?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
qemu-char: Register ring buffer driver with correct name "ringbuf"
[qemu/ar7.git] / qemu-char.c
blob742b73ba697fbe766edd5d4369e2c1f5b5ece523
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu-common.h"
25 #include "monitor/monitor.h"
26 #include "ui/console.h"
27 #include "sysemu/sysemu.h"
28 #include "qemu/timer.h"
29 #include "sysemu/char.h"
30 #include "hw/usb.h"
31 #include "qmp-commands.h"
32
33 #include <unistd.h>
34 #include <fcntl.h>
35 #include <time.h>
36 #include <errno.h>
37 #include <sys/time.h>
38 #include <zlib.h>
39
40 #ifndef _WIN32
41 #include <sys/times.h>
42 #include <sys/wait.h>
43 #include <termios.h>
44 #include <sys/mman.h>
45 #include <sys/ioctl.h>
46 #include <sys/resource.h>
47 #include <sys/socket.h>
48 #include <netinet/in.h>
49 #include <net/if.h>
50 #include <arpa/inet.h>
51 #include <dirent.h>
52 #include <netdb.h>
53 #include <sys/select.h>
54 #ifdef CONFIG_BSD
55 #include <sys/stat.h>
56 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
57 #include <dev/ppbus/ppi.h>
58 #include <dev/ppbus/ppbconf.h>
59 #elif defined(__DragonFly__)
60 #include <dev/misc/ppi/ppi.h>
61 #include <bus/ppbus/ppbconf.h>
62 #endif
63 #else
64 #ifdef __linux__
65 #include <linux/ppdev.h>
66 #include <linux/parport.h>
67 #endif
68 #ifdef __sun__
69 #include <sys/stat.h>
70 #include <sys/ethernet.h>
71 #include <sys/sockio.h>
72 #include <netinet/arp.h>
73 #include <netinet/in.h>
74 #include <netinet/in_systm.h>
75 #include <netinet/ip.h>
76 #include <netinet/ip_icmp.h> // must come after ip.h
77 #include <netinet/udp.h>
78 #include <netinet/tcp.h>
79 #endif
80 #endif
81 #endif
82
83 #include "qemu/sockets.h"
84 #include "ui/qemu-spice.h"
85
86 #define READ_BUF_LEN 4096
87
88 /***********************************************************/
89 /* character device */
90
91 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
92 QTAILQ_HEAD_INITIALIZER(chardevs);
93
94 void qemu_chr_be_event(CharDriverState *s, int event)
95 {
96 /* Keep track if the char device is open */
97 switch (event) {
98 case CHR_EVENT_OPENED:
99 s->be_open = 1;
100 break;
101 case CHR_EVENT_CLOSED:
102 s->be_open = 0;
103 break;
104 }
105
106 if (!s->chr_event)
107 return;
108 s->chr_event(s->handler_opaque, event);
109 }
110
111 void qemu_chr_be_generic_open(CharDriverState *s)
112 {
113 qemu_chr_be_event(s, CHR_EVENT_OPENED);
114 }
115
116 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
117 {
118 return s->chr_write(s, buf, len);
119 }
120
121 int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len)
122 {
123 int offset = 0;
124 int res;
125
126 while (offset < len) {
127 do {
128 res = s->chr_write(s, buf + offset, len - offset);
129 if (res == -1 && errno == EAGAIN) {
130 g_usleep(100);
131 }
132 } while (res == -1 && errno == EAGAIN);
133
134 if (res == 0) {
135 break;
136 }
137
138 if (res < 0) {
139 return res;
140 }
141
142 offset += res;
143 }
144
145 return offset;
146 }
147
148 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
149 {
150 if (!s->chr_ioctl)
151 return -ENOTSUP;
152 return s->chr_ioctl(s, cmd, arg);
153 }
154
155 int qemu_chr_be_can_write(CharDriverState *s)
156 {
157 if (!s->chr_can_read)
158 return 0;
159 return s->chr_can_read(s->handler_opaque);
160 }
161
162 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
163 {
164 if (s->chr_read) {
165 s->chr_read(s->handler_opaque, buf, len);
166 }
167 }
168
169 int qemu_chr_fe_get_msgfd(CharDriverState *s)
170 {
171 return s->get_msgfd ? s->get_msgfd(s) : -1;
172 }
173
174 int qemu_chr_add_client(CharDriverState *s, int fd)
175 {
176 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
177 }
178
179 void qemu_chr_accept_input(CharDriverState *s)
180 {
181 if (s->chr_accept_input)
182 s->chr_accept_input(s);
183 qemu_notify_event();
184 }
185
186 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
187 {
188 char buf[READ_BUF_LEN];
189 va_list ap;
190 va_start(ap, fmt);
191 vsnprintf(buf, sizeof(buf), fmt, ap);
192 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
193 va_end(ap);
194 }
195
196 void qemu_chr_add_handlers(CharDriverState *s,
197 IOCanReadHandler *fd_can_read,
198 IOReadHandler *fd_read,
199 IOEventHandler *fd_event,
200 void *opaque)
201 {
202 int fe_open;
203
204 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
205 fe_open = 0;
206 } else {
207 fe_open = 1;
208 }
209 s->chr_can_read = fd_can_read;
210 s->chr_read = fd_read;
211 s->chr_event = fd_event;
212 s->handler_opaque = opaque;
213 if (s->chr_update_read_handler)
214 s->chr_update_read_handler(s);
215
216 if (!s->explicit_fe_open) {
217 qemu_chr_fe_set_open(s, fe_open);
218 }
219
220 /* We're connecting to an already opened device, so let's make sure we
221 also get the open event */
222 if (fe_open && s->be_open) {
223 qemu_chr_be_generic_open(s);
224 }
225 }
226
227 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
228 {
229 return len;
230 }
231
232 static CharDriverState *qemu_chr_open_null(void)
233 {
234 CharDriverState *chr;
235
236 chr = g_malloc0(sizeof(CharDriverState));
237 chr->chr_write = null_chr_write;
238 chr->explicit_be_open = true;
239 return chr;
240 }
241
242 /* MUX driver for serial I/O splitting */
243 #define MAX_MUX 4
244 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
245 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
246 typedef struct {
247 IOCanReadHandler *chr_can_read[MAX_MUX];
248 IOReadHandler *chr_read[MAX_MUX];
249 IOEventHandler *chr_event[MAX_MUX];
250 void *ext_opaque[MAX_MUX];
251 CharDriverState *drv;
252 int focus;
253 int mux_cnt;
254 int term_got_escape;
255 int max_size;
256 /* Intermediate input buffer allows to catch escape sequences even if the
257 currently active device is not accepting any input - but only until it
258 is full as well. */
259 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
260 int prod[MAX_MUX];
261 int cons[MAX_MUX];
262 int timestamps;
263 int linestart;
264 int64_t timestamps_start;
265 } MuxDriver;
266
267
268 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
269 {
270 MuxDriver *d = chr->opaque;
271 int ret;
272 if (!d->timestamps) {
273 ret = d->drv->chr_write(d->drv, buf, len);
274 } else {
275 int i;
276
277 ret = 0;
278 for (i = 0; i < len; i++) {
279 if (d->linestart) {
280 char buf1[64];
281 int64_t ti;
282 int secs;
283
284 ti = qemu_get_clock_ms(rt_clock);
285 if (d->timestamps_start == -1)
286 d->timestamps_start = ti;
287 ti -= d->timestamps_start;
288 secs = ti / 1000;
289 snprintf(buf1, sizeof(buf1),
290 "[%02d:%02d:%02d.%03d] ",
291 secs / 3600,
292 (secs / 60) % 60,
293 secs % 60,
294 (int)(ti % 1000));
295 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
296 d->linestart = 0;
297 }
298 ret += d->drv->chr_write(d->drv, buf+i, 1);
299 if (buf[i] == '\n') {
300 d->linestart = 1;
301 }
302 }
303 }
304 return ret;
305 }
306
307 static const char * const mux_help[] = {
308 "% h print this help\n\r",
309 "% x exit emulator\n\r",
310 "% s save disk data back to file (if -snapshot)\n\r",
311 "% t toggle console timestamps\n\r"
312 "% b send break (magic sysrq)\n\r",
313 "% c switch between console and monitor\n\r",
314 "% % sends %\n\r",
315 NULL
316 };
317
318 int term_escape_char = 0x01; /* ctrl-a is used for escape */
319 static void mux_print_help(CharDriverState *chr)
320 {
321 int i, j;
322 char ebuf[15] = "Escape-Char";
323 char cbuf[50] = "\n\r";
324
325 if (term_escape_char > 0 && term_escape_char < 26) {
326 snprintf(cbuf, sizeof(cbuf), "\n\r");
327 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
328 } else {
329 snprintf(cbuf, sizeof(cbuf),
330 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
331 term_escape_char);
332 }
333 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
334 for (i = 0; mux_help[i] != NULL; i++) {
335 for (j=0; mux_help[i][j] != '\0'; j++) {
336 if (mux_help[i][j] == '%')
337 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
338 else
339 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
340 }
341 }
342 }
343
344 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
345 {
346 if (d->chr_event[mux_nr])
347 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
348 }
349
350 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
351 {
352 if (d->term_got_escape) {
353 d->term_got_escape = 0;
354 if (ch == term_escape_char)
355 goto send_char;
356 switch(ch) {
357 case '?':
358 case 'h':
359 mux_print_help(chr);
360 break;
361 case 'x':
362 {
363 const char *term = "QEMU: Terminated\n\r";
364 chr->chr_write(chr,(uint8_t *)term,strlen(term));
365 exit(0);
366 break;
367 }
368 case 's':
369 bdrv_commit_all();
370 break;
371 case 'b':
372 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
373 break;
374 case 'c':
375 /* Switch to the next registered device */
376 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
377 d->focus++;
378 if (d->focus >= d->mux_cnt)
379 d->focus = 0;
380 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
381 break;
382 case 't':
383 d->timestamps = !d->timestamps;
384 d->timestamps_start = -1;
385 d->linestart = 0;
386 break;
387 }
388 } else if (ch == term_escape_char) {
389 d->term_got_escape = 1;
390 } else {
391 send_char:
392 return 1;
393 }
394 return 0;
395 }
396
397 static void mux_chr_accept_input(CharDriverState *chr)
398 {
399 MuxDriver *d = chr->opaque;
400 int m = d->focus;
401
402 while (d->prod[m] != d->cons[m] &&
403 d->chr_can_read[m] &&
404 d->chr_can_read[m](d->ext_opaque[m])) {
405 d->chr_read[m](d->ext_opaque[m],
406 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
407 }
408 }
409
410 static int mux_chr_can_read(void *opaque)
411 {
412 CharDriverState *chr = opaque;
413 MuxDriver *d = chr->opaque;
414 int m = d->focus;
415
416 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
417 return 1;
418 if (d->chr_can_read[m])
419 return d->chr_can_read[m](d->ext_opaque[m]);
420 return 0;
421 }
422
423 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
424 {
425 CharDriverState *chr = opaque;
426 MuxDriver *d = chr->opaque;
427 int m = d->focus;
428 int i;
429
430 mux_chr_accept_input (opaque);
431
432 for(i = 0; i < size; i++)
433 if (mux_proc_byte(chr, d, buf[i])) {
434 if (d->prod[m] == d->cons[m] &&
435 d->chr_can_read[m] &&
436 d->chr_can_read[m](d->ext_opaque[m]))
437 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
438 else
439 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
440 }
441 }
442
443 static void mux_chr_event(void *opaque, int event)
444 {
445 CharDriverState *chr = opaque;
446 MuxDriver *d = chr->opaque;
447 int i;
448
449 /* Send the event to all registered listeners */
450 for (i = 0; i < d->mux_cnt; i++)
451 mux_chr_send_event(d, i, event);
452 }
453
454 static void mux_chr_update_read_handler(CharDriverState *chr)
455 {
456 MuxDriver *d = chr->opaque;
457
458 if (d->mux_cnt >= MAX_MUX) {
459 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
460 return;
461 }
462 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
463 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
464 d->chr_read[d->mux_cnt] = chr->chr_read;
465 d->chr_event[d->mux_cnt] = chr->chr_event;
466 /* Fix up the real driver with mux routines */
467 if (d->mux_cnt == 0) {
468 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
469 mux_chr_event, chr);
470 }
471 if (d->focus != -1) {
472 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
473 }
474 d->focus = d->mux_cnt;
475 d->mux_cnt++;
476 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
477 }
478
479 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
480 {
481 CharDriverState *chr;
482 MuxDriver *d;
483
484 chr = g_malloc0(sizeof(CharDriverState));
485 d = g_malloc0(sizeof(MuxDriver));
486
487 chr->opaque = d;
488 d->drv = drv;
489 d->focus = -1;
490 chr->chr_write = mux_chr_write;
491 chr->chr_update_read_handler = mux_chr_update_read_handler;
492 chr->chr_accept_input = mux_chr_accept_input;
493 /* Frontend guest-open / -close notification is not support with muxes */
494 chr->chr_set_fe_open = NULL;
495
496 return chr;
497 }
498
499
500 #ifdef _WIN32
501 int send_all(int fd, const void *buf, int len1)
502 {
503 int ret, len;
504
505 len = len1;
506 while (len > 0) {
507 ret = send(fd, buf, len, 0);
508 if (ret < 0) {
509 errno = WSAGetLastError();
510 if (errno != WSAEWOULDBLOCK) {
511 return -1;
512 }
513 } else if (ret == 0) {
514 break;
515 } else {
516 buf += ret;
517 len -= ret;
518 }
519 }
520 return len1 - len;
521 }
522
523 #else
524
525 int send_all(int fd, const void *_buf, int len1)
526 {
527 int ret, len;
528 const uint8_t *buf = _buf;
529
530 len = len1;
531 while (len > 0) {
532 ret = write(fd, buf, len);
533 if (ret < 0) {
534 if (errno != EINTR && errno != EAGAIN)
535 return -1;
536 } else if (ret == 0) {
537 break;
538 } else {
539 buf += ret;
540 len -= ret;
541 }
542 }
543 return len1 - len;
544 }
545
546 int recv_all(int fd, void *_buf, int len1, bool single_read)
547 {
548 int ret, len;
549 uint8_t *buf = _buf;
550
551 len = len1;
552 while ((len > 0) && (ret = read(fd, buf, len)) != 0) {
553 if (ret < 0) {
554 if (errno != EINTR && errno != EAGAIN) {
555 return -1;
556 }
557 continue;
558 } else {
559 if (single_read) {
560 return ret;
561 }
562 buf += ret;
563 len -= ret;
564 }
565 }
566 return len1 - len;
567 }
568
569 #endif /* !_WIN32 */
570
571 typedef struct IOWatchPoll
572 {
573 GSource parent;
574
575 GIOChannel *channel;
576 GSource *src;
577
578 IOCanReadHandler *fd_can_read;
579 GSourceFunc fd_read;
580 void *opaque;
581 } IOWatchPoll;
582
583 static IOWatchPoll *io_watch_poll_from_source(GSource *source)
584 {
585 return container_of(source, IOWatchPoll, parent);
586 }
587
588 static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_)
589 {
590 IOWatchPoll *iwp = io_watch_poll_from_source(source);
591 bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
592 bool was_active = iwp->src != NULL;
593 if (was_active == now_active) {
594 return FALSE;
595 }
596
597 if (now_active) {
598 iwp->src = g_io_create_watch(iwp->channel, G_IO_IN | G_IO_ERR | G_IO_HUP);
599 g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
600 g_source_attach(iwp->src, NULL);
601 } else {
602 g_source_destroy(iwp->src);
603 g_source_unref(iwp->src);
604 iwp->src = NULL;
605 }
606 return FALSE;
607 }
608
609 static gboolean io_watch_poll_check(GSource *source)
610 {
611 return FALSE;
612 }
613
614 static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
615 gpointer user_data)
616 {
617 abort();
618 }
619
620 static void io_watch_poll_finalize(GSource *source)
621 {
622 /* Due to a glib bug, removing the last reference to a source
623 * inside a finalize callback causes recursive locking (and a
624 * deadlock). This is not a problem inside other callbacks,
625 * including dispatch callbacks, so we call io_remove_watch_poll
626 * to remove this source. At this point, iwp->src must
627 * be NULL, or we would leak it.
