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char: remove init callback
[mirror_qemu.git] / qemu-char.c
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu/osdep.h"
25 #include "qemu-common.h"
26 #include "qemu/cutils.h"
27 #include "monitor/monitor.h"
28 #include "sysemu/sysemu.h"
29 #include "sysemu/block-backend.h"
30 #include "qemu/error-report.h"
31 #include "qemu/timer.h"
32 #include "sysemu/char.h"
33 #include "hw/usb.h"
34 #include "qmp-commands.h"
35 #include "qapi/clone-visitor.h"
36 #include "qapi-visit.h"
37 #include "qemu/base64.h"
38 #include "io/channel-socket.h"
39 #include "io/channel-file.h"
40 #include "io/channel-tls.h"
41 #include "sysemu/replay.h"
42 #include "qemu/help_option.h"
43
44 #include <zlib.h>
45
46 #ifndef _WIN32
47 #include <sys/times.h>
48 #include <sys/wait.h>
49 #include <termios.h>
50 #include <sys/ioctl.h>
51 #include <sys/resource.h>
52 #include <sys/socket.h>
53 #include <netinet/in.h>
54 #include <net/if.h>
55 #include <arpa/inet.h>
56 #include <netdb.h>
57 #include <sys/select.h>
58 #ifdef CONFIG_BSD
59 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
60 #include <dev/ppbus/ppi.h>
61 #include <dev/ppbus/ppbconf.h>
62 #elif defined(__DragonFly__)
63 #include <dev/misc/ppi/ppi.h>
64 #include <bus/ppbus/ppbconf.h>
65 #endif
66 #else
67 #ifdef __linux__
68 #include <linux/ppdev.h>
69 #include <linux/parport.h>
70 #endif
71 #ifdef __sun__
72 #include <sys/ethernet.h>
73 #include <sys/sockio.h>
74 #include <netinet/arp.h>
75 #include <netinet/in.h>
76 #include <netinet/in_systm.h>
77 #include <netinet/ip.h>
78 #include <netinet/ip_icmp.h> // must come after ip.h
79 #include <netinet/udp.h>
80 #include <netinet/tcp.h>
81 #endif
82 #endif
83 #endif
84
85 #include "qemu/sockets.h"
86 #include "ui/qemu-spice.h"
87
88 #define READ_BUF_LEN 4096
89 #define READ_RETRIES 10
90 #define TCP_MAX_FDS 16
91
92 /***********************************************************/
93 /* Socket address helpers */
94
95 static char *SocketAddress_to_str(const char *prefix, SocketAddress *addr,
96 bool is_listen, bool is_telnet)
97 {
98 switch (addr->type) {
99 case SOCKET_ADDRESS_KIND_INET:
100 return g_strdup_printf("%s%s:%s:%s%s", prefix,
101 is_telnet ? "telnet" : "tcp",
102 addr->u.inet.data->host,
103 addr->u.inet.data->port,
104 is_listen ? ",server" : "");
105 break;
106 case SOCKET_ADDRESS_KIND_UNIX:
107 return g_strdup_printf("%sunix:%s%s", prefix,
108 addr->u.q_unix.data->path,
109 is_listen ? ",server" : "");
110 break;
111 case SOCKET_ADDRESS_KIND_FD:
112 return g_strdup_printf("%sfd:%s%s", prefix, addr->u.fd.data->str,
113 is_listen ? ",server" : "");
114 break;
115 default:
116 abort();
117 }
118 }
119
120 static char *sockaddr_to_str(struct sockaddr_storage *ss, socklen_t ss_len,
121 struct sockaddr_storage *ps, socklen_t ps_len,
122 bool is_listen, bool is_telnet)
123 {
124 char shost[NI_MAXHOST], sserv[NI_MAXSERV];
125 char phost[NI_MAXHOST], pserv[NI_MAXSERV];
126 const char *left = "", *right = "";
127
128 switch (ss->ss_family) {
129 #ifndef _WIN32
130 case AF_UNIX:
131 return g_strdup_printf("unix:%s%s",
132 ((struct sockaddr_un *)(ss))->sun_path,
133 is_listen ? ",server" : "");
134 #endif
135 case AF_INET6:
136 left = "[";
137 right = "]";
138 /* fall through */
139 case AF_INET:
140 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost),
141 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV);
142 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost),
143 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV);
144 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s",
145 is_telnet ? "telnet" : "tcp",
146 left, shost, right, sserv,
147 is_listen ? ",server" : "",
148 left, phost, right, pserv);
149
150 default:
151 return g_strdup_printf("unknown");
152 }
153 }
154
155 /***********************************************************/
156 /* character device */
157
158 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
159 QTAILQ_HEAD_INITIALIZER(chardevs);
160
161 static void qemu_chr_free_common(CharDriverState *chr);
162
163 CharDriverState *qemu_chr_alloc(ChardevCommon *backend, Error **errp)
164 {
165 CharDriverState *chr = g_malloc0(sizeof(CharDriverState));
166 qemu_mutex_init(&chr->chr_write_lock);
167
168 if (backend->has_logfile) {
169 int flags = O_WRONLY | O_CREAT;
170 if (backend->has_logappend &&
171 backend->logappend) {
172 flags |= O_APPEND;
173 } else {
174 flags |= O_TRUNC;
175 }
176 chr->logfd = qemu_open(backend->logfile, flags, 0666);
177 if (chr->logfd < 0) {
178 error_setg_errno(errp, errno,
179 "Unable to open logfile %s",
180 backend->logfile);
181 g_free(chr);
182 return NULL;
183 }
184 } else {
185 chr->logfd = -1;
186 }
187
188 return chr;
189 }
190
191 void qemu_chr_be_event(CharDriverState *s, int event)
192 {
193 /* Keep track if the char device is open */
194 switch (event) {
195 case CHR_EVENT_OPENED:
196 s->be_open = 1;
197 break;
198 case CHR_EVENT_CLOSED:
199 s->be_open = 0;
200 break;
201 }
202
203 if (!s->chr_event)
204 return;
205 s->chr_event(s->handler_opaque, event);
206 }
207
208 void qemu_chr_be_generic_open(CharDriverState *s)
209 {
210 qemu_chr_be_event(s, CHR_EVENT_OPENED);
211 }
212
213
214 /* Not reporting errors from writing to logfile, as logs are
215 * defined to be "best effort" only */
216 static void qemu_chr_fe_write_log(CharDriverState *s,
217 const uint8_t *buf, size_t len)
218 {
219 size_t done = 0;
220 ssize_t ret;
221
222 if (s->logfd < 0) {
223 return;
224 }
225
226 while (done < len) {
227 retry:
228 ret = write(s->logfd, buf + done, len - done);
229 if (ret == -1 && errno == EAGAIN) {
230 g_usleep(100);
231 goto retry;
232 }
233
234 if (ret <= 0) {
235 return;
236 }
237 done += ret;
238 }
239 }
240
241 static int qemu_chr_fe_write_buffer(CharDriverState *s, const uint8_t *buf, int len, int *offset)
242 {
243 int res = 0;
244 *offset = 0;
245
246 qemu_mutex_lock(&s->chr_write_lock);
247 while (*offset < len) {
248 retry:
249 res = s->chr_write(s, buf + *offset, len - *offset);
250 if (res < 0 && errno == EAGAIN) {
251 g_usleep(100);
252 goto retry;
253 }
254
255 if (res <= 0) {
256 break;
257 }
258
259 *offset += res;
260 }
261 if (*offset > 0) {
262 qemu_chr_fe_write_log(s, buf, *offset);
263 }
264 qemu_mutex_unlock(&s->chr_write_lock);
265
266 return res;
267 }
268
269 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
270 {
271 int ret;
272
273 if (s->replay && replay_mode == REPLAY_MODE_PLAY) {
274 int offset;
275 replay_char_write_event_load(&ret, &offset);
276 assert(offset <= len);
277 qemu_chr_fe_write_buffer(s, buf, offset, &offset);
278 return ret;
279 }
280
281 qemu_mutex_lock(&s->chr_write_lock);
282 ret = s->chr_write(s, buf, len);
283
284 if (ret > 0) {
285 qemu_chr_fe_write_log(s, buf, ret);
286 }
287
288 qemu_mutex_unlock(&s->chr_write_lock);
289
290 if (s->replay && replay_mode == REPLAY_MODE_RECORD) {
291 replay_char_write_event_save(ret, ret < 0 ? 0 : ret);
292 }
293
294 return ret;
295 }
296
297 int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len)
298 {
299 int offset;
300 int res;
301
302 if (s->replay && replay_mode == REPLAY_MODE_PLAY) {
303 replay_char_write_event_load(&res, &offset);
304 assert(offset <= len);
305 qemu_chr_fe_write_buffer(s, buf, offset, &offset);
306 return res;
307 }
308
309 res = qemu_chr_fe_write_buffer(s, buf, len, &offset);
310
311 if (s->replay && replay_mode == REPLAY_MODE_RECORD) {
312 replay_char_write_event_save(res, offset);
313 }
314
315 if (res < 0) {
316 return res;
317 }
318 return offset;
319 }
320
321 int qemu_chr_fe_read_all(CharDriverState *s, uint8_t *buf, int len)
322 {
323 int offset = 0, counter = 10;
324 int res;
325
326 if (!s->chr_sync_read) {
327 return 0;
328 }
329
330 if (s->replay && replay_mode == REPLAY_MODE_PLAY) {
331 return replay_char_read_all_load(buf);
332 }
333
334 while (offset < len) {
335 retry:
336 res = s->chr_sync_read(s, buf + offset, len - offset);
337 if (res == -1 && errno == EAGAIN) {
338 g_usleep(100);
339 goto retry;
340 }
341
342 if (res == 0) {
343 break;
344 }
345
346 if (res < 0) {
347 if (s->replay && replay_mode == REPLAY_MODE_RECORD) {
348 replay_char_read_all_save_error(res);
349 }
350 return res;
351 }
352
353 offset += res;
354
355 if (!counter--) {
356 break;
357 }
358 }
359
360 if (s->replay && replay_mode == REPLAY_MODE_RECORD) {
361 replay_char_read_all_save_buf(buf, offset);
362 }
363 return offset;
364 }
365
366 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
367 {
368 int res;
369 if (!s->chr_ioctl || s->replay) {
370 res = -ENOTSUP;
371 } else {
372 res = s->chr_ioctl(s, cmd, arg);
373 }
374
375 return res;
376 }
377
378 int qemu_chr_be_can_write(CharDriverState *s)
379 {
380 if (!s->chr_can_read)
381 return 0;
382 return s->chr_can_read(s->handler_opaque);
383 }
384
385 void qemu_chr_be_write_impl(CharDriverState *s, uint8_t *buf, int len)
386 {
387 if (s->chr_read) {
388 s->chr_read(s->handler_opaque, buf, len);
389 }
390 }
391
392 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
393 {
394 if (s->replay) {
395 if (replay_mode == REPLAY_MODE_PLAY) {
396 return;
397 }
398 replay_chr_be_write(s, buf, len);
399 } else {
400 qemu_chr_be_write_impl(s, buf, len);
401 }
402 }
403
404 int qemu_chr_fe_get_msgfd(CharDriverState *s)
405 {
406 int fd;
407 int res = (qemu_chr_fe_get_msgfds(s, &fd, 1) == 1) ? fd : -1;
408 if (s->replay) {
409 fprintf(stderr,
410 "Replay: get msgfd is not supported for serial devices yet\n");
411 exit(1);
412 }
413 return res;
414 }
415
416 int qemu_chr_fe_get_msgfds(CharDriverState *s, int *fds, int len)
417 {
418 return s->get_msgfds ? s->get_msgfds(s, fds, len) : -1;
419 }
420
421 int qemu_chr_fe_set_msgfds(CharDriverState *s, int *fds, int num)
422 {
423 return s->set_msgfds ? s->set_msgfds(s, fds, num) : -1;
424 }
425
426 int qemu_chr_add_client(CharDriverState *s, int fd)
427 {
428 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
429 }
430
431 void qemu_chr_accept_input(CharDriverState *s)
432 {
433 if (s->chr_accept_input)
434 s->chr_accept_input(s);
435 qemu_notify_event();
436 }
437
438 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
439 {
440 char buf[READ_BUF_LEN];
441 va_list ap;
442 va_start(ap, fmt);
443 vsnprintf(buf, sizeof(buf), fmt, ap);
444 /* XXX this blocks entire thread. Rewrite to use
445 * qemu_chr_fe_write and background I/O callbacks */
446 qemu_chr_fe_write_all(s, (uint8_t *)buf, strlen(buf));
447 va_end(ap);
448 }
449
450 static void remove_fd_in_watch(CharDriverState *chr);
451
452 void qemu_chr_add_handlers_full(CharDriverState *s,
453 IOCanReadHandler *fd_can_read,
454 IOReadHandler *fd_read,
455 IOEventHandler *fd_event,
456 void *opaque,
457 GMainContext *context)
458 {
459 int fe_open;
460
461 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
462 fe_open = 0;
463 remove_fd_in_watch(s);
464 } else {
465 fe_open = 1;
466 }
467 s->chr_can_read = fd_can_read;
468 s->chr_read = fd_read;
469 s->chr_event = fd_event;
470 s->handler_opaque = opaque;
471 if (s->chr_update_read_handler) {
472 s->chr_update_read_handler(s, context);
473 }
474
475 if (!s->explicit_fe_open) {
476 qemu_chr_fe_set_open(s, fe_open);
477 }
478
479 /* We're connecting to an already opened device, so let's make sure we
480 also get the open event */
481 if (fe_open && s->be_open) {
482 qemu_chr_be_generic_open(s);
483 }
484 }
485
486 void qemu_chr_add_handlers(CharDriverState *s,
487 IOCanReadHandler *fd_can_read,
488 IOReadHandler *fd_read,
489 IOEventHandler *fd_event,
490 void *opaque)
491 {
492 qemu_chr_add_handlers_full(s, fd_can_read, fd_read,
493 fd_event, opaque, NULL);
494 }
495
496 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
497 {
498 return len;
499 }
500
501 static CharDriverState *qemu_chr_open_null(const char *id,
502 ChardevBackend *backend,
503 ChardevReturn *ret,
504 Error **errp)
505 {
506 CharDriverState *chr;
507 ChardevCommon *common = backend->u.null.data;
508
509 chr = qemu_chr_alloc(common, errp);
510 if (!chr) {
511 return NULL;
512 }
513 chr->chr_write = null_chr_write;
514 chr->explicit_be_open = true;
515 return chr;
516 }
517
518 /* MUX driver for serial I/O splitting */
519 #define MAX_MUX 4
520 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
521 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
522 typedef struct {
523 IOCanReadHandler *chr_can_read[MAX_MUX];
524 IOReadHandler *chr_read[MAX_MUX];
525 IOEventHandler *chr_event[MAX_MUX];
526 void *ext_opaque[MAX_MUX];
527 CharDriverState *drv;
528 int focus;
529 int mux_cnt;
530 int term_got_escape;
531 int max_size;
532 /* Intermediate input buffer allows to catch escape sequences even if the
533 currently active device is not accepting any input - but only until it
534 is full as well. */
535 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
536 int prod[MAX_MUX];
537 int cons[MAX_MUX];
538 int timestamps;
539
540 /* Protected by the CharDriverState chr_write_lock. */
541 int linestart;
542 int64_t timestamps_start;
543 } MuxDriver;
544
545
546 /* Called with chr_write_lock held. */
547 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
548 {
549 MuxDriver *d = chr->opaque;
550 int ret;
551 if (!d->timestamps) {
552 ret = qemu_chr_fe_write(d->drv, buf, len);
553 } else {
554 int i;
555
556 ret = 0;
557 for (i = 0; i < len; i++) {
558 if (d->linestart) {
559 char buf1[64];
560 int64_t ti;
561 int secs;
562
563 ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
564 if (d->timestamps_start == -1)
565 d->timestamps_start = ti;
566 ti -= d->timestamps_start;
567 secs = ti / 1000;
568 snprintf(buf1, sizeof(buf1),
569 "[%02d:%02d:%02d.%03d] ",
570 secs / 3600,
571 (secs / 60) % 60,
572 secs % 60,
573 (int)(ti % 1000));
574 /* XXX this blocks entire thread. Rewrite to use
575 * qemu_chr_fe_write and background I/O callbacks */
576 qemu_chr_fe_write_all(d->drv, (uint8_t *)buf1, strlen(buf1));
577 d->linestart = 0;
578 }
579 ret += qemu_chr_fe_write(d->drv, buf+i, 1);
580 if (buf[i] == '\n') {
581 d->linestart = 1;
582 }
583 }
584 }
585 return ret;
586 }
587
588 static const char * const mux_help[] = {
589 "% h print this help\n\r",
590 "% x exit emulator\n\r",
591 "% s save disk data back to file (if -snapshot)\n\r",
592 "% t toggle console timestamps\n\r",
593 "% b send break (magic sysrq)\n\r",
594 "% c switch between console and monitor\n\r",
595 "% % sends %\n\r",
596 NULL
597 };
598
599 int term_escape_char = 0x01; /* ctrl-a is used for escape */
600 static void mux_print_help(CharDriverState *chr)
601 {
602 int i, j;
603 char ebuf[15] = "Escape-Char";
604 char cbuf[50] = "\n\r";
605
606 if (term_escape_char > 0 && term_escape_char < 26) {
607 snprintf(cbuf, sizeof(cbuf), "\n\r");
608 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
609 } else {
610 snprintf(cbuf, sizeof(cbuf),
611 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
612 term_escape_char);
613 }
614 /* XXX this blocks entire thread. Rewrite to use
615 * qemu_chr_fe_write and background I/O callbacks */
616 qemu_chr_fe_write_all(chr, (uint8_t *)cbuf, strlen(cbuf));
617 for (i = 0; mux_help[i] != NULL; i++) {
618 for (j=0; mux_help[i][j] != '\0'; j++) {
619 if (mux_help[i][j] == '%')
620 qemu_chr_fe_write_all(chr, (uint8_t *)ebuf, strlen(ebuf));
621 else
622 qemu_chr_fe_write_all(chr, (uint8_t *)&mux_help[i][j], 1);
623 }
624 }
625 }
626
627 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
628 {
629 if (d->chr_event[mux_nr])
630 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
631 }
632
633 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
634 {
635 if (d->term_got_escape) {
636 d->term_got_escape = 0;
637 if (ch == term_escape_char)
638 goto send_char;
639 switch(ch) {
640 case '?':
641 case 'h':
642 mux_print_help(chr);
643 break;
644 case 'x':
645 {
646 const char *term = "QEMU: Terminated\n\r";
647 qemu_chr_fe_write_all(chr, (uint8_t *)term, strlen(term));
648 exit(0);
649 break;
650 }
651 case 's':
652 blk_commit_all();
653 break;
654 case 'b':
655 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
656 break;
657 case 'c':
658 /* Switch to the next registered device */
659 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
660 d->focus++;
661 if (d->focus >= d->mux_cnt)
662 d->focus = 0;
663 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
664 break;
665 case 't':
666 d->timestamps = !d->timestamps;
667 d->timestamps_start = -1;
668 d->linestart = 0;
669 break;
670 }
671 } else if (ch == term_escape_char) {
672 d->term_got_escape = 1;
673 } else {
674 send_char:
675 return 1;
676 }
677 return 0;
678 }
679
680 static void mux_chr_accept_input(CharDriverState *chr)
681 {
682 MuxDriver *d = chr->opaque;
683 int m = d->focus;
684
685 while (d->prod[m] != d->cons[m] &&
686 d->chr_can_read[m] &&
687 d->chr_can_read[m](d->ext_opaque[m])) {
688 d->chr_read[m](d->ext_opaque[m],
689 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
690 }
691 }
692
693 static int mux_chr_can_read(void *opaque)
694 {
695 CharDriverState *chr = opaque;
696 MuxDriver *d = chr->opaque;
697 int m = d->focus;
698
699 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
700 return 1;
701 if (d->chr_can_read[m])
702 return d->chr_can_read[m](d->ext_opaque[m]);
703 return 0;
704 }
705
706 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
707 {
708 CharDriverState *chr = opaque;
709 MuxDriver *d = chr->opaque;
710 int m = d->focus;
711 int i;
712
713 mux_chr_accept_input (opaque);
714
715 for(i = 0; i < size; i++)
716 if (mux_proc_byte(chr, d, buf[i])) {
717 if (d->prod[m] == d->cons[m] &&
718 d->chr_can_read[m] &&
719 d->chr_can_read[m](d->ext_opaque[m]))
720 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
721 else
722 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
723 }
724 }
725
726 static void mux_chr_event(void *opaque, int event)
727 {
728 CharDriverState *chr = opaque;
729 MuxDriver *d = chr->opaque;
730 int i;
731
732 /* Send the event to all registered listeners */
733 for (i = 0; i < d->mux_cnt; i++)
734 mux_chr_send_event(d, i, event);
735 }
736
737 static void mux_chr_update_read_handler(CharDriverState *chr,
738 GMainContext *context)
739 {
740 MuxDriver *d = chr->opaque;
741
742 if (d->mux_cnt >= MAX_MUX) {
743 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
744 return;
745 }
746 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
747 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
748 d->chr_read[d->mux_cnt] = chr->chr_read;
749 d->chr_event[d->mux_cnt] = chr->chr_event;
750 /* Fix up the real driver with mux routines */
751 if (d->mux_cnt == 0) {
752 qemu_chr_add_handlers_full(d->drv, mux_chr_can_read,
753 mux_chr_read,
754 mux_chr_event,
755 chr, context);
756 }
757 if (d->focus != -1) {
758 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
759 }
760 d->focus = d->mux_cnt;
761 d->mux_cnt++;
762 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
763 }
764
765 static bool muxes_realized;
766
767 /**
768 * Called after processing of default and command-line-specified
769 * chardevs to deliver CHR_EVENT_OPENED events to any FEs attached
770 * to a mux chardev. This is done here to ensure that
771 * output/prompts/banners are only displayed for the FE that has
772 * focus when initial command-line processing/machine init is
773 * completed.
