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Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging
[mirror_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 "sysemu/sysemu.h"
27 #include "qemu/timer.h"
28 #include "sysemu/char.h"
29 #include "hw/usb.h"
30 #include "qmp-commands.h"
31
32 #include <unistd.h>
33 #include <fcntl.h>
34 #include <time.h>
35 #include <errno.h>
36 #include <sys/time.h>
37 #include <zlib.h>
38
39 #ifndef _WIN32
40 #include <sys/times.h>
41 #include <sys/wait.h>
42 #include <termios.h>
43 #include <sys/mman.h>
44 #include <sys/ioctl.h>
45 #include <sys/resource.h>
46 #include <sys/socket.h>
47 #include <netinet/in.h>
48 #include <net/if.h>
49 #include <arpa/inet.h>
50 #include <dirent.h>
51 #include <netdb.h>
52 #include <sys/select.h>
53 #ifdef CONFIG_BSD
54 #include <sys/stat.h>
55 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
56 #include <dev/ppbus/ppi.h>
57 #include <dev/ppbus/ppbconf.h>
58 #elif defined(__DragonFly__)
59 #include <dev/misc/ppi/ppi.h>
60 #include <bus/ppbus/ppbconf.h>
61 #endif
62 #else
63 #ifdef __linux__
64 #include <linux/ppdev.h>
65 #include <linux/parport.h>
66 #endif
67 #ifdef __sun__
68 #include <sys/stat.h>
69 #include <sys/ethernet.h>
70 #include <sys/sockio.h>
71 #include <netinet/arp.h>
72 #include <netinet/in.h>
73 #include <netinet/in_systm.h>
74 #include <netinet/ip.h>
75 #include <netinet/ip_icmp.h> // must come after ip.h
76 #include <netinet/udp.h>
77 #include <netinet/tcp.h>
78 #endif
79 #endif
80 #endif
81
82 #include "qemu/sockets.h"
83 #include "ui/qemu-spice.h"
84
85 #define READ_BUF_LEN 4096
86 #define READ_RETRIES 10
87
88 /***********************************************************/
89 /* character device */
90
91 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
92 QTAILQ_HEAD_INITIALIZER(chardevs);
93
94 CharDriverState *qemu_chr_alloc(void)
95 {
96 CharDriverState *chr = g_malloc0(sizeof(CharDriverState));
97 qemu_mutex_init(&chr->chr_write_lock);
98 return chr;
99 }
100
101 void qemu_chr_be_event(CharDriverState *s, int event)
102 {
103 /* Keep track if the char device is open */
104 switch (event) {
105 case CHR_EVENT_OPENED:
106 s->be_open = 1;
107 break;
108 case CHR_EVENT_CLOSED:
109 s->be_open = 0;
110 break;
111 }
112
113 if (!s->chr_event)
114 return;
115 s->chr_event(s->handler_opaque, event);
116 }
117
118 void qemu_chr_be_generic_open(CharDriverState *s)
119 {
120 qemu_chr_be_event(s, CHR_EVENT_OPENED);
121 }
122
123 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
124 {
125 int ret;
126
127 qemu_mutex_lock(&s->chr_write_lock);
128 ret = s->chr_write(s, buf, len);
129 qemu_mutex_unlock(&s->chr_write_lock);
130 return ret;
131 }
132
133 int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len)
134 {
135 int offset = 0;
136 int res = 0;
137
138 qemu_mutex_lock(&s->chr_write_lock);
139 while (offset < len) {
140 do {
141 res = s->chr_write(s, buf + offset, len - offset);
142 if (res == -1 && errno == EAGAIN) {
143 g_usleep(100);
144 }
145 } while (res == -1 && errno == EAGAIN);
146
147 if (res <= 0) {
148 break;
149 }
150
151 offset += res;
152 }
153 qemu_mutex_unlock(&s->chr_write_lock);
154
155 if (res < 0) {
156 return res;
157 }
158 return offset;
159 }
160
161 int qemu_chr_fe_read_all(CharDriverState *s, uint8_t *buf, int len)
162 {
163 int offset = 0, counter = 10;
164 int res;
165
166 if (!s->chr_sync_read) {
167 return 0;
168 }
169
170 while (offset < len) {
171 do {
172 res = s->chr_sync_read(s, buf + offset, len - offset);
173 if (res == -1 && errno == EAGAIN) {
174 g_usleep(100);
175 }
176 } while (res == -1 && errno == EAGAIN);
177
178 if (res == 0) {
179 break;
180 }
181
182 if (res < 0) {
183 return res;
184 }
185
186 offset += res;
187
188 if (!counter--) {
189 break;
190 }
191 }
192
193 return offset;
194 }
195
196 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
197 {
198 if (!s->chr_ioctl)
199 return -ENOTSUP;
200 return s->chr_ioctl(s, cmd, arg);
201 }
202
203 int qemu_chr_be_can_write(CharDriverState *s)
204 {
205 if (!s->chr_can_read)
206 return 0;
207 return s->chr_can_read(s->handler_opaque);
208 }
209
210 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
211 {
212 if (s->chr_read) {
213 s->chr_read(s->handler_opaque, buf, len);
214 }
215 }
216
217 int qemu_chr_fe_get_msgfd(CharDriverState *s)
218 {
219 int fd;
220 return (qemu_chr_fe_get_msgfds(s, &fd, 1) == 1) ? fd : -1;
221 }
222
223 int qemu_chr_fe_get_msgfds(CharDriverState *s, int *fds, int len)
224 {
225 return s->get_msgfds ? s->get_msgfds(s, fds, len) : -1;
226 }
227
228 int qemu_chr_fe_set_msgfds(CharDriverState *s, int *fds, int num)
229 {
230 return s->set_msgfds ? s->set_msgfds(s, fds, num) : -1;
231 }
232
233 int qemu_chr_add_client(CharDriverState *s, int fd)
234 {
235 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
236 }
237
238 void qemu_chr_accept_input(CharDriverState *s)
239 {
240 if (s->chr_accept_input)
241 s->chr_accept_input(s);
242 qemu_notify_event();
243 }
244
245 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
246 {
247 char buf[READ_BUF_LEN];
248 va_list ap;
249 va_start(ap, fmt);
250 vsnprintf(buf, sizeof(buf), fmt, ap);
251 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
252 va_end(ap);
253 }
254
255 static void remove_fd_in_watch(CharDriverState *chr);
256
257 void qemu_chr_add_handlers(CharDriverState *s,
258 IOCanReadHandler *fd_can_read,
259 IOReadHandler *fd_read,
260 IOEventHandler *fd_event,
261 void *opaque)
262 {
263 int fe_open;
264
265 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
266 fe_open = 0;
267 remove_fd_in_watch(s);
268 } else {
269 fe_open = 1;
270 }
271 s->chr_can_read = fd_can_read;
272 s->chr_read = fd_read;
273 s->chr_event = fd_event;
274 s->handler_opaque = opaque;
275 if (fe_open && s->chr_update_read_handler)
276 s->chr_update_read_handler(s);
277
278 if (!s->explicit_fe_open) {
279 qemu_chr_fe_set_open(s, fe_open);
280 }
281
282 /* We're connecting to an already opened device, so let's make sure we
283 also get the open event */
284 if (fe_open && s->be_open) {
285 qemu_chr_be_generic_open(s);
286 }
287 }
288
289 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
290 {
291 return len;
292 }
293
294 static CharDriverState *qemu_chr_open_null(void)
295 {
296 CharDriverState *chr;
297
298 chr = qemu_chr_alloc();
299 chr->chr_write = null_chr_write;
300 chr->explicit_be_open = true;
301 return chr;
302 }
303
304 /* MUX driver for serial I/O splitting */
305 #define MAX_MUX 4
306 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
307 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
308 typedef struct {
309 IOCanReadHandler *chr_can_read[MAX_MUX];
310 IOReadHandler *chr_read[MAX_MUX];
311 IOEventHandler *chr_event[MAX_MUX];
312 void *ext_opaque[MAX_MUX];
313 CharDriverState *drv;
314 int focus;
315 int mux_cnt;
316 int term_got_escape;
317 int max_size;
318 /* Intermediate input buffer allows to catch escape sequences even if the
319 currently active device is not accepting any input - but only until it
320 is full as well. */
321 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
322 int prod[MAX_MUX];
323 int cons[MAX_MUX];
324 int timestamps;
325
326 /* Protected by the CharDriverState chr_write_lock. */
327 int linestart;
328 int64_t timestamps_start;
329 } MuxDriver;
330
331
332 /* Called with chr_write_lock held. */
333 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
334 {
335 MuxDriver *d = chr->opaque;
336 int ret;
337 if (!d->timestamps) {
338 ret = qemu_chr_fe_write(d->drv, buf, len);
339 } else {
340 int i;
341
342 ret = 0;
343 for (i = 0; i < len; i++) {
344 if (d->linestart) {
345 char buf1[64];
346 int64_t ti;
347 int secs;
348
349 ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
350 if (d->timestamps_start == -1)
351 d->timestamps_start = ti;
352 ti -= d->timestamps_start;
353 secs = ti / 1000;
354 snprintf(buf1, sizeof(buf1),
355 "[%02d:%02d:%02d.%03d] ",
356 secs / 3600,
357 (secs / 60) % 60,
358 secs % 60,
359 (int)(ti % 1000));
360 qemu_chr_fe_write(d->drv, (uint8_t *)buf1, strlen(buf1));
361 d->linestart = 0;
362 }
363 ret += qemu_chr_fe_write(d->drv, buf+i, 1);
364 if (buf[i] == '\n') {
365 d->linestart = 1;
366 }
367 }
368 }
369 return ret;
370 }
371
372 static const char * const mux_help[] = {
373 "% h print this help\n\r",
374 "% x exit emulator\n\r",
375 "% s save disk data back to file (if -snapshot)\n\r",
376 "% t toggle console timestamps\n\r"
377 "% b send break (magic sysrq)\n\r",
378 "% c switch between console and monitor\n\r",
379 "% % sends %\n\r",
380 NULL
381 };
382
383 int term_escape_char = 0x01; /* ctrl-a is used for escape */
384 static void mux_print_help(CharDriverState *chr)
385 {
386 int i, j;
387 char ebuf[15] = "Escape-Char";
388 char cbuf[50] = "\n\r";
389
390 if (term_escape_char > 0 && term_escape_char < 26) {
391 snprintf(cbuf, sizeof(cbuf), "\n\r");
392 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
393 } else {
394 snprintf(cbuf, sizeof(cbuf),
395 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
396 term_escape_char);
397 }
398 qemu_chr_fe_write(chr, (uint8_t *)cbuf, strlen(cbuf));
399 for (i = 0; mux_help[i] != NULL; i++) {
400 for (j=0; mux_help[i][j] != '\0'; j++) {
401 if (mux_help[i][j] == '%')
402 qemu_chr_fe_write(chr, (uint8_t *)ebuf, strlen(ebuf));
403 else
404 qemu_chr_fe_write(chr, (uint8_t *)&mux_help[i][j], 1);
405 }
406 }
407 }
408
409 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
410 {
411 if (d->chr_event[mux_nr])
412 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
413 }
414
415 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
416 {
417 if (d->term_got_escape) {
418 d->term_got_escape = 0;
419 if (ch == term_escape_char)
420 goto send_char;
421 switch(ch) {
422 case '?':
423 case 'h':
424 mux_print_help(chr);
425 break;
426 case 'x':
427 {
428 const char *term = "QEMU: Terminated\n\r";
429 qemu_chr_fe_write(chr, (uint8_t *)term, strlen(term));
430 exit(0);
431 break;
432 }
433 case 's':
434 bdrv_commit_all();
435 break;
436 case 'b':
437 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
438 break;
439 case 'c':
440 /* Switch to the next registered device */
441 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
442 d->focus++;
443 if (d->focus >= d->mux_cnt)
444 d->focus = 0;
445 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
446 break;
447 case 't':
448 d->timestamps = !d->timestamps;
449 d->timestamps_start = -1;
450 d->linestart = 0;
451 break;
452 }
453 } else if (ch == term_escape_char) {
454 d->term_got_escape = 1;
455 } else {
456 send_char:
457 return 1;
458 }
459 return 0;
460 }
461
462 static void mux_chr_accept_input(CharDriverState *chr)
463 {
464 MuxDriver *d = chr->opaque;
465 int m = d->focus;
466
467 while (d->prod[m] != d->cons[m] &&
468 d->chr_can_read[m] &&
469 d->chr_can_read[m](d->ext_opaque[m])) {
470 d->chr_read[m](d->ext_opaque[m],
471 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
472 }
473 }
474
475 static int mux_chr_can_read(void *opaque)
476 {
477 CharDriverState *chr = opaque;
478 MuxDriver *d = chr->opaque;
479 int m = d->focus;
480
481 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
482 return 1;
483 if (d->chr_can_read[m])
484 return d->chr_can_read[m](d->ext_opaque[m]);
485 return 0;
486 }
487
488 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
489 {
490 CharDriverState *chr = opaque;
491 MuxDriver *d = chr->opaque;
492 int m = d->focus;
493 int i;
494
495 mux_chr_accept_input (opaque);
496
497 for(i = 0; i < size; i++)
498 if (mux_proc_byte(chr, d, buf[i])) {
499 if (d->prod[m] == d->cons[m] &&
500 d->chr_can_read[m] &&
501 d->chr_can_read[m](d->ext_opaque[m]))
502 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
503 else
504 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
505 }
506 }
507
508 static void mux_chr_event(void *opaque, int event)
509 {
510 CharDriverState *chr = opaque;
511 MuxDriver *d = chr->opaque;
512 int i;
513
514 /* Send the event to all registered listeners */
515 for (i = 0; i < d->mux_cnt; i++)
516 mux_chr_send_event(d, i, event);
517 }
518
519 static void mux_chr_update_read_handler(CharDriverState *chr)
520 {
521 MuxDriver *d = chr->opaque;
522
523 if (d->mux_cnt >= MAX_MUX) {
524 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
525 return;
526 }
527 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
528 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
529 d->chr_read[d->mux_cnt] = chr->chr_read;
530 d->chr_event[d->mux_cnt] = chr->chr_event;
531 /* Fix up the real driver with mux routines */
532 if (d->mux_cnt == 0) {
533 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
534 mux_chr_event, chr);
535 }
536 if (d->focus != -1) {
537 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
538 }
539 d->focus = d->mux_cnt;
540 d->mux_cnt++;
541 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
542 }
543
544 static bool muxes_realized;
545
546 /**
547 * Called after processing of default and command-line-specified
548 * chardevs to deliver CHR_EVENT_OPENED events to any FEs attached
549 * to a mux chardev. This is done here to ensure that
550 * output/prompts/banners are only displayed for the FE that has
551 * focus when initial command-line processing/machine init is
552 * completed.
553 *
554 * After this point, any new FE attached to any new or existing
555 * mux will receive CHR_EVENT_OPENED notifications for the BE
556 * immediately.
