen) {
2223         s->listen_fd = fd;
2224         qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2225         if (is_telnet)
2226             s->do_telnetopt = 1;
2227
2228     } else {
2229         s->connected = 1;
2230         s->fd = fd;
2231         socket_set_nodelay(fd);
2232         tcp_chr_connect(chr);
2233     }
2234
2235     /* for "info chardev" monitor command */
2236     chr->filename = qemu_malloc(256);
2237     if (is_unix) {
2238         snprintf(chr->filename, 256, "unix:%s%s",
2239                  qemu_opt_get(opts, "path"),
2240                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2241     } else if (is_telnet) {
2242         snprintf(chr->filename, 256, "telnet:%s:%s%s",
2243                  qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2244                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2245     } else {
2246         snprintf(chr->filename, 256, "tcp:%s:%s%s",
2247                  qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2248                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2249     }
2250
2251     if (is_listen && is_waitconnect) {
2252         printf("QEMU waiting for connection on: %s\n",
2253                chr->filename);
2254         tcp_chr_accept(chr);
2255         socket_set_nonblock(s->listen_fd);
2256     }
2257     return chr;
2258
2259  fail:
2260     if (fd >= 0)
2261         closesocket(fd);
2262     qemu_free(s);
2263     qemu_free(chr);
2264     return NULL;
2265 }
2266
2267 /***********************************************************/
2268 /* Memory chardev */
2269 typedef struct {
2270     size_t outbuf_size;
2271     size_t outbuf_capacity;
2272     uint8_t *outbuf;
2273 } MemoryDriver;
2274
2275 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2276 {
2277     MemoryDriver *d = chr->opaque;
2278
2279     /* TODO: the QString implementation has the same code, we should
2280      * introduce a generic way to do this in cutils.c */
2281     if (d->outbuf_capacity < d->outbuf_size + len) {
2282         /* grow outbuf */
2283         d->outbuf_capacity += len;
2284         d->outbuf_capacity *= 2;
2285         d->outbuf = qemu_realloc(d->outbuf, d->outbuf_capacity);
2286     }
2287
2288     memcpy(d->outbuf + d->outbuf_size, buf, len);
2289     d->outbuf_size += len;
2290
2291     return len;
2292 }
2293
2294 void qemu_chr_init_mem(CharDriverState *chr)
2295 {
2296     MemoryDriver *d;
2297
2298     d = qemu_malloc(sizeof(*d));
2299     d->outbuf_size = 0;
2300     d->outbuf_capacity = 4096;
2301     d->outbuf = qemu_mallocz(d->outbuf_capacity);
2302
2303     memset(chr, 0, sizeof(*chr));
2304     chr->opaque = d;
2305     chr->chr_write = mem_chr_write;
2306 }
2307
2308 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2309 {
2310     MemoryDriver *d = chr->opaque;
2311     return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2312 }
2313
2314 /* NOTE: this driver can not be closed with qemu_chr_close()! */
2315 void qemu_chr_close_mem(CharDriverState *chr)
2316 {
2317     MemoryDriver *d = chr->opaque;
2318
2319     qemu_free(d->outbuf);
2320     qemu_free(chr->opaque);
2321     chr->opaque = NULL;
2322     chr->chr_write = NULL;
2323 }
2324
2325 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2326 {
2327     const MemoryDriver *d = chr->opaque;
2328     return d->outbuf_size;
2329 }
2330
2331 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2332 {
2333     char host[65], port[33], width[8], height[8];
2334     int pos;
2335     const char *p;
2336     QemuOpts *opts;
2337
2338     opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
2339     if (NULL == opts)
2340         return NULL;
2341
2342     if (strstart(filename, "mon:", &p)) {
2343         filename = p;
2344         qemu_opt_set(opts, "mux", "on");
2345     }
2346
2347     if (strcmp(filename, "null")    == 0 ||
2348         strcmp(filename, "pty")     == 0 ||
2349         strcmp(filename, "msmouse") == 0 ||
2350         strcmp(filename, "braille") == 0 ||
2351         strcmp(filename, "stdio")   == 0) {
2352         qemu_opt_set(opts, "backend", filename);
2353         return opts;
2354     }
2355     if (strstart(filename, "vc", &p)) {
2356         qemu_opt_set(opts, "backend", "vc");
2357         if (*p == ':') {
2358             if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2359                 /* pixels */
2360                 qemu_opt_set(opts, "width", width);
2361                 qemu_opt_set(opts, "height", height);
