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qemu-char: Fix potential out of bounds access to local arrays
[qemu/ar7.git] / qemu-char.c
blob6d393e6a1b329652673de5c8f1a5b694d7291aab
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 #endif
80 #endif
81 #endif
82
83 #include "qemu/sockets.h"
84 #include "ui/qemu-spice.h"
85
86 #define READ_BUF_LEN 4096
87
88 /***********************************************************/
89 /* character device */
90
91 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
92 QTAILQ_HEAD_INITIALIZER(chardevs);
93
94 void qemu_chr_be_event(CharDriverState *s, int event)
95 {
96 /* Keep track if the char device is open */
97 switch (event) {
98 case CHR_EVENT_OPENED:
99 s->be_open = 1;
100 break;
101 case CHR_EVENT_CLOSED:
102 s->be_open = 0;
103 break;
104 }
105
106 if (!s->chr_event)
107 return;
108 s->chr_event(s->handler_opaque, event);
109 }
110
111 void qemu_chr_be_generic_open(CharDriverState *s)
112 {
113 qemu_chr_be_event(s, CHR_EVENT_OPENED);
114 }
115
116 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
117 {
118 return s->chr_write(s, buf, len);
119 }
120
121 int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len)
122 {
123 int offset = 0;
124 int res;
125
126 while (offset < len) {
127 do {
128 res = s->chr_write(s, buf + offset, len - offset);
129 if (res == -1 && errno == EAGAIN) {
130 g_usleep(100);
131 }
132 } while (res == -1 && errno == EAGAIN);
133
134 if (res == 0) {
135 break;
136 }
137
138 if (res < 0) {
139 return res;
140 }
141
142 offset += res;
143 }
144
145 return offset;
146 }
147
148 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
149 {
150 if (!s->chr_ioctl)
151 return -ENOTSUP;
152 return s->chr_ioctl(s, cmd, arg);
153 }
154
155 int qemu_chr_be_can_write(CharDriverState *s)
156 {
157 if (!s->chr_can_read)
158 return 0;
159 return s->chr_can_read(s->handler_opaque);
160 }
161
162 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
163 {
164 if (s->chr_read) {
165 s->chr_read(s->handler_opaque, buf, len);
166 }
167 }
168
169 int qemu_chr_fe_get_msgfd(CharDriverState *s)
170 {
171 return s->get_msgfd ? s->get_msgfd(s) : -1;
172 }
173
174 int qemu_chr_add_client(CharDriverState *s, int fd)
175 {
176 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
177 }
178
179 void qemu_chr_accept_input(CharDriverState *s)
180 {
181 if (s->chr_accept_input)
182 s->chr_accept_input(s);
183 qemu_notify_event();
184 }
185
186 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
187 {
188 char buf[READ_BUF_LEN];
189 va_list ap;
190 va_start(ap, fmt);
191 vsnprintf(buf, sizeof(buf), fmt, ap);
192 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
193 va_end(ap);
194 }
195
196 void qemu_chr_add_handlers(CharDriverState *s,
197 IOCanReadHandler *fd_can_read,
198 IOReadHandler *fd_read,
199 IOEventHandler *fd_event,
200 void *opaque)
201 {
202 int fe_open;
203
204 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
205 fe_open = 0;
206 } else {
207 fe_open = 1;
208 }
209 s->chr_can_read = fd_can_read;
210 s->chr_read = fd_read;
211 s->chr_event = fd_event;
212 s->handler_opaque = opaque;
213 if (s->chr_update_read_handler)
214 s->chr_update_read_handler(s);
215
216 if (!s->explicit_fe_open) {
217 qemu_chr_fe_set_open(s, fe_open);
218 }
219
220 /* We're connecting to an already opened device, so let's make sure we
221 also get the open event */
222 if (fe_open && s->be_open) {
223 qemu_chr_be_generic_open(s);
224 }
225 }
226
227 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
228 {
229 return len;
230 }
231
232 static CharDriverState *qemu_chr_open_null(void)
233 {
234 CharDriverState *chr;
235
236 chr = g_malloc0(sizeof(CharDriverState));
237 chr->chr_write = null_chr_write;
238 chr->explicit_be_open = true;
239 return chr;
240 }
241
242 /* MUX driver for serial I/O splitting */
243 #define MAX_MUX 4
244 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
245 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
246 typedef struct {
247 IOCanReadHandler *chr_can_read[MAX_MUX];
248 IOReadHandler *chr_read[MAX_MUX];
249 IOEventHandler *chr_event[MAX_MUX];
250 void *ext_opaque[MAX_MUX];
251 CharDriverState *drv;
252 int focus;
253 int mux_cnt;
254 int term_got_escape;
255 int max_size;
256 /* Intermediate input buffer allows to catch escape sequences even if the
257 currently active device is not accepting any input - but only until it
258 is full as well. */
259 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
260 int prod[MAX_MUX];
261 int cons[MAX_MUX];
262 int timestamps;
263 int linestart;
264 int64_t timestamps_start;
265 } MuxDriver;
266
267
268 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
269 {
270 MuxDriver *d = chr->opaque;
271 int ret;
272 if (!d->timestamps) {
273 ret = d->drv->chr_write(d->drv, buf, len);
274 } else {
275 int i;
276
277 ret = 0;
278 for (i = 0; i < len; i++) {
279 if (d->linestart) {
280 char buf1[64];
281 int64_t ti;
282 int secs;
283
284 ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
285 if (d->timestamps_start == -1)
286 d->timestamps_start = ti;
287 ti -= d->timestamps_start;
288 secs = ti / 1000;
289 snprintf(buf1, sizeof(buf1),
290 "[%02d:%02d:%02d.%03d] ",
291 secs / 3600,
292 (secs / 60) % 60,
293 secs % 60,
294 (int)(ti % 1000));
295 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
296 d->linestart = 0;
297 }
298 ret += d->drv->chr_write(d->drv, buf+i, 1);
299 if (buf[i] == '\n') {
300 d->linestart = 1;
301 }
302 }
303 }
304 return ret;
305 }
306
307 static const char * const mux_help[] = {
308 "% h print this help\n\r",
309 "% x exit emulator\n\r",
310 "% s save disk data back to file (if -snapshot)\n\r",
311 "% t toggle console timestamps\n\r"
312 "% b send break (magic sysrq)\n\r",
313 "% c switch between console and monitor\n\r",
314 "% % sends %\n\r",
315 NULL
316 };
317
318 int term_escape_char = 0x01; /* ctrl-a is used for escape */
319 static void mux_print_help(CharDriverState *chr)
320 {
321 int i, j;
322 char ebuf[15] = "Escape-Char";
323 char cbuf[50] = "\n\r";
324
325 if (term_escape_char > 0 && term_escape_char < 26) {
326 snprintf(cbuf, sizeof(cbuf), "\n\r");
327 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
328 } else {
329 snprintf(cbuf, sizeof(cbuf),
330 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
331 term_escape_char);
332 }
333 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
334 for (i = 0; mux_help[i] != NULL; i++) {
335 for (j=0; mux_help[i][j] != '\0'; j++) {
336 if (mux_help[i][j] == '%')
337 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
338 else
339 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
340 }
341 }
342 }
343
344 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
345 {
346 if (d->chr_event[mux_nr])
347 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
348 }
349
350 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
351 {
352 if (d->term_got_escape) {
353 d->term_got_escape = 0;
354 if (ch == term_escape_char)
355 goto send_char;
356 switch(ch) {
357 case '?':
358 case 'h':
359 mux_print_help(chr);
360 break;
361 case 'x':
362 {
363 const char *term = "QEMU: Terminated\n\r";
364 chr->chr_write(chr,(uint8_t *)term,strlen(term));
365 exit(0);
366 break;
367 }
368 case 's':
369 bdrv_commit_all();
370 break;
371 case 'b':
372 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
373 break;
374 case 'c':
375 /* Switch to the next registered device */
376 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
377 d->focus++;
378 if (d->focus >= d->mux_cnt)
379 d->focus = 0;
380 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
381 break;
382 case 't':
383 d->timestamps = !d->timestamps;
384 d->timestamps_start = -1;
385 d->linestart = 0;
386 break;
387 }
388 } else if (ch == term_escape_char) {
389 d->term_got_escape = 1;
390 } else {
391 send_char:
392 return 1;
393 }
394 return 0;
395 }
396
397 static void mux_chr_accept_input(CharDriverState *chr)
398 {
399 MuxDriver *d = chr->opaque;
400 int m = d->focus;
401
402 while (d->prod[m] != d->cons[m] &&
403 d->chr_can_read[m] &&
404 d->chr_can_read[m](d->ext_opaque[m])) {
405 d->chr_read[m](d->ext_opaque[m],
406 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
407 }
408 }
409
410 static int mux_chr_can_read(void *opaque)
411 {
412 CharDriverState *chr = opaque;
413 MuxDriver *d = chr->opaque;
414 int m = d->focus;
415
416 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
417 return 1;
418 if (d->chr_can_read[m])
419 return d->chr_can_read[m](d->ext_opaque[m]);
420 return 0;
421 }
422
423 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
424 {
425 CharDriverState *chr = opaque;
426 MuxDriver *d = chr->opaque;
427 int m = d->focus;
428 int i;
429
430 mux_chr_accept_input (opaque);
431
432 for(i = 0; i < size; i++)
433 if (mux_proc_byte(chr, d, buf[i])) {
434 if (d->prod[m] == d->cons[m] &&
435 d->chr_can_read[m] &&
436 d->chr_can_read[m](d->ext_opaque[m]))
437 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
438 else
439 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
440 }
441 }
442
443 static void mux_chr_event(void *opaque, int event)
444 {
445 CharDriverState *chr = opaque;
446 MuxDriver *d = chr->opaque;
447 int i;
448
449 /* Send the event to all registered listeners */
450 for (i = 0; i < d->mux_cnt; i++)
451 mux_chr_send_event(d, i, event);
452 }
453
454 static void mux_chr_update_read_handler(CharDriverState *chr)
455 {
456 MuxDriver *d = chr->opaque;
457
458 if (d->mux_cnt >= MAX_MUX) {
459 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
460 return;
461 }
462 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
463 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
464 d->chr_read[d->mux_cnt] = chr->chr_read;
465 d->chr_event[d->mux_cnt] = chr->chr_event;
466 /* Fix up the real driver with mux routines */
467 if (d->mux_cnt == 0) {
468 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
469 mux_chr_event, chr);
470 }
471 if (d->focus != -1) {
472 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
473 }
474 d->focus = d->mux_cnt;
475 d->mux_cnt++;
476 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
477 }
478
479 static bool muxes_realized;
480
481 /**
482 * Called after processing of default and command-line-specified
483 * chardevs to deliver CHR_EVENT_OPENED events to any FEs attached
484 * to a mux chardev. This is done here to ensure that
485 * output/prompts/banners are only displayed for the FE that has
486 * focus when initial command-line processing/machine init is
487 * completed.
488 *
489 * After this point, any new FE attached to any new or existing
490 * mux will receive CHR_EVENT_OPENED notifications for the BE
491 * immediately.
492 */
493 static void muxes_realize_done(Notifier *notifier, void *unused)
494 {
495 CharDriverState *chr;
496
497 QTAILQ_FOREACH(chr, &chardevs, next) {
498 if (chr->is_mux) {
499 MuxDriver *d = chr->opaque;
500 int i;
501
502 /* send OPENED to all already-attached FEs */
503 for (i = 0; i < d->mux_cnt; i++) {
504 mux_chr_send_event(d, i, CHR_EVENT_OPENED);
505 }
506 /* mark mux as OPENED so any new FEs will immediately receive
507 * OPENED event
508 */
509 qemu_chr_be_generic_open(chr);
510 }
511 }
512 muxes_realized = true;
513 }
514
515 static Notifier muxes_realize_notify = {
516 .notify = muxes_realize_done,
517 };
518
519 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
520 {
521 CharDriverState *chr;
522 MuxDriver *d;
523
524 chr = g_malloc0(sizeof(CharDriverState));
525 d = g_malloc0(sizeof(MuxDriver));
526
527 chr->opaque = d;
528 d->drv = drv;
529 d->focus = -1;
530 chr->chr_write = mux_chr_write;
531 chr->chr_update_read_handler = mux_chr_update_read_handler;
532 chr->chr_accept_input = mux_chr_accept_input;
533 /* Frontend guest-open / -close notification is not support with muxes */
534 chr->chr_set_fe_open = NULL;
535 /* only default to opened state if we've realized the initial
536 * set of muxes
537 */
538 chr->explicit_be_open = muxes_realized ? 0 : 1;
539 chr->is_mux = 1;
540
541 return chr;
542 }
543
544
545 #ifdef _WIN32
546 int send_all(int fd, const void *buf, int len1)
547 {
548 int ret, len;
549
550 len = len1;
551 while (len > 0) {
552 ret = send(fd, buf, len, 0);
553 if (ret < 0) {
554 errno = WSAGetLastError();
555 if (errno != WSAEWOULDBLOCK) {
556 return -1;
557 }
558 } else if (ret == 0) {
559 break;
560 } else {
561 buf += ret;
562 len -= ret;
563 }
564 }
565 return len1 - len;
566 }
567
568 #else
569
570 int send_all(int fd, const void *_buf, int len1)
571 {
572 int ret, len;
573 const uint8_t *buf = _buf;
574
575 len = len1;
576 while (len > 0) {
577 ret = write(fd, buf, len);
578 if (ret < 0) {
579 if (errno != EINTR && errno != EAGAIN)
580 return -1;
581 } else if (ret == 0) {
582 break;
583 } else {
584 buf += ret;
585 len -= ret;
586 }
587 }
588 return len1 - len;
589 }
590
591 int recv_all(int fd, void *_buf, int len1, bool single_read)
592 {
593 int ret, len;
594 uint8_t *buf = _buf;
595
596 len = len1;
597 while ((len > 0) && (ret = read(fd, buf, len)) != 0) {
598 if (ret < 0) {
599 if (errno != EINTR && errno != EAGAIN) {
600 return -1;
601 }
602 continue;
603 } else {
604 if (single_read) {
605 return ret;
606 }
607 buf += ret;
608 len -= ret;
609 }
610 }
611 return len1 - len;
612 }
613
614 #endif /* !_WIN32 */
615
616 typedef struct IOWatchPoll
617 {
618 GSource parent;
619
620 GIOChannel *channel;
621 GSource *src;
622
623 IOCanReadHandler *fd_can_read;
624 GSourceFunc fd_read;
625 void *opaque;
626 } IOWatchPoll;
627
628 static IOWatchPoll *io_watch_poll_from_source(GSource *source)
629 {
630 return container_of(source, IOWatchPoll, parent);
631 }
632
633 static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_)
634 {
635 IOWatchPoll *iwp = io_watch_poll_from_source(source);
636 bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
637 bool was_active = iwp->src != NULL;
638 if (was_active == now_active) {
639 return FALSE;
640 }
641
642 if (now_active) {
643 iwp->src = g_io_create_watch(iwp->channel, G_IO_IN | G_IO_ERR | G_IO_HUP);
644 g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
645 g_source_attach(iwp->src, NULL);
646 } else {
647 g_source_destroy(iwp->src);
648 g_source_unref(iwp->src);
649 iwp->src = NULL;
650 }
651 return FALSE;
652 }
653
654 static gboolean io_watch_poll_check(GSource *source)
655 {
656 return FALSE;
657 }
658
659 static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
660 gpointer user_data)
661 {
662 abort();
663 }
664
665 static void io_watch_poll_finalize(GSource *source)
666 {
667 /* Due to a glib bug, removing the last reference to a source
668 * inside a finalize callback causes recursive locking (and a
669 * deadlock). This is not a problem inside other callbacks,
670 * including dispatch callbacks, so we call io_remove_watch_poll
671 * to remove this source. At this point, iwp->src must
672 * be NULL, or we would leak it.