774 *
775 * After this point, any new FE attached to any new or existing
776 * mux will receive CHR_EVENT_OPENED notifications for the BE
777 * immediately.
778 */
779 static void muxes_realize_done(Notifier *notifier, void *unused)
780 {
781 CharDriverState *chr;
782
783 QTAILQ_FOREACH(chr, &chardevs, next) {
784 if (chr->is_mux) {
785 MuxDriver *d = chr->opaque;
786 int i;
787
788 /* send OPENED to all already-attached FEs */
789 for (i = 0; i < d->mux_cnt; i++) {
790 mux_chr_send_event(d, i, CHR_EVENT_OPENED);
791 }
792 /* mark mux as OPENED so any new FEs will immediately receive
793 * OPENED event
794 */
795 qemu_chr_be_generic_open(chr);
796 }
797 }
798 muxes_realized = true;
799 }
800
801 static Notifier muxes_realize_notify = {
802 .notify = muxes_realize_done,
803 };
804
805 static GSource *mux_chr_add_watch(CharDriverState *s, GIOCondition cond)
806 {
807 MuxDriver *d = s->opaque;
808 return d->drv->chr_add_watch(d->drv, cond);
809 }
810
811 static void mux_chr_close(struct CharDriverState *chr)
812 {
813 MuxDriver *d = chr->opaque;
814
815 g_free(d);
816 }
817
818 static CharDriverState *qemu_chr_open_mux(const char *id,
819 ChardevBackend *backend,
820 ChardevReturn *ret, Error **errp)
821 {
822 ChardevMux *mux = backend->u.mux.data;
823 CharDriverState *chr, *drv;
824 MuxDriver *d;
825 ChardevCommon *common = qapi_ChardevMux_base(mux);
826
827 drv = qemu_chr_find(mux->chardev);
828 if (drv == NULL) {
829 error_setg(errp, "mux: base chardev %s not found", mux->chardev);
830 return NULL;
831 }
832
833 chr = qemu_chr_alloc(common, errp);
834 if (!chr) {
835 return NULL;
836 }
837 d = g_new0(MuxDriver, 1);
838
839 chr->opaque = d;
840 d->drv = drv;
841 d->focus = -1;
842 chr->chr_close = mux_chr_close;
843 chr->chr_write = mux_chr_write;
844 chr->chr_update_read_handler = mux_chr_update_read_handler;
845 chr->chr_accept_input = mux_chr_accept_input;
846 /* Frontend guest-open / -close notification is not support with muxes */
847 chr->chr_set_fe_open = NULL;
848 if (drv->chr_add_watch) {
849 chr->chr_add_watch = mux_chr_add_watch;
850 }
851 /* only default to opened state if we've realized the initial
852 * set of muxes
853 */
854 chr->explicit_be_open = muxes_realized ? 0 : 1;
855 chr->is_mux = 1;
856
857 return chr;
858 }
859
860
861 typedef struct IOWatchPoll
862 {
863 GSource parent;
864
865 QIOChannel *ioc;
866 GSource *src;
867
868 IOCanReadHandler *fd_can_read;
869 GSourceFunc fd_read;
870 void *opaque;
871 GMainContext *context;
872 } IOWatchPoll;
873
874 static IOWatchPoll *io_watch_poll_from_source(GSource *source)
875 {
876 return container_of(source, IOWatchPoll, parent);
877 }
878
879 static gboolean io_watch_poll_prepare(GSource *source,
880 gint *timeout_)
881 {
882 IOWatchPoll *iwp = io_watch_poll_from_source(source);
883 bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
884 bool was_active = iwp->src != NULL;
885 if (was_active == now_active) {
886 return FALSE;
887 }
888
889 if (now_active) {
890 iwp->src = qio_channel_create_watch(
891 iwp->ioc, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL);
892 g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
893 g_source_attach(iwp->src, iwp->context);
894 } else {
895 g_source_destroy(iwp->src);
896 g_source_unref(iwp->src);
897 iwp->src = NULL;
898 }
899 return FALSE;
900 }
901
902 static gboolean io_watch_poll_check(GSource *source)
903 {
904 return FALSE;
905 }
906
907 static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
908 gpointer user_data)
909 {
910 abort();
911 }
912
913 static void io_watch_poll_finalize(GSource *source)
914 {
915 /* Due to a glib bug, removing the last reference to a source
916 * inside a finalize callback causes recursive locking (and a
917 * deadlock). This is not a problem inside other callbacks,
918 * including dispatch callbacks, so we call io_remove_watch_poll
919 * to remove this source. At this point, iwp->src must
920 * be NULL, or we would leak it.
921 *
922 * This would be solved much more elegantly by child sources,
923 * but we support older glib versions that do not have them.
924 */
925 IOWatchPoll *iwp = io_watch_poll_from_source(source);
926 assert(iwp->src == NULL);
927 }
928
929 static GSourceFuncs io_watch_poll_funcs = {
930 .prepare = io_watch_poll_prepare,
931 .check = io_watch_poll_check,
932 .dispatch = io_watch_poll_dispatch,
933 .finalize = io_watch_poll_finalize,
934 };
935
936 /* Can only be used for read */
937 static guint io_add_watch_poll(QIOChannel *ioc,
938 IOCanReadHandler *fd_can_read,
939 QIOChannelFunc fd_read,
940 gpointer user_data,
941 GMainContext *context)
942 {
943 IOWatchPoll *iwp;
944 int tag;
945
946 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs,
947 sizeof(IOWatchPoll));
948 iwp->fd_can_read = fd_can_read;
949 iwp->opaque = user_data;
950 iwp->ioc = ioc;
951 iwp->fd_read = (GSourceFunc) fd_read;
952 iwp->src = NULL;
953 iwp->context = context;
954
955 tag = g_source_attach(&iwp->parent, context);
956 g_source_unref(&iwp->parent);
957 return tag;
958 }
959
960 static void io_remove_watch_poll(guint tag)
961 {
962 GSource *source;
963 IOWatchPoll *iwp;
964
965 g_return_if_fail (tag > 0);
966
967 source = g_main_context_find_source_by_id(NULL, tag);
968 g_return_if_fail (source != NULL);
969
970 iwp = io_watch_poll_from_source(source);
971 if (iwp->src) {
972 g_source_destroy(iwp->src);
973 g_source_unref(iwp->src);
974 iwp->src = NULL;
975 }
976 g_source_destroy(&iwp->parent);
977 }
978
979 static void remove_fd_in_watch(CharDriverState *chr)
980 {
981 if (chr->fd_in_tag) {
982 io_remove_watch_poll(chr->fd_in_tag);
983 chr->fd_in_tag = 0;
984 }
985 }
986
987
988 static int io_channel_send_full(QIOChannel *ioc,
989 const void *buf, size_t len,
990 int *fds, size_t nfds)
991 {
992 size_t offset = 0;
993
994 while (offset < len) {
995 ssize_t ret = 0;
996 struct iovec iov = { .iov_base = (char *)buf + offset,
997 .iov_len = len - offset };
998
999 ret = qio_channel_writev_full(
1000 ioc, &iov, 1,
1001 fds, nfds, NULL);
1002 if (ret == QIO_CHANNEL_ERR_BLOCK) {
1003 if (offset) {
1004 return offset;
1005 }
1006
1007 errno = EAGAIN;
1008 return -1;
1009 } else if (ret < 0) {
1010 errno = EINVAL;
1011 return -1;
1012 }
1013
1014 offset += ret;
1015 }
1016
1017 return offset;
1018 }
1019
1020
1021 #ifndef _WIN32
1022 static int io_channel_send(QIOChannel *ioc, const void *buf, size_t len)
1023 {
1024 return io_channel_send_full(ioc, buf, len, NULL, 0);
1025 }
1026
1027
1028 typedef struct FDCharDriver {
1029 CharDriverState *chr;
1030 QIOChannel *ioc_in, *ioc_out;
1031 int max_size;
1032 } FDCharDriver;
1033
1034 /* Called with chr_write_lock held. */
1035 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1036 {
1037 FDCharDriver *s = chr->opaque;
1038
1039 return io_channel_send(s->ioc_out, buf, len);
1040 }
1041
1042 static gboolean fd_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
1043 {
1044 CharDriverState *chr = opaque;
1045 FDCharDriver *s = chr->opaque;
1046 int len;
1047 uint8_t buf[READ_BUF_LEN];
1048 ssize_t ret;
1049
1050 len = sizeof(buf);
1051 if (len > s->max_size) {
1052 len = s->max_size;
1053 }
1054 if (len == 0) {
1055 return TRUE;
1056 }
1057
1058 ret = qio_channel_read(
1059 chan, (gchar *)buf, len, NULL);
1060 if (ret == 0) {
1061 remove_fd_in_watch(chr);
1062 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1063 return FALSE;
1064 }
1065 if (ret > 0) {
1066 qemu_chr_be_write(chr, buf, ret);
1067 }
1068
1069 return TRUE;
1070 }
1071
1072 static int fd_chr_read_poll(void *opaque)
1073 {
1074 CharDriverState *chr = opaque;
1075 FDCharDriver *s = chr->opaque;
1076
1077 s->max_size = qemu_chr_be_can_write(chr);
1078 return s->max_size;
1079 }
1080
1081 static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1082 {
1083 FDCharDriver *s = chr->opaque;
1084 return qio_channel_create_watch(s->ioc_out, cond);
1085 }
1086
1087 static void fd_chr_update_read_handler(CharDriverState *chr,
1088 GMainContext *context)
1089 {
1090 FDCharDriver *s = chr->opaque;
1091
1092 remove_fd_in_watch(chr);
1093 if (s->ioc_in) {
1094 chr->fd_in_tag = io_add_watch_poll(s->ioc_in,
1095 fd_chr_read_poll,
1096 fd_chr_read, chr,
1097 context);
1098 }
1099 }
1100
1101 static void fd_chr_close(struct CharDriverState *chr)
1102 {
1103 FDCharDriver *s = chr->opaque;
1104
1105 remove_fd_in_watch(chr);
1106 if (s->ioc_in) {
1107 object_unref(OBJECT(s->ioc_in));
1108 }
1109 if (s->ioc_out) {
1110 object_unref(OBJECT(s->ioc_out));
1111 }
1112
1113 g_free(s);
1114 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1115 }
1116
1117 /* open a character device to a unix fd */
1118 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out,
1119 ChardevCommon *backend, Error **errp)
1120 {
1121 CharDriverState *chr;
1122 FDCharDriver *s;
1123
1124 chr = qemu_chr_alloc(backend, errp);
1125 if (!chr) {
1126 return NULL;
1127 }
1128 s = g_new0(FDCharDriver, 1);
1129 s->ioc_in = QIO_CHANNEL(qio_channel_file_new_fd(fd_in));
1130 s->ioc_out = QIO_CHANNEL(qio_channel_file_new_fd(fd_out));
1131 qemu_set_nonblock(fd_out);
1132 s->chr = chr;
1133 chr->opaque = s;
1134 chr->chr_add_watch = fd_chr_add_watch;
1135 chr->chr_write = fd_chr_write;
1136 chr->chr_update_read_handler = fd_chr_update_read_handler;
1137 chr->chr_close = fd_chr_close;
1138
1139 return chr;
1140 }
1141
1142 static CharDriverState *qemu_chr_open_pipe(const char *id,
1143 ChardevBackend *backend,
1144 ChardevReturn *ret,
1145 Error **errp)
1146 {
1147 ChardevHostdev *opts = backend->u.pipe.data;
1148 int fd_in, fd_out;
1149 char *filename_in;
1150 char *filename_out;
1151 const char *filename = opts->device;
1152 ChardevCommon *common = qapi_ChardevHostdev_base(opts);
1153
1154
1155 filename_in = g_strdup_printf("%s.in", filename);
1156 filename_out = g_strdup_printf("%s.out", filename);
1157 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
1158 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
1159 g_free(filename_in);
1160 g_free(filename_out);
1161 if (fd_in < 0 || fd_out < 0) {
1162 if (fd_in >= 0)
1163 close(fd_in);
1164 if (fd_out >= 0)
1165 close(fd_out);
1166 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
1167 if (fd_in < 0) {
1168 error_setg_file_open(errp, errno, filename);
1169 return NULL;
1170 }
1171 }
1172 return qemu_chr_open_fd(fd_in, fd_out, common, errp);
1173 }
1174
1175 /* init terminal so that we can grab keys */
1176 static struct termios oldtty;
1177 static int old_fd0_flags;
1178 static bool stdio_in_use;
1179 static bool stdio_allow_signal;
1180 static bool stdio_echo_state;
1181
1182 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo);
1183
1184 static void term_exit(void)
1185 {
1186 tcsetattr (0, TCSANOW, &oldtty);
1187 fcntl(0, F_SETFL, old_fd0_flags);
1188 }
1189
1190 static void term_stdio_handler(int sig)
1191 {
1192 /* restore echo after resume from suspend. */
1193 qemu_chr_set_echo_stdio(NULL, stdio_echo_state);
1194 }
1195
1196 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
1197 {
1198 struct termios tty;
1199
1200 stdio_echo_state = echo;
1201 tty = oldtty;
1202 if (!echo) {
1203 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1204 |INLCR|IGNCR|ICRNL|IXON);
1205 tty.c_oflag |= OPOST;
1206 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1207 tty.c_cflag &= ~(CSIZE|PARENB);
1208 tty.c_cflag |= CS8;
1209 tty.c_cc[VMIN] = 1;
1210 tty.c_cc[VTIME] = 0;
1211 }
1212 if (!stdio_allow_signal)
1213 tty.c_lflag &= ~ISIG;
1214
1215 tcsetattr (0, TCSANOW, &tty);
1216 }
1217
1218 static void qemu_chr_close_stdio(struct CharDriverState *chr)
1219 {
1220 term_exit();
1221 fd_chr_close(chr);
1222 }
1223
1224 static CharDriverState *qemu_chr_open_stdio(const char *id,
1225 ChardevBackend *backend,
1226 ChardevReturn *ret,
1227 Error **errp)
1228 {
1229 ChardevStdio *opts = backend->u.stdio.data;
1230 CharDriverState *chr;
1231 struct sigaction act;
1232 ChardevCommon *common = qapi_ChardevStdio_base(opts);
1233
1234 if (is_daemonized()) {
1235 error_setg(errp, "cannot use stdio with -daemonize");
1236 return NULL;
1237 }
1238
1239 if (stdio_in_use) {
1240 error_setg(errp, "cannot use stdio by multiple character devices");
1241 return NULL;
1242 }
1243
1244 stdio_in_use = true;
1245 old_fd0_flags = fcntl(0, F_GETFL);
1246 tcgetattr(0, &oldtty);
1247 qemu_set_nonblock(0);
1248 atexit(term_exit);
1249
1250 memset(&act, 0, sizeof(act));
1251 act.sa_handler = term_stdio_handler;
1252 sigaction(SIGCONT, &act, NULL);
1253
1254 chr = qemu_chr_open_fd(0, 1, common, errp);
1255 if (!chr) {
1256 return NULL;
1257 }
1258 chr->chr_close = qemu_chr_close_stdio;
1259 chr->chr_set_echo = qemu_chr_set_echo_stdio;
1260 if (opts->has_signal) {
1261 stdio_allow_signal = opts->signal;
1262 }
1263 qemu_chr_fe_set_echo(chr, false);
1264
1265 return chr;
1266 }
1267
1268 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1269 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
1270 || defined(__GLIBC__)
1271
1272 #define HAVE_CHARDEV_SERIAL 1
1273 #define HAVE_CHARDEV_PTY 1
1274
1275 typedef struct {
1276 QIOChannel *ioc;
1277 int read_bytes;
1278
1279 /* Protected by the CharDriverState chr_write_lock. */
1280 int connected;
1281 guint timer_tag;
1282 guint open_tag;
1283 } PtyCharDriver;
1284
1285 static void pty_chr_update_read_handler_locked(CharDriverState *chr);
1286 static void pty_chr_state(CharDriverState *chr, int connected);
1287
1288 static gboolean pty_chr_timer(gpointer opaque)
1289 {
1290 struct CharDriverState *chr = opaque;
1291 PtyCharDriver *s = chr->opaque;
1292
1293 qemu_mutex_lock(&chr->chr_write_lock);
1294 s->timer_tag = 0;
1295 s->open_tag = 0;
1296 if (!s->connected) {
1297 /* Next poll ... */
1298 pty_chr_update_read_handler_locked(chr);
1299 }
1300 qemu_mutex_unlock(&chr->chr_write_lock);
