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[qemu.git] / qemu-char.c
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu-common.h"
25 #include "monitor/monitor.h"
26 #include "ui/console.h"
27 #include "sysemu/sysemu.h"
28 #include "qemu/timer.h"
29 #include "sysemu/char.h"
30 #include "hw/usb.h"
31 #include "qmp-commands.h"
32
33 #include <unistd.h>
34 #include <fcntl.h>
35 #include <time.h>
36 #include <errno.h>
37 #include <sys/time.h>
38 #include <zlib.h>
39
40 #ifndef _WIN32
41 #include <sys/times.h>
42 #include <sys/wait.h>
43 #include <termios.h>
44 #include <sys/mman.h>
45 #include <sys/ioctl.h>
46 #include <sys/resource.h>
47 #include <sys/socket.h>
48 #include <netinet/in.h>
49 #include <net/if.h>
50 #include <arpa/inet.h>
51 #include <dirent.h>
52 #include <netdb.h>
53 #include <sys/select.h>
54 #ifdef CONFIG_BSD
55 #include <sys/stat.h>
56 #if defined(__GLIBC__)
57 #include <pty.h>
58 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
59 #include <libutil.h>
60 #else
61 #include <util.h>
62 #endif
63 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
64 #include <dev/ppbus/ppi.h>
65 #include <dev/ppbus/ppbconf.h>
66 #elif defined(__DragonFly__)
67 #include <dev/misc/ppi/ppi.h>
68 #include <bus/ppbus/ppbconf.h>
69 #endif
70 #else
71 #ifdef __linux__
72 #include <pty.h>
73
74 #include <linux/ppdev.h>
75 #include <linux/parport.h>
76 #endif
77 #ifdef __sun__
78 #include <sys/stat.h>
79 #include <sys/ethernet.h>
80 #include <sys/sockio.h>
81 #include <netinet/arp.h>
82 #include <netinet/in.h>
83 #include <netinet/in_systm.h>
84 #include <netinet/ip.h>
85 #include <netinet/ip_icmp.h> // must come after ip.h
86 #include <netinet/udp.h>
87 #include <netinet/tcp.h>
88 #include <net/if.h>
89 #include <syslog.h>
90 #include <stropts.h>
91 #endif
92 #endif
93 #endif
94
95 #include "qemu/sockets.h"
96 #include "ui/qemu-spice.h"
97
98 #define READ_BUF_LEN 4096
99
100 /***********************************************************/
101 /* character device */
102
103 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
104 QTAILQ_HEAD_INITIALIZER(chardevs);
105
106 void qemu_chr_be_event(CharDriverState *s, int event)
107 {
108 /* Keep track if the char device is open */
109 switch (event) {
110 case CHR_EVENT_OPENED:
111 s->be_open = 1;
112 break;
113 case CHR_EVENT_CLOSED:
114 s->be_open = 0;
115 break;
116 }
117
118 if (!s->chr_event)
119 return;
120 s->chr_event(s->handler_opaque, event);
121 }
122
123 static gboolean qemu_chr_be_generic_open_bh(gpointer opaque)
124 {
125 CharDriverState *s = opaque;
126 qemu_chr_be_event(s, CHR_EVENT_OPENED);
127 s->idle_tag = 0;
128 return FALSE;
129 }
130
131 void qemu_chr_be_generic_open(CharDriverState *s)
132 {
133 if (s->idle_tag == 0) {
134 s->idle_tag = g_idle_add(qemu_chr_be_generic_open_bh, s);
135 }
136 }
137
138 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
139 {
140 return s->chr_write(s, buf, len);
141 }
142
143 int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len)
144 {
145 int offset = 0;
146 int res;
147
148 while (offset < len) {
149 do {
150 res = s->chr_write(s, buf + offset, len - offset);
151 if (res == -1 && errno == EAGAIN) {
152 g_usleep(100);
153 }
154 } while (res == -1 && errno == EAGAIN);
155
156 if (res == 0) {
157 break;
158 }
159
160 if (res < 0) {
161 return res;
162 }
163
164 offset += res;
165 }
166
167 return offset;
168 }
169
170 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
171 {
172 if (!s->chr_ioctl)
173 return -ENOTSUP;
174 return s->chr_ioctl(s, cmd, arg);
175 }
176
177 int qemu_chr_be_can_write(CharDriverState *s)
178 {
179 if (!s->chr_can_read)
180 return 0;
181 return s->chr_can_read(s->handler_opaque);
182 }
183
184 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
185 {
186 if (s->chr_read) {
187 s->chr_read(s->handler_opaque, buf, len);
188 }
189 }
190
191 int qemu_chr_fe_get_msgfd(CharDriverState *s)
192 {
193 return s->get_msgfd ? s->get_msgfd(s) : -1;
194 }
195
196 int qemu_chr_add_client(CharDriverState *s, int fd)
197 {
198 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
199 }
200
201 void qemu_chr_accept_input(CharDriverState *s)
202 {
203 if (s->chr_accept_input)
204 s->chr_accept_input(s);
205 qemu_notify_event();
206 }
207
208 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
209 {
210 char buf[READ_BUF_LEN];
211 va_list ap;
212 va_start(ap, fmt);
213 vsnprintf(buf, sizeof(buf), fmt, ap);
214 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
215 va_end(ap);
216 }
217
218 void qemu_chr_add_handlers(CharDriverState *s,
219 IOCanReadHandler *fd_can_read,
220 IOReadHandler *fd_read,
221 IOEventHandler *fd_event,
222 void *opaque)
223 {
224 int fe_open;
225
226 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
227 fe_open = 0;
228 } else {
229 fe_open = 1;
230 }
231 s->chr_can_read = fd_can_read;
232 s->chr_read = fd_read;
233 s->chr_event = fd_event;
234 s->handler_opaque = opaque;
235 if (s->chr_update_read_handler)
236 s->chr_update_read_handler(s);
237
238 if (!s->explicit_fe_open) {
239 qemu_chr_fe_set_open(s, fe_open);
240 }
241
242 /* We're connecting to an already opened device, so let's make sure we
243 also get the open event */
244 if (fe_open && s->be_open) {
245 qemu_chr_be_generic_open(s);
246 }
247 }
248
249 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
250 {
251 return len;
252 }
253
254 static CharDriverState *qemu_chr_open_null(void)
255 {
256 CharDriverState *chr;
257
258 chr = g_malloc0(sizeof(CharDriverState));
259 chr->chr_write = null_chr_write;
260 return chr;
261 }
262
263 /* MUX driver for serial I/O splitting */
264 #define MAX_MUX 4
265 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
266 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
267 typedef struct {
268 IOCanReadHandler *chr_can_read[MAX_MUX];
269 IOReadHandler *chr_read[MAX_MUX];
270 IOEventHandler *chr_event[MAX_MUX];
271 void *ext_opaque[MAX_MUX];
272 CharDriverState *drv;
273 int focus;
274 int mux_cnt;
275 int term_got_escape;
276 int max_size;
277 /* Intermediate input buffer allows to catch escape sequences even if the
278 currently active device is not accepting any input - but only until it
279 is full as well. */
280 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
281 int prod[MAX_MUX];
282 int cons[MAX_MUX];
283 int timestamps;
284 int linestart;
285 int64_t timestamps_start;
286 } MuxDriver;
287
288
289 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
290 {
291 MuxDriver *d = chr->opaque;
292 int ret;
293 if (!d->timestamps) {
294 ret = d->drv->chr_write(d->drv, buf, len);
295 } else {
296 int i;
297
298 ret = 0;
299 for (i = 0; i < len; i++) {
300 if (d->linestart) {
301 char buf1[64];
302 int64_t ti;
303 int secs;
304
305 ti = qemu_get_clock_ms(rt_clock);
306 if (d->timestamps_start == -1)
307 d->timestamps_start = ti;
308 ti -= d->timestamps_start;
309 secs = ti / 1000;
310 snprintf(buf1, sizeof(buf1),
311 "[%02d:%02d:%02d.%03d] ",
312 secs / 3600,
313 (secs / 60) % 60,
314 secs % 60,
315 (int)(ti % 1000));
316 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
317 d->linestart = 0;
318 }
319 ret += d->drv->chr_write(d->drv, buf+i, 1);
320 if (buf[i] == '\n') {
321 d->linestart = 1;
322 }
323 }
324 }
325 return ret;
326 }
327
328 static const char * const mux_help[] = {
329 "% h print this help\n\r",
330 "% x exit emulator\n\r",
331 "% s save disk data back to file (if -snapshot)\n\r",
332 "% t toggle console timestamps\n\r"
333 "% b send break (magic sysrq)\n\r",
334 "% c switch between console and monitor\n\r",
335 "% % sends %\n\r",
336 NULL
337 };
338
339 int term_escape_char = 0x01; /* ctrl-a is used for escape */
340 static void mux_print_help(CharDriverState *chr)
341 {
342 int i, j;
343 char ebuf[15] = "Escape-Char";
344 char cbuf[50] = "\n\r";
345
346 if (term_escape_char > 0 && term_escape_char < 26) {
347 snprintf(cbuf, sizeof(cbuf), "\n\r");
348 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
349 } else {
350 snprintf(cbuf, sizeof(cbuf),
351 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
352 term_escape_char);
353 }
354 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
355 for (i = 0; mux_help[i] != NULL; i++) {
356 for (j=0; mux_help[i][j] != '\0'; j++) {
357 if (mux_help[i][j] == '%')
358 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
359 else
360 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
361 }
362 }
363 }
364
365 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
366 {
367 if (d->chr_event[mux_nr])
368 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
369 }
370
371 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
372 {
373 if (d->term_got_escape) {
374 d->term_got_escape = 0;
375 if (ch == term_escape_char)
376 goto send_char;
377 switch(ch) {
378 case '?':
379 case 'h':
380 mux_print_help(chr);
381 break;
382 case 'x':
383 {
384 const char *term = "QEMU: Terminated\n\r";
385 chr->chr_write(chr,(uint8_t *)term,strlen(term));
386 exit(0);
387 break;
388 }
389 case 's':
390 bdrv_commit_all();
391 break;
392 case 'b':
393 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
394 break;
395 case 'c':
396 /* Switch to the next registered device */
397 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
398 d->focus++;
399 if (d->focus >= d->mux_cnt)
400 d->focus = 0;
401 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
402 break;
403 case 't':
404 d->timestamps = !d->timestamps;
405 d->timestamps_start = -1;
406 d->linestart = 0;
407 break;
408 }
409 } else if (ch == term_escape_char) {
410 d->term_got_escape = 1;
411 } else {
412 send_char:
413 return 1;
414 }
415 return 0;
416 }
417
418 static void mux_chr_accept_input(CharDriverState *chr)
419 {
420 MuxDriver *d = chr->opaque;
421 int m = d->focus;
422
423 while (d->prod[m] != d->cons[m] &&
424 d->chr_can_read[m] &&
425 d->chr_can_read[m](d->ext_opaque[m])) {
426 d->chr_read[m](d->ext_opaque[m],
427 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
428 }
429 }
430
431 static int mux_chr_can_read(void *opaque)
432 {
433 CharDriverState *chr = opaque;
434 MuxDriver *d = chr->opaque;
435 int m = d->focus;
436
437 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
438 return 1;
439 if (d->chr_can_read[m])
440 return d->chr_can_read[m](d->ext_opaque[m]);
441 return 0;
442 }
443
444 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
445 {
446 CharDriverState *chr = opaque;
447 MuxDriver *d = chr->opaque;
448 int m = d->focus;
449 int i;
450
451 mux_chr_accept_input (opaque);
452
453 for(i = 0; i < size; i++)
454 if (mux_proc_byte(chr, d, buf[i])) {
455 if (d->prod[m] == d->cons[m] &&
456 d->chr_can_read[m] &&
457 d->chr_can_read[m](d->ext_opaque[m]))
458 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
459 else
460 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
461 }
462 }
463
464 static void mux_chr_event(void *opaque, int event)
465 {
466 CharDriverState *chr = opaque;
467 MuxDriver *d = chr->opaque;
468 int i;
469
470 /* Send the event to all registered listeners */
471 for (i = 0; i < d->mux_cnt; i++)
472 mux_chr_send_event(d, i, event);
473 }
474
475 static void mux_chr_update_read_handler(CharDriverState *chr)
476 {
477 MuxDriver *d = chr->opaque;
478
479 if (d->mux_cnt >= MAX_MUX) {
480 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
481 return;
482 }
483 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
484 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
485 d->chr_read[d->mux_cnt] = chr->chr_read;
486 d->chr_event[d->mux_cnt] = chr->chr_event;
487 /* Fix up the real driver with mux routines */
488 if (d->mux_cnt == 0) {
489 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
490 mux_chr_event, chr);
491 }
492 if (d->focus != -1) {
493 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
494 }
495 d->focus = d->mux_cnt;
496 d->mux_cnt++;
497 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
498 }
499
500 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
501 {
502 CharDriverState *chr;
503 MuxDriver *d;
504
505 chr = g_malloc0(sizeof(CharDriverState));
506 d = g_malloc0(sizeof(MuxDriver));
507
508 chr->opaque = d;
509 d->drv = drv;
510 d->focus = -1;
511 chr->chr_write = mux_chr_write;
512 chr->chr_update_read_handler = mux_chr_update_read_handler;
513 chr->chr_accept_input = mux_chr_accept_input;
514 /* Frontend guest-open / -close notification is not support with muxes */
515 chr->chr_set_fe_open = NULL;
516
517 /* Muxes are always open on creation */
518 qemu_chr_be_generic_open(chr);
519
520 return chr;
521 }
522
523
524 #ifdef _WIN32
525 int send_all(int fd, const void *buf, int len1)
526 {
527 int ret, len;
528
529 len = len1;
530 while (len > 0) {
531 ret = send(fd, buf, len, 0);
532 if (ret < 0) {
533 errno = WSAGetLastError();
534 if (errno != WSAEWOULDBLOCK) {
535 return -1;
536 }
537 } else if (ret == 0) {
538 break;
539 } else {
540 buf += ret;
541 len -= ret;
542 }
543 }
544 return len1 - len;
545 }
546
547 #else
548
549 int send_all(int fd, const void *_buf, int len1)
550 {
551 int ret, len;
552 const uint8_t *buf = _buf;
553
554 len = len1;
555 while (len > 0) {
556 ret = write(fd, buf, len);
557 if (ret < 0) {
558 if (errno != EINTR && errno != EAGAIN)
559 return -1;
560 } else if (ret == 0) {
561 break;
562 } else {
563 buf += ret;
564 len -= ret;
565 }
566 }
567 return len1 - len;
568 }
569
570 int recv_all(int fd, void *_buf, int len1, bool single_read)
571 {
572 int ret, len;
573 uint8_t *buf = _buf;
574
575 len = len1;
576 while ((len > 0) && (ret = read(fd, buf, len)) != 0) {
577 if (ret < 0) {
578 if (errno != EINTR && errno != EAGAIN) {
579 return -1;
580 }
581 continue;
