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win32: Switch thread abstraction to us TLS variable internally
[qemu-kvm.git] / qemu-char.c
blobc6382a93f5f5938c92b0102e984e90f74ef4dcba
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 (stdio_nb_clients == 0) {
776 old_fd0_flags = fcntl(0, F_GETFL);
777 tcgetattr (0, &oldtty);
778 fcntl(0, F_SETFL, O_NONBLOCK);
779 atexit(term_exit);
780 }
781
782 chr = qemu_chr_open_fd(0, 1);
783 chr->chr_close = qemu_chr_close_stdio;
784 chr->chr_set_echo = qemu_chr_set_echo_stdio;
785 qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
786 stdio_nb_clients++;
787 stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
788 display_type != DT_NOGRAPHIC);
789 qemu_chr_fe_set_echo(chr, false);
790
791 return chr;
792 }
793
794 #ifdef __sun__
795 /* Once Solaris has openpty(), this is going to be removed. */
796 static int openpty(int *amaster, int *aslave, char *name,
797 struct termios *termp, struct winsize *winp)
798 {
799 const char *slave;
800 int mfd = -1, sfd = -1;
801
802 *amaster = *aslave = -1;
803
804 mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
805 if (mfd < 0)
806 goto err;
807
808 if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
809 goto err;
810
811 if ((slave = ptsname(mfd)) == NULL)
812 goto err;
813
814 if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
815 goto err;
816
817 if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
818 (termp != NULL && tcgetattr(sfd, termp) < 0))
819 goto err;
820
821 if (amaster)
822 *amaster = mfd;
823 if (aslave)
824 *aslave = sfd;
825 if (winp)
826 ioctl(sfd, TIOCSWINSZ, winp);
827
828 return 0;
829
830 err:
831 if (sfd != -1)
832 close(sfd);
833 close(mfd);
834 return -1;
835 }
836
837 static void cfmakeraw (struct termios *termios_p)
838 {
839 termios_p->c_iflag &=
840 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
841 termios_p->c_oflag &= ~OPOST;
842 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
843 termios_p->c_cflag &= ~(CSIZE|PARENB);
844 termios_p->c_cflag |= CS8;
845
846 termios_p->c_cc[VMIN] = 0;
847 termios_p->c_cc[VTIME] = 0;
848 }
849 #endif
850
851 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
852 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
853 || defined(__GLIBC__)
854
855 typedef struct {
856 int fd;
857 int connected;
858 int polling;
859 int read_bytes;
860 QEMUTimer *timer;
861 } PtyCharDriver;
862
863 static void pty_chr_update_read_handler(CharDriverState *chr);
864 static void pty_chr_state(CharDriverState *chr, int connected);
865
866 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
867 {
868 PtyCharDriver *s = chr->opaque;
869
870 if (!s->connected) {
871 /* guest sends data, check for (re-)connect */
872 pty_chr_update_read_handler(chr);
873 return 0;
874 }
875 return send_all(s->fd, buf, len);
876 }
877
878 static int pty_chr_read_poll(void *opaque)
879 {
880 CharDriverState *chr = opaque;
881 PtyCharDriver *s = chr->opaque;
882
883 s->read_bytes = qemu_chr_be_can_write(chr);
884 return s->read_bytes;
885 }
886
887 static void pty_chr_read(void *opaque)
888 {
889 CharDriverState *chr = opaque;
890 PtyCharDriver *s = chr->opaque;
891 int size, len;
892 uint8_t buf[READ_BUF_LEN];
893
894 len = sizeof(buf);
895 if (len > s->read_bytes)
896 len = s->read_bytes;
897 if (len == 0)
898 return;
899 size = read(s->fd, buf, len);
900 if ((size == -1 && errno == EIO) ||
901 (size == 0)) {
902 pty_chr_state(chr, 0);
903 return;
904 }
905 if (size > 0) {
906 pty_chr_state(chr, 1);
907 qemu_chr_be_write(chr, buf, size);
908 }
909 }
910
911 static void pty_chr_update_read_handler(CharDriverState *chr)
912 {
913 PtyCharDriver *s = chr->opaque;
914
915 qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
916 pty_chr_read, NULL, chr);
917 s->polling = 1;
918 /*
919 * Short timeout here: just need wait long enougth that qemu makes
920 * it through the poll loop once. When reconnected we want a
921 * short timeout so we notice it almost instantly. Otherwise
922 * read() gives us -EIO instantly, making pty_chr_state() reset the
923 * timeout to the normal (much longer) poll interval before the
924 * timer triggers.
925 */
926 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 10);
927 }
928
929 static void pty_chr_state(CharDriverState *chr, int connected)
930 {
931 PtyCharDriver *s = chr->opaque;
932
933 if (!connected) {
934 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
935 s->connected = 0;
936 s->polling = 0;
937 /* (re-)connect poll interval for idle guests: once per second.
938 * We check more frequently in case the guests sends data to
939 * the virtual device linked to our pty. */
940 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 1000);
941 } else {
942 if (!s->connected)
943 qemu_chr_generic_open(chr);
944 s->connected = 1;
945 }
946 }
947
948 static void pty_chr_timer(void *opaque)
949 {
950 struct CharDriverState *chr = opaque;
951 PtyCharDriver *s = chr->opaque;
952
953 if (s->connected)
954 return;
955 if (s->polling) {
956 /* If we arrive here without polling being cleared due
957 * read returning -EIO, then we are (re-)connected */
958 pty_chr_state(chr, 1);
959 return;
960 }
961
962 /* Next poll ... */
963 pty_chr_update_read_handler(chr);
964 }
965
966 static void pty_chr_close(struct CharDriverState *chr)
967 {
968 PtyCharDriver *s = chr->opaque;
969
970 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
971 close(s->fd);
972 qemu_del_timer(s->timer);
973 qemu_free_timer(s->timer);
974 g_free(s);
975 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
976 }
977
978 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
979 {
980 CharDriverState *chr;
981 PtyCharDriver *s;
982 struct termios tty;
983 const char *label;
984 int master_fd, slave_fd, len;
985 #if defined(__OpenBSD__) || defined(__DragonFly__)
986 char pty_name[PATH_MAX];
987 #define q_ptsname(x) pty_name
988 #else
989 char *pty_name = NULL;
990 #define q_ptsname(x) ptsname(x)
991 #endif
992
993 if (openpty(&master_fd, &slave_fd, pty_name, NULL, NULL) < 0) {
994 return NULL;
995 }
996
