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kvm: allow arbitrarily sized mmio ioeventfd
[qemu-kvm.git] / qemu-char.c
blobbb9e3f50a85e41e6cfe9603c84ca71183c48fd2e
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu-common.h"
25 #include "net.h"
26 #include "monitor.h"
27 #include "console.h"
28 #include "sysemu.h"
29 #include "qemu-timer.h"
30 #include "qemu-char.h"
31 #include "hw/usb.h"
32 #include "hw/baum.h"
33 #include "hw/msmouse.h"
34 #include "qmp-commands.h"
35
36 #include <unistd.h>
37 #include <fcntl.h>
38 #include <time.h>
39 #include <errno.h>
40 #include <sys/time.h>
41 #include <zlib.h>
42
43 #ifndef _WIN32
44 #include <sys/times.h>
45 #include <sys/wait.h>
46 #include <termios.h>
47 #include <sys/mman.h>
48 #include <sys/ioctl.h>
49 #include <sys/resource.h>
50 #include <sys/socket.h>
51 #include <netinet/in.h>
52 #include <net/if.h>
53 #include <arpa/inet.h>
54 #include <dirent.h>
55 #include <netdb.h>
56 #include <sys/select.h>
57 #ifdef CONFIG_BSD
58 #include <sys/stat.h>
59 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
60 #include <libutil.h>
61 #include <dev/ppbus/ppi.h>
62 #include <dev/ppbus/ppbconf.h>
63 #if defined(__GLIBC__)
64 #include <pty.h>
65 #endif
66 #elif defined(__DragonFly__)
67 #include <libutil.h>
68 #include <dev/misc/ppi/ppi.h>
69 #include <bus/ppbus/ppbconf.h>
70 #else
71 #include <util.h>
72 #endif
73 #else
74 #ifdef __linux__
75 #include <pty.h>
76
77 #include <linux/ppdev.h>
78 #include <linux/parport.h>
79 #endif
80 #ifdef __sun__
81 #include <sys/stat.h>
82 #include <sys/ethernet.h>
83 #include <sys/sockio.h>
84 #include <netinet/arp.h>
85 #include <netinet/in.h>
86 #include <netinet/in_systm.h>
87 #include <netinet/ip.h>
88 #include <netinet/ip_icmp.h> // must come after ip.h
89 #include <netinet/udp.h>
90 #include <netinet/tcp.h>
91 #include <net/if.h>
92 #include <syslog.h>
93 #include <stropts.h>
94 #endif
95 #endif
96 #endif
97
98 #include "qemu_socket.h"
99 #include "ui/qemu-spice.h"
100
101 #define READ_BUF_LEN 4096
102
103 /***********************************************************/
104 /* character device */
105
106 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
107 QTAILQ_HEAD_INITIALIZER(chardevs);
108
109 void qemu_chr_be_event(CharDriverState *s, int event)
110 {
111 /* Keep track if the char device is open */
112 switch (event) {
113 case CHR_EVENT_OPENED:
114 s->opened = 1;
115 break;
116 case CHR_EVENT_CLOSED:
117 s->opened = 0;
118 break;
119 }
120
121 if (!s->chr_event)
122 return;
123 s->chr_event(s->handler_opaque, event);
124 }
125
126 static void qemu_chr_generic_open_bh(void *opaque)
127 {
128 CharDriverState *s = opaque;
129 qemu_chr_be_event(s, CHR_EVENT_OPENED);
130 qemu_bh_delete(s->bh);
131 s->bh = NULL;
132 }
133
134 void qemu_chr_generic_open(CharDriverState *s)
135 {
136 if (s->bh == NULL) {
137 s->bh = qemu_bh_new(qemu_chr_generic_open_bh, s);
138 qemu_bh_schedule(s->bh);
139 }
140 }
141
142 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
143 {
144 return s->chr_write(s, buf, len);
145 }
146
147 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
148 {
149 if (!s->chr_ioctl)
150 return -ENOTSUP;
151 return s->chr_ioctl(s, cmd, arg);
152 }
153
154 int qemu_chr_be_can_write(CharDriverState *s)
155 {
156 if (!s->chr_can_read)
157 return 0;
158 return s->chr_can_read(s->handler_opaque);
159 }
160
161 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
162 {
163 s->chr_read(s->handler_opaque, buf, len);
164 }
165
166 int qemu_chr_fe_get_msgfd(CharDriverState *s)
167 {
168 return s->get_msgfd ? s->get_msgfd(s) : -1;
169 }
170
171 int qemu_chr_add_client(CharDriverState *s, int fd)
172 {
173 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
174 }
175
176 void qemu_chr_accept_input(CharDriverState *s)
177 {
178 if (s->chr_accept_input)
179 s->chr_accept_input(s);
180 }
181
182 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
183 {
184 char buf[READ_BUF_LEN];
185 va_list ap;
186 va_start(ap, fmt);
187 vsnprintf(buf, sizeof(buf), fmt, ap);
188 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
189 va_end(ap);
190 }
191
192 void qemu_chr_add_handlers(CharDriverState *s,
193 IOCanReadHandler *fd_can_read,
194 IOReadHandler *fd_read,
195 IOEventHandler *fd_event,
196 void *opaque)
197 {
198 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
199 /* chr driver being released. */
200 ++s->avail_connections;
201 }
202 s->chr_can_read = fd_can_read;
203 s->chr_read = fd_read;
204 s->chr_event = fd_event;
205 s->handler_opaque = opaque;
206 if (s->chr_update_read_handler)
207 s->chr_update_read_handler(s);
208
209 /* We're connecting to an already opened device, so let's make sure we
210 also get the open event */
211 if (s->opened) {
212 qemu_chr_generic_open(s);
213 }
214 }
215
216 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
217 {
218 return len;
219 }
220
221 static CharDriverState *qemu_chr_open_null(QemuOpts *opts)
222 {
223 CharDriverState *chr;
224
225 chr = g_malloc0(sizeof(CharDriverState));
226 chr->chr_write = null_chr_write;
227 return chr;
228 }
229
230 /* MUX driver for serial I/O splitting */
231 #define MAX_MUX 4
232 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
233 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
234 typedef struct {
235 IOCanReadHandler *chr_can_read[MAX_MUX];
236 IOReadHandler *chr_read[MAX_MUX];
237 IOEventHandler *chr_event[MAX_MUX];
238 void *ext_opaque[MAX_MUX];
239 CharDriverState *drv;
240 int focus;
241 int mux_cnt;
242 int term_got_escape;
243 int max_size;
244 /* Intermediate input buffer allows to catch escape sequences even if the
245 currently active device is not accepting any input - but only until it
246 is full as well. */
247 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
248 int prod[MAX_MUX];
249 int cons[MAX_MUX];
250 int timestamps;
251 int linestart;
252 int64_t timestamps_start;
253 } MuxDriver;
254
255
256 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
257 {
258 MuxDriver *d = chr->opaque;
259 int ret;
260 if (!d->timestamps) {
261 ret = d->drv->chr_write(d->drv, buf, len);
262 } else {
263 int i;
264
265 ret = 0;
266 for (i = 0; i < len; i++) {
267 if (d->linestart) {
268 char buf1[64];
269 int64_t ti;
270 int secs;
271
272 ti = qemu_get_clock_ms(rt_clock);
273 if (d->timestamps_start == -1)
274 d->timestamps_start = ti;
275 ti -= d->timestamps_start;
276 secs = ti / 1000;
277 snprintf(buf1, sizeof(buf1),
278 "[%02d:%02d:%02d.%03d] ",
279 secs / 3600,
280 (secs / 60) % 60,
281 secs % 60,
282 (int)(ti % 1000));
283 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
284 d->linestart = 0;
285 }
286 ret += d->drv->chr_write(d->drv, buf+i, 1);
287 if (buf[i] == '\n') {
288 d->linestart = 1;
289 }
290 }
291 }
292 return ret;
293 }
294
295 static const char * const mux_help[] = {
296 "% h print this help\n\r",
297 "% x exit emulator\n\r",
298 "% s save disk data back to file (if -snapshot)\n\r",
299 "% t toggle console timestamps\n\r"
300 "% b send break (magic sysrq)\n\r",
301 "% c switch between console and monitor\n\r",
302 "% % sends %\n\r",
303 NULL
304 };
305
306 int term_escape_char = 0x01; /* ctrl-a is used for escape */
307 static void mux_print_help(CharDriverState *chr)
308 {
309 int i, j;
310 char ebuf[15] = "Escape-Char";
311 char cbuf[50] = "\n\r";
312
313 if (term_escape_char > 0 && term_escape_char < 26) {
314 snprintf(cbuf, sizeof(cbuf), "\n\r");
315 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
316 } else {
317 snprintf(cbuf, sizeof(cbuf),
318 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
319 term_escape_char);
320 }
321 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
322 for (i = 0; mux_help[i] != NULL; i++) {
323 for (j=0; mux_help[i][j] != '\0'; j++) {
324 if (mux_help[i][j] == '%')
325 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
326 else
327 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
328 }
329 }
330 }
331
332 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
333 {
334 if (d->chr_event[mux_nr])
335 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
336 }
337
338 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
339 {
340 if (d->term_got_escape) {
341 d->term_got_escape = 0;
342 if (ch == term_escape_char)
343 goto send_char;
344 switch(ch) {
345 case '?':
346 case 'h':
347 mux_print_help(chr);
348 break;
349 case 'x':
350 {
351 const char *term = "QEMU: Terminated\n\r";
352 chr->chr_write(chr,(uint8_t *)term,strlen(term));
353 exit(0);
354 break;
355 }
356 case 's':
357 bdrv_commit_all();
358 break;
359 case 'b':
360 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
361 break;
362 case 'c':
363 /* Switch to the next registered device */
364 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
365 d->focus++;
366 if (d->focus >= d->mux_cnt)
367 d->focus = 0;
368 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
369 break;
370 case 't':
371 d->timestamps = !d->timestamps;
372 d->timestamps_start = -1;
373 d->linestart = 0;
374 break;
375 }
376 } else if (ch == term_escape_char) {
377 d->term_got_escape = 1;
