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s390x: Add interlocked access facility 1 instructions
[qemu/rayw.git] / qemu-char.c
blobd0c1564306d268c4d488f5e53116e6f6ac115022
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/timer.h"
28 #include "sysemu/char.h"
29 #include "hw/usb.h"
30 #include "qmp-commands.h"
31 #include "qapi/qmp-input-visitor.h"
32 #include "qapi/qmp-output-visitor.h"
33 #include "qapi-visit.h"
34
35 #include <unistd.h>
36 #include <fcntl.h>
37 #include <time.h>
38 #include <errno.h>
39 #include <sys/time.h>
40 #include <zlib.h>
41
42 #ifndef _WIN32
43 #include <sys/times.h>
44 #include <sys/wait.h>
45 #include <termios.h>
46 #include <sys/mman.h>
47 #include <sys/ioctl.h>
48 #include <sys/resource.h>
49 #include <sys/socket.h>
50 #include <netinet/in.h>
51 #include <net/if.h>
52 #include <arpa/inet.h>
53 #include <dirent.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 static void qapi_copy_SocketAddress(SocketAddress **p_dest,
96 SocketAddress *src)
97 {
98 QmpOutputVisitor *qov;
99 QmpInputVisitor *qiv;
100 Visitor *ov, *iv;
101 QObject *obj;
102
103 *p_dest = NULL;
104
105 qov = qmp_output_visitor_new();
106 ov = qmp_output_get_visitor(qov);
107 visit_type_SocketAddress(ov, &src, NULL, &error_abort);
108 obj = qmp_output_get_qobject(qov);
109 qmp_output_visitor_cleanup(qov);
110 if (!obj) {
111 return;
112 }
113
114 qiv = qmp_input_visitor_new(obj);
115 iv = qmp_input_get_visitor(qiv);
116 visit_type_SocketAddress(iv, p_dest, NULL, &error_abort);
117 qmp_input_visitor_cleanup(qiv);
118 qobject_decref(obj);
119 }
120
121 static int SocketAddress_to_str(char *dest, int max_len,
122 const char *prefix, SocketAddress *addr,
123 bool is_listen, bool is_telnet)
124 {
125 switch (addr->kind) {
126 case SOCKET_ADDRESS_KIND_INET:
127 return snprintf(dest, max_len, "%s%s:%s:%s%s", prefix,
128 is_telnet ? "telnet" : "tcp", addr->inet->host,
129 addr->inet->port, is_listen ? ",server" : "");
130 break;
131 case SOCKET_ADDRESS_KIND_UNIX:
132 return snprintf(dest, max_len, "%sunix:%s%s", prefix,
133 addr->q_unix->path, is_listen ? ",server" : "");
134 break;
135 case SOCKET_ADDRESS_KIND_FD:
136 return snprintf(dest, max_len, "%sfd:%s%s", prefix, addr->fd->str,
137 is_listen ? ",server" : "");
138 break;
139 default:
140 abort();
141 }
142 }
143
144 static int sockaddr_to_str(char *dest, int max_len,
145 struct sockaddr_storage *ss, socklen_t ss_len,
146 struct sockaddr_storage *ps, socklen_t ps_len,
147 bool is_listen, bool is_telnet)
148 {
149 char shost[NI_MAXHOST], sserv[NI_MAXSERV];
150 char phost[NI_MAXHOST], pserv[NI_MAXSERV];
151 const char *left = "", *right = "";
152
153 switch (ss->ss_family) {
154 #ifndef _WIN32
155 case AF_UNIX:
156 return snprintf(dest, max_len, "unix:%s%s",
157 ((struct sockaddr_un *)(ss))->sun_path,
158 is_listen ? ",server" : "");
159 #endif
160 case AF_INET6:
161 left = "[";
162 right = "]";
163 /* fall through */
164 case AF_INET:
165 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost),
166 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV);
167 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost),
168 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV);
169 return snprintf(dest, max_len, "%s:%s%s%s:%s%s <-> %s%s%s:%s",
170 is_telnet ? "telnet" : "tcp",
171 left, shost, right, sserv,
172 is_listen ? ",server" : "",
173 left, phost, right, pserv);
174
175 default:
176 return snprintf(dest, max_len, "unknown");
177 }
178 }
179
180 /***********************************************************/
181 /* character device */
182
183 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
184 QTAILQ_HEAD_INITIALIZER(chardevs);
185
186 CharDriverState *qemu_chr_alloc(void)
187 {
188 CharDriverState *chr = g_malloc0(sizeof(CharDriverState));
189 qemu_mutex_init(&chr->chr_write_lock);
190 return chr;
191 }
192
193 void qemu_chr_be_event(CharDriverState *s, int event)
194 {
195 /* Keep track if the char device is open */
196 switch (event) {
197 case CHR_EVENT_OPENED:
198 s->be_open = 1;
199 break;
200 case CHR_EVENT_CLOSED:
201 s->be_open = 0;
202 break;
203 }
204
205 if (!s->chr_event)
206 return;
207 s->chr_event(s->handler_opaque, event);
208 }
209
210 void qemu_chr_be_generic_open(CharDriverState *s)
211 {
212 qemu_chr_be_event(s, CHR_EVENT_OPENED);
213 }
214
215 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
216 {
217 int ret;
218
219 qemu_mutex_lock(&s->chr_write_lock);
220 ret = s->chr_write(s, buf, len);
221 qemu_mutex_unlock(&s->chr_write_lock);
222 return ret;
223 }
224
225 int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len)
226 {
227 int offset = 0;
228 int res = 0;
229
230 qemu_mutex_lock(&s->chr_write_lock);
231 while (offset < len) {
232 do {
233 res = s->chr_write(s, buf + offset, len - offset);
234 if (res == -1 && errno == EAGAIN) {
235 g_usleep(100);
236 }
237 } while (res == -1 && errno == EAGAIN);
238
239 if (res <= 0) {
240 break;
241 }
242
243 offset += res;
244 }
245 qemu_mutex_unlock(&s->chr_write_lock);
246
247 if (res < 0) {
248 return res;
249 }
250 return offset;
251 }
252
253 int qemu_chr_fe_read_all(CharDriverState *s, uint8_t *buf, int len)
254 {
255 int offset = 0, counter = 10;
256 int res;
257
258 if (!s->chr_sync_read) {
259 return 0;
260 }
261
262 while (offset < len) {
263 do {
264 res = s->chr_sync_read(s, buf + offset, len - offset);
265 if (res == -1 && errno == EAGAIN) {
266 g_usleep(100);
267 }
268 } while (res == -1 && errno == EAGAIN);
269
270 if (res == 0) {
271 break;
272 }
273
274 if (res < 0) {
275 return res;
276 }
277
278 offset += res;
279
280 if (!counter--) {
281 break;
282 }
283 }
284
285 return offset;
286 }
287
288 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
289 {
290 if (!s->chr_ioctl)
291 return -ENOTSUP;
292 return s->chr_ioctl(s, cmd, arg);
293 }
294
295 int qemu_chr_be_can_write(CharDriverState *s)
296 {
297 if (!s->chr_can_read)
298 return 0;
299 return s->chr_can_read(s->handler_opaque);
300 }
301
302 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
303 {
304 if (s->chr_read) {
305 s->chr_read(s->handler_opaque, buf, len);
306 }
307 }
308
309 int qemu_chr_fe_get_msgfd(CharDriverState *s)
310 {
311 int fd;
312 return (qemu_chr_fe_get_msgfds(s, &fd, 1) == 1) ? fd : -1;
313 }
314
315 int qemu_chr_fe_get_msgfds(CharDriverState *s, int *fds, int len)
316 {
317 return s->get_msgfds ? s->get_msgfds(s, fds, len) : -1;
318 }
319
320 int qemu_chr_fe_set_msgfds(CharDriverState *s, int *fds, int num)
321 {
322 return s->set_msgfds ? s->set_msgfds(s, fds, num) : -1;
323 }
324
325 int qemu_chr_add_client(CharDriverState *s, int fd)
326 {
327 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
328 }
329
330 void qemu_chr_accept_input(CharDriverState *s)
331 {
332 if (s->chr_accept_input)
333 s->chr_accept_input(s);
334 qemu_notify_event();
335 }
336
337 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
338 {
339 char buf[READ_BUF_LEN];
340 va_list ap;
341 va_start(ap, fmt);
342 vsnprintf(buf, sizeof(buf), fmt, ap);
343 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
344 va_end(ap);
345 }
346
347 static void remove_fd_in_watch(CharDriverState *chr);
348
349 void qemu_chr_add_handlers(CharDriverState *s,
350 IOCanReadHandler *fd_can_read,
351 IOReadHandler *fd_read,
352 IOEventHandler *fd_event,
353 void *opaque)
354 {
355 int fe_open;
356
357 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
358 fe_open = 0;
359 remove_fd_in_watch(s);
360 } else {
361 fe_open = 1;
362 }
363 s->chr_can_read = fd_can_read;
364 s->chr_read = fd_read;
365 s->chr_event = fd_event;
366 s->handler_opaque = opaque;
367 if (fe_open && s->chr_update_read_handler)
368 s->chr_update_read_handler(s);
369
370 if (!s->explicit_fe_open) {
371 qemu_chr_fe_set_open(s, fe_open);
372 }
373
374 /* We're connecting to an already opened device, so let's make sure we
375 also get the open event */
376 if (fe_open && s->be_open) {
377 qemu_chr_be_generic_open(s);
378 }
379 }
380
381 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
382 {
383 return len;
384 }
385
386 static CharDriverState *qemu_chr_open_null(void)
387 {
388 CharDriverState *chr;
389
390 chr = qemu_chr_alloc();
391 chr->chr_write = null_chr_write;
392 chr->explicit_be_open = true;
393 return chr;
394 }
395
396 /* MUX driver for serial I/O splitting */
397 #define MAX_MUX 4
398 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
399 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
400 typedef struct {
401 IOCanReadHandler *chr_can_read[MAX_MUX];
402 IOReadHandler *chr_read[MAX_MUX];
403 IOEventHandler *chr_event[MAX_MUX];
404 void *ext_opaque[MAX_MUX];
405 CharDriverState *drv;
406 int focus;
407 int mux_cnt;
408 int term_got_escape;
409 int max_size;
410 /* Intermediate input buffer allows to catch escape sequences even if the
411 currently active device is not accepting any input - but only until it
412 is full as well. */
413 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
414 int prod[MAX_MUX];
415 int cons[MAX_MUX];
416 int timestamps;
417
418 /* Protected by the CharDriverState chr_write_lock. */
419 int linestart;
420 int64_t timestamps_start;
421 } MuxDriver;
422
423
424 /* Called with chr_write_lock held. */
425 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
426 {
427 MuxDriver *d = chr->opaque;
428 int ret;
429 if (!d->timestamps) {
430 ret = qemu_chr_fe_write(d->drv, buf, len);
431 } else {
432 int i;
433
434 ret = 0;
435 for (i = 0; i < len; i++) {
436 if (d->linestart) {
437 char buf1[64];
438 int64_t ti;
439 int secs;
440
441 ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
442 if (d->timestamps_start == -1)
443 d->timestamps_start = ti;
444 ti -= d->timestamps_start;
445 secs = ti / 1000;
446 snprintf(buf1, sizeof(buf1),
447 "[%02d:%02d:%02d.%03d] ",
448 secs / 3600,
449 (secs / 60) % 60,
450 secs % 60,
451 (int)(ti % 1000));
452 qemu_chr_fe_write(d->drv, (uint8_t *)buf1, strlen(buf1));
453 d->linestart = 0;
454 }
455 ret += qemu_chr_fe_write(d->drv, buf+i, 1);
456 if (buf[i] == '\n') {
457 d->linestart = 1;
458 }
459 }
460 }
461 return ret;
462 }
463
464 static const char * const mux_help[] = {
465 "% h print this help\n\r",
466 "% x exit emulator\n\r",
467 "% s save disk data back to file (if -snapshot)\n\r",
468 "% t toggle console timestamps\n\r",
469 "% b send break (magic sysrq)\n\r",
470 "% c switch between console and monitor\n\r",
471 "% % sends %\n\r",
472 NULL
473 };
474
475 int term_escape_char = 0x01; /* ctrl-a is used for escape */
476 static void mux_print_help(CharDriverState *chr)
477 {
478 int i, j;
479 char ebuf[15] = "Escape-Char";
480 char cbuf[50] = "\n\r";
481
482 if (term_escape_char > 0 && term_escape_char < 26) {
483 snprintf(cbuf, sizeof(cbuf), "\n\r");
484 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
485 } else {
486 snprintf(cbuf, sizeof(cbuf),
487 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
488 term_escape_char);
489 }
490 qemu_chr_fe_write(chr, (uint8_t *)cbuf, strlen(cbuf));
491 for (i = 0; mux_help[i] != NULL; i++) {
492 for (j=0; mux_help[i][j] != '\0'; j++) {
493 if (mux_help[i][j] == '%')
494 qemu_chr_fe_write(chr, (uint8_t *)ebuf, strlen(ebuf));
495 else
496 qemu_chr_fe_write(chr, (uint8_t *)&mux_help[i][j], 1);
497 }
498 }
499 }
500
501 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
502 {
503 if (d->chr_event[mux_nr])
504 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
505 }
506
507 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
508 {
509 if (d->term_got_escape) {
510 d->term_got_escape = 0;
511 if (ch == term_escape_char)
512 goto send_char;
513 switch(ch) {
514 case '?':
515 case 'h':
516 mux_print_help(chr);
517 break;
518 case 'x':
519 {
520 const char *term = "QEMU: Terminated\n\r";
521 qemu_chr_fe_write(chr, (uint8_t *)term, strlen(term));
522 exit(0);
523 break;
524 }
525 case 's':
526 bdrv_commit_all();
527 break;
528 case 'b':
529 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
530 break;
531 case 'c':
532 /* Switch to the next registered device */
533 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
534 d->focus++;
535 if (d->focus >= d->mux_cnt)
536 d->focus = 0;
537 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
538 break;
539 case 't':
540 d->timestamps = !d->timestamps;
541 d->timestamps_start = -1;
542 d->linestart = 0;
543 break;
544 }
545 } else if (ch == term_escape_char) {
546 d->term_got_escape = 1;
547 } else {
548 send_char:
549 return 1;
550 }
551 return 0;
552 }
553
554 static void mux_chr_accept_input(CharDriverState *chr)
555 {
556 MuxDriver *d = chr->opaque;
557 int m = d->focus;
558
559 while (d->prod[m] != d->cons[m] &&
560 d->chr_can_read[m] &&
561 d->chr_can_read[m](d->ext_opaque[m])) {
562 d->chr_read[m](d->ext_opaque[m],
563 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
564 }
565 }
566
567 static int mux_chr_can_read(void *opaque)
568 {
569 CharDriverState *chr = opaque;
570 MuxDriver *d = chr->opaque;
571 int m = d->focus;
572
573 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
574 return 1;
575 if (d->chr_can_read[m])
576 return d->chr_can_read[m](d->ext_opaque[m]);
577 return 0;
578 }
579
580 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
581 {
582 CharDriverState *chr = opaque;
583 MuxDriver *d = chr->opaque;
584 int m = d->focus;
585 int i;
586
587 mux_chr_accept_input (opaque);
588
589 for(i = 0; i < size; i++)
590 if (mux_proc_byte(chr, d, buf[i])) {
591 if (d->prod[m] == d->cons[m] &&
592 d->chr_can_read[m] &&
593 d->chr_can_read[m](d->ext_opaque[m]))
594 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
595 else
596 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
597 }
598 }
599
600 static void mux_chr_event(void *opaque, int event)
601 {
602 CharDriverState *chr = opaque;
603 MuxDriver *d = chr->opaque;
604 int i;
605
606 /* Send the event to all registered listeners */
607 for (i = 0; i < d->mux_cnt; i++)
608 mux_chr_send_event(d, i, event);
609 }
610
611 static void mux_chr_update_read_handler(CharDriverState *chr)
612 {
613 MuxDriver *d = chr->opaque;
614
615 if (d->mux_cnt >= MAX_MUX) {
616 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
617 return;
618 }
619 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
620 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
621 d->chr_read[d->mux_cnt] = chr->chr_read;
622 d->chr_event[d->mux_cnt] = chr->chr_event;
623 /* Fix up the real driver with mux routines */
624 if (d->mux_cnt == 0) {
625 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
626 mux_chr_event, chr);
627 }
628 if (d->focus != -1) {
629 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
630 }
631 d->focus = d->mux_cnt;
632 d->mux_cnt++;
633 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
634 }
635
636 static bool muxes_realized;
637
638 /**
639 * Called after processing of default and command-line-specified
640 * chardevs to deliver CHR_EVENT_OPENED events to any FEs attached
641 * to a mux chardev. This is done here to ensure that
642 * output/prompts/banners are only displayed for the FE that has
643 * focus when initial command-line processing/machine init is
644 * completed.
