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qemu-char: make char drivers dynamically registerable
[qemu.git] / 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 "monitor/monitor.h"
26 #include "ui/console.h"
27 #include "sysemu/sysemu.h"
28 #include "qemu/timer.h"
29 #include "char/char.h"
30 #include "hw/usb.h"
31 #include "hw/baum.h"
32 #include "hw/msmouse.h"
33 #include "qmp-commands.h"
34
35 #include <unistd.h>
36 #include <fcntl.h>
37 #include <time.h>
38 #include <errno.h>
39 #include <sys/time.h>
40 #include <zlib.h>
41
42 #ifndef _WIN32
43 #include <sys/times.h>
44 #include <sys/wait.h>
45 #include <termios.h>
46 #include <sys/mman.h>
47 #include <sys/ioctl.h>
48 #include <sys/resource.h>
49 #include <sys/socket.h>
50 #include <netinet/in.h>
51 #include <net/if.h>
52 #include <arpa/inet.h>
53 #include <dirent.h>
54 #include <netdb.h>
55 #include <sys/select.h>
56 #ifdef CONFIG_BSD
57 #include <sys/stat.h>
58 #if defined(__GLIBC__)
59 #include <pty.h>
60 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
61 #include <libutil.h>
62 #else
63 #include <util.h>
64 #endif
65 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
66 #include <dev/ppbus/ppi.h>
67 #include <dev/ppbus/ppbconf.h>
68 #elif defined(__DragonFly__)
69 #include <dev/misc/ppi/ppi.h>
70 #include <bus/ppbus/ppbconf.h>
71 #endif
72 #else
73 #ifdef __linux__
74 #include <pty.h>
75
76 #include <linux/ppdev.h>
77 #include <linux/parport.h>
78 #endif
79 #ifdef __sun__
80 #include <sys/stat.h>
81 #include <sys/ethernet.h>
82 #include <sys/sockio.h>
83 #include <netinet/arp.h>
84 #include <netinet/in.h>
85 #include <netinet/in_systm.h>
86 #include <netinet/ip.h>
87 #include <netinet/ip_icmp.h> // must come after ip.h
88 #include <netinet/udp.h>
89 #include <netinet/tcp.h>
90 #include <net/if.h>
91 #include <syslog.h>
92 #include <stropts.h>
93 #endif
94 #endif
95 #endif
96
97 #include "qemu/sockets.h"
98 #include "ui/qemu-spice.h"
99
100 #define READ_BUF_LEN 4096
101
102 /***********************************************************/
103 /* character device */
104
105 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
106 QTAILQ_HEAD_INITIALIZER(chardevs);
107
108 void qemu_chr_be_event(CharDriverState *s, int event)
109 {
110 /* Keep track if the char device is open */
111 switch (event) {
112 case CHR_EVENT_OPENED:
113 s->opened = 1;
114 break;
115 case CHR_EVENT_CLOSED:
116 s->opened = 0;
117 break;
118 }
119
120 if (!s->chr_event)
121 return;
122 s->chr_event(s->handler_opaque, event);
123 }
124
125 static gboolean qemu_chr_generic_open_bh(gpointer opaque)
126 {
127 CharDriverState *s = opaque;
128 qemu_chr_be_event(s, CHR_EVENT_OPENED);
129 s->idle_tag = 0;
130 return FALSE;
131 }
132
133 void qemu_chr_generic_open(CharDriverState *s)
134 {
135 if (s->idle_tag == 0) {
136 s->idle_tag = g_idle_add(qemu_chr_generic_open_bh, s);
137 }
138 }
139
140 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
141 {
142 return s->chr_write(s, buf, len);
143 }
144
145 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
146 {
147 if (!s->chr_ioctl)
148 return -ENOTSUP;
149 return s->chr_ioctl(s, cmd, arg);
150 }
151
152 int qemu_chr_be_can_write(CharDriverState *s)
153 {
154 if (!s->chr_can_read)
155 return 0;
156 return s->chr_can_read(s->handler_opaque);
157 }
158
159 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
160 {
161 if (s->chr_read) {
162 s->chr_read(s->handler_opaque, buf, len);
163 }
164 }
165
166 int qemu_chr_fe_get_msgfd(CharDriverState *s)
167 {
168 return s->get_msgfd ? s->get_msgfd(s) : -1;
169 }
170
171 int qemu_chr_add_client(CharDriverState *s, int fd)
172 {
173 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
174 }
175
176 void qemu_chr_accept_input(CharDriverState *s)
177 {
178 if (s->chr_accept_input)
179 s->chr_accept_input(s);
180 qemu_notify_event();
181 }
182
183 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
184 {
185 char buf[READ_BUF_LEN];
186 va_list ap;
187 va_start(ap, fmt);
188 vsnprintf(buf, sizeof(buf), fmt, ap);
189 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
190 va_end(ap);
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 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
200 /* chr driver being released. */
201 ++s->avail_connections;
202 }
203 s->chr_can_read = fd_can_read;
204 s->chr_read = fd_read;
205 s->chr_event = fd_event;
206 s->handler_opaque = opaque;
207 if (s->chr_update_read_handler)
208 s->chr_update_read_handler(s);
209
210 /* We're connecting to an already opened device, so let's make sure we
211 also get the open event */
212 if (s->opened) {
213 qemu_chr_generic_open(s);
214 }
215 }
216
217 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
218 {
219 return len;
220 }
221
222 static CharDriverState *qemu_chr_open_null(QemuOpts *opts)
223 {
224 CharDriverState *chr;
225
226 chr = g_malloc0(sizeof(CharDriverState));
227 chr->chr_write = null_chr_write;
228 return chr;
229 }
230
231 /* MUX driver for serial I/O splitting */
232 #define MAX_MUX 4
233 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
234 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
235 typedef struct {
236 IOCanReadHandler *chr_can_read[MAX_MUX];
237 IOReadHandler *chr_read[MAX_MUX];
238 IOEventHandler *chr_event[MAX_MUX];
239 void *ext_opaque[MAX_MUX];
240 CharDriverState *drv;
241 int focus;
242 int mux_cnt;
243 int term_got_escape;
244 int max_size;
245 /* Intermediate input buffer allows to catch escape sequences even if the
246 currently active device is not accepting any input - but only until it
247 is full as well. */
248 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
249 int prod[MAX_MUX];
250 int cons[MAX_MUX];
251 int timestamps;
252 int linestart;
253 int64_t timestamps_start;
254 } MuxDriver;
255
256
257 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
258 {
259 MuxDriver *d = chr->opaque;
260 int ret;
261 if (!d->timestamps) {
262 ret = d->drv->chr_write(d->drv, buf, len);
263 } else {
264 int i;
265
266 ret = 0;
267 for (i = 0; i < len; i++) {
268 if (d->linestart) {
269 char buf1[64];
270 int64_t ti;
271 int secs;
272
273 ti = qemu_get_clock_ms(rt_clock);
274 if (d->timestamps_start == -1)
275 d->timestamps_start = ti;
276 ti -= d->timestamps_start;
277 secs = ti / 1000;
278 snprintf(buf1, sizeof(buf1),
279 "[%02d:%02d:%02d.%03d] ",
280 secs / 3600,
281 (secs / 60) % 60,
282 secs % 60,
283 (int)(ti % 1000));
284 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
285 d->linestart = 0;
286 }
287 ret += d->drv->chr_write(d->drv, buf+i, 1);
288 if (buf[i] == '\n') {
289 d->linestart = 1;
290 }
291 }
292 }
293 return ret;
294 }
295
296 static const char * const mux_help[] = {
297 "% h print this help\n\r",
298 "% x exit emulator\n\r",
299 "% s save disk data back to file (if -snapshot)\n\r",
300 "% t toggle console timestamps\n\r"
301 "% b send break (magic sysrq)\n\r",
302 "% c switch between console and monitor\n\r",
303 "% % sends %\n\r",
304 NULL
305 };
306
307 int term_escape_char = 0x01; /* ctrl-a is used for escape */
308 static void mux_print_help(CharDriverState *chr)
309 {
310 int i, j;
311 char ebuf[15] = "Escape-Char";
312 char cbuf[50] = "\n\r";
313
314 if (term_escape_char > 0 && term_escape_char < 26) {
315 snprintf(cbuf, sizeof(cbuf), "\n\r");
316 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
317 } else {
318 snprintf(cbuf, sizeof(cbuf),
319 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
320 term_escape_char);
321 }
322 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
323 for (i = 0; mux_help[i] != NULL; i++) {
324 for (j=0; mux_help[i][j] != '\0'; j++) {
325 if (mux_help[i][j] == '%')
326 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
327 else
328 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
329 }
330 }
331 }
332
333 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
334 {
335 if (d->chr_event[mux_nr])
336 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
337 }
338
339 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
340 {
341 if (d->term_got_escape) {
342 d->term_got_escape = 0;
343 if (ch == term_escape_char)
344 goto send_char;
345 switch(ch) {
346 case '?':
347 case 'h':
348 mux_print_help(chr);
349 break;
350 case 'x':
351 {
352 const char *term = "QEMU: Terminated\n\r";
353 chr->chr_write(chr,(uint8_t *)term,strlen(term));
354 exit(0);
355 break;
356 }
357 case 's':
358 bdrv_commit_all();
359 break;
360 case 'b':
361 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
362 break;
363 case 'c':
364 /* Switch to the next registered device */
365 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
366 d->focus++;
367 if (d->focus >= d->mux_cnt)
368 d->focus = 0;
369 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
370 break;
371 case 't':
372 d->timestamps = !d->timestamps;
373 d->timestamps_start = -1;
374 d->linestart = 0;
375 break;
376 }
377 } else if (ch == term_escape_char) {
378 d->term_got_escape = 1;
379 } else {
380 send_char:
381 return 1;
382 }
383 return 0;
384 }
385
386 static void mux_chr_accept_input(CharDriverState *chr)
387 {
388 MuxDriver *d = chr->opaque;
389 int m = d->focus;
390
391 while (d->prod[m] != d->cons[m] &&
392 d->chr_can_read[m] &&
393 d->chr_can_read[m](d->ext_opaque[m])) {
394 d->chr_read[m](d->ext_opaque[m],
395 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
396 }
397 }
398
399 static int mux_chr_can_read(void *opaque)
400 {
401 CharDriverState *chr = opaque;
402 MuxDriver *d = chr->opaque;
403 int m = d->focus;
404
405 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
406 return 1;
407 if (d->chr_can_read[m])
408 return d->chr_can_read[m](d->ext_opaque[m]);
409 return 0;
410 }
411
412 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
413 {
414 CharDriverState *chr = opaque;
415 MuxDriver *d = chr->opaque;
416 int m = d->focus;
417 int i;
418
419 mux_chr_accept_input (opaque);
420
421 for(i = 0; i < size; i++)
422 if (mux_proc_byte(chr, d, buf[i])) {
423 if (d->prod[m] == d->cons[m] &&
424 d->chr_can_read[m] &&
425 d->chr_can_read[m](d->ext_opaque[m]))
426 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
427 else
428 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
429 }
430 }
431
432 static void mux_chr_event(void *opaque, int event)
433 {
434 CharDriverState *chr = opaque;
435 MuxDriver *d = chr->opaque;
436 int i;
437
438 /* Send the event to all registered listeners */
439 for (i = 0; i < d->mux_cnt; i++)
440 mux_chr_send_event(d, i, event);
441 }
442
443 static void mux_chr_update_read_handler(CharDriverState *chr)
444 {
445 MuxDriver *d = chr->opaque;
446
447 if (d->mux_cnt >= MAX_MUX) {
448 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
449 return;
450 }
451 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
452 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
453 d->chr_read[d->mux_cnt] = chr->chr_read;
454 d->chr_event[d->mux_cnt] = chr->chr_event;
455 /* Fix up the real driver with mux routines */
456 if (d->mux_cnt == 0) {
457 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
458 mux_chr_event, chr);
459 }
460 if (d->focus != -1) {
461 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
462 }
463 d->focus = d->mux_cnt;
464 d->mux_cnt++;
465 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
466 }
467
468 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
469 {
470 CharDriverState *chr;
471 MuxDriver *d;
472
473 chr = g_malloc0(sizeof(CharDriverState));
474 d = g_malloc0(sizeof(MuxDriver));
475
476 chr->opaque = d;
477 d->drv = drv;
478 d->focus = -1;
479 chr->chr_write = mux_chr_write;
480 chr->chr_update_read_handler = mux_chr_update_read_handler;
481 chr->chr_accept_input = mux_chr_accept_input;
482 /* Frontend guest-open / -close notification is not support with muxes */
483 chr->chr_guest_open = NULL;
484 chr->chr_guest_close = NULL;
485
486 /* Muxes are always open on creation */
487 qemu_chr_generic_open(chr);
488
489 return chr;
490 }
491
492
493 #ifdef _WIN32
494 int send_all(int fd, const void *buf, int len1)
495 {
496 int ret, len;
497
498 len = len1;
499 while (len > 0) {
500 ret = send(fd, buf, len, 0);
501 if (ret < 0) {
502 errno = WSAGetLastError();
503 if (errno != WSAEWOULDBLOCK) {
504 return -1;
505 }
506 } else if (ret == 0) {
507 break;
508 } else {
509 buf += ret;
510 len -= ret;
511 }
512 }
513 return len1 - len;
514 }
515
516 #else
517
518 int send_all(int fd, const void *_buf, int len1)
519 {
520 int ret, len;
521 const uint8_t *buf = _buf;
522
523 len = len1;
524 while (len > 0) {
525 ret = write(fd, buf, len);
526 if (ret < 0) {
527 if (errno != EINTR && errno != EAGAIN)
528 return -1;
529 } else if (ret == 0) {
530 break;
531 } else {
532 buf += ret;
533 len -= ret;
534 }
535 }
536 return len1 - len;
537 }
538 #endif /* !_WIN32 */
539
540 #ifndef _WIN32
541
542 typedef struct IOWatchPoll
543 {
544 GSource *src;
545 int max_size;
546
547 IOCanReadHandler *fd_can_read;
548 void *opaque;
549
550 QTAILQ_ENTRY(IOWatchPoll) node;
551 } IOWatchPoll;
552
553 static QTAILQ_HEAD(, IOWatchPoll) io_watch_poll_list =
554 QTAILQ_HEAD_INITIALIZER(io_watch_poll_list);
555
556 static IOWatchPoll *io_watch_poll_from_source(GSource *source)
557 {
558 IOWatchPoll *i;
559
560 QTAILQ_FOREACH(i, &io_watch_poll_list, node) {
561 if (i->src == source) {
562 return i;
563 }
564 }
565
566 return NULL;
567 }
568
