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virtio-balloon: Check if balloon registration failed
[qemu.git] / qemu-char.c
blob8e8cf31a29209914517bb078f8b0880b741eb0e1
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 "net.h"
26 #include "monitor.h"
27 #include "console.h"
28 #include "sysemu.h"
29 #include "qemu-timer.h"
30 #include "qemu-char.h"
31 #include "hw/usb.h"
32 #include "hw/baum.h"
33 #include "hw/msmouse.h"
34 #include "qemu-objects.h"
35
36 #include <unistd.h>
37 #include <fcntl.h>
38 #include <time.h>
39 #include <errno.h>
40 #include <sys/time.h>
41 #include <zlib.h>
42
43 #ifndef _WIN32
44 #include <sys/times.h>
45 #include <sys/wait.h>
46 #include <termios.h>
47 #include <sys/mman.h>
48 #include <sys/ioctl.h>
49 #include <sys/resource.h>
50 #include <sys/socket.h>
51 #include <netinet/in.h>
52 #include <net/if.h>
53 #include <arpa/inet.h>
54 #include <dirent.h>
55 #include <netdb.h>
56 #include <sys/select.h>
57 #ifdef CONFIG_BSD
58 #include <sys/stat.h>
59 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
60 #include <libutil.h>
61 #include <dev/ppbus/ppi.h>
62 #include <dev/ppbus/ppbconf.h>
63 #if defined(__GLIBC__)
64 #include <pty.h>
65 #endif
66 #elif defined(__DragonFly__)
67 #include <libutil.h>
68 #include <dev/misc/ppi/ppi.h>
69 #include <bus/ppbus/ppbconf.h>
70 #else
71 #include <util.h>
72 #endif
73 #else
74 #ifdef __linux__
75 #include <pty.h>
76
77 #include <linux/ppdev.h>
78 #include <linux/parport.h>
79 #endif
80 #ifdef __sun__
81 #include <sys/stat.h>
82 #include <sys/ethernet.h>
83 #include <sys/sockio.h>
84 #include <netinet/arp.h>
85 #include <netinet/in.h>
86 #include <netinet/in_systm.h>
87 #include <netinet/ip.h>
88 #include <netinet/ip_icmp.h> // must come after ip.h
89 #include <netinet/udp.h>
90 #include <netinet/tcp.h>
91 #include <net/if.h>
92 #include <syslog.h>
93 #include <stropts.h>
94 #endif
95 #endif
96 #endif
97
98 #include "qemu_socket.h"
99 #include "ui/qemu-spice.h"
100
101 #define READ_BUF_LEN 4096
102
103 /***********************************************************/
104 /* character device */
105
106 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
107 QTAILQ_HEAD_INITIALIZER(chardevs);
108
109 static void qemu_chr_event(CharDriverState *s, int event)
110 {
111 /* Keep track if the char device is open */
112 switch (event) {
113 case CHR_EVENT_OPENED:
114 s->opened = 1;
115 break;
116 case CHR_EVENT_CLOSED:
117 s->opened = 0;
118 break;
119 }
120
121 if (!s->chr_event)
122 return;
123 s->chr_event(s->handler_opaque, event);
124 }
125
126 static void qemu_chr_generic_open_bh(void *opaque)
127 {
128 CharDriverState *s = opaque;
129 qemu_chr_event(s, CHR_EVENT_OPENED);
130 qemu_bh_delete(s->bh);
131 s->bh = NULL;
132 }
133
134 void qemu_chr_generic_open(CharDriverState *s)
135 {
136 if (s->bh == NULL) {
137 s->bh = qemu_bh_new(qemu_chr_generic_open_bh, s);
138 qemu_bh_schedule(s->bh);
139 }
140 }
141
142 int qemu_chr_write(CharDriverState *s, const uint8_t *buf, int len)
143 {
144 return s->chr_write(s, buf, len);
145 }
146
147 int qemu_chr_ioctl(CharDriverState *s, int cmd, void *arg)
148 {
149 if (!s->chr_ioctl)
150 return -ENOTSUP;
151 return s->chr_ioctl(s, cmd, arg);
152 }
153
154 int qemu_chr_can_read(CharDriverState *s)
155 {
156 if (!s->chr_can_read)
157 return 0;
158 return s->chr_can_read(s->handler_opaque);
159 }
160
161 void qemu_chr_read(CharDriverState *s, uint8_t *buf, int len)
162 {
163 s->chr_read(s->handler_opaque, buf, len);
164 }
165
166 int qemu_chr_get_msgfd(CharDriverState *s)
167 {
168 return s->get_msgfd ? s->get_msgfd(s) : -1;
169 }
170
171 int qemu_chr_add_client(CharDriverState *s, int fd)
172 {
173 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
174 }
175
176 void qemu_chr_accept_input(CharDriverState *s)
177 {
178 if (s->chr_accept_input)
179 s->chr_accept_input(s);
180 }
181
182 void qemu_chr_printf(CharDriverState *s, const char *fmt, ...)
183 {
184 char buf[READ_BUF_LEN];
185 va_list ap;
186 va_start(ap, fmt);
187 vsnprintf(buf, sizeof(buf), fmt, ap);
188 qemu_chr_write(s, (uint8_t *)buf, strlen(buf));
189 va_end(ap);
190 }
191
192 void qemu_chr_send_event(CharDriverState *s, int event)
193 {
194 if (s->chr_send_event)
195 s->chr_send_event(s, event);
196 }
197
198 void qemu_chr_add_handlers(CharDriverState *s,
199 IOCanReadHandler *fd_can_read,
200 IOReadHandler *fd_read,
201 IOEventHandler *fd_event,
202 void *opaque)
203 {
204 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
205 /* chr driver being released. */
206 ++s->avail_connections;
207 }
208 s->chr_can_read = fd_can_read;
209 s->chr_read = fd_read;
210 s->chr_event = fd_event;
211 s->handler_opaque = opaque;
212 if (s->chr_update_read_handler)
213 s->chr_update_read_handler(s);
214
215 /* We're connecting to an already opened device, so let's make sure we
216 also get the open event */
217 if (s->opened) {
218 qemu_chr_generic_open(s);
219 }
220 }
221
222 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
223 {
224 return len;
225 }
226
227 static int qemu_chr_open_null(QemuOpts *opts, CharDriverState **_chr)
228 {
229 CharDriverState *chr;
230
231 chr = qemu_mallocz(sizeof(CharDriverState));
232 chr->chr_write = null_chr_write;
233
234 *_chr= chr;
235 return 0;
236 }
237
238 /* MUX driver for serial I/O splitting */
239 #define MAX_MUX 4
240 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
241 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
242 typedef struct {
243 IOCanReadHandler *chr_can_read[MAX_MUX];
244 IOReadHandler *chr_read[MAX_MUX];
245 IOEventHandler *chr_event[MAX_MUX];
246 void *ext_opaque[MAX_MUX];
247 CharDriverState *drv;
248 int focus;
249 int mux_cnt;
250 int term_got_escape;
251 int max_size;
252 /* Intermediate input buffer allows to catch escape sequences even if the
253 currently active device is not accepting any input - but only until it
254 is full as well. */
255 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
256 int prod[MAX_MUX];
257 int cons[MAX_MUX];
258 int timestamps;
259 int linestart;
260 int64_t timestamps_start;
261 } MuxDriver;
262
263
264 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
265 {
266 MuxDriver *d = chr->opaque;
267 int ret;
268 if (!d->timestamps) {
269 ret = d->drv->chr_write(d->drv, buf, len);
270 } else {
271 int i;
272
273 ret = 0;
274 for (i = 0; i < len; i++) {
275 if (d->linestart) {
276 char buf1[64];
277 int64_t ti;
278 int secs;
279
280 ti = qemu_get_clock_ms(rt_clock);
281 if (d->timestamps_start == -1)
282 d->timestamps_start = ti;
283 ti -= d->timestamps_start;
284 secs = ti / 1000;
285 snprintf(buf1, sizeof(buf1),
286 "[%02d:%02d:%02d.%03d] ",
287 secs / 3600,
288 (secs / 60) % 60,
289 secs % 60,
290 (int)(ti % 1000));
291 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
292 d->linestart = 0;
293 }
294 ret += d->drv->chr_write(d->drv, buf+i, 1);
295 if (buf[i] == '\n') {
296 d->linestart = 1;
297 }
298 }
299 }
300 return ret;
301 }
302
303 static const char * const mux_help[] = {
304 "% h print this help\n\r",
305 "% x exit emulator\n\r",
306 "% s save disk data back to file (if -snapshot)\n\r",
307 "% t toggle console timestamps\n\r"
308 "% b send break (magic sysrq)\n\r",
309 "% c switch between console and monitor\n\r",
310 "% % sends %\n\r",
311 NULL
312 };
313
314 int term_escape_char = 0x01; /* ctrl-a is used for escape */
315 static void mux_print_help(CharDriverState *chr)
316 {
317 int i, j;
318 char ebuf[15] = "Escape-Char";
319 char cbuf[50] = "\n\r";
320
321 if (term_escape_char > 0 && term_escape_char < 26) {
322 snprintf(cbuf, sizeof(cbuf), "\n\r");
323 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
324 } else {
325 snprintf(cbuf, sizeof(cbuf),
326 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
327 term_escape_char);
328 }
329 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
330 for (i = 0; mux_help[i] != NULL; i++) {
331 for (j=0; mux_help[i][j] != '\0'; j++) {
332 if (mux_help[i][j] == '%')
333 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
334 else
335 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
336 }
337 }
338 }
339
340 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
341 {
342 if (d->chr_event[mux_nr])