628 *
629 * This would be solved much more elegantly by child sources,
630 * but we support older glib versions that do not have them.
631 */
632 IOWatchPoll *iwp = io_watch_poll_from_source(source);
633 assert(iwp->src == NULL);
634 }
635
636 static GSourceFuncs io_watch_poll_funcs = {
637 .prepare = io_watch_poll_prepare,
638 .check = io_watch_poll_check,
639 .dispatch = io_watch_poll_dispatch,
640 .finalize = io_watch_poll_finalize,
641 };
642
643 /* Can only be used for read */
644 static guint io_add_watch_poll(GIOChannel *channel,
645 IOCanReadHandler *fd_can_read,
646 GIOFunc fd_read,
647 gpointer user_data)
648 {
649 IOWatchPoll *iwp;
650 int tag;
651
652 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll));
653 iwp->fd_can_read = fd_can_read;
654 iwp->opaque = user_data;
655 iwp->channel = channel;
656 iwp->fd_read = (GSourceFunc) fd_read;
657 iwp->src = NULL;
658
659 tag = g_source_attach(&iwp->parent, NULL);
660 g_source_unref(&iwp->parent);
661 return tag;
662 }
663
664 static void io_remove_watch_poll(guint tag)
665 {
666 GSource *source;
667 IOWatchPoll *iwp;
668
669 g_return_if_fail (tag > 0);
670
671 source = g_main_context_find_source_by_id(NULL, tag);
672 g_return_if_fail (source != NULL);
673
674 iwp = io_watch_poll_from_source(source);
675 if (iwp->src) {
676 g_source_destroy(iwp->src);
677 g_source_unref(iwp->src);
678 iwp->src = NULL;
679 }
680 g_source_destroy(&iwp->parent);
681 }
682
683 #ifndef _WIN32
684 static GIOChannel *io_channel_from_fd(int fd)
685 {
686 GIOChannel *chan;
687
688 if (fd == -1) {
689 return NULL;
690 }
691
692 chan = g_io_channel_unix_new(fd);
693
694 g_io_channel_set_encoding(chan, NULL, NULL);
695 g_io_channel_set_buffered(chan, FALSE);
696
697 return chan;
698 }
699 #endif
700
701 static GIOChannel *io_channel_from_socket(int fd)
702 {
703 GIOChannel *chan;
704
705 if (fd == -1) {
706 return NULL;
707 }
708
709 #ifdef _WIN32
710 chan = g_io_channel_win32_new_socket(fd);
711 #else
712 chan = g_io_channel_unix_new(fd);
713 #endif
714
715 g_io_channel_set_encoding(chan, NULL, NULL);
716 g_io_channel_set_buffered(chan, FALSE);
717
718 return chan;
719 }
720
721 static int io_channel_send(GIOChannel *fd, const void *buf, size_t len)
722 {
723 size_t offset = 0;
724 GIOStatus status = G_IO_STATUS_NORMAL;
725
726 while (offset < len && status == G_IO_STATUS_NORMAL) {
727 gsize bytes_written = 0;
728
729 status = g_io_channel_write_chars(fd, buf + offset, len - offset,
730 &bytes_written, NULL);
731 offset += bytes_written;
732 }
733
734 if (offset > 0) {
735 return offset;
736 }
737 switch (status) {
738 case G_IO_STATUS_NORMAL:
739 g_assert(len == 0);
740 return 0;
741 case G_IO_STATUS_AGAIN:
742 errno = EAGAIN;
743 return -1;
744 default:
745 break;
746 }
747 errno = EINVAL;
748 return -1;
749 }
750
751 #ifndef _WIN32
752
753 typedef struct FDCharDriver {
754 CharDriverState *chr;
755 GIOChannel *fd_in, *fd_out;
756 guint fd_in_tag;
757 int max_size;
758 QTAILQ_ENTRY(FDCharDriver) node;
759 } FDCharDriver;
760
761 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
762 {
763 FDCharDriver *s = chr->opaque;
764
765 return io_channel_send(s->fd_out, buf, len);
766 }
767
768 static gboolean fd_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
769 {
770 CharDriverState *chr = opaque;
771 FDCharDriver *s = chr->opaque;
772 int len;
773 uint8_t buf[READ_BUF_LEN];
774 GIOStatus status;
775 gsize bytes_read;
776
777 len = sizeof(buf);
778 if (len > s->max_size) {
779 len = s->max_size;
780 }
781 if (len == 0) {
782 return TRUE;
783 }
784
785 status = g_io_channel_read_chars(chan, (gchar *)buf,
786 len, &bytes_read, NULL);
787 if (status == G_IO_STATUS_EOF) {
788 if (s->fd_in_tag) {
789 io_remove_watch_poll(s->fd_in_tag);
790 s->fd_in_tag = 0;
791 }
792 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
793 return FALSE;
794 }
795 if (status == G_IO_STATUS_NORMAL) {
796 qemu_chr_be_write(chr, buf, bytes_read);
797 }
798
799 return TRUE;
800 }
801
802 static int fd_chr_read_poll(void *opaque)
803 {
804 CharDriverState *chr = opaque;
805 FDCharDriver *s = chr->opaque;
806
807 s->max_size = qemu_chr_be_can_write(chr);
808 return s->max_size;
809 }
810
811 static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
812 {
813 FDCharDriver *s = chr->opaque;
814 return g_io_create_watch(s->fd_out, cond);
815 }
816
817 static void fd_chr_update_read_handler(CharDriverState *chr)
818 {
819 FDCharDriver *s = chr->opaque;
820
821 if (s->fd_in_tag) {
822 io_remove_watch_poll(s->fd_in_tag);
823 s->fd_in_tag = 0;
824 }
825
826 if (s->fd_in) {
827 s->fd_in_tag = io_add_watch_poll(s->fd_in, fd_chr_read_poll, fd_chr_read, chr);
828 }
829 }
830
831 static void fd_chr_close(struct CharDriverState *chr)
832 {
833 FDCharDriver *s = chr->opaque;
834
835 if (s->fd_in_tag) {
836 io_remove_watch_poll(s->fd_in_tag);
837 s->fd_in_tag = 0;
838 }
839
840 if (s->fd_in) {
841 g_io_channel_unref(s->fd_in);
842 }
843 if (s->fd_out) {
844 g_io_channel_unref(s->fd_out);
845 }
846
847 g_free(s);
848 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
849 }
850
851 /* open a character device to a unix fd */
852 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
853 {
854 CharDriverState *chr;
855 FDCharDriver *s;
856
857 chr = g_malloc0(sizeof(CharDriverState));
858 s = g_malloc0(sizeof(FDCharDriver));
859 s->fd_in = io_channel_from_fd(fd_in);
860 s->fd_out = io_channel_from_fd(fd_out);
861 fcntl(fd_out, F_SETFL, O_NONBLOCK);
862 s->chr = chr;
863 chr->opaque = s;
864 chr->chr_add_watch = fd_chr_add_watch;
865 chr->chr_write = fd_chr_write;
866 chr->chr_update_read_handler = fd_chr_update_read_handler;
867 chr->chr_close = fd_chr_close;
868
869 return chr;
870 }
871
872 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
873 {
874 int fd_in, fd_out;
875 char filename_in[256], filename_out[256];
876 const char *filename = opts->device;
877
878 if (filename == NULL) {
879 fprintf(stderr, "chardev: pipe: no filename given\n");
880 return NULL;
881 }
882
883 snprintf(filename_in, 256, "%s.in", filename);
884 snprintf(filename_out, 256, "%s.out", filename);
885 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
886 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
887 if (fd_in < 0 || fd_out < 0) {
888 if (fd_in >= 0)
889 close(fd_in);
890 if (fd_out >= 0)
891 close(fd_out);
892 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
893 if (fd_in < 0) {
894 return NULL;
895 }
896 }
897 return qemu_chr_open_fd(fd_in, fd_out);
898 }
899
900 /* init terminal so that we can grab keys */
901 static struct termios oldtty;
902 static int old_fd0_flags;
903 static bool stdio_allow_signal;
904
905 static void term_exit(void)
906 {
907 tcsetattr (0, TCSANOW, &oldtty);
908 fcntl(0, F_SETFL, old_fd0_flags);
909 }
910
911 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
912 {
913 struct termios tty;
914
915 tty = oldtty;
916 if (!echo) {
917 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
918 |INLCR|IGNCR|ICRNL|IXON);
919 tty.c_oflag |= OPOST;
920 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
921 tty.c_cflag &= ~(CSIZE|PARENB);
922 tty.c_cflag |= CS8;
923 tty.c_cc[VMIN] = 1;
924 tty.c_cc[VTIME] = 0;
925 }
926 if (!stdio_allow_signal)
927 tty.c_lflag &= ~ISIG;
928
929 tcsetattr (0, TCSANOW, &tty);
930 }
931
932 static void qemu_chr_close_stdio(struct CharDriverState *chr)
933 {
934 term_exit();
935 fd_chr_close(chr);
936 }
937
938 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
939 {
940 CharDriverState *chr;
941
942 if (is_daemonized()) {
943 error_report("cannot use stdio with -daemonize");
944 return NULL;
945 }
946 old_fd0_flags = fcntl(0, F_GETFL);
947 tcgetattr (0, &oldtty);
948 fcntl(0, F_SETFL, O_NONBLOCK);
949 atexit(term_exit);
950
951 chr = qemu_chr_open_fd(0, 1);
952 chr->chr_close = qemu_chr_close_stdio;
953 chr->chr_set_echo = qemu_chr_set_echo_stdio;
954 if (opts->has_signal) {
955 stdio_allow_signal = opts->signal;
956 }
957 qemu_chr_fe_set_echo(chr, false);
958
959 return chr;
960 }
961
962 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
963 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
964 || defined(__GLIBC__)
965
966 #define HAVE_CHARDEV_TTY 1
967
968 typedef struct {
969 GIOChannel *fd;
970 guint fd_tag;
971 int connected;
972 int read_bytes;
973 guint timer_tag;
974 } PtyCharDriver;
975
976 static void pty_chr_update_read_handler(CharDriverState *chr);
977 static void pty_chr_state(CharDriverState *chr, int connected);
978
979 static gboolean pty_chr_timer(gpointer opaque)
980 {
981 struct CharDriverState *chr = opaque;
982 PtyCharDriver *s = chr->opaque;
983
984 if (s->connected) {
985 goto out;
986 }
987
988 /* Next poll ... */
989 pty_chr_update_read_handler(chr);
990
991 out:
992 s->timer_tag = 0;
993 return FALSE;
994 }
995
996 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
997 {
998 PtyCharDriver *s = chr->opaque;
999
1000 if (s->timer_tag) {
1001 g_source_remove(s->timer_tag);
1002 s->timer_tag = 0;
1003 }
1004
1005 if (ms == 1000) {
1006 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1007 } else {
1008 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1009 }
1010 }
1011
1012 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1013 {
1014 PtyCharDriver *s = chr->opaque;
1015
1016 if (!s->connected) {
1017 /* guest sends data, check for (re-)connect */
1018 pty_chr_update_read_handler(chr);
1019 return 0;
1020 }
1021 return io_channel_send(s->fd, buf, len);
1022 }
1023
1024 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1025 {
1026 PtyCharDriver *s = chr->opaque;
1027 return g_io_create_watch(s->fd, cond);
1028 }
1029
1030 static int pty_chr_read_poll(void *opaque)
1031 {
1032 CharDriverState *chr = opaque;
1033 PtyCharDriver *s = chr->opaque;
1034
1035 s->read_bytes = qemu_chr_be_can_write(chr);
1036 return s->read_bytes;
1037 }
1038
1039 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1040 {
1041 CharDriverState *chr = opaque;
1042 PtyCharDriver *s = chr->opaque;
1043 gsize size, len;
1044 uint8_t buf[READ_BUF_LEN];
1045 GIOStatus status;
1046
1047 len = sizeof(buf);
1048 if (len > s->read_bytes)
1049 len = s->read_bytes;
1050 if (len == 0) {
1051 return TRUE;
1052 }
1053 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1054 if (status != G_IO_STATUS_NORMAL) {
1055 pty_chr_state(chr, 0);
1056 return FALSE;
1057 } else {
1058 pty_chr_state(chr, 1);
1059 qemu_chr_be_write(chr, buf, size);
1060 }
1061 return TRUE;
1062 }
1063
1064 static void pty_chr_update_read_handler(CharDriverState *chr)
1065 {
1066 PtyCharDriver *s = chr->opaque;
1067 GPollFD pfd;
1068
1069 pfd.fd = g_io_channel_unix_get_fd(s->fd);
1070 pfd.events = G_IO_OUT;
1071 pfd.revents = 0;
1072 g_poll(&pfd, 1, 0);
1073 if (pfd.revents & G_IO_HUP) {
1074 pty_chr_state(chr, 0);
1075 } else {
1076 pty_chr_state(chr, 1);
1077 }
1078 }
1079
1080 static void pty_chr_state(CharDriverState *chr, int connected)
1081 {
1082 PtyCharDriver *s = chr->opaque;
1083
1084 if (!connected) {
1085 if (s->fd_tag) {
1086 io_remove_watch_poll(s->fd_tag);
1087 s->fd_tag = 0;
1088 }
1089 s->connected = 0;
1090 /* (re-)connect poll interval for idle guests: once per second.
