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Fix guest OS hang when 64bit PCI bar present
[qemu.git] / qemu-char.c
blob160decc2f07311d8b37c107266468765c92490c7
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_fd(int fd)
1234 {
1235 CharDriverState *chr;
1236
1237 tty_serial_init(fd, 115200, 'N', 8, 1);
1238 chr = qemu_chr_open_fd(fd, fd);
1239 chr->chr_ioctl = tty_serial_ioctl;
1240 chr->chr_close = qemu_chr_close_tty;
1241 return chr;
1242 }
1243
1244 static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
1245 {
1246 const char *filename = qemu_opt_get(opts, "path");
1247 int fd;
1248
1249 TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK));
1250 if (fd < 0) {
1251 return NULL;
1252 }
1253 return qemu_chr_open_tty_fd(fd);
1254 }
1255 #endif /* __linux__ || __sun__ */
1256
1257 #if defined(__linux__)
1258
1259 #define HAVE_CHARDEV_PARPORT 1
1260
1261 typedef struct {
1262 int fd;
1263 int mode;
1264 } ParallelCharDriver;
1265
1266 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1267 {
1268 if (s->mode != mode) {
1269 int m = mode;
1270 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1271 return 0;
1272 s->mode = mode;
1273 }
1274 return 1;
1275 }
1276
1277 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1278 {
1279 ParallelCharDriver *drv = chr->opaque;
1280 int fd = drv->fd;
1281 uint8_t b;
1282
1283 switch(cmd) {
1284 case CHR_IOCTL_PP_READ_DATA:
1285 if (ioctl(fd, PPRDATA, &b) < 0)
1286 return -ENOTSUP;
1287 *(uint8_t *)arg = b;
1288 break;
1289 case CHR_IOCTL_PP_WRITE_DATA:
1290 b = *(uint8_t *)arg;
1291 if (ioctl(fd, PPWDATA, &b) < 0)
1292 return -ENOTSUP;
1293 break;
1294 case CHR_IOCTL_PP_READ_CONTROL:
1295 if (ioctl(fd, PPRCONTROL, &b) < 0)
1296 return -ENOTSUP;
1297 /* Linux gives only the lowest bits, and no way to know data
1298 direction! For better compatibility set the fixed upper
1299 bits. */
1300 *(uint8_t *)arg = b | 0xc0;
1301 break;
1302 case CHR_IOCTL_PP_WRITE_CONTROL:
1303 b = *(uint8_t *)arg;
1304 if (ioctl(fd, PPWCONTROL, &b) < 0)
1305 return -ENOTSUP;
1306 break;
1307 case CHR_IOCTL_PP_READ_STATUS:
1308 if (ioctl(fd, PPRSTATUS, &b) < 0)
1309 return -ENOTSUP;
1310 *(uint8_t *)arg = b;
1311 break;
1312 case CHR_IOCTL_PP_DATA_DIR:
1313 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1314 return -ENOTSUP;
1315 break;
1316 case CHR_IOCTL_PP_EPP_READ_ADDR:
1317 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1318 struct ParallelIOArg *parg = arg;
1319 int n = read(fd, parg->buffer, parg->count);
1320 if (n != parg->count) {
1321 return -EIO;
1322 }
1323 }
1324 break;
1325 case CHR_IOCTL_PP_EPP_READ:
1326 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1327 struct ParallelIOArg *parg = arg;
1328 int n = read(fd, parg->buffer, parg->count);
1329 if (n != parg->count) {
1330 return -EIO;
1331 }
1332 }
1333 break;
1334 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1335 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1336 struct ParallelIOArg *parg = arg;
1337 int n = write(fd, parg->buffer, parg->count);
1338 if (n != parg->count) {
1339 return -EIO;
1340 }
1341 }
1342 break;
1343 case CHR_IOCTL_PP_EPP_WRITE:
1344 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1345 struct ParallelIOArg *parg = arg;
1346 int n = write(fd, parg->buffer, parg->count);
1347 if (n != parg->count) {
1348 return -EIO;
1349 }
1350 }
1351 break;
1352 default:
1353 return -ENOTSUP;
1354 }
1355 return 0;
1356 }
1357
1358 static void pp_close(CharDriverState *chr)
1359 {
1360 ParallelCharDriver *drv = chr->opaque;
1361 int fd = drv->fd;
1362
1363 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1364 ioctl(fd, PPRELEASE);
1365 close(fd);
1366 g_free(drv);
1367 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1368 }
1369
1370 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1371 {
1372 CharDriverState *chr;
1373 ParallelCharDriver *drv;
1374
1375 if (ioctl(fd, PPCLAIM) < 0) {
1376 close(fd);
1377 return NULL;
1378 }
1379
1380 drv = g_malloc0(sizeof(ParallelCharDriver));
1381 drv->fd = fd;
1382 drv->mode = IEEE1284_MODE_COMPAT;
1383
1384 chr = g_malloc0(sizeof(CharDriverState));
1385 chr->chr_write = null_chr_write;
1386 chr->chr_ioctl = pp_ioctl;
1387 chr->chr_close = pp_close;
1388 chr->opaque = drv;
1389
1390 qemu_chr_generic_open(chr);
1391
1392 return chr;
1393 }
1394 #endif /* __linux__ */
1395
1396 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1397
1398 #define HAVE_CHARDEV_PARPORT 1
1399
1400 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1401 {
1402 int fd = (int)(intptr_t)chr->opaque;
1403 uint8_t b;
1404
1405 switch(cmd) {
1406 case CHR_IOCTL_PP_READ_DATA:
1407 if (ioctl(fd, PPIGDATA, &b) < 0)
1408 return -ENOTSUP;
1409 *(uint8_t *)arg = b;
1410 break;
1411 case CHR_IOCTL_PP_WRITE_DATA:
1412 b = *(uint8_t *)arg;
1413 if (ioctl(fd, PPISDATA, &b) < 0)
1414 return -ENOTSUP;
1415 break;
1416 case CHR_IOCTL_PP_READ_CONTROL:
1417 if (ioctl(fd, PPIGCTRL, &b) < 0)
1418 return -ENOTSUP;
1419 *(uint8_t *)arg = b;
1420 break;
1421 case CHR_IOCTL_PP_WRITE_CONTROL:
1422 b = *(uint8_t *)arg;
1423 if (ioctl(fd, PPISCTRL, &b) < 0)
1424 return -ENOTSUP;
1425 break;
1426 case CHR_IOCTL_PP_READ_STATUS:
1427 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1428 return -ENOTSUP;
1429 *(uint8_t *)arg = b;
1430 break;
1431 default:
1432 return -ENOTSUP;
1433 }
1434 return 0;
1435 }
1436
1437 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1438 {
1439 CharDriverState *chr;
1440
1441 chr = g_malloc0(sizeof(CharDriverState));
1442 chr->opaque = (void *)(intptr_t)fd;
1443 chr->chr_write = null_chr_write;
1444 chr->chr_ioctl = pp_ioctl;
1445 return chr;
1446 }
1447 #endif
1448
1449 #else /* _WIN32 */
1450
1451 static CharDriverState *stdio_clients[STDIO_MAX_CLIENTS];
1452
1453 typedef struct {
1454 int max_size;
1455 HANDLE hcom, hrecv, hsend;
1456 OVERLAPPED orecv, osend;
1457 BOOL fpipe;
1458 DWORD len;
1459 } WinCharState;
1460
1461 typedef struct {
1462 HANDLE hStdIn;
1463 HANDLE hInputReadyEvent;
1464 HANDLE hInputDoneEvent;
1465 HANDLE hInputThread;
1466 uint8_t win_stdio_buf;
1467 } WinStdioCharState;
1468
1469 #define NSENDBUF 2048
1470 #define NRECVBUF 2048
1471 #define MAXCONNECT 1
1472 #define NTIMEOUT 5000
1473
1474 static int win_chr_poll(void *opaque);
1475 static int win_chr_pipe_poll(void *opaque);
1476
1477 static void win_chr_close(CharDriverState *chr)
1478 {
1479 WinCharState *s = chr->opaque;
1480
1481 if (s->hsend) {
1482 CloseHandle(s->hsend);
1483 s->hsend = NULL;
1484 }
1485 if (s->hrecv) {
1486 CloseHandle(s->hrecv);
1487 s->hrecv = NULL;
1488 }
1489 if (s->hcom) {
1490 CloseHandle(s->hcom);
1491 s->hcom = NULL;
1492 }
1493 if (s->fpipe)
1494 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1495 else
1496 qemu_del_polling_cb(win_chr_poll, chr);
1497
1498 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1499 }
1500
1501 static int win_chr_init(CharDriverState *chr, const char *filename)
1502 {
1503 WinCharState *s = chr->opaque;
1504 COMMCONFIG comcfg;
1505 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1506 COMSTAT comstat;
1507 DWORD size;
1508 DWORD err;
1509