343 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
344 }
345
346 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
347 {
348 if (d->term_got_escape) {
349 d->term_got_escape = 0;
350 if (ch == term_escape_char)
351 goto send_char;
352 switch(ch) {
353 case '?':
354 case 'h':
355 mux_print_help(chr);
356 break;
357 case 'x':
358 {
359 const char *term = "QEMU: Terminated\n\r";
360 chr->chr_write(chr,(uint8_t *)term,strlen(term));
361 exit(0);
362 break;
363 }
364 case 's':
365 bdrv_commit_all();
366 break;
367 case 'b':
368 qemu_chr_event(chr, CHR_EVENT_BREAK);
369 break;
370 case 'c':
371 /* Switch to the next registered device */
372 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
373 d->focus++;
374 if (d->focus >= d->mux_cnt)
375 d->focus = 0;
376 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
377 break;
378 case 't':
379 d->timestamps = !d->timestamps;
380 d->timestamps_start = -1;
381 d->linestart = 0;
382 break;
383 }
384 } else if (ch == term_escape_char) {
385 d->term_got_escape = 1;
386 } else {
387 send_char:
388 return 1;
389 }
390 return 0;
391 }
392
393 static void mux_chr_accept_input(CharDriverState *chr)
394 {
395 MuxDriver *d = chr->opaque;
396 int m = d->focus;
397
398 while (d->prod[m] != d->cons[m] &&
399 d->chr_can_read[m] &&
400 d->chr_can_read[m](d->ext_opaque[m])) {
401 d->chr_read[m](d->ext_opaque[m],
402 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
403 }
404 }
405
406 static int mux_chr_can_read(void *opaque)
407 {
408 CharDriverState *chr = opaque;
409 MuxDriver *d = chr->opaque;
410 int m = d->focus;
411
412 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
413 return 1;
414 if (d->chr_can_read[m])
415 return d->chr_can_read[m](d->ext_opaque[m]);
416 return 0;
417 }
418
419 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
420 {
421 CharDriverState *chr = opaque;
422 MuxDriver *d = chr->opaque;
423 int m = d->focus;
424 int i;
425
426 mux_chr_accept_input (opaque);
427
428 for(i = 0; i < size; i++)
429 if (mux_proc_byte(chr, d, buf[i])) {
430 if (d->prod[m] == d->cons[m] &&
431 d->chr_can_read[m] &&
432 d->chr_can_read[m](d->ext_opaque[m]))
433 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
434 else
435 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
436 }
437 }
438
439 static void mux_chr_event(void *opaque, int event)
440 {
441 CharDriverState *chr = opaque;
442 MuxDriver *d = chr->opaque;
443 int i;
444
445 /* Send the event to all registered listeners */
446 for (i = 0; i < d->mux_cnt; i++)
447 mux_chr_send_event(d, i, event);
448 }
449
450 static void mux_chr_update_read_handler(CharDriverState *chr)
451 {
452 MuxDriver *d = chr->opaque;
453
454 if (d->mux_cnt >= MAX_MUX) {
455 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
456 return;
457 }
458 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
459 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
460 d->chr_read[d->mux_cnt] = chr->chr_read;
461 d->chr_event[d->mux_cnt] = chr->chr_event;
462 /* Fix up the real driver with mux routines */
463 if (d->mux_cnt == 0) {
464 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
465 mux_chr_event, chr);
466 }
467 if (d->focus != -1) {
468 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
469 }
470 d->focus = d->mux_cnt;
471 d->mux_cnt++;
472 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
473 }
474
475 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
476 {
477 CharDriverState *chr;
478 MuxDriver *d;
479
480 chr = qemu_mallocz(sizeof(CharDriverState));
481 d = qemu_mallocz(sizeof(MuxDriver));
482
483 chr->opaque = d;
484 d->drv = drv;
485 d->focus = -1;
486 chr->chr_write = mux_chr_write;
487 chr->chr_update_read_handler = mux_chr_update_read_handler;
488 chr->chr_accept_input = mux_chr_accept_input;
489 /* Frontend guest-open / -close notification is not support with muxes */
490 chr->chr_guest_open = NULL;
491 chr->chr_guest_close = NULL;
492
493 /* Muxes are always open on creation */
494 qemu_chr_generic_open(chr);
495
496 return chr;
497 }
498
499
500 #ifdef _WIN32
501 int send_all(int fd, const void *buf, int len1)
502 {
503 int ret, len;
504
505 len = len1;
506 while (len > 0) {
507 ret = send(fd, buf, len, 0);
508 if (ret < 0) {
509 errno = WSAGetLastError();
510 if (errno != WSAEWOULDBLOCK) {
511 return -1;
512 }
513 } else if (ret == 0) {
514 break;
515 } else {
516 buf += ret;
517 len -= ret;
518 }
519 }
520 return len1 - len;
521 }
522
523 #else
524
525 int send_all(int fd, const void *_buf, int len1)
526 {
527 int ret, len;
528 const uint8_t *buf = _buf;
529
530 len = len1;
531 while (len > 0) {
532 ret = write(fd, buf, len);
533 if (ret < 0) {
534 if (errno != EINTR && errno != EAGAIN)
535 return -1;
536 } else if (ret == 0) {
537 break;
538 } else {
539 buf += ret;
540 len -= ret;
541 }
542 }
543 return len1 - len;
544 }
545 #endif /* !_WIN32 */
546
547 #ifndef _WIN32
548
549 typedef struct {
550 int fd_in, fd_out;
551 int max_size;
552 } FDCharDriver;
553
554 #define STDIO_MAX_CLIENTS 1
555 static int stdio_nb_clients = 0;
556
557 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
558 {
559 FDCharDriver *s = chr->opaque;
560 return send_all(s->fd_out, buf, len);
561 }
562
563 static int fd_chr_read_poll(void *opaque)
564 {
565 CharDriverState *chr = opaque;
566 FDCharDriver *s = chr->opaque;
567
568 s->max_size = qemu_chr_can_read(chr);
569 return s->max_size;
570 }
571
572 static void fd_chr_read(void *opaque)
573 {
574 CharDriverState *chr = opaque;
575 FDCharDriver *s = chr->opaque;
576 int size, len;
577 uint8_t buf[READ_BUF_LEN];
578
579 len = sizeof(buf);
580 if (len > s->max_size)
581 len = s->max_size;
582 if (len == 0)
583 return;
584 size = read(s->fd_in, buf, len);
585 if (size == 0) {
586 /* FD has been closed. Remove it from the active list. */
587 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
588 qemu_chr_event(chr, CHR_EVENT_CLOSED);
589 return;
590 }
591 if (size > 0) {
592 qemu_chr_read(chr, buf, size);
593 }
594 }
595
596 static void fd_chr_update_read_handler(CharDriverState *chr)
597 {
598 FDCharDriver *s = chr->opaque;
599
600 if (s->fd_in >= 0) {
601 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
602 } else {
603 qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
604 fd_chr_read, NULL, chr);
605 }
606 }
607 }
608
609 static void fd_chr_close(struct CharDriverState *chr)
610 {
611 FDCharDriver *s = chr->opaque;
612
613 if (s->fd_in >= 0) {
614 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
615 } else {
616 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
617 }
618 }
619
620 qemu_free(s);
621 qemu_chr_event(chr, CHR_EVENT_CLOSED);
622 }
623
624 /* open a character device to a unix fd */
625 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
626 {
627 CharDriverState *chr;
628 FDCharDriver *s;
629
630 chr = qemu_mallocz(sizeof(CharDriverState));
631 s = qemu_mallocz(sizeof(FDCharDriver));
632 s->fd_in = fd_in;
633 s->fd_out = fd_out;
634 chr->opaque = s;
635 chr->chr_write = fd_chr_write;
636 chr->chr_update_read_handler = fd_chr_update_read_handler;
637 chr->chr_close = fd_chr_close;
638
639 qemu_chr_generic_open(chr);
640
641 return chr;
642 }
643
644 static int qemu_chr_open_file_out(QemuOpts *opts, CharDriverState **_chr)
645 {
646 int fd_out;
647
648 TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
649 O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
650 if (fd_out < 0) {
651 return -errno;
652 }
653
654 *_chr = qemu_chr_open_fd(-1, fd_out);
655 return 0;
656 }
657
658 static int qemu_chr_open_pipe(QemuOpts *opts, CharDriverState **_chr)
659 {
660 int fd_in, fd_out;
661 char filename_in[256], filename_out[256];
662 const char *filename = qemu_opt_get(opts, "path");
663
664 if (filename == NULL) {
665 fprintf(stderr, "chardev: pipe: no filename given\n");
666 return -EINVAL;
667 }
668
669 snprintf(filename_in, 256, "%s.in", filename);
670 snprintf(filename_out, 256, "%s.out", filename);
671 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
672 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
673 if (fd_in < 0 || fd_out < 0) {
674 if (fd_in >= 0)
675 close(fd_in);
676 if (fd_out >= 0)
677 close(fd_out);