2362             } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2363                 /* chars */
2364                 qemu_opt_set(opts, "cols", width);
2365                 qemu_opt_set(opts, "rows", height);
2366             } else {
2367                 goto fail;
2368             }
2369         }
2370         return opts;
2371     }
2372     if (strcmp(filename, "con:") == 0) {
2373         qemu_opt_set(opts, "backend", "console");
2374         return opts;
2375     }
2376     if (strstart(filename, "COM", NULL)) {
2377         qemu_opt_set(opts, "backend", "serial");
2378         qemu_opt_set(opts, "path", filename);
2379         return opts;
2380     }
2381     if (strstart(filename, "file:", &p)) {
2382         qemu_opt_set(opts, "backend", "file");
2383         qemu_opt_set(opts, "path", p);
2384         return opts;
2385     }
2386     if (strstart(filename, "pipe:", &p)) {
2387         qemu_opt_set(opts, "backend", "pipe");
2388         qemu_opt_set(opts, "path", p);
2389         return opts;
2390     }
2391     if (strstart(filename, "tcp:", &p) ||
2392         strstart(filename, "telnet:", &p)) {
2393         if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2394             host[0] = 0;
2395             if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2396                 goto fail;
2397         }
2398         qemu_opt_set(opts, "backend", "socket");
2399         qemu_opt_set(opts, "host", host);
2400         qemu_opt_set(opts, "port", port);
2401         if (p[pos] == ',') {
2402             if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2403                 goto fail;
2404         }
2405         if (strstart(filename, "telnet:", &p))
2406             qemu_opt_set(opts, "telnet", "on");
2407         return opts;
2408     }
2409     if (strstart(filename, "udp:", &p)) {
2410         qemu_opt_set(opts, "backend", "udp");
2411         if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2412             host[0] = 0;
2413             if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2414                 goto fail;
2415             }
2416         }
2417         qemu_opt_set(opts, "host", host);
2418         qemu_opt_set(opts, "port", port);
2419         if (p[pos] == '@') {
2420             p += pos + 1;
2421             if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2422                 host[0] = 0;
2423                 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2424                     goto fail;
2425                 }
2426             }
2427             qemu_opt_set(opts, "localaddr", host);
2428             qemu_opt_set(opts, "localport", port);
2429         }
2430         return opts;
2431     }
2432     if (strstart(filename, "unix:", &p)) {
2433         qemu_opt_set(opts, "backend", "socket");
2434         if (qemu_opts_do_parse(opts, p, "path") != 0)
2435             goto fail;
2436         return opts;
2437     }
2438     if (strstart(filename, "/dev/parport", NULL) ||
2439         strstart(filename, "/dev/ppi", NULL)) {
2440         qemu_opt_set(opts, "backend", "parport");
2441         qemu_opt_set(opts, "path", filename);
2442         return opts;
2443     }
2444     if (strstart(filename, "/dev/", NULL)) {
2445         qemu_opt_set(opts, "backend", "tty");
2446         qemu_opt_set(opts, "path", filename);
2447         return opts;
2448     }
2449
2450 fail:
2451     qemu_opts_del(opts);
2452     return NULL;
2453 }
2454
2455 static const struct {
2456     const char *name;
2457     CharDriverState *(*open)(QemuOpts *opts);
2458 } backend_table[] = {
2459     { .name = "null",      .open = qemu_chr_open_null },
2460     { .name = "socket",    .open = qemu_chr_open_socket },
2461     { .name = "udp",       .open = qemu_chr_open_udp },
2462     { .name = "msmouse",   .open = qemu_chr_open_msmouse },
2463     { .name = "vc",        .open = text_console_init },
2464 #ifdef _WIN32
2465     { .name = "file",      .open = qemu_chr_open_win_file_out },
2466     { .name = "pipe",      .open = qemu_chr_open_win_pipe },
2467     { .name = "console",   .open = qemu_chr_open_win_con },
2468     { .name = "serial",    .open = qemu_chr_open_win },
2469 #else
2470     { .name = "file",      .open = qemu_chr_open_file_out },
2471     { .name = "pipe",      .open = qemu_chr_open_pipe },
2472     { .name = "pty",       .open = qemu_chr_open_pty },
2473     { .name = "stdio",     .open = qemu_chr_open_stdio },
2474 #endif
2475 #ifdef CONFIG_BRLAPI
2476     { .name = "braille",   .open = chr_baum_init },
