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chardev: add qmp hotplug commands, with null chardev support
[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 #define HAVE_CHARDEV_TTY 1
860
861 typedef struct {
862 int fd;
863 int connected;
864 int polling;
865 int read_bytes;
866 QEMUTimer *timer;
867 } PtyCharDriver;
868
869 static void pty_chr_update_read_handler(CharDriverState *chr);
870 static void pty_chr_state(CharDriverState *chr, int connected);
871
872 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
873 {
874 PtyCharDriver *s = chr->opaque;
875
876 if (!s->connected) {
877 /* guest sends data, check for (re-)connect */
878 pty_chr_update_read_handler(chr);
879 return 0;
880 }
881 return send_all(s->fd, buf, len);
882 }
883
884 static int pty_chr_read_poll(void *opaque)
885 {
886 CharDriverState *chr = opaque;
887 PtyCharDriver *s = chr->opaque;
888
889 s->read_bytes = qemu_chr_be_can_write(chr);
890 return s->read_bytes;
891 }
892
893 static void pty_chr_read(void *opaque)
894 {
895 CharDriverState *chr = opaque;
896 PtyCharDriver *s = chr->opaque;
897 int size, len;
898 uint8_t buf[READ_BUF_LEN];
899
900 len = sizeof(buf);
901 if (len > s->read_bytes)
902 len = s->read_bytes;
903 if (len == 0)
904 return;
905 size = read(s->fd, buf, len);
906 if ((size == -1 && errno == EIO) ||
907 (size == 0)) {
908 pty_chr_state(chr, 0);
909 return;
910 }
911 if (size > 0) {
912 pty_chr_state(chr, 1);
913 qemu_chr_be_write(chr, buf, size);
914 }
915 }
916
917 static void pty_chr_update_read_handler(CharDriverState *chr)
918 {
919 PtyCharDriver *s = chr->opaque;
920
921 qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
922 pty_chr_read, NULL, chr);
923 s->polling = 1;
924 /*
925 * Short timeout here: just need wait long enougth that qemu makes
926 * it through the poll loop once. When reconnected we want a
927 * short timeout so we notice it almost instantly. Otherwise
928 * read() gives us -EIO instantly, making pty_chr_state() reset the
929 * timeout to the normal (much longer) poll interval before the
930 * timer triggers.
931 */
932 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 10);
933 }
934
935 static void pty_chr_state(CharDriverState *chr, int connected)
936 {
937 PtyCharDriver *s = chr->opaque;
938
939 if (!connected) {
940 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
941 s->connected = 0;
942 s->polling = 0;
943 /* (re-)connect poll interval for idle guests: once per second.
944 * We check more frequently in case the guests sends data to
945 * the virtual device linked to our pty. */
946 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 1000);
947 } else {
948 if (!s->connected)
949 qemu_chr_generic_open(chr);
950 s->connected = 1;
951 }
952 }
953
954 static void pty_chr_timer(void *opaque)
955 {
956 struct CharDriverState *chr = opaque;
957 PtyCharDriver *s = chr->opaque;
958
959 if (s->connected)
960 return;
961 if (s->polling) {
962 /* If we arrive here without polling being cleared due
963 * read returning -EIO, then we are (re-)connected */
964 pty_chr_state(chr, 1);
965 return;
966 }
967
968 /* Next poll ... */
969 pty_chr_update_read_handler(chr);
970 }
971
972 static void pty_chr_close(struct CharDriverState *chr)
973 {
974 PtyCharDriver *s = chr->opaque;
975
976 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
977 close(s->fd);
978 qemu_del_timer(s->timer);
979 qemu_free_timer(s->timer);
980 g_free(s);
981 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
982 }
983
984 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
985 {
986 CharDriverState *chr;
987 PtyCharDriver *s;
988 struct termios tty;
989 const char *label;
990 int master_fd, slave_fd, len;
991 #if defined(__OpenBSD__) || defined(__DragonFly__)
992 char pty_name[PATH_MAX];
993 #define q_ptsname(x) pty_name
994 #else
995 char *pty_name = NULL;
996 #define q_ptsname(x) ptsname(x)
997 #endif
998
999 if (openpty(&master_fd, &slave_fd, pty_name, NULL, NULL) < 0) {
1000 return NULL;
1001 }
1002
1003 /* Set raw attributes on the pty. */
1004 tcgetattr(slave_fd, &tty);
1005 cfmakeraw(&tty);
1006 tcsetattr(slave_fd, TCSAFLUSH, &tty);
1007 close(slave_fd);
1008
1009 chr = g_malloc0(sizeof(CharDriverState));
1010
1011 len = strlen(q_ptsname(master_fd)) + 5;
1012 chr->filename = g_malloc(len);
1013 snprintf(chr->filename, len, "pty:%s", q_ptsname(master_fd));
1014 qemu_opt_set(opts, "path", q_ptsname(master_fd));
1015
1016 label = qemu_opts_id(opts);
1017 fprintf(stderr, "char device redirected to %s%s%s%s\n",
1018 q_ptsname(master_fd),
1019 label ? " (label " : "",
1020 label ? label : "",
1021 label ? ")" : "");
1022
1023 s = g_malloc0(sizeof(PtyCharDriver));
1024 chr->opaque = s;
1025 chr->chr_write = pty_chr_write;
1026 chr->chr_update_read_handler = pty_chr_update_read_handler;
1027 chr->chr_close = pty_chr_close;
1028
1029 s->fd = master_fd;
1030 s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr);
1031
1032 return chr;
1033 }
1034
1035 static void tty_serial_init(int fd, int speed,
1036 int parity, int data_bits, int stop_bits)
1037 {
1038 struct termios tty;
1039 speed_t spd;
1040
1041 #if 0
1042 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1043 speed, parity, data_bits, stop_bits);
1044 #endif
1045 tcgetattr (fd, &tty);
1046
1047 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1048 speed = speed * 10 / 11;
1049 do {
1050 check_speed(50);
1051 check_speed(75);
1052 check_speed(110);
1053 check_speed(134);
1054 check_speed(150);
1055 check_speed(200);
1056 check_speed(300);
1057 check_speed(600);
1058 check_speed(1200);
1059 check_speed(1800);
1060 check_speed(2400);
1061 check_speed(4800);
1062 check_speed(9600);
1063 check_speed(19200);
1064 check_speed(38400);
1065 /* Non-Posix values follow. They may be unsupported on some systems. */
1066 check_speed(57600);
1067 check_speed(115200);
1068 #ifdef B230400
1069 check_speed(230400);
1070 #endif
1071 #ifdef B460800
1072 check_speed(460800);
1073 #endif
1074 #ifdef B500000
1075 check_speed(500000);
1076 #endif
1077 #ifdef B576000
1078 check_speed(576000);
1079 #endif
1080 #ifdef B921600
1081 check_speed(921600);
1082 #endif
1083 #ifdef B1000000
1084 check_speed(1000000);
1085 #endif
1086 #ifdef B1152000
1087 check_speed(1152000);
1088 #endif
1089 #ifdef B1500000
1090 check_speed(1500000);
1091 #endif
1092 #ifdef B2000000
1093 check_speed(2000000);
1094 #endif
1095 #ifdef B2500000
1096 check_speed(2500000);
1097 #endif
1098 #ifdef B3000000
1099 check_speed(3000000);
1100 #endif
1101 #ifdef B3500000
1102 check_speed(3500000);
1103 #endif
1104 #ifdef B4000000
