File:  [Qemu by Fabrice Bellard] / qemu / qemu-char.c
Revision 1.1.1.11 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 18:56:03 2018 UTC (3 years, 5 months ago) by root
Branches: qemu, MAIN
CVS tags: qemu1000, qemu0151, HEAD
qemu 0.15.1

    1: /*
    2:  * QEMU System Emulator
    3:  *
    4:  * Copyright (c) 2003-2008 Fabrice Bellard
    5:  *
    6:  * Permission is hereby granted, free of charge, to any person obtaining a copy
    7:  * of this software and associated documentation files (the "Software"), to deal
    8:  * in the Software without restriction, including without limitation the rights
    9:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   10:  * copies of the Software, and to permit persons to whom the Software is
   11:  * furnished to do so, subject to the following conditions:
   12:  *
   13:  * The above copyright notice and this permission notice shall be included in
   14:  * all copies or substantial portions of the Software.
   15:  *
   16:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   17:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   18:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
   19:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   20:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   21:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   22:  * THE SOFTWARE.
   23:  */
   24: #include "qemu-common.h"
   25: #include "net.h"
   26: #include "monitor.h"
   27: #include "console.h"
   28: #include "sysemu.h"
   29: #include "qemu-timer.h"
   30: #include "qemu-char.h"
   31: #include "hw/usb.h"
   32: #include "hw/baum.h"
   33: #include "hw/msmouse.h"
   34: #include "qemu-objects.h"
   35: 
   36: #include <unistd.h>
   37: #include <fcntl.h>
   38: #include <time.h>
   39: #include <errno.h>
   40: #include <sys/time.h>
   41: #include <zlib.h>
   42: 
   43: #ifndef _WIN32
   44: #include <sys/times.h>
   45: #include <sys/wait.h>
   46: #include <termios.h>
   47: #include <sys/mman.h>
   48: #include <sys/ioctl.h>
   49: #include <sys/resource.h>
   50: #include <sys/socket.h>
   51: #include <netinet/in.h>
   52: #include <net/if.h>
   53: #include <arpa/inet.h>
   54: #include <dirent.h>
   55: #include <netdb.h>
   56: #include <sys/select.h>
   57: #ifdef CONFIG_BSD
   58: #include <sys/stat.h>
   59: #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
   60: #include <libutil.h>
   61: #include <dev/ppbus/ppi.h>
   62: #include <dev/ppbus/ppbconf.h>
   63: #if defined(__GLIBC__)
   64: #include <pty.h>
   65: #endif
   66: #elif defined(__DragonFly__)
   67: #include <libutil.h>
   68: #include <dev/misc/ppi/ppi.h>
   69: #include <bus/ppbus/ppbconf.h>
   70: #else
   71: #include <util.h>
   72: #endif
   73: #else
   74: #ifdef __linux__
   75: #include <pty.h>
   76: 
   77: #include <linux/ppdev.h>
   78: #include <linux/parport.h>
   79: #endif
   80: #ifdef __sun__
   81: #include <sys/stat.h>
   82: #include <sys/ethernet.h>
   83: #include <sys/sockio.h>
   84: #include <netinet/arp.h>
   85: #include <netinet/in.h>
   86: #include <netinet/in_systm.h>
   87: #include <netinet/ip.h>
   88: #include <netinet/ip_icmp.h> // must come after ip.h
   89: #include <netinet/udp.h>
   90: #include <netinet/tcp.h>
   91: #include <net/if.h>
   92: #include <syslog.h>
   93: #include <stropts.h>
   94: #endif
   95: #endif
   96: #endif
   97: 
   98: #include "qemu_socket.h"
   99: #include "ui/qemu-spice.h"
  100: 
  101: #define READ_BUF_LEN 4096
  102: 
  103: /***********************************************************/
  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: int qemu_chr_add_client(CharDriverState *s, int fd)
  172: {
  173:     return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
  174: }
  175: 
  176: void qemu_chr_accept_input(CharDriverState *s)
  177: {
  178:     if (s->chr_accept_input)
  179:         s->chr_accept_input(s);
  180: }
  181: 
  182: void qemu_chr_printf(CharDriverState *s, const char *fmt, ...)
  183: {
  184:     char buf[READ_BUF_LEN];
  185:     va_list ap;
  186:     va_start(ap, fmt);
  187:     vsnprintf(buf, sizeof(buf), fmt, ap);
  188:     qemu_chr_write(s, (uint8_t *)buf, strlen(buf));
  189:     va_end(ap);
  190: }
  191: 
  192: void qemu_chr_send_event(CharDriverState *s, int event)
  193: {
  194:     if (s->chr_send_event)
  195:         s->chr_send_event(s, event);
  196: }
  197: 
  198: void qemu_chr_add_handlers(CharDriverState *s,
  199:                            IOCanReadHandler *fd_can_read,
  200:                            IOReadHandler *fd_read,
  201:                            IOEventHandler *fd_event,
  202:                            void *opaque)
  203: {
  204:     if (!opaque && !fd_can_read && !fd_read && !fd_event) {
  205:         /* chr driver being released. */
  206:         ++s->avail_connections;
  207:     }
  208:     s->chr_can_read = fd_can_read;
  209:     s->chr_read = fd_read;
  210:     s->chr_event = fd_event;
  211:     s->handler_opaque = opaque;
  212:     if (s->chr_update_read_handler)
  213:         s->chr_update_read_handler(s);
  214: 
  215:     /* We're connecting to an already opened device, so let's make sure we
  216:        also get the open event */
  217:     if (s->opened) {
  218:         qemu_chr_generic_open(s);
  219:     }
  220: }
  221: 
  222: static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
  223: {
  224:     return len;
  225: }
  226: 
  227: static int qemu_chr_open_null(QemuOpts *opts, CharDriverState **_chr)
  228: {
  229:     CharDriverState *chr;
  230: 
  231:     chr = qemu_mallocz(sizeof(CharDriverState));
  232:     chr->chr_write = null_chr_write;
  233: 
  234:     *_chr= chr;
  235:     return 0;
  236: }
  237: 
  238: /* MUX driver for serial I/O splitting */
  239: #define MAX_MUX 4
  240: #define MUX_BUFFER_SIZE 32	/* Must be a power of 2.  */
  241: #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
  242: typedef struct {
  243:     IOCanReadHandler *chr_can_read[MAX_MUX];
  244:     IOReadHandler *chr_read[MAX_MUX];
  245:     IOEventHandler *chr_event[MAX_MUX];
  246:     void *ext_opaque[MAX_MUX];
  247:     CharDriverState *drv;
  248:     int focus;
  249:     int mux_cnt;
  250:     int term_got_escape;
  251:     int max_size;
  252:     /* Intermediate input buffer allows to catch escape sequences even if the
  253:        currently active device is not accepting any input - but only until it
  254:        is full as well. */
  255:     unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
  256:     int prod[MAX_MUX];
  257:     int cons[MAX_MUX];
  258:     int timestamps;
  259:     int linestart;
  260:     int64_t timestamps_start;
  261: } MuxDriver;
  262: 
  263: 
  264: static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
  265: {
  266:     MuxDriver *d = chr->opaque;
  267:     int ret;
  268:     if (!d->timestamps) {
  269:         ret = d->drv->chr_write(d->drv, buf, len);
  270:     } else {
  271:         int i;
  272: 
  273:         ret = 0;
  274:         for (i = 0; i < len; i++) {
  275:             if (d->linestart) {
  276:                 char buf1[64];
  277:                 int64_t ti;
  278:                 int secs;
  279: 
  280:                 ti = qemu_get_clock_ms(rt_clock);
  281:                 if (d->timestamps_start == -1)
  282:                     d->timestamps_start = ti;
  283:                 ti -= d->timestamps_start;
  284:                 secs = ti / 1000;
  285:                 snprintf(buf1, sizeof(buf1),
  286:                          "[%02d:%02d:%02d.%03d] ",
  287:                          secs / 3600,
  288:                          (secs / 60) % 60,
  289:                          secs % 60,
  290:                          (int)(ti % 1000));
  291:                 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
  292:                 d->linestart = 0;
  293:             }
  294:             ret += d->drv->chr_write(d->drv, buf+i, 1);
  295:             if (buf[i] == '\n') {
  296:                 d->linestart = 1;
  297:             }
  298:         }
  299:     }
  300:     return ret;
  301: }
  302: 
  303: static const char * const mux_help[] = {
  304:     "% h    print this help\n\r",
  305:     "% x    exit emulator\n\r",
  306:     "% s    save disk data back to file (if -snapshot)\n\r",
  307:     "% t    toggle console timestamps\n\r"
  308:     "% b    send break (magic sysrq)\n\r",
  309:     "% c    switch between console and monitor\n\r",
  310:     "% %  sends %\n\r",
  311:     NULL
  312: };
  313: 
  314: int term_escape_char = 0x01; /* ctrl-a is used for escape */
  315: static void mux_print_help(CharDriverState *chr)
  316: {
  317:     int i, j;
  318:     char ebuf[15] = "Escape-Char";
  319:     char cbuf[50] = "\n\r";
  320: 
  321:     if (term_escape_char > 0 && term_escape_char < 26) {
  322:         snprintf(cbuf, sizeof(cbuf), "\n\r");
  323:         snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
  324:     } else {
  325:         snprintf(cbuf, sizeof(cbuf),
  326:                  "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
  327:                  term_escape_char);
  328:     }
  329:     chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
  330:     for (i = 0; mux_help[i] != NULL; i++) {
  331:         for (j=0; mux_help[i][j] != '\0'; j++) {
  332:             if (mux_help[i][j] == '%')
  333:                 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
  334:             else
  335:                 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
  336:         }
  337:     }
  338: }
  339: 
  340: static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
  341: {
  342:     if (d->chr_event[mux_nr])
  343:         d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
  344: }
  345: 
  346: static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
  347: {
  348:     if (d->term_got_escape) {
  349:         d->term_got_escape = 0;
  350:         if (ch == term_escape_char)
  351:             goto send_char;
  352:         switch(ch) {
  353:         case '?':
  354:         case 'h':
  355:             mux_print_help(chr);
  356:             break;
  357:         case 'x':
  358:             {
  359:                  const char *term =  "QEMU: Terminated\n\r";
  360:                  chr->chr_write(chr,(uint8_t *)term,strlen(term));
  361:                  exit(0);
  362:                  break;
  363:             }
  364:         case 's':
  365:             bdrv_commit_all();
  366:             break;
  367:         case 'b':
  368:             qemu_chr_event(chr, CHR_EVENT_BREAK);
  369:             break;
  370:         case 'c':
  371:             /* Switch to the next registered device */
  372:             mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
