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compatfd: switch to QemuThread
[qemu.git] / qemu-char.c
blobe00f84c8e971c690e21fa8e569a22ec4229209bf
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu-common.h"
25 #include "monitor/monitor.h"
26 #include "ui/console.h"
27 #include "sysemu/sysemu.h"
28 #include "qemu/timer.h"
29 #include "sysemu/char.h"
30 #include "hw/usb.h"
31 #include "qmp-commands.h"
32
33 #include <unistd.h>
34 #include <fcntl.h>
35 #include <time.h>
36 #include <errno.h>
37 #include <sys/time.h>
38 #include <zlib.h>
39
40 #ifndef _WIN32
41 #include <sys/times.h>
42 #include <sys/wait.h>
43 #include <termios.h>
44 #include <sys/mman.h>
45 #include <sys/ioctl.h>
46 #include <sys/resource.h>
47 #include <sys/socket.h>
48 #include <netinet/in.h>
49 #include <net/if.h>
50 #include <arpa/inet.h>
51 #include <dirent.h>
52 #include <netdb.h>
53 #include <sys/select.h>
54 #ifdef CONFIG_BSD
55 #include <sys/stat.h>
56 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
57 #include <dev/ppbus/ppi.h>
58 #include <dev/ppbus/ppbconf.h>
59 #elif defined(__DragonFly__)
60 #include <dev/misc/ppi/ppi.h>
61 #include <bus/ppbus/ppbconf.h>
62 #endif
63 #else
64 #ifdef __linux__
65 #include <linux/ppdev.h>
66 #include <linux/parport.h>
67 #endif
68 #ifdef __sun__
69 #include <sys/stat.h>
70 #include <sys/ethernet.h>
71 #include <sys/sockio.h>
72 #include <netinet/arp.h>
73 #include <netinet/in.h>
74 #include <netinet/in_systm.h>
75 #include <netinet/ip.h>
76 #include <netinet/ip_icmp.h> // must come after ip.h
77 #include <netinet/udp.h>
78 #include <netinet/tcp.h>
79 #endif
80 #endif
81 #endif
82
83 #include "qemu/sockets.h"
84 #include "ui/qemu-spice.h"
85
86 #define READ_BUF_LEN 4096
87
88 /***********************************************************/
89 /* character device */
90
91 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
92 QTAILQ_HEAD_INITIALIZER(chardevs);
93
94 void qemu_chr_be_event(CharDriverState *s, int event)
95 {
96 /* Keep track if the char device is open */
97 switch (event) {
98 case CHR_EVENT_OPENED:
99 s->be_open = 1;
100 break;
101 case CHR_EVENT_CLOSED:
102 s->be_open = 0;
103 break;
104 }
105
106 if (!s->chr_event)
107 return;
108 s->chr_event(s->handler_opaque, event);
109 }
110
111 void qemu_chr_be_generic_open(CharDriverState *s)
112 {
113 qemu_chr_be_event(s, CHR_EVENT_OPENED);
114 }
115
116 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
117 {
118 return s->chr_write(s, buf, len);
119 }
120
121 int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len)
122 {
123 int offset = 0;
124 int res;
125
126 while (offset < len) {
127 do {
128 res = s->chr_write(s, buf + offset, len - offset);
129 if (res == -1 && errno == EAGAIN) {
130 g_usleep(100);
131 }
132 } while (res == -1 && errno == EAGAIN);
133
134 if (res == 0) {
135 break;
136 }
137
138 if (res < 0) {
139 return res;
140 }
141
142 offset += res;
143 }
144
145 return offset;
146 }
147
148 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
149 {
150 if (!s->chr_ioctl)
151 return -ENOTSUP;
152 return s->chr_ioctl(s, cmd, arg);
153 }
154
155 int qemu_chr_be_can_write(CharDriverState *s)
156 {
157 if (!s->chr_can_read)
158 return 0;
159 return s->chr_can_read(s->handler_opaque);
160 }
161
162 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
163 {
164 if (s->chr_read) {
165 s->chr_read(s->handler_opaque, buf, len);
166 }
167 }
168
169 int qemu_chr_fe_get_msgfd(CharDriverState *s)
170 {
171 return s->get_msgfd ? s->get_msgfd(s) : -1;
172 }
173
174 int qemu_chr_add_client(CharDriverState *s, int fd)
175 {
176 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
177 }
178
179 void qemu_chr_accept_input(CharDriverState *s)
180 {
181 if (s->chr_accept_input)
182 s->chr_accept_input(s);
183 qemu_notify_event();
184 }
185
186 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
187 {
188 char buf[READ_BUF_LEN];
189 va_list ap;
190 va_start(ap, fmt);
191 vsnprintf(buf, sizeof(buf), fmt, ap);
192 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
193 va_end(ap);
194 }
195
196 static void remove_fd_in_watch(CharDriverState *chr);
197
198 void qemu_chr_add_handlers(CharDriverState *s,
199 IOCanReadHandler *fd_can_read,
200 IOReadHandler *fd_read,
201 IOEventHandler *fd_event,
202 void *opaque)
203 {
204 int fe_open;
205
206 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
207 fe_open = 0;
208 remove_fd_in_watch(s);
209 } else {
210 fe_open = 1;
211 }
212 s->chr_can_read = fd_can_read;
213 s->chr_read = fd_read;
214 s->chr_event = fd_event;
215 s->handler_opaque = opaque;
216 if (s->chr_update_read_handler)
217 s->chr_update_read_handler(s);
218
219 if (!s->explicit_fe_open) {
220 qemu_chr_fe_set_open(s, fe_open);
221 }
222
223 /* We're connecting to an already opened device, so let's make sure we
224 also get the open event */
225 if (fe_open && s->be_open) {
226 qemu_chr_be_generic_open(s);
227 }
228 }
229
230 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
231 {
232 return len;
233 }
234
235 static CharDriverState *qemu_chr_open_null(void)
236 {
237 CharDriverState *chr;
238
239 chr = g_malloc0(sizeof(CharDriverState));
240 chr->chr_write = null_chr_write;
241 chr->explicit_be_open = true;
242 return chr;
243 }
244
245 /* MUX driver for serial I/O splitting */
246 #define MAX_MUX 4
247 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
248 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
249 typedef struct {
250 IOCanReadHandler *chr_can_read[MAX_MUX];
251 IOReadHandler *chr_read[MAX_MUX];
252 IOEventHandler *chr_event[MAX_MUX];
253 void *ext_opaque[MAX_MUX];
254 CharDriverState *drv;
255 int focus;
256 int mux_cnt;
257 int term_got_escape;
258 int max_size;
259 /* Intermediate input buffer allows to catch escape sequences even if the
260 currently active device is not accepting any input - but only until it
261 is full as well. */
262 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
263 int prod[MAX_MUX];
264 int cons[MAX_MUX];
265 int timestamps;
266 int linestart;
267 int64_t timestamps_start;
268 } MuxDriver;
269
270
271 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
272 {
273 MuxDriver *d = chr->opaque;
274 int ret;
275 if (!d->timestamps) {
276 ret = d->drv->chr_write(d->drv, buf, len);
277 } else {
278 int i;
279
280 ret = 0;
281 for (i = 0; i < len; i++) {
282 if (d->linestart) {
283 char buf1[64];
284 int64_t ti;
285 int secs;
286
287 ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
288 if (d->timestamps_start == -1)
289 d->timestamps_start = ti;
290 ti -= d->timestamps_start;
291 secs = ti / 1000;
292 snprintf(buf1, sizeof(buf1),
293 "[%02d:%02d:%02d.%03d] ",
294 secs / 3600,
295 (secs / 60) % 60,
296 secs % 60,
297 (int)(ti % 1000));
298 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
299 d->linestart = 0;
300 }
301 ret += d->drv->chr_write(d->drv, buf+i, 1);
302 if (buf[i] == '\n') {
303 d->linestart = 1;
304 }
305 }
306 }
307 return ret;
308 }
309
310 static const char * const mux_help[] = {
311 "% h print this help\n\r",
312 "% x exit emulator\n\r",
313 "% s save disk data back to file (if -snapshot)\n\r",
314 "% t toggle console timestamps\n\r"
315 "% b send break (magic sysrq)\n\r",
316 "% c switch between console and monitor\n\r",
317 "% % sends %\n\r",
318 NULL
319 };
320
321 int term_escape_char = 0x01; /* ctrl-a is used for escape */
322 static void mux_print_help(CharDriverState *chr)
323 {
324 int i, j;
325 char ebuf[15] = "Escape-Char";
326 char cbuf[50] = "\n\r";
327
328 if (term_escape_char > 0 && term_escape_char < 26) {
329 snprintf(cbuf, sizeof(cbuf), "\n\r");
330 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
331 } else {
332 snprintf(cbuf, sizeof(cbuf),
333 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
334 term_escape_char);
335 }
336 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
337 for (i = 0; mux_help[i] != NULL; i++) {
338 for (j=0; mux_help[i][j] != '\0'; j++) {
339 if (mux_help[i][j] == '%')
340 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
341 else
342 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
343 }
344 }
345 }
346
347 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
348 {
349 if (d->chr_event[mux_nr])
350 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
351 }
352
353 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
354 {
355 if (d->term_got_escape) {
356 d->term_got_escape = 0;
357 if (ch == term_escape_char)
358 goto send_char;
359 switch(ch) {
360 case '?':
361 case 'h':
362 mux_print_help(chr);
363 break;
364 case 'x':
365 {
366 const char *term = "QEMU: Terminated\n\r";
367 chr->chr_write(chr,(uint8_t *)term,strlen(term));
368 exit(0);
369 break;
370 }
371 case 's':
372 bdrv_commit_all();
373 break;
374 case 'b':
375 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
376 break;
377 case 'c':
378 /* Switch to the next registered device */
379 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
380 d->focus++;
381 if (d->focus >= d->mux_cnt)
382 d->focus = 0;
383 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
384 break;
385 case 't':
386 d->timestamps = !d->timestamps;
387 d->timestamps_start = -1;
388 d->linestart = 0;
389 break;
390 }
391 } else if (ch == term_escape_char) {
392 d->term_got_escape = 1;
393 } else {
394 send_char:
395 return 1;
396 }
397 return 0;
398 }
399
400 static void mux_chr_accept_input(CharDriverState *chr)
401 {
402 MuxDriver *d = chr->opaque;
403 int m = d->focus;
404
405 while (d->prod[m] != d->cons[m] &&
406 d->chr_can_read[m] &&
407 d->chr_can_read[m](d->ext_opaque[m])) {
408 d->chr_read[m](d->ext_opaque[m],
409 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
410 }
411 }
412
413 static int mux_chr_can_read(void *opaque)
414 {
415 CharDriverState *chr = opaque;
416 MuxDriver *d = chr->opaque;
417 int m = d->focus;
418
419 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
420 return 1;
421 if (d->chr_can_read[m])
422 return d->chr_can_read[m](d->ext_opaque[m]);
423 return 0;
424 }
425
426 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
427 {
428 CharDriverState *chr = opaque;
429 MuxDriver *d = chr->opaque;
430 int m = d->focus;
431 int i;
432
433 mux_chr_accept_input (opaque);
434
435 for(i = 0; i < size; i++)
436 if (mux_proc_byte(chr, d, buf[i])) {
437 if (d->prod[m] == d->cons[m] &&
438 d->chr_can_read[m] &&
439 d->chr_can_read[m](d->ext_opaque[m]))
440 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
441 else
442 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
443 }
444 }
445
446 static void mux_chr_event(void *opaque, int event)
447 {
448 CharDriverState *chr = opaque;
449 MuxDriver *d = chr->opaque;
450 int i;
451
452 /* Send the event to all registered listeners */
453 for (i = 0; i < d->mux_cnt; i++)
454 mux_chr_send_event(d, i, event);
455 }
456
457 static void mux_chr_update_read_handler(CharDriverState *chr)
458 {
459 MuxDriver *d = chr->opaque;
460
461 if (d->mux_cnt >= MAX_MUX) {
462 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
463 return;
464 }
465 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
466 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
467 d->chr_read[d->mux_cnt] = chr->chr_read;
468 d->chr_event[d->mux_cnt] = chr->chr_event;
469 /* Fix up the real driver with mux routines */
470 if (d->mux_cnt == 0) {
471 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
472 mux_chr_event, chr);
473 }
474 if (d->focus != -1) {
475 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
476 }
477 d->focus = d->mux_cnt;
478 d->mux_cnt++;
479 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
480 }
481
482 static bool muxes_realized;
483
484 /**
485 * Called after processing of default and command-line-specified
486 * chardevs to deliver CHR_EVENT_OPENED events to any FEs attached
487 * to a mux chardev. This is done here to ensure that
488 * output/prompts/banners are only displayed for the FE that has
489 * focus when initial command-line processing/machine init is
490 * completed.
491 *
492 * After this point, any new FE attached to any new or existing
493 * mux will receive CHR_EVENT_OPENED notifications for the BE
494 * immediately.
