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sheepdog: Avoid deadlock in error path
[qemu.git] / qemu-char.c
blobb562bf88a7a2160ebf01652d6df6aea58d15c966
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu-common.h"
25 #include "net.h"
26 #include "monitor.h"
27 #include "console.h"
28 #include "sysemu.h"
29 #include "qemu-timer.h"
30 #include "qemu-char.h"
31 #include "hw/usb.h"
32 #include "hw/baum.h"
33 #include "hw/msmouse.h"
34 #include "qmp-commands.h"
35
36 #include <unistd.h>
37 #include <fcntl.h>
38 #include <time.h>
39 #include <errno.h>
40 #include <sys/time.h>
41 #include <zlib.h>
42
43 #ifndef _WIN32
44 #include <sys/times.h>
45 #include <sys/wait.h>
46 #include <termios.h>
47 #include <sys/mman.h>
48 #include <sys/ioctl.h>
49 #include <sys/resource.h>
50 #include <sys/socket.h>
51 #include <netinet/in.h>
52 #include <net/if.h>
53 #include <arpa/inet.h>
54 #include <dirent.h>
55 #include <netdb.h>
56 #include <sys/select.h>
57 #ifdef CONFIG_BSD
58 #include <sys/stat.h>
59 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
60 #include <libutil.h>
61 #include <dev/ppbus/ppi.h>
62 #include <dev/ppbus/ppbconf.h>
63 #if defined(__GLIBC__)
64 #include <pty.h>
65 #endif
66 #elif defined(__DragonFly__)
67 #include <libutil.h>
68 #include <dev/misc/ppi/ppi.h>
69 #include <bus/ppbus/ppbconf.h>
70 #else
71 #include <util.h>
72 #endif
73 #else
74 #ifdef __linux__
75 #include <pty.h>
76
77 #include <linux/ppdev.h>
78 #include <linux/parport.h>
79 #endif
80 #ifdef __sun__
81 #include <sys/stat.h>
82 #include <sys/ethernet.h>
83 #include <sys/sockio.h>
84 #include <netinet/arp.h>
85 #include <netinet/in.h>
86 #include <netinet/in_systm.h>
87 #include <netinet/ip.h>
88 #include <netinet/ip_icmp.h> // must come after ip.h
89 #include <netinet/udp.h>
90 #include <netinet/tcp.h>
91 #include <net/if.h>
92 #include <syslog.h>
93 #include <stropts.h>
94 #endif
95 #endif
96 #endif
97
98 #include "qemu_socket.h"
99 #include "ui/qemu-spice.h"
100
101 #define READ_BUF_LEN 4096
102
103 /***********************************************************/
104 /* character device */
105
106 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
107 QTAILQ_HEAD_INITIALIZER(chardevs);
108
109 static void qemu_chr_event(CharDriverState *s, int event)
110 {
111 /* Keep track if the char device is open */
112 switch (event) {
113 case CHR_EVENT_OPENED:
114 s->opened = 1;
115 break;
116 case CHR_EVENT_CLOSED:
117 s->opened = 0;
118 break;
119 }
120
121 if (!s->chr_event)
122 return;
123 s->chr_event(s->handler_opaque, event);
124 }
125
126 static void qemu_chr_generic_open_bh(void *opaque)
127 {
128 CharDriverState *s = opaque;
129 qemu_chr_event(s, CHR_EVENT_OPENED);
130 qemu_bh_delete(s->bh);
131 s->bh = NULL;
132 }
133
134 void qemu_chr_generic_open(CharDriverState *s)
135 {
136 if (s->bh == NULL) {
137 s->bh = qemu_bh_new(qemu_chr_generic_open_bh, s);
138 qemu_bh_schedule(s->bh);
139 }
140 }
141
142 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
143 {
144 return s->chr_write(s, buf, len);
145 }
146
147 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
148 {
149 if (!s->chr_ioctl)
150 return -ENOTSUP;
151 return s->chr_ioctl(s, cmd, arg);
152 }
153
154 int qemu_chr_be_can_write(CharDriverState *s)
155 {
156 if (!s->chr_can_read)
157 return 0;
158 return s->chr_can_read(s->handler_opaque);
159 }
160
161 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
162 {
163 s->chr_read(s->handler_opaque, buf, len);
164 }
165
166 int qemu_chr_fe_get_msgfd(CharDriverState *s)
167 {
168 return s->get_msgfd ? s->get_msgfd(s) : -1;
169 }
170
171 int qemu_chr_add_client(CharDriverState *s, int fd)
172 {
173 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
174 }
175
176 void qemu_chr_accept_input(CharDriverState *s)
177 {
178 if (s->chr_accept_input)
179 s->chr_accept_input(s);
180 }
181
182 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
183 {
184 char buf[READ_BUF_LEN];
185 va_list ap;
186 va_start(ap, fmt);
187 vsnprintf(buf, sizeof(buf), fmt, ap);
188 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
189 va_end(ap);
190 }
191
192 void qemu_chr_add_handlers(CharDriverState *s,
193 IOCanReadHandler *fd_can_read,
194 IOReadHandler *fd_read,
195 IOEventHandler *fd_event,
196 void *opaque)
197 {
198 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
199 /* chr driver being released. */
200 ++s->avail_connections;
201 }
202 s->chr_can_read = fd_can_read;
203 s->chr_read = fd_read;
204 s->chr_event = fd_event;
205 s->handler_opaque = opaque;
206 if (s->chr_update_read_handler)
207 s->chr_update_read_handler(s);
208
209 /* We're connecting to an already opened device, so let's make sure we
210 also get the open event */
211 if (s->opened) {
212 qemu_chr_generic_open(s);
213 }
214 }
215
216 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
217 {
218 return len;
219 }
220
221 static int qemu_chr_open_null(QemuOpts *opts, CharDriverState **_chr)
222 {
223 CharDriverState *chr;
224
225 chr = g_malloc0(sizeof(CharDriverState));
226 chr->chr_write = null_chr_write;
227
228 *_chr= chr;
229 return 0;
230 }
231
232 /* MUX driver for serial I/O splitting */
233 #define MAX_MUX 4
234 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
235 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
236 typedef struct {
237 IOCanReadHandler *chr_can_read[MAX_MUX];
238 IOReadHandler *chr_read[MAX_MUX];
239 IOEventHandler *chr_event[MAX_MUX];
240 void *ext_opaque[MAX_MUX];
241 CharDriverState *drv;
242 int focus;
243 int mux_cnt;
244 int term_got_escape;
245 int max_size;
246 /* Intermediate input buffer allows to catch escape sequences even if the
247 currently active device is not accepting any input - but only until it
248 is full as well. */
249 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
250 int prod[MAX_MUX];
251 int cons[MAX_MUX];
252 int timestamps;
253 int linestart;
254 int64_t timestamps_start;
255 } MuxDriver;
256
257
258 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
259 {
260 MuxDriver *d = chr->opaque;
261 int ret;
262 if (!d->timestamps) {
263 ret = d->drv->chr_write(d->drv, buf, len);
264 } else {
265 int i;
266
267 ret = 0;
268 for (i = 0; i < len; i++) {
269 if (d->linestart) {
270 char buf1[64];
271 int64_t ti;
272 int secs;
273
274 ti = qemu_get_clock_ms(rt_clock);
275 if (d->timestamps_start == -1)
276 d->timestamps_start = ti;
277 ti -= d->timestamps_start;
278 secs = ti / 1000;
279 snprintf(buf1, sizeof(buf1),
280 "[%02d:%02d:%02d.%03d] ",
281 secs / 3600,
282 (secs / 60) % 60,
283 secs % 60,
284 (int)(ti % 1000));
285 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
286 d->linestart = 0;
287 }
288 ret += d->drv->chr_write(d->drv, buf+i, 1);
289 if (buf[i] == '\n') {
290 d->linestart = 1;
291 }
292 }
293 }
294 return ret;
295 }
296
297 static const char * const mux_help[] = {
298 "% h print this help\n\r",
299 "% x exit emulator\n\r",
300 "% s save disk data back to file (if -snapshot)\n\r",
301 "% t toggle console timestamps\n\r"
302 "% b send break (magic sysrq)\n\r",
303 "% c switch between console and monitor\n\r",
304 "% % sends %\n\r",
305 NULL
306 };
307
308 int term_escape_char = 0x01; /* ctrl-a is used for escape */
309 static void mux_print_help(CharDriverState *chr)
310 {
311 int i, j;
312 char ebuf[15] = "Escape-Char";
313 char cbuf[50] = "\n\r";
314
315 if (term_escape_char > 0 && term_escape_char < 26) {
316 snprintf(cbuf, sizeof(cbuf), "\n\r");
317 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
318 } else {
319 snprintf(cbuf, sizeof(cbuf),
320 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
321 term_escape_char);
322 }
323 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
324 for (i = 0; mux_help[i] != NULL; i++) {
325 for (j=0; mux_help[i][j] != '\0'; j++) {
326 if (mux_help[i][j] == '%')
327 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
328 else
329 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
330 }
331 }
332 }
333
334 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
335 {
336 if (d->chr_event[mux_nr])
337 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
338 }
339
340 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
341 {
342 if (d->term_got_escape) {
343 d->term_got_escape = 0;
344 if (ch == term_escape_char)
345 goto send_char;
346 switch(ch) {
347 case '?':
348 case 'h':
349 mux_print_help(chr);
350 break;
351 case 'x':
352 {
353 const char *term = "QEMU: Terminated\n\r";
354 chr->chr_write(chr,(uint8_t *)term,strlen(term));
355 exit(0);
356 break;
357 }
358 case 's':
359 bdrv_commit_all();
360 break;
361 case 'b':
362 qemu_chr_event(chr, CHR_EVENT_BREAK);
363 break;
364 case 'c':
365 /* Switch to the next registered device */
366 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
367 d->focus++;
368 if (d->focus >= d->mux_cnt)
369 d->focus = 0;
370 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
371 break;
372 case 't':
373 d->timestamps = !d->timestamps;
374 d->timestamps_start = -1;
375 d->linestart = 0;
376 break;
377 }
378 } else if (ch == term_escape_char) {
379 d->term_got_escape = 1;
380 } else {
381 send_char:
382 return 1;
383 }
