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qemu-char: really fix behavior on can_read = 0
[qemu/ar7.git] / qemu-char.c
blobeae17fc61cc6c8080c810a0f8e4ffc2e2dd7b436
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 "char/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(__GLIBC__)
57 #include <pty.h>
58 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
59 #include <libutil.h>
60 #else
61 #include <util.h>
62 #endif
63 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
64 #include <dev/ppbus/ppi.h>
65 #include <dev/ppbus/ppbconf.h>
66 #elif defined(__DragonFly__)
67 #include <dev/misc/ppi/ppi.h>
68 #include <bus/ppbus/ppbconf.h>
69 #endif
70 #else
71 #ifdef __linux__
72 #include <pty.h>
73
74 #include <linux/ppdev.h>
75 #include <linux/parport.h>
76 #endif
77 #ifdef __sun__
78 #include <sys/stat.h>
79 #include <sys/ethernet.h>
80 #include <sys/sockio.h>
81 #include <netinet/arp.h>
82 #include <netinet/in.h>
83 #include <netinet/in_systm.h>
84 #include <netinet/ip.h>
85 #include <netinet/ip_icmp.h> // must come after ip.h
86 #include <netinet/udp.h>
87 #include <netinet/tcp.h>
88 #include <net/if.h>
89 #include <syslog.h>
90 #include <stropts.h>
91 #endif
92 #endif
93 #endif
94
95 #include "qemu/sockets.h"
96 #include "ui/qemu-spice.h"
97
98 #define READ_BUF_LEN 4096
99
100 /***********************************************************/
101 /* character device */
102
103 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
104 QTAILQ_HEAD_INITIALIZER(chardevs);
105
106 void qemu_chr_be_event(CharDriverState *s, int event)
107 {
108 /* Keep track if the char device is open */
109 switch (event) {
110 case CHR_EVENT_OPENED:
111 s->be_open = 1;
112 break;
113 case CHR_EVENT_CLOSED:
114 s->be_open = 0;
115 break;
116 }
117
118 if (!s->chr_event)
119 return;
120 s->chr_event(s->handler_opaque, event);
121 }
122
123 static gboolean qemu_chr_be_generic_open_bh(gpointer opaque)
124 {
125 CharDriverState *s = opaque;
126 qemu_chr_be_event(s, CHR_EVENT_OPENED);
127 s->idle_tag = 0;
128 return FALSE;
129 }
130
131 void qemu_chr_be_generic_open(CharDriverState *s)
132 {
133 if (s->idle_tag == 0) {
134 s->idle_tag = g_idle_add(qemu_chr_be_generic_open_bh, s);
135 }
136 }
137
138 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
139 {
140 return s->chr_write(s, buf, len);
141 }
142
143 int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len)
144 {
145 int offset = 0;
146 int res;
147
148 while (offset < len) {
149 do {
150 res = s->chr_write(s, buf + offset, len - offset);
151 if (res == -1 && errno == EAGAIN) {
152 g_usleep(100);
153 }
154 } while (res == -1 && errno == EAGAIN);
155
156 if (res == 0) {
157 break;
158 }
159
160 if (res < 0) {
161 return res;
162 }
163
164 offset += res;
165 }
166
167 return offset;
168 }
169
170 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
171 {
172 if (!s->chr_ioctl)
173 return -ENOTSUP;
174 return s->chr_ioctl(s, cmd, arg);
175 }
176
177 int qemu_chr_be_can_write(CharDriverState *s)
178 {
179 if (!s->chr_can_read)
180 return 0;
181 return s->chr_can_read(s->handler_opaque);
182 }
183
184 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
185 {
186 if (s->chr_read) {
187 s->chr_read(s->handler_opaque, buf, len);
188 }
189 }
190
191 int qemu_chr_fe_get_msgfd(CharDriverState *s)
192 {
193 return s->get_msgfd ? s->get_msgfd(s) : -1;
194 }
195
196 int qemu_chr_add_client(CharDriverState *s, int fd)
197 {
198 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
199 }
200
201 void qemu_chr_accept_input(CharDriverState *s)
202 {
203 if (s->chr_accept_input)
204 s->chr_accept_input(s);
205 qemu_notify_event();
206 }
207
208 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
209 {
210 char buf[READ_BUF_LEN];
211 va_list ap;
212 va_start(ap, fmt);
213 vsnprintf(buf, sizeof(buf), fmt, ap);
214 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
215 va_end(ap);
216 }
217
218 void qemu_chr_add_handlers(CharDriverState *s,
219 IOCanReadHandler *fd_can_read,
220 IOReadHandler *fd_read,
221 IOEventHandler *fd_event,
222 void *opaque)
223 {
224 int fe_open;
225
226 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
227 fe_open = 0;
228 } else {
229 fe_open = 1;
230 }
231 s->chr_can_read = fd_can_read;
232 s->chr_read = fd_read;
233 s->chr_event = fd_event;
234 s->handler_opaque = opaque;
235 if (s->chr_update_read_handler)
236 s->chr_update_read_handler(s);
237
238 if (!s->explicit_fe_open) {
239 qemu_chr_fe_set_open(s, fe_open);
240 }
241
242 /* We're connecting to an already opened device, so let's make sure we
243 also get the open event */
244 if (fe_open && s->be_open) {
245 qemu_chr_be_generic_open(s);
246 }
247 }
248
249 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
250 {
251 return len;
252 }
253
254 static CharDriverState *qemu_chr_open_null(void)
255 {
256 CharDriverState *chr;
257
258 chr = g_malloc0(sizeof(CharDriverState));
259 chr->chr_write = null_chr_write;
260 return chr;
261 }
262
263 /* MUX driver for serial I/O splitting */
264 #define MAX_MUX 4
265 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
266 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
267 typedef struct {
268 IOCanReadHandler *chr_can_read[MAX_MUX];
269 IOReadHandler *chr_read[MAX_MUX];
270 IOEventHandler *chr_event[MAX_MUX];
271 void *ext_opaque[MAX_MUX];
272 CharDriverState *drv;
273 int focus;
274 int mux_cnt;
275 int term_got_escape;
276 int max_size;
277 /* Intermediate input buffer allows to catch escape sequences even if the
278 currently active device is not accepting any input - but only until it
279 is full as well. */
280 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
281 int prod[MAX_MUX];
282 int cons[MAX_MUX];
283 int timestamps;
284 int linestart;
285 int64_t timestamps_start;
286 } MuxDriver;
287
288
289 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
290 {
291 MuxDriver *d = chr->opaque;
292 int ret;
293 if (!d->timestamps) {
294 ret = d->drv->chr_write(d->drv, buf, len);
295 } else {
296 int i;
297
298 ret = 0;
299 for (i = 0; i < len; i++) {
300 if (d->linestart) {
301 char buf1[64];
302 int64_t ti;
303 int secs;
304
305 ti = qemu_get_clock_ms(rt_clock);
306 if (d->timestamps_start == -1)
307 d->timestamps_start = ti;
308 ti -= d->timestamps_start;
309 secs = ti / 1000;
310 snprintf(buf1, sizeof(buf1),
311 "[%02d:%02d:%02d.%03d] ",
312 secs / 3600,
313 (secs / 60) % 60,
314 secs % 60,
315 (int)(ti % 1000));
316 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
317 d->linestart = 0;
318 }
319 ret += d->drv->chr_write(d->drv, buf+i, 1);
320 if (buf[i] == '\n') {
321 d->linestart = 1;
322 }
323 }
324 }
325 return ret;
326 }
327
328 static const char * const mux_help[] = {
329 "% h print this help\n\r",
330 "% x exit emulator\n\r",
331 "% s save disk data back to file (if -snapshot)\n\r",
332 "% t toggle console timestamps\n\r"
333 "% b send break (magic sysrq)\n\r",
334 "% c switch between console and monitor\n\r",
335 "% % sends %\n\r",
336 NULL
337 };
338
339 int term_escape_char = 0x01; /* ctrl-a is used for escape */
340 static void mux_print_help(CharDriverState *chr)
341 {
342 int i, j;
343 char ebuf[15] = "Escape-Char";
344 char cbuf[50] = "\n\r";
345
346 if (term_escape_char > 0 && term_escape_char < 26) {
347 snprintf(cbuf, sizeof(cbuf), "\n\r");
348 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
349 } else {
350 snprintf(cbuf, sizeof(cbuf),
351 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
352 term_escape_char);
353 }
354 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
355 for (i = 0; mux_help[i] != NULL; i++) {
356 for (j=0; mux_help[i][j] != '\0'; j++) {
357 if (mux_help[i][j] == '%')
358 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
359 else
360 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
361 }
362 }
363 }
364
365 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
366 {
367 if (d->chr_event[mux_nr])
368 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
369 }
370
371 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
372 {
373 if (d->term_got_escape) {
374 d->term_got_escape = 0;
375 if (ch == term_escape_char)
376 goto send_char;
377 switch(ch) {
378 case '?':
379 case 'h':
380 mux_print_help(chr);
381 break;
382 case 'x':
383 {
384 const char *term = "QEMU: Terminated\n\r";
385 chr->chr_write(chr,(uint8_t *)term,strlen(term));
386 exit(0);
387 break;
388 }
389 case 's':
390 bdrv_commit_all();
391 break;
392 case 'b':
393 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
394 break;
395 case 'c':
396 /* Switch to the next registered device */
397 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
398 d->focus++;
399 if (d->focus >= d->mux_cnt)
400 d->focus = 0;
401 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
402 break;
403 case 't':
404 d->timestamps = !d->timestamps;
405 d->timestamps_start = -1;
406 d->linestart = 0;
407 break;
408 }
409 } else if (ch == term_escape_char) {
410 d->term_got_escape = 1;
411 } else {
412 send_char:
413 return 1;
414 }
415 return 0;
416 }
417
418 static void mux_chr_accept_input(CharDriverState *chr)
419 {
420 MuxDriver *d = chr->opaque;
421 int m = d->focus;
422
423 while (d->prod[m] != d->cons[m] &&
424 d->chr_can_read[m] &&
425 d->chr_can_read[m](d->ext_opaque[m])) {
426 d->chr_read[m](d->ext_opaque[m],
427 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
428 }
429 }
430
431 static int mux_chr_can_read(void *opaque)
432 {
433 CharDriverState *chr = opaque;
434 MuxDriver *d = chr->opaque;
435 int m = d->focus;
436
437 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
438 return 1;
439 if (d->chr_can_read[m])
440 return d->chr_can_read[m](d->ext_opaque[m]);
441 return 0;
442 }
443
444 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
445 {
446 CharDriverState *chr = opaque;
447 MuxDriver *d = chr->opaque;
448 int m = d->focus;
449 int i;
450
451 mux_chr_accept_input (opaque);
452
453 for(i = 0; i < size; i++)
454 if (mux_proc_byte(chr, d, buf[i])) {
455 if (d->prod[m] == d->cons[m] &&
456 d->chr_can_read[m] &&
457 d->chr_can_read[m](d->ext_opaque[m]))
458 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
459 else
460 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
461 }
462 }
463
464 static void mux_chr_event(void *opaque, int event)
465 {
466 CharDriverState *chr = opaque;
467 MuxDriver *d = chr->opaque;
468 int i;
469
470 /* Send the event to all registered listeners */
471 for (i = 0; i < d->mux_cnt; i++)
472 mux_chr_send_event(d, i, event);
473 }
474
475 static void mux_chr_update_read_handler(CharDriverState *chr)
476 {
477 MuxDriver *d = chr->opaque;
478
479 if (d->mux_cnt >= MAX_MUX) {
480 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
481 return;
482 }
483 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
484 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
485 d->chr_read[d->mux_cnt] = chr->chr_read;
486 d->chr_event[d->mux_cnt] = chr->chr_event;
487 /* Fix up the real driver with mux routines */
488 if (d->mux_cnt == 0) {
489 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
490 mux_chr_event, chr);
491 }
492 if (d->focus != -1) {
493 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
494 }
495 d->focus = d->mux_cnt;
496 d->mux_cnt++;
497 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
498 }
499
500 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
501 {
502 CharDriverState *chr;
503 MuxDriver *d;
504
505 chr = g_malloc0(sizeof(CharDriverState));
506 d = g_malloc0(sizeof(MuxDriver));
507
508 chr->opaque = d;
509 d->drv = drv;
510 d->focus = -1;
511 chr->chr_write = mux_chr_write;
512 chr->chr_update_read_handler = mux_chr_update_read_handler;
513 chr->chr_accept_input = mux_chr_accept_input;
514 /* Frontend guest-open / -close notification is not support with muxes */
515 chr->chr_set_fe_open = NULL;
516
517 /* Muxes are always open on creation */
518 qemu_chr_be_generic_open(chr);
519
520 return chr;
521 }
522
523
524 #ifdef _WIN32
525 int send_all(int fd, const void *buf, int len1)
526 {
527 int ret, len;
528
529 len = len1;
530 while (len > 0) {
531 ret = send(fd, buf, len, 0);
532 if (ret < 0) {
533 errno = WSAGetLastError();
534 if (errno != WSAEWOULDBLOCK) {
535 return -1;
536 }
537 } else if (ret == 0) {
538 break;
539 } else {
540 buf += ret;
541 len -= ret;
542 }
543 }
544 return len1 - len;
545 }
546
547 #else
548
549 int send_all(int fd, const void *_buf, int len1)
550 {
551 int ret, len;
552 const uint8_t *buf = _buf;
553
554 len = len1;
555 while (len > 0) {
556 ret = write(fd, buf, len);
557 if (ret < 0) {
558 if (errno != EINTR && errno != EAGAIN)
559 return -1;
560 } else if (ret == 0) {
561 break;
562 } else {
563 buf += ret;
564 len -= ret;
565 }
566 }
567 return len1 - len;
568 }
569
570 int recv_all(int fd, void *_buf, int len1, bool single_read)
571 {
572 int ret, len;
573 uint8_t *buf = _buf;
574
575 len = len1;
576 while ((len > 0) && (ret = read(fd, buf, len)) != 0) {
577 if (ret < 0) {
578 if (errno != EINTR && errno != EAGAIN) {
579 return -1;
580 }
581 continue;
582 } else {
583 if (single_read) {
584 return ret;
585 }
586 buf += ret;
587 len -= ret;
588 }
589 }
590 return len1 - len;
591 }
592
593 #endif /* !_WIN32 */
594
595 typedef struct IOWatchPoll
596 {
597 GSource parent;
598
599 GIOChannel *channel;
600 GSource *src;