678 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
679 if (fd_in < 0) {
680 return -errno;
681 }
682 }
683
684 *_chr = qemu_chr_open_fd(fd_in, fd_out);
685 return 0;
686 }
687
688
689 /* for STDIO, we handle the case where several clients use it
690 (nographic mode) */
691
692 #define TERM_FIFO_MAX_SIZE 1
693
694 static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
695 static int term_fifo_size;
696
697 static int stdio_read_poll(void *opaque)
698 {
699 CharDriverState *chr = opaque;
700
701 /* try to flush the queue if needed */
702 if (term_fifo_size != 0 && qemu_chr_can_read(chr) > 0) {
703 qemu_chr_read(chr, term_fifo, 1);
704 term_fifo_size = 0;
705 }
706 /* see if we can absorb more chars */
707 if (term_fifo_size == 0)
708 return 1;
709 else
710 return 0;
711 }
712
713 static void stdio_read(void *opaque)
714 {
715 int size;
716 uint8_t buf[1];
717 CharDriverState *chr = opaque;
718
719 size = read(0, buf, 1);
720 if (size == 0) {
721 /* stdin has been closed. Remove it from the active list. */
722 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
723 qemu_chr_event(chr, CHR_EVENT_CLOSED);
724 return;
725 }
726 if (size > 0) {
727 if (qemu_chr_can_read(chr) > 0) {
728 qemu_chr_read(chr, buf, 1);
729 } else if (term_fifo_size == 0) {
730 term_fifo[term_fifo_size++] = buf[0];
731 }
732 }
733 }
734
735 /* init terminal so that we can grab keys */
736 static struct termios oldtty;
737 static int old_fd0_flags;
738 static bool stdio_allow_signal;
739
740 static void term_exit(void)
741 {
742 tcsetattr (0, TCSANOW, &oldtty);
743 fcntl(0, F_SETFL, old_fd0_flags);
744 }
745
746 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
747 {
748 struct termios tty;
749
750 tty = oldtty;
751 if (!echo) {
752 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
753 |INLCR|IGNCR|ICRNL|IXON);
754 tty.c_oflag |= OPOST;
755 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
756 tty.c_cflag &= ~(CSIZE|PARENB);
757 tty.c_cflag |= CS8;
758 tty.c_cc[VMIN] = 1;
759 tty.c_cc[VTIME] = 0;
760 }
761 /* if graphical mode, we allow Ctrl-C handling */
762 if (!stdio_allow_signal)
763 tty.c_lflag &= ~ISIG;
764
765 tcsetattr (0, TCSANOW, &tty);
766 }
767
768 static void qemu_chr_close_stdio(struct CharDriverState *chr)
769 {
770 term_exit();
771 stdio_nb_clients--;
772 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
773 fd_chr_close(chr);
774 }
775
776 static int qemu_chr_open_stdio(QemuOpts *opts, CharDriverState **_chr)
777 {
778 CharDriverState *chr;
779
780 if (stdio_nb_clients >= STDIO_MAX_CLIENTS) {
781 return -EBUSY;
782 }
783
784 if (stdio_nb_clients == 0) {
785 old_fd0_flags = fcntl(0, F_GETFL);
786 tcgetattr (0, &oldtty);
787 fcntl(0, F_SETFL, O_NONBLOCK);
788 atexit(term_exit);
789 }
790
791 chr = qemu_chr_open_fd(0, 1);
792 chr->chr_close = qemu_chr_close_stdio;
793 chr->chr_set_echo = qemu_chr_set_echo_stdio;
794 qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
795 stdio_nb_clients++;
796 stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
797 display_type != DT_NOGRAPHIC);
798 qemu_chr_set_echo(chr, false);
799
800 *_chr = chr;
801 return 0;
802 }
803
804 #ifdef __sun__
805 /* Once Solaris has openpty(), this is going to be removed. */
806 static int openpty(int *amaster, int *aslave, char *name,
807 struct termios *termp, struct winsize *winp)
808 {
809 const char *slave;
810 int mfd = -1, sfd = -1;
811
812 *amaster = *aslave = -1;
813
814 mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
815 if (mfd < 0)
816 goto err;
817
818 if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
819 goto err;
820
821 if ((slave = ptsname(mfd)) == NULL)
822 goto err;
823
824 if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
825 goto err;
826
827 if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
828 (termp != NULL && tcgetattr(sfd, termp) < 0))
829 goto err;
830
831 if (amaster)
832 *amaster = mfd;
833 if (aslave)
834 *aslave = sfd;
835 if (winp)
836 ioctl(sfd, TIOCSWINSZ, winp);
837
838 return 0;
839
840 err:
841 if (sfd != -1)
842 close(sfd);
843 close(mfd);
844 return -1;
845 }
846
847 static void cfmakeraw (struct termios *termios_p)
848 {
849 termios_p->c_iflag &=
850 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
851 termios_p->c_oflag &= ~OPOST;
852 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
853 termios_p->c_cflag &= ~(CSIZE|PARENB);
854 termios_p->c_cflag |= CS8;
855
856 termios_p->c_cc[VMIN] = 0;
857 termios_p->c_cc[VTIME] = 0;
858 }
859 #endif
860
861 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
862 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
863 || defined(__GLIBC__)
864
865 typedef struct {
866 int fd;
867 int connected;
868 int polling;
869 int read_bytes;
870 QEMUTimer *timer;
871 } PtyCharDriver;
872
873 static void pty_chr_update_read_handler(CharDriverState *chr);
874 static void pty_chr_state(CharDriverState *chr, int connected);
875
876 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
877 {
878 PtyCharDriver *s = chr->opaque;
879
880 if (!s->connected) {
881 /* guest sends data, check for (re-)connect */
882 pty_chr_update_read_handler(chr);
883 return 0;
884 }
885 return send_all(s->fd, buf, len);
886 }
887
888 static int pty_chr_read_poll(void *opaque)
889 {
890 CharDriverState *chr = opaque;
891 PtyCharDriver *s = chr->opaque;
892
893 s->read_bytes = qemu_chr_can_read(chr);
894 return s->read_bytes;
895 }
896
897 static void pty_chr_read(void *opaque)
898 {
899 CharDriverState *chr = opaque;
900 PtyCharDriver *s = chr->opaque;
901 int size, len;
902 uint8_t buf[READ_BUF_LEN];
903
904 len = sizeof(buf);
905 if (len > s->read_bytes)
906 len = s->read_bytes;
907 if (len == 0)
908 return;
909 size = read(s->fd, buf, len);
910 if ((size == -1 && errno == EIO) ||
911 (size == 0)) {
912 pty_chr_state(chr, 0);
913 return;
914 }
915 if (size > 0) {
916 pty_chr_state(chr, 1);
917 qemu_chr_read(chr, buf, size);
918 }
919 }
920
921 static void pty_chr_update_read_handler(CharDriverState *chr)
922 {
923 PtyCharDriver *s = chr->opaque;
924
925 qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
926 pty_chr_read, NULL, chr);
927 s->polling = 1;
928 /*
929 * Short timeout here: just need wait long enougth that qemu makes
930 * it through the poll loop once. When reconnected we want a
931 * short timeout so we notice it almost instantly. Otherwise
932 * read() gives us -EIO instantly, making pty_chr_state() reset the
933 * timeout to the normal (much longer) poll interval before the
934 * timer triggers.
935 */
936 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 10);
937 }
938
939 static void pty_chr_state(CharDriverState *chr, int connected)
940 {
941 PtyCharDriver *s = chr->opaque;
942
943 if (!connected) {
944 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
945 s->connected = 0;
946 s->polling = 0;
947 /* (re-)connect poll interval for idle guests: once per second.
948 * We check more frequently in case the guests sends data to
949 * the virtual device linked to our pty. */
950 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 1000);
951 } else {
952 if (!s->connected)
953 qemu_chr_generic_open(chr);
954 s->connected = 1;
955 }
956 }
957
958 static void pty_chr_timer(void *opaque)
959 {
960 struct CharDriverState *chr = opaque;
961 PtyCharDriver *s = chr->opaque;
962
963 if (s->connected)
964 return;
965 if (s->polling) {
966 /* If we arrive here without polling being cleared due
967 * read returning -EIO, then we are (re-)connected */
968 pty_chr_state(chr, 1);
969 return;
970 }
971
972 /* Next poll ... */
973 pty_chr_update_read_handler(chr);
974 }
975
976 static void pty_chr_close(struct CharDriverState *chr)
977 {
978 PtyCharDriver *s = chr->opaque;
979
980 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
981 close(s->fd);
982 qemu_del_timer(s->timer);
983 qemu_free_timer(s->timer);
984 qemu_free(s);
985 qemu_chr_event(chr, CHR_EVENT_CLOSED);
986 }
987
988 static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr)
989 {
990 CharDriverState *chr;
991 PtyCharDriver *s;
992 struct termios tty;
993 int slave_fd, len;
994 #if defined(__OpenBSD__) || defined(__DragonFly__)
995 char pty_name[PATH_MAX];
996 #define q_ptsname(x) pty_name