1301 return FALSE;
1302 }
1303
1304 /* Called with chr_write_lock held. */
1305 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1306 {
1307 PtyCharDriver *s = chr->opaque;
1308
1309 if (s->timer_tag) {
1310 g_source_remove(s->timer_tag);
1311 s->timer_tag = 0;
1312 }
1313
1314 if (ms == 1000) {
1315 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1316 } else {
1317 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1318 }
1319 }
1320
1321 /* Called with chr_write_lock held. */
1322 static void pty_chr_update_read_handler_locked(CharDriverState *chr)
1323 {
1324 PtyCharDriver *s = chr->opaque;
1325 GPollFD pfd;
1326 int rc;
1327 QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc);
1328
1329 pfd.fd = fioc->fd;
1330 pfd.events = G_IO_OUT;
1331 pfd.revents = 0;
1332 do {
1333 rc = g_poll(&pfd, 1, 0);
1334 } while (rc == -1 && errno == EINTR);
1335 assert(rc >= 0);
1336
1337 if (pfd.revents & G_IO_HUP) {
1338 pty_chr_state(chr, 0);
1339 } else {
1340 pty_chr_state(chr, 1);
1341 }
1342 }
1343
1344 static void pty_chr_update_read_handler(CharDriverState *chr,
1345 GMainContext *context)
1346 {
1347 qemu_mutex_lock(&chr->chr_write_lock);
1348 pty_chr_update_read_handler_locked(chr);
1349 qemu_mutex_unlock(&chr->chr_write_lock);
1350 }
1351
1352 /* Called with chr_write_lock held. */
1353 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1354 {
1355 PtyCharDriver *s = chr->opaque;
1356
1357 if (!s->connected) {
1358 /* guest sends data, check for (re-)connect */
1359 pty_chr_update_read_handler_locked(chr);
1360 if (!s->connected) {
1361 return 0;
1362 }
1363 }
1364 return io_channel_send(s->ioc, buf, len);
1365 }
1366
1367 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1368 {
1369 PtyCharDriver *s = chr->opaque;
1370 if (!s->connected) {
1371 return NULL;
1372 }
1373 return qio_channel_create_watch(s->ioc, cond);
1374 }
1375
1376 static int pty_chr_read_poll(void *opaque)
1377 {
1378 CharDriverState *chr = opaque;
1379 PtyCharDriver *s = chr->opaque;
1380
1381 s->read_bytes = qemu_chr_be_can_write(chr);
1382 return s->read_bytes;
1383 }
1384
1385 static gboolean pty_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
1386 {
1387 CharDriverState *chr = opaque;
1388 PtyCharDriver *s = chr->opaque;
1389 gsize len;
1390 uint8_t buf[READ_BUF_LEN];
1391 ssize_t ret;
1392
1393 len = sizeof(buf);
1394 if (len > s->read_bytes)
1395 len = s->read_bytes;
1396 if (len == 0) {
1397 return TRUE;
1398 }
1399 ret = qio_channel_read(s->ioc, (char *)buf, len, NULL);
1400 if (ret <= 0) {
1401 pty_chr_state(chr, 0);
1402 return FALSE;
1403 } else {
1404 pty_chr_state(chr, 1);
1405 qemu_chr_be_write(chr, buf, ret);
1406 }
1407 return TRUE;
1408 }
1409
1410 static gboolean qemu_chr_be_generic_open_func(gpointer opaque)
1411 {
1412 CharDriverState *chr = opaque;
1413 PtyCharDriver *s = chr->opaque;
1414
1415 s->open_tag = 0;
1416 qemu_chr_be_generic_open(chr);
1417 return FALSE;
1418 }
1419
1420 /* Called with chr_write_lock held. */
1421 static void pty_chr_state(CharDriverState *chr, int connected)
1422 {
1423 PtyCharDriver *s = chr->opaque;
1424
1425 if (!connected) {
1426 if (s->open_tag) {
1427 g_source_remove(s->open_tag);
1428 s->open_tag = 0;
1429 }
1430 remove_fd_in_watch(chr);
1431 s->connected = 0;
1432 /* (re-)connect poll interval for idle guests: once per second.
1433 * We check more frequently in case the guests sends data to
1434 * the virtual device linked to our pty. */
1435 pty_chr_rearm_timer(chr, 1000);
1436 } else {
1437 if (s->timer_tag) {
1438 g_source_remove(s->timer_tag);
1439 s->timer_tag = 0;
1440 }
1441 if (!s->connected) {
1442 g_assert(s->open_tag == 0);
1443 s->connected = 1;
1444 s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, chr);
1445 }
1446 if (!chr->fd_in_tag) {
1447 chr->fd_in_tag = io_add_watch_poll(s->ioc,
1448 pty_chr_read_poll,
1449 pty_chr_read,
1450 chr, NULL);
1451 }
1452 }
1453 }
1454
1455 static void pty_chr_close(struct CharDriverState *chr)
1456 {
1457 PtyCharDriver *s = chr->opaque;
1458
1459 qemu_mutex_lock(&chr->chr_write_lock);
1460 pty_chr_state(chr, 0);
1461 object_unref(OBJECT(s->ioc));
1462 if (s->timer_tag) {
1463 g_source_remove(s->timer_tag);
1464 s->timer_tag = 0;
1465 }
1466 qemu_mutex_unlock(&chr->chr_write_lock);
1467 g_free(s);
1468 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1469 }
1470
1471 static CharDriverState *qemu_chr_open_pty(const char *id,
1472 ChardevBackend *backend,
1473 ChardevReturn *ret,
1474 Error **errp)
1475 {
1476 CharDriverState *chr;
1477 PtyCharDriver *s;
1478 int master_fd, slave_fd;
1479 char pty_name[PATH_MAX];
1480 ChardevCommon *common = backend->u.pty.data;
1481
1482 master_fd = qemu_openpty_raw(&slave_fd, pty_name);
1483 if (master_fd < 0) {
1484 error_setg_errno(errp, errno, "Failed to create PTY");
1485 return NULL;
1486 }
1487
1488 close(slave_fd);
1489 qemu_set_nonblock(master_fd);
1490
1491 chr = qemu_chr_alloc(common, errp);
1492 if (!chr) {
1493 close(master_fd);
1494 return NULL;
1495 }
1496
1497 chr->filename = g_strdup_printf("pty:%s", pty_name);
1498 ret->pty = g_strdup(pty_name);
1499 ret->has_pty = true;
1500
1501 fprintf(stderr, "char device redirected to %s (label %s)\n",
1502 pty_name, id);
1503
1504 s = g_new0(PtyCharDriver, 1);
1505 chr->opaque = s;
1506 chr->chr_write = pty_chr_write;
1507 chr->chr_update_read_handler = pty_chr_update_read_handler;
1508 chr->chr_close = pty_chr_close;
1509 chr->chr_add_watch = pty_chr_add_watch;
1510 chr->explicit_be_open = true;
1511
1512 s->ioc = QIO_CHANNEL(qio_channel_file_new_fd(master_fd));
1513 s->timer_tag = 0;
1514
1515 return chr;
1516 }
1517
1518 static void tty_serial_init(int fd, int speed,
1519 int parity, int data_bits, int stop_bits)
1520 {
1521 struct termios tty;
1522 speed_t spd;
1523
1524 #if 0
1525 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1526 speed, parity, data_bits, stop_bits);
1527 #endif
1528 tcgetattr (fd, &tty);
1529
1530 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1531 speed = speed * 10 / 11;
1532 do {
1533 check_speed(50);
1534 check_speed(75);
1535 check_speed(110);
1536 check_speed(134);
1537 check_speed(150);
1538 check_speed(200);
1539 check_speed(300);
1540 check_speed(600);
1541 check_speed(1200);
1542 check_speed(1800);
1543 check_speed(2400);
1544 check_speed(4800);
1545 check_speed(9600);
1546 check_speed(19200);
1547 check_speed(38400);
1548 /* Non-Posix values follow. They may be unsupported on some systems. */
1549 check_speed(57600);
1550 check_speed(115200);
1551 #ifdef B230400
1552 check_speed(230400);
1553 #endif
1554 #ifdef B460800
1555 check_speed(460800);
1556 #endif
1557 #ifdef B500000
1558 check_speed(500000);
1559 #endif
1560 #ifdef B576000
1561 check_speed(576000);
1562 #endif
1563 #ifdef B921600
1564 check_speed(921600);
1565 #endif
1566 #ifdef B1000000
1567 check_speed(1000000);
1568 #endif
1569 #ifdef B1152000
1570 check_speed(1152000);
1571 #endif
1572 #ifdef B1500000
1573 check_speed(1500000);
1574 #endif
1575 #ifdef B2000000
1576 check_speed(2000000);
1577 #endif
1578 #ifdef B2500000
1579 check_speed(2500000);
1580 #endif
1581 #ifdef B3000000
1582 check_speed(3000000);
1583 #endif
1584 #ifdef B3500000
1585 check_speed(3500000);
1586 #endif
1587 #ifdef B4000000
1588 check_speed(4000000);
1589 #endif
1590 spd = B115200;
1591 } while (0);
1592
1593 cfsetispeed(&tty, spd);
1594 cfsetospeed(&tty, spd);
1595
1596 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1597 |INLCR|IGNCR|ICRNL|IXON);
1598 tty.c_oflag |= OPOST;
1599 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1600 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1601 switch(data_bits) {
1602 default:
1603 case 8:
1604 tty.c_cflag |= CS8;
1605 break;
1606 case 7:
1607 tty.c_cflag |= CS7;
1608 break;
1609 case 6:
1610 tty.c_cflag |= CS6;
1611 break;
1612 case 5:
1613 tty.c_cflag |= CS5;
1614 break;
1615 }
1616 switch(parity) {
1617 default:
1618 case 'N':
1619 break;
1620 case 'E':
1621 tty.c_cflag |= PARENB;
1622 break;
1623 case 'O':
1624 tty.c_cflag |= PARENB | PARODD;
1625 break;
1626 }
1627 if (stop_bits == 2)
1628 tty.c_cflag |= CSTOPB;
1629
1630 tcsetattr (fd, TCSANOW, &tty);
1631 }
1632
1633 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1634 {
1635 FDCharDriver *s = chr->opaque;
1636 QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc_in);
1637
1638 switch(cmd) {
1639 case CHR_IOCTL_SERIAL_SET_PARAMS:
1640 {
1641 QEMUSerialSetParams *ssp = arg;
1642 tty_serial_init(fioc->fd,
1643 ssp->speed, ssp->parity,
1644 ssp->data_bits, ssp->stop_bits);
1645 }
1646 break;
1647 case CHR_IOCTL_SERIAL_SET_BREAK:
1648 {
1649 int enable = *(int *)arg;
1650 if (enable) {
1651 tcsendbreak(fioc->fd, 1);
1652 }
1653 }
1654 break;
1655 case CHR_IOCTL_SERIAL_GET_TIOCM:
1656 {
1657 int sarg = 0;
1658 int *targ = (int *)arg;
1659 ioctl(fioc->fd, TIOCMGET, &sarg);
1660 *targ = 0;
1661 if (sarg & TIOCM_CTS)
1662 *targ |= CHR_TIOCM_CTS;
1663 if (sarg & TIOCM_CAR)
1664 *targ |= CHR_TIOCM_CAR;
1665 if (sarg & TIOCM_DSR)
1666 *targ |= CHR_TIOCM_DSR;
1667 if (sarg & TIOCM_RI)
1668 *targ |= CHR_TIOCM_RI;
1669 if (sarg & TIOCM_DTR)
1670 *targ |= CHR_TIOCM_DTR;
1671 if (sarg & TIOCM_RTS)
1672 *targ |= CHR_TIOCM_RTS;
1673 }
1674 break;
1675 case CHR_IOCTL_SERIAL_SET_TIOCM:
1676 {
1677 int sarg = *(int *)arg;
1678 int targ = 0;
1679 ioctl(fioc->fd, TIOCMGET, &targ);
1680 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1681 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1682 if (sarg & CHR_TIOCM_CTS)
1683 targ |= TIOCM_CTS;
1684 if (sarg & CHR_TIOCM_CAR)
1685 targ |= TIOCM_CAR;
1686 if (sarg & CHR_TIOCM_DSR)
1687 targ |= TIOCM_DSR;
1688 if (sarg & CHR_TIOCM_RI)
1689 targ |= TIOCM_RI;
1690 if (sarg & CHR_TIOCM_DTR)
1691 targ |= TIOCM_DTR;
1692 if (sarg & CHR_TIOCM_RTS)
1693 targ |= TIOCM_RTS;
1694 ioctl(fioc->fd, TIOCMSET, &targ);
1695 }
1696 break;
1697 default:
1698 return -ENOTSUP;
1699 }
1700 return 0;
1701 }
1702
1703 static void qemu_chr_close_tty(CharDriverState *chr)
1704 {
1705 fd_chr_close(chr);
1706 }
1707
1708 static CharDriverState *qemu_chr_open_tty_fd(int fd,
1709 ChardevCommon *backend,
1710 Error **errp)
1711 {
1712 CharDriverState *chr;
1713
1714 tty_serial_init(fd, 115200, 'N', 8, 1);
1715 chr = qemu_chr_open_fd(fd, fd, backend, errp);
1716 if (!chr) {
1717 return NULL;
1718 }
1719 chr->chr_ioctl = tty_serial_ioctl;
1720 chr->chr_close = qemu_chr_close_tty;
1721 return chr;
1722 }
1723 #endif /* __linux__ || __sun__ */
1724
1725 #if defined(__linux__)
1726
1727 #define HAVE_CHARDEV_PARPORT 1
1728
1729 typedef struct {
1730 int fd;
1731 int mode;
1732 } ParallelCharDriver;
1733
1734 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1735 {
1736 if (s->mode != mode) {
1737 int m = mode;
1738 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1739 return 0;
1740 s->mode = mode;
1741 }
1742 return 1;
1743 }
1744
1745 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1746 {
1747 ParallelCharDriver *drv = chr->opaque;
1748 int fd = drv->fd;
1749 uint8_t b;
1750
1751 switch(cmd) {
1752 case CHR_IOCTL_PP_READ_DATA:
1753 if (ioctl(fd, PPRDATA, &b) < 0)
1754 return -ENOTSUP;
1755 *(uint8_t *)arg = b;
1756 break;
1757 case CHR_IOCTL_PP_WRITE_DATA:
1758 b = *(uint8_t *)arg;
1759 if (ioctl(fd, PPWDATA, &b) < 0)
1760 return -ENOTSUP;
1761 break;
1762 case CHR_IOCTL_PP_READ_CONTROL:
1763 if (ioctl(fd, PPRCONTROL, &b) < 0)
1764 return -ENOTSUP;
1765 /* Linux gives only the lowest bits, and no way to know data
1766 direction! For better compatibility set the fixed upper
1767 bits. */
1768 *(uint8_t *)arg = b | 0xc0;
1769 break;
1770 case CHR_IOCTL_PP_WRITE_CONTROL:
1771 b = *(uint8_t *)arg;
1772 if (ioctl(fd, PPWCONTROL, &b) < 0)
1773 return -ENOTSUP;
1774 break;
1775 case CHR_IOCTL_PP_READ_STATUS:
1776 if (ioctl(fd, PPRSTATUS, &b) < 0)
1777 return -ENOTSUP;
1778 *(uint8_t *)arg = b;
1779 break;
1780 case CHR_IOCTL_PP_DATA_DIR:
1781 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1782 return -ENOTSUP;
1783 break;
1784 case CHR_IOCTL_PP_EPP_READ_ADDR:
1785 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1786 struct ParallelIOArg *parg = arg;
1787 int n = read(fd, parg->buffer, parg->count);
1788 if (n != parg->count) {
1789 return -EIO;
1790 }
1791 }
1792 break;
1793 case CHR_IOCTL_PP_EPP_READ:
1794 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1795 struct ParallelIOArg *parg = arg;
1796 int n = read(fd, parg->buffer, parg->count);
1797 if (n != parg->count) {
1798 return -EIO;
1799 }
1800 }
1801 break;
1802 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1803 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1804 struct ParallelIOArg *parg = arg;
1805 int n = write(fd, parg->buffer, parg->count);
1806 if (n != parg->count) {
1807 return -EIO;
1808 }
1809 }
1810 break;
1811 case CHR_IOCTL_PP_EPP_WRITE:
1812 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1813 struct ParallelIOArg *parg = arg;
1814 int n = write(fd, parg->buffer, parg->count);
1815 if (n != parg->count) {
1816 return -EIO;
1817 }
1818 }
1819 break;
1820 default:
1821 return -ENOTSUP;
1822 }
1823 return 0;
1824 }
1825
1826 static void pp_close(CharDriverState *chr)
1827 {
1828 ParallelCharDriver *drv = chr->opaque;
1829 int fd = drv->fd;
1830
1831 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1832 ioctl(fd, PPRELEASE);
1833 close(fd);
1834 g_free(drv);
1835 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1836 }
1837
1838 static CharDriverState *qemu_chr_open_pp_fd(int fd,
1839 ChardevCommon *backend,
1840 Error **errp)
1841 {
1842 CharDriverState *chr;
1843 ParallelCharDriver *drv;
1844
1845 if (ioctl(fd, PPCLAIM) < 0) {
1846 error_setg_errno(errp, errno, "not a parallel port");
1847 close(fd);
1848 return NULL;
1849 }
1850