601
602 IOCanReadHandler *fd_can_read;
603 GSourceFunc fd_read;
604 void *opaque;
605 } IOWatchPoll;
606
607 static IOWatchPoll *io_watch_poll_from_source(GSource *source)
608 {
609 return container_of(source, IOWatchPoll, parent);
610 }
611
612 static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_)
613 {
614 IOWatchPoll *iwp = io_watch_poll_from_source(source);
615 bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
616 bool was_active = iwp->src != NULL;
617 if (was_active == now_active) {
618 return FALSE;
619 }
620
621 if (now_active) {
622 iwp->src = g_io_create_watch(iwp->channel, G_IO_IN | G_IO_ERR | G_IO_HUP);
623 g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
624 g_source_attach(iwp->src, NULL);
625 } else {
626 g_source_destroy(iwp->src);
627 g_source_unref(iwp->src);
628 iwp->src = NULL;
629 }
630 return FALSE;
631 }
632
633 static gboolean io_watch_poll_check(GSource *source)
634 {
635 return FALSE;
636 }
637
638 static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
639 gpointer user_data)
640 {
641 abort();
642 }
643
644 static void io_watch_poll_finalize(GSource *source)
645 {
646 IOWatchPoll *iwp = io_watch_poll_from_source(source);
647 g_source_destroy(iwp->src);
648 g_source_unref(iwp->src);
649 iwp->src = NULL;
650 }
651
652 static GSourceFuncs io_watch_poll_funcs = {
653 .prepare = io_watch_poll_prepare,
654 .check = io_watch_poll_check,
655 .dispatch = io_watch_poll_dispatch,
656 .finalize = io_watch_poll_finalize,
657 };
658
659 /* Can only be used for read */
660 static guint io_add_watch_poll(GIOChannel *channel,
661 IOCanReadHandler *fd_can_read,
662 GIOFunc fd_read,
663 gpointer user_data)
664 {
665 IOWatchPoll *iwp;
666
667 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll));
668 iwp->fd_can_read = fd_can_read;
669 iwp->opaque = user_data;
670 iwp->channel = channel;
671 iwp->fd_read = (GSourceFunc) fd_read;
672 iwp->src = NULL;
673
674 return g_source_attach(&iwp->parent, NULL);
675 }
676
677 #ifndef _WIN32
678 static GIOChannel *io_channel_from_fd(int fd)
679 {
680 GIOChannel *chan;
681
682 if (fd == -1) {
683 return NULL;
684 }
685
686 chan = g_io_channel_unix_new(fd);
687
688 g_io_channel_set_encoding(chan, NULL, NULL);
689 g_io_channel_set_buffered(chan, FALSE);
690
691 return chan;
692 }
693 #endif
694
695 static GIOChannel *io_channel_from_socket(int fd)
696 {
697 GIOChannel *chan;
698
699 if (fd == -1) {
700 return NULL;
701 }
702
703 #ifdef _WIN32
704 chan = g_io_channel_win32_new_socket(fd);
705 #else
706 chan = g_io_channel_unix_new(fd);
707 #endif
708
709 g_io_channel_set_encoding(chan, NULL, NULL);
710 g_io_channel_set_buffered(chan, FALSE);
711
712 return chan;
713 }
714
715 static int io_channel_send(GIOChannel *fd, const void *buf, size_t len)
716 {
717 GIOStatus status;
718 size_t offset;
719
720 offset = 0;
721 while (offset < len) {
722 gsize bytes_written;
723
724 status = g_io_channel_write_chars(fd, buf + offset, len - offset,
725 &bytes_written, NULL);
726 if (status != G_IO_STATUS_NORMAL) {
727 if (status == G_IO_STATUS_AGAIN) {
728 /* If we've written any data, return a partial write. */
729 if (offset) {
730 break;
731 }
732 errno = EAGAIN;
733 } else {
734 errno = EINVAL;
735 }
736
737 return -1;
738 } else if (status == G_IO_STATUS_EOF) {
739 break;
740 }
741
742 offset += bytes_written;
743 }
744
745 return offset;
746 }
747
748 #ifndef _WIN32
749
750 typedef struct FDCharDriver {
751 CharDriverState *chr;
752 GIOChannel *fd_in, *fd_out;
753 guint fd_in_tag;
754 int max_size;
755 QTAILQ_ENTRY(FDCharDriver) node;
756 } FDCharDriver;
757
758 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
759 {
760 FDCharDriver *s = chr->opaque;
761
762 return io_channel_send(s->fd_out, buf, len);
763 }
764
765 static gboolean fd_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
766 {
767 CharDriverState *chr = opaque;
768 FDCharDriver *s = chr->opaque;
769 int len;
770 uint8_t buf[READ_BUF_LEN];
771 GIOStatus status;
772 gsize bytes_read;
773
774 len = sizeof(buf);
775 if (len > s->max_size) {
776 len = s->max_size;
777 }
778 if (len == 0) {
779 return FALSE;
780 }
781
782 status = g_io_channel_read_chars(chan, (gchar *)buf,
783 len, &bytes_read, NULL);
784 if (status == G_IO_STATUS_EOF) {
785 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
786 return FALSE;
787 }
788 if (status == G_IO_STATUS_NORMAL) {
789 qemu_chr_be_write(chr, buf, bytes_read);
790 }
791
792 return TRUE;
793 }
794
795 static int fd_chr_read_poll(void *opaque)
796 {
797 CharDriverState *chr = opaque;
798 FDCharDriver *s = chr->opaque;
799
800 s->max_size = qemu_chr_be_can_write(chr);
801 return s->max_size;
802 }
803
804 static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
805 {
806 FDCharDriver *s = chr->opaque;
807 return g_io_create_watch(s->fd_out, cond);
808 }
809
810 static void fd_chr_update_read_handler(CharDriverState *chr)
811 {
812 FDCharDriver *s = chr->opaque;
813
814 if (s->fd_in_tag) {
815 g_source_remove(s->fd_in_tag);
816 }
817
818 if (s->fd_in) {
819 s->fd_in_tag = io_add_watch_poll(s->fd_in, fd_chr_read_poll, fd_chr_read, chr);
820 }
821 }
822
823 static void fd_chr_close(struct CharDriverState *chr)
824 {
825 FDCharDriver *s = chr->opaque;
826
827 if (s->fd_in_tag) {
828 g_source_remove(s->fd_in_tag);
829 s->fd_in_tag = 0;
830 }
831
832 if (s->fd_in) {
833 g_io_channel_unref(s->fd_in);
834 }
835 if (s->fd_out) {
836 g_io_channel_unref(s->fd_out);
837 }
838
839 g_free(s);
840 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
841 }
842
843 /* open a character device to a unix fd */
844 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
845 {
846 CharDriverState *chr;
847 FDCharDriver *s;
848
849 chr = g_malloc0(sizeof(CharDriverState));
850 s = g_malloc0(sizeof(FDCharDriver));
851 s->fd_in = io_channel_from_fd(fd_in);
852 s->fd_out = io_channel_from_fd(fd_out);
853 fcntl(fd_out, F_SETFL, O_NONBLOCK);
854 s->chr = chr;
855 chr->opaque = s;
856 chr->chr_add_watch = fd_chr_add_watch;
857 chr->chr_write = fd_chr_write;
858 chr->chr_update_read_handler = fd_chr_update_read_handler;
859 chr->chr_close = fd_chr_close;
860
861 qemu_chr_be_generic_open(chr);
862
863 return chr;
864 }
865
866 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
867 {
868 int fd_in, fd_out;
869 char filename_in[256], filename_out[256];
870 const char *filename = opts->device;
871
872 if (filename == NULL) {
873 fprintf(stderr, "chardev: pipe: no filename given\n");
874 return NULL;
875 }
876
877 snprintf(filename_in, 256, "%s.in", filename);
878 snprintf(filename_out, 256, "%s.out", filename);
879 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
880 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
881 if (fd_in < 0 || fd_out < 0) {
882 if (fd_in >= 0)
883 close(fd_in);
884 if (fd_out >= 0)
885 close(fd_out);
886 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
887 if (fd_in < 0) {
888 return NULL;
889 }
890 }
891 return qemu_chr_open_fd(fd_in, fd_out);
892 }
893
894 /* init terminal so that we can grab keys */
895 static struct termios oldtty;
896 static int old_fd0_flags;
897 static bool stdio_allow_signal;
898
899 static void term_exit(void)
900 {
901 tcsetattr (0, TCSANOW, &oldtty);
902 fcntl(0, F_SETFL, old_fd0_flags);
903 }
904
905 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
906 {
907 struct termios tty;
908
909 tty = oldtty;
910 if (!echo) {
911 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
912 |INLCR|IGNCR|ICRNL|IXON);
913 tty.c_oflag |= OPOST;
914 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
915 tty.c_cflag &= ~(CSIZE|PARENB);
916 tty.c_cflag |= CS8;
917 tty.c_cc[VMIN] = 1;
918 tty.c_cc[VTIME] = 0;
919 }
920 /* if graphical mode, we allow Ctrl-C handling */
921 if (!stdio_allow_signal)
922 tty.c_lflag &= ~ISIG;
923
924 tcsetattr (0, TCSANOW, &tty);
925 }
926
927 static void qemu_chr_close_stdio(struct CharDriverState *chr)
928 {
929 term_exit();
930 fd_chr_close(chr);
931 }
932
933 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
934 {
935 CharDriverState *chr;
936
937 if (is_daemonized()) {
938 error_report("cannot use stdio with -daemonize");
939 return NULL;
940 }
941 old_fd0_flags = fcntl(0, F_GETFL);
942 tcgetattr (0, &oldtty);
943 fcntl(0, F_SETFL, O_NONBLOCK);
944 atexit(term_exit);
945
946 chr = qemu_chr_open_fd(0, 1);
947 chr->chr_close = qemu_chr_close_stdio;
948 chr->chr_set_echo = qemu_chr_set_echo_stdio;
949 stdio_allow_signal = display_type != DT_NOGRAPHIC;
950 if (opts->has_signal) {
951 stdio_allow_signal = opts->signal;
952 }
953 qemu_chr_fe_set_echo(chr, false);
954
955 return chr;
956 }
957
958 #ifdef __sun__
959 /* Once Solaris has openpty(), this is going to be removed. */
960 static int openpty(int *amaster, int *aslave, char *name,
961 struct termios *termp, struct winsize *winp)
962 {
963 const char *slave;
964 int mfd = -1, sfd = -1;
965
966 *amaster = *aslave = -1;
967
968 mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
969 if (mfd < 0)
970 goto err;
971
972 if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
973 goto err;
974
975 if ((slave = ptsname(mfd)) == NULL)
976 goto err;
977
978 if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
979 goto err;
980
981 if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
982 (termp != NULL && tcgetattr(sfd, termp) < 0))
983 goto err;
984
985 if (amaster)
986 *amaster = mfd;
987 if (aslave)
988 *aslave = sfd;
989 if (winp)
990 ioctl(sfd, TIOCSWINSZ, winp);
991
992 return 0;
993
994 err:
995 if (sfd != -1)
996 close(sfd);
997 close(mfd);
998 return -1;
999 }
1000
1001 static void cfmakeraw (struct termios *termios_p)
1002 {
1003 termios_p->c_iflag &=
1004 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
1005 termios_p->c_oflag &= ~OPOST;
1006 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
1007 termios_p->c_cflag &= ~(CSIZE|PARENB);
1008 termios_p->c_cflag |= CS8;
1009
1010 termios_p->c_cc[VMIN] = 0;
1011 termios_p->c_cc[VTIME] = 0;
1012 }
1013 #endif
1014
1015 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1016 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
1017 || defined(__GLIBC__)
1018
1019 #define HAVE_CHARDEV_TTY 1
1020
1021 typedef struct {
1022 GIOChannel *fd;
1023 guint fd_tag;
1024 int connected;
1025 int polling;
1026 int read_bytes;
1027 guint timer_tag;
1028 } PtyCharDriver;
1029
1030 static void pty_chr_update_read_handler(CharDriverState *chr);
1031 static void pty_chr_state(CharDriverState *chr, int connected);
1032
1033 static gboolean pty_chr_timer(gpointer opaque)
1034 {
1035 struct CharDriverState *chr = opaque;
1036 PtyCharDriver *s = chr->opaque;
1037
1038 if (s->connected) {
1039 goto out;
1040 }
1041 if (s->polling) {
1042 /* If we arrive here without polling being cleared due
1043 * read returning -EIO, then we are (re-)connected */
1044 pty_chr_state(chr, 1);
1045 goto out;
1046 }
1047
1048 /* Next poll ... */
1049 pty_chr_update_read_handler(chr);
1050
1051 out:
1052 return FALSE;
1053 }
1054
1055 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1056 {
1057 PtyCharDriver *s = chr->opaque;
1058
1059 if (s->timer_tag) {
1060 g_source_remove(s->timer_tag);
1061 s->timer_tag = 0;
1062 }
1063
1064 if (ms == 1000) {
1065 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1066 } else {
1067 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1068 }
1069 }
1070
1071 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1072 {
1073 PtyCharDriver *s = chr->opaque;
1074
1075 if (!s->connected) {
1076 /* guest sends data, check for (re-)connect */
1077 pty_chr_update_read_handler(chr);
1078 return 0;
1079 }
1080 return io_channel_send(s->fd, buf, len);
1081 }
1082
1083 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1084 {
1085 PtyCharDriver *s = chr->opaque;
1086 return g_io_create_watch(s->fd, cond);
1087 }
1088
1089 static int pty_chr_read_poll(void *opaque)
1090 {
1091 CharDriverState *chr = opaque;
1092 PtyCharDriver *s = chr->opaque;
1093
1094 s->read_bytes = qemu_chr_be_can_write(chr);
1095 return s->read_bytes;
1096 }
1097
1098 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1099 {
1100 CharDriverState *chr = opaque;
1101 PtyCharDriver *s = chr->opaque;
1102 gsize size, len;
1103 uint8_t buf[READ_BUF_LEN];
1104 GIOStatus status;
1105
1106 len = sizeof(buf);
1107 if (len > s->read_bytes)
1108 len = s->read_bytes;
1109 if (len == 0)
1110 return FALSE;
1111 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1112 if (status != G_IO_STATUS_NORMAL) {
1113 pty_chr_state(chr, 0);
1114 return FALSE;
1115 } else {
1116 pty_chr_state(chr, 1);
1117 qemu_chr_be_write(chr, buf, size);
1118 }
1119 return TRUE;
1120 }
1121
1122 static void pty_chr_update_read_handler(CharDriverState *chr)
1123 {
1124 PtyCharDriver *s = chr->opaque;
1125
1126 if (s->fd_tag) {
1127 g_source_remove(s->fd_tag);
1128 }
1129
1130 s->fd_tag = io_add_watch_poll(s->fd, pty_chr_read_poll, pty_chr_read, chr);
1131 s->polling = 1;
1132 /*
1133 * Short timeout here: just need wait long enougth that qemu makes
1134 * it through the poll loop once. When reconnected we want a
1135 * short timeout so we notice it almost instantly. Otherwise
1136 * read() gives us -EIO instantly, making pty_chr_state() reset the
1137 * timeout to the normal (much longer) poll interval before the
1138 * timer triggers.
