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char: replace qemu_chr_claim/release with qemu_chr_fe_init/deinit
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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
92typedef struct MuxDriver MuxDriver;
93
94/***********************************************************/
95/* Socket address helpers */
96
97static char *SocketAddress_to_str(const char *prefix, SocketAddress *addr,
98 bool is_listen, bool is_telnet)
99{
100 switch (addr->type) {
101 case SOCKET_ADDRESS_KIND_INET:
102 return g_strdup_printf("%s%s:%s:%s%s", prefix,
103 is_telnet ? "telnet" : "tcp",
104 addr->u.inet.data->host,
105 addr->u.inet.data->port,
106 is_listen ? ",server" : "");
107 break;
108 case SOCKET_ADDRESS_KIND_UNIX:
109 return g_strdup_printf("%sunix:%s%s", prefix,
110 addr->u.q_unix.data->path,
111 is_listen ? ",server" : "");
112 break;
113 case SOCKET_ADDRESS_KIND_FD:
114 return g_strdup_printf("%sfd:%s%s", prefix, addr->u.fd.data->str,
115 is_listen ? ",server" : "");
116 break;
117 default:
118 abort();
119 }
120}
121
122static char *sockaddr_to_str(struct sockaddr_storage *ss, socklen_t ss_len,
123 struct sockaddr_storage *ps, socklen_t ps_len,
124 bool is_listen, bool is_telnet)
125{
126 char shost[NI_MAXHOST], sserv[NI_MAXSERV];
127 char phost[NI_MAXHOST], pserv[NI_MAXSERV];
128 const char *left = "", *right = "";
129
130 switch (ss->ss_family) {
131#ifndef _WIN32
132 case AF_UNIX:
133 return g_strdup_printf("unix:%s%s",
134 ((struct sockaddr_un *)(ss))->sun_path,
135 is_listen ? ",server" : "");
136#endif
137 case AF_INET6:
138 left = "[";
139 right = "]";
140 /* fall through */
141 case AF_INET:
142 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost),
143 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV);
144 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost),
145 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV);
146 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s",
147 is_telnet ? "telnet" : "tcp",
148 left, shost, right, sserv,
149 is_listen ? ",server" : "",
150 left, phost, right, pserv);
151
152 default:
153 return g_strdup_printf("unknown");
154 }
155}
156
157/***********************************************************/
158/* character device */
159
160static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
161 QTAILQ_HEAD_INITIALIZER(chardevs);
162
163static void qemu_chr_free_common(CharDriverState *chr);
164
165CharDriverState *qemu_chr_alloc(ChardevCommon *backend, Error **errp)
166{
167 CharDriverState *chr = g_malloc0(sizeof(CharDriverState));
168 qemu_mutex_init(&chr->chr_write_lock);
169
170 if (backend->has_logfile) {
171 int flags = O_WRONLY | O_CREAT;
172 if (backend->has_logappend &&
173 backend->logappend) {
174 flags |= O_APPEND;
175 } else {
176 flags |= O_TRUNC;
177 }
178 chr->logfd = qemu_open(backend->logfile, flags, 0666);
179 if (chr->logfd < 0) {
180 error_setg_errno(errp, errno,
181 "Unable to open logfile %s",
182 backend->logfile);
183 g_free(chr);
184 return NULL;
185 }
186 } else {
187 chr->logfd = -1;
188 }
189
190 return chr;
191}
192
193void qemu_chr_be_event(CharDriverState *s, int event)
194{
195 /* Keep track if the char device is open */
196 switch (event) {
197 case CHR_EVENT_OPENED:
198 s->be_open = 1;
199 break;
200 case CHR_EVENT_CLOSED:
201 s->be_open = 0;
202 break;
203 }
204
205 if (!s->chr_event)
206 return;
207 s->chr_event(s->handler_opaque, event);
208}
209
210void qemu_chr_be_generic_open(CharDriverState *s)
211{
212 qemu_chr_be_event(s, CHR_EVENT_OPENED);
213}
214
215
216/* Not reporting errors from writing to logfile, as logs are
217 * defined to be "best effort" only */
218static void qemu_chr_fe_write_log(CharDriverState *s,
219 const uint8_t *buf, size_t len)
220{
221 size_t done = 0;
222 ssize_t ret;
223
224 if (s->logfd < 0) {
225 return;
226 }
227
228 while (done < len) {
229 retry:
230 ret = write(s->logfd, buf + done, len - done);
231 if (ret == -1 && errno == EAGAIN) {
232 g_usleep(100);
233 goto retry;
234 }
235
236 if (ret <= 0) {
237 return;
238 }
239 done += ret;
240 }
241}
242
243static int qemu_chr_fe_write_buffer(CharDriverState *s, const uint8_t *buf, int len, int *offset)
244{
245 int res = 0;
246 *offset = 0;
247
248 qemu_mutex_lock(&s->chr_write_lock);
249 while (*offset < len) {
250 retry:
251 res = s->chr_write(s, buf + *offset, len - *offset);
252 if (res < 0 && errno == EAGAIN) {
253 g_usleep(100);
254 goto retry;
255 }
256
257 if (res <= 0) {
258 break;
259 }
260
261 *offset += res;
262 }
263 if (*offset > 0) {
264 qemu_chr_fe_write_log(s, buf, *offset);
265 }
266 qemu_mutex_unlock(&s->chr_write_lock);
267
268 return res;
269}
270
271int qemu_chr_fe_write(CharBackend *be, const uint8_t *buf, int len)
272{
273 CharDriverState *s = be->chr;
274 int ret;
275
276 if (s->replay && replay_mode == REPLAY_MODE_PLAY) {
277 int offset;
278 replay_char_write_event_load(&ret, &offset);
279 assert(offset <= len);
280 qemu_chr_fe_write_buffer(s, buf, offset, &offset);
281 return ret;
282 }
283
284 qemu_mutex_lock(&s->chr_write_lock);
285 ret = s->chr_write(s, buf, len);
286
287 if (ret > 0) {
288 qemu_chr_fe_write_log(s, buf, ret);
289 }
290
291 qemu_mutex_unlock(&s->chr_write_lock);
292
293 if (s->replay && replay_mode == REPLAY_MODE_RECORD) {
294 replay_char_write_event_save(ret, ret < 0 ? 0 : ret);
295 }
296
297 return ret;
298}
299
300static int qemu_chr_write_all(CharDriverState *s, const uint8_t *buf, int len)
301{
302 int offset;
303 int res;
304
305 if (s->replay && replay_mode == REPLAY_MODE_PLAY) {
306 replay_char_write_event_load(&res, &offset);
307 assert(offset <= len);
308 qemu_chr_fe_write_buffer(s, buf, offset, &offset);
309 return res;
310 }
311
312 res = qemu_chr_fe_write_buffer(s, buf, len, &offset);
313
314 if (s->replay && replay_mode == REPLAY_MODE_RECORD) {
315 replay_char_write_event_save(res, offset);
316 }
317
318 if (res < 0) {
319 return res;
320 }
321 return offset;
322}
323
324int qemu_chr_fe_write_all(CharBackend *be, const uint8_t *buf, int len)
325{
326 CharDriverState *s = be->chr;
327
328 return qemu_chr_write_all(s, buf, len);
329}
330
331int qemu_chr_fe_read_all(CharBackend *be, uint8_t *buf, int len)
332{
333 CharDriverState *s = be->chr;
334 int offset = 0, counter = 10;
335 int res;
336
337 if (!s->chr_sync_read) {
338 return 0;
339 }
340
341 if (s->replay && replay_mode == REPLAY_MODE_PLAY) {
342 return replay_char_read_all_load(buf);
343 }
344
345 while (offset < len) {
346 retry:
347 res = s->chr_sync_read(s, buf + offset, len - offset);
348 if (res == -1 && errno == EAGAIN) {
349 g_usleep(100);
350 goto retry;
351 }
352
353 if (res == 0) {
354 break;
355 }
356
357 if (res < 0) {
358 if (s->replay && replay_mode == REPLAY_MODE_RECORD) {
359 replay_char_read_all_save_error(res);
360 }
361 return res;
362 }
363
364 offset += res;
365
366 if (!counter--) {
367 break;
368 }
369 }
370
371 if (s->replay && replay_mode == REPLAY_MODE_RECORD) {
372 replay_char_read_all_save_buf(buf, offset);
373 }
374 return offset;
375}
376
377int qemu_chr_fe_ioctl(CharBackend *be, int cmd, void *arg)
378{
379 CharDriverState *s = be->chr;
380 int res;
381 if (!s->chr_ioctl || s->replay) {
382 res = -ENOTSUP;
383 } else {
384 res = s->chr_ioctl(s, cmd, arg);
385 }
386
387 return res;
388}
389
390int qemu_chr_be_can_write(CharDriverState *s)
391{
392 if (!s->chr_can_read)
393 return 0;
394 return s->chr_can_read(s->handler_opaque);
395}
396
397void qemu_chr_be_write_impl(CharDriverState *s, uint8_t *buf, int len)
398{
399 if (s->chr_read) {
400 s->chr_read(s->handler_opaque, buf, len);
401 }
402}
403
404void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
405{
406 if (s->replay) {
407 if (replay_mode == REPLAY_MODE_PLAY) {
408 return;
409 }
410 replay_chr_be_write(s, buf, len);
411 } else {
412 qemu_chr_be_write_impl(s, buf, len);
413 }
414}
415
416int qemu_chr_fe_get_msgfd(CharBackend *be)
417{
418 CharDriverState *s = be->chr;
419 int fd;
420 int res = (qemu_chr_fe_get_msgfds(be, &fd, 1) == 1) ? fd : -1;
421 if (s->replay) {
422 fprintf(stderr,
423 "Replay: get msgfd is not supported for serial devices yet\n");
424 exit(1);
425 }
426 return res;
427}
428
429int qemu_chr_fe_get_msgfds(CharBackend *be, int *fds, int len)
430{
431 CharDriverState *s = be->chr;
432
433 return s->get_msgfds ? s->get_msgfds(s, fds, len) : -1;
434}
435
436int qemu_chr_fe_set_msgfds(CharBackend *be, int *fds, int num)
437{
438 CharDriverState *s = be->chr;
439
440 return s->set_msgfds ? s->set_msgfds(s, fds, num) : -1;
441}
442
443int qemu_chr_add_client(CharDriverState *s, int fd)
444{
445 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
446}
447
448void qemu_chr_fe_accept_input(CharBackend *be)
449{
450 CharDriverState *s = be->chr;
451
452 if (s->chr_accept_input)
453 s->chr_accept_input(s);
454 qemu_notify_event();
455}
456
457void qemu_chr_fe_printf(CharBackend *be, const char *fmt, ...)
458{
459 char buf[READ_BUF_LEN];
460 va_list ap;
461 va_start(ap, fmt);
462 vsnprintf(buf, sizeof(buf), fmt, ap);
463 /* XXX this blocks entire thread. Rewrite to use
464 * qemu_chr_fe_write and background I/O callbacks */
465 qemu_chr_fe_write_all(be, (uint8_t *)buf, strlen(buf));
466 va_end(ap);
467}
468
469static void remove_fd_in_watch(CharDriverState *chr);
470static int mux_chr_new_handler_tag(CharDriverState *chr, Error **errp);
471static void mux_chr_set_handlers(CharDriverState *chr, GMainContext *context);
472static void mux_set_focus(MuxDriver *d, int focus);
473
474static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
475{
476 return len;
477}
478
479static CharDriverState *qemu_chr_open_null(const char *id,
480 ChardevBackend *backend,
481 ChardevReturn *ret,
482 Error **errp)
483{
484 CharDriverState *chr;
485 ChardevCommon *common = backend->u.null.data;
486
487 chr = qemu_chr_alloc(common, errp);
488 if (!chr) {
489 return NULL;
490 }
491 chr->chr_write = null_chr_write;
492 chr->explicit_be_open = true;
493 return chr;
494}
495
496/* MUX driver for serial I/O splitting */
497#define MAX_MUX 4
498#define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
499#define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
500struct MuxDriver {
501 IOCanReadHandler *chr_can_read[MAX_MUX];
502 IOReadHandler *chr_read[MAX_MUX];
503 IOEventHandler *chr_event[MAX_MUX];
504 void *ext_opaque[MAX_MUX];
505 CharBackend chr;
506 int focus;
507 int mux_cnt;
508 int term_got_escape;
509 int max_size;
510 /* Intermediate input buffer allows to catch escape sequences even if the
511 currently active device is not accepting any input - but only until it
512 is full as well. */
513 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
514 int prod[MAX_MUX];
515 int cons[MAX_MUX];
516 int timestamps;
517
518 /* Protected by the CharDriverState chr_write_lock. */
519 int linestart;
520 int64_t timestamps_start;
521};
522
523/* Called with chr_write_lock held. */
524static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
525{
526 MuxDriver *d = chr->opaque;
527 int ret;
528 if (!d->timestamps) {
529 ret = qemu_chr_fe_write(&d->chr, buf, len);
530 } else {
531 int i;
532
533 ret = 0;
534 for (i = 0; i < len; i++) {
535 if (d->linestart) {
536 char buf1[64];
537 int64_t ti;
538 int secs;
539
540 ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
541 if (d->timestamps_start == -1)
542 d->timestamps_start = ti;
543 ti -= d->timestamps_start;
544 secs = ti / 1000;
545 snprintf(buf1, sizeof(buf1),
546 "[%02d:%02d:%02d.%03d] ",
547 secs / 3600,
548 (secs / 60) % 60,
549 secs % 60,
550 (int)(ti % 1000));
551 /* XXX this blocks entire thread. Rewrite to use
552 * qemu_chr_fe_write and background I/O callbacks */
553 qemu_chr_fe_write_all(&d->chr,
554 (uint8_t *)buf1, strlen(buf1));
555 d->linestart = 0;
556 }
557 ret += qemu_chr_fe_write(&d->chr, buf + i, 1);
558 if (buf[i] == '\n') {
559 d->linestart = 1;
560 }
561 }
562 }
563 return ret;
564}
565
566static const char * const mux_help[] = {
567 "% h print this help\n\r",
568 "% x exit emulator\n\r",
569 "% s save disk data back to file (if -snapshot)\n\r",
570 "% t toggle console timestamps\n\r",
571 "% b send break (magic sysrq)\n\r",
572 "% c switch between console and monitor\n\r",
573 "% % sends %\n\r",
574 NULL
575};
576
577int term_escape_char = 0x01; /* ctrl-a is used for escape */
578static void mux_print_help(CharDriverState *chr)
579{
580 int i, j;
581 char ebuf[15] = "Escape-Char";
582 char cbuf[50] = "\n\r";
583
584 if (term_escape_char > 0 && term_escape_char < 26) {
585 snprintf(cbuf, sizeof(cbuf), "\n\r");
586 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
587 } else {
588 snprintf(cbuf, sizeof(cbuf),
589 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
590 term_escape_char);
591 }
592 /* XXX this blocks entire thread. Rewrite to use
593 * qemu_chr_fe_write and background I/O callbacks */
594 qemu_chr_write_all(chr, (uint8_t *)cbuf, strlen(cbuf));
595 for (i = 0; mux_help[i] != NULL; i++) {
596 for (j=0; mux_help[i][j] != '\0'; j++) {
597 if (mux_help[i][j] == '%')
598 qemu_chr_write_all(chr, (uint8_t *)ebuf, strlen(ebuf));
599 else
600 qemu_chr_write_all(chr, (uint8_t *)&mux_help[i][j], 1);
601 }
602 }
603}
604
605static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
606{
607 if (d->chr_event[mux_nr])
608 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
609}
610
611static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
612{
613 if (d->term_got_escape) {
614 d->term_got_escape = 0;
615 if (ch == term_escape_char)
616 goto send_char;
617 switch(ch) {
618 case '?':
619 case 'h':
620 mux_print_help(chr);
621 break;
622 case 'x':
623 {
624 const char *term = "QEMU: Terminated\n\r";
625 qemu_chr_write_all(chr, (uint8_t *)term, strlen(term));
626 exit(0);
627 break;
628 }
629 case 's':
630 blk_commit_all();
631 break;
632 case 'b':
633 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
634 break;
635 case 'c':
636 assert(d->mux_cnt > 0); /* handler registered with first fe */
637 /* Switch to the next registered device */
638 mux_set_focus(d, (d->focus + 1) % d->mux_cnt);
639 break;
640 case 't':
641 d->timestamps = !d->timestamps;
642 d->timestamps_start = -1;
643 d->linestart = 0;
644 break;
645 }
646 } else if (ch == term_escape_char) {
647 d->term_got_escape = 1;
648 } else {
649 send_char:
650 return 1;
651 }
652 return 0;
653}
654
655static void mux_chr_accept_input(CharDriverState *chr)
656{
657 MuxDriver *d = chr->opaque;
658 int m = d->focus;
659
660 while (d->prod[m] != d->cons[m] &&
661 d->chr_can_read[m] &&
662 d->chr_can_read[m](d->ext_opaque[m])) {
663 d->chr_read[m](d->ext_opaque[m],
664 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
665 }
666}
667
668static int mux_chr_can_read(void *opaque)
669{
670 CharDriverState *chr = opaque;
671 MuxDriver *d = chr->opaque;
672 int m = d->focus;
673
674 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
675 return 1;
676 if (d->chr_can_read[m])
677 return d->chr_can_read[m](d->ext_opaque[m]);
678 return 0;
679}
680
681static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
682{
683 CharDriverState *chr = opaque;
684 MuxDriver *d = chr->opaque;
685 int m = d->focus;
686 int i;
687
688 mux_chr_accept_input (opaque);
689
690 for(i = 0; i < size; i++)
691 if (mux_proc_byte(chr, d, buf[i])) {
692 if (d->prod[m] == d->cons[m] &&
693 d->chr_can_read[m] &&
694 d->chr_can_read[m](d->ext_opaque[m]))
695 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
696 else
697 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
698 }
699}
700
701static void mux_chr_event(void *opaque, int event)
702{
703 CharDriverState *chr = opaque;
704 MuxDriver *d = chr->opaque;
705 int i;
706
707 /* Send the event to all registered listeners */
708 for (i = 0; i < d->mux_cnt; i++)
709 mux_chr_send_event(d, i, event);
710}
711
712static void mux_chr_update_read_handler(CharDriverState *chr,
713 GMainContext *context,
714 int tag)
715{
716 MuxDriver *d = chr->opaque;
717
718 assert(tag >= 0);
719 assert(tag < d->mux_cnt);
720
721 d->ext_opaque[tag] = chr->handler_opaque;
722 d->chr_can_read[tag] = chr->chr_can_read;
723 d->chr_read[tag] = chr->chr_read;
724 d->chr_event[tag] = chr->chr_event;
725}
726
727static bool muxes_realized;
728
729/**
730 * Called after processing of default and command-line-specified
731 * chardevs to deliver CHR_EVENT_OPENED events to any FEs attached
732 * to a mux chardev. This is done here to ensure that
733 * output/prompts/banners are only displayed for the FE that has
734 * focus when initial command-line processing/machine init is
735 * completed.