495 */
496 static void muxes_realize_done(Notifier *notifier, void *unused)
497 {
498 CharDriverState *chr;
499
500 QTAILQ_FOREACH(chr, &chardevs, next) {
501 if (chr->is_mux) {
502 MuxDriver *d = chr->opaque;
503 int i;
504
505 /* send OPENED to all already-attached FEs */
506 for (i = 0; i < d->mux_cnt; i++) {
507 mux_chr_send_event(d, i, CHR_EVENT_OPENED);
508 }
509 /* mark mux as OPENED so any new FEs will immediately receive
510 * OPENED event
511 */
512 qemu_chr_be_generic_open(chr);
513 }
514 }
515 muxes_realized = true;
516 }
517
518 static Notifier muxes_realize_notify = {
519 .notify = muxes_realize_done,
520 };
521
522 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
523 {
524 CharDriverState *chr;
525 MuxDriver *d;
526
527 chr = g_malloc0(sizeof(CharDriverState));
528 d = g_malloc0(sizeof(MuxDriver));
529
530 chr->opaque = d;
531 d->drv = drv;
532 d->focus = -1;
533 chr->chr_write = mux_chr_write;
534 chr->chr_update_read_handler = mux_chr_update_read_handler;
535 chr->chr_accept_input = mux_chr_accept_input;
536 /* Frontend guest-open / -close notification is not support with muxes */
537 chr->chr_set_fe_open = NULL;
538 /* only default to opened state if we've realized the initial
539 * set of muxes
540 */
541 chr->explicit_be_open = muxes_realized ? 0 : 1;
542 chr->is_mux = 1;
543
544 return chr;
545 }
546
547
548 #ifdef _WIN32
549 int send_all(int fd, const void *buf, int len1)
550 {
551 int ret, len;
552
553 len = len1;
554 while (len > 0) {
555 ret = send(fd, buf, len, 0);
556 if (ret < 0) {
557 errno = WSAGetLastError();
558 if (errno != WSAEWOULDBLOCK) {
559 return -1;
560 }
561 } else if (ret == 0) {
562 break;
563 } else {
564 buf += ret;
565 len -= ret;
566 }
567 }
568 return len1 - len;
569 }
570
571 #else
572
573 int send_all(int fd, const void *_buf, int len1)
574 {
575 int ret, len;
576 const uint8_t *buf = _buf;
577
578 len = len1;
579 while (len > 0) {
580 ret = write(fd, buf, len);
581 if (ret < 0) {
582 if (errno != EINTR && errno != EAGAIN)
583 return -1;
584 } else if (ret == 0) {
585 break;
586 } else {
587 buf += ret;
588 len -= ret;
589 }
590 }
591 return len1 - len;
592 }
593
594 int recv_all(int fd, void *_buf, int len1, bool single_read)
595 {
596 int ret, len;
597 uint8_t *buf = _buf;
598
599 len = len1;
600 while ((len > 0) && (ret = read(fd, buf, len)) != 0) {
601 if (ret < 0) {
602 if (errno != EINTR && errno != EAGAIN) {
603 return -1;
604 }
605 continue;
606 } else {
607 if (single_read) {
608 return ret;
609 }
610 buf += ret;
611 len -= ret;
612 }
613 }
614 return len1 - len;
615 }
616
617 #endif /* !_WIN32 */
618
619 typedef struct IOWatchPoll
620 {
621 GSource parent;
622
623 GIOChannel *channel;
624 GSource *src;
625
626 IOCanReadHandler *fd_can_read;
627 GSourceFunc fd_read;
628 void *opaque;
629 } IOWatchPoll;
630
631 static IOWatchPoll *io_watch_poll_from_source(GSource *source)
632 {
633 return container_of(source, IOWatchPoll, parent);
634 }
635
636 static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_)
637 {
638 IOWatchPoll *iwp = io_watch_poll_from_source(source);
639 bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
640 bool was_active = iwp->src != NULL;
641 if (was_active == now_active) {
642 return FALSE;
643 }
644
645 if (now_active) {
646 iwp->src = g_io_create_watch(iwp->channel, G_IO_IN | G_IO_ERR | G_IO_HUP);
647 g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
648 g_source_attach(iwp->src, NULL);
649 } else {
650 g_source_destroy(iwp->src);
651 g_source_unref(iwp->src);
652 iwp->src = NULL;
653 }
654 return FALSE;
655 }
656
657 static gboolean io_watch_poll_check(GSource *source)
658 {
659 return FALSE;
660 }
661
662 static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
663 gpointer user_data)
664 {
665 abort();
666 }
667
668 static void io_watch_poll_finalize(GSource *source)
669 {
670 /* Due to a glib bug, removing the last reference to a source
671 * inside a finalize callback causes recursive locking (and a
672 * deadlock). This is not a problem inside other callbacks,
673 * including dispatch callbacks, so we call io_remove_watch_poll
674 * to remove this source. At this point, iwp->src must
675 * be NULL, or we would leak it.
676 *
677 * This would be solved much more elegantly by child sources,
678 * but we support older glib versions that do not have them.
679 */
680 IOWatchPoll *iwp = io_watch_poll_from_source(source);
681 assert(iwp->src == NULL);
682 }
683
684 static GSourceFuncs io_watch_poll_funcs = {
685 .prepare = io_watch_poll_prepare,
686 .check = io_watch_poll_check,
687 .dispatch = io_watch_poll_dispatch,
688 .finalize = io_watch_poll_finalize,
689 };
690
691 /* Can only be used for read */
692 static guint io_add_watch_poll(GIOChannel *channel,
693 IOCanReadHandler *fd_can_read,
694 GIOFunc fd_read,
695 gpointer user_data)
696 {
697 IOWatchPoll *iwp;
698 int tag;
699
700 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll));
701 iwp->fd_can_read = fd_can_read;
702 iwp->opaque = user_data;
703 iwp->channel = channel;
704 iwp->fd_read = (GSourceFunc) fd_read;
705 iwp->src = NULL;
706
707 tag = g_source_attach(&iwp->parent, NULL);
708 g_source_unref(&iwp->parent);
709 return tag;
710 }
711
712 static void io_remove_watch_poll(guint tag)
713 {
714 GSource *source;
715 IOWatchPoll *iwp;
716
717 g_return_if_fail (tag > 0);
718
719 source = g_main_context_find_source_by_id(NULL, tag);
720 g_return_if_fail (source != NULL);
721
722 iwp = io_watch_poll_from_source(source);
723 if (iwp->src) {
724 g_source_destroy(iwp->src);
725 g_source_unref(iwp->src);
726 iwp->src = NULL;
727 }
728 g_source_destroy(&iwp->parent);
729 }
730
731 static void remove_fd_in_watch(CharDriverState *chr)
732 {
733 if (chr->fd_in_tag) {
734 io_remove_watch_poll(chr->fd_in_tag);
735 chr->fd_in_tag = 0;
736 }
737 }
738
739 #ifndef _WIN32
740 static GIOChannel *io_channel_from_fd(int fd)
741 {
742 GIOChannel *chan;
743
744 if (fd == -1) {
745 return NULL;
746 }
747
748 chan = g_io_channel_unix_new(fd);
749
750 g_io_channel_set_encoding(chan, NULL, NULL);
751 g_io_channel_set_buffered(chan, FALSE);
752
753 return chan;
754 }
755 #endif
756
757 static GIOChannel *io_channel_from_socket(int fd)
758 {
759 GIOChannel *chan;
760
761 if (fd == -1) {
762 return NULL;
763 }
764
765 #ifdef _WIN32
766 chan = g_io_channel_win32_new_socket(fd);
767 #else
768 chan = g_io_channel_unix_new(fd);
769 #endif
770
771 g_io_channel_set_encoding(chan, NULL, NULL);
772 g_io_channel_set_buffered(chan, FALSE);
773
774 return chan;
775 }
776
777 static int io_channel_send(GIOChannel *fd, const void *buf, size_t len)
778 {
779 size_t offset = 0;
780 GIOStatus status = G_IO_STATUS_NORMAL;
781
782 while (offset < len && status == G_IO_STATUS_NORMAL) {
783 gsize bytes_written = 0;
784
785 status = g_io_channel_write_chars(fd, buf + offset, len - offset,
786 &bytes_written, NULL);
787 offset += bytes_written;
788 }
789
790 if (offset > 0) {
791 return offset;
792 }
793 switch (status) {
794 case G_IO_STATUS_NORMAL:
795 g_assert(len == 0);
796 return 0;
797 case G_IO_STATUS_AGAIN:
798 errno = EAGAIN;
799 return -1;
800 default:
801 break;
802 }
803 errno = EINVAL;
804 return -1;
805 }
806
807 #ifndef _WIN32
808
809 typedef struct FDCharDriver {
810 CharDriverState *chr;
811 GIOChannel *fd_in, *fd_out;
812 int max_size;
813 QTAILQ_ENTRY(FDCharDriver) node;
814 } FDCharDriver;
815
816 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
817 {
818 FDCharDriver *s = chr->opaque;
819
820 return io_channel_send(s->fd_out, buf, len);
821 }
822
823 static gboolean fd_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
824 {
825 CharDriverState *chr = opaque;
826 FDCharDriver *s = chr->opaque;
827 int len;
828 uint8_t buf[READ_BUF_LEN];
829 GIOStatus status;
830 gsize bytes_read;
831
832 len = sizeof(buf);
833 if (len > s->max_size) {
834 len = s->max_size;
835 }
836 if (len == 0) {
837 return TRUE;
838 }
839
840 status = g_io_channel_read_chars(chan, (gchar *)buf,
841 len, &bytes_read, NULL);
842 if (status == G_IO_STATUS_EOF) {
843 remove_fd_in_watch(chr);
844 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
845 return FALSE;
846 }
847 if (status == G_IO_STATUS_NORMAL) {
848 qemu_chr_be_write(chr, buf, bytes_read);
849 }
850
851 return TRUE;
852 }
853
854 static int fd_chr_read_poll(void *opaque)
855 {
856 CharDriverState *chr = opaque;
857 FDCharDriver *s = chr->opaque;
858
859 s->max_size = qemu_chr_be_can_write(chr);
860 return s->max_size;
861 }
862
863 static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
864 {
865 FDCharDriver *s = chr->opaque;
866 return g_io_create_watch(s->fd_out, cond);
867 }
868
869 static void fd_chr_update_read_handler(CharDriverState *chr)
870 {
871 FDCharDriver *s = chr->opaque;
872
873 remove_fd_in_watch(chr);
874 if (s->fd_in) {
875 chr->fd_in_tag = io_add_watch_poll(s->fd_in, fd_chr_read_poll,
876 fd_chr_read, chr);
877 }
878 }
879
880 static void fd_chr_close(struct CharDriverState *chr)
881 {
882 FDCharDriver *s = chr->opaque;
883
884 remove_fd_in_watch(chr);
885 if (s->fd_in) {
886 g_io_channel_unref(s->fd_in);
887 }
888 if (s->fd_out) {
889 g_io_channel_unref(s->fd_out);
890 }
891
892 g_free(s);
893 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
894 }
895
896 /* open a character device to a unix fd */
897 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
898 {
899 CharDriverState *chr;
900 FDCharDriver *s;
901
902 chr = g_malloc0(sizeof(CharDriverState));
903 s = g_malloc0(sizeof(FDCharDriver));
904 s->fd_in = io_channel_from_fd(fd_in);
905 s->fd_out = io_channel_from_fd(fd_out);
906 fcntl(fd_out, F_SETFL, O_NONBLOCK);
907 s->chr = chr;
908 chr->opaque = s;
909 chr->chr_add_watch = fd_chr_add_watch;
910 chr->chr_write = fd_chr_write;
911 chr->chr_update_read_handler = fd_chr_update_read_handler;
912 chr->chr_close = fd_chr_close;
913
914 return chr;
915 }
916
917 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
918 {
919 int fd_in, fd_out;
920 char filename_in[256], filename_out[256];
921 const char *filename = opts->device;
922
923 if (filename == NULL) {
924 fprintf(stderr, "chardev: pipe: no filename given\n");
925 return NULL;
926 }
927
928 snprintf(filename_in, 256, "%s.in", filename);
929 snprintf(filename_out, 256, "%s.out", filename);
930 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
931 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
932 if (fd_in < 0 || fd_out < 0) {
933 if (fd_in >= 0)
934 close(fd_in);
935 if (fd_out >= 0)
936 close(fd_out);
937 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
938 if (fd_in < 0) {
939 return NULL;
940 }
941 }
942 return qemu_chr_open_fd(fd_in, fd_out);
943 }
944
945 /* init terminal so that we can grab keys */
946 static struct termios oldtty;
947 static int old_fd0_flags;
948 static bool stdio_allow_signal;
949
950 static void term_exit(void)
951 {
952 tcsetattr (0, TCSANOW, &oldtty);
953 fcntl(0, F_SETFL, old_fd0_flags);
954 }
955
956 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
957 {
958 struct termios tty;
959
960 tty = oldtty;
961 if (!echo) {
962 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
963 |INLCR|IGNCR|ICRNL|IXON);
964 tty.c_oflag |= OPOST;
965 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
966 tty.c_cflag &= ~(CSIZE|PARENB);
967 tty.c_cflag |= CS8;
968 tty.c_cc[VMIN] = 1;
969 tty.c_cc[VTIME] = 0;
970 }
971 if (!stdio_allow_signal)
972 tty.c_lflag &= ~ISIG;
973
974 tcsetattr (0, TCSANOW, &tty);
975 }
976
977 static void qemu_chr_close_stdio(struct CharDriverState *chr)
978 {
979 term_exit();
980 fd_chr_close(chr);
981 }
982
983 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
984 {
985 CharDriverState *chr;
986
987 if (is_daemonized()) {
988 error_report("cannot use stdio with -daemonize");
989 return NULL;
990 }
991 old_fd0_flags = fcntl(0, F_GETFL);
992 tcgetattr (0, &oldtty);
993 fcntl(0, F_SETFL, O_NONBLOCK);
994 atexit(term_exit);
995
996 chr = qemu_chr_open_fd(0, 1);
997 chr->chr_close = qemu_chr_close_stdio;
998 chr->chr_set_echo = qemu_chr_set_echo_stdio;
999 if (opts->has_signal) {
1000 stdio_allow_signal = opts->signal;
1001 }
1002 qemu_chr_fe_set_echo(chr, false);
1003
1004 return chr;
1005 }
1006
1007 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1008 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
1009 || defined(__GLIBC__)
1010
1011 #define HAVE_CHARDEV_TTY 1
1012
1013 typedef struct {
1014 GIOChannel *fd;
1015 int connected;
1016 int read_bytes;
1017 guint timer_tag;
1018 } PtyCharDriver;
1019
1020 static void pty_chr_update_read_handler(CharDriverState *chr);
1021 static void pty_chr_state(CharDriverState *chr, int connected);
1022
1023 static gboolean pty_chr_timer(gpointer opaque)
1024 {
1025 struct CharDriverState *chr = opaque;
1026 PtyCharDriver *s = chr->opaque;
1027
1028 s->timer_tag = 0;
1029 if (!s->connected) {
1030 /* Next poll ... */
1031 pty_chr_update_read_handler(chr);
1032 }
1033 return FALSE;
1034 }
1035
1036 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1037 {
1038 PtyCharDriver *s = chr->opaque;
1039
1040 if (s->timer_tag) {
1041 g_source_remove(s->timer_tag);
1042 s->timer_tag = 0;
1043 }
1044
1045 if (ms == 1000) {
1046 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1047 } else {
1048 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1049 }
1050 }
1051
1052 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1053 {
1054 PtyCharDriver *s = chr->opaque;
1055
1056 if (!s->connected) {
1057 /* guest sends data, check for (re-)connect */
1058 pty_chr_update_read_handler(chr);
1059 return 0;
1060 }
1061 return io_channel_send(s->fd, buf, len);
1062 }
1063
1064 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1065 {
1066 PtyCharDriver *s = chr->opaque;
1067 return g_io_create_watch(s->fd, cond);
1068 }
1069
1070 static int pty_chr_read_poll(void *opaque)
1071 {
1072 CharDriverState *chr = opaque;
1073 PtyCharDriver *s = chr->opaque;
1074
1075 s->read_bytes = qemu_chr_be_can_write(chr);
1076 return s->read_bytes;
1077 }
1078
1079 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1080 {
1081 CharDriverState *chr = opaque;
1082 PtyCharDriver *s = chr->opaque;
1083 gsize size, len;
1084 uint8_t buf[READ_BUF_LEN];
1085 GIOStatus status;
1086
1087 len = sizeof(buf);
1088 if (len > s->read_bytes)
1089 len = s->read_bytes;
1090 if (len == 0) {
1091 return TRUE;
1092 }
1093 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1094 if (status != G_IO_STATUS_NORMAL) {
1095 pty_chr_state(chr, 0);
1096 return FALSE;
1097 } else {
1098 pty_chr_state(chr, 1);
1099 qemu_chr_be_write(chr, buf, size);
1100 }
1101 return TRUE;
1102 }
1103
1104 static void pty_chr_update_read_handler(CharDriverState *chr)
1105 {
1106 PtyCharDriver *s = chr->opaque;
1107 GPollFD pfd;
1108
1109 pfd.fd = g_io_channel_unix_get_fd(s->fd);
1110 pfd.events = G_IO_OUT;
1111 pfd.revents = 0;
1112 g_poll(&pfd, 1, 0);
1113 if (pfd.revents & G_IO_HUP) {
1114 pty_chr_state(chr, 0);
1115 } else {
1116 pty_chr_state(chr, 1);
1117 }
1118 }
1119
1120 static void pty_chr_state(CharDriverState *chr, int connected)
1121 {
1122 PtyCharDriver *s = chr->opaque;
1123
1124 if (!connected) {
1125 remove_fd_in_watch(chr);
1126 s->connected = 0;
1127 /* (re-)connect poll interval for idle guests: once per second.
