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block: initial VHDX driver support framework - supports open and probe
[qemu-kvm.git] / qemu-char.c
blob64e824d0acb1a0f773060b45c9b5f7eea0f43b93
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 s->timer_tag = 0;
1081 return FALSE;
1082 }
1083
1084 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1085 {
1086 PtyCharDriver *s = chr->opaque;
1087
1088 if (s->timer_tag) {
1089 g_source_remove(s->timer_tag);
1090 s->timer_tag = 0;
1091 }
1092
1093 if (ms == 1000) {
1094 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1095 } else {
1096 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1097 }
1098 }
1099
1100 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1101 {
1102 PtyCharDriver *s = chr->opaque;
1103
1104 if (!s->connected) {
1105 /* guest sends data, check for (re-)connect */
1106 pty_chr_update_read_handler(chr);
1107 return 0;
1108 }
1109 return io_channel_send(s->fd, buf, len);
1110 }
1111
1112 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1113 {
1114 PtyCharDriver *s = chr->opaque;
1115 return g_io_create_watch(s->fd, cond);
1116 }
1117
1118 static int pty_chr_read_poll(void *opaque)
1119 {
1120 CharDriverState *chr = opaque;
1121 PtyCharDriver *s = chr->opaque;
1122
1123 s->read_bytes = qemu_chr_be_can_write(chr);
1124 return s->read_bytes;
1125 }
1126
1127 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1128 {
1129 CharDriverState *chr = opaque;
1130 PtyCharDriver *s = chr->opaque;
1131 gsize size, len;
1132 uint8_t buf[READ_BUF_LEN];
1133 GIOStatus status;
1134
1135 len = sizeof(buf);
1136 if (len > s->read_bytes)
1137 len = s->read_bytes;
1138 if (len == 0) {
1139 return TRUE;
1140 }
1141 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1142 if (status != G_IO_STATUS_NORMAL) {
1143 pty_chr_state(chr, 0);
1144 return FALSE;
1145 } else {
1146 pty_chr_state(chr, 1);
1147 qemu_chr_be_write(chr, buf, size);
1148 }
1149 return TRUE;
1150 }
1151
1152 static void pty_chr_update_read_handler(CharDriverState *chr)
1153 {
1154 PtyCharDriver *s = chr->opaque;
1155 GPollFD pfd;
1156
1157 pfd.fd = g_io_channel_unix_get_fd(s->fd);
1158 pfd.events = G_IO_OUT;
1159 pfd.revents = 0;
1160 g_poll(&pfd, 1, 0);
1161 if (pfd.revents & G_IO_HUP) {
1162 pty_chr_state(chr, 0);
1163 } else {
1164 pty_chr_state(chr, 1);
1165 }
1166 }
1167
1168 static void pty_chr_state(CharDriverState *chr, int connected)
1169 {
1170 PtyCharDriver *s = chr->opaque;
1171
1172 if (!connected) {
1173 if (s->fd_tag) {
1174 io_remove_watch_poll(s->fd_tag);
1175 s->fd_tag = 0;
1176 }
1177 s->connected = 0;
1178 /* (re-)connect poll interval for idle guests: once per second.
1179 * We check more frequently in case the guests sends data to
1180 * the virtual device linked to our pty. */
1181 pty_chr_rearm_timer(chr, 1000);
1182 } else {
1183 if (s->timer_tag) {
1184 g_source_remove(s->timer_tag);
1185 s->timer_tag = 0;
1186 }
1187 if (!s->connected) {
1188 qemu_chr_be_generic_open(chr);
1189 s->connected = 1;
1190 s->fd_tag = io_add_watch_poll(s->fd, pty_chr_read_poll, pty_chr_read, chr);
1191 }
1192 }
1193 }
1194
1195
1196 static void pty_chr_close(struct CharDriverState *chr)
1197 {
1198 PtyCharDriver *s = chr->opaque;
1199 int fd;
1200
1201 if (s->fd_tag) {
1202 io_remove_watch_poll(s->fd_tag);
1203 s->fd_tag = 0;
1204 }
1205 fd = g_io_channel_unix_get_fd(s->fd);
1206 g_io_channel_unref(s->fd);
1207 close(fd);
1208 if (s->timer_tag) {
1209 g_source_remove(s->timer_tag);
1210 s->timer_tag = 0;
1211 }
1212 g_free(s);
1213 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1214 }
1215
1216 static CharDriverState *qemu_chr_open_pty(const char *id,
1217 ChardevReturn *ret)
1218 {
1219 CharDriverState *chr;
1220 PtyCharDriver *s;
1221 struct termios tty;
1222 int master_fd, slave_fd;
1223 #if defined(__OpenBSD__) || defined(__DragonFly__)
1224 char pty_name[PATH_MAX];
1225 #define q_ptsname(x) pty_name
1226 #else
1227 char *pty_name = NULL;
1228 #define q_ptsname(x) ptsname(x)
1229 #endif
1230
1231 if (openpty(&master_fd, &slave_fd, pty_name, NULL, NULL) < 0) {
1232 return NULL;
1233 }
1234
1235 /* Set raw attributes on the pty. */
1236 tcgetattr(slave_fd, &tty);
1237 cfmakeraw(&tty);
1238 tcsetattr(slave_fd, TCSAFLUSH, &tty);
1239 close(slave_fd);
1240
1241 chr = g_malloc0(sizeof(CharDriverState));
1242
1243 chr->filename = g_strdup_printf("pty:%s", q_ptsname(master_fd));
1244 ret->pty = g_strdup(q_ptsname(master_fd));
1245 ret->has_pty = true;
1246
1247 fprintf(stderr, "char device redirected to %s (label %s)\n",
1248 q_ptsname(master_fd), id);
1249
1250 s = g_malloc0(sizeof(PtyCharDriver));
1251 chr->opaque = s;
1252 chr->chr_write = pty_chr_write;
1253 chr->chr_update_read_handler = pty_chr_update_read_handler;
1254 chr->chr_close = pty_chr_close;
1255 chr->chr_add_watch = pty_chr_add_watch;
1256
1257 s->fd = io_channel_from_fd(master_fd);
1258 s->timer_tag = 0;
1259
1260 return chr;
1261 }
1262
1263 static void tty_serial_init(int fd, int speed,
1264 int parity, int data_bits, int stop_bits)
1265 {
1266 struct termios tty;
1267 speed_t spd;
1268
1269 #if 0
1270 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1271 speed, parity, data_bits, stop_bits);
1272 #endif
1273 tcgetattr (fd, &tty);
1274
1275 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1276 speed = speed * 10 / 11;
1277 do {
1278 check_speed(50);
1279 check_speed(75);
1280 check_speed(110);
1281 check_speed(134);
1282 check_speed(150);
1283 check_speed(200);
1284 check_speed(300);
1285 check_speed(600);
1286 check_speed(1200);
1287 check_speed(1800);
1288 check_speed(2400);
1289 check_speed(4800);
1290 check_speed(9600);
1291 check_speed(19200);
1292 check_speed(38400);
1293 /* Non-Posix values follow. They may be unsupported on some systems. */
1294 check_speed(57600);
1295 check_speed(115200);
1296 #ifdef B230400
1297 check_speed(230400);
1298 #endif
1299 #ifdef B460800
1300 check_speed(460800);
1301 #endif
1302 #ifdef B500000
1303 check_speed(500000);
1304 #endif
1305 #ifdef B576000
1306 check_speed(576000);
1307 #endif
1308 #ifdef B921600
1309 check_speed(921600);
1310 #endif
1311 #ifdef B1000000
1312 check_speed(1000000);
1313 #endif
1314 #ifdef B1152000
1315 check_speed(1152000);
1316 #endif
1317 #ifdef B1500000
1318 check_speed(1500000);
1319 #endif
1320 #ifdef B2000000
1321 check_speed(2000000);
1322 #endif
1323 #ifdef B2500000
1324 check_speed(2500000);
1325 #endif
1326 #ifdef B3000000
1327 check_speed(3000000);
1328 #endif
1329 #ifdef B3500000
1330 check_speed(3500000);
1331 #endif
1332 #ifdef B4000000
1333 check_speed(4000000);
1334 #endif
1335 spd = B115200;
1336 } while (0);
1337
1338 cfsetispeed(&tty, spd);
1339 cfsetospeed(&tty, spd);
1340
1341 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1342 |INLCR|IGNCR|ICRNL|IXON);
1343 tty.c_oflag |= OPOST;
1344 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1345 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1346 switch(data_bits) {
1347 default:
1348 case 8:
1349 tty.c_cflag |= CS8;
1350 break;
1351 case 7:
1352 tty.c_cflag |= CS7;
1353 break;
1354 case 6:
1355 tty.c_cflag |= CS6;
1356 break;
1357 case 5:
1358 tty.c_cflag |= CS5;
1359 break;
1360 }
1361 switch(parity) {
1362 default:
1363 case 'N':
1364 break;
1365 case 'E':
1366 tty.c_cflag |= PARENB;
1367 break;
1368 case 'O':
1369 tty.c_cflag |= PARENB | PARODD;
1370 break;
1371 }
1372 if (stop_bits == 2)
1373 tty.c_cflag |= CSTOPB;
1374
1375 tcsetattr (fd, TCSANOW, &tty);
1376 }
1377
1378 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1379 {
1380 FDCharDriver *s = chr->opaque;
1381
1382 switch(cmd) {
1383 case CHR_IOCTL_SERIAL_SET_PARAMS:
1384 {
1385 QEMUSerialSetParams *ssp = arg;
1386 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1387 ssp->speed, ssp->parity,
1388 ssp->data_bits, ssp->stop_bits);
1389 }
1390 break;
1391 case CHR_IOCTL_SERIAL_SET_BREAK:
1392 {
1393 int enable = *(int *)arg;
1394 if (enable) {
1395 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1396 }
1397 }
1398 break;
1399 case CHR_IOCTL_SERIAL_GET_TIOCM:
1400 {
1401 int sarg = 0;
1402 int *targ = (int *)arg;
1403 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1404 *targ = 0;
1405 if (sarg & TIOCM_CTS)
1406 *targ |= CHR_TIOCM_CTS;
1407 if (sarg & TIOCM_CAR)
1408 *targ |= CHR_TIOCM_CAR;
1409 if (sarg & TIOCM_DSR)
1410 *targ |= CHR_TIOCM_DSR;
