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