1091 * We check more frequently in case the guests sends data to
1092 * the virtual device linked to our pty. */
1093 pty_chr_rearm_timer(chr, 1000);
1094 } else {
1095 if (s->timer_tag) {
1096 g_source_remove(s->timer_tag);
1097 s->timer_tag = 0;
1098 }
1099 if (!s->connected) {
1100 qemu_chr_be_generic_open(chr);
1101 s->connected = 1;
1102 s->fd_tag = io_add_watch_poll(s->fd, pty_chr_read_poll, pty_chr_read, chr);
1103 }
1104 }
1105 }
1106
1107
1108 static void pty_chr_close(struct CharDriverState *chr)
1109 {
1110 PtyCharDriver *s = chr->opaque;
1111 int fd;
1112
1113 if (s->fd_tag) {
1114 io_remove_watch_poll(s->fd_tag);
1115 s->fd_tag = 0;
1116 }
1117 fd = g_io_channel_unix_get_fd(s->fd);
1118 g_io_channel_unref(s->fd);
1119 close(fd);
1120 if (s->timer_tag) {
1121 g_source_remove(s->timer_tag);
1122 s->timer_tag = 0;
1123 }
1124 g_free(s);
1125 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1126 }
1127
1128 static CharDriverState *qemu_chr_open_pty(const char *id,
1129 ChardevReturn *ret)
1130 {
1131 CharDriverState *chr;
1132 PtyCharDriver *s;
1133 int master_fd, slave_fd;
1134 char pty_name[PATH_MAX];
1135
1136 master_fd = qemu_openpty_raw(&slave_fd, pty_name);
1137 if (master_fd < 0) {
1138 return NULL;
1139 }
1140
1141 close(slave_fd);
1142
1143 chr = g_malloc0(sizeof(CharDriverState));
1144
1145 chr->filename = g_strdup_printf("pty:%s", pty_name);
1146 ret->pty = g_strdup(pty_name);
1147 ret->has_pty = true;
1148
1149 fprintf(stderr, "char device redirected to %s (label %s)\n",
1150 pty_name, id);
1151
1152 s = g_malloc0(sizeof(PtyCharDriver));
1153 chr->opaque = s;
1154 chr->chr_write = pty_chr_write;
1155 chr->chr_update_read_handler = pty_chr_update_read_handler;
1156 chr->chr_close = pty_chr_close;
1157 chr->chr_add_watch = pty_chr_add_watch;
1158 chr->explicit_be_open = true;
1159
1160 s->fd = io_channel_from_fd(master_fd);
1161 s->timer_tag = 0;
1162
1163 return chr;
1164 }
1165
1166 static void tty_serial_init(int fd, int speed,
1167 int parity, int data_bits, int stop_bits)
1168 {
1169 struct termios tty;
1170 speed_t spd;
1171
1172 #if 0
1173 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1174 speed, parity, data_bits, stop_bits);
1175 #endif
1176 tcgetattr (fd, &tty);
1177
1178 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1179 speed = speed * 10 / 11;
1180 do {
1181 check_speed(50);
1182 check_speed(75);
1183 check_speed(110);
1184 check_speed(134);
1185 check_speed(150);
1186 check_speed(200);
1187 check_speed(300);
1188 check_speed(600);
1189 check_speed(1200);
1190 check_speed(1800);
1191 check_speed(2400);
1192 check_speed(4800);
1193 check_speed(9600);
1194 check_speed(19200);
1195 check_speed(38400);
1196 /* Non-Posix values follow. They may be unsupported on some systems. */
1197 check_speed(57600);
1198 check_speed(115200);
1199 #ifdef B230400
1200 check_speed(230400);
1201 #endif
1202 #ifdef B460800
1203 check_speed(460800);
1204 #endif
1205 #ifdef B500000
1206 check_speed(500000);
1207 #endif
1208 #ifdef B576000
1209 check_speed(576000);
1210 #endif
1211 #ifdef B921600
1212 check_speed(921600);
1213 #endif
1214 #ifdef B1000000
1215 check_speed(1000000);
1216 #endif
1217 #ifdef B1152000
1218 check_speed(1152000);
1219 #endif
1220 #ifdef B1500000
1221 check_speed(1500000);
1222 #endif
1223 #ifdef B2000000
1224 check_speed(2000000);
1225 #endif
1226 #ifdef B2500000
1227 check_speed(2500000);
1228 #endif
1229 #ifdef B3000000
1230 check_speed(3000000);
1231 #endif
1232 #ifdef B3500000
1233 check_speed(3500000);
1234 #endif
1235 #ifdef B4000000
1236 check_speed(4000000);
1237 #endif
1238 spd = B115200;
1239 } while (0);
1240
1241 cfsetispeed(&tty, spd);
1242 cfsetospeed(&tty, spd);
1243
1244 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1245 |INLCR|IGNCR|ICRNL|IXON);
1246 tty.c_oflag |= OPOST;
1247 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1248 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1249 switch(data_bits) {
1250 default:
1251 case 8:
1252 tty.c_cflag |= CS8;
1253 break;
1254 case 7:
1255 tty.c_cflag |= CS7;
1256 break;
1257 case 6:
1258 tty.c_cflag |= CS6;
1259 break;
1260 case 5:
1261 tty.c_cflag |= CS5;
1262 break;
1263 }
1264 switch(parity) {
1265 default:
1266 case 'N':
1267 break;
1268 case 'E':
1269 tty.c_cflag |= PARENB;
1270 break;
1271 case 'O':
1272 tty.c_cflag |= PARENB | PARODD;
1273 break;
1274 }
1275 if (stop_bits == 2)
1276 tty.c_cflag |= CSTOPB;
1277
1278 tcsetattr (fd, TCSANOW, &tty);
1279 }
1280
1281 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1282 {
1283 FDCharDriver *s = chr->opaque;
1284
1285 switch(cmd) {
1286 case CHR_IOCTL_SERIAL_SET_PARAMS:
1287 {
1288 QEMUSerialSetParams *ssp = arg;
1289 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1290 ssp->speed, ssp->parity,
1291 ssp->data_bits, ssp->stop_bits);
1292 }
1293 break;
1294 case CHR_IOCTL_SERIAL_SET_BREAK:
1295 {
1296 int enable = *(int *)arg;
1297 if (enable) {
1298 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1299 }
1300 }
1301 break;
1302 case CHR_IOCTL_SERIAL_GET_TIOCM:
1303 {
1304 int sarg = 0;
1305 int *targ = (int *)arg;
1306 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1307 *targ = 0;
1308 if (sarg & TIOCM_CTS)
1309 *targ |= CHR_TIOCM_CTS;
1310 if (sarg & TIOCM_CAR)
1311 *targ |= CHR_TIOCM_CAR;
1312 if (sarg & TIOCM_DSR)
1313 *targ |= CHR_TIOCM_DSR;
1314 if (sarg & TIOCM_RI)
1315 *targ |= CHR_TIOCM_RI;
1316 if (sarg & TIOCM_DTR)
1317 *targ |= CHR_TIOCM_DTR;
1318 if (sarg & TIOCM_RTS)
1319 *targ |= CHR_TIOCM_RTS;
1320 }
1321 break;
1322 case CHR_IOCTL_SERIAL_SET_TIOCM:
1323 {
1324 int sarg = *(int *)arg;
1325 int targ = 0;
1326 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1327 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1328 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1329 if (sarg & CHR_TIOCM_CTS)
1330 targ |= TIOCM_CTS;
1331 if (sarg & CHR_TIOCM_CAR)
1332 targ |= TIOCM_CAR;
1333 if (sarg & CHR_TIOCM_DSR)
1334 targ |= TIOCM_DSR;
1335 if (sarg & CHR_TIOCM_RI)
1336 targ |= TIOCM_RI;
1337 if (sarg & CHR_TIOCM_DTR)
1338 targ |= TIOCM_DTR;
1339 if (sarg & CHR_TIOCM_RTS)
1340 targ |= TIOCM_RTS;
1341 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1342 }
1343 break;
1344 default:
1345 return -ENOTSUP;
1346 }
1347 return 0;
1348 }
1349
1350 static void qemu_chr_close_tty(CharDriverState *chr)
1351 {
1352 FDCharDriver *s = chr->opaque;
1353 int fd = -1;
1354
1355 if (s) {
1356 fd = g_io_channel_unix_get_fd(s->fd_in);
1357 }
1358
1359 fd_chr_close(chr);
1360
1361 if (fd >= 0) {
1362 close(fd);
1363 }
1364 }
1365
1366 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1367 {
1368 CharDriverState *chr;
1369
1370 tty_serial_init(fd, 115200, 'N', 8, 1);
1371 chr = qemu_chr_open_fd(fd, fd);
1372 chr->chr_ioctl = tty_serial_ioctl;
1373 chr->chr_close = qemu_chr_close_tty;
1374 return chr;
1375 }
1376 #endif /* __linux__ || __sun__ */
1377
1378 #if defined(__linux__)
1379
1380 #define HAVE_CHARDEV_PARPORT 1
1381
1382 typedef struct {
1383 int fd;
1384 int mode;
1385 } ParallelCharDriver;
1386
1387 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1388 {
1389 if (s->mode != mode) {
1390 int m = mode;
1391 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1392 return 0;
1393 s->mode = mode;
1394 }
1395 return 1;
1396 }
1397
1398 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1399 {
1400 ParallelCharDriver *drv = chr->opaque;
1401 int fd = drv->fd;
1402 uint8_t b;
1403
1404 switch(cmd) {
1405 case CHR_IOCTL_PP_READ_DATA:
1406 if (ioctl(fd, PPRDATA, &b) < 0)
1407 return -ENOTSUP;
1408 *(uint8_t *)arg = b;
1409 break;
1410 case CHR_IOCTL_PP_WRITE_DATA:
1411 b = *(uint8_t *)arg;
1412 if (ioctl(fd, PPWDATA, &b) < 0)
1413 return -ENOTSUP;
1414 break;
1415 case CHR_IOCTL_PP_READ_CONTROL:
1416 if (ioctl(fd, PPRCONTROL, &b) < 0)
1417 return -ENOTSUP;
1418 /* Linux gives only the lowest bits, and no way to know data
1419 direction! For better compatibility set the fixed upper
1420 bits. */
1421 *(uint8_t *)arg = b | 0xc0;
1422 break;
1423 case CHR_IOCTL_PP_WRITE_CONTROL:
1424 b = *(uint8_t *)arg;
1425 if (ioctl(fd, PPWCONTROL, &b) < 0)
1426 return -ENOTSUP;
1427 break;
1428 case CHR_IOCTL_PP_READ_STATUS:
1429 if (ioctl(fd, PPRSTATUS, &b) < 0)
1430 return -ENOTSUP;
1431 *(uint8_t *)arg = b;
1432 break;
1433 case CHR_IOCTL_PP_DATA_DIR:
1434 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1435 return -ENOTSUP;
1436 break;
1437 case CHR_IOCTL_PP_EPP_READ_ADDR:
1438 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1439 struct ParallelIOArg *parg = arg;
1440 int n = read(fd, parg->buffer, parg->count);
1441 if (n != parg->count) {
1442 return -EIO;
1443 }
1444 }
1445 break;
1446 case CHR_IOCTL_PP_EPP_READ:
1447 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1448 struct ParallelIOArg *parg = arg;
1449 int n = read(fd, parg->buffer, parg->count);
1450 if (n != parg->count) {
1451 return -EIO;
1452 }
1453 }
1454 break;
1455 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1456 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1457 struct ParallelIOArg *parg = arg;
1458 int n = write(fd, parg->buffer, parg->count);
1459 if (n != parg->count) {
1460 return -EIO;
1461 }
1462 }
1463 break;
1464 case CHR_IOCTL_PP_EPP_WRITE:
1465 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1466 struct ParallelIOArg *parg = arg;
1467 int n = write(fd, parg->buffer, parg->count);
1468 if (n != parg->count) {
1469 return -EIO;
1470 }
1471 }
1472 break;
1473 default:
1474 return -ENOTSUP;
1475 }
1476 return 0;
1477 }
1478
1479 static void pp_close(CharDriverState *chr)
1480 {
1481 ParallelCharDriver *drv = chr->opaque;
1482 int fd = drv->fd;
1483
1484 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1485 ioctl(fd, PPRELEASE);
1486 close(fd);
1487 g_free(drv);
1488 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1489 }
1490
1491 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1492 {
1493 CharDriverState *chr;
1494 ParallelCharDriver *drv;
1495
1496 if (ioctl(fd, PPCLAIM) < 0) {
1497 close(fd);
1498 return NULL;
1499 }
1500
1501 drv = g_malloc0(sizeof(ParallelCharDriver));
1502 drv->fd = fd;
1503 drv->mode = IEEE1284_MODE_COMPAT;
1504
1505 chr = g_malloc0(sizeof(CharDriverState));
1506 chr->chr_write = null_chr_write;
1507 chr->chr_ioctl = pp_ioctl;
1508 chr->chr_close = pp_close;
1509 chr->opaque = drv;
1510
1511 return chr;
1512 }
1513 #endif /* __linux__ */
1514
1515 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1516
1517 #define HAVE_CHARDEV_PARPORT 1
1518
1519 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1520 {
1521 int fd = (int)(intptr_t)chr->opaque;
1522 uint8_t b;
1523
1524 switch(cmd) {
1525 case CHR_IOCTL_PP_READ_DATA:
1526 if (ioctl(fd, PPIGDATA, &b) < 0)
1527 return -ENOTSUP;
1528 *(uint8_t *)arg = b;
1529 break;
1530 case CHR_IOCTL_PP_WRITE_DATA:
1531 b = *(uint8_t *)arg;
1532 if (ioctl(fd, PPISDATA, &b) < 0)
1533 return -ENOTSUP;
1534 break;
1535 case CHR_IOCTL_PP_READ_CONTROL:
1536 if (ioctl(fd, PPIGCTRL, &b) < 0)
1537 return -ENOTSUP;
1538 *(uint8_t *)arg = b;
1539 break;
1540 case CHR_IOCTL_PP_WRITE_CONTROL:
1541 b = *(uint8_t *)arg;
1542 if (ioctl(fd, PPISCTRL, &b) < 0)
1543 return -ENOTSUP;
1544 break;
1545 case CHR_IOCTL_PP_READ_STATUS:
1546 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1547 return -ENOTSUP;
1548 *(uint8_t *)arg = b;
1549 break;
1550 default:
1551 return -ENOTSUP;
1552 }
1553 return 0;
1554 }
1555
1556 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1557 {
1558 CharDriverState *chr;
1559
