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usb-host: raise libusbx minimum version to 1.0.13
[qemu.git] / qemu-char.c
blobf29f9b1997b8a27ad85aedff12b32a0789ffe70a
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 /* Due to a glib bug, removing the last reference to a source
647 * inside a finalize callback causes recursive locking (and a
648 * deadlock). This is not a problem inside other callbacks,
649 * including dispatch callbacks, so we call io_remove_watch_poll
650 * to remove this source. At this point, iwp->src must
651 * be NULL, or we would leak it.
652 *
653 * This would be solved much more elegantly by child sources,
654 * but we support older glib versions that do not have them.
655 */
656 IOWatchPoll *iwp = io_watch_poll_from_source(source);
657 assert(iwp->src == NULL);
658 }
659
660 static GSourceFuncs io_watch_poll_funcs = {
661 .prepare = io_watch_poll_prepare,
662 .check = io_watch_poll_check,
663 .dispatch = io_watch_poll_dispatch,
664 .finalize = io_watch_poll_finalize,
665 };
666
667 /* Can only be used for read */
668 static guint io_add_watch_poll(GIOChannel *channel,
669 IOCanReadHandler *fd_can_read,
670 GIOFunc fd_read,
671 gpointer user_data)
672 {
673 IOWatchPoll *iwp;
674 int tag;
675
676 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll));
677 iwp->fd_can_read = fd_can_read;
678 iwp->opaque = user_data;
679 iwp->channel = channel;
680 iwp->fd_read = (GSourceFunc) fd_read;
681 iwp->src = NULL;
682
683 tag = g_source_attach(&iwp->parent, NULL);
684 g_source_unref(&iwp->parent);
685 return tag;
686 }
687
688 static void io_remove_watch_poll(guint tag)
689 {
690 GSource *source;
691 IOWatchPoll *iwp;
692
693 g_return_if_fail (tag > 0);
694
695 source = g_main_context_find_source_by_id(NULL, tag);
696 g_return_if_fail (source != NULL);
697
698 iwp = io_watch_poll_from_source(source);
699 if (iwp->src) {
700 g_source_destroy(iwp->src);
701 g_source_unref(iwp->src);
702 iwp->src = NULL;
703 }
704 g_source_destroy(&iwp->parent);
705 }
706
707 #ifndef _WIN32
708 static GIOChannel *io_channel_from_fd(int fd)
709 {
710 GIOChannel *chan;
711
712 if (fd == -1) {
713 return NULL;
714 }
715
716 chan = g_io_channel_unix_new(fd);
717
718 g_io_channel_set_encoding(chan, NULL, NULL);
719 g_io_channel_set_buffered(chan, FALSE);
720
721 return chan;
722 }
723 #endif
724
725 static GIOChannel *io_channel_from_socket(int fd)
726 {
727 GIOChannel *chan;
728
729 if (fd == -1) {
730 return NULL;
731 }
732
733 #ifdef _WIN32
734 chan = g_io_channel_win32_new_socket(fd);
735 #else
736 chan = g_io_channel_unix_new(fd);
737 #endif
738
739 g_io_channel_set_encoding(chan, NULL, NULL);
740 g_io_channel_set_buffered(chan, FALSE);
741
742 return chan;
743 }
744
745 static int io_channel_send(GIOChannel *fd, const void *buf, size_t len)
746 {
747 GIOStatus status;
748 size_t offset;
749
750 offset = 0;
751 while (offset < len) {
752 gsize bytes_written;
753
754 status = g_io_channel_write_chars(fd, buf + offset, len - offset,
755 &bytes_written, NULL);
756 if (status != G_IO_STATUS_NORMAL) {
757 if (status == G_IO_STATUS_AGAIN) {
758 /* If we've written any data, return a partial write. */
759 if (offset) {
760 break;
761 }
762 errno = EAGAIN;
763 } else {
764 errno = EINVAL;
765 }
766
767 return -1;
768 } else if (status == G_IO_STATUS_EOF) {
769 break;
770 }
771
772 offset += bytes_written;
773 }
774
775 return offset;
776 }
777
778 #ifndef _WIN32
779
780 typedef struct FDCharDriver {
781 CharDriverState *chr;
782 GIOChannel *fd_in, *fd_out;
783 guint fd_in_tag;
784 int max_size;
785 QTAILQ_ENTRY(FDCharDriver) node;
786 } FDCharDriver;
787
788 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
789 {
790 FDCharDriver *s = chr->opaque;
791
792 return io_channel_send(s->fd_out, buf, len);
793 }
794
795 static gboolean fd_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
796 {
797 CharDriverState *chr = opaque;
798 FDCharDriver *s = chr->opaque;
799 int len;
800 uint8_t buf[READ_BUF_LEN];
801 GIOStatus status;
802 gsize bytes_read;
803
804 len = sizeof(buf);
805 if (len > s->max_size) {
806 len = s->max_size;
807 }
808 if (len == 0) {
809 return TRUE;
810 }
811
812 status = g_io_channel_read_chars(chan, (gchar *)buf,
813 len, &bytes_read, NULL);
814 if (status == G_IO_STATUS_EOF) {
815 if (s->fd_in_tag) {
816 io_remove_watch_poll(s->fd_in_tag);
817 s->fd_in_tag = 0;
818 }
819 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
820 return FALSE;
821 }
822 if (status == G_IO_STATUS_NORMAL) {
823 qemu_chr_be_write(chr, buf, bytes_read);
824 }
825
826 return TRUE;
827 }
828
829 static int fd_chr_read_poll(void *opaque)
830 {
831 CharDriverState *chr = opaque;
832 FDCharDriver *s = chr->opaque;
833
834 s->max_size = qemu_chr_be_can_write(chr);
835 return s->max_size;
836 }
837
838 static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
839 {
840 FDCharDriver *s = chr->opaque;
841 return g_io_create_watch(s->fd_out, cond);
842 }
843
844 static void fd_chr_update_read_handler(CharDriverState *chr)
845 {
846 FDCharDriver *s = chr->opaque;
847
848 if (s->fd_in_tag) {
849 io_remove_watch_poll(s->fd_in_tag);
850 s->fd_in_tag = 0;
851 }
852
853 if (s->fd_in) {
854 s->fd_in_tag = io_add_watch_poll(s->fd_in, fd_chr_read_poll, fd_chr_read, chr);
855 }
856 }
857
858 static void fd_chr_close(struct CharDriverState *chr)
859 {
860 FDCharDriver *s = chr->opaque;
861
862 if (s->fd_in_tag) {
863 io_remove_watch_poll(s->fd_in_tag);
864 s->fd_in_tag = 0;
865 }
866
867 if (s->fd_in) {
868 g_io_channel_unref(s->fd_in);
869 }
870 if (s->fd_out) {
871 g_io_channel_unref(s->fd_out);
872 }
873
874 g_free(s);
875 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
876 }
877
878 /* open a character device to a unix fd */
879 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
880 {
881 CharDriverState *chr;
882 FDCharDriver *s;
883
884 chr = g_malloc0(sizeof(CharDriverState));
885 s = g_malloc0(sizeof(FDCharDriver));
886 s->fd_in = io_channel_from_fd(fd_in);
887 s->fd_out = io_channel_from_fd(fd_out);
888 fcntl(fd_out, F_SETFL, O_NONBLOCK);
889 s->chr = chr;
890 chr->opaque = s;
891 chr->chr_add_watch = fd_chr_add_watch;
892 chr->chr_write = fd_chr_write;
893 chr->chr_update_read_handler = fd_chr_update_read_handler;
894 chr->chr_close = fd_chr_close;
895
896 qemu_chr_be_generic_open(chr);
897
898 return chr;
899 }
900
901 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
902 {
903 int fd_in, fd_out;
904 char filename_in[256], filename_out[256];
905 const char *filename = opts->device;
906
907 if (filename == NULL) {
908 fprintf(stderr, "chardev: pipe: no filename given\n");
909 return NULL;
910 }
911
912 snprintf(filename_in, 256, "%s.in", filename);
913 snprintf(filename_out, 256, "%s.out", filename);
914 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
915 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
916 if (fd_in < 0 || fd_out < 0) {
917 if (fd_in >= 0)
918 close(fd_in);
919 if (fd_out >= 0)
920 close(fd_out);
921 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
922 if (fd_in < 0) {
923 return NULL;
924 }
925 }
926 return qemu_chr_open_fd(fd_in, fd_out);
927 }
928
929 /* init terminal so that we can grab keys */
930 static struct termios oldtty;
931 static int old_fd0_flags;
932 static bool stdio_allow_signal;
933
934 static void term_exit(void)
935 {
936 tcsetattr (0, TCSANOW, &oldtty);
937 fcntl(0, F_SETFL, old_fd0_flags);
938 }
939
940 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
941 {
942 struct termios tty;
943
944 tty = oldtty;
945 if (!echo) {
946 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
947 |INLCR|IGNCR|ICRNL|IXON);
948 tty.c_oflag |= OPOST;
949 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
950 tty.c_cflag &= ~(CSIZE|PARENB);
951 tty.c_cflag |= CS8;
952 tty.c_cc[VMIN] = 1;
953 tty.c_cc[VTIME] = 0;
954 }
955 /* if graphical mode, we allow Ctrl-C handling */
956 if (!stdio_allow_signal)
957 tty.c_lflag &= ~ISIG;
958
959 tcsetattr (0, TCSANOW, &tty);
960 }
961
962 static void qemu_chr_close_stdio(struct CharDriverState *chr)
963 {
964 term_exit();
965 fd_chr_close(chr);
966 }
967
968 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
969 {
970 CharDriverState *chr;
971
972 if (is_daemonized()) {
973 error_report("cannot use stdio with -daemonize");
974 return NULL;
975 }
976 old_fd0_flags = fcntl(0, F_GETFL);
977 tcgetattr (0, &oldtty);
978 fcntl(0, F_SETFL, O_NONBLOCK);
979 atexit(term_exit);
980
981 chr = qemu_chr_open_fd(0, 1);
982 chr->chr_close = qemu_chr_close_stdio;
983 chr->chr_set_echo = qemu_chr_set_echo_stdio;
984 stdio_allow_signal = display_type != DT_NOGRAPHIC;
985 if (opts->has_signal) {
986 stdio_allow_signal = opts->signal;
987 }
988 qemu_chr_fe_set_echo(chr, false);
989
990 return chr;
991 }
992
993 #ifdef __sun__
994 /* Once Solaris has openpty(), this is going to be removed. */
995 static int openpty(int *amaster, int *aslave, char *name,
996 struct termios *termp, struct winsize *winp)
997 {
998 const char *slave;
999 int mfd = -1, sfd = -1;
1000
1001 *amaster = *aslave = -1;
1002
1003 mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
1004 if (mfd < 0)
1005 goto err;
1006
1007 if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
1008 goto err;
1009
1010 if ((slave = ptsname(mfd)) == NULL)
1011 goto err;
1012
1013 if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
1014 goto err;
1015
1016 if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
1017 (termp != NULL && tcgetattr(sfd, termp) < 0))
1018 goto err;
1019
1020 if (amaster)
1021 *amaster = mfd;
1022 if (aslave)
1023 *aslave = sfd;
1024 if (winp)
1025 ioctl(sfd, TIOCSWINSZ, winp);
1026
1027 return 0;
1028
1029 err:
1030 if (sfd != -1)
1031 close(sfd);
1032 close(mfd);
1033 return -1;
1034 }
1035
1036 static void cfmakeraw (struct termios *termios_p)
1037 {
1038 termios_p->c_iflag &=
1039 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
1040 termios_p->c_oflag &= ~OPOST;
1041 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
1042 termios_p->c_cflag &= ~(CSIZE|PARENB);
1043 termios_p->c_cflag |= CS8;
1044
1045 termios_p->c_cc[VMIN] = 0;
1046 termios_p->c_cc[VTIME] = 0;
1047 }
1048 #endif
1049
1050 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1051 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
1052 || defined(__GLIBC__)
1053
1054 #define HAVE_CHARDEV_TTY 1
1055
1056 typedef struct {
1057 GIOChannel *fd;
1058 guint fd_tag;
1059 int connected;
1060 int read_bytes;
1061 guint timer_tag;
1062 } PtyCharDriver;
1063
1064 static void pty_chr_update_read_handler(CharDriverState *chr);
1065 static void pty_chr_state(CharDriverState *chr, int connected);
1066
1067 static gboolean pty_chr_timer(gpointer opaque)
1068 {
1069 struct CharDriverState *chr = opaque;
1070 PtyCharDriver *s = chr->opaque;
1071
1072 if (s->connected) {
1073 goto out;
1074 }
1075
1076 /* Next poll ... */
1077 pty_chr_update_read_handler(chr);
1078
1079 out:
1080 return FALSE;
1081 }
1082
