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blockdev: read-only-mode for blockdev-change-medium
[qemu.git] / qemu-char.c
blob5448b0f30b74d35f4b653d57cf15827735084c11
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
1245 pfd.fd = g_io_channel_unix_get_fd(s->fd);
1246 pfd.events = G_IO_OUT;
1247 pfd.revents = 0;
1248 g_poll(&pfd, 1, 0);
1249 if (pfd.revents & G_IO_HUP) {
1250 pty_chr_state(chr, 0);
1251 } else {
1252 pty_chr_state(chr, 1);
1253 }
1254 }
1255
1256 static void pty_chr_update_read_handler(CharDriverState *chr)
1257 {
1258 qemu_mutex_lock(&chr->chr_write_lock);
1259 pty_chr_update_read_handler_locked(chr);
1260 qemu_mutex_unlock(&chr->chr_write_lock);
1261 }
1262
1263 /* Called with chr_write_lock held. */
1264 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1265 {
1266 PtyCharDriver *s = chr->opaque;
1267
1268 if (!s->connected) {
1269 /* guest sends data, check for (re-)connect */
1270 pty_chr_update_read_handler_locked(chr);
1271 if (!s->connected) {
1272 return 0;
1273 }
1274 }
1275 return io_channel_send(s->fd, buf, len);
1276 }
1277
1278 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1279 {
1280 PtyCharDriver *s = chr->opaque;
1281 if (!s->connected) {
1282 return NULL;
1283 }
1284 return g_io_create_watch(s->fd, cond);
1285 }
1286
1287 static int pty_chr_read_poll(void *opaque)
1288 {
1289 CharDriverState *chr = opaque;
1290 PtyCharDriver *s = chr->opaque;
1291
1292 s->read_bytes = qemu_chr_be_can_write(chr);
1293 return s->read_bytes;
1294 }
1295
1296 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1297 {
1298 CharDriverState *chr = opaque;
1299 PtyCharDriver *s = chr->opaque;
1300 gsize size, len;
1301 uint8_t buf[READ_BUF_LEN];
1302 GIOStatus status;
1303
1304 len = sizeof(buf);
1305 if (len > s->read_bytes)
1306 len = s->read_bytes;
1307 if (len == 0) {
1308 return TRUE;
1309 }
1310 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1311 if (status != G_IO_STATUS_NORMAL) {
1312 pty_chr_state(chr, 0);
1313 return FALSE;
1314 } else {
1315 pty_chr_state(chr, 1);
1316 qemu_chr_be_write(chr, buf, size);
1317 }
1318 return TRUE;
1319 }
1320
1321 static gboolean qemu_chr_be_generic_open_func(gpointer opaque)
1322 {
1323 CharDriverState *chr = opaque;
1324 PtyCharDriver *s = chr->opaque;
1325
1326 s->open_tag = 0;
1327 qemu_chr_be_generic_open(chr);
1328 return FALSE;
1329 }
1330
1331 /* Called with chr_write_lock held. */
1332 static void pty_chr_state(CharDriverState *chr, int connected)
1333 {
1334 PtyCharDriver *s = chr->opaque;
1335
1336 if (!connected) {
1337 if (s->open_tag) {
1338 g_source_remove(s->open_tag);
1339 s->open_tag = 0;
1340 }
1341 remove_fd_in_watch(chr);
1342 s->connected = 0;
1343 /* (re-)connect poll interval for idle guests: once per second.
1344 * We check more frequently in case the guests sends data to
1345 * the virtual device linked to our pty. */
1346 pty_chr_rearm_timer(chr, 1000);
1347 } else {
1348 if (s->timer_tag) {
1349 g_source_remove(s->timer_tag);
1350 s->timer_tag = 0;
1351 }
1352 if (!s->connected) {
1353 g_assert(s->open_tag == 0);
1354 s->connected = 1;
1355 s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, chr);
1356 }
1357 if (!chr->fd_in_tag) {
1358 chr->fd_in_tag = io_add_watch_poll(s->fd, pty_chr_read_poll,
1359 pty_chr_read, chr);
1360 }
1361 }
1362 }
1363
1364 static void pty_chr_close(struct CharDriverState *chr)
1365 {
1366 PtyCharDriver *s = chr->opaque;
1367 int fd;
1368
1369 qemu_mutex_lock(&chr->chr_write_lock);
1370 pty_chr_state(chr, 0);
1371 fd = g_io_channel_unix_get_fd(s->fd);
1372 g_io_channel_unref(s->fd);
1373 close(fd);
1374 if (s->timer_tag) {
1375 g_source_remove(s->timer_tag);
1376 s->timer_tag = 0;
1377 }
1378 qemu_mutex_unlock(&chr->chr_write_lock);
1379 g_free(s);
1380 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1381 }
1382
1383 static CharDriverState *qemu_chr_open_pty(const char *id,
1384 ChardevBackend *backend,
1385 ChardevReturn *ret,
1386 Error **errp)
1387 {
1388 CharDriverState *chr;
1389 PtyCharDriver *s;
1390 int master_fd, slave_fd;
1391 char pty_name[PATH_MAX];
1392
1393 master_fd = qemu_openpty_raw(&slave_fd, pty_name);
1394 if (master_fd < 0) {
1395 error_setg_errno(errp, errno, "Failed to create PTY");
1396 return NULL;
1397 }
1398
1399 close(slave_fd);
1400 qemu_set_nonblock(master_fd);
1401
1402 chr = qemu_chr_alloc();
1403
1404 chr->filename = g_strdup_printf("pty:%s", pty_name);
1405 ret->pty = g_strdup(pty_name);
1406 ret->has_pty = true;
1407
1408 fprintf(stderr, "char device redirected to %s (label %s)\n",
1409 pty_name, id);
1410
1411 s = g_new0(PtyCharDriver, 1);
1412 chr->opaque = s;
1413 chr->chr_write = pty_chr_write;
1414 chr->chr_update_read_handler = pty_chr_update_read_handler;
1415 chr->chr_close = pty_chr_close;
1416 chr->chr_add_watch = pty_chr_add_watch;
1417 chr->explicit_be_open = true;
1418
1419 s->fd = io_channel_from_fd(master_fd);
1420 s->timer_tag = 0;
1421
1422 return chr;
1423 }
1424
1425 static void tty_serial_init(int fd, int speed,
1426 int parity, int data_bits, int stop_bits)
1427 {
1428 struct termios tty;
1429 speed_t spd;
1430
1431 #if 0
1432 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1433 speed, parity, data_bits, stop_bits);
1434 #endif
1435 tcgetattr (fd, &tty);
1436
1437 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1438 speed = speed * 10 / 11;
1439 do {
1440 check_speed(50);
1441 check_speed(75);
1442 check_speed(110);
1443 check_speed(134);
1444 check_speed(150);
1445 check_speed(200);
1446 check_speed(300);
1447 check_speed(600);
1448 check_speed(1200);
1449 check_speed(1800);
1450 check_speed(2400);
1451 check_speed(4800);
1452 check_speed(9600);
1453 check_speed(19200);
1454 check_speed(38400);
1455 /* Non-Posix values follow. They may be unsupported on some systems. */
1456 check_speed(57600);
1457 check_speed(115200);
1458 #ifdef B230400
1459 check_speed(230400);
1460 #endif
1461 #ifdef B460800
1462 check_speed(460800);
1463 #endif
1464 #ifdef B500000
1465 check_speed(500000);
1466 #endif
1467 #ifdef B576000
1468 check_speed(576000);
1469 #endif
1470 #ifdef B921600
1471 check_speed(921600);
1472 #endif
1473 #ifdef B1000000
1474 check_speed(1000000);
1475 #endif
1476 #ifdef B1152000
1477 check_speed(1152000);
1478 #endif
1479 #ifdef B1500000
1480 check_speed(1500000);
1481 #endif
1482 #ifdef B2000000
1483 check_speed(2000000);
1484 #endif
1485 #ifdef B2500000
1486 check_speed(2500000);
1487 #endif
1488 #ifdef B3000000
1489 check_speed(3000000);
1490 #endif
1491 #ifdef B3500000
1492 check_speed(3500000);
1493 #endif
1494 #ifdef B4000000
1495 check_speed(4000000);
1496 #endif
1497 spd = B115200;
1498 } while (0);
1499
1500 cfsetispeed(&tty, spd);
1501 cfsetospeed(&tty, spd);
1502
1503 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1504 |INLCR|IGNCR|ICRNL|IXON);
1505 tty.c_oflag |= OPOST;
1506 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1507 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1508 switch(data_bits) {
1509 default:
1510 case 8:
1511 tty.c_cflag |= CS8;
1512 break;
1513 case 7:
1514 tty.c_cflag |= CS7;
1515 break;
1516 case 6:
1517 tty.c_cflag |= CS6;
1518 break;
1519 case 5:
1520 tty.c_cflag |= CS5;
1521 break;
1522 }
1523 switch(parity) {
1524 default:
1525 case 'N':
1526 break;
1527 case 'E':
1528 tty.c_cflag |= PARENB;
1529 break;
1530 case 'O':
1531 tty.c_cflag |= PARENB | PARODD;
1532 break;
1533 }
1534 if (stop_bits == 2)
1535 tty.c_cflag |= CSTOPB;
1536
1537 tcsetattr (fd, TCSANOW, &tty);
1538 }
1539
1540 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1541 {
1542 FDCharDriver *s = chr->opaque;
1543
1544 switch(cmd) {
1545 case CHR_IOCTL_SERIAL_SET_PARAMS:
1546 {
1547 QEMUSerialSetParams *ssp = arg;
1548 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1549 ssp->speed, ssp->parity,
1550 ssp->data_bits, ssp->stop_bits);
1551 }
1552 break;
1553 case CHR_IOCTL_SERIAL_SET_BREAK:
1554 {
1555 int enable = *(int *)arg;
1556 if (enable) {
1557 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1558 }
1559 }
1560 break;
1561 case CHR_IOCTL_SERIAL_GET_TIOCM:
1562 {
1563 int sarg = 0;
1564 int *targ = (int *)arg;
1565 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1566 *targ = 0;
1567 if (sarg & TIOCM_CTS)
1568 *targ |= CHR_TIOCM_CTS;
1569 if (sarg & TIOCM_CAR)
1570 *targ |= CHR_TIOCM_CAR;
1571 if (sarg & TIOCM_DSR)
1572 *targ |= CHR_TIOCM_DSR;
1573 if (sarg & TIOCM_RI)
1574 *targ |= CHR_TIOCM_RI;
1575 if (sarg & TIOCM_DTR)
1576 *targ |= CHR_TIOCM_DTR;
1577 if (sarg & TIOCM_RTS)
1578 *targ |= CHR_TIOCM_RTS;
1579 }
1580 break;
1581 case CHR_IOCTL_SERIAL_SET_TIOCM:
1582 {
1583 int sarg = *(int *)arg;
1584 int targ = 0;
1585 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1586 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1587 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1588 if (sarg & CHR_TIOCM_CTS)
1589 targ |= TIOCM_CTS;
1590 if (sarg & CHR_TIOCM_CAR)
1591 targ |= TIOCM_CAR;
1592 if (sarg & CHR_TIOCM_DSR)
1593 targ |= TIOCM_DSR;
1594 if (sarg & CHR_TIOCM_RI)
1595 targ |= TIOCM_RI;
1596 if (sarg & CHR_TIOCM_DTR)
1597 targ |= TIOCM_DTR;
1598 if (sarg & CHR_TIOCM_RTS)
1599 targ |= TIOCM_RTS;
1600 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1601 }
1602 break;
1603 default:
1604 return -ENOTSUP;
1605 }
1606 return 0;
1607 }
1608
1609 static void qemu_chr_close_tty(CharDriverState *chr)
1610 {
1611 FDCharDriver *s = chr->opaque;
1612 int fd = -1;
1613
1614 if (s) {
1615 fd = g_io_channel_unix_get_fd(s->fd_in);
1616 }
1617
1618 fd_chr_close(chr);
1619
1620 if (fd >= 0) {
1621 close(fd);
1622 }
1623 }
1624
1625 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1626 {
1627 CharDriverState *chr;
1628
1629 tty_serial_init(fd, 115200, 'N', 8, 1);
1630 chr = qemu_chr_open_fd(fd, fd);
1631 chr->chr_ioctl = tty_serial_ioctl;
1632 chr->chr_close = qemu_chr_close_tty;
1633 return chr;
1634 }
1635 #endif /* __linux__ || __sun__ */
1636
1637 #if defined(__linux__)
1638
1639 #define HAVE_CHARDEV_PARPORT 1
1640
1641 typedef struct {
1642 int fd;
1643 int mode;
1644 } ParallelCharDriver;
1645
1646 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1647 {
1648 if (s->mode != mode) {
1649 int m = mode;
1650 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1651 return 0;
1652 s->mode = mode;
1653 }
1654 return 1;
1655 }
1656
1657 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1658 {
1659 ParallelCharDriver *drv = chr->opaque;
1660 int fd = drv->fd;
1661 uint8_t b;
1662
1663 switch(cmd) {