1510 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1511 if (!s->hsend) {
1512 fprintf(stderr, "Failed CreateEvent\n");
1513 goto fail;
1514 }
1515 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1516 if (!s->hrecv) {
1517 fprintf(stderr, "Failed CreateEvent\n");
1518 goto fail;
1519 }
1520
1521 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1522 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1523 if (s->hcom == INVALID_HANDLE_VALUE) {
1524 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1525 s->hcom = NULL;
1526 goto fail;
1527 }
1528
1529 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1530 fprintf(stderr, "Failed SetupComm\n");
1531 goto fail;
1532 }
1533
1534 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1535 size = sizeof(COMMCONFIG);
1536 GetDefaultCommConfig(filename, &comcfg, &size);
1537 comcfg.dcb.DCBlength = sizeof(DCB);
1538 CommConfigDialog(filename, NULL, &comcfg);
1539
1540 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1541 fprintf(stderr, "Failed SetCommState\n");
1542 goto fail;
1543 }
1544
1545 if (!SetCommMask(s->hcom, EV_ERR)) {
1546 fprintf(stderr, "Failed SetCommMask\n");
1547 goto fail;
1548 }
1549
1550 cto.ReadIntervalTimeout = MAXDWORD;
1551 if (!SetCommTimeouts(s->hcom, &cto)) {
1552 fprintf(stderr, "Failed SetCommTimeouts\n");
1553 goto fail;
1554 }
1555
1556 if (!ClearCommError(s->hcom, &err, &comstat)) {
1557 fprintf(stderr, "Failed ClearCommError\n");
1558 goto fail;
1559 }
1560 qemu_add_polling_cb(win_chr_poll, chr);
1561 return 0;
1562
1563 fail:
1564 win_chr_close(chr);
1565 return -1;
1566 }
1567
1568 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1569 {
1570 WinCharState *s = chr->opaque;
1571 DWORD len, ret, size, err;
1572
1573 len = len1;
1574 ZeroMemory(&s->osend, sizeof(s->osend));
1575 s->osend.hEvent = s->hsend;
1576 while (len > 0) {
1577 if (s->hsend)
1578 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1579 else
1580 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1581 if (!ret) {
1582 err = GetLastError();
1583 if (err == ERROR_IO_PENDING) {
1584 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1585 if (ret) {
1586 buf += size;
1587 len -= size;
1588 } else {
1589 break;
1590 }
1591 } else {
1592 break;
1593 }
1594 } else {
1595 buf += size;
1596 len -= size;
1597 }
1598 }
1599 return len1 - len;
1600 }
1601
1602 static int win_chr_read_poll(CharDriverState *chr)
1603 {
1604 WinCharState *s = chr->opaque;
1605
1606 s->max_size = qemu_chr_be_can_write(chr);
1607 return s->max_size;
1608 }
1609
1610 static void win_chr_readfile(CharDriverState *chr)
1611 {
1612 WinCharState *s = chr->opaque;
1613 int ret, err;
1614 uint8_t buf[READ_BUF_LEN];
1615 DWORD size;
1616
1617 ZeroMemory(&s->orecv, sizeof(s->orecv));
1618 s->orecv.hEvent = s->hrecv;
1619 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1620 if (!ret) {
1621 err = GetLastError();
1622 if (err == ERROR_IO_PENDING) {
1623 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1624 }
1625 }
1626
1627 if (size > 0) {
1628 qemu_chr_be_write(chr, buf, size);
1629 }
1630 }
1631
1632 static void win_chr_read(CharDriverState *chr)
1633 {
1634 WinCharState *s = chr->opaque;
1635
1636 if (s->len > s->max_size)
1637 s->len = s->max_size;
1638 if (s->len == 0)
1639 return;
1640
1641 win_chr_readfile(chr);
1642 }
1643
1644 static int win_chr_poll(void *opaque)
1645 {
1646 CharDriverState *chr = opaque;
1647 WinCharState *s = chr->opaque;
1648 COMSTAT status;
1649 DWORD comerr;
1650
1651 ClearCommError(s->hcom, &comerr, &status);
1652 if (status.cbInQue > 0) {
1653 s->len = status.cbInQue;
1654 win_chr_read_poll(chr);
1655 win_chr_read(chr);
1656 return 1;
1657 }
1658 return 0;
1659 }
1660
1661 static CharDriverState *qemu_chr_open_win_path(const char *filename)
1662 {
1663 CharDriverState *chr;
1664 WinCharState *s;
1665
1666 chr = g_malloc0(sizeof(CharDriverState));
1667 s = g_malloc0(sizeof(WinCharState));
1668 chr->opaque = s;
1669 chr->chr_write = win_chr_write;
1670 chr->chr_close = win_chr_close;
1671
1672 if (win_chr_init(chr, filename) < 0) {
1673 g_free(s);
1674 g_free(chr);
1675 return NULL;
1676 }
1677 qemu_chr_generic_open(chr);
1678 return chr;
1679 }
1680
1681 static CharDriverState *qemu_chr_open_win(QemuOpts *opts)
1682 {
1683 return qemu_chr_open_win_path(qemu_opt_get(opts, "path"));
1684 }
1685
1686 static int win_chr_pipe_poll(void *opaque)
1687 {
1688 CharDriverState *chr = opaque;
1689 WinCharState *s = chr->opaque;
1690 DWORD size;
1691
1692 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1693 if (size > 0) {
1694 s->len = size;
1695 win_chr_read_poll(chr);
1696 win_chr_read(chr);
1697 return 1;
1698 }
1699 return 0;
1700 }
1701
1702 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1703 {
1704 WinCharState *s = chr->opaque;
1705 OVERLAPPED ov;
1706 int ret;
1707 DWORD size;
1708 char openname[256];
1709
1710 s->fpipe = TRUE;
1711
1712 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1713 if (!s->hsend) {
1714 fprintf(stderr, "Failed CreateEvent\n");
1715 goto fail;
1716 }
1717 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1718 if (!s->hrecv) {
1719 fprintf(stderr, "Failed CreateEvent\n");
1720 goto fail;
1721 }
1722
1723 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1724 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1725 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1726 PIPE_WAIT,
1727 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1728 if (s->hcom == INVALID_HANDLE_VALUE) {
1729 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1730 s->hcom = NULL;
1731 goto fail;
1732 }
1733
1734 ZeroMemory(&ov, sizeof(ov));
1735 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1736 ret = ConnectNamedPipe(s->hcom, &ov);
1737 if (ret) {
1738 fprintf(stderr, "Failed ConnectNamedPipe\n");
1739 goto fail;
1740 }
1741
1742 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1743 if (!ret) {
1744 fprintf(stderr, "Failed GetOverlappedResult\n");
1745 if (ov.hEvent) {
1746 CloseHandle(ov.hEvent);
1747 ov.hEvent = NULL;
1748 }
1749 goto fail;
1750 }
1751
1752 if (ov.hEvent) {
1753 CloseHandle(ov.hEvent);
1754 ov.hEvent = NULL;
1755 }
1756 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1757 return 0;
1758
1759 fail:
1760 win_chr_close(chr);
1761 return -1;
1762 }
1763
1764
1765 static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts)
1766 {
1767 const char *filename = qemu_opt_get(opts, "path");
1768 CharDriverState *chr;
1769 WinCharState *s;
1770
1771 chr = g_malloc0(sizeof(CharDriverState));
1772 s = g_malloc0(sizeof(WinCharState));
1773 chr->opaque = s;
1774 chr->chr_write = win_chr_write;
1775 chr->chr_close = win_chr_close;
1776
1777 if (win_chr_pipe_init(chr, filename) < 0) {
1778 g_free(s);
1779 g_free(chr);
1780 return NULL;
1781 }
1782 qemu_chr_generic_open(chr);
1783 return chr;
1784 }
1785
1786 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1787 {
1788 CharDriverState *chr;
1789 WinCharState *s;
1790
1791 chr = g_malloc0(sizeof(CharDriverState));
1792 s = g_malloc0(sizeof(WinCharState));
1793 s->hcom = fd_out;
1794 chr->opaque = s;
1795 chr->chr_write = win_chr_write;
1796 qemu_chr_generic_open(chr);
1797 return chr;