1411 if (sarg & TIOCM_RI)
1412 *targ |= CHR_TIOCM_RI;
1413 if (sarg & TIOCM_DTR)
1414 *targ |= CHR_TIOCM_DTR;
1415 if (sarg & TIOCM_RTS)
1416 *targ |= CHR_TIOCM_RTS;
1417 }
1418 break;
1419 case CHR_IOCTL_SERIAL_SET_TIOCM:
1420 {
1421 int sarg = *(int *)arg;
1422 int targ = 0;
1423 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1424 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1425 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1426 if (sarg & CHR_TIOCM_CTS)
1427 targ |= TIOCM_CTS;
1428 if (sarg & CHR_TIOCM_CAR)
1429 targ |= TIOCM_CAR;
1430 if (sarg & CHR_TIOCM_DSR)
1431 targ |= TIOCM_DSR;
1432 if (sarg & CHR_TIOCM_RI)
1433 targ |= TIOCM_RI;
1434 if (sarg & CHR_TIOCM_DTR)
1435 targ |= TIOCM_DTR;
1436 if (sarg & CHR_TIOCM_RTS)
1437 targ |= TIOCM_RTS;
1438 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1439 }
1440 break;
1441 default:
1442 return -ENOTSUP;
1443 }
1444 return 0;
1445 }
1446
1447 static void qemu_chr_close_tty(CharDriverState *chr)
1448 {
1449 FDCharDriver *s = chr->opaque;
1450 int fd = -1;
1451
1452 if (s) {
1453 fd = g_io_channel_unix_get_fd(s->fd_in);
1454 }
1455
1456 fd_chr_close(chr);
1457
1458 if (fd >= 0) {
1459 close(fd);
1460 }
1461 }
1462
1463 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1464 {
1465 CharDriverState *chr;
1466
1467 tty_serial_init(fd, 115200, 'N', 8, 1);
1468 chr = qemu_chr_open_fd(fd, fd);
1469 chr->chr_ioctl = tty_serial_ioctl;
1470 chr->chr_close = qemu_chr_close_tty;
1471 return chr;
1472 }
1473 #endif /* __linux__ || __sun__ */
1474
1475 #if defined(__linux__)
1476
1477 #define HAVE_CHARDEV_PARPORT 1
1478
1479 typedef struct {
1480 int fd;
1481 int mode;
1482 } ParallelCharDriver;
1483
1484 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1485 {
1486 if (s->mode != mode) {
1487 int m = mode;
1488 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1489 return 0;
1490 s->mode = mode;
1491 }
1492 return 1;
1493 }
1494
1495 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1496 {
1497 ParallelCharDriver *drv = chr->opaque;
1498 int fd = drv->fd;
1499 uint8_t b;
1500
1501 switch(cmd) {
1502 case CHR_IOCTL_PP_READ_DATA:
1503 if (ioctl(fd, PPRDATA, &b) < 0)
1504 return -ENOTSUP;
1505 *(uint8_t *)arg = b;
1506 break;
1507 case CHR_IOCTL_PP_WRITE_DATA:
1508 b = *(uint8_t *)arg;
1509 if (ioctl(fd, PPWDATA, &b) < 0)
1510 return -ENOTSUP;
1511 break;
1512 case CHR_IOCTL_PP_READ_CONTROL:
1513 if (ioctl(fd, PPRCONTROL, &b) < 0)
1514 return -ENOTSUP;
1515 /* Linux gives only the lowest bits, and no way to know data
1516 direction! For better compatibility set the fixed upper
1517 bits. */
1518 *(uint8_t *)arg = b | 0xc0;
1519 break;
1520 case CHR_IOCTL_PP_WRITE_CONTROL:
1521 b = *(uint8_t *)arg;
1522 if (ioctl(fd, PPWCONTROL, &b) < 0)
1523 return -ENOTSUP;
1524 break;
1525 case CHR_IOCTL_PP_READ_STATUS:
1526 if (ioctl(fd, PPRSTATUS, &b) < 0)
1527 return -ENOTSUP;
1528 *(uint8_t *)arg = b;
1529 break;
1530 case CHR_IOCTL_PP_DATA_DIR:
1531 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1532 return -ENOTSUP;
1533 break;
1534 case CHR_IOCTL_PP_EPP_READ_ADDR:
1535 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1536 struct ParallelIOArg *parg = arg;
1537 int n = read(fd, parg->buffer, parg->count);
1538 if (n != parg->count) {
1539 return -EIO;
1540 }
1541 }
1542 break;
1543 case CHR_IOCTL_PP_EPP_READ:
1544 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1545 struct ParallelIOArg *parg = arg;
1546 int n = read(fd, parg->buffer, parg->count);
1547 if (n != parg->count) {
1548 return -EIO;
1549 }
1550 }
1551 break;
1552 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1553 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1554 struct ParallelIOArg *parg = arg;
1555 int n = write(fd, parg->buffer, parg->count);
1556 if (n != parg->count) {
1557 return -EIO;
1558 }
1559 }
1560 break;
1561 case CHR_IOCTL_PP_EPP_WRITE:
1562 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1563 struct ParallelIOArg *parg = arg;
1564 int n = write(fd, parg->buffer, parg->count);
1565 if (n != parg->count) {
1566 return -EIO;
1567 }
1568 }
1569 break;
1570 default:
1571 return -ENOTSUP;
1572 }
1573 return 0;
1574 }
1575
1576 static void pp_close(CharDriverState *chr)
1577 {
1578 ParallelCharDriver *drv = chr->opaque;
1579 int fd = drv->fd;
1580
1581 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1582 ioctl(fd, PPRELEASE);
1583 close(fd);
1584 g_free(drv);
1585 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1586 }
1587
1588 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1589 {
1590 CharDriverState *chr;
1591 ParallelCharDriver *drv;
1592
1593 if (ioctl(fd, PPCLAIM) < 0) {
1594 close(fd);
1595 return NULL;
1596 }
1597
1598 drv = g_malloc0(sizeof(ParallelCharDriver));
1599 drv->fd = fd;
1600 drv->mode = IEEE1284_MODE_COMPAT;
1601
1602 chr = g_malloc0(sizeof(CharDriverState));
1603 chr->chr_write = null_chr_write;
1604 chr->chr_ioctl = pp_ioctl;
1605 chr->chr_close = pp_close;
1606 chr->opaque = drv;
1607
1608 qemu_chr_be_generic_open(chr);
1609
1610 return chr;
1611 }
1612 #endif /* __linux__ */
1613
1614 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1615
1616 #define HAVE_CHARDEV_PARPORT 1
1617
1618 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1619 {
1620 int fd = (int)(intptr_t)chr->opaque;
1621 uint8_t b;
1622
1623 switch(cmd) {
1624 case CHR_IOCTL_PP_READ_DATA:
1625 if (ioctl(fd, PPIGDATA, &b) < 0)
1626 return -ENOTSUP;
1627 *(uint8_t *)arg = b;
1628 break;
1629 case CHR_IOCTL_PP_WRITE_DATA:
1630 b = *(uint8_t *)arg;
1631 if (ioctl(fd, PPISDATA, &b) < 0)
1632 return -ENOTSUP;
1633 break;
1634 case CHR_IOCTL_PP_READ_CONTROL:
1635 if (ioctl(fd, PPIGCTRL, &b) < 0)
1636 return -ENOTSUP;
1637 *(uint8_t *)arg = b;
1638 break;
1639 case CHR_IOCTL_PP_WRITE_CONTROL:
1640 b = *(uint8_t *)arg;
1641 if (ioctl(fd, PPISCTRL, &b) < 0)
1642 return -ENOTSUP;
1643 break;
1644 case CHR_IOCTL_PP_READ_STATUS:
1645 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1646 return -ENOTSUP;
1647 *(uint8_t *)arg = b;
1648 break;
1649 default:
1650 return -ENOTSUP;
1651 }
1652 return 0;
1653 }
1654
1655 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1656 {
1657 CharDriverState *chr;
1658
1659 chr = g_malloc0(sizeof(CharDriverState));
1660 chr->opaque = (void *)(intptr_t)fd;
1661 chr->chr_write = null_chr_write;
1662 chr->chr_ioctl = pp_ioctl;
1663 return chr;
1664 }
1665 #endif
1666
1667 #else /* _WIN32 */
1668
1669 typedef struct {
1670 int max_size;
1671 HANDLE hcom, hrecv, hsend;
1672 OVERLAPPED orecv, osend;
1673 BOOL fpipe;
1674 DWORD len;
1675 } WinCharState;
1676
1677 typedef struct {
1678 HANDLE hStdIn;
1679 HANDLE hInputReadyEvent;
1680 HANDLE hInputDoneEvent;
1681 HANDLE hInputThread;
1682 uint8_t win_stdio_buf;
1683 } WinStdioCharState;
1684
1685 #define NSENDBUF 2048
1686 #define NRECVBUF 2048
1687 #define MAXCONNECT 1
1688 #define NTIMEOUT 5000
1689
1690 static int win_chr_poll(void *opaque);
1691 static int win_chr_pipe_poll(void *opaque);
1692
1693 static void win_chr_close(CharDriverState *chr)
1694 {
1695 WinCharState *s = chr->opaque;
1696
1697 if (s->hsend) {
1698 CloseHandle(s->hsend);
1699 s->hsend = NULL;
1700 }
1701 if (s->hrecv) {
1702 CloseHandle(s->hrecv);
1703 s->hrecv = NULL;
1704 }
1705 if (s->hcom) {
1706 CloseHandle(s->hcom);
1707 s->hcom = NULL;
1708 }
1709 if (s->fpipe)
1710 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1711 else
1712 qemu_del_polling_cb(win_chr_poll, chr);
1713
1714 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1715 }
1716
1717 static int win_chr_init(CharDriverState *chr, const char *filename)
1718 {
1719 WinCharState *s = chr->opaque;
1720 COMMCONFIG comcfg;
1721 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1722 COMSTAT comstat;
1723 DWORD size;
1724 DWORD err;
1725
1726 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1727 if (!s->hsend) {
1728 fprintf(stderr, "Failed CreateEvent\n");
1729 goto fail;
1730 }
1731 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1732 if (!s->hrecv) {
1733 fprintf(stderr, "Failed CreateEvent\n");
1734 goto fail;
1735 }
1736
1737 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1738 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1739 if (s->hcom == INVALID_HANDLE_VALUE) {
1740 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1741 s->hcom = NULL;
1742 goto fail;
1743 }
