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[qemu.git] / qemu-char.c
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu-common.h"
25 #include "monitor/monitor.h"
26 #include "ui/console.h"
27 #include "sysemu/sysemu.h"
28 #include "qemu/timer.h"
29 #include "char/char.h"
30 #include "hw/usb.h"
31 #include "hw/baum.h"
32 #include "hw/msmouse.h"
33 #include "qmp-commands.h"
34
35 #include <unistd.h>
36 #include <fcntl.h>
37 #include <time.h>
38 #include <errno.h>
39 #include <sys/time.h>
40 #include <zlib.h>
41
42 #ifndef _WIN32
43 #include <sys/times.h>
44 #include <sys/wait.h>
45 #include <termios.h>
46 #include <sys/mman.h>
47 #include <sys/ioctl.h>
48 #include <sys/resource.h>
49 #include <sys/socket.h>
50 #include <netinet/in.h>
51 #include <net/if.h>
52 #include <arpa/inet.h>
53 #include <dirent.h>
54 #include <netdb.h>
55 #include <sys/select.h>
56 #ifdef CONFIG_BSD
57 #include <sys/stat.h>
58 #if defined(__GLIBC__)
59 #include <pty.h>
60 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
61 #include <libutil.h>
62 #else
63 #include <util.h>
64 #endif
65 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
66 #include <dev/ppbus/ppi.h>
67 #include <dev/ppbus/ppbconf.h>
68 #elif defined(__DragonFly__)
69 #include <dev/misc/ppi/ppi.h>
70 #include <bus/ppbus/ppbconf.h>
71 #endif
72 #else
73 #ifdef __linux__
74 #include <pty.h>
75
76 #include <linux/ppdev.h>
77 #include <linux/parport.h>
78 #endif
79 #ifdef __sun__
80 #include <sys/stat.h>
81 #include <sys/ethernet.h>
82 #include <sys/sockio.h>
83 #include <netinet/arp.h>
84 #include <netinet/in.h>
85 #include <netinet/in_systm.h>
86 #include <netinet/ip.h>
87 #include <netinet/ip_icmp.h> // must come after ip.h
88 #include <netinet/udp.h>
89 #include <netinet/tcp.h>
90 #include <net/if.h>
91 #include <syslog.h>
92 #include <stropts.h>
93 #endif
94 #endif
95 #endif
96
97 #include "qemu/sockets.h"
98 #include "ui/qemu-spice.h"
99
100 #define READ_BUF_LEN 4096
101
102 /***********************************************************/
103 /* character device */
104
105 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
106 QTAILQ_HEAD_INITIALIZER(chardevs);
107
108 void qemu_chr_be_event(CharDriverState *s, int event)
109 {
110 /* Keep track if the char device is open */
111 switch (event) {
112 case CHR_EVENT_OPENED:
113 s->opened = 1;
114 break;
115 case CHR_EVENT_CLOSED:
116 s->opened = 0;
117 break;
118 }
119
120 if (!s->chr_event)
121 return;
122 s->chr_event(s->handler_opaque, event);
123 }
124
125 static void qemu_chr_fire_open_event(void *opaque)
126 {
127 CharDriverState *s = opaque;
128 qemu_chr_be_event(s, CHR_EVENT_OPENED);
129 qemu_free_timer(s->open_timer);
130 s->open_timer = NULL;
131 }
132
133 void qemu_chr_generic_open(CharDriverState *s)
134 {
135 if (s->open_timer == NULL) {
136 s->open_timer = qemu_new_timer_ms(rt_clock,
137 qemu_chr_fire_open_event, s);
138 qemu_mod_timer(s->open_timer, qemu_get_clock_ms(rt_clock) - 1);
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 if (s->chr_read) {
164 s->chr_read(s->handler_opaque, buf, len);
165 }
166 }
167
168 int qemu_chr_fe_get_msgfd(CharDriverState *s)
169 {
170 return s->get_msgfd ? s->get_msgfd(s) : -1;
171 }
172
173 int qemu_chr_add_client(CharDriverState *s, int fd)
174 {
175 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
176 }
177
178 void qemu_chr_accept_input(CharDriverState *s)
179 {
180 if (s->chr_accept_input)
181 s->chr_accept_input(s);
182 qemu_notify_event();
183 }
184
185 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
186 {
187 char buf[READ_BUF_LEN];
188 va_list ap;
189 va_start(ap, fmt);
190 vsnprintf(buf, sizeof(buf), fmt, ap);
191 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
192 va_end(ap);
193 }
194
195 void qemu_chr_add_handlers(CharDriverState *s,
196 IOCanReadHandler *fd_can_read,
197 IOReadHandler *fd_read,
198 IOEventHandler *fd_event,
199 void *opaque)
200 {
201 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
202 /* chr driver being released. */
203 ++s->avail_connections;
204 }
205 s->chr_can_read = fd_can_read;
206 s->chr_read = fd_read;
207 s->chr_event = fd_event;
208 s->handler_opaque = opaque;
209 if (s->chr_update_read_handler)
210 s->chr_update_read_handler(s);
211
212 /* We're connecting to an already opened device, so let's make sure we
213 also get the open event */
214 if (s->opened) {
215 qemu_chr_generic_open(s);
216 }
217 }
218
219 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
220 {
221 return len;
222 }
223
224 static CharDriverState *qemu_chr_open_null(QemuOpts *opts)
225 {
226 CharDriverState *chr;
227
228 chr = g_malloc0(sizeof(CharDriverState));
229 chr->chr_write = null_chr_write;
230 return chr;
231 }
232
233 /* MUX driver for serial I/O splitting */
234 #define MAX_MUX 4
235 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
236 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
237 typedef struct {
238 IOCanReadHandler *chr_can_read[MAX_MUX];
239 IOReadHandler *chr_read[MAX_MUX];
240 IOEventHandler *chr_event[MAX_MUX];
241 void *ext_opaque[MAX_MUX];
242 CharDriverState *drv;
243 int focus;
244 int mux_cnt;
245 int term_got_escape;
246 int max_size;
247 /* Intermediate input buffer allows to catch escape sequences even if the
248 currently active device is not accepting any input - but only until it
249 is full as well. */
250 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
251 int prod[MAX_MUX];
252 int cons[MAX_MUX];
253 int timestamps;
254 int linestart;
255 int64_t timestamps_start;
256 } MuxDriver;
257
258
259 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
260 {
261 MuxDriver *d = chr->opaque;
262 int ret;
263 if (!d->timestamps) {
264 ret = d->drv->chr_write(d->drv, buf, len);
265 } else {
266 int i;
267
268 ret = 0;
269 for (i = 0; i < len; i++) {
270 if (d->linestart) {
271 char buf1[64];
272 int64_t ti;
273 int secs;
274
275 ti = qemu_get_clock_ms(rt_clock);
276 if (d->timestamps_start == -1)
277 d->timestamps_start = ti;
278 ti -= d->timestamps_start;
279 secs = ti / 1000;
280 snprintf(buf1, sizeof(buf1),
281 "[%02d:%02d:%02d.%03d] ",
282 secs / 3600,
283 (secs / 60) % 60,
284 secs % 60,
285 (int)(ti % 1000));
286 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
287 d->linestart = 0;
288 }
289 ret += d->drv->chr_write(d->drv, buf+i, 1);
290 if (buf[i] == '\n') {
291 d->linestart = 1;
292 }
293 }
294 }
295 return ret;
296 }
297
298 static const char * const mux_help[] = {
299 "% h print this help\n\r",
300 "% x exit emulator\n\r",
301 "% s save disk data back to file (if -snapshot)\n\r",
302 "% t toggle console timestamps\n\r"
303 "% b send break (magic sysrq)\n\r",
304 "% c switch between console and monitor\n\r",
305 "% % sends %\n\r",
306 NULL
307 };
308
309 int term_escape_char = 0x01; /* ctrl-a is used for escape */
310 static void mux_print_help(CharDriverState *chr)
311 {
312 int i, j;
313 char ebuf[15] = "Escape-Char";
314 char cbuf[50] = "\n\r";
315
316 if (term_escape_char > 0 && term_escape_char < 26) {
317 snprintf(cbuf, sizeof(cbuf), "\n\r");
318 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
319 } else {
320 snprintf(cbuf, sizeof(cbuf),
321 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
322 term_escape_char);
323 }
324 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
325 for (i = 0; mux_help[i] != NULL; i++) {
326 for (j=0; mux_help[i][j] != '\0'; j++) {
327 if (mux_help[i][j] == '%')
328 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
329 else
330 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
331 }
332 }
333 }
334
335 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
336 {
337 if (d->chr_event[mux_nr])
338 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
339 }
340
341 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
342 {
343 if (d->term_got_escape) {
344 d->term_got_escape = 0;
345 if (ch == term_escape_char)
346 goto send_char;
347 switch(ch) {
348 case '?':
349 case 'h':
350 mux_print_help(chr);
351 break;
352 case 'x':
353 {
354 const char *term = "QEMU: Terminated\n\r";
355 chr->chr_write(chr,(uint8_t *)term,strlen(term));
356 exit(0);
357 break;
358 }
359 case 's':
360 bdrv_commit_all();
361 break;
362 case 'b':
363 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
364 break;
365 case 'c':
366 /* Switch to the next registered device */
367 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
368 d->focus++;
369 if (d->focus >= d->mux_cnt)
370 d->focus = 0;