569 static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_)
570 {
571 IOWatchPoll *iwp = io_watch_poll_from_source(source);
572
573 iwp->max_size = iwp->fd_can_read(iwp->opaque);
574 if (iwp->max_size == 0) {
575 return FALSE;
576 }
577
578 return g_io_watch_funcs.prepare(source, timeout_);
579 }
580
581 static gboolean io_watch_poll_check(GSource *source)
582 {
583 IOWatchPoll *iwp = io_watch_poll_from_source(source);
584
585 if (iwp->max_size == 0) {
586 return FALSE;
587 }
588
589 return g_io_watch_funcs.check(source);
590 }
591
592 static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
593 gpointer user_data)
594 {
595 return g_io_watch_funcs.dispatch(source, callback, user_data);
596 }
597
598 static void io_watch_poll_finalize(GSource *source)
599 {
600 IOWatchPoll *iwp = io_watch_poll_from_source(source);
601 QTAILQ_REMOVE(&io_watch_poll_list, iwp, node);
602 g_io_watch_funcs.finalize(source);
603 }
604
605 static GSourceFuncs io_watch_poll_funcs = {
606 .prepare = io_watch_poll_prepare,
607 .check = io_watch_poll_check,
608 .dispatch = io_watch_poll_dispatch,
609 .finalize = io_watch_poll_finalize,
610 };
611
612 /* Can only be used for read */
613 static guint io_add_watch_poll(GIOChannel *channel,
614 IOCanReadHandler *fd_can_read,
615 GIOFunc fd_read,
616 gpointer user_data)
617 {
618 IOWatchPoll *iwp;
619 GSource *src;
620 guint tag;
621
622 src = g_io_create_watch(channel, G_IO_IN | G_IO_ERR | G_IO_HUP);
623 g_source_set_funcs(src, &io_watch_poll_funcs);
624 g_source_set_callback(src, (GSourceFunc)fd_read, user_data, NULL);
625 tag = g_source_attach(src, NULL);
626 g_source_unref(src);
627
628 iwp = g_malloc0(sizeof(*iwp));
629 iwp->src = src;
630 iwp->max_size = 0;
631 iwp->fd_can_read = fd_can_read;
632 iwp->opaque = user_data;
633
634 QTAILQ_INSERT_HEAD(&io_watch_poll_list, iwp, node);
635
636 return tag;
637 }
638
639 static GIOChannel *io_channel_from_fd(int fd)
640 {
641 GIOChannel *chan;
642
643 if (fd == -1) {
644 return NULL;
645 }
646
647 chan = g_io_channel_unix_new(fd);
648
649 g_io_channel_set_encoding(chan, NULL, NULL);
650 g_io_channel_set_buffered(chan, FALSE);
651
652 return chan;
653 }
654
655 static GIOChannel *io_channel_from_socket(int fd)
656 {
657 GIOChannel *chan;
658
659 if (fd == -1) {
660 return NULL;
661 }
662
663 #ifdef _WIN32
664 chan = g_io_channel_win32_new_socket(fd);
665 #else
666 chan = g_io_channel_unix_new(fd);
667 #endif
668
669 g_io_channel_set_encoding(chan, NULL, NULL);
670 g_io_channel_set_buffered(chan, FALSE);
671
672 return chan;
673 }
674
675 static int io_channel_send_all(GIOChannel *fd, const void *_buf, int len1)
676 {
677 GIOStatus status;
678 gsize bytes_written;
679 int len;
680 const uint8_t *buf = _buf;
681
682 len = len1;
683 while (len > 0) {
684 status = g_io_channel_write_chars(fd, (const gchar *)buf, len,
685 &bytes_written, NULL);
686 if (status != G_IO_STATUS_NORMAL) {
687 if (status == G_IO_STATUS_AGAIN) {
688 errno = EAGAIN;
689 return -1;
690 } else {
691 errno = EINVAL;
692 return -1;
693 }
694 } else if (status == G_IO_STATUS_EOF) {
695 break;
696 } else {
697 buf += bytes_written;
698 len -= bytes_written;
699 }
700 }
701 return len1 - len;
702 }
703
704 typedef struct FDCharDriver {
705 CharDriverState *chr;
706 GIOChannel *fd_in, *fd_out;
707 guint fd_in_tag;
708 int max_size;
709 QTAILQ_ENTRY(FDCharDriver) node;
710 } FDCharDriver;
711
712 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
713 {
714 FDCharDriver *s = chr->opaque;
715
716 return io_channel_send_all(s->fd_out, buf, len);
717 }
718
719 static gboolean fd_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
720 {
721 CharDriverState *chr = opaque;
722 FDCharDriver *s = chr->opaque;
723 int len;
724 uint8_t buf[READ_BUF_LEN];
725 GIOStatus status;
726 gsize bytes_read;
727
728 len = sizeof(buf);
729 if (len > s->max_size) {
730 len = s->max_size;
731 }
732 if (len == 0) {
733 return FALSE;
734 }
735
736 status = g_io_channel_read_chars(chan, (gchar *)buf,
737 len, &bytes_read, NULL);
738 if (status == G_IO_STATUS_EOF) {
739 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
740 return FALSE;
741 }
742 if (status == G_IO_STATUS_NORMAL) {
743 qemu_chr_be_write(chr, buf, bytes_read);
744 }
745
746 return TRUE;
747 }
748
749 static int fd_chr_read_poll(void *opaque)
750 {
751 CharDriverState *chr = opaque;
752 FDCharDriver *s = chr->opaque;
753
754 s->max_size = qemu_chr_be_can_write(chr);
755 return s->max_size;
756 }
757
758 static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
759 {
760 FDCharDriver *s = chr->opaque;
761 return g_io_create_watch(s->fd_out, cond);
762 }
763
764 static void fd_chr_update_read_handler(CharDriverState *chr)
765 {
766 FDCharDriver *s = chr->opaque;
767
768 if (s->fd_in_tag) {
769 g_source_remove(s->fd_in_tag);
770 }
771
772 if (s->fd_in) {
773 s->fd_in_tag = io_add_watch_poll(s->fd_in, fd_chr_read_poll, fd_chr_read, chr);
774 }
775 }
776
777 static void fd_chr_close(struct CharDriverState *chr)
778 {
779 FDCharDriver *s = chr->opaque;
780
781 if (s->fd_in_tag) {
782 g_source_remove(s->fd_in_tag);
783 s->fd_in_tag = 0;
784 }
785
786 if (s->fd_in) {
787 g_io_channel_unref(s->fd_in);
788 }
789 if (s->fd_out) {
790 g_io_channel_unref(s->fd_out);
791 }
792
793 g_free(s);
794 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
795 }
796
797 /* open a character device to a unix fd */
798 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
799 {
800 CharDriverState *chr;
801 FDCharDriver *s;
802
803 chr = g_malloc0(sizeof(CharDriverState));
804 s = g_malloc0(sizeof(FDCharDriver));
805 s->fd_in = io_channel_from_fd(fd_in);
806 s->fd_out = io_channel_from_fd(fd_out);
807 fcntl(fd_out, F_SETFL, O_NONBLOCK);
808 s->chr = chr;
809 chr->opaque = s;
810 chr->chr_add_watch = fd_chr_add_watch;
811 chr->chr_write = fd_chr_write;
812 chr->chr_update_read_handler = fd_chr_update_read_handler;
813 chr->chr_close = fd_chr_close;
814
815 qemu_chr_generic_open(chr);
816
817 return chr;
818 }
819
820 static CharDriverState *qemu_chr_open_file_out(QemuOpts *opts)
821 {
822 int fd_out;
823
824 TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
825 O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
826 if (fd_out < 0) {
827 return NULL;
828 }
829 return qemu_chr_open_fd(-1, fd_out);
830 }
831
832 static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts)
833 {
834 int fd_in, fd_out;
835 char filename_in[256], filename_out[256];
836 const char *filename = qemu_opt_get(opts, "path");
837
838 if (filename == NULL) {
839 fprintf(stderr, "chardev: pipe: no filename given\n");
840 return NULL;
841 }
842
843 snprintf(filename_in, 256, "%s.in", filename);
844 snprintf(filename_out, 256, "%s.out", filename);
845 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
846 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
847 if (fd_in < 0 || fd_out < 0) {
848 if (fd_in >= 0)
849 close(fd_in);
850 if (fd_out >= 0)
851 close(fd_out);
852 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
853 if (fd_in < 0) {
854 return NULL;
855 }
856 }
857 return qemu_chr_open_fd(fd_in, fd_out);
858 }
859
860 /* init terminal so that we can grab keys */
861 static struct termios oldtty;
862 static int old_fd0_flags;
863 static bool stdio_allow_signal;
864
865 static void term_exit(void)
866 {
867 tcsetattr (0, TCSANOW, &oldtty);
868 fcntl(0, F_SETFL, old_fd0_flags);
869 }
870
871 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
872 {
873 struct termios tty;
874
875 tty = oldtty;
876 if (!echo) {
877 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
878 |INLCR|IGNCR|ICRNL|IXON);
879 tty.c_oflag |= OPOST;
880 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
881 tty.c_cflag &= ~(CSIZE|PARENB);
882 tty.c_cflag |= CS8;
883 tty.c_cc[VMIN] = 1;
884 tty.c_cc[VTIME] = 0;
885 }
886 /* if graphical mode, we allow Ctrl-C handling */
887 if (!stdio_allow_signal)
888 tty.c_lflag &= ~ISIG;
889
890 tcsetattr (0, TCSANOW, &tty);
891 }
892
893 static void qemu_chr_close_stdio(struct CharDriverState *chr)
894 {
895 term_exit();
896 fd_chr_close(chr);
897 }
898
899 static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts)
900 {
901 CharDriverState *chr;
902
903 if (is_daemonized()) {
904 error_report("cannot use stdio with -daemonize");
905 return NULL;
906 }
907 old_fd0_flags = fcntl(0, F_GETFL);
908 tcgetattr (0, &oldtty);
909 fcntl(0, F_SETFL, O_NONBLOCK);
910 atexit(term_exit);
911
912 chr = qemu_chr_open_fd(0, 1);
913 chr->chr_close = qemu_chr_close_stdio;
914 chr->chr_set_echo = qemu_chr_set_echo_stdio;
915 stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
916 display_type != DT_NOGRAPHIC);
917 qemu_chr_fe_set_echo(chr, false);
918
919 return chr;
920 }
921
922 #ifdef __sun__
923 /* Once Solaris has openpty(), this is going to be removed. */
924 static int openpty(int *amaster, int *aslave, char *name,
925 struct termios *termp, struct winsize *winp)
926 {
927 const char *slave;
928 int mfd = -1, sfd = -1;
929
930 *amaster = *aslave = -1;
931
932 mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
933 if (mfd < 0)
934 goto err;
935
936 if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
937 goto err;
938
939 if ((slave = ptsname(mfd)) == NULL)
940 goto err;
941
942 if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
943 goto err;
944
945 if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
946 (termp != NULL && tcgetattr(sfd, termp) < 0))
947 goto err;
948
949 if (amaster)
950 *amaster = mfd;
951 if (aslave)
952 *aslave = sfd;
953 if (winp)
954 ioctl(sfd, TIOCSWINSZ, winp);
955
956 return 0;
957
958 err:
959 if (sfd != -1)
960 close(sfd);
961 close(mfd);
962 return -1;
963 }
964
965 static void cfmakeraw (struct termios *termios_p)
966 {
967 termios_p->c_iflag &=
968 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
969 termios_p->c_oflag &= ~OPOST;
970 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
971 termios_p->c_cflag &= ~(CSIZE|PARENB);
972 termios_p->c_cflag |= CS8;
973
974 termios_p->c_cc[VMIN] = 0;
975 termios_p->c_cc[VTIME] = 0;
976 }
977 #endif
978
979 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
980 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
981 || defined(__GLIBC__)
982
983 #define HAVE_CHARDEV_TTY 1
984
985 typedef struct {
986 GIOChannel *fd;
987 guint fd_tag;
988 int connected;
989 int polling;
990 int read_bytes;
991 guint timer_tag;
992 } PtyCharDriver;
993
994 static void pty_chr_update_read_handler(CharDriverState *chr);
995 static void pty_chr_state(CharDriverState *chr, int connected);
996
997 static gboolean pty_chr_timer(gpointer opaque)
998 {
999 struct CharDriverState *chr = opaque;
1000 PtyCharDriver *s = chr->opaque;
1001
1002 if (s->connected) {
1003 goto out;
1004 }
1005 if (s->polling) {
1006 /* If we arrive here without polling being cleared due
1007 * read returning -EIO, then we are (re-)connected */
1008 pty_chr_state(chr, 1);
1009 goto out;
1010 }
1011
1012 /* Next poll ... */
1013 pty_chr_update_read_handler(chr);
1014
1015 out:
1016 return FALSE;
1017 }
1018
1019 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1020 {
1021 PtyCharDriver *s = chr->opaque;
1022
1023 if (s->timer_tag) {
1024 g_source_remove(s->timer_tag);
1025 s->timer_tag = 0;
1026 }
1027
1028 if (ms == 1000) {
1029 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1030 } else {
1031 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1032 }
1033 }
1034
1035 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1036 {
1037 PtyCharDriver *s = chr->opaque;
1038
1039 if (!s->connected) {
1040 /* guest sends data, check for (re-)connect */
1041 pty_chr_update_read_handler(chr);
1042 return 0;
1043 }
1044 return io_channel_send_all(s->fd, buf, len);
1045 }
1046
1047 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1048 {
1049 PtyCharDriver *s = chr->opaque;
1050 return g_io_create_watch(s->fd, cond);
1051 }
1052
1053 static int pty_chr_read_poll(void *opaque)
1054 {
1055 CharDriverState *chr = opaque;
1056 PtyCharDriver *s = chr->opaque;
1057
1058 s->read_bytes = qemu_chr_be_can_write(chr);
1059 return s->read_bytes;
1060 }
1061
1062 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1063 {
1064 CharDriverState *chr = opaque;
1065 PtyCharDriver *s = chr->opaque;
1066 gsize size, len;
1067 uint8_t buf[READ_BUF_LEN];
1068 GIOStatus status;
1069
1070 len = sizeof(buf);
1071 if (len > s->read_bytes)
1072 len = s->read_bytes;
1073 if (len == 0)
1074 return FALSE;
1075 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1076 if (status != G_IO_STATUS_NORMAL) {
1077 pty_chr_state(chr, 0);
1078 return FALSE;
1079 } else {
1080 pty_chr_state(chr, 1);
1081 qemu_chr_be_write(chr, buf, size);
1082 }
1083 return TRUE;
1084 }
1085
1086 static void pty_chr_update_read_handler(CharDriverState *chr)
1087 {
1088 PtyCharDriver *s = chr->opaque;
1089
1090 if (s->fd_tag) {
1091 g_source_remove(s->fd_tag);
1092 }
1093
1094 s->fd_tag = io_add_watch_poll(s->fd, pty_chr_read_poll, pty_chr_read, chr);
1095 s->polling = 1;
1096 /*
1097 * Short timeout here: just need wait long enougth that qemu makes
1098 * it through the poll loop once. When reconnected we want a
1099 * short timeout so we notice it almost instantly. Otherwise
1100 * read() gives us -EIO instantly, making pty_chr_state() reset the
1101 * timeout to the normal (much longer) poll interval before the
1102 * timer triggers.