1139 */
1140 pty_chr_rearm_timer(chr, 10);
1141 }
1142
1143 static void pty_chr_state(CharDriverState *chr, int connected)
1144 {
1145 PtyCharDriver *s = chr->opaque;
1146
1147 if (!connected) {
1148 g_source_remove(s->fd_tag);
1149 s->fd_tag = 0;
1150 s->connected = 0;
1151 s->polling = 0;
1152 /* (re-)connect poll interval for idle guests: once per second.
1153 * We check more frequently in case the guests sends data to
1154 * the virtual device linked to our pty. */
1155 pty_chr_rearm_timer(chr, 1000);
1156 } else {
1157 if (!s->connected)
1158 qemu_chr_be_generic_open(chr);
1159 s->connected = 1;
1160 }
1161 }
1162
1163
1164 static void pty_chr_close(struct CharDriverState *chr)
1165 {
1166 PtyCharDriver *s = chr->opaque;
1167 int fd;
1168
1169 if (s->fd_tag) {
1170 g_source_remove(s->fd_tag);
1171 }
1172 fd = g_io_channel_unix_get_fd(s->fd);
1173 g_io_channel_unref(s->fd);
1174 close(fd);
1175 if (s->timer_tag) {
1176 g_source_remove(s->timer_tag);
1177 }
1178 g_free(s);
1179 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1180 }
1181
1182 static CharDriverState *qemu_chr_open_pty(const char *id,
1183 ChardevReturn *ret)
1184 {
1185 CharDriverState *chr;
1186 PtyCharDriver *s;
1187 struct termios tty;
1188 int master_fd, slave_fd;
1189 #if defined(__OpenBSD__) || defined(__DragonFly__)
1190 char pty_name[PATH_MAX];
1191 #define q_ptsname(x) pty_name
1192 #else
1193 char *pty_name = NULL;
1194 #define q_ptsname(x) ptsname(x)
1195 #endif
1196
1197 if (openpty(&master_fd, &slave_fd, pty_name, NULL, NULL) < 0) {
1198 return NULL;
1199 }
1200
1201 /* Set raw attributes on the pty. */
1202 tcgetattr(slave_fd, &tty);
1203 cfmakeraw(&tty);
1204 tcsetattr(slave_fd, TCSAFLUSH, &tty);
1205 close(slave_fd);
1206
1207 chr = g_malloc0(sizeof(CharDriverState));
1208
1209 chr->filename = g_strdup_printf("pty:%s", q_ptsname(master_fd));
1210 ret->pty = g_strdup(q_ptsname(master_fd));
1211 ret->has_pty = true;
1212
1213 fprintf(stderr, "char device redirected to %s (label %s)\n",
1214 q_ptsname(master_fd), id);
1215
1216 s = g_malloc0(sizeof(PtyCharDriver));
1217 chr->opaque = s;
1218 chr->chr_write = pty_chr_write;
1219 chr->chr_update_read_handler = pty_chr_update_read_handler;
1220 chr->chr_close = pty_chr_close;
1221 chr->chr_add_watch = pty_chr_add_watch;
1222
1223 s->fd = io_channel_from_fd(master_fd);
1224 s->timer_tag = 0;
1225
1226 return chr;
1227 }
1228
1229 static void tty_serial_init(int fd, int speed,
1230 int parity, int data_bits, int stop_bits)
1231 {
1232 struct termios tty;
1233 speed_t spd;
1234
1235 #if 0
1236 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1237 speed, parity, data_bits, stop_bits);
1238 #endif
1239 tcgetattr (fd, &tty);
1240
1241 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1242 speed = speed * 10 / 11;
1243 do {
1244 check_speed(50);
1245 check_speed(75);
1246 check_speed(110);
1247 check_speed(134);
1248 check_speed(150);
1249 check_speed(200);
1250 check_speed(300);
1251 check_speed(600);
1252 check_speed(1200);
1253 check_speed(1800);
1254 check_speed(2400);
1255 check_speed(4800);
1256 check_speed(9600);
1257 check_speed(19200);
1258 check_speed(38400);
1259 /* Non-Posix values follow. They may be unsupported on some systems. */
1260 check_speed(57600);
1261 check_speed(115200);
1262 #ifdef B230400
1263 check_speed(230400);
1264 #endif
1265 #ifdef B460800
1266 check_speed(460800);
1267 #endif
1268 #ifdef B500000
1269 check_speed(500000);
1270 #endif
1271 #ifdef B576000
1272 check_speed(576000);
1273 #endif
1274 #ifdef B921600
1275 check_speed(921600);
1276 #endif
1277 #ifdef B1000000
1278 check_speed(1000000);
1279 #endif
1280 #ifdef B1152000
1281 check_speed(1152000);
1282 #endif
1283 #ifdef B1500000
1284 check_speed(1500000);
1285 #endif
1286 #ifdef B2000000
1287 check_speed(2000000);
1288 #endif
1289 #ifdef B2500000
1290 check_speed(2500000);
1291 #endif
1292 #ifdef B3000000
1293 check_speed(3000000);
1294 #endif
1295 #ifdef B3500000
1296 check_speed(3500000);
1297 #endif
1298 #ifdef B4000000
1299 check_speed(4000000);
1300 #endif
1301 spd = B115200;
1302 } while (0);
1303
1304 cfsetispeed(&tty, spd);
1305 cfsetospeed(&tty, spd);
1306
1307 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1308 |INLCR|IGNCR|ICRNL|IXON);
1309 tty.c_oflag |= OPOST;
1310 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1311 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1312 switch(data_bits) {
1313 default:
1314 case 8:
1315 tty.c_cflag |= CS8;
1316 break;
1317 case 7:
1318 tty.c_cflag |= CS7;
1319 break;
1320 case 6:
1321 tty.c_cflag |= CS6;
1322 break;
1323 case 5:
1324 tty.c_cflag |= CS5;
1325 break;
1326 }
1327 switch(parity) {
1328 default:
1329 case 'N':
1330 break;
1331 case 'E':
1332 tty.c_cflag |= PARENB;
1333 break;
1334 case 'O':
1335 tty.c_cflag |= PARENB | PARODD;
1336 break;
1337 }
1338 if (stop_bits == 2)
1339 tty.c_cflag |= CSTOPB;
1340
1341 tcsetattr (fd, TCSANOW, &tty);
1342 }
1343
1344 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1345 {
1346 FDCharDriver *s = chr->opaque;
1347
1348 switch(cmd) {
1349 case CHR_IOCTL_SERIAL_SET_PARAMS:
1350 {
1351 QEMUSerialSetParams *ssp = arg;
1352 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1353 ssp->speed, ssp->parity,
1354 ssp->data_bits, ssp->stop_bits);
1355 }
1356 break;
1357 case CHR_IOCTL_SERIAL_SET_BREAK:
1358 {
1359 int enable = *(int *)arg;
1360 if (enable) {
1361 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1362 }
1363 }
1364 break;
1365 case CHR_IOCTL_SERIAL_GET_TIOCM:
1366 {
1367 int sarg = 0;
1368 int *targ = (int *)arg;
1369 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1370 *targ = 0;
1371 if (sarg & TIOCM_CTS)
1372 *targ |= CHR_TIOCM_CTS;
1373 if (sarg & TIOCM_CAR)
1374 *targ |= CHR_TIOCM_CAR;
1375 if (sarg & TIOCM_DSR)
1376 *targ |= CHR_TIOCM_DSR;
1377 if (sarg & TIOCM_RI)
1378 *targ |= CHR_TIOCM_RI;
1379 if (sarg & TIOCM_DTR)
1380 *targ |= CHR_TIOCM_DTR;
1381 if (sarg & TIOCM_RTS)
1382 *targ |= CHR_TIOCM_RTS;
1383 }
1384 break;
1385 case CHR_IOCTL_SERIAL_SET_TIOCM:
1386 {
1387 int sarg = *(int *)arg;
1388 int targ = 0;
1389 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1390 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1391 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1392 if (sarg & CHR_TIOCM_CTS)
1393 targ |= TIOCM_CTS;
1394 if (sarg & CHR_TIOCM_CAR)
1395 targ |= TIOCM_CAR;
1396 if (sarg & CHR_TIOCM_DSR)
1397 targ |= TIOCM_DSR;
1398 if (sarg & CHR_TIOCM_RI)
1399 targ |= TIOCM_RI;
1400 if (sarg & CHR_TIOCM_DTR)
1401 targ |= TIOCM_DTR;
1402 if (sarg & CHR_TIOCM_RTS)
1403 targ |= TIOCM_RTS;
1404 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1405 }
1406 break;
1407 default:
1408 return -ENOTSUP;
1409 }
1410 return 0;
1411 }
1412
1413 static void qemu_chr_close_tty(CharDriverState *chr)
1414 {
1415 FDCharDriver *s = chr->opaque;
1416 int fd = -1;
1417
1418 if (s) {
1419 fd = g_io_channel_unix_get_fd(s->fd_in);
1420 }
1421
1422 fd_chr_close(chr);
1423
1424 if (fd >= 0) {
1425 close(fd);
1426 }
1427 }
1428
1429 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1430 {
1431 CharDriverState *chr;
1432
1433 tty_serial_init(fd, 115200, 'N', 8, 1);
1434 chr = qemu_chr_open_fd(fd, fd);
1435 chr->chr_ioctl = tty_serial_ioctl;
1436 chr->chr_close = qemu_chr_close_tty;
1437 return chr;
1438 }
1439 #endif /* __linux__ || __sun__ */
1440
1441 #if defined(__linux__)
1442
1443 #define HAVE_CHARDEV_PARPORT 1
1444
1445 typedef struct {
1446 int fd;
1447 int mode;
1448 } ParallelCharDriver;
1449
1450 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1451 {
1452 if (s->mode != mode) {
1453 int m = mode;
1454 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1455 return 0;
1456 s->mode = mode;
1457 }
1458 return 1;
1459 }
1460
1461 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1462 {
1463 ParallelCharDriver *drv = chr->opaque;
1464 int fd = drv->fd;
1465 uint8_t b;
1466
1467 switch(cmd) {
1468 case CHR_IOCTL_PP_READ_DATA:
1469 if (ioctl(fd, PPRDATA, &b) < 0)
1470 return -ENOTSUP;
1471 *(uint8_t *)arg = b;
1472 break;
1473 case CHR_IOCTL_PP_WRITE_DATA:
1474 b = *(uint8_t *)arg;
1475 if (ioctl(fd, PPWDATA, &b) < 0)
1476 return -ENOTSUP;
1477 break;
1478 case CHR_IOCTL_PP_READ_CONTROL:
1479 if (ioctl(fd, PPRCONTROL, &b) < 0)
1480 return -ENOTSUP;
1481 /* Linux gives only the lowest bits, and no way to know data
1482 direction! For better compatibility set the fixed upper
1483 bits. */
1484 *(uint8_t *)arg = b | 0xc0;
1485 break;
1486 case CHR_IOCTL_PP_WRITE_CONTROL:
1487 b = *(uint8_t *)arg;
1488 if (ioctl(fd, PPWCONTROL, &b) < 0)
1489 return -ENOTSUP;
1490 break;
1491 case CHR_IOCTL_PP_READ_STATUS:
1492 if (ioctl(fd, PPRSTATUS, &b) < 0)
1493 return -ENOTSUP;
1494 *(uint8_t *)arg = b;
1495 break;
1496 case CHR_IOCTL_PP_DATA_DIR:
1497 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1498 return -ENOTSUP;
1499 break;
1500 case CHR_IOCTL_PP_EPP_READ_ADDR:
1501 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1502 struct ParallelIOArg *parg = arg;
1503 int n = read(fd, parg->buffer, parg->count);
1504 if (n != parg->count) {
1505 return -EIO;
1506 }
1507 }
1508 break;
1509 case CHR_IOCTL_PP_EPP_READ:
1510 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1511 struct ParallelIOArg *parg = arg;
1512 int n = read(fd, parg->buffer, parg->count);
1513 if (n != parg->count) {
1514 return -EIO;
1515 }
1516 }
1517 break;
1518 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1519 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1520 struct ParallelIOArg *parg = arg;
1521 int n = write(fd, parg->buffer, parg->count);
1522 if (n != parg->count) {
1523 return -EIO;
1524 }
1525 }
1526 break;
1527 case CHR_IOCTL_PP_EPP_WRITE:
1528 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1529 struct ParallelIOArg *parg = arg;
1530 int n = write(fd, parg->buffer, parg->count);
1531 if (n != parg->count) {
1532 return -EIO;
1533 }
1534 }
1535 break;
1536 default:
1537 return -ENOTSUP;
1538 }
1539 return 0;
1540 }
1541
1542 static void pp_close(CharDriverState *chr)
1543 {
1544 ParallelCharDriver *drv = chr->opaque;
1545 int fd = drv->fd;
1546
1547 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1548 ioctl(fd, PPRELEASE);
1549 close(fd);
1550 g_free(drv);