371 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
372 break;
373 case 't':
374 d->timestamps = !d->timestamps;
375 d->timestamps_start = -1;
376 d->linestart = 0;
377 break;
378 }
379 } else if (ch == term_escape_char) {
380 d->term_got_escape = 1;
381 } else {
382 send_char:
383 return 1;
384 }
385 return 0;
386 }
387
388 static void mux_chr_accept_input(CharDriverState *chr)
389 {
390 MuxDriver *d = chr->opaque;
391 int m = d->focus;
392
393 while (d->prod[m] != d->cons[m] &&
394 d->chr_can_read[m] &&
395 d->chr_can_read[m](d->ext_opaque[m])) {
396 d->chr_read[m](d->ext_opaque[m],
397 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
398 }
399 }
400
401 static int mux_chr_can_read(void *opaque)
402 {
403 CharDriverState *chr = opaque;
404 MuxDriver *d = chr->opaque;
405 int m = d->focus;
406
407 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
408 return 1;
409 if (d->chr_can_read[m])
410 return d->chr_can_read[m](d->ext_opaque[m]);
411 return 0;
412 }
413
414 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
415 {
416 CharDriverState *chr = opaque;
417 MuxDriver *d = chr->opaque;
418 int m = d->focus;
419 int i;
420
421 mux_chr_accept_input (opaque);
422
423 for(i = 0; i < size; i++)
424 if (mux_proc_byte(chr, d, buf[i])) {
425 if (d->prod[m] == d->cons[m] &&
426 d->chr_can_read[m] &&
427 d->chr_can_read[m](d->ext_opaque[m]))
428 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
429 else
430 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
431 }
432 }
433
434 static void mux_chr_event(void *opaque, int event)
435 {
436 CharDriverState *chr = opaque;
437 MuxDriver *d = chr->opaque;
438 int i;
439
440 /* Send the event to all registered listeners */
441 for (i = 0; i < d->mux_cnt; i++)
442 mux_chr_send_event(d, i, event);
443 }
444
445 static void mux_chr_update_read_handler(CharDriverState *chr)
446 {
447 MuxDriver *d = chr->opaque;
448
449 if (d->mux_cnt >= MAX_MUX) {
450 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
451 return;
452 }
453 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
454 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
455 d->chr_read[d->mux_cnt] = chr->chr_read;
456 d->chr_event[d->mux_cnt] = chr->chr_event;
457 /* Fix up the real driver with mux routines */
458 if (d->mux_cnt == 0) {
459 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
460 mux_chr_event, chr);
461 }
462 if (d->focus != -1) {
463 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
464 }
465 d->focus = d->mux_cnt;
466 d->mux_cnt++;
467 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
468 }
469
470 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
471 {
472 CharDriverState *chr;
473 MuxDriver *d;
474
475 chr = g_malloc0(sizeof(CharDriverState));
476 d = g_malloc0(sizeof(MuxDriver));
477
478 chr->opaque = d;
479 d->drv = drv;
480 d->focus = -1;
481 chr->chr_write = mux_chr_write;
482 chr->chr_update_read_handler = mux_chr_update_read_handler;
483 chr->chr_accept_input = mux_chr_accept_input;
484 /* Frontend guest-open / -close notification is not support with muxes */
485 chr->chr_guest_open = NULL;
486 chr->chr_guest_close = NULL;
487
488 /* Muxes are always open on creation */
489 qemu_chr_generic_open(chr);
490
491 return chr;
492 }
493
494
495 #ifdef _WIN32
496 int send_all(int fd, const void *buf, int len1)
497 {
498 int ret, len;
499
500 len = len1;
501 while (len > 0) {
502 ret = send(fd, buf, len, 0);
503 if (ret < 0) {
504 errno = WSAGetLastError();
505 if (errno != WSAEWOULDBLOCK) {
506 return -1;
507 }
508 } else if (ret == 0) {
509 break;
510 } else {
511 buf += ret;
512 len -= ret;
513 }
514 }
515 return len1 - len;
516 }
517
518 #else
519
520 int send_all(int fd, const void *_buf, int len1)
521 {
522 int ret, len;
523 const uint8_t *buf = _buf;
524
525 len = len1;
526 while (len > 0) {
527 ret = write(fd, buf, len);
528 if (ret < 0) {
529 if (errno != EINTR && errno != EAGAIN)
530 return -1;
531 } else if (ret == 0) {
532 break;
533 } else {
534 buf += ret;
535 len -= ret;
536 }
537 }
538 return len1 - len;
539 }
540 #endif /* !_WIN32 */
541
542 #define STDIO_MAX_CLIENTS 1
543 static int stdio_nb_clients;
544
545 #ifndef _WIN32
546
547 typedef struct {
548 int fd_in, fd_out;
549 int max_size;
550 } FDCharDriver;
551
552
553 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
554 {
555 FDCharDriver *s = chr->opaque;
556 return send_all(s->fd_out, buf, len);
557 }
558
559 static int fd_chr_read_poll(void *opaque)
560 {
561 CharDriverState *chr = opaque;
562 FDCharDriver *s = chr->opaque;
563
564 s->max_size = qemu_chr_be_can_write(chr);
565 return s->max_size;
566 }
567
568 static void fd_chr_read(void *opaque)
569 {
570 CharDriverState *chr = opaque;
571 FDCharDriver *s = chr->opaque;
572 int size, len;
573 uint8_t buf[READ_BUF_LEN];
574
575 len = sizeof(buf);
576 if (len > s->max_size)
577 len = s->max_size;
578 if (len == 0)
579 return;
580 size = read(s->fd_in, buf, len);
581 if (size == 0) {
582 /* FD has been closed. Remove it from the active list. */
583 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
584 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
585 return;
586 }
587 if (size > 0) {
588 qemu_chr_be_write(chr, buf, size);
589 }
590 }
591
592 static void fd_chr_update_read_handler(CharDriverState *chr)
593 {
594 FDCharDriver *s = chr->opaque;
595
596 if (s->fd_in >= 0) {
597 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
598 } else {
599 qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
600 fd_chr_read, NULL, chr);
601 }
602 }
603 }
604
605 static void fd_chr_close(struct CharDriverState *chr)
606 {
607 FDCharDriver *s = chr->opaque;
608
609 if (s->fd_in >= 0) {
610 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
611 } else {
612 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
613 }
614 }
615
616 g_free(s);
617 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
618 }
619
620 /* open a character device to a unix fd */
621 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
622 {
623 CharDriverState *chr;
624 FDCharDriver *s;
625
626 chr = g_malloc0(sizeof(CharDriverState));
627 s = g_malloc0(sizeof(FDCharDriver));
628 s->fd_in = fd_in;
629 s->fd_out = fd_out;
630 chr->opaque = s;
631 chr->chr_write = fd_chr_write;
632 chr->chr_update_read_handler = fd_chr_update_read_handler;
633 chr->chr_close = fd_chr_close;
634
635 qemu_chr_generic_open(chr);
636
637 return chr;
638 }
639
640 static CharDriverState *qemu_chr_open_file_out(QemuOpts *opts)
641 {
642 int fd_out;
643
644 TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
645 O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
646 if (fd_out < 0) {
647 return NULL;
648 }
649 return qemu_chr_open_fd(-1, fd_out);
650 }
651
652 static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts)
653 {
654 int fd_in, fd_out;
655 char filename_in[256], filename_out[256];
656 const char *filename = qemu_opt_get(opts, "path");
657
658 if (filename == NULL) {
659 fprintf(stderr, "chardev: pipe: no filename given\n");
660 return NULL;
661 }
662
663 snprintf(filename_in, 256, "%s.in", filename);
664 snprintf(filename_out, 256, "%s.out", filename);
665 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
666 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
667 if (fd_in < 0 || fd_out < 0) {
668 if (fd_in >= 0)
669 close(fd_in);
670 if (fd_out >= 0)
671 close(fd_out);
672 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
673 if (fd_in < 0) {
674 return NULL;
675 }
676 }
677 return qemu_chr_open_fd(fd_in, fd_out);
678 }
679
680
681 /* for STDIO, we handle the case where several clients use it
682 (nographic mode) */
683
684 #define TERM_FIFO_MAX_SIZE 1
685
686 static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
687 static int term_fifo_size;
688
689 static int stdio_read_poll(void *opaque)
690 {
691 CharDriverState *chr = opaque;
692
693 /* try to flush the queue if needed */
694 if (term_fifo_size != 0 && qemu_chr_be_can_write(chr) > 0) {
695 qemu_chr_be_write(chr, term_fifo, 1);
696 term_fifo_size = 0;
697 }
698 /* see if we can absorb more chars */
699 if (term_fifo_size == 0)
700 return 1;
701 else
702 return 0;
703 }
704
705 static void stdio_read(void *opaque)
706 {
707 int size;
708 uint8_t buf[1];
709 CharDriverState *chr = opaque;
710
711 size = read(0, buf, 1);
712 if (size == 0) {
713 /* stdin has been closed. Remove it from the active list. */
714 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