1664 case CHR_IOCTL_PP_READ_DATA:
1665 if (ioctl(fd, PPRDATA, &b) < 0)
1666 return -ENOTSUP;
1667 *(uint8_t *)arg = b;
1668 break;
1669 case CHR_IOCTL_PP_WRITE_DATA:
1670 b = *(uint8_t *)arg;
1671 if (ioctl(fd, PPWDATA, &b) < 0)
1672 return -ENOTSUP;
1673 break;
1674 case CHR_IOCTL_PP_READ_CONTROL:
1675 if (ioctl(fd, PPRCONTROL, &b) < 0)
1676 return -ENOTSUP;
1677 /* Linux gives only the lowest bits, and no way to know data
1678 direction! For better compatibility set the fixed upper
1679 bits. */
1680 *(uint8_t *)arg = b | 0xc0;
1681 break;
1682 case CHR_IOCTL_PP_WRITE_CONTROL:
1683 b = *(uint8_t *)arg;
1684 if (ioctl(fd, PPWCONTROL, &b) < 0)
1685 return -ENOTSUP;
1686 break;
1687 case CHR_IOCTL_PP_READ_STATUS:
1688 if (ioctl(fd, PPRSTATUS, &b) < 0)
1689 return -ENOTSUP;
1690 *(uint8_t *)arg = b;
1691 break;
1692 case CHR_IOCTL_PP_DATA_DIR:
1693 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1694 return -ENOTSUP;
1695 break;
1696 case CHR_IOCTL_PP_EPP_READ_ADDR:
1697 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1698 struct ParallelIOArg *parg = arg;
1699 int n = read(fd, parg->buffer, parg->count);
1700 if (n != parg->count) {
1701 return -EIO;
1702 }
1703 }
1704 break;
1705 case CHR_IOCTL_PP_EPP_READ:
1706 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1707 struct ParallelIOArg *parg = arg;
1708 int n = read(fd, parg->buffer, parg->count);
1709 if (n != parg->count) {
1710 return -EIO;
1711 }
1712 }
1713 break;
1714 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1715 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1716 struct ParallelIOArg *parg = arg;
1717 int n = write(fd, parg->buffer, parg->count);
1718 if (n != parg->count) {
1719 return -EIO;
1720 }
1721 }
1722 break;
1723 case CHR_IOCTL_PP_EPP_WRITE:
1724 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1725 struct ParallelIOArg *parg = arg;
1726 int n = write(fd, parg->buffer, parg->count);
1727 if (n != parg->count) {
1728 return -EIO;
1729 }
1730 }
1731 break;
1732 default:
1733 return -ENOTSUP;
1734 }
1735 return 0;
1736 }
1737
1738 static void pp_close(CharDriverState *chr)
1739 {
1740 ParallelCharDriver *drv = chr->opaque;
1741 int fd = drv->fd;
1742
1743 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1744 ioctl(fd, PPRELEASE);
1745 close(fd);
1746 g_free(drv);
1747 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1748 }
1749
1750 static CharDriverState *qemu_chr_open_pp_fd(int fd, Error **errp)
1751 {
1752 CharDriverState *chr;
1753 ParallelCharDriver *drv;
1754
1755 if (ioctl(fd, PPCLAIM) < 0) {
1756 error_setg_errno(errp, errno, "not a parallel port");
1757 close(fd);
1758 return NULL;
1759 }
1760
1761 drv = g_new0(ParallelCharDriver, 1);
1762 drv->fd = fd;
1763 drv->mode = IEEE1284_MODE_COMPAT;
1764
1765 chr = qemu_chr_alloc();
1766 chr->chr_write = null_chr_write;
1767 chr->chr_ioctl = pp_ioctl;
1768 chr->chr_close = pp_close;
1769 chr->opaque = drv;
1770
1771 return chr;
1772 }
1773 #endif /* __linux__ */
1774
1775 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1776
1777 #define HAVE_CHARDEV_PARPORT 1
1778
1779 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1780 {
1781 int fd = (int)(intptr_t)chr->opaque;
1782 uint8_t b;
1783
1784 switch(cmd) {
1785 case CHR_IOCTL_PP_READ_DATA:
1786 if (ioctl(fd, PPIGDATA, &b) < 0)
1787 return -ENOTSUP;
1788 *(uint8_t *)arg = b;
1789 break;
1790 case CHR_IOCTL_PP_WRITE_DATA:
1791 b = *(uint8_t *)arg;
1792 if (ioctl(fd, PPISDATA, &b) < 0)
1793 return -ENOTSUP;
1794 break;
1795 case CHR_IOCTL_PP_READ_CONTROL:
1796 if (ioctl(fd, PPIGCTRL, &b) < 0)
1797 return -ENOTSUP;
1798 *(uint8_t *)arg = b;
1799 break;
1800 case CHR_IOCTL_PP_WRITE_CONTROL:
1801 b = *(uint8_t *)arg;
1802 if (ioctl(fd, PPISCTRL, &b) < 0)
1803 return -ENOTSUP;
1804 break;
1805 case CHR_IOCTL_PP_READ_STATUS:
1806 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1807 return -ENOTSUP;
1808 *(uint8_t *)arg = b;
1809 break;
1810 default:
1811 return -ENOTSUP;
1812 }
1813 return 0;
1814 }
1815
1816 static CharDriverState *qemu_chr_open_pp_fd(int fd, Error **errp)
1817 {
1818 CharDriverState *chr;
1819
1820 chr = qemu_chr_alloc();
1821 chr->opaque = (void *)(intptr_t)fd;
1822 chr->chr_write = null_chr_write;
1823 chr->chr_ioctl = pp_ioctl;
1824 chr->explicit_be_open = true;
1825 return chr;
1826 }
1827 #endif
1828
1829 #else /* _WIN32 */
1830
1831 #define HAVE_CHARDEV_SERIAL 1
1832
1833 typedef struct {
1834 int max_size;
1835 HANDLE hcom, hrecv, hsend;
1836 OVERLAPPED orecv;
1837 BOOL fpipe;
1838 DWORD len;
1839
1840 /* Protected by the CharDriverState chr_write_lock. */
1841 OVERLAPPED osend;
1842 } WinCharState;
1843
1844 typedef struct {
1845 HANDLE hStdIn;
1846 HANDLE hInputReadyEvent;
1847 HANDLE hInputDoneEvent;
1848 HANDLE hInputThread;
1849 uint8_t win_stdio_buf;
1850 } WinStdioCharState;
1851
1852 #define NSENDBUF 2048
1853 #define NRECVBUF 2048
1854 #define MAXCONNECT 1
1855 #define NTIMEOUT 5000
1856
1857 static int win_chr_poll(void *opaque);
1858 static int win_chr_pipe_poll(void *opaque);
1859
1860 static void win_chr_close(CharDriverState *chr)
1861 {
1862 WinCharState *s = chr->opaque;
1863
1864 if (s->hsend) {
1865 CloseHandle(s->hsend);
1866 s->hsend = NULL;
1867 }
1868 if (s->hrecv) {
1869 CloseHandle(s->hrecv);
1870 s->hrecv = NULL;
1871 }
1872 if (s->hcom) {
1873 CloseHandle(s->hcom);
1874 s->hcom = NULL;
1875 }
1876 if (s->fpipe)
1877 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1878 else
1879 qemu_del_polling_cb(win_chr_poll, chr);
1880
1881 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1882 }
1883
1884 static int win_chr_init(CharDriverState *chr, const char *filename, Error **errp)
1885 {
1886 WinCharState *s = chr->opaque;
1887 COMMCONFIG comcfg;
1888 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1889 COMSTAT comstat;
1890 DWORD size;
1891 DWORD err;
1892
1893 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1894 if (!s->hsend) {
1895 error_setg(errp, "Failed CreateEvent");
1896 goto fail;
1897 }
1898 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1899 if (!s->hrecv) {
1900 error_setg(errp, "Failed CreateEvent");
1901 goto fail;
1902 }
1903
1904 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1905 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1906 if (s->hcom == INVALID_HANDLE_VALUE) {
1907 error_setg(errp, "Failed CreateFile (%lu)", GetLastError());
1908 s->hcom = NULL;
1909 goto fail;
1910 }
1911
1912 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1913 error_setg(errp, "Failed SetupComm");
1914 goto fail;
1915 }
1916
1917 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1918 size = sizeof(COMMCONFIG);
1919 GetDefaultCommConfig(filename, &comcfg, &size);
1920 comcfg.dcb.DCBlength = sizeof(DCB);
1921 CommConfigDialog(filename, NULL, &comcfg);
1922
1923 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1924 error_setg(errp, "Failed SetCommState");
1925 goto fail;
1926 }
1927
1928 if (!SetCommMask(s->hcom, EV_ERR)) {
1929 error_setg(errp, "Failed SetCommMask");
1930 goto fail;
1931 }
1932
1933 cto.ReadIntervalTimeout = MAXDWORD;
1934 if (!SetCommTimeouts(s->hcom, &cto)) {
1935 error_setg(errp, "Failed SetCommTimeouts");
1936 goto fail;
1937 }
1938
1939 if (!ClearCommError(s->hcom, &err, &comstat)) {
1940 error_setg(errp, "Failed ClearCommError");
1941 goto fail;
1942 }
1943 qemu_add_polling_cb(win_chr_poll, chr);
1944 return 0;
1945
1946 fail:
1947 win_chr_close(chr);
1948 return -1;
1949 }
1950
1951 /* Called with chr_write_lock held. */
1952 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1953 {
1954 WinCharState *s = chr->opaque;
1955 DWORD len, ret, size, err;
1956
1957 len = len1;
1958 ZeroMemory(&s->osend, sizeof(s->osend));
1959 s->osend.hEvent = s->hsend;
1960 while (len > 0) {
1961 if (s->hsend)
1962 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1963 else
1964 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1965 if (!ret) {
1966 err = GetLastError();
1967 if (err == ERROR_IO_PENDING) {
1968 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1969 if (ret) {
1970 buf += size;
1971 len -= size;
1972 } else {
1973 break;
1974 }
1975 } else {
1976 break;
1977 }
1978 } else {
1979 buf += size;
1980 len -= size;
1981 }
1982 }
1983 return len1 - len;
1984 }
1985
1986 static int win_chr_read_poll(CharDriverState *chr)
1987 {
1988 WinCharState *s = chr->opaque;
1989
1990 s->max_size = qemu_chr_be_can_write(chr);
1991 return s->max_size;
1992 }
1993
1994 static void win_chr_readfile(CharDriverState *chr)
1995 {
1996 WinCharState *s = chr->opaque;
1997 int ret, err;
1998 uint8_t buf[READ_BUF_LEN];
1999 DWORD size;
2000
2001 ZeroMemory(&s->orecv, sizeof(s->orecv));
2002 s->orecv.hEvent = s->hrecv;
2003 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
2004 if (!ret) {
2005 err = GetLastError();
2006 if (err == ERROR_IO_PENDING) {
2007 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
2008 }
2009 }
2010
2011 if (size > 0) {
2012 qemu_chr_be_write(chr, buf, size);
2013 }
2014 }
2015
2016 static void win_chr_read(CharDriverState *chr)
2017 {
2018 WinCharState *s = chr->opaque;
2019
2020 if (s->len > s->max_size)
2021 s->len = s->max_size;
2022 if (s->len == 0)
2023 return;
2024
2025 win_chr_readfile(chr);
2026 }
2027
2028 static int win_chr_poll(void *opaque)
2029 {
2030 CharDriverState *chr = opaque;
2031 WinCharState *s = chr->opaque;
2032 COMSTAT status;
2033 DWORD comerr;
2034
2035 ClearCommError(s->hcom, &comerr, &status);
2036 if (status.cbInQue > 0) {
2037 s->len = status.cbInQue;
2038 win_chr_read_poll(chr);
2039 win_chr_read(chr);
2040 return 1;
2041 }
2042 return 0;
2043 }
2044
2045 static CharDriverState *qemu_chr_open_win_path(const char *filename,
2046 Error **errp)
2047 {
2048 CharDriverState *chr;
2049 WinCharState *s;
2050
2051 chr = qemu_chr_alloc();
2052 s = g_new0(WinCharState, 1);
2053 chr->opaque = s;
2054 chr->chr_write = win_chr_write;
2055 chr->chr_close = win_chr_close;
2056
2057 if (win_chr_init(chr, filename, errp) < 0) {
2058 g_free(s);
2059 g_free(chr);
2060 return NULL;
2061 }
2062 return chr;
2063 }
2064
2065 static int win_chr_pipe_poll(void *opaque)
2066 {
2067 CharDriverState *chr = opaque;
2068 WinCharState *s = chr->opaque;
2069 DWORD size;
2070
2071 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
2072 if (size > 0) {
2073 s->len = size;
2074 win_chr_read_poll(chr);
2075 win_chr_read(chr);
2076 return 1;
2077 }
2078 return 0;
2079 }
2080
2081 static int win_chr_pipe_init(CharDriverState *chr, const char *filename,