997 /* Set raw attributes on the pty. */
998 tcgetattr(slave_fd, &tty);
999 cfmakeraw(&tty);
1000 tcsetattr(slave_fd, TCSAFLUSH, &tty);
1001 close(slave_fd);
1002
1003 chr = g_malloc0(sizeof(CharDriverState));
1004
1005 len = strlen(q_ptsname(master_fd)) + 5;
1006 chr->filename = g_malloc(len);
1007 snprintf(chr->filename, len, "pty:%s", q_ptsname(master_fd));
1008 qemu_opt_set(opts, "path", q_ptsname(master_fd));
1009
1010 label = qemu_opts_id(opts);
1011 fprintf(stderr, "char device%s%s redirected to %s\n",
1012 label ? " " : "",
1013 label ?: "",
1014 q_ptsname(master_fd));
1015
1016 s = g_malloc0(sizeof(PtyCharDriver));
1017 chr->opaque = s;
1018 chr->chr_write = pty_chr_write;
1019 chr->chr_update_read_handler = pty_chr_update_read_handler;
1020 chr->chr_close = pty_chr_close;
1021
1022 s->fd = master_fd;
1023 s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr);
1024
1025 return chr;
1026 }
1027
1028 static void tty_serial_init(int fd, int speed,
1029 int parity, int data_bits, int stop_bits)
1030 {
1031 struct termios tty;
1032 speed_t spd;
1033
1034 #if 0
1035 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1036 speed, parity, data_bits, stop_bits);
1037 #endif
1038 tcgetattr (fd, &tty);
1039
1040 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1041 speed = speed * 10 / 11;
1042 do {
1043 check_speed(50);
1044 check_speed(75);
1045 check_speed(110);
1046 check_speed(134);
1047 check_speed(150);
1048 check_speed(200);
1049 check_speed(300);
1050 check_speed(600);
1051 check_speed(1200);
1052 check_speed(1800);
1053 check_speed(2400);
1054 check_speed(4800);
1055 check_speed(9600);
1056 check_speed(19200);
1057 check_speed(38400);
1058 /* Non-Posix values follow. They may be unsupported on some systems. */
1059 check_speed(57600);
1060 check_speed(115200);
1061 #ifdef B230400
1062 check_speed(230400);
1063 #endif
1064 #ifdef B460800
1065 check_speed(460800);
1066 #endif
1067 #ifdef B500000
1068 check_speed(500000);
1069 #endif
1070 #ifdef B576000
1071 check_speed(576000);
1072 #endif
1073 #ifdef B921600
1074 check_speed(921600);
1075 #endif
1076 #ifdef B1000000
1077 check_speed(1000000);
1078 #endif
1079 #ifdef B1152000
1080 check_speed(1152000);
1081 #endif
1082 #ifdef B1500000
1083 check_speed(1500000);
1084 #endif
1085 #ifdef B2000000
1086 check_speed(2000000);
1087 #endif
1088 #ifdef B2500000
1089 check_speed(2500000);
1090 #endif
1091 #ifdef B3000000
1092 check_speed(3000000);
1093 #endif
1094 #ifdef B3500000
1095 check_speed(3500000);
1096 #endif
1097 #ifdef B4000000
1098 check_speed(4000000);
1099 #endif
1100 spd = B115200;
1101 } while (0);
1102
1103 cfsetispeed(&tty, spd);
1104 cfsetospeed(&tty, spd);
1105
1106 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1107 |INLCR|IGNCR|ICRNL|IXON);
1108 tty.c_oflag |= OPOST;
1109 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1110 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1111 switch(data_bits) {
1112 default:
1113 case 8:
1114 tty.c_cflag |= CS8;
1115 break;
1116 case 7:
1117 tty.c_cflag |= CS7;
1118 break;
1119 case 6:
1120 tty.c_cflag |= CS6;
1121 break;
1122 case 5:
1123 tty.c_cflag |= CS5;
1124 break;
1125 }
1126 switch(parity) {
1127 default:
1128 case 'N':
1129 break;
1130 case 'E':
1131 tty.c_cflag |= PARENB;
1132 break;
1133 case 'O':
1134 tty.c_cflag |= PARENB | PARODD;
1135 break;
1136 }
1137 if (stop_bits == 2)
1138 tty.c_cflag |= CSTOPB;
1139
1140 tcsetattr (fd, TCSANOW, &tty);
1141 }
1142
1143 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1144 {
1145 FDCharDriver *s = chr->opaque;
1146
1147 switch(cmd) {
1148 case CHR_IOCTL_SERIAL_SET_PARAMS:
1149 {
1150 QEMUSerialSetParams *ssp = arg;
1151 tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1152 ssp->data_bits, ssp->stop_bits);
1153 }
1154 break;
1155 case CHR_IOCTL_SERIAL_SET_BREAK:
1156 {
1157 int enable = *(int *)arg;
1158 if (enable)
1159 tcsendbreak(s->fd_in, 1);
1160 }
1161 break;
1162 case CHR_IOCTL_SERIAL_GET_TIOCM:
1163 {
1164 int sarg = 0;
1165 int *targ = (int *)arg;
1166 ioctl(s->fd_in, TIOCMGET, &sarg);
1167 *targ = 0;
1168 if (sarg & TIOCM_CTS)
1169 *targ |= CHR_TIOCM_CTS;
1170 if (sarg & TIOCM_CAR)
1171 *targ |= CHR_TIOCM_CAR;
1172 if (sarg & TIOCM_DSR)
1173 *targ |= CHR_TIOCM_DSR;
1174 if (sarg & TIOCM_RI)
1175 *targ |= CHR_TIOCM_RI;
1176 if (sarg & TIOCM_DTR)
1177 *targ |= CHR_TIOCM_DTR;
1178 if (sarg & TIOCM_RTS)
1179 *targ |= CHR_TIOCM_RTS;
1180 }
1181 break;
1182 case CHR_IOCTL_SERIAL_SET_TIOCM:
1183 {
1184 int sarg = *(int *)arg;
1185 int targ = 0;
1186 ioctl(s->fd_in, TIOCMGET, &targ);
1187 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1188 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1189 if (sarg & CHR_TIOCM_CTS)
1190 targ |= TIOCM_CTS;
1191 if (sarg & CHR_TIOCM_CAR)
1192 targ |= TIOCM_CAR;
1193 if (sarg & CHR_TIOCM_DSR)
1194 targ |= TIOCM_DSR;
1195 if (sarg & CHR_TIOCM_RI)
1196 targ |= TIOCM_RI;
1197 if (sarg & CHR_TIOCM_DTR)
1198 targ |= TIOCM_DTR;
1199 if (sarg & CHR_TIOCM_RTS)
1200 targ |= TIOCM_RTS;
1201 ioctl(s->fd_in, TIOCMSET, &targ);
1202 }
1203 break;
1204 default:
1205 return -ENOTSUP;
1206 }
1207 return 0;
1208 }
1209
1210 static void qemu_chr_close_tty(CharDriverState *chr)
1211 {
1212 FDCharDriver *s = chr->opaque;
1213 int fd = -1;
1214
1215 if (s) {
1216 fd = s->fd_in;
1217 }
1218
1219 fd_chr_close(chr);
1220
1221 if (fd >= 0) {
1222 close(fd);
1223 }
1224 }
1225
1226 static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
1227 {
1228 const char *filename = qemu_opt_get(opts, "path");
1229 CharDriverState *chr;
1230 int fd;
1231
1232 TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK));
1233 if (fd < 0) {
1234 return NULL;
1235 }
1236 tty_serial_init(fd, 115200, 'N', 8, 1);
1237 chr = qemu_chr_open_fd(fd, fd);
1238 chr->chr_ioctl = tty_serial_ioctl;
1239 chr->chr_close = qemu_chr_close_tty;
1240 return chr;
1241 }
1242 #else /* ! __linux__ && ! __sun__ */
1243 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
1244 {
1245 return NULL;
1246 }
1247 #endif /* __linux__ || __sun__ */
1248
1249 #if defined(__linux__)
1250 typedef struct {
1251 int fd;