1551 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1552 }
1553
1554 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1555 {
1556 CharDriverState *chr;
1557 ParallelCharDriver *drv;
1558
1559 if (ioctl(fd, PPCLAIM) < 0) {
1560 close(fd);
1561 return NULL;
1562 }
1563
1564 drv = g_malloc0(sizeof(ParallelCharDriver));
1565 drv->fd = fd;
1566 drv->mode = IEEE1284_MODE_COMPAT;
1567
1568 chr = g_malloc0(sizeof(CharDriverState));
1569 chr->chr_write = null_chr_write;
1570 chr->chr_ioctl = pp_ioctl;
1571 chr->chr_close = pp_close;
1572 chr->opaque = drv;
1573
1574 qemu_chr_be_generic_open(chr);
1575
1576 return chr;
1577 }
1578 #endif /* __linux__ */
1579
1580 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1581
1582 #define HAVE_CHARDEV_PARPORT 1
1583
1584 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1585 {
1586 int fd = (int)(intptr_t)chr->opaque;
1587 uint8_t b;
1588
1589 switch(cmd) {
1590 case CHR_IOCTL_PP_READ_DATA:
1591 if (ioctl(fd, PPIGDATA, &b) < 0)
1592 return -ENOTSUP;
1593 *(uint8_t *)arg = b;
1594 break;
1595 case CHR_IOCTL_PP_WRITE_DATA:
1596 b = *(uint8_t *)arg;
1597 if (ioctl(fd, PPISDATA, &b) < 0)
1598 return -ENOTSUP;
1599 break;
1600 case CHR_IOCTL_PP_READ_CONTROL:
1601 if (ioctl(fd, PPIGCTRL, &b) < 0)
1602 return -ENOTSUP;
1603 *(uint8_t *)arg = b;
1604 break;
1605 case CHR_IOCTL_PP_WRITE_CONTROL:
1606 b = *(uint8_t *)arg;
1607 if (ioctl(fd, PPISCTRL, &b) < 0)
1608 return -ENOTSUP;
1609 break;
1610 case CHR_IOCTL_PP_READ_STATUS:
1611 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1612 return -ENOTSUP;
1613 *(uint8_t *)arg = b;
1614 break;
1615 default:
1616 return -ENOTSUP;
1617 }
1618 return 0;
1619 }
1620
1621 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1622 {
1623 CharDriverState *chr;
1624
1625 chr = g_malloc0(sizeof(CharDriverState));
1626 chr->opaque = (void *)(intptr_t)fd;
1627 chr->chr_write = null_chr_write;
1628 chr->chr_ioctl = pp_ioctl;
1629 return chr;
1630 }
1631 #endif
1632
1633 #else /* _WIN32 */
1634
1635 typedef struct {
1636 int max_size;
1637 HANDLE hcom, hrecv, hsend;
1638 OVERLAPPED orecv, osend;
1639 BOOL fpipe;
1640 DWORD len;
1641 } WinCharState;
1642
1643 typedef struct {
1644 HANDLE hStdIn;
1645 HANDLE hInputReadyEvent;
1646 HANDLE hInputDoneEvent;
1647 HANDLE hInputThread;
1648 uint8_t win_stdio_buf;
1649 } WinStdioCharState;
1650
1651 #define NSENDBUF 2048
1652 #define NRECVBUF 2048
1653 #define MAXCONNECT 1
1654 #define NTIMEOUT 5000
1655
1656 static int win_chr_poll(void *opaque);
1657 static int win_chr_pipe_poll(void *opaque);
1658
1659 static void win_chr_close(CharDriverState *chr)
1660 {
1661 WinCharState *s = chr->opaque;
1662
1663 if (s->hsend) {
1664 CloseHandle(s->hsend);
1665 s->hsend = NULL;
1666 }
1667 if (s->hrecv) {
1668 CloseHandle(s->hrecv);
1669 s->hrecv = NULL;
1670 }
1671 if (s->hcom) {
1672 CloseHandle(s->hcom);
1673 s->hcom = NULL;
1674 }
1675 if (s->fpipe)
1676 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1677 else
1678 qemu_del_polling_cb(win_chr_poll, chr);
1679
1680 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1681 }
1682
1683 static int win_chr_init(CharDriverState *chr, const char *filename)
1684 {
1685 WinCharState *s = chr->opaque;
1686 COMMCONFIG comcfg;
1687 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1688 COMSTAT comstat;
1689 DWORD size;
1690 DWORD err;
1691
1692 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1693 if (!s->hsend) {
1694 fprintf(stderr, "Failed CreateEvent\n");
1695 goto fail;
1696 }
1697 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1698 if (!s->hrecv) {
1699 fprintf(stderr, "Failed CreateEvent\n");
1700 goto fail;
1701 }
1702
1703 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1704 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1705 if (s->hcom == INVALID_HANDLE_VALUE) {
1706 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1707 s->hcom = NULL;
1708 goto fail;
1709 }
1710
1711 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1712 fprintf(stderr, "Failed SetupComm\n");
1713 goto fail;
1714 }
1715
1716 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1717 size = sizeof(COMMCONFIG);
1718 GetDefaultCommConfig(filename, &comcfg, &size);
1719 comcfg.dcb.DCBlength = sizeof(DCB);
1720 CommConfigDialog(filename, NULL, &comcfg);
1721
1722 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1723 fprintf(stderr, "Failed SetCommState\n");
1724 goto fail;
1725 }
1726
1727 if (!SetCommMask(s->hcom, EV_ERR)) {
1728 fprintf(stderr, "Failed SetCommMask\n");
1729 goto fail;
1730 }
1731
1732 cto.ReadIntervalTimeout = MAXDWORD;
1733 if (!SetCommTimeouts(s->hcom, &cto)) {
1734 fprintf(stderr, "Failed SetCommTimeouts\n");
1735 goto fail;
1736 }
1737
1738 if (!ClearCommError(s->hcom, &err, &comstat)) {
1739 fprintf(stderr, "Failed ClearCommError\n");
1740 goto fail;
1741 }
1742 qemu_add_polling_cb(win_chr_poll, chr);
1743 return 0;
1744
1745 fail:
1746 win_chr_close(chr);
1747 return -1;
1748 }
1749
1750 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1751 {
1752 WinCharState *s = chr->opaque;
1753 DWORD len, ret, size, err;
1754
1755 len = len1;
1756 ZeroMemory(&s->osend, sizeof(s->osend));
1757 s->osend.hEvent = s->hsend;
1758 while (len > 0) {
1759 if (s->hsend)
1760 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1761 else
1762 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1763 if (!ret) {
1764 err = GetLastError();
1765 if (err == ERROR_IO_PENDING) {
1766 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1767 if (ret) {
1768 buf += size;
1769 len -= size;
1770 } else {
1771 break;
1772 }
1773 } else {
1774 break;
1775 }
1776 } else {
1777 buf += size;
1778 len -= size;
1779 }
1780 }
1781 return len1 - len;
1782 }
1783
1784 static int win_chr_read_poll(CharDriverState *chr)
1785 {
1786 WinCharState *s = chr->opaque;
1787
1788 s->max_size = qemu_chr_be_can_write(chr);
1789 return s->max_size;
1790 }
1791
1792 static void win_chr_readfile(CharDriverState *chr)
1793 {
1794 WinCharState *s = chr->opaque;
1795 int ret, err;
1796 uint8_t buf[READ_BUF_LEN];
1797 DWORD size;
1798
1799 ZeroMemory(&s->orecv, sizeof(s->orecv));
1800 s->orecv.hEvent = s->hrecv;
1801 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1802 if (!ret) {
1803 err = GetLastError();
1804 if (err == ERROR_IO_PENDING) {
1805 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1806 }
1807 }
1808
1809 if (size > 0) {
1810 qemu_chr_be_write(chr, buf, size);
1811 }
1812 }
1813
1814 static void win_chr_read(CharDriverState *chr)
1815 {
1816 WinCharState *s = chr->opaque;
1817
1818 if (s->len > s->max_size)
1819 s->len = s->max_size;
1820 if (s->len == 0)
1821 return;
1822
1823 win_chr_readfile(chr);
1824 }
1825
1826 static int win_chr_poll(void *opaque)
1827 {
1828 CharDriverState *chr = opaque;
1829 WinCharState *s = chr->opaque;
1830 COMSTAT status;
1831 DWORD comerr;
1832
1833 ClearCommError(s->hcom, &comerr, &status);
1834 if (status.cbInQue > 0) {
1835 s->len = status.cbInQue;
1836 win_chr_read_poll(chr);
1837 win_chr_read(chr);
1838 return 1;
1839 }
1840 return 0;
1841 }
1842
1843 static CharDriverState *qemu_chr_open_win_path(const char *filename)
1844 {
1845 CharDriverState *chr;
1846 WinCharState *s;
1847
1848 chr = g_malloc0(sizeof(CharDriverState));
1849 s = g_malloc0(sizeof(WinCharState));
1850 chr->opaque = s;
1851 chr->chr_write = win_chr_write;
1852 chr->chr_close = win_chr_close;
1853
1854 if (win_chr_init(chr, filename) < 0) {
1855 g_free(s);
1856 g_free(chr);
1857 return NULL;
1858 }
1859 qemu_chr_be_generic_open(chr);
1860 return chr;
1861 }
1862
1863 static int win_chr_pipe_poll(void *opaque)
1864 {
1865 CharDriverState *chr = opaque;
1866 WinCharState *s = chr->opaque;
1867 DWORD size;
1868
1869 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1870 if (size > 0) {
1871 s->len = size;
1872 win_chr_read_poll(chr);
1873 win_chr_read(chr);
1874 return 1;
1875 }
1876 return 0;
1877 }
1878
1879 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1880 {
1881 WinCharState *s = chr->opaque;
1882 OVERLAPPED ov;
1883 int ret;
1884 DWORD size;
1885 char openname[256];
1886
1887 s->fpipe = TRUE;
1888
1889 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1890 if (!s->hsend) {
1891 fprintf(stderr, "Failed CreateEvent\n");
1892 goto fail;
1893 }
1894 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1895 if (!s->hrecv) {
1896 fprintf(stderr, "Failed CreateEvent\n");
1897 goto fail;
1898 }
1899
1900 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1901 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1902 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1903 PIPE_WAIT,
1904 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1905 if (s->hcom == INVALID_HANDLE_VALUE) {
1906 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1907 s->hcom = NULL;
1908 goto fail;
1909 }
1910
1911 ZeroMemory(&ov, sizeof(ov));
1912 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1913 ret = ConnectNamedPipe(s->hcom, &ov);
1914 if (ret) {
1915 fprintf(stderr, "Failed ConnectNamedPipe\n");
1916 goto fail;
1917 }
1918
1919 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1920 if (!ret) {
1921 fprintf(stderr, "Failed GetOverlappedResult\n");
1922 if (ov.hEvent) {
1923 CloseHandle(ov.hEvent);
1924 ov.hEvent = NULL;
1925 }
1926 goto fail;
1927 }
1928
1929 if (ov.hEvent) {
1930 CloseHandle(ov.hEvent);
1931 ov.hEvent = NULL;
1932 }
1933 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1934 return 0;
1935
1936 fail:
1937 win_chr_close(chr);
1938 return -1;
1939 }
1940
1941
1942 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
1943 {
1944 const char *filename = opts->device;
1945 CharDriverState *chr;
1946 WinCharState *s;
1947
1948 chr = g_malloc0(sizeof(CharDriverState));
1949 s = g_malloc0(sizeof(WinCharState));
1950 chr->opaque = s;
1951 chr->chr_write = win_chr_write;
1952 chr->chr_close = win_chr_close;
1953
1954 if (win_chr_pipe_init(chr, filename) < 0) {
1955 g_free(s);
1956 g_free(chr);
1957 return NULL;
1958 }
1959 qemu_chr_be_generic_open(chr);
1960 return chr;
1961 }
1962
1963 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1964 {
1965 CharDriverState *chr;
1966 WinCharState *s;
1967
1968 chr = g_malloc0(sizeof(CharDriverState));
1969 s = g_malloc0(sizeof(WinCharState));