1103 */
1104 pty_chr_rearm_timer(chr, 10);
1105 }
1106
1107 static void pty_chr_state(CharDriverState *chr, int connected)
1108 {
1109 PtyCharDriver *s = chr->opaque;
1110
1111 if (!connected) {
1112 g_source_remove(s->fd_tag);
1113 s->fd_tag = 0;
1114 s->connected = 0;
1115 s->polling = 0;
1116 /* (re-)connect poll interval for idle guests: once per second.
1117 * We check more frequently in case the guests sends data to
1118 * the virtual device linked to our pty. */
1119 pty_chr_rearm_timer(chr, 1000);
1120 } else {
1121 if (!s->connected)
1122 qemu_chr_generic_open(chr);
1123 s->connected = 1;
1124 }
1125 }
1126
1127
1128 static void pty_chr_close(struct CharDriverState *chr)
1129 {
1130 PtyCharDriver *s = chr->opaque;
1131 int fd;
1132
1133 if (s->fd_tag) {
1134 g_source_remove(s->fd_tag);
1135 }
1136 fd = g_io_channel_unix_get_fd(s->fd);
1137 g_io_channel_unref(s->fd);
1138 close(fd);
1139 if (s->timer_tag) {
1140 g_source_remove(s->timer_tag);
1141 }
1142 g_free(s);
1143 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1144 }
1145
1146 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
1147 {
1148 CharDriverState *chr;
1149 PtyCharDriver *s;
1150 struct termios tty;
1151 const char *label;
1152 int master_fd, slave_fd, len;
1153 #if defined(__OpenBSD__) || defined(__DragonFly__)
1154 char pty_name[PATH_MAX];
1155 #define q_ptsname(x) pty_name
1156 #else
1157 char *pty_name = NULL;
1158 #define q_ptsname(x) ptsname(x)
1159 #endif
1160
1161 if (openpty(&master_fd, &slave_fd, pty_name, NULL, NULL) < 0) {
1162 return NULL;
1163 }
1164
1165 /* Set raw attributes on the pty. */
1166 tcgetattr(slave_fd, &tty);
1167 cfmakeraw(&tty);
1168 tcsetattr(slave_fd, TCSAFLUSH, &tty);
1169 close(slave_fd);
1170
1171 chr = g_malloc0(sizeof(CharDriverState));
1172
1173 len = strlen(q_ptsname(master_fd)) + 5;
1174 chr->filename = g_malloc(len);
1175 snprintf(chr->filename, len, "pty:%s", q_ptsname(master_fd));
1176 qemu_opt_set(opts, "path", q_ptsname(master_fd));
1177
1178 label = qemu_opts_id(opts);
1179 fprintf(stderr, "char device redirected to %s%s%s%s\n",
1180 q_ptsname(master_fd),
1181 label ? " (label " : "",
1182 label ? label : "",
1183 label ? ")" : "");
1184
1185 s = g_malloc0(sizeof(PtyCharDriver));
1186 chr->opaque = s;
1187 chr->chr_write = pty_chr_write;
1188 chr->chr_update_read_handler = pty_chr_update_read_handler;
1189 chr->chr_close = pty_chr_close;
1190 chr->chr_add_watch = pty_chr_add_watch;
1191
1192 s->fd = io_channel_from_fd(master_fd);
1193 s->timer_tag = 0;
1194
1195 return chr;
1196 }
1197
1198 static void tty_serial_init(int fd, int speed,
1199 int parity, int data_bits, int stop_bits)
1200 {
1201 struct termios tty;
1202 speed_t spd;
1203
1204 #if 0
1205 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1206 speed, parity, data_bits, stop_bits);
1207 #endif
1208 tcgetattr (fd, &tty);
1209
1210 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1211 speed = speed * 10 / 11;
1212 do {
1213 check_speed(50);
1214 check_speed(75);
1215 check_speed(110);
1216 check_speed(134);
1217 check_speed(150);
1218 check_speed(200);
1219 check_speed(300);
1220 check_speed(600);
1221 check_speed(1200);
1222 check_speed(1800);
1223 check_speed(2400);
1224 check_speed(4800);
1225 check_speed(9600);
1226 check_speed(19200);
1227 check_speed(38400);
1228 /* Non-Posix values follow. They may be unsupported on some systems. */
1229 check_speed(57600);
1230 check_speed(115200);
1231 #ifdef B230400
1232 check_speed(230400);
1233 #endif
1234 #ifdef B460800
1235 check_speed(460800);
1236 #endif
1237 #ifdef B500000
1238 check_speed(500000);
1239 #endif
1240 #ifdef B576000
1241 check_speed(576000);
1242 #endif
1243 #ifdef B921600
1244 check_speed(921600);
1245 #endif
1246 #ifdef B1000000
1247 check_speed(1000000);
1248 #endif
1249 #ifdef B1152000
1250 check_speed(1152000);
1251 #endif
1252 #ifdef B1500000
1253 check_speed(1500000);
1254 #endif
1255 #ifdef B2000000
1256 check_speed(2000000);
1257 #endif
1258 #ifdef B2500000
1259 check_speed(2500000);
1260 #endif
1261 #ifdef B3000000
1262 check_speed(3000000);
1263 #endif
1264 #ifdef B3500000
1265 check_speed(3500000);
1266 #endif
1267 #ifdef B4000000
1268 check_speed(4000000);
1269 #endif
1270 spd = B115200;
1271 } while (0);
1272
1273 cfsetispeed(&tty, spd);
1274 cfsetospeed(&tty, spd);
1275
1276 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1277 |INLCR|IGNCR|ICRNL|IXON);
1278 tty.c_oflag |= OPOST;
1279 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1280 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1281 switch(data_bits) {
1282 default:
1283 case 8:
1284 tty.c_cflag |= CS8;
1285 break;
1286 case 7:
1287 tty.c_cflag |= CS7;
1288 break;
1289 case 6:
1290 tty.c_cflag |= CS6;
1291 break;
1292 case 5:
1293 tty.c_cflag |= CS5;
1294 break;
1295 }
1296 switch(parity) {
1297 default:
1298 case 'N':
1299 break;
1300 case 'E':
1301 tty.c_cflag |= PARENB;
1302 break;
1303 case 'O':
1304 tty.c_cflag |= PARENB | PARODD;
1305 break;
1306 }
1307 if (stop_bits == 2)
1308 tty.c_cflag |= CSTOPB;
1309
1310 tcsetattr (fd, TCSANOW, &tty);
1311 }
1312
1313 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1314 {
1315 FDCharDriver *s = chr->opaque;
1316
1317 switch(cmd) {
1318 case CHR_IOCTL_SERIAL_SET_PARAMS:
1319 {
1320 QEMUSerialSetParams *ssp = arg;
1321 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1322 ssp->speed, ssp->parity,
1323 ssp->data_bits, ssp->stop_bits);
1324 }
1325 break;
1326 case CHR_IOCTL_SERIAL_SET_BREAK:
1327 {
1328 int enable = *(int *)arg;
1329 if (enable) {
1330 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1331 }
1332 }
1333 break;
1334 case CHR_IOCTL_SERIAL_GET_TIOCM:
1335 {
1336 int sarg = 0;
1337 int *targ = (int *)arg;
1338 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1339 *targ = 0;
1340 if (sarg & TIOCM_CTS)
1341 *targ |= CHR_TIOCM_CTS;
1342 if (sarg & TIOCM_CAR)
1343 *targ |= CHR_TIOCM_CAR;
1344 if (sarg & TIOCM_DSR)
1345 *targ |= CHR_TIOCM_DSR;
1346 if (sarg & TIOCM_RI)
1347 *targ |= CHR_TIOCM_RI;
1348 if (sarg & TIOCM_DTR)
1349 *targ |= CHR_TIOCM_DTR;
1350 if (sarg & TIOCM_RTS)
1351 *targ |= CHR_TIOCM_RTS;
1352 }
1353 break;
1354 case CHR_IOCTL_SERIAL_SET_TIOCM:
1355 {
1356 int sarg = *(int *)arg;
1357 int targ = 0;
1358 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1359 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1360 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1361 if (sarg & CHR_TIOCM_CTS)
1362 targ |= TIOCM_CTS;
1363 if (sarg & CHR_TIOCM_CAR)
1364 targ |= TIOCM_CAR;
1365 if (sarg & CHR_TIOCM_DSR)
1366 targ |= TIOCM_DSR;
1367 if (sarg & CHR_TIOCM_RI)
1368 targ |= TIOCM_RI;
1369 if (sarg & CHR_TIOCM_DTR)
1370 targ |= TIOCM_DTR;
1371 if (sarg & CHR_TIOCM_RTS)
1372 targ |= TIOCM_RTS;
1373 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1374 }
1375 break;
1376 default:
1377 return -ENOTSUP;
1378 }
1379 return 0;
1380 }
1381
1382 static void qemu_chr_close_tty(CharDriverState *chr)
1383 {
1384 FDCharDriver *s = chr->opaque;
1385 int fd = -1;
1386
1387 if (s) {
1388 fd = g_io_channel_unix_get_fd(s->fd_in);
1389 }
1390
1391 fd_chr_close(chr);
1392
1393 if (fd >= 0) {
1394 close(fd);
1395 }
1396 }
1397
1398 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1399 {
1400 CharDriverState *chr;
1401
1402 tty_serial_init(fd, 115200, 'N', 8, 1);
1403 chr = qemu_chr_open_fd(fd, fd);
1404 chr->chr_ioctl = tty_serial_ioctl;
1405 chr->chr_close = qemu_chr_close_tty;
1406 return chr;
1407 }
1408
1409 static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
1410 {
1411 const char *filename = qemu_opt_get(opts, "path");
1412 int fd;
1413
1414 TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK));
1415 if (fd < 0) {
1416 return NULL;
1417 }
1418 return qemu_chr_open_tty_fd(fd);
1419 }
1420 #endif /* __linux__ || __sun__ */
1421
1422 #if defined(__linux__)
1423
1424 #define HAVE_CHARDEV_PARPORT 1
1425
1426 typedef struct {
1427 int fd;
1428 int mode;
1429 } ParallelCharDriver;
1430
1431 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1432 {
1433 if (s->mode != mode) {
1434 int m = mode;
1435 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1436 return 0;
1437 s->mode = mode;
1438 }
1439 return 1;
1440 }
1441
1442 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1443 {
1444 ParallelCharDriver *drv = chr->opaque;
1445 int fd = drv->fd;
1446 uint8_t b;
1447
1448 switch(cmd) {
1449 case CHR_IOCTL_PP_READ_DATA:
1450 if (ioctl(fd, PPRDATA, &b) < 0)
1451 return -ENOTSUP;
1452 *(uint8_t *)arg = b;
1453 break;
1454 case CHR_IOCTL_PP_WRITE_DATA:
1455 b = *(uint8_t *)arg;
1456 if (ioctl(fd, PPWDATA, &b) < 0)
1457 return -ENOTSUP;
1458 break;
1459 case CHR_IOCTL_PP_READ_CONTROL:
1460 if (ioctl(fd, PPRCONTROL, &b) < 0)
1461 return -ENOTSUP;
1462 /* Linux gives only the lowest bits, and no way to know data
1463 direction! For better compatibility set the fixed upper
1464 bits. */
1465 *(uint8_t *)arg = b | 0xc0;
1466 break;
1467 case CHR_IOCTL_PP_WRITE_CONTROL:
1468 b = *(uint8_t *)arg;
1469 if (ioctl(fd, PPWCONTROL, &b) < 0)
1470 return -ENOTSUP;
1471 break;
1472 case CHR_IOCTL_PP_READ_STATUS:
1473 if (ioctl(fd, PPRSTATUS, &b) < 0)
1474 return -ENOTSUP;
1475 *(uint8_t *)arg = b;
1476 break;
1477 case CHR_IOCTL_PP_DATA_DIR:
1478 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1479 return -ENOTSUP;
1480 break;
1481 case CHR_IOCTL_PP_EPP_READ_ADDR:
1482 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1483 struct ParallelIOArg *parg = arg;
1484 int n = read(fd, parg->buffer, parg->count);
1485 if (n != parg->count) {
1486 return -EIO;
1487 }
1488 }
1489 break;
1490 case CHR_IOCTL_PP_EPP_READ:
1491 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1492 struct ParallelIOArg *parg = arg;
1493 int n = read(fd, parg->buffer, parg->count);
1494 if (n != parg->count) {
1495 return -EIO;
1496 }
1497 }
1498 break;
1499 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1500 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1501 struct ParallelIOArg *parg = arg;
1502 int n = write(fd, parg->buffer, parg->count);
1503 if (n != parg->count) {
1504 return -EIO;
1505 }
1506 }
1507 break;
1508 case CHR_IOCTL_PP_EPP_WRITE:
1509 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1510 struct ParallelIOArg *parg = arg;
1511 int n = write(fd, parg->buffer, parg->count);
1512 if (n != parg->count) {
1513 return -EIO;
1514 }
1515 }
1516 break;
1517 default:
1518 return -ENOTSUP;
1519 }
1520 return 0;
1521 }
1522
1523 static void pp_close(CharDriverState *chr)
1524 {
1525 ParallelCharDriver *drv = chr->opaque;
1526 int fd = drv->fd;
1527
