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trace: install simpletrace SystemTap tapset
[qemu.git] / qemu-char.c
blob6964a2d9fda9c160b6c78f46c112a804423beba7
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 fcntl(fd_out, F_SETFL, O_NONBLOCK);
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 fcntl(0, F_SETFL, O_NONBLOCK);
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 return 0;
1164 }
1165 return io_channel_send(s->fd, buf, len);
1166 }
1167
1168 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1169 {
1170 PtyCharDriver *s = chr->opaque;
1171 if (!s->connected) {
1172 return NULL;
1173 }
1174 return g_io_create_watch(s->fd, cond);
1175 }
1176
1177 static int pty_chr_read_poll(void *opaque)
1178 {
1179 CharDriverState *chr = opaque;
1180 PtyCharDriver *s = chr->opaque;
1181
1182 s->read_bytes = qemu_chr_be_can_write(chr);
1183 return s->read_bytes;
1184 }
1185
1186 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1187 {
1188 CharDriverState *chr = opaque;
1189 PtyCharDriver *s = chr->opaque;
1190 gsize size, len;
1191 uint8_t buf[READ_BUF_LEN];
1192 GIOStatus status;
1193
1194 len = sizeof(buf);
1195 if (len > s->read_bytes)
1196 len = s->read_bytes;
1197 if (len == 0) {
1198 return TRUE;
1199 }
1200 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1201 if (status != G_IO_STATUS_NORMAL) {
1202 pty_chr_state(chr, 0);
1203 return FALSE;
1204 } else {
1205 pty_chr_state(chr, 1);
1206 qemu_chr_be_write(chr, buf, size);
1207 }
1208 return TRUE;
1209 }
1210
1211 static gboolean qemu_chr_be_generic_open_func(gpointer opaque)
1212 {
1213 CharDriverState *chr = opaque;
1214 PtyCharDriver *s = chr->opaque;
1215
1216 s->open_tag = 0;
1217 qemu_chr_be_generic_open(chr);
1218 return FALSE;
1219 }
1220
1221 /* Called with chr_write_lock held. */
1222 static void pty_chr_state(CharDriverState *chr, int connected)
1223 {
1224 PtyCharDriver *s = chr->opaque;
1225
1226 if (!connected) {
1227 if (s->open_tag) {
1228 g_source_remove(s->open_tag);
1229 s->open_tag = 0;
1230 }
1231 remove_fd_in_watch(chr);
1232 s->connected = 0;
1233 /* (re-)connect poll interval for idle guests: once per second.
1234 * We check more frequently in case the guests sends data to
1235 * the virtual device linked to our pty. */
1236 pty_chr_rearm_timer(chr, 1000);
1237 } else {
1238 if (s->timer_tag) {
1239 g_source_remove(s->timer_tag);
1240 s->timer_tag = 0;
1241 }
1242 if (!s->connected) {
1243 g_assert(s->open_tag == 0);
1244 s->connected = 1;
1245 s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, chr);
1246 }
1247 if (!chr->fd_in_tag) {
1248 chr->fd_in_tag = io_add_watch_poll(s->fd, pty_chr_read_poll,
1249 pty_chr_read, chr);
1250 }
1251 }
1252 }
1253
1254 static void pty_chr_close(struct CharDriverState *chr)
1255 {
1256 PtyCharDriver *s = chr->opaque;
1257 int fd;
1258
1259 qemu_mutex_lock(&chr->chr_write_lock);
1260 pty_chr_state(chr, 0);
1261 fd = g_io_channel_unix_get_fd(s->fd);
1262 g_io_channel_unref(s->fd);
1263 close(fd);
1264 if (s->timer_tag) {
1265 g_source_remove(s->timer_tag);
1266 s->timer_tag = 0;
1267 }
1268 qemu_mutex_unlock(&chr->chr_write_lock);
1269 g_free(s);
1270 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1271 }
1272
1273 static CharDriverState *qemu_chr_open_pty(const char *id,
1274 ChardevReturn *ret)
1275 {
1276 CharDriverState *chr;
1277 PtyCharDriver *s;
1278 int master_fd, slave_fd;
1279 char pty_name[PATH_MAX];
1280
1281 master_fd = qemu_openpty_raw(&slave_fd, pty_name);
1282 if (master_fd < 0) {
1283 return NULL;
1284 }
1285
1286 close(slave_fd);
1287
1288 chr = qemu_chr_alloc();
1289
1290 chr->filename = g_strdup_printf("pty:%s", pty_name);
1291 ret->pty = g_strdup(pty_name);
1292 ret->has_pty = true;
1293
1294 fprintf(stderr, "char device redirected to %s (label %s)\n",
1295 pty_name, id);
1296
1297 s = g_malloc0(sizeof(PtyCharDriver));
1298 chr->opaque = s;
1299 chr->chr_write = pty_chr_write;
1300 chr->chr_update_read_handler = pty_chr_update_read_handler;
1301 chr->chr_close = pty_chr_close;
1302 chr->chr_add_watch = pty_chr_add_watch;
1303 chr->explicit_be_open = true;
1304
1305 s->fd = io_channel_from_fd(master_fd);
1306 s->timer_tag = 0;
1307
1308 return chr;
1309 }
1310
1311 static void tty_serial_init(int fd, int speed,
1312 int parity, int data_bits, int stop_bits)
1313 {
1314 struct termios tty;
1315 speed_t spd;
1316
1317 #if 0
1318 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1319 speed, parity, data_bits, stop_bits);
1320 #endif
1321 tcgetattr (fd, &tty);
1322
1323 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1324 speed = speed * 10 / 11;
1325 do {
1326 check_speed(50);
1327 check_speed(75);
1328 check_speed(110);
1329 check_speed(134);
1330 check_speed(150);
1331 check_speed(200);
1332 check_speed(300);
1333 check_speed(600);
1334 check_speed(1200);
1335 check_speed(1800);
1336 check_speed(2400);
1337 check_speed(4800);
1338 check_speed(9600);
1339 check_speed(19200);
1340 check_speed(38400);
1341 /* Non-Posix values follow. They may be unsupported on some systems. */
1342 check_speed(57600);
1343 check_speed(115200);
1344 #ifdef B230400
1345 check_speed(230400);
1346 #endif
1347 #ifdef B460800
1348 check_speed(460800);
1349 #endif
1350 #ifdef B500000
1351 check_speed(500000);
1352 #endif
1353 #ifdef B576000
1354 check_speed(576000);
1355 #endif
1356 #ifdef B921600
1357 check_speed(921600);
1358 #endif
1359 #ifdef B1000000
1360 check_speed(1000000);
1361 #endif
1362 #ifdef B1152000
1363 check_speed(1152000);
1364 #endif
1365 #ifdef B1500000
1366 check_speed(1500000);
1367 #endif
1368 #ifdef B2000000
1369 check_speed(2000000);
1370 #endif
1371 #ifdef B2500000
1372 check_speed(2500000);
1373 #endif
1374 #ifdef B3000000
1375 check_speed(3000000);
1376 #endif
1377 #ifdef B3500000
1378 check_speed(3500000);
1379 #endif
1380 #ifdef B4000000
1381 check_speed(4000000);
1382 #endif
1383 spd = B115200;
1384 } while (0);
1385
1386 cfsetispeed(&tty, spd);
1387 cfsetospeed(&tty, spd);
1388
1389 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1390 |INLCR|IGNCR|ICRNL|IXON);
1391 tty.c_oflag |= OPOST;
1392 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1393 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1394 switch(data_bits) {
1395 default:
1396 case 8:
1397 tty.c_cflag |= CS8;
1398 break;
1399 case 7:
1400 tty.c_cflag |= CS7;
1401 break;
1402 case 6:
1403 tty.c_cflag |= CS6;
1404 break;
1405 case 5:
1406 tty.c_cflag |= CS5;
1407 break;
1408 }
1409 switch(parity) {
1410 default:
1411 case 'N':
1412 break;
1413 case 'E':
1414 tty.c_cflag |= PARENB;
1415 break;
1416 case 'O':
1417 tty.c_cflag |= PARENB | PARODD;
1418 break;
1419 }
1420 if (stop_bits == 2)
1421 tty.c_cflag |= CSTOPB;
1422
1423 tcsetattr (fd, TCSANOW, &tty);
1424 }
1425
1426 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1427 {
1428 FDCharDriver *s = chr->opaque;
1429
1430 switch(cmd) {
1431 case CHR_IOCTL_SERIAL_SET_PARAMS:
1432 {
1433 QEMUSerialSetParams *ssp = arg;
1434 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1435 ssp->speed, ssp->parity,
1436 ssp->data_bits, ssp->stop_bits);
1437 }
1438 break;
1439 case CHR_IOCTL_SERIAL_SET_BREAK:
1440 {
1441 int enable = *(int *)arg;
1442 if (enable) {
1443 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1444 }
1445 }
1446 break;
1447 case CHR_IOCTL_SERIAL_GET_TIOCM:
1448 {
1449 int sarg = 0;
1450 int *targ = (int *)arg;
1451 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1452 *targ = 0;
1453 if (sarg & TIOCM_CTS)
1454 *targ |= CHR_TIOCM_CTS;
1455 if (sarg & TIOCM_CAR)
1456 *targ |= CHR_TIOCM_CAR;
1457 if (sarg & TIOCM_DSR)
1458 *targ |= CHR_TIOCM_DSR;
1459 if (sarg & TIOCM_RI)
1460 *targ |= CHR_TIOCM_RI;
1461 if (sarg & TIOCM_DTR)
1462 *targ |= CHR_TIOCM_DTR;
1463 if (sarg & TIOCM_RTS)
1464 *targ |= CHR_TIOCM_RTS;
1465 }
1466 break;
1467 case CHR_IOCTL_SERIAL_SET_TIOCM:
1468 {
1469 int sarg = *(int *)arg;
1470 int targ = 0;
1471 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1472 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1473 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1474 if (sarg & CHR_TIOCM_CTS)
1475 targ |= TIOCM_CTS;
1476 if (sarg & CHR_TIOCM_CAR)
1477 targ |= TIOCM_CAR;
1478 if (sarg & CHR_TIOCM_DSR)
1479 targ |= TIOCM_DSR;
1480 if (sarg & CHR_TIOCM_RI)
1481 targ |= TIOCM_RI;
1482 if (sarg & CHR_TIOCM_DTR)
1483 targ |= TIOCM_DTR;
1484 if (sarg & CHR_TIOCM_RTS)
1485 targ |= TIOCM_RTS;
1486 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1487 }
1488 break;
1489 default:
1490 return -ENOTSUP;
1491 }
1492 return 0;
1493 }
1494
1495 static void qemu_chr_close_tty(CharDriverState *chr)
1496 {
1497 FDCharDriver *s = chr->opaque;
1498 int fd = -1;
1499
1500 if (s) {
1501 fd = g_io_channel_unix_get_fd(s->fd_in);
1502 }
1503
1504 fd_chr_close(chr);
1505
1506 if (fd >= 0) {
1507 close(fd);
1508 }
1509 }
1510
1511 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1512 {
1513 CharDriverState *chr;
1514
1515 tty_serial_init(fd, 115200, 'N', 8, 1);
1516 chr = qemu_chr_open_fd(fd, fd);
1517 chr->chr_ioctl = tty_serial_ioctl;
1518 chr->chr_close = qemu_chr_close_tty;
1519 return chr;
1520 }
1521 #endif /* __linux__ || __sun__ */
1522
1523 #if defined(__linux__)
1524
1525 #define HAVE_CHARDEV_PARPORT 1
1526
1527 typedef struct {
1528 int fd;
1529 int mode;
1530 } ParallelCharDriver;
1531
1532 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1533 {
1534 if (s->mode != mode) {
1535 int m = mode;
1536 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1537 return 0;
1538 s->mode = mode;
1539 }
1540 return 1;
1541 }
1542
1543 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1544 {
