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qcow2: Split upgrade/downgrade paths for amend
[qemu.git] / qemu-char.c
blob66703e3f0af1ac705a129422556220723ac5f9cf
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu-common.h"
25 #include "monitor/monitor.h"
26 #include "sysemu/sysemu.h"
27 #include "qemu/error-report.h"
28 #include "qemu/timer.h"
29 #include "sysemu/char.h"
30 #include "hw/usb.h"
31 #include "qmp-commands.h"
32 #include "qapi/qmp-input-visitor.h"
33 #include "qapi/qmp-output-visitor.h"
34 #include "qapi-visit.h"
35
36 #include <unistd.h>
37 #include <fcntl.h>
38 #include <time.h>
39 #include <errno.h>
40 #include <sys/time.h>
41 #include <zlib.h>
42
43 #ifndef _WIN32
44 #include <sys/times.h>
45 #include <sys/wait.h>
46 #include <termios.h>
47 #include <sys/mman.h>
48 #include <sys/ioctl.h>
49 #include <sys/resource.h>
50 #include <sys/socket.h>
51 #include <netinet/in.h>
52 #include <net/if.h>
53 #include <arpa/inet.h>
54 #include <netdb.h>
55 #include <sys/select.h>
56 #ifdef CONFIG_BSD
57 #include <sys/stat.h>
58 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
59 #include <dev/ppbus/ppi.h>
60 #include <dev/ppbus/ppbconf.h>
61 #elif defined(__DragonFly__)
62 #include <dev/misc/ppi/ppi.h>
63 #include <bus/ppbus/ppbconf.h>
64 #endif
65 #else
66 #ifdef __linux__
67 #include <linux/ppdev.h>
68 #include <linux/parport.h>
69 #endif
70 #ifdef __sun__
71 #include <sys/stat.h>
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 CHR_MAX_FILENAME_SIZE 256
91 #define TCP_MAX_FDS 16
92
93 /***********************************************************/
94 /* Socket address helpers */
95
96 static int SocketAddress_to_str(char *dest, int max_len,
97 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 snprintf(dest, max_len, "%s%s:%s:%s%s", prefix,
103 is_telnet ? "telnet" : "tcp", addr->u.inet->host,
104 addr->u.inet->port, is_listen ? ",server" : "");
105 break;
106 case SOCKET_ADDRESS_KIND_UNIX:
107 return snprintf(dest, max_len, "%sunix:%s%s", prefix,
108 addr->u.q_unix->path, is_listen ? ",server" : "");
109 break;
110 case SOCKET_ADDRESS_KIND_FD:
111 return snprintf(dest, max_len, "%sfd:%s%s", prefix, addr->u.fd->str,
112 is_listen ? ",server" : "");
113 break;
114 default:
115 abort();
116 }
117 }
118
119 static int sockaddr_to_str(char *dest, int max_len,
120 struct sockaddr_storage *ss, socklen_t ss_len,
121 struct sockaddr_storage *ps, socklen_t ps_len,
122 bool is_listen, bool is_telnet)
123 {
124 char shost[NI_MAXHOST], sserv[NI_MAXSERV];
125 char phost[NI_MAXHOST], pserv[NI_MAXSERV];
126 const char *left = "", *right = "";
127
128 switch (ss->ss_family) {
129 #ifndef _WIN32
130 case AF_UNIX:
131 return snprintf(dest, max_len, "unix:%s%s",
132 ((struct sockaddr_un *)(ss))->sun_path,
133 is_listen ? ",server" : "");
134 #endif
135 case AF_INET6:
136 left = "[";
137 right = "]";
138 /* fall through */
139 case AF_INET:
140 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost),
141 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV);
142 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost),
143 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV);
144 return snprintf(dest, max_len, "%s:%s%s%s:%s%s <-> %s%s%s:%s",
145 is_telnet ? "telnet" : "tcp",
146 left, shost, right, sserv,
147 is_listen ? ",server" : "",
148 left, phost, right, pserv);
149
150 default:
151 return snprintf(dest, max_len, "unknown");
152 }
153 }
154
155 /***********************************************************/
156 /* character device */
157
158 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
159 QTAILQ_HEAD_INITIALIZER(chardevs);
160
161 CharDriverState *qemu_chr_alloc(void)
162 {
163 CharDriverState *chr = g_malloc0(sizeof(CharDriverState));
164 qemu_mutex_init(&chr->chr_write_lock);
165 return chr;
166 }
167
168 void qemu_chr_be_event(CharDriverState *s, int event)
169 {
170 /* Keep track if the char device is open */
171 switch (event) {
172 case CHR_EVENT_OPENED:
173 s->be_open = 1;
174 break;
175 case CHR_EVENT_CLOSED:
176 s->be_open = 0;
177 break;
178 }
179
180 if (!s->chr_event)
181 return;
182 s->chr_event(s->handler_opaque, event);
183 }
184
185 void qemu_chr_be_generic_open(CharDriverState *s)
186 {
187 qemu_chr_be_event(s, CHR_EVENT_OPENED);
188 }
189
190 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
191 {
192 int ret;
193
194 qemu_mutex_lock(&s->chr_write_lock);
195 ret = s->chr_write(s, buf, len);
196 qemu_mutex_unlock(&s->chr_write_lock);
197 return ret;
198 }
199
200 int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len)
201 {
202 int offset = 0;
203 int res = 0;
204
205 qemu_mutex_lock(&s->chr_write_lock);
206 while (offset < len) {
207 do {
208 res = s->chr_write(s, buf + offset, len - offset);
209 if (res == -1 && errno == EAGAIN) {
210 g_usleep(100);
211 }
212 } while (res == -1 && errno == EAGAIN);
213
214 if (res <= 0) {
215 break;
216 }
217
218 offset += res;
219 }
220 qemu_mutex_unlock(&s->chr_write_lock);
221
222 if (res < 0) {
223 return res;
224 }
225 return offset;
226 }
227
228 int qemu_chr_fe_read_all(CharDriverState *s, uint8_t *buf, int len)
229 {
230 int offset = 0, counter = 10;
231 int res;
232
233 if (!s->chr_sync_read) {
234 return 0;
235 }
236
237 while (offset < len) {
238 do {
239 res = s->chr_sync_read(s, buf + offset, len - offset);
240 if (res == -1 && errno == EAGAIN) {
241 g_usleep(100);
242 }
243 } while (res == -1 && errno == EAGAIN);
244
245 if (res == 0) {
246 break;
247 }
248
249 if (res < 0) {
250 return res;
251 }
252
253 offset += res;
254
255 if (!counter--) {
256 break;
257 }
258 }
259
260 return offset;
261 }
262
263 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
264 {
265 if (!s->chr_ioctl)
266 return -ENOTSUP;
267 return s->chr_ioctl(s, cmd, arg);
268 }
269
270 int qemu_chr_be_can_write(CharDriverState *s)
271 {
272 if (!s->chr_can_read)
273 return 0;
274 return s->chr_can_read(s->handler_opaque);
275 }
276
277 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
278 {
279 if (s->chr_read) {
280 s->chr_read(s->handler_opaque, buf, len);
281 }
282 }
283
284 int qemu_chr_fe_get_msgfd(CharDriverState *s)
285 {
286 int fd;
287 return (qemu_chr_fe_get_msgfds(s, &fd, 1) == 1) ? fd : -1;
288 }
289
290 int qemu_chr_fe_get_msgfds(CharDriverState *s, int *fds, int len)
291 {
292 return s->get_msgfds ? s->get_msgfds(s, fds, len) : -1;
293 }
294
295 int qemu_chr_fe_set_msgfds(CharDriverState *s, int *fds, int num)
296 {
297 return s->set_msgfds ? s->set_msgfds(s, fds, num) : -1;
298 }
299
300 int qemu_chr_add_client(CharDriverState *s, int fd)
301 {
302 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
303 }
304
305 void qemu_chr_accept_input(CharDriverState *s)
306 {
307 if (s->chr_accept_input)
308 s->chr_accept_input(s);
309 qemu_notify_event();
310 }
311
312 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
313 {
314 char buf[READ_BUF_LEN];
315 va_list ap;
316 va_start(ap, fmt);
317 vsnprintf(buf, sizeof(buf), fmt, ap);
318 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
319 va_end(ap);
320 }
321
322 static void remove_fd_in_watch(CharDriverState *chr);
323
324 void qemu_chr_add_handlers(CharDriverState *s,
325 IOCanReadHandler *fd_can_read,
326 IOReadHandler *fd_read,
327 IOEventHandler *fd_event,
328 void *opaque)
329 {
330 int fe_open;
331
332 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
333 fe_open = 0;
334 remove_fd_in_watch(s);
335 } else {
336 fe_open = 1;
337 }
338 s->chr_can_read = fd_can_read;
339 s->chr_read = fd_read;
340 s->chr_event = fd_event;
341 s->handler_opaque = opaque;
342 if (fe_open && s->chr_update_read_handler)
343 s->chr_update_read_handler(s);
344
345 if (!s->explicit_fe_open) {
346 qemu_chr_fe_set_open(s, fe_open);
347 }
348
349 /* We're connecting to an already opened device, so let's make sure we
350 also get the open event */
351 if (fe_open && s->be_open) {
352 qemu_chr_be_generic_open(s);
353 }
354 }
355
356 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
357 {
358 return len;
359 }
360
361 static CharDriverState *qemu_chr_open_null(const char *id,
362 ChardevBackend *backend,
363 ChardevReturn *ret,
364 Error **errp)
365 {
366 CharDriverState *chr;
367
368 chr = qemu_chr_alloc();
369 chr->chr_write = null_chr_write;
370 chr->explicit_be_open = true;
371 return chr;
372 }
373
374 /* MUX driver for serial I/O splitting */
375 #define MAX_MUX 4
376 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
377 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
378 typedef struct {
379 IOCanReadHandler *chr_can_read[MAX_MUX];
380 IOReadHandler *chr_read[MAX_MUX];
381 IOEventHandler *chr_event[MAX_MUX];
382 void *ext_opaque[MAX_MUX];
383 CharDriverState *drv;
384 int focus;
385 int mux_cnt;
386 int term_got_escape;
387 int max_size;
388 /* Intermediate input buffer allows to catch escape sequences even if the
389 currently active device is not accepting any input - but only until it
390 is full as well. */
391 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
392 int prod[MAX_MUX];
393 int cons[MAX_MUX];
394 int timestamps;
395
396 /* Protected by the CharDriverState chr_write_lock. */
397 int linestart;
398 int64_t timestamps_start;
399 } MuxDriver;
400
401
402 /* Called with chr_write_lock held. */
403 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
404 {
405 MuxDriver *d = chr->opaque;
406 int ret;
407 if (!d->timestamps) {
408 ret = qemu_chr_fe_write(d->drv, buf, len);
409 } else {
410 int i;
411
412 ret = 0;
413 for (i = 0; i < len; i++) {
414 if (d->linestart) {
415 char buf1[64];
416 int64_t ti;
417 int secs;
418
419 ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
420 if (d->timestamps_start == -1)
421 d->timestamps_start = ti;
422 ti -= d->timestamps_start;
423 secs = ti / 1000;
424 snprintf(buf1, sizeof(buf1),
425 "[%02d:%02d:%02d.%03d] ",
426 secs / 3600,
427 (secs / 60) % 60,
428 secs % 60,
429 (int)(ti % 1000));
430 qemu_chr_fe_write(d->drv, (uint8_t *)buf1, strlen(buf1));
431 d->linestart = 0;
432 }
433 ret += qemu_chr_fe_write(d->drv, buf+i, 1);
434 if (buf[i] == '\n') {
435 d->linestart = 1;
436 }
437 }
438 }
439 return ret;
440 }
441
442 static const char * const mux_help[] = {
443 "% h print this help\n\r",
444 "% x exit emulator\n\r",
445 "% s save disk data back to file (if -snapshot)\n\r",
446 "% t toggle console timestamps\n\r",
447 "% b send break (magic sysrq)\n\r",
448 "% c switch between console and monitor\n\r",
449 "% % sends %\n\r",
450 NULL
451 };
452
453 int term_escape_char = 0x01; /* ctrl-a is used for escape */
454 static void mux_print_help(CharDriverState *chr)
455 {
456 int i, j;
457 char ebuf[15] = "Escape-Char";
458 char cbuf[50] = "\n\r";
459
460 if (term_escape_char > 0 && term_escape_char < 26) {
461 snprintf(cbuf, sizeof(cbuf), "\n\r");
462 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
463 } else {
464 snprintf(cbuf, sizeof(cbuf),
465 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
466 term_escape_char);
467 }
468 qemu_chr_fe_write(chr, (uint8_t *)cbuf, strlen(cbuf));
469 for (i = 0; mux_help[i] != NULL; i++) {
470 for (j=0; mux_help[i][j] != '\0'; j++) {
471 if (mux_help[i][j] == '%')
472 qemu_chr_fe_write(chr, (uint8_t *)ebuf, strlen(ebuf));
473 else
474 qemu_chr_fe_write(chr, (uint8_t *)&mux_help[i][j], 1);
475 }
476 }
477 }
478
479 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
480 {
481 if (d->chr_event[mux_nr])
482 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
483 }
484
485 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
486 {
487 if (d->term_got_escape) {
488 d->term_got_escape = 0;
489 if (ch == term_escape_char)
490 goto send_char;
491 switch(ch) {
492 case '?':
493 case 'h':
494 mux_print_help(chr);
495 break;
496 case 'x':
497 {
498 const char *term = "QEMU: Terminated\n\r";
499 qemu_chr_fe_write(chr, (uint8_t *)term, strlen(term));
500 exit(0);
501 break;
502 }
503 case 's':
504 bdrv_commit_all();
505 break;
506 case 'b':
507 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
508 break;
509 case 'c':
510 /* Switch to the next registered device */
511 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
512 d->focus++;
513 if (d->focus >= d->mux_cnt)
514 d->focus = 0;
515 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
516 break;
517 case 't':
518 d->timestamps = !d->timestamps;
519 d->timestamps_start = -1;
520 d->linestart = 0;
521 break;
522 }
523 } else if (ch == term_escape_char) {
524 d->term_got_escape = 1;
525 } else {
526 send_char:
527 return 1;
528 }
529 return 0;
530 }
531
532 static void mux_chr_accept_input(CharDriverState *chr)
533 {
534 MuxDriver *d = chr->opaque;
535 int m = d->focus;
536
537 while (d->prod[m] != d->cons[m] &&
538 d->chr_can_read[m] &&
539 d->chr_can_read[m](d->ext_opaque[m])) {
540 d->chr_read[m](d->ext_opaque[m],
541 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
542 }
543 }
544
545 static int mux_chr_can_read(void *opaque)
546 {
547 CharDriverState *chr = opaque;
548 MuxDriver *d = chr->opaque;
549 int m = d->focus;
550
551 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
552 return 1;
553 if (d->chr_can_read[m])
554 return d->chr_can_read[m](d->ext_opaque[m]);
555 return 0;
556 }
557
558 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
559 {
560 CharDriverState *chr = opaque;
561 MuxDriver *d = chr->opaque;
562 int m = d->focus;
563 int i;
564
565 mux_chr_accept_input (opaque);
566
567 for(i = 0; i < size; i++)
568 if (mux_proc_byte(chr, d, buf[i])) {
569 if (d->prod[m] == d->cons[m] &&
570 d->chr_can_read[m] &&
571 d->chr_can_read[m](d->ext_opaque[m]))
572 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
573 else
574 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
575 }
576 }
577
578 static void mux_chr_event(void *opaque, int event)
579 {
580 CharDriverState *chr = opaque;
581 MuxDriver *d = chr->opaque;
582 int i;
583
584 /* Send the event to all registered listeners */
585 for (i = 0; i < d->mux_cnt; i++)
586 mux_chr_send_event(d, i, event);
587 }
588
589 static void mux_chr_update_read_handler(CharDriverState *chr)
590 {
591 MuxDriver *d = chr->opaque;
592
593 if (d->mux_cnt >= MAX_MUX) {
594 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
595 return;
596 }
597 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
598 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
599 d->chr_read[d->mux_cnt] = chr->chr_read;
600 d->chr_event[d->mux_cnt] = chr->chr_event;
601 /* Fix up the real driver with mux routines */
602 if (d->mux_cnt == 0) {
603 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
604 mux_chr_event, chr);
605 }
606 if (d->focus != -1) {
607 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
608 }
609 d->focus = d->mux_cnt;
610 d->mux_cnt++;
611 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
612 }
613
614 static bool muxes_realized;
615
616 /**
617 * Called after processing of default and command-line-specified
618 * chardevs to deliver CHR_EVENT_OPENED events to any FEs attached
619 * to a mux chardev. This is done here to ensure that
620 * output/prompts/banners are only displayed for the FE that has
621 * focus when initial command-line processing/machine init is
622 * completed.
