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block/raw-posix: use a character device if a block device is given
[qemu-dev-zwu.git] / qemu-char.c
blob5e04a20b8c4dd04ff14be2679439f51d237873d9
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 <signal.h>
39 #include <time.h>
40 #include <errno.h>
41 #include <sys/time.h>
42 #include <zlib.h>
43
44 #ifndef _WIN32
45 #include <sys/times.h>
46 #include <sys/wait.h>
47 #include <termios.h>
48 #include <sys/mman.h>
49 #include <sys/ioctl.h>
50 #include <sys/resource.h>
51 #include <sys/socket.h>
52 #include <netinet/in.h>
53 #include <net/if.h>
54 #include <arpa/inet.h>
55 #include <dirent.h>
56 #include <netdb.h>
57 #include <sys/select.h>
58 #ifdef CONFIG_BSD
59 #include <sys/stat.h>
60 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
61 #include <libutil.h>
62 #include <dev/ppbus/ppi.h>
63 #include <dev/ppbus/ppbconf.h>
64 #if defined(__GLIBC__)
65 #include <pty.h>
66 #endif
67 #elif defined(__DragonFly__)
68 #include <libutil.h>
69 #include <dev/misc/ppi/ppi.h>
70 #include <bus/ppbus/ppbconf.h>
71 #else
72 #include <util.h>
73 #endif
74 #else
75 #ifdef __linux__
76 #include <pty.h>
77
78 #include <linux/ppdev.h>
79 #include <linux/parport.h>
80 #endif
81 #ifdef __sun__
82 #include <sys/stat.h>
83 #include <sys/ethernet.h>
84 #include <sys/sockio.h>
85 #include <netinet/arp.h>
86 #include <netinet/in.h>
87 #include <netinet/in_systm.h>
88 #include <netinet/ip.h>
89 #include <netinet/ip_icmp.h> // must come after ip.h
90 #include <netinet/udp.h>
91 #include <netinet/tcp.h>
92 #include <net/if.h>
93 #include <syslog.h>
94 #include <stropts.h>
95 #endif
96 #endif
97 #endif
98
99 #include "qemu_socket.h"
100 #include "ui/qemu-spice.h"
101
102 #define READ_BUF_LEN 4096
103
104 /***********************************************************/
105 /* character device */
106
107 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
108 QTAILQ_HEAD_INITIALIZER(chardevs);
109
110 static void qemu_chr_event(CharDriverState *s, int event)
111 {
112 /* Keep track if the char device is open */
113 switch (event) {
114 case CHR_EVENT_OPENED:
115 s->opened = 1;
116 break;
117 case CHR_EVENT_CLOSED:
118 s->opened = 0;
119 break;
120 }
121
122 if (!s->chr_event)
123 return;
124 s->chr_event(s->handler_opaque, event);
125 }
126
127 static void qemu_chr_generic_open_bh(void *opaque)
128 {
129 CharDriverState *s = opaque;
130 qemu_chr_event(s, CHR_EVENT_OPENED);
131 qemu_bh_delete(s->bh);
132 s->bh = NULL;
133 }
134
135 void qemu_chr_generic_open(CharDriverState *s)
136 {
137 if (s->bh == NULL) {
138 s->bh = qemu_bh_new(qemu_chr_generic_open_bh, s);
139 qemu_bh_schedule(s->bh);
140 }
141 }
142
143 int qemu_chr_write(CharDriverState *s, const uint8_t *buf, int len)
144 {
145 return s->chr_write(s, buf, len);
146 }
147
148 int qemu_chr_ioctl(CharDriverState *s, int cmd, void *arg)
149 {
150 if (!s->chr_ioctl)
151 return -ENOTSUP;
152 return s->chr_ioctl(s, cmd, arg);
153 }
154
155 int qemu_chr_can_read(CharDriverState *s)
156 {
157 if (!s->chr_can_read)
158 return 0;
159 return s->chr_can_read(s->handler_opaque);
160 }
161
162 void qemu_chr_read(CharDriverState *s, uint8_t *buf, int len)
163 {
164 s->chr_read(s->handler_opaque, buf, len);
165 }
166
167 int qemu_chr_get_msgfd(CharDriverState *s)
168 {
169 return s->get_msgfd ? s->get_msgfd(s) : -1;
170 }
171
172 void qemu_chr_accept_input(CharDriverState *s)
173 {
174 if (s->chr_accept_input)
175 s->chr_accept_input(s);
176 }
177
178 void qemu_chr_printf(CharDriverState *s, const char *fmt, ...)