645 *
646 * After this point, any new FE attached to any new or existing
647 * mux will receive CHR_EVENT_OPENED notifications for the BE
648 * immediately.
649 */
650 static void muxes_realize_done(Notifier *notifier, void *unused)
651 {
652 CharDriverState *chr;
653
654 QTAILQ_FOREACH(chr, &chardevs, next) {
655 if (chr->is_mux) {
656 MuxDriver *d = chr->opaque;
657 int i;
658
659 /* send OPENED to all already-attached FEs */
660 for (i = 0; i < d->mux_cnt; i++) {
661 mux_chr_send_event(d, i, CHR_EVENT_OPENED);
662 }
663 /* mark mux as OPENED so any new FEs will immediately receive
664 * OPENED event
665 */
666 qemu_chr_be_generic_open(chr);
667 }
668 }
669 muxes_realized = true;
670 }
671
672 static Notifier muxes_realize_notify = {
673 .notify = muxes_realize_done,
674 };
675
676 static GSource *mux_chr_add_watch(CharDriverState *s, GIOCondition cond)
677 {
678 MuxDriver *d = s->opaque;
679 return d->drv->chr_add_watch(d->drv, cond);
680 }
681
682 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
683 {
684 CharDriverState *chr;
685 MuxDriver *d;
686
687 chr = qemu_chr_alloc();
688 d = g_malloc0(sizeof(MuxDriver));
689
690 chr->opaque = d;
691 d->drv = drv;
692 d->focus = -1;
693 chr->chr_write = mux_chr_write;
694 chr->chr_update_read_handler = mux_chr_update_read_handler;
695 chr->chr_accept_input = mux_chr_accept_input;
696 /* Frontend guest-open / -close notification is not support with muxes */
697 chr->chr_set_fe_open = NULL;
698 if (drv->chr_add_watch) {
699 chr->chr_add_watch = mux_chr_add_watch;
700 }
701 /* only default to opened state if we've realized the initial
702 * set of muxes
703 */
704 chr->explicit_be_open = muxes_realized ? 0 : 1;
705 chr->is_mux = 1;
706
707 return chr;
708 }
709
710
711 #ifdef _WIN32
712 int send_all(int fd, const void *buf, int len1)
713 {
714 int ret, len;
715
716 len = len1;
717 while (len > 0) {
718 ret = send(fd, buf, len, 0);
719 if (ret < 0) {
720 errno = WSAGetLastError();
721 if (errno != WSAEWOULDBLOCK) {
722 return -1;
723 }
724 } else if (ret == 0) {
725 break;
726 } else {
727 buf += ret;
728 len -= ret;
729 }
730 }
731 return len1 - len;
732 }
733
734 #else
735
736 int send_all(int fd, const void *_buf, int len1)
737 {
738 int ret, len;
739 const uint8_t *buf = _buf;
740
741 len = len1;
742 while (len > 0) {
743 ret = write(fd, buf, len);
744 if (ret < 0) {
745 if (errno != EINTR && errno != EAGAIN)
746 return -1;
747 } else if (ret == 0) {
748 break;
749 } else {
750 buf += ret;
751 len -= ret;
752 }
753 }
754 return len1 - len;
755 }
756
757 int recv_all(int fd, void *_buf, int len1, bool single_read)
758 {
759 int ret, len;
760 uint8_t *buf = _buf;
761
762 len = len1;
763 while ((len > 0) && (ret = read(fd, buf, len)) != 0) {
764 if (ret < 0) {
765 if (errno != EINTR && errno != EAGAIN) {
766 return -1;
767 }
768 continue;
769 } else {
770 if (single_read) {
771 return ret;
772 }
773 buf += ret;
774 len -= ret;
775 }
776 }
777 return len1 - len;
778 }
779
780 #endif /* !_WIN32 */
781
782 typedef struct IOWatchPoll
783 {
784 GSource parent;
785
786 GIOChannel *channel;
787 GSource *src;
788
789 IOCanReadHandler *fd_can_read;
790 GSourceFunc fd_read;
791 void *opaque;
792 } IOWatchPoll;
793
794 static IOWatchPoll *io_watch_poll_from_source(GSource *source)
795 {
796 return container_of(source, IOWatchPoll, parent);
797 }
798
799 static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_)
800 {
801 IOWatchPoll *iwp = io_watch_poll_from_source(source);
802 bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
803 bool was_active = iwp->src != NULL;
804 if (was_active == now_active) {
805 return FALSE;
806 }
807
808 if (now_active) {
809 iwp->src = g_io_create_watch(iwp->channel, G_IO_IN | G_IO_ERR | G_IO_HUP);
810 g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
811 g_source_attach(iwp->src, NULL);
812 } else {
813 g_source_destroy(iwp->src);
814 g_source_unref(iwp->src);
815 iwp->src = NULL;
816 }
817 return FALSE;
818 }
819
820 static gboolean io_watch_poll_check(GSource *source)
821 {
822 return FALSE;
823 }
824
825 static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
826 gpointer user_data)
827 {
828 abort();
829 }
830
831 static void io_watch_poll_finalize(GSource *source)
832 {
833 /* Due to a glib bug, removing the last reference to a source
834 * inside a finalize callback causes recursive locking (and a
835 * deadlock). This is not a problem inside other callbacks,
836 * including dispatch callbacks, so we call io_remove_watch_poll
837 * to remove this source. At this point, iwp->src must
838 * be NULL, or we would leak it.
839 *
840 * This would be solved much more elegantly by child sources,
841 * but we support older glib versions that do not have them.
842 */
843 IOWatchPoll *iwp = io_watch_poll_from_source(source);
844 assert(iwp->src == NULL);
845 }
846
847 static GSourceFuncs io_watch_poll_funcs = {
848 .prepare = io_watch_poll_prepare,
849 .check = io_watch_poll_check,
850 .dispatch = io_watch_poll_dispatch,
851 .finalize = io_watch_poll_finalize,
852 };
853
854 /* Can only be used for read */
855 static guint io_add_watch_poll(GIOChannel *channel,
856 IOCanReadHandler *fd_can_read,
857 GIOFunc fd_read,
858 gpointer user_data)
859 {
860 IOWatchPoll *iwp;
861 int tag;
862
863 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll));
864 iwp->fd_can_read = fd_can_read;
865 iwp->opaque = user_data;
866 iwp->channel = channel;
867 iwp->fd_read = (GSourceFunc) fd_read;
868 iwp->src = NULL;
869
870 tag = g_source_attach(&iwp->parent, NULL);
871 g_source_unref(&iwp->parent);
872 return tag;
873 }
874
875 static void io_remove_watch_poll(guint tag)
876 {
877 GSource *source;
878 IOWatchPoll *iwp;
879
880 g_return_if_fail (tag > 0);
881
882 source = g_main_context_find_source_by_id(NULL, tag);
883 g_return_if_fail (source != NULL);
884
885 iwp = io_watch_poll_from_source(source);
886 if (iwp->src) {
887 g_source_destroy(iwp->src);
888 g_source_unref(iwp->src);
889 iwp->src = NULL;
890 }
891 g_source_destroy(&iwp->parent);
892 }
893
894 static void remove_fd_in_watch(CharDriverState *chr)
895 {
896 if (chr->fd_in_tag) {
897 io_remove_watch_poll(chr->fd_in_tag);
898 chr->fd_in_tag = 0;
899 }
900 }
901
902 #ifndef _WIN32
903 static GIOChannel *io_channel_from_fd(int fd)
904 {
905 GIOChannel *chan;
906
907 if (fd == -1) {
908 return NULL;
909 }
910
911 chan = g_io_channel_unix_new(fd);
912
913 g_io_channel_set_encoding(chan, NULL, NULL);
914 g_io_channel_set_buffered(chan, FALSE);
915
916 return chan;
917 }
918 #endif
919
920 static GIOChannel *io_channel_from_socket(int fd)
921 {
922 GIOChannel *chan;
923
924 if (fd == -1) {
925 return NULL;
926 }
927
928 #ifdef _WIN32
929 chan = g_io_channel_win32_new_socket(fd);
930 #else
931 chan = g_io_channel_unix_new(fd);
932 #endif
933
934 g_io_channel_set_encoding(chan, NULL, NULL);
935 g_io_channel_set_buffered(chan, FALSE);
936
937 return chan;
938 }
939
940 static int io_channel_send(GIOChannel *fd, const void *buf, size_t len)
941 {
942 size_t offset = 0;
943 GIOStatus status = G_IO_STATUS_NORMAL;
944
945 while (offset < len && status == G_IO_STATUS_NORMAL) {
946 gsize bytes_written = 0;
947
948 status = g_io_channel_write_chars(fd, buf + offset, len - offset,
949 &bytes_written, NULL);
950 offset += bytes_written;
951 }
952
953 if (offset > 0) {
954 return offset;
955 }
956 switch (status) {
957 case G_IO_STATUS_NORMAL:
958 g_assert(len == 0);
959 return 0;
960 case G_IO_STATUS_AGAIN:
961 errno = EAGAIN;
962 return -1;
963 default:
964 break;
965 }
966 errno = EINVAL;
967 return -1;
968 }
969
970 #ifndef _WIN32
971
972 typedef struct FDCharDriver {
973 CharDriverState *chr;
974 GIOChannel *fd_in, *fd_out;
975 int max_size;
976 } FDCharDriver;
977
978 /* Called with chr_write_lock held. */
979 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
980 {
981 FDCharDriver *s = chr->opaque;
982
983 return io_channel_send(s->fd_out, buf, len);
984 }
985
986 static gboolean fd_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
987 {
988 CharDriverState *chr = opaque;
989 FDCharDriver *s = chr->opaque;
990 int len;
991 uint8_t buf[READ_BUF_LEN];
992 GIOStatus status;
993 gsize bytes_read;
994
995 len = sizeof(buf);
996 if (len > s->max_size) {
997 len = s->max_size;
998 }
999 if (len == 0) {
1000 return TRUE;
1001 }
1002
1003 status = g_io_channel_read_chars(chan, (gchar *)buf,
1004 len, &bytes_read, NULL);
1005 if (status == G_IO_STATUS_EOF) {
1006 remove_fd_in_watch(chr);
1007 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1008 return FALSE;
1009 }
1010 if (status == G_IO_STATUS_NORMAL) {
1011 qemu_chr_be_write(chr, buf, bytes_read);
1012 }
1013
1014 return TRUE;
1015 }
1016
1017 static int fd_chr_read_poll(void *opaque)
1018 {
1019 CharDriverState *chr = opaque;
1020 FDCharDriver *s = chr->opaque;
1021
1022 s->max_size = qemu_chr_be_can_write(chr);
1023 return s->max_size;
1024 }
1025
1026 static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1027 {
1028 FDCharDriver *s = chr->opaque;
1029 return g_io_create_watch(s->fd_out, cond);
1030 }
1031
1032 static void fd_chr_update_read_handler(CharDriverState *chr)
1033 {
1034 FDCharDriver *s = chr->opaque;
1035
1036 remove_fd_in_watch(chr);
1037 if (s->fd_in) {
1038 chr->fd_in_tag = io_add_watch_poll(s->fd_in, fd_chr_read_poll,
1039 fd_chr_read, chr);
1040 }
1041 }
1042
1043 static void fd_chr_close(struct CharDriverState *chr)
1044 {
1045 FDCharDriver *s = chr->opaque;
1046
1047 remove_fd_in_watch(chr);
1048 if (s->fd_in) {
1049 g_io_channel_unref(s->fd_in);
1050 }
1051 if (s->fd_out) {
1052 g_io_channel_unref(s->fd_out);
1053 }
1054
1055 g_free(s);
1056 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1057 }
1058
1059 /* open a character device to a unix fd */
1060 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
1061 {
1062 CharDriverState *chr;
1063 FDCharDriver *s;
1064
1065 chr = qemu_chr_alloc();
1066 s = g_malloc0(sizeof(FDCharDriver));
1067 s->fd_in = io_channel_from_fd(fd_in);
1068 s->fd_out = io_channel_from_fd(fd_out);
1069 qemu_set_nonblock(fd_out);
1070 s->chr = chr;
1071 chr->opaque = s;
1072 chr->chr_add_watch = fd_chr_add_watch;
1073 chr->chr_write = fd_chr_write;
1074 chr->chr_update_read_handler = fd_chr_update_read_handler;
1075 chr->chr_close = fd_chr_close;
1076
1077 return chr;
1078 }
1079
1080 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
1081 {
1082 int fd_in, fd_out;
1083 char filename_in[CHR_MAX_FILENAME_SIZE];
1084 char filename_out[CHR_MAX_FILENAME_SIZE];
1085 const char *filename = opts->device;
1086
1087 if (filename == NULL) {
1088 fprintf(stderr, "chardev: pipe: no filename given\n");
1089 return NULL;
1090 }
1091
1092 snprintf(filename_in, CHR_MAX_FILENAME_SIZE, "%s.in", filename);
1093 snprintf(filename_out, CHR_MAX_FILENAME_SIZE, "%s.out", filename);
1094 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
1095 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
1096 if (fd_in < 0 || fd_out < 0) {
1097 if (fd_in >= 0)
1098 close(fd_in);
1099 if (fd_out >= 0)
1100 close(fd_out);
1101 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
1102 if (fd_in < 0) {
1103 return NULL;
1104 }
1105 }
1106 return qemu_chr_open_fd(fd_in, fd_out);
1107 }
1108
1109 /* init terminal so that we can grab keys */
1110 static struct termios oldtty;
1111 static int old_fd0_flags;
1112 static bool stdio_in_use;
1113 static bool stdio_allow_signal;
1114 static bool stdio_echo_state;
1115
1116 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo);
1117
1118 static void term_exit(void)
1119 {
1120 tcsetattr (0, TCSANOW, &oldtty);
1121 fcntl(0, F_SETFL, old_fd0_flags);
1122 }
1123
1124 static void term_stdio_handler(int sig)
1125 {
1126 /* restore echo after resume from suspend. */
1127 qemu_chr_set_echo_stdio(NULL, stdio_echo_state);
1128 }
1129
1130 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
1131 {
1132 struct termios tty;
1133
1134 stdio_echo_state = echo;
1135 tty = oldtty;
1136 if (!echo) {
1137 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1138 |INLCR|IGNCR|ICRNL|IXON);
1139 tty.c_oflag |= OPOST;
1140 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1141 tty.c_cflag &= ~(CSIZE|PARENB);
1142 tty.c_cflag |= CS8;
1143 tty.c_cc[VMIN] = 1;
1144 tty.c_cc[VTIME] = 0;
1145 }
1146 if (!stdio_allow_signal)
1147 tty.c_lflag &= ~ISIG;
1148
1149 tcsetattr (0, TCSANOW, &tty);
1150 }
1151
1152 static void qemu_chr_close_stdio(struct CharDriverState *chr)
1153 {
1154 term_exit();
1155 fd_chr_close(chr);
1156 }
1157
1158 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
1159 {
1160 CharDriverState *chr;
1161 struct sigaction act;
1162
1163 if (is_daemonized()) {
1164 error_report("cannot use stdio with -daemonize");
1165 return NULL;
1166 }
1167
1168 if (stdio_in_use) {
1169 error_report("cannot use stdio by multiple character devices");
1170 exit(1);
1171 }
1172
1173 stdio_in_use = true;
1174 old_fd0_flags = fcntl(0, F_GETFL);
1175 tcgetattr(0, &oldtty);
1176 qemu_set_nonblock(0);
1177 atexit(term_exit);
1178
1179 memset(&act, 0, sizeof(act));
1180 act.sa_handler = term_stdio_handler;
1181 sigaction(SIGCONT, &act, NULL);
1182
1183 chr = qemu_chr_open_fd(0, 1);
1184 chr->chr_close = qemu_chr_close_stdio;
1185 chr->chr_set_echo = qemu_chr_set_echo_stdio;