1252 int mode;
1253 } ParallelCharDriver;
1254
1255 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1256 {
1257 if (s->mode != mode) {
1258 int m = mode;
1259 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1260 return 0;
1261 s->mode = mode;
1262 }
1263 return 1;
1264 }
1265
1266 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1267 {
1268 ParallelCharDriver *drv = chr->opaque;
1269 int fd = drv->fd;
1270 uint8_t b;
1271
1272 switch(cmd) {
1273 case CHR_IOCTL_PP_READ_DATA:
1274 if (ioctl(fd, PPRDATA, &b) < 0)
1275 return -ENOTSUP;
1276 *(uint8_t *)arg = b;
1277 break;
1278 case CHR_IOCTL_PP_WRITE_DATA:
1279 b = *(uint8_t *)arg;
1280 if (ioctl(fd, PPWDATA, &b) < 0)
1281 return -ENOTSUP;
1282 break;
1283 case CHR_IOCTL_PP_READ_CONTROL:
1284 if (ioctl(fd, PPRCONTROL, &b) < 0)
1285 return -ENOTSUP;
1286 /* Linux gives only the lowest bits, and no way to know data
1287 direction! For better compatibility set the fixed upper
1288 bits. */
1289 *(uint8_t *)arg = b | 0xc0;
1290 break;
1291 case CHR_IOCTL_PP_WRITE_CONTROL:
1292 b = *(uint8_t *)arg;
1293 if (ioctl(fd, PPWCONTROL, &b) < 0)
1294 return -ENOTSUP;
1295 break;
1296 case CHR_IOCTL_PP_READ_STATUS:
1297 if (ioctl(fd, PPRSTATUS, &b) < 0)
1298 return -ENOTSUP;
1299 *(uint8_t *)arg = b;
1300 break;
1301 case CHR_IOCTL_PP_DATA_DIR:
1302 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1303 return -ENOTSUP;
1304 break;
1305 case CHR_IOCTL_PP_EPP_READ_ADDR:
1306 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
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_READ:
1315 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1316 struct ParallelIOArg *parg = arg;
1317 int n = read(fd, parg->buffer, parg->count);
1318 if (n != parg->count) {
1319 return -EIO;
1320 }
1321 }
1322 break;
1323 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1324 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
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 case CHR_IOCTL_PP_EPP_WRITE:
1333 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1334 struct ParallelIOArg *parg = arg;
1335 int n = write(fd, parg->buffer, parg->count);
1336 if (n != parg->count) {
1337 return -EIO;
1338 }
1339 }
1340 break;
1341 default:
1342 return -ENOTSUP;
1343 }
1344 return 0;
1345 }
1346
1347 static void pp_close(CharDriverState *chr)
1348 {
1349 ParallelCharDriver *drv = chr->opaque;
1350 int fd = drv->fd;
1351
1352 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1353 ioctl(fd, PPRELEASE);
1354 close(fd);
1355 g_free(drv);
1356 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1357 }
1358
1359 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1360 {
1361 const char *filename = qemu_opt_get(opts, "path");
1362 CharDriverState *chr;
1363 ParallelCharDriver *drv;
1364 int fd;
1365
1366 TFR(fd = qemu_open(filename, O_RDWR));
1367 if (fd < 0) {
1368 return NULL;
1369 }
1370
1371 if (ioctl(fd, PPCLAIM) < 0) {
1372 close(fd);
1373 return NULL;
1374 }
1375
1376 drv = g_malloc0(sizeof(ParallelCharDriver));
1377 drv->fd = fd;
1378 drv->mode = IEEE1284_MODE_COMPAT;
1379
1380 chr = g_malloc0(sizeof(CharDriverState));
1381 chr->chr_write = null_chr_write;
1382 chr->chr_ioctl = pp_ioctl;
1383 chr->chr_close = pp_close;
1384 chr->opaque = drv;
1385
1386 qemu_chr_generic_open(chr);
1387
1388 return chr;
1389 }
1390 #endif /* __linux__ */
1391
1392 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1393 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1394 {
1395 int fd = (int)(intptr_t)chr->opaque;
1396 uint8_t b;
1397
1398 switch(cmd) {
1399 case CHR_IOCTL_PP_READ_DATA:
1400 if (ioctl(fd, PPIGDATA, &b) < 0)
1401 return -ENOTSUP;
1402 *(uint8_t *)arg = b;
1403 break;
1404 case CHR_IOCTL_PP_WRITE_DATA:
1405 b = *(uint8_t *)arg;
1406 if (ioctl(fd, PPISDATA, &b) < 0)
1407 return -ENOTSUP;
1408 break;
1409 case CHR_IOCTL_PP_READ_CONTROL:
1410 if (ioctl(fd, PPIGCTRL, &b) < 0)
1411 return -ENOTSUP;
1412 *(uint8_t *)arg = b;
1413 break;
1414 case CHR_IOCTL_PP_WRITE_CONTROL:
1415 b = *(uint8_t *)arg;
1416 if (ioctl(fd, PPISCTRL, &b) < 0)
1417 return -ENOTSUP;
1418 break;
1419 case CHR_IOCTL_PP_READ_STATUS:
1420 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1421 return -ENOTSUP;
1422 *(uint8_t *)arg = b;
1423 break;
1424 default:
1425 return -ENOTSUP;
1426 }
1427 return 0;
1428 }
1429
1430 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1431 {
1432 const char *filename = qemu_opt_get(opts, "path");
1433 CharDriverState *chr;
1434 int fd;
1435
1436 fd = qemu_open(filename, O_RDWR);
1437 if (fd < 0) {
1438 return NULL;
1439 }
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(QemuOpts *opts)
1662 {
1663 const char *filename = qemu_opt_get(opts, "path");
1664 CharDriverState *chr;
1665 WinCharState *s;
1666
1667 chr = g_malloc0(sizeof(CharDriverState));
1668 s = g_malloc0(sizeof(WinCharState));
1669 chr->opaque = s;
1670 chr->chr_write = win_chr_write;
1671 chr->chr_close = win_chr_close;
1672
1673 if (win_chr_init(chr, filename) < 0) {
1674 g_free(s);
1675 g_free(chr);
1676 return NULL;
1677 }
1678 qemu_chr_generic_open(chr);
1679 return chr;
1680 }
1681
1682 static int win_chr_pipe_poll(void *opaque)
1683 {
1684 CharDriverState *chr = opaque;
1685 WinCharState *s = chr->opaque;
1686 DWORD size;
1687
1688 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1689 if (size > 0) {
1690 s->len = size;
1691 win_chr_read_poll(chr);
1692 win_chr_read(chr);
1693 return 1;
1694 }
1695 return 0;
1696 }
1697
1698 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1699 {
1700 WinCharState *s = chr->opaque;
1701 OVERLAPPED ov;
1702 int ret;
1703 DWORD size;
1704 char openname[256];
1705
1706 s->fpipe = TRUE;
1707
1708 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1709 if (!s->hsend) {
1710 fprintf(stderr, "Failed CreateEvent\n");
1711 goto fail;
1712 }
1713 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1714 if (!s->hrecv) {
1715 fprintf(stderr, "Failed CreateEvent\n");
1716 goto fail;
1717 }
1718
1719 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1720 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1721 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1722 PIPE_WAIT,