997 #else
998 char *pty_name = NULL;
999 #define q_ptsname(x) ptsname(x)
1000 #endif
1001
1002 chr = qemu_mallocz(sizeof(CharDriverState));
1003 s = qemu_mallocz(sizeof(PtyCharDriver));
1004
1005 if (openpty(&s->fd, &slave_fd, pty_name, NULL, NULL) < 0) {
1006 return -errno;
1007 }
1008
1009 /* Set raw attributes on the pty. */
1010 tcgetattr(slave_fd, &tty);
1011 cfmakeraw(&tty);
1012 tcsetattr(slave_fd, TCSAFLUSH, &tty);
1013 close(slave_fd);
1014
1015 len = strlen(q_ptsname(s->fd)) + 5;
1016 chr->filename = qemu_malloc(len);
1017 snprintf(chr->filename, len, "pty:%s", q_ptsname(s->fd));
1018 qemu_opt_set(opts, "path", q_ptsname(s->fd));
1019 fprintf(stderr, "char device redirected to %s\n", q_ptsname(s->fd));
1020
1021 chr->opaque = s;
1022 chr->chr_write = pty_chr_write;
1023 chr->chr_update_read_handler = pty_chr_update_read_handler;
1024 chr->chr_close = pty_chr_close;
1025
1026 s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr);
1027
1028 *_chr = chr;
1029 return 0;
1030 }
1031
1032 static void tty_serial_init(int fd, int speed,
1033 int parity, int data_bits, int stop_bits)
1034 {
1035 struct termios tty;
1036 speed_t spd;
1037
1038 #if 0
1039 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1040 speed, parity, data_bits, stop_bits);
1041 #endif
1042 tcgetattr (fd, &tty);
1043
1044 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1045 speed = speed * 10 / 11;
1046 do {
1047 check_speed(50);
1048 check_speed(75);
1049 check_speed(110);
1050 check_speed(134);
1051 check_speed(150);
1052 check_speed(200);
1053 check_speed(300);
1054 check_speed(600);
1055 check_speed(1200);
1056 check_speed(1800);
1057 check_speed(2400);
1058 check_speed(4800);
1059 check_speed(9600);
1060 check_speed(19200);
1061 check_speed(38400);
1062 /* Non-Posix values follow. They may be unsupported on some systems. */
1063 check_speed(57600);
1064 check_speed(115200);
1065 #ifdef B230400
1066 check_speed(230400);
1067 #endif
1068 #ifdef B460800
1069 check_speed(460800);
1070 #endif
1071 #ifdef B500000
1072 check_speed(500000);
1073 #endif
1074 #ifdef B576000
1075 check_speed(576000);
1076 #endif
1077 #ifdef B921600
1078 check_speed(921600);
1079 #endif
1080 #ifdef B1000000
1081 check_speed(1000000);
1082 #endif
1083 #ifdef B1152000
1084 check_speed(1152000);
1085 #endif
1086 #ifdef B1500000
1087 check_speed(1500000);
1088 #endif
1089 #ifdef B2000000
1090 check_speed(2000000);
1091 #endif
1092 #ifdef B2500000
1093 check_speed(2500000);
1094 #endif
1095 #ifdef B3000000
1096 check_speed(3000000);
1097 #endif
1098 #ifdef B3500000
1099 check_speed(3500000);
1100 #endif
1101 #ifdef B4000000
1102 check_speed(4000000);
1103 #endif
1104 spd = B115200;
1105 } while (0);
1106
1107 cfsetispeed(&tty, spd);
1108 cfsetospeed(&tty, spd);
1109
1110 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1111 |INLCR|IGNCR|ICRNL|IXON);
1112 tty.c_oflag |= OPOST;
1113 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1114 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1115 switch(data_bits) {
1116 default:
1117 case 8:
1118 tty.c_cflag |= CS8;
1119 break;
1120 case 7:
1121 tty.c_cflag |= CS7;
1122 break;
1123 case 6:
1124 tty.c_cflag |= CS6;
1125 break;
1126 case 5:
1127 tty.c_cflag |= CS5;
1128 break;
1129 }
1130 switch(parity) {
1131 default:
1132 case 'N':
1133 break;
1134 case 'E':
1135 tty.c_cflag |= PARENB;
1136 break;
1137 case 'O':
1138 tty.c_cflag |= PARENB | PARODD;
1139 break;
1140 }
1141 if (stop_bits == 2)
1142 tty.c_cflag |= CSTOPB;
1143
1144 tcsetattr (fd, TCSANOW, &tty);
1145 }
1146
1147 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1148 {
1149 FDCharDriver *s = chr->opaque;
1150
1151 switch(cmd) {
1152 case CHR_IOCTL_SERIAL_SET_PARAMS:
1153 {
1154 QEMUSerialSetParams *ssp = arg;
1155 tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1156 ssp->data_bits, ssp->stop_bits);
1157 }
1158 break;
1159 case CHR_IOCTL_SERIAL_SET_BREAK:
1160 {
1161 int enable = *(int *)arg;
1162 if (enable)
1163 tcsendbreak(s->fd_in, 1);
1164 }
1165 break;
1166 case CHR_IOCTL_SERIAL_GET_TIOCM:
1167 {
1168 int sarg = 0;
1169 int *targ = (int *)arg;
1170 ioctl(s->fd_in, TIOCMGET, &sarg);
1171 *targ = 0;
1172 if (sarg & TIOCM_CTS)
1173 *targ |= CHR_TIOCM_CTS;
1174 if (sarg & TIOCM_CAR)
1175 *targ |= CHR_TIOCM_CAR;
1176 if (sarg & TIOCM_DSR)
1177 *targ |= CHR_TIOCM_DSR;
1178 if (sarg & TIOCM_RI)
1179 *targ |= CHR_TIOCM_RI;
1180 if (sarg & TIOCM_DTR)
1181 *targ |= CHR_TIOCM_DTR;
1182 if (sarg & TIOCM_RTS)
1183 *targ |= CHR_TIOCM_RTS;
1184 }
1185 break;
1186 case CHR_IOCTL_SERIAL_SET_TIOCM:
1187 {
1188 int sarg = *(int *)arg;
1189 int targ = 0;
1190 ioctl(s->fd_in, TIOCMGET, &targ);
1191 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1192 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1193 if (sarg & CHR_TIOCM_CTS)
1194 targ |= TIOCM_CTS;
1195 if (sarg & CHR_TIOCM_CAR)
1196 targ |= TIOCM_CAR;
1197 if (sarg & CHR_TIOCM_DSR)
1198 targ |= TIOCM_DSR;
1199 if (sarg & CHR_TIOCM_RI)
1200 targ |= TIOCM_RI;
1201 if (sarg & CHR_TIOCM_DTR)
1202 targ |= TIOCM_DTR;
1203 if (sarg & CHR_TIOCM_RTS)
1204 targ |= TIOCM_RTS;
1205 ioctl(s->fd_in, TIOCMSET, &targ);
1206 }
1207 break;
1208 default:
1209 return -ENOTSUP;
1210 }
1211 return 0;
1212 }
1213
1214 static void qemu_chr_close_tty(CharDriverState *chr)
1215 {
1216 FDCharDriver *s = chr->opaque;
1217 int fd = -1;
1218
1219 if (s) {
1220 fd = s->fd_in;
1221 }
1222
1223 fd_chr_close(chr);
1224
1225 if (fd >= 0) {
1226 close(fd);
1227 }
1228 }
1229
1230 static int qemu_chr_open_tty(QemuOpts *opts, CharDriverState **_chr)
1231 {
1232 const char *filename = qemu_opt_get(opts, "path");
1233 CharDriverState *chr;
1234 int fd;
1235
1236 TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK));
1237 if (fd < 0) {
1238 return -errno;
1239 }
1240 tty_serial_init(fd, 115200, 'N', 8, 1);
1241 chr = qemu_chr_open_fd(fd, fd);
1242 chr->chr_ioctl = tty_serial_ioctl;
1243 chr->chr_close = qemu_chr_close_tty;
1244
1245 *_chr = chr;
1246 return 0;
1247 }
1248 #else /* ! __linux__ && ! __sun__ */
1249 static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr)
1250 {
1251 return -ENOTSUP;
1252 }
1253 #endif /* __linux__ || __sun__ */
1254
1255 #if defined(__linux__)
1256 typedef struct {
1257 int fd;
1258 int mode;
1259 } ParallelCharDriver;
1260
1261 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1262 {
1263 if (s->mode != mode) {
1264 int m = mode;
1265 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1266 return 0;
1267 s->mode = mode;
1268 }
1269 return 1;
1270 }
1271
1272 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1273 {
1274 ParallelCharDriver *drv = chr->opaque;
1275 int fd = drv->fd;
1276 uint8_t b;
1277
1278 switch(cmd) {
1279 case CHR_IOCTL_PP_READ_DATA:
1280 if (ioctl(fd, PPRDATA, &b) < 0)
1281 return -ENOTSUP;
1282 *(uint8_t *)arg = b;
1283 break;
1284 case CHR_IOCTL_PP_WRITE_DATA:
1285 b = *(uint8_t *)arg;
1286 if (ioctl(fd, PPWDATA, &b) < 0)
1287 return -ENOTSUP;
1288 break;
1289 case CHR_IOCTL_PP_READ_CONTROL:
1290 if (ioctl(fd, PPRCONTROL, &b) < 0)
1291 return -ENOTSUP;
1292 /* Linux gives only the lowest bits, and no way to know data
1293 direction! For better compatibility set the fixed upper
1294 bits. */
1295 *(uint8_t *)arg = b | 0xc0;
1296 break;
1297 case CHR_IOCTL_PP_WRITE_CONTROL:
1298 b = *(uint8_t *)arg;
1299 if (ioctl(fd, PPWCONTROL, &b) < 0)
1300 return -ENOTSUP;
1301 break;
1302 case CHR_IOCTL_PP_READ_STATUS:
1303 if (ioctl(fd, PPRSTATUS, &b) < 0)
1304 return -ENOTSUP;
1305 *(uint8_t *)arg = b;
1306 break;
1307 case CHR_IOCTL_PP_DATA_DIR:
1308 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1309 return -ENOTSUP;
1310 break;
1311 case CHR_IOCTL_PP_EPP_READ_ADDR:
1312 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1313 struct ParallelIOArg *parg = arg;
1314 int n = read(fd, parg->buffer, parg->count);
1315 if (n != parg->count) {
1316 return -EIO;
1317 }
1318 }
1319 break;
1320 case CHR_IOCTL_PP_EPP_READ:
1321 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1322 struct ParallelIOArg *parg = arg;
1323 int n = read(fd, parg->buffer, parg->count);
1324 if (n != parg->count) {
1325 return -EIO;
1326 }
1327 }
1328 break;