736 *
737 * After this point, any new FE attached to any new or existing
738 * mux will receive CHR_EVENT_OPENED notifications for the BE
739 * immediately.
740 */
741static void muxes_realize_done(Notifier *notifier, void *unused)
742{
743 CharDriverState *chr;
744
745 QTAILQ_FOREACH(chr, &chardevs, next) {
746 if (chr->is_mux) {
747 MuxDriver *d = chr->opaque;
748 int i;
749
750 /* send OPENED to all already-attached FEs */
751 for (i = 0; i < d->mux_cnt; i++) {
752 mux_chr_send_event(d, i, CHR_EVENT_OPENED);
753 }
754 /* mark mux as OPENED so any new FEs will immediately receive
755 * OPENED event
756 */
757 qemu_chr_be_generic_open(chr);
758 }
759 }
760 muxes_realized = true;
761}
762
763static Notifier muxes_realize_notify = {
764 .notify = muxes_realize_done,
765};
766
767static GSource *mux_chr_add_watch(CharDriverState *s, GIOCondition cond)
768{
769 MuxDriver *d = s->opaque;
770 CharDriverState *chr = qemu_chr_fe_get_driver(&d->chr);
771
772 return chr->chr_add_watch(chr, cond);
773}
774
775static void mux_chr_close(struct CharDriverState *chr)
776{
777 MuxDriver *d = chr->opaque;
778
779 qemu_chr_fe_deinit(&d->chr);
780 g_free(d);
781}
782
783static int mux_chr_new_handler_tag(CharDriverState *chr, Error **errp)
784{
785 MuxDriver *d = chr->opaque;
786
787 if (d->mux_cnt >= MAX_MUX) {
788 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
789 return -1;
790 }
791
792 return d->mux_cnt++;
793}
794
795static void mux_chr_set_handlers(CharDriverState *chr, GMainContext *context)
796{
797 MuxDriver *d = chr->opaque;
798
799 /* Fix up the real driver with mux routines */
800 qemu_chr_fe_set_handlers(&d->chr,
801 mux_chr_can_read,
802 mux_chr_read,
803 mux_chr_event,
804 chr,
805 context);
806}
807
808static void mux_set_focus(MuxDriver *d, int focus)
809{
810 assert(focus >= 0);
811 assert(focus < d->mux_cnt);
812
813 if (d->focus != -1) {
814 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
815 }
816
817 d->focus = focus;
818 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
819}
820
821static CharDriverState *qemu_chr_open_mux(const char *id,
822 ChardevBackend *backend,
823 ChardevReturn *ret, Error **errp)
824{
825 ChardevMux *mux = backend->u.mux.data;
826 CharDriverState *chr, *drv;
827 MuxDriver *d;
828 ChardevCommon *common = qapi_ChardevMux_base(mux);
829
830 drv = qemu_chr_find(mux->chardev);
831 if (drv == NULL) {
832 error_setg(errp, "mux: base chardev %s not found", mux->chardev);
833 return NULL;
834 }
835
836 chr = qemu_chr_alloc(common, errp);
837 if (!chr) {
838 return NULL;
839 }
840 d = g_new0(MuxDriver, 1);
841
842 chr->opaque = d;
843 d->focus = -1;
844 chr->chr_close = mux_chr_close;
845 chr->chr_write = mux_chr_write;
846 chr->chr_update_read_handler = mux_chr_update_read_handler;
847 chr->chr_accept_input = mux_chr_accept_input;
848 /* Frontend guest-open / -close notification is not support with muxes */
849 chr->chr_set_fe_open = NULL;
850 if (drv->chr_add_watch) {
851 chr->chr_add_watch = mux_chr_add_watch;
852 }
853 /* only default to opened state if we've realized the initial
854 * set of muxes
855 */
856 chr->explicit_be_open = muxes_realized ? 0 : 1;
857 chr->is_mux = 1;
858 if (!qemu_chr_fe_init(&d->chr, drv, errp)) {
859 qemu_chr_free(chr);
860 return NULL;
861 }
862
863 return chr;
864}
865
866CharDriverState *qemu_chr_fe_get_driver(CharBackend *be)
867{
868 return be->chr;
869}
870
871bool qemu_chr_fe_init(CharBackend *b, CharDriverState *s, Error **errp)
872{
873 int tag = 0;
874
875 if (s->is_mux) {
876 tag = mux_chr_new_handler_tag(s, errp);
877 if (tag < 0) {
878 return false;
879 }
880 }
881
882 b->tag = tag;
883 b->chr = s;
884
885 return true;
886}
887
888void qemu_chr_fe_deinit(CharBackend *b)
889{
890 assert(b);
891
892 if (b->chr) {
893 qemu_chr_fe_set_handlers(b, NULL, NULL, NULL, NULL, NULL);
894 b->chr->avail_connections++;
895 b->chr = NULL;
896 }
897}
898
899void qemu_chr_fe_set_handlers(CharBackend *b,
900 IOCanReadHandler *fd_can_read,
901 IOReadHandler *fd_read,
902 IOEventHandler *fd_event,
903 void *opaque,
904 GMainContext *context)
905{
906 CharDriverState *s;
907 int fe_open;
908
909 s = b->chr;
910 if (!s) {
911 return;
912 }
913
914 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
915 fe_open = 0;
916 remove_fd_in_watch(s);
917 } else {
918 fe_open = 1;
919 }
920 s->chr_can_read = fd_can_read;
921 s->chr_read = fd_read;
922 s->chr_event = fd_event;
923 s->handler_opaque = opaque;
924 if (s->chr_update_read_handler) {
925 s->chr_update_read_handler(s, context, b->tag);
926 }
927
928 if (!s->explicit_fe_open) {
929 qemu_chr_fe_set_open(b, fe_open);
930 }
931
932 if (fe_open) {
933 qemu_chr_fe_take_focus(b);
934 /* We're connecting to an already opened device, so let's make sure we
935 also get the open event */
936 if (s->be_open) {
937 qemu_chr_be_generic_open(s);
938 }
939 }
940
941 if (s->is_mux) {
942 mux_chr_set_handlers(s, context);
943 }
944}
945
946void qemu_chr_fe_take_focus(CharBackend *b)
947{
948 if (b->chr->is_mux) {
949 mux_set_focus(b->chr->opaque, b->tag);
950 }
951}
952
953typedef struct IOWatchPoll
954{
955 GSource parent;
956
957 QIOChannel *ioc;
958 GSource *src;
959
960 IOCanReadHandler *fd_can_read;
961 GSourceFunc fd_read;
962 void *opaque;
963 GMainContext *context;
964} IOWatchPoll;
965
966static IOWatchPoll *io_watch_poll_from_source(GSource *source)
967{
968 return container_of(source, IOWatchPoll, parent);
969}
970
971static gboolean io_watch_poll_prepare(GSource *source,
972 gint *timeout_)
973{
974 IOWatchPoll *iwp = io_watch_poll_from_source(source);
975 bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
976 bool was_active = iwp->src != NULL;
977 if (was_active == now_active) {
978 return FALSE;
979 }
980
981 if (now_active) {
982 iwp->src = qio_channel_create_watch(
983 iwp->ioc, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL);
984 g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
985 g_source_attach(iwp->src, iwp->context);
986 } else {
987 g_source_destroy(iwp->src);
988 g_source_unref(iwp->src);
989 iwp->src = NULL;
990 }
991 return FALSE;
992}
993
994static gboolean io_watch_poll_check(GSource *source)
995{
996 return FALSE;
997}
998
999static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
1000 gpointer user_data)
1001{
1002 abort();
1003}
1004
1005static void io_watch_poll_finalize(GSource *source)
1006{
1007 /* Due to a glib bug, removing the last reference to a source
1008 * inside a finalize callback causes recursive locking (and a
1009 * deadlock). This is not a problem inside other callbacks,
1010 * including dispatch callbacks, so we call io_remove_watch_poll
1011 * to remove this source. At this point, iwp->src must
1012 * be NULL, or we would leak it.
1013 *
1014 * This would be solved much more elegantly by child sources,
1015 * but we support older glib versions that do not have them.
1016 */
1017 IOWatchPoll *iwp = io_watch_poll_from_source(source);
1018 assert(iwp->src == NULL);
1019}
1020
1021static GSourceFuncs io_watch_poll_funcs = {
1022 .prepare = io_watch_poll_prepare,
1023 .check = io_watch_poll_check,
1024 .dispatch = io_watch_poll_dispatch,
1025 .finalize = io_watch_poll_finalize,
1026};
1027
1028/* Can only be used for read */
1029static guint io_add_watch_poll(QIOChannel *ioc,
1030 IOCanReadHandler *fd_can_read,
1031 QIOChannelFunc fd_read,
1032 gpointer user_data,
1033 GMainContext *context)
1034{
1035 IOWatchPoll *iwp;
1036 int tag;
1037
1038 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs,
1039 sizeof(IOWatchPoll));
1040 iwp->fd_can_read = fd_can_read;
1041 iwp->opaque = user_data;
1042 iwp->ioc = ioc;
1043 iwp->fd_read = (GSourceFunc) fd_read;
1044 iwp->src = NULL;
1045 iwp->context = context;
1046
1047 tag = g_source_attach(&iwp->parent, context);
1048 g_source_unref(&iwp->parent);
1049 return tag;
1050}
1051
1052static void io_remove_watch_poll(guint tag)
1053{
1054 GSource *source;
1055 IOWatchPoll *iwp;
1056
1057 g_return_if_fail (tag > 0);
1058
1059 source = g_main_context_find_source_by_id(NULL, tag);
1060 g_return_if_fail (source != NULL);
1061
1062 iwp = io_watch_poll_from_source(source);
1063 if (iwp->src) {
1064 g_source_destroy(iwp->src);
1065 g_source_unref(iwp->src);
1066 iwp->src = NULL;
1067 }
1068 g_source_destroy(&iwp->parent);
1069}
1070
1071static void remove_fd_in_watch(CharDriverState *chr)
1072{
1073 if (chr->fd_in_tag) {
1074 io_remove_watch_poll(chr->fd_in_tag);
1075 chr->fd_in_tag = 0;
1076 }
1077}
1078
1079
1080static int io_channel_send_full(QIOChannel *ioc,
1081 const void *buf, size_t len,
1082 int *fds, size_t nfds)
1083{
1084 size_t offset = 0;
1085
1086 while (offset < len) {
1087 ssize_t ret = 0;
1088 struct iovec iov = { .iov_base = (char *)buf + offset,
1089 .iov_len = len - offset };
1090
1091 ret = qio_channel_writev_full(
1092 ioc, &iov, 1,
1093 fds, nfds, NULL);
1094 if (ret == QIO_CHANNEL_ERR_BLOCK) {
1095 if (offset) {
1096 return offset;
1097 }
1098
1099 errno = EAGAIN;
1100 return -1;
1101 } else if (ret < 0) {
1102 errno = EINVAL;
1103 return -1;
1104 }
1105
1106 offset += ret;
1107 }
1108
1109 return offset;
1110}
1111
1112
1113#ifndef _WIN32
1114static int io_channel_send(QIOChannel *ioc, const void *buf, size_t len)
1115{
1116 return io_channel_send_full(ioc, buf, len, NULL, 0);
1117}
1118
1119
1120typedef struct FDCharDriver {
1121 CharDriverState *chr;
1122 QIOChannel *ioc_in, *ioc_out;
1123 int max_size;
1124} FDCharDriver;
1125
1126/* Called with chr_write_lock held. */
1127static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1128{
1129 FDCharDriver *s = chr->opaque;
1130
1131 return io_channel_send(s->ioc_out, buf, len);
1132}
1133
1134static gboolean fd_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
1135{
1136 CharDriverState *chr = opaque;
1137 FDCharDriver *s = chr->opaque;
1138 int len;
1139 uint8_t buf[READ_BUF_LEN];
1140 ssize_t ret;
1141
1142 len = sizeof(buf);
1143 if (len > s->max_size) {
1144 len = s->max_size;
1145 }
1146 if (len == 0) {
1147 return TRUE;
1148 }
1149
1150 ret = qio_channel_read(
1151 chan, (gchar *)buf, len, NULL);
1152 if (ret == 0) {
1153 remove_fd_in_watch(chr);
1154 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1155 return FALSE;
1156 }
1157 if (ret > 0) {
1158 qemu_chr_be_write(chr, buf, ret);
1159 }
1160
1161 return TRUE;
1162}
1163
1164static int fd_chr_read_poll(void *opaque)
1165{
1166 CharDriverState *chr = opaque;
1167 FDCharDriver *s = chr->opaque;
1168
1169 s->max_size = qemu_chr_be_can_write(chr);
1170 return s->max_size;
1171}
1172
1173static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1174{
1175 FDCharDriver *s = chr->opaque;
1176 return qio_channel_create_watch(s->ioc_out, cond);
1177}
1178
1179static void fd_chr_update_read_handler(CharDriverState *chr,
1180 GMainContext *context,
1181 int tag)
1182{
1183 FDCharDriver *s = chr->opaque;
1184
1185 remove_fd_in_watch(chr);
1186 if (s->ioc_in) {
1187 chr->fd_in_tag = io_add_watch_poll(s->ioc_in,
1188 fd_chr_read_poll,
1189 fd_chr_read, chr,
1190 context);
1191 }
1192}
1193
1194static void fd_chr_close(struct CharDriverState *chr)
1195{
1196 FDCharDriver *s = chr->opaque;
1197
1198 remove_fd_in_watch(chr);
1199 if (s->ioc_in) {
1200 object_unref(OBJECT(s->ioc_in));
1201 }
1202 if (s->ioc_out) {
1203 object_unref(OBJECT(s->ioc_out));
1204 }
1205
1206 g_free(s);
1207 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1208}
1209
1210/* open a character device to a unix fd */
1211static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out,
1212 ChardevCommon *backend, Error **errp)
1213{
1214 CharDriverState *chr;
1215 FDCharDriver *s;
1216
1217 chr = qemu_chr_alloc(backend, errp);
1218 if (!chr) {
1219 return NULL;
1220 }
1221 s = g_new0(FDCharDriver, 1);
1222 s->ioc_in = QIO_CHANNEL(qio_channel_file_new_fd(fd_in));
1223 s->ioc_out = QIO_CHANNEL(qio_channel_file_new_fd(fd_out));
1224 qemu_set_nonblock(fd_out);
1225 s->chr = chr;
1226 chr->opaque = s;
1227 chr->chr_add_watch = fd_chr_add_watch;
1228 chr->chr_write = fd_chr_write;
1229 chr->chr_update_read_handler = fd_chr_update_read_handler;
1230 chr->chr_close = fd_chr_close;
1231
1232 return chr;
1233}
1234
1235static CharDriverState *qemu_chr_open_pipe(const char *id,
1236 ChardevBackend *backend,
1237 ChardevReturn *ret,
1238 Error **errp)
1239{
1240 ChardevHostdev *opts = backend->u.pipe.data;
1241 int fd_in, fd_out;
1242 char *filename_in;
1243 char *filename_out;
1244 const char *filename = opts->device;
1245 ChardevCommon *common = qapi_ChardevHostdev_base(opts);
1246
1247
1248 filename_in = g_strdup_printf("%s.in", filename);
1249 filename_out = g_strdup_printf("%s.out", filename);
1250 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
1251 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
1252 g_free(filename_in);
1253 g_free(filename_out);
1254 if (fd_in < 0 || fd_out < 0) {
1255 if (fd_in >= 0)
1256 close(fd_in);
1257 if (fd_out >= 0)
1258 close(fd_out);
1259 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
1260 if (fd_in < 0) {
1261 error_setg_file_open(errp, errno, filename);
1262 return NULL;
1263 }
1264 }
1265 return qemu_chr_open_fd(fd_in, fd_out, common, errp);
1266}
1267
1268/* init terminal so that we can grab keys */
1269static struct termios oldtty;
1270static int old_fd0_flags;
1271static bool stdio_in_use;
1272static bool stdio_allow_signal;
1273static bool stdio_echo_state;
1274
1275static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo);
1276
1277static void term_exit(void)
1278{
1279 tcsetattr (0, TCSANOW, &oldtty);
1280 fcntl(0, F_SETFL, old_fd0_flags);
1281}
1282
1283static void term_stdio_handler(int sig)
1284{
1285 /* restore echo after resume from suspend. */
1286 qemu_chr_set_echo_stdio(NULL, stdio_echo_state);
1287}
1288
1289static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
1290{
1291 struct termios tty;
1292
1293 stdio_echo_state = echo;
1294 tty = oldtty;
1295 if (!echo) {
1296 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1297 |INLCR|IGNCR|ICRNL|IXON);
1298 tty.c_oflag |= OPOST;
1299 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1300 tty.c_cflag &= ~(CSIZE|PARENB);
1301 tty.c_cflag |= CS8;
1302 tty.c_cc[VMIN] = 1;
1303 tty.c_cc[VTIME] = 0;
1304 }
1305 if (!stdio_allow_signal)
1306 tty.c_lflag &= ~ISIG;
1307
1308 tcsetattr (0, TCSANOW, &tty);