1128 * We check more frequently in case the guests sends data to
1129 * the virtual device linked to our pty. */
1130 pty_chr_rearm_timer(chr, 1000);
1131 } else {
1132 if (s->timer_tag) {
1133 g_source_remove(s->timer_tag);
1134 s->timer_tag = 0;
1135 }
1136 if (!s->connected) {
1137 s->connected = 1;
1138 qemu_chr_be_generic_open(chr);
1139 chr->fd_in_tag = io_add_watch_poll(s->fd, pty_chr_read_poll,
1140 pty_chr_read, chr);
1141 }
1142 }
1143 }
1144
1145
1146 static void pty_chr_close(struct CharDriverState *chr)
1147 {
1148 PtyCharDriver *s = chr->opaque;
1149 int fd;
1150
1151 remove_fd_in_watch(chr);
1152 fd = g_io_channel_unix_get_fd(s->fd);
1153 g_io_channel_unref(s->fd);
1154 close(fd);
1155 if (s->timer_tag) {
1156 g_source_remove(s->timer_tag);
1157 s->timer_tag = 0;
1158 }
1159 g_free(s);
1160 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1161 }
1162
1163 static CharDriverState *qemu_chr_open_pty(const char *id,
1164 ChardevReturn *ret)
1165 {
1166 CharDriverState *chr;
1167 PtyCharDriver *s;
1168 int master_fd, slave_fd;
1169 char pty_name[PATH_MAX];
1170
1171 master_fd = qemu_openpty_raw(&slave_fd, pty_name);
1172 if (master_fd < 0) {
1173 return NULL;
1174 }
1175
1176 close(slave_fd);
1177
1178 chr = g_malloc0(sizeof(CharDriverState));
1179
1180 chr->filename = g_strdup_printf("pty:%s", pty_name);
1181 ret->pty = g_strdup(pty_name);
1182 ret->has_pty = true;
1183
1184 fprintf(stderr, "char device redirected to %s (label %s)\n",
1185 pty_name, id);
1186
1187 s = g_malloc0(sizeof(PtyCharDriver));
1188 chr->opaque = s;
1189 chr->chr_write = pty_chr_write;
1190 chr->chr_update_read_handler = pty_chr_update_read_handler;
1191 chr->chr_close = pty_chr_close;
1192 chr->chr_add_watch = pty_chr_add_watch;
1193 chr->explicit_be_open = true;
1194
1195 s->fd = io_channel_from_fd(master_fd);
1196 s->timer_tag = 0;
1197
1198 return chr;
1199 }
1200
1201 static void tty_serial_init(int fd, int speed,
1202 int parity, int data_bits, int stop_bits)
1203 {
1204 struct termios tty;
1205 speed_t spd;
1206
1207 #if 0
1208 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1209 speed, parity, data_bits, stop_bits);
1210 #endif
1211 tcgetattr (fd, &tty);
1212
1213 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1214 speed = speed * 10 / 11;
1215 do {
1216 check_speed(50);
1217 check_speed(75);
1218 check_speed(110);
1219 check_speed(134);
1220 check_speed(150);
1221 check_speed(200);
1222 check_speed(300);
1223 check_speed(600);
1224 check_speed(1200);
1225 check_speed(1800);
1226 check_speed(2400);
1227 check_speed(4800);
1228 check_speed(9600);
1229 check_speed(19200);
1230 check_speed(38400);
1231 /* Non-Posix values follow. They may be unsupported on some systems. */
1232 check_speed(57600);
1233 check_speed(115200);
1234 #ifdef B230400
1235 check_speed(230400);
1236 #endif
1237 #ifdef B460800
1238 check_speed(460800);
1239 #endif
1240 #ifdef B500000
1241 check_speed(500000);
1242 #endif
1243 #ifdef B576000
1244 check_speed(576000);
1245 #endif
1246 #ifdef B921600
1247 check_speed(921600);
1248 #endif
1249 #ifdef B1000000
1250 check_speed(1000000);
1251 #endif
1252 #ifdef B1152000
1253 check_speed(1152000);
1254 #endif
1255 #ifdef B1500000
1256 check_speed(1500000);
1257 #endif
1258 #ifdef B2000000
1259 check_speed(2000000);
1260 #endif
1261 #ifdef B2500000
1262 check_speed(2500000);
1263 #endif
1264 #ifdef B3000000
1265 check_speed(3000000);
1266 #endif
1267 #ifdef B3500000
1268 check_speed(3500000);
1269 #endif
1270 #ifdef B4000000
1271 check_speed(4000000);
1272 #endif
1273 spd = B115200;
1274 } while (0);
1275
1276 cfsetispeed(&tty, spd);
1277 cfsetospeed(&tty, spd);
1278
1279 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1280 |INLCR|IGNCR|ICRNL|IXON);
1281 tty.c_oflag |= OPOST;
1282 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1283 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1284 switch(data_bits) {
1285 default:
1286 case 8:
1287 tty.c_cflag |= CS8;
1288 break;
1289 case 7:
1290 tty.c_cflag |= CS7;
1291 break;
1292 case 6:
1293 tty.c_cflag |= CS6;
1294 break;
1295 case 5:
1296 tty.c_cflag |= CS5;
1297 break;
1298 }
1299 switch(parity) {
1300 default:
1301 case 'N':
1302 break;
1303 case 'E':
1304 tty.c_cflag |= PARENB;
1305 break;
1306 case 'O':
1307 tty.c_cflag |= PARENB | PARODD;
1308 break;
1309 }
1310 if (stop_bits == 2)
1311 tty.c_cflag |= CSTOPB;
1312
1313 tcsetattr (fd, TCSANOW, &tty);
1314 }
1315
1316 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1317 {
1318 FDCharDriver *s = chr->opaque;
1319
1320 switch(cmd) {
1321 case CHR_IOCTL_SERIAL_SET_PARAMS:
1322 {
1323 QEMUSerialSetParams *ssp = arg;
1324 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1325 ssp->speed, ssp->parity,
1326 ssp->data_bits, ssp->stop_bits);
1327 }
1328 break;
1329 case CHR_IOCTL_SERIAL_SET_BREAK:
1330 {
1331 int enable = *(int *)arg;
1332 if (enable) {
1333 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1334 }
1335 }
1336 break;
1337 case CHR_IOCTL_SERIAL_GET_TIOCM:
1338 {
1339 int sarg = 0;
1340 int *targ = (int *)arg;
1341 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1342 *targ = 0;
1343 if (sarg & TIOCM_CTS)
1344 *targ |= CHR_TIOCM_CTS;
1345 if (sarg & TIOCM_CAR)
1346 *targ |= CHR_TIOCM_CAR;
1347 if (sarg & TIOCM_DSR)
1348 *targ |= CHR_TIOCM_DSR;
1349 if (sarg & TIOCM_RI)
1350 *targ |= CHR_TIOCM_RI;
1351 if (sarg & TIOCM_DTR)
1352 *targ |= CHR_TIOCM_DTR;
1353 if (sarg & TIOCM_RTS)
1354 *targ |= CHR_TIOCM_RTS;
1355 }
1356 break;
1357 case CHR_IOCTL_SERIAL_SET_TIOCM:
1358 {
1359 int sarg = *(int *)arg;
1360 int targ = 0;
1361 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1362 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1363 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1364 if (sarg & CHR_TIOCM_CTS)
1365 targ |= TIOCM_CTS;
1366 if (sarg & CHR_TIOCM_CAR)
1367 targ |= TIOCM_CAR;
1368 if (sarg & CHR_TIOCM_DSR)
1369 targ |= TIOCM_DSR;
1370 if (sarg & CHR_TIOCM_RI)
1371 targ |= TIOCM_RI;
1372 if (sarg & CHR_TIOCM_DTR)
1373 targ |= TIOCM_DTR;
1374 if (sarg & CHR_TIOCM_RTS)
1375 targ |= TIOCM_RTS;
1376 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1377 }
1378 break;
1379 default:
1380 return -ENOTSUP;
1381 }
1382 return 0;
1383 }
1384
1385 static void qemu_chr_close_tty(CharDriverState *chr)
1386 {
1387 FDCharDriver *s = chr->opaque;
1388 int fd = -1;
1389
1390 if (s) {
1391 fd = g_io_channel_unix_get_fd(s->fd_in);
1392 }
1393
1394 fd_chr_close(chr);
1395
1396 if (fd >= 0) {
1397 close(fd);
1398 }
1399 }
1400
1401 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1402 {
1403 CharDriverState *chr;
1404
1405 tty_serial_init(fd, 115200, 'N', 8, 1);
1406 chr = qemu_chr_open_fd(fd, fd);
1407 chr->chr_ioctl = tty_serial_ioctl;
1408 chr->chr_close = qemu_chr_close_tty;
1409 return chr;
1410 }
1411 #endif /* __linux__ || __sun__ */
1412
1413 #if defined(__linux__)
1414
1415 #define HAVE_CHARDEV_PARPORT 1
1416
1417 typedef struct {
1418 int fd;
1419 int mode;
1420 } ParallelCharDriver;
1421
1422 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1423 {
1424 if (s->mode != mode) {
1425 int m = mode;
1426 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1427 return 0;
1428 s->mode = mode;
1429 }
1430 return 1;
1431 }
1432
1433 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1434 {
1435 ParallelCharDriver *drv = chr->opaque;
1436 int fd = drv->fd;
1437 uint8_t b;
1438
1439 switch(cmd) {
1440 case CHR_IOCTL_PP_READ_DATA:
1441 if (ioctl(fd, PPRDATA, &b) < 0)
1442 return -ENOTSUP;
1443 *(uint8_t *)arg = b;
1444 break;
1445 case CHR_IOCTL_PP_WRITE_DATA:
1446 b = *(uint8_t *)arg;
1447 if (ioctl(fd, PPWDATA, &b) < 0)
1448 return -ENOTSUP;
1449 break;
1450 case CHR_IOCTL_PP_READ_CONTROL:
1451 if (ioctl(fd, PPRCONTROL, &b) < 0)
1452 return -ENOTSUP;
1453 /* Linux gives only the lowest bits, and no way to know data
1454 direction! For better compatibility set the fixed upper
1455 bits. */
1456 *(uint8_t *)arg = b | 0xc0;
1457 break;
1458 case CHR_IOCTL_PP_WRITE_CONTROL:
1459 b = *(uint8_t *)arg;
1460 if (ioctl(fd, PPWCONTROL, &b) < 0)
1461 return -ENOTSUP;
1462 break;
1463 case CHR_IOCTL_PP_READ_STATUS:
1464 if (ioctl(fd, PPRSTATUS, &b) < 0)
1465 return -ENOTSUP;
1466 *(uint8_t *)arg = b;
1467 break;
1468 case CHR_IOCTL_PP_DATA_DIR:
1469 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1470 return -ENOTSUP;
1471 break;
1472 case CHR_IOCTL_PP_EPP_READ_ADDR:
1473 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1474 struct ParallelIOArg *parg = arg;
1475 int n = read(fd, parg->buffer, parg->count);
1476 if (n != parg->count) {
1477 return -EIO;
1478 }
1479 }
1480 break;
1481 case CHR_IOCTL_PP_EPP_READ:
1482 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1483 struct ParallelIOArg *parg = arg;
1484 int n = read(fd, parg->buffer, parg->count);
1485 if (n != parg->count) {
1486 return -EIO;
1487 }
1488 }
1489 break;
1490 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1491 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1492 struct ParallelIOArg *parg = arg;
1493 int n = write(fd, parg->buffer, parg->count);
1494 if (n != parg->count) {
1495 return -EIO;
1496 }
1497 }
1498 break;
1499 case CHR_IOCTL_PP_EPP_WRITE:
1500 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1501 struct ParallelIOArg *parg = arg;
1502 int n = write(fd, parg->buffer, parg->count);
1503 if (n != parg->count) {
1504 return -EIO;
1505 }
1506 }
1507 break;
1508 default:
1509 return -ENOTSUP;
1510 }
1511 return 0;
1512 }
1513
1514 static void pp_close(CharDriverState *chr)
1515 {
1516 ParallelCharDriver *drv = chr->opaque;
1517 int fd = drv->fd;
1518
1519 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1520 ioctl(fd, PPRELEASE);
1521 close(fd);
1522 g_free(drv);
1523 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1524 }
1525
1526 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1527 {
1528 CharDriverState *chr;
1529 ParallelCharDriver *drv;
1530
1531 if (ioctl(fd, PPCLAIM) < 0) {
1532 close(fd);
1533 return NULL;
1534 }
1535
1536 drv = g_malloc0(sizeof(ParallelCharDriver));
1537 drv->fd = fd;
1538 drv->mode = IEEE1284_MODE_COMPAT;
1539
1540 chr = g_malloc0(sizeof(CharDriverState));
1541 chr->chr_write = null_chr_write;
1542 chr->chr_ioctl = pp_ioctl;
1543 chr->chr_close = pp_close;
1544 chr->opaque = drv;
1545
1546 return chr;
1547 }
1548 #endif /* __linux__ */
1549
1550 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1551
1552 #define HAVE_CHARDEV_PARPORT 1
1553
1554 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1555 {
1556 int fd = (int)(intptr_t)chr->opaque;
1557 uint8_t b;
1558
1559 switch(cmd) {
1560 case CHR_IOCTL_PP_READ_DATA:
1561 if (ioctl(fd, PPIGDATA, &b) < 0)
1562 return -ENOTSUP;
1563 *(uint8_t *)arg = b;
1564 break;
1565 case CHR_IOCTL_PP_WRITE_DATA:
1566 b = *(uint8_t *)arg;
1567 if (ioctl(fd, PPISDATA, &b) < 0)
1568 return -ENOTSUP;
1569 break;
1570 case CHR_IOCTL_PP_READ_CONTROL:
1571 if (ioctl(fd, PPIGCTRL, &b) < 0)
1572 return -ENOTSUP;
1573 *(uint8_t *)arg = b;
1574 break;
1575 case CHR_IOCTL_PP_WRITE_CONTROL:
1576 b = *(uint8_t *)arg;
1577 if (ioctl(fd, PPISCTRL, &b) < 0)
1578 return -ENOTSUP;
1579 break;
1580 case CHR_IOCTL_PP_READ_STATUS:
1581 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1582 return -ENOTSUP;
1583 *(uint8_t *)arg = b;
1584 break;
1585 default:
1586 return -ENOTSUP;
1587 }
1588 return 0;
1589 }
1590
1591 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1592 {
