qemu-char: fix MISSING_COMMA
[qemu.git] / qemu-char.c
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu-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
92 /***********************************************************/
93 /* Socket address helpers */
94 static void qapi_copy_SocketAddress(SocketAddress **p_dest,
95 SocketAddress *src)
96 {
97 QmpOutputVisitor *qov;
98 QmpInputVisitor *qiv;
99 Visitor *ov, *iv;
100 QObject *obj;
101
102 *p_dest = NULL;
103
104 qov = qmp_output_visitor_new();
105 ov = qmp_output_get_visitor(qov);
106 visit_type_SocketAddress(ov, &src, NULL, &error_abort);
107 obj = qmp_output_get_qobject(qov);
108 qmp_output_visitor_cleanup(qov);
109 if (!obj) {
110 return;
111 }
112
113 qiv = qmp_input_visitor_new(obj);
114 iv = qmp_input_get_visitor(qiv);
115 visit_type_SocketAddress(iv, p_dest, NULL, &error_abort);
116 qmp_input_visitor_cleanup(qiv);
117 qobject_decref(obj);
118 }
119
120 static int SocketAddress_to_str(char *dest, int max_len,
121 const char *prefix, SocketAddress *addr,
122 bool is_listen, bool is_telnet)
123 {
124 switch (addr->kind) {
125 case SOCKET_ADDRESS_KIND_INET:
126 return snprintf(dest, max_len, "%s%s:%s:%s%s", prefix,
127 is_telnet ? "telnet" : "tcp", addr->inet->host,
128 addr->inet->port, is_listen ? ",server" : "");
129 break;
130 case SOCKET_ADDRESS_KIND_UNIX:
131 return snprintf(dest, max_len, "%sunix:%s%s", prefix,
132 addr->q_unix->path, is_listen ? ",server" : "");
133 break;
134 case SOCKET_ADDRESS_KIND_FD:
135 return snprintf(dest, max_len, "%sfd:%s%s", prefix, addr->fd->str,
136 is_listen ? ",server" : "");
137 break;
138 default:
139 abort();
140 }
141 }
142
143 static int sockaddr_to_str(char *dest, int max_len,
144 struct sockaddr_storage *ss, socklen_t ss_len,
145 struct sockaddr_storage *ps, socklen_t ps_len,
146 bool is_listen, bool is_telnet)
147 {
148 char shost[NI_MAXHOST], sserv[NI_MAXSERV];
149 char phost[NI_MAXHOST], pserv[NI_MAXSERV];
150 const char *left = "", *right = "";
151
152 switch (ss->ss_family) {
153 #ifndef _WIN32
154 case AF_UNIX:
155 return snprintf(dest, max_len, "unix:%s%s",
156 ((struct sockaddr_un *)(ss))->sun_path,
157 is_listen ? ",server" : "");
158 #endif
159 case AF_INET6:
160 left = "[";
161 right = "]";
162 /* fall through */
163 case AF_INET:
164 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost),
165 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV);
166 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost),
167 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV);
168 return snprintf(dest, max_len, "%s:%s%s%s:%s%s <-> %s%s%s:%s",
169 is_telnet ? "telnet" : "tcp",
170 left, shost, right, sserv,
171 is_listen ? ",server" : "",
172 left, phost, right, pserv);
173
174 default:
175 return snprintf(dest, max_len, "unknown");
176 }
177 }
178
179 /***********************************************************/
180 /* character device */
181
182 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
183 QTAILQ_HEAD_INITIALIZER(chardevs);
184
185 CharDriverState *qemu_chr_alloc(void)
186 {
187 CharDriverState *chr = g_malloc0(sizeof(CharDriverState));
188 qemu_mutex_init(&chr->chr_write_lock);
189 return chr;
190 }
191
192 void qemu_chr_be_event(CharDriverState *s, int event)
193 {
194 /* Keep track if the char device is open */
195 switch (event) {
196 case CHR_EVENT_OPENED:
197 s->be_open = 1;
198 break;
199 case CHR_EVENT_CLOSED:
200 s->be_open = 0;
201 break;
202 }
203
204 if (!s->chr_event)
205 return;
206 s->chr_event(s->handler_opaque, event);
207 }
208
209 void qemu_chr_be_generic_open(CharDriverState *s)
210 {
211 qemu_chr_be_event(s, CHR_EVENT_OPENED);
212 }
213
214 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
215 {
216 int ret;
217
218 qemu_mutex_lock(&s->chr_write_lock);
219 ret = s->chr_write(s, buf, len);
220 qemu_mutex_unlock(&s->chr_write_lock);
221 return ret;
222 }
223
224 int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len)
225 {
226 int offset = 0;
227 int res = 0;
228
229 qemu_mutex_lock(&s->chr_write_lock);
230 while (offset < len) {
231 do {
232 res = s->chr_write(s, buf + offset, len - offset);
233 if (res == -1 && errno == EAGAIN) {
234 g_usleep(100);
235 }
236 } while (res == -1 && errno == EAGAIN);
237
238 if (res <= 0) {
239 break;
240 }
241
242 offset += res;
243 }
244 qemu_mutex_unlock(&s->chr_write_lock);
245
246 if (res < 0) {
247 return res;
248 }
249 return offset;
250 }
251
252 int qemu_chr_fe_read_all(CharDriverState *s, uint8_t *buf, int len)
253 {
254 int offset = 0, counter = 10;
255 int res;
256
257 if (!s->chr_sync_read) {
258 return 0;
259 }
260
261 while (offset < len) {
262 do {
263 res = s->chr_sync_read(s, buf + offset, len - offset);
264 if (res == -1 && errno == EAGAIN) {
265 g_usleep(100);
266 }
267 } while (res == -1 && errno == EAGAIN);
268
269 if (res == 0) {
270 break;
271 }
272
273 if (res < 0) {
274 return res;
275 }
276
277 offset += res;
278
279 if (!counter--) {
280 break;
281 }
282 }
283
284 return offset;
285 }
286
287 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
288 {
289 if (!s->chr_ioctl)
290 return -ENOTSUP;
291 return s->chr_ioctl(s, cmd, arg);
292 }
293
294 int qemu_chr_be_can_write(CharDriverState *s)
295 {
296 if (!s->chr_can_read)
297 return 0;
298 return s->chr_can_read(s->handler_opaque);
299 }
300
301 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
302 {
303 if (s->chr_read) {
304 s->chr_read(s->handler_opaque, buf, len);
305 }
306 }
307
308 int qemu_chr_fe_get_msgfd(CharDriverState *s)
309 {
310 int fd;
311 return (qemu_chr_fe_get_msgfds(s, &fd, 1) == 1) ? fd : -1;
312 }
313
314 int qemu_chr_fe_get_msgfds(CharDriverState *s, int *fds, int len)
315 {
316 return s->get_msgfds ? s->get_msgfds(s, fds, len) : -1;
317 }
318
319 int qemu_chr_fe_set_msgfds(CharDriverState *s, int *fds, int num)
320 {
321 return s->set_msgfds ? s->set_msgfds(s, fds, num) : -1;
322 }
323
324 int qemu_chr_add_client(CharDriverState *s, int fd)
325 {
326 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
327 }
328
329 void qemu_chr_accept_input(CharDriverState *s)
330 {
331 if (s->chr_accept_input)
332 s->chr_accept_input(s);
333 qemu_notify_event();
334 }
335
336 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
337 {
338 char buf[READ_BUF_LEN];
339 va_list ap;
340 va_start(ap, fmt);
341 vsnprintf(buf, sizeof(buf), fmt, ap);
342 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
343 va_end(ap);
344 }
345
346 static void remove_fd_in_watch(CharDriverState *chr);
347
348 void qemu_chr_add_handlers(CharDriverState *s,
349 IOCanReadHandler *fd_can_read,
350 IOReadHandler *fd_read,
351 IOEventHandler *fd_event,
352 void *opaque)
353 {
354 int fe_open;
355
356 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
357 fe_open = 0;
358 remove_fd_in_watch(s);
359 } else {
360 fe_open = 1;
361 }
362 s->chr_can_read = fd_can_read;
363 s->chr_read = fd_read;
364 s->chr_event = fd_event;
365 s->handler_opaque = opaque;
366 if (fe_open && s->chr_update_read_handler)
367 s->chr_update_read_handler(s);
368
369 if (!s->explicit_fe_open) {
370 qemu_chr_fe_set_open(s, fe_open);
371 }
372
373 /* We're connecting to an already opened device, so let's make sure we
374 also get the open event */
375 if (fe_open && s->be_open) {
376 qemu_chr_be_generic_open(s);
377 }
378 }
379
380 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
381 {
382 return len;
383 }
384
385 static CharDriverState *qemu_chr_open_null(void)
386 {
387 CharDriverState *chr;
388
389 chr = qemu_chr_alloc();
390 chr->chr_write = null_chr_write;
391 chr->explicit_be_open = true;
392 return chr;
393 }
394
395 /* MUX driver for serial I/O splitting */
396 #define MAX_MUX 4
397 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
398 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
399 typedef struct {
400 IOCanReadHandler *chr_can_read[MAX_MUX];
401 IOReadHandler *chr_read[MAX_MUX];
402 IOEventHandler *chr_event[MAX_MUX];
403 void *ext_opaque[MAX_MUX];
404 CharDriverState *drv;
405 int focus;
406 int mux_cnt;
407 int term_got_escape;
408 int max_size;
409 /* Intermediate input buffer allows to catch escape sequences even if the
410 currently active device is not accepting any input - but only until it
411 is full as well. */
412 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
413 int prod[MAX_MUX];
414 int cons[MAX_MUX];
415 int timestamps;
416
417 /* Protected by the CharDriverState chr_write_lock. */
418 int linestart;
419 int64_t timestamps_start;
420 } MuxDriver;
421
422
423 /* Called with chr_write_lock held. */
424 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
425 {
426 MuxDriver *d = chr->opaque;
427 int ret;
428 if (!d->timestamps) {
429 ret = qemu_chr_fe_write(d->drv, buf, len);
430 } else {
431 int i;
432
433 ret = 0;
434 for (i = 0; i < len; i++) {
435 if (d->linestart) {
436 char buf1[64];
437 int64_t ti;
438 int secs;
439
440 ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
441 if (d->timestamps_start == -1)
442 d->timestamps_start = ti;
443 ti -= d->timestamps_start;
444 secs = ti / 1000;
445 snprintf(buf1, sizeof(buf1),
446 "[%02d:%02d:%02d.%03d] ",
447 secs / 3600,
448 (secs / 60) % 60,
449 secs % 60,
450 (int)(ti % 1000));
451 qemu_chr_fe_write(d->drv, (uint8_t *)buf1, strlen(buf1));
452 d->linestart = 0;
453 }
454 ret += qemu_chr_fe_write(d->drv, buf+i, 1);
455 if (buf[i] == '\n') {
456 d->linestart = 1;
457 }
458 }
459 }
460 return ret;
461 }
462
463 static const char * const mux_help[] = {
464 "% h print this help\n\r",
465 "% x exit emulator\n\r",
466 "% s save disk data back to file (if -snapshot)\n\r",