1186 if (opts->has_signal) {
1187 stdio_allow_signal = opts->signal;
1188 }
1189 qemu_chr_fe_set_echo(chr, false);
1190
1191 return chr;
1192 }
1193
1194 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1195 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
1196 || defined(__GLIBC__)
1197
1198 #define HAVE_CHARDEV_TTY 1
1199
1200 typedef struct {
1201 GIOChannel *fd;
1202 int read_bytes;
1203
1204 /* Protected by the CharDriverState chr_write_lock. */
1205 int connected;
1206 guint timer_tag;
1207 guint open_tag;
1208 } PtyCharDriver;
1209
1210 static void pty_chr_update_read_handler_locked(CharDriverState *chr);
1211 static void pty_chr_state(CharDriverState *chr, int connected);
1212
1213 static gboolean pty_chr_timer(gpointer opaque)
1214 {
1215 struct CharDriverState *chr = opaque;
1216 PtyCharDriver *s = chr->opaque;
1217
1218 qemu_mutex_lock(&chr->chr_write_lock);
1219 s->timer_tag = 0;
1220 s->open_tag = 0;
1221 if (!s->connected) {
1222 /* Next poll ... */
1223 pty_chr_update_read_handler_locked(chr);
1224 }
1225 qemu_mutex_unlock(&chr->chr_write_lock);
1226 return FALSE;
1227 }
1228
1229 /* Called with chr_write_lock held. */
1230 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1231 {
1232 PtyCharDriver *s = chr->opaque;
1233
1234 if (s->timer_tag) {
1235 g_source_remove(s->timer_tag);
1236 s->timer_tag = 0;
1237 }
1238
1239 if (ms == 1000) {
1240 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1241 } else {
1242 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1243 }
1244 }
1245
1246 /* Called with chr_write_lock held. */
1247 static void pty_chr_update_read_handler_locked(CharDriverState *chr)
1248 {
1249 PtyCharDriver *s = chr->opaque;
1250 GPollFD pfd;
1251
1252 pfd.fd = g_io_channel_unix_get_fd(s->fd);
1253 pfd.events = G_IO_OUT;
1254 pfd.revents = 0;
1255 g_poll(&pfd, 1, 0);
1256 if (pfd.revents & G_IO_HUP) {
1257 pty_chr_state(chr, 0);
1258 } else {
1259 pty_chr_state(chr, 1);
1260 }
1261 }
1262
1263 static void pty_chr_update_read_handler(CharDriverState *chr)
1264 {
1265 qemu_mutex_lock(&chr->chr_write_lock);
1266 pty_chr_update_read_handler_locked(chr);
1267 qemu_mutex_unlock(&chr->chr_write_lock);
1268 }
1269
1270 /* Called with chr_write_lock held. */
1271 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1272 {
1273 PtyCharDriver *s = chr->opaque;
1274
1275 if (!s->connected) {
1276 /* guest sends data, check for (re-)connect */
1277 pty_chr_update_read_handler_locked(chr);
1278 if (!s->connected) {
1279 return 0;
1280 }
1281 }
1282 return io_channel_send(s->fd, buf, len);
1283 }
1284
1285 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1286 {
1287 PtyCharDriver *s = chr->opaque;
1288 if (!s->connected) {
1289 return NULL;
1290 }
1291 return g_io_create_watch(s->fd, cond);
1292 }
1293
1294 static int pty_chr_read_poll(void *opaque)
1295 {
1296 CharDriverState *chr = opaque;
1297 PtyCharDriver *s = chr->opaque;
1298
1299 s->read_bytes = qemu_chr_be_can_write(chr);
1300 return s->read_bytes;
1301 }
1302
1303 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1304 {
1305 CharDriverState *chr = opaque;
1306 PtyCharDriver *s = chr->opaque;
1307 gsize size, len;
1308 uint8_t buf[READ_BUF_LEN];
1309 GIOStatus status;
1310
1311 len = sizeof(buf);
1312 if (len > s->read_bytes)
1313 len = s->read_bytes;
1314 if (len == 0) {
1315 return TRUE;
1316 }
1317 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1318 if (status != G_IO_STATUS_NORMAL) {
1319 pty_chr_state(chr, 0);
1320 return FALSE;
1321 } else {
1322 pty_chr_state(chr, 1);
1323 qemu_chr_be_write(chr, buf, size);
1324 }
1325 return TRUE;
1326 }
1327
1328 static gboolean qemu_chr_be_generic_open_func(gpointer opaque)
1329 {
1330 CharDriverState *chr = opaque;
1331 PtyCharDriver *s = chr->opaque;
1332
1333 s->open_tag = 0;
1334 qemu_chr_be_generic_open(chr);
1335 return FALSE;
1336 }
1337
1338 /* Called with chr_write_lock held. */
1339 static void pty_chr_state(CharDriverState *chr, int connected)
1340 {
1341 PtyCharDriver *s = chr->opaque;
1342
1343 if (!connected) {
1344 if (s->open_tag) {
1345 g_source_remove(s->open_tag);
1346 s->open_tag = 0;
1347 }
1348 remove_fd_in_watch(chr);
1349 s->connected = 0;
1350 /* (re-)connect poll interval for idle guests: once per second.
1351 * We check more frequently in case the guests sends data to
1352 * the virtual device linked to our pty. */
1353 pty_chr_rearm_timer(chr, 1000);
1354 } else {
1355 if (s->timer_tag) {
1356 g_source_remove(s->timer_tag);
1357 s->timer_tag = 0;
1358 }
1359 if (!s->connected) {
1360 g_assert(s->open_tag == 0);
1361 s->connected = 1;
1362 s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, chr);
1363 }
1364 if (!chr->fd_in_tag) {
1365 chr->fd_in_tag = io_add_watch_poll(s->fd, pty_chr_read_poll,
1366 pty_chr_read, chr);
1367 }
1368 }
1369 }
1370
1371 static void pty_chr_close(struct CharDriverState *chr)
1372 {
1373 PtyCharDriver *s = chr->opaque;
1374 int fd;
1375
1376 qemu_mutex_lock(&chr->chr_write_lock);
1377 pty_chr_state(chr, 0);
1378 fd = g_io_channel_unix_get_fd(s->fd);
1379 g_io_channel_unref(s->fd);
1380 close(fd);
1381 if (s->timer_tag) {
1382 g_source_remove(s->timer_tag);
1383 s->timer_tag = 0;
1384 }
1385 qemu_mutex_unlock(&chr->chr_write_lock);
1386 g_free(s);
1387 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1388 }
1389
1390 static CharDriverState *qemu_chr_open_pty(const char *id,
1391 ChardevReturn *ret)
1392 {
1393 CharDriverState *chr;
1394 PtyCharDriver *s;
1395 int master_fd, slave_fd;
1396 char pty_name[PATH_MAX];
1397
1398 master_fd = qemu_openpty_raw(&slave_fd, pty_name);
1399 if (master_fd < 0) {
1400 return NULL;
1401 }
1402
1403 close(slave_fd);
1404 qemu_set_nonblock(master_fd);
1405
1406 chr = qemu_chr_alloc();
1407
1408 chr->filename = g_strdup_printf("pty:%s", pty_name);
1409 ret->pty = g_strdup(pty_name);
1410 ret->has_pty = true;
1411
1412 fprintf(stderr, "char device redirected to %s (label %s)\n",
1413 pty_name, id);
1414
1415 s = g_malloc0(sizeof(PtyCharDriver));
1416 chr->opaque = s;
1417 chr->chr_write = pty_chr_write;
1418 chr->chr_update_read_handler = pty_chr_update_read_handler;
1419 chr->chr_close = pty_chr_close;
1420 chr->chr_add_watch = pty_chr_add_watch;
1421 chr->explicit_be_open = true;
1422
1423 s->fd = io_channel_from_fd(master_fd);
1424 s->timer_tag = 0;
1425
1426 return chr;
1427 }
1428
1429 static void tty_serial_init(int fd, int speed,
1430 int parity, int data_bits, int stop_bits)
1431 {
1432 struct termios tty;
1433 speed_t spd;
1434
1435 #if 0
1436 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1437 speed, parity, data_bits, stop_bits);
1438 #endif
1439 tcgetattr (fd, &tty);
1440
1441 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1442 speed = speed * 10 / 11;
1443 do {
1444 check_speed(50);
1445 check_speed(75);
1446 check_speed(110);
1447 check_speed(134);
1448 check_speed(150);
1449 check_speed(200);
1450 check_speed(300);
1451 check_speed(600);
1452 check_speed(1200);
1453 check_speed(1800);
1454 check_speed(2400);
1455 check_speed(4800);
1456 check_speed(9600);
1457 check_speed(19200);
1458 check_speed(38400);
1459 /* Non-Posix values follow. They may be unsupported on some systems. */
1460 check_speed(57600);
1461 check_speed(115200);
1462 #ifdef B230400
1463 check_speed(230400);
1464 #endif
1465 #ifdef B460800
1466 check_speed(460800);
1467 #endif
1468 #ifdef B500000
1469 check_speed(500000);
1470 #endif
1471 #ifdef B576000
1472 check_speed(576000);
1473 #endif
1474 #ifdef B921600
1475 check_speed(921600);
1476 #endif
1477 #ifdef B1000000
1478 check_speed(1000000);
1479 #endif
1480 #ifdef B1152000
1481 check_speed(1152000);
1482 #endif
1483 #ifdef B1500000
1484 check_speed(1500000);
1485 #endif
1486 #ifdef B2000000
1487 check_speed(2000000);
1488 #endif
1489 #ifdef B2500000
1490 check_speed(2500000);
1491 #endif
1492 #ifdef B3000000
1493 check_speed(3000000);
1494 #endif
1495 #ifdef B3500000
1496 check_speed(3500000);
1497 #endif
1498 #ifdef B4000000
1499 check_speed(4000000);
1500 #endif
1501 spd = B115200;
1502 } while (0);
1503
1504 cfsetispeed(&tty, spd);
1505 cfsetospeed(&tty, spd);
1506
1507 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1508 |INLCR|IGNCR|ICRNL|IXON);
1509 tty.c_oflag |= OPOST;
1510 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1511 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1512 switch(data_bits) {
1513 default:
1514 case 8:
1515 tty.c_cflag |= CS8;
1516 break;
1517 case 7:
1518 tty.c_cflag |= CS7;
1519 break;
1520 case 6:
1521 tty.c_cflag |= CS6;
1522 break;
1523 case 5:
1524 tty.c_cflag |= CS5;
1525 break;
1526 }
1527 switch(parity) {
1528 default:
1529 case 'N':
1530 break;
1531 case 'E':
1532 tty.c_cflag |= PARENB;
1533 break;
1534 case 'O':
1535 tty.c_cflag |= PARENB | PARODD;
1536 break;
1537 }
1538 if (stop_bits == 2)
1539 tty.c_cflag |= CSTOPB;
1540
1541 tcsetattr (fd, TCSANOW, &tty);
1542 }
1543
1544 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1545 {
1546 FDCharDriver *s = chr->opaque;
1547
1548 switch(cmd) {
1549 case CHR_IOCTL_SERIAL_SET_PARAMS:
1550 {
1551 QEMUSerialSetParams *ssp = arg;
1552 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1553 ssp->speed, ssp->parity,
1554 ssp->data_bits, ssp->stop_bits);
1555 }
1556 break;
1557 case CHR_IOCTL_SERIAL_SET_BREAK:
1558 {
1559 int enable = *(int *)arg;
1560 if (enable) {
1561 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1562 }
1563 }
1564 break;
1565 case CHR_IOCTL_SERIAL_GET_TIOCM:
1566 {
1567 int sarg = 0;
1568 int *targ = (int *)arg;
1569 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1570 *targ = 0;
1571 if (sarg & TIOCM_CTS)
1572 *targ |= CHR_TIOCM_CTS;
1573 if (sarg & TIOCM_CAR)
1574 *targ |= CHR_TIOCM_CAR;
1575 if (sarg & TIOCM_DSR)
1576 *targ |= CHR_TIOCM_DSR;
1577 if (sarg & TIOCM_RI)
1578 *targ |= CHR_TIOCM_RI;
1579 if (sarg & TIOCM_DTR)
1580 *targ |= CHR_TIOCM_DTR;
1581 if (sarg & TIOCM_RTS)
1582 *targ |= CHR_TIOCM_RTS;
1583 }
1584 break;
1585 case CHR_IOCTL_SERIAL_SET_TIOCM:
1586 {
1587 int sarg = *(int *)arg;
1588 int targ = 0;
1589 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1590 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1591 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1592 if (sarg & CHR_TIOCM_CTS)
1593 targ |= TIOCM_CTS;
1594 if (sarg & CHR_TIOCM_CAR)
1595 targ |= TIOCM_CAR;
1596 if (sarg & CHR_TIOCM_DSR)
1597 targ |= TIOCM_DSR;
1598 if (sarg & CHR_TIOCM_RI)
1599 targ |= TIOCM_RI;
1600 if (sarg & CHR_TIOCM_DTR)
1601 targ |= TIOCM_DTR;
1602 if (sarg & CHR_TIOCM_RTS)
1603 targ |= TIOCM_RTS;
1604 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1605 }
1606 break;
1607 default:
1608 return -ENOTSUP;
1609 }
1610 return 0;
1611 }
1612
1613 static void qemu_chr_close_tty(CharDriverState *chr)
1614 {
1615 FDCharDriver *s = chr->opaque;
1616 int fd = -1;
1617
1618 if (s) {
1619 fd = g_io_channel_unix_get_fd(s->fd_in);
1620 }
1621
1622 fd_chr_close(chr);
1623
1624 if (fd >= 0) {
1625 close(fd);
1626 }
1627 }
1628
1629 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1630 {
1631 CharDriverState *chr;
1632
1633 tty_serial_init(fd, 115200, 'N', 8, 1);
1634 chr = qemu_chr_open_fd(fd, fd);
1635 chr->chr_ioctl = tty_serial_ioctl;
1636 chr->chr_close = qemu_chr_close_tty;
1637 return chr;
1638 }
1639 #endif /* __linux__ || __sun__ */
1640
1641 #if defined(__linux__)
1642
1643 #define HAVE_CHARDEV_PARPORT 1
1644
1645 typedef struct {
1646 int fd;
1647 int mode;
1648 } ParallelCharDriver;
1649
1650 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1651 {
1652 if (s->mode != mode) {
1653 int m = mode;
1654 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1655 return 0;
1656 s->mode = mode;
1657 }
1658 return 1;
1659 }
1660
1661 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1662 {
1663 ParallelCharDriver *drv = chr->opaque;
1664 int fd = drv->fd;
1665 uint8_t b;
1666
1667 switch(cmd) {
1668 case CHR_IOCTL_PP_READ_DATA:
1669 if (ioctl(fd, PPRDATA, &b) < 0)
1670 return -ENOTSUP;
1671 *(uint8_t *)arg = b;
1672 break;
1673 case CHR_IOCTL_PP_WRITE_DATA:
1674 b = *(uint8_t *)arg;
1675 if (ioctl(fd, PPWDATA, &b) < 0)
1676 return -ENOTSUP;
1677 break;
1678 case CHR_IOCTL_PP_READ_CONTROL:
1679 if (ioctl(fd, PPRCONTROL, &b) < 0)
1680 return -ENOTSUP;
1681 /* Linux gives only the lowest bits, and no way to know data
1682 direction! For better compatibility set the fixed upper
1683 bits. */
1684 *(uint8_t *)arg = b | 0xc0;
1685 break;
1686 case CHR_IOCTL_PP_WRITE_CONTROL:
1687 b = *(uint8_t *)arg;
1688 if (ioctl(fd, PPWCONTROL, &b) < 0)
1689 return -ENOTSUP;
1690 break;
1691 case CHR_IOCTL_PP_READ_STATUS:
1692 if (ioctl(fd, PPRSTATUS, &b) < 0)
1693 return -ENOTSUP;
1694 *(uint8_t *)arg = b;
1695 break;
1696 case CHR_IOCTL_PP_DATA_DIR:
1697 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1698 return -ENOTSUP;
1699 break;
1700 case CHR_IOCTL_PP_EPP_READ_ADDR:
1701 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1702 struct ParallelIOArg *parg = arg;
1703 int n = read(fd, parg->buffer, parg->count);
1704 if (n != parg->count) {
1705 return -EIO;
1706 }
1707 }
1708 break;
1709 case CHR_IOCTL_PP_EPP_READ:
1710 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1711 struct ParallelIOArg *parg = arg;
1712 int n = read(fd, parg->buffer, parg->count);