1560 chr = g_malloc0(sizeof(CharDriverState));
1561 chr->opaque = (void *)(intptr_t)fd;
1562 chr->chr_write = null_chr_write;
1563 chr->chr_ioctl = pp_ioctl;
1564 chr->explicit_be_open = true;
1565 return chr;
1566 }
1567 #endif
1568
1569 #else /* _WIN32 */
1570
1571 typedef struct {
1572 int max_size;
1573 HANDLE hcom, hrecv, hsend;
1574 OVERLAPPED orecv, osend;
1575 BOOL fpipe;
1576 DWORD len;
1577 } WinCharState;
1578
1579 typedef struct {
1580 HANDLE hStdIn;
1581 HANDLE hInputReadyEvent;
1582 HANDLE hInputDoneEvent;
1583 HANDLE hInputThread;
1584 uint8_t win_stdio_buf;
1585 } WinStdioCharState;
1586
1587 #define NSENDBUF 2048
1588 #define NRECVBUF 2048
1589 #define MAXCONNECT 1
1590 #define NTIMEOUT 5000
1591
1592 static int win_chr_poll(void *opaque);
1593 static int win_chr_pipe_poll(void *opaque);
1594
1595 static void win_chr_close(CharDriverState *chr)
1596 {
1597 WinCharState *s = chr->opaque;
1598
1599 if (s->hsend) {
1600 CloseHandle(s->hsend);
1601 s->hsend = NULL;
1602 }
1603 if (s->hrecv) {
1604 CloseHandle(s->hrecv);
1605 s->hrecv = NULL;
1606 }
1607 if (s->hcom) {
1608 CloseHandle(s->hcom);
1609 s->hcom = NULL;
1610 }
1611 if (s->fpipe)
1612 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1613 else
1614 qemu_del_polling_cb(win_chr_poll, chr);
1615
1616 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1617 }
1618
1619 static int win_chr_init(CharDriverState *chr, const char *filename)
1620 {
1621 WinCharState *s = chr->opaque;
1622 COMMCONFIG comcfg;
1623 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1624 COMSTAT comstat;
1625 DWORD size;
1626 DWORD err;
1627
1628 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1629 if (!s->hsend) {
1630 fprintf(stderr, "Failed CreateEvent\n");
1631 goto fail;
1632 }
1633 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1634 if (!s->hrecv) {
1635 fprintf(stderr, "Failed CreateEvent\n");
1636 goto fail;
1637 }
1638
1639 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1640 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1641 if (s->hcom == INVALID_HANDLE_VALUE) {
1642 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1643 s->hcom = NULL;
1644 goto fail;
1645 }
1646
1647 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1648 fprintf(stderr, "Failed SetupComm\n");
1649 goto fail;
1650 }
1651
1652 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1653 size = sizeof(COMMCONFIG);
1654 GetDefaultCommConfig(filename, &comcfg, &size);
1655 comcfg.dcb.DCBlength = sizeof(DCB);
1656 CommConfigDialog(filename, NULL, &comcfg);
1657
1658 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1659 fprintf(stderr, "Failed SetCommState\n");
1660 goto fail;
1661 }
1662
1663 if (!SetCommMask(s->hcom, EV_ERR)) {
1664 fprintf(stderr, "Failed SetCommMask\n");
1665 goto fail;
1666 }
1667
1668 cto.ReadIntervalTimeout = MAXDWORD;
1669 if (!SetCommTimeouts(s->hcom, &cto)) {
1670 fprintf(stderr, "Failed SetCommTimeouts\n");
1671 goto fail;
1672 }
1673
1674 if (!ClearCommError(s->hcom, &err, &comstat)) {
1675 fprintf(stderr, "Failed ClearCommError\n");
1676 goto fail;
1677 }
1678 qemu_add_polling_cb(win_chr_poll, chr);
1679 return 0;
1680
1681 fail:
1682 win_chr_close(chr);
1683 return -1;
1684 }
1685
1686 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1687 {
1688 WinCharState *s = chr->opaque;
1689 DWORD len, ret, size, err;
1690
1691 len = len1;
1692 ZeroMemory(&s->osend, sizeof(s->osend));
1693 s->osend.hEvent = s->hsend;
1694 while (len > 0) {
1695 if (s->hsend)
1696 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1697 else
1698 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1699 if (!ret) {
1700 err = GetLastError();
1701 if (err == ERROR_IO_PENDING) {
1702 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1703 if (ret) {
1704 buf += size;
1705 len -= size;
1706 } else {
1707 break;
1708 }
1709 } else {
1710 break;
1711 }
1712 } else {
1713 buf += size;
1714 len -= size;
1715 }
1716 }
1717 return len1 - len;
1718 }
1719
1720 static int win_chr_read_poll(CharDriverState *chr)
1721 {
1722 WinCharState *s = chr->opaque;
1723
1724 s->max_size = qemu_chr_be_can_write(chr);
1725 return s->max_size;
1726 }
1727
1728 static void win_chr_readfile(CharDriverState *chr)
1729 {
1730 WinCharState *s = chr->opaque;
1731 int ret, err;
1732 uint8_t buf[READ_BUF_LEN];
1733 DWORD size;
1734
1735 ZeroMemory(&s->orecv, sizeof(s->orecv));
1736 s->orecv.hEvent = s->hrecv;
1737 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1738 if (!ret) {
1739 err = GetLastError();
1740 if (err == ERROR_IO_PENDING) {
1741 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1742 }
1743 }
1744
1745 if (size > 0) {
1746 qemu_chr_be_write(chr, buf, size);
1747 }
1748 }
1749
1750 static void win_chr_read(CharDriverState *chr)
1751 {
1752 WinCharState *s = chr->opaque;
1753
1754 if (s->len > s->max_size)
1755 s->len = s->max_size;
1756 if (s->len == 0)
1757 return;
1758
1759 win_chr_readfile(chr);
1760 }
1761
1762 static int win_chr_poll(void *opaque)
1763 {
1764 CharDriverState *chr = opaque;
1765 WinCharState *s = chr->opaque;
1766 COMSTAT status;
1767 DWORD comerr;
1768
1769 ClearCommError(s->hcom, &comerr, &status);
1770 if (status.cbInQue > 0) {
1771 s->len = status.cbInQue;
1772 win_chr_read_poll(chr);
1773 win_chr_read(chr);
1774 return 1;
1775 }
1776 return 0;
1777 }
1778
1779 static CharDriverState *qemu_chr_open_win_path(const char *filename)
1780 {
1781 CharDriverState *chr;
1782 WinCharState *s;
1783
1784 chr = g_malloc0(sizeof(CharDriverState));
1785 s = g_malloc0(sizeof(WinCharState));
1786 chr->opaque = s;
1787 chr->chr_write = win_chr_write;
1788 chr->chr_close = win_chr_close;
1789
1790 if (win_chr_init(chr, filename) < 0) {
1791 g_free(s);
1792 g_free(chr);
1793 return NULL;
1794 }
1795 return chr;
1796 }
1797
1798 static int win_chr_pipe_poll(void *opaque)
1799 {
1800 CharDriverState *chr = opaque;
1801 WinCharState *s = chr->opaque;
1802 DWORD size;
1803
1804 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1805 if (size > 0) {
1806 s->len = size;
1807 win_chr_read_poll(chr);
1808 win_chr_read(chr);
1809 return 1;
1810 }
1811 return 0;
1812 }
1813
1814 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1815 {
1816 WinCharState *s = chr->opaque;
1817 OVERLAPPED ov;
1818 int ret;
1819 DWORD size;
1820 char openname[256];
1821
1822 s->fpipe = TRUE;
1823
1824 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1825 if (!s->hsend) {
1826 fprintf(stderr, "Failed CreateEvent\n");
1827 goto fail;
1828 }
1829 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1830 if (!s->hrecv) {
1831 fprintf(stderr, "Failed CreateEvent\n");
1832 goto fail;
1833 }
1834
1835 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1836 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1837 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1838 PIPE_WAIT,
1839 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1840 if (s->hcom == INVALID_HANDLE_VALUE) {
1841 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1842 s->hcom = NULL;
1843 goto fail;
1844 }
1845
1846 ZeroMemory(&ov, sizeof(ov));
1847 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1848 ret = ConnectNamedPipe(s->hcom, &ov);
1849 if (ret) {
1850 fprintf(stderr, "Failed ConnectNamedPipe\n");
1851 goto fail;
1852 }
1853
1854 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1855 if (!ret) {
1856 fprintf(stderr, "Failed GetOverlappedResult\n");
1857 if (ov.hEvent) {
1858 CloseHandle(ov.hEvent);
1859 ov.hEvent = NULL;
1860 }
1861 goto fail;
1862 }
1863
1864 if (ov.hEvent) {
1865 CloseHandle(ov.hEvent);
1866 ov.hEvent = NULL;
1867 }
1868 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1869 return 0;
1870
1871 fail:
1872 win_chr_close(chr);
1873 return -1;
1874 }
1875
1876
1877 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
1878 {
1879 const char *filename = opts->device;
1880 CharDriverState *chr;
1881 WinCharState *s;
1882
1883 chr = g_malloc0(sizeof(CharDriverState));
1884 s = g_malloc0(sizeof(WinCharState));
1885 chr->opaque = s;
1886 chr->chr_write = win_chr_write;
1887 chr->chr_close = win_chr_close;
1888
1889 if (win_chr_pipe_init(chr, filename) < 0) {
1890 g_free(s);
1891 g_free(chr);
1892 return NULL;
1893 }
1894 return chr;
1895 }
1896
1897 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1898 {
1899 CharDriverState *chr;
1900 WinCharState *s;
1901
1902 chr = g_malloc0(sizeof(CharDriverState));
1903 s = g_malloc0(sizeof(WinCharState));
1904 s->hcom = fd_out;
1905 chr->opaque = s;
1906 chr->chr_write = win_chr_write;
1907 return chr;
1908 }
1909
1910 static CharDriverState *qemu_chr_open_win_con(void)
1911 {
1912 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1913 }
1914
1915 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1916 {
1917 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1918 DWORD dwSize;
1919 int len1;
1920
1921 len1 = len;
1922
1923 while (len1 > 0) {
1924 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1925 break;
1926 }
1927 buf += dwSize;
1928 len1 -= dwSize;
1929 }
1930
1931 return len - len1;
1932 }
1933
1934 static void win_stdio_wait_func(void *opaque)
1935 {
1936 CharDriverState *chr = opaque;
1937 WinStdioCharState *stdio = chr->opaque;
1938 INPUT_RECORD buf[4];
1939 int ret;
1940 DWORD dwSize;
1941 int i;
1942
1943 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
1944 &dwSize);
1945
1946 if (!ret) {
1947 /* Avoid error storm */
1948 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
1949 return;
1950 }
1951
1952 for (i = 0; i < dwSize; i++) {
1953 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
1954
1955 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
1956 int j;
1957 if (kev->uChar.AsciiChar != 0) {
1958 for (j = 0; j < kev->wRepeatCount; j++) {
1959 if (qemu_chr_be_can_write(chr)) {
1960 uint8_t c = kev->uChar.AsciiChar;
1961 qemu_chr_be_write(chr, &c, 1);
1962 }
1963 }
1964 }
1965 }
1966 }
1967 }
1968
1969 static DWORD WINAPI win_stdio_thread(LPVOID param)
1970 {
1971 CharDriverState *chr = param;
1972 WinStdioCharState *stdio = chr->opaque;
1973 int ret;
1974 DWORD dwSize;
1975
1976 while (1) {
1977
1978 /* Wait for one byte */
1979 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
1980
1981 /* Exit in case of error, continue if nothing read */
1982 if (!ret) {
1983 break;
1984 }
1985 if (!dwSize) {
1986 continue;
1987 }
1988
1989 /* Some terminal emulator returns \r\n for Enter, just pass \n */
1990 if (stdio->win_stdio_buf == '\r') {
1991 continue;
1992 }
1993
1994 /* Signal the main thread and wait until the byte was eaten */
1995 if (!SetEvent(stdio->hInputReadyEvent)) {
1996 break;
1997 }
1998 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
1999 != WAIT_OBJECT_0) {
2000 break;
2001 }
2002 }
2003
2004 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2005 return 0;
2006 }
2007
2008 static void win_stdio_thread_wait_func(void *opaque)
2009 {
2010 CharDriverState *chr = opaque;
2011 WinStdioCharState *stdio = chr->opaque;
2012
2013 if (qemu_chr_be_can_write(chr)) {
2014 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2015 }
2016
2017 SetEvent(stdio->hInputDoneEvent);
2018 }
2019
2020 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2021 {
2022 WinStdioCharState *stdio = chr->opaque;
2023 DWORD dwMode = 0;
2024
2025 GetConsoleMode(stdio->hStdIn, &dwMode);
2026
2027 if (echo) {
2028 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2029 } else {
2030 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2031 }
2032 }
2033
2034 static void win_stdio_close(CharDriverState *chr)
