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wdt_i6300esb: fix vmstate versioning
[qemu.git] / qemu-char.c
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu-common.h"
25 #include "monitor/monitor.h"
26 #include "ui/console.h"
27 #include "sysemu/sysemu.h"
28 #include "qemu/timer.h"
29 #include "sysemu/char.h"
30 #include "hw/usb.h"
31 #include "qmp-commands.h"
32
33 #include <unistd.h>
34 #include <fcntl.h>
35 #include <time.h>
36 #include <errno.h>
37 #include <sys/time.h>
38 #include <zlib.h>
39
40 #ifndef _WIN32
41 #include <sys/times.h>
42 #include <sys/wait.h>
43 #include <termios.h>
44 #include <sys/mman.h>
45 #include <sys/ioctl.h>
46 #include <sys/resource.h>
47 #include <sys/socket.h>
48 #include <netinet/in.h>
49 #include <net/if.h>
50 #include <arpa/inet.h>
51 #include <dirent.h>
52 #include <netdb.h>
53 #include <sys/select.h>
54 #ifdef CONFIG_BSD
55 #include <sys/stat.h>
56 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
57 #include <dev/ppbus/ppi.h>
58 #include <dev/ppbus/ppbconf.h>
59 #elif defined(__DragonFly__)
60 #include <dev/misc/ppi/ppi.h>
61 #include <bus/ppbus/ppbconf.h>
62 #endif
63 #else
64 #ifdef __linux__
65 #include <linux/ppdev.h>
66 #include <linux/parport.h>
67 #endif
68 #ifdef __sun__
69 #include <sys/stat.h>
70 #include <sys/ethernet.h>
71 #include <sys/sockio.h>
72 #include <netinet/arp.h>
73 #include <netinet/in.h>
74 #include <netinet/in_systm.h>
75 #include <netinet/ip.h>
76 #include <netinet/ip_icmp.h> // must come after ip.h
77 #include <netinet/udp.h>
78 #include <netinet/tcp.h>
79 #include <net/if.h>
80 #include <syslog.h>
81 #endif
82 #endif
83 #endif
84
85 #include "qemu/sockets.h"
86 #include "ui/qemu-spice.h"
87
88 #define READ_BUF_LEN 4096
89
90 /***********************************************************/
91 /* character device */
92
93 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
94 QTAILQ_HEAD_INITIALIZER(chardevs);
95
96 void qemu_chr_be_event(CharDriverState *s, int event)
97 {
98 /* Keep track if the char device is open */
99 switch (event) {
100 case CHR_EVENT_OPENED:
101 s->be_open = 1;
102 break;
103 case CHR_EVENT_CLOSED:
104 s->be_open = 0;
105 break;
106 }
107
108 if (!s->chr_event)
109 return;
110 s->chr_event(s->handler_opaque, event);
111 }
112
113 void qemu_chr_be_generic_open(CharDriverState *s)
114 {
115 qemu_chr_be_event(s, CHR_EVENT_OPENED);
116 }
117
118 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
119 {
120 return s->chr_write(s, buf, len);
121 }
122
123 int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len)
124 {
125 int offset = 0;
126 int res;
127
128 while (offset < len) {
129 do {
130 res = s->chr_write(s, buf + offset, len - offset);
131 if (res == -1 && errno == EAGAIN) {
132 g_usleep(100);
133 }
134 } while (res == -1 && errno == EAGAIN);
135
136 if (res == 0) {
137 break;
138 }
139
140 if (res < 0) {
141 return res;
142 }
143
144 offset += res;
145 }
146
147 return offset;
148 }
149
150 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
151 {
152 if (!s->chr_ioctl)
153 return -ENOTSUP;
154 return s->chr_ioctl(s, cmd, arg);
155 }
156
157 int qemu_chr_be_can_write(CharDriverState *s)
158 {
159 if (!s->chr_can_read)
160 return 0;
161 return s->chr_can_read(s->handler_opaque);
162 }
163
164 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
165 {
166 if (s->chr_read) {
167 s->chr_read(s->handler_opaque, buf, len);
168 }
169 }
170
171 int qemu_chr_fe_get_msgfd(CharDriverState *s)
172 {
173 return s->get_msgfd ? s->get_msgfd(s) : -1;
174 }
175
176 int qemu_chr_add_client(CharDriverState *s, int fd)
177 {
178 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
179 }
180
181 void qemu_chr_accept_input(CharDriverState *s)
182 {
183 if (s->chr_accept_input)
184 s->chr_accept_input(s);
185 qemu_notify_event();
186 }
187
188 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
189 {
190 char buf[READ_BUF_LEN];
191 va_list ap;
192 va_start(ap, fmt);
193 vsnprintf(buf, sizeof(buf), fmt, ap);
194 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
195 va_end(ap);
196 }
197
198 void qemu_chr_add_handlers(CharDriverState *s,
199 IOCanReadHandler *fd_can_read,
200 IOReadHandler *fd_read,
201 IOEventHandler *fd_event,
202 void *opaque)
203 {
204 int fe_open;
205
206 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
207 fe_open = 0;
208 } else {
209 fe_open = 1;
210 }
211 s->chr_can_read = fd_can_read;
212 s->chr_read = fd_read;
213 s->chr_event = fd_event;
214 s->handler_opaque = opaque;
215 if (s->chr_update_read_handler)
216 s->chr_update_read_handler(s);
217
218 if (!s->explicit_fe_open) {
219 qemu_chr_fe_set_open(s, fe_open);
220 }
221
222 /* We're connecting to an already opened device, so let's make sure we
223 also get the open event */
224 if (fe_open && s->be_open) {
225 qemu_chr_be_generic_open(s);
226 }
227 }
228
229 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
230 {
231 return len;
232 }
233
234 static CharDriverState *qemu_chr_open_null(void)
235 {
236 CharDriverState *chr;
237
238 chr = g_malloc0(sizeof(CharDriverState));
239 chr->chr_write = null_chr_write;
240 chr->explicit_be_open = true;
241 return chr;
242 }
243
244 /* MUX driver for serial I/O splitting */
245 #define MAX_MUX 4
246 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
247 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
248 typedef struct {
249 IOCanReadHandler *chr_can_read[MAX_MUX];
250 IOReadHandler *chr_read[MAX_MUX];
251 IOEventHandler *chr_event[MAX_MUX];
252 void *ext_opaque[MAX_MUX];
253 CharDriverState *drv;
254 int focus;
255 int mux_cnt;
256 int term_got_escape;
257 int max_size;
258 /* Intermediate input buffer allows to catch escape sequences even if the
259 currently active device is not accepting any input - but only until it
260 is full as well. */
261 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
262 int prod[MAX_MUX];
263 int cons[MAX_MUX];
264 int timestamps;
265 int linestart;
266 int64_t timestamps_start;
267 } MuxDriver;
268
269
270 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
271 {
272 MuxDriver *d = chr->opaque;
273 int ret;
274 if (!d->timestamps) {
275 ret = d->drv->chr_write(d->drv, buf, len);
276 } else {
277 int i;
278
279 ret = 0;
280 for (i = 0; i < len; i++) {
281 if (d->linestart) {
282 char buf1[64];
283 int64_t ti;
284 int secs;
285
286 ti = qemu_get_clock_ms(rt_clock);
287 if (d->timestamps_start == -1)
288 d->timestamps_start = ti;
289 ti -= d->timestamps_start;
290 secs = ti / 1000;
291 snprintf(buf1, sizeof(buf1),
292 "[%02d:%02d:%02d.%03d] ",
293 secs / 3600,
294 (secs / 60) % 60,
295 secs % 60,
296 (int)(ti % 1000));
297 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
298 d->linestart = 0;
299 }
300 ret += d->drv->chr_write(d->drv, buf+i, 1);
301 if (buf[i] == '\n') {
302 d->linestart = 1;
303 }
304 }
305 }
306 return ret;
307 }
308
309 static const char * const mux_help[] = {
310 "% h print this help\n\r",
311 "% x exit emulator\n\r",
312 "% s save disk data back to file (if -snapshot)\n\r",
313 "% t toggle console timestamps\n\r"
314 "% b send break (magic sysrq)\n\r",
315 "% c switch between console and monitor\n\r",
316 "% % sends %\n\r",
317 NULL
318 };
319
320 int term_escape_char = 0x01; /* ctrl-a is used for escape */
321 static void mux_print_help(CharDriverState *chr)
322 {
323 int i, j;
324 char ebuf[15] = "Escape-Char";
325 char cbuf[50] = "\n\r";
326
327 if (term_escape_char > 0 && term_escape_char < 26) {
328 snprintf(cbuf, sizeof(cbuf), "\n\r");
329 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
330 } else {
331 snprintf(cbuf, sizeof(cbuf),
332 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
333 term_escape_char);
334 }
335 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
336 for (i = 0; mux_help[i] != NULL; i++) {
337 for (j=0; mux_help[i][j] != '\0'; j++) {
338 if (mux_help[i][j] == '%')
339 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
340 else
341 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
342 }
343 }
344 }
345
346 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
347 {
348 if (d->chr_event[mux_nr])
349 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
350 }
351
352 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
353 {
354 if (d->term_got_escape) {
355 d->term_got_escape = 0;
356 if (ch == term_escape_char)
357 goto send_char;
358 switch(ch) {
359 case '?':
360 case 'h':
361 mux_print_help(chr);
362 break;
363 case 'x':
364 {
365 const char *term = "QEMU: Terminated\n\r";
366 chr->chr_write(chr,(uint8_t *)term,strlen(term));
367 exit(0);
368 break;
369 }
370 case 's':
371 bdrv_commit_all();
372 break;
373 case 'b':
374 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
375 break;
376 case 'c':
377 /* Switch to the next registered device */
378 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
379 d->focus++;
380 if (d->focus >= d->mux_cnt)
381 d->focus = 0;
382 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
383 break;
384 case 't':
385 d->timestamps = !d->timestamps;
386 d->timestamps_start = -1;
387 d->linestart = 0;
388 break;
389 }
390 } else if (ch == term_escape_char) {
391 d->term_got_escape = 1;
392 } else {
393 send_char:
394 return 1;
395 }
396 return 0;
397 }
398
399 static void mux_chr_accept_input(CharDriverState *chr)
400 {
401 MuxDriver *d = chr->opaque;
402 int m = d->focus;
403
404 while (d->prod[m] != d->cons[m] &&
405 d->chr_can_read[m] &&
406 d->chr_can_read[m](d->ext_opaque[m])) {
407 d->chr_read[m](d->ext_opaque[m],
408 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
409 }
410 }
411
412 static int mux_chr_can_read(void *opaque)
413 {
414 CharDriverState *chr = opaque;
415 MuxDriver *d = chr->opaque;
416 int m = d->focus;
417
418 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
419 return 1;
420 if (d->chr_can_read[m])
421 return d->chr_can_read[m](d->ext_opaque[m]);
422 return 0;
423 }
424
425 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
426 {
427 CharDriverState *chr = opaque;
428 MuxDriver *d = chr->opaque;
429 int m = d->focus;
430 int i;
431
432 mux_chr_accept_input (opaque);
433
434 for(i = 0; i < size; i++)
435 if (mux_proc_byte(chr, d, buf[i])) {
436 if (d->prod[m] == d->cons[m] &&
437 d->chr_can_read[m] &&
438 d->chr_can_read[m](d->ext_opaque[m]))
439 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
440 else
441 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
442 }
443 }
444
445 static void mux_chr_event(void *opaque, int event)
446 {
447 CharDriverState *chr = opaque;
448 MuxDriver *d = chr->opaque;
449 int i;
450
451 /* Send the event to all registered listeners */
452 for (i = 0; i < d->mux_cnt; i++)
453 mux_chr_send_event(d, i, event);
454 }
455
456 static void mux_chr_update_read_handler(CharDriverState *chr)
457 {
458 MuxDriver *d = chr->opaque;
459
460 if (d->mux_cnt >= MAX_MUX) {
461 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
462 return;
463 }
464 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
465 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
466 d->chr_read[d->mux_cnt] = chr->chr_read;
467 d->chr_event[d->mux_cnt] = chr->chr_event;
468 /* Fix up the real driver with mux routines */
469 if (d->mux_cnt == 0) {
470 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
471 mux_chr_event, chr);
472 }
473 if (d->focus != -1) {
474 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
475 }
476 d->focus = d->mux_cnt;
477 d->mux_cnt++;
478 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
479 }
480
481 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
482 {
483 CharDriverState *chr;
484 MuxDriver *d;
485
486 chr = g_malloc0(sizeof(CharDriverState));
487 d = g_malloc0(sizeof(MuxDriver));
488
489 chr->opaque = d;
490 d->drv = drv;
491 d->focus = -1;
492 chr->chr_write = mux_chr_write;
493 chr->chr_update_read_handler = mux_chr_update_read_handler;
494 chr->chr_accept_input = mux_chr_accept_input;
495 /* Frontend guest-open / -close notification is not support with muxes */
496 chr->chr_set_fe_open = NULL;
497
498 return chr;
499 }
500
501
502 #ifdef _WIN32
503 int send_all(int fd, const void *buf, int len1)
504 {
505 int ret, len;
506
507 len = len1;
508 while (len > 0) {
509 ret = send(fd, buf, len, 0);
510 if (ret < 0) {
511 errno = WSAGetLastError();
512 if (errno != WSAEWOULDBLOCK) {
513 return -1;
514 }
515 } else if (ret == 0) {
516 break;
517 } else {
518 buf += ret;
519 len -= ret;
520 }
521 }
522 return len1 - len;
523 }
524
525 #else
526
527 int send_all(int fd, const void *_buf, int len1)
528 {
529 int ret, len;
530 const uint8_t *buf = _buf;
531
532 len = len1;
533 while (len > 0) {
534 ret = write(fd, buf, len);
535 if (ret < 0) {
536 if (errno != EINTR && errno != EAGAIN)
537 return -1;
538 } else if (ret == 0) {
539 break;
540 } else {
541 buf += ret;
542 len -= ret;
543 }
544 }
545 return len1 - len;
546 }
547
548 int recv_all(int fd, void *_buf, int len1, bool single_read)
549 {
550 int ret, len;
551 uint8_t *buf = _buf;
552
553 len = len1;
554 while ((len > 0) && (ret = read(fd, buf, len)) != 0) {
555 if (ret < 0) {
556 if (errno != EINTR && errno != EAGAIN) {
557 return -1;
558 }
559 continue;
560 } else {
561 if (single_read) {
562 return ret;
563 }
564 buf += ret;
565 len -= ret;
566 }
567 }
568 return len1 - len;
569 }
570
571 #endif /* !_WIN32 */
572
573 typedef struct IOWatchPoll
574 {
575 GSource parent;
576
577 GIOChannel *channel;
578 GSource *src;
579
580 IOCanReadHandler *fd_can_read;
581 GSourceFunc fd_read;
582 void *opaque;
583 } IOWatchPoll;
584
585 static IOWatchPoll *io_watch_poll_from_source(GSource *source)
586 {
587 return container_of(source, IOWatchPoll, parent);
588 }
589
590 static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_)
591 {
592 IOWatchPoll *iwp = io_watch_poll_from_source(source);
593 bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
594 bool was_active = iwp->src != NULL;
595 if (was_active == now_active) {
596 return FALSE;
597 }
598
599 if (now_active) {
600 iwp->src = g_io_create_watch(iwp->channel, G_IO_IN | G_IO_ERR | G_IO_HUP);
601 g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
602 g_source_attach(iwp->src, NULL);
603 } else {
604 g_source_destroy(iwp->src);
605 g_source_unref(iwp->src);
606 iwp->src = NULL;
607 }
608 return FALSE;
609 }
610
611 static gboolean io_watch_poll_check(GSource *source)
612 {
613 return FALSE;
614 }
615
616 static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
617 gpointer user_data)
618 {
619 abort();
620 }
621
622 static void io_watch_poll_finalize(GSource *source)
623 {
624 /* Due to a glib bug, removing the last reference to a source
625 * inside a finalize callback causes recursive locking (and a
626 * deadlock). This is not a problem inside other callbacks,
627 * including dispatch callbacks, so we call io_remove_watch_poll
628 * to remove this source. At this point, iwp->src must
629 * be NULL, or we would leak it.