1528 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1529 ioctl(fd, PPRELEASE);
1530 close(fd);
1531 g_free(drv);
1532 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1533 }
1534
1535 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1536 {
1537 CharDriverState *chr;
1538 ParallelCharDriver *drv;
1539
1540 if (ioctl(fd, PPCLAIM) < 0) {
1541 close(fd);
1542 return NULL;
1543 }
1544
1545 drv = g_malloc0(sizeof(ParallelCharDriver));
1546 drv->fd = fd;
1547 drv->mode = IEEE1284_MODE_COMPAT;
1548
1549 chr = g_malloc0(sizeof(CharDriverState));
1550 chr->chr_write = null_chr_write;
1551 chr->chr_ioctl = pp_ioctl;
1552 chr->chr_close = pp_close;
1553 chr->opaque = drv;
1554
1555 qemu_chr_generic_open(chr);
1556
1557 return chr;
1558 }
1559 #endif /* __linux__ */
1560
1561 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1562
1563 #define HAVE_CHARDEV_PARPORT 1
1564
1565 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1566 {
1567 int fd = (int)(intptr_t)chr->opaque;
1568 uint8_t b;
1569
1570 switch(cmd) {
1571 case CHR_IOCTL_PP_READ_DATA:
1572 if (ioctl(fd, PPIGDATA, &b) < 0)
1573 return -ENOTSUP;
1574 *(uint8_t *)arg = b;
1575 break;
1576 case CHR_IOCTL_PP_WRITE_DATA:
1577 b = *(uint8_t *)arg;
1578 if (ioctl(fd, PPISDATA, &b) < 0)
1579 return -ENOTSUP;
1580 break;
1581 case CHR_IOCTL_PP_READ_CONTROL:
1582 if (ioctl(fd, PPIGCTRL, &b) < 0)
1583 return -ENOTSUP;
1584 *(uint8_t *)arg = b;
1585 break;
1586 case CHR_IOCTL_PP_WRITE_CONTROL:
1587 b = *(uint8_t *)arg;
1588 if (ioctl(fd, PPISCTRL, &b) < 0)
1589 return -ENOTSUP;
1590 break;
1591 case CHR_IOCTL_PP_READ_STATUS:
1592 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1593 return -ENOTSUP;
1594 *(uint8_t *)arg = b;
1595 break;
1596 default:
1597 return -ENOTSUP;
1598 }
1599 return 0;
1600 }
1601
1602 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1603 {
1604 CharDriverState *chr;
1605
1606 chr = g_malloc0(sizeof(CharDriverState));
1607 chr->opaque = (void *)(intptr_t)fd;
1608 chr->chr_write = null_chr_write;
1609 chr->chr_ioctl = pp_ioctl;
1610 return chr;
1611 }
1612 #endif
1613
1614 #else /* _WIN32 */
1615
1616 typedef struct {
1617 int max_size;
1618 HANDLE hcom, hrecv, hsend;
1619 OVERLAPPED orecv, osend;
1620 BOOL fpipe;
1621 DWORD len;
1622 } WinCharState;
1623
1624 typedef struct {
1625 HANDLE hStdIn;
1626 HANDLE hInputReadyEvent;
1627 HANDLE hInputDoneEvent;
1628 HANDLE hInputThread;
1629 uint8_t win_stdio_buf;
1630 } WinStdioCharState;
1631
1632 #define NSENDBUF 2048
1633 #define NRECVBUF 2048
1634 #define MAXCONNECT 1
1635 #define NTIMEOUT 5000
1636
1637 static int win_chr_poll(void *opaque);
1638 static int win_chr_pipe_poll(void *opaque);
1639
1640 static void win_chr_close(CharDriverState *chr)
1641 {
1642 WinCharState *s = chr->opaque;
1643
1644 if (s->hsend) {
1645 CloseHandle(s->hsend);
1646 s->hsend = NULL;
1647 }
1648 if (s->hrecv) {
1649 CloseHandle(s->hrecv);
1650 s->hrecv = NULL;
1651 }
1652 if (s->hcom) {
1653 CloseHandle(s->hcom);
1654 s->hcom = NULL;
1655 }
1656 if (s->fpipe)
1657 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1658 else
1659 qemu_del_polling_cb(win_chr_poll, chr);
1660
1661 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1662 }
1663
1664 static int win_chr_init(CharDriverState *chr, const char *filename)
1665 {
1666 WinCharState *s = chr->opaque;
1667 COMMCONFIG comcfg;
1668 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1669 COMSTAT comstat;
1670 DWORD size;
1671 DWORD err;
1672
1673 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1674 if (!s->hsend) {
1675 fprintf(stderr, "Failed CreateEvent\n");
1676 goto fail;
1677 }
1678 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1679 if (!s->hrecv) {
1680 fprintf(stderr, "Failed CreateEvent\n");
1681 goto fail;
1682 }
1683
1684 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1685 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1686 if (s->hcom == INVALID_HANDLE_VALUE) {
1687 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1688 s->hcom = NULL;
1689 goto fail;
1690 }
1691
1692 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1693 fprintf(stderr, "Failed SetupComm\n");
1694 goto fail;
1695 }
1696
1697 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1698 size = sizeof(COMMCONFIG);
1699 GetDefaultCommConfig(filename, &comcfg, &size);
1700 comcfg.dcb.DCBlength = sizeof(DCB);
1701 CommConfigDialog(filename, NULL, &comcfg);
1702
1703 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1704 fprintf(stderr, "Failed SetCommState\n");
1705 goto fail;
1706 }
1707
1708 if (!SetCommMask(s->hcom, EV_ERR)) {
1709 fprintf(stderr, "Failed SetCommMask\n");
1710 goto fail;
1711 }
1712
1713 cto.ReadIntervalTimeout = MAXDWORD;
1714 if (!SetCommTimeouts(s->hcom, &cto)) {
1715 fprintf(stderr, "Failed SetCommTimeouts\n");
1716 goto fail;
1717 }
1718
1719 if (!ClearCommError(s->hcom, &err, &comstat)) {
1720 fprintf(stderr, "Failed ClearCommError\n");
1721 goto fail;
1722 }
1723 qemu_add_polling_cb(win_chr_poll, chr);
1724 return 0;
1725
1726 fail:
1727 win_chr_close(chr);
1728 return -1;
1729 }
1730
1731 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1732 {
1733 WinCharState *s = chr->opaque;
1734 DWORD len, ret, size, err;
1735
1736 len = len1;
1737 ZeroMemory(&s->osend, sizeof(s->osend));
1738 s->osend.hEvent = s->hsend;
1739 while (len > 0) {
1740 if (s->hsend)
1741 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1742 else
1743 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1744 if (!ret) {
1745 err = GetLastError();
1746 if (err == ERROR_IO_PENDING) {
1747 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1748 if (ret) {
1749 buf += size;
1750 len -= size;
1751 } else {
1752 break;
1753 }
1754 } else {
1755 break;
1756 }
1757 } else {
1758 buf += size;
1759 len -= size;
1760 }
1761 }
1762 return len1 - len;
1763 }
1764
1765 static int win_chr_read_poll(CharDriverState *chr)
1766 {
1767 WinCharState *s = chr->opaque;
1768
1769 s->max_size = qemu_chr_be_can_write(chr);
1770 return s->max_size;
1771 }
1772
1773 static void win_chr_readfile(CharDriverState *chr)
1774 {
1775 WinCharState *s = chr->opaque;
1776 int ret, err;
1777 uint8_t buf[READ_BUF_LEN];
1778 DWORD size;
1779
1780 ZeroMemory(&s->orecv, sizeof(s->orecv));
1781 s->orecv.hEvent = s->hrecv;
1782 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1783 if (!ret) {
1784 err = GetLastError();
1785 if (err == ERROR_IO_PENDING) {
1786 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1787 }
1788 }
1789
1790 if (size > 0) {
1791 qemu_chr_be_write(chr, buf, size);
1792 }
1793 }
1794
1795 static void win_chr_read(CharDriverState *chr)
1796 {
1797 WinCharState *s = chr->opaque;
1798
1799 if (s->len > s->max_size)
1800 s->len = s->max_size;
1801 if (s->len == 0)
1802 return;
1803
1804 win_chr_readfile(chr);
1805 }
1806
1807 static int win_chr_poll(void *opaque)
1808 {
1809 CharDriverState *chr = opaque;
1810 WinCharState *s = chr->opaque;
1811 COMSTAT status;
1812 DWORD comerr;
1813
1814 ClearCommError(s->hcom, &comerr, &status);
1815 if (status.cbInQue > 0) {
1816 s->len = status.cbInQue;
1817 win_chr_read_poll(chr);
1818 win_chr_read(chr);
1819 return 1;
1820 }
1821 return 0;
1822 }
1823
1824 static CharDriverState *qemu_chr_open_win_path(const char *filename)
1825 {
1826 CharDriverState *chr;
1827 WinCharState *s;
1828
1829 chr = g_malloc0(sizeof(CharDriverState));
1830 s = g_malloc0(sizeof(WinCharState));
1831 chr->opaque = s;
1832 chr->chr_write = win_chr_write;
1833 chr->chr_close = win_chr_close;
1834
1835 if (win_chr_init(chr, filename) < 0) {
1836 g_free(s);
1837 g_free(chr);
1838 return NULL;
1839 }
1840 qemu_chr_generic_open(chr);
1841 return chr;
1842 }
1843
1844 static CharDriverState *qemu_chr_open_win(QemuOpts *opts)
1845 {
1846 return qemu_chr_open_win_path(qemu_opt_get(opts, "path"));
1847 }
1848
1849 static int win_chr_pipe_poll(void *opaque)
1850 {
1851 CharDriverState *chr = opaque;
1852 WinCharState *s = chr->opaque;
1853 DWORD size;
1854
1855 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1856 if (size > 0) {
1857 s->len = size;
1858 win_chr_read_poll(chr);
1859 win_chr_read(chr);
1860 return 1;
1861 }
1862 return 0;
1863 }
1864
1865 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1866 {
1867 WinCharState *s = chr->opaque;
1868 OVERLAPPED ov;
1869 int ret;
1870 DWORD size;
1871 char openname[256];
1872
1873 s->fpipe = TRUE;
1874
1875 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1876 if (!s->hsend) {
1877 fprintf(stderr, "Failed CreateEvent\n");
1878 goto fail;
1879 }
1880 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1881 if (!s->hrecv) {
1882 fprintf(stderr, "Failed CreateEvent\n");
1883 goto fail;
1884 }
1885
1886 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1887 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1888 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1889 PIPE_WAIT,
1890 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1891 if (s->hcom == INVALID_HANDLE_VALUE) {
1892 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1893 s->hcom = NULL;
1894 goto fail;
1895 }
1896
1897 ZeroMemory(&ov, sizeof(ov));
1898 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1899 ret = ConnectNamedPipe(s->hcom, &ov);
1900 if (ret) {
1901 fprintf(stderr, "Failed ConnectNamedPipe\n");
1902 goto fail;
1903 }
1904
1905 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1906 if (!ret) {
1907 fprintf(stderr, "Failed GetOverlappedResult\n");
1908 if (ov.hEvent) {
1909 CloseHandle(ov.hEvent);
1910 ov.hEvent = NULL;
1911 }
1912 goto fail;
1913 }
1914
1915 if (ov.hEvent) {
1916 CloseHandle(ov.hEvent);
1917 ov.hEvent = NULL;
1918 }
1919 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1920 return 0;
1921
1922 fail:
1923 win_chr_close(chr);
1924 return -1;
1925 }
1926
1927
1928 static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts)
1929 {
1930 const char *filename = qemu_opt_get(opts, "path");
1931 CharDriverState *chr;
1932 WinCharState *s;
1933
1934 chr = g_malloc0(sizeof(CharDriverState));
1935 s = g_malloc0(sizeof(WinCharState));
1936 chr->opaque = s;
1937 chr->chr_write = win_chr_write;
1938 chr->chr_close = win_chr_close;
1939
1940 if (win_chr_pipe_init(chr, filename) < 0) {
1941 g_free(s);
1942 g_free(chr);
1943 return NULL;
1944 }
1945 qemu_chr_generic_open(chr);
1946 return chr;
1947 }
1948
1949 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1950 {
1951 CharDriverState *chr;
1952 WinCharState *s;
1953
1954 chr = g_malloc0(sizeof(CharDriverState));
1955 s = g_malloc0(sizeof(WinCharState));
1956 s->hcom = fd_out;
1957 chr->opaque = s;