1744
1745 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1746 fprintf(stderr, "Failed SetupComm\n");
1747 goto fail;
1748 }
1749
1750 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1751 size = sizeof(COMMCONFIG);
1752 GetDefaultCommConfig(filename, &comcfg, &size);
1753 comcfg.dcb.DCBlength = sizeof(DCB);
1754 CommConfigDialog(filename, NULL, &comcfg);
1755
1756 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1757 fprintf(stderr, "Failed SetCommState\n");
1758 goto fail;
1759 }
1760
1761 if (!SetCommMask(s->hcom, EV_ERR)) {
1762 fprintf(stderr, "Failed SetCommMask\n");
1763 goto fail;
1764 }
1765
1766 cto.ReadIntervalTimeout = MAXDWORD;
1767 if (!SetCommTimeouts(s->hcom, &cto)) {
1768 fprintf(stderr, "Failed SetCommTimeouts\n");
1769 goto fail;
1770 }
1771
1772 if (!ClearCommError(s->hcom, &err, &comstat)) {
1773 fprintf(stderr, "Failed ClearCommError\n");
1774 goto fail;
1775 }
1776 qemu_add_polling_cb(win_chr_poll, chr);
1777 return 0;
1778
1779 fail:
1780 win_chr_close(chr);
1781 return -1;
1782 }
1783
1784 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1785 {
1786 WinCharState *s = chr->opaque;
1787 DWORD len, ret, size, err;
1788
1789 len = len1;
1790 ZeroMemory(&s->osend, sizeof(s->osend));
1791 s->osend.hEvent = s->hsend;
1792 while (len > 0) {
1793 if (s->hsend)
1794 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1795 else
1796 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1797 if (!ret) {
1798 err = GetLastError();
1799 if (err == ERROR_IO_PENDING) {
1800 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1801 if (ret) {
1802 buf += size;
1803 len -= size;
1804 } else {
1805 break;
1806 }
1807 } else {
1808 break;
1809 }
1810 } else {
1811 buf += size;
1812 len -= size;
1813 }
1814 }
1815 return len1 - len;
1816 }
1817
1818 static int win_chr_read_poll(CharDriverState *chr)
1819 {
1820 WinCharState *s = chr->opaque;
1821
1822 s->max_size = qemu_chr_be_can_write(chr);
1823 return s->max_size;
1824 }
1825
1826 static void win_chr_readfile(CharDriverState *chr)
1827 {
1828 WinCharState *s = chr->opaque;
1829 int ret, err;
1830 uint8_t buf[READ_BUF_LEN];
1831 DWORD size;
1832
1833 ZeroMemory(&s->orecv, sizeof(s->orecv));
1834 s->orecv.hEvent = s->hrecv;
1835 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1836 if (!ret) {
1837 err = GetLastError();
1838 if (err == ERROR_IO_PENDING) {
1839 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1840 }
1841 }
1842
1843 if (size > 0) {
1844 qemu_chr_be_write(chr, buf, size);
1845 }
1846 }
1847
1848 static void win_chr_read(CharDriverState *chr)
1849 {
1850 WinCharState *s = chr->opaque;
1851
1852 if (s->len > s->max_size)
1853 s->len = s->max_size;
1854 if (s->len == 0)
1855 return;
1856
1857 win_chr_readfile(chr);
1858 }
1859
1860 static int win_chr_poll(void *opaque)
1861 {
1862 CharDriverState *chr = opaque;
1863 WinCharState *s = chr->opaque;
1864 COMSTAT status;
1865 DWORD comerr;
1866
1867 ClearCommError(s->hcom, &comerr, &status);
1868 if (status.cbInQue > 0) {
1869 s->len = status.cbInQue;
1870 win_chr_read_poll(chr);
1871 win_chr_read(chr);
1872 return 1;
1873 }
1874 return 0;
1875 }
1876
1877 static CharDriverState *qemu_chr_open_win_path(const char *filename)
1878 {
1879 CharDriverState *chr;
1880 WinCharState *s;
1881
1882 chr = g_malloc0(sizeof(CharDriverState));
1883 s = g_malloc0(sizeof(WinCharState));
1884 chr->opaque = s;
1885 chr->chr_write = win_chr_write;
1886 chr->chr_close = win_chr_close;
1887
1888 if (win_chr_init(chr, filename) < 0) {
1889 g_free(s);
1890 g_free(chr);
1891 return NULL;
1892 }
1893 qemu_chr_be_generic_open(chr);
1894 return chr;
1895 }
1896
1897 static int win_chr_pipe_poll(void *opaque)
1898 {
1899 CharDriverState *chr = opaque;
1900 WinCharState *s = chr->opaque;
1901 DWORD size;
1902
1903 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1904 if (size > 0) {
1905 s->len = size;
1906 win_chr_read_poll(chr);
1907 win_chr_read(chr);
1908 return 1;
1909 }
1910 return 0;
1911 }
1912
1913 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1914 {
1915 WinCharState *s = chr->opaque;
1916 OVERLAPPED ov;
1917 int ret;
1918 DWORD size;
1919 char openname[256];
1920
1921 s->fpipe = TRUE;
1922
1923 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1924 if (!s->hsend) {
1925 fprintf(stderr, "Failed CreateEvent\n");
1926 goto fail;
1927 }
1928 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1929 if (!s->hrecv) {
1930 fprintf(stderr, "Failed CreateEvent\n");
1931 goto fail;
1932 }
1933
1934 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1935 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1936 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1937 PIPE_WAIT,
1938 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1939 if (s->hcom == INVALID_HANDLE_VALUE) {
1940 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1941 s->hcom = NULL;
1942 goto fail;
1943 }
1944
1945 ZeroMemory(&ov, sizeof(ov));
1946 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1947 ret = ConnectNamedPipe(s->hcom, &ov);
1948 if (ret) {
1949 fprintf(stderr, "Failed ConnectNamedPipe\n");
1950 goto fail;
1951 }
1952
1953 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1954 if (!ret) {
1955 fprintf(stderr, "Failed GetOverlappedResult\n");
1956 if (ov.hEvent) {
1957 CloseHandle(ov.hEvent);
1958 ov.hEvent = NULL;
1959 }
1960 goto fail;
1961 }
1962
1963 if (ov.hEvent) {
1964 CloseHandle(ov.hEvent);
1965 ov.hEvent = NULL;
1966 }
1967 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1968 return 0;
1969
1970 fail:
1971 win_chr_close(chr);
1972 return -1;
1973 }
1974
1975
1976 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
1977 {
1978 const char *filename = opts->device;
1979 CharDriverState *chr;
1980 WinCharState *s;
1981
1982 chr = g_malloc0(sizeof(CharDriverState));
1983 s = g_malloc0(sizeof(WinCharState));
1984 chr->opaque = s;
1985 chr->chr_write = win_chr_write;
1986 chr->chr_close = win_chr_close;
1987
1988 if (win_chr_pipe_init(chr, filename) < 0) {
1989 g_free(s);
1990 g_free(chr);
1991 return NULL;
1992 }
1993 qemu_chr_be_generic_open(chr);
1994 return chr;
1995 }
1996
1997 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1998 {
1999 CharDriverState *chr;
2000 WinCharState *s;
2001
2002 chr = g_malloc0(sizeof(CharDriverState));
2003 s = g_malloc0(sizeof(WinCharState));
2004 s->hcom = fd_out;
2005 chr->opaque = s;
2006 chr->chr_write = win_chr_write;
2007 qemu_chr_be_generic_open(chr);
2008 return chr;
2009 }
2010
2011 static CharDriverState *qemu_chr_open_win_con(void)
2012 {
2013 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
2014 }
2015
2016 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
2017 {
2018 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
2019 DWORD dwSize;
2020 int len1;
2021
2022 len1 = len;
2023
2024 while (len1 > 0) {
2025 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
2026 break;
2027 }
2028 buf += dwSize;
2029 len1 -= dwSize;
2030 }
2031
2032 return len - len1;
2033 }
2034
2035 static void win_stdio_wait_func(void *opaque)
2036 {
2037 CharDriverState *chr = opaque;
2038 WinStdioCharState *stdio = chr->opaque;
2039 INPUT_RECORD buf[4];
2040 int ret;
2041 DWORD dwSize;
2042 int i;
2043
2044 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
2045 &dwSize);
2046
2047 if (!ret) {
2048 /* Avoid error storm */
2049 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2050 return;
2051 }
2052
2053 for (i = 0; i < dwSize; i++) {
2054 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2055
2056 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2057 int j;
2058 if (kev->uChar.AsciiChar != 0) {
2059 for (j = 0; j < kev->wRepeatCount; j++) {
2060 if (qemu_chr_be_can_write(chr)) {
2061 uint8_t c = kev->uChar.AsciiChar;
2062 qemu_chr_be_write(chr, &c, 1);
2063 }
2064 }
2065 }
2066 }
2067 }
2068 }
2069
2070 static DWORD WINAPI win_stdio_thread(LPVOID param)
2071 {
2072 CharDriverState *chr = param;
2073 WinStdioCharState *stdio = chr->opaque;
2074 int ret;
2075 DWORD dwSize;
2076
2077 while (1) {
2078
2079 /* Wait for one byte */
2080 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2081
2082 /* Exit in case of error, continue if nothing read */
2083 if (!ret) {
2084 break;
2085 }
2086 if (!dwSize) {
2087 continue;
2088 }
2089
2090 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2091 if (stdio->win_stdio_buf == '\r') {