673 *
674 * This would be solved much more elegantly by child sources,
675 * but we support older glib versions that do not have them.
676 */
677 IOWatchPoll *iwp = io_watch_poll_from_source(source);
678 assert(iwp->src == NULL);
679 }
680
681 static GSourceFuncs io_watch_poll_funcs = {
682 .prepare = io_watch_poll_prepare,
683 .check = io_watch_poll_check,
684 .dispatch = io_watch_poll_dispatch,
685 .finalize = io_watch_poll_finalize,
686 };
687
688 /* Can only be used for read */
689 static guint io_add_watch_poll(GIOChannel *channel,
690 IOCanReadHandler *fd_can_read,
691 GIOFunc fd_read,
692 gpointer user_data)
693 {
694 IOWatchPoll *iwp;
695 int tag;
696
697 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll));
698 iwp->fd_can_read = fd_can_read;
699 iwp->opaque = user_data;
700 iwp->channel = channel;
701 iwp->fd_read = (GSourceFunc) fd_read;
702 iwp->src = NULL;
703
704 tag = g_source_attach(&iwp->parent, NULL);
705 g_source_unref(&iwp->parent);
706 return tag;
707 }
708
709 static void io_remove_watch_poll(guint tag)
710 {
711 GSource *source;
712 IOWatchPoll *iwp;
713
714 g_return_if_fail (tag > 0);
715
716 source = g_main_context_find_source_by_id(NULL, tag);
717 g_return_if_fail (source != NULL);
718
719 iwp = io_watch_poll_from_source(source);
720 if (iwp->src) {
721 g_source_destroy(iwp->src);
722 g_source_unref(iwp->src);
723 iwp->src = NULL;
724 }
725 g_source_destroy(&iwp->parent);
726 }
727
728 #ifndef _WIN32
729 static GIOChannel *io_channel_from_fd(int fd)
730 {
731 GIOChannel *chan;
732
733 if (fd == -1) {
734 return NULL;
735 }
736
737 chan = g_io_channel_unix_new(fd);
738
739 g_io_channel_set_encoding(chan, NULL, NULL);
740 g_io_channel_set_buffered(chan, FALSE);
741
742 return chan;
743 }
744 #endif
745
746 static GIOChannel *io_channel_from_socket(int fd)
747 {
748 GIOChannel *chan;
749
750 if (fd == -1) {
751 return NULL;
752 }
753
754 #ifdef _WIN32
755 chan = g_io_channel_win32_new_socket(fd);
756 #else
757 chan = g_io_channel_unix_new(fd);
758 #endif
759
760 g_io_channel_set_encoding(chan, NULL, NULL);
761 g_io_channel_set_buffered(chan, FALSE);
762
763 return chan;
764 }
765
766 static int io_channel_send(GIOChannel *fd, const void *buf, size_t len)
767 {
768 size_t offset = 0;
769 GIOStatus status = G_IO_STATUS_NORMAL;
770
771 while (offset < len && status == G_IO_STATUS_NORMAL) {
772 gsize bytes_written = 0;
773
774 status = g_io_channel_write_chars(fd, buf + offset, len - offset,
775 &bytes_written, NULL);
776 offset += bytes_written;
777 }
778
779 if (offset > 0) {
780 return offset;
781 }
782 switch (status) {
783 case G_IO_STATUS_NORMAL:
784 g_assert(len == 0);
785 return 0;
786 case G_IO_STATUS_AGAIN:
787 errno = EAGAIN;
788 return -1;
789 default:
790 break;
791 }
792 errno = EINVAL;
793 return -1;
794 }
795
796 #ifndef _WIN32
797
798 typedef struct FDCharDriver {
799 CharDriverState *chr;
800 GIOChannel *fd_in, *fd_out;
801 guint fd_in_tag;
802 int max_size;
803 QTAILQ_ENTRY(FDCharDriver) node;
804 } FDCharDriver;
805
806 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
807 {
808 FDCharDriver *s = chr->opaque;
809
810 return io_channel_send(s->fd_out, buf, len);
811 }
812
813 static gboolean fd_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
814 {
815 CharDriverState *chr = opaque;
816 FDCharDriver *s = chr->opaque;
817 int len;
818 uint8_t buf[READ_BUF_LEN];
819 GIOStatus status;
820 gsize bytes_read;
821
822 len = sizeof(buf);
823 if (len > s->max_size) {
824 len = s->max_size;
825 }
826 if (len == 0) {
827 return TRUE;
828 }
829
830 status = g_io_channel_read_chars(chan, (gchar *)buf,
831 len, &bytes_read, NULL);
832 if (status == G_IO_STATUS_EOF) {
833 if (s->fd_in_tag) {
834 io_remove_watch_poll(s->fd_in_tag);
835 s->fd_in_tag = 0;
836 }
837 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
838 return FALSE;
839 }
840 if (status == G_IO_STATUS_NORMAL) {
841 qemu_chr_be_write(chr, buf, bytes_read);
842 }
843
844 return TRUE;
845 }
846
847 static int fd_chr_read_poll(void *opaque)
848 {
849 CharDriverState *chr = opaque;
850 FDCharDriver *s = chr->opaque;
851
852 s->max_size = qemu_chr_be_can_write(chr);
853 return s->max_size;
854 }
855
856 static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
857 {
858 FDCharDriver *s = chr->opaque;
859 return g_io_create_watch(s->fd_out, cond);
860 }
861
862 static void fd_chr_update_read_handler(CharDriverState *chr)
863 {
864 FDCharDriver *s = chr->opaque;
865
866 if (s->fd_in_tag) {
867 io_remove_watch_poll(s->fd_in_tag);
868 s->fd_in_tag = 0;
869 }
870
871 if (s->fd_in) {
872 s->fd_in_tag = io_add_watch_poll(s->fd_in, fd_chr_read_poll, fd_chr_read, chr);
873 }
874 }
875
876 static void fd_chr_close(struct CharDriverState *chr)
877 {
878 FDCharDriver *s = chr->opaque;
879
880 if (s->fd_in_tag) {
881 io_remove_watch_poll(s->fd_in_tag);
882 s->fd_in_tag = 0;
883 }
884
885 if (s->fd_in) {
886 g_io_channel_unref(s->fd_in);
887 }
888 if (s->fd_out) {
889 g_io_channel_unref(s->fd_out);
890 }
891
892 g_free(s);
893 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
894 }
895
896 /* open a character device to a unix fd */
897 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
898 {
899 CharDriverState *chr;
900 FDCharDriver *s;
901
902 chr = g_malloc0(sizeof(CharDriverState));
903 s = g_malloc0(sizeof(FDCharDriver));
904 s->fd_in = io_channel_from_fd(fd_in);
905 s->fd_out = io_channel_from_fd(fd_out);
906 fcntl(fd_out, F_SETFL, O_NONBLOCK);
907 s->chr = chr;
908 chr->opaque = s;
909 chr->chr_add_watch = fd_chr_add_watch;
910 chr->chr_write = fd_chr_write;
911 chr->chr_update_read_handler = fd_chr_update_read_handler;
912 chr->chr_close = fd_chr_close;
913
914 return chr;
915 }
916
917 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
918 {
919 int fd_in, fd_out;
920 char filename_in[256], filename_out[256];
921 const char *filename = opts->device;
922
923 if (filename == NULL) {
924 fprintf(stderr, "chardev: pipe: no filename given\n");
925 return NULL;
926 }
927
928 snprintf(filename_in, 256, "%s.in", filename);
929 snprintf(filename_out, 256, "%s.out", filename);
930 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
931 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
932 if (fd_in < 0 || fd_out < 0) {
933 if (fd_in >= 0)
934 close(fd_in);
935 if (fd_out >= 0)
936 close(fd_out);
937 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
938 if (fd_in < 0) {
939 return NULL;
940 }
941 }
942 return qemu_chr_open_fd(fd_in, fd_out);
943 }
944
945 /* init terminal so that we can grab keys */
946 static struct termios oldtty;
947 static int old_fd0_flags;
948 static bool stdio_allow_signal;
949
950 static void term_exit(void)
951 {
952 tcsetattr (0, TCSANOW, &oldtty);
953 fcntl(0, F_SETFL, old_fd0_flags);
954 }
955
956 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
957 {
958 struct termios tty;
959
960 tty = oldtty;
961 if (!echo) {
962 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
963 |INLCR|IGNCR|ICRNL|IXON);
964 tty.c_oflag |= OPOST;
965 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
966 tty.c_cflag &= ~(CSIZE|PARENB);
967 tty.c_cflag |= CS8;
968 tty.c_cc[VMIN] = 1;
969 tty.c_cc[VTIME] = 0;
970 }
971 if (!stdio_allow_signal)
972 tty.c_lflag &= ~ISIG;
973
974 tcsetattr (0, TCSANOW, &tty);
975 }
976
977 static void qemu_chr_close_stdio(struct CharDriverState *chr)
978 {
979 term_exit();
980 fd_chr_close(chr);
981 }
982
983 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
984 {
985 CharDriverState *chr;
986
987 if (is_daemonized()) {
988 error_report("cannot use stdio with -daemonize");
989 return NULL;
990 }
991 old_fd0_flags = fcntl(0, F_GETFL);
992 tcgetattr (0, &oldtty);
993 fcntl(0, F_SETFL, O_NONBLOCK);
994 atexit(term_exit);
995
996 chr = qemu_chr_open_fd(0, 1);
997 chr->chr_close = qemu_chr_close_stdio;
998 chr->chr_set_echo = qemu_chr_set_echo_stdio;
999 if (opts->has_signal) {
1000 stdio_allow_signal = opts->signal;
1001 }
1002 qemu_chr_fe_set_echo(chr, false);
1003
1004 return chr;
1005 }
1006
1007 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1008 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
1009 || defined(__GLIBC__)
1010
1011 #define HAVE_CHARDEV_TTY 1
1012
1013 typedef struct {
1014 GIOChannel *fd;
1015 guint fd_tag;
1016 int connected;
1017 int read_bytes;
1018 guint timer_tag;
1019 } PtyCharDriver;
1020
1021 static void pty_chr_update_read_handler(CharDriverState *chr);
1022 static void pty_chr_state(CharDriverState *chr, int connected);
1023
1024 static gboolean pty_chr_timer(gpointer opaque)
1025 {
1026 struct CharDriverState *chr = opaque;
1027 PtyCharDriver *s = chr->opaque;
1028
1029 s->timer_tag = 0;
1030 if (!s->connected) {
1031 /* Next poll ... */
1032 pty_chr_update_read_handler(chr);
1033 }
1034 return FALSE;
1035 }
1036
1037 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1038 {
1039 PtyCharDriver *s = chr->opaque;
1040
1041 if (s->timer_tag) {
1042 g_source_remove(s->timer_tag);
1043 s->timer_tag = 0;
1044 }
1045
1046 if (ms == 1000) {
1047 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1048 } else {
1049 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1050 }
1051 }
1052
1053 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1054 {
1055 PtyCharDriver *s = chr->opaque;
1056
1057 if (!s->connected) {
1058 /* guest sends data, check for (re-)connect */
1059 pty_chr_update_read_handler(chr);
1060 return 0;
1061 }
1062 return io_channel_send(s->fd, buf, len);
1063 }
1064
1065 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1066 {
1067 PtyCharDriver *s = chr->opaque;
1068 return g_io_create_watch(s->fd, cond);
1069 }
1070
1071 static int pty_chr_read_poll(void *opaque)
1072 {
1073 CharDriverState *chr = opaque;
1074 PtyCharDriver *s = chr->opaque;
1075
1076 s->read_bytes = qemu_chr_be_can_write(chr);
1077 return s->read_bytes;
1078 }
1079
1080 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1081 {
1082 CharDriverState *chr = opaque;
1083 PtyCharDriver *s = chr->opaque;
1084 gsize size, len;
1085 uint8_t buf[READ_BUF_LEN];
1086 GIOStatus status;
1087
1088 len = sizeof(buf);
1089 if (len > s->read_bytes)
1090 len = s->read_bytes;
1091 if (len == 0) {
1092 return TRUE;
1093 }
1094 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1095 if (status != G_IO_STATUS_NORMAL) {
1096 pty_chr_state(chr, 0);
1097 return FALSE;
1098 } else {
1099 pty_chr_state(chr, 1);
1100 qemu_chr_be_write(chr, buf, size);
1101 }
1102 return TRUE;
1103 }
1104
1105 static void pty_chr_update_read_handler(CharDriverState *chr)
1106 {
1107 PtyCharDriver *s = chr->opaque;
1108 GPollFD pfd;
1109
1110 pfd.fd = g_io_channel_unix_get_fd(s->fd);
1111 pfd.events = G_IO_OUT;
1112 pfd.revents = 0;
1113 g_poll(&pfd, 1, 0);
1114 if (pfd.revents & G_IO_HUP) {
1115 pty_chr_state(chr, 0);
1116 } else {
1117 pty_chr_state(chr, 1);
1118 }
1119 }
1120
1121 static void pty_chr_state(CharDriverState *chr, int connected)
1122 {
1123 PtyCharDriver *s = chr->opaque;
1124
1125 if (!connected) {
1126 if (s->fd_tag) {
1127 io_remove_watch_poll(s->fd_tag);
1128 s->fd_tag = 0;
1129 }
1130 s->connected = 0;
1131 /* (re-)connect poll interval for idle guests: once per second.