1713 if (n != parg->count) {
1714 return -EIO;
1715 }
1716 }
1717 break;
1718 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1719 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1720 struct ParallelIOArg *parg = arg;
1721 int n = write(fd, parg->buffer, parg->count);
1722 if (n != parg->count) {
1723 return -EIO;
1724 }
1725 }
1726 break;
1727 case CHR_IOCTL_PP_EPP_WRITE:
1728 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1729 struct ParallelIOArg *parg = arg;
1730 int n = write(fd, parg->buffer, parg->count);
1731 if (n != parg->count) {
1732 return -EIO;
1733 }
1734 }
1735 break;
1736 default:
1737 return -ENOTSUP;
1738 }
1739 return 0;
1740 }
1741
1742 static void pp_close(CharDriverState *chr)
1743 {
1744 ParallelCharDriver *drv = chr->opaque;
1745 int fd = drv->fd;
1746
1747 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1748 ioctl(fd, PPRELEASE);
1749 close(fd);
1750 g_free(drv);
1751 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1752 }
1753
1754 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1755 {
1756 CharDriverState *chr;
1757 ParallelCharDriver *drv;
1758
1759 if (ioctl(fd, PPCLAIM) < 0) {
1760 close(fd);
1761 return NULL;
1762 }
1763
1764 drv = g_malloc0(sizeof(ParallelCharDriver));
1765 drv->fd = fd;
1766 drv->mode = IEEE1284_MODE_COMPAT;
1767
1768 chr = qemu_chr_alloc();
1769 chr->chr_write = null_chr_write;
1770 chr->chr_ioctl = pp_ioctl;
1771 chr->chr_close = pp_close;
1772 chr->opaque = drv;
1773
1774 return chr;
1775 }
1776 #endif /* __linux__ */
1777
1778 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1779
1780 #define HAVE_CHARDEV_PARPORT 1
1781
1782 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1783 {
1784 int fd = (int)(intptr_t)chr->opaque;
1785 uint8_t b;
1786
1787 switch(cmd) {
1788 case CHR_IOCTL_PP_READ_DATA:
1789 if (ioctl(fd, PPIGDATA, &b) < 0)
1790 return -ENOTSUP;
1791 *(uint8_t *)arg = b;
1792 break;
1793 case CHR_IOCTL_PP_WRITE_DATA:
1794 b = *(uint8_t *)arg;
1795 if (ioctl(fd, PPISDATA, &b) < 0)
1796 return -ENOTSUP;
1797 break;
1798 case CHR_IOCTL_PP_READ_CONTROL:
1799 if (ioctl(fd, PPIGCTRL, &b) < 0)
1800 return -ENOTSUP;
1801 *(uint8_t *)arg = b;
1802 break;
1803 case CHR_IOCTL_PP_WRITE_CONTROL:
1804 b = *(uint8_t *)arg;
1805 if (ioctl(fd, PPISCTRL, &b) < 0)
1806 return -ENOTSUP;
1807 break;
1808 case CHR_IOCTL_PP_READ_STATUS:
1809 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1810 return -ENOTSUP;
1811 *(uint8_t *)arg = b;
1812 break;
1813 default:
1814 return -ENOTSUP;
1815 }
1816 return 0;
1817 }
1818
1819 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1820 {
1821 CharDriverState *chr;
1822
1823 chr = qemu_chr_alloc();
1824 chr->opaque = (void *)(intptr_t)fd;
1825 chr->chr_write = null_chr_write;
1826 chr->chr_ioctl = pp_ioctl;
1827 chr->explicit_be_open = true;
1828 return chr;
1829 }
1830 #endif
1831
1832 #else /* _WIN32 */
1833
1834 typedef struct {
1835 int max_size;
1836 HANDLE hcom, hrecv, hsend;
1837 OVERLAPPED orecv;
1838 BOOL fpipe;
1839 DWORD len;
1840
1841 /* Protected by the CharDriverState chr_write_lock. */
1842 OVERLAPPED osend;
1843 } WinCharState;
1844
1845 typedef struct {
1846 HANDLE hStdIn;
1847 HANDLE hInputReadyEvent;
1848 HANDLE hInputDoneEvent;
1849 HANDLE hInputThread;
1850 uint8_t win_stdio_buf;
1851 } WinStdioCharState;
1852
1853 #define NSENDBUF 2048
1854 #define NRECVBUF 2048
1855 #define MAXCONNECT 1
1856 #define NTIMEOUT 5000
1857
1858 static int win_chr_poll(void *opaque);
1859 static int win_chr_pipe_poll(void *opaque);
1860
1861 static void win_chr_close(CharDriverState *chr)
1862 {
1863 WinCharState *s = chr->opaque;
1864
1865 if (s->hsend) {
1866 CloseHandle(s->hsend);
1867 s->hsend = NULL;
1868 }
1869 if (s->hrecv) {
1870 CloseHandle(s->hrecv);
1871 s->hrecv = NULL;
1872 }
1873 if (s->hcom) {
1874 CloseHandle(s->hcom);
1875 s->hcom = NULL;
1876 }
1877 if (s->fpipe)
1878 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1879 else
1880 qemu_del_polling_cb(win_chr_poll, chr);
1881
1882 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1883 }
1884
1885 static int win_chr_init(CharDriverState *chr, const char *filename)
1886 {
1887 WinCharState *s = chr->opaque;
1888 COMMCONFIG comcfg;
1889 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1890 COMSTAT comstat;
1891 DWORD size;
1892 DWORD err;
1893
1894 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1895 if (!s->hsend) {
1896 fprintf(stderr, "Failed CreateEvent\n");
1897 goto fail;
1898 }
1899 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1900 if (!s->hrecv) {
1901 fprintf(stderr, "Failed CreateEvent\n");
1902 goto fail;
1903 }
1904
1905 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1906 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1907 if (s->hcom == INVALID_HANDLE_VALUE) {
1908 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1909 s->hcom = NULL;
1910 goto fail;
1911 }
1912
1913 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1914 fprintf(stderr, "Failed SetupComm\n");
1915 goto fail;
1916 }
1917
1918 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1919 size = sizeof(COMMCONFIG);
1920 GetDefaultCommConfig(filename, &comcfg, &size);
1921 comcfg.dcb.DCBlength = sizeof(DCB);
1922 CommConfigDialog(filename, NULL, &comcfg);
1923
1924 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1925 fprintf(stderr, "Failed SetCommState\n");
1926 goto fail;
1927 }
1928
1929 if (!SetCommMask(s->hcom, EV_ERR)) {
1930 fprintf(stderr, "Failed SetCommMask\n");
1931 goto fail;
1932 }
1933
1934 cto.ReadIntervalTimeout = MAXDWORD;
1935 if (!SetCommTimeouts(s->hcom, &cto)) {
1936 fprintf(stderr, "Failed SetCommTimeouts\n");
1937 goto fail;
1938 }
1939
1940 if (!ClearCommError(s->hcom, &err, &comstat)) {
1941 fprintf(stderr, "Failed ClearCommError\n");
1942 goto fail;
1943 }
1944 qemu_add_polling_cb(win_chr_poll, chr);
1945 return 0;
1946
1947 fail:
1948 win_chr_close(chr);
1949 return -1;
1950 }
1951
1952 /* Called with chr_write_lock held. */
1953 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1954 {
1955 WinCharState *s = chr->opaque;
1956 DWORD len, ret, size, err;
1957
1958 len = len1;
1959 ZeroMemory(&s->osend, sizeof(s->osend));
1960 s->osend.hEvent = s->hsend;
1961 while (len > 0) {
1962 if (s->hsend)
1963 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1964 else
1965 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1966 if (!ret) {
1967 err = GetLastError();
1968 if (err == ERROR_IO_PENDING) {
1969 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1970 if (ret) {
1971 buf += size;
1972 len -= size;
1973 } else {
1974 break;
1975 }
1976 } else {
1977 break;
1978 }
1979 } else {
1980 buf += size;
1981 len -= size;
1982 }
1983 }
1984 return len1 - len;
1985 }
1986
1987 static int win_chr_read_poll(CharDriverState *chr)
1988 {
1989 WinCharState *s = chr->opaque;
1990
1991 s->max_size = qemu_chr_be_can_write(chr);
1992 return s->max_size;
1993 }
1994
1995 static void win_chr_readfile(CharDriverState *chr)
1996 {
1997 WinCharState *s = chr->opaque;
1998 int ret, err;
1999 uint8_t buf[READ_BUF_LEN];
2000 DWORD size;
2001
2002 ZeroMemory(&s->orecv, sizeof(s->orecv));
2003 s->orecv.hEvent = s->hrecv;
2004 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
2005 if (!ret) {
2006 err = GetLastError();
2007 if (err == ERROR_IO_PENDING) {
2008 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
2009 }
2010 }
2011
2012 if (size > 0) {
2013 qemu_chr_be_write(chr, buf, size);
2014 }
2015 }
2016
2017 static void win_chr_read(CharDriverState *chr)
2018 {
2019 WinCharState *s = chr->opaque;
2020
2021 if (s->len > s->max_size)
2022 s->len = s->max_size;
2023 if (s->len == 0)
2024 return;
2025
2026 win_chr_readfile(chr);
2027 }
2028
2029 static int win_chr_poll(void *opaque)
2030 {
2031 CharDriverState *chr = opaque;
2032 WinCharState *s = chr->opaque;
2033 COMSTAT status;
2034 DWORD comerr;
2035
2036 ClearCommError(s->hcom, &comerr, &status);
2037 if (status.cbInQue > 0) {
2038 s->len = status.cbInQue;
2039 win_chr_read_poll(chr);
2040 win_chr_read(chr);
2041 return 1;
2042 }
2043 return 0;
2044 }
2045
2046 static CharDriverState *qemu_chr_open_win_path(const char *filename)
2047 {
2048 CharDriverState *chr;
2049 WinCharState *s;
2050
2051 chr = qemu_chr_alloc();
2052 s = g_malloc0(sizeof(WinCharState));
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) < 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 {
2083 WinCharState *s = chr->opaque;
2084 OVERLAPPED ov;
2085 int ret;
2086 DWORD size;
2087 char openname[CHR_MAX_FILENAME_SIZE];
2088
2089 s->fpipe = TRUE;
2090
2091 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
2092 if (!s->hsend) {
2093 fprintf(stderr, "Failed CreateEvent\n");
2094 goto fail;
2095 }
2096 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
2097 if (!s->hrecv) {
2098 fprintf(stderr, "Failed CreateEvent\n");
2099 goto fail;
2100 }
2101
2102 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
2103 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
2104 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
2105 PIPE_WAIT,
2106 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
2107 if (s->hcom == INVALID_HANDLE_VALUE) {
2108 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
2109 s->hcom = NULL;
2110 goto fail;
2111 }
2112
2113 ZeroMemory(&ov, sizeof(ov));
2114 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
2115 ret = ConnectNamedPipe(s->hcom, &ov);
2116 if (ret) {
2117 fprintf(stderr, "Failed ConnectNamedPipe\n");
2118 goto fail;
2119 }
2120
2121 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
2122 if (!ret) {
2123 fprintf(stderr, "Failed GetOverlappedResult\n");
2124 if (ov.hEvent) {
2125 CloseHandle(ov.hEvent);
2126 ov.hEvent = NULL;
2127 }
2128 goto fail;
2129 }
2130
2131 if (ov.hEvent) {
2132 CloseHandle(ov.hEvent);
2133 ov.hEvent = NULL;
2134 }
2135 qemu_add_polling_cb(win_chr_pipe_poll, chr);
2136 return 0;
2137
2138 fail:
2139 win_chr_close(chr);
2140 return -1;
2141 }
2142
2143
2144 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
2145 {
2146 const char *filename = opts->device;
2147 CharDriverState *chr;
2148 WinCharState *s;
2149
2150 chr = qemu_chr_alloc();
2151 s = g_malloc0(sizeof(WinCharState));
2152 chr->opaque = s;
2153 chr->chr_write = win_chr_write;
2154 chr->chr_close = win_chr_close;
2155
2156 if (win_chr_pipe_init(chr, filename) < 0) {
2157 g_free(s);
2158 g_free(chr);
2159 return NULL;
2160 }
2161 return chr;
2162 }
2163
2164 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
2165 {
2166 CharDriverState *chr;
2167 WinCharState *s;
2168
2169 chr = qemu_chr_alloc();
2170 s = g_malloc0(sizeof(WinCharState));
2171 s->hcom = fd_out;
2172 chr->opaque = s;
2173 chr->chr_write = win_chr_write;
2174 return chr;
2175 }
2176
2177 static CharDriverState *qemu_chr_open_win_con(void)
2178 {
2179 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
2180 }
2181
2182 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
2183 {
2184 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
2185 DWORD dwSize;
2186 int len1;
2187
2188 len1 = len;
2189
2190 while (len1 > 0) {
2191 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
2192 break;
2193 }
2194 buf += dwSize;
2195 len1 -= dwSize;
2196 }
2197
2198 return len - len1;
2199 }
2200
2201 static void win_stdio_wait_func(void *opaque)
2202 {
2203 CharDriverState *chr = opaque;
2204 WinStdioCharState *stdio = chr->opaque;
2205 INPUT_RECORD buf[4];
2206 int ret;
2207 DWORD dwSize;
2208 int i;
2209
2210 ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize);
2211
2212 if (!ret) {
2213 /* Avoid error storm */
2214 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2215 return;
2216 }
2217
2218 for (i = 0; i < dwSize; i++) {
2219 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2220
2221 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2222 int j;
2223 if (kev->uChar.AsciiChar != 0) {
2224 for (j = 0; j < kev->wRepeatCount; j++) {
2225 if (qemu_chr_be_can_write(chr)) {
2226 uint8_t c = kev->uChar.AsciiChar;
2227 qemu_chr_be_write(chr, &c, 1);
2228 }
2229 }
2230 }
2231 }
2232 }
2233 }
2234
2235 static DWORD WINAPI win_stdio_thread(LPVOID param)
2236 {
2237 CharDriverState *chr = param;
2238 WinStdioCharState *stdio = chr->opaque;
2239 int ret;
2240 DWORD dwSize;
2241
2242 while (1) {
2243
2244 /* Wait for one byte */
2245 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2246
2247 /* Exit in case of error, continue if nothing read */
2248 if (!ret) {
2249 break;
2250 }
2251 if (!dwSize) {
2252 continue;
2253 }
2254
2255 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2256 if (stdio->win_stdio_buf == '\r') {
2257 continue;
2258 }
2259
2260 /* Signal the main thread and wait until the byte was eaten */
2261 if (!SetEvent(stdio->hInputReadyEvent)) {
2262 break;
2263 }
2264 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2265 != WAIT_OBJECT_0) {
2266 break;
2267 }
2268 }
2269
2270 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2271 return 0;
2272 }
2273
2274 static void win_stdio_thread_wait_func(void *opaque)
2275 {
2276 CharDriverState *chr = opaque;
2277 WinStdioCharState *stdio = chr->opaque;
2278
2279 if (qemu_chr_be_can_write(chr)) {
2280 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2281 }
2282
2283 SetEvent(stdio->hInputDoneEvent);