384 return 0;
385 }
386
387 static void mux_chr_accept_input(CharDriverState *chr)
388 {
389 MuxDriver *d = chr->opaque;
390 int m = d->focus;
391
392 while (d->prod[m] != d->cons[m] &&
393 d->chr_can_read[m] &&
394 d->chr_can_read[m](d->ext_opaque[m])) {
395 d->chr_read[m](d->ext_opaque[m],
396 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
397 }
398 }
399
400 static int mux_chr_can_read(void *opaque)
401 {
402 CharDriverState *chr = opaque;
403 MuxDriver *d = chr->opaque;
404 int m = d->focus;
405
406 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
407 return 1;
408 if (d->chr_can_read[m])
409 return d->chr_can_read[m](d->ext_opaque[m]);
410 return 0;
411 }
412
413 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
414 {
415 CharDriverState *chr = opaque;
416 MuxDriver *d = chr->opaque;
417 int m = d->focus;
418 int i;
419
420 mux_chr_accept_input (opaque);
421
422 for(i = 0; i < size; i++)
423 if (mux_proc_byte(chr, d, buf[i])) {
424 if (d->prod[m] == d->cons[m] &&
425 d->chr_can_read[m] &&
426 d->chr_can_read[m](d->ext_opaque[m]))
427 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
428 else
429 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
430 }
431 }
432
433 static void mux_chr_event(void *opaque, int event)
434 {
435 CharDriverState *chr = opaque;
436 MuxDriver *d = chr->opaque;
437 int i;
438
439 /* Send the event to all registered listeners */
440 for (i = 0; i < d->mux_cnt; i++)
441 mux_chr_send_event(d, i, event);
442 }
443
444 static void mux_chr_update_read_handler(CharDriverState *chr)
445 {
446 MuxDriver *d = chr->opaque;
447
448 if (d->mux_cnt >= MAX_MUX) {
449 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
450 return;
451 }
452 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
453 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
454 d->chr_read[d->mux_cnt] = chr->chr_read;
455 d->chr_event[d->mux_cnt] = chr->chr_event;
456 /* Fix up the real driver with mux routines */
457 if (d->mux_cnt == 0) {
458 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
459 mux_chr_event, chr);
460 }
461 if (d->focus != -1) {
462 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
463 }
464 d->focus = d->mux_cnt;
465 d->mux_cnt++;
466 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
467 }
468
469 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
470 {
471 CharDriverState *chr;
472 MuxDriver *d;
473
474 chr = g_malloc0(sizeof(CharDriverState));
475 d = g_malloc0(sizeof(MuxDriver));
476
477 chr->opaque = d;
478 d->drv = drv;
479 d->focus = -1;
480 chr->chr_write = mux_chr_write;
481 chr->chr_update_read_handler = mux_chr_update_read_handler;
482 chr->chr_accept_input = mux_chr_accept_input;
483 /* Frontend guest-open / -close notification is not support with muxes */
484 chr->chr_guest_open = NULL;
485 chr->chr_guest_close = NULL;
486
487 /* Muxes are always open on creation */
488 qemu_chr_generic_open(chr);
489
490 return chr;
491 }
492
493
494 #ifdef _WIN32
495 int send_all(int fd, const void *buf, int len1)
496 {
497 int ret, len;
498
499 len = len1;
500 while (len > 0) {
501 ret = send(fd, buf, len, 0);
502 if (ret < 0) {
503 errno = WSAGetLastError();
504 if (errno != WSAEWOULDBLOCK) {
505 return -1;
506 }
507 } else if (ret == 0) {
508 break;
509 } else {
510 buf += ret;
511 len -= ret;
512 }
513 }
514 return len1 - len;
515 }
516
517 #else
518
519 int send_all(int fd, const void *_buf, int len1)
520 {
521 int ret, len;
522 const uint8_t *buf = _buf;
523
524 len = len1;
525 while (len > 0) {
526 ret = write(fd, buf, len);
527 if (ret < 0) {
528 if (errno != EINTR && errno != EAGAIN)
529 return -1;
530 } else if (ret == 0) {
531 break;
532 } else {
533 buf += ret;
534 len -= ret;
535 }
536 }
537 return len1 - len;
538 }
539 #endif /* !_WIN32 */
540
541 #define STDIO_MAX_CLIENTS 1
542 static int stdio_nb_clients;
543
544 #ifndef _WIN32
545
546 typedef struct {
547 int fd_in, fd_out;
548 int max_size;
549 } FDCharDriver;
550
551
552 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
553 {
554 FDCharDriver *s = chr->opaque;
555 return send_all(s->fd_out, buf, len);
556 }
557
558 static int fd_chr_read_poll(void *opaque)
559 {
560 CharDriverState *chr = opaque;
561 FDCharDriver *s = chr->opaque;
562
563 s->max_size = qemu_chr_be_can_write(chr);
564 return s->max_size;
565 }
566
567 static void fd_chr_read(void *opaque)
568 {
569 CharDriverState *chr = opaque;
570 FDCharDriver *s = chr->opaque;
571 int size, len;
572 uint8_t buf[READ_BUF_LEN];
573
574 len = sizeof(buf);
575 if (len > s->max_size)
576 len = s->max_size;
577 if (len == 0)
578 return;
579 size = read(s->fd_in, buf, len);
580 if (size == 0) {
581 /* FD has been closed. Remove it from the active list. */
582 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
583 qemu_chr_event(chr, CHR_EVENT_CLOSED);
584 return;
585 }
586 if (size > 0) {
587 qemu_chr_be_write(chr, buf, size);
588 }
589 }
590
591 static void fd_chr_update_read_handler(CharDriverState *chr)
592 {
593 FDCharDriver *s = chr->opaque;
594
595 if (s->fd_in >= 0) {
596 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
597 } else {
598 qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
599 fd_chr_read, NULL, chr);
600 }
601 }
602 }
603
604 static void fd_chr_close(struct CharDriverState *chr)
605 {
606 FDCharDriver *s = chr->opaque;
607
608 if (s->fd_in >= 0) {
609 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
610 } else {
611 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
612 }
613 }
614
615 g_free(s);
616 qemu_chr_event(chr, CHR_EVENT_CLOSED);
617 }
618
619 /* open a character device to a unix fd */
620 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
621 {
622 CharDriverState *chr;
623 FDCharDriver *s;
624
625 chr = g_malloc0(sizeof(CharDriverState));
626 s = g_malloc0(sizeof(FDCharDriver));
627 s->fd_in = fd_in;
628 s->fd_out = fd_out;
629 chr->opaque = s;
630 chr->chr_write = fd_chr_write;
631 chr->chr_update_read_handler = fd_chr_update_read_handler;
632 chr->chr_close = fd_chr_close;
633
634 qemu_chr_generic_open(chr);
635
636 return chr;
637 }
638
639 static int qemu_chr_open_file_out(QemuOpts *opts, CharDriverState **_chr)
640 {
641 int fd_out;
642
643 TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
644 O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
645 if (fd_out < 0) {
646 return -errno;
647 }
648
649 *_chr = qemu_chr_open_fd(-1, fd_out);
650 return 0;
651 }
652
653 static int qemu_chr_open_pipe(QemuOpts *opts, CharDriverState **_chr)
654 {
655 int fd_in, fd_out;
656 char filename_in[256], filename_out[256];
657 const char *filename = qemu_opt_get(opts, "path");
658
659 if (filename == NULL) {
660 fprintf(stderr, "chardev: pipe: no filename given\n");
661 return -EINVAL;
662 }
663
664 snprintf(filename_in, 256, "%s.in", filename);
665 snprintf(filename_out, 256, "%s.out", filename);
666 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
667 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
668 if (fd_in < 0 || fd_out < 0) {
669 if (fd_in >= 0)
670 close(fd_in);
671 if (fd_out >= 0)
672 close(fd_out);
673 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
674 if (fd_in < 0) {
675 return -errno;
676 }
677 }
678
679 *_chr = qemu_chr_open_fd(fd_in, fd_out);
680 return 0;
681 }
682
683
684 /* for STDIO, we handle the case where several clients use it
685 (nographic mode) */
686
687 #define TERM_FIFO_MAX_SIZE 1
688
689 static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
690 static int term_fifo_size;
691
692 static int stdio_read_poll(void *opaque)
693 {
694 CharDriverState *chr = opaque;
695
696 /* try to flush the queue if needed */
697 if (term_fifo_size != 0 && qemu_chr_be_can_write(chr) > 0) {
698 qemu_chr_be_write(chr, term_fifo, 1);
699 term_fifo_size = 0;
700 }
701 /* see if we can absorb more chars */
702 if (term_fifo_size == 0)
703 return 1;
704 else
705 return 0;
706 }
707
708 static void stdio_read(void *opaque)
709 {
710 int size;
711 uint8_t buf[1];
712 CharDriverState *chr = opaque;
713
714 size = read(0, buf, 1);
715 if (size == 0) {
716 /* stdin has been closed. Remove it from the active list. */
717 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
718 qemu_chr_event(chr, CHR_EVENT_CLOSED);
719 return;
720 }
721 if (size > 0) {
722 if (qemu_chr_be_can_write(chr) > 0) {
723 qemu_chr_be_write(chr, buf, 1);
724 } else if (term_fifo_size == 0) {
725 term_fifo[term_fifo_size++] = buf[0];
726 }
727 }
728 }
729
730 /* init terminal so that we can grab keys */
731 static struct termios oldtty;
732 static int old_fd0_flags;
733 static bool stdio_allow_signal;
734
735 static void term_exit(void)
736 {
737 tcsetattr (0, TCSANOW, &oldtty);
738 fcntl(0, F_SETFL, old_fd0_flags);
739 }
740
741 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
742 {
743 struct termios tty;
744
745 tty = oldtty;
746 if (!echo) {
747 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
748 |INLCR|IGNCR|ICRNL|IXON);
749 tty.c_oflag |= OPOST;
750 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
751 tty.c_cflag &= ~(CSIZE|PARENB);
752 tty.c_cflag |= CS8;
753 tty.c_cc[VMIN] = 1;
754 tty.c_cc[VTIME] = 0;