1329 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1330 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1331 struct ParallelIOArg *parg = arg;
1332 int n = write(fd, parg->buffer, parg->count);
1333 if (n != parg->count) {
1334 return -EIO;
1335 }
1336 }
1337 break;
1338 case CHR_IOCTL_PP_EPP_WRITE:
1339 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1340 struct ParallelIOArg *parg = arg;
1341 int n = write(fd, parg->buffer, parg->count);
1342 if (n != parg->count) {
1343 return -EIO;
1344 }
1345 }
1346 break;
1347 default:
1348 return -ENOTSUP;
1349 }
1350 return 0;
1351 }
1352
1353 static void pp_close(CharDriverState *chr)
1354 {
1355 ParallelCharDriver *drv = chr->opaque;
1356 int fd = drv->fd;
1357
1358 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1359 ioctl(fd, PPRELEASE);
1360 close(fd);
1361 qemu_free(drv);
1362 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1363 }
1364
1365 static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr)
1366 {
1367 const char *filename = qemu_opt_get(opts, "path");
1368 CharDriverState *chr;
1369 ParallelCharDriver *drv;
1370 int fd;
1371
1372 TFR(fd = open(filename, O_RDWR));
1373 if (fd < 0) {
1374 return -errno;
1375 }
1376
1377 if (ioctl(fd, PPCLAIM) < 0) {
1378 close(fd);
1379 return -errno;
1380 }
1381
1382 drv = qemu_mallocz(sizeof(ParallelCharDriver));
1383 drv->fd = fd;
1384 drv->mode = IEEE1284_MODE_COMPAT;
1385
1386 chr = qemu_mallocz(sizeof(CharDriverState));
1387 chr->chr_write = null_chr_write;
1388 chr->chr_ioctl = pp_ioctl;
1389 chr->chr_close = pp_close;
1390 chr->opaque = drv;
1391
1392 qemu_chr_generic_open(chr);
1393
1394 *_chr = chr;
1395 return 0;
1396 }
1397 #endif /* __linux__ */
1398
1399 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1400 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1401 {
1402 int fd = (int)(intptr_t)chr->opaque;
1403 uint8_t b;
1404
1405 switch(cmd) {
1406 case CHR_IOCTL_PP_READ_DATA:
1407 if (ioctl(fd, PPIGDATA, &b) < 0)
1408 return -ENOTSUP;
1409 *(uint8_t *)arg = b;
1410 break;
1411 case CHR_IOCTL_PP_WRITE_DATA:
1412 b = *(uint8_t *)arg;
1413 if (ioctl(fd, PPISDATA, &b) < 0)
1414 return -ENOTSUP;
1415 break;
1416 case CHR_IOCTL_PP_READ_CONTROL:
1417 if (ioctl(fd, PPIGCTRL, &b) < 0)
1418 return -ENOTSUP;
1419 *(uint8_t *)arg = b;
1420 break;
1421 case CHR_IOCTL_PP_WRITE_CONTROL:
1422 b = *(uint8_t *)arg;
1423 if (ioctl(fd, PPISCTRL, &b) < 0)
1424 return -ENOTSUP;
1425 break;
1426 case CHR_IOCTL_PP_READ_STATUS:
1427 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1428 return -ENOTSUP;
1429 *(uint8_t *)arg = b;
1430 break;
1431 default:
1432 return -ENOTSUP;
1433 }
1434 return 0;
1435 }
1436
1437 static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr)
1438 {
1439 const char *filename = qemu_opt_get(opts, "path");
1440 CharDriverState *chr;
1441 int fd;
1442
1443 fd = qemu_open(filename, O_RDWR);
1444 if (fd < 0) {
1445 return -errno;
1446 }
1447
1448 chr = qemu_mallocz(sizeof(CharDriverState));
1449 chr->opaque = (void *)(intptr_t)fd;
1450 chr->chr_write = null_chr_write;
1451 chr->chr_ioctl = pp_ioctl;
1452
1453 *_chr = chr;
1454 return 0;
1455 }
1456 #endif
1457
1458 #else /* _WIN32 */
1459
1460 typedef struct {
1461 int max_size;
1462 HANDLE hcom, hrecv, hsend;
1463 OVERLAPPED orecv, osend;
1464 BOOL fpipe;
1465 DWORD len;
1466 } WinCharState;
1467
1468 #define NSENDBUF 2048
1469 #define NRECVBUF 2048
1470 #define MAXCONNECT 1
1471 #define NTIMEOUT 5000
1472
1473 static int win_chr_poll(void *opaque);
1474 static int win_chr_pipe_poll(void *opaque);
1475
1476 static void win_chr_close(CharDriverState *chr)
1477 {
1478 WinCharState *s = chr->opaque;
1479
1480 if (s->hsend) {
1481 CloseHandle(s->hsend);
1482 s->hsend = NULL;
1483 }
1484 if (s->hrecv) {
1485 CloseHandle(s->hrecv);
1486 s->hrecv = NULL;
1487 }
1488 if (s->hcom) {
1489 CloseHandle(s->hcom);
1490 s->hcom = NULL;
1491 }
1492 if (s->fpipe)
1493 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1494 else
1495 qemu_del_polling_cb(win_chr_poll, chr);
1496
1497 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1498 }
1499
1500 static int win_chr_init(CharDriverState *chr, const char *filename)
1501 {
1502 WinCharState *s = chr->opaque;
1503 COMMCONFIG comcfg;
1504 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1505 COMSTAT comstat;
1506 DWORD size;
1507 DWORD err;
1508
1509 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1510 if (!s->hsend) {
1511 fprintf(stderr, "Failed CreateEvent\n");
1512 goto fail;
1513 }
1514 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1515 if (!s->hrecv) {
1516 fprintf(stderr, "Failed CreateEvent\n");
1517 goto fail;
1518 }
1519
1520 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1521 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1522 if (s->hcom == INVALID_HANDLE_VALUE) {
1523 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1524 s->hcom = NULL;
1525 goto fail;
1526 }
1527
1528 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1529 fprintf(stderr, "Failed SetupComm\n");
1530 goto fail;
1531 }
1532
1533 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1534 size = sizeof(COMMCONFIG);
1535 GetDefaultCommConfig(filename, &comcfg, &size);
1536 comcfg.dcb.DCBlength = sizeof(DCB);
1537 CommConfigDialog(filename, NULL, &comcfg);
1538
1539 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1540 fprintf(stderr, "Failed SetCommState\n");
1541 goto fail;
1542 }
1543
1544 if (!SetCommMask(s->hcom, EV_ERR)) {
1545 fprintf(stderr, "Failed SetCommMask\n");
1546 goto fail;
1547 }
1548
1549 cto.ReadIntervalTimeout = MAXDWORD;
1550 if (!SetCommTimeouts(s->hcom, &cto)) {
1551 fprintf(stderr, "Failed SetCommTimeouts\n");
1552 goto fail;
1553 }
1554
1555 if (!ClearCommError(s->hcom, &err, &comstat)) {
1556 fprintf(stderr, "Failed ClearCommError\n");
1557 goto fail;
1558 }
1559 qemu_add_polling_cb(win_chr_poll, chr);
1560 return 0;
1561
1562 fail:
1563 win_chr_close(chr);
1564 return -1;
1565 }
1566
1567 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1568 {
1569 WinCharState *s = chr->opaque;
1570 DWORD len, ret, size, err;
1571
1572 len = len1;
1573 ZeroMemory(&s->osend, sizeof(s->osend));
1574 s->osend.hEvent = s->hsend;
1575 while (len > 0) {
1576 if (s->hsend)
1577 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1578 else
1579 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1580 if (!ret) {
1581 err = GetLastError();
1582 if (err == ERROR_IO_PENDING) {
1583 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1584 if (ret) {
1585 buf += size;
1586 len -= size;
1587 } else {
1588 break;
1589 }
1590 } else {
1591 break;
1592 }
1593 } else {
1594 buf += size;
1595 len -= size;
1596 }
1597 }
1598 return len1 - len;
1599 }
1600
1601 static int win_chr_read_poll(CharDriverState *chr)
1602 {
1603 WinCharState *s = chr->opaque;
1604
1605 s->max_size = qemu_chr_can_read(chr);
1606 return s->max_size;
1607 }
1608
1609 static void win_chr_readfile(CharDriverState *chr)
1610 {
1611 WinCharState *s = chr->opaque;
1612 int ret, err;
1613 uint8_t buf[READ_BUF_LEN];
1614 DWORD size;
1615
1616 ZeroMemory(&s->orecv, sizeof(s->orecv));
1617 s->orecv.hEvent = s->hrecv;
1618 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1619 if (!ret) {
1620 err = GetLastError();
1621 if (err == ERROR_IO_PENDING) {
1622 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1623 }
1624 }
1625
1626 if (size > 0) {
1627 qemu_chr_read(chr, buf, size);
1628 }
1629 }
1630
1631 static void win_chr_read(CharDriverState *chr)
1632 {
1633 WinCharState *s = chr->opaque;
1634
1635 if (s->len > s->max_size)
1636 s->len = s->max_size;
1637 if (s->len == 0)
1638 return;
1639
1640 win_chr_readfile(chr);
1641 }
1642
1643 static int win_chr_poll(void *opaque)
1644 {
1645 CharDriverState *chr = opaque;
1646 WinCharState *s = chr->opaque;
1647 COMSTAT status;
1648 DWORD comerr;
1649
1650 ClearCommError(s->hcom, &comerr, &status);
1651 if (status.cbInQue > 0) {
1652 s->len = status.cbInQue;
1653 win_chr_read_poll(chr);
1654 win_chr_read(chr);
1655 return 1;
1656 }
1657 return 0;
1658 }
1659
1660 static int qemu_chr_open_win(QemuOpts *opts, CharDriverState **_chr)
1661 {
1662 const char *filename = qemu_opt_get(opts, "path");