467 "% t toggle console timestamps\n\r",
468 "% b send break (magic sysrq)\n\r",
469 "% c switch between console and monitor\n\r",
470 "% % sends %\n\r",
471 NULL
472 };
473
474 int term_escape_char = 0x01; /* ctrl-a is used for escape */
475 static void mux_print_help(CharDriverState *chr)
476 {
477 int i, j;
478 char ebuf[15] = "Escape-Char";
479 char cbuf[50] = "\n\r";
480
481 if (term_escape_char > 0 && term_escape_char < 26) {
482 snprintf(cbuf, sizeof(cbuf), "\n\r");
483 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
484 } else {
485 snprintf(cbuf, sizeof(cbuf),
486 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
487 term_escape_char);
488 }
489 qemu_chr_fe_write(chr, (uint8_t *)cbuf, strlen(cbuf));
490 for (i = 0; mux_help[i] != NULL; i++) {
491 for (j=0; mux_help[i][j] != '\0'; j++) {
492 if (mux_help[i][j] == '%')
493 qemu_chr_fe_write(chr, (uint8_t *)ebuf, strlen(ebuf));
494 else
495 qemu_chr_fe_write(chr, (uint8_t *)&mux_help[i][j], 1);
496 }
497 }
498 }
499
500 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
501 {
502 if (d->chr_event[mux_nr])
503 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
504 }
505
506 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
507 {
508 if (d->term_got_escape) {
509 d->term_got_escape = 0;
510 if (ch == term_escape_char)
511 goto send_char;
512 switch(ch) {
513 case '?':
514 case 'h':
515 mux_print_help(chr);
516 break;
517 case 'x':
518 {
519 const char *term = "QEMU: Terminated\n\r";
520 qemu_chr_fe_write(chr, (uint8_t *)term, strlen(term));
521 exit(0);
522 break;
523 }
524 case 's':
525 bdrv_commit_all();
526 break;
527 case 'b':
528 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
529 break;
530 case 'c':
531 /* Switch to the next registered device */
532 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
533 d->focus++;
534 if (d->focus >= d->mux_cnt)
535 d->focus = 0;
536 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
537 break;
538 case 't':
539 d->timestamps = !d->timestamps;
540 d->timestamps_start = -1;
541 d->linestart = 0;
542 break;
543 }
544 } else if (ch == term_escape_char) {
545 d->term_got_escape = 1;
546 } else {
547 send_char:
548 return 1;
549 }
550 return 0;
551 }
552
553 static void mux_chr_accept_input(CharDriverState *chr)
554 {
555 MuxDriver *d = chr->opaque;
556 int m = d->focus;
557
558 while (d->prod[m] != d->cons[m] &&
559 d->chr_can_read[m] &&
560 d->chr_can_read[m](d->ext_opaque[m])) {
561 d->chr_read[m](d->ext_opaque[m],
562 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
563 }
564 }
565
566 static int mux_chr_can_read(void *opaque)
567 {
568 CharDriverState *chr = opaque;
569 MuxDriver *d = chr->opaque;
570 int m = d->focus;
571
572 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
573 return 1;
574 if (d->chr_can_read[m])
575 return d->chr_can_read[m](d->ext_opaque[m]);
576 return 0;
577 }
578
579 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
580 {
581 CharDriverState *chr = opaque;
582 MuxDriver *d = chr->opaque;
583 int m = d->focus;
584 int i;
585
586 mux_chr_accept_input (opaque);
587
588 for(i = 0; i < size; i++)
589 if (mux_proc_byte(chr, d, buf[i])) {
590 if (d->prod[m] == d->cons[m] &&
591 d->chr_can_read[m] &&
592 d->chr_can_read[m](d->ext_opaque[m]))
593 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
594 else
595 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
596 }
597 }
598
599 static void mux_chr_event(void *opaque, int event)
600 {
601 CharDriverState *chr = opaque;
602 MuxDriver *d = chr->opaque;
603 int i;
604
605 /* Send the event to all registered listeners */
606 for (i = 0; i < d->mux_cnt; i++)
607 mux_chr_send_event(d, i, event);
608 }
609
610 static void mux_chr_update_read_handler(CharDriverState *chr)
611 {
612 MuxDriver *d = chr->opaque;
613
614 if (d->mux_cnt >= MAX_MUX) {
615 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
616 return;
617 }
618 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
619 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
620 d->chr_read[d->mux_cnt] = chr->chr_read;
621 d->chr_event[d->mux_cnt] = chr->chr_event;
622 /* Fix up the real driver with mux routines */
623 if (d->mux_cnt == 0) {
624 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
625 mux_chr_event, chr);
626 }
627 if (d->focus != -1) {
628 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
629 }
630 d->focus = d->mux_cnt;
631 d->mux_cnt++;
632 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
633 }
634
635 static bool muxes_realized;
636
637 /**
638 * Called after processing of default and command-line-specified
639 * chardevs to deliver CHR_EVENT_OPENED events to any FEs attached
640 * to a mux chardev. This is done here to ensure that
641 * output/prompts/banners are only displayed for the FE that has
642 * focus when initial command-line processing/machine init is
643 * completed.
644 *
645 * After this point, any new FE attached to any new or existing
646 * mux will receive CHR_EVENT_OPENED notifications for the BE
647 * immediately.
648 */
649 static void muxes_realize_done(Notifier *notifier, void *unused)
650 {
651 CharDriverState *chr;
652
653 QTAILQ_FOREACH(chr, &chardevs, next) {
654 if (chr->is_mux) {
655 MuxDriver *d = chr->opaque;
656 int i;
657
658 /* send OPENED to all already-attached FEs */
659 for (i = 0; i < d->mux_cnt; i++) {
660 mux_chr_send_event(d, i, CHR_EVENT_OPENED);
661 }
662 /* mark mux as OPENED so any new FEs will immediately receive
663 * OPENED event
664 */
665 qemu_chr_be_generic_open(chr);
666 }
667 }
668 muxes_realized = true;
669 }
670
671 static Notifier muxes_realize_notify = {
672 .notify = muxes_realize_done,
673 };
674
675 static GSource *mux_chr_add_watch(CharDriverState *s, GIOCondition cond)
676 {
677 MuxDriver *d = s->opaque;
678 return d->drv->chr_add_watch(d->drv, cond);
679 }
680
681 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
682 {
683 CharDriverState *chr;
684 MuxDriver *d;
685
686 chr = qemu_chr_alloc();
687 d = g_malloc0(sizeof(MuxDriver));
688
689 chr->opaque = d;
690 d->drv = drv;
691 d->focus = -1;
692 chr->chr_write = mux_chr_write;
693 chr->chr_update_read_handler = mux_chr_update_read_handler;
694 chr->chr_accept_input = mux_chr_accept_input;
695 /* Frontend guest-open / -close notification is not support with muxes */
696 chr->chr_set_fe_open = NULL;
697 if (drv->chr_add_watch) {
698 chr->chr_add_watch = mux_chr_add_watch;
699 }
700 /* only default to opened state if we've realized the initial
701 * set of muxes
702 */
703 chr->explicit_be_open = muxes_realized ? 0 : 1;
704 chr->is_mux = 1;
705
706 return chr;
707 }
708
709
710 #ifdef _WIN32
711 int send_all(int fd, const void *buf, int len1)
712 {
713 int ret, len;
714
715 len = len1;
716 while (len > 0) {
717 ret = send(fd, buf, len, 0);
718 if (ret < 0) {
719 errno = WSAGetLastError();
720 if (errno != WSAEWOULDBLOCK) {
721 return -1;
722 }
723 } else if (ret == 0) {
724 break;
725 } else {
726 buf += ret;
727 len -= ret;
728 }
729 }
730 return len1 - len;
731 }
732
733 #else
734
735 int send_all(int fd, const void *_buf, int len1)
736 {
737 int ret, len;
738 const uint8_t *buf = _buf;
739
740 len = len1;
741 while (len > 0) {
742 ret = write(fd, buf, len);
743 if (ret < 0) {
744 if (errno != EINTR && errno != EAGAIN)
745 return -1;
746 } else if (ret == 0) {
747 break;
748 } else {
749 buf += ret;
750 len -= ret;
751 }
752 }
753 return len1 - len;
754 }
755
756 int recv_all(int fd, void *_buf, int len1, bool single_read)
757 {
758 int ret, len;
759 uint8_t *buf = _buf;
760
761 len = len1;
762 while ((len > 0) && (ret = read(fd, buf, len)) != 0) {
763 if (ret < 0) {
764 if (errno != EINTR && errno != EAGAIN) {
765 return -1;
766 }
767 continue;
768 } else {
769 if (single_read) {
770 return ret;
771 }
772 buf += ret;
773 len -= ret;
774 }
775 }
776 return len1 - len;
777 }
778
779 #endif /* !_WIN32 */
780
781 typedef struct IOWatchPoll
782 {
783 GSource parent;
784
785 GIOChannel *channel;
786 GSource *src;
787
788 IOCanReadHandler *fd_can_read;
789 GSourceFunc fd_read;
790 void *opaque;
791 } IOWatchPoll;
792
793 static IOWatchPoll *io_watch_poll_from_source(GSource *source)
794 {
795 return container_of(source, IOWatchPoll, parent);
796 }
797
798 static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_)
799 {
800 IOWatchPoll *iwp = io_watch_poll_from_source(source);
801 bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
802 bool was_active = iwp->src != NULL;
803 if (was_active == now_active) {
804 return FALSE;
805 }
806
807 if (now_active) {
808 iwp->src = g_io_create_watch(iwp->channel, G_IO_IN | G_IO_ERR | G_IO_HUP);
809 g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
810 g_source_attach(iwp->src, NULL);
811 } else {
812 g_source_destroy(iwp->src);
813 g_source_unref(iwp->src);
814 iwp->src = NULL;
815 }
816 return FALSE;
817 }
818
819 static gboolean io_watch_poll_check(GSource *source)
820 {
821 return FALSE;
822 }
823
824 static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
825 gpointer user_data)
826 {
827 abort();
828 }
829
830 static void io_watch_poll_finalize(GSource *source)
831 {
832 /* Due to a glib bug, removing the last reference to a source
833 * inside a finalize callback causes recursive locking (and a
834 * deadlock). This is not a problem inside other callbacks,
835 * including dispatch callbacks, so we call io_remove_watch_poll
836 * to remove this source. At this point, iwp->src must
837 * be NULL, or we would leak it.
838 *
839 * This would be solved much more elegantly by child sources,
840 * but we support older glib versions that do not have them.
