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