1105 check_speed(4000000);
1106 #endif
1107 spd = B115200;
1108 } while (0);
1109
1110 cfsetispeed(&tty, spd);
1111 cfsetospeed(&tty, spd);
1112
1113 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1114 |INLCR|IGNCR|ICRNL|IXON);
1115 tty.c_oflag |= OPOST;
1116 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1117 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1118 switch(data_bits) {
1119 default:
1120 case 8:
1121 tty.c_cflag |= CS8;
1122 break;
1123 case 7:
1124 tty.c_cflag |= CS7;
1125 break;
1126 case 6:
1127 tty.c_cflag |= CS6;
1128 break;
1129 case 5:
1130 tty.c_cflag |= CS5;
1131 break;
1132 }
1133 switch(parity) {
1134 default:
1135 case 'N':
1136 break;
1137 case 'E':
1138 tty.c_cflag |= PARENB;
1139 break;
1140 case 'O':
1141 tty.c_cflag |= PARENB | PARODD;
1142 break;
1143 }
1144 if (stop_bits == 2)
1145 tty.c_cflag |= CSTOPB;
1146
1147 tcsetattr (fd, TCSANOW, &tty);
1148 }
1149
1150 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1151 {
1152 FDCharDriver *s = chr->opaque;
1153
1154 switch(cmd) {
1155 case CHR_IOCTL_SERIAL_SET_PARAMS:
1156 {
1157 QEMUSerialSetParams *ssp = arg;
1158 tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1159 ssp->data_bits, ssp->stop_bits);
1160 }
1161 break;
1162 case CHR_IOCTL_SERIAL_SET_BREAK:
1163 {
1164 int enable = *(int *)arg;
1165 if (enable)
1166 tcsendbreak(s->fd_in, 1);
1167 }
1168 break;
1169 case CHR_IOCTL_SERIAL_GET_TIOCM:
1170 {
1171 int sarg = 0;
1172 int *targ = (int *)arg;
1173 ioctl(s->fd_in, TIOCMGET, &sarg);
1174 *targ = 0;
1175 if (sarg & TIOCM_CTS)
1176 *targ |= CHR_TIOCM_CTS;
1177 if (sarg & TIOCM_CAR)
1178 *targ |= CHR_TIOCM_CAR;
1179 if (sarg & TIOCM_DSR)
1180 *targ |= CHR_TIOCM_DSR;
1181 if (sarg & TIOCM_RI)
1182 *targ |= CHR_TIOCM_RI;
1183 if (sarg & TIOCM_DTR)
1184 *targ |= CHR_TIOCM_DTR;
1185 if (sarg & TIOCM_RTS)
1186 *targ |= CHR_TIOCM_RTS;
1187 }
1188 break;
1189 case CHR_IOCTL_SERIAL_SET_TIOCM:
1190 {
1191 int sarg = *(int *)arg;
1192 int targ = 0;
1193 ioctl(s->fd_in, TIOCMGET, &targ);
1194 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1195 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1196 if (sarg & CHR_TIOCM_CTS)
1197 targ |= TIOCM_CTS;
1198 if (sarg & CHR_TIOCM_CAR)
1199 targ |= TIOCM_CAR;
1200 if (sarg & CHR_TIOCM_DSR)
1201 targ |= TIOCM_DSR;
1202 if (sarg & CHR_TIOCM_RI)
1203 targ |= TIOCM_RI;
1204 if (sarg & CHR_TIOCM_DTR)
1205 targ |= TIOCM_DTR;
1206 if (sarg & CHR_TIOCM_RTS)
1207 targ |= TIOCM_RTS;
1208 ioctl(s->fd_in, TIOCMSET, &targ);
1209 }
1210 break;
1211 default:
1212 return -ENOTSUP;
1213 }
1214 return 0;
1215 }
1216
1217 static void qemu_chr_close_tty(CharDriverState *chr)
1218 {
1219 FDCharDriver *s = chr->opaque;
1220 int fd = -1;
1221
1222 if (s) {
1223 fd = s->fd_in;
1224 }
1225
1226 fd_chr_close(chr);
1227
1228 if (fd >= 0) {
1229 close(fd);
1230 }
1231 }
1232
1233 static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
1234 {
1235 const char *filename = qemu_opt_get(opts, "path");
1236 CharDriverState *chr;
1237 int fd;
1238
1239 TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK));
1240 if (fd < 0) {
1241 return NULL;
1242 }
1243 tty_serial_init(fd, 115200, 'N', 8, 1);
1244 chr = qemu_chr_open_fd(fd, fd);
1245 chr->chr_ioctl = tty_serial_ioctl;
1246 chr->chr_close = qemu_chr_close_tty;
1247 return chr;
1248 }
1249 #endif /* __linux__ || __sun__ */
1250
1251 #if defined(__linux__)
1252
1253 #define HAVE_CHARDEV_PARPORT 1
1254
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
1399 #define HAVE_CHARDEV_PARPORT 1
1400
1401 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1402 {
1403 int fd = (int)(intptr_t)chr->opaque;
1404 uint8_t b;
1405
1406 switch(cmd) {
1407 case CHR_IOCTL_PP_READ_DATA:
1408 if (ioctl(fd, PPIGDATA, &b) < 0)
1409 return -ENOTSUP;
1410 *(uint8_t *)arg = b;
1411 break;
1412 case CHR_IOCTL_PP_WRITE_DATA:
1413 b = *(uint8_t *)arg;
1414 if (ioctl(fd, PPISDATA, &b) < 0)
1415 return -ENOTSUP;
1416 break;
1417 case CHR_IOCTL_PP_READ_CONTROL:
1418 if (ioctl(fd, PPIGCTRL, &b) < 0)
1419 return -ENOTSUP;
1420 *(uint8_t *)arg = b;
1421 break;
1422 case CHR_IOCTL_PP_WRITE_CONTROL:
1423 b = *(uint8_t *)arg;
1424 if (ioctl(fd, PPISCTRL, &b) < 0)
1425 return -ENOTSUP;
1426 break;
1427 case CHR_IOCTL_PP_READ_STATUS:
1428 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1429 return -ENOTSUP;
1430 *(uint8_t *)arg = b;
1431 break;
1432 default:
1433 return -ENOTSUP;
1434 }
1435 return 0;
1436 }
1437
1438 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1439 {
1440 const char *filename = qemu_opt_get(opts, "path");
1441 CharDriverState *chr;
1442 int fd;
1443
1444 fd = qemu_open(filename, O_RDWR);
1445 if (fd < 0) {
1446 return NULL;
1447 }
1448
1449 chr = g_malloc0(sizeof(CharDriverState));
1450 chr->opaque = (void *)(intptr_t)fd;
1451 chr->chr_write = null_chr_write;
1452 chr->chr_ioctl = pp_ioctl;
1453 return chr;
1454 }
1455 #endif
1456
1457 #else /* _WIN32 */
1458
1459 static CharDriverState *stdio_clients[STDIO_MAX_CLIENTS];
1460
1461 typedef struct {
1462 int max_size;
1463 HANDLE hcom, hrecv, hsend;
1464 OVERLAPPED orecv, osend;
1465 BOOL fpipe;
1466 DWORD len;
1467 } WinCharState;
1468
1469 typedef struct {
1470 HANDLE hStdIn;
1471 HANDLE hInputReadyEvent;
1472 HANDLE hInputDoneEvent;
1473 HANDLE hInputThread;
1474 uint8_t win_stdio_buf;
1475 } WinStdioCharState;
1476
1477 #define NSENDBUF 2048
1478 #define NRECVBUF 2048
1479 #define MAXCONNECT 1
1480 #define NTIMEOUT 5000
1481
1482 static int win_chr_poll(void *opaque);
1483 static int win_chr_pipe_poll(void *opaque);
1484
1485 static void win_chr_close(CharDriverState *chr)
1486 {
1487 WinCharState *s = chr->opaque;
1488
1489 if (s->hsend) {
1490 CloseHandle(s->hsend);
1491 s->hsend = NULL;
1492 }
1493 if (s->hrecv) {
1494 CloseHandle(s->hrecv);
1495 s->hrecv = NULL;
1496 }
1497 if (s->hcom) {
1498 CloseHandle(s->hcom);
1499 s->hcom = NULL;
1500 }
1501 if (s->fpipe)
1502 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1503 else
1504 qemu_del_polling_cb(win_chr_poll, chr);
1505
1506 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1507 }
1508
1509 static int win_chr_init(CharDriverState *chr, const char *filename)
1510 {
1511 WinCharState *s = chr->opaque;
1512 COMMCONFIG comcfg;
1513 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1514 COMSTAT comstat;
1515 DWORD size;
1516 DWORD err;
1517
1518 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1519 if (!s->hsend) {
1520 fprintf(stderr, "Failed CreateEvent\n");
1521 goto fail;
1522 }
1523 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1524 if (!s->hrecv) {