557 */
558 static void muxes_realize_done(Notifier *notifier, void *unused)
559 {
560 CharDriverState *chr;
561
562 QTAILQ_FOREACH(chr, &chardevs, next) {
563 if (chr->is_mux) {
564 MuxDriver *d = chr->opaque;
565 int i;
566
567 /* send OPENED to all already-attached FEs */
568 for (i = 0; i < d->mux_cnt; i++) {
569 mux_chr_send_event(d, i, CHR_EVENT_OPENED);
570 }
571 /* mark mux as OPENED so any new FEs will immediately receive
572 * OPENED event
573 */
574 qemu_chr_be_generic_open(chr);
575 }
576 }
577 muxes_realized = true;
578 }
579
580 static Notifier muxes_realize_notify = {
581 .notify = muxes_realize_done,
582 };
583
584 static GSource *mux_chr_add_watch(CharDriverState *s, GIOCondition cond)
585 {
586 MuxDriver *d = s->opaque;
587 return d->drv->chr_add_watch(d->drv, cond);
588 }
589
590 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
591 {
592 CharDriverState *chr;
593 MuxDriver *d;
594
595 chr = qemu_chr_alloc();
596 d = g_malloc0(sizeof(MuxDriver));
597
598 chr->opaque = d;
599 d->drv = drv;
600 d->focus = -1;
601 chr->chr_write = mux_chr_write;
602 chr->chr_update_read_handler = mux_chr_update_read_handler;
603 chr->chr_accept_input = mux_chr_accept_input;
604 /* Frontend guest-open / -close notification is not support with muxes */
605 chr->chr_set_fe_open = NULL;
606 if (drv->chr_add_watch) {
607 chr->chr_add_watch = mux_chr_add_watch;
608 }
609 /* only default to opened state if we've realized the initial
610 * set of muxes
611 */
612 chr->explicit_be_open = muxes_realized ? 0 : 1;
613 chr->is_mux = 1;
614
615 return chr;
616 }
617
618
619 #ifdef _WIN32
620 int send_all(int fd, const void *buf, int len1)
621 {
622 int ret, len;
623
624 len = len1;
625 while (len > 0) {
626 ret = send(fd, buf, len, 0);
627 if (ret < 0) {
628 errno = WSAGetLastError();
629 if (errno != WSAEWOULDBLOCK) {
630 return -1;
631 }
632 } else if (ret == 0) {
633 break;
634 } else {
635 buf += ret;
636 len -= ret;
637 }
638 }
639 return len1 - len;
640 }
641
642 #else
643
644 int send_all(int fd, const void *_buf, int len1)
645 {
646 int ret, len;
647 const uint8_t *buf = _buf;
648
649 len = len1;
650 while (len > 0) {
651 ret = write(fd, buf, len);
652 if (ret < 0) {
653 if (errno != EINTR && errno != EAGAIN)
654 return -1;
655 } else if (ret == 0) {
656 break;
657 } else {
658 buf += ret;
659 len -= ret;
660 }
661 }
662 return len1 - len;
663 }
664
665 int recv_all(int fd, void *_buf, int len1, bool single_read)
666 {
667 int ret, len;
668 uint8_t *buf = _buf;
669
670 len = len1;
671 while ((len > 0) && (ret = read(fd, buf, len)) != 0) {
672 if (ret < 0) {
673 if (errno != EINTR && errno != EAGAIN) {
674 return -1;
675 }
676 continue;
677 } else {
678 if (single_read) {
679 return ret;
680 }
681 buf += ret;
682 len -= ret;
683 }
684 }
685 return len1 - len;
686 }
687
688 #endif /* !_WIN32 */
689
690 typedef struct IOWatchPoll
691 {
692 GSource parent;
693
694 GIOChannel *channel;
695 GSource *src;
696
697 IOCanReadHandler *fd_can_read;
698 GSourceFunc fd_read;
699 void *opaque;
700 } IOWatchPoll;
701
702 static IOWatchPoll *io_watch_poll_from_source(GSource *source)
703 {
704 return container_of(source, IOWatchPoll, parent);
705 }
706
707 static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_)
708 {
709 IOWatchPoll *iwp = io_watch_poll_from_source(source);
710 bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
711 bool was_active = iwp->src != NULL;
712 if (was_active == now_active) {
713 return FALSE;
714 }
715
716 if (now_active) {
717 iwp->src = g_io_create_watch(iwp->channel, G_IO_IN | G_IO_ERR | G_IO_HUP);
718 g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
719 g_source_attach(iwp->src, NULL);
720 } else {
721 g_source_destroy(iwp->src);
722 g_source_unref(iwp->src);
723 iwp->src = NULL;
724 }
725 return FALSE;
726 }
727
728 static gboolean io_watch_poll_check(GSource *source)
729 {
730 return FALSE;
731 }
732
733 static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
734 gpointer user_data)
735 {
736 abort();
737 }
738
739 static void io_watch_poll_finalize(GSource *source)
740 {
741 /* Due to a glib bug, removing the last reference to a source
742 * inside a finalize callback causes recursive locking (and a
743 * deadlock). This is not a problem inside other callbacks,
744 * including dispatch callbacks, so we call io_remove_watch_poll
745 * to remove this source. At this point, iwp->src must
746 * be NULL, or we would leak it.
747 *
748 * This would be solved much more elegantly by child sources,
749 * but we support older glib versions that do not have them.
750 */
751 IOWatchPoll *iwp = io_watch_poll_from_source(source);
752 assert(iwp->src == NULL);
753 }
754
755 static GSourceFuncs io_watch_poll_funcs = {
756 .prepare = io_watch_poll_prepare,
757 .check = io_watch_poll_check,
758 .dispatch = io_watch_poll_dispatch,
759 .finalize = io_watch_poll_finalize,
760 };
761
762 /* Can only be used for read */
763 static guint io_add_watch_poll(GIOChannel *channel,
764 IOCanReadHandler *fd_can_read,
765 GIOFunc fd_read,
766 gpointer user_data)
767 {
768 IOWatchPoll *iwp;
769 int tag;
770
771 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll));
772 iwp->fd_can_read = fd_can_read;
773 iwp->opaque = user_data;
774 iwp->channel = channel;
775 iwp->fd_read = (GSourceFunc) fd_read;
776 iwp->src = NULL;
777
778 tag = g_source_attach(&iwp->parent, NULL);
779 g_source_unref(&iwp->parent);
780 return tag;
781 }
782
783 static void io_remove_watch_poll(guint tag)
784 {
785 GSource *source;
786 IOWatchPoll *iwp;
787
788 g_return_if_fail (tag > 0);
789
790 source = g_main_context_find_source_by_id(NULL, tag);
791 g_return_if_fail (source != NULL);
792
793 iwp = io_watch_poll_from_source(source);
794 if (iwp->src) {
795 g_source_destroy(iwp->src);
796 g_source_unref(iwp->src);
797 iwp->src = NULL;
798 }
799 g_source_destroy(&iwp->parent);
800 }
801
802 static void remove_fd_in_watch(CharDriverState *chr)
803 {
804 if (chr->fd_in_tag) {
805 io_remove_watch_poll(chr->fd_in_tag);
806 chr->fd_in_tag = 0;
807 }
808 }
809
810 #ifndef _WIN32
811 static GIOChannel *io_channel_from_fd(int fd)
812 {
813 GIOChannel *chan;
814
815 if (fd == -1) {
816 return NULL;
817 }
818
819 chan = g_io_channel_unix_new(fd);
820
821 g_io_channel_set_encoding(chan, NULL, NULL);
822 g_io_channel_set_buffered(chan, FALSE);
823
824 return chan;
825 }
826 #endif
827
828 static GIOChannel *io_channel_from_socket(int fd)
829 {
830 GIOChannel *chan;
831
832 if (fd == -1) {
833 return NULL;
834 }
835
836 #ifdef _WIN32
837 chan = g_io_channel_win32_new_socket(fd);
838 #else
839 chan = g_io_channel_unix_new(fd);
840 #endif
841
842 g_io_channel_set_encoding(chan, NULL, NULL);
843 g_io_channel_set_buffered(chan, FALSE);
844
845 return chan;
846 }
847
848 static int io_channel_send(GIOChannel *fd, const void *buf, size_t len)
849 {
850 size_t offset = 0;
851 GIOStatus status = G_IO_STATUS_NORMAL;
852
853 while (offset < len && status == G_IO_STATUS_NORMAL) {
854 gsize bytes_written = 0;
855
856 status = g_io_channel_write_chars(fd, buf + offset, len - offset,
857 &bytes_written, NULL);
858 offset += bytes_written;
859 }
860
861 if (offset > 0) {
862 return offset;
863 }
864 switch (status) {
865 case G_IO_STATUS_NORMAL:
866 g_assert(len == 0);
867 return 0;
868 case G_IO_STATUS_AGAIN:
869 errno = EAGAIN;
870 return -1;
871 default:
872 break;
873 }
874 errno = EINVAL;
875 return -1;
876 }
877
878 #ifndef _WIN32
879
880 typedef struct FDCharDriver {
881 CharDriverState *chr;
882 GIOChannel *fd_in, *fd_out;
883 int max_size;
884 QTAILQ_ENTRY(FDCharDriver) node;
885 } FDCharDriver;
886
887 /* Called with chr_write_lock held. */
888 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
889 {
890 FDCharDriver *s = chr->opaque;
891
892 return io_channel_send(s->fd_out, buf, len);
893 }
894
895 static gboolean fd_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
896 {
897 CharDriverState *chr = opaque;
898 FDCharDriver *s = chr->opaque;
899 int len;
900 uint8_t buf[READ_BUF_LEN];
901 GIOStatus status;
902 gsize bytes_read;
903
904 len = sizeof(buf);
905 if (len > s->max_size) {
906 len = s->max_size;
907 }
908 if (len == 0) {
909 return TRUE;
910 }
911
912 status = g_io_channel_read_chars(chan, (gchar *)buf,
913 len, &bytes_read, NULL);
914 if (status == G_IO_STATUS_EOF) {
915 remove_fd_in_watch(chr);
916 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
917 return FALSE;
918 }
919 if (status == G_IO_STATUS_NORMAL) {
920 qemu_chr_be_write(chr, buf, bytes_read);
921 }
922
923 return TRUE;
924 }
925
926 static int fd_chr_read_poll(void *opaque)
927 {
928 CharDriverState *chr = opaque;
929 FDCharDriver *s = chr->opaque;
930
931 s->max_size = qemu_chr_be_can_write(chr);
932 return s->max_size;
933 }
934
935 static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
936 {
937 FDCharDriver *s = chr->opaque;
938 return g_io_create_watch(s->fd_out, cond);
939 }
940
941 static void fd_chr_update_read_handler(CharDriverState *chr)
942 {
943 FDCharDriver *s = chr->opaque;
944
945 remove_fd_in_watch(chr);
946 if (s->fd_in) {
947 chr->fd_in_tag = io_add_watch_poll(s->fd_in, fd_chr_read_poll,
948 fd_chr_read, chr);
949 }
950 }
951
952 static void fd_chr_close(struct CharDriverState *chr)
953 {
954 FDCharDriver *s = chr->opaque;
955
956 remove_fd_in_watch(chr);
957 if (s->fd_in) {
958 g_io_channel_unref(s->fd_in);
959 }
960 if (s->fd_out) {
961 g_io_channel_unref(s->fd_out);
962 }
963
964 g_free(s);
965 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
966 }
967
968 /* open a character device to a unix fd */
969 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
970 {
971 CharDriverState *chr;
972 FDCharDriver *s;
973
974 chr = qemu_chr_alloc();
975 s = g_malloc0(sizeof(FDCharDriver));
976 s->fd_in = io_channel_from_fd(fd_in);
977 s->fd_out = io_channel_from_fd(fd_out);
978 qemu_set_nonblock(fd_out);
979 s->chr = chr;
980 chr->opaque = s;
981 chr->chr_add_watch = fd_chr_add_watch;
982 chr->chr_write = fd_chr_write;
983 chr->chr_update_read_handler = fd_chr_update_read_handler;
984 chr->chr_close = fd_chr_close;
985
986 return chr;
987 }
988
989 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
990 {
991 int fd_in, fd_out;
992 char filename_in[256], filename_out[256];
993 const char *filename = opts->device;
994
995 if (filename == NULL) {
996 fprintf(stderr, "chardev: pipe: no filename given\n");
997 return NULL;
998 }
999
1000 snprintf(filename_in, 256, "%s.in", filename);
1001 snprintf(filename_out, 256, "%s.out", filename);
1002 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
1003 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
1004 if (fd_in < 0 || fd_out < 0) {
1005 if (fd_in >= 0)
1006 close(fd_in);
1007 if (fd_out >= 0)
1008 close(fd_out);
1009 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
1010 if (fd_in < 0) {
1011 return NULL;
1012 }
1013 }
1014 return qemu_chr_open_fd(fd_in, fd_out);
1015 }
1016
1017 /* init terminal so that we can grab keys */
1018 static struct termios oldtty;
1019 static int old_fd0_flags;
1020 static bool stdio_allow_signal;
1021
1022 static void term_exit(void)
1023 {
1024 tcsetattr (0, TCSANOW, &oldtty);
1025 fcntl(0, F_SETFL, old_fd0_flags);
1026 }
1027
1028 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
1029 {
1030 struct termios tty;
1031
1032 tty = oldtty;
1033 if (!echo) {
1034 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1035 |INLCR|IGNCR|ICRNL|IXON);
1036 tty.c_oflag |= OPOST;
1037 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1038 tty.c_cflag &= ~(CSIZE|PARENB);
1039 tty.c_cflag |= CS8;
1040 tty.c_cc[VMIN] = 1;
1041 tty.c_cc[VTIME] = 0;
1042 }
1043 if (!stdio_allow_signal)
1044 tty.c_lflag &= ~ISIG;
1045
1046 tcsetattr (0, TCSANOW, &tty);
1047 }
1048
1049 static void qemu_chr_close_stdio(struct CharDriverState *chr)
1050 {
1051 term_exit();
1052 fd_chr_close(chr);
1053 }
1054
1055 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
1056 {
1057 CharDriverState *chr;
1058
1059 if (is_daemonized()) {
1060 error_report("cannot use stdio with -daemonize");
1061 return NULL;
1062 }
1063 old_fd0_flags = fcntl(0, F_GETFL);
1064 tcgetattr (0, &oldtty);
1065 qemu_set_nonblock(0);
1066 atexit(term_exit);
1067
1068 chr = qemu_chr_open_fd(0, 1);
1069 chr->chr_close = qemu_chr_close_stdio;
1070 chr->chr_set_echo = qemu_chr_set_echo_stdio;
1071 if (opts->has_signal) {
1072 stdio_allow_signal = opts->signal;
1073 }
1074 qemu_chr_fe_set_echo(chr, false);
1075
1076 return chr;
1077 }
1078
1079 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1080 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
1081 || defined(__GLIBC__)
1082
1083 #define HAVE_CHARDEV_TTY 1
1084
1085 typedef struct {
1086 GIOChannel *fd;
1087 int read_bytes;
1088
1089 /* Protected by the CharDriverState chr_write_lock. */
1090 int connected;
1091 guint timer_tag;
1092 guint open_tag;
1093 } PtyCharDriver;
1094
1095 static void pty_chr_update_read_handler_locked(CharDriverState *chr);
1096 static void pty_chr_state(CharDriverState *chr, int connected);
1097
1098 static gboolean pty_chr_timer(gpointer opaque)
1099 {
1100 struct CharDriverState *chr = opaque;
1101 PtyCharDriver *s = chr->opaque;
1102
1103 qemu_mutex_lock(&chr->chr_write_lock);
1104 s->timer_tag = 0;
1105 s->open_tag = 0;
1106 if (!s->connected) {
1107 /* Next poll ... */
1108 pty_chr_update_read_handler_locked(chr);
1109 }
1110 qemu_mutex_unlock(&chr->chr_write_lock);
1111 return FALSE;
1112 }
1113
1114 /* Called with chr_write_lock held. */
1115 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1116 {
1117 PtyCharDriver *s = chr->opaque;
1118
1119 if (s->timer_tag) {
1120 g_source_remove(s->timer_tag);
1121 s->timer_tag = 0;
1122 }
1123
1124 if (ms == 1000) {
1125 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1126 } else {
1127 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1128 }
1129 }
1130
1131 /* Called with chr_write_lock held. */
1132 static void pty_chr_update_read_handler_locked(CharDriverState *chr)
1133 {
1134 PtyCharDriver *s = chr->opaque;
1135 GPollFD pfd;
1136
1137 pfd.fd = g_io_channel_unix_get_fd(s->fd);
1138 pfd.events = G_IO_OUT;
1139 pfd.revents = 0;
1140 g_poll(&pfd, 1, 0);
1141 if (pfd.revents & G_IO_HUP) {
1142 pty_chr_state(chr, 0);
1143 } else {
1144 pty_chr_state(chr, 1);
1145 }
1146 }
1147
1148 static void pty_chr_update_read_handler(CharDriverState *chr)
1149 {
1150 qemu_mutex_lock(&chr->chr_write_lock);
1151 pty_chr_update_read_handler_locked(chr);
1152 qemu_mutex_unlock(&chr->chr_write_lock);
1153 }
1154
1155 /* Called with chr_write_lock held. */
1156 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1157 {
1158 PtyCharDriver *s = chr->opaque;
1159
1160 if (!s->connected) {
1161 /* guest sends data, check for (re-)connect */
1162 pty_chr_update_read_handler_locked(chr);
1163 if (!s->connected) {
1164 return 0;
1165 }
1166 }
1167 return io_channel_send(s->fd, buf, len);
1168 }
1169
1170 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1171 {
1172 PtyCharDriver *s = chr->opaque;
1173 if (!s->connected) {
1174 return NULL;
1175 }
1176 return g_io_create_watch(s->fd, cond);
1177 }
1178
1179 static int pty_chr_read_poll(void *opaque)
1180 {
1181 CharDriverState *chr = opaque;
1182 PtyCharDriver *s = chr->opaque;
1183
1184 s->read_bytes = qemu_chr_be_can_write(chr);
1185 return s->read_bytes;
1186 }
1187
1188 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1189 {
1190 CharDriverState *chr = opaque;
1191 PtyCharDriver *s = chr->opaque;
1192 gsize size, len;
1193 uint8_t buf[READ_BUF_LEN];
1194 GIOStatus status;
1195
1196 len = sizeof(buf);
1197 if (len > s->read_bytes)
1198 len = s->read_bytes;
1199 if (len == 0) {
1200 return TRUE;
1201 }
1202 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1203 if (status != G_IO_STATUS_NORMAL) {
1204 pty_chr_state(chr, 0);
1205 return FALSE;
1206 } else {
1207 pty_chr_state(chr, 1);
1208 qemu_chr_be_write(chr, buf, size);
1209 }
1210 return TRUE;
1211 }
1212
1213 static gboolean qemu_chr_be_generic_open_func(gpointer opaque)
1214 {
1215 CharDriverState *chr = opaque;
1216 PtyCharDriver *s = chr->opaque;
1217
1218 s->open_tag = 0;
1219 qemu_chr_be_generic_open(chr);
1220 return FALSE;
1221 }
1222
1223 /* Called with chr_write_lock held. */
1224 static void pty_chr_state(CharDriverState *chr, int connected)
1225 {
1226 PtyCharDriver *s = chr->opaque;
1227
1228 if (!connected) {
1229 if (s->open_tag) {
1230 g_source_remove(s->open_tag);
1231 s->open_tag = 0;
1232 }
1233 remove_fd_in_watch(chr);
1234 s->connected = 0;
1235 /* (re-)connect poll interval for idle guests: once per second.