2092 continue;
2093 }
2094
2095 /* Signal the main thread and wait until the byte was eaten */
2096 if (!SetEvent(stdio->hInputReadyEvent)) {
2097 break;
2098 }
2099 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2100 != WAIT_OBJECT_0) {
2101 break;
2102 }
2103 }
2104
2105 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2106 return 0;
2107 }
2108
2109 static void win_stdio_thread_wait_func(void *opaque)
2110 {
2111 CharDriverState *chr = opaque;
2112 WinStdioCharState *stdio = chr->opaque;
2113
2114 if (qemu_chr_be_can_write(chr)) {
2115 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2116 }
2117
2118 SetEvent(stdio->hInputDoneEvent);
2119 }
2120
2121 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2122 {
2123 WinStdioCharState *stdio = chr->opaque;
2124 DWORD dwMode = 0;
2125
2126 GetConsoleMode(stdio->hStdIn, &dwMode);
2127
2128 if (echo) {
2129 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2130 } else {
2131 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2132 }
2133 }
2134
2135 static void win_stdio_close(CharDriverState *chr)
2136 {
2137 WinStdioCharState *stdio = chr->opaque;
2138
2139 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2140 CloseHandle(stdio->hInputReadyEvent);
2141 }
2142 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2143 CloseHandle(stdio->hInputDoneEvent);
2144 }
2145 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2146 TerminateThread(stdio->hInputThread, 0);
2147 }
2148
2149 g_free(chr->opaque);
2150 g_free(chr);
2151 }
2152
2153 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
2154 {
2155 CharDriverState *chr;
2156 WinStdioCharState *stdio;
2157 DWORD dwMode;
2158 int is_console = 0;
2159
2160 chr = g_malloc0(sizeof(CharDriverState));
2161 stdio = g_malloc0(sizeof(WinStdioCharState));
2162
2163 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2164 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2165 fprintf(stderr, "cannot open stdio: invalid handle\n");
2166 exit(1);
2167 }
2168
2169 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2170
2171 chr->opaque = stdio;
2172 chr->chr_write = win_stdio_write;
2173 chr->chr_close = win_stdio_close;
2174
2175 if (is_console) {
2176 if (qemu_add_wait_object(stdio->hStdIn,
2177 win_stdio_wait_func, chr)) {
2178 fprintf(stderr, "qemu_add_wait_object: failed\n");
2179 }
2180 } else {
2181 DWORD dwId;
2182
2183 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2184 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2185 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2186 chr, 0, &dwId);
2187
2188 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2189 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2190 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2191 fprintf(stderr, "cannot create stdio thread or event\n");
2192 exit(1);
2193 }
2194 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2195 win_stdio_thread_wait_func, chr)) {
2196 fprintf(stderr, "qemu_add_wait_object: failed\n");
2197 }
2198 }
2199
2200 dwMode |= ENABLE_LINE_INPUT;
2201
2202 if (is_console) {
2203 /* set the terminal in raw mode */
2204 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2205 dwMode |= ENABLE_PROCESSED_INPUT;
2206 }
2207
2208 SetConsoleMode(stdio->hStdIn, dwMode);
2209
2210 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2211 qemu_chr_fe_set_echo(chr, false);
2212
2213 return chr;
2214 }
2215 #endif /* !_WIN32 */
2216
2217
2218 /***********************************************************/
2219 /* UDP Net console */
2220
2221 typedef struct {
2222 int fd;
2223 GIOChannel *chan;
2224 guint tag;
2225 uint8_t buf[READ_BUF_LEN];
2226 int bufcnt;
2227 int bufptr;
2228 int max_size;
2229 } NetCharDriver;
2230
2231 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2232 {
2233 NetCharDriver *s = chr->opaque;
2234 gsize bytes_written;
2235 GIOStatus status;
2236
2237 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2238 if (status == G_IO_STATUS_EOF) {
2239 return 0;
2240 } else if (status != G_IO_STATUS_NORMAL) {
2241 return -1;
2242 }
2243
2244 return bytes_written;
2245 }
2246
2247 static int udp_chr_read_poll(void *opaque)
2248 {
2249 CharDriverState *chr = opaque;
2250 NetCharDriver *s = chr->opaque;
2251
2252 s->max_size = qemu_chr_be_can_write(chr);
2253
2254 /* If there were any stray characters in the queue process them
2255 * first
2256 */
2257 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2258 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2259 s->bufptr++;
2260 s->max_size = qemu_chr_be_can_write(chr);
2261 }
2262 return s->max_size;
2263 }
2264
2265 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2266 {
2267 CharDriverState *chr = opaque;
2268 NetCharDriver *s = chr->opaque;
2269 gsize bytes_read = 0;
2270 GIOStatus status;
2271
2272 if (s->max_size == 0) {
2273 return TRUE;
2274 }
2275 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2276 &bytes_read, NULL);
2277 s->bufcnt = bytes_read;
2278 s->bufptr = s->bufcnt;
2279 if (status != G_IO_STATUS_NORMAL) {
2280 if (s->tag) {
2281 io_remove_watch_poll(s->tag);
2282 s->tag = 0;
2283 }
2284 return FALSE;
2285 }
2286
2287 s->bufptr = 0;
2288 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2289 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2290 s->bufptr++;
2291 s->max_size = qemu_chr_be_can_write(chr);
2292 }
2293
2294 return TRUE;
2295 }
2296
2297 static void udp_chr_update_read_handler(CharDriverState *chr)
2298 {
2299 NetCharDriver *s = chr->opaque;
2300
2301 if (s->tag) {
2302 io_remove_watch_poll(s->tag);
2303 s->tag = 0;
2304 }
2305
2306 if (s->chan) {
2307 s->tag = io_add_watch_poll(s->chan, udp_chr_read_poll, udp_chr_read, chr);
2308 }
2309 }
2310
2311 static void udp_chr_close(CharDriverState *chr)
2312 {
2313 NetCharDriver *s = chr->opaque;
2314 if (s->tag) {
2315 io_remove_watch_poll(s->tag);
2316 s->tag = 0;
2317 }
2318 if (s->chan) {
2319 g_io_channel_unref(s->chan);
2320 closesocket(s->fd);
2321 }
2322 g_free(s);
2323 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2324 }
2325
2326 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2327 {
2328 CharDriverState *chr = NULL;
2329 NetCharDriver *s = NULL;
2330
2331 chr = g_malloc0(sizeof(CharDriverState));
2332 s = g_malloc0(sizeof(NetCharDriver));
2333
2334 s->fd = fd;
2335 s->chan = io_channel_from_socket(s->fd);
2336 s->bufcnt = 0;
2337 s->bufptr = 0;
2338 chr->opaque = s;
2339 chr->chr_write = udp_chr_write;
2340 chr->chr_update_read_handler = udp_chr_update_read_handler;
2341 chr->chr_close = udp_chr_close;
2342 return chr;
2343 }
2344
2345 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2346 {
2347 Error *local_err = NULL;
2348 int fd = -1;
2349
2350 fd = inet_dgram_opts(opts, &local_err);
2351 if (fd < 0) {
2352 return NULL;
2353 }
2354 return qemu_chr_open_udp_fd(fd);
2355 }
2356
2357 /***********************************************************/
2358 /* TCP Net console */
2359
2360 typedef struct {
2361
2362 GIOChannel *chan, *listen_chan;
2363 guint tag, listen_tag;
2364 int fd, listen_fd;
2365 int connected;
2366 int max_size;
2367 int do_telnetopt;
2368 int do_nodelay;
2369 int is_unix;
2370 int msgfd;
2371 } TCPCharDriver;
2372
2373 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2374
2375 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2376 {
2377 TCPCharDriver *s = chr->opaque;
2378 if (s->connected) {
2379 return io_channel_send(s->chan, buf, len);
2380 } else {
2381 /* XXX: indicate an error ? */
2382 return len;
2383 }
2384 }
2385
2386 static int tcp_chr_read_poll(void *opaque)
2387 {
2388 CharDriverState *chr = opaque;
2389 TCPCharDriver *s = chr->opaque;
2390 if (!s->connected)
2391 return 0;
2392 s->max_size = qemu_chr_be_can_write(chr);
2393 return s->max_size;
2394 }
2395
2396 #define IAC 255
2397 #define IAC_BREAK 243
2398 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2399 TCPCharDriver *s,
2400 uint8_t *buf, int *size)
2401 {
2402 /* Handle any telnet client's basic IAC options to satisfy char by
2403 * char mode with no echo. All IAC options will be removed from
2404 * the buf and the do_telnetopt variable will be used to track the
2405 * state of the width of the IAC information.
2406 *
2407 * IAC commands come in sets of 3 bytes with the exception of the
2408 * "IAC BREAK" command and the double IAC.