1545 ParallelCharDriver *drv = chr->opaque;
1546 int fd = drv->fd;
1547 uint8_t b;
1548
1549 switch(cmd) {
1550 case CHR_IOCTL_PP_READ_DATA:
1551 if (ioctl(fd, PPRDATA, &b) < 0)
1552 return -ENOTSUP;
1553 *(uint8_t *)arg = b;
1554 break;
1555 case CHR_IOCTL_PP_WRITE_DATA:
1556 b = *(uint8_t *)arg;
1557 if (ioctl(fd, PPWDATA, &b) < 0)
1558 return -ENOTSUP;
1559 break;
1560 case CHR_IOCTL_PP_READ_CONTROL:
1561 if (ioctl(fd, PPRCONTROL, &b) < 0)
1562 return -ENOTSUP;
1563 /* Linux gives only the lowest bits, and no way to know data
1564 direction! For better compatibility set the fixed upper
1565 bits. */
1566 *(uint8_t *)arg = b | 0xc0;
1567 break;
1568 case CHR_IOCTL_PP_WRITE_CONTROL:
1569 b = *(uint8_t *)arg;
1570 if (ioctl(fd, PPWCONTROL, &b) < 0)
1571 return -ENOTSUP;
1572 break;
1573 case CHR_IOCTL_PP_READ_STATUS:
1574 if (ioctl(fd, PPRSTATUS, &b) < 0)
1575 return -ENOTSUP;
1576 *(uint8_t *)arg = b;
1577 break;
1578 case CHR_IOCTL_PP_DATA_DIR:
1579 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1580 return -ENOTSUP;
1581 break;
1582 case CHR_IOCTL_PP_EPP_READ_ADDR:
1583 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1584 struct ParallelIOArg *parg = arg;
1585 int n = read(fd, parg->buffer, parg->count);
1586 if (n != parg->count) {
1587 return -EIO;
1588 }
1589 }
1590 break;
1591 case CHR_IOCTL_PP_EPP_READ:
1592 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1593 struct ParallelIOArg *parg = arg;
1594 int n = read(fd, parg->buffer, parg->count);
1595 if (n != parg->count) {
1596 return -EIO;
1597 }
1598 }
1599 break;
1600 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1601 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1602 struct ParallelIOArg *parg = arg;
1603 int n = write(fd, parg->buffer, parg->count);
1604 if (n != parg->count) {
1605 return -EIO;
1606 }
1607 }
1608 break;
1609 case CHR_IOCTL_PP_EPP_WRITE:
1610 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1611 struct ParallelIOArg *parg = arg;
1612 int n = write(fd, parg->buffer, parg->count);
1613 if (n != parg->count) {
1614 return -EIO;
1615 }
1616 }
1617 break;
1618 default:
1619 return -ENOTSUP;
1620 }
1621 return 0;
1622 }
1623
1624 static void pp_close(CharDriverState *chr)
1625 {
1626 ParallelCharDriver *drv = chr->opaque;
1627 int fd = drv->fd;
1628
1629 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1630 ioctl(fd, PPRELEASE);
1631 close(fd);
1632 g_free(drv);
1633 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1634 }
1635
1636 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1637 {
1638 CharDriverState *chr;
1639 ParallelCharDriver *drv;
1640
1641 if (ioctl(fd, PPCLAIM) < 0) {
1642 close(fd);
1643 return NULL;
1644 }
1645
1646 drv = g_malloc0(sizeof(ParallelCharDriver));
1647 drv->fd = fd;
1648 drv->mode = IEEE1284_MODE_COMPAT;
1649
1650 chr = qemu_chr_alloc();
1651 chr->chr_write = null_chr_write;
1652 chr->chr_ioctl = pp_ioctl;
1653 chr->chr_close = pp_close;
1654 chr->opaque = drv;
1655
1656 return chr;
1657 }
1658 #endif /* __linux__ */
1659
1660 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1661
1662 #define HAVE_CHARDEV_PARPORT 1
1663
1664 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1665 {
1666 int fd = (int)(intptr_t)chr->opaque;
1667 uint8_t b;
1668
1669 switch(cmd) {
1670 case CHR_IOCTL_PP_READ_DATA:
1671 if (ioctl(fd, PPIGDATA, &b) < 0)
1672 return -ENOTSUP;
1673 *(uint8_t *)arg = b;
1674 break;
1675 case CHR_IOCTL_PP_WRITE_DATA:
1676 b = *(uint8_t *)arg;
1677 if (ioctl(fd, PPISDATA, &b) < 0)
1678 return -ENOTSUP;
1679 break;
1680 case CHR_IOCTL_PP_READ_CONTROL:
1681 if (ioctl(fd, PPIGCTRL, &b) < 0)
1682 return -ENOTSUP;
1683 *(uint8_t *)arg = b;
1684 break;
1685 case CHR_IOCTL_PP_WRITE_CONTROL:
1686 b = *(uint8_t *)arg;
1687 if (ioctl(fd, PPISCTRL, &b) < 0)
1688 return -ENOTSUP;
1689 break;
1690 case CHR_IOCTL_PP_READ_STATUS:
1691 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1692 return -ENOTSUP;
1693 *(uint8_t *)arg = b;
1694 break;
1695 default:
1696 return -ENOTSUP;
1697 }
1698 return 0;
1699 }
1700
1701 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1702 {
1703 CharDriverState *chr;
1704
1705 chr = qemu_chr_alloc();
1706 chr->opaque = (void *)(intptr_t)fd;
1707 chr->chr_write = null_chr_write;
1708 chr->chr_ioctl = pp_ioctl;
1709 chr->explicit_be_open = true;
1710 return chr;
1711 }
1712 #endif
1713
1714 #else /* _WIN32 */
1715
1716 typedef struct {
1717 int max_size;
1718 HANDLE hcom, hrecv, hsend;
1719 OVERLAPPED orecv;
1720 BOOL fpipe;
1721 DWORD len;
1722
1723 /* Protected by the CharDriverState chr_write_lock. */
1724 OVERLAPPED osend;
1725 } WinCharState;
1726
1727 typedef struct {
1728 HANDLE hStdIn;
1729 HANDLE hInputReadyEvent;
1730 HANDLE hInputDoneEvent;
1731 HANDLE hInputThread;
1732 uint8_t win_stdio_buf;
1733 } WinStdioCharState;
1734
1735 #define NSENDBUF 2048
1736 #define NRECVBUF 2048
1737 #define MAXCONNECT 1
1738 #define NTIMEOUT 5000
1739
1740 static int win_chr_poll(void *opaque);
1741 static int win_chr_pipe_poll(void *opaque);
1742
1743 static void win_chr_close(CharDriverState *chr)
1744 {
1745 WinCharState *s = chr->opaque;
1746
1747 if (s->hsend) {
1748 CloseHandle(s->hsend);
1749 s->hsend = NULL;
1750 }
1751 if (s->hrecv) {
1752 CloseHandle(s->hrecv);
1753 s->hrecv = NULL;
1754 }
1755 if (s->hcom) {
1756 CloseHandle(s->hcom);
1757 s->hcom = NULL;
1758 }
1759 if (s->fpipe)
1760 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1761 else
1762 qemu_del_polling_cb(win_chr_poll, chr);
1763
1764 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1765 }
1766
1767 static int win_chr_init(CharDriverState *chr, const char *filename)
1768 {
1769 WinCharState *s = chr->opaque;
1770 COMMCONFIG comcfg;
1771 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1772 COMSTAT comstat;
1773 DWORD size;
1774 DWORD err;
1775
1776 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1777 if (!s->hsend) {
1778 fprintf(stderr, "Failed CreateEvent\n");
1779 goto fail;
1780 }
1781 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1782 if (!s->hrecv) {
1783 fprintf(stderr, "Failed CreateEvent\n");
1784 goto fail;
1785 }
1786
1787 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1788 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1789 if (s->hcom == INVALID_HANDLE_VALUE) {
1790 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1791 s->hcom = NULL;
1792 goto fail;
1793 }
1794
1795 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1796 fprintf(stderr, "Failed SetupComm\n");
1797 goto fail;
1798 }
1799
1800 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1801 size = sizeof(COMMCONFIG);
1802 GetDefaultCommConfig(filename, &comcfg, &size);
1803 comcfg.dcb.DCBlength = sizeof(DCB);
1804 CommConfigDialog(filename, NULL, &comcfg);
1805
1806 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1807 fprintf(stderr, "Failed SetCommState\n");
1808 goto fail;
1809 }
1810
1811 if (!SetCommMask(s->hcom, EV_ERR)) {
1812 fprintf(stderr, "Failed SetCommMask\n");
1813 goto fail;
1814 }
1815
1816 cto.ReadIntervalTimeout = MAXDWORD;
1817 if (!SetCommTimeouts(s->hcom, &cto)) {
1818 fprintf(stderr, "Failed SetCommTimeouts\n");
1819 goto fail;
1820 }
1821
1822 if (!ClearCommError(s->hcom, &err, &comstat)) {
1823 fprintf(stderr, "Failed ClearCommError\n");
1824 goto fail;
1825 }
1826 qemu_add_polling_cb(win_chr_poll, chr);
1827 return 0;
1828
1829 fail:
1830 win_chr_close(chr);
1831 return -1;
1832 }
1833
1834 /* Called with chr_write_lock held. */
1835 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1836 {
1837 WinCharState *s = chr->opaque;
1838 DWORD len, ret, size, err;
1839
1840 len = len1;
1841 ZeroMemory(&s->osend, sizeof(s->osend));
1842 s->osend.hEvent = s->hsend;
1843 while (len > 0) {
1844 if (s->hsend)
1845 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1846 else
1847 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1848 if (!ret) {
1849 err = GetLastError();
1850 if (err == ERROR_IO_PENDING) {
1851 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1852 if (ret) {
1853 buf += size;
1854 len -= size;
1855 } else {
1856 break;
1857 }
1858 } else {
1859 break;
1860 }
1861 } else {
1862 buf += size;
1863 len -= size;
1864 }
1865 }
1866 return len1 - len;
1867 }
1868
1869 static int win_chr_read_poll(CharDriverState *chr)
1870 {
1871 WinCharState *s = chr->opaque;
1872
1873 s->max_size = qemu_chr_be_can_write(chr);
1874 return s->max_size;
1875 }
1876
1877 static void win_chr_readfile(CharDriverState *chr)
1878 {
1879 WinCharState *s = chr->opaque;
1880 int ret, err;
1881 uint8_t buf[READ_BUF_LEN];
1882 DWORD size;
1883
1884 ZeroMemory(&s->orecv, sizeof(s->orecv));
1885 s->orecv.hEvent = s->hrecv;
1886 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1887 if (!ret) {
1888 err = GetLastError();
1889 if (err == ERROR_IO_PENDING) {
1890 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1891 }
1892 }
1893
1894 if (size > 0) {
1895 qemu_chr_be_write(chr, buf, size);
1896 }
1897 }
1898
1899 static void win_chr_read(CharDriverState *chr)
1900 {
1901 WinCharState *s = chr->opaque;
1902
1903 if (s->len > s->max_size)
1904 s->len = s->max_size;
1905 if (s->len == 0)
1906 return;
1907
1908 win_chr_readfile(chr);
1909 }
1910
1911 static int win_chr_poll(void *opaque)
1912 {
1913 CharDriverState *chr = opaque;
1914 WinCharState *s = chr->opaque;
1915 COMSTAT status;
1916 DWORD comerr;
1917
1918 ClearCommError(s->hcom, &comerr, &status);
1919 if (status.cbInQue > 0) {
1920 s->len = status.cbInQue;
1921 win_chr_read_poll(chr);
1922 win_chr_read(chr);
1923 return 1;
1924 }
1925 return 0;
1926 }
1927
1928 static CharDriverState *qemu_chr_open_win_path(const char *filename)
1929 {