1309}
1310
1311static void qemu_chr_close_stdio(struct CharDriverState *chr)
1312{
1313 term_exit();
1314 fd_chr_close(chr);
1315}
1316
1317static CharDriverState *qemu_chr_open_stdio(const char *id,
1318 ChardevBackend *backend,
1319 ChardevReturn *ret,
1320 Error **errp)
1321{
1322 ChardevStdio *opts = backend->u.stdio.data;
1323 CharDriverState *chr;
1324 struct sigaction act;
1325 ChardevCommon *common = qapi_ChardevStdio_base(opts);
1326
1327 if (is_daemonized()) {
1328 error_setg(errp, "cannot use stdio with -daemonize");
1329 return NULL;
1330 }
1331
1332 if (stdio_in_use) {
1333 error_setg(errp, "cannot use stdio by multiple character devices");
1334 return NULL;
1335 }
1336
1337 stdio_in_use = true;
1338 old_fd0_flags = fcntl(0, F_GETFL);
1339 tcgetattr(0, &oldtty);
1340 qemu_set_nonblock(0);
1341 atexit(term_exit);
1342
1343 memset(&act, 0, sizeof(act));
1344 act.sa_handler = term_stdio_handler;
1345 sigaction(SIGCONT, &act, NULL);
1346
1347 chr = qemu_chr_open_fd(0, 1, common, errp);
1348 if (!chr) {
1349 return NULL;
1350 }
1351 chr->chr_close = qemu_chr_close_stdio;
1352 chr->chr_set_echo = qemu_chr_set_echo_stdio;
1353 if (opts->has_signal) {
1354 stdio_allow_signal = opts->signal;
1355 }
1356 qemu_chr_set_echo_stdio(chr, false);
1357
1358 return chr;
1359}
1360
1361#if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1362 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
1363 || defined(__GLIBC__)
1364
1365#define HAVE_CHARDEV_SERIAL 1
1366#define HAVE_CHARDEV_PTY 1
1367
1368typedef struct {
1369 QIOChannel *ioc;
1370 int read_bytes;
1371
1372 /* Protected by the CharDriverState chr_write_lock. */
1373 int connected;
1374 guint timer_tag;
1375 guint open_tag;
1376} PtyCharDriver;
1377
1378static void pty_chr_update_read_handler_locked(CharDriverState *chr);
1379static void pty_chr_state(CharDriverState *chr, int connected);
1380
1381static gboolean pty_chr_timer(gpointer opaque)
1382{
1383 struct CharDriverState *chr = opaque;
1384 PtyCharDriver *s = chr->opaque;
1385
1386 qemu_mutex_lock(&chr->chr_write_lock);
1387 s->timer_tag = 0;
1388 s->open_tag = 0;
1389 if (!s->connected) {
1390 /* Next poll ... */
1391 pty_chr_update_read_handler_locked(chr);
1392 }
1393 qemu_mutex_unlock(&chr->chr_write_lock);
1394 return FALSE;
1395}
1396
1397/* Called with chr_write_lock held. */
1398static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1399{
1400 PtyCharDriver *s = chr->opaque;
1401
1402 if (s->timer_tag) {
1403 g_source_remove(s->timer_tag);
1404 s->timer_tag = 0;
1405 }
1406
1407 if (ms == 1000) {
1408 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1409 } else {
1410 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1411 }
1412}
1413
1414/* Called with chr_write_lock held. */
1415static void pty_chr_update_read_handler_locked(CharDriverState *chr)
1416{
1417 PtyCharDriver *s = chr->opaque;
1418 GPollFD pfd;
1419 int rc;
1420 QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc);
1421
1422 pfd.fd = fioc->fd;
1423 pfd.events = G_IO_OUT;
1424 pfd.revents = 0;
1425 do {
1426 rc = g_poll(&pfd, 1, 0);
1427 } while (rc == -1 && errno == EINTR);
1428 assert(rc >= 0);
1429
1430 if (pfd.revents & G_IO_HUP) {
1431 pty_chr_state(chr, 0);
1432 } else {
1433 pty_chr_state(chr, 1);
1434 }
1435}
1436
1437static void pty_chr_update_read_handler(CharDriverState *chr,
1438 GMainContext *context,
1439 int tag)
1440{
1441 qemu_mutex_lock(&chr->chr_write_lock);
1442 pty_chr_update_read_handler_locked(chr);
1443 qemu_mutex_unlock(&chr->chr_write_lock);
1444}
1445
1446/* Called with chr_write_lock held. */
1447static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1448{
1449 PtyCharDriver *s = chr->opaque;
1450
1451 if (!s->connected) {
1452 /* guest sends data, check for (re-)connect */
1453 pty_chr_update_read_handler_locked(chr);
1454 if (!s->connected) {
1455 return 0;
1456 }
1457 }
1458 return io_channel_send(s->ioc, buf, len);
1459}
1460
1461static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1462{
1463 PtyCharDriver *s = chr->opaque;
1464 if (!s->connected) {
1465 return NULL;
1466 }
1467 return qio_channel_create_watch(s->ioc, cond);
1468}
1469
1470static int pty_chr_read_poll(void *opaque)
1471{
1472 CharDriverState *chr = opaque;
1473 PtyCharDriver *s = chr->opaque;
1474
1475 s->read_bytes = qemu_chr_be_can_write(chr);
1476 return s->read_bytes;
1477}
1478
1479static gboolean pty_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
1480{
1481 CharDriverState *chr = opaque;
1482 PtyCharDriver *s = chr->opaque;
1483 gsize len;
1484 uint8_t buf[READ_BUF_LEN];
1485 ssize_t ret;
1486
1487 len = sizeof(buf);
1488 if (len > s->read_bytes)
1489 len = s->read_bytes;
1490 if (len == 0) {
1491 return TRUE;
1492 }
1493 ret = qio_channel_read(s->ioc, (char *)buf, len, NULL);
1494 if (ret <= 0) {
1495 pty_chr_state(chr, 0);
1496 return FALSE;
1497 } else {
1498 pty_chr_state(chr, 1);
1499 qemu_chr_be_write(chr, buf, ret);
1500 }
1501 return TRUE;
1502}
1503
1504static gboolean qemu_chr_be_generic_open_func(gpointer opaque)
1505{
1506 CharDriverState *chr = opaque;
1507 PtyCharDriver *s = chr->opaque;
1508
1509 s->open_tag = 0;
1510 qemu_chr_be_generic_open(chr);
1511 return FALSE;
1512}
1513
1514/* Called with chr_write_lock held. */
1515static void pty_chr_state(CharDriverState *chr, int connected)
1516{
1517 PtyCharDriver *s = chr->opaque;
1518
1519 if (!connected) {
1520 if (s->open_tag) {
1521 g_source_remove(s->open_tag);
1522 s->open_tag = 0;
1523 }
1524 remove_fd_in_watch(chr);
1525 s->connected = 0;
1526 /* (re-)connect poll interval for idle guests: once per second.
1527 * We check more frequently in case the guests sends data to
1528 * the virtual device linked to our pty. */
1529 pty_chr_rearm_timer(chr, 1000);
1530 } else {
1531 if (s->timer_tag) {
1532 g_source_remove(s->timer_tag);
1533 s->timer_tag = 0;
1534 }
1535 if (!s->connected) {
1536 g_assert(s->open_tag == 0);
1537 s->connected = 1;
1538 s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, chr);
1539 }
1540 if (!chr->fd_in_tag) {
1541 chr->fd_in_tag = io_add_watch_poll(s->ioc,
1542 pty_chr_read_poll,
1543 pty_chr_read,
1544 chr, NULL);
1545 }
1546 }
1547}
1548
1549static void pty_chr_close(struct CharDriverState *chr)
1550{
1551 PtyCharDriver *s = chr->opaque;
1552
1553 qemu_mutex_lock(&chr->chr_write_lock);
1554 pty_chr_state(chr, 0);
1555 object_unref(OBJECT(s->ioc));
1556 if (s->timer_tag) {
1557 g_source_remove(s->timer_tag);
1558 s->timer_tag = 0;
1559 }
1560 qemu_mutex_unlock(&chr->chr_write_lock);
1561 g_free(s);
1562 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1563}
1564
1565static CharDriverState *qemu_chr_open_pty(const char *id,
1566 ChardevBackend *backend,
1567 ChardevReturn *ret,
1568 Error **errp)
1569{
1570 CharDriverState *chr;
1571 PtyCharDriver *s;
1572 int master_fd, slave_fd;
1573 char pty_name[PATH_MAX];
1574 ChardevCommon *common = backend->u.pty.data;
1575
1576 master_fd = qemu_openpty_raw(&slave_fd, pty_name);
1577 if (master_fd < 0) {
1578 error_setg_errno(errp, errno, "Failed to create PTY");
1579 return NULL;
1580 }
1581
1582 close(slave_fd);
1583 qemu_set_nonblock(master_fd);
1584
1585 chr = qemu_chr_alloc(common, errp);
1586 if (!chr) {
1587 close(master_fd);
1588 return NULL;
1589 }
1590
1591 chr->filename = g_strdup_printf("pty:%s", pty_name);
1592 ret->pty = g_strdup(pty_name);
1593 ret->has_pty = true;
1594
1595 fprintf(stderr, "char device redirected to %s (label %s)\n",
1596 pty_name, id);
1597
1598 s = g_new0(PtyCharDriver, 1);
1599 chr->opaque = s;
1600 chr->chr_write = pty_chr_write;
1601 chr->chr_update_read_handler = pty_chr_update_read_handler;
1602 chr->chr_close = pty_chr_close;
1603 chr->chr_add_watch = pty_chr_add_watch;
1604 chr->explicit_be_open = true;
1605
1606 s->ioc = QIO_CHANNEL(qio_channel_file_new_fd(master_fd));
1607 s->timer_tag = 0;
1608
1609 return chr;
1610}
1611
1612static void tty_serial_init(int fd, int speed,
1613 int parity, int data_bits, int stop_bits)
1614{
1615 struct termios tty;
1616 speed_t spd;
1617
1618#if 0
1619 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1620 speed, parity, data_bits, stop_bits);
1621#endif
1622 tcgetattr (fd, &tty);
1623
1624#define check_speed(val) if (speed <= val) { spd = B##val; break; }
1625 speed = speed * 10 / 11;
1626 do {
1627 check_speed(50);
1628 check_speed(75);
1629 check_speed(110);
1630 check_speed(134);
1631 check_speed(150);
1632 check_speed(200);
1633 check_speed(300);
1634 check_speed(600);
1635 check_speed(1200);
1636 check_speed(1800);
1637 check_speed(2400);
1638 check_speed(4800);
1639 check_speed(9600);
1640 check_speed(19200);
1641 check_speed(38400);
1642 /* Non-Posix values follow. They may be unsupported on some systems. */
1643 check_speed(57600);
1644 check_speed(115200);
1645#ifdef B230400
1646 check_speed(230400);
1647#endif
1648#ifdef B460800
1649 check_speed(460800);
1650#endif
1651#ifdef B500000
1652 check_speed(500000);
1653#endif
1654#ifdef B576000
1655 check_speed(576000);
1656#endif
1657#ifdef B921600
1658 check_speed(921600);
1659#endif
1660#ifdef B1000000
1661 check_speed(1000000);
1662#endif
1663#ifdef B1152000
1664 check_speed(1152000);
1665#endif
1666#ifdef B1500000
1667 check_speed(1500000);
1668#endif
1669#ifdef B2000000
1670 check_speed(2000000);
1671#endif
1672#ifdef B2500000
1673 check_speed(2500000);
1674#endif
1675#ifdef B3000000
1676 check_speed(3000000);
1677#endif
1678#ifdef B3500000
1679 check_speed(3500000);
1680#endif
1681#ifdef B4000000
1682 check_speed(4000000);
1683#endif
1684 spd = B115200;
1685 } while (0);
1686
1687 cfsetispeed(&tty, spd);
1688 cfsetospeed(&tty, spd);
1689
1690 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1691 |INLCR|IGNCR|ICRNL|IXON);
1692 tty.c_oflag |= OPOST;
1693 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1694 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1695 switch(data_bits) {
1696 default:
1697 case 8:
1698 tty.c_cflag |= CS8;
1699 break;
1700 case 7:
1701 tty.c_cflag |= CS7;
1702 break;
1703 case 6:
1704 tty.c_cflag |= CS6;
1705 break;
1706 case 5:
1707 tty.c_cflag |= CS5;
1708 break;
1709 }
1710 switch(parity) {
1711 default:
1712 case 'N':
1713 break;
1714 case 'E':
1715 tty.c_cflag |= PARENB;
1716 break;
1717 case 'O':
1718 tty.c_cflag |= PARENB | PARODD;
1719 break;
1720 }
1721 if (stop_bits == 2)
1722 tty.c_cflag |= CSTOPB;
1723
1724 tcsetattr (fd, TCSANOW, &tty);
1725}
1726
1727static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1728{
1729 FDCharDriver *s = chr->opaque;
1730 QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc_in);
1731
1732 switch(cmd) {
1733 case CHR_IOCTL_SERIAL_SET_PARAMS:
1734 {
1735 QEMUSerialSetParams *ssp = arg;
1736 tty_serial_init(fioc->fd,
1737 ssp->speed, ssp->parity,
1738 ssp->data_bits, ssp->stop_bits);
1739 }
1740 break;
1741 case CHR_IOCTL_SERIAL_SET_BREAK:
1742 {
1743 int enable = *(int *)arg;
1744 if (enable) {
1745 tcsendbreak(fioc->fd, 1);
1746 }
1747 }
1748 break;
1749 case CHR_IOCTL_SERIAL_GET_TIOCM:
1750 {
1751 int sarg = 0;
1752 int *targ = (int *)arg;
1753 ioctl(fioc->fd, TIOCMGET, &sarg);
1754 *targ = 0;
1755 if (sarg & TIOCM_CTS)
1756 *targ |= CHR_TIOCM_CTS;
1757 if (sarg & TIOCM_CAR)
1758 *targ |= CHR_TIOCM_CAR;
1759 if (sarg & TIOCM_DSR)
1760 *targ |= CHR_TIOCM_DSR;
1761 if (sarg & TIOCM_RI)
1762 *targ |= CHR_TIOCM_RI;
1763 if (sarg & TIOCM_DTR)
1764 *targ |= CHR_TIOCM_DTR;
1765 if (sarg & TIOCM_RTS)
1766 *targ |= CHR_TIOCM_RTS;
1767 }
1768 break;
1769 case CHR_IOCTL_SERIAL_SET_TIOCM:
1770 {
1771 int sarg = *(int *)arg;
1772 int targ = 0;
1773 ioctl(fioc->fd, TIOCMGET, &targ);
1774 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1775 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1776 if (sarg & CHR_TIOCM_CTS)
1777 targ |= TIOCM_CTS;
1778 if (sarg & CHR_TIOCM_CAR)
1779 targ |= TIOCM_CAR;
1780 if (sarg & CHR_TIOCM_DSR)
1781 targ |= TIOCM_DSR;
1782 if (sarg & CHR_TIOCM_RI)
1783 targ |= TIOCM_RI;
1784 if (sarg & CHR_TIOCM_DTR)
1785 targ |= TIOCM_DTR;
1786 if (sarg & CHR_TIOCM_RTS)
1787 targ |= TIOCM_RTS;
1788 ioctl(fioc->fd, TIOCMSET, &targ);
1789 }
1790 break;
1791 default:
1792 return -ENOTSUP;
1793 }
1794 return 0;
1795}
1796
1797static void qemu_chr_close_tty(CharDriverState *chr)
1798{
1799 fd_chr_close(chr);
1800}
1801
1802static CharDriverState *qemu_chr_open_tty_fd(int fd,
1803 ChardevCommon *backend,
1804 Error **errp)
1805{
1806 CharDriverState *chr;
1807
1808 tty_serial_init(fd, 115200, 'N', 8, 1);
1809 chr = qemu_chr_open_fd(fd, fd, backend, errp);
1810 if (!chr) {
1811 return NULL;
1812 }
1813 chr->chr_ioctl = tty_serial_ioctl;
1814 chr->chr_close = qemu_chr_close_tty;
1815 return chr;
1816}
1817#endif /* __linux__ || __sun__ */
1818
1819#if defined(__linux__)
1820
1821#define HAVE_CHARDEV_PARPORT 1
1822
1823typedef struct {
1824 int fd;
1825 int mode;
1826} ParallelCharDriver;
1827
1828static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1829{
1830 if (s->mode != mode) {
1831 int m = mode;
1832 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1833 return 0;
1834 s->mode = mode;
1835 }
1836 return 1;
1837}
1838
1839static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1840{
1841 ParallelCharDriver *drv = chr->opaque;
1842 int fd = drv->fd;
1843 uint8_t b;
1844
1845 switch(cmd) {
1846 case CHR_IOCTL_PP_READ_DATA:
1847 if (ioctl(fd, PPRDATA, &b) < 0)
1848 return -ENOTSUP;
1849 *(uint8_t *)arg = b;
1850 break;
1851 case CHR_IOCTL_PP_WRITE_DATA:
1852 b = *(uint8_t *)arg;
1853 if (ioctl(fd, PPWDATA, &b) < 0)
1854 return -ENOTSUP;
1855 break;
1856 case CHR_IOCTL_PP_READ_CONTROL:
1857 if (ioctl(fd, PPRCONTROL, &b) < 0)
1858 return -ENOTSUP;
1859 /* Linux gives only the lowest bits, and no way to know data
1860 direction! For better compatibility set the fixed upper
1861 bits. */
1862 *(uint8_t *)arg = b | 0xc0;
1863 break;
1864 case CHR_IOCTL_PP_WRITE_CONTROL:
1865 b = *(uint8_t *)arg;
1866 if (ioctl(fd, PPWCONTROL, &b) < 0)
1867 return -ENOTSUP;
1868 break;
1869 case CHR_IOCTL_PP_READ_STATUS:
1870 if (ioctl(fd, PPRSTATUS, &b) < 0)
1871 return -ENOTSUP;
1872 *(uint8_t *)arg = b;
1873 break;
1874 case CHR_IOCTL_PP_DATA_DIR:
1875 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1876 return -ENOTSUP;
1877 break;
1878 case CHR_IOCTL_PP_EPP_READ_ADDR:
1879 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1880 struct ParallelIOArg *parg = arg;
1881 int n = read(fd, parg->buffer, parg->count);
1882 if (n != parg->count) {
1883 return -EIO;
1884 }
1885 }
1886 break;
1887 case CHR_IOCTL_PP_EPP_READ:
1888 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1889 struct ParallelIOArg *parg = arg;
1890 int n = read(fd, parg->buffer, parg->count);
1891 if (n != parg->count) {
1892 return -EIO;
1893 }
1894 }
1895 break;
1896 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1897 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1898 struct ParallelIOArg *parg = arg;
1899 int n = write(fd, parg->buffer, parg->count);
1900 if (n != parg->count) {
1901 return -EIO;
1902 }
1903 }
1904 break;
1905 case CHR_IOCTL_PP_EPP_WRITE:
1906 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1907 struct ParallelIOArg *parg = arg;
1908 int n = write(fd, parg->buffer, parg->count);
1909 if (n != parg->count) {
1910 return -EIO;
1911 }
1912 }
1913 break;
1914 default:
1915 return -ENOTSUP;
1916 }
1917 return 0;
1918}
1919
1920static void pp_close(CharDriverState *chr)
1921{
1922 ParallelCharDriver *drv = chr->opaque;
1923 int fd = drv->fd;
1924
1925 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1926 ioctl(fd, PPRELEASE);
1927 close(fd);
1928 g_free(drv);
1929 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1930}
1931
1932static CharDriverState *qemu_chr_open_pp_fd(int fd,
1933 ChardevCommon *backend,
1934 Error **errp)
1935{
1936 CharDriverState *chr;
1937 ParallelCharDriver *drv;
1938
1939 if (ioctl(fd, PPCLAIM) < 0) {
1940 error_setg_errno(errp, errno, "not a parallel port");
1941 close(fd);
1942 return NULL;
1943 }
1944
1945 chr = qemu_chr_alloc(backend, errp);
1946 if (!chr) {
1947 return NULL;
1948 }
1949
1950 drv = g_new0(ParallelCharDriver, 1);
1951 chr->opaque = drv;
1952 chr->chr_write = null_chr_write;
1953 chr->chr_ioctl = pp_ioctl;
1954 chr->chr_close = pp_close;
1955
1956 drv->fd = fd;
1957 drv->mode = IEEE1284_MODE_COMPAT;
1958
1959 return chr;
1960}
1961#endif /* __linux__ */
1962
1963#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1964
1965#define HAVE_CHARDEV_PARPORT 1
1966
1967static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1968{
1969 int fd = (int)(intptr_t)chr->opaque;
1970 uint8_t b;
1971
1972 switch(cmd) {
1973 case CHR_IOCTL_PP_READ_DATA:
1974 if (ioctl(fd, PPIGDATA, &b) < 0)
1975 return -ENOTSUP;
1976 *(uint8_t *)arg = b;
1977 break;
1978 case CHR_IOCTL_PP_WRITE_DATA:
1979 b = *(uint8_t *)arg;
1980 if (ioctl(fd, PPISDATA, &b) < 0)
1981 return -ENOTSUP;
1982 break;
1983 case CHR_IOCTL_PP_READ_CONTROL:
1984 if (ioctl(fd, PPIGCTRL, &b) < 0)
1985 return -ENOTSUP;
1986 *(uint8_t *)arg = b;
1987 break;
1988 case CHR_IOCTL_PP_WRITE_CONTROL:
1989 b = *(uint8_t *)arg;
1990 if (ioctl(fd, PPISCTRL, &b) < 0)
1991 return -ENOTSUP;
1992 break;
1993 case CHR_IOCTL_PP_READ_STATUS:
1994 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1995 return -ENOTSUP;
1996 *(uint8_t *)arg = b;
1997 break;
1998 default:
1999 return -ENOTSUP;
2000 }
2001 return 0;
2002}
2003
2004static CharDriverState *qemu_chr_open_pp_fd(int fd,
2005 ChardevCommon *backend,
2006 Error **errp)
2007{
2008 CharDriverState *chr;
2009
2010 chr = qemu_chr_alloc(backend, errp);
2011 if (!chr) {
2012 return NULL;
2013 }
2014 chr->opaque = (void *)(intptr_t)fd;
2015 chr->chr_write = null_chr_write;
2016 chr->chr_ioctl = pp_ioctl;
2017 chr->explicit_be_open = true;
2018 return chr;
2019}
2020#endif
2021
2022#else /* _WIN32 */
2023
2024#define HAVE_CHARDEV_SERIAL 1
2025
2026typedef struct {
2027 int max_size;
2028 HANDLE hcom, hrecv, hsend;
2029 OVERLAPPED orecv;
2030 BOOL fpipe;
2031 DWORD len;
2032
2033 /* Protected by the CharDriverState chr_write_lock. */
2034 OVERLAPPED osend;
2035} WinCharState;
2036
2037typedef struct {
2038 HANDLE hStdIn;
2039 HANDLE hInputReadyEvent;
2040 HANDLE hInputDoneEvent;
2041 HANDLE hInputThread;
2042 uint8_t win_stdio_buf;
2043} WinStdioCharState;
2044
2045#define NSENDBUF 2048
2046#define NRECVBUF 2048
2047#define MAXCONNECT 1
2048#define NTIMEOUT 5000
2049
2050static int win_chr_poll(void *opaque);
2051static int win_chr_pipe_poll(void *opaque);
2052
2053static void win_chr_close(CharDriverState *chr)
2054{
2055 WinCharState *s = chr->opaque;
2056
2057 if (s->hsend) {
2058 CloseHandle(s->hsend);
2059 s->hsend = NULL;
2060 }
2061 if (s->hrecv) {
2062 CloseHandle(s->hrecv);
2063 s->hrecv = NULL;
2064 }
2065 if (s->hcom) {
2066 CloseHandle(s->hcom);
2067 s->hcom = NULL;
2068 }
2069 if (s->fpipe)
2070 qemu_del_polling_cb(win_chr_pipe_poll, chr);
2071 else
2072 qemu_del_polling_cb(win_chr_poll, chr);
2073
2074 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2075}
2076
2077static int win_chr_init(CharDriverState *chr, const char *filename, Error **errp)
2078{
2079 WinCharState *s = chr->opaque;
2080 COMMCONFIG comcfg;
2081 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
2082 COMSTAT comstat;
2083 DWORD size;
2084 DWORD err;
2085
2086 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
2087 if (!s->hsend) {
2088 error_setg(errp, "Failed CreateEvent");
2089 goto fail;
2090 }
2091 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
2092 if (!s->hrecv) {
2093 error_setg(errp, "Failed CreateEvent");
2094 goto fail;
2095 }
2096
2097 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
2098 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
2099 if (s->hcom == INVALID_HANDLE_VALUE) {
2100 error_setg(errp, "Failed CreateFile (%lu)", GetLastError());
2101 s->hcom = NULL;
2102 goto fail;
2103 }
2104
2105 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
2106 error_setg(errp, "Failed SetupComm");
2107 goto fail;
2108 }
2109
2110 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
2111 size = sizeof(COMMCONFIG);
2112 GetDefaultCommConfig(filename, &comcfg, &size);
2113 comcfg.dcb.DCBlength = sizeof(DCB);
2114 CommConfigDialog(filename, NULL, &comcfg);
2115
2116 if (!SetCommState(s->hcom, &comcfg.dcb)) {
2117 error_setg(errp, "Failed SetCommState");
2118 goto fail;
2119 }
2120
2121 if (!SetCommMask(s->hcom, EV_ERR)) {
2122 error_setg(errp, "Failed SetCommMask");
2123 goto fail;
2124 }
2125
2126 cto.ReadIntervalTimeout = MAXDWORD;
2127 if (!SetCommTimeouts(s->hcom, &cto)) {
2128 error_setg(errp, "Failed SetCommTimeouts");
2129 goto fail;
2130 }
2131
2132 if (!ClearCommError(s->hcom, &err, &comstat)) {
2133 error_setg(errp, "Failed ClearCommError");
2134 goto fail;
2135 }
2136 qemu_add_polling_cb(win_chr_poll, chr);
2137 return 0;
2138
2139 fail:
2140 win_chr_close(chr);
2141 return -1;
2142}
2143
2144/* Called with chr_write_lock held. */
2145static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
2146{
2147 WinCharState *s = chr->opaque;
2148 DWORD len, ret, size, err;
2149
2150 len = len1;
2151 ZeroMemory(&s->osend, sizeof(s->osend));
2152 s->osend.hEvent = s->hsend;
2153 while (len > 0) {
2154 if (s->hsend)
2155 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
2156 else
2157 ret = WriteFile(s->hcom, buf, len, &size, NULL);
2158 if (!ret) {
2159 err = GetLastError();
2160 if (err == ERROR_IO_PENDING) {
2161 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
2162 if (ret) {
2163 buf += size;
2164 len -= size;
2165 } else {
2166 break;
2167 }
2168 } else {
2169 break;
2170 }
2171 } else {
2172 buf += size;
2173 len -= size;
2174 }
2175 }
2176 return len1 - len;
2177}
2178
2179static int win_chr_read_poll(CharDriverState *chr)
2180{
2181 WinCharState *s = chr->opaque;
2182
2183 s->max_size = qemu_chr_be_can_write(chr);
2184 return s->max_size;
2185}
2186
2187static void win_chr_readfile(CharDriverState *chr)
2188{
2189 WinCharState *s = chr->opaque;
2190 int ret, err;
2191 uint8_t buf[READ_BUF_LEN];
2192 DWORD size;
2193
2194 ZeroMemory(&s->orecv, sizeof(s->orecv));
2195 s->orecv.hEvent = s->hrecv;
2196 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
2197 if (!ret) {
2198 err = GetLastError();
2199 if (err == ERROR_IO_PENDING) {
2200 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
2201 }
2202 }
2203
2204 if (size > 0) {
2205 qemu_chr_be_write(chr, buf, size);
2206 }
2207}
2208
2209static void win_chr_read(CharDriverState *chr)
2210{
2211 WinCharState *s = chr->opaque;
2212
2213 if (s->len > s->max_size)
2214 s->len = s->max_size;
2215 if (s->len == 0)
2216 return;
2217
2218 win_chr_readfile(chr);
2219}
2220
2221static int win_chr_poll(void *opaque)
2222{
2223 CharDriverState *chr = opaque;
2224 WinCharState *s = chr->opaque;
2225 COMSTAT status;
2226 DWORD comerr;
2227
2228 ClearCommError(s->hcom, &comerr, &status);
2229 if (status.cbInQue > 0) {
2230 s->len = status.cbInQue;
2231 win_chr_read_poll(chr);
2232 win_chr_read(chr);
2233 return 1;
2234 }
2235 return 0;
2236}
2237
2238static CharDriverState *qemu_chr_open_win_path(const char *filename,
2239 ChardevCommon *backend,
2240 Error **errp)
2241{
2242 CharDriverState *chr;
2243 WinCharState *s;
2244
2245 chr = qemu_chr_alloc(backend, errp);
2246 if (!chr) {
2247 return NULL;
2248 }
2249 s = g_new0(WinCharState, 1);
2250 chr->opaque = s;
2251 chr->chr_write = win_chr_write;
2252 chr->chr_close = win_chr_close;
2253
2254 if (win_chr_init(chr, filename, errp) < 0) {
2255 g_free(s);
2256 qemu_chr_free_common(chr);
2257 return NULL;
2258 }
2259 return chr;
2260}
2261
2262static int win_chr_pipe_poll(void *opaque)
2263{
2264 CharDriverState *chr = opaque;
2265 WinCharState *s = chr->opaque;
2266 DWORD size;
2267
2268 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
2269 if (size > 0) {
2270 s->len = size;
2271 win_chr_read_poll(chr);
2272 win_chr_read(chr);
2273 return 1;
2274 }
2275 return 0;
2276}
2277
2278static int win_chr_pipe_init(CharDriverState *chr, const char *filename,
2279 Error **errp)
2280{
2281 WinCharState *s = chr->opaque;
2282 OVERLAPPED ov;
2283 int ret;
2284 DWORD size;
2285 char *openname;
2286
2287 s->fpipe = TRUE;
2288
2289 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
2290 if (!s->hsend) {
2291 error_setg(errp, "Failed CreateEvent");
2292 goto fail;
2293 }
2294 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
2295 if (!s->hrecv) {
2296 error_setg(errp, "Failed CreateEvent");
2297 goto fail;
2298 }
2299
2300 openname = g_strdup_printf("\\\\.\\pipe\\%s", filename);
2301 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
2302 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
2303 PIPE_WAIT,
2304 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
2305 g_free(openname);
2306 if (s->hcom == INVALID_HANDLE_VALUE) {
2307 error_setg(errp, "Failed CreateNamedPipe (%lu)", GetLastError());
2308 s->hcom = NULL;
2309 goto fail;
2310 }
2311
2312 ZeroMemory(&ov, sizeof(ov));
2313 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
2314 ret = ConnectNamedPipe(s->hcom, &ov);
2315 if (ret) {
2316 error_setg(errp, "Failed ConnectNamedPipe");
2317 goto fail;
2318 }
2319
2320 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
2321 if (!ret) {
2322 error_setg(errp, "Failed GetOverlappedResult");
2323 if (ov.hEvent) {
2324 CloseHandle(ov.hEvent);
2325 ov.hEvent = NULL;
2326 }
2327 goto fail;
2328 }
2329
2330 if (ov.hEvent) {
2331 CloseHandle(ov.hEvent);
2332 ov.hEvent = NULL;
2333 }
2334 qemu_add_polling_cb(win_chr_pipe_poll, chr);
2335 return 0;
2336
2337 fail:
2338 win_chr_close(chr);
2339 return -1;
2340}
2341
2342
2343static CharDriverState *qemu_chr_open_pipe(const char *id,
2344 ChardevBackend *backend,
2345 ChardevReturn *ret,
2346 Error **errp)
2347{
2348 ChardevHostdev *opts = backend->u.pipe.data;
2349 const char *filename = opts->device;
2350 CharDriverState *chr;
2351 WinCharState *s;
2352 ChardevCommon *common = qapi_ChardevHostdev_base(opts);
2353
2354 chr = qemu_chr_alloc(common, errp);
2355 if (!chr) {
2356 return NULL;
2357 }
2358 s = g_new0(WinCharState, 1);
2359 chr->opaque = s;
2360 chr->chr_write = win_chr_write;
2361 chr->chr_close = win_chr_close;
2362
2363 if (win_chr_pipe_init(chr, filename, errp) < 0) {
2364 g_free(s);
2365 qemu_chr_free_common(chr);
2366 return NULL;
2367 }
2368 return chr;
2369}
2370
2371static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out,
2372 ChardevCommon *backend,
2373 Error **errp)
2374{
2375 CharDriverState *chr;
2376 WinCharState *s;
2377
2378 chr = qemu_chr_alloc(backend, errp);
2379 if (!chr) {
2380 return NULL;
2381 }
2382 s = g_new0(WinCharState, 1);
2383 s->hcom = fd_out;
2384 chr->opaque = s;
2385 chr->chr_write = win_chr_write;
2386 return chr;
2387}
2388
2389static CharDriverState *qemu_chr_open_win_con(const char *id,
2390 ChardevBackend *backend,
2391 ChardevReturn *ret,
2392 Error **errp)
2393{
2394 ChardevCommon *common = backend->u.console.data;
2395 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE),
2396 common, errp);
2397}
2398
2399static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
2400{
2401 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
2402 DWORD dwSize;
2403 int len1;
2404
2405 len1 = len;
2406
2407 while (len1 > 0) {
2408 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
2409 break;
2410 }
2411 buf += dwSize;
2412 len1 -= dwSize;
2413 }
2414
2415 return len - len1;
2416}
2417
2418static void win_stdio_wait_func(void *opaque)
2419{
2420 CharDriverState *chr = opaque;
2421 WinStdioCharState *stdio = chr->opaque;
2422 INPUT_RECORD buf[4];
2423 int ret;
2424 DWORD dwSize;
2425 int i;
2426
2427 ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize);
2428
2429 if (!ret) {
2430 /* Avoid error storm */
2431 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2432 return;
2433 }
2434
2435 for (i = 0; i < dwSize; i++) {
2436 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2437
2438 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2439 int j;
2440 if (kev->uChar.AsciiChar != 0) {
2441 for (j = 0; j < kev->wRepeatCount; j++) {
2442 if (qemu_chr_be_can_write(chr)) {
2443 uint8_t c = kev->uChar.AsciiChar;
2444 qemu_chr_be_write(chr, &c, 1);
2445 }
2446 }
2447 }
2448 }
2449 }
2450}
2451
2452static DWORD WINAPI win_stdio_thread(LPVOID param)
2453{
2454 CharDriverState *chr = param;
2455 WinStdioCharState *stdio = chr->opaque;
2456 int ret;
2457 DWORD dwSize;
2458
2459 while (1) {
2460
2461 /* Wait for one byte */
2462 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2463
2464 /* Exit in case of error, continue if nothing read */
2465 if (!ret) {