755 }
756 /* if graphical mode, we allow Ctrl-C handling */
757 if (!stdio_allow_signal)
758 tty.c_lflag &= ~ISIG;
759
760 tcsetattr (0, TCSANOW, &tty);
761 }
762
763 static void qemu_chr_close_stdio(struct CharDriverState *chr)
764 {
765 term_exit();
766 stdio_nb_clients--;
767 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
768 fd_chr_close(chr);
769 }
770
771 static int qemu_chr_open_stdio(QemuOpts *opts, CharDriverState **_chr)
772 {
773 CharDriverState *chr;
774
775 if (stdio_nb_clients >= STDIO_MAX_CLIENTS) {
776 return -EBUSY;
777 }
778
779 if (stdio_nb_clients == 0) {
780 old_fd0_flags = fcntl(0, F_GETFL);
781 tcgetattr (0, &oldtty);
782 fcntl(0, F_SETFL, O_NONBLOCK);
783 atexit(term_exit);
784 }
785
786 chr = qemu_chr_open_fd(0, 1);
787 chr->chr_close = qemu_chr_close_stdio;
788 chr->chr_set_echo = qemu_chr_set_echo_stdio;
789 qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
790 stdio_nb_clients++;
791 stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
792 display_type != DT_NOGRAPHIC);
793 qemu_chr_fe_set_echo(chr, false);
794
795 *_chr = chr;
796 return 0;
797 }
798
799 #ifdef __sun__
800 /* Once Solaris has openpty(), this is going to be removed. */
801 static int openpty(int *amaster, int *aslave, char *name,
802 struct termios *termp, struct winsize *winp)
803 {
804 const char *slave;
805 int mfd = -1, sfd = -1;
806
807 *amaster = *aslave = -1;
808
809 mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
810 if (mfd < 0)
811 goto err;
812
813 if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
814 goto err;
815
816 if ((slave = ptsname(mfd)) == NULL)
817 goto err;
818
819 if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
820 goto err;
821
822 if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
823 (termp != NULL && tcgetattr(sfd, termp) < 0))
824 goto err;
825
826 if (amaster)
827 *amaster = mfd;
828 if (aslave)
829 *aslave = sfd;
830 if (winp)
831 ioctl(sfd, TIOCSWINSZ, winp);
832
833 return 0;
834
835 err:
836 if (sfd != -1)
837 close(sfd);
838 close(mfd);
839 return -1;
840 }
841
842 static void cfmakeraw (struct termios *termios_p)
843 {
844 termios_p->c_iflag &=
845 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
846 termios_p->c_oflag &= ~OPOST;
847 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
848 termios_p->c_cflag &= ~(CSIZE|PARENB);
849 termios_p->c_cflag |= CS8;
850
851 termios_p->c_cc[VMIN] = 0;
852 termios_p->c_cc[VTIME] = 0;
853 }
854 #endif
855
856 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
857 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
858 || defined(__GLIBC__)
859
860 typedef struct {
861 int fd;
862 int connected;
863 int polling;
864 int read_bytes;
865 QEMUTimer *timer;
866 } PtyCharDriver;
867
868 static void pty_chr_update_read_handler(CharDriverState *chr);
869 static void pty_chr_state(CharDriverState *chr, int connected);
870
871 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
872 {
873 PtyCharDriver *s = chr->opaque;
874
875 if (!s->connected) {
876 /* guest sends data, check for (re-)connect */
877 pty_chr_update_read_handler(chr);
878 return 0;
879 }
880 return send_all(s->fd, buf, len);
881 }
882
883 static int pty_chr_read_poll(void *opaque)
884 {
885 CharDriverState *chr = opaque;
886 PtyCharDriver *s = chr->opaque;
887
888 s->read_bytes = qemu_chr_be_can_write(chr);
889 return s->read_bytes;
890 }
891
892 static void pty_chr_read(void *opaque)
893 {
894 CharDriverState *chr = opaque;
895 PtyCharDriver *s = chr->opaque;
896 int size, len;
897 uint8_t buf[READ_BUF_LEN];
898
899 len = sizeof(buf);
900 if (len > s->read_bytes)
901 len = s->read_bytes;
902 if (len == 0)
903 return;
904 size = read(s->fd, buf, len);
905 if ((size == -1 && errno == EIO) ||
906 (size == 0)) {
907 pty_chr_state(chr, 0);
908 return;
909 }
910 if (size > 0) {
911 pty_chr_state(chr, 1);
912 qemu_chr_be_write(chr, buf, size);
913 }
914 }
915
916 static void pty_chr_update_read_handler(CharDriverState *chr)
917 {
918 PtyCharDriver *s = chr->opaque;
919
920 qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
921 pty_chr_read, NULL, chr);
922 s->polling = 1;
923 /*
924 * Short timeout here: just need wait long enougth that qemu makes
925 * it through the poll loop once. When reconnected we want a
926 * short timeout so we notice it almost instantly. Otherwise
927 * read() gives us -EIO instantly, making pty_chr_state() reset the
928 * timeout to the normal (much longer) poll interval before the
929 * timer triggers.
930 */
931 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 10);
932 }
933
934 static void pty_chr_state(CharDriverState *chr, int connected)
935 {
936 PtyCharDriver *s = chr->opaque;
937
938 if (!connected) {
939 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
940 s->connected = 0;
941 s->polling = 0;
942 /* (re-)connect poll interval for idle guests: once per second.
943 * We check more frequently in case the guests sends data to
944 * the virtual device linked to our pty. */
945 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 1000);
946 } else {
947 if (!s->connected)
948 qemu_chr_generic_open(chr);
949 s->connected = 1;
950 }
951 }
952
953 static void pty_chr_timer(void *opaque)
954 {
955 struct CharDriverState *chr = opaque;
956 PtyCharDriver *s = chr->opaque;
957
958 if (s->connected)
959 return;
960 if (s->polling) {
961 /* If we arrive here without polling being cleared due
962 * read returning -EIO, then we are (re-)connected */
963 pty_chr_state(chr, 1);
964 return;
965 }
966
967 /* Next poll ... */
968 pty_chr_update_read_handler(chr);
969 }
970
971 static void pty_chr_close(struct CharDriverState *chr)
972 {
973 PtyCharDriver *s = chr->opaque;
974
975 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
976 close(s->fd);
977 qemu_del_timer(s->timer);
978 qemu_free_timer(s->timer);
979 g_free(s);
980 qemu_chr_event(chr, CHR_EVENT_CLOSED);
981 }
982
983 static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr)
984 {
985 CharDriverState *chr;
986 PtyCharDriver *s;
987 struct termios tty;
988 int master_fd, slave_fd, len;
989 #if defined(__OpenBSD__) || defined(__DragonFly__)
990 char pty_name[PATH_MAX];
991 #define q_ptsname(x) pty_name
992 #else
993 char *pty_name = NULL;
994 #define q_ptsname(x) ptsname(x)
995 #endif
996
997 if (openpty(&master_fd, &slave_fd, pty_name, NULL, NULL) < 0) {
998 return -errno;
999 }
1000
1001 /* Set raw attributes on the pty. */
1002 tcgetattr(slave_fd, &tty);
1003 cfmakeraw(&tty);
1004 tcsetattr(slave_fd, TCSAFLUSH, &tty);
1005 close(slave_fd);
1006
1007 chr = g_malloc0(sizeof(CharDriverState));
1008
1009 len = strlen(q_ptsname(master_fd)) + 5;
1010 chr->filename = g_malloc(len);
1011 snprintf(chr->filename, len, "pty:%s", q_ptsname(master_fd));
1012 qemu_opt_set(opts, "path", q_ptsname(master_fd));
1013 fprintf(stderr, "char device redirected to %s\n", q_ptsname(master_fd));
1014
1015 s = g_malloc0(sizeof(PtyCharDriver));
1016 chr->opaque = s;
1017 chr->chr_write = pty_chr_write;
1018 chr->chr_update_read_handler = pty_chr_update_read_handler;
1019 chr->chr_close = pty_chr_close;
1020
1021 s->fd = master_fd;
1022 s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr);
1023
1024 *_chr = chr;
1025 return 0;
1026 }
1027
1028 static void tty_serial_init(int fd, int speed,
1029 int parity, int data_bits, int stop_bits)
1030 {
1031 struct termios tty;
1032 speed_t spd;
1033
1034 #if 0
1035 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1036 speed, parity, data_bits, stop_bits);
1037 #endif
1038 tcgetattr (fd, &tty);
1039
1040 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1041 speed = speed * 10 / 11;
1042 do {
1043 check_speed(50);
1044 check_speed(75);
1045 check_speed(110);
1046 check_speed(134);
1047 check_speed(150);
1048 check_speed(200);
1049 check_speed(300);
1050 check_speed(600);
1051 check_speed(1200);
1052 check_speed(1800);
1053 check_speed(2400);
1054 check_speed(4800);
1055 check_speed(9600);
1056 check_speed(19200);
1057 check_speed(38400);
1058 /* Non-Posix values follow. They may be unsupported on some systems. */
1059 check_speed(57600);
1060 check_speed(115200);
1061 #ifdef B230400
1062 check_speed(230400);
1063 #endif
1064 #ifdef B460800
1065 check_speed(460800);
1066 #endif
1067 #ifdef B500000
1068 check_speed(500000);
1069 #endif
1070 #ifdef B576000
1071 check_speed(576000);
1072 #endif
1073 #ifdef B921600
1074 check_speed(921600);
1075 #endif
1076 #ifdef B1000000
1077 check_speed(1000000);
1078 #endif
1079 #ifdef B1152000
1080 check_speed(1152000);
1081 #endif
1082 #ifdef B1500000
1083 check_speed(1500000);
1084 #endif
1085 #ifdef B2000000
1086 check_speed(2000000);
1087 #endif
1088 #ifdef B2500000
1089 check_speed(2500000);
1090 #endif
1091 #ifdef B3000000
1092 check_speed(3000000);
1093 #endif
1094 #ifdef B3500000
1095 check_speed(3500000);
1096 #endif
1097 #ifdef B4000000
1098 check_speed(4000000);
1099 #endif
1100 spd = B115200;
1101 } while (0);
1102
1103 cfsetispeed(&tty, spd);
1104 cfsetospeed(&tty, spd);
1105
1106 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1107 |INLCR|IGNCR|ICRNL|IXON);
1108 tty.c_oflag |= OPOST;