2284 }
2285
2286 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2287 {
2288 WinStdioCharState *stdio = chr->opaque;
2289 DWORD dwMode = 0;
2290
2291 GetConsoleMode(stdio->hStdIn, &dwMode);
2292
2293 if (echo) {
2294 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2295 } else {
2296 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2297 }
2298 }
2299
2300 static void win_stdio_close(CharDriverState *chr)
2301 {
2302 WinStdioCharState *stdio = chr->opaque;
2303
2304 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2305 CloseHandle(stdio->hInputReadyEvent);
2306 }
2307 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2308 CloseHandle(stdio->hInputDoneEvent);
2309 }
2310 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2311 TerminateThread(stdio->hInputThread, 0);
2312 }
2313
2314 g_free(chr->opaque);
2315 g_free(chr);
2316 }
2317
2318 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
2319 {
2320 CharDriverState *chr;
2321 WinStdioCharState *stdio;
2322 DWORD dwMode;
2323 int is_console = 0;
2324
2325 chr = qemu_chr_alloc();
2326 stdio = g_malloc0(sizeof(WinStdioCharState));
2327
2328 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2329 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2330 fprintf(stderr, "cannot open stdio: invalid handle\n");
2331 exit(1);
2332 }
2333
2334 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2335
2336 chr->opaque = stdio;
2337 chr->chr_write = win_stdio_write;
2338 chr->chr_close = win_stdio_close;
2339
2340 if (is_console) {
2341 if (qemu_add_wait_object(stdio->hStdIn,
2342 win_stdio_wait_func, chr)) {
2343 fprintf(stderr, "qemu_add_wait_object: failed\n");
2344 }
2345 } else {
2346 DWORD dwId;
2347
2348 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2349 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2350 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2351 chr, 0, &dwId);
2352
2353 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2354 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2355 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2356 fprintf(stderr, "cannot create stdio thread or event\n");
2357 exit(1);
2358 }
2359 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2360 win_stdio_thread_wait_func, chr)) {
2361 fprintf(stderr, "qemu_add_wait_object: failed\n");
2362 }
2363 }
2364
2365 dwMode |= ENABLE_LINE_INPUT;
2366
2367 if (is_console) {
2368 /* set the terminal in raw mode */
2369 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2370 dwMode |= ENABLE_PROCESSED_INPUT;
2371 }
2372
2373 SetConsoleMode(stdio->hStdIn, dwMode);
2374
2375 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2376 qemu_chr_fe_set_echo(chr, false);
2377
2378 return chr;
2379 }
2380 #endif /* !_WIN32 */
2381
2382
2383 /***********************************************************/
2384 /* UDP Net console */
2385
2386 typedef struct {
2387 int fd;
2388 GIOChannel *chan;
2389 uint8_t buf[READ_BUF_LEN];
2390 int bufcnt;
2391 int bufptr;
2392 int max_size;
2393 } NetCharDriver;
2394
2395 /* Called with chr_write_lock held. */
2396 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2397 {
2398 NetCharDriver *s = chr->opaque;
2399 gsize bytes_written;
2400 GIOStatus status;
2401
2402 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2403 if (status == G_IO_STATUS_EOF) {
2404 return 0;
2405 } else if (status != G_IO_STATUS_NORMAL) {
2406 return -1;
2407 }
2408
2409 return bytes_written;
2410 }
2411
2412 static int udp_chr_read_poll(void *opaque)
2413 {
2414 CharDriverState *chr = opaque;
2415 NetCharDriver *s = chr->opaque;
2416
2417 s->max_size = qemu_chr_be_can_write(chr);
2418
2419 /* If there were any stray characters in the queue process them
2420 * first
2421 */
2422 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2423 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2424 s->bufptr++;
2425 s->max_size = qemu_chr_be_can_write(chr);
2426 }
2427 return s->max_size;
2428 }
2429
2430 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2431 {
2432 CharDriverState *chr = opaque;
2433 NetCharDriver *s = chr->opaque;
2434 gsize bytes_read = 0;
2435 GIOStatus status;
2436
2437 if (s->max_size == 0) {
2438 return TRUE;
2439 }
2440 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2441 &bytes_read, NULL);
2442 s->bufcnt = bytes_read;
2443 s->bufptr = s->bufcnt;
2444 if (status != G_IO_STATUS_NORMAL) {
2445 remove_fd_in_watch(chr);
2446 return FALSE;
2447 }
2448
2449 s->bufptr = 0;
2450 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2451 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2452 s->bufptr++;
2453 s->max_size = qemu_chr_be_can_write(chr);
2454 }
2455
2456 return TRUE;
2457 }
2458
2459 static void udp_chr_update_read_handler(CharDriverState *chr)
2460 {
2461 NetCharDriver *s = chr->opaque;
2462
2463 remove_fd_in_watch(chr);
2464 if (s->chan) {
2465 chr->fd_in_tag = io_add_watch_poll(s->chan, udp_chr_read_poll,
2466 udp_chr_read, chr);
2467 }
2468 }
2469
2470 static void udp_chr_close(CharDriverState *chr)
2471 {
2472 NetCharDriver *s = chr->opaque;
2473
2474 remove_fd_in_watch(chr);
2475 if (s->chan) {
2476 g_io_channel_unref(s->chan);
2477 closesocket(s->fd);
2478 }
2479 g_free(s);
2480 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2481 }
2482
2483 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2484 {
2485 CharDriverState *chr = NULL;
2486 NetCharDriver *s = NULL;
2487
2488 chr = qemu_chr_alloc();
2489 s = g_malloc0(sizeof(NetCharDriver));
2490
2491 s->fd = fd;
2492 s->chan = io_channel_from_socket(s->fd);
2493 s->bufcnt = 0;
2494 s->bufptr = 0;
2495 chr->opaque = s;
2496 chr->chr_write = udp_chr_write;
2497 chr->chr_update_read_handler = udp_chr_update_read_handler;
2498 chr->chr_close = udp_chr_close;
2499 /* be isn't opened until we get a connection */
2500 chr->explicit_be_open = true;
2501 return chr;
2502 }
2503
2504 /***********************************************************/
2505 /* TCP Net console */
2506
2507 typedef struct {
2508
2509 GIOChannel *chan, *listen_chan;
2510 guint listen_tag;
2511 int fd, listen_fd;
2512 int connected;
2513 int max_size;
2514 int do_telnetopt;
2515 int do_nodelay;
2516 int is_unix;
2517 int *read_msgfds;
2518 int read_msgfds_num;
2519 int *write_msgfds;
2520 int write_msgfds_num;
2521
2522 SocketAddress *addr;
2523 bool is_listen;
2524 bool is_telnet;
2525
2526 guint reconnect_timer;
2527 int64_t reconnect_time;
2528 bool connect_err_reported;
2529 } TCPCharDriver;
2530
2531 static gboolean socket_reconnect_timeout(gpointer opaque);
2532
2533 static void qemu_chr_socket_restart_timer(CharDriverState *chr)
2534 {
2535 TCPCharDriver *s = chr->opaque;
2536 assert(s->connected == 0);
2537 s->reconnect_timer = g_timeout_add_seconds(s->reconnect_time,
2538 socket_reconnect_timeout, chr);
2539 }
2540
2541 static void check_report_connect_error(CharDriverState *chr,
2542 Error *err)
2543 {
2544 TCPCharDriver *s = chr->opaque;
2545
2546 if (!s->connect_err_reported) {
2547 error_report("Unable to connect character device %s: %s",
2548 chr->label, error_get_pretty(err));
2549 s->connect_err_reported = true;
2550 }
2551 qemu_chr_socket_restart_timer(chr);
2552 }
2553
2554 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2555
2556 #ifndef _WIN32
2557 static int unix_send_msgfds(CharDriverState *chr, const uint8_t *buf, int len)
2558 {
2559 TCPCharDriver *s = chr->opaque;
2560 struct msghdr msgh;
2561 struct iovec iov;
2562 int r;
2563
2564 size_t fd_size = s->write_msgfds_num * sizeof(int);
2565 char control[CMSG_SPACE(fd_size)];
2566 struct cmsghdr *cmsg;
2567
2568 memset(&msgh, 0, sizeof(msgh));
2569 memset(control, 0, sizeof(control));
2570
2571 /* set the payload */
2572 iov.iov_base = (uint8_t *) buf;
2573 iov.iov_len = len;
2574
2575 msgh.msg_iov = &iov;
2576 msgh.msg_iovlen = 1;
2577
2578 msgh.msg_control = control;
2579 msgh.msg_controllen = sizeof(control);
2580
2581 cmsg = CMSG_FIRSTHDR(&msgh);
2582
2583 cmsg->cmsg_len = CMSG_LEN(fd_size);
2584 cmsg->cmsg_level = SOL_SOCKET;
2585 cmsg->cmsg_type = SCM_RIGHTS;
2586 memcpy(CMSG_DATA(cmsg), s->write_msgfds, fd_size);
2587
2588 do {
2589 r = sendmsg(s->fd, &msgh, 0);
2590 } while (r < 0 && errno == EINTR);
2591
2592 /* free the written msgfds, no matter what */
2593 if (s->write_msgfds_num) {
2594 g_free(s->write_msgfds);
2595 s->write_msgfds = 0;
2596 s->write_msgfds_num = 0;
2597 }
2598
2599 return r;
2600 }
2601 #endif
2602
2603 /* Called with chr_write_lock held. */
2604 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2605 {
2606 TCPCharDriver *s = chr->opaque;
2607 if (s->connected) {
2608 #ifndef _WIN32
2609 if (s->is_unix && s->write_msgfds_num) {
2610 return unix_send_msgfds(chr, buf, len);
2611 } else
2612 #endif
2613 {
2614 return io_channel_send(s->chan, buf, len);
2615 }
2616 } else {
2617 /* XXX: indicate an error ? */
2618 return len;
2619 }
2620 }
2621
2622 static int tcp_chr_read_poll(void *opaque)
2623 {
2624 CharDriverState *chr = opaque;
2625 TCPCharDriver *s = chr->opaque;
2626 if (!s->connected)
2627 return 0;
2628 s->max_size = qemu_chr_be_can_write(chr);
2629 return s->max_size;
2630 }
2631
2632 #define IAC 255
2633 #define IAC_BREAK 243
2634 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2635 TCPCharDriver *s,
2636 uint8_t *buf, int *size)
2637 {
2638 /* Handle any telnet client's basic IAC options to satisfy char by
2639 * char mode with no echo. All IAC options will be removed from
2640 * the buf and the do_telnetopt variable will be used to track the
2641 * state of the width of the IAC information.
2642 *
2643 * IAC commands come in sets of 3 bytes with the exception of the
2644 * "IAC BREAK" command and the double IAC.
2645 */
2646
2647 int i;
2648 int j = 0;
2649
2650 for (i = 0; i < *size; i++) {
2651 if (s->do_telnetopt > 1) {
2652 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2653 /* Double IAC means send an IAC */
2654 if (j != i)
2655 buf[j] = buf[i];
2656 j++;
2657 s->do_telnetopt = 1;
2658 } else {
2659 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2660 /* Handle IAC break commands by sending a serial break */
2661 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2662 s->do_telnetopt++;
2663 }
2664 s->do_telnetopt++;
2665 }
2666 if (s->do_telnetopt >= 4) {
2667 s->do_telnetopt = 1;
2668 }
2669 } else {
2670 if ((unsigned char)buf[i] == IAC) {
2671 s->do_telnetopt = 2;
2672 } else {
2673 if (j != i)
2674 buf[j] = buf[i];
2675 j++;
2676 }
2677 }
2678 }
2679 *size = j;
2680 }
2681
2682 static int tcp_get_msgfds(CharDriverState *chr, int *fds, int num)
2683 {
2684 TCPCharDriver *s = chr->opaque;
2685 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
2686
2687 assert(num <= TCP_MAX_FDS);
2688
2689 if (to_copy) {
2690 int i;
2691
2692 memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
2693
2694 /* Close unused fds */
2695 for (i = to_copy; i < s->read_msgfds_num; i++) {
2696 close(s->read_msgfds[i]);
2697 }
2698
2699 g_free(s->read_msgfds);
2700 s->read_msgfds = 0;
2701 s->read_msgfds_num = 0;
2702 }
2703
2704 return to_copy;
2705 }
2706
2707 static int tcp_set_msgfds(CharDriverState *chr, int *fds, int num)
2708 {
2709 TCPCharDriver *s = chr->opaque;
2710
2711 /* clear old pending fd array */
2712 if (s->write_msgfds) {
2713 g_free(s->write_msgfds);
2714 }
2715
2716 if (num) {
2717 s->write_msgfds = g_malloc(num * sizeof(int));
2718 memcpy(s->write_msgfds, fds, num * sizeof(int));
2719 }
2720
2721 s->write_msgfds_num = num;
2722
2723 return 0;
2724 }
2725
2726 #ifndef _WIN32
2727 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2728 {
2729 TCPCharDriver *s = chr->opaque;
2730 struct cmsghdr *cmsg;
2731
2732 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2733 int fd_size, i;
2734
2735 if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) ||
2736 cmsg->cmsg_level != SOL_SOCKET ||
2737 cmsg->cmsg_type != SCM_RIGHTS) {
2738 continue;
2739 }
2740
2741 fd_size = cmsg->cmsg_len - CMSG_LEN(0);
2742
2743 if (!fd_size) {
2744 continue;
2745 }
2746
2747 /* close and clean read_msgfds */
2748 for (i = 0; i < s->read_msgfds_num; i++) {
2749 close(s->read_msgfds[i]);
2750 }
2751
2752 if (s->read_msgfds_num) {
2753 g_free(s->read_msgfds);
2754 }
2755
2756 s->read_msgfds_num = fd_size / sizeof(int);
2757 s->read_msgfds = g_malloc(fd_size);
2758 memcpy(s->read_msgfds, CMSG_DATA(cmsg), fd_size);
2759
2760 for (i = 0; i < s->read_msgfds_num; i++) {
2761 int fd = s->read_msgfds[i];
2762 if (fd < 0) {
2763 continue;
2764 }
2765
2766 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2767 qemu_set_block(fd);
2768
2769 #ifndef MSG_CMSG_CLOEXEC
2770 qemu_set_cloexec(fd);
2771 #endif
2772 }
2773 }
2774 }
2775
2776 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2777 {
2778 TCPCharDriver *s = chr->opaque;
2779 struct msghdr msg = { NULL, };
2780 struct iovec iov[1];
2781 union {
2782 struct cmsghdr cmsg;
2783 char control[CMSG_SPACE(sizeof(int) * TCP_MAX_FDS)];
2784 } msg_control;
2785 int flags = 0;
2786 ssize_t ret;
2787
2788 iov[0].iov_base = buf;
2789 iov[0].iov_len = len;
2790
2791 msg.msg_iov = iov;
2792 msg.msg_iovlen = 1;
2793 msg.msg_control = &msg_control;
2794 msg.msg_controllen = sizeof(msg_control);
2795
2796 #ifdef MSG_CMSG_CLOEXEC
2797 flags |= MSG_CMSG_CLOEXEC;
2798 #endif