2035 {
2036 WinStdioCharState *stdio = chr->opaque;
2037
2038 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2039 CloseHandle(stdio->hInputReadyEvent);
2040 }
2041 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2042 CloseHandle(stdio->hInputDoneEvent);
2043 }
2044 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2045 TerminateThread(stdio->hInputThread, 0);
2046 }
2047
2048 g_free(chr->opaque);
2049 g_free(chr);
2050 }
2051
2052 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
2053 {
2054 CharDriverState *chr;
2055 WinStdioCharState *stdio;
2056 DWORD dwMode;
2057 int is_console = 0;
2058
2059 chr = g_malloc0(sizeof(CharDriverState));
2060 stdio = g_malloc0(sizeof(WinStdioCharState));
2061
2062 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2063 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2064 fprintf(stderr, "cannot open stdio: invalid handle\n");
2065 exit(1);
2066 }
2067
2068 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2069
2070 chr->opaque = stdio;
2071 chr->chr_write = win_stdio_write;
2072 chr->chr_close = win_stdio_close;
2073
2074 if (is_console) {
2075 if (qemu_add_wait_object(stdio->hStdIn,
2076 win_stdio_wait_func, chr)) {
2077 fprintf(stderr, "qemu_add_wait_object: failed\n");
2078 }
2079 } else {
2080 DWORD dwId;
2081
2082 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2083 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2084 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2085 chr, 0, &dwId);
2086
2087 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2088 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2089 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2090 fprintf(stderr, "cannot create stdio thread or event\n");
2091 exit(1);
2092 }
2093 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2094 win_stdio_thread_wait_func, chr)) {
2095 fprintf(stderr, "qemu_add_wait_object: failed\n");
2096 }
2097 }
2098
2099 dwMode |= ENABLE_LINE_INPUT;
2100
2101 if (is_console) {
2102 /* set the terminal in raw mode */
2103 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2104 dwMode |= ENABLE_PROCESSED_INPUT;
2105 }
2106
2107 SetConsoleMode(stdio->hStdIn, dwMode);
2108
2109 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2110 qemu_chr_fe_set_echo(chr, false);
2111
2112 return chr;
2113 }
2114 #endif /* !_WIN32 */
2115
2116
2117 /***********************************************************/
2118 /* UDP Net console */
2119
2120 typedef struct {
2121 int fd;
2122 GIOChannel *chan;
2123 guint tag;
2124 uint8_t buf[READ_BUF_LEN];
2125 int bufcnt;
2126 int bufptr;
2127 int max_size;
2128 } NetCharDriver;
2129
2130 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2131 {
2132 NetCharDriver *s = chr->opaque;
2133 gsize bytes_written;
2134 GIOStatus status;
2135
2136 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2137 if (status == G_IO_STATUS_EOF) {
2138 return 0;
2139 } else if (status != G_IO_STATUS_NORMAL) {
2140 return -1;
2141 }
2142
2143 return bytes_written;
2144 }
2145
2146 static int udp_chr_read_poll(void *opaque)
2147 {
2148 CharDriverState *chr = opaque;
2149 NetCharDriver *s = chr->opaque;
2150
2151 s->max_size = qemu_chr_be_can_write(chr);
2152
2153 /* If there were any stray characters in the queue process them
2154 * first
2155 */
2156 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2157 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2158 s->bufptr++;
2159 s->max_size = qemu_chr_be_can_write(chr);
2160 }
2161 return s->max_size;
2162 }
2163
2164 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2165 {
2166 CharDriverState *chr = opaque;
2167 NetCharDriver *s = chr->opaque;
2168 gsize bytes_read = 0;
2169 GIOStatus status;
2170
2171 if (s->max_size == 0) {
2172 return TRUE;
2173 }
2174 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2175 &bytes_read, NULL);
2176 s->bufcnt = bytes_read;
2177 s->bufptr = s->bufcnt;
2178 if (status != G_IO_STATUS_NORMAL) {
2179 if (s->tag) {
2180 io_remove_watch_poll(s->tag);
2181 s->tag = 0;
2182 }
2183 return FALSE;
2184 }
2185
2186 s->bufptr = 0;
2187 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2188 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2189 s->bufptr++;
2190 s->max_size = qemu_chr_be_can_write(chr);
2191 }
2192
2193 return TRUE;
2194 }
2195
2196 static void udp_chr_update_read_handler(CharDriverState *chr)
2197 {
2198 NetCharDriver *s = chr->opaque;
2199
2200 if (s->tag) {
2201 io_remove_watch_poll(s->tag);
2202 s->tag = 0;
2203 }
2204
2205 if (s->chan) {
2206 s->tag = io_add_watch_poll(s->chan, udp_chr_read_poll, udp_chr_read, chr);
2207 }
2208 }
2209
2210 static void udp_chr_close(CharDriverState *chr)
2211 {
2212 NetCharDriver *s = chr->opaque;
2213 if (s->tag) {
2214 io_remove_watch_poll(s->tag);
2215 s->tag = 0;
2216 }
2217 if (s->chan) {
2218 g_io_channel_unref(s->chan);
2219 closesocket(s->fd);
2220 }
2221 g_free(s);
2222 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2223 }
2224
2225 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2226 {
2227 CharDriverState *chr = NULL;
2228 NetCharDriver *s = NULL;
2229
2230 chr = g_malloc0(sizeof(CharDriverState));
2231 s = g_malloc0(sizeof(NetCharDriver));
2232
2233 s->fd = fd;
2234 s->chan = io_channel_from_socket(s->fd);
2235 s->bufcnt = 0;
2236 s->bufptr = 0;
2237 chr->opaque = s;
2238 chr->chr_write = udp_chr_write;
2239 chr->chr_update_read_handler = udp_chr_update_read_handler;
2240 chr->chr_close = udp_chr_close;
2241 /* be isn't opened until we get a connection */
2242 chr->explicit_be_open = true;
2243 return chr;
2244 }
2245
2246 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2247 {
2248 Error *local_err = NULL;
2249 int fd = -1;
2250
2251 fd = inet_dgram_opts(opts, &local_err);
2252 if (fd < 0) {
2253 qerror_report_err(local_err);
2254 error_free(local_err);
2255 return NULL;
2256 }
2257 return qemu_chr_open_udp_fd(fd);
2258 }
2259
2260 /***********************************************************/
2261 /* TCP Net console */
2262
2263 typedef struct {
2264
2265 GIOChannel *chan, *listen_chan;
2266 guint tag, listen_tag;
2267 int fd, listen_fd;
2268 int connected;
2269 int max_size;
2270 int do_telnetopt;
2271 int do_nodelay;
2272 int is_unix;
2273 int msgfd;
2274 } TCPCharDriver;
2275
2276 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2277
2278 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2279 {
2280 TCPCharDriver *s = chr->opaque;
2281 if (s->connected) {
2282 return io_channel_send(s->chan, buf, len);
2283 } else {
2284 /* XXX: indicate an error ? */
2285 return len;
2286 }
2287 }
2288
2289 static int tcp_chr_read_poll(void *opaque)
2290 {
2291 CharDriverState *chr = opaque;
2292 TCPCharDriver *s = chr->opaque;
2293 if (!s->connected)
2294 return 0;
2295 s->max_size = qemu_chr_be_can_write(chr);
2296 return s->max_size;
2297 }
2298
2299 #define IAC 255
2300 #define IAC_BREAK 243
2301 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2302 TCPCharDriver *s,
2303 uint8_t *buf, int *size)
2304 {
2305 /* Handle any telnet client's basic IAC options to satisfy char by
2306 * char mode with no echo. All IAC options will be removed from
2307 * the buf and the do_telnetopt variable will be used to track the
2308 * state of the width of the IAC information.
2309 *
2310 * IAC commands come in sets of 3 bytes with the exception of the
2311 * "IAC BREAK" command and the double IAC.
2312 */
2313
2314 int i;
2315 int j = 0;
2316
2317 for (i = 0; i < *size; i++) {
2318 if (s->do_telnetopt > 1) {
2319 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2320 /* Double IAC means send an IAC */
2321 if (j != i)
2322 buf[j] = buf[i];
2323 j++;
2324 s->do_telnetopt = 1;
2325 } else {
2326 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2327 /* Handle IAC break commands by sending a serial break */
2328 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2329 s->do_telnetopt++;
2330 }
2331 s->do_telnetopt++;
2332 }
2333 if (s->do_telnetopt >= 4) {
2334 s->do_telnetopt = 1;
2335 }
2336 } else {
2337 if ((unsigned char)buf[i] == IAC) {
2338 s->do_telnetopt = 2;
2339 } else {
2340 if (j != i)
2341 buf[j] = buf[i];
2342 j++;
2343 }
2344 }
2345 }
2346 *size = j;
2347 }
2348
2349 static int tcp_get_msgfd(CharDriverState *chr)
2350 {
2351 TCPCharDriver *s = chr->opaque;
2352 int fd = s->msgfd;
2353 s->msgfd = -1;
2354 return fd;
2355 }
2356
2357 #ifndef _WIN32
2358 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2359 {
2360 TCPCharDriver *s = chr->opaque;
2361 struct cmsghdr *cmsg;
2362
2363 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2364 int fd;
2365
2366 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2367 cmsg->cmsg_level != SOL_SOCKET ||
2368 cmsg->cmsg_type != SCM_RIGHTS)
2369 continue;
2370
2371 fd = *((int *)CMSG_DATA(cmsg));
2372 if (fd < 0)
2373 continue;
2374
2375 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2376 qemu_set_block(fd);
2377
2378 #ifndef MSG_CMSG_CLOEXEC
2379 qemu_set_cloexec(fd);
2380 #endif
2381 if (s->msgfd != -1)
2382 close(s->msgfd);
2383 s->msgfd = fd;
2384 }
2385 }
2386
2387 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2388 {
2389 TCPCharDriver *s = chr->opaque;
2390 struct msghdr msg = { NULL, };
2391 struct iovec iov[1];
2392 union {
2393 struct cmsghdr cmsg;
2394 char control[CMSG_SPACE(sizeof(int))];
2395 } msg_control;
2396 int flags = 0;
2397 ssize_t ret;
2398
2399 iov[0].iov_base = buf;
2400 iov[0].iov_len = len;
2401
2402 msg.msg_iov = iov;
2403 msg.msg_iovlen = 1;
2404 msg.msg_control = &msg_control;
2405 msg.msg_controllen = sizeof(msg_control);
2406
2407 #ifdef MSG_CMSG_CLOEXEC
2408 flags |= MSG_CMSG_CLOEXEC;
2409 #endif
2410 ret = recvmsg(s->fd, &msg, flags);
2411 if (ret > 0 && s->is_unix) {
2412 unix_process_msgfd(chr, &msg);
2413 }
2414
2415 return ret;
2416 }
2417 #else
2418 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2419 {
2420 TCPCharDriver *s = chr->opaque;
2421 return qemu_recv(s->fd, buf, len, 0);
2422 }
2423 #endif
2424
2425 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2426 {
2427 TCPCharDriver *s = chr->opaque;
2428 return g_io_create_watch(s->chan, cond);
2429 }
2430
2431 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2432 {
2433 CharDriverState *chr = opaque;
2434 TCPCharDriver *s = chr->opaque;
2435 uint8_t buf[READ_BUF_LEN];
2436 int len, size;
2437
2438 if (!s->connected || s->max_size <= 0) {
2439 return TRUE;
2440 }
2441 len = sizeof(buf);
2442 if (len > s->max_size)
2443 len = s->max_size;
2444 size = tcp_chr_recv(chr, (void *)buf, len);
2445 if (size == 0) {
2446 /* connection closed */
2447 s->connected = 0;
2448 if (s->listen_chan) {
2449 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2450 }
2451 if (s->tag) {
2452 io_remove_watch_poll(s->tag);
2453 s->tag = 0;
2454 }
2455 g_io_channel_unref(s->chan);
2456 s->chan = NULL;
2457 closesocket(s->fd);
2458 s->fd = -1;
2459 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2460 } else if (size > 0) {
2461 if (s->do_telnetopt)
2462 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2463 if (size > 0)
2464 qemu_chr_be_write(chr, buf, size);
2465 }
2466
2467 return TRUE;
2468 }
2469
2470 #ifndef _WIN32
2471 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2472 {
2473 return qemu_chr_open_fd(eventfd, eventfd);
2474 }
2475 #endif
2476
2477 static void tcp_chr_connect(void *opaque)
2478 {
2479 CharDriverState *chr = opaque;
2480 TCPCharDriver *s = chr->opaque;
2481
2482 s->connected = 1;
2483 if (s->chan) {