2082 Error **errp)
2083 {
2084 WinCharState *s = chr->opaque;
2085 OVERLAPPED ov;
2086 int ret;
2087 DWORD size;
2088 char openname[CHR_MAX_FILENAME_SIZE];
2089
2090 s->fpipe = TRUE;
2091
2092 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
2093 if (!s->hsend) {
2094 error_setg(errp, "Failed CreateEvent");
2095 goto fail;
2096 }
2097 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
2098 if (!s->hrecv) {
2099 error_setg(errp, "Failed CreateEvent");
2100 goto fail;
2101 }
2102
2103 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
2104 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
2105 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
2106 PIPE_WAIT,
2107 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
2108 if (s->hcom == INVALID_HANDLE_VALUE) {
2109 error_setg(errp, "Failed CreateNamedPipe (%lu)", GetLastError());
2110 s->hcom = NULL;
2111 goto fail;
2112 }
2113
2114 ZeroMemory(&ov, sizeof(ov));
2115 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
2116 ret = ConnectNamedPipe(s->hcom, &ov);
2117 if (ret) {
2118 error_setg(errp, "Failed ConnectNamedPipe");
2119 goto fail;
2120 }
2121
2122 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
2123 if (!ret) {
2124 error_setg(errp, "Failed GetOverlappedResult");
2125 if (ov.hEvent) {
2126 CloseHandle(ov.hEvent);
2127 ov.hEvent = NULL;
2128 }
2129 goto fail;
2130 }
2131
2132 if (ov.hEvent) {
2133 CloseHandle(ov.hEvent);
2134 ov.hEvent = NULL;
2135 }
2136 qemu_add_polling_cb(win_chr_pipe_poll, chr);
2137 return 0;
2138
2139 fail:
2140 win_chr_close(chr);
2141 return -1;
2142 }
2143
2144
2145 static CharDriverState *qemu_chr_open_pipe(const char *id,
2146 ChardevBackend *backend,
2147 ChardevReturn *ret,
2148 Error **errp)
2149 {
2150 ChardevHostdev *opts = backend->u.pipe;
2151 const char *filename = opts->device;
2152 CharDriverState *chr;
2153 WinCharState *s;
2154
2155 chr = qemu_chr_alloc();
2156 s = g_new0(WinCharState, 1);
2157 chr->opaque = s;
2158 chr->chr_write = win_chr_write;
2159 chr->chr_close = win_chr_close;
2160
2161 if (win_chr_pipe_init(chr, filename, errp) < 0) {
2162 g_free(s);
2163 g_free(chr);
2164 return NULL;
2165 }
2166 return chr;
2167 }
2168
2169 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
2170 {
2171 CharDriverState *chr;
2172 WinCharState *s;
2173
2174 chr = qemu_chr_alloc();
2175 s = g_new0(WinCharState, 1);
2176 s->hcom = fd_out;
2177 chr->opaque = s;
2178 chr->chr_write = win_chr_write;
2179 return chr;
2180 }
2181
2182 static CharDriverState *qemu_chr_open_win_con(const char *id,
2183 ChardevBackend *backend,
2184 ChardevReturn *ret,
2185 Error **errp)
2186 {
2187 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
2188 }
2189
2190 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
2191 {
2192 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
2193 DWORD dwSize;
2194 int len1;
2195
2196 len1 = len;
2197
2198 while (len1 > 0) {
2199 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
2200 break;
2201 }
2202 buf += dwSize;
2203 len1 -= dwSize;
2204 }
2205
2206 return len - len1;
2207 }
2208
2209 static void win_stdio_wait_func(void *opaque)
2210 {
2211 CharDriverState *chr = opaque;
2212 WinStdioCharState *stdio = chr->opaque;
2213 INPUT_RECORD buf[4];
2214 int ret;
2215 DWORD dwSize;
2216 int i;
2217
2218 ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize);
2219
2220 if (!ret) {
2221 /* Avoid error storm */
2222 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2223 return;
2224 }
2225
2226 for (i = 0; i < dwSize; i++) {
2227 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2228
2229 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2230 int j;
2231 if (kev->uChar.AsciiChar != 0) {
2232 for (j = 0; j < kev->wRepeatCount; j++) {
2233 if (qemu_chr_be_can_write(chr)) {
2234 uint8_t c = kev->uChar.AsciiChar;
2235 qemu_chr_be_write(chr, &c, 1);
2236 }
2237 }
2238 }
2239 }
2240 }
2241 }
2242
2243 static DWORD WINAPI win_stdio_thread(LPVOID param)
2244 {
2245 CharDriverState *chr = param;
2246 WinStdioCharState *stdio = chr->opaque;
2247 int ret;
2248 DWORD dwSize;
2249
2250 while (1) {
2251
2252 /* Wait for one byte */
2253 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2254
2255 /* Exit in case of error, continue if nothing read */
2256 if (!ret) {
2257 break;
2258 }
2259 if (!dwSize) {
2260 continue;
2261 }
2262
2263 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2264 if (stdio->win_stdio_buf == '\r') {
2265 continue;
2266 }
2267
2268 /* Signal the main thread and wait until the byte was eaten */
2269 if (!SetEvent(stdio->hInputReadyEvent)) {
2270 break;
2271 }
2272 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2273 != WAIT_OBJECT_0) {
2274 break;
2275 }
2276 }
2277
2278 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2279 return 0;
2280 }
2281
2282 static void win_stdio_thread_wait_func(void *opaque)
2283 {
2284 CharDriverState *chr = opaque;
2285 WinStdioCharState *stdio = chr->opaque;
2286
2287 if (qemu_chr_be_can_write(chr)) {
2288 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2289 }
2290
2291 SetEvent(stdio->hInputDoneEvent);
2292 }
2293
2294 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2295 {
2296 WinStdioCharState *stdio = chr->opaque;
2297 DWORD dwMode = 0;
2298
2299 GetConsoleMode(stdio->hStdIn, &dwMode);
2300
2301 if (echo) {
2302 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2303 } else {
2304 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2305 }
2306 }
2307
2308 static void win_stdio_close(CharDriverState *chr)
2309 {
2310 WinStdioCharState *stdio = chr->opaque;
2311
2312 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2313 CloseHandle(stdio->hInputReadyEvent);
2314 }
2315 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2316 CloseHandle(stdio->hInputDoneEvent);
2317 }
2318 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2319 TerminateThread(stdio->hInputThread, 0);
2320 }
2321
2322 g_free(chr->opaque);
2323 g_free(chr);
2324 }
2325
2326 static CharDriverState *qemu_chr_open_stdio(const char *id,
2327 ChardevBackend *backend,
2328 ChardevReturn *ret,
2329 Error **errp)
2330 {
2331 CharDriverState *chr;
2332 WinStdioCharState *stdio;
2333 DWORD dwMode;
2334 int is_console = 0;
2335
2336 chr = qemu_chr_alloc();
2337 stdio = g_new0(WinStdioCharState, 1);
2338
2339 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2340 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2341 error_setg(errp, "cannot open stdio: invalid handle");
2342 return NULL;
2343 }
2344
2345 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2346
2347 chr->opaque = stdio;
2348 chr->chr_write = win_stdio_write;
2349 chr->chr_close = win_stdio_close;
2350
2351 if (is_console) {
2352 if (qemu_add_wait_object(stdio->hStdIn,
2353 win_stdio_wait_func, chr)) {
2354 error_setg(errp, "qemu_add_wait_object: failed");
2355 goto err1;
2356 }
2357 } else {
2358 DWORD dwId;
2359
2360 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2361 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2362 if (stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2363 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2364 error_setg(errp, "cannot create event");
2365 goto err2;
2366 }
2367 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2368 win_stdio_thread_wait_func, chr)) {
2369 error_setg(errp, "qemu_add_wait_object: failed");
2370 goto err2;
2371 }
2372 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2373 chr, 0, &dwId);
2374
2375 if (stdio->hInputThread == INVALID_HANDLE_VALUE) {
2376 error_setg(errp, "cannot create stdio thread");
2377 goto err3;
2378 }
2379 }
2380
2381 dwMode |= ENABLE_LINE_INPUT;
2382
2383 if (is_console) {
2384 /* set the terminal in raw mode */
2385 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2386 dwMode |= ENABLE_PROCESSED_INPUT;
2387 }
2388
2389 SetConsoleMode(stdio->hStdIn, dwMode);
2390
2391 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2392 qemu_chr_fe_set_echo(chr, false);
2393
2394 return chr;
2395
2396 err3:
2397 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2398 err2:
2399 CloseHandle(stdio->hInputReadyEvent);
2400 CloseHandle(stdio->hInputDoneEvent);
2401 err1:
2402 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2403 return NULL;
2404 }
2405 #endif /* !_WIN32 */
2406
2407
2408 /***********************************************************/
2409 /* UDP Net console */
2410
2411 typedef struct {
2412 int fd;
2413 GIOChannel *chan;
2414 uint8_t buf[READ_BUF_LEN];
2415 int bufcnt;
2416 int bufptr;
2417 int max_size;
2418 } NetCharDriver;
2419
2420 /* Called with chr_write_lock held. */
2421 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2422 {
2423 NetCharDriver *s = chr->opaque;
2424 gsize bytes_written;
2425 GIOStatus status;
2426
2427 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2428 if (status == G_IO_STATUS_EOF) {
2429 return 0;
2430 } else if (status != G_IO_STATUS_NORMAL) {
2431 return -1;
2432 }
2433
2434 return bytes_written;
2435 }
2436
2437 static int udp_chr_read_poll(void *opaque)
2438 {
2439 CharDriverState *chr = opaque;
2440 NetCharDriver *s = chr->opaque;
2441
2442 s->max_size = qemu_chr_be_can_write(chr);
2443
2444 /* If there were any stray characters in the queue process them
2445 * first
2446 */
2447 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2448 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2449 s->bufptr++;
2450 s->max_size = qemu_chr_be_can_write(chr);
2451 }
2452 return s->max_size;
2453 }
2454
2455 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2456 {
2457 CharDriverState *chr = opaque;
2458 NetCharDriver *s = chr->opaque;
2459 gsize bytes_read = 0;
2460 GIOStatus status;
2461
2462 if (s->max_size == 0) {
2463 return TRUE;
2464 }
2465 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2466 &bytes_read, NULL);
2467 s->bufcnt = bytes_read;
2468 s->bufptr = s->bufcnt;
2469 if (status != G_IO_STATUS_NORMAL) {
2470 remove_fd_in_watch(chr);
2471 return FALSE;
2472 }
2473
2474 s->bufptr = 0;
2475 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2476 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2477 s->bufptr++;
2478 s->max_size = qemu_chr_be_can_write(chr);
2479 }
2480
2481 return TRUE;
2482 }
2483
2484 static void udp_chr_update_read_handler(CharDriverState *chr)
2485 {
2486 NetCharDriver *s = chr->opaque;
2487
2488 remove_fd_in_watch(chr);
2489 if (s->chan) {
2490 chr->fd_in_tag = io_add_watch_poll(s->chan, udp_chr_read_poll,