1663 CharDriverState *chr;
1664 WinCharState *s;
1665
1666 chr = qemu_mallocz(sizeof(CharDriverState));
1667 s = qemu_mallocz(sizeof(WinCharState));
1668 chr->opaque = s;
1669 chr->chr_write = win_chr_write;
1670 chr->chr_close = win_chr_close;
1671
1672 if (win_chr_init(chr, filename) < 0) {
1673 free(s);
1674 free(chr);
1675 return -EIO;
1676 }
1677 qemu_chr_generic_open(chr);
1678
1679 *_chr = chr;
1680 return 0;
1681 }
1682
1683 static int win_chr_pipe_poll(void *opaque)
1684 {
1685 CharDriverState *chr = opaque;
1686 WinCharState *s = chr->opaque;
1687 DWORD size;
1688
1689 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1690 if (size > 0) {
1691 s->len = size;
1692 win_chr_read_poll(chr);
1693 win_chr_read(chr);
1694 return 1;
1695 }
1696 return 0;
1697 }
1698
1699 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1700 {
1701 WinCharState *s = chr->opaque;
1702 OVERLAPPED ov;
1703 int ret;
1704 DWORD size;
1705 char openname[256];
1706
1707 s->fpipe = TRUE;
1708
1709 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1710 if (!s->hsend) {
1711 fprintf(stderr, "Failed CreateEvent\n");
1712 goto fail;
1713 }
1714 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1715 if (!s->hrecv) {
1716 fprintf(stderr, "Failed CreateEvent\n");
1717 goto fail;
1718 }
1719
1720 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1721 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1722 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1723 PIPE_WAIT,
1724 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1725 if (s->hcom == INVALID_HANDLE_VALUE) {
1726 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1727 s->hcom = NULL;
1728 goto fail;
1729 }
1730
1731 ZeroMemory(&ov, sizeof(ov));
1732 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1733 ret = ConnectNamedPipe(s->hcom, &ov);
1734 if (ret) {
1735 fprintf(stderr, "Failed ConnectNamedPipe\n");
1736 goto fail;
1737 }
1738
1739 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1740 if (!ret) {
1741 fprintf(stderr, "Failed GetOverlappedResult\n");
1742 if (ov.hEvent) {
1743 CloseHandle(ov.hEvent);
1744 ov.hEvent = NULL;
1745 }
1746 goto fail;
1747 }
1748
1749 if (ov.hEvent) {
1750 CloseHandle(ov.hEvent);
1751 ov.hEvent = NULL;
1752 }
1753 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1754 return 0;
1755
1756 fail:
1757 win_chr_close(chr);
1758 return -1;
1759 }
1760
1761
1762 static int qemu_chr_open_win_pipe(QemuOpts *opts, CharDriverState **_chr)
1763 {
1764 const char *filename = qemu_opt_get(opts, "path");
1765 CharDriverState *chr;
1766 WinCharState *s;
1767
1768 chr = qemu_mallocz(sizeof(CharDriverState));
1769 s = qemu_mallocz(sizeof(WinCharState));
1770 chr->opaque = s;
1771 chr->chr_write = win_chr_write;
1772 chr->chr_close = win_chr_close;
1773
1774 if (win_chr_pipe_init(chr, filename) < 0) {
1775 free(s);
1776 free(chr);
1777 return -EIO;
1778 }
1779 qemu_chr_generic_open(chr);
1780
1781 *_chr = chr;
1782 return 0;
1783 }
1784
1785 static int qemu_chr_open_win_file(HANDLE fd_out, CharDriverState **pchr)
1786 {
1787 CharDriverState *chr;
1788 WinCharState *s;
1789
1790 chr = qemu_mallocz(sizeof(CharDriverState));
1791 s = qemu_mallocz(sizeof(WinCharState));
1792 s->hcom = fd_out;
1793 chr->opaque = s;
1794 chr->chr_write = win_chr_write;
1795 qemu_chr_generic_open(chr);
1796 *pchr = chr;
1797 return 0;
1798 }
1799
1800 static int qemu_chr_open_win_con(QemuOpts *opts, CharDriverState **chr)
1801 {
1802 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE), chr);
1803 }
1804
1805 static int qemu_chr_open_win_file_out(QemuOpts *opts, CharDriverState **_chr)
1806 {
1807 const char *file_out = qemu_opt_get(opts, "path");
1808 HANDLE fd_out;
1809
1810 fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1811 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1812 if (fd_out == INVALID_HANDLE_VALUE) {
1813 return -EIO;
1814 }
1815
1816 return qemu_chr_open_win_file(fd_out, _chr);
1817 }
1818 #endif /* !_WIN32 */
1819
1820 /***********************************************************/
1821 /* UDP Net console */
1822
1823 typedef struct {
1824 int fd;
1825 uint8_t buf[READ_BUF_LEN];
1826 int bufcnt;
1827 int bufptr;
1828 int max_size;
1829 } NetCharDriver;
1830
1831 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1832 {
1833 NetCharDriver *s = chr->opaque;
1834
1835 return send(s->fd, (const void *)buf, len, 0);
1836 }
1837
1838 static int udp_chr_read_poll(void *opaque)
1839 {
1840 CharDriverState *chr = opaque;
1841 NetCharDriver *s = chr->opaque;
1842
1843 s->max_size = qemu_chr_can_read(chr);
1844
1845 /* If there were any stray characters in the queue process them
1846 * first
1847 */
1848 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1849 qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1850 s->bufptr++;
1851 s->max_size = qemu_chr_can_read(chr);
1852 }
1853 return s->max_size;
1854 }
1855
1856 static void udp_chr_read(void *opaque)
1857 {
1858 CharDriverState *chr = opaque;
1859 NetCharDriver *s = chr->opaque;
1860
1861 if (s->max_size == 0)
1862 return;
1863 s->bufcnt = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0);
1864 s->bufptr = s->bufcnt;
1865 if (s->bufcnt <= 0)
1866 return;
1867
1868 s->bufptr = 0;
1869 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1870 qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1871 s->bufptr++;
1872 s->max_size = qemu_chr_can_read(chr);
1873 }
1874 }
1875
1876 static void udp_chr_update_read_handler(CharDriverState *chr)
1877 {
1878 NetCharDriver *s = chr->opaque;
1879
1880 if (s->fd >= 0) {
1881 qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
1882 udp_chr_read, NULL, chr);
1883 }
1884 }
1885
1886 static void udp_chr_close(CharDriverState *chr)
1887 {
1888 NetCharDriver *s = chr->opaque;
1889 if (s->fd >= 0) {
1890 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1891 closesocket(s->fd);
1892 }
1893 qemu_free(s);
1894 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1895 }
1896
1897 static int qemu_chr_open_udp(QemuOpts *opts, CharDriverState **_chr)
1898 {
1899 CharDriverState *chr = NULL;
1900 NetCharDriver *s = NULL;
1901 int fd = -1;
1902 int ret;
1903
1904 chr = qemu_mallocz(sizeof(CharDriverState));
1905 s = qemu_mallocz(sizeof(NetCharDriver));
1906
1907 fd = inet_dgram_opts(opts);
1908 if (fd < 0) {
1909 fprintf(stderr, "inet_dgram_opts failed\n");
1910 ret = -errno;
1911 goto return_err;
1912 }
1913
1914 s->fd = fd;
1915 s->bufcnt = 0;
1916 s->bufptr = 0;
1917 chr->opaque = s;
1918 chr->chr_write = udp_chr_write;
1919 chr->chr_update_read_handler = udp_chr_update_read_handler;
1920 chr->chr_close = udp_chr_close;
1921
1922 *_chr = chr;
1923 return 0;
1924
1925 return_err:
1926 qemu_free(chr);
1927 qemu_free(s);
1928 if (fd >= 0) {
1929 closesocket(fd);
1930 }
1931 return ret;
1932 }
1933
1934 /***********************************************************/
1935 /* TCP Net console */
1936
1937 typedef struct {
1938 int fd, listen_fd;
1939 int connected;
1940 int max_size;
1941 int do_telnetopt;
1942 int do_nodelay;
1943 int is_unix;
1944 int msgfd;
1945 } TCPCharDriver;
1946
1947 static void tcp_chr_accept(void *opaque);
1948
1949 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1950 {
1951 TCPCharDriver *s = chr->opaque;
1952 if (s->connected) {
1953 return send_all(s->fd, buf, len);
1954 } else {
1955 /* XXX: indicate an error ? */
1956 return len;
1957 }
1958 }
1959
1960 static int tcp_chr_read_poll(void *opaque)
1961 {
1962 CharDriverState *chr = opaque;
1963 TCPCharDriver *s = chr->opaque;
1964 if (!s->connected)
1965 return 0;
1966 s->max_size = qemu_chr_can_read(chr);
1967 return s->max_size;
1968 }
1969
1970 #define IAC 255
1971 #define IAC_BREAK 243
1972 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
1973 TCPCharDriver *s,
1974 uint8_t *buf, int *size)
1975 {
1976 /* Handle any telnet client's basic IAC options to satisfy char by
1977 * char mode with no echo. All IAC options will be removed from
1978 * the buf and the do_telnetopt variable will be used to track the
1979 * state of the width of the IAC information.
1980 *
1981 * IAC commands come in sets of 3 bytes with the exception of the
1982 * "IAC BREAK" command and the double IAC.