1525 fprintf(stderr, "Failed CreateEvent\n");
1526 goto fail;
1527 }
1528
1529 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1530 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1531 if (s->hcom == INVALID_HANDLE_VALUE) {
1532 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1533 s->hcom = NULL;
1534 goto fail;
1535 }
1536
1537 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1538 fprintf(stderr, "Failed SetupComm\n");
1539 goto fail;
1540 }
1541
1542 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1543 size = sizeof(COMMCONFIG);
1544 GetDefaultCommConfig(filename, &comcfg, &size);
1545 comcfg.dcb.DCBlength = sizeof(DCB);
1546 CommConfigDialog(filename, NULL, &comcfg);
1547
1548 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1549 fprintf(stderr, "Failed SetCommState\n");
1550 goto fail;
1551 }
1552
1553 if (!SetCommMask(s->hcom, EV_ERR)) {
1554 fprintf(stderr, "Failed SetCommMask\n");
1555 goto fail;
1556 }
1557
1558 cto.ReadIntervalTimeout = MAXDWORD;
1559 if (!SetCommTimeouts(s->hcom, &cto)) {
1560 fprintf(stderr, "Failed SetCommTimeouts\n");
1561 goto fail;
1562 }
1563
1564 if (!ClearCommError(s->hcom, &err, &comstat)) {
1565 fprintf(stderr, "Failed ClearCommError\n");
1566 goto fail;
1567 }
1568 qemu_add_polling_cb(win_chr_poll, chr);
1569 return 0;
1570
1571 fail:
1572 win_chr_close(chr);
1573 return -1;
1574 }
1575
1576 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1577 {
1578 WinCharState *s = chr->opaque;
1579 DWORD len, ret, size, err;
1580
1581 len = len1;
1582 ZeroMemory(&s->osend, sizeof(s->osend));
1583 s->osend.hEvent = s->hsend;
1584 while (len > 0) {
1585 if (s->hsend)
1586 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1587 else
1588 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1589 if (!ret) {
1590 err = GetLastError();
1591 if (err == ERROR_IO_PENDING) {
1592 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1593 if (ret) {
1594 buf += size;
1595 len -= size;
1596 } else {
1597 break;
1598 }
1599 } else {
1600 break;
1601 }
1602 } else {
1603 buf += size;
1604 len -= size;
1605 }
1606 }
1607 return len1 - len;
1608 }
1609
1610 static int win_chr_read_poll(CharDriverState *chr)
1611 {
1612 WinCharState *s = chr->opaque;
1613
1614 s->max_size = qemu_chr_be_can_write(chr);
1615 return s->max_size;
1616 }
1617
1618 static void win_chr_readfile(CharDriverState *chr)
1619 {
1620 WinCharState *s = chr->opaque;
1621 int ret, err;
1622 uint8_t buf[READ_BUF_LEN];
1623 DWORD size;
1624
1625 ZeroMemory(&s->orecv, sizeof(s->orecv));
1626 s->orecv.hEvent = s->hrecv;
1627 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1628 if (!ret) {
1629 err = GetLastError();
1630 if (err == ERROR_IO_PENDING) {
1631 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1632 }
1633 }
1634
1635 if (size > 0) {
1636 qemu_chr_be_write(chr, buf, size);
1637 }
1638 }
1639
1640 static void win_chr_read(CharDriverState *chr)
1641 {
1642 WinCharState *s = chr->opaque;
1643
1644 if (s->len > s->max_size)
1645 s->len = s->max_size;
1646 if (s->len == 0)
1647 return;
1648
1649 win_chr_readfile(chr);
1650 }
1651
1652 static int win_chr_poll(void *opaque)
1653 {
1654 CharDriverState *chr = opaque;
1655 WinCharState *s = chr->opaque;
1656 COMSTAT status;
1657 DWORD comerr;
1658
1659 ClearCommError(s->hcom, &comerr, &status);
1660 if (status.cbInQue > 0) {
1661 s->len = status.cbInQue;
1662 win_chr_read_poll(chr);
1663 win_chr_read(chr);
1664 return 1;
1665 }
1666 return 0;
1667 }
1668
1669 static CharDriverState *qemu_chr_open_win(QemuOpts *opts)
1670 {
1671 const char *filename = qemu_opt_get(opts, "path");
1672 CharDriverState *chr;
1673 WinCharState *s;
1674
1675 chr = g_malloc0(sizeof(CharDriverState));
1676 s = g_malloc0(sizeof(WinCharState));
1677 chr->opaque = s;
1678 chr->chr_write = win_chr_write;
1679 chr->chr_close = win_chr_close;
1680
1681 if (win_chr_init(chr, filename) < 0) {
1682 g_free(s);
1683 g_free(chr);
1684 return NULL;
1685 }
1686 qemu_chr_generic_open(chr);
1687 return chr;
1688 }
1689
1690 static int win_chr_pipe_poll(void *opaque)
1691 {
1692 CharDriverState *chr = opaque;
1693 WinCharState *s = chr->opaque;
1694 DWORD size;
1695
1696 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1697 if (size > 0) {
1698 s->len = size;
1699 win_chr_read_poll(chr);
1700 win_chr_read(chr);
1701 return 1;
1702 }
1703 return 0;
1704 }
1705
1706 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1707 {
1708 WinCharState *s = chr->opaque;
1709 OVERLAPPED ov;
1710 int ret;
1711 DWORD size;
1712 char openname[256];
1713
1714 s->fpipe = TRUE;
1715
1716 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1717 if (!s->hsend) {
1718 fprintf(stderr, "Failed CreateEvent\n");
1719 goto fail;
1720 }
1721 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1722 if (!s->hrecv) {
1723 fprintf(stderr, "Failed CreateEvent\n");
1724 goto fail;
1725 }
1726
1727 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1728 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1729 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1730 PIPE_WAIT,
1731 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1732 if (s->hcom == INVALID_HANDLE_VALUE) {
1733 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1734 s->hcom = NULL;
1735 goto fail;
1736 }
1737
1738 ZeroMemory(&ov, sizeof(ov));
1739 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1740 ret = ConnectNamedPipe(s->hcom, &ov);
1741 if (ret) {
1742 fprintf(stderr, "Failed ConnectNamedPipe\n");
1743 goto fail;
1744 }
1745
1746 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1747 if (!ret) {
1748 fprintf(stderr, "Failed GetOverlappedResult\n");
1749 if (ov.hEvent) {
1750 CloseHandle(ov.hEvent);
1751 ov.hEvent = NULL;
1752 }
1753 goto fail;
1754 }
1755
1756 if (ov.hEvent) {
1757 CloseHandle(ov.hEvent);
1758 ov.hEvent = NULL;
1759 }
1760 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1761 return 0;
1762
1763 fail:
1764 win_chr_close(chr);
1765 return -1;
1766 }
1767
1768
1769 static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts)
1770 {
1771 const char *filename = qemu_opt_get(opts, "path");
1772 CharDriverState *chr;
1773 WinCharState *s;
1774
1775 chr = g_malloc0(sizeof(CharDriverState));
1776 s = g_malloc0(sizeof(WinCharState));
1777 chr->opaque = s;
1778 chr->chr_write = win_chr_write;
1779 chr->chr_close = win_chr_close;
1780
1781 if (win_chr_pipe_init(chr, filename) < 0) {
1782 g_free(s);
1783 g_free(chr);
1784 return NULL;
1785 }
1786 qemu_chr_generic_open(chr);
1787 return chr;
1788 }
1789
1790 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1791 {