1593 CharDriverState *chr;
1594
1595 chr = g_malloc0(sizeof(CharDriverState));
1596 chr->opaque = (void *)(intptr_t)fd;
1597 chr->chr_write = null_chr_write;
1598 chr->chr_ioctl = pp_ioctl;
1599 chr->explicit_be_open = true;
1600 return chr;
1601 }
1602 #endif
1603
1604 #else /* _WIN32 */
1605
1606 typedef struct {
1607 int max_size;
1608 HANDLE hcom, hrecv, hsend;
1609 OVERLAPPED orecv, osend;
1610 BOOL fpipe;
1611 DWORD len;
1612 } WinCharState;
1613
1614 typedef struct {
1615 HANDLE hStdIn;
1616 HANDLE hInputReadyEvent;
1617 HANDLE hInputDoneEvent;
1618 HANDLE hInputThread;
1619 uint8_t win_stdio_buf;
1620 } WinStdioCharState;
1621
1622 #define NSENDBUF 2048
1623 #define NRECVBUF 2048
1624 #define MAXCONNECT 1
1625 #define NTIMEOUT 5000
1626
1627 static int win_chr_poll(void *opaque);
1628 static int win_chr_pipe_poll(void *opaque);
1629
1630 static void win_chr_close(CharDriverState *chr)
1631 {
1632 WinCharState *s = chr->opaque;
1633
1634 if (s->hsend) {
1635 CloseHandle(s->hsend);
1636 s->hsend = NULL;
1637 }
1638 if (s->hrecv) {
1639 CloseHandle(s->hrecv);
1640 s->hrecv = NULL;
1641 }
1642 if (s->hcom) {
1643 CloseHandle(s->hcom);
1644 s->hcom = NULL;
1645 }
1646 if (s->fpipe)
1647 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1648 else
1649 qemu_del_polling_cb(win_chr_poll, chr);
1650
1651 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1652 }
1653
1654 static int win_chr_init(CharDriverState *chr, const char *filename)
1655 {
1656 WinCharState *s = chr->opaque;
1657 COMMCONFIG comcfg;
1658 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1659 COMSTAT comstat;
1660 DWORD size;
1661 DWORD err;
1662
1663 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1664 if (!s->hsend) {
1665 fprintf(stderr, "Failed CreateEvent\n");
1666 goto fail;
1667 }
1668 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1669 if (!s->hrecv) {
1670 fprintf(stderr, "Failed CreateEvent\n");
1671 goto fail;
1672 }
1673
1674 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1675 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1676 if (s->hcom == INVALID_HANDLE_VALUE) {
1677 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1678 s->hcom = NULL;
1679 goto fail;
1680 }
1681
1682 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1683 fprintf(stderr, "Failed SetupComm\n");
1684 goto fail;
1685 }
1686
1687 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1688 size = sizeof(COMMCONFIG);
1689 GetDefaultCommConfig(filename, &comcfg, &size);
1690 comcfg.dcb.DCBlength = sizeof(DCB);
1691 CommConfigDialog(filename, NULL, &comcfg);
1692
1693 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1694 fprintf(stderr, "Failed SetCommState\n");
1695 goto fail;
1696 }
1697
1698 if (!SetCommMask(s->hcom, EV_ERR)) {
1699 fprintf(stderr, "Failed SetCommMask\n");
1700 goto fail;
1701 }
1702
1703 cto.ReadIntervalTimeout = MAXDWORD;
1704 if (!SetCommTimeouts(s->hcom, &cto)) {
1705 fprintf(stderr, "Failed SetCommTimeouts\n");
1706 goto fail;
1707 }
1708
1709 if (!ClearCommError(s->hcom, &err, &comstat)) {
1710 fprintf(stderr, "Failed ClearCommError\n");
1711 goto fail;
1712 }
1713 qemu_add_polling_cb(win_chr_poll, chr);
1714 return 0;
1715
1716 fail:
1717 win_chr_close(chr);
1718 return -1;
1719 }
1720
1721 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1722 {
1723 WinCharState *s = chr->opaque;
1724 DWORD len, ret, size, err;
1725
1726 len = len1;
1727 ZeroMemory(&s->osend, sizeof(s->osend));
1728 s->osend.hEvent = s->hsend;
1729 while (len > 0) {
1730 if (s->hsend)
1731 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1732 else
1733 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1734 if (!ret) {
1735 err = GetLastError();
1736 if (err == ERROR_IO_PENDING) {
1737 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1738 if (ret) {
1739 buf += size;
1740 len -= size;
1741 } else {
1742 break;
1743 }
1744 } else {
1745 break;
1746 }
1747 } else {
1748 buf += size;
1749 len -= size;
1750 }
1751 }
1752 return len1 - len;
1753 }
1754
1755 static int win_chr_read_poll(CharDriverState *chr)
1756 {
1757 WinCharState *s = chr->opaque;
1758
1759 s->max_size = qemu_chr_be_can_write(chr);
1760 return s->max_size;
1761 }
1762
1763 static void win_chr_readfile(CharDriverState *chr)
1764 {
1765 WinCharState *s = chr->opaque;
1766 int ret, err;
1767 uint8_t buf[READ_BUF_LEN];
1768 DWORD size;
1769
1770 ZeroMemory(&s->orecv, sizeof(s->orecv));
1771 s->orecv.hEvent = s->hrecv;
1772 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1773 if (!ret) {
1774 err = GetLastError();
1775 if (err == ERROR_IO_PENDING) {
1776 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1777 }
1778 }
1779
1780 if (size > 0) {
1781 qemu_chr_be_write(chr, buf, size);
1782 }
1783 }
1784
1785 static void win_chr_read(CharDriverState *chr)
1786 {
1787 WinCharState *s = chr->opaque;
1788
1789 if (s->len > s->max_size)
1790 s->len = s->max_size;
1791 if (s->len == 0)
1792 return;
1793
1794 win_chr_readfile(chr);
1795 }
1796
1797 static int win_chr_poll(void *opaque)
1798 {
1799 CharDriverState *chr = opaque;
1800 WinCharState *s = chr->opaque;
1801 COMSTAT status;
1802 DWORD comerr;
1803
1804 ClearCommError(s->hcom, &comerr, &status);
1805 if (status.cbInQue > 0) {
1806 s->len = status.cbInQue;
1807 win_chr_read_poll(chr);
1808 win_chr_read(chr);
1809 return 1;
1810 }
1811 return 0;
1812 }
1813
1814 static CharDriverState *qemu_chr_open_win_path(const char *filename)
1815 {
1816 CharDriverState *chr;
1817 WinCharState *s;
1818
1819 chr = g_malloc0(sizeof(CharDriverState));
1820 s = g_malloc0(sizeof(WinCharState));
1821 chr->opaque = s;
1822 chr->chr_write = win_chr_write;
1823 chr->chr_close = win_chr_close;
1824
1825 if (win_chr_init(chr, filename) < 0) {
1826 g_free(s);
1827 g_free(chr);
1828 return NULL;
1829 }
1830 return chr;
1831 }
1832
1833 static int win_chr_pipe_poll(void *opaque)
1834 {
1835 CharDriverState *chr = opaque;
1836 WinCharState *s = chr->opaque;
1837 DWORD size;
1838
1839 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1840 if (size > 0) {
1841 s->len = size;
1842 win_chr_read_poll(chr);
1843 win_chr_read(chr);
1844 return 1;
1845 }
1846 return 0;
1847 }
1848
1849 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1850 {
1851 WinCharState *s = chr->opaque;
1852 OVERLAPPED ov;
1853 int ret;
1854 DWORD size;
1855 char openname[256];
1856
1857 s->fpipe = TRUE;
1858
1859 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1860 if (!s->hsend) {
1861 fprintf(stderr, "Failed CreateEvent\n");
1862 goto fail;
1863 }
1864 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1865 if (!s->hrecv) {
1866 fprintf(stderr, "Failed CreateEvent\n");
1867 goto fail;
1868 }
1869
1870 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1871 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1872 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1873 PIPE_WAIT,
1874 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1875 if (s->hcom == INVALID_HANDLE_VALUE) {
1876 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1877 s->hcom = NULL;
1878 goto fail;
1879 }
1880
1881 ZeroMemory(&ov, sizeof(ov));
1882 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1883 ret = ConnectNamedPipe(s->hcom, &ov);
1884 if (ret) {
1885 fprintf(stderr, "Failed ConnectNamedPipe\n");
1886 goto fail;
1887 }
1888
1889 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1890 if (!ret) {
1891 fprintf(stderr, "Failed GetOverlappedResult\n");
1892 if (ov.hEvent) {
1893 CloseHandle(ov.hEvent);
1894 ov.hEvent = NULL;
1895 }
1896 goto fail;
1897 }
1898
1899 if (ov.hEvent) {
1900 CloseHandle(ov.hEvent);
1901 ov.hEvent = NULL;
1902 }
1903 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1904 return 0;
1905
1906 fail:
1907 win_chr_close(chr);
1908 return -1;
1909 }
1910
1911
1912 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
1913 {
1914 const char *filename = opts->device;
1915 CharDriverState *chr;
1916 WinCharState *s;
1917
1918 chr = g_malloc0(sizeof(CharDriverState));
1919 s = g_malloc0(sizeof(WinCharState));
1920 chr->opaque = s;
1921 chr->chr_write = win_chr_write;
1922 chr->chr_close = win_chr_close;
1923
1924 if (win_chr_pipe_init(chr, filename) < 0) {
1925 g_free(s);
1926 g_free(chr);
1927 return NULL;
1928 }
1929 return chr;
1930 }
1931
1932 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1933 {
1934 CharDriverState *chr;
1935 WinCharState *s;
1936
1937 chr = g_malloc0(sizeof(CharDriverState));
1938 s = g_malloc0(sizeof(WinCharState));
1939 s->hcom = fd_out;
1940 chr->opaque = s;
1941 chr->chr_write = win_chr_write;
1942 return chr;
1943 }
1944
1945 static CharDriverState *qemu_chr_open_win_con(void)
1946 {
1947 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1948 }
1949
1950 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1951 {
1952 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1953 DWORD dwSize;
1954 int len1;
1955
1956 len1 = len;
1957
1958 while (len1 > 0) {
1959 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1960 break;
1961 }
1962 buf += dwSize;
1963 len1 -= dwSize;
1964 }
1965
1966 return len - len1;
1967 }
1968
1969 static void win_stdio_wait_func(void *opaque)
1970 {
1971 CharDriverState *chr = opaque;
1972 WinStdioCharState *stdio = chr->opaque;
1973 INPUT_RECORD buf[4];
1974 int ret;
1975 DWORD dwSize;
1976 int i;
1977
1978 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
1979 &dwSize);
1980
1981 if (!ret) {
1982 /* Avoid error storm */
1983 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
1984 return;
1985 }
1986
1987 for (i = 0; i < dwSize; i++) {
1988 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
1989
1990 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
1991 int j;
1992 if (kev->uChar.AsciiChar != 0) {
1993 for (j = 0; j < kev->wRepeatCount; j++) {
1994 if (qemu_chr_be_can_write(chr)) {
1995 uint8_t c = kev->uChar.AsciiChar;
1996 qemu_chr_be_write(chr, &c, 1);
1997 }
1998 }
1999 }
2000 }
2001 }
2002 }
2003
2004 static DWORD WINAPI win_stdio_thread(LPVOID param)
2005 {
2006 CharDriverState *chr = param;
2007 WinStdioCharState *stdio = chr->opaque;
2008 int ret;
2009 DWORD dwSize;
2010
2011 while (1) {
2012
2013 /* Wait for one byte */
2014 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2015
2016 /* Exit in case of error, continue if nothing read */
2017 if (!ret) {
2018 break;
2019 }
2020 if (!dwSize) {
2021 continue;
2022 }
2023
2024 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2025 if (stdio->win_stdio_buf == '\r') {
2026 continue;
2027 }
2028
2029 /* Signal the main thread and wait until the byte was eaten */
2030 if (!SetEvent(stdio->hInputReadyEvent)) {
2031 break;
2032 }
2033 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2034 != WAIT_OBJECT_0) {
2035 break;
2036 }
2037 }
2038
2039 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2040 return 0;
2041 }
2042
2043 static void win_stdio_thread_wait_func(void *opaque)
2044 {
2045 CharDriverState *chr = opaque;
2046 WinStdioCharState *stdio = chr->opaque;
2047
2048 if (qemu_chr_be_can_write(chr)) {
2049 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2050 }
2051
2052 SetEvent(stdio->hInputDoneEvent);
2053 }
2054
2055 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2056 {
2057 WinStdioCharState *stdio = chr->opaque;
2058 DWORD dwMode = 0;
2059
2060 GetConsoleMode(stdio->hStdIn, &dwMode);
2061
2062 if (echo) {
2063 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2064 } else {