582 } else {
583 if (single_read) {
584 return ret;
585 }
586 buf += ret;
587 len -= ret;
588 }
589 }
590 return len1 - len;
591 }
592
593 #endif /* !_WIN32 */
594
595 typedef struct IOWatchPoll
596 {
597 GSource parent;
598
599 GIOChannel *channel;
600 GSource *src;
601
602 IOCanReadHandler *fd_can_read;
603 GSourceFunc fd_read;
604 void *opaque;
605 } IOWatchPoll;
606
607 static IOWatchPoll *io_watch_poll_from_source(GSource *source)
608 {
609 return container_of(source, IOWatchPoll, parent);
610 }
611
612 static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_)
613 {
614 IOWatchPoll *iwp = io_watch_poll_from_source(source);
615 bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
616 bool was_active = iwp->src != NULL;
617 if (was_active == now_active) {
618 return FALSE;
619 }
620
621 if (now_active) {
622 iwp->src = g_io_create_watch(iwp->channel, G_IO_IN | G_IO_ERR | G_IO_HUP);
623 g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
624 g_source_attach(iwp->src, NULL);
625 } else {
626 g_source_destroy(iwp->src);
627 g_source_unref(iwp->src);
628 iwp->src = NULL;
629 }
630 return FALSE;
631 }
632
633 static gboolean io_watch_poll_check(GSource *source)
634 {
635 return FALSE;
636 }
637
638 static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
639 gpointer user_data)
640 {
641 abort();
642 }
643
644 static void io_watch_poll_finalize(GSource *source)
645 {
646 IOWatchPoll *iwp = io_watch_poll_from_source(source);
647 g_source_destroy(iwp->src);
648 g_source_unref(iwp->src);
649 iwp->src = NULL;
650 }
651
652 static GSourceFuncs io_watch_poll_funcs = {
653 .prepare = io_watch_poll_prepare,
654 .check = io_watch_poll_check,
655 .dispatch = io_watch_poll_dispatch,
656 .finalize = io_watch_poll_finalize,
657 };
658
659 /* Can only be used for read */
660 static guint io_add_watch_poll(GIOChannel *channel,
661 IOCanReadHandler *fd_can_read,
662 GIOFunc fd_read,
663 gpointer user_data)
664 {
665 IOWatchPoll *iwp;
666 int tag;
667
668 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll));
669 iwp->fd_can_read = fd_can_read;
670 iwp->opaque = user_data;
671 iwp->channel = channel;
672 iwp->fd_read = (GSourceFunc) fd_read;
673 iwp->src = NULL;
674
675 tag = g_source_attach(&iwp->parent, NULL);
676 g_source_unref(&iwp->parent);
677 return tag;
678 }
679
680 #ifndef _WIN32
681 static GIOChannel *io_channel_from_fd(int fd)
682 {
683 GIOChannel *chan;
684
685 if (fd == -1) {
686 return NULL;
687 }
688
689 chan = g_io_channel_unix_new(fd);
690
691 g_io_channel_set_encoding(chan, NULL, NULL);
692 g_io_channel_set_buffered(chan, FALSE);
693
694 return chan;
695 }
696 #endif
697
698 static GIOChannel *io_channel_from_socket(int fd)
699 {
700 GIOChannel *chan;
701
702 if (fd == -1) {
703 return NULL;
704 }
705
706 #ifdef _WIN32
707 chan = g_io_channel_win32_new_socket(fd);
708 #else
709 chan = g_io_channel_unix_new(fd);
710 #endif
711
712 g_io_channel_set_encoding(chan, NULL, NULL);
713 g_io_channel_set_buffered(chan, FALSE);
714
715 return chan;
716 }
717
718 static int io_channel_send(GIOChannel *fd, const void *buf, size_t len)
719 {
720 GIOStatus status;
721 size_t offset;
722
723 offset = 0;
724 while (offset < len) {
725 gsize bytes_written;
726
727 status = g_io_channel_write_chars(fd, buf + offset, len - offset,
728 &bytes_written, NULL);
729 if (status != G_IO_STATUS_NORMAL) {
730 if (status == G_IO_STATUS_AGAIN) {
731 /* If we've written any data, return a partial write. */
732 if (offset) {
733 break;
734 }
735 errno = EAGAIN;
736 } else {
737 errno = EINVAL;
738 }
739
740 return -1;
741 } else if (status == G_IO_STATUS_EOF) {
742 break;
743 }
744
745 offset += bytes_written;
746 }
747
748 return offset;
749 }
750
751 #ifndef _WIN32
752
753 typedef struct FDCharDriver {
754 CharDriverState *chr;
755 GIOChannel *fd_in, *fd_out;
756 guint fd_in_tag;
757 int max_size;
758 QTAILQ_ENTRY(FDCharDriver) node;
759 } FDCharDriver;
760
761 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
762 {
763 FDCharDriver *s = chr->opaque;
764
765 return io_channel_send(s->fd_out, buf, len);
766 }
767
768 static gboolean fd_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
769 {
770 CharDriverState *chr = opaque;
771 FDCharDriver *s = chr->opaque;
772 int len;
773 uint8_t buf[READ_BUF_LEN];
774 GIOStatus status;
775 gsize bytes_read;
776
777 len = sizeof(buf);
778 if (len > s->max_size) {
779 len = s->max_size;
780 }
781 if (len == 0) {
782 return FALSE;
783 }
784
785 status = g_io_channel_read_chars(chan, (gchar *)buf,
786 len, &bytes_read, NULL);
787 if (status == G_IO_STATUS_EOF) {
788 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
789 return FALSE;
790 }
791 if (status == G_IO_STATUS_NORMAL) {
792 qemu_chr_be_write(chr, buf, bytes_read);
793 }
794
795 return TRUE;
796 }
797
798 static int fd_chr_read_poll(void *opaque)
799 {
800 CharDriverState *chr = opaque;
801 FDCharDriver *s = chr->opaque;
802
803 s->max_size = qemu_chr_be_can_write(chr);
804 return s->max_size;
805 }
806
807 static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
808 {
809 FDCharDriver *s = chr->opaque;
810 return g_io_create_watch(s->fd_out, cond);
811 }
812
813 static void fd_chr_update_read_handler(CharDriverState *chr)
814 {
815 FDCharDriver *s = chr->opaque;
816
817 if (s->fd_in_tag) {
818 g_source_remove(s->fd_in_tag);
819 }
820
821 if (s->fd_in) {
822 s->fd_in_tag = io_add_watch_poll(s->fd_in, fd_chr_read_poll, fd_chr_read, chr);
823 }
824 }
825
826 static void fd_chr_close(struct CharDriverState *chr)
827 {
828 FDCharDriver *s = chr->opaque;
829
830 if (s->fd_in_tag) {
831 g_source_remove(s->fd_in_tag);
832 s->fd_in_tag = 0;
833 }
834
835 if (s->fd_in) {
836 g_io_channel_unref(s->fd_in);
837 }
838 if (s->fd_out) {
839 g_io_channel_unref(s->fd_out);
840 }
841
842 g_free(s);
843 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
844 }
845
846 /* open a character device to a unix fd */
847 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
848 {
849 CharDriverState *chr;
850 FDCharDriver *s;
851
852 chr = g_malloc0(sizeof(CharDriverState));
853 s = g_malloc0(sizeof(FDCharDriver));
854 s->fd_in = io_channel_from_fd(fd_in);
855 s->fd_out = io_channel_from_fd(fd_out);
856 fcntl(fd_out, F_SETFL, O_NONBLOCK);
857 s->chr = chr;
858 chr->opaque = s;
859 chr->chr_add_watch = fd_chr_add_watch;
860 chr->chr_write = fd_chr_write;
861 chr->chr_update_read_handler = fd_chr_update_read_handler;
862 chr->chr_close = fd_chr_close;
863
864 qemu_chr_be_generic_open(chr);
865
866 return chr;
867 }
868
869 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
870 {
871 int fd_in, fd_out;
872 char filename_in[256], filename_out[256];
873 const char *filename = opts->device;
874
875 if (filename == NULL) {
876 fprintf(stderr, "chardev: pipe: no filename given\n");
877 return NULL;
878 }
879
880 snprintf(filename_in, 256, "%s.in", filename);
881 snprintf(filename_out, 256, "%s.out", filename);
882 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
883 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
884 if (fd_in < 0 || fd_out < 0) {
885 if (fd_in >= 0)
886 close(fd_in);
887 if (fd_out >= 0)
888 close(fd_out);
889 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
890 if (fd_in < 0) {
891 return NULL;
892 }
893 }
894 return qemu_chr_open_fd(fd_in, fd_out);
895 }
896
897 /* init terminal so that we can grab keys */
898 static struct termios oldtty;
899 static int old_fd0_flags;
900 static bool stdio_allow_signal;
901
902 static void term_exit(void)
903 {
904 tcsetattr (0, TCSANOW, &oldtty);
905 fcntl(0, F_SETFL, old_fd0_flags);
906 }
907
908 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
909 {
910 struct termios tty;
911
912 tty = oldtty;
913 if (!echo) {
914 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
915 |INLCR|IGNCR|ICRNL|IXON);
916 tty.c_oflag |= OPOST;
917 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
918 tty.c_cflag &= ~(CSIZE|PARENB);
919 tty.c_cflag |= CS8;
920 tty.c_cc[VMIN] = 1;
921 tty.c_cc[VTIME] = 0;
922 }
923 /* if graphical mode, we allow Ctrl-C handling */
924 if (!stdio_allow_signal)
925 tty.c_lflag &= ~ISIG;
926
927 tcsetattr (0, TCSANOW, &tty);
928 }
929
930 static void qemu_chr_close_stdio(struct CharDriverState *chr)
931 {
932 term_exit();
933 fd_chr_close(chr);
934 }
935
936 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
937 {
938 CharDriverState *chr;
939
940 if (is_daemonized()) {
941 error_report("cannot use stdio with -daemonize");
942 return NULL;
943 }
944 old_fd0_flags = fcntl(0, F_GETFL);
945 tcgetattr (0, &oldtty);
946 fcntl(0, F_SETFL, O_NONBLOCK);
947 atexit(term_exit);
948
949 chr = qemu_chr_open_fd(0, 1);
950 chr->chr_close = qemu_chr_close_stdio;
951 chr->chr_set_echo = qemu_chr_set_echo_stdio;
952 stdio_allow_signal = display_type != DT_NOGRAPHIC;
953 if (opts->has_signal) {
954 stdio_allow_signal = opts->signal;
955 }
956 qemu_chr_fe_set_echo(chr, false);
957
958 return chr;
959 }
960
961 #ifdef __sun__
962 /* Once Solaris has openpty(), this is going to be removed. */
963 static int openpty(int *amaster, int *aslave, char *name,
964 struct termios *termp, struct winsize *winp)
965 {
966 const char *slave;
967 int mfd = -1, sfd = -1;
968
969 *amaster = *aslave = -1;
970
971 mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
972 if (mfd < 0)
973 goto err;
974
975 if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
976 goto err;
977
978 if ((slave = ptsname(mfd)) == NULL)
979 goto err;
980
981 if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
982 goto err;
983
984 if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
985 (termp != NULL && tcgetattr(sfd, termp) < 0))
986 goto err;
987
988 if (amaster)
989 *amaster = mfd;
990 if (aslave)
991 *aslave = sfd;
992 if (winp)
993 ioctl(sfd, TIOCSWINSZ, winp);
994
995 return 0;
996
997 err:
998 if (sfd != -1)
999 close(sfd);
1000 close(mfd);
1001 return -1;
1002 }
1003
1004 static void cfmakeraw (struct termios *termios_p)
1005 {
1006 termios_p->c_iflag &=
1007 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
1008 termios_p->c_oflag &= ~OPOST;
1009 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
1010 termios_p->c_cflag &= ~(CSIZE|PARENB);
1011 termios_p->c_cflag |= CS8;
1012
1013 termios_p->c_cc[VMIN] = 0;
1014 termios_p->c_cc[VTIME] = 0;
1015 }
1016 #endif
1017
1018 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1019 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
1020 || defined(__GLIBC__)
1021
1022 #define HAVE_CHARDEV_TTY 1
1023
1024 typedef struct {
1025 GIOChannel *fd;
1026 guint fd_tag;
1027 int connected;
1028 int polling;
1029 int read_bytes;
1030 guint timer_tag;
1031 } PtyCharDriver;
1032
1033 static void pty_chr_update_read_handler(CharDriverState *chr);
1034 static void pty_chr_state(CharDriverState *chr, int connected);
1035
1036 static gboolean pty_chr_timer(gpointer opaque)
1037 {
1038 struct CharDriverState *chr = opaque;
1039 PtyCharDriver *s = chr->opaque;
1040
1041 if (s->connected) {
1042 goto out;
1043 }
1044 if (s->polling) {
1045 /* If we arrive here without polling being cleared due
1046 * read returning -EIO, then we are (re-)connected */
1047 pty_chr_state(chr, 1);
1048 goto out;
1049 }
1050
1051 /* Next poll ... */
1052 pty_chr_update_read_handler(chr);
1053
1054 out:
1055 return FALSE;
1056 }
1057
1058 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1059 {
1060 PtyCharDriver *s = chr->opaque;
1061
1062 if (s->timer_tag) {
1063 g_source_remove(s->timer_tag);
1064 s->timer_tag = 0;
1065 }
1066
1067 if (ms == 1000) {
1068 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1069 } else {
1070 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1071 }
1072 }
1073
1074 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1075 {
1076 PtyCharDriver *s = chr->opaque;
1077
1078 if (!s->connected) {
1079 /* guest sends data, check for (re-)connect */
1080 pty_chr_update_read_handler(chr);
1081 return 0;
1082 }
1083 return io_channel_send(s->fd, buf, len);
1084 }
1085
1086 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1087 {
1088 PtyCharDriver *s = chr->opaque;
1089 return g_io_create_watch(s->fd, cond);
1090 }
1091
1092 static int pty_chr_read_poll(void *opaque)
1093 {
1094 CharDriverState *chr = opaque;
1095 PtyCharDriver *s = chr->opaque;
1096
1097 s->read_bytes = qemu_chr_be_can_write(chr);
1098 return s->read_bytes;
1099 }
1100
1101 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1102 {
1103 CharDriverState *chr = opaque;
1104 PtyCharDriver *s = chr->opaque;
1105 gsize size, len;
1106 uint8_t buf[READ_BUF_LEN];
1107 GIOStatus status;
1108
1109 len = sizeof(buf);
1110 if (len > s->read_bytes)
1111 len = s->read_bytes;
1112 if (len == 0)
1113 return FALSE;
1114 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1115 if (status != G_IO_STATUS_NORMAL) {
1116 pty_chr_state(chr, 0);
1117 return FALSE;
1118 } else {
1119 pty_chr_state(chr, 1);
1120 qemu_chr_be_write(chr, buf, size);
1121 }
1122 return TRUE;
1123 }
1124
1125 static void pty_chr_update_read_handler(CharDriverState *chr)
1126 {
1127 PtyCharDriver *s = chr->opaque;
1128
1129 if (s->fd_tag) {
1130 g_source_remove(s->fd_tag);
1131 }
1132
1133 s->fd_tag = io_add_watch_poll(s->fd, pty_chr_read_poll, pty_chr_read, chr);
1134 s->polling = 1;
1135 /*
1136 * Short timeout here: just need wait long enougth that qemu makes
1137 * it through the poll loop once. When reconnected we want a
1138 * short timeout so we notice it almost instantly. Otherwise
1139 * read() gives us -EIO instantly, making pty_chr_state() reset the
1140 * timeout to the normal (much longer) poll interval before the
1141 * timer triggers.