2409 */
2410
2411 int i;
2412 int j = 0;
2413
2414 for (i = 0; i < *size; i++) {
2415 if (s->do_telnetopt > 1) {
2416 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2417 /* Double IAC means send an IAC */
2418 if (j != i)
2419 buf[j] = buf[i];
2420 j++;
2421 s->do_telnetopt = 1;
2422 } else {
2423 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2424 /* Handle IAC break commands by sending a serial break */
2425 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2426 s->do_telnetopt++;
2427 }
2428 s->do_telnetopt++;
2429 }
2430 if (s->do_telnetopt >= 4) {
2431 s->do_telnetopt = 1;
2432 }
2433 } else {
2434 if ((unsigned char)buf[i] == IAC) {
2435 s->do_telnetopt = 2;
2436 } else {
2437 if (j != i)
2438 buf[j] = buf[i];
2439 j++;
2440 }
2441 }
2442 }
2443 *size = j;
2444 }
2445
2446 static int tcp_get_msgfd(CharDriverState *chr)
2447 {
2448 TCPCharDriver *s = chr->opaque;
2449 int fd = s->msgfd;
2450 s->msgfd = -1;
2451 return fd;
2452 }
2453
2454 #ifndef _WIN32
2455 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2456 {
2457 TCPCharDriver *s = chr->opaque;
2458 struct cmsghdr *cmsg;
2459
2460 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2461 int fd;
2462
2463 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2464 cmsg->cmsg_level != SOL_SOCKET ||
2465 cmsg->cmsg_type != SCM_RIGHTS)
2466 continue;
2467
2468 fd = *((int *)CMSG_DATA(cmsg));
2469 if (fd < 0)
2470 continue;
2471
2472 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2473 qemu_set_block(fd);
2474
2475 #ifndef MSG_CMSG_CLOEXEC
2476 qemu_set_cloexec(fd);
2477 #endif
2478 if (s->msgfd != -1)
2479 close(s->msgfd);
2480 s->msgfd = fd;
2481 }
2482 }
2483
2484 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2485 {
2486 TCPCharDriver *s = chr->opaque;
2487 struct msghdr msg = { NULL, };
2488 struct iovec iov[1];
2489 union {
2490 struct cmsghdr cmsg;
2491 char control[CMSG_SPACE(sizeof(int))];
2492 } msg_control;
2493 int flags = 0;
2494 ssize_t ret;
2495
2496 iov[0].iov_base = buf;
2497 iov[0].iov_len = len;
2498
2499 msg.msg_iov = iov;
2500 msg.msg_iovlen = 1;
2501 msg.msg_control = &msg_control;
2502 msg.msg_controllen = sizeof(msg_control);
2503
2504 #ifdef MSG_CMSG_CLOEXEC
2505 flags |= MSG_CMSG_CLOEXEC;
2506 #endif
2507 ret = recvmsg(s->fd, &msg, flags);
2508 if (ret > 0 && s->is_unix) {
2509 unix_process_msgfd(chr, &msg);
2510 }
2511
2512 return ret;
2513 }
2514 #else
2515 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2516 {
2517 TCPCharDriver *s = chr->opaque;
2518 return qemu_recv(s->fd, buf, len, 0);
2519 }
2520 #endif
2521
2522 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2523 {
2524 TCPCharDriver *s = chr->opaque;
2525 return g_io_create_watch(s->chan, cond);
2526 }
2527
2528 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2529 {
2530 CharDriverState *chr = opaque;
2531 TCPCharDriver *s = chr->opaque;
2532 uint8_t buf[READ_BUF_LEN];
2533 int len, size;
2534
2535 if (!s->connected || s->max_size <= 0) {
2536 return TRUE;
2537 }
2538 len = sizeof(buf);
2539 if (len > s->max_size)
2540 len = s->max_size;
2541 size = tcp_chr_recv(chr, (void *)buf, len);
2542 if (size == 0) {
2543 /* connection closed */
2544 s->connected = 0;
2545 if (s->listen_chan) {
2546 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2547 }
2548 if (s->tag) {
2549 io_remove_watch_poll(s->tag);
2550 s->tag = 0;
2551 }
2552 g_io_channel_unref(s->chan);
2553 s->chan = NULL;
2554 closesocket(s->fd);
2555 s->fd = -1;
2556 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2557 } else if (size > 0) {
2558 if (s->do_telnetopt)
2559 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2560 if (size > 0)
2561 qemu_chr_be_write(chr, buf, size);
2562 }
2563
2564 return TRUE;
2565 }
2566
2567 #ifndef _WIN32
2568 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2569 {
2570 return qemu_chr_open_fd(eventfd, eventfd);
2571 }
2572 #endif
2573
2574 static void tcp_chr_connect(void *opaque)
2575 {
2576 CharDriverState *chr = opaque;
2577 TCPCharDriver *s = chr->opaque;
2578
2579 s->connected = 1;
2580 if (s->chan) {
2581 s->tag = io_add_watch_poll(s->chan, tcp_chr_read_poll, tcp_chr_read, chr);
2582 }
2583 qemu_chr_be_generic_open(chr);
2584 }
2585
2586 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2587 static void tcp_chr_telnet_init(int fd)
2588 {
2589 char buf[3];
2590 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2591 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2592 send(fd, (char *)buf, 3, 0);
2593 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2594 send(fd, (char *)buf, 3, 0);
2595 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2596 send(fd, (char *)buf, 3, 0);
2597 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2598 send(fd, (char *)buf, 3, 0);
2599 }
2600
2601 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2602 {
2603 TCPCharDriver *s = chr->opaque;
2604 if (s->fd != -1)
2605 return -1;
2606
2607 qemu_set_nonblock(fd);
2608 if (s->do_nodelay)
2609 socket_set_nodelay(fd);
2610 s->fd = fd;
2611 s->chan = io_channel_from_socket(fd);
2612 if (s->listen_tag) {
2613 g_source_remove(s->listen_tag);
2614 s->listen_tag = 0;
2615 }
2616 tcp_chr_connect(chr);
2617
2618 return 0;
2619 }
2620
2621 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
2622 {
2623 CharDriverState *chr = opaque;
2624 TCPCharDriver *s = chr->opaque;
2625 struct sockaddr_in saddr;
2626 #ifndef _WIN32
2627 struct sockaddr_un uaddr;
2628 #endif
2629 struct sockaddr *addr;
2630 socklen_t len;
2631 int fd;
2632
2633 for(;;) {
2634 #ifndef _WIN32
2635 if (s->is_unix) {
2636 len = sizeof(uaddr);
2637 addr = (struct sockaddr *)&uaddr;
2638 } else
2639 #endif
2640 {
2641 len = sizeof(saddr);
2642 addr = (struct sockaddr *)&saddr;
2643 }
2644 fd = qemu_accept(s->listen_fd, addr, &len);
2645 if (fd < 0 && errno != EINTR) {
2646 s->listen_tag = 0;
2647 return FALSE;
2648 } else if (fd >= 0) {
2649 if (s->do_telnetopt)
2650 tcp_chr_telnet_init(fd);
2651 break;
2652 }
2653 }
2654 if (tcp_chr_add_client(chr, fd) < 0)
2655 close(fd);
2656
2657 return TRUE;
2658 }
2659
2660 static void tcp_chr_close(CharDriverState *chr)
2661 {
2662 TCPCharDriver *s = chr->opaque;
2663 if (s->fd >= 0) {
2664 if (s->tag) {
2665 io_remove_watch_poll(s->tag);
2666 s->tag = 0;
2667 }
2668 if (s->chan) {
2669 g_io_channel_unref(s->chan);
2670 }
2671 closesocket(s->fd);
2672 }
2673 if (s->listen_fd >= 0) {
2674 if (s->listen_tag) {
2675 g_source_remove(s->listen_tag);
2676 s->listen_tag = 0;
2677 }
2678 if (s->listen_chan) {
2679 g_io_channel_unref(s->listen_chan);
2680 }
2681 closesocket(s->listen_fd);
2682 }
2683 g_free(s);
2684 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2685 }
2686
2687 static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
2688 bool is_listen, bool is_telnet,
2689 bool is_waitconnect,
2690 Error **errp)
2691 {
2692 CharDriverState *chr = NULL;
2693 TCPCharDriver *s = NULL;
2694 char host[NI_MAXHOST], serv[NI_MAXSERV];
2695 const char *left = "", *right = "";
2696 struct sockaddr_storage ss;
2697 socklen_t ss_len = sizeof(ss);
2698
2699 memset(&ss, 0, ss_len);
2700 if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2701 error_setg(errp, "getsockname: %s", strerror(errno));
2702 return NULL;
2703 }
2704
2705 chr = g_malloc0(sizeof(CharDriverState));
2706 s = g_malloc0(sizeof(TCPCharDriver));
2707
2708 s->connected = 0;
2709 s->fd = -1;
2710 s->listen_fd = -1;
2711 s->msgfd = -1;
2712
2713 chr->filename = g_malloc(256);
2714 switch (ss.ss_family) {
2715 #ifndef _WIN32
2716 case AF_UNIX:
2717 s->is_unix = 1;
2718 snprintf(chr->filename, 256, "unix:%s%s",
2719 ((struct sockaddr_un *)(&ss))->sun_path,
2720 is_listen ? ",server" : "");
2721 break;
2722 #endif
2723 case AF_INET6:
2724 left = "[";
2725 right = "]";
2726 /* fall through */
2727 case AF_INET:
2728 s->do_nodelay = do_nodelay;
2729 getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
2730 serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
2731 snprintf(chr->filename, 256, "%s:%s%s%s:%s%s",
2732 is_telnet ? "telnet" : "tcp",
2733 left, host, right, serv,
2734 is_listen ? ",server" : "");
2735 break;
2736 }
2737
2738 chr->opaque = s;
2739 chr->chr_write = tcp_chr_write;
2740 chr->chr_close = tcp_chr_close;
2741 chr->get_msgfd = tcp_get_msgfd;
2742 chr->chr_add_client = tcp_chr_add_client;
2743 chr->chr_add_watch = tcp_chr_add_watch;
2744
2745 if (is_listen) {
2746 s->listen_fd = fd;
2747 s->listen_chan = io_channel_from_socket(s->listen_fd);
2748 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2749 if (is_telnet) {
2750 s->do_telnetopt = 1;
2751 }
2752 } else {
2753 s->connected = 1;
2754 s->fd = fd;
2755 socket_set_nodelay(fd);
2756 s->chan = io_channel_from_socket(s->fd);
2757 tcp_chr_connect(chr);
2758 }
2759
2760 if (is_listen && is_waitconnect) {
2761 printf("QEMU waiting for connection on: %s\n",
2762 chr->filename);
2763 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
2764 qemu_set_nonblock(s->listen_fd);
2765 }
2766 return chr;
2767 }
2768
2769 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2770 {
2771 CharDriverState *chr = NULL;
2772 Error *local_err = NULL;
2773 int fd = -1;
2774 int is_listen;
2775 int is_waitconnect;
2776 int do_nodelay;
2777 int is_unix;
2778 int is_telnet;
2779
2780 is_listen = qemu_opt_get_bool(opts, "server", 0);