1958 chr->chr_write = win_chr_write;
1959 qemu_chr_generic_open(chr);
1960 return chr;
1961 }
1962
1963 static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts)
1964 {
1965 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1966 }
1967
1968 static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts)
1969 {
1970 const char *file_out = qemu_opt_get(opts, "path");
1971 HANDLE fd_out;
1972
1973 fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1974 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1975 if (fd_out == INVALID_HANDLE_VALUE) {
1976 return NULL;
1977 }
1978
1979 return qemu_chr_open_win_file(fd_out);
1980 }
1981
1982 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1983 {
1984 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1985 DWORD dwSize;
1986 int len1;
1987
1988 len1 = len;
1989
1990 while (len1 > 0) {
1991 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1992 break;
1993 }
1994 buf += dwSize;
1995 len1 -= dwSize;
1996 }
1997
1998 return len - len1;
1999 }
2000
2001 static void win_stdio_wait_func(void *opaque)
2002 {
2003 CharDriverState *chr = opaque;
2004 WinStdioCharState *stdio = chr->opaque;
2005 INPUT_RECORD buf[4];
2006 int ret;
2007 DWORD dwSize;
2008 int i;
2009
2010 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
2011 &dwSize);
2012
2013 if (!ret) {
2014 /* Avoid error storm */
2015 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2016 return;
2017 }
2018
2019 for (i = 0; i < dwSize; i++) {
2020 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2021
2022 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2023 int j;
2024 if (kev->uChar.AsciiChar != 0) {
2025 for (j = 0; j < kev->wRepeatCount; j++) {
2026 if (qemu_chr_be_can_write(chr)) {
2027 uint8_t c = kev->uChar.AsciiChar;
2028 qemu_chr_be_write(chr, &c, 1);
2029 }
2030 }
2031 }
2032 }
2033 }
2034 }
2035
2036 static DWORD WINAPI win_stdio_thread(LPVOID param)
2037 {
2038 CharDriverState *chr = param;
2039 WinStdioCharState *stdio = chr->opaque;
2040 int ret;
2041 DWORD dwSize;
2042
2043 while (1) {
2044
2045 /* Wait for one byte */
2046 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2047
2048 /* Exit in case of error, continue if nothing read */
2049 if (!ret) {
2050 break;
2051 }
2052 if (!dwSize) {
2053 continue;
2054 }
2055
2056 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2057 if (stdio->win_stdio_buf == '\r') {
2058 continue;
2059 }
2060
2061 /* Signal the main thread and wait until the byte was eaten */
2062 if (!SetEvent(stdio->hInputReadyEvent)) {
2063 break;
2064 }
2065 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2066 != WAIT_OBJECT_0) {
2067 break;
2068 }
2069 }
2070
2071 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2072 return 0;
2073 }
2074
2075 static void win_stdio_thread_wait_func(void *opaque)
2076 {
2077 CharDriverState *chr = opaque;
2078 WinStdioCharState *stdio = chr->opaque;
2079
2080 if (qemu_chr_be_can_write(chr)) {
2081 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2082 }
2083
2084 SetEvent(stdio->hInputDoneEvent);
2085 }
2086
2087 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2088 {
2089 WinStdioCharState *stdio = chr->opaque;
2090 DWORD dwMode = 0;
2091
2092 GetConsoleMode(stdio->hStdIn, &dwMode);
2093
2094 if (echo) {
2095 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2096 } else {
2097 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2098 }
2099 }
2100
2101 static void win_stdio_close(CharDriverState *chr)
2102 {
2103 WinStdioCharState *stdio = chr->opaque;
2104
2105 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2106 CloseHandle(stdio->hInputReadyEvent);
2107 }
2108 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2109 CloseHandle(stdio->hInputDoneEvent);
2110 }
2111 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2112 TerminateThread(stdio->hInputThread, 0);
2113 }
2114
2115 g_free(chr->opaque);
2116 g_free(chr);
2117 }
2118
2119 static CharDriverState *qemu_chr_open_win_stdio(QemuOpts *opts)
2120 {
2121 CharDriverState *chr;
2122 WinStdioCharState *stdio;
2123 DWORD dwMode;
2124 int is_console = 0;
2125
2126 chr = g_malloc0(sizeof(CharDriverState));
2127 stdio = g_malloc0(sizeof(WinStdioCharState));
2128
2129 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2130 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2131 fprintf(stderr, "cannot open stdio: invalid handle\n");
2132 exit(1);
2133 }
2134
2135 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2136
2137 chr->opaque = stdio;
2138 chr->chr_write = win_stdio_write;
2139 chr->chr_close = win_stdio_close;
2140
2141 if (is_console) {
2142 if (qemu_add_wait_object(stdio->hStdIn,
2143 win_stdio_wait_func, chr)) {
2144 fprintf(stderr, "qemu_add_wait_object: failed\n");
2145 }
2146 } else {
2147 DWORD dwId;
2148
2149 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2150 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2151 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2152 chr, 0, &dwId);
2153
2154 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2155 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2156 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2157 fprintf(stderr, "cannot create stdio thread or event\n");
2158 exit(1);
2159 }
2160 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2161 win_stdio_thread_wait_func, chr)) {
2162 fprintf(stderr, "qemu_add_wait_object: failed\n");
2163 }
2164 }
2165
2166 dwMode |= ENABLE_LINE_INPUT;
2167
2168 if (is_console) {
2169 /* set the terminal in raw mode */
2170 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2171 dwMode |= ENABLE_PROCESSED_INPUT;
2172 }
2173
2174 SetConsoleMode(stdio->hStdIn, dwMode);
2175
2176 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2177 qemu_chr_fe_set_echo(chr, false);
2178
2179 return chr;
2180 }
2181 #endif /* !_WIN32 */
2182
2183 /***********************************************************/
2184 /* UDP Net console */
2185
2186 typedef struct {
2187 int fd;
2188 GIOChannel *chan;
2189 guint tag;
2190 uint8_t buf[READ_BUF_LEN];
2191 int bufcnt;
2192 int bufptr;
2193 int max_size;
2194 } NetCharDriver;
2195
2196 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2197 {
2198 NetCharDriver *s = chr->opaque;
2199 gsize bytes_written;
2200 GIOStatus status;
2201
2202 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2203 if (status == G_IO_STATUS_EOF) {
2204 return 0;
2205 } else if (status != G_IO_STATUS_NORMAL) {
2206 return -1;
2207 }
2208
2209 return bytes_written;
2210 }
2211
2212 static int udp_chr_read_poll(void *opaque)
2213 {
2214 CharDriverState *chr = opaque;
2215 NetCharDriver *s = chr->opaque;
2216
2217 s->max_size = qemu_chr_be_can_write(chr);
2218
2219 /* If there were any stray characters in the queue process them
2220 * first
2221 */
2222 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2223 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2224 s->bufptr++;
2225 s->max_size = qemu_chr_be_can_write(chr);
2226 }
2227 return s->max_size;
2228 }
2229
2230 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2231 {
2232 CharDriverState *chr = opaque;
2233 NetCharDriver *s = chr->opaque;
2234 gsize bytes_read = 0;
2235 GIOStatus status;
2236
2237 if (s->max_size == 0)
2238 return FALSE;
2239 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2240 &bytes_read, NULL);
2241 s->bufcnt = bytes_read;
2242 s->bufptr = s->bufcnt;
2243 if (status != G_IO_STATUS_NORMAL) {
2244 return FALSE;
2245 }
2246
2247 s->bufptr = 0;
2248 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2249 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2250 s->bufptr++;
2251 s->max_size = qemu_chr_be_can_write(chr);
2252 }
2253
2254 return TRUE;
2255 }
2256
2257 static void udp_chr_update_read_handler(CharDriverState *chr)
2258 {
2259 NetCharDriver *s = chr->opaque;
2260
2261 if (s->tag) {
2262 g_source_remove(s->tag);
2263 s->tag = 0;
2264 }
2265
2266 if (s->chan) {
2267 s->tag = io_add_watch_poll(s->chan, udp_chr_read_poll, udp_chr_read, chr);
2268 }
2269 }
2270
2271 static void udp_chr_close(CharDriverState *chr)
2272 {
2273 NetCharDriver *s = chr->opaque;
2274 if (s->tag) {
2275 g_source_remove(s->tag);
2276 }
2277 if (s->chan) {
2278 g_io_channel_unref(s->chan);
2279 closesocket(s->fd);
2280 }
2281 g_free(s);
2282 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2283 }
2284
2285 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2286 {
2287 CharDriverState *chr = NULL;
2288 NetCharDriver *s = NULL;
2289 Error *local_err = NULL;
2290 int fd = -1;
2291
2292 chr = g_malloc0(sizeof(CharDriverState));
2293 s = g_malloc0(sizeof(NetCharDriver));
2294
2295 fd = inet_dgram_opts(opts, &local_err);
2296 if (fd < 0) {
2297 goto return_err;
2298 }
2299
2300 s->fd = fd;
2301 s->chan = io_channel_from_socket(s->fd);
2302 s->bufcnt = 0;
2303 s->bufptr = 0;
2304 chr->opaque = s;
2305 chr->chr_write = udp_chr_write;
2306 chr->chr_update_read_handler = udp_chr_update_read_handler;
2307 chr->chr_close = udp_chr_close;
2308 return chr;
2309
2310 return_err:
2311 if (local_err) {
2312 qerror_report_err(local_err);
2313 error_free(local_err);
2314 }
2315 g_free(chr);
2316 g_free(s);
2317 if (fd >= 0) {
2318 closesocket(fd);
2319 }
2320 return NULL;
2321 }
2322
2323 /***********************************************************/
2324 /* TCP Net console */
2325
2326 typedef struct {
2327
2328 GIOChannel *chan, *listen_chan;
2329 guint tag, listen_tag;
2330 int fd, listen_fd;
2331 int connected;
2332 int max_size;
2333 int do_telnetopt;
2334 int do_nodelay;
2335 int is_unix;
2336 int msgfd;
2337 } TCPCharDriver;
2338
2339 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2340
2341 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2342 {
2343 TCPCharDriver *s = chr->opaque;
2344 if (s->connected) {
2345 return io_channel_send_all(s->chan, buf, len);
2346 } else {
2347 /* XXX: indicate an error ? */
2348 return len;
2349 }
2350 }
2351
2352 static int tcp_chr_read_poll(void *opaque)
2353 {
2354 CharDriverState *chr = opaque;
2355 TCPCharDriver *s = chr->opaque;
2356 if (!s->connected)
2357 return 0;
2358 s->max_size = qemu_chr_be_can_write(chr);
2359 return s->max_size;
2360 }
2361
2362 #define IAC 255
2363 #define IAC_BREAK 243
2364 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2365 TCPCharDriver *s,
2366 uint8_t *buf, int *size)
2367 {
2368 /* Handle any telnet client's basic IAC options to satisfy char by
2369 * char mode with no echo. All IAC options will be removed from
2370 * the buf and the do_telnetopt variable will be used to track the
2371 * state of the width of the IAC information.