378 } else {
379 send_char:
380 return 1;
381 }
382 return 0;
383 }
384
385 static void mux_chr_accept_input(CharDriverState *chr)
386 {
387 MuxDriver *d = chr->opaque;
388 int m = d->focus;
389
390 while (d->prod[m] != d->cons[m] &&
391 d->chr_can_read[m] &&
392 d->chr_can_read[m](d->ext_opaque[m])) {
393 d->chr_read[m](d->ext_opaque[m],
394 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
395 }
396 }
397
398 static int mux_chr_can_read(void *opaque)
399 {
400 CharDriverState *chr = opaque;
401 MuxDriver *d = chr->opaque;
402 int m = d->focus;
403
404 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
405 return 1;
406 if (d->chr_can_read[m])
407 return d->chr_can_read[m](d->ext_opaque[m]);
408 return 0;
409 }
410
411 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
412 {
413 CharDriverState *chr = opaque;
414 MuxDriver *d = chr->opaque;
415 int m = d->focus;
416 int i;
417
418 mux_chr_accept_input (opaque);
419
420 for(i = 0; i < size; i++)
421 if (mux_proc_byte(chr, d, buf[i])) {
422 if (d->prod[m] == d->cons[m] &&
423 d->chr_can_read[m] &&
424 d->chr_can_read[m](d->ext_opaque[m]))
425 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
426 else
427 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
428 }
429 }
430
431 static void mux_chr_event(void *opaque, int event)
432 {
433 CharDriverState *chr = opaque;
434 MuxDriver *d = chr->opaque;
435 int i;
436
437 /* Send the event to all registered listeners */
438 for (i = 0; i < d->mux_cnt; i++)
439 mux_chr_send_event(d, i, event);
440 }
441
442 static void mux_chr_update_read_handler(CharDriverState *chr)
443 {
444 MuxDriver *d = chr->opaque;
445
446 if (d->mux_cnt >= MAX_MUX) {
447 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
448 return;
449 }
450 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
451 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
452 d->chr_read[d->mux_cnt] = chr->chr_read;
453 d->chr_event[d->mux_cnt] = chr->chr_event;
454 /* Fix up the real driver with mux routines */
455 if (d->mux_cnt == 0) {
456 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
457 mux_chr_event, chr);
458 }
459 if (d->focus != -1) {
460 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
461 }
462 d->focus = d->mux_cnt;
463 d->mux_cnt++;
464 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
465 }
466
467 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
468 {
469 CharDriverState *chr;
470 MuxDriver *d;
471
472 chr = g_malloc0(sizeof(CharDriverState));
473 d = g_malloc0(sizeof(MuxDriver));
474
475 chr->opaque = d;
476 d->drv = drv;
477 d->focus = -1;
478 chr->chr_write = mux_chr_write;
479 chr->chr_update_read_handler = mux_chr_update_read_handler;
480 chr->chr_accept_input = mux_chr_accept_input;
481 /* Frontend guest-open / -close notification is not support with muxes */
482 chr->chr_guest_open = NULL;
483 chr->chr_guest_close = NULL;
484
485 /* Muxes are always open on creation */
486 qemu_chr_generic_open(chr);
487
488 return chr;
489 }
490
491
492 #ifdef _WIN32
493 int send_all(int fd, const void *buf, int len1)
494 {
495 int ret, len;
496
497 len = len1;
498 while (len > 0) {
499 ret = send(fd, buf, len, 0);
500 if (ret < 0) {
501 errno = WSAGetLastError();
502 if (errno != WSAEWOULDBLOCK) {
503 return -1;
504 }
505 } else if (ret == 0) {
506 break;
507 } else {
508 buf += ret;
509 len -= ret;
510 }
511 }
512 return len1 - len;
513 }
514
515 #else
516
517 int send_all(int fd, const void *_buf, int len1)
518 {
519 int ret, len;
520 const uint8_t *buf = _buf;
521
522 len = len1;
523 while (len > 0) {
524 ret = write(fd, buf, len);
525 if (ret < 0) {
526 if (errno != EINTR && errno != EAGAIN)
527 return -1;
528 } else if (ret == 0) {
529 break;
530 } else {
531 buf += ret;
532 len -= ret;
533 }
534 }
535 return len1 - len;
536 }
537 #endif /* !_WIN32 */
538
539 #define STDIO_MAX_CLIENTS 1
540 static int stdio_nb_clients;
541
542 #ifndef _WIN32
543
544 typedef struct {
545 int fd_in, fd_out;
546 int max_size;
547 } FDCharDriver;
548
549
550 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
551 {
552 FDCharDriver *s = chr->opaque;
553 return send_all(s->fd_out, buf, len);
554 }
555
556 static int fd_chr_read_poll(void *opaque)
557 {
558 CharDriverState *chr = opaque;
559 FDCharDriver *s = chr->opaque;
560
561 s->max_size = qemu_chr_be_can_write(chr);
562 return s->max_size;
563 }
564
565 static void fd_chr_read(void *opaque)
566 {
567 CharDriverState *chr = opaque;
568 FDCharDriver *s = chr->opaque;
569 int size, len;
570 uint8_t buf[READ_BUF_LEN];
571
572 len = sizeof(buf);
573 if (len > s->max_size)
574 len = s->max_size;
575 if (len == 0)
576 return;
577 size = read(s->fd_in, buf, len);
578 if (size == 0) {
579 /* FD has been closed. Remove it from the active list. */
580 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
581 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
582 return;
583 }
584 if (size > 0) {
585 qemu_chr_be_write(chr, buf, size);
586 }
587 }
588
589 static void fd_chr_update_read_handler(CharDriverState *chr)
590 {
591 FDCharDriver *s = chr->opaque;
592
593 if (s->fd_in >= 0) {
594 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
595 } else {
596 qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
597 fd_chr_read, NULL, chr);
598 }
599 }
600 }
601
602 static void fd_chr_close(struct CharDriverState *chr)
603 {
604 FDCharDriver *s = chr->opaque;
605
606 if (s->fd_in >= 0) {
607 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
608 } else {
609 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
610 }
611 }
612
613 g_free(s);
614 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
615 }
616
617 /* open a character device to a unix fd */
618 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
619 {
620 CharDriverState *chr;
621 FDCharDriver *s;
622
623 chr = g_malloc0(sizeof(CharDriverState));
624 s = g_malloc0(sizeof(FDCharDriver));
625 s->fd_in = fd_in;
626 s->fd_out = fd_out;
627 chr->opaque = s;
628 chr->chr_write = fd_chr_write;
629 chr->chr_update_read_handler = fd_chr_update_read_handler;
630 chr->chr_close = fd_chr_close;
631
632 qemu_chr_generic_open(chr);
633
634 return chr;
635 }
636
637 static CharDriverState *qemu_chr_open_file_out(QemuOpts *opts)
638 {
639 int fd_out;
640
641 TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
642 O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
643 if (fd_out < 0) {
644 return NULL;
645 }
646 return qemu_chr_open_fd(-1, fd_out);
647 }
648
649 static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts)
650 {
651 int fd_in, fd_out;
652 char filename_in[256], filename_out[256];
653 const char *filename = qemu_opt_get(opts, "path");
654
655 if (filename == NULL) {
656 fprintf(stderr, "chardev: pipe: no filename given\n");
657 return NULL;
658 }
659
660 snprintf(filename_in, 256, "%s.in", filename);
661 snprintf(filename_out, 256, "%s.out", filename);
662 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
663 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
664 if (fd_in < 0 || fd_out < 0) {
665 if (fd_in >= 0)
666 close(fd_in);
667 if (fd_out >= 0)
668 close(fd_out);
669 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
670 if (fd_in < 0) {
671 return NULL;
672 }
673 }
674 return qemu_chr_open_fd(fd_in, fd_out);
675 }
676
677
678 /* for STDIO, we handle the case where several clients use it
679 (nographic mode) */
680
681 #define TERM_FIFO_MAX_SIZE 1
682
683 static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
684 static int term_fifo_size;
685
686 static int stdio_read_poll(void *opaque)
687 {
688 CharDriverState *chr = opaque;
689
690 /* try to flush the queue if needed */
691 if (term_fifo_size != 0 && qemu_chr_be_can_write(chr) > 0) {
692 qemu_chr_be_write(chr, term_fifo, 1);
693 term_fifo_size = 0;
694 }
695 /* see if we can absorb more chars */
696 if (term_fifo_size == 0)
697 return 1;
698 else
699 return 0;
700 }
701
702 static void stdio_read(void *opaque)
703 {
704 int size;
705 uint8_t buf[1];
706 CharDriverState *chr = opaque;
707
708 size = read(0, buf, 1);
709 if (size == 0) {
710 /* stdin has been closed. Remove it from the active list. */
711 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
712 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
713 return;
714 }
715 if (size > 0) {
716 if (qemu_chr_be_can_write(chr) > 0) {
717 qemu_chr_be_write(chr, buf, 1);
718 } else if (term_fifo_size == 0) {
719 term_fifo[term_fifo_size++] = buf[0];
720 }
721 }
722 }
723
724 /* init terminal so that we can grab keys */
725 static struct termios oldtty;
726 static int old_fd0_flags;
727 static bool stdio_allow_signal;
728
729 static void term_exit(void)
730 {
731 tcsetattr (0, TCSANOW, &oldtty);
732 fcntl(0, F_SETFL, old_fd0_flags);
733 }
734
735 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
736 {
737 struct termios tty;
738
739 tty = oldtty;
740 if (!echo) {
741 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
742 |INLCR|IGNCR|ICRNL|IXON);
743 tty.c_oflag |= OPOST;
744 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