1930 CharDriverState *chr;
1931 WinCharState *s;
1932
1933 chr = qemu_chr_alloc();
1934 s = g_malloc0(sizeof(WinCharState));
1935 chr->opaque = s;
1936 chr->chr_write = win_chr_write;
1937 chr->chr_close = win_chr_close;
1938
1939 if (win_chr_init(chr, filename) < 0) {
1940 g_free(s);
1941 g_free(chr);
1942 return NULL;
1943 }
1944 return chr;
1945 }
1946
1947 static int win_chr_pipe_poll(void *opaque)
1948 {
1949 CharDriverState *chr = opaque;
1950 WinCharState *s = chr->opaque;
1951 DWORD size;
1952
1953 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1954 if (size > 0) {
1955 s->len = size;
1956 win_chr_read_poll(chr);
1957 win_chr_read(chr);
1958 return 1;
1959 }
1960 return 0;
1961 }
1962
1963 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1964 {
1965 WinCharState *s = chr->opaque;
1966 OVERLAPPED ov;
1967 int ret;
1968 DWORD size;
1969 char openname[256];
1970
1971 s->fpipe = TRUE;
1972
1973 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1974 if (!s->hsend) {
1975 fprintf(stderr, "Failed CreateEvent\n");
1976 goto fail;
1977 }
1978 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1979 if (!s->hrecv) {
1980 fprintf(stderr, "Failed CreateEvent\n");
1981 goto fail;
1982 }
1983
1984 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1985 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1986 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1987 PIPE_WAIT,
1988 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1989 if (s->hcom == INVALID_HANDLE_VALUE) {
1990 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1991 s->hcom = NULL;
1992 goto fail;
1993 }
1994
1995 ZeroMemory(&ov, sizeof(ov));
1996 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1997 ret = ConnectNamedPipe(s->hcom, &ov);
1998 if (ret) {
1999 fprintf(stderr, "Failed ConnectNamedPipe\n");
2000 goto fail;
2001 }
2002
2003 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
2004 if (!ret) {
2005 fprintf(stderr, "Failed GetOverlappedResult\n");
2006 if (ov.hEvent) {
2007 CloseHandle(ov.hEvent);
2008 ov.hEvent = NULL;
2009 }
2010 goto fail;
2011 }
2012
2013 if (ov.hEvent) {
2014 CloseHandle(ov.hEvent);
2015 ov.hEvent = NULL;
2016 }
2017 qemu_add_polling_cb(win_chr_pipe_poll, chr);
2018 return 0;
2019
2020 fail:
2021 win_chr_close(chr);
2022 return -1;
2023 }
2024
2025
2026 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
2027 {
2028 const char *filename = opts->device;
2029 CharDriverState *chr;
2030 WinCharState *s;
2031
2032 chr = qemu_chr_alloc();
2033 s = g_malloc0(sizeof(WinCharState));
2034 chr->opaque = s;
2035 chr->chr_write = win_chr_write;
2036 chr->chr_close = win_chr_close;
2037
2038 if (win_chr_pipe_init(chr, filename) < 0) {
2039 g_free(s);
2040 g_free(chr);
2041 return NULL;
2042 }
2043 return chr;
2044 }
2045
2046 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
2047 {
2048 CharDriverState *chr;
2049 WinCharState *s;
2050
2051 chr = qemu_chr_alloc();
2052 s = g_malloc0(sizeof(WinCharState));
2053 s->hcom = fd_out;
2054 chr->opaque = s;
2055 chr->chr_write = win_chr_write;
2056 return chr;
2057 }
2058
2059 static CharDriverState *qemu_chr_open_win_con(void)
2060 {
2061 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
2062 }
2063
2064 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
2065 {
2066 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
2067 DWORD dwSize;
2068 int len1;
2069
2070 len1 = len;
2071
2072 while (len1 > 0) {
2073 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
2074 break;
2075 }
2076 buf += dwSize;
2077 len1 -= dwSize;
2078 }
2079
2080 return len - len1;
2081 }
2082
2083 static void win_stdio_wait_func(void *opaque)
2084 {
2085 CharDriverState *chr = opaque;
2086 WinStdioCharState *stdio = chr->opaque;
2087 INPUT_RECORD buf[4];
2088 int ret;
2089 DWORD dwSize;
2090 int i;
2091
2092 ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize);
2093
2094 if (!ret) {
2095 /* Avoid error storm */
2096 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2097 return;
2098 }
2099
2100 for (i = 0; i < dwSize; i++) {
2101 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2102
2103 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2104 int j;
2105 if (kev->uChar.AsciiChar != 0) {
2106 for (j = 0; j < kev->wRepeatCount; j++) {
2107 if (qemu_chr_be_can_write(chr)) {
2108 uint8_t c = kev->uChar.AsciiChar;
2109 qemu_chr_be_write(chr, &c, 1);
2110 }
2111 }
2112 }
2113 }
2114 }
2115 }
2116
2117 static DWORD WINAPI win_stdio_thread(LPVOID param)
2118 {
2119 CharDriverState *chr = param;
2120 WinStdioCharState *stdio = chr->opaque;
2121 int ret;
2122 DWORD dwSize;
2123
2124 while (1) {
2125
2126 /* Wait for one byte */
2127 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2128
2129 /* Exit in case of error, continue if nothing read */
2130 if (!ret) {
2131 break;
2132 }
2133 if (!dwSize) {
2134 continue;
2135 }
2136
2137 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2138 if (stdio->win_stdio_buf == '\r') {
2139 continue;
2140 }
2141
2142 /* Signal the main thread and wait until the byte was eaten */
2143 if (!SetEvent(stdio->hInputReadyEvent)) {
2144 break;
2145 }
2146 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2147 != WAIT_OBJECT_0) {
2148 break;
2149 }
2150 }
2151
2152 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2153 return 0;
2154 }
2155
2156 static void win_stdio_thread_wait_func(void *opaque)
2157 {
2158 CharDriverState *chr = opaque;
2159 WinStdioCharState *stdio = chr->opaque;
2160
2161 if (qemu_chr_be_can_write(chr)) {
2162 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2163 }
2164
2165 SetEvent(stdio->hInputDoneEvent);
2166 }
2167
2168 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2169 {
2170 WinStdioCharState *stdio = chr->opaque;
2171 DWORD dwMode = 0;
2172
2173 GetConsoleMode(stdio->hStdIn, &dwMode);
2174
2175 if (echo) {
2176 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2177 } else {
2178 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2179 }
2180 }
2181
2182 static void win_stdio_close(CharDriverState *chr)
2183 {
2184 WinStdioCharState *stdio = chr->opaque;
2185
2186 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2187 CloseHandle(stdio->hInputReadyEvent);
2188 }
2189 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2190 CloseHandle(stdio->hInputDoneEvent);
2191 }
2192 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2193 TerminateThread(stdio->hInputThread, 0);
2194 }
2195
2196 g_free(chr->opaque);
2197 g_free(chr);
2198 }
2199
2200 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
2201 {
2202 CharDriverState *chr;
2203 WinStdioCharState *stdio;
2204 DWORD dwMode;
2205 int is_console = 0;
2206
2207 chr = qemu_chr_alloc();
2208 stdio = g_malloc0(sizeof(WinStdioCharState));
2209
2210 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2211 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2212 fprintf(stderr, "cannot open stdio: invalid handle\n");
2213 exit(1);
2214 }
2215
2216 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2217
2218 chr->opaque = stdio;
2219 chr->chr_write = win_stdio_write;
2220 chr->chr_close = win_stdio_close;
2221
2222 if (is_console) {
2223 if (qemu_add_wait_object(stdio->hStdIn,
2224 win_stdio_wait_func, chr)) {
2225 fprintf(stderr, "qemu_add_wait_object: failed\n");
2226 }
2227 } else {
2228 DWORD dwId;
2229
2230 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2231 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2232 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2233 chr, 0, &dwId);
2234
2235 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2236 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2237 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2238 fprintf(stderr, "cannot create stdio thread or event\n");
2239 exit(1);
2240 }
2241 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2242 win_stdio_thread_wait_func, chr)) {
2243 fprintf(stderr, "qemu_add_wait_object: failed\n");
2244 }
2245 }
2246
2247 dwMode |= ENABLE_LINE_INPUT;
2248
2249 if (is_console) {
2250 /* set the terminal in raw mode */
2251 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2252 dwMode |= ENABLE_PROCESSED_INPUT;
2253 }
2254
2255 SetConsoleMode(stdio->hStdIn, dwMode);
2256
2257 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2258 qemu_chr_fe_set_echo(chr, false);
2259
2260 return chr;
2261 }
2262 #endif /* !_WIN32 */
2263
2264
2265 /***********************************************************/
2266 /* UDP Net console */
2267
2268 typedef struct {
2269 int fd;
2270 GIOChannel *chan;
2271 uint8_t buf[READ_BUF_LEN];
2272 int bufcnt;
2273 int bufptr;
2274 int max_size;
2275 } NetCharDriver;
2276
2277 /* Called with chr_write_lock held. */
2278 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2279 {
2280 NetCharDriver *s = chr->opaque;
2281 gsize bytes_written;
2282 GIOStatus status;
2283
2284 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2285 if (status == G_IO_STATUS_EOF) {
2286 return 0;
2287 } else if (status != G_IO_STATUS_NORMAL) {
2288 return -1;
2289 }
2290
2291 return bytes_written;
2292 }
2293
2294 static int udp_chr_read_poll(void *opaque)
2295 {
2296 CharDriverState *chr = opaque;
2297 NetCharDriver *s = chr->opaque;
2298
2299 s->max_size = qemu_chr_be_can_write(chr);
2300
2301 /* If there were any stray characters in the queue process them
2302 * first
2303 */
2304 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2305 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2306 s->bufptr++;
2307 s->max_size = qemu_chr_be_can_write(chr);
2308 }
2309 return s->max_size;
2310 }
2311
2312 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2313 {