  373:             d->focus++;
  374:             if (d->focus >= d->mux_cnt)
  375:                 d->focus = 0;
  376:             mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
  377:             break;
  378:         case 't':
  379:             d->timestamps = !d->timestamps;
  380:             d->timestamps_start = -1;
  381:             d->linestart = 0;
  382:             break;
  383:         }
  384:     } else if (ch == term_escape_char) {
  385:         d->term_got_escape = 1;
  386:     } else {
  387:     send_char:
  388:         return 1;
  389:     }
  390:     return 0;
  391: }
  392: 
  393: static void mux_chr_accept_input(CharDriverState *chr)
  394: {
  395:     MuxDriver *d = chr->opaque;
  396:     int m = d->focus;
  397: 
  398:     while (d->prod[m] != d->cons[m] &&
  399:            d->chr_can_read[m] &&
  400:            d->chr_can_read[m](d->ext_opaque[m])) {
  401:         d->chr_read[m](d->ext_opaque[m],
  402:                        &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
  403:     }
  404: }
  405: 
  406: static int mux_chr_can_read(void *opaque)
  407: {
  408:     CharDriverState *chr = opaque;
  409:     MuxDriver *d = chr->opaque;
  410:     int m = d->focus;
  411: 
  412:     if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
  413:         return 1;
  414:     if (d->chr_can_read[m])
  415:         return d->chr_can_read[m](d->ext_opaque[m]);
  416:     return 0;
  417: }
  418: 
  419: static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
  420: {
  421:     CharDriverState *chr = opaque;
  422:     MuxDriver *d = chr->opaque;
  423:     int m = d->focus;
  424:     int i;
  425: 
  426:     mux_chr_accept_input (opaque);
  427: 
  428:     for(i = 0; i < size; i++)
  429:         if (mux_proc_byte(chr, d, buf[i])) {
  430:             if (d->prod[m] == d->cons[m] &&
  431:                 d->chr_can_read[m] &&
  432:                 d->chr_can_read[m](d->ext_opaque[m]))
  433:                 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
  434:             else
  435:                 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
  436:         }
  437: }
  438: 
  439: static void mux_chr_event(void *opaque, int event)
  440: {
  441:     CharDriverState *chr = opaque;
  442:     MuxDriver *d = chr->opaque;
  443:     int i;
  444: 
  445:     /* Send the event to all registered listeners */
  446:     for (i = 0; i < d->mux_cnt; i++)
  447:         mux_chr_send_event(d, i, event);
  448: }
  449: 
  450: static void mux_chr_update_read_handler(CharDriverState *chr)
  451: {
  452:     MuxDriver *d = chr->opaque;
  453: 
  454:     if (d->mux_cnt >= MAX_MUX) {
  455:         fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
  456:         return;
  457:     }
  458:     d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
  459:     d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
  460:     d->chr_read[d->mux_cnt] = chr->chr_read;
  461:     d->chr_event[d->mux_cnt] = chr->chr_event;
  462:     /* Fix up the real driver with mux routines */
  463:     if (d->mux_cnt == 0) {
  464:         qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
  465:                               mux_chr_event, chr);
  466:     }
  467:     if (d->focus != -1) {
  468:         mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
  469:     }
  470:     d->focus = d->mux_cnt;
  471:     d->mux_cnt++;
  472:     mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
  473: }
  474: 
  475: static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
  476: {
  477:     CharDriverState *chr;
  478:     MuxDriver *d;
  479: 
  480:     chr = qemu_mallocz(sizeof(CharDriverState));
  481:     d = qemu_mallocz(sizeof(MuxDriver));
  482: 
  483:     chr->opaque = d;
  484:     d->drv = drv;
  485:     d->focus = -1;
  486:     chr->chr_write = mux_chr_write;
  487:     chr->chr_update_read_handler = mux_chr_update_read_handler;
  488:     chr->chr_accept_input = mux_chr_accept_input;
  489:     /* Frontend guest-open / -close notification is not support with muxes */
  490:     chr->chr_guest_open = NULL;
  491:     chr->chr_guest_close = NULL;
  492: 
  493:     /* Muxes are always open on creation */
  494:     qemu_chr_generic_open(chr);
  495: 
  496:     return chr;
  497: }
  498: 
  499: 
  500: #ifdef _WIN32
  501: int send_all(int fd, const void *buf, int len1)
  502: {
  503:     int ret, len;
  504: 
  505:     len = len1;
  506:     while (len > 0) {
  507:         ret = send(fd, buf, len, 0);
  508:         if (ret < 0) {
  509:             errno = WSAGetLastError();
  510:             if (errno != WSAEWOULDBLOCK) {
  511:                 return -1;
  512:             }
  513:         } else if (ret == 0) {
  514:             break;
  515:         } else {
  516:             buf += ret;
  517:             len -= ret;
  518:         }
  519:     }
  520:     return len1 - len;
  521: }
  522: 
  523: #else
  524: 
  525: int send_all(int fd, const void *_buf, int len1)
  526: {
  527:     int ret, len;
  528:     const uint8_t *buf = _buf;
  529: 
  530:     len = len1;
  531:     while (len > 0) {
  532:         ret = write(fd, buf, len);
  533:         if (ret < 0) {
  534:             if (errno != EINTR && errno != EAGAIN)
  535:                 return -1;
  536:         } else if (ret == 0) {
  537:             break;
  538:         } else {
  539:             buf += ret;
  540:             len -= ret;
  541:         }
  542:     }
  543:     return len1 - len;
  544: }
  545: #endif /* !_WIN32 */
  546: 
  547: #ifndef _WIN32
  548: 
  549: typedef struct {
  550:     int fd_in, fd_out;
  551:     int max_size;
  552: } FDCharDriver;
  553: 
  554: #define STDIO_MAX_CLIENTS 1
  555: static int stdio_nb_clients = 0;
  556: 
  557: static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
  558: {
  559:     FDCharDriver *s = chr->opaque;
  560:     return send_all(s->fd_out, buf, len);
  561: }
  562: 
  563: static int fd_chr_read_poll(void *opaque)
  564: {
  565:     CharDriverState *chr = opaque;
  566:     FDCharDriver *s = chr->opaque;
  567: 
  568:     s->max_size = qemu_chr_can_read(chr);
  569:     return s->max_size;
  570: }
  571: 
  572: static void fd_chr_read(void *opaque)
  573: {
  574:     CharDriverState *chr = opaque;
  575:     FDCharDriver *s = chr->opaque;
  576:     int size, len;
  577:     uint8_t buf[READ_BUF_LEN];
  578: 
  579:     len = sizeof(buf);
  580:     if (len > s->max_size)
  581:         len = s->max_size;
  582:     if (len == 0)
  583:         return;
  584:     size = read(s->fd_in, buf, len);
  585:     if (size == 0) {
  586:         /* FD has been closed. Remove it from the active list.  */
  587:         qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
  588:         qemu_chr_event(chr, CHR_EVENT_CLOSED);
  589:         return;
  590:     }
  591:     if (size > 0) {
  592:         qemu_chr_read(chr, buf, size);
  593:     }
  594: }
  595: 
  596: static void fd_chr_update_read_handler(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, fd_chr_read_poll,
  604:                                  fd_chr_read, NULL, chr);
  605:         }
  606:     }
  607: }
  608: 
  609: static void fd_chr_close(struct CharDriverState *chr)
  610: {
  611:     FDCharDriver *s = chr->opaque;
  612: 
  613:     if (s->fd_in >= 0) {
  614:         if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
  615:         } else {
  616:             qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
  617:         }
  618:     }
  619: 
  620:     qemu_free(s);
  621:     qemu_chr_event(chr, CHR_EVENT_CLOSED);
  622: }
  623: 
  624: /* open a character device to a unix fd */
  625: static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
  626: {
  627:     CharDriverState *chr;
  628:     FDCharDriver *s;
  629: 
  630:     chr = qemu_mallocz(sizeof(CharDriverState));
  631:     s = qemu_mallocz(sizeof(FDCharDriver));
  632:     s->fd_in = fd_in;
  633:     s->fd_out = fd_out;
  634:     chr->opaque = s;
  635:     chr->chr_write = fd_chr_write;
  636:     chr->chr_update_read_handler = fd_chr_update_read_handler;
  637:     chr->chr_close = fd_chr_close;
  638: 
  639:     qemu_chr_generic_open(chr);
  640: 
  641:     return chr;
  642: }
  643: 
  644: static int qemu_chr_open_file_out(QemuOpts *opts, CharDriverState **_chr)
  645: {
  646:     int fd_out;
  647: 
  648:     TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
  649:                       O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
  650:     if (fd_out < 0) {
  651:         return -errno;
  652:     }
  653: 
  654:     *_chr = qemu_chr_open_fd(-1, fd_out);
  655:     return 0;
  656: }
  657: 
  658: static int qemu_chr_open_pipe(QemuOpts *opts, CharDriverState **_chr)
  659: {
  660:     int fd_in, fd_out;
  661:     char filename_in[256], filename_out[256];
  662:     const char *filename = qemu_opt_get(opts, "path");
  663: 
  664:     if (filename == NULL) {
  665:         fprintf(stderr, "chardev: pipe: no filename given\n");
  666:         return -EINVAL;
  667:     }
  668: 
  669:     snprintf(filename_in, 256, "%s.in", filename);
  670:     snprintf(filename_out, 256, "%s.out", filename);
  671:     TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
  672:     TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
  673:     if (fd_in < 0 || fd_out < 0) {
  674: 	if (fd_in >= 0)
  675: 	    close(fd_in);
  676: 	if (fd_out >= 0)
  677: 	    close(fd_out);
  678:         TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
  679:         if (fd_in < 0) {
  680:             return -errno;
  681:         }
  682:     }
  683: 
  684:     *_chr = qemu_chr_open_fd(fd_in, fd_out);
  685:     return 0;
  686: }
  687: 
  688: 
  689: /* for STDIO, we handle the case where several clients use it
  690:    (nographic mode) */
  691: 
  692: #define TERM_FIFO_MAX_SIZE 1
  693: 
  694: static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
  695: static int term_fifo_size;
  696: 
  697: static int stdio_read_poll(void *opaque)
  698: {
  699:     CharDriverState *chr = opaque;
  700: 
  701:     /* try to flush the queue if needed */
  702:     if (term_fifo_size != 0 && qemu_chr_can_read(chr) > 0) {
  703:         qemu_chr_read(chr, term_fifo, 1);
  704:         term_fifo_size = 0;
  705:     }
  706:     /* see if we can absorb more chars */
  707:     if (term_fifo_size == 0)
  708:         return 1;
  709:     else
  710:         return 0;
  711: }
  712: 
  713: static void stdio_read(void *opaque)
  714: {
  715:     int size;
  716:     uint8_t buf[1];
  717:     CharDriverState *chr = opaque;
  718: 
  719:     size = read(0, buf, 1);
  720:     if (size == 0) {
  721:         /* stdin has been closed. Remove it from the active list.  */