1142 */
1143 pty_chr_rearm_timer(chr, 10);
1144 }
1145
1146 static void pty_chr_state(CharDriverState *chr, int connected)
1147 {
1148 PtyCharDriver *s = chr->opaque;
1149
1150 if (!connected) {
1151 g_source_remove(s->fd_tag);
1152 s->fd_tag = 0;
1153 s->connected = 0;
1154 s->polling = 0;
1155 /* (re-)connect poll interval for idle guests: once per second.
1156 * We check more frequently in case the guests sends data to
1157 * the virtual device linked to our pty. */
1158 pty_chr_rearm_timer(chr, 1000);
1159 } else {
1160 if (!s->connected)
1161 qemu_chr_be_generic_open(chr);
1162 s->connected = 1;
1163 }
1164 }
1165
1166
1167 static void pty_chr_close(struct CharDriverState *chr)
1168 {
1169 PtyCharDriver *s = chr->opaque;
1170 int fd;
1171
1172 if (s->fd_tag) {
1173 g_source_remove(s->fd_tag);
1174 }
1175 fd = g_io_channel_unix_get_fd(s->fd);
1176 g_io_channel_unref(s->fd);
1177 close(fd);
1178 if (s->timer_tag) {
1179 g_source_remove(s->timer_tag);
1180 }
1181 g_free(s);
1182 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1183 }
1184
1185 static CharDriverState *qemu_chr_open_pty(const char *id,
1186 ChardevReturn *ret)
1187 {
1188 CharDriverState *chr;
1189 PtyCharDriver *s;
1190 struct termios tty;
1191 int master_fd, slave_fd;
1192 #if defined(__OpenBSD__) || defined(__DragonFly__)
1193 char pty_name[PATH_MAX];
1194 #define q_ptsname(x) pty_name
1195 #else
1196 char *pty_name = NULL;
1197 #define q_ptsname(x) ptsname(x)
1198 #endif
1199
1200 if (openpty(&master_fd, &slave_fd, pty_name, NULL, NULL) < 0) {
1201 return NULL;
1202 }
1203
1204 /* Set raw attributes on the pty. */
1205 tcgetattr(slave_fd, &tty);
1206 cfmakeraw(&tty);
1207 tcsetattr(slave_fd, TCSAFLUSH, &tty);
1208 close(slave_fd);
1209
1210 chr = g_malloc0(sizeof(CharDriverState));
1211
1212 chr->filename = g_strdup_printf("pty:%s", q_ptsname(master_fd));
1213 ret->pty = g_strdup(q_ptsname(master_fd));
1214 ret->has_pty = true;
1215
1216 fprintf(stderr, "char device redirected to %s (label %s)\n",
1217 q_ptsname(master_fd), id);
1218
1219 s = g_malloc0(sizeof(PtyCharDriver));
1220 chr->opaque = s;
1221 chr->chr_write = pty_chr_write;
1222 chr->chr_update_read_handler = pty_chr_update_read_handler;
1223 chr->chr_close = pty_chr_close;
1224 chr->chr_add_watch = pty_chr_add_watch;
1225
1226 s->fd = io_channel_from_fd(master_fd);
1227 s->timer_tag = 0;
1228
1229 return chr;
1230 }
1231
1232 static void tty_serial_init(int fd, int speed,
1233 int parity, int data_bits, int stop_bits)
1234 {
1235 struct termios tty;
1236 speed_t spd;
1237
1238 #if 0
1239 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1240 speed, parity, data_bits, stop_bits);
1241 #endif
1242 tcgetattr (fd, &tty);
1243
1244 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1245 speed = speed * 10 / 11;
1246 do {
1247 check_speed(50);
1248 check_speed(75);
1249 check_speed(110);
1250 check_speed(134);
1251 check_speed(150);
1252 check_speed(200);
1253 check_speed(300);
1254 check_speed(600);
1255 check_speed(1200);
1256 check_speed(1800);
1257 check_speed(2400);
1258 check_speed(4800);
1259 check_speed(9600);
1260 check_speed(19200);
1261 check_speed(38400);
1262 /* Non-Posix values follow. They may be unsupported on some systems. */
1263 check_speed(57600);
1264 check_speed(115200);
1265 #ifdef B230400
1266 check_speed(230400);
1267 #endif
1268 #ifdef B460800
1269 check_speed(460800);
1270 #endif
1271 #ifdef B500000
1272 check_speed(500000);
1273 #endif
1274 #ifdef B576000
1275 check_speed(576000);
1276 #endif
1277 #ifdef B921600
1278 check_speed(921600);
1279 #endif
1280 #ifdef B1000000
1281 check_speed(1000000);
1282 #endif
1283 #ifdef B1152000
1284 check_speed(1152000);
1285 #endif
1286 #ifdef B1500000
1287 check_speed(1500000);
1288 #endif
1289 #ifdef B2000000
1290 check_speed(2000000);
1291 #endif
1292 #ifdef B2500000
1293 check_speed(2500000);
1294 #endif
1295 #ifdef B3000000
1296 check_speed(3000000);
1297 #endif
1298 #ifdef B3500000
1299 check_speed(3500000);
1300 #endif
1301 #ifdef B4000000
1302 check_speed(4000000);
1303 #endif
1304 spd = B115200;
1305 } while (0);
1306
1307 cfsetispeed(&tty, spd);
1308 cfsetospeed(&tty, spd);
1309
1310 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1311 |INLCR|IGNCR|ICRNL|IXON);
1312 tty.c_oflag |= OPOST;
1313 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1314 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1315 switch(data_bits) {
1316 default:
1317 case 8:
1318 tty.c_cflag |= CS8;
1319 break;
1320 case 7:
1321 tty.c_cflag |= CS7;
1322 break;
1323 case 6:
1324 tty.c_cflag |= CS6;
1325 break;
1326 case 5:
1327 tty.c_cflag |= CS5;
1328 break;
1329 }
1330 switch(parity) {
1331 default:
1332 case 'N':
1333 break;
1334 case 'E':
1335 tty.c_cflag |= PARENB;
1336 break;
1337 case 'O':
1338 tty.c_cflag |= PARENB | PARODD;
1339 break;
1340 }
1341 if (stop_bits == 2)
1342 tty.c_cflag |= CSTOPB;
1343
1344 tcsetattr (fd, TCSANOW, &tty);
1345 }
1346
1347 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1348 {
1349 FDCharDriver *s = chr->opaque;
1350
1351 switch(cmd) {
1352 case CHR_IOCTL_SERIAL_SET_PARAMS:
1353 {
1354 QEMUSerialSetParams *ssp = arg;
1355 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1356 ssp->speed, ssp->parity,
1357 ssp->data_bits, ssp->stop_bits);
1358 }
1359 break;
1360 case CHR_IOCTL_SERIAL_SET_BREAK:
1361 {
1362 int enable = *(int *)arg;
1363 if (enable) {
1364 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1365 }
1366 }
1367 break;
1368 case CHR_IOCTL_SERIAL_GET_TIOCM:
1369 {
1370 int sarg = 0;
1371 int *targ = (int *)arg;
1372 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1373 *targ = 0;
1374 if (sarg & TIOCM_CTS)
1375 *targ |= CHR_TIOCM_CTS;
1376 if (sarg & TIOCM_CAR)
1377 *targ |= CHR_TIOCM_CAR;
1378 if (sarg & TIOCM_DSR)
1379 *targ |= CHR_TIOCM_DSR;
1380 if (sarg & TIOCM_RI)
1381 *targ |= CHR_TIOCM_RI;
1382 if (sarg & TIOCM_DTR)
1383 *targ |= CHR_TIOCM_DTR;
1384 if (sarg & TIOCM_RTS)
1385 *targ |= CHR_TIOCM_RTS;
1386 }
1387 break;
1388 case CHR_IOCTL_SERIAL_SET_TIOCM:
1389 {
1390 int sarg = *(int *)arg;
1391 int targ = 0;
1392 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1393 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1394 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1395 if (sarg & CHR_TIOCM_CTS)
1396 targ |= TIOCM_CTS;
1397 if (sarg & CHR_TIOCM_CAR)
1398 targ |= TIOCM_CAR;
1399 if (sarg & CHR_TIOCM_DSR)
1400 targ |= TIOCM_DSR;
1401 if (sarg & CHR_TIOCM_RI)
1402 targ |= TIOCM_RI;
1403 if (sarg & CHR_TIOCM_DTR)
1404 targ |= TIOCM_DTR;
1405 if (sarg & CHR_TIOCM_RTS)
1406 targ |= TIOCM_RTS;
1407 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1408 }
1409 break;
1410 default:
1411 return -ENOTSUP;
1412 }
1413 return 0;
1414 }
1415
1416 static void qemu_chr_close_tty(CharDriverState *chr)
1417 {
1418 FDCharDriver *s = chr->opaque;
1419 int fd = -1;
1420
1421 if (s) {
1422 fd = g_io_channel_unix_get_fd(s->fd_in);
1423 }
1424
1425 fd_chr_close(chr);
1426
1427 if (fd >= 0) {
1428 close(fd);
1429 }
1430 }
1431
1432 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1433 {
1434 CharDriverState *chr;
1435
1436 tty_serial_init(fd, 115200, 'N', 8, 1);
1437 chr = qemu_chr_open_fd(fd, fd);
1438 chr->chr_ioctl = tty_serial_ioctl;
1439 chr->chr_close = qemu_chr_close_tty;
1440 return chr;
1441 }
1442 #endif /* __linux__ || __sun__ */
1443
1444 #if defined(__linux__)
1445
1446 #define HAVE_CHARDEV_PARPORT 1
1447
1448 typedef struct {
1449 int fd;
1450 int mode;
1451 } ParallelCharDriver;
1452
1453 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1454 {
1455 if (s->mode != mode) {
1456 int m = mode;
1457 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1458 return 0;
1459 s->mode = mode;
1460 }
1461 return 1;
1462 }
1463
1464 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1465 {
1466 ParallelCharDriver *drv = chr->opaque;
1467 int fd = drv->fd;
1468 uint8_t b;
1469
1470 switch(cmd) {
1471 case CHR_IOCTL_PP_READ_DATA:
1472 if (ioctl(fd, PPRDATA, &b) < 0)
1473 return -ENOTSUP;
1474 *(uint8_t *)arg = b;
1475 break;
1476 case CHR_IOCTL_PP_WRITE_DATA:
1477 b = *(uint8_t *)arg;
1478 if (ioctl(fd, PPWDATA, &b) < 0)
1479 return -ENOTSUP;
1480 break;
1481 case CHR_IOCTL_PP_READ_CONTROL:
1482 if (ioctl(fd, PPRCONTROL, &b) < 0)
1483 return -ENOTSUP;
1484 /* Linux gives only the lowest bits, and no way to know data
1485 direction! For better compatibility set the fixed upper
1486 bits. */
1487 *(uint8_t *)arg = b | 0xc0;
1488 break;
1489 case CHR_IOCTL_PP_WRITE_CONTROL:
1490 b = *(uint8_t *)arg;
1491 if (ioctl(fd, PPWCONTROL, &b) < 0)
1492 return -ENOTSUP;
1493 break;
1494 case CHR_IOCTL_PP_READ_STATUS:
1495 if (ioctl(fd, PPRSTATUS, &b) < 0)
1496 return -ENOTSUP;
1497 *(uint8_t *)arg = b;
1498 break;
1499 case CHR_IOCTL_PP_DATA_DIR:
1500 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1501 return -ENOTSUP;
1502 break;
1503 case CHR_IOCTL_PP_EPP_READ_ADDR:
1504 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1505 struct ParallelIOArg *parg = arg;
1506 int n = read(fd, parg->buffer, parg->count);
1507 if (n != parg->count) {
1508 return -EIO;
1509 }
1510 }
1511 break;
1512 case CHR_IOCTL_PP_EPP_READ:
1513 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1514 struct ParallelIOArg *parg = arg;
1515 int n = read(fd, parg->buffer, parg->count);
1516 if (n != parg->count) {
1517 return -EIO;
1518 }
1519 }
1520 break;
1521 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1522 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1523 struct ParallelIOArg *parg = arg;
1524 int n = write(fd, parg->buffer, parg->count);
1525 if (n != parg->count) {
1526 return -EIO;
1527 }
1528 }
1529 break;
1530 case CHR_IOCTL_PP_EPP_WRITE:
1531 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1532 struct ParallelIOArg *parg = arg;
1533 int n = write(fd, parg->buffer, parg->count);
1534 if (n != parg->count) {
1535 return -EIO;
1536 }
1537 }
1538 break;
1539 default:
1540 return -ENOTSUP;
1541 }
1542 return 0;
1543 }
1544
1545 static void pp_close(CharDriverState *chr)
1546 {
1547 ParallelCharDriver *drv = chr->opaque;
1548 int fd = drv->fd;
1549
1550 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1551 ioctl(fd, PPRELEASE);
1552 close(fd);
1553 g_free(drv);