745 tty.c_cflag &= ~(CSIZE|PARENB);
746 tty.c_cflag |= CS8;
747 tty.c_cc[VMIN] = 1;
748 tty.c_cc[VTIME] = 0;
749 }
750 /* if graphical mode, we allow Ctrl-C handling */
751 if (!stdio_allow_signal)
752 tty.c_lflag &= ~ISIG;
753
754 tcsetattr (0, TCSANOW, &tty);
755 }
756
757 static void qemu_chr_close_stdio(struct CharDriverState *chr)
758 {
759 term_exit();
760 stdio_nb_clients--;
761 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
762 fd_chr_close(chr);
763 }
764
765 static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts)
766 {
767 CharDriverState *chr;
768
769 if (stdio_nb_clients >= STDIO_MAX_CLIENTS) {
770 return NULL;
771 }
772 if (stdio_nb_clients == 0) {
773 old_fd0_flags = fcntl(0, F_GETFL);
774 tcgetattr (0, &oldtty);
775 fcntl(0, F_SETFL, O_NONBLOCK);
776 atexit(term_exit);
777 }
778
779 chr = qemu_chr_open_fd(0, 1);
780 chr->chr_close = qemu_chr_close_stdio;
781 chr->chr_set_echo = qemu_chr_set_echo_stdio;
782 qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
783 stdio_nb_clients++;
784 stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
785 display_type != DT_NOGRAPHIC);
786 qemu_chr_fe_set_echo(chr, false);
787
788 return chr;
789 }
790
791 #ifdef __sun__
792 /* Once Solaris has openpty(), this is going to be removed. */
793 static int openpty(int *amaster, int *aslave, char *name,
794 struct termios *termp, struct winsize *winp)
795 {
796 const char *slave;
797 int mfd = -1, sfd = -1;
798
799 *amaster = *aslave = -1;
800
801 mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
802 if (mfd < 0)
803 goto err;
804
805 if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
806 goto err;
807
808 if ((slave = ptsname(mfd)) == NULL)
809 goto err;
810
811 if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
812 goto err;
813
814 if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
815 (termp != NULL && tcgetattr(sfd, termp) < 0))
816 goto err;
817
818 if (amaster)
819 *amaster = mfd;
820 if (aslave)
821 *aslave = sfd;
822 if (winp)
823 ioctl(sfd, TIOCSWINSZ, winp);
824
825 return 0;
826
827 err:
828 if (sfd != -1)
829 close(sfd);
830 close(mfd);
831 return -1;
832 }
833
834 static void cfmakeraw (struct termios *termios_p)
835 {
836 termios_p->c_iflag &=
837 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
838 termios_p->c_oflag &= ~OPOST;
839 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
840 termios_p->c_cflag &= ~(CSIZE|PARENB);
841 termios_p->c_cflag |= CS8;
842
843 termios_p->c_cc[VMIN] = 0;
844 termios_p->c_cc[VTIME] = 0;
845 }
846 #endif
847
848 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
849 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
850 || defined(__GLIBC__)
851
852 typedef struct {
853 int fd;
854 int connected;
855 int polling;
856 int read_bytes;
857 QEMUTimer *timer;
858 } PtyCharDriver;
859
860 static void pty_chr_update_read_handler(CharDriverState *chr);
861 static void pty_chr_state(CharDriverState *chr, int connected);
862
863 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
864 {
865 PtyCharDriver *s = chr->opaque;
866
867 if (!s->connected) {
868 /* guest sends data, check for (re-)connect */
869 pty_chr_update_read_handler(chr);
870 return 0;
871 }
872 return send_all(s->fd, buf, len);
873 }
874
875 static int pty_chr_read_poll(void *opaque)
876 {
877 CharDriverState *chr = opaque;
878 PtyCharDriver *s = chr->opaque;
879
880 s->read_bytes = qemu_chr_be_can_write(chr);
881 return s->read_bytes;
882 }
883
884 static void pty_chr_read(void *opaque)
885 {
886 CharDriverState *chr = opaque;
887 PtyCharDriver *s = chr->opaque;
888 int size, len;
889 uint8_t buf[READ_BUF_LEN];
890
891 len = sizeof(buf);
892 if (len > s->read_bytes)
893 len = s->read_bytes;
894 if (len == 0)
895 return;
896 size = read(s->fd, buf, len);
897 if ((size == -1 && errno == EIO) ||
898 (size == 0)) {
899 pty_chr_state(chr, 0);
900 return;
901 }
902 if (size > 0) {
903 pty_chr_state(chr, 1);
904 qemu_chr_be_write(chr, buf, size);
905 }
906 }
907
908 static void pty_chr_update_read_handler(CharDriverState *chr)
909 {
910 PtyCharDriver *s = chr->opaque;
911
912 qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
913 pty_chr_read, NULL, chr);
914 s->polling = 1;
915 /*
916 * Short timeout here: just need wait long enougth that qemu makes
917 * it through the poll loop once. When reconnected we want a
918 * short timeout so we notice it almost instantly. Otherwise
919 * read() gives us -EIO instantly, making pty_chr_state() reset the
920 * timeout to the normal (much longer) poll interval before the
921 * timer triggers.
922 */
923 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 10);
924 }
925
926 static void pty_chr_state(CharDriverState *chr, int connected)
927 {
928 PtyCharDriver *s = chr->opaque;
929
930 if (!connected) {
931 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
932 s->connected = 0;
933 s->polling = 0;
934 /* (re-)connect poll interval for idle guests: once per second.
935 * We check more frequently in case the guests sends data to
936 * the virtual device linked to our pty. */
937 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 1000);
938 } else {
939 if (!s->connected)
940 qemu_chr_generic_open(chr);
941 s->connected = 1;
942 }
943 }
944
945 static void pty_chr_timer(void *opaque)
946 {
947 struct CharDriverState *chr = opaque;
948 PtyCharDriver *s = chr->opaque;
949
950 if (s->connected)
951 return;
952 if (s->polling) {
953 /* If we arrive here without polling being cleared due
954 * read returning -EIO, then we are (re-)connected */
955 pty_chr_state(chr, 1);
956 return;
957 }
958
959 /* Next poll ... */
960 pty_chr_update_read_handler(chr);
961 }
962
963 static void pty_chr_close(struct CharDriverState *chr)
964 {
965 PtyCharDriver *s = chr->opaque;
966
967 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
968 close(s->fd);
969 qemu_del_timer(s->timer);
970 qemu_free_timer(s->timer);
971 g_free(s);
972 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
973 }
974
975 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
976 {
977 CharDriverState *chr;
978 PtyCharDriver *s;
979 struct termios tty;
980 int master_fd, slave_fd, len;
981 #if defined(__OpenBSD__) || defined(__DragonFly__)
982 char pty_name[PATH_MAX];
983 #define q_ptsname(x) pty_name
984 #else
985 char *pty_name = NULL;
986 #define q_ptsname(x) ptsname(x)
987 #endif
988
989 if (openpty(&master_fd, &slave_fd, pty_name, NULL, NULL) < 0) {
990 return NULL;
991 }
992
993 /* Set raw attributes on the pty. */
994 tcgetattr(slave_fd, &tty);
995 cfmakeraw(&tty);
996 tcsetattr(slave_fd, TCSAFLUSH, &tty);
997 close(slave_fd);
998
999 chr = g_malloc0(sizeof(CharDriverState));
1000
1001 len = strlen(q_ptsname(master_fd)) + 5;
1002 chr->filename = g_malloc(len);
1003 snprintf(chr->filename, len, "pty:%s", q_ptsname(master_fd));
1004 qemu_opt_set(opts, "path", q_ptsname(master_fd));
1005 fprintf(stderr, "char device redirected to %s\n", q_ptsname(master_fd));
1006
1007 s = g_malloc0(sizeof(PtyCharDriver));
1008 chr->opaque = s;
1009 chr->chr_write = pty_chr_write;
1010 chr->chr_update_read_handler = pty_chr_update_read_handler;
1011 chr->chr_close = pty_chr_close;
1012
1013 s->fd = master_fd;
1014 s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr);
1015
1016 return chr;
1017 }
1018
1019 static void tty_serial_init(int fd, int speed,
1020 int parity, int data_bits, int stop_bits)
1021 {
1022 struct termios tty;
1023 speed_t spd;
1024
1025 #if 0
1026 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1027 speed, parity, data_bits, stop_bits);
1028 #endif
1029 tcgetattr (fd, &tty);
1030
1031 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1032 speed = speed * 10 / 11;
1033 do {
1034 check_speed(50);
1035 check_speed(75);
1036 check_speed(110);
1037 check_speed(134);
1038 check_speed(150);
1039 check_speed(200);
1040 check_speed(300);
1041 check_speed(600);
1042 check_speed(1200);
1043 check_speed(1800);
1044 check_speed(2400);
1045 check_speed(4800);
1046 check_speed(9600);
1047 check_speed(19200);
1048 check_speed(38400);
1049 /* Non-Posix values follow. They may be unsupported on some systems. */
1050 check_speed(57600);
1051 check_speed(115200);
1052 #ifdef B230400
1053 check_speed(230400);
1054 #endif
1055 #ifdef B460800
1056 check_speed(460800);
1057 #endif
1058 #ifdef B500000
1059 check_speed(500000);
1060 #endif
1061 #ifdef B576000
1062 check_speed(576000);
1063 #endif
1064 #ifdef B921600
1065 check_speed(921600);
1066 #endif
1067 #ifdef B1000000
1068 check_speed(1000000);
1069 #endif
1070 #ifdef B1152000
1071 check_speed(1152000);
1072 #endif
1073 #ifdef B1500000
1074 check_speed(1500000);
1075 #endif
1076 #ifdef B2000000
1077 check_speed(2000000);
1078 #endif
1079 #ifdef B2500000
1080 check_speed(2500000);
1081 #endif
1082 #ifdef B3000000
1083 check_speed(3000000);
1084 #endif
1085 #ifdef B3500000
1086 check_speed(3500000);
1087 #endif
1088 #ifdef B4000000
1089 check_speed(4000000);
1090 #endif
1091 spd = B115200;
1092 } while (0);
1093
1094 cfsetispeed(&tty, spd);
1095 cfsetospeed(&tty, spd);
1096