1792 CharDriverState *chr;
1793 WinCharState *s;
1794
1795 chr = g_malloc0(sizeof(CharDriverState));
1796 s = g_malloc0(sizeof(WinCharState));
1797 s->hcom = fd_out;
1798 chr->opaque = s;
1799 chr->chr_write = win_chr_write;
1800 qemu_chr_generic_open(chr);
1801 return chr;
1802 }
1803
1804 static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts)
1805 {
1806 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1807 }
1808
1809 static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts)
1810 {
1811 const char *file_out = qemu_opt_get(opts, "path");
1812 HANDLE fd_out;
1813
1814 fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1815 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1816 if (fd_out == INVALID_HANDLE_VALUE) {
1817 return NULL;
1818 }
1819
1820 return qemu_chr_open_win_file(fd_out);
1821 }
1822
1823 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1824 {
1825 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1826 DWORD dwSize;
1827 int len1;
1828
1829 len1 = len;
1830
1831 while (len1 > 0) {
1832 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1833 break;
1834 }
1835 buf += dwSize;
1836 len1 -= dwSize;
1837 }
1838
1839 return len - len1;
1840 }
1841
1842 static void win_stdio_wait_func(void *opaque)
1843 {
1844 CharDriverState *chr = opaque;
1845 WinStdioCharState *stdio = chr->opaque;
1846 INPUT_RECORD buf[4];
1847 int ret;
1848 DWORD dwSize;
1849 int i;
1850
1851 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
1852 &dwSize);
1853
1854 if (!ret) {
1855 /* Avoid error storm */
1856 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
1857 return;
1858 }
1859
1860 for (i = 0; i < dwSize; i++) {
1861 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
1862
1863 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
1864 int j;
1865 if (kev->uChar.AsciiChar != 0) {
1866 for (j = 0; j < kev->wRepeatCount; j++) {
1867 if (qemu_chr_be_can_write(chr)) {
1868 uint8_t c = kev->uChar.AsciiChar;
1869 qemu_chr_be_write(chr, &c, 1);
1870 }
1871 }
1872 }
1873 }
1874 }
1875 }
1876
1877 static DWORD WINAPI win_stdio_thread(LPVOID param)
1878 {
1879 CharDriverState *chr = param;
1880 WinStdioCharState *stdio = chr->opaque;
1881 int ret;
1882 DWORD dwSize;
1883
1884 while (1) {
1885
1886 /* Wait for one byte */
1887 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
1888
1889 /* Exit in case of error, continue if nothing read */
1890 if (!ret) {
1891 break;
1892 }
1893 if (!dwSize) {
1894 continue;
1895 }
1896
1897 /* Some terminal emulator returns \r\n for Enter, just pass \n */
1898 if (stdio->win_stdio_buf == '\r') {
1899 continue;
1900 }
1901
1902 /* Signal the main thread and wait until the byte was eaten */
1903 if (!SetEvent(stdio->hInputReadyEvent)) {
1904 break;
1905 }
1906 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
1907 != WAIT_OBJECT_0) {
1908 break;
1909 }
1910 }
1911
1912 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
1913 return 0;
1914 }
1915
1916 static void win_stdio_thread_wait_func(void *opaque)
1917 {
1918 CharDriverState *chr = opaque;
1919 WinStdioCharState *stdio = chr->opaque;
1920
1921 if (qemu_chr_be_can_write(chr)) {
1922 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
1923 }
1924
1925 SetEvent(stdio->hInputDoneEvent);
1926 }
1927
1928 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
1929 {
1930 WinStdioCharState *stdio = chr->opaque;
1931 DWORD dwMode = 0;
1932
1933 GetConsoleMode(stdio->hStdIn, &dwMode);
1934
1935 if (echo) {
1936 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
1937 } else {
1938 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
1939 }
1940 }
1941
1942 static void win_stdio_close(CharDriverState *chr)
1943 {
1944 WinStdioCharState *stdio = chr->opaque;
1945
1946 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
1947 CloseHandle(stdio->hInputReadyEvent);
1948 }
1949 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
1950 CloseHandle(stdio->hInputDoneEvent);
1951 }
1952 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
1953 TerminateThread(stdio->hInputThread, 0);
1954 }
1955
1956 g_free(chr->opaque);
1957 g_free(chr);
1958 stdio_nb_clients--;
1959 }
1960
1961 static CharDriverState *qemu_chr_open_win_stdio(QemuOpts *opts)
1962 {
1963 CharDriverState *chr;
1964 WinStdioCharState *stdio;
1965 DWORD dwMode;
1966 int is_console = 0;
1967
1968 if (stdio_nb_clients >= STDIO_MAX_CLIENTS
1969 || ((display_type != DT_NOGRAPHIC) && (stdio_nb_clients != 0))) {
1970 return NULL;
1971 }
1972
1973 chr = g_malloc0(sizeof(CharDriverState));
1974 stdio = g_malloc0(sizeof(WinStdioCharState));
1975
1976 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
1977 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
1978 fprintf(stderr, "cannot open stdio: invalid handle\n");
1979 exit(1);
1980 }
1981
1982 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
1983
1984 chr->opaque = stdio;
1985 chr->chr_write = win_stdio_write;
1986 chr->chr_close = win_stdio_close;
1987
1988 if (stdio_nb_clients == 0) {
1989 if (is_console) {
1990 if (qemu_add_wait_object(stdio->hStdIn,
1991 win_stdio_wait_func, chr)) {
1992 fprintf(stderr, "qemu_add_wait_object: failed\n");
1993 }
1994 } else {
1995 DWORD dwId;
1996
1997 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
1998 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
1999 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2000 chr, 0, &dwId);
2001
2002 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2003 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2004 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2005 fprintf(stderr, "cannot create stdio thread or event\n");
2006 exit(1);
2007 }
2008 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2009 win_stdio_thread_wait_func, chr)) {
2010 fprintf(stderr, "qemu_add_wait_object: failed\n");
2011 }
2012 }
2013 }
2014
2015 dwMode |= ENABLE_LINE_INPUT;
2016
2017 stdio_clients[stdio_nb_clients++] = chr;
2018 if (stdio_nb_clients == 1 && is_console) {
2019 /* set the terminal in raw mode */
2020 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2021 dwMode |= ENABLE_PROCESSED_INPUT;
2022 }
2023
2024 SetConsoleMode(stdio->hStdIn, dwMode);
2025
2026 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2027 qemu_chr_fe_set_echo(chr, false);
2028
2029 return chr;
2030 }
2031 #endif /* !_WIN32 */
2032
2033 /***********************************************************/
2034 /* UDP Net console */
2035
2036 typedef struct {
2037 int fd;
2038 uint8_t buf[READ_BUF_LEN];
2039 int bufcnt;
2040 int bufptr;