1554 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1555 }
1556
1557 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1558 {
1559 CharDriverState *chr;
1560 ParallelCharDriver *drv;
1561
1562 if (ioctl(fd, PPCLAIM) < 0) {
1563 close(fd);
1564 return NULL;
1565 }
1566
1567 drv = g_malloc0(sizeof(ParallelCharDriver));
1568 drv->fd = fd;
1569 drv->mode = IEEE1284_MODE_COMPAT;
1570
1571 chr = g_malloc0(sizeof(CharDriverState));
1572 chr->chr_write = null_chr_write;
1573 chr->chr_ioctl = pp_ioctl;
1574 chr->chr_close = pp_close;
1575 chr->opaque = drv;
1576
1577 qemu_chr_be_generic_open(chr);
1578
1579 return chr;
1580 }
1581 #endif /* __linux__ */
1582
1583 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1584
1585 #define HAVE_CHARDEV_PARPORT 1
1586
1587 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1588 {
1589 int fd = (int)(intptr_t)chr->opaque;
1590 uint8_t b;
1591
1592 switch(cmd) {
1593 case CHR_IOCTL_PP_READ_DATA:
1594 if (ioctl(fd, PPIGDATA, &b) < 0)
1595 return -ENOTSUP;
1596 *(uint8_t *)arg = b;
1597 break;
1598 case CHR_IOCTL_PP_WRITE_DATA:
1599 b = *(uint8_t *)arg;
1600 if (ioctl(fd, PPISDATA, &b) < 0)
1601 return -ENOTSUP;
1602 break;
1603 case CHR_IOCTL_PP_READ_CONTROL:
1604 if (ioctl(fd, PPIGCTRL, &b) < 0)
1605 return -ENOTSUP;
1606 *(uint8_t *)arg = b;
1607 break;
1608 case CHR_IOCTL_PP_WRITE_CONTROL:
1609 b = *(uint8_t *)arg;
1610 if (ioctl(fd, PPISCTRL, &b) < 0)
1611 return -ENOTSUP;
1612 break;
1613 case CHR_IOCTL_PP_READ_STATUS:
1614 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1615 return -ENOTSUP;
1616 *(uint8_t *)arg = b;
1617 break;
1618 default:
1619 return -ENOTSUP;
1620 }
1621 return 0;
1622 }
1623
1624 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1625 {
1626 CharDriverState *chr;
1627
1628 chr = g_malloc0(sizeof(CharDriverState));
1629 chr->opaque = (void *)(intptr_t)fd;
1630 chr->chr_write = null_chr_write;
1631 chr->chr_ioctl = pp_ioctl;
1632 return chr;
1633 }
1634 #endif
1635
1636 #else /* _WIN32 */
1637
1638 typedef struct {
1639 int max_size;
1640 HANDLE hcom, hrecv, hsend;
1641 OVERLAPPED orecv, osend;
1642 BOOL fpipe;
1643 DWORD len;
1644 } WinCharState;
1645
1646 typedef struct {
1647 HANDLE hStdIn;
1648 HANDLE hInputReadyEvent;
1649 HANDLE hInputDoneEvent;
1650 HANDLE hInputThread;
1651 uint8_t win_stdio_buf;
1652 } WinStdioCharState;
1653
1654 #define NSENDBUF 2048
1655 #define NRECVBUF 2048
1656 #define MAXCONNECT 1
1657 #define NTIMEOUT 5000
1658
1659 static int win_chr_poll(void *opaque);
1660 static int win_chr_pipe_poll(void *opaque);
1661
1662 static void win_chr_close(CharDriverState *chr)
1663 {
1664 WinCharState *s = chr->opaque;
1665
1666 if (s->hsend) {
1667 CloseHandle(s->hsend);
1668 s->hsend = NULL;
1669 }
1670 if (s->hrecv) {
1671 CloseHandle(s->hrecv);
1672 s->hrecv = NULL;
1673 }
1674 if (s->hcom) {
1675 CloseHandle(s->hcom);
1676 s->hcom = NULL;
1677 }
1678 if (s->fpipe)
1679 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1680 else
1681 qemu_del_polling_cb(win_chr_poll, chr);
1682
1683 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1684 }
1685
1686 static int win_chr_init(CharDriverState *chr, const char *filename)
1687 {
1688 WinCharState *s = chr->opaque;
1689 COMMCONFIG comcfg;
1690 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1691 COMSTAT comstat;
1692 DWORD size;
1693 DWORD err;
1694
1695 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1696 if (!s->hsend) {
1697 fprintf(stderr, "Failed CreateEvent\n");
1698 goto fail;
1699 }
1700 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1701 if (!s->hrecv) {
1702 fprintf(stderr, "Failed CreateEvent\n");
1703 goto fail;
1704 }
1705
1706 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1707 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1708 if (s->hcom == INVALID_HANDLE_VALUE) {
1709 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1710 s->hcom = NULL;
1711 goto fail;
1712 }
1713
1714 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1715 fprintf(stderr, "Failed SetupComm\n");
1716 goto fail;
1717 }
1718
1719 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1720 size = sizeof(COMMCONFIG);
1721 GetDefaultCommConfig(filename, &comcfg, &size);
1722 comcfg.dcb.DCBlength = sizeof(DCB);
1723 CommConfigDialog(filename, NULL, &comcfg);
1724
1725 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1726 fprintf(stderr, "Failed SetCommState\n");
1727 goto fail;
1728 }
1729
1730 if (!SetCommMask(s->hcom, EV_ERR)) {
1731 fprintf(stderr, "Failed SetCommMask\n");
1732 goto fail;
1733 }
1734
1735 cto.ReadIntervalTimeout = MAXDWORD;
1736 if (!SetCommTimeouts(s->hcom, &cto)) {
1737 fprintf(stderr, "Failed SetCommTimeouts\n");
1738 goto fail;
1739 }
1740
1741 if (!ClearCommError(s->hcom, &err, &comstat)) {
1742 fprintf(stderr, "Failed ClearCommError\n");
1743 goto fail;
1744 }
1745 qemu_add_polling_cb(win_chr_poll, chr);
1746 return 0;
1747
1748 fail:
1749 win_chr_close(chr);
1750 return -1;
1751 }
1752
1753 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1754 {
1755 WinCharState *s = chr->opaque;
1756 DWORD len, ret, size, err;
1757
1758 len = len1;
1759 ZeroMemory(&s->osend, sizeof(s->osend));
1760 s->osend.hEvent = s->hsend;
1761 while (len > 0) {
1762 if (s->hsend)
1763 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1764 else
1765 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1766 if (!ret) {
1767 err = GetLastError();
1768 if (err == ERROR_IO_PENDING) {
1769 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1770 if (ret) {
1771 buf += size;
1772 len -= size;
1773 } else {
1774 break;
1775 }
1776 } else {
1777 break;
1778 }
1779 } else {
1780 buf += size;
1781 len -= size;
1782 }
1783 }
1784 return len1 - len;
1785 }
1786
1787 static int win_chr_read_poll(CharDriverState *chr)
1788 {
1789 WinCharState *s = chr->opaque;
1790
1791 s->max_size = qemu_chr_be_can_write(chr);
1792 return s->max_size;
1793 }
1794
1795 static void win_chr_readfile(CharDriverState *chr)
1796 {
1797 WinCharState *s = chr->opaque;
1798 int ret, err;
1799 uint8_t buf[READ_BUF_LEN];
1800 DWORD size;
1801
1802 ZeroMemory(&s->orecv, sizeof(s->orecv));
1803 s->orecv.hEvent = s->hrecv;
1804 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1805 if (!ret) {
1806 err = GetLastError();
1807 if (err == ERROR_IO_PENDING) {
1808 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1809 }
1810 }
1811
1812 if (size > 0) {
1813 qemu_chr_be_write(chr, buf, size);
1814 }
1815 }
1816
1817 static void win_chr_read(CharDriverState *chr)
1818 {
1819 WinCharState *s = chr->opaque;
1820
1821 if (s->len > s->max_size)
1822 s->len = s->max_size;
1823 if (s->len == 0)
1824 return;
1825
1826 win_chr_readfile(chr);
1827 }
1828
1829 static int win_chr_poll(void *opaque)
1830 {
1831 CharDriverState *chr = opaque;
1832 WinCharState *s = chr->opaque;
1833 COMSTAT status;
1834 DWORD comerr;
1835
1836 ClearCommError(s->hcom, &comerr, &status);
1837 if (status.cbInQue > 0) {
1838 s->len = status.cbInQue;
1839 win_chr_read_poll(chr);
1840 win_chr_read(chr);
1841 return 1;
1842 }
1843 return 0;
1844 }
1845
1846 static CharDriverState *qemu_chr_open_win_path(const char *filename)
1847 {
1848 CharDriverState *chr;
1849 WinCharState *s;
1850
1851 chr = g_malloc0(sizeof(CharDriverState));
1852 s = g_malloc0(sizeof(WinCharState));
1853 chr->opaque = s;
1854 chr->chr_write = win_chr_write;
1855 chr->chr_close = win_chr_close;
1856
1857 if (win_chr_init(chr, filename) < 0) {
1858 g_free(s);
1859 g_free(chr);
1860 return NULL;
1861 }
1862 qemu_chr_be_generic_open(chr);
1863 return chr;
1864 }
1865
1866 static int win_chr_pipe_poll(void *opaque)
1867 {
1868 CharDriverState *chr = opaque;
1869 WinCharState *s = chr->opaque;
1870 DWORD size;
1871
1872 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1873 if (size > 0) {
1874 s->len = size;
1875 win_chr_read_poll(chr);
1876 win_chr_read(chr);
1877 return 1;
1878 }
1879 return 0;
1880 }
1881
1882 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1883 {
1884 WinCharState *s = chr->opaque;
1885 OVERLAPPED ov;
1886 int ret;
1887 DWORD size;
1888 char openname[256];
1889
1890 s->fpipe = TRUE;
1891
1892 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1893 if (!s->hsend) {
1894 fprintf(stderr, "Failed CreateEvent\n");
1895 goto fail;
1896 }
1897 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1898 if (!s->hrecv) {
1899 fprintf(stderr, "Failed CreateEvent\n");
1900 goto fail;
1901 }
1902
1903 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1904 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1905 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1906 PIPE_WAIT,
1907 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1908 if (s->hcom == INVALID_HANDLE_VALUE) {
1909 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1910 s->hcom = NULL;
1911 goto fail;
1912 }
1913
1914 ZeroMemory(&ov, sizeof(ov));
1915 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1916 ret = ConnectNamedPipe(s->hcom, &ov);
1917 if (ret) {
1918 fprintf(stderr, "Failed ConnectNamedPipe\n");
1919 goto fail;
1920 }
1921
1922 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1923 if (!ret) {
1924 fprintf(stderr, "Failed GetOverlappedResult\n");
1925 if (ov.hEvent) {
1926 CloseHandle(ov.hEvent);
1927 ov.hEvent = NULL;
1928 }
1929 goto fail;
1930 }
1931
1932 if (ov.hEvent) {
1933 CloseHandle(ov.hEvent);
1934 ov.hEvent = NULL;
1935 }
1936 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1937 return 0;
1938
1939 fail:
1940 win_chr_close(chr);
1941 return -1;
1942 }
1943
1944
1945 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
1946 {
1947 const char *filename = opts->device;
1948 CharDriverState *chr;
1949 WinCharState *s;
1950
1951 chr = g_malloc0(sizeof(CharDriverState));
1952 s = g_malloc0(sizeof(WinCharState));
1953 chr->opaque = s;
1954 chr->chr_write = win_chr_write;
1955 chr->chr_close = win_chr_close;
1956
1957 if (win_chr_pipe_init(chr, filename) < 0) {
1958 g_free(s);
1959 g_free(chr);
1960 return NULL;
1961 }
1962 qemu_chr_be_generic_open(chr);
1963 return chr;
1964 }
1965
1966 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1967 {
1968 CharDriverState *chr;
1969 WinCharState *s;
1970
1971 chr = g_malloc0(sizeof(CharDriverState));
1972 s = g_malloc0(sizeof(WinCharState));