2799 ret = recvmsg(s->fd, &msg, flags);
2800 if (ret > 0 && s->is_unix) {
2801 unix_process_msgfd(chr, &msg);
2802 }
2803
2804 return ret;
2805 }
2806 #else
2807 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2808 {
2809 TCPCharDriver *s = chr->opaque;
2810 return qemu_recv(s->fd, buf, len, 0);
2811 }
2812 #endif
2813
2814 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2815 {
2816 TCPCharDriver *s = chr->opaque;
2817 return g_io_create_watch(s->chan, cond);
2818 }
2819
2820 static void tcp_chr_disconnect(CharDriverState *chr)
2821 {
2822 TCPCharDriver *s = chr->opaque;
2823
2824 s->connected = 0;
2825 if (s->listen_chan) {
2826 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN,
2827 tcp_chr_accept, chr);
2828 }
2829 remove_fd_in_watch(chr);
2830 g_io_channel_unref(s->chan);
2831 s->chan = NULL;
2832 closesocket(s->fd);
2833 s->fd = -1;
2834 SocketAddress_to_str(chr->filename, CHR_MAX_FILENAME_SIZE,
2835 "disconnected:", s->addr, s->is_listen, s->is_telnet);
2836 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2837 if (s->reconnect_time) {
2838 qemu_chr_socket_restart_timer(chr);
2839 }
2840 }
2841
2842 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2843 {
2844 CharDriverState *chr = opaque;
2845 TCPCharDriver *s = chr->opaque;
2846 uint8_t buf[READ_BUF_LEN];
2847 int len, size;
2848
2849 if (cond & G_IO_HUP) {
2850 /* connection closed */
2851 tcp_chr_disconnect(chr);
2852 return TRUE;
2853 }
2854
2855 if (!s->connected || s->max_size <= 0) {
2856 return TRUE;
2857 }
2858 len = sizeof(buf);
2859 if (len > s->max_size)
2860 len = s->max_size;
2861 size = tcp_chr_recv(chr, (void *)buf, len);
2862 if (size == 0) {
2863 /* connection closed */
2864 tcp_chr_disconnect(chr);
2865 } else if (size > 0) {
2866 if (s->do_telnetopt)
2867 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2868 if (size > 0)
2869 qemu_chr_be_write(chr, buf, size);
2870 }
2871
2872 return TRUE;
2873 }
2874
2875 static int tcp_chr_sync_read(CharDriverState *chr, const uint8_t *buf, int len)
2876 {
2877 TCPCharDriver *s = chr->opaque;
2878 int size;
2879
2880 if (!s->connected) {
2881 return 0;
2882 }
2883
2884 size = tcp_chr_recv(chr, (void *) buf, len);
2885 if (size == 0) {
2886 /* connection closed */
2887 tcp_chr_disconnect(chr);
2888 }
2889
2890 return size;
2891 }
2892
2893 #ifndef _WIN32
2894 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2895 {
2896 CharDriverState *chr = qemu_chr_open_fd(eventfd, eventfd);
2897
2898 if (chr) {
2899 chr->avail_connections = 1;
2900 }
2901
2902 return chr;
2903 }
2904 #endif
2905
2906 static void tcp_chr_connect(void *opaque)
2907 {
2908 CharDriverState *chr = opaque;
2909 TCPCharDriver *s = chr->opaque;
2910 struct sockaddr_storage ss, ps;
2911 socklen_t ss_len = sizeof(ss), ps_len = sizeof(ps);
2912
2913 memset(&ss, 0, ss_len);
2914 if (getsockname(s->fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2915 snprintf(chr->filename, CHR_MAX_FILENAME_SIZE,
2916 "Error in getsockname: %s\n", strerror(errno));
2917 } else if (getpeername(s->fd, (struct sockaddr *) &ps, &ps_len) != 0) {
2918 snprintf(chr->filename, CHR_MAX_FILENAME_SIZE,
2919 "Error in getpeername: %s\n", strerror(errno));
2920 } else {
2921 sockaddr_to_str(chr->filename, CHR_MAX_FILENAME_SIZE,
2922 &ss, ss_len, &ps, ps_len,
2923 s->is_listen, s->is_telnet);
2924 }
2925
2926 s->connected = 1;
2927 if (s->chan) {
2928 chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
2929 tcp_chr_read, chr);
2930 }
2931 qemu_chr_be_generic_open(chr);
2932 }
2933
2934 static void tcp_chr_update_read_handler(CharDriverState *chr)
2935 {
2936 TCPCharDriver *s = chr->opaque;
2937
2938 remove_fd_in_watch(chr);
2939 if (s->chan) {
2940 chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
2941 tcp_chr_read, chr);
2942 }
2943 }
2944
2945 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2946 static void tcp_chr_telnet_init(int fd)
2947 {
2948 char buf[3];
2949 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2950 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2951 send(fd, (char *)buf, 3, 0);
2952 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2953 send(fd, (char *)buf, 3, 0);
2954 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2955 send(fd, (char *)buf, 3, 0);
2956 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2957 send(fd, (char *)buf, 3, 0);
2958 }
2959
2960 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2961 {
2962 TCPCharDriver *s = chr->opaque;
2963 if (s->fd != -1)
2964 return -1;
2965
2966 qemu_set_nonblock(fd);
2967 if (s->do_nodelay)
2968 socket_set_nodelay(fd);
2969 s->fd = fd;
2970 s->chan = io_channel_from_socket(fd);
2971 if (s->listen_tag) {
2972 g_source_remove(s->listen_tag);
2973 s->listen_tag = 0;
2974 }
2975 tcp_chr_connect(chr);
2976
2977 return 0;
2978 }
2979
2980 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
2981 {
2982 CharDriverState *chr = opaque;
2983 TCPCharDriver *s = chr->opaque;
2984 struct sockaddr_in saddr;
2985 #ifndef _WIN32
2986 struct sockaddr_un uaddr;
2987 #endif
2988 struct sockaddr *addr;
2989 socklen_t len;
2990 int fd;
2991
2992 for(;;) {
2993 #ifndef _WIN32
2994 if (s->is_unix) {
2995 len = sizeof(uaddr);
2996 addr = (struct sockaddr *)&uaddr;
2997 } else
2998 #endif
2999 {
3000 len = sizeof(saddr);
3001 addr = (struct sockaddr *)&saddr;
3002 }
3003 fd = qemu_accept(s->listen_fd, addr, &len);
3004 if (fd < 0 && errno != EINTR) {
3005 s->listen_tag = 0;
3006 return FALSE;
3007 } else if (fd >= 0) {
3008 if (s->do_telnetopt)
3009 tcp_chr_telnet_init(fd);
3010 break;
3011 }
3012 }
3013 if (tcp_chr_add_client(chr, fd) < 0)
3014 close(fd);
3015
3016 return TRUE;
3017 }
3018
3019 static void tcp_chr_close(CharDriverState *chr)
3020 {
3021 TCPCharDriver *s = chr->opaque;
3022 int i;
3023
3024 if (s->reconnect_timer) {
3025 g_source_remove(s->reconnect_timer);
3026 s->reconnect_timer = 0;
3027 }
3028 qapi_free_SocketAddress(s->addr);
3029 if (s->fd >= 0) {
3030 remove_fd_in_watch(chr);
3031 if (s->chan) {
3032 g_io_channel_unref(s->chan);
3033 }
3034 closesocket(s->fd);
3035 }
3036 if (s->listen_fd >= 0) {
3037 if (s->listen_tag) {
3038 g_source_remove(s->listen_tag);
3039 s->listen_tag = 0;
3040 }
3041 if (s->listen_chan) {
3042 g_io_channel_unref(s->listen_chan);
3043 }
3044 closesocket(s->listen_fd);
3045 }
3046 if (s->read_msgfds_num) {
3047 for (i = 0; i < s->read_msgfds_num; i++) {
3048 close(s->read_msgfds[i]);
3049 }
3050 g_free(s->read_msgfds);
3051 }
3052 if (s->write_msgfds_num) {
3053 g_free(s->write_msgfds);
3054 }
3055 g_free(s);
3056 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
3057 }
3058
3059 static void qemu_chr_finish_socket_connection(CharDriverState *chr, int fd)
3060 {
3061 TCPCharDriver *s = chr->opaque;
3062
3063 if (s->is_listen) {
3064 s->listen_fd = fd;
3065 s->listen_chan = io_channel_from_socket(s->listen_fd);
3066 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN,
3067 tcp_chr_accept, chr);
3068 } else {
3069 s->connected = 1;
3070 s->fd = fd;
3071 socket_set_nodelay(fd);
3072 s->chan = io_channel_from_socket(s->fd);
3073 tcp_chr_connect(chr);
3074 }
3075 }
3076
3077 static void qemu_chr_socket_connected(int fd, Error *err, void *opaque)
3078 {
3079 CharDriverState *chr = opaque;
3080 TCPCharDriver *s = chr->opaque;
3081
3082 if (fd < 0) {
3083 check_report_connect_error(chr, err);
3084 return;
3085 }
3086
3087 s->connect_err_reported = false;
3088 qemu_chr_finish_socket_connection(chr, fd);
3089 }
3090
3091 static bool qemu_chr_open_socket_fd(CharDriverState *chr, Error **errp)
3092 {
3093 TCPCharDriver *s = chr->opaque;
3094 int fd;
3095
3096 if (s->is_listen) {
3097 fd = socket_listen(s->addr, errp);
3098 } else if (s->reconnect_time) {
3099 fd = socket_connect(s->addr, errp, qemu_chr_socket_connected, chr);
3100 return fd >= 0;
3101 } else {
3102 fd = socket_connect(s->addr, errp, NULL, NULL);
3103 }
3104 if (fd < 0) {
3105 return false;
3106 }
3107
3108 qemu_chr_finish_socket_connection(chr, fd);
3109 return true;
3110 }
3111
3112 /*********************************************************/
3113 /* Ring buffer chardev */
3114
3115 typedef struct {
3116 size_t size;
3117 size_t prod;
3118 size_t cons;
3119 uint8_t *cbuf;
3120 } RingBufCharDriver;
3121
3122 static size_t ringbuf_count(const CharDriverState *chr)
3123 {
3124 const RingBufCharDriver *d = chr->opaque;
3125
3126 return d->prod - d->cons;
3127 }
3128
3129 /* Called with chr_write_lock held. */
3130 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
3131 {
3132 RingBufCharDriver *d = chr->opaque;
3133 int i;
3134
3135 if (!buf || (len < 0)) {
3136 return -1;
3137 }
3138
3139 for (i = 0; i < len; i++ ) {
3140 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
3141 if (d->prod - d->cons > d->size) {
3142 d->cons = d->prod - d->size;
3143 }
3144 }
3145
3146 return 0;
3147 }
3148
3149 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
3150 {
3151 RingBufCharDriver *d = chr->opaque;
3152 int i;
3153
3154 qemu_mutex_lock(&chr->chr_write_lock);
3155 for (i = 0; i < len && d->cons != d->prod; i++) {
3156 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
3157 }
3158 qemu_mutex_unlock(&chr->chr_write_lock);
3159
3160 return i;
3161 }
3162
3163 static void ringbuf_chr_close(struct CharDriverState *chr)
3164 {
3165 RingBufCharDriver *d = chr->opaque;
3166
3167 g_free(d->cbuf);
3168 g_free(d);
3169 chr->opaque = NULL;
3170 }
3171
3172 static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts,
3173 Error **errp)
3174 {
3175 CharDriverState *chr;
3176 RingBufCharDriver *d;
3177
3178 chr = qemu_chr_alloc();
3179 d = g_malloc(sizeof(*d));
3180
3181 d->size = opts->has_size ? opts->size : 65536;
3182
3183 /* The size must be power of 2 */
3184 if (d->size & (d->size - 1)) {
3185 error_setg(errp, "size of ringbuf chardev must be power of two");
3186 goto fail;
3187 }
3188
3189 d->prod = 0;
3190 d->cons = 0;
3191 d->cbuf = g_malloc0(d->size);
3192
3193 chr->opaque = d;
3194 chr->chr_write = ringbuf_chr_write;
3195 chr->chr_close = ringbuf_chr_close;
3196
3197 return chr;
3198
3199 fail:
3200 g_free(d);
3201 g_free(chr);
3202 return NULL;
3203 }
3204
3205 bool chr_is_ringbuf(const CharDriverState *chr)
3206 {
3207 return chr->chr_write == ringbuf_chr_write;
3208 }
3209
3210 void qmp_ringbuf_write(const char *device, const char *data,
3211 bool has_format, enum DataFormat format,
3212 Error **errp)
3213 {
3214 CharDriverState *chr;
3215 const uint8_t *write_data;
3216 int ret;
3217 gsize write_count;
3218
3219 chr = qemu_chr_find(device);
3220 if (!chr) {
3221 error_setg(errp, "Device '%s' not found", device);
3222 return;
3223 }
3224
3225 if (!chr_is_ringbuf(chr)) {
3226 error_setg(errp,"%s is not a ringbuf device", device);
3227 return;
3228 }
3229
3230 if (has_format && (format == DATA_FORMAT_BASE64)) {
3231 write_data = g_base64_decode(data, &write_count);
3232 } else {
3233 write_data = (uint8_t *)data;
3234 write_count = strlen(data);
3235 }
3236
3237 ret = ringbuf_chr_write(chr, write_data, write_count);
3238
3239 if (write_data != (uint8_t *)data) {
3240 g_free((void *)write_data);
3241 }
3242
3243 if (ret < 0) {
3244 error_setg(errp, "Failed to write to device %s", device);
3245 return;
3246 }
3247 }
3248
3249 char *qmp_ringbuf_read(const char *device, int64_t size,
3250 bool has_format, enum DataFormat format,
3251 Error **errp)
3252 {
3253 CharDriverState *chr;
3254 uint8_t *read_data;
3255 size_t count;
3256 char *data;
3257
3258 chr = qemu_chr_find(device);
3259 if (!chr) {
3260 error_setg(errp, "Device '%s' not found", device);
3261 return NULL;
3262 }
3263
3264 if (!chr_is_ringbuf(chr)) {
3265 error_setg(errp,"%s is not a ringbuf device", device);
3266 return NULL;
3267 }
3268
3269 if (size <= 0) {
3270 error_setg(errp, "size must be greater than zero");
3271 return NULL;
3272 }
3273
3274 count = ringbuf_count(chr);
3275 size = size > count ? count : size;
3276 read_data = g_malloc(size + 1);
3277
3278 ringbuf_chr_read(chr, read_data, size);
3279
3280 if (has_format && (format == DATA_FORMAT_BASE64)) {
3281 data = g_base64_encode(read_data, size);
3282 g_free(read_data);
3283 } else {
3284 /*
3285 * FIXME should read only complete, valid UTF-8 characters up
3286 * to @size bytes. Invalid sequences should be replaced by a
3287 * suitable replacement character. Except when (and only
3288 * when) ring buffer lost characters since last read, initial
3289 * continuation characters should be dropped.
3290 */
3291 read_data[size] = 0;
3292 data = (char *)read_data;
3293 }
3294
3295 return data;
3296 }
3297
3298 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
3299 {
3300 char host[65], port[33], width[8], height[8];
3301 int pos;
3302 const char *p;
3303 QemuOpts *opts;
3304 Error *local_err = NULL;
3305
3306 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
3307 if (local_err) {
3308 error_report_err(local_err);
3309 return NULL;
3310 }
3311
3312 if (strstart(filename, "mon:", &p)) {
3313 filename = p;
3314 qemu_opt_set(opts, "mux", "on", &error_abort);
3315 if (strcmp(filename, "stdio") == 0) {
3316 /* Monitor is muxed to stdio: do not exit on Ctrl+C by default
3317 * but pass it to the guest. Handle this only for compat syntax,
3318 * for -chardev syntax we have special option for this.