2314 CharDriverState *chr = opaque;
2315 NetCharDriver *s = chr->opaque;
2316 gsize bytes_read = 0;
2317 GIOStatus status;
2318
2319 if (s->max_size == 0) {
2320 return TRUE;
2321 }
2322 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2323 &bytes_read, NULL);
2324 s->bufcnt = bytes_read;
2325 s->bufptr = s->bufcnt;
2326 if (status != G_IO_STATUS_NORMAL) {
2327 remove_fd_in_watch(chr);
2328 return FALSE;
2329 }
2330
2331 s->bufptr = 0;
2332 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2333 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2334 s->bufptr++;
2335 s->max_size = qemu_chr_be_can_write(chr);
2336 }
2337
2338 return TRUE;
2339 }
2340
2341 static void udp_chr_update_read_handler(CharDriverState *chr)
2342 {
2343 NetCharDriver *s = chr->opaque;
2344
2345 remove_fd_in_watch(chr);
2346 if (s->chan) {
2347 chr->fd_in_tag = io_add_watch_poll(s->chan, udp_chr_read_poll,
2348 udp_chr_read, chr);
2349 }
2350 }
2351
2352 static void udp_chr_close(CharDriverState *chr)
2353 {
2354 NetCharDriver *s = chr->opaque;
2355
2356 remove_fd_in_watch(chr);
2357 if (s->chan) {
2358 g_io_channel_unref(s->chan);
2359 closesocket(s->fd);
2360 }
2361 g_free(s);
2362 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2363 }
2364
2365 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2366 {
2367 CharDriverState *chr = NULL;
2368 NetCharDriver *s = NULL;
2369
2370 chr = qemu_chr_alloc();
2371 s = g_malloc0(sizeof(NetCharDriver));
2372
2373 s->fd = fd;
2374 s->chan = io_channel_from_socket(s->fd);
2375 s->bufcnt = 0;
2376 s->bufptr = 0;
2377 chr->opaque = s;
2378 chr->chr_write = udp_chr_write;
2379 chr->chr_update_read_handler = udp_chr_update_read_handler;
2380 chr->chr_close = udp_chr_close;
2381 /* be isn't opened until we get a connection */
2382 chr->explicit_be_open = true;
2383 return chr;
2384 }
2385
2386 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2387 {
2388 Error *local_err = NULL;
2389 int fd = -1;
2390
2391 fd = inet_dgram_opts(opts, &local_err);
2392 if (fd < 0) {
2393 qerror_report_err(local_err);
2394 error_free(local_err);
2395 return NULL;
2396 }
2397 return qemu_chr_open_udp_fd(fd);
2398 }
2399
2400 /***********************************************************/
2401 /* TCP Net console */
2402
2403 typedef struct {
2404
2405 GIOChannel *chan, *listen_chan;
2406 guint listen_tag;
2407 int fd, listen_fd;
2408 int connected;
2409 int max_size;
2410 int do_telnetopt;
2411 int do_nodelay;
2412 int is_unix;
2413 int *read_msgfds;
2414 int read_msgfds_num;
2415 int *write_msgfds;
2416 int write_msgfds_num;
2417 } TCPCharDriver;
2418
2419 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2420
2421 #ifndef _WIN32
2422 static int unix_send_msgfds(CharDriverState *chr, const uint8_t *buf, int len)
2423 {
2424 TCPCharDriver *s = chr->opaque;
2425 struct msghdr msgh;
2426 struct iovec iov;
2427 int r;
2428
2429 size_t fd_size = s->write_msgfds_num * sizeof(int);
2430 char control[CMSG_SPACE(fd_size)];
2431 struct cmsghdr *cmsg;
2432
2433 memset(&msgh, 0, sizeof(msgh));
2434 memset(control, 0, sizeof(control));
2435
2436 /* set the payload */
2437 iov.iov_base = (uint8_t *) buf;
2438 iov.iov_len = len;
2439
2440 msgh.msg_iov = &iov;
2441 msgh.msg_iovlen = 1;
2442
2443 msgh.msg_control = control;
2444 msgh.msg_controllen = sizeof(control);
2445
2446 cmsg = CMSG_FIRSTHDR(&msgh);
2447
2448 cmsg->cmsg_len = CMSG_LEN(fd_size);
2449 cmsg->cmsg_level = SOL_SOCKET;
2450 cmsg->cmsg_type = SCM_RIGHTS;
2451 memcpy(CMSG_DATA(cmsg), s->write_msgfds, fd_size);
2452
2453 do {
2454 r = sendmsg(s->fd, &msgh, 0);
2455 } while (r < 0 && errno == EINTR);
2456
2457 /* free the written msgfds, no matter what */
2458 if (s->write_msgfds_num) {
2459 g_free(s->write_msgfds);
2460 s->write_msgfds = 0;
2461 s->write_msgfds_num = 0;
2462 }
2463
2464 return r;
2465 }
2466 #endif
2467
2468 /* Called with chr_write_lock held. */
2469 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2470 {
2471 TCPCharDriver *s = chr->opaque;
2472 if (s->connected) {
2473 #ifndef _WIN32
2474 if (s->is_unix && s->write_msgfds_num) {
2475 return unix_send_msgfds(chr, buf, len);
2476 } else
2477 #endif
2478 {
2479 return io_channel_send(s->chan, buf, len);
2480 }
2481 } else {
2482 /* XXX: indicate an error ? */
2483 return len;
2484 }
2485 }
2486
2487 static int tcp_chr_read_poll(void *opaque)
2488 {
2489 CharDriverState *chr = opaque;
2490 TCPCharDriver *s = chr->opaque;
2491 if (!s->connected)
2492 return 0;
2493 s->max_size = qemu_chr_be_can_write(chr);
2494 return s->max_size;
2495 }
2496
2497 #define IAC 255
2498 #define IAC_BREAK 243
2499 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2500 TCPCharDriver *s,
2501 uint8_t *buf, int *size)
2502 {
2503 /* Handle any telnet client's basic IAC options to satisfy char by
2504 * char mode with no echo. All IAC options will be removed from
2505 * the buf and the do_telnetopt variable will be used to track the
2506 * state of the width of the IAC information.
2507 *
2508 * IAC commands come in sets of 3 bytes with the exception of the
2509 * "IAC BREAK" command and the double IAC.
2510 */
2511
2512 int i;
2513 int j = 0;
2514
2515 for (i = 0; i < *size; i++) {
2516 if (s->do_telnetopt > 1) {
2517 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2518 /* Double IAC means send an IAC */
2519 if (j != i)
2520 buf[j] = buf[i];
2521 j++;
2522 s->do_telnetopt = 1;
2523 } else {
2524 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2525 /* Handle IAC break commands by sending a serial break */
2526 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2527 s->do_telnetopt++;
2528 }
2529 s->do_telnetopt++;
2530 }
2531 if (s->do_telnetopt >= 4) {
2532 s->do_telnetopt = 1;
2533 }
2534 } else {
2535 if ((unsigned char)buf[i] == IAC) {
2536 s->do_telnetopt = 2;
2537 } else {
2538 if (j != i)
2539 buf[j] = buf[i];
2540 j++;
2541 }
2542 }
2543 }
2544 *size = j;
2545 }
2546
2547 static int tcp_get_msgfds(CharDriverState *chr, int *fds, int num)
2548 {
2549 TCPCharDriver *s = chr->opaque;
2550 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
2551
2552 if (to_copy) {
2553 int i;
2554
2555 memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
2556
2557 /* Close unused fds */
2558 for (i = to_copy; i < s->read_msgfds_num; i++) {
2559 close(s->read_msgfds[i]);
2560 }
2561
2562 g_free(s->read_msgfds);
2563 s->read_msgfds = 0;
2564 s->read_msgfds_num = 0;
2565 }
2566
2567 return to_copy;
2568 }
2569
2570 static int tcp_set_msgfds(CharDriverState *chr, int *fds, int num)
2571 {
2572 TCPCharDriver *s = chr->opaque;
2573
2574 /* clear old pending fd array */
2575 if (s->write_msgfds) {
2576 g_free(s->write_msgfds);
2577 }
2578
2579 if (num) {
2580 s->write_msgfds = g_malloc(num * sizeof(int));
2581 memcpy(s->write_msgfds, fds, num * sizeof(int));
2582 }
2583
2584 s->write_msgfds_num = num;
2585
2586 return 0;
2587 }
2588
2589 #ifndef _WIN32
2590 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2591 {
2592 TCPCharDriver *s = chr->opaque;
2593 struct cmsghdr *cmsg;
2594
2595 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2596 int fd_size, i;
2597
2598 if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) ||
2599 cmsg->cmsg_level != SOL_SOCKET ||
2600 cmsg->cmsg_type != SCM_RIGHTS) {
2601 continue;
2602 }
2603
2604 fd_size = cmsg->cmsg_len - CMSG_LEN(0);
2605
2606 if (!fd_size) {
2607 continue;
2608 }
2609
2610 /* close and clean read_msgfds */
2611 for (i = 0; i < s->read_msgfds_num; i++) {
2612 close(s->read_msgfds[i]);
2613 }
2614
2615 if (s->read_msgfds_num) {
2616 g_free(s->read_msgfds);
2617 }
2618
2619 s->read_msgfds_num = fd_size / sizeof(int);
2620 s->read_msgfds = g_malloc(fd_size);
2621 memcpy(s->read_msgfds, CMSG_DATA(cmsg), fd_size);
2622
2623 for (i = 0; i < s->read_msgfds_num; i++) {
2624 int fd = s->read_msgfds[i];
2625 if (fd < 0) {
2626 continue;
2627 }
2628
2629 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2630 qemu_set_block(fd);
2631
2632 #ifndef MSG_CMSG_CLOEXEC
2633 qemu_set_cloexec(fd);
2634 #endif
2635 }
2636 }
2637 }
2638
2639 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2640 {
2641 TCPCharDriver *s = chr->opaque;
2642 struct msghdr msg = { NULL, };
2643 struct iovec iov[1];
2644 union {
2645 struct cmsghdr cmsg;
2646 char control[CMSG_SPACE(sizeof(int))];
2647 } msg_control;
2648 int flags = 0;
2649 ssize_t ret;
2650
2651 iov[0].iov_base = buf;
2652 iov[0].iov_len = len;
2653
2654 msg.msg_iov = iov;
2655 msg.msg_iovlen = 1;
2656 msg.msg_control = &msg_control;
2657 msg.msg_controllen = sizeof(msg_control);
2658
2659 #ifdef MSG_CMSG_CLOEXEC
2660 flags |= MSG_CMSG_CLOEXEC;
2661 #endif
2662 ret = recvmsg(s->fd, &msg, flags);
2663 if (ret > 0 && s->is_unix) {
2664 unix_process_msgfd(chr, &msg);
2665 }
2666
2667 return ret;
2668 }
2669 #else
2670 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2671 {
2672 TCPCharDriver *s = chr->opaque;
2673 return qemu_recv(s->fd, buf, len, 0);
2674 }
2675 #endif
2676
2677 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2678 {
2679 TCPCharDriver *s = chr->opaque;
2680 return g_io_create_watch(s->chan, cond);
2681 }
2682
2683 static void tcp_chr_disconnect(CharDriverState *chr)
2684 {
2685 TCPCharDriver *s = chr->opaque;
2686
2687 s->connected = 0;
2688 if (s->listen_chan) {
2689 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN,
2690 tcp_chr_accept, chr);
2691 }
2692 remove_fd_in_watch(chr);
2693 g_io_channel_unref(s->chan);
2694 s->chan = NULL;
2695 closesocket(s->fd);
2696 s->fd = -1;
2697 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2698 }
2699
2700 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2701 {