1851 chr = qemu_chr_alloc(backend, errp);
1852 if (!chr) {
1853 return NULL;
1854 }
1855
1856 drv = g_new0(ParallelCharDriver, 1);
1857 chr->opaque = drv;
1858 chr->chr_write = null_chr_write;
1859 chr->chr_ioctl = pp_ioctl;
1860 chr->chr_close = pp_close;
1861
1862 drv->fd = fd;
1863 drv->mode = IEEE1284_MODE_COMPAT;
1864
1865 return chr;
1866 }
1867 #endif /* __linux__ */
1868
1869 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1870
1871 #define HAVE_CHARDEV_PARPORT 1
1872
1873 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1874 {
1875 int fd = (int)(intptr_t)chr->opaque;
1876 uint8_t b;
1877
1878 switch(cmd) {
1879 case CHR_IOCTL_PP_READ_DATA:
1880 if (ioctl(fd, PPIGDATA, &b) < 0)
1881 return -ENOTSUP;
1882 *(uint8_t *)arg = b;
1883 break;
1884 case CHR_IOCTL_PP_WRITE_DATA:
1885 b = *(uint8_t *)arg;
1886 if (ioctl(fd, PPISDATA, &b) < 0)
1887 return -ENOTSUP;
1888 break;
1889 case CHR_IOCTL_PP_READ_CONTROL:
1890 if (ioctl(fd, PPIGCTRL, &b) < 0)
1891 return -ENOTSUP;
1892 *(uint8_t *)arg = b;
1893 break;
1894 case CHR_IOCTL_PP_WRITE_CONTROL:
1895 b = *(uint8_t *)arg;
1896 if (ioctl(fd, PPISCTRL, &b) < 0)
1897 return -ENOTSUP;
1898 break;
1899 case CHR_IOCTL_PP_READ_STATUS:
1900 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1901 return -ENOTSUP;
1902 *(uint8_t *)arg = b;
1903 break;
1904 default:
1905 return -ENOTSUP;
1906 }
1907 return 0;
1908 }
1909
1910 static CharDriverState *qemu_chr_open_pp_fd(int fd,
1911 ChardevCommon *backend,
1912 Error **errp)
1913 {
1914 CharDriverState *chr;
1915
1916 chr = qemu_chr_alloc(backend, errp);
1917 if (!chr) {
1918 return NULL;
1919 }
1920 chr->opaque = (void *)(intptr_t)fd;
1921 chr->chr_write = null_chr_write;
1922 chr->chr_ioctl = pp_ioctl;
1923 chr->explicit_be_open = true;
1924 return chr;
1925 }
1926 #endif
1927
1928 #else /* _WIN32 */
1929
1930 #define HAVE_CHARDEV_SERIAL 1
1931
1932 typedef struct {
1933 int max_size;
1934 HANDLE hcom, hrecv, hsend;
1935 OVERLAPPED orecv;
1936 BOOL fpipe;
1937 DWORD len;
1938
1939 /* Protected by the CharDriverState chr_write_lock. */
1940 OVERLAPPED osend;
1941 } WinCharState;
1942
1943 typedef struct {
1944 HANDLE hStdIn;
1945 HANDLE hInputReadyEvent;
1946 HANDLE hInputDoneEvent;
1947 HANDLE hInputThread;
1948 uint8_t win_stdio_buf;
1949 } WinStdioCharState;
1950
1951 #define NSENDBUF 2048
1952 #define NRECVBUF 2048
1953 #define MAXCONNECT 1
1954 #define NTIMEOUT 5000
1955
1956 static int win_chr_poll(void *opaque);
1957 static int win_chr_pipe_poll(void *opaque);
1958
1959 static void win_chr_close(CharDriverState *chr)
1960 {
1961 WinCharState *s = chr->opaque;
1962
1963 if (s->hsend) {
1964 CloseHandle(s->hsend);
1965 s->hsend = NULL;
1966 }
1967 if (s->hrecv) {
1968 CloseHandle(s->hrecv);
1969 s->hrecv = NULL;
1970 }
1971 if (s->hcom) {
1972 CloseHandle(s->hcom);
1973 s->hcom = NULL;
1974 }
1975 if (s->fpipe)
1976 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1977 else
1978 qemu_del_polling_cb(win_chr_poll, chr);
1979
1980 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1981 }
1982
1983 static int win_chr_init(CharDriverState *chr, const char *filename, Error **errp)
1984 {
1985 WinCharState *s = chr->opaque;
1986 COMMCONFIG comcfg;
1987 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1988 COMSTAT comstat;
1989 DWORD size;
1990 DWORD err;
1991
1992 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1993 if (!s->hsend) {
1994 error_setg(errp, "Failed CreateEvent");
1995 goto fail;
1996 }
1997 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1998 if (!s->hrecv) {
1999 error_setg(errp, "Failed CreateEvent");
2000 goto fail;
2001 }
2002
2003 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
2004 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
2005 if (s->hcom == INVALID_HANDLE_VALUE) {
2006 error_setg(errp, "Failed CreateFile (%lu)", GetLastError());
2007 s->hcom = NULL;
2008 goto fail;
2009 }
2010
2011 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
2012 error_setg(errp, "Failed SetupComm");
2013 goto fail;
2014 }
2015
2016 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
2017 size = sizeof(COMMCONFIG);
2018 GetDefaultCommConfig(filename, &comcfg, &size);
2019 comcfg.dcb.DCBlength = sizeof(DCB);
2020 CommConfigDialog(filename, NULL, &comcfg);
2021
2022 if (!SetCommState(s->hcom, &comcfg.dcb)) {
2023 error_setg(errp, "Failed SetCommState");
2024 goto fail;
2025 }
2026
2027 if (!SetCommMask(s->hcom, EV_ERR)) {
2028 error_setg(errp, "Failed SetCommMask");
2029 goto fail;
2030 }
2031
2032 cto.ReadIntervalTimeout = MAXDWORD;
2033 if (!SetCommTimeouts(s->hcom, &cto)) {
2034 error_setg(errp, "Failed SetCommTimeouts");
2035 goto fail;
2036 }
2037
2038 if (!ClearCommError(s->hcom, &err, &comstat)) {
2039 error_setg(errp, "Failed ClearCommError");
2040 goto fail;
2041 }
2042 qemu_add_polling_cb(win_chr_poll, chr);
2043 return 0;
2044
2045 fail:
2046 win_chr_close(chr);
2047 return -1;
2048 }
2049
2050 /* Called with chr_write_lock held. */
2051 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
2052 {
2053 WinCharState *s = chr->opaque;
2054 DWORD len, ret, size, err;
2055
2056 len = len1;
2057 ZeroMemory(&s->osend, sizeof(s->osend));
2058 s->osend.hEvent = s->hsend;
2059 while (len > 0) {
2060 if (s->hsend)
2061 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
2062 else
2063 ret = WriteFile(s->hcom, buf, len, &size, NULL);
2064 if (!ret) {
2065 err = GetLastError();
2066 if (err == ERROR_IO_PENDING) {
2067 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
2068 if (ret) {
2069 buf += size;
2070 len -= size;
2071 } else {
2072 break;
2073 }
2074 } else {
2075 break;
2076 }
2077 } else {
2078 buf += size;
2079 len -= size;
2080 }
2081 }
2082 return len1 - len;
2083 }
2084
2085 static int win_chr_read_poll(CharDriverState *chr)
2086 {
2087 WinCharState *s = chr->opaque;
2088
2089 s->max_size = qemu_chr_be_can_write(chr);
2090 return s->max_size;
2091 }
2092
2093 static void win_chr_readfile(CharDriverState *chr)
2094 {
2095 WinCharState *s = chr->opaque;
2096 int ret, err;
2097 uint8_t buf[READ_BUF_LEN];
2098 DWORD size;
2099
2100 ZeroMemory(&s->orecv, sizeof(s->orecv));
2101 s->orecv.hEvent = s->hrecv;
2102 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
2103 if (!ret) {
2104 err = GetLastError();
2105 if (err == ERROR_IO_PENDING) {
2106 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
2107 }
2108 }
2109
2110 if (size > 0) {
2111 qemu_chr_be_write(chr, buf, size);
2112 }
2113 }
2114
2115 static void win_chr_read(CharDriverState *chr)
2116 {
2117 WinCharState *s = chr->opaque;
2118
2119 if (s->len > s->max_size)
2120 s->len = s->max_size;
2121 if (s->len == 0)
2122 return;
2123
2124 win_chr_readfile(chr);
2125 }
2126
2127 static int win_chr_poll(void *opaque)
2128 {
2129 CharDriverState *chr = opaque;
2130 WinCharState *s = chr->opaque;
2131 COMSTAT status;
2132 DWORD comerr;
2133
2134 ClearCommError(s->hcom, &comerr, &status);
2135 if (status.cbInQue > 0) {
2136 s->len = status.cbInQue;
2137 win_chr_read_poll(chr);
2138 win_chr_read(chr);
2139 return 1;
2140 }
2141 return 0;
2142 }
2143
2144 static CharDriverState *qemu_chr_open_win_path(const char *filename,
2145 ChardevCommon *backend,
2146 Error **errp)
2147 {
2148 CharDriverState *chr;
2149 WinCharState *s;
2150
2151 chr = qemu_chr_alloc(backend, errp);
2152 if (!chr) {
2153 return NULL;
2154 }
2155 s = g_new0(WinCharState, 1);
2156 chr->opaque = s;
2157 chr->chr_write = win_chr_write;
2158 chr->chr_close = win_chr_close;
2159
2160 if (win_chr_init(chr, filename, errp) < 0) {
2161 g_free(s);
2162 qemu_chr_free_common(chr);
2163 return NULL;
2164 }
2165 return chr;
2166 }
2167
2168 static int win_chr_pipe_poll(void *opaque)
2169 {
2170 CharDriverState *chr = opaque;
2171 WinCharState *s = chr->opaque;
2172 DWORD size;
2173
2174 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
2175 if (size > 0) {
2176 s->len = size;
2177 win_chr_read_poll(chr);
2178 win_chr_read(chr);
2179 return 1;
2180 }
2181 return 0;
2182 }
2183
2184 static int win_chr_pipe_init(CharDriverState *chr, const char *filename,
2185 Error **errp)
2186 {
2187 WinCharState *s = chr->opaque;
2188 OVERLAPPED ov;
2189 int ret;
2190 DWORD size;
2191 char *openname;
2192
2193 s->fpipe = TRUE;
2194
2195 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
2196 if (!s->hsend) {
2197 error_setg(errp, "Failed CreateEvent");
2198 goto fail;
2199 }
2200 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
2201 if (!s->hrecv) {
2202 error_setg(errp, "Failed CreateEvent");
2203 goto fail;
2204 }
2205
2206 openname = g_strdup_printf("\\\\.\\pipe\\%s", filename);
2207 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
2208 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
2209 PIPE_WAIT,
2210 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
2211 g_free(openname);
2212 if (s->hcom == INVALID_HANDLE_VALUE) {
2213 error_setg(errp, "Failed CreateNamedPipe (%lu)", GetLastError());
2214 s->hcom = NULL;
2215 goto fail;
2216 }
2217
2218 ZeroMemory(&ov, sizeof(ov));
2219 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
2220 ret = ConnectNamedPipe(s->hcom, &ov);
2221 if (ret) {
2222 error_setg(errp, "Failed ConnectNamedPipe");
2223 goto fail;
2224 }
2225
2226 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
2227 if (!ret) {
2228 error_setg(errp, "Failed GetOverlappedResult");
2229 if (ov.hEvent) {
2230 CloseHandle(ov.hEvent);
2231 ov.hEvent = NULL;
2232 }
2233 goto fail;
2234 }
2235
2236 if (ov.hEvent) {
2237 CloseHandle(ov.hEvent);
2238 ov.hEvent = NULL;
2239 }
2240 qemu_add_polling_cb(win_chr_pipe_poll, chr);
2241 return 0;
2242
2243 fail:
2244 win_chr_close(chr);
2245 return -1;
2246 }
2247
2248
2249 static CharDriverState *qemu_chr_open_pipe(const char *id,
2250 ChardevBackend *backend,
2251 ChardevReturn *ret,
2252 Error **errp)
2253 {
2254 ChardevHostdev *opts = backend->u.pipe.data;
2255 const char *filename = opts->device;
2256 CharDriverState *chr;
2257 WinCharState *s;
2258 ChardevCommon *common = qapi_ChardevHostdev_base(opts);
2259
2260 chr = qemu_chr_alloc(common, errp);
2261 if (!chr) {
2262 return NULL;
2263 }
2264 s = g_new0(WinCharState, 1);
2265 chr->opaque = s;
2266 chr->chr_write = win_chr_write;
2267 chr->chr_close = win_chr_close;
2268
2269 if (win_chr_pipe_init(chr, filename, errp) < 0) {
2270 g_free(s);
2271 qemu_chr_free_common(chr);
2272 return NULL;
2273 }
2274 return chr;
2275 }
2276
2277 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out,
2278 ChardevCommon *backend,
2279 Error **errp)
2280 {
2281 CharDriverState *chr;
2282 WinCharState *s;
2283
2284 chr = qemu_chr_alloc(backend, errp);
2285 if (!chr) {
2286 return NULL;
2287 }
2288 s = g_new0(WinCharState, 1);
2289 s->hcom = fd_out;
2290 chr->opaque = s;
2291 chr->chr_write = win_chr_write;
2292 return chr;
2293 }
2294
2295 static CharDriverState *qemu_chr_open_win_con(const char *id,
2296 ChardevBackend *backend,
2297 ChardevReturn *ret,
2298 Error **errp)
2299 {
2300 ChardevCommon *common = backend->u.console.data;
2301 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE),
2302 common, errp);
2303 }
2304
2305 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
2306 {
2307 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
2308 DWORD dwSize;
2309 int len1;
2310
2311 len1 = len;
2312
2313 while (len1 > 0) {
2314 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
2315 break;
2316 }
2317 buf += dwSize;
2318 len1 -= dwSize;
2319 }
2320
2321 return len - len1;
2322 }
2323
2324 static void win_stdio_wait_func(void *opaque)
2325 {
2326 CharDriverState *chr = opaque;
2327 WinStdioCharState *stdio = chr->opaque;
2328 INPUT_RECORD buf[4];
2329 int ret;
2330 DWORD dwSize;
2331 int i;
2332
2333 ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize);
2334
2335 if (!ret) {
2336 /* Avoid error storm */
2337 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2338 return;
2339 }
2340
2341 for (i = 0; i < dwSize; i++) {
2342 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2343
2344 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2345 int j;
2346 if (kev->uChar.AsciiChar != 0) {
2347 for (j = 0; j < kev->wRepeatCount; j++) {
2348 if (qemu_chr_be_can_write(chr)) {
2349 uint8_t c = kev->uChar.AsciiChar;
2350 qemu_chr_be_write(chr, &c, 1);
2351 }
2352 }
2353 }
2354 }
2355 }
2356 }
2357
2358 static DWORD WINAPI win_stdio_thread(LPVOID param)
2359 {
2360 CharDriverState *chr = param;
2361 WinStdioCharState *stdio = chr->opaque;
2362 int ret;
2363 DWORD dwSize;
2364
2365 while (1) {
2366
2367 /* Wait for one byte */
2368 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2369
2370 /* Exit in case of error, continue if nothing read */
2371 if (!ret) {
2372 break;
2373 }
2374 if (!dwSize) {
2375 continue;
2376 }
2377
2378 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2379 if (stdio->win_stdio_buf == '\r') {
2380 continue;
2381 }
2382
2383 /* Signal the main thread and wait until the byte was eaten */
2384 if (!SetEvent(stdio->hInputReadyEvent)) {
2385 break;
2386 }
2387 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2388 != WAIT_OBJECT_0) {
2389 break;
2390 }
2391 }
2392
2393 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2394 return 0;
2395 }
2396
2397 static void win_stdio_thread_wait_func(void *opaque)
2398 {
2399 CharDriverState *chr = opaque;
2400 WinStdioCharState *stdio = chr->opaque;
2401
2402 if (qemu_chr_be_can_write(chr)) {
2403 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2404 }
2405
2406 SetEvent(stdio->hInputDoneEvent);
2407 }
2408
2409 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2410 {
2411 WinStdioCharState *stdio = chr->opaque;
2412 DWORD dwMode = 0;
2413
2414 GetConsoleMode(stdio->hStdIn, &dwMode);
2415
2416 if (echo) {