1798 }
1799
1800 static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts)
1801 {
1802 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1803 }
1804
1805 static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts)
1806 {
1807 const char *file_out = qemu_opt_get(opts, "path");
1808 HANDLE fd_out;
1809
1810 fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1811 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1812 if (fd_out == INVALID_HANDLE_VALUE) {
1813 return NULL;
1814 }
1815
1816 return qemu_chr_open_win_file(fd_out);
1817 }
1818
1819 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1820 {
1821 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1822 DWORD dwSize;
1823 int len1;
1824
1825 len1 = len;
1826
1827 while (len1 > 0) {
1828 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1829 break;
1830 }
1831 buf += dwSize;
1832 len1 -= dwSize;
1833 }
1834
1835 return len - len1;
1836 }
1837
1838 static void win_stdio_wait_func(void *opaque)
1839 {
1840 CharDriverState *chr = opaque;
1841 WinStdioCharState *stdio = chr->opaque;
1842 INPUT_RECORD buf[4];
1843 int ret;
1844 DWORD dwSize;
1845 int i;
1846
1847 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
1848 &dwSize);
1849
1850 if (!ret) {
1851 /* Avoid error storm */
1852 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
1853 return;
1854 }
1855
1856 for (i = 0; i < dwSize; i++) {
1857 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
1858
1859 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
1860 int j;
1861 if (kev->uChar.AsciiChar != 0) {
1862 for (j = 0; j < kev->wRepeatCount; j++) {
1863 if (qemu_chr_be_can_write(chr)) {
1864 uint8_t c = kev->uChar.AsciiChar;
1865 qemu_chr_be_write(chr, &c, 1);
1866 }
1867 }
1868 }
1869 }
1870 }
1871 }
1872
1873 static DWORD WINAPI win_stdio_thread(LPVOID param)
1874 {
1875 CharDriverState *chr = param;
1876 WinStdioCharState *stdio = chr->opaque;
1877 int ret;
1878 DWORD dwSize;
1879
1880 while (1) {
1881
1882 /* Wait for one byte */
1883 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
1884
1885 /* Exit in case of error, continue if nothing read */
1886 if (!ret) {
1887 break;
1888 }
1889 if (!dwSize) {
1890 continue;
1891 }
1892
1893 /* Some terminal emulator returns \r\n for Enter, just pass \n */
1894 if (stdio->win_stdio_buf == '\r') {
1895 continue;
1896 }
1897
1898 /* Signal the main thread and wait until the byte was eaten */
1899 if (!SetEvent(stdio->hInputReadyEvent)) {
1900 break;
1901 }
1902 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
1903 != WAIT_OBJECT_0) {
1904 break;
1905 }
1906 }
1907
1908 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
1909 return 0;
1910 }
1911
1912 static void win_stdio_thread_wait_func(void *opaque)
1913 {
1914 CharDriverState *chr = opaque;
1915 WinStdioCharState *stdio = chr->opaque;
1916
1917 if (qemu_chr_be_can_write(chr)) {
1918 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
1919 }
1920
1921 SetEvent(stdio->hInputDoneEvent);
1922 }
1923
1924 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
1925 {
1926 WinStdioCharState *stdio = chr->opaque;
1927 DWORD dwMode = 0;
1928
1929 GetConsoleMode(stdio->hStdIn, &dwMode);
1930
1931 if (echo) {
1932 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
1933 } else {
1934 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
1935 }
1936 }
1937
1938 static void win_stdio_close(CharDriverState *chr)
1939 {
1940 WinStdioCharState *stdio = chr->opaque;
1941
1942 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
1943 CloseHandle(stdio->hInputReadyEvent);
1944 }
1945 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
1946 CloseHandle(stdio->hInputDoneEvent);
1947 }
1948 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
1949 TerminateThread(stdio->hInputThread, 0);
1950 }
1951
1952 g_free(chr->opaque);
1953 g_free(chr);
1954 stdio_nb_clients--;
1955 }
1956
1957 static CharDriverState *qemu_chr_open_win_stdio(QemuOpts *opts)
1958 {
1959 CharDriverState *chr;
1960 WinStdioCharState *stdio;
1961 DWORD dwMode;
1962 int is_console = 0;
1963
1964 if (stdio_nb_clients >= STDIO_MAX_CLIENTS
1965 || ((display_type != DT_NOGRAPHIC) && (stdio_nb_clients != 0))) {
1966 return NULL;
1967 }
1968
1969 chr = g_malloc0(sizeof(CharDriverState));
1970 stdio = g_malloc0(sizeof(WinStdioCharState));
1971
1972 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
1973 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
1974 fprintf(stderr, "cannot open stdio: invalid handle\n");
1975 exit(1);
1976 }
1977
1978 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
1979
1980 chr->opaque = stdio;
1981 chr->chr_write = win_stdio_write;
1982 chr->chr_close = win_stdio_close;
1983
1984 if (stdio_nb_clients == 0) {
1985 if (is_console) {
1986 if (qemu_add_wait_object(stdio->hStdIn,
1987 win_stdio_wait_func, chr)) {
1988 fprintf(stderr, "qemu_add_wait_object: failed\n");
1989 }
1990 } else {
1991 DWORD dwId;
1992
1993 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
1994 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
1995 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
1996 chr, 0, &dwId);
1997
1998 if (stdio->hInputThread == INVALID_HANDLE_VALUE
1999 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2000 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2001 fprintf(stderr, "cannot create stdio thread or event\n");
2002 exit(1);
2003 }
2004 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2005 win_stdio_thread_wait_func, chr)) {
2006 fprintf(stderr, "qemu_add_wait_object: failed\n");
2007 }
2008 }
2009 }
2010
2011 dwMode |= ENABLE_LINE_INPUT;
2012
2013 stdio_clients[stdio_nb_clients++] = chr;
2014 if (stdio_nb_clients == 1 && is_console) {
2015 /* set the terminal in raw mode */
2016 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2017 dwMode |= ENABLE_PROCESSED_INPUT;
2018 }
2019
2020 SetConsoleMode(stdio->hStdIn, dwMode);
2021
2022 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2023 qemu_chr_fe_set_echo(chr, false);
2024
2025 return chr;
2026 }
2027 #endif /* !_WIN32 */
2028
2029 /***********************************************************/
2030 /* UDP Net console */
2031
2032 typedef struct {
2033 int fd;
2034 uint8_t buf[READ_BUF_LEN];
2035 int bufcnt;
2036 int bufptr;
2037 int max_size;
2038 } NetCharDriver;
2039
2040 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2041 {
2042 NetCharDriver *s = chr->opaque;
2043
2044 return send(s->fd, (const void *)buf, len, 0);
2045 }
2046
2047 static int udp_chr_read_poll(void *opaque)
2048 {
2049 CharDriverState *chr = opaque;
2050 NetCharDriver *s = chr->opaque;
2051
2052 s->max_size = qemu_chr_be_can_write(chr);
2053
2054 /* If there were any stray characters in the queue process them
2055 * first
2056 */
2057 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2058 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2059 s->bufptr++;
2060 s->max_size = qemu_chr_be_can_write(chr);
2061 }
2062 return s->max_size;
2063 }
2064
2065 static void udp_chr_read(void *opaque)
2066 {
2067 CharDriverState *chr = opaque;
2068 NetCharDriver *s = chr->opaque;
2069
2070 if (s->max_size == 0)
2071 return;