1973 s->hcom = fd_out;
1974 chr->opaque = s;
1975 chr->chr_write = win_chr_write;
1976 qemu_chr_be_generic_open(chr);
1977 return chr;
1978 }
1979
1980 static CharDriverState *qemu_chr_open_win_con(void)
1981 {
1982 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1983 }
1984
1985 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1986 {
1987 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1988 DWORD dwSize;
1989 int len1;
1990
1991 len1 = len;
1992
1993 while (len1 > 0) {
1994 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1995 break;
1996 }
1997 buf += dwSize;
1998 len1 -= dwSize;
1999 }
2000
2001 return len - len1;
2002 }
2003
2004 static void win_stdio_wait_func(void *opaque)
2005 {
2006 CharDriverState *chr = opaque;
2007 WinStdioCharState *stdio = chr->opaque;
2008 INPUT_RECORD buf[4];
2009 int ret;
2010 DWORD dwSize;
2011 int i;
2012
2013 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
2014 &dwSize);
2015
2016 if (!ret) {
2017 /* Avoid error storm */
2018 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2019 return;
2020 }
2021
2022 for (i = 0; i < dwSize; i++) {
2023 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2024
2025 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2026 int j;
2027 if (kev->uChar.AsciiChar != 0) {
2028 for (j = 0; j < kev->wRepeatCount; j++) {
2029 if (qemu_chr_be_can_write(chr)) {
2030 uint8_t c = kev->uChar.AsciiChar;
2031 qemu_chr_be_write(chr, &c, 1);
2032 }
2033 }
2034 }
2035 }
2036 }
2037 }
2038
2039 static DWORD WINAPI win_stdio_thread(LPVOID param)
2040 {
2041 CharDriverState *chr = param;
2042 WinStdioCharState *stdio = chr->opaque;
2043 int ret;
2044 DWORD dwSize;
2045
2046 while (1) {
2047
2048 /* Wait for one byte */
2049 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2050
2051 /* Exit in case of error, continue if nothing read */
2052 if (!ret) {
2053 break;
2054 }
2055 if (!dwSize) {
2056 continue;
2057 }
2058
2059 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2060 if (stdio->win_stdio_buf == '\r') {
2061 continue;
2062 }
2063
2064 /* Signal the main thread and wait until the byte was eaten */
2065 if (!SetEvent(stdio->hInputReadyEvent)) {
2066 break;
2067 }
2068 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2069 != WAIT_OBJECT_0) {
2070 break;
2071 }
2072 }
2073
2074 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2075 return 0;
2076 }
2077
2078 static void win_stdio_thread_wait_func(void *opaque)
2079 {
2080 CharDriverState *chr = opaque;
2081 WinStdioCharState *stdio = chr->opaque;
2082
2083 if (qemu_chr_be_can_write(chr)) {
2084 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2085 }
2086
2087 SetEvent(stdio->hInputDoneEvent);
2088 }
2089
2090 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2091 {
2092 WinStdioCharState *stdio = chr->opaque;
2093 DWORD dwMode = 0;
2094
2095 GetConsoleMode(stdio->hStdIn, &dwMode);
2096
2097 if (echo) {
2098 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2099 } else {
2100 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2101 }
2102 }
2103
2104 static void win_stdio_close(CharDriverState *chr)
2105 {
2106 WinStdioCharState *stdio = chr->opaque;
2107
2108 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2109 CloseHandle(stdio->hInputReadyEvent);
2110 }
2111 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2112 CloseHandle(stdio->hInputDoneEvent);
2113 }
2114 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2115 TerminateThread(stdio->hInputThread, 0);
2116 }
2117
2118 g_free(chr->opaque);
2119 g_free(chr);
2120 }
2121
2122 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
2123 {
2124 CharDriverState *chr;
2125 WinStdioCharState *stdio;
2126 DWORD dwMode;
2127 int is_console = 0;
2128
2129 chr = g_malloc0(sizeof(CharDriverState));
2130 stdio = g_malloc0(sizeof(WinStdioCharState));
2131
2132 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2133 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2134 fprintf(stderr, "cannot open stdio: invalid handle\n");
2135 exit(1);
2136 }
2137
2138 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2139
2140 chr->opaque = stdio;
2141 chr->chr_write = win_stdio_write;
2142 chr->chr_close = win_stdio_close;
2143
2144 if (is_console) {
2145 if (qemu_add_wait_object(stdio->hStdIn,
2146 win_stdio_wait_func, chr)) {
2147 fprintf(stderr, "qemu_add_wait_object: failed\n");
2148 }
2149 } else {
2150 DWORD dwId;
2151
2152 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2153 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2154 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2155 chr, 0, &dwId);
2156
2157 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2158 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2159 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2160 fprintf(stderr, "cannot create stdio thread or event\n");
2161 exit(1);
2162 }
2163 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2164 win_stdio_thread_wait_func, chr)) {
2165 fprintf(stderr, "qemu_add_wait_object: failed\n");
2166 }
2167 }
2168
2169 dwMode |= ENABLE_LINE_INPUT;
2170
2171 if (is_console) {
2172 /* set the terminal in raw mode */
2173 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2174 dwMode |= ENABLE_PROCESSED_INPUT;
2175 }
2176
2177 SetConsoleMode(stdio->hStdIn, dwMode);
2178
2179 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2180 qemu_chr_fe_set_echo(chr, false);
2181
2182 return chr;
2183 }
2184 #endif /* !_WIN32 */
2185
2186
2187 /***********************************************************/
2188 /* UDP Net console */
2189
2190 typedef struct {
2191 int fd;
2192 GIOChannel *chan;
2193 guint tag;
2194 uint8_t buf[READ_BUF_LEN];
2195 int bufcnt;
2196 int bufptr;
2197 int max_size;
2198 } NetCharDriver;
2199
2200 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2201 {
2202 NetCharDriver *s = chr->opaque;
2203 gsize bytes_written;
2204 GIOStatus status;
2205
2206 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2207 if (status == G_IO_STATUS_EOF) {
2208 return 0;
2209 } else if (status != G_IO_STATUS_NORMAL) {
2210 return -1;
2211 }
2212
2213 return bytes_written;
2214 }
2215
2216 static int udp_chr_read_poll(void *opaque)
2217 {
2218 CharDriverState *chr = opaque;
2219 NetCharDriver *s = chr->opaque;
2220
2221 s->max_size = qemu_chr_be_can_write(chr);
2222
2223 /* If there were any stray characters in the queue process them
2224 * first
2225 */
2226 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2227 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2228 s->bufptr++;
2229 s->max_size = qemu_chr_be_can_write(chr);
2230 }
2231 return s->max_size;
2232 }
2233
2234 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2235 {
2236 CharDriverState *chr = opaque;
2237 NetCharDriver *s = chr->opaque;
2238 gsize bytes_read = 0;
2239 GIOStatus status;
2240
2241 if (s->max_size == 0)
2242 return FALSE;
2243 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2244 &bytes_read, NULL);
2245 s->bufcnt = bytes_read;
2246 s->bufptr = s->bufcnt;
2247 if (status != G_IO_STATUS_NORMAL) {
2248 return FALSE;
2249 }
2250
2251 s->bufptr = 0;
2252 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2253 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2254 s->bufptr++;
2255 s->max_size = qemu_chr_be_can_write(chr);
2256 }
2257
2258 return TRUE;
2259 }
2260
2261 static void udp_chr_update_read_handler(CharDriverState *chr)
2262 {
2263 NetCharDriver *s = chr->opaque;
2264
2265 if (s->tag) {
2266 g_source_remove(s->tag);
2267 s->tag = 0;
2268 }
2269
2270 if (s->chan) {
2271 s->tag = io_add_watch_poll(s->chan, udp_chr_read_poll, udp_chr_read, chr);
2272 }
2273 }
2274
2275 static void udp_chr_close(CharDriverState *chr)
2276 {
2277 NetCharDriver *s = chr->opaque;
2278 if (s->tag) {
2279 g_source_remove(s->tag);
2280 }
2281 if (s->chan) {
2282 g_io_channel_unref(s->chan);
2283 closesocket(s->fd);
2284 }
2285 g_free(s);
2286 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2287 }
2288
2289 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2290 {
2291 CharDriverState *chr = NULL;
2292 NetCharDriver *s = NULL;
2293
2294 chr = g_malloc0(sizeof(CharDriverState));
2295 s = g_malloc0(sizeof(NetCharDriver));
2296
2297 s->fd = fd;
2298 s->chan = io_channel_from_socket(s->fd);
2299 s->bufcnt = 0;
2300 s->bufptr = 0;
2301 chr->opaque = s;
2302 chr->chr_write = udp_chr_write;
2303 chr->chr_update_read_handler = udp_chr_update_read_handler;
2304 chr->chr_close = udp_chr_close;
2305 return chr;
2306 }
2307
2308 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2309 {
2310 Error *local_err = NULL;
2311 int fd = -1;
2312
2313 fd = inet_dgram_opts(opts, &local_err);
2314 if (fd < 0) {
2315 return NULL;
2316 }
2317 return qemu_chr_open_udp_fd(fd);
2318 }
2319
2320 /***********************************************************/
2321 /* TCP Net console */
2322
2323 typedef struct {
2324
2325 GIOChannel *chan, *listen_chan;
2326 guint tag, listen_tag;
2327 int fd, listen_fd;
2328 int connected;
2329 int max_size;
2330 int do_telnetopt;
2331 int do_nodelay;
2332 int is_unix;
2333 int msgfd;
2334 } TCPCharDriver;
2335
2336 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2337
2338 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2339 {
2340 TCPCharDriver *s = chr->opaque;
2341 if (s->connected) {
2342 return io_channel_send(s->chan, buf, len);
2343 } else {
2344 /* XXX: indicate an error ? */
2345 return len;
2346 }
2347 }
2348
2349 static int tcp_chr_read_poll(void *opaque)
2350 {
2351 CharDriverState *chr = opaque;
2352 TCPCharDriver *s = chr->opaque;
2353 if (!s->connected)
2354 return 0;
2355 s->max_size = qemu_chr_be_can_write(chr);
2356 return s->max_size;
2357 }
2358
2359 #define IAC 255
2360 #define IAC_BREAK 243
2361 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2362 TCPCharDriver *s,
2363 uint8_t *buf, int *size)
2364 {
2365 /* Handle any telnet client's basic IAC options to satisfy char by
2366 * char mode with no echo. All IAC options will be removed from
2367 * the buf and the do_telnetopt variable will be used to track the
2368 * state of the width of the IAC information.
2369 *
2370 * IAC commands come in sets of 3 bytes with the exception of the
2371 * "IAC BREAK" command and the double IAC.