2417 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2418 } else {
2419 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2420 }
2421 }
2422
2423 static void win_stdio_close(CharDriverState *chr)
2424 {
2425 WinStdioCharState *stdio = chr->opaque;
2426
2427 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2428 CloseHandle(stdio->hInputReadyEvent);
2429 }
2430 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2431 CloseHandle(stdio->hInputDoneEvent);
2432 }
2433 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2434 TerminateThread(stdio->hInputThread, 0);
2435 }
2436
2437 g_free(chr->opaque);
2438 }
2439
2440 static CharDriverState *qemu_chr_open_stdio(const char *id,
2441 ChardevBackend *backend,
2442 ChardevReturn *ret,
2443 Error **errp)
2444 {
2445 CharDriverState *chr;
2446 WinStdioCharState *stdio;
2447 DWORD dwMode;
2448 int is_console = 0;
2449 ChardevCommon *common = qapi_ChardevStdio_base(backend->u.stdio.data);
2450
2451 chr = qemu_chr_alloc(common, errp);
2452 if (!chr) {
2453 return NULL;
2454 }
2455 stdio = g_new0(WinStdioCharState, 1);
2456
2457 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2458 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2459 error_setg(errp, "cannot open stdio: invalid handle");
2460 return NULL;
2461 }
2462
2463 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2464
2465 chr->opaque = stdio;
2466 chr->chr_write = win_stdio_write;
2467 chr->chr_close = win_stdio_close;
2468
2469 if (is_console) {
2470 if (qemu_add_wait_object(stdio->hStdIn,
2471 win_stdio_wait_func, chr)) {
2472 error_setg(errp, "qemu_add_wait_object: failed");
2473 goto err1;
2474 }
2475 } else {
2476 DWORD dwId;
2477
2478 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2479 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2480 if (stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2481 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2482 error_setg(errp, "cannot create event");
2483 goto err2;
2484 }
2485 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2486 win_stdio_thread_wait_func, chr)) {
2487 error_setg(errp, "qemu_add_wait_object: failed");
2488 goto err2;
2489 }
2490 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2491 chr, 0, &dwId);
2492
2493 if (stdio->hInputThread == INVALID_HANDLE_VALUE) {
2494 error_setg(errp, "cannot create stdio thread");
2495 goto err3;
2496 }
2497 }
2498
2499 dwMode |= ENABLE_LINE_INPUT;
2500
2501 if (is_console) {
2502 /* set the terminal in raw mode */
2503 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2504 dwMode |= ENABLE_PROCESSED_INPUT;
2505 }
2506
2507 SetConsoleMode(stdio->hStdIn, dwMode);
2508
2509 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2510 qemu_chr_fe_set_echo(chr, false);
2511
2512 return chr;
2513
2514 err3:
2515 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2516 err2:
2517 CloseHandle(stdio->hInputReadyEvent);
2518 CloseHandle(stdio->hInputDoneEvent);
2519 err1:
2520 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2521 return NULL;
2522 }
2523 #endif /* !_WIN32 */
2524
2525
2526 /***********************************************************/
2527 /* UDP Net console */
2528
2529 typedef struct {
2530 QIOChannel *ioc;
2531 uint8_t buf[READ_BUF_LEN];
2532 int bufcnt;
2533 int bufptr;
2534 int max_size;
2535 } NetCharDriver;
2536
2537 /* Called with chr_write_lock held. */
2538 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2539 {
2540 NetCharDriver *s = chr->opaque;
2541
2542 return qio_channel_write(
2543 s->ioc, (const char *)buf, len, NULL);
2544 }
2545
2546 static int udp_chr_read_poll(void *opaque)
2547 {
2548 CharDriverState *chr = opaque;
2549 NetCharDriver *s = chr->opaque;
2550
2551 s->max_size = qemu_chr_be_can_write(chr);
2552
2553 /* If there were any stray characters in the queue process them
2554 * first
2555 */
2556 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2557 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2558 s->bufptr++;
2559 s->max_size = qemu_chr_be_can_write(chr);
2560 }
2561 return s->max_size;
2562 }
2563
2564 static gboolean udp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
2565 {
2566 CharDriverState *chr = opaque;
2567 NetCharDriver *s = chr->opaque;
2568 ssize_t ret;
2569
2570 if (s->max_size == 0) {
2571 return TRUE;
2572 }
2573 ret = qio_channel_read(
2574 s->ioc, (char *)s->buf, sizeof(s->buf), NULL);
2575 if (ret <= 0) {
2576 remove_fd_in_watch(chr);
2577 return FALSE;
2578 }
2579 s->bufcnt = ret;
2580
2581 s->bufptr = 0;
2582 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2583 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2584 s->bufptr++;
2585 s->max_size = qemu_chr_be_can_write(chr);
2586 }
2587
2588 return TRUE;
2589 }
2590
2591 static void udp_chr_update_read_handler(CharDriverState *chr,
2592 GMainContext *context)
2593 {
2594 NetCharDriver *s = chr->opaque;
2595
2596 remove_fd_in_watch(chr);
2597 if (s->ioc) {
2598 chr->fd_in_tag = io_add_watch_poll(s->ioc,
2599 udp_chr_read_poll,
2600 udp_chr_read, chr,
2601 context);
2602 }
2603 }
2604
2605 static void udp_chr_close(CharDriverState *chr)
2606 {
2607 NetCharDriver *s = chr->opaque;
2608
2609 remove_fd_in_watch(chr);
2610 if (s->ioc) {
2611 object_unref(OBJECT(s->ioc));
2612 }
2613 g_free(s);
2614 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2615 }
2616
2617 static CharDriverState *qemu_chr_open_udp(QIOChannelSocket *sioc,
2618 ChardevCommon *backend,
2619 Error **errp)
2620 {
2621 CharDriverState *chr = NULL;
2622 NetCharDriver *s = NULL;
2623
2624 chr = qemu_chr_alloc(backend, errp);
2625 if (!chr) {
2626 return NULL;
2627 }
2628 s = g_new0(NetCharDriver, 1);
2629
2630 s->ioc = QIO_CHANNEL(sioc);
2631 s->bufcnt = 0;
2632 s->bufptr = 0;
2633 chr->opaque = s;
2634 chr->chr_write = udp_chr_write;
2635 chr->chr_update_read_handler = udp_chr_update_read_handler;
2636 chr->chr_close = udp_chr_close;
2637 /* be isn't opened until we get a connection */
2638 chr->explicit_be_open = true;
2639 return chr;
2640 }
2641
2642 /***********************************************************/
2643 /* TCP Net console */
2644
2645 typedef struct {
2646 QIOChannel *ioc; /* Client I/O channel */
2647 QIOChannelSocket *sioc; /* Client master channel */
2648 QIOChannelSocket *listen_ioc;
2649 guint listen_tag;
2650 QCryptoTLSCreds *tls_creds;
2651 int connected;
2652 int max_size;
2653 int do_telnetopt;
2654 int do_nodelay;
2655 int is_unix;
2656 int *read_msgfds;
2657 size_t read_msgfds_num;
2658 int *write_msgfds;
2659 size_t write_msgfds_num;
2660
2661 SocketAddress *addr;
2662 bool is_listen;
2663 bool is_telnet;
2664
2665 guint reconnect_timer;
2666 int64_t reconnect_time;
2667 bool connect_err_reported;
2668 } TCPCharDriver;
2669
2670 static gboolean socket_reconnect_timeout(gpointer opaque);
2671
2672 static void qemu_chr_socket_restart_timer(CharDriverState *chr)
2673 {
2674 TCPCharDriver *s = chr->opaque;
2675 assert(s->connected == 0);
2676 s->reconnect_timer = g_timeout_add_seconds(s->reconnect_time,
2677 socket_reconnect_timeout, chr);
2678 }
2679
2680 static void check_report_connect_error(CharDriverState *chr,
2681 Error *err)
2682 {
2683 TCPCharDriver *s = chr->opaque;
2684
2685 if (!s->connect_err_reported) {
2686 error_report("Unable to connect character device %s: %s",
2687 chr->label, error_get_pretty(err));
2688 s->connect_err_reported = true;
2689 }
2690 qemu_chr_socket_restart_timer(chr);
2691 }
2692
2693 static gboolean tcp_chr_accept(QIOChannel *chan,
2694 GIOCondition cond,
2695 void *opaque);
2696
2697 /* Called with chr_write_lock held. */
2698 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2699 {
2700 TCPCharDriver *s = chr->opaque;
2701 if (s->connected) {
2702 int ret = io_channel_send_full(s->ioc, buf, len,
2703 s->write_msgfds,
2704 s->write_msgfds_num);
2705
2706 /* free the written msgfds, no matter what */
2707 if (s->write_msgfds_num) {
2708 g_free(s->write_msgfds);
2709 s->write_msgfds = 0;
2710 s->write_msgfds_num = 0;
2711 }
2712
2713 return ret;
2714 } else {
2715 /* XXX: indicate an error ? */
2716 return len;
2717 }
2718 }
2719
2720 static int tcp_chr_read_poll(void *opaque)
2721 {
2722 CharDriverState *chr = opaque;
2723 TCPCharDriver *s = chr->opaque;
2724 if (!s->connected)
2725 return 0;
2726 s->max_size = qemu_chr_be_can_write(chr);
2727 return s->max_size;
2728 }
2729
2730 #define IAC 255
2731 #define IAC_BREAK 243
2732 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2733 TCPCharDriver *s,
2734 uint8_t *buf, int *size)
2735 {
2736 /* Handle any telnet client's basic IAC options to satisfy char by
2737 * char mode with no echo. All IAC options will be removed from
2738 * the buf and the do_telnetopt variable will be used to track the
2739 * state of the width of the IAC information.
2740 *
2741 * IAC commands come in sets of 3 bytes with the exception of the
2742 * "IAC BREAK" command and the double IAC.
2743 */
2744
2745 int i;
2746 int j = 0;
2747
2748 for (i = 0; i < *size; i++) {
2749 if (s->do_telnetopt > 1) {
2750 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2751 /* Double IAC means send an IAC */
2752 if (j != i)
2753 buf[j] = buf[i];
2754 j++;
2755 s->do_telnetopt = 1;
2756 } else {
2757 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2758 /* Handle IAC break commands by sending a serial break */
2759 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2760 s->do_telnetopt++;
2761 }
2762 s->do_telnetopt++;
2763 }
2764 if (s->do_telnetopt >= 4) {
2765 s->do_telnetopt = 1;
2766 }
2767 } else {
2768 if ((unsigned char)buf[i] == IAC) {
2769 s->do_telnetopt = 2;
2770 } else {
2771 if (j != i)
2772 buf[j] = buf[i];
2773 j++;
2774 }
2775 }
2776 }
2777 *size = j;
2778 }
2779
2780 static int tcp_get_msgfds(CharDriverState *chr, int *fds, int num)
2781 {
2782 TCPCharDriver *s = chr->opaque;
2783 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
2784
2785 assert(num <= TCP_MAX_FDS);
2786
2787 if (to_copy) {
2788 int i;
2789
2790 memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
2791
2792 /* Close unused fds */
2793 for (i = to_copy; i < s->read_msgfds_num; i++) {
2794 close(s->read_msgfds[i]);
2795 }
2796
2797 g_free(s->read_msgfds);
2798 s->read_msgfds = 0;
2799 s->read_msgfds_num = 0;
2800 }
2801
2802 return to_copy;
2803 }
2804
2805 static int tcp_set_msgfds(CharDriverState *chr, int *fds, int num)
2806 {
2807 TCPCharDriver *s = chr->opaque;
2808
2809 /* clear old pending fd array */
2810 g_free(s->write_msgfds);
2811 s->write_msgfds = NULL;
2812 s->write_msgfds_num = 0;
2813
2814 if (!s->connected ||
2815 !qio_channel_has_feature(s->ioc,
2816 QIO_CHANNEL_FEATURE_FD_PASS)) {
2817 return -1;
2818 }
2819
2820 if (num) {
2821 s->write_msgfds = g_new(int, num);
2822 memcpy(s->write_msgfds, fds, num * sizeof(int));
2823 }
2824
2825 s->write_msgfds_num = num;
2826
2827 return 0;
2828 }
2829
2830 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2831 {
2832 TCPCharDriver *s = chr->opaque;
2833 struct iovec iov = { .iov_base = buf, .iov_len = len };
2834 int ret;
2835 size_t i;
2836 int *msgfds = NULL;
2837 size_t msgfds_num = 0;
2838
2839 if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) {
2840 ret = qio_channel_readv_full(s->ioc, &iov, 1,
2841 &msgfds, &msgfds_num,
2842 NULL);
2843 } else {
2844 ret = qio_channel_readv_full(s->ioc, &iov, 1,
2845 NULL, NULL,
2846 NULL);
2847 }
2848
2849 if (ret == QIO_CHANNEL_ERR_BLOCK) {
2850 errno = EAGAIN;
2851 ret = -1;
2852 } else if (ret == -1) {
2853 errno = EIO;
2854 }
2855
2856 if (msgfds_num) {
2857 /* close and clean read_msgfds */
2858 for (i = 0; i < s->read_msgfds_num; i++) {
2859 close(s->read_msgfds[i]);
2860 }
2861
2862 if (s->read_msgfds_num) {
2863 g_free(s->read_msgfds);
2864 }
2865
2866 s->read_msgfds = msgfds;
2867 s->read_msgfds_num = msgfds_num;
2868 }
2869
2870 for (i = 0; i < s->read_msgfds_num; i++) {
2871 int fd = s->read_msgfds[i];
2872 if (fd < 0) {
2873 continue;
2874 }
2875
2876 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2877 qemu_set_block(fd);
2878
2879 #ifndef MSG_CMSG_CLOEXEC
2880 qemu_set_cloexec(fd);
2881 #endif
2882 }
2883
2884 return ret;
2885 }
2886
2887 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2888 {
2889 TCPCharDriver *s = chr->opaque;
2890 return qio_channel_create_watch(s->ioc, cond);
2891 }
2892
2893 static void tcp_chr_free_connection(CharDriverState *chr)
2894 {
2895 TCPCharDriver *s = chr->opaque;
2896 int i;
2897
2898 if (!s->connected) {
2899 return;
2900 }
2901
2902 if (s->read_msgfds_num) {
2903 for (i = 0; i < s->read_msgfds_num; i++) {
2904 close(s->read_msgfds[i]);
2905 }
2906 g_free(s->read_msgfds);
2907 s->read_msgfds = NULL;
2908 s->read_msgfds_num = 0;
2909 }
2910
2911 tcp_set_msgfds(chr, NULL, 0);
2912 remove_fd_in_watch(chr);
2913 object_unref(OBJECT(s->sioc));
2914 s->sioc = NULL;
2915 object_unref(OBJECT(s->ioc));
2916 s->ioc = NULL;
2917 g_free(chr->filename);
2918 chr->filename = NULL;
2919 s->connected = 0;
2920 }
2921
2922 static void tcp_chr_disconnect(CharDriverState *chr)
2923 {
2924 TCPCharDriver *s = chr->opaque;
2925
2926 if (!s->connected) {
2927 return;
2928 }
2929
2930 tcp_chr_free_connection(chr);
2931
2932 if (s->listen_ioc) {
2933 s->listen_tag = qio_channel_add_watch(
2934 QIO_CHANNEL(s->listen_ioc), G_IO_IN, tcp_chr_accept, chr, NULL);
2935 }
2936 chr->filename = SocketAddress_to_str("disconnected:", s->addr,
2937 s->is_listen, s->is_telnet);
2938 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2939 if (s->reconnect_time) {
2940 qemu_chr_socket_restart_timer(chr);
2941 }
2942 }
2943
2944 static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
2945 {
2946 CharDriverState *chr = opaque;
2947 TCPCharDriver *s = chr->opaque;
2948 uint8_t buf[READ_BUF_LEN];
2949 int len, size;
2950