3319 * This is what -nographic did, redirecting+muxing serial+monitor
3320 * to stdio causing Ctrl+C to be passed to guest. */
3321 qemu_opt_set(opts, "signal", "off", &error_abort);
3322 }
3323 }
3324
3325 if (strcmp(filename, "null") == 0 ||
3326 strcmp(filename, "pty") == 0 ||
3327 strcmp(filename, "msmouse") == 0 ||
3328 strcmp(filename, "braille") == 0 ||
3329 strcmp(filename, "testdev") == 0 ||
3330 strcmp(filename, "stdio") == 0) {
3331 qemu_opt_set(opts, "backend", filename, &error_abort);
3332 return opts;
3333 }
3334 if (strstart(filename, "vc", &p)) {
3335 qemu_opt_set(opts, "backend", "vc", &error_abort);
3336 if (*p == ':') {
3337 if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
3338 /* pixels */
3339 qemu_opt_set(opts, "width", width, &error_abort);
3340 qemu_opt_set(opts, "height", height, &error_abort);
3341 } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
3342 /* chars */
3343 qemu_opt_set(opts, "cols", width, &error_abort);
3344 qemu_opt_set(opts, "rows", height, &error_abort);
3345 } else {
3346 goto fail;
3347 }
3348 }
3349 return opts;
3350 }
3351 if (strcmp(filename, "con:") == 0) {
3352 qemu_opt_set(opts, "backend", "console", &error_abort);
3353 return opts;
3354 }
3355 if (strstart(filename, "COM", NULL)) {
3356 qemu_opt_set(opts, "backend", "serial", &error_abort);
3357 qemu_opt_set(opts, "path", filename, &error_abort);
3358 return opts;
3359 }
3360 if (strstart(filename, "file:", &p)) {
3361 qemu_opt_set(opts, "backend", "file", &error_abort);
3362 qemu_opt_set(opts, "path", p, &error_abort);
3363 return opts;
3364 }
3365 if (strstart(filename, "pipe:", &p)) {
3366 qemu_opt_set(opts, "backend", "pipe", &error_abort);
3367 qemu_opt_set(opts, "path", p, &error_abort);
3368 return opts;
3369 }
3370 if (strstart(filename, "tcp:", &p) ||
3371 strstart(filename, "telnet:", &p)) {
3372 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3373 host[0] = 0;
3374 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3375 goto fail;
3376 }
3377 qemu_opt_set(opts, "backend", "socket", &error_abort);
3378 qemu_opt_set(opts, "host", host, &error_abort);
3379 qemu_opt_set(opts, "port", port, &error_abort);
3380 if (p[pos] == ',') {
3381 qemu_opts_do_parse(opts, p+pos+1, NULL, &local_err);
3382 if (local_err) {
3383 error_report_err(local_err);
3384 goto fail;
3385 }
3386 }
3387 if (strstart(filename, "telnet:", &p))
3388 qemu_opt_set(opts, "telnet", "on", &error_abort);
3389 return opts;
3390 }
3391 if (strstart(filename, "udp:", &p)) {
3392 qemu_opt_set(opts, "backend", "udp", &error_abort);
3393 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3394 host[0] = 0;
3395 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3396 goto fail;
3397 }
3398 }
3399 qemu_opt_set(opts, "host", host, &error_abort);
3400 qemu_opt_set(opts, "port", port, &error_abort);
3401 if (p[pos] == '@') {
3402 p += pos + 1;
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 }
3409 qemu_opt_set(opts, "localaddr", host, &error_abort);
3410 qemu_opt_set(opts, "localport", port, &error_abort);
3411 }
3412 return opts;
3413 }
3414 if (strstart(filename, "unix:", &p)) {
3415 qemu_opt_set(opts, "backend", "socket", &error_abort);
3416 qemu_opts_do_parse(opts, p, "path", &local_err);
3417 if (local_err) {
3418 error_report_err(local_err);
3419 goto fail;
3420 }
3421 return opts;
3422 }
3423 if (strstart(filename, "/dev/parport", NULL) ||
3424 strstart(filename, "/dev/ppi", NULL)) {
3425 qemu_opt_set(opts, "backend", "parport", &error_abort);
3426 qemu_opt_set(opts, "path", filename, &error_abort);
3427 return opts;
3428 }
3429 if (strstart(filename, "/dev/", NULL)) {
3430 qemu_opt_set(opts, "backend", "tty", &error_abort);
3431 qemu_opt_set(opts, "path", filename, &error_abort);
3432 return opts;
3433 }
3434
3435 fail:
3436 qemu_opts_del(opts);
3437 return NULL;
3438 }
3439
3440 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3441 Error **errp)
3442 {
3443 const char *path = qemu_opt_get(opts, "path");
3444
3445 if (path == NULL) {
3446 error_setg(errp, "chardev: file: no filename given");
3447 return;
3448 }
3449 backend->file = g_new0(ChardevFile, 1);
3450 backend->file->out = g_strdup(path);
3451 }
3452
3453 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3454 Error **errp)
3455 {
3456 backend->stdio = g_new0(ChardevStdio, 1);
3457 backend->stdio->has_signal = true;
3458 backend->stdio->signal = qemu_opt_get_bool(opts, "signal", true);
3459 }
3460
3461 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3462 Error **errp)
3463 {
3464 const char *device = qemu_opt_get(opts, "path");
3465
3466 if (device == NULL) {
3467 error_setg(errp, "chardev: serial/tty: no device path given");
3468 return;
3469 }
3470 backend->serial = g_new0(ChardevHostdev, 1);
3471 backend->serial->device = g_strdup(device);
3472 }
3473
3474 static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3475 Error **errp)
3476 {
3477 const char *device = qemu_opt_get(opts, "path");
3478
3479 if (device == NULL) {
3480 error_setg(errp, "chardev: parallel: no device path given");
3481 return;
3482 }
3483 backend->parallel = g_new0(ChardevHostdev, 1);
3484 backend->parallel->device = g_strdup(device);
3485 }
3486
3487 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3488 Error **errp)
3489 {
3490 const char *device = qemu_opt_get(opts, "path");
3491
3492 if (device == NULL) {
3493 error_setg(errp, "chardev: pipe: no device path given");
3494 return;
3495 }
3496 backend->pipe = g_new0(ChardevHostdev, 1);
3497 backend->pipe->device = g_strdup(device);
3498 }
3499
3500 static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3501 Error **errp)
3502 {
3503 int val;
3504
3505 backend->ringbuf = g_new0(ChardevRingbuf, 1);
3506
3507 val = qemu_opt_get_size(opts, "size", 0);
3508 if (val != 0) {
3509 backend->ringbuf->has_size = true;
3510 backend->ringbuf->size = val;
3511 }
3512 }
3513
3514 static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
3515 Error **errp)
3516 {
3517 const char *chardev = qemu_opt_get(opts, "chardev");
3518
3519 if (chardev == NULL) {
3520 error_setg(errp, "chardev: mux: no chardev given");
3521 return;
3522 }
3523 backend->mux = g_new0(ChardevMux, 1);
3524 backend->mux->chardev = g_strdup(chardev);
3525 }
3526
3527 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
3528 Error **errp)
3529 {
3530 bool is_listen = qemu_opt_get_bool(opts, "server", false);
3531 bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true);
3532 bool is_telnet = qemu_opt_get_bool(opts, "telnet", false);
3533 bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true);
3534 int64_t reconnect = qemu_opt_get_number(opts, "reconnect", 0);
3535 const char *path = qemu_opt_get(opts, "path");
3536 const char *host = qemu_opt_get(opts, "host");
3537 const char *port = qemu_opt_get(opts, "port");
3538 SocketAddress *addr;
3539
3540 if (!path) {
3541 if (!host) {
3542 error_setg(errp, "chardev: socket: no host given");
3543 return;
3544 }
3545 if (!port) {
3546 error_setg(errp, "chardev: socket: no port given");
3547 return;
3548 }
3549 }
3550
3551 backend->socket = g_new0(ChardevSocket, 1);
3552
3553 backend->socket->has_nodelay = true;
3554 backend->socket->nodelay = do_nodelay;
3555 backend->socket->has_server = true;
3556 backend->socket->server = is_listen;
3557 backend->socket->has_telnet = true;
3558 backend->socket->telnet = is_telnet;
3559 backend->socket->has_wait = true;
3560 backend->socket->wait = is_waitconnect;
3561 backend->socket->has_reconnect = true;
3562 backend->socket->reconnect = reconnect;
3563
3564 addr = g_new0(SocketAddress, 1);
3565 if (path) {
3566 addr->kind = SOCKET_ADDRESS_KIND_UNIX;
3567 addr->q_unix = g_new0(UnixSocketAddress, 1);
3568 addr->q_unix->path = g_strdup(path);
3569 } else {
3570 addr->kind = SOCKET_ADDRESS_KIND_INET;
3571 addr->inet = g_new0(InetSocketAddress, 1);
3572 addr->inet->host = g_strdup(host);
3573 addr->inet->port = g_strdup(port);
3574 addr->inet->has_to = qemu_opt_get(opts, "to");
3575 addr->inet->to = qemu_opt_get_number(opts, "to", 0);
3576 addr->inet->has_ipv4 = qemu_opt_get(opts, "ipv4");
3577 addr->inet->ipv4 = qemu_opt_get_bool(opts, "ipv4", 0);
3578 addr->inet->has_ipv6 = qemu_opt_get(opts, "ipv6");
3579 addr->inet->ipv6 = qemu_opt_get_bool(opts, "ipv6", 0);
3580 }
3581 backend->socket->addr = addr;
3582 }
3583
3584 static void qemu_chr_parse_udp(QemuOpts *opts, ChardevBackend *backend,
3585 Error **errp)
3586 {
3587 const char *host = qemu_opt_get(opts, "host");
3588 const char *port = qemu_opt_get(opts, "port");
3589 const char *localaddr = qemu_opt_get(opts, "localaddr");
3590 const char *localport = qemu_opt_get(opts, "localport");
3591 bool has_local = false;
3592 SocketAddress *addr;
3593
3594 if (host == NULL || strlen(host) == 0) {
3595 host = "localhost";
3596 }
3597 if (port == NULL || strlen(port) == 0) {
3598 error_setg(errp, "chardev: udp: remote port not specified");
3599 return;
3600 }
3601 if (localport == NULL || strlen(localport) == 0) {
3602 localport = "0";
3603 } else {
3604 has_local = true;
3605 }
3606 if (localaddr == NULL || strlen(localaddr) == 0) {
3607 localaddr = "";
3608 } else {
3609 has_local = true;
3610 }
3611
3612 backend->udp = g_new0(ChardevUdp, 1);
3613
3614 addr = g_new0(SocketAddress, 1);
3615 addr->kind = SOCKET_ADDRESS_KIND_INET;
3616 addr->inet = g_new0(InetSocketAddress, 1);
3617 addr->inet->host = g_strdup(host);
3618 addr->inet->port = g_strdup(port);
3619 addr->inet->has_ipv4 = qemu_opt_get(opts, "ipv4");
3620 addr->inet->ipv4 = qemu_opt_get_bool(opts, "ipv4", 0);
3621 addr->inet->has_ipv6 = qemu_opt_get(opts, "ipv6");
3622 addr->inet->ipv6 = qemu_opt_get_bool(opts, "ipv6", 0);
3623 backend->udp->remote = addr;
3624
3625 if (has_local) {
3626 backend->udp->has_local = true;
3627 addr = g_new0(SocketAddress, 1);
3628 addr->kind = SOCKET_ADDRESS_KIND_INET;
3629 addr->inet = g_new0(InetSocketAddress, 1);
3630 addr->inet->host = g_strdup(localaddr);
3631 addr->inet->port = g_strdup(localport);
3632 backend->udp->local = addr;
3633 }
3634 }
3635
3636 typedef struct CharDriver {
3637 const char *name;
3638 ChardevBackendKind kind;
3639 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
3640 } CharDriver;
3641
3642 static GSList *backends;
3643
3644 void register_char_driver(const char *name, ChardevBackendKind kind,
3645 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp))
3646 {
3647 CharDriver *s;
3648
3649 s = g_malloc0(sizeof(*s));
3650 s->name = g_strdup(name);
3651 s->kind = kind;
3652 s->parse = parse;
3653
3654 backends = g_slist_append(backends, s);
3655 }
3656
3657 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
3658 void (*init)(struct CharDriverState *s),
3659 Error **errp)
3660 {
3661 Error *local_err = NULL;
3662 CharDriver *cd;
3663 CharDriverState *chr;
3664 GSList *i;
3665 ChardevReturn *ret = NULL;
3666 ChardevBackend *backend;
3667 const char *id = qemu_opts_id(opts);
3668 char *bid = NULL;
3669
3670 if (id == NULL) {
3671 error_setg(errp, "chardev: no id specified");
3672 goto err;
3673 }
3674
3675 if (qemu_opt_get(opts, "backend") == NULL) {
3676 error_setg(errp, "chardev: \"%s\" missing backend",
3677 qemu_opts_id(opts));
3678 goto err;
3679 }
3680 for (i = backends; i; i = i->next) {
3681 cd = i->data;
3682
3683 if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) {
3684 break;
3685 }
3686 }
3687 if (i == NULL) {
3688 error_setg(errp, "chardev: backend \"%s\" not found",
3689 qemu_opt_get(opts, "backend"));
3690 goto err;
3691 }
3692
3693 backend = g_new0(ChardevBackend, 1);
3694
3695 if (qemu_opt_get_bool(opts, "mux", 0)) {
3696 bid = g_strdup_printf("%s-base", id);
3697 }
3698
3699 chr = NULL;
3700 backend->kind = cd->kind;
3701 if (cd->parse) {
3702 cd->parse(opts, backend, &local_err);
3703 if (local_err) {
3704 error_propagate(errp, local_err);
3705 goto qapi_out;
3706 }
3707 }
3708 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
3709 if (!ret) {
3710 goto qapi_out;
3711 }
3712
3713 if (bid) {
3714 qapi_free_ChardevBackend(backend);
3715 qapi_free_ChardevReturn(ret);
3716 backend = g_new0(ChardevBackend, 1);
3717 backend->mux = g_new0(ChardevMux, 1);
3718 backend->kind = CHARDEV_BACKEND_KIND_MUX;
3719 backend->mux->chardev = g_strdup(bid);
3720 ret = qmp_chardev_add(id, backend, errp);
3721 if (!ret) {
3722 chr = qemu_chr_find(bid);
3723 qemu_chr_delete(chr);
3724 chr = NULL;
3725 goto qapi_out;
3726 }
3727 }
3728
3729 chr = qemu_chr_find(id);
3730 chr->opts = opts;
3731
3732 qapi_out:
3733 qapi_free_ChardevBackend(backend);
3734 qapi_free_ChardevReturn(ret);
3735 g_free(bid);
3736 return chr;
3737
3738 err:
3739 qemu_opts_del(opts);
3740 return NULL;
3741 }
3742
3743 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
3744 {
3745 const char *p;
3746 CharDriverState *chr;
3747 QemuOpts *opts;
3748 Error *err = NULL;
3749
3750 if (strstart(filename, "chardev:", &p)) {
3751 return qemu_chr_find(p);
3752 }
3753
3754 opts = qemu_chr_parse_compat(label, filename);
3755 if (!opts)
3756 return NULL;
3757
3758 chr = qemu_chr_new_from_opts(opts, init, &err);
3759 if (err) {
3760 error_report_err(err);
3761 }
3762 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
3763 qemu_chr_fe_claim_no_fail(chr);
3764 monitor_init(chr, MONITOR_USE_READLINE);
3765 }
3766 return chr;
3767 }
3768
3769 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
3770 {
3771 if (chr->chr_set_echo) {
3772 chr->chr_set_echo(chr, echo);
3773 }
3774 }
3775
3776 void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open)
3777 {
3778 if (chr->fe_open == fe_open) {
3779 return;
3780 }
3781 chr->fe_open = fe_open;
3782 if (chr->chr_set_fe_open) {
3783 chr->chr_set_fe_open(chr, fe_open);
3784 }
3785 }
3786
3787 void qemu_chr_fe_event(struct CharDriverState *chr, int event)
3788 {
3789 if (chr->chr_fe_event) {
3790 chr->chr_fe_event(chr, event);
3791 }
3792 }
3793
3794 int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
3795 GIOFunc func, void *user_data)
3796 {
3797 GSource *src;
3798 guint tag;
3799
3800 if (s->chr_add_watch == NULL) {
3801 return -ENOSYS;
3802 }
3803
3804 src = s->chr_add_watch(s, cond);
3805 if (!src) {
3806 return -EINVAL;
3807 }
3808
3809 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
3810 tag = g_source_attach(src, NULL);
3811 g_source_unref(src);
3812
3813 return tag;
3814 }
3815
3816 int qemu_chr_fe_claim(CharDriverState *s)
3817 {
3818 if (s->avail_connections < 1) {
3819 return -1;
3820 }
3821 s->avail_connections--;
3822 return 0;
3823 }
3824
3825 void qemu_chr_fe_claim_no_fail(CharDriverState *s)
3826 {
3827 if (qemu_chr_fe_claim(s) != 0) {
3828 fprintf(stderr, "%s: error chardev \"%s\" already used\n",
3829 __func__, s->label);
3830 exit(1);
3831 }
3832 }
3833
3834 void qemu_chr_fe_release(CharDriverState *s)