1132 * We check more frequently in case the guests sends data to
1133 * the virtual device linked to our pty. */
1134 pty_chr_rearm_timer(chr, 1000);
1135 } else {
1136 if (s->timer_tag) {
1137 g_source_remove(s->timer_tag);
1138 s->timer_tag = 0;
1139 }
1140 if (!s->connected) {
1141 s->connected = 1;
1142 qemu_chr_be_generic_open(chr);
1143 s->fd_tag = io_add_watch_poll(s->fd, pty_chr_read_poll, pty_chr_read, chr);
1144 }
1145 }
1146 }
1147
1148
1149 static void pty_chr_close(struct CharDriverState *chr)
1150 {
1151 PtyCharDriver *s = chr->opaque;
1152 int fd;
1153
1154 if (s->fd_tag) {
1155 io_remove_watch_poll(s->fd_tag);
1156 s->fd_tag = 0;
1157 }
1158 fd = g_io_channel_unix_get_fd(s->fd);
1159 g_io_channel_unref(s->fd);
1160 close(fd);
1161 if (s->timer_tag) {
1162 g_source_remove(s->timer_tag);
1163 s->timer_tag = 0;
1164 }
1165 g_free(s);
1166 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1167 }
1168
1169 static CharDriverState *qemu_chr_open_pty(const char *id,
1170 ChardevReturn *ret)
1171 {
1172 CharDriverState *chr;
1173 PtyCharDriver *s;
1174 int master_fd, slave_fd;
1175 char pty_name[PATH_MAX];
1176
1177 master_fd = qemu_openpty_raw(&slave_fd, pty_name);
1178 if (master_fd < 0) {
1179 return NULL;
1180 }
1181
1182 close(slave_fd);
1183
1184 chr = g_malloc0(sizeof(CharDriverState));
1185
1186 chr->filename = g_strdup_printf("pty:%s", pty_name);
1187 ret->pty = g_strdup(pty_name);
1188 ret->has_pty = true;
1189
1190 fprintf(stderr, "char device redirected to %s (label %s)\n",
1191 pty_name, id);
1192
1193 s = g_malloc0(sizeof(PtyCharDriver));
1194 chr->opaque = s;
1195 chr->chr_write = pty_chr_write;
1196 chr->chr_update_read_handler = pty_chr_update_read_handler;
1197 chr->chr_close = pty_chr_close;
1198 chr->chr_add_watch = pty_chr_add_watch;
1199 chr->explicit_be_open = true;
1200
1201 s->fd = io_channel_from_fd(master_fd);
1202 s->timer_tag = 0;
1203
1204 return chr;
1205 }
1206
1207 static void tty_serial_init(int fd, int speed,
1208 int parity, int data_bits, int stop_bits)
1209 {
1210 struct termios tty;
1211 speed_t spd;
1212
1213 #if 0
1214 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1215 speed, parity, data_bits, stop_bits);
1216 #endif
1217 tcgetattr (fd, &tty);
1218
1219 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1220 speed = speed * 10 / 11;
1221 do {
1222 check_speed(50);
1223 check_speed(75);
1224 check_speed(110);
1225 check_speed(134);
1226 check_speed(150);
1227 check_speed(200);
1228 check_speed(300);
1229 check_speed(600);
1230 check_speed(1200);
1231 check_speed(1800);
1232 check_speed(2400);
1233 check_speed(4800);
1234 check_speed(9600);
1235 check_speed(19200);
1236 check_speed(38400);
1237 /* Non-Posix values follow. They may be unsupported on some systems. */
1238 check_speed(57600);
1239 check_speed(115200);
1240 #ifdef B230400
1241 check_speed(230400);
1242 #endif
1243 #ifdef B460800
1244 check_speed(460800);
1245 #endif
1246 #ifdef B500000
1247 check_speed(500000);
1248 #endif
1249 #ifdef B576000
1250 check_speed(576000);
1251 #endif
1252 #ifdef B921600
1253 check_speed(921600);
1254 #endif
1255 #ifdef B1000000
1256 check_speed(1000000);
1257 #endif
1258 #ifdef B1152000
1259 check_speed(1152000);
1260 #endif
1261 #ifdef B1500000
1262 check_speed(1500000);
1263 #endif
1264 #ifdef B2000000
1265 check_speed(2000000);
1266 #endif
1267 #ifdef B2500000
1268 check_speed(2500000);
1269 #endif
1270 #ifdef B3000000
1271 check_speed(3000000);
1272 #endif
1273 #ifdef B3500000
1274 check_speed(3500000);
1275 #endif
1276 #ifdef B4000000
1277 check_speed(4000000);
1278 #endif
1279 spd = B115200;
1280 } while (0);
1281
1282 cfsetispeed(&tty, spd);
1283 cfsetospeed(&tty, spd);
1284
1285 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1286 |INLCR|IGNCR|ICRNL|IXON);
1287 tty.c_oflag |= OPOST;
1288 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1289 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1290 switch(data_bits) {
1291 default:
1292 case 8:
1293 tty.c_cflag |= CS8;
1294 break;
1295 case 7:
1296 tty.c_cflag |= CS7;
1297 break;
1298 case 6:
1299 tty.c_cflag |= CS6;
1300 break;
1301 case 5:
1302 tty.c_cflag |= CS5;
1303 break;
1304 }
1305 switch(parity) {
1306 default:
1307 case 'N':
1308 break;
1309 case 'E':
1310 tty.c_cflag |= PARENB;
1311 break;
1312 case 'O':
1313 tty.c_cflag |= PARENB | PARODD;
1314 break;
1315 }
1316 if (stop_bits == 2)
1317 tty.c_cflag |= CSTOPB;
1318
1319 tcsetattr (fd, TCSANOW, &tty);
1320 }
1321
1322 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1323 {
1324 FDCharDriver *s = chr->opaque;
1325
1326 switch(cmd) {
1327 case CHR_IOCTL_SERIAL_SET_PARAMS:
1328 {
1329 QEMUSerialSetParams *ssp = arg;
1330 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1331 ssp->speed, ssp->parity,
1332 ssp->data_bits, ssp->stop_bits);
1333 }
1334 break;
1335 case CHR_IOCTL_SERIAL_SET_BREAK:
1336 {
1337 int enable = *(int *)arg;
1338 if (enable) {
1339 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1340 }
1341 }
1342 break;
1343 case CHR_IOCTL_SERIAL_GET_TIOCM:
1344 {
1345 int sarg = 0;
1346 int *targ = (int *)arg;
1347 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1348 *targ = 0;
1349 if (sarg & TIOCM_CTS)
1350 *targ |= CHR_TIOCM_CTS;
1351 if (sarg & TIOCM_CAR)
1352 *targ |= CHR_TIOCM_CAR;
1353 if (sarg & TIOCM_DSR)
1354 *targ |= CHR_TIOCM_DSR;
1355 if (sarg & TIOCM_RI)
1356 *targ |= CHR_TIOCM_RI;
1357 if (sarg & TIOCM_DTR)
1358 *targ |= CHR_TIOCM_DTR;
1359 if (sarg & TIOCM_RTS)
1360 *targ |= CHR_TIOCM_RTS;
1361 }
1362 break;
1363 case CHR_IOCTL_SERIAL_SET_TIOCM:
1364 {
1365 int sarg = *(int *)arg;
1366 int targ = 0;
1367 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1368 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1369 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1370 if (sarg & CHR_TIOCM_CTS)
1371 targ |= TIOCM_CTS;
1372 if (sarg & CHR_TIOCM_CAR)
1373 targ |= TIOCM_CAR;
1374 if (sarg & CHR_TIOCM_DSR)
1375 targ |= TIOCM_DSR;
1376 if (sarg & CHR_TIOCM_RI)
1377 targ |= TIOCM_RI;
1378 if (sarg & CHR_TIOCM_DTR)
1379 targ |= TIOCM_DTR;
1380 if (sarg & CHR_TIOCM_RTS)
1381 targ |= TIOCM_RTS;
1382 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1383 }
1384 break;
1385 default:
1386 return -ENOTSUP;
1387 }
1388 return 0;
1389 }
1390
1391 static void qemu_chr_close_tty(CharDriverState *chr)
1392 {
1393 FDCharDriver *s = chr->opaque;
1394 int fd = -1;
1395
1396 if (s) {
1397 fd = g_io_channel_unix_get_fd(s->fd_in);
1398 }
1399
1400 fd_chr_close(chr);
1401
1402 if (fd >= 0) {
1403 close(fd);
1404 }
1405 }
1406
1407 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1408 {
1409 CharDriverState *chr;
1410
1411 tty_serial_init(fd, 115200, 'N', 8, 1);
1412 chr = qemu_chr_open_fd(fd, fd);
1413 chr->chr_ioctl = tty_serial_ioctl;
1414 chr->chr_close = qemu_chr_close_tty;
1415 return chr;
1416 }
1417 #endif /* __linux__ || __sun__ */
1418
1419 #if defined(__linux__)
1420
1421 #define HAVE_CHARDEV_PARPORT 1
1422
1423 typedef struct {
1424 int fd;
1425 int mode;
1426 } ParallelCharDriver;
1427
1428 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1429 {
1430 if (s->mode != mode) {
1431 int m = mode;
1432 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1433 return 0;
1434 s->mode = mode;
1435 }
1436 return 1;
1437 }
1438
1439 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1440 {
1441 ParallelCharDriver *drv = chr->opaque;
1442 int fd = drv->fd;
1443 uint8_t b;
1444
1445 switch(cmd) {
1446 case CHR_IOCTL_PP_READ_DATA:
1447 if (ioctl(fd, PPRDATA, &b) < 0)
1448 return -ENOTSUP;
1449 *(uint8_t *)arg = b;
1450 break;
1451 case CHR_IOCTL_PP_WRITE_DATA:
1452 b = *(uint8_t *)arg;
1453 if (ioctl(fd, PPWDATA, &b) < 0)
1454 return -ENOTSUP;
1455 break;
1456 case CHR_IOCTL_PP_READ_CONTROL:
1457 if (ioctl(fd, PPRCONTROL, &b) < 0)
1458 return -ENOTSUP;
1459 /* Linux gives only the lowest bits, and no way to know data
1460 direction! For better compatibility set the fixed upper
1461 bits. */
1462 *(uint8_t *)arg = b | 0xc0;
1463 break;
1464 case CHR_IOCTL_PP_WRITE_CONTROL:
1465 b = *(uint8_t *)arg;
1466 if (ioctl(fd, PPWCONTROL, &b) < 0)
1467 return -ENOTSUP;
1468 break;
1469 case CHR_IOCTL_PP_READ_STATUS:
1470 if (ioctl(fd, PPRSTATUS, &b) < 0)
1471 return -ENOTSUP;
1472 *(uint8_t *)arg = b;
1473 break;
1474 case CHR_IOCTL_PP_DATA_DIR:
1475 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1476 return -ENOTSUP;
1477 break;
1478 case CHR_IOCTL_PP_EPP_READ_ADDR:
1479 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1480 struct ParallelIOArg *parg = arg;
1481 int n = read(fd, parg->buffer, parg->count);
1482 if (n != parg->count) {
1483 return -EIO;
1484 }
1485 }
1486 break;
1487 case CHR_IOCTL_PP_EPP_READ:
1488 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1489 struct ParallelIOArg *parg = arg;
1490 int n = read(fd, parg->buffer, parg->count);
1491 if (n != parg->count) {
1492 return -EIO;
1493 }
1494 }
1495 break;
1496 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1497 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1498 struct ParallelIOArg *parg = arg;
1499 int n = write(fd, parg->buffer, parg->count);
1500 if (n != parg->count) {
1501 return -EIO;
1502 }
1503 }
1504 break;
1505 case CHR_IOCTL_PP_EPP_WRITE:
1506 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1507 struct ParallelIOArg *parg = arg;
1508 int n = write(fd, parg->buffer, parg->count);
1509 if (n != parg->count) {
1510 return -EIO;
1511 }
1512 }
1513 break;
1514 default:
1515 return -ENOTSUP;
1516 }
1517 return 0;
1518 }
1519
1520 static void pp_close(CharDriverState *chr)
1521 {
1522 ParallelCharDriver *drv = chr->opaque;
1523 int fd = drv->fd;
1524
1525 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1526 ioctl(fd, PPRELEASE);
1527 close(fd);
1528 g_free(drv);
1529 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1530 }
1531
1532 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1533 {
1534 CharDriverState *chr;
1535 ParallelCharDriver *drv;
1536
1537 if (ioctl(fd, PPCLAIM) < 0) {
1538 close(fd);
1539 return NULL;
1540 }
1541
1542 drv = g_malloc0(sizeof(ParallelCharDriver));
1543 drv->fd = fd;
1544 drv->mode = IEEE1284_MODE_COMPAT;
1545
1546 chr = g_malloc0(sizeof(CharDriverState));
1547 chr->chr_write = null_chr_write;
1548 chr->chr_ioctl = pp_ioctl;
1549 chr->chr_close = pp_close;
1550 chr->opaque = drv;
1551
1552 return chr;
1553 }
1554 #endif /* __linux__ */
1555
1556 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1557
1558 #define HAVE_CHARDEV_PARPORT 1
1559
1560 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1561 {
1562 int fd = (int)(intptr_t)chr->opaque;
1563 uint8_t b;
1564
1565 switch(cmd) {
1566 case CHR_IOCTL_PP_READ_DATA:
1567 if (ioctl(fd, PPIGDATA, &b) < 0)
1568 return -ENOTSUP;
1569 *(uint8_t *)arg = b;
1570 break;
1571 case CHR_IOCTL_PP_WRITE_DATA:
1572 b = *(uint8_t *)arg;
1573 if (ioctl(fd, PPISDATA, &b) < 0)
1574 return -ENOTSUP;
1575 break;
1576 case CHR_IOCTL_PP_READ_CONTROL:
1577 if (ioctl(fd, PPIGCTRL, &b) < 0)
1578 return -ENOTSUP;
1579 *(uint8_t *)arg = b;
1580 break;
1581 case CHR_IOCTL_PP_WRITE_CONTROL:
1582 b = *(uint8_t *)arg;
1583 if (ioctl(fd, PPISCTRL, &b) < 0)
1584 return -ENOTSUP;
1585 break;
1586 case CHR_IOCTL_PP_READ_STATUS:
1587 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1588 return -ENOTSUP;
1589 *(uint8_t *)arg = b;
1590 break;
1591 default:
1592 return -ENOTSUP;
1593 }
1594 return 0;
1595 }
1596
1597 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1598 {
1599 CharDriverState *chr;
1600