1970 s->hcom = fd_out;
1971 chr->opaque = s;
1972 chr->chr_write = win_chr_write;
1973 qemu_chr_be_generic_open(chr);
1974 return chr;
1975 }
1976
1977 static CharDriverState *qemu_chr_open_win_con(void)
1978 {
1979 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1980 }
1981
1982 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1983 {
1984 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1985 DWORD dwSize;
1986 int len1;
1987
1988 len1 = len;
1989
1990 while (len1 > 0) {
1991 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1992 break;
1993 }
1994 buf += dwSize;
1995 len1 -= dwSize;
1996 }
1997
1998 return len - len1;
1999 }
2000
2001 static void win_stdio_wait_func(void *opaque)
2002 {
2003 CharDriverState *chr = opaque;
2004 WinStdioCharState *stdio = chr->opaque;
2005 INPUT_RECORD buf[4];
2006 int ret;
2007 DWORD dwSize;
2008 int i;
2009
2010 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
2011 &dwSize);
2012
2013 if (!ret) {
2014 /* Avoid error storm */
2015 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2016 return;
2017 }
2018
2019 for (i = 0; i < dwSize; i++) {
2020 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2021
2022 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2023 int j;
2024 if (kev->uChar.AsciiChar != 0) {
2025 for (j = 0; j < kev->wRepeatCount; j++) {
2026 if (qemu_chr_be_can_write(chr)) {
2027 uint8_t c = kev->uChar.AsciiChar;
2028 qemu_chr_be_write(chr, &c, 1);
2029 }
2030 }
2031 }
2032 }
2033 }
2034 }
2035
2036 static DWORD WINAPI win_stdio_thread(LPVOID param)
2037 {
2038 CharDriverState *chr = param;
2039 WinStdioCharState *stdio = chr->opaque;
2040 int ret;
2041 DWORD dwSize;
2042
2043 while (1) {
2044
2045 /* Wait for one byte */
2046 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2047
2048 /* Exit in case of error, continue if nothing read */
2049 if (!ret) {
2050 break;
2051 }
2052 if (!dwSize) {
2053 continue;
2054 }
2055
2056 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2057 if (stdio->win_stdio_buf == '\r') {
2058 continue;
2059 }
2060
2061 /* Signal the main thread and wait until the byte was eaten */
2062 if (!SetEvent(stdio->hInputReadyEvent)) {
2063 break;
2064 }
2065 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2066 != WAIT_OBJECT_0) {
2067 break;
2068 }
2069 }
2070
2071 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2072 return 0;
2073 }
2074
2075 static void win_stdio_thread_wait_func(void *opaque)
2076 {
2077 CharDriverState *chr = opaque;
2078 WinStdioCharState *stdio = chr->opaque;
2079
2080 if (qemu_chr_be_can_write(chr)) {
2081 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2082 }
2083
2084 SetEvent(stdio->hInputDoneEvent);
2085 }
2086
2087 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2088 {
2089 WinStdioCharState *stdio = chr->opaque;
2090 DWORD dwMode = 0;
2091
2092 GetConsoleMode(stdio->hStdIn, &dwMode);
2093
2094 if (echo) {
2095 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2096 } else {
2097 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2098 }
2099 }
2100
2101 static void win_stdio_close(CharDriverState *chr)
2102 {
2103 WinStdioCharState *stdio = chr->opaque;
2104
2105 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2106 CloseHandle(stdio->hInputReadyEvent);
2107 }
2108 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2109 CloseHandle(stdio->hInputDoneEvent);
2110 }
2111 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2112 TerminateThread(stdio->hInputThread, 0);
2113 }
2114
2115 g_free(chr->opaque);
2116 g_free(chr);
2117 }
2118
2119 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
2120 {
2121 CharDriverState *chr;
2122 WinStdioCharState *stdio;
2123 DWORD dwMode;
2124 int is_console = 0;
2125
2126 chr = g_malloc0(sizeof(CharDriverState));
2127 stdio = g_malloc0(sizeof(WinStdioCharState));
2128
2129 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2130 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2131 fprintf(stderr, "cannot open stdio: invalid handle\n");
2132 exit(1);
2133 }
2134
2135 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2136
2137 chr->opaque = stdio;
2138 chr->chr_write = win_stdio_write;
2139 chr->chr_close = win_stdio_close;
2140
2141 if (is_console) {
2142 if (qemu_add_wait_object(stdio->hStdIn,
2143 win_stdio_wait_func, chr)) {
2144 fprintf(stderr, "qemu_add_wait_object: failed\n");
2145 }
2146 } else {
2147 DWORD dwId;
2148
2149 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2150 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2151 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2152 chr, 0, &dwId);
2153
2154 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2155 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2156 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2157 fprintf(stderr, "cannot create stdio thread or event\n");
2158 exit(1);
2159 }
2160 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2161 win_stdio_thread_wait_func, chr)) {
2162 fprintf(stderr, "qemu_add_wait_object: failed\n");
2163 }
2164 }
2165
2166 dwMode |= ENABLE_LINE_INPUT;
2167
2168 if (is_console) {
2169 /* set the terminal in raw mode */
2170 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2171 dwMode |= ENABLE_PROCESSED_INPUT;
2172 }
2173
2174 SetConsoleMode(stdio->hStdIn, dwMode);
2175
2176 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2177 qemu_chr_fe_set_echo(chr, false);
2178
2179 return chr;
2180 }
2181 #endif /* !_WIN32 */
2182
2183
2184 /***********************************************************/
2185 /* UDP Net console */
2186
2187 typedef struct {
2188 int fd;
2189 GIOChannel *chan;
2190 guint tag;
2191 uint8_t buf[READ_BUF_LEN];
2192 int bufcnt;
2193 int bufptr;
2194 int max_size;
2195 } NetCharDriver;
2196
2197 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2198 {
2199 NetCharDriver *s = chr->opaque;
2200 gsize bytes_written;
2201 GIOStatus status;
2202
2203 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2204 if (status == G_IO_STATUS_EOF) {
2205 return 0;
2206 } else if (status != G_IO_STATUS_NORMAL) {
2207 return -1;
2208 }
2209
2210 return bytes_written;
2211 }
2212
2213 static int udp_chr_read_poll(void *opaque)
2214 {
2215 CharDriverState *chr = opaque;
2216 NetCharDriver *s = chr->opaque;
2217
2218 s->max_size = qemu_chr_be_can_write(chr);
2219
2220 /* If there were any stray characters in the queue process them
2221 * first
2222 */
2223 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2224 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2225 s->bufptr++;
2226 s->max_size = qemu_chr_be_can_write(chr);
2227 }
2228 return s->max_size;
2229 }
2230
2231 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2232 {
2233 CharDriverState *chr = opaque;
2234 NetCharDriver *s = chr->opaque;
2235 gsize bytes_read = 0;
2236 GIOStatus status;
2237
2238 if (s->max_size == 0)
2239 return FALSE;
2240 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2241 &bytes_read, NULL);
2242 s->bufcnt = bytes_read;
2243 s->bufptr = s->bufcnt;
2244 if (status != G_IO_STATUS_NORMAL) {
2245 return FALSE;
2246 }
2247
2248 s->bufptr = 0;
2249 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2250 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2251 s->bufptr++;
2252 s->max_size = qemu_chr_be_can_write(chr);
2253 }
2254
2255 return TRUE;
2256 }
2257
2258 static void udp_chr_update_read_handler(CharDriverState *chr)
2259 {
2260 NetCharDriver *s = chr->opaque;
2261
2262 if (s->tag) {
2263 g_source_remove(s->tag);
2264 s->tag = 0;
2265 }
2266
2267 if (s->chan) {
2268 s->tag = io_add_watch_poll(s->chan, udp_chr_read_poll, udp_chr_read, chr);
2269 }
2270 }
2271
2272 static void udp_chr_close(CharDriverState *chr)
2273 {
2274 NetCharDriver *s = chr->opaque;
2275 if (s->tag) {
2276 g_source_remove(s->tag);
2277 }
2278 if (s->chan) {
2279 g_io_channel_unref(s->chan);
2280 closesocket(s->fd);
2281 }
2282 g_free(s);
2283 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2284 }
2285
2286 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2287 {
2288 CharDriverState *chr = NULL;
2289 NetCharDriver *s = NULL;
2290
2291 chr = g_malloc0(sizeof(CharDriverState));
2292 s = g_malloc0(sizeof(NetCharDriver));
2293
2294 s->fd = fd;
2295 s->chan = io_channel_from_socket(s->fd);
2296 s->bufcnt = 0;
2297 s->bufptr = 0;
2298 chr->opaque = s;
2299 chr->chr_write = udp_chr_write;
2300 chr->chr_update_read_handler = udp_chr_update_read_handler;
2301 chr->chr_close = udp_chr_close;
2302 return chr;
2303 }
2304
2305 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2306 {
2307 Error *local_err = NULL;
2308 int fd = -1;
2309
2310 fd = inet_dgram_opts(opts, &local_err);
2311 if (fd < 0) {
2312 return NULL;
2313 }
2314 return qemu_chr_open_udp_fd(fd);
2315 }
2316
2317 /***********************************************************/
2318 /* TCP Net console */
2319
2320 typedef struct {
2321
2322 GIOChannel *chan, *listen_chan;
2323 guint tag, listen_tag;
2324 int fd, listen_fd;
2325 int connected;
2326 int max_size;
2327 int do_telnetopt;
2328 int do_nodelay;
2329 int is_unix;
2330 int msgfd;
2331 } TCPCharDriver;
2332
2333 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2334
2335 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2336 {
2337 TCPCharDriver *s = chr->opaque;
2338 if (s->connected) {
2339 return io_channel_send(s->chan, buf, len);
2340 } else {
2341 /* XXX: indicate an error ? */
2342 return len;
2343 }
2344 }
2345
2346 static int tcp_chr_read_poll(void *opaque)
2347 {
2348 CharDriverState *chr = opaque;
2349 TCPCharDriver *s = chr->opaque;
2350 if (!s->connected)
2351 return 0;
2352 s->max_size = qemu_chr_be_can_write(chr);
2353 return s->max_size;
2354 }
2355
2356 #define IAC 255
2357 #define IAC_BREAK 243
2358 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2359 TCPCharDriver *s,
2360 uint8_t *buf, int *size)
2361 {
2362 /* Handle any telnet client's basic IAC options to satisfy char by
2363 * char mode with no echo. All IAC options will be removed from
2364 * the buf and the do_telnetopt variable will be used to track the
2365 * state of the width of the IAC information.
2366 *
2367 * IAC commands come in sets of 3 bytes with the exception of the
2368 * "IAC BREAK" command and the double IAC.