715 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
716 return;
717 }
718 if (size > 0) {
719 if (qemu_chr_be_can_write(chr) > 0) {
720 qemu_chr_be_write(chr, buf, 1);
721 } else if (term_fifo_size == 0) {
722 term_fifo[term_fifo_size++] = buf[0];
723 }
724 }
725 }
726
727 /* init terminal so that we can grab keys */
728 static struct termios oldtty;
729 static int old_fd0_flags;
730 static bool stdio_allow_signal;
731
732 static void term_exit(void)
733 {
734 tcsetattr (0, TCSANOW, &oldtty);
735 fcntl(0, F_SETFL, old_fd0_flags);
736 }
737
738 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
739 {
740 struct termios tty;
741
742 tty = oldtty;
743 if (!echo) {
744 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
745 |INLCR|IGNCR|ICRNL|IXON);
746 tty.c_oflag |= OPOST;
747 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
748 tty.c_cflag &= ~(CSIZE|PARENB);
749 tty.c_cflag |= CS8;
750 tty.c_cc[VMIN] = 1;
751 tty.c_cc[VTIME] = 0;
752 }
753 /* if graphical mode, we allow Ctrl-C handling */
754 if (!stdio_allow_signal)
755 tty.c_lflag &= ~ISIG;
756
757 tcsetattr (0, TCSANOW, &tty);
758 }
759
760 static void qemu_chr_close_stdio(struct CharDriverState *chr)
761 {
762 term_exit();
763 stdio_nb_clients--;
764 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
765 fd_chr_close(chr);
766 }
767
768 static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts)
769 {
770 CharDriverState *chr;
771
772 if (stdio_nb_clients >= STDIO_MAX_CLIENTS) {
773 return NULL;
774 }
775 if (is_daemonized()) {
776 error_report("cannot use stdio with -daemonize");
777 return NULL;
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 return chr;
796 }
797
798 #ifdef __sun__
799 /* Once Solaris has openpty(), this is going to be removed. */
800 static int openpty(int *amaster, int *aslave, char *name,
801 struct termios *termp, struct winsize *winp)
802 {
803 const char *slave;
804 int mfd = -1, sfd = -1;
805
806 *amaster = *aslave = -1;
807
808 mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
809 if (mfd < 0)
810 goto err;
811
812 if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
813 goto err;
814
815 if ((slave = ptsname(mfd)) == NULL)
816 goto err;
817
818 if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
819 goto err;
820
821 if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
822 (termp != NULL && tcgetattr(sfd, termp) < 0))
823 goto err;
824
825 if (amaster)
826 *amaster = mfd;
827 if (aslave)
828 *aslave = sfd;
829 if (winp)
830 ioctl(sfd, TIOCSWINSZ, winp);
831
832 return 0;
833
834 err:
835 if (sfd != -1)
836 close(sfd);
837 close(mfd);
838 return -1;
839 }
840
841 static void cfmakeraw (struct termios *termios_p)
842 {
843 termios_p->c_iflag &=
844 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
845 termios_p->c_oflag &= ~OPOST;
846 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
847 termios_p->c_cflag &= ~(CSIZE|PARENB);
848 termios_p->c_cflag |= CS8;
849
850 termios_p->c_cc[VMIN] = 0;
851 termios_p->c_cc[VTIME] = 0;
852 }
853 #endif
854
855 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
856 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
857 || defined(__GLIBC__)
858
859 typedef struct {
860 int fd;
861 int connected;
862 int polling;
863 int read_bytes;
864 QEMUTimer *timer;
865 } PtyCharDriver;
866
867 static void pty_chr_update_read_handler(CharDriverState *chr);
868 static void pty_chr_state(CharDriverState *chr, int connected);
869
870 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
871 {
872 PtyCharDriver *s = chr->opaque;
873
874 if (!s->connected) {
875 /* guest sends data, check for (re-)connect */
876 pty_chr_update_read_handler(chr);
877 return 0;
878 }
879 return send_all(s->fd, buf, len);
880 }
881
882 static int pty_chr_read_poll(void *opaque)
883 {
884 CharDriverState *chr = opaque;
885 PtyCharDriver *s = chr->opaque;
886
887 s->read_bytes = qemu_chr_be_can_write(chr);
888 return s->read_bytes;
889 }
890
891 static void pty_chr_read(void *opaque)
892 {
893 CharDriverState *chr = opaque;
894 PtyCharDriver *s = chr->opaque;
895 int size, len;
896 uint8_t buf[READ_BUF_LEN];
897
898 len = sizeof(buf);
899 if (len > s->read_bytes)
900 len = s->read_bytes;
901 if (len == 0)
902 return;
903 size = read(s->fd, buf, len);
904 if ((size == -1 && errno == EIO) ||
905 (size == 0)) {
906 pty_chr_state(chr, 0);
907 return;
908 }
909 if (size > 0) {
910 pty_chr_state(chr, 1);
911 qemu_chr_be_write(chr, buf, size);
912 }
913 }
914
915 static void pty_chr_update_read_handler(CharDriverState *chr)
916 {
917 PtyCharDriver *s = chr->opaque;
918
919 qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
920 pty_chr_read, NULL, chr);
921 s->polling = 1;
922 /*
923 * Short timeout here: just need wait long enougth that qemu makes
924 * it through the poll loop once. When reconnected we want a
925 * short timeout so we notice it almost instantly. Otherwise
926 * read() gives us -EIO instantly, making pty_chr_state() reset the
927 * timeout to the normal (much longer) poll interval before the
928 * timer triggers.
929 */
930 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 10);
931 }
932
933 static void pty_chr_state(CharDriverState *chr, int connected)
934 {
935 PtyCharDriver *s = chr->opaque;
936
937 if (!connected) {
938 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
939 s->connected = 0;
940 s->polling = 0;
941 /* (re-)connect poll interval for idle guests: once per second.
942 * We check more frequently in case the guests sends data to
943 * the virtual device linked to our pty. */
944 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 1000);
945 } else {
946 if (!s->connected)
947 qemu_chr_generic_open(chr);
948 s->connected = 1;
949 }
950 }
951
952 static void pty_chr_timer(void *opaque)
953 {
954 struct CharDriverState *chr = opaque;
955 PtyCharDriver *s = chr->opaque;
956
957 if (s->connected)
958 return;
959 if (s->polling) {
960 /* If we arrive here without polling being cleared due
961 * read returning -EIO, then we are (re-)connected */
962 pty_chr_state(chr, 1);
963 return;
964 }
965
966 /* Next poll ... */
967 pty_chr_update_read_handler(chr);
968 }
969
970 static void pty_chr_close(struct CharDriverState *chr)
971 {
972 PtyCharDriver *s = chr->opaque;
973
974 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
975 close(s->fd);
976 qemu_del_timer(s->timer);
977 qemu_free_timer(s->timer);
978 g_free(s);
979 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
980 }
981
982 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
983 {
984 CharDriverState *chr;
985 PtyCharDriver *s;
986 struct termios tty;
987 const char *label;
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 NULL;
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
1014 label = qemu_opts_id(opts);
1015 fprintf(stderr, "char device redirected to %s%s%s%s\n",
1016 q_ptsname(master_fd),
1017 label ? " (label " : "",
1018 label ? label : "",
1019 label ? ")" : "");
1020
1021 s = g_malloc0(sizeof(PtyCharDriver));
1022 chr->opaque = s;
1023 chr->chr_write = pty_chr_write;
1024 chr->chr_update_read_handler = pty_chr_update_read_handler;
1025 chr->chr_close = pty_chr_close;
1026
1027 s->fd = master_fd;
1028 s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr);
1029
1030 return chr;
1031 }
1032
1033 static void tty_serial_init(int fd, int speed,
1034 int parity, int data_bits, int stop_bits)
1035 {
1036 struct termios tty;
1037 speed_t spd;
1038
1039 #if 0
1040 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1041 speed, parity, data_bits, stop_bits);
1042 #endif
1043 tcgetattr (fd, &tty);
1044
1045 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1046 speed = speed * 10 / 11;
1047 do {
1048 check_speed(50);
1049 check_speed(75);
1050 check_speed(110);
1051 check_speed(134);
1052 check_speed(150);
1053 check_speed(200);
1054 check_speed(300);
1055 check_speed(600);
1056 check_speed(1200);
1057 check_speed(1800);
1058 check_speed(2400);
1059 check_speed(4800);
1060 check_speed(9600);
1061 check_speed(19200);
1062 check_speed(38400);
1063 /* Non-Posix values follow. They may be unsupported on some systems. */
1064 check_speed(57600);
1065 check_speed(115200);
1066 #ifdef B230400
1067 check_speed(230400);
1068 #endif
1069 #ifdef B460800
1070 check_speed(460800);
1071 #endif
1072 #ifdef B500000
1073 check_speed(500000);
1074 #endif
1075 #ifdef B576000
1076 check_speed(576000);
1077 #endif
1078 #ifdef B921600
1079 check_speed(921600);
1080 #endif
1081 #ifdef B1000000