1601 chr = g_malloc0(sizeof(CharDriverState));
1602 chr->opaque = (void *)(intptr_t)fd;
1603 chr->chr_write = null_chr_write;
1604 chr->chr_ioctl = pp_ioctl;
1605 chr->explicit_be_open = true;
1606 return chr;
1607 }
1608 #endif
1609
1610 #else /* _WIN32 */
1611
1612 typedef struct {
1613 int max_size;
1614 HANDLE hcom, hrecv, hsend;
1615 OVERLAPPED orecv, osend;
1616 BOOL fpipe;
1617 DWORD len;
1618 } WinCharState;
1619
1620 typedef struct {
1621 HANDLE hStdIn;
1622 HANDLE hInputReadyEvent;
1623 HANDLE hInputDoneEvent;
1624 HANDLE hInputThread;
1625 uint8_t win_stdio_buf;
1626 } WinStdioCharState;
1627
1628 #define NSENDBUF 2048
1629 #define NRECVBUF 2048
1630 #define MAXCONNECT 1
1631 #define NTIMEOUT 5000
1632
1633 static int win_chr_poll(void *opaque);
1634 static int win_chr_pipe_poll(void *opaque);
1635
1636 static void win_chr_close(CharDriverState *chr)
1637 {
1638 WinCharState *s = chr->opaque;
1639
1640 if (s->hsend) {
1641 CloseHandle(s->hsend);
1642 s->hsend = NULL;
1643 }
1644 if (s->hrecv) {
1645 CloseHandle(s->hrecv);
1646 s->hrecv = NULL;
1647 }
1648 if (s->hcom) {
1649 CloseHandle(s->hcom);
1650 s->hcom = NULL;
1651 }
1652 if (s->fpipe)
1653 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1654 else
1655 qemu_del_polling_cb(win_chr_poll, chr);
1656
1657 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1658 }
1659
1660 static int win_chr_init(CharDriverState *chr, const char *filename)
1661 {
1662 WinCharState *s = chr->opaque;
1663 COMMCONFIG comcfg;
1664 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1665 COMSTAT comstat;
1666 DWORD size;
1667 DWORD err;
1668
1669 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1670 if (!s->hsend) {
1671 fprintf(stderr, "Failed CreateEvent\n");
1672 goto fail;
1673 }
1674 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1675 if (!s->hrecv) {
1676 fprintf(stderr, "Failed CreateEvent\n");
1677 goto fail;
1678 }
1679
1680 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1681 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1682 if (s->hcom == INVALID_HANDLE_VALUE) {
1683 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1684 s->hcom = NULL;
1685 goto fail;
1686 }
1687
1688 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1689 fprintf(stderr, "Failed SetupComm\n");
1690 goto fail;
1691 }
1692
1693 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1694 size = sizeof(COMMCONFIG);
1695 GetDefaultCommConfig(filename, &comcfg, &size);
1696 comcfg.dcb.DCBlength = sizeof(DCB);
1697 CommConfigDialog(filename, NULL, &comcfg);
1698
1699 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1700 fprintf(stderr, "Failed SetCommState\n");
1701 goto fail;
1702 }
1703
1704 if (!SetCommMask(s->hcom, EV_ERR)) {
1705 fprintf(stderr, "Failed SetCommMask\n");
1706 goto fail;
1707 }
1708
1709 cto.ReadIntervalTimeout = MAXDWORD;
1710 if (!SetCommTimeouts(s->hcom, &cto)) {
1711 fprintf(stderr, "Failed SetCommTimeouts\n");
1712 goto fail;
1713 }
1714
1715 if (!ClearCommError(s->hcom, &err, &comstat)) {
1716 fprintf(stderr, "Failed ClearCommError\n");
1717 goto fail;
1718 }
1719 qemu_add_polling_cb(win_chr_poll, chr);
1720 return 0;
1721
1722 fail:
1723 win_chr_close(chr);
1724 return -1;
1725 }
1726
1727 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1728 {
1729 WinCharState *s = chr->opaque;
1730 DWORD len, ret, size, err;
1731
1732 len = len1;
1733 ZeroMemory(&s->osend, sizeof(s->osend));
1734 s->osend.hEvent = s->hsend;
1735 while (len > 0) {
1736 if (s->hsend)
1737 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1738 else
1739 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1740 if (!ret) {
1741 err = GetLastError();
1742 if (err == ERROR_IO_PENDING) {
1743 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1744 if (ret) {
1745 buf += size;
1746 len -= size;
1747 } else {
1748 break;
1749 }
1750 } else {
1751 break;
1752 }
1753 } else {
1754 buf += size;
1755 len -= size;
1756 }
1757 }
1758 return len1 - len;
1759 }
1760
1761 static int win_chr_read_poll(CharDriverState *chr)
1762 {
1763 WinCharState *s = chr->opaque;
1764
1765 s->max_size = qemu_chr_be_can_write(chr);
1766 return s->max_size;
1767 }
1768
1769 static void win_chr_readfile(CharDriverState *chr)
1770 {
1771 WinCharState *s = chr->opaque;
1772 int ret, err;
1773 uint8_t buf[READ_BUF_LEN];
1774 DWORD size;
1775
1776 ZeroMemory(&s->orecv, sizeof(s->orecv));
1777 s->orecv.hEvent = s->hrecv;
1778 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1779 if (!ret) {
1780 err = GetLastError();
1781 if (err == ERROR_IO_PENDING) {
1782 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1783 }
1784 }
1785
1786 if (size > 0) {
1787 qemu_chr_be_write(chr, buf, size);
1788 }
1789 }
1790
1791 static void win_chr_read(CharDriverState *chr)
1792 {
1793 WinCharState *s = chr->opaque;
1794
1795 if (s->len > s->max_size)
1796 s->len = s->max_size;
1797 if (s->len == 0)
1798 return;
1799
1800 win_chr_readfile(chr);
1801 }
1802
1803 static int win_chr_poll(void *opaque)
1804 {
1805 CharDriverState *chr = opaque;
1806 WinCharState *s = chr->opaque;
1807 COMSTAT status;
1808 DWORD comerr;
1809
1810 ClearCommError(s->hcom, &comerr, &status);
1811 if (status.cbInQue > 0) {
1812 s->len = status.cbInQue;
1813 win_chr_read_poll(chr);
1814 win_chr_read(chr);
1815 return 1;
1816 }
1817 return 0;
1818 }
1819
1820 static CharDriverState *qemu_chr_open_win_path(const char *filename)
1821 {
1822 CharDriverState *chr;
1823 WinCharState *s;
1824
1825 chr = g_malloc0(sizeof(CharDriverState));
1826 s = g_malloc0(sizeof(WinCharState));
1827 chr->opaque = s;
1828 chr->chr_write = win_chr_write;
1829 chr->chr_close = win_chr_close;
1830
1831 if (win_chr_init(chr, filename) < 0) {
1832 g_free(s);
1833 g_free(chr);
1834 return NULL;
1835 }
1836 return chr;
1837 }
1838
1839 static int win_chr_pipe_poll(void *opaque)
1840 {
1841 CharDriverState *chr = opaque;
1842 WinCharState *s = chr->opaque;
1843 DWORD size;
1844
1845 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1846 if (size > 0) {
1847 s->len = size;
1848 win_chr_read_poll(chr);
1849 win_chr_read(chr);
1850 return 1;
1851 }
1852 return 0;
1853 }
1854
1855 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1856 {
1857 WinCharState *s = chr->opaque;
1858 OVERLAPPED ov;
1859 int ret;
1860 DWORD size;
1861 char openname[256];
1862
1863 s->fpipe = TRUE;
1864
1865 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1866 if (!s->hsend) {
1867 fprintf(stderr, "Failed CreateEvent\n");
1868 goto fail;
1869 }
1870 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1871 if (!s->hrecv) {
1872 fprintf(stderr, "Failed CreateEvent\n");
1873 goto fail;
1874 }
1875
1876 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1877 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1878 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1879 PIPE_WAIT,
1880 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1881 if (s->hcom == INVALID_HANDLE_VALUE) {
1882 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1883 s->hcom = NULL;
1884 goto fail;
1885 }
1886
1887 ZeroMemory(&ov, sizeof(ov));
1888 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1889 ret = ConnectNamedPipe(s->hcom, &ov);
1890 if (ret) {
1891 fprintf(stderr, "Failed ConnectNamedPipe\n");
1892 goto fail;
1893 }
1894
1895 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1896 if (!ret) {
1897 fprintf(stderr, "Failed GetOverlappedResult\n");
1898 if (ov.hEvent) {
1899 CloseHandle(ov.hEvent);
1900 ov.hEvent = NULL;
1901 }
1902 goto fail;
1903 }
1904
1905 if (ov.hEvent) {
1906 CloseHandle(ov.hEvent);
1907 ov.hEvent = NULL;
1908 }
1909 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1910 return 0;
1911
1912 fail:
1913 win_chr_close(chr);
1914 return -1;
1915 }
1916
1917
1918 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
1919 {
1920 const char *filename = opts->device;
1921 CharDriverState *chr;
1922 WinCharState *s;
1923
1924 chr = g_malloc0(sizeof(CharDriverState));
1925 s = g_malloc0(sizeof(WinCharState));
1926 chr->opaque = s;
1927 chr->chr_write = win_chr_write;
1928 chr->chr_close = win_chr_close;
1929
1930 if (win_chr_pipe_init(chr, filename) < 0) {
1931 g_free(s);
1932 g_free(chr);
1933 return NULL;
1934 }
1935 return chr;
1936 }
1937
1938 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1939 {
1940 CharDriverState *chr;
1941 WinCharState *s;
1942
1943 chr = g_malloc0(sizeof(CharDriverState));
1944 s = g_malloc0(sizeof(WinCharState));
1945 s->hcom = fd_out;
1946 chr->opaque = s;
1947 chr->chr_write = win_chr_write;
1948 return chr;
1949 }
1950
1951 static CharDriverState *qemu_chr_open_win_con(void)
1952 {
1953 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1954 }
1955
1956 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1957 {
1958 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1959 DWORD dwSize;
1960 int len1;
1961
1962 len1 = len;
1963
1964 while (len1 > 0) {
1965 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1966 break;
1967 }
1968 buf += dwSize;
1969 len1 -= dwSize;
1970 }
1971
1972 return len - len1;
1973 }
1974
1975 static void win_stdio_wait_func(void *opaque)
1976 {
1977 CharDriverState *chr = opaque;
1978 WinStdioCharState *stdio = chr->opaque;
1979 INPUT_RECORD buf[4];
1980 int ret;
1981 DWORD dwSize;
1982 int i;
1983
1984 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
1985 &dwSize);
1986
1987 if (!ret) {
1988 /* Avoid error storm */
1989 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
1990 return;
1991 }
1992
1993 for (i = 0; i < dwSize; i++) {
1994 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
1995
1996 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
1997 int j;
1998 if (kev->uChar.AsciiChar != 0) {
1999 for (j = 0; j < kev->wRepeatCount; j++) {
2000 if (qemu_chr_be_can_write(chr)) {
2001 uint8_t c = kev->uChar.AsciiChar;
2002 qemu_chr_be_write(chr, &c, 1);
2003 }
2004 }
2005 }
2006 }
2007 }
2008 }
2009
2010 static DWORD WINAPI win_stdio_thread(LPVOID param)
2011 {
2012 CharDriverState *chr = param;
2013 WinStdioCharState *stdio = chr->opaque;
2014 int ret;
2015 DWORD dwSize;
2016
2017 while (1) {
2018
2019 /* Wait for one byte */
2020 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2021
2022 /* Exit in case of error, continue if nothing read */
2023 if (!ret) {
2024 break;
2025 }
2026 if (!dwSize) {
2027 continue;
2028 }
2029
2030 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2031 if (stdio->win_stdio_buf == '\r') {
2032 continue;
2033 }
2034
2035 /* Signal the main thread and wait until the byte was eaten */
2036 if (!SetEvent(stdio->hInputReadyEvent)) {
2037 break;
2038 }
2039 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2040 != WAIT_OBJECT_0) {
2041 break;
2042 }
2043 }
2044
2045 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2046 return 0;
2047 }
2048
2049 static void win_stdio_thread_wait_func(void *opaque)
2050 {
2051 CharDriverState *chr = opaque;
2052 WinStdioCharState *stdio = chr->opaque;
2053
2054 if (qemu_chr_be_can_write(chr)) {
2055 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2056 }
2057
2058 SetEvent(stdio->hInputDoneEvent);
2059 }
2060
2061 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2062 {
2063 WinStdioCharState *stdio = chr->opaque;
2064 DWORD dwMode = 0;
2065
2066 GetConsoleMode(stdio->hStdIn, &dwMode);
2067
2068 if (echo) {
2069 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2070 } else {
2071 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2072 }
2073 }
2074
2075 static void win_stdio_close(CharDriverState *chr)