1236 * We check more frequently in case the guests sends data to
1237 * the virtual device linked to our pty. */
1238 pty_chr_rearm_timer(chr, 1000);
1239 } else {
1240 if (s->timer_tag) {
1241 g_source_remove(s->timer_tag);
1242 s->timer_tag = 0;
1243 }
1244 if (!s->connected) {
1245 g_assert(s->open_tag == 0);
1246 s->connected = 1;
1247 s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, chr);
1248 }
1249 if (!chr->fd_in_tag) {
1250 chr->fd_in_tag = io_add_watch_poll(s->fd, pty_chr_read_poll,
1251 pty_chr_read, chr);
1252 }
1253 }
1254 }
1255
1256 static void pty_chr_close(struct CharDriverState *chr)
1257 {
1258 PtyCharDriver *s = chr->opaque;
1259 int fd;
1260
1261 qemu_mutex_lock(&chr->chr_write_lock);
1262 pty_chr_state(chr, 0);
1263 fd = g_io_channel_unix_get_fd(s->fd);
1264 g_io_channel_unref(s->fd);
1265 close(fd);
1266 if (s->timer_tag) {
1267 g_source_remove(s->timer_tag);
1268 s->timer_tag = 0;
1269 }
1270 qemu_mutex_unlock(&chr->chr_write_lock);
1271 g_free(s);
1272 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1273 }
1274
1275 static CharDriverState *qemu_chr_open_pty(const char *id,
1276 ChardevReturn *ret)
1277 {
1278 CharDriverState *chr;
1279 PtyCharDriver *s;
1280 int master_fd, slave_fd;
1281 char pty_name[PATH_MAX];
1282
1283 master_fd = qemu_openpty_raw(&slave_fd, pty_name);
1284 if (master_fd < 0) {
1285 return NULL;
1286 }
1287
1288 close(slave_fd);
1289
1290 chr = qemu_chr_alloc();
1291
1292 chr->filename = g_strdup_printf("pty:%s", pty_name);
1293 ret->pty = g_strdup(pty_name);
1294 ret->has_pty = true;
1295
1296 fprintf(stderr, "char device redirected to %s (label %s)\n",
1297 pty_name, id);
1298
1299 s = g_malloc0(sizeof(PtyCharDriver));
1300 chr->opaque = s;
1301 chr->chr_write = pty_chr_write;
1302 chr->chr_update_read_handler = pty_chr_update_read_handler;
1303 chr->chr_close = pty_chr_close;
1304 chr->chr_add_watch = pty_chr_add_watch;
1305 chr->explicit_be_open = true;
1306
1307 s->fd = io_channel_from_fd(master_fd);
1308 s->timer_tag = 0;
1309
1310 return chr;
1311 }
1312
1313 static void tty_serial_init(int fd, int speed,
1314 int parity, int data_bits, int stop_bits)
1315 {
1316 struct termios tty;
1317 speed_t spd;
1318
1319 #if 0
1320 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1321 speed, parity, data_bits, stop_bits);
1322 #endif
1323 tcgetattr (fd, &tty);
1324
1325 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1326 speed = speed * 10 / 11;
1327 do {
1328 check_speed(50);
1329 check_speed(75);
1330 check_speed(110);
1331 check_speed(134);
1332 check_speed(150);
1333 check_speed(200);
1334 check_speed(300);
1335 check_speed(600);
1336 check_speed(1200);
1337 check_speed(1800);
1338 check_speed(2400);
1339 check_speed(4800);
1340 check_speed(9600);
1341 check_speed(19200);
1342 check_speed(38400);
1343 /* Non-Posix values follow. They may be unsupported on some systems. */
1344 check_speed(57600);
1345 check_speed(115200);
1346 #ifdef B230400
1347 check_speed(230400);
1348 #endif
1349 #ifdef B460800
1350 check_speed(460800);
1351 #endif
1352 #ifdef B500000
1353 check_speed(500000);
1354 #endif
1355 #ifdef B576000
1356 check_speed(576000);
1357 #endif
1358 #ifdef B921600
1359 check_speed(921600);
1360 #endif
1361 #ifdef B1000000
1362 check_speed(1000000);
1363 #endif
1364 #ifdef B1152000
1365 check_speed(1152000);
1366 #endif
1367 #ifdef B1500000
1368 check_speed(1500000);
1369 #endif
1370 #ifdef B2000000
1371 check_speed(2000000);
1372 #endif
1373 #ifdef B2500000
1374 check_speed(2500000);
1375 #endif
1376 #ifdef B3000000
1377 check_speed(3000000);
1378 #endif
1379 #ifdef B3500000
1380 check_speed(3500000);
1381 #endif
1382 #ifdef B4000000
1383 check_speed(4000000);
1384 #endif
1385 spd = B115200;
1386 } while (0);
1387
1388 cfsetispeed(&tty, spd);
1389 cfsetospeed(&tty, spd);
1390
1391 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1392 |INLCR|IGNCR|ICRNL|IXON);
1393 tty.c_oflag |= OPOST;
1394 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1395 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1396 switch(data_bits) {
1397 default:
1398 case 8:
1399 tty.c_cflag |= CS8;
1400 break;
1401 case 7:
1402 tty.c_cflag |= CS7;
1403 break;
1404 case 6:
1405 tty.c_cflag |= CS6;
1406 break;
1407 case 5:
1408 tty.c_cflag |= CS5;
1409 break;
1410 }
1411 switch(parity) {
1412 default:
1413 case 'N':
1414 break;
1415 case 'E':
1416 tty.c_cflag |= PARENB;
1417 break;
1418 case 'O':
1419 tty.c_cflag |= PARENB | PARODD;
1420 break;
1421 }
1422 if (stop_bits == 2)
1423 tty.c_cflag |= CSTOPB;
1424
1425 tcsetattr (fd, TCSANOW, &tty);
1426 }
1427
1428 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1429 {
1430 FDCharDriver *s = chr->opaque;
1431
1432 switch(cmd) {
1433 case CHR_IOCTL_SERIAL_SET_PARAMS:
1434 {
1435 QEMUSerialSetParams *ssp = arg;
1436 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1437 ssp->speed, ssp->parity,
1438 ssp->data_bits, ssp->stop_bits);
1439 }
1440 break;
1441 case CHR_IOCTL_SERIAL_SET_BREAK:
1442 {
1443 int enable = *(int *)arg;
1444 if (enable) {
1445 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1446 }
1447 }
1448 break;
1449 case CHR_IOCTL_SERIAL_GET_TIOCM:
1450 {
1451 int sarg = 0;
1452 int *targ = (int *)arg;
1453 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1454 *targ = 0;
1455 if (sarg & TIOCM_CTS)
1456 *targ |= CHR_TIOCM_CTS;
1457 if (sarg & TIOCM_CAR)
1458 *targ |= CHR_TIOCM_CAR;
1459 if (sarg & TIOCM_DSR)
1460 *targ |= CHR_TIOCM_DSR;
1461 if (sarg & TIOCM_RI)
1462 *targ |= CHR_TIOCM_RI;
1463 if (sarg & TIOCM_DTR)
1464 *targ |= CHR_TIOCM_DTR;
1465 if (sarg & TIOCM_RTS)
1466 *targ |= CHR_TIOCM_RTS;
1467 }
1468 break;
1469 case CHR_IOCTL_SERIAL_SET_TIOCM:
1470 {
1471 int sarg = *(int *)arg;
1472 int targ = 0;
1473 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1474 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1475 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1476 if (sarg & CHR_TIOCM_CTS)
1477 targ |= TIOCM_CTS;
1478 if (sarg & CHR_TIOCM_CAR)
1479 targ |= TIOCM_CAR;
1480 if (sarg & CHR_TIOCM_DSR)
1481 targ |= TIOCM_DSR;
1482 if (sarg & CHR_TIOCM_RI)
1483 targ |= TIOCM_RI;
1484 if (sarg & CHR_TIOCM_DTR)
1485 targ |= TIOCM_DTR;
1486 if (sarg & CHR_TIOCM_RTS)
1487 targ |= TIOCM_RTS;
1488 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1489 }
1490 break;
1491 default:
1492 return -ENOTSUP;
1493 }
1494 return 0;
1495 }
1496
1497 static void qemu_chr_close_tty(CharDriverState *chr)
1498 {
1499 FDCharDriver *s = chr->opaque;
1500 int fd = -1;
1501
1502 if (s) {
1503 fd = g_io_channel_unix_get_fd(s->fd_in);
1504 }
1505
1506 fd_chr_close(chr);
1507
1508 if (fd >= 0) {
1509 close(fd);
1510 }
1511 }
1512
1513 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1514 {
1515 CharDriverState *chr;
1516
1517 tty_serial_init(fd, 115200, 'N', 8, 1);
1518 chr = qemu_chr_open_fd(fd, fd);
1519 chr->chr_ioctl = tty_serial_ioctl;
1520 chr->chr_close = qemu_chr_close_tty;
1521 return chr;
1522 }
1523 #endif /* __linux__ || __sun__ */
1524
1525 #if defined(__linux__)
1526
1527 #define HAVE_CHARDEV_PARPORT 1
1528
1529 typedef struct {
1530 int fd;
1531 int mode;
1532 } ParallelCharDriver;
1533
1534 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1535 {
1536 if (s->mode != mode) {
1537 int m = mode;
1538 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1539 return 0;
1540 s->mode = mode;
1541 }
1542 return 1;
1543 }
1544
1545 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1546 {
1547 ParallelCharDriver *drv = chr->opaque;
1548 int fd = drv->fd;
1549 uint8_t b;
1550
1551 switch(cmd) {
1552 case CHR_IOCTL_PP_READ_DATA:
1553 if (ioctl(fd, PPRDATA, &b) < 0)
1554 return -ENOTSUP;
1555 *(uint8_t *)arg = b;
1556 break;
1557 case CHR_IOCTL_PP_WRITE_DATA:
1558 b = *(uint8_t *)arg;
1559 if (ioctl(fd, PPWDATA, &b) < 0)
1560 return -ENOTSUP;
1561 break;
1562 case CHR_IOCTL_PP_READ_CONTROL:
1563 if (ioctl(fd, PPRCONTROL, &b) < 0)
1564 return -ENOTSUP;
1565 /* Linux gives only the lowest bits, and no way to know data
1566 direction! For better compatibility set the fixed upper
1567 bits. */
1568 *(uint8_t *)arg = b | 0xc0;
1569 break;
1570 case CHR_IOCTL_PP_WRITE_CONTROL:
1571 b = *(uint8_t *)arg;
1572 if (ioctl(fd, PPWCONTROL, &b) < 0)
1573 return -ENOTSUP;
1574 break;
1575 case CHR_IOCTL_PP_READ_STATUS:
1576 if (ioctl(fd, PPRSTATUS, &b) < 0)
1577 return -ENOTSUP;
1578 *(uint8_t *)arg = b;
1579 break;
1580 case CHR_IOCTL_PP_DATA_DIR:
1581 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1582 return -ENOTSUP;
1583 break;
1584 case CHR_IOCTL_PP_EPP_READ_ADDR:
1585 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1586 struct ParallelIOArg *parg = arg;
1587 int n = read(fd, parg->buffer, parg->count);
1588 if (n != parg->count) {
1589 return -EIO;
1590 }
1591 }
1592 break;
1593 case CHR_IOCTL_PP_EPP_READ:
1594 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1595 struct ParallelIOArg *parg = arg;
1596 int n = read(fd, parg->buffer, parg->count);
1597 if (n != parg->count) {
1598 return -EIO;
1599 }
1600 }
1601 break;
1602 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1603 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1604 struct ParallelIOArg *parg = arg;
1605 int n = write(fd, parg->buffer, parg->count);
1606 if (n != parg->count) {
1607 return -EIO;
1608 }
1609 }
1610 break;
1611 case CHR_IOCTL_PP_EPP_WRITE:
1612 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1613 struct ParallelIOArg *parg = arg;
1614 int n = write(fd, parg->buffer, parg->count);
1615 if (n != parg->count) {
1616 return -EIO;
1617 }
1618 }
1619 break;
1620 default:
1621 return -ENOTSUP;
1622 }
1623 return 0;
1624 }
1625
1626 static void pp_close(CharDriverState *chr)
1627 {
1628 ParallelCharDriver *drv = chr->opaque;
1629 int fd = drv->fd;
1630
1631 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1632 ioctl(fd, PPRELEASE);
1633 close(fd);
1634 g_free(drv);
1635 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1636 }
1637
1638 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1639 {
1640 CharDriverState *chr;
1641 ParallelCharDriver *drv;
1642
1643 if (ioctl(fd, PPCLAIM) < 0) {
1644 close(fd);
1645 return NULL;
1646 }
1647
1648 drv = g_malloc0(sizeof(ParallelCharDriver));
1649 drv->fd = fd;
1650 drv->mode = IEEE1284_MODE_COMPAT;
1651
1652 chr = qemu_chr_alloc();
1653 chr->chr_write = null_chr_write;
1654 chr->chr_ioctl = pp_ioctl;
1655 chr->chr_close = pp_close;
1656 chr->opaque = drv;
1657
1658 return chr;
1659 }
1660 #endif /* __linux__ */
1661
1662 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1663
1664 #define HAVE_CHARDEV_PARPORT 1
1665
1666 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1667 {
1668 int fd = (int)(intptr_t)chr->opaque;
1669 uint8_t b;
1670
1671 switch(cmd) {
1672 case CHR_IOCTL_PP_READ_DATA:
1673 if (ioctl(fd, PPIGDATA, &b) < 0)
1674 return -ENOTSUP;
1675 *(uint8_t *)arg = b;
1676 break;
1677 case CHR_IOCTL_PP_WRITE_DATA:
1678 b = *(uint8_t *)arg;
1679 if (ioctl(fd, PPISDATA, &b) < 0)
1680 return -ENOTSUP;
1681 break;
1682 case CHR_IOCTL_PP_READ_CONTROL:
1683 if (ioctl(fd, PPIGCTRL, &b) < 0)
1684 return -ENOTSUP;
1685 *(uint8_t *)arg = b;
1686 break;
1687 case CHR_IOCTL_PP_WRITE_CONTROL:
1688 b = *(uint8_t *)arg;
1689 if (ioctl(fd, PPISCTRL, &b) < 0)
1690 return -ENOTSUP;
1691 break;
1692 case CHR_IOCTL_PP_READ_STATUS:
1693 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1694 return -ENOTSUP;
1695 *(uint8_t *)arg = b;
1696 break;
1697 default:
1698 return -ENOTSUP;
1699 }
1700 return 0;
1701 }
1702
1703 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1704 {
1705 CharDriverState *chr;
1706
1707 chr = qemu_chr_alloc();
1708 chr->opaque = (void *)(intptr_t)fd;
1709 chr->chr_write = null_chr_write;
1710 chr->chr_ioctl = pp_ioctl;
1711 chr->explicit_be_open = true;
1712 return chr;
1713 }
1714 #endif
1715
1716 #else /* _WIN32 */
1717
1718 typedef struct {
1719 int max_size;
1720 HANDLE hcom, hrecv, hsend;
1721 OVERLAPPED orecv;
1722 BOOL fpipe;
1723 DWORD len;
1724
1725 /* Protected by the CharDriverState chr_write_lock. */
1726 OVERLAPPED osend;
1727 } WinCharState;
1728
1729 typedef struct {
1730 HANDLE hStdIn;