2372 */
2373
2374 int i;
2375 int j = 0;
2376
2377 for (i = 0; i < *size; i++) {
2378 if (s->do_telnetopt > 1) {
2379 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2380 /* Double IAC means send an IAC */
2381 if (j != i)
2382 buf[j] = buf[i];
2383 j++;
2384 s->do_telnetopt = 1;
2385 } else {
2386 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2387 /* Handle IAC break commands by sending a serial break */
2388 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2389 s->do_telnetopt++;
2390 }
2391 s->do_telnetopt++;
2392 }
2393 if (s->do_telnetopt >= 4) {
2394 s->do_telnetopt = 1;
2395 }
2396 } else {
2397 if ((unsigned char)buf[i] == IAC) {
2398 s->do_telnetopt = 2;
2399 } else {
2400 if (j != i)
2401 buf[j] = buf[i];
2402 j++;
2403 }
2404 }
2405 }
2406 *size = j;
2407 }
2408
2409 static int tcp_get_msgfd(CharDriverState *chr)
2410 {
2411 TCPCharDriver *s = chr->opaque;
2412 int fd = s->msgfd;
2413 s->msgfd = -1;
2414 return fd;
2415 }
2416
2417 #ifndef _WIN32
2418 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2419 {
2420 TCPCharDriver *s = chr->opaque;
2421 struct cmsghdr *cmsg;
2422
2423 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2424 int fd;
2425
2426 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2427 cmsg->cmsg_level != SOL_SOCKET ||
2428 cmsg->cmsg_type != SCM_RIGHTS)
2429 continue;
2430
2431 fd = *((int *)CMSG_DATA(cmsg));
2432 if (fd < 0)
2433 continue;
2434
2435 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2436 qemu_set_block(fd);
2437
2438 #ifndef MSG_CMSG_CLOEXEC
2439 qemu_set_cloexec(fd);
2440 #endif
2441 if (s->msgfd != -1)
2442 close(s->msgfd);
2443 s->msgfd = fd;
2444 }
2445 }
2446
2447 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2448 {
2449 TCPCharDriver *s = chr->opaque;
2450 struct msghdr msg = { NULL, };
2451 struct iovec iov[1];
2452 union {
2453 struct cmsghdr cmsg;
2454 char control[CMSG_SPACE(sizeof(int))];
2455 } msg_control;
2456 int flags = 0;
2457 ssize_t ret;
2458
2459 iov[0].iov_base = buf;
2460 iov[0].iov_len = len;
2461
2462 msg.msg_iov = iov;
2463 msg.msg_iovlen = 1;
2464 msg.msg_control = &msg_control;
2465 msg.msg_controllen = sizeof(msg_control);
2466
2467 #ifdef MSG_CMSG_CLOEXEC
2468 flags |= MSG_CMSG_CLOEXEC;
2469 #endif
2470 ret = recvmsg(s->fd, &msg, flags);
2471 if (ret > 0 && s->is_unix) {
2472 unix_process_msgfd(chr, &msg);
2473 }
2474
2475 return ret;
2476 }
2477 #else
2478 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2479 {
2480 TCPCharDriver *s = chr->opaque;
2481 return qemu_recv(s->fd, buf, len, 0);
2482 }
2483 #endif
2484
2485 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2486 {
2487 TCPCharDriver *s = chr->opaque;
2488 return g_io_create_watch(s->chan, cond);
2489 }
2490
2491 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2492 {
2493 CharDriverState *chr = opaque;
2494 TCPCharDriver *s = chr->opaque;
2495 uint8_t buf[READ_BUF_LEN];
2496 int len, size;
2497
2498 if (!s->connected || s->max_size <= 0) {
2499 return FALSE;
2500 }
2501 len = sizeof(buf);
2502 if (len > s->max_size)
2503 len = s->max_size;
2504 size = tcp_chr_recv(chr, (void *)buf, len);
2505 if (size == 0) {
2506 /* connection closed */
2507 s->connected = 0;
2508 if (s->listen_chan) {
2509 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2510 }
2511 g_source_remove(s->tag);
2512 s->tag = 0;
2513 g_io_channel_unref(s->chan);
2514 s->chan = NULL;
2515 closesocket(s->fd);
2516 s->fd = -1;
2517 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2518 } else if (size > 0) {
2519 if (s->do_telnetopt)
2520 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2521 if (size > 0)
2522 qemu_chr_be_write(chr, buf, size);
2523 }
2524
2525 return TRUE;
2526 }
2527
2528 #ifndef _WIN32
2529 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2530 {
2531 return qemu_chr_open_fd(eventfd, eventfd);
2532 }
2533 #endif
2534
2535 static void tcp_chr_connect(void *opaque)
2536 {
2537 CharDriverState *chr = opaque;
2538 TCPCharDriver *s = chr->opaque;
2539
2540 s->connected = 1;
2541 if (s->chan) {
2542 s->tag = io_add_watch_poll(s->chan, tcp_chr_read_poll, tcp_chr_read, chr);
2543 }
2544 qemu_chr_be_generic_open(chr);
2545 }
2546
2547 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2548 static void tcp_chr_telnet_init(int fd)
2549 {
2550 char buf[3];
2551 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2552 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2553 send(fd, (char *)buf, 3, 0);
2554 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2555 send(fd, (char *)buf, 3, 0);
2556 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2557 send(fd, (char *)buf, 3, 0);
2558 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2559 send(fd, (char *)buf, 3, 0);
2560 }
2561
2562 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2563 {
2564 TCPCharDriver *s = chr->opaque;
2565 if (s->fd != -1)
2566 return -1;
2567
2568 qemu_set_nonblock(fd);
2569 if (s->do_nodelay)
2570 socket_set_nodelay(fd);
2571 s->fd = fd;
2572 s->chan = io_channel_from_socket(fd);
2573 g_source_remove(s->listen_tag);
2574 s->listen_tag = 0;
2575 tcp_chr_connect(chr);
2576
2577 return 0;
2578 }
2579
2580 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
2581 {
2582 CharDriverState *chr = opaque;
2583 TCPCharDriver *s = chr->opaque;
2584 struct sockaddr_in saddr;
2585 #ifndef _WIN32
2586 struct sockaddr_un uaddr;
2587 #endif
2588 struct sockaddr *addr;
2589 socklen_t len;
2590 int fd;
2591
2592 for(;;) {
2593 #ifndef _WIN32
2594 if (s->is_unix) {
2595 len = sizeof(uaddr);
2596 addr = (struct sockaddr *)&uaddr;
2597 } else
2598 #endif
2599 {
2600 len = sizeof(saddr);
2601 addr = (struct sockaddr *)&saddr;
2602 }
2603 fd = qemu_accept(s->listen_fd, addr, &len);
2604 if (fd < 0 && errno != EINTR) {
2605 return FALSE;
2606 } else if (fd >= 0) {
2607 if (s->do_telnetopt)
2608 tcp_chr_telnet_init(fd);
2609 break;
2610 }
2611 }
2612 if (tcp_chr_add_client(chr, fd) < 0)
2613 close(fd);
2614
2615 return TRUE;
2616 }
2617
2618 static void tcp_chr_close(CharDriverState *chr)
2619 {
2620 TCPCharDriver *s = chr->opaque;
2621 if (s->fd >= 0) {
2622 if (s->tag) {
2623 g_source_remove(s->tag);
2624 }
2625 if (s->chan) {
2626 g_io_channel_unref(s->chan);
2627 }
2628 closesocket(s->fd);
2629 }
2630 if (s->listen_fd >= 0) {
2631 if (s->listen_tag) {
2632 g_source_remove(s->listen_tag);
2633 }
2634 if (s->listen_chan) {
2635 g_io_channel_unref(s->listen_chan);
2636 }
2637 closesocket(s->listen_fd);
2638 }
2639 g_free(s);
2640 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2641 }
2642
2643 static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
2644 bool is_listen, bool is_telnet,
2645 bool is_waitconnect,
2646 Error **errp)
2647 {
2648 CharDriverState *chr = NULL;
2649 TCPCharDriver *s = NULL;
2650 char host[NI_MAXHOST], serv[NI_MAXSERV];
2651 const char *left = "", *right = "";
2652 struct sockaddr_storage ss;
2653 socklen_t ss_len = sizeof(ss);
2654
2655 memset(&ss, 0, ss_len);
2656 if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2657 error_setg(errp, "getsockname: %s", strerror(errno));
2658 return NULL;
2659 }
2660
2661 chr = g_malloc0(sizeof(CharDriverState));
2662 s = g_malloc0(sizeof(TCPCharDriver));
2663
2664 s->connected = 0;
2665 s->fd = -1;
2666 s->listen_fd = -1;
2667 s->msgfd = -1;
2668
2669 chr->filename = g_malloc(256);
2670 switch (ss.ss_family) {
2671 #ifndef _WIN32
2672 case AF_UNIX:
2673 s->is_unix = 1;
2674 snprintf(chr->filename, 256, "unix:%s%s",
2675 ((struct sockaddr_un *)(&ss))->sun_path,
2676 is_listen ? ",server" : "");
2677 break;
2678 #endif
2679 case AF_INET6:
2680 left = "[";
2681 right = "]";
2682 /* fall through */
2683 case AF_INET:
2684 s->do_nodelay = do_nodelay;
2685 getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
2686 serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
2687 snprintf(chr->filename, 256, "%s:%s%s%s:%s%s",
2688 is_telnet ? "telnet" : "tcp",
2689 left, host, right, serv,
2690 is_listen ? ",server" : "");
2691 break;
2692 }
2693
2694 chr->opaque = s;
2695 chr->chr_write = tcp_chr_write;
2696 chr->chr_close = tcp_chr_close;
2697 chr->get_msgfd = tcp_get_msgfd;
2698 chr->chr_add_client = tcp_chr_add_client;
2699 chr->chr_add_watch = tcp_chr_add_watch;
2700
2701 if (is_listen) {
2702 s->listen_fd = fd;
2703 s->listen_chan = io_channel_from_socket(s->listen_fd);
2704 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2705 if (is_telnet) {
2706 s->do_telnetopt = 1;
2707 }
2708 } else {
2709 s->connected = 1;
2710 s->fd = fd;
2711 socket_set_nodelay(fd);
2712 s->chan = io_channel_from_socket(s->fd);
2713 tcp_chr_connect(chr);
2714 }
2715
2716 if (is_listen && is_waitconnect) {
2717 printf("QEMU waiting for connection on: %s\n",
2718 chr->filename);
2719 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
2720 qemu_set_nonblock(s->listen_fd);
2721 }
2722 return chr;
2723 }
2724
2725 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2726 {
2727 CharDriverState *chr = NULL;
2728 Error *local_err = NULL;
2729 int fd = -1;
2730 int is_listen;
2731 int is_waitconnect;
2732 int do_nodelay;
2733 int is_unix;
2734 int is_telnet;
2735
2736 is_listen = qemu_opt_get_bool(opts, "server", 0);
2737 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2738 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2739 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2740 is_unix = qemu_opt_get(opts, "path") != NULL;
2741 if (!is_listen)
2742 is_waitconnect = 0;
2743
2744 if (is_unix) {
2745 if (is_listen) {
2746 fd = unix_listen_opts(opts, &local_err);
2747 } else {
2748 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
2749 }
2750 } else {
2751 if (is_listen) {
2752 fd = inet_listen_opts(opts, 0, &local_err);
2753 } else {
2754 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
2755 }
2756 }
2757 if (fd < 0) {
2758 goto fail;
2759 }
2760
2761 if (!is_waitconnect)
2762 qemu_set_nonblock(fd);
2763
2764 chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet,
2765 is_waitconnect, &local_err);
2766 if (error_is_set(&local_err)) {
2767 goto fail;
2768 }
2769 return chr;
2770
2771
2772 fail:
2773 if (local_err) {
2774 qerror_report_err(local_err);
2775 error_free(local_err);
2776 }
2777 if (fd >= 0) {
2778 closesocket(fd);
2779 }
2780 if (chr) {
2781 g_free(chr->opaque);
2782 g_free(chr);
2783 }
2784 return NULL;
2785 }
2786
2787 /*********************************************************/
2788 /* Ring buffer chardev */
2789
2790 typedef struct {
2791 size_t size;
2792 size_t prod;
2793 size_t cons;
2794 uint8_t *cbuf;
2795 } RingBufCharDriver;
2796
2797 static size_t ringbuf_count(const CharDriverState *chr)
2798 {
2799 const RingBufCharDriver *d = chr->opaque;
2800
2801 return d->prod - d->cons;
2802 }
2803
2804 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2805 {
2806 RingBufCharDriver *d = chr->opaque;
2807 int i;
2808
2809 if (!buf || (len < 0)) {
2810 return -1;
2811 }
2812
2813 for (i = 0; i < len; i++ ) {
2814 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
2815 if (d->prod - d->cons > d->size) {
2816 d->cons = d->prod - d->size;
2817 }
2818 }
2819
2820 return 0;
2821 }
2822
2823 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
2824 {
2825 RingBufCharDriver *d = chr->opaque;
2826 int i;
2827
2828 for (i = 0; i < len && d->cons != d->prod; i++) {
2829 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
2830 }
2831
2832 return i;
2833 }
2834
2835 static void ringbuf_chr_close(struct CharDriverState *chr)
2836 {
2837 RingBufCharDriver *d = chr->opaque;
2838
2839 g_free(d->cbuf);
2840 g_free(d);
2841 chr->opaque = NULL;
2842 }
2843
2844 static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts,
2845 Error **errp)
2846 {
2847 CharDriverState *chr;
2848 RingBufCharDriver *d;
2849
2850 chr = g_malloc0(sizeof(CharDriverState));
2851 d = g_malloc(sizeof(*d));
2852
2853 d->size = opts->has_size ? opts->size : 65536;
2854
2855 /* The size must be power of 2 */
2856 if (d->size & (d->size - 1)) {
2857 error_setg(errp, "size of ringbuf chardev must be power of two");
2858 goto fail;
2859 }
2860
2861 d->prod = 0;
2862 d->cons = 0;
2863 d->cbuf = g_malloc0(d->size);
2864
2865 chr->opaque = d;
2866 chr->chr_write = ringbuf_chr_write;
2867 chr->chr_close = ringbuf_chr_close;
2868
2869 return chr;
2870
2871 fail:
2872 g_free(d);
2873 g_free(chr);
2874 return NULL;
2875 }
2876
2877 static bool chr_is_ringbuf(const CharDriverState *chr)
2878 {
2879 return chr->chr_write == ringbuf_chr_write;
2880 }
2881
2882 void qmp_ringbuf_write(const char *device, const char *data,
2883 bool has_format, enum DataFormat format,
2884 Error **errp)
2885 {
2886 CharDriverState *chr;
2887 const uint8_t *write_data;
2888 int ret;
2889 size_t write_count;
2890
2891 chr = qemu_chr_find(device);
2892 if (!chr) {
2893 error_setg(errp, "Device '%s' not found", device);
2894 return;
2895 }
2896
2897 if (!chr_is_ringbuf(chr)) {
2898 error_setg(errp,"%s is not a ringbuf device", device);
2899 return;
2900 }
2901
2902 if (has_format && (format == DATA_FORMAT_BASE64)) {
2903 write_data = g_base64_decode(data, &write_count);
2904 } else {
2905 write_data = (uint8_t *)data;
2906 write_count = strlen(data);
2907 }
2908
2909 ret = ringbuf_chr_write(chr, write_data, write_count);
2910
2911 if (write_data != (uint8_t *)data) {
2912 g_free((void *)write_data);
2913 }
2914
2915 if (ret < 0) {
2916 error_setg(errp, "Failed to write to device %s", device);
2917 return;
2918 }
2919 }
2920
2921 char *qmp_ringbuf_read(const char *device, int64_t size,
2922 bool has_format, enum DataFormat format,
2923 Error **errp)
2924 {
2925 CharDriverState *chr;
2926 uint8_t *read_data;
2927 size_t count;
2928 char *data;
2929
2930 chr = qemu_chr_find(device);
2931 if (!chr) {
2932 error_setg(errp, "Device '%s' not found", device);
2933 return NULL;
2934 }
2935
2936 if (!chr_is_ringbuf(chr)) {
2937 error_setg(errp,"%s is not a ringbuf device", device);
2938 return NULL;
2939 }
2940
2941 if (size <= 0) {
2942 error_setg(errp, "size must be greater than zero");
2943 return NULL;
2944 }
2945
2946 count = ringbuf_count(chr);
2947 size = size > count ? count : size;
2948 read_data = g_malloc(size + 1);
2949
2950 ringbuf_chr_read(chr, read_data, size);
2951
2952 if (has_format && (format == DATA_FORMAT_BASE64)) {
2953 data = g_base64_encode(read_data, size);
2954 g_free(read_data);
2955 } else {
2956 /*
2957 * FIXME should read only complete, valid UTF-8 characters up
2958 * to @size bytes. Invalid sequences should be replaced by a
2959 * suitable replacement character. Except when (and only
2960 * when) ring buffer lost characters since last read, initial
2961 * continuation characters should be dropped.