623 *
624 * After this point, any new FE attached to any new or existing
625 * mux will receive CHR_EVENT_OPENED notifications for the BE
626 * immediately.
627 */
628 static void muxes_realize_done(Notifier *notifier, void *unused)
629 {
630 CharDriverState *chr;
631
632 QTAILQ_FOREACH(chr, &chardevs, next) {
633 if (chr->is_mux) {
634 MuxDriver *d = chr->opaque;
635 int i;
636
637 /* send OPENED to all already-attached FEs */
638 for (i = 0; i < d->mux_cnt; i++) {
639 mux_chr_send_event(d, i, CHR_EVENT_OPENED);
640 }
641 /* mark mux as OPENED so any new FEs will immediately receive
642 * OPENED event
643 */
644 qemu_chr_be_generic_open(chr);
645 }
646 }
647 muxes_realized = true;
648 }
649
650 static Notifier muxes_realize_notify = {
651 .notify = muxes_realize_done,
652 };
653
654 static GSource *mux_chr_add_watch(CharDriverState *s, GIOCondition cond)
655 {
656 MuxDriver *d = s->opaque;
657 return d->drv->chr_add_watch(d->drv, cond);
658 }
659
660 static CharDriverState *qemu_chr_open_mux(const char *id,
661 ChardevBackend *backend,
662 ChardevReturn *ret, Error **errp)
663 {
664 ChardevMux *mux = backend->u.mux;
665 CharDriverState *chr, *drv;
666 MuxDriver *d;
667
668 drv = qemu_chr_find(mux->chardev);
669 if (drv == NULL) {
670 error_setg(errp, "mux: base chardev %s not found", mux->chardev);
671 return NULL;
672 }
673
674 chr = qemu_chr_alloc();
675 d = g_new0(MuxDriver, 1);
676
677 chr->opaque = d;
678 d->drv = drv;
679 d->focus = -1;
680 chr->chr_write = mux_chr_write;
681 chr->chr_update_read_handler = mux_chr_update_read_handler;
682 chr->chr_accept_input = mux_chr_accept_input;
683 /* Frontend guest-open / -close notification is not support with muxes */
684 chr->chr_set_fe_open = NULL;
685 if (drv->chr_add_watch) {
686 chr->chr_add_watch = mux_chr_add_watch;
687 }
688 /* only default to opened state if we've realized the initial
689 * set of muxes
690 */
691 chr->explicit_be_open = muxes_realized ? 0 : 1;
692 chr->is_mux = 1;
693
694 return chr;
695 }
696
697
698 #ifdef _WIN32
699 int send_all(int fd, const void *buf, int len1)
700 {
701 int ret, len;
702
703 len = len1;
704 while (len > 0) {
705 ret = send(fd, buf, len, 0);
706 if (ret < 0) {
707 errno = WSAGetLastError();
708 if (errno != WSAEWOULDBLOCK) {
709 return -1;
710 }
711 } else if (ret == 0) {
712 break;
713 } else {
714 buf += ret;
715 len -= ret;
716 }
717 }
718 return len1 - len;
719 }
720
721 #else
722
723 int send_all(int fd, const void *_buf, int len1)
724 {
725 int ret, len;
726 const uint8_t *buf = _buf;
727
728 len = len1;
729 while (len > 0) {
730 ret = write(fd, buf, len);
731 if (ret < 0) {
732 if (errno != EINTR && errno != EAGAIN)
733 return -1;
734 } else if (ret == 0) {
735 break;
736 } else {
737 buf += ret;
738 len -= ret;
739 }
740 }
741 return len1 - len;
742 }
743
744 int recv_all(int fd, void *_buf, int len1, bool single_read)
745 {
746 int ret, len;
747 uint8_t *buf = _buf;
748
749 len = len1;
750 while ((len > 0) && (ret = read(fd, buf, len)) != 0) {
751 if (ret < 0) {
752 if (errno != EINTR && errno != EAGAIN) {
753 return -1;
754 }
755 continue;
756 } else {
757 if (single_read) {
758 return ret;
759 }
760 buf += ret;
761 len -= ret;
762 }
763 }
764 return len1 - len;
765 }
766
767 #endif /* !_WIN32 */
768
769 typedef struct IOWatchPoll
770 {
771 GSource parent;
772
773 GIOChannel *channel;
774 GSource *src;
775
776 IOCanReadHandler *fd_can_read;
777 GSourceFunc fd_read;
778 void *opaque;
779 } IOWatchPoll;
780
781 static IOWatchPoll *io_watch_poll_from_source(GSource *source)
782 {
783 return container_of(source, IOWatchPoll, parent);
784 }
785
786 static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_)
787 {
788 IOWatchPoll *iwp = io_watch_poll_from_source(source);
789 bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
790 bool was_active = iwp->src != NULL;
791 if (was_active == now_active) {
792 return FALSE;
793 }
794
795 if (now_active) {
796 iwp->src = g_io_create_watch(iwp->channel,
797 G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL);
798 g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
799 g_source_attach(iwp->src, NULL);
800 } else {
801 g_source_destroy(iwp->src);
802 g_source_unref(iwp->src);
803 iwp->src = NULL;
804 }
805 return FALSE;
806 }
807
808 static gboolean io_watch_poll_check(GSource *source)
809 {
810 return FALSE;
811 }
812
813 static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
814 gpointer user_data)
815 {
816 abort();
817 }
818
819 static void io_watch_poll_finalize(GSource *source)
820 {
821 /* Due to a glib bug, removing the last reference to a source
822 * inside a finalize callback causes recursive locking (and a
823 * deadlock). This is not a problem inside other callbacks,
824 * including dispatch callbacks, so we call io_remove_watch_poll
825 * to remove this source. At this point, iwp->src must
826 * be NULL, or we would leak it.
827 *
828 * This would be solved much more elegantly by child sources,
829 * but we support older glib versions that do not have them.
830 */
831 IOWatchPoll *iwp = io_watch_poll_from_source(source);
832 assert(iwp->src == NULL);
833 }
834
835 static GSourceFuncs io_watch_poll_funcs = {
836 .prepare = io_watch_poll_prepare,
837 .check = io_watch_poll_check,
838 .dispatch = io_watch_poll_dispatch,
839 .finalize = io_watch_poll_finalize,
840 };
841
842 /* Can only be used for read */
843 static guint io_add_watch_poll(GIOChannel *channel,
844 IOCanReadHandler *fd_can_read,
845 GIOFunc fd_read,
846 gpointer user_data)
847 {
848 IOWatchPoll *iwp;
849 int tag;
850
851 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll));
852 iwp->fd_can_read = fd_can_read;
853 iwp->opaque = user_data;
854 iwp->channel = channel;
855 iwp->fd_read = (GSourceFunc) fd_read;
856 iwp->src = NULL;
857
858 tag = g_source_attach(&iwp->parent, NULL);
859 g_source_unref(&iwp->parent);
860 return tag;
861 }
862
863 static void io_remove_watch_poll(guint tag)
864 {
865 GSource *source;
866 IOWatchPoll *iwp;
867
868 g_return_if_fail (tag > 0);
869
870 source = g_main_context_find_source_by_id(NULL, tag);
871 g_return_if_fail (source != NULL);
872
873 iwp = io_watch_poll_from_source(source);
874 if (iwp->src) {
875 g_source_destroy(iwp->src);
876 g_source_unref(iwp->src);
877 iwp->src = NULL;
878 }
879 g_source_destroy(&iwp->parent);
880 }
881
882 static void remove_fd_in_watch(CharDriverState *chr)
883 {
884 if (chr->fd_in_tag) {
885 io_remove_watch_poll(chr->fd_in_tag);
886 chr->fd_in_tag = 0;
887 }
888 }
889
890 #ifndef _WIN32
891 static GIOChannel *io_channel_from_fd(int fd)
892 {
893 GIOChannel *chan;
894
895 if (fd == -1) {
896 return NULL;
897 }
898
899 chan = g_io_channel_unix_new(fd);
900
901 g_io_channel_set_encoding(chan, NULL, NULL);
902 g_io_channel_set_buffered(chan, FALSE);
903
904 return chan;
905 }
906 #endif
907
908 static GIOChannel *io_channel_from_socket(int fd)
909 {
910 GIOChannel *chan;
911
912 if (fd == -1) {
913 return NULL;
914 }
915
916 #ifdef _WIN32
917 chan = g_io_channel_win32_new_socket(fd);
918 #else
919 chan = g_io_channel_unix_new(fd);
920 #endif
921
922 g_io_channel_set_encoding(chan, NULL, NULL);
923 g_io_channel_set_buffered(chan, FALSE);
924
925 return chan;
926 }
927
928 static int io_channel_send(GIOChannel *fd, const void *buf, size_t len)
929 {
930 size_t offset = 0;
931 GIOStatus status = G_IO_STATUS_NORMAL;
932
933 while (offset < len && status == G_IO_STATUS_NORMAL) {
934 gsize bytes_written = 0;
935
936 status = g_io_channel_write_chars(fd, buf + offset, len - offset,
937 &bytes_written, NULL);
938 offset += bytes_written;
939 }
940
941 if (offset > 0) {
942 return offset;
943 }
944 switch (status) {
945 case G_IO_STATUS_NORMAL:
946 g_assert(len == 0);
947 return 0;
948 case G_IO_STATUS_AGAIN:
949 errno = EAGAIN;
950 return -1;
951 default:
952 break;
953 }
954 errno = EINVAL;
955 return -1;
956 }
957
958 #ifndef _WIN32
959
960 typedef struct FDCharDriver {
961 CharDriverState *chr;
962 GIOChannel *fd_in, *fd_out;
963 int max_size;
964 } FDCharDriver;
965
966 /* Called with chr_write_lock held. */
967 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
968 {
969 FDCharDriver *s = chr->opaque;
970
971 return io_channel_send(s->fd_out, buf, len);
972 }
973
974 static gboolean fd_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
975 {
976 CharDriverState *chr = opaque;
977 FDCharDriver *s = chr->opaque;
978 int len;
979 uint8_t buf[READ_BUF_LEN];
980 GIOStatus status;
981 gsize bytes_read;
982
983 len = sizeof(buf);
984 if (len > s->max_size) {
985 len = s->max_size;
986 }
987 if (len == 0) {
988 return TRUE;
989 }
990
991 status = g_io_channel_read_chars(chan, (gchar *)buf,
992 len, &bytes_read, NULL);
993 if (status == G_IO_STATUS_EOF) {
994 remove_fd_in_watch(chr);
995 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
996 return FALSE;
997 }
998 if (status == G_IO_STATUS_NORMAL) {
999 qemu_chr_be_write(chr, buf, bytes_read);
1000 }
1001
1002 return TRUE;
1003 }
1004
1005 static int fd_chr_read_poll(void *opaque)
1006 {
1007 CharDriverState *chr = opaque;
1008 FDCharDriver *s = chr->opaque;
1009
1010 s->max_size = qemu_chr_be_can_write(chr);
1011 return s->max_size;
1012 }
1013
1014 static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1015 {
1016 FDCharDriver *s = chr->opaque;
1017 return g_io_create_watch(s->fd_out, cond);
1018 }
1019
1020 static void fd_chr_update_read_handler(CharDriverState *chr)
1021 {
1022 FDCharDriver *s = chr->opaque;
1023
1024 remove_fd_in_watch(chr);
1025 if (s->fd_in) {
1026 chr->fd_in_tag = io_add_watch_poll(s->fd_in, fd_chr_read_poll,
1027 fd_chr_read, chr);
1028 }
1029 }
1030
1031 static void fd_chr_close(struct CharDriverState *chr)
1032 {
1033 FDCharDriver *s = chr->opaque;
1034
1035 remove_fd_in_watch(chr);
1036 if (s->fd_in) {
1037 g_io_channel_unref(s->fd_in);
1038 }
1039 if (s->fd_out) {
1040 g_io_channel_unref(s->fd_out);
1041 }
1042
1043 g_free(s);
1044 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1045 }
1046
1047 /* open a character device to a unix fd */
1048 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
1049 {
1050 CharDriverState *chr;
1051 FDCharDriver *s;
1052
1053 chr = qemu_chr_alloc();
1054 s = g_new0(FDCharDriver, 1);
1055 s->fd_in = io_channel_from_fd(fd_in);
1056 s->fd_out = io_channel_from_fd(fd_out);
1057 qemu_set_nonblock(fd_out);
1058 s->chr = chr;
1059 chr->opaque = s;
1060 chr->chr_add_watch = fd_chr_add_watch;
1061 chr->chr_write = fd_chr_write;
1062 chr->chr_update_read_handler = fd_chr_update_read_handler;
1063 chr->chr_close = fd_chr_close;
1064
1065 return chr;
1066 }
1067
1068 static CharDriverState *qemu_chr_open_pipe(const char *id,
1069 ChardevBackend *backend,
1070 ChardevReturn *ret,
1071 Error **errp)
1072 {
1073 ChardevHostdev *opts = backend->u.pipe;
1074 int fd_in, fd_out;
1075 char filename_in[CHR_MAX_FILENAME_SIZE];
1076 char filename_out[CHR_MAX_FILENAME_SIZE];
1077 const char *filename = opts->device;
1078
1079 snprintf(filename_in, CHR_MAX_FILENAME_SIZE, "%s.in", filename);
1080 snprintf(filename_out, CHR_MAX_FILENAME_SIZE, "%s.out", filename);
1081 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
1082 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
1083 if (fd_in < 0 || fd_out < 0) {
1084 if (fd_in >= 0)
1085 close(fd_in);
1086 if (fd_out >= 0)
1087 close(fd_out);
1088 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
1089 if (fd_in < 0) {
1090 error_setg_file_open(errp, errno, filename);
1091 return NULL;
1092 }
1093 }
1094 return qemu_chr_open_fd(fd_in, fd_out);
1095 }
1096
1097 /* init terminal so that we can grab keys */
1098 static struct termios oldtty;
1099 static int old_fd0_flags;
1100 static bool stdio_in_use;
1101 static bool stdio_allow_signal;
1102 static bool stdio_echo_state;
1103
1104 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo);
1105
1106 static void term_exit(void)
1107 {
1108 tcsetattr (0, TCSANOW, &oldtty);
1109 fcntl(0, F_SETFL, old_fd0_flags);
1110 }
1111
1112 static void term_stdio_handler(int sig)
1113 {
1114 /* restore echo after resume from suspend. */
1115 qemu_chr_set_echo_stdio(NULL, stdio_echo_state);
1116 }
1117
1118 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
1119 {
1120 struct termios tty;
1121
1122 stdio_echo_state = echo;
1123 tty = oldtty;
1124 if (!echo) {
1125 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1126 |INLCR|IGNCR|ICRNL|IXON);
1127 tty.c_oflag |= OPOST;
1128 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1129 tty.c_cflag &= ~(CSIZE|PARENB);
1130 tty.c_cflag |= CS8;
1131 tty.c_cc[VMIN] = 1;
1132 tty.c_cc[VTIME] = 0;
1133 }
1134 if (!stdio_allow_signal)
1135 tty.c_lflag &= ~ISIG;
1136
1137 tcsetattr (0, TCSANOW, &tty);
1138 }
1139
1140 static void qemu_chr_close_stdio(struct CharDriverState *chr)
1141 {
1142 term_exit();
1143 fd_chr_close(chr);
1144 }
1145
1146 static CharDriverState *qemu_chr_open_stdio(const char *id,
1147 ChardevBackend *backend,
1148 ChardevReturn *ret,
1149 Error **errp)
1150 {
1151 ChardevStdio *opts = backend->u.stdio;
1152 CharDriverState *chr;
1153 struct sigaction act;
1154
1155 if (is_daemonized()) {
1156 error_setg(errp, "cannot use stdio with -daemonize");
1157 return NULL;
1158 }
1159
1160 if (stdio_in_use) {
1161 error_setg(errp, "cannot use stdio by multiple character devices");
1162 return NULL;
1163 }
1164
1165 stdio_in_use = true;
1166 old_fd0_flags = fcntl(0, F_GETFL);
1167 tcgetattr(0, &oldtty);
1168 qemu_set_nonblock(0);
1169 atexit(term_exit);
1170
1171 memset(&act, 0, sizeof(act));
1172 act.sa_handler = term_stdio_handler;
1173 sigaction(SIGCONT, &act, NULL);
1174
1175 chr = qemu_chr_open_fd(0, 1);
1176 chr->chr_close = qemu_chr_close_stdio;
1177 chr->chr_set_echo = qemu_chr_set_echo_stdio;