2484 s->tag = io_add_watch_poll(s->chan, tcp_chr_read_poll, tcp_chr_read, chr);
2485 }
2486 qemu_chr_be_generic_open(chr);
2487 }
2488
2489 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2490 static void tcp_chr_telnet_init(int fd)
2491 {
2492 char buf[3];
2493 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2494 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2495 send(fd, (char *)buf, 3, 0);
2496 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2497 send(fd, (char *)buf, 3, 0);
2498 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2499 send(fd, (char *)buf, 3, 0);
2500 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2501 send(fd, (char *)buf, 3, 0);
2502 }
2503
2504 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2505 {
2506 TCPCharDriver *s = chr->opaque;
2507 if (s->fd != -1)
2508 return -1;
2509
2510 qemu_set_nonblock(fd);
2511 if (s->do_nodelay)
2512 socket_set_nodelay(fd);
2513 s->fd = fd;
2514 s->chan = io_channel_from_socket(fd);
2515 if (s->listen_tag) {
2516 g_source_remove(s->listen_tag);
2517 s->listen_tag = 0;
2518 }
2519 tcp_chr_connect(chr);
2520
2521 return 0;
2522 }
2523
2524 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
2525 {
2526 CharDriverState *chr = opaque;
2527 TCPCharDriver *s = chr->opaque;
2528 struct sockaddr_in saddr;
2529 #ifndef _WIN32
2530 struct sockaddr_un uaddr;
2531 #endif
2532 struct sockaddr *addr;
2533 socklen_t len;
2534 int fd;
2535
2536 for(;;) {
2537 #ifndef _WIN32
2538 if (s->is_unix) {
2539 len = sizeof(uaddr);
2540 addr = (struct sockaddr *)&uaddr;
2541 } else
2542 #endif
2543 {
2544 len = sizeof(saddr);
2545 addr = (struct sockaddr *)&saddr;
2546 }
2547 fd = qemu_accept(s->listen_fd, addr, &len);
2548 if (fd < 0 && errno != EINTR) {
2549 s->listen_tag = 0;
2550 return FALSE;
2551 } else if (fd >= 0) {
2552 if (s->do_telnetopt)
2553 tcp_chr_telnet_init(fd);
2554 break;
2555 }
2556 }
2557 if (tcp_chr_add_client(chr, fd) < 0)
2558 close(fd);
2559
2560 return TRUE;
2561 }
2562
2563 static void tcp_chr_close(CharDriverState *chr)
2564 {
2565 TCPCharDriver *s = chr->opaque;
2566 if (s->fd >= 0) {
2567 if (s->tag) {
2568 io_remove_watch_poll(s->tag);
2569 s->tag = 0;
2570 }
2571 if (s->chan) {
2572 g_io_channel_unref(s->chan);
2573 }
2574 closesocket(s->fd);
2575 }
2576 if (s->listen_fd >= 0) {
2577 if (s->listen_tag) {
2578 g_source_remove(s->listen_tag);
2579 s->listen_tag = 0;
2580 }
2581 if (s->listen_chan) {
2582 g_io_channel_unref(s->listen_chan);
2583 }
2584 closesocket(s->listen_fd);
2585 }
2586 g_free(s);
2587 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2588 }
2589
2590 static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
2591 bool is_listen, bool is_telnet,
2592 bool is_waitconnect,
2593 Error **errp)
2594 {
2595 CharDriverState *chr = NULL;
2596 TCPCharDriver *s = NULL;
2597 char host[NI_MAXHOST], serv[NI_MAXSERV];
2598 const char *left = "", *right = "";
2599 struct sockaddr_storage ss;
2600 socklen_t ss_len = sizeof(ss);
2601
2602 memset(&ss, 0, ss_len);
2603 if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2604 error_setg_errno(errp, errno, "getsockname");
2605 return NULL;
2606 }
2607
2608 chr = g_malloc0(sizeof(CharDriverState));
2609 s = g_malloc0(sizeof(TCPCharDriver));
2610
2611 s->connected = 0;
2612 s->fd = -1;
2613 s->listen_fd = -1;
2614 s->msgfd = -1;
2615
2616 chr->filename = g_malloc(256);
2617 switch (ss.ss_family) {
2618 #ifndef _WIN32
2619 case AF_UNIX:
2620 s->is_unix = 1;
2621 snprintf(chr->filename, 256, "unix:%s%s",
2622 ((struct sockaddr_un *)(&ss))->sun_path,
2623 is_listen ? ",server" : "");
2624 break;
2625 #endif
2626 case AF_INET6:
2627 left = "[";
2628 right = "]";
2629 /* fall through */
2630 case AF_INET:
2631 s->do_nodelay = do_nodelay;
2632 getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
2633 serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
2634 snprintf(chr->filename, 256, "%s:%s%s%s:%s%s",
2635 is_telnet ? "telnet" : "tcp",
2636 left, host, right, serv,
2637 is_listen ? ",server" : "");
2638 break;
2639 }
2640
2641 chr->opaque = s;
2642 chr->chr_write = tcp_chr_write;
2643 chr->chr_close = tcp_chr_close;
2644 chr->get_msgfd = tcp_get_msgfd;
2645 chr->chr_add_client = tcp_chr_add_client;
2646 chr->chr_add_watch = tcp_chr_add_watch;
2647 /* be isn't opened until we get a connection */
2648 chr->explicit_be_open = true;
2649
2650 if (is_listen) {
2651 s->listen_fd = fd;
2652 s->listen_chan = io_channel_from_socket(s->listen_fd);
2653 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2654 if (is_telnet) {
2655 s->do_telnetopt = 1;
2656 }
2657 } else {
2658 s->connected = 1;
2659 s->fd = fd;
2660 socket_set_nodelay(fd);
2661 s->chan = io_channel_from_socket(s->fd);
2662 tcp_chr_connect(chr);
2663 }
2664
2665 if (is_listen && is_waitconnect) {
2666 fprintf(stderr, "QEMU waiting for connection on: %s\n",
2667 chr->filename);
2668 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
2669 qemu_set_nonblock(s->listen_fd);
2670 }
2671 return chr;
2672 }
2673
2674 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2675 {
2676 CharDriverState *chr = NULL;
2677 Error *local_err = NULL;
2678 int fd = -1;
2679
2680 bool is_listen = qemu_opt_get_bool(opts, "server", false);
2681 bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true);
2682 bool is_telnet = qemu_opt_get_bool(opts, "telnet", false);
2683 bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true);
2684 bool is_unix = qemu_opt_get(opts, "path") != NULL;
2685
2686 if (is_unix) {
2687 if (is_listen) {
2688 fd = unix_listen_opts(opts, &local_err);
2689 } else {
2690 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
2691 }
2692 } else {
2693 if (is_listen) {
2694 fd = inet_listen_opts(opts, 0, &local_err);
2695 } else {
2696 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
2697 }
2698 }
2699 if (fd < 0) {
2700 goto fail;
2701 }
2702
2703 if (!is_waitconnect)
2704 qemu_set_nonblock(fd);
2705
2706 chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet,
2707 is_waitconnect, &local_err);
2708 if (error_is_set(&local_err)) {
2709 goto fail;
2710 }
2711 return chr;
2712
2713
2714 fail:
2715 if (local_err) {
2716 qerror_report_err(local_err);
2717 error_free(local_err);
2718 }
2719 if (fd >= 0) {
2720 closesocket(fd);
2721 }
2722 if (chr) {
2723 g_free(chr->opaque);
2724 g_free(chr);
2725 }
2726 return NULL;
2727 }
2728
2729 /*********************************************************/
2730 /* Ring buffer chardev */
2731
2732 typedef struct {
2733 size_t size;
2734 size_t prod;
2735 size_t cons;
2736 uint8_t *cbuf;
2737 } RingBufCharDriver;
2738
2739 static size_t ringbuf_count(const CharDriverState *chr)
2740 {
2741 const RingBufCharDriver *d = chr->opaque;
2742
2743 return d->prod - d->cons;
2744 }
2745
2746 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2747 {
2748 RingBufCharDriver *d = chr->opaque;
2749 int i;
2750
2751 if (!buf || (len < 0)) {
2752 return -1;
2753 }
2754
2755 for (i = 0; i < len; i++ ) {
2756 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
2757 if (d->prod - d->cons > d->size) {
2758 d->cons = d->prod - d->size;
2759 }
2760 }
2761
2762 return 0;
2763 }
2764
2765 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
2766 {
2767 RingBufCharDriver *d = chr->opaque;
2768 int i;
2769
2770 for (i = 0; i < len && d->cons != d->prod; i++) {
2771 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
2772 }
2773
2774 return i;
2775 }
2776
2777 static void ringbuf_chr_close(struct CharDriverState *chr)
2778 {
2779 RingBufCharDriver *d = chr->opaque;
2780
2781 g_free(d->cbuf);
2782 g_free(d);
2783 chr->opaque = NULL;
2784 }
2785
2786 static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts,
2787 Error **errp)
2788 {
2789 CharDriverState *chr;
2790 RingBufCharDriver *d;
2791
2792 chr = g_malloc0(sizeof(CharDriverState));
2793 d = g_malloc(sizeof(*d));
2794
2795 d->size = opts->has_size ? opts->size : 65536;
2796
2797 /* The size must be power of 2 */
2798 if (d->size & (d->size - 1)) {
2799 error_setg(errp, "size of ringbuf chardev must be power of two");
2800 goto fail;
2801 }
2802
2803 d->prod = 0;
2804 d->cons = 0;
2805 d->cbuf = g_malloc0(d->size);
2806
2807 chr->opaque = d;
2808 chr->chr_write = ringbuf_chr_write;
2809 chr->chr_close = ringbuf_chr_close;
2810
2811 return chr;
2812
2813 fail:
2814 g_free(d);
2815 g_free(chr);
2816 return NULL;
2817 }
2818
2819 static bool chr_is_ringbuf(const CharDriverState *chr)
2820 {
2821 return chr->chr_write == ringbuf_chr_write;
2822 }
2823
2824 void qmp_ringbuf_write(const char *device, const char *data,
2825 bool has_format, enum DataFormat format,
2826 Error **errp)
2827 {
2828 CharDriverState *chr;
2829 const uint8_t *write_data;
2830 int ret;
2831 gsize write_count;
2832
2833 chr = qemu_chr_find(device);
2834 if (!chr) {
2835 error_setg(errp, "Device '%s' not found", device);
2836 return;
2837 }
2838
2839 if (!chr_is_ringbuf(chr)) {
2840 error_setg(errp,"%s is not a ringbuf device", device);
2841 return;
2842 }
2843
2844 if (has_format && (format == DATA_FORMAT_BASE64)) {
2845 write_data = g_base64_decode(data, &write_count);
2846 } else {
2847 write_data = (uint8_t *)data;
2848 write_count = strlen(data);
2849 }
2850
2851 ret = ringbuf_chr_write(chr, write_data, write_count);
2852
2853 if (write_data != (uint8_t *)data) {
2854 g_free((void *)write_data);
2855 }
2856
2857 if (ret < 0) {
2858 error_setg(errp, "Failed to write to device %s", device);
2859 return;
2860 }
2861 }
2862
2863 char *qmp_ringbuf_read(const char *device, int64_t size,
2864 bool has_format, enum DataFormat format,
2865 Error **errp)
2866 {
2867 CharDriverState *chr;
2868 uint8_t *read_data;
2869 size_t count;
2870 char *data;
2871
2872 chr = qemu_chr_find(device);
2873 if (!chr) {
2874 error_setg(errp, "Device '%s' not found", device);
2875 return NULL;
2876 }
2877
2878 if (!chr_is_ringbuf(chr)) {
2879 error_setg(errp,"%s is not a ringbuf device", device);
2880 return NULL;
2881 }
2882
2883 if (size <= 0) {
2884 error_setg(errp, "size must be greater than zero");
2885 return NULL;
2886 }
2887
2888 count = ringbuf_count(chr);
2889 size = size > count ? count : size;
2890 read_data = g_malloc(size + 1);
2891
2892 ringbuf_chr_read(chr, read_data, size);
2893
2894 if (has_format && (format == DATA_FORMAT_BASE64)) {
2895 data = g_base64_encode(read_data, size);
2896 g_free(read_data);
2897 } else {
2898 /*
2899 * FIXME should read only complete, valid UTF-8 characters up
2900 * to @size bytes. Invalid sequences should be replaced by a
2901 * suitable replacement character. Except when (and only
2902 * when) ring buffer lost characters since last read, initial
2903 * continuation characters should be dropped.
2904 */
2905 read_data[size] = 0;
2906 data = (char *)read_data;
2907 }
2908
2909 return data;
2910 }
2911
2912 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2913 {
2914 char host[65], port[33], width[8], height[8];
2915 int pos;
2916 const char *p;
2917 QemuOpts *opts;
2918 Error *local_err = NULL;
2919
2920 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
2921 if (error_is_set(&local_err)) {
2922 qerror_report_err(local_err);
2923 error_free(local_err);
2924 return NULL;
2925 }
2926
2927 if (strstart(filename, "mon:", &p)) {
2928 filename = p;
2929 qemu_opt_set(opts, "mux", "on");
2930 if (strcmp(filename, "stdio") == 0) {
2931 /* Monitor is muxed to stdio: do not exit on Ctrl+C by default
2932 * but pass it to the guest. Handle this only for compat syntax,
2933 * for -chardev syntax we have special option for this.