2466 break;
2467 }
2468 if (!dwSize) {
2469 continue;
2470 }
2471
2472 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2473 if (stdio->win_stdio_buf == '\r') {
2474 continue;
2475 }
2476
2477 /* Signal the main thread and wait until the byte was eaten */
2478 if (!SetEvent(stdio->hInputReadyEvent)) {
2479 break;
2480 }
2481 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2482 != WAIT_OBJECT_0) {
2483 break;
2484 }
2485 }
2486
2487 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2488 return 0;
2489}
2490
2491static void win_stdio_thread_wait_func(void *opaque)
2492{
2493 CharDriverState *chr = opaque;
2494 WinStdioCharState *stdio = chr->opaque;
2495
2496 if (qemu_chr_be_can_write(chr)) {
2497 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2498 }
2499
2500 SetEvent(stdio->hInputDoneEvent);
2501}
2502
2503static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2504{
2505 WinStdioCharState *stdio = chr->opaque;
2506 DWORD dwMode = 0;
2507
2508 GetConsoleMode(stdio->hStdIn, &dwMode);
2509
2510 if (echo) {
2511 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2512 } else {
2513 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2514 }
2515}
2516
2517static void win_stdio_close(CharDriverState *chr)
2518{
2519 WinStdioCharState *stdio = chr->opaque;
2520
2521 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2522 CloseHandle(stdio->hInputReadyEvent);
2523 }
2524 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2525 CloseHandle(stdio->hInputDoneEvent);
2526 }
2527 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2528 TerminateThread(stdio->hInputThread, 0);
2529 }
2530
2531 g_free(chr->opaque);
2532}
2533
2534static CharDriverState *qemu_chr_open_stdio(const char *id,
2535 ChardevBackend *backend,
2536 ChardevReturn *ret,
2537 Error **errp)
2538{
2539 CharDriverState *chr;
2540 WinStdioCharState *stdio;
2541 DWORD dwMode;
2542 int is_console = 0;
2543 ChardevCommon *common = qapi_ChardevStdio_base(backend->u.stdio.data);
2544
2545 chr = qemu_chr_alloc(common, errp);
2546 if (!chr) {
2547 return NULL;
2548 }
2549 stdio = g_new0(WinStdioCharState, 1);
2550
2551 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2552 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2553 error_setg(errp, "cannot open stdio: invalid handle");
2554 return NULL;
2555 }
2556
2557 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2558
2559 chr->opaque = stdio;
2560 chr->chr_write = win_stdio_write;
2561 chr->chr_close = win_stdio_close;
2562
2563 if (is_console) {
2564 if (qemu_add_wait_object(stdio->hStdIn,
2565 win_stdio_wait_func, chr)) {
2566 error_setg(errp, "qemu_add_wait_object: failed");
2567 goto err1;
2568 }
2569 } else {
2570 DWORD dwId;
2571
2572 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2573 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2574 if (stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2575 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2576 error_setg(errp, "cannot create event");
2577 goto err2;
2578 }
2579 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2580 win_stdio_thread_wait_func, chr)) {
2581 error_setg(errp, "qemu_add_wait_object: failed");
2582 goto err2;
2583 }
2584 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2585 chr, 0, &dwId);
2586
2587 if (stdio->hInputThread == INVALID_HANDLE_VALUE) {
2588 error_setg(errp, "cannot create stdio thread");
2589 goto err3;
2590 }
2591 }
2592
2593 dwMode |= ENABLE_LINE_INPUT;
2594
2595 if (is_console) {
2596 /* set the terminal in raw mode */
2597 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2598 dwMode |= ENABLE_PROCESSED_INPUT;
2599 }
2600
2601 SetConsoleMode(stdio->hStdIn, dwMode);
2602
2603 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2604 qemu_chr_set_echo_win_stdio(chr, false);
2605
2606 return chr;
2607
2608err3:
2609 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2610err2:
2611 CloseHandle(stdio->hInputReadyEvent);
2612 CloseHandle(stdio->hInputDoneEvent);
2613err1:
2614 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2615 return NULL;
2616}
2617#endif /* !_WIN32 */
2618
2619/***********************************************************/
2620/* UDP Net console */
2621
2622typedef struct {
2623 QIOChannel *ioc;
2624 uint8_t buf[READ_BUF_LEN];
2625 int bufcnt;
2626 int bufptr;
2627 int max_size;
2628} NetCharDriver;
2629
2630/* Called with chr_write_lock held. */
2631static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2632{
2633 NetCharDriver *s = chr->opaque;
2634
2635 return qio_channel_write(
2636 s->ioc, (const char *)buf, len, NULL);
2637}
2638
2639static int udp_chr_read_poll(void *opaque)
2640{
2641 CharDriverState *chr = opaque;
2642 NetCharDriver *s = chr->opaque;
2643
2644 s->max_size = qemu_chr_be_can_write(chr);
2645
2646 /* If there were any stray characters in the queue process them
2647 * first
2648 */
2649 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2650 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2651 s->bufptr++;
2652 s->max_size = qemu_chr_be_can_write(chr);
2653 }
2654 return s->max_size;
2655}
2656
2657static gboolean udp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
2658{
2659 CharDriverState *chr = opaque;
2660 NetCharDriver *s = chr->opaque;
2661 ssize_t ret;
2662
2663 if (s->max_size == 0) {
2664 return TRUE;
2665 }
2666 ret = qio_channel_read(
2667 s->ioc, (char *)s->buf, sizeof(s->buf), NULL);
2668 if (ret <= 0) {
2669 remove_fd_in_watch(chr);
2670 return FALSE;
2671 }
2672 s->bufcnt = ret;
2673
2674 s->bufptr = 0;
2675 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2676 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2677 s->bufptr++;
2678 s->max_size = qemu_chr_be_can_write(chr);
2679 }
2680
2681 return TRUE;
2682}
2683
2684static void udp_chr_update_read_handler(CharDriverState *chr,
2685 GMainContext *context,
2686 int tag)
2687{
2688 NetCharDriver *s = chr->opaque;
2689
2690 remove_fd_in_watch(chr);
2691 if (s->ioc) {
2692 chr->fd_in_tag = io_add_watch_poll(s->ioc,
2693 udp_chr_read_poll,
2694 udp_chr_read, chr,
2695 context);
2696 }
2697}
2698
2699static void udp_chr_close(CharDriverState *chr)
2700{
2701 NetCharDriver *s = chr->opaque;
2702
2703 remove_fd_in_watch(chr);
2704 if (s->ioc) {
2705 object_unref(OBJECT(s->ioc));
2706 }
2707 g_free(s);
2708 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2709}
2710
2711static CharDriverState *qemu_chr_open_udp(QIOChannelSocket *sioc,
2712 ChardevCommon *backend,
2713 Error **errp)
2714{
2715 CharDriverState *chr = NULL;
2716 NetCharDriver *s = NULL;
2717
2718 chr = qemu_chr_alloc(backend, errp);
2719 if (!chr) {
2720 return NULL;
2721 }
2722 s = g_new0(NetCharDriver, 1);
2723
2724 s->ioc = QIO_CHANNEL(sioc);
2725 s->bufcnt = 0;
2726 s->bufptr = 0;
2727 chr->opaque = s;
2728 chr->chr_write = udp_chr_write;
2729 chr->chr_update_read_handler = udp_chr_update_read_handler;
2730 chr->chr_close = udp_chr_close;
2731 /* be isn't opened until we get a connection */
2732 chr->explicit_be_open = true;
2733 return chr;
2734}
2735
2736/***********************************************************/
2737/* TCP Net console */
2738
2739typedef struct {
2740 QIOChannel *ioc; /* Client I/O channel */
2741 QIOChannelSocket *sioc; /* Client master channel */
2742 QIOChannelSocket *listen_ioc;
2743 guint listen_tag;
2744 QCryptoTLSCreds *tls_creds;
2745 int connected;
2746 int max_size;
2747 int do_telnetopt;
2748 int do_nodelay;
2749 int is_unix;
2750 int *read_msgfds;
2751 size_t read_msgfds_num;
2752 int *write_msgfds;
2753 size_t write_msgfds_num;
2754
2755 SocketAddress *addr;
2756 bool is_listen;
2757 bool is_telnet;
2758
2759 guint reconnect_timer;
2760 int64_t reconnect_time;
2761 bool connect_err_reported;
2762} TCPCharDriver;
2763
2764static gboolean socket_reconnect_timeout(gpointer opaque);
2765
2766static void qemu_chr_socket_restart_timer(CharDriverState *chr)
2767{
2768 TCPCharDriver *s = chr->opaque;
2769 assert(s->connected == 0);
2770 s->reconnect_timer = g_timeout_add_seconds(s->reconnect_time,
2771 socket_reconnect_timeout, chr);
2772}
2773
2774static void check_report_connect_error(CharDriverState *chr,
2775 Error *err)
2776{
2777 TCPCharDriver *s = chr->opaque;
2778
2779 if (!s->connect_err_reported) {
2780 error_report("Unable to connect character device %s: %s",
2781 chr->label, error_get_pretty(err));
2782 s->connect_err_reported = true;
2783 }
2784 qemu_chr_socket_restart_timer(chr);
2785}
2786
2787static gboolean tcp_chr_accept(QIOChannel *chan,
2788 GIOCondition cond,
2789 void *opaque);
2790
2791/* Called with chr_write_lock held. */
2792static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2793{
2794 TCPCharDriver *s = chr->opaque;
2795 if (s->connected) {
2796 int ret = io_channel_send_full(s->ioc, buf, len,
2797 s->write_msgfds,
2798 s->write_msgfds_num);
2799
2800 /* free the written msgfds, no matter what */
2801 if (s->write_msgfds_num) {
2802 g_free(s->write_msgfds);
2803 s->write_msgfds = 0;
2804 s->write_msgfds_num = 0;
2805 }
2806
2807 return ret;
2808 } else {
2809 /* XXX: indicate an error ? */
2810 return len;
2811 }
2812}
2813
2814static int tcp_chr_read_poll(void *opaque)
2815{
2816 CharDriverState *chr = opaque;
2817 TCPCharDriver *s = chr->opaque;
2818 if (!s->connected)
2819 return 0;
2820 s->max_size = qemu_chr_be_can_write(chr);
2821 return s->max_size;
2822}
2823
2824#define IAC 255
2825#define IAC_BREAK 243
2826static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2827 TCPCharDriver *s,
2828 uint8_t *buf, int *size)
2829{
2830 /* Handle any telnet client's basic IAC options to satisfy char by
2831 * char mode with no echo. All IAC options will be removed from
2832 * the buf and the do_telnetopt variable will be used to track the
2833 * state of the width of the IAC information.
2834 *
2835 * IAC commands come in sets of 3 bytes with the exception of the
2836 * "IAC BREAK" command and the double IAC.
2837 */
2838
2839 int i;
2840 int j = 0;
2841
2842 for (i = 0; i < *size; i++) {
2843 if (s->do_telnetopt > 1) {
2844 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2845 /* Double IAC means send an IAC */
2846 if (j != i)
2847 buf[j] = buf[i];
2848 j++;
2849 s->do_telnetopt = 1;
2850 } else {
2851 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2852 /* Handle IAC break commands by sending a serial break */
2853 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2854 s->do_telnetopt++;
2855 }
2856 s->do_telnetopt++;
2857 }
2858 if (s->do_telnetopt >= 4) {
2859 s->do_telnetopt = 1;
2860 }
2861 } else {
2862 if ((unsigned char)buf[i] == IAC) {
2863 s->do_telnetopt = 2;
2864 } else {
2865 if (j != i)
2866 buf[j] = buf[i];
2867 j++;
2868 }
2869 }
2870 }
2871 *size = j;
2872}
2873
2874static int tcp_get_msgfds(CharDriverState *chr, int *fds, int num)
2875{
2876 TCPCharDriver *s = chr->opaque;
2877 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
2878
2879 assert(num <= TCP_MAX_FDS);
2880
2881 if (to_copy) {
2882 int i;
2883
2884 memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
2885
2886 /* Close unused fds */
2887 for (i = to_copy; i < s->read_msgfds_num; i++) {
2888 close(s->read_msgfds[i]);
2889 }
2890
2891 g_free(s->read_msgfds);
2892 s->read_msgfds = 0;
2893 s->read_msgfds_num = 0;
2894 }
2895
2896 return to_copy;
2897}
2898
2899static int tcp_set_msgfds(CharDriverState *chr, int *fds, int num)
2900{
2901 TCPCharDriver *s = chr->opaque;
2902
2903 /* clear old pending fd array */
2904 g_free(s->write_msgfds);
2905 s->write_msgfds = NULL;
2906 s->write_msgfds_num = 0;
2907
2908 if (!s->connected ||
2909 !qio_channel_has_feature(s->ioc,
2910 QIO_CHANNEL_FEATURE_FD_PASS)) {
2911 return -1;
2912 }
2913
2914 if (num) {
2915 s->write_msgfds = g_new(int, num);
2916 memcpy(s->write_msgfds, fds, num * sizeof(int));
2917 }
2918
2919 s->write_msgfds_num = num;
2920
2921 return 0;
2922}
2923
2924static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2925{
2926 TCPCharDriver *s = chr->opaque;
2927 struct iovec iov = { .iov_base = buf, .iov_len = len };
2928 int ret;
2929 size_t i;
2930 int *msgfds = NULL;
2931 size_t msgfds_num = 0;
2932
2933 if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) {
2934 ret = qio_channel_readv_full(s->ioc, &iov, 1,
2935 &msgfds, &msgfds_num,
2936 NULL);
2937 } else {
2938 ret = qio_channel_readv_full(s->ioc, &iov, 1,
2939 NULL, NULL,
2940 NULL);
2941 }
2942
2943 if (ret == QIO_CHANNEL_ERR_BLOCK) {
2944 errno = EAGAIN;
2945 ret = -1;
2946 } else if (ret == -1) {
2947 errno = EIO;
2948 }
2949
2950 if (msgfds_num) {
2951 /* close and clean read_msgfds */
2952 for (i = 0; i < s->read_msgfds_num; i++) {
2953 close(s->read_msgfds[i]);
2954 }
2955
2956 if (s->read_msgfds_num) {
2957 g_free(s->read_msgfds);
2958 }
2959
2960 s->read_msgfds = msgfds;
2961 s->read_msgfds_num = msgfds_num;
2962 }
2963
2964 for (i = 0; i < s->read_msgfds_num; i++) {
2965 int fd = s->read_msgfds[i];
2966 if (fd < 0) {
2967 continue;
2968 }
2969
2970 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2971 qemu_set_block(fd);
2972
2973#ifndef MSG_CMSG_CLOEXEC
2974 qemu_set_cloexec(fd);
2975#endif
2976 }
2977
2978 return ret;
2979}
2980
2981static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2982{
2983 TCPCharDriver *s = chr->opaque;
2984 return qio_channel_create_watch(s->ioc, cond);
2985}
2986
2987static void tcp_chr_free_connection(CharDriverState *chr)
2988{
2989 TCPCharDriver *s = chr->opaque;
2990 int i;
2991
2992 if (!s->connected) {
2993 return;
2994 }
2995
2996 if (s->read_msgfds_num) {
2997 for (i = 0; i < s->read_msgfds_num; i++) {
2998 close(s->read_msgfds[i]);
2999 }
3000 g_free(s->read_msgfds);
3001 s->read_msgfds = NULL;
3002 s->read_msgfds_num = 0;
3003 }
3004
3005 tcp_set_msgfds(chr, NULL, 0);
3006 remove_fd_in_watch(chr);
3007 object_unref(OBJECT(s->sioc));
3008 s->sioc = NULL;
3009 object_unref(OBJECT(s->ioc));
3010 s->ioc = NULL;
3011 g_free(chr->filename);
3012 chr->filename = NULL;
3013 s->connected = 0;
3014}
3015
3016static void tcp_chr_disconnect(CharDriverState *chr)
3017{
3018 TCPCharDriver *s = chr->opaque;
3019
3020 if (!s->connected) {
3021 return;
3022 }
3023
3024 tcp_chr_free_connection(chr);
3025
3026 if (s->listen_ioc) {
3027 s->listen_tag = qio_channel_add_watch(
3028 QIO_CHANNEL(s->listen_ioc), G_IO_IN, tcp_chr_accept, chr, NULL);