2702 CharDriverState *chr = opaque;
2703 TCPCharDriver *s = chr->opaque;
2704 uint8_t buf[READ_BUF_LEN];
2705 int len, size;
2706
2707 if (cond & G_IO_HUP) {
2708 /* connection closed */
2709 tcp_chr_disconnect(chr);
2710 return TRUE;
2711 }
2712
2713 if (!s->connected || s->max_size <= 0) {
2714 return TRUE;
2715 }
2716 len = sizeof(buf);
2717 if (len > s->max_size)
2718 len = s->max_size;
2719 size = tcp_chr_recv(chr, (void *)buf, len);
2720 if (size == 0) {
2721 /* connection closed */
2722 tcp_chr_disconnect(chr);
2723 } else if (size > 0) {
2724 if (s->do_telnetopt)
2725 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2726 if (size > 0)
2727 qemu_chr_be_write(chr, buf, size);
2728 }
2729
2730 return TRUE;
2731 }
2732
2733 static int tcp_chr_sync_read(CharDriverState *chr, const uint8_t *buf, int len)
2734 {
2735 TCPCharDriver *s = chr->opaque;
2736 int size;
2737
2738 if (!s->connected) {
2739 return 0;
2740 }
2741
2742 size = tcp_chr_recv(chr, (void *) buf, len);
2743 if (size == 0) {
2744 /* connection closed */
2745 tcp_chr_disconnect(chr);
2746 }
2747
2748 return size;
2749 }
2750
2751 #ifndef _WIN32
2752 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2753 {
2754 CharDriverState *chr = qemu_chr_open_fd(eventfd, eventfd);
2755
2756 if (chr) {
2757 chr->avail_connections = 1;
2758 }
2759
2760 return chr;
2761 }
2762 #endif
2763
2764 static void tcp_chr_connect(void *opaque)
2765 {
2766 CharDriverState *chr = opaque;
2767 TCPCharDriver *s = chr->opaque;
2768
2769 s->connected = 1;
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 qemu_chr_be_generic_open(chr);
2775 }
2776
2777 static void tcp_chr_update_read_handler(CharDriverState *chr)
2778 {
2779 TCPCharDriver *s = chr->opaque;
2780
2781 remove_fd_in_watch(chr);
2782 if (s->chan) {
2783 chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
2784 tcp_chr_read, chr);
2785 }
2786 }
2787
2788 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2789 static void tcp_chr_telnet_init(int fd)
2790 {
2791 char buf[3];
2792 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2793 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2794 send(fd, (char *)buf, 3, 0);
2795 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2796 send(fd, (char *)buf, 3, 0);
2797 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2798 send(fd, (char *)buf, 3, 0);
2799 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2800 send(fd, (char *)buf, 3, 0);
2801 }
2802
2803 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2804 {
2805 TCPCharDriver *s = chr->opaque;
2806 if (s->fd != -1)
2807 return -1;
2808
2809 qemu_set_nonblock(fd);
2810 if (s->do_nodelay)
2811 socket_set_nodelay(fd);
2812 s->fd = fd;
2813 s->chan = io_channel_from_socket(fd);
2814 if (s->listen_tag) {
2815 g_source_remove(s->listen_tag);
2816 s->listen_tag = 0;
2817 }
2818 tcp_chr_connect(chr);
2819
2820 return 0;
2821 }
2822
2823 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
2824 {
2825 CharDriverState *chr = opaque;
2826 TCPCharDriver *s = chr->opaque;
2827 struct sockaddr_in saddr;
2828 #ifndef _WIN32
2829 struct sockaddr_un uaddr;
2830 #endif
2831 struct sockaddr *addr;
2832 socklen_t len;
2833 int fd;
2834
2835 for(;;) {
2836 #ifndef _WIN32
2837 if (s->is_unix) {
2838 len = sizeof(uaddr);
2839 addr = (struct sockaddr *)&uaddr;
2840 } else
2841 #endif
2842 {
2843 len = sizeof(saddr);
2844 addr = (struct sockaddr *)&saddr;
2845 }
2846 fd = qemu_accept(s->listen_fd, addr, &len);
2847 if (fd < 0 && errno != EINTR) {
2848 s->listen_tag = 0;
2849 return FALSE;
2850 } else if (fd >= 0) {
2851 if (s->do_telnetopt)
2852 tcp_chr_telnet_init(fd);
2853 break;
2854 }
2855 }
2856 if (tcp_chr_add_client(chr, fd) < 0)
2857 close(fd);
2858
2859 return TRUE;
2860 }
2861
2862 static void tcp_chr_close(CharDriverState *chr)
2863 {
2864 TCPCharDriver *s = chr->opaque;
2865 int i;
2866 if (s->fd >= 0) {
2867 remove_fd_in_watch(chr);
2868 if (s->chan) {
2869 g_io_channel_unref(s->chan);
2870 }
2871 closesocket(s->fd);
2872 }
2873 if (s->listen_fd >= 0) {
2874 if (s->listen_tag) {
2875 g_source_remove(s->listen_tag);
2876 s->listen_tag = 0;
2877 }
2878 if (s->listen_chan) {
2879 g_io_channel_unref(s->listen_chan);
2880 }
2881 closesocket(s->listen_fd);
2882 }
2883 if (s->read_msgfds_num) {
2884 for (i = 0; i < s->read_msgfds_num; i++) {
2885 close(s->read_msgfds[i]);
2886 }
2887 g_free(s->read_msgfds);
2888 }
2889 if (s->write_msgfds_num) {
2890 g_free(s->write_msgfds);
2891 }
2892 g_free(s);
2893 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2894 }
2895
2896 static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
2897 bool is_listen, bool is_telnet,
2898 bool is_waitconnect,
2899 Error **errp)
2900 {
2901 CharDriverState *chr = NULL;
2902 TCPCharDriver *s = NULL;
2903 char host[NI_MAXHOST], serv[NI_MAXSERV];
2904 const char *left = "", *right = "";
2905 struct sockaddr_storage ss;
2906 socklen_t ss_len = sizeof(ss);
2907
2908 memset(&ss, 0, ss_len);
2909 if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2910 error_setg_errno(errp, errno, "getsockname");
2911 return NULL;
2912 }
2913
2914 chr = qemu_chr_alloc();
2915 s = g_malloc0(sizeof(TCPCharDriver));
2916
2917 s->connected = 0;
2918 s->fd = -1;
2919 s->listen_fd = -1;
2920 s->read_msgfds = 0;
2921 s->read_msgfds_num = 0;
2922 s->write_msgfds = 0;
2923 s->write_msgfds_num = 0;
2924
2925 chr->filename = g_malloc(256);
2926 switch (ss.ss_family) {
2927 #ifndef _WIN32
2928 case AF_UNIX:
2929 s->is_unix = 1;
2930 snprintf(chr->filename, 256, "unix:%s%s",
2931 ((struct sockaddr_un *)(&ss))->sun_path,
2932 is_listen ? ",server" : "");
2933 break;
2934 #endif
2935 case AF_INET6:
2936 left = "[";
2937 right = "]";
2938 /* fall through */
2939 case AF_INET:
2940 s->do_nodelay = do_nodelay;
2941 getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
2942 serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
2943 snprintf(chr->filename, 256, "%s:%s%s%s:%s%s",
2944 is_telnet ? "telnet" : "tcp",
2945 left, host, right, serv,
2946 is_listen ? ",server" : "");
2947 break;
2948 }
2949
2950 chr->opaque = s;
2951 chr->chr_write = tcp_chr_write;
2952 chr->chr_sync_read = tcp_chr_sync_read;
2953 chr->chr_close = tcp_chr_close;
2954 chr->get_msgfds = tcp_get_msgfds;
2955 chr->set_msgfds = tcp_set_msgfds;
2956 chr->chr_add_client = tcp_chr_add_client;
2957 chr->chr_add_watch = tcp_chr_add_watch;
2958 chr->chr_update_read_handler = tcp_chr_update_read_handler;
2959 /* be isn't opened until we get a connection */
2960 chr->explicit_be_open = true;
2961
2962 if (is_listen) {
2963 s->listen_fd = fd;
2964 s->listen_chan = io_channel_from_socket(s->listen_fd);
2965 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2966 if (is_telnet) {
2967 s->do_telnetopt = 1;
2968 }
2969 } else {
2970 s->connected = 1;
2971 s->fd = fd;
2972 socket_set_nodelay(fd);
2973 s->chan = io_channel_from_socket(s->fd);
2974 tcp_chr_connect(chr);
2975 }
2976
2977 if (is_listen && is_waitconnect) {
2978 fprintf(stderr, "QEMU waiting for connection on: %s\n",
2979 chr->filename);
2980 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
2981 qemu_set_nonblock(s->listen_fd);
2982 }
2983 return chr;
2984 }
2985
2986 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2987 {
2988 CharDriverState *chr = NULL;
2989 Error *local_err = NULL;
2990 int fd = -1;
2991
2992 bool is_listen = qemu_opt_get_bool(opts, "server", false);
2993 bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true);
2994 bool is_telnet = qemu_opt_get_bool(opts, "telnet", false);
2995 bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true);
2996 bool is_unix = qemu_opt_get(opts, "path") != NULL;
2997
2998 if (is_unix) {
2999 if (is_listen) {
3000 fd = unix_listen_opts(opts, &local_err);
3001 } else {
3002 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
3003 }
3004 } else {
3005 if (is_listen) {
3006 fd = inet_listen_opts(opts, 0, &local_err);
3007 } else {
3008 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
3009 }
3010 }
3011 if (fd < 0) {
3012 goto fail;
3013 }
3014
3015 if (!is_waitconnect)
3016 qemu_set_nonblock(fd);
3017
3018 chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet,
3019 is_waitconnect, &local_err);
3020 if (local_err) {
3021 goto fail;
3022 }
3023 return chr;
3024
3025
3026 fail:
3027 if (local_err) {
3028 qerror_report_err(local_err);
3029 error_free(local_err);
3030 }
3031 if (fd >= 0) {
3032 closesocket(fd);
3033 }
3034 if (chr) {
3035 g_free(chr->opaque);
3036 g_free(chr);
3037 }
3038 return NULL;
3039 }
3040
3041 /*********************************************************/
3042 /* Ring buffer chardev */
3043
3044 typedef struct {
3045 size_t size;
3046 size_t prod;
3047 size_t cons;
3048 uint8_t *cbuf;
3049 } RingBufCharDriver;
3050
3051 static size_t ringbuf_count(const CharDriverState *chr)
3052 {
3053 const RingBufCharDriver *d = chr->opaque;
3054
3055 return d->prod - d->cons;
3056 }
3057
3058 /* Called with chr_write_lock held. */
3059 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
3060 {
3061 RingBufCharDriver *d = chr->opaque;
3062 int i;
3063
3064 if (!buf || (len < 0)) {
3065 return -1;
3066 }
3067
3068 for (i = 0; i < len; i++ ) {
3069 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
3070 if (d->prod - d->cons > d->size) {
3071 d->cons = d->prod - d->size;
3072 }
3073 }
3074
3075 return 0;
3076 }
3077
3078 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
3079 {
3080 RingBufCharDriver *d = chr->opaque;
3081 int i;
3082
3083 qemu_mutex_lock(&chr->chr_write_lock);
3084 for (i = 0; i < len && d->cons != d->prod; i++) {
3085 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
3086 }