2065 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2066 }
2067 }
2068
2069 static void win_stdio_close(CharDriverState *chr)
2070 {
2071 WinStdioCharState *stdio = chr->opaque;
2072
2073 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2074 CloseHandle(stdio->hInputReadyEvent);
2075 }
2076 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2077 CloseHandle(stdio->hInputDoneEvent);
2078 }
2079 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2080 TerminateThread(stdio->hInputThread, 0);
2081 }
2082
2083 g_free(chr->opaque);
2084 g_free(chr);
2085 }
2086
2087 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
2088 {
2089 CharDriverState *chr;
2090 WinStdioCharState *stdio;
2091 DWORD dwMode;
2092 int is_console = 0;
2093
2094 chr = g_malloc0(sizeof(CharDriverState));
2095 stdio = g_malloc0(sizeof(WinStdioCharState));
2096
2097 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2098 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2099 fprintf(stderr, "cannot open stdio: invalid handle\n");
2100 exit(1);
2101 }
2102
2103 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2104
2105 chr->opaque = stdio;
2106 chr->chr_write = win_stdio_write;
2107 chr->chr_close = win_stdio_close;
2108
2109 if (is_console) {
2110 if (qemu_add_wait_object(stdio->hStdIn,
2111 win_stdio_wait_func, chr)) {
2112 fprintf(stderr, "qemu_add_wait_object: failed\n");
2113 }
2114 } else {
2115 DWORD dwId;
2116
2117 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2118 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2119 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2120 chr, 0, &dwId);
2121
2122 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2123 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2124 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2125 fprintf(stderr, "cannot create stdio thread or event\n");
2126 exit(1);
2127 }
2128 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2129 win_stdio_thread_wait_func, chr)) {
2130 fprintf(stderr, "qemu_add_wait_object: failed\n");
2131 }
2132 }
2133
2134 dwMode |= ENABLE_LINE_INPUT;
2135
2136 if (is_console) {
2137 /* set the terminal in raw mode */
2138 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2139 dwMode |= ENABLE_PROCESSED_INPUT;
2140 }
2141
2142 SetConsoleMode(stdio->hStdIn, dwMode);
2143
2144 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2145 qemu_chr_fe_set_echo(chr, false);
2146
2147 return chr;
2148 }
2149 #endif /* !_WIN32 */
2150
2151
2152 /***********************************************************/
2153 /* UDP Net console */
2154
2155 typedef struct {
2156 int fd;
2157 GIOChannel *chan;
2158 uint8_t buf[READ_BUF_LEN];
2159 int bufcnt;
2160 int bufptr;
2161 int max_size;
2162 } NetCharDriver;
2163
2164 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2165 {
2166 NetCharDriver *s = chr->opaque;
2167 gsize bytes_written;
2168 GIOStatus status;
2169
2170 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2171 if (status == G_IO_STATUS_EOF) {
2172 return 0;
2173 } else if (status != G_IO_STATUS_NORMAL) {
2174 return -1;
2175 }
2176
2177 return bytes_written;
2178 }
2179
2180 static int udp_chr_read_poll(void *opaque)
2181 {
2182 CharDriverState *chr = opaque;
2183 NetCharDriver *s = chr->opaque;
2184
2185 s->max_size = qemu_chr_be_can_write(chr);
2186
2187 /* If there were any stray characters in the queue process them
2188 * first
2189 */
2190 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2191 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2192 s->bufptr++;
2193 s->max_size = qemu_chr_be_can_write(chr);
2194 }
2195 return s->max_size;
2196 }
2197
2198 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2199 {
2200 CharDriverState *chr = opaque;
2201 NetCharDriver *s = chr->opaque;
2202 gsize bytes_read = 0;
2203 GIOStatus status;
2204
2205 if (s->max_size == 0) {
2206 return TRUE;
2207 }
2208 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2209 &bytes_read, NULL);
2210 s->bufcnt = bytes_read;
2211 s->bufptr = s->bufcnt;
2212 if (status != G_IO_STATUS_NORMAL) {
2213 remove_fd_in_watch(chr);
2214 return FALSE;
2215 }
2216
2217 s->bufptr = 0;
2218 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2219 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2220 s->bufptr++;
2221 s->max_size = qemu_chr_be_can_write(chr);
2222 }
2223
2224 return TRUE;
2225 }
2226
2227 static void udp_chr_update_read_handler(CharDriverState *chr)
2228 {
2229 NetCharDriver *s = chr->opaque;
2230
2231 remove_fd_in_watch(chr);
2232 if (s->chan) {
2233 chr->fd_in_tag = io_add_watch_poll(s->chan, udp_chr_read_poll,
2234 udp_chr_read, chr);
2235 }
2236 }
2237
2238 static void udp_chr_close(CharDriverState *chr)
2239 {
2240 NetCharDriver *s = chr->opaque;
2241
2242 remove_fd_in_watch(chr);
2243 if (s->chan) {
2244 g_io_channel_unref(s->chan);
2245 closesocket(s->fd);
2246 }
2247 g_free(s);
2248 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2249 }
2250
2251 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2252 {
2253 CharDriverState *chr = NULL;
2254 NetCharDriver *s = NULL;
2255
2256 chr = g_malloc0(sizeof(CharDriverState));
2257 s = g_malloc0(sizeof(NetCharDriver));
2258
2259 s->fd = fd;
2260 s->chan = io_channel_from_socket(s->fd);
2261 s->bufcnt = 0;
2262 s->bufptr = 0;
2263 chr->opaque = s;
2264 chr->chr_write = udp_chr_write;
2265 chr->chr_update_read_handler = udp_chr_update_read_handler;
2266 chr->chr_close = udp_chr_close;
2267 /* be isn't opened until we get a connection */
2268 chr->explicit_be_open = true;
2269 return chr;
2270 }
2271
2272 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2273 {
2274 Error *local_err = NULL;
2275 int fd = -1;
2276
2277 fd = inet_dgram_opts(opts, &local_err);
2278 if (fd < 0) {
2279 qerror_report_err(local_err);
2280 error_free(local_err);
2281 return NULL;
2282 }
2283 return qemu_chr_open_udp_fd(fd);
2284 }
2285
2286 /***********************************************************/
2287 /* TCP Net console */
2288
2289 typedef struct {
2290
2291 GIOChannel *chan, *listen_chan;
2292 guint listen_tag;
2293 int fd, listen_fd;
2294 int connected;
2295 int max_size;
2296 int do_telnetopt;
2297 int do_nodelay;
2298 int is_unix;
2299 int msgfd;
2300 } TCPCharDriver;
2301
2302 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2303
2304 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2305 {
2306 TCPCharDriver *s = chr->opaque;
2307 if (s->connected) {
2308 return io_channel_send(s->chan, buf, len);
2309 } else {
2310 /* XXX: indicate an error ? */
2311 return len;
2312 }
2313 }
2314
2315 static int tcp_chr_read_poll(void *opaque)
2316 {
2317 CharDriverState *chr = opaque;
2318 TCPCharDriver *s = chr->opaque;
2319 if (!s->connected)
2320 return 0;
2321 s->max_size = qemu_chr_be_can_write(chr);
2322 return s->max_size;
2323 }
2324
2325 #define IAC 255
2326 #define IAC_BREAK 243
2327 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2328 TCPCharDriver *s,
2329 uint8_t *buf, int *size)
2330 {
2331 /* Handle any telnet client's basic IAC options to satisfy char by
2332 * char mode with no echo. All IAC options will be removed from
2333 * the buf and the do_telnetopt variable will be used to track the
2334 * state of the width of the IAC information.
2335 *
2336 * IAC commands come in sets of 3 bytes with the exception of the
2337 * "IAC BREAK" command and the double IAC.
2338 */
2339
2340 int i;
2341 int j = 0;
2342
2343 for (i = 0; i < *size; i++) {
2344 if (s->do_telnetopt > 1) {
2345 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2346 /* Double IAC means send an IAC */
2347 if (j != i)
2348 buf[j] = buf[i];
2349 j++;
2350 s->do_telnetopt = 1;
2351 } else {
2352 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2353 /* Handle IAC break commands by sending a serial break */
2354 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2355 s->do_telnetopt++;
2356 }
2357 s->do_telnetopt++;
2358 }
2359 if (s->do_telnetopt >= 4) {
2360 s->do_telnetopt = 1;
2361 }
2362 } else {
2363 if ((unsigned char)buf[i] == IAC) {
2364 s->do_telnetopt = 2;
2365 } else {
2366 if (j != i)
2367 buf[j] = buf[i];
2368 j++;
2369 }
2370 }
2371 }
2372 *size = j;
2373 }
2374
2375 static int tcp_get_msgfd(CharDriverState *chr)
2376 {
2377 TCPCharDriver *s = chr->opaque;
2378 int fd = s->msgfd;
2379 s->msgfd = -1;
2380 return fd;
2381 }
2382
2383 #ifndef _WIN32
2384 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2385 {
2386 TCPCharDriver *s = chr->opaque;
2387 struct cmsghdr *cmsg;
2388
2389 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2390 int fd;
2391
2392 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2393 cmsg->cmsg_level != SOL_SOCKET ||
2394 cmsg->cmsg_type != SCM_RIGHTS)
2395 continue;
2396
2397 fd = *((int *)CMSG_DATA(cmsg));
2398 if (fd < 0)
2399 continue;
2400
2401 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2402 qemu_set_block(fd);
2403
2404 #ifndef MSG_CMSG_CLOEXEC
2405 qemu_set_cloexec(fd);
2406 #endif
2407 if (s->msgfd != -1)
2408 close(s->msgfd);
2409 s->msgfd = fd;
2410 }
2411 }
2412
2413 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2414 {
2415 TCPCharDriver *s = chr->opaque;
2416 struct msghdr msg = { NULL, };
2417 struct iovec iov[1];
2418 union {
2419 struct cmsghdr cmsg;
2420 char control[CMSG_SPACE(sizeof(int))];
2421 } msg_control;
2422 int flags = 0;
2423 ssize_t ret;
2424
2425 iov[0].iov_base = buf;
2426 iov[0].iov_len = len;
2427
2428 msg.msg_iov = iov;
2429 msg.msg_iovlen = 1;
2430 msg.msg_control = &msg_control;
2431 msg.msg_controllen = sizeof(msg_control);
2432
2433 #ifdef MSG_CMSG_CLOEXEC
2434 flags |= MSG_CMSG_CLOEXEC;
2435 #endif
2436 ret = recvmsg(s->fd, &msg, flags);
2437 if (ret > 0 && s->is_unix) {
2438 unix_process_msgfd(chr, &msg);
2439 }
2440
2441 return ret;
2442 }
2443 #else
2444 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2445 {
2446 TCPCharDriver *s = chr->opaque;
2447 return qemu_recv(s->fd, buf, len, 0);
2448 }
2449 #endif
2450
2451 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2452 {
2453 TCPCharDriver *s = chr->opaque;
2454 return g_io_create_watch(s->chan, cond);
2455 }
2456
2457 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2458 {
2459 CharDriverState *chr = opaque;
2460 TCPCharDriver *s = chr->opaque;
2461 uint8_t buf[READ_BUF_LEN];
2462 int len, size;
2463
2464 if (!s->connected || s->max_size <= 0) {
2465 return TRUE;
2466 }
2467 len = sizeof(buf);
2468 if (len > s->max_size)
2469 len = s->max_size;
2470 size = tcp_chr_recv(chr, (void *)buf, len);
2471 if (size == 0) {
2472 /* connection closed */
2473 s->connected = 0;
2474 if (s->listen_chan) {
2475 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2476 }
2477 remove_fd_in_watch(chr);
2478 g_io_channel_unref(s->chan);
2479 s->chan = NULL;
2480 closesocket(s->fd);
2481 s->fd = -1;
2482 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2483 } else if (size > 0) {
2484 if (s->do_telnetopt)
2485 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2486 if (size > 0)
2487 qemu_chr_be_write(chr, buf, size);
2488 }
2489
2490 return TRUE;
2491 }
2492
2493 #ifndef _WIN32
2494 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2495 {
2496 return qemu_chr_open_fd(eventfd, eventfd);
2497 }
2498 #endif
2499
2500 static void tcp_chr_connect(void *opaque)
2501 {
2502 CharDriverState *chr = opaque;
2503 TCPCharDriver *s = chr->opaque;
2504
2505 s->connected = 1;
2506 if (s->chan) {
2507 chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