841 */
842 IOWatchPoll *iwp = io_watch_poll_from_source(source);
843 assert(iwp->src == NULL);
844 }
845
846 static GSourceFuncs io_watch_poll_funcs = {
847 .prepare = io_watch_poll_prepare,
848 .check = io_watch_poll_check,
849 .dispatch = io_watch_poll_dispatch,
850 .finalize = io_watch_poll_finalize,
851 };
852
853 /* Can only be used for read */
854 static guint io_add_watch_poll(GIOChannel *channel,
855 IOCanReadHandler *fd_can_read,
856 GIOFunc fd_read,
857 gpointer user_data)
858 {
859 IOWatchPoll *iwp;
860 int tag;
861
862 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll));
863 iwp->fd_can_read = fd_can_read;
864 iwp->opaque = user_data;
865 iwp->channel = channel;
866 iwp->fd_read = (GSourceFunc) fd_read;
867 iwp->src = NULL;
868
869 tag = g_source_attach(&iwp->parent, NULL);
870 g_source_unref(&iwp->parent);
871 return tag;
872 }
873
874 static void io_remove_watch_poll(guint tag)
875 {
876 GSource *source;
877 IOWatchPoll *iwp;
878
879 g_return_if_fail (tag > 0);
880
881 source = g_main_context_find_source_by_id(NULL, tag);
882 g_return_if_fail (source != NULL);
883
884 iwp = io_watch_poll_from_source(source);
885 if (iwp->src) {
886 g_source_destroy(iwp->src);
887 g_source_unref(iwp->src);
888 iwp->src = NULL;
889 }
890 g_source_destroy(&iwp->parent);
891 }
892
893 static void remove_fd_in_watch(CharDriverState *chr)
894 {
895 if (chr->fd_in_tag) {
896 io_remove_watch_poll(chr->fd_in_tag);
897 chr->fd_in_tag = 0;
898 }
899 }
900
901 #ifndef _WIN32
902 static GIOChannel *io_channel_from_fd(int fd)
903 {
904 GIOChannel *chan;
905
906 if (fd == -1) {
907 return NULL;
908 }
909
910 chan = g_io_channel_unix_new(fd);
911
912 g_io_channel_set_encoding(chan, NULL, NULL);
913 g_io_channel_set_buffered(chan, FALSE);
914
915 return chan;
916 }
917 #endif
918
919 static GIOChannel *io_channel_from_socket(int fd)
920 {
921 GIOChannel *chan;
922
923 if (fd == -1) {
924 return NULL;
925 }
926
927 #ifdef _WIN32
928 chan = g_io_channel_win32_new_socket(fd);
929 #else
930 chan = g_io_channel_unix_new(fd);
931 #endif
932
933 g_io_channel_set_encoding(chan, NULL, NULL);
934 g_io_channel_set_buffered(chan, FALSE);
935
936 return chan;
937 }
938
939 static int io_channel_send(GIOChannel *fd, const void *buf, size_t len)
940 {
941 size_t offset = 0;
942 GIOStatus status = G_IO_STATUS_NORMAL;
943
944 while (offset < len && status == G_IO_STATUS_NORMAL) {
945 gsize bytes_written = 0;
946
947 status = g_io_channel_write_chars(fd, buf + offset, len - offset,
948 &bytes_written, NULL);
949 offset += bytes_written;
950 }
951
952 if (offset > 0) {
953 return offset;
954 }
955 switch (status) {
956 case G_IO_STATUS_NORMAL:
957 g_assert(len == 0);
958 return 0;
959 case G_IO_STATUS_AGAIN:
960 errno = EAGAIN;
961 return -1;
962 default:
963 break;
964 }
965 errno = EINVAL;
966 return -1;
967 }
968
969 #ifndef _WIN32
970
971 typedef struct FDCharDriver {
972 CharDriverState *chr;
973 GIOChannel *fd_in, *fd_out;
974 int max_size;
975 QTAILQ_ENTRY(FDCharDriver) node;
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
1115 static void term_exit(void)
1116 {
1117 tcsetattr (0, TCSANOW, &oldtty);
1118 fcntl(0, F_SETFL, old_fd0_flags);
1119 }
1120
1121 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
1122 {
1123 struct termios tty;
1124
1125 tty = oldtty;
1126 if (!echo) {
1127 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1128 |INLCR|IGNCR|ICRNL|IXON);
1129 tty.c_oflag |= OPOST;
1130 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1131 tty.c_cflag &= ~(CSIZE|PARENB);
1132 tty.c_cflag |= CS8;
1133 tty.c_cc[VMIN] = 1;
1134 tty.c_cc[VTIME] = 0;
1135 }
1136 if (!stdio_allow_signal)
1137 tty.c_lflag &= ~ISIG;
1138
1139 tcsetattr (0, TCSANOW, &tty);
1140 }
1141
1142 static void qemu_chr_close_stdio(struct CharDriverState *chr)
1143 {
1144 term_exit();
1145 fd_chr_close(chr);
1146 }
1147
1148 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
1149 {
1150 CharDriverState *chr;
1151
1152 if (is_daemonized()) {
1153 error_report("cannot use stdio with -daemonize");
1154 return NULL;
1155 }
1156
1157 if (stdio_in_use) {
1158 error_report("cannot use stdio by multiple character devices");
1159 exit(1);
1160 }
1161
1162 stdio_in_use = true;
1163 old_fd0_flags = fcntl(0, F_GETFL);
1164 tcgetattr(0, &oldtty);
1165 qemu_set_nonblock(0);
1166 atexit(term_exit);
1167
1168 chr = qemu_chr_open_fd(0, 1);
1169 chr->chr_close = qemu_chr_close_stdio;
1170 chr->chr_set_echo = qemu_chr_set_echo_stdio;
1171 if (opts->has_signal) {
1172 stdio_allow_signal = opts->signal;
1173 }
1174 qemu_chr_fe_set_echo(chr, false);
1175
1176 return chr;
1177 }
1178
1179 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1180 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
1181 || defined(__GLIBC__)
1182
1183 #define HAVE_CHARDEV_TTY 1
1184
1185 typedef struct {
1186 GIOChannel *fd;
1187 int read_bytes;
1188
1189 /* Protected by the CharDriverState chr_write_lock. */
1190 int connected;
1191 guint timer_tag;
1192 guint open_tag;
1193 } PtyCharDriver;
1194
1195 static void pty_chr_update_read_handler_locked(CharDriverState *chr);
1196 static void pty_chr_state(CharDriverState *chr, int connected);
1197
1198 static gboolean pty_chr_timer(gpointer opaque)
1199 {
1200 struct CharDriverState *chr = opaque;
1201 PtyCharDriver *s = chr->opaque;
1202
1203 qemu_mutex_lock(&chr->chr_write_lock);
1204 s->timer_tag = 0;
1205 s->open_tag = 0;
1206 if (!s->connected) {
1207 /* Next poll ... */
1208 pty_chr_update_read_handler_locked(chr);
1209 }
1210 qemu_mutex_unlock(&chr->chr_write_lock);
1211 return FALSE;
1212 }
1213
1214 /* Called with chr_write_lock held. */
1215 static void pty_chr_rearm_timer(CharDriverState *chr, int ms)
1216 {
1217 PtyCharDriver *s = chr->opaque;
1218
1219 if (s->timer_tag) {
1220 g_source_remove(s->timer_tag);
1221 s->timer_tag = 0;
1222 }
1223
1224 if (ms == 1000) {
1225 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1226 } else {
1227 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1228 }
1229 }
1230
1231 /* Called with chr_write_lock held. */
1232 static void pty_chr_update_read_handler_locked(CharDriverState *chr)
1233 {
1234 PtyCharDriver *s = chr->opaque;
1235 GPollFD pfd;
1236
1237 pfd.fd = g_io_channel_unix_get_fd(s->fd);
1238 pfd.events = G_IO_OUT;
1239 pfd.revents = 0;
1240 g_poll(&pfd, 1, 0);
1241 if (pfd.revents & G_IO_HUP) {
1242 pty_chr_state(chr, 0);
1243 } else {
1244 pty_chr_state(chr, 1);
1245 }
1246 }
1247
1248 static void pty_chr_update_read_handler(CharDriverState *chr)
1249 {
1250 qemu_mutex_lock(&chr->chr_write_lock);
1251 pty_chr_update_read_handler_locked(chr);
1252 qemu_mutex_unlock(&chr->chr_write_lock);
1253 }
1254
1255 /* Called with chr_write_lock held. */
1256 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1257 {
1258 PtyCharDriver *s = chr->opaque;
1259
1260 if (!s->connected) {
1261 /* guest sends data, check for (re-)connect */
1262 pty_chr_update_read_handler_locked(chr);
1263 if (!s->connected) {
1264 return 0;
1265 }
1266 }
1267 return io_channel_send(s->fd, buf, len);
1268 }
1269
1270 static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond)
1271 {
1272 PtyCharDriver *s = chr->opaque;
1273 if (!s->connected) {
1274 return NULL;
1275 }
1276 return g_io_create_watch(s->fd, cond);
1277 }
1278
1279 static int pty_chr_read_poll(void *opaque)
1280 {
1281 CharDriverState *chr = opaque;
1282 PtyCharDriver *s = chr->opaque;
1283
1284 s->read_bytes = qemu_chr_be_can_write(chr);
1285 return s->read_bytes;
1286 }
1287
1288 static gboolean pty_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
1289 {
1290 CharDriverState *chr = opaque;
1291 PtyCharDriver *s = chr->opaque;
1292 gsize size, len;
1293 uint8_t buf[READ_BUF_LEN];
1294 GIOStatus status;
1295
1296 len = sizeof(buf);
1297 if (len > s->read_bytes)
1298 len = s->read_bytes;
1299 if (len == 0) {
1300 return TRUE;
1301 }
1302 status = g_io_channel_read_chars(s->fd, (gchar *)buf, len, &size, NULL);
1303 if (status != G_IO_STATUS_NORMAL) {
1304 pty_chr_state(chr, 0);
1305 return FALSE;
1306 } else {
1307 pty_chr_state(chr, 1);
1308 qemu_chr_be_write(chr, buf, size);
1309 }
1310 return TRUE;
1311 }
1312
1313 static gboolean qemu_chr_be_generic_open_func(gpointer opaque)
1314 {
1315 CharDriverState *chr = opaque;
1316 PtyCharDriver *s = chr->opaque;
1317
1318 s->open_tag = 0;
1319 qemu_chr_be_generic_open(chr);
1320 return FALSE;
1321 }
1322
1323 /* Called with chr_write_lock held. */
1324 static void pty_chr_state(CharDriverState *chr, int connected)
1325 {
1326 PtyCharDriver *s = chr->opaque;
1327
1328 if (!connected) {
1329 if (s->open_tag) {
1330 g_source_remove(s->open_tag);
1331 s->open_tag = 0;
1332 }
1333 remove_fd_in_watch(chr);
1334 s->connected = 0;
1335 /* (re-)connect poll interval for idle guests: once per second.
1336 * We check more frequently in case the guests sends data to
1337 * the virtual device linked to our pty. */
1338 pty_chr_rearm_timer(chr, 1000);
1339 } else {
1340 if (s->timer_tag) {
1341 g_source_remove(s->timer_tag);
1342 s->timer_tag = 0;
1343 }
1344 if (!s->connected) {
1345 g_assert(s->open_tag == 0);
1346 s->connected = 1;
1347 s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, chr);
1348 }
1349 if (!chr->fd_in_tag) {
1350 chr->fd_in_tag = io_add_watch_poll(s->fd, pty_chr_read_poll,
1351 pty_chr_read, chr);
1352 }
1353 }
1354 }
1355
1356 static void pty_chr_close(struct CharDriverState *chr)
1357 {
1358 PtyCharDriver *s = chr->opaque;
1359 int fd;
1360
1361 qemu_mutex_lock(&chr->chr_write_lock);
1362 pty_chr_state(chr, 0);
1363 fd = g_io_channel_unix_get_fd(s->fd);
1364 g_io_channel_unref(s->fd);
1365 close(fd);
1366 if (s->timer_tag) {
1367 g_source_remove(s->timer_tag);
1368 s->timer_tag = 0;
1369 }
1370 qemu_mutex_unlock(&chr->chr_write_lock);
1371 g_free(s);
1372 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1373 }
1374
1375 static CharDriverState *qemu_chr_open_pty(const char *id,
1376 ChardevReturn *ret)
1377 {
1378 CharDriverState *chr;
1379 PtyCharDriver *s;
1380 int master_fd, slave_fd;
1381 char pty_name[PATH_MAX];
1382
1383 master_fd = qemu_openpty_raw(&slave_fd, pty_name);
1384 if (master_fd < 0) {
1385 return NULL;
1386 }
1387
1388 close(slave_fd);
1389
1390 chr = qemu_chr_alloc();
1391
1392 chr->filename = g_strdup_printf("pty:%s", pty_name);
1393 ret->pty = g_strdup(pty_name);
1394 ret->has_pty = true;