1109 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1110 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1111 switch(data_bits) {
1112 default:
1113 case 8:
1114 tty.c_cflag |= CS8;
1115 break;
1116 case 7:
1117 tty.c_cflag |= CS7;
1118 break;
1119 case 6:
1120 tty.c_cflag |= CS6;
1121 break;
1122 case 5:
1123 tty.c_cflag |= CS5;
1124 break;
1125 }
1126 switch(parity) {
1127 default:
1128 case 'N':
1129 break;
1130 case 'E':
1131 tty.c_cflag |= PARENB;
1132 break;
1133 case 'O':
1134 tty.c_cflag |= PARENB | PARODD;
1135 break;
1136 }
1137 if (stop_bits == 2)
1138 tty.c_cflag |= CSTOPB;
1139
1140 tcsetattr (fd, TCSANOW, &tty);
1141 }
1142
1143 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1144 {
1145 FDCharDriver *s = chr->opaque;
1146
1147 switch(cmd) {
1148 case CHR_IOCTL_SERIAL_SET_PARAMS:
1149 {
1150 QEMUSerialSetParams *ssp = arg;
1151 tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1152 ssp->data_bits, ssp->stop_bits);
1153 }
1154 break;
1155 case CHR_IOCTL_SERIAL_SET_BREAK:
1156 {
1157 int enable = *(int *)arg;
1158 if (enable)
1159 tcsendbreak(s->fd_in, 1);
1160 }
1161 break;
1162 case CHR_IOCTL_SERIAL_GET_TIOCM:
1163 {
1164 int sarg = 0;
1165 int *targ = (int *)arg;
1166 ioctl(s->fd_in, TIOCMGET, &sarg);
1167 *targ = 0;
1168 if (sarg & TIOCM_CTS)
1169 *targ |= CHR_TIOCM_CTS;
1170 if (sarg & TIOCM_CAR)
1171 *targ |= CHR_TIOCM_CAR;
1172 if (sarg & TIOCM_DSR)
1173 *targ |= CHR_TIOCM_DSR;
1174 if (sarg & TIOCM_RI)
1175 *targ |= CHR_TIOCM_RI;
1176 if (sarg & TIOCM_DTR)
1177 *targ |= CHR_TIOCM_DTR;
1178 if (sarg & TIOCM_RTS)
1179 *targ |= CHR_TIOCM_RTS;
1180 }
1181 break;
1182 case CHR_IOCTL_SERIAL_SET_TIOCM:
1183 {
1184 int sarg = *(int *)arg;
1185 int targ = 0;
1186 ioctl(s->fd_in, TIOCMGET, &targ);
1187 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1188 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1189 if (sarg & CHR_TIOCM_CTS)
1190 targ |= TIOCM_CTS;
1191 if (sarg & CHR_TIOCM_CAR)
1192 targ |= TIOCM_CAR;
1193 if (sarg & CHR_TIOCM_DSR)
1194 targ |= TIOCM_DSR;
1195 if (sarg & CHR_TIOCM_RI)
1196 targ |= TIOCM_RI;
1197 if (sarg & CHR_TIOCM_DTR)
1198 targ |= TIOCM_DTR;
1199 if (sarg & CHR_TIOCM_RTS)
1200 targ |= TIOCM_RTS;
1201 ioctl(s->fd_in, TIOCMSET, &targ);
1202 }
1203 break;
1204 default:
1205 return -ENOTSUP;
1206 }
1207 return 0;
1208 }
1209
1210 static void qemu_chr_close_tty(CharDriverState *chr)
1211 {
1212 FDCharDriver *s = chr->opaque;
1213 int fd = -1;
1214
1215 if (s) {
1216 fd = s->fd_in;
1217 }
1218
1219 fd_chr_close(chr);
1220
1221 if (fd >= 0) {
1222 close(fd);
1223 }
1224 }
1225
1226 static int qemu_chr_open_tty(QemuOpts *opts, CharDriverState **_chr)
1227 {
1228 const char *filename = qemu_opt_get(opts, "path");
1229 CharDriverState *chr;
1230 int fd;
1231
1232 TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK));
1233 if (fd < 0) {
1234 return -errno;
1235 }
1236 tty_serial_init(fd, 115200, 'N', 8, 1);
1237 chr = qemu_chr_open_fd(fd, fd);
1238 chr->chr_ioctl = tty_serial_ioctl;
1239 chr->chr_close = qemu_chr_close_tty;
1240
1241 *_chr = chr;
1242 return 0;
1243 }
1244 #else /* ! __linux__ && ! __sun__ */
1245 static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr)
1246 {
1247 return -ENOTSUP;
1248 }
1249 #endif /* __linux__ || __sun__ */
1250
1251 #if defined(__linux__)
1252 typedef struct {
1253 int fd;
1254 int mode;
1255 } ParallelCharDriver;
1256
1257 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1258 {
1259 if (s->mode != mode) {
1260 int m = mode;
1261 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1262 return 0;
1263 s->mode = mode;
1264 }
1265 return 1;
1266 }
1267
1268 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1269 {
1270 ParallelCharDriver *drv = chr->opaque;
1271 int fd = drv->fd;
1272 uint8_t b;
1273
1274 switch(cmd) {
1275 case CHR_IOCTL_PP_READ_DATA:
1276 if (ioctl(fd, PPRDATA, &b) < 0)
1277 return -ENOTSUP;
1278 *(uint8_t *)arg = b;
1279 break;
1280 case CHR_IOCTL_PP_WRITE_DATA:
1281 b = *(uint8_t *)arg;
1282 if (ioctl(fd, PPWDATA, &b) < 0)
1283 return -ENOTSUP;
1284 break;
1285 case CHR_IOCTL_PP_READ_CONTROL:
1286 if (ioctl(fd, PPRCONTROL, &b) < 0)
1287 return -ENOTSUP;
1288 /* Linux gives only the lowest bits, and no way to know data
1289 direction! For better compatibility set the fixed upper
1290 bits. */
1291 *(uint8_t *)arg = b | 0xc0;
1292 break;
1293 case CHR_IOCTL_PP_WRITE_CONTROL:
1294 b = *(uint8_t *)arg;
1295 if (ioctl(fd, PPWCONTROL, &b) < 0)
1296 return -ENOTSUP;
1297 break;
1298 case CHR_IOCTL_PP_READ_STATUS:
1299 if (ioctl(fd, PPRSTATUS, &b) < 0)
1300 return -ENOTSUP;
1301 *(uint8_t *)arg = b;
1302 break;
1303 case CHR_IOCTL_PP_DATA_DIR:
1304 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1305 return -ENOTSUP;
1306 break;
1307 case CHR_IOCTL_PP_EPP_READ_ADDR:
1308 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1309 struct ParallelIOArg *parg = arg;
1310 int n = read(fd, parg->buffer, parg->count);
1311 if (n != parg->count) {
1312 return -EIO;
1313 }
1314 }
1315 break;
1316 case CHR_IOCTL_PP_EPP_READ:
1317 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1318 struct ParallelIOArg *parg = arg;
1319 int n = read(fd, parg->buffer, parg->count);
1320 if (n != parg->count) {
1321 return -EIO;
1322 }
1323 }
1324 break;
1325 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1326 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1327 struct ParallelIOArg *parg = arg;
1328 int n = write(fd, parg->buffer, parg->count);
1329 if (n != parg->count) {
1330 return -EIO;
1331 }
1332 }
1333 break;
1334 case CHR_IOCTL_PP_EPP_WRITE:
1335 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1336 struct ParallelIOArg *parg = arg;
1337 int n = write(fd, parg->buffer, parg->count);
1338 if (n != parg->count) {
1339 return -EIO;
1340 }
1341 }
1342 break;
1343 default:
1344 return -ENOTSUP;
1345 }
1346 return 0;
1347 }
1348
1349 static void pp_close(CharDriverState *chr)
1350 {
1351 ParallelCharDriver *drv = chr->opaque;
1352 int fd = drv->fd;
1353
1354 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1355 ioctl(fd, PPRELEASE);
1356 close(fd);
1357 g_free(drv);
1358 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1359 }
1360
1361 static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr)
1362 {
1363 const char *filename = qemu_opt_get(opts, "path");
1364 CharDriverState *chr;
1365 ParallelCharDriver *drv;
1366 int fd;
1367
1368 TFR(fd = open(filename, O_RDWR));
1369 if (fd < 0) {
1370 return -errno;
1371 }
1372
1373 if (ioctl(fd, PPCLAIM) < 0) {
1374 close(fd);
1375 return -errno;
1376 }
1377
1378 drv = g_malloc0(sizeof(ParallelCharDriver));
1379 drv->fd = fd;
1380 drv->mode = IEEE1284_MODE_COMPAT;
1381
1382 chr = g_malloc0(sizeof(CharDriverState));
1383 chr->chr_write = null_chr_write;
1384 chr->chr_ioctl = pp_ioctl;
1385 chr->chr_close = pp_close;
1386 chr->opaque = drv;
1387
1388 qemu_chr_generic_open(chr);
1389
1390 *_chr = chr;
1391 return 0;
1392 }
1393 #endif /* __linux__ */
1394
1395 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1396 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1397 {
1398 int fd = (int)(intptr_t)chr->opaque;
1399 uint8_t b;
1400
1401 switch(cmd) {
1402 case CHR_IOCTL_PP_READ_DATA:
1403 if (ioctl(fd, PPIGDATA, &b) < 0)
1404 return -ENOTSUP;
1405 *(uint8_t *)arg = b;
1406 break;
1407 case CHR_IOCTL_PP_WRITE_DATA:
1408 b = *(uint8_t *)arg;
1409 if (ioctl(fd, PPISDATA, &b) < 0)
1410 return -ENOTSUP;
1411 break;
1412 case CHR_IOCTL_PP_READ_CONTROL:
1413 if (ioctl(fd, PPIGCTRL, &b) < 0)
1414 return -ENOTSUP;
1415 *(uint8_t *)arg = b;
1416 break;
1417 case CHR_IOCTL_PP_WRITE_CONTROL:
1418 b = *(uint8_t *)arg;
1419 if (ioctl(fd, PPISCTRL, &b) < 0)
1420 return -ENOTSUP;
1421 break;
1422 case CHR_IOCTL_PP_READ_STATUS:
1423 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1424 return -ENOTSUP;
1425 *(uint8_t *)arg = b;
1426 break;
1427 default:
1428 return -ENOTSUP;
1429 }
1430 return 0;
1431 }
1432
1433 static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr)
1434 {
1435 const char *filename = qemu_opt_get(opts, "path");
1436 CharDriverState *chr;
1437 int fd;
1438
1439 fd = qemu_open(filename, O_RDWR);
1440 if (fd < 0) {
1441 return -errno;
1442 }
1443
1444 chr = g_malloc0(sizeof(CharDriverState));
1445 chr->opaque = (void *)(intptr_t)fd;
1446 chr->chr_write = null_chr_write;
1447 chr->chr_ioctl = pp_ioctl;
1448
1449 *_chr = chr;
1450 return 0;
1451 }
1452 #endif
1453
1454 #else /* _WIN32 */
1455
1456 static CharDriverState *stdio_clients[STDIO_MAX_CLIENTS];
1457
1458 typedef struct {
1459 int max_size;
1460 HANDLE hcom, hrecv, hsend;
1461 OVERLAPPED orecv, osend;
1462 BOOL fpipe;
1463 DWORD len;
1464 } WinCharState;
1465
1466 typedef struct {
1467 HANDLE hStdIn;
1468 HANDLE hInputReadyEvent;
1469 HANDLE hInputDoneEvent;
1470 HANDLE hInputThread;
1471 uint8_t win_stdio_buf;
1472 } WinStdioCharState;
1473
1474 #define NSENDBUF 2048
1475 #define NRECVBUF 2048
1476 #define MAXCONNECT 1
1477 #define NTIMEOUT 5000
1478
1479 static int win_chr_poll(void *opaque);
1480 static int win_chr_pipe_poll(void *opaque);
1481
1482 static void win_chr_close(CharDriverState *chr)
1483 {