2076 {
2077 WinStdioCharState *stdio = chr->opaque;
2078
2079 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2080 CloseHandle(stdio->hInputReadyEvent);
2081 }
2082 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2083 CloseHandle(stdio->hInputDoneEvent);
2084 }
2085 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2086 TerminateThread(stdio->hInputThread, 0);
2087 }
2088
2089 g_free(chr->opaque);
2090 g_free(chr);
2091 }
2092
2093 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
2094 {
2095 CharDriverState *chr;
2096 WinStdioCharState *stdio;
2097 DWORD dwMode;
2098 int is_console = 0;
2099
2100 chr = g_malloc0(sizeof(CharDriverState));
2101 stdio = g_malloc0(sizeof(WinStdioCharState));
2102
2103 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2104 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2105 fprintf(stderr, "cannot open stdio: invalid handle\n");
2106 exit(1);
2107 }
2108
2109 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2110
2111 chr->opaque = stdio;
2112 chr->chr_write = win_stdio_write;
2113 chr->chr_close = win_stdio_close;
2114
2115 if (is_console) {
2116 if (qemu_add_wait_object(stdio->hStdIn,
2117 win_stdio_wait_func, chr)) {
2118 fprintf(stderr, "qemu_add_wait_object: failed\n");
2119 }
2120 } else {
2121 DWORD dwId;
2122
2123 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2124 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2125 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2126 chr, 0, &dwId);
2127
2128 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2129 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2130 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2131 fprintf(stderr, "cannot create stdio thread or event\n");
2132 exit(1);
2133 }
2134 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2135 win_stdio_thread_wait_func, chr)) {
2136 fprintf(stderr, "qemu_add_wait_object: failed\n");
2137 }
2138 }
2139
2140 dwMode |= ENABLE_LINE_INPUT;
2141
2142 if (is_console) {
2143 /* set the terminal in raw mode */
2144 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2145 dwMode |= ENABLE_PROCESSED_INPUT;
2146 }
2147
2148 SetConsoleMode(stdio->hStdIn, dwMode);
2149
2150 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2151 qemu_chr_fe_set_echo(chr, false);
2152
2153 return chr;
2154 }
2155 #endif /* !_WIN32 */
2156
2157
2158 /***********************************************************/
2159 /* UDP Net console */
2160
2161 typedef struct {
2162 int fd;
2163 GIOChannel *chan;
2164 guint tag;
2165 uint8_t buf[READ_BUF_LEN];
2166 int bufcnt;
2167 int bufptr;
2168 int max_size;
2169 } NetCharDriver;
2170
2171 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2172 {
2173 NetCharDriver *s = chr->opaque;
2174 gsize bytes_written;
2175 GIOStatus status;
2176
2177 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2178 if (status == G_IO_STATUS_EOF) {
2179 return 0;
2180 } else if (status != G_IO_STATUS_NORMAL) {
2181 return -1;
2182 }
2183
2184 return bytes_written;
2185 }
2186
2187 static int udp_chr_read_poll(void *opaque)
2188 {
2189 CharDriverState *chr = opaque;
2190 NetCharDriver *s = chr->opaque;
2191
2192 s->max_size = qemu_chr_be_can_write(chr);
2193
2194 /* If there were any stray characters in the queue process them
2195 * first
2196 */
2197 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2198 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2199 s->bufptr++;
2200 s->max_size = qemu_chr_be_can_write(chr);
2201 }
2202 return s->max_size;
2203 }
2204
2205 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2206 {
2207 CharDriverState *chr = opaque;
2208 NetCharDriver *s = chr->opaque;
2209 gsize bytes_read = 0;
2210 GIOStatus status;
2211
2212 if (s->max_size == 0) {
2213 return TRUE;
2214 }
2215 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2216 &bytes_read, NULL);
2217 s->bufcnt = bytes_read;
2218 s->bufptr = s->bufcnt;
2219 if (status != G_IO_STATUS_NORMAL) {
2220 if (s->tag) {
2221 io_remove_watch_poll(s->tag);
2222 s->tag = 0;
2223 }
2224 return FALSE;
2225 }
2226
2227 s->bufptr = 0;
2228 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2229 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2230 s->bufptr++;
2231 s->max_size = qemu_chr_be_can_write(chr);
2232 }
2233
2234 return TRUE;
2235 }
2236
2237 static void udp_chr_update_read_handler(CharDriverState *chr)
2238 {
2239 NetCharDriver *s = chr->opaque;
2240
2241 if (s->tag) {
2242 io_remove_watch_poll(s->tag);
2243 s->tag = 0;
2244 }
2245
2246 if (s->chan) {
2247 s->tag = io_add_watch_poll(s->chan, udp_chr_read_poll, udp_chr_read, chr);
2248 }
2249 }
2250
2251 static void udp_chr_close(CharDriverState *chr)
2252 {
2253 NetCharDriver *s = chr->opaque;
2254 if (s->tag) {
2255 io_remove_watch_poll(s->tag);
2256 s->tag = 0;
2257 }
2258 if (s->chan) {
2259 g_io_channel_unref(s->chan);
2260 closesocket(s->fd);
2261 }
2262 g_free(s);
2263 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2264 }
2265
2266 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2267 {
2268 CharDriverState *chr = NULL;
2269 NetCharDriver *s = NULL;
2270
2271 chr = g_malloc0(sizeof(CharDriverState));
2272 s = g_malloc0(sizeof(NetCharDriver));
2273
2274 s->fd = fd;
2275 s->chan = io_channel_from_socket(s->fd);
2276 s->bufcnt = 0;
2277 s->bufptr = 0;
2278 chr->opaque = s;
2279 chr->chr_write = udp_chr_write;
2280 chr->chr_update_read_handler = udp_chr_update_read_handler;
2281 chr->chr_close = udp_chr_close;
2282 /* be isn't opened until we get a connection */
2283 chr->explicit_be_open = true;
2284 return chr;
2285 }
2286
2287 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2288 {
2289 Error *local_err = NULL;
2290 int fd = -1;
2291
2292 fd = inet_dgram_opts(opts, &local_err);
2293 if (fd < 0) {
2294 qerror_report_err(local_err);
2295 error_free(local_err);
2296 return NULL;
2297 }
2298 return qemu_chr_open_udp_fd(fd);
2299 }
2300
2301 /***********************************************************/
2302 /* TCP Net console */
2303
2304 typedef struct {
2305
2306 GIOChannel *chan, *listen_chan;
2307 guint tag, listen_tag;
2308 int fd, listen_fd;
2309 int connected;
2310 int max_size;
2311 int do_telnetopt;
2312 int do_nodelay;
2313 int is_unix;
2314 int msgfd;
2315 } TCPCharDriver;
2316
2317 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2318
2319 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2320 {
2321 TCPCharDriver *s = chr->opaque;
2322 if (s->connected) {
2323 return io_channel_send(s->chan, buf, len);
2324 } else {
2325 /* XXX: indicate an error ? */
2326 return len;
2327 }
2328 }
2329
2330 static int tcp_chr_read_poll(void *opaque)
2331 {
2332 CharDriverState *chr = opaque;
2333 TCPCharDriver *s = chr->opaque;
2334 if (!s->connected)
2335 return 0;
2336 s->max_size = qemu_chr_be_can_write(chr);
2337 return s->max_size;
2338 }
2339
2340 #define IAC 255
2341 #define IAC_BREAK 243
2342 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2343 TCPCharDriver *s,
2344 uint8_t *buf, int *size)
2345 {
2346 /* Handle any telnet client's basic IAC options to satisfy char by
2347 * char mode with no echo. All IAC options will be removed from
2348 * the buf and the do_telnetopt variable will be used to track the
2349 * state of the width of the IAC information.
2350 *
2351 * IAC commands come in sets of 3 bytes with the exception of the
2352 * "IAC BREAK" command and the double IAC.
2353 */
2354
2355 int i;
2356 int j = 0;
2357
2358 for (i = 0; i < *size; i++) {
2359 if (s->do_telnetopt > 1) {
2360 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2361 /* Double IAC means send an IAC */
2362 if (j != i)
2363 buf[j] = buf[i];
2364 j++;
2365 s->do_telnetopt = 1;
2366 } else {
2367 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2368 /* Handle IAC break commands by sending a serial break */
2369 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2370 s->do_telnetopt++;
2371 }
2372 s->do_telnetopt++;
2373 }
2374 if (s->do_telnetopt >= 4) {
2375 s->do_telnetopt = 1;
2376 }
2377 } else {
2378 if ((unsigned char)buf[i] == IAC) {
2379 s->do_telnetopt = 2;
2380 } else {
2381 if (j != i)
2382 buf[j] = buf[i];
2383 j++;
2384 }
2385 }
2386 }
2387 *size = j;
2388 }
2389
2390 static int tcp_get_msgfd(CharDriverState *chr)
2391 {
2392 TCPCharDriver *s = chr->opaque;
2393 int fd = s->msgfd;
2394 s->msgfd = -1;
2395 return fd;
2396 }
2397
2398 #ifndef _WIN32
2399 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2400 {
2401 TCPCharDriver *s = chr->opaque;
2402 struct cmsghdr *cmsg;
2403
2404 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2405 int fd;
2406
2407 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2408 cmsg->cmsg_level != SOL_SOCKET ||
2409 cmsg->cmsg_type != SCM_RIGHTS)
2410 continue;
2411
2412 fd = *((int *)CMSG_DATA(cmsg));
2413 if (fd < 0)
2414 continue;
2415
2416 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2417 qemu_set_block(fd);
2418
2419 #ifndef MSG_CMSG_CLOEXEC
2420 qemu_set_cloexec(fd);
2421 #endif
2422 if (s->msgfd != -1)
2423 close(s->msgfd);
2424 s->msgfd = fd;
2425 }
2426 }
2427
2428 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2429 {
2430 TCPCharDriver *s = chr->opaque;
2431 struct msghdr msg = { NULL, };
2432 struct iovec iov[1];
2433 union {
2434 struct cmsghdr cmsg;
2435 char control[CMSG_SPACE(sizeof(int))];
2436 } msg_control;
2437 int flags = 0;
2438 ssize_t ret;
2439
2440 iov[0].iov_base = buf;
2441 iov[0].iov_len = len;
2442
2443 msg.msg_iov = iov;
2444 msg.msg_iovlen = 1;
2445 msg.msg_control = &msg_control;
2446 msg.msg_controllen = sizeof(msg_control);
2447
2448 #ifdef MSG_CMSG_CLOEXEC
2449 flags |= MSG_CMSG_CLOEXEC;
2450 #endif
2451 ret = recvmsg(s->fd, &msg, flags);
2452 if (ret > 0 && s->is_unix) {
2453 unix_process_msgfd(chr, &msg);
2454 }
2455
2456 return ret;
2457 }
2458 #else
2459 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2460 {
2461 TCPCharDriver *s = chr->opaque;
2462 return qemu_recv(s->fd, buf, len, 0);
2463 }
2464 #endif
2465
2466 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2467 {
2468 TCPCharDriver *s = chr->opaque;
2469 return g_io_create_watch(s->chan, cond);
2470 }
2471
2472 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2473 {
2474 CharDriverState *chr = opaque;
2475 TCPCharDriver *s = chr->opaque;
2476 uint8_t buf[READ_BUF_LEN];
2477 int len, size;
2478
2479 if (!s->connected || s->max_size <= 0) {
2480 return TRUE;
2481 }
2482 len = sizeof(buf);
2483 if (len > s->max_size)
2484 len = s->max_size;
2485 size = tcp_chr_recv(chr, (void *)buf, len);
2486 if (size == 0) {
2487 /* connection closed */
2488 s->connected = 0;
2489 if (s->listen_chan) {
2490 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2491 }
2492 if (s->tag) {
2493 io_remove_watch_poll(s->tag);
2494 s->tag = 0;
2495 }
2496 g_io_channel_unref(s->chan);
2497 s->chan = NULL;
2498 closesocket(s->fd);
2499 s->fd = -1;
2500 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2501 } else if (size > 0) {
2502 if (s->do_telnetopt)
2503 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2504 if (size > 0)
2505 qemu_chr_be_write(chr, buf, size);
2506 }
2507
2508 return TRUE;
2509 }
2510
2511 #ifndef _WIN32
2512 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2513 {
2514 return qemu_chr_open_fd(eventfd, eventfd);
2515 }
2516 #endif
2517
2518 static void tcp_chr_connect(void *opaque)
2519 {
2520 CharDriverState *chr = opaque;
2521 TCPCharDriver *s = chr->opaque;
2522
2523 s->connected = 1;
2524 if (s->chan) {