1097 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1098 |INLCR|IGNCR|ICRNL|IXON);
1099 tty.c_oflag |= OPOST;
1100 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1101 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1102 switch(data_bits) {
1103 default:
1104 case 8:
1105 tty.c_cflag |= CS8;
1106 break;
1107 case 7:
1108 tty.c_cflag |= CS7;
1109 break;
1110 case 6:
1111 tty.c_cflag |= CS6;
1112 break;
1113 case 5:
1114 tty.c_cflag |= CS5;
1115 break;
1116 }
1117 switch(parity) {
1118 default:
1119 case 'N':
1120 break;
1121 case 'E':
1122 tty.c_cflag |= PARENB;
1123 break;
1124 case 'O':
1125 tty.c_cflag |= PARENB | PARODD;
1126 break;
1127 }
1128 if (stop_bits == 2)
1129 tty.c_cflag |= CSTOPB;
1130
1131 tcsetattr (fd, TCSANOW, &tty);
1132 }
1133
1134 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1135 {
1136 FDCharDriver *s = chr->opaque;
1137
1138 switch(cmd) {
1139 case CHR_IOCTL_SERIAL_SET_PARAMS:
1140 {
1141 QEMUSerialSetParams *ssp = arg;
1142 tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1143 ssp->data_bits, ssp->stop_bits);
1144 }
1145 break;
1146 case CHR_IOCTL_SERIAL_SET_BREAK:
1147 {
1148 int enable = *(int *)arg;
1149 if (enable)
1150 tcsendbreak(s->fd_in, 1);
1151 }
1152 break;
1153 case CHR_IOCTL_SERIAL_GET_TIOCM:
1154 {
1155 int sarg = 0;
1156 int *targ = (int *)arg;
1157 ioctl(s->fd_in, TIOCMGET, &sarg);
1158 *targ = 0;
1159 if (sarg & TIOCM_CTS)
1160 *targ |= CHR_TIOCM_CTS;
1161 if (sarg & TIOCM_CAR)
1162 *targ |= CHR_TIOCM_CAR;
1163 if (sarg & TIOCM_DSR)
1164 *targ |= CHR_TIOCM_DSR;
1165 if (sarg & TIOCM_RI)
1166 *targ |= CHR_TIOCM_RI;
1167 if (sarg & TIOCM_DTR)
1168 *targ |= CHR_TIOCM_DTR;
1169 if (sarg & TIOCM_RTS)
1170 *targ |= CHR_TIOCM_RTS;
1171 }
1172 break;
1173 case CHR_IOCTL_SERIAL_SET_TIOCM:
1174 {
1175 int sarg = *(int *)arg;
1176 int targ = 0;
1177 ioctl(s->fd_in, TIOCMGET, &targ);
1178 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1179 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1180 if (sarg & CHR_TIOCM_CTS)
1181 targ |= TIOCM_CTS;
1182 if (sarg & CHR_TIOCM_CAR)
1183 targ |= TIOCM_CAR;
1184 if (sarg & CHR_TIOCM_DSR)
1185 targ |= TIOCM_DSR;
1186 if (sarg & CHR_TIOCM_RI)
1187 targ |= TIOCM_RI;
1188 if (sarg & CHR_TIOCM_DTR)
1189 targ |= TIOCM_DTR;
1190 if (sarg & CHR_TIOCM_RTS)
1191 targ |= TIOCM_RTS;
1192 ioctl(s->fd_in, TIOCMSET, &targ);
1193 }
1194 break;
1195 default:
1196 return -ENOTSUP;
1197 }
1198 return 0;
1199 }
1200
1201 static void qemu_chr_close_tty(CharDriverState *chr)
1202 {
1203 FDCharDriver *s = chr->opaque;
1204 int fd = -1;
1205
1206 if (s) {
1207 fd = s->fd_in;
1208 }
1209
1210 fd_chr_close(chr);
1211
1212 if (fd >= 0) {
1213 close(fd);
1214 }
1215 }
1216
1217 static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
1218 {
1219 const char *filename = qemu_opt_get(opts, "path");
1220 CharDriverState *chr;
1221 int fd;
1222
1223 TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK));
1224 if (fd < 0) {
1225 return NULL;
1226 }
1227 tty_serial_init(fd, 115200, 'N', 8, 1);
1228 chr = qemu_chr_open_fd(fd, fd);
1229 chr->chr_ioctl = tty_serial_ioctl;
1230 chr->chr_close = qemu_chr_close_tty;
1231 return chr;
1232 }
1233 #else /* ! __linux__ && ! __sun__ */
1234 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
1235 {
1236 return NULL;
1237 }
1238 #endif /* __linux__ || __sun__ */
1239
1240 #if defined(__linux__)
1241 typedef struct {
1242 int fd;
1243 int mode;
1244 } ParallelCharDriver;
1245
1246 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1247 {
1248 if (s->mode != mode) {
1249 int m = mode;
1250 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1251 return 0;
1252 s->mode = mode;
1253 }
1254 return 1;
1255 }
1256
1257 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1258 {
1259 ParallelCharDriver *drv = chr->opaque;
1260 int fd = drv->fd;
1261 uint8_t b;
1262
1263 switch(cmd) {
1264 case CHR_IOCTL_PP_READ_DATA:
1265 if (ioctl(fd, PPRDATA, &b) < 0)
1266 return -ENOTSUP;
1267 *(uint8_t *)arg = b;
1268 break;
1269 case CHR_IOCTL_PP_WRITE_DATA:
1270 b = *(uint8_t *)arg;
1271 if (ioctl(fd, PPWDATA, &b) < 0)
1272 return -ENOTSUP;
1273 break;
1274 case CHR_IOCTL_PP_READ_CONTROL:
1275 if (ioctl(fd, PPRCONTROL, &b) < 0)
1276 return -ENOTSUP;
1277 /* Linux gives only the lowest bits, and no way to know data
1278 direction! For better compatibility set the fixed upper
1279 bits. */
1280 *(uint8_t *)arg = b | 0xc0;
1281 break;
1282 case CHR_IOCTL_PP_WRITE_CONTROL:
1283 b = *(uint8_t *)arg;
1284 if (ioctl(fd, PPWCONTROL, &b) < 0)
1285 return -ENOTSUP;
1286 break;
1287 case CHR_IOCTL_PP_READ_STATUS:
1288 if (ioctl(fd, PPRSTATUS, &b) < 0)
1289 return -ENOTSUP;
1290 *(uint8_t *)arg = b;
1291 break;
1292 case CHR_IOCTL_PP_DATA_DIR:
1293 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1294 return -ENOTSUP;
1295 break;
1296 case CHR_IOCTL_PP_EPP_READ_ADDR:
1297 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1298 struct ParallelIOArg *parg = arg;
1299 int n = read(fd, parg->buffer, parg->count);
1300 if (n != parg->count) {
1301 return -EIO;
1302 }
1303 }
1304 break;
1305 case CHR_IOCTL_PP_EPP_READ:
1306 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1307 struct ParallelIOArg *parg = arg;
1308 int n = read(fd, parg->buffer, parg->count);
1309 if (n != parg->count) {
1310 return -EIO;
1311 }
1312 }
1313 break;
1314 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1315 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1316 struct ParallelIOArg *parg = arg;
1317 int n = write(fd, parg->buffer, parg->count);
1318 if (n != parg->count) {
1319 return -EIO;
1320 }
1321 }
1322 break;
1323 case CHR_IOCTL_PP_EPP_WRITE:
1324 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1325 struct ParallelIOArg *parg = arg;
1326 int n = write(fd, parg->buffer, parg->count);
1327 if (n != parg->count) {
1328 return -EIO;
1329 }
1330 }
1331 break;
1332 default:
1333 return -ENOTSUP;
1334 }
1335 return 0;
1336 }
1337
1338 static void pp_close(CharDriverState *chr)
1339 {
1340 ParallelCharDriver *drv = chr->opaque;
1341 int fd = drv->fd;
1342
1343 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1344 ioctl(fd, PPRELEASE);
1345 close(fd);
1346 g_free(drv);
1347 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1348 }
1349
1350 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1351 {
1352 const char *filename = qemu_opt_get(opts, "path");
1353 CharDriverState *chr;
1354 ParallelCharDriver *drv;
1355 int fd;
1356
1357 TFR(fd = qemu_open(filename, O_RDWR));
1358 if (fd < 0) {
1359 return NULL;
1360 }
1361
1362 if (ioctl(fd, PPCLAIM) < 0) {
1363 close(fd);
1364 return NULL;
1365 }
1366
1367 drv = g_malloc0(sizeof(ParallelCharDriver));
1368 drv->fd = fd;
1369 drv->mode = IEEE1284_MODE_COMPAT;
1370
1371 chr = g_malloc0(sizeof(CharDriverState));
1372 chr->chr_write = null_chr_write;
1373 chr->chr_ioctl = pp_ioctl;
1374 chr->chr_close = pp_close;
1375 chr->opaque = drv;
1376
1377 qemu_chr_generic_open(chr);
1378
1379 return chr;
1380 }
1381 #endif /* __linux__ */
1382
1383 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1384 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1385 {
1386 int fd = (int)(intptr_t)chr->opaque;
1387 uint8_t b;
1388
1389 switch(cmd) {
1390 case CHR_IOCTL_PP_READ_DATA:
1391 if (ioctl(fd, PPIGDATA, &b) < 0)
1392 return -ENOTSUP;
1393 *(uint8_t *)arg = b;
1394 break;
1395 case CHR_IOCTL_PP_WRITE_DATA:
1396 b = *(uint8_t *)arg;
1397 if (ioctl(fd, PPISDATA, &b) < 0)
1398 return -ENOTSUP;
1399 break;
1400 case CHR_IOCTL_PP_READ_CONTROL:
1401 if (ioctl(fd, PPIGCTRL, &b) < 0)
1402 return -ENOTSUP;
1403 *(uint8_t *)arg = b;
1404 break;
1405 case CHR_IOCTL_PP_WRITE_CONTROL:
1406 b = *(uint8_t *)arg;
1407 if (ioctl(fd, PPISCTRL, &b) < 0)
1408 return -ENOTSUP;
1409 break;
1410 case CHR_IOCTL_PP_READ_STATUS:
1411 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1412 return -ENOTSUP;
1413 *(uint8_t *)arg = b;
1414 break;
1415 default:
1416 return -ENOTSUP;
1417 }
1418 return 0;
1419 }
1420
1421 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1422 {
1423 const char *filename = qemu_opt_get(opts, "path");
1424 CharDriverState *chr;
1425 int fd;
1426
1427 fd = qemu_open(filename, O_RDWR);
1428 if (fd < 0) {
1429 return NULL;
1430 }
1431
1432 chr = g_malloc0(sizeof(CharDriverState));
1433 chr->opaque = (void *)(intptr_t)fd;
1434 chr->chr_write = null_chr_write;
1435 chr->chr_ioctl = pp_ioctl;
1436 return chr;
1437 }
1438 #endif
1439
1440 #else /* _WIN32 */
1441
1442 static CharDriverState *stdio_clients[STDIO_MAX_CLIENTS];
1443
1444 typedef struct {
1445 int max_size;
1446 HANDLE hcom, hrecv, hsend;
1447 OVERLAPPED orecv, osend;
1448 BOOL fpipe;
1449 DWORD len;
1450 } WinCharState;
1451
1452 typedef struct {
1453 HANDLE hStdIn;
1454 HANDLE hInputReadyEvent;
1455 HANDLE hInputDoneEvent;
1456 HANDLE hInputThread;
1457 uint8_t win_stdio_buf;
1458 } WinStdioCharState;
1459
1460 #define NSENDBUF 2048
1461 #define NRECVBUF 2048
1462 #define MAXCONNECT 1
1463 #define NTIMEOUT 5000
1464
1465 static int win_chr_poll(void *opaque);
1466 static int win_chr_pipe_poll(void *opaque);