2041 int max_size;
2042 } NetCharDriver;
2043
2044 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2045 {
2046 NetCharDriver *s = chr->opaque;
2047
2048 return send(s->fd, (const void *)buf, len, 0);
2049 }
2050
2051 static int udp_chr_read_poll(void *opaque)
2052 {
2053 CharDriverState *chr = opaque;
2054 NetCharDriver *s = chr->opaque;
2055
2056 s->max_size = qemu_chr_be_can_write(chr);
2057
2058 /* If there were any stray characters in the queue process them
2059 * first
2060 */
2061 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2062 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2063 s->bufptr++;
2064 s->max_size = qemu_chr_be_can_write(chr);
2065 }
2066 return s->max_size;
2067 }
2068
2069 static void udp_chr_read(void *opaque)
2070 {
2071 CharDriverState *chr = opaque;
2072 NetCharDriver *s = chr->opaque;
2073
2074 if (s->max_size == 0)
2075 return;
2076 s->bufcnt = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0);
2077 s->bufptr = s->bufcnt;
2078 if (s->bufcnt <= 0)
2079 return;
2080
2081 s->bufptr = 0;
2082 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2083 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2084 s->bufptr++;
2085 s->max_size = qemu_chr_be_can_write(chr);
2086 }
2087 }
2088
2089 static void udp_chr_update_read_handler(CharDriverState *chr)
2090 {
2091 NetCharDriver *s = chr->opaque;
2092
2093 if (s->fd >= 0) {
2094 qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
2095 udp_chr_read, NULL, chr);
2096 }
2097 }
2098
2099 static void udp_chr_close(CharDriverState *chr)
2100 {
2101 NetCharDriver *s = chr->opaque;
2102 if (s->fd >= 0) {
2103 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2104 closesocket(s->fd);
2105 }
2106 g_free(s);
2107 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2108 }
2109
2110 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2111 {
2112 CharDriverState *chr = NULL;
2113 NetCharDriver *s = NULL;
2114 Error *local_err = NULL;
2115 int fd = -1;
2116
2117 chr = g_malloc0(sizeof(CharDriverState));
2118 s = g_malloc0(sizeof(NetCharDriver));
2119
2120 fd = inet_dgram_opts(opts, &local_err);
2121 if (fd < 0) {
2122 goto return_err;
2123 }
2124
2125 s->fd = fd;
2126 s->bufcnt = 0;
2127 s->bufptr = 0;
2128 chr->opaque = s;
2129 chr->chr_write = udp_chr_write;
2130 chr->chr_update_read_handler = udp_chr_update_read_handler;
2131 chr->chr_close = udp_chr_close;
2132 return chr;
2133
2134 return_err:
2135 if (local_err) {
2136 qerror_report_err(local_err);
2137 error_free(local_err);
2138 }
2139 g_free(chr);
2140 g_free(s);
2141 if (fd >= 0) {
2142 closesocket(fd);
2143 }
2144 return NULL;
2145 }
2146
2147 /***********************************************************/
2148 /* TCP Net console */
2149
2150 typedef struct {
2151 int fd, listen_fd;
2152 int connected;
2153 int max_size;
2154 int do_telnetopt;
2155 int do_nodelay;
2156 int is_unix;
2157 int msgfd;
2158 } TCPCharDriver;
2159
2160 static void tcp_chr_accept(void *opaque);
2161
2162 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2163 {
2164 TCPCharDriver *s = chr->opaque;
2165 if (s->connected) {
2166 return send_all(s->fd, buf, len);
2167 } else {
2168 /* XXX: indicate an error ? */
2169 return len;
2170 }
2171 }
2172
2173 static int tcp_chr_read_poll(void *opaque)
2174 {
2175 CharDriverState *chr = opaque;
2176 TCPCharDriver *s = chr->opaque;
2177 if (!s->connected)
2178 return 0;
2179 s->max_size = qemu_chr_be_can_write(chr);
2180 return s->max_size;
2181 }
2182
2183 #define IAC 255
2184 #define IAC_BREAK 243
2185 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2186 TCPCharDriver *s,
2187 uint8_t *buf, int *size)
2188 {
2189 /* Handle any telnet client's basic IAC options to satisfy char by
2190 * char mode with no echo. All IAC options will be removed from
2191 * the buf and the do_telnetopt variable will be used to track the
2192 * state of the width of the IAC information.
2193 *
2194 * IAC commands come in sets of 3 bytes with the exception of the
2195 * "IAC BREAK" command and the double IAC.
2196 */
2197
2198 int i;
2199 int j = 0;
2200
2201 for (i = 0; i < *size; i++) {
2202 if (s->do_telnetopt > 1) {
2203 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2204 /* Double IAC means send an IAC */
2205 if (j != i)
2206 buf[j] = buf[i];
2207 j++;
2208 s->do_telnetopt = 1;
2209 } else {
2210 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2211 /* Handle IAC break commands by sending a serial break */
2212 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2213 s->do_telnetopt++;
2214 }
2215 s->do_telnetopt++;
2216 }
2217 if (s->do_telnetopt >= 4) {
2218 s->do_telnetopt = 1;
2219 }
2220 } else {
2221 if ((unsigned char)buf[i] == IAC) {
2222 s->do_telnetopt = 2;
2223 } else {
2224 if (j != i)
2225 buf[j] = buf[i];
2226 j++;
2227 }
2228 }
2229 }
2230 *size = j;
2231 }
2232
2233 static int tcp_get_msgfd(CharDriverState *chr)
2234 {
2235 TCPCharDriver *s = chr->opaque;
2236 int fd = s->msgfd;
2237 s->msgfd = -1;
2238 return fd;
2239 }
2240
2241 #ifndef _WIN32
2242 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2243 {
2244 TCPCharDriver *s = chr->opaque;
2245 struct cmsghdr *cmsg;
2246
2247 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2248 int fd;
2249
2250 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2251 cmsg->cmsg_level != SOL_SOCKET ||
2252 cmsg->cmsg_type != SCM_RIGHTS)
2253 continue;
2254
2255 fd = *((int *)CMSG_DATA(cmsg));
2256 if (fd < 0)
2257 continue;
2258
2259 #ifndef MSG_CMSG_CLOEXEC
2260 qemu_set_cloexec(fd);
2261 #endif
2262 if (s->msgfd != -1)
2263 close(s->msgfd);
2264 s->msgfd = fd;
2265 }
2266 }
2267
2268 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2269 {
2270 TCPCharDriver *s = chr->opaque;
2271 struct msghdr msg = { NULL, };
2272 struct iovec iov[1];
2273 union {
2274 struct cmsghdr cmsg;
2275 char control[CMSG_SPACE(sizeof(int))];
2276 } msg_control;
2277 int flags = 0;
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 #ifdef MSG_CMSG_CLOEXEC
2289 flags |= MSG_CMSG_CLOEXEC;
2290 #endif
2291 ret = recvmsg(s->fd, &msg, flags);
2292 if (ret > 0 && s->is_unix) {
2293 unix_process_msgfd(chr, &msg);
2294 }
2295
2296 return ret;
2297 }
2298 #else
2299 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2300 {
2301 TCPCharDriver *s = chr->opaque;
2302 return qemu_recv(s->fd, buf, len, 0);
2303 }
2304 #endif
2305
2306 static void tcp_chr_read(void *opaque)
2307 {
2308 CharDriverState *chr = opaque;
2309 TCPCharDriver *s = chr->opaque;
2310 uint8_t buf[READ_BUF_LEN];
2311 int len, size;
2312
2313 if (!s->connected || s->max_size <= 0)