1395
1396 fprintf(stderr, "char device redirected to %s (label %s)\n",
1397 pty_name, id);
1398
1399 s = g_malloc0(sizeof(PtyCharDriver));
1400 chr->opaque = s;
1401 chr->chr_write = pty_chr_write;
1402 chr->chr_update_read_handler = pty_chr_update_read_handler;
1403 chr->chr_close = pty_chr_close;
1404 chr->chr_add_watch = pty_chr_add_watch;
1405 chr->explicit_be_open = true;
1406
1407 s->fd = io_channel_from_fd(master_fd);
1408 s->timer_tag = 0;
1409
1410 return chr;
1411 }
1412
1413 static void tty_serial_init(int fd, int speed,
1414 int parity, int data_bits, int stop_bits)
1415 {
1416 struct termios tty;
1417 speed_t spd;
1418
1419 #if 0
1420 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1421 speed, parity, data_bits, stop_bits);
1422 #endif
1423 tcgetattr (fd, &tty);
1424
1425 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1426 speed = speed * 10 / 11;
1427 do {
1428 check_speed(50);
1429 check_speed(75);
1430 check_speed(110);
1431 check_speed(134);
1432 check_speed(150);
1433 check_speed(200);
1434 check_speed(300);
1435 check_speed(600);
1436 check_speed(1200);
1437 check_speed(1800);
1438 check_speed(2400);
1439 check_speed(4800);
1440 check_speed(9600);
1441 check_speed(19200);
1442 check_speed(38400);
1443 /* Non-Posix values follow. They may be unsupported on some systems. */
1444 check_speed(57600);
1445 check_speed(115200);
1446 #ifdef B230400
1447 check_speed(230400);
1448 #endif
1449 #ifdef B460800
1450 check_speed(460800);
1451 #endif
1452 #ifdef B500000
1453 check_speed(500000);
1454 #endif
1455 #ifdef B576000
1456 check_speed(576000);
1457 #endif
1458 #ifdef B921600
1459 check_speed(921600);
1460 #endif
1461 #ifdef B1000000
1462 check_speed(1000000);
1463 #endif
1464 #ifdef B1152000
1465 check_speed(1152000);
1466 #endif
1467 #ifdef B1500000
1468 check_speed(1500000);
1469 #endif
1470 #ifdef B2000000
1471 check_speed(2000000);
1472 #endif
1473 #ifdef B2500000
1474 check_speed(2500000);
1475 #endif
1476 #ifdef B3000000
1477 check_speed(3000000);
1478 #endif
1479 #ifdef B3500000
1480 check_speed(3500000);
1481 #endif
1482 #ifdef B4000000
1483 check_speed(4000000);
1484 #endif
1485 spd = B115200;
1486 } while (0);
1487
1488 cfsetispeed(&tty, spd);
1489 cfsetospeed(&tty, spd);
1490
1491 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1492 |INLCR|IGNCR|ICRNL|IXON);
1493 tty.c_oflag |= OPOST;
1494 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1495 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1496 switch(data_bits) {
1497 default:
1498 case 8:
1499 tty.c_cflag |= CS8;
1500 break;
1501 case 7:
1502 tty.c_cflag |= CS7;
1503 break;
1504 case 6:
1505 tty.c_cflag |= CS6;
1506 break;
1507 case 5:
1508 tty.c_cflag |= CS5;
1509 break;
1510 }
1511 switch(parity) {
1512 default:
1513 case 'N':
1514 break;
1515 case 'E':
1516 tty.c_cflag |= PARENB;
1517 break;
1518 case 'O':
1519 tty.c_cflag |= PARENB | PARODD;
1520 break;
1521 }
1522 if (stop_bits == 2)
1523 tty.c_cflag |= CSTOPB;
1524
1525 tcsetattr (fd, TCSANOW, &tty);
1526 }
1527
1528 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1529 {
1530 FDCharDriver *s = chr->opaque;
1531
1532 switch(cmd) {
1533 case CHR_IOCTL_SERIAL_SET_PARAMS:
1534 {
1535 QEMUSerialSetParams *ssp = arg;
1536 tty_serial_init(g_io_channel_unix_get_fd(s->fd_in),
1537 ssp->speed, ssp->parity,
1538 ssp->data_bits, ssp->stop_bits);
1539 }
1540 break;
1541 case CHR_IOCTL_SERIAL_SET_BREAK:
1542 {
1543 int enable = *(int *)arg;
1544 if (enable) {
1545 tcsendbreak(g_io_channel_unix_get_fd(s->fd_in), 1);
1546 }
1547 }
1548 break;
1549 case CHR_IOCTL_SERIAL_GET_TIOCM:
1550 {
1551 int sarg = 0;
1552 int *targ = (int *)arg;
1553 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &sarg);
1554 *targ = 0;
1555 if (sarg & TIOCM_CTS)
1556 *targ |= CHR_TIOCM_CTS;
1557 if (sarg & TIOCM_CAR)
1558 *targ |= CHR_TIOCM_CAR;
1559 if (sarg & TIOCM_DSR)
1560 *targ |= CHR_TIOCM_DSR;
1561 if (sarg & TIOCM_RI)
1562 *targ |= CHR_TIOCM_RI;
1563 if (sarg & TIOCM_DTR)
1564 *targ |= CHR_TIOCM_DTR;
1565 if (sarg & TIOCM_RTS)
1566 *targ |= CHR_TIOCM_RTS;
1567 }
1568 break;
1569 case CHR_IOCTL_SERIAL_SET_TIOCM:
1570 {
1571 int sarg = *(int *)arg;
1572 int targ = 0;
1573 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMGET, &targ);
1574 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1575 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1576 if (sarg & CHR_TIOCM_CTS)
1577 targ |= TIOCM_CTS;
1578 if (sarg & CHR_TIOCM_CAR)
1579 targ |= TIOCM_CAR;
1580 if (sarg & CHR_TIOCM_DSR)
1581 targ |= TIOCM_DSR;
1582 if (sarg & CHR_TIOCM_RI)
1583 targ |= TIOCM_RI;
1584 if (sarg & CHR_TIOCM_DTR)
1585 targ |= TIOCM_DTR;
1586 if (sarg & CHR_TIOCM_RTS)
1587 targ |= TIOCM_RTS;
1588 ioctl(g_io_channel_unix_get_fd(s->fd_in), TIOCMSET, &targ);
1589 }
1590 break;
1591 default:
1592 return -ENOTSUP;
1593 }
1594 return 0;
1595 }
1596
1597 static void qemu_chr_close_tty(CharDriverState *chr)
1598 {
1599 FDCharDriver *s = chr->opaque;
1600 int fd = -1;
1601
1602 if (s) {
1603 fd = g_io_channel_unix_get_fd(s->fd_in);
1604 }
1605
1606 fd_chr_close(chr);
1607
1608 if (fd >= 0) {
1609 close(fd);
1610 }
1611 }
1612
1613 static CharDriverState *qemu_chr_open_tty_fd(int fd)
1614 {
1615 CharDriverState *chr;
1616
1617 tty_serial_init(fd, 115200, 'N', 8, 1);
1618 chr = qemu_chr_open_fd(fd, fd);
1619 chr->chr_ioctl = tty_serial_ioctl;
1620 chr->chr_close = qemu_chr_close_tty;
1621 return chr;
1622 }
1623 #endif /* __linux__ || __sun__ */
1624
1625 #if defined(__linux__)
1626
1627 #define HAVE_CHARDEV_PARPORT 1
1628
1629 typedef struct {
1630 int fd;
1631 int mode;
1632 } ParallelCharDriver;
1633
1634 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1635 {
1636 if (s->mode != mode) {
1637 int m = mode;
1638 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1639 return 0;
1640 s->mode = mode;
1641 }
1642 return 1;
1643 }
1644
1645 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1646 {
1647 ParallelCharDriver *drv = chr->opaque;
1648 int fd = drv->fd;
1649 uint8_t b;
1650
1651 switch(cmd) {
1652 case CHR_IOCTL_PP_READ_DATA:
1653 if (ioctl(fd, PPRDATA, &b) < 0)
1654 return -ENOTSUP;
1655 *(uint8_t *)arg = b;
1656 break;
1657 case CHR_IOCTL_PP_WRITE_DATA:
1658 b = *(uint8_t *)arg;
1659 if (ioctl(fd, PPWDATA, &b) < 0)
1660 return -ENOTSUP;
1661 break;
1662 case CHR_IOCTL_PP_READ_CONTROL:
1663 if (ioctl(fd, PPRCONTROL, &b) < 0)
1664 return -ENOTSUP;
1665 /* Linux gives only the lowest bits, and no way to know data
1666 direction! For better compatibility set the fixed upper
1667 bits. */
1668 *(uint8_t *)arg = b | 0xc0;
1669 break;
1670 case CHR_IOCTL_PP_WRITE_CONTROL:
1671 b = *(uint8_t *)arg;
1672 if (ioctl(fd, PPWCONTROL, &b) < 0)
1673 return -ENOTSUP;
1674 break;
1675 case CHR_IOCTL_PP_READ_STATUS:
1676 if (ioctl(fd, PPRSTATUS, &b) < 0)
1677 return -ENOTSUP;
1678 *(uint8_t *)arg = b;
1679 break;
1680 case CHR_IOCTL_PP_DATA_DIR:
1681 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1682 return -ENOTSUP;
1683 break;
1684 case CHR_IOCTL_PP_EPP_READ_ADDR:
1685 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1686 struct ParallelIOArg *parg = arg;
1687 int n = read(fd, parg->buffer, parg->count);
1688 if (n != parg->count) {
1689 return -EIO;
1690 }
1691 }
1692 break;
1693 case CHR_IOCTL_PP_EPP_READ:
1694 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1695 struct ParallelIOArg *parg = arg;
1696 int n = read(fd, parg->buffer, parg->count);
1697 if (n != parg->count) {
1698 return -EIO;
1699 }
1700 }
1701 break;
1702 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1703 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1704 struct ParallelIOArg *parg = arg;
1705 int n = write(fd, parg->buffer, parg->count);
1706 if (n != parg->count) {
1707 return -EIO;
1708 }
1709 }
1710 break;
1711 case CHR_IOCTL_PP_EPP_WRITE:
1712 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1713 struct ParallelIOArg *parg = arg;
1714 int n = write(fd, parg->buffer, parg->count);
1715 if (n != parg->count) {
1716 return -EIO;
1717 }
1718 }
1719 break;
1720 default:
1721 return -ENOTSUP;
1722 }
1723 return 0;
1724 }
1725
1726 static void pp_close(CharDriverState *chr)
1727 {
1728 ParallelCharDriver *drv = chr->opaque;
1729 int fd = drv->fd;
1730
1731 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1732 ioctl(fd, PPRELEASE);
1733 close(fd);
1734 g_free(drv);
1735 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1736 }
1737
1738 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1739 {
1740 CharDriverState *chr;
1741 ParallelCharDriver *drv;
1742
1743 if (ioctl(fd, PPCLAIM) < 0) {
1744 close(fd);
1745 return NULL;
1746 }
1747
1748 drv = g_malloc0(sizeof(ParallelCharDriver));
1749 drv->fd = fd;
1750 drv->mode = IEEE1284_MODE_COMPAT;
1751
1752 chr = qemu_chr_alloc();
1753 chr->chr_write = null_chr_write;
1754 chr->chr_ioctl = pp_ioctl;
1755 chr->chr_close = pp_close;
1756 chr->opaque = drv;
1757
1758 return chr;
1759 }
1760 #endif /* __linux__ */
1761
1762 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1763
1764 #define HAVE_CHARDEV_PARPORT 1
1765
1766 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1767 {
1768 int fd = (int)(intptr_t)chr->opaque;
1769 uint8_t b;
1770
1771 switch(cmd) {
1772 case CHR_IOCTL_PP_READ_DATA:
1773 if (ioctl(fd, PPIGDATA, &b) < 0)
1774 return -ENOTSUP;
1775 *(uint8_t *)arg = b;
1776 break;
1777 case CHR_IOCTL_PP_WRITE_DATA:
1778 b = *(uint8_t *)arg;
1779 if (ioctl(fd, PPISDATA, &b) < 0)
1780 return -ENOTSUP;
1781 break;
1782 case CHR_IOCTL_PP_READ_CONTROL:
1783 if (ioctl(fd, PPIGCTRL, &b) < 0)
1784 return -ENOTSUP;
1785 *(uint8_t *)arg = b;
1786 break;
1787 case CHR_IOCTL_PP_WRITE_CONTROL:
1788 b = *(uint8_t *)arg;
1789 if (ioctl(fd, PPISCTRL, &b) < 0)
1790 return -ENOTSUP;
1791 break;
1792 case CHR_IOCTL_PP_READ_STATUS:
1793 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1794 return -ENOTSUP;
1795 *(uint8_t *)arg = b;
1796 break;
1797 default:
1798 return -ENOTSUP;
1799 }
1800 return 0;
1801 }
1802
1803 static CharDriverState *qemu_chr_open_pp_fd(int fd)
1804 {
1805 CharDriverState *chr;
1806
1807 chr = qemu_chr_alloc();
1808 chr->opaque = (void *)(intptr_t)fd;
1809 chr->chr_write = null_chr_write;
1810 chr->chr_ioctl = pp_ioctl;
1811 chr->explicit_be_open = true;
1812 return chr;
1813 }
1814 #endif
1815
1816 #else /* _WIN32 */
1817
1818 typedef struct {
1819 int max_size;