2934 * This is what -nographic did, redirecting+muxing serial+monitor
2935 * to stdio causing Ctrl+C to be passed to guest. */
2936 qemu_opt_set(opts, "signal", "off");
2937 }
2938 }
2939
2940 if (strcmp(filename, "null") == 0 ||
2941 strcmp(filename, "pty") == 0 ||
2942 strcmp(filename, "msmouse") == 0 ||
2943 strcmp(filename, "braille") == 0 ||
2944 strcmp(filename, "stdio") == 0) {
2945 qemu_opt_set(opts, "backend", filename);
2946 return opts;
2947 }
2948 if (strstart(filename, "vc", &p)) {
2949 qemu_opt_set(opts, "backend", "vc");
2950 if (*p == ':') {
2951 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2952 /* pixels */
2953 qemu_opt_set(opts, "width", width);
2954 qemu_opt_set(opts, "height", height);
2955 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2956 /* chars */
2957 qemu_opt_set(opts, "cols", width);
2958 qemu_opt_set(opts, "rows", height);
2959 } else {
2960 goto fail;
2961 }
2962 }
2963 return opts;
2964 }
2965 if (strcmp(filename, "con:") == 0) {
2966 qemu_opt_set(opts, "backend", "console");
2967 return opts;
2968 }
2969 if (strstart(filename, "COM", NULL)) {
2970 qemu_opt_set(opts, "backend", "serial");
2971 qemu_opt_set(opts, "path", filename);
2972 return opts;
2973 }
2974 if (strstart(filename, "file:", &p)) {
2975 qemu_opt_set(opts, "backend", "file");
2976 qemu_opt_set(opts, "path", p);
2977 return opts;
2978 }
2979 if (strstart(filename, "pipe:", &p)) {
2980 qemu_opt_set(opts, "backend", "pipe");
2981 qemu_opt_set(opts, "path", p);
2982 return opts;
2983 }
2984 if (strstart(filename, "tcp:", &p) ||
2985 strstart(filename, "telnet:", &p)) {
2986 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2987 host[0] = 0;
2988 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2989 goto fail;
2990 }
2991 qemu_opt_set(opts, "backend", "socket");
2992 qemu_opt_set(opts, "host", host);
2993 qemu_opt_set(opts, "port", port);
2994 if (p[pos] == ',') {
2995 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2996 goto fail;
2997 }
2998 if (strstart(filename, "telnet:", &p))
2999 qemu_opt_set(opts, "telnet", "on");
3000 return opts;
3001 }
3002 if (strstart(filename, "udp:", &p)) {
3003 qemu_opt_set(opts, "backend", "udp");
3004 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3005 host[0] = 0;
3006 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3007 goto fail;
3008 }
3009 }
3010 qemu_opt_set(opts, "host", host);
3011 qemu_opt_set(opts, "port", port);
3012 if (p[pos] == '@') {
3013 p += pos + 1;
3014 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3015 host[0] = 0;
3016 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3017 goto fail;
3018 }
3019 }
3020 qemu_opt_set(opts, "localaddr", host);
3021 qemu_opt_set(opts, "localport", port);
3022 }
3023 return opts;
3024 }
3025 if (strstart(filename, "unix:", &p)) {
3026 qemu_opt_set(opts, "backend", "socket");
3027 if (qemu_opts_do_parse(opts, p, "path") != 0)
3028 goto fail;
3029 return opts;
3030 }
3031 if (strstart(filename, "/dev/parport", NULL) ||
3032 strstart(filename, "/dev/ppi", NULL)) {
3033 qemu_opt_set(opts, "backend", "parport");
3034 qemu_opt_set(opts, "path", filename);
3035 return opts;
3036 }
3037 if (strstart(filename, "/dev/", NULL)) {
3038 qemu_opt_set(opts, "backend", "tty");
3039 qemu_opt_set(opts, "path", filename);
3040 return opts;
3041 }
3042
3043 fail:
3044 qemu_opts_del(opts);
3045 return NULL;
3046 }
3047
3048 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3049 Error **errp)
3050 {
3051 const char *path = qemu_opt_get(opts, "path");
3052
3053 if (path == NULL) {
3054 error_setg(errp, "chardev: file: no filename given");
3055 return;
3056 }
3057 backend->file = g_new0(ChardevFile, 1);
3058 backend->file->out = g_strdup(path);
3059 }
3060
3061 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3062 Error **errp)
3063 {
3064 backend->stdio = g_new0(ChardevStdio, 1);
3065 backend->stdio->has_signal = true;
3066 backend->stdio->signal = qemu_opt_get_bool(opts, "signal", true);
3067 }
3068
3069 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3070 Error **errp)
3071 {
3072 const char *device = qemu_opt_get(opts, "path");
3073
3074 if (device == NULL) {
3075 error_setg(errp, "chardev: serial/tty: no device path given");
3076 return;
3077 }
3078 backend->serial = g_new0(ChardevHostdev, 1);
3079 backend->serial->device = g_strdup(device);
3080 }
3081
3082 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3083 Error **errp)
3084 {
3085 const char *device = qemu_opt_get(opts, "path");
3086
3087 if (device == NULL) {
3088 error_setg(errp, "chardev: parallel: no device path given");
3089 return;
3090 }
3091 backend->parallel = g_new0(ChardevHostdev, 1);
3092 backend->parallel->device = g_strdup(device);
3093 }
3094
3095 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3096 Error **errp)
3097 {
3098 const char *device = qemu_opt_get(opts, "path");
3099
3100 if (device == NULL) {
3101 error_setg(errp, "chardev: pipe: no device path given");
3102 return;
3103 }
3104 backend->pipe = g_new0(ChardevHostdev, 1);
3105 backend->pipe->device = g_strdup(device);
3106 }
3107
3108 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3109 Error **errp)
3110 {
3111 int val;
3112
3113 backend->memory = g_new0(ChardevRingbuf, 1);
3114
3115 val = qemu_opt_get_size(opts, "size", 0);
3116 if (val != 0) {
3117 backend->memory->has_size = true;
3118 backend->memory->size = val;
3119 }
3120 }
3121
3122 static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
3123 Error **errp)
3124 {
3125 const char *chardev = qemu_opt_get(opts, "chardev");
3126
3127 if (chardev == NULL) {
3128 error_setg(errp, "chardev: mux: no chardev given");
3129 return;
3130 }
3131 backend->mux = g_new0(ChardevMux, 1);
3132 backend->mux->chardev = g_strdup(chardev);
3133 }
3134
3135 typedef struct CharDriver {
3136 const char *name;
3137 /* old, pre qapi */
3138 CharDriverState *(*open)(QemuOpts *opts);
3139 /* new, qapi-based */
3140 ChardevBackendKind kind;
3141 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3142 } CharDriver;
3143
3144 static GSList *backends;
3145
3146 void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *))
3147 {
3148 CharDriver *s;
3149
3150 s = g_malloc0(sizeof(*s));
3151 s->name = g_strdup(name);
3152 s->open = open;
3153
3154 backends = g_slist_append(backends, s);
3155 }
3156
3157 void register_char_driver_qapi(const char *name, ChardevBackendKind kind,
3158 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp))
3159 {
3160 CharDriver *s;
3161
3162 s = g_malloc0(sizeof(*s));
3163 s->name = g_strdup(name);
3164 s->kind = kind;
3165 s->parse = parse;
3166
3167 backends = g_slist_append(backends, s);
3168 }
3169
3170 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3171 void (*init)(struct CharDriverState *s),
3172 Error **errp)
3173 {
3174 CharDriver *cd;
3175 CharDriverState *chr;
3176 GSList *i;
3177
3178 if (qemu_opts_id(opts) == NULL) {
3179 error_setg(errp, "chardev: no id specified");
3180 goto err;
3181 }
3182
3183 if (qemu_opt_get(opts, "backend") == NULL) {
3184 error_setg(errp, "chardev: \"%s\" missing backend",
3185 qemu_opts_id(opts));
3186 goto err;
3187 }
3188 for (i = backends; i; i = i->next) {
3189 cd = i->data;
3190
3191 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3192 break;
3193 }
3194 }
3195 if (i == NULL) {
3196 error_setg(errp, "chardev: backend \"%s\" not found",
3197 qemu_opt_get(opts, "backend"));
3198 goto err;
3199 }
3200
3201 if (!cd->open) {
3202 /* using new, qapi init */
3203 ChardevBackend *backend = g_new0(ChardevBackend, 1);
3204 ChardevReturn *ret = NULL;
3205 const char *id = qemu_opts_id(opts);
3206 char *bid = NULL;
3207
3208 if (qemu_opt_get_bool(opts, "mux", 0)) {
3209 bid = g_strdup_printf("%s-base", id);
3210 }
3211
3212 chr = NULL;
3213 backend->kind = cd->kind;
3214 if (cd->parse) {
3215 cd->parse(opts, backend, errp);
3216 if (error_is_set(errp)) {
3217 goto qapi_out;
3218 }
3219 }
3220 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3221 if (error_is_set(errp)) {
3222 goto qapi_out;
3223 }
3224
3225 if (bid) {
3226 qapi_free_ChardevBackend(backend);
3227 qapi_free_ChardevReturn(ret);
3228 backend = g_new0(ChardevBackend, 1);
3229 backend->mux = g_new0(ChardevMux, 1);
3230 backend->kind = CHARDEV_BACKEND_KIND_MUX;
3231 backend->mux->chardev = g_strdup(bid);
3232 ret = qmp_chardev_add(id, backend, errp);
3233 assert(!error_is_set(errp));
3234 }
3235
3236 chr = qemu_chr_find(id);
3237 chr->opts = opts;
3238
3239 qapi_out:
3240 qapi_free_ChardevBackend(backend);
3241 qapi_free_ChardevReturn(ret);
3242 g_free(bid);
3243 return chr;
3244 }
3245
3246 chr = cd->open(opts);
3247 if (!chr) {
3248 error_setg(errp, "chardev: opening backend \"%s\" failed",
3249 qemu_opt_get(opts, "backend"));
3250 goto err;
3251 }
3252
3253 if (!chr->filename)
3254 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
3255 chr->init = init;
3256 /* if we didn't create the chardev via qmp_chardev_add, we
3257 * need to send the OPENED event here
3258 */
3259 if (!chr->explicit_be_open) {
3260 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
3261 }
3262 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3263
3264 if (qemu_opt_get_bool(opts, "mux", 0)) {
3265 CharDriverState *base = chr;
3266 int len = strlen(qemu_opts_id(opts)) + 6;
3267 base->label = g_malloc(len);
3268 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
3269 chr = qemu_chr_open_mux(base);
3270 chr->filename = base->filename;
3271 chr->avail_connections = MAX_MUX;
3272 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3273 } else {
3274 chr->avail_connections = 1;
3275 }
3276 chr->label = g_strdup(qemu_opts_id(opts));
3277 chr->opts = opts;
3278 return chr;
3279
3280 err:
3281 qemu_opts_del(opts);
3282 return NULL;
3283 }
3284
3285 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3286 {
3287 const char *p;
3288 CharDriverState *chr;
3289 QemuOpts *opts;
3290 Error *err = NULL;
3291
3292 if (strstart(filename, "chardev:", &p)) {
3293 return qemu_chr_find(p);
3294 }
3295
3296 opts = qemu_chr_parse_compat(label, filename);
3297 if (!opts)
3298 return NULL;
3299
3300 chr = qemu_chr_new_from_opts(opts, init, &err);
3301 if (error_is_set(&err)) {
3302 fprintf(stderr, "%s\n", error_get_pretty(err));
3303 error_free(err);
3304 }
3305 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3306 qemu_chr_fe_claim_no_fail(chr);
3307 monitor_init(chr, MONITOR_USE_READLINE);
3308 }
3309 return chr;
3310 }
3311
3312 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3313 {
3314 if (chr->chr_set_echo) {
3315 chr->chr_set_echo(chr, echo);
3316 }
3317 }
3318
3319 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
3320 {
3321 if (chr->fe_open == fe_open) {
3322 return;
3323 }
3324 chr->fe_open = fe_open;
3325 if (chr->chr_set_fe_open) {
3326 chr->chr_set_fe_open(chr, fe_open);
3327 }
3328 }
3329
3330 int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3331 GIOFunc func, void *user_data)
3332 {
3333 GSource *src;
3334 guint tag;
3335
3336 if (s->chr_add_watch == NULL) {
3337 return -ENOSYS;
3338 }
3339
3340 src = s->chr_add_watch(s, cond);
3341 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3342 tag = g_source_attach(src, NULL);
3343 g_source_unref(src);
3344
3345 return tag;
3346 }
3347
3348 int qemu_chr_fe_claim(CharDriverState *s)
3349 {
3350 if (s->avail_connections < 1) {
3351 return -1;
3352 }
3353 s->avail_connections--;
3354 return 0;
3355 }
3356
3357 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
3358 {
3359 if (qemu_chr_fe_claim(s) != 0) {
3360 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
3361 __func__, s->label);
3362 exit(1);
3363 }
3364 }
3365
3366 void qemu_chr_fe_release(CharDriverState *s)