179 {
180 char buf[READ_BUF_LEN];
181 va_list ap;
182 va_start(ap, fmt);
183 vsnprintf(buf, sizeof(buf), fmt, ap);
184 qemu_chr_write(s, (uint8_t *)buf, strlen(buf));
185 va_end(ap);
186 }
187
188 void qemu_chr_send_event(CharDriverState *s, int event)
189 {
190 if (s->chr_send_event)
191 s->chr_send_event(s, event);
192 }
193
194 void qemu_chr_add_handlers(CharDriverState *s,
195 IOCanReadHandler *fd_can_read,
196 IOReadHandler *fd_read,
197 IOEventHandler *fd_event,
198 void *opaque)
199 {
200 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
201 /* chr driver being released. */
202 ++s->avail_connections;
203 }
204 s->chr_can_read = fd_can_read;
205 s->chr_read = fd_read;
206 s->chr_event = fd_event;
207 s->handler_opaque = opaque;
208 if (s->chr_update_read_handler)
209 s->chr_update_read_handler(s);
210
211 /* We're connecting to an already opened device, so let's make sure we
212 also get the open event */
213 if (s->opened) {
214 qemu_chr_generic_open(s);
215 }
216 }
217
218 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
219 {
220 return len;
221 }
222
223 static CharDriverState *qemu_chr_open_null(QemuOpts *opts)
224 {
225 CharDriverState *chr;
226
227 chr = qemu_mallocz(sizeof(CharDriverState));
228 chr->chr_write = null_chr_write;
229 return chr;
230 }
231
232 /* MUX driver for serial I/O splitting */
233 #define MAX_MUX 4
234 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
235 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
236 typedef struct {
237 IOCanReadHandler *chr_can_read[MAX_MUX];
238 IOReadHandler *chr_read[MAX_MUX];
239 IOEventHandler *chr_event[MAX_MUX];
240 void *ext_opaque[MAX_MUX];
241 CharDriverState *drv;
242 int focus;
243 int mux_cnt;
244 int term_got_escape;
245 int max_size;
246 /* Intermediate input buffer allows to catch escape sequences even if the
247 currently active device is not accepting any input - but only until it
248 is full as well. */
249 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
250 int prod[MAX_MUX];
251 int cons[MAX_MUX];
252 int timestamps;
253 int linestart;
254 int64_t timestamps_start;
255 } MuxDriver;
256
257
258 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
259 {
260 MuxDriver *d = chr->opaque;
261 int ret;
262 if (!d->timestamps) {
263 ret = d->drv->chr_write(d->drv, buf, len);
264 } else {
265 int i;
266
267 ret = 0;
268 for (i = 0; i < len; i++) {
269 if (d->linestart) {
270 char buf1[64];
271 int64_t ti;
272 int secs;
273
274 ti = qemu_get_clock_ms(rt_clock);
275 if (d->timestamps_start == -1)
276 d->timestamps_start = ti;
277 ti -= d->timestamps_start;
278 secs = ti / 1000;
279 snprintf(buf1, sizeof(buf1),
280 "[%02d:%02d:%02d.%03d] ",
281 secs / 3600,
282 (secs / 60) % 60,
283 secs % 60,
284 (int)(ti % 1000));
285 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
286 d->linestart = 0;
287 }
288 ret += d->drv->chr_write(d->drv, buf+i, 1);
289 if (buf[i] == '\n') {
290 d->linestart = 1;
291 }
292 }
293 }
294 return ret;
295 }
296
297 static const char * const mux_help[] = {
298 "% h print this help\n\r",
299 "% x exit emulator\n\r",
300 "% s save disk data back to file (if -snapshot)\n\r",
301 "% t toggle console timestamps\n\r"
302 "% b send break (magic sysrq)\n\r",
303 "% c switch between console and monitor\n\r",
304 "% % sends %\n\r",
305 NULL
306 };
307
308 int term_escape_char = 0x01; /* ctrl-a is used for escape */
309 static void mux_print_help(CharDriverState *chr)
310 {
311 int i, j;
312 char ebuf[15] = "Escape-Char";
313 char cbuf[50] = "\n\r";
314
315 if (term_escape_char > 0 && term_escape_char < 26) {
316 snprintf(cbuf, sizeof(cbuf), "\n\r");
317 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
318 } else {
319 snprintf(cbuf, sizeof(cbuf),
320 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
321 term_escape_char);
322 }
323 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
324 for (i = 0; mux_help[i] != NULL; i++) {
325 for (j=0; mux_help[i][j] != '\0'; j++) {
326 if (mux_help[i][j] == '%')
327 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
328 else
329 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
330 }
331 }
332 }
333
334 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
335 {
336 if (d->chr_event[mux_nr])
337 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
338 }
339
340 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
341 {
342 if (d->term_got_escape) {
343 d->term_got_escape = 0;
344 if (ch == term_escape_char)
345 goto send_char;
346 switch(ch) {
347 case '?':
348 case 'h':
349 mux_print_help(chr);
350 break;
351 case 'x':
352 {
353 const char *term = "QEMU: Terminated\n\r";
354 chr->chr_write(chr,(uint8_t *)term,strlen(term));
355 exit(0);
356 break;
357 }
358 case 's':
359 bdrv_commit_all();
360 break;
361 case 'b':
362 qemu_chr_event(chr, CHR_EVENT_BREAK);
363 break;
364 case 'c':