1467
1468 static void win_chr_close(CharDriverState *chr)
1469 {
1470 WinCharState *s = chr->opaque;
1471
1472 if (s->hsend) {
1473 CloseHandle(s->hsend);
1474 s->hsend = NULL;
1475 }
1476 if (s->hrecv) {
1477 CloseHandle(s->hrecv);
1478 s->hrecv = NULL;
1479 }
1480 if (s->hcom) {
1481 CloseHandle(s->hcom);
1482 s->hcom = NULL;
1483 }
1484 if (s->fpipe)
1485 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1486 else
1487 qemu_del_polling_cb(win_chr_poll, chr);
1488
1489 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1490 }
1491
1492 static int win_chr_init(CharDriverState *chr, const char *filename)
1493 {
1494 WinCharState *s = chr->opaque;
1495 COMMCONFIG comcfg;
1496 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1497 COMSTAT comstat;
1498 DWORD size;
1499 DWORD err;
1500
1501 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1502 if (!s->hsend) {
1503 fprintf(stderr, "Failed CreateEvent\n");
1504 goto fail;
1505 }
1506 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1507 if (!s->hrecv) {
1508 fprintf(stderr, "Failed CreateEvent\n");
1509 goto fail;
1510 }
1511
1512 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1513 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1514 if (s->hcom == INVALID_HANDLE_VALUE) {
1515 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1516 s->hcom = NULL;
1517 goto fail;
1518 }
1519
1520 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1521 fprintf(stderr, "Failed SetupComm\n");
1522 goto fail;
1523 }
1524
1525 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1526 size = sizeof(COMMCONFIG);
1527 GetDefaultCommConfig(filename, &comcfg, &size);
1528 comcfg.dcb.DCBlength = sizeof(DCB);
1529 CommConfigDialog(filename, NULL, &comcfg);
1530
1531 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1532 fprintf(stderr, "Failed SetCommState\n");
1533 goto fail;
1534 }
1535
1536 if (!SetCommMask(s->hcom, EV_ERR)) {
1537 fprintf(stderr, "Failed SetCommMask\n");
1538 goto fail;
1539 }
1540
1541 cto.ReadIntervalTimeout = MAXDWORD;
1542 if (!SetCommTimeouts(s->hcom, &cto)) {
1543 fprintf(stderr, "Failed SetCommTimeouts\n");
1544 goto fail;
1545 }
1546
1547 if (!ClearCommError(s->hcom, &err, &comstat)) {
1548 fprintf(stderr, "Failed ClearCommError\n");
1549 goto fail;
1550 }
1551 qemu_add_polling_cb(win_chr_poll, chr);
1552 return 0;
1553
1554 fail:
1555 win_chr_close(chr);
1556 return -1;
1557 }
1558
1559 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1560 {
1561 WinCharState *s = chr->opaque;
1562 DWORD len, ret, size, err;
1563
1564 len = len1;
1565 ZeroMemory(&s->osend, sizeof(s->osend));
1566 s->osend.hEvent = s->hsend;
1567 while (len > 0) {
1568 if (s->hsend)
1569 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1570 else
1571 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1572 if (!ret) {
1573 err = GetLastError();
1574 if (err == ERROR_IO_PENDING) {
1575 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1576 if (ret) {
1577 buf += size;
1578 len -= size;
1579 } else {
1580 break;
1581 }
1582 } else {
1583 break;
1584 }
1585 } else {
1586 buf += size;
1587 len -= size;
1588 }
1589 }
1590 return len1 - len;
1591 }
1592
1593 static int win_chr_read_poll(CharDriverState *chr)
1594 {
1595 WinCharState *s = chr->opaque;
1596
1597 s->max_size = qemu_chr_be_can_write(chr);
1598 return s->max_size;
1599 }
1600
1601 static void win_chr_readfile(CharDriverState *chr)
1602 {
1603 WinCharState *s = chr->opaque;
1604 int ret, err;
1605 uint8_t buf[READ_BUF_LEN];
1606 DWORD size;
1607
1608 ZeroMemory(&s->orecv, sizeof(s->orecv));
1609 s->orecv.hEvent = s->hrecv;
1610 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1611 if (!ret) {
1612 err = GetLastError();
1613 if (err == ERROR_IO_PENDING) {
1614 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1615 }
1616 }
1617
1618 if (size > 0) {
1619 qemu_chr_be_write(chr, buf, size);
1620 }
1621 }
1622
1623 static void win_chr_read(CharDriverState *chr)
1624 {
1625 WinCharState *s = chr->opaque;
1626
1627 if (s->len > s->max_size)
1628 s->len = s->max_size;
1629 if (s->len == 0)
1630 return;
1631
1632 win_chr_readfile(chr);
1633 }
1634
1635 static int win_chr_poll(void *opaque)
1636 {
1637 CharDriverState *chr = opaque;
1638 WinCharState *s = chr->opaque;
1639 COMSTAT status;
1640 DWORD comerr;
1641
1642 ClearCommError(s->hcom, &comerr, &status);
1643 if (status.cbInQue > 0) {
1644 s->len = status.cbInQue;
1645 win_chr_read_poll(chr);
1646 win_chr_read(chr);
1647 return 1;
1648 }
1649 return 0;
1650 }
1651
1652 static CharDriverState *qemu_chr_open_win(QemuOpts *opts)
1653 {
1654 const char *filename = qemu_opt_get(opts, "path");
1655 CharDriverState *chr;
1656 WinCharState *s;
1657
1658 chr = g_malloc0(sizeof(CharDriverState));
1659 s = g_malloc0(sizeof(WinCharState));
1660 chr->opaque = s;
1661 chr->chr_write = win_chr_write;
1662 chr->chr_close = win_chr_close;
1663
1664 if (win_chr_init(chr, filename) < 0) {
1665 g_free(s);
1666 g_free(chr);
1667 return NULL;
1668 }
1669 qemu_chr_generic_open(chr);
1670 return chr;
1671 }
1672
1673 static int win_chr_pipe_poll(void *opaque)
1674 {
1675 CharDriverState *chr = opaque;
1676 WinCharState *s = chr->opaque;
1677 DWORD size;
1678
1679 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1680 if (size > 0) {
1681 s->len = size;
1682 win_chr_read_poll(chr);
1683 win_chr_read(chr);
1684 return 1;
1685 }
1686 return 0;
1687 }
1688
1689 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1690 {
1691 WinCharState *s = chr->opaque;
1692 OVERLAPPED ov;
1693 int ret;
1694 DWORD size;
1695 char openname[256];
1696
1697 s->fpipe = TRUE;
1698
1699 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1700 if (!s->hsend) {
1701 fprintf(stderr, "Failed CreateEvent\n");
1702 goto fail;
1703 }
1704 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1705 if (!s->hrecv) {
1706 fprintf(stderr, "Failed CreateEvent\n");
1707 goto fail;
1708 }
1709
1710 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1711 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1712 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1713 PIPE_WAIT,
1714 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1715 if (s->hcom == INVALID_HANDLE_VALUE) {
1716 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1717 s->hcom = NULL;
1718 goto fail;
1719 }
1720
1721 ZeroMemory(&ov, sizeof(ov));
1722 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1723 ret = ConnectNamedPipe(s->hcom, &ov);
1724 if (ret) {
1725 fprintf(stderr, "Failed ConnectNamedPipe\n");
1726 goto fail;
1727 }
1728
1729 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1730 if (!ret) {
1731 fprintf(stderr, "Failed GetOverlappedResult\n");
1732 if (ov.hEvent) {
1733 CloseHandle(ov.hEvent);
1734 ov.hEvent = NULL;
1735 }
1736 goto fail;
1737 }
1738
1739 if (ov.hEvent) {
1740 CloseHandle(ov.hEvent);
1741 ov.hEvent = NULL;
1742 }
1743 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1744 return 0;
1745
1746 fail:
1747 win_chr_close(chr);
1748 return -1;
1749 }
1750
1751
1752 static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts)
1753 {
1754 const char *filename = qemu_opt_get(opts, "path");
1755 CharDriverState *chr;
1756 WinCharState *s;
1757
1758 chr = g_malloc0(sizeof(CharDriverState));
1759 s = g_malloc0(sizeof(WinCharState));
1760 chr->opaque = s;
1761 chr->chr_write = win_chr_write;
1762 chr->chr_close = win_chr_close;
1763
1764 if (win_chr_pipe_init(chr, filename) < 0) {
1765 g_free(s);
1766 g_free(chr);
1767 return NULL;
1768 }
1769 qemu_chr_generic_open(chr);
1770 return chr;
1771 }
1772
1773 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1774 {
1775 CharDriverState *chr;
1776 WinCharState *s;
1777
1778 chr = g_malloc0(sizeof(CharDriverState));
1779 s = g_malloc0(sizeof(WinCharState));
1780 s->hcom = fd_out;
1781 chr->opaque = s;
1782 chr->chr_write = win_chr_write;
1783 qemu_chr_generic_open(chr);
1784 return chr;
1785 }
1786
1787 static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts)
1788 {
1789 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1790 }
1791
1792 static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts)
1793 {
1794 const char *file_out = qemu_opt_get(opts, "path");
1795 HANDLE fd_out;
1796
1797 fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1798 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1799 if (fd_out == INVALID_HANDLE_VALUE) {
1800 return NULL;
1801 }
1802
1803 return qemu_chr_open_win_file(fd_out);
1804 }
1805
1806 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1807 {
1808 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1809 DWORD dwSize;
1810 int len1;
1811
1812 len1 = len;
1813
1814 while (len1 > 0) {
1815 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1816 break;
1817 }
1818 buf += dwSize;
1819 len1 -= dwSize;
1820 }
1821
1822 return len - len1;
1823 }
1824
1825 static void win_stdio_wait_func(void *opaque)
1826 {
1827 CharDriverState *chr = opaque;
1828 WinStdioCharState *stdio = chr->opaque;
1829 INPUT_RECORD buf[4];
1830 int ret;
1831 DWORD dwSize;
1832 int i;
1833