1820 HANDLE hcom, hrecv, hsend;
1821 OVERLAPPED orecv;
1822 BOOL fpipe;
1823 DWORD len;
1824
1825 /* Protected by the CharDriverState chr_write_lock. */
1826 OVERLAPPED osend;
1827 } WinCharState;
1828
1829 typedef struct {
1830 HANDLE hStdIn;
1831 HANDLE hInputReadyEvent;
1832 HANDLE hInputDoneEvent;
1833 HANDLE hInputThread;
1834 uint8_t win_stdio_buf;
1835 } WinStdioCharState;
1836
1837 #define NSENDBUF 2048
1838 #define NRECVBUF 2048
1839 #define MAXCONNECT 1
1840 #define NTIMEOUT 5000
1841
1842 static int win_chr_poll(void *opaque);
1843 static int win_chr_pipe_poll(void *opaque);
1844
1845 static void win_chr_close(CharDriverState *chr)
1846 {
1847 WinCharState *s = chr->opaque;
1848
1849 if (s->hsend) {
1850 CloseHandle(s->hsend);
1851 s->hsend = NULL;
1852 }
1853 if (s->hrecv) {
1854 CloseHandle(s->hrecv);
1855 s->hrecv = NULL;
1856 }
1857 if (s->hcom) {
1858 CloseHandle(s->hcom);
1859 s->hcom = NULL;
1860 }
1861 if (s->fpipe)
1862 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1863 else
1864 qemu_del_polling_cb(win_chr_poll, chr);
1865
1866 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1867 }
1868
1869 static int win_chr_init(CharDriverState *chr, const char *filename)
1870 {
1871 WinCharState *s = chr->opaque;
1872 COMMCONFIG comcfg;
1873 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1874 COMSTAT comstat;
1875 DWORD size;
1876 DWORD err;
1877
1878 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1879 if (!s->hsend) {
1880 fprintf(stderr, "Failed CreateEvent\n");
1881 goto fail;
1882 }
1883 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1884 if (!s->hrecv) {
1885 fprintf(stderr, "Failed CreateEvent\n");
1886 goto fail;
1887 }
1888
1889 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1890 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1891 if (s->hcom == INVALID_HANDLE_VALUE) {
1892 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1893 s->hcom = NULL;
1894 goto fail;
1895 }
1896
1897 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1898 fprintf(stderr, "Failed SetupComm\n");
1899 goto fail;
1900 }
1901
1902 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1903 size = sizeof(COMMCONFIG);
1904 GetDefaultCommConfig(filename, &comcfg, &size);
1905 comcfg.dcb.DCBlength = sizeof(DCB);
1906 CommConfigDialog(filename, NULL, &comcfg);
1907
1908 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1909 fprintf(stderr, "Failed SetCommState\n");
1910 goto fail;
1911 }
1912
1913 if (!SetCommMask(s->hcom, EV_ERR)) {
1914 fprintf(stderr, "Failed SetCommMask\n");
1915 goto fail;
1916 }
1917
1918 cto.ReadIntervalTimeout = MAXDWORD;
1919 if (!SetCommTimeouts(s->hcom, &cto)) {
1920 fprintf(stderr, "Failed SetCommTimeouts\n");
1921 goto fail;
1922 }
1923
1924 if (!ClearCommError(s->hcom, &err, &comstat)) {
1925 fprintf(stderr, "Failed ClearCommError\n");
1926 goto fail;
1927 }
1928 qemu_add_polling_cb(win_chr_poll, chr);
1929 return 0;
1930
1931 fail:
1932 win_chr_close(chr);
1933 return -1;
1934 }
1935
1936 /* Called with chr_write_lock held. */
1937 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1938 {
1939 WinCharState *s = chr->opaque;
1940 DWORD len, ret, size, err;
1941
1942 len = len1;
1943 ZeroMemory(&s->osend, sizeof(s->osend));
1944 s->osend.hEvent = s->hsend;
1945 while (len > 0) {
1946 if (s->hsend)
1947 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1948 else
1949 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1950 if (!ret) {
1951 err = GetLastError();
1952 if (err == ERROR_IO_PENDING) {
1953 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1954 if (ret) {
1955 buf += size;
1956 len -= size;
1957 } else {
1958 break;
1959 }
1960 } else {
1961 break;
1962 }
1963 } else {
1964 buf += size;
1965 len -= size;
1966 }
1967 }
1968 return len1 - len;
1969 }
1970
1971 static int win_chr_read_poll(CharDriverState *chr)
1972 {
1973 WinCharState *s = chr->opaque;
1974
1975 s->max_size = qemu_chr_be_can_write(chr);
1976 return s->max_size;
1977 }
1978
1979 static void win_chr_readfile(CharDriverState *chr)
1980 {
1981 WinCharState *s = chr->opaque;
1982 int ret, err;
1983 uint8_t buf[READ_BUF_LEN];
1984 DWORD size;
1985
1986 ZeroMemory(&s->orecv, sizeof(s->orecv));
1987 s->orecv.hEvent = s->hrecv;
1988 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1989 if (!ret) {
1990 err = GetLastError();
1991 if (err == ERROR_IO_PENDING) {
1992 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1993 }
1994 }
1995
1996 if (size > 0) {
1997 qemu_chr_be_write(chr, buf, size);
1998 }
1999 }
2000
2001 static void win_chr_read(CharDriverState *chr)
2002 {
2003 WinCharState *s = chr->opaque;
2004
2005 if (s->len > s->max_size)
2006 s->len = s->max_size;
2007 if (s->len == 0)
2008 return;
2009
2010 win_chr_readfile(chr);
2011 }
2012
2013 static int win_chr_poll(void *opaque)
2014 {
2015 CharDriverState *chr = opaque;
2016 WinCharState *s = chr->opaque;
2017 COMSTAT status;
2018 DWORD comerr;
2019
2020 ClearCommError(s->hcom, &comerr, &status);
2021 if (status.cbInQue > 0) {
2022 s->len = status.cbInQue;
2023 win_chr_read_poll(chr);
2024 win_chr_read(chr);
2025 return 1;
2026 }
2027 return 0;
2028 }
2029
2030 static CharDriverState *qemu_chr_open_win_path(const char *filename)
2031 {
2032 CharDriverState *chr;
2033 WinCharState *s;
2034
2035 chr = qemu_chr_alloc();
2036 s = g_malloc0(sizeof(WinCharState));
2037 chr->opaque = s;
2038 chr->chr_write = win_chr_write;
2039 chr->chr_close = win_chr_close;
2040
2041 if (win_chr_init(chr, filename) < 0) {
2042 g_free(s);
2043 g_free(chr);
2044 return NULL;
2045 }
2046 return chr;
2047 }
2048
2049 static int win_chr_pipe_poll(void *opaque)
2050 {
2051 CharDriverState *chr = opaque;
2052 WinCharState *s = chr->opaque;
2053 DWORD size;
2054
2055 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
2056 if (size > 0) {
2057 s->len = size;
2058 win_chr_read_poll(chr);
2059 win_chr_read(chr);
2060 return 1;
2061 }
2062 return 0;
2063 }
2064
2065 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
2066 {
2067 WinCharState *s = chr->opaque;
2068 OVERLAPPED ov;
2069 int ret;
2070 DWORD size;
2071 char openname[CHR_MAX_FILENAME_SIZE];
2072
2073 s->fpipe = TRUE;
2074
2075 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
2076 if (!s->hsend) {
2077 fprintf(stderr, "Failed CreateEvent\n");
2078 goto fail;
2079 }
2080 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
2081 if (!s->hrecv) {
2082 fprintf(stderr, "Failed CreateEvent\n");
2083 goto fail;
2084 }
2085
2086 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
2087 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
2088 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
2089 PIPE_WAIT,
2090 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
2091 if (s->hcom == INVALID_HANDLE_VALUE) {
2092 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
2093 s->hcom = NULL;
2094 goto fail;
2095 }
2096
2097 ZeroMemory(&ov, sizeof(ov));
2098 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
2099 ret = ConnectNamedPipe(s->hcom, &ov);
2100 if (ret) {
2101 fprintf(stderr, "Failed ConnectNamedPipe\n");
2102 goto fail;
2103 }
2104
2105 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
2106 if (!ret) {
2107 fprintf(stderr, "Failed GetOverlappedResult\n");
2108 if (ov.hEvent) {
2109 CloseHandle(ov.hEvent);
2110 ov.hEvent = NULL;
2111 }
2112 goto fail;
2113 }
2114
2115 if (ov.hEvent) {
2116 CloseHandle(ov.hEvent);
2117 ov.hEvent = NULL;
2118 }
2119 qemu_add_polling_cb(win_chr_pipe_poll, chr);
2120 return 0;
2121
2122 fail:
2123 win_chr_close(chr);
2124 return -1;
2125 }
2126
2127
2128 static CharDriverState *qemu_chr_open_pipe(ChardevHostdev *opts)
2129 {
2130 const char *filename = opts->device;
2131 CharDriverState *chr;
2132 WinCharState *s;
2133
2134 chr = qemu_chr_alloc();
2135 s = g_malloc0(sizeof(WinCharState));
2136 chr->opaque = s;
2137 chr->chr_write = win_chr_write;
2138 chr->chr_close = win_chr_close;
2139
2140 if (win_chr_pipe_init(chr, filename) < 0) {
2141 g_free(s);
2142 g_free(chr);
2143 return NULL;
2144 }
2145 return chr;
2146 }
2147
2148 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
2149 {
2150 CharDriverState *chr;
2151 WinCharState *s;
2152
2153 chr = qemu_chr_alloc();
2154 s = g_malloc0(sizeof(WinCharState));
2155 s->hcom = fd_out;
2156 chr->opaque = s;
2157 chr->chr_write = win_chr_write;
2158 return chr;
2159 }
2160
2161 static CharDriverState *qemu_chr_open_win_con(void)
2162 {
2163 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
2164 }
2165
2166 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
2167 {
2168 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
2169 DWORD dwSize;
2170 int len1;
2171
2172 len1 = len;
2173
2174 while (len1 > 0) {
2175 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
2176 break;
2177 }
2178 buf += dwSize;
2179 len1 -= dwSize;
2180 }
2181
2182 return len - len1;
2183 }
2184
2185 static void win_stdio_wait_func(void *opaque)
2186 {
2187 CharDriverState *chr = opaque;
2188 WinStdioCharState *stdio = chr->opaque;
2189 INPUT_RECORD buf[4];
2190 int ret;
2191 DWORD dwSize;
2192 int i;
2193
2194 ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize);
2195
2196 if (!ret) {
2197 /* Avoid error storm */
2198 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2199 return;
2200 }
2201
2202 for (i = 0; i < dwSize; i++) {
2203 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2204
2205 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2206 int j;
2207 if (kev->uChar.AsciiChar != 0) {
2208 for (j = 0; j < kev->wRepeatCount; j++) {
2209 if (qemu_chr_be_can_write(chr)) {
2210 uint8_t c = kev->uChar.AsciiChar;
2211 qemu_chr_be_write(chr, &c, 1);
2212 }
2213 }
2214 }
2215 }
2216 }
2217 }
2218
2219 static DWORD WINAPI win_stdio_thread(LPVOID param)
2220 {
2221 CharDriverState *chr = param;
2222 WinStdioCharState *stdio = chr->opaque;
2223 int ret;
2224 DWORD dwSize;
2225
2226 while (1) {
2227
2228 /* Wait for one byte */
2229 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2230
2231 /* Exit in case of error, continue if nothing read */
2232 if (!ret) {
2233 break;
2234 }
2235 if (!dwSize) {
2236 continue;
2237 }
2238
2239 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2240 if (stdio->win_stdio_buf == '\r') {
2241 continue;
2242 }
2243
2244 /* Signal the main thread and wait until the byte was eaten */