3087 qemu_mutex_unlock(&chr->chr_write_lock);
3088
3089 return i;
3090 }
3091
3092 static void ringbuf_chr_close(struct CharDriverState *chr)
3093 {
3094 RingBufCharDriver *d = chr->opaque;
3095
3096 g_free(d->cbuf);
3097 g_free(d);
3098 chr->opaque = NULL;
3099 }
3100
3101 static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts,
3102 Error **errp)
3103 {
3104 CharDriverState *chr;
3105 RingBufCharDriver *d;
3106
3107 chr = qemu_chr_alloc();
3108 d = g_malloc(sizeof(*d));
3109
3110 d->size = opts->has_size ? opts->size : 65536;
3111
3112 /* The size must be power of 2 */
3113 if (d->size & (d->size - 1)) {
3114 error_setg(errp, "size of ringbuf chardev must be power of two");
3115 goto fail;
3116 }
3117
3118 d->prod = 0;
3119 d->cons = 0;
3120 d->cbuf = g_malloc0(d->size);
3121
3122 chr->opaque = d;
3123 chr->chr_write = ringbuf_chr_write;
3124 chr->chr_close = ringbuf_chr_close;
3125
3126 return chr;
3127
3128 fail:
3129 g_free(d);
3130 g_free(chr);
3131 return NULL;
3132 }
3133
3134 bool chr_is_ringbuf(const CharDriverState *chr)
3135 {
3136 return chr->chr_write == ringbuf_chr_write;
3137 }
3138
3139 void qmp_ringbuf_write(const char *device, const char *data,
3140 bool has_format, enum DataFormat format,
3141 Error **errp)
3142 {
3143 CharDriverState *chr;
3144 const uint8_t *write_data;
3145 int ret;
3146 gsize write_count;
3147
3148 chr = qemu_chr_find(device);
3149 if (!chr) {
3150 error_setg(errp, "Device '%s' not found", device);
3151 return;
3152 }
3153
3154 if (!chr_is_ringbuf(chr)) {
3155 error_setg(errp,"%s is not a ringbuf device", device);
3156 return;
3157 }
3158
3159 if (has_format && (format == DATA_FORMAT_BASE64)) {
3160 write_data = g_base64_decode(data, &write_count);
3161 } else {
3162 write_data = (uint8_t *)data;
3163 write_count = strlen(data);
3164 }
3165
3166 ret = ringbuf_chr_write(chr, write_data, write_count);
3167
3168 if (write_data != (uint8_t *)data) {
3169 g_free((void *)write_data);
3170 }
3171
3172 if (ret < 0) {
3173 error_setg(errp, "Failed to write to device %s", device);
3174 return;
3175 }
3176 }
3177
3178 char *qmp_ringbuf_read(const char *device, int64_t size,
3179 bool has_format, enum DataFormat format,
3180 Error **errp)
3181 {
3182 CharDriverState *chr;
3183 uint8_t *read_data;
3184 size_t count;
3185 char *data;
3186
3187 chr = qemu_chr_find(device);
3188 if (!chr) {
3189 error_setg(errp, "Device '%s' not found", device);
3190 return NULL;
3191 }
3192
3193 if (!chr_is_ringbuf(chr)) {
3194 error_setg(errp,"%s is not a ringbuf device", device);
3195 return NULL;
3196 }
3197
3198 if (size <= 0) {
3199 error_setg(errp, "size must be greater than zero");
3200 return NULL;
3201 }
3202
3203 count = ringbuf_count(chr);
3204 size = size > count ? count : size;
3205 read_data = g_malloc(size + 1);
3206
3207 ringbuf_chr_read(chr, read_data, size);
3208
3209 if (has_format && (format == DATA_FORMAT_BASE64)) {
3210 data = g_base64_encode(read_data, size);
3211 g_free(read_data);
3212 } else {
3213 /*
3214 * FIXME should read only complete, valid UTF-8 characters up
3215 * to @size bytes. Invalid sequences should be replaced by a
3216 * suitable replacement character. Except when (and only
3217 * when) ring buffer lost characters since last read, initial
3218 * continuation characters should be dropped.
3219 */
3220 read_data[size] = 0;
3221 data = (char *)read_data;
3222 }
3223
3224 return data;
3225 }
3226
3227 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
3228 {
3229 char host[65], port[33], width[8], height[8];
3230 int pos;
3231 const char *p;
3232 QemuOpts *opts;
3233 Error *local_err = NULL;
3234
3235 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
3236 if (local_err) {
3237 qerror_report_err(local_err);
3238 error_free(local_err);
3239 return NULL;
3240 }
3241
3242 if (strstart(filename, "mon:", &p)) {
3243 filename = p;
3244 qemu_opt_set(opts, "mux", "on");
3245 if (strcmp(filename, "stdio") == 0) {
3246 /* Monitor is muxed to stdio: do not exit on Ctrl+C by default
3247 * but pass it to the guest. Handle this only for compat syntax,
3248 * for -chardev syntax we have special option for this.
3249 * This is what -nographic did, redirecting+muxing serial+monitor
3250 * to stdio causing Ctrl+C to be passed to guest. */
3251 qemu_opt_set(opts, "signal", "off");
3252 }
3253 }
3254
3255 if (strcmp(filename, "null") == 0 ||
3256 strcmp(filename, "pty") == 0 ||
3257 strcmp(filename, "msmouse") == 0 ||
3258 strcmp(filename, "braille") == 0 ||
3259 strcmp(filename, "testdev") == 0 ||
3260 strcmp(filename, "stdio") == 0) {
3261 qemu_opt_set(opts, "backend", filename);
3262 return opts;
3263 }
3264 if (strstart(filename, "vc", &p)) {
3265 qemu_opt_set(opts, "backend", "vc");
3266 if (*p == ':') {
3267 if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
3268 /* pixels */
3269 qemu_opt_set(opts, "width", width);
3270 qemu_opt_set(opts, "height", height);
3271 } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
3272 /* chars */
3273 qemu_opt_set(opts, "cols", width);
3274 qemu_opt_set(opts, "rows", height);
3275 } else {
3276 goto fail;
3277 }
3278 }
3279 return opts;
3280 }
3281 if (strcmp(filename, "con:") == 0) {
3282 qemu_opt_set(opts, "backend", "console");
3283 return opts;
3284 }
3285 if (strstart(filename, "COM", NULL)) {
3286 qemu_opt_set(opts, "backend", "serial");
3287 qemu_opt_set(opts, "path", filename);
3288 return opts;
3289 }
3290 if (strstart(filename, "file:", &p)) {
3291 qemu_opt_set(opts, "backend", "file");
3292 qemu_opt_set(opts, "path", p);
3293 return opts;
3294 }
3295 if (strstart(filename, "pipe:", &p)) {
3296 qemu_opt_set(opts, "backend", "pipe");
3297 qemu_opt_set(opts, "path", p);
3298 return opts;
3299 }
3300 if (strstart(filename, "tcp:", &p) ||
3301 strstart(filename, "telnet:", &p)) {
3302 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3303 host[0] = 0;
3304 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3305 goto fail;
3306 }
3307 qemu_opt_set(opts, "backend", "socket");
3308 qemu_opt_set(opts, "host", host);
3309 qemu_opt_set(opts, "port", port);
3310 if (p[pos] == ',') {
3311 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
3312 goto fail;
3313 }
3314 if (strstart(filename, "telnet:", &p))
3315 qemu_opt_set(opts, "telnet", "on");
3316 return opts;
3317 }
3318 if (strstart(filename, "udp:", &p)) {
3319 qemu_opt_set(opts, "backend", "udp");
3320 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3321 host[0] = 0;
3322 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3323 goto fail;
3324 }
3325 }
3326 qemu_opt_set(opts, "host", host);
3327 qemu_opt_set(opts, "port", port);
3328 if (p[pos] == '@') {
3329 p += pos + 1;
3330 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3331 host[0] = 0;
3332 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3333 goto fail;
3334 }
3335 }
3336 qemu_opt_set(opts, "localaddr", host);
3337 qemu_opt_set(opts, "localport", port);
3338 }
3339 return opts;
3340 }
3341 if (strstart(filename, "unix:", &p)) {
3342 qemu_opt_set(opts, "backend", "socket");
3343 if (qemu_opts_do_parse(opts, p, "path") != 0)
3344 goto fail;
3345 return opts;
3346 }
3347 if (strstart(filename, "/dev/parport", NULL) ||
3348 strstart(filename, "/dev/ppi", NULL)) {
3349 qemu_opt_set(opts, "backend", "parport");
3350 qemu_opt_set(opts, "path", filename);
3351 return opts;
3352 }
3353 if (strstart(filename, "/dev/", NULL)) {
3354 qemu_opt_set(opts, "backend", "tty");
3355 qemu_opt_set(opts, "path", filename);
3356 return opts;
3357 }
3358
3359 fail:
3360 qemu_opts_del(opts);
3361 return NULL;
3362 }
3363
3364 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3365 Error **errp)
3366 {
3367 const char *path = qemu_opt_get(opts, "path");
3368
3369 if (path == NULL) {
3370 error_setg(errp, "chardev: file: no filename given");
3371 return;
3372 }
3373 backend->file = g_new0(ChardevFile, 1);
3374 backend->file->out = g_strdup(path);
3375 }
3376
3377 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3378 Error **errp)
3379 {
3380 backend->stdio = g_new0(ChardevStdio, 1);
3381 backend->stdio->has_signal = true;
3382 backend->stdio->signal = qemu_opt_get_bool(opts, "signal", true);
3383 }
3384
3385 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3386 Error **errp)
3387 {
3388 const char *device = qemu_opt_get(opts, "path");
3389
3390 if (device == NULL) {
3391 error_setg(errp, "chardev: serial/tty: no device path given");
3392 return;
3393 }
3394 backend->serial = g_new0(ChardevHostdev, 1);
3395 backend->serial->device = g_strdup(device);
3396 }
3397
3398 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3399 Error **errp)
3400 {
3401 const char *device = qemu_opt_get(opts, "path");
3402
3403 if (device == NULL) {
3404 error_setg(errp, "chardev: parallel: no device path given");
3405 return;
3406 }
3407 backend->parallel = g_new0(ChardevHostdev, 1);
3408 backend->parallel->device = g_strdup(device);
3409 }
3410
3411 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3412 Error **errp)
3413 {
3414 const char *device = qemu_opt_get(opts, "path");
3415
3416 if (device == NULL) {
3417 error_setg(errp, "chardev: pipe: no device path given");
3418 return;
3419 }
3420 backend->pipe = g_new0(ChardevHostdev, 1);
3421 backend->pipe->device = g_strdup(device);
3422 }
3423
3424 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3425 Error **errp)
3426 {
3427 int val;
3428
3429 backend->ringbuf = g_new0(ChardevRingbuf, 1);
3430
3431 val = qemu_opt_get_size(opts, "size", 0);
3432 if (val != 0) {
3433 backend->ringbuf->has_size = true;
3434 backend->ringbuf->size = val;
3435 }
3436 }
3437
3438 static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