365 /* Switch to the next registered device */
366 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
367 d->focus++;
368 if (d->focus >= d->mux_cnt)
369 d->focus = 0;
370 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
371 break;
372 case 't':
373 d->timestamps = !d->timestamps;
374 d->timestamps_start = -1;
375 d->linestart = 0;
376 break;
377 }
378 } else if (ch == term_escape_char) {
379 d->term_got_escape = 1;
380 } else {
381 send_char:
382 return 1;
383 }
384 return 0;
385 }
386
387 static void mux_chr_accept_input(CharDriverState *chr)
388 {
389 MuxDriver *d = chr->opaque;
390 int m = d->focus;
391
392 while (d->prod[m] != d->cons[m] &&
393 d->chr_can_read[m] &&
394 d->chr_can_read[m](d->ext_opaque[m])) {
395 d->chr_read[m](d->ext_opaque[m],
396 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
397 }
398 }
399
400 static int mux_chr_can_read(void *opaque)
401 {
402 CharDriverState *chr = opaque;
403 MuxDriver *d = chr->opaque;
404 int m = d->focus;
405
406 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
407 return 1;
408 if (d->chr_can_read[m])
409 return d->chr_can_read[m](d->ext_opaque[m]);
410 return 0;
411 }
412
413 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
414 {
415 CharDriverState *chr = opaque;
416 MuxDriver *d = chr->opaque;
417 int m = d->focus;
418 int i;
419
420 mux_chr_accept_input (opaque);
421
422 for(i = 0; i < size; i++)
423 if (mux_proc_byte(chr, d, buf[i])) {
424 if (d->prod[m] == d->cons[m] &&
425 d->chr_can_read[m] &&
426 d->chr_can_read[m](d->ext_opaque[m]))
427 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
428 else
429 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
430 }
431 }
432
433 static void mux_chr_event(void *opaque, int event)
434 {
435 CharDriverState *chr = opaque;
436 MuxDriver *d = chr->opaque;
437 int i;
438
439 /* Send the event to all registered listeners */
440 for (i = 0; i < d->mux_cnt; i++)
441 mux_chr_send_event(d, i, event);
442 }
443
444 static void mux_chr_update_read_handler(CharDriverState *chr)
445 {
446 MuxDriver *d = chr->opaque;
447
448 if (d->mux_cnt >= MAX_MUX) {
449 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
450 return;
451 }
452 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
453 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
454 d->chr_read[d->mux_cnt] = chr->chr_read;
455 d->chr_event[d->mux_cnt] = chr->chr_event;
456 /* Fix up the real driver with mux routines */
457 if (d->mux_cnt == 0) {
458 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
459 mux_chr_event, chr);
460 }
461 if (d->focus != -1) {
462 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
463 }
464 d->focus = d->mux_cnt;
465 d->mux_cnt++;
466 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
467 }
468
469 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
470 {
471 CharDriverState *chr;
472 MuxDriver *d;
473
474 chr = qemu_mallocz(sizeof(CharDriverState));
475 d = qemu_mallocz(sizeof(MuxDriver));
476
477 chr->opaque = d;
478 d->drv = drv;
479 d->focus = -1;
480 chr->chr_write = mux_chr_write;
481 chr->chr_update_read_handler = mux_chr_update_read_handler;
482 chr->chr_accept_input = mux_chr_accept_input;
483 /* Frontend guest-open / -close notification is not support with muxes */
484 chr->chr_guest_open = NULL;
485 chr->chr_guest_close = NULL;
486
487 /* Muxes are always open on creation */
488 qemu_chr_generic_open(chr);
489
490 return chr;
491 }
492
493
494 #ifdef _WIN32
495 int send_all(int fd, const void *buf, int len1)
496 {
497 int ret, len;
498
499 len = len1;
500 while (len > 0) {
501 ret = send(fd, buf, len, 0);
502 if (ret < 0) {
503 errno = WSAGetLastError();
504 if (errno != WSAEWOULDBLOCK) {
505 return -1;
506 }
507 } else if (ret == 0) {
508 break;
509 } else {
510 buf += ret;
511 len -= ret;
512 }
513 }
514 return len1 - len;
515 }
516
517 #else
518
519 int send_all(int fd, const void *_buf, int len1)
520 {
521 int ret, len;
522 const uint8_t *buf = _buf;
523
524 len = len1;
525 while (len > 0) {
526 ret = write(fd, buf, len);
527 if (ret < 0) {
528 if (errno != EINTR && errno != EAGAIN)
529 return -1;
530 } else if (ret == 0) {
531 break;
532 } else {
533 buf += ret;
534 len -= ret;
535 }
536 }
537 return len1 - len;
538 }
539 #endif /* !_WIN32 */
540
541 #ifndef _WIN32
542
543 typedef struct {
544 int fd_in, fd_out;
545 int max_size;
546 } FDCharDriver;
547
548 #define STDIO_MAX_CLIENTS 1
549 static int stdio_nb_clients = 0;
550
551 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
552 {
553 FDCharDriver *s = chr->opaque;
554 return send_all(s->fd_out, buf, len);
555 }
556
557 static int fd_chr_read_poll(void *opaque)
558 {
559 CharDriverState *chr = opaque;
560 FDCharDriver *s = chr->opaque;
561
562 s->max_size = qemu_chr_can_read(chr);
563 return s->max_size;
564 }
565
566 static void fd_chr_read(void *opaque)
567 {