2072 s->bufcnt = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0);
2073 s->bufptr = s->bufcnt;
2074 if (s->bufcnt <= 0)
2075 return;
2076
2077 s->bufptr = 0;
2078 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2079 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2080 s->bufptr++;
2081 s->max_size = qemu_chr_be_can_write(chr);
2082 }
2083 }
2084
2085 static void udp_chr_update_read_handler(CharDriverState *chr)
2086 {
2087 NetCharDriver *s = chr->opaque;
2088
2089 if (s->fd >= 0) {
2090 qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
2091 udp_chr_read, NULL, chr);
2092 }
2093 }
2094
2095 static void udp_chr_close(CharDriverState *chr)
2096 {
2097 NetCharDriver *s = chr->opaque;
2098 if (s->fd >= 0) {
2099 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2100 closesocket(s->fd);
2101 }
2102 g_free(s);
2103 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2104 }
2105
2106 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2107 {
2108 CharDriverState *chr = NULL;
2109 NetCharDriver *s = NULL;
2110 Error *local_err = NULL;
2111 int fd = -1;
2112
2113 chr = g_malloc0(sizeof(CharDriverState));
2114 s = g_malloc0(sizeof(NetCharDriver));
2115
2116 fd = inet_dgram_opts(opts, &local_err);
2117 if (fd < 0) {
2118 goto return_err;
2119 }
2120
2121 s->fd = fd;
2122 s->bufcnt = 0;
2123 s->bufptr = 0;
2124 chr->opaque = s;
2125 chr->chr_write = udp_chr_write;
2126 chr->chr_update_read_handler = udp_chr_update_read_handler;
2127 chr->chr_close = udp_chr_close;
2128 return chr;
2129
2130 return_err:
2131 if (local_err) {
2132 qerror_report_err(local_err);
2133 error_free(local_err);
2134 }
2135 g_free(chr);
2136 g_free(s);
2137 if (fd >= 0) {
2138 closesocket(fd);
2139 }
2140 return NULL;
2141 }
2142
2143 /***********************************************************/
2144 /* TCP Net console */
2145
2146 typedef struct {
2147 int fd, listen_fd;
2148 int connected;
2149 int max_size;
2150 int do_telnetopt;
2151 int do_nodelay;
2152 int is_unix;
2153 int msgfd;
2154 } TCPCharDriver;
2155
2156 static void tcp_chr_accept(void *opaque);
2157
2158 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2159 {
2160 TCPCharDriver *s = chr->opaque;
2161 if (s->connected) {
2162 return send_all(s->fd, buf, len);
2163 } else {
2164 /* XXX: indicate an error ? */
2165 return len;
2166 }
2167 }
2168
2169 static int tcp_chr_read_poll(void *opaque)
2170 {
2171 CharDriverState *chr = opaque;
2172 TCPCharDriver *s = chr->opaque;
2173 if (!s->connected)
2174 return 0;
2175 s->max_size = qemu_chr_be_can_write(chr);
2176 return s->max_size;
2177 }
2178
2179 #define IAC 255
2180 #define IAC_BREAK 243
2181 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2182 TCPCharDriver *s,
2183 uint8_t *buf, int *size)
2184 {
2185 /* Handle any telnet client's basic IAC options to satisfy char by
2186 * char mode with no echo. All IAC options will be removed from
2187 * the buf and the do_telnetopt variable will be used to track the
2188 * state of the width of the IAC information.
2189 *
2190 * IAC commands come in sets of 3 bytes with the exception of the
2191 * "IAC BREAK" command and the double IAC.
2192 */
2193
2194 int i;
2195 int j = 0;
2196
2197 for (i = 0; i < *size; i++) {
2198 if (s->do_telnetopt > 1) {
2199 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2200 /* Double IAC means send an IAC */
2201 if (j != i)
2202 buf[j] = buf[i];
2203 j++;
2204 s->do_telnetopt = 1;
2205 } else {
2206 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2207 /* Handle IAC break commands by sending a serial break */
2208 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2209 s->do_telnetopt++;
2210 }
2211 s->do_telnetopt++;
2212 }
2213 if (s->do_telnetopt >= 4) {
2214 s->do_telnetopt = 1;
2215 }
2216 } else {
2217 if ((unsigned char)buf[i] == IAC) {
2218 s->do_telnetopt = 2;
2219 } else {
2220 if (j != i)
2221 buf[j] = buf[i];
2222 j++;
2223 }
2224 }
2225 }
2226 *size = j;
2227 }
2228
2229 static int tcp_get_msgfd(CharDriverState *chr)
2230 {
2231 TCPCharDriver *s = chr->opaque;
2232 int fd = s->msgfd;
2233 s->msgfd = -1;
2234 return fd;
2235 }
2236
2237 #ifndef _WIN32
2238 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2239 {
2240 TCPCharDriver *s = chr->opaque;
2241 struct cmsghdr *cmsg;
2242
2243 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2244 int fd;
2245
2246 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2247 cmsg->cmsg_level != SOL_SOCKET ||
2248 cmsg->cmsg_type != SCM_RIGHTS)
2249 continue;
2250
2251 fd = *((int *)CMSG_DATA(cmsg));
2252 if (fd < 0)
2253 continue;
2254
2255 #ifndef MSG_CMSG_CLOEXEC
2256 qemu_set_cloexec(fd);
2257 #endif
2258 if (s->msgfd != -1)
2259 close(s->msgfd);
2260 s->msgfd = fd;
2261 }
2262 }
2263
2264 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2265 {
2266 TCPCharDriver *s = chr->opaque;
2267 struct msghdr msg = { NULL, };
2268 struct iovec iov[1];
2269 union {
2270 struct cmsghdr cmsg;
2271 char control[CMSG_SPACE(sizeof(int))];
2272 } msg_control;
2273 int flags = 0;
2274 ssize_t ret;
2275
2276 iov[0].iov_base = buf;
2277 iov[0].iov_len = len;
2278
2279 msg.msg_iov = iov;
2280 msg.msg_iovlen = 1;
2281 msg.msg_control = &msg_control;
2282 msg.msg_controllen = sizeof(msg_control);
2283
2284 #ifdef MSG_CMSG_CLOEXEC
2285 flags |= MSG_CMSG_CLOEXEC;
2286 #endif
2287 ret = recvmsg(s->fd, &msg, flags);
2288 if (ret > 0 && s->is_unix) {
2289 unix_process_msgfd(chr, &msg);
2290 }
2291
2292 return ret;
2293 }
2294 #else
2295 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2296 {
2297 TCPCharDriver *s = chr->opaque;
2298 return qemu_recv(s->fd, buf, len, 0);
2299 }
2300 #endif
2301
2302 static void tcp_chr_read(void *opaque)
2303 {
2304 CharDriverState *chr = opaque;
2305 TCPCharDriver *s = chr->opaque;
2306 uint8_t buf[READ_BUF_LEN];
2307 int len, size;
2308
2309 if (!s->connected || s->max_size <= 0)
2310 return;
2311 len = sizeof(buf);
2312 if (len > s->max_size)
2313 len = s->max_size;
2314 size = tcp_chr_recv(chr, (void *)buf, len);
2315 if (size == 0) {
2316 /* connection closed */
2317 s->connected = 0;
2318 if (s->listen_fd >= 0) {
2319 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2320 }
2321 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2322 closesocket(s->fd);
2323 s->fd = -1;
2324 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2325 } else if (size > 0) {
2326 if (s->do_telnetopt)
2327 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2328 if (size > 0)
2329 qemu_chr_be_write(chr, buf, size);
2330 }
2331 }
2332
2333 #ifndef _WIN32
2334 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2335 {
2336 return qemu_chr_open_fd(eventfd, eventfd);
2337 }
2338 #endif
2339
2340 static void tcp_chr_connect(void *opaque)
2341 {
2342 CharDriverState *chr = opaque;
2343 TCPCharDriver *s = chr->opaque;
2344
2345 s->connected = 1;
2346 if (s->fd >= 0) {
2347 qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2348 tcp_chr_read, NULL, chr);
2349 }
2350 qemu_chr_generic_open(chr);
2351 }
2352
2353 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2354 static void tcp_chr_telnet_init(int fd)
2355 {
2356 char buf[3];