2245 if (!SetEvent(stdio->hInputReadyEvent)) {
2246 break;
2247 }
2248 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2249 != WAIT_OBJECT_0) {
2250 break;
2251 }
2252 }
2253
2254 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2255 return 0;
2256 }
2257
2258 static void win_stdio_thread_wait_func(void *opaque)
2259 {
2260 CharDriverState *chr = opaque;
2261 WinStdioCharState *stdio = chr->opaque;
2262
2263 if (qemu_chr_be_can_write(chr)) {
2264 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2265 }
2266
2267 SetEvent(stdio->hInputDoneEvent);
2268 }
2269
2270 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
2271 {
2272 WinStdioCharState *stdio = chr->opaque;
2273 DWORD dwMode = 0;
2274
2275 GetConsoleMode(stdio->hStdIn, &dwMode);
2276
2277 if (echo) {
2278 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2279 } else {
2280 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2281 }
2282 }
2283
2284 static void win_stdio_close(CharDriverState *chr)
2285 {
2286 WinStdioCharState *stdio = chr->opaque;
2287
2288 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2289 CloseHandle(stdio->hInputReadyEvent);
2290 }
2291 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2292 CloseHandle(stdio->hInputDoneEvent);
2293 }
2294 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2295 TerminateThread(stdio->hInputThread, 0);
2296 }
2297
2298 g_free(chr->opaque);
2299 g_free(chr);
2300 }
2301
2302 static CharDriverState *qemu_chr_open_stdio(ChardevStdio *opts)
2303 {
2304 CharDriverState *chr;
2305 WinStdioCharState *stdio;
2306 DWORD dwMode;
2307 int is_console = 0;
2308
2309 chr = qemu_chr_alloc();
2310 stdio = g_malloc0(sizeof(WinStdioCharState));
2311
2312 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2313 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
2314 fprintf(stderr, "cannot open stdio: invalid handle\n");
2315 exit(1);
2316 }
2317
2318 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2319
2320 chr->opaque = stdio;
2321 chr->chr_write = win_stdio_write;
2322 chr->chr_close = win_stdio_close;
2323
2324 if (is_console) {
2325 if (qemu_add_wait_object(stdio->hStdIn,
2326 win_stdio_wait_func, chr)) {
2327 fprintf(stderr, "qemu_add_wait_object: failed\n");
2328 }
2329 } else {
2330 DWORD dwId;
2331
2332 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2333 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2334 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2335 chr, 0, &dwId);
2336
2337 if (stdio->hInputThread == INVALID_HANDLE_VALUE
2338 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
2339 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
2340 fprintf(stderr, "cannot create stdio thread or event\n");
2341 exit(1);
2342 }
2343 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2344 win_stdio_thread_wait_func, chr)) {
2345 fprintf(stderr, "qemu_add_wait_object: failed\n");
2346 }
2347 }
2348
2349 dwMode |= ENABLE_LINE_INPUT;
2350
2351 if (is_console) {
2352 /* set the terminal in raw mode */
2353 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2354 dwMode |= ENABLE_PROCESSED_INPUT;
2355 }
2356
2357 SetConsoleMode(stdio->hStdIn, dwMode);
2358
2359 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2360 qemu_chr_fe_set_echo(chr, false);
2361
2362 return chr;
2363 }
2364 #endif /* !_WIN32 */
2365
2366
2367 /***********************************************************/
2368 /* UDP Net console */
2369
2370 typedef struct {
2371 int fd;
2372 GIOChannel *chan;
2373 uint8_t buf[READ_BUF_LEN];
2374 int bufcnt;
2375 int bufptr;
2376 int max_size;
2377 } NetCharDriver;
2378
2379 /* Called with chr_write_lock held. */
2380 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2381 {
2382 NetCharDriver *s = chr->opaque;
2383 gsize bytes_written;
2384 GIOStatus status;
2385
2386 status = g_io_channel_write_chars(s->chan, (const gchar *)buf, len, &bytes_written, NULL);
2387 if (status == G_IO_STATUS_EOF) {
2388 return 0;
2389 } else if (status != G_IO_STATUS_NORMAL) {
2390 return -1;
2391 }
2392
2393 return bytes_written;
2394 }
2395
2396 static int udp_chr_read_poll(void *opaque)
2397 {
2398 CharDriverState *chr = opaque;
2399 NetCharDriver *s = chr->opaque;
2400
2401 s->max_size = qemu_chr_be_can_write(chr);
2402
2403 /* If there were any stray characters in the queue process them
2404 * first
2405 */
2406 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2407 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2408 s->bufptr++;
2409 s->max_size = qemu_chr_be_can_write(chr);
2410 }
2411 return s->max_size;
2412 }
2413
2414 static gboolean udp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2415 {
2416 CharDriverState *chr = opaque;
2417 NetCharDriver *s = chr->opaque;
2418 gsize bytes_read = 0;
2419 GIOStatus status;
2420
2421 if (s->max_size == 0) {
2422 return TRUE;
2423 }
2424 status = g_io_channel_read_chars(s->chan, (gchar *)s->buf, sizeof(s->buf),
2425 &bytes_read, NULL);
2426 s->bufcnt = bytes_read;
2427 s->bufptr = s->bufcnt;
2428 if (status != G_IO_STATUS_NORMAL) {
2429 remove_fd_in_watch(chr);
2430 return FALSE;
2431 }
2432
2433 s->bufptr = 0;
2434 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2435 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2436 s->bufptr++;
2437 s->max_size = qemu_chr_be_can_write(chr);
2438 }
2439
2440 return TRUE;
2441 }
2442
2443 static void udp_chr_update_read_handler(CharDriverState *chr)
2444 {
2445 NetCharDriver *s = chr->opaque;
2446
2447 remove_fd_in_watch(chr);
2448 if (s->chan) {
2449 chr->fd_in_tag = io_add_watch_poll(s->chan, udp_chr_read_poll,
2450 udp_chr_read, chr);
2451 }
2452 }
2453
2454 static void udp_chr_close(CharDriverState *chr)
2455 {
2456 NetCharDriver *s = chr->opaque;
2457
2458 remove_fd_in_watch(chr);
2459 if (s->chan) {
2460 g_io_channel_unref(s->chan);
2461 closesocket(s->fd);
2462 }
2463 g_free(s);
2464 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2465 }
2466
2467 static CharDriverState *qemu_chr_open_udp_fd(int fd)
2468 {
2469 CharDriverState *chr = NULL;
2470 NetCharDriver *s = NULL;
2471
2472 chr = qemu_chr_alloc();
2473 s = g_malloc0(sizeof(NetCharDriver));
2474
2475 s->fd = fd;
2476 s->chan = io_channel_from_socket(s->fd);
2477 s->bufcnt = 0;
2478 s->bufptr = 0;
2479 chr->opaque = s;
2480 chr->chr_write = udp_chr_write;
2481 chr->chr_update_read_handler = udp_chr_update_read_handler;
2482 chr->chr_close = udp_chr_close;
2483 /* be isn't opened until we get a connection */
2484 chr->explicit_be_open = true;
2485 return chr;
2486 }
2487
2488 /***********************************************************/
2489 /* TCP Net console */
2490
2491 typedef struct {
2492
2493 GIOChannel *chan, *listen_chan;
2494 guint listen_tag;
2495 int fd, listen_fd;
2496 int connected;
2497 int max_size;
2498 int do_telnetopt;
2499 int do_nodelay;
2500 int is_unix;
2501 int *read_msgfds;
2502 int read_msgfds_num;
2503 int *write_msgfds;
2504 int write_msgfds_num;
2505
2506 SocketAddress *addr;
2507 bool is_listen;
2508 bool is_telnet;
2509
2510 guint reconnect_timer;
2511 int64_t reconnect_time;
2512 bool connect_err_reported;
2513 } TCPCharDriver;
2514
2515 static gboolean socket_reconnect_timeout(gpointer opaque);
2516
2517 static void qemu_chr_socket_restart_timer(CharDriverState *chr)
2518 {
2519 TCPCharDriver *s = chr->opaque;
2520 assert(s->connected == 0);
2521 s->reconnect_timer = g_timeout_add_seconds(s->reconnect_time,
2522 socket_reconnect_timeout, chr);
2523 }
2524
2525 static void check_report_connect_error(CharDriverState *chr,
2526 Error *err)
2527 {
2528 TCPCharDriver *s = chr->opaque;
2529
2530 if (!s->connect_err_reported) {
2531 error_report("Unable to connect character device %s: %s",
2532 chr->label, error_get_pretty(err));
2533 s->connect_err_reported = true;
2534 }
2535 qemu_chr_socket_restart_timer(chr);
2536 }
2537
2538 static gboolean tcp_chr_accept(GIOChannel *chan, GIOCondition cond, void *opaque);
2539
2540 #ifndef _WIN32
2541 static int unix_send_msgfds(CharDriverState *chr, const uint8_t *buf, int len)
2542 {
2543 TCPCharDriver *s = chr->opaque;
2544 struct msghdr msgh;
2545 struct iovec iov;
2546 int r;
2547
2548 size_t fd_size = s->write_msgfds_num * sizeof(int);
2549 char control[CMSG_SPACE(fd_size)];
2550 struct cmsghdr *cmsg;
2551
2552 memset(&msgh, 0, sizeof(msgh));
2553 memset(control, 0, sizeof(control));
2554
2555 /* set the payload */
2556 iov.iov_base = (uint8_t *) buf;
2557 iov.iov_len = len;
2558
2559 msgh.msg_iov = &iov;
2560 msgh.msg_iovlen = 1;
2561
2562 msgh.msg_control = control;
2563 msgh.msg_controllen = sizeof(control);
2564
2565 cmsg = CMSG_FIRSTHDR(&msgh);
2566
2567 cmsg->cmsg_len = CMSG_LEN(fd_size);
2568 cmsg->cmsg_level = SOL_SOCKET;
2569 cmsg->cmsg_type = SCM_RIGHTS;
2570 memcpy(CMSG_DATA(cmsg), s->write_msgfds, fd_size);
2571
2572 do {
2573 r = sendmsg(s->fd, &msgh, 0);
2574 } while (r < 0 && errno == EINTR);
2575
2576 /* free the written msgfds, no matter what */
2577 if (s->write_msgfds_num) {
2578 g_free(s->write_msgfds);
2579 s->write_msgfds = 0;
2580 s->write_msgfds_num = 0;
2581 }
2582
2583 return r;
2584 }
2585 #endif
2586
2587 /* Called with chr_write_lock held. */
2588 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2589 {
2590 TCPCharDriver *s = chr->opaque;
2591 if (s->connected) {
2592 #ifndef _WIN32
2593 if (s->is_unix && s->write_msgfds_num) {
2594 return unix_send_msgfds(chr, buf, len);
2595 } else
2596 #endif
2597 {
2598 return io_channel_send(s->chan, buf, len);
2599 }
2600 } else {
2601 /* XXX: indicate an error ? */
2602 return len;
2603 }
2604 }
2605
2606 static int tcp_chr_read_poll(void *opaque)
2607 {
2608 CharDriverState *chr = opaque;
2609 TCPCharDriver *s = chr->opaque;
2610 if (!s->connected)
2611 return 0;
2612 s->max_size = qemu_chr_be_can_write(chr);
2613 return s->max_size;
2614 }
2615
2616 #define IAC 255
2617 #define IAC_BREAK 243
2618 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2619 TCPCharDriver *s,
2620 uint8_t *buf, int *size)
2621 {
2622 /* Handle any telnet client's basic IAC options to satisfy char by
2623 * char mode with no echo. All IAC options will be removed from
2624 * the buf and the do_telnetopt variable will be used to track the
2625 * state of the width of the IAC information.
2626 *
2627 * IAC commands come in sets of 3 bytes with the exception of the
2628 * "IAC BREAK" command and the double IAC.