2525 s->tag = io_add_watch_poll(s->chan, tcp_chr_read_poll, tcp_chr_read, chr);
2526 }
2527 qemu_chr_be_generic_open(chr);
2528 }
2529
2530 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2531 static void tcp_chr_telnet_init(int fd)
2532 {
2533 char buf[3];
2534 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2535 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2536 send(fd, (char *)buf, 3, 0);
2537 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2538 send(fd, (char *)buf, 3, 0);
2539 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2540 send(fd, (char *)buf, 3, 0);
2541 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2542 send(fd, (char *)buf, 3, 0);
2543 }
2544
2545 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2546 {
2547 TCPCharDriver *s = chr->opaque;
2548 if (s->fd != -1)
2549 return -1;
2550
2551 qemu_set_nonblock(fd);
2552 if (s->do_nodelay)
2553 socket_set_nodelay(fd);
2554 s->fd = fd;
2555 s->chan = io_channel_from_socket(fd);
2556 if (s->listen_tag) {
2557 g_source_remove(s->listen_tag);
2558 s->listen_tag = 0;
2559 }
2560 tcp_chr_connect(chr);
2561
2562 return 0;
2563 }
2564
2565 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
2566 {
2567 CharDriverState *chr = opaque;
2568 TCPCharDriver *s = chr->opaque;
2569 struct sockaddr_in saddr;
2570 #ifndef _WIN32
2571 struct sockaddr_un uaddr;
2572 #endif
2573 struct sockaddr *addr;
2574 socklen_t len;
2575 int fd;
2576
2577 for(;;) {
2578 #ifndef _WIN32
2579 if (s->is_unix) {
2580 len = sizeof(uaddr);
2581 addr = (struct sockaddr *)&uaddr;
2582 } else
2583 #endif
2584 {
2585 len = sizeof(saddr);
2586 addr = (struct sockaddr *)&saddr;
2587 }
2588 fd = qemu_accept(s->listen_fd, addr, &len);
2589 if (fd < 0 && errno != EINTR) {
2590 s->listen_tag = 0;
2591 return FALSE;
2592 } else if (fd >= 0) {
2593 if (s->do_telnetopt)
2594 tcp_chr_telnet_init(fd);
2595 break;
2596 }
2597 }
2598 if (tcp_chr_add_client(chr, fd) < 0)
2599 close(fd);
2600
2601 return TRUE;
2602 }
2603
2604 static void tcp_chr_close(CharDriverState *chr)
2605 {
2606 TCPCharDriver *s = chr->opaque;
2607 if (s->fd >= 0) {
2608 if (s->tag) {
2609 io_remove_watch_poll(s->tag);
2610 s->tag = 0;
2611 }
2612 if (s->chan) {
2613 g_io_channel_unref(s->chan);
2614 }
2615 closesocket(s->fd);
2616 }
2617 if (s->listen_fd >= 0) {
2618 if (s->listen_tag) {
2619 g_source_remove(s->listen_tag);
2620 s->listen_tag = 0;
2621 }
2622 if (s->listen_chan) {
2623 g_io_channel_unref(s->listen_chan);
2624 }
2625 closesocket(s->listen_fd);
2626 }
2627 g_free(s);
2628 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2629 }
2630
2631 static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
2632 bool is_listen, bool is_telnet,
2633 bool is_waitconnect,
2634 Error **errp)
2635 {
2636 CharDriverState *chr = NULL;
2637 TCPCharDriver *s = NULL;
2638 char host[NI_MAXHOST], serv[NI_MAXSERV];
2639 const char *left = "", *right = "";
2640 struct sockaddr_storage ss;
2641 socklen_t ss_len = sizeof(ss);
2642
2643 memset(&ss, 0, ss_len);
2644 if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2645 error_setg_errno(errp, errno, "getsockname");
2646 return NULL;
2647 }
2648
2649 chr = g_malloc0(sizeof(CharDriverState));
2650 s = g_malloc0(sizeof(TCPCharDriver));
2651
2652 s->connected = 0;
2653 s->fd = -1;
2654 s->listen_fd = -1;
2655 s->msgfd = -1;
2656
2657 chr->filename = g_malloc(256);
2658 switch (ss.ss_family) {
2659 #ifndef _WIN32
2660 case AF_UNIX:
2661 s->is_unix = 1;
2662 snprintf(chr->filename, 256, "unix:%s%s",
2663 ((struct sockaddr_un *)(&ss))->sun_path,
2664 is_listen ? ",server" : "");
2665 break;
2666 #endif
2667 case AF_INET6:
2668 left = "[";
2669 right = "]";
2670 /* fall through */
2671 case AF_INET:
2672 s->do_nodelay = do_nodelay;
2673 getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
2674 serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
2675 snprintf(chr->filename, 256, "%s:%s%s%s:%s%s",
2676 is_telnet ? "telnet" : "tcp",
2677 left, host, right, serv,
2678 is_listen ? ",server" : "");
2679 break;
2680 }
2681
2682 chr->opaque = s;
2683 chr->chr_write = tcp_chr_write;
2684 chr->chr_close = tcp_chr_close;
2685 chr->get_msgfd = tcp_get_msgfd;
2686 chr->chr_add_client = tcp_chr_add_client;
2687 chr->chr_add_watch = tcp_chr_add_watch;
2688 /* be isn't opened until we get a connection */
2689 chr->explicit_be_open = true;
2690
2691 if (is_listen) {
2692 s->listen_fd = fd;
2693 s->listen_chan = io_channel_from_socket(s->listen_fd);
2694 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2695 if (is_telnet) {
2696 s->do_telnetopt = 1;
2697 }
2698 } else {
2699 s->connected = 1;
2700 s->fd = fd;
2701 socket_set_nodelay(fd);
2702 s->chan = io_channel_from_socket(s->fd);
2703 tcp_chr_connect(chr);
2704 }
2705
2706 if (is_listen && is_waitconnect) {
2707 fprintf(stderr, "QEMU waiting for connection on: %s\n",
2708 chr->filename);
2709 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
2710 qemu_set_nonblock(s->listen_fd);
2711 }
2712 return chr;
2713 }
2714
2715 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2716 {
2717 CharDriverState *chr = NULL;
2718 Error *local_err = NULL;
2719 int fd = -1;
2720
2721 bool is_listen = qemu_opt_get_bool(opts, "server", false);
2722 bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true);
2723 bool is_telnet = qemu_opt_get_bool(opts, "telnet", false);
2724 bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true);
2725 bool is_unix = qemu_opt_get(opts, "path") != NULL;
2726
2727 if (is_unix) {
2728 if (is_listen) {
2729 fd = unix_listen_opts(opts, &local_err);
2730 } else {
2731 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
2732 }
2733 } else {
2734 if (is_listen) {
2735 fd = inet_listen_opts(opts, 0, &local_err);
2736 } else {
2737 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
2738 }
2739 }
2740 if (fd < 0) {
2741 goto fail;
2742 }
2743
2744 if (!is_waitconnect)
2745 qemu_set_nonblock(fd);
2746
2747 chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet,
2748 is_waitconnect, &local_err);
2749 if (error_is_set(&local_err)) {
2750 goto fail;
2751 }
2752 return chr;
2753
2754
2755 fail:
2756 if (local_err) {
2757 qerror_report_err(local_err);
2758 error_free(local_err);
2759 }
2760 if (fd >= 0) {
2761 closesocket(fd);
2762 }
2763 if (chr) {
2764 g_free(chr->opaque);
2765 g_free(chr);
2766 }
2767 return NULL;
2768 }
2769
2770 /*********************************************************/
2771 /* Ring buffer chardev */
2772
2773 typedef struct {
2774 size_t size;
2775 size_t prod;
2776 size_t cons;
2777 uint8_t *cbuf;
2778 } RingBufCharDriver;
2779
2780 static size_t ringbuf_count(const CharDriverState *chr)
2781 {
2782 const RingBufCharDriver *d = chr->opaque;
2783
2784 return d->prod - d->cons;
2785 }
2786
2787 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2788 {
2789 RingBufCharDriver *d = chr->opaque;
2790 int i;
2791
2792 if (!buf || (len < 0)) {
2793 return -1;
2794 }
2795
2796 for (i = 0; i < len; i++ ) {
2797 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
2798 if (d->prod - d->cons > d->size) {
2799 d->cons = d->prod - d->size;
2800 }
2801 }
2802
2803 return 0;
2804 }
2805
2806 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
2807 {
2808 RingBufCharDriver *d = chr->opaque;
2809 int i;
2810
2811 for (i = 0; i < len && d->cons != d->prod; i++) {
2812 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
2813 }
2814
2815 return i;
2816 }
2817
2818 static void ringbuf_chr_close(struct CharDriverState *chr)
2819 {
2820 RingBufCharDriver *d = chr->opaque;
2821
2822 g_free(d->cbuf);
2823 g_free(d);
2824 chr->opaque = NULL;
2825 }
2826
2827 static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts,
2828 Error **errp)
2829 {
2830 CharDriverState *chr;
2831 RingBufCharDriver *d;
2832
2833 chr = g_malloc0(sizeof(CharDriverState));
2834 d = g_malloc(sizeof(*d));
2835
2836 d->size = opts->has_size ? opts->size : 65536;
2837
2838 /* The size must be power of 2 */
2839 if (d->size & (d->size - 1)) {
2840 error_setg(errp, "size of ringbuf chardev must be power of two");
2841 goto fail;
2842 }
2843
2844 d->prod = 0;
2845 d->cons = 0;
2846 d->cbuf = g_malloc0(d->size);
2847
2848 chr->opaque = d;
2849 chr->chr_write = ringbuf_chr_write;
2850 chr->chr_close = ringbuf_chr_close;
2851
2852 return chr;
2853
2854 fail:
2855 g_free(d);
2856 g_free(chr);
2857 return NULL;
2858 }
2859
2860 static bool chr_is_ringbuf(const CharDriverState *chr)
2861 {
2862 return chr->chr_write == ringbuf_chr_write;
2863 }
2864
2865 void qmp_ringbuf_write(const char *device, const char *data,
2866 bool has_format, enum DataFormat format,
2867 Error **errp)
2868 {
2869 CharDriverState *chr;
2870 const uint8_t *write_data;
2871 int ret;
2872 gsize write_count;
2873
2874 chr = qemu_chr_find(device);
2875 if (!chr) {
2876 error_setg(errp, "Device '%s' not found", device);
2877 return;
2878 }
2879
2880 if (!chr_is_ringbuf(chr)) {
2881 error_setg(errp,"%s is not a ringbuf device", device);
2882 return;
2883 }
2884
2885 if (has_format && (format == DATA_FORMAT_BASE64)) {
2886 write_data = g_base64_decode(data, &write_count);
2887 } else {
2888 write_data = (uint8_t *)data;
2889 write_count = strlen(data);
2890 }
2891
2892 ret = ringbuf_chr_write(chr, write_data, write_count);
2893
2894 if (write_data != (uint8_t *)data) {
2895 g_free((void *)write_data);
2896 }
2897
2898 if (ret < 0) {
2899 error_setg(errp, "Failed to write to device %s", device);
2900 return;
2901 }
2902 }
2903
2904 char *qmp_ringbuf_read(const char *device, int64_t size,
2905 bool has_format, enum DataFormat format,
2906 Error **errp)
2907 {
2908 CharDriverState *chr;
2909 uint8_t *read_data;
2910 size_t count;
2911 char *data;
2912
2913 chr = qemu_chr_find(device);
2914 if (!chr) {
2915 error_setg(errp, "Device '%s' not found", device);
2916 return NULL;
2917 }
2918
2919 if (!chr_is_ringbuf(chr)) {
2920 error_setg(errp,"%s is not a ringbuf device", device);
2921 return NULL;
2922 }
2923
2924 if (size <= 0) {
2925 error_setg(errp, "size must be greater than zero");
2926 return NULL;
2927 }
2928
2929 count = ringbuf_count(chr);
2930 size = size > count ? count : size;
2931 read_data = g_malloc(size + 1);
2932
2933 ringbuf_chr_read(chr, read_data, size);
2934
2935 if (has_format && (format == DATA_FORMAT_BASE64)) {
2936 data = g_base64_encode(read_data, size);
2937 g_free(read_data);
2938 } else {
2939 /*
2940 * FIXME should read only complete, valid UTF-8 characters up
2941 * to @size bytes. Invalid sequences should be replaced by a
2942 * suitable replacement character. Except when (and only
2943 * when) ring buffer lost characters since last read, initial
2944 * continuation characters should be dropped.
2945 */
2946 read_data[size] = 0;
2947 data = (char *)read_data;
2948 }
2949
2950 return data;
2951 }
2952
2953 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2954 {
2955 char host[65], port[33], width[8], height[8];
2956 int pos;
2957 const char *p;
2958 QemuOpts *opts;
2959 Error *local_err = NULL;
2960
2961 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
2962 if (error_is_set(&local_err)) {
2963 qerror_report_err(local_err);
2964 error_free(local_err);
2965 return NULL;
2966 }
2967
2968 if (strstart(filename, "mon:", &p)) {
2969 filename = p;
2970 qemu_opt_set(opts, "mux", "on");
2971 if (strcmp(filename, "stdio") == 0) {
2972 /* Monitor is muxed to stdio: do not exit on Ctrl+C by default
2973 * but pass it to the guest. Handle this only for compat syntax,
2974 * for -chardev syntax we have special option for this.