1083 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1084 {
1085 PtyCharDriver *s = chr->opaque;
1086
1087 if (s->timer_tag) {
1088 g_source_remove(s->timer_tag);
1089 s->timer_tag = 0;
1090 }
1091
1092 if (ms == 1000) {
1093 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1094 } else {
1095 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1096 }
1097 }
1098
1099 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1100 {
1101 PtyCharDriver *s = chr->opaque;
1102
1103 if (!s->connected) {
1104 /* guest sends data, check for (re-)connect */
1105 pty_chr_update_read_handler(chr);
1106 return 0;
1107 }
1108 return io_channel_send(s->fd, buf, len);
1109 }
1110
1111 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1112 {
1113 PtyCharDriver *s = chr->opaque;
1114 return g_io_create_watch(s->fd, cond);
1115 }
1116
1117 static int pty_chr_read_poll(void *opaque)
1118 {
1119 CharDriverState *chr = opaque;
1120 PtyCharDriver *s = chr->opaque;
1121
1122 s->read_bytes = qemu_chr_be_can_write(chr);
1123 return s->read_bytes;
1124 }
1125
1126 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1127 {
1128 CharDriverState *chr = opaque;
1129 PtyCharDriver *s = chr->opaque;
1130 gsize size, len;
1131 uint8_t buf[READ_BUF_LEN];
1132 GIOStatus status;
1133
1134 len = sizeof(buf);
1135 if (len > s->read_bytes)
1136 len = s->read_bytes;
1137 if (len == 0) {
1138 return TRUE;
1139 }
1140 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1141 if (status != G_IO_STATUS_NORMAL) {
1142 pty_chr_state(chr, 0);
1143 return FALSE;
1144 } else {
1145 pty_chr_state(chr, 1);
1146 qemu_chr_be_write(chr, buf, size);
1147 }
1148 return TRUE;
1149 }
1150
1151 static void pty_chr_update_read_handler(CharDriverState *chr)
1152 {
1153 PtyCharDriver *s = chr->opaque;
1154 GPollFD pfd;
1155
1156 pfd.fd = g_io_channel_unix_get_fd(s->fd);
1157 pfd.events = G_IO_OUT;
1158 pfd.revents = 0;
1159 g_poll(&pfd, 1, 0);
1160 if (pfd.revents & G_IO_HUP) {
1161 pty_chr_state(chr, 0);
1162 } else {
1163 pty_chr_state(chr, 1);
1164 }
1165 }
1166
1167 static void pty_chr_state(CharDriverState *chr, int connected)
1168 {
1169 PtyCharDriver *s = chr->opaque;
1170
1171 if (!connected) {
1172 if (s->fd_tag) {
1173 io_remove_watch_poll(s->fd_tag);
1174 s->fd_tag = 0;
1175 }
1176 s->connected = 0;
1177 /* (re-)connect poll interval for idle guests: once per second.
1178 * We check more frequently in case the guests sends data to
1179 * the virtual device linked to our pty. */
1180 pty_chr_rearm_timer(chr, 1000);
1181 } else {
1182 if (s->timer_tag) {
1183 g_source_remove(s->timer_tag);
1184 s->timer_tag = 0;
1185 }
1186 if (!s->connected) {
1187 qemu_chr_be_generic_open(chr);
1188 s->connected = 1;
1189 s->fd_tag = io_add_watch_poll(s->fd, pty_chr_read_poll, pty_chr_read, chr);
1190 }
1191 }
1192 }
1193
1194
1195 static void pty_chr_close(struct CharDriverState *chr)
1196 {
1197 PtyCharDriver *s = chr->opaque;
1198 int fd;
1199
1200 if (s->fd_tag) {
1201 io_remove_watch_poll(s->fd_tag);
1202 s->fd_tag = 0;
1203 }
1204 fd = g_io_channel_unix_get_fd(s->fd);
1205 g_io_channel_unref(s->fd);
1206 close(fd);
1207 if (s->timer_tag) {
1208 g_source_remove(s->timer_tag);
1209 s->timer_tag = 0;
1210 }
1211 g_free(s);
1212 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1213 }
1214
1215 static CharDriverState *qemu_chr_open_pty(const char *id,
1216 ChardevReturn *ret)
1217 {
1218 CharDriverState *chr;
1219 PtyCharDriver *s;
1220 struct termios tty;
1221 int master_fd, slave_fd;
1222 #if defined(__OpenBSD__) || defined(__DragonFly__)
1223 char pty_name[PATH_MAX];
1224 #define q_ptsname(x) pty_name
1225 #else
1226 char *pty_name = NULL;
1227 #define q_ptsname(x) ptsname(x)
1228 #endif
1229
1230 if (openpty(&master_fd, &slave_fd, pty_name, NULL, NULL) < 0) {
1231 return NULL;
1232 }
1233
1234 /* Set raw attributes on the pty. */
1235 tcgetattr(slave_fd, &tty);
1236 cfmakeraw(&tty);
1237 tcsetattr(slave_fd, TCSAFLUSH, &tty);
1238 close(slave_fd);
1239
1240 chr = g_malloc0(sizeof(CharDriverState));
1241
1242 chr->filename = g_strdup_printf("pty:%s", q_ptsname(master_fd));
1243 ret->pty = g_strdup(q_ptsname(master_fd));
1244 ret->has_pty = true;
1245
1246 fprintf(stderr, "char device redirected to %s (label %s)\n",
1247 q_ptsname(master_fd), id);
1248
1249 s = g_malloc0(sizeof(PtyCharDriver));
1250 chr->opaque = s;
1251 chr->chr_write = pty_chr_write;
1252 chr->chr_update_read_handler = pty_chr_update_read_handler;
1253 chr->chr_close = pty_chr_close;
1254 chr->chr_add_watch = pty_chr_add_watch;
1255
1256 s->fd = io_channel_from_fd(master_fd);
1257 s->timer_tag = 0;
1258
1259 return chr;
1260 }
1261
1262 static void tty_serial_init(int fd, int speed,
1263 int parity, int data_bits, int stop_bits)
1264 {
1265 struct termios tty;
1266 speed_t spd;
1267
1268 #if 0
1269 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1270 speed, parity, data_bits, stop_bits);
1271 #endif
1272 tcgetattr (fd, &tty);
1273
1274 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1275 speed = speed * 10 / 11;
1276 do {
1277 check_speed(50);
1278 check_speed(75);
1279 check_speed(110);
1280 check_speed(134);
1281 check_speed(150);
1282 check_speed(200);
1283 check_speed(300);
1284 check_speed(600);
1285 check_speed(1200);
1286 check_speed(1800);
1287 check_speed(2400);
1288 check_speed(4800);
1289 check_speed(9600);
1290 check_speed(19200);
1291 check_speed(38400);
1292 /* Non-Posix values follow. They may be unsupported on some systems. */
1293 check_speed(57600);
1294 check_speed(115200);
1295 #ifdef B230400
1296 check_speed(230400);
1297 #endif
1298 #ifdef B460800
1299 check_speed(460800);
1300 #endif
1301 #ifdef B500000
1302 check_speed(500000);
1303 #endif
1304 #ifdef B576000
1305 check_speed(576000);
1306 #endif
1307 #ifdef B921600
1308 check_speed(921600);
1309 #endif
1310 #ifdef B1000000
1311 check_speed(1000000);
1312 #endif
1313 #ifdef B1152000
1314 check_speed(1152000);
1315 #endif
1316 #ifdef B1500000
1317 check_speed(1500000);
1318 #endif
1319 #ifdef B2000000
1320 check_speed(2000000);
1321 #endif
1322 #ifdef B2500000
1323 check_speed(2500000);
1324 #endif
1325 #ifdef B3000000
1326 check_speed(3000000);
1327 #endif
1328 #ifdef B3500000
1329 check_speed(3500000);
1330 #endif
1331 #ifdef B4000000
1332 check_speed(4000000);
1333 #endif
1334 spd = B115200;
1335 } while (0);
1336
1337 cfsetispeed(&tty, spd);
1338 cfsetospeed(&tty, spd);
1339
1340 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1341 |INLCR|IGNCR|ICRNL|IXON);
1342 tty.c_oflag |= OPOST;
1343 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1344 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1345 switch(data_bits) {
1346 default:
1347 case 8:
1348 tty.c_cflag |= CS8;
1349 break;
1350 case 7:
1351 tty.c_cflag |= CS7;
1352 break;
1353 case 6:
1354 tty.c_cflag |= CS6;
1355 break;
1356 case 5:
1357 tty.c_cflag |= CS5;
1358 break;
1359 }
1360 switch(parity) {
1361 default:
1362 case 'N':
1363 break;
1364 case 'E':
1365 tty.c_cflag |= PARENB;
1366 break;
1367 case 'O':
1368 tty.c_cflag |= PARENB | PARODD;
1369 break;
1370 }
1371 if (stop_bits == 2)
1372 tty.c_cflag |= CSTOPB;
1373
1374 tcsetattr (fd, TCSANOW, &tty);
1375 }
1376
1377 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1378 {
1379 FDCharDriver *s = chr->opaque;
1380
1381 switch(cmd) {
1382 case CHR_IOCTL_SERIAL_SET_PARAMS:
1383 {
1384 QEMUSerialSetParams *ssp = arg;
1385 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1386 ssp->speed, ssp->parity,
1387 ssp->data_bits, ssp->stop_bits);
1388 }
1389 break;
1390 case CHR_IOCTL_SERIAL_SET_BREAK:
1391 {
1392 int enable = *(int *)arg;
1393 if (enable) {
1394 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1395 }
1396 }
1397 break;
1398 case CHR_IOCTL_SERIAL_GET_TIOCM:
1399 {
1400 int sarg = 0;
1401 int *targ = (int *)arg;
1402 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1403 *targ = 0;
1404 if (sarg & TIOCM_CTS)
1405 *targ |= CHR_TIOCM_CTS;
1406 if (sarg & TIOCM_CAR)
1407 *targ |= CHR_TIOCM_CAR;
1408 if (sarg & TIOCM_DSR)
1409 *targ |= CHR_TIOCM_DSR;
1410 if (sarg & TIOCM_RI)
1411 *targ |= CHR_TIOCM_RI;
1412 if (sarg & TIOCM_DTR)
1413 *targ |= CHR_TIOCM_DTR;
1414 if (sarg & TIOCM_RTS)
1415 *targ |= CHR_TIOCM_RTS;
1416 }
1417 break;
1418 case CHR_IOCTL_SERIAL_SET_TIOCM:
1419 {
1420 int sarg = *(int *)arg;
1421 int targ = 0;
1422 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1423 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1424 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1425 if (sarg & CHR_TIOCM_CTS)
1426 targ |= TIOCM_CTS;
1427 if (sarg & CHR_TIOCM_CAR)
1428 targ |= TIOCM_CAR;
1429 if (sarg & CHR_TIOCM_DSR)
1430 targ |= TIOCM_DSR;
1431 if (sarg & CHR_TIOCM_RI)
1432 targ |= TIOCM_RI;
1433 if (sarg & CHR_TIOCM_DTR)
1434 targ |= TIOCM_DTR;
1435 if (sarg & CHR_TIOCM_RTS)
1436 targ |= TIOCM_RTS;
1437 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1438 }
1439 break;
1440 default:
1441 return -ENOTSUP;
1442 }
1443 return 0;
1444 }
1445
1446 static void qemu_chr_close_tty(CharDriverState *chr)
1447 {
1448 FDCharDriver *s = chr->opaque;
1449 int fd = -1;
1450
1451 if (s) {
1452 fd = g_io_channel_unix_get_fd(s->fd_in);
1453 }
1454
1455 fd_chr_close(chr);
1456
1457 if (fd >= 0) {
1458 close(fd);
1459 }
1460 }
1461
1462 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1463 {
1464 CharDriverState *chr;
1465
1466 tty_serial_init(fd, 115200, 'N', 8, 1);
1467 chr = qemu_chr_open_fd(fd, fd);
1468 chr->chr_ioctl = tty_serial_ioctl;
1469 chr->chr_close = qemu_chr_close_tty;
1470 return chr;
1471 }
1472 #endif /* __linux__ || __sun__ */
1473
1474 #if defined(__linux__)
1475
1476 #define HAVE_CHARDEV_PARPORT 1
1477
1478 typedef struct {
1479 int fd;
1480 int mode;
1481 } ParallelCharDriver;
1482
1483 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1484 {
1485 if (s->mode != mode) {
1486 int m = mode;
1487 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1488 return 0;
1489 s->mode = mode;
1490 }
1491 return 1;
1492 }
1493
1494 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1495 {
1496 ParallelCharDriver *drv = chr->opaque;
1497 int fd = drv->fd;
1498 uint8_t b;
1499
1500 switch(cmd) {
1501 case CHR_IOCTL_PP_READ_DATA:
1502 if (ioctl(fd, PPRDATA, &b) < 0)
1503 return -ENOTSUP;
1504 *(uint8_t *)arg = b;
1505 break;
1506 case CHR_IOCTL_PP_WRITE_DATA:
1507 b = *(uint8_t *)arg;
1508 if (ioctl(fd, PPWDATA, &b) < 0)
1509 return -ENOTSUP;
1510 break;
1511 case CHR_IOCTL_PP_READ_CONTROL:
1512 if (ioctl(fd, PPRCONTROL, &b) < 0)
1513 return -ENOTSUP;
1514 /* Linux gives only the lowest bits, and no way to know data
1515 direction! For better compatibility set the fixed upper
1516 bits. */
1517 *(uint8_t *)arg = b | 0xc0;
1518 break;
1519 case CHR_IOCTL_PP_WRITE_CONTROL:
1520 b = *(uint8_t *)arg;
1521 if (ioctl(fd, PPWCONTROL, &b) < 0)
1522 return -ENOTSUP;
1523 break;
1524 case CHR_IOCTL_PP_READ_STATUS:
1525 if (ioctl(fd, PPRSTATUS, &b) < 0)
1526 return -ENOTSUP;
1527 *(uint8_t *)arg = b;
1528 break;
1529 case CHR_IOCTL_PP_DATA_DIR:
1530 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1531 return -ENOTSUP;
1532 break;
1533 case CHR_IOCTL_PP_EPP_READ_ADDR:
1534 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1535 struct ParallelIOArg *parg = arg;
1536 int n = read(fd, parg->buffer, parg->count);
1537 if (n != parg->count) {
1538 return -EIO;
1539 }
1540 }
1541 break;
1542 case CHR_IOCTL_PP_EPP_READ:
1543 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1544 struct ParallelIOArg *parg = arg;
1545 int n = read(fd, parg->buffer, parg->count);
1546 if (n != parg->count) {
1547 return -EIO;
1548 }
1549 }
1550 break;
1551 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1552 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1553 struct ParallelIOArg *parg = arg;
1554 int n = write(fd, parg->buffer, parg->count);
1555 if (n != parg->count) {
1556 return -EIO;
1557 }
1558 }
1559 break;
1560 case CHR_IOCTL_PP_EPP_WRITE:
1561 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1562 struct ParallelIOArg *parg = arg;
1563 int n = write(fd, parg->buffer, parg->count);
1564 if (n != parg->count) {
1565 return -EIO;
1566 }
1567 }
1568 break;
1569 default:
1570 return -ENOTSUP;
1571 }
1572 return 0;
1573 }
1574
1575 static void pp_close(CharDriverState *chr)
1576 {
1577 ParallelCharDriver *drv = chr->opaque;
1578 int fd = drv->fd;
1579
1580 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1581 ioctl(fd, PPRELEASE);
1582 close(fd);
1583 g_free(drv);
1584 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1585 }
1586
1587 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1588 {
1589 CharDriverState *chr;
1590 ParallelCharDriver *drv;
1591
1592 if (ioctl(fd, PPCLAIM) < 0) {
1593 close(fd);
1594 return NULL;
1595 }
1596
1597 drv = g_malloc0(sizeof(ParallelCharDriver));
1598 drv->fd = fd;
1599 drv->mode = IEEE1284_MODE_COMPAT;
1600
1601 chr = g_malloc0(sizeof(CharDriverState));
1602 chr->chr_write = null_chr_write;
1603 chr->chr_ioctl = pp_ioctl;
1604 chr->chr_close = pp_close;
1605 chr->opaque = drv;
1606
1607 qemu_chr_be_generic_open(chr);
1608
1609 return chr;
1610 }
1611 #endif /* __linux__ */
1612
1613 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1614
1615 #define HAVE_CHARDEV_PARPORT 1
1616
1617 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1618 {
1619 int fd = (int)(intptr_t)chr->opaque;
1620 uint8_t b;
1621
1622 switch(cmd) {
1623 case CHR_IOCTL_PP_READ_DATA:
1624 if (ioctl(fd, PPIGDATA, &b) < 0)
1625 return -ENOTSUP;
1626 *(uint8_t *)arg = b;
1627 break;
1628 case CHR_IOCTL_PP_WRITE_DATA:
1629 b = *(uint8_t *)arg;
1630 if (ioctl(fd, PPISDATA, &b) < 0)
1631 return -ENOTSUP;
1632 break;
1633 case CHR_IOCTL_PP_READ_CONTROL:
1634 if (ioctl(fd, PPIGCTRL, &b) < 0)
1635 return -ENOTSUP;
1636 *(uint8_t *)arg = b;
1637 break;
1638 case CHR_IOCTL_PP_WRITE_CONTROL:
1639 b = *(uint8_t *)arg;
1640 if (ioctl(fd, PPISCTRL, &b) < 0)
1641 return -ENOTSUP;
1642 break;
1643 case CHR_IOCTL_PP_READ_STATUS:
1644 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1645 return -ENOTSUP;
1646 *(uint8_t *)arg = b;
1647 break;
1648 default:
1649 return -ENOTSUP;
1650 }
1651 return 0;
1652 }
1653
1654 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1655 {
1656 CharDriverState *chr;
1657
1658 chr = g_malloc0(sizeof(CharDriverState));
1659 chr->opaque = (void *)(intptr_t)fd;
1660 chr->chr_write = null_chr_write;
1661 chr->chr_ioctl = pp_ioctl;
1662 return chr;
1663 }
1664 #endif
1665
1666 #else /* _WIN32 */
1667
1668 typedef struct {
1669 int max_size;
1670 HANDLE hcom, hrecv, hsend;
1671 OVERLAPPED orecv, osend;
1672 BOOL fpipe;
1673 DWORD len;
1674 } WinCharState;
1675
1676 typedef struct {
1677 HANDLE hStdIn;
1678 HANDLE hInputReadyEvent;
1679 HANDLE hInputDoneEvent;
1680 HANDLE hInputThread;
1681 uint8_t win_stdio_buf;
1682 } WinStdioCharState;
1683
1684 #define NSENDBUF 2048
1685 #define NRECVBUF 2048
1686 #define MAXCONNECT 1
1687 #define NTIMEOUT 5000
1688
1689 static int win_chr_poll(void *opaque);
1690 static int win_chr_pipe_poll(void *opaque);
1691
1692 static void win_chr_close(CharDriverState *chr)
1693 {
1694 WinCharState *s = chr->opaque;
1695
1696 if (s->hsend) {
1697 CloseHandle(s->hsend);
1698 s->hsend = NULL;
1699 }
1700 if (s->hrecv) {
1701 CloseHandle(s->hrecv);
1702 s->hrecv = NULL;
1703 }
1704 if (s->hcom) {
1705 CloseHandle(s->hcom);
1706 s->hcom = NULL;
1707 }
1708 if (s->fpipe)
1709 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1710 else
1711 qemu_del_polling_cb(win_chr_poll, chr);
1712
1713 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1714 }
1715
1716 static int win_chr_init(CharDriverState *chr, const char *filename)
1717 {
1718 WinCharState *s = chr->opaque;
1719 COMMCONFIG comcfg;
1720 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1721 COMSTAT comstat;
1722 DWORD size;
1723 DWORD err;
1724
1725 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1726 if (!s->hsend) {
1727 fprintf(stderr, "Failed CreateEvent\n");
1728 goto fail;
1729 }
1730 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1731 if (!s->hrecv) {
1732 fprintf(stderr, "Failed CreateEvent\n");
1733 goto fail;
1734 }
1735
1736 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1737 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1738 if (s->hcom == INVALID_HANDLE_VALUE) {
1739 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1740 s->hcom = NULL;
1741 goto fail;
1742 }
1743
1744 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1745 fprintf(stderr, "Failed SetupComm\n");
1746 goto fail;
1747 }
1748
1749 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1750 size = sizeof(COMMCONFIG);
1751 GetDefaultCommConfig(filename, &comcfg, &size);
1752 comcfg.dcb.DCBlength = sizeof(DCB);
1753 CommConfigDialog(filename, NULL, &comcfg);
1754
1755 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1756 fprintf(stderr, "Failed SetCommState\n");
1757 goto fail;
1758 }
1759
1760 if (!SetCommMask(s->hcom, EV_ERR)) {
1761 fprintf(stderr, "Failed SetCommMask\n");
1762 goto fail;
1763 }
1764
1765 cto.ReadIntervalTimeout = MAXDWORD;
1766 if (!SetCommTimeouts(s->hcom, &cto)) {
1767 fprintf(stderr, "Failed SetCommTimeouts\n");
1768 goto fail;
1769 }
1770
1771 if (!ClearCommError(s->hcom, &err, &comstat)) {
1772 fprintf(stderr, "Failed ClearCommError\n");
1773 goto fail;
1774 }
1775 qemu_add_polling_cb(win_chr_poll, chr);
1776 return 0;
1777
1778 fail:
1779 win_chr_close(chr);
1780 return -1;
1781 }
1782
1783 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1784 {
1785 WinCharState *s = chr->opaque;
1786 DWORD len, ret, size, err;
1787
1788 len = len1;
1789 ZeroMemory(&s->osend, sizeof(s->osend));
1790 s->osend.hEvent = s->hsend;
1791 while (len > 0) {
1792 if (s->hsend)
1793 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1794 else
1795 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1796 if (!ret) {
1797 err = GetLastError();
1798 if (err == ERROR_IO_PENDING) {
1799 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1800 if (ret) {
1801 buf += size;
1802 len -= size;
1803 } else {
1804 break;
1805 }
1806 } else {
1807 break;
1808 }
1809 } else {
1810 buf += size;
1811 len -= size;
1812 }
1813 }
1814 return len1 - len;
1815 }
1816
1817 static int win_chr_read_poll(CharDriverState *chr)
1818 {
1819 WinCharState *s = chr->opaque;
1820
1821 s->max_size = qemu_chr_be_can_write(chr);
1822 return s->max_size;
1823 }
1824
1825 static void win_chr_readfile(CharDriverState *chr)
1826 {
1827 WinCharState *s = chr->opaque;
1828 int ret, err;
1829 uint8_t buf[READ_BUF_LEN];
1830 DWORD size;
1831
1832 ZeroMemory(&s->orecv, sizeof(s->orecv));
1833 s->orecv.hEvent = s->hrecv;
1834 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1835 if (!ret) {
1836 err = GetLastError();
1837 if (err == ERROR_IO_PENDING) {
1838 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1839 }
1840 }
1841
1842 if (size > 0) {
1843 qemu_chr_be_write(chr, buf, size);
1844 }
1845 }
1846
1847 static void win_chr_read(CharDriverState *chr)
1848 {
1849 WinCharState *s = chr->opaque;
1850
1851 if (s->len > s->max_size)
1852 s->len = s->max_size;
1853 if (s->len == 0)
1854 return;
1855
1856 win_chr_readfile(chr);
1857 }
1858
1859 static int win_chr_poll(void *opaque)
1860 {
1861 CharDriverState *chr = opaque;
1862 WinCharState *s = chr->opaque;
1863 COMSTAT status;
1864 DWORD comerr;
1865
1866 ClearCommError(s->hcom, &comerr, &status);
1867 if (status.cbInQue > 0) {
1868 s->len = status.cbInQue;
1869 win_chr_read_poll(chr);
1870 win_chr_read(chr);
1871 return 1;
1872 }
1873 return 0;
1874 }
1875
1876 static CharDriverState *qemu_chr_open_win_path(const char *filename)
1877 {
1878 CharDriverState *chr;
1879 WinCharState *s;
1880
1881 chr = g_malloc0(sizeof(CharDriverState));
1882 s = g_malloc0(sizeof(WinCharState));
1883 chr->opaque = s;
1884 chr->chr_write = win_chr_write;
1885 chr->chr_close = win_chr_close;
1886
1887 if (win_chr_init(chr, filename) < 0) {
1888 g_free(s);
1889 g_free(chr);
1890 return NULL;
1891 }
1892 qemu_chr_be_generic_open(chr);
1893 return chr;
1894 }
1895
1896 static int win_chr_pipe_poll(void *opaque)
1897 {
1898 CharDriverState *chr = opaque;
1899 WinCharState *s = chr->opaque;
1900 DWORD size;
1901
1902 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1903 if (size > 0) {
1904 s->len = size;
1905 win_chr_read_poll(chr);
1906 win_chr_read(chr);
1907 return 1;
1908 }
1909 return 0;
1910 }
1911
1912 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1913 {
1914 WinCharState *s = chr->opaque;
1915 OVERLAPPED ov;
1916 int ret;
1917 DWORD size;
1918 char openname[256];
1919
1920 s->fpipe = TRUE;
1921
1922 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1923 if (!s->hsend) {
1924 fprintf(stderr, "Failed CreateEvent\n");
1925 goto fail;
1926 }
1927 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1928 if (!s->hrecv) {
1929 fprintf(stderr, "Failed CreateEvent\n");
1930 goto fail;
1931 }
1932
1933 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1934 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1935 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1936 PIPE_WAIT,
1937 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1938 if (s->hcom == INVALID_HANDLE_VALUE) {
1939 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1940 s->hcom = NULL;
1941 goto fail;
1942 }
1943
1944 ZeroMemory(&ov, sizeof(ov));
1945 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1946 ret = ConnectNamedPipe(s->hcom, &ov);
1947 if (ret) {
1948 fprintf(stderr, "Failed ConnectNamedPipe\n");
1949 goto fail;
1950 }
1951
1952 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1953 if (!ret) {
1954 fprintf(stderr, "Failed GetOverlappedResult\n");
1955 if (ov.hEvent) {
1956 CloseHandle(ov.hEvent);
1957 ov.hEvent = NULL;
1958 }
1959 goto fail;
1960 }
1961
1962 if (ov.hEvent) {
1963 CloseHandle(ov.hEvent);
1964 ov.hEvent = NULL;
1965 }
1966 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1967 return 0;
1968
1969 fail:
1970 win_chr_close(chr);
1971 return -1;
