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