568 CharDriverState *chr = opaque;
569 FDCharDriver *s = chr->opaque;
570 int size, len;
571 uint8_t buf[READ_BUF_LEN];
572
573 len = sizeof(buf);
574 if (len > s->max_size)
575 len = s->max_size;
576 if (len == 0)
577 return;
578 size = read(s->fd_in, buf, len);
579 if (size == 0) {
580 /* FD has been closed. Remove it from the active list. */
581 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
582 qemu_chr_event(chr, CHR_EVENT_CLOSED);
583 return;
584 }
585 if (size > 0) {
586 qemu_chr_read(chr, buf, size);
587 }
588 }
589
590 static void fd_chr_update_read_handler(CharDriverState *chr)
591 {
592 FDCharDriver *s = chr->opaque;
593
594 if (s->fd_in >= 0) {
595 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
596 } else {
597 qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
598 fd_chr_read, NULL, chr);
599 }
600 }
601 }
602
603 static void fd_chr_close(struct CharDriverState *chr)
604 {
605 FDCharDriver *s = chr->opaque;
606
607 if (s->fd_in >= 0) {
608 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
609 } else {
610 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
611 }
612 }
613
614 qemu_free(s);
615 qemu_chr_event(chr, CHR_EVENT_CLOSED);
616 }
617
618 /* open a character device to a unix fd */
619 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
620 {
621 CharDriverState *chr;
622 FDCharDriver *s;
623
624 chr = qemu_mallocz(sizeof(CharDriverState));
625 s = qemu_mallocz(sizeof(FDCharDriver));
626 s->fd_in = fd_in;
627 s->fd_out = fd_out;
628 chr->opaque = s;
629 chr->chr_write = fd_chr_write;
630 chr->chr_update_read_handler = fd_chr_update_read_handler;
631 chr->chr_close = fd_chr_close;
632
633 qemu_chr_generic_open(chr);
634
635 return chr;
636 }
637
638 static CharDriverState *qemu_chr_open_file_out(QemuOpts *opts)
639 {
640 int fd_out;
641
642 TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
643 O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
644 if (fd_out < 0)
645 return NULL;
646 return qemu_chr_open_fd(-1, fd_out);
647 }
648
649 static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts)
650 {
651 int fd_in, fd_out;
652 char filename_in[256], filename_out[256];
653 const char *filename = qemu_opt_get(opts, "path");
654
655 if (filename == NULL) {
656 fprintf(stderr, "chardev: pipe: no filename given\n");
657 return NULL;
658 }
659
660 snprintf(filename_in, 256, "%s.in", filename);
661 snprintf(filename_out, 256, "%s.out", filename);
662 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
663 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
664 if (fd_in < 0 || fd_out < 0) {
665 if (fd_in >= 0)
666 close(fd_in);
667 if (fd_out >= 0)
668 close(fd_out);
669 TFR(fd_in = fd_out = open(filename, O_RDWR | O_BINARY));
670 if (fd_in < 0)
671 return NULL;
672 }
673 return qemu_chr_open_fd(fd_in, fd_out);
674 }
675
676
677 /* for STDIO, we handle the case where several clients use it
678 (nographic mode) */
679
680 #define TERM_FIFO_MAX_SIZE 1
681
682 static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
683 static int term_fifo_size;
684
685 static int stdio_read_poll(void *opaque)
686 {
687 CharDriverState *chr = opaque;
688
689 /* try to flush the queue if needed */
690 if (term_fifo_size != 0 && qemu_chr_can_read(chr) > 0) {
691 qemu_chr_read(chr, term_fifo, 1);
692 term_fifo_size = 0;
693 }
694 /* see if we can absorb more chars */
695 if (term_fifo_size == 0)
696 return 1;
697 else
698 return 0;
699 }
700
701 static void stdio_read(void *opaque)
702 {
703 int size;
704 uint8_t buf[1];
705 CharDriverState *chr = opaque;
706
707 size = read(0, buf, 1);
708 if (size == 0) {
709 /* stdin has been closed. Remove it from the active list. */
710 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
711 qemu_chr_event(chr, CHR_EVENT_CLOSED);
712 return;
713 }
714 if (size > 0) {
715 if (qemu_chr_can_read(chr) > 0) {
716 qemu_chr_read(chr, buf, 1);
717 } else if (term_fifo_size == 0) {
718 term_fifo[term_fifo_size++] = buf[0];
719 }
720 }
721 }
722
723 /* init terminal so that we can grab keys */
724 static struct termios oldtty;
725 static int old_fd0_flags;
726 static bool stdio_allow_signal;
727
728 static void term_exit(void)
729 {
730 tcsetattr (0, TCSANOW, &oldtty);
731 fcntl(0, F_SETFL, old_fd0_flags);
732 }
733
734 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
735 {
736 struct termios tty;
737
738 tty = oldtty;
739 if (!echo) {
740 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
741 |INLCR|IGNCR|ICRNL|IXON);
742 tty.c_oflag |= OPOST;
743 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
744 tty.c_cflag &= ~(CSIZE|PARENB);
745 tty.c_cflag |= CS8;
746 tty.c_cc[VMIN] = 1;
747 tty.c_cc[VTIME] = 0;
748 }
749 /* if graphical mode, we allow Ctrl-C handling */
750 if (!stdio_allow_signal)
751 tty.c_lflag &= ~ISIG;
752
753 tcsetattr (0, TCSANOW, &tty);
754 }
755