1972 }
1973
1974
1975 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
1976 {
1977 const char *filename = opts->device;
1978 CharDriverState *chr;
1979 WinCharState *s;
1980
1981 chr = g_malloc0(sizeof(CharDriverState));
1982 s = g_malloc0(sizeof(WinCharState));
1983 chr->opaque = s;
1984 chr->chr_write = win_chr_write;
1985 chr->chr_close = win_chr_close;
1986
1987 if (win_chr_pipe_init(chr, filename) < 0) {
1988 g_free(s);
1989 g_free(chr);
1990 return NULL;
1991 }
1992 qemu_chr_be_generic_open(chr);
1993 return chr;
1994 }
1995
1996 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1997 {
1998 CharDriverState *chr;
1999 WinCharState *s;
2000
2001 chr = g_malloc0(sizeof(CharDriverState));
2002 s = g_malloc0(sizeof(WinCharState));
2003 s->hcom = fd_out;
2004 chr->opaque = s;
2005 chr->chr_write = win_chr_write;
2006 qemu_chr_be_generic_open(chr);
2007 return chr;
2008 }
2009
2010 static CharDriverState *qemu_chr_open_win_con(void)
2011 {
2012 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
2013 }
2014
2015 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
2016 {
2017 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
2018 DWORD dwSize;
2019 int len1;
2020
2021 len1 = len;
2022
2023 while (len1 > 0) {
2024 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
2025 break;
2026 }
2027 buf += dwSize;
2028 len1 -= dwSize;
2029 }
2030
2031 return len - len1;
2032 }
2033
2034 static void win_stdio_wait_func(void *opaque)
2035 {
2036 CharDriverState *chr = opaque;
2037 WinStdioCharState *stdio = chr->opaque;
2038 INPUT_RECORD buf[4];
2039 int ret;
2040 DWORD dwSize;
2041 int i;
2042
2043 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
2044 &dwSize);
2045
2046 if (!ret) {
2047 /* Avoid error storm */
2048 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2049 return;
2050 }
2051
2052 for (i = 0; i < dwSize; i++) {
2053 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2054
2055 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2056 int j;
2057 if (kev->uChar.AsciiChar != 0) {
2058 for (j = 0; j < kev->wRepeatCount; j++) {
2059 if (qemu_chr_be_can_write(chr)) {
2060 uint8_t c = kev->uChar.AsciiChar;
2061 qemu_chr_be_write(chr, &c, 1);
2062 }
2063 }
2064 }
2065 }
2066 }
2067 }
2068
2069 static DWORD WINAPI win_stdio_thread(LPVOID param)
2070 {
2071 CharDriverState *chr = param;
2072 WinStdioCharState *stdio = chr->opaque;
2073 int ret;
2074 DWORD dwSize;
2075
2076 while (1) {
2077
2078 /* Wait for one byte */
2079 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2080
2081 /* Exit in case of error, continue if nothing read */
2082 if (!ret) {
2083 break;
2084 }
2085 if (!dwSize) {
2086 continue;
2087 }
2088
2089 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2090 if (stdio->win_stdio_buf == '\r') {
2091 continue;
2092 }
2093
2094 /* Signal the main thread and wait until the byte was eaten */
2095 if (!SetEvent(stdio->hInputReadyEvent)) {
2096 break;
2097 }
2098 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2099 != WAIT_OBJECT_0) {
2100 break;
2101 }
2102 }
2103
2104 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2105 return 0;
2106 }
2107
2108 static void win_stdio_thread_wait_func(void *opaque)
2109 {
2110 CharDriverState *chr = opaque;
2111 WinStdioCharState *stdio = chr->opaque;
2112
2113 if (qemu_chr_be_can_write(chr)) {
2114 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2115 }
2116
2117 SetEvent(stdio->hInputDoneEvent);
2118 }
2119
2120 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2121 {
2122 WinStdioCharState *stdio = chr->opaque;
2123 DWORD dwMode = 0;
2124
2125 GetConsoleMode(stdio->hStdIn, &dwMode);
2126
2127 if (echo) {
2128 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2129 } else {
2130 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2131 }
2132 }
2133
2134 static void win_stdio_close(CharDriverState *chr)
2135 {
2136 WinStdioCharState *stdio = chr->opaque;
2137
2138 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2139 CloseHandle(stdio->hInputReadyEvent);
2140 }
2141 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2142 CloseHandle(stdio->hInputDoneEvent);
2143 }
2144 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2145 TerminateThread(stdio->hInputThread, 0);
2146 }
2147
2148 g_free(chr->opaque);
2149 g_free(chr);
2150 }
2151
2152 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
2153 {
2154 CharDriverState *chr;
2155 WinStdioCharState *stdio;
2156 DWORD dwMode;
2157 int is_console = 0;
2158
2159 chr = g_malloc0(sizeof(CharDriverState));
2160 stdio = g_malloc0(sizeof(WinStdioCharState));
2161
2162 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2163 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2164 fprintf(stderr, "cannot open stdio: invalid handle\n");
2165 exit(1);
2166 }
2167
2168 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2169
2170 chr->opaque = stdio;
2171 chr->chr_write = win_stdio_write;
2172 chr->chr_close = win_stdio_close;
2173
2174 if (is_console) {
2175 if (qemu_add_wait_object(stdio->hStdIn,
2176 win_stdio_wait_func, chr)) {
2177 fprintf(stderr, "qemu_add_wait_object: failed\n");
2178 }
2179 } else {
2180 DWORD dwId;
2181
2182 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2183 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2184 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2185 chr, 0, &dwId);
2186
2187 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2188 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2189 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2190 fprintf(stderr, "cannot create stdio thread or event\n");
2191 exit(1);
2192 }
2193 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2194 win_stdio_thread_wait_func, chr)) {
2195 fprintf(stderr, "qemu_add_wait_object: failed\n");
2196 }
2197 }
2198
2199 dwMode |= ENABLE_LINE_INPUT;
2200
2201 if (is_console) {
2202 /* set the terminal in raw mode */
2203 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2204 dwMode |= ENABLE_PROCESSED_INPUT;
2205 }
2206
2207 SetConsoleMode(stdio->hStdIn, dwMode);
2208
2209 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2210 qemu_chr_fe_set_echo(chr, false);
2211
2212 return chr;
2213 }
2214 #endif /* !_WIN32 */
2215
2216
2217 /***********************************************************/
2218 /* UDP Net console */
2219
2220 typedef struct {
2221 int fd;
2222 GIOChannel *chan;
2223 guint tag;
2224 uint8_t buf[READ_BUF_LEN];
2225 int bufcnt;
2226 int bufptr;
2227 int max_size;
2228 } NetCharDriver;
2229
2230 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2231 {
2232 NetCharDriver *s = chr->opaque;
2233 gsize bytes_written;
2234 GIOStatus status;
2235
2236 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2237 if (status == G_IO_STATUS_EOF) {
2238 return 0;
2239 } else if (status != G_IO_STATUS_NORMAL) {
2240 return -1;
2241 }
2242
2243 return bytes_written;
2244 }
2245
2246 static int udp_chr_read_poll(void *opaque)
2247 {
2248 CharDriverState *chr = opaque;
2249 NetCharDriver *s = chr->opaque;
2250
2251 s->max_size = qemu_chr_be_can_write(chr);
2252
2253 /* If there were any stray characters in the queue process them
2254 * first
2255 */
2256 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2257 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2258 s->bufptr++;
2259 s->max_size = qemu_chr_be_can_write(chr);
2260 }
2261 return s->max_size;
2262 }
2263
2264 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2265 {
2266 CharDriverState *chr = opaque;
2267 NetCharDriver *s = chr->opaque;
2268 gsize bytes_read = 0;
2269 GIOStatus status;
2270
2271 if (s->max_size == 0) {
2272 return TRUE;
2273 }
2274 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2275 &bytes_read, NULL);
2276 s->bufcnt = bytes_read;
2277 s->bufptr = s->bufcnt;
2278 if (status != G_IO_STATUS_NORMAL) {
2279 if (s->tag) {
2280 io_remove_watch_poll(s->tag);
2281 s->tag = 0;
2282 }
2283 return FALSE;
2284 }
2285
2286 s->bufptr = 0;
2287 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2288 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2289 s->bufptr++;
2290 s->max_size = qemu_chr_be_can_write(chr);
2291 }
2292
2293 return TRUE;
2294 }
2295
2296 static void udp_chr_update_read_handler(CharDriverState *chr)
2297 {
2298 NetCharDriver *s = chr->opaque;
2299
2300 if (s->tag) {
2301 io_remove_watch_poll(s->tag);
2302 s->tag = 0;
2303 }
2304
2305 if (s->chan) {
2306 s->tag = io_add_watch_poll(s->chan, udp_chr_read_poll, udp_chr_read, chr);
2307 }
2308 }
2309
2310 static void udp_chr_close(CharDriverState *chr)
2311 {
2312 NetCharDriver *s = chr->opaque;
2313 if (s->tag) {
2314 io_remove_watch_poll(s->tag);
2315 s->tag = 0;
2316 }
2317 if (s->chan) {
2318 g_io_channel_unref(s->chan);
2319 closesocket(s->fd);
2320 }
2321 g_free(s);
2322 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2323 }
2324
2325 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2326 {
2327 CharDriverState *chr = NULL;
2328 NetCharDriver *s = NULL;
2329
2330 chr = g_malloc0(sizeof(CharDriverState));
2331 s = g_malloc0(sizeof(NetCharDriver));
2332
2333 s->fd = fd;
2334 s->chan = io_channel_from_socket(s->fd);
2335 s->bufcnt = 0;
2336 s->bufptr = 0;
2337 chr->opaque = s;
2338 chr->chr_write = udp_chr_write;
2339 chr->chr_update_read_handler = udp_chr_update_read_handler;
2340 chr->chr_close = udp_chr_close;
2341 return chr;
2342 }
2343
2344 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2345 {
2346 Error *local_err = NULL;
2347 int fd = -1;
2348
2349 fd = inet_dgram_opts(opts, &local_err);
2350 if (fd < 0) {
2351 return NULL;
2352 }
2353 return qemu_chr_open_udp_fd(fd);
2354 }
2355
2356 /***********************************************************/
2357 /* TCP Net console */
2358
2359 typedef struct {
2360
2361 GIOChannel *chan, *listen_chan;
2362 guint tag, listen_tag;
2363 int fd, listen_fd;
2364 int connected;
2365 int max_size;
2366 int do_telnetopt;
2367 int do_nodelay;
2368 int is_unix;
2369 int msgfd;
2370 } TCPCharDriver;
2371
2372 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2373
2374 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2375 {
2376 TCPCharDriver *s = chr->opaque;
2377 if (s->connected) {
2378 return io_channel_send(s->chan, buf, len);
2379 } else {
2380 /* XXX: indicate an error ? */
2381 return len;
2382 }
2383 }
2384
2385 static int tcp_chr_read_poll(void *opaque)
2386 {
2387 CharDriverState *chr = opaque;
2388 TCPCharDriver *s = chr->opaque;
2389 if (!s->connected)
2390 return 0;
2391 s->max_size = qemu_chr_be_can_write(chr);
2392 return s->max_size;
2393 }
2394
2395 #define IAC 255
2396 #define IAC_BREAK 243
2397 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2398 TCPCharDriver *s,
2399 uint8_t *buf, int *size)
2400 {
2401 /* Handle any telnet client's basic IAC options to satisfy char by
2402 * char mode with no echo. All IAC options will be removed from
2403 * the buf and the do_telnetopt variable will be used to track the
2404 * state of the width of the IAC information.