2357 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2358 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2359 send(fd, (char *)buf, 3, 0);
2360 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2361 send(fd, (char *)buf, 3, 0);
2362 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2363 send(fd, (char *)buf, 3, 0);
2364 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2365 send(fd, (char *)buf, 3, 0);
2366 }
2367
2368 static void socket_set_nodelay(int fd)
2369 {
2370 int val = 1;
2371 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2372 }
2373
2374 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2375 {
2376 TCPCharDriver *s = chr->opaque;
2377 if (s->fd != -1)
2378 return -1;
2379
2380 socket_set_nonblock(fd);
2381 if (s->do_nodelay)
2382 socket_set_nodelay(fd);
2383 s->fd = fd;
2384 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2385 tcp_chr_connect(chr);
2386
2387 return 0;
2388 }
2389
2390 static void tcp_chr_accept(void *opaque)
2391 {
2392 CharDriverState *chr = opaque;
2393 TCPCharDriver *s = chr->opaque;
2394 struct sockaddr_in saddr;
2395 #ifndef _WIN32
2396 struct sockaddr_un uaddr;
2397 #endif
2398 struct sockaddr *addr;
2399 socklen_t len;
2400 int fd;
2401
2402 for(;;) {
2403 #ifndef _WIN32
2404 if (s->is_unix) {
2405 len = sizeof(uaddr);
2406 addr = (struct sockaddr *)&uaddr;
2407 } else
2408 #endif
2409 {
2410 len = sizeof(saddr);
2411 addr = (struct sockaddr *)&saddr;
2412 }
2413 fd = qemu_accept(s->listen_fd, addr, &len);
2414 if (fd < 0 && errno != EINTR) {
2415 return;
2416 } else if (fd >= 0) {
2417 if (s->do_telnetopt)
2418 tcp_chr_telnet_init(fd);
2419 break;
2420 }
2421 }
2422 if (tcp_chr_add_client(chr, fd) < 0)
2423 close(fd);
2424 }
2425
2426 static void tcp_chr_close(CharDriverState *chr)
2427 {
2428 TCPCharDriver *s = chr->opaque;
2429 if (s->fd >= 0) {
2430 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2431 closesocket(s->fd);
2432 }
2433 if (s->listen_fd >= 0) {
2434 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2435 closesocket(s->listen_fd);
2436 }
2437 g_free(s);
2438 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2439 }
2440
2441 static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
2442 bool is_listen, bool is_telnet,
2443 bool is_waitconnect,
2444 Error **errp)
2445 {
2446 CharDriverState *chr = NULL;
2447 TCPCharDriver *s = NULL;
2448 char host[NI_MAXHOST], serv[NI_MAXSERV];
2449 const char *left = "", *right = "";
2450 struct sockaddr_storage ss;
2451 socklen_t ss_len = sizeof(ss);
2452
2453 memset(&ss, 0, ss_len);
2454 if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2455 error_setg(errp, "getsockname: %s", strerror(errno));
2456 return NULL;
2457 }
2458
2459 chr = g_malloc0(sizeof(CharDriverState));
2460 s = g_malloc0(sizeof(TCPCharDriver));
2461
2462 s->connected = 0;
2463 s->fd = -1;
2464 s->listen_fd = -1;
2465 s->msgfd = -1;
2466
2467 chr->filename = g_malloc(256);
2468 switch (ss.ss_family) {
2469 #ifndef _WIN32
2470 case AF_UNIX:
2471 s->is_unix = 1;
2472 snprintf(chr->filename, 256, "unix:%s%s",
2473 ((struct sockaddr_un *)(&ss))->sun_path,
2474 is_listen ? ",server" : "");
2475 break;
2476 #endif
2477 case AF_INET6:
2478 left = "[";
2479 right = "]";
2480 /* fall through */
2481 case AF_INET:
2482 s->do_nodelay = do_nodelay;
2483 getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
2484 serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
2485 snprintf(chr->filename, 256, "%s:%s:%s%s%s%s",
2486 is_telnet ? "telnet" : "tcp",
2487 left, host, right, serv,
2488 is_listen ? ",server" : "");
2489 break;
2490 }
2491
2492 chr->opaque = s;
2493 chr->chr_write = tcp_chr_write;
2494 chr->chr_close = tcp_chr_close;
2495 chr->get_msgfd = tcp_get_msgfd;
2496 chr->chr_add_client = tcp_chr_add_client;
2497
2498 if (is_listen) {
2499 s->listen_fd = fd;
2500 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2501 if (is_telnet) {
2502 s->do_telnetopt = 1;
2503 }
2504 } else {
2505 s->connected = 1;
2506 s->fd = fd;
2507 socket_set_nodelay(fd);
2508 tcp_chr_connect(chr);
2509 }
2510
2511 if (is_listen && is_waitconnect) {
2512 printf("QEMU waiting for connection on: %s\n",
2513 chr->filename);
2514 tcp_chr_accept(chr);
2515 socket_set_nonblock(s->listen_fd);
2516 }
2517 return chr;
2518 }
2519
2520 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2521 {
2522 CharDriverState *chr = NULL;
2523 Error *local_err = NULL;
2524 int fd = -1;
2525 int is_listen;
2526 int is_waitconnect;
2527 int do_nodelay;
2528 int is_unix;
2529 int is_telnet;
2530
2531 is_listen = qemu_opt_get_bool(opts, "server", 0);
2532 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2533 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2534 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2535 is_unix = qemu_opt_get(opts, "path") != NULL;
2536 if (!is_listen)
2537 is_waitconnect = 0;
2538
2539 if (is_unix) {
2540 if (is_listen) {
2541 fd = unix_listen_opts(opts, &local_err);
2542 } else {
2543 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
2544 }
2545 } else {
2546 if (is_listen) {
2547 fd = inet_listen_opts(opts, 0, &local_err);
2548 } else {
2549 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
2550 }
2551 }
2552 if (fd < 0) {
2553 goto fail;
2554 }
2555
2556 if (!is_waitconnect)
2557 socket_set_nonblock(fd);
2558
2559 chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet,
2560 is_waitconnect, &local_err);
2561 if (error_is_set(&local_err)) {
2562 goto fail;
2563 }
2564 return chr;
2565
2566
2567 fail:
2568 if (local_err) {
2569 qerror_report_err(local_err);
2570 error_free(local_err);
2571 }
2572 if (fd >= 0) {
2573 closesocket(fd);
2574 }
2575 if (chr) {
2576 g_free(chr->opaque);
2577 g_free(chr);
2578 }
2579 return NULL;
2580 }
2581
2582 /***********************************************************/
2583 /* Memory chardev */
2584 typedef struct {
2585 size_t outbuf_size;
2586 size_t outbuf_capacity;
2587 uint8_t *outbuf;
2588 } MemoryDriver;
2589
2590 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2591 {
2592 MemoryDriver *d = chr->opaque;
2593
2594 /* TODO: the QString implementation has the same code, we should
2595 * introduce a generic way to do this in cutils.c */
2596 if (d->outbuf_capacity < d->outbuf_size + len) {
2597 /* grow outbuf */
2598 d->outbuf_capacity += len;
2599 d->outbuf_capacity *= 2;
2600 d->outbuf = g_realloc(d->outbuf, d->outbuf_capacity);
2601 }
2602
2603 memcpy(d->outbuf + d->outbuf_size, buf, len);
2604 d->outbuf_size += len;
2605
2606 return len;
2607 }
2608
2609 void qemu_chr_init_mem(CharDriverState *chr)
2610 {
2611 MemoryDriver *d;
2612
2613 d = g_malloc(sizeof(*d));
2614 d->outbuf_size = 0;
2615 d->outbuf_capacity = 4096;
2616 d->outbuf = g_malloc0(d->outbuf_capacity);
2617
2618 memset(chr, 0, sizeof(*chr));
2619 chr->opaque = d;
2620 chr->chr_write = mem_chr_write;
2621 }
2622
2623 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2624 {
2625 MemoryDriver *d = chr->opaque;
2626 return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2627 }
2628
2629 /* NOTE: this driver can not be closed with qemu_chr_delete()! */
2630 void qemu_chr_close_mem(CharDriverState *chr)
2631 {