2629 */
2630
2631 int i;
2632 int j = 0;
2633
2634 for (i = 0; i < *size; i++) {
2635 if (s->do_telnetopt > 1) {
2636 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2637 /* Double IAC means send an IAC */
2638 if (j != i)
2639 buf[j] = buf[i];
2640 j++;
2641 s->do_telnetopt = 1;
2642 } else {
2643 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2644 /* Handle IAC break commands by sending a serial break */
2645 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2646 s->do_telnetopt++;
2647 }
2648 s->do_telnetopt++;
2649 }
2650 if (s->do_telnetopt >= 4) {
2651 s->do_telnetopt = 1;
2652 }
2653 } else {
2654 if ((unsigned char)buf[i] == IAC) {
2655 s->do_telnetopt = 2;
2656 } else {
2657 if (j != i)
2658 buf[j] = buf[i];
2659 j++;
2660 }
2661 }
2662 }
2663 *size = j;
2664 }
2665
2666 static int tcp_get_msgfds(CharDriverState *chr, int *fds, int num)
2667 {
2668 TCPCharDriver *s = chr->opaque;
2669 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
2670
2671 if (to_copy) {
2672 int i;
2673
2674 memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
2675
2676 /* Close unused fds */
2677 for (i = to_copy; i < s->read_msgfds_num; i++) {
2678 close(s->read_msgfds[i]);
2679 }
2680
2681 g_free(s->read_msgfds);
2682 s->read_msgfds = 0;
2683 s->read_msgfds_num = 0;
2684 }
2685
2686 return to_copy;
2687 }
2688
2689 static int tcp_set_msgfds(CharDriverState *chr, int *fds, int num)
2690 {
2691 TCPCharDriver *s = chr->opaque;
2692
2693 /* clear old pending fd array */
2694 if (s->write_msgfds) {
2695 g_free(s->write_msgfds);
2696 }
2697
2698 if (num) {
2699 s->write_msgfds = g_malloc(num * sizeof(int));
2700 memcpy(s->write_msgfds, fds, num * sizeof(int));
2701 }
2702
2703 s->write_msgfds_num = num;
2704
2705 return 0;
2706 }
2707
2708 #ifndef _WIN32
2709 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2710 {
2711 TCPCharDriver *s = chr->opaque;
2712 struct cmsghdr *cmsg;
2713
2714 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2715 int fd_size, i;
2716
2717 if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) ||
2718 cmsg->cmsg_level != SOL_SOCKET ||
2719 cmsg->cmsg_type != SCM_RIGHTS) {
2720 continue;
2721 }
2722
2723 fd_size = cmsg->cmsg_len - CMSG_LEN(0);
2724
2725 if (!fd_size) {
2726 continue;
2727 }
2728
2729 /* close and clean read_msgfds */
2730 for (i = 0; i < s->read_msgfds_num; i++) {
2731 close(s->read_msgfds[i]);
2732 }
2733
2734 if (s->read_msgfds_num) {
2735 g_free(s->read_msgfds);
2736 }
2737
2738 s->read_msgfds_num = fd_size / sizeof(int);
2739 s->read_msgfds = g_malloc(fd_size);
2740 memcpy(s->read_msgfds, CMSG_DATA(cmsg), fd_size);
2741
2742 for (i = 0; i < s->read_msgfds_num; i++) {
2743 int fd = s->read_msgfds[i];
2744 if (fd < 0) {
2745 continue;
2746 }
2747
2748 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
2749 qemu_set_block(fd);
2750
2751 #ifndef MSG_CMSG_CLOEXEC
2752 qemu_set_cloexec(fd);
2753 #endif
2754 }
2755 }
2756 }
2757
2758 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2759 {
2760 TCPCharDriver *s = chr->opaque;
2761 struct msghdr msg = { NULL, };
2762 struct iovec iov[1];
2763 union {
2764 struct cmsghdr cmsg;
2765 char control[CMSG_SPACE(sizeof(int))];
2766 } msg_control;
2767 int flags = 0;
2768 ssize_t ret;
2769
2770 iov[0].iov_base = buf;
2771 iov[0].iov_len = len;
2772
2773 msg.msg_iov = iov;
2774 msg.msg_iovlen = 1;
2775 msg.msg_control = &msg_control;
2776 msg.msg_controllen = sizeof(msg_control);
2777
2778 #ifdef MSG_CMSG_CLOEXEC
2779 flags |= MSG_CMSG_CLOEXEC;
2780 #endif
2781 ret = recvmsg(s->fd, &msg, flags);
2782 if (ret > 0 && s->is_unix) {
2783 unix_process_msgfd(chr, &msg);
2784 }
2785
2786 return ret;
2787 }
2788 #else
2789 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2790 {
2791 TCPCharDriver *s = chr->opaque;
2792 return qemu_recv(s->fd, buf, len, 0);
2793 }
2794 #endif
2795
2796 static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond)
2797 {
2798 TCPCharDriver *s = chr->opaque;
2799 return g_io_create_watch(s->chan, cond);
2800 }
2801
2802 static void tcp_chr_disconnect(CharDriverState *chr)
2803 {
2804 TCPCharDriver *s = chr->opaque;
2805
2806 s->connected = 0;
2807 if (s->listen_chan) {
2808 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN,
2809 tcp_chr_accept, chr);
2810 }
2811 remove_fd_in_watch(chr);
2812 g_io_channel_unref(s->chan);
2813 s->chan = NULL;
2814 closesocket(s->fd);
2815 s->fd = -1;
2816 SocketAddress_to_str(chr->filename, CHR_MAX_FILENAME_SIZE,
2817 "disconnected:", s->addr, s->is_listen, s->is_telnet);
2818 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2819 if (s->reconnect_time) {
2820 qemu_chr_socket_restart_timer(chr);
2821 }
2822 }
2823
2824 static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
2825 {
2826 CharDriverState *chr = opaque;
2827 TCPCharDriver *s = chr->opaque;
2828 uint8_t buf[READ_BUF_LEN];
2829 int len, size;
2830
2831 if (cond & G_IO_HUP) {
2832 /* connection closed */
2833 tcp_chr_disconnect(chr);
2834 return TRUE;
2835 }
2836
2837 if (!s->connected || s->max_size <= 0) {
2838 return TRUE;
2839 }
2840 len = sizeof(buf);
2841 if (len > s->max_size)
2842 len = s->max_size;
2843 size = tcp_chr_recv(chr, (void *)buf, len);
2844 if (size == 0) {
2845 /* connection closed */
2846 tcp_chr_disconnect(chr);
2847 } else if (size > 0) {
2848 if (s->do_telnetopt)
2849 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2850 if (size > 0)
2851 qemu_chr_be_write(chr, buf, size);
2852 }
2853
2854 return TRUE;
2855 }
2856
2857 static int tcp_chr_sync_read(CharDriverState *chr, const uint8_t *buf, int len)
2858 {
2859 TCPCharDriver *s = chr->opaque;
2860 int size;
2861
2862 if (!s->connected) {
2863 return 0;
2864 }
2865
2866 size = tcp_chr_recv(chr, (void *) buf, len);
2867 if (size == 0) {
2868 /* connection closed */
2869 tcp_chr_disconnect(chr);
2870 }
2871
2872 return size;
2873 }
2874
2875 #ifndef _WIN32
2876 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2877 {
2878 CharDriverState *chr = qemu_chr_open_fd(eventfd, eventfd);
2879
2880 if (chr) {
2881 chr->avail_connections = 1;
2882 }
2883
2884 return chr;
2885 }
2886 #endif
2887
2888 static void tcp_chr_connect(void *opaque)
2889 {
2890 CharDriverState *chr = opaque;
2891 TCPCharDriver *s = chr->opaque;
2892 struct sockaddr_storage ss, ps;
2893 socklen_t ss_len = sizeof(ss), ps_len = sizeof(ps);
2894
2895 memset(&ss, 0, ss_len);
2896 if (getsockname(s->fd, (struct sockaddr *) &ss, &ss_len) != 0) {
2897 snprintf(chr->filename, CHR_MAX_FILENAME_SIZE,
2898 "Error in getsockname: %s\n", strerror(errno));
2899 } else if (getpeername(s->fd, (struct sockaddr *) &ps, &ps_len) != 0) {
2900 snprintf(chr->filename, CHR_MAX_FILENAME_SIZE,
2901 "Error in getpeername: %s\n", strerror(errno));
2902 } else {
2903 sockaddr_to_str(chr->filename, CHR_MAX_FILENAME_SIZE,
2904 &ss, ss_len, &ps, ps_len,
2905 s->is_listen, s->is_telnet);
2906 }
2907
2908 s->connected = 1;
2909 if (s->chan) {
2910 chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
2911 tcp_chr_read, chr);
2912 }
2913 qemu_chr_be_generic_open(chr);
2914 }
2915
2916 static void tcp_chr_update_read_handler(CharDriverState *chr)
2917 {
2918 TCPCharDriver *s = chr->opaque;
2919
2920 remove_fd_in_watch(chr);
2921 if (s->chan) {
2922 chr->fd_in_tag = io_add_watch_poll(s->chan, tcp_chr_read_poll,
2923 tcp_chr_read, chr);
2924 }
2925 }
2926
2927 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2928 static void tcp_chr_telnet_init(int fd)
2929 {
2930 char buf[3];
2931 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2932 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2933 send(fd, (char *)buf, 3, 0);
2934 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2935 send(fd, (char *)buf, 3, 0);
2936 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2937 send(fd, (char *)buf, 3, 0);
2938 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2939 send(fd, (char *)buf, 3, 0);
2940 }
2941
2942 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2943 {
2944 TCPCharDriver *s = chr->opaque;
2945 if (s->fd != -1)
2946 return -1;
2947
2948 qemu_set_nonblock(fd);
2949 if (s->do_nodelay)
2950 socket_set_nodelay(fd);
2951 s->fd = fd;
2952 s->chan = io_channel_from_socket(fd);
2953 if (s->listen_tag) {
2954 g_source_remove(s->listen_tag);
2955 s->listen_tag = 0;
2956 }
2957 tcp_chr_connect(chr);
2958
2959 return 0;
2960 }
2961
2962 static gboolean tcp_chr_accept(GIOChannel *channel, GIOCondition cond, void *opaque)
2963 {
2964 CharDriverState *chr = opaque;
2965 TCPCharDriver *s = chr->opaque;
2966 struct sockaddr_in saddr;
2967 #ifndef _WIN32
2968 struct sockaddr_un uaddr;
2969 #endif
2970 struct sockaddr *addr;
2971 socklen_t len;
2972 int fd;
2973
2974 for(;;) {
2975 #ifndef _WIN32
2976 if (s->is_unix) {
2977 len = sizeof(uaddr);
2978 addr = (struct sockaddr *)&uaddr;
2979 } else
2980 #endif
2981 {
2982 len = sizeof(saddr);
2983 addr = (struct sockaddr *)&saddr;
2984 }
2985 fd = qemu_accept(s->listen_fd, addr, &len);
2986 if (fd < 0 && errno != EINTR) {
2987 s->listen_tag = 0;
2988 return FALSE;
2989 } else if (fd >= 0) {
2990 if (s->do_telnetopt)
2991 tcp_chr_telnet_init(fd);
2992 break;
2993 }
2994 }
2995 if (tcp_chr_add_client(chr, fd) < 0)
2996 close(fd);
2997
2998 return TRUE;
2999 }
3000
3001 static void tcp_chr_close(CharDriverState *chr)
3002 {
3003 TCPCharDriver *s = chr->opaque;
3004 int i;
3005
3006 if (s->reconnect_timer) {
3007 g_source_remove(s->reconnect_timer);
3008 s->reconnect_timer = 0;
3009 }
3010 qapi_free_SocketAddress(s->addr);
3011 if (s->fd >= 0) {
3012 remove_fd_in_watch(chr);
3013 if (s->chan) {
3014 g_io_channel_unref(s->chan);
3015 }
3016 closesocket(s->fd);
3017 }
3018 if (s->listen_fd >= 0) {
3019 if (s->listen_tag) {
3020 g_source_remove(s->listen_tag);
3021 s->listen_tag = 0;
3022 }
3023 if (s->listen_chan) {
3024 g_io_channel_unref(s->listen_chan);
3025 }
3026 closesocket(s->listen_fd);
3027 }
3028 if (s->read_msgfds_num) {
3029 for (i = 0; i < s->read_msgfds_num; i++) {
3030 close(s->read_msgfds[i]);
3031 }
3032 g_free(s->read_msgfds);
3033 }
3034 if (s->write_msgfds_num) {
3035 g_free(s->write_msgfds);
3036 }
3037 g_free(s);
3038 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
3039 }
3040
3041 static void qemu_chr_finish_socket_connection(CharDriverState *chr, int fd)
3042 {
3043 TCPCharDriver *s = chr->opaque;
3044
3045 if (s->is_listen) {
3046 s->listen_fd = fd;
3047 s->listen_chan = io_channel_from_socket(s->listen_fd);