2491 udp_chr_read, chr);
2492 }
2493 }
2494
2495 static void udp_chr_close(CharDriverState *chr)
2496 {
2497 NetCharDriver *s = chr->opaque;
2498
2499 remove_fd_in_watch(chr);
2500 if (s->chan) {
2501 g_io_channel_unref(s->chan);
2502 closesocket(s->fd);
2503 }
2504 g_free(s);
2505 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2506 }
2507
2508 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2509 {
2510 CharDriverState *chr = NULL;
2511 NetCharDriver *s = NULL;
2512
2513 chr = qemu_chr_alloc();
2514 s = g_new0(NetCharDriver, 1);
2515
2516 s->fd = fd;
2517 s->chan = io_channel_from_socket(s->fd);
2518 s->bufcnt = 0;
2519 s->bufptr = 0;
2520 chr->opaque = s;
2521 chr->chr_write = udp_chr_write;
2522 chr->chr_update_read_handler = udp_chr_update_read_handler;
2523 chr->chr_close = udp_chr_close;
2524 /* be isn't opened until we get a connection */
2525 chr->explicit_be_open = true;
2526 return chr;
2527 }
2528
2529 /***********************************************************/
2530 /* TCP Net console */
2531
2532 typedef struct {
2533
2534 GIOChannel *chan, *listen_chan;
2535 guint listen_tag;
2536 int fd, listen_fd;
2537 int connected;
2538 int max_size;
2539 int do_telnetopt;
2540 int do_nodelay;
2541 int is_unix;
2542 int *read_msgfds;
2543 int read_msgfds_num;
2544 int *write_msgfds;
2545 int write_msgfds_num;
2546
2547 SocketAddress *addr;
2548 bool is_listen;
2549 bool is_telnet;
2550
2551 guint reconnect_timer;
2552 int64_t reconnect_time;
2553 bool connect_err_reported;
2554 } TCPCharDriver;
2555
2556 static gboolean socket_reconnect_timeout(gpointer opaque);
2557
2558 static void qemu_chr_socket_restart_timer(CharDriverState *chr)
2559 {
2560 TCPCharDriver *s = chr->opaque;
2561 assert(s->connected == 0);
2562 s->reconnect_timer = g_timeout_add_seconds(s->reconnect_time,
2563 socket_reconnect_timeout, chr);
2564 }
2565
2566 static void check_report_connect_error(CharDriverState *chr,
2567 Error *err)
2568 {
2569 TCPCharDriver *s = chr->opaque;
2570
2571 if (!s->connect_err_reported) {
2572 error_report("Unable to connect character device %s: %s",
2573 chr->label, error_get_pretty(err));
2574 s->connect_err_reported = true;
2575 }
2576 qemu_chr_socket_restart_timer(chr);
2577 }
2578
2579 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2580
2581 #ifndef _WIN32
2582 static int unix_send_msgfds(CharDriverState *chr, const uint8_t *buf, int len)
2583 {
2584 TCPCharDriver *s = chr->opaque;
2585 struct msghdr msgh;
2586 struct iovec iov;
2587 int r;
2588
2589 size_t fd_size = s->write_msgfds_num * sizeof(int);
2590 char control[CMSG_SPACE(fd_size)];
2591 struct cmsghdr *cmsg;
2592
2593 memset(&msgh, 0, sizeof(msgh));
2594 memset(control, 0, sizeof(control));
2595
2596 /* set the payload */
2597 iov.iov_base = (uint8_t *) buf;
2598 iov.iov_len = len;
2599
2600 msgh.msg_iov = &iov;
2601 msgh.msg_iovlen = 1;
2602
2603 msgh.msg_control = control;
2604 msgh.msg_controllen = sizeof(control);
2605
2606 cmsg = CMSG_FIRSTHDR(&msgh);
2607
2608 cmsg->cmsg_len = CMSG_LEN(fd_size);
2609 cmsg->cmsg_level = SOL_SOCKET;
2610 cmsg->cmsg_type = SCM_RIGHTS;
2611 memcpy(CMSG_DATA(cmsg), s->write_msgfds, fd_size);
2612
2613 do {
2614 r = sendmsg(s->fd, &msgh, 0);
2615 } while (r < 0 && errno == EINTR);
2616
2617 /* free the written msgfds, no matter what */
2618 if (s->write_msgfds_num) {
2619 g_free(s->write_msgfds);
2620 s->write_msgfds = 0;
2621 s->write_msgfds_num = 0;
2622 }
2623
2624 return r;
2625 }
2626 #endif
2627
2628 /* Called with chr_write_lock held. */
2629 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2630 {
2631 TCPCharDriver *s = chr->opaque;
2632 if (s->connected) {
2633 #ifndef _WIN32
2634 if (s->is_unix && s->write_msgfds_num) {
2635 return unix_send_msgfds(chr, buf, len);
2636 } else
2637 #endif
2638 {
2639 return io_channel_send(s->chan, buf, len);
2640 }
2641 } else {
2642 /* XXX: indicate an error ? */
2643 return len;
2644 }
2645 }
2646
2647 static int tcp_chr_read_poll(void *opaque)
2648 {
2649 CharDriverState *chr = opaque;
2650 TCPCharDriver *s = chr->opaque;
2651 if (!s->connected)
2652 return 0;
2653 s->max_size = qemu_chr_be_can_write(chr);
2654 return s->max_size;
2655 }
2656
2657 #define IAC 255
2658 #define IAC_BREAK 243
2659 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2660 TCPCharDriver *s,
2661 uint8_t *buf, int *size)
2662 {
2663 /* Handle any telnet client's basic IAC options to satisfy char by
2664 * char mode with no echo. All IAC options will be removed from
2665 * the buf and the do_telnetopt variable will be used to track the
2666 * state of the width of the IAC information.
2667 *
2668 * IAC commands come in sets of 3 bytes with the exception of the
2669 * "IAC BREAK" command and the double IAC.
2670 */
2671
2672 int i;
2673 int j = 0;
2674
2675 for (i = 0; i < *size; i++) {
2676 if (s->do_telnetopt > 1) {
2677 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2678 /* Double IAC means send an IAC */
2679 if (j != i)
2680 buf[j] = buf[i];
2681 j++;
2682 s->do_telnetopt = 1;
2683 } else {
2684 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2685 /* Handle IAC break commands by sending a serial break */
2686 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2687 s->do_telnetopt++;
2688 }
2689 s->do_telnetopt++;
2690 }
2691 if (s->do_telnetopt >= 4) {
2692 s->do_telnetopt = 1;
2693 }
2694 } else {
2695 if ((unsigned char)buf[i] == IAC) {
2696 s->do_telnetopt = 2;
2697 } else {
2698 if (j != i)
2699 buf[j] = buf[i];
2700 j++;
2701 }
2702 }
2703 }
2704 *size = j;
2705 }
2706
2707 static int tcp_get_msgfds(CharDriverState *chr, int *fds, int num)
2708 {
2709 TCPCharDriver *s = chr->opaque;
2710 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
2711
2712 assert(num <= TCP_MAX_FDS);
2713
2714 if (to_copy) {
2715 int i;
2716
2717 memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
2718
2719 /* Close unused fds */
2720 for (i = to_copy; i < s->read_msgfds_num; i++) {
2721 close(s->read_msgfds[i]);
2722 }
2723
2724 g_free(s->read_msgfds);
2725 s->read_msgfds = 0;
2726 s->read_msgfds_num = 0;
2727 }
2728
2729 return to_copy;
2730 }
2731
2732 static int tcp_set_msgfds(CharDriverState *chr, int *fds, int num)
2733 {
2734 TCPCharDriver *s = chr->opaque;
2735
2736 /* clear old pending fd array */
2737 g_free(s->write_msgfds);
2738
2739 if (num) {
2740 s->write_msgfds = g_new(int, num);
2741 memcpy(s->write_msgfds, fds, num * sizeof(int));
2742 }
2743
2744 s->write_msgfds_num = num;
2745
2746 return 0;
2747 }
2748
2749 #ifndef _WIN32
2750 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2751 {
2752 TCPCharDriver *s = chr->opaque;
2753 struct cmsghdr *cmsg;
2754
2755 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2756 int fd_size, i;
2757
2758 if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) ||
2759 cmsg->cmsg_level != SOL_SOCKET ||
2760 cmsg->cmsg_type != SCM_RIGHTS) {
2761 continue;
2762 }
2763
2764 fd_size = cmsg->cmsg_len - CMSG_LEN(0);
2765
2766 if (!fd_size) {
2767 continue;
2768 }
2769
2770 /* close and clean read_msgfds */
2771 for (i = 0; i < s->read_msgfds_num; i++) {
2772 close(s->read_msgfds[i]);
2773 }
2774
2775 if (s->read_msgfds_num) {
2776 g_free(s->read_msgfds);
2777 }
2778
2779 s->read_msgfds_num = fd_size / sizeof(int);
2780 s->read_msgfds = g_malloc(fd_size);
2781 memcpy(s->read_msgfds, CMSG_DATA(cmsg), fd_size);
2782
2783 for (i = 0; i < s->read_msgfds_num; i++) {
2784 int fd = s->read_msgfds[i];
2785 if (fd < 0) {
2786 continue;
2787 }
2788
2789 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2790 qemu_set_block(fd);
2791
2792 #ifndef MSG_CMSG_CLOEXEC
2793 qemu_set_cloexec(fd);
2794 #endif
2795 }
2796 }
2797 }
2798
2799 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2800 {
2801 TCPCharDriver *s = chr->opaque;
2802 struct msghdr msg = { NULL, };
2803 struct iovec iov[1];
2804 union {
2805 struct cmsghdr cmsg;
2806 char control[CMSG_SPACE(sizeof(int) * TCP_MAX_FDS)];
2807 } msg_control;
2808 int flags = 0;
2809 ssize_t ret;
2810
2811 iov[0].iov_base = buf;
2812 iov[0].iov_len = len;
2813
2814 msg.msg_iov = iov;
2815 msg.msg_iovlen = 1;
2816 msg.msg_control = &msg_control;
2817 msg.msg_controllen = sizeof(msg_control);
2818
2819 #ifdef MSG_CMSG_CLOEXEC
2820 flags |= MSG_CMSG_CLOEXEC;
2821 #endif
2822 do {
2823 ret = recvmsg(s->fd, &msg, flags);
2824 } while (ret == -1 && errno == EINTR);
2825
2826 if (ret > 0 && s->is_unix) {
2827 unix_process_msgfd(chr, &msg);
2828 }
2829
2830 return ret;
2831 }
2832 #else
2833 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2834 {
2835 TCPCharDriver *s = chr->opaque;
2836 ssize_t ret;
2837
2838 do {
2839 ret = qemu_recv(s->fd, buf, len, 0);
2840 } while (ret == -1 && socket_error() == EINTR);
2841
2842 return ret;
2843 }
2844 #endif
2845
2846 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2847 {
2848 TCPCharDriver *s = chr->opaque;
2849 return g_io_create_watch(s->chan, cond);
2850 }
2851
2852 static void tcp_chr_disconnect(CharDriverState *chr)
2853 {
2854 TCPCharDriver *s = chr->opaque;
2855
2856 s->connected = 0;
2857 if (s->listen_chan) {
2858 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN,
2859 tcp_chr_accept, chr);
2860 }
2861 remove_fd_in_watch(chr);
2862 g_io_channel_unref(s->chan);
2863 s->chan = NULL;
2864 closesocket(s->fd);
2865 s->fd = -1;
2866 SocketAddress_to_str(chr->filename, CHR_MAX_FILENAME_SIZE,
2867 "disconnected:", s->addr, s->is_listen, s->is_telnet);
2868 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2869 if (s->reconnect_time) {
2870 qemu_chr_socket_restart_timer(chr);
2871 }
2872 }
2873
2874 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2875 {
2876 CharDriverState *chr = opaque;
2877 TCPCharDriver *s = chr->opaque;
2878 uint8_t buf[READ_BUF_LEN];
2879 int len, size;
2880
2881 if (!s->connected || s->max_size <= 0) {
2882 return TRUE;
2883 }
2884 len = sizeof(buf);
2885 if (len > s->max_size)
2886 len = s->max_size;
2887 size = tcp_chr_recv(chr, (void *)buf, len);
2888 if (size == 0 ||
2889 (size < 0 &&
2890 socket_error() != EAGAIN && socket_error() != EWOULDBLOCK)) {
2891 /* connection closed */
2892 tcp_chr_disconnect(chr);
2893 } else if (size > 0) {
2894 if (s->do_telnetopt)
2895 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2896 if (size > 0)
2897 qemu_chr_be_write(chr, buf, size);
2898 }
2899
2900 return TRUE;
2901 }
2902
2903 static int tcp_chr_sync_read(CharDriverState *chr, const uint8_t *buf, int len)
2904 {
2905 TCPCharDriver *s = chr->opaque;