1723 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1724 if (s->hcom == INVALID_HANDLE_VALUE) {
1725 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1726 s->hcom = NULL;
1727 goto fail;
1728 }
1729
1730 ZeroMemory(&ov, sizeof(ov));
1731 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1732 ret = ConnectNamedPipe(s->hcom, &ov);
1733 if (ret) {
1734 fprintf(stderr, "Failed ConnectNamedPipe\n");
1735 goto fail;
1736 }
1737
1738 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1739 if (!ret) {
1740 fprintf(stderr, "Failed GetOverlappedResult\n");
1741 if (ov.hEvent) {
1742 CloseHandle(ov.hEvent);
1743 ov.hEvent = NULL;
1744 }
1745 goto fail;
1746 }
1747
1748 if (ov.hEvent) {
1749 CloseHandle(ov.hEvent);
1750 ov.hEvent = NULL;
1751 }
1752 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1753 return 0;
1754
1755 fail:
1756 win_chr_close(chr);
1757 return -1;
1758 }
1759
1760
1761 static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts)
1762 {
1763 const char *filename = qemu_opt_get(opts, "path");
1764 CharDriverState *chr;
1765 WinCharState *s;
1766
1767 chr = g_malloc0(sizeof(CharDriverState));
1768 s = g_malloc0(sizeof(WinCharState));
1769 chr->opaque = s;
1770 chr->chr_write = win_chr_write;
1771 chr->chr_close = win_chr_close;
1772
1773 if (win_chr_pipe_init(chr, filename) < 0) {
1774 g_free(s);
1775 g_free(chr);
1776 return NULL;
1777 }
1778 qemu_chr_generic_open(chr);
1779 return chr;
1780 }
1781
1782 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1783 {
1784 CharDriverState *chr;
1785 WinCharState *s;
1786
1787 chr = g_malloc0(sizeof(CharDriverState));
1788 s = g_malloc0(sizeof(WinCharState));
1789 s->hcom = fd_out;
1790 chr->opaque = s;
1791 chr->chr_write = win_chr_write;
1792 qemu_chr_generic_open(chr);
1793 return chr;
1794 }
1795
1796 static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts)
1797 {
1798 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1799 }
1800
1801 static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts)
1802 {
1803 const char *file_out = qemu_opt_get(opts, "path");
1804 HANDLE fd_out;
1805
1806 fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1807 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1808 if (fd_out == INVALID_HANDLE_VALUE) {
1809 return NULL;
1810 }
1811
1812 return qemu_chr_open_win_file(fd_out);
1813 }
1814
1815 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1816 {
1817 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1818 DWORD dwSize;
1819 int len1;
1820
1821 len1 = len;
1822
1823 while (len1 > 0) {
1824 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1825 break;
1826 }
1827 buf += dwSize;
1828 len1 -= dwSize;
1829 }
1830
1831 return len - len1;
1832 }
1833
1834 static void win_stdio_wait_func(void *opaque)
1835 {
1836 CharDriverState *chr = opaque;
1837 WinStdioCharState *stdio = chr->opaque;
1838 INPUT_RECORD buf[4];
1839 int ret;
1840 DWORD dwSize;
1841 int i;
1842
1843 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
1844 &dwSize);
1845
1846 if (!ret) {
1847 /* Avoid error storm */
1848 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
1849 return;
1850 }
1851
1852 for (i = 0; i < dwSize; i++) {
1853 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
1854
1855 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
1856 int j;
1857 if (kev->uChar.AsciiChar != 0) {
1858 for (j = 0; j < kev->wRepeatCount; j++) {
1859 if (qemu_chr_be_can_write(chr)) {
1860 uint8_t c = kev->uChar.AsciiChar;
1861 qemu_chr_be_write(chr, &c, 1);
1862 }
1863 }
1864 }
1865 }
1866 }
1867 }
1868
1869 static DWORD WINAPI win_stdio_thread(LPVOID param)
1870 {
1871 CharDriverState *chr = param;
1872 WinStdioCharState *stdio = chr->opaque;
1873 int ret;
1874 DWORD dwSize;
1875
1876 while (1) {
1877
1878 /* Wait for one byte */
1879 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
1880
1881 /* Exit in case of error, continue if nothing read */
1882 if (!ret) {
1883 break;
1884 }
1885 if (!dwSize) {
1886 continue;
1887 }
1888
1889 /* Some terminal emulator returns \r\n for Enter, just pass \n */
1890 if (stdio->win_stdio_buf == '\r') {
1891 continue;
1892 }
1893
1894 /* Signal the main thread and wait until the byte was eaten */
1895 if (!SetEvent(stdio->hInputReadyEvent)) {
1896 break;
1897 }
1898 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
1899 != WAIT_OBJECT_0) {
1900 break;
1901 }
1902 }
1903
1904 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
1905 return 0;
1906 }
1907
1908 static void win_stdio_thread_wait_func(void *opaque)
1909 {
1910 CharDriverState *chr = opaque;
1911 WinStdioCharState *stdio = chr->opaque;
1912
1913 if (qemu_chr_be_can_write(chr)) {
1914 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
1915 }
1916
1917 SetEvent(stdio->hInputDoneEvent);
1918 }
1919
1920 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
1921 {
1922 WinStdioCharState *stdio = chr->opaque;
1923 DWORD dwMode = 0;
1924
1925 GetConsoleMode(stdio->hStdIn, &dwMode);
1926
1927 if (echo) {
1928 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
1929 } else {
1930 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
1931 }
1932 }
1933
1934 static void win_stdio_close(CharDriverState *chr)
1935 {
1936 WinStdioCharState *stdio = chr->opaque;
1937
1938 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
1939 CloseHandle(stdio->hInputReadyEvent);
1940 }
1941 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
1942 CloseHandle(stdio->hInputDoneEvent);
1943 }
1944 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
1945 TerminateThread(stdio->hInputThread, 0);
1946 }
1947
1948 g_free(chr->opaque);
1949 g_free(chr);
1950 stdio_nb_clients--;
1951 }
1952
1953 static CharDriverState *qemu_chr_open_win_stdio(QemuOpts *opts)
1954 {
1955 CharDriverState *chr;
1956 WinStdioCharState *stdio;
1957 DWORD dwMode;
1958 int is_console = 0;
1959
1960 if (stdio_nb_clients >= STDIO_MAX_CLIENTS
1961 || ((display_type != DT_NOGRAPHIC) && (stdio_nb_clients != 0))) {
1962 return NULL;
1963 }