2632 MemoryDriver *d = chr->opaque;
2633
2634 g_free(d->outbuf);
2635 g_free(chr->opaque);
2636 chr->opaque = NULL;
2637 chr->chr_write = NULL;
2638 }
2639
2640 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2641 {
2642 const MemoryDriver *d = chr->opaque;
2643 return d->outbuf_size;
2644 }
2645
2646 /*********************************************************/
2647 /* Ring buffer chardev */
2648
2649 typedef struct {
2650 size_t size;
2651 size_t prod;
2652 size_t cons;
2653 uint8_t *cbuf;
2654 } RingBufCharDriver;
2655
2656 static size_t ringbuf_count(const CharDriverState *chr)
2657 {
2658 const RingBufCharDriver *d = chr->opaque;
2659
2660 return d->prod - d->cons;
2661 }
2662
2663 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2664 {
2665 RingBufCharDriver *d = chr->opaque;
2666 int i;
2667
2668 if (!buf || (len < 0)) {
2669 return -1;
2670 }
2671
2672 for (i = 0; i < len; i++ ) {
2673 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
2674 if (d->prod - d->cons > d->size) {
2675 d->cons = d->prod - d->size;
2676 }
2677 }
2678
2679 return 0;
2680 }
2681
2682 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
2683 {
2684 RingBufCharDriver *d = chr->opaque;
2685 int i;
2686
2687 for (i = 0; i < len && d->cons != d->prod; i++) {
2688 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
2689 }
2690
2691 return i;
2692 }
2693
2694 static void ringbuf_chr_close(struct CharDriverState *chr)
2695 {
2696 RingBufCharDriver *d = chr->opaque;
2697
2698 g_free(d->cbuf);
2699 g_free(d);
2700 chr->opaque = NULL;
2701 }
2702
2703 static CharDriverState *qemu_chr_open_ringbuf(QemuOpts *opts)
2704 {
2705 CharDriverState *chr;
2706 RingBufCharDriver *d;
2707
2708 chr = g_malloc0(sizeof(CharDriverState));
2709 d = g_malloc(sizeof(*d));
2710
2711 d->size = qemu_opt_get_size(opts, "size", 0);
2712 if (d->size == 0) {
2713 d->size = 65536;
2714 }
2715
2716 /* The size must be power of 2 */
2717 if (d->size & (d->size - 1)) {
2718 error_report("size of ringbuf device must be power of two");
2719 goto fail;
2720 }
2721
2722 d->prod = 0;
2723 d->cons = 0;
2724 d->cbuf = g_malloc0(d->size);
2725
2726 chr->opaque = d;
2727 chr->chr_write = ringbuf_chr_write;
2728 chr->chr_close = ringbuf_chr_close;
2729
2730 return chr;
2731
2732 fail:
2733 g_free(d);
2734 g_free(chr);
2735 return NULL;
2736 }
2737
2738 static bool chr_is_ringbuf(const CharDriverState *chr)
2739 {
2740 return chr->chr_write == ringbuf_chr_write;
2741 }
2742
2743 void qmp_ringbuf_write(const char *device, const char *data,
2744 bool has_format, enum DataFormat format,
2745 Error **errp)
2746 {
2747 CharDriverState *chr;
2748 const uint8_t *write_data;
2749 int ret;
2750 size_t write_count;
2751
2752 chr = qemu_chr_find(device);
2753 if (!chr) {
2754 error_setg(errp, "Device '%s' not found", device);
2755 return;
2756 }
2757
2758 if (!chr_is_ringbuf(chr)) {
2759 error_setg(errp,"%s is not a ringbuf device", device);
2760 return;
2761 }
2762
2763 if (has_format && (format == DATA_FORMAT_BASE64)) {
2764 write_data = g_base64_decode(data, &write_count);
2765 } else {
2766 write_data = (uint8_t *)data;
2767 write_count = strlen(data);
2768 }
2769
2770 ret = ringbuf_chr_write(chr, write_data, write_count);
2771
2772 if (write_data != (uint8_t *)data) {
2773 g_free((void *)write_data);
2774 }
2775
2776 if (ret < 0) {
2777 error_setg(errp, "Failed to write to device %s", device);
2778 return;
2779 }
2780 }
2781
2782 char *qmp_ringbuf_read(const char *device, int64_t size,
2783 bool has_format, enum DataFormat format,
2784 Error **errp)
2785 {
2786 CharDriverState *chr;
2787 uint8_t *read_data;
2788 size_t count;
2789 char *data;
2790
2791 chr = qemu_chr_find(device);
2792 if (!chr) {
2793 error_setg(errp, "Device '%s' not found", device);
2794 return NULL;
2795 }
2796
2797 if (!chr_is_ringbuf(chr)) {
2798 error_setg(errp,"%s is not a ringbuf device", device);
2799 return NULL;
2800 }
2801
2802 if (size <= 0) {
2803 error_setg(errp, "size must be greater than zero");
2804 return NULL;
2805 }
2806
2807 count = ringbuf_count(chr);
2808 size = size > count ? count : size;
2809 read_data = g_malloc(size + 1);
2810
2811 ringbuf_chr_read(chr, read_data, size);
2812
2813 if (has_format && (format == DATA_FORMAT_BASE64)) {
2814 data = g_base64_encode(read_data, size);
2815 g_free(read_data);
2816 } else {
2817 /*
2818 * FIXME should read only complete, valid UTF-8 characters up
2819 * to @size bytes. Invalid sequences should be replaced by a
2820 * suitable replacement character. Except when (and only
2821 * when) ring buffer lost characters since last read, initial
2822 * continuation characters should be dropped.
2823 */
2824 read_data[size] = 0;
2825 data = (char *)read_data;
2826 }
2827
2828 return data;
2829 }
2830
2831 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2832 {
2833 char host[65], port[33], width[8], height[8];
2834 int pos;
2835 const char *p;
2836 QemuOpts *opts;
2837 Error *local_err = NULL;
2838
2839 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
2840 if (error_is_set(&local_err)) {
2841 qerror_report_err(local_err);
2842 error_free(local_err);
2843 return NULL;
2844 }
2845
2846 if (strstart(filename, "mon:", &p)) {
2847 filename = p;
2848 qemu_opt_set(opts, "mux", "on");
2849 }
2850
2851 if (strcmp(filename, "null") == 0 ||
2852 strcmp(filename, "pty") == 0 ||
2853 strcmp(filename, "msmouse") == 0 ||
2854 strcmp(filename, "braille") == 0 ||
2855 strcmp(filename, "stdio") == 0) {
2856 qemu_opt_set(opts, "backend", filename);
2857 return opts;
2858 }
2859 if (strstart(filename, "vc", &p)) {
2860 qemu_opt_set(opts, "backend", "vc");
2861 if (*p == ':') {
2862 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2863 /* pixels */
2864 qemu_opt_set(opts, "width", width);
2865 qemu_opt_set(opts, "height", height);
2866 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2867 /* chars */
2868 qemu_opt_set(opts, "cols", width);
2869 qemu_opt_set(opts, "rows", height);
2870 } else {
2871 goto fail;
2872 }
2873 }
2874 return opts;
2875 }
2876 if (strcmp(filename, "con:") == 0) {
2877 qemu_opt_set(opts, "backend", "console");
2878 return opts;
2879 }
2880 if (strstart(filename, "COM", NULL)) {
2881 qemu_opt_set(opts, "backend", "serial");
2882 qemu_opt_set(opts, "path", filename);
2883 return opts;
2884 }
2885 if (strstart(filename, "file:", &p)) {
2886 qemu_opt_set(opts, "backend", "file");
2887 qemu_opt_set(opts, "path", p);
2888 return opts;
2889 }
2890 if (strstart(filename, "pipe:", &p)) {
2891 qemu_opt_set(opts, "backend", "pipe");
2892 qemu_opt_set(opts, "path", p);
2893 return opts;
2894 }
2895 if (strstart(filename, "tcp:", &p) ||
2896 strstart(filename, "telnet:", &p)) {
2897 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2898 host[0] = 0;
2899 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2900 goto fail;
2901 }
2902 qemu_opt_set(opts, "backend", "socket");
2903 qemu_opt_set(opts, "host", host);
2904 qemu_opt_set(opts, "port", port);
2905 if (p[pos] == ',') {
2906 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2907 goto fail;
2908 }
2909 if (strstart(filename, "telnet:", &p))
2910 qemu_opt_set(opts, "telnet", "on");