1178 if (opts->has_signal) {
1179 stdio_allow_signal = opts->signal;
1180 }
1181 qemu_chr_fe_set_echo(chr, false);
1182
1183 return chr;
1184 }
1185
1186 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1187 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
1188 || defined(__GLIBC__)
1189
1190 #define HAVE_CHARDEV_SERIAL 1
1191 #define HAVE_CHARDEV_PTY 1
1192
1193 typedef struct {
1194 GIOChannel *fd;
1195 int read_bytes;
1196
1197 /* Protected by the CharDriverState chr_write_lock. */
1198 int connected;
1199 guint timer_tag;
1200 guint open_tag;
1201 } PtyCharDriver;
1202
1203 static void pty_chr_update_read_handler_locked(CharDriverState *chr);
1204 static void pty_chr_state(CharDriverState *chr, int connected);
1205
1206 static gboolean pty_chr_timer(gpointer opaque)
1207 {
1208 struct CharDriverState *chr = opaque;
1209 PtyCharDriver *s = chr->opaque;
1210
1211 qemu_mutex_lock(&chr->chr_write_lock);
1212 s->timer_tag = 0;
1213 s->open_tag = 0;
1214 if (!s->connected) {
1215 /* Next poll ... */
1216 pty_chr_update_read_handler_locked(chr);
1217 }
1218 qemu_mutex_unlock(&chr->chr_write_lock);
1219 return FALSE;
1220 }
1221
1222 /* Called with chr_write_lock held. */
1223 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1224 {
1225 PtyCharDriver *s = chr->opaque;
1226
1227 if (s->timer_tag) {
1228 g_source_remove(s->timer_tag);
1229 s->timer_tag = 0;
1230 }
1231
1232 if (ms == 1000) {
1233 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1234 } else {
1235 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1236 }
1237 }
1238
1239 /* Called with chr_write_lock held. */
1240 static void pty_chr_update_read_handler_locked(CharDriverState *chr)
1241 {
1242 PtyCharDriver *s = chr->opaque;
1243 GPollFD pfd;
1244 int rc;
1245
1246 pfd.fd = g_io_channel_unix_get_fd(s->fd);
1247 pfd.events = G_IO_OUT;
1248 pfd.revents = 0;
1249 do {
1250 rc = g_poll(&pfd, 1, 0);
1251 } while (rc == -1 && errno == EINTR);
1252 assert(rc >= 0);
1253
1254 if (pfd.revents & G_IO_HUP) {
1255 pty_chr_state(chr, 0);
1256 } else {
1257 pty_chr_state(chr, 1);
1258 }
1259 }
1260
1261 static void pty_chr_update_read_handler(CharDriverState *chr)
1262 {
1263 qemu_mutex_lock(&chr->chr_write_lock);
1264 pty_chr_update_read_handler_locked(chr);
1265 qemu_mutex_unlock(&chr->chr_write_lock);
1266 }
1267
1268 /* Called with chr_write_lock held. */
1269 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1270 {
1271 PtyCharDriver *s = chr->opaque;
1272
1273 if (!s->connected) {
1274 /* guest sends data, check for (re-)connect */
1275 pty_chr_update_read_handler_locked(chr);
1276 if (!s->connected) {
1277 return 0;
1278 }
1279 }
1280 return io_channel_send(s->fd, buf, len);
1281 }
1282
1283 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1284 {
1285 PtyCharDriver *s = chr->opaque;
1286 if (!s->connected) {
1287 return NULL;
1288 }
1289 return g_io_create_watch(s->fd, cond);
1290 }
1291
1292 static int pty_chr_read_poll(void *opaque)
1293 {
1294 CharDriverState *chr = opaque;
1295 PtyCharDriver *s = chr->opaque;
1296
1297 s->read_bytes = qemu_chr_be_can_write(chr);
1298 return s->read_bytes;
1299 }
1300
1301 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1302 {
1303 CharDriverState *chr = opaque;
1304 PtyCharDriver *s = chr->opaque;
1305 gsize size, len;
1306 uint8_t buf[READ_BUF_LEN];
1307 GIOStatus status;
1308
1309 len = sizeof(buf);
1310 if (len > s->read_bytes)
1311 len = s->read_bytes;
1312 if (len == 0) {
1313 return TRUE;
1314 }
1315 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1316 if (status != G_IO_STATUS_NORMAL) {
1317 pty_chr_state(chr, 0);
1318 return FALSE;
1319 } else {
1320 pty_chr_state(chr, 1);
1321 qemu_chr_be_write(chr, buf, size);
1322 }
1323 return TRUE;
1324 }
1325
1326 static gboolean qemu_chr_be_generic_open_func(gpointer opaque)
1327 {
1328 CharDriverState *chr = opaque;
1329 PtyCharDriver *s = chr->opaque;
1330
1331 s->open_tag = 0;
1332 qemu_chr_be_generic_open(chr);
1333 return FALSE;
1334 }
1335
1336 /* Called with chr_write_lock held. */
1337 static void pty_chr_state(CharDriverState *chr, int connected)
1338 {
1339 PtyCharDriver *s = chr->opaque;
1340
1341 if (!connected) {
1342 if (s->open_tag) {
1343 g_source_remove(s->open_tag);
1344 s->open_tag = 0;
1345 }
1346 remove_fd_in_watch(chr);
1347 s->connected = 0;
1348 /* (re-)connect poll interval for idle guests: once per second.
1349 * We check more frequently in case the guests sends data to
1350 * the virtual device linked to our pty. */
1351 pty_chr_rearm_timer(chr, 1000);
1352 } else {
1353 if (s->timer_tag) {
1354 g_source_remove(s->timer_tag);
1355 s->timer_tag = 0;
1356 }
1357 if (!s->connected) {
1358 g_assert(s->open_tag == 0);
1359 s->connected = 1;
1360 s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, chr);
1361 }
1362 if (!chr->fd_in_tag) {
1363 chr->fd_in_tag = io_add_watch_poll(s->fd, pty_chr_read_poll,
1364 pty_chr_read, chr);
1365 }
1366 }
1367 }
1368
1369 static void pty_chr_close(struct CharDriverState *chr)
1370 {
1371 PtyCharDriver *s = chr->opaque;
1372 int fd;
1373
1374 qemu_mutex_lock(&chr->chr_write_lock);
1375 pty_chr_state(chr, 0);
1376 fd = g_io_channel_unix_get_fd(s->fd);
1377 g_io_channel_unref(s->fd);
1378 close(fd);
1379 if (s->timer_tag) {
1380 g_source_remove(s->timer_tag);
1381 s->timer_tag = 0;
1382 }
1383 qemu_mutex_unlock(&chr->chr_write_lock);
1384 g_free(s);
1385 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1386 }
1387
1388 static CharDriverState *qemu_chr_open_pty(const char *id,
1389 ChardevBackend *backend,
1390 ChardevReturn *ret,
1391 Error **errp)
1392 {
1393 CharDriverState *chr;
1394 PtyCharDriver *s;
1395 int master_fd, slave_fd;
1396 char pty_name[PATH_MAX];
1397
1398 master_fd = qemu_openpty_raw(&slave_fd, pty_name);
1399 if (master_fd < 0) {
1400 error_setg_errno(errp, errno, "Failed to create PTY");
1401 return NULL;
1402 }
1403
1404 close(slave_fd);
1405 qemu_set_nonblock(master_fd);
1406
1407 chr = qemu_chr_alloc();
1408
1409 chr->filename = g_strdup_printf("pty:%s", pty_name);
1410 ret->pty = g_strdup(pty_name);
1411 ret->has_pty = true;
1412
1413 fprintf(stderr, "char device redirected to %s (label %s)\n",
1414 pty_name, id);
1415
1416 s = g_new0(PtyCharDriver, 1);
1417 chr->opaque = s;
1418 chr->chr_write = pty_chr_write;
1419 chr->chr_update_read_handler = pty_chr_update_read_handler;
1420 chr->chr_close = pty_chr_close;
1421 chr->chr_add_watch = pty_chr_add_watch;
1422 chr->explicit_be_open = true;
1423
1424 s->fd = io_channel_from_fd(master_fd);
1425 s->timer_tag = 0;
1426
1427 return chr;
1428 }
1429
1430 static void tty_serial_init(int fd, int speed,
1431 int parity, int data_bits, int stop_bits)
1432 {
1433 struct termios tty;
1434 speed_t spd;
1435
1436 #if 0
1437 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1438 speed, parity, data_bits, stop_bits);
1439 #endif
1440 tcgetattr (fd, &tty);
1441
1442 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1443 speed = speed * 10 / 11;
1444 do {
1445 check_speed(50);
1446 check_speed(75);
1447 check_speed(110);
1448 check_speed(134);
1449 check_speed(150);
1450 check_speed(200);
1451 check_speed(300);
1452 check_speed(600);
1453 check_speed(1200);
1454 check_speed(1800);
1455 check_speed(2400);
1456 check_speed(4800);
1457 check_speed(9600);
1458 check_speed(19200);
1459 check_speed(38400);
1460 /* Non-Posix values follow. They may be unsupported on some systems. */
1461 check_speed(57600);
1462 check_speed(115200);
1463 #ifdef B230400
1464 check_speed(230400);
1465 #endif
1466 #ifdef B460800
1467 check_speed(460800);
1468 #endif
1469 #ifdef B500000
1470 check_speed(500000);
1471 #endif
1472 #ifdef B576000
1473 check_speed(576000);
1474 #endif
1475 #ifdef B921600
1476 check_speed(921600);
1477 #endif
1478 #ifdef B1000000
1479 check_speed(1000000);
1480 #endif
1481 #ifdef B1152000
1482 check_speed(1152000);
1483 #endif
1484 #ifdef B1500000
1485 check_speed(1500000);
1486 #endif
1487 #ifdef B2000000
1488 check_speed(2000000);
1489 #endif
1490 #ifdef B2500000
1491 check_speed(2500000);
1492 #endif
1493 #ifdef B3000000
1494 check_speed(3000000);
1495 #endif
1496 #ifdef B3500000
1497 check_speed(3500000);
1498 #endif
1499 #ifdef B4000000
1500 check_speed(4000000);
1501 #endif
1502 spd = B115200;
1503 } while (0);
1504
1505 cfsetispeed(&tty, spd);
1506 cfsetospeed(&tty, spd);
1507
1508 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1509 |INLCR|IGNCR|ICRNL|IXON);
1510 tty.c_oflag |= OPOST;
1511 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1512 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1513 switch(data_bits) {
1514 default:
1515 case 8:
1516 tty.c_cflag |= CS8;
1517 break;
1518 case 7:
1519 tty.c_cflag |= CS7;
1520 break;
1521 case 6:
1522 tty.c_cflag |= CS6;
1523 break;
1524 case 5:
1525 tty.c_cflag |= CS5;
1526 break;
1527 }
1528 switch(parity) {
1529 default:
1530 case 'N':
1531 break;
1532 case 'E':
1533 tty.c_cflag |= PARENB;
1534 break;
1535 case 'O':
1536 tty.c_cflag |= PARENB | PARODD;
1537 break;
1538 }
1539 if (stop_bits == 2)
1540 tty.c_cflag |= CSTOPB;
1541
1542 tcsetattr (fd, TCSANOW, &tty);
1543 }
1544
1545 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1546 {
1547 FDCharDriver *s = chr->opaque;
1548
1549 switch(cmd) {
1550 case CHR_IOCTL_SERIAL_SET_PARAMS:
1551 {
1552 QEMUSerialSetParams *ssp = arg;
1553 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1554 ssp->speed, ssp->parity,
1555 ssp->data_bits, ssp->stop_bits);
1556 }
1557 break;
1558 case CHR_IOCTL_SERIAL_SET_BREAK:
1559 {
1560 int enable = *(int *)arg;
1561 if (enable) {
1562 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1563 }
1564 }
1565 break;
1566 case CHR_IOCTL_SERIAL_GET_TIOCM:
1567 {
1568 int sarg = 0;
1569 int *targ = (int *)arg;
1570 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1571 *targ = 0;
1572 if (sarg & TIOCM_CTS)
1573 *targ |= CHR_TIOCM_CTS;
1574 if (sarg & TIOCM_CAR)
1575 *targ |= CHR_TIOCM_CAR;
1576 if (sarg & TIOCM_DSR)
1577 *targ |= CHR_TIOCM_DSR;
1578 if (sarg & TIOCM_RI)
1579 *targ |= CHR_TIOCM_RI;
1580 if (sarg & TIOCM_DTR)
1581 *targ |= CHR_TIOCM_DTR;
1582 if (sarg & TIOCM_RTS)
1583 *targ |= CHR_TIOCM_RTS;
1584 }
1585 break;
1586 case CHR_IOCTL_SERIAL_SET_TIOCM:
1587 {
1588 int sarg = *(int *)arg;
1589 int targ = 0;
1590 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1591 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1592 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1593 if (sarg & CHR_TIOCM_CTS)
1594 targ |= TIOCM_CTS;
1595 if (sarg & CHR_TIOCM_CAR)
1596 targ |= TIOCM_CAR;
1597 if (sarg & CHR_TIOCM_DSR)
1598 targ |= TIOCM_DSR;
1599 if (sarg & CHR_TIOCM_RI)
1600 targ |= TIOCM_RI;
1601 if (sarg & CHR_TIOCM_DTR)
1602 targ |= TIOCM_DTR;
1603 if (sarg & CHR_TIOCM_RTS)
1604 targ |= TIOCM_RTS;
1605 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1606 }
1607 break;
1608 default:
1609 return -ENOTSUP;
1610 }
1611 return 0;
1612 }
1613
1614 static void qemu_chr_close_tty(CharDriverState *chr)
1615 {
1616 FDCharDriver *s = chr->opaque;
1617 int fd = -1;
1618
1619 if (s) {
1620 fd = g_io_channel_unix_get_fd(s->fd_in);
1621 }
1622
1623 fd_chr_close(chr);
1624
1625 if (fd >= 0) {
1626 close(fd);
1627 }
1628 }
1629
1630 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1631 {
1632 CharDriverState *chr;
1633
1634 tty_serial_init(fd, 115200, 'N', 8, 1);
1635 chr = qemu_chr_open_fd(fd, fd);
1636 chr->chr_ioctl = tty_serial_ioctl;
1637 chr->chr_close = qemu_chr_close_tty;
1638 return chr;
1639 }
1640 #endif /* __linux__ || __sun__ */
1641
1642 #if defined(__linux__)
1643
1644 #define HAVE_CHARDEV_PARPORT 1
1645
1646 typedef struct {
1647 int fd;
1648 int mode;
1649 } ParallelCharDriver;
1650
1651 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1652 {
1653 if (s->mode != mode) {
1654 int m = mode;
1655 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1656 return 0;
1657 s->mode = mode;
1658 }
1659 return 1;
1660 }
1661
1662 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1663 {
1664 ParallelCharDriver *drv = chr->opaque;
1665 int fd = drv->fd;
1666 uint8_t b;
1667
1668 switch(cmd) {
1669 case CHR_IOCTL_PP_READ_DATA:
1670 if (ioctl(fd, PPRDATA, &b) < 0)
1671 return -ENOTSUP;
1672 *(uint8_t *)arg = b;
1673 break;
1674 case CHR_IOCTL_PP_WRITE_DATA:
1675 b = *(uint8_t *)arg;
1676 if (ioctl(fd, PPWDATA, &b) < 0)
1677 return -ENOTSUP;
1678 break;
1679 case CHR_IOCTL_PP_READ_CONTROL:
1680 if (ioctl(fd, PPRCONTROL, &b) < 0)
1681 return -ENOTSUP;
1682 /* Linux gives only the lowest bits, and no way to know data
1683 direction! For better compatibility set the fixed upper
1684 bits. */
1685 *(uint8_t *)arg = b | 0xc0;
1686 break;
1687 case CHR_IOCTL_PP_WRITE_CONTROL:
1688 b = *(uint8_t *)arg;
1689 if (ioctl(fd, PPWCONTROL, &b) < 0)
1690 return -ENOTSUP;
1691 break;
1692 case CHR_IOCTL_PP_READ_STATUS:
1693 if (ioctl(fd, PPRSTATUS, &b) < 0)
1694 return -ENOTSUP;
1695 *(uint8_t *)arg = b;
1696 break;
1697 case CHR_IOCTL_PP_DATA_DIR:
1698 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1699 return -ENOTSUP;
1700 break;
1701 case CHR_IOCTL_PP_EPP_READ_ADDR:
1702 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1703 struct ParallelIOArg *parg = arg;
1704 int n = read(fd, parg->buffer, parg->count);
1705 if (n != parg->count) {
1706 return -EIO;
1707 }
1708 }
1709 break;
1710 case CHR_IOCTL_PP_EPP_READ:
1711 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1712 struct ParallelIOArg *parg = arg;
1713 int n = read(fd, parg->buffer, parg->count);
1714 if (n != parg->count) {
1715 return -EIO;
1716 }
1717 }
1718 break;
1719 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1720 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1721 struct ParallelIOArg *parg = arg;