3048 s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN,
3049 tcp_chr_accept, chr);
3050 } else {
3051 s->connected = 1;
3052 s->fd = fd;
3053 socket_set_nodelay(fd);
3054 s->chan = io_channel_from_socket(s->fd);
3055 tcp_chr_connect(chr);
3056 }
3057 }
3058
3059 static void qemu_chr_socket_connected(int fd, Error *err, void *opaque)
3060 {
3061 CharDriverState *chr = opaque;
3062 TCPCharDriver *s = chr->opaque;
3063
3064 if (fd < 0) {
3065 check_report_connect_error(chr, err);
3066 return;
3067 }
3068
3069 s->connect_err_reported = false;
3070 qemu_chr_finish_socket_connection(chr, fd);
3071 }
3072
3073 static bool qemu_chr_open_socket_fd(CharDriverState *chr, Error **errp)
3074 {
3075 TCPCharDriver *s = chr->opaque;
3076 int fd;
3077
3078 if (s->is_listen) {
3079 fd = socket_listen(s->addr, errp);
3080 } else if (s->reconnect_time) {
3081 fd = socket_connect(s->addr, errp, qemu_chr_socket_connected, chr);
3082 return fd >= 0;
3083 } else {
3084 fd = socket_connect(s->addr, errp, NULL, NULL);
3085 }
3086 if (fd < 0) {
3087 return false;
3088 }
3089
3090 qemu_chr_finish_socket_connection(chr, fd);
3091 return true;
3092 }
3093
3094 /*********************************************************/
3095 /* Ring buffer chardev */
3096
3097 typedef struct {
3098 size_t size;
3099 size_t prod;
3100 size_t cons;
3101 uint8_t *cbuf;
3102 } RingBufCharDriver;
3103
3104 static size_t ringbuf_count(const CharDriverState *chr)
3105 {
3106 const RingBufCharDriver *d = chr->opaque;
3107
3108 return d->prod - d->cons;
3109 }
3110
3111 /* Called with chr_write_lock held. */
3112 static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
3113 {
3114 RingBufCharDriver *d = chr->opaque;
3115 int i;
3116
3117 if (!buf || (len < 0)) {
3118 return -1;
3119 }
3120
3121 for (i = 0; i < len; i++ ) {
3122 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
3123 if (d->prod - d->cons > d->size) {
3124 d->cons = d->prod - d->size;
3125 }
3126 }
3127
3128 return 0;
3129 }
3130
3131 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)
3132 {
3133 RingBufCharDriver *d = chr->opaque;
3134 int i;
3135
3136 qemu_mutex_lock(&chr->chr_write_lock);
3137 for (i = 0; i < len && d->cons != d->prod; i++) {
3138 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
3139 }
3140 qemu_mutex_unlock(&chr->chr_write_lock);
3141
3142 return i;
3143 }
3144
3145 static void ringbuf_chr_close(struct CharDriverState *chr)
3146 {
3147 RingBufCharDriver *d = chr->opaque;
3148
3149 g_free(d->cbuf);
3150 g_free(d);
3151 chr->opaque = NULL;
3152 }
3153
3154 static CharDriverState *qemu_chr_open_ringbuf(ChardevRingbuf *opts,
3155 Error **errp)
3156 {
3157 CharDriverState *chr;
3158 RingBufCharDriver *d;
3159
3160 chr = qemu_chr_alloc();
3161 d = g_malloc(sizeof(*d));
3162
3163 d->size = opts->has_size ? opts->size : 65536;
3164
3165 /* The size must be power of 2 */
3166 if (d->size & (d->size - 1)) {
3167 error_setg(errp, "size of ringbuf chardev must be power of two");
3168 goto fail;
3169 }
3170
3171 d->prod = 0;
3172 d->cons = 0;
3173 d->cbuf = g_malloc0(d->size);
3174
3175 chr->opaque = d;
3176 chr->chr_write = ringbuf_chr_write;
3177 chr->chr_close = ringbuf_chr_close;
3178
3179 return chr;
3180
3181 fail:
3182 g_free(d);
3183 g_free(chr);
3184 return NULL;
3185 }
3186
3187 bool chr_is_ringbuf(const CharDriverState *chr)
3188 {
3189 return chr->chr_write == ringbuf_chr_write;
3190 }
3191
3192 void qmp_ringbuf_write(const char *device, const char *data,
3193 bool has_format, enum DataFormat format,
3194 Error **errp)
3195 {
3196 CharDriverState *chr;
3197 const uint8_t *write_data;
3198 int ret;
3199 gsize write_count;
3200
3201 chr = qemu_chr_find(device);
3202 if (!chr) {
3203 error_setg(errp, "Device '%s' not found", device);
3204 return;
3205 }
3206
3207 if (!chr_is_ringbuf(chr)) {
3208 error_setg(errp,"%s is not a ringbuf device", device);
3209 return;
3210 }
3211
3212 if (has_format && (format == DATA_FORMAT_BASE64)) {
3213 write_data = g_base64_decode(data, &write_count);
3214 } else {
3215 write_data = (uint8_t *)data;
3216 write_count = strlen(data);
3217 }
3218
3219 ret = ringbuf_chr_write(chr, write_data, write_count);
3220
3221 if (write_data != (uint8_t *)data) {
3222 g_free((void *)write_data);
3223 }
3224
3225 if (ret < 0) {
3226 error_setg(errp, "Failed to write to device %s", device);
3227 return;
3228 }
3229 }
3230
3231 char *qmp_ringbuf_read(const char *device, int64_t size,
3232 bool has_format, enum DataFormat format,
3233 Error **errp)
3234 {
3235 CharDriverState *chr;
3236 uint8_t *read_data;
3237 size_t count;
3238 char *data;
3239
3240 chr = qemu_chr_find(device);
3241 if (!chr) {
3242 error_setg(errp, "Device '%s' not found", device);
3243 return NULL;
3244 }
3245
3246 if (!chr_is_ringbuf(chr)) {
3247 error_setg(errp,"%s is not a ringbuf device", device);
3248 return NULL;
3249 }
3250
3251 if (size <= 0) {
3252 error_setg(errp, "size must be greater than zero");
3253 return NULL;
3254 }
3255
3256 count = ringbuf_count(chr);
3257 size = size > count ? count : size;
3258 read_data = g_malloc(size + 1);
3259
3260 ringbuf_chr_read(chr, read_data, size);
3261
3262 if (has_format && (format == DATA_FORMAT_BASE64)) {
3263 data = g_base64_encode(read_data, size);
3264 g_free(read_data);
3265 } else {
3266 /*
3267 * FIXME should read only complete, valid UTF-8 characters up
3268 * to @size bytes. Invalid sequences should be replaced by a
3269 * suitable replacement character. Except when (and only
3270 * when) ring buffer lost characters since last read, initial
3271 * continuation characters should be dropped.
3272 */
3273 read_data[size] = 0;
3274 data = (char *)read_data;
3275 }
3276
3277 return data;
3278 }
3279
3280 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
3281 {
3282 char host[65], port[33], width[8], height[8];
3283 int pos;
3284 const char *p;
3285 QemuOpts *opts;
3286 Error *local_err = NULL;
3287
3288 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
3289 if (local_err) {
3290 qerror_report_err(local_err);
3291 error_free(local_err);
3292 return NULL;
3293 }
3294
3295 if (strstart(filename, "mon:", &p)) {
3296 filename = p;
3297 qemu_opt_set(opts, "mux", "on");
3298 if (strcmp(filename, "stdio") == 0) {
3299 /* Monitor is muxed to stdio: do not exit on Ctrl+C by default
3300 * but pass it to the guest. Handle this only for compat syntax,
3301 * for -chardev syntax we have special option for this.
3302 * This is what -nographic did, redirecting+muxing serial+monitor
3303 * to stdio causing Ctrl+C to be passed to guest. */
3304 qemu_opt_set(opts, "signal", "off");
3305 }
3306 }
3307
3308 if (strcmp(filename, "null") == 0 ||
3309 strcmp(filename, "pty") == 0 ||
3310 strcmp(filename, "msmouse") == 0 ||
3311 strcmp(filename, "braille") == 0 ||
3312 strcmp(filename, "testdev") == 0 ||
3313 strcmp(filename, "stdio") == 0) {
3314 qemu_opt_set(opts, "backend", filename);
3315 return opts;
3316 }
3317 if (strstart(filename, "vc", &p)) {
3318 qemu_opt_set(opts, "backend", "vc");
3319 if (*p == ':') {
3320 if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
3321 /* pixels */
3322 qemu_opt_set(opts, "width", width);
3323 qemu_opt_set(opts, "height", height);
3324 } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
3325 /* chars */
3326 qemu_opt_set(opts, "cols", width);
3327 qemu_opt_set(opts, "rows", height);
3328 } else {
3329 goto fail;
3330 }
3331 }
3332 return opts;
3333 }
3334 if (strcmp(filename, "con:") == 0) {
3335 qemu_opt_set(opts, "backend", "console");
3336 return opts;
3337 }
3338 if (strstart(filename, "COM", NULL)) {
3339 qemu_opt_set(opts, "backend", "serial");
3340 qemu_opt_set(opts, "path", filename);
3341 return opts;
3342 }
3343 if (strstart(filename, "file:", &p)) {
3344 qemu_opt_set(opts, "backend", "file");
3345 qemu_opt_set(opts, "path", p);
3346 return opts;
3347 }
3348 if (strstart(filename, "pipe:", &p)) {
3349 qemu_opt_set(opts, "backend", "pipe");
3350 qemu_opt_set(opts, "path", p);
3351 return opts;
3352 }
3353 if (strstart(filename, "tcp:", &p) ||
3354 strstart(filename, "telnet:", &p)) {
3355 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3356 host[0] = 0;
3357 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3358 goto fail;
3359 }
3360 qemu_opt_set(opts, "backend", "socket");
3361 qemu_opt_set(opts, "host", host);
3362 qemu_opt_set(opts, "port", port);
3363 if (p[pos] == ',') {
3364 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
3365 goto fail;
3366 }
3367 if (strstart(filename, "telnet:", &p))
3368 qemu_opt_set(opts, "telnet", "on");
3369 return opts;
3370 }
3371 if (strstart(filename, "udp:", &p)) {
3372 qemu_opt_set(opts, "backend", "udp");
3373 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3374 host[0] = 0;
3375 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
3376 goto fail;
3377 }
3378 }
3379 qemu_opt_set(opts, "host", host);
3380 qemu_opt_set(opts, "port", port);
3381 if (p[pos] == '@') {
3382 p += pos + 1;
3383 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3384 host[0] = 0;
3385 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
3386 goto fail;
3387 }
3388 }
3389 qemu_opt_set(opts, "localaddr", host);
3390 qemu_opt_set(opts, "localport", port);
3391 }
3392 return opts;
3393 }
3394 if (strstart(filename, "unix:", &p)) {
3395 qemu_opt_set(opts, "backend", "socket");
3396 if (qemu_opts_do_parse(opts, p, "path") != 0)
3397 goto fail;
3398 return opts;
3399 }
3400 if (strstart(filename, "/dev/parport", NULL) ||
3401 strstart(filename, "/dev/ppi", NULL)) {
3402 qemu_opt_set(opts, "backend", "parport");
3403 qemu_opt_set(opts, "path", filename);
3404 return opts;
3405 }
3406 if (strstart(filename, "/dev/", NULL)) {
3407 qemu_opt_set(opts, "backend", "tty");
3408 qemu_opt_set(opts, "path", filename);
3409 return opts;
3410 }
3411
3412 fail:
3413 qemu_opts_del(opts);
3414 return NULL;
3415 }
3416
3417 static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3418 Error **errp)
3419 {
3420 const char *path = qemu_opt_get(opts, "path");
3421
3422 if (path == NULL) {
3423 error_setg(errp, "chardev: file: no filename given");
3424 return;
3425 }
3426 backend->file = g_new0(ChardevFile, 1);
3427 backend->file->out = g_strdup(path);
3428 }
3429
3430 static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3431 Error **errp)
3432 {
3433 backend->stdio = g_new0(ChardevStdio, 1);
3434 backend->stdio->has_sign