2906 int size;
2907
2908 if (!s->connected) {
2909 return 0;
2910 }
2911
2912 size = tcp_chr_recv(chr, (void *) buf, len);
2913 if (size == 0) {
2914 /* connection closed */
2915 tcp_chr_disconnect(chr);
2916 }
2917
2918 return size;
2919 }
2920
2921 #ifndef _WIN32
2922 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2923 {
2924 CharDriverState *chr = qemu_chr_open_fd(eventfd, eventfd);
2925
2926 if (chr) {
2927 chr->avail_connections = 1;
2928 }
2929
2930 return chr;
2931 }
2932 #endif
2933
2934 static void tcp_chr_connect(void *opaque)
2935 {
2936 CharDriverState *chr = opaque;
2937 TCPCharDriver *s = chr->opaque;
2938 struct sockaddr_storage ss, ps;
2939 socklen_t ss_len = sizeof(ss), ps_len = sizeof(ps);
2940
2941 memset(&ss, 0, ss_len);
2942 if (getsockname(s->fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2943 snprintf(chr->filename, CHR_MAX_FILENAME_SIZE,
2944 "Error in getsockname: %s\n", strerror(errno));
2945 } else if (getpeername(s->fd, (struct sockaddr *) &ps, &ps_len) != 0) {
2946 snprintf(chr->filename, CHR_MAX_FILENAME_SIZE,
2947 "Error in getpeername: %s\n", strerror(errno));
2948 } else {
2949 sockaddr_to_str(chr->filename, CHR_MAX_FILENAME_SIZE,
2950 &ss, ss_len, &ps, ps_len,
2951 s->is_listen, s->is_telnet);
2952 }
2953
2954 s->connected = 1;
2955 if (s->chan) {
2956 chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
2957 tcp_chr_read, chr);
2958 }
2959 qemu_chr_be_generic_open(chr);
2960 }
2961
2962 static void tcp_chr_update_read_handler(CharDriverState *chr)
2963 {
2964 TCPCharDriver *s = chr->opaque;
2965
2966 remove_fd_in_watch(chr);
2967 if (s->chan) {
2968 chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
2969 tcp_chr_read, chr);
2970 }
2971 }
2972
2973 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2974 static void tcp_chr_telnet_init(int fd)
2975 {
2976 char buf[3];
2977 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2978 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2979 send(fd, (char *)buf, 3, 0);
2980 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2981 send(fd, (char *)buf, 3, 0);
2982 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2983 send(fd, (char *)buf, 3, 0);
2984 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2985 send(fd, (char *)buf, 3, 0);
2986 }
2987
2988 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2989 {
2990 TCPCharDriver *s = chr->opaque;
2991 if (s->fd != -1)
2992 return -1;
2993
2994 qemu_set_nonblock(fd);
2995 if (s->do_nodelay)
2996 socket_set_nodelay(fd);
2997 s->fd = fd;
2998 s->chan = io_channel_from_socket(fd);
2999 if (s->listen_tag) {
3000 g_source_remove(s->listen_tag);
3001 s->listen_tag = 0;
3002 }
3003 tcp_chr_connect(chr);
3004
3005 return 0;
3006 }
3007
3008 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
3009 {
3010 CharDriverState *chr = opaque;
3011 TCPCharDriver *s = chr->opaque;
3012 struct sockaddr_in saddr;
3013 #ifndef _WIN32
3014 struct sockaddr_un uaddr;
3015 #endif
3016 struct sockaddr *addr;
3017 socklen_t len;
3018 int fd;
3019
3020 for(;;) {
3021 #ifndef _WIN32
3022 if (s->is_unix) {
3023 len = sizeof(uaddr);
3024 addr = (struct sockaddr *)&uaddr;
3025 } else
3026 #endif
3027 {
3028 len = sizeof(saddr);
3029 addr = (struct sockaddr *)&saddr;
3030 }
3031 fd = qemu_accept(s->listen_fd, addr, &len);
3032 if (fd < 0 && errno != EINTR) {
3033 s->listen_tag = 0;
3034 return FALSE;
3035 } else if (fd >= 0) {
3036 if (s->do_telnetopt)
3037 tcp_chr_telnet_init(fd);
3038 break;
3039 }
3040 }
3041 if (tcp_chr_add_client(chr, fd) < 0)
3042 close(fd);
3043
3044 return TRUE;
3045 }
3046
3047 static void tcp_chr_close(CharDriverState *chr)
3048 {
3049 TCPCharDriver *s = chr->opaque;
3050 int i;
3051
3052 if (s->reconnect_timer) {
3053 g_source_remove(s->reconnect_timer);
3054 s->reconnect_timer = 0;
3055 }
3056 qapi_free_SocketAddress(s->addr);
3057 if (s->fd >= 0) {
3058 remove_fd_in_watch(chr);
3059 if (s->chan) {
3060 g_io_channel_unref(s->chan);
3061 }
3062 closesocket(s->fd);
3063 }
3064 if (s->listen_fd >= 0) {
3065 if (s->listen_tag) {
3066 g_source_remove(s->listen_tag);
3067 s->listen_tag = 0;
3068 }
3069 if (s->listen_chan) {
3070 g_io_channel_unref(s->listen_chan);
3071 }
3072 closesocket(s->listen_fd);
3073 }
3074 if (s->read_msgfds_num) {
3075 for (i = 0; i < s->read_msgfds_num; i++) {
3076 close(s->read_msgfds[i]);
3077 }
3078 g_free(s->read_msgfds);
3079 }
3080 if (s->write_msgfds_num) {
3081 g_free(s->write_msgfds);
3082 }
3083 g_free(s);
3084 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
3085 }
3086
3087 static void qemu_chr_finish_socket_connection(CharDriverState *chr, int fd)
3088 {
3089 TCPCharDriver *s = chr->opaque;
3090
3091 if (s->is_listen) {
3092 s->listen_fd = fd;
3093 s->listen_chan = io_channel_from_socket(s->listen_fd);
3094 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN,
3095 tcp_chr_accept, chr);
3096 } else {
3097 s->connected = 1;
3098 s->fd = fd;
3099 socket_set_nodelay(fd);
3100 s->chan = io_channel_from_socket(s->fd);
3101 tcp_chr_connect(chr);
3102 }
3103 }
3104
3105 static void qemu_chr_socket_connected(int fd, Error *err, void *opaque)
3106 {
3107 CharDriverState *chr = opaque;
3108 TCPCharDriver *s = chr->opaque;
3109
3110 if (fd < 0) {
3111 check_report_connect_error(chr, err);
3112 return;
3113 }
3114
3115 s->connect_err_reported = false;
3116 qemu_chr_finish_socket_connection(chr, fd);
3117 }
3118
3119 static bool qemu_chr_open_socket_fd(CharDriverState *chr, Error **errp)
3120 {
3121 TCPCharDriver *s = chr->opaque;
3122 int fd;
3123
3124 if (s->is_listen) {
3125 fd = socket_listen(s->addr, errp);
3126 } else if (s->reconnect_time) {
3127 fd = socket_connect(s->addr, errp, qemu_chr_socket_connected, chr);
3128 return fd >= 0;
3129 } else {
3130 fd = socket_connect(s->addr, errp, NULL, NULL);
3131 }
3132 if (fd < 0) {
3133 return false;
3134 }
3135
3136 qemu_chr_finish_socket_connection(chr, fd);
3137 return true;
3138 }
3139
3140 /*********************************************************/
3141 /* Ring buffer chardev */
3142
3143 typedef struct {
3144 size_t size;
3145 size_t prod;
3146 size_t cons;
3147 uint8_t *cbuf;
3148 } RingBufCharDriver;
3149
3150 static size_t ringbuf_count(const CharDriverState *chr)
3151 {
3152 const RingBufCharDriver *d = chr->opaque;
3153
3154 return d->prod - d->cons;
3155 }
3156
3157 /* Called with chr_write_lock held. */
3158 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
3159 {
3160 RingBufCharDriver *d = chr->opaque;
3161 int i;
3162
3163 if (!buf || (len < 0)) {
3164 return -1;
3165 }
3166
3167 for (i = 0; i < len; i++ ) {
3168 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
3169 if (d->prod - d->cons > d->size) {
3170 d->cons = d->prod - d->size;
3171 }
3172 }
3173
3174 return 0;
3175 }
3176
3177 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
3178 {
3179 RingBufCharDriver *d = chr->opaque;
3180 int i;
3181
3182 qemu_mutex_lock(&chr->chr_write_lock);
3183 for (i = 0; i < len && d->cons != d->prod; i++) {
3184 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
3185 }
3186 qemu_mutex_unlock(&chr->chr_write_lock);
3187
3188 return i;
3189 }
3190
3191 static void ringbuf_chr_close(struct CharDriverState *chr)
3192 {
3193 RingBufCharDriver *d = chr->opaque;
3194
3195 g_free(d->cbuf);
3196 g_free(d);
3197 chr->opaque = NULL;
3198 }
3199
3200 static CharDriverState *qemu_chr_open_ringbuf(const char *id,
3201 ChardevBackend *backend,
3202 ChardevReturn *ret,
3203 Error **errp)
3204 {
3205 ChardevRingbuf *opts = backend->u.ringbuf;
3206 CharDriverState *chr;
3207 RingBufCharDriver *d;
3208
3209 chr = qemu_chr_alloc();
3210 d = g_malloc(sizeof(*d));
3211
3212 d->size = opts->has_size ? opts->size : 65536;
3213
3214 /* The size must be power of 2 */
3215 if (d->size & (d->size - 1)) {
3216 error_setg(errp, "size of ringbuf chardev must be power of two");
3217 goto fail;
3218 }
3219
3220 d->prod = 0;
3221 d->cons = 0;
3222 d->cbuf = g_malloc0(d->size);
3223
3224 chr->opaque = d;
3225 chr->chr_write = ringbuf_chr_write;
3226 chr->chr_close = ringbuf_chr_close;
3227
3228 return chr;
3229
3230 fail:
3231 g_free(d);
3232 g_free(chr);
3233 return NULL;
3234 }
3235
3236 bool chr_is_ringbuf(const CharDriverState *chr)
3237 {
3238 return chr->chr_write == ringbuf_chr_write;
3239 }
3240
3241 void qmp_ringbuf_write(const char *device, const char *data,
3242 bool has_format, enum DataFormat format,
3243 Error **errp)
3244 {
3245 CharDriverState *chr;
3246 const uint8_t *write_data;
3247 int ret;
3248 gsize write_count;
3249
3250 chr = qemu_chr_find(device);
3251 if (!chr) {
3252 error_setg(errp, "Device '%s' not found", device);
3253 return;
3254 }
3255
3256 if (!chr_is_ringbuf(chr)) {
3257 error_setg(errp,"%s is not a ringbuf device", device);
3258 return;
3259 }
3260
3261 if (has_format && (format == DATA_FORMAT_BASE64)) {
3262 write_data = g_base64_decode(data, &write_count);
3263 } else {
3264 write_data = (uint8_t *)data;
3265 write_count = strlen(data);
3266 }
3267
3268 ret = ringbuf_chr_write(chr, write_data, write_count);
3269
3270 if (write_data != (uint8_t *)data) {
3271 g_free((void *)write_data);
3272 }
3273
3274 if (ret < 0) {
3275 error_setg(errp, "Failed to write to device %s", device);
3276 return;
3277 }
3278 }
3279
3280 char *qmp_ringbuf_read(const char *device, int64_t size,
3281 bool has_format, enum DataFormat format,
3282 Error **errp)
3283 {
3284 CharDriverState *chr;
3285 uint8_t *read_data;
3286 size_t count;
3287 char *data;
3288
3289 chr = qemu_chr_find(device);
3290 if (!chr) {
3291 error_setg(errp, "Device '%s' not found", device);
3292 return NULL;
3293 }
3294
3295 if (!chr_is_ringbuf(chr)) {
3296 error_setg(errp,"%s is not a ringbuf device", device);
3297 return NULL;
3298 }
3299
3300 if (size <= 0) {
3301 error_setg(errp, "size must be greater than zero");
3302 return NULL;
3303 }
3304
3305 count = ringbuf_count(chr);
3306 size = size > count ? count : size;
3307 read_data = g_malloc(size + 1);
3308
3309 ringbuf_chr_read(chr, read_data, size);
3310
3311 if (has_format && (format == DATA_FORMAT_BASE64)) {
3312 data = g_base64_encode(read_data, size);
3313 g_free(read_data);
3314 } else {
3315 /*
3316 * FIXME should read only complete, valid UTF-8 characters up
3317 * to @size bytes. Invalid sequences should be replaced by a
3318 * suitable replacement character. Except when (and only
3319 * when) ring buffer lost characters since last read, initial
3320 * continuation characters should be dropped.