1731 HANDLE hInputReadyEvent;
1732 HANDLE hInputDoneEvent;
1733 HANDLE hInputThread;
1734 uint8_t win_stdio_buf;
1735 } WinStdioCharState;
1736
1737 #define NSENDBUF 2048
1738 #define NRECVBUF 2048
1739 #define MAXCONNECT 1
1740 #define NTIMEOUT 5000
1741
1742 static int win_chr_poll(void *opaque);
1743 static int win_chr_pipe_poll(void *opaque);
1744
1745 static void win_chr_close(CharDriverState *chr)
1746 {
1747 WinCharState *s = chr->opaque;
1748
1749 if (s->hsend) {
1750 CloseHandle(s->hsend);
1751 s->hsend = NULL;
1752 }
1753 if (s->hrecv) {
1754 CloseHandle(s->hrecv);
1755 s->hrecv = NULL;
1756 }
1757 if (s->hcom) {
1758 CloseHandle(s->hcom);
1759 s->hcom = NULL;
1760 }
1761 if (s->fpipe)
1762 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1763 else
1764 qemu_del_polling_cb(win_chr_poll, chr);
1765
1766 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1767 }
1768
1769 static int win_chr_init(CharDriverState *chr, const char *filename)
1770 {
1771 WinCharState *s = chr->opaque;
1772 COMMCONFIG comcfg;
1773 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1774 COMSTAT comstat;
1775 DWORD size;
1776 DWORD err;
1777
1778 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1779 if (!s->hsend) {
1780 fprintf(stderr, "Failed CreateEvent\n");
1781 goto fail;
1782 }
1783 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1784 if (!s->hrecv) {
1785 fprintf(stderr, "Failed CreateEvent\n");
1786 goto fail;
1787 }
1788
1789 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1790 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1791 if (s->hcom == INVALID_HANDLE_VALUE) {
1792 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1793 s->hcom = NULL;
1794 goto fail;
1795 }
1796
1797 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1798 fprintf(stderr, "Failed SetupComm\n");
1799 goto fail;
1800 }
1801
1802 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1803 size = sizeof(COMMCONFIG);
1804 GetDefaultCommConfig(filename, &comcfg, &size);
1805 comcfg.dcb.DCBlength = sizeof(DCB);
1806 CommConfigDialog(filename, NULL, &comcfg);
1807
1808 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1809 fprintf(stderr, "Failed SetCommState\n");
1810 goto fail;
1811 }
1812
1813 if (!SetCommMask(s->hcom, EV_ERR)) {
1814 fprintf(stderr, "Failed SetCommMask\n");
1815 goto fail;
1816 }
1817
1818 cto.ReadIntervalTimeout = MAXDWORD;
1819 if (!SetCommTimeouts(s->hcom, &cto)) {
1820 fprintf(stderr, "Failed SetCommTimeouts\n");
1821 goto fail;
1822 }
1823
1824 if (!ClearCommError(s->hcom, &err, &comstat)) {
1825 fprintf(stderr, "Failed ClearCommError\n");
1826 goto fail;
1827 }
1828 qemu_add_polling_cb(win_chr_poll, chr);
1829 return 0;
1830
1831 fail:
1832 win_chr_close(chr);
1833 return -1;
1834 }
1835
1836 /* Called with chr_write_lock held. */
1837 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1838 {
1839 WinCharState *s = chr->opaque;
1840 DWORD len, ret, size, err;
1841
1842 len = len1;
1843 ZeroMemory(&s->osend, sizeof(s->osend));
1844 s->osend.hEvent = s->hsend;
1845 while (len > 0) {
1846 if (s->hsend)
1847 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1848 else
1849 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1850 if (!ret) {
1851 err = GetLastError();
1852 if (err == ERROR_IO_PENDING) {
1853 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1854 if (ret) {
1855 buf += size;
1856 len -= size;
1857 } else {
1858 break;
1859 }
1860 } else {
1861 break;
1862 }
1863 } else {
1864 buf += size;
1865 len -= size;
1866 }
1867 }
1868 return len1 - len;
1869 }
1870
1871 static int win_chr_read_poll(CharDriverState *chr)
1872 {
1873 WinCharState *s = chr->opaque;
1874
1875 s->max_size = qemu_chr_be_can_write(chr);
1876 return s->max_size;
1877 }
1878
1879 static void win_chr_readfile(CharDriverState *chr)
1880 {
1881 WinCharState *s = chr->opaque;
1882 int ret, err;
1883 uint8_t buf[READ_BUF_LEN];
1884 DWORD size;
1885
1886 ZeroMemory(&s->orecv, sizeof(s->orecv));
1887 s->orecv.hEvent = s->hrecv;
1888 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1889 if (!ret) {
1890 err = GetLastError();
1891 if (err == ERROR_IO_PENDING) {
1892 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1893 }
1894 }
1895
1896 if (size > 0) {
1897 qemu_chr_be_write(chr, buf, size);
1898 }
1899 }
1900
1901 static void win_chr_read(CharDriverState *chr)
1902 {
1903 WinCharState *s = chr->opaque;
1904
1905 if (s->len > s->max_size)
1906 s->len = s->max_size;
1907 if (s->len == 0)
1908 return;
1909
1910 win_chr_readfile(chr);
1911 }
1912
1913 static int win_chr_poll(void *opaque)
1914 {
1915 CharDriverState *chr = opaque;
1916 WinCharState *s = chr->opaque;
1917 COMSTAT status;
1918 DWORD comerr;
1919
1920 ClearCommError(s->hcom, &comerr, &status);
1921 if (status.cbInQue > 0) {
1922 s->len = status.cbInQue;
1923 win_chr_read_poll(chr);
1924 win_chr_read(chr);
1925 return 1;
1926 }
1927 return 0;
1928 }
1929
1930 static CharDriverState *qemu_chr_open_win_path(const char *filename)
1931 {
1932 CharDriverState *chr;
1933 WinCharState *s;
1934
1935 chr = qemu_chr_alloc();
1936 s = g_malloc0(sizeof(WinCharState));
1937 chr->opaque = s;
1938 chr->chr_write = win_chr_write;
1939 chr->chr_close = win_chr_close;
1940
1941 if (win_chr_init(chr, filename) < 0) {
1942 g_free(s);
1943 g_free(chr);
1944 return NULL;
1945 }
1946 return chr;
1947 }
1948
1949 static int win_chr_pipe_poll(void *opaque)
1950 {
1951 CharDriverState *chr = opaque;
1952 WinCharState *s = chr->opaque;
1953 DWORD size;
1954
1955 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1956 if (size > 0) {
1957 s->len = size;
1958 win_chr_read_poll(chr);
1959 win_chr_read(chr);
1960 return 1;
1961 }
1962 return 0;
1963 }
1964
1965 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1966 {
1967 WinCharState *s = chr->opaque;
1968 OVERLAPPED ov;
1969 int ret;
1970 DWORD size;
1971 char openname[256];
1972
1973 s->fpipe = TRUE;
1974
1975 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1976 if (!s->hsend) {
1977 fprintf(stderr, "Failed CreateEvent\n");
1978 goto fail;
1979 }
1980 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1981 if (!s->hrecv) {
1982 fprintf(stderr, "Failed CreateEvent\n");
1983 goto fail;
1984 }
1985
1986 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1987 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1988 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1989 PIPE_WAIT,
1990 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1991 if (s->hcom == INVALID_HANDLE_VALUE) {
1992 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1993 s->hcom = NULL;
1994 goto fail;
1995 }
1996
1997 ZeroMemory(&ov, sizeof(ov));
1998 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1999 ret = ConnectNamedPipe(s->hcom, &ov);
2000 if (ret) {
2001 fprintf(stderr, "Failed ConnectNamedPipe\n");
2002 goto fail;
2003 }
2004
2005 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
2006 if (!ret) {
2007 fprintf(stderr, "Failed GetOverlappedResult\n");
2008 if (ov.hEvent) {
2009 CloseHandle(ov.hEvent);
2010 ov.hEvent = NULL;
2011 }
2012 goto fail;
2013 }
2014
2015 if (ov.hEvent) {
2016 CloseHandle(ov.hEvent);
2017 ov.hEvent = NULL;
2018 }
2019 qemu_add_polling_cb(win_chr_pipe_poll, chr);
2020 return 0;
2021
2022 fail:
2023 win_chr_close(chr);
2024 return -1;
2025 }
2026
2027
2028 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
2029 {
2030 const char *filename = opts->device;
2031 CharDriverState *chr;
2032 WinCharState *s;
2033
2034 chr = qemu_chr_alloc();
2035 s = g_malloc0(sizeof(WinCharState));
2036 chr->opaque = s;
2037 chr->chr_write = win_chr_write;
2038 chr->chr_close = win_chr_close;
2039
2040 if (win_chr_pipe_init(chr, filename) < 0) {
2041 g_free(s);
2042 g_free(chr);
2043 return NULL;
2044 }
2045 return chr;
2046 }
2047
2048 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
2049 {
2050 CharDriverState *chr;
2051 WinCharState *s;
2052
2053 chr = qemu_chr_alloc();
2054 s = g_malloc0(sizeof(WinCharState));
2055 s->hcom = fd_out;
2056 chr->opaque = s;
2057 chr->chr_write = win_chr_write;
2058 return chr;
2059 }
2060
2061 static CharDriverState *qemu_chr_open_win_con(void)
2062 {
2063 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
2064 }
2065
2066 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
2067 {
2068 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
2069 DWORD dwSize;
2070 int len1;
2071
2072 len1 = len;
2073
2074 while (len1 > 0) {
2075 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
2076 break;
2077 }
2078 buf += dwSize;
2079 len1 -= dwSize;
2080 }
2081
2082 return len - len1;
2083 }
2084
2085 static void win_stdio_wait_func(void *opaque)
2086 {
2087 CharDriverState *chr = opaque;
2088 WinStdioCharState *stdio = chr->opaque;
2089 INPUT_RECORD buf[4];
2090 int ret;
2091 DWORD dwSize;
2092 int i;
2093
2094 ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize);
2095
2096 if (!ret) {
2097 /* Avoid error storm */
2098 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2099 return;
2100 }
2101
2102 for (i = 0; i < dwSize; i++) {
2103 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2104
2105 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2106 int j;
2107 if (kev->uChar.AsciiChar != 0) {
2108 for (j = 0; j < kev->wRepeatCount; j++) {
2109 if (qemu_chr_be_can_write(chr)) {
2110 uint8_t c = kev->uChar.AsciiChar;
2111 qemu_chr_be_write(chr, &c, 1);
2112 }
2113 }
2114 }
2115 }
2116 }
2117 }
2118
2119 static DWORD WINAPI win_stdio_thread(LPVOID param)
2120 {
2121 CharDriverState *chr = param;
2122 WinStdioCharState *stdio = chr->opaque;
2123 int ret;
2124 DWORD dwSize;
2125
2126 while (1) {
2127
2128 /* Wait for one byte */
2129 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2130
2131 /* Exit in case of error, continue if nothing read */
2132 if (!ret) {
2133 break;
2134 }
2135 if (!dwSize) {
2136 continue;
2137 }
2138
2139 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2140 if (stdio->win_stdio_buf == '\r') {
2141 continue;
2142 }
2143
2144 /* Signal the main thread and wait until the byte was eaten */
2145 if (!SetEvent(stdio->hInputReadyEvent)) {
2146 break;
2147 }
2148 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2149 != WAIT_OBJECT_0) {
2150 break;
2151 }
2152 }
2153
2154 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2155 return 0;
2156 }
2157
2158 static void win_stdio_thread_wait_func(void *opaque)
2159 {
2160 CharDriverState *chr = opaque;
2161 WinStdioCharState *stdio = chr->opaque;
2162
2163 if (qemu_chr_be_can_write(chr)) {
2164 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2165 }
2166
2167 SetEvent(stdio->hInputDoneEvent);
2168 }
2169
2170 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2171 {
2172 WinStdioCharState *stdio = chr->opaque;
2173 DWORD dwMode = 0;
2174
2175 GetConsoleMode(stdio->hStdIn, &dwMode);
2176
2177 if (echo) {
2178 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2179 } else {
2180 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2181 }
2182 }
2183
2184 static void win_stdio_close(CharDriverState *chr)
2185 {
2186 WinStdioCharState *stdio = chr->opaque;
2187
2188 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2189 CloseHandle(stdio->hInputReadyEvent);
2190 }
2191 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2192 CloseHandle(stdio->hInputDoneEvent);
2193 }
2194 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2195 TerminateThread(stdio->hInputThread, 0);
2196 }
2197
2198 g_free(chr->opaque);
2199 g_free(chr);
2200 }
2201
2202 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
2203 {
2204 CharDriverState *chr;
2205 WinStdioCharState *stdio;
2206 DWORD dwMode;
2207 int is_console = 0;
2208
2209 chr = qemu_chr_alloc();
2210 stdio = g_malloc0(sizeof(WinStdioCharState));
2211
2212 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2213 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2214 fprintf(stderr, "cannot open stdio: invalid handle\n");
2215 exit(1);
2216 }
2217
2218 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2219
2220 chr->opaque = stdio;
2221 chr->chr_write = win_stdio_write;
2222 chr->chr_close = win_stdio_close;
2223
2224 if (is_console) {