3439 Error **errp)
3440 {
3441 const char *chardev = qemu_opt_get(opts, "chardev");
3442
3443 if (chardev == NULL) {
3444 error_setg(errp, "chardev: mux: no chardev given");
3445 return;
3446 }
3447 backend->mux = g_new0(ChardevMux, 1);
3448 backend->mux->chardev = g_strdup(chardev);
3449 }
3450
3451 typedef struct CharDriver {
3452 const char *name;
3453 /* old, pre qapi */
3454 CharDriverState *(*open)(QemuOpts *opts);
3455 /* new, qapi-based */
3456 ChardevBackendKind kind;
3457 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3458 } CharDriver;
3459
3460 static GSList *backends;
3461
3462 void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *))
3463 {
3464 CharDriver *s;
3465
3466 s = g_malloc0(sizeof(*s));
3467 s->name = g_strdup(name);
3468 s->open = open;
3469
3470 backends = g_slist_append(backends, s);
3471 }
3472
3473 void register_char_driver_qapi(const char *name, ChardevBackendKind kind,
3474 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp))
3475 {
3476 CharDriver *s;
3477
3478 s = g_malloc0(sizeof(*s));
3479 s->name = g_strdup(name);
3480 s->kind = kind;
3481 s->parse = parse;
3482
3483 backends = g_slist_append(backends, s);
3484 }
3485
3486 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3487 void (*init)(struct CharDriverState *s),
3488 Error **errp)
3489 {
3490 Error *local_err = NULL;
3491 CharDriver *cd;
3492 CharDriverState *chr;
3493 GSList *i;
3494
3495 if (qemu_opts_id(opts) == NULL) {
3496 error_setg(errp, "chardev: no id specified");
3497 goto err;
3498 }
3499
3500 if (qemu_opt_get(opts, "backend") == NULL) {
3501 error_setg(errp, "chardev: \"%s\" missing backend",
3502 qemu_opts_id(opts));
3503 goto err;
3504 }
3505 for (i = backends; i; i = i->next) {
3506 cd = i->data;
3507
3508 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3509 break;
3510 }
3511 }
3512 if (i == NULL) {
3513 error_setg(errp, "chardev: backend \"%s\" not found",
3514 qemu_opt_get(opts, "backend"));
3515 goto err;
3516 }
3517
3518 if (!cd->open) {
3519 /* using new, qapi init */
3520 ChardevBackend *backend = g_new0(ChardevBackend, 1);
3521 ChardevReturn *ret = NULL;
3522 const char *id = qemu_opts_id(opts);
3523 char *bid = NULL;
3524
3525 if (qemu_opt_get_bool(opts, "mux", 0)) {
3526 bid = g_strdup_printf("%s-base", id);
3527 }
3528
3529 chr = NULL;
3530 backend->kind = cd->kind;
3531 if (cd->parse) {
3532 cd->parse(opts, backend, &local_err);
3533 if (local_err) {
3534 error_propagate(errp, local_err);
3535 goto qapi_out;
3536 }
3537 }
3538 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3539 if (!ret) {
3540 goto qapi_out;
3541 }
3542
3543 if (bid) {
3544 qapi_free_ChardevBackend(backend);
3545 qapi_free_ChardevReturn(ret);
3546 backend = g_new0(ChardevBackend, 1);
3547 backend->mux = g_new0(ChardevMux, 1);
3548 backend->kind = CHARDEV_BACKEND_KIND_MUX;
3549 backend->mux->chardev = g_strdup(bid);
3550 ret = qmp_chardev_add(id, backend, errp);
3551 if (!ret) {
3552 chr = qemu_chr_find(bid);
3553 qemu_chr_delete(chr);
3554 chr = NULL;
3555 goto qapi_out;
3556 }
3557 }
3558
3559 chr = qemu_chr_find(id);
3560 chr->opts = opts;
3561
3562 qapi_out:
3563 qapi_free_ChardevBackend(backend);
3564 qapi_free_ChardevReturn(ret);
3565 g_free(bid);
3566 return chr;
3567 }
3568
3569 chr = cd->open(opts);
3570 if (!chr) {
3571 error_setg(errp, "chardev: opening backend \"%s\" failed",
3572 qemu_opt_get(opts, "backend"));
3573 goto err;
3574 }
3575
3576 if (!chr->filename)
3577 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
3578 chr->init = init;
3579 /* if we didn't create the chardev via qmp_chardev_add, we
3580 * need to send the OPENED event here
3581 */
3582 if (!chr->explicit_be_open) {
3583 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
3584 }
3585 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3586
3587 if (qemu_opt_get_bool(opts, "mux", 0)) {
3588 CharDriverState *base = chr;
3589 int len = strlen(qemu_opts_id(opts)) + 6;
3590 base->label = g_malloc(len);
3591 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
3592 chr = qemu_chr_open_mux(base);
3593 chr->filename = base->filename;
3594 chr->avail_connections = MAX_MUX;
3595 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3596 } else {
3597 chr->avail_connections = 1;
3598 }
3599 chr->label = g_strdup(qemu_opts_id(opts));
3600 chr->opts = opts;
3601 return chr;
3602
3603 err:
3604 qemu_opts_del(opts);
3605 return NULL;
3606 }
3607
3608 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3609 {
3610 const char *p;
3611 CharDriverState *chr;
3612 QemuOpts *opts;
3613 Error *err = NULL;
3614
3615 if (strstart(filename, "chardev:", &p)) {
3616 return qemu_chr_find(p);
3617 }
3618
3619 opts = qemu_chr_parse_compat(label, filename);
3620 if (!opts)
3621 return NULL;
3622
3623 chr = qemu_chr_new_from_opts(opts, init, &err);
3624 if (err) {
3625 error_report("%s", error_get_pretty(err));
3626 error_free(err);
3627 }
3628 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3629 qemu_chr_fe_claim_no_fail(chr);
3630 monitor_init(chr, MONITOR_USE_READLINE);
3631 }
3632 return chr;
3633 }
3634
3635 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3636 {
3637 if (chr->chr_set_echo) {
3638 chr->chr_set_echo(chr, echo);
3639 }
3640 }
3641
3642 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
3643 {
3644 if (chr->fe_open == fe_open) {
3645 return;
3646 }
3647 chr->fe_open = fe_open;
3648 if (chr->chr_set_fe_open) {
3649 chr->chr_set_fe_open(chr, fe_open);
3650 }
3651 }
3652
3653 void qemu_chr_fe_event(struct CharDriverState *chr, int event)
3654 {
3655 if (chr->chr_fe_event) {
3656 chr->chr_fe_event(chr, event);
3657 }
3658 }
3659
3660 int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3661 GIOFunc func, void *user_data)
3662 {
3663 GSource *src;
3664 guint tag;
3665
3666 if (s->chr_add_watch == NULL) {
3667 return -ENOSYS;
3668 }
3669
3670 src = s->chr_add_watch(s, cond);
3671 if (!src) {
3672 return -EINVAL;
3673 }
3674
3675 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3676 tag = g_source_attach(src, NULL);
3677 g_source_unref(src);
3678
3679 return tag;
3680 }
3681
3682 int qemu_chr_fe_claim(CharDriverState *s)
3683 {
3684 if (s->avail_connections < 1) {
3685 return -1;
3686 }
3687 s->avail_connections--;
3688 return 0;
3689 }
3690
3691 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
3692 {
3693 if (qemu_chr_fe_claim(s) != 0) {
3694 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
3695 __func__, s->label);
3696 exit(1);
3697 }
3698 }
3699
3700 void qemu_chr_fe_release(CharDriverState *s)
3701 {
3702 s->avail_connections++;
3703 }
3704
3705 void qemu_chr_delete(CharDriverState *chr)
3706 {
3707 QTAILQ_REMOVE(&chardevs, chr, next);
3708 if (chr->chr_close) {
3709 chr->chr_close(chr);
3710 }
3711 g_free(chr->filename);
3712 g_free(chr->label);
3713 if (chr->opts) {
3714 qemu_opts_del(chr->opts);
3715 }
3716 g_free(chr);
3717 }
3718
3719 ChardevInfoList *qmp_query_chardev(Error **errp)
3720 {
3721 ChardevInfoList *chr_list = NULL;
3722 CharDriverState *chr;
3723
3724 QTAILQ_FOREACH(chr, &chardevs, next) {
3725 ChardevInfoList *info = g_malloc0(sizeof(*info));
3726 info->value = g_malloc0(sizeof(*info->value));
3727 info->value->label = g_strdup(chr->label);
3728 info->value->filename = g_strdup(chr->filename);
3729 info->value->frontend_open = chr->fe_open;
3730
3731 info->next = chr_list;
3732 chr_list = info;
3733 }
3734
3735 return chr_list;
3736 }
3737
3738 ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp)
3739 {
3740 ChardevBackendInfoList *backend_list = NULL;
3741 CharDriver *c = NULL;
3742 GSList *i = NULL;
3743
3744 for (i = backends; i; i = i->next) {
3745 ChardevBackendInfoList *info = g_malloc0(sizeof(*info));
3746 c = i->data;
3747 info->value = g_malloc0(sizeof(*info->value));
3748 info->value->name = g_strdup(c->name);
3749
3750 info->next = backend_list;
3751 backend_list = info;
3752 }
3753
3754 return backend_list;
3755 }
3756
3757 CharDriverState *qemu_chr_find(const char *name)
3758 {
3759 CharDriverState *chr;
3760
3761 QTAILQ_FOREACH(chr, &chardevs, next) {
3762 if (strcmp(chr->label, name) != 0)
3763 continue;
3764 return chr;
3765 }
3766 return NULL;
3767 }
3768
3769 /* Get a character (serial) device interface. */
3770 CharDriverState *qemu_char_get_next_serial(void)
3771 {
3772 static int next_serial;
3773 CharDriverState *chr;
3774
3775 /* FIXME: This function needs to go away: use chardev properties! */
3776
3777 while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
3778 chr = serial_hds[next_serial++];
3779 qemu_chr_fe_claim_no_fail(chr);
3780 return chr;
3781 }
3782 return NULL;
3783 }
3784
3785 QemuOptsList qemu_chardev_opts = {
3786 .name = "chardev",
3787 .implied_opt_name = "backend",
3788 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3789 .desc = {
3790 {
3791 .name = "backend",
3792 .type = QEMU_OPT_STRING,
3793 },{
3794 .name = "path",
3795 .type = QEMU_OPT_STRING,
3796 },{
3797 .name = "host",
3798 .type = QEMU_OPT_STRING,
3799 },{
3800 .name = "port",
3801 .type = QEMU_OPT_STRING,
3802 },{
3803 .name = "localaddr",
3804 .type = QEMU_OPT_STRING,
3805 },{
3806 .name = "localport",
3807 .type = QEMU_OPT_STRING,
3808 },{
3809 .name = "to",
3810 .type = QEMU_OPT_NUMBER,
3811 },{
3812 .name = "ipv4",
3813 .type = QEMU_OPT_BOOL,
3814 },{
3815 .name = "ipv6",
3816 .type = QEMU_OPT_BOOL,
3817 },{
3818 .name = "wait",
3819 .type = QEMU_OPT_BOOL,
3820 },{
3821 .name = "server",
3822 .type = QEMU_OPT_BOOL,
3823 },{
3824 .name = "delay",
3825 .type = QEMU_OPT_BOOL,
3826 },{
3827 .name = "telnet",
3828 .type = QEMU_OPT_BOOL,
3829 },{
3830 .name = "width",