3321 */
3322 read_data[size] = 0;
3323 data = (char *)read_data;
3324 }
3325
3326 return data;
3327 }
3328
3329 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
3330 {
3331 char host[65], port[33], width[8], height[8];
3332 int pos;
3333 const char *p;
3334 QemuOpts *opts;
3335 Error *local_err = NULL;
3336
3337 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
3338 if (local_err) {
3339 error_report_err(local_err);
3340 return NULL;
3341 }
3342
3343 if (strstart(filename, "mon:", &p)) {
3344 filename = p;
3345 qemu_opt_set(opts, "mux", "on", &error_abort);
3346 if (strcmp(filename, "stdio") == 0) {
3347 /* Monitor is muxed to stdio: do not exit on Ctrl+C by default
3348 * but pass it to the guest. Handle this only for compat syntax,
3349 * for -chardev syntax we have special option for this.
3350 * This is what -nographic did, redirecting+muxing serial+monitor
3351 * to stdio causing Ctrl+C to be passed to guest. */
3352 qemu_opt_set(opts, "signal", "off", &error_abort);
3353 }
3354 }
3355
3356 if (strcmp(filename, "null") == 0 ||
3357 strcmp(filename, "pty") == 0 ||
3358 strcmp(filename, "msmouse") == 0 ||
3359 strcmp(filename, "braille") == 0 ||
3360 strcmp(filename, "testdev") == 0 ||
3361 strcmp(filename, "stdio") == 0) {
3362 qemu_opt_set(opts, "backend", filename, &error_abort);
3363 return opts;
3364 }
3365 if (strstart(filename, "vc", &p)) {
3366 qemu_opt_set(opts, "backend", "vc", &error_abort);
3367 if (*p == ':') {
3368 if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
3369 /* pixels */
3370 qemu_opt_set(opts, "width", width, &error_abort);
3371 qemu_opt_set(opts, "height", height, &error_abort);
3372 } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
3373 /* chars */
3374 qemu_opt_set(opts, "cols", width, &error_abort);
3375 qemu_opt_set(opts, "rows", height, &error_abort);
3376 } else {
3377 goto fail;
3378 }
3379 }
3380 return opts;
3381 }
3382 if (strcmp(filename, "con:") == 0) {
3383 qemu_opt_set(opts, "backend", "console", &error_abort);
3384 return opts;
3385 }
3386 if (strstart(filename, "COM", NULL)) {
3387 qemu_opt_set(opts, "backend", "serial", &error_abort);
3388 qemu_opt_set(opts, "path", filename, &error_abort);
3389 return opts;
3390 }
3391 if (strstart(filename, "file:", &p)) {
3392 qemu_opt_set(opts, "backend", "file", &error_abort);
3393 qemu_opt_set(opts, "path", p, &error_abort);
3394 return opts;
3395 }
3396 if (strstart(filename, "pipe:", &p)) {
3397 qemu_opt_set(opts, "backend", "pipe", &error_abort);
3398 qemu_opt_set(opts, "path", p, &error_abort);
3399 return opts;
3400 }
3401 if (strstart(filename, "tcp:", &p) ||
3402 strstart(filename, "telnet:", &p)) {
3403 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3404 host[0] = 0;
3405 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3406 goto fail;
3407 }
3408 qemu_opt_set(opts, "backend", "socket", &error_abort);
3409 qemu_opt_set(opts, "host", host, &error_abort);
3410 qemu_opt_set(opts, "port", port, &error_abort);
3411 if (p[pos] == ',') {
3412 qemu_opts_do_parse(opts, p+pos+1, NULL, &local_err);
3413 if (local_err) {
3414 error_report_err(local_err);
3415 goto fail;
3416 }
3417 }
3418 if (strstart(filename, "telnet:", &p))
3419 qemu_opt_set(opts, "telnet", "on", &error_abort);
3420 return opts;
3421 }
3422 if (strstart(filename, "udp:", &p)) {
3423 qemu_opt_set(opts, "backend", "udp", &error_abort);
3424 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3425 host[0] = 0;
3426 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3427 goto fail;
3428 }
3429 }
3430 qemu_opt_set(opts, "host", host, &error_abort);
3431 qemu_opt_set(opts, "port", port, &error_abort);
3432 if (p[pos] == '@') {
3433 p += pos + 1;
3434 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3435 host[0] = 0;
3436 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3437 goto fail;
3438 }
3439 }
3440 qemu_opt_set(opts, "localaddr", host, &error_abort);
3441 qemu_opt_set(opts, "localport", port, &error_abort);
3442 }
3443 return opts;
3444 }
3445 if (strstart(filename, "unix:", &p)) {
3446 qemu_opt_set(opts, "backend", "socket", &error_abort);
3447 qemu_opts_do_parse(opts, p, "path", &local_err);
3448 if (local_err) {
3449 error_report_err(local_err);
3450 goto fail;
3451 }
3452 return opts;
3453 }
3454 if (strstart(filename, "/dev/parport", NULL) ||
3455 strstart(filename, "/dev/ppi", NULL)) {
3456 qemu_opt_set(opts, "backend", "parport", &error_abort);
3457 qemu_opt_set(opts, "path", filename, &error_abort);
3458 return opts;
3459 }
3460 if (strstart(filename, "/dev/", NULL)) {
3461 qemu_opt_set(opts, "backend", "tty", &error_abort);
3462 qemu_opt_set(opts, "path", filename, &error_abort);
3463 return opts;
3464 }
3465
3466 fail:
3467 qemu_opts_del(opts);
3468 return NULL;
3469 }
3470
3471 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3472 Error **errp)
3473 {
3474 const char *path = qemu_opt_get(opts, "path");
3475
3476 if (path == NULL) {
3477 error_setg(errp, "chardev: file: no filename given");
3478 return;
3479 }
3480 backend->u.file = g_new0(ChardevFile, 1);
3481 backend->u.file->out = g_strdup(path);
3482 }
3483
3484 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3485 Error **errp)
3486 {
3487 backend->u.stdio = g_new0(ChardevStdio, 1);
3488 backend->u.stdio->has_signal = true;
3489 backend->u.stdio->signal = qemu_opt_get_bool(opts, "signal", true);
3490 }
3491
3492 #ifdef HAVE_CHARDEV_SERIAL
3493 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3494 Error **errp)
3495 {
3496 const char *device = qemu_opt_get(opts, "path");
3497
3498 if (device == NULL) {
3499 error_setg(errp, "chardev: serial/tty: no device path given");
3500 return;
3501 }
3502 backend->u.serial = g_new0(ChardevHostdev, 1);
3503 backend->u.serial->device = g_strdup(device);
3504 }
3505 #endif
3506
3507 #ifdef HAVE_CHARDEV_PARPORT
3508 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3509 Error **errp)
3510 {
3511 const char *device = qemu_opt_get(opts, "path");
3512
3513 if (device == NULL) {
3514 error_setg(errp, "chardev: parallel: no device path given");
3515 return;
3516 }
3517 backend->u.parallel = g_new0(ChardevHostdev, 1);
3518 backend->u.parallel->device = g_strdup(device);
3519 }
3520 #endif
3521
3522 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3523 Error **errp)
3524 {
3525 const char *device = qemu_opt_get(opts, "path");
3526
3527 if (device == NULL) {
3528 error_setg(errp, "chardev: pipe: no device path given");
3529 return;
3530 }
3531 backend->u.pipe = g_new0(ChardevHostdev, 1);
3532 backend->u.pipe->device = g_strdup(device);
3533 }
3534
3535 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3536 Error **errp)
3537 {
3538 int val;
3539
3540 backend->u.ringbuf = g_new0(ChardevRingbuf, 1);
3541
3542 val = qemu_opt_get_size(opts, "size", 0);
3543 if (val != 0) {
3544 backend->u.ringbuf->has_size = true;
3545 backend->u.ringbuf->size = val;
3546 }
3547 }
3548
3549 static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
3550 Error **errp)
3551 {
3552 const char *chardev = qemu_opt_get(opts, "chardev");
3553
3554 if (chardev == NULL) {
3555 error_setg(errp, "chardev: mux: no chardev given");
3556 return;
3557 }
3558 backend->u.mux = g_new0(ChardevMux, 1);
3559 backend->u.mux->chardev = g_strdup(chardev);
3560 }
3561
3562 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
3563 Error **errp)
3564 {
3565 bool is_listen = qemu_opt_get_bool(opts, "server", false);
3566 bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true);
3567 bool is_telnet = qemu_opt_get_bool(opts, "telnet", false);
3568 bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true);
3569 int64_t reconnect = qemu_opt_get_number(opts, "reconnect", 0);
3570 const char *path = qemu_opt_get(opts, "path");
3571 const char *host = qemu_opt_get(opts, "host");
3572 const char *port = qemu_opt_get(opts, "port");
3573 SocketAddress *addr;
3574
3575 if (!path) {
3576 if (!host) {
3577 error_setg(errp, "chardev: socket: no host given");
3578 return;
3579 }
3580 if (!port) {
3581 error_setg(errp, "chardev: socket: no port given");
3582 return;
3583 }
3584 }
3585
3586 backend->u.socket = g_new0(ChardevSocket, 1);
3587
3588 backend->u.socket->has_nodelay = true;
3589 backend->u.socket->nodelay = do_nodelay;
3590 backend->u.socket->has_server = true;
3591 backend->u.socket->server = is_listen;
3592 backend->u.socket->has_telnet = true;
3593 backend->u.socket->telnet = is_telnet;
3594 backend->u.socket->has_wait = true;
3595 backend->u.socket->wait = is_waitconnect;
3596 backend->u.socket->has_reconnect = true;
3597 backend->u.socket->reconnect = reconnect;
3598
3599 addr = g_new0(SocketAddress, 1);
3600 if (path) {
3601 addr->type = SOCKET_ADDRESS_KIND_UNIX;
3602 addr->u.q_unix = g_new0(UnixSocketAddress, 1);
3603 addr->u.q_unix->path = g_strdup(path);
3604 } else {
3605 addr->type = SOCKET_ADDRESS_KIND_INET;
3606 addr->u.inet = g_new0(InetSocketAddress, 1);
3607 addr->u.inet->host = g_strdup(host);
3608 addr->u.inet->port = g_strdup(port);
3609 addr->u.inet->has_to = qemu_opt_get(opts, "to");
3610 addr->u.inet->to = qemu_opt_get_number(opts, "to", 0);
3611 addr->u.inet->has_ipv4 = qemu_opt_get(opts, "ipv4");
3612 addr->u.inet->ipv4 = qemu_opt_get_bool(opts, "ipv4", 0);
3613 addr->u.inet->has_ipv6 = qemu_opt_get(opts, "ipv6");
3614 addr->u.inet->ipv6 = qemu_opt_get_bool(opts, "ipv6", 0);
3615 }
3616 backend->u.socket->addr = addr;
3617 }
3618
3619 static void qemu_chr_parse_udp(QemuOpts *opts, ChardevBackend *backend,
3620 Error **errp)
3621 {
3622 const char *host = qemu_opt_get(opts, "host");
3623 const char *port = qemu_opt_get(opts, "port");
3624 const char *localaddr = qemu_opt_get(opts, "localaddr");
3625 const char *localport = qemu_opt_get(opts, "localport");
3626 bool has_local = false;
3627 SocketAddress *addr;
3628
3629 if (host == NULL || strlen(host) == 0) {