3029 }
3030 chr->filename = SocketAddress_to_str("disconnected:", s->addr,
3031 s->is_listen, s->is_telnet);
3032 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
3033 if (s->reconnect_time) {
3034 qemu_chr_socket_restart_timer(chr);
3035 }
3036}
3037
3038static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
3039{
3040 CharDriverState *chr = opaque;
3041 TCPCharDriver *s = chr->opaque;
3042 uint8_t buf[READ_BUF_LEN];
3043 int len, size;
3044
3045 if (!s->connected || s->max_size <= 0) {
3046 return TRUE;
3047 }
3048 len = sizeof(buf);
3049 if (len > s->max_size)
3050 len = s->max_size;
3051 size = tcp_chr_recv(chr, (void *)buf, len);
3052 if (size == 0 || size == -1) {
3053 /* connection closed */
3054 tcp_chr_disconnect(chr);
3055 } else if (size > 0) {
3056 if (s->do_telnetopt)
3057 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
3058 if (size > 0)
3059 qemu_chr_be_write(chr, buf, size);
3060 }
3061
3062 return TRUE;
3063}
3064
3065static int tcp_chr_sync_read(CharDriverState *chr, const uint8_t *buf, int len)
3066{
3067 TCPCharDriver *s = chr->opaque;
3068 int size;
3069
3070 if (!s->connected) {
3071 return 0;
3072 }
3073
3074 size = tcp_chr_recv(chr, (void *) buf, len);
3075 if (size == 0) {
3076 /* connection closed */
3077 tcp_chr_disconnect(chr);
3078 }
3079
3080 return size;
3081}
3082
3083static void tcp_chr_connect(void *opaque)
3084{
3085 CharDriverState *chr = opaque;
3086 TCPCharDriver *s = chr->opaque;
3087
3088 g_free(chr->filename);
3089 chr->filename = sockaddr_to_str(
3090 &s->sioc->localAddr, s->sioc->localAddrLen,
3091 &s->sioc->remoteAddr, s->sioc->remoteAddrLen,
3092 s->is_listen, s->is_telnet);
3093
3094 s->connected = 1;
3095 if (s->ioc) {
3096 chr->fd_in_tag = io_add_watch_poll(s->ioc,
3097 tcp_chr_read_poll,
3098 tcp_chr_read,
3099 chr, NULL);
3100 }
3101 qemu_chr_be_generic_open(chr);
3102}
3103
3104static void tcp_chr_update_read_handler(CharDriverState *chr,
3105 GMainContext *context,
3106 int tag)
3107{
3108 TCPCharDriver *s = chr->opaque;
3109
3110 if (!s->connected) {
3111 return;
3112 }
3113
3114 remove_fd_in_watch(chr);
3115 if (s->ioc) {
3116 chr->fd_in_tag = io_add_watch_poll(s->ioc,
3117 tcp_chr_read_poll,
3118 tcp_chr_read, chr,
3119 context);
3120 }
3121}
3122
3123typedef struct {
3124 CharDriverState *chr;
3125 char buf[12];
3126 size_t buflen;
3127} TCPCharDriverTelnetInit;
3128
3129static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc,
3130 GIOCondition cond G_GNUC_UNUSED,
3131 gpointer user_data)
3132{
3133 TCPCharDriverTelnetInit *init = user_data;
3134 ssize_t ret;
3135
3136 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL);
3137 if (ret < 0) {
3138 if (ret == QIO_CHANNEL_ERR_BLOCK) {
3139 ret = 0;
3140 } else {
3141 tcp_chr_disconnect(init->chr);
3142 return FALSE;
3143 }
3144 }
3145 init->buflen -= ret;
3146
3147 if (init->buflen == 0) {
3148 tcp_chr_connect(init->chr);
3149 return FALSE;
3150 }
3151
3152 memmove(init->buf, init->buf + ret, init->buflen);
3153
3154 return TRUE;
3155}
3156
3157static void tcp_chr_telnet_init(CharDriverState *chr)
3158{
3159 TCPCharDriver *s = chr->opaque;
3160 TCPCharDriverTelnetInit *init =
3161 g_new0(TCPCharDriverTelnetInit, 1);
3162 size_t n = 0;
3163
3164 init->chr = chr;
3165 init->buflen = 12;
3166
3167#define IACSET(x, a, b, c) \
3168 do { \
3169 x[n++] = a; \
3170 x[n++] = b; \
3171 x[n++] = c; \
3172 } while (0)
3173
3174 /* Prep the telnet negotion to put telnet in binary,
3175 * no echo, single char mode */
3176 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
3177 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
3178 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
3179 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
3180
3181#undef IACSET
3182
3183 qio_channel_add_watch(
3184 s->ioc, G_IO_OUT,
3185 tcp_chr_telnet_init_io,
3186 init, NULL);
3187}
3188
3189
3190static void tcp_chr_tls_handshake(Object *source,
3191 Error *err,
3192 gpointer user_data)
3193{
3194 CharDriverState *chr = user_data;
3195 TCPCharDriver *s = chr->opaque;
3196
3197 if (err) {
3198 tcp_chr_disconnect(chr);
3199 } else {
3200 if (s->do_telnetopt) {
3201 tcp_chr_telnet_init(chr);
3202 } else {
3203 tcp_chr_connect(chr);
3204 }
3205 }
3206}
3207
3208
3209static void tcp_chr_tls_init(CharDriverState *chr)
3210{
3211 TCPCharDriver *s = chr->opaque;
3212 QIOChannelTLS *tioc;
3213 Error *err = NULL;
3214
3215 if (s->is_listen) {
3216 tioc = qio_channel_tls_new_server(
3217 s->ioc, s->tls_creds,
3218 NULL, /* XXX Use an ACL */
3219 &err);
3220 } else {
3221 tioc = qio_channel_tls_new_client(
3222 s->ioc, s->tls_creds,
3223 s->addr->u.inet.data->host,
3224 &err);
3225 }
3226 if (tioc == NULL) {
3227 error_free(err);
3228 tcp_chr_disconnect(chr);
3229 return;
3230 }
3231 object_unref(OBJECT(s->ioc));
3232 s->ioc = QIO_CHANNEL(tioc);
3233
3234 qio_channel_tls_handshake(tioc,
3235 tcp_chr_tls_handshake,
3236 chr,
3237 NULL);
3238}
3239
3240
3241static int tcp_chr_new_client(CharDriverState *chr, QIOChannelSocket *sioc)
3242{
3243 TCPCharDriver *s = chr->opaque;
3244 if (s->ioc != NULL) {
3245 return -1;
3246 }
3247
3248 s->ioc = QIO_CHANNEL(sioc);
3249 object_ref(OBJECT(sioc));
3250 s->sioc = sioc;
3251 object_ref(OBJECT(sioc));
3252
3253 qio_channel_set_blocking(s->ioc, false, NULL);
3254
3255 if (s->do_nodelay) {
3256 qio_channel_set_delay(s->ioc, false);
3257 }
3258 if (s->listen_tag) {
3259 g_source_remove(s->listen_tag);
3260 s->listen_tag = 0;
3261 }
3262
3263 if (s->tls_creds) {
3264 tcp_chr_tls_init(chr);
3265 } else {
3266 if (s->do_telnetopt) {
3267 tcp_chr_telnet_init(chr);
3268 } else {
3269 tcp_chr_connect(chr);
3270 }
3271 }
3272
3273 return 0;
3274}
3275
3276
3277static int tcp_chr_add_client(CharDriverState *chr, int fd)
3278{
3279 int ret;
3280 QIOChannelSocket *sioc;
3281
3282 sioc = qio_channel_socket_new_fd(fd, NULL);
3283 if (!sioc) {
3284 return -1;
3285 }
3286 ret = tcp_chr_new_client(chr, sioc);
3287 object_unref(OBJECT(sioc));
3288 return ret;
3289}
3290
3291static gboolean tcp_chr_accept(QIOChannel *channel,
3292 GIOCondition cond,
3293 void *opaque)
3294{
3295 CharDriverState *chr = opaque;
3296 QIOChannelSocket *sioc;
3297
3298 sioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(channel),
3299 NULL);
3300 if (!sioc) {
3301 return TRUE;
3302 }
3303
3304 tcp_chr_new_client(chr, sioc);
3305
3306 object_unref(OBJECT(sioc));
3307
3308 return TRUE;
3309}
3310
3311static int tcp_chr_wait_connected(CharDriverState *chr, Error **errp)
3312{
3313 TCPCharDriver *s = chr->opaque;
3314 QIOChannelSocket *sioc;
3315
3316 /* It can't wait on s->connected, since it is set asynchronously
3317 * in TLS and telnet cases, only wait for an accepted socket */
3318 while (!s->ioc) {
3319 if (s->is_listen) {
3320 fprintf(stderr, "QEMU waiting for connection on: %s\n",
3321 chr->filename);
3322 qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), true, NULL);
3323 tcp_chr_accept(QIO_CHANNEL(s->listen_ioc), G_IO_IN, chr);
3324 qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), false, NULL);
3325 } else {
3326 sioc = qio_channel_socket_new();
3327 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) {
3328 object_unref(OBJECT(sioc));
3329 return -1;
3330 }
3331 tcp_chr_new_client(chr, sioc);
3332 object_unref(OBJECT(sioc));
3333 }
3334 }
3335
3336 return 0;
3337}
3338
3339static int qemu_chr_wait_connected(CharDriverState *chr, Error **errp)
3340{
3341 if (chr->chr_wait_connected) {
3342 return chr->chr_wait_connected(chr, errp);
3343 }
3344
3345 return 0;
3346}
3347
3348int qemu_chr_fe_wait_connected(CharBackend *be, Error **errp)
3349{
3350 return qemu_chr_wait_connected(be->chr, errp);
3351}
3352
3353static void tcp_chr_close(CharDriverState *chr)
3354{
3355 TCPCharDriver *s = chr->opaque;
3356
3357 tcp_chr_free_connection(chr);
3358
3359 if (s->reconnect_timer) {
3360 g_source_remove(s->reconnect_timer);
3361 s->reconnect_timer = 0;
3362 }
3363 qapi_free_SocketAddress(s->addr);
3364 if (s->listen_tag) {
3365 g_source_remove(s->listen_tag);
3366 s->listen_tag = 0;
3367 }
3368 if (s->listen_ioc) {
3369 object_unref(OBJECT(s->listen_ioc));
3370 }
3371 if (s->tls_creds) {
3372 object_unref(OBJECT(s->tls_creds));
3373 }
3374 g_free(s);
3375 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
3376}
3377
3378
3379static void qemu_chr_socket_connected(Object *src, Error *err, void *opaque)
3380{
3381 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(src);
3382 CharDriverState *chr = opaque;
3383 TCPCharDriver *s = chr->opaque;
3384
3385 if (err) {
3386 check_report_connect_error(chr, err);
3387 object_unref(src);
3388 return;
3389 }
3390
3391 s->connect_err_reported = false;
3392 tcp_chr_new_client(chr, sioc);
3393 object_unref(OBJECT(sioc));
3394}
3395
3396
3397/*********************************************************/
3398/* Ring buffer chardev */
3399
3400typedef struct {
3401 size_t size;
3402 size_t prod;
3403 size_t cons;
3404 uint8_t *cbuf;
3405} RingBufCharDriver;
3406
3407static size_t ringbuf_count(const CharDriverState *chr)
3408{
3409 const RingBufCharDriver *d = chr->opaque;
3410
3411 return d->prod - d->cons;
3412}
3413
3414/* Called with chr_write_lock held. */
3415static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
3416{
3417 RingBufCharDriver *d = chr->opaque;
3418 int i;
3419
3420 if (!buf || (len < 0)) {
3421 return -1;
3422 }
3423
3424 for (i = 0; i < len; i++ ) {
3425 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
3426 if (d->prod - d->cons > d->size) {
3427 d->cons = d->prod - d->size;
3428 }
3429 }
3430
3431 return len;
3432}
3433
3434static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
3435{
3436 RingBufCharDriver *d = chr->opaque;
3437 int i;
3438
3439 qemu_mutex_lock(&chr->chr_write_lock);
3440 for (i = 0; i < len && d->cons != d->prod; i++) {
3441 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
3442 }
3443 qemu_mutex_unlock(&chr->chr_write_lock);
3444
3445 return i;
3446}
3447
3448static void ringbuf_chr_close(struct CharDriverState *chr)
3449{
3450 RingBufCharDriver *d = chr->opaque;
3451
3452 g_free(d->cbuf);
3453 g_free(d);
3454 chr->opaque = NULL;
3455}
3456
3457static CharDriverState *qemu_chr_open_ringbuf(const char *id,
3458 ChardevBackend *backend,
3459 ChardevReturn *ret,
3460 Error **errp)
3461{
3462 ChardevRingbuf *opts = backend->u.ringbuf.data;
3463 ChardevCommon *common = qapi_ChardevRingbuf_base(opts);
3464 CharDriverState *chr;
3465 RingBufCharDriver *d;
3466
3467 chr = qemu_chr_alloc(common, errp);
3468 if (!chr) {
3469 return NULL;
3470 }
3471 d = g_malloc(sizeof(*d));
3472
3473 d->size = opts->has_size ? opts->size : 65536;
3474
3475 /* The size must be power of 2 */
3476 if (d->size & (d->size - 1)) {
3477 error_setg(errp, "size of ringbuf chardev must be power of two");
3478 goto fail;
3479 }
3480
3481 d->prod = 0;
3482 d->cons = 0;
3483 d->cbuf = g_malloc0(d->size);
3484
3485 chr->opaque = d;
3486 chr->chr_write = ringbuf_chr_write;
3487 chr->chr_close = ringbuf_chr_close;
3488
3489 return chr;
3490
3491fail:
3492 g_free(d);
3493 qemu_chr_free_common(chr);
3494 return NULL;
3495}
3496
3497bool chr_is_ringbuf(const CharDriverState *chr)
3498{
3499 return chr->chr_write == ringbuf_chr_write;
3500}
3501
3502void qmp_ringbuf_write(const char *device, const char *data,
3503 bool has_format, enum DataFormat format,
3504 Error **errp)
3505{
3506 CharDriverState *chr;
3507 const uint8_t *write_data;
3508 int ret;
3509 gsize write_count;
3510
3511 chr = qemu_chr_find(device);
3512 if (!chr) {
3513 error_setg(errp, "Device '%s' not found", device);
3514 return;
3515 }
3516
3517 if (!chr_is_ringbuf(chr)) {
3518 error_setg(errp,"%s is not a ringbuf device", device);
3519 return;
3520 }
3521
3522 if (has_format && (format == DATA_FORMAT_BASE64)) {
3523 write_data = qbase64_decode(data, -1,
3524 &write_count,
3525 errp);
3526 if (!write_data) {
3527 return;
3528 }
3529 } else {
3530 write_data = (uint8_t *)data;
3531 write_count = strlen(data);
3532 }
3533
3534 ret = ringbuf_chr_write(chr, write_data, write_count);
3535
3536 if (write_data != (uint8_t *)data) {
3537 g_free((void *)write_data);
3538 }
3539
3540 if (ret < 0) {
3541 error_setg(errp, "Failed to write to device %s", device);
3542 return;
3543 }
3544}
3545
3546char *qmp_ringbuf_read(const char *device, int64_t size,
3547 bool has_format, enum DataFormat format,
3548 Error **errp)
3549{
3550 CharDriverState *chr;
3551 uint8_t *read_data;
3552 size_t count;
3553 char *data;
3554
3555 chr = qemu_chr_find(device);
3556 if (!chr) {
3557 error_setg(errp, "Device '%s' not found", device);
3558 return NULL;
3559 }
3560
3561 if (!chr_is_ringbuf(chr)) {
3562 error_setg(errp,"%s is not a ringbuf device", device);
3563 return NULL;
3564 }
3565
3566 if (size <= 0) {
3567 error_setg(errp, "size must be greater than zero");
3568 return NULL;
3569 }
3570
3571 count = ringbuf_count(chr);
3572 size = size > count ? count : size;
3573 read_data = g_malloc(size + 1);
3574
3575 ringbuf_chr_read(chr, read_data, size);
3576
3577 if (has_format && (format == DATA_FORMAT_BASE64)) {
3578 data = g_base64_encode(read_data, size);
3579 g_free(read_data);
3580 } else {
3581 /*
3582 * FIXME should read only complete, valid UTF-8 characters up
3583 * to @size bytes. Invalid sequences should be replaced by a
3584 * suitable replacement character. Except when (and only
3585 * when) ring buffer lost characters since last read, initial
3586 * continuation characters should be dropped.
3587 */
3588 read_data[size] = 0;
3589 data = (char *)read_data;
3590 }
3591
3592 return data;
3593}
3594
3595QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
3596{
3597 char host[65], port[33], width[8], height[8];
3598 int pos;
3599 const char *p;
3600 QemuOpts *opts;
3601 Error *local_err = NULL;
3602
3603 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
3604 if (local_err) {
3605 error_report_err(local_err);
3606 return NULL;
3607 }
3608
3609 if (strstart(filename, "mon:", &p)) {
3610 filename = p;
3611 qemu_opt_set(opts, "mux", "on", &error_abort);
3612 if (strcmp(filename, "stdio") == 0) {
3613 /* Monitor is muxed to stdio: do not exit on Ctrl+C by default
3614 * but pass it to the guest. Handle this only for compat syntax,
3615 * for -chardev syntax we have special option for this.