1082 check_speed(1000000);
1083 #endif
1084 #ifdef B1152000
1085 check_speed(1152000);
1086 #endif
1087 #ifdef B1500000
1088 check_speed(1500000);
1089 #endif
1090 #ifdef B2000000
1091 check_speed(2000000);
1092 #endif
1093 #ifdef B2500000
1094 check_speed(2500000);
1095 #endif
1096 #ifdef B3000000
1097 check_speed(3000000);
1098 #endif
1099 #ifdef B3500000
1100 check_speed(3500000);
1101 #endif
1102 #ifdef B4000000
1103 check_speed(4000000);
1104 #endif
1105 spd = B115200;
1106 } while (0);
1107
1108 cfsetispeed(&tty, spd);
1109 cfsetospeed(&tty, spd);
1110
1111 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1112 |INLCR|IGNCR|ICRNL|IXON);
1113 tty.c_oflag |= OPOST;
1114 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1115 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1116 switch(data_bits) {
1117 default:
1118 case 8:
1119 tty.c_cflag |= CS8;
1120 break;
1121 case 7:
1122 tty.c_cflag |= CS7;
1123 break;
1124 case 6:
1125 tty.c_cflag |= CS6;
1126 break;
1127 case 5:
1128 tty.c_cflag |= CS5;
1129 break;
1130 }
1131 switch(parity) {
1132 default:
1133 case 'N':
1134 break;
1135 case 'E':
1136 tty.c_cflag |= PARENB;
1137 break;
1138 case 'O':
1139 tty.c_cflag |= PARENB | PARODD;
1140 break;
1141 }
1142 if (stop_bits == 2)
1143 tty.c_cflag |= CSTOPB;
1144
1145 tcsetattr (fd, TCSANOW, &tty);
1146 }
1147
1148 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1149 {
1150 FDCharDriver *s = chr->opaque;
1151
1152 switch(cmd) {
1153 case CHR_IOCTL_SERIAL_SET_PARAMS:
1154 {
1155 QEMUSerialSetParams *ssp = arg;
1156 tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1157 ssp->data_bits, ssp->stop_bits);
1158 }
1159 break;
1160 case CHR_IOCTL_SERIAL_SET_BREAK:
1161 {
1162 int enable = *(int *)arg;
1163 if (enable)
1164 tcsendbreak(s->fd_in, 1);
1165 }
1166 break;
1167 case CHR_IOCTL_SERIAL_GET_TIOCM:
1168 {
1169 int sarg = 0;
1170 int *targ = (int *)arg;
1171 ioctl(s->fd_in, TIOCMGET, &sarg);
1172 *targ = 0;
1173 if (sarg & TIOCM_CTS)
1174 *targ |= CHR_TIOCM_CTS;
1175 if (sarg & TIOCM_CAR)
1176 *targ |= CHR_TIOCM_CAR;
1177 if (sarg & TIOCM_DSR)
1178 *targ |= CHR_TIOCM_DSR;
1179 if (sarg & TIOCM_RI)
1180 *targ |= CHR_TIOCM_RI;
1181 if (sarg & TIOCM_DTR)
1182 *targ |= CHR_TIOCM_DTR;
1183 if (sarg & TIOCM_RTS)
1184 *targ |= CHR_TIOCM_RTS;
1185 }
1186 break;
1187 case CHR_IOCTL_SERIAL_SET_TIOCM:
1188 {
1189 int sarg = *(int *)arg;
1190 int targ = 0;
1191 ioctl(s->fd_in, TIOCMGET, &targ);
1192 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1193 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1194 if (sarg & CHR_TIOCM_CTS)
1195 targ |= TIOCM_CTS;
1196 if (sarg & CHR_TIOCM_CAR)
1197 targ |= TIOCM_CAR;
1198 if (sarg & CHR_TIOCM_DSR)
1199 targ |= TIOCM_DSR;
1200 if (sarg & CHR_TIOCM_RI)
1201 targ |= TIOCM_RI;
1202 if (sarg & CHR_TIOCM_DTR)
1203 targ |= TIOCM_DTR;
1204 if (sarg & CHR_TIOCM_RTS)
1205 targ |= TIOCM_RTS;
1206 ioctl(s->fd_in, TIOCMSET, &targ);
1207 }
1208 break;
1209 default:
1210 return -ENOTSUP;
1211 }
1212 return 0;
1213 }
1214
1215 static void qemu_chr_close_tty(CharDriverState *chr)
1216 {
1217 FDCharDriver *s = chr->opaque;
1218 int fd = -1;
1219
1220 if (s) {
1221 fd = s->fd_in;
1222 }
1223
1224 fd_chr_close(chr);
1225
1226 if (fd >= 0) {
1227 close(fd);
1228 }
1229 }
1230
1231 static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
1232 {
1233 const char *filename = qemu_opt_get(opts, "path");
1234 CharDriverState *chr;
1235 int fd;
1236
1237 TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK));
1238 if (fd < 0) {
1239 return NULL;
1240 }
1241 tty_serial_init(fd, 115200, 'N', 8, 1);
1242 chr = qemu_chr_open_fd(fd, fd);
1243 chr->chr_ioctl = tty_serial_ioctl;
1244 chr->chr_close = qemu_chr_close_tty;
1245 return chr;
1246 }
1247 #else /* ! __linux__ && ! __sun__ */
1248 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
1249 {
1250 return NULL;
1251 }
1252 #endif /* __linux__ || __sun__ */
1253
1254 #if defined(__linux__)
1255 typedef struct {
1256 int fd;
1257 int mode;
1258 } ParallelCharDriver;
1259
1260 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1261 {
1262 if (s->mode != mode) {
1263 int m = mode;
1264 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1265 return 0;
1266 s->mode = mode;
1267 }
1268 return 1;
1269 }
1270
1271 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1272 {
1273 ParallelCharDriver *drv = chr->opaque;
1274 int fd = drv->fd;
1275 uint8_t b;
1276
1277 switch(cmd) {
1278 case CHR_IOCTL_PP_READ_DATA:
1279 if (ioctl(fd, PPRDATA, &b) < 0)
1280 return -ENOTSUP;
1281 *(uint8_t *)arg = b;
1282 break;
1283 case CHR_IOCTL_PP_WRITE_DATA:
1284 b = *(uint8_t *)arg;
1285 if (ioctl(fd, PPWDATA, &b) < 0)
1286 return -ENOTSUP;
1287 break;
1288 case CHR_IOCTL_PP_READ_CONTROL:
1289 if (ioctl(fd, PPRCONTROL, &b) < 0)
1290 return -ENOTSUP;
1291 /* Linux gives only the lowest bits, and no way to know data
1292 direction! For better compatibility set the fixed upper
1293 bits. */
1294 *(uint8_t *)arg = b | 0xc0;
1295 break;
1296 case CHR_IOCTL_PP_WRITE_CONTROL:
1297 b = *(uint8_t *)arg;
1298 if (ioctl(fd, PPWCONTROL, &b) < 0)
1299 return -ENOTSUP;
1300 break;
1301 case CHR_IOCTL_PP_READ_STATUS:
1302 if (ioctl(fd, PPRSTATUS, &b) < 0)
1303 return -ENOTSUP;
1304 *(uint8_t *)arg = b;
1305 break;
1306 case CHR_IOCTL_PP_DATA_DIR:
1307 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1308 return -ENOTSUP;
1309 break;
1310 case CHR_IOCTL_PP_EPP_READ_ADDR:
1311 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1312 struct ParallelIOArg *parg = arg;
1313 int n = read(fd, parg->buffer, parg->count);
1314 if (n != parg->count) {
1315 return -EIO;
1316 }
1317 }
1318 break;
1319 case CHR_IOCTL_PP_EPP_READ:
1320 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1321 struct ParallelIOArg *parg = arg;
1322 int n = read(fd, parg->buffer, parg->count);
1323 if (n != parg->count) {
1324 return -EIO;
1325 }
1326 }
1327 break;
1328 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1329 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1330 struct ParallelIOArg *parg = arg;
1331 int n = write(fd, parg->buffer, parg->count);
1332 if (n != parg->count) {
1333 return -EIO;
1334 }
1335 }
1336 break;
1337 case CHR_IOCTL_PP_EPP_WRITE:
1338 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1339 struct ParallelIOArg *parg = arg;
1340 int n = write(fd, parg->buffer, parg->count);
1341 if (n != parg->count) {
1342 return -EIO;
1343 }
1344 }
1345 break;
1346 default:
1347 return -ENOTSUP;
1348 }
1349 return 0;
1350 }
1351
1352 static void pp_close(CharDriverState *chr)
1353 {
1354 ParallelCharDriver *drv = chr->opaque;
1355 int fd = drv->fd;
1356
1357 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1358 ioctl(fd, PPRELEASE);
1359 close(fd);
1360 g_free(drv);
1361 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1362 }
1363
1364 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1365 {
1366 const char *filename = qemu_opt_get(opts, "path");
1367 CharDriverState *chr;
1368 ParallelCharDriver *drv;
1369 int fd;
1370
1371 TFR(fd = qemu_open(filename, O_RDWR));
1372 if (fd < 0) {
1373 return NULL;
1374 }
1375
1376 if (ioctl(fd, PPCLAIM) < 0) {
1377 close(fd);
1378 return NULL;
1379 }
1380
1381 drv = g_malloc0(sizeof(ParallelCharDriver));
1382 drv->fd = fd;
1383 drv->mode = IEEE1284_MODE_COMPAT;
1384
1385 chr = g_malloc0(sizeof(CharDriverState));
1386 chr->chr_write = null_chr_write;
1387 chr->chr_ioctl = pp_ioctl;
1388 chr->chr_close = pp_close;
1389 chr->opaque = drv;
1390
1391 qemu_chr_generic_open(chr);
1392
1393 return chr;
1394 }
1395 #endif /* __linux__ */
1396
1397 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1398 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1399 {
1400 int fd = (int)(intptr_t)chr->opaque;
1401 uint8_t b;
1402
1403 switch(cmd) {
1404 case CHR_IOCTL_PP_READ_DATA:
1405 if (ioctl(fd, PPIGDATA, &b) < 0)
1406 return -ENOTSUP;
1407 *(uint8_t *)arg = b;
1408 break;
1409 case CHR_IOCTL_PP_WRITE_DATA:
1410 b = *(uint8_t *)arg;
1411 if (ioctl(fd, PPISDATA, &b) < 0)
1412 return -ENOTSUP;
1413 break;
1414 case CHR_IOCTL_PP_READ_CONTROL:
1415 if (ioctl(fd, PPIGCTRL, &b) < 0)
1416 return -ENOTSUP;
1417 *(uint8_t *)arg = b;
1418 break;
1419 case CHR_IOCTL_PP_WRITE_CONTROL:
1420 b = *(uint8_t *)arg;
1421 if (ioctl(fd, PPISCTRL, &b) < 0)
1422 return -ENOTSUP;
1423 break;
1424 case CHR_IOCTL_PP_READ_STATUS:
1425 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1426 return -ENOTSUP;
1427 *(uint8_t *)arg = b;