2951 if (!s->connected || s->max_size <= 0) {
2952 return TRUE;
2953 }
2954 len = sizeof(buf);
2955 if (len > s->max_size)
2956 len = s->max_size;
2957 size = tcp_chr_recv(chr, (void *)buf, len);
2958 if (size == 0 || size == -1) {
2959 /* connection closed */
2960 tcp_chr_disconnect(chr);
2961 } else if (size > 0) {
2962 if (s->do_telnetopt)
2963 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2964 if (size > 0)
2965 qemu_chr_be_write(chr, buf, size);
2966 }
2967
2968 return TRUE;
2969 }
2970
2971 static int tcp_chr_sync_read(CharDriverState *chr, const uint8_t *buf, int len)
2972 {
2973 TCPCharDriver *s = chr->opaque;
2974 int size;
2975
2976 if (!s->connected) {
2977 return 0;
2978 }
2979
2980 size = tcp_chr_recv(chr, (void *) buf, len);
2981 if (size == 0) {
2982 /* connection closed */
2983 tcp_chr_disconnect(chr);
2984 }
2985
2986 return size;
2987 }
2988
2989 static void tcp_chr_connect(void *opaque)
2990 {
2991 CharDriverState *chr = opaque;
2992 TCPCharDriver *s = chr->opaque;
2993
2994 g_free(chr->filename);
2995 chr->filename = sockaddr_to_str(
2996 &s->sioc->localAddr, s->sioc->localAddrLen,
2997 &s->sioc->remoteAddr, s->sioc->remoteAddrLen,
2998 s->is_listen, s->is_telnet);
2999
3000 s->connected = 1;
3001 if (s->ioc) {
3002 chr->fd_in_tag = io_add_watch_poll(s->ioc,
3003 tcp_chr_read_poll,
3004 tcp_chr_read,
3005 chr, NULL);
3006 }
3007 qemu_chr_be_generic_open(chr);
3008 }
3009
3010 static void tcp_chr_update_read_handler(CharDriverState *chr,
3011 GMainContext *context)
3012 {
3013 TCPCharDriver *s = chr->opaque;
3014
3015 if (!s->connected) {
3016 return;
3017 }
3018
3019 remove_fd_in_watch(chr);
3020 if (s->ioc) {
3021 chr->fd_in_tag = io_add_watch_poll(s->ioc,
3022 tcp_chr_read_poll,
3023 tcp_chr_read, chr,
3024 context);
3025 }
3026 }
3027
3028 typedef struct {
3029 CharDriverState *chr;
3030 char buf[12];
3031 size_t buflen;
3032 } TCPCharDriverTelnetInit;
3033
3034 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc,
3035 GIOCondition cond G_GNUC_UNUSED,
3036 gpointer user_data)
3037 {
3038 TCPCharDriverTelnetInit *init = user_data;
3039 ssize_t ret;
3040
3041 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL);
3042 if (ret < 0) {
3043 if (ret == QIO_CHANNEL_ERR_BLOCK) {
3044 ret = 0;
3045 } else {
3046 tcp_chr_disconnect(init->chr);
3047 return FALSE;
3048 }
3049 }
3050 init->buflen -= ret;
3051
3052 if (init->buflen == 0) {
3053 tcp_chr_connect(init->chr);
3054 return FALSE;
3055 }
3056
3057 memmove(init->buf, init->buf + ret, init->buflen);
3058
3059 return TRUE;
3060 }
3061
3062 static void tcp_chr_telnet_init(CharDriverState *chr)
3063 {
3064 TCPCharDriver *s = chr->opaque;
3065 TCPCharDriverTelnetInit *init =
3066 g_new0(TCPCharDriverTelnetInit, 1);
3067 size_t n = 0;
3068
3069 init->chr = chr;
3070 init->buflen = 12;
3071
3072 #define IACSET(x, a, b, c) \
3073 do { \
3074 x[n++] = a; \
3075 x[n++] = b; \
3076 x[n++] = c; \
3077 } while (0)
3078
3079 /* Prep the telnet negotion to put telnet in binary,
3080 * no echo, single char mode */
3081 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
3082 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
3083 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
3084 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
3085
3086 #undef IACSET
3087
3088 qio_channel_add_watch(
3089 s->ioc, G_IO_OUT,
3090 tcp_chr_telnet_init_io,
3091 init, NULL);
3092 }
3093
3094
3095 static void tcp_chr_tls_handshake(Object *source,
3096 Error *err,
3097 gpointer user_data)
3098 {
3099 CharDriverState *chr = user_data;
3100 TCPCharDriver *s = chr->opaque;
3101
3102 if (err) {
3103 tcp_chr_disconnect(chr);
3104 } else {
3105 if (s->do_telnetopt) {
3106 tcp_chr_telnet_init(chr);
3107 } else {
3108 tcp_chr_connect(chr);
3109 }
3110 }
3111 }
3112
3113
3114 static void tcp_chr_tls_init(CharDriverState *chr)
3115 {
3116 TCPCharDriver *s = chr->opaque;
3117 QIOChannelTLS *tioc;
3118 Error *err = NULL;
3119
3120 if (s->is_listen) {
3121 tioc = qio_channel_tls_new_server(
3122 s->ioc, s->tls_creds,
3123 NULL, /* XXX Use an ACL */
3124 &err);
3125 } else {
3126 tioc = qio_channel_tls_new_client(
3127 s->ioc, s->tls_creds,
3128 s->addr->u.inet.data->host,
3129 &err);
3130 }
3131 if (tioc == NULL) {
3132 error_free(err);
3133 tcp_chr_disconnect(chr);
3134 return;
3135 }
3136 object_unref(OBJECT(s->ioc));
3137 s->ioc = QIO_CHANNEL(tioc);
3138
3139 qio_channel_tls_handshake(tioc,
3140 tcp_chr_tls_handshake,
3141 chr,
3142 NULL);
3143 }
3144
3145
3146 static int tcp_chr_new_client(CharDriverState *chr, QIOChannelSocket *sioc)
3147 {
3148 TCPCharDriver *s = chr->opaque;
3149 if (s->ioc != NULL) {
3150 return -1;
3151 }
3152
3153 s->ioc = QIO_CHANNEL(sioc);
3154 object_ref(OBJECT(sioc));
3155 s->sioc = sioc;
3156 object_ref(OBJECT(sioc));
3157
3158 qio_channel_set_blocking(s->ioc, false, NULL);
3159
3160 if (s->do_nodelay) {
3161 qio_channel_set_delay(s->ioc, false);
3162 }
3163 if (s->listen_tag) {
3164 g_source_remove(s->listen_tag);
3165 s->listen_tag = 0;
3166 }
3167
3168 if (s->tls_creds) {
3169 tcp_chr_tls_init(chr);
3170 } else {
3171 if (s->do_telnetopt) {
3172 tcp_chr_telnet_init(chr);
3173 } else {
3174 tcp_chr_connect(chr);
3175 }
3176 }
3177
3178 return 0;
3179 }
3180
3181
3182 static int tcp_chr_add_client(CharDriverState *chr, int fd)
3183 {
3184 int ret;
3185 QIOChannelSocket *sioc;
3186
3187 sioc = qio_channel_socket_new_fd(fd, NULL);
3188 if (!sioc) {
3189 return -1;
3190 }
3191 ret = tcp_chr_new_client(chr, sioc);
3192 object_unref(OBJECT(sioc));
3193 return ret;
3194 }
3195
3196 static gboolean tcp_chr_accept(QIOChannel *channel,
3197 GIOCondition cond,
3198 void *opaque)
3199 {
3200 CharDriverState *chr = opaque;
3201 QIOChannelSocket *sioc;
3202
3203 sioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(channel),
3204 NULL);
3205 if (!sioc) {
3206 return TRUE;
3207 }
3208
3209 tcp_chr_new_client(chr, sioc);
3210
3211 object_unref(OBJECT(sioc));
3212
3213 return TRUE;
3214 }
3215
3216 static int tcp_chr_wait_connected(CharDriverState *chr, Error **errp)
3217 {
3218 TCPCharDriver *s = chr->opaque;
3219 QIOChannelSocket *sioc;
3220
3221 /* It can't wait on s->connected, since it is set asynchronously
3222 * in TLS and telnet cases, only wait for an accepted socket */
3223 while (!s->ioc) {
3224 if (s->is_listen) {
3225 fprintf(stderr, "QEMU waiting for connection on: %s\n",
3226 chr->filename);
3227 qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), true, NULL);
3228 tcp_chr_accept(QIO_CHANNEL(s->listen_ioc), G_IO_IN, chr);
3229 qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), false, NULL);
3230 } else {
3231 sioc = qio_channel_socket_new();
3232 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) {
3233 object_unref(OBJECT(sioc));
3234 return -1;
3235 }
3236 tcp_chr_new_client(chr, sioc);
3237 object_unref(OBJECT(sioc));
3238 }
3239 }
3240
3241 return 0;
3242 }
3243
3244 int qemu_chr_wait_connected(CharDriverState *chr, Error **errp)
3245 {
3246 if (chr->chr_wait_connected) {
3247 return chr->chr_wait_connected(chr, errp);
3248 }
3249
3250 return 0;
3251 }
3252
3253 static void tcp_chr_close(CharDriverState *chr)
3254 {
3255 TCPCharDriver *s = chr->opaque;
3256
3257 tcp_chr_free_connection(chr);
3258
3259 if (s->reconnect_timer) {
3260 g_source_remove(s->reconnect_timer);
3261 s->reconnect_timer = 0;
3262 }
3263 qapi_free_SocketAddress(s->addr);
3264 if (s->listen_tag) {
3265 g_source_remove(s->listen_tag);
3266 s->listen_tag = 0;
3267 }
3268 if (s->listen_ioc) {
3269 object_unref(OBJECT(s->listen_ioc));
3270 }
3271 if (s->tls_creds) {
3272 object_unref(OBJECT(s->tls_creds));
3273 }
3274 g_free(s);
3275 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
3276 }
3277
3278
3279 static void qemu_chr_socket_connected(Object *src, Error *err, void *opaque)
3280 {
3281 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(src);
3282 CharDriverState *chr = opaque;
3283 TCPCharDriver *s = chr->opaque;
3284
3285 if (err) {
3286 check_report_connect_error(chr, err);
3287 object_unref(src);
3288 return;
3289 }
3290
3291 s->connect_err_reported = false;
3292 tcp_chr_new_client(chr, sioc);
3293 object_unref(OBJECT(sioc));
3294 }
3295
3296
3297 /*********************************************************/
3298 /* Ring buffer chardev */
3299
3300 typedef struct {
3301 size_t size;
3302 size_t prod;
3303 size_t cons;
3304 uint8_t *cbuf;
3305 } RingBufCharDriver;
3306
3307 static size_t ringbuf_count(const CharDriverState *chr)
3308 {
3309 const RingBufCharDriver *d = chr->opaque;
3310
3311 return d->prod - d->cons;
3312 }
3313
3314 /* Called with chr_write_lock held. */
3315 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
3316 {
3317 RingBufCharDriver *d = chr->opaque;
3318 int i;
3319
3320 if (!buf || (len < 0)) {
3321 return -1;
3322 }
3323
3324 for (i = 0; i < len; i++ ) {
3325 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
3326 if (d->prod - d->cons > d->size) {
3327 d->cons = d->prod - d->size;
3328 }
3329 }
3330
3331 return len;
3332 }
3333
3334 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
3335 {
3336 RingBufCharDriver *d = chr->opaque;
3337 int i;
3338
3339 qemu_mutex_lock(&chr->chr_write_lock);
3340 for (i = 0; i < len && d->cons != d->prod; i++) {
3341 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
3342 }
3343 qemu_mutex_unlock(&chr->chr_write_lock);
3344
3345 return i;
3346 }
3347
3348 static void ringbuf_chr_close(struct CharDriverState *chr)
3349 {
3350 RingBufCharDriver *d = chr->opaque;
3351
3352 g_free(d->cbuf);
3353 g_free(d);
3354 chr->opaque = NULL;
3355 }
3356
3357 static CharDriverState *qemu_chr_open_ringbuf(const char *id,
3358 ChardevBackend *backend,
3359 ChardevReturn *ret,
3360 Error **errp)
3361 {
3362 ChardevRingbuf *opts = backend->u.ringbuf.data;
3363 ChardevCommon *common = qapi_ChardevRingbuf_base(opts);
3364 CharDriverState *chr;
3365 RingBufCharDriver *d;
3366
3367 chr = qemu_chr_alloc(common, errp);
3368 if (!chr) {
3369 return NULL;
3370 }
3371 d = g_malloc(sizeof(*d));
3372
3373 d->size = opts->has_size ? opts->size : 65536;
3374
3375 /* The size must be power of 2 */
3376 if (d->size & (d->size - 1)) {
3377 error_setg(errp, "size of ringbuf chardev must be power of two");
3378 goto fail;
3379 }
3380
3381 d->prod = 0;
3382 d->cons = 0;
3383 d->cbuf = g_malloc0(d->size);
3384
3385 chr->opaque = d;
3386 chr->chr_write = ringbuf_chr_write;
3387 chr->chr_close = ringbuf_chr_close;
3388
3389 return chr;
3390
3391 fail:
3392 g_free(d);
3393 qemu_chr_free_common(chr);
3394 return NULL;
3395 }
3396
3397 bool chr_is_ringbuf(const CharDriverState *chr)
3398 {
3399 return chr->chr_write == ringbuf_chr_write;
3400 }
3401
3402 void qmp_ringbuf_write(const char *device, const char *data,
3403 bool has_format, enum DataFormat format,
3404 Error **errp)
3405 {
3406 CharDriverState *chr;
3407 const uint8_t *write_data;
3408 int ret;
3409 gsize write_count;
3410
3411 chr = qemu_chr_find(device);
3412 if (!chr) {
3413 error_setg(errp, "Device '%s' not found", device);
3414 return;
3415 }
3416
3417 if (!chr_is_ringbuf(chr)) {
3418 error_setg(errp,"%s is not a ringbuf device", device);
3419 return;
3420 }
3421
3422 if (has_format && (format == DATA_FORMAT_BASE64)) {
3423 write_data = qbase64_decode(data, -1,
3424 &write_count,
3425 errp);
3426 if (!write_data) {
3427 return;
3428 }
3429 } else {
3430 write_data = (uint8_t *)data;
3431 write_count = strlen(data);
3432 }
3433
3434 ret = ringbuf_chr_write(chr, write_data, write_count);
3435
3436 if (write_data != (uint8_t *)data) {
3437 g_free((void *)write_data);
3438 }
3439
3440 if (ret < 0) {
3441 error_setg(errp, "Failed to write to device %s", device);
3442 return;
3443 }
3444 }
3445
3446 char *qmp_ringbuf_read(const char *device, int64_t size,
3447 bool has_format, enum DataFormat format,
3448 Error **errp)
3449 {
3450 CharDriverState *chr;
3451 uint8_t *read_data;
3452 size_t count;
3453 char *data;
3454
3455 chr = qemu_chr_find(device);
3456 if (!chr) {
3457 error_setg(errp, "Device '%s' not found", device);
3458 return NULL;
3459 }
3460
3461 if (!chr_is_ringbuf(chr)) {
3462 error_setg(errp,"%s is not a ringbuf device", device);
3463 return NULL;
3464 }
3465
3466 if (size <= 0) {
3467 error_setg(errp, "size must be greater than zero");
3468 return NULL;
3469 }
3470
3471 count = ringbuf_count(chr);
3472 size = size > count ? count : size;
3473 read_data = g_malloc(size + 1);
3474
3475 ringbuf_chr_read(chr, read_data, size);
3476
3477 if (has_format && (format == DATA_FORMAT_BASE64)) {
3478 data = g_base64_encode(read_data, size);
3479 g_free(read_data);
3480 } else {
3481 /*
3482 * FIXME should read only complete, valid UTF-8 characters up
3483 * to @size bytes. Invalid sequences should be replaced by a
3484 * suitable replacement character. Except when (and only
3485 * when) ring buffer lost characters since last read, initial
3486 * continuation characters should be dropped.
3487 */
3488 read_data[size] = 0;
3489 data = (char *)read_data;
3490 }
3491
3492 return data;
3493 }
3494
3495 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
3496 {
3497 char host[65], port[33], width[8], height[8];
3498 int pos;
3499 const char *p;
3500 QemuOpts *opts;
3501 Error *local_err = NULL;
3502
3503 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
3504 if (local_err) {
3505 error_report_err(local_err);
3506 return NULL;
3507 }
3508
3509 if (strstart(filename, "mon:", &p)) {
3510 filename = p;
3511 qemu_opt_set(opts, "mux", "on", &error_abort);
3512 if (strcmp(filename, "stdio") == 0) {
3513 /* Monitor is muxed to stdio: do not exit on Ctrl+C by default
3514 * but pass it to the guest. Handle this only for compat syntax,
3515 * for -chardev syntax we have special option for this.