630 *
631 * This would be solved much more elegantly by child sources,
632 * but we support older glib versions that do not have them.
633 */
634 IOWatchPoll *iwp = io_watch_poll_from_source(source);
635 assert(iwp->src == NULL);
636 }
637
638 static GSourceFuncs io_watch_poll_funcs = {
639 .prepare = io_watch_poll_prepare,
640 .check = io_watch_poll_check,
641 .dispatch = io_watch_poll_dispatch,
642 .finalize = io_watch_poll_finalize,
643 };
644
645 /* Can only be used for read */
646 static guint io_add_watch_poll(GIOChannel *channel,
647 IOCanReadHandler *fd_can_read,
648 GIOFunc fd_read,
649 gpointer user_data)
650 {
651 IOWatchPoll *iwp;
652 int tag;
653
654 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll));
655 iwp->fd_can_read = fd_can_read;
656 iwp->opaque = user_data;
657 iwp->channel = channel;
658 iwp->fd_read = (GSourceFunc) fd_read;
659 iwp->src = NULL;
660
661 tag = g_source_attach(&iwp->parent, NULL);
662 g_source_unref(&iwp->parent);
663 return tag;
664 }
665
666 static void io_remove_watch_poll(guint tag)
667 {
668 GSource *source;
669 IOWatchPoll *iwp;
670
671 g_return_if_fail (tag > 0);
672
673 source = g_main_context_find_source_by_id(NULL, tag);
674 g_return_if_fail (source != NULL);
675
676 iwp = io_watch_poll_from_source(source);
677 if (iwp->src) {
678 g_source_destroy(iwp->src);
679 g_source_unref(iwp->src);
680 iwp->src = NULL;
681 }
682 g_source_destroy(&iwp->parent);
683 }
684
685 #ifndef _WIN32
686 static GIOChannel *io_channel_from_fd(int fd)
687 {
688 GIOChannel *chan;
689
690 if (fd == -1) {
691 return NULL;
692 }
693
694 chan = g_io_channel_unix_new(fd);
695
696 g_io_channel_set_encoding(chan, NULL, NULL);
697 g_io_channel_set_buffered(chan, FALSE);
698
699 return chan;
700 }
701 #endif
702
703 static GIOChannel *io_channel_from_socket(int fd)
704 {
705 GIOChannel *chan;
706
707 if (fd == -1) {
708 return NULL;
709 }
710
711 #ifdef _WIN32
712 chan = g_io_channel_win32_new_socket(fd);
713 #else
714 chan = g_io_channel_unix_new(fd);
715 #endif
716
717 g_io_channel_set_encoding(chan, NULL, NULL);
718 g_io_channel_set_buffered(chan, FALSE);
719
720 return chan;
721 }
722
723 static int io_channel_send(GIOChannel *fd, const void *buf, size_t len)
724 {
725 GIOStatus status;
726 size_t offset;
727
728 offset = 0;
729 while (offset < len) {
730 gsize bytes_written;
731
732 status = g_io_channel_write_chars(fd, buf + offset, len - offset,
733 &bytes_written, NULL);
734 if (status != G_IO_STATUS_NORMAL) {
735 if (status == G_IO_STATUS_AGAIN) {
736 /* If we've written any data, return a partial write. */
737 if (offset) {
738 break;
739 }
740 errno = EAGAIN;
741 } else {
742 errno = EINVAL;
743 }
744
745 return -1;
746 } else if (status == G_IO_STATUS_EOF) {
747 break;
748 }
749
750 offset += bytes_written;
751 }
752
753 return offset;
754 }
755
756 #ifndef _WIN32
757
758 typedef struct FDCharDriver {
759 CharDriverState *chr;
760 GIOChannel *fd_in, *fd_out;
761 guint fd_in_tag;
762 int max_size;
763 QTAILQ_ENTRY(FDCharDriver) node;
764 } FDCharDriver;
765
766 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
767 {
768 FDCharDriver *s = chr->opaque;
769
770 return io_channel_send(s->fd_out, buf, len);
771 }
772
773 static gboolean fd_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
774 {
775 CharDriverState *chr = opaque;
776 FDCharDriver *s = chr->opaque;
777 int len;
778 uint8_t buf[READ_BUF_LEN];
779 GIOStatus status;
780 gsize bytes_read;
781
782 len = sizeof(buf);
783 if (len > s->max_size) {
784 len = s->max_size;
785 }
786 if (len == 0) {
787 return TRUE;
788 }
789
790 status = g_io_channel_read_chars(chan, (gchar *)buf,
791 len, &bytes_read, NULL);
792 if (status == G_IO_STATUS_EOF) {
793 if (s->fd_in_tag) {
794 io_remove_watch_poll(s->fd_in_tag);
795 s->fd_in_tag = 0;
796 }
797 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
798 return FALSE;
799 }
800 if (status == G_IO_STATUS_NORMAL) {
801 qemu_chr_be_write(chr, buf, bytes_read);
802 }
803
804 return TRUE;
805 }
806
807 static int fd_chr_read_poll(void *opaque)
808 {
809 CharDriverState *chr = opaque;
810 FDCharDriver *s = chr->opaque;
811
812 s->max_size = qemu_chr_be_can_write(chr);
813 return s->max_size;
814 }
815
816 static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
817 {
818 FDCharDriver *s = chr->opaque;
819 return g_io_create_watch(s->fd_out, cond);
820 }
821
822 static void fd_chr_update_read_handler(CharDriverState *chr)
823 {
824 FDCharDriver *s = chr->opaque;
825
826 if (s->fd_in_tag) {
827 io_remove_watch_poll(s->fd_in_tag);
828 s->fd_in_tag = 0;
829 }
830
831 if (s->fd_in) {
832 s->fd_in_tag = io_add_watch_poll(s->fd_in, fd_chr_read_poll, fd_chr_read, chr);
833 }
834 }
835
836 static void fd_chr_close(struct CharDriverState *chr)
837 {
838 FDCharDriver *s = chr->opaque;
839
840 if (s->fd_in_tag) {
841 io_remove_watch_poll(s->fd_in_tag);
842 s->fd_in_tag = 0;
843 }
844
845 if (s->fd_in) {
846 g_io_channel_unref(s->fd_in);
847 }
848 if (s->fd_out) {
849 g_io_channel_unref(s->fd_out);
850 }
851
852 g_free(s);
853 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
854 }
855
856 /* open a character device to a unix fd */
857 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
858 {
859 CharDriverState *chr;
860 FDCharDriver *s;
861
862 chr = g_malloc0(sizeof(CharDriverState));
863 s = g_malloc0(sizeof(FDCharDriver));
864 s->fd_in = io_channel_from_fd(fd_in);
865 s->fd_out = io_channel_from_fd(fd_out);
866 fcntl(fd_out, F_SETFL, O_NONBLOCK);
867 s->chr = chr;
868 chr->opaque = s;
869 chr->chr_add_watch = fd_chr_add_watch;
870 chr->chr_write = fd_chr_write;
871 chr->chr_update_read_handler = fd_chr_update_read_handler;
872 chr->chr_close = fd_chr_close;
873
874 return chr;
875 }
876
877 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
878 {
879 int fd_in, fd_out;
880 char filename_in[256], filename_out[256];
881 const char *filename = opts->device;
882
883 if (filename == NULL) {
884 fprintf(stderr, "chardev: pipe: no filename given\n");
885 return NULL;
886 }
887
888 snprintf(filename_in, 256, "%s.in", filename);
889 snprintf(filename_out, 256, "%s.out", filename);
890 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
891 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
892 if (fd_in < 0 || fd_out < 0) {
893 if (fd_in >= 0)
894 close(fd_in);
895 if (fd_out >= 0)
896 close(fd_out);
897 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
898 if (fd_in < 0) {
899 return NULL;
900 }
901 }
902 return qemu_chr_open_fd(fd_in, fd_out);
903 }
904
905 /* init terminal so that we can grab keys */
906 static struct termios oldtty;
907 static int old_fd0_flags;
908 static bool stdio_allow_signal;
909
910 static void term_exit(void)
911 {
912 tcsetattr (0, TCSANOW, &oldtty);
913 fcntl(0, F_SETFL, old_fd0_flags);
914 }
915
916 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
917 {
918 struct termios tty;
919
920 tty = oldtty;
921 if (!echo) {
922 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
923 |INLCR|IGNCR|ICRNL|IXON);
924 tty.c_oflag |= OPOST;
925 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
926 tty.c_cflag &= ~(CSIZE|PARENB);
927 tty.c_cflag |= CS8;
928 tty.c_cc[VMIN] = 1;
929 tty.c_cc[VTIME] = 0;
930 }
931 /* if graphical mode, we allow Ctrl-C handling */
932 if (!stdio_allow_signal)
933 tty.c_lflag &= ~ISIG;
934
935 tcsetattr (0, TCSANOW, &tty);
936 }
937
938 static void qemu_chr_close_stdio(struct CharDriverState *chr)
939 {
940 term_exit();
941 fd_chr_close(chr);
942 }
943
944 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
945 {
946 CharDriverState *chr;
947
948 if (is_daemonized()) {
949 error_report("cannot use stdio with -daemonize");
950 return NULL;
951 }
952 old_fd0_flags = fcntl(0, F_GETFL);
953 tcgetattr (0, &oldtty);
954 fcntl(0, F_SETFL, O_NONBLOCK);
955 atexit(term_exit);
956
957 chr = qemu_chr_open_fd(0, 1);
958 chr->chr_close = qemu_chr_close_stdio;
959 chr->chr_set_echo = qemu_chr_set_echo_stdio;
960 stdio_allow_signal = display_type != DT_NOGRAPHIC;
961 if (opts->has_signal) {
962 stdio_allow_signal = opts->signal;
963 }
964 qemu_chr_fe_set_echo(chr, false);
965
966 return chr;
967 }
968
969 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
970 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
971 || defined(__GLIBC__)
972
973 #define HAVE_CHARDEV_TTY 1
974
975 typedef struct {
976 GIOChannel *fd;
977 guint fd_tag;
978 int connected;
979 int read_bytes;
980 guint timer_tag;
981 } PtyCharDriver;
982
983 static void pty_chr_update_read_handler(CharDriverState *chr);
984 static void pty_chr_state(CharDriverState *chr, int connected);
985
986 static gboolean pty_chr_timer(gpointer opaque)
987 {
988 struct CharDriverState *chr = opaque;
989 PtyCharDriver *s = chr->opaque;
990
991 if (s->connected) {
992 goto out;
993 }
994
995 /* Next poll ... */
996 pty_chr_update_read_handler(chr);
997
998 out:
999 s->timer_tag = 0;
1000 return FALSE;
1001 }
1002
1003 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1004 {
1005 PtyCharDriver *s = chr->opaque;
1006
1007 if (s->timer_tag) {
1008 g_source_remove(s->timer_tag);
1009 s->timer_tag = 0;
1010 }
1011
1012 if (ms == 1000) {
1013 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1014 } else {
1015 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1016 }
1017 }
1018
1019 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1020 {
1021 PtyCharDriver *s = chr->opaque;
1022
1023 if (!s->connected) {
1024 /* guest sends data, check for (re-)connect */
1025 pty_chr_update_read_handler(chr);
1026 return 0;
1027 }
1028 return io_channel_send(s->fd, buf, len);
1029 }
1030
1031 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1032 {
1033 PtyCharDriver *s = chr->opaque;
1034 return g_io_create_watch(s->fd, cond);
1035 }
1036
1037 static int pty_chr_read_poll(void *opaque)
1038 {
1039 CharDriverState *chr = opaque;
1040 PtyCharDriver *s = chr->opaque;
1041
1042 s->read_bytes = qemu_chr_be_can_write(chr);
1043 return s->read_bytes;
1044 }
1045
1046 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1047 {
1048 CharDriverState *chr = opaque;
1049 PtyCharDriver *s = chr->opaque;
1050 gsize size, len;
1051 uint8_t buf[READ_BUF_LEN];
1052 GIOStatus status;
1053
1054 len = sizeof(buf);
1055 if (len > s->read_bytes)
1056 len = s->read_bytes;
1057 if (len == 0) {
1058 return TRUE;
1059 }
1060 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1061 if (status != G_IO_STATUS_NORMAL) {
1062 pty_chr_state(chr, 0);
1063 return FALSE;
1064 } else {
1065 pty_chr_state(chr, 1);
1066 qemu_chr_be_write(chr, buf, size);
1067 }
1068 return TRUE;
1069 }
1070
1071 static void pty_chr_update_read_handler(CharDriverState *chr)
1072 {
1073 PtyCharDriver *s = chr->opaque;
1074 GPollFD pfd;
1075
1076 pfd.fd = g_io_channel_unix_get_fd(s->fd);
1077 pfd.events = G_IO_OUT;
1078 pfd.revents = 0;
1079 g_poll(&pfd, 1, 0);
1080 if (pfd.revents & G_IO_HUP) {
1081 pty_chr_state(chr, 0);
1082 } else {
1083 pty_chr_state(chr, 1);
1084 }
1085 }
1086
1087 static void pty_chr_state(CharDriverState *chr, int connected)
1088 {
1089 PtyCharDriver *s = chr->opaque;
1090
1091 if (!connected) {
1092 if (s->fd_tag) {
1093 io_remove_watch_poll(s->fd_tag);
1094 s->fd_tag = 0;
1095 }
1096 s->connected = 0;
1097 /* (re-)connect poll interval for idle guests: once per second.