2962 */
2963 read_data[size] = 0;
2964 data = (char *)read_data;
2965 }
2966
2967 return data;
2968 }
2969
2970 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2971 {
2972 char host[65], port[33], width[8], height[8];
2973 int pos;
2974 const char *p;
2975 QemuOpts *opts;
2976 Error *local_err = NULL;
2977
2978 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
2979 if (error_is_set(&local_err)) {
2980 qerror_report_err(local_err);
2981 error_free(local_err);
2982 return NULL;
2983 }
2984
2985 if (strstart(filename, "mon:", &p)) {
2986 filename = p;
2987 qemu_opt_set(opts, "mux", "on");
2988 }
2989
2990 if (strcmp(filename, "null") == 0 ||
2991 strcmp(filename, "pty") == 0 ||
2992 strcmp(filename, "msmouse") == 0 ||
2993 strcmp(filename, "braille") == 0 ||
2994 strcmp(filename, "stdio") == 0) {
2995 qemu_opt_set(opts, "backend", filename);
2996 return opts;
2997 }
2998 if (strstart(filename, "vc", &p)) {
2999 qemu_opt_set(opts, "backend", "vc");
3000 if (*p == ':') {
3001 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
3002 /* pixels */
3003 qemu_opt_set(opts, "width", width);
3004 qemu_opt_set(opts, "height", height);
3005 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
3006 /* chars */
3007 qemu_opt_set(opts, "cols", width);
3008 qemu_opt_set(opts, "rows", height);
3009 } else {
3010 goto fail;
3011 }
3012 }
3013 return opts;
3014 }
3015 if (strcmp(filename, "con:") == 0) {
3016 qemu_opt_set(opts, "backend", "console");
3017 return opts;
3018 }
3019 if (strstart(filename, "COM", NULL)) {
3020 qemu_opt_set(opts, "backend", "serial");
3021 qemu_opt_set(opts, "path", filename);
3022 return opts;
3023 }
3024 if (strstart(filename, "file:", &p)) {
3025 qemu_opt_set(opts, "backend", "file");
3026 qemu_opt_set(opts, "path", p);
3027 return opts;
3028 }
3029 if (strstart(filename, "pipe:", &p)) {
3030 qemu_opt_set(opts, "backend", "pipe");
3031 qemu_opt_set(opts, "path", p);
3032 return opts;
3033 }
3034 if (strstart(filename, "tcp:", &p) ||
3035 strstart(filename, "telnet:", &p)) {
3036 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3037 host[0] = 0;
3038 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3039 goto fail;
3040 }
3041 qemu_opt_set(opts, "backend", "socket");
3042 qemu_opt_set(opts, "host", host);
3043 qemu_opt_set(opts, "port", port);
3044 if (p[pos] == ',') {
3045 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
3046 goto fail;
3047 }
3048 if (strstart(filename, "telnet:", &p))
3049 qemu_opt_set(opts, "telnet", "on");
3050 return opts;
3051 }
3052 if (strstart(filename, "udp:", &p)) {
3053 qemu_opt_set(opts, "backend", "udp");
3054 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3055 host[0] = 0;
3056 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3057 goto fail;
3058 }
3059 }
3060 qemu_opt_set(opts, "host", host);
3061 qemu_opt_set(opts, "port", port);
3062 if (p[pos] == '@') {
3063 p += pos + 1;
3064 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3065 host[0] = 0;
3066 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3067 goto fail;
3068 }
3069 }
3070 qemu_opt_set(opts, "localaddr", host);
3071 qemu_opt_set(opts, "localport", port);
3072 }
3073 return opts;
3074 }
3075 if (strstart(filename, "unix:", &p)) {
3076 qemu_opt_set(opts, "backend", "socket");
3077 if (qemu_opts_do_parse(opts, p, "path") != 0)
3078 goto fail;
3079 return opts;
3080 }
3081 if (strstart(filename, "/dev/parport", NULL) ||
3082 strstart(filename, "/dev/ppi", NULL)) {
3083 qemu_opt_set(opts, "backend", "parport");
3084 qemu_opt_set(opts, "path", filename);
3085 return opts;
3086 }
3087 if (strstart(filename, "/dev/", NULL)) {
3088 qemu_opt_set(opts, "backend", "tty");
3089 qemu_opt_set(opts, "path", filename);
3090 return opts;
3091 }
3092
3093 fail:
3094 qemu_opts_del(opts);
3095 return NULL;
3096 }
3097
3098 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3099 Error **errp)
3100 {
3101 const char *path = qemu_opt_get(opts, "path");
3102
3103 if (path == NULL) {
3104 error_setg(errp, "chardev: file: no filename given");
3105 return;
3106 }
3107 backend->file = g_new0(ChardevFile, 1);
3108 backend->file->out = g_strdup(path);
3109 }
3110
3111 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3112 Error **errp)
3113 {
3114 backend->stdio = g_new0(ChardevStdio, 1);
3115 backend->stdio->has_signal = true;
3116 backend->stdio->signal =
3117 qemu_opt_get_bool(opts, "signal", display_type != DT_NOGRAPHIC);
3118 }
3119
3120 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3121 Error **errp)
3122 {
3123 const char *device = qemu_opt_get(opts, "path");
3124
3125 if (device == NULL) {
3126 error_setg(errp, "chardev: serial/tty: no device path given");
3127 return;
3128 }
3129 backend->serial = g_new0(ChardevHostdev, 1);
3130 backend->serial->device = g_strdup(device);
3131 }
3132
3133 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3134 Error **errp)
3135 {
3136 const char *device = qemu_opt_get(opts, "path");
3137
3138 if (device == NULL) {
3139 error_setg(errp, "chardev: parallel: no device path given");
3140 return;
3141 }
3142 backend->parallel = g_new0(ChardevHostdev, 1);
3143 backend->parallel->device = g_strdup(device);
3144 }
3145
3146 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3147 Error **errp)
3148 {
3149 const char *device = qemu_opt_get(opts, "path");
3150
3151 if (device == NULL) {
3152 error_setg(errp, "chardev: pipe: no device path given");
3153 return;
3154 }
3155 backend->pipe = g_new0(ChardevHostdev, 1);
3156 backend->pipe->device = g_strdup(device);
3157 }
3158
3159 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3160 Error **errp)
3161 {
3162 int val;
3163
3164 backend->memory = g_new0(ChardevRingbuf, 1);
3165
3166 val = qemu_opt_get_number(opts, "size", 0);
3167 if (val != 0) {
3168 backend->memory->has_size = true;
3169 backend->memory->size = val;
3170 }
3171 }
3172
3173 typedef struct CharDriver {
3174 const char *name;
3175 /* old, pre qapi */
3176 CharDriverState *(*open)(QemuOpts *opts);
3177 /* new, qapi-based */
3178 int kind;
3179 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3180 } CharDriver;
3181
3182 static GSList *backends;
3183
3184 void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *))
3185 {
3186 CharDriver *s;
3187
3188 s = g_malloc0(sizeof(*s));
3189 s->name = g_strdup(name);
3190 s->open = open;
3191
3192 backends = g_slist_append(backends, s);
3193 }
3194
3195 void register_char_driver_qapi(const char *name, int kind,
3196 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp))
3197 {
3198 CharDriver *s;
3199
3200 s = g_malloc0(sizeof(*s));
3201 s->name = g_strdup(name);
3202 s->kind = kind;
3203 s->parse = parse;
3204
3205 backends = g_slist_append(backends, s);
3206 }
3207
3208 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3209 void (*init)(struct CharDriverState *s),
3210 Error **errp)
3211 {
3212 CharDriver *cd;
3213 CharDriverState *chr;
3214 GSList *i;
3215
3216 if (qemu_opts_id(opts) == NULL) {
3217 error_setg(errp, "chardev: no id specified");
3218 goto err;
3219 }
3220
3221 if (qemu_opt_get(opts, "backend") == NULL) {
3222 error_setg(errp, "chardev: \"%s\" missing backend",
3223 qemu_opts_id(opts));
3224 goto err;
3225 }
3226 for (i = backends; i; i = i->next) {
3227 cd = i->data;
3228
3229 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3230 break;
3231 }
3232 }
3233 if (i == NULL) {
3234 error_setg(errp, "chardev: backend \"%s\" not found",
3235 qemu_opt_get(opts, "backend"));
3236 return NULL;
3237 }
3238
3239 if (!cd->open) {
3240 /* using new, qapi init */
3241 ChardevBackend *backend = g_new0(ChardevBackend, 1);
3242 ChardevReturn *ret = NULL;
3243 const char *id = qemu_opts_id(opts);
3244 const char *bid = NULL;
3245
3246 if (qemu_opt_get_bool(opts, "mux", 0)) {
3247 bid = g_strdup_printf("%s-base", id);
3248 }
3249
3250 chr = NULL;
3251 backend->kind = cd->kind;
3252 if (cd->parse) {
3253 cd->parse(opts, backend, errp);
3254 if (error_is_set(errp)) {
3255 goto qapi_out;
3256 }
3257 }
3258 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3259 if (error_is_set(errp)) {
3260 goto qapi_out;
3261 }
3262
3263 if (bid) {
3264 qapi_free_ChardevBackend(backend);
3265 qapi_free_ChardevReturn(ret);
3266 backend = g_new0(ChardevBackend, 1);
3267 backend->mux = g_new0(ChardevMux, 1);
3268 backend->kind = CHARDEV_BACKEND_KIND_MUX;
3269 backend->mux->chardev = g_strdup(bid);
3270 ret = qmp_chardev_add(id, backend, errp);
3271 if (error_is_set(errp)) {
3272 goto qapi_out;
3273 }
3274 }
3275
3276 chr = qemu_chr_find(id);
3277
3278 qapi_out:
3279 qapi_free_ChardevBackend(backend);
3280 qapi_free_ChardevReturn(ret);
3281 return chr;
3282 }
3283
3284 chr = cd->open(opts);
3285 if (!chr) {
3286 error_setg(errp, "chardev: opening backend \"%s\" failed",
3287 qemu_opt_get(opts, "backend"));
3288 goto err;
3289 }
3290
3291 if (!chr->filename)
3292 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
3293 chr->init = init;
3294 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3295
3296 if (qemu_opt_get_bool(opts, "mux", 0)) {
3297 CharDriverState *base = chr;
3298 int len = strlen(qemu_opts_id(opts)) + 6;
3299 base->label = g_malloc(len);
3300 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
3301 chr = qemu_chr_open_mux(base);
3302 chr->filename = base->filename;
3303 chr->avail_connections = MAX_MUX;
3304 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3305 } else {
3306 chr->avail_connections = 1;
3307 }
3308 chr->label = g_strdup(qemu_opts_id(opts));
3309 chr->opts = opts;
3310 return chr;
3311
3312 err:
3313 qemu_opts_del(opts);
3314 return NULL;
3315 }
3316
3317 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3318 {
3319 const char *p;
3320 CharDriverState *chr;
3321 QemuOpts *opts;
3322 Error *err = NULL;
3323
3324 if (strstart(filename, "chardev:", &p)) {
3325 return qemu_chr_find(p);
3326 }
3327
3328 opts = qemu_chr_parse_compat(label, filename);
3329 if (!opts)
3330 return NULL;
3331
3332 chr = qemu_chr_new_from_opts(opts, init, &err);
3333 if (error_is_set(&err)) {
3334 fprintf(stderr, "%s\n", error_get_pretty(err));
3335 error_free(err);
3336 }
3337 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3338 qemu_chr_fe_claim_no_fail(chr);
3339 monitor_init(chr, MONITOR_USE_READLINE);
3340 }
3341 return chr;
3342 }
3343
3344 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3345 {
3346 if (chr->chr_set_echo) {
3347 chr->chr_set_echo(chr, echo);
3348 }
3349 }
3350
3351 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
3352 {
3353 if (chr->fe_open == fe_open) {
3354 return;
3355 }
3356 chr->fe_open = fe_open;
3357 if (chr->chr_set_fe_open) {
3358 chr->chr_set_fe_open(chr, fe_open);
3359 }
3360 }
3361
3362 int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3363 GIOFunc func, void *user_data)
3364 {
3365 GSource *src;
3366 guint tag;
3367
3368 if (s->chr_add_watch == NULL) {
3369 return -ENOSYS;
3370 }
3371
3372 src = s->chr_add_watch(s, cond);
3373 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3374 tag = g_source_attach(src, NULL);
3375 g_source_unref(src);
3376
3377 return tag;
3378 }
3379
3380 int qemu_chr_fe_claim(CharDriverState *s)
3381 {
3382 if (s->avail_connections < 1) {
3383 return -1;
3384 }
3385 s->avail_connections--;
3386 return 0;
3387 }
3388
3389 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
3390 {
3391 if (qemu_chr_fe_claim(s) != 0) {