  722:         qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
  723:         qemu_chr_event(chr, CHR_EVENT_CLOSED);
  724:         return;
  725:     }
  726:     if (size > 0) {
  727:         if (qemu_chr_can_read(chr) > 0) {
  728:             qemu_chr_read(chr, buf, 1);
  729:         } else if (term_fifo_size == 0) {
  730:             term_fifo[term_fifo_size++] = buf[0];
  731:         }
  732:     }
  733: }
  734: 
  735: /* init terminal so that we can grab keys */
  736: static struct termios oldtty;
  737: static int old_fd0_flags;
  738: static bool stdio_allow_signal;
  739: 
  740: static void term_exit(void)
  741: {
  742:     tcsetattr (0, TCSANOW, &oldtty);
  743:     fcntl(0, F_SETFL, old_fd0_flags);
  744: }
  745: 
  746: static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
  747: {
  748:     struct termios tty;
  749: 
  750:     tty = oldtty;
  751:     if (!echo) {
  752:         tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
  753:                           |INLCR|IGNCR|ICRNL|IXON);
  754:         tty.c_oflag |= OPOST;
  755:         tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
  756:         tty.c_cflag &= ~(CSIZE|PARENB);
  757:         tty.c_cflag |= CS8;
  758:         tty.c_cc[VMIN] = 1;
  759:         tty.c_cc[VTIME] = 0;
  760:     }
  761:     /* if graphical mode, we allow Ctrl-C handling */
  762:     if (!stdio_allow_signal)
  763:         tty.c_lflag &= ~ISIG;
  764: 
  765:     tcsetattr (0, TCSANOW, &tty);
  766: }
  767: 
  768: static void qemu_chr_close_stdio(struct CharDriverState *chr)
  769: {
  770:     term_exit();
  771:     stdio_nb_clients--;
  772:     qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
  773:     fd_chr_close(chr);
  774: }
  775: 
  776: static int qemu_chr_open_stdio(QemuOpts *opts, CharDriverState **_chr)
  777: {
  778:     CharDriverState *chr;
  779: 
  780:     if (stdio_nb_clients >= STDIO_MAX_CLIENTS) {
  781:         return -EBUSY;
  782:     }
  783: 
  784:     if (stdio_nb_clients == 0) {
  785:         old_fd0_flags = fcntl(0, F_GETFL);
  786:         tcgetattr (0, &oldtty);
  787:         fcntl(0, F_SETFL, O_NONBLOCK);
  788:         atexit(term_exit);
  789:     }
  790: 
  791:     chr = qemu_chr_open_fd(0, 1);
  792:     chr->chr_close = qemu_chr_close_stdio;
  793:     chr->chr_set_echo = qemu_chr_set_echo_stdio;
  794:     qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
  795:     stdio_nb_clients++;
  796:     stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
  797:                                            display_type != DT_NOGRAPHIC);
  798:     qemu_chr_set_echo(chr, false);
  799: 
  800:     *_chr = chr;
  801:     return 0;
  802: }
  803: 
  804: #ifdef __sun__
  805: /* Once Solaris has openpty(), this is going to be removed. */
  806: static int openpty(int *amaster, int *aslave, char *name,
  807:                    struct termios *termp, struct winsize *winp)
  808: {
  809:         const char *slave;
  810:         int mfd = -1, sfd = -1;
  811: 
  812:         *amaster = *aslave = -1;
  813: 
  814:         mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
  815:         if (mfd < 0)
  816:                 goto err;
  817: 
  818:         if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
  819:                 goto err;
  820: 
  821:         if ((slave = ptsname(mfd)) == NULL)
  822:                 goto err;
  823: 
  824:         if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
  825:                 goto err;
  826: 
  827:         if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
  828:             (termp != NULL && tcgetattr(sfd, termp) < 0))
  829:                 goto err;
  830: 
  831:         if (amaster)
  832:                 *amaster = mfd;
  833:         if (aslave)
  834:                 *aslave = sfd;
  835:         if (winp)
  836:                 ioctl(sfd, TIOCSWINSZ, winp);
  837: 
  838:         return 0;
  839: 
  840: err:
  841:         if (sfd != -1)
  842:                 close(sfd);
  843:         close(mfd);
  844:         return -1;
  845: }
  846: 
  847: static void cfmakeraw (struct termios *termios_p)
  848: {
  849:         termios_p->c_iflag &=
  850:                 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
  851:         termios_p->c_oflag &= ~OPOST;
  852:         termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
  853:         termios_p->c_cflag &= ~(CSIZE|PARENB);
  854:         termios_p->c_cflag |= CS8;
  855: 
  856:         termios_p->c_cc[VMIN] = 0;
  857:         termios_p->c_cc[VTIME] = 0;
  858: }
  859: #endif
  860: 
  861: #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
  862:     || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
  863:     || defined(__GLIBC__)
  864: 
  865: typedef struct {
  866:     int fd;
  867:     int connected;
  868:     int polling;
  869:     int read_bytes;
  870:     QEMUTimer *timer;
  871: } PtyCharDriver;
  872: 
  873: static void pty_chr_update_read_handler(CharDriverState *chr);
  874: static void pty_chr_state(CharDriverState *chr, int connected);
  875: 
  876: static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
  877: {
  878:     PtyCharDriver *s = chr->opaque;
  879: 
  880:     if (!s->connected) {
  881:         /* guest sends data, check for (re-)connect */
  882:         pty_chr_update_read_handler(chr);
  883:         return 0;
  884:     }
  885:     return send_all(s->fd, buf, len);
  886: }
  887: 
  888: static int pty_chr_read_poll(void *opaque)
  889: {
  890:     CharDriverState *chr = opaque;
  891:     PtyCharDriver *s = chr->opaque;
  892: 
  893:     s->read_bytes = qemu_chr_can_read(chr);
  894:     return s->read_bytes;
  895: }
  896: 
  897: static void pty_chr_read(void *opaque)
  898: {
  899:     CharDriverState *chr = opaque;
  900:     PtyCharDriver *s = chr->opaque;
  901:     int size, len;
  902:     uint8_t buf[READ_BUF_LEN];
  903: 
  904:     len = sizeof(buf);
  905:     if (len > s->read_bytes)
  906:         len = s->read_bytes;
  907:     if (len == 0)
  908:         return;
  909:     size = read(s->fd, buf, len);
  910:     if ((size == -1 && errno == EIO) ||
  911:         (size == 0)) {
  912:         pty_chr_state(chr, 0);
  913:         return;
  914:     }
  915:     if (size > 0) {
  916:         pty_chr_state(chr, 1);
  917:         qemu_chr_read(chr, buf, size);
  918:     }
  919: }
  920: 
  921: static void pty_chr_update_read_handler(CharDriverState *chr)
  922: {
  923:     PtyCharDriver *s = chr->opaque;
  924: 
  925:     qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
  926:                          pty_chr_read, NULL, chr);
  927:     s->polling = 1;
  928:     /*
  929:      * Short timeout here: just need wait long enougth that qemu makes
  930:      * it through the poll loop once.  When reconnected we want a
  931:      * short timeout so we notice it almost instantly.  Otherwise
  932:      * read() gives us -EIO instantly, making pty_chr_state() reset the
  933:      * timeout to the normal (much longer) poll interval before the
  934:      * timer triggers.
  935:      */
  936:     qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 10);
  937: }
  938: 
  939: static void pty_chr_state(CharDriverState *chr, int connected)
  940: {
  941:     PtyCharDriver *s = chr->opaque;
  942: 
  943:     if (!connected) {
  944:         qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
  945:         s->connected = 0;
  946:         s->polling = 0;
  947:         /* (re-)connect poll interval for idle guests: once per second.
  948:          * We check more frequently in case the guests sends data to
  949:          * the virtual device linked to our pty. */
  950:         qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 1000);
  951:     } else {
  952:         if (!s->connected)
  953:             qemu_chr_generic_open(chr);
  954:         s->connected = 1;
  955:     }
  956: }
  957: 
  958: static void pty_chr_timer(void *opaque)
  959: {
  960:     struct CharDriverState *chr = opaque;
  961:     PtyCharDriver *s = chr->opaque;
  962: 
  963:     if (s->connected)
  964:         return;
  965:     if (s->polling) {
  966:         /* If we arrive here without polling being cleared due
  967:          * read returning -EIO, then we are (re-)connected */
  968:         pty_chr_state(chr, 1);
  969:         return;
  970:     }
  971: 
  972:     /* Next poll ... */
  973:     pty_chr_update_read_handler(chr);
  974: }
  975: 
  976: static void pty_chr_close(struct CharDriverState *chr)
  977: {
  978:     PtyCharDriver *s = chr->opaque;
  979: 
  980:     qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
  981:     close(s->fd);
  982:     qemu_del_timer(s->timer);
  983:     qemu_free_timer(s->timer);
  984:     qemu_free(s);
  985:     qemu_chr_event(chr, CHR_EVENT_CLOSED);
  986: }
  987: 
  988: static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr)
  989: {
  990:     CharDriverState *chr;
  991:     PtyCharDriver *s;
  992:     struct termios tty;
  993:     int slave_fd, len;
  994: #if defined(__OpenBSD__) || defined(__DragonFly__)
  995:     char pty_name[PATH_MAX];
  996: #define q_ptsname(x) pty_name
  997: #else
  998:     char *pty_name = NULL;
  999: #define q_ptsname(x) ptsname(x)
 1000: #endif
 1001: 
 1002:     chr = qemu_mallocz(sizeof(CharDriverState));
 1003:     s = qemu_mallocz(sizeof(PtyCharDriver));
 1004: 
 1005:     if (openpty(&s->fd, &slave_fd, pty_name, NULL, NULL) < 0) {
 1006:         return -errno;
 1007:     }
 1008: 
 1009:     /* Set raw attributes on the pty. */
 1010:     tcgetattr(slave_fd, &tty);
 1011:     cfmakeraw(&tty);
 1012:     tcsetattr(slave_fd, TCSAFLUSH, &tty);
 1013:     close(slave_fd);
 1014: 
 1015:     len = strlen(q_ptsname(s->fd)) + 5;
 1016:     chr->filename = qemu_malloc(len);
 1017:     snprintf(chr->filename, len, "pty:%s", q_ptsname(s->fd));
 1018:     qemu_opt_set(opts, "path", q_ptsname(s->fd));
 1019:     fprintf(stderr, "char device redirected to %s\n", q_ptsname(s->fd));
 1020: 
 1021:     chr->opaque = s;
 1022:     chr->chr_write = pty_chr_write;
 1023:     chr->chr_update_read_handler = pty_chr_update_read_handler;
 1024:     chr->chr_close = pty_chr_close;
 1025: 
 1026:     s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr);
 1027: 
 1028:     *_chr = chr;
 1029:     return 0;
 1030: }
 1031: 
 1032: static void tty_serial_init(int fd, int speed,
 1033:                             int parity, int data_bits, int stop_bits)
 1034: {
 1035:     struct termios tty;
 1036:     speed_t spd;
 1037: 
 1038: #if 0
 1039:     printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
 1040:            speed, parity, data_bits, stop_bits);
 1041: #endif