1098 * We check more frequently in case the guests sends data to
1099 * the virtual device linked to our pty. */
1100 pty_chr_rearm_timer(chr, 1000);
1101 } else {
1102 if (s->timer_tag) {
1103 g_source_remove(s->timer_tag);
1104 s->timer_tag = 0;
1105 }
1106 if (!s->connected) {
1107 qemu_chr_be_generic_open(chr);
1108 s->connected = 1;
1109 s->fd_tag = io_add_watch_poll(s->fd, pty_chr_read_poll, pty_chr_read, chr);
1110 }
1111 }
1112 }
1113
1114
1115 static void pty_chr_close(struct CharDriverState *chr)
1116 {
1117 PtyCharDriver *s = chr->opaque;
1118 int fd;
1119
1120 if (s->fd_tag) {
1121 io_remove_watch_poll(s->fd_tag);
1122 s->fd_tag = 0;
1123 }
1124 fd = g_io_channel_unix_get_fd(s->fd);
1125 g_io_channel_unref(s->fd);
1126 close(fd);
1127 if (s->timer_tag) {
1128 g_source_remove(s->timer_tag);
1129 s->timer_tag = 0;
1130 }
1131 g_free(s);
1132 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1133 }
1134
1135 static CharDriverState *qemu_chr_open_pty(const char *id,
1136 ChardevReturn *ret)
1137 {
1138 CharDriverState *chr;
1139 PtyCharDriver *s;
1140 int master_fd, slave_fd;
1141 char pty_name[PATH_MAX];
1142
1143 master_fd = qemu_openpty_raw(&slave_fd, pty_name);
1144 if (master_fd < 0) {
1145 return NULL;
1146 }
1147
1148 close(slave_fd);
1149
1150 chr = g_malloc0(sizeof(CharDriverState));
1151
1152 chr->filename = g_strdup_printf("pty:%s", pty_name);
1153 ret->pty = g_strdup(pty_name);
1154 ret->has_pty = true;
1155
1156 fprintf(stderr, "char device redirected to %s (label %s)\n",
1157 pty_name, id);
1158
1159 s = g_malloc0(sizeof(PtyCharDriver));
1160 chr->opaque = s;
1161 chr->chr_write = pty_chr_write;
1162 chr->chr_update_read_handler = pty_chr_update_read_handler;
1163 chr->chr_close = pty_chr_close;
1164 chr->chr_add_watch = pty_chr_add_watch;
1165 chr->explicit_be_open = true;
1166
1167 s->fd = io_channel_from_fd(master_fd);
1168 s->timer_tag = 0;
1169
1170 return chr;
1171 }
1172
1173 static void tty_serial_init(int fd, int speed,
1174 int parity, int data_bits, int stop_bits)
1175 {
1176 struct termios tty;
1177 speed_t spd;
1178
1179 #if 0
1180 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1181 speed, parity, data_bits, stop_bits);
1182 #endif
1183 tcgetattr (fd, &tty);
1184
1185 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1186 speed = speed * 10 / 11;
1187 do {
1188 check_speed(50);
1189 check_speed(75);
1190 check_speed(110);
1191 check_speed(134);
1192 check_speed(150);
1193 check_speed(200);
1194 check_speed(300);
1195 check_speed(600);
1196 check_speed(1200);
1197 check_speed(1800);
1198 check_speed(2400);
1199 check_speed(4800);
1200 check_speed(9600);
1201 check_speed(19200);
1202 check_speed(38400);
1203 /* Non-Posix values follow. They may be unsupported on some systems. */
1204 check_speed(57600);
1205 check_speed(115200);
1206 #ifdef B230400
1207 check_speed(230400);
1208 #endif
1209 #ifdef B460800
1210 check_speed(460800);
1211 #endif
1212 #ifdef B500000
1213 check_speed(500000);
1214 #endif
1215 #ifdef B576000
1216 check_speed(576000);
1217 #endif
1218 #ifdef B921600
1219 check_speed(921600);
1220 #endif
1221 #ifdef B1000000
1222 check_speed(1000000);
1223 #endif
1224 #ifdef B1152000
1225 check_speed(1152000);
1226 #endif
1227 #ifdef B1500000
1228 check_speed(1500000);
1229 #endif
1230 #ifdef B2000000
1231 check_speed(2000000);
1232 #endif
1233 #ifdef B2500000
1234 check_speed(2500000);
1235 #endif
1236 #ifdef B3000000
1237 check_speed(3000000);
1238 #endif
1239 #ifdef B3500000
1240 check_speed(3500000);
1241 #endif
1242 #ifdef B4000000
1243 check_speed(4000000);
1244 #endif
1245 spd = B115200;
1246 } while (0);
1247
1248 cfsetispeed(&tty, spd);
1249 cfsetospeed(&tty, spd);
1250
1251 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1252 |INLCR|IGNCR|ICRNL|IXON);
1253 tty.c_oflag |= OPOST;
1254 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1255 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1256 switch(data_bits) {
1257 default:
1258 case 8:
1259 tty.c_cflag |= CS8;
1260 break;
1261 case 7:
1262 tty.c_cflag |= CS7;
1263 break;
1264 case 6:
1265 tty.c_cflag |= CS6;
1266 break;
1267 case 5:
1268 tty.c_cflag |= CS5;
1269 break;
1270 }
1271 switch(parity) {
1272 default:
1273 case 'N':
1274 break;
1275 case 'E':
1276 tty.c_cflag |= PARENB;
1277 break;
1278 case 'O':
1279 tty.c_cflag |= PARENB | PARODD;
1280 break;
1281 }
1282 if (stop_bits == 2)
1283 tty.c_cflag |= CSTOPB;
1284
1285 tcsetattr (fd, TCSANOW, &tty);
1286 }
1287
1288 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1289 {
1290 FDCharDriver *s = chr->opaque;
1291
1292 switch(cmd) {
1293 case CHR_IOCTL_SERIAL_SET_PARAMS:
1294 {
1295 QEMUSerialSetParams *ssp = arg;
1296 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1297 ssp->speed, ssp->parity,
1298 ssp->data_bits, ssp->stop_bits);
1299 }
1300 break;
1301 case CHR_IOCTL_SERIAL_SET_BREAK:
1302 {
1303 int enable = *(int *)arg;
1304 if (enable) {
1305 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1306 }
1307 }
1308 break;
1309 case CHR_IOCTL_SERIAL_GET_TIOCM:
1310 {
1311 int sarg = 0;
1312 int *targ = (int *)arg;
1313 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1314 *targ = 0;
1315 if (sarg & TIOCM_CTS)
1316 *targ |= CHR_TIOCM_CTS;
1317 if (sarg & TIOCM_CAR)
1318 *targ |= CHR_TIOCM_CAR;
1319 if (sarg & TIOCM_DSR)
1320 *targ |= CHR_TIOCM_DSR;
1321 if (sarg & TIOCM_RI)
1322 *targ |= CHR_TIOCM_RI;
1323 if (sarg & TIOCM_DTR)
1324 *targ |= CHR_TIOCM_DTR;
1325 if (sarg & TIOCM_RTS)
1326 *targ |= CHR_TIOCM_RTS;
1327 }
1328 break;
1329 case CHR_IOCTL_SERIAL_SET_TIOCM:
1330 {
1331 int sarg = *(int *)arg;
1332 int targ = 0;
1333 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1334 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1335 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1336 if (sarg & CHR_TIOCM_CTS)
1337 targ |= TIOCM_CTS;
1338 if (sarg & CHR_TIOCM_CAR)
1339 targ |= TIOCM_CAR;
1340 if (sarg & CHR_TIOCM_DSR)
1341 targ |= TIOCM_DSR;
1342 if (sarg & CHR_TIOCM_RI)
1343 targ |= TIOCM_RI;
1344 if (sarg & CHR_TIOCM_DTR)
1345 targ |= TIOCM_DTR;
1346 if (sarg & CHR_TIOCM_RTS)
1347 targ |= TIOCM_RTS;
1348 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1349 }
1350 break;
1351 default:
1352 return -ENOTSUP;
1353 }
1354 return 0;
1355 }
1356
1357 static void qemu_chr_close_tty(CharDriverState *chr)
1358 {
1359 FDCharDriver *s = chr->opaque;
1360 int fd = -1;
1361
1362 if (s) {
1363 fd = g_io_channel_unix_get_fd(s->fd_in);
1364 }
1365
1366 fd_chr_close(chr);
1367
1368 if (fd >= 0) {
1369 close(fd);
1370 }
1371 }
1372
1373 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1374 {
1375 CharDriverState *chr;
1376
1377 tty_serial_init(fd, 115200, 'N', 8, 1);
1378 chr = qemu_chr_open_fd(fd, fd);
1379 chr->chr_ioctl = tty_serial_ioctl;
1380 chr->chr_close = qemu_chr_close_tty;
1381 return chr;
1382 }
1383 #endif /* __linux__ || __sun__ */
1384
1385 #if defined(__linux__)
1386
1387 #define HAVE_CHARDEV_PARPORT 1
1388
1389 typedef struct {
1390 int fd;
1391 int mode;
1392 } ParallelCharDriver;
1393
1394 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1395 {
1396 if (s->mode != mode) {
1397 int m = mode;
1398 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1399 return 0;
1400 s->mode = mode;
1401 }
1402 return 1;
1403 }
1404
1405 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1406 {
1407 ParallelCharDriver *drv = chr->opaque;
1408 int fd = drv->fd;
1409 uint8_t b;
1410
1411 switch(cmd) {
1412 case CHR_IOCTL_PP_READ_DATA:
1413 if (ioctl(fd, PPRDATA, &b) < 0)
1414 return -ENOTSUP;
1415 *(uint8_t *)arg = b;
1416 break;
1417 case CHR_IOCTL_PP_WRITE_DATA:
1418 b = *(uint8_t *)arg;
1419 if (ioctl(fd, PPWDATA, &b) < 0)
1420 return -ENOTSUP;
1421 break;
1422 case CHR_IOCTL_PP_READ_CONTROL:
1423 if (ioctl(fd, PPRCONTROL, &b) < 0)
1424 return -ENOTSUP;
1425 /* Linux gives only the lowest bits, and no way to know data
1426 direction! For better compatibility set the fixed upper
1427 bits. */
1428 *(uint8_t *)arg = b | 0xc0;
1429 break;
1430 case CHR_IOCTL_PP_WRITE_CONTROL:
1431 b = *(uint8_t *)arg;
1432 if (ioctl(fd, PPWCONTROL, &b) < 0)
1433 return -ENOTSUP;
1434 break;
1435 case CHR_IOCTL_PP_READ_STATUS:
1436 if (ioctl(fd, PPRSTATUS, &b) < 0)
1437 return -ENOTSUP;
1438 *(uint8_t *)arg = b;
1439 break;
1440 case CHR_IOCTL_PP_DATA_DIR:
1441 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1442 return -ENOTSUP;
1443 break;
1444 case CHR_IOCTL_PP_EPP_READ_ADDR:
1445 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1446 struct ParallelIOArg *parg = arg;
1447 int n = read(fd, parg->buffer, parg->count);
1448 if (n != parg->count) {
1449 return -EIO;
1450 }
1451 }
1452 break;
1453 case CHR_IOCTL_PP_EPP_READ:
1454 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1455 struct ParallelIOArg *parg = arg;
1456 int n = read(fd, parg->buffer, parg->count);
1457 if (n != parg->count) {
1458 return -EIO;
1459 }
1460 }
1461 break;
1462 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1463 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1464 struct ParallelIOArg *parg = arg;
1465 int n = write(fd, parg->buffer, parg->count);
1466 if (n != parg->count) {
1467 return -EIO;
1468 }
1469 }
1470 break;
1471 case CHR_IOCTL_PP_EPP_WRITE:
1472 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1473 struct ParallelIOArg *parg = arg;
1474 int n = write(fd, parg->buffer, parg->count);
1475 if (n != parg->count) {
1476 return -EIO;
1477 }
1478 }
1479 break;
1480 default:
1481 return -ENOTSUP;
1482 }
1483 return 0;
1484 }
1485
1486 static void pp_close(CharDriverState *chr)
1487 {
1488 ParallelCharDriver *drv = chr->opaque;
1489 int fd = drv->fd;
1490
1491 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1492 ioctl(fd, PPRELEASE);
1493 close(fd);
1494 g_free(drv);
1495 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1496 }
1497
1498 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1499 {
1500 CharDriverState *chr;
1501 ParallelCharDriver *drv;
1502
1503 if (ioctl(fd, PPCLAIM) < 0) {
1504 close(fd);
1505 return NULL;
1506 }
1507
1508 drv = g_malloc0(sizeof(ParallelCharDriver));
1509 drv->fd = fd;