2508 tcp_chr_read, chr);
2509 }
2510 qemu_chr_be_generic_open(chr);
2511 }
2512
2513 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2514 static void tcp_chr_telnet_init(int fd)
2515 {
2516 char buf[3];
2517 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2518 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2519 send(fd, (char *)buf, 3, 0);
2520 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2521 send(fd, (char *)buf, 3, 0);
2522 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2523 send(fd, (char *)buf, 3, 0);
2524 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2525 send(fd, (char *)buf, 3, 0);
2526 }
2527
2528 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2529 {
2530 TCPCharDriver *s = chr->opaque;
2531 if (s->fd != -1)
2532 return -1;
2533
2534 qemu_set_nonblock(fd);
2535 if (s->do_nodelay)
2536 socket_set_nodelay(fd);
2537 s->fd = fd;
2538 s->chan = io_channel_from_socket(fd);
2539 if (s->listen_tag) {
2540 g_source_remove(s->listen_tag);
2541 s->listen_tag = 0;
2542 }
2543 tcp_chr_connect(chr);
2544
2545 return 0;
2546 }
2547
2548 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
2549 {
2550 CharDriverState *chr = opaque;
2551 TCPCharDriver *s = chr->opaque;
2552 struct sockaddr_in saddr;
2553 #ifndef _WIN32
2554 struct sockaddr_un uaddr;
2555 #endif
2556 struct sockaddr *addr;
2557 socklen_t len;
2558 int fd;
2559
2560 for(;;) {
2561 #ifndef _WIN32
2562 if (s->is_unix) {
2563 len = sizeof(uaddr);
2564 addr = (struct sockaddr *)&uaddr;
2565 } else
2566 #endif
2567 {
2568 len = sizeof(saddr);
2569 addr = (struct sockaddr *)&saddr;
2570 }
2571 fd = qemu_accept(s->listen_fd, addr, &len);
2572 if (fd < 0 && errno != EINTR) {
2573 s->listen_tag = 0;
2574 return FALSE;
2575 } else if (fd >= 0) {
2576 if (s->do_telnetopt)
2577 tcp_chr_telnet_init(fd);
2578 break;
2579 }
2580 }
2581 if (tcp_chr_add_client(chr, fd) < 0)
2582 close(fd);
2583
2584 return TRUE;
2585 }
2586
2587 static void tcp_chr_close(CharDriverState *chr)
2588 {
2589 TCPCharDriver *s = chr->opaque;
2590 if (s->fd >= 0) {
2591 remove_fd_in_watch(chr);
2592 if (s->chan) {
2593 g_io_channel_unref(s->chan);
2594 }
2595 closesocket(s->fd);
2596 }
2597 if (s->listen_fd >= 0) {
2598 if (s->listen_tag) {
2599 g_source_remove(s->listen_tag);
2600 s->listen_tag = 0;
2601 }
2602 if (s->listen_chan) {
2603 g_io_channel_unref(s->listen_chan);
2604 }
2605 closesocket(s->listen_fd);
2606 }
2607 g_free(s);
2608 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2609 }
2610
2611 static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
2612 bool is_listen, bool is_telnet,
2613 bool is_waitconnect,
2614 Error **errp)
2615 {
2616 CharDriverState *chr = NULL;
2617 TCPCharDriver *s = NULL;
2618 char host[NI_MAXHOST], serv[NI_MAXSERV];
2619 const char *left = "", *right = "";
2620 struct sockaddr_storage ss;
2621 socklen_t ss_len = sizeof(ss);
2622
2623 memset(&ss, 0, ss_len);
2624 if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2625 error_setg_errno(errp, errno, "getsockname");
2626 return NULL;
2627 }
2628
2629 chr = g_malloc0(sizeof(CharDriverState));
2630 s = g_malloc0(sizeof(TCPCharDriver));
2631
2632 s->connected = 0;
2633 s->fd = -1;
2634 s->listen_fd = -1;
2635 s->msgfd = -1;
2636
2637 chr->filename = g_malloc(256);
2638 switch (ss.ss_family) {
2639 #ifndef _WIN32
2640 case AF_UNIX:
2641 s->is_unix = 1;
2642 snprintf(chr->filename, 256, "unix:%s%s",
2643 ((struct sockaddr_un *)(&ss))->sun_path,
2644 is_listen ? ",server" : "");
2645 break;
2646 #endif
2647 case AF_INET6:
2648 left = "[";
2649 right = "]";
2650 /* fall through */
2651 case AF_INET:
2652 s->do_nodelay = do_nodelay;
2653 getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
2654 serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
2655 snprintf(chr->filename, 256, "%s:%s%s%s:%s%s",
2656 is_telnet ? "telnet" : "tcp",
2657 left, host, right, serv,
2658 is_listen ? ",server" : "");
2659 break;
2660 }
2661
2662 chr->opaque = s;
2663 chr->chr_write = tcp_chr_write;
2664 chr->chr_close = tcp_chr_close;
2665 chr->get_msgfd = tcp_get_msgfd;
2666 chr->chr_add_client = tcp_chr_add_client;
2667 chr->chr_add_watch = tcp_chr_add_watch;
2668 /* be isn't opened until we get a connection */
2669 chr->explicit_be_open = true;
2670
2671 if (is_listen) {
2672 s->listen_fd = fd;
2673 s->listen_chan = io_channel_from_socket(s->listen_fd);
2674 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
2675 if (is_telnet) {
2676 s->do_telnetopt = 1;
2677 }
2678 } else {
2679 s->connected = 1;
2680 s->fd = fd;
2681 socket_set_nodelay(fd);
2682 s->chan = io_channel_from_socket(s->fd);
2683 tcp_chr_connect(chr);
2684 }
2685
2686 if (is_listen && is_waitconnect) {
2687 fprintf(stderr, "QEMU waiting for connection on: %s\n",
2688 chr->filename);
2689 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
2690 qemu_set_nonblock(s->listen_fd);
2691 }
2692 return chr;
2693 }
2694
2695 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2696 {
2697 CharDriverState *chr = NULL;
2698 Error *local_err = NULL;
2699 int fd = -1;
2700
2701 bool is_listen = qemu_opt_get_bool(opts, "server", false);
2702 bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true);
2703 bool is_telnet = qemu_opt_get_bool(opts, "telnet", false);
2704 bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true);
2705 bool is_unix = qemu_opt_get(opts, "path") != NULL;
2706
2707 if (is_unix) {
2708 if (is_listen) {
2709 fd = unix_listen_opts(opts, &local_err);
2710 } else {
2711 fd = unix_connect_opts(opts, &local_err, NULL, NULL);
2712 }
2713 } else {
2714 if (is_listen) {
2715 fd = inet_listen_opts(opts, 0, &local_err);
2716 } else {
2717 fd = inet_connect_opts(opts, &local_err, NULL, NULL);
2718 }
2719 }
2720 if (fd < 0) {
2721 goto fail;
2722 }
2723
2724 if (!is_waitconnect)
2725 qemu_set_nonblock(fd);
2726
2727 chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet,
2728 is_waitconnect, &local_err);
2729 if (error_is_set(&local_err)) {
2730 goto fail;
2731 }
2732 return chr;
2733
2734
2735 fail:
2736 if (local_err) {
2737 qerror_report_err(local_err);
2738 error_free(local_err);
2739 }
2740 if (fd >= 0) {
2741 closesocket(fd);
2742 }
2743 if (chr) {
2744 g_free(chr->opaque);
2745 g_free(chr);
2746 }
2747 return NULL;
2748 }
2749
2750 /*********************************************************/
2751 /* Ring buffer chardev */
2752
2753 typedef struct {
2754 size_t size;
2755 size_t prod;
2756 size_t cons;
2757 uint8_t *cbuf;
2758 } RingBufCharDriver;
2759
2760 static size_t ringbuf_count(const CharDriverState *chr)
2761 {
2762 const RingBufCharDriver *d = chr->opaque;
2763
2764 return d->prod - d->cons;
2765 }
2766
2767 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2768 {
2769 RingBufCharDriver *d = chr->opaque;
2770 int i;
2771
2772 if (!buf || (len < 0)) {
2773 return -1;
2774 }
2775
2776 for (i = 0; i < len; i++ ) {
2777 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
2778 if (d->prod - d->cons > d->size) {
2779 d->cons = d->prod - d->size;
2780 }
2781 }
2782
2783 return 0;
2784 }
2785
2786 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
2787 {
2788 RingBufCharDriver *d = chr->opaque;
2789 int i;
2790
2791 for (i = 0; i < len && d->cons != d->prod; i++) {
2792 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
2793 }
2794
2795 return i;
2796 }
2797
2798 static void ringbuf_chr_close(struct CharDriverState *chr)
2799 {
2800 RingBufCharDriver *d = chr->opaque;
2801
2802 g_free(d->cbuf);
2803 g_free(d);
2804 chr->opaque = NULL;
2805 }
2806
2807 static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts,
2808 Error **errp)
2809 {
2810 CharDriverState *chr;
2811 RingBufCharDriver *d;
2812
2813 chr = g_malloc0(sizeof(CharDriverState));
2814 d = g_malloc(sizeof(*d));
2815
2816 d->size = opts->has_size ? opts->size : 65536;
2817
2818 /* The size must be power of 2 */
2819 if (d->size & (d->size - 1)) {
2820 error_setg(errp, "size of ringbuf chardev must be power of two");
2821 goto fail;
2822 }
2823
2824 d->prod = 0;
2825 d->cons = 0;
2826 d->cbuf = g_malloc0(d->size);
2827
2828 chr->opaque = d;
2829 chr->chr_write = ringbuf_chr_write;
2830 chr->chr_close = ringbuf_chr_close;
2831
2832 return chr;
2833
2834 fail:
2835 g_free(d);
2836 g_free(chr);
2837 return NULL;
2838 }
2839
2840 static bool chr_is_ringbuf(const CharDriverState *chr)
2841 {
2842 return chr->chr_write == ringbuf_chr_write;
2843 }
2844
2845 void qmp_ringbuf_write(const char *device, const char *data,
2846 bool has_format, enum DataFormat format,
2847 Error **errp)
2848 {
2849 CharDriverState *chr;
2850 const uint8_t *write_data;
2851 int ret;
2852 gsize write_count;
2853
2854 chr = qemu_chr_find(device);
2855 if (!chr) {
2856 error_setg(errp, "Device '%s' not found", device);
2857 return;
2858 }
2859
2860 if (!chr_is_ringbuf(chr)) {
2861 error_setg(errp,"%s is not a ringbuf device", device);
2862 return;
2863 }
2864
2865 if (has_format && (format == DATA_FORMAT_BASE64)) {
2866 write_data = g_base64_decode(data, &write_count);
2867 } else {
2868 write_data = (uint8_t *)data;
2869 write_count = strlen(data);
2870 }
2871
2872 ret = ringbuf_chr_write(chr, write_data, write_count);
2873
2874 if (write_data != (uint8_t *)data) {
2875 g_free((void *)write_data);
2876 }
2877
2878 if (ret < 0) {
2879 error_setg(errp, "Failed to write to device %s", device);
2880 return;
2881 }
2882 }
2883
2884 char *qmp_ringbuf_read(const char *device, int64_t size,
2885 bool has_format, enum DataFormat format,
2886 Error **errp)
2887 {
2888 CharDriverState *chr;
2889 uint8_t *read_data;
2890 size_t count;
2891 char *data;
2892
2893 chr = qemu_chr_find(device);
2894 if (!chr) {
2895 error_setg(errp, "Device '%s' not found", device);
2896 return NULL;
2897 }
2898
2899 if (!chr_is_ringbuf(chr)) {
2900 error_setg(errp,"%s is not a ringbuf device", device);
2901 return NULL;
2902 }
2903
2904 if (size <= 0) {
2905 error_setg(errp, "size must be greater than zero");
2906 return NULL;
2907 }
2908
2909 count = ringbuf_count(chr);
2910 size = size > count ? count : size;
2911 read_data = g_malloc(size + 1);
2912
2913 ringbuf_chr_read(chr, read_data, size);
2914
2915 if (has_format && (format == DATA_FORMAT_BASE64)) {
2916 data = g_base64_encode(read_data, size);
2917 g_free(read_data);
2918 } else {
2919 /*
2920 * FIXME should read only complete, valid UTF-8 characters up
2921 * to @size bytes. Invalid sequences should be replaced by a
2922 * suitable replacement character. Except when (and only
2923 * when) ring buffer lost characters since last read, initial
2924 * continuation characters should be dropped.
2925 */
2926 read_data[size] = 0;
2927 data = (char *)read_data;
2928 }
2929
2930 return data;
2931 }
2932
2933 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2934 {
2935 char host[65], port[33], width[8], height[8];
2936 int pos;
2937 const char *p;
2938 QemuOpts *opts;
2939 Error *local_err = NULL;
2940
2941 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
2942 if (error_is_set(&local_err)) {
2943 qerror_report_err(local_err);
2944 error_free(local_err);
2945 return NULL;
2946 }
2947
2948 if (strstart(filename, "mon:", &p)) {
2949 filename = p;
2950 qemu_opt_set(opts, "mux", "on");
2951 if (strcmp(filename, "stdio") == 0) {
2952 /* Monitor is muxed to stdio: do not exit on Ctrl+C by default
2953 * but pass it to the guest. Handle this only for compat syntax,
2954 * for -chardev syntax we have special option for this.