 1042:     tcgetattr (fd, &tty);
 1043: 
 1044: #define check_speed(val) if (speed <= val) { spd = B##val; break; }
 1045:     speed = speed * 10 / 11;
 1046:     do {
 1047:         check_speed(50);
 1048:         check_speed(75);
 1049:         check_speed(110);
 1050:         check_speed(134);
 1051:         check_speed(150);
 1052:         check_speed(200);
 1053:         check_speed(300);
 1054:         check_speed(600);
 1055:         check_speed(1200);
 1056:         check_speed(1800);
 1057:         check_speed(2400);
 1058:         check_speed(4800);
 1059:         check_speed(9600);
 1060:         check_speed(19200);
 1061:         check_speed(38400);
 1062:         /* Non-Posix values follow. They may be unsupported on some systems. */
 1063:         check_speed(57600);
 1064:         check_speed(115200);
 1065: #ifdef B230400
 1066:         check_speed(230400);
 1067: #endif
 1068: #ifdef B460800
 1069:         check_speed(460800);
 1070: #endif
 1071: #ifdef B500000
 1072:         check_speed(500000);
 1073: #endif
 1074: #ifdef B576000
 1075:         check_speed(576000);
 1076: #endif
 1077: #ifdef B921600
 1078:         check_speed(921600);
 1079: #endif
 1080: #ifdef B1000000
 1081:         check_speed(1000000);
 1082: #endif
 1083: #ifdef B1152000
 1084:         check_speed(1152000);
 1085: #endif
 1086: #ifdef B1500000
 1087:         check_speed(1500000);
 1088: #endif
 1089: #ifdef B2000000
 1090:         check_speed(2000000);
 1091: #endif
 1092: #ifdef B2500000
 1093:         check_speed(2500000);
 1094: #endif
 1095: #ifdef B3000000
 1096:         check_speed(3000000);
 1097: #endif
 1098: #ifdef B3500000
 1099:         check_speed(3500000);
 1100: #endif
 1101: #ifdef B4000000
 1102:         check_speed(4000000);
 1103: #endif
 1104:         spd = B115200;
 1105:     } while (0);
 1106: 
 1107:     cfsetispeed(&tty, spd);
 1108:     cfsetospeed(&tty, spd);
 1109: 
 1110:     tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
 1111:                           |INLCR|IGNCR|ICRNL|IXON);
 1112:     tty.c_oflag |= OPOST;
 1113:     tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
 1114:     tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
 1115:     switch(data_bits) {
 1116:     default:
 1117:     case 8:
 1118:         tty.c_cflag |= CS8;
 1119:         break;
 1120:     case 7:
 1121:         tty.c_cflag |= CS7;
 1122:         break;
 1123:     case 6:
 1124:         tty.c_cflag |= CS6;
 1125:         break;
 1126:     case 5:
 1127:         tty.c_cflag |= CS5;
 1128:         break;
 1129:     }
 1130:     switch(parity) {
 1131:     default:
 1132:     case 'N':
 1133:         break;
 1134:     case 'E':
 1135:         tty.c_cflag |= PARENB;
 1136:         break;
 1137:     case 'O':
 1138:         tty.c_cflag |= PARENB | PARODD;
 1139:         break;
 1140:     }
 1141:     if (stop_bits == 2)
 1142:         tty.c_cflag |= CSTOPB;
 1143: 
 1144:     tcsetattr (fd, TCSANOW, &tty);
 1145: }
 1146: 
 1147: static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
 1148: {
 1149:     FDCharDriver *s = chr->opaque;
 1150: 
 1151:     switch(cmd) {
 1152:     case CHR_IOCTL_SERIAL_SET_PARAMS:
 1153:         {
 1154:             QEMUSerialSetParams *ssp = arg;
 1155:             tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
 1156:                             ssp->data_bits, ssp->stop_bits);
 1157:         }
 1158:         break;
 1159:     case CHR_IOCTL_SERIAL_SET_BREAK:
 1160:         {
 1161:             int enable = *(int *)arg;
 1162:             if (enable)
 1163:                 tcsendbreak(s->fd_in, 1);
 1164:         }
 1165:         break;
 1166:     case CHR_IOCTL_SERIAL_GET_TIOCM:
 1167:         {
 1168:             int sarg = 0;
 1169:             int *targ = (int *)arg;
 1170:             ioctl(s->fd_in, TIOCMGET, &sarg);
 1171:             *targ = 0;
 1172:             if (sarg & TIOCM_CTS)
 1173:                 *targ |= CHR_TIOCM_CTS;
 1174:             if (sarg & TIOCM_CAR)
 1175:                 *targ |= CHR_TIOCM_CAR;
 1176:             if (sarg & TIOCM_DSR)
 1177:                 *targ |= CHR_TIOCM_DSR;
 1178:             if (sarg & TIOCM_RI)
 1179:                 *targ |= CHR_TIOCM_RI;
 1180:             if (sarg & TIOCM_DTR)
 1181:                 *targ |= CHR_TIOCM_DTR;
 1182:             if (sarg & TIOCM_RTS)
 1183:                 *targ |= CHR_TIOCM_RTS;
 1184:         }
 1185:         break;
 1186:     case CHR_IOCTL_SERIAL_SET_TIOCM:
 1187:         {
 1188:             int sarg = *(int *)arg;
 1189:             int targ = 0;
 1190:             ioctl(s->fd_in, TIOCMGET, &targ);
 1191:             targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
 1192:                      | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
 1193:             if (sarg & CHR_TIOCM_CTS)
 1194:                 targ |= TIOCM_CTS;
 1195:             if (sarg & CHR_TIOCM_CAR)
 1196:                 targ |= TIOCM_CAR;
 1197:             if (sarg & CHR_TIOCM_DSR)
 1198:                 targ |= TIOCM_DSR;
 1199:             if (sarg & CHR_TIOCM_RI)
 1200:                 targ |= TIOCM_RI;
 1201:             if (sarg & CHR_TIOCM_DTR)
 1202:                 targ |= TIOCM_DTR;
 1203:             if (sarg & CHR_TIOCM_RTS)
 1204:                 targ |= TIOCM_RTS;
 1205:             ioctl(s->fd_in, TIOCMSET, &targ);
 1206:         }
 1207:         break;
 1208:     default:
 1209:         return -ENOTSUP;
 1210:     }
 1211:     return 0;
 1212: }
 1213: 
 1214: static void qemu_chr_close_tty(CharDriverState *chr)
 1215: {
 1216:     FDCharDriver *s = chr->opaque;
 1217:     int fd = -1;
 1218: 
 1219:     if (s) {
 1220:         fd = s->fd_in;
 1221:     }
 1222: 
 1223:     fd_chr_close(chr);
 1224: 
 1225:     if (fd >= 0) {
 1226:         close(fd);
 1227:     }
 1228: }
 1229: 
 1230: static int qemu_chr_open_tty(QemuOpts *opts, CharDriverState **_chr)
 1231: {
 1232:     const char *filename = qemu_opt_get(opts, "path");
 1233:     CharDriverState *chr;
 1234:     int fd;
 1235: 
 1236:     TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK));
 1237:     if (fd < 0) {
 1238:         return -errno;
 1239:     }
 1240:     tty_serial_init(fd, 115200, 'N', 8, 1);
 1241:     chr = qemu_chr_open_fd(fd, fd);
 1242:     chr->chr_ioctl = tty_serial_ioctl;
 1243:     chr->chr_close = qemu_chr_close_tty;
 1244: 
 1245:     *_chr = chr;
 1246:     return 0;
 1247: }
 1248: #else  /* ! __linux__ && ! __sun__ */
 1249: static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr)
 1250: {
 1251:     return -ENOTSUP;
 1252: }
 1253: #endif /* __linux__ || __sun__ */
 1254: 
 1255: #if defined(__linux__)
 1256: typedef struct {
 1257:     int fd;
 1258:     int mode;
 1259: } ParallelCharDriver;
 1260: 
 1261: static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
 1262: {
 1263:     if (s->mode != mode) {
 1264: 	int m = mode;
 1265:         if (ioctl(s->fd, PPSETMODE, &m) < 0)
 1266:             return 0;
 1267: 	s->mode = mode;
 1268:     }
 1269:     return 1;
 1270: }
 1271: 
 1272: static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
 1273: {
 1274:     ParallelCharDriver *drv = chr->opaque;
 1275:     int fd = drv->fd;
 1276:     uint8_t b;
 1277: 
 1278:     switch(cmd) {
 1279:     case CHR_IOCTL_PP_READ_DATA:
 1280:         if (ioctl(fd, PPRDATA, &b) < 0)
 1281:             return -ENOTSUP;
 1282:         *(uint8_t *)arg = b;
 1283:         break;
 1284:     case CHR_IOCTL_PP_WRITE_DATA:
 1285:         b = *(uint8_t *)arg;
 1286:         if (ioctl(fd, PPWDATA, &b) < 0)
 1287:             return -ENOTSUP;
 1288:         break;
 1289:     case CHR_IOCTL_PP_READ_CONTROL:
 1290:         if (ioctl(fd, PPRCONTROL, &b) < 0)
 1291:             return -ENOTSUP;
 1292: 	/* Linux gives only the lowest bits, and no way to know data
 1293: 	   direction! For better compatibility set the fixed upper
 1294: 	   bits. */
 1295:         *(uint8_t *)arg = b | 0xc0;
 1296:         break;
 1297:     case CHR_IOCTL_PP_WRITE_CONTROL:
 1298:         b = *(uint8_t *)arg;
 1299:         if (ioctl(fd, PPWCONTROL, &b) < 0)
 1300:             return -ENOTSUP;
 1301:         break;
 1302:     case CHR_IOCTL_PP_READ_STATUS:
 1303:         if (ioctl(fd, PPRSTATUS, &b) < 0)
 1304:             return -ENOTSUP;
 1305:         *(uint8_t *)arg = b;
 1306:         break;
 1307:     case CHR_IOCTL_PP_DATA_DIR:
 1308:         if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
 1309:             return -ENOTSUP;
 1310:         break;
 1311:     case CHR_IOCTL_PP_EPP_READ_ADDR:
 1312: 	if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
 1313: 	    struct ParallelIOArg *parg = arg;
 1314: 	    int n = read(fd, parg->buffer, parg->count);
 1315: 	    if (n != parg->count) {
 1316: 		return -EIO;
 1317: 	    }
 1318: 	}
 1319:         break;
 1320:     case CHR_IOCTL_PP_EPP_READ:
 1321: 	if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
 1322: 	    struct ParallelIOArg *parg = arg;
 1323: 	    int n = read(fd, parg->buffer, parg->count);
 1324: 	    if (n != parg->count) {
 1325: 		return -EIO;
 1326: 	    }
 1327: 	}
 1328:         break;
 1329:     case CHR_IOCTL_PP_EPP_WRITE_ADDR:
 1330: 	if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
 1331: 	    struct ParallelIOArg *parg = arg;
 1332: 	    int n = write(fd, parg->buffer, parg->count);
 1333: 	    if (n != parg->count) {
 1334: 		return -EIO;
 1335: 	    }
 1336: 	}
 1337:         break;
 1338:     case CHR_IOCTL_PP_EPP_WRITE:
 1339: 	if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
 1340: 	    struct ParallelIOArg *parg = arg;
 1341: 	    int n = write(fd, parg->buffer, parg->count);
 1342: 	    if (n != parg->count) {
 1343: 		return -EIO;
 1344: 	    }
 1345: 	}
 1346:         break;
 1347:     default:
 1348:         return -ENOTSUP;
 1349:     }
 1350:     return 0;
 1351: }
 1352: 
 1353: static void pp_close(CharDriverState *chr)
 1354: {
 1355:     ParallelCharDriver *drv = chr->opaque;
 1356:     int fd = drv->fd;
 1357: 
 1358:     pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
 1359:     ioctl(fd, PPRELEASE);
 1360:     close(fd);
 1361:     qemu_free(drv);
 1362:     qemu_chr_event(chr, CHR_EVENT_CLOSED);
 1363: }
 1364: 
 1365: static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr)
 1366: {
 1367:     const char *filename = qemu_opt_get(opts, "path");
 1368:     CharDriverState *chr;
 1369:     ParallelCharDriver *drv;
 1370:     int fd;
 1371: 
 1372:     TFR(fd = open(filename, O_RDWR));
 1373:     if (fd < 0) {
 1374:         return -errno;
 1375:     }
 1376: 
 1377:     if (ioctl(fd, PPCLAIM) < 0) {
 1378:         close(fd);
 1379:         return -errno;
 1380:     }
 1381: 
 1382:     drv = qemu_mallocz(sizeof(ParallelCharDriver));
 1383:     drv->fd = fd;
 1384:     drv->mode = IEEE1284_MODE_COMPAT;
 1385: 