3516 * This is what -nographic did, redirecting+muxing serial+monitor
3517 * to stdio causing Ctrl+C to be passed to guest. */
3518 qemu_opt_set(opts, "signal", "off", &error_abort);
3519 }
3520 }
3521
3522 if (strcmp(filename, "null") == 0 ||
3523 strcmp(filename, "pty") == 0 ||
3524 strcmp(filename, "msmouse") == 0 ||
3525 strcmp(filename, "braille") == 0 ||
3526 strcmp(filename, "testdev") == 0 ||
3527 strcmp(filename, "stdio") == 0) {
3528 qemu_opt_set(opts, "backend", filename, &error_abort);
3529 return opts;
3530 }
3531 if (strstart(filename, "vc", &p)) {
3532 qemu_opt_set(opts, "backend", "vc", &error_abort);
3533 if (*p == ':') {
3534 if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
3535 /* pixels */
3536 qemu_opt_set(opts, "width", width, &error_abort);
3537 qemu_opt_set(opts, "height", height, &error_abort);
3538 } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
3539 /* chars */
3540 qemu_opt_set(opts, "cols", width, &error_abort);
3541 qemu_opt_set(opts, "rows", height, &error_abort);
3542 } else {
3543 goto fail;
3544 }
3545 }
3546 return opts;
3547 }
3548 if (strcmp(filename, "con:") == 0) {
3549 qemu_opt_set(opts, "backend", "console", &error_abort);
3550 return opts;
3551 }
3552 if (strstart(filename, "COM", NULL)) {
3553 qemu_opt_set(opts, "backend", "serial", &error_abort);
3554 qemu_opt_set(opts, "path", filename, &error_abort);
3555 return opts;
3556 }
3557 if (strstart(filename, "file:", &p)) {
3558 qemu_opt_set(opts, "backend", "file", &error_abort);
3559 qemu_opt_set(opts, "path", p, &error_abort);
3560 return opts;
3561 }
3562 if (strstart(filename, "pipe:", &p)) {
3563 qemu_opt_set(opts, "backend", "pipe", &error_abort);
3564 qemu_opt_set(opts, "path", p, &error_abort);
3565 return opts;
3566 }
3567 if (strstart(filename, "tcp:", &p) ||
3568 strstart(filename, "telnet:", &p)) {
3569 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3570 host[0] = 0;
3571 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3572 goto fail;
3573 }
3574 qemu_opt_set(opts, "backend", "socket", &error_abort);
3575 qemu_opt_set(opts, "host", host, &error_abort);
3576 qemu_opt_set(opts, "port", port, &error_abort);
3577 if (p[pos] == ',') {
3578 qemu_opts_do_parse(opts, p+pos+1, NULL, &local_err);
3579 if (local_err) {
3580 error_report_err(local_err);
3581 goto fail;
3582 }
3583 }
3584 if (strstart(filename, "telnet:", &p))
3585 qemu_opt_set(opts, "telnet", "on", &error_abort);
3586 return opts;
3587 }
3588 if (strstart(filename, "udp:", &p)) {
3589 qemu_opt_set(opts, "backend", "udp", &error_abort);
3590 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3591 host[0] = 0;
3592 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3593 goto fail;
3594 }
3595 }
3596 qemu_opt_set(opts, "host", host, &error_abort);
3597 qemu_opt_set(opts, "port", port, &error_abort);
3598 if (p[pos] == '@') {
3599 p += pos + 1;
3600 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3601 host[0] = 0;
3602 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3603 goto fail;
3604 }
3605 }
3606 qemu_opt_set(opts, "localaddr", host, &error_abort);
3607 qemu_opt_set(opts, "localport", port, &error_abort);
3608 }
3609 return opts;
3610 }
3611 if (strstart(filename, "unix:", &p)) {
3612 qemu_opt_set(opts, "backend", "socket", &error_abort);
3613 qemu_opts_do_parse(opts, p, "path", &local_err);
3614 if (local_err) {
3615 error_report_err(local_err);
3616 goto fail;
3617 }
3618 return opts;
3619 }
3620 if (strstart(filename, "/dev/parport", NULL) ||
3621 strstart(filename, "/dev/ppi", NULL)) {
3622 qemu_opt_set(opts, "backend", "parport", &error_abort);
3623 qemu_opt_set(opts, "path", filename, &error_abort);
3624 return opts;
3625 }
3626 if (strstart(filename, "/dev/", NULL)) {
3627 qemu_opt_set(opts, "backend", "tty", &error_abort);
3628 qemu_opt_set(opts, "path", filename, &error_abort);
3629 return opts;
3630 }
3631
3632 fail:
3633 qemu_opts_del(opts);
3634 return NULL;
3635 }
3636
3637 void qemu_chr_parse_common(QemuOpts *opts, ChardevCommon *backend)
3638 {
3639 const char *logfile = qemu_opt_get(opts, "logfile");
3640
3641 backend->has_logfile = logfile != NULL;
3642 backend->logfile = logfile ? g_strdup(logfile) : NULL;
3643
3644 backend->has_logappend = true;
3645 backend->logappend = qemu_opt_get_bool(opts, "logappend", false);
3646 }
3647
3648
3649 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3650 Error **errp)
3651 {
3652 const char *path = qemu_opt_get(opts, "path");
3653 ChardevFile *file;
3654
3655 if (path == NULL) {
3656 error_setg(errp, "chardev: file: no filename given");
3657 return;
3658 }
3659 file = backend->u.file.data = g_new0(ChardevFile, 1);
3660 qemu_chr_parse_common(opts, qapi_ChardevFile_base(file));
3661 file->out = g_strdup(path);
3662
3663 file->has_append = true;
3664 file->append = qemu_opt_get_bool(opts, "append", false);
3665 }
3666
3667 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3668 Error **errp)
3669 {
3670 ChardevStdio *stdio;
3671
3672 stdio = backend->u.stdio.data = g_new0(ChardevStdio, 1);
3673 qemu_chr_parse_common(opts, qapi_ChardevStdio_base(stdio));
3674 stdio->has_signal = true;
3675 stdio->signal = qemu_opt_get_bool(opts, "signal", true);
3676 }
3677
3678 #ifdef HAVE_CHARDEV_SERIAL
3679 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3680 Error **errp)
3681 {
3682 const char *device = qemu_opt_get(opts, "path");
3683 ChardevHostdev *serial;
3684
3685 if (device == NULL) {
3686 error_setg(errp, "chardev: serial/tty: no device path given");
3687 return;
3688 }
3689 serial = backend->u.serial.data = g_new0(ChardevHostdev, 1);
3690 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(serial));
3691 serial->device = g_strdup(device);
3692 }
3693 #endif
3694
3695 #ifdef HAVE_CHARDEV_PARPORT
3696 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3697 Error **errp)
3698 {
3699 const char *device = qemu_opt_get(opts, "path");
3700 ChardevHostdev *parallel;
3701
3702 if (device == NULL) {
3703 error_setg(errp, "chardev: parallel: no device path given");
3704 return;
3705 }
3706 parallel = backend->u.parallel.data = g_new0(ChardevHostdev, 1);
3707 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(parallel));
3708 parallel->device = g_strdup(device);
3709 }
3710 #endif
3711
3712 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3713 Error **errp)
3714 {
3715 const char *device = qemu_opt_get(opts, "path");
3716 ChardevHostdev *dev;
3717
3718 if (device == NULL) {
3719 error_setg(errp, "chardev: pipe: no device path given");
3720 return;
3721 }
3722 dev = backend->u.pipe.data = g_new0(ChardevHostdev, 1);
3723 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(dev));
3724 dev->device = g_strdup(device);
3725 }
3726
3727 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3728 Error **errp)
3729 {
3730 int val;
3731 ChardevRingbuf *ringbuf;
3732
3733 ringbuf = backend->u.ringbuf.data = g_new0(ChardevRingbuf, 1);
3734 qemu_chr_parse_common(opts, qapi_ChardevRingbuf_base(ringbuf));
3735
3736 val = qemu_opt_get_size(opts, "size", 0);
3737 if (val != 0) {
3738 ringbuf->has_size = true;
3739 ringbuf->size = val;
3740 }
3741 }
3742
3743 static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
3744 Error **errp)
3745 {
3746 const char *chardev = qemu_opt_get(opts, "chardev");
3747 ChardevMux *mux;
3748
3749 if (chardev == NULL) {
3750 error_setg(errp, "chardev: mux: no chardev given");
3751 return;
3752 }
3753 mux = backend->u.mux.data = g_new0(ChardevMux, 1);
3754 qemu_chr_parse_common(opts, qapi_ChardevMux_base(mux));
3755 mux->chardev = g_strdup(chardev);
3756 }
3757
3758 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
3759 Error **errp)
3760 {
3761 bool is_listen = qemu_opt_get_bool(opts, "server", false);
3762 bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true);
3763 bool is_telnet = qemu_opt_get_bool(opts, "telnet", false);
3764 bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true);
3765 int64_t reconnect = qemu_opt_get_number(opts, "reconnect", 0);
3766 const char *path = qemu_opt_get(opts, "path");
3767 const char *host = qemu_opt_get(opts, "host");
3768 const char *port = qemu_opt_get(opts, "port");
3769 const char *tls_creds = qemu_opt_get(opts, "tls-creds");
3770 SocketAddress *addr;
3771 ChardevSocket *sock;
3772
3773 if (!path) {
3774 if (!host) {
3775 error_setg(errp, "chardev: socket: no host given");
3776 return;
3777 }
3778 if (!port) {
3779 error_setg(errp, "chardev: socket: no port given");
3780 return;
3781 }
3782 } else {
3783 if (tls_creds) {
3784 error_setg(errp, "TLS can only be used over TCP socket");
3785 return;
3786 }
3787 }
3788
3789 sock = backend->u.socket.data = g_new0(ChardevSocket, 1);
3790 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock));
3791
3792 sock->has_nodelay = true;
3793 sock->nodelay = do_nodelay;
3794 sock->has_server = true;
3795 sock->server = is_listen;
3796 sock->has_telnet = true;
3797 sock->telnet = is_telnet;
3798 sock->has_wait = true;
3799 sock->wait = is_waitconnect;
3800 sock->has_reconnect = true;
3801 sock->reconnect = reconnect;
3802 sock->tls_creds = g_strdup(tls_creds);
3803
3804 addr = g_new0(SocketAddress, 1);
3805 if (path) {
3806 UnixSocketAddress *q_unix;
3807 addr->type = SOCKET_ADDRESS_KIND_UNIX;
3808 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1);
3809 q_unix->path = g_strdup(path);
3810 } else {
3811 addr->type = SOCKET_ADDRESS_KIND_INET;
3812 addr->u.inet.data = g_new(InetSocketAddress, 1);
3813 *addr->u.inet.data = (InetSocketAddress) {
3814 .host = g_strdup(host),
3815 .port = g_strdup(port),
3816 .has_to = qemu_opt_get(opts, "to"),
3817 .to = qemu_opt_get_number(opts, "to", 0),
3818 .has_ipv4 = qemu_opt_get(opts, "ipv4"),
3819 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0),
3820 .has_ipv6 = qemu_opt_get(opts, "ipv6"),
3821 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0),
3822 };
3823 }
3824 sock->addr = addr;
3825 }
3826
3827 static void qemu_chr_parse_udp(QemuOpts *opts, ChardevBackend *backend,
3828 Error **errp)
3829 {
3830 const char *host = qemu_opt_get(opts, "host");
3831 const char *port = qemu_opt_get(opts, "port");
3832 const char *localaddr = qemu_opt_get(opts, "localaddr");
3833 const char *localport = qemu_opt_get(opts, "localport");
3834 bool has_local = false;
3835 SocketAddress *addr;
3836 ChardevUdp *udp;
3837
3838 if (host == NULL || strlen(host) == 0) {
3839 host = "localhost";
3840 }
3841 if (port == NULL || strlen(port) == 0) {
3842 error_setg(errp, "chardev: udp: remote port not specified");
3843 return;
3844 }
3845 if (localport == NULL || strlen(localport) == 0) {
3846 localport = "0";
3847 } else {
3848 has_local = true;
3849 }
3850 if (localaddr == NULL || strlen(localaddr) == 0) {
3851 localaddr = "";
3852 } else {
3853 has_local = true;
3854 }
3855
3856 udp = backend->u.udp.data = g_new0(ChardevUdp, 1);
3857 qemu_chr_parse_common(opts, qapi_ChardevUdp_base(udp));
3858
3859 addr = g_new0(SocketAddress, 1);
3860 addr->type = SOCKET_ADDRESS_KIND_INET;
3861 addr->u.inet.data = g_new(InetSocketAddress, 1);
3862 *addr->u.inet.data = (InetSocketAddress) {
3863 .host = g_strdup(host),
3864 .port = g_strdup(port),
3865 .has_ipv4 = qemu_opt_get(opts, "ipv4"),
3866 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0),
3867 .has_ipv6 = qemu_opt_get(opts, "ipv6"),
3868 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0),
3869 };
3870 udp->remote = addr;
3871
3872 if (has_local) {
3873 udp->has_local = true;
3874 addr = g_new0(SocketAddress, 1);
3875 addr->type = SOCKET_ADDRESS_KIND_INET;
3876 addr->u.inet.data = g_new(InetSocketAddress, 1);
3877 *addr->u.inet.data = (InetSocketAddress) {
3878 .host = g_strdup(localaddr),
3879 .port = g_strdup(localport),
3880 };
3881 udp->local = addr;
3882 }
3883 }
3884
3885 typedef struct CharDriver {
3886 const char *name;
3887 ChardevBackendKind kind;
3888 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3889 CharDriverState *(*create)(const char *id, ChardevBackend *backend,
3890 ChardevReturn *ret, Error **errp);
3891 } CharDriver;
3892
3893 static GSList *backends;
3894
3895 void register_char_driver(const char *name, ChardevBackendKind kind,
3896 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp),
3897 CharDriverState *(*create)(const char *id, ChardevBackend *backend,
3898 ChardevReturn *ret, Error **errp))
3899 {
3900 CharDriver *s;
3901
3902 s = g_malloc0(sizeof(*s));
3903 s->name = g_strdup(name);
3904 s->kind = kind;
3905 s->parse = parse;
3906 s->create = create;
3907
3908 backends = g_slist_append(backends, s);
3909 }
3910
3911 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3912 Error **errp)
3913 {
3914 Error *local_err = NULL;
3915 CharDriver *cd;
3916 CharDriverState *chr;
3917 GSList *i;
3918 ChardevReturn *ret = NULL;
3919 ChardevBackend *backend;
3920 const char *id = qemu_opts_id(opts);
3921 char *bid = NULL;
3922
3923 if (qemu_opt_get(opts, "backend") == NULL) {
3924 error_setg(errp, "chardev: \"%s\" missing backend",
3925 qemu_opts_id(opts));
3926 goto err;
3927 }
3928
3929 if (is_help_option(qemu_opt_get(opts, "backend"))) {
3930 fprintf(stderr, "Available chardev backend types:\n");
3931 for (i = backends; i; i = i->next) {
3932 cd = i->data;
3933 fprintf(stderr, "%s\n", cd->name);
3934 }
3935 exit(!is_help_option(qemu_opt_get(opts, "backend")));
3936 }
3937
3938 if (id == NULL) {
3939 error_setg(errp, "chardev: no id specified");
3940 goto err;
3941 }
3942
3943 for (i = backends; i; i = i->next) {
3944 cd = i->data;
3945
3946 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3947 break;
3948 }
3949 }
3950 if (i == NULL) {
3951 error_setg(errp, "chardev: backend \"%s\" not found",
3952 qemu_opt_get(opts, "backend"));
3953 goto err;
3954 }
3955
3956 backend = g_new0(ChardevBackend, 1);
3957
3958 if (qemu_opt_get_bool(opts, "mux", 0)) {
3959 bid = g_strdup_printf("%s-base", id);
3960 }
3961
3962 chr = NULL;
3963 backend->type = cd->kind;
3964 if (cd->parse) {
3965 cd->parse(opts, backend, &local_err);
3966 if (local_err) {
3967 error_propagate(errp, local_err);
3968 goto qapi_out;
3969 }
3970 } else {
3971 ChardevCommon *cc = g_new0(ChardevCommon, 1);
3972 qemu_chr_parse_common(opts, cc);
3973 backend->u.null.data = cc; /* Any ChardevCommon member would work */
3974 }
3975
3976 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3977 if (!ret) {
3978 goto qapi_out;
3979 }
3980
3981 if (bid) {
3982 qapi_free_ChardevBackend(backend);
3983 qapi_free_ChardevReturn(ret);
3984 backend = g_new0(ChardevBackend, 1);
3985 backend->u.mux.data = g_new0(ChardevMux, 1);
3986 backend->type = CHARDEV_BACKEND_KIND_MUX;
3987 backend->u.mux.data->chardev = g_strdup(bid);
3988 ret = qmp_chardev_add(id, backend, errp);
3989 if (!ret) {
3990 chr = qemu_chr_find(bid);
3991 qemu_chr_delete(chr);
3992 chr = NULL;
3993 goto qapi_out;
3994 }
3995 }
3996
3997 chr = qemu_chr_find(id);
3998
3999 qapi_out:
4000 qapi_free_ChardevBackend(backend);
4001 qapi_free_ChardevReturn(ret);
4002 g_free(bid);
4003 return chr;
4004
4005 err:
4006 return NULL;
4007 }
4008
4009 CharDriverState *qemu_chr_new_noreplay(const char *label, const char *filename)
4010 {
4011 const char *p;
4012 CharDriverState *chr;
4013 QemuOpts *opts;
4014 Error *err = NULL;
4015
4016 if (strstart(filename, "chardev:", &p)) {
4017 return qemu_chr_find(p);
4018 }
4019
4020 opts = qemu_chr_parse_compat(label, filename);
4021 if (!opts)
4022 return NULL;
4023
4024 chr = qemu_chr_new_from_opts(opts, &err);
4025 if (err) {
4026 error_report_err(err);
4027 }
4028 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
4029 qemu_chr_fe_claim_no_fail(chr);
4030 monitor_init(chr, MONITOR_USE_READLINE);
4031 }
4032 qemu_opts_del(opts);
4033 return chr;
4034 }
4035
4036 CharDriverState *qemu_chr_new(const char *label, const char *filename)
4037 {
4038 CharDriverState *chr;
4039 chr = qemu_chr_new_noreplay(label, filename);
4040 if (chr) {
4041 chr->replay = replay_mode != REPLAY_MODE_NONE;
4042 if (chr->replay && chr->chr_ioctl) {
4043 fprintf(stderr,
4044 "Replay: ioctl is not supported for serial devices yet\n");
4045 }
4046 replay_register_char_driver(chr);
4047 }
4048 return chr;
4049 }
4050
4051 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
4052 {
4053 if (chr->chr_set_echo) {
4054 chr->chr_set_echo(chr, echo);
4055 }
4056 }
4057
4058 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
4059 {
4060 if (chr->fe_open == fe_open) {
4061 return;
4062 }
4063 chr->fe_open = fe_open;
4064 if (chr->chr_set_fe_open) {
4065 chr->chr_set_fe_open(chr, fe_open);
4066 }
4067 }
4068
4069 void qemu_chr_fe_event(struct CharDriverState *chr, int event)
4070 {
4071 if (chr->chr_fe_event) {
4072 chr->chr_fe_event(chr, event);
4073 }
4074 }
4075
4076 guint qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
4077 GIOFunc func, void *user_data)
4078 {
4079 GSource *src;
4080 guint tag;
4081
4082 if (s->chr_add_watch == NULL) {
4083 return 0;
4084 }
4085
4086 src = s->chr_add_watch(s, cond);
4087 if (!src) {
4088 return 0;
4089 }
4090
4091 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
4092 tag = g_source_attach(src, NULL);
4093 g_source_unref(src);
4094
4095 return tag;
4096 }
4097
4098 int qemu_chr_fe_claim(CharDriverState *s)
4099 {
4100 if (s->avail_connections < 1) {
4101 return -1;
4102 }
4103 s->avail_connections--;
4104 return 0;
4105 }