2405 *
2406 * IAC commands come in sets of 3 bytes with the exception of the
2407 * "IAC BREAK" command and the double IAC.
2408 */
2409
2410 int i;
2411 int j = 0;
2412
2413 for (i = 0; i < *size; i++) {
2414 if (s->do_telnetopt > 1) {
2415 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2416 /* Double IAC means send an IAC */
2417 if (j != i)
2418 buf[j] = buf[i];
2419 j++;
2420 s->do_telnetopt = 1;
2421 } else {
2422 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2423 /* Handle IAC break commands by sending a serial break */
2424 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2425 s->do_telnetopt++;
2426 }
2427 s->do_telnetopt++;
2428 }
2429 if (s->do_telnetopt >= 4) {
2430 s->do_telnetopt = 1;
2431 }
2432 } else {
2433 if ((unsigned char)buf[i] == IAC) {
2434 s->do_telnetopt = 2;
2435 } else {
2436 if (j != i)
2437 buf[j] = buf[i];
2438 j++;
2439 }
2440 }
2441 }
2442 *size = j;
2443 }
2444
2445 static int tcp_get_msgfd(CharDriverState *chr)
2446 {
2447 TCPCharDriver *s = chr->opaque;
2448 int fd = s->msgfd;
2449 s->msgfd = -1;
2450 return fd;
2451 }
2452
2453 #ifndef _WIN32
2454 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2455 {
2456 TCPCharDriver *s = chr->opaque;
2457 struct cmsghdr *cmsg;
2458
2459 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2460 int fd;
2461
2462 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2463 cmsg->cmsg_level != SOL_SOCKET ||
2464 cmsg->cmsg_type != SCM_RIGHTS)
2465 continue;
2466
2467 fd = *((int *)CMSG_DATA(cmsg));
2468 if (fd < 0)
2469 continue;
2470
2471 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2472 qemu_set_block(fd);
2473
2474 #ifndef MSG_CMSG_CLOEXEC
2475 qemu_set_cloexec(fd);
2476 #endif
2477 if (s->msgfd != -1)
2478 close(s->msgfd);
2479 s->msgfd = fd;
2480 }
2481 }
2482
2483 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2484 {
2485 TCPCharDriver *s = chr->opaque;
2486 struct msghdr msg = { NULL, };
2487 struct iovec iov[1];
2488 union {
2489 struct cmsghdr cmsg;
2490 char control[CMSG_SPACE(sizeof(int))];
2491 } msg_control;
2492 int flags = 0;
2493 ssize_t ret;
2494
2495 iov[0].iov_base = buf;
2496 iov[0].iov_len = len;
2497
2498 msg.msg_iov = iov;
2499 msg.msg_iovlen = 1;
2500 msg.msg_control = &msg_control;
2501 msg.msg_controllen = sizeof(msg_control);
2502
2503 #ifdef MSG_CMSG_CLOEXEC
2504 flags |= MSG_CMSG_CLOEXEC;
2505 #endif
2506 ret = recvmsg(s->fd, &msg, flags);
2507 if (ret > 0 && s->is_unix) {
2508 unix_process_msgfd(chr, &msg);
2509 }
2510
2511 return ret;
2512 }
2513 #else
2514 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2515 {
2516 TCPCharDriver *s = chr->opaque;
2517 return qemu_recv(s->fd, buf, len, 0);
2518 }
2519 #endif
2520
2521 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2522 {
2523 TCPCharDriver *s = chr->opaque;
2524 return g_io_create_watch(s->chan, cond);
2525 }
2526
2527 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2528 {
2529 CharDriverState *chr = opaque;
2530 TCPCharDriver *s = chr->opaque;
2531 uint8_t buf[READ_BUF_LEN];
2532 int len, size;
2533
2534 if (!s->connected || s->max_size <= 0) {
2535 return TRUE;
2536 }
2537 len = sizeof(buf);
2538 if (len > s->max_size)
2539 len = s->max_size;
2540 size = tcp_chr_recv(chr, (void *)buf, len);
2541 if (size == 0) {
2542 /* connection closed */
2543 s->connected = 0;
2544 if (s->listen_chan) {
2545 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2546 }
2547 if (s->tag) {
2548 io_remove_watch_poll(s->tag);
2549 s->tag = 0;
2550 }
2551 g_io_channel_unref(s->chan);
2552 s->chan = NULL;
2553 closesocket(s->fd);
2554 s->fd = -1;
2555 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2556 } else if (size > 0) {
2557 if (s->do_telnetopt)
2558 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2559 if (size > 0)
2560 qemu_chr_be_write(chr, buf, size);
2561 }
2562
2563 return TRUE;
2564 }
2565
2566 #ifndef _WIN32
2567 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2568 {
2569 return qemu_chr_open_fd(eventfd, eventfd);
2570 }
2571 #endif
2572
2573 static void tcp_chr_connect(void *opaque)
2574 {
2575 CharDriverState *chr = opaque;
2576 TCPCharDriver *s = chr->opaque;
2577
2578 s->connected = 1;
2579 if (s->chan) {
2580 s->tag = io_add_watch_poll(s->chan, tcp_chr_read_poll, tcp_chr_read, chr);
2581 }
2582 qemu_chr_be_generic_open(chr);
2583 }
2584
2585 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2586 static void tcp_chr_telnet_init(int fd)
2587 {
2588 char buf[3];
2589 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2590 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2591 send(fd, (char *)buf, 3, 0);
2592 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2593 send(fd, (char *)buf, 3, 0);
2594 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2595 send(fd, (char *)buf, 3, 0);
2596 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2597 send(fd, (char *)buf, 3, 0);
2598 }
2599
2600 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2601 {
2602 TCPCharDriver *s = chr->opaque;
2603 if (s->fd != -1)
2604 return -1;
2605
2606 qemu_set_nonblock(fd);
2607 if (s->do_nodelay)
2608 socket_set_nodelay(fd);
2609 s->fd = fd;
2610 s->chan = io_channel_from_socket(fd);
2611 if (s->listen_tag) {
2612 g_source_remove(s->listen_tag);
2613 s->listen_tag = 0;
2614 }
2615 tcp_chr_connect(chr);
2616
2617 return 0;
2618 }
2619
2620 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
2621 {
2622 CharDriverState *chr = opaque;
2623 TCPCharDriver *s = chr->opaque;
2624 struct sockaddr_in saddr;
2625 #ifndef _WIN32
2626 struct sockaddr_un uaddr;
2627 #endif
2628 struct sockaddr *addr;
2629 socklen_t len;
2630 int fd;
2631
2632 for(;;) {
2633 #ifndef _WIN32
2634 if (s->is_unix) {
2635 len = sizeof(uaddr);
2636 addr = (struct sockaddr *)&uaddr;
2637 } else
2638 #endif
2639 {
2640 len = sizeof(saddr);
2641 addr = (struct sockaddr *)&saddr;
2642 }
2643 fd = qemu_accept(s->listen_fd, addr, &len);
2644 if (fd < 0 && errno != EINTR) {
2645 return FALSE;
2646 } else if (fd >= 0) {
2647 if (s->do_telnetopt)
2648 tcp_chr_telnet_init(fd);
2649 break;
2650 }
2651 }
2652 if (tcp_chr_add_client(chr, fd) < 0)
2653 close(fd);
2654
2655 return TRUE;
2656 }
2657
2658 static void tcp_chr_close(CharDriverState *chr)
2659 {
2660 TCPCharDriver *s = chr->opaque;
2661 if (s->fd >= 0) {
2662 if (s->tag) {
2663 io_remove_watch_poll(s->tag);
2664 s->tag = 0;
2665 }
2666 if (s->chan) {
2667 g_io_channel_unref(s->chan);
2668 }
2669 closesocket(s->fd);
2670 }
2671 if (s->listen_fd >= 0) {
2672 if (s->listen_tag) {
2673 g_source_remove(s->listen_tag);
2674 s->listen_tag = 0;
2675 }
2676 if (s->listen_chan) {
2677 g_io_channel_unref(s->listen_chan);
2678 }
2679 closesocket(s->listen_fd);
2680 }
2681 g_free(s);
2682 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2683 }
2684
2685 static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
2686 bool is_listen, bool is_telnet,
2687 bool is_waitconnect,
2688 Error **errp)
2689 {
2690 CharDriverState *chr = NULL;
2691 TCPCharDriver *s = NULL;
2692 char host[NI_MAXHOST], serv[NI_MAXSERV];
2693 const char *left = "", *right = "";
2694 struct sockaddr_storage ss;
2695 socklen_t ss_len = sizeof(ss);
2696
2697 memset(&ss, 0, ss_len);
2698 if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2699 error_setg(errp, "getsockname: %s", strerror(errno));
2700 return NULL;
2701 }
2702
2703 chr = g_malloc0(sizeof(CharDriverState));
2704 s = g_malloc0(sizeof(TCPCharDriver));
2705