3392 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
3393 __func__, s->label);
3394 exit(1);
3395 }
3396 }
3397
3398 void qemu_chr_fe_release(CharDriverState *s)
3399 {
3400 s->avail_connections++;
3401 }
3402
3403 void qemu_chr_delete(CharDriverState *chr)
3404 {
3405 QTAILQ_REMOVE(&chardevs, chr, next);
3406 if (chr->chr_close) {
3407 chr->chr_close(chr);
3408 }
3409 g_free(chr->filename);
3410 g_free(chr->label);
3411 if (chr->opts) {
3412 qemu_opts_del(chr->opts);
3413 }
3414 g_free(chr);
3415 }
3416
3417 ChardevInfoList *qmp_query_chardev(Error **errp)
3418 {
3419 ChardevInfoList *chr_list = NULL;
3420 CharDriverState *chr;
3421
3422 QTAILQ_FOREACH(chr, &chardevs, next) {
3423 ChardevInfoList *info = g_malloc0(sizeof(*info));
3424 info->value = g_malloc0(sizeof(*info->value));
3425 info->value->label = g_strdup(chr->label);
3426 info->value->filename = g_strdup(chr->filename);
3427
3428 info->next = chr_list;
3429 chr_list = info;
3430 }
3431
3432 return chr_list;
3433 }
3434
3435 CharDriverState *qemu_chr_find(const char *name)
3436 {
3437 CharDriverState *chr;
3438
3439 QTAILQ_FOREACH(chr, &chardevs, next) {
3440 if (strcmp(chr->label, name) != 0)
3441 continue;
3442 return chr;
3443 }
3444 return NULL;
3445 }
3446
3447 /* Get a character (serial) device interface. */
3448 CharDriverState *qemu_char_get_next_serial(void)
3449 {
3450 static int next_serial;
3451 CharDriverState *chr;
3452
3453 /* FIXME: This function needs to go away: use chardev properties! */
3454
3455 while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
3456 chr = serial_hds[next_serial++];
3457 qemu_chr_fe_claim_no_fail(chr);
3458 return chr;
3459 }
3460 return NULL;
3461 }
3462
3463 QemuOptsList qemu_chardev_opts = {
3464 .name = "chardev",
3465 .implied_opt_name = "backend",
3466 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3467 .desc = {
3468 {
3469 .name = "backend",
3470 .type = QEMU_OPT_STRING,
3471 },{
3472 .name = "path",
3473 .type = QEMU_OPT_STRING,
3474 },{
3475 .name = "host",
3476 .type = QEMU_OPT_STRING,
3477 },{
3478 .name = "port",
3479 .type = QEMU_OPT_STRING,
3480 },{
3481 .name = "localaddr",
3482 .type = QEMU_OPT_STRING,
3483 },{
3484 .name = "localport",
3485 .type = QEMU_OPT_STRING,
3486 },{
3487 .name = "to",
3488 .type = QEMU_OPT_NUMBER,
3489 },{
3490 .name = "ipv4",
3491 .type = QEMU_OPT_BOOL,
3492 },{
3493 .name = "ipv6",
3494 .type = QEMU_OPT_BOOL,
3495 },{
3496 .name = "wait",
3497 .type = QEMU_OPT_BOOL,
3498 },{
3499 .name = "server",
3500 .type = QEMU_OPT_BOOL,
3501 },{
3502 .name = "delay",
3503 .type = QEMU_OPT_BOOL,
3504 },{
3505 .name = "telnet",
3506 .type = QEMU_OPT_BOOL,
3507 },{
3508 .name = "width",
3509 .type = QEMU_OPT_NUMBER,
3510 },{
3511 .name = "height",
3512 .type = QEMU_OPT_NUMBER,
3513 },{
3514 .name = "cols",
3515 .type = QEMU_OPT_NUMBER,
3516 },{
3517 .name = "rows",
3518 .type = QEMU_OPT_NUMBER,
3519 },{
3520 .name = "mux",
3521 .type = QEMU_OPT_BOOL,
3522 },{
3523 .name = "signal",
3524 .type = QEMU_OPT_BOOL,
3525 },{
3526 .name = "name",
3527 .type = QEMU_OPT_STRING,
3528 },{
3529 .name = "debug",
3530 .type = QEMU_OPT_NUMBER,
3531 },{
3532 .name = "size",
3533 .type = QEMU_OPT_SIZE,
3534 },
3535 { /* end of list */ }
3536 },
3537 };
3538
3539 #ifdef _WIN32
3540
3541 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3542 {
3543 HANDLE out;
3544
3545 if (file->in) {
3546 error_setg(errp, "input file not supported");
3547 return NULL;
3548 }
3549
3550 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
3551 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
3552 if (out == INVALID_HANDLE_VALUE) {
3553 error_setg(errp, "open %s failed", file->out);
3554 return NULL;
3555 }
3556 return qemu_chr_open_win_file(out);
3557 }
3558
3559 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3560 Error **errp)
3561 {
3562 return qemu_chr_open_win_path(serial->device);
3563 }
3564
3565 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3566 Error **errp)
3567 {
3568 error_setg(errp, "character device backend type 'parallel' not supported");
3569 return NULL;
3570 }
3571
3572 #else /* WIN32 */
3573
3574 static int qmp_chardev_open_file_source(char *src, int flags,
3575 Error **errp)
3576 {
3577 int fd = -1;
3578
3579 TFR(fd = qemu_open(src, flags, 0666));
3580 if (fd == -1) {
3581 error_setg(errp, "open %s: %s", src, strerror(errno));
3582 }
3583 return fd;
3584 }
3585
3586 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3587 {
3588 int flags, in = -1, out = -1;
3589
3590 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
3591 out = qmp_chardev_open_file_source(file->out, flags, errp);
3592 if (error_is_set(errp)) {
3593 return NULL;
3594 }
3595
3596 if (file->in) {
3597 flags = O_RDONLY;
3598 in = qmp_chardev_open_file_source(file->in, flags, errp);
3599 if (error_is_set(errp)) {
3600 qemu_close(out);
3601 return NULL;
3602 }
3603 }
3604
3605 return qemu_chr_open_fd(in, out);
3606 }
3607
3608 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3609 Error **errp)
3610 {
3611 #ifdef HAVE_CHARDEV_TTY
3612 int fd;
3613
3614 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
3615 if (error_is_set(errp)) {
3616 return NULL;
3617 }
3618 qemu_set_nonblock(fd);
3619 return qemu_chr_open_tty_fd(fd);
3620 #else
3621 error_setg(errp, "character device backend type 'serial' not supported");
3622 return NULL;
3623 #endif
3624 }
3625
3626 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3627 Error **errp)
3628 {
3629 #ifdef HAVE_CHARDEV_PARPORT
3630 int fd;
3631
3632 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
3633 if (error_is_set(errp)) {
3634 return NULL;
3635 }
3636 return qemu_chr_open_pp_fd(fd);
3637 #else
3638 error_setg(errp, "character device backend type 'parallel' not supported");
3639 return NULL;
3640 #endif
3641 }
3642
3643 #endif /* WIN32 */
3644
3645 static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
3646 Error **errp)
3647 {
3648 SocketAddress *addr = sock->addr;
3649 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
3650 bool is_listen = sock->has_server ? sock->server : true;
3651 bool is_telnet = sock->has_telnet ? sock->telnet : false;
3652 bool is_waitconnect = sock->has_wait ? sock->wait : false;
3653 int fd;
3654
3655 if (is_listen) {
3656 fd = socket_listen(addr, errp);
3657 } else {
3658 fd = socket_connect(addr, errp, NULL, NULL);
3659 }
3660 if (error_is_set(errp)) {
3661 return NULL;
3662 }
3663 return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
3664 is_telnet, is_waitconnect, errp);
3665 }
3666
3667 static CharDriverState *qmp_chardev_open_dgram(ChardevDgram *dgram,
3668 Error **errp)
3669 {
3670 int fd;
3671
3672 fd = socket_dgram(dgram->remote, dgram->local, errp);
3673 if (error_is_set(errp)) {
3674 return NULL;
3675 }
3676 return qemu_chr_open_udp_fd(fd);
3677 }
3678
3679 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
3680 Error **errp)
3681 {
3682 ChardevReturn *ret = g_new0(ChardevReturn, 1);
3683 CharDriverState *base, *chr = NULL;
3684
3685 chr = qemu_chr_find(id);
3686 if (chr) {
3687 error_setg(errp, "Chardev '%s' already exists", id);
3688 g_free(ret);
3689 return NULL;
3690 }
3691
3692 switch (backend->kind) {
3693 case CHARDEV_BACKEND_KIND_FILE:
3694 chr = qmp_chardev_open_file(backend->file, errp);
3695 break;
3696 case CHARDEV_BACKEND_KIND_SERIAL:
3697 chr = qmp_chardev_open_serial(backend->serial, errp);
3698 break;
3699 case CHARDEV_BACKEND_KIND_PARALLEL:
3700 chr = qmp_chardev_open_parallel(backend->parallel, errp);
3701 break;
3702 case CHARDEV_BACKEND_KIND_PIPE:
3703 chr = qemu_chr_open_pipe(backend->pipe);
3704 break;
3705 case CHARDEV_BACKEND_KIND_SOCKET:
3706 chr = qmp_chardev_open_socket(backend->socket, errp);
3707 break;
3708 case CHARDEV_BACKEND_KIND_DGRAM:
3709 chr = qmp_chardev_open_dgram(backend->dgram, errp);
3710 break;
3711 #ifdef HAVE_CHARDEV_TTY
3712 case CHARDEV_BACKEND_KIND_PTY:
3713 chr = qemu_chr_open_pty(id, ret);
3714 break;
3715 #endif
3716 case CHARDEV_BACKEND_KIND_NULL:
3717 chr = qemu_chr_open_null();
3718 break;
3719 case CHARDEV_BACKEND_KIND_MUX:
3720 base = qemu_chr_find(backend->mux->chardev);
3721 if (base == NULL) {
3722 error_setg(errp, "mux: base chardev %s not found",
3723 backend->mux->chardev);
3724 break;
3725 }
3726 chr = qemu_chr_open_mux(base);
3727 break;
3728 case CHARDEV_BACKEND_KIND_MSMOUSE:
3729 chr = qemu_chr_open_msmouse();
3730 break;
3731 #ifdef CONFIG_BRLAPI
3732 case CHARDEV_BACKEND_KIND_BRAILLE:
3733 chr = chr_baum_init();
3734 break;
3735 #endif
3736 case CHARDEV_BACKEND_KIND_STDIO:
3737 chr = qemu_chr_open_stdio(backend->stdio);
3738 break;
3739 #ifdef _WIN32
3740 case CHARDEV_BACKEND_KIND_CONSOLE:
3741 chr = qemu_chr_open_win_con();
3742 break;
3743 #endif
3744 #ifdef CONFIG_SPICE
3745 case CHARDEV_BACKEND_KIND_SPICEVMC:
3746 chr = qemu_chr_open_spice_vmc(backend->spicevmc->type);
3747 break;
3748 case CHARDEV_BACKEND_KIND_SPICEPORT:
3749 chr = qemu_chr_open_spice_port(backend->spiceport->fqdn);
3750 break;
3751 #endif
3752 case CHARDEV_BACKEND_KIND_VC:
3753 chr = vc_init(backend->vc);
3754 break;
3755 case CHARDEV_BACKEND_KIND_MEMORY:
3756 chr = qemu_chr_open_ringbuf(backend->memory, errp);
3757 break;
3758 default:
3759 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
3760 break;
3761 }
3762
3763 if (chr == NULL && !error_is_set(errp)) {
3764 error_setg(errp, "Failed to create chardev");
3765 }
3766 if (chr) {
3767 chr->label = g_strdup(id);
3768 chr->avail_connections =
3769 (backend->kind == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
3770 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3771 return ret;
3772 } else {
3773 g_free(ret);
3774 return NULL;
3775 }
3776 }
3777
3778 void qmp_chardev_remove(const char *id, Error **errp)
3779 {
3780 CharDriverState *chr;
3781
3782 chr = qemu_chr_find(id);
3783 if (NULL == chr) {
3784 error_setg(errp, "Chardev '%s' not found", id);
3785 return;
3786 }
3787 if (chr->chr_can_read || chr->chr_read ||
3788 chr->chr_event || chr->handler_opaque) {
3789 error_setg(errp, "Chardev '%s' is busy", id);
3790 return;
3791 }
3792 qemu_chr_delete(chr);
3793 }
3794
3795 static void register_types(void)
3796 {
3797 register_char_driver_qapi("null", CHARDEV_BACKEND_KIND_NULL, NULL);
3798 register_char_driver("socket", qemu_chr_open_socket);
3799 register_char_driver("udp", qemu_chr_open_udp);
3800 register_char_driver_qapi("memory", CHARDEV_BACKEND_KIND_MEMORY,
3801 qemu_chr_parse_ringbuf);
3802 register_char_driver_qapi("file", CHARDEV_BACKEND_KIND_FILE,
3803 qemu_chr_parse_file_out);
3804 register_char_driver_qapi("stdio", CHARDEV_BACKEND_KIND_STDIO,
3805 qemu_chr_parse_stdio);
3806 register_char_driver_qapi("serial", CHARDEV_BACKEND_KIND_SERIAL,
3807 qemu_chr_parse_serial);
3808 register_char_driver_qapi("tty", CHARDEV_BACKEND_KIND_SERIAL,
3809 qemu_chr_parse_serial);
3810 register_char_driver_qapi("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
3811 qemu_chr_parse_parallel);
3812 register_char_driver_qapi("parport", CHARDEV_BACKEND_KIND_PARALLEL,
3813 qemu_chr_parse_parallel);
3814 register_char_driver_qapi("pty", CHARDEV_BACKEND_KIND_PTY, NULL);
3815 register_char_driver_qapi("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL);
3816 register_char_driver_qapi("pipe", CHARDEV_BACKEND_KIND_PIPE,
3817 qemu_chr_parse_pipe);
3818 }
3819
3820 type_init(register_types);
Qemu copy for testing