2369 */
2370
2371 int i;
2372 int j = 0;
2373
2374 for (i = 0; i < *size; i++) {
2375 if (s->do_telnetopt > 1) {
2376 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2377 /* Double IAC means send an IAC */
2378 if (j != i)
2379 buf[j] = buf[i];
2380 j++;
2381 s->do_telnetopt = 1;
2382 } else {
2383 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2384 /* Handle IAC break commands by sending a serial break */
2385 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2386 s->do_telnetopt++;
2387 }
2388 s->do_telnetopt++;
2389 }
2390 if (s->do_telnetopt >= 4) {
2391 s->do_telnetopt = 1;
2392 }
2393 } else {
2394 if ((unsigned char)buf[i] == IAC) {
2395 s->do_telnetopt = 2;
2396 } else {
2397 if (j != i)
2398 buf[j] = buf[i];
2399 j++;
2400 }
2401 }
2402 }
2403 *size = j;
2404 }
2405
2406 static int tcp_get_msgfd(CharDriverState *chr)
2407 {
2408 TCPCharDriver *s = chr->opaque;
2409 int fd = s->msgfd;
2410 s->msgfd = -1;
2411 return fd;
2412 }
2413
2414 #ifndef _WIN32
2415 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2416 {
2417 TCPCharDriver *s = chr->opaque;
2418 struct cmsghdr *cmsg;
2419
2420 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2421 int fd;
2422
2423 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2424 cmsg->cmsg_level != SOL_SOCKET ||
2425 cmsg->cmsg_type != SCM_RIGHTS)
2426 continue;
2427
2428 fd = *((int *)CMSG_DATA(cmsg));
2429 if (fd < 0)
2430 continue;
2431
2432 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2433 qemu_set_block(fd);
2434
2435 #ifndef MSG_CMSG_CLOEXEC
2436 qemu_set_cloexec(fd);
2437 #endif
2438 if (s->msgfd != -1)
2439 close(s->msgfd);
2440 s->msgfd = fd;
2441 }
2442 }
2443
2444 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2445 {
2446 TCPCharDriver *s = chr->opaque;
2447 struct msghdr msg = { NULL, };
2448 struct iovec iov[1];
2449 union {
2450 struct cmsghdr cmsg;
2451 char control[CMSG_SPACE(sizeof(int))];
2452 } msg_control;
2453 int flags = 0;
2454 ssize_t ret;
2455
2456 iov[0].iov_base = buf;
2457 iov[0].iov_len = len;
2458
2459 msg.msg_iov = iov;
2460 msg.msg_iovlen = 1;
2461 msg.msg_control = &msg_control;
2462 msg.msg_controllen = sizeof(msg_control);
2463
2464 #ifdef MSG_CMSG_CLOEXEC
2465 flags |= MSG_CMSG_CLOEXEC;
2466 #endif
2467 ret = recvmsg(s->fd, &msg, flags);
2468 if (ret > 0 && s->is_unix) {
2469 unix_process_msgfd(chr, &msg);
2470 }
2471
2472 return ret;
2473 }
2474 #else
2475 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2476 {
2477 TCPCharDriver *s = chr->opaque;
2478 return qemu_recv(s->fd, buf, len, 0);
2479 }
2480 #endif
2481
2482 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2483 {
2484 TCPCharDriver *s = chr->opaque;
2485 return g_io_create_watch(s->chan, cond);
2486 }
2487
2488 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2489 {
2490 CharDriverState *chr = opaque;
2491 TCPCharDriver *s = chr->opaque;
2492 uint8_t buf[READ_BUF_LEN];
2493 int len, size;
2494
2495 if (!s->connected || s->max_size <= 0) {
2496 return FALSE;
2497 }
2498 len = sizeof(buf);
2499 if (len > s->max_size)
2500 len = s->max_size;
2501 size = tcp_chr_recv(chr, (void *)buf, len);
2502 if (size == 0) {
2503 /* connection closed */
2504 s->connected = 0;
2505 if (s->listen_chan) {
2506 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2507 }
2508 g_source_remove(s->tag);
2509 s->tag = 0;
2510 g_io_channel_unref(s->chan);
2511 s->chan = NULL;
2512 closesocket(s->fd);
2513 s->fd = -1;
2514 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2515 } else if (size > 0) {
2516 if (s->do_telnetopt)
2517 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2518 if (size > 0)
2519 qemu_chr_be_write(chr, buf, size);
2520 }
2521
2522 return TRUE;
2523 }
2524
2525 #ifndef _WIN32
2526 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2527 {
2528 return qemu_chr_open_fd(eventfd, eventfd);
2529 }
2530 #endif
2531
2532 static void tcp_chr_connect(void *opaque)
2533 {
2534 CharDriverState *chr = opaque;
2535 TCPCharDriver *s = chr->opaque;
2536
2537 s->connected = 1;
2538 if (s->chan) {
2539 s->tag = io_add_watch_poll(s->chan, tcp_chr_read_poll, tcp_chr_read, chr);
2540 }
2541 qemu_chr_be_generic_open(chr);
2542 }
2543
2544 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2545 static void tcp_chr_telnet_init(int fd)
2546 {
2547 char buf[3];
2548 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2549 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2550 send(fd, (char *)buf, 3, 0);
2551 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2552 send(fd, (char *)buf, 3, 0);
2553 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2554 send(fd, (char *)buf, 3, 0);
2555 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2556 send(fd, (char *)buf, 3, 0);
2557 }
2558
2559 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2560 {
2561 TCPCharDriver *s = chr->opaque;
2562 if (s->fd != -1)
2563 return -1;
2564
2565 qemu_set_nonblock(fd);
2566 if (s->do_nodelay)
2567 socket_set_nodelay(fd);
2568 s->fd = fd;
2569 s->chan = io_channel_from_socket(fd);
2570 g_source_remove(s->listen_tag);
2571 s->listen_tag = 0;
2572 tcp_chr_connect(chr);
2573
2574 return 0;
2575 }
2576
2577 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
2578 {
2579 CharDriverState *chr = opaque;
2580 TCPCharDriver *s = chr->opaque;
2581 struct sockaddr_in saddr;
2582 #ifndef _WIN32
2583 struct sockaddr_un uaddr;
2584 #endif
2585 struct sockaddr *addr;
2586 socklen_t len;
2587 int fd;
2588
2589 for(;;) {
2590 #ifndef _WIN32
2591 if (s->is_unix) {
2592 len = sizeof(uaddr);
2593 addr = (struct sockaddr *)&uaddr;
2594 } else
2595 #endif
2596 {
2597 len = sizeof(saddr);
2598 addr = (struct sockaddr *)&saddr;
2599 }
2600 fd = qemu_accept(s->listen_fd, addr, &len);
2601 if (fd < 0 && errno != EINTR) {
2602 return FALSE;
2603 } else if (fd >= 0) {
2604 if (s->do_telnetopt)
2605 tcp_chr_telnet_init(fd);
2606 break;
2607 }
2608 }
2609 if (tcp_chr_add_client(chr, fd) < 0)
2610 close(fd);
2611
2612 return TRUE;
2613 }
2614
2615 static void tcp_chr_close(CharDriverState *chr)
2616 {
2617 TCPCharDriver *s = chr->opaque;
2618 if (s->fd >= 0) {
2619 if (s->tag) {
2620 g_source_remove(s->tag);
2621 }
2622 if (s->chan) {
2623 g_io_channel_unref(s->chan);
2624 }
2625 closesocket(s->fd);
2626 }
2627 if (s->listen_fd >= 0) {
2628 if (s->listen_tag) {
2629 g_source_remove(s->listen_tag);
2630 }
2631 if (s->listen_chan) {
2632 g_io_channel_unref(s->listen_chan);
2633 }
2634 closesocket(s->listen_fd);
2635 }
2636 g_free(s);
2637 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2638 }
2639
2640 static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
2641 bool is_listen, bool is_telnet,
2642 bool is_waitconnect,
2643 Error **errp)
2644 {
2645 CharDriverState *chr = NULL;
2646 TCPCharDriver *s = NULL;
2647 char host[NI_MAXHOST], serv[NI_MAXSERV];
2648 const char *left = "", *right = "";
2649 struct sockaddr_storage ss;
2650 socklen_t ss_len = sizeof(ss);
2651
2652 memset(&ss, 0, ss_len);
2653 if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2654 error_setg(errp, "getsockname: %s", strerror(errno));
2655 return NULL;
2656 }
2657
2658 chr = g_malloc0(sizeof(CharDriverState));
2659 s = g_malloc0(sizeof(TCPCharDriver));
2660
2661 s->connected = 0;
2662 s->fd = -1;
2663 s->listen_fd = -1;
2664 s->msgfd = -1;
2665
2666 chr->filename = g_malloc(256);
2667 switch (ss.ss_family) {
2668 #ifndef _WIN32
2669 case AF_UNIX:
2670 s->is_unix = 1;
2671 snprintf(chr->filename, 256, "unix:%s%s",
2672 ((struct sockaddr_un *)(&ss))->sun_path,
2673 is_listen ? ",server" : "");
2674 break;
2675 #endif
2676 case AF_INET6:
2677 left = "[";
2678 right = "]";
2679 /* fall through */
2680 case AF_INET:
2681 s->do_nodelay = do_nodelay;
2682 getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
2683 serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
2684 snprintf(chr->filename, 256, "%s:%s%s%s:%s%s",
2685 is_telnet ? "telnet" : "tcp",
2686 left, host, right, serv,
2687 is_listen ? ",server" : "");
2688 break;
2689 }
2690
2691 chr->opaque = s;
2692 chr->chr_write = tcp_chr_write;
2693 chr->chr_close = tcp_chr_close;
2694 chr->get_msgfd = tcp_get_msgfd;
2695 chr->chr_add_client = tcp_chr_add_client;
2696 chr->chr_add_watch = tcp_chr_add_watch;
2697
2698 if (is_listen) {
2699 s->listen_fd = fd;
2700 s->listen_chan = io_channel_from_socket(s->listen_fd);
2701 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2702 if (is_telnet) {
2703 s->do_telnetopt = 1;
2704 }
2705 } else {
2706 s->connected = 1;
2707 s->fd = fd;
2708 socket_set_nodelay(fd);
2709 s->chan = io_channel_from_socket(s->fd);
2710 tcp_chr_connect(chr);
2711 }
2712
2713 if (is_listen && is_waitconnect) {
2714 printf("QEMU waiting for connection on: %s\n",
2715 chr->filename);
2716 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
2717 qemu_set_nonblock(s->listen_fd);
2718 }
2719 return chr;
2720 }
2721
2722 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2723 {
2724 CharDriverState *chr = NULL;
2725 Error *local_err = NULL;
2726 int fd = -1;
2727 int is_listen;
2728 int is_waitconnect;
2729 int do_nodelay;
2730 int is_unix;
2731 int is_telnet;
2732
2733 is_listen = qemu_opt_get_bool(opts, "server", 0);
2734 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2735 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2736 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2737 is_unix = qemu_opt_get(opts, "path") != NULL;
2738 if (!is_listen)
2739 is_waitconnect = 0;
2740
2741 if (is_unix) {
2742 if (is_listen) {
2743 fd = unix_listen_opts(opts, &local_err);
2744 } else {
2745 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
2746 }
2747 } else {
2748 if (is_listen) {
2749 fd = inet_listen_opts(opts, 0, &local_err);
2750 } else {
2751 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
2752 }
2753 }
2754 if (fd < 0) {
2755 goto fail;
2756 }
2757
2758 if (!is_waitconnect)
2759 qemu_set_nonblock(fd);
2760
2761 chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet,
2762 is_waitconnect, &local_err);
2763 if (error_is_set(&local_err)) {
2764 goto fail;
2765 }
2766 return chr;
2767
2768
2769 fail:
2770 if (local_err) {
2771 qerror_report_err(local_err);
2772 error_free(local_err);
2773 }
2774 if (fd >= 0) {
2775 closesocket(fd);
2776 }
2777 if (chr) {
2778 g_free(chr->opaque);
2779 g_free(chr);
2780 }
2781 return NULL;
2782 }
2783
2784 /*********************************************************/
2785 /* Ring buffer chardev */
2786
2787 typedef struct {
2788 size_t size;
2789 size_t prod;
2790 size_t cons;
2791 uint8_t *cbuf;
2792 } RingBufCharDriver;
2793
2794 static size_t ringbuf_count(const CharDriverState *chr)
2795 {
2796 const RingBufCharDriver *d = chr->opaque;
2797
2798 return d->prod - d->cons;
2799 }
2800
2801 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2802 {
2803 RingBufCharDriver *d = chr->opaque;
2804 int i;
2805
2806 if (!buf || (len < 0)) {
2807 return -1;
2808 }
2809
2810 for (i = 0; i < len; i++ ) {
2811 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
2812 if (d->prod - d->cons > d->size) {
2813 d->cons = d->prod - d->size;
2814 }
2815 }
2816
2817 return 0;
2818 }
2819
2820 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
2821 {
2822 RingBufCharDriver *d = chr->opaque;
2823 int i;
2824
2825 for (i = 0; i < len && d->cons != d->prod; i++) {
2826 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
2827 }
2828
2829 return i;
2830 }
2831
2832 static void ringbuf_chr_close(struct CharDriverState *chr)
2833 {
2834 RingBufCharDriver *d = chr->opaque;
2835
2836 g_free(d->cbuf);
2837 g_free(d);
2838 chr->opaque = NULL;
2839 }
2840
2841 static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts,
2842 Error **errp)
2843 {
2844 CharDriverState *chr;
2845 RingBufCharDriver *d;
2846
2847 chr = g_malloc0(sizeof(CharDriverState));
2848 d = g_malloc(sizeof(*d));
2849
2850 d->size = opts->has_size ? opts->size : 65536;
2851
2852 /* The size must be power of 2 */
2853 if (d->size & (d->size - 1)) {
2854 error_setg(errp, "size of ringbuf chardev must be power of two");
2855 goto fail;
2856 }
2857
2858 d->prod = 0;
2859 d->cons = 0;
2860 d->cbuf = g_malloc0(d->size);
2861
2862 chr->opaque = d;
2863 chr->chr_write = ringbuf_chr_write;
2864 chr->chr_close = ringbuf_chr_close;
2865
2866 return chr;
2867
2868 fail:
2869 g_free(d);
2870 g_free(chr);
2871 return NULL;
2872 }
2873
2874 static bool chr_is_ringbuf(const CharDriverState *chr)
2875 {
2876 return chr->chr_write == ringbuf_chr_write;
2877 }
2878
2879 void qmp_ringbuf_write(const char *device, const char *data,
2880 bool has_format, enum DataFormat format,
2881 Error **errp)
2882 {
2883 CharDriverState *chr;
2884 const uint8_t *write_data;
2885 int ret;
2886 size_t write_count;
2887
2888 chr = qemu_chr_find(device);
2889 if (!chr) {
2890 error_setg(errp, "Device '%s' not found", device);
2891 return;
2892 }
2893
2894 if (!chr_is_ringbuf(chr)) {
2895 error_setg(errp,"%s is not a ringbuf device", device);
2896 return;
2897 }
2898
2899 if (has_format && (format == DATA_FORMAT_BASE64)) {
2900 write_data = g_base64_decode(data, &write_count);
2901 } else {
2902 write_data = (uint8_t *)data;
2903 write_count = strlen(data);
2904 }
2905
2906 ret = ringbuf_chr_write(chr, write_data, write_count);
2907
2908 if (write_data != (uint8_t *)data) {
2909 g_free((void *)write_data);
2910 }
2911
2912 if (ret < 0) {
2913 error_setg(errp, "Failed to write to device %s", device);
2914 return;
2915 }
2916 }
2917
2918 char *qmp_ringbuf_read(const char *device, int64_t size,
2919 bool has_format, enum DataFormat format,
2920 Error **errp)
2921 {
2922 CharDriverState *chr;
2923 uint8_t *read_data;
2924 size_t count;
2925 char *data;
2926
2927 chr = qemu_chr_find(device);
2928 if (!chr) {
2929 error_setg(errp, "Device '%s' not found", device);
2930 return NULL;
2931 }
2932
2933 if (!chr_is_ringbuf(chr)) {
2934 error_setg(errp,"%s is not a ringbuf device", device);
2935 return NULL;
2936 }
2937
2938 if (size <= 0) {
2939 error_setg(errp, "size must be greater than zero");
2940 return NULL;
2941 }
2942
2943 count = ringbuf_count(chr);
2944 size = size > count ? count : size;
2945 read_data = g_malloc(size + 1);
2946
2947 ringbuf_chr_read(chr, read_data, size);
2948
2949 if (has_format && (format == DATA_FORMAT_BASE64)) {
2950 data = g_base64_encode(read_data, size);
2951 g_free(read_data);
2952 } else {
2953 /*
2954 * FIXME should read only complete, valid UTF-8 characters up
2955 * to @size bytes. Invalid sequences should be replaced by a
2956 * suitable replacement character. Except when (and only
2957 * when) ring buffer lost characters since last read, initial
2958 * continuation characters should be dropped.