1484 WinCharState *s = chr->opaque;
1485
1486 if (s->hsend) {
1487 CloseHandle(s->hsend);
1488 s->hsend = NULL;
1489 }
1490 if (s->hrecv) {
1491 CloseHandle(s->hrecv);
1492 s->hrecv = NULL;
1493 }
1494 if (s->hcom) {
1495 CloseHandle(s->hcom);
1496 s->hcom = NULL;
1497 }
1498 if (s->fpipe)
1499 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1500 else
1501 qemu_del_polling_cb(win_chr_poll, chr);
1502
1503 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1504 }
1505
1506 static int win_chr_init(CharDriverState *chr, const char *filename)
1507 {
1508 WinCharState *s = chr->opaque;
1509 COMMCONFIG comcfg;
1510 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1511 COMSTAT comstat;
1512 DWORD size;
1513 DWORD err;
1514
1515 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1516 if (!s->hsend) {
1517 fprintf(stderr, "Failed CreateEvent\n");
1518 goto fail;
1519 }
1520 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1521 if (!s->hrecv) {
1522 fprintf(stderr, "Failed CreateEvent\n");
1523 goto fail;
1524 }
1525
1526 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1527 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1528 if (s->hcom == INVALID_HANDLE_VALUE) {
1529 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1530 s->hcom = NULL;
1531 goto fail;
1532 }
1533
1534 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1535 fprintf(stderr, "Failed SetupComm\n");
1536 goto fail;
1537 }
1538
1539 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1540 size = sizeof(COMMCONFIG);
1541 GetDefaultCommConfig(filename, &comcfg, &size);
1542 comcfg.dcb.DCBlength = sizeof(DCB);
1543 CommConfigDialog(filename, NULL, &comcfg);
1544
1545 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1546 fprintf(stderr, "Failed SetCommState\n");
1547 goto fail;
1548 }
1549
1550 if (!SetCommMask(s->hcom, EV_ERR)) {
1551 fprintf(stderr, "Failed SetCommMask\n");
1552 goto fail;
1553 }
1554
1555 cto.ReadIntervalTimeout = MAXDWORD;
1556 if (!SetCommTimeouts(s->hcom, &cto)) {
1557 fprintf(stderr, "Failed SetCommTimeouts\n");
1558 goto fail;
1559 }
1560
1561 if (!ClearCommError(s->hcom, &err, &comstat)) {
1562 fprintf(stderr, "Failed ClearCommError\n");
1563 goto fail;
1564 }
1565 qemu_add_polling_cb(win_chr_poll, chr);
1566 return 0;
1567
1568 fail:
1569 win_chr_close(chr);
1570 return -1;
1571 }
1572
1573 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1574 {
1575 WinCharState *s = chr->opaque;
1576 DWORD len, ret, size, err;
1577
1578 len = len1;
1579 ZeroMemory(&s->osend, sizeof(s->osend));
1580 s->osend.hEvent = s->hsend;
1581 while (len > 0) {
1582 if (s->hsend)
1583 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1584 else
1585 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1586 if (!ret) {
1587 err = GetLastError();
1588 if (err == ERROR_IO_PENDING) {
1589 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1590 if (ret) {
1591 buf += size;
1592 len -= size;
1593 } else {
1594 break;
1595 }
1596 } else {
1597 break;
1598 }
1599 } else {
1600 buf += size;
1601 len -= size;
1602 }
1603 }
1604 return len1 - len;
1605 }
1606
1607 static int win_chr_read_poll(CharDriverState *chr)
1608 {
1609 WinCharState *s = chr->opaque;
1610
1611 s->max_size = qemu_chr_be_can_write(chr);
1612 return s->max_size;
1613 }
1614
1615 static void win_chr_readfile(CharDriverState *chr)
1616 {
1617 WinCharState *s = chr->opaque;
1618 int ret, err;
1619 uint8_t buf[READ_BUF_LEN];
1620 DWORD size;
1621
1622 ZeroMemory(&s->orecv, sizeof(s->orecv));
1623 s->orecv.hEvent = s->hrecv;
1624 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1625 if (!ret) {
1626 err = GetLastError();
1627 if (err == ERROR_IO_PENDING) {
1628 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1629 }
1630 }
1631
1632 if (size > 0) {
1633 qemu_chr_be_write(chr, buf, size);
1634 }
1635 }
1636
1637 static void win_chr_read(CharDriverState *chr)
1638 {
1639 WinCharState *s = chr->opaque;
1640
1641 if (s->len > s->max_size)
1642 s->len = s->max_size;
1643 if (s->len == 0)
1644 return;
1645
1646 win_chr_readfile(chr);
1647 }
1648
1649 static int win_chr_poll(void *opaque)
1650 {
1651 CharDriverState *chr = opaque;
1652 WinCharState *s = chr->opaque;
1653 COMSTAT status;
1654 DWORD comerr;
1655
1656 ClearCommError(s->hcom, &comerr, &status);
1657 if (status.cbInQue > 0) {
1658 s->len = status.cbInQue;
1659 win_chr_read_poll(chr);
1660 win_chr_read(chr);
1661 return 1;
1662 }
1663 return 0;
1664 }
1665
1666 static int qemu_chr_open_win(QemuOpts *opts, CharDriverState **_chr)
1667 {
1668 const char *filename = qemu_opt_get(opts, "path");
1669 CharDriverState *chr;
1670 WinCharState *s;
1671
1672 chr = g_malloc0(sizeof(CharDriverState));
1673 s = g_malloc0(sizeof(WinCharState));
1674 chr->opaque = s;
1675 chr->chr_write = win_chr_write;
1676 chr->chr_close = win_chr_close;
1677
1678 if (win_chr_init(chr, filename) < 0) {
1679 g_free(s);
1680 g_free(chr);
1681 return -EIO;
1682 }
1683 qemu_chr_generic_open(chr);
1684
1685 *_chr = chr;
1686 return 0;
1687 }
1688
1689 static int win_chr_pipe_poll(void *opaque)
1690 {
1691 CharDriverState *chr = opaque;
1692 WinCharState *s = chr->opaque;
1693 DWORD size;
1694
1695 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1696 if (size > 0) {
1697 s->len = size;
1698 win_chr_read_poll(chr);
1699 win_chr_read(chr);
1700 return 1;
1701 }
1702 return 0;
1703 }
1704
1705 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1706 {
1707 WinCharState *s = chr->opaque;
1708 OVERLAPPED ov;
1709 int ret;
1710 DWORD size;
1711 char openname[256];
1712
1713 s->fpipe = TRUE;
1714
1715 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1716 if (!s->hsend) {
1717 fprintf(stderr, "Failed CreateEvent\n");
1718 goto fail;
1719 }
1720 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1721 if (!s->hrecv) {
1722 fprintf(stderr, "Failed CreateEvent\n");
1723 goto fail;
1724 }
1725
1726 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1727 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1728 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1729 PIPE_WAIT,
1730 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1731 if (s->hcom == INVALID_HANDLE_VALUE) {
1732 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1733 s->hcom = NULL;
1734 goto fail;
1735 }
1736
1737 ZeroMemory(&ov, sizeof(ov));
1738 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1739 ret = ConnectNamedPipe(s->hcom, &ov);
1740 if (ret) {
1741 fprintf(stderr, "Failed ConnectNamedPipe\n");
1742 goto fail;
1743 }
1744
1745 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1746 if (!ret) {
1747 fprintf(stderr, "Failed GetOverlappedResult\n");
1748 if (ov.hEvent) {
1749 CloseHandle(ov.hEvent);
1750 ov.hEvent = NULL;
1751 }
1752 goto fail;
1753 }
1754
1755 if (ov.hEvent) {
1756 CloseHandle(ov.hEvent);
1757 ov.hEvent = NULL;
1758 }
1759 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1760 return 0;
1761
1762 fail:
1763 win_chr_close(chr);
1764 return -1;
1765 }
1766
1767
1768 static int qemu_chr_open_win_pipe(QemuOpts *opts, CharDriverState **_chr)
1769 {
1770 const char *filename = qemu_opt_get(opts, "path");
1771 CharDriverState *chr;
1772 WinCharState *s;
1773
1774 chr = g_malloc0(sizeof(CharDriverState));
1775 s = g_malloc0(sizeof(WinCharState));
1776 chr->opaque = s;
1777 chr->chr_write = win_chr_write;
1778 chr->chr_close = win_chr_close;
1779
1780 if (win_chr_pipe_init(chr, filename) < 0) {
1781 g_free(s);
1782 g_free(chr);
1783 return -EIO;
1784 }
1785 qemu_chr_generic_open(chr);
1786
1787 *_chr = chr;
1788 return 0;
1789 }
1790
1791 static int qemu_chr_open_win_file(HANDLE fd_out, CharDriverState **pchr)
1792 {
1793 CharDriverState *chr;
1794 WinCharState *s;
1795
1796 chr = g_malloc0(sizeof(CharDriverState));
1797 s = g_malloc0(sizeof(WinCharState));
1798 s->hcom = fd_out;
1799 chr->opaque = s;
1800 chr->chr_write = win_chr_write;
1801 qemu_chr_generic_open(chr);
1802 *pchr = chr;
1803 return 0;
1804 }
1805
1806 static int qemu_chr_open_win_con(QemuOpts *opts, CharDriverState **chr)
1807 {
1808 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE), chr);
1809 }
1810
1811 static int qemu_chr_open_win_file_out(QemuOpts *opts, CharDriverState **_chr)
1812 {
1813 const char *file_out = qemu_opt_get(opts, "path");
1814 HANDLE fd_out;
1815
1816 fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1817 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1818 if (fd_out == INVALID_HANDLE_VALUE) {
1819 return -EIO;
1820 }
1821
1822 return qemu_chr_open_win_file(fd_out, _chr);
1823 }
1824
1825 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1826 {
1827 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1828 DWORD dwSize;
1829 int len1;
1830
1831 len1 = len;
1832
1833 while (len1 > 0) {
1834 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1835 break;
1836 }
1837 buf += dwSize;
1838 len1 -= dwSize;
1839 }
1840
1841 return len - len1;
1842 }
1843
1844 static void win_stdio_wait_func(void *opaque)
1845 {
1846 CharDriverState *chr = opaque;
1847 WinStdioCharState *stdio = chr->opaque;
1848 INPUT_RECORD buf[4];
1849 int ret;
1850 DWORD dwSize;
1851 int i;
1852