2314 return;
2315 len = sizeof(buf);
2316 if (len > s->max_size)
2317 len = s->max_size;
2318 size = tcp_chr_recv(chr, (void *)buf, len);
2319 if (size == 0) {
2320 /* connection closed */
2321 s->connected = 0;
2322 if (s->listen_fd >= 0) {
2323 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2324 }
2325 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2326 closesocket(s->fd);
2327 s->fd = -1;
2328 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2329 } else if (size > 0) {
2330 if (s->do_telnetopt)
2331 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2332 if (size > 0)
2333 qemu_chr_be_write(chr, buf, size);
2334 }
2335 }
2336
2337 #ifndef _WIN32
2338 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2339 {
2340 return qemu_chr_open_fd(eventfd, eventfd);
2341 }
2342 #endif
2343
2344 static void tcp_chr_connect(void *opaque)
2345 {
2346 CharDriverState *chr = opaque;
2347 TCPCharDriver *s = chr->opaque;
2348
2349 s->connected = 1;
2350 if (s->fd >= 0) {
2351 qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2352 tcp_chr_read, NULL, chr);
2353 }
2354 qemu_chr_generic_open(chr);
2355 }
2356
2357 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2358 static void tcp_chr_telnet_init(int fd)
2359 {
2360 char buf[3];
2361 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2362 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2363 send(fd, (char *)buf, 3, 0);
2364 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2365 send(fd, (char *)buf, 3, 0);
2366 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2367 send(fd, (char *)buf, 3, 0);
2368 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2369 send(fd, (char *)buf, 3, 0);
2370 }
2371
2372 static void socket_set_nodelay(int fd)
2373 {
2374 int val = 1;
2375 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2376 }
2377
2378 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2379 {
2380 TCPCharDriver *s = chr->opaque;
2381 if (s->fd != -1)
2382 return -1;
2383
2384 socket_set_nonblock(fd);
2385 if (s->do_nodelay)
2386 socket_set_nodelay(fd);
2387 s->fd = fd;
2388 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2389 tcp_chr_connect(chr);
2390
2391 return 0;
2392 }
2393
2394 static void tcp_chr_accept(void *opaque)
2395 {
2396 CharDriverState *chr = opaque;
2397 TCPCharDriver *s = chr->opaque;
2398 struct sockaddr_in saddr;
2399 #ifndef _WIN32
2400 struct sockaddr_un uaddr;
2401 #endif
2402 struct sockaddr *addr;
2403 socklen_t len;
2404 int fd;
2405
2406 for(;;) {
2407 #ifndef _WIN32
2408 if (s->is_unix) {
2409 len = sizeof(uaddr);
2410 addr = (struct sockaddr *)&uaddr;
2411 } else
2412 #endif
2413 {
2414 len = sizeof(saddr);
2415 addr = (struct sockaddr *)&saddr;
2416 }
2417 fd = qemu_accept(s->listen_fd, addr, &len);
2418 if (fd < 0 && errno != EINTR) {
2419 return;
2420 } else if (fd >= 0) {
2421 if (s->do_telnetopt)
2422 tcp_chr_telnet_init(fd);
2423 break;
2424 }
2425 }
2426 if (tcp_chr_add_client(chr, fd) < 0)
2427 close(fd);
2428 }
2429
2430 static void tcp_chr_close(CharDriverState *chr)
2431 {
2432 TCPCharDriver *s = chr->opaque;
2433 if (s->fd >= 0) {
2434 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2435 closesocket(s->fd);
2436 }
2437 if (s->listen_fd >= 0) {
2438 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2439 closesocket(s->listen_fd);
2440 }
2441 g_free(s);
2442 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2443 }
2444
2445 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2446 {
2447 CharDriverState *chr = NULL;
2448 TCPCharDriver *s = NULL;
2449 Error *local_err = NULL;
2450 int fd = -1;
2451 int is_listen;
2452 int is_waitconnect;
2453 int do_nodelay;
2454 int is_unix;
2455 int is_telnet;
2456
2457 is_listen = qemu_opt_get_bool(opts, "server", 0);
2458 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2459 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2460 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2461 is_unix = qemu_opt_get(opts, "path") != NULL;
2462 if (!is_listen)
2463 is_waitconnect = 0;
2464
2465 chr = g_malloc0(sizeof(CharDriverState));
2466 s = g_malloc0(sizeof(TCPCharDriver));
2467
2468 if (is_unix) {
2469 if (is_listen) {
2470 fd = unix_listen_opts(opts, &local_err);
2471 } else {
2472 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
2473 }
2474 } else {
2475 if (is_listen) {
2476 fd = inet_listen_opts(opts, 0, &local_err);
2477 } else {
2478 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
2479 }
2480 }
2481 if (fd < 0) {
2482 goto fail;
2483 }
2484
2485 if (!is_waitconnect)
2486 socket_set_nonblock(fd);
2487
2488 s->connected = 0;
2489 s->fd = -1;
2490 s->listen_fd = -1;
2491 s->msgfd = -1;
2492 s->is_unix = is_unix;
2493 s->do_nodelay = do_nodelay && !is_unix;
2494
2495 chr->opaque = s;
2496 chr->chr_write = tcp_chr_write;
2497 chr->chr_close = tcp_chr_close;
2498 chr->get_msgfd = tcp_get_msgfd;
2499 chr->chr_add_client = tcp_chr_add_client;
2500
2501 if (is_listen) {
2502 s->listen_fd = fd;
2503 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2504 if (is_telnet)
2505 s->do_telnetopt = 1;
2506
2507 } else {
2508 s->connected = 1;
2509 s->fd = fd;
2510 socket_set_nodelay(fd);
2511 tcp_chr_connect(chr);
2512 }
2513
2514 /* for "info chardev" monitor command */
2515 chr->filename = g_malloc(256);
2516 if (is_unix) {
2517 snprintf(chr->filename, 256, "unix:%s%s",
2518 qemu_opt_get(opts, "path"),
2519 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2520 } else if (is_telnet) {
2521 snprintf(chr->filename, 256, "telnet:%s:%s%s",
2522 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2523 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2524 } else {
2525 snprintf(chr->filename, 256, "tcp:%s:%s%s",
2526 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2527 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2528 }
2529
2530 if (is_listen && is_waitconnect) {
2531 printf("QEMU waiting for connection on: %s\n",
2532 chr->filename);
2533 tcp_chr_accept(chr);
2534 socket_set_nonblock(s->listen_fd);
2535 }
2536 return chr;
2537
2538 fail:
2539 if (local_err) {
2540 qerror_report_err(local_err);
2541 error_free(local_err);
2542 }
2543 if (fd >= 0) {
2544 closesocket(fd);
2545 }
2546 g_free(s);
2547 g_free(chr);
2548 return NULL;
2549 }
2550
2551 /***********************************************************/
2552 /* Memory chardev */
2553 typedef struct {
2554 size_t outbuf_size;
2555 size_t outbuf_capacity;
2556 uint8_t *outbuf;
2557 } MemoryDriver;
2558
2559 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2560 {
2561 MemoryDriver *d = chr->opaque;