2372 *
2373 * IAC commands come in sets of 3 bytes with the exception of the
2374 * "IAC BREAK" command and the double IAC.
2375 */
2376
2377 int i;
2378 int j = 0;
2379
2380 for (i = 0; i < *size; i++) {
2381 if (s->do_telnetopt > 1) {
2382 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2383 /* Double IAC means send an IAC */
2384 if (j != i)
2385 buf[j] = buf[i];
2386 j++;
2387 s->do_telnetopt = 1;
2388 } else {
2389 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2390 /* Handle IAC break commands by sending a serial break */
2391 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2392 s->do_telnetopt++;
2393 }
2394 s->do_telnetopt++;
2395 }
2396 if (s->do_telnetopt >= 4) {
2397 s->do_telnetopt = 1;
2398 }
2399 } else {
2400 if ((unsigned char)buf[i] == IAC) {
2401 s->do_telnetopt = 2;
2402 } else {
2403 if (j != i)
2404 buf[j] = buf[i];
2405 j++;
2406 }
2407 }
2408 }
2409 *size = j;
2410 }
2411
2412 static int tcp_get_msgfd(CharDriverState *chr)
2413 {
2414 TCPCharDriver *s = chr->opaque;
2415 int fd = s->msgfd;
2416 s->msgfd = -1;
2417 return fd;
2418 }
2419
2420 #ifndef _WIN32
2421 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2422 {
2423 TCPCharDriver *s = chr->opaque;
2424 struct cmsghdr *cmsg;
2425
2426 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2427 int fd;
2428
2429 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2430 cmsg->cmsg_level != SOL_SOCKET ||
2431 cmsg->cmsg_type != SCM_RIGHTS)
2432 continue;
2433
2434 fd = *((int *)CMSG_DATA(cmsg));
2435 if (fd < 0)
2436 continue;
2437
2438 #ifndef MSG_CMSG_CLOEXEC
2439 qemu_set_cloexec(fd);
2440 #endif
2441 if (s->msgfd != -1)
2442 close(s->msgfd);
2443 s->msgfd = fd;
2444 }
2445 }
2446
2447 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2448 {
2449 TCPCharDriver *s = chr->opaque;
2450 struct msghdr msg = { NULL, };
2451 struct iovec iov[1];
2452 union {
2453 struct cmsghdr cmsg;
2454 char control[CMSG_SPACE(sizeof(int))];
2455 } msg_control;
2456 int flags = 0;
2457 ssize_t ret;
2458
2459 iov[0].iov_base = buf;
2460 iov[0].iov_len = len;
2461
2462 msg.msg_iov = iov;
2463 msg.msg_iovlen = 1;
2464 msg.msg_control = &msg_control;
2465 msg.msg_controllen = sizeof(msg_control);
2466
2467 #ifdef MSG_CMSG_CLOEXEC
2468 flags |= MSG_CMSG_CLOEXEC;
2469 #endif
2470 ret = recvmsg(s->fd, &msg, flags);
2471 if (ret > 0 && s->is_unix) {
2472 unix_process_msgfd(chr, &msg);
2473 }
2474
2475 return ret;
2476 }
2477 #else
2478 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2479 {
2480 TCPCharDriver *s = chr->opaque;
2481 return qemu_recv(s->fd, buf, len, 0);
2482 }
2483 #endif
2484
2485 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2486 {
2487 TCPCharDriver *s = chr->opaque;
2488 return g_io_create_watch(s->chan, cond);
2489 }
2490
2491 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2492 {
2493 CharDriverState *chr = opaque;
2494 TCPCharDriver *s = chr->opaque;
2495 uint8_t buf[READ_BUF_LEN];
2496 int len, size;
2497
2498 if (!s->connected || s->max_size <= 0) {
2499 return FALSE;
2500 }
2501 len = sizeof(buf);
2502 if (len > s->max_size)
2503 len = s->max_size;
2504 size = tcp_chr_recv(chr, (void *)buf, len);
2505 if (size == 0) {
2506 /* connection closed */
2507 s->connected = 0;
2508 if (s->listen_chan) {
2509 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2510 }
2511 g_source_remove(s->tag);
2512 s->tag = 0;
2513 g_io_channel_unref(s->chan);
2514 s->chan = NULL;
2515 closesocket(s->fd);
2516 s->fd = -1;
2517 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2518 } else if (size > 0) {
2519 if (s->do_telnetopt)
2520 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2521 if (size > 0)
2522 qemu_chr_be_write(chr, buf, size);
2523 }
2524
2525 return TRUE;
2526 }
2527
2528 #ifndef _WIN32
2529 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2530 {
2531 return qemu_chr_open_fd(eventfd, eventfd);
2532 }
2533 #endif
2534
2535 static void tcp_chr_connect(void *opaque)
2536 {
2537 CharDriverState *chr = opaque;
2538 TCPCharDriver *s = chr->opaque;
2539
2540 s->connected = 1;
2541 if (s->chan) {
2542 s->tag = io_add_watch_poll(s->chan, tcp_chr_read_poll, tcp_chr_read, chr);
2543 }
2544 qemu_chr_generic_open(chr);
2545 }
2546
2547 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2548 static void tcp_chr_telnet_init(int fd)
2549 {
2550 char buf[3];
2551 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2552 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2553 send(fd, (char *)buf, 3, 0);
2554 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2555 send(fd, (char *)buf, 3, 0);
2556 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2557 send(fd, (char *)buf, 3, 0);
2558 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2559 send(fd, (char *)buf, 3, 0);
2560 }
2561
2562 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2563 {
2564 TCPCharDriver *s = chr->opaque;
2565 if (s->fd != -1)
2566 return -1;
2567
2568 socket_set_nonblock(fd);
2569 if (s->do_nodelay)
2570 socket_set_nodelay(fd);
2571 s->fd = fd;
2572 s->chan = io_channel_from_socket(fd);
2573 g_source_remove(s->listen_tag);
2574 s->listen_tag = 0;
2575 tcp_chr_connect(chr);
2576
2577 return 0;
2578 }
2579
2580 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
2581 {
2582 CharDriverState *chr = opaque;
2583 TCPCharDriver *s = chr->opaque;
2584 struct sockaddr_in saddr;
2585 #ifndef _WIN32
2586 struct sockaddr_un uaddr;
2587 #endif
2588 struct sockaddr *addr;
2589 socklen_t len;
2590 int fd;
2591
2592 for(;;) {
2593 #ifndef _WIN32
2594 if (s->is_unix) {
2595 len = sizeof(uaddr);
2596 addr = (struct sockaddr *)&uaddr;
2597 } else
2598 #endif
2599 {
2600 len = sizeof(saddr);
2601 addr = (struct sockaddr *)&saddr;
2602 }
2603 fd = qemu_accept(s->listen_fd, addr, &len);
2604 if (fd < 0 && errno != EINTR) {
2605 return FALSE;
2606 } else if (fd >= 0) {
2607 if (s->do_telnetopt)
2608 tcp_chr_telnet_init(fd);
2609 break;
2610 }
2611 }
2612 if (tcp_chr_add_client(chr, fd) < 0)
2613 close(fd);
2614
2615 return TRUE;
2616 }
2617
2618 static void tcp_chr_close(CharDriverState *chr)
2619 {
2620 TCPCharDriver *s = chr->opaque;
2621 if (s->fd >= 0) {
2622 if (s->tag) {
2623 g_source_remove(s->tag);
2624 }
2625 if (s->chan) {
2626 g_io_channel_unref(s->chan);
2627 }
2628 closesocket(s->fd);
2629 }
2630 if (s->listen_fd >= 0) {
2631 if (s->listen_tag) {
2632 g_source_remove(s->listen_tag);
2633 }
2634 if (s->listen_chan) {
2635 g_io_channel_unref(s->listen_chan);
2636 }
2637 closesocket(s->listen_fd);
2638 }
2639 g_free(s);
2640 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2641 }
2642
2643 static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
2644 bool is_listen, bool is_telnet,
2645 bool is_waitconnect,
2646 Error **errp)
2647 {
2648 CharDriverState *chr = NULL;
2649 TCPCharDriver *s = NULL;
2650 char host[NI_MAXHOST], serv[NI_MAXSERV];
2651 const char *left = "", *right = "";
2652 struct sockaddr_storage ss;
2653 socklen_t ss_len = sizeof(ss);
2654
2655 memset(&ss, 0, ss_len);
2656 if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2657 error_setg(errp, "getsockname: %s", strerror(errno));
2658 return NULL;
2659 }
2660
2661 chr = g_malloc0(sizeof(CharDriverState));
2662 s = g_malloc0(sizeof(TCPCharDriver));
2663
2664 s->connected = 0;
2665 s->fd = -1;
2666 s->listen_fd = -1;
2667 s->msgfd = -1;
2668
2669 chr->filename = g_malloc(256);
2670 switch (ss.ss_family) {
2671 #ifndef _WIN32
2672 case AF_UNIX:
2673 s->is_unix = 1;
2674 snprintf(chr->filename, 256, "unix:%s%s",
2675 ((struct sockaddr_un *)(&ss))->sun_path,
2676 is_listen ? ",server" : "");
2677 break;
2678 #endif
2679 case AF_INET6:
2680 left = "[";
2681 right = "]";
2682 /* fall through */
2683 case AF_INET:
2684 s->do_nodelay = do_nodelay;
2685 getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
2686 serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
2687 snprintf(chr->filename, 256, "%s:%s:%s%s%s%s",
2688 is_telnet ? "telnet" : "tcp",
2689 left, host, right, serv,
2690 is_listen ? ",server" : "");
2691 break;
2692 }
2693
2694 chr->opaque = s;
2695 chr->chr_write = tcp_chr_write;
2696 chr->chr_close = tcp_chr_close;
2697 chr->get_msgfd = tcp_get_msgfd;
2698 chr->chr_add_client = tcp_chr_add_client;
2699 chr->chr_add_watch = tcp_chr_add_watch;
2700
2701 if (is_listen) {
2702 s->listen_fd = fd;
2703 s->listen_chan = io_channel_from_socket(s->listen_fd);
2704 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2705 if (is_telnet) {
2706 s->do_telnetopt = 1;
2707 }
2708 } else {
2709 s->connected = 1;
2710 s->fd = fd;
2711 socket_set_nodelay(fd);
2712 s->chan = io_channel_from_socket(s->fd);
2713 tcp_chr_connect(chr);
2714 }
2715
2716 if (is_listen && is_waitconnect) {
2717 printf("QEMU waiting for connection on: %s\n",
2718 chr->filename);
2719 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
2720 socket_set_nonblock(s->listen_fd);
2721 }
2722 return chr;
2723 }
2724
2725 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2726 {
2727 CharDriverState *chr = NULL;
2728 Error *local_err = NULL;
2729 int fd = -1;
2730 int is_listen;
2731 int is_waitconnect;
2732 int do_nodelay;
2733 int is_unix;
2734 int is_telnet;
2735
2736 is_listen = qemu_opt_get_bool(opts, "server", 0);
2737 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2738 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2739 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2740 is_unix = qemu_opt_get(opts, "path") != NULL;
2741 if (!is_listen)
2742 is_waitconnect = 0;
2743
2744 if (is_unix) {
2745 if (is_listen) {
2746 fd = unix_listen_opts(opts, &local_err);
2747 } else {
2748 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
2749 }
2750 } else {
2751 if (is_listen) {
2752 fd = inet_listen_opts(opts, 0, &local_err);
2753 } else {
2754 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
2755 }
2756 }
2757 if (fd < 0) {
2758 goto fail;
2759 }
2760
2761 if (!is_waitconnect)
2762 socket_set_nonblock(fd);
2763
2764 chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet,
2765 is_waitconnect, &local_err);
2766 if (error_is_set(&local_err)) {
2767 goto fail;
2768 }
2769 return chr;
2770
2771
2772 fail:
2773 if (local_err) {
2774 qerror_report_err(local_err);
2775 error_free(local_err);
2776 }
2777 if (fd >= 0) {
2778 closesocket(fd);
2779 }
2780 if (chr) {
2781 g_free(chr->opaque);
2782 g_free(chr);
2783 }
2784 return NULL;
2785 }
2786
2787 /***********************************************************/
2788 /* Memory chardev */
2789 typedef struct {
2790 size_t outbuf_size;
2791 size_t outbuf_capacity;
2792 uint8_t *outbuf;
2793 } MemoryDriver;
2794
2795 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2796 {
2797 MemoryDriver *d = chr->opaque;
2798
2799 /* TODO: the QString implementation has the same code, we should
2800 * introduce a generic way to do this in cutils.c */
2801 if (d->outbuf_capacity < d->outbuf_size + len) {
2802 /* grow outbuf */
2803 d->outbuf_capacity += len;
2804 d->outbuf_capacity *= 2;
2805 d->outbuf = g_realloc(d->outbuf, d->outbuf_capacity);
2806 }
2807
2808 memcpy(d->outbuf + d->outbuf_size, buf, len);
2809 d->outbuf_size += len;
2810
2811 return len;
2812 }
2813
2814 void qemu_chr_init_mem(CharDriverState *chr)
2815 {
2816 MemoryDriver *d;
2817
2818 d = g_malloc(sizeof(*d));
2819 d->outbuf_size = 0;
2820 d->outbuf_capacity = 4096;
2821 d->outbuf = g_malloc0(d->outbuf_capacity);