1510 drv->mode = IEEE1284_MODE_COMPAT;
1511
1512 chr = g_malloc0(sizeof(CharDriverState));
1513 chr->chr_write = null_chr_write;
1514 chr->chr_ioctl = pp_ioctl;
1515 chr->chr_close = pp_close;
1516 chr->opaque = drv;
1517
1518 return chr;
1519 }
1520 #endif /* __linux__ */
1521
1522 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1523
1524 #define HAVE_CHARDEV_PARPORT 1
1525
1526 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1527 {
1528 int fd = (int)(intptr_t)chr->opaque;
1529 uint8_t b;
1530
1531 switch(cmd) {
1532 case CHR_IOCTL_PP_READ_DATA:
1533 if (ioctl(fd, PPIGDATA, &b) < 0)
1534 return -ENOTSUP;
1535 *(uint8_t *)arg = b;
1536 break;
1537 case CHR_IOCTL_PP_WRITE_DATA:
1538 b = *(uint8_t *)arg;
1539 if (ioctl(fd, PPISDATA, &b) < 0)
1540 return -ENOTSUP;
1541 break;
1542 case CHR_IOCTL_PP_READ_CONTROL:
1543 if (ioctl(fd, PPIGCTRL, &b) < 0)
1544 return -ENOTSUP;
1545 *(uint8_t *)arg = b;
1546 break;
1547 case CHR_IOCTL_PP_WRITE_CONTROL:
1548 b = *(uint8_t *)arg;
1549 if (ioctl(fd, PPISCTRL, &b) < 0)
1550 return -ENOTSUP;
1551 break;
1552 case CHR_IOCTL_PP_READ_STATUS:
1553 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1554 return -ENOTSUP;
1555 *(uint8_t *)arg = b;
1556 break;
1557 default:
1558 return -ENOTSUP;
1559 }
1560 return 0;
1561 }
1562
1563 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1564 {
1565 CharDriverState *chr;
1566
1567 chr = g_malloc0(sizeof(CharDriverState));
1568 chr->opaque = (void *)(intptr_t)fd;
1569 chr->chr_write = null_chr_write;
1570 chr->chr_ioctl = pp_ioctl;
1571 chr->explicit_be_open = true;
1572 return chr;
1573 }
1574 #endif
1575
1576 #else /* _WIN32 */
1577
1578 typedef struct {
1579 int max_size;
1580 HANDLE hcom, hrecv, hsend;
1581 OVERLAPPED orecv, osend;
1582 BOOL fpipe;
1583 DWORD len;
1584 } WinCharState;
1585
1586 typedef struct {
1587 HANDLE hStdIn;
1588 HANDLE hInputReadyEvent;
1589 HANDLE hInputDoneEvent;
1590 HANDLE hInputThread;
1591 uint8_t win_stdio_buf;
1592 } WinStdioCharState;
1593
1594 #define NSENDBUF 2048
1595 #define NRECVBUF 2048
1596 #define MAXCONNECT 1
1597 #define NTIMEOUT 5000
1598
1599 static int win_chr_poll(void *opaque);
1600 static int win_chr_pipe_poll(void *opaque);
1601
1602 static void win_chr_close(CharDriverState *chr)
1603 {
1604 WinCharState *s = chr->opaque;
1605
1606 if (s->hsend) {
1607 CloseHandle(s->hsend);
1608 s->hsend = NULL;
1609 }
1610 if (s->hrecv) {
1611 CloseHandle(s->hrecv);
1612 s->hrecv = NULL;
1613 }
1614 if (s->hcom) {
1615 CloseHandle(s->hcom);
1616 s->hcom = NULL;
1617 }
1618 if (s->fpipe)
1619 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1620 else
1621 qemu_del_polling_cb(win_chr_poll, chr);
1622
1623 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1624 }
1625
1626 static int win_chr_init(CharDriverState *chr, const char *filename)
1627 {
1628 WinCharState *s = chr->opaque;
1629 COMMCONFIG comcfg;
1630 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1631 COMSTAT comstat;
1632 DWORD size;
1633 DWORD err;
1634
1635 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1636 if (!s->hsend) {
1637 fprintf(stderr, "Failed CreateEvent\n");
1638 goto fail;
1639 }
1640 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1641 if (!s->hrecv) {
1642 fprintf(stderr, "Failed CreateEvent\n");
1643 goto fail;
1644 }
1645
1646 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1647 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1648 if (s->hcom == INVALID_HANDLE_VALUE) {
1649 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1650 s->hcom = NULL;
1651 goto fail;
1652 }
1653
1654 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1655 fprintf(stderr, "Failed SetupComm\n");
1656 goto fail;
1657 }
1658
1659 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1660 size = sizeof(COMMCONFIG);
1661 GetDefaultCommConfig(filename, &comcfg, &size);
1662 comcfg.dcb.DCBlength = sizeof(DCB);
1663 CommConfigDialog(filename, NULL, &comcfg);
1664
1665 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1666 fprintf(stderr, "Failed SetCommState\n");
1667 goto fail;
1668 }
1669
1670 if (!SetCommMask(s->hcom, EV_ERR)) {
1671 fprintf(stderr, "Failed SetCommMask\n");
1672 goto fail;
1673 }
1674
1675 cto.ReadIntervalTimeout = MAXDWORD;
1676 if (!SetCommTimeouts(s->hcom, &cto)) {
1677 fprintf(stderr, "Failed SetCommTimeouts\n");
1678 goto fail;
1679 }
1680
1681 if (!ClearCommError(s->hcom, &err, &comstat)) {
1682 fprintf(stderr, "Failed ClearCommError\n");
1683 goto fail;
1684 }
1685 qemu_add_polling_cb(win_chr_poll, chr);
1686 return 0;
1687
1688 fail:
1689 win_chr_close(chr);
1690 return -1;
1691 }
1692
1693 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1694 {
1695 WinCharState *s = chr->opaque;
1696 DWORD len, ret, size, err;
1697
1698 len = len1;
1699 ZeroMemory(&s->osend, sizeof(s->osend));
1700 s->osend.hEvent = s->hsend;
1701 while (len > 0) {
1702 if (s->hsend)
1703 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1704 else
1705 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1706 if (!ret) {
1707 err = GetLastError();
1708 if (err == ERROR_IO_PENDING) {
1709 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1710 if (ret) {
1711 buf += size;
1712 len -= size;
1713 } else {
1714 break;
1715 }
1716 } else {
1717 break;
1718 }
1719 } else {
1720 buf += size;
1721 len -= size;
1722 }
1723 }
1724 return len1 - len;
1725 }
1726
1727 static int win_chr_read_poll(CharDriverState *chr)
1728 {
1729 WinCharState *s = chr->opaque;
1730
1731 s->max_size = qemu_chr_be_can_write(chr);
1732 return s->max_size;
1733 }
1734
1735 static void win_chr_readfile(CharDriverState *chr)
1736 {
1737 WinCharState *s = chr->opaque;
1738 int ret, err;
1739 uint8_t buf[READ_BUF_LEN];
1740 DWORD size;
1741
1742 ZeroMemory(&s->orecv, sizeof(s->orecv));
1743 s->orecv.hEvent = s->hrecv;
1744 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1745 if (!ret) {
1746 err = GetLastError();
1747 if (err == ERROR_IO_PENDING) {
1748 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1749 }
1750 }
1751
1752 if (size > 0) {
1753 qemu_chr_be_write(chr, buf, size);
1754 }
1755 }
1756
1757 static void win_chr_read(CharDriverState *chr)
1758 {
1759 WinCharState *s = chr->opaque;
1760
1761 if (s->len > s->max_size)
1762 s->len = s->max_size;
1763 if (s->len == 0)
1764 return;
1765
1766 win_chr_readfile(chr);
1767 }
1768
1769 static int win_chr_poll(void *opaque)
1770 {
1771 CharDriverState *chr = opaque;
1772 WinCharState *s = chr->opaque;
1773 COMSTAT status;
1774 DWORD comerr;
1775
1776 ClearCommError(s->hcom, &comerr, &status);
1777 if (status.cbInQue > 0) {
1778 s->len = status.cbInQue;
1779 win_chr_read_poll(chr);
1780 win_chr_read(chr);
1781 return 1;
1782 }
1783 return 0;
1784 }
1785
1786 static CharDriverState *qemu_chr_open_win_path(const char *filename)
1787 {
1788 CharDriverState *chr;
1789 WinCharState *s;
1790
1791 chr = g_malloc0(sizeof(CharDriverState));
1792 s = g_malloc0(sizeof(WinCharState));
1793 chr->opaque = s;
1794 chr->chr_write = win_chr_write;
1795 chr->chr_close = win_chr_close;
1796
1797 if (win_chr_init(chr, filename) < 0) {
1798 g_free(s);
1799 g_free(chr);
1800 return NULL;
1801 }
1802 return chr;
1803 }
1804
1805 static int win_chr_pipe_poll(void *opaque)
1806 {
1807 CharDriverState *chr = opaque;
1808 WinCharState *s = chr->opaque;
1809 DWORD size;
1810
1811 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1812 if (size > 0) {
1813 s->len = size;
1814 win_chr_read_poll(chr);
1815 win_chr_read(chr);
1816 return 1;
1817 }
1818 return 0;
1819 }
1820
1821 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1822 {
1823 WinCharState *s = chr->opaque;
1824 OVERLAPPED ov;
1825 int ret;
1826 DWORD size;
1827 char openname[256];
1828
1829 s->fpipe = TRUE;
1830
1831 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1832 if (!s->hsend) {
1833 fprintf(stderr, "Failed CreateEvent\n");
1834 goto fail;
1835 }
1836 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1837 if (!s->hrecv) {
1838 fprintf(stderr, "Failed CreateEvent\n");
1839 goto fail;
1840 }
1841
1842 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1843 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1844 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1845 PIPE_WAIT,
1846 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1847 if (s->hcom == INVALID_HANDLE_VALUE) {
1848 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1849 s->hcom = NULL;
1850 goto fail;
1851 }
1852
1853 ZeroMemory(&ov, sizeof(ov));
1854 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1855 ret = ConnectNamedPipe(s->hcom, &ov);
1856 if (ret) {
1857 fprintf(stderr, "Failed ConnectNamedPipe\n");
1858 goto fail;
1859 }
1860
1861 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1862 if (!ret) {
1863 fprintf(stderr, "Failed GetOverlappedResult\n");
1864 if (ov.hEvent) {
1865 CloseHandle(ov.hEvent);
1866 ov.hEvent = NULL;
1867 }
1868 goto fail;
1869 }
1870
1871 if (ov.hEvent) {
1872 CloseHandle(ov.hEvent);
1873 ov.hEvent = NULL;
1874 }
1875 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1876 return 0;
1877
1878 fail:
1879 win_chr_close(chr);
1880 return -1;
1881 }
1882
1883
1884 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
1885 {
1886 const char *filename = opts->device;
1887 CharDriverState *chr;
1888 WinCharState *s;
1889
1890 chr = g_malloc0(sizeof(CharDriverState));
1891 s = g_malloc0(sizeof(WinCharState));
1892 chr->opaque = s;
1893 chr->chr_write = win_chr_write;
1894 chr->chr_close = win_chr_close;
1895
1896 if (win_chr_pipe_init(chr, filename) < 0) {
1897 g_free(s);
1898 g_free(chr);
1899 return NULL;
1900 }
1901 return chr;
1902 }
1903
1904 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1905 {
1906 CharDriverState *chr;
1907 WinCharState *s;
1908
1909 chr = g_malloc0(sizeof(CharDriverState));
1910 s = g_malloc0(sizeof(WinCharState));
1911 s->hcom = fd_out;
1912 chr->opaque = s;
1913 chr->chr_write = win_chr_write;
1914 return chr;
1915 }
1916
1917 static CharDriverState *qemu_chr_open_win_con(void)
1918 {
1919 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1920 }
1921
1922 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1923 {