1964
1965 chr = g_malloc0(sizeof(CharDriverState));
1966 stdio = g_malloc0(sizeof(WinStdioCharState));
1967
1968 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
1969 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
1970 fprintf(stderr, "cannot open stdio: invalid handle\n");
1971 exit(1);
1972 }
1973
1974 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
1975
1976 chr->opaque = stdio;
1977 chr->chr_write = win_stdio_write;
1978 chr->chr_close = win_stdio_close;
1979
1980 if (stdio_nb_clients == 0) {
1981 if (is_console) {
1982 if (qemu_add_wait_object(stdio->hStdIn,
1983 win_stdio_wait_func, chr)) {
1984 fprintf(stderr, "qemu_add_wait_object: failed\n");
1985 }
1986 } else {
1987 DWORD dwId;
1988
1989 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
1990 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
1991 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
1992 chr, 0, &dwId);
1993
1994 if (stdio->hInputThread == INVALID_HANDLE_VALUE
1995 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
1996 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
1997 fprintf(stderr, "cannot create stdio thread or event\n");
1998 exit(1);
1999 }
2000 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2001 win_stdio_thread_wait_func, chr)) {
2002 fprintf(stderr, "qemu_add_wait_object: failed\n");
2003 }
2004 }
2005 }
2006
2007 dwMode |= ENABLE_LINE_INPUT;
2008
2009 stdio_clients[stdio_nb_clients++] = chr;
2010 if (stdio_nb_clients == 1 && is_console) {
2011 /* set the terminal in raw mode */
2012 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2013 dwMode |= ENABLE_PROCESSED_INPUT;
2014 }
2015
2016 SetConsoleMode(stdio->hStdIn, dwMode);
2017
2018 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2019 qemu_chr_fe_set_echo(chr, false);
2020
2021 return chr;
2022 }
2023 #endif /* !_WIN32 */
2024
2025 /***********************************************************/
2026 /* UDP Net console */
2027
2028 typedef struct {
2029 int fd;
2030 uint8_t buf[READ_BUF_LEN];
2031 int bufcnt;
2032 int bufptr;
2033 int max_size;
2034 } NetCharDriver;
2035
2036 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2037 {
2038 NetCharDriver *s = chr->opaque;
2039
2040 return send(s->fd, (const void *)buf, len, 0);
2041 }
2042
2043 static int udp_chr_read_poll(void *opaque)
2044 {
2045 CharDriverState *chr = opaque;
2046 NetCharDriver *s = chr->opaque;
2047
2048 s->max_size = qemu_chr_be_can_write(chr);
2049
2050 /* If there were any stray characters in the queue process them
2051 * first
2052 */
2053 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2054 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2055 s->bufptr++;
2056 s->max_size = qemu_chr_be_can_write(chr);
2057 }
2058 return s->max_size;
2059 }
2060
2061 static void udp_chr_read(void *opaque)
2062 {
2063 CharDriverState *chr = opaque;
2064 NetCharDriver *s = chr->opaque;
2065
2066 if (s->max_size == 0)
2067 return;
2068 s->bufcnt = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0);
2069 s->bufptr = s->bufcnt;
2070 if (s->bufcnt <= 0)
2071 return;
2072
2073 s->bufptr = 0;
2074 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2075 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2076 s->bufptr++;
2077 s->max_size = qemu_chr_be_can_write(chr);
2078 }
2079 }
2080
2081 static void udp_chr_update_read_handler(CharDriverState *chr)
2082 {
2083 NetCharDriver *s = chr->opaque;
2084
2085 if (s->fd >= 0) {
2086 qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
2087 udp_chr_read, NULL, chr);
2088 }
2089 }
2090
2091 static void udp_chr_close(CharDriverState *chr)
2092 {
2093 NetCharDriver *s = chr->opaque;
2094 if (s->fd >= 0) {
2095 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2096 closesocket(s->fd);
2097 }
2098 g_free(s);
2099 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2100 }
2101
2102 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2103 {
2104 CharDriverState *chr = NULL;
2105 NetCharDriver *s = NULL;
2106 Error *local_err = NULL;
2107 int fd = -1;
2108
2109 chr = g_malloc0(sizeof(CharDriverState));
2110 s = g_malloc0(sizeof(NetCharDriver));
2111
2112 fd = inet_dgram_opts(opts, &local_err);
2113 if (fd < 0) {
2114 goto return_err;
2115 }
2116
2117 s->fd = fd;
2118 s->bufcnt = 0;
2119 s->bufptr = 0;
2120 chr->opaque = s;
2121 chr->chr_write = udp_chr_write;
2122 chr->chr_update_read_handler = udp_chr_update_read_handler;
2123 chr->chr_close = udp_chr_close;
2124 return chr;
2125
2126 return_err:
2127 if (local_err) {
2128 qerror_report_err(local_err);
2129 error_free(local_err);
2130 }
2131 g_free(chr);
2132 g_free(s);
2133 if (fd >= 0) {
2134 closesocket(fd);
2135 }
2136 return NULL;
2137 }
2138
2139 /***********************************************************/
2140 /* TCP Net console */
2141
2142 typedef struct {
2143 int fd, listen_fd;
2144 int connected;
2145 int max_size;
2146 int do_telnetopt;
2147 int do_nodelay;
2148 int is_unix;
2149 int msgfd;
2150 } TCPCharDriver;
2151
2152 static void tcp_chr_accept(void *opaque);
2153
2154 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2155 {
2156 TCPCharDriver *s = chr->opaque;
2157 if (s->connected) {
2158 return send_all(s->fd, buf, len);
2159 } else {
2160 /* XXX: indicate an error ? */
2161 return len;
2162 }
2163 }
2164
2165 static int tcp_chr_read_poll(void *opaque)
2166 {
2167 CharDriverState *chr = opaque;
2168 TCPCharDriver *s = chr->opaque;
2169 if (!s->connected)
2170 return 0;
2171 s->max_size = qemu_chr_be_can_write(chr);
2172 return s->max_size;
2173 }
2174
2175 #define IAC 255
2176 #define IAC_BREAK 243
2177 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2178 TCPCharDriver *s,
2179 uint8_t *buf, int *size)
2180 {
2181 /* Handle any telnet client's basic IAC options to satisfy char by
2182 * char mode with no echo. All IAC options will be removed from
2183 * the buf and the do_telnetopt variable will be used to track the
2184 * state of the width of the IAC information.
2185 *
2186 * IAC commands come in sets of 3 bytes with the exception of the
2187 * "IAC BREAK" command and the double IAC.