2781 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2782 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2783 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2784 is_unix = qemu_opt_get(opts, "path") != NULL;
2785 if (!is_listen)
2786 is_waitconnect = 0;
2787
2788 if (is_unix) {
2789 if (is_listen) {
2790 fd = unix_listen_opts(opts, &local_err);
2791 } else {
2792 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
2793 }
2794 } else {
2795 if (is_listen) {
2796 fd = inet_listen_opts(opts, 0, &local_err);
2797 } else {
2798 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
2799 }
2800 }
2801 if (fd < 0) {
2802 goto fail;
2803 }
2804
2805 if (!is_waitconnect)
2806 qemu_set_nonblock(fd);
2807
2808 chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet,
2809 is_waitconnect, &local_err);
2810 if (error_is_set(&local_err)) {
2811 goto fail;
2812 }
2813 return chr;
2814
2815
2816 fail:
2817 if (local_err) {
2818 qerror_report_err(local_err);
2819 error_free(local_err);
2820 }
2821 if (fd >= 0) {
2822 closesocket(fd);
2823 }
2824 if (chr) {
2825 g_free(chr->opaque);
2826 g_free(chr);
2827 }
2828 return NULL;
2829 }
2830
2831 /*********************************************************/
2832 /* Ring buffer chardev */
2833
2834 typedef struct {
2835 size_t size;
2836 size_t prod;
2837 size_t cons;
2838 uint8_t *cbuf;
2839 } RingBufCharDriver;
2840
2841 static size_t ringbuf_count(const CharDriverState *chr)
2842 {
2843 const RingBufCharDriver *d = chr->opaque;
2844
2845 return d->prod - d->cons;
2846 }
2847
2848 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2849 {
2850 RingBufCharDriver *d = chr->opaque;
2851 int i;
2852
2853 if (!buf || (len < 0)) {
2854 return -1;
2855 }
2856
2857 for (i = 0; i < len; i++ ) {
2858 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
2859 if (d->prod - d->cons > d->size) {
2860 d->cons = d->prod - d->size;
2861 }
2862 }
2863
2864 return 0;
2865 }
2866
2867 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
2868 {
2869 RingBufCharDriver *d = chr->opaque;
2870 int i;
2871
2872 for (i = 0; i < len && d->cons != d->prod; i++) {
2873 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
2874 }
2875
2876 return i;
2877 }
2878
2879 static void ringbuf_chr_close(struct CharDriverState *chr)
2880 {
2881 RingBufCharDriver *d = chr->opaque;
2882
2883 g_free(d->cbuf);
2884 g_free(d);
2885 chr->opaque = NULL;
2886 }
2887
2888 static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts,
2889 Error **errp)
2890 {
2891 CharDriverState *chr;
2892 RingBufCharDriver *d;
2893
2894 chr = g_malloc0(sizeof(CharDriverState));
2895 d = g_malloc(sizeof(*d));
2896
2897 d->size = opts->has_size ? opts->size : 65536;
2898
2899 /* The size must be power of 2 */
2900 if (d->size & (d->size - 1)) {
2901 error_setg(errp, "size of ringbuf chardev must be power of two");
2902 goto fail;
2903 }
2904
2905 d->prod = 0;
2906 d->cons = 0;
2907 d->cbuf = g_malloc0(d->size);
2908
2909 chr->opaque = d;
2910 chr->chr_write = ringbuf_chr_write;
2911 chr->chr_close = ringbuf_chr_close;
2912
2913 return chr;
2914
2915 fail:
2916 g_free(d);
2917 g_free(chr);
2918 return NULL;
2919 }
2920
2921 static bool chr_is_ringbuf(const CharDriverState *chr)
2922 {
2923 return chr->chr_write == ringbuf_chr_write;
2924 }
2925
2926 void qmp_ringbuf_write(const char *device, const char *data,
2927 bool has_format, enum DataFormat format,
2928 Error **errp)
2929 {
2930 CharDriverState *chr;
2931 const uint8_t *write_data;
2932 int ret;
2933 size_t write_count;
2934
2935 chr = qemu_chr_find(device);
2936 if (!chr) {
2937 error_setg(errp, "Device '%s' not found", device);
2938 return;
2939 }
2940
2941 if (!chr_is_ringbuf(chr)) {
2942 error_setg(errp,"%s is not a ringbuf device", device);
2943 return;
2944 }
2945
2946 if (has_format && (format == DATA_FORMAT_BASE64)) {
2947 write_data = g_base64_decode(data, &write_count);
2948 } else {
2949 write_data = (uint8_t *)data;
2950 write_count = strlen(data);
2951 }
2952
2953 ret = ringbuf_chr_write(chr, write_data, write_count);
2954
2955 if (write_data != (uint8_t *)data) {
2956 g_free((void *)write_data);
2957 }
2958
2959 if (ret < 0) {
2960 error_setg(errp, "Failed to write to device %s", device);
2961 return;
2962 }
2963 }
2964
2965 char *qmp_ringbuf_read(const char *device, int64_t size,
2966 bool has_format, enum DataFormat format,
2967 Error **errp)
2968 {
2969 CharDriverState *chr;
2970 uint8_t *read_data;
2971 size_t count;
2972 char *data;
2973
2974 chr = qemu_chr_find(device);
2975 if (!chr) {
2976 error_setg(errp, "Device '%s' not found", device);
2977 return NULL;
2978 }
2979
2980 if (!chr_is_ringbuf(chr)) {
2981 error_setg(errp,"%s is not a ringbuf device", device);
2982 return NULL;
2983 }
2984
2985 if (size <= 0) {
2986 error_setg(errp, "size must be greater than zero");
2987 return NULL;
2988 }
2989
2990 count = ringbuf_count(chr);
2991 size = size > count ? count : size;
2992 read_data = g_malloc(size + 1);
2993
2994 ringbuf_chr_read(chr, read_data, size);
2995
2996 if (has_format && (format == DATA_FORMAT_BASE64)) {
2997 data = g_base64_encode(read_data, size);
2998 g_free(read_data);
2999 } else {
3000 /*
3001 * FIXME should read only complete, valid UTF-8 characters up
3002 * to @size bytes. Invalid sequences should be replaced by a
3003 * suitable replacement character. Except when (and only
3004 * when) ring buffer lost characters since last read, initial
3005 * continuation characters should be dropped.
3006 */
3007 read_data[size] = 0;
3008 data = (char *)read_data;
3009 }
3010
3011 return data;
3012 }
3013
3014 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
3015 {
3016 char host[65], port[33], width[8], height[8];
3017 int pos;
3018 const char *p;
3019 QemuOpts *opts;
3020 Error *local_err = NULL;
3021
3022 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
3023 if (error_is_set(&local_err)) {
3024 qerror_report_err(local_err);
3025 error_free(local_err);
3026 return NULL;
3027 }
3028
3029 if (strstart(filename, "mon:", &p)) {
3030 filename = p;
3031 qemu_opt_set(opts, "mux", "on");
3032 }
3033
3034 if (strcmp(filename, "null") == 0 ||
3035 strcmp(filename, "pty") == 0 ||
3036 strcmp(filename, "msmouse") == 0 ||
3037 strcmp(filename, "braille") == 0 ||
3038 strcmp(filename, "stdio") == 0) {
3039 qemu_opt_set(opts, "backend", filename);
3040 return opts;
3041 }
3042 if (strstart(filename, "vc", &p)) {
3043 qemu_opt_set(opts, "backend", "vc");
3044 if (*p == ':') {
3045 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
3046 /* pixels */
3047 qemu_opt_set(opts, "width", width);
3048 qemu_opt_set(opts, "height", height);
3049 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
3050 /* chars */
3051 qemu_opt_set(opts, "cols", width);
3052 qemu_opt_set(opts, "rows", height);
3053 } else {
3054 goto fail;
3055 }
3056 }
3057 return opts;
3058 }
3059 if (strcmp(filename, "con:") == 0) {
3060 qemu_opt_set(opts, "backend", "console");
3061 return opts;
3062 }
3063 if (strstart(filename, "COM", NULL)) {
3064 qemu_opt_set(opts, "backend", "serial");
3065 qemu_opt_set(opts, "path", filename);
3066 return opts;
3067 }
3068 if (strstart(filename, "file:", &p)) {
3069 qemu_opt_set(opts, "backend", "file");
3070 qemu_opt_set(opts, "path", p);
3071 return opts;
3072 }
3073 if (strstart(filename, "pipe:", &p)) {
3074 qemu_opt_set(opts, "backend", "pipe");
3075 qemu_opt_set(opts, "path", p);
3076 return opts;
3077 }
3078 if (strstart(filename, "tcp:", &p) ||
3079 strstart(filename, "telnet:", &p)) {
3080 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3081 host[0] = 0;
3082 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3083 goto fail;
3084 }
3085 qemu_opt_set(opts, "backend", "socket");
3086 qemu_opt_set(opts, "host", host);
3087 qemu_opt_set(opts, "port", port);
3088 if (p[pos] == ',') {
3089 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
3090 goto fail;
3091 }
3092 if (strstart(filename, "telnet:", &p))
3093 qemu_opt_set(opts, "telnet", "on");
3094 return opts;
3095 }
3096 if (strstart(filename, "udp:", &p)) {
3097 qemu_opt_set(opts, "backend", "udp");
3098 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3099 host[0] = 0;
3100 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3101 goto fail;
3102 }
3103 }
3104 qemu_opt_set(opts, "host", host);
3105 qemu_opt_set(opts, "port", port);
3106 if (p[pos] == '@') {
3107 p += pos + 1;
3108 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3109 host[0] = 0;
3110 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3111 goto fail;
3112 }
3113 }
3114 qemu_opt_set(opts, "localaddr", host);
3115 qemu_opt_set(opts, "localport", port);
3116 }
3117 return opts;
3118 }
3119 if (strstart(filename, "unix:", &p)) {
3120 qemu_opt_set(opts, "backend", "socket");
3121 if (qemu_opts_do_parse(opts, p, "path") != 0)
3122 goto fail;
3123 return opts;
3124 }
3125 if (strstart(filename, "/dev/parport", NULL) ||
3126 strstart(filename, "/dev/ppi", NULL)) {
3127 qemu_opt_set(opts, "backend", "parport");
3128 qemu_opt_set(opts, "path", filename);
3129 return opts;
3130 }
3131 if (strstart(filename, "/dev/", NULL)) {
3132 qemu_opt_set(opts, "backend", "tty");
3133 qemu_opt_set(opts, "path", filename);
3134 return opts;
3135 }
3136
3137 fail:
3138 qemu_opts_del(opts);
3139 return NULL;
3140 }
3141
3142 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3143 Error **errp)
3144 {
3145 const char *path = qemu_opt_get(opts, "path");
3146