1924 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1925 DWORD dwSize;
1926 int len1;
1927
1928 len1 = len;
1929
1930 while (len1 > 0) {
1931 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1932 break;
1933 }
1934 buf += dwSize;
1935 len1 -= dwSize;
1936 }
1937
1938 return len - len1;
1939 }
1940
1941 static void win_stdio_wait_func(void *opaque)
1942 {
1943 CharDriverState *chr = opaque;
1944 WinStdioCharState *stdio = chr->opaque;
1945 INPUT_RECORD buf[4];
1946 int ret;
1947 DWORD dwSize;
1948 int i;
1949
1950 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
1951 &dwSize);
1952
1953 if (!ret) {
1954 /* Avoid error storm */
1955 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
1956 return;
1957 }
1958
1959 for (i = 0; i < dwSize; i++) {
1960 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
1961
1962 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
1963 int j;
1964 if (kev->uChar.AsciiChar != 0) {
1965 for (j = 0; j < kev->wRepeatCount; j++) {
1966 if (qemu_chr_be_can_write(chr)) {
1967 uint8_t c = kev->uChar.AsciiChar;
1968 qemu_chr_be_write(chr, &c, 1);
1969 }
1970 }
1971 }
1972 }
1973 }
1974 }
1975
1976 static DWORD WINAPI win_stdio_thread(LPVOID param)
1977 {
1978 CharDriverState *chr = param;
1979 WinStdioCharState *stdio = chr->opaque;
1980 int ret;
1981 DWORD dwSize;
1982
1983 while (1) {
1984
1985 /* Wait for one byte */
1986 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
1987
1988 /* Exit in case of error, continue if nothing read */
1989 if (!ret) {
1990 break;
1991 }
1992 if (!dwSize) {
1993 continue;
1994 }
1995
1996 /* Some terminal emulator returns \r\n for Enter, just pass \n */
1997 if (stdio->win_stdio_buf == '\r') {
1998 continue;
1999 }
2000
2001 /* Signal the main thread and wait until the byte was eaten */
2002 if (!SetEvent(stdio->hInputReadyEvent)) {
2003 break;
2004 }
2005 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2006 != WAIT_OBJECT_0) {
2007 break;
2008 }
2009 }
2010
2011 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2012 return 0;
2013 }
2014
2015 static void win_stdio_thread_wait_func(void *opaque)
2016 {
2017 CharDriverState *chr = opaque;
2018 WinStdioCharState *stdio = chr->opaque;
2019
2020 if (qemu_chr_be_can_write(chr)) {
2021 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2022 }
2023
2024 SetEvent(stdio->hInputDoneEvent);
2025 }
2026
2027 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2028 {
2029 WinStdioCharState *stdio = chr->opaque;
2030 DWORD dwMode = 0;
2031
2032 GetConsoleMode(stdio->hStdIn, &dwMode);
2033
2034 if (echo) {
2035 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2036 } else {
2037 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2038 }
2039 }
2040
2041 static void win_stdio_close(CharDriverState *chr)
2042 {
2043 WinStdioCharState *stdio = chr->opaque;
2044
2045 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2046 CloseHandle(stdio->hInputReadyEvent);
2047 }
2048 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2049 CloseHandle(stdio->hInputDoneEvent);
2050 }
2051 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2052 TerminateThread(stdio->hInputThread, 0);
2053 }
2054
2055 g_free(chr->opaque);
2056 g_free(chr);
2057 }
2058
2059 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
2060 {
2061 CharDriverState *chr;
2062 WinStdioCharState *stdio;
2063 DWORD dwMode;
2064 int is_console = 0;
2065
2066 chr = g_malloc0(sizeof(CharDriverState));
2067 stdio = g_malloc0(sizeof(WinStdioCharState));
2068
2069 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2070 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2071 fprintf(stderr, "cannot open stdio: invalid handle\n");
2072 exit(1);
2073 }
2074
2075 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2076
2077 chr->opaque = stdio;
2078 chr->chr_write = win_stdio_write;
2079 chr->chr_close = win_stdio_close;
2080
2081 if (is_console) {
2082 if (qemu_add_wait_object(stdio->hStdIn,
2083 win_stdio_wait_func, chr)) {
2084 fprintf(stderr, "qemu_add_wait_object: failed\n");
2085 }
2086 } else {
2087 DWORD dwId;
2088
2089 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2090 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2091 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2092 chr, 0, &dwId);
2093
2094 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2095 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2096 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2097 fprintf(stderr, "cannot create stdio thread or event\n");
2098 exit(1);
2099 }
2100 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2101 win_stdio_thread_wait_func, chr)) {
2102 fprintf(stderr, "qemu_add_wait_object: failed\n");
2103 }
2104 }
2105
2106 dwMode |= ENABLE_LINE_INPUT;
2107
2108 if (is_console) {
2109 /* set the terminal in raw mode */
2110 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2111 dwMode |= ENABLE_PROCESSED_INPUT;
2112 }
2113
2114 SetConsoleMode(stdio->hStdIn, dwMode);
2115
2116 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2117 qemu_chr_fe_set_echo(chr, false);
2118
2119 return chr;
2120 }
2121 #endif /* !_WIN32 */
2122
2123
2124 /***********************************************************/
2125 /* UDP Net console */
2126
2127 typedef struct {
2128 int fd;
2129 GIOChannel *chan;
2130 guint tag;
2131 uint8_t buf[READ_BUF_LEN];
2132 int bufcnt;
2133 int bufptr;
2134 int max_size;
2135 } NetCharDriver;
2136
2137 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2138 {
2139 NetCharDriver *s = chr->opaque;
2140 gsize bytes_written;
2141 GIOStatus status;
2142
2143 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2144 if (status == G_IO_STATUS_EOF) {
2145 return 0;
2146 } else if (status != G_IO_STATUS_NORMAL) {
2147 return -1;
2148 }
2149
2150 return bytes_written;
2151 }
2152
2153 static int udp_chr_read_poll(void *opaque)
2154 {
2155 CharDriverState *chr = opaque;
2156 NetCharDriver *s = chr->opaque;
2157
2158 s->max_size = qemu_chr_be_can_write(chr);
2159
2160 /* If there were any stray characters in the queue process them
2161 * first
2162 */
2163 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2164 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2165 s->bufptr++;
2166 s->max_size = qemu_chr_be_can_write(chr);
2167 }
2168 return s->max_size;
2169 }
2170
2171 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2172 {
2173 CharDriverState *chr = opaque;
2174 NetCharDriver *s = chr->opaque;
2175 gsize bytes_read = 0;
2176 GIOStatus status;
2177
2178 if (s->max_size == 0) {
2179 return TRUE;
2180 }
2181 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2182 &bytes_read, NULL);
2183 s->bufcnt = bytes_read;
2184 s->bufptr = s->bufcnt;
2185 if (status != G_IO_STATUS_NORMAL) {
2186 if (s->tag) {
2187 io_remove_watch_poll(s->tag);
2188 s->tag = 0;
2189 }
2190 return FALSE;
2191 }
2192
2193 s->bufptr = 0;
2194 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2195 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2196 s->bufptr++;
2197 s->max_size = qemu_chr_be_can_write(chr);
2198 }
2199
2200 return TRUE;
2201 }
2202
2203 static void udp_chr_update_read_handler(CharDriverState *chr)
2204 {
2205 NetCharDriver *s = chr->opaque;
2206
2207 if (s->tag) {
2208 io_remove_watch_poll(s->tag);
2209 s->tag = 0;
2210 }
2211
2212 if (s->chan) {
2213 s->tag = io_add_watch_poll(s->chan, udp_chr_read_poll, udp_chr_read, chr);
2214 }
2215 }
2216
2217 static void udp_chr_close(CharDriverState *chr)
2218 {
2219 NetCharDriver *s = chr->opaque;
2220 if (s->tag) {
2221 io_remove_watch_poll(s->tag);
2222 s->tag = 0;
2223 }
2224 if (s->chan) {
2225 g_io_channel_unref(s->chan);
2226 closesocket(s->fd);
2227 }
2228 g_free(s);
2229 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2230 }
2231
2232 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2233 {
2234 CharDriverState *chr = NULL;
2235 NetCharDriver *s = NULL;
2236
2237 chr = g_malloc0(sizeof(CharDriverState));
2238 s = g_malloc0(sizeof(NetCharDriver));
2239
2240 s->fd = fd;
2241 s->chan = io_channel_from_socket(s->fd);
2242 s->bufcnt = 0;
2243 s->bufptr = 0;
2244 chr->opaque = s;
2245 chr->chr_write = udp_chr_write;
2246 chr->chr_update_read_handler = udp_chr_update_read_handler;
2247 chr->chr_close = udp_chr_close;
2248 /* be isn't opened until we get a connection */
2249 chr->explicit_be_open = true;
2250 return chr;
2251 }
2252
2253 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2254 {
2255 Error *local_err = NULL;
2256 int fd = -1;
2257
2258 fd = inet_dgram_opts(opts, &local_err);
2259 if (fd < 0) {
2260 return NULL;
2261 }
2262 return qemu_chr_open_udp_fd(fd);
2263 }
2264
2265 /***********************************************************/
2266 /* TCP Net console */
2267
2268 typedef struct {
2269
2270 GIOChannel *chan, *listen_chan;
2271 guint tag, listen_tag;
2272 int fd, listen_fd;
2273 int connected;
2274 int max_size;
2275 int do_telnetopt;
2276 int do_nodelay;
2277 int is_unix;
2278 int msgfd;
2279 } TCPCharDriver;
2280
2281 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2282
2283 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2284 {
2285 TCPCharDriver *s = chr->opaque;
2286 if (s->connected) {
2287 return io_channel_send(s->chan, buf, len);
2288 } else {
2289 /* XXX: indicate an error ? */
2290 return len;
2291 }
2292 }
2293
2294 static int tcp_chr_read_poll(void *opaque)
2295 {
2296 CharDriverState *chr = opaque;
2297 TCPCharDriver *s = chr->opaque;
2298 if (!s->connected)
2299 return 0;
2300 s->max_size = qemu_chr_be_can_write(chr);
2301 return s->max_size;
2302 }
2303
2304 #define IAC 255
2305 #define IAC_BREAK 243
2306 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2307 TCPCharDriver *s,
2308 uint8_t *buf, int *size)
2309 {
2310 /* Handle any telnet client's basic IAC options to satisfy char by
2311 * char mode with no echo. All IAC options will be removed from
2312 * the buf and the do_telnetopt variable will be used to track the
2313 * state of the width of the IAC information.
2314 *
2315 * IAC commands come in sets of 3 bytes with the exception of the
2316 * "IAC BREAK" command and the double IAC.