1428 break;
1429 default:
1430 return -ENOTSUP;
1431 }
1432 return 0;
1433 }
1434
1435 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1436 {
1437 const char *filename = qemu_opt_get(opts, "path");
1438 CharDriverState *chr;
1439 int fd;
1440
1441 fd = qemu_open(filename, O_RDWR);
1442 if (fd < 0) {
1443 return NULL;
1444 }
1445
1446 chr = g_malloc0(sizeof(CharDriverState));
1447 chr->opaque = (void *)(intptr_t)fd;
1448 chr->chr_write = null_chr_write;
1449 chr->chr_ioctl = pp_ioctl;
1450 return chr;
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_be_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 CharDriverState *qemu_chr_open_win(QemuOpts *opts)
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 NULL;
1682 }
1683 qemu_chr_generic_open(chr);
1684 return chr;
1685 }
1686
1687 static int win_chr_pipe_poll(void *opaque)
1688 {
1689 CharDriverState *chr = opaque;
1690 WinCharState *s = chr->opaque;
1691 DWORD size;
1692
1693 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1694 if (size > 0) {
1695 s->len = size;
1696 win_chr_read_poll(chr);
1697 win_chr_read(chr);
1698 return 1;
1699 }
1700 return 0;
1701 }
1702
1703 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1704 {
1705 WinCharState *s = chr->opaque;
1706 OVERLAPPED ov;
1707 int ret;
1708 DWORD size;
1709 char openname[256];
1710
1711 s->fpipe = TRUE;
1712
1713 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1714 if (!s->hsend) {
1715 fprintf(stderr, "Failed CreateEvent\n");
1716 goto fail;
1717 }
1718 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1719 if (!s->hrecv) {
1720 fprintf(stderr, "Failed CreateEvent\n");
1721 goto fail;
1722 }
1723
1724 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1725 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1726 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1727 PIPE_WAIT,
1728 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1729 if (s->hcom == INVALID_HANDLE_VALUE) {
1730 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1731 s->hcom = NULL;
1732 goto fail;
1733 }
1734
1735 ZeroMemory(&ov, sizeof(ov));
1736 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1737 ret = ConnectNamedPipe(s->hcom, &ov);
1738 if (ret) {
1739 fprintf(stderr, "Failed ConnectNamedPipe\n");
1740 goto fail;
1741 }
1742
1743 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1744 if (!ret) {
1745 fprintf(stderr, "Failed GetOverlappedResult\n");
1746 if (ov.hEvent) {
1747 CloseHandle(ov.hEvent);
1748 ov.hEvent = NULL;
1749 }
1750 goto fail;
1751 }
1752
1753 if (ov.hEvent) {
1754 CloseHandle(ov.hEvent);
1755 ov.hEvent = NULL;
1756 }
1757 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1758 return 0;
1759
1760 fail:
1761 win_chr_close(chr);
1762 return -1;
1763 }
1764
1765
1766 static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts)
1767 {
1768 const char *filename = qemu_opt_get(opts, "path");
1769 CharDriverState *chr;
1770 WinCharState *s;
1771
1772 chr = g_malloc0(sizeof(CharDriverState));
1773 s = g_malloc0(sizeof(WinCharState));
1774 chr->opaque = s;
1775 chr->chr_write = win_chr_write;
1776 chr->chr_close = win_chr_close;
1777
1778 if (win_chr_pipe_init(chr, filename) < 0) {
1779 g_free(s);
1780 g_free(chr);
1781 return NULL;
1782 }
1783 qemu_chr_generic_open(chr);
1784 return chr;
1785 }
1786
1787 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1788 {
1789 CharDriverState *chr;
1790 WinCharState *s;
1791
1792 chr = g_malloc0(sizeof(CharDriverState));
1793 s = g_malloc0(sizeof(WinCharState));
1794 s->hcom = fd_out;
1795 chr->opaque = s;
1796 chr->chr_write = win_chr_write;
1797 qemu_chr_generic_open(chr);
1798 return chr;
1799 }
1800
1801 static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts)
1802 {
1803 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1804 }
1805
1806 static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts)
1807 {
1808 const char *file_out = qemu_opt_get(opts, "path");
1809 HANDLE fd_out;
1810
1811 fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1812 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1813 if (fd_out == INVALID_HANDLE_VALUE) {
1814 return NULL;
1815 }
1816
1817 return qemu_chr_open_win_file(fd_out);
1818 }
1819
1820 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1821 {
1822 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1823 DWORD dwSize;
1824 int len1;
1825
1826 len1 = len;
1827
1828 while (len1 > 0) {
1829 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1830 break;
1831 }
1832 buf += dwSize;
1833 len1 -= dwSize;
1834 }
1835
1836 return len - len1;
1837 }
1838
1839 static void win_stdio_wait_func(void *opaque)
1840 {
1841 CharDriverState *chr = opaque;
1842 WinStdioCharState *stdio = chr->opaque;
1843 INPUT_RECORD buf[4];
1844 int ret;
1845 DWORD dwSize;
1846 int i;
1847
1848 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
1849 &dwSize);
1850
1851 if (!ret) {
1852 /* Avoid error storm */
1853 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
1854 return;
1855 }
1856
1857 for (i = 0; i < dwSize; i++) {
1858 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
1859
1860 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
1861 int j;
1862 if (kev->uChar.AsciiChar != 0) {
1863 for (j = 0; j < kev->wRepeatCount; j++) {
1864 if (qemu_chr_be_can_write(chr)) {
1865 uint8_t c = kev->uChar.AsciiChar;
1866 qemu_chr_be_write(chr, &c, 1);
1867 }
1868 }
1869 }
1870 }
1871 }
1872 }
1873
1874 static DWORD WINAPI win_stdio_thread(LPVOID param)
1875 {
1876 CharDriverState *chr = param;
1877 WinStdioCharState *stdio = chr->opaque;
1878 int ret;
1879 DWORD dwSize;
1880
1881 while (1) {
1882
1883 /* Wait for one byte */
1884 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
1885
1886 /* Exit in case of error, continue if nothing read */
1887 if (!ret) {
1888 break;
1889 }
1890 if (!dwSize) {
1891 continue;
1892 }
1893
1894 /* Some terminal emulator returns \r\n for Enter, just pass \n */
1895 if (stdio->win_stdio_buf == '\r') {
1896 continue;
1897 }
1898
1899 /* Signal the main thread and wait until the byte was eaten */
1900 if (!SetEvent(stdio->hInputReadyEvent)) {
1901 break;
1902 }
1903 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
1904 != WAIT_OBJECT_0) {
1905 break;
1906 }
1907 }
1908
1909 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
1910 return 0;
1911 }
1912
1913 static void win_stdio_thread_wait_func(void *opaque)
1914 {
1915 CharDriverState *chr = opaque;
1916 WinStdioCharState *stdio = chr->opaque;
1917
1918 if (qemu_chr_be_can_write(chr)) {
1919 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
1920 }
1921
1922 SetEvent(stdio->hInputDoneEvent);
1923 }
1924
1925 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
1926 {
1927 WinStdioCharState *stdio = chr->opaque;
1928 DWORD dwMode = 0;
1929
1930 GetConsoleMode(stdio->hStdIn, &dwMode);
1931
1932 if (echo) {
1933 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
1934 } else {
1935 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
1936 }
1937 }
1938
1939 static void win_stdio_close(CharDriverState *chr)
1940 {
1941 WinStdioCharState *stdio = chr->opaque;
1942
1943 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
1944 CloseHandle(stdio->hInputReadyEvent);
1945 }
1946 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
1947 CloseHandle(stdio->hInputDoneEvent);
1948 }
1949 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
1950 TerminateThread(stdio->hInputThread, 0);
1951 }
1952
1953 g_free(chr->opaque);
1954 g_free(chr);
1955 stdio_nb_clients--;
1956 }
1957
1958 static CharDriverState *qemu_chr_open_win_stdio(QemuOpts *opts)
1959 {
1960 CharDriverState *chr;
1961 WinStdioCharState *stdio;
1962 DWORD dwMode;
1963 int is_console = 0;
1964
1965 if (stdio_nb_clients >= STDIO_MAX_CLIENTS
1966 || ((display_type != DT_NOGRAPHIC) && (stdio_nb_clients != 0))) {
1967 return NULL;
1968 }
1969
1970 chr = g_malloc0(sizeof(CharDriverState));
1971 stdio = g_malloc0(sizeof(WinStdioCharState));
1972
1973 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
1974 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
1975 fprintf(stderr, "cannot open stdio: invalid handle\n");
1976 exit(1);
1977 }
1978
1979 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
1980
1981 chr->opaque = stdio;
1982 chr->chr_write = win_stdio_write;
1983 chr->chr_close = win_stdio_close;
1984
1985 if (stdio_nb_clients == 0) {
1986 if (is_console) {
1987 if (qemu_add_wait_object(stdio->hStdIn,