 1386:     chr = qemu_mallocz(sizeof(CharDriverState));
 1387:     chr->chr_write = null_chr_write;
 1388:     chr->chr_ioctl = pp_ioctl;
 1389:     chr->chr_close = pp_close;
 1390:     chr->opaque = drv;
 1391: 
 1392:     qemu_chr_generic_open(chr);
 1393: 
 1394:     *_chr = chr;
 1395:     return 0;
 1396: }
 1397: #endif /* __linux__ */
 1398: 
 1399: #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
 1400: static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
 1401: {
 1402:     int fd = (int)(intptr_t)chr->opaque;
 1403:     uint8_t b;
 1404: 
 1405:     switch(cmd) {
 1406:     case CHR_IOCTL_PP_READ_DATA:
 1407:         if (ioctl(fd, PPIGDATA, &b) < 0)
 1408:             return -ENOTSUP;
 1409:         *(uint8_t *)arg = b;
 1410:         break;
 1411:     case CHR_IOCTL_PP_WRITE_DATA:
 1412:         b = *(uint8_t *)arg;
 1413:         if (ioctl(fd, PPISDATA, &b) < 0)
 1414:             return -ENOTSUP;
 1415:         break;
 1416:     case CHR_IOCTL_PP_READ_CONTROL:
 1417:         if (ioctl(fd, PPIGCTRL, &b) < 0)
 1418:             return -ENOTSUP;
 1419:         *(uint8_t *)arg = b;
 1420:         break;
 1421:     case CHR_IOCTL_PP_WRITE_CONTROL:
 1422:         b = *(uint8_t *)arg;
 1423:         if (ioctl(fd, PPISCTRL, &b) < 0)
 1424:             return -ENOTSUP;
 1425:         break;
 1426:     case CHR_IOCTL_PP_READ_STATUS:
 1427:         if (ioctl(fd, PPIGSTATUS, &b) < 0)
 1428:             return -ENOTSUP;
 1429:         *(uint8_t *)arg = b;
 1430:         break;
 1431:     default:
 1432:         return -ENOTSUP;
 1433:     }
 1434:     return 0;
 1435: }
 1436: 
 1437: static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr)
 1438: {
 1439:     const char *filename = qemu_opt_get(opts, "path");
 1440:     CharDriverState *chr;
 1441:     int fd;
 1442: 
 1443:     fd = qemu_open(filename, O_RDWR);
 1444:     if (fd < 0) {
 1445:         return -errno;
 1446:     }
 1447: 
 1448:     chr = qemu_mallocz(sizeof(CharDriverState));
 1449:     chr->opaque = (void *)(intptr_t)fd;
 1450:     chr->chr_write = null_chr_write;
 1451:     chr->chr_ioctl = pp_ioctl;
 1452: 
 1453:     *_chr = chr;
 1454:     return 0;
 1455: }
 1456: #endif
 1457: 
 1458: #else /* _WIN32 */
 1459: 
 1460: typedef struct {
 1461:     int max_size;
 1462:     HANDLE hcom, hrecv, hsend;
 1463:     OVERLAPPED orecv, osend;
 1464:     BOOL fpipe;
 1465:     DWORD len;
 1466: } WinCharState;
 1467: 
 1468: #define NSENDBUF 2048
 1469: #define NRECVBUF 2048
 1470: #define MAXCONNECT 1
 1471: #define NTIMEOUT 5000
 1472: 
 1473: static int win_chr_poll(void *opaque);
 1474: static int win_chr_pipe_poll(void *opaque);
 1475: 
 1476: static void win_chr_close(CharDriverState *chr)
 1477: {
 1478:     WinCharState *s = chr->opaque;
 1479: 
 1480:     if (s->hsend) {
 1481:         CloseHandle(s->hsend);
 1482:         s->hsend = NULL;
 1483:     }
 1484:     if (s->hrecv) {
 1485:         CloseHandle(s->hrecv);
 1486:         s->hrecv = NULL;
 1487:     }
 1488:     if (s->hcom) {
 1489:         CloseHandle(s->hcom);
 1490:         s->hcom = NULL;
 1491:     }
 1492:     if (s->fpipe)
 1493:         qemu_del_polling_cb(win_chr_pipe_poll, chr);
 1494:     else
 1495:         qemu_del_polling_cb(win_chr_poll, chr);
 1496: 
 1497:     qemu_chr_event(chr, CHR_EVENT_CLOSED);
 1498: }
 1499: 
 1500: static int win_chr_init(CharDriverState *chr, const char *filename)
 1501: {
 1502:     WinCharState *s = chr->opaque;
 1503:     COMMCONFIG comcfg;
 1504:     COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
 1505:     COMSTAT comstat;
 1506:     DWORD size;
 1507:     DWORD err;
 1508: 
 1509:     s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
 1510:     if (!s->hsend) {
 1511:         fprintf(stderr, "Failed CreateEvent\n");
 1512:         goto fail;
 1513:     }
 1514:     s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
 1515:     if (!s->hrecv) {
 1516:         fprintf(stderr, "Failed CreateEvent\n");
 1517:         goto fail;
 1518:     }
 1519: 
 1520:     s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
 1521:                       OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
 1522:     if (s->hcom == INVALID_HANDLE_VALUE) {
 1523:         fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
 1524:         s->hcom = NULL;
 1525:         goto fail;
 1526:     }
 1527: 
 1528:     if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
 1529:         fprintf(stderr, "Failed SetupComm\n");
 1530:         goto fail;
 1531:     }
 1532: 
 1533:     ZeroMemory(&comcfg, sizeof(COMMCONFIG));
 1534:     size = sizeof(COMMCONFIG);
 1535:     GetDefaultCommConfig(filename, &comcfg, &size);
 1536:     comcfg.dcb.DCBlength = sizeof(DCB);
 1537:     CommConfigDialog(filename, NULL, &comcfg);
 1538: 
 1539:     if (!SetCommState(s->hcom, &comcfg.dcb)) {
 1540:         fprintf(stderr, "Failed SetCommState\n");
 1541:         goto fail;
 1542:     }
 1543: 
 1544:     if (!SetCommMask(s->hcom, EV_ERR)) {
 1545:         fprintf(stderr, "Failed SetCommMask\n");
 1546:         goto fail;
 1547:     }
 1548: 
 1549:     cto.ReadIntervalTimeout = MAXDWORD;
 1550:     if (!SetCommTimeouts(s->hcom, &cto)) {
 1551:         fprintf(stderr, "Failed SetCommTimeouts\n");
 1552:         goto fail;
 1553:     }
 1554: 
 1555:     if (!ClearCommError(s->hcom, &err, &comstat)) {
 1556:         fprintf(stderr, "Failed ClearCommError\n");
 1557:         goto fail;
 1558:     }
 1559:     qemu_add_polling_cb(win_chr_poll, chr);
 1560:     return 0;
 1561: 
 1562:  fail:
 1563:     win_chr_close(chr);
 1564:     return -1;
 1565: }
 1566: 
 1567: static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
 1568: {
 1569:     WinCharState *s = chr->opaque;
 1570:     DWORD len, ret, size, err;
 1571: 
 1572:     len = len1;
 1573:     ZeroMemory(&s->osend, sizeof(s->osend));
 1574:     s->osend.hEvent = s->hsend;
 1575:     while (len > 0) {
 1576:         if (s->hsend)
 1577:             ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
 1578:         else
 1579:             ret = WriteFile(s->hcom, buf, len, &size, NULL);
 1580:         if (!ret) {
 1581:             err = GetLastError();
 1582:             if (err == ERROR_IO_PENDING) {
 1583:                 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
 1584:                 if (ret) {
 1585:                     buf += size;
 1586:                     len -= size;
 1587:                 } else {
 1588:                     break;
 1589:                 }
 1590:             } else {
 1591:                 break;
 1592:             }
 1593:         } else {
 1594:             buf += size;
 1595:             len -= size;
 1596:         }
 1597:     }
 1598:     return len1 - len;
 1599: }
 1600: 
 1601: static int win_chr_read_poll(CharDriverState *chr)
 1602: {
 1603:     WinCharState *s = chr->opaque;
 1604: 
 1605:     s->max_size = qemu_chr_can_read(chr);
 1606:     return s->max_size;
 1607: }
 1608: 
 1609: static void win_chr_readfile(CharDriverState *chr)
 1610: {
 1611:     WinCharState *s = chr->opaque;
 1612:     int ret, err;
 1613:     uint8_t buf[READ_BUF_LEN];
 1614:     DWORD size;
 1615: 
 1616:     ZeroMemory(&s->orecv, sizeof(s->orecv));
 1617:     s->orecv.hEvent = s->hrecv;
 1618:     ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
 1619:     if (!ret) {
 1620:         err = GetLastError();
 1621:         if (err == ERROR_IO_PENDING) {
 1622:             ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
 1623:         }
 1624:     }
 1625: 
 1626:     if (size > 0) {
 1627:         qemu_chr_read(chr, buf, size);
 1628:     }
 1629: }
 1630: 
 1631: static void win_chr_read(CharDriverState *chr)
 1632: {
 1633:     WinCharState *s = chr->opaque;
 1634: 
 1635:     if (s->len > s->max_size)
 1636:         s->len = s->max_size;
 1637:     if (s->len == 0)
 1638:         return;
 1639: 
 1640:     win_chr_readfile(chr);
 1641: }
 1642: 
 1643: static int win_chr_poll(void *opaque)
 1644: {
 1645:     CharDriverState *chr = opaque;
 1646:     WinCharState *s = chr->opaque;
 1647:     COMSTAT status;
 1648:     DWORD comerr;
 1649: 
 1650:     ClearCommError(s->hcom, &comerr, &status);
 1651:     if (status.cbInQue > 0) {
 1652:         s->len = status.cbInQue;
 1653:         win_chr_read_poll(chr);
 1654:         win_chr_read(chr);
 1655:         return 1;
 1656:     }
 1657:     return 0;
 1658: }
 1659: 
 1660: static int qemu_chr_open_win(QemuOpts *opts, CharDriverState **_chr)
 1661: {
 1662:     const char *filename = qemu_opt_get(opts, "path");
 1663:     CharDriverState *chr;
 1664:     WinCharState *s;
 1665: 
 1666:     chr = qemu_mallocz(sizeof(CharDriverState));
 1667:     s = qemu_mallocz(sizeof(WinCharState));
 1668:     chr->opaque = s;
 1669:     chr->chr_write = win_chr_write;
 1670:     chr->chr_close = win_chr_close;
 1671: 
 1672:     if (win_chr_init(chr, filename) < 0) {
 1673:         free(s);
 1674:         free(chr);
 1675:         return -EIO;
 1676:     }
 1677:     qemu_chr_generic_open(chr);
 1678: 
 1679:     *_chr = chr;
 1680:     return 0;
 1681: }
 1682: 
 1683: static int win_chr_pipe_poll(void *opaque)
 1684: {
 1685:     CharDriverState *chr = opaque;
 1686:     WinCharState *s = chr->opaque;
 1687:     DWORD size;
 1688: 
 1689:     PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
 1690:     if (size > 0) {
 1691:         s->len = size;
 1692:         win_chr_read_poll(chr);
 1693:         win_chr_read(chr);
 1694:         return 1;
 1695:     }
 1696:     return 0;
 1697: }
 1698: 
 1699: static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
 1700: {
 1701:     WinCharState *s = chr->opaque;
 1702:     OVERLAPPED ov;
 1703:     int ret;
 1704:     DWORD size;
 1705:     char openname[256];
 1706: 
 1707:     s->fpipe = TRUE;
 1708: 
 1709:     s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
 1710:     if (!s->hsend) {
 1711:         fprintf(stderr, "Failed CreateEvent\n");
 1712:         goto fail;
 1713:     }
 1714:     s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
 1715:     if (!s->hrecv) {
 1716:         fprintf(stderr, "Failed CreateEvent\n");
 1717:         goto fail;
 1718:     }
 1719: 
 1720:     snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
 1721:     s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
 1722:                               PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
 1723:                               PIPE_WAIT,
 1724:                               MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
 1725:     if (s->hcom == INVALID_HANDLE_VALUE) {
 1726:         fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
 1727:         s->hcom = NULL;
 1728:         goto fail;
 1729:     }
 1730: 
 1731:     ZeroMemory(&ov, sizeof(ov));
 1732:     ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