1853 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
1854 &dwSize);
1855
1856 if (!ret) {
1857 /* Avoid error storm */
1858 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
1859 return;
1860 }
1861
1862 for (i = 0; i < dwSize; i++) {
1863 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
1864
1865 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
1866 int j;
1867 if (kev->uChar.AsciiChar != 0) {
1868 for (j = 0; j < kev->wRepeatCount; j++) {
1869 if (qemu_chr_be_can_write(chr)) {
1870 uint8_t c = kev->uChar.AsciiChar;
1871 qemu_chr_be_write(chr, &c, 1);
1872 }
1873 }
1874 }
1875 }
1876 }
1877 }
1878
1879 static DWORD WINAPI win_stdio_thread(LPVOID param)
1880 {
1881 CharDriverState *chr = param;
1882 WinStdioCharState *stdio = chr->opaque;
1883 int ret;
1884 DWORD dwSize;
1885
1886 while (1) {
1887
1888 /* Wait for one byte */
1889 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
1890
1891 /* Exit in case of error, continue if nothing read */
1892 if (!ret) {
1893 break;
1894 }
1895 if (!dwSize) {
1896 continue;
1897 }
1898
1899 /* Some terminal emulator returns \r\n for Enter, just pass \n */
1900 if (stdio->win_stdio_buf == '\r') {
1901 continue;
1902 }
1903
1904 /* Signal the main thread and wait until the byte was eaten */
1905 if (!SetEvent(stdio->hInputReadyEvent)) {
1906 break;
1907 }
1908 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
1909 != WAIT_OBJECT_0) {
1910 break;
1911 }
1912 }
1913
1914 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
1915 return 0;
1916 }
1917
1918 static void win_stdio_thread_wait_func(void *opaque)
1919 {
1920 CharDriverState *chr = opaque;
1921 WinStdioCharState *stdio = chr->opaque;
1922
1923 if (qemu_chr_be_can_write(chr)) {
1924 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
1925 }
1926
1927 SetEvent(stdio->hInputDoneEvent);
1928 }
1929
1930 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
1931 {
1932 WinStdioCharState *stdio = chr->opaque;
1933 DWORD dwMode = 0;
1934
1935 GetConsoleMode(stdio->hStdIn, &dwMode);
1936
1937 if (echo) {
1938 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
1939 } else {
1940 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
1941 }
1942 }
1943
1944 static void win_stdio_close(CharDriverState *chr)
1945 {
1946 WinStdioCharState *stdio = chr->opaque;
1947
1948 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
1949 CloseHandle(stdio->hInputReadyEvent);
1950 }
1951 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
1952 CloseHandle(stdio->hInputDoneEvent);
1953 }
1954 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
1955 TerminateThread(stdio->hInputThread, 0);
1956 }
1957
1958 g_free(chr->opaque);
1959 g_free(chr);
1960 stdio_nb_clients--;
1961 }
1962
1963 static int qemu_chr_open_win_stdio(QemuOpts *opts, CharDriverState **_chr)
1964 {
1965 CharDriverState *chr;
1966 WinStdioCharState *stdio;
1967 DWORD dwMode;
1968 int is_console = 0;
1969
1970 if (stdio_nb_clients >= STDIO_MAX_CLIENTS
1971 || ((display_type != DT_NOGRAPHIC) && (stdio_nb_clients != 0))) {
1972 return -EIO;
1973 }
1974
1975 chr = g_malloc0(sizeof(CharDriverState));
1976 stdio = g_malloc0(sizeof(WinStdioCharState));
1977
1978 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
1979 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
1980 fprintf(stderr, "cannot open stdio: invalid handle\n");
1981 exit(1);
1982 }
1983
1984 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
1985
1986 chr->opaque = stdio;
1987 chr->chr_write = win_stdio_write;
1988 chr->chr_close = win_stdio_close;
1989
1990 if (stdio_nb_clients == 0) {
1991 if (is_console) {
1992 if (qemu_add_wait_object(stdio->hStdIn,
1993 win_stdio_wait_func, chr)) {
1994 fprintf(stderr, "qemu_add_wait_object: failed\n");
1995 }
1996 } else {
1997 DWORD dwId;
1998
1999 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2000 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2001 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2002 chr, 0, &dwId);
2003
2004 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2005 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2006 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2007 fprintf(stderr, "cannot create stdio thread or event\n");
2008 exit(1);
2009 }
2010 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2011 win_stdio_thread_wait_func, chr)) {
2012 fprintf(stderr, "qemu_add_wait_object: failed\n");
2013 }
2014 }
2015 }
2016
2017 dwMode |= ENABLE_LINE_INPUT;
2018
2019 stdio_clients[stdio_nb_clients++] = chr;
2020 if (stdio_nb_clients == 1 && is_console) {
2021 /* set the terminal in raw mode */
2022 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2023 dwMode |= ENABLE_PROCESSED_INPUT;
2024 }
2025
2026 SetConsoleMode(stdio->hStdIn, dwMode);
2027
2028 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2029 qemu_chr_fe_set_echo(chr, false);
2030
2031 *_chr = chr;
2032
2033 return 0;
2034 }
2035 #endif /* !_WIN32 */
2036
2037 /***********************************************************/
2038 /* UDP Net console */
2039
2040 typedef struct {
2041 int fd;
2042 uint8_t buf[READ_BUF_LEN];
2043 int bufcnt;
2044 int bufptr;
2045 int max_size;
2046 } NetCharDriver;
2047
2048 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2049 {
2050 NetCharDriver *s = chr->opaque;
2051
2052 return send(s->fd, (const void *)buf, len, 0);
2053 }
2054
2055 static int udp_chr_read_poll(void *opaque)
2056 {
2057 CharDriverState *chr = opaque;
2058 NetCharDriver *s = chr->opaque;
2059
2060 s->max_size = qemu_chr_be_can_write(chr);
2061
2062 /* If there were any stray characters in the queue process them
2063 * first
2064 */
2065 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2066 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2067 s->bufptr++;
2068 s->max_size = qemu_chr_be_can_write(chr);
2069 }
2070 return s->max_size;
2071 }
2072
2073 static void udp_chr_read(void *opaque)
2074 {
2075 CharDriverState *chr = opaque;
2076 NetCharDriver *s = chr->opaque;
2077
2078 if (s->max_size == 0)
2079 return;
2080 s->bufcnt = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0);
2081 s->bufptr = s->bufcnt;
2082 if (s->bufcnt <= 0)
2083 return;
2084
2085 s->bufptr = 0;
2086 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2087 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2088 s->bufptr++;
2089 s->max_size = qemu_chr_be_can_write(chr);
2090 }
2091 }
2092
2093 static void udp_chr_update_read_handler(CharDriverState *chr)
2094 {
2095 NetCharDriver *s = chr->opaque;
2096
2097 if (s->fd >= 0) {
2098 qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
2099 udp_chr_read, NULL, chr);
2100 }
2101 }
2102
2103 static void udp_chr_close(CharDriverState *chr)
2104 {
2105 NetCharDriver *s = chr->opaque;
2106 if (s->fd >= 0) {
2107 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2108 closesocket(s->fd);
2109 }
2110 g_free(s);
2111 qemu_chr_event(chr, CHR_EVENT_CLOSED);
2112 }
2113
2114 static int qemu_chr_open_udp(QemuOpts *opts, CharDriverState **_chr)
2115 {
2116 CharDriverState *chr = NULL;
2117 NetCharDriver *s = NULL;
2118 int fd = -1;
2119 int ret;
2120
2121 chr = g_malloc0(sizeof(CharDriverState));
2122 s = g_malloc0(sizeof(NetCharDriver));
2123
2124 fd = inet_dgram_opts(opts);
2125 if (fd < 0) {
2126 fprintf(stderr, "inet_dgram_opts failed\n");
2127 ret = -errno;
2128 goto return_err;
2129 }
2130
2131 s->fd = fd;
2132 s->bufcnt = 0;
2133 s->bufptr = 0;
2134 chr->opaque = s;
2135 chr->chr_write = udp_chr_write;
2136 chr->chr_update_read_handler = udp_chr_update_read_handler;
2137 chr->chr_close = udp_chr_close;
2138
2139 *_chr = chr;
2140 return 0;
2141
2142 return_err:
2143 g_free(chr);
2144 g_free(s);
2145 if (fd >= 0) {
2146 closesocket(fd);
2147 }
2148 return ret;
2149 }
2150
2151 /***********************************************************/
2152 /* TCP Net console */
2153
2154 typedef struct {
2155 int fd, listen_fd;
2156 int connected;
2157 int max_size;
2158 int do_telnetopt;
2159 int do_nodelay;
2160 int is_unix;
2161 int msgfd;
2162 } TCPCharDriver;
2163
2164 static void tcp_chr_accept(void *opaque);
2165
2166 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2167 {
2168 TCPCharDriver *s = chr->opaque;
2169 if (s->connected) {
2170 return send_all(s->fd, buf, len);
2171 } else {
2172 /* XXX: indicate an error ? */
2173 return len;
2174 }
2175 }
2176
2177 static int tcp_chr_read_poll(void *opaque)
2178 {
2179 CharDriverState *chr = opaque;
2180 TCPCharDriver *s = chr->opaque;
2181 if (!s->connected)
2182 return 0;
2183 s->max_size = qemu_chr_be_can_write(chr);
2184 return s->max_size;
2185 }
2186
2187 #define IAC 255
2188 #define IAC_BREAK 243
2189 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2190 TCPCharDriver *s,
2191 uint8_t *buf, int *size)
2192 {
2193 /* Handle any telnet client's basic IAC options to satisfy char by
2194 * char mode with no echo. All IAC options will be removed from
2195 * the buf and the do_telnetopt variable will be used to track the
2196 * state of the width of the IAC information.
2197 *
2198 * IAC commands come in sets of 3 bytes with the exception of the
2199 * "IAC BREAK" command and the double IAC.