2706 s->connected = 0;
2707 s->fd = -1;
2708 s->listen_fd = -1;
2709 s->msgfd = -1;
2710
2711 chr->filename = g_malloc(256);
2712 switch (ss.ss_family) {
2713 #ifndef _WIN32
2714 case AF_UNIX:
2715 s->is_unix = 1;
2716 snprintf(chr->filename, 256, "unix:%s%s",
2717 ((struct sockaddr_un *)(&ss))->sun_path,
2718 is_listen ? ",server" : "");
2719 break;
2720 #endif
2721 case AF_INET6:
2722 left = "[";
2723 right = "]";
2724 /* fall through */
2725 case AF_INET:
2726 s->do_nodelay = do_nodelay;
2727 getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
2728 serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
2729 snprintf(chr->filename, 256, "%s:%s%s%s:%s%s",
2730 is_telnet ? "telnet" : "tcp",
2731 left, host, right, serv,
2732 is_listen ? ",server" : "");
2733 break;
2734 }
2735
2736 chr->opaque = s;
2737 chr->chr_write = tcp_chr_write;
2738 chr->chr_close = tcp_chr_close;
2739 chr->get_msgfd = tcp_get_msgfd;
2740 chr->chr_add_client = tcp_chr_add_client;
2741 chr->chr_add_watch = tcp_chr_add_watch;
2742
2743 if (is_listen) {
2744 s->listen_fd = fd;
2745 s->listen_chan = io_channel_from_socket(s->listen_fd);
2746 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2747 if (is_telnet) {
2748 s->do_telnetopt = 1;
2749 }
2750 } else {
2751 s->connected = 1;
2752 s->fd = fd;
2753 socket_set_nodelay(fd);
2754 s->chan = io_channel_from_socket(s->fd);
2755 tcp_chr_connect(chr);
2756 }
2757
2758 if (is_listen && is_waitconnect) {
2759 printf("QEMU waiting for connection on: %s\n",
2760 chr->filename);
2761 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
2762 qemu_set_nonblock(s->listen_fd);
2763 }
2764 return chr;
2765 }
2766
2767 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2768 {
2769 CharDriverState *chr = NULL;
2770 Error *local_err = NULL;
2771 int fd = -1;
2772 int is_listen;
2773 int is_waitconnect;
2774 int do_nodelay;
2775 int is_unix;
2776 int is_telnet;
2777
2778 is_listen = qemu_opt_get_bool(opts, "server", 0);
2779 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2780 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2781 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2782 is_unix = qemu_opt_get(opts, "path") != NULL;
2783 if (!is_listen)
2784 is_waitconnect = 0;
2785
2786 if (is_unix) {
2787 if (is_listen) {
2788 fd = unix_listen_opts(opts, &local_err);
2789 } else {
2790 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
2791 }
2792 } else {
2793 if (is_listen) {
2794 fd = inet_listen_opts(opts, 0, &local_err);
2795 } else {
2796 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
2797 }
2798 }
2799 if (fd < 0) {
2800 goto fail;
2801 }
2802
2803 if (!is_waitconnect)
2804 qemu_set_nonblock(fd);
2805
2806 chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet,
2807 is_waitconnect, &local_err);
2808 if (error_is_set(&local_err)) {
2809 goto fail;
2810 }
2811 return chr;
2812
2813
2814 fail:
2815 if (local_err) {
2816 qerror_report_err(local_err);
2817 error_free(local_err);
2818 }
2819 if (fd >= 0) {
2820 closesocket(fd);
2821 }
2822 if (chr) {
2823 g_free(chr->opaque);
2824 g_free(chr);
2825 }
2826 return NULL;
2827 }
2828
2829 /*********************************************************/
2830 /* Ring buffer chardev */
2831
2832 typedef struct {
2833 size_t size;
2834 size_t prod;
2835 size_t cons;
2836 uint8_t *cbuf;
2837 } RingBufCharDriver;
2838
2839 static size_t ringbuf_count(const CharDriverState *chr)
2840 {
2841 const RingBufCharDriver *d = chr->opaque;
2842
2843 return d->prod - d->cons;
2844 }
2845
2846 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2847 {
2848 RingBufCharDriver *d = chr->opaque;
2849 int i;
2850
2851 if (!buf || (len < 0)) {
2852 return -1;
2853 }
2854
2855 for (i = 0; i < len; i++ ) {
2856 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
2857 if (d->prod - d->cons > d->size) {
2858 d->cons = d->prod - d->size;
2859 }
2860 }
2861
2862 return 0;
2863 }
2864
2865 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
2866 {
2867 RingBufCharDriver *d = chr->opaque;
2868 int i;
2869
2870 for (i = 0; i < len && d->cons != d->prod; i++) {
2871 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
2872 }
2873
2874 return i;
2875 }
2876
2877 static void ringbuf_chr_close(struct CharDriverState *chr)
2878 {
2879 RingBufCharDriver *d = chr->opaque;
2880
2881 g_free(d->cbuf);
2882 g_free(d);
2883 chr->opaque = NULL;
2884 }
2885
2886 static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts,
2887 Error **errp)
2888 {
2889 CharDriverState *chr;
2890 RingBufCharDriver *d;
2891
2892 chr = g_malloc0(sizeof(CharDriverState));
2893 d = g_malloc(sizeof(*d));
2894
2895 d->size = opts->has_size ? opts->size : 65536;
2896
2897 /* The size must be power of 2 */
2898 if (d->size & (d->size - 1)) {
2899 error_setg(errp, "size of ringbuf chardev must be power of two");
2900 goto fail;
2901 }
2902
2903 d->prod = 0;
2904 d->cons = 0;
2905 d->cbuf = g_malloc0(d->size);
2906
2907 chr->opaque = d;
2908 chr->chr_write = ringbuf_chr_write;
2909 chr->chr_close = ringbuf_chr_close;
2910
2911 return chr;
2912
2913 fail:
2914 g_free(d);
2915 g_free(chr);
2916 return NULL;
2917 }
2918
2919 static bool chr_is_ringbuf(const CharDriverState *chr)
2920 {
2921 return chr->chr_write == ringbuf_chr_write;
2922 }
2923
2924 void qmp_ringbuf_write(const char *device, const char *data,
2925 bool has_format, enum DataFormat format,
2926 Error **errp)
2927 {
2928 CharDriverState *chr;
2929 const uint8_t *write_data;
2930 int ret;
2931 size_t write_count;
2932
2933 chr = qemu_chr_find(device);
2934 if (!chr) {
2935 error_setg(errp, "Device '%s' not found", device);
2936 return;
2937 }
2938
2939 if (!chr_is_ringbuf(chr)) {
2940 error_setg(errp,"%s is not a ringbuf device", device);
2941 return;
2942 }
2943
2944 if (has_format && (format == DATA_FORMAT_BASE64)) {
2945 write_data = g_base64_decode(data, &write_count);
2946 } else {
2947 write_data = (uint8_t *)data;
2948 write_count = strlen(data);
2949 }
2950
2951 ret = ringbuf_chr_write(chr, write_data, write_count);
2952
2953 if (write_data != (uint8_t *)data) {
2954 g_free((void *)write_data);
2955 }
2956
2957 if (ret < 0) {
2958 error_setg(errp, "Failed to write to device %s", device);
2959 return;
2960 }
2961 }
2962
2963 char *qmp_ringbuf_read(const char *device, int64_t size,
2964 bool has_format, enum DataFormat format,
2965 Error **errp)
2966 {
2967 CharDriverState *chr;
2968 uint8_t *read_data;
2969 size_t count;
2970 char *data;
2971
2972 chr = qemu_chr_find(device);
2973 if (!chr) {
2974 error_setg(errp, "Device '%s' not found", device);
2975 return NULL;
2976 }
2977
2978 if (!chr_is_ringbuf(chr)) {
2979 error_setg(errp,"%s is not a ringbuf device", device);
2980 return NULL;
2981 }
2982
2983 if (size <= 0) {
2984 error_setg(errp, "size must be greater than zero");
2985 return NULL;
2986 }
2987
2988 count = ringbuf_count(chr);
2989 size = size > count ? count : size;
2990 read_data = g_malloc(size + 1);
2991
2992 ringbuf_chr_read(chr, read_data, size);
2993
2994 if (has_format && (format == DATA_FORMAT_BASE64)) {
2995 data = g_base64_encode(read_data, size);
2996 g_free(read_data);
2997 } else {
2998 /*
2999 * FIXME should read only complete, valid UTF-8 characters up
3000 * to @size bytes. Invalid sequences should be replaced by a
3001 * suitable replacement character. Except when (and only
3002 * when) ring buffer lost characters since last read, initial
3003 * continuation characters should be dropped.