2911 return opts;
2912 }
2913 if (strstart(filename, "udp:", &p)) {
2914 qemu_opt_set(opts, "backend", "udp");
2915 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2916 host[0] = 0;
2917 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2918 goto fail;
2919 }
2920 }
2921 qemu_opt_set(opts, "host", host);
2922 qemu_opt_set(opts, "port", port);
2923 if (p[pos] == '@') {
2924 p += pos + 1;
2925 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2926 host[0] = 0;
2927 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2928 goto fail;
2929 }
2930 }
2931 qemu_opt_set(opts, "localaddr", host);
2932 qemu_opt_set(opts, "localport", port);
2933 }
2934 return opts;
2935 }
2936 if (strstart(filename, "unix:", &p)) {
2937 qemu_opt_set(opts, "backend", "socket");
2938 if (qemu_opts_do_parse(opts, p, "path") != 0)
2939 goto fail;
2940 return opts;
2941 }
2942 if (strstart(filename, "/dev/parport", NULL) ||
2943 strstart(filename, "/dev/ppi", NULL)) {
2944 qemu_opt_set(opts, "backend", "parport");
2945 qemu_opt_set(opts, "path", filename);
2946 return opts;
2947 }
2948 if (strstart(filename, "/dev/", NULL)) {
2949 qemu_opt_set(opts, "backend", "tty");
2950 qemu_opt_set(opts, "path", filename);
2951 return opts;
2952 }
2953
2954 fail:
2955 qemu_opts_del(opts);
2956 return NULL;
2957 }
2958
2959 #ifdef HAVE_CHARDEV_PARPORT
2960
2961 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
2962 {
2963 const char *filename = qemu_opt_get(opts, "path");
2964 int fd;
2965
2966 fd = qemu_open(filename, O_RDWR);
2967 if (fd < 0) {
2968 return NULL;
2969 }
2970 return qemu_chr_open_pp_fd(fd);
2971 }
2972
2973 #endif
2974
2975 static const struct {
2976 const char *name;
2977 CharDriverState *(*open)(QemuOpts *opts);
2978 } backend_table[] = {
2979 { .name = "null", .open = qemu_chr_open_null },
2980 { .name = "socket", .open = qemu_chr_open_socket },
2981 { .name = "udp", .open = qemu_chr_open_udp },
2982 { .name = "msmouse", .open = qemu_chr_open_msmouse },
2983 { .name = "vc", .open = vc_init },
2984 { .name = "memory", .open = qemu_chr_open_ringbuf },
2985 #ifdef _WIN32
2986 { .name = "file", .open = qemu_chr_open_win_file_out },
2987 { .name = "pipe", .open = qemu_chr_open_win_pipe },
2988 { .name = "console", .open = qemu_chr_open_win_con },
2989 { .name = "serial", .open = qemu_chr_open_win },
2990 { .name = "stdio", .open = qemu_chr_open_win_stdio },
2991 #else
2992 { .name = "file", .open = qemu_chr_open_file_out },
2993 { .name = "pipe", .open = qemu_chr_open_pipe },
2994 { .name = "stdio", .open = qemu_chr_open_stdio },
2995 #endif
2996 #ifdef CONFIG_BRLAPI
2997 { .name = "braille", .open = chr_baum_init },
2998 #endif
2999 #ifdef HAVE_CHARDEV_TTY
3000 { .name = "tty", .open = qemu_chr_open_tty },
3001 { .name = "serial", .open = qemu_chr_open_tty },
3002 { .name = "pty", .open = qemu_chr_open_pty },
3003 #endif
3004 #ifdef HAVE_CHARDEV_PARPORT
3005 { .name = "parallel", .open = qemu_chr_open_pp },
3006 { .name = "parport", .open = qemu_chr_open_pp },
3007 #endif
3008 #ifdef CONFIG_SPICE
3009 { .name = "spicevmc", .open = qemu_chr_open_spice },
3010 #if SPICE_SERVER_VERSION >= 0x000c02
3011 { .name = "spiceport", .open = qemu_chr_open_spice_port },
3012 #endif
3013 #endif
3014 };
3015
3016 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3017 void (*init)(struct CharDriverState *s),
3018 Error **errp)
3019 {
3020 CharDriverState *chr;
3021 int i;
3022
3023 if (qemu_opts_id(opts) == NULL) {
3024 error_setg(errp, "chardev: no id specified");
3025 goto err;
3026 }
3027
3028 if (qemu_opt_get(opts, "backend") == NULL) {
3029 error_setg(errp, "chardev: \"%s\" missing backend",
3030 qemu_opts_id(opts));
3031 goto err;
3032 }
3033 for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
3034 if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
3035 break;
3036 }
3037 if (i == ARRAY_SIZE(backend_table)) {
3038 error_setg(errp, "chardev: backend \"%s\" not found",
3039 qemu_opt_get(opts, "backend"));
3040 goto err;
3041 }
3042
3043 chr = backend_table[i].open(opts);
3044 if (!chr) {
3045 error_setg(errp, "chardev: opening backend \"%s\" failed",
3046 qemu_opt_get(opts, "backend"));
3047 goto err;
3048 }
3049
3050 if (!chr->filename)
3051 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
3052 chr->init = init;
3053 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3054
3055 if (qemu_opt_get_bool(opts, "mux", 0)) {
3056 CharDriverState *base = chr;
3057 int len = strlen(qemu_opts_id(opts)) + 6;
3058 base->label = g_malloc(len);
3059 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
3060 chr = qemu_chr_open_mux(base);
3061 chr->filename = base->filename;
3062 chr->avail_connections = MAX_MUX;
3063 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3064 } else {
3065 chr->avail_connections = 1;
3066 }
3067 chr->label = g_strdup(qemu_opts_id(opts));
3068 chr->opts = opts;
3069 return chr;
3070
3071 err:
3072 qemu_opts_del(opts);
3073 return NULL;
3074 }
3075
3076 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3077 {
3078 const char *p;
3079 CharDriverState *chr;
3080 QemuOpts *opts;
3081 Error *err = NULL;
3082
3083 if (strstart(filename, "chardev:", &p)) {
3084 return qemu_chr_find(p);
3085 }
3086
3087 opts = qemu_chr_parse_compat(label, filename);
3088 if (!opts)
3089 return NULL;
3090
3091 chr = qemu_chr_new_from_opts(opts, init, &err);
3092 if (error_is_set(&err)) {
3093 fprintf(stderr, "%s\n", error_get_pretty(err));
3094 error_free(err);
3095 }
3096 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3097 monitor_init(chr, MONITOR_USE_READLINE);
3098 }
3099 return chr;
3100 }
3101
3102 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3103 {
3104 if (chr->chr_set_echo) {
3105 chr->chr_set_echo(chr, echo);
3106 }
3107 }
3108
3109 void qemu_chr_fe_open(struct CharDriverState *chr)
3110 {
3111 if (chr->chr_guest_open) {
3112 chr->chr_guest_open(chr);
3113 }
3114 }
3115
3116 void qemu_chr_fe_close(struct CharDriverState *chr)
3117 {
3118 if (chr->chr_guest_close) {
3119 chr->chr_guest_close(chr);
3120 }
3121 }
3122
3123 void qemu_chr_delete(CharDriverState *chr)
3124 {
3125 QTAILQ_REMOVE(&chardevs, chr, next);
3126 if (chr->chr_close) {
3127 chr->chr_close(chr);
3128 }
3129 g_free(chr->filename);
3130 g_free(chr->label);
3131 if (chr->opts) {
3132 qemu_opts_del(chr->opts);
3133 }
3134 g_free(chr);
3135 }
3136
3137 ChardevInfoList *qmp_query_chardev(Error **errp)
3138 {
3139 ChardevInfoList *chr_list = NULL;
3140 CharDriverState *chr;
3141
3142 QTAILQ_FOREACH(chr, &chardevs, next) {
3143 ChardevInfoList *info = g_malloc0(sizeof(*info));
3144 info->value = g_malloc0(sizeof(*info->value));
3145 info->value->label = g_strdup(chr->label);
3146 info->value->filename = g_strdup(chr->filename);
3147
3148 info->next = chr_list;
3149 chr_list = info;
3150 }
3151
3152 return chr_list;
3153 }
3154
3155 CharDriverState *qemu_chr_find(const char *name)
3156 {
3157 CharDriverState *chr;
3158
3159 QTAILQ_FOREACH(chr, &chardevs, next) {
3160 if (strcmp(chr->label, name) != 0)
3161 continue;
3162 return chr;
3163 }
3164 return NULL;
3165 }
3166
3167 /* Get a character (serial) device interface. */