2959 */
2960 read_data[size] = 0;
2961 data = (char *)read_data;
2962 }
2963
2964 return data;
2965 }
2966
2967 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2968 {
2969 char host[65], port[33], width[8], height[8];
2970 int pos;
2971 const char *p;
2972 QemuOpts *opts;
2973 Error *local_err = NULL;
2974
2975 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
2976 if (error_is_set(&local_err)) {
2977 qerror_report_err(local_err);
2978 error_free(local_err);
2979 return NULL;
2980 }
2981
2982 if (strstart(filename, "mon:", &p)) {
2983 filename = p;
2984 qemu_opt_set(opts, "mux", "on");
2985 }
2986
2987 if (strcmp(filename, "null") == 0 ||
2988 strcmp(filename, "pty") == 0 ||
2989 strcmp(filename, "msmouse") == 0 ||
2990 strcmp(filename, "braille") == 0 ||
2991 strcmp(filename, "stdio") == 0) {
2992 qemu_opt_set(opts, "backend", filename);
2993 return opts;
2994 }
2995 if (strstart(filename, "vc", &p)) {
2996 qemu_opt_set(opts, "backend", "vc");
2997 if (*p == ':') {
2998 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2999 /* pixels */
3000 qemu_opt_set(opts, "width", width);
3001 qemu_opt_set(opts, "height", height);
3002 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
3003 /* chars */
3004 qemu_opt_set(opts, "cols", width);
3005 qemu_opt_set(opts, "rows", height);
3006 } else {
3007 goto fail;
3008 }
3009 }
3010 return opts;
3011 }
3012 if (strcmp(filename, "con:") == 0) {
3013 qemu_opt_set(opts, "backend", "console");
3014 return opts;
3015 }
3016 if (strstart(filename, "COM", NULL)) {
3017 qemu_opt_set(opts, "backend", "serial");
3018 qemu_opt_set(opts, "path", filename);
3019 return opts;
3020 }
3021 if (strstart(filename, "file:", &p)) {
3022 qemu_opt_set(opts, "backend", "file");
3023 qemu_opt_set(opts, "path", p);
3024 return opts;
3025 }
3026 if (strstart(filename, "pipe:", &p)) {
3027 qemu_opt_set(opts, "backend", "pipe");
3028 qemu_opt_set(opts, "path", p);
3029 return opts;
3030 }
3031 if (strstart(filename, "tcp:", &p) ||
3032 strstart(filename, "telnet:", &p)) {
3033 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3034 host[0] = 0;
3035 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3036 goto fail;
3037 }
3038 qemu_opt_set(opts, "backend", "socket");
3039 qemu_opt_set(opts, "host", host);
3040 qemu_opt_set(opts, "port", port);
3041 if (p[pos] == ',') {
3042 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
3043 goto fail;
3044 }
3045 if (strstart(filename, "telnet:", &p))
3046 qemu_opt_set(opts, "telnet", "on");
3047 return opts;
3048 }
3049 if (strstart(filename, "udp:", &p)) {
3050 qemu_opt_set(opts, "backend", "udp");
3051 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3052 host[0] = 0;
3053 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3054 goto fail;
3055 }
3056 }
3057 qemu_opt_set(opts, "host", host);
3058 qemu_opt_set(opts, "port", port);
3059 if (p[pos] == '@') {
3060 p += pos + 1;
3061 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3062 host[0] = 0;
3063 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3064 goto fail;
3065 }
3066 }
3067 qemu_opt_set(opts, "localaddr", host);
3068 qemu_opt_set(opts, "localport", port);
3069 }
3070 return opts;
3071 }
3072 if (strstart(filename, "unix:", &p)) {
3073 qemu_opt_set(opts, "backend", "socket");
3074 if (qemu_opts_do_parse(opts, p, "path") != 0)
3075 goto fail;
3076 return opts;
3077 }
3078 if (strstart(filename, "/dev/parport", NULL) ||
3079 strstart(filename, "/dev/ppi", NULL)) {
3080 qemu_opt_set(opts, "backend", "parport");
3081 qemu_opt_set(opts, "path", filename);
3082 return opts;
3083 }
3084 if (strstart(filename, "/dev/", NULL)) {
3085 qemu_opt_set(opts, "backend", "tty");
3086 qemu_opt_set(opts, "path", filename);
3087 return opts;
3088 }
3089
3090 fail:
3091 qemu_opts_del(opts);
3092 return NULL;
3093 }
3094
3095 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3096 Error **errp)
3097 {
3098 const char *path = qemu_opt_get(opts, "path");
3099
3100 if (path == NULL) {
3101 error_setg(errp, "chardev: file: no filename given");
3102 return;
3103 }
3104 backend->file = g_new0(ChardevFile, 1);
3105 backend->file->out = g_strdup(path);
3106 }
3107
3108 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3109 Error **errp)
3110 {
3111 backend->stdio = g_new0(ChardevStdio, 1);
3112 backend->stdio->has_signal = true;
3113 backend->stdio->signal =
3114 qemu_opt_get_bool(opts, "signal", display_type != DT_NOGRAPHIC);
3115 }
3116
3117 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3118 Error **errp)
3119 {
3120 const char *device = qemu_opt_get(opts, "path");
3121
3122 if (device == NULL) {
3123 error_setg(errp, "chardev: serial/tty: no device path given");
3124 return;
3125 }
3126 backend->serial = g_new0(ChardevHostdev, 1);
3127 backend->serial->device = g_strdup(device);
3128 }
3129
3130 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3131 Error **errp)
3132 {
3133 const char *device = qemu_opt_get(opts, "path");
3134
3135 if (device == NULL) {
3136 error_setg(errp, "chardev: parallel: no device path given");
3137 return;
3138 }
3139 backend->parallel = g_new0(ChardevHostdev, 1);
3140 backend->parallel->device = g_strdup(device);
3141 }
3142
3143 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3144 Error **errp)
3145 {
3146 const char *device = qemu_opt_get(opts, "path");
3147
3148 if (device == NULL) {
3149 error_setg(errp, "chardev: pipe: no device path given");
3150 return;
3151 }
3152 backend->pipe = g_new0(ChardevHostdev, 1);
3153 backend->pipe->device = g_strdup(device);
3154 }
3155
3156 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3157 Error **errp)
3158 {
3159 int val;
3160
3161 backend->memory = g_new0(ChardevRingbuf, 1);
3162
3163 val = qemu_opt_get_number(opts, "size", 0);
3164 if (val != 0) {
3165 backend->memory->has_size = true;
3166 backend->memory->size = val;
3167 }
3168 }
3169
3170 typedef struct CharDriver {
3171 const char *name;
3172 /* old, pre qapi */
3173 CharDriverState *(*open)(QemuOpts *opts);
3174 /* new, qapi-based */
3175 int kind;
3176 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3177 } CharDriver;
3178
3179 static GSList *backends;
3180
3181 void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *))
3182 {
3183 CharDriver *s;
3184
3185 s = g_malloc0(sizeof(*s));
3186 s->name = g_strdup(name);
3187 s->open = open;
3188
3189 backends = g_slist_append(backends, s);
3190 }
3191
3192 void register_char_driver_qapi(const char *name, int kind,
3193 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp))
3194 {
3195 CharDriver *s;
3196
3197 s = g_malloc0(sizeof(*s));
3198 s->name = g_strdup(name);
3199 s->kind = kind;
3200 s->parse = parse;
3201
3202 backends = g_slist_append(backends, s);
3203 }
3204
3205 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3206 void (*init)(struct CharDriverState *s),
3207 Error **errp)
3208 {
3209 CharDriver *cd;
3210 CharDriverState *chr;
3211 GSList *i;
3212
3213 if (qemu_opts_id(opts) == NULL) {
3214 error_setg(errp, "chardev: no id specified");
3215 goto err;
3216 }
3217
3218 if (qemu_opt_get(opts, "backend") == NULL) {
3219 error_setg(errp, "chardev: \"%s\" missing backend",
3220 qemu_opts_id(opts));
3221 goto err;
3222 }
3223 for (i = backends; i; i = i->next) {
3224 cd = i->data;
3225
3226 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3227 break;
3228 }
3229 }
3230 if (i == NULL) {
3231 error_setg(errp, "chardev: backend \"%s\" not found",
3232 qemu_opt_get(opts, "backend"));
3233 return NULL;
3234 }
3235
3236 if (!cd->open) {
3237 /* using new, qapi init */
3238 ChardevBackend *backend = g_new0(ChardevBackend, 1);
3239 ChardevReturn *ret = NULL;
3240 const char *id = qemu_opts_id(opts);
3241 const char *bid = NULL;
3242
3243 if (qemu_opt_get_bool(opts, "mux", 0)) {
3244 bid = g_strdup_printf("%s-base", id);
3245 }
3246
3247 chr = NULL;
3248 backend->kind = cd->kind;
3249 if (cd->parse) {
3250 cd->parse(opts, backend, errp);
3251 if (error_is_set(errp)) {
3252 goto qapi_out;
3253 }
3254 }
3255 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3256 if (error_is_set(errp)) {
3257 goto qapi_out;
3258 }
3259
3260 if (bid) {
3261 qapi_free_ChardevBackend(backend);
3262 qapi_free_ChardevReturn(ret);
3263 backend = g_new0(ChardevBackend, 1);
3264 backend->mux = g_new0(ChardevMux, 1);
3265 backend->kind = CHARDEV_BACKEND_KIND_MUX;
3266 backend->mux->chardev = g_strdup(bid);
3267 ret = qmp_chardev_add(id, backend, errp);
3268 if (error_is_set(errp)) {
3269 goto qapi_out;
3270 }
3271 }
3272
3273 chr = qemu_chr_find(id);
3274
3275 qapi_out:
3276 qapi_free_ChardevBackend(backend);
3277 qapi_free_ChardevReturn(ret);
3278 return chr;
3279 }
3280
3281 chr = cd->open(opts);
3282 if (!chr) {
3283 error_setg(errp, "chardev: opening backend \"%s\" failed",
3284 qemu_opt_get(opts, "backend"));
3285 goto err;
3286 }
3287
3288 if (!chr->filename)
3289 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
3290 chr->init = init;
3291 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3292
3293 if (qemu_opt_get_bool(opts, "mux", 0)) {
3294 CharDriverState *base = chr;
3295 int len = strlen(qemu_opts_id(opts)) + 6;
3296 base->label = g_malloc(len);
3297 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
3298 chr = qemu_chr_open_mux(base);
3299 chr->filename = base->filename;
3300 chr->avail_connections = MAX_MUX;
3301 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3302 } else {
3303 chr->avail_connections = 1;
3304 }
3305 chr->label = g_strdup(qemu_opts_id(opts));
3306 chr->opts = opts;
3307 return chr;
3308
3309 err:
3310 qemu_opts_del(opts);
3311 return NULL;
3312 }
3313
3314 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3315 {
3316 const char *p;
3317 CharDriverState *chr;
3318 QemuOpts *opts;
3319 Error *err = NULL;
3320
3321 if (strstart(filename, "chardev:", &p)) {
3322 return qemu_chr_find(p);
3323 }
3324
3325 opts = qemu_chr_parse_compat(label, filename);
3326 if (!opts)
3327 return NULL;
3328
3329 chr = qemu_chr_new_from_opts(opts, init, &err);
3330 if (error_is_set(&err)) {
3331 fprintf(stderr, "%s\n", error_get_pretty(err));
3332 error_free(err);
3333 }
3334 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3335 qemu_chr_fe_claim_no_fail(chr);
3336 monitor_init(chr, MONITOR_USE_READLINE);
3337 }
3338 return chr;
3339 }
3340
3341 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3342 {
3343 if (chr->chr_set_echo) {
3344 chr->chr_set_echo(chr, echo);
3345 }
3346 }
3347
3348 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
3349 {
3350 if (chr->fe_open == fe_open) {
3351 return;
3352 }
3353 chr->fe_open = fe_open;
3354 if (chr->chr_set_fe_open) {
3355 chr->chr_set_fe_open(chr, fe_open);
3356 }
3357 }
3358
3359 int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3360 GIOFunc func, void *user_data)
3361 {
3362 GSource *src;
3363 guint tag;
3364
3365 if (s->chr_add_watch == NULL) {
3366 return -ENOSYS;
3367 }
3368
3369 src = s->chr_add_watch(s, cond);
3370 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3371 tag = g_source_attach(src, NULL);
3372 g_source_unref(src);
3373
3374 return tag;
3375 }
3376
3377 int qemu_chr_fe_claim(CharDriverState *s)
3378 {
3379 if (s->avail_connections < 1) {
3380 return -1;
3381 }
3382 s->avail_connections--;
3383 return 0;
3384 }
3385
3386 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
3387 {
3388 if (qemu_chr_fe_claim(s) != 0) {