756 static void qemu_chr_close_stdio(struct CharDriverState *chr)
757 {
758 term_exit();
759 stdio_nb_clients--;
760 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
761 fd_chr_close(chr);
762 }
763
764 static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts)
765 {
766 CharDriverState *chr;
767
768 if (stdio_nb_clients >= STDIO_MAX_CLIENTS)
769 return NULL;
770 if (stdio_nb_clients == 0) {
771 old_fd0_flags = fcntl(0, F_GETFL);
772 tcgetattr (0, &oldtty);
773 fcntl(0, F_SETFL, O_NONBLOCK);
774 atexit(term_exit);
775 }
776
777 chr = qemu_chr_open_fd(0, 1);
778 chr->chr_close = qemu_chr_close_stdio;
779 chr->chr_set_echo = qemu_chr_set_echo_stdio;
780 qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
781 stdio_nb_clients++;
782 stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
783 display_type != DT_NOGRAPHIC);
784 qemu_chr_set_echo(chr, false);
785
786 return chr;
787 }
788
789 #ifdef __sun__
790 /* Once Solaris has openpty(), this is going to be removed. */
791 static int openpty(int *amaster, int *aslave, char *name,
792 struct termios *termp, struct winsize *winp)
793 {
794 const char *slave;
795 int mfd = -1, sfd = -1;
796
797 *amaster = *aslave = -1;
798
799 mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
800 if (mfd < 0)
801 goto err;
802
803 if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
804 goto err;
805
806 if ((slave = ptsname(mfd)) == NULL)
807 goto err;
808
809 if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
810 goto err;
811
812 if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
813 (termp != NULL && tcgetattr(sfd, termp) < 0))
814 goto err;
815
816 if (amaster)
817 *amaster = mfd;
818 if (aslave)
819 *aslave = sfd;
820 if (winp)
821 ioctl(sfd, TIOCSWINSZ, winp);
822
823 return 0;
824
825 err:
826 if (sfd != -1)
827 close(sfd);
828 close(mfd);
829 return -1;
830 }
831
832 static void cfmakeraw (struct termios *termios_p)
833 {
834 termios_p->c_iflag &=
835 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
836 termios_p->c_oflag &= ~OPOST;
837 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
838 termios_p->c_cflag &= ~(CSIZE|PARENB);
839 termios_p->c_cflag |= CS8;
840
841 termios_p->c_cc[VMIN] = 0;
842 termios_p->c_cc[VTIME] = 0;
843 }
844 #endif
845
846 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
847 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
848 || defined(__GLIBC__)
849
850 typedef struct {
851 int fd;
852 int connected;
853 int polling;
854 int read_bytes;
855 QEMUTimer *timer;
856 } PtyCharDriver;
857
858 static void pty_chr_update_read_handler(CharDriverState *chr);
859 static void pty_chr_state(CharDriverState *chr, int connected);
860
861 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
862 {
863 PtyCharDriver *s = chr->opaque;
864
865 if (!s->connected) {
866 /* guest sends data, check for (re-)connect */
867 pty_chr_update_read_handler(chr);
868 return 0;
869 }
870 return send_all(s->fd, buf, len);
871 }
872
873 static int pty_chr_read_poll(void *opaque)
874 {
875 CharDriverState *chr = opaque;
876 PtyCharDriver *s = chr->opaque;
877
878 s->read_bytes = qemu_chr_can_read(chr);
879 return s->read_bytes;
880 }
881
882 static void pty_chr_read(void *opaque)
883 {
884 CharDriverState *chr = opaque;
885 PtyCharDriver *s = chr->opaque;
886 int size, len;
887 uint8_t buf[READ_BUF_LEN];
888
889 len = sizeof(buf);
890 if (len > s->read_bytes)
891 len = s->read_bytes;
892 if (len == 0)
893 return;
894 size = read(s->fd, buf, len);
895 if ((size == -1 && errno == EIO) ||
896 (size == 0)) {
897 pty_chr_state(chr, 0);
898 return;
899 }
900 if (size > 0) {
901 pty_chr_state(chr, 1);
902 qemu_chr_read(chr, buf, size);
903 }
904 }
905
906 static void pty_chr_update_read_handler(CharDriverState *chr)
907 {
908 PtyCharDriver *s = chr->opaque;
909
910 qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
911 pty_chr_read, NULL, chr);
912 s->polling = 1;
913 /*
914 * Short timeout here: just need wait long enougth that qemu makes
915 * it through the poll loop once. When reconnected we want a
916 * short timeout so we notice it almost instantly. Otherwise
917 * read() gives us -EIO instantly, making pty_chr_state() reset the
918 * timeout to the normal (much longer) poll interval before the
919 * timer triggers.
920 */
921 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 10);
922 }
923
924 static void pty_chr_state(CharDriverState *chr, int connected)
925 {
926 PtyCharDriver *s = chr->opaque;
927
928 if (!connected) {
929 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
930 s->connected = 0;
931 s->polling = 0;
932 /* (re-)connect poll interval for idle guests: once per second.
933 * We check more frequently in case the guests sends data to
934 * the virtual device linked to our pty. */
935 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 1000);
936 } else {
937 if (!s->connected)