1722 int n = write(fd, parg->buffer, parg->count);
1723 if (n != parg->count) {
1724 return -EIO;
1725 }
1726 }
1727 break;
1728 case CHR_IOCTL_PP_EPP_WRITE:
1729 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1730 struct ParallelIOArg *parg = arg;
1731 int n = write(fd, parg->buffer, parg->count);
1732 if (n != parg->count) {
1733 return -EIO;
1734 }
1735 }
1736 break;
1737 default:
1738 return -ENOTSUP;
1739 }
1740 return 0;
1741 }
1742
1743 static void pp_close(CharDriverState *chr)
1744 {
1745 ParallelCharDriver *drv = chr->opaque;
1746 int fd = drv->fd;
1747
1748 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1749 ioctl(fd, PPRELEASE);
1750 close(fd);
1751 g_free(drv);
1752 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1753 }
1754
1755 static CharDriverState *qemu_chr_open_pp_fd(int fd, Error **errp)
1756 {
1757 CharDriverState *chr;
1758 ParallelCharDriver *drv;
1759
1760 if (ioctl(fd, PPCLAIM) < 0) {
1761 error_setg_errno(errp, errno, "not a parallel port");
1762 close(fd);
1763 return NULL;
1764 }
1765
1766 drv = g_new0(ParallelCharDriver, 1);
1767 drv->fd = fd;
1768 drv->mode = IEEE1284_MODE_COMPAT;
1769
1770 chr = qemu_chr_alloc();
1771 chr->chr_write = null_chr_write;
1772 chr->chr_ioctl = pp_ioctl;
1773 chr->chr_close = pp_close;
1774 chr->opaque = drv;
1775
1776 return chr;
1777 }
1778 #endif /* __linux__ */
1779
1780 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1781
1782 #define HAVE_CHARDEV_PARPORT 1
1783
1784 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1785 {
1786 int fd = (int)(intptr_t)chr->opaque;
1787 uint8_t b;
1788
1789 switch(cmd) {
1790 case CHR_IOCTL_PP_READ_DATA:
1791 if (ioctl(fd, PPIGDATA, &b) < 0)
1792 return -ENOTSUP;
1793 *(uint8_t *)arg = b;
1794 break;
1795 case CHR_IOCTL_PP_WRITE_DATA:
1796 b = *(uint8_t *)arg;
1797 if (ioctl(fd, PPISDATA, &b) < 0)
1798 return -ENOTSUP;
1799 break;
1800 case CHR_IOCTL_PP_READ_CONTROL:
1801 if (ioctl(fd, PPIGCTRL, &b) < 0)
1802 return -ENOTSUP;
1803 *(uint8_t *)arg = b;
1804 break;
1805 case CHR_IOCTL_PP_WRITE_CONTROL:
1806 b = *(uint8_t *)arg;
1807 if (ioctl(fd, PPISCTRL, &b) < 0)
1808 return -ENOTSUP;
1809 break;
1810 case CHR_IOCTL_PP_READ_STATUS:
1811 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1812 return -ENOTSUP;
1813 *(uint8_t *)arg = b;
1814 break;
1815 default:
1816 return -ENOTSUP;
1817 }
1818 return 0;
1819 }
1820
1821 static CharDriverState *qemu_chr_open_pp_fd(int fd, Error **errp)
1822 {
1823 CharDriverState *chr;
1824
1825 chr = qemu_chr_alloc();
1826 chr->opaque = (void *)(intptr_t)fd;
1827 chr->chr_write = null_chr_write;
1828 chr->chr_ioctl = pp_ioctl;
1829 chr->explicit_be_open = true;
1830 return chr;
1831 }
1832 #endif
1833
1834 #else /* _WIN32 */
1835
1836 #define HAVE_CHARDEV_SERIAL 1
1837
1838 typedef struct {
1839 int max_size;
1840 HANDLE hcom, hrecv, hsend;
1841 OVERLAPPED orecv;
1842 BOOL fpipe;
1843 DWORD len;
1844
1845 /* Protected by the CharDriverState chr_write_lock. */
1846 OVERLAPPED osend;
1847 } WinCharState;
1848
1849 typedef struct {
1850 HANDLE hStdIn;
1851 HANDLE hInputReadyEvent;
1852 HANDLE hInputDoneEvent;
1853 HANDLE hInputThread;
1854 uint8_t win_stdio_buf;
1855 } WinStdioCharState;
1856
1857 #define NSENDBUF 2048
1858 #define NRECVBUF 2048
1859 #define MAXCONNECT 1
1860 #define NTIMEOUT 5000
1861
1862 static int win_chr_poll(void *opaque);
1863 static int win_chr_pipe_poll(void *opaque);
1864
1865 static void win_chr_close(CharDriverState *chr)
1866 {
1867 WinCharState *s = chr->opaque;
1868
1869 if (s->hsend) {
1870 CloseHandle(s->hsend);
1871 s->hsend = NULL;
1872 }
1873 if (s->hrecv) {
1874 CloseHandle(s->hrecv);
1875 s->hrecv = NULL;
1876 }
1877 if (s->hcom) {
1878 CloseHandle(s->hcom);
1879 s->hcom = NULL;
1880 }
1881 if (s->fpipe)
1882 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1883 else
1884 qemu_del_polling_cb(win_chr_poll, chr);
1885
1886 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1887 }
1888
1889 static int win_chr_init(CharDriverState *chr, const char *filename, Error **errp)
1890 {
1891 WinCharState *s = chr->opaque;
1892 COMMCONFIG comcfg;
1893 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1894 COMSTAT comstat;
1895 DWORD size;
1896 DWORD err;
1897
1898 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1899 if (!s->hsend) {
1900 error_setg(errp, "Failed CreateEvent");
1901 goto fail;
1902 }
1903 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1904 if (!s->hrecv) {
1905 error_setg(errp, "Failed CreateEvent");
1906 goto fail;
1907 }
1908
1909 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1910 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1911 if (s->hcom == INVALID_HANDLE_VALUE) {
1912 error_setg(errp, "Failed CreateFile (%lu)", GetLastError());
1913 s->hcom = NULL;
1914 goto fail;
1915 }
1916
1917 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1918 error_setg(errp, "Failed SetupComm");
1919 goto fail;
1920 }
1921
1922 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1923 size = sizeof(COMMCONFIG);
1924 GetDefaultCommConfig(filename, &comcfg, &size);
1925 comcfg.dcb.DCBlength = sizeof(DCB);
1926 CommConfigDialog(filename, NULL, &comcfg);
1927
1928 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1929 error_setg(errp, "Failed SetCommState");
1930 goto fail;
1931 }
1932
1933 if (!SetCommMask(s->hcom, EV_ERR)) {
1934 error_setg(errp, "Failed SetCommMask");
1935 goto fail;
1936 }
1937
1938 cto.ReadIntervalTimeout = MAXDWORD;
1939 if (!SetCommTimeouts(s->hcom, &cto)) {
1940 error_setg(errp, "Failed SetCommTimeouts");
1941 goto fail;
1942 }
1943
1944 if (!ClearCommError(s->hcom, &err, &comstat)) {
1945 error_setg(errp, "Failed ClearCommError");
1946 goto fail;
1947 }
1948 qemu_add_polling_cb(win_chr_poll, chr);
1949 return 0;
1950
1951 fail:
1952 win_chr_close(chr);
1953 return -1;
1954 }
1955
1956 /* Called with chr_write_lock held. */
1957 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1958 {
1959 WinCharState *s = chr->opaque;
1960 DWORD len, ret, size, err;
1961
1962 len = len1;
1963 ZeroMemory(&s->osend, sizeof(s->osend));
1964 s->osend.hEvent = s->hsend;
1965 while (len > 0) {
1966 if (s->hsend)
1967 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1968 else
1969 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1970 if (!ret) {
1971 err = GetLastError();
1972 if (err == ERROR_IO_PENDING) {
1973 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1974 if (ret) {
1975 buf += size;
1976 len -= size;
1977 } else {
1978 break;
1979 }
1980 } else {
1981 break;
1982 }
1983 } else {
1984 buf += size;
1985 len -= size;
1986 }
1987 }
1988 return len1 - len;
1989 }
1990
1991 static int win_chr_read_poll(CharDriverState *chr)
1992 {
1993 WinCharState *s = chr->opaque;
1994
1995 s->max_size = qemu_chr_be_can_write(chr);
1996 return s->max_size;
1997 }
1998
1999 static void win_chr_readfile(CharDriverState *chr)
2000 {
2001 WinCharState *s = chr->opaque;
2002 int ret, err;
2003 uint8_t buf[READ_BUF_LEN];
2004 DWORD size;
2005
2006 ZeroMemory(&s->orecv, sizeof(s->orecv));
2007 s->orecv.hEvent = s->hrecv;
2008 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
2009 if (!ret) {
2010 err = GetLastError();
2011 if (err == ERROR_IO_PENDING) {
2012 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
2013 }
2014 }
2015
2016 if (size > 0) {
2017 qemu_chr_be_write(chr, buf, size);
2018 }
2019 }
2020
2021 static void win_chr_read(CharDriverState *chr)
2022 {
2023 WinCharState *s = chr->opaque;
2024
2025 if (s->len > s->max_size)
2026 s->len = s->max_size;
2027 if (s->len == 0)
2028 return;
2029
2030 win_chr_readfile(chr);
2031 }
2032
2033 static int win_chr_poll(void *opaque)
2034 {
2035 CharDriverState *chr = opaque;
2036 WinCharState *s = chr->opaque;
2037 COMSTAT status;
2038 DWORD comerr;
2039
2040 ClearCommError(s->hcom, &comerr, &status);
2041 if (status.cbInQue > 0) {
2042 s->len = status.cbInQue;
2043 win_chr_read_poll(chr);
2044 win_chr_read(chr);
2045 return 1;
2046 }
2047 return 0;
2048 }
2049
2050 static CharDriverState *qemu_chr_open_win_path(const char *filename,
2051 Error **errp)
2052 {
2053 CharDriverState *chr;
2054 WinCharState *s;
2055
2056 chr = qemu_chr_alloc();
2057 s = g_new0(WinCharState, 1);
2058 chr->opaque = s;
2059 chr->chr_write = win_chr_write;
2060 chr->chr_close = win_chr_close;
2061
2062 if (win_chr_init(chr, filename, errp) < 0) {
2063 g_free(s);
2064 g_free(chr);
2065 return NULL;
2066 }
2067 return chr;
2068 }
2069
2070 static int win_chr_pipe_poll(void *opaque)
2071 {
2072 CharDriverState *chr = opaque;
2073 WinCharState *s = chr->opaque;
2074 DWORD size;
2075
2076 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
2077 if (size > 0) {
2078 s->len = size;
2079 win_chr_read_poll(chr);
2080 win_chr_read(chr);
2081 return 1;
2082 }
2083 return 0;
2084 }
2085
2086 static int win_chr_pipe_init(CharDriverState *chr, const char *filename,
2087 Error **errp)
2088 {
2089 WinCharState *s = chr->opaque;
2090 OVERLAPPED ov;
2091 int ret;
2092 DWORD size;
2093 char openname[CHR_MAX_FILENAME_SIZE];
2094
2095 s->fpipe = TRUE;
2096
2097 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
2098 if (!s->hsend) {
2099 error_setg(errp, "Failed CreateEvent");
2100 goto fail;
2101 }
2102 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
2103 if (!s->hrecv) {
2104 error_setg(errp, "Failed CreateEvent");
2105 goto fail;
2106 }
2107
2108 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
2109 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
2110 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
2111 PIPE_WAIT,
2112 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
2113 if (s->hcom == INVALID_HANDLE_VALUE) {
2114 error_setg(errp, "Failed CreateNamedPipe (%lu)", GetLastError());
2115 s->hcom = NULL;
2116 goto fail;
2117 }
2118
2119 ZeroMemory(&ov, sizeof(ov));
2120 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
2121 ret = ConnectNamedPipe(s->hcom, &ov);
2122 if (ret) {
2123 error_setg(errp, "Failed ConnectNamedPipe");
2124 goto fail;
2125 }
2126
2127 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
2128 if (!ret) {
2129 error_setg(errp, "Failed GetOverlappedResult");
2130 if (ov.hEvent) {
2131 CloseHandle(ov.hEvent);
2132 ov.hEvent = NULL;
2133 }
2134 goto fail;
2135 }
2136
2137 if (ov.hEvent) {
2138 CloseHandle(ov.hEvent);
2139 ov.hEvent = NULL;
2140 }
2141 qemu_add_polling_cb(win_chr_pipe_poll, chr);
2142 return 0;
2143
2144 fail:
2145 win_chr_close(chr);
2146 return -1;
2147 }
2148
2149
2150 static CharDriverState *qemu_chr_open_pipe(const char *id,
2151 ChardevBackend *backend,
2152 ChardevReturn *ret,
2153 Error **errp)
2154 {
2155 ChardevHostdev *opts = backend->u.pipe;
2156 const char *filename = opts->device;
2157 CharDriverState *chr;
2158 WinCharState *s;
2159
2160 chr = qemu_chr_alloc();
2161 s = g_new0(WinCharState, 1);
2162 chr->opaque = s;
2163 chr->chr_write = win_chr_write;
2164 chr->chr_close = win_chr_close;
2165
2166 if (win_chr_pipe_init(chr, filename, errp) < 0) {
2167 g_free(s);
2168 g_free(chr);
2169 return NULL;
2170 }
2171 return chr;
2172 }
2173
2174 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
2175 {
2176 CharDriverState *chr;
2177 WinCharState *s;
2178
2179 chr = qemu_chr_alloc();
2180 s = g_new0(WinCharState, 1);
2181 s->hcom = fd_out;
2182 chr->opaque = s;
2183 chr->chr_write = win_chr_write;
2184 return chr;
2185 }
2186
2187 static CharDriverState *qemu_chr_open_win_con(const char *id,
2188 ChardevBackend *backend,
2189 ChardevReturn *ret,
2190 Error **errp)
2191 {
2192 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
2193 }
2194
2195 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
2196 {
2197 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
2198 DWORD dwSize;
2199 int len1;
2200
2201 len1 = len;
2202
2203 while (len1 > 0) {
2204 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
2205 break;
2206 }
2207 buf += dwSize;
2208 len1 -= dwSize;
2209 }
2210
2211 return len - len1;
2212 }
2213
2214 static void win_stdio_wait_func(void *opaque)
2215 {
2216 CharDriverState *chr = opaque;
2217 WinStdioCharState *stdio = chr->opaque;
2218 INPUT_RECORD buf[4];
2219 int ret;
2220 DWORD dwSize;
2221 int i;
2222
2223 ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize);
2224
2225 if (!ret) {
2226 /* Avoid error storm */
2227 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2228 return;
2229 }
2230
2231 for (i = 0; i < dwSize; i++) {
2232 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2233
2234 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2235 int j;
2236 if (kev->uChar.AsciiChar != 0) {
2237 for (j = 0; j < kev->wRepeatCount; j++) {
2238 if (qemu_chr_be_can_write(chr)) {
2239 uint8_t c = kev->uChar.AsciiChar;
2240 qemu_chr_be_write(chr, &c, 1);
2241 }
2242 }
2243 }
2244 }
2245 }
2246 }
2247
2248 static DWORD WINAPI win_stdio_thread(LPVOID param)
2249 {
2250 CharDriverState *chr = param;
2251 WinStdioCharState *stdio = chr->opaque;
2252 int ret;
2253 DWORD dwSize;
2254
2255 while (1) {
2256
2257 /* Wait for one byte */
2258 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2259
2260 /* Exit in case of error, continue if nothing read */
2261 if (!ret) {
2262 break;
2263 }
2264 if (!dwSize) {
2265 continue;
2266 }
2267
2268 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2269 if (stdio->win_stdio_buf == '\r') {
2270 continue;
2271 }
2272
2273 /* Signal the main thread and wait until the byte was eaten */
2274 if (!SetEvent(stdio->hInputReadyEvent)) {
2275 break;
2276 }
2277 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2278 != WAIT_OBJECT_0) {
2279 break;
2280 }
2281 }
2282
2283 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2284 return 0;
2285 }