3616 * This is what -nographic did, redirecting+muxing serial+monitor
3617 * to stdio causing Ctrl+C to be passed to guest. */
3618 qemu_opt_set(opts, "signal", "off", &error_abort);
3619 }
3620 }
3621
3622 if (strcmp(filename, "null") == 0 ||
3623 strcmp(filename, "pty") == 0 ||
3624 strcmp(filename, "msmouse") == 0 ||
3625 strcmp(filename, "braille") == 0 ||
3626 strcmp(filename, "testdev") == 0 ||
3627 strcmp(filename, "stdio") == 0) {
3628 qemu_opt_set(opts, "backend", filename, &error_abort);
3629 return opts;
3630 }
3631 if (strstart(filename, "vc", &p)) {
3632 qemu_opt_set(opts, "backend", "vc", &error_abort);
3633 if (*p == ':') {
3634 if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
3635 /* pixels */
3636 qemu_opt_set(opts, "width", width, &error_abort);
3637 qemu_opt_set(opts, "height", height, &error_abort);
3638 } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
3639 /* chars */
3640 qemu_opt_set(opts, "cols", width, &error_abort);
3641 qemu_opt_set(opts, "rows", height, &error_abort);
3642 } else {
3643 goto fail;
3644 }
3645 }
3646 return opts;
3647 }
3648 if (strcmp(filename, "con:") == 0) {
3649 qemu_opt_set(opts, "backend", "console", &error_abort);
3650 return opts;
3651 }
3652 if (strstart(filename, "COM", NULL)) {
3653 qemu_opt_set(opts, "backend", "serial", &error_abort);
3654 qemu_opt_set(opts, "path", filename, &error_abort);
3655 return opts;
3656 }
3657 if (strstart(filename, "file:", &p)) {
3658 qemu_opt_set(opts, "backend", "file", &error_abort);
3659 qemu_opt_set(opts, "path", p, &error_abort);
3660 return opts;
3661 }
3662 if (strstart(filename, "pipe:", &p)) {
3663 qemu_opt_set(opts, "backend", "pipe", &error_abort);
3664 qemu_opt_set(opts, "path", p, &error_abort);
3665 return opts;
3666 }
3667 if (strstart(filename, "tcp:", &p) ||
3668 strstart(filename, "telnet:", &p)) {
3669 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3670 host[0] = 0;
3671 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3672 goto fail;
3673 }
3674 qemu_opt_set(opts, "backend", "socket", &error_abort);
3675 qemu_opt_set(opts, "host", host, &error_abort);
3676 qemu_opt_set(opts, "port", port, &error_abort);
3677 if (p[pos] == ',') {
3678 qemu_opts_do_parse(opts, p+pos+1, NULL, &local_err);
3679 if (local_err) {
3680 error_report_err(local_err);
3681 goto fail;
3682 }
3683 }
3684 if (strstart(filename, "telnet:", &p))
3685 qemu_opt_set(opts, "telnet", "on", &error_abort);
3686 return opts;
3687 }
3688 if (strstart(filename, "udp:", &p)) {
3689 qemu_opt_set(opts, "backend", "udp", &error_abort);
3690 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3691 host[0] = 0;
3692 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3693 goto fail;
3694 }
3695 }
3696 qemu_opt_set(opts, "host", host, &error_abort);
3697 qemu_opt_set(opts, "port", port, &error_abort);
3698 if (p[pos] == '@') {
3699 p += pos + 1;
3700 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3701 host[0] = 0;
3702 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3703 goto fail;
3704 }
3705 }
3706 qemu_opt_set(opts, "localaddr", host, &error_abort);
3707 qemu_opt_set(opts, "localport", port, &error_abort);
3708 }
3709 return opts;
3710 }
3711 if (strstart(filename, "unix:", &p)) {
3712 qemu_opt_set(opts, "backend", "socket", &error_abort);
3713 qemu_opts_do_parse(opts, p, "path", &local_err);
3714 if (local_err) {
3715 error_report_err(local_err);
3716 goto fail;
3717 }
3718 return opts;
3719 }
3720 if (strstart(filename, "/dev/parport", NULL) ||
3721 strstart(filename, "/dev/ppi", NULL)) {
3722 qemu_opt_set(opts, "backend", "parport", &error_abort);
3723 qemu_opt_set(opts, "path", filename, &error_abort);
3724 return opts;
3725 }
3726 if (strstart(filename, "/dev/", NULL)) {
3727 qemu_opt_set(opts, "backend", "tty", &error_abort);
3728 qemu_opt_set(opts, "path", filename, &error_abort);
3729 return opts;
3730 }
3731
3732fail:
3733 qemu_opts_del(opts);
3734 return NULL;
3735}
3736
3737void qemu_chr_parse_common(QemuOpts *opts, ChardevCommon *backend)
3738{
3739 const char *logfile = qemu_opt_get(opts, "logfile");
3740
3741 backend->has_logfile = logfile != NULL;
3742 backend->logfile = logfile ? g_strdup(logfile) : NULL;
3743
3744 backend->has_logappend = true;
3745 backend->logappend = qemu_opt_get_bool(opts, "logappend", false);
3746}
3747
3748
3749static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3750 Error **errp)
3751{
3752 const char *path = qemu_opt_get(opts, "path");
3753 ChardevFile *file;
3754
3755 if (path == NULL) {
3756 error_setg(errp, "chardev: file: no filename given");
3757 return;
3758 }
3759 file = backend->u.file.data = g_new0(ChardevFile, 1);
3760 qemu_chr_parse_common(opts, qapi_ChardevFile_base(file));
3761 file->out = g_strdup(path);
3762
3763 file->has_append = true;
3764 file->append = qemu_opt_get_bool(opts, "append", false);
3765}
3766
3767static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3768 Error **errp)
3769{
3770 ChardevStdio *stdio;
3771
3772 stdio = backend->u.stdio.data = g_new0(ChardevStdio, 1);
3773 qemu_chr_parse_common(opts, qapi_ChardevStdio_base(stdio));
3774 stdio->has_signal = true;
3775 stdio->signal = qemu_opt_get_bool(opts, "signal", true);
3776}
3777
3778#ifdef HAVE_CHARDEV_SERIAL
3779static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3780 Error **errp)
3781{
3782 const char *device = qemu_opt_get(opts, "path");
3783 ChardevHostdev *serial;
3784
3785 if (device == NULL) {
3786 error_setg(errp, "chardev: serial/tty: no device path given");
3787 return;
3788 }
3789 serial = backend->u.serial.data = g_new0(ChardevHostdev, 1);
3790 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(serial));
3791 serial->device = g_strdup(device);
3792}
3793#endif
3794
3795#ifdef HAVE_CHARDEV_PARPORT
3796static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3797 Error **errp)
3798{
3799 const char *device = qemu_opt_get(opts, "path");
3800 ChardevHostdev *parallel;
3801
3802 if (device == NULL) {
3803 error_setg(errp, "chardev: parallel: no device path given");
3804 return;
3805 }
3806 parallel = backend->u.parallel.data = g_new0(ChardevHostdev, 1);
3807 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(parallel));
3808 parallel->device = g_strdup(device);
3809}
3810#endif
3811
3812static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3813 Error **errp)
3814{
3815 const char *device = qemu_opt_get(opts, "path");
3816 ChardevHostdev *dev;
3817
3818 if (device == NULL) {
3819 error_setg(errp, "chardev: pipe: no device path given");
3820 return;
3821 }
3822 dev = backend->u.pipe.data = g_new0(ChardevHostdev, 1);
3823 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(dev));
3824 dev->device = g_strdup(device);
3825}
3826
3827static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3828 Error **errp)
3829{
3830 int val;
3831 ChardevRingbuf *ringbuf;
3832
3833 ringbuf = backend->u.ringbuf.data = g_new0(ChardevRingbuf, 1);
3834 qemu_chr_parse_common(opts, qapi_ChardevRingbuf_base(ringbuf));
3835
3836 val = qemu_opt_get_size(opts, "size", 0);
3837 if (val != 0) {
3838 ringbuf->has_size = true;
3839 ringbuf->size = val;
3840 }
3841}
3842
3843static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
3844 Error **errp)
3845{
3846 const char *chardev = qemu_opt_get(opts, "chardev");
3847 ChardevMux *mux;
3848
3849 if (chardev == NULL) {
3850 error_setg(errp, "chardev: mux: no chardev given");
3851 return;
3852 }
3853 mux = backend->u.mux.data = g_new0(ChardevMux, 1);
3854 qemu_chr_parse_common(opts, qapi_ChardevMux_base(mux));
3855 mux->chardev = g_strdup(chardev);
3856}
3857
3858static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
3859 Error **errp)
3860{
3861 bool is_listen = qemu_opt_get_bool(opts, "server", false);
3862 bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true);
3863 bool is_telnet = qemu_opt_get_bool(opts, "telnet", false);
3864 bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true);
3865 int64_t reconnect = qemu_opt_get_number(opts, "reconnect", 0);
3866 const char *path = qemu_opt_get(opts, "path");
3867 const char *host = qemu_opt_get(opts, "host");
3868 const char *port = qemu_opt_get(opts, "port");
3869 const char *tls_creds = qemu_opt_get(opts, "tls-creds");
3870 SocketAddress *addr;
3871 ChardevSocket *sock;
3872
3873 if (!path) {
3874 if (!host) {
3875 error_setg(errp, "chardev: socket: no host given");
3876 return;
3877 }
3878 if (!port) {
3879 error_setg(errp, "chardev: socket: no port given");
3880 return;
3881 }
3882 } else {
3883 if (tls_creds) {
3884 error_setg(errp, "TLS can only be used over TCP socket");
3885 return;
3886 }
3887 }
3888
3889 sock = backend->u.socket.data = g_new0(ChardevSocket, 1);
3890 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock));
3891
3892 sock->has_nodelay = true;
3893 sock->nodelay = do_nodelay;
3894 sock->has_server = true;
3895 sock->server = is_listen;
3896 sock->has_telnet = true;
3897 sock->telnet = is_telnet;
3898 sock->has_wait = true;
3899 sock->wait = is_waitconnect;
3900 sock->has_reconnect = true;
3901 sock->reconnect = reconnect;
3902 sock->tls_creds = g_strdup(tls_creds);
3903
3904 addr = g_new0(SocketAddress, 1);
3905 if (path) {
3906 UnixSocketAddress *q_unix;
3907 addr->type = SOCKET_ADDRESS_KIND_UNIX;
3908 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1);
3909 q_unix->path = g_strdup(path);
3910 } else {
3911 addr->type = SOCKET_ADDRESS_KIND_INET;
3912 addr->u.inet.data = g_new(InetSocketAddress, 1);
3913 *addr->u.inet.data = (InetSocketAddress) {
3914 .host = g_strdup(host),
3915 .port = g_strdup(port),
3916 .has_to = qemu_opt_get(opts, "to"),
3917 .to = qemu_opt_get_number(opts, "to", 0),
3918 .has_ipv4 = qemu_opt_get(opts, "ipv4"),
3919 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0),
3920 .has_ipv6 = qemu_opt_get(opts, "ipv6"),
3921 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0),
3922 };
3923 }
3924 sock->addr = addr;
3925}
3926
3927static void qemu_chr_parse_udp(QemuOpts *opts, ChardevBackend *backend,
3928 Error **errp)
3929{
3930 const char *host = qemu_opt_get(opts, "host");
3931 const char *port = qemu_opt_get(opts, "port");
3932 const char *localaddr = qemu_opt_get(opts, "localaddr");
3933 const char *localport = qemu_opt_get(opts, "localport");
3934 bool has_local = false;
3935 SocketAddress *addr;
3936 ChardevUdp *udp;
3937
3938 if (host == NULL || strlen(host) == 0) {
3939 host = "localhost";
3940 }
3941 if (port == NULL || strlen(port) == 0) {
3942 error_setg(errp, "chardev: udp: remote port not specified");
3943 return;
3944 }
3945 if (localport == NULL || strlen(localport) == 0) {
3946 localport = "0";
3947 } else {
3948 has_local = true;
3949 }
3950 if (localaddr == NULL || strlen(localaddr) == 0) {
3951 localaddr = "";
3952 } else {
3953 has_local = true;
3954 }
3955
3956 udp = backend->u.udp.data = g_new0(ChardevUdp, 1);
3957 qemu_chr_parse_common(opts, qapi_ChardevUdp_base(udp));
3958
3959 addr = g_new0(SocketAddress, 1);
3960 addr->type = SOCKET_ADDRESS_KIND_INET;
3961 addr->u.inet.data = g_new(InetSocketAddress, 1);
3962 *addr->u.inet.data = (InetSocketAddress) {
3963 .host = g_strdup(host),
3964 .port = g_strdup(port),
3965 .has_ipv4 = qemu_opt_get(opts, "ipv4"),
3966 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0),
3967 .has_ipv6 = qemu_opt_get(opts, "ipv6"),
3968 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0),
3969 };
3970 udp->remote = addr;
3971
3972 if (has_local) {
3973 udp->has_local = true;
3974 addr = g_new0(SocketAddress, 1);
3975 addr->type = SOCKET_ADDRESS_KIND_INET;
3976 addr->u.inet.data = g_new(InetSocketAddress, 1);
3977 *addr->u.inet.data = (InetSocketAddress) {
3978 .host = g_strdup(localaddr),
3979 .port = g_strdup(localport),
3980 };
3981 udp->local = addr;
3982 }
3983}
3984
3985typedef struct CharDriver {
3986 const char *name;
3987 ChardevBackendKind kind;
3988 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3989 CharDriverState *(*create)(const char *id, ChardevBackend *backend,
3990 ChardevReturn *ret, Error **errp);
3991} CharDriver;
3992
3993static GSList *backends;
3994
3995void register_char_driver(const char *name, ChardevBackendKind kind,
3996 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp),
3997 CharDriverState *(*create)(const char *id, ChardevBackend *backend,
3998 ChardevReturn *ret, Error **errp))
3999{
4000 CharDriver *s;
4001
4002 s = g_malloc0(sizeof(*s));
4003 s->name = g_strdup(name);
4004 s->kind = kind;
4005 s->parse = parse;
4006 s->create = create;
4007
4008 backends = g_slist_append(backends, s);
4009}
4010
4011CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
4012 Error **errp)
4013{
4014 Error *local_err = NULL;
4015 CharDriver *cd;
4016 CharDriverState *chr;
4017 GSList *i;
4018 ChardevReturn *ret = NULL;
4019 ChardevBackend *backend;
4020 const char *id = qemu_opts_id(opts);
4021 char *bid = NULL;
4022
4023 if (qemu_opt_get(opts, "backend") == NULL) {
4024 error_setg(errp, "chardev: \"%s\" missing backend",
4025 qemu_opts_id(opts));
4026 goto err;
4027 }
4028
4029 if (is_help_option(qemu_opt_get(opts, "backend"))) {
4030 fprintf(stderr, "Available chardev backend types:\n");
4031 for (i = backends; i; i = i->next) {
4032 cd = i->data;
4033 fprintf(stderr, "%s\n", cd->name);
4034 }
4035 exit(!is_help_option(qemu_opt_get(opts, "backend")));
4036 }
4037
4038 if (id == NULL) {
4039 error_setg(errp, "chardev: no id specified");
4040 goto err;
4041 }
4042
4043 for (i = backends; i; i = i->next) {
4044 cd = i->data;
4045
4046 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
4047 break;
4048 }
4049 }
4050 if (i == NULL) {
4051 error_setg(errp, "chardev: backend \"%s\" not found",
4052 qemu_opt_get(opts, "backend"));
4053 goto err;
4054 }
4055
4056 backend = g_new0(ChardevBackend, 1);
4057
4058 if (qemu_opt_get_bool(opts, "mux", 0)) {
4059 bid = g_strdup_printf("%s-base", id);
4060 }
4061
4062 chr = NULL;
4063 backend->type = cd->kind;
4064 if (cd->parse) {
4065 cd->parse(opts, backend, &local_err);
4066 if (local_err) {
4067 error_propagate(errp, local_err);
4068 goto qapi_out;
4069 }
4070 } else {
4071 ChardevCommon *cc = g_new0(ChardevCommon, 1);
4072 qemu_chr_parse_common(opts, cc);
4073 backend->u.null.data = cc; /* Any ChardevCommon member would work */
4074 }
4075
4076 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
4077 if (!ret) {
4078 goto qapi_out;
4079 }
4080
4081 if (bid) {
4082 qapi_free_ChardevBackend(backend);
4083 qapi_free_ChardevReturn(ret);
4084 backend = g_new0(ChardevBackend, 1);
4085 backend->u.mux.data = g_new0(ChardevMux, 1);
4086 backend->type = CHARDEV_BACKEND_KIND_MUX;
4087 backend->u.mux.data->chardev = g_strdup(bid);
4088 ret = qmp_chardev_add(id, backend, errp);
4089 if (!ret) {
4090 chr = qemu_chr_find(bid);
4091 qemu_chr_delete(chr);
4092 chr = NULL;
4093 goto qapi_out;
4094 }
4095 }
4096
4097 chr = qemu_chr_find(id);
4098
4099qapi_out:
4100 qapi_free_ChardevBackend(backend);
4101 qapi_free_ChardevReturn(ret);
4102 g_free(bid);
4103 return chr;
4104
4105err:
4106 return NULL;
4107}
4108
4109CharDriverState *qemu_chr_new_noreplay(const char *label, const char *filename)
4110{
4111 const char *p;
4112 CharDriverState *chr;
4113 QemuOpts *opts;
4114 Error *err = NULL;
4115
4116 if (strstart(filename, "chardev:", &p)) {
4117 return qemu_chr_find(p);
4118 }
4119
4120 opts = qemu_chr_parse_compat(label, filename);
4121 if (!opts)
4122 return NULL;
4123
4124 chr = qemu_chr_new_from_opts(opts, &err);
4125 if (err) {
4126 error_report_err(err);
4127 }
4128 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
4129 monitor_init(chr, MONITOR_USE_READLINE);
4130 }
4131 qemu_opts_del(opts);
4132 return chr;
4133}
4134
4135CharDriverState *qemu_chr_new(const char *label, const char *filename)
4136{
4137 CharDriverState *chr;
4138 chr = qemu_chr_new_noreplay(label, filename);
4139 if (chr) {
4140 chr->replay = replay_mode != REPLAY_MODE_NONE;
4141 if (chr->replay && chr->chr_ioctl) {
4142 fprintf(stderr,
4143 "Replay: ioctl is not supported for serial devices yet\n");
4144 }
4145 replay_register_char_driver(chr);
4146 }
4147 return chr;
4148}
4149
4150void qemu_chr_fe_set_echo(CharBackend *be, bool echo)
4151{
4152 CharDriverState *chr = be->chr;
4153
4154 if (chr->chr_set_echo) {
4155 chr->chr_set_echo(chr, echo);
4156 }
4157}
4158
4159void qemu_chr_fe_set_open(CharBackend *be, int fe_open)
4160{
4161 CharDriverState *chr = be->chr;
4162
4163 if (chr->fe_open == fe_open) {
4164 return;
4165 }
4166 chr->fe_open = fe_open;
4167 if (chr->chr_set_fe_open) {
4168 chr->chr_set_fe_open(chr, fe_open);
4169 }
4170}
4171
4172void qemu_chr_fe_event(CharBackend *be, int event)
4173{
4174 CharDriverState *chr = be->chr;
4175
4176 if (chr->chr_fe_event) {
4177 chr->chr_fe_event(chr, event);
4178 }
4179}
4180
4181guint qemu_chr_fe_add_watch(CharBackend *be, GIOCondition cond,
4182 GIOFunc func, void *user_data)
4183{
4184 CharDriverState *s = be->chr;
4185 GSource *src;
4186 guint tag;
4187
4188 if (s->chr_add_watch == NULL) {
4189 return 0;
4190 }
4191
4192 src = s->chr_add_watch(s, cond);
4193 if (!src) {
4194 return 0;
4195 }
4196