1834 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
1835 &dwSize);
1836
1837 if (!ret) {
1838 /* Avoid error storm */
1839 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
1840 return;
1841 }
1842
1843 for (i = 0; i < dwSize; i++) {
1844 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
1845
1846 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
1847 int j;
1848 if (kev->uChar.AsciiChar != 0) {
1849 for (j = 0; j < kev->wRepeatCount; j++) {
1850 if (qemu_chr_be_can_write(chr)) {
1851 uint8_t c = kev->uChar.AsciiChar;
1852 qemu_chr_be_write(chr, &c, 1);
1853 }
1854 }
1855 }
1856 }
1857 }
1858 }
1859
1860 static DWORD WINAPI win_stdio_thread(LPVOID param)
1861 {
1862 CharDriverState *chr = param;
1863 WinStdioCharState *stdio = chr->opaque;
1864 int ret;
1865 DWORD dwSize;
1866
1867 while (1) {
1868
1869 /* Wait for one byte */
1870 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
1871
1872 /* Exit in case of error, continue if nothing read */
1873 if (!ret) {
1874 break;
1875 }
1876 if (!dwSize) {
1877 continue;
1878 }
1879
1880 /* Some terminal emulator returns \r\n for Enter, just pass \n */
1881 if (stdio->win_stdio_buf == '\r') {
1882 continue;
1883 }
1884
1885 /* Signal the main thread and wait until the byte was eaten */
1886 if (!SetEvent(stdio->hInputReadyEvent)) {
1887 break;
1888 }
1889 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
1890 != WAIT_OBJECT_0) {
1891 break;
1892 }
1893 }
1894
1895 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
1896 return 0;
1897 }
1898
1899 static void win_stdio_thread_wait_func(void *opaque)
1900 {
1901 CharDriverState *chr = opaque;
1902 WinStdioCharState *stdio = chr->opaque;
1903
1904 if (qemu_chr_be_can_write(chr)) {
1905 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
1906 }
1907
1908 SetEvent(stdio->hInputDoneEvent);
1909 }
1910
1911 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
1912 {
1913 WinStdioCharState *stdio = chr->opaque;
1914 DWORD dwMode = 0;
1915
1916 GetConsoleMode(stdio->hStdIn, &dwMode);
1917
1918 if (echo) {
1919 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
1920 } else {
1921 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
1922 }
1923 }
1924
1925 static void win_stdio_close(CharDriverState *chr)
1926 {
1927 WinStdioCharState *stdio = chr->opaque;
1928
1929 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
1930 CloseHandle(stdio->hInputReadyEvent);
1931 }
1932 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
1933 CloseHandle(stdio->hInputDoneEvent);
1934 }
1935 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
1936 TerminateThread(stdio->hInputThread, 0);
1937 }
1938
1939 g_free(chr->opaque);
1940 g_free(chr);
1941 stdio_nb_clients--;
1942 }
1943
1944 static CharDriverState *qemu_chr_open_win_stdio(QemuOpts *opts)
1945 {
1946 CharDriverState *chr;
1947 WinStdioCharState *stdio;
1948 DWORD dwMode;
1949 int is_console = 0;
1950
1951 if (stdio_nb_clients >= STDIO_MAX_CLIENTS
1952 || ((display_type != DT_NOGRAPHIC) && (stdio_nb_clients != 0))) {
1953 return NULL;
1954 }
1955
1956 chr = g_malloc0(sizeof(CharDriverState));
1957 stdio = g_malloc0(sizeof(WinStdioCharState));
1958
1959 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
1960 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
1961 fprintf(stderr, "cannot open stdio: invalid handle\n");
1962 exit(1);
1963 }
1964
1965 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
1966
1967 chr->opaque = stdio;
1968 chr->chr_write = win_stdio_write;
1969 chr->chr_close = win_stdio_close;
1970
1971 if (stdio_nb_clients == 0) {
1972 if (is_console) {
1973 if (qemu_add_wait_object(stdio->hStdIn,
1974 win_stdio_wait_func, chr)) {
1975 fprintf(stderr, "qemu_add_wait_object: failed\n");
1976 }
1977 } else {
1978 DWORD dwId;
1979
1980 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
1981 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
1982 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
1983 chr, 0, &dwId);
1984
1985 if (stdio->hInputThread == INVALID_HANDLE_VALUE
1986 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
1987 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
1988 fprintf(stderr, "cannot create stdio thread or event\n");
1989 exit(1);
1990 }
1991 if (qemu_add_wait_object(stdio->hInputReadyEvent,
1992 win_stdio_thread_wait_func, chr)) {
1993 fprintf(stderr, "qemu_add_wait_object: failed\n");
1994 }
1995 }
1996 }
1997
1998 dwMode |= ENABLE_LINE_INPUT;
1999
2000 stdio_clients[stdio_nb_clients++] = chr;
2001 if (stdio_nb_clients == 1 && is_console) {
2002 /* set the terminal in raw mode */
2003 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2004 dwMode |= ENABLE_PROCESSED_INPUT;
2005 }
2006
2007 SetConsoleMode(stdio->hStdIn, dwMode);
2008
2009 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2010 qemu_chr_fe_set_echo(chr, false);
2011
2012 return chr;
2013 }
2014 #endif /* !_WIN32 */
2015
2016 /***********************************************************/
2017 /* UDP Net console */
2018
2019 typedef struct {
2020 int fd;
2021 uint8_t buf[READ_BUF_LEN];
2022 int bufcnt;
2023 int bufptr;
2024 int max_size;
2025 } NetCharDriver;
2026
2027 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2028 {
2029 NetCharDriver *s = chr->opaque;
2030
2031 return send(s->fd, (const void *)buf, len, 0);
2032 }
2033
2034 static int udp_chr_read_poll(void *opaque)
2035 {
2036 CharDriverState *chr = opaque;
2037 NetCharDriver *s = chr->opaque;
2038
2039 s->max_size = qemu_chr_be_can_write(chr);
2040
2041 /* If there were any stray characters in the queue process them
2042 * first
2043 */
2044 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2045 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2046 s->bufptr++;
2047 s->max_size = qemu_chr_be_can_write(chr);
2048 }
2049 return s->max_size;
2050 }
2051
2052 static void udp_chr_read(void *opaque)
2053 {
2054 CharDriverState *chr = opaque;
2055 NetCharDriver *s = chr->opaque;
2056
2057 if (s->max_size == 0)
2058 return;
2059 s->bufcnt = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0);
2060 s->bufptr = s->bufcnt;
2061 if (s->bufcnt <= 0)
2062 return;
2063
2064 s->bufptr = 0;
2065 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2066 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2067 s->bufptr++;
2068 s->max_size = qemu_chr_be_can_write(chr);
2069 }
2070 }
2071
2072 static void udp_chr_update_read_handler(CharDriverState *chr)
2073 {
2074 NetCharDriver *s = chr->opaque;
2075
2076 if (s->fd >= 0) {
2077 qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
2078 udp_chr_read, NULL, chr);
2079 }
2080 }
2081
2082 static void udp_chr_close(CharDriverState *chr)
2083 {
2084 NetCharDriver *s = chr->opaque;
2085 if (s->fd >= 0) {
2086 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2087 closesocket(s->fd);
2088 }
2089 g_free(s);
2090 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2091 }
2092
2093 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2094 {
2095 CharDriverState *chr = NULL;
2096 NetCharDriver *s = NULL;
2097 int fd = -1;
2098
2099 chr = g_malloc0(sizeof(CharDriverState));
2100 s = g_malloc0(sizeof(NetCharDriver));
2101
2102 fd = inet_dgram_opts(opts);
2103 if (fd < 0) {
2104 fprintf(stderr, "inet_dgram_opts failed\n");
2105 goto return_err;
2106 }
2107
2108 s->fd = fd;
2109 s->bufcnt = 0;
2110 s->bufptr = 0;
2111 chr->opaque = s;
2112 chr->chr_write = udp_chr_write;
2113 chr->chr_update_read_handler = udp_chr_update_read_handler;
2114 chr->chr_close = udp_chr_close;
2115 return chr;
2116
2117 return_err:
2118 g_free(chr);
2119 g_free(s);
2120 if (fd >= 0) {
2121 closesocket(fd);
2122 }
2123 return NULL;
2124 }
2125
2126 /***********************************************************/
2127 /* TCP Net console */
2128
2129 typedef struct {
2130 int fd, listen_fd;
2131 int connected;
2132 int max_size;
2133 int do_telnetopt;
2134 int do_nodelay;
2135 int is_unix;
2136 int msgfd;
2137 } TCPCharDriver;
2138
2139 static void tcp_chr_accept(void *opaque);
2140
2141 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2142 {
2143 TCPCharDriver *s = chr->opaque;
2144 if (s->connected) {
2145 return send_all(s->fd, buf, len);
2146 } else {
2147 /* XXX: indicate an error ? */
2148 return len;
2149 }
2150 }
2151
2152 static int tcp_chr_read_poll(void *opaque)
2153 {
2154 CharDriverState *chr = opaque;
2155 TCPCharDriver *s = chr->opaque;
2156 if (!s->connected)
2157 return 0;
2158 s->max_size = qemu_chr_be_can_write(chr);
2159 return s->max_size;
2160 }
2161
2162 #define IAC 255
2163 #define IAC_BREAK 243
2164 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2165 TCPCharDriver *s,
2166 uint8_t *buf, int *size)
2167 {
2168 /* Handle any telnet client's basic IAC options to satisfy char by
2169 * char mode with no echo. All IAC options will be removed from
2170 * the buf and the do_telnetopt variable will be used to track the
2171 * state of the width of the IAC information.
2172 *
2173 * IAC commands come in sets of 3 bytes with the exception of the
2174 * "IAC BREAK" command and the double IAC.