2200 */
2201
2202 int i;
2203 int j = 0;
2204
2205 for (i = 0; i < *size; i++) {
2206 if (s->do_telnetopt > 1) {
2207 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2208 /* Double IAC means send an IAC */
2209 if (j != i)
2210 buf[j] = buf[i];
2211 j++;
2212 s->do_telnetopt = 1;
2213 } else {
2214 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2215 /* Handle IAC break commands by sending a serial break */
2216 qemu_chr_event(chr, CHR_EVENT_BREAK);
2217 s->do_telnetopt++;
2218 }
2219 s->do_telnetopt++;
2220 }
2221 if (s->do_telnetopt >= 4) {
2222 s->do_telnetopt = 1;
2223 }
2224 } else {
2225 if ((unsigned char)buf[i] == IAC) {
2226 s->do_telnetopt = 2;
2227 } else {
2228 if (j != i)
2229 buf[j] = buf[i];
2230 j++;
2231 }
2232 }
2233 }
2234 *size = j;
2235 }
2236
2237 static int tcp_get_msgfd(CharDriverState *chr)
2238 {
2239 TCPCharDriver *s = chr->opaque;
2240 int fd = s->msgfd;
2241 s->msgfd = -1;
2242 return fd;
2243 }
2244
2245 #ifndef _WIN32
2246 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2247 {
2248 TCPCharDriver *s = chr->opaque;
2249 struct cmsghdr *cmsg;
2250
2251 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2252 int fd;
2253
2254 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2255 cmsg->cmsg_level != SOL_SOCKET ||
2256 cmsg->cmsg_type != SCM_RIGHTS)
2257 continue;
2258
2259 fd = *((int *)CMSG_DATA(cmsg));
2260 if (fd < 0)
2261 continue;
2262
2263 if (s->msgfd != -1)
2264 close(s->msgfd);
2265 s->msgfd = fd;
2266 }
2267 }
2268
2269 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2270 {
2271 TCPCharDriver *s = chr->opaque;
2272 struct msghdr msg = { NULL, };
2273 struct iovec iov[1];
2274 union {
2275 struct cmsghdr cmsg;
2276 char control[CMSG_SPACE(sizeof(int))];
2277 } msg_control;
2278 ssize_t ret;
2279
2280 iov[0].iov_base = buf;
2281 iov[0].iov_len = len;
2282
2283 msg.msg_iov = iov;
2284 msg.msg_iovlen = 1;
2285 msg.msg_control = &msg_control;
2286 msg.msg_controllen = sizeof(msg_control);
2287
2288 ret = recvmsg(s->fd, &msg, 0);
2289 if (ret > 0 && s->is_unix)
2290 unix_process_msgfd(chr, &msg);
2291
2292 return ret;
2293 }
2294 #else
2295 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2296 {
2297 TCPCharDriver *s = chr->opaque;
2298 return qemu_recv(s->fd, buf, len, 0);
2299 }
2300 #endif
2301
2302 static void tcp_chr_read(void *opaque)
2303 {
2304 CharDriverState *chr = opaque;
2305 TCPCharDriver *s = chr->opaque;
2306 uint8_t buf[READ_BUF_LEN];
2307 int len, size;
2308
2309 if (!s->connected || s->max_size <= 0)
2310 return;
2311 len = sizeof(buf);
2312 if (len > s->max_size)
2313 len = s->max_size;
2314 size = tcp_chr_recv(chr, (void *)buf, len);
2315 if (size == 0) {
2316 /* connection closed */
2317 s->connected = 0;
2318 if (s->listen_fd >= 0) {
2319 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2320 }
2321 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2322 closesocket(s->fd);
2323 s->fd = -1;
2324 qemu_chr_event(chr, CHR_EVENT_CLOSED);
2325 } else if (size > 0) {
2326 if (s->do_telnetopt)
2327 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2328 if (size > 0)
2329 qemu_chr_be_write(chr, buf, size);
2330 }
2331 }
2332
2333 #ifndef _WIN32
2334 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2335 {
2336 return qemu_chr_open_fd(eventfd, eventfd);
2337 }
2338 #endif
2339
2340 static void tcp_chr_connect(void *opaque)
2341 {
2342 CharDriverState *chr = opaque;
2343 TCPCharDriver *s = chr->opaque;
2344
2345 s->connected = 1;
2346 qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2347 tcp_chr_read, NULL, chr);
2348 qemu_chr_generic_open(chr);
2349 }
2350
2351 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2352 static void tcp_chr_telnet_init(int fd)
2353 {
2354 char buf[3];
2355 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2356 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2357 send(fd, (char *)buf, 3, 0);
2358 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2359 send(fd, (char *)buf, 3, 0);
2360 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2361 send(fd, (char *)buf, 3, 0);
2362 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2363 send(fd, (char *)buf, 3, 0);
2364 }
2365
2366 static void socket_set_nodelay(int fd)
2367 {
2368 int val = 1;
2369 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2370 }
2371
2372 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2373 {
2374 TCPCharDriver *s = chr->opaque;
2375 if (s->fd != -1)
2376 return -1;
2377
2378 socket_set_nonblock(fd);
2379 if (s->do_nodelay)
2380 socket_set_nodelay(fd);
2381 s->fd = fd;
2382 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2383 tcp_chr_connect(chr);
2384
2385 return 0;
2386 }
2387
2388 static void tcp_chr_accept(void *opaque)
2389 {
2390 CharDriverState *chr = opaque;
2391 TCPCharDriver *s = chr->opaque;
2392 struct sockaddr_in saddr;
2393 #ifndef _WIN32
2394 struct sockaddr_un uaddr;
2395 #endif
2396 struct sockaddr *addr;
2397 socklen_t len;
2398 int fd;
2399
2400 for(;;) {
2401 #ifndef _WIN32
2402 if (s->is_unix) {
2403 len = sizeof(uaddr);
2404 addr = (struct sockaddr *)&uaddr;
2405 } else
2406 #endif
2407 {
2408 len = sizeof(saddr);
2409 addr = (struct sockaddr *)&saddr;
2410 }
2411 fd = qemu_accept(s->listen_fd, addr, &len);
2412 if (fd < 0 && errno != EINTR) {
2413 return;
2414 } else if (fd >= 0) {
2415 if (s->do_telnetopt)
2416 tcp_chr_telnet_init(fd);
2417 break;
2418 }
2419 }
2420 if (tcp_chr_add_client(chr, fd) < 0)
2421 close(fd);
2422 }
2423
2424 static void tcp_chr_close(CharDriverState *chr)
2425 {
2426 TCPCharDriver *s = chr->opaque;
2427 if (s->fd >= 0) {
2428 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2429 closesocket(s->fd);
2430 }
2431 if (s->listen_fd >= 0) {
2432 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2433 closesocket(s->listen_fd);
2434 }
2435 g_free(s);
2436 qemu_chr_event(chr, CHR_EVENT_CLOSED);
2437 }
2438
2439 static int qemu_chr_open_socket(QemuOpts *opts, CharDriverState **_chr)
2440 {
2441 CharDriverState *chr = NULL;
2442 TCPCharDriver *s = NULL;
2443 int fd = -1;
2444 int is_listen;
2445 int is_waitconnect;
2446 int do_nodelay;
2447 int is_unix;
2448 int is_telnet;
2449 int ret;
2450
2451 is_listen = qemu_opt_get_bool(opts, "server", 0);
2452 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2453 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2454 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2455 is_unix = qemu_opt_get(opts, "path") != NULL;
2456 if (!is_listen)
2457 is_waitconnect = 0;
2458
2459 chr = g_malloc0(sizeof(CharDriverState));
2460 s = g_malloc0(sizeof(TCPCharDriver));
2461
2462 if (is_unix) {
2463 if (is_listen) {
2464 fd = unix_listen_opts(opts);
2465 } else {
2466 fd = unix_connect_opts(opts);
2467 }
2468 } else {
2469 if (is_listen) {
2470 fd = inet_listen_opts(opts, 0);
2471 } else {
2472 fd = inet_connect_opts(opts);
2473 }
2474 }
2475 if (fd < 0) {
2476 ret = -errno;
2477 goto fail;
2478 }
2479
2480 if (!is_waitconnect)
2481 socket_set_nonblock(fd);
2482
2483 s->connected = 0;
2484 s->fd = -1;
2485 s->listen_fd = -1;
2486 s->msgfd = -1;
2487 s->is_unix = is_unix;
2488 s->do_nodelay = do_nodelay && !is_unix;
2489
2490 chr->opaque = s;
2491 chr->chr_write = tcp_chr_write;
2492 chr->chr_close = tcp_chr_close;
2493 chr->get_msgfd = tcp_get_msgfd;
2494 chr->chr_add_client = tcp_chr_add_client;
2495
2496 if (is_listen) {
2497 s->listen_fd = fd;
2498 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2499 if (is_telnet)
2500 s->do_telnetopt = 1;
2501
2502 } else {
2503 s->connected = 1;
2504 s->fd = fd;
2505 socket_set_nodelay(fd);
2506 tcp_chr_connect(chr);
2507 }
2508
2509 /* for "info chardev" monitor command */
2510 chr->filename = g_malloc(256);
2511 if (is_unix) {
2512 snprintf(chr->filename, 256, "unix:%s%s",
2513 qemu_opt_get(opts, "path"),
2514 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2515 } else if (is_telnet) {
2516 snprintf(chr->filename, 256, "telnet:%s:%s%s",
2517 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2518 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2519 } else {
2520 snprintf(chr->filename, 256, "tcp:%s:%s%s",
2521 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2522 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2523 }
2524
2525 if (is_listen && is_waitconnect) {
2526 printf("QEMU waiting for connection on: %s\n",
2527 chr->filename);
2528 tcp_chr_accept(chr);
2529 socket_set_nonblock(s->listen_fd);
2530 }
2531
2532 *_chr = chr;
2533 return 0;
2534
2535 fail:
2536 if (fd >= 0)
2537 closesocket(fd);
2538 g_free(s);
2539 g_free(chr);
2540 return ret;
2541 }
2542
2543 /***********************************************************/
2544 /* Memory chardev */
2545 typedef struct {
2546 size_t outbuf_size;
2547 size_t outbuf_capacity;
2548 uint8_t *outbuf;
2549 } MemoryDriver;
2550
2551 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2552 {
2553 MemoryDriver *d = chr->opaque;
2554
2555 /* TODO: the QString implementation has the same code, we should
2556 * introduce a generic way to do this in cutils.c */
2557 if (d->outbuf_capacity < d->outbuf_size + len) {
2558 /* grow outbuf */
2559 d->outbuf_capacity += len;
2560 d->outbuf_capacity *= 2;
2561 d->outbuf = g_realloc(d->outbuf, d->outbuf_capacity);
2562 }
2563
2564 memcpy(d->outbuf + d->outbuf_size, buf, len);
2565 d->outbuf_size += len;
2566
2567 return len;
2568 }
2569
2570 void qemu_chr_init_mem(CharDriverState *chr)
2571 {
2572 MemoryDriver *d;
2573
2574 d = g_malloc(sizeof(*d));
2575 d->outbuf_size = 0;