4197 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
4198 tag = g_source_attach(src, NULL);
4199 g_source_unref(src);
4200
4201 return tag;
4202}
4203
4204void qemu_chr_fe_disconnect(CharBackend *be)
4205{
4206 CharDriverState *chr = be->chr;
4207
4208 if (chr->chr_disconnect) {
4209 chr->chr_disconnect(chr);
4210 }
4211}
4212
4213static void qemu_chr_free_common(CharDriverState *chr)
4214{
4215 g_free(chr->filename);
4216 g_free(chr->label);
4217 if (chr->logfd != -1) {
4218 close(chr->logfd);
4219 }
4220 qemu_mutex_destroy(&chr->chr_write_lock);
4221 g_free(chr);
4222}
4223
4224void qemu_chr_free(CharDriverState *chr)
4225{
4226 if (chr->chr_close) {
4227 chr->chr_close(chr);
4228 }
4229 qemu_chr_free_common(chr);
4230}
4231
4232void qemu_chr_delete(CharDriverState *chr)
4233{
4234 QTAILQ_REMOVE(&chardevs, chr, next);
4235 qemu_chr_free(chr);
4236}
4237
4238ChardevInfoList *qmp_query_chardev(Error **errp)
4239{
4240 ChardevInfoList *chr_list = NULL;
4241 CharDriverState *chr;
4242
4243 QTAILQ_FOREACH(chr, &chardevs, next) {
4244 ChardevInfoList *info = g_malloc0(sizeof(*info));
4245 info->value = g_malloc0(sizeof(*info->value));
4246 info->value->label = g_strdup(chr->label);
4247 info->value->filename = g_strdup(chr->filename);
4248 info->value->frontend_open = chr->fe_open;
4249
4250 info->next = chr_list;
4251 chr_list = info;
4252 }
4253
4254 return chr_list;
4255}
4256
4257ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp)
4258{
4259 ChardevBackendInfoList *backend_list = NULL;
4260 CharDriver *c = NULL;
4261 GSList *i = NULL;
4262
4263 for (i = backends; i; i = i->next) {
4264 ChardevBackendInfoList *info = g_malloc0(sizeof(*info));
4265 c = i->data;
4266 info->value = g_malloc0(sizeof(*info->value));
4267 info->value->name = g_strdup(c->name);
4268
4269 info->next = backend_list;
4270 backend_list = info;
4271 }
4272
4273 return backend_list;
4274}
4275
4276CharDriverState *qemu_chr_find(const char *name)
4277{
4278 CharDriverState *chr;
4279
4280 QTAILQ_FOREACH(chr, &chardevs, next) {
4281 if (strcmp(chr->label, name) != 0)
4282 continue;
4283 return chr;
4284 }
4285 return NULL;
4286}
4287
4288QemuOptsList qemu_chardev_opts = {
4289 .name = "chardev",
4290 .implied_opt_name = "backend",
4291 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
4292 .desc = {
4293 {
4294 .name = "backend",
4295 .type = QEMU_OPT_STRING,
4296 },{
4297 .name = "path",
4298 .type = QEMU_OPT_STRING,
4299 },{
4300 .name = "host",
4301 .type = QEMU_OPT_STRING,
4302 },{
4303 .name = "port",
4304 .type = QEMU_OPT_STRING,
4305 },{
4306 .name = "localaddr",
4307 .type = QEMU_OPT_STRING,
4308 },{
4309 .name = "localport",
4310 .type = QEMU_OPT_STRING,
4311 },{
4312 .name = "to",
4313 .type = QEMU_OPT_NUMBER,
4314 },{
4315 .name = "ipv4",
4316 .type = QEMU_OPT_BOOL,
4317 },{
4318 .name = "ipv6",
4319 .type = QEMU_OPT_BOOL,
4320 },{
4321 .name = "wait",
4322 .type = QEMU_OPT_BOOL,
4323 },{
4324 .name = "server",
4325 .type = QEMU_OPT_BOOL,
4326 },{
4327 .name = "delay",
4328 .type = QEMU_OPT_BOOL,
4329 },{
4330 .name = "reconnect",
4331 .type = QEMU_OPT_NUMBER,
4332 },{
4333 .name = "telnet",
4334 .type = QEMU_OPT_BOOL,
4335 },{
4336 .name = "tls-creds",
4337 .type = QEMU_OPT_STRING,
4338 },{
4339 .name = "width",
4340 .type = QEMU_OPT_NUMBER,
4341 },{
4342 .name = "height",
4343 .type = QEMU_OPT_NUMBER,
4344 },{
4345 .name = "cols",
4346 .type = QEMU_OPT_NUMBER,
4347 },{
4348 .name = "rows",
4349 .type = QEMU_OPT_NUMBER,
4350 },{
4351 .name = "mux",
4352 .type = QEMU_OPT_BOOL,
4353 },{
4354 .name = "signal",
4355 .type = QEMU_OPT_BOOL,
4356 },{
4357 .name = "name",
4358 .type = QEMU_OPT_STRING,
4359 },{
4360 .name = "debug",
4361 .type = QEMU_OPT_NUMBER,
4362 },{
4363 .name = "size",
4364 .type = QEMU_OPT_SIZE,
4365 },{
4366 .name = "chardev",
4367 .type = QEMU_OPT_STRING,
4368 },{
4369 .name = "append",
4370 .type = QEMU_OPT_BOOL,
4371 },{
4372 .name = "logfile",
4373 .type = QEMU_OPT_STRING,
4374 },{
4375 .name = "logappend",
4376 .type = QEMU_OPT_BOOL,
4377 },
4378 { /* end of list */ }
4379 },
4380};
4381
4382#ifdef _WIN32
4383
4384static CharDriverState *qmp_chardev_open_file(const char *id,
4385 ChardevBackend *backend,
4386 ChardevReturn *ret,
4387 Error **errp)
4388{
4389 ChardevFile *file = backend->u.file.data;
4390 ChardevCommon *common = qapi_ChardevFile_base(file);
4391 HANDLE out;
4392 DWORD accessmode;
4393 DWORD flags;
4394
4395 if (file->has_in) {
4396 error_setg(errp, "input file not supported");
4397 return NULL;
4398 }
4399
4400 if (file->has_append && file->append) {
4401 /* Append to file if it already exists. */
4402 accessmode = FILE_GENERIC_WRITE & ~FILE_WRITE_DATA;
4403 flags = OPEN_ALWAYS;
4404 } else {
4405 /* Truncate file if it already exists. */
4406 accessmode = GENERIC_WRITE;
4407 flags = CREATE_ALWAYS;
4408 }
4409
4410 out = CreateFile(file->out, accessmode, FILE_SHARE_READ, NULL, flags,
4411 FILE_ATTRIBUTE_NORMAL, NULL);
4412 if (out == INVALID_HANDLE_VALUE) {
4413 error_setg(errp, "open %s failed", file->out);
4414 return NULL;
4415 }
4416 return qemu_chr_open_win_file(out, common, errp);
4417}
4418
4419static CharDriverState *qmp_chardev_open_serial(const char *id,
4420 ChardevBackend *backend,
4421 ChardevReturn *ret,
4422 Error **errp)
4423{
4424 ChardevHostdev *serial = backend->u.serial.data;
4425 ChardevCommon *common = qapi_ChardevHostdev_base(serial);
4426 return qemu_chr_open_win_path(serial->device, common, errp);
4427}
4428
4429#else /* WIN32 */
4430
4431static int qmp_chardev_open_file_source(char *src, int flags,
4432 Error **errp)
4433{
4434 int fd = -1;
4435
4436 TFR(fd = qemu_open(src, flags, 0666));
4437 if (fd == -1) {
4438 error_setg_file_open(errp, errno, src);
4439 }
4440 return fd;
4441}
4442
4443static CharDriverState *qmp_chardev_open_file(const char *id,
4444 ChardevBackend *backend,
4445 ChardevReturn *ret,
4446 Error **errp)
4447{
4448 ChardevFile *file = backend->u.file.data;
4449 ChardevCommon *common = qapi_ChardevFile_base(file);
4450 int flags, in = -1, out;
4451
4452 flags = O_WRONLY | O_CREAT | O_BINARY;
4453 if (file->has_append && file->append) {
4454 flags |= O_APPEND;
4455 } else {
4456 flags |= O_TRUNC;
4457 }
4458
4459 out = qmp_chardev_open_file_source(file->out, flags, errp);
4460 if (out < 0) {
4461 return NULL;
4462 }
4463
4464 if (file->has_in) {
4465 flags = O_RDONLY;
4466 in = qmp_chardev_open_file_source(file->in, flags, errp);
4467 if (in < 0) {
4468 qemu_close(out);
4469 return NULL;
4470 }
4471 }
4472
4473 return qemu_chr_open_fd(in, out, common, errp);
4474}
4475
4476#ifdef HAVE_CHARDEV_SERIAL
4477static CharDriverState *qmp_chardev_open_serial(const char *id,
4478 ChardevBackend *backend,
4479 ChardevReturn *ret,
4480 Error **errp)
4481{
4482 ChardevHostdev *serial = backend->u.serial.data;
4483 ChardevCommon *common = qapi_ChardevHostdev_base(serial);
4484 int fd;
4485
4486 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
4487 if (fd < 0) {
4488 return NULL;
4489 }
4490 qemu_set_nonblock(fd);
4491 return qemu_chr_open_tty_fd(fd, common, errp);
4492}
4493#endif
4494
4495#ifdef HAVE_CHARDEV_PARPORT
4496static CharDriverState *qmp_chardev_open_parallel(const char *id,
4497 ChardevBackend *backend,
4498 ChardevReturn *ret,
4499 Error **errp)
4500{
4501 ChardevHostdev *parallel = backend->u.parallel.data;
4502 ChardevCommon *common = qapi_ChardevHostdev_base(parallel);
4503 int fd;
4504
4505 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
4506 if (fd < 0) {
4507 return NULL;
4508 }
4509 return qemu_chr_open_pp_fd(fd, common, errp);
4510}
4511#endif
4512
4513#endif /* WIN32 */
4514
4515static gboolean socket_reconnect_timeout(gpointer opaque)
4516{
4517 CharDriverState *chr = opaque;
4518 TCPCharDriver *s = chr->opaque;
4519 QIOChannelSocket *sioc;
4520
4521 s->reconnect_timer = 0;
4522
4523 if (chr->be_open) {
4524 return false;
4525 }
4526
4527 sioc = qio_channel_socket_new();
4528 qio_channel_socket_connect_async(sioc, s->addr,
4529 qemu_chr_socket_connected,
4530 chr, NULL);
4531
4532 return false;
4533}
4534
4535static CharDriverState *qmp_chardev_open_socket(const char *id,
4536 ChardevBackend *backend,
4537 ChardevReturn *ret,
4538 Error **errp)
4539{
4540 CharDriverState *chr;
4541 TCPCharDriver *s;
4542 ChardevSocket *sock = backend->u.socket.data;
4543 SocketAddress *addr = sock->addr;
4544 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
4545 bool is_listen = sock->has_server ? sock->server : true;
4546 bool is_telnet = sock->has_telnet ? sock->telnet : false;
4547 bool is_waitconnect = sock->has_wait ? sock->wait : false;
4548 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0;
4549 ChardevCommon *common = qapi_ChardevSocket_base(sock);
4550 QIOChannelSocket *sioc = NULL;
4551
4552 chr = qemu_chr_alloc(common, errp);
4553 if (!chr) {
4554 return NULL;
4555 }
4556 s = g_new0(TCPCharDriver, 1);
4557
4558 s->is_unix = addr->type == SOCKET_ADDRESS_KIND_UNIX;
4559 s->is_listen = is_listen;
4560 s->is_telnet = is_telnet;
4561 s->do_nodelay = do_nodelay;
4562 if (sock->tls_creds) {
4563 Object *creds;
4564 creds = object_resolve_path_component(
4565 object_get_objects_root(), sock->tls_creds);
4566 if (!creds) {
4567 error_setg(errp, "No TLS credentials with id '%s'",
4568 sock->tls_creds);
4569 goto error;
4570 }
4571 s->tls_creds = (QCryptoTLSCreds *)
4572 object_dynamic_cast(creds,
4573 TYPE_QCRYPTO_TLS_CREDS);
4574 if (!s->tls_creds) {
4575 error_setg(errp, "Object with id '%s' is not TLS credentials",
4576 sock->tls_creds);
4577 goto error;
4578 }
4579 object_ref(OBJECT(s->tls_creds));
4580 if (is_listen) {
4581 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
4582 error_setg(errp, "%s",
4583 "Expected TLS credentials for server endpoint");
4584 goto error;
4585 }
4586 } else {
4587 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) {
4588 error_setg(errp, "%s",
4589 "Expected TLS credentials for client endpoint");
4590 goto error;
4591 }
4592 }
4593 }
4594
4595 s->addr = QAPI_CLONE(SocketAddress, sock->addr);
4596
4597 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE);
4598 if (s->is_unix) {
4599 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS);
4600 }
4601
4602 chr->opaque = s;
4603 chr->chr_wait_connected = tcp_chr_wait_connected;
4604 chr->chr_write = tcp_chr_write;
4605 chr->chr_sync_read = tcp_chr_sync_read;
4606 chr->chr_close = tcp_chr_close;
4607 chr->chr_disconnect = tcp_chr_disconnect;
4608 chr->get_msgfds = tcp_get_msgfds;
4609 chr->set_msgfds = tcp_set_msgfds;
4610 chr->chr_add_client = tcp_chr_add_client;
4611 chr->chr_add_watch = tcp_chr_add_watch;
4612 chr->chr_update_read_handler = tcp_chr_update_read_handler;
4613 /* be isn't opened until we get a connection */
4614 chr->explicit_be_open = true;
4615
4616 chr->filename = SocketAddress_to_str("disconnected:",
4617 addr, is_listen, is_telnet);
4618
4619 if (is_listen) {
4620 if (is_telnet) {
4621 s->do_telnetopt = 1;
4622 }
4623 } else if (reconnect > 0) {
4624 s->reconnect_time = reconnect;
4625 }
4626
4627 if (s->reconnect_time) {
4628 sioc = qio_channel_socket_new();
4629 qio_channel_socket_connect_async(sioc, s->addr,
4630 qemu_chr_socket_connected,
4631 chr, NULL);
4632 } else {
4633 if (s->is_listen) {
4634 sioc = qio_channel_socket_new();
4635 if (qio_channel_socket_listen_sync(sioc, s->addr, errp) < 0) {
4636 goto error;
4637 }
4638 s->listen_ioc = sioc;
4639 if (is_waitconnect &&
4640 qemu_chr_wait_connected(chr, errp) < 0) {
4641 goto error;
4642 }
4643 if (!s->ioc) {
4644 s->listen_tag = qio_channel_add_watch(
4645 QIO_CHANNEL(s->listen_ioc), G_IO_IN,
4646 tcp_chr_accept, chr, NULL);
4647 }
4648 } else if (qemu_chr_wait_connected(chr, errp) < 0) {
4649 goto error;
4650 }
4651 }
4652
4653 return chr;
4654
4655 error:
4656 if (sioc) {
4657 object_unref(OBJECT(sioc));
4658 }
4659 if (s->tls_creds) {
4660 object_unref(OBJECT(s->tls_creds));
4661 }
4662 g_free(s);
4663 qemu_chr_free_common(chr);
4664 return NULL;
4665}
4666
4667static CharDriverState *qmp_chardev_open_udp(const char *id,
4668 ChardevBackend *backend,
4669 ChardevReturn *ret,
4670 Error **errp)
4671{
4672 ChardevUdp *udp = backend->u.udp.data;
4673 ChardevCommon *common = qapi_ChardevUdp_base(udp);
4674 QIOChannelSocket *sioc = qio_channel_socket_new();
4675
4676 if (qio_channel_socket_dgram_sync(sioc,
4677 udp->local, udp->remote,
4678 errp) < 0) {
4679 object_unref(OBJECT(sioc));
4680 return NULL;
4681 }
4682 return qemu_chr_open_udp(sioc, common, errp);
4683}
4684
4685
4686bool qemu_chr_has_feature(CharDriverState *chr,
4687 CharDriverFeature feature)
4688{
4689 return test_bit(feature, chr->features);
4690}
4691
4692void qemu_chr_set_feature(CharDriverState *chr,
4693 CharDriverFeature feature)
4694{
4695 return set_bit(feature, chr->features);
4696}
4697
4698ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
4699 Error **errp)
4700{
4701 ChardevReturn *ret = g_new0(ChardevReturn, 1);
4702 CharDriverState *chr = NULL;
4703 Error *local_err = NULL;
4704 GSList *i;
4705 CharDriver *cd;
4706
4707 chr = qemu_chr_find(id);
4708 if (chr) {
4709 error_setg(errp, "Chardev '%s' already exists", id);
4710 g_free(ret);
4711 return NULL;
4712 }
4713
4714 for (i = backends; i; i = i->next) {
4715 cd = i->data;
4716
4717 if (cd->kind == backend->type) {
4718 chr = cd->create(id, backend, ret, &local_err);
4719 if (local_err) {
4720 error_propagate(errp, local_err);
4721 goto out_error;
4722 }
4723 break;
4724 }
4725 }
4726
4727 if (chr == NULL) {
4728 assert(!i);
4729 error_setg(errp, "chardev backend not available");
4730 goto out_error;
4731 }
4732
4733 chr->label = g_strdup(id);
4734 chr->avail_connections =
4735 (backend->type == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
4736 if (!chr->filename) {
4737 chr->filename = g_strdup(ChardevBackendKind_lookup[backend->type]);
4738 }
4739 if (!chr->explicit_be_open) {
4740 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
4741 }
4742 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
4743 return ret;
4744
4745out_error:
4746 g_free(ret);
4747 return NULL;
4748}
4749
4750void qmp_chardev_remove(const char *id, Error **errp)
4751{
4752 CharDriverState *chr;
4753
4754 chr = qemu_chr_find(id);
4755 if (chr == NULL) {
4756 error_setg(errp, "Chardev '%s' not found", id);
4757 return;
4758 }
4759 if (chr->chr_can_read || chr->chr_read ||
4760 chr->chr_event || chr->handler_opaque) {
4761 error_setg(errp, "Chardev '%s' is busy", id);
4762 return;
4763 }
4764 if (chr->replay) {
4765 error_setg(errp,
4766 "Chardev '%s' cannot be unplugged in record/replay mode", id);
4767 return;
4768 }
4769 qemu_chr_delete(chr);
4770}
4771
4772void qemu_chr_cleanup(void)
4773{
4774 CharDriverState *chr, *tmp;
4775
4776 QTAILQ_FOREACH_SAFE(chr, &chardevs, next, tmp) {
4777 qemu_chr_delete(chr);
4778 }
4779}
4780
4781static void register_types(void)
4782{
4783 register_char_driver("null", CHARDEV_BACKEND_KIND_NULL, NULL,
4784 qemu_chr_open_null);
4785 register_char_driver("socket", CHARDEV_BACKEND_KIND_SOCKET,
4786 qemu_chr_parse_socket, qmp_chardev_open_socket);
4787 register_char_driver("udp", CHARDEV_BACKEND_KIND_UDP, qemu_chr_parse_udp,
4788 qmp_chardev_open_udp);
4789 register_char_driver("ringbuf", CHARDEV_BACKEND_KIND_RINGBUF,
4790 qemu_chr_parse_ringbuf, qemu_chr_open_ringbuf);
4791 register_char_driver("file", CHARDEV_BACKEND_KIND_FILE,
4792 qemu_chr_parse_file_out, qmp_chardev_open_file);
4793 register_char_driver("stdio", CHARDEV_BACKEND_KIND_STDIO,
4794 qemu_chr_parse_stdio, qemu_chr_open_stdio);
4795#if defined HAVE_CHARDEV_SERIAL
4796 register_char_driver("serial", CHARDEV_BACKEND_KIND_SERIAL,
4797 qemu_chr_parse_serial, qmp_chardev_open_serial);
4798 register_char_driver("tty", CHARDEV_BACKEND_KIND_SERIAL,
4799 qemu_chr_parse_serial, qmp_chardev_open_serial);
4800#endif
4801#ifdef HAVE_CHARDEV_PARPORT
4802 register_char_driver("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
4803 qemu_chr_parse_parallel, qmp_chardev_open_parallel);
4804 register_char_driver("parport", CHARDEV_BACKEND_KIND_PARALLEL,
4805 qemu_chr_parse_parallel, qmp_chardev_open_parallel);
4806#endif
4807#ifdef HAVE_CHARDEV_PTY
4808 register_char_driver("pty", CHARDEV_BACKEND_KIND_PTY, NULL,
4809 qemu_chr_open_pty);
4810#endif
4811#ifdef _WIN32
4812 register_char_driver("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL,
4813 qemu_chr_open_win_con);
4814#endif
4815 register_char_driver("pipe", CHARDEV_BACKEND_KIND_PIPE,
4816 qemu_chr_parse_pipe, qemu_chr_open_pipe);
4817 register_char_driver("mux", CHARDEV_BACKEND_KIND_MUX, qemu_chr_parse_mux,
4818 qemu_chr_open_mux);
4819 /* Bug-compatibility: */
4820 register_char_driver("memory", CHARDEV_BACKEND_KIND_MEMORY,
4821 qemu_chr_parse_ringbuf, qemu_chr_open_ringbuf);
4822 /* this must be done after machine init, since we register FEs with muxes
4823 * as part of realize functions like serial_isa_realizefn when -nographic
4824 * is specified
4825 */
4826 qemu_add_machine_init_done_notifier(&muxes_realize_notify);
4827}
4828
4829type_init(register_types);
Empty description
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