4106
4107 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
4108 {
4109 if (qemu_chr_fe_claim(s) != 0) {
4110 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
4111 __func__, s->label);
4112 exit(1);
4113 }
4114 }
4115
4116 void qemu_chr_fe_release(CharDriverState *s)
4117 {
4118 s->avail_connections++;
4119 }
4120
4121 void qemu_chr_disconnect(CharDriverState *chr)
4122 {
4123 if (chr->chr_disconnect) {
4124 chr->chr_disconnect(chr);
4125 }
4126 }
4127
4128 static void qemu_chr_free_common(CharDriverState *chr)
4129 {
4130 g_free(chr->filename);
4131 g_free(chr->label);
4132 if (chr->logfd != -1) {
4133 close(chr->logfd);
4134 }
4135 qemu_mutex_destroy(&chr->chr_write_lock);
4136 g_free(chr);
4137 }
4138
4139 void qemu_chr_free(CharDriverState *chr)
4140 {
4141 if (chr->chr_close) {
4142 chr->chr_close(chr);
4143 }
4144 qemu_chr_free_common(chr);
4145 }
4146
4147 void qemu_chr_delete(CharDriverState *chr)
4148 {
4149 QTAILQ_REMOVE(&chardevs, chr, next);
4150 qemu_chr_free(chr);
4151 }
4152
4153 ChardevInfoList *qmp_query_chardev(Error **errp)
4154 {
4155 ChardevInfoList *chr_list = NULL;
4156 CharDriverState *chr;
4157
4158 QTAILQ_FOREACH(chr, &chardevs, next) {
4159 ChardevInfoList *info = g_malloc0(sizeof(*info));
4160 info->value = g_malloc0(sizeof(*info->value));
4161 info->value->label = g_strdup(chr->label);
4162 info->value->filename = g_strdup(chr->filename);
4163 info->value->frontend_open = chr->fe_open;
4164
4165 info->next = chr_list;
4166 chr_list = info;
4167 }
4168
4169 return chr_list;
4170 }
4171
4172 ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp)
4173 {
4174 ChardevBackendInfoList *backend_list = NULL;
4175 CharDriver *c = NULL;
4176 GSList *i = NULL;
4177
4178 for (i = backends; i; i = i->next) {
4179 ChardevBackendInfoList *info = g_malloc0(sizeof(*info));
4180 c = i->data;
4181 info->value = g_malloc0(sizeof(*info->value));
4182 info->value->name = g_strdup(c->name);
4183
4184 info->next = backend_list;
4185 backend_list = info;
4186 }
4187
4188 return backend_list;
4189 }
4190
4191 CharDriverState *qemu_chr_find(const char *name)
4192 {
4193 CharDriverState *chr;
4194
4195 QTAILQ_FOREACH(chr, &chardevs, next) {
4196 if (strcmp(chr->label, name) != 0)
4197 continue;
4198 return chr;
4199 }
4200 return NULL;
4201 }
4202
4203 QemuOptsList qemu_chardev_opts = {
4204 .name = "chardev",
4205 .implied_opt_name = "backend",
4206 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
4207 .desc = {
4208 {
4209 .name = "backend",
4210 .type = QEMU_OPT_STRING,
4211 },{
4212 .name = "path",
4213 .type = QEMU_OPT_STRING,
4214 },{
4215 .name = "host",
4216 .type = QEMU_OPT_STRING,
4217 },{
4218 .name = "port",
4219 .type = QEMU_OPT_STRING,
4220 },{
4221 .name = "localaddr",
4222 .type = QEMU_OPT_STRING,
4223 },{
4224 .name = "localport",
4225 .type = QEMU_OPT_STRING,
4226 },{
4227 .name = "to",
4228 .type = QEMU_OPT_NUMBER,
4229 },{
4230 .name = "ipv4",
4231 .type = QEMU_OPT_BOOL,
4232 },{
4233 .name = "ipv6",
4234 .type = QEMU_OPT_BOOL,
4235 },{
4236 .name = "wait",
4237 .type = QEMU_OPT_BOOL,
4238 },{
4239 .name = "server",
4240 .type = QEMU_OPT_BOOL,
4241 },{
4242 .name = "delay",
4243 .type = QEMU_OPT_BOOL,
4244 },{
4245 .name = "reconnect",
4246 .type = QEMU_OPT_NUMBER,
4247 },{
4248 .name = "telnet",
4249 .type = QEMU_OPT_BOOL,
4250 },{
4251 .name = "tls-creds",
4252 .type = QEMU_OPT_STRING,
4253 },{
4254 .name = "width",
4255 .type = QEMU_OPT_NUMBER,
4256 },{
4257 .name = "height",
4258 .type = QEMU_OPT_NUMBER,
4259 },{
4260 .name = "cols",
4261 .type = QEMU_OPT_NUMBER,
4262 },{
4263 .name = "rows",
4264 .type = QEMU_OPT_NUMBER,
4265 },{
4266 .name = "mux",
4267 .type = QEMU_OPT_BOOL,
4268 },{
4269 .name = "signal",
4270 .type = QEMU_OPT_BOOL,
4271 },{
4272 .name = "name",
4273 .type = QEMU_OPT_STRING,
4274 },{
4275 .name = "debug",
4276 .type = QEMU_OPT_NUMBER,
4277 },{
4278 .name = "size",
4279 .type = QEMU_OPT_SIZE,
4280 },{
4281 .name = "chardev",
4282 .type = QEMU_OPT_STRING,
4283 },{
4284 .name = "append",
4285 .type = QEMU_OPT_BOOL,
4286 },{
4287 .name = "logfile",
4288 .type = QEMU_OPT_STRING,
4289 },{
4290 .name = "logappend",
4291 .type = QEMU_OPT_BOOL,
4292 },
4293 { /* end of list */ }
4294 },
4295 };
4296
4297 #ifdef _WIN32
4298
4299 static CharDriverState *qmp_chardev_open_file(const char *id,
4300 ChardevBackend *backend,
4301 ChardevReturn *ret,
4302 Error **errp)
4303 {
4304 ChardevFile *file = backend->u.file.data;
4305 ChardevCommon *common = qapi_ChardevFile_base(file);
4306 HANDLE out;
4307 DWORD accessmode;
4308 DWORD flags;
4309
4310 if (file->has_in) {
4311 error_setg(errp, "input file not supported");
4312 return NULL;
4313 }
4314
4315 if (file->has_append && file->append) {
4316 /* Append to file if it already exists. */
4317 accessmode = FILE_GENERIC_WRITE & ~FILE_WRITE_DATA;
4318 flags = OPEN_ALWAYS;
4319 } else {
4320 /* Truncate file if it already exists. */
4321 accessmode = GENERIC_WRITE;
4322 flags = CREATE_ALWAYS;
4323 }
4324
4325 out = CreateFile(file->out, accessmode, FILE_SHARE_READ, NULL, flags,
4326 FILE_ATTRIBUTE_NORMAL, NULL);
4327 if (out == INVALID_HANDLE_VALUE) {
4328 error_setg(errp, "open %s failed", file->out);
4329 return NULL;
4330 }
4331 return qemu_chr_open_win_file(out, common, errp);
4332 }
4333
4334 static CharDriverState *qmp_chardev_open_serial(const char *id,
4335 ChardevBackend *backend,
4336 ChardevReturn *ret,
4337 Error **errp)
4338 {
4339 ChardevHostdev *serial = backend->u.serial.data;
4340 ChardevCommon *common = qapi_ChardevHostdev_base(serial);
4341 return qemu_chr_open_win_path(serial->device, common, errp);
4342 }
4343
4344 #else /* WIN32 */
4345
4346 static int qmp_chardev_open_file_source(char *src, int flags,
4347 Error **errp)
4348 {
4349 int fd = -1;
4350
4351 TFR(fd = qemu_open(src, flags, 0666));
4352 if (fd == -1) {
4353 error_setg_file_open(errp, errno, src);
4354 }
4355 return fd;
4356 }
4357
4358 static CharDriverState *qmp_chardev_open_file(const char *id,
4359 ChardevBackend *backend,
4360 ChardevReturn *ret,
4361 Error **errp)
4362 {
4363 ChardevFile *file = backend->u.file.data;
4364 ChardevCommon *common = qapi_ChardevFile_base(file);
4365 int flags, in = -1, out;
4366
4367 flags = O_WRONLY | O_CREAT | O_BINARY;
4368 if (file->has_append && file->append) {
4369 flags |= O_APPEND;
4370 } else {
4371 flags |= O_TRUNC;
4372 }
4373
4374 out = qmp_chardev_open_file_source(file->out, flags, errp);
4375 if (out < 0) {
4376 return NULL;
4377 }
4378
4379 if (file->has_in) {
4380 flags = O_RDONLY;
4381 in = qmp_chardev_open_file_source(file->in, flags, errp);
4382 if (in < 0) {
4383 qemu_close(out);
4384 return NULL;
4385 }
4386 }
4387
4388 return qemu_chr_open_fd(in, out, common, errp);
4389 }
4390
4391 #ifdef HAVE_CHARDEV_SERIAL
4392 static CharDriverState *qmp_chardev_open_serial(const char *id,
4393 ChardevBackend *backend,
4394 ChardevReturn *ret,
4395 Error **errp)
4396 {
4397 ChardevHostdev *serial = backend->u.serial.data;
4398 ChardevCommon *common = qapi_ChardevHostdev_base(serial);
4399 int fd;
4400
4401 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
4402 if (fd < 0) {
4403 return NULL;
4404 }
4405 qemu_set_nonblock(fd);
4406 return qemu_chr_open_tty_fd(fd, common, errp);
4407 }
4408 #endif
4409
4410 #ifdef HAVE_CHARDEV_PARPORT
4411 static CharDriverState *qmp_chardev_open_parallel(const char *id,
4412 ChardevBackend *backend,
4413 ChardevReturn *ret,
4414 Error **errp)
4415 {
4416 ChardevHostdev *parallel = backend->u.parallel.data;
4417 ChardevCommon *common = qapi_ChardevHostdev_base(parallel);
4418 int fd;
4419
4420 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
4421 if (fd < 0) {
4422 return NULL;
4423 }
4424 return qemu_chr_open_pp_fd(fd, common, errp);
4425 }
4426 #endif
4427
4428 #endif /* WIN32 */
4429
4430 static gboolean socket_reconnect_timeout(gpointer opaque)
4431 {
4432 CharDriverState *chr = opaque;
4433 TCPCharDriver *s = chr->opaque;
4434 QIOChannelSocket *sioc;
4435
4436 s->reconnect_timer = 0;
4437
4438 if (chr->be_open) {
4439 return false;
4440 }
4441
4442 sioc = qio_channel_socket_new();
4443 qio_channel_socket_connect_async(sioc, s->addr,
4444 qemu_chr_socket_connected,
4445 chr, NULL);
4446
4447 return false;
4448 }
4449
4450 static CharDriverState *qmp_chardev_open_socket(const char *id,
4451 ChardevBackend *backend,
4452 ChardevReturn *ret,
4453 Error **errp)
4454 {
4455 CharDriverState *chr;
4456 TCPCharDriver *s;
4457 ChardevSocket *sock = backend->u.socket.data;
4458 SocketAddress *addr = sock->addr;
4459 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
4460 bool is_listen = sock->has_server ? sock->server : true;
4461 bool is_telnet = sock->has_telnet ? sock->telnet : false;
4462 bool is_waitconnect = sock->has_wait ? sock->wait : false;
4463 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0;
4464 ChardevCommon *common = qapi_ChardevSocket_base(sock);
4465 QIOChannelSocket *sioc = NULL;
4466
4467 chr = qemu_chr_alloc(common, errp);
4468 if (!chr) {
4469 return NULL;
4470 }
4471 s = g_new0(TCPCharDriver, 1);
4472
4473 s->is_unix = addr->type == SOCKET_ADDRESS_KIND_UNIX;
4474 s->is_listen = is_listen;
4475 s->is_telnet = is_telnet;
4476 s->do_nodelay = do_nodelay;
4477 if (sock->tls_creds) {
4478 Object *creds;
4479 creds = object_resolve_path_component(
4480 object_get_objects_root(), sock->tls_creds);
4481 if (!creds) {
4482 error_setg(errp, "No TLS credentials with id '%s'",
4483 sock->tls_creds);
4484 goto error;
4485 }
4486 s->tls_creds = (QCryptoTLSCreds *)
4487 object_dynamic_cast(creds,
4488 TYPE_QCRYPTO_TLS_CREDS);
4489 if (!s->tls_creds) {
4490 error_setg(errp, "Object with id '%s' is not TLS credentials",
4491 sock->tls_creds);
4492 goto error;
4493 }
4494 object_ref(OBJECT(s->tls_creds));
4495 if (is_listen) {
4496 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
4497 error_setg(errp, "%s",
4498 "Expected TLS credentials for server endpoint");
4499 goto error;
4500 }
4501 } else {
4502 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) {
4503 error_setg(errp, "%s",
4504 "Expected TLS credentials for client endpoint");
4505 goto error;
4506 }
4507 }
4508 }
4509
4510 s->addr = QAPI_CLONE(SocketAddress, sock->addr);
4511
4512 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE);
4513 if (s->is_unix) {
4514 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS);
4515 }
4516
4517 chr->opaque = s;
4518 chr->chr_wait_connected = tcp_chr_wait_connected;
4519 chr->chr_write = tcp_chr_write;
4520 chr->chr_sync_read = tcp_chr_sync_read;
4521 chr->chr_close = tcp_chr_close;
4522 chr->chr_disconnect = tcp_chr_disconnect;
4523 chr->get_msgfds = tcp_get_msgfds;
4524 chr->set_msgfds = tcp_set_msgfds;
4525 chr->chr_add_client = tcp_chr_add_client;
4526 chr->chr_add_watch = tcp_chr_add_watch;
4527 chr->chr_update_read_handler = tcp_chr_update_read_handler;
4528 /* be isn't opened until we get a connection */
4529 chr->explicit_be_open = true;
4530
4531 chr->filename = SocketAddress_to_str("disconnected:",
4532 addr, is_listen, is_telnet);
4533
4534 if (is_listen) {
4535 if (is_telnet) {
4536 s->do_telnetopt = 1;
4537 }
4538 } else if (reconnect > 0) {
4539 s->reconnect_time = reconnect;
4540 }
4541
4542 if (s->reconnect_time) {
4543 sioc = qio_channel_socket_new();
4544 qio_channel_socket_connect_async(sioc, s->addr,
4545 qemu_chr_socket_connected,
4546 chr, NULL);
4547 } else {
4548 if (s->is_listen) {
4549 sioc = qio_channel_socket_new();
4550 if (qio_channel_socket_listen_sync(sioc, s->addr, errp) < 0) {
4551 goto error;
4552 }
4553 s->listen_ioc = sioc;
4554 if (is_waitconnect &&
4555 qemu_chr_wait_connected(chr, errp) < 0) {
4556 goto error;
4557 }
4558 if (!s->ioc) {
4559 s->listen_tag = qio_channel_add_watch(
4560 QIO_CHANNEL(s->listen_ioc), G_IO_IN,
4561 tcp_chr_accept, chr, NULL);
4562 }
4563 } else if (qemu_chr_wait_connected(chr, errp) < 0) {
4564 goto error;
4565 }
4566 }
4567
4568 return chr;
4569
4570 error:
4571 if (sioc) {
4572 object_unref(OBJECT(sioc));
4573 }
4574 if (s->tls_creds) {
4575 object_unref(OBJECT(s->tls_creds));
4576 }
4577 g_free(s);
4578 qemu_chr_free_common(chr);
4579 return NULL;
4580 }
4581
4582 static CharDriverState *qmp_chardev_open_udp(const char *id,
4583 ChardevBackend *backend,
4584 ChardevReturn *ret,
4585 Error **errp)
4586 {
4587 ChardevUdp *udp = backend->u.udp.data;
4588 ChardevCommon *common = qapi_ChardevUdp_base(udp);
4589 QIOChannelSocket *sioc = qio_channel_socket_new();
4590
4591 if (qio_channel_socket_dgram_sync(sioc,
4592 udp->local, udp->remote,
4593 errp) < 0) {
4594 object_unref(OBJECT(sioc));
4595 return NULL;
4596 }
4597 return qemu_chr_open_udp(sioc, common, errp);
4598 }
4599
4600
4601 bool qemu_chr_has_feature(CharDriverState *chr,
4602 CharDriverFeature feature)
4603 {
4604 return test_bit(feature, chr->features);
4605 }
4606
4607 void qemu_chr_set_feature(CharDriverState *chr,
4608 CharDriverFeature feature)
4609 {
4610 return set_bit(feature, chr->features);
4611 }
4612
4613 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
4614 Error **errp)
4615 {
4616 ChardevReturn *ret = g_new0(ChardevReturn, 1);
4617 CharDriverState *chr = NULL;
4618 Error *local_err = NULL;
4619 GSList *i;
4620 CharDriver *cd;
4621
4622 chr = qemu_chr_find(id);
4623 if (chr) {
4624 error_setg(errp, "Chardev '%s' already exists", id);
4625 g_free(ret);
4626 return NULL;
4627 }
4628
4629 for (i = backends; i; i = i->next) {
4630 cd = i->data;
4631
4632 if (cd->kind == backend->type) {
4633 chr = cd->create(id, backend, ret, &local_err);
4634 if (local_err) {
4635 error_propagate(errp, local_err);
4636 goto out_error;
4637 }
4638 break;
4639 }
4640 }
4641
4642 if (chr == NULL) {
4643 assert(!i);
4644 error_setg(errp, "chardev backend not available");
4645 goto out_error;
4646 }
4647
4648 chr->label = g_strdup(id);
4649 chr->avail_connections =
4650 (backend->type == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
4651 if (!chr->filename) {
4652 chr->filename = g_strdup(ChardevBackendKind_lookup[backend->type]);
4653 }
4654 if (!chr->explicit_be_open) {
4655 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
4656 }
4657 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
4658 return ret;
4659
4660 out_error:
4661 g_free(ret);
4662 return NULL;
4663 }
4664
4665 void qmp_chardev_remove(const char *id, Error **errp)
4666 {
4667 CharDriverState *chr;
4668
4669 chr = qemu_chr_find(id);
4670 if (chr == NULL) {
4671 error_setg(errp, "Chardev '%s' not found", id);
4672 return;
4673 }
4674 if (chr->chr_can_read || chr->chr_read ||
4675 chr->chr_event || chr->handler_opaque) {
4676 error_setg(errp, "Chardev '%s' is busy", id);
4677 return;
4678 }
4679 if (chr->replay) {
4680 error_setg(errp,
4681 "Chardev '%s' cannot be unplugged in record/replay mode", id);
4682 return;
4683 }
4684 qemu_chr_delete(chr);
4685 }
4686
4687 void qemu_chr_cleanup(void)
4688 {
4689 CharDriverState *chr, *tmp;
4690
4691 QTAILQ_FOREACH_SAFE(chr, &chardevs, next, tmp) {
4692 qemu_chr_delete(chr);
4693 }
4694 }
4695
4696 static void register_types(void)
4697 {
4698 register_char_driver("null", CHARDEV_BACKEND_KIND_NULL, NULL,
4699 qemu_chr_open_null);
4700 register_char_driver("socket", CHARDEV_BACKEND_KIND_SOCKET,
4701 qemu_chr_parse_socket, qmp_chardev_open_socket);
4702 register_char_driver("udp", CHARDEV_BACKEND_KIND_UDP, qemu_chr_parse_udp,
4703 qmp_chardev_open_udp);
4704 register_char_driver("ringbuf", CHARDEV_BACKEND_KIND_RINGBUF,
4705 qemu_chr_parse_ringbuf, qemu_chr_open_ringbuf);
4706 register_char_driver("file", CHARDEV_BACKEND_KIND_FILE,
4707 qemu_chr_parse_file_out, qmp_chardev_open_file);
4708 register_char_driver("stdio", CHARDEV_BACKEND_KIND_STDIO,
4709 qemu_chr_parse_stdio, qemu_chr_open_stdio);
4710 #if defined HAVE_CHARDEV_SERIAL
4711 register_char_driver("serial", CHARDEV_BACKEND_KIND_SERIAL,
4712 qemu_chr_parse_serial, qmp_chardev_open_serial);
4713 register_char_driver("tty", CHARDEV_BACKEND_KIND_SERIAL,
4714 qemu_chr_parse_serial, qmp_chardev_open_serial);
4715 #endif
4716 #ifdef HAVE_CHARDEV_PARPORT
4717 register_char_driver("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
4718 qemu_chr_parse_parallel, qmp_chardev_open_parallel);
4719 register_char_driver("parport", CHARDEV_BACKEND_KIND_PARALLEL,
4720 qemu_chr_parse_parallel, qmp_chardev_open_parallel);
4721 #endif
4722 #ifdef HAVE_CHARDEV_PTY
4723 register_char_driver("pty", CHARDEV_BACKEND_KIND_PTY, NULL,
4724 qemu_chr_open_pty);
4725 #endif
4726 #ifdef _WIN32
4727 register_char_driver("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL,
4728 qemu_chr_open_win_con);
4729 #endif
4730 register_char_driver("pipe", CHARDEV_BACKEND_KIND_PIPE,
4731 qemu_chr_parse_pipe, qemu_chr_open_pipe);
4732 register_char_driver("mux", CHARDEV_BACKEND_KIND_MUX, qemu_chr_parse_mux,
4733 qemu_chr_open_mux);
4734 /* Bug-compatibility: */
4735 register_char_driver("memory", CHARDEV_BACKEND_KIND_MEMORY,
4736 qemu_chr_parse_ringbuf, qemu_chr_open_ringbuf);
4737 /* this must be done after machine init, since we register FEs with muxes
4738 * as part of realize functions like serial_isa_realizefn when -nographic
4739 * is specified
4740 */
4741 qemu_add_machine_init_done_notifier(&muxes_realize_notify);
4742 }
4743
4744 type_init(register_types);
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