3831 .type = QEMU_OPT_NUMBER,
3832 },{
3833 .name = "height",
3834 .type = QEMU_OPT_NUMBER,
3835 },{
3836 .name = "cols",
3837 .type = QEMU_OPT_NUMBER,
3838 },{
3839 .name = "rows",
3840 .type = QEMU_OPT_NUMBER,
3841 },{
3842 .name = "mux",
3843 .type = QEMU_OPT_BOOL,
3844 },{
3845 .name = "signal",
3846 .type = QEMU_OPT_BOOL,
3847 },{
3848 .name = "name",
3849 .type = QEMU_OPT_STRING,
3850 },{
3851 .name = "debug",
3852 .type = QEMU_OPT_NUMBER,
3853 },{
3854 .name = "size",
3855 .type = QEMU_OPT_SIZE,
3856 },{
3857 .name = "chardev",
3858 .type = QEMU_OPT_STRING,
3859 },
3860 { /* end of list */ }
3861 },
3862 };
3863
3864 #ifdef _WIN32
3865
3866 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3867 {
3868 HANDLE out;
3869
3870 if (file->has_in) {
3871 error_setg(errp, "input file not supported");
3872 return NULL;
3873 }
3874
3875 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
3876 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
3877 if (out == INVALID_HANDLE_VALUE) {
3878 error_setg(errp, "open %s failed", file->out);
3879 return NULL;
3880 }
3881 return qemu_chr_open_win_file(out);
3882 }
3883
3884 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3885 Error **errp)
3886 {
3887 return qemu_chr_open_win_path(serial->device);
3888 }
3889
3890 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3891 Error **errp)
3892 {
3893 error_setg(errp, "character device backend type 'parallel' not supported");
3894 return NULL;
3895 }
3896
3897 #else /* WIN32 */
3898
3899 static int qmp_chardev_open_file_source(char *src, int flags,
3900 Error **errp)
3901 {
3902 int fd = -1;
3903
3904 TFR(fd = qemu_open(src, flags, 0666));
3905 if (fd == -1) {
3906 error_setg_file_open(errp, errno, src);
3907 }
3908 return fd;
3909 }
3910
3911 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3912 {
3913 int flags, in = -1, out;
3914
3915 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
3916 out = qmp_chardev_open_file_source(file->out, flags, errp);
3917 if (out < 0) {
3918 return NULL;
3919 }
3920
3921 if (file->has_in) {
3922 flags = O_RDONLY;
3923 in = qmp_chardev_open_file_source(file->in, flags, errp);
3924 if (in < 0) {
3925 qemu_close(out);
3926 return NULL;
3927 }
3928 }
3929
3930 return qemu_chr_open_fd(in, out);
3931 }
3932
3933 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3934 Error **errp)
3935 {
3936 #ifdef HAVE_CHARDEV_TTY
3937 int fd;
3938
3939 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
3940 if (fd < 0) {
3941 return NULL;
3942 }
3943 qemu_set_nonblock(fd);
3944 return qemu_chr_open_tty_fd(fd);
3945 #else
3946 error_setg(errp, "character device backend type 'serial' not supported");
3947 return NULL;
3948 #endif
3949 }
3950
3951 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3952 Error **errp)
3953 {
3954 #ifdef HAVE_CHARDEV_PARPORT
3955 int fd;
3956
3957 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
3958 if (fd < 0) {
3959 return NULL;
3960 }
3961 return qemu_chr_open_pp_fd(fd);
3962 #else
3963 error_setg(errp, "character device backend type 'parallel' not supported");
3964 return NULL;
3965 #endif
3966 }
3967
3968 #endif /* WIN32 */
3969
3970 static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
3971 Error **errp)
3972 {
3973 SocketAddress *addr = sock->addr;
3974 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
3975 bool is_listen = sock->has_server ? sock->server : true;
3976 bool is_telnet = sock->has_telnet ? sock->telnet : false;
3977 bool is_waitconnect = sock->has_wait ? sock->wait : false;
3978 int fd;
3979
3980 if (is_listen) {
3981 fd = socket_listen(addr, errp);
3982 } else {
3983 fd = socket_connect(addr, errp, NULL, NULL);
3984 }
3985 if (fd < 0) {
3986 return NULL;
3987 }
3988 return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
3989 is_telnet, is_waitconnect, errp);
3990 }
3991
3992 static CharDriverState *qmp_chardev_open_udp(ChardevUdp *udp,
3993 Error **errp)
3994 {
3995 int fd;
3996
3997 fd = socket_dgram(udp->remote, udp->local, errp);
3998 if (fd < 0) {
3999 return NULL;
4000 }
4001 return qemu_chr_open_udp_fd(fd);
4002 }
4003
4004 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
4005 Error **errp)
4006 {
4007 ChardevReturn *ret = g_new0(ChardevReturn, 1);
4008 CharDriverState *base, *chr = NULL;
4009
4010 chr = qemu_chr_find(id);
4011 if (chr) {
4012 error_setg(errp, "Chardev '%s' already exists", id);
4013 g_free(ret);
4014 return NULL;
4015 }
4016
4017 switch (backend->kind) {
4018 case CHARDEV_BACKEND_KIND_FILE:
4019 chr = qmp_chardev_open_file(backend->file, errp);
4020 break;
4021 case CHARDEV_BACKEND_KIND_SERIAL:
4022 chr = qmp_chardev_open_serial(backend->serial, errp);
4023 break;
4024 case CHARDEV_BACKEND_KIND_PARALLEL:
4025 chr = qmp_chardev_open_parallel(backend->parallel, errp);
4026 break;
4027 case CHARDEV_BACKEND_KIND_PIPE:
4028 chr = qemu_chr_open_pipe(backend->pipe);
4029 break;
4030 case CHARDEV_BACKEND_KIND_SOCKET:
4031 chr = qmp_chardev_open_socket(backend->socket, errp);
4032 break;
4033 case CHARDEV_BACKEND_KIND_UDP:
4034 chr = qmp_chardev_open_udp(backend->udp, errp);
4035 break;
4036 #ifdef HAVE_CHARDEV_TTY
4037 case CHARDEV_BACKEND_KIND_PTY:
4038 chr = qemu_chr_open_pty(id, ret);
4039 break;
4040 #endif
4041 case CHARDEV_BACKEND_KIND_NULL:
4042 chr = qemu_chr_open_null();
4043 break;
4044 case CHARDEV_BACKEND_KIND_MUX:
4045 base = qemu_chr_find(backend->mux->chardev);
4046 if (base == NULL) {
4047 error_setg(errp, "mux: base chardev %s not found",
4048 backend->mux->chardev);
4049 break;
4050 }
4051 chr = qemu_chr_open_mux(base);
4052 break;
4053 case CHARDEV_BACKEND_KIND_MSMOUSE:
4054 chr = qemu_chr_open_msmouse();
4055 break;
4056 #ifdef CONFIG_BRLAPI
4057 case CHARDEV_BACKEND_KIND_BRAILLE:
4058 chr = chr_baum_init();
4059 break;
4060 #endif
4061 case CHARDEV_BACKEND_KIND_TESTDEV:
4062 chr = chr_testdev_init();
4063 break;
4064 case CHARDEV_BACKEND_KIND_STDIO:
4065 chr = qemu_chr_open_stdio(backend->stdio);
4066 break;
4067 #ifdef _WIN32
4068 case CHARDEV_BACKEND_KIND_CONSOLE:
4069 chr = qemu_chr_open_win_con();
4070 break;
4071 #endif
4072 #ifdef CONFIG_SPICE
4073 case CHARDEV_BACKEND_KIND_SPICEVMC:
4074 chr = qemu_chr_open_spice_vmc(backend->spicevmc->type);
4075 break;
4076 case CHARDEV_BACKEND_KIND_SPICEPORT:
4077 chr = qemu_chr_open_spice_port(backend->spiceport->fqdn);
4078 break;
4079 #endif
4080 case CHARDEV_BACKEND_KIND_VC:
4081 chr = vc_init(backend->vc);
4082 break;
4083 case CHARDEV_BACKEND_KIND_RINGBUF:
4084 case CHARDEV_BACKEND_KIND_MEMORY:
4085 chr = qemu_chr_open_ringbuf(backend->ringbuf, errp);
4086 break;
4087 default:
4088 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
4089 break;
4090 }
4091
4092 /*
4093 * Character backend open hasn't been fully converted to the Error
4094 * API. Some opens fail without setting an error. Set a generic
4095 * error then.
4096 * TODO full conversion to Error API
4097 */
4098 if (chr == NULL && errp && !*errp) {
4099 error_setg(errp, "Failed to create chardev");
4100 }
4101 if (chr) {
4102 chr->label = g_strdup(id);
4103 chr->avail_connections =
4104 (backend->kind == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
4105 if (!chr->filename) {
4106 chr->filename = g_strdup(ChardevBackendKind_lookup[backend->kind]);
4107 }
4108 if (!chr->explicit_be_open) {
4109 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
4110 }
4111 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
4112 return ret;
4113 } else {
4114 g_free(ret);
4115 return NULL;
4116 }
4117 }
4118
4119 void qmp_chardev_remove(const char *id, Error **errp)
4120 {
4121 CharDriverState *chr;
4122
4123 chr = qemu_chr_find(id);
4124 if (NULL == chr) {
4125 error_setg(errp, "Chardev '%s' not found", id);
4126 return;
4127 }
4128 if (chr->chr_can_read || chr->chr_read ||
4129 chr->chr_event || chr->handler_opaque) {
4130 error_setg(errp, "Chardev '%s' is busy", id);
4131 return;
4132 }
4133 qemu_chr_delete(chr);
4134 }
4135
4136 static void register_types(void)
4137 {
4138 register_char_driver_qapi("null", CHARDEV_BACKEND_KIND_NULL, NULL);
4139 register_char_driver("socket", qemu_chr_open_socket);
4140 register_char_driver("udp", qemu_chr_open_udp);
4141 register_char_driver_qapi("ringbuf", CHARDEV_BACKEND_KIND_RINGBUF,
4142 qemu_chr_parse_ringbuf);
4143 register_char_driver_qapi("file", CHARDEV_BACKEND_KIND_FILE,
4144 qemu_chr_parse_file_out);
4145 register_char_driver_qapi("stdio", CHARDEV_BACKEND_KIND_STDIO,
4146 qemu_chr_parse_stdio);
4147 register_char_driver_qapi("serial", CHARDEV_BACKEND_KIND_SERIAL,
4148 qemu_chr_parse_serial);
4149 register_char_driver_qapi("tty", CHARDEV_BACKEND_KIND_SERIAL,
4150 qemu_chr_parse_serial);
4151 register_char_driver_qapi("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
4152 qemu_chr_parse_parallel);
4153 register_char_driver_qapi("parport", CHARDEV_BACKEND_KIND_PARALLEL,
4154 qemu_chr_parse_parallel);
4155 register_char_driver_qapi("pty", CHARDEV_BACKEND_KIND_PTY, NULL);
4156 register_char_driver_qapi("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL);
4157 register_char_driver_qapi("pipe", CHARDEV_BACKEND_KIND_PIPE,
4158 qemu_chr_parse_pipe);
4159 register_char_driver_qapi("mux", CHARDEV_BACKEND_KIND_MUX,
4160 qemu_chr_parse_mux);
4161 /* Bug-compatibility: */
4162 register_char_driver_qapi("memory", CHARDEV_BACKEND_KIND_MEMORY,
4163 qemu_chr_parse_ringbuf);
4164 /* this must be done after machine init, since we register FEs with muxes
4165 * as part of realize functions like serial_isa_realizefn when -nographic
4166 * is specified
4167 */
4168 qemu_add_machine_init_done_notifier(&muxes_realize_notify);
4169 }
4170
4171 type_init(register_types);
QEmu