2225 if (qemu_add_wait_object(stdio->hStdIn,
2226 win_stdio_wait_func, chr)) {
2227 fprintf(stderr, "qemu_add_wait_object: failed\n");
2228 }
2229 } else {
2230 DWORD dwId;
2231
2232 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2233 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2234 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2235 chr, 0, &dwId);
2236
2237 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2238 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2239 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2240 fprintf(stderr, "cannot create stdio thread or event\n");
2241 exit(1);
2242 }
2243 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2244 win_stdio_thread_wait_func, chr)) {
2245 fprintf(stderr, "qemu_add_wait_object: failed\n");
2246 }
2247 }
2248
2249 dwMode |= ENABLE_LINE_INPUT;
2250
2251 if (is_console) {
2252 /* set the terminal in raw mode */
2253 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2254 dwMode |= ENABLE_PROCESSED_INPUT;
2255 }
2256
2257 SetConsoleMode(stdio->hStdIn, dwMode);
2258
2259 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2260 qemu_chr_fe_set_echo(chr, false);
2261
2262 return chr;
2263 }
2264 #endif /* !_WIN32 */
2265
2266
2267 /***********************************************************/
2268 /* UDP Net console */
2269
2270 typedef struct {
2271 int fd;
2272 GIOChannel *chan;
2273 uint8_t buf[READ_BUF_LEN];
2274 int bufcnt;
2275 int bufptr;
2276 int max_size;
2277 } NetCharDriver;
2278
2279 /* Called with chr_write_lock held. */
2280 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2281 {
2282 NetCharDriver *s = chr->opaque;
2283 gsize bytes_written;
2284 GIOStatus status;
2285
2286 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2287 if (status == G_IO_STATUS_EOF) {
2288 return 0;
2289 } else if (status != G_IO_STATUS_NORMAL) {
2290 return -1;
2291 }
2292
2293 return bytes_written;
2294 }
2295
2296 static int udp_chr_read_poll(void *opaque)
2297 {
2298 CharDriverState *chr = opaque;
2299 NetCharDriver *s = chr->opaque;
2300
2301 s->max_size = qemu_chr_be_can_write(chr);
2302
2303 /* If there were any stray characters in the queue process them
2304 * first
2305 */
2306 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2307 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2308 s->bufptr++;
2309 s->max_size = qemu_chr_be_can_write(chr);
2310 }
2311 return s->max_size;
2312 }
2313
2314 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2315 {
2316 CharDriverState *chr = opaque;
2317 NetCharDriver *s = chr->opaque;
2318 gsize bytes_read = 0;
2319 GIOStatus status;
2320
2321 if (s->max_size == 0) {
2322 return TRUE;
2323 }
2324 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2325 &bytes_read, NULL);
2326 s->bufcnt = bytes_read;
2327 s->bufptr = s->bufcnt;
2328 if (status != G_IO_STATUS_NORMAL) {
2329 remove_fd_in_watch(chr);
2330 return FALSE;
2331 }
2332
2333 s->bufptr = 0;
2334 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2335 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2336 s->bufptr++;
2337 s->max_size = qemu_chr_be_can_write(chr);
2338 }
2339
2340 return TRUE;
2341 }
2342
2343 static void udp_chr_update_read_handler(CharDriverState *chr)
2344 {
2345 NetCharDriver *s = chr->opaque;
2346
2347 remove_fd_in_watch(chr);
2348 if (s->chan) {
2349 chr->fd_in_tag = io_add_watch_poll(s->chan, udp_chr_read_poll,
2350 udp_chr_read, chr);
2351 }
2352 }
2353
2354 static void udp_chr_close(CharDriverState *chr)
2355 {
2356 NetCharDriver *s = chr->opaque;
2357
2358 remove_fd_in_watch(chr);
2359 if (s->chan) {
2360 g_io_channel_unref(s->chan);
2361 closesocket(s->fd);
2362 }
2363 g_free(s);
2364 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2365 }
2366
2367 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2368 {
2369 CharDriverState *chr = NULL;
2370 NetCharDriver *s = NULL;
2371
2372 chr = qemu_chr_alloc();
2373 s = g_malloc0(sizeof(NetCharDriver));
2374
2375 s->fd = fd;
2376 s->chan = io_channel_from_socket(s->fd);
2377 s->bufcnt = 0;
2378 s->bufptr = 0;
2379 chr->opaque = s;
2380 chr->chr_write = udp_chr_write;
2381 chr->chr_update_read_handler = udp_chr_update_read_handler;
2382 chr->chr_close = udp_chr_close;
2383 /* be isn't opened until we get a connection */
2384 chr->explicit_be_open = true;
2385 return chr;
2386 }
2387
2388 /***********************************************************/
2389 /* TCP Net console */
2390
2391 typedef struct {
2392
2393 GIOChannel *chan, *listen_chan;
2394 guint listen_tag;
2395 int fd, listen_fd;
2396 int connected;
2397 int max_size;
2398 int do_telnetopt;
2399 int do_nodelay;
2400 int is_unix;
2401 int *read_msgfds;
2402 int read_msgfds_num;
2403 int *write_msgfds;
2404 int write_msgfds_num;
2405 } TCPCharDriver;
2406
2407 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2408
2409 #ifndef _WIN32
2410 static int unix_send_msgfds(CharDriverState *chr, const uint8_t *buf, int len)
2411 {
2412 TCPCharDriver *s = chr->opaque;
2413 struct msghdr msgh;
2414 struct iovec iov;
2415 int r;
2416
2417 size_t fd_size = s->write_msgfds_num * sizeof(int);
2418 char control[CMSG_SPACE(fd_size)];
2419 struct cmsghdr *cmsg;
2420
2421 memset(&msgh, 0, sizeof(msgh));
2422 memset(control, 0, sizeof(control));
2423
2424 /* set the payload */
2425 iov.iov_base = (uint8_t *) buf;
2426 iov.iov_len = len;
2427
2428 msgh.msg_iov = &iov;
2429 msgh.msg_iovlen = 1;
2430
2431 msgh.msg_control = control;
2432 msgh.msg_controllen = sizeof(control);
2433
2434 cmsg = CMSG_FIRSTHDR(&msgh);
2435
2436 cmsg->cmsg_len = CMSG_LEN(fd_size);
2437 cmsg->cmsg_level = SOL_SOCKET;
2438 cmsg->cmsg_type = SCM_RIGHTS;
2439 memcpy(CMSG_DATA(cmsg), s->write_msgfds, fd_size);
2440
2441 do {
2442 r = sendmsg(s->fd, &msgh, 0);
2443 } while (r < 0 && errno == EINTR);
2444
2445 /* free the written msgfds, no matter what */
2446 if (s->write_msgfds_num) {
2447 g_free(s->write_msgfds);
2448 s->write_msgfds = 0;
2449 s->write_msgfds_num = 0;
2450 }
2451
2452 return r;
2453 }
2454 #endif
2455
2456 /* Called with chr_write_lock held. */
2457 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2458 {
2459 TCPCharDriver *s = chr->opaque;
2460 if (s->connected) {
2461 #ifndef _WIN32
2462 if (s->is_unix && s->write_msgfds_num) {
2463 return unix_send_msgfds(chr, buf, len);
2464 } else
2465 #endif
2466 {
2467 return io_channel_send(s->chan, buf, len);
2468 }
2469 } else {
2470 /* XXX: indicate an error ? */
2471 return len;
2472 }
2473 }
2474
2475 static int tcp_chr_read_poll(void *opaque)
2476 {
2477 CharDriverState *chr = opaque;
2478 TCPCharDriver *s = chr->opaque;
2479 if (!s->connected)
2480 return 0;
2481 s->max_size = qemu_chr_be_can_write(chr);
2482 return s->max_size;
2483 }
2484
2485 #define IAC 255
2486 #define IAC_BREAK 243
2487 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2488 TCPCharDriver *s,
2489 uint8_t *buf, int *size)
2490 {
2491 /* Handle any telnet client's basic IAC options to satisfy char by
2492 * char mode with no echo. All IAC options will be removed from
2493 * the buf and the do_telnetopt variable will be used to track the
2494 * state of the width of the IAC information.
2495 *
2496 * IAC commands come in sets of 3 bytes with the exception of the
2497 * "IAC BREAK" command and the double IAC.
2498 */
2499
2500 int i;
2501 int j = 0;
2502
2503 for (i = 0; i < *size; i++) {
2504 if (s->do_telnetopt > 1) {
2505 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2506 /* Double IAC means send an IAC */
2507 if (j != i)
2508 buf[j] = buf[i];
2509 j++;
2510 s->do_telnetopt = 1;
2511 } else {
2512 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2513 /* Handle IAC break commands by sending a serial break */
2514 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2515 s->do_telnetopt++;
2516 }
2517 s->do_telnetopt++;
2518 }
2519 if (s->do_telnetopt >= 4) {
2520 s->do_telnetopt = 1;
2521 }
2522 } else {
2523 if ((unsigned char)buf[i] == IAC) {
2524 s->do_telnetopt = 2;
2525 } else {
2526 if (j != i)
2527 buf[j] = buf[i];
2528 j++;
2529 }
2530 }
2531 }
2532 *size = j;
2533 }
2534
2535 static int tcp_get_msgfds(CharDriverState *chr, int *fds, int num)
2536 {
2537 TCPCharDriver *s = chr->opaque;
2538 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
2539
2540 if (to_copy) {
2541 int i;
2542
2543 memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
2544
2545 /* Close unused fds */
2546 for (i = to_copy; i < s->read_msgfds_num; i++) {
2547 close(s->read_msgfds[i]);
2548 }
2549
2550 g_free(s->read_msgfds);
2551 s->read_msgfds = 0;
2552 s->read_msgfds_num = 0;
2553 }
2554
2555 return to_copy;
2556 }
2557
2558 static int tcp_set_msgfds(CharDriverState *chr, int *fds, int num)
2559 {
2560 TCPCharDriver *s = chr->opaque;
2561
2562 /* clear old pending fd array */
2563 if (s->write_msgfds) {
2564 g_free(s->write_msgfds);
2565 }
2566
2567 if (num) {
2568 s->write_msgfds = g_malloc(num * sizeof(int));
2569 memcpy(s->write_msgfds, fds, num * sizeof(int));
2570 }
2571
2572 s->write_msgfds_num = num;
2573
2574 return 0;
2575 }
2576
2577 #ifndef _WIN32
2578 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2579 {
2580 TCPCharDriver *s = chr->opaque;
2581 struct cmsghdr *cmsg;
2582
2583 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2584 int fd_size, i;
2585
2586 if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) ||
2587 cmsg->cmsg_level != SOL_SOCKET ||
2588 cmsg->cmsg_type != SCM_RIGHTS) {
2589 continue;
2590 }
2591
2592 fd_size = cmsg->cmsg_len - CMSG_LEN(0);
2593
2594 if (!fd_size) {
2595 continue;
2596 }
2597
2598 /* close and clean read_msgfds */
2599 for (i = 0; i < s->read_msgfds_num; i++) {
2600 close(s->read_msgfds[i]);
2601 }
2602
2603 if (s->read_msgfds_num) {
2604 g_free(s->read_msgfds);
2605 }
2606
2607 s->read_msgfds_num = fd_size / sizeof(int);
2608 s->read_msgfds = g_malloc(fd_size);
2609 memcpy(s->read_msgfds, CMSG_DATA(cmsg), fd_size);
2610
2611 for (i = 0; i < s->read_msgfds_num; i++) {
2612 int fd = s->read_msgfds[i];
2613 if (fd < 0) {
2614 continue;
2615 }
2616
2617 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2618 qemu_set_block(fd);
2619
2620 #ifndef MSG_CMSG_CLOEXEC
2621 qemu_set_cloexec(fd);
2622 #endif
2623 }
2624 }
2625 }
2626
2627 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2628 {
2629 TCPCharDriver *s = chr->opaque;
2630 struct msghdr msg = { NULL, };
2631 struct iovec iov[1];
2632 union {
2633 struct cmsghdr cmsg;
2634 char control[CMSG_SPACE(sizeof(int))];
2635 } msg_control;
2636 int flags = 0;
2637 ssize_t ret;
2638
2639 iov[0].iov_base = buf;
2640 iov[0].iov_len = len;
2641
2642 msg.msg_iov = iov;
2643 msg.msg_iovlen = 1;
2644 msg.msg_control = &msg_control;
2645 msg.msg_controllen = sizeof(msg_control);
2646
2647 #ifdef MSG_CMSG_CLOEXEC
2648 flags |= MSG_CMSG_CLOEXEC;
2649 #endif
2650 ret = recvmsg(s->fd, &msg, flags);
2651 if (ret > 0 && s->is_unix) {
2652 unix_process_msgfd(chr, &msg);
2653 }
2654
2655 return ret;
2656 }
2657 #else
2658 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2659 {
2660 TCPCharDriver *s = chr->opaque;
2661 return qemu_recv(s->fd, buf, len, 0);
2662 }
2663 #endif
2664
2665 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2666 {
2667 TCPCharDriver *s = chr->opaque;
2668 return g_io_create_watch(s->chan, cond);
2669 }
2670
2671 static void tcp_chr_disconnect(CharDriverState *chr)
2672 {
2673 TCPCharDriver *s = chr->opaque;
2674
2675 s->connected = 0;
2676 if (s->listen_chan) {
2677 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN,
2678 tcp_chr_accept, chr);
2679 }
2680 remove_fd_in_watch(chr);
2681 g_io_channel_unref(s->chan);
2682 s->chan = NULL;
2683 closesocket(s->fd);
2684 s->fd = -1;
2685 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2686 }
2687
2688 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2689 {
2690 CharDriverState *chr = opaque;
2691 TCPCharDriver *s = chr->opaque;
2692 uint8_t buf[READ_BUF_LEN];
2693 int len, size;
2694
2695 if (cond & G_IO_HUP) {
2696 /* connection closed */
2697 tcp_chr_disconnect(chr);
2698 return TRUE;
2699 }
2700
2701 if (!s->connected || s->max_size <= 0) {
2702 return TRUE;
2703 }
2704 len = sizeof(buf);
2705 if (len > s->max_size)