3147 if (path == NULL) {
3148 error_setg(errp, "chardev: file: no filename given");
3149 return;
3150 }
3151 backend->file = g_new0(ChardevFile, 1);
3152 backend->file->out = g_strdup(path);
3153 }
3154
3155 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3156 Error **errp)
3157 {
3158 backend->stdio = g_new0(ChardevStdio, 1);
3159 backend->stdio->has_signal = true;
3160 backend->stdio->signal =
3161 qemu_opt_get_bool(opts, "signal", display_type != DT_NOGRAPHIC);
3162 }
3163
3164 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3165 Error **errp)
3166 {
3167 const char *device = qemu_opt_get(opts, "path");
3168
3169 if (device == NULL) {
3170 error_setg(errp, "chardev: serial/tty: no device path given");
3171 return;
3172 }
3173 backend->serial = g_new0(ChardevHostdev, 1);
3174 backend->serial->device = g_strdup(device);
3175 }
3176
3177 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3178 Error **errp)
3179 {
3180 const char *device = qemu_opt_get(opts, "path");
3181
3182 if (device == NULL) {
3183 error_setg(errp, "chardev: parallel: no device path given");
3184 return;
3185 }
3186 backend->parallel = g_new0(ChardevHostdev, 1);
3187 backend->parallel->device = g_strdup(device);
3188 }
3189
3190 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3191 Error **errp)
3192 {
3193 const char *device = qemu_opt_get(opts, "path");
3194
3195 if (device == NULL) {
3196 error_setg(errp, "chardev: pipe: no device path given");
3197 return;
3198 }
3199 backend->pipe = g_new0(ChardevHostdev, 1);
3200 backend->pipe->device = g_strdup(device);
3201 }
3202
3203 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3204 Error **errp)
3205 {
3206 int val;
3207
3208 backend->memory = g_new0(ChardevRingbuf, 1);
3209
3210 val = qemu_opt_get_number(opts, "size", 0);
3211 if (val != 0) {
3212 backend->memory->has_size = true;
3213 backend->memory->size = val;
3214 }
3215 }
3216
3217 typedef struct CharDriver {
3218 const char *name;
3219 /* old, pre qapi */
3220 CharDriverState *(*open)(QemuOpts *opts);
3221 /* new, qapi-based */
3222 int kind;
3223 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3224 } CharDriver;
3225
3226 static GSList *backends;
3227
3228 void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *))
3229 {
3230 CharDriver *s;
3231
3232 s = g_malloc0(sizeof(*s));
3233 s->name = g_strdup(name);
3234 s->open = open;
3235
3236 backends = g_slist_append(backends, s);
3237 }
3238
3239 void register_char_driver_qapi(const char *name, int kind,
3240 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp))
3241 {
3242 CharDriver *s;
3243
3244 s = g_malloc0(sizeof(*s));
3245 s->name = g_strdup(name);
3246 s->kind = kind;
3247 s->parse = parse;
3248
3249 backends = g_slist_append(backends, s);
3250 }
3251
3252 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3253 void (*init)(struct CharDriverState *s),
3254 Error **errp)
3255 {
3256 CharDriver *cd;
3257 CharDriverState *chr;
3258 GSList *i;
3259
3260 if (qemu_opts_id(opts) == NULL) {
3261 error_setg(errp, "chardev: no id specified");
3262 goto err;
3263 }
3264
3265 if (qemu_opt_get(opts, "backend") == NULL) {
3266 error_setg(errp, "chardev: \"%s\" missing backend",
3267 qemu_opts_id(opts));
3268 goto err;
3269 }
3270 for (i = backends; i; i = i->next) {
3271 cd = i->data;
3272
3273 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3274 break;
3275 }
3276 }
3277 if (i == NULL) {
3278 error_setg(errp, "chardev: backend \"%s\" not found",
3279 qemu_opt_get(opts, "backend"));
3280 return NULL;
3281 }
3282
3283 if (!cd->open) {
3284 /* using new, qapi init */
3285 ChardevBackend *backend = g_new0(ChardevBackend, 1);
3286 ChardevReturn *ret = NULL;
3287 const char *id = qemu_opts_id(opts);
3288 const char *bid = NULL;
3289
3290 if (qemu_opt_get_bool(opts, "mux", 0)) {
3291 bid = g_strdup_printf("%s-base", id);
3292 }
3293
3294 chr = NULL;
3295 backend->kind = cd->kind;
3296 if (cd->parse) {
3297 cd->parse(opts, backend, errp);
3298 if (error_is_set(errp)) {
3299 goto qapi_out;
3300 }
3301 }
3302 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3303 if (error_is_set(errp)) {
3304 goto qapi_out;
3305 }
3306
3307 if (bid) {
3308 qapi_free_ChardevBackend(backend);
3309 qapi_free_ChardevReturn(ret);
3310 backend = g_new0(ChardevBackend, 1);
3311 backend->mux = g_new0(ChardevMux, 1);
3312 backend->kind = CHARDEV_BACKEND_KIND_MUX;
3313 backend->mux->chardev = g_strdup(bid);
3314 ret = qmp_chardev_add(id, backend, errp);
3315 if (error_is_set(errp)) {
3316 goto qapi_out;
3317 }
3318 }
3319
3320 chr = qemu_chr_find(id);
3321
3322 qapi_out:
3323 qapi_free_ChardevBackend(backend);
3324 qapi_free_ChardevReturn(ret);
3325 return chr;
3326 }
3327
3328 chr = cd->open(opts);
3329 if (!chr) {
3330 error_setg(errp, "chardev: opening backend \"%s\" failed",
3331 qemu_opt_get(opts, "backend"));
3332 goto err;
3333 }
3334
3335 if (!chr->filename)
3336 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
3337 chr->init = init;
3338 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3339
3340 if (qemu_opt_get_bool(opts, "mux", 0)) {
3341 CharDriverState *base = chr;
3342 int len = strlen(qemu_opts_id(opts)) + 6;
3343 base->label = g_malloc(len);
3344 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
3345 chr = qemu_chr_open_mux(base);
3346 chr->filename = base->filename;
3347 chr->avail_connections = MAX_MUX;
3348 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3349 } else {
3350 chr->avail_connections = 1;
3351 }
3352 chr->label = g_strdup(qemu_opts_id(opts));
3353 chr->opts = opts;
3354 return chr;
3355
3356 err:
3357 qemu_opts_del(opts);
3358 return NULL;
3359 }
3360
3361 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3362 {
3363 const char *p;
3364 CharDriverState *chr;
3365 QemuOpts *opts;
3366 Error *err = NULL;
3367
3368 if (strstart(filename, "chardev:", &p)) {
3369 return qemu_chr_find(p);
3370 }
3371
3372 opts = qemu_chr_parse_compat(label, filename);
3373 if (!opts)
3374 return NULL;
3375
3376 chr = qemu_chr_new_from_opts(opts, init, &err);
3377 if (error_is_set(&err)) {
3378 fprintf(stderr, "%s\n", error_get_pretty(err));
3379 error_free(err);
3380 }
3381 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3382 qemu_chr_fe_claim_no_fail(chr);
3383 monitor_init(chr, MONITOR_USE_READLINE);
3384 }
3385 return chr;
3386 }
3387
3388 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3389 {
3390 if (chr->chr_set_echo) {
3391 chr->chr_set_echo(chr, echo);
3392 }
3393 }
3394
3395 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
3396 {
3397 if (chr->fe_open == fe_open) {
3398 return;
3399 }
3400 chr->fe_open = fe_open;
3401 if (chr->chr_set_fe_open) {
3402 chr->chr_set_fe_open(chr, fe_open);
3403 }
3404 }
3405
3406 int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3407 GIOFunc func, void *user_data)
3408 {
3409 GSource *src;
3410 guint tag;
3411
3412 if (s->chr_add_watch == NULL) {
3413 return -ENOSYS;
3414 }
3415
3416 src = s->chr_add_watch(s, cond);
3417 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3418 tag = g_source_attach(src, NULL);
3419 g_source_unref(src);
3420
3421 return tag;
3422 }
3423
3424 int qemu_chr_fe_claim(CharDriverState *s)
3425 {
3426 if (s->avail_connections < 1) {
3427 return -1;
3428 }
3429 s->avail_connections--;
3430 return 0;
3431 }
3432
3433 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
3434 {
3435 if (qemu_chr_fe_claim(s) != 0) {
3436 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
3437 __func__, s->label);
3438 exit(1);
3439 }
3440 }
3441
3442 void qemu_chr_fe_release(CharDriverState *s)
3443 {
3444 s->avail_connections++;
3445 }
3446
3447 void qemu_chr_delete(CharDriverState *chr)
3448 {
3449 QTAILQ_REMOVE(&chardevs, chr, next);
3450 if (chr->chr_close) {
3451 chr->chr_close(chr);
3452 }
3453 g_free(chr->filename);
3454 g_free(chr->label);
3455 if (chr->opts) {
3456 qemu_opts_del(chr->opts);
3457 }
3458 g_free(chr);
3459 }
3460
3461 ChardevInfoList *qmp_query_chardev(Error **errp)
3462 {
3463 ChardevInfoList *chr_list = NULL;
3464 CharDriverState *chr;
3465
3466 QTAILQ_FOREACH(chr, &chardevs, next) {
3467 ChardevInfoList *info = g_malloc0(sizeof(*info));
3468 info->value = g_malloc0(sizeof(*info->value));
3469 info->value->label = g_strdup(chr->label);
3470 info->value->filename = g_strdup(chr->filename);
3471
3472 info->next = chr_list;
3473 chr_list = info;
3474 }
3475
3476 return chr_list;
3477 }
3478
3479 CharDriverState *qemu_chr_find(const char *name)
3480 {
3481 CharDriverState *chr;
3482
3483 QTAILQ_FOREACH(chr, &chardevs, next) {
3484 if (strcmp(chr->label, name) != 0)
3485 continue;
3486 return chr;
3487 }
3488 return NULL;
3489 }
3490
3491 /* Get a character (serial) device interface. */
3492 CharDriverState *qemu_char_get_next_serial(void)
3493 {
3494 static int next_serial;
3495 CharDriverState *chr;
3496
3497 /* FIXME: This function needs to go away: use chardev properties! */
3498
3499 while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
3500 chr = serial_hds[next_serial++];
3501 qemu_chr_fe_claim_no_fail(chr);
3502 return chr;
3503 }
3504 return NULL;
3505 }
3506
3507 QemuOptsList qemu_chardev_opts = {
3508 .name = "chardev",
3509 .implied_opt_name = "backend",
3510 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3511 .desc = {
3512 {
3513 .name = "backend",
3514 .type = QEMU_OPT_STRING,
3515 },{
3516 .name = "path",
3517 .type = QEMU_OPT_STRING,