2188 */
2189
2190 int i;
2191 int j = 0;
2192
2193 for (i = 0; i < *size; i++) {
2194 if (s->do_telnetopt > 1) {
2195 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2196 /* Double IAC means send an IAC */
2197 if (j != i)
2198 buf[j] = buf[i];
2199 j++;
2200 s->do_telnetopt = 1;
2201 } else {
2202 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2203 /* Handle IAC break commands by sending a serial break */
2204 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2205 s->do_telnetopt++;
2206 }
2207 s->do_telnetopt++;
2208 }
2209 if (s->do_telnetopt >= 4) {
2210 s->do_telnetopt = 1;
2211 }
2212 } else {
2213 if ((unsigned char)buf[i] == IAC) {
2214 s->do_telnetopt = 2;
2215 } else {
2216 if (j != i)
2217 buf[j] = buf[i];
2218 j++;
2219 }
2220 }
2221 }
2222 *size = j;
2223 }
2224
2225 static int tcp_get_msgfd(CharDriverState *chr)
2226 {
2227 TCPCharDriver *s = chr->opaque;
2228 int fd = s->msgfd;
2229 s->msgfd = -1;
2230 return fd;
2231 }
2232
2233 #ifndef _WIN32
2234 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2235 {
2236 TCPCharDriver *s = chr->opaque;
2237 struct cmsghdr *cmsg;
2238
2239 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2240 int fd;
2241
2242 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2243 cmsg->cmsg_level != SOL_SOCKET ||
2244 cmsg->cmsg_type != SCM_RIGHTS)
2245 continue;
2246
2247 fd = *((int *)CMSG_DATA(cmsg));
2248 if (fd < 0)
2249 continue;
2250
2251 #ifndef MSG_CMSG_CLOEXEC
2252 qemu_set_cloexec(fd);
2253 #endif
2254 if (s->msgfd != -1)
2255 close(s->msgfd);
2256 s->msgfd = fd;
2257 }
2258 }
2259
2260 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2261 {
2262 TCPCharDriver *s = chr->opaque;
2263 struct msghdr msg = { NULL, };
2264 struct iovec iov[1];
2265 union {
2266 struct cmsghdr cmsg;
2267 char control[CMSG_SPACE(sizeof(int))];
2268 } msg_control;
2269 int flags = 0;
2270 ssize_t ret;
2271
2272 iov[0].iov_base = buf;
2273 iov[0].iov_len = len;
2274
2275 msg.msg_iov = iov;
2276 msg.msg_iovlen = 1;
2277 msg.msg_control = &msg_control;
2278 msg.msg_controllen = sizeof(msg_control);
2279
2280 #ifdef MSG_CMSG_CLOEXEC
2281 flags |= MSG_CMSG_CLOEXEC;
2282 #endif
2283 ret = recvmsg(s->fd, &msg, flags);
2284 if (ret > 0 && s->is_unix) {
2285 unix_process_msgfd(chr, &msg);
2286 }
2287
2288 return ret;
2289 }
2290 #else
2291 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2292 {
2293 TCPCharDriver *s = chr->opaque;
2294 return qemu_recv(s->fd, buf, len, 0);
2295 }
2296 #endif
2297
2298 static void tcp_chr_read(void *opaque)
2299 {
2300 CharDriverState *chr = opaque;
2301 TCPCharDriver *s = chr->opaque;
2302 uint8_t buf[READ_BUF_LEN];
2303 int len, size;
2304
2305 if (!s->connected || s->max_size <= 0)
2306 return;
2307 len = sizeof(buf);
2308 if (len > s->max_size)
2309 len = s->max_size;
2310 size = tcp_chr_recv(chr, (void *)buf, len);
2311 if (size == 0) {
2312 /* connection closed */
2313 s->connected = 0;
2314 if (s->listen_fd >= 0) {
2315 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2316 }
2317 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2318 closesocket(s->fd);
2319 s->fd = -1;
2320 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2321 } else if (size > 0) {
2322 if (s->do_telnetopt)
2323 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2324 if (size > 0)
2325 qemu_chr_be_write(chr, buf, size);
2326 }
2327 }
2328
2329 #ifndef _WIN32
2330 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2331 {
2332 return qemu_chr_open_fd(eventfd, eventfd);
2333 }
2334 #endif
2335
2336 static void tcp_chr_connect(void *opaque)
2337 {
2338 CharDriverState *chr = opaque;
2339 TCPCharDriver *s = chr->opaque;
2340
2341 s->connected = 1;
2342 if (s->fd >= 0) {
2343 qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2344 tcp_chr_read, NULL, chr);
2345 }
2346 qemu_chr_generic_open(chr);
2347 }
2348
2349 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2350 static void tcp_chr_telnet_init(int fd)
2351 {
2352 char buf[3];
2353 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2354 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2355 send(fd, (char *)buf, 3, 0);
2356 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2357 send(fd, (char *)buf, 3, 0);
2358 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2359 send(fd, (char *)buf, 3, 0);
2360 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2361 send(fd, (char *)buf, 3, 0);
2362 }
2363
2364 static void socket_set_nodelay(int fd)
2365 {
2366 int val = 1;
2367 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2368 }
2369
2370 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2371 {
2372 TCPCharDriver *s = chr->opaque;
2373 if (s->fd != -1)
2374 return -1;
2375
2376 socket_set_nonblock(fd);
2377 if (s->do_nodelay)
2378 socket_set_nodelay(fd);
2379 s->fd = fd;
2380 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2381 tcp_chr_connect(chr);
2382
2383 return 0;
2384 }
2385
2386 static void tcp_chr_accept(void *opaque)
2387 {
2388 CharDriverState *chr = opaque;
2389 TCPCharDriver *s = chr->opaque;
2390 struct sockaddr_in saddr;
2391 #ifndef _WIN32
2392 struct sockaddr_un uaddr;
2393 #endif
2394 struct sockaddr *addr;
2395 socklen_t len;
2396 int fd;
2397
2398 for(;;) {
2399 #ifndef _WIN32
2400 if (s->is_unix) {
2401 len = sizeof(uaddr);
2402 addr = (struct sockaddr *)&uaddr;
2403 } else
2404 #endif
2405 {
2406 len = sizeof(saddr);
2407 addr = (struct sockaddr *)&saddr;
2408 }
2409 fd = qemu_accept(s->listen_fd, addr, &len);
2410 if (fd < 0 && errno != EINTR) {
2411 return;
2412 } else if (fd >= 0) {
2413 if (s->do_telnetopt)
2414 tcp_chr_telnet_init(fd);
2415 break;
2416 }
2417 }
2418 if (tcp_chr_add_client(chr, fd) < 0)
2419 close(fd);
2420 }
2421
2422 static void tcp_chr_close(CharDriverState *chr)
2423 {
2424 TCPCharDriver *s = chr->opaque;
2425 if (s->fd >= 0) {
2426 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2427 closesocket(s->fd);
2428 }
2429 if (s->listen_fd >= 0) {
2430 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2431 closesocket(s->listen_fd);
2432 }
2433 g_free(s);
2434 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2435 }
2436
2437 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2438 {
2439 CharDriverState *chr = NULL;
2440 TCPCharDriver *s = NULL;
2441 Error *local_err = NULL;
2442 int fd = -1;
2443 int is_listen;
2444 int is_waitconnect;
2445 int do_nodelay;
2446 int is_unix;
2447 int is_telnet;
2448
2449 is_listen = qemu_opt_get_bool(opts, "server", 0);
2450 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2451 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2452 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2453 is_unix = qemu_opt_get(opts, "path") != NULL;