 1733:     ret = ConnectNamedPipe(s->hcom, &ov);
 1734:     if (ret) {
 1735:         fprintf(stderr, "Failed ConnectNamedPipe\n");
 1736:         goto fail;
 1737:     }
 1738: 
 1739:     ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
 1740:     if (!ret) {
 1741:         fprintf(stderr, "Failed GetOverlappedResult\n");
 1742:         if (ov.hEvent) {
 1743:             CloseHandle(ov.hEvent);
 1744:             ov.hEvent = NULL;
 1745:         }
 1746:         goto fail;
 1747:     }
 1748: 
 1749:     if (ov.hEvent) {
 1750:         CloseHandle(ov.hEvent);
 1751:         ov.hEvent = NULL;
 1752:     }
 1753:     qemu_add_polling_cb(win_chr_pipe_poll, chr);
 1754:     return 0;
 1755: 
 1756:  fail:
 1757:     win_chr_close(chr);
 1758:     return -1;
 1759: }
 1760: 
 1761: 
 1762: static int qemu_chr_open_win_pipe(QemuOpts *opts, CharDriverState **_chr)
 1763: {
 1764:     const char *filename = qemu_opt_get(opts, "path");
 1765:     CharDriverState *chr;
 1766:     WinCharState *s;
 1767: 
 1768:     chr = qemu_mallocz(sizeof(CharDriverState));
 1769:     s = qemu_mallocz(sizeof(WinCharState));
 1770:     chr->opaque = s;
 1771:     chr->chr_write = win_chr_write;
 1772:     chr->chr_close = win_chr_close;
 1773: 
 1774:     if (win_chr_pipe_init(chr, filename) < 0) {
 1775:         free(s);
 1776:         free(chr);
 1777:         return -EIO;
 1778:     }
 1779:     qemu_chr_generic_open(chr);
 1780: 
 1781:     *_chr = chr;
 1782:     return 0;
 1783: }
 1784: 
 1785: static int qemu_chr_open_win_file(HANDLE fd_out, CharDriverState **pchr)
 1786: {
 1787:     CharDriverState *chr;
 1788:     WinCharState *s;
 1789: 
 1790:     chr = qemu_mallocz(sizeof(CharDriverState));
 1791:     s = qemu_mallocz(sizeof(WinCharState));
 1792:     s->hcom = fd_out;
 1793:     chr->opaque = s;
 1794:     chr->chr_write = win_chr_write;
 1795:     qemu_chr_generic_open(chr);
 1796:     *pchr = chr;
 1797:     return 0;
 1798: }
 1799: 
 1800: static int qemu_chr_open_win_con(QemuOpts *opts, CharDriverState **chr)
 1801: {
 1802:     return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE), chr);
 1803: }
 1804: 
 1805: static int qemu_chr_open_win_file_out(QemuOpts *opts, CharDriverState **_chr)
 1806: {
 1807:     const char *file_out = qemu_opt_get(opts, "path");
 1808:     HANDLE fd_out;
 1809: 
 1810:     fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
 1811:                         OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
 1812:     if (fd_out == INVALID_HANDLE_VALUE) {
 1813:         return -EIO;
 1814:     }
 1815: 
 1816:     return qemu_chr_open_win_file(fd_out, _chr);
 1817: }
 1818: #endif /* !_WIN32 */
 1819: 
 1820: /***********************************************************/
 1821: /* UDP Net console */
 1822: 
 1823: typedef struct {
 1824:     int fd;
 1825:     uint8_t buf[READ_BUF_LEN];
 1826:     int bufcnt;
 1827:     int bufptr;
 1828:     int max_size;
 1829: } NetCharDriver;
 1830: 
 1831: static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 1832: {
 1833:     NetCharDriver *s = chr->opaque;
 1834: 
 1835:     return send(s->fd, (const void *)buf, len, 0);
 1836: }
 1837: 
 1838: static int udp_chr_read_poll(void *opaque)
 1839: {
 1840:     CharDriverState *chr = opaque;
 1841:     NetCharDriver *s = chr->opaque;
 1842: 
 1843:     s->max_size = qemu_chr_can_read(chr);
 1844: 
 1845:     /* If there were any stray characters in the queue process them
 1846:      * first
 1847:      */
 1848:     while (s->max_size > 0 && s->bufptr < s->bufcnt) {
 1849:         qemu_chr_read(chr, &s->buf[s->bufptr], 1);
 1850:         s->bufptr++;
 1851:         s->max_size = qemu_chr_can_read(chr);
 1852:     }
 1853:     return s->max_size;
 1854: }
 1855: 
 1856: static void udp_chr_read(void *opaque)
 1857: {
 1858:     CharDriverState *chr = opaque;
 1859:     NetCharDriver *s = chr->opaque;
 1860: 
 1861:     if (s->max_size == 0)
 1862:         return;
 1863:     s->bufcnt = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0);
 1864:     s->bufptr = s->bufcnt;
 1865:     if (s->bufcnt <= 0)
 1866:         return;
 1867: 
 1868:     s->bufptr = 0;
 1869:     while (s->max_size > 0 && s->bufptr < s->bufcnt) {
 1870:         qemu_chr_read(chr, &s->buf[s->bufptr], 1);
 1871:         s->bufptr++;
 1872:         s->max_size = qemu_chr_can_read(chr);
 1873:     }
 1874: }
 1875: 
 1876: static void udp_chr_update_read_handler(CharDriverState *chr)
 1877: {
 1878:     NetCharDriver *s = chr->opaque;
 1879: 
 1880:     if (s->fd >= 0) {
 1881:         qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
 1882:                              udp_chr_read, NULL, chr);
 1883:     }
 1884: }
 1885: 
 1886: static void udp_chr_close(CharDriverState *chr)
 1887: {
 1888:     NetCharDriver *s = chr->opaque;
 1889:     if (s->fd >= 0) {
 1890:         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
 1891:         closesocket(s->fd);
 1892:     }
 1893:     qemu_free(s);
 1894:     qemu_chr_event(chr, CHR_EVENT_CLOSED);
 1895: }
 1896: 
 1897: static int qemu_chr_open_udp(QemuOpts *opts, CharDriverState **_chr)
 1898: {
 1899:     CharDriverState *chr = NULL;
 1900:     NetCharDriver *s = NULL;
 1901:     int fd = -1;
 1902:     int ret;
 1903: 
 1904:     chr = qemu_mallocz(sizeof(CharDriverState));
 1905:     s = qemu_mallocz(sizeof(NetCharDriver));
 1906: 
 1907:     fd = inet_dgram_opts(opts);
 1908:     if (fd < 0) {
 1909:         fprintf(stderr, "inet_dgram_opts failed\n");
 1910:         ret = -errno;
 1911:         goto return_err;
 1912:     }
 1913: 
 1914:     s->fd = fd;
 1915:     s->bufcnt = 0;
 1916:     s->bufptr = 0;
 1917:     chr->opaque = s;
 1918:     chr->chr_write = udp_chr_write;
 1919:     chr->chr_update_read_handler = udp_chr_update_read_handler;
 1920:     chr->chr_close = udp_chr_close;
 1921: 
 1922:     *_chr = chr;
 1923:     return 0;
 1924: 
 1925: return_err:
 1926:     qemu_free(chr);
 1927:     qemu_free(s);
 1928:     if (fd >= 0) {
 1929:         closesocket(fd);
 1930:     }
 1931:     return ret;
 1932: }
 1933: 
 1934: /***********************************************************/
 1935: /* TCP Net console */
 1936: 
 1937: typedef struct {
 1938:     int fd, listen_fd;
 1939:     int connected;
 1940:     int max_size;
 1941:     int do_telnetopt;
 1942:     int do_nodelay;
 1943:     int is_unix;
 1944:     int msgfd;
 1945: } TCPCharDriver;
 1946: 
 1947: static void tcp_chr_accept(void *opaque);
 1948: 
 1949: static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 1950: {
 1951:     TCPCharDriver *s = chr->opaque;
 1952:     if (s->connected) {
 1953:         return send_all(s->fd, buf, len);
 1954:     } else {
 1955:         /* XXX: indicate an error ? */
 1956:         return len;
 1957:     }
 1958: }
 1959: 
 1960: static int tcp_chr_read_poll(void *opaque)
 1961: {
 1962:     CharDriverState *chr = opaque;
 1963:     TCPCharDriver *s = chr->opaque;
 1964:     if (!s->connected)
 1965:         return 0;
 1966:     s->max_size = qemu_chr_can_read(chr);
 1967:     return s->max_size;
 1968: }
 1969: 
 1970: #define IAC 255
 1971: #define IAC_BREAK 243
 1972: static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
 1973:                                       TCPCharDriver *s,
 1974:                                       uint8_t *buf, int *size)
 1975: {
 1976:     /* Handle any telnet client's basic IAC options to satisfy char by
 1977:      * char mode with no echo.  All IAC options will be removed from
 1978:      * the buf and the do_telnetopt variable will be used to track the
 1979:      * state of the width of the IAC information.
 1980:      *
 1981:      * IAC commands come in sets of 3 bytes with the exception of the
 1982:      * "IAC BREAK" command and the double IAC.
 1983:      */
 1984: 
 1985:     int i;
 1986:     int j = 0;
 1987: 
 1988:     for (i = 0; i < *size; i++) {
 1989:         if (s->do_telnetopt > 1) {
 1990:             if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
 1991:                 /* Double IAC means send an IAC */
 1992:                 if (j != i)
 1993:                     buf[j] = buf[i];
 1994:                 j++;
 1995:                 s->do_telnetopt = 1;
 1996:             } else {
 1997:                 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
 1998:                     /* Handle IAC break commands by sending a serial break */
 1999:                     qemu_chr_event(chr, CHR_EVENT_BREAK);
 2000:                     s->do_telnetopt++;
 2001:                 }
 2002:                 s->do_telnetopt++;
 2003:             }
 2004:             if (s->do_telnetopt >= 4) {
 2005:                 s->do_telnetopt = 1;
 2006:             }
 2007:         } else {
 2008:             if ((unsigned char)buf[i] == IAC) {
 2009:                 s->do_telnetopt = 2;
 2010:             } else {
 2011:                 if (j != i)
 2012:                     buf[j] = buf[i];
 2013:                 j++;
 2014:             }
 2015:         }
 2016:     }
 2017:     *size = j;
 2018: }
 2019: 
 2020: static int tcp_get_msgfd(CharDriverState *chr)
 2021: {
 2022:     TCPCharDriver *s = chr->opaque;
 2023:     int fd = s->msgfd;
 2024:     s->msgfd = -1;
 2025:     return fd;
 2026: }
 2027: 
 2028: #ifndef _WIN32
 2029: static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
 2030: {
 2031:     TCPCharDriver *s = chr->opaque;
 2032:     struct cmsghdr *cmsg;
 2033: 
 2034:     for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
 2035:         int fd;
 2036: 
 2037:         if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
 2038:             cmsg->cmsg_level != SOL_SOCKET ||
 2039:             cmsg->cmsg_type != SCM_RIGHTS)
 2040:             continue;
 2041: 
 2042:         fd = *((int *)CMSG_DATA(cmsg));
 2043:         if (fd < 0)
 2044:             continue;
 2045: 
 2046:         if (s->msgfd != -1)
 2047:             close(s->msgfd);
 2048:         s->msgfd = fd;
 2049:     }
 2050: }
 2051: 
 2052: static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
 2053: {
 2054:     TCPCharDriver *s = chr->opaque;
 2055:     struct msghdr msg = { NULL, };
 2056:     struct iovec iov[1];
 2057:     union {
 2058:         struct cmsghdr cmsg;
 2059:         char control[CMSG_SPACE(sizeof(int))];
 2060:     } msg_control;
 2061:     ssize_t ret;
 2062: 
 2063:     iov[0].iov_base = buf;
 2064:     iov[0].iov_len = len;
 2065: 
 2066:     msg.msg_iov = iov;
 2067:     msg.msg_iovlen = 1;
 2068:     msg.msg_control = &msg_control;
 2069:     msg.msg_controllen = sizeof(msg_control);
 2070: 
 2071:     ret = recvmsg(s->fd, &msg, 0);
 2072:     if (ret > 0 && s->is_unix)
 2073:         unix_process_msgfd(chr, &msg);
 2074: 
 2075:     return ret;
 2076: }
 2077: #else
 2078: static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