938 qemu_chr_generic_open(chr);
939 s->connected = 1;
940 }
941 }
942
943 static void pty_chr_timer(void *opaque)
944 {
945 struct CharDriverState *chr = opaque;
946 PtyCharDriver *s = chr->opaque;
947
948 if (s->connected)
949 return;
950 if (s->polling) {
951 /* If we arrive here without polling being cleared due
952 * read returning -EIO, then we are (re-)connected */
953 pty_chr_state(chr, 1);
954 return;
955 }
956
957 /* Next poll ... */
958 pty_chr_update_read_handler(chr);
959 }
960
961 static void pty_chr_close(struct CharDriverState *chr)
962 {
963 PtyCharDriver *s = chr->opaque;
964
965 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
966 close(s->fd);
967 qemu_del_timer(s->timer);
968 qemu_free_timer(s->timer);
969 qemu_free(s);
970 qemu_chr_event(chr, CHR_EVENT_CLOSED);
971 }
972
973 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
974 {
975 CharDriverState *chr;
976 PtyCharDriver *s;
977 struct termios tty;
978 int slave_fd, len;
979 #if defined(__OpenBSD__) || defined(__DragonFly__)
980 char pty_name[PATH_MAX];
981 #define q_ptsname(x) pty_name
982 #else
983 char *pty_name = NULL;
984 #define q_ptsname(x) ptsname(x)
985 #endif
986
987 chr = qemu_mallocz(sizeof(CharDriverState));
988 s = qemu_mallocz(sizeof(PtyCharDriver));
989
990 if (openpty(&s->fd, &slave_fd, pty_name, NULL, NULL) < 0) {
991 return NULL;
992 }
993
994 /* Set raw attributes on the pty. */
995 tcgetattr(slave_fd, &tty);
996 cfmakeraw(&tty);
997 tcsetattr(slave_fd, TCSAFLUSH, &tty);
998 close(slave_fd);
999
1000 len = strlen(q_ptsname(s->fd)) + 5;
1001 chr->filename = qemu_malloc(len);
1002 snprintf(chr->filename, len, "pty:%s", q_ptsname(s->fd));
1003 qemu_opt_set(opts, "path", q_ptsname(s->fd));
1004 fprintf(stderr, "char device redirected to %s\n", q_ptsname(s->fd));
1005
1006 chr->opaque = s;
1007 chr->chr_write = pty_chr_write;
1008 chr->chr_update_read_handler = pty_chr_update_read_handler;
1009 chr->chr_close = pty_chr_close;
1010
1011 s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr);
1012
1013 return chr;
1014 }
1015
1016 static void tty_serial_init(int fd, int speed,
1017 int parity, int data_bits, int stop_bits)
1018 {
1019 struct termios tty;
1020 speed_t spd;
1021
1022 #if 0
1023 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1024 speed, parity, data_bits, stop_bits);
1025 #endif
1026 tcgetattr (fd, &tty);
1027
1028 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1029 speed = speed * 10 / 11;
1030 do {
1031 check_speed(50);
1032 check_speed(75);
1033 check_speed(110);
1034 check_speed(134);
1035 check_speed(150);
1036 check_speed(200);
1037 check_speed(300);
1038 check_speed(600);
1039 check_speed(1200);
1040 check_speed(1800);
1041 check_speed(2400);
1042 check_speed(4800);
1043 check_speed(9600);
1044 check_speed(19200);
1045 check_speed(38400);
1046 /* Non-Posix values follow. They may be unsupported on some systems. */
1047 check_speed(57600);
1048 check_speed(115200);
1049 #ifdef B230400
1050 check_speed(230400);
1051 #endif
1052 #ifdef B460800
1053 check_speed(460800);
1054 #endif
1055 #ifdef B500000
1056 check_speed(500000);
1057 #endif
1058 #ifdef B576000
1059 check_speed(576000);
1060 #endif
1061 #ifdef B921600
1062 check_speed(921600);
1063 #endif
1064 #ifdef B1000000
1065 check_speed(1000000);
1066 #endif
1067 #ifdef B1152000
1068 check_speed(1152000);
1069 #endif
1070 #ifdef B1500000
1071 check_speed(1500000);
1072 #endif
1073 #ifdef B2000000
1074 check_speed(2000000);
1075 #endif
1076 #ifdef B2500000
1077 check_speed(2500000);
1078 #endif
1079 #ifdef B3000000
1080 check_speed(3000000);
1081 #endif
1082 #ifdef B3500000
1083 check_speed(3500000);
1084 #endif
1085 #ifdef B4000000
1086 check_speed(4000000);
1087 #endif
1088 spd = B115200;
1089 } while (0);
1090
1091 cfsetispeed(&tty, spd);
1092 cfsetospeed(&tty, spd);
1093
1094 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1095 |INLCR|IGNCR|ICRNL|IXON);
1096 tty.c_oflag |= OPOST;
1097 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1098 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1099 switch(data_bits) {
1100 default:
1101 case 8:
1102 tty.c_cflag |= CS8;
1103 break;
1104 case 7:
1105 tty.c_cflag |= CS7;
1106 break;
1107 case 6:
1108 tty.c_cflag |= CS6;
1109 break;
1110 case 5:
1111 tty.c_cflag |= CS5;
1112 break;
1113 }
1114 switch(parity) {
1115 default:
1116 case 'N':
1117 break;
1118 case 'E':
1119 tty.c_cflag |= PARENB;
1120 break;
1121 case 'O':
1122 tty.c_cflag |= PARENB | PARODD;
1123 break;
1124 }
1125 if (stop_bits == 2)
1126 tty.c_cflag |= CSTOPB;
1127
1128 tcsetattr (fd, TCSANOW, &tty);
1129 }
1130
1131 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1132 {
1133 FDCharDriver *s = chr->opaque;
1134
1135 switch(cmd) {
1136 case CHR_IOCTL_SERIAL_SET_PARAMS:
1137 {
1138 QEMUSerialSetParams *ssp = arg;