2317 */
2318
2319 int i;
2320 int j = 0;
2321
2322 for (i = 0; i < *size; i++) {
2323 if (s->do_telnetopt > 1) {
2324 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2325 /* Double IAC means send an IAC */
2326 if (j != i)
2327 buf[j] = buf[i];
2328 j++;
2329 s->do_telnetopt = 1;
2330 } else {
2331 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2332 /* Handle IAC break commands by sending a serial break */
2333 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2334 s->do_telnetopt++;
2335 }
2336 s->do_telnetopt++;
2337 }
2338 if (s->do_telnetopt >= 4) {
2339 s->do_telnetopt = 1;
2340 }
2341 } else {
2342 if ((unsigned char)buf[i] == IAC) {
2343 s->do_telnetopt = 2;
2344 } else {
2345 if (j != i)
2346 buf[j] = buf[i];
2347 j++;
2348 }
2349 }
2350 }
2351 *size = j;
2352 }
2353
2354 static int tcp_get_msgfd(CharDriverState *chr)
2355 {
2356 TCPCharDriver *s = chr->opaque;
2357 int fd = s->msgfd;
2358 s->msgfd = -1;
2359 return fd;
2360 }
2361
2362 #ifndef _WIN32
2363 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2364 {
2365 TCPCharDriver *s = chr->opaque;
2366 struct cmsghdr *cmsg;
2367
2368 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2369 int fd;
2370
2371 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2372 cmsg->cmsg_level != SOL_SOCKET ||
2373 cmsg->cmsg_type != SCM_RIGHTS)
2374 continue;
2375
2376 fd = *((int *)CMSG_DATA(cmsg));
2377 if (fd < 0)
2378 continue;
2379
2380 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2381 qemu_set_block(fd);
2382
2383 #ifndef MSG_CMSG_CLOEXEC
2384 qemu_set_cloexec(fd);
2385 #endif
2386 if (s->msgfd != -1)
2387 close(s->msgfd);
2388 s->msgfd = fd;
2389 }
2390 }
2391
2392 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2393 {
2394 TCPCharDriver *s = chr->opaque;
2395 struct msghdr msg = { NULL, };
2396 struct iovec iov[1];
2397 union {
2398 struct cmsghdr cmsg;
2399 char control[CMSG_SPACE(sizeof(int))];
2400 } msg_control;
2401 int flags = 0;
2402 ssize_t ret;
2403
2404 iov[0].iov_base = buf;
2405 iov[0].iov_len = len;
2406
2407 msg.msg_iov = iov;
2408 msg.msg_iovlen = 1;
2409 msg.msg_control = &msg_control;
2410 msg.msg_controllen = sizeof(msg_control);
2411
2412 #ifdef MSG_CMSG_CLOEXEC
2413 flags |= MSG_CMSG_CLOEXEC;
2414 #endif
2415 ret = recvmsg(s->fd, &msg, flags);
2416 if (ret > 0 && s->is_unix) {
2417 unix_process_msgfd(chr, &msg);
2418 }
2419
2420 return ret;
2421 }
2422 #else
2423 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2424 {
2425 TCPCharDriver *s = chr->opaque;
2426 return qemu_recv(s->fd, buf, len, 0);
2427 }
2428 #endif
2429
2430 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2431 {
2432 TCPCharDriver *s = chr->opaque;
2433 return g_io_create_watch(s->chan, cond);
2434 }
2435
2436 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2437 {
2438 CharDriverState *chr = opaque;
2439 TCPCharDriver *s = chr->opaque;
2440 uint8_t buf[READ_BUF_LEN];
2441 int len, size;
2442
2443 if (!s->connected || s->max_size <= 0) {
2444 return TRUE;
2445 }
2446 len = sizeof(buf);
2447 if (len > s->max_size)
2448 len = s->max_size;
2449 size = tcp_chr_recv(chr, (void *)buf, len);
2450 if (size == 0) {
2451 /* connection closed */
2452 s->connected = 0;
2453 if (s->listen_chan) {
2454 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2455 }
2456 if (s->tag) {
2457 io_remove_watch_poll(s->tag);
2458 s->tag = 0;
2459 }
2460 g_io_channel_unref(s->chan);
2461 s->chan = NULL;
2462 closesocket(s->fd);
2463 s->fd = -1;
2464 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2465 } else if (size > 0) {
2466 if (s->do_telnetopt)
2467 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2468 if (size > 0)
2469 qemu_chr_be_write(chr, buf, size);
2470 }
2471
2472 return TRUE;
2473 }
2474
2475 #ifndef _WIN32
2476 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2477 {
2478 return qemu_chr_open_fd(eventfd, eventfd);
2479 }
2480 #endif
2481
2482 static void tcp_chr_connect(void *opaque)
2483 {
2484 CharDriverState *chr = opaque;
2485 TCPCharDriver *s = chr->opaque;
2486
2487 s->connected = 1;
2488 if (s->chan) {
2489 s->tag = io_add_watch_poll(s->chan, tcp_chr_read_poll, tcp_chr_read, chr);
2490 }
2491 qemu_chr_be_generic_open(chr);
2492 }
2493
2494 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2495 static void tcp_chr_telnet_init(int fd)
2496 {
2497 char buf[3];
2498 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2499 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2500 send(fd, (char *)buf, 3, 0);
2501 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2502 send(fd, (char *)buf, 3, 0);
2503 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2504 send(fd, (char *)buf, 3, 0);
2505 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2506 send(fd, (char *)buf, 3, 0);
2507 }
2508
2509 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2510 {
2511 TCPCharDriver *s = chr->opaque;
2512 if (s->fd != -1)
2513 return -1;
2514
2515 qemu_set_nonblock(fd);
2516 if (s->do_nodelay)
2517 socket_set_nodelay(fd);
2518 s->fd = fd;
2519 s->chan = io_channel_from_socket(fd);
2520 if (s->listen_tag) {
2521 g_source_remove(s->listen_tag);
2522 s->listen_tag = 0;
2523 }
2524 tcp_chr_connect(chr);
2525
2526 return 0;
2527 }
2528
2529 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
2530 {
2531 CharDriverState *chr = opaque;
2532 TCPCharDriver *s = chr->opaque;
2533 struct sockaddr_in saddr;
2534 #ifndef _WIN32
2535 struct sockaddr_un uaddr;
2536 #endif
2537 struct sockaddr *addr;
2538 socklen_t len;
2539 int fd;
2540
2541 for(;;) {
2542 #ifndef _WIN32
2543 if (s->is_unix) {
2544 len = sizeof(uaddr);
2545 addr = (struct sockaddr *)&uaddr;
2546 } else
2547 #endif
2548 {
2549 len = sizeof(saddr);
2550 addr = (struct sockaddr *)&saddr;
2551 }
2552 fd = qemu_accept(s->listen_fd, addr, &len);
2553 if (fd < 0 && errno != EINTR) {
2554 s->listen_tag = 0;
2555 return FALSE;
2556 } else if (fd >= 0) {
2557 if (s->do_telnetopt)
2558 tcp_chr_telnet_init(fd);
2559 break;
2560 }
2561 }
2562 if (tcp_chr_add_client(chr, fd) < 0)
2563 close(fd);
2564
2565 return TRUE;
2566 }
2567
2568 static void tcp_chr_close(CharDriverState *chr)
2569 {
2570 TCPCharDriver *s = chr->opaque;
2571 if (s->fd >= 0) {
2572 if (s->tag) {
2573 io_remove_watch_poll(s->tag);
2574 s->tag = 0;
2575 }
2576 if (s->chan) {
2577 g_io_channel_unref(s->chan);
2578 }
2579 closesocket(s->fd);
2580 }
2581 if (s->listen_fd >= 0) {
2582 if (s->listen_tag) {
2583 g_source_remove(s->listen_tag);
2584 s->listen_tag = 0;
2585 }
2586 if (s->listen_chan) {
2587 g_io_channel_unref(s->listen_chan);
2588 }
2589 closesocket(s->listen_fd);
2590 }
2591 g_free(s);
2592 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2593 }
2594
2595 static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
2596 bool is_listen, bool is_telnet,
2597 bool is_waitconnect,
2598 Error **errp)
2599 {
2600 CharDriverState *chr = NULL;
2601 TCPCharDriver *s = NULL;
2602 char host[NI_MAXHOST], serv[NI_MAXSERV];
2603 const char *left = "", *right = "";
2604 struct sockaddr_storage ss;
2605 socklen_t ss_len = sizeof(ss);
2606
2607 memset(&ss, 0, ss_len);
2608 if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2609 error_setg(errp, "getsockname: %s", strerror(errno));
2610 return NULL;
2611 }
2612
2613 chr = g_malloc0(sizeof(CharDriverState));
2614 s = g_malloc0(sizeof(TCPCharDriver));
2615
2616 s->connected = 0;
2617 s->fd = -1;
2618 s->listen_fd = -1;
2619 s->msgfd = -1;
2620
2621 chr->filename = g_malloc(256);
2622 switch (ss.ss_family) {
2623 #ifndef _WIN32
2624 case AF_UNIX:
2625 s->is_unix = 1;
2626 snprintf(chr->filename, 256, "unix:%s%s",
2627 ((struct sockaddr_un *)(&ss))->sun_path,
2628 is_listen ? ",server" : "");
2629 break;
2630 #endif
2631 case AF_INET6:
2632 left = "[";
2633 right = "]";
2634 /* fall through */
2635 case AF_INET:
2636 s->do_nodelay = do_nodelay;
2637 getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
2638 serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
2639 snprintf(chr->filename, 256, "%s:%s%s%s:%s%s",
2640 is_telnet ? "telnet" : "tcp",
2641 left, host, right, serv,
2642 is_listen ? ",server" : "");
2643 break;
2644 }
2645
2646 chr->opaque = s;
2647 chr->chr_write = tcp_chr_write;
2648 chr->chr_close = tcp_chr_close;
2649 chr->get_msgfd = tcp_get_msgfd;
2650 chr->chr_add_client = tcp_chr_add_client;
2651 chr->chr_add_watch = tcp_chr_add_watch;
2652 /* be isn't opened until we get a connection */
2653 chr->explicit_be_open = true;
2654
2655 if (is_listen) {
2656 s->listen_fd = fd;
2657 s->listen_chan = io_channel_from_socket(s->listen_fd);
2658 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2659 if (is_telnet) {
2660 s->do_telnetopt = 1;
2661 }
2662 } else {
2663 s->connected = 1;
2664 s->fd = fd;
2665 socket_set_nodelay(fd);
2666 s->chan = io_channel_from_socket(s->fd);
2667 tcp_chr_connect(chr);
2668 }
2669
2670 if (is_listen && is_waitconnect) {
2671 printf("QEMU waiting for connection on: %s\n",
2672 chr->filename);
2673 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
2674 qemu_set_nonblock(s->listen_fd);
2675 }
2676 return chr;
2677 }
2678
2679 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2680 {
2681 CharDriverState *chr = NULL;
2682 Error *local_err = NULL;
2683 int fd = -1;
2684 int is_listen;
2685 int is_waitconnect;
2686 int do_nodelay;
2687 int is_unix;
2688 int is_telnet;
2689
2690 is_listen = qemu_opt_get_bool(opts, "server", 0);
2691 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2692 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2693 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2694 is_unix = qemu_opt_get(opts, "path") != NULL;
2695 if (!is_listen)
2696 is_waitconnect = 0;
2697
2698 if (is_unix) {
2699 if (is_listen) {
2700 fd = unix_listen_opts(opts, &local_err);
2701 } else {
2702 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
2703 }
2704 } else {
2705 if (is_listen) {
2706 fd = inet_listen_opts(opts, 0, &local_err);
2707 } else {
2708 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
2709 }
2710 }
2711 if (fd < 0) {
2712 goto fail;
2713 }
2714
2715 if (!is_waitconnect)
2716 qemu_set_nonblock(fd);
2717
2718 chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet,
2719 is_waitconnect, &local_err);
2720 if (error_is_set(&local_err)) {
2721 goto fail;
2722 }
2723 return chr;
2724
2725
2726 fail:
2727 if (local_err) {
2728 qerror_report_err(local_err);
2729 error_free(local_err);
2730 }
2731 if (fd >= 0) {
2732 closesocket(fd);
2733 }
2734 if (chr) {
2735 g_free(chr->opaque);
2736 g_free(chr);
2737 }
2738 return NULL;
2739 }
2740
2741 /*********************************************************/
2742 /* Ring buffer chardev */
2743
2744 typedef struct {
2745 size_t size;
2746 size_t prod;
2747 size_t cons;
2748 uint8_t *cbuf;
2749 } RingBufCharDriver;
2750
2751 static size_t ringbuf_count(const CharDriverState *chr)
2752 {
2753 const RingBufCharDriver *d = chr->opaque;
2754
2755 return d->prod - d->cons;
2756 }
2757
2758 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2759 {
2760 RingBufCharDriver *d = chr->opaque;
2761 int i;
2762
2763 if (!buf || (len < 0)) {
2764 return -1;
2765 }
2766
2767 for (i = 0; i < len; i++ ) {
2768 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
2769 if (d->prod - d->cons > d->size) {
2770 d->cons = d->prod - d->size;
2771 }
2772 }
2773
2774 return 0;
2775 }
2776
2777 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
2778 {
2779 RingBufCharDriver *d = chr->opaque;
2780 int i;
2781
2782 for (i = 0; i < len && d->cons != d->prod; i++) {
2783 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
2784 }
2785
2786 return i;
2787 }
2788
2789 static void ringbuf_chr_close(struct CharDriverState *chr)
2790 {
2791 RingBufCharDriver *d = chr->opaque;
2792
2793 g_free(d->cbuf);
2794 g_free(d);
2795 chr->opaque = NULL;
2796 }
2797
2798 static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts,
2799 Error **errp)
2800 {
2801 CharDriverState *chr;
2802 RingBufCharDriver *d;
2803
2804 chr = g_malloc0(sizeof(CharDriverState));
2805 d = g_malloc(sizeof(*d));
2806
2807 d->size = opts->has_size ? opts->size : 65536;
2808
2809 /* The size must be power of 2 */
2810 if (d->size & (d->size - 1)) {
2811 error_setg(errp, "size of ringbuf chardev must be power of two");
2812 goto fail;
2813 }
2814
2815 d->prod = 0;
2816 d->cons = 0;
2817 d->cbuf = g_malloc0(d->size);
2818
2819 chr->opaque = d;
2820 chr->chr_write = ringbuf_chr_write;
2821 chr->chr_close = ringbuf_chr_close;
2822
2823 return chr;
2824
2825 fail:
2826 g_free(d);
2827 g_free(chr);
2828 return NULL;
2829 }
2830
2831 static bool chr_is_ringbuf(const CharDriverState *chr)
2832 {
2833 return chr->chr_write == ringbuf_chr_write;
2834 }
2835
2836 void qmp_ringbuf_write(const char *device, const char *data,
2837 bool has_format, enum DataFormat format,
2838 Error **errp)
2839 {
2840 CharDriverState *chr;
2841 const uint8_t *write_data;
2842 int ret;
2843 size_t write_count;
2844
2845 chr = qemu_chr_find(device);
2846 if (!chr) {
2847 error_setg(errp, "Device '%s' not found", device);
2848 return;
2849 }
2850
2851 if (!chr_is_ringbuf(chr)) {
2852 error_setg(errp,"%s is not a ringbuf device", device);
2853 return;
2854 }
2855
2856 if (has_format && (format == DATA_FORMAT_BASE64)) {
2857 write_data = g_base64_decode(data, &write_count);
2858 } else {
2859 write_data = (uint8_t *)data;
2860 write_count = strlen(data);
2861 }
2862
2863 ret = ringbuf_chr_write(chr, write_data, write_count);
2864
2865 if (write_data != (uint8_t *)data) {
2866 g_free((void *)write_data);
2867 }
2868
2869 if (ret < 0) {
2870 error_setg(errp, "Failed to write to device %s", device);
2871 return;
2872 }
2873 }
2874
2875 char *qmp_ringbuf_read(const char *device, int64_t size,
2876 bool has_format, enum DataFormat format,
2877 Error **errp)
2878 {
2879 CharDriverState *chr;
2880 uint8_t *read_data;
2881 size_t count;
2882 char *data;
2883
2884 chr = qemu_chr_find(device);
2885 if (!chr) {
2886 error_setg(errp, "Device '%s' not found", device);
2887 return NULL;
2888 }
2889
2890 if (!chr_is_ringbuf(chr)) {
2891 error_setg(errp,"%s is not a ringbuf device", device);
2892 return NULL;
2893 }
2894
2895 if (size <= 0) {
2896 error_setg(errp, "size must be greater than zero");
2897 return NULL;
2898 }
2899
2900 count = ringbuf_count(chr);
2901 size = size > count ? count : size;
2902 read_data = g_malloc(size + 1);
2903
2904 ringbuf_chr_read(chr, read_data, size);
2905
2906 if (has_format && (format == DATA_FORMAT_BASE64)) {
2907 data = g_base64_encode(read_data, size);
2908 g_free(read_data);
2909 } else {
2910 /*
2911 * FIXME should read only complete, valid UTF-8 characters up
2912 * to @size bytes. Invalid sequences should be replaced by a
2913 * suitable replacement character. Except when (and only
2914 * when) ring buffer lost characters since last read, initial
2915 * continuation characters should be dropped.