3004 */
3005 read_data[size] = 0;
3006 data = (char *)read_data;
3007 }
3008
3009 return data;
3010 }
3011
3012 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
3013 {
3014 char host[65], port[33], width[8], height[8];
3015 int pos;
3016 const char *p;
3017 QemuOpts *opts;
3018 Error *local_err = NULL;
3019
3020 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
3021 if (error_is_set(&local_err)) {
3022 qerror_report_err(local_err);
3023 error_free(local_err);
3024 return NULL;
3025 }
3026
3027 if (strstart(filename, "mon:", &p)) {
3028 filename = p;
3029 qemu_opt_set(opts, "mux", "on");
3030 }
3031
3032 if (strcmp(filename, "null") == 0 ||
3033 strcmp(filename, "pty") == 0 ||
3034 strcmp(filename, "msmouse") == 0 ||
3035 strcmp(filename, "braille") == 0 ||
3036 strcmp(filename, "stdio") == 0) {
3037 qemu_opt_set(opts, "backend", filename);
3038 return opts;
3039 }
3040 if (strstart(filename, "vc", &p)) {
3041 qemu_opt_set(opts, "backend", "vc");
3042 if (*p == ':') {
3043 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
3044 /* pixels */
3045 qemu_opt_set(opts, "width", width);
3046 qemu_opt_set(opts, "height", height);
3047 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
3048 /* chars */
3049 qemu_opt_set(opts, "cols", width);
3050 qemu_opt_set(opts, "rows", height);
3051 } else {
3052 goto fail;
3053 }
3054 }
3055 return opts;
3056 }
3057 if (strcmp(filename, "con:") == 0) {
3058 qemu_opt_set(opts, "backend", "console");
3059 return opts;
3060 }
3061 if (strstart(filename, "COM", NULL)) {
3062 qemu_opt_set(opts, "backend", "serial");
3063 qemu_opt_set(opts, "path", filename);
3064 return opts;
3065 }
3066 if (strstart(filename, "file:", &p)) {
3067 qemu_opt_set(opts, "backend", "file");
3068 qemu_opt_set(opts, "path", p);
3069 return opts;
3070 }
3071 if (strstart(filename, "pipe:", &p)) {
3072 qemu_opt_set(opts, "backend", "pipe");
3073 qemu_opt_set(opts, "path", p);
3074 return opts;
3075 }
3076 if (strstart(filename, "tcp:", &p) ||
3077 strstart(filename, "telnet:", &p)) {
3078 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3079 host[0] = 0;
3080 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3081 goto fail;
3082 }
3083 qemu_opt_set(opts, "backend", "socket");
3084 qemu_opt_set(opts, "host", host);
3085 qemu_opt_set(opts, "port", port);
3086 if (p[pos] == ',') {
3087 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
3088 goto fail;
3089 }
3090 if (strstart(filename, "telnet:", &p))
3091 qemu_opt_set(opts, "telnet", "on");
3092 return opts;
3093 }
3094 if (strstart(filename, "udp:", &p)) {
3095 qemu_opt_set(opts, "backend", "udp");
3096 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3097 host[0] = 0;
3098 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3099 goto fail;
3100 }
3101 }
3102 qemu_opt_set(opts, "host", host);
3103 qemu_opt_set(opts, "port", port);
3104 if (p[pos] == '@') {
3105 p += pos + 1;
3106 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3107 host[0] = 0;
3108 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3109 goto fail;
3110 }
3111 }
3112 qemu_opt_set(opts, "localaddr", host);
3113 qemu_opt_set(opts, "localport", port);
3114 }
3115 return opts;
3116 }
3117 if (strstart(filename, "unix:", &p)) {
3118 qemu_opt_set(opts, "backend", "socket");
3119 if (qemu_opts_do_parse(opts, p, "path") != 0)
3120 goto fail;
3121 return opts;
3122 }
3123 if (strstart(filename, "/dev/parport", NULL) ||
3124 strstart(filename, "/dev/ppi", NULL)) {
3125 qemu_opt_set(opts, "backend", "parport");
3126 qemu_opt_set(opts, "path", filename);
3127 return opts;
3128 }
3129 if (strstart(filename, "/dev/", NULL)) {
3130 qemu_opt_set(opts, "backend", "tty");
3131 qemu_opt_set(opts, "path", filename);
3132 return opts;
3133 }
3134
3135 fail:
3136 qemu_opts_del(opts);
3137 return NULL;
3138 }
3139
3140 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3141 Error **errp)
3142 {
3143 const char *path = qemu_opt_get(opts, "path");
3144
3145 if (path == NULL) {
3146 error_setg(errp, "chardev: file: no filename given");
3147 return;
3148 }
3149 backend->file = g_new0(ChardevFile, 1);
3150 backend->file->out = g_strdup(path);
3151 }
3152
3153 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3154 Error **errp)
3155 {
3156 backend->stdio = g_new0(ChardevStdio, 1);
3157 backend->stdio->has_signal = true;
3158 backend->stdio->signal =
3159 qemu_opt_get_bool(opts, "signal", display_type != DT_NOGRAPHIC);
3160 }
3161
3162 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3163 Error **errp)
3164 {
3165 const char *device = qemu_opt_get(opts, "path");
3166
3167 if (device == NULL) {
3168 error_setg(errp, "chardev: serial/tty: no device path given");
3169 return;
3170 }
3171 backend->serial = g_new0(ChardevHostdev, 1);
3172 backend->serial->device = g_strdup(device);
3173 }
3174
3175 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3176 Error **errp)
3177 {
3178 const char *device = qemu_opt_get(opts, "path");
3179
3180 if (device == NULL) {
3181 error_setg(errp, "chardev: parallel: no device path given");
3182 return;
3183 }
3184 backend->parallel = g_new0(ChardevHostdev, 1);
3185 backend->parallel->device = g_strdup(device);
3186 }
3187
3188 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3189 Error **errp)
3190 {
3191 const char *device = qemu_opt_get(opts, "path");
3192
3193 if (device == NULL) {
3194 error_setg(errp, "chardev: pipe: no device path given");
3195 return;
3196 }
3197 backend->pipe = g_new0(ChardevHostdev, 1);
3198 backend->pipe->device = g_strdup(device);
3199 }
3200
3201 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3202 Error **errp)
3203 {
3204 int val;
3205
3206 backend->memory = g_new0(ChardevRingbuf, 1);
3207
3208 val = qemu_opt_get_number(opts, "size", 0);
3209 if (val != 0) {
3210 backend->memory->has_size = true;
3211 backend->memory->size = val;
3212 }
3213 }
3214
3215 typedef struct CharDriver {
3216 const char *name;
3217 /* old, pre qapi */
3218 CharDriverState *(*open)(QemuOpts *opts);
3219 /* new, qapi-based */
3220 int kind;
3221 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3222 } CharDriver;
3223
3224 static GSList *backends;
3225
3226 void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *))
3227 {
3228 CharDriver *s;
3229
3230 s = g_malloc0(sizeof(*s));
3231 s->name = g_strdup(name);
3232 s->open = open;
3233
3234 backends = g_slist_append(backends, s);
3235 }
3236
3237 void register_char_driver_qapi(const char *name, int kind,
3238 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp))
3239 {
3240 CharDriver *s;
3241
3242 s = g_malloc0(sizeof(*s));
3243 s->name = g_strdup(name);
3244 s->kind = kind;
3245 s->parse = parse;
3246
3247 backends = g_slist_append(backends, s);
3248 }
3249
3250 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3251 void (*init)(struct CharDriverState *s),
3252 Error **errp)
3253 {
3254 CharDriver *cd;
3255 CharDriverState *chr;
3256 GSList *i;
3257
3258 if (qemu_opts_id(opts) == NULL) {
3259 error_setg(errp, "chardev: no id specified");
3260 goto err;
3261 }
3262
3263 if (qemu_opt_get(opts, "backend") == NULL) {
3264 error_setg(errp, "chardev: \"%s\" missing backend",
3265 qemu_opts_id(opts));
3266 goto err;
3267 }
3268 for (i = backends; i; i = i->next) {
3269 cd = i->data;
3270
3271 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3272 break;
3273 }
3274 }
3275 if (i == NULL) {
3276 error_setg(errp, "chardev: backend \"%s\" not found",
3277 qemu_opt_get(opts, "backend"));
3278 return NULL;
3279 }
3280
3281 if (!cd->open) {
3282 /* using new, qapi init */
3283 ChardevBackend *backend = g_new0(ChardevBackend, 1);
3284 ChardevReturn *ret = NULL;
3285 const char *id = qemu_opts_id(opts);
3286 const char *bid = NULL;
3287
3288 if (qemu_opt_get_bool(opts, "mux", 0)) {
3289 bid = g_strdup_printf("%s-base", id);
3290 }
3291
3292 chr = NULL;
3293 backend->kind = cd->kind;
3294 if (cd->parse) {
3295 cd->parse(opts, backend, errp);
3296 if (error_is_set(errp)) {
3297 goto qapi_out;
3298 }
3299 }
3300 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3301 if (error_is_set(errp)) {
3302 goto qapi_out;
3303 }
3304
3305 if (bid) {
3306 qapi_free_ChardevBackend(backend);
3307 qapi_free_ChardevReturn(ret);
3308 backend = g_new0(ChardevBackend, 1);
3309 backend->mux = g_new0(ChardevMux, 1);
3310 backend->kind = CHARDEV_BACKEND_KIND_MUX;
3311 backend->mux->chardev = g_strdup(bid);
3312 ret = qmp_chardev_add(id, backend, errp);
3313 if (error_is_set(errp)) {
3314 goto qapi_out;
3315 }
3316 }
3317
3318 chr = qemu_chr_find(id);
3319
3320 qapi_out:
3321 qapi_free_ChardevBackend(backend);
3322 qapi_free_ChardevReturn(ret);
3323 return chr;
3324 }
3325
3326 chr = cd->open(opts);
3327 if (!chr) {
3328 error_setg(errp, "chardev: opening backend \"%s\" failed",
3329 qemu_opt_get(opts, "backend"));
3330 goto err;
3331 }
3332
3333 if (!chr->filename)
3334 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
3335 chr->init = init;
3336 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3337
3338 if (qemu_opt_get_bool(opts, "mux", 0)) {
3339 CharDriverState *base = chr;
3340 int len = strlen(qemu_opts_id(opts)) + 6;
3341 base->label = g_malloc(len);
3342 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
3343 chr = qemu_chr_open_mux(base);
3344 chr->filename = base->filename;
3345 chr->avail_connections = MAX_MUX;
3346 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3347 } else {
3348 chr->avail_connections = 1;
3349 }
3350 chr->label = g_strdup(qemu_opts_id(opts));
3351 chr->opts = opts;
3352 return chr;
3353
3354 err:
3355 qemu_opts_del(opts);
3356 return NULL;
3357 }
3358
3359 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3360 {
3361 const char *p;
3362 CharDriverState *chr;
3363 QemuOpts *opts;
3364 Error *err = NULL;
3365
3366 if (strstart(filename, "chardev:", &p)) {
3367 return qemu_chr_find(p);
3368 }
3369
3370 opts = qemu_chr_parse_compat(label, filename);
3371 if (!opts)
3372 return NULL;
3373
3374 chr = qemu_chr_new_from_opts(opts, init, &err);
3375 if (error_is_set(&err)) {
3376 fprintf(stderr, "%s\n", error_get_pretty(err));
3377 error_free(err);
3378 }
3379 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3380 qemu_chr_fe_claim_no_fail(chr);
3381 monitor_init(chr, MONITOR_USE_READLINE);
3382 }
3383 return chr;
3384 }
3385
3386 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3387 {
3388 if (chr->chr_set_echo) {
3389 chr->chr_set_echo(chr, echo);
3390 }
3391 }
3392
3393 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
3394 {
3395 if (chr->fe_open == fe_open) {
3396 return;
3397 }
3398 chr->fe_open = fe_open;
3399 if (chr->chr_set_fe_open) {
3400 chr->chr_set_fe_open(chr, fe_open);
3401 }
3402 }
3403
3404 int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3405 GIOFunc func, void *user_data)
3406 {
3407 GSource *src;
3408 guint tag;
3409
3410 if (s->chr_add_watch == NULL) {
3411 return -ENOSYS;
3412 }
3413
3414 src = s->chr_add_watch(s, cond);
3415 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3416 tag = g_source_attach(src, NULL);
3417 g_source_unref(src);
3418
3419 return tag;
3420 }
3421
3422 int qemu_chr_fe_claim(CharDriverState *s)
3423 {
3424 if (s->avail_connections < 1) {
3425 return -1;
3426 }
3427 s->avail_connections--;
3428 return 0;
3429 }
3430
3431 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
3432 {
3433 if (qemu_chr_fe_claim(s) != 0) {