2175 */
2176
2177 int i;
2178 int j = 0;
2179
2180 for (i = 0; i < *size; i++) {
2181 if (s->do_telnetopt > 1) {
2182 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2183 /* Double IAC means send an IAC */
2184 if (j != i)
2185 buf[j] = buf[i];
2186 j++;
2187 s->do_telnetopt = 1;
2188 } else {
2189 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2190 /* Handle IAC break commands by sending a serial break */
2191 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2192 s->do_telnetopt++;
2193 }
2194 s->do_telnetopt++;
2195 }
2196 if (s->do_telnetopt >= 4) {
2197 s->do_telnetopt = 1;
2198 }
2199 } else {
2200 if ((unsigned char)buf[i] == IAC) {
2201 s->do_telnetopt = 2;
2202 } else {
2203 if (j != i)
2204 buf[j] = buf[i];
2205 j++;
2206 }
2207 }
2208 }
2209 *size = j;
2210 }
2211
2212 static int tcp_get_msgfd(CharDriverState *chr)
2213 {
2214 TCPCharDriver *s = chr->opaque;
2215 int fd = s->msgfd;
2216 s->msgfd = -1;
2217 return fd;
2218 }
2219
2220 #ifndef _WIN32
2221 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2222 {
2223 TCPCharDriver *s = chr->opaque;
2224 struct cmsghdr *cmsg;
2225
2226 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2227 int fd;
2228
2229 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2230 cmsg->cmsg_level != SOL_SOCKET ||
2231 cmsg->cmsg_type != SCM_RIGHTS)
2232 continue;
2233
2234 fd = *((int *)CMSG_DATA(cmsg));
2235 if (fd < 0)
2236 continue;
2237
2238 if (s->msgfd != -1)
2239 close(s->msgfd);
2240 s->msgfd = fd;
2241 }
2242 }
2243
2244 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2245 {
2246 TCPCharDriver *s = chr->opaque;
2247 struct msghdr msg = { NULL, };
2248 struct iovec iov[1];
2249 union {
2250 struct cmsghdr cmsg;
2251 char control[CMSG_SPACE(sizeof(int))];
2252 } msg_control;
2253 ssize_t ret;
2254
2255 iov[0].iov_base = buf;
2256 iov[0].iov_len = len;
2257
2258 msg.msg_iov = iov;
2259 msg.msg_iovlen = 1;
2260 msg.msg_control = &msg_control;
2261 msg.msg_controllen = sizeof(msg_control);
2262
2263 ret = recvmsg(s->fd, &msg, 0);
2264 if (ret > 0 && s->is_unix)
2265 unix_process_msgfd(chr, &msg);
2266
2267 return ret;
2268 }
2269 #else
2270 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2271 {
2272 TCPCharDriver *s = chr->opaque;
2273 return qemu_recv(s->fd, buf, len, 0);
2274 }
2275 #endif
2276
2277 static void tcp_chr_read(void *opaque)
2278 {
2279 CharDriverState *chr = opaque;
2280 TCPCharDriver *s = chr->opaque;
2281 uint8_t buf[READ_BUF_LEN];
2282 int len, size;
2283
2284 if (!s->connected || s->max_size <= 0)
2285 return;
2286 len = sizeof(buf);
2287 if (len > s->max_size)
2288 len = s->max_size;
2289 size = tcp_chr_recv(chr, (void *)buf, len);
2290 if (size == 0) {
2291 /* connection closed */
2292 s->connected = 0;
2293 if (s->listen_fd >= 0) {
2294 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2295 }
2296 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2297 closesocket(s->fd);
2298 s->fd = -1;
2299 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2300 } else if (size > 0) {
2301 if (s->do_telnetopt)
2302 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2303 if (size > 0)
2304 qemu_chr_be_write(chr, buf, size);
2305 }
2306 }
2307
2308 #ifndef _WIN32
2309 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2310 {
2311 return qemu_chr_open_fd(eventfd, eventfd);
2312 }
2313 #endif
2314
2315 static void tcp_chr_connect(void *opaque)
2316 {
2317 CharDriverState *chr = opaque;
2318 TCPCharDriver *s = chr->opaque;
2319
2320 s->connected = 1;
2321 qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2322 tcp_chr_read, NULL, chr);
2323 qemu_chr_generic_open(chr);
2324 }
2325
2326 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2327 static void tcp_chr_telnet_init(int fd)
2328 {
2329 char buf[3];
2330 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2331 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2332 send(fd, (char *)buf, 3, 0);
2333 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2334 send(fd, (char *)buf, 3, 0);
2335 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2336 send(fd, (char *)buf, 3, 0);
2337 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2338 send(fd, (char *)buf, 3, 0);
2339 }
2340
2341 static void socket_set_nodelay(int fd)
2342 {
2343 int val = 1;
2344 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2345 }
2346
2347 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2348 {
2349 TCPCharDriver *s = chr->opaque;
2350 if (s->fd != -1)
2351 return -1;
2352
2353 socket_set_nonblock(fd);
2354 if (s->do_nodelay)
2355 socket_set_nodelay(fd);
2356 s->fd = fd;
2357 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2358 tcp_chr_connect(chr);
2359
2360 return 0;
2361 }
2362
2363 static void tcp_chr_accept(void *opaque)
2364 {
2365 CharDriverState *chr = opaque;
2366 TCPCharDriver *s = chr->opaque;
2367 struct sockaddr_in saddr;
2368 #ifndef _WIN32
2369 struct sockaddr_un uaddr;
2370 #endif
2371 struct sockaddr *addr;
2372 socklen_t len;
2373 int fd;
2374
2375 for(;;) {
2376 #ifndef _WIN32
2377 if (s->is_unix) {
2378 len = sizeof(uaddr);
2379 addr = (struct sockaddr *)&uaddr;
2380 } else
2381 #endif
2382 {
2383 len = sizeof(saddr);
2384 addr = (struct sockaddr *)&saddr;
2385 }
2386 fd = qemu_accept(s->listen_fd, addr, &len);
2387 if (fd < 0 && errno != EINTR) {
2388 return;
2389 } else if (fd >= 0) {
2390 if (s->do_telnetopt)
2391 tcp_chr_telnet_init(fd);
2392 break;
2393 }
2394 }
2395 if (tcp_chr_add_client(chr, fd) < 0)
2396 close(fd);
2397 }
2398
2399 static void tcp_chr_close(CharDriverState *chr)
2400 {
2401 TCPCharDriver *s = chr->opaque;
2402 if (s->fd >= 0) {
2403 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2404 closesocket(s->fd);
2405 }
2406 if (s->listen_fd >= 0) {
2407 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2408 closesocket(s->listen_fd);
2409 }
2410 g_free(s);
2411 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2412 }
2413
2414 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2415 {
2416 CharDriverState *chr = NULL;
2417 TCPCharDriver *s = NULL;
2418 int fd = -1;
2419 int is_listen;
2420 int is_waitconnect;
2421 int do_nodelay;
2422 int is_unix;
2423 int is_telnet;
2424
2425 is_listen = qemu_opt_get_bool(opts, "server", 0);
2426 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2427 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2428 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2429 is_unix = qemu_opt_get(opts, "path") != NULL;
2430 if (!is_listen)
2431 is_waitconnect = 0;
2432
2433 chr = g_malloc0(sizeof(CharDriverState));
2434 s = g_malloc0(sizeof(TCPCharDriver));
2435
2436 if (is_unix) {
2437 if (is_listen) {
2438 fd = unix_listen_opts(opts);
2439 } else {
2440 fd = unix_connect_opts(opts);
2441 }
2442 } else {
2443 if (is_listen) {
2444 fd = inet_listen_opts(opts, 0);
2445 } else {
2446 fd = inet_connect_opts(opts);
2447 }
2448 }
2449 if (fd < 0) {
2450 goto fail;
2451 }
2452
2453 if (!is_waitconnect)
2454 socket_set_nonblock(fd);
2455
2456 s->connected = 0;
2457 s->fd = -1;
2458 s->listen_fd = -1;
2459 s->msgfd = -1;
2460 s->is_unix = is_unix;
2461 s->do_nodelay = do_nodelay && !is_unix;
2462
2463 chr->opaque = s;
2464 chr->chr_write = tcp_chr_write;
2465 chr->chr_close = tcp_chr_close;
2466 chr->get_msgfd = tcp_get_msgfd;
2467 chr->chr_add_client = tcp_chr_add_client;
2468
2469 if (is_listen) {
2470 s->listen_fd = fd;
2471 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2472 if (is_telnet)
2473 s->do_telnetopt = 1;
2474
2475 } else {
2476 s->connected = 1;
2477 s->fd = fd;
2478 socket_set_nodelay(fd);
2479 tcp_chr_connect(chr);
2480 }
2481
2482 /* for "info chardev" monitor command */
2483 chr->filename = g_malloc(256);
2484 if (is_unix) {
2485 snprintf(chr->filename, 256, "unix:%s%s",
2486 qemu_opt_get(opts, "path"),
2487 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2488 } else if (is_telnet) {
2489 snprintf(chr->filename, 256, "telnet:%s:%s%s",
2490 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2491 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2492 } else {
2493 snprintf(chr->filename, 256, "tcp:%s:%s%s",
2494 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2495 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2496 }
2497
2498 if (is_listen && is_waitconnect) {
2499 printf("QEMU waiting for connection on: %s\n",
2500 chr->filename);
2501 tcp_chr_accept(chr);
2502 socket_set_nonblock(s->listen_fd);
2503 }
2504 return chr;
2505
2506 fail:
2507 if (fd >= 0)
2508 closesocket(fd);
2509 g_free(s);
2510 g_free(chr);
2511 return NULL;
2512 }
2513
2514 /***********************************************************/
2515 /* Memory chardev */
2516 typedef struct {
2517 size_t outbuf_size;
2518 size_t outbuf_capacity;
2519 uint8_t *outbuf;
2520 } MemoryDriver;
2521
2522 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2523 {
2524 MemoryDriver *d = chr->opaque;
2525
2526 /* TODO: the QString implementation has the same code, we should
2527 * introduce a generic way to do this in cutils.c */
2528 if (d->outbuf_capacity < d->outbuf_size + len) {
2529 /* grow outbuf */
2530 d->outbuf_capacity += len;
2531 d->outbuf_capacity *= 2;
2532 d->outbuf = g_realloc(d->outbuf, d->outbuf_capacity);
2533 }
2534
2535 memcpy(d->outbuf + d->outbuf_size, buf, len);
2536 d->outbuf_size += len;
2537
2538 return len;
2539 }
2540
2541 void qemu_chr_init_mem(CharDriverState *chr)
2542 {
2543 MemoryDriver *d;
2544
2545 d = g_malloc(sizeof(*d));
2546 d->outbuf_size = 0;
2547 d->outbuf_capacity = 4096;
2548 d->outbuf = g_malloc0(d->outbuf_capacity);
2549
2550 memset(chr, 0, sizeof(*chr));
2551 chr->opaque = d;