2916 */
2917 read_data[size] = 0;
2918 data = (char *)read_data;
2919 }
2920
2921 return data;
2922 }
2923
2924 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2925 {
2926 char host[65], port[33], width[8], height[8];
2927 int pos;
2928 const char *p;
2929 QemuOpts *opts;
2930 Error *local_err = NULL;
2931
2932 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
2933 if (error_is_set(&local_err)) {
2934 qerror_report_err(local_err);
2935 error_free(local_err);
2936 return NULL;
2937 }
2938
2939 if (strstart(filename, "mon:", &p)) {
2940 filename = p;
2941 qemu_opt_set(opts, "mux", "on");
2942 }
2943
2944 if (strcmp(filename, "null") == 0 ||
2945 strcmp(filename, "pty") == 0 ||
2946 strcmp(filename, "msmouse") == 0 ||
2947 strcmp(filename, "braille") == 0 ||
2948 strcmp(filename, "stdio") == 0) {
2949 qemu_opt_set(opts, "backend", filename);
2950 return opts;
2951 }
2952 if (strstart(filename, "vc", &p)) {
2953 qemu_opt_set(opts, "backend", "vc");
2954 if (*p == ':') {
2955 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2956 /* pixels */
2957 qemu_opt_set(opts, "width", width);
2958 qemu_opt_set(opts, "height", height);
2959 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2960 /* chars */
2961 qemu_opt_set(opts, "cols", width);
2962 qemu_opt_set(opts, "rows", height);
2963 } else {
2964 goto fail;
2965 }
2966 }
2967 return opts;
2968 }
2969 if (strcmp(filename, "con:") == 0) {
2970 qemu_opt_set(opts, "backend", "console");
2971 return opts;
2972 }
2973 if (strstart(filename, "COM", NULL)) {
2974 qemu_opt_set(opts, "backend", "serial");
2975 qemu_opt_set(opts, "path", filename);
2976 return opts;
2977 }
2978 if (strstart(filename, "file:", &p)) {
2979 qemu_opt_set(opts, "backend", "file");
2980 qemu_opt_set(opts, "path", p);
2981 return opts;
2982 }
2983 if (strstart(filename, "pipe:", &p)) {
2984 qemu_opt_set(opts, "backend", "pipe");
2985 qemu_opt_set(opts, "path", p);
2986 return opts;
2987 }
2988 if (strstart(filename, "tcp:", &p) ||
2989 strstart(filename, "telnet:", &p)) {
2990 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2991 host[0] = 0;
2992 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2993 goto fail;
2994 }
2995 qemu_opt_set(opts, "backend", "socket");
2996 qemu_opt_set(opts, "host", host);
2997 qemu_opt_set(opts, "port", port);
2998 if (p[pos] == ',') {
2999 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
3000 goto fail;
3001 }
3002 if (strstart(filename, "telnet:", &p))
3003 qemu_opt_set(opts, "telnet", "on");
3004 return opts;
3005 }
3006 if (strstart(filename, "udp:", &p)) {
3007 qemu_opt_set(opts, "backend", "udp");
3008 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3009 host[0] = 0;
3010 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3011 goto fail;
3012 }
3013 }
3014 qemu_opt_set(opts, "host", host);
3015 qemu_opt_set(opts, "port", port);
3016 if (p[pos] == '@') {
3017 p += pos + 1;
3018 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3019 host[0] = 0;
3020 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3021 goto fail;
3022 }
3023 }
3024 qemu_opt_set(opts, "localaddr", host);
3025 qemu_opt_set(opts, "localport", port);
3026 }
3027 return opts;
3028 }
3029 if (strstart(filename, "unix:", &p)) {
3030 qemu_opt_set(opts, "backend", "socket");
3031 if (qemu_opts_do_parse(opts, p, "path") != 0)
3032 goto fail;
3033 return opts;
3034 }
3035 if (strstart(filename, "/dev/parport", NULL) ||
3036 strstart(filename, "/dev/ppi", NULL)) {
3037 qemu_opt_set(opts, "backend", "parport");
3038 qemu_opt_set(opts, "path", filename);
3039 return opts;
3040 }
3041 if (strstart(filename, "/dev/", NULL)) {
3042 qemu_opt_set(opts, "backend", "tty");
3043 qemu_opt_set(opts, "path", filename);
3044 return opts;
3045 }
3046
3047 fail:
3048 qemu_opts_del(opts);
3049 return NULL;
3050 }
3051
3052 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3053 Error **errp)
3054 {
3055 const char *path = qemu_opt_get(opts, "path");
3056
3057 if (path == NULL) {
3058 error_setg(errp, "chardev: file: no filename given");
3059 return;
3060 }
3061 backend->file = g_new0(ChardevFile, 1);
3062 backend->file->out = g_strdup(path);
3063 }
3064
3065 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3066 Error **errp)
3067 {
3068 backend->stdio = g_new0(ChardevStdio, 1);
3069 backend->stdio->has_signal = true;
3070 backend->stdio->signal =
3071 qemu_opt_get_bool(opts, "signal", display_type != DT_NOGRAPHIC);
3072 }
3073
3074 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3075 Error **errp)
3076 {
3077 const char *device = qemu_opt_get(opts, "path");
3078
3079 if (device == NULL) {
3080 error_setg(errp, "chardev: serial/tty: no device path given");
3081 return;
3082 }
3083 backend->serial = g_new0(ChardevHostdev, 1);
3084 backend->serial->device = g_strdup(device);
3085 }
3086
3087 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3088 Error **errp)
3089 {
3090 const char *device = qemu_opt_get(opts, "path");
3091
3092 if (device == NULL) {
3093 error_setg(errp, "chardev: parallel: no device path given");
3094 return;
3095 }
3096 backend->parallel = g_new0(ChardevHostdev, 1);
3097 backend->parallel->device = g_strdup(device);
3098 }
3099
3100 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3101 Error **errp)
3102 {
3103 const char *device = qemu_opt_get(opts, "path");
3104
3105 if (device == NULL) {
3106 error_setg(errp, "chardev: pipe: no device path given");
3107 return;
3108 }
3109 backend->pipe = g_new0(ChardevHostdev, 1);
3110 backend->pipe->device = g_strdup(device);
3111 }
3112
3113 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3114 Error **errp)
3115 {
3116 int val;
3117
3118 backend->memory = g_new0(ChardevRingbuf, 1);
3119
3120 val = qemu_opt_get_number(opts, "size", 0);
3121 if (val != 0) {
3122 backend->memory->has_size = true;
3123 backend->memory->size = val;
3124 }
3125 }
3126
3127 typedef struct CharDriver {
3128 const char *name;
3129 /* old, pre qapi */
3130 CharDriverState *(*open)(QemuOpts *opts);
3131 /* new, qapi-based */
3132 int kind;
3133 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3134 } CharDriver;
3135
3136 static GSList *backends;
3137
3138 void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *))
3139 {
3140 CharDriver *s;
3141
3142 s = g_malloc0(sizeof(*s));
3143 s->name = g_strdup(name);
3144 s->open = open;
3145
3146 backends = g_slist_append(backends, s);
3147 }
3148
3149 void register_char_driver_qapi(const char *name, int kind,
3150 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp))
3151 {
3152 CharDriver *s;
3153
3154 s = g_malloc0(sizeof(*s));
3155 s->name = g_strdup(name);
3156 s->kind = kind;
3157 s->parse = parse;
3158
3159 backends = g_slist_append(backends, s);
3160 }
3161
3162 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3163 void (*init)(struct CharDriverState *s),
3164 Error **errp)
3165 {
3166 CharDriver *cd;
3167 CharDriverState *chr;
3168 GSList *i;
3169
3170 if (qemu_opts_id(opts) == NULL) {
3171 error_setg(errp, "chardev: no id specified");
3172 goto err;
3173 }
3174
3175 if (qemu_opt_get(opts, "backend") == NULL) {
3176 error_setg(errp, "chardev: \"%s\" missing backend",
3177 qemu_opts_id(opts));
3178 goto err;
3179 }
3180 for (i = backends; i; i = i->next) {
3181 cd = i->data;
3182
3183 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3184 break;
3185 }
3186 }
3187 if (i == NULL) {
3188 error_setg(errp, "chardev: backend \"%s\" not found",
3189 qemu_opt_get(opts, "backend"));
3190 return NULL;
3191 }
3192
3193 if (!cd->open) {
3194 /* using new, qapi init */
3195 ChardevBackend *backend = g_new0(ChardevBackend, 1);
3196 ChardevReturn *ret = NULL;
3197 const char *id = qemu_opts_id(opts);
3198 const char *bid = NULL;
3199
3200 if (qemu_opt_get_bool(opts, "mux", 0)) {
3201 bid = g_strdup_printf("%s-base", id);
3202 }
3203
3204 chr = NULL;
3205 backend->kind = cd->kind;
3206 if (cd->parse) {
3207 cd->parse(opts, backend, errp);
3208 if (error_is_set(errp)) {
3209 goto qapi_out;
3210 }
3211 }
3212 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3213 if (error_is_set(errp)) {
3214 goto qapi_out;
3215 }
3216
3217 if (bid) {
3218 qapi_free_ChardevBackend(backend);
3219 qapi_free_ChardevReturn(ret);
3220 backend = g_new0(ChardevBackend, 1);
3221 backend->mux = g_new0(ChardevMux, 1);
3222 backend->kind = CHARDEV_BACKEND_KIND_MUX;
3223 backend->mux->chardev = g_strdup(bid);
3224 ret = qmp_chardev_add(id, backend, errp);
3225 if (error_is_set(errp)) {
3226 goto qapi_out;
3227 }
3228 }
3229
3230 chr = qemu_chr_find(id);
3231
3232 qapi_out:
3233 qapi_free_ChardevBackend(backend);
3234 qapi_free_ChardevReturn(ret);
3235 return chr;
3236 }
3237
3238 chr = cd->open(opts);
3239 if (!chr) {
3240 error_setg(errp, "chardev: opening backend \"%s\" failed",
3241 qemu_opt_get(opts, "backend"));
3242 goto err;
3243 }
3244
3245 if (!chr->filename)
3246 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
3247 chr->init = init;
3248 /* if we didn't create the chardev via qmp_chardev_add, we
3249 * need to send the OPENED event here
3250 */
3251 if (!chr->explicit_be_open) {
3252 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
3253 }
3254 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3255
3256 if (qemu_opt_get_bool(opts, "mux", 0)) {
3257 CharDriverState *base = chr;
3258 int len = strlen(qemu_opts_id(opts)) + 6;
3259 base->label = g_malloc(len);
3260 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
3261 chr = qemu_chr_open_mux(base);
3262 chr->filename = base->filename;
3263 chr->avail_connections = MAX_MUX;
3264 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3265 } else {
3266 chr->avail_connections = 1;
3267 }
3268 chr->label = g_strdup(qemu_opts_id(opts));
3269 chr->opts = opts;
3270 return chr;
3271
3272 err:
3273 qemu_opts_del(opts);
3274 return NULL;
3275 }
3276
3277 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3278 {
3279 const char *p;
3280 CharDriverState *chr;
3281 QemuOpts *opts;
3282 Error *err = NULL;
3283
3284 if (strstart(filename, "chardev:", &p)) {
3285 return qemu_chr_find(p);
3286 }
3287
3288 opts = qemu_chr_parse_compat(label, filename);
3289 if (!opts)
3290 return NULL;
3291
3292 chr = qemu_chr_new_from_opts(opts, init, &err);
3293 if (error_is_set(&err)) {
3294 fprintf(stderr, "%s\n", error_get_pretty(err));
3295 error_free(err);
3296 }
3297 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3298 qemu_chr_fe_claim_no_fail(chr);
3299 monitor_init(chr, MONITOR_USE_READLINE);
3300 }
3301 return chr;
3302 }
3303
3304 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3305 {
3306 if (chr->chr_set_echo) {
3307 chr->chr_set_echo(chr, echo);
3308 }
3309 }
3310
3311 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
3312 {
3313 if (chr->fe_open == fe_open) {
3314 return;
3315 }
3316 chr->fe_open = fe_open;
3317 if (chr->chr_set_fe_open) {
3318 chr->chr_set_fe_open(chr, fe_open);
3319 }
3320 }
3321
3322 int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3323 GIOFunc func, void *user_data)
3324 {
3325 GSource *src;
3326 guint tag;
3327
3328 if (s->chr_add_watch == NULL) {
3329 return -ENOSYS;
3330 }
3331
3332 src = s->chr_add_watch(s, cond);
3333 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3334 tag = g_source_attach(src, NULL);
3335 g_source_unref(src);
3336
3337 return tag;
3338 }
3339
3340 int qemu_chr_fe_claim(CharDriverState *s)
3341 {
3342 if (s->avail_connections < 1) {
3343 return -1;
3344 }
3345 s->avail_connections--;
3346 return 0;
3347 }
3348
3349 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
3350 {
3351 if (qemu_chr_fe_claim(s) != 0) {