1139 tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1140 ssp->data_bits, ssp->stop_bits);
1141 }
1142 break;
1143 case CHR_IOCTL_SERIAL_SET_BREAK:
1144 {
1145 int enable = *(int *)arg;
1146 if (enable)
1147 tcsendbreak(s->fd_in, 1);
1148 }
1149 break;
1150 case CHR_IOCTL_SERIAL_GET_TIOCM:
1151 {
1152 int sarg = 0;
1153 int *targ = (int *)arg;
1154 ioctl(s->fd_in, TIOCMGET, &sarg);
1155 *targ = 0;
1156 if (sarg & TIOCM_CTS)
1157 *targ |= CHR_TIOCM_CTS;
1158 if (sarg & TIOCM_CAR)
1159 *targ |= CHR_TIOCM_CAR;
1160 if (sarg & TIOCM_DSR)
1161 *targ |= CHR_TIOCM_DSR;
1162 if (sarg & TIOCM_RI)
1163 *targ |= CHR_TIOCM_RI;
1164 if (sarg & TIOCM_DTR)
1165 *targ |= CHR_TIOCM_DTR;
1166 if (sarg & TIOCM_RTS)
1167 *targ |= CHR_TIOCM_RTS;
1168 }
1169 break;
1170 case CHR_IOCTL_SERIAL_SET_TIOCM:
1171 {
1172 int sarg = *(int *)arg;
1173 int targ = 0;
1174 ioctl(s->fd_in, TIOCMGET, &targ);
1175 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1176 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1177 if (sarg & CHR_TIOCM_CTS)
1178 targ |= TIOCM_CTS;
1179 if (sarg & CHR_TIOCM_CAR)
1180 targ |= TIOCM_CAR;
1181 if (sarg & CHR_TIOCM_DSR)
1182 targ |= TIOCM_DSR;
1183 if (sarg & CHR_TIOCM_RI)
1184 targ |= TIOCM_RI;
1185 if (sarg & CHR_TIOCM_DTR)
1186 targ |= TIOCM_DTR;
1187 if (sarg & CHR_TIOCM_RTS)
1188 targ |= TIOCM_RTS;
1189 ioctl(s->fd_in, TIOCMSET, &targ);
1190 }
1191 break;
1192 default:
1193 return -ENOTSUP;
1194 }
1195 return 0;
1196 }
1197
1198 static void qemu_chr_close_tty(CharDriverState *chr)
1199 {
1200 FDCharDriver *s = chr->opaque;
1201 int fd = -1;
1202
1203 if (s) {
1204 fd = s->fd_in;
1205 }
1206
1207 fd_chr_close(chr);
1208
1209 if (fd >= 0) {
1210 close(fd);
1211 }
1212 }
1213
1214 static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
1215 {
1216 const char *filename = qemu_opt_get(opts, "path");
1217 CharDriverState *chr;
1218 int fd;
1219
1220 TFR(fd = open(filename, O_RDWR | O_NONBLOCK));
1221 if (fd < 0) {
1222 return NULL;
1223 }
1224 tty_serial_init(fd, 115200, 'N', 8, 1);
1225 chr = qemu_chr_open_fd(fd, fd);
1226 if (!chr) {
1227 close(fd);
1228 return NULL;
1229 }
1230 chr->chr_ioctl = tty_serial_ioctl;
1231 chr->chr_close = qemu_chr_close_tty;
1232 return chr;
1233 }
1234 #else /* ! __linux__ && ! __sun__ */
1235 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
1236 {
1237 return NULL;
1238 }
1239 #endif /* __linux__ || __sun__ */
1240
1241 #if defined(__linux__)
1242 typedef struct {
1243 int fd;
1244 int mode;
1245 } ParallelCharDriver;
1246
1247 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1248 {
1249 if (s->mode != mode) {
1250 int m = mode;
1251 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1252 return 0;
1253 s->mode = mode;
1254 }
1255 return 1;
1256 }
1257
1258 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1259 {
1260 ParallelCharDriver *drv = chr->opaque;
1261 int fd = drv->fd;
1262 uint8_t b;
1263
1264 switch(cmd) {
1265 case CHR_IOCTL_PP_READ_DATA:
1266 if (ioctl(fd, PPRDATA, &b) < 0)
1267 return -ENOTSUP;
1268 *(uint8_t *)arg = b;
1269 break;
1270 case CHR_IOCTL_PP_WRITE_DATA:
1271 b = *(uint8_t *)arg;
1272 if (ioctl(fd, PPWDATA, &b) < 0)
1273 return -ENOTSUP;
1274 break;
1275 case CHR_IOCTL_PP_READ_CONTROL:
1276 if (ioctl(fd, PPRCONTROL, &b) < 0)
1277 return -ENOTSUP;
1278 /* Linux gives only the lowest bits, and no way to know data
1279 direction! For better compatibility set the fixed upper
1280 bits. */
1281 *(uint8_t *)arg = b | 0xc0;
1282 break;
1283 case CHR_IOCTL_PP_WRITE_CONTROL:
1284 b = *(uint8_t *)arg;
1285 if (ioctl(fd, PPWCONTROL, &b) < 0)
1286 return -ENOTSUP;
1287 break;
1288 case CHR_IOCTL_PP_READ_STATUS:
1289 if (ioctl(fd, PPRSTATUS, &b) < 0)
1290 return -ENOTSUP;
1291 *(uint8_t *)arg = b;
1292 break;
1293 case CHR_IOCTL_PP_DATA_DIR:
1294 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1295 return -ENOTSUP;
1296 break;
1297 case CHR_IOCTL_PP_EPP_READ_ADDR:
1298 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1299 struct ParallelIOArg *parg = arg;
1300 int n = read(fd, parg->buffer, parg->count);
1301 if (n != parg->count) {
1302 return -EIO;
1303 }
1304 }
1305 break;
1306 case CHR_IOCTL_PP_EPP_READ:
1307 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1308 struct ParallelIOArg *parg = arg;
1309 int n = read(fd, parg->buffer, parg->count);
1310 if (n != parg->count) {
1311 return -EIO;
1312 }
1313 }
1314 break;
1315 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1316 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1317 struct ParallelIOArg *parg = arg;
1318 int n = write(fd, parg->buffer, parg->count);
1319 if (n != parg->count) {
1320 return -EIO;
1321 }
1322 }
1323 break;
1324 case CHR_IOCTL_PP_EPP_WRITE:
1325 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1326 struct ParallelIOArg *parg = arg;
1327 int n = write(fd, parg->buffer, parg->count);
1328 if (n != parg->count) {