 2079: {
 2080:     TCPCharDriver *s = chr->opaque;
 2081:     return qemu_recv(s->fd, buf, len, 0);
 2082: }
 2083: #endif
 2084: 
 2085: static void tcp_chr_read(void *opaque)
 2086: {
 2087:     CharDriverState *chr = opaque;
 2088:     TCPCharDriver *s = chr->opaque;
 2089:     uint8_t buf[READ_BUF_LEN];
 2090:     int len, size;
 2091: 
 2092:     if (!s->connected || s->max_size <= 0)
 2093:         return;
 2094:     len = sizeof(buf);
 2095:     if (len > s->max_size)
 2096:         len = s->max_size;
 2097:     size = tcp_chr_recv(chr, (void *)buf, len);
 2098:     if (size == 0) {
 2099:         /* connection closed */
 2100:         s->connected = 0;
 2101:         if (s->listen_fd >= 0) {
 2102:             qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
 2103:         }
 2104:         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
 2105:         closesocket(s->fd);
 2106:         s->fd = -1;
 2107:         qemu_chr_event(chr, CHR_EVENT_CLOSED);
 2108:     } else if (size > 0) {
 2109:         if (s->do_telnetopt)
 2110:             tcp_chr_process_IAC_bytes(chr, s, buf, &size);
 2111:         if (size > 0)
 2112:             qemu_chr_read(chr, buf, size);
 2113:     }
 2114: }
 2115: 
 2116: #ifndef _WIN32
 2117: CharDriverState *qemu_chr_open_eventfd(int eventfd)
 2118: {
 2119:     return qemu_chr_open_fd(eventfd, eventfd);
 2120: }
 2121: #endif
 2122: 
 2123: static void tcp_chr_connect(void *opaque)
 2124: {
 2125:     CharDriverState *chr = opaque;
 2126:     TCPCharDriver *s = chr->opaque;
 2127: 
 2128:     s->connected = 1;
 2129:     qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
 2130:                          tcp_chr_read, NULL, chr);
 2131:     qemu_chr_generic_open(chr);
 2132: }
 2133: 
 2134: #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
 2135: static void tcp_chr_telnet_init(int fd)
 2136: {
 2137:     char buf[3];
 2138:     /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
 2139:     IACSET(buf, 0xff, 0xfb, 0x01);  /* IAC WILL ECHO */
 2140:     send(fd, (char *)buf, 3, 0);
 2141:     IACSET(buf, 0xff, 0xfb, 0x03);  /* IAC WILL Suppress go ahead */
 2142:     send(fd, (char *)buf, 3, 0);
 2143:     IACSET(buf, 0xff, 0xfb, 0x00);  /* IAC WILL Binary */
 2144:     send(fd, (char *)buf, 3, 0);
 2145:     IACSET(buf, 0xff, 0xfd, 0x00);  /* IAC DO Binary */
 2146:     send(fd, (char *)buf, 3, 0);
 2147: }
 2148: 
 2149: static void socket_set_nodelay(int fd)
 2150: {
 2151:     int val = 1;
 2152:     setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
 2153: }
 2154: 
 2155: static int tcp_chr_add_client(CharDriverState *chr, int fd)
 2156: {
 2157:     TCPCharDriver *s = chr->opaque;
 2158:     if (s->fd != -1)
 2159: 	return -1;
 2160: 
 2161:     socket_set_nonblock(fd);
 2162:     if (s->do_nodelay)
 2163:         socket_set_nodelay(fd);
 2164:     s->fd = fd;
 2165:     qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
 2166:     tcp_chr_connect(chr);
 2167: 
 2168:     return 0;
 2169: }
 2170: 
 2171: static void tcp_chr_accept(void *opaque)
 2172: {
 2173:     CharDriverState *chr = opaque;
 2174:     TCPCharDriver *s = chr->opaque;
 2175:     struct sockaddr_in saddr;
 2176: #ifndef _WIN32
 2177:     struct sockaddr_un uaddr;
 2178: #endif
 2179:     struct sockaddr *addr;
 2180:     socklen_t len;
 2181:     int fd;
 2182: 
 2183:     for(;;) {
 2184: #ifndef _WIN32
 2185: 	if (s->is_unix) {
 2186: 	    len = sizeof(uaddr);
 2187: 	    addr = (struct sockaddr *)&uaddr;
 2188: 	} else
 2189: #endif
 2190: 	{
 2191: 	    len = sizeof(saddr);
 2192: 	    addr = (struct sockaddr *)&saddr;
 2193: 	}
 2194:         fd = qemu_accept(s->listen_fd, addr, &len);
 2195:         if (fd < 0 && errno != EINTR) {
 2196:             return;
 2197:         } else if (fd >= 0) {
 2198:             if (s->do_telnetopt)
 2199:                 tcp_chr_telnet_init(fd);
 2200:             break;
 2201:         }
 2202:     }
 2203:     if (tcp_chr_add_client(chr, fd) < 0)
 2204: 	close(fd);
 2205: }
 2206: 
 2207: static void tcp_chr_close(CharDriverState *chr)
 2208: {
 2209:     TCPCharDriver *s = chr->opaque;
 2210:     if (s->fd >= 0) {
 2211:         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
 2212:         closesocket(s->fd);
 2213:     }
 2214:     if (s->listen_fd >= 0) {
 2215:         qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
 2216:         closesocket(s->listen_fd);
 2217:     }
 2218:     qemu_free(s);
 2219:     qemu_chr_event(chr, CHR_EVENT_CLOSED);
 2220: }
 2221: 
 2222: static int qemu_chr_open_socket(QemuOpts *opts, CharDriverState **_chr)
 2223: {
 2224:     CharDriverState *chr = NULL;
 2225:     TCPCharDriver *s = NULL;
 2226:     int fd = -1;
 2227:     int is_listen;
 2228:     int is_waitconnect;
 2229:     int do_nodelay;
 2230:     int is_unix;
 2231:     int is_telnet;
 2232:     int ret;
 2233: 
 2234:     is_listen      = qemu_opt_get_bool(opts, "server", 0);
 2235:     is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
 2236:     is_telnet      = qemu_opt_get_bool(opts, "telnet", 0);
 2237:     do_nodelay     = !qemu_opt_get_bool(opts, "delay", 1);
 2238:     is_unix        = qemu_opt_get(opts, "path") != NULL;
 2239:     if (!is_listen)
 2240:         is_waitconnect = 0;
 2241: 
 2242:     chr = qemu_mallocz(sizeof(CharDriverState));
 2243:     s = qemu_mallocz(sizeof(TCPCharDriver));
 2244: 
 2245:     if (is_unix) {
 2246:         if (is_listen) {
 2247:             fd = unix_listen_opts(opts);
 2248:         } else {
 2249:             fd = unix_connect_opts(opts);
 2250:         }
 2251:     } else {
 2252:         if (is_listen) {
 2253:             fd = inet_listen_opts(opts, 0);
 2254:         } else {
 2255:             fd = inet_connect_opts(opts);
 2256:         }
 2257:     }
 2258:     if (fd < 0) {
 2259:         ret = -errno;
 2260:         goto fail;
 2261:     }
 2262: 
 2263:     if (!is_waitconnect)
 2264:         socket_set_nonblock(fd);
 2265: 
 2266:     s->connected = 0;
 2267:     s->fd = -1;
 2268:     s->listen_fd = -1;
 2269:     s->msgfd = -1;
 2270:     s->is_unix = is_unix;
 2271:     s->do_nodelay = do_nodelay && !is_unix;
 2272: 
 2273:     chr->opaque = s;
 2274:     chr->chr_write = tcp_chr_write;
 2275:     chr->chr_close = tcp_chr_close;
 2276:     chr->get_msgfd = tcp_get_msgfd;
 2277:     chr->chr_add_client = tcp_chr_add_client;
 2278: 
 2279:     if (is_listen) {
 2280:         s->listen_fd = fd;
 2281:         qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
 2282:         if (is_telnet)
 2283:             s->do_telnetopt = 1;
 2284: 
 2285:     } else {
 2286:         s->connected = 1;
 2287:         s->fd = fd;
 2288:         socket_set_nodelay(fd);
 2289:         tcp_chr_connect(chr);
 2290:     }
 2291: 
 2292:     /* for "info chardev" monitor command */
 2293:     chr->filename = qemu_malloc(256);
 2294:     if (is_unix) {
 2295:         snprintf(chr->filename, 256, "unix:%s%s",
 2296:                  qemu_opt_get(opts, "path"),
 2297:                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
 2298:     } else if (is_telnet) {
 2299:         snprintf(chr->filename, 256, "telnet:%s:%s%s",
 2300:                  qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
 2301:                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
 2302:     } else {
 2303:         snprintf(chr->filename, 256, "tcp:%s:%s%s",
 2304:                  qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
 2305:                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
 2306:     }
 2307: 
 2308:     if (is_listen && is_waitconnect) {
 2309:         printf("QEMU waiting for connection on: %s\n",
 2310:                chr->filename);
 2311:         tcp_chr_accept(chr);
 2312:         socket_set_nonblock(s->listen_fd);
 2313:     }
 2314: 
 2315:     *_chr = chr;
 2316:     return 0;
 2317: 
 2318:  fail:
 2319:     if (fd >= 0)
 2320:         closesocket(fd);
 2321:     qemu_free(s);
 2322:     qemu_free(chr);
 2323:     return ret;
 2324: }
 2325: 
 2326: /***********************************************************/
 2327: /* Memory chardev */
 2328: typedef struct {
 2329:     size_t outbuf_size;
 2330:     size_t outbuf_capacity;
 2331:     uint8_t *outbuf;
 2332: } MemoryDriver;
 2333: 
 2334: static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 2335: {
 2336:     MemoryDriver *d = chr->opaque;
 2337: 
 2338:     /* TODO: the QString implementation has the same code, we should
 2339:      * introduce a generic way to do this in cutils.c */
 2340:     if (d->outbuf_capacity < d->outbuf_size + len) {
 2341:         /* grow outbuf */
 2342:         d->outbuf_capacity += len;
 2343:         d->outbuf_capacity *= 2;
 2344:         d->outbuf = qemu_realloc(d->outbuf, d->outbuf_capacity);
 2345:     }
 2346: 
 2347:     memcpy(d->outbuf + d->outbuf_size, buf, len);
 2348:     d->outbuf_size += len;
 2349: 
 2350:     return len;
 2351: }
 2352: 
 2353: void qemu_chr_init_mem(CharDriverState *chr)
 2354: {
 2355:     MemoryDriver *d;
 2356: 
 2357:     d = qemu_malloc(sizeof(*d));
 2358:     d->outbuf_size = 0;
 2359:     d->outbuf_capacity = 4096;
 2360:     d->outbuf = qemu_mallocz(d->outbuf_capacity);
 2361: 
 2362:     memset(chr, 0, sizeof(*chr));
 2363:     chr->opaque = d;
 2364:     chr->chr_write = mem_chr_write;
 2365: }
 2366: 
 2367: QString *qemu_chr_mem_to_qs(CharDriverState *chr)
 2368: {
 2369:     MemoryDriver *d = chr->opaque;
 2370:     return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
 2371: }
 2372: 
 2373: /* NOTE: this driver can not be closed with qemu_chr_close()! */
 2374: void qemu_chr_close_mem(CharDriverState *chr)
 2375: {
 2376:     MemoryDriver *d = chr->opaque;
 2377: 
 2378:     qemu_free(d->outbuf);
 2379:     qemu_free(chr->opaque);
 2380:     chr->opaque = NULL;
 2381:     chr->chr_write = NULL;
 2382: }
 2383: 
 2384: size_t qemu_chr_mem_osize(const CharDriverState *chr)
 2385: {
 2386:     const MemoryDriver *d = chr->opaque;
 2387:     return d->outbuf_size;
 2388: }
 2389: 
 2390: QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
 2391: {
 2392:     char host[65], port[33], width[8], height[8];
 2393:     int pos;
 2394:     const char *p;
 2395:     QemuOpts *opts;
 2396: 
 2397:     opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
 2398:     if (NULL == opts)
 2399:         return NULL;
 2400: 
 2401:     if (strstart(filename, "mon:", &p)) {
 2402:         filename = p;
 2403:         qemu_opt_set(opts, "mux", "on");
 2404:     }
 2405: 
 2406:     if (strcmp(filename, "null")    == 0 ||
 2407:         strcmp(filename, "pty")     == 0 ||
 2408:         strcmp(filename, "msmouse") == 0 ||
 2409:         strcmp(filename, "braille") == 0 ||
 2410:         strcmp(filename, "stdio")   == 0) {