1988 win_stdio_wait_func, chr)) {
1989 fprintf(stderr, "qemu_add_wait_object: failed\n");
1990 }
1991 } else {
1992 DWORD dwId;
1993
1994 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
1995 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
1996 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
1997 chr, 0, &dwId);
1998
1999 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2000 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2001 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2002 fprintf(stderr, "cannot create stdio thread or event\n");
2003 exit(1);
2004 }
2005 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2006 win_stdio_thread_wait_func, chr)) {
2007 fprintf(stderr, "qemu_add_wait_object: failed\n");
2008 }
2009 }
2010 }
2011
2012 dwMode |= ENABLE_LINE_INPUT;
2013
2014 stdio_clients[stdio_nb_clients++] = chr;
2015 if (stdio_nb_clients == 1 && is_console) {
2016 /* set the terminal in raw mode */
2017 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2018 dwMode |= ENABLE_PROCESSED_INPUT;
2019 }
2020
2021 SetConsoleMode(stdio->hStdIn, dwMode);
2022
2023 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2024 qemu_chr_fe_set_echo(chr, false);
2025
2026 return chr;
2027 }
2028 #endif /* !_WIN32 */
2029
2030 /***********************************************************/
2031 /* UDP Net console */
2032
2033 typedef struct {
2034 int fd;
2035 uint8_t buf[READ_BUF_LEN];
2036 int bufcnt;
2037 int bufptr;
2038 int max_size;
2039 } NetCharDriver;
2040
2041 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2042 {
2043 NetCharDriver *s = chr->opaque;
2044
2045 return send(s->fd, (const void *)buf, len, 0);
2046 }
2047
2048 static int udp_chr_read_poll(void *opaque)
2049 {
2050 CharDriverState *chr = opaque;
2051 NetCharDriver *s = chr->opaque;
2052
2053 s->max_size = qemu_chr_be_can_write(chr);
2054
2055 /* If there were any stray characters in the queue process them
2056 * first
2057 */
2058 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2059 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2060 s->bufptr++;
2061 s->max_size = qemu_chr_be_can_write(chr);
2062 }
2063 return s->max_size;
2064 }
2065
2066 static void udp_chr_read(void *opaque)
2067 {
2068 CharDriverState *chr = opaque;
2069 NetCharDriver *s = chr->opaque;
2070
2071 if (s->max_size == 0)
2072 return;
2073 s->bufcnt = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0);
2074 s->bufptr = s->bufcnt;
2075 if (s->bufcnt <= 0)
2076 return;
2077
2078 s->bufptr = 0;
2079 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2080 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2081 s->bufptr++;
2082 s->max_size = qemu_chr_be_can_write(chr);
2083 }
2084 }
2085
2086 static void udp_chr_update_read_handler(CharDriverState *chr)
2087 {
2088 NetCharDriver *s = chr->opaque;
2089
2090 if (s->fd >= 0) {
2091 qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
2092 udp_chr_read, NULL, chr);
2093 }
2094 }
2095
2096 static void udp_chr_close(CharDriverState *chr)
2097 {
2098 NetCharDriver *s = chr->opaque;
2099 if (s->fd >= 0) {
2100 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2101 closesocket(s->fd);
2102 }
2103 g_free(s);
2104 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2105 }
2106
2107 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2108 {
2109 CharDriverState *chr = NULL;
2110 NetCharDriver *s = NULL;
2111 Error *local_err = NULL;
2112 int fd = -1;
2113
2114 chr = g_malloc0(sizeof(CharDriverState));
2115 s = g_malloc0(sizeof(NetCharDriver));
2116
2117 fd = inet_dgram_opts(opts, &local_err);
2118 if (fd < 0) {
2119 goto return_err;
2120 }
2121
2122 s->fd = fd;
2123 s->bufcnt = 0;
2124 s->bufptr = 0;
2125 chr->opaque = s;
2126 chr->chr_write = udp_chr_write;
2127 chr->chr_update_read_handler = udp_chr_update_read_handler;
2128 chr->chr_close = udp_chr_close;
2129 return chr;
2130
2131 return_err:
2132 if (local_err) {
2133 qerror_report_err(local_err);
2134 error_free(local_err);
2135 }
2136 g_free(chr);
2137 g_free(s);
2138 if (fd >= 0) {
2139 closesocket(fd);
2140 }
2141 return NULL;
2142 }
2143
2144 /***********************************************************/
2145 /* TCP Net console */
2146
2147 typedef struct {
2148 int fd, listen_fd;
2149 int connected;
2150 int max_size;
2151 int do_telnetopt;
2152 int do_nodelay;
2153 int is_unix;
2154 int msgfd;
2155 } TCPCharDriver;
2156
2157 static void tcp_chr_accept(void *opaque);
2158
2159 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2160 {
2161 TCPCharDriver *s = chr->opaque;
2162 if (s->connected) {
2163 return send_all(s->fd, buf, len);
2164 } else {
2165 /* XXX: indicate an error ? */
2166 return len;
2167 }
2168 }
2169
2170 static int tcp_chr_read_poll(void *opaque)
2171 {
2172 CharDriverState *chr = opaque;
2173 TCPCharDriver *s = chr->opaque;
2174 if (!s->connected)
2175 return 0;
2176 s->max_size = qemu_chr_be_can_write(chr);
2177 return s->max_size;
2178 }
2179
2180 #define IAC 255
2181 #define IAC_BREAK 243
2182 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2183 TCPCharDriver *s,
2184 uint8_t *buf, int *size)
2185 {
2186 /* Handle any telnet client's basic IAC options to satisfy char by
2187 * char mode with no echo. All IAC options will be removed from
2188 * the buf and the do_telnetopt variable will be used to track the
2189 * state of the width of the IAC information.
2190 *
2191 * IAC commands come in sets of 3 bytes with the exception of the
2192 * "IAC BREAK" command and the double IAC.
2193 */
2194
2195 int i;
2196 int j = 0;
2197
2198 for (i = 0; i < *size; i++) {
2199 if (s->do_telnetopt > 1) {
2200 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2201 /* Double IAC means send an IAC */
2202 if (j != i)
2203 buf[j] = buf[i];
2204 j++;
2205 s->do_telnetopt = 1;
2206 } else {
2207 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2208 /* Handle IAC break commands by sending a serial break */
2209 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2210 s->do_telnetopt++;
2211 }
2212 s->do_telnetopt++;
2213 }
2214 if (s->do_telnetopt >= 4) {
2215 s->do_telnetopt = 1;
2216 }
2217 } else {
2218 if ((unsigned char)buf[i] == IAC) {
2219 s->do_telnetopt = 2;
2220 } else {
2221 if (j != i)
2222 buf[j] = buf[i];
2223 j++;
2224 }
2225 }
2226 }
2227 *size = j;
2228 }
2229
2230 static int tcp_get_msgfd(CharDriverState *chr)
2231 {
2232 TCPCharDriver *s = chr->opaque;
2233 int fd = s->msgfd;
2234 s->msgfd = -1;
2235 return fd;
2236 }
2237
2238 #ifndef _WIN32
2239 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2240 {
2241 TCPCharDriver *s = chr->opaque;
2242 struct cmsghdr *cmsg;
2243
2244 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2245 int fd;
2246
2247 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2248 cmsg->cmsg_level != SOL_SOCKET ||
2249 cmsg->cmsg_type != SCM_RIGHTS)
2250 continue;
2251
2252 fd = *((int *)CMSG_DATA(cmsg));
2253 if (fd < 0)
2254 continue;
2255
2256 #ifndef MSG_CMSG_CLOEXEC
2257 qemu_set_cloexec(fd);
2258 #endif
2259 if (s->msgfd != -1)
2260 close(s->msgfd);
2261 s->msgfd = fd;
2262 }
2263 }
2264
2265 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2266 {
2267 TCPCharDriver *s = chr->opaque;
2268 struct msghdr msg = { NULL, };
2269 struct iovec iov[1];
2270 union {
2271 struct cmsghdr cmsg;
2272 char control[CMSG_SPACE(sizeof(int))];
2273 } msg_control;
2274 int flags = 0;
2275 ssize_t ret;
2276
2277 iov[0].iov_base = buf;
2278 iov[0].iov_len = len;
2279
2280 msg.msg_iov = iov;
2281 msg.msg_iovlen = 1;
2282 msg.msg_control = &msg_control;
2283 msg.msg_controllen = sizeof(msg_control);
2284
2285 #ifdef MSG_CMSG_CLOEXEC
2286 flags |= MSG_CMSG_CLOEXEC;
2287 #endif
2288 ret = recvmsg(s->fd, &msg, flags);
2289 if (ret > 0 && s->is_unix) {
2290 unix_process_msgfd(chr, &msg);
2291 }
2292
2293 return ret;
2294 }
2295 #else
2296 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2297 {
2298 TCPCharDriver *s = chr->opaque;
2299 return qemu_recv(s->fd, buf, len, 0);
2300 }
2301 #endif
2302
2303 static void tcp_chr_read(void *opaque)
2304 {
2305 CharDriverState *chr = opaque;
2306 TCPCharDriver *s = chr->opaque;
2307 uint8_t buf[READ_BUF_LEN];
2308 int len, size;
2309
2310 if (!s->connected || s->max_size <= 0)
2311 return;
2312 len = sizeof(buf);
2313 if (len > s->max_size)
2314 len = s->max_size;
2315 size = tcp_chr_recv(chr, (void *)buf, len);
2316 if (size == 0) {
2317 /* connection closed */
2318 s->connected = 0;
2319 if (s->listen_fd >= 0) {