2706 len = s->max_size;
2707 size = tcp_chr_recv(chr, (void *)buf, len);
2708 if (size == 0) {
2709 /* connection closed */
2710 tcp_chr_disconnect(chr);
2711 } else if (size > 0) {
2712 if (s->do_telnetopt)
2713 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2714 if (size > 0)
2715 qemu_chr_be_write(chr, buf, size);
2716 }
2717
2718 return TRUE;
2719 }
2720
2721 static int tcp_chr_sync_read(CharDriverState *chr, const uint8_t *buf, int len)
2722 {
2723 TCPCharDriver *s = chr->opaque;
2724 int size;
2725
2726 if (!s->connected) {
2727 return 0;
2728 }
2729
2730 size = tcp_chr_recv(chr, (void *) buf, len);
2731 if (size == 0) {
2732 /* connection closed */
2733 tcp_chr_disconnect(chr);
2734 }
2735
2736 return size;
2737 }
2738
2739 #ifndef _WIN32
2740 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2741 {
2742 CharDriverState *chr = qemu_chr_open_fd(eventfd, eventfd);
2743
2744 if (chr) {
2745 chr->avail_connections = 1;
2746 }
2747
2748 return chr;
2749 }
2750 #endif
2751
2752 static void tcp_chr_connect(void *opaque)
2753 {
2754 CharDriverState *chr = opaque;
2755 TCPCharDriver *s = chr->opaque;
2756
2757 s->connected = 1;
2758 if (s->chan) {
2759 chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
2760 tcp_chr_read, chr);
2761 }
2762 qemu_chr_be_generic_open(chr);
2763 }
2764
2765 static void tcp_chr_update_read_handler(CharDriverState *chr)
2766 {
2767 TCPCharDriver *s = chr->opaque;
2768
2769 remove_fd_in_watch(chr);
2770 if (s->chan) {
2771 chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
2772 tcp_chr_read, chr);
2773 }
2774 }
2775
2776 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2777 static void tcp_chr_telnet_init(int fd)
2778 {
2779 char buf[3];
2780 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2781 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2782 send(fd, (char *)buf, 3, 0);
2783 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2784 send(fd, (char *)buf, 3, 0);
2785 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2786 send(fd, (char *)buf, 3, 0);
2787 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2788 send(fd, (char *)buf, 3, 0);
2789 }
2790
2791 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2792 {
2793 TCPCharDriver *s = chr->opaque;
2794 if (s->fd != -1)
2795 return -1;
2796
2797 qemu_set_nonblock(fd);
2798 if (s->do_nodelay)
2799 socket_set_nodelay(fd);
2800 s->fd = fd;
2801 s->chan = io_channel_from_socket(fd);
2802 if (s->listen_tag) {
2803 g_source_remove(s->listen_tag);
2804 s->listen_tag = 0;
2805 }
2806 tcp_chr_connect(chr);
2807
2808 return 0;
2809 }
2810
2811 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
2812 {
2813 CharDriverState *chr = opaque;
2814 TCPCharDriver *s = chr->opaque;
2815 struct sockaddr_in saddr;
2816 #ifndef _WIN32
2817 struct sockaddr_un uaddr;
2818 #endif
2819 struct sockaddr *addr;
2820 socklen_t len;
2821 int fd;
2822
2823 for(;;) {
2824 #ifndef _WIN32
2825 if (s->is_unix) {
2826 len = sizeof(uaddr);
2827 addr = (struct sockaddr *)&uaddr;
2828 } else
2829 #endif
2830 {
2831 len = sizeof(saddr);
2832 addr = (struct sockaddr *)&saddr;
2833 }
2834 fd = qemu_accept(s->listen_fd, addr, &len);
2835 if (fd < 0 && errno != EINTR) {
2836 s->listen_tag = 0;
2837 return FALSE;
2838 } else if (fd >= 0) {
2839 if (s->do_telnetopt)
2840 tcp_chr_telnet_init(fd);
2841 break;
2842 }
2843 }
2844 if (tcp_chr_add_client(chr, fd) < 0)
2845 close(fd);
2846
2847 return TRUE;
2848 }
2849
2850 static void tcp_chr_close(CharDriverState *chr)
2851 {
2852 TCPCharDriver *s = chr->opaque;
2853 int i;
2854 if (s->fd >= 0) {
2855 remove_fd_in_watch(chr);
2856 if (s->chan) {
2857 g_io_channel_unref(s->chan);
2858 }
2859 closesocket(s->fd);
2860 }
2861 if (s->listen_fd >= 0) {
2862 if (s->listen_tag) {
2863 g_source_remove(s->listen_tag);
2864 s->listen_tag = 0;
2865 }
2866 if (s->listen_chan) {
2867 g_io_channel_unref(s->listen_chan);
2868 }
2869 closesocket(s->listen_fd);
2870 }
2871 if (s->read_msgfds_num) {
2872 for (i = 0; i < s->read_msgfds_num; i++) {
2873 close(s->read_msgfds[i]);
2874 }
2875 g_free(s->read_msgfds);
2876 }
2877 if (s->write_msgfds_num) {
2878 g_free(s->write_msgfds);
2879 }
2880 g_free(s);
2881 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2882 }
2883
2884 static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
2885 bool is_listen, bool is_telnet,
2886 bool is_waitconnect,
2887 Error **errp)
2888 {
2889 CharDriverState *chr = NULL;
2890 TCPCharDriver *s = NULL;
2891 char host[NI_MAXHOST], serv[NI_MAXSERV];
2892 const char *left = "", *right = "";
2893 struct sockaddr_storage ss;
2894 socklen_t ss_len = sizeof(ss);
2895
2896 memset(&ss, 0, ss_len);
2897 if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2898 error_setg_errno(errp, errno, "getsockname");
2899 return NULL;
2900 }
2901
2902 chr = qemu_chr_alloc();
2903 s = g_malloc0(sizeof(TCPCharDriver));
2904
2905 s->connected = 0;
2906 s->fd = -1;
2907 s->listen_fd = -1;
2908 s->read_msgfds = 0;
2909 s->read_msgfds_num = 0;
2910 s->write_msgfds = 0;
2911 s->write_msgfds_num = 0;
2912
2913 chr->filename = g_malloc(256);
2914 switch (ss.ss_family) {
2915 #ifndef _WIN32
2916 case AF_UNIX:
2917 s->is_unix = 1;
2918 snprintf(chr->filename, 256, "unix:%s%s",
2919 ((struct sockaddr_un *)(&ss))->sun_path,
2920 is_listen ? ",server" : "");
2921 break;
2922 #endif
2923 case AF_INET6:
2924 left = "[";
2925 right = "]";
2926 /* fall through */
2927 case AF_INET:
2928 s->do_nodelay = do_nodelay;
2929 getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
2930 serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
2931 snprintf(chr->filename, 256, "%s:%s%s%s:%s%s",
2932 is_telnet ? "telnet" : "tcp",
2933 left, host, right, serv,
2934 is_listen ? ",server" : "");
2935 break;
2936 }
2937
2938 chr->opaque = s;
2939 chr->chr_write = tcp_chr_write;
2940 chr->chr_sync_read = tcp_chr_sync_read;
2941 chr->chr_close = tcp_chr_close;
2942 chr->get_msgfds = tcp_get_msgfds;
2943 chr->set_msgfds = tcp_set_msgfds;
2944 chr->chr_add_client = tcp_chr_add_client;
2945 chr->chr_add_watch = tcp_chr_add_watch;
2946 chr->chr_update_read_handler = tcp_chr_update_read_handler;
2947 /* be isn't opened until we get a connection */
2948 chr->explicit_be_open = true;
2949
2950 if (is_listen) {
2951 s->listen_fd = fd;
2952 s->listen_chan = io_channel_from_socket(s->listen_fd);
2953 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2954 if (is_telnet) {
2955 s->do_telnetopt = 1;
2956 }
2957 } else {
2958 s->connected = 1;
2959 s->fd = fd;
2960 socket_set_nodelay(fd);
2961 s->chan = io_channel_from_socket(s->fd);
2962 tcp_chr_connect(chr);
2963 }
2964
2965 if (is_listen && is_waitconnect) {
2966 fprintf(stderr, "QEMU waiting for connection on: %s\n",
2967 chr->filename);
2968 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
2969 qemu_set_nonblock(s->listen_fd);
2970 }
2971 return chr;
2972 }
2973
2974 /*********************************************************/
2975 /* Ring buffer chardev */
2976
2977 typedef struct {
2978 size_t size;
2979 size_t prod;
2980 size_t cons;
2981 uint8_t *cbuf;
2982 } RingBufCharDriver;
2983
2984 static size_t ringbuf_count(const CharDriverState *chr)
2985 {
2986 const RingBufCharDriver *d = chr->opaque;
2987
2988 return d->prod - d->cons;
2989 }
2990
2991 /* Called with chr_write_lock held. */
2992 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2993 {
2994 RingBufCharDriver *d = chr->opaque;
2995 int i;
2996
2997 if (!buf || (len < 0)) {
2998 return -1;
2999 }
3000
3001 for (i = 0; i < len; i++ ) {
3002 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
3003 if (d->prod - d->cons > d->size) {
3004 d->cons = d->prod - d->size;
3005 }
3006 }
3007
3008 return 0;
3009 }
3010
3011 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
3012 {
3013 RingBufCharDriver *d = chr->opaque;
3014 int i;
3015
3016 qemu_mutex_lock(&chr->chr_write_lock);
3017 for (i = 0; i < len && d->cons != d->prod; i++) {
3018 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
3019 }
3020 qemu_mutex_unlock(&chr->chr_write_lock);
3021
3022 return i;
3023 }
3024
3025 static void ringbuf_chr_close(struct CharDriverState *chr)
3026 {
3027 RingBufCharDriver *d = chr->opaque;
3028
3029 g_free(d->cbuf);
3030 g_free(d);
3031 chr->opaque = NULL;
3032 }
3033
3034 static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts,
3035 Error **errp)
3036 {
3037 CharDriverState *chr;
3038 RingBufCharDriver *d;
3039
3040 chr = qemu_chr_alloc();
3041 d = g_malloc(sizeof(*d));
3042
3043 d->size = opts->has_size ? opts->size : 65536;
3044
3045 /* The size must be power of 2 */
3046 if (d->size & (d->size - 1)) {
3047 error_setg(errp, "size of ringbuf chardev must be power of two");
3048 goto fail;
3049 }
3050
3051 d->prod = 0;
3052 d->cons = 0;
3053 d->cbuf = g_malloc0(d->size);
3054
3055 chr->opaque = d;
3056 chr->chr_write = ringbuf_chr_write;
3057 chr->chr_close = ringbuf_chr_close;
3058
3059 return chr;
3060
3061 fail:
3062 g_free(d);
3063 g_free(chr);
3064 return NULL;
3065 }
3066
3067 bool chr_is_ringbuf(const CharDriverState *chr)
3068 {
3069 return chr->chr_write == ringbuf_chr_write;
3070 }
3071
3072 void qmp_ringbuf_write(const char *device, const char *data,
3073 bool has_format, enum DataFormat format,
3074 Error **errp)
3075 {
3076 CharDriverState *chr;
3077 const uint8_t *write_data;
3078 int ret;
3079 gsize write_count;
3080
3081 chr = qemu_chr_find(device);
3082 if (!chr) {
3083 error_setg(errp, "Device '%s' not found", device);
3084 return;
3085 }
3086
3087 if (!chr_is_ringbuf(chr)) {
3088 error_setg(errp,"%s is not a ringbuf device", device);
3089 return;
3090 }
3091
3092 if (has_format && (format == DATA_FORMAT_BASE64)) {
3093 write_data = g_base64_decode(data, &write_count);
3094 } else {
3095 write_data = (uint8_t *)data;
3096 write_count = strlen(data);
3097 }
3098
3099 ret = ringbuf_chr_write(chr, write_data, write_count);
3100
3101 if (write_data != (uint8_t *)data) {
3102 g_free((void *)write_data);
3103 }
3104
3105 if (ret < 0) {
3106 error_setg(errp, "Failed to write to device %s", device);
3107 return;
3108 }
3109 }
3110
3111 char *qmp_ringbuf_read(const char *device, int64_t size,
3112 bool has_format, enum DataFormat format,
3113 Error **errp)
3114 {
3115 CharDriverState *chr;
3116 uint8_t *read_data;
3117 size_t count;
3118 char *data;
3119
3120 chr = qemu_chr_find(device);
3121 if (!chr) {
3122 error_setg(errp, "Device '%s' not found", device);
3123 return NULL;
3124 }
3125
3126 if (!chr_is_ringbuf(chr)) {
3127 error_setg(errp,"%s is not a ringbuf device", device);
3128 return NULL;
3129 }
3130
3131 if (size <= 0) {
3132 error_setg(errp, "size must be greater than zero");
3133 return NULL;
3134 }
3135
3136 count = ringbuf_count(chr);
3137 size = size > count ? count : size;
3138 read_data = g_malloc(size + 1);
3139
3140 ringbuf_chr_read(chr, read_data, size);
3141
3142 if (has_format && (format == DATA_FORMAT_BASE64)) {
3143 data = g_base64_encode(read_data, size);
3144 g_free(read_data);
3145 } else {
3146 /*
3147 * FIXME should read only complete, valid UTF-8 characters up
3148 * to @size bytes. Invalid sequences should be replaced by a
3149 * suitable replacement character. Except when (and only
3150 * when) ring buffer lost characters since last read, initial
3151 * continuation characters should be dropped.
3152 */
3153 read_data[size] = 0;
3154 data = (char *)read_data;
3155 }
3156
3157 return data;
3158 }
3159
3160 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
3161 {
3162 char host[65], port[33], width[8], height[8];
3163 int pos;
3164 const char *p;
3165 QemuOpts *opts;
3166 Error *local_err = NULL;
3167
3168 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
3169 if (local_err) {
3170 qerror_report_err(local_err);
3171 error_free(local_err);
3172 return NULL;
3173 }
3174
3175 if (strstart(filename, "mon:", &p)) {
3176 filename = p;
3177 qemu_opt_set(opts, "mux", "on");
3178 if (strcmp(filename, "stdio") == 0) {
3179 /* Monitor is muxed to stdio: do not exit on Ctrl+C by default
3180 * but pass it to the guest. Handle this only for compat syntax,
3181 * for -chardev syntax we have special option for this.
