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