3367 {
3368 s->avail_connections++;
3369 }
3370
3371 void qemu_chr_delete(CharDriverState *chr)
3372 {
3373 QTAILQ_REMOVE(&chardevs, chr, next);
3374 if (chr->chr_close) {
3375 chr->chr_close(chr);
3376 }
3377 g_free(chr->filename);
3378 g_free(chr->label);
3379 if (chr->opts) {
3380 qemu_opts_del(chr->opts);
3381 }
3382 g_free(chr);
3383 }
3384
3385 ChardevInfoList *qmp_query_chardev(Error **errp)
3386 {
3387 ChardevInfoList *chr_list = NULL;
3388 CharDriverState *chr;
3389
3390 QTAILQ_FOREACH(chr, &chardevs, next) {
3391 ChardevInfoList *info = g_malloc0(sizeof(*info));
3392 info->value = g_malloc0(sizeof(*info->value));
3393 info->value->label = g_strdup(chr->label);
3394 info->value->filename = g_strdup(chr->filename);
3395
3396 info->next = chr_list;
3397 chr_list = info;
3398 }
3399
3400 return chr_list;
3401 }
3402
3403 CharDriverState *qemu_chr_find(const char *name)
3404 {
3405 CharDriverState *chr;
3406
3407 QTAILQ_FOREACH(chr, &chardevs, next) {
3408 if (strcmp(chr->label, name) != 0)
3409 continue;
3410 return chr;
3411 }
3412 return NULL;
3413 }
3414
3415 /* Get a character (serial) device interface. */
3416 CharDriverState *qemu_char_get_next_serial(void)
3417 {
3418 static int next_serial;
3419 CharDriverState *chr;
3420
3421 /* FIXME: This function needs to go away: use chardev properties! */
3422
3423 while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
3424 chr = serial_hds[next_serial++];
3425 qemu_chr_fe_claim_no_fail(chr);
3426 return chr;
3427 }
3428 return NULL;
3429 }
3430
3431 QemuOptsList qemu_chardev_opts = {
3432 .name = "chardev",
3433 .implied_opt_name = "backend",
3434 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3435 .desc = {
3436 {
3437 .name = "backend",
3438 .type = QEMU_OPT_STRING,
3439 },{
3440 .name = "path",
3441 .type = QEMU_OPT_STRING,
3442 },{
3443 .name = "host",
3444 .type = QEMU_OPT_STRING,
3445 },{
3446 .name = "port",
3447 .type = QEMU_OPT_STRING,
3448 },{
3449 .name = "localaddr",
3450 .type = QEMU_OPT_STRING,
3451 },{
3452 .name = "localport",
3453 .type = QEMU_OPT_STRING,
3454 },{
3455 .name = "to",
3456 .type = QEMU_OPT_NUMBER,
3457 },{
3458 .name = "ipv4",
3459 .type = QEMU_OPT_BOOL,
3460 },{
3461 .name = "ipv6",
3462 .type = QEMU_OPT_BOOL,
3463 },{
3464 .name = "wait",
3465 .type = QEMU_OPT_BOOL,
3466 },{
3467 .name = "server",
3468 .type = QEMU_OPT_BOOL,
3469 },{
3470 .name = "delay",
3471 .type = QEMU_OPT_BOOL,
3472 },{
3473 .name = "telnet",
3474 .type = QEMU_OPT_BOOL,
3475 },{
3476 .name = "width",
3477 .type = QEMU_OPT_NUMBER,
3478 },{
3479 .name = "height",
3480 .type = QEMU_OPT_NUMBER,
3481 },{
3482 .name = "cols",
3483 .type = QEMU_OPT_NUMBER,
3484 },{
3485 .name = "rows",
3486 .type = QEMU_OPT_NUMBER,
3487 },{
3488 .name = "mux",
3489 .type = QEMU_OPT_BOOL,
3490 },{
3491 .name = "signal",
3492 .type = QEMU_OPT_BOOL,
3493 },{
3494 .name = "name",
3495 .type = QEMU_OPT_STRING,
3496 },{
3497 .name = "debug",
3498 .type = QEMU_OPT_NUMBER,
3499 },{
3500 .name = "size",
3501 .type = QEMU_OPT_SIZE,
3502 },{
3503 .name = "chardev",
3504 .type = QEMU_OPT_STRING,
3505 },
3506 { /* end of list */ }
3507 },
3508 };
3509
3510 #ifdef _WIN32
3511
3512 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3513 {
3514 HANDLE out;
3515
3516 if (file->has_in) {
3517 error_setg(errp, "input file not supported");
3518 return NULL;
3519 }
3520
3521 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
3522 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
3523 if (out == INVALID_HANDLE_VALUE) {
3524 error_setg(errp, "open %s failed", file->out);
3525 return NULL;
3526 }
3527 return qemu_chr_open_win_file(out);
3528 }
3529
3530 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3531 Error **errp)
3532 {
3533 return qemu_chr_open_win_path(serial->device);
3534 }
3535
3536 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3537 Error **errp)
3538 {
3539 error_setg(errp, "character device backend type 'parallel' not supported");
3540 return NULL;
3541 }
3542
3543 #else /* WIN32 */
3544
3545 static int qmp_chardev_open_file_source(char *src, int flags,
3546 Error **errp)
3547 {
3548 int fd = -1;
3549
3550 TFR(fd = qemu_open(src, flags, 0666));
3551 if (fd == -1) {
3552 error_setg_file_open(errp, errno, src);
3553 }
3554 return fd;
3555 }
3556
3557 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3558 {
3559 int flags, in = -1, out = -1;
3560
3561 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
3562 out = qmp_chardev_open_file_source(file->out, flags, errp);
3563 if (error_is_set(errp)) {
3564 return NULL;
3565 }
3566
3567 if (file->has_in) {
3568 flags = O_RDONLY;
3569 in = qmp_chardev_open_file_source(file->in, flags, errp);
3570 if (error_is_set(errp)) {
3571 qemu_close(out);
3572 return NULL;
3573 }
3574 }
3575
3576 return qemu_chr_open_fd(in, out);
3577 }
3578
3579 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3580 Error **errp)
3581 {
3582 #ifdef HAVE_CHARDEV_TTY
3583 int fd;
3584
3585 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
3586 if (error_is_set(errp)) {
3587 return NULL;
3588 }
3589 qemu_set_nonblock(fd);
3590 return qemu_chr_open_tty_fd(fd);
3591 #else
3592 error_setg(errp, "character device backend type 'serial' not supported");
3593 return NULL;
3594 #endif
3595 }
3596
3597 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3598 Error **errp)
3599 {
3600 #ifdef HAVE_CHARDEV_PARPORT
3601 int fd;
3602
3603 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
3604 if (error_is_set(errp)) {
3605 return NULL;
3606 }
3607 return qemu_chr_open_pp_fd(fd);
3608 #else
3609 error_setg(errp, "character device backend type 'parallel' not supported");
3610 return NULL;
3611 #endif
3612 }
3613
3614 #endif /* WIN32 */
3615
3616 static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
3617 Error **errp)
3618 {
3619 SocketAddress *addr = sock->addr;
3620 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
3621 bool is_listen = sock->has_server ? sock->server : true;
3622 bool is_telnet = sock->has_telnet ? sock->telnet : false;
3623 bool is_waitconnect = sock->has_wait ? sock->wait : false;
3624 int fd;
3625
3626 if (is_listen) {
3627 fd = socket_listen(addr, errp);
3628 } else {
3629 fd = socket_connect(addr, errp, NULL, NULL);
3630 }
3631 if (error_is_set(errp)) {
3632 return NULL;
3633 }
3634 return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
3635 is_telnet, is_waitconnect, errp);
3636 }
3637
3638 static CharDriverState *qmp_chardev_open_udp(ChardevUdp *udp,
3639 Error **errp)
3640 {
3641 int fd;
3642
3643 fd = socket_dgram(udp->remote, udp->local, errp);
3644 if (error_is_set(errp)) {
3645 return NULL;
3646 }
3647 return qemu_chr_open_udp_fd(fd);
3648 }
3649
3650 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
3651 Error **errp)
3652 {
3653 ChardevReturn *ret = g_new0(ChardevReturn, 1);
3654 CharDriverState *base, *chr = NULL;
3655
3656 chr = qemu_chr_find(id);
3657 if (chr) {
3658 error_setg(errp, "Chardev '%s' already exists", id);
3659 g_free(ret);
3660 return NULL;
3661 }
3662
3663 switch (backend->kind) {
3664 case CHARDEV_BACKEND_KIND_FILE:
3665 chr = qmp_chardev_open_file(backend->file, errp);
3666 break;
3667 case CHARDEV_BACKEND_KIND_SERIAL:
3668 chr = qmp_chardev_open_serial(backend->serial, errp);
3669 break;
3670 case CHARDEV_BACKEND_KIND_PARALLEL:
3671 chr = qmp_chardev_open_parallel(backend->parallel, errp);
3672 break;
3673 case CHARDEV_BACKEND_KIND_PIPE:
3674 chr = qemu_chr_open_pipe(backend->pipe);
3675 break;
3676 case CHARDEV_BACKEND_KIND_SOCKET:
3677 chr = qmp_chardev_open_socket(backend->socket, errp);
3678 break;
3679 case CHARDEV_BACKEND_KIND_UDP:
3680 chr = qmp_chardev_open_udp(backend->udp, errp);
3681 break;
3682 #ifdef HAVE_CHARDEV_TTY
3683 case CHARDEV_BACKEND_KIND_PTY:
3684 chr = qemu_chr_open_pty(id, ret);
3685 break;
3686 #endif
3687 case CHARDEV_BACKEND_KIND_NULL:
3688 chr = qemu_chr_open_null();
3689 break;
3690 case CHARDEV_BACKEND_KIND_MUX:
3691 base = qemu_chr_find(backend->mux->chardev);
3692 if (base == NULL) {
3693 error_setg(errp, "mux: base chardev %s not found",
3694 backend->mux->chardev);
3695 break;
3696 }
3697 chr = qemu_chr_open_mux(base);
3698 break;
3699 case CHARDEV_BACKEND_KIND_MSMOUSE:
3700 chr = qemu_chr_open_msmouse();
3701 break;
3702 #ifdef CONFIG_BRLAPI
3703 case CHARDEV_BACKEND_KIND_BRAILLE:
3704 chr = chr_baum_init();
3705 break;
3706 #endif
3707 case CHARDEV_BACKEND_KIND_STDIO:
3708 chr = qemu_chr_open_stdio(backend->stdio);
3709 break;
3710 #ifdef _WIN32
3711 case CHARDEV_BACKEND_KIND_CONSOLE:
3712 chr = qemu_chr_open_win_con();
3713 break;
3714 #endif
3715 #ifdef CONFIG_SPICE
3716 case CHARDEV_BACKEND_KIND_SPICEVMC:
3717 chr = qemu_chr_open_spice_vmc(backend->spicevmc->type);
3718 break;
3719 case CHARDEV_BACKEND_KIND_SPICEPORT:
3720 chr = qemu_chr_open_spice_port(backend->spiceport->fqdn);
3721 break;
3722 #endif
3723 case CHARDEV_BACKEND_KIND_VC:
3724 chr = vc_init(backend->vc);
3725 break;
3726 case CHARDEV_BACKEND_KIND_MEMORY:
3727 chr = qemu_chr_open_ringbuf(backend->memory, errp);
3728 break;
3729 default:
3730 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
3731 break;
3732 }
3733
3734 if (chr == NULL && !error_is_set(errp)) {
3735 error_setg(errp, "Failed to create chardev");
3736 }
3737 if (chr) {
3738 chr->label = g_strdup(id);
3739 chr->avail_connections =
3740 (backend->kind == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
3741 if (!chr->filename) {
3742 chr->filename = g_strdup(ChardevBackendKind_lookup[backend->kind]);
3743 }
3744 if (!chr->explicit_be_open) {
3745 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
3746 }
3747 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3748 return ret;
3749 } else {
3750 g_free(ret);
3751 return NULL;
3752 }
3753 }
3754
3755 void qmp_chardev_remove(const char *id, Error **errp)
3756 {
3757 CharDriverState *chr;
3758
3759 chr = qemu_chr_find(id);
3760 if (NULL == chr) {
3761 error_setg(errp, "Chardev '%s' not found", id);
3762 return;
3763 }
3764 if (chr->chr_can_read || chr->chr_read ||
3765 chr->chr_event || chr->handler_opaque) {
3766 error_setg(errp, "Chardev '%s' is busy", id);
3767 return;
3768 }
3769 qemu_chr_delete(chr);
3770 }
3771
3772 static void register_types(void)
3773 {
3774 register_char_driver_qapi("null", CHARDEV_BACKEND_KIND_NULL, NULL);
3775 register_char_driver("socket", qemu_chr_open_socket);
3776 register_char_driver("udp", qemu_chr_open_udp);
3777 register_char_driver_qapi("ringbuf", CHARDEV_BACKEND_KIND_MEMORY,
3778 qemu_chr_parse_ringbuf);
3779 register_char_driver_qapi("file", CHARDEV_BACKEND_KIND_FILE,
3780 qemu_chr_parse_file_out);
3781 register_char_driver_qapi("stdio", CHARDEV_BACKEND_KIND_STDIO,
3782 qemu_chr_parse_stdio);
3783 register_char_driver_qapi("serial", CHARDEV_BACKEND_KIND_SERIAL,
3784 qemu_chr_parse_serial);
3785 register_char_driver_qapi("tty", CHARDEV_BACKEND_KIND_SERIAL,
3786 qemu_chr_parse_serial);
3787 register_char_driver_qapi("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
3788 qemu_chr_parse_parallel);
3789 register_char_driver_qapi("parport", CHARDEV_BACKEND_KIND_PARALLEL,
3790 qemu_chr_parse_parallel);
3791 register_char_driver_qapi("pty", CHARDEV_BACKEND_KIND_PTY, NULL);
3792 register_char_driver_qapi("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL);
3793 register_char_driver_qapi("pipe", CHARDEV_BACKEND_KIND_PIPE,
3794 qemu_chr_parse_pipe);
3795 register_char_driver_qapi("mux", CHARDEV_BACKEND_KIND_MUX,
3796 qemu_chr_parse_mux);
3797 /* Bug-compatibility: */
3798 register_char_driver_qapi("memory", CHARDEV_BACKEND_KIND_MEMORY,
3799 qemu_chr_parse_ringbuf);
3800 }
3801
3802 type_init(register_types);
AR7 emulation for QEMU