2320 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2321 }
2322 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2323 closesocket(s->fd);
2324 s->fd = -1;
2325 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2326 } else if (size > 0) {
2327 if (s->do_telnetopt)
2328 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2329 if (size > 0)
2330 qemu_chr_be_write(chr, buf, size);
2331 }
2332 }
2333
2334 #ifndef _WIN32
2335 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2336 {
2337 return qemu_chr_open_fd(eventfd, eventfd);
2338 }
2339 #endif
2340
2341 static void tcp_chr_connect(void *opaque)
2342 {
2343 CharDriverState *chr = opaque;
2344 TCPCharDriver *s = chr->opaque;
2345
2346 s->connected = 1;
2347 if (s->fd >= 0) {
2348 qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2349 tcp_chr_read, NULL, chr);
2350 }
2351 qemu_chr_generic_open(chr);
2352 }
2353
2354 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2355 static void tcp_chr_telnet_init(int fd)
2356 {
2357 char buf[3];
2358 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2359 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2360 send(fd, (char *)buf, 3, 0);
2361 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2362 send(fd, (char *)buf, 3, 0);
2363 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2364 send(fd, (char *)buf, 3, 0);
2365 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2366 send(fd, (char *)buf, 3, 0);
2367 }
2368
2369 static void socket_set_nodelay(int fd)
2370 {
2371 int val = 1;
2372 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2373 }
2374
2375 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2376 {
2377 TCPCharDriver *s = chr->opaque;
2378 if (s->fd != -1)
2379 return -1;
2380
2381 socket_set_nonblock(fd);
2382 if (s->do_nodelay)
2383 socket_set_nodelay(fd);
2384 s->fd = fd;
2385 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2386 tcp_chr_connect(chr);
2387
2388 return 0;
2389 }
2390
2391 static void tcp_chr_accept(void *opaque)
2392 {
2393 CharDriverState *chr = opaque;
2394 TCPCharDriver *s = chr->opaque;
2395 struct sockaddr_in saddr;
2396 #ifndef _WIN32
2397 struct sockaddr_un uaddr;
2398 #endif
2399 struct sockaddr *addr;
2400 socklen_t len;
2401 int fd;
2402
2403 for(;;) {
2404 #ifndef _WIN32
2405 if (s->is_unix) {
2406 len = sizeof(uaddr);
2407 addr = (struct sockaddr *)&uaddr;
2408 } else
2409 #endif
2410 {
2411 len = sizeof(saddr);
2412 addr = (struct sockaddr *)&saddr;
2413 }
2414 fd = qemu_accept(s->listen_fd, addr, &len);
2415 if (fd < 0 && errno != EINTR) {
2416 return;
2417 } else if (fd >= 0) {
2418 if (s->do_telnetopt)
2419 tcp_chr_telnet_init(fd);
2420 break;
2421 }
2422 }
2423 if (tcp_chr_add_client(chr, fd) < 0)
2424 close(fd);
2425 }
2426
2427 static void tcp_chr_close(CharDriverState *chr)
2428 {
2429 TCPCharDriver *s = chr->opaque;
2430 if (s->fd >= 0) {
2431 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2432 closesocket(s->fd);
2433 }
2434 if (s->listen_fd >= 0) {
2435 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2436 closesocket(s->listen_fd);
2437 }
2438 g_free(s);
2439 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2440 }
2441
2442 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2443 {
2444 CharDriverState *chr = NULL;
2445 TCPCharDriver *s = NULL;
2446 Error *local_err = NULL;
2447 int fd = -1;
2448 int is_listen;
2449 int is_waitconnect;
2450 int do_nodelay;
2451 int is_unix;
2452 int is_telnet;
2453
2454 is_listen = qemu_opt_get_bool(opts, "server", 0);
2455 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2456 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2457 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2458 is_unix = qemu_opt_get(opts, "path") != NULL;
2459 if (!is_listen)
2460 is_waitconnect = 0;
2461
2462 chr = g_malloc0(sizeof(CharDriverState));
2463 s = g_malloc0(sizeof(TCPCharDriver));
2464
2465 if (is_unix) {
2466 if (is_listen) {
2467 fd = unix_listen_opts(opts, &local_err);
2468 } else {
2469 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
2470 }
2471 } else {
2472 if (is_listen) {
2473 fd = inet_listen_opts(opts, 0, &local_err);
2474 } else {
2475 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
2476 }
2477 }
2478 if (fd < 0) {
2479 goto fail;
2480 }
2481
2482 if (!is_waitconnect)
2483 socket_set_nonblock(fd);
2484
2485 s->connected = 0;
2486 s->fd = -1;
2487 s->listen_fd = -1;
2488 s->msgfd = -1;
2489 s->is_unix = is_unix;
2490 s->do_nodelay = do_nodelay && !is_unix;
2491
2492 chr->opaque = s;
2493 chr->chr_write = tcp_chr_write;
2494 chr->chr_close = tcp_chr_close;
2495 chr->get_msgfd = tcp_get_msgfd;
2496 chr->chr_add_client = tcp_chr_add_client;
2497
2498 if (is_listen) {
2499 s->listen_fd = fd;
2500 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2501 if (is_telnet)
2502 s->do_telnetopt = 1;
2503
2504 } else {
2505 s->connected = 1;
2506 s->fd = fd;
2507 socket_set_nodelay(fd);
2508 tcp_chr_connect(chr);
2509 }
2510
2511 /* for "info chardev" monitor command */
2512 chr->filename = g_malloc(256);
2513 if (is_unix) {
2514 snprintf(chr->filename, 256, "unix:%s%s",
2515 qemu_opt_get(opts, "path"),
2516 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2517 } else if (is_telnet) {
2518 snprintf(chr->filename, 256, "telnet:%s:%s%s",
2519 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2520 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2521 } else {
2522 snprintf(chr->filename, 256, "tcp:%s:%s%s",
2523 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2524 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2525 }
2526
2527 if (is_listen && is_waitconnect) {
2528 printf("QEMU waiting for connection on: %s\n",
2529 chr->filename);
2530 tcp_chr_accept(chr);
2531 socket_set_nonblock(s->listen_fd);
2532 }
2533 return chr;
2534
2535 fail:
2536 if (local_err) {
2537 qerror_report_err(local_err);
2538 error_free(local_err);
2539 }
2540 if (fd >= 0) {
2541 closesocket(fd);
2542 }
2543 g_free(s);
2544 g_free(chr);
2545 return NULL;
2546 }
2547
2548 /***********************************************************/
2549 /* Memory chardev */
2550 typedef struct {
2551 size_t outbuf_size;
2552 size_t outbuf_capacity;
2553 uint8_t *outbuf;
2554 } MemoryDriver;
2555
2556 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2557 {
2558 MemoryDriver *d = chr->opaque;
2559
2560 /* TODO: the QString implementation has the same code, we should
2561 * introduce a generic way to do this in cutils.c */
2562 if (d->outbuf_capacity < d->outbuf_size + len) {
2563 /* grow outbuf */
2564 d->outbuf_capacity += len;
2565 d->outbuf_capacity *= 2;
2566 d->outbuf = g_realloc(d->outbuf, d->outbuf_capacity);
2567 }
2568
2569 memcpy(d->outbuf + d->outbuf_size, buf, len);
2570 d->outbuf_size += len;
2571
2572 return len;
2573 }
2574
2575 void qemu_chr_init_mem(CharDriverState *chr)
2576 {
2577 MemoryDriver *d;
2578
2579 d = g_malloc(sizeof(*d));
2580 d->outbuf_size = 0;
2581 d->outbuf_capacity = 4096;
2582 d->outbuf = g_malloc0(d->outbuf_capacity);
2583
2584 memset(chr, 0, sizeof(*chr));
2585 chr->opaque = d;
2586 chr->chr_write = mem_chr_write;
2587 }
2588
2589 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2590 {
2591 MemoryDriver *d = chr->opaque;
2592 return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2593 }
2594
2595 /* NOTE: this driver can not be closed with qemu_chr_delete()! */
2596 void qemu_chr_close_mem(CharDriverState *chr)
2597 {
2598 MemoryDriver *d = chr->opaque;
2599
2600 g_free(d->outbuf);
2601 g_free(chr->opaque);
2602 chr->opaque = NULL;
2603 chr->chr_write = NULL;
2604 }
2605
2606 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2607 {
2608 const MemoryDriver *d = chr->opaque;
2609 return d->outbuf_size;
2610 }
2611
2612 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2613 {
2614 char host[65], port[33], width[8], height[8];
2615 int pos;
2616 const char *p;
2617 QemuOpts *opts;
2618 Error *local_err = NULL;
2619
2620 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
2621 if (error_is_set(&local_err)) {
2622 qerror_report_err(local_err);
2623 error_free(local_err);
2624 return NULL;
2625 }
2626
2627 if (strstart(filename, "mon:", &p)) {
2628 filename = p;
2629 qemu_opt_set(opts, "mux", "on");
2630 }
2631
2632 if (strcmp(filename, "null") == 0 ||
2633 strcmp(filename, "pty") == 0 ||
2634 strcmp(filename, "msmouse") == 0 ||
2635 strcmp(filename, "braille") == 0 ||
2636 strcmp(filename, "stdio") == 0) {
2637 qemu_opt_set(opts, "backend", filename);