2975 * This is what -nographic did, redirecting+muxing serial+monitor
2976 * to stdio causing Ctrl+C to be passed to guest. */
2977 qemu_opt_set(opts, "signal", "off");
2978 }
2979 }
2980
2981 if (strcmp(filename, "null") == 0 ||
2982 strcmp(filename, "pty") == 0 ||
2983 strcmp(filename, "msmouse") == 0 ||
2984 strcmp(filename, "braille") == 0 ||
2985 strcmp(filename, "stdio") == 0) {
2986 qemu_opt_set(opts, "backend", filename);
2987 return opts;
2988 }
2989 if (strstart(filename, "vc", &p)) {
2990 qemu_opt_set(opts, "backend", "vc");
2991 if (*p == ':') {
2992 if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
2993 /* pixels */
2994 qemu_opt_set(opts, "width", width);
2995 qemu_opt_set(opts, "height", height);
2996 } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
2997 /* chars */
2998 qemu_opt_set(opts, "cols", width);
2999 qemu_opt_set(opts, "rows", height);
3000 } else {
3001 goto fail;
3002 }
3003 }
3004 return opts;
3005 }
3006 if (strcmp(filename, "con:") == 0) {
3007 qemu_opt_set(opts, "backend", "console");
3008 return opts;
3009 }
3010 if (strstart(filename, "COM", NULL)) {
3011 qemu_opt_set(opts, "backend", "serial");
3012 qemu_opt_set(opts, "path", filename);
3013 return opts;
3014 }
3015 if (strstart(filename, "file:", &p)) {
3016 qemu_opt_set(opts, "backend", "file");
3017 qemu_opt_set(opts, "path", p);
3018 return opts;
3019 }
3020 if (strstart(filename, "pipe:", &p)) {
3021 qemu_opt_set(opts, "backend", "pipe");
3022 qemu_opt_set(opts, "path", p);
3023 return opts;
3024 }
3025 if (strstart(filename, "tcp:", &p) ||
3026 strstart(filename, "telnet:", &p)) {
3027 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3028 host[0] = 0;
3029 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3030 goto fail;
3031 }
3032 qemu_opt_set(opts, "backend", "socket");
3033 qemu_opt_set(opts, "host", host);
3034 qemu_opt_set(opts, "port", port);
3035 if (p[pos] == ',') {
3036 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
3037 goto fail;
3038 }
3039 if (strstart(filename, "telnet:", &p))
3040 qemu_opt_set(opts, "telnet", "on");
3041 return opts;
3042 }
3043 if (strstart(filename, "udp:", &p)) {
3044 qemu_opt_set(opts, "backend", "udp");
3045 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3046 host[0] = 0;
3047 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3048 goto fail;
3049 }
3050 }
3051 qemu_opt_set(opts, "host", host);
3052 qemu_opt_set(opts, "port", port);
3053 if (p[pos] == '@') {
3054 p += pos + 1;
3055 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3056 host[0] = 0;
3057 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3058 goto fail;
3059 }
3060 }
3061 qemu_opt_set(opts, "localaddr", host);
3062 qemu_opt_set(opts, "localport", port);
3063 }
3064 return opts;
3065 }
3066 if (strstart(filename, "unix:", &p)) {
3067 qemu_opt_set(opts, "backend", "socket");
3068 if (qemu_opts_do_parse(opts, p, "path") != 0)
3069 goto fail;
3070 return opts;
3071 }
3072 if (strstart(filename, "/dev/parport", NULL) ||
3073 strstart(filename, "/dev/ppi", NULL)) {
3074 qemu_opt_set(opts, "backend", "parport");
3075 qemu_opt_set(opts, "path", filename);
3076 return opts;
3077 }
3078 if (strstart(filename, "/dev/", NULL)) {
3079 qemu_opt_set(opts, "backend", "tty");
3080 qemu_opt_set(opts, "path", filename);
3081 return opts;
3082 }
3083
3084 fail:
3085 qemu_opts_del(opts);
3086 return NULL;
3087 }
3088
3089 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3090 Error **errp)
3091 {
3092 const char *path = qemu_opt_get(opts, "path");
3093
3094 if (path == NULL) {
3095 error_setg(errp, "chardev: file: no filename given");
3096 return;
3097 }
3098 backend->file = g_new0(ChardevFile, 1);
3099 backend->file->out = g_strdup(path);
3100 }
3101
3102 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3103 Error **errp)
3104 {
3105 backend->stdio = g_new0(ChardevStdio, 1);
3106 backend->stdio->has_signal = true;
3107 backend->stdio->signal = qemu_opt_get_bool(opts, "signal", true);
3108 }
3109
3110 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3111 Error **errp)
3112 {
3113 const char *device = qemu_opt_get(opts, "path");
3114
3115 if (device == NULL) {
3116 error_setg(errp, "chardev: serial/tty: no device path given");
3117 return;
3118 }
3119 backend->serial = g_new0(ChardevHostdev, 1);
3120 backend->serial->device = g_strdup(device);
3121 }
3122
3123 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3124 Error **errp)
3125 {
3126 const char *device = qemu_opt_get(opts, "path");
3127
3128 if (device == NULL) {
3129 error_setg(errp, "chardev: parallel: no device path given");
3130 return;
3131 }
3132 backend->parallel = g_new0(ChardevHostdev, 1);
3133 backend->parallel->device = g_strdup(device);
3134 }
3135
3136 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3137 Error **errp)
3138 {
3139 const char *device = qemu_opt_get(opts, "path");
3140
3141 if (device == NULL) {
3142 error_setg(errp, "chardev: pipe: no device path given");
3143 return;
3144 }
3145 backend->pipe = g_new0(ChardevHostdev, 1);
3146 backend->pipe->device = g_strdup(device);
3147 }
3148
3149 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3150 Error **errp)
3151 {
3152 int val;
3153
3154 backend->ringbuf = g_new0(ChardevRingbuf, 1);
3155
3156 val = qemu_opt_get_size(opts, "size", 0);
3157 if (val != 0) {
3158 backend->ringbuf->has_size = true;
3159 backend->ringbuf->size = val;
3160 }
3161 }
3162
3163 static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
3164 Error **errp)
3165 {
3166 const char *chardev = qemu_opt_get(opts, "chardev");
3167
3168 if (chardev == NULL) {
3169 error_setg(errp, "chardev: mux: no chardev given");
3170 return;
3171 }
3172 backend->mux = g_new0(ChardevMux, 1);
3173 backend->mux->chardev = g_strdup(chardev);
3174 }
3175
3176 typedef struct CharDriver {
3177 const char *name;
3178 /* old, pre qapi */
3179 CharDriverState *(*open)(QemuOpts *opts);
3180 /* new, qapi-based */
3181 ChardevBackendKind kind;
3182 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3183 } CharDriver;
3184
3185 static GSList *backends;
3186
3187 void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *))
3188 {
3189 CharDriver *s;
3190
3191 s = g_malloc0(sizeof(*s));
3192 s->name = g_strdup(name);
3193 s->open = open;
3194
3195 backends = g_slist_append(backends, s);
3196 }
3197
3198 void register_char_driver_qapi(const char *name, ChardevBackendKind kind,
3199 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp))
3200 {
3201 CharDriver *s;
3202
3203 s = g_malloc0(sizeof(*s));
3204 s->name = g_strdup(name);
3205 s->kind = kind;
3206 s->parse = parse;
3207
3208 backends = g_slist_append(backends, s);
3209 }
3210
3211 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3212 void (*init)(struct CharDriverState *s),
3213 Error **errp)
3214 {
3215 CharDriver *cd;
3216 CharDriverState *chr;
3217 GSList *i;
3218
3219 if (qemu_opts_id(opts) == NULL) {
3220 error_setg(errp, "chardev: no id specified");
3221 goto err;
3222 }
3223
3224 if (qemu_opt_get(opts, "backend") == NULL) {
3225 error_setg(errp, "chardev: \"%s\" missing backend",
3226 qemu_opts_id(opts));
3227 goto err;
3228 }
3229 for (i = backends; i; i = i->next) {
3230 cd = i->data;
3231
3232 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3233 break;
3234 }
3235 }
3236 if (i == NULL) {
3237 error_setg(errp, "chardev: backend \"%s\" not found",
3238 qemu_opt_get(opts, "backend"));
3239 goto err;
3240 }
3241
3242 if (!cd->open) {
3243 /* using new, qapi init */
3244 ChardevBackend *backend = g_new0(ChardevBackend, 1);
3245 ChardevReturn *ret = NULL;
3246 const char *id = qemu_opts_id(opts);
3247 char *bid = NULL;
3248
3249 if (qemu_opt_get_bool(opts, "mux", 0)) {
3250 bid = g_strdup_printf("%s-base", id);
3251 }
3252
3253 chr = NULL;
3254 backend->kind = cd->kind;
3255 if (cd->parse) {
3256 cd->parse(opts, backend, errp);
3257 if (error_is_set(errp)) {
3258 goto qapi_out;
3259 }
3260 }
3261 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3262 if (error_is_set(errp)) {
3263 goto qapi_out;
3264 }
3265
3266 if (bid) {
3267 qapi_free_ChardevBackend(backend);
3268 qapi_free_ChardevReturn(ret);
3269 backend = g_new0(ChardevBackend, 1);
3270 backend->mux = g_new0(ChardevMux, 1);
3271 backend->kind = CHARDEV_BACKEND_KIND_MUX;
3272 backend->mux->chardev = g_strdup(bid);
3273 ret = qmp_chardev_add(id, backend, errp);
3274 assert(!error_is_set(errp));
3275 }
3276
3277 chr = qemu_chr_find(id);
3278 chr->opts = opts;
3279
3280 qapi_out:
3281 qapi_free_ChardevBackend(backend);
3282 qapi_free_ChardevReturn(ret);
3283 g_free(bid);
3284 return chr;
3285 }
3286
3287 chr = cd->open(opts);
3288 if (!chr) {
3289 error_setg(errp, "chardev: opening backend \"%s\" failed",
3290 qemu_opt_get(opts, "backend"));
3291 goto err;
3292 }
3293
3294 if (!chr->filename)
3295 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
3296 chr->init = init;
3297 /* if we didn't create the chardev via qmp_chardev_add, we
3298 * need to send the OPENED event here
3299 */
3300 if (!chr->explicit_be_open) {
3301 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
3302 }
3303 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3304
3305 if (qemu_opt_get_bool(opts, "mux", 0)) {
3306 CharDriverState *base = chr;
3307 int len = strlen(qemu_opts_id(opts)) + 6;
3308 base->label = g_malloc(len);
3309 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
3310 chr = qemu_chr_open_mux(base);
3311 chr->filename = base->filename;
3312 chr->avail_connections = MAX_MUX;
3313 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3314 } else {
3315 chr->avail_connections = 1;
3316 }
3317 chr->label = g_strdup(qemu_opts_id(opts));
3318 chr->opts = opts;
3319 return chr;
3320
3321 err:
3322 qemu_opts_del(opts);
3323 return NULL;
3324 }
3325
3326 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3327 {
3328 const char *p;
3329 CharDriverState *chr;
3330 QemuOpts *opts;
3331 Error *err = NULL;
3332
3333 if (strstart(filename, "chardev:", &p)) {
3334 return qemu_chr_find(p);
3335 }
3336
3337 opts = qemu_chr_parse_compat(label, filename);
3338 if (!opts)
3339 return NULL;
3340
3341 chr = qemu_chr_new_from_opts(opts, init, &err);
3342 if (error_is_set(&err)) {
3343 error_report("%s", error_get_pretty(err));
3344 error_free(err);
3345 }
3346 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3347 qemu_chr_fe_claim_no_fail(chr);
3348 monitor_init(chr, MONITOR_USE_READLINE);
3349 }
3350 return chr;
3351 }
3352
3353 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3354 {
3355 if (chr->chr_set_echo) {
3356 chr->chr_set_echo(chr, echo);
3357 }
3358 }
3359
3360 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
3361 {
3362 if (chr->fe_open == fe_open) {
3363 return;
3364 }
3365 chr->fe_open = fe_open;
3366 if (chr->chr_set_fe_open) {
3367 chr->chr_set_fe_open(chr, fe_open);
3368 }
3369 }
3370
3371 int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3372 GIOFunc func, void *user_data)
3373 {
3374 GSource *src;
3375 guint tag;
3376
3377 if (s->chr_add_watch == NULL) {
3378 return -ENOSYS;
3379 }
3380
3381 src = s->chr_add_watch(s, cond);
3382 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3383 tag = g_source_attach(src, NULL);
3384 g_source_unref(src);
3385
3386 return tag;
3387 }
3388
3389 int qemu_chr_fe_claim(CharDriverState *s)
3390 {
3391 if (s->avail_connections < 1) {
3392 return -1;
3393 }
3394 s->avail_connections--;
3395 return 0;
3396 }
3397
3398 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
3399 {
3400 if (qemu_chr_fe_claim(s) != 0) {
3401 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
3402 __func__, s->label);
3403 exit(1);
3404 }
3405 }
3406
3407 void qemu_chr_fe_release(CharDriverState *s)
3408 {
3409 s->avail_connections++;
3410 }
3411
3412 void qemu_chr_delete(CharDriverState *chr)
3413 {
3414 QTAILQ_REMOVE(&chardevs, chr, next);