2286
2287 static void win_stdio_thread_wait_func(void *opaque)
2288 {
2289 CharDriverState *chr = opaque;
2290 WinStdioCharState *stdio = chr->opaque;
2291
2292 if (qemu_chr_be_can_write(chr)) {
2293 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2294 }
2295
2296 SetEvent(stdio->hInputDoneEvent);
2297 }
2298
2299 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2300 {
2301 WinStdioCharState *stdio = chr->opaque;
2302 DWORD dwMode = 0;
2303
2304 GetConsoleMode(stdio->hStdIn, &dwMode);
2305
2306 if (echo) {
2307 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2308 } else {
2309 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2310 }
2311 }
2312
2313 static void win_stdio_close(CharDriverState *chr)
2314 {
2315 WinStdioCharState *stdio = chr->opaque;
2316
2317 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2318 CloseHandle(stdio->hInputReadyEvent);
2319 }
2320 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2321 CloseHandle(stdio->hInputDoneEvent);
2322 }
2323 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2324 TerminateThread(stdio->hInputThread, 0);
2325 }
2326
2327 g_free(chr->opaque);
2328 g_free(chr);
2329 }
2330
2331 static CharDriverState *qemu_chr_open_stdio(const char *id,
2332 ChardevBackend *backend,
2333 ChardevReturn *ret,
2334 Error **errp)
2335 {
2336 CharDriverState *chr;
2337 WinStdioCharState *stdio;
2338 DWORD dwMode;
2339 int is_console = 0;
2340
2341 chr = qemu_chr_alloc();
2342 stdio = g_new0(WinStdioCharState, 1);
2343
2344 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2345 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2346 error_setg(errp, "cannot open stdio: invalid handle");
2347 return NULL;
2348 }
2349
2350 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2351
2352 chr->opaque = stdio;
2353 chr->chr_write = win_stdio_write;
2354 chr->chr_close = win_stdio_close;
2355
2356 if (is_console) {
2357 if (qemu_add_wait_object(stdio->hStdIn,
2358 win_stdio_wait_func, chr)) {
2359 error_setg(errp, "qemu_add_wait_object: failed");
2360 goto err1;
2361 }
2362 } else {
2363 DWORD dwId;
2364
2365 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2366 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2367 if (stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2368 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2369 error_setg(errp, "cannot create event");
2370 goto err2;
2371 }
2372 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2373 win_stdio_thread_wait_func, chr)) {
2374 error_setg(errp, "qemu_add_wait_object: failed");
2375 goto err2;
2376 }
2377 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2378 chr, 0, &dwId);
2379
2380 if (stdio->hInputThread == INVALID_HANDLE_VALUE) {
2381 error_setg(errp, "cannot create stdio thread");
2382 goto err3;
2383 }
2384 }
2385
2386 dwMode |= ENABLE_LINE_INPUT;
2387
2388 if (is_console) {
2389 /* set the terminal in raw mode */
2390 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2391 dwMode |= ENABLE_PROCESSED_INPUT;
2392 }
2393
2394 SetConsoleMode(stdio->hStdIn, dwMode);
2395
2396 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2397 qemu_chr_fe_set_echo(chr, false);
2398
2399 return chr;
2400
2401 err3:
2402 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2403 err2:
2404 CloseHandle(stdio->hInputReadyEvent);
2405 CloseHandle(stdio->hInputDoneEvent);
2406 err1:
2407 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2408 return NULL;
2409 }
2410 #endif /* !_WIN32 */
2411
2412
2413 /***********************************************************/
2414 /* UDP Net console */
2415
2416 typedef struct {
2417 int fd;
2418 GIOChannel *chan;
2419 uint8_t buf[READ_BUF_LEN];
2420 int bufcnt;
2421 int bufptr;
2422 int max_size;
2423 } NetCharDriver;
2424
2425 /* Called with chr_write_lock held. */
2426 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2427 {
2428 NetCharDriver *s = chr->opaque;
2429 gsize bytes_written;
2430 GIOStatus status;
2431
2432 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2433 if (status == G_IO_STATUS_EOF) {
2434 return 0;
2435 } else if (status != G_IO_STATUS_NORMAL) {
2436 return -1;
2437 }
2438
2439 return bytes_written;
2440 }
2441
2442 static int udp_chr_read_poll(void *opaque)
2443 {
2444 CharDriverState *chr = opaque;
2445 NetCharDriver *s = chr->opaque;
2446
2447 s->max_size = qemu_chr_be_can_write(chr);
2448
2449 /* If there were any stray characters in the queue process them
2450 * first
2451 */
2452 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2453 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2454 s->bufptr++;
2455 s->max_size = qemu_chr_be_can_write(chr);
2456 }
2457 return s->max_size;
2458 }
2459
2460 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2461 {
2462 CharDriverState *chr = opaque;
2463 NetCharDriver *s = chr->opaque;
2464 gsize bytes_read = 0;
2465 GIOStatus status;
2466
2467 if (s->max_size == 0) {
2468 return TRUE;
2469 }
2470 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2471 &bytes_read, NULL);
2472 s->bufcnt = bytes_read;
2473 s->bufptr = s->bufcnt;
2474 if (status != G_IO_STATUS_NORMAL) {
2475 remove_fd_in_watch(chr);
2476 return FALSE;
2477 }
2478
2479 s->bufptr = 0;
2480 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2481 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2482 s->bufptr++;
2483 s->max_size = qemu_chr_be_can_write(chr);
2484 }
2485
2486 return TRUE;
2487 }
2488
2489 static void udp_chr_update_read_handler(CharDriverState *chr)
2490 {
2491 NetCharDriver *s = chr->opaque;
2492
2493 remove_fd_in_watch(chr);
2494 if (s->chan) {
2495 chr->fd_in_tag = io_add_watch_poll(s->chan, udp_chr_read_poll,
2496 udp_chr_read, chr);
2497 }
2498 }
2499
2500 static void udp_chr_close(CharDriverState *chr)
2501 {
2502 NetCharDriver *s = chr->opaque;
2503
2504 remove_fd_in_watch(chr);
2505 if (s->chan) {
2506 g_io_channel_unref(s->chan);
2507 closesocket(s->fd);
2508 }
2509 g_free(s);
2510 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2511 }
2512
2513 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2514 {
2515 CharDriverState *chr = NULL;
2516 NetCharDriver *s = NULL;
2517
2518 chr = qemu_chr_alloc();
2519 s = g_new0(NetCharDriver, 1);
2520
2521 s->fd = fd;
2522 s->chan = io_channel_from_socket(s->fd);
2523 s->bufcnt = 0;
2524 s->bufptr = 0;
2525 chr->opaque = s;
2526 chr->chr_write = udp_chr_write;
2527 chr->chr_update_read_handler = udp_chr_update_read_handler;
2528 chr->chr_close = udp_chr_close;
2529 /* be isn't opened until we get a connection */
2530 chr->explicit_be_open = true;
2531 return chr;
2532 }
2533
2534 /***********************************************************/
2535 /* TCP Net console */
2536
2537 typedef struct {
2538
2539 GIOChannel *chan, *listen_chan;
2540 guint listen_tag;
2541 int fd, listen_fd;
2542 int connected;
2543 int max_size;
2544 int do_telnetopt;
2545 int do_nodelay;
2546 int is_unix;
2547 int *read_msgfds;
2548 int read_msgfds_num;
2549 int *write_msgfds;
2550 int write_msgfds_num;
2551
2552 SocketAddress *addr;
2553 bool is_listen;
2554 bool is_telnet;
2555
2556 guint reconnect_timer;
2557 int64_t reconnect_time;
2558 bool connect_err_reported;
2559 } TCPCharDriver;
2560
2561 static gboolean socket_reconnect_timeout(gpointer opaque);
2562
2563 static void qemu_chr_socket_restart_timer(CharDriverState *chr)
2564 {
2565 TCPCharDriver *s = chr->opaque;
2566 assert(s->connected == 0);
2567 s->reconnect_timer = g_timeout_add_seconds(s->reconnect_time,
2568 socket_reconnect_timeout, chr);
2569 }
2570
2571 static void check_report_connect_error(CharDriverState *chr,
2572 Error *err)
2573 {
2574 TCPCharDriver *s = chr->opaque;
2575
2576 if (!s->connect_err_reported) {
2577 error_report("Unable to connect character device %s: %s",
2578 chr->label, error_get_pretty(err));
2579 s->connect_err_reported = true;
2580 }
2581 qemu_chr_socket_restart_timer(chr);
2582 }
2583
2584 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2585
2586 #ifndef _WIN32
2587 static int unix_send_msgfds(CharDriverState *chr, const uint8_t *buf, int len)
2588 {
2589 TCPCharDriver *s = chr->opaque;
2590 struct msghdr msgh;
2591 struct iovec iov;
2592 int r;
2593
2594 size_t fd_size = s->write_msgfds_num * sizeof(int);
2595 char control[CMSG_SPACE(fd_size)];
2596 struct cmsghdr *cmsg;
2597
2598 memset(&msgh, 0, sizeof(msgh));
2599 memset(control, 0, sizeof(control));
2600
2601 /* set the payload */
2602 iov.iov_base = (uint8_t *) buf;
2603 iov.iov_len = len;
2604
2605 msgh.msg_iov = &iov;
2606 msgh.msg_iovlen = 1;
2607
2608 msgh.msg_control = control;
2609 msgh.msg_controllen = sizeof(control);
2610
2611 cmsg = CMSG_FIRSTHDR(&msgh);
2612
2613 cmsg->cmsg_len = CMSG_LEN(fd_size);
2614 cmsg->cmsg_level = SOL_SOCKET;
2615 cmsg->cmsg_type = SCM_RIGHTS;
2616 memcpy(CMSG_DATA(cmsg), s->write_msgfds, fd_size);
2617
2618 do {
2619 r = sendmsg(s->fd, &msgh, 0);
2620 } while (r < 0 && errno == EINTR);
2621
2622 /* free the written msgfds, no matter what */
2623 if (s->write_msgfds_num) {
2624 g_free(s->write_msgfds);
2625 s->write_msgfds = 0;
2626 s->write_msgfds_num = 0;
2627 }
2628
2629 return r;
2630 }
2631 #endif
2632
2633 /* Called with chr_write_lock held. */
2634 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2635 {
2636 TCPCharDriver *s = chr->opaque;
2637 if (s->connected) {
2638 #ifndef _WIN32
2639 if (s->is_unix && s->write_msgfds_num) {
2640 return unix_send_msgfds(chr, buf, len);
2641 } else
2642 #endif
2643 {
2644 return io_channel_send(s->chan, buf, len);
2645 }
2646 } else {
2647 /* XXX: indicate an error ? */
2648 return len;
2649 }
2650 }
2651
2652 static int tcp_chr_read_poll(void *opaque)
2653 {
2654 CharDriverState *chr = opaque;
2655 TCPCharDriver *s = chr->opaque;
2656 if (!s->connected)
2657 return 0;
2658 s->max_size = qemu_chr_be_can_write(chr);
2659 return s->max_size;
2660 }
2661
2662 #define IAC 255
2663 #define IAC_BREAK 243
2664 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2665 TCPCharDriver *s,
2666 uint8_t *buf, int *size)
2667 {
2668 /* Handle any telnet client's basic IAC options to satisfy char by
2669 * char mode with no echo. All IAC options will be removed from
2670 * the buf and the do_telnetopt variable will be used to track the
2671 * state of the width of the IAC information.
2672 *
2673 * IAC commands come in sets of 3 bytes with the exception of the
2674 * "IAC BREAK" command and the double IAC.
2675 */
2676
2677 int i;
2678 int j = 0;
2679
2680 for (i = 0; i < *size; i++) {
2681 if (s->do_telnetopt > 1) {
2682 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2683 /* Double IAC means send an IAC */
2684 if (j != i)
2685 buf[j] = buf[i];
2686 j++;
2687 s->do_telnetopt = 1;
2688 } else {
2689 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2690 /* Handle IAC break commands by sending a serial break */
2691 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2692 s->do_telnetopt++;
2693 }
2694 s->do_telnetopt++;
2695 }
2696 if (s->do_telnetopt >= 4) {
2697 s->do_telnetopt = 1;
2698 }
2699 } else {
2700 if ((unsigned char)buf[i] == IAC) {
2701 s->do_telnetopt = 2;
2702 } else {
2703 if (j != i)
2704 buf[j] = buf[i];
2705 j++;
2706 }
2707 }
2708 }
2709 *size = j;
2710 }
2711
2712 static int tcp_get_msgfds(CharDriverState *chr, int *fds, int num)
2713 {
2714 TCPCharDriver *s = chr->opaque;
2715 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
2716
2717 assert(num <= TCP_MAX_FDS);
2718
2719 if (to_copy) {
2720 int i;
2721
2722 memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
2723
2724 /* Close unused fds */
2725 for (i = to_copy; i < s->read_msgfds_num; i++) {
2726 close(s->read_msgfds[i]);
2727 }
2728
2729 g_free(s->read_msgfds);
2730 s->read_msgfds = 0;
2731 s->read_msgfds_num = 0;
2732 }
2733
2734 return to_copy;
2735 }
2736
2737 static int tcp_set_msgfds(CharDriverState *chr, int *fds, int num)
2738 {
2739 TCPCharDriver *s = chr->opaque;
2740
2741 /* clear old pending fd array */
2742 g_free(s->write_msgfds);
2743
2744 if (num) {
2745 s->write_msgfds = g_new(int, num);
2746 memcpy(s->write_msgfds, fds, num * sizeof(int));
2747 }
2748
2749 s->write_msgfds_num = num;
2750
2751 return 0;
2752 }
2753
2754 #ifndef _WIN32
2755 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2756 {
2757 TCPCharDriver *s = chr->opaque;
2758 struct cmsghdr *cmsg;
2759
2760 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2761 int fd_size, i;
2762
2763 if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) ||
2764 cmsg->cmsg_level != SOL_SOCKET ||
2765 cmsg->cmsg_type != SCM_RIGHTS) {
2766 continue;
2767 }
2768
2769 fd_size = cmsg->cmsg_len - CMSG_LEN(0);
2770
2771 if (!fd_size) {
2772 continue;
2773 }
2774
2775 /* close and clean read_msgfds */
2776 for (i = 0; i < s->read_msgfds_num; i++) {
2777 close(s->read_msgfds[i]);
2778 }
2779
2780 if (s->read_msgfds_num) {
2781 g_free(s->read_msgfds);
2782 }
2783
2784 s->read_msgfds_num = fd_size / sizeof(int);
2785 s->read_msgfds = g_malloc(fd_size);
2786 memcpy(s->read_msgfds, CMSG_DATA(cmsg), fd_size);
2787
2788 for (i = 0; i < s->read_msgfds_num; i++) {
2789 int fd = s->read_msgfds[i];
2790 if (fd < 0) {
2791 continue;
2792 }
2793
2794 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2795 qemu_set_block(fd);
2796
2797 #ifndef MSG_CMSG_CLOEXEC
2798 qemu_set_cloexec(fd);
2799 #endif
2800 }
2801 }
2802 }
2803
2804 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2805 {
2806 TCPCharDriver *s = chr->opaque;
2807 struct msghdr msg = { NULL, };
2808 struct iovec iov[1];
2809 union {
2810 struct cmsghdr cmsg;
2811 char control[CMSG_SPACE(sizeof(int) * TCP_MAX_FDS)];
2812 } msg_control;
2813 int flags = 0;
2814 ssize_t ret;
2815
2816 iov[0].iov_base = buf;
2817 iov[0].iov_len = len;