3630 host = "localhost";
3631 }
3632 if (port == NULL || strlen(port) == 0) {
3633 error_setg(errp, "chardev: udp: remote port not specified");
3634 return;
3635 }
3636 if (localport == NULL || strlen(localport) == 0) {
3637 localport = "0";
3638 } else {
3639 has_local = true;
3640 }
3641 if (localaddr == NULL || strlen(localaddr) == 0) {
3642 localaddr = "";
3643 } else {
3644 has_local = true;
3645 }
3646
3647 backend->u.udp = g_new0(ChardevUdp, 1);
3648
3649 addr = g_new0(SocketAddress, 1);
3650 addr->type = SOCKET_ADDRESS_KIND_INET;
3651 addr->u.inet = g_new0(InetSocketAddress, 1);
3652 addr->u.inet->host = g_strdup(host);
3653 addr->u.inet->port = g_strdup(port);
3654 addr->u.inet->has_ipv4 = qemu_opt_get(opts, "ipv4");
3655 addr->u.inet->ipv4 = qemu_opt_get_bool(opts, "ipv4", 0);
3656 addr->u.inet->has_ipv6 = qemu_opt_get(opts, "ipv6");
3657 addr->u.inet->ipv6 = qemu_opt_get_bool(opts, "ipv6", 0);
3658 backend->u.udp->remote = addr;
3659
3660 if (has_local) {
3661 backend->u.udp->has_local = true;
3662 addr = g_new0(SocketAddress, 1);
3663 addr->type = SOCKET_ADDRESS_KIND_INET;
3664 addr->u.inet = g_new0(InetSocketAddress, 1);
3665 addr->u.inet->host = g_strdup(localaddr);
3666 addr->u.inet->port = g_strdup(localport);
3667 backend->u.udp->local = addr;
3668 }
3669 }
3670
3671 typedef struct CharDriver {
3672 const char *name;
3673 ChardevBackendKind kind;
3674 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3675 CharDriverState *(*create)(const char *id, ChardevBackend *backend,
3676 ChardevReturn *ret, Error **errp);
3677 } CharDriver;
3678
3679 static GSList *backends;
3680
3681 void register_char_driver(const char *name, 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 {
3686 CharDriver *s;
3687
3688 s = g_malloc0(sizeof(*s));
3689 s->name = g_strdup(name);
3690 s->kind = kind;
3691 s->parse = parse;
3692 s->create = create;
3693
3694 backends = g_slist_append(backends, s);
3695 }
3696
3697 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3698 void (*init)(struct CharDriverState *s),
3699 Error **errp)
3700 {
3701 Error *local_err = NULL;
3702 CharDriver *cd;
3703 CharDriverState *chr;
3704 GSList *i;
3705 ChardevReturn *ret = NULL;
3706 ChardevBackend *backend;
3707 const char *id = qemu_opts_id(opts);
3708 char *bid = NULL;
3709
3710 if (id == NULL) {
3711 error_setg(errp, "chardev: no id specified");
3712 goto err;
3713 }
3714
3715 if (qemu_opt_get(opts, "backend") == NULL) {
3716 error_setg(errp, "chardev: \"%s\" missing backend",
3717 qemu_opts_id(opts));
3718 goto err;
3719 }
3720 for (i = backends; i; i = i->next) {
3721 cd = i->data;
3722
3723 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3724 break;
3725 }
3726 }
3727 if (i == NULL) {
3728 error_setg(errp, "chardev: backend \"%s\" not found",
3729 qemu_opt_get(opts, "backend"));
3730 goto err;
3731 }
3732
3733 backend = g_new0(ChardevBackend, 1);
3734
3735 if (qemu_opt_get_bool(opts, "mux", 0)) {
3736 bid = g_strdup_printf("%s-base", id);
3737 }
3738
3739 chr = NULL;
3740 backend->type = cd->kind;
3741 if (cd->parse) {
3742 cd->parse(opts, backend, &local_err);
3743 if (local_err) {
3744 error_propagate(errp, local_err);
3745 goto qapi_out;
3746 }
3747 }
3748 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3749 if (!ret) {
3750 goto qapi_out;
3751 }
3752
3753 if (bid) {
3754 qapi_free_ChardevBackend(backend);
3755 qapi_free_ChardevReturn(ret);
3756 backend = g_new0(ChardevBackend, 1);
3757 backend->u.mux = g_new0(ChardevMux, 1);
3758 backend->type = CHARDEV_BACKEND_KIND_MUX;
3759 backend->u.mux->chardev = g_strdup(bid);
3760 ret = qmp_chardev_add(id, backend, errp);
3761 if (!ret) {
3762 chr = qemu_chr_find(bid);
3763 qemu_chr_delete(chr);
3764 chr = NULL;
3765 goto qapi_out;
3766 }
3767 }
3768
3769 chr = qemu_chr_find(id);
3770 chr->opts = opts;
3771
3772 qapi_out:
3773 qapi_free_ChardevBackend(backend);
3774 qapi_free_ChardevReturn(ret);
3775 g_free(bid);
3776 return chr;
3777
3778 err:
3779 qemu_opts_del(opts);
3780 return NULL;
3781 }
3782
3783 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3784 {
3785 const char *p;
3786 CharDriverState *chr;
3787 QemuOpts *opts;
3788 Error *err = NULL;
3789
3790 if (strstart(filename, "chardev:", &p)) {
3791 return qemu_chr_find(p);
3792 }
3793
3794 opts = qemu_chr_parse_compat(label, filename);
3795 if (!opts)
3796 return NULL;
3797
3798 chr = qemu_chr_new_from_opts(opts, init, &err);
3799 if (err) {
3800 error_report_err(err);
3801 }
3802 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3803 qemu_chr_fe_claim_no_fail(chr);
3804 monitor_init(chr, MONITOR_USE_READLINE);
3805 }
3806 return chr;
3807 }
3808
3809 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3810 {
3811 if (chr->chr_set_echo) {
3812 chr->chr_set_echo(chr, echo);
3813 }
3814 }
3815
3816 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
3817 {
3818 if (chr->fe_open == fe_open) {
3819 return;
3820 }
3821 chr->fe_open = fe_open;
3822 if (chr->chr_set_fe_open) {
3823 chr->chr_set_fe_open(chr, fe_open);
3824 }
3825 }
3826
3827 void qemu_chr_fe_event(struct CharDriverState *chr, int event)
3828 {
3829 if (chr->chr_fe_event) {
3830 chr->chr_fe_event(chr, event);
3831 }
3832 }
3833
3834 int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3835 GIOFunc func, void *user_data)
3836 {
3837 GSource *src;
3838 guint tag;
3839
3840 if (s->chr_add_watch == NULL) {
3841 return -ENOSYS;
3842 }
3843
3844 src = s->chr_add_watch(s, cond);
3845 if (!src) {
3846 return -EINVAL;
3847 }
3848
3849 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3850 tag = g_source_attach(src, NULL);
3851 g_source_unref(src);
3852
3853 return tag;
3854 }
3855
3856 int qemu_chr_fe_claim(CharDriverState *s)
3857 {
3858 if (s->avail_connections < 1) {
3859 return -1;
3860 }
3861 s->avail_connections--;
3862 return 0;
3863 }
3864
3865 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
3866 {
3867 if (qemu_chr_fe_claim(s) != 0) {
3868 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
3869 __func__, s->label);
3870 exit(1);
3871 }
3872 }
3873
3874 void qemu_chr_fe_release(CharDriverState *s)
3875 {
3876 s->avail_connections++;
3877 }
3878
3879 void qemu_chr_free(CharDriverState *chr)
3880 {
3881 if (chr->chr_close) {
3882 chr->chr_close(chr);
3883 }
3884 g_free(chr->filename);
3885 g_free(chr->label);
3886 qemu_opts_del(chr->opts);
3887 g_free(chr);
3888 }
3889
3890 void qemu_chr_delete(CharDriverState *chr)
3891 {
3892 QTAILQ_REMOVE(&chardevs, chr, next);
3893 qemu_chr_free(chr);
3894 }
3895
3896 ChardevInfoList *qmp_query_chardev(Error **errp)
3897 {
3898 ChardevInfoList *chr_list = NULL;
3899 CharDriverState *chr;
3900
3901 QTAILQ_FOREACH(chr, &chardevs, next) {
3902 ChardevInfoList *info = g_malloc0(sizeof(*info));
3903 info->value = g_malloc0(sizeof(*info->value));
3904 info->value->label = g_strdup(chr->label);
3905 info->value->filename = g_strdup(chr->filename);
3906 info->value->frontend_open = chr->fe_open;
3907
3908 info->next = chr_list;
3909 chr_list = info;
3910 }
3911
3912 return chr_list;
3913 }
3914
3915 ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp)
3916 {
3917 ChardevBackendInfoList *backend_list = NULL;
3918 CharDriver *c = NULL;
3919 GSList *i = NULL;
3920
3921 for (i = backends; i; i = i->next) {
3922 ChardevBackendInfoList *info = g_malloc0(sizeof(*info));
3923 c = i->data;
3924 info->value = g_malloc0(sizeof(*info->value));
3925 info->value->name = g_strdup(c->name);
3926
3927 info->next = backend_list;
3928 backend_list = info;
3929 }
3930
3931 return backend_list;
3932 }
3933
3934 CharDriverState *qemu_chr_find(const char *name)
3935 {
3936 CharDriverState *chr;
3937
3938 QTAILQ_FOREACH(chr, &chardevs, next) {
3939 if (strcmp(chr->label, name) != 0)
3940 continue;
3941 return chr;
3942 }
3943 return NULL;
3944 }
3945
3946 /* Get a character (serial) device interface. */
3947 CharDriverState *qemu_char_get_next_serial(void)
3948 {
3949 static int next_serial;
3950 CharDriverState *chr;
3951
3952 /* FIXME: This function needs to go away: use chardev properties! */
3953
3954 while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
3955 chr = serial_hds[next_serial++];
3956 qemu_chr_fe_claim_no_fail(chr);
3957 return chr;
3958 }
3959 return NULL;
3960 }
3961
3962 QemuOptsList qemu_chardev_opts = {
3963 .name = "chardev",
3964 .implied_opt_name = "backend",
3965 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3966 .desc = {
3967 {
3968 .name = "backend",
3969 .type = QEMU_OPT_STRING,
3970 },{
3971 .name = "path",
3972 .type = QEMU_OPT_STRING,
3973 },{
3974 .name = "host",
3975 .type = QEMU_OPT_STRING,
3976 },{
3977 .name = "port",
3978 .type = QEMU_OPT_STRING,
3979 },{
3980 .name = "localaddr",
3981 .type = QEMU_OPT_STRING,
3982 },{
3983 .name = "localport",
3984 .type = QEMU_OPT_STRING,
3985 },{
3986 .name = "to",
3987 .type = QEMU_OPT_NUMBER,
3988 },{
3989 .name = "ipv4",
3990 .type = QEMU_OPT_BOOL,
3991 },{
3992 .name = "ipv6",
3993 .type = QEMU_OPT_BOOL,
3994 },{
3995 .name = "wait",
3996 .type = QEMU_OPT_BOOL,
3997 },{
3998 .name = "server",
3999 .type = QEMU_OPT_BOOL,
4000 },{
4001 .name = "delay",
4002 .type = QEMU_OPT_BOOL,
4003 },{
4004 .name = "reconnect",
4005 .type = QEMU_OPT_NUMBER,
4006 },{
4007 .name = "telnet",
4008 .type = QEMU_OPT_BOOL,
4009 },{
4010 .name = "width",
4011 .type = QEMU_OPT_NUMBER,
4012 },{
4013 .name = "height",
4014 .type = QEMU_OPT_NUMBER,
4015 },{
4016 .name = "cols",
4017 .type = QEMU_OPT_NUMBER,
4018 },{
4019 .name = "rows",
4020 .type = QEMU_OPT_NUMBER,
4021 },{
4022 .name = "mux",
4023 .type = QEMU_OPT_BOOL,
4024 },{
4025 .name = "signal",
4026 .type = QEMU_OPT_BOOL,
4027 },{
4028 .name = "name",
4029 .type = QEMU_OPT_STRING,
4030 },{
4031 .name = "debug",
4032 .type = QEMU_OPT_NUMBER,
4033 },{
4034 .name = "size",
4035 .type = QEMU_OPT_SIZE,
4036 },{
4037 .name = "chardev",