1329 return -EIO;
1330 }
1331 }
1332 break;
1333 default:
1334 return -ENOTSUP;
1335 }
1336 return 0;
1337 }
1338
1339 static void pp_close(CharDriverState *chr)
1340 {
1341 ParallelCharDriver *drv = chr->opaque;
1342 int fd = drv->fd;
1343
1344 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1345 ioctl(fd, PPRELEASE);
1346 close(fd);
1347 qemu_free(drv);
1348 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1349 }
1350
1351 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1352 {
1353 const char *filename = qemu_opt_get(opts, "path");
1354 CharDriverState *chr;
1355 ParallelCharDriver *drv;
1356 int fd;
1357
1358 TFR(fd = open(filename, O_RDWR));
1359 if (fd < 0)
1360 return NULL;
1361
1362 if (ioctl(fd, PPCLAIM) < 0) {
1363 close(fd);
1364 return NULL;
1365 }
1366
1367 drv = qemu_mallocz(sizeof(ParallelCharDriver));
1368 drv->fd = fd;
1369 drv->mode = IEEE1284_MODE_COMPAT;
1370
1371 chr = qemu_mallocz(sizeof(CharDriverState));
1372 chr->chr_write = null_chr_write;
1373 chr->chr_ioctl = pp_ioctl;
1374 chr->chr_close = pp_close;
1375 chr->opaque = drv;
1376
1377 qemu_chr_generic_open(chr);
1378
1379 return chr;
1380 }
1381 #endif /* __linux__ */
1382
1383 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1384 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1385 {
1386 int fd = (int)(intptr_t)chr->opaque;
1387 uint8_t b;
1388
1389 switch(cmd) {
1390 case CHR_IOCTL_PP_READ_DATA:
1391 if (ioctl(fd, PPIGDATA, &b) < 0)
1392 return -ENOTSUP;
1393 *(uint8_t *)arg = b;
1394 break;
1395 case CHR_IOCTL_PP_WRITE_DATA:
1396 b = *(uint8_t *)arg;
1397 if (ioctl(fd, PPISDATA, &b) < 0)
1398 return -ENOTSUP;
1399 break;
1400 case CHR_IOCTL_PP_READ_CONTROL:
1401 if (ioctl(fd, PPIGCTRL, &b) < 0)
1402 return -ENOTSUP;
1403 *(uint8_t *)arg = b;
1404 break;
1405 case CHR_IOCTL_PP_WRITE_CONTROL:
1406 b = *(uint8_t *)arg;
1407 if (ioctl(fd, PPISCTRL, &b) < 0)
1408 return -ENOTSUP;
1409 break;
1410 case CHR_IOCTL_PP_READ_STATUS:
1411 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1412 return -ENOTSUP;
1413 *(uint8_t *)arg = b;
1414 break;
1415 default:
1416 return -ENOTSUP;
1417 }
1418 return 0;
1419 }
1420
1421 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1422 {
1423 const char *filename = qemu_opt_get(opts, "path");
1424 CharDriverState *chr;
1425 int fd;
1426
1427 fd = open(filename, O_RDWR);
1428 if (fd < 0)
1429 return NULL;
1430
1431 chr = qemu_mallocz(sizeof(CharDriverState));
1432 chr->opaque = (void *)(intptr_t)fd;
1433 chr->chr_write = null_chr_write;
1434 chr->chr_ioctl = pp_ioctl;
1435 return chr;
1436 }
1437 #endif
1438
1439 #else /* _WIN32 */
1440
1441 typedef struct {
1442 int max_size;
1443 HANDLE hcom, hrecv, hsend;
1444 OVERLAPPED orecv, osend;
1445 BOOL fpipe;
1446 DWORD len;
1447 } WinCharState;
1448
1449 #define NSENDBUF 2048
1450 #define NRECVBUF 2048
1451 #define MAXCONNECT 1
1452 #define NTIMEOUT 5000
1453
1454 static int win_chr_poll(void *opaque);
1455 static int win_chr_pipe_poll(void *opaque);
1456
1457 static void win_chr_close(CharDriverState *chr)
1458 {
1459 WinCharState *s = chr->opaque;
1460
1461 if (s->hsend) {
1462 CloseHandle(s->hsend);
1463 s->hsend = NULL;
1464 }
1465 if (s->hrecv) {
1466 CloseHandle(s->hrecv);
1467 s->hrecv = NULL;
1468 }
1469 if (s->hcom) {
1470 CloseHandle(s->hcom);
1471 s->hcom = NULL;
1472 }
1473 if (s->fpipe)
1474 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1475 else
1476 qemu_del_polling_cb(win_chr_poll, chr);
1477
1478 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1479 }
1480
1481 static int win_chr_init(CharDriverState *chr, const char *filename)
1482 {
1483 WinCharState *s = chr->opaque;
1484 COMMCONFIG comcfg;
1485 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1486 COMSTAT comstat;
1487 DWORD size;
1488 DWORD err;
1489
1490 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1491 if (!s->hsend) {
1492 fprintf(stderr, "Failed CreateEvent\n");
1493 goto fail;
1494 }
1495 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1496 if (!s->hrecv) {
1497 fprintf(stderr, "Failed CreateEvent\n");
1498 goto fail;
1499 }
1500
1501 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1502 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1503 if (s->hcom == INVALID_HANDLE_VALUE) {
1504 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1505 s->hcom = NULL;
1506 goto fail;
1507 }
1508
1509 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1510 fprintf(stderr, "Failed SetupComm\n");
1511 goto fail;
1512 }
1513
1514 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1515 size = sizeof(COMMCONFIG);
1516 GetDefaultCommConfig(filename, &comcfg, &size);
1517 comcfg.dcb.DCBlength = sizeof(DCB);
1518 CommConfigDialog(filename, NULL, &comcfg);
1519
1520 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1521 fprintf(stderr, "Failed SetCommState\n");
1522 goto fail;
1523