3518 },{
3519 .name = "host",
3520 .type = QEMU_OPT_STRING,
3521 },{
3522 .name = "port",
3523 .type = QEMU_OPT_STRING,
3524 },{
3525 .name = "localaddr",
3526 .type = QEMU_OPT_STRING,
3527 },{
3528 .name = "localport",
3529 .type = QEMU_OPT_STRING,
3530 },{
3531 .name = "to",
3532 .type = QEMU_OPT_NUMBER,
3533 },{
3534 .name = "ipv4",
3535 .type = QEMU_OPT_BOOL,
3536 },{
3537 .name = "ipv6",
3538 .type = QEMU_OPT_BOOL,
3539 },{
3540 .name = "wait",
3541 .type = QEMU_OPT_BOOL,
3542 },{
3543 .name = "server",
3544 .type = QEMU_OPT_BOOL,
3545 },{
3546 .name = "delay",
3547 .type = QEMU_OPT_BOOL,
3548 },{
3549 .name = "telnet",
3550 .type = QEMU_OPT_BOOL,
3551 },{
3552 .name = "width",
3553 .type = QEMU_OPT_NUMBER,
3554 },{
3555 .name = "height",
3556 .type = QEMU_OPT_NUMBER,
3557 },{
3558 .name = "cols",
3559 .type = QEMU_OPT_NUMBER,
3560 },{
3561 .name = "rows",
3562 .type = QEMU_OPT_NUMBER,
3563 },{
3564 .name = "mux",
3565 .type = QEMU_OPT_BOOL,
3566 },{
3567 .name = "signal",
3568 .type = QEMU_OPT_BOOL,
3569 },{
3570 .name = "name",
3571 .type = QEMU_OPT_STRING,
3572 },{
3573 .name = "debug",
3574 .type = QEMU_OPT_NUMBER,
3575 },{
3576 .name = "size",
3577 .type = QEMU_OPT_SIZE,
3578 },
3579 { /* end of list */ }
3580 },
3581 };
3582
3583 #ifdef _WIN32
3584
3585 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3586 {
3587 HANDLE out;
3588
3589 if (file->in) {
3590 error_setg(errp, "input file not supported");
3591 return NULL;
3592 }
3593
3594 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
3595 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
3596 if (out == INVALID_HANDLE_VALUE) {
3597 error_setg(errp, "open %s failed", file->out);
3598 return NULL;
3599 }
3600 return qemu_chr_open_win_file(out);
3601 }
3602
3603 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3604 Error **errp)
3605 {
3606 return qemu_chr_open_win_path(serial->device);
3607 }
3608
3609 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3610 Error **errp)
3611 {
3612 error_setg(errp, "character device backend type 'parallel' not supported");
3613 return NULL;
3614 }
3615
3616 #else /* WIN32 */
3617
3618 static int qmp_chardev_open_file_source(char *src, int flags,
3619 Error **errp)
3620 {
3621 int fd = -1;
3622
3623 TFR(fd = qemu_open(src, flags, 0666));
3624 if (fd == -1) {
3625 error_setg(errp, "open %s: %s", src, strerror(errno));
3626 }
3627 return fd;
3628 }
3629
3630 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3631 {
3632 int flags, in = -1, out = -1;
3633
3634 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
3635 out = qmp_chardev_open_file_source(file->out, flags, errp);
3636 if (error_is_set(errp)) {
3637 return NULL;
3638 }
3639
3640 if (file->in) {
3641 flags = O_RDONLY;
3642 in = qmp_chardev_open_file_source(file->in, flags, errp);
3643 if (error_is_set(errp)) {
3644 qemu_close(out);
3645 return NULL;
3646 }
3647 }
3648
3649 return qemu_chr_open_fd(in, out);
3650 }
3651
3652 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3653 Error **errp)
3654 {
3655 #ifdef HAVE_CHARDEV_TTY
3656 int fd;
3657
3658 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
3659 if (error_is_set(errp)) {
3660 return NULL;
3661 }
3662 qemu_set_nonblock(fd);
3663 return qemu_chr_open_tty_fd(fd);
3664 #else
3665 error_setg(errp, "character device backend type 'serial' not supported");
3666 return NULL;
3667 #endif
3668 }
3669
3670 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3671 Error **errp)
3672 {
3673 #ifdef HAVE_CHARDEV_PARPORT
3674 int fd;
3675
3676 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
3677 if (error_is_set(errp)) {
3678 return NULL;
3679 }
3680 return qemu_chr_open_pp_fd(fd);
3681 #else
3682 error_setg(errp, "character device backend type 'parallel' not supported");
3683 return NULL;
3684 #endif
3685 }
3686
3687 #endif /* WIN32 */
3688
3689 static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
3690 Error **errp)
3691 {
3692 SocketAddress *addr = sock->addr;
3693 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
3694 bool is_listen = sock->has_server ? sock->server : true;
3695 bool is_telnet = sock->has_telnet ? sock->telnet : false;
3696 bool is_waitconnect = sock->has_wait ? sock->wait : false;
3697 int fd;
3698
3699 if (is_listen) {
3700 fd = socket_listen(addr, errp);
3701 } else {
3702 fd = socket_connect(addr, errp, NULL, NULL);
3703 }
3704 if (error_is_set(errp)) {
3705 return NULL;
3706 }
3707 return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
3708 is_telnet, is_waitconnect, errp);
3709 }
3710
3711 static CharDriverState *qmp_chardev_open_dgram(ChardevDgram *dgram,
3712 Error **errp)
3713 {
3714 int fd;
3715
3716 fd = socket_dgram(dgram->remote, dgram->local, errp);
3717 if (error_is_set(errp)) {
3718 return NULL;
3719 }
3720 return qemu_chr_open_udp_fd(fd);
3721 }
3722
3723 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
3724 Error **errp)
3725 {
3726 ChardevReturn *ret = g_new0(ChardevReturn, 1);
3727 CharDriverState *base, *chr = NULL;
3728
3729 chr = qemu_chr_find(id);
3730 if (chr) {
3731 error_setg(errp, "Chardev '%s' already exists", id);
3732 g_free(ret);
3733 return NULL;
3734 }
3735
3736 switch (backend->kind) {
3737 case CHARDEV_BACKEND_KIND_FILE:
3738 chr = qmp_chardev_open_file(backend->file, errp);
3739 break;
3740 case CHARDEV_BACKEND_KIND_SERIAL:
3741 chr = qmp_chardev_open_serial(backend->serial, errp);
3742 break;
3743 case CHARDEV_BACKEND_KIND_PARALLEL:
3744 chr = qmp_chardev_open_parallel(backend->parallel, errp);
3745 break;
3746 case CHARDEV_BACKEND_KIND_PIPE:
3747 chr = qemu_chr_open_pipe(backend->pipe);
3748 break;
3749 case CHARDEV_BACKEND_KIND_SOCKET:
3750 chr = qmp_chardev_open_socket(backend->socket, errp);
3751 break;
3752 case CHARDEV_BACKEND_KIND_DGRAM:
3753 chr = qmp_chardev_open_dgram(backend->dgram, errp);
3754 break;
3755 #ifdef HAVE_CHARDEV_TTY
3756 case CHARDEV_BACKEND_KIND_PTY:
3757 chr = qemu_chr_open_pty(id, ret);
3758 break;
3759 #endif
3760 case CHARDEV_BACKEND_KIND_NULL:
3761 chr = qemu_chr_open_null();
3762 break;
3763 case CHARDEV_BACKEND_KIND_MUX:
3764 base = qemu_chr_find(backend->mux->chardev);
3765 if (base == NULL) {
3766 error_setg(errp, "mux: base chardev %s not found",
3767 backend->mux->chardev);
3768 break;
3769 }
3770 chr = qemu_chr_open_mux(base);
3771 break;
3772 case CHARDEV_BACKEND_KIND_MSMOUSE:
3773 chr = qemu_chr_open_msmouse();
3774 break;
3775 #ifdef CONFIG_BRLAPI
3776 case CHARDEV_BACKEND_KIND_BRAILLE:
3777 chr = chr_baum_init();
3778 break;
3779 #endif
3780 case CHARDEV_BACKEND_KIND_STDIO:
3781 chr = qemu_chr_open_stdio(backend->stdio);
3782 break;
3783 #ifdef _WIN32
3784 case CHARDEV_BACKEND_KIND_CONSOLE:
3785 chr = qemu_chr_open_win_con();
3786 break;
3787 #endif
3788 #ifdef CONFIG_SPICE
3789 case CHARDEV_BACKEND_KIND_SPICEVMC:
3790 chr = qemu_chr_open_spice_vmc(backend->spicevmc->type);
3791 break;
3792 case CHARDEV_BACKEND_KIND_SPICEPORT:
3793 chr = qemu_chr_open_spice_port(backend->spiceport->fqdn);
3794 break;
3795 #endif
3796 case CHARDEV_BACKEND_KIND_VC:
3797 chr = vc_init(backend->vc);
3798 break;
3799 case CHARDEV_BACKEND_KIND_MEMORY:
3800 chr = qemu_chr_open_ringbuf(backend->memory, errp);
3801 break;
3802 default:
3803 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
3804 break;
3805 }
3806
3807 if (chr == NULL && !error_is_set(errp)) {
3808 error_setg(errp, "Failed to create chardev");
3809 }
3810 if (chr) {
3811 chr->label = g_strdup(id);
3812 chr->avail_connections =
3813 (backend->kind == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
3814 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3815 return ret;
3816 } else {
3817 g_free(ret);
3818 return NULL;
3819 }
3820 }
3821
3822 void qmp_chardev_remove(const char *id, Error **errp)
3823 {
3824 CharDriverState *chr;
3825
3826 chr = qemu_chr_find(id);
3827 if (NULL == chr) {
3828 error_setg(errp, "Chardev '%s' not found", id);
3829 return;
3830 }
3831 if (chr->chr_can_read || chr->chr_read ||
3832 chr->chr_event || chr->handler_opaque) {
3833 error_setg(errp, "Chardev '%s' is busy", id);
3834 return;
3835 }
3836 qemu_chr_delete(chr);
3837 }
3838
3839 static void register_types(void)
3840 {
3841 register_char_driver_qapi("null", CHARDEV_BACKEND_KIND_NULL, NULL);
3842 register_char_driver("socket", qemu_chr_open_socket);
3843 register_char_driver("udp", qemu_chr_open_udp);
3844 register_char_driver_qapi("memory", CHARDEV_BACKEND_KIND_MEMORY,
3845 qemu_chr_parse_ringbuf);
3846 register_char_driver_qapi("file", CHARDEV_BACKEND_KIND_FILE,
3847 qemu_chr_parse_file_out);
3848 register_char_driver_qapi("stdio", CHARDEV_BACKEND_KIND_STDIO,
3849 qemu_chr_parse_stdio);
3850 register_char_driver_qapi("serial", CHARDEV_BACKEND_KIND_SERIAL,
3851 qemu_chr_parse_serial);
3852 register_char_driver_qapi("tty", CHARDEV_BACKEND_KIND_SERIAL,
3853 qemu_chr_parse_serial);
3854 register_char_driver_qapi("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
3855 qemu_chr_parse_parallel);
3856 register_char_driver_qapi("parport", CHARDEV_BACKEND_KIND_PARALLEL,
3857 qemu_chr_parse_parallel);
3858 register_char_driver_qapi("pty", CHARDEV_BACKEND_KIND_PTY, NULL);
3859 register_char_driver_qapi("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL);
3860 register_char_driver_qapi("pipe", CHARDEV_BACKEND_KIND_PIPE,
3861 qemu_chr_parse_pipe);
3862 }
3863
3864 type_init(register_types);
QEMU modified to work with kvm