3835 {
3836 s->avail_connections++;
3837 }
3838
3839 void qemu_chr_delete(CharDriverState *chr)
3840 {
3841 QTAILQ_REMOVE(&chardevs, chr, next);
3842 if (chr->chr_close) {
3843 chr->chr_close(chr);
3844 }
3845 g_free(chr->filename);
3846 g_free(chr->label);
3847 qemu_opts_del(chr->opts);
3848 g_free(chr);
3849 }
3850
3851 ChardevInfoList *qmp_query_chardev(Error **errp)
3852 {
3853 ChardevInfoList *chr_list = NULL;
3854 CharDriverState *chr;
3855
3856 QTAILQ_FOREACH(chr, &chardevs, next) {
3857 ChardevInfoList *info = g_malloc0(sizeof(*info));
3858 info->value = g_malloc0(sizeof(*info->value));
3859 info->value->label = g_strdup(chr->label);
3860 info->value->filename = g_strdup(chr->filename);
3861 info->value->frontend_open = chr->fe_open;
3862
3863 info->next = chr_list;
3864 chr_list = info;
3865 }
3866
3867 return chr_list;
3868 }
3869
3870 ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp)
3871 {
3872 ChardevBackendInfoList *backend_list = NULL;
3873 CharDriver *c = NULL;
3874 GSList *i = NULL;
3875
3876 for (i = backends; i; i = i->next) {
3877 ChardevBackendInfoList *info = g_malloc0(sizeof(*info));
3878 c = i->data;
3879 info->value = g_malloc0(sizeof(*info->value));
3880 info->value->name = g_strdup(c->name);
3881
3882 info->next = backend_list;
3883 backend_list = info;
3884 }
3885
3886 return backend_list;
3887 }
3888
3889 CharDriverState *qemu_chr_find(const char *name)
3890 {
3891 CharDriverState *chr;
3892
3893 QTAILQ_FOREACH(chr, &chardevs, next) {
3894 if (strcmp(chr->label, name) != 0)
3895 continue;
3896 return chr;
3897 }
3898 return NULL;
3899 }
3900
3901 /* Get a character (serial) device interface. */
3902 CharDriverState *qemu_char_get_next_serial(void)
3903 {
3904 static int next_serial;
3905 CharDriverState *chr;
3906
3907 /* FIXME: This function needs to go away: use chardev properties! */
3908
3909 while (next_serial < MAX_SERIAL_PORTS && serial_hds[next_serial]) {
3910 chr = serial_hds[next_serial++];
3911 qemu_chr_fe_claim_no_fail(chr);
3912 return chr;
3913 }
3914 return NULL;
3915 }
3916
3917 QemuOptsList qemu_chardev_opts = {
3918 .name = "chardev",
3919 .implied_opt_name = "backend",
3920 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
3921 .desc = {
3922 {
3923 .name = "backend",
3924 .type = QEMU_OPT_STRING,
3925 },{
3926 .name = "path",
3927 .type = QEMU_OPT_STRING,
3928 },{
3929 .name = "host",
3930 .type = QEMU_OPT_STRING,
3931 },{
3932 .name = "port",
3933 .type = QEMU_OPT_STRING,
3934 },{
3935 .name = "localaddr",
3936 .type = QEMU_OPT_STRING,
3937 },{
3938 .name = "localport",
3939 .type = QEMU_OPT_STRING,
3940 },{
3941 .name = "to",
3942 .type = QEMU_OPT_NUMBER,
3943 },{
3944 .name = "ipv4",
3945 .type = QEMU_OPT_BOOL,
3946 },{
3947 .name = "ipv6",
3948 .type = QEMU_OPT_BOOL,
3949 },{
3950 .name = "wait",
3951 .type = QEMU_OPT_BOOL,
3952 },{
3953 .name = "server",
3954 .type = QEMU_OPT_BOOL,
3955 },{
3956 .name = "delay",
3957 .type = QEMU_OPT_BOOL,
3958 },{
3959 .name = "reconnect",
3960 .type = QEMU_OPT_NUMBER,
3961 },{
3962 .name = "telnet",
3963 .type = QEMU_OPT_BOOL,
3964 },{
3965 .name = "width",
3966 .type = QEMU_OPT_NUMBER,
3967 },{
3968 .name = "height",
3969 .type = QEMU_OPT_NUMBER,
3970 },{
3971 .name = "cols",
3972 .type = QEMU_OPT_NUMBER,
3973 },{
3974 .name = "rows",
3975 .type = QEMU_OPT_NUMBER,
3976 },{
3977 .name = "mux",
3978 .type = QEMU_OPT_BOOL,
3979 },{
3980 .name = "signal",
3981 .type = QEMU_OPT_BOOL,
3982 },{
3983 .name = "name",
3984 .type = QEMU_OPT_STRING,
3985 },{
3986 .name = "debug",
3987 .type = QEMU_OPT_NUMBER,
3988 },{
3989 .name = "size",
3990 .type = QEMU_OPT_SIZE,
3991 },{
3992 .name = "chardev",
3993 .type = QEMU_OPT_STRING,
3994 },
3995 { /* end of list */ }
3996 },
3997 };
3998
3999 #ifdef _WIN32
4000
4001 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
4002 {
4003 HANDLE out;
4004
4005 if (file->has_in) {
4006 error_setg(errp, "input file not supported");
4007 return NULL;
4008 }
4009
4010 out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
4011 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
4012 if (out == INVALID_HANDLE_VALUE) {
4013 error_setg(errp, "open %s failed", file->out);
4014 return NULL;
4015 }
4016 return qemu_chr_open_win_file(out);
4017 }
4018
4019 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
4020 Error **errp)
4021 {
4022 return qemu_chr_open_win_path(serial->device);
4023 }
4024
4025 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
4026 Error **errp)
4027 {
4028 error_setg(errp, "character device backend type 'parallel' not supported");
4029 return NULL;
4030 }
4031
4032 #else /* WIN32 */
4033
4034 static int qmp_chardev_open_file_source(char *src, int flags,
4035 Error **errp)
4036 {
4037 int fd = -1;
4038
4039 TFR(fd = qemu_open(src, flags, 0666));
4040 if (fd == -1) {
4041 error_setg_file_open(errp, errno, src);
4042 }
4043 return fd;
4044 }
4045
4046 static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
4047 {
4048 int flags, in = -1, out;
4049
4050 flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
4051 out = qmp_chardev_open_file_source(file->out, flags, errp);
4052 if (out < 0) {
4053 return NULL;
4054 }
4055
4056 if (file->has_in) {
4057 flags = O_RDONLY;
4058 in = qmp_chardev_open_file_source(file->in, flags, errp);
4059 if (in < 0) {
4060 qemu_close(out);
4061 return NULL;
4062 }
4063 }
4064
4065 return qemu_chr_open_fd(in, out);
4066 }
4067
4068 static CharDriverState *qmp_chardev_open_serial(ChardevHostdev *serial,
4069 Error **errp)
4070 {
4071 #ifdef HAVE_CHARDEV_TTY
4072 int fd;
4073
4074 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
4075 if (fd < 0) {
4076 return NULL;
4077 }
4078 qemu_set_nonblock(fd);
4079 return qemu_chr_open_tty_fd(fd);
4080 #else
4081 error_setg(errp, "character device backend type 'serial' not supported");
4082 return NULL;
4083 #endif
4084 }
4085
4086 static CharDriverState *qmp_chardev_open_parallel(ChardevHostdev *parallel,
4087 Error **errp)
4088 {
4089 #ifdef HAVE_CHARDEV_PARPORT
4090 int fd;
4091
4092 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
4093 if (fd < 0) {
4094 return NULL;
4095 }
4096 return qemu_chr_open_pp_fd(fd);
4097 #else
4098 error_setg(errp, "character device backend type 'parallel' not supported");
4099 return NULL;
4100 #endif
4101 }
4102
4103 #endif /* WIN32 */
4104
4105 static void socket_try_connect(CharDriverState *chr)
4106 {
4107 Error *err = NULL;
4108
4109 if (!qemu_chr_open_socket_fd(chr, &err)) {
4110 check_report_connect_error(chr, err);
4111 }
4112 }
4113
4114 static gboolean socket_reconnect_timeout(gpointer opaque)
4115 {
4116 CharDriverState *chr = opaque;
4117 TCPCharDriver *s = chr->opaque;
4118
4119 s->reconnect_timer = 0;
4120
4121 if (chr->be_open) {
4122 return false;
4123 }
4124
4125 socket_try_connect(chr);
4126
4127 return false;
4128 }
4129
4130 static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
4131 Error **errp)
4132 {
4133 CharDriverState *chr;
4134 TCPCharDriver *s;
4135 SocketAddress *addr = sock->addr;
4136 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
4137 bool is_listen = sock->has_server ? sock->server : true;
4138 bool is_telnet = sock->has_telnet ? sock->telnet : false;
4139 bool is_waitconnect = sock->has_wait ? sock->wait : false;
4140 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0;
4141
4142 chr = qemu_chr_alloc();
4143 s = g_malloc0(sizeof(TCPCharDriver));
4144
4145 s->fd = -1;
4146 s->listen_fd = -1;
4147 s->is_unix = addr->kind == SOCKET_ADDRESS_KIND_UNIX;
4148 s->is_listen = is_listen;
4149 s->is_telnet = is_telnet;
4150 s->do_nodelay = do_nodelay;
4151 qapi_copy_SocketAddress(&s->addr, sock->addr);
4152
4153 chr->opaque = s;
4154 chr->chr_write = tcp_chr_write;
4155 chr->chr_sync_read = tcp_chr_sync_read;
4156 chr->chr_close = tcp_chr_close;
4157 chr->get_msgfds = tcp_get_msgfds;
4158 chr->set_msgfds = tcp_set_msgfds;
4159 chr->chr_add_client = tcp_chr_add_client;
4160 chr->chr_add_watch = tcp_chr_add_watch;
4161 chr->chr_update_read_handler = tcp_chr_update_read_handler;
4162 /* be isn't opened until we get a connection */
4163 chr->explicit_be_open = true;
4164
4165 chr->filename = g_malloc(CHR_MAX_FILENAME_SIZE);
4166 SocketAddress_to_str(chr->filename, CHR_MAX_FILENAME_SIZE, "disconnected:",
4167 addr, is_listen, is_telnet);
4168
4169 if (is_listen) {
4170 if (is_telnet) {
4171 s->do_telnetopt = 1;
4172 }
4173 } else if (reconnect > 0) {
4174 s->reconnect_time = reconnect;
4175 }
4176
4177 if (s->reconnect_time) {
4178 socket_try_connect(chr);
4179 } else if (!qemu_chr_open_socket_fd(chr, errp)) {
4180 g_free(s);
4181 g_free(chr->filename);
4182 g_free(chr);
4183 return NULL;
4184 }
4185
4186 if (is_listen && is_waitconnect) {
4187 fprintf(stderr, "QEMU waiting for connection on: %s\n",
4188 chr->filename);
4189 tcp_chr_accept(s->listen_chan, G_IO_IN, chr);
4190 qemu_set_nonblock(s->listen_fd);
4191 }
4192
4193 return chr;
4194 }
4195
4196 static CharDriverState *qmp_chardev_open_udp(ChardevUdp *udp,
4197 Error **errp)
4198 {
4199 int fd;
4200
4201 fd = socket_dgram(udp->remote, udp->local, errp);
4202 if (fd < 0) {
4203 return NULL;
4204 }
4205 return qemu_chr_open_udp_fd(fd);
4206 }
4207
4208 ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
4209 Error **errp)
4210 {
4211 ChardevReturn *ret = g_new0(ChardevReturn, 1);
4212 CharDriverState *base, *chr = NULL;
4213
4214 chr = qemu_chr_find(id);
4215 if (chr) {
4216 error_setg(errp, "Chardev '%s' already exists", id);
4217 g_free(ret);
4218 return NULL;
4219 }
4220
4221 switch (backend->kind) {
4222 case CHARDEV_BACKEND_KIND_FILE:
4223 chr = qmp_chardev_open_file(backend->file, errp);
4224 break;
4225 case CHARDEV_BACKEND_KIND_SERIAL:
4226 chr = qmp_chardev_open_serial(backend->serial, errp);
4227 break;
4228 case CHARDEV_BACKEND_KIND_PARALLEL:
4229 chr = qmp_chardev_open_parallel(backend->parallel, errp);
4230 break;
4231 case CHARDEV_BACKEND_KIND_PIPE:
4232 chr = qemu_chr_open_pipe(backend->pipe);
4233 break;
4234 case CHARDEV_BACKEND_KIND_SOCKET:
4235 chr = qmp_chardev_open_socket(backend->socket, errp);
4236 break;
4237 case CHARDEV_BACKEND_KIND_UDP:
4238 chr = qmp_chardev_open_udp(backend->udp, errp);
4239 break;
4240 #ifdef HAVE_CHARDEV_TTY
4241 case CHARDEV_BACKEND_KIND_PTY:
4242 chr = qemu_chr_open_pty(id, ret);
4243 break;
4244 #endif
4245 case CHARDEV_BACKEND_KIND_NULL:
4246 chr = qemu_chr_open_null();
4247 break;
4248 case CHARDEV_BACKEND_KIND_MUX:
4249 base = qemu_chr_find(backend->mux->chardev);
4250 if (base == NULL) {
4251 error_setg(errp, "mux: base chardev %s not found",
4252 backend->mux->chardev);
4253 break;
4254 }
4255 chr = qemu_chr_open_mux(base);
4256 break;
4257 case CHARDEV_BACKEND_KIND_MSMOUSE:
4258 chr = qemu_chr_open_msmouse();
4259 break;
4260 #ifdef CONFIG_BRLAPI
4261 case CHARDEV_BACKEND_KIND_BRAILLE:
4262 chr = chr_baum_init();
4263 break;
4264 #endif
4265 case CHARDEV_BACKEND_KIND_TESTDEV:
4266 chr = chr_testdev_init();
4267 break;
4268 case CHARDEV_BACKEND_KIND_STDIO:
4269 chr = qemu_chr_open_stdio(backend->stdio);
4270 break;
4271 #ifdef _WIN32
4272 case CHARDEV_BACKEND_KIND_CONSOLE:
4273 chr = qemu_chr_open_win_con();
4274 break;
4275 #endif
4276 #ifdef CONFIG_SPICE
4277 case CHARDEV_BACKEND_KIND_SPICEVMC:
4278 chr = qemu_chr_open_spice_vmc(backend->spicevmc->type);
4279 break;
4280 case CHARDEV_BACKEND_KIND_SPICEPORT:
4281 chr = qemu_chr_open_spice_port(backend->spiceport->fqdn);
4282 break;
4283 #endif
4284 case CHARDEV_BACKEND_KIND_VC:
4285 chr = vc_init(backend->vc);
4286 break;
4287 case CHARDEV_BACKEND_KIND_RINGBUF:
4288 case CHARDEV_BACKEND_KIND_MEMORY:
4289 chr = qemu_chr_open_ringbuf(backend->ringbuf, errp);
4290 break;
4291 default:
4292 error_setg(errp, "unknown chardev backend (%d)", backend->kind);
4293 break;
4294 }
4295
4296 /*
4297 * Character backend open hasn't been fully converted to the Error
4298 * API. Some opens fail without setting an error. Set a generic
4299 * error then.
4300 * TODO full conversion to Error API
4301 */
4302 if (chr == NULL && errp && !*errp) {
4303 error_setg(errp, "Failed to create chardev");
4304 }
4305 if (chr) {
4306 chr->label = g_strdup(id);
4307 chr->avail_connections =
4308 (backend->kind == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1;
4309 if (!chr->filename) {
4310 chr->filename = g_strdup(ChardevBackendKind_lookup[backend->kind]);
4311 }
4312 if (!chr->explicit_be_open) {
4313 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
4314 }
4315 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
4316 return ret;
4317 } else {
4318 g_free(ret);
4319 return NULL;
4320 }
4321 }
4322
4323 void qmp_chardev_remove(const char *id, Error **errp)
4324 {
4325 CharDriverState *chr;
4326
4327 chr = qemu_chr_find(id);
4328 if (chr == NULL) {
4329 error_setg(errp, "Chardev '%s' not found", id);
4330 return;
4331 }
4332 if (chr->chr_can_read || chr->chr_read ||
4333 chr->chr_event || chr->handler_opaque) {
4334 error_setg(errp, "Chardev '%s' is busy", id);
4335 return;
4336 }
4337 qemu_chr_delete(chr);
4338 }
4339
4340 static void register_types(void)
4341 {
4342 register_char_driver("null", CHARDEV_BACKEND_KIND_NULL, NULL);
4343 register_char_driver("socket", CHARDEV_BACKEND_KIND_SOCKET,
4344 qemu_chr_parse_socket);
4345 register_char_driver("udp", CHARDEV_BACKEND_KIND_UDP, qemu_chr_parse_udp);
4346 register_char_driver("ringbuf", CHARDEV_BACKEND_KIND_RINGBUF,
4347 qemu_chr_parse_ringbuf);
4348 register_char_driver("file", CHARDEV_BACKEND_KIND_FILE,
4349 qemu_chr_parse_file_out);
4350 register_char_driver("stdio", CHARDEV_BACKEND_KIND_STDIO,
4351 qemu_chr_parse_stdio);
4352 register_char_driver("serial", CHARDEV_BACKEND_KIND_SERIAL,
4353 qemu_chr_parse_serial);
4354 register_char_driver("tty", CHARDEV_BACKEND_KIND_SERIAL,
4355 qemu_chr_parse_serial);
4356 register_char_driver("parallel", CHARDEV_BACKEND_KIND_PARALLEL,
4357 qemu_chr_parse_parallel);
4358 register_char_driver("parport", CHARDEV_BACKEND_KIND_PARALLEL,
4359 qemu_chr_parse_parallel);
4360 register_char_driver("pty", CHARDEV_BACKEND_KIND_PTY, NULL);
4361 register_char_driver("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL);
4362 register_char_driver("pipe", CHARDEV_BACKEND_KIND_PIPE,
4363 qemu_chr_parse_pipe);
4364 register_char_driver("mux", CHARDEV_BACKEND_KIND_MUX, qemu_chr_parse_mux);
4365 /* Bug-compatibility: */
4366 register_char_driver("memory", CHARDEV_BACKEND_KIND_MEMORY,
4367 qemu_chr_parse_ringbuf);
4368 /* this must be done after machine init, since we register FEs with muxes
4369 * as part of realize functions like serial_isa_realizefn when -nographic
4370 * is specified
4371 */
4372 qemu_add_machine_init_done_notifier(&muxes_realize_notify);
4373 }
4374
4375 type_init(register_types);
Ray Wang's QEMU Repository