2454 if (!is_listen)
2455 is_waitconnect = 0;
2456
2457 chr = g_malloc0(sizeof(CharDriverState));
2458 s = g_malloc0(sizeof(TCPCharDriver));
2459
2460 if (is_unix) {
2461 if (is_listen) {
2462 fd = unix_listen_opts(opts, &local_err);
2463 } else {
2464 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
2465 }
2466 } else {
2467 if (is_listen) {
2468 fd = inet_listen_opts(opts, 0, &local_err);
2469 } else {
2470 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
2471 }
2472 }
2473 if (fd < 0) {
2474 goto fail;
2475 }
2476
2477 if (!is_waitconnect)
2478 socket_set_nonblock(fd);
2479
2480 s->connected = 0;
2481 s->fd = -1;
2482 s->listen_fd = -1;
2483 s->msgfd = -1;
2484 s->is_unix = is_unix;
2485 s->do_nodelay = do_nodelay && !is_unix;
2486
2487 chr->opaque = s;
2488 chr->chr_write = tcp_chr_write;
2489 chr->chr_close = tcp_chr_close;
2490 chr->get_msgfd = tcp_get_msgfd;
2491 chr->chr_add_client = tcp_chr_add_client;
2492
2493 if (is_listen) {
2494 s->listen_fd = fd;
2495 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2496 if (is_telnet)
2497 s->do_telnetopt = 1;
2498
2499 } else {
2500 s->connected = 1;
2501 s->fd = fd;
2502 socket_set_nodelay(fd);
2503 tcp_chr_connect(chr);
2504 }
2505
2506 /* for "info chardev" monitor command */
2507 chr->filename = g_malloc(256);
2508 if (is_unix) {
2509 snprintf(chr->filename, 256, "unix:%s%s",
2510 qemu_opt_get(opts, "path"),
2511 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2512 } else if (is_telnet) {
2513 snprintf(chr->filename, 256, "telnet:%s:%s%s",
2514 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2515 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2516 } else {
2517 snprintf(chr->filename, 256, "tcp:%s:%s%s",
2518 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2519 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2520 }
2521
2522 if (is_listen && is_waitconnect) {
2523 printf("QEMU waiting for connection on: %s\n",
2524 chr->filename);
2525 tcp_chr_accept(chr);
2526 socket_set_nonblock(s->listen_fd);
2527 }
2528 return chr;
2529
2530 fail:
2531 if (local_err) {
2532 qerror_report_err(local_err);
2533 error_free(local_err);
2534 }
2535 if (fd >= 0) {
2536 closesocket(fd);
2537 }
2538 g_free(s);
2539 g_free(chr);
2540 return NULL;
2541 }
2542
2543 /***********************************************************/
2544 /* Memory chardev */
2545 typedef struct {
2546 size_t outbuf_size;
2547 size_t outbuf_capacity;
2548 uint8_t *outbuf;
2549 } MemoryDriver;
2550
2551 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2552 {
2553 MemoryDriver *d = chr->opaque;
2554
2555 /* TODO: the QString implementation has the same code, we should
2556 * introduce a generic way to do this in cutils.c */
2557 if (d->outbuf_capacity < d->outbuf_size + len) {
2558 /* grow outbuf */
2559 d->outbuf_capacity += len;
2560 d->outbuf_capacity *= 2;
2561 d->outbuf = g_realloc(d->outbuf, d->outbuf_capacity);
2562 }
2563
2564 memcpy(d->outbuf + d->outbuf_size, buf, len);
2565 d->outbuf_size += len;
2566
2567 return len;
2568 }
2569
2570 void qemu_chr_init_mem(CharDriverState *chr)
2571 {
2572 MemoryDriver *d;
2573
2574 d = g_malloc(sizeof(*d));
2575 d->outbuf_size = 0;
2576 d->outbuf_capacity = 4096;
2577 d->outbuf = g_malloc0(d->outbuf_capacity);
2578
2579 memset(chr, 0, sizeof(*chr));
2580 chr->opaque = d;
2581 chr->chr_write = mem_chr_write;
2582 }
2583
2584 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2585 {
2586 MemoryDriver *d = chr->opaque;
2587 return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2588 }
2589
2590 /* NOTE: this driver can not be closed with qemu_chr_delete()! */
2591 void qemu_chr_close_mem(CharDriverState *chr)
2592 {
2593 MemoryDriver *d = chr->opaque;
2594
2595 g_free(d->outbuf);
2596 g_free(chr->opaque);
2597 chr->opaque = NULL;
2598 chr->chr_write = NULL;
2599 }
2600
2601 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2602 {
2603 const MemoryDriver *d = chr->opaque;
2604 return d->outbuf_size;
2605 }
2606
2607 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2608 {
2609 char host[65], port[33], width[8], height[8];
2610 int pos;
2611 const char *p;
2612 QemuOpts *opts;
2613 Error *local_err = NULL;
2614
2615 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
2616 if (error_is_set(&local_err)) {
2617 qerror_report_err(local_err);
2618 error_free(local_err);
2619 return NULL;
2620 }
2621
2622 if (strstart(filename, "mon:", &p)) {
2623 filename = p;
2624 qemu_opt_set(opts, "mux", "on");
2625 }
2626
2627 if (strcmp(filename, "null") == 0 ||
2628 strcmp(filename, "pty") == 0 ||
2629 strcmp(filename, "msmouse") == 0 ||
2630 strcmp(filename, "braille") == 0 ||
2631 strcmp(filename, "stdio") == 0) {
2632 qemu_opt_set(opts, "backend", filename);
2633 return opts;
2634 }
2635 if (strstart(filename, "vc", &p)) {
2636 qemu_opt_set(opts, "backend", "vc");
2637 if (*p == ':') {
2638 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2639 /* pixels */
2640 qemu_opt_set(opts, "width", width);
2641 qemu_opt_set(opts, "height", height);
2642 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2643 /* chars */
2644 qemu_opt_set(opts, "cols", width);
2645 qemu_opt_set(opts, "rows", height);
2646 } else {
2647 goto fail;
2648 }
2649 }
2650 return opts;
2651 }
2652 if (strcmp(filename, "con:") == 0) {
2653 qemu_opt_set(opts, "backend", "console");
2654 return opts;
2655 }
2656 if (strstart(filename, "COM", NULL)) {
2657 qemu_opt_set(opts, "backend", "serial");
2658 qemu_opt_set(opts, "path", filename);
2659 return opts;
2660 }
2661 if (strstart(filename, "file:", &p)) {
2662 qemu_opt_set(opts, "backend", "file");
2663 qemu_opt_set(opts, "path", p);
2664 return opts;
2665 }
2666 if (strstart(filename, "pipe:", &p)) {
2667 qemu_opt_set(opts, "backend", "pipe");
2668 qemu_opt_set(opts, "path", p);
2669 return opts;
2670 }
2671 if (strstart(filename, "tcp:", &p) ||
2672 strstart(filename, "telnet:", &p)) {
2673 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2674 host[0] = 0;
2675 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2676 goto fail;
2677 }
2678 qemu_opt_set(opts, "backend", "socket");
2679 qemu_opt_set(opts, "host", host);
2680 qemu_opt_set(opts, "port", port);
2681 if (p[pos] == ',') {
2682 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2683 goto fail;
2684 }
2685 if (strstart(filename, "telnet:", &p))
2686 qemu_opt_set(opts, "telnet", "on");
2687 return opts;
2688 }
2689 if (strstart(filename, "udp:", &p)) {
2690 qemu_opt_set(opts, "backend", "udp");
2691 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2692 host[0] = 0;