3389 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
3390 __func__, s->label);
3391 exit(1);
3392 }
3393 }
3394
3395 void qemu_chr_fe_release(CharDriverState *s)
3396 {
3397 s->avail_connections++;
3398 }
3399
3400 void qemu_chr_delete(CharDriverState *chr)
3401 {
3402 QTAILQ_REMOVE(&chardevs, chr, next);
3403 if (chr->chr_close) {
3404 chr->chr_close(chr);
3405 }
3406 g_free(chr->filename);
3407 g_free(chr->label);
3408 if (chr->opts) {
3409 qemu_opts_del(chr->opts);
3410 }
3411 g_free(chr);
3412 }
3413
3414 ChardevInfoList *qmp_query_chardev(Error **errp)
3415 {
3416 ChardevInfoList *chr_list = NULL;
3417 CharDriverState *chr;
3418
3419 QTAILQ_FOREACH(chr, &chardevs, next) {
3420 ChardevInfoList *info = g_malloc0(sizeof(*info));
3421 info->value = g_malloc0(sizeof(*info->value));
3422 info->value->label = g_strdup(chr->label);
3423 info->value->filename = g_strdup(chr->filename);
3424
3425 info->next = chr_list;
3426 chr_list = info;
3427 }
3428
3429 return chr_list;
3430 }
3431
3432 CharDriverState *qemu_chr_find(const char *name)
3433 {
3434 CharDriverState *chr;
3435
3436 QTAILQ_FOREACH(chr, &chardevs, next) {
3437 if (strcmp(chr->label, name) != 0)
3438 continue;
3439 return chr;
3440 }
3441 return NULL;
3442 }
3443
3444 /* Get a character (serial) device interface. */
3445 CharDriverState *qemu_char_get_next_serial(void)
3446 {
3447 static int next_serial;
3448 CharDriverState *chr;
3449
3450 /* FIXME: This function needs to go away: use chardev properties! */
3451
3452 while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
3453 chr = serial_hds[next_serial++];
3454 qemu_chr_fe_claim_no_fail(chr);
3455 return chr;
3456 }
3457 return NULL;
3458 }
3459
3460 QemuOptsList qemu_chardev_opts = {
3461 .name = "chardev",
3462 .implied_opt_name = "backend",
3463 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3464 .desc = {
3465 {
3466 .name = "backend",
3467 .type = QEMU_OPT_STRING,
3468 },{
3469 .name = "path",
3470 .type = QEMU_OPT_STRING,
3471 },{
3472 .name = "host",
3473 .type = QEMU_OPT_STRING,
3474 },{
3475 .name = "port",
3476 .type = QEMU_OPT_STRING,
3477 },{
3478 .name = "localaddr",
3479 .type = QEMU_OPT_STRING,
3480 },{
3481 .name = "localport",
3482 .type = QEMU_OPT_STRING,
3483 },{
3484 .name = "to",
3485 .type = QEMU_OPT_NUMBER,
3486 },{
3487 .name = "ipv4",
3488 .type = QEMU_OPT_BOOL,
3489 },{
3490 .name = "ipv6",
3491 .type = QEMU_OPT_BOOL,
3492 },{
3493 .name = "wait",
3494 .type = QEMU_OPT_BOOL,
3495 },{
3496 .name = "server",
3497 .type = QEMU_OPT_BOOL,
3498 },{
3499 .name = "delay",
3500 .type = QEMU_OPT_BOOL,
3501 },{
3502 .name = "telnet",
3503 .type = QEMU_OPT_BOOL,
3504 },{
3505 .name = "width",
3506 .type = QEMU_OPT_NUMBER,
3507 },{
3508 .name = "height",
3509 .type = QEMU_OPT_NUMBER,
3510 },{
3511 .name = "cols",
3512 .type = QEMU_OPT_NUMBER,
3513 },{
3514 .name = "rows",
3515 .type = QEMU_OPT_NUMBER,
3516 },{
3517 .name = "mux",
3518 .type = QEMU_OPT_BOOL,
3519 },{
3520 .name = "signal",
3521 .type = QEMU_OPT_BOOL,
3522 },{
3523 .name = "name",
3524 .type = QEMU_OPT_STRING,
3525 },{
3526 .name = "debug",
3527 .type = QEMU_OPT_NUMBER,
3528 },{
3529 .name = "size",
3530 .type = QEMU_OPT_SIZE,
3531 },
3532 { /* end of list */ }
3533 },
3534 };
3535
3536 #ifdef _WIN32
3537
3538 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3539 {
3540 HANDLE out;
3541
3542 if (file->in) {
3543 error_setg(errp, "input file not supported");
3544 return NULL;
3545 }
3546
3547 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
3548 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
3549 if (out == INVALID_HANDLE_VALUE) {
3550 error_setg(errp, "open %s failed", file->out);
3551 return NULL;
3552 }
3553 return qemu_chr_open_win_file(out);
3554 }
3555
3556 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3557 Error **errp)
3558 {
3559 return qemu_chr_open_win_path(serial->device);
3560 }
3561
3562 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3563 Error **errp)
3564 {
3565 error_setg(errp, "character device backend type 'parallel' not supported");
3566 return NULL;
3567 }
3568
3569 #else /* WIN32 */
3570
3571 static int qmp_chardev_open_file_source(char *src, int flags,
3572 Error **errp)
3573 {
3574 int fd = -1;
3575
3576 TFR(fd = qemu_open(src, flags, 0666));
3577 if (fd == -1) {
3578 error_setg(errp, "open %s: %s", src, strerror(errno));
3579 }
3580 return fd;
3581 }
3582
3583 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3584 {
3585 int flags, in = -1, out = -1;
3586
3587 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
3588 out = qmp_chardev_open_file_source(file->out, flags, errp);
3589 if (error_is_set(errp)) {
3590 return NULL;
3591 }
3592
3593 if (file->in) {
3594 flags = O_RDONLY;
3595 in = qmp_chardev_open_file_source(file->in, flags, errp);
3596 if (error_is_set(errp)) {
3597 qemu_close(out);
3598 return NULL;
3599 }
3600 }
3601
3602 return qemu_chr_open_fd(in, out);
3603 }
3604
3605 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3606 Error **errp)
3607 {
3608 #ifdef HAVE_CHARDEV_TTY
3609 int fd;
3610
3611 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
3612 if (error_is_set(errp)) {
3613 return NULL;
3614 }
3615 qemu_set_nonblock(fd);
3616 return qemu_chr_open_tty_fd(fd);
3617 #else
3618 error_setg(errp, "character device backend type 'serial' not supported");
3619 return NULL;
3620 #endif
3621 }
3622
3623 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3624 Error **errp)
3625 {
3626 #ifdef HAVE_CHARDEV_PARPORT
3627 int fd;
3628
3629 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
3630 if (error_is_set(errp)) {
3631 return NULL;
3632 }
3633 return qemu_chr_open_pp_fd(fd);
3634 #else
3635 error_setg(errp, "character device backend type 'parallel' not supported");
3636 return NULL;
3637 #endif
3638 }
3639
3640 #endif /* WIN32 */
3641
3642 static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
3643 Error **errp)
3644 {
3645 SocketAddress *addr = sock->addr;
3646 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
3647 bool is_listen = sock->has_server ? sock->server : true;
3648 bool is_telnet = sock->has_telnet ? sock->telnet : false;
3649 bool is_waitconnect = sock->has_wait ? sock->wait : false;
3650 int fd;
3651
3652 if (is_listen) {
3653 fd = socket_listen(addr, errp);
3654 } else {
3655 fd = socket_connect(addr, errp, NULL, NULL);
3656 }
3657 if (error_is_set(errp)) {
3658 return NULL;
3659 }
3660 return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
3661 is_telnet, is_waitconnect, errp);
3662 }
3663
3664 static CharDriverState *qmp_chardev_open_dgram(ChardevDgram *dgram,
3665 Error **errp)
3666 {
3667 int fd;
3668
3669 fd = socket_dgram(dgram->remote, dgram->local, errp);
3670 if (error_is_set(errp)) {
3671 return NULL;
3672 }
3673 return qemu_chr_open_udp_fd(fd);
3674 }
3675
3676 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
3677 Error **errp)
3678 {
3679 ChardevReturn *ret = g_new0(ChardevReturn, 1);
3680 CharDriverState *base, *chr = NULL;
3681
3682 chr = qemu_chr_find(id);
3683 if (chr) {
3684 error_setg(errp, "Chardev '%s' already exists", id);
3685 g_free(ret);
3686 return NULL;
3687 }
3688
3689 switch (backend->kind) {
3690 case CHARDEV_BACKEND_KIND_FILE:
3691 chr = qmp_chardev_open_file(backend->file, errp);
3692 break;
3693 case CHARDEV_BACKEND_KIND_SERIAL:
3694 chr = qmp_chardev_open_serial(backend->serial, errp);
3695 break;
3696 case CHARDEV_BACKEND_KIND_PARALLEL:
3697 chr = qmp_chardev_open_parallel(backend->parallel, errp);
3698 break;
3699 case CHARDEV_BACKEND_KIND_PIPE:
3700 chr = qemu_chr_open_pipe(backend->pipe);
3701 break;
3702 case CHARDEV_BACKEND_KIND_SOCKET:
3703 chr = qmp_chardev_open_socket(backend->socket, errp);
3704 break;
3705 case CHARDEV_BACKEND_KIND_DGRAM:
3706 chr = qmp_chardev_open_dgram(backend->dgram, errp);
3707 break;
3708 #ifdef HAVE_CHARDEV_TTY
3709 case CHARDEV_BACKEND_KIND_PTY:
3710 chr = qemu_chr_open_pty(id, ret);
3711 break;
3712 #endif
3713 case CHARDEV_BACKEND_KIND_NULL:
3714 chr = qemu_chr_open_null();
3715 break;
3716 case CHARDEV_BACKEND_KIND_MUX:
3717 base = qemu_chr_find(backend->mux->chardev);
3718 if (base == NULL) {
3719 error_setg(errp, "mux: base chardev %s not found",
3720 backend->mux->chardev);
3721 break;
3722 }
3723 chr = qemu_chr_open_mux(base);
3724 break;
3725 case CHARDEV_BACKEND_KIND_MSMOUSE:
3726 chr = qemu_chr_open_msmouse();
3727 break;
3728 #ifdef CONFIG_BRLAPI
3729 case CHARDEV_BACKEND_KIND_BRAILLE:
3730 chr = chr_baum_init();
3731 break;
3732 #endif
3733 case CHARDEV_BACKEND_KIND_STDIO:
3734 chr = qemu_chr_open_stdio(backend->stdio);
3735 break;
3736 #ifdef _WIN32
3737 case CHARDEV_BACKEND_KIND_CONSOLE:
3738 chr = qemu_chr_open_win_con();
3739 break;
3740 #endif
3741 #ifdef CONFIG_SPICE
3742 case CHARDEV_BACKEND_KIND_SPICEVMC:
3743 chr = qemu_chr_open_spice_vmc(backend->spicevmc->type);
3744 break;
3745 case CHARDEV_BACKEND_KIND_SPICEPORT:
3746 chr = qemu_chr_open_spice_port(backend->spiceport->fqdn);
3747 break;
3748 #endif
3749 case CHARDEV_BACKEND_KIND_VC:
3750 chr = vc_init(backend->vc);
3751 break;
3752 case CHARDEV_BACKEND_KIND_MEMORY:
3753 chr = qemu_chr_open_ringbuf(backend->memory, errp);
3754 break;
3755 default:
3756 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
3757 break;
3758 }
3759
3760 if (chr == NULL && !error_is_set(errp)) {
3761 error_setg(errp, "Failed to create chardev");
3762 }
3763 if (chr) {
3764 chr->label = g_strdup(id);
3765 chr->avail_connections =
3766 (backend->kind == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
3767 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3768 return ret;
3769 } else {
3770 g_free(ret);
3771 return NULL;
3772 }
3773 }
3774
3775 void qmp_chardev_remove(const char *id, Error **errp)
3776 {
3777 CharDriverState *chr;
3778
3779 chr = qemu_chr_find(id);
3780 if (NULL == chr) {
3781 error_setg(errp, "Chardev '%s' not found", id);
3782 return;
3783 }
3784 if (chr->chr_can_read || chr->chr_read ||
3785 chr->chr_event || chr->handler_opaque) {
3786 error_setg(errp, "Chardev '%s' is busy", id);
3787 return;
3788 }
3789 qemu_chr_delete(chr);
3790 }
3791
3792 static void register_types(void)
3793 {
3794 register_char_driver_qapi("null", CHARDEV_BACKEND_KIND_NULL, NULL);
3795 register_char_driver("socket", qemu_chr_open_socket);
3796 register_char_driver("udp", qemu_chr_open_udp);
3797 register_char_driver_qapi("memory", CHARDEV_BACKEND_KIND_MEMORY,
3798 qemu_chr_parse_ringbuf);
3799 register_char_driver_qapi("file", CHARDEV_BACKEND_KIND_FILE,
3800 qemu_chr_parse_file_out);
3801 register_char_driver_qapi("stdio", CHARDEV_BACKEND_KIND_STDIO,
3802 qemu_chr_parse_stdio);
3803 register_char_driver_qapi("serial", CHARDEV_BACKEND_KIND_SERIAL,
3804 qemu_chr_parse_serial);
3805 register_char_driver_qapi("tty", CHARDEV_BACKEND_KIND_SERIAL,
3806 qemu_chr_parse_serial);
3807 register_char_driver_qapi("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
3808 qemu_chr_parse_parallel);
3809 register_char_driver_qapi("parport", CHARDEV_BACKEND_KIND_PARALLEL,
3810 qemu_chr_parse_parallel);
3811 register_char_driver_qapi("pty", CHARDEV_BACKEND_KIND_PTY, NULL);
3812 register_char_driver_qapi("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL);
3813 register_char_driver_qapi("pipe", CHARDEV_BACKEND_KIND_PIPE,
3814 qemu_chr_parse_pipe);
3815 }
3816
3817 type_init(register_types);
AR7 emulation for QEMU