 2411:         qemu_opt_set(opts, "backend", filename);
 2412:         return opts;
 2413:     }
 2414:     if (strstart(filename, "vc", &p)) {
 2415:         qemu_opt_set(opts, "backend", "vc");
 2416:         if (*p == ':') {
 2417:             if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
 2418:                 /* pixels */
 2419:                 qemu_opt_set(opts, "width", width);
 2420:                 qemu_opt_set(opts, "height", height);
 2421:             } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
 2422:                 /* chars */
 2423:                 qemu_opt_set(opts, "cols", width);
 2424:                 qemu_opt_set(opts, "rows", height);
 2425:             } else {
 2426:                 goto fail;
 2427:             }
 2428:         }
 2429:         return opts;
 2430:     }
 2431:     if (strcmp(filename, "con:") == 0) {
 2432:         qemu_opt_set(opts, "backend", "console");
 2433:         return opts;
 2434:     }
 2435:     if (strstart(filename, "COM", NULL)) {
 2436:         qemu_opt_set(opts, "backend", "serial");
 2437:         qemu_opt_set(opts, "path", filename);
 2438:         return opts;
 2439:     }
 2440:     if (strstart(filename, "file:", &p)) {
 2441:         qemu_opt_set(opts, "backend", "file");
 2442:         qemu_opt_set(opts, "path", p);
 2443:         return opts;
 2444:     }
 2445:     if (strstart(filename, "pipe:", &p)) {
 2446:         qemu_opt_set(opts, "backend", "pipe");
 2447:         qemu_opt_set(opts, "path", p);
 2448:         return opts;
 2449:     }
 2450:     if (strstart(filename, "tcp:", &p) ||
 2451:         strstart(filename, "telnet:", &p)) {
 2452:         if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
 2453:             host[0] = 0;
 2454:             if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
 2455:                 goto fail;
 2456:         }
 2457:         qemu_opt_set(opts, "backend", "socket");
 2458:         qemu_opt_set(opts, "host", host);
 2459:         qemu_opt_set(opts, "port", port);
 2460:         if (p[pos] == ',') {
 2461:             if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
 2462:                 goto fail;
 2463:         }
 2464:         if (strstart(filename, "telnet:", &p))
 2465:             qemu_opt_set(opts, "telnet", "on");
 2466:         return opts;
 2467:     }
 2468:     if (strstart(filename, "udp:", &p)) {
 2469:         qemu_opt_set(opts, "backend", "udp");
 2470:         if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
 2471:             host[0] = 0;
 2472:             if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
 2473:                 goto fail;
 2474:             }
 2475:         }
 2476:         qemu_opt_set(opts, "host", host);
 2477:         qemu_opt_set(opts, "port", port);
 2478:         if (p[pos] == '@') {
 2479:             p += pos + 1;
 2480:             if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
 2481:                 host[0] = 0;
 2482:                 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
 2483:                     goto fail;
 2484:                 }
 2485:             }
 2486:             qemu_opt_set(opts, "localaddr", host);
 2487:             qemu_opt_set(opts, "localport", port);
 2488:         }
 2489:         return opts;
 2490:     }
 2491:     if (strstart(filename, "unix:", &p)) {
 2492:         qemu_opt_set(opts, "backend", "socket");
 2493:         if (qemu_opts_do_parse(opts, p, "path") != 0)
 2494:             goto fail;
 2495:         return opts;
 2496:     }
 2497:     if (strstart(filename, "/dev/parport", NULL) ||
 2498:         strstart(filename, "/dev/ppi", NULL)) {
 2499:         qemu_opt_set(opts, "backend", "parport");
 2500:         qemu_opt_set(opts, "path", filename);
 2501:         return opts;
 2502:     }
 2503:     if (strstart(filename, "/dev/", NULL)) {
 2504:         qemu_opt_set(opts, "backend", "tty");
 2505:         qemu_opt_set(opts, "path", filename);
 2506:         return opts;
 2507:     }
 2508: 
 2509: fail:
 2510:     qemu_opts_del(opts);
 2511:     return NULL;
 2512: }
 2513: 
 2514: static const struct {
 2515:     const char *name;
 2516:     int (*open)(QemuOpts *opts, CharDriverState **chr);
 2517: } backend_table[] = {
 2518:     { .name = "null",      .open = qemu_chr_open_null },
 2519:     { .name = "socket",    .open = qemu_chr_open_socket },
 2520:     { .name = "udp",       .open = qemu_chr_open_udp },
 2521:     { .name = "msmouse",   .open = qemu_chr_open_msmouse },
 2522:     { .name = "vc",        .open = text_console_init },
 2523: #ifdef _WIN32
 2524:     { .name = "file",      .open = qemu_chr_open_win_file_out },
 2525:     { .name = "pipe",      .open = qemu_chr_open_win_pipe },
 2526:     { .name = "console",   .open = qemu_chr_open_win_con },
 2527:     { .name = "serial",    .open = qemu_chr_open_win },
 2528: #else
 2529:     { .name = "file",      .open = qemu_chr_open_file_out },
 2530:     { .name = "pipe",      .open = qemu_chr_open_pipe },
 2531:     { .name = "pty",       .open = qemu_chr_open_pty },
 2532:     { .name = "stdio",     .open = qemu_chr_open_stdio },
 2533: #endif
 2534: #ifdef CONFIG_BRLAPI
 2535:     { .name = "braille",   .open = chr_baum_init },
 2536: #endif
 2537: #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
 2538:     || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
 2539:     || defined(__FreeBSD_kernel__)
 2540:     { .name = "tty",       .open = qemu_chr_open_tty },
 2541: #endif
 2542: #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
 2543:     || defined(__FreeBSD_kernel__)
 2544:     { .name = "parport",   .open = qemu_chr_open_pp },
 2545: #endif
 2546: #ifdef CONFIG_SPICE
 2547:     { .name = "spicevmc",     .open = qemu_chr_open_spice },
 2548: #endif
 2549: };
 2550: 
 2551: CharDriverState *qemu_chr_open_opts(QemuOpts *opts,
 2552:                                     void (*init)(struct CharDriverState *s))
 2553: {
 2554:     CharDriverState *chr;
 2555:     int i;
 2556:     int ret;
 2557: 
 2558:     if (qemu_opts_id(opts) == NULL) {
 2559:         fprintf(stderr, "chardev: no id specified\n");
 2560:         return NULL;
 2561:     }
 2562: 
 2563:     if (qemu_opt_get(opts, "backend") == NULL) {
 2564:         fprintf(stderr, "chardev: \"%s\" missing backend\n",
 2565:                 qemu_opts_id(opts));
 2566:         return NULL;
 2567:     }
 2568:     for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
 2569:         if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
 2570:             break;
 2571:     }
 2572:     if (i == ARRAY_SIZE(backend_table)) {
 2573:         fprintf(stderr, "chardev: backend \"%s\" not found\n",
 2574:                 qemu_opt_get(opts, "backend"));
 2575:         return NULL;
 2576:     }
 2577: 
 2578:     ret = backend_table[i].open(opts, &chr);
 2579:     if (ret < 0) {
 2580:         fprintf(stderr, "chardev: opening backend \"%s\" failed: %s\n",
 2581:                 qemu_opt_get(opts, "backend"), strerror(-ret));
 2582:         return NULL;
 2583:     }
 2584: 
 2585:     if (!chr->filename)
 2586:         chr->filename = qemu_strdup(qemu_opt_get(opts, "backend"));
 2587:     chr->init = init;
 2588:     QTAILQ_INSERT_TAIL(&chardevs, chr, next);
 2589: 
 2590:     if (qemu_opt_get_bool(opts, "mux", 0)) {
 2591:         CharDriverState *base = chr;
 2592:         int len = strlen(qemu_opts_id(opts)) + 6;
 2593:         base->label = qemu_malloc(len);
 2594:         snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
 2595:         chr = qemu_chr_open_mux(base);
 2596:         chr->filename = base->filename;
 2597:         chr->avail_connections = MAX_MUX;
 2598:         QTAILQ_INSERT_TAIL(&chardevs, chr, next);
 2599:     } else {
 2600:         chr->avail_connections = 1;
 2601:     }
 2602:     chr->label = qemu_strdup(qemu_opts_id(opts));
 2603:     return chr;
 2604: }
 2605: 
 2606: CharDriverState *qemu_chr_open(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
 2607: {
 2608:     const char *p;
 2609:     CharDriverState *chr;
 2610:     QemuOpts *opts;
 2611: 
 2612:     if (strstart(filename, "chardev:", &p)) {
 2613:         return qemu_chr_find(p);
 2614:     }
 2615: 
 2616:     opts = qemu_chr_parse_compat(label, filename);
 2617:     if (!opts)
 2618:         return NULL;
 2619: 
 2620:     chr = qemu_chr_open_opts(opts, init);
 2621:     if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
 2622:         monitor_init(chr, MONITOR_USE_READLINE);
 2623:     }
 2624:     qemu_opts_del(opts);
 2625:     return chr;
 2626: }
 2627: 
 2628: void qemu_chr_set_echo(struct CharDriverState *chr, bool echo)
 2629: {
 2630:     if (chr->chr_set_echo) {
 2631:         chr->chr_set_echo(chr, echo);
 2632:     }
 2633: }
 2634: 
 2635: void qemu_chr_guest_open(struct CharDriverState *chr)
 2636: {
 2637:     if (chr->chr_guest_open) {
 2638:         chr->chr_guest_open(chr);
 2639:     }
 2640: }
 2641: 
 2642: void qemu_chr_guest_close(struct CharDriverState *chr)
 2643: {
 2644:     if (chr->chr_guest_close) {
 2645:         chr->chr_guest_close(chr);
 2646:     }
 2647: }
 2648: 
 2649: void qemu_chr_close(CharDriverState *chr)
 2650: {
 2651:     QTAILQ_REMOVE(&chardevs, chr, next);
 2652:     if (chr->chr_close)
 2653:         chr->chr_close(chr);
 2654:     qemu_free(chr->filename);
 2655:     qemu_free(chr->label);
 2656:     qemu_free(chr);
 2657: }
 2658: 
 2659: static void qemu_chr_qlist_iter(QObject *obj, void *opaque)
 2660: {
 2661:     QDict *chr_dict;
 2662:     Monitor *mon = opaque;
 2663: 
 2664:     chr_dict = qobject_to_qdict(obj);
 2665:     monitor_printf(mon, "%s: filename=%s\n", qdict_get_str(chr_dict, "label"),
 2666:                                          qdict_get_str(chr_dict, "filename"));
 2667: }
 2668: 
 2669: void qemu_chr_info_print(Monitor *mon, const QObject *ret_data)
 2670: {
 2671:     qlist_iter(qobject_to_qlist(ret_data), qemu_chr_qlist_iter, mon);
 2672: }
 2673: 
 2674: void qemu_chr_info(Monitor *mon, QObject **ret_data)
 2675: {
 2676:     QList *chr_list;
 2677:     CharDriverState *chr;
 2678: 
 2679:     chr_list = qlist_new();
 2680: 
 2681:     QTAILQ_FOREACH(chr, &chardevs, next) {
 2682:         QObject *obj = qobject_from_jsonf("{ 'label': %s, 'filename': %s }",
 2683:                                           chr->label, chr->filename);
 2684:         qlist_append_obj(chr_list, obj);
 2685:     }
 2686: 
 2687:     *ret_data = QOBJECT(chr_list);
 2688: }
 2689: 
 2690: CharDriverState *qemu_chr_find(const char *name)
 2691: {
 2692:     CharDriverState *chr;
 2693: 
 2694:     QTAILQ_FOREACH(chr, &chardevs, next) {
 2695:         if (strcmp(chr->label, name) != 0)
 2696:             continue;
 2697:         return chr;
 2698:     }
 2699:     return NULL;
 2700: }

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