2818
2819 msg.msg_iov = iov;
2820 msg.msg_iovlen = 1;
2821 msg.msg_control = &msg_control;
2822 msg.msg_controllen = sizeof(msg_control);
2823
2824 #ifdef MSG_CMSG_CLOEXEC
2825 flags |= MSG_CMSG_CLOEXEC;
2826 #endif
2827 do {
2828 ret = recvmsg(s->fd, &msg, flags);
2829 } while (ret == -1 && errno == EINTR);
2830
2831 if (ret > 0 && s->is_unix) {
2832 unix_process_msgfd(chr, &msg);
2833 }
2834
2835 return ret;
2836 }
2837 #else
2838 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2839 {
2840 TCPCharDriver *s = chr->opaque;
2841 ssize_t ret;
2842
2843 do {
2844 ret = qemu_recv(s->fd, buf, len, 0);
2845 } while (ret == -1 && socket_error() == EINTR);
2846
2847 return ret;
2848 }
2849 #endif
2850
2851 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2852 {
2853 TCPCharDriver *s = chr->opaque;
2854 return g_io_create_watch(s->chan, cond);
2855 }
2856
2857 static void tcp_chr_disconnect(CharDriverState *chr)
2858 {
2859 TCPCharDriver *s = chr->opaque;
2860
2861 s->connected = 0;
2862 if (s->listen_chan) {
2863 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN,
2864 tcp_chr_accept, chr);
2865 }
2866 remove_fd_in_watch(chr);
2867 g_io_channel_unref(s->chan);
2868 s->chan = NULL;
2869 closesocket(s->fd);
2870 s->fd = -1;
2871 SocketAddress_to_str(chr->filename, CHR_MAX_FILENAME_SIZE,
2872 "disconnected:", s->addr, s->is_listen, s->is_telnet);
2873 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2874 if (s->reconnect_time) {
2875 qemu_chr_socket_restart_timer(chr);
2876 }
2877 }
2878
2879 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2880 {
2881 CharDriverState *chr = opaque;
2882 TCPCharDriver *s = chr->opaque;
2883 uint8_t buf[READ_BUF_LEN];
2884 int len, size;
2885
2886 if (!s->connected || s->max_size <= 0) {
2887 return TRUE;
2888 }
2889 len = sizeof(buf);
2890 if (len > s->max_size)
2891 len = s->max_size;
2892 size = tcp_chr_recv(chr, (void *)buf, len);
2893 if (size == 0 ||
2894 (size < 0 &&
2895 socket_error() != EAGAIN && socket_error() != EWOULDBLOCK)) {
2896 /* connection closed */
2897 tcp_chr_disconnect(chr);
2898 } else if (size > 0) {
2899 if (s->do_telnetopt)
2900 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2901 if (size > 0)
2902 qemu_chr_be_write(chr, buf, size);
2903 }
2904
2905 return TRUE;
2906 }
2907
2908 static int tcp_chr_sync_read(CharDriverState *chr, const uint8_t *buf, int len)
2909 {
2910 TCPCharDriver *s = chr->opaque;
2911 int size;
2912
2913 if (!s->connected) {
2914 return 0;
2915 }
2916
2917 size = tcp_chr_recv(chr, (void *) buf, len);
2918 if (size == 0) {
2919 /* connection closed */
2920 tcp_chr_disconnect(chr);
2921 }
2922
2923 return size;
2924 }
2925
2926 #ifndef _WIN32
2927 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2928 {
2929 CharDriverState *chr = qemu_chr_open_fd(eventfd, eventfd);
2930
2931 if (chr) {
2932 chr->avail_connections = 1;
2933 }
2934
2935 return chr;
2936 }
2937 #endif
2938
2939 static void tcp_chr_connect(void *opaque)
2940 {
2941 CharDriverState *chr = opaque;
2942 TCPCharDriver *s = chr->opaque;
2943 struct sockaddr_storage ss, ps;
2944 socklen_t ss_len = sizeof(ss), ps_len = sizeof(ps);
2945
2946 memset(&ss, 0, ss_len);
2947 if (getsockname(s->fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2948 snprintf(chr->filename, CHR_MAX_FILENAME_SIZE,
2949 "Error in getsockname: %s\n", strerror(errno));
2950 } else if (getpeername(s->fd, (struct sockaddr *) &ps, &ps_len) != 0) {
2951 snprintf(chr->filename, CHR_MAX_FILENAME_SIZE,
2952 "Error in getpeername: %s\n", strerror(errno));
2953 } else {
2954 sockaddr_to_str(chr->filename, CHR_MAX_FILENAME_SIZE,
2955 &ss, ss_len, &ps, ps_len,
2956 s->is_listen, s->is_telnet);
2957 }
2958
2959 s->connected = 1;
2960 if (s->chan) {
2961 chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
2962 tcp_chr_read, chr);
2963 }
2964 qemu_chr_be_generic_open(chr);
2965 }
2966
2967 static void tcp_chr_update_read_handler(CharDriverState *chr)
2968 {
2969 TCPCharDriver *s = chr->opaque;
2970
2971 remove_fd_in_watch(chr);
2972 if (s->chan) {
2973 chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
2974 tcp_chr_read, chr);
2975 }
2976 }
2977
2978 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2979 static void tcp_chr_telnet_init(int fd)
2980 {
2981 char buf[3];
2982 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2983 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2984 send(fd, (char *)buf, 3, 0);
2985 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2986 send(fd, (char *)buf, 3, 0);
2987 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2988 send(fd, (char *)buf, 3, 0);
2989 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2990 send(fd, (char *)buf, 3, 0);
2991 }
2992
2993 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2994 {
2995 TCPCharDriver *s = chr->opaque;
2996 if (s->fd != -1)
2997 return -1;
2998
2999 qemu_set_nonblock(fd);
3000 if (s->do_nodelay)
3001 socket_set_nodelay(fd);
3002 s->fd = fd;
3003 s->chan = io_channel_from_socket(fd);
3004 if (s->listen_tag) {
3005 g_source_remove(s->listen_tag);
3006 s->listen_tag = 0;
3007 }
3008 tcp_chr_connect(chr);
3009
3010 return 0;
3011 }
3012
3013 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
3014 {
3015 CharDriverState *chr = opaque;
3016 TCPCharDriver *s = chr->opaque;
3017 struct sockaddr_in saddr;
3018 #ifndef _WIN32
3019 struct sockaddr_un uaddr;
3020 #endif
3021 struct sockaddr *addr;
3022 socklen_t len;
3023 int fd;
3024
3025 for(;;) {
3026 #ifndef _WIN32
3027 if (s->is_unix) {
3028 len = sizeof(uaddr);
3029 addr = (struct sockaddr *)&uaddr;
3030 } else
3031 #endif
3032 {
3033 len = sizeof(saddr);
3034 addr = (struct sockaddr *)&saddr;
3035 }
3036 fd = qemu_accept(s->listen_fd, addr, &len);
3037 if (fd < 0 && errno != EINTR) {
3038 s->listen_tag = 0;
3039 return FALSE;
3040 } else if (fd >= 0) {
3041 if (s->do_telnetopt)
3042 tcp_chr_telnet_init(fd);
3043 break;
3044 }
3045 }
3046 if (tcp_chr_add_client(chr, fd) < 0)
3047 close(fd);
3048
3049 return TRUE;
3050 }
3051
3052 static void tcp_chr_close(CharDriverState *chr)
3053 {
3054 TCPCharDriver *s = chr->opaque;
3055 int i;
3056
3057 if (s->reconnect_timer) {
3058 g_source_remove(s->reconnect_timer);
3059 s->reconnect_timer = 0;
3060 }
3061 qapi_free_SocketAddress(s->addr);
3062 if (s->fd >= 0) {
3063 remove_fd_in_watch(chr);
3064 if (s->chan) {
3065 g_io_channel_unref(s->chan);
3066 }
3067 closesocket(s->fd);
3068 }
3069 if (s->listen_fd >= 0) {
3070 if (s->listen_tag) {
3071 g_source_remove(s->listen_tag);
3072 s->listen_tag = 0;
3073 }
3074 if (s->listen_chan) {
3075 g_io_channel_unref(s->listen_chan);
3076 }
3077 closesocket(s->listen_fd);
3078 }
3079 if (s->read_msgfds_num) {
3080 for (i = 0; i < s->read_msgfds_num; i++) {
3081 close(s->read_msgfds[i]);
3082 }
3083 g_free(s->read_msgfds);
3084 }
3085 if (s->write_msgfds_num) {
3086 g_free(s->write_msgfds);
3087 }
3088 g_free(s);
3089 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
3090 }
3091
3092 static void qemu_chr_finish_socket_connection(CharDriverState *chr, int fd)
3093 {
3094 TCPCharDriver *s = chr->opaque;
3095
3096 if (s->is_listen) {
3097 s->listen_fd = fd;
3098 s->listen_chan = io_channel_from_socket(s->listen_fd);
3099 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN,
3100 tcp_chr_accept, chr);
3101 } else {
3102 s->connected = 1;
3103 s->fd = fd;
3104 socket_set_nodelay(fd);
3105 s->chan = io_channel_from_socket(s->fd);
3106 tcp_chr_connect(chr);
3107 }
3108 }
3109
3110 static void qemu_chr_socket_connected(int fd, Error *err, void *opaque)
3111 {
3112 CharDriverState *chr = opaque;
3113 TCPCharDriver *s = chr->opaque;
3114
3115 if (fd < 0) {
3116 check_report_connect_error(chr, err);
3117 return;
3118 }
3119
3120 s->connect_err_reported = false;
3121 qemu_chr_finish_socket_connection(chr, fd);
3122 }
3123
3124 static bool qemu_chr_open_socket_fd(CharDriverState *chr, Error **errp)
3125 {
3126 TCPCharDriver *s = chr->opaque;
3127 int fd;
3128
3129 if (s->is_listen) {
3130 fd = socket_listen(s->addr, errp);
3131 } else if (s->reconnect_time) {
3132 fd = socket_connect(s->addr, errp, qemu_chr_socket_connected, chr);
3133 return fd >= 0;
3134 } else {
3135 fd = socket_connect(s->addr, errp, NULL, NULL);
3136 }
3137 if (fd < 0) {
3138 return false;
3139 }
3140
3141 qemu_chr_finish_socket_connection(chr, fd);
3142 return true;
3143 }
3144
3145 /*********************************************************/
3146 /* Ring buffer chardev */
3147
3148 typedef struct {
3149 size_t size;
3150 size_t prod;
3151 size_t cons;
3152 uint8_t *cbuf;
3153 } RingBufCharDriver;
3154
3155 static size_t ringbuf_count(const CharDriverState *chr)
3156 {
3157 const RingBufCharDriver *d = chr->opaque;
3158
3159 return d->prod - d->cons;
3160 }
3161
3162 /* Called with chr_write_lock held. */
3163 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
3164 {
3165 RingBufCharDriver *d = chr->opaque;
3166 int i;
3167
3168 if (!buf || (len < 0)) {
3169 return -1;
3170 }
3171
3172 for (i = 0; i < len; i++ ) {
3173 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
3174 if (d->prod - d->cons > d->size) {
3175 d->cons = d->prod - d->size;
3176 }
3177 }
3178
3179 return 0;
3180 }
3181
3182 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
3183 {
3184 RingBufCharDriver *d = chr->opaque;
3185 int i;
3186
3187 qemu_mutex_lock(&chr->chr_write_lock);
3188 for (i = 0; i < len && d->cons != d->prod; i++) {
3189 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
3190 }
3191 qemu_mutex_unlock(&chr->chr_write_lock);
3192
3193 return i;
3194 }
3195
3196 static void ringbuf_chr_close(struct CharDriverState *chr)
3197 {
3198 RingBufCharDriver *d = chr->opaque;
3199
3200 g_free(d->cbuf);
3201 g_free(d);
3202 chr->opaque = NULL;
3203 }
3204
3205 static CharDriverState *qemu_chr_open_ringbuf(const char *id,
3206 ChardevBackend *backend,
3207 ChardevReturn *ret,
3208 Error **errp)
3209 {
3210 ChardevRingbuf *opts = backend->u.ringbuf;
3211 CharDriverState *chr;
3212 RingBufCharDriver *d;
3213
3214 chr = qemu_chr_alloc();
3215 d = g_malloc(sizeof(*d));
3216
3217 d->size = opts->has_size ? opts->size : 65536;
3218
3219 /* The size must be power of 2 */
3220 if (d->size & (d->size - 1)) {
3221 error_setg(errp, "size of ringbuf chardev must be power of two");
3222 goto fail;
3223 }
3224
3225 d->prod = 0;
3226 d->cons = 0;
3227 d->cbuf = g_malloc0(d->size);
3228
3229 chr->opaque = d;
3230 chr->chr_write = ringbuf_chr_write;
3231 chr->chr_close = ringbuf_chr_close;
3232
3233 return chr;
3234
3235 fail:
3236 g_free(d);
3237 g_free(chr);
3238 return NULL;
3239 }
3240
3241 bool chr_is_ringbuf(const CharDriverState *chr)
3242 {
3243 return chr->chr_write == ringbuf_chr_write;
3244 }
3245
3246 void qmp_ringbuf_write(const char *device, const char *data,
3247 bool has_format, enum DataFormat format,
3248 Error **errp)
3249 {
3250 CharDriverState *chr;
3251 const uint8_t *write_data;
3252 int ret;
3253 gsize write_count;
3254
3255 chr = qemu_chr_find(device);
3256 if (!chr) {
3257 error_setg(errp, "Device '%s' not found", device);
3258 return;
3259 }
3260
3261 if (!chr_is_ringbuf(chr)) {
3262 error_setg(errp,"%s is not a ringbuf device", device);
3263 return;
3264 }
3265
3266 if (has_format && (format == DATA_FORMAT_BASE64)) {
3267 write_data = g_base64_decode(data, &write_count);
3268 } else {
3269 write_data = (uint8_t *)data;
3270 write_count = strlen(data);
3271 }
3272
3273 ret = ringbuf_chr_write(chr, write_data, write_count);
3274
3275 if (write_data != (uint8_t *)data) {
3276 g_free((void *)write_data);
3277 }
3278
3279 if (ret < 0) {
3280 error_setg(errp, "Failed to write to device %s", device);
3281 return;
3282 }
3283 }
3284
3285 char *qmp_ringbuf_read(const char *device, int64_t size,
3286 bool has_format, enum DataFormat format,
3287 Error **errp)
3288 {
3289 CharDriverState *chr;
3290 uint8_t *read_data;
3291 size_t count;
3292 char *data;
3293
3294 chr = qemu_chr_find(device);
3295 if (!chr) {
3296 error_setg(errp, "Device '%s' not found", device);
3297 return NULL;
3298 }
3299
3300 if (!chr_is_ringbuf(chr)) {
3301 error_setg(errp,"%s is not a ringbuf device", device);
3302 return NULL;
3303 }
3304
3305 if (size <= 0) {
3306 error_setg(errp, "size must be greater than zero");
3307 return NULL;
3308 }
3309
3310 count = ringbuf_count(chr);
3311 size = size > count ? count : size;
3312 read_data = g_malloc(size + 1);
3313
3314 ringbuf_chr_read(chr, read_data, size);
3315
3316 if (has_format && (format == DATA_FORMAT_BASE64)) {
3317 data = g_base64_encode(read_data, size);
3318 g_free(read_data);
3319 } else {
3320 /*
3321 * FIXME should read only complete, valid UTF-8 characters up
3322 * to @size bytes. Invalid sequences should be replaced by a
3323 * suitable replacement character. Except when (and only
3324 * when) ring buffer lost characters since last read, initial
3325 * continuation characters should be dropped.
3326 */
3327 read_data[size] = 0;
3328 data = (char *)read_data;
3329 }
3330
3331 return data;
3332 }
3333
3334 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
3335 {
3336 char host[65], port[33], width[8], height[8];
3337 int pos;
3338 const char *p;
3339 QemuOpts *opts;
3340 Error *local_err = NULL;
3341
3342 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
3343 if (local_err) {
3344 error_report_err(local_err);
3345 return NULL;
3346 }
3347
3348 if (strstart(filename, "mon:", &p)) {
3349 filename = p;
3350 qemu_opt_set(opts, "mux", "on", &error_abort);
3351 if (strcmp(filename, "stdio") == 0) {
3352 /* Monitor is muxed to stdio: do not exit on Ctrl+C by default
3353 * but pass it to the guest. Handle this only for compat syntax,
3354 * for -chardev syntax we have special option for this.