4038 .type = QEMU_OPT_STRING,
4039 },
4040 { /* end of list */ }
4041 },
4042 };
4043
4044 #ifdef _WIN32
4045
4046 static CharDriverState *qmp_chardev_open_file(const char *id,
4047 ChardevBackend *backend,
4048 ChardevReturn *ret,
4049 Error **errp)
4050 {
4051 ChardevFile *file = backend->u.file;
4052 HANDLE out;
4053
4054 if (file->has_in) {
4055 error_setg(errp, "input file not supported");
4056 return NULL;
4057 }
4058
4059 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
4060 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
4061 if (out == INVALID_HANDLE_VALUE) {
4062 error_setg(errp, "open %s failed", file->out);
4063 return NULL;
4064 }
4065 return qemu_chr_open_win_file(out);
4066 }
4067
4068 static CharDriverState *qmp_chardev_open_serial(const char *id,
4069 ChardevBackend *backend,
4070 ChardevReturn *ret,
4071 Error **errp)
4072 {
4073 ChardevHostdev *serial = backend->u.serial;
4074 return qemu_chr_open_win_path(serial->device, errp);
4075 }
4076
4077 #else /* WIN32 */
4078
4079 static int qmp_chardev_open_file_source(char *src, int flags,
4080 Error **errp)
4081 {
4082 int fd = -1;
4083
4084 TFR(fd = qemu_open(src, flags, 0666));
4085 if (fd == -1) {
4086 error_setg_file_open(errp, errno, src);
4087 }
4088 return fd;
4089 }
4090
4091 static CharDriverState *qmp_chardev_open_file(const char *id,
4092 ChardevBackend *backend,
4093 ChardevReturn *ret,
4094 Error **errp)
4095 {
4096 ChardevFile *file = backend->u.file;
4097 int flags, in = -1, out;
4098
4099 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
4100 out = qmp_chardev_open_file_source(file->out, flags, errp);
4101 if (out < 0) {
4102 return NULL;
4103 }
4104
4105 if (file->has_in) {
4106 flags = O_RDONLY;
4107 in = qmp_chardev_open_file_source(file->in, flags, errp);
4108 if (in < 0) {
4109 qemu_close(out);
4110 return NULL;
4111 }
4112 }
4113
4114 return qemu_chr_open_fd(in, out);
4115 }
4116
4117 #ifdef HAVE_CHARDEV_SERIAL
4118 static CharDriverState *qmp_chardev_open_serial(const char *id,
4119 ChardevBackend *backend,
4120 ChardevReturn *ret,
4121 Error **errp)
4122 {
4123 ChardevHostdev *serial = backend->u.serial;
4124 int fd;
4125
4126 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
4127 if (fd < 0) {
4128 return NULL;
4129 }
4130 qemu_set_nonblock(fd);
4131 return qemu_chr_open_tty_fd(fd);
4132 }
4133 #endif
4134
4135 #ifdef HAVE_CHARDEV_PARPORT
4136 static CharDriverState *qmp_chardev_open_parallel(const char *id,
4137 ChardevBackend *backend,
4138 ChardevReturn *ret,
4139 Error **errp)
4140 {
4141 ChardevHostdev *parallel = backend->u.parallel;
4142 int fd;
4143
4144 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
4145 if (fd < 0) {
4146 return NULL;
4147 }
4148 return qemu_chr_open_pp_fd(fd, errp);
4149 }
4150 #endif
4151
4152 #endif /* WIN32 */
4153
4154 static void socket_try_connect(CharDriverState *chr)
4155 {
4156 Error *err = NULL;
4157
4158 if (!qemu_chr_open_socket_fd(chr, &err)) {
4159 check_report_connect_error(chr, err);
4160 }
4161 }
4162
4163 static gboolean socket_reconnect_timeout(gpointer opaque)
4164 {
4165 CharDriverState *chr = opaque;
4166 TCPCharDriver *s = chr->opaque;
4167
4168 s->reconnect_timer = 0;
4169
4170 if (chr->be_open) {
4171 return false;
4172 }
4173
4174 socket_try_connect(chr);
4175
4176 return false;
4177 }
4178
4179 static CharDriverState *qmp_chardev_open_socket(const char *id,
4180 ChardevBackend *backend,
4181 ChardevReturn *ret,
4182 Error **errp)
4183 {
4184 CharDriverState *chr;
4185 TCPCharDriver *s;
4186 ChardevSocket *sock = backend->u.socket;
4187 SocketAddress *addr = sock->addr;
4188 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
4189 bool is_listen = sock->has_server ? sock->server : true;
4190 bool is_telnet = sock->has_telnet ? sock->telnet : false;
4191 bool is_waitconnect = sock->has_wait ? sock->wait : false;
4192 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0;
4193
4194 chr = qemu_chr_alloc();
4195 s = g_new0(TCPCharDriver, 1);
4196
4197 s->fd = -1;
4198 s->listen_fd = -1;
4199 s->is_unix = addr->type == SOCKET_ADDRESS_KIND_UNIX;
4200 s->is_listen = is_listen;
4201 s->is_telnet = is_telnet;
4202 s->do_nodelay = do_nodelay;
4203 qapi_copy_SocketAddress(&s->addr, sock->addr);
4204
4205 chr->opaque = s;
4206 chr->chr_write = tcp_chr_write;
4207 chr->chr_sync_read = tcp_chr_sync_read;
4208 chr->chr_close = tcp_chr_close;
4209 chr->get_msgfds = tcp_get_msgfds;
4210 chr->set_msgfds = tcp_set_msgfds;
4211 chr->chr_add_client = tcp_chr_add_client;
4212 chr->chr_add_watch = tcp_chr_add_watch;
4213 chr->chr_update_read_handler = tcp_chr_update_read_handler;
4214 /* be isn't opened until we get a connection */
4215 chr->explicit_be_open = true;
4216
4217 chr->filename = g_malloc(CHR_MAX_FILENAME_SIZE);
4218 SocketAddress_to_str(chr->filename, CHR_MAX_FILENAME_SIZE, "disconnected:",
4219 addr, is_listen, is_telnet);
4220
4221 if (is_listen) {
4222 if (is_telnet) {
4223 s->do_telnetopt = 1;
4224 }
4225 } else if (reconnect > 0) {
4226 s->reconnect_time = reconnect;
4227 }
4228
4229 if (s->reconnect_time) {
4230 socket_try_connect(chr);
4231 } else if (!qemu_chr_open_socket_fd(chr, errp)) {
4232 g_free(s);
4233 g_free(chr->filename);
4234 g_free(chr);
4235 return NULL;
4236 }
4237
4238 if (is_listen && is_waitconnect) {
4239 fprintf(stderr, "QEMU waiting for connection on: %s\n",
4240 chr->filename);
4241 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
4242 qemu_set_nonblock(s->listen_fd);
4243 }
4244
4245 return chr;
4246 }
4247
4248 static CharDriverState *qmp_chardev_open_udp(const char *id,
4249 ChardevBackend *backend,
4250 ChardevReturn *ret,
4251 Error **errp)
4252 {
4253 ChardevUdp *udp = backend->u.udp;
4254 int fd;
4255
4256 fd = socket_dgram(udp->remote, udp->local, errp);
4257 if (fd < 0) {
4258 return NULL;
4259 }
4260 return qemu_chr_open_udp_fd(fd);
4261 }
4262
4263 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
4264 Error **errp)
4265 {
4266 ChardevReturn *ret = g_new0(ChardevReturn, 1);
4267 CharDriverState *chr = NULL;
4268 Error *local_err = NULL;
4269 GSList *i;
4270 CharDriver *cd;
4271
4272 chr = qemu_chr_find(id);
4273 if (chr) {
4274 error_setg(errp, "Chardev '%s' already exists", id);
4275 g_free(ret);
4276 return NULL;
4277 }
4278
4279 for (i = backends; i; i = i->next) {
4280 cd = i->data;
4281
4282 if (cd->kind == backend->type) {
4283 chr = cd->create(id, backend, ret, &local_err);
4284 if (local_err) {
4285 error_propagate(errp, local_err);
4286 goto out_error;
4287 }
4288 break;
4289 }
4290 }
4291
4292 if (chr == NULL) {
4293 assert(!i);
4294 error_setg(errp, "chardev backend not available");
4295 goto out_error;
4296 }
4297
4298 chr->label = g_strdup(id);
4299 chr->avail_connections =
4300 (backend->type == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
4301 if (!chr->filename) {
4302 chr->filename = g_strdup(ChardevBackendKind_lookup[backend->type]);
4303 }
4304 if (!chr->explicit_be_open) {
4305 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
4306 }
4307 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
4308 return ret;
4309
4310 out_error:
4311 g_free(ret);
4312 return NULL;
4313 }
4314
4315 void qmp_chardev_remove(const char *id, Error **errp)
4316 {
4317 CharDriverState *chr;
4318
4319 chr = qemu_chr_find(id);
4320 if (chr == NULL) {
4321 error_setg(errp, "Chardev '%s' not found", id);
4322 return;
4323 }
4324 if (chr->chr_can_read || chr->chr_read ||
4325 chr->chr_event || chr->handler_opaque) {
4326 error_setg(errp, "Chardev '%s' is busy", id);
4327 return;
4328 }
4329 qemu_chr_delete(chr);
4330 }
4331
4332 static void register_types(void)
4333 {
4334 register_char_driver("null", CHARDEV_BACKEND_KIND_NULL, NULL,
4335 qemu_chr_open_null);
4336 register_char_driver("socket", CHARDEV_BACKEND_KIND_SOCKET,
4337 qemu_chr_parse_socket, qmp_chardev_open_socket);
4338 register_char_driver("udp", CHARDEV_BACKEND_KIND_UDP, qemu_chr_parse_udp,
4339 qmp_chardev_open_udp);
4340 register_char_driver("ringbuf", CHARDEV_BACKEND_KIND_RINGBUF,
4341 qemu_chr_parse_ringbuf, qemu_chr_open_ringbuf);
4342 register_char_driver("file", CHARDEV_BACKEND_KIND_FILE,
4343 qemu_chr_parse_file_out, qmp_chardev_open_file);
4344 register_char_driver("stdio", CHARDEV_BACKEND_KIND_STDIO,
4345 qemu_chr_parse_stdio, qemu_chr_open_stdio);
4346 #if defined HAVE_CHARDEV_SERIAL
4347 register_char_driver("serial", CHARDEV_BACKEND_KIND_SERIAL,
4348 qemu_chr_parse_serial, qmp_chardev_open_serial);
4349 register_char_driver("tty", CHARDEV_BACKEND_KIND_SERIAL,
4350 qemu_chr_parse_serial, qmp_chardev_open_serial);
4351 #endif
4352 #ifdef HAVE_CHARDEV_PARPORT
4353 register_char_driver("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
4354 qemu_chr_parse_parallel, qmp_chardev_open_parallel);
4355 register_char_driver("parport", CHARDEV_BACKEND_KIND_PARALLEL,
4356 qemu_chr_parse_parallel, qmp_chardev_open_parallel);
4357 #endif
4358 #ifdef HAVE_CHARDEV_PTY
4359 register_char_driver("pty", CHARDEV_BACKEND_KIND_PTY, NULL,
4360 qemu_chr_open_pty);
4361 #endif
4362 #ifdef _WIN32
4363 register_char_driver("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL,
4364 qemu_chr_open_win_con);
4365 #endif
4366 register_char_driver("pipe", CHARDEV_BACKEND_KIND_PIPE,
4367 qemu_chr_parse_pipe, qemu_chr_open_pipe);
4368 register_char_driver("mux", CHARDEV_BACKEND_KIND_MUX, qemu_chr_parse_mux,
4369 qemu_chr_open_mux);
4370 /* Bug-compatibility: */
4371 register_char_driver("memory", CHARDEV_BACKEND_KIND_MEMORY,
4372 qemu_chr_parse_ringbuf, qemu_chr_open_ringbuf);
4373 /* this must be done after machine init, since we register FEs with muxes
4374 * as part of realize functions like serial_isa_realizefn when -nographic
4375 * is specified
4376 */
4377 qemu_add_machine_init_done_notifier(&muxes_realize_notify);
4378 }
4379
4380 type_init(register_types);
QEmu