2562
2563 /* TODO: the QString implementation has the same code, we should
2564 * introduce a generic way to do this in cutils.c */
2565 if (d->outbuf_capacity < d->outbuf_size + len) {
2566 /* grow outbuf */
2567 d->outbuf_capacity += len;
2568 d->outbuf_capacity *= 2;
2569 d->outbuf = g_realloc(d->outbuf, d->outbuf_capacity);
2570 }
2571
2572 memcpy(d->outbuf + d->outbuf_size, buf, len);
2573 d->outbuf_size += len;
2574
2575 return len;
2576 }
2577
2578 void qemu_chr_init_mem(CharDriverState *chr)
2579 {
2580 MemoryDriver *d;
2581
2582 d = g_malloc(sizeof(*d));
2583 d->outbuf_size = 0;
2584 d->outbuf_capacity = 4096;
2585 d->outbuf = g_malloc0(d->outbuf_capacity);
2586
2587 memset(chr, 0, sizeof(*chr));
2588 chr->opaque = d;
2589 chr->chr_write = mem_chr_write;
2590 }
2591
2592 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2593 {
2594 MemoryDriver *d = chr->opaque;
2595 return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2596 }
2597
2598 /* NOTE: this driver can not be closed with qemu_chr_delete()! */
2599 void qemu_chr_close_mem(CharDriverState *chr)
2600 {
2601 MemoryDriver *d = chr->opaque;
2602
2603 g_free(d->outbuf);
2604 g_free(chr->opaque);
2605 chr->opaque = NULL;
2606 chr->chr_write = NULL;
2607 }
2608
2609 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2610 {
2611 const MemoryDriver *d = chr->opaque;
2612 return d->outbuf_size;
2613 }
2614
2615 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2616 {
2617 char host[65], port[33], width[8], height[8];
2618 int pos;
2619 const char *p;
2620 QemuOpts *opts;
2621 Error *local_err = NULL;
2622
2623 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
2624 if (error_is_set(&local_err)) {
2625 qerror_report_err(local_err);
2626 error_free(local_err);
2627 return NULL;
2628 }
2629
2630 if (strstart(filename, "mon:", &p)) {
2631 filename = p;
2632 qemu_opt_set(opts, "mux", "on");
2633 }
2634
2635 if (strcmp(filename, "null") == 0 ||
2636 strcmp(filename, "pty") == 0 ||
2637 strcmp(filename, "msmouse") == 0 ||
2638 strcmp(filename, "braille") == 0 ||
2639 strcmp(filename, "stdio") == 0) {
2640 qemu_opt_set(opts, "backend", filename);
2641 return opts;
2642 }
2643 if (strstart(filename, "vc", &p)) {
2644 qemu_opt_set(opts, "backend", "vc");
2645 if (*p == ':') {
2646 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2647 /* pixels */
2648 qemu_opt_set(opts, "width", width);
2649 qemu_opt_set(opts, "height", height);
2650 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2651 /* chars */
2652 qemu_opt_set(opts, "cols", width);
2653 qemu_opt_set(opts, "rows", height);
2654 } else {
2655 goto fail;
2656 }
2657 }
2658 return opts;
2659 }
2660 if (strcmp(filename, "con:") == 0) {
2661 qemu_opt_set(opts, "backend", "console");
2662 return opts;
2663 }
2664 if (strstart(filename, "COM", NULL)) {
2665 qemu_opt_set(opts, "backend", "serial");
2666 qemu_opt_set(opts, "path", filename);
2667 return opts;
2668 }
2669 if (strstart(filename, "file:", &p)) {
2670 qemu_opt_set(opts, "backend", "file");
2671 qemu_opt_set(opts, "path", p);
2672 return opts;
2673 }
2674 if (strstart(filename, "pipe:", &p)) {
2675 qemu_opt_set(opts, "backend", "pipe");
2676 qemu_opt_set(opts, "path", p);
2677 return opts;
2678 }
2679 if (strstart(filename, "tcp:", &p) ||
2680 strstart(filename, "telnet:", &p)) {
2681 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2682 host[0] = 0;
2683 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2684 goto fail;
2685 }
2686 qemu_opt_set(opts, "backend", "socket");
2687 qemu_opt_set(opts, "host", host);
2688 qemu_opt_set(opts, "port", port);
2689 if (p[pos] == ',') {
2690 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2691 goto fail;
2692 }
2693 if (strstart(filename, "telnet:", &p))
2694 qemu_opt_set(opts, "telnet", "on");
2695 return opts;
2696 }
2697 if (strstart(filename, "udp:", &p)) {
2698 qemu_opt_set(opts, "backend", "udp");
2699 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2700 host[0] = 0;
2701 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2702 goto fail;
2703 }
2704 }
2705 qemu_opt_set(opts, "host", host);
2706 qemu_opt_set(opts, "port", port);
2707 if (p[pos] == '@') {
2708 p += pos + 1;
2709 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2710 host[0] = 0;
2711 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2712 goto fail;
2713 }
2714 }
2715 qemu_opt_set(opts, "localaddr", host);
2716 qemu_opt_set(opts, "localport", port);
2717 }
2718 return opts;
2719 }
2720 if (strstart(filename, "unix:", &p)) {
2721 qemu_opt_set(opts, "backend", "socket");
2722 if (qemu_opts_do_parse(opts, p, "path") != 0)
2723 goto fail;
2724 return opts;
2725 }
2726 if (strstart(filename, "/dev/parport", NULL) ||
2727 strstart(filename, "/dev/ppi", NULL)) {
2728 qemu_opt_set(opts, "backend", "parport");
2729 qemu_opt_set(opts, "path", filename);
2730 return opts;
2731 }
2732 if (strstart(filename, "/dev/", NULL)) {
2733 qemu_opt_set(opts, "backend", "tty");
2734 qemu_opt_set(opts, "path", filename);
2735 return opts;
2736 }
2737
2738 fail:
2739 qemu_opts_del(opts);
2740 return NULL;
2741 }
2742
2743 static const struct {
2744 const char *name;
2745 CharDriverState *(*open)(QemuOpts *opts);
2746 } backend_table[] = {
2747 { .name = "null", .open = qemu_chr_open_null },
2748 { .name = "socket", .open = qemu_chr_open_socket },
2749 { .name = "udp", .open = qemu_chr_open_udp },
2750 { .name = "msmouse", .open = qemu_chr_open_msmouse },
2751 { .name = "vc", .open = text_console_init },
2752 #ifdef _WIN32
2753 { .name = "file", .open = qemu_chr_open_win_file_out },
2754 { .name = "pipe", .open = qemu_chr_open_win_pipe },
2755 { .name = "console", .open = qemu_chr_open_win_con },
2756 { .name = "serial", .open = qemu_chr_open_win },
2757 { .name = "stdio", .open = qemu_chr_open_win_stdio },
2758 #else
2759 { .name = "file", .open = qemu_chr_open_file_out },
2760 { .name = "pipe", .open = qemu_chr_open_pipe },
2761 { .name = "stdio", .open = qemu_chr_open_stdio },
2762 #endif
2763 #ifdef CONFIG_BRLAPI
2764 { .name = "braille", .open = chr_baum_init },
2765 #endif
2766 #ifdef HAVE_CHARDEV_TTY
2767 { .name = "tty", .open = qemu_chr_open_tty },
2768 { .name = "pty", .open = qemu_chr_open_pty },
2769 #endif
2770 #ifdef HAVE_CHARDEV_PARPORT
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 Error **errp)
2784 {
2785 CharDriverState *chr;
2786 int i;
2787
2788 if (qemu_opts_id(opts) == NULL) {
2789 error_setg(errp, "chardev: no id specified\n");
2790 goto err;
2791 }
2792
2793 if (qemu_opt_get(opts, "backend") == NULL) {