3434 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
3435 __func__, s->label);
3436 exit(1);
3437 }
3438 }
3439
3440 void qemu_chr_fe_release(CharDriverState *s)
3441 {
3442 s->avail_connections++;
3443 }
3444
3445 void qemu_chr_delete(CharDriverState *chr)
3446 {
3447 QTAILQ_REMOVE(&chardevs, chr, next);
3448 if (chr->chr_close) {
3449 chr->chr_close(chr);
3450 }
3451 g_free(chr->filename);
3452 g_free(chr->label);
3453 if (chr->opts) {
3454 qemu_opts_del(chr->opts);
3455 }
3456 g_free(chr);
3457 }
3458
3459 ChardevInfoList *qmp_query_chardev(Error **errp)
3460 {
3461 ChardevInfoList *chr_list = NULL;
3462 CharDriverState *chr;
3463
3464 QTAILQ_FOREACH(chr, &chardevs, next) {
3465 ChardevInfoList *info = g_malloc0(sizeof(*info));
3466 info->value = g_malloc0(sizeof(*info->value));
3467 info->value->label = g_strdup(chr->label);
3468 info->value->filename = g_strdup(chr->filename);
3469
3470 info->next = chr_list;
3471 chr_list = info;
3472 }
3473
3474 return chr_list;
3475 }
3476
3477 CharDriverState *qemu_chr_find(const char *name)
3478 {
3479 CharDriverState *chr;
3480
3481 QTAILQ_FOREACH(chr, &chardevs, next) {
3482 if (strcmp(chr->label, name) != 0)
3483 continue;
3484 return chr;
3485 }
3486 return NULL;
3487 }
3488
3489 /* Get a character (serial) device interface. */
3490 CharDriverState *qemu_char_get_next_serial(void)
3491 {
3492 static int next_serial;
3493 CharDriverState *chr;
3494
3495 /* FIXME: This function needs to go away: use chardev properties! */
3496
3497 while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
3498 chr = serial_hds[next_serial++];
3499 qemu_chr_fe_claim_no_fail(chr);
3500 return chr;
3501 }
3502 return NULL;
3503 }
3504
3505 QemuOptsList qemu_chardev_opts = {
3506 .name = "chardev",
3507 .implied_opt_name = "backend",
3508 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3509 .desc = {
3510 {
3511 .name = "backend",
3512 .type = QEMU_OPT_STRING,
3513 },{
3514 .name = "path",
3515 .type = QEMU_OPT_STRING,
3516 },{
3517 .name = "host",
3518 .type = QEMU_OPT_STRING,
3519 },{
3520 .name = "port",
3521 .type = QEMU_OPT_STRING,
3522 },{
3523 .name = "localaddr",
3524 .type = QEMU_OPT_STRING,
3525 },{
3526 .name = "localport",
3527 .type = QEMU_OPT_STRING,
3528 },{
3529 .name = "to",
3530 .type = QEMU_OPT_NUMBER,
3531 },{
3532 .name = "ipv4",
3533 .type = QEMU_OPT_BOOL,
3534 },{
3535 .name = "ipv6",
3536 .type = QEMU_OPT_BOOL,
3537 },{
3538 .name = "wait",
3539 .type = QEMU_OPT_BOOL,
3540 },{
3541 .name = "server",
3542 .type = QEMU_OPT_BOOL,
3543 },{
3544 .name = "delay",
3545 .type = QEMU_OPT_BOOL,
3546 },{
3547 .name = "telnet",
3548 .type = QEMU_OPT_BOOL,
3549 },{
3550 .name = "width",
3551 .type = QEMU_OPT_NUMBER,
3552 },{
3553 .name = "height",
3554 .type = QEMU_OPT_NUMBER,
3555 },{
3556 .name = "cols",
3557 .type = QEMU_OPT_NUMBER,
3558 },{
3559 .name = "rows",
3560 .type = QEMU_OPT_NUMBER,
3561 },{
3562 .name = "mux",
3563 .type = QEMU_OPT_BOOL,
3564 },{
3565 .name = "signal",
3566 .type = QEMU_OPT_BOOL,
3567 },{
3568 .name = "name",
3569 .type = QEMU_OPT_STRING,
3570 },{
3571 .name = "debug",
3572 .type = QEMU_OPT_NUMBER,
3573 },{
3574 .name = "size",
3575 .type = QEMU_OPT_SIZE,
3576 },
3577 { /* end of list */ }
3578 },
3579 };
3580
3581 #ifdef _WIN32
3582
3583 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3584 {
3585 HANDLE out;
3586
3587 if (file->in) {
3588 error_setg(errp, "input file not supported");
3589 return NULL;
3590 }
3591
3592 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
3593 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
3594 if (out == INVALID_HANDLE_VALUE) {
3595 error_setg(errp, "open %s failed", file->out);
3596 return NULL;
3597 }
3598 return qemu_chr_open_win_file(out);
3599 }
3600
3601 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3602 Error **errp)
3603 {
3604 return qemu_chr_open_win_path(serial->device);
3605 }
3606
3607 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3608 Error **errp)
3609 {
3610 error_setg(errp, "character device backend type 'parallel' not supported");
3611 return NULL;
3612 }
3613
3614 #else /* WIN32 */
3615
3616 static int qmp_chardev_open_file_source(char *src, int flags,
3617 Error **errp)
3618 {
3619 int fd = -1;
3620
3621 TFR(fd = qemu_open(src, flags, 0666));
3622 if (fd == -1) {
3623 error_setg(errp, "open %s: %s", src, strerror(errno));
3624 }
3625 return fd;
3626 }
3627
3628 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3629 {
3630 int flags, in = -1, out = -1;
3631
3632 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
3633 out = qmp_chardev_open_file_source(file->out, flags, errp);
3634 if (error_is_set(errp)) {
3635 return NULL;
3636 }
3637
3638 if (file->in) {
3639 flags = O_RDONLY;
3640 in = qmp_chardev_open_file_source(file->in, flags, errp);
3641 if (error_is_set(errp)) {
3642 qemu_close(out);
3643 return NULL;
3644 }
3645 }
3646
3647 return qemu_chr_open_fd(in, out);
3648 }
3649
3650 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3651 Error **errp)
3652 {
3653 #ifdef HAVE_CHARDEV_TTY
3654 int fd;
3655
3656 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
3657 if (error_is_set(errp)) {
3658 return NULL;
3659 }
3660 qemu_set_nonblock(fd);
3661 return qemu_chr_open_tty_fd(fd);
3662 #else
3663 error_setg(errp, "character device backend type 'serial' not supported");
3664 return NULL;
3665 #endif
3666 }
3667
3668 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3669 Error **errp)
3670 {
3671 #ifdef HAVE_CHARDEV_PARPORT
3672 int fd;
3673
3674 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
3675 if (error_is_set(errp)) {
3676 return NULL;
3677 }
3678 return qemu_chr_open_pp_fd(fd);
3679 #else
3680 error_setg(errp, "character device backend type 'parallel' not supported");
3681 return NULL;
3682 #endif
3683 }
3684
3685 #endif /* WIN32 */
3686
3687 static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
3688 Error **errp)
3689 {
3690 SocketAddress *addr = sock->addr;
3691 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
3692 bool is_listen = sock->has_server ? sock->server : true;
3693 bool is_telnet = sock->has_telnet ? sock->telnet : false;
3694 bool is_waitconnect = sock->has_wait ? sock->wait : false;
3695 int fd;
3696
3697 if (is_listen) {
3698 fd = socket_listen(addr, errp);
3699 } else {
3700 fd = socket_connect(addr, errp, NULL, NULL);
3701 }
3702 if (error_is_set(errp)) {
3703 return NULL;
3704 }
3705 return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
3706 is_telnet, is_waitconnect, errp);
3707 }
3708
3709 static CharDriverState *qmp_chardev_open_dgram(ChardevDgram *dgram,
3710 Error **errp)
3711 {
3712 int fd;
3713
3714 fd = socket_dgram(dgram->remote, dgram->local, errp);
3715 if (error_is_set(errp)) {
3716 return NULL;
3717 }
3718 return qemu_chr_open_udp_fd(fd);
3719 }
3720
3721 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
3722 Error **errp)
3723 {
3724 ChardevReturn *ret = g_new0(ChardevReturn, 1);
3725 CharDriverState *base, *chr = NULL;
3726
3727 chr = qemu_chr_find(id);
3728 if (chr) {
3729 error_setg(errp, "Chardev '%s' already exists", id);
3730 g_free(ret);
3731 return NULL;
3732 }
3733
3734 switch (backend->kind) {
3735 case CHARDEV_BACKEND_KIND_FILE:
3736 chr = qmp_chardev_open_file(backend->file, errp);
3737 break;
3738 case CHARDEV_BACKEND_KIND_SERIAL:
3739 chr = qmp_chardev_open_serial(backend->serial, errp);
3740 break;
3741 case CHARDEV_BACKEND_KIND_PARALLEL:
3742 chr = qmp_chardev_open_parallel(backend->parallel, errp);
3743 break;
3744 case CHARDEV_BACKEND_KIND_PIPE:
3745 chr = qemu_chr_open_pipe(backend->pipe);
3746 break;
3747 case CHARDEV_BACKEND_KIND_SOCKET:
3748 chr = qmp_chardev_open_socket(backend->socket, errp);
3749 break;
3750 case CHARDEV_BACKEND_KIND_DGRAM:
3751 chr = qmp_chardev_open_dgram(backend->dgram, errp);
3752 break;
3753 #ifdef HAVE_CHARDEV_TTY
3754 case CHARDEV_BACKEND_KIND_PTY:
3755 chr = qemu_chr_open_pty(id, ret);
3756 break;
3757 #endif
3758 case CHARDEV_BACKEND_KIND_NULL:
3759 chr = qemu_chr_open_null();
3760 break;
3761 case CHARDEV_BACKEND_KIND_MUX:
3762 base = qemu_chr_find(backend->mux->chardev);
3763 if (base == NULL) {
3764 error_setg(errp, "mux: base chardev %s not found",
3765 backend->mux->chardev);
3766 break;
3767 }
3768 chr = qemu_chr_open_mux(base);
3769 break;
3770 case CHARDEV_BACKEND_KIND_MSMOUSE:
3771 chr = qemu_chr_open_msmouse();
3772 break;
3773 #ifdef CONFIG_BRLAPI
3774 case CHARDEV_BACKEND_KIND_BRAILLE:
3775 chr = chr_baum_init();
3776 break;
3777 #endif
3778 case CHARDEV_BACKEND_KIND_STDIO:
3779 chr = qemu_chr_open_stdio(backend->stdio);
3780 break;
3781 #ifdef _WIN32
3782 case CHARDEV_BACKEND_KIND_CONSOLE:
3783 chr = qemu_chr_open_win_con();
3784 break;
3785 #endif
3786 #ifdef CONFIG_SPICE
3787 case CHARDEV_BACKEND_KIND_SPICEVMC:
3788 chr = qemu_chr_open_spice_vmc(backend->spicevmc->type);
3789 break;
3790 case CHARDEV_BACKEND_KIND_SPICEPORT:
3791 chr = qemu_chr_open_spice_port(backend->spiceport->fqdn);
3792 break;
3793 #endif
3794 case CHARDEV_BACKEND_KIND_VC:
3795 chr = vc_init(backend->vc);
3796 break;
3797 case CHARDEV_BACKEND_KIND_MEMORY:
3798 chr = qemu_chr_open_ringbuf(backend->memory, errp);
3799 break;
3800 default:
3801 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
3802 break;
3803 }
3804
3805 if (chr == NULL && !error_is_set(errp)) {
3806 error_setg(errp, "Failed to create chardev");
3807 }
3808 if (chr) {
3809 chr->label = g_strdup(id);
3810 chr->avail_connections =
3811 (backend->kind == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
3812 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3813 return ret;
3814 } else {
3815 g_free(ret);
3816 return NULL;
3817 }
3818 }
3819
3820 void qmp_chardev_remove(const char *id, Error **errp)
3821 {
3822 CharDriverState *chr;
3823
3824 chr = qemu_chr_find(id);
3825 if (NULL == chr) {
3826 error_setg(errp, "Chardev '%s' not found", id);
3827 return;
3828 }
3829 if (chr->chr_can_read || chr->chr_read ||
3830 chr->chr_event || chr->handler_opaque) {
3831 error_setg(errp, "Chardev '%s' is busy", id);
3832 return;
3833 }
3834 qemu_chr_delete(chr);
3835 }
3836
3837 static void register_types(void)
3838 {
3839 register_char_driver_qapi("null", CHARDEV_BACKEND_KIND_NULL, NULL);
3840 register_char_driver("socket", qemu_chr_open_socket);
3841 register_char_driver("udp", qemu_chr_open_udp);
3842 register_char_driver_qapi("memory", CHARDEV_BACKEND_KIND_MEMORY,
3843 qemu_chr_parse_ringbuf);
3844 register_char_driver_qapi("file", CHARDEV_BACKEND_KIND_FILE,
3845 qemu_chr_parse_file_out);
3846 register_char_driver_qapi("stdio", CHARDEV_BACKEND_KIND_STDIO,
3847 qemu_chr_parse_stdio);
3848 register_char_driver_qapi("serial", CHARDEV_BACKEND_KIND_SERIAL,
3849 qemu_chr_parse_serial);
3850 register_char_driver_qapi("tty", CHARDEV_BACKEND_KIND_SERIAL,
3851 qemu_chr_parse_serial);
3852 register_char_driver_qapi("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
3853 qemu_chr_parse_parallel);
3854 register_char_driver_qapi("parport", CHARDEV_BACKEND_KIND_PARALLEL,
3855 qemu_chr_parse_parallel);
3856 register_char_driver_qapi("pty", CHARDEV_BACKEND_KIND_PTY, NULL);
3857 register_char_driver_qapi("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL);
3858 register_char_driver_qapi("pipe", CHARDEV_BACKEND_KIND_PIPE,
3859 qemu_chr_parse_pipe);
3860 }
3861
3862 type_init(register_types);
QEmu