2638 return opts;
2639 }
2640 if (strstart(filename, "vc", &p)) {
2641 qemu_opt_set(opts, "backend", "vc");
2642 if (*p == ':') {
2643 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2644 /* pixels */
2645 qemu_opt_set(opts, "width", width);
2646 qemu_opt_set(opts, "height", height);
2647 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2648 /* chars */
2649 qemu_opt_set(opts, "cols", width);
2650 qemu_opt_set(opts, "rows", height);
2651 } else {
2652 goto fail;
2653 }
2654 }
2655 return opts;
2656 }
2657 if (strcmp(filename, "con:") == 0) {
2658 qemu_opt_set(opts, "backend", "console");
2659 return opts;
2660 }
2661 if (strstart(filename, "COM", NULL)) {
2662 qemu_opt_set(opts, "backend", "serial");
2663 qemu_opt_set(opts, "path", filename);
2664 return opts;
2665 }
2666 if (strstart(filename, "file:", &p)) {
2667 qemu_opt_set(opts, "backend", "file");
2668 qemu_opt_set(opts, "path", p);
2669 return opts;
2670 }
2671 if (strstart(filename, "pipe:", &p)) {
2672 qemu_opt_set(opts, "backend", "pipe");
2673 qemu_opt_set(opts, "path", p);
2674 return opts;
2675 }
2676 if (strstart(filename, "tcp:", &p) ||
2677 strstart(filename, "telnet:", &p)) {
2678 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2679 host[0] = 0;
2680 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2681 goto fail;
2682 }
2683 qemu_opt_set(opts, "backend", "socket");
2684 qemu_opt_set(opts, "host", host);
2685 qemu_opt_set(opts, "port", port);
2686 if (p[pos] == ',') {
2687 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2688 goto fail;
2689 }
2690 if (strstart(filename, "telnet:", &p))
2691 qemu_opt_set(opts, "telnet", "on");
2692 return opts;
2693 }
2694 if (strstart(filename, "udp:", &p)) {
2695 qemu_opt_set(opts, "backend", "udp");
2696 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2697 host[0] = 0;
2698 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2699 goto fail;
2700 }
2701 }
2702 qemu_opt_set(opts, "host", host);
2703 qemu_opt_set(opts, "port", port);
2704 if (p[pos] == '@') {
2705 p += pos + 1;
2706 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2707 host[0] = 0;
2708 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2709 goto fail;
2710 }
2711 }
2712 qemu_opt_set(opts, "localaddr", host);
2713 qemu_opt_set(opts, "localport", port);
2714 }
2715 return opts;
2716 }
2717 if (strstart(filename, "unix:", &p)) {
2718 qemu_opt_set(opts, "backend", "socket");
2719 if (qemu_opts_do_parse(opts, p, "path") != 0)
2720 goto fail;
2721 return opts;
2722 }
2723 if (strstart(filename, "/dev/parport", NULL) ||
2724 strstart(filename, "/dev/ppi", NULL)) {
2725 qemu_opt_set(opts, "backend", "parport");
2726 qemu_opt_set(opts, "path", filename);
2727 return opts;
2728 }
2729 if (strstart(filename, "/dev/", NULL)) {
2730 qemu_opt_set(opts, "backend", "tty");
2731 qemu_opt_set(opts, "path", filename);
2732 return opts;
2733 }
2734
2735 fail:
2736 qemu_opts_del(opts);
2737 return NULL;
2738 }
2739
2740 static const struct {
2741 const char *name;
2742 CharDriverState *(*open)(QemuOpts *opts);
2743 } backend_table[] = {
2744 { .name = "null", .open = qemu_chr_open_null },
2745 { .name = "socket", .open = qemu_chr_open_socket },
2746 { .name = "udp", .open = qemu_chr_open_udp },
2747 { .name = "msmouse", .open = qemu_chr_open_msmouse },
2748 { .name = "vc", .open = text_console_init },
2749 #ifdef _WIN32
2750 { .name = "file", .open = qemu_chr_open_win_file_out },
2751 { .name = "pipe", .open = qemu_chr_open_win_pipe },
2752 { .name = "console", .open = qemu_chr_open_win_con },
2753 { .name = "serial", .open = qemu_chr_open_win },
2754 { .name = "stdio", .open = qemu_chr_open_win_stdio },
2755 #else
2756 { .name = "file", .open = qemu_chr_open_file_out },
2757 { .name = "pipe", .open = qemu_chr_open_pipe },
2758 { .name = "pty", .open = qemu_chr_open_pty },
2759 { .name = "stdio", .open = qemu_chr_open_stdio },
2760 #endif
2761 #ifdef CONFIG_BRLAPI
2762 { .name = "braille", .open = chr_baum_init },
2763 #endif
2764 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2765 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
2766 || defined(__FreeBSD_kernel__)
2767 { .name = "tty", .open = qemu_chr_open_tty },
2768 #endif
2769 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
2770 || defined(__FreeBSD_kernel__)
2771 { .name = "parport", .open = qemu_chr_open_pp },
2772 #endif
2773 #ifdef CONFIG_SPICE
2774 { .name = "spicevmc", .open = qemu_chr_open_spice },
2775 #if SPICE_SERVER_VERSION >= 0x000c02
2776 { .name = "spiceport", .open = qemu_chr_open_spice_port },
2777 #endif
2778 #endif
2779 };
2780
2781 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
2782 void (*init)(struct CharDriverState *s))
2783 {
2784 CharDriverState *chr;
2785 int i;
2786
2787 if (qemu_opts_id(opts) == NULL) {
2788 fprintf(stderr, "chardev: no id specified\n");
2789 return NULL;
2790 }
2791
2792 if (qemu_opt_get(opts, "backend") == NULL) {
2793 fprintf(stderr, "chardev: \"%s\" missing backend\n",
2794 qemu_opts_id(opts));
2795 return NULL;
2796 }
2797 for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2798 if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2799 break;
2800 }
2801 if (i == ARRAY_SIZE(backend_table)) {
2802 fprintf(stderr, "chardev: backend \"%s\" not found\n",
2803 qemu_opt_get(opts, "backend"));
2804 return NULL;
2805 }
2806
2807 chr = backend_table[i].open(opts);
2808 if (!chr) {
2809 fprintf(stderr, "chardev: opening backend \"%s\" failed\n",
2810 qemu_opt_get(opts, "backend"));
2811 return NULL;
2812 }
2813
2814 if (!chr->filename)
2815 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
2816 chr->init = init;
2817 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2818
2819 if (qemu_opt_get_bool(opts, "mux", 0)) {
2820 CharDriverState *base = chr;
2821 int len = strlen(qemu_opts_id(opts)) + 6;
2822 base->label = g_malloc(len);
2823 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
2824 chr = qemu_chr_open_mux(base);
2825 chr->filename = base->filename;
2826 chr->avail_connections = MAX_MUX;
2827 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2828 } else {
2829 chr->avail_connections = 1;
2830 }
2831 chr->label = g_strdup(qemu_opts_id(opts));
2832 return chr;
2833 }
2834
2835 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2836 {
2837 const char *p;
2838 CharDriverState *chr;
2839 QemuOpts *opts;
2840
2841 if (strstart(filename, "chardev:", &p)) {
2842 return qemu_chr_find(p);
2843 }
2844
2845 opts = qemu_chr_parse_compat(label, filename);
2846 if (!opts)
2847 return NULL;
2848
2849 chr = qemu_chr_new_from_opts(opts, init);
2850 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
2851 monitor_init(chr, MONITOR_USE_READLINE);
2852 }
2853 qemu_opts_del(opts);
2854 return chr;
2855 }
2856
2857 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
2858 {
2859 if (chr->chr_set_echo) {
2860 chr->chr_set_echo(chr, echo);
2861 }
2862 }
2863
2864 void qemu_chr_fe_open(struct CharDriverState *chr)
2865 {
2866 if (chr->chr_guest_open) {
2867 chr->chr_guest_open(chr);
2868 }
2869 }
2870
2871 void qemu_chr_fe_close(struct CharDriverState *chr)
2872 {
2873 if (chr->chr_guest_close) {
2874 chr->chr_guest_close(chr);
2875 }
2876 }
2877
2878 void qemu_chr_delete(CharDriverState *chr)
2879 {
2880 QTAILQ_REMOVE(&chardevs, chr, next);
2881 if (chr->chr_close)
2882 chr->chr_close(chr);
2883 g_free(chr->filename);
2884 g_free(chr->label);
2885 g_free(chr);
2886 }
2887
2888 ChardevInfoList *qmp_query_chardev(Error **errp)
2889 {
2890 ChardevInfoList *chr_list = NULL;
2891 CharDriverState *chr;
2892
2893 QTAILQ_FOREACH(chr, &chardevs, next) {
2894 ChardevInfoList *info = g_malloc0(sizeof(*info));
2895 info->value = g_malloc0(sizeof(*info->value));
2896 info->value->label = g_strdup(chr->label);
2897 info->value->filename = g_strdup(chr->filename);
2898
2899 info->next = chr_list;
2900 chr_list = info;
2901 }
2902
2903 return chr_list;
2904 }
2905
2906 CharDriverState *qemu_chr_find(const char *name)
2907 {
2908 CharDriverState *chr;
2909
2910 QTAILQ_FOREACH(chr, &chardevs, next) {
2911 if (strcmp(chr->label, name) != 0)
2912 continue;
2913 return chr;
2914 }
2915 return NULL;
2916 }
2917
2918 /* Get a character (serial) device interface. */
2919 CharDriverState *qemu_char_get_next_serial(void)
2920 {
2921 static int next_serial;
2922
2923 /* FIXME: This function needs to go away: use chardev properties! */
2924 return serial_hds[next_serial++];
2925 }
2926
Qemu copy for testing