2822
2823 memset(chr, 0, sizeof(*chr));
2824 chr->opaque = d;
2825 chr->chr_write = mem_chr_write;
2826 }
2827
2828 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2829 {
2830 MemoryDriver *d = chr->opaque;
2831 return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2832 }
2833
2834 /* NOTE: this driver can not be closed with qemu_chr_delete()! */
2835 void qemu_chr_close_mem(CharDriverState *chr)
2836 {
2837 MemoryDriver *d = chr->opaque;
2838
2839 g_free(d->outbuf);
2840 g_free(chr->opaque);
2841 chr->opaque = NULL;
2842 chr->chr_write = NULL;
2843 }
2844
2845 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2846 {
2847 const MemoryDriver *d = chr->opaque;
2848 return d->outbuf_size;
2849 }
2850
2851 /*********************************************************/
2852 /* Ring buffer chardev */
2853
2854 typedef struct {
2855 size_t size;
2856 size_t prod;
2857 size_t cons;
2858 uint8_t *cbuf;
2859 } RingBufCharDriver;
2860
2861 static size_t ringbuf_count(const CharDriverState *chr)
2862 {
2863 const RingBufCharDriver *d = chr->opaque;
2864
2865 return d->prod - d->cons;
2866 }
2867
2868 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2869 {
2870 RingBufCharDriver *d = chr->opaque;
2871 int i;
2872
2873 if (!buf || (len < 0)) {
2874 return -1;
2875 }
2876
2877 for (i = 0; i < len; i++ ) {
2878 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
2879 if (d->prod - d->cons > d->size) {
2880 d->cons = d->prod - d->size;
2881 }
2882 }
2883
2884 return 0;
2885 }
2886
2887 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
2888 {
2889 RingBufCharDriver *d = chr->opaque;
2890 int i;
2891
2892 for (i = 0; i < len && d->cons != d->prod; i++) {
2893 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
2894 }
2895
2896 return i;
2897 }
2898
2899 static void ringbuf_chr_close(struct CharDriverState *chr)
2900 {
2901 RingBufCharDriver *d = chr->opaque;
2902
2903 g_free(d->cbuf);
2904 g_free(d);
2905 chr->opaque = NULL;
2906 }
2907
2908 static CharDriverState *qemu_chr_open_ringbuf(QemuOpts *opts)
2909 {
2910 CharDriverState *chr;
2911 RingBufCharDriver *d;
2912
2913 chr = g_malloc0(sizeof(CharDriverState));
2914 d = g_malloc(sizeof(*d));
2915
2916 d->size = qemu_opt_get_size(opts, "size", 0);
2917 if (d->size == 0) {
2918 d->size = 65536;
2919 }
2920
2921 /* The size must be power of 2 */
2922 if (d->size & (d->size - 1)) {
2923 error_report("size of ringbuf device must be power of two");
2924 goto fail;
2925 }
2926
2927 d->prod = 0;
2928 d->cons = 0;
2929 d->cbuf = g_malloc0(d->size);
2930
2931 chr->opaque = d;
2932 chr->chr_write = ringbuf_chr_write;
2933 chr->chr_close = ringbuf_chr_close;
2934
2935 return chr;
2936
2937 fail:
2938 g_free(d);
2939 g_free(chr);
2940 return NULL;
2941 }
2942
2943 static bool chr_is_ringbuf(const CharDriverState *chr)
2944 {
2945 return chr->chr_write == ringbuf_chr_write;
2946 }
2947
2948 void qmp_ringbuf_write(const char *device, const char *data,
2949 bool has_format, enum DataFormat format,
2950 Error **errp)
2951 {
2952 CharDriverState *chr;
2953 const uint8_t *write_data;
2954 int ret;
2955 size_t write_count;
2956
2957 chr = qemu_chr_find(device);
2958 if (!chr) {
2959 error_setg(errp, "Device '%s' not found", device);
2960 return;
2961 }
2962
2963 if (!chr_is_ringbuf(chr)) {
2964 error_setg(errp,"%s is not a ringbuf device", device);
2965 return;
2966 }
2967
2968 if (has_format && (format == DATA_FORMAT_BASE64)) {
2969 write_data = g_base64_decode(data, &write_count);
2970 } else {
2971 write_data = (uint8_t *)data;
2972 write_count = strlen(data);
2973 }
2974
2975 ret = ringbuf_chr_write(chr, write_data, write_count);
2976
2977 if (write_data != (uint8_t *)data) {
2978 g_free((void *)write_data);
2979 }
2980
2981 if (ret < 0) {
2982 error_setg(errp, "Failed to write to device %s", device);
2983 return;
2984 }
2985 }
2986
2987 char *qmp_ringbuf_read(const char *device, int64_t size,
2988 bool has_format, enum DataFormat format,
2989 Error **errp)
2990 {
2991 CharDriverState *chr;
2992 uint8_t *read_data;
2993 size_t count;
2994 char *data;
2995
2996 chr = qemu_chr_find(device);
2997 if (!chr) {
2998 error_setg(errp, "Device '%s' not found", device);
2999 return NULL;
3000 }
3001
3002 if (!chr_is_ringbuf(chr)) {
3003 error_setg(errp,"%s is not a ringbuf device", device);
3004 return NULL;
3005 }
3006
3007 if (size <= 0) {
3008 error_setg(errp, "size must be greater than zero");
3009 return NULL;
3010 }
3011
3012 count = ringbuf_count(chr);
3013 size = size > count ? count : size;
3014 read_data = g_malloc(size + 1);
3015
3016 ringbuf_chr_read(chr, read_data, size);
3017
3018 if (has_format && (format == DATA_FORMAT_BASE64)) {
3019 data = g_base64_encode(read_data, size);
3020 g_free(read_data);
3021 } else {
3022 /*
3023 * FIXME should read only complete, valid UTF-8 characters up
3024 * to @size bytes. Invalid sequences should be replaced by a
3025 * suitable replacement character. Except when (and only
3026 * when) ring buffer lost characters since last read, initial
3027 * continuation characters should be dropped.
3028 */
3029 read_data[size] = 0;
3030 data = (char *)read_data;
3031 }
3032
3033 return data;
3034 }
3035
3036 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
3037 {
3038 char host[65], port[33], width[8], height[8];
3039 int pos;
3040 const char *p;
3041 QemuOpts *opts;
3042 Error *local_err = NULL;
3043
3044 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
3045 if (error_is_set(&local_err)) {
3046 qerror_report_err(local_err);
3047 error_free(local_err);
3048 return NULL;
3049 }
3050
3051 if (strstart(filename, "mon:", &p)) {
3052 filename = p;
3053 qemu_opt_set(opts, "mux", "on");
3054 }
3055
3056 if (strcmp(filename, "null") == 0 ||
3057 strcmp(filename, "pty") == 0 ||
3058 strcmp(filename, "msmouse") == 0 ||
3059 strcmp(filename, "braille") == 0 ||
3060 strcmp(filename, "stdio") == 0) {
3061 qemu_opt_set(opts, "backend", filename);
3062 return opts;
3063 }
3064 if (strstart(filename, "vc", &p)) {
3065 qemu_opt_set(opts, "backend", "vc");
3066 if (*p == ':') {
3067 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
3068 /* pixels */
3069 qemu_opt_set(opts, "width", width);
3070 qemu_opt_set(opts, "height", height);
3071 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
3072 /* chars */
3073 qemu_opt_set(opts, "cols", width);
3074 qemu_opt_set(opts, "rows", height);
3075 } else {
3076 goto fail;
3077 }
3078 }
3079 return opts;
3080 }
3081 if (strcmp(filename, "con:") == 0) {
3082 qemu_opt_set(opts, "backend", "console");
3083 return opts;
3084 }
3085 if (strstart(filename, "COM", NULL)) {
3086 qemu_opt_set(opts, "backend", "serial");
3087 qemu_opt_set(opts, "path", filename);
3088 return opts;
3089 }
3090 if (strstart(filename, "file:", &p)) {
3091 qemu_opt_set(opts, "backend", "file");
3092 qemu_opt_set(opts, "path", p);
3093 return opts;
3094 }
3095 if (strstart(filename, "pipe:", &p)) {
3096 qemu_opt_set(opts, "backend", "pipe");
3097 qemu_opt_set(opts, "path", p);
3098 return opts;
3099 }
3100 if (strstart(filename, "tcp:", &p) ||
3101 strstart(filename, "telnet:", &p)) {
3102 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3103 host[0] = 0;
3104 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3105 goto fail;
3106 }
3107 qemu_opt_set(opts, "backend", "socket");
3108 qemu_opt_set(opts, "host", host);
3109 qemu_opt_set(opts, "port", port);
3110 if (p[pos] == ',') {
3111 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
3112 goto fail;
3113 }
3114 if (strstart(filename, "telnet:", &p))
3115 qemu_opt_set(opts, "telnet", "on");
3116 return opts;
3117 }
3118 if (strstart(filename, "udp:", &p)) {
3119 qemu_opt_set(opts, "backend", "udp");
3120 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3121 host[0] = 0;
3122 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3123 goto fail;
3124 }
3125 }
3126 qemu_opt_set(opts, "host", host);
3127 qemu_opt_set(opts, "port", port);
3128 if (p[pos] == '@') {
3129 p += pos + 1;
3130 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3131 host[0] = 0;
3132 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3133 goto fail;
3134 }
3135 }
3136 qemu_opt_set(opts, "localaddr", host);
3137 qemu_opt_set(opts, "localport", port);
3138 }
3139 return opts;
3140 }
3141 if (strstart(filename, "unix:", &p)) {
3142 qemu_opt_set(opts, "backend", "socket");
3143 if (qemu_opts_do_parse(opts, p, "path") != 0)
3144 goto fail;
3145 return opts;
3146 }
3147 if (strstart(filename, "/dev/parport", NULL) ||
3148 strstart(filename, "/dev/ppi", NULL)) {
3149 qemu_opt_set(opts, "backend", "parport");
3150 qemu_opt_set(opts, "path", filename);
3151 return opts;
3152 }
3153 if (strstart(filename, "/dev/", NULL)) {
3154 qemu_opt_set(opts, "backend", "tty");
3155 qemu_opt_set(opts, "path", filename);
3156 return opts;
3157 }
3158
3159 fail:
3160 qemu_opts_del(opts);
3161 return NULL;
3162 }
3163
3164 #ifdef HAVE_CHARDEV_PARPORT
3165
3166 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
3167 {
3168 const char *filename = qemu_opt_get(opts, "path");
3169 int fd;
3170
3171 fd = qemu_open(filename, O_RDWR);
3172 if (fd < 0) {
3173 return NULL;
3174 }
3175 return qemu_chr_open_pp_fd(fd);
3176 }
3177
3178 #endif
3179
3180 typedef struct CharDriver {
3181 const char *name;
3182 CharDriverState *(*open)(QemuOpts *opts);
3183 } CharDriver;
3184
3185 static GSList *backends;
3186
3187 void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *))
3188 {
3189 CharDriver *s;
3190
3191 s = g_malloc0(sizeof(*s));
3192 s->name = g_strdup(name);
3193 s->open = open;
3194
3195 backends = g_slist_append(backends, s);
3196 }
3197
3198 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3199 void (*init)(struct CharDriverState *s),
3200 Error **errp)
3201 {
3202 CharDriver *cd;
3203 CharDriverState *chr;
3204 GSList *i;
3205
3206 if (qemu_opts_id(opts) == NULL) {
3207 error_setg(errp, "chardev: no id specified");
3208 goto err;
3209 }
3210
3211 if (qemu_opt_get(opts, "backend") == NULL) {
3212 error_setg(errp, "chardev: \"%s\" missing backend",
3213 qemu_opts_id(opts));
3214 goto err;
3215 }
3216 for (i = backends; i; i = i->next) {
3217 cd = i->data;
3218
3219 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3220 break;
3221 }
3222 }
3223 if (i == NULL) {
3224 error_setg(errp, "chardev: backend \"%s\" not found",
3225 qemu_opt_get(opts, "backend"));
3226 return NULL;
3227 }
3228
3229 chr = cd->open(opts);
3230 if (!chr) {
3231 error_setg(errp, "chardev: opening backend \"%s\" failed",
3232 qemu_opt_get(opts, "backend"));
3233 goto err;
3234 }
3235
3236 if (!chr->filename)
3237 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
3238 chr->init = init;
3239 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3240
3241 if (qemu_opt_get_bool(opts, "mux", 0)) {
3242 CharDriverState *base = chr;
3243 int len = strlen(qemu_opts_id(opts)) + 6;
3244 base->label = g_malloc(len);
3245 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
3246 chr = qemu_chr_open_mux(base);
3247 chr->filename = base->filename;
3248 chr->avail_connections = MAX_MUX;
3249 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3250 } else {
3251 chr->avail_connections = 1;
3252 }
3253 chr->label = g_strdup(qemu_opts_id(opts));
3254 chr->opts = opts;
3255 return chr;
3256
3257 err:
3258 qemu_opts_del(opts);
3259 return NULL;
3260 }
3261