2794 error_setg(errp, "chardev: \"%s\" missing backend\n",
2795 qemu_opts_id(opts));
2796 goto err;
2797 }
2798 for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2799 if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2800 break;
2801 }
2802 if (i == ARRAY_SIZE(backend_table)) {
2803 error_setg(errp, "chardev: backend \"%s\" not found\n",
2804 qemu_opt_get(opts, "backend"));
2805 goto err;
2806 }
2807
2808 chr = backend_table[i].open(opts);
2809 if (!chr) {
2810 error_setg(errp, "chardev: opening backend \"%s\" failed\n",
2811 qemu_opt_get(opts, "backend"));
2812 goto err;
2813 }
2814
2815 if (!chr->filename)
2816 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
2817 chr->init = init;
2818 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2819
2820 if (qemu_opt_get_bool(opts, "mux", 0)) {
2821 CharDriverState *base = chr;
2822 int len = strlen(qemu_opts_id(opts)) + 6;
2823 base->label = g_malloc(len);
2824 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
2825 chr = qemu_chr_open_mux(base);
2826 chr->filename = base->filename;
2827 chr->avail_connections = MAX_MUX;
2828 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2829 } else {
2830 chr->avail_connections = 1;
2831 }
2832 chr->label = g_strdup(qemu_opts_id(opts));
2833 chr->opts = opts;
2834 return chr;
2835
2836 err:
2837 qemu_opts_del(opts);
2838 return NULL;
2839 }
2840
2841 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2842 {
2843 const char *p;
2844 CharDriverState *chr;
2845 QemuOpts *opts;
2846 Error *err = NULL;
2847
2848 if (strstart(filename, "chardev:", &p)) {
2849 return qemu_chr_find(p);
2850 }
2851
2852 opts = qemu_chr_parse_compat(label, filename);
2853 if (!opts)
2854 return NULL;
2855
2856 chr = qemu_chr_new_from_opts(opts, init, &err);
2857 if (error_is_set(&err)) {
2858 fprintf(stderr, "%s\n", error_get_pretty(err));
2859 error_free(err);
2860 }
2861 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
2862 monitor_init(chr, MONITOR_USE_READLINE);
2863 }
2864 return chr;
2865 }
2866
2867 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
2868 {
2869 if (chr->chr_set_echo) {
2870 chr->chr_set_echo(chr, echo);
2871 }
2872 }
2873
2874 void qemu_chr_fe_open(struct CharDriverState *chr)
2875 {
2876 if (chr->chr_guest_open) {
2877 chr->chr_guest_open(chr);
2878 }
2879 }
2880
2881 void qemu_chr_fe_close(struct CharDriverState *chr)
2882 {
2883 if (chr->chr_guest_close) {
2884 chr->chr_guest_close(chr);
2885 }
2886 }
2887
2888 void qemu_chr_delete(CharDriverState *chr)
2889 {
2890 QTAILQ_REMOVE(&chardevs, chr, next);
2891 if (chr->chr_close) {
2892 chr->chr_close(chr);
2893 }
2894 g_free(chr->filename);
2895 g_free(chr->label);
2896 if (chr->opts) {
2897 qemu_opts_del(chr->opts);
2898 }
2899 g_free(chr);
2900 }
2901
2902 ChardevInfoList *qmp_query_chardev(Error **errp)
2903 {
2904 ChardevInfoList *chr_list = NULL;
2905 CharDriverState *chr;
2906
2907 QTAILQ_FOREACH(chr, &chardevs, next) {
2908 ChardevInfoList *info = g_malloc0(sizeof(*info));
2909 info->value = g_malloc0(sizeof(*info->value));
2910 info->value->label = g_strdup(chr->label);
2911 info->value->filename = g_strdup(chr->filename);
2912
2913 info->next = chr_list;
2914 chr_list = info;
2915 }
2916
2917 return chr_list;
2918 }
2919
2920 CharDriverState *qemu_chr_find(const char *name)
2921 {
2922 CharDriverState *chr;
2923
2924 QTAILQ_FOREACH(chr, &chardevs, next) {
2925 if (strcmp(chr->label, name) != 0)
2926 continue;
2927 return chr;
2928 }
2929 return NULL;
2930 }
2931
2932 /* Get a character (serial) device interface. */
2933 CharDriverState *qemu_char_get_next_serial(void)
2934 {
2935 static int next_serial;
2936
2937 /* FIXME: This function needs to go away: use chardev properties! */
2938 return serial_hds[next_serial++];
2939 }
2940
2941 QemuOptsList qemu_chardev_opts = {
2942 .name = "chardev",
2943 .implied_opt_name = "backend",
2944 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
2945 .desc = {
2946 {
2947 .name = "backend",
2948 .type = QEMU_OPT_STRING,
2949 },{
2950 .name = "path",
2951 .type = QEMU_OPT_STRING,
2952 },{
2953 .name = "host",
2954 .type = QEMU_OPT_STRING,
2955 },{
2956 .name = "port",
2957 .type = QEMU_OPT_STRING,
2958 },{
2959 .name = "localaddr",
2960 .type = QEMU_OPT_STRING,
2961 },{
2962 .name = "localport",
2963 .type = QEMU_OPT_STRING,
2964 },{
2965 .name = "to",
2966 .type = QEMU_OPT_NUMBER,
2967 },{
2968 .name = "ipv4",
2969 .type = QEMU_OPT_BOOL,
2970 },{
2971 .name = "ipv6",
2972 .type = QEMU_OPT_BOOL,
2973 },{
2974 .name = "wait",
2975 .type = QEMU_OPT_BOOL,
2976 },{
2977 .name = "server",
2978 .type = QEMU_OPT_BOOL,
2979 },{
2980 .name = "delay",
2981 .type = QEMU_OPT_BOOL,
2982 },{
2983 .name = "telnet",
2984 .type = QEMU_OPT_BOOL,
2985 },{
2986 .name = "width",
2987 .type = QEMU_OPT_NUMBER,
2988 },{
2989 .name = "height",
2990 .type = QEMU_OPT_NUMBER,
2991 },{
2992 .name = "cols",
2993 .type = QEMU_OPT_NUMBER,
2994 },{
2995 .name = "rows",
2996 .type = QEMU_OPT_NUMBER,
2997 },{
2998 .name = "mux",
2999 .type = QEMU_OPT_BOOL,
3000 },{
3001 .name = "signal",
3002 .type = QEMU_OPT_BOOL,
3003 },{
3004 .name = "name",
3005 .type = QEMU_OPT_STRING,
3006 },{
3007 .name = "debug",
3008 .type = QEMU_OPT_NUMBER,
3009 },
3010 { /* end of list */ }
3011 },
3012 };
3013
3014 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
3015 Error **errp)
3016 {
3017 ChardevReturn *ret = g_new0(ChardevReturn, 1);
3018 CharDriverState *chr = NULL;
3019
3020 chr = qemu_chr_find(id);
3021 if (chr) {
3022 error_setg(errp, "Chardev '%s' already exists", id);
3023 g_free(ret);
3024 return NULL;
3025 }
3026
3027 switch (backend->kind) {
3028 case CHARDEV_BACKEND_KIND_NULL:
3029 chr = qemu_chr_open_null(NULL);
3030 break;
3031 default:
3032 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
3033 break;
3034 }
3035
3036 if (chr == NULL && !error_is_set(errp)) {
3037 error_setg(errp, "Failed to create chardev");
3038 }
3039 if (chr) {
3040 chr->label = g_strdup(id);
3041 chr->avail_connections = 1;
3042 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3043 return ret;
3044 } else {
3045 g_free(ret);
3046 return NULL;
3047 }
3048 }
3049
3050 void qmp_chardev_remove(const char *id, Error **errp)
3051 {
3052 CharDriverState *chr;
3053
3054 chr = qemu_chr_find(id);
3055 if (NULL == chr) {
3056 error_setg(errp, "Chardev '%s' not found", id);
3057 return;
3058 }
3059 if (chr->chr_can_read || chr->chr_read ||
3060 chr->chr_event || chr->handler_opaque) {
3061 error_setg(errp, "Chardev '%s' is busy", id);
3062 return;
3063 }
3064 qemu_chr_delete(chr);
3065 }
Qemu copy for testing