3415 if (chr->chr_close) {
3416 chr->chr_close(chr);
3417 }
3418 g_free(chr->filename);
3419 g_free(chr->label);
3420 if (chr->opts) {
3421 qemu_opts_del(chr->opts);
3422 }
3423 g_free(chr);
3424 }
3425
3426 ChardevInfoList *qmp_query_chardev(Error **errp)
3427 {
3428 ChardevInfoList *chr_list = NULL;
3429 CharDriverState *chr;
3430
3431 QTAILQ_FOREACH(chr, &chardevs, next) {
3432 ChardevInfoList *info = g_malloc0(sizeof(*info));
3433 info->value = g_malloc0(sizeof(*info->value));
3434 info->value->label = g_strdup(chr->label);
3435 info->value->filename = g_strdup(chr->filename);
3436
3437 info->next = chr_list;
3438 chr_list = info;
3439 }
3440
3441 return chr_list;
3442 }
3443
3444 CharDriverState *qemu_chr_find(const char *name)
3445 {
3446 CharDriverState *chr;
3447
3448 QTAILQ_FOREACH(chr, &chardevs, next) {
3449 if (strcmp(chr->label, name) != 0)
3450 continue;
3451 return chr;
3452 }
3453 return NULL;
3454 }
3455
3456 /* Get a character (serial) device interface. */
3457 CharDriverState *qemu_char_get_next_serial(void)
3458 {
3459 static int next_serial;
3460 CharDriverState *chr;
3461
3462 /* FIXME: This function needs to go away: use chardev properties! */
3463
3464 while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
3465 chr = serial_hds[next_serial++];
3466 qemu_chr_fe_claim_no_fail(chr);
3467 return chr;
3468 }
3469 return NULL;
3470 }
3471
3472 QemuOptsList qemu_chardev_opts = {
3473 .name = "chardev",
3474 .implied_opt_name = "backend",
3475 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3476 .desc = {
3477 {
3478 .name = "backend",
3479 .type = QEMU_OPT_STRING,
3480 },{
3481 .name = "path",
3482 .type = QEMU_OPT_STRING,
3483 },{
3484 .name = "host",
3485 .type = QEMU_OPT_STRING,
3486 },{
3487 .name = "port",
3488 .type = QEMU_OPT_STRING,
3489 },{
3490 .name = "localaddr",
3491 .type = QEMU_OPT_STRING,
3492 },{
3493 .name = "localport",
3494 .type = QEMU_OPT_STRING,
3495 },{
3496 .name = "to",
3497 .type = QEMU_OPT_NUMBER,
3498 },{
3499 .name = "ipv4",
3500 .type = QEMU_OPT_BOOL,
3501 },{
3502 .name = "ipv6",
3503 .type = QEMU_OPT_BOOL,
3504 },{
3505 .name = "wait",
3506 .type = QEMU_OPT_BOOL,
3507 },{
3508 .name = "server",
3509 .type = QEMU_OPT_BOOL,
3510 },{
3511 .name = "delay",
3512 .type = QEMU_OPT_BOOL,
3513 },{
3514 .name = "telnet",
3515 .type = QEMU_OPT_BOOL,
3516 },{
3517 .name = "width",
3518 .type = QEMU_OPT_NUMBER,
3519 },{
3520 .name = "height",
3521 .type = QEMU_OPT_NUMBER,
3522 },{
3523 .name = "cols",
3524 .type = QEMU_OPT_NUMBER,
3525 },{
3526 .name = "rows",
3527 .type = QEMU_OPT_NUMBER,
3528 },{
3529 .name = "mux",
3530 .type = QEMU_OPT_BOOL,
3531 },{
3532 .name = "signal",
3533 .type = QEMU_OPT_BOOL,
3534 },{
3535 .name = "name",
3536 .type = QEMU_OPT_STRING,
3537 },{
3538 .name = "debug",
3539 .type = QEMU_OPT_NUMBER,
3540 },{
3541 .name = "size",
3542 .type = QEMU_OPT_SIZE,
3543 },{
3544 .name = "chardev",
3545 .type = QEMU_OPT_STRING,
3546 },
3547 { /* end of list */ }
3548 },
3549 };
3550
3551 #ifdef _WIN32
3552
3553 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3554 {
3555 HANDLE out;
3556
3557 if (file->has_in) {
3558 error_setg(errp, "input file not supported");
3559 return NULL;
3560 }
3561
3562 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
3563 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
3564 if (out == INVALID_HANDLE_VALUE) {
3565 error_setg(errp, "open %s failed", file->out);
3566 return NULL;
3567 }
3568 return qemu_chr_open_win_file(out);
3569 }
3570
3571 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3572 Error **errp)
3573 {
3574 return qemu_chr_open_win_path(serial->device);
3575 }
3576
3577 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3578 Error **errp)
3579 {
3580 error_setg(errp, "character device backend type 'parallel' not supported");
3581 return NULL;
3582 }
3583
3584 #else /* WIN32 */
3585
3586 static int qmp_chardev_open_file_source(char *src, int flags,
3587 Error **errp)
3588 {
3589 int fd = -1;
3590
3591 TFR(fd = qemu_open(src, flags, 0666));
3592 if (fd == -1) {
3593 error_setg_file_open(errp, errno, src);
3594 }
3595 return fd;
3596 }
3597
3598 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3599 {
3600 int flags, in = -1, out = -1;
3601
3602 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
3603 out = qmp_chardev_open_file_source(file->out, flags, errp);
3604 if (error_is_set(errp)) {
3605 return NULL;
3606 }
3607
3608 if (file->has_in) {
3609 flags = O_RDONLY;
3610 in = qmp_chardev_open_file_source(file->in, flags, errp);
3611 if (error_is_set(errp)) {
3612 qemu_close(out);
3613 return NULL;
3614 }
3615 }
3616
3617 return qemu_chr_open_fd(in, out);
3618 }
3619
3620 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3621 Error **errp)
3622 {
3623 #ifdef HAVE_CHARDEV_TTY
3624 int fd;
3625
3626 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
3627 if (error_is_set(errp)) {
3628 return NULL;
3629 }
3630 qemu_set_nonblock(fd);
3631 return qemu_chr_open_tty_fd(fd);
3632 #else
3633 error_setg(errp, "character device backend type 'serial' not supported");
3634 return NULL;
3635 #endif
3636 }
3637
3638 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3639 Error **errp)
3640 {
3641 #ifdef HAVE_CHARDEV_PARPORT
3642 int fd;
3643
3644 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
3645 if (error_is_set(errp)) {
3646 return NULL;
3647 }
3648 return qemu_chr_open_pp_fd(fd);
3649 #else
3650 error_setg(errp, "character device backend type 'parallel' not supported");
3651 return NULL;
3652 #endif
3653 }
3654
3655 #endif /* WIN32 */
3656
3657 static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
3658 Error **errp)
3659 {
3660 SocketAddress *addr = sock->addr;
3661 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
3662 bool is_listen = sock->has_server ? sock->server : true;
3663 bool is_telnet = sock->has_telnet ? sock->telnet : false;
3664 bool is_waitconnect = sock->has_wait ? sock->wait : false;
3665 int fd;
3666
3667 if (is_listen) {
3668 fd = socket_listen(addr, errp);
3669 } else {
3670 fd = socket_connect(addr, errp, NULL, NULL);
3671 }
3672 if (error_is_set(errp)) {
3673 return NULL;
3674 }
3675 return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
3676 is_telnet, is_waitconnect, errp);
3677 }
3678
3679 static CharDriverState *qmp_chardev_open_udp(ChardevUdp *udp,
3680 Error **errp)
3681 {
3682 int fd;
3683
3684 fd = socket_dgram(udp->remote, udp->local, errp);
3685 if (error_is_set(errp)) {
3686 return NULL;
3687 }
3688 return qemu_chr_open_udp_fd(fd);
3689 }
3690
3691 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
3692 Error **errp)
3693 {
3694 ChardevReturn *ret = g_new0(ChardevReturn, 1);
3695 CharDriverState *base, *chr = NULL;
3696
3697 chr = qemu_chr_find(id);
3698 if (chr) {
3699 error_setg(errp, "Chardev '%s' already exists", id);
3700 g_free(ret);
3701 return NULL;
3702 }
3703
3704 switch (backend->kind) {
3705 case CHARDEV_BACKEND_KIND_FILE:
3706 chr = qmp_chardev_open_file(backend->file, errp);
3707 break;
3708 case CHARDEV_BACKEND_KIND_SERIAL:
3709 chr = qmp_chardev_open_serial(backend->serial, errp);
3710 break;
3711 case CHARDEV_BACKEND_KIND_PARALLEL:
3712 chr = qmp_chardev_open_parallel(backend->parallel, errp);
3713 break;
3714 case CHARDEV_BACKEND_KIND_PIPE:
3715 chr = qemu_chr_open_pipe(backend->pipe);
3716 break;
3717 case CHARDEV_BACKEND_KIND_SOCKET:
3718 chr = qmp_chardev_open_socket(backend->socket, errp);
3719 break;
3720 case CHARDEV_BACKEND_KIND_UDP:
3721 chr = qmp_chardev_open_udp(backend->udp, errp);
3722 break;
3723 #ifdef HAVE_CHARDEV_TTY
3724 case CHARDEV_BACKEND_KIND_PTY:
3725 chr = qemu_chr_open_pty(id, ret);
3726 break;
3727 #endif
3728 case CHARDEV_BACKEND_KIND_NULL:
3729 chr = qemu_chr_open_null();
3730 break;
3731 case CHARDEV_BACKEND_KIND_MUX:
3732 base = qemu_chr_find(backend->mux->chardev);
3733 if (base == NULL) {
3734 error_setg(errp, "mux: base chardev %s not found",
3735 backend->mux->chardev);
3736 break;
3737 }
3738 chr = qemu_chr_open_mux(base);
3739 break;
3740 case CHARDEV_BACKEND_KIND_MSMOUSE:
3741 chr = qemu_chr_open_msmouse();
3742 break;
3743 #ifdef CONFIG_BRLAPI
3744 case CHARDEV_BACKEND_KIND_BRAILLE:
3745 chr = chr_baum_init();
3746 break;
3747 #endif
3748 case CHARDEV_BACKEND_KIND_STDIO:
3749 chr = qemu_chr_open_stdio(backend->stdio);
3750 break;
3751 #ifdef _WIN32
3752 case CHARDEV_BACKEND_KIND_CONSOLE:
3753 chr = qemu_chr_open_win_con();
3754 break;
3755 #endif
3756 #ifdef CONFIG_SPICE
3757 case CHARDEV_BACKEND_KIND_SPICEVMC:
3758 chr = qemu_chr_open_spice_vmc(backend->spicevmc->type);
3759 break;
3760 case CHARDEV_BACKEND_KIND_SPICEPORT:
3761 chr = qemu_chr_open_spice_port(backend->spiceport->fqdn);
3762 break;
3763 #endif
3764 case CHARDEV_BACKEND_KIND_VC:
3765 chr = vc_init(backend->vc);
3766 break;
3767 case CHARDEV_BACKEND_KIND_RINGBUF:
3768 case CHARDEV_BACKEND_KIND_MEMORY:
3769 chr = qemu_chr_open_ringbuf(backend->ringbuf, errp);
3770 break;
3771 default:
3772 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
3773 break;
3774 }
3775
3776 if (chr == NULL && !error_is_set(errp)) {
3777 error_setg(errp, "Failed to create chardev");
3778 }
3779 if (chr) {
3780 chr->label = g_strdup(id);
3781 chr->avail_connections =
3782 (backend->kind == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
3783 if (!chr->filename) {
3784 chr->filename = g_strdup(ChardevBackendKind_lookup[backend->kind]);
3785 }
3786 if (!chr->explicit_be_open) {
3787 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
3788 }
3789 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3790 return ret;
3791 } else {
3792 g_free(ret);
3793 return NULL;
3794 }
3795 }
3796
3797 void qmp_chardev_remove(const char *id, Error **errp)
3798 {
3799 CharDriverState *chr;
3800
3801 chr = qemu_chr_find(id);
3802 if (NULL == chr) {
3803 error_setg(errp, "Chardev '%s' not found", id);
3804 return;
3805 }
3806 if (chr->chr_can_read || chr->chr_read ||
3807 chr->chr_event || chr->handler_opaque) {
3808 error_setg(errp, "Chardev '%s' is busy", id);
3809 return;
3810 }
3811 qemu_chr_delete(chr);
3812 }
3813
3814 static void register_types(void)
3815 {
3816 register_char_driver_qapi("null", CHARDEV_BACKEND_KIND_NULL, NULL);
3817 register_char_driver("socket", qemu_chr_open_socket);
3818 register_char_driver("udp", qemu_chr_open_udp);
3819 register_char_driver_qapi("ringbuf", CHARDEV_BACKEND_KIND_RINGBUF,
3820 qemu_chr_parse_ringbuf);
3821 register_char_driver_qapi("file", CHARDEV_BACKEND_KIND_FILE,
3822 qemu_chr_parse_file_out);
3823 register_char_driver_qapi("stdio", CHARDEV_BACKEND_KIND_STDIO,
3824 qemu_chr_parse_stdio);
3825 register_char_driver_qapi("serial", CHARDEV_BACKEND_KIND_SERIAL,
3826 qemu_chr_parse_serial);
3827 register_char_driver_qapi("tty", CHARDEV_BACKEND_KIND_SERIAL,
3828 qemu_chr_parse_serial);
3829 register_char_driver_qapi("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
3830 qemu_chr_parse_parallel);
3831 register_char_driver_qapi("parport", CHARDEV_BACKEND_KIND_PARALLEL,
3832 qemu_chr_parse_parallel);
3833 register_char_driver_qapi("pty", CHARDEV_BACKEND_KIND_PTY, NULL);
3834 register_char_driver_qapi("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL);
3835 register_char_driver_qapi("pipe", CHARDEV_BACKEND_KIND_PIPE,
3836 qemu_chr_parse_pipe);
3837 register_char_driver_qapi("mux", CHARDEV_BACKEND_KIND_MUX,
3838 qemu_chr_parse_mux);
3839 /* Bug-compatibility: */
3840 register_char_driver_qapi("memory", CHARDEV_BACKEND_KIND_MEMORY,
3841 qemu_chr_parse_ringbuf);
3842 /* this must be done after machine init, since we register FEs with muxes
3843 * as part of realize functions like serial_isa_realizefn when -nographic
3844 * is specified
3845 */
3846 qemu_add_machine_init_done_notifier(&muxes_realize_notify);
3847 }
3848
3849 type_init(register_types);
AR7 emulation for QEMU