1983 */
1984
1985 int i;
1986 int j = 0;
1987
1988 for (i = 0; i < *size; i++) {
1989 if (s->do_telnetopt > 1) {
1990 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
1991 /* Double IAC means send an IAC */
1992 if (j != i)
1993 buf[j] = buf[i];
1994 j++;
1995 s->do_telnetopt = 1;
1996 } else {
1997 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
1998 /* Handle IAC break commands by sending a serial break */
1999 qemu_chr_event(chr, CHR_EVENT_BREAK);
2000 s->do_telnetopt++;
2001 }
2002 s->do_telnetopt++;
2003 }
2004 if (s->do_telnetopt >= 4) {
2005 s->do_telnetopt = 1;
2006 }
2007 } else {
2008 if ((unsigned char)buf[i] == IAC) {
2009 s->do_telnetopt = 2;
2010 } else {
2011 if (j != i)
2012 buf[j] = buf[i];
2013 j++;
2014 }
2015 }
2016 }
2017 *size = j;
2018 }
2019
2020 static int tcp_get_msgfd(CharDriverState *chr)
2021 {
2022 TCPCharDriver *s = chr->opaque;
2023 int fd = s->msgfd;
2024 s->msgfd = -1;
2025 return fd;
2026 }
2027
2028 #ifndef _WIN32
2029 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2030 {
2031 TCPCharDriver *s = chr->opaque;
2032 struct cmsghdr *cmsg;
2033
2034 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2035 int fd;
2036
2037 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2038 cmsg->cmsg_level != SOL_SOCKET ||
2039 cmsg->cmsg_type != SCM_RIGHTS)
2040 continue;
2041
2042 fd = *((int *)CMSG_DATA(cmsg));
2043 if (fd < 0)
2044 continue;
2045
2046 if (s->msgfd != -1)
2047 close(s->msgfd);
2048 s->msgfd = fd;
2049 }
2050 }
2051
2052 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2053 {
2054 TCPCharDriver *s = chr->opaque;
2055 struct msghdr msg = { NULL, };
2056 struct iovec iov[1];
2057 union {
2058 struct cmsghdr cmsg;
2059 char control[CMSG_SPACE(sizeof(int))];
2060 } msg_control;
2061 ssize_t ret;
2062
2063 iov[0].iov_base = buf;
2064 iov[0].iov_len = len;
2065
2066 msg.msg_iov = iov;
2067 msg.msg_iovlen = 1;
2068 msg.msg_control = &msg_control;
2069 msg.msg_controllen = sizeof(msg_control);
2070
2071 ret = recvmsg(s->fd, &msg, 0);
2072 if (ret > 0 && s->is_unix)
2073 unix_process_msgfd(chr, &msg);
2074
2075 return ret;
2076 }
2077 #else
2078 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2079 {
2080 TCPCharDriver *s = chr->opaque;
2081 return qemu_recv(s->fd, buf, len, 0);
2082 }
2083 #endif
2084
2085 static void tcp_chr_read(void *opaque)
2086 {
2087 CharDriverState *chr = opaque;
2088 TCPCharDriver *s = chr->opaque;
2089 uint8_t buf[READ_BUF_LEN];
2090 int len, size;
2091
2092 if (!s->connected || s->max_size <= 0)
2093 return;
2094 len = sizeof(buf);
2095 if (len > s->max_size)
2096 len = s->max_size;
2097 size = tcp_chr_recv(chr, (void *)buf, len);
2098 if (size == 0) {
2099 /* connection closed */
2100 s->connected = 0;
2101 if (s->listen_fd >= 0) {
2102 qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2103 }
2104 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2105 closesocket(s->fd);
2106 s->fd = -1;
2107 qemu_chr_event(chr, CHR_EVENT_CLOSED);
2108 } else if (size > 0) {
2109 if (s->do_telnetopt)
2110 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2111 if (size > 0)
2112 qemu_chr_read(chr, buf, size);
2113 }
2114 }
2115
2116 #ifndef _WIN32
2117 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2118 {
2119 return qemu_chr_open_fd(eventfd, eventfd);
2120 }
2121 #endif
2122
2123 static void tcp_chr_connect(void *opaque)
2124 {
2125 CharDriverState *chr = opaque;
2126 TCPCharDriver *s = chr->opaque;
2127
2128 s->connected = 1;
2129 qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2130 tcp_chr_read, NULL, chr);
2131 qemu_chr_generic_open(chr);
2132 }
2133
2134 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2135 static void tcp_chr_telnet_init(int fd)
2136 {
2137 char buf[3];
2138 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2139 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2140 send(fd, (char *)buf, 3, 0);
2141 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2142 send(fd, (char *)buf, 3, 0);
2143 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2144 send(fd, (char *)buf, 3, 0);
2145 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2146 send(fd, (char *)buf, 3, 0);
2147 }
2148
2149 static void socket_set_nodelay(int fd)
2150 {
2151 int val = 1;
2152 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2153 }
2154
2155 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2156 {
2157 TCPCharDriver *s = chr->opaque;
2158 if (s->fd != -1)
2159 return -1;
2160
2161 socket_set_nonblock(fd);
2162 if (s->do_nodelay)
2163 socket_set_nodelay(fd);
2164 s->fd = fd;
2165 qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2166 tcp_chr_connect(chr);
2167
2168 return 0;
2169 }
2170
2171 static void tcp_chr_accept(void *opaque)
2172 {
2173 CharDriverState *chr = opaque;
2174 TCPCharDriver *s = chr->opaque;
2175 struct sockaddr_in saddr;
2176 #ifndef _WIN32
2177 struct sockaddr_un uaddr;
2178 #endif
2179 struct sockaddr *addr;
2180 socklen_t len;
2181 int fd;
2182
2183 for(;;) {
2184 #ifndef _WIN32
2185 if (s->is_unix) {
2186 len = sizeof(uaddr);
2187 addr = (struct sockaddr *)&uaddr;
2188 } else
2189 #endif
2190 {
2191 len = sizeof(saddr);
2192 addr = (struct sockaddr *)&saddr;
2193 }
2194 fd = qemu_accept(s->listen_fd, addr, &len);
2195 if (fd < 0 && errno != EINTR) {
2196 return;
2197 } else if (fd >= 0) {
2198 if (s->do_telnetopt)
2199 tcp_chr_telnet_init(fd);
2200 break;
2201 }
2202 }
2203 if (tcp_chr_add_client(chr, fd) < 0)
2204 close(fd);
2205 }
2206
2207 static void tcp_chr_close(CharDriverState *chr)
2208 {
2209 TCPCharDriver *s = chr->opaque;
2210 if (s->fd >= 0) {
2211 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2212 closesocket(s->fd);
2213 }
2214 if (s->listen_fd >= 0) {
2215 qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2216 closesocket(s->listen_fd);
2217 }
2218 qemu_free(s);
2219 qemu_chr_event(chr, CHR_EVENT_CLOSED);
2220 }
2221
2222 static int qemu_chr_open_socket(QemuOpts *opts, CharDriverState **_chr)
2223 {
2224 CharDriverState *chr = NULL;
2225 TCPCharDriver *s = NULL;
2226 int fd = -1;
2227 int is_listen;
2228 int is_waitconnect;
2229 int do_nodelay;
2230 int is_unix;
2231 int is_telnet;
2232 int ret;
2233
2234 is_listen = qemu_opt_get_bool(opts, "server", 0);
2235 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2236 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2237 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2238 is_unix = qemu_opt_get(opts, "path") != NULL;
2239 if (!is_listen)
2240 is_waitconnect = 0;
2241
2242 chr = qemu_mallocz(sizeof(CharDriverState));
2243 s = qemu_mallocz(sizeof(TCPCharDriver));
2244
2245 if (is_unix) {
2246 if (is_listen) {
2247 fd = unix_listen_opts(opts);
2248 } else {
2249 fd = unix_connect_opts(opts);
2250 }
2251 } else {
2252 if (is_listen) {
2253 fd = inet_listen_opts(opts, 0);
2254 } else {
2255 fd = inet_connect_opts(opts);
2256 }
2257 }
2258 if (fd < 0) {
2259 ret = -errno;
2260 goto fail;
2261 }
2262
2263 if (!is_waitconnect)
2264 socket_set_nonblock(fd);
2265
2266 s->connected = 0;
2267 s->fd = -1;
2268 s->listen_fd = -1;
2269 s->msgfd = -1;
2270 s->is_unix = is_unix;
2271 s->do_nodelay = do_nodelay && !is_unix;
2272
2273 chr->opaque = s;
2274 chr->chr_write = tcp_chr_write;
2275 chr->chr_close = tcp_chr_close;
2276 chr->get_msgfd = tcp_get_msgfd;
2277 chr->chr_add_client = tcp_chr_add_client;
2278
2279 if (is_listen) {
2280 s->listen_fd = fd;
2281 qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2282 if (is_telnet)
2283 s->do_telnetopt = 1;
2284
2285 } else {
2286 s->connected = 1;
2287 s->fd = fd;
2288 socket_set_nodelay(fd);
2289 tcp_chr_connect(chr);
2290 }
2291
2292 /* for "info chardev" monitor command */
2293 chr->filename = qemu_malloc(256);
2294 if (is_unix) {
2295 snprintf(chr->filename, 256, "unix:%s%s",
2296 qemu_opt_get(opts, "path"),
2297 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2298 } else if (is_telnet) {
2299 snprintf(chr->filename, 256, "telnet:%s:%s%s",
2300 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2301 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2302 } else {
2303 snprintf(chr->filename, 256, "tcp:%s:%s%s",
2304 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2305 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2306 }
2307
2308 if (is_listen && is_waitconnect) {
2309 printf("QEMU waiting for connection on: %s\n",
2310 chr->filename);
2311 tcp_chr_accept(chr);
2312 socket_set_nonblock(s->listen_fd);
2313 }
2314
2315 *_chr = chr;
2316 return 0;
2317
2318 fail:
2319 if (fd >= 0)
2320 closesocket(fd);
2321 qemu_free(s);
2322 qemu_free(chr);
2323 return ret;
2324 }
2325
2326 /***********************************************************/
2327 /* Memory chardev */
2328 typedef struct {
2329 size_t outbuf_size;
2330 size_t outbuf_capacity;
2331 uint8_t *outbuf;
2332 } MemoryDriver;
2333
2334 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2335 {
2336 MemoryDriver *d = chr->opaque;
2337
2338 /* TODO: the QString implementation has the same code, we should
2339 * introduce a generic way to do this in cutils.c */
2340 if (d->outbuf_capacity < d->outbuf_size + len) {
2341 /* grow outbuf */
2342 d->outbuf_capacity += len;
2343 d->outbuf_capacity *= 2;
2344 d->outbuf = qemu_realloc(d->outbuf, d->outbuf_capacity);
2345 }
2346
2347 memcpy(d->outbuf + d->outbuf_size, buf, len);
2348 d->outbuf_size += len;
2349
2350 return len;
2351 }
2352
2353 void qemu_chr_init_mem(CharDriverState *chr)
2354 {
2355 MemoryDriver *d;
2356
2357 d = qemu_malloc(sizeof(*d));
2358 d->outbuf_size = 0;
2359 d->outbuf_capacity = 4096;
2360 d->outbuf = qemu_mallocz(d->outbuf_capacity);
2361
2362 memset(chr, 0, sizeof(*chr));
2363 chr->opaque = d;
2364 chr->chr_write = mem_chr_write;
2365 }
2366