3352 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
3353 __func__, s->label);
3354 exit(1);
3355 }
3356 }
3357
3358 void qemu_chr_fe_release(CharDriverState *s)
3359 {
3360 s->avail_connections++;
3361 }
3362
3363 void qemu_chr_delete(CharDriverState *chr)
3364 {
3365 QTAILQ_REMOVE(&chardevs, chr, next);
3366 if (chr->chr_close) {
3367 chr->chr_close(chr);
3368 }
3369 g_free(chr->filename);
3370 g_free(chr->label);
3371 if (chr->opts) {
3372 qemu_opts_del(chr->opts);
3373 }
3374 g_free(chr);
3375 }
3376
3377 ChardevInfoList *qmp_query_chardev(Error **errp)
3378 {
3379 ChardevInfoList *chr_list = NULL;
3380 CharDriverState *chr;
3381
3382 QTAILQ_FOREACH(chr, &chardevs, next) {
3383 ChardevInfoList *info = g_malloc0(sizeof(*info));
3384 info->value = g_malloc0(sizeof(*info->value));
3385 info->value->label = g_strdup(chr->label);
3386 info->value->filename = g_strdup(chr->filename);
3387
3388 info->next = chr_list;
3389 chr_list = info;
3390 }
3391
3392 return chr_list;
3393 }
3394
3395 CharDriverState *qemu_chr_find(const char *name)
3396 {
3397 CharDriverState *chr;
3398
3399 QTAILQ_FOREACH(chr, &chardevs, next) {
3400 if (strcmp(chr->label, name) != 0)
3401 continue;
3402 return chr;
3403 }
3404 return NULL;
3405 }
3406
3407 /* Get a character (serial) device interface. */
3408 CharDriverState *qemu_char_get_next_serial(void)
3409 {
3410 static int next_serial;
3411 CharDriverState *chr;
3412
3413 /* FIXME: This function needs to go away: use chardev properties! */
3414
3415 while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
3416 chr = serial_hds[next_serial++];
3417 qemu_chr_fe_claim_no_fail(chr);
3418 return chr;
3419 }
3420 return NULL;
3421 }
3422
3423 QemuOptsList qemu_chardev_opts = {
3424 .name = "chardev",
3425 .implied_opt_name = "backend",
3426 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3427 .desc = {
3428 {
3429 .name = "backend",
3430 .type = QEMU_OPT_STRING,
3431 },{
3432 .name = "path",
3433 .type = QEMU_OPT_STRING,
3434 },{
3435 .name = "host",
3436 .type = QEMU_OPT_STRING,
3437 },{
3438 .name = "port",
3439 .type = QEMU_OPT_STRING,
3440 },{
3441 .name = "localaddr",
3442 .type = QEMU_OPT_STRING,
3443 },{
3444 .name = "localport",
3445 .type = QEMU_OPT_STRING,
3446 },{
3447 .name = "to",
3448 .type = QEMU_OPT_NUMBER,
3449 },{
3450 .name = "ipv4",
3451 .type = QEMU_OPT_BOOL,
3452 },{
3453 .name = "ipv6",
3454 .type = QEMU_OPT_BOOL,
3455 },{
3456 .name = "wait",
3457 .type = QEMU_OPT_BOOL,
3458 },{
3459 .name = "server",
3460 .type = QEMU_OPT_BOOL,
3461 },{
3462 .name = "delay",
3463 .type = QEMU_OPT_BOOL,
3464 },{
3465 .name = "telnet",
3466 .type = QEMU_OPT_BOOL,
3467 },{
3468 .name = "width",
3469 .type = QEMU_OPT_NUMBER,
3470 },{
3471 .name = "height",
3472 .type = QEMU_OPT_NUMBER,
3473 },{
3474 .name = "cols",
3475 .type = QEMU_OPT_NUMBER,
3476 },{
3477 .name = "rows",
3478 .type = QEMU_OPT_NUMBER,
3479 },{
3480 .name = "mux",
3481 .type = QEMU_OPT_BOOL,
3482 },{
3483 .name = "signal",
3484 .type = QEMU_OPT_BOOL,
3485 },{
3486 .name = "name",
3487 .type = QEMU_OPT_STRING,
3488 },{
3489 .name = "debug",
3490 .type = QEMU_OPT_NUMBER,
3491 },{
3492 .name = "size",
3493 .type = QEMU_OPT_SIZE,
3494 },
3495 { /* end of list */ }
3496 },
3497 };
3498
3499 #ifdef _WIN32
3500
3501 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3502 {
3503 HANDLE out;
3504
3505 if (file->in) {
3506 error_setg(errp, "input file not supported");
3507 return NULL;
3508 }
3509
3510 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
3511 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
3512 if (out == INVALID_HANDLE_VALUE) {
3513 error_setg(errp, "open %s failed", file->out);
3514 return NULL;
3515 }
3516 return qemu_chr_open_win_file(out);
3517 }
3518
3519 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3520 Error **errp)
3521 {
3522 return qemu_chr_open_win_path(serial->device);
3523 }
3524
3525 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3526 Error **errp)
3527 {
3528 error_setg(errp, "character device backend type 'parallel' not supported");
3529 return NULL;
3530 }
3531
3532 #else /* WIN32 */
3533
3534 static int qmp_chardev_open_file_source(char *src, int flags,
3535 Error **errp)
3536 {
3537 int fd = -1;
3538
3539 TFR(fd = qemu_open(src, flags, 0666));
3540 if (fd == -1) {
3541 error_setg(errp, "open %s: %s", src, strerror(errno));
3542 }
3543 return fd;
3544 }
3545
3546 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3547 {
3548 int flags, in = -1, out = -1;
3549
3550 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
3551 out = qmp_chardev_open_file_source(file->out, flags, errp);
3552 if (error_is_set(errp)) {
3553 return NULL;
3554 }
3555
3556 if (file->in) {
3557 flags = O_RDONLY;
3558 in = qmp_chardev_open_file_source(file->in, flags, errp);
3559 if (error_is_set(errp)) {
3560 qemu_close(out);
3561 return NULL;
3562 }
3563 }
3564
3565 return qemu_chr_open_fd(in, out);
3566 }
3567
3568 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3569 Error **errp)
3570 {
3571 #ifdef HAVE_CHARDEV_TTY
3572 int fd;
3573
3574 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
3575 if (error_is_set(errp)) {
3576 return NULL;
3577 }
3578 qemu_set_nonblock(fd);
3579 return qemu_chr_open_tty_fd(fd);
3580 #else
3581 error_setg(errp, "character device backend type 'serial' not supported");
3582 return NULL;
3583 #endif
3584 }
3585
3586 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3587 Error **errp)
3588 {
3589 #ifdef HAVE_CHARDEV_PARPORT
3590 int fd;
3591
3592 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
3593 if (error_is_set(errp)) {
3594 return NULL;
3595 }
3596 return qemu_chr_open_pp_fd(fd);
3597 #else
3598 error_setg(errp, "character device backend type 'parallel' not supported");
3599 return NULL;
3600 #endif
3601 }
3602
3603 #endif /* WIN32 */
3604
3605 static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
3606 Error **errp)
3607 {
3608 SocketAddress *addr = sock->addr;
3609 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
3610 bool is_listen = sock->has_server ? sock->server : true;
3611 bool is_telnet = sock->has_telnet ? sock->telnet : false;
3612 bool is_waitconnect = sock->has_wait ? sock->wait : false;
3613 int fd;
3614
3615 if (is_listen) {
3616 fd = socket_listen(addr, errp);
3617 } else {
3618 fd = socket_connect(addr, errp, NULL, NULL);
3619 }
3620 if (error_is_set(errp)) {
3621 return NULL;
3622 }
3623 return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
3624 is_telnet, is_waitconnect, errp);
3625 }
3626
3627 static CharDriverState *qmp_chardev_open_udp(ChardevUdp *udp,
3628 Error **errp)
3629 {
3630 int fd;
3631
3632 fd = socket_dgram(udp->remote, udp->local, errp);
3633 if (error_is_set(errp)) {
3634 return NULL;
3635 }
3636 return qemu_chr_open_udp_fd(fd);
3637 }
3638
3639 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
3640 Error **errp)
3641 {
3642 ChardevReturn *ret = g_new0(ChardevReturn, 1);
3643 CharDriverState *base, *chr = NULL;
3644
3645 chr = qemu_chr_find(id);
3646 if (chr) {
3647 error_setg(errp, "Chardev '%s' already exists", id);
3648 g_free(ret);
3649 return NULL;
3650 }
3651
3652 switch (backend->kind) {
3653 case CHARDEV_BACKEND_KIND_FILE:
3654 chr = qmp_chardev_open_file(backend->file, errp);
3655 break;
3656 case CHARDEV_BACKEND_KIND_SERIAL:
3657 chr = qmp_chardev_open_serial(backend->serial, errp);
3658 break;
3659 case CHARDEV_BACKEND_KIND_PARALLEL:
3660 chr = qmp_chardev_open_parallel(backend->parallel, errp);
3661 break;
3662 case CHARDEV_BACKEND_KIND_PIPE:
3663 chr = qemu_chr_open_pipe(backend->pipe);
3664 break;
3665 case CHARDEV_BACKEND_KIND_SOCKET:
3666 chr = qmp_chardev_open_socket(backend->socket, errp);
3667 break;
3668 case CHARDEV_BACKEND_KIND_UDP:
3669 chr = qmp_chardev_open_udp(backend->udp, errp);
3670 break;
3671 #ifdef HAVE_CHARDEV_TTY
3672 case CHARDEV_BACKEND_KIND_PTY:
3673 chr = qemu_chr_open_pty(id, ret);
3674 break;
3675 #endif
3676 case CHARDEV_BACKEND_KIND_NULL:
3677 chr = qemu_chr_open_null();
3678 break;
3679 case CHARDEV_BACKEND_KIND_MUX:
3680 base = qemu_chr_find(backend->mux->chardev);
3681 if (base == NULL) {
3682 error_setg(errp, "mux: base chardev %s not found",
3683 backend->mux->chardev);
3684 break;
3685 }
3686 chr = qemu_chr_open_mux(base);
3687 break;
3688 case CHARDEV_BACKEND_KIND_MSMOUSE:
3689 chr = qemu_chr_open_msmouse();
3690 break;
3691 #ifdef CONFIG_BRLAPI
3692 case CHARDEV_BACKEND_KIND_BRAILLE:
3693 chr = chr_baum_init();
3694 break;
3695 #endif
3696 case CHARDEV_BACKEND_KIND_STDIO:
3697 chr = qemu_chr_open_stdio(backend->stdio);
3698 break;
3699 #ifdef _WIN32
3700 case CHARDEV_BACKEND_KIND_CONSOLE:
3701 chr = qemu_chr_open_win_con();
3702 break;
3703 #endif
3704 #ifdef CONFIG_SPICE
3705 case CHARDEV_BACKEND_KIND_SPICEVMC:
3706 chr = qemu_chr_open_spice_vmc(backend->spicevmc->type);
3707 break;
3708 case CHARDEV_BACKEND_KIND_SPICEPORT:
3709 chr = qemu_chr_open_spice_port(backend->spiceport->fqdn);
3710 break;
3711 #endif
3712 case CHARDEV_BACKEND_KIND_VC:
3713 chr = vc_init(backend->vc);
3714 break;
3715 case CHARDEV_BACKEND_KIND_MEMORY:
3716 chr = qemu_chr_open_ringbuf(backend->memory, errp);
3717 break;
3718 default:
3719 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
3720 break;
3721 }
3722
3723 if (chr == NULL && !error_is_set(errp)) {
3724 error_setg(errp, "Failed to create chardev");
3725 }
3726 if (chr) {
3727 chr->label = g_strdup(id);
3728 chr->avail_connections =
3729 (backend->kind == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
3730 if (!chr->filename) {
3731 chr->filename = g_strdup(ChardevBackendKind_lookup[backend->kind]);
3732 }
3733 if (!chr->explicit_be_open) {
3734 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
3735 }
3736 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3737 return ret;
3738 } else {
3739 g_free(ret);
3740 return NULL;
3741 }
3742 }
3743
3744 void qmp_chardev_remove(const char *id, Error **errp)
3745 {
3746 CharDriverState *chr;
3747
3748 chr = qemu_chr_find(id);
3749 if (NULL == chr) {
3750 error_setg(errp, "Chardev '%s' not found", id);
3751 return;
3752 }
3753 if (chr->chr_can_read || chr->chr_read ||
3754 chr->chr_event || chr->handler_opaque) {
3755 error_setg(errp, "Chardev '%s' is busy", id);
3756 return;
3757 }
3758 qemu_chr_delete(chr);
3759 }
3760
3761 static void register_types(void)
3762 {
3763 register_char_driver_qapi("null", CHARDEV_BACKEND_KIND_NULL, NULL);
3764 register_char_driver("socket", qemu_chr_open_socket);
3765 register_char_driver("udp", qemu_chr_open_udp);
3766 register_char_driver_qapi("memory", CHARDEV_BACKEND_KIND_MEMORY,
3767 qemu_chr_parse_ringbuf);
3768 register_char_driver_qapi("file", CHARDEV_BACKEND_KIND_FILE,
3769 qemu_chr_parse_file_out);
3770 register_char_driver_qapi("stdio", CHARDEV_BACKEND_KIND_STDIO,
3771 qemu_chr_parse_stdio);
3772 register_char_driver_qapi("serial", CHARDEV_BACKEND_KIND_SERIAL,
3773 qemu_chr_parse_serial);
3774 register_char_driver_qapi("tty", CHARDEV_BACKEND_KIND_SERIAL,
3775 qemu_chr_parse_serial);
3776 register_char_driver_qapi("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
3777 qemu_chr_parse_parallel);
3778 register_char_driver_qapi("parport", CHARDEV_BACKEND_KIND_PARALLEL,
3779 qemu_chr_parse_parallel);
3780 register_char_driver_qapi("pty", CHARDEV_BACKEND_KIND_PTY, NULL);
3781 register_char_driver_qapi("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL);
3782 register_char_driver_qapi("pipe", CHARDEV_BACKEND_KIND_PIPE,
3783 qemu_chr_parse_pipe);
3784 }
3785
3786 type_init(register_types);
Qemu copy for testing