2576 d->outbuf_capacity = 4096;
2577 d->outbuf = g_malloc0(d->outbuf_capacity);
2578
2579 memset(chr, 0, sizeof(*chr));
2580 chr->opaque = d;
2581 chr->chr_write = mem_chr_write;
2582 }
2583
2584 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2585 {
2586 MemoryDriver *d = chr->opaque;
2587 return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2588 }
2589
2590 /* NOTE: this driver can not be closed with qemu_chr_delete()! */
2591 void qemu_chr_close_mem(CharDriverState *chr)
2592 {
2593 MemoryDriver *d = chr->opaque;
2594
2595 g_free(d->outbuf);
2596 g_free(chr->opaque);
2597 chr->opaque = NULL;
2598 chr->chr_write = NULL;
2599 }
2600
2601 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2602 {
2603 const MemoryDriver *d = chr->opaque;
2604 return d->outbuf_size;
2605 }
2606
2607 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2608 {
2609 char host[65], port[33], width[8], height[8];
2610 int pos;
2611 const char *p;
2612 QemuOpts *opts;
2613
2614 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
2615 if (NULL == opts)
2616 return NULL;
2617
2618 if (strstart(filename, "mon:", &p)) {
2619 filename = p;
2620 qemu_opt_set(opts, "mux", "on");
2621 }
2622
2623 if (strcmp(filename, "null") == 0 ||
2624 strcmp(filename, "pty") == 0 ||
2625 strcmp(filename, "msmouse") == 0 ||
2626 strcmp(filename, "braille") == 0 ||
2627 strcmp(filename, "stdio") == 0) {
2628 qemu_opt_set(opts, "backend", filename);
2629 return opts;
2630 }
2631 if (strstart(filename, "vc", &p)) {
2632 qemu_opt_set(opts, "backend", "vc");
2633 if (*p == ':') {
2634 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2635 /* pixels */
2636 qemu_opt_set(opts, "width", width);
2637 qemu_opt_set(opts, "height", height);
2638 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2639 /* chars */
2640 qemu_opt_set(opts, "cols", width);
2641 qemu_opt_set(opts, "rows", height);
2642 } else {
2643 goto fail;
2644 }
2645 }
2646 return opts;
2647 }
2648 if (strcmp(filename, "con:") == 0) {
2649 qemu_opt_set(opts, "backend", "console");
2650 return opts;
2651 }
2652 if (strstart(filename, "COM", NULL)) {
2653 qemu_opt_set(opts, "backend", "serial");
2654 qemu_opt_set(opts, "path", filename);
2655 return opts;
2656 }
2657 if (strstart(filename, "file:", &p)) {
2658 qemu_opt_set(opts, "backend", "file");
2659 qemu_opt_set(opts, "path", p);
2660 return opts;
2661 }
2662 if (strstart(filename, "pipe:", &p)) {
2663 qemu_opt_set(opts, "backend", "pipe");
2664 qemu_opt_set(opts, "path", p);
2665 return opts;
2666 }
2667 if (strstart(filename, "tcp:", &p) ||
2668 strstart(filename, "telnet:", &p)) {
2669 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2670 host[0] = 0;
2671 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2672 goto fail;
2673 }
2674 qemu_opt_set(opts, "backend", "socket");
2675 qemu_opt_set(opts, "host", host);
2676 qemu_opt_set(opts, "port", port);
2677 if (p[pos] == ',') {
2678 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2679 goto fail;
2680 }
2681 if (strstart(filename, "telnet:", &p))
2682 qemu_opt_set(opts, "telnet", "on");
2683 return opts;
2684 }
2685 if (strstart(filename, "udp:", &p)) {
2686 qemu_opt_set(opts, "backend", "udp");
2687 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2688 host[0] = 0;
2689 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2690 goto fail;
2691 }
2692 }
2693 qemu_opt_set(opts, "host", host);
2694 qemu_opt_set(opts, "port", port);
2695 if (p[pos] == '@') {
2696 p += pos + 1;
2697 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2698 host[0] = 0;
2699 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2700 goto fail;
2701 }
2702 }
2703 qemu_opt_set(opts, "localaddr", host);
2704 qemu_opt_set(opts, "localport", port);
2705 }
2706 return opts;
2707 }
2708 if (strstart(filename, "unix:", &p)) {
2709 qemu_opt_set(opts, "backend", "socket");
2710 if (qemu_opts_do_parse(opts, p, "path") != 0)
2711 goto fail;
2712 return opts;
2713 }
2714 if (strstart(filename, "/dev/parport", NULL) ||
2715 strstart(filename, "/dev/ppi", NULL)) {
2716 qemu_opt_set(opts, "backend", "parport");
2717 qemu_opt_set(opts, "path", filename);
2718 return opts;
2719 }
2720 if (strstart(filename, "/dev/", NULL)) {
2721 qemu_opt_set(opts, "backend", "tty");
2722 qemu_opt_set(opts, "path", filename);
2723 return opts;
2724 }
2725
2726 fail:
2727 qemu_opts_del(opts);
2728 return NULL;
2729 }
2730
2731 static const struct {
2732 const char *name;
2733 int (*open)(QemuOpts *opts, CharDriverState **chr);
2734 } backend_table[] = {
2735 { .name = "null", .open = qemu_chr_open_null },
2736 { .name = "socket", .open = qemu_chr_open_socket },
2737 { .name = "udp", .open = qemu_chr_open_udp },
2738 { .name = "msmouse", .open = qemu_chr_open_msmouse },
2739 { .name = "vc", .open = text_console_init },
2740 #ifdef _WIN32
2741 { .name = "file", .open = qemu_chr_open_win_file_out },
2742 { .name = "pipe", .open = qemu_chr_open_win_pipe },
2743 { .name = "console", .open = qemu_chr_open_win_con },
2744 { .name = "serial", .open = qemu_chr_open_win },
2745 { .name = "stdio", .open = qemu_chr_open_win_stdio },
2746 #else
2747 { .name = "file", .open = qemu_chr_open_file_out },
2748 { .name = "pipe", .open = qemu_chr_open_pipe },
2749 { .name = "pty", .open = qemu_chr_open_pty },
2750 { .name = "stdio", .open = qemu_chr_open_stdio },
2751 #endif
2752 #ifdef CONFIG_BRLAPI
2753 { .name = "braille", .open = chr_baum_init },
2754 #endif
2755 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2756 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
2757 || defined(__FreeBSD_kernel__)
2758 { .name = "tty", .open = qemu_chr_open_tty },
2759 #endif
2760 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
2761 || defined(__FreeBSD_kernel__)
2762 { .name = "parport", .open = qemu_chr_open_pp },
2763 #endif
2764 #ifdef CONFIG_SPICE
2765 { .name = "spicevmc", .open = qemu_chr_open_spice },
2766 #endif
2767 };
2768
2769 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
2770 void (*init)(struct CharDriverState *s))
2771 {
2772 CharDriverState *chr;
2773 int i;
2774 int ret;
2775
2776 if (qemu_opts_id(opts) == NULL) {
2777 fprintf(stderr, "chardev: no id specified\n");
2778 return NULL;
2779 }
2780
2781 if (qemu_opt_get(opts, "backend") == NULL) {
2782 fprintf(stderr, "chardev: \"%s\" missing backend\n",
2783 qemu_opts_id(opts));
2784 return NULL;
2785 }
2786 for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2787 if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2788 break;
2789 }
2790 if (i == ARRAY_SIZE(backend_table)) {
2791 fprintf(stderr, "chardev: backend \"%s\" not found\n",
2792 qemu_opt_get(opts, "backend"));
2793 return NULL;
2794 }
2795
2796 ret = backend_table[i].open(opts, &chr);
2797 if (ret < 0) {
2798 fprintf(stderr, "chardev: opening backend \"%s\" failed: %s\n",
2799 qemu_opt_get(opts, "backend"), strerror(-ret));
2800 return NULL;
2801 }
2802
2803 if (!chr->filename)
2804 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
2805 chr->init = init;
2806 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2807
2808 if (qemu_opt_get_bool(opts, "mux", 0)) {
2809 CharDriverState *base = chr;
2810 int len = strlen(qemu_opts_id(opts)) + 6;
2811 base->label = g_malloc(len);
2812 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
2813 chr = qemu_chr_open_mux(base);
2814 chr->filename = base->filename;
2815 chr->avail_connections = MAX_MUX;
2816 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2817 } else {
2818 chr->avail_connections = 1;
2819 }
2820 chr->label = g_strdup(qemu_opts_id(opts));
2821 return chr;
2822 }
2823
2824 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2825 {
2826 const char *p;
2827 CharDriverState *chr;
2828 QemuOpts *opts;
2829
2830 if (strstart(filename, "chardev:", &p)) {
2831 return qemu_chr_find(p);
2832 }
2833
2834 opts = qemu_chr_parse_compat(label, filename);
2835 if (!opts)
2836 return NULL;
2837
2838 chr = qemu_chr_new_from_opts(opts, init);
2839 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
2840 monitor_init(chr, MONITOR_USE_READLINE);
2841 }
2842 qemu_opts_del(opts);
2843 return chr;
2844 }
2845
2846 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
2847 {
2848 if (chr->chr_set_echo) {
2849 chr->chr_set_echo(chr, echo);
2850 }
2851 }
2852
2853 void qemu_chr_fe_open(struct CharDriverState *chr)
2854 {
2855 if (chr->chr_guest_open) {
2856 chr->chr_guest_open(chr);
2857 }
2858 }
2859
2860 void qemu_chr_fe_close(struct CharDriverState *chr)
2861 {
2862 if (chr->chr_guest_close) {
2863 chr->chr_guest_close(chr);
2864 }
2865 }
2866
2867 void qemu_chr_delete(CharDriverState *chr)
2868 {
2869 QTAILQ_REMOVE(&chardevs, chr, next);
2870 if (chr->chr_close)
2871 chr->chr_close(chr);
2872 g_free(chr->filename);
2873 g_free(chr->label);
2874 g_free(chr);
2875 }
2876
2877 ChardevInfoList *qmp_query_chardev(Error **errp)
2878 {
2879 ChardevInfoList *chr_list = NULL;
2880 CharDriverState *chr;
2881
2882 QTAILQ_FOREACH(chr, &chardevs, next) {
2883 ChardevInfoList *info = g_malloc0(sizeof(*info));
2884 info->value = g_malloc0(sizeof(*info->value));
2885 info->value->label = g_strdup(chr->label);
2886 info->value->filename = g_strdup(chr->filename);
2887
2888 info->next = chr_list;
2889 chr_list = info;
2890 }
2891
2892 return chr_list;
2893 }
2894
2895 CharDriverState *qemu_chr_find(const char *name)
2896 {
2897 CharDriverState *chr;
2898
2899 QTAILQ_FOREACH(chr, &chardevs, next) {
2900 if (strcmp(chr->label, name) != 0)
2901 continue;
2902 return chr;
2903 }
2904 return NULL;
2905 }
QEmu