2693 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2694 goto fail;
2695 }
2696 }
2697 qemu_opt_set(opts, "host", host);
2698 qemu_opt_set(opts, "port", port);
2699 if (p[pos] == '@') {
2700 p += pos + 1;
2701 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2702 host[0] = 0;
2703 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2704 goto fail;
2705 }
2706 }
2707 qemu_opt_set(opts, "localaddr", host);
2708 qemu_opt_set(opts, "localport", port);
2709 }
2710 return opts;
2711 }
2712 if (strstart(filename, "unix:", &p)) {
2713 qemu_opt_set(opts, "backend", "socket");
2714 if (qemu_opts_do_parse(opts, p, "path") != 0)
2715 goto fail;
2716 return opts;
2717 }
2718 if (strstart(filename, "/dev/parport", NULL) ||
2719 strstart(filename, "/dev/ppi", NULL)) {
2720 qemu_opt_set(opts, "backend", "parport");
2721 qemu_opt_set(opts, "path", filename);
2722 return opts;
2723 }
2724 if (strstart(filename, "/dev/", NULL)) {
2725 qemu_opt_set(opts, "backend", "tty");
2726 qemu_opt_set(opts, "path", filename);
2727 return opts;
2728 }
2729
2730 fail:
2731 qemu_opts_del(opts);
2732 return NULL;
2733 }
2734
2735 static const struct {
2736 const char *name;
2737 CharDriverState *(*open)(QemuOpts *opts);
2738 } backend_table[] = {
2739 { .name = "null", .open = qemu_chr_open_null },
2740 { .name = "socket", .open = qemu_chr_open_socket },
2741 { .name = "udp", .open = qemu_chr_open_udp },
2742 { .name = "msmouse", .open = qemu_chr_open_msmouse },
2743 { .name = "vc", .open = text_console_init },
2744 #ifdef _WIN32
2745 { .name = "file", .open = qemu_chr_open_win_file_out },
2746 { .name = "pipe", .open = qemu_chr_open_win_pipe },
2747 { .name = "console", .open = qemu_chr_open_win_con },
2748 { .name = "serial", .open = qemu_chr_open_win },
2749 { .name = "stdio", .open = qemu_chr_open_win_stdio },
2750 #else
2751 { .name = "file", .open = qemu_chr_open_file_out },
2752 { .name = "pipe", .open = qemu_chr_open_pipe },
2753 { .name = "pty", .open = qemu_chr_open_pty },
2754 { .name = "stdio", .open = qemu_chr_open_stdio },
2755 #endif
2756 #ifdef CONFIG_BRLAPI
2757 { .name = "braille", .open = chr_baum_init },
2758 #endif
2759 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2760 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
2761 || defined(__FreeBSD_kernel__)
2762 { .name = "tty", .open = qemu_chr_open_tty },
2763 #endif
2764 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
2765 || defined(__FreeBSD_kernel__)
2766 { .name = "parport", .open = qemu_chr_open_pp },
2767 #endif
2768 #ifdef CONFIG_SPICE
2769 { .name = "spicevmc", .open = qemu_chr_open_spice },
2770 #if SPICE_SERVER_VERSION >= 0x000c02
2771 { .name = "spiceport", .open = qemu_chr_open_spice_port },
2772 #endif
2773 #endif
2774 };
2775
2776 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
2777 void (*init)(struct CharDriverState *s))
2778 {
2779 CharDriverState *chr;
2780 int i;
2781
2782 if (qemu_opts_id(opts) == NULL) {
2783 fprintf(stderr, "chardev: no id specified\n");
2784 return NULL;
2785 }
2786
2787 if (qemu_opt_get(opts, "backend") == NULL) {
2788 fprintf(stderr, "chardev: \"%s\" missing backend\n",
2789 qemu_opts_id(opts));
2790 return NULL;
2791 }
2792 for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2793 if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2794 break;
2795 }
2796 if (i == ARRAY_SIZE(backend_table)) {
2797 fprintf(stderr, "chardev: backend \"%s\" not found\n",
2798 qemu_opt_get(opts, "backend"));
2799 return NULL;
2800 }
2801
2802 chr = backend_table[i].open(opts);
2803 if (!chr) {
2804 fprintf(stderr, "chardev: opening backend \"%s\" failed\n",
2805 qemu_opt_get(opts, "backend"));
2806 return NULL;
2807 }
2808
2809 if (!chr->filename)
2810 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
2811 chr->init = init;
2812 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2813
2814 if (qemu_opt_get_bool(opts, "mux", 0)) {
2815 CharDriverState *base = chr;
2816 int len = strlen(qemu_opts_id(opts)) + 6;
2817 base->label = g_malloc(len);
2818 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
2819 chr = qemu_chr_open_mux(base);
2820 chr->filename = base->filename;
2821 chr->avail_connections = MAX_MUX;
2822 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2823 } else {
2824 chr->avail_connections = 1;
2825 }
2826 chr->label = g_strdup(qemu_opts_id(opts));
2827 return chr;
2828 }
2829
2830 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2831 {
2832 const char *p;
2833 CharDriverState *chr;
2834 QemuOpts *opts;
2835
2836 if (strstart(filename, "chardev:", &p)) {
2837 return qemu_chr_find(p);
2838 }
2839
2840 opts = qemu_chr_parse_compat(label, filename);
2841 if (!opts)
2842 return NULL;
2843
2844 chr = qemu_chr_new_from_opts(opts, init);
2845 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
2846 monitor_init(chr, MONITOR_USE_READLINE);
2847 }
2848 qemu_opts_del(opts);
2849 return chr;
2850 }
2851
2852 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
2853 {
2854 if (chr->chr_set_echo) {
2855 chr->chr_set_echo(chr, echo);
2856 }
2857 }
2858
2859 void qemu_chr_fe_open(struct CharDriverState *chr)
2860 {
2861 if (chr->chr_guest_open) {
2862 chr->chr_guest_open(chr);
2863 }
2864 }
2865
2866 void qemu_chr_fe_close(struct CharDriverState *chr)
2867 {
2868 if (chr->chr_guest_close) {
2869 chr->chr_guest_close(chr);
2870 }
2871 }
2872
2873 void qemu_chr_delete(CharDriverState *chr)
2874 {
2875 QTAILQ_REMOVE(&chardevs, chr, next);
2876 if (chr->chr_close)
2877 chr->chr_close(chr);
2878 g_free(chr->filename);
2879 g_free(chr->label);
2880 g_free(chr);
2881 }
2882
2883 ChardevInfoList *qmp_query_chardev(Error **errp)
2884 {
2885 ChardevInfoList *chr_list = NULL;
2886 CharDriverState *chr;
2887
2888 QTAILQ_FOREACH(chr, &chardevs, next) {
2889 ChardevInfoList *info = g_malloc0(sizeof(*info));
2890 info->value = g_malloc0(sizeof(*info->value));
2891 info->value->label = g_strdup(chr->label);
2892 info->value->filename = g_strdup(chr->filename);
2893
2894 info->next = chr_list;
2895 chr_list = info;
2896 }
2897
2898 return chr_list;
2899 }
2900
2901 CharDriverState *qemu_chr_find(const char *name)
2902 {
2903 CharDriverState *chr;
2904
2905 QTAILQ_FOREACH(chr, &chardevs, next) {
2906 if (strcmp(chr->label, name) != 0)
2907 continue;
2908 return chr;
2909 }
2910 return NULL;
2911 }
2912
2913 /* Get a character (serial) device interface. */
2914 CharDriverState *qemu_char_get_next_serial(void)
2915 {
2916 static int next_serial;
2917
2918 /* FIXME: This function needs to go away: use chardev properties! */
2919 return serial_hds[next_serial++];
2920 }
2921
QEMU modified to work with kvm