3182 * This is what -nographic did, redirecting+muxing serial+monitor
3183 * to stdio causing Ctrl+C to be passed to guest. */
3184 qemu_opt_set(opts, "signal", "off");
3185 }
3186 }
3187
3188 if (strcmp(filename, "null") == 0 ||
3189 strcmp(filename, "pty") == 0 ||
3190 strcmp(filename, "msmouse") == 0 ||
3191 strcmp(filename, "braille") == 0 ||
3192 strcmp(filename, "testdev") == 0 ||
3193 strcmp(filename, "stdio") == 0) {
3194 qemu_opt_set(opts, "backend", filename);
3195 return opts;
3196 }
3197 if (strstart(filename, "vc", &p)) {
3198 qemu_opt_set(opts, "backend", "vc");
3199 if (*p == ':') {
3200 if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
3201 /* pixels */
3202 qemu_opt_set(opts, "width", width);
3203 qemu_opt_set(opts, "height", height);
3204 } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
3205 /* chars */
3206 qemu_opt_set(opts, "cols", width);
3207 qemu_opt_set(opts, "rows", height);
3208 } else {
3209 goto fail;
3210 }
3211 }
3212 return opts;
3213 }
3214 if (strcmp(filename, "con:") == 0) {
3215 qemu_opt_set(opts, "backend", "console");
3216 return opts;
3217 }
3218 if (strstart(filename, "COM", NULL)) {
3219 qemu_opt_set(opts, "backend", "serial");
3220 qemu_opt_set(opts, "path", filename);
3221 return opts;
3222 }
3223 if (strstart(filename, "file:", &p)) {
3224 qemu_opt_set(opts, "backend", "file");
3225 qemu_opt_set(opts, "path", p);
3226 return opts;
3227 }
3228 if (strstart(filename, "pipe:", &p)) {
3229 qemu_opt_set(opts, "backend", "pipe");
3230 qemu_opt_set(opts, "path", p);
3231 return opts;
3232 }
3233 if (strstart(filename, "tcp:", &p) ||
3234 strstart(filename, "telnet:", &p)) {
3235 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3236 host[0] = 0;
3237 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3238 goto fail;
3239 }
3240 qemu_opt_set(opts, "backend", "socket");
3241 qemu_opt_set(opts, "host", host);
3242 qemu_opt_set(opts, "port", port);
3243 if (p[pos] == ',') {
3244 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
3245 goto fail;
3246 }
3247 if (strstart(filename, "telnet:", &p))
3248 qemu_opt_set(opts, "telnet", "on");
3249 return opts;
3250 }
3251 if (strstart(filename, "udp:", &p)) {
3252 qemu_opt_set(opts, "backend", "udp");
3253 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3254 host[0] = 0;
3255 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3256 goto fail;
3257 }
3258 }
3259 qemu_opt_set(opts, "host", host);
3260 qemu_opt_set(opts, "port", port);
3261 if (p[pos] == '@') {
3262 p += pos + 1;
3263 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3264 host[0] = 0;
3265 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3266 goto fail;
3267 }
3268 }
3269 qemu_opt_set(opts, "localaddr", host);
3270 qemu_opt_set(opts, "localport", port);
3271 }
3272 return opts;
3273 }
3274 if (strstart(filename, "unix:", &p)) {
3275 qemu_opt_set(opts, "backend", "socket");
3276 if (qemu_opts_do_parse(opts, p, "path") != 0)
3277 goto fail;
3278 return opts;
3279 }
3280 if (strstart(filename, "/dev/parport", NULL) ||
3281 strstart(filename, "/dev/ppi", NULL)) {
3282 qemu_opt_set(opts, "backend", "parport");
3283 qemu_opt_set(opts, "path", filename);
3284 return opts;
3285 }
3286 if (strstart(filename, "/dev/", NULL)) {
3287 qemu_opt_set(opts, "backend", "tty");
3288 qemu_opt_set(opts, "path", filename);
3289 return opts;
3290 }
3291
3292 fail:
3293 qemu_opts_del(opts);
3294 return NULL;
3295 }
3296
3297 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3298 Error **errp)
3299 {
3300 const char *path = qemu_opt_get(opts, "path");
3301
3302 if (path == NULL) {
3303 error_setg(errp, "chardev: file: no filename given");
3304 return;
3305 }
3306 backend->file = g_new0(ChardevFile, 1);
3307 backend->file->out = g_strdup(path);
3308 }
3309
3310 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3311 Error **errp)
3312 {
3313 backend->stdio = g_new0(ChardevStdio, 1);
3314 backend->stdio->has_signal = true;
3315 backend->stdio->signal = qemu_opt_get_bool(opts, "signal", true);
3316 }
3317
3318 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3319 Error **errp)
3320 {
3321 const char *device = qemu_opt_get(opts, "path");
3322
3323 if (device == NULL) {
3324 error_setg(errp, "chardev: serial/tty: no device path given");
3325 return;
3326 }
3327 backend->serial = g_new0(ChardevHostdev, 1);
3328 backend->serial->device = g_strdup(device);
3329 }
3330
3331 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3332 Error **errp)
3333 {
3334 const char *device = qemu_opt_get(opts, "path");
3335
3336 if (device == NULL) {
3337 error_setg(errp, "chardev: parallel: no device path given");
3338 return;
3339 }
3340 backend->parallel = g_new0(ChardevHostdev, 1);
3341 backend->parallel->device = g_strdup(device);
3342 }
3343
3344 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3345 Error **errp)
3346 {
3347 const char *device = qemu_opt_get(opts, "path");
3348
3349 if (device == NULL) {
3350 error_setg(errp, "chardev: pipe: no device path given");
3351 return;
3352 }
3353 backend->pipe = g_new0(ChardevHostdev, 1);
3354 backend->pipe->device = g_strdup(device);
3355 }
3356
3357 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3358 Error **errp)
3359 {
3360 int val;
3361
3362 backend->ringbuf = g_new0(ChardevRingbuf, 1);
3363
3364 val = qemu_opt_get_size(opts, "size", 0);
3365 if (val != 0) {
3366 backend->ringbuf->has_size = true;
3367 backend->ringbuf->size = val;
3368 }
3369 }
3370
3371 static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
3372 Error **errp)
3373 {
3374 const char *chardev = qemu_opt_get(opts, "chardev");
3375
3376 if (chardev == NULL) {
3377 error_setg(errp, "chardev: mux: no chardev given");
3378 return;
3379 }
3380 backend->mux = g_new0(ChardevMux, 1);
3381 backend->mux->chardev = g_strdup(chardev);
3382 }
3383
3384 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
3385 Error **errp)
3386 {
3387 bool is_listen = qemu_opt_get_bool(opts, "server", false);
3388 bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true);
3389 bool is_telnet = qemu_opt_get_bool(opts, "telnet", false);
3390 bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true);
3391 const char *path = qemu_opt_get(opts, "path");
3392 const char *host = qemu_opt_get(opts, "host");
3393 const char *port = qemu_opt_get(opts, "port");
3394 SocketAddress *addr;
3395
3396 if (!path) {
3397 if (!host) {
3398 error_setg(errp, "chardev: socket: no host given");
3399 return;
3400 }
3401 if (!port) {
3402 error_setg(errp, "chardev: socket: no port given");
3403 return;
3404 }
3405 }
3406
3407 backend->socket = g_new0(ChardevSocket, 1);
3408
3409 backend->socket->has_nodelay = true;
3410 backend->socket->nodelay = do_nodelay;
3411 backend->socket->has_server = true;
3412 backend->socket->server = is_listen;
3413 backend->socket->has_telnet = true;
3414 backend->socket->telnet = is_telnet;
3415 backend->socket->has_wait = true;
3416 backend->socket->wait = is_waitconnect;
3417
3418 addr = g_new0(SocketAddress, 1);
3419 if (path) {
3420 addr->kind = SOCKET_ADDRESS_KIND_UNIX;
3421 addr->q_unix = g_new0(UnixSocketAddress, 1);
3422 addr->q_unix->path = g_strdup(path);
3423 } else {
3424 addr->kind = SOCKET_ADDRESS_KIND_INET;
3425 addr->inet = g_new0(InetSocketAddress, 1);
3426 addr->inet->host = g_strdup(host);
3427 addr->inet->port = g_strdup(port);
3428 addr->inet->has_to = qemu_opt_get(opts, "to");
3429 addr->inet->to = qemu_opt_get_number(opts, "to", 0);
3430 addr->inet->has_ipv4 = qemu_opt_get(opts, "ipv4");
3431 addr->inet->ipv4 = qemu_opt_get_bool(opts, "ipv4", 0);
3432 addr->inet->has_ipv6 = qemu_opt_get(opts, "ipv6");
3433 addr->inet->ipv6 = qemu_opt_get_bool(opts, "ipv6", 0);
3434 }
3435 backend->socket->addr = addr;
3436 }
3437
3438 static void qemu_chr_parse_udp(QemuOpts *opts, ChardevBackend *backend,
3439 Error **errp)
3440 {
3441 const char *host = qemu_opt_get(opts, "host");
3442 const char *port = qemu_opt_get(opts, "port");
3443 const char *localaddr = qemu_opt_get(opts, "localaddr");
3444 const char *localport = qemu_opt_get(opts, "localport");
3445 bool has_local = false;
3446 SocketAddress *addr;
3447
3448 if (host == NULL || strlen(host) == 0) {
3449 host = "localhost";
3450 }
3451 if (port == NULL || strlen(port) == 0) {
3452 error_setg(errp, "chardev: udp: remote port not specified");
3453 return;
3454 }
3455 if (localport == NULL || strlen(localport) == 0) {
3456 localport = "0";
3457 } else {
3458 has_local = true;
3459 }
3460 if (localaddr == NULL || strlen(localaddr) == 0) {
3461 localaddr = "";
3462 } else {
3463 has_local = true;
3464 }
3465
3466 backend->udp = g_new0(ChardevUdp, 1);
3467
3468 addr = g_new0(SocketAddress, 1);
3469 addr->kind = SOCKET_ADDRESS_KIND_INET;
3470 addr->inet = g_new0(InetSocketAddress, 1);
3471 addr->inet->host = g_strdup(host);
3472 addr->inet->port = g_strdup(port);
3473 addr->inet->has_ipv4 = qemu_opt_get(opts, "ipv4");
3474 addr->inet->ipv4 = qemu_opt_get_bool(opts, "ipv4", 0);
3475 addr->inet->has_ipv6 = qemu_opt_get(opts, "ipv6");
3476 addr->inet->ipv6 = qemu_opt_get_bool(opts, "ipv6", 0);
3477 backend->udp->remote = addr;
3478
3479 if (has_local) {
3480 backend->udp->has_local = true;
3481 addr = g_new0(SocketAddress, 1);
3482 addr->kind = SOCKET_ADDRESS_KIND_INET;
3483 addr->inet = g_new0(InetSocketAddress, 1);
3484 addr->inet->host = g_strdup(localaddr);
3485 addr->inet->port = g_strdup(localport);
3486 backend->udp->local = addr;
3487 }
3488 }
3489
3490 typedef struct CharDriver {
3491 const char *name;
3492 ChardevBackendKind kind;
3493 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3494 } CharDriver;
3495
3496 static GSList *backends;
3497
3498 void register_char_driver(const char *name, ChardevBackendKind kind,
3499 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp))
3500 {
3501 CharDriver *s;
3502
3503 s = g_malloc0(sizeof(*s));
3504 s->name = g_strdup(name);
3505 s->kind = kind;
3506 s->parse = parse;
3507
3508 backends = g_slist_append(backends, s);
3509 }
3510
3511 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3512 void (*init)(struct CharDriverState *s),
3513 Error **errp)
3514 {
3515 Error *local_err = NULL;
3516 CharDriver *cd;
3517 CharDriverState *chr;
3518 GSList *i;
3519 ChardevReturn *ret = NULL;
3520 ChardevBackend *backend;
3521 const char *id = qemu_opts_id(opts);
3522 char *bid = NULL;
3523
3524 if (id == NULL) {
3525 error_setg(errp, "chardev: no id specified");
3526 goto err;
3527 }
3528
3529 if (qemu_opt_get(opts, "backend") == NULL) {
3530 error_setg(errp, "chardev: \"%s\" missing backend",
3531 qemu_opts_id(opts));
3532 goto err;
3533 }
3534 for (i = backends; i; i = i->next) {
3535 cd = i->data;
3536
3537 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3538 break;
3539 }
3540 }
3541 if (i == NULL) {
3542 error_setg(errp, "chardev: backend \"%s\" not found",
3543 qemu_opt_get(opts, "backend"));
3544 goto err;
3545 }
3546
3547 backend = g_new0(ChardevBackend, 1);
3548
3549 if (qemu_opt_get_bool(opts, "mux", 0)) {
3550 bid = g_strdup_printf("%s-base", id);
3551 }
3552
3553 chr = NULL;
3554 backend->kind = cd->kind;
3555 if (cd->parse) {
3556 cd->parse(opts, backend, &local_err);
3557 if (local_err) {
3558 error_propagate(errp, local_err);
3559 goto qapi_out;
3560 }
3561 }
3562 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3563 if (!ret) {
3564 goto qapi_out;
3565 }
3566
3567 if (bid) {
3568 qapi_free_ChardevBackend(backend);
3569 qapi_free_ChardevReturn(ret);
3570 backend = g_new0(ChardevBackend, 1);
3571 backend->mux = g_new0(ChardevMux, 1);
3572 backend->kind = CHARDEV_BACKEND_KIND_MUX;
3573 backend->mux->chardev = g_strdup(bid);
3574 ret = qmp_chardev_add(id, backend, errp);
3575 if (!ret) {
3576 chr = qemu_chr_find(bid);
3577 qemu_chr_delete(chr);
3578 chr = NULL;
3579 goto qapi_out;
3580 }
3581 }
3582
3583 chr = qemu_chr_find(id);
3584 chr->opts = opts;
3585
3586 qapi_out:
3587 qapi_free_ChardevBackend(backend);
3588 qapi_free_ChardevReturn(ret);
3589 g_free(bid);
3590 return chr;
3591
3592 err:
3593 qemu_opts_del(opts);
3594 return NULL;
3595 }
3596
3597 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3598 {
3599 const char *p;
3600 CharDriverState *chr;
3601 QemuOpts *opts;
3602 Error *err = NULL;
3603
3604 if (strstart(filename, "chardev:", &p)) {
3605 return qemu_chr_find(p);
3606 }
3607
3608 opts = qemu_chr_parse_compat(label, filename);
3609 if (!opts)
3610 return NULL;
3611
3612 chr = qemu_chr_new_from_opts(opts, init, &err);
3613 if (err) {
3614 error_report("%s", error_get_pretty(err));
3615 error_free(err);
3616 }
3617 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3618 qemu_chr_fe_claim_no_fail(chr);
3619 monitor_init(chr, MONITOR_USE_READLINE);
3620 }
3621 return chr;
3622 }
3623
3624 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3625 {
3626 if (chr->chr_set_echo) {
3627 chr->chr_set_echo(chr, echo);
3628 }
3629 }
3630
3631 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
3632 {
3633 if (chr->fe_open == fe_open) {
3634 return;
3635 }
3636 chr->fe_open = fe_open;
3637 if (chr->chr_set_fe_open) {
3638 chr->chr_set_fe_open(chr, fe_open);
3639 }
3640 }
3641
3642 void qemu_chr_fe_event(struct CharDriverState *chr, int event)
3643 {
3644 if (chr->chr_fe_event) {
3645 chr->chr_fe_event(chr, event);
3646 }
3647 }
3648
3649 int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3650 GIOFunc func, void *user_data)
3651 {
3652 GSource *src;
3653 guint tag;
3654
3655 if (s->chr_add_watch == NULL) {