2955 * This is what -nographic did, redirecting+muxing serial+monitor
2956 * to stdio causing Ctrl+C to be passed to guest. */
2957 qemu_opt_set(opts, "signal", "off");
2958 }
2959 }
2960
2961 if (strcmp(filename, "null") == 0 ||
2962 strcmp(filename, "pty") == 0 ||
2963 strcmp(filename, "msmouse") == 0 ||
2964 strcmp(filename, "braille") == 0 ||
2965 strcmp(filename, "stdio") == 0) {
2966 qemu_opt_set(opts, "backend", filename);
2967 return opts;
2968 }
2969 if (strstart(filename, "vc", &p)) {
2970 qemu_opt_set(opts, "backend", "vc");
2971 if (*p == ':') {
2972 if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
2973 /* pixels */
2974 qemu_opt_set(opts, "width", width);
2975 qemu_opt_set(opts, "height", height);
2976 } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
2977 /* chars */
2978 qemu_opt_set(opts, "cols", width);
2979 qemu_opt_set(opts, "rows", height);
2980 } else {
2981 goto fail;
2982 }
2983 }
2984 return opts;
2985 }
2986 if (strcmp(filename, "con:") == 0) {
2987 qemu_opt_set(opts, "backend", "console");
2988 return opts;
2989 }
2990 if (strstart(filename, "COM", NULL)) {
2991 qemu_opt_set(opts, "backend", "serial");
2992 qemu_opt_set(opts, "path", filename);
2993 return opts;
2994 }
2995 if (strstart(filename, "file:", &p)) {
2996 qemu_opt_set(opts, "backend", "file");
2997 qemu_opt_set(opts, "path", p);
2998 return opts;
2999 }
3000 if (strstart(filename, "pipe:", &p)) {
3001 qemu_opt_set(opts, "backend", "pipe");
3002 qemu_opt_set(opts, "path", p);
3003 return opts;
3004 }
3005 if (strstart(filename, "tcp:", &p) ||
3006 strstart(filename, "telnet:", &p)) {
3007 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3008 host[0] = 0;
3009 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3010 goto fail;
3011 }
3012 qemu_opt_set(opts, "backend", "socket");
3013 qemu_opt_set(opts, "host", host);
3014 qemu_opt_set(opts, "port", port);
3015 if (p[pos] == ',') {
3016 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
3017 goto fail;
3018 }
3019 if (strstart(filename, "telnet:", &p))
3020 qemu_opt_set(opts, "telnet", "on");
3021 return opts;
3022 }
3023 if (strstart(filename, "udp:", &p)) {
3024 qemu_opt_set(opts, "backend", "udp");
3025 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3026 host[0] = 0;
3027 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3028 goto fail;
3029 }
3030 }
3031 qemu_opt_set(opts, "host", host);
3032 qemu_opt_set(opts, "port", port);
3033 if (p[pos] == '@') {
3034 p += pos + 1;
3035 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3036 host[0] = 0;
3037 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3038 goto fail;
3039 }
3040 }
3041 qemu_opt_set(opts, "localaddr", host);
3042 qemu_opt_set(opts, "localport", port);
3043 }
3044 return opts;
3045 }
3046 if (strstart(filename, "unix:", &p)) {
3047 qemu_opt_set(opts, "backend", "socket");
3048 if (qemu_opts_do_parse(opts, p, "path") != 0)
3049 goto fail;
3050 return opts;
3051 }
3052 if (strstart(filename, "/dev/parport", NULL) ||
3053 strstart(filename, "/dev/ppi", NULL)) {
3054 qemu_opt_set(opts, "backend", "parport");
3055 qemu_opt_set(opts, "path", filename);
3056 return opts;
3057 }
3058 if (strstart(filename, "/dev/", NULL)) {
3059 qemu_opt_set(opts, "backend", "tty");
3060 qemu_opt_set(opts, "path", filename);
3061 return opts;
3062 }
3063
3064 fail:
3065 qemu_opts_del(opts);
3066 return NULL;
3067 }
3068
3069 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3070 Error **errp)
3071 {
3072 const char *path = qemu_opt_get(opts, "path");
3073
3074 if (path == NULL) {
3075 error_setg(errp, "chardev: file: no filename given");
3076 return;
3077 }
3078 backend->file = g_new0(ChardevFile, 1);
3079 backend->file->out = g_strdup(path);
3080 }
3081
3082 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3083 Error **errp)
3084 {
3085 backend->stdio = g_new0(ChardevStdio, 1);
3086 backend->stdio->has_signal = true;
3087 backend->stdio->signal = qemu_opt_get_bool(opts, "signal", true);
3088 }
3089
3090 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3091 Error **errp)
3092 {
3093 const char *device = qemu_opt_get(opts, "path");
3094
3095 if (device == NULL) {
3096 error_setg(errp, "chardev: serial/tty: no device path given");
3097 return;
3098 }
3099 backend->serial = g_new0(ChardevHostdev, 1);
3100 backend->serial->device = g_strdup(device);
3101 }
3102
3103 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3104 Error **errp)
3105 {
3106 const char *device = qemu_opt_get(opts, "path");
3107
3108 if (device == NULL) {
3109 error_setg(errp, "chardev: parallel: no device path given");
3110 return;
3111 }
3112 backend->parallel = g_new0(ChardevHostdev, 1);
3113 backend->parallel->device = g_strdup(device);
3114 }
3115
3116 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3117 Error **errp)
3118 {
3119 const char *device = qemu_opt_get(opts, "path");
3120
3121 if (device == NULL) {
3122 error_setg(errp, "chardev: pipe: no device path given");
3123 return;
3124 }
3125 backend->pipe = g_new0(ChardevHostdev, 1);
3126 backend->pipe->device = g_strdup(device);
3127 }
3128
3129 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3130 Error **errp)
3131 {
3132 int val;
3133
3134 backend->ringbuf = g_new0(ChardevRingbuf, 1);
3135
3136 val = qemu_opt_get_size(opts, "size", 0);
3137 if (val != 0) {
3138 backend->ringbuf->has_size = true;
3139 backend->ringbuf->size = val;
3140 }
3141 }
3142
3143 static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
3144 Error **errp)
3145 {
3146 const char *chardev = qemu_opt_get(opts, "chardev");
3147
3148 if (chardev == NULL) {
3149 error_setg(errp, "chardev: mux: no chardev given");
3150 return;
3151 }
3152 backend->mux = g_new0(ChardevMux, 1);
3153 backend->mux->chardev = g_strdup(chardev);
3154 }
3155
3156 typedef struct CharDriver {
3157 const char *name;
3158 /* old, pre qapi */
3159 CharDriverState *(*open)(QemuOpts *opts);
3160 /* new, qapi-based */
3161 ChardevBackendKind kind;
3162 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3163 } CharDriver;
3164
3165 static GSList *backends;
3166
3167 void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *))
3168 {
3169 CharDriver *s;
3170
3171 s = g_malloc0(sizeof(*s));
3172 s->name = g_strdup(name);
3173 s->open = open;
3174
3175 backends = g_slist_append(backends, s);
3176 }
3177
3178 void register_char_driver_qapi(const char *name, ChardevBackendKind kind,
3179 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp))
3180 {
3181 CharDriver *s;
3182
3183 s = g_malloc0(sizeof(*s));
3184 s->name = g_strdup(name);
3185 s->kind = kind;
3186 s->parse = parse;
3187
3188 backends = g_slist_append(backends, s);
3189 }
3190
3191 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3192 void (*init)(struct CharDriverState *s),
3193 Error **errp)
3194 {
3195 CharDriver *cd;
3196 CharDriverState *chr;
3197 GSList *i;
3198
3199 if (qemu_opts_id(opts) == NULL) {
3200 error_setg(errp, "chardev: no id specified");
3201 goto err;
3202 }
3203
3204 if (qemu_opt_get(opts, "backend") == NULL) {
3205 error_setg(errp, "chardev: \"%s\" missing backend",
3206 qemu_opts_id(opts));
3207 goto err;
3208 }
3209 for (i = backends; i; i = i->next) {
3210 cd = i->data;
3211
3212 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3213 break;
3214 }
3215 }
3216 if (i == NULL) {
3217 error_setg(errp, "chardev: backend \"%s\" not found",
3218 qemu_opt_get(opts, "backend"));
3219 goto err;
3220 }
3221
3222 if (!cd->open) {
3223 /* using new, qapi init */
3224 ChardevBackend *backend = g_new0(ChardevBackend, 1);
3225 ChardevReturn *ret = NULL;
3226 const char *id = qemu_opts_id(opts);
3227 char *bid = NULL;
3228
3229 if (qemu_opt_get_bool(opts, "mux", 0)) {
3230 bid = g_strdup_printf("%s-base", id);
3231 }
3232
3233 chr = NULL;
3234 backend->kind = cd->kind;
3235 if (cd->parse) {
3236 cd->parse(opts, backend, errp);
3237 if (error_is_set(errp)) {
3238 goto qapi_out;
3239 }
3240 }
3241 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3242 if (error_is_set(errp)) {
3243 goto qapi_out;
3244 }
3245
3246 if (bid) {
3247 qapi_free_ChardevBackend(backend);
3248 qapi_free_ChardevReturn(ret);
3249 backend = g_new0(ChardevBackend, 1);
3250 backend->mux = g_new0(ChardevMux, 1);
3251 backend->kind = CHARDEV_BACKEND_KIND_MUX;
3252 backend->mux->chardev = g_strdup(bid);
3253 ret = qmp_chardev_add(id, backend, errp);
3254 if (error_is_set(errp)) {
3255 chr = qemu_chr_find(bid);
3256 qemu_chr_delete(chr);
3257 chr = NULL;
3258 goto qapi_out;
3259 }
3260 }
3261
3262 chr = qemu_chr_find(id);
3263 chr->opts = opts;
3264
3265 qapi_out:
3266 qapi_free_ChardevBackend(backend);
3267 qapi_free_ChardevReturn(ret);
3268 g_free(bid);
3269 return chr;
3270 }
3271
3272 chr = cd->open(opts);
3273 if (!chr) {
3274 error_setg(errp, "chardev: opening backend \"%s\" failed",
3275 qemu_opt_get(opts, "backend"));
3276 goto err;
3277 }
3278
3279 if (!chr->filename)
3280 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
3281 chr->init = init;
3282 /* if we didn't create the chardev via qmp_chardev_add, we
3283 * need to send the OPENED event here
3284 */
3285 if (!chr->explicit_be_open) {
3286 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
3287 }
3288 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3289
3290 if (qemu_opt_get_bool(opts, "mux", 0)) {
3291 CharDriverState *base = chr;
3292 int len = strlen(qemu_opts_id(opts)) + 6;
3293 base->label = g_malloc(len);
3294 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
3295 chr = qemu_chr_open_mux(base);
3296 chr->filename = base->filename;
3297 chr->avail_connections = MAX_MUX;
3298 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3299 } else {
3300 chr->avail_connections = 1;
3301 }
3302 chr->label = g_strdup(qemu_opts_id(opts));
3303 chr->opts = opts;
3304 return chr;
3305
3306 err:
3307 qemu_opts_del(opts);
3308 return NULL;
3309 }
3310
3311 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3312 {
3313 const char *p;
3314 CharDriverState *chr;
3315 QemuOpts *opts;
3316 Error *err = NULL;
3317
3318 if (strstart(filename, "chardev:", &p)) {
3319 return qemu_chr_find(p);
3320 }
3321
3322 opts = qemu_chr_parse_compat(label, filename);
3323 if (!opts)
3324 return NULL;
3325
3326 chr = qemu_chr_new_from_opts(opts, init, &err);
3327 if (error_is_set(&err)) {
3328 error_report("%s", error_get_pretty(err));
3329 error_free(err);
3330 }
3331 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3332 qemu_chr_fe_claim_no_fail(chr);
3333 monitor_init(chr, MONITOR_USE_READLINE);
3334 }
3335 return chr;
3336 }
3337
3338 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3339 {
3340 if (chr->chr_set_echo) {
3341 chr->chr_set_echo(chr, echo);
3342 }
3343 }
3344
3345 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
3346 {
3347 if (chr->fe_open == fe_open) {
3348 return;
3349 }
3350 chr->fe_open = fe_open;
3351 if (chr->chr_set_fe_open) {
3352 chr->chr_set_fe_open(chr, fe_open);
3353 }
3354 }
3355
3356 int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3357 GIOFunc func, void *user_data)
3358 {
3359 GSource *src;
3360 guint tag;
3361
3362 if (s->chr_add_watch == NULL) {
3363 return -ENOSYS;
3364 }
3365
3366 src = s->chr_add_watch(s, cond);
3367 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3368 tag = g_source_attach(src, NULL);
3369 g_source_unref(src);
3370
3371 return tag;
3372 }
3373
3374 int qemu_chr_fe_claim(CharDriverState *s)
3375 {
3376 if (s->avail_connections < 1) {
3377 return -1;
3378 }
3379 s->avail_connections--;
3380 return 0;
3381 }
3382
3383 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
3384 {
3385 if (qemu_chr_fe_claim(s) != 0) {
3386 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
3387 __func__, s->label);
3388 exit(1);
3389 }
3390 }
3391
3392 void qemu_chr_fe_release(CharDriverState *s)
3393 {
3394 s->avail_connections++;
3395 }
3396
3397 void qemu_chr_delete(CharDriverState *chr)