3355 * This is what -nographic did, redirecting+muxing serial+monitor
3356 * to stdio causing Ctrl+C to be passed to guest. */
3357 qemu_opt_set(opts, "signal", "off", &error_abort);
3358 }
3359 }
3360
3361 if (strcmp(filename, "null") == 0 ||
3362 strcmp(filename, "pty") == 0 ||
3363 strcmp(filename, "msmouse") == 0 ||
3364 strcmp(filename, "braille") == 0 ||
3365 strcmp(filename, "testdev") == 0 ||
3366 strcmp(filename, "stdio") == 0) {
3367 qemu_opt_set(opts, "backend", filename, &error_abort);
3368 return opts;
3369 }
3370 if (strstart(filename, "vc", &p)) {
3371 qemu_opt_set(opts, "backend", "vc", &error_abort);
3372 if (*p == ':') {
3373 if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
3374 /* pixels */
3375 qemu_opt_set(opts, "width", width, &error_abort);
3376 qemu_opt_set(opts, "height", height, &error_abort);
3377 } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
3378 /* chars */
3379 qemu_opt_set(opts, "cols", width, &error_abort);
3380 qemu_opt_set(opts, "rows", height, &error_abort);
3381 } else {
3382 goto fail;
3383 }
3384 }
3385 return opts;
3386 }
3387 if (strcmp(filename, "con:") == 0) {
3388 qemu_opt_set(opts, "backend", "console", &error_abort);
3389 return opts;
3390 }
3391 if (strstart(filename, "COM", NULL)) {
3392 qemu_opt_set(opts, "backend", "serial", &error_abort);
3393 qemu_opt_set(opts, "path", filename, &error_abort);
3394 return opts;
3395 }
3396 if (strstart(filename, "file:", &p)) {
3397 qemu_opt_set(opts, "backend", "file", &error_abort);
3398 qemu_opt_set(opts, "path", p, &error_abort);
3399 return opts;
3400 }
3401 if (strstart(filename, "pipe:", &p)) {
3402 qemu_opt_set(opts, "backend", "pipe", &error_abort);
3403 qemu_opt_set(opts, "path", p, &error_abort);
3404 return opts;
3405 }
3406 if (strstart(filename, "tcp:", &p) ||
3407 strstart(filename, "telnet:", &p)) {
3408 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3409 host[0] = 0;
3410 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3411 goto fail;
3412 }
3413 qemu_opt_set(opts, "backend", "socket", &error_abort);
3414 qemu_opt_set(opts, "host", host, &error_abort);
3415 qemu_opt_set(opts, "port", port, &error_abort);
3416 if (p[pos] == ',') {
3417 qemu_opts_do_parse(opts, p+pos+1, NULL, &local_err);
3418 if (local_err) {
3419 error_report_err(local_err);
3420 goto fail;
3421 }
3422 }
3423 if (strstart(filename, "telnet:", &p))
3424 qemu_opt_set(opts, "telnet", "on", &error_abort);
3425 return opts;
3426 }
3427 if (strstart(filename, "udp:", &p)) {
3428 qemu_opt_set(opts, "backend", "udp", &error_abort);
3429 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3430 host[0] = 0;
3431 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3432 goto fail;
3433 }
3434 }
3435 qemu_opt_set(opts, "host", host, &error_abort);
3436 qemu_opt_set(opts, "port", port, &error_abort);
3437 if (p[pos] == '@') {
3438 p += pos + 1;
3439 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3440 host[0] = 0;
3441 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3442 goto fail;
3443 }
3444 }
3445 qemu_opt_set(opts, "localaddr", host, &error_abort);
3446 qemu_opt_set(opts, "localport", port, &error_abort);
3447 }
3448 return opts;
3449 }
3450 if (strstart(filename, "unix:", &p)) {
3451 qemu_opt_set(opts, "backend", "socket", &error_abort);
3452 qemu_opts_do_parse(opts, p, "path", &local_err);
3453 if (local_err) {
3454 error_report_err(local_err);
3455 goto fail;
3456 }
3457 return opts;
3458 }
3459 if (strstart(filename, "/dev/parport", NULL) ||
3460 strstart(filename, "/dev/ppi", NULL)) {
3461 qemu_opt_set(opts, "backend", "parport", &error_abort);
3462 qemu_opt_set(opts, "path", filename, &error_abort);
3463 return opts;
3464 }
3465 if (strstart(filename, "/dev/", NULL)) {
3466 qemu_opt_set(opts, "backend", "tty", &error_abort);
3467 qemu_opt_set(opts, "path", filename, &error_abort);
3468 return opts;
3469 }
3470
3471 fail:
3472 qemu_opts_del(opts);
3473 return NULL;
3474 }
3475
3476 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3477 Error **errp)
3478 {
3479 const char *path = qemu_opt_get(opts, "path");
3480
3481 if (path == NULL) {
3482 error_setg(errp, "chardev: file: no filename given");
3483 return;
3484 }
3485 backend->u.file = g_new0(ChardevFile, 1);
3486 backend->u.file->out = g_strdup(path);
3487
3488 backend->u.file->has_append = true;
3489 backend->u.file->append = qemu_opt_get_bool(opts, "append", false);
3490 }
3491
3492 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3493 Error **errp)
3494 {
3495 backend->u.stdio = g_new0(ChardevStdio, 1);
3496 backend->u.stdio->has_signal = true;
3497 backend->u.stdio->signal = qemu_opt_get_bool(opts, "signal", true);
3498 }
3499
3500 #ifdef HAVE_CHARDEV_SERIAL
3501 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3502 Error **errp)
3503 {
3504 const char *device = qemu_opt_get(opts, "path");
3505
3506 if (device == NULL) {
3507 error_setg(errp, "chardev: serial/tty: no device path given");
3508 return;
3509 }
3510 backend->u.serial = g_new0(ChardevHostdev, 1);
3511 backend->u.serial->device = g_strdup(device);
3512 }
3513 #endif
3514
3515 #ifdef HAVE_CHARDEV_PARPORT
3516 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3517 Error **errp)
3518 {
3519 const char *device = qemu_opt_get(opts, "path");
3520
3521 if (device == NULL) {
3522 error_setg(errp, "chardev: parallel: no device path given");
3523 return;
3524 }
3525 backend->u.parallel = g_new0(ChardevHostdev, 1);
3526 backend->u.parallel->device = g_strdup(device);
3527 }
3528 #endif
3529
3530 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3531 Error **errp)
3532 {
3533 const char *device = qemu_opt_get(opts, "path");
3534
3535 if (device == NULL) {
3536 error_setg(errp, "chardev: pipe: no device path given");
3537 return;
3538 }
3539 backend->u.pipe = g_new0(ChardevHostdev, 1);
3540 backend->u.pipe->device = g_strdup(device);
3541 }
3542
3543 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3544 Error **errp)
3545 {
3546 int val;
3547
3548 backend->u.ringbuf = g_new0(ChardevRingbuf, 1);
3549
3550 val = qemu_opt_get_size(opts, "size", 0);
3551 if (val != 0) {
3552 backend->u.ringbuf->has_size = true;
3553 backend->u.ringbuf->size = val;
3554 }
3555 }
3556
3557 static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
3558 Error **errp)
3559 {
3560 const char *chardev = qemu_opt_get(opts, "chardev");
3561
3562 if (chardev == NULL) {
3563 error_setg(errp, "chardev: mux: no chardev given");
3564 return;
3565 }
3566 backend->u.mux = g_new0(ChardevMux, 1);
3567 backend->u.mux->chardev = g_strdup(chardev);
3568 }
3569
3570 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
3571 Error **errp)
3572 {
3573 bool is_listen = qemu_opt_get_bool(opts, "server", false);
3574 bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true);
3575 bool is_telnet = qemu_opt_get_bool(opts, "telnet", false);
3576 bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true);
3577 int64_t reconnect = qemu_opt_get_number(opts, "reconnect", 0);
3578 const char *path = qemu_opt_get(opts, "path");
3579 const char *host = qemu_opt_get(opts, "host");
3580 const char *port = qemu_opt_get(opts, "port");
3581 SocketAddress *addr;
3582
3583 if (!path) {
3584 if (!host) {
3585 error_setg(errp, "chardev: socket: no host given");
3586 return;
3587 }
3588 if (!port) {
3589 error_setg(errp, "chardev: socket: no port given");
3590 return;
3591 }
3592 }
3593
3594 backend->u.socket = g_new0(ChardevSocket, 1);
3595
3596 backend->u.socket->has_nodelay = true;
3597 backend->u.socket->nodelay = do_nodelay;
3598 backend->u.socket->has_server = true;
3599 backend->u.socket->server = is_listen;
3600 backend->u.socket->has_telnet = true;
3601 backend->u.socket->telnet = is_telnet;
3602 backend->u.socket->has_wait = true;
3603 backend->u.socket->wait = is_waitconnect;
3604 backend->u.socket->has_reconnect = true;
3605 backend->u.socket->reconnect = reconnect;
3606
3607 addr = g_new0(SocketAddress, 1);
3608 if (path) {
3609 addr->type = SOCKET_ADDRESS_KIND_UNIX;
3610 addr->u.q_unix = g_new0(UnixSocketAddress, 1);
3611 addr->u.q_unix->path = g_strdup(path);
3612 } else {
3613 addr->type = SOCKET_ADDRESS_KIND_INET;
3614 addr->u.inet = g_new0(InetSocketAddress, 1);
3615 addr->u.inet->host = g_strdup(host);
3616 addr->u.inet->port = g_strdup(port);
3617 addr->u.inet->has_to = qemu_opt_get(opts, "to");
3618 addr->u.inet->to = qemu_opt_get_number(opts, "to", 0);
3619 addr->u.inet->has_ipv4 = qemu_opt_get(opts, "ipv4");
3620 addr->u.inet->ipv4 = qemu_opt_get_bool(opts, "ipv4", 0);
3621 addr->u.inet->has_ipv6 = qemu_opt_get(opts, "ipv6");
3622 addr->u.inet->ipv6 = qemu_opt_get_bool(opts, "ipv6", 0);
3623 }
3624 backend->u.socket->addr = addr;
3625 }
3626
3627 static void qemu_chr_parse_udp(QemuOpts *opts, ChardevBackend *backend,
3628 Error **errp)
3629 {
3630 const char *host = qemu_opt_get(opts, "host");
3631 const char *port = qemu_opt_get(opts, "port");
3632 const char *localaddr = qemu_opt_get(opts, "localaddr");
3633 const char *localport = qemu_opt_get(opts, "localport");
3634 bool has_local = false;
3635 SocketAddress *addr;
3636
3637 if (host == NULL || strlen(host) == 0) {
3638 host = "localhost";
3639 }
3640 if (port == NULL || strlen(port) == 0) {
3641 error_setg(errp, "chardev: udp: remote port not specified");
3642 return;
3643 }
3644 if (localport == NULL || strlen(localport) == 0) {
3645 localport = "0";
3646 } else {
3647 has_local = true;
3648 }
3649 if (localaddr == NULL || strlen(localaddr) == 0) {
3650 localaddr = "";
3651 } else {
3652 has_local = true;
3653 }
3654
3655 backend->u.udp = g_new0(ChardevUdp, 1);
3656
3657 addr = g_new0(SocketAddress, 1);
3658 addr->type = SOCKET_ADDRESS_KIND_INET;
3659 addr->u.inet = g_new0(InetSocketAddress, 1);
3660 addr->u.inet->host = g_strdup(host);
3661 addr->u.inet->port = g_strdup(port);
3662 addr->u.inet->has_ipv4 = qemu_opt_get(opts, "ipv4");
3663 addr->u.inet->ipv4 = qemu_opt_get_bool(opts, "ipv4", 0);
3664 addr->u.inet->has_ipv6 = qemu_opt_get(opts, "ipv6");
3665 addr->u.inet->ipv6 = qemu_opt_get_bool(opts, "ipv6", 0);
3666 backend->u.udp->remote = addr;
3667
3668 if (has_local) {
3669 backend->u.udp->has_local = true;
3670 addr = g_new0(SocketAddress, 1);
3671 addr->type = SOCKET_ADDRESS_KIND_INET;
3672 addr->u.inet = g_new0(InetSocketAddress, 1);
3673 addr->u.inet->host = g_strdup(localaddr);
3674 addr->u.inet->port = g_strdup(localport);
3675 backend->u.udp->local = addr;
3676 }
3677 }
3678
3679 typedef struct CharDriver {
3680 const char *name;
3681 ChardevBackendKind kind;
3682 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3683 CharDriverState *(*create)(const char *id, ChardevBackend *backend,
3684 ChardevReturn *ret, Error **errp);
3685 } CharDriver;
3686
3687 static GSList *backends;
3688
3689 void register_char_driver(const char *name, ChardevBackendKind kind,
3690 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp),
3691 CharDriverState *(*create)(const char *id, ChardevBackend *backend,
3692 ChardevReturn *ret, Error **errp))
3693 {
3694 CharDriver *s;
3695
3696 s = g_malloc0(sizeof(*s));
3697 s->name = g_strdup(name);
3698 s->kind = kind;
3699 s->parse = parse;
3700 s->create = create;
3701
3702 backends = g_slist_append(backends, s);
3703 }
3704
3705 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3706 void (*init)(struct CharDriverState *s),
3707 Error **errp)
3708 {
3709 Error *local_err = NULL;
3710 CharDriver *cd;
3711 CharDriverState *chr;
3712 GSList *i;
3713 ChardevReturn *ret = NULL;
3714 ChardevBackend *backend;
3715 const char *id = qemu_opts_id(opts);
3716 char *bid = NULL;
3717
3718 if (id == NULL) {
3719 error_setg(errp, "chardev: no id specified");
3720 goto err;
3721 }
3722
3723 if (qemu_opt_get(opts, "backend") == NULL) {
3724 error_setg(errp, "chardev: \"%s\" missing backend",
3725 qemu_opts_id(opts));
3726 goto err;
3727 }
3728 for (i = backends; i; i = i->next) {
3729 cd = i->data;
3730
3731 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3732 break;
3733 }
3734 }
3735 if (i == NULL) {
3736 error_setg(errp, "chardev: backend \"%s\" not found",
3737 qemu_opt_get(opts, "backend"));
3738 goto err;
3739 }
3740
3741 backend = g_new0(ChardevBackend, 1);
3742
3743 if (qemu_opt_get_bool(opts, "mux", 0)) {
3744 bid = g_strdup_printf("%s-base", id);
3745 }
3746
3747 chr = NULL;
3748 backend->type = cd->kind;
3749 if (cd->parse) {
3750 cd->parse(opts, backend, &local_err);
3751 if (local_err) {
3752 error_propagate(errp, local_err);
3753 goto qapi_out;
3754 }
3755 }
3756 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3757 if (!ret) {
3758 goto qapi_out;
3759 }
3760
3761 if (bid) {
3762 qapi_free_ChardevBackend(backend);
3763 qapi_free_ChardevReturn(ret);
3764 backend = g_new0(ChardevBackend, 1);
3765 backend->u.mux = g_new0(ChardevMux, 1);
3766 backend->type = CHARDEV_BACKEND_KIND_MUX;
3767 backend->u.mux->chardev = g_strdup(bid);
3768 ret = qmp_chardev_add(id, backend, errp);
3769 if (!ret) {
3770 chr = qemu_chr_find(bid);
3771 qemu_chr_delete(chr);
3772 chr = NULL;
3773 goto qapi_out;
3774 }
3775 }
3776
3777 chr = qemu_chr_find(id);
3778 chr->opts = opts;
3779
3780 qapi_out:
3781 qapi_free_ChardevBackend(backend);
3782 qapi_free_ChardevReturn(ret);
3783 g_free(bid);
3784 return chr;
3785
3786 err:
3787 qemu_opts_del(opts);
3788 return NULL;
3789 }
3790
3791 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3792 {
3793 const char *p;
3794 CharDriverState *chr;
3795 QemuOpts *opts;
3796 Error *err = NULL;
3797
3798 if (strstart(filename, "chardev:", &p)) {
3799 return qemu_chr_find(p);
3800 }
3801
3802 opts = qemu_chr_parse_compat(label, filename);
3803 if (!opts)
3804 return NULL;
3805
3806 chr = qemu_chr_new_from_opts(opts, init, &err);
3807 if (err) {
3808 error_report_err(err);
3809 }
3810 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3811 qemu_chr_fe_claim_no_fail(chr);
3812 monitor_init(chr, MONITOR_USE_READLINE);
3813 }
3814 return chr;
3815 }
3816
3817 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3818 {
3819 if (chr->chr_set_echo) {
3820 chr->chr_set_echo(chr, echo);
3821 }
3822 }
3823
3824 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
3825 {
3826 if (chr->fe_open == fe_open) {
3827 return;
3828 }
3829 chr->fe_open = fe_open;
3830 if (chr->chr_set_fe_open) {
3831 chr->chr_set_fe_open(chr, fe_open);
3832 }
3833 }
3834
3835 void qemu_chr_fe_event(struct CharDriverState *chr, int event)
3836 {
3837 if (chr->chr_fe_event) {
3838 chr->chr_fe_event(chr, event);
3839 }
3840 }
3841
3842 int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3843 GIOFunc func, void *user_data)