3656 return -ENOSYS;
3657 }
3658
3659 src = s->chr_add_watch(s, cond);
3660 if (!src) {
3661 return -EINVAL;
3662 }
3663
3664 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3665 tag = g_source_attach(src, NULL);
3666 g_source_unref(src);
3667
3668 return tag;
3669 }
3670
3671 int qemu_chr_fe_claim(CharDriverState *s)
3672 {
3673 if (s->avail_connections < 1) {
3674 return -1;
3675 }
3676 s->avail_connections--;
3677 return 0;
3678 }
3679
3680 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
3681 {
3682 if (qemu_chr_fe_claim(s) != 0) {
3683 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
3684 __func__, s->label);
3685 exit(1);
3686 }
3687 }
3688
3689 void qemu_chr_fe_release(CharDriverState *s)
3690 {
3691 s->avail_connections++;
3692 }
3693
3694 void qemu_chr_delete(CharDriverState *chr)
3695 {
3696 QTAILQ_REMOVE(&chardevs, chr, next);
3697 if (chr->chr_close) {
3698 chr->chr_close(chr);
3699 }
3700 g_free(chr->filename);
3701 g_free(chr->label);
3702 if (chr->opts) {
3703 qemu_opts_del(chr->opts);
3704 }
3705 g_free(chr);
3706 }
3707
3708 ChardevInfoList *qmp_query_chardev(Error **errp)
3709 {
3710 ChardevInfoList *chr_list = NULL;
3711 CharDriverState *chr;
3712
3713 QTAILQ_FOREACH(chr, &chardevs, next) {
3714 ChardevInfoList *info = g_malloc0(sizeof(*info));
3715 info->value = g_malloc0(sizeof(*info->value));
3716 info->value->label = g_strdup(chr->label);
3717 info->value->filename = g_strdup(chr->filename);
3718 info->value->frontend_open = chr->fe_open;
3719
3720 info->next = chr_list;
3721 chr_list = info;
3722 }
3723
3724 return chr_list;
3725 }
3726
3727 ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp)
3728 {
3729 ChardevBackendInfoList *backend_list = NULL;
3730 CharDriver *c = NULL;
3731 GSList *i = NULL;
3732
3733 for (i = backends; i; i = i->next) {
3734 ChardevBackendInfoList *info = g_malloc0(sizeof(*info));
3735 c = i->data;
3736 info->value = g_malloc0(sizeof(*info->value));
3737 info->value->name = g_strdup(c->name);
3738
3739 info->next = backend_list;
3740 backend_list = info;
3741 }
3742
3743 return backend_list;
3744 }
3745
3746 CharDriverState *qemu_chr_find(const char *name)
3747 {
3748 CharDriverState *chr;
3749
3750 QTAILQ_FOREACH(chr, &chardevs, next) {
3751 if (strcmp(chr->label, name) != 0)
3752 continue;
3753 return chr;
3754 }
3755 return NULL;
3756 }
3757
3758 /* Get a character (serial) device interface. */
3759 CharDriverState *qemu_char_get_next_serial(void)
3760 {
3761 static int next_serial;
3762 CharDriverState *chr;
3763
3764 /* FIXME: This function needs to go away: use chardev properties! */
3765
3766 while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
3767 chr = serial_hds[next_serial++];
3768 qemu_chr_fe_claim_no_fail(chr);
3769 return chr;
3770 }
3771 return NULL;
3772 }
3773
3774 QemuOptsList qemu_chardev_opts = {
3775 .name = "chardev",
3776 .implied_opt_name = "backend",
3777 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3778 .desc = {
3779 {
3780 .name = "backend",
3781 .type = QEMU_OPT_STRING,
3782 },{
3783 .name = "path",
3784 .type = QEMU_OPT_STRING,
3785 },{
3786 .name = "host",
3787 .type = QEMU_OPT_STRING,
3788 },{
3789 .name = "port",
3790 .type = QEMU_OPT_STRING,
3791 },{
3792 .name = "localaddr",
3793 .type = QEMU_OPT_STRING,
3794 },{
3795 .name = "localport",
3796 .type = QEMU_OPT_STRING,
3797 },{
3798 .name = "to",
3799 .type = QEMU_OPT_NUMBER,
3800 },{
3801 .name = "ipv4",
3802 .type = QEMU_OPT_BOOL,
3803 },{
3804 .name = "ipv6",
3805 .type = QEMU_OPT_BOOL,
3806 },{
3807 .name = "wait",
3808 .type = QEMU_OPT_BOOL,
3809 },{
3810 .name = "server",
3811 .type = QEMU_OPT_BOOL,
3812 },{
3813 .name = "delay",
3814 .type = QEMU_OPT_BOOL,
3815 },{
3816 .name = "telnet",
3817 .type = QEMU_OPT_BOOL,
3818 },{
3819 .name = "width",
3820 .type = QEMU_OPT_NUMBER,
3821 },{
3822 .name = "height",
3823 .type = QEMU_OPT_NUMBER,
3824 },{
3825 .name = "cols",
3826 .type = QEMU_OPT_NUMBER,
3827 },{
3828 .name = "rows",
3829 .type = QEMU_OPT_NUMBER,
3830 },{
3831 .name = "mux",
3832 .type = QEMU_OPT_BOOL,
3833 },{
3834 .name = "signal",
3835 .type = QEMU_OPT_BOOL,
3836 },{
3837 .name = "name",
3838 .type = QEMU_OPT_STRING,
3839 },{
3840 .name = "debug",
3841 .type = QEMU_OPT_NUMBER,
3842 },{
3843 .name = "size",
3844 .type = QEMU_OPT_SIZE,
3845 },{
3846 .name = "chardev",
3847 .type = QEMU_OPT_STRING,
3848 },
3849 { /* end of list */ }
3850 },
3851 };
3852
3853 #ifdef _WIN32
3854
3855 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3856 {
3857 HANDLE out;
3858
3859 if (file->has_in) {
3860 error_setg(errp, "input file not supported");
3861 return NULL;
3862 }
3863
3864 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
3865 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
3866 if (out == INVALID_HANDLE_VALUE) {
3867 error_setg(errp, "open %s failed", file->out);
3868 return NULL;
3869 }
3870 return qemu_chr_open_win_file(out);
3871 }
3872
3873 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3874 Error **errp)
3875 {
3876 return qemu_chr_open_win_path(serial->device);
3877 }
3878
3879 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3880 Error **errp)
3881 {
3882 error_setg(errp, "character device backend type 'parallel' not supported");
3883 return NULL;
3884 }
3885
3886 #else /* WIN32 */
3887
3888 static int qmp_chardev_open_file_source(char *src, int flags,
3889 Error **errp)
3890 {
3891 int fd = -1;
3892
3893 TFR(fd = qemu_open(src, flags, 0666));
3894 if (fd == -1) {
3895 error_setg_file_open(errp, errno, src);
3896 }
3897 return fd;
3898 }
3899
3900 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3901 {
3902 int flags, in = -1, out;
3903
3904 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
3905 out = qmp_chardev_open_file_source(file->out, flags, errp);
3906 if (out < 0) {
3907 return NULL;
3908 }
3909
3910 if (file->has_in) {
3911 flags = O_RDONLY;
3912 in = qmp_chardev_open_file_source(file->in, flags, errp);
3913 if (in < 0) {
3914 qemu_close(out);
3915 return NULL;
3916 }
3917 }
3918
3919 return qemu_chr_open_fd(in, out);
3920 }
3921
3922 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3923 Error **errp)
3924 {
3925 #ifdef HAVE_CHARDEV_TTY
3926 int fd;
3927
3928 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
3929 if (fd < 0) {
3930 return NULL;
3931 }
3932 qemu_set_nonblock(fd);
3933 return qemu_chr_open_tty_fd(fd);
3934 #else
3935 error_setg(errp, "character device backend type 'serial' not supported");
3936 return NULL;
3937 #endif
3938 }
3939
3940 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3941 Error **errp)
3942 {
3943 #ifdef HAVE_CHARDEV_PARPORT
3944 int fd;
3945
3946 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
3947 if (fd < 0) {
3948 return NULL;
3949 }
3950 return qemu_chr_open_pp_fd(fd);
3951 #else
3952 error_setg(errp, "character device backend type 'parallel' not supported");
3953 return NULL;
3954 #endif
3955 }
3956
3957 #endif /* WIN32 */
3958
3959 static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
3960 Error **errp)
3961 {
3962 SocketAddress *addr = sock->addr;
3963 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
3964 bool is_listen = sock->has_server ? sock->server : true;
3965 bool is_telnet = sock->has_telnet ? sock->telnet : false;
3966 bool is_waitconnect = sock->has_wait ? sock->wait : false;
3967 int fd;
3968
3969 if (is_listen) {
3970 fd = socket_listen(addr, errp);
3971 } else {
3972 fd = socket_connect(addr, errp, NULL, NULL);
3973 }
3974 if (fd < 0) {
3975 return NULL;
3976 }
3977 return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
3978 is_telnet, is_waitconnect, errp);
3979 }
3980
3981 static CharDriverState *qmp_chardev_open_udp(ChardevUdp *udp,
3982 Error **errp)
3983 {
3984 int fd;
3985
3986 fd = socket_dgram(udp->remote, udp->local, errp);
3987 if (fd < 0) {
3988 return NULL;
3989 }
3990 return qemu_chr_open_udp_fd(fd);
3991 }
3992
3993 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
3994 Error **errp)
3995 {
3996 ChardevReturn *ret = g_new0(ChardevReturn, 1);
3997 CharDriverState *base, *chr = NULL;
3998
3999 chr = qemu_chr_find(id);
4000 if (chr) {
4001 error_setg(errp, "Chardev '%s' already exists", id);
4002 g_free(ret);
4003 return NULL;
4004 }
4005
4006 switch (backend->kind) {
4007 case CHARDEV_BACKEND_KIND_FILE:
4008 chr = qmp_chardev_open_file(backend->file, errp);
4009 break;
4010 case CHARDEV_BACKEND_KIND_SERIAL:
4011 chr = qmp_chardev_open_serial(backend->serial, errp);
4012 break;
4013 case CHARDEV_BACKEND_KIND_PARALLEL:
4014 chr = qmp_chardev_open_parallel(backend->parallel, errp);
4015 break;
4016 case CHARDEV_BACKEND_KIND_PIPE:
4017 chr = qemu_chr_open_pipe(backend->pipe);
4018 break;
4019 case CHARDEV_BACKEND_KIND_SOCKET:
4020 chr = qmp_chardev_open_socket(backend->socket, errp);
4021 break;
4022 case CHARDEV_BACKEND_KIND_UDP:
4023 chr = qmp_chardev_open_udp(backend->udp, errp);
4024 break;
4025 #ifdef HAVE_CHARDEV_TTY
4026 case CHARDEV_BACKEND_KIND_PTY:
4027 chr = qemu_chr_open_pty(id, ret);
4028 break;
4029 #endif
4030 case CHARDEV_BACKEND_KIND_NULL:
4031 chr = qemu_chr_open_null();
4032 break;
4033 case CHARDEV_BACKEND_KIND_MUX:
4034 base = qemu_chr_find(backend->mux->chardev);
4035 if (base == NULL) {
4036 error_setg(errp, "mux: base chardev %s not found",
4037 backend->mux->chardev);
4038 break;
4039 }
4040 chr = qemu_chr_open_mux(base);
4041 break;
4042 case CHARDEV_BACKEND_KIND_MSMOUSE:
4043 chr = qemu_chr_open_msmouse();
4044 break;
4045 #ifdef CONFIG_BRLAPI
4046 case CHARDEV_BACKEND_KIND_BRAILLE:
4047 chr = chr_baum_init();
4048 break;
4049 #endif
4050 case CHARDEV_BACKEND_KIND_TESTDEV:
4051 chr = chr_testdev_init();
4052 break;
4053 case CHARDEV_BACKEND_KIND_STDIO:
4054 chr = qemu_chr_open_stdio(backend->stdio);
4055 break;
4056 #ifdef _WIN32
4057 case CHARDEV_BACKEND_KIND_CONSOLE:
4058 chr = qemu_chr_open_win_con();
4059 break;
4060 #endif
4061 #ifdef CONFIG_SPICE
4062 case CHARDEV_BACKEND_KIND_SPICEVMC:
4063 chr = qemu_chr_open_spice_vmc(backend->spicevmc->type);
4064 break;
4065 case CHARDEV_BACKEND_KIND_SPICEPORT:
4066 chr = qemu_chr_open_spice_port(backend->spiceport->fqdn);
4067 break;
4068 #endif
4069 case CHARDEV_BACKEND_KIND_VC:
4070 chr = vc_init(backend->vc);
4071 break;
4072 case CHARDEV_BACKEND_KIND_RINGBUF:
4073 case CHARDEV_BACKEND_KIND_MEMORY:
4074 chr = qemu_chr_open_ringbuf(backend->ringbuf, errp);
4075 break;
4076 default:
4077 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
4078 break;
4079 }
4080
4081 /*
4082 * Character backend open hasn't been fully converted to the Error
4083 * API. Some opens fail without setting an error. Set a generic
4084 * error then.
4085 * TODO full conversion to Error API
4086 */
4087 if (chr == NULL && errp && !*errp) {
4088 error_setg(errp, "Failed to create chardev");
4089 }
4090 if (chr) {
4091 chr->label = g_strdup(id);
4092 chr->avail_connections =
4093 (backend->kind == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
4094 if (!chr->filename) {
4095 chr->filename = g_strdup(ChardevBackendKind_lookup[backend->kind]);
4096 }
4097 if (!chr->explicit_be_open) {
4098 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
4099 }
4100 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
4101 return ret;
4102 } else {
4103 g_free(ret);
4104 return NULL;
4105 }
4106 }
4107
4108 void qmp_chardev_remove(const char *id, Error **errp)
4109 {
4110 CharDriverState *chr;
4111
4112 chr = qemu_chr_find(id);
4113 if (chr == NULL) {
4114 error_setg(errp, "Chardev '%s' not found", id);
4115 return;
4116 }
4117 if (chr->chr_can_read || chr->chr_read ||
4118 chr->chr_event || chr->handler_opaque) {
4119 error_setg(errp, "Chardev '%s' is busy", id);
4120 return;
4121 }
4122 qemu_chr_delete(chr);
4123 }
4124
4125 static void register_types(void)
4126 {
4127 register_char_driver("null", CHARDEV_BACKEND_KIND_NULL, NULL);
4128 register_char_driver("socket", CHARDEV_BACKEND_KIND_SOCKET,
4129 qemu_chr_parse_socket);
4130 register_char_driver("udp", CHARDEV_BACKEND_KIND_UDP, qemu_chr_parse_udp);
4131 register_char_driver("ringbuf", CHARDEV_BACKEND_KIND_RINGBUF,
4132 qemu_chr_parse_ringbuf);
4133 register_char_driver("file", CHARDEV_BACKEND_KIND_FILE,
4134 qemu_chr_parse_file_out);
4135 register_char_driver("stdio", CHARDEV_BACKEND_KIND_STDIO,
4136 qemu_chr_parse_stdio);
4137 register_char_driver("serial", CHARDEV_BACKEND_KIND_SERIAL,
4138 qemu_chr_parse_serial);
4139 register_char_driver("tty", CHARDEV_BACKEND_KIND_SERIAL,
4140 qemu_chr_parse_serial);
4141 register_char_driver("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
4142 qemu_chr_parse_parallel);
4143 register_char_driver("parport", CHARDEV_BACKEND_KIND_PARALLEL,
4144 qemu_chr_parse_parallel);
4145 register_char_driver("pty", CHARDEV_BACKEND_KIND_PTY, NULL);
4146 register_char_driver("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL);
4147 register_char_driver("pipe", CHARDEV_BACKEND_KIND_PIPE,
4148 qemu_chr_parse_pipe);
4149 register_char_driver("mux", CHARDEV_BACKEND_KIND_MUX, qemu_chr_parse_mux);
4150 /* Bug-compatibility: */
4151 register_char_driver("memory", CHARDEV_BACKEND_KIND_MEMORY,
4152 qemu_chr_parse_ringbuf);
4153 /* this must be done after machine init, since we register FEs with muxes
4154 * as part of realize functions like serial_isa_realizefn when -nographic
4155 * is specified
4156 */
4157 qemu_add_machine_init_done_notifier(&muxes_realize_notify);
4158 }
4159
4160 type_init(register_types);
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