3398 {
3399 QTAILQ_REMOVE(&chardevs, chr, next);
3400 if (chr->chr_close) {
3401 chr->chr_close(chr);
3402 }
3403 g_free(chr->filename);
3404 g_free(chr->label);
3405 if (chr->opts) {
3406 qemu_opts_del(chr->opts);
3407 }
3408 g_free(chr);
3409 }
3410
3411 ChardevInfoList *qmp_query_chardev(Error **errp)
3412 {
3413 ChardevInfoList *chr_list = NULL;
3414 CharDriverState *chr;
3415
3416 QTAILQ_FOREACH(chr, &chardevs, next) {
3417 ChardevInfoList *info = g_malloc0(sizeof(*info));
3418 info->value = g_malloc0(sizeof(*info->value));
3419 info->value->label = g_strdup(chr->label);
3420 info->value->filename = g_strdup(chr->filename);
3421
3422 info->next = chr_list;
3423 chr_list = info;
3424 }
3425
3426 return chr_list;
3427 }
3428
3429 CharDriverState *qemu_chr_find(const char *name)
3430 {
3431 CharDriverState *chr;
3432
3433 QTAILQ_FOREACH(chr, &chardevs, next) {
3434 if (strcmp(chr->label, name) != 0)
3435 continue;
3436 return chr;
3437 }
3438 return NULL;
3439 }
3440
3441 /* Get a character (serial) device interface. */
3442 CharDriverState *qemu_char_get_next_serial(void)
3443 {
3444 static int next_serial;
3445 CharDriverState *chr;
3446
3447 /* FIXME: This function needs to go away: use chardev properties! */
3448
3449 while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
3450 chr = serial_hds[next_serial++];
3451 qemu_chr_fe_claim_no_fail(chr);
3452 return chr;
3453 }
3454 return NULL;
3455 }
3456
3457 QemuOptsList qemu_chardev_opts = {
3458 .name = "chardev",
3459 .implied_opt_name = "backend",
3460 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3461 .desc = {
3462 {
3463 .name = "backend",
3464 .type = QEMU_OPT_STRING,
3465 },{
3466 .name = "path",
3467 .type = QEMU_OPT_STRING,
3468 },{
3469 .name = "host",
3470 .type = QEMU_OPT_STRING,
3471 },{
3472 .name = "port",
3473 .type = QEMU_OPT_STRING,
3474 },{
3475 .name = "localaddr",
3476 .type = QEMU_OPT_STRING,
3477 },{
3478 .name = "localport",
3479 .type = QEMU_OPT_STRING,
3480 },{
3481 .name = "to",
3482 .type = QEMU_OPT_NUMBER,
3483 },{
3484 .name = "ipv4",
3485 .type = QEMU_OPT_BOOL,
3486 },{
3487 .name = "ipv6",
3488 .type = QEMU_OPT_BOOL,
3489 },{
3490 .name = "wait",
3491 .type = QEMU_OPT_BOOL,
3492 },{
3493 .name = "server",
3494 .type = QEMU_OPT_BOOL,
3495 },{
3496 .name = "delay",
3497 .type = QEMU_OPT_BOOL,
3498 },{
3499 .name = "telnet",
3500 .type = QEMU_OPT_BOOL,
3501 },{
3502 .name = "width",
3503 .type = QEMU_OPT_NUMBER,
3504 },{
3505 .name = "height",
3506 .type = QEMU_OPT_NUMBER,
3507 },{
3508 .name = "cols",
3509 .type = QEMU_OPT_NUMBER,
3510 },{
3511 .name = "rows",
3512 .type = QEMU_OPT_NUMBER,
3513 },{
3514 .name = "mux",
3515 .type = QEMU_OPT_BOOL,
3516 },{
3517 .name = "signal",
3518 .type = QEMU_OPT_BOOL,
3519 },{
3520 .name = "name",
3521 .type = QEMU_OPT_STRING,
3522 },{
3523 .name = "debug",
3524 .type = QEMU_OPT_NUMBER,
3525 },{
3526 .name = "size",
3527 .type = QEMU_OPT_SIZE,
3528 },{
3529 .name = "chardev",
3530 .type = QEMU_OPT_STRING,
3531 },
3532 { /* end of list */ }
3533 },
3534 };
3535
3536 #ifdef _WIN32
3537
3538 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3539 {
3540 HANDLE out;
3541
3542 if (file->has_in) {
3543 error_setg(errp, "input file not supported");
3544 return NULL;
3545 }
3546
3547 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
3548 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
3549 if (out == INVALID_HANDLE_VALUE) {
3550 error_setg(errp, "open %s failed", file->out);
3551 return NULL;
3552 }
3553 return qemu_chr_open_win_file(out);
3554 }
3555
3556 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3557 Error **errp)
3558 {
3559 return qemu_chr_open_win_path(serial->device);
3560 }
3561
3562 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3563 Error **errp)
3564 {
3565 error_setg(errp, "character device backend type 'parallel' not supported");
3566 return NULL;
3567 }
3568
3569 #else /* WIN32 */
3570
3571 static int qmp_chardev_open_file_source(char *src, int flags,
3572 Error **errp)
3573 {
3574 int fd = -1;
3575
3576 TFR(fd = qemu_open(src, flags, 0666));
3577 if (fd == -1) {
3578 error_setg_file_open(errp, errno, src);
3579 }
3580 return fd;
3581 }
3582
3583 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
3584 {
3585 int flags, in = -1, out = -1;
3586
3587 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
3588 out = qmp_chardev_open_file_source(file->out, flags, errp);
3589 if (error_is_set(errp)) {
3590 return NULL;
3591 }
3592
3593 if (file->has_in) {
3594 flags = O_RDONLY;
3595 in = qmp_chardev_open_file_source(file->in, flags, errp);
3596 if (error_is_set(errp)) {
3597 qemu_close(out);
3598 return NULL;
3599 }
3600 }
3601
3602 return qemu_chr_open_fd(in, out);
3603 }
3604
3605 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
3606 Error **errp)
3607 {
3608 #ifdef HAVE_CHARDEV_TTY
3609 int fd;
3610
3611 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
3612 if (error_is_set(errp)) {
3613 return NULL;
3614 }
3615 qemu_set_nonblock(fd);
3616 return qemu_chr_open_tty_fd(fd);
3617 #else
3618 error_setg(errp, "character device backend type 'serial' not supported");
3619 return NULL;
3620 #endif
3621 }
3622
3623 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
3624 Error **errp)
3625 {
3626 #ifdef HAVE_CHARDEV_PARPORT
3627 int fd;
3628
3629 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
3630 if (error_is_set(errp)) {
3631 return NULL;
3632 }
3633 return qemu_chr_open_pp_fd(fd);
3634 #else
3635 error_setg(errp, "character device backend type 'parallel' not supported");
3636 return NULL;
3637 #endif
3638 }
3639
3640 #endif /* WIN32 */
3641
3642 static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
3643 Error **errp)
3644 {
3645 SocketAddress *addr = sock->addr;
3646 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
3647 bool is_listen = sock->has_server ? sock->server : true;
3648 bool is_telnet = sock->has_telnet ? sock->telnet : false;
3649 bool is_waitconnect = sock->has_wait ? sock->wait : false;
3650 int fd;
3651
3652 if (is_listen) {
3653 fd = socket_listen(addr, errp);
3654 } else {
3655 fd = socket_connect(addr, errp, NULL, NULL);
3656 }
3657 if (error_is_set(errp)) {
3658 return NULL;
3659 }
3660 return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
3661 is_telnet, is_waitconnect, errp);
3662 }
3663
3664 static CharDriverState *qmp_chardev_open_udp(ChardevUdp *udp,
3665 Error **errp)
3666 {
3667 int fd;
3668
3669 fd = socket_dgram(udp->remote, udp->local, errp);
3670 if (error_is_set(errp)) {
3671 return NULL;
3672 }
3673 return qemu_chr_open_udp_fd(fd);
3674 }
3675
3676 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
3677 Error **errp)
3678 {
3679 ChardevReturn *ret = g_new0(ChardevReturn, 1);
3680 CharDriverState *base, *chr = NULL;
3681
3682 chr = qemu_chr_find(id);
3683 if (chr) {
3684 error_setg(errp, "Chardev '%s' already exists", id);
3685 g_free(ret);
3686 return NULL;
3687 }
3688
3689 switch (backend->kind) {
3690 case CHARDEV_BACKEND_KIND_FILE:
3691 chr = qmp_chardev_open_file(backend->file, errp);
3692 break;
3693 case CHARDEV_BACKEND_KIND_SERIAL:
3694 chr = qmp_chardev_open_serial(backend->serial, errp);
3695 break;
3696 case CHARDEV_BACKEND_KIND_PARALLEL:
3697 chr = qmp_chardev_open_parallel(backend->parallel, errp);
3698 break;
3699 case CHARDEV_BACKEND_KIND_PIPE:
3700 chr = qemu_chr_open_pipe(backend->pipe);
3701 break;
3702 case CHARDEV_BACKEND_KIND_SOCKET:
3703 chr = qmp_chardev_open_socket(backend->socket, errp);
3704 break;
3705 case CHARDEV_BACKEND_KIND_UDP:
3706 chr = qmp_chardev_open_udp(backend->udp, errp);
3707 break;
3708 #ifdef HAVE_CHARDEV_TTY
3709 case CHARDEV_BACKEND_KIND_PTY:
3710 chr = qemu_chr_open_pty(id, ret);
3711 break;
3712 #endif
3713 case CHARDEV_BACKEND_KIND_NULL:
3714 chr = qemu_chr_open_null();
3715 break;
3716 case CHARDEV_BACKEND_KIND_MUX:
3717 base = qemu_chr_find(backend->mux->chardev);
3718 if (base == NULL) {
3719 error_setg(errp, "mux: base chardev %s not found",
3720 backend->mux->chardev);
3721 break;
3722 }
3723 chr = qemu_chr_open_mux(base);
3724 break;
3725 case CHARDEV_BACKEND_KIND_MSMOUSE:
3726 chr = qemu_chr_open_msmouse();
3727 break;
3728 #ifdef CONFIG_BRLAPI
3729 case CHARDEV_BACKEND_KIND_BRAILLE:
3730 chr = chr_baum_init();
3731 break;
3732 #endif
3733 case CHARDEV_BACKEND_KIND_STDIO:
3734 chr = qemu_chr_open_stdio(backend->stdio);
3735 break;
3736 #ifdef _WIN32
3737 case CHARDEV_BACKEND_KIND_CONSOLE:
3738 chr = qemu_chr_open_win_con();
3739 break;
3740 #endif
3741 #ifdef CONFIG_SPICE
3742 case CHARDEV_BACKEND_KIND_SPICEVMC:
3743 chr = qemu_chr_open_spice_vmc(backend->spicevmc->type);
3744 break;
3745 case CHARDEV_BACKEND_KIND_SPICEPORT:
3746 chr = qemu_chr_open_spice_port(backend->spiceport->fqdn);
3747 break;
3748 #endif
3749 case CHARDEV_BACKEND_KIND_VC:
3750 chr = vc_init(backend->vc);
3751 break;
3752 case CHARDEV_BACKEND_KIND_RINGBUF:
3753 case CHARDEV_BACKEND_KIND_MEMORY:
3754 chr = qemu_chr_open_ringbuf(backend->ringbuf, errp);
3755 break;
3756 default:
3757 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
3758 break;
3759 }
3760
3761 if (chr == NULL && !error_is_set(errp)) {
3762 error_setg(errp, "Failed to create chardev");
3763 }
3764 if (chr) {
3765 chr->label = g_strdup(id);
3766 chr->avail_connections =
3767 (backend->kind == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
3768 if (!chr->filename) {
3769 chr->filename = g_strdup(ChardevBackendKind_lookup[backend->kind]);
3770 }
3771 if (!chr->explicit_be_open) {
3772 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
3773 }
3774 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
3775 return ret;
3776 } else {
3777 g_free(ret);
3778 return NULL;
3779 }
3780 }
3781
3782 void qmp_chardev_remove(const char *id, Error **errp)
3783 {
3784 CharDriverState *chr;
3785
3786 chr = qemu_chr_find(id);
3787 if (NULL == chr) {
3788 error_setg(errp, "Chardev '%s' not found", id);
3789 return;
3790 }
3791 if (chr->chr_can_read || chr->chr_read ||
3792 chr->chr_event || chr->handler_opaque) {
3793 error_setg(errp, "Chardev '%s' is busy", id);
3794 return;
3795 }
3796 qemu_chr_delete(chr);
3797 }
3798
3799 static void register_types(void)
3800 {
3801 register_char_driver_qapi("null", CHARDEV_BACKEND_KIND_NULL, NULL);
3802 register_char_driver("socket", qemu_chr_open_socket);
3803 register_char_driver("udp", qemu_chr_open_udp);
3804 register_char_driver_qapi("ringbuf", CHARDEV_BACKEND_KIND_RINGBUF,
3805 qemu_chr_parse_ringbuf);
3806 register_char_driver_qapi("file", CHARDEV_BACKEND_KIND_FILE,
3807 qemu_chr_parse_file_out);
3808 register_char_driver_qapi("stdio", CHARDEV_BACKEND_KIND_STDIO,
3809 qemu_chr_parse_stdio);
3810 register_char_driver_qapi("serial", CHARDEV_BACKEND_KIND_SERIAL,
3811 qemu_chr_parse_serial);
3812 register_char_driver_qapi("tty", CHARDEV_BACKEND_KIND_SERIAL,
3813 qemu_chr_parse_serial);
3814 register_char_driver_qapi("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
3815 qemu_chr_parse_parallel);
3816 register_char_driver_qapi("parport", CHARDEV_BACKEND_KIND_PARALLEL,
3817 qemu_chr_parse_parallel);
3818 register_char_driver_qapi("pty", CHARDEV_BACKEND_KIND_PTY, NULL);
3819 register_char_driver_qapi("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL);
3820 register_char_driver_qapi("pipe", CHARDEV_BACKEND_KIND_PIPE,
3821 qemu_chr_parse_pipe);
3822 register_char_driver_qapi("mux", CHARDEV_BACKEND_KIND_MUX,
3823 qemu_chr_parse_mux);
3824 /* Bug-compatibility: */
3825 register_char_driver_qapi("memory", CHARDEV_BACKEND_KIND_MEMORY,
3826 qemu_chr_parse_ringbuf);
3827 /* this must be done after machine init, since we register FEs with muxes
3828 * as part of realize functions like serial_isa_realizefn when -nographic
3829 * is specified
3830 */
3831 qemu_add_machine_init_done_notifier(&muxes_realize_notify);
3832 }
3833
3834 type_init(register_types);
QEmu