2367 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2368 {
2369 MemoryDriver *d = chr->opaque;
2370 return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2371 }
2372
2373 /* NOTE: this driver can not be closed with qemu_chr_close()! */
2374 void qemu_chr_close_mem(CharDriverState *chr)
2375 {
2376 MemoryDriver *d = chr->opaque;
2377
2378 qemu_free(d->outbuf);
2379 qemu_free(chr->opaque);
2380 chr->opaque = NULL;
2381 chr->chr_write = NULL;
2382 }
2383
2384 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2385 {
2386 const MemoryDriver *d = chr->opaque;
2387 return d->outbuf_size;
2388 }
2389
2390 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2391 {
2392 char host[65], port[33], width[8], height[8];
2393 int pos;
2394 const char *p;
2395 QemuOpts *opts;
2396
2397 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
2398 if (NULL == opts)
2399 return NULL;
2400
2401 if (strstart(filename, "mon:", &p)) {
2402 filename = p;
2403 qemu_opt_set(opts, "mux", "on");
2404 }
2405
2406 if (strcmp(filename, "null") == 0 ||
2407 strcmp(filename, "pty") == 0 ||
2408 strcmp(filename, "msmouse") == 0 ||
2409 strcmp(filename, "braille") == 0 ||
2410 strcmp(filename, "stdio") == 0) {
2411 qemu_opt_set(opts, "backend", filename);
2412 return opts;
2413 }
2414 if (strstart(filename, "vc", &p)) {
2415 qemu_opt_set(opts, "backend", "vc");
2416 if (*p == ':') {
2417 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2418 /* pixels */
2419 qemu_opt_set(opts, "width", width);
2420 qemu_opt_set(opts, "height", height);
2421 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2422 /* chars */
2423 qemu_opt_set(opts, "cols", width);
2424 qemu_opt_set(opts, "rows", height);
2425 } else {
2426 goto fail;
2427 }
2428 }
2429 return opts;
2430 }
2431 if (strcmp(filename, "con:") == 0) {
2432 qemu_opt_set(opts, "backend", "console");
2433 return opts;
2434 }
2435 if (strstart(filename, "COM", NULL)) {
2436 qemu_opt_set(opts, "backend", "serial");
2437 qemu_opt_set(opts, "path", filename);
2438 return opts;
2439 }
2440 if (strstart(filename, "file:", &p)) {
2441 qemu_opt_set(opts, "backend", "file");
2442 qemu_opt_set(opts, "path", p);
2443 return opts;
2444 }
2445 if (strstart(filename, "pipe:", &p)) {
2446 qemu_opt_set(opts, "backend", "pipe");
2447 qemu_opt_set(opts, "path", p);
2448 return opts;
2449 }
2450 if (strstart(filename, "tcp:", &p) ||
2451 strstart(filename, "telnet:", &p)) {
2452 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2453 host[0] = 0;
2454 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2455 goto fail;
2456 }
2457 qemu_opt_set(opts, "backend", "socket");
2458 qemu_opt_set(opts, "host", host);
2459 qemu_opt_set(opts, "port", port);
2460 if (p[pos] == ',') {
2461 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2462 goto fail;
2463 }
2464 if (strstart(filename, "telnet:", &p))
2465 qemu_opt_set(opts, "telnet", "on");
2466 return opts;
2467 }
2468 if (strstart(filename, "udp:", &p)) {
2469 qemu_opt_set(opts, "backend", "udp");
2470 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2471 host[0] = 0;
2472 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2473 goto fail;
2474 }
2475 }
2476 qemu_opt_set(opts, "host", host);
2477 qemu_opt_set(opts, "port", port);
2478 if (p[pos] == '@') {
2479 p += pos + 1;
2480 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2481 host[0] = 0;
2482 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2483 goto fail;
2484 }
2485 }
2486 qemu_opt_set(opts, "localaddr", host);
2487 qemu_opt_set(opts, "localport", port);
2488 }
2489 return opts;
2490 }
2491 if (strstart(filename, "unix:", &p)) {
2492 qemu_opt_set(opts, "backend", "socket");
2493 if (qemu_opts_do_parse(opts, p, "path") != 0)
2494 goto fail;
2495 return opts;
2496 }
2497 if (strstart(filename, "/dev/parport", NULL) ||
2498 strstart(filename, "/dev/ppi", NULL)) {
2499 qemu_opt_set(opts, "backend", "parport");
2500 qemu_opt_set(opts, "path", filename);
2501 return opts;
2502 }
2503 if (strstart(filename, "/dev/", NULL)) {
2504 qemu_opt_set(opts, "backend", "tty");
2505 qemu_opt_set(opts, "path", filename);
2506 return opts;
2507 }
2508
2509 fail:
2510 qemu_opts_del(opts);
2511 return NULL;
2512 }
2513
2514 static const struct {
2515 const char *name;
2516 int (*open)(QemuOpts *opts, CharDriverState **chr);
2517 } backend_table[] = {
2518 { .name = "null", .open = qemu_chr_open_null },
2519 { .name = "socket", .open = qemu_chr_open_socket },
2520 { .name = "udp", .open = qemu_chr_open_udp },
2521 { .name = "msmouse", .open = qemu_chr_open_msmouse },
2522 { .name = "vc", .open = text_console_init },
2523 #ifdef _WIN32
2524 { .name = "file", .open = qemu_chr_open_win_file_out },
2525 { .name = "pipe", .open = qemu_chr_open_win_pipe },
2526 { .name = "console", .open = qemu_chr_open_win_con },
2527 { .name = "serial", .open = qemu_chr_open_win },
2528 #else
2529 { .name = "file", .open = qemu_chr_open_file_out },
2530 { .name = "pipe", .open = qemu_chr_open_pipe },
2531 { .name = "pty", .open = qemu_chr_open_pty },
2532 { .name = "stdio", .open = qemu_chr_open_stdio },
2533 #endif
2534 #ifdef CONFIG_BRLAPI
2535 { .name = "braille", .open = chr_baum_init },
2536 #endif
2537 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2538 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
2539 || defined(__FreeBSD_kernel__)
2540 { .name = "tty", .open = qemu_chr_open_tty },
2541 #endif
2542 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
2543 || defined(__FreeBSD_kernel__)
2544 { .name = "parport", .open = qemu_chr_open_pp },
2545 #endif
2546 #ifdef CONFIG_SPICE
2547 { .name = "spicevmc", .open = qemu_chr_open_spice },
2548 #endif
2549 };
2550
2551 CharDriverState *qemu_chr_open_opts(QemuOpts *opts,
2552 void (*init)(struct CharDriverState *s))
2553 {
2554 CharDriverState *chr;
2555 int i;
2556 int ret;
2557
2558 if (qemu_opts_id(opts) == NULL) {
2559 fprintf(stderr, "chardev: no id specified\n");
2560 return NULL;
2561 }
2562
2563 if (qemu_opt_get(opts, "backend") == NULL) {
2564 fprintf(stderr, "chardev: \"%s\" missing backend\n",
2565 qemu_opts_id(opts));
2566 return NULL;
2567 }
2568 for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2569 if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2570 break;
2571 }
2572 if (i == ARRAY_SIZE(backend_table)) {
2573 fprintf(stderr, "chardev: backend \"%s\" not found\n",
2574 qemu_opt_get(opts, "backend"));
2575 return NULL;
2576 }
2577
2578 ret = backend_table[i].open(opts, &chr);
2579 if (ret < 0) {
2580 fprintf(stderr, "chardev: opening backend \"%s\" failed: %s\n",
2581 qemu_opt_get(opts, "backend"), strerror(-ret));
2582 return NULL;
2583 }
2584
2585 if (!chr->filename)
2586 chr->filename = qemu_strdup(qemu_opt_get(opts, "backend"));
2587 chr->init = init;
2588 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2589
2590 if (qemu_opt_get_bool(opts, "mux", 0)) {
2591 CharDriverState *base = chr;
2592 int len = strlen(qemu_opts_id(opts)) + 6;
2593 base->label = qemu_malloc(len);
2594 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
2595 chr = qemu_chr_open_mux(base);
2596 chr->filename = base->filename;
2597 chr->avail_connections = MAX_MUX;
2598 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2599 } else {
2600 chr->avail_connections = 1;
2601 }
2602 chr->label = qemu_strdup(qemu_opts_id(opts));
2603 return chr;
2604 }
2605
2606 CharDriverState *qemu_chr_open(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2607 {
2608 const char *p;
2609 CharDriverState *chr;
2610 QemuOpts *opts;
2611
2612 if (strstart(filename, "chardev:", &p)) {
2613 return qemu_chr_find(p);
2614 }
2615
2616 opts = qemu_chr_parse_compat(label, filename);
2617 if (!opts)
2618 return NULL;
2619
2620 chr = qemu_chr_open_opts(opts, init);
2621 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
2622 monitor_init(chr, MONITOR_USE_READLINE);
2623 }
2624 qemu_opts_del(opts);
2625 return chr;
2626 }
2627
2628 void qemu_chr_set_echo(struct CharDriverState *chr, bool echo)
2629 {
2630 if (chr->chr_set_echo) {
2631 chr->chr_set_echo(chr, echo);
2632 }
2633 }
2634
2635 void qemu_chr_guest_open(struct CharDriverState *chr)
2636 {
2637 if (chr->chr_guest_open) {
2638 chr->chr_guest_open(chr);
2639 }
2640 }
2641
2642 void qemu_chr_guest_close(struct CharDriverState *chr)
2643 {
2644 if (chr->chr_guest_close) {
2645 chr->chr_guest_close(chr);
2646 }
2647 }
2648
2649 void qemu_chr_close(CharDriverState *chr)
2650 {
2651 QTAILQ_REMOVE(&chardevs, chr, next);
2652 if (chr->chr_close)
2653 chr->chr_close(chr);
2654 qemu_free(chr->filename);
2655 qemu_free(chr->label);
2656 qemu_free(chr);
2657 }
2658
2659 static void qemu_chr_qlist_iter(QObject *obj, void *opaque)
2660 {
2661 QDict *chr_dict;
2662 Monitor *mon = opaque;
2663
2664 chr_dict = qobject_to_qdict(obj);
2665 monitor_printf(mon, "%s: filename=%s\n", qdict_get_str(chr_dict, "label"),
2666 qdict_get_str(chr_dict, "filename"));
2667 }
2668
2669 void qemu_chr_info_print(Monitor *mon, const QObject *ret_data)
2670 {
2671 qlist_iter(qobject_to_qlist(ret_data), qemu_chr_qlist_iter, mon);
2672 }
2673
2674 void qemu_chr_info(Monitor *mon, QObject **ret_data)
2675 {
2676 QList *chr_list;
2677 CharDriverState *chr;
2678
2679 chr_list = qlist_new();
2680
2681 QTAILQ_FOREACH(chr, &chardevs, next) {
2682 QObject *obj = qobject_from_jsonf("{ 'label': %s, 'filename': %s }",
2683 chr->label, chr->filename);
2684 qlist_append_obj(chr_list, obj);
2685 }
2686
2687 *ret_data = QOBJECT(chr_list);
2688 }
2689
2690 CharDriverState *qemu_chr_find(const char *name)
2691 {
2692 CharDriverState *chr;
2693
2694 QTAILQ_FOREACH(chr, &chardevs, next) {
2695 if (strcmp(chr->label, name) != 0)
2696 continue;
2697 return chr;
2698 }
2699 return NULL;
2700 }
QEmu