3168 CharDriverState *qemu_char_get_next_serial(void)
3169 {
3170 static int next_serial;
3171
3172 /* FIXME: This function needs to go away: use chardev properties! */
3173 return serial_hds[next_serial++];
3174 }
3175
3176 QemuOptsList qemu_chardev_opts = {
3177 .name = "chardev",
3178 .implied_opt_name = "backend",
3179 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3180 .desc = {
3181 {
3182 .name = "backend",
3183 .type = QEMU_OPT_STRING,
3184 },{
3185 .name = "path",
3186 .type = QEMU_OPT_STRING,
3187 },{
3188 .name = "host",
3189 .type = QEMU_OPT_STRING,
3190 },{
3191 .name = "port",
3192 .type = QEMU_OPT_STRING,
3193 },{
3194 .name = "localaddr",
3195 .type = QEMU_OPT_STRING,
3196 },{
3197 .name = "localport",
3198 .type = QEMU_OPT_STRING,
3199 },{
3200 .name = "to",
3201 .type = QEMU_OPT_NUMBER,
3202 },{
3203 .name = "ipv4",
3204 .type = QEMU_OPT_BOOL,
3205 },{
3206 .name = "ipv6",
3207 .type = QEMU_OPT_BOOL,
3208 },{
3209 .name = "wait",
3210 .type = QEMU_OPT_BOOL,
3211 },{
3212 .name = "server",
3213 .type = QEMU_OPT_BOOL,
3214 },{
3215 .name = "delay",
3216 .type = QEMU_OPT_BOOL,
3217 },{
3218 .name = "telnet",
3219 .type = QEMU_OPT_BOOL,
3220 },{
3221 .name = "width",
3222 .type = QEMU_OPT_NUMBER,
3223 },{
3224 .name = "height",
3225 .type = QEMU_OPT_NUMBER,
3226 },{
3227 .name = "cols",
3228 .type = QEMU_OPT_NUMBER,
3229 },{
3230 .name = "rows",
3231 .type = QEMU_OPT_NUMBER,
3232 },{
3233 .name = "mux",
3234 .type = QEMU_OPT_BOOL,
3235 },{
3236 .name = "signal",
3237 .type = QEMU_OPT_BOOL,
3238 },{
3239 .name = "name",
3240 .type = QEMU_OPT_STRING,
3241 },{
3242 .name = "debug",
3243 .type = QEMU_OPT_NUMBER,
3244 },{
3245 .name = "size",
3246 .type = QEMU_OPT_SIZE,
3247 },
3248 { /* end of list */ }
3249 },
3250 };
3251
3252 #ifdef _WIN32
3253
3254 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3255 {
3256 HANDLE out;
3257
3258 if (file->in) {
3259 error_setg(errp, "input file not supported");
3260 return NULL;
3261 }
3262
3263 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
3264 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
3265 if (out == INVALID_HANDLE_VALUE) {
3266 error_setg(errp, "open %s failed", file->out);
3267 return NULL;
3268 }
3269 return qemu_chr_open_win_file(out);
3270 }
3271
3272 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3273 Error **errp)
3274 {
3275 return qemu_chr_open_win_path(serial->device);
3276 }
3277
3278 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3279 Error **errp)
3280 {
3281 error_setg(errp, "character device backend type 'parallel' not supported");
3282 return NULL;
3283 }
3284
3285 #else /* WIN32 */
3286
3287 static int qmp_chardev_open_file_source(char *src, int flags,
3288 Error **errp)
3289 {
3290 int fd = -1;
3291
3292 TFR(fd = qemu_open(src, flags, 0666));
3293 if (fd == -1) {
3294 error_setg(errp, "open %s: %s", src, strerror(errno));
3295 }
3296 return fd;
3297 }
3298
3299 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3300 {
3301 int flags, in = -1, out = -1;
3302
3303 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
3304 out = qmp_chardev_open_file_source(file->out, flags, errp);
3305 if (error_is_set(errp)) {
3306 return NULL;
3307 }
3308
3309 if (file->in) {
3310 flags = O_RDONLY;
3311 in = qmp_chardev_open_file_source(file->in, flags, errp);
3312 if (error_is_set(errp)) {
3313 qemu_close(out);
3314 return NULL;
3315 }
3316 }
3317
3318 return qemu_chr_open_fd(in, out);
3319 }
3320
3321 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3322 Error **errp)
3323 {
3324 #ifdef HAVE_CHARDEV_TTY
3325 int fd;
3326
3327 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
3328 if (error_is_set(errp)) {
3329 return NULL;
3330 }
3331 socket_set_nonblock(fd);
3332 return qemu_chr_open_tty_fd(fd);
3333 #else
3334 error_setg(errp, "character device backend type 'serial' not supported");
3335 return NULL;
3336 #endif
3337 }
3338
3339 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3340 Error **errp)
3341 {
3342 #ifdef HAVE_CHARDEV_PARPORT
3343 int fd;
3344
3345 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
3346 if (error_is_set(errp)) {
3347 return NULL;
3348 }
3349 return qemu_chr_open_pp_fd(fd);
3350 #else
3351 error_setg(errp, "character device backend type 'parallel' not supported");
3352 return NULL;
3353 #endif
3354 }
3355
3356 #endif /* WIN32 */
3357
3358 static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
3359 Error **errp)
3360 {
3361 SocketAddress *addr = sock->addr;
3362 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
3363 bool is_listen = sock->has_server ? sock->server : true;
3364 bool is_telnet = sock->has_telnet ? sock->telnet : false;
3365 bool is_waitconnect = sock->has_wait ? sock->wait : false;
3366 int fd;
3367
3368 if (is_listen) {
3369 fd = socket_listen(addr, errp);
3370 } else {
3371 fd = socket_connect(addr, errp, NULL, NULL);
3372 }
3373 if (error_is_set(errp)) {
3374 return NULL;
3375 }
3376 return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
3377 is_telnet, is_waitconnect, errp);
3378 }
3379
3380 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
3381 Error **errp)
3382 {
3383 ChardevReturn *ret = g_new0(ChardevReturn, 1);
3384 CharDriverState *chr = NULL;
3385
3386 chr = qemu_chr_find(id);
3387 if (chr) {
3388 error_setg(errp, "Chardev '%s' already exists", id);
3389 g_free(ret);
3390 return NULL;
3391 }
3392
3393 switch (backend->kind) {
3394 case CHARDEV_BACKEND_KIND_FILE:
3395 chr = qmp_chardev_open_file(backend->file, errp);
3396 break;
3397 case CHARDEV_BACKEND_KIND_SERIAL:
3398 chr = qmp_chardev_open_serial(backend->serial, errp);
3399 break;
3400 case CHARDEV_BACKEND_KIND_PARALLEL:
3401 chr = qmp_chardev_open_parallel(backend->parallel, errp);
3402 break;
3403 case CHARDEV_BACKEND_KIND_SOCKET:
3404 chr = qmp_chardev_open_socket(backend->socket, errp);
3405 break;
3406 #ifdef HAVE_CHARDEV_TTY
3407 case CHARDEV_BACKEND_KIND_PTY:
3408 {
3409 /* qemu_chr_open_pty sets "path" in opts */
3410 QemuOpts *opts;
3411 opts = qemu_opts_create_nofail(qemu_find_opts("chardev"));
3412 chr = qemu_chr_open_pty(opts);
3413 ret->pty = g_strdup(qemu_opt_get(opts, "path"));
3414 ret->has_pty = true;
3415 qemu_opts_del(opts);
3416 break;
3417 }
3418 #endif
3419 case CHARDEV_BACKEND_KIND_NULL:
3420 chr = qemu_chr_open_null(NULL);
3421 break;
3422 default:
3423 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
3424 break;
3425 }
3426
3427 if (chr == NULL && !error_is_set(errp)) {
3428 error_setg(errp, "Failed to create chardev");
3429 }
3430 if (chr) {
3431 chr->label = g_strdup(id);
3432 chr->avail_connections = 1;
3433 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3434 return ret;
3435 } else {
3436 g_free(ret);
3437 return NULL;
3438 }
3439 }
3440
3441 void qmp_chardev_remove(const char *id, Error **errp)
3442 {
3443 CharDriverState *chr;
3444
3445 chr = qemu_chr_find(id);
3446 if (NULL == chr) {
3447 error_setg(errp, "Chardev '%s' not found", id);
3448 return;
3449 }
3450 if (chr->chr_can_read || chr->chr_read ||
3451 chr->chr_event || chr->handler_opaque) {
3452 error_setg(errp, "Chardev '%s' is busy", id);
3453 return;
3454 }
3455 qemu_chr_delete(chr);
3456 }
QEmu