2552 chr->chr_write = mem_chr_write;
2553 }
2554
2555 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2556 {
2557 MemoryDriver *d = chr->opaque;
2558 return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2559 }
2560
2561 /* NOTE: this driver can not be closed with qemu_chr_delete()! */
2562 void qemu_chr_close_mem(CharDriverState *chr)
2563 {
2564 MemoryDriver *d = chr->opaque;
2565
2566 g_free(d->outbuf);
2567 g_free(chr->opaque);
2568 chr->opaque = NULL;
2569 chr->chr_write = NULL;
2570 }
2571
2572 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2573 {
2574 const MemoryDriver *d = chr->opaque;
2575 return d->outbuf_size;
2576 }
2577
2578 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2579 {
2580 char host[65], port[33], width[8], height[8];
2581 int pos;
2582 const char *p;
2583 QemuOpts *opts;
2584
2585 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
2586 if (NULL == opts)
2587 return NULL;
2588
2589 if (strstart(filename, "mon:", &p)) {
2590 filename = p;
2591 qemu_opt_set(opts, "mux", "on");
2592 }
2593
2594 if (strcmp(filename, "null") == 0 ||
2595 strcmp(filename, "pty") == 0 ||
2596 strcmp(filename, "msmouse") == 0 ||
2597 strcmp(filename, "braille") == 0 ||
2598 strcmp(filename, "stdio") == 0) {
2599 qemu_opt_set(opts, "backend", filename);
2600 return opts;
2601 }
2602 if (strstart(filename, "vc", &p)) {
2603 qemu_opt_set(opts, "backend", "vc");
2604 if (*p == ':') {
2605 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2606 /* pixels */
2607 qemu_opt_set(opts, "width", width);
2608 qemu_opt_set(opts, "height", height);
2609 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2610 /* chars */
2611 qemu_opt_set(opts, "cols", width);
2612 qemu_opt_set(opts, "rows", height);
2613 } else {
2614 goto fail;
2615 }
2616 }
2617 return opts;
2618 }
2619 if (strcmp(filename, "con:") == 0) {
2620 qemu_opt_set(opts, "backend", "console");
2621 return opts;
2622 }
2623 if (strstart(filename, "COM", NULL)) {
2624 qemu_opt_set(opts, "backend", "serial");
2625 qemu_opt_set(opts, "path", filename);
2626 return opts;
2627 }
2628 if (strstart(filename, "file:", &p)) {
2629 qemu_opt_set(opts, "backend", "file");
2630 qemu_opt_set(opts, "path", p);
2631 return opts;
2632 }
2633 if (strstart(filename, "pipe:", &p)) {
2634 qemu_opt_set(opts, "backend", "pipe");
2635 qemu_opt_set(opts, "path", p);
2636 return opts;
2637 }
2638 if (strstart(filename, "tcp:", &p) ||
2639 strstart(filename, "telnet:", &p)) {
2640 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2641 host[0] = 0;
2642 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2643 goto fail;
2644 }
2645 qemu_opt_set(opts, "backend", "socket");
2646 qemu_opt_set(opts, "host", host);
2647 qemu_opt_set(opts, "port", port);
2648 if (p[pos] == ',') {
2649 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2650 goto fail;
2651 }
2652 if (strstart(filename, "telnet:", &p))
2653 qemu_opt_set(opts, "telnet", "on");
2654 return opts;
2655 }
2656 if (strstart(filename, "udp:", &p)) {
2657 qemu_opt_set(opts, "backend", "udp");
2658 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2659 host[0] = 0;
2660 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2661 goto fail;
2662 }
2663 }
2664 qemu_opt_set(opts, "host", host);
2665 qemu_opt_set(opts, "port", port);
2666 if (p[pos] == '@') {
2667 p += pos + 1;
2668 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2669 host[0] = 0;
2670 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2671 goto fail;
2672 }
2673 }
2674 qemu_opt_set(opts, "localaddr", host);
2675 qemu_opt_set(opts, "localport", port);
2676 }
2677 return opts;
2678 }
2679 if (strstart(filename, "unix:", &p)) {
2680 qemu_opt_set(opts, "backend", "socket");
2681 if (qemu_opts_do_parse(opts, p, "path") != 0)
2682 goto fail;
2683 return opts;
2684 }
2685 if (strstart(filename, "/dev/parport", NULL) ||
2686 strstart(filename, "/dev/ppi", NULL)) {
2687 qemu_opt_set(opts, "backend", "parport");
2688 qemu_opt_set(opts, "path", filename);
2689 return opts;
2690 }
2691 if (strstart(filename, "/dev/", NULL)) {
2692 qemu_opt_set(opts, "backend", "tty");
2693 qemu_opt_set(opts, "path", filename);
2694 return opts;
2695 }
2696
2697 fail:
2698 qemu_opts_del(opts);
2699 return NULL;
2700 }
2701
2702 static const struct {
2703 const char *name;
2704 CharDriverState *(*open)(QemuOpts *opts);
2705 } backend_table[] = {
2706 { .name = "null", .open = qemu_chr_open_null },
2707 { .name = "socket", .open = qemu_chr_open_socket },
2708 { .name = "udp", .open = qemu_chr_open_udp },
2709 { .name = "msmouse", .open = qemu_chr_open_msmouse },
2710 { .name = "vc", .open = text_console_init },
2711 #ifdef _WIN32
2712 { .name = "file", .open = qemu_chr_open_win_file_out },
2713 { .name = "pipe", .open = qemu_chr_open_win_pipe },
2714 { .name = "console", .open = qemu_chr_open_win_con },
2715 { .name = "serial", .open = qemu_chr_open_win },
2716 { .name = "stdio", .open = qemu_chr_open_win_stdio },
2717 #else
2718 { .name = "file", .open = qemu_chr_open_file_out },
2719 { .name = "pipe", .open = qemu_chr_open_pipe },
2720 { .name = "pty", .open = qemu_chr_open_pty },
2721 { .name = "stdio", .open = qemu_chr_open_stdio },
2722 #endif
2723 #ifdef CONFIG_BRLAPI
2724 { .name = "braille", .open = chr_baum_init },
2725 #endif
2726 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2727 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
2728 || defined(__FreeBSD_kernel__)
2729 { .name = "tty", .open = qemu_chr_open_tty },
2730 #endif
2731 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
2732 || defined(__FreeBSD_kernel__)
2733 { .name = "parport", .open = qemu_chr_open_pp },
2734 #endif
2735 #ifdef CONFIG_SPICE
2736 { .name = "spicevmc", .open = qemu_chr_open_spice },
2737 #endif
2738 };
2739
2740 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
2741 void (*init)(struct CharDriverState *s))
2742 {
2743 CharDriverState *chr;
2744 int i;
2745
2746 if (qemu_opts_id(opts) == NULL) {
2747 fprintf(stderr, "chardev: no id specified\n");
2748 return NULL;
2749 }
2750
2751 if (qemu_opt_get(opts, "backend") == NULL) {
2752 fprintf(stderr, "chardev: \"%s\" missing backend\n",
2753 qemu_opts_id(opts));
2754 return NULL;
2755 }
2756 for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2757 if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2758 break;
2759 }
2760 if (i == ARRAY_SIZE(backend_table)) {
2761 fprintf(stderr, "chardev: backend \"%s\" not found\n",
2762 qemu_opt_get(opts, "backend"));
2763 return NULL;
2764 }
2765
2766 chr = backend_table[i].open(opts);
2767 if (!chr) {
2768 fprintf(stderr, "chardev: opening backend \"%s\" failed\n",
2769 qemu_opt_get(opts, "backend"));
2770 return NULL;
2771 }
2772
2773 if (!chr->filename)
2774 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
2775 chr->init = init;
2776 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2777
2778 if (qemu_opt_get_bool(opts, "mux", 0)) {
2779 CharDriverState *base = chr;
2780 int len = strlen(qemu_opts_id(opts)) + 6;
2781 base->label = g_malloc(len);
2782 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
2783 chr = qemu_chr_open_mux(base);
2784 chr->filename = base->filename;
2785 chr->avail_connections = MAX_MUX;
2786 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2787 } else {
2788 chr->avail_connections = 1;
2789 }
2790 chr->label = g_strdup(qemu_opts_id(opts));
2791 return chr;
2792 }
2793
2794 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2795 {
2796 const char *p;
2797 CharDriverState *chr;
2798 QemuOpts *opts;
2799
2800 if (strstart(filename, "chardev:", &p)) {
2801 return qemu_chr_find(p);
2802 }
2803
2804 opts = qemu_chr_parse_compat(label, filename);
2805 if (!opts)
2806 return NULL;
2807
2808 chr = qemu_chr_new_from_opts(opts, init);
2809 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
2810 monitor_init(chr, MONITOR_USE_READLINE);
2811 }
2812 qemu_opts_del(opts);
2813 return chr;
2814 }
2815
2816 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
2817 {
2818 if (chr->chr_set_echo) {
2819 chr->chr_set_echo(chr, echo);
2820 }
2821 }
2822
2823 void qemu_chr_fe_open(struct CharDriverState *chr)
2824 {
2825 if (chr->chr_guest_open) {
2826 chr->chr_guest_open(chr);
2827 }
2828 }
2829
2830 void qemu_chr_fe_close(struct CharDriverState *chr)
2831 {
2832 if (chr->chr_guest_close) {
2833 chr->chr_guest_close(chr);
2834 }
2835 }
2836
2837 void qemu_chr_delete(CharDriverState *chr)
2838 {
2839 QTAILQ_REMOVE(&chardevs, chr, next);
2840 if (chr->chr_close)
2841 chr->chr_close(chr);
2842 g_free(chr->filename);
2843 g_free(chr->label);
2844 g_free(chr);
2845 }
2846
2847 ChardevInfoList *qmp_query_chardev(Error **errp)
2848 {
2849 ChardevInfoList *chr_list = NULL;
2850 CharDriverState *chr;
2851
2852 QTAILQ_FOREACH(chr, &chardevs, next) {
2853 ChardevInfoList *info = g_malloc0(sizeof(*info));
2854 info->value = g_malloc0(sizeof(*info->value));
2855 info->value->label = g_strdup(chr->label);
2856 info->value->filename = g_strdup(chr->filename);
2857
2858 info->next = chr_list;
2859 chr_list = info;
2860 }
2861
2862 return chr_list;
2863 }
2864
2865 CharDriverState *qemu_chr_find(const char *name)
2866 {
2867 CharDriverState *chr;
2868
2869 QTAILQ_FOREACH(chr, &chardevs, next) {
2870 if (strcmp(chr->label, name) != 0)
2871 continue;
2872 return chr;
2873 }
2874 return NULL;
2875 }
2876
2877 /* Get a character (serial) device interface. */
2878 CharDriverState *qemu_char_get_next_serial(void)
2879 {
2880 static int next_serial;
2881
2882 /* FIXME: This function needs to go away: use chardev properties! */
2883 return serial_hds[next_serial++];
2884 }
2885
QEMU modified to work with kvm