3262 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3263 {
3264 const char *p;
3265 CharDriverState *chr;
3266 QemuOpts *opts;
3267 Error *err = NULL;
3268
3269 if (strstart(filename, "chardev:", &p)) {
3270 return qemu_chr_find(p);
3271 }
3272
3273 opts = qemu_chr_parse_compat(label, filename);
3274 if (!opts)
3275 return NULL;
3276
3277 chr = qemu_chr_new_from_opts(opts, init, &err);
3278 if (error_is_set(&err)) {
3279 fprintf(stderr, "%s\n", error_get_pretty(err));
3280 error_free(err);
3281 }
3282 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3283 monitor_init(chr, MONITOR_USE_READLINE);
3284 }
3285 return chr;
3286 }
3287
3288 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3289 {
3290 if (chr->chr_set_echo) {
3291 chr->chr_set_echo(chr, echo);
3292 }
3293 }
3294
3295 void qemu_chr_fe_open(struct CharDriverState *chr)
3296 {
3297 if (chr->chr_guest_open) {
3298 chr->chr_guest_open(chr);
3299 }
3300 }
3301
3302 void qemu_chr_fe_close(struct CharDriverState *chr)
3303 {
3304 if (chr->chr_guest_close) {
3305 chr->chr_guest_close(chr);
3306 }
3307 }
3308
3309 guint qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3310 GIOFunc func, void *user_data)
3311 {
3312 GSource *src;
3313 guint tag;
3314
3315 if (s->chr_add_watch == NULL) {
3316 return -ENOSYS;
3317 }
3318
3319 src = s->chr_add_watch(s, cond);
3320 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3321 tag = g_source_attach(src, NULL);
3322 g_source_unref(src);
3323
3324 return tag;
3325 }
3326
3327 void qemu_chr_delete(CharDriverState *chr)
3328 {
3329 QTAILQ_REMOVE(&chardevs, chr, next);
3330 if (chr->chr_close) {
3331 chr->chr_close(chr);
3332 }
3333 g_free(chr->filename);
3334 g_free(chr->label);
3335 if (chr->opts) {
3336 qemu_opts_del(chr->opts);
3337 }
3338 g_free(chr);
3339 }
3340
3341 ChardevInfoList *qmp_query_chardev(Error **errp)
3342 {
3343 ChardevInfoList *chr_list = NULL;
3344 CharDriverState *chr;
3345
3346 QTAILQ_FOREACH(chr, &chardevs, next) {
3347 ChardevInfoList *info = g_malloc0(sizeof(*info));
3348 info->value = g_malloc0(sizeof(*info->value));
3349 info->value->label = g_strdup(chr->label);
3350 info->value->filename = g_strdup(chr->filename);
3351
3352 info->next = chr_list;
3353 chr_list = info;
3354 }
3355
3356 return chr_list;
3357 }
3358
3359 CharDriverState *qemu_chr_find(const char *name)
3360 {
3361 CharDriverState *chr;
3362
3363 QTAILQ_FOREACH(chr, &chardevs, next) {
3364 if (strcmp(chr->label, name) != 0)
3365 continue;
3366 return chr;
3367 }
3368 return NULL;
3369 }
3370
3371 /* Get a character (serial) device interface. */
3372 CharDriverState *qemu_char_get_next_serial(void)
3373 {
3374 static int next_serial;
3375
3376 /* FIXME: This function needs to go away: use chardev properties! */
3377 return serial_hds[next_serial++];
3378 }
3379
3380 QemuOptsList qemu_chardev_opts = {
3381 .name = "chardev",
3382 .implied_opt_name = "backend",
3383 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3384 .desc = {
3385 {
3386 .name = "backend",
3387 .type = QEMU_OPT_STRING,
3388 },{
3389 .name = "path",
3390 .type = QEMU_OPT_STRING,
3391 },{
3392 .name = "host",
3393 .type = QEMU_OPT_STRING,
3394 },{
3395 .name = "port",
3396 .type = QEMU_OPT_STRING,
3397 },{
3398 .name = "localaddr",
3399 .type = QEMU_OPT_STRING,
3400 },{
3401 .name = "localport",
3402 .type = QEMU_OPT_STRING,
3403 },{
3404 .name = "to",
3405 .type = QEMU_OPT_NUMBER,
3406 },{
3407 .name = "ipv4",
3408 .type = QEMU_OPT_BOOL,
3409 },{
3410 .name = "ipv6",
3411 .type = QEMU_OPT_BOOL,
3412 },{
3413 .name = "wait",
3414 .type = QEMU_OPT_BOOL,
3415 },{
3416 .name = "server",
3417 .type = QEMU_OPT_BOOL,
3418 },{
3419 .name = "delay",
3420 .type = QEMU_OPT_BOOL,
3421 },{
3422 .name = "telnet",
3423 .type = QEMU_OPT_BOOL,
3424 },{
3425 .name = "width",
3426 .type = QEMU_OPT_NUMBER,
3427 },{
3428 .name = "height",
3429 .type = QEMU_OPT_NUMBER,
3430 },{
3431 .name = "cols",
3432 .type = QEMU_OPT_NUMBER,
3433 },{
3434 .name = "rows",
3435 .type = QEMU_OPT_NUMBER,
3436 },{
3437 .name = "mux",
3438 .type = QEMU_OPT_BOOL,
3439 },{
3440 .name = "signal",
3441 .type = QEMU_OPT_BOOL,
3442 },{
3443 .name = "name",
3444 .type = QEMU_OPT_STRING,
3445 },{
3446 .name = "debug",
3447 .type = QEMU_OPT_NUMBER,
3448 },{
3449 .name = "size",
3450 .type = QEMU_OPT_SIZE,
3451 },
3452 { /* end of list */ }
3453 },
3454 };
3455
3456 #ifdef _WIN32
3457
3458 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3459 {
3460 HANDLE out;
3461
3462 if (file->in) {
3463 error_setg(errp, "input file not supported");
3464 return NULL;
3465 }
3466
3467 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
3468 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
3469 if (out == INVALID_HANDLE_VALUE) {
3470 error_setg(errp, "open %s failed", file->out);
3471 return NULL;
3472 }
3473 return qemu_chr_open_win_file(out);
3474 }
3475
3476 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3477 Error **errp)
3478 {
3479 return qemu_chr_open_win_path(serial->device);
3480 }
3481
3482 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3483 Error **errp)
3484 {
3485 error_setg(errp, "character device backend type 'parallel' not supported");
3486 return NULL;
3487 }
3488
3489 #else /* WIN32 */
3490
3491 static int qmp_chardev_open_file_source(char *src, int flags,
3492 Error **errp)
3493 {
3494 int fd = -1;
3495
3496 TFR(fd = qemu_open(src, flags, 0666));
3497 if (fd == -1) {
3498 error_setg(errp, "open %s: %s", src, strerror(errno));
3499 }
3500 return fd;
3501 }
3502
3503 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3504 {
3505 int flags, in = -1, out = -1;
3506
3507 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
3508 out = qmp_chardev_open_file_source(file->out, flags, errp);
3509 if (error_is_set(errp)) {
3510 return NULL;
3511 }
3512
3513 if (file->in) {
3514 flags = O_RDONLY;
3515 in = qmp_chardev_open_file_source(file->in, flags, errp);
3516 if (error_is_set(errp)) {
3517 qemu_close(out);
3518 return NULL;
3519 }
3520 }
3521
3522 return qemu_chr_open_fd(in, out);
3523 }
3524
3525 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3526 Error **errp)
3527 {
3528 #ifdef HAVE_CHARDEV_TTY
3529 int fd;
3530
3531 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
3532 if (error_is_set(errp)) {
3533 return NULL;
3534 }
3535 socket_set_nonblock(fd);
3536 return qemu_chr_open_tty_fd(fd);
3537 #else
3538 error_setg(errp, "character device backend type 'serial' not supported");
3539 return NULL;
3540 #endif
3541 }
3542
3543 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3544 Error **errp)
3545 {
3546 #ifdef HAVE_CHARDEV_PARPORT
3547 int fd;
3548
3549 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
3550 if (error_is_set(errp)) {
3551 return NULL;
3552 }
3553 return qemu_chr_open_pp_fd(fd);
3554 #else
3555 error_setg(errp, "character device backend type 'parallel' not supported");
3556 return NULL;
3557 #endif
3558 }
3559
3560 #endif /* WIN32 */
3561
3562 static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
3563 Error **errp)
3564 {
3565 SocketAddress *addr = sock->addr;
3566 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
3567 bool is_listen = sock->has_server ? sock->server : true;
3568 bool is_telnet = sock->has_telnet ? sock->telnet : false;
3569 bool is_waitconnect = sock->has_wait ? sock->wait : false;
3570 int fd;
3571
3572 if (is_listen) {
3573 fd = socket_listen(addr, errp);
3574 } else {
3575 fd = socket_connect(addr, errp, NULL, NULL);
3576 }
3577 if (error_is_set(errp)) {
3578 return NULL;
3579 }
3580 return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
3581 is_telnet, is_waitconnect, errp);
3582 }
3583
3584 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
3585 Error **errp)
3586 {
3587 ChardevReturn *ret = g_new0(ChardevReturn, 1);
3588 CharDriverState *chr = NULL;
3589
3590 chr = qemu_chr_find(id);
3591 if (chr) {
3592 error_setg(errp, "Chardev '%s' already exists", id);
3593 g_free(ret);
3594 return NULL;
3595 }
3596
3597 switch (backend->kind) {
3598 case CHARDEV_BACKEND_KIND_FILE:
3599 chr = qmp_chardev_open_file(backend->file, errp);
3600 break;
3601 case CHARDEV_BACKEND_KIND_SERIAL:
3602 chr = qmp_chardev_open_serial(backend->serial, errp);
3603 break;
3604 case CHARDEV_BACKEND_KIND_PARALLEL:
3605 chr = qmp_chardev_open_parallel(backend->parallel, errp);
3606 break;
3607 case CHARDEV_BACKEND_KIND_SOCKET:
3608 chr = qmp_chardev_open_socket(backend->socket, errp);
3609 break;
3610 #ifdef HAVE_CHARDEV_TTY
3611 case CHARDEV_BACKEND_KIND_PTY:
3612 {
3613 /* qemu_chr_open_pty sets "path" in opts */
3614 QemuOpts *opts;
3615 opts = qemu_opts_create_nofail(qemu_find_opts("chardev"));
3616 chr = qemu_chr_open_pty(opts);
3617 ret->pty = g_strdup(qemu_opt_get(opts, "path"));
3618 ret->has_pty = true;
3619 qemu_opts_del(opts);
3620 break;
3621 }
3622 #endif
3623 case CHARDEV_BACKEND_KIND_NULL:
3624 chr = qemu_chr_open_null(NULL);
3625 break;
3626 default:
3627 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
3628 break;
3629 }
3630
3631 if (chr == NULL && !error_is_set(errp)) {
3632 error_setg(errp, "Failed to create chardev");
3633 }
3634 if (chr) {
3635 chr->label = g_strdup(id);
3636 chr->avail_connections = 1;
3637 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3638 return ret;
3639 } else {
3640 g_free(ret);
3641 return NULL;
3642 }
3643 }
3644
3645 void qmp_chardev_remove(const char *id, Error **errp)
3646 {
3647 CharDriverState *chr;
3648
3649 chr = qemu_chr_find(id);
3650 if (NULL == chr) {
3651 error_setg(errp, "Chardev '%s' not found", id);
3652 return;
3653 }
3654 if (chr->chr_can_read || chr->chr_read ||
3655 chr->chr_event || chr->handler_opaque) {
3656 error_setg(errp, "Chardev '%s' is busy", id);
3657 return;
3658 }
3659 qemu_chr_delete(chr);
3660 }
3661
3662 static void register_types(void)
3663 {
3664 register_char_driver("null", qemu_chr_open_null);
3665 register_char_driver("socket", qemu_chr_open_socket);
3666 register_char_driver("udp", qemu_chr_open_udp);
3667 register_char_driver("msmouse", qemu_chr_open_msmouse);
3668 register_char_driver("vc", vc_init);
3669 register_char_driver("memory", qemu_chr_open_ringbuf);
3670 #ifdef _WIN32
3671 register_char_driver("file", qemu_chr_open_win_file_out);
3672 register_char_driver("pipe", qemu_chr_open_win_pipe);
3673 register_char_driver("console", qemu_chr_open_win_con);
3674 register_char_driver("serial", qemu_chr_open_win);
3675 register_char_driver("stdio", qemu_chr_open_win_stdio);
3676 #else
3677 register_char_driver("file", qemu_chr_open_file_out);
3678 register_char_driver("pipe", qemu_chr_open_pipe);
3679 register_char_driver("stdio", qemu_chr_open_stdio);
3680 #endif
3681 #ifdef CONFIG_BRLAPI
3682 register_char_driver("braille", chr_baum_init);
3683 #endif
3684 #ifdef HAVE_CHARDEV_TTY
3685 register_char_driver("tty", qemu_chr_open_tty);
3686 register_char_driver("serial", qemu_chr_open_tty);
3687 register_char_driver("pty", qemu_chr_open_pty);
3688 #endif
3689 #ifdef HAVE_CHARDEV_PARPORT
3690 register_char_driver("parallel", qemu_chr_open_pp);
3691 register_char_driver("parport", qemu_chr_open_pp);
3692 #endif
3693 #ifdef CONFIG_SPICE
3694 register_char_driver("spicevmc", qemu_chr_open_spice);
3695 #if SPICE_SERVER_VERSION >= 0x000c02
3696 register_char_driver("spiceport", qemu_chr_open_spice_port);
3697 #endif
3698 #endif
3699 }
3700
3701 type_init(register_types);
Qemu copy for testing