3844 {
3845 GSource *src;
3846 guint tag;
3847
3848 if (s->chr_add_watch == NULL) {
3849 return -ENOSYS;
3850 }
3851
3852 src = s->chr_add_watch(s, cond);
3853 if (!src) {
3854 return -EINVAL;
3855 }
3856
3857 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3858 tag = g_source_attach(src, NULL);
3859 g_source_unref(src);
3860
3861 return tag;
3862 }
3863
3864 int qemu_chr_fe_claim(CharDriverState *s)
3865 {
3866 if (s->avail_connections < 1) {
3867 return -1;
3868 }
3869 s->avail_connections--;
3870 return 0;
3871 }
3872
3873 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
3874 {
3875 if (qemu_chr_fe_claim(s) != 0) {
3876 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
3877 __func__, s->label);
3878 exit(1);
3879 }
3880 }
3881
3882 void qemu_chr_fe_release(CharDriverState *s)
3883 {
3884 s->avail_connections++;
3885 }
3886
3887 void qemu_chr_free(CharDriverState *chr)
3888 {
3889 if (chr->chr_close) {
3890 chr->chr_close(chr);
3891 }
3892 g_free(chr->filename);
3893 g_free(chr->label);
3894 qemu_opts_del(chr->opts);
3895 g_free(chr);
3896 }
3897
3898 void qemu_chr_delete(CharDriverState *chr)
3899 {
3900 QTAILQ_REMOVE(&chardevs, chr, next);
3901 qemu_chr_free(chr);
3902 }
3903
3904 ChardevInfoList *qmp_query_chardev(Error **errp)
3905 {
3906 ChardevInfoList *chr_list = NULL;
3907 CharDriverState *chr;
3908
3909 QTAILQ_FOREACH(chr, &chardevs, next) {
3910 ChardevInfoList *info = g_malloc0(sizeof(*info));
3911 info->value = g_malloc0(sizeof(*info->value));
3912 info->value->label = g_strdup(chr->label);
3913 info->value->filename = g_strdup(chr->filename);
3914 info->value->frontend_open = chr->fe_open;
3915
3916 info->next = chr_list;
3917 chr_list = info;
3918 }
3919
3920 return chr_list;
3921 }
3922
3923 ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp)
3924 {
3925 ChardevBackendInfoList *backend_list = NULL;
3926 CharDriver *c = NULL;
3927 GSList *i = NULL;
3928
3929 for (i = backends; i; i = i->next) {
3930 ChardevBackendInfoList *info = g_malloc0(sizeof(*info));
3931 c = i->data;
3932 info->value = g_malloc0(sizeof(*info->value));
3933 info->value->name = g_strdup(c->name);
3934
3935 info->next = backend_list;
3936 backend_list = info;
3937 }
3938
3939 return backend_list;
3940 }
3941
3942 CharDriverState *qemu_chr_find(const char *name)
3943 {
3944 CharDriverState *chr;
3945
3946 QTAILQ_FOREACH(chr, &chardevs, next) {
3947 if (strcmp(chr->label, name) != 0)
3948 continue;
3949 return chr;
3950 }
3951 return NULL;
3952 }
3953
3954 /* Get a character (serial) device interface. */
3955 CharDriverState *qemu_char_get_next_serial(void)
3956 {
3957 static int next_serial;
3958 CharDriverState *chr;
3959
3960 /* FIXME: This function needs to go away: use chardev properties! */
3961
3962 while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
3963 chr = serial_hds[next_serial++];
3964 qemu_chr_fe_claim_no_fail(chr);
3965 return chr;
3966 }
3967 return NULL;
3968 }
3969
3970 QemuOptsList qemu_chardev_opts = {
3971 .name = "chardev",
3972 .implied_opt_name = "backend",
3973 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3974 .desc = {
3975 {
3976 .name = "backend",
3977 .type = QEMU_OPT_STRING,
3978 },{
3979 .name = "path",
3980 .type = QEMU_OPT_STRING,
3981 },{
3982 .name = "host",
3983 .type = QEMU_OPT_STRING,
3984 },{
3985 .name = "port",
3986 .type = QEMU_OPT_STRING,
3987 },{
3988 .name = "localaddr",
3989 .type = QEMU_OPT_STRING,
3990 },{
3991 .name = "localport",
3992 .type = QEMU_OPT_STRING,
3993 },{
3994 .name = "to",
3995 .type = QEMU_OPT_NUMBER,
3996 },{
3997 .name = "ipv4",
3998 .type = QEMU_OPT_BOOL,
3999 },{
4000 .name = "ipv6",
4001 .type = QEMU_OPT_BOOL,
4002 },{
4003 .name = "wait",
4004 .type = QEMU_OPT_BOOL,
4005 },{
4006 .name = "server",
4007 .type = QEMU_OPT_BOOL,
4008 },{
4009 .name = "delay",
4010 .type = QEMU_OPT_BOOL,
4011 },{
4012 .name = "reconnect",
4013 .type = QEMU_OPT_NUMBER,
4014 },{
4015 .name = "telnet",
4016 .type = QEMU_OPT_BOOL,
4017 },{
4018 .name = "width",
4019 .type = QEMU_OPT_NUMBER,
4020 },{
4021 .name = "height",
4022 .type = QEMU_OPT_NUMBER,
4023 },{
4024 .name = "cols",
4025 .type = QEMU_OPT_NUMBER,
4026 },{
4027 .name = "rows",
4028 .type = QEMU_OPT_NUMBER,
4029 },{
4030 .name = "mux",
4031 .type = QEMU_OPT_BOOL,
4032 },{
4033 .name = "signal",
4034 .type = QEMU_OPT_BOOL,
4035 },{
4036 .name = "name",
4037 .type = QEMU_OPT_STRING,
4038 },{
4039 .name = "debug",
4040 .type = QEMU_OPT_NUMBER,
4041 },{
4042 .name = "size",
4043 .type = QEMU_OPT_SIZE,
4044 },{
4045 .name = "chardev",
4046 .type = QEMU_OPT_STRING,
4047 },{
4048 .name = "append",
4049 .type = QEMU_OPT_BOOL,
4050 },
4051 { /* end of list */ }
4052 },
4053 };
4054
4055 #ifdef _WIN32
4056
4057 static CharDriverState *qmp_chardev_open_file(const char *id,
4058 ChardevBackend *backend,
4059 ChardevReturn *ret,
4060 Error **errp)
4061 {
4062 ChardevFile *file = backend->u.file;
4063 HANDLE out;
4064
4065 if (file->has_in) {
4066 error_setg(errp, "input file not supported");
4067 return NULL;
4068 }
4069
4070 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
4071 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
4072 if (out == INVALID_HANDLE_VALUE) {
4073 error_setg(errp, "open %s failed", file->out);
4074 return NULL;
4075 }
4076 return qemu_chr_open_win_file(out);
4077 }
4078
4079 static CharDriverState *qmp_chardev_open_serial(const char *id,
4080 ChardevBackend *backend,
4081 ChardevReturn *ret,
4082 Error **errp)
4083 {
4084 ChardevHostdev *serial = backend->u.serial;
4085 return qemu_chr_open_win_path(serial->device, errp);
4086 }
4087
4088 #else /* WIN32 */
4089
4090 static int qmp_chardev_open_file_source(char *src, int flags,
4091 Error **errp)
4092 {
4093 int fd = -1;
4094
4095 TFR(fd = qemu_open(src, flags, 0666));
4096 if (fd == -1) {
4097 error_setg_file_open(errp, errno, src);
4098 }
4099 return fd;
4100 }
4101
4102 static CharDriverState *qmp_chardev_open_file(const char *id,
4103 ChardevBackend *backend,
4104 ChardevReturn *ret,
4105 Error **errp)
4106 {
4107 ChardevFile *file = backend->u.file;
4108 int flags, in = -1, out;
4109
4110 flags = O_WRONLY | O_CREAT | O_BINARY;
4111 if (file->has_append && file->append) {
4112 flags |= O_APPEND;
4113 } else {
4114 flags |= O_TRUNC;
4115 }
4116
4117 out = qmp_chardev_open_file_source(file->out, flags, errp);
4118 if (out < 0) {
4119 return NULL;
4120 }
4121
4122 if (file->has_in) {
4123 flags = O_RDONLY;
4124 in = qmp_chardev_open_file_source(file->in, flags, errp);
4125 if (in < 0) {
4126 qemu_close(out);
4127 return NULL;
4128 }
4129 }
4130
4131 return qemu_chr_open_fd(in, out);
4132 }
4133
4134 #ifdef HAVE_CHARDEV_SERIAL
4135 static CharDriverState *qmp_chardev_open_serial(const char *id,
4136 ChardevBackend *backend,
4137 ChardevReturn *ret,
4138 Error **errp)
4139 {
4140 ChardevHostdev *serial = backend->u.serial;
4141 int fd;
4142
4143 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
4144 if (fd < 0) {
4145 return NULL;
4146 }
4147 qemu_set_nonblock(fd);
4148 return qemu_chr_open_tty_fd(fd);
4149 }
4150 #endif
4151
4152 #ifdef HAVE_CHARDEV_PARPORT
4153 static CharDriverState *qmp_chardev_open_parallel(const char *id,
4154 ChardevBackend *backend,
4155 ChardevReturn *ret,
4156 Error **errp)
4157 {
4158 ChardevHostdev *parallel = backend->u.parallel;
4159 int fd;
4160
4161 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
4162 if (fd < 0) {
4163 return NULL;
4164 }
4165 return qemu_chr_open_pp_fd(fd, errp);
4166 }
4167 #endif
4168
4169 #endif /* WIN32 */
4170
4171 static void socket_try_connect(CharDriverState *chr)
4172 {
4173 Error *err = NULL;
4174
4175 if (!qemu_chr_open_socket_fd(chr, &err)) {
4176 check_report_connect_error(chr, err);
4177 }
4178 }
4179
4180 static gboolean socket_reconnect_timeout(gpointer opaque)
4181 {
4182 CharDriverState *chr = opaque;
4183 TCPCharDriver *s = chr->opaque;
4184
4185 s->reconnect_timer = 0;
4186
4187 if (chr->be_open) {
4188 return false;
4189 }
4190
4191 socket_try_connect(chr);
4192
4193 return false;
4194 }
4195
4196 static CharDriverState *qmp_chardev_open_socket(const char *id,
4197 ChardevBackend *backend,
4198 ChardevReturn *ret,
4199 Error **errp)
4200 {
4201 CharDriverState *chr;
4202 TCPCharDriver *s;
4203 ChardevSocket *sock = backend->u.socket;
4204 SocketAddress *addr = sock->addr;
4205 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
4206 bool is_listen = sock->has_server ? sock->server : true;
4207 bool is_telnet = sock->has_telnet ? sock->telnet : false;
4208 bool is_waitconnect = sock->has_wait ? sock->wait : false;
4209 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0;
4210
4211 chr = qemu_chr_alloc();
4212 s = g_new0(TCPCharDriver, 1);
4213
4214 s->fd = -1;
4215 s->listen_fd = -1;
4216 s->is_unix = addr->type == SOCKET_ADDRESS_KIND_UNIX;
4217 s->is_listen = is_listen;
4218 s->is_telnet = is_telnet;
4219 s->do_nodelay = do_nodelay;
4220 qapi_copy_SocketAddress(&s->addr, sock->addr);
4221
4222 chr->opaque = s;
4223 chr->chr_write = tcp_chr_write;
4224 chr->chr_sync_read = tcp_chr_sync_read;
4225 chr->chr_close = tcp_chr_close;
4226 chr->get_msgfds = tcp_get_msgfds;
4227 chr->set_msgfds = tcp_set_msgfds;
4228 chr->chr_add_client = tcp_chr_add_client;
4229 chr->chr_add_watch = tcp_chr_add_watch;
4230 chr->chr_update_read_handler = tcp_chr_update_read_handler;
4231 /* be isn't opened until we get a connection */
4232 chr->explicit_be_open = true;
4233
4234 chr->filename = g_malloc(CHR_MAX_FILENAME_SIZE);
4235 SocketAddress_to_str(chr->filename, CHR_MAX_FILENAME_SIZE, "disconnected:",
4236 addr, is_listen, is_telnet);
4237
4238 if (is_listen) {
4239 if (is_telnet) {
4240 s->do_telnetopt = 1;
4241 }
4242 } else if (reconnect > 0) {
4243 s->reconnect_time = reconnect;
4244 }
4245
4246 if (s->reconnect_time) {
4247 socket_try_connect(chr);
4248 } else if (!qemu_chr_open_socket_fd(chr, errp)) {
4249 g_free(s);
4250 g_free(chr->filename);
4251 g_free(chr);
4252 return NULL;
4253 }
4254
4255 if (is_listen && is_waitconnect) {
4256 fprintf(stderr, "QEMU waiting for connection on: %s\n",
4257 chr->filename);
4258 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
4259 qemu_set_nonblock(s->listen_fd);
4260 }
4261
4262 return chr;
4263 }
4264
4265 static CharDriverState *qmp_chardev_open_udp(const char *id,
4266 ChardevBackend *backend,
4267 ChardevReturn *ret,
4268 Error **errp)
4269 {
4270 ChardevUdp *udp = backend->u.udp;
4271 int fd;
4272
4273 fd = socket_dgram(udp->remote, udp->local, errp);
4274 if (fd < 0) {
4275 return NULL;
4276 }
4277 return qemu_chr_open_udp_fd(fd);
4278 }
4279
4280 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
4281 Error **errp)
4282 {
4283 ChardevReturn *ret = g_new0(ChardevReturn, 1);
4284 CharDriverState *chr = NULL;
4285 Error *local_err = NULL;
4286 GSList *i;
4287 CharDriver *cd;
4288
4289 chr = qemu_chr_find(id);
4290 if (chr) {
4291 error_setg(errp, "Chardev '%s' already exists", id);
4292 g_free(ret);
4293 return NULL;
4294 }
4295
4296 for (i = backends; i; i = i->next) {
4297 cd = i->data;
4298
4299 if (cd->kind == backend->type) {
4300 chr = cd->create(id, backend, ret, &local_err);
4301 if (local_err) {
4302 error_propagate(errp, local_err);
4303 goto out_error;
4304 }
4305 break;
4306 }
4307 }
4308
4309 if (chr == NULL) {
4310 assert(!i);
4311 error_setg(errp, "chardev backend not available");
4312 goto out_error;
4313 }
4314
4315 chr->label = g_strdup(id);
4316 chr->avail_connections =
4317 (backend->type == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
4318 if (!chr->filename) {
4319 chr->filename = g_strdup(ChardevBackendKind_lookup[backend->type]);
4320 }
4321 if (!chr->explicit_be_open) {
4322 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
4323 }
4324 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
4325 return ret;
4326
4327 out_error:
4328 g_free(ret);
4329 return NULL;
4330 }
4331
4332 void qmp_chardev_remove(const char *id, Error **errp)
4333 {
4334 CharDriverState *chr;
4335
4336 chr = qemu_chr_find(id);
4337 if (chr == NULL) {
4338 error_setg(errp, "Chardev '%s' not found", id);
4339 return;
4340 }
4341 if (chr->chr_can_read || chr->chr_read ||
4342 chr->chr_event || chr->handler_opaque) {
4343 error_setg(errp, "Chardev '%s' is busy", id);
4344 return;
4345 }
4346 qemu_chr_delete(chr);
4347 }
4348
4349 static void register_types(void)
4350 {
4351 register_char_driver("null", CHARDEV_BACKEND_KIND_NULL, NULL,
4352 qemu_chr_open_null);
4353 register_char_driver("socket", CHARDEV_BACKEND_KIND_SOCKET,
4354 qemu_chr_parse_socket, qmp_chardev_open_socket);
4355 register_char_driver("udp", CHARDEV_BACKEND_KIND_UDP, qemu_chr_parse_udp,
4356 qmp_chardev_open_udp);
4357 register_char_driver("ringbuf", CHARDEV_BACKEND_KIND_RINGBUF,
4358 qemu_chr_parse_ringbuf, qemu_chr_open_ringbuf);
4359 register_char_driver("file", CHARDEV_BACKEND_KIND_FILE,
4360 qemu_chr_parse_file_out, qmp_chardev_open_file);
4361 register_char_driver("stdio", CHARDEV_BACKEND_KIND_STDIO,
4362 qemu_chr_parse_stdio, qemu_chr_open_stdio);
4363 #if defined HAVE_CHARDEV_SERIAL
4364 register_char_driver("serial", CHARDEV_BACKEND_KIND_SERIAL,
4365 qemu_chr_parse_serial, qmp_chardev_open_serial);
4366 register_char_driver("tty", CHARDEV_BACKEND_KIND_SERIAL,
4367 qemu_chr_parse_serial, qmp_chardev_open_serial);
4368 #endif
4369 #ifdef HAVE_CHARDEV_PARPORT
4370 register_char_driver("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
4371 qemu_chr_parse_parallel, qmp_chardev_open_parallel);
4372 register_char_driver("parport", CHARDEV_BACKEND_KIND_PARALLEL,
4373 qemu_chr_parse_parallel, qmp_chardev_open_parallel);
4374 #endif
4375 #ifdef HAVE_CHARDEV_PTY
4376 register_char_driver("pty", CHARDEV_BACKEND_KIND_PTY, NULL,
4377 qemu_chr_open_pty);
4378 #endif
4379 #ifdef _WIN32
4380 register_char_driver("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL,
4381 qemu_chr_open_win_con);
4382 #endif
4383 register_char_driver("pipe", CHARDEV_BACKEND_KIND_PIPE,
4384 qemu_chr_parse_pipe, qemu_chr_open_pipe);
4385 register_char_driver("mux", CHARDEV_BACKEND_KIND_MUX, qemu_chr_parse_mux,
4386 qemu_chr_open_mux);
4387 /* Bug-compatibility: */
4388 register_char_driver("memory", CHARDEV_BACKEND_KIND_MEMORY,
4389 qemu_chr_parse_ringbuf, qemu_chr_open_ringbuf);
4390 /* this must be done after machine init, since we register FEs with muxes
4391 * as part of realize functions like serial_isa_realizefn when -nographic
4392 * is specified
4393 */
4394 qemu_add_machine_init_done_notifier(&muxes_realize_notify);
4395 }
4396
4397 type_init(register_types);
QEmu