2477 #endif
2478 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2479     || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
2480     || defined(__FreeBSD_kernel__)
2481     { .name = "tty",       .open = qemu_chr_open_tty },
2482 #endif
2483 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
2484     || defined(__FreeBSD_kernel__)
2485     { .name = "parport",   .open = qemu_chr_open_pp },
2486 #endif
2487 #ifdef CONFIG_SPICE
2488     { .name = "spicevmc",     .open = qemu_chr_open_spice },
2489 #endif
2490 };
2491
2492 CharDriverState *qemu_chr_open_opts(QemuOpts *opts,
2493                                     void (*init)(struct CharDriverState *s))
2494 {
2495     CharDriverState *chr;
2496     int i;
2497
2498     if (qemu_opts_id(opts) == NULL) {
2499         fprintf(stderr, "chardev: no id specified\n");
2500         return NULL;
2501     }
2502
2503     for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2504         if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2505             break;
2506     }
2507     if (i == ARRAY_SIZE(backend_table)) {
2508         fprintf(stderr, "chardev: backend \"%s\" not found\n",
2509                 qemu_opt_get(opts, "backend"));
2510         return NULL;
2511     }
2512
2513     chr = backend_table[i].open(opts);
2514     if (!chr) {
2515         fprintf(stderr, "chardev: opening backend \"%s\" failed\n",
2516                 qemu_opt_get(opts, "backend"));
2517         return NULL;
2518     }
2519
2520     if (!chr->filename)
2521         chr->filename = qemu_strdup(qemu_opt_get(opts, "backend"));
2522     chr->init = init;
2523     QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2524
2525     if (qemu_opt_get_bool(opts, "mux", 0)) {
2526         CharDriverState *base = chr;
2527         int len = strlen(qemu_opts_id(opts)) + 6;
2528         base->label = qemu_malloc(len);
2529         snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
2530         chr = qemu_chr_open_mux(base);
2531         chr->filename = base->filename;
2532         QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2533     }
2534     chr->label = qemu_strdup(qemu_opts_id(opts));
2535     return chr;
2536 }
2537
2538 CharDriverState *qemu_chr_open(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2539 {
2540     const char *p;
2541     CharDriverState *chr;
2542     QemuOpts *opts;
2543
2544     if (strstart(filename, "chardev:", &p)) {
2545         return qemu_chr_find(p);
2546     }
2547
2548     opts = qemu_chr_parse_compat(label, filename);
2549     if (!opts)
2550         return NULL;
2551
2552     chr = qemu_chr_open_opts(opts, init);
2553     if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
2554         monitor_init(chr, MONITOR_USE_READLINE);
2555     }
2556     return chr;
2557 }
2558
2559 void qemu_chr_set_echo(struct CharDriverState *chr, bool echo)
2560 {
2561     if (chr->chr_set_echo) {
2562         chr->chr_set_echo(chr, echo);
2563     }
2564 }
2565
2566 void qemu_chr_close(CharDriverState *chr)
2567 {
2568     QTAILQ_REMOVE(&chardevs, chr, next);
2569     if (chr->chr_close)
2570         chr->chr_close(chr);
2571     qemu_free(chr->filename);
2572     qemu_free(chr->label);
2573     qemu_free(chr);
2574 }
2575
2576 static void qemu_chr_qlist_iter(QObject *obj, void *opaque)
2577 {
2578     QDict *chr_dict;
2579     Monitor *mon = opaque;
2580
2581     chr_dict = qobject_to_qdict(obj);
2582     monitor_printf(mon, "%s: filename=%s\n", qdict_get_str(chr_dict, "label"),
2583                                          qdict_get_str(chr_dict, "filename"));
2584 }
2585
2586 void qemu_chr_info_print(Monitor *mon, const QObject *ret_data)
2587 {
2588     qlist_iter(qobject_to_qlist(ret_data), qemu_chr_qlist_iter, mon);
2589 }
2590
2591 void qemu_chr_info(Monitor *mon, QObject **ret_data)
2592 {
2593     QList *chr_list;
2594     CharDriverState *chr;
2595
2596     chr_list = qlist_new();
2597
2598     QTAILQ_FOREACH(chr, &chardevs, next) {
2599         QObject *obj = qobject_from_jsonf("{ 'label': %s, 'filename': %s }",
2600                                           chr->label, chr->filename);
2601         qlist_append_obj(chr_list, obj);
2602     }
2603
2604     *ret_data = QOBJECT(chr_list);
2605 }
2606
2607 CharDriverState *qemu_chr_find(const char *name)
2608 {
2609     CharDriverState *chr;
2610
2611     QTAILQ_FOREACH(chr, &chardevs, next) {
2612         if (strcmp(chr->label, name) != 0)
2613             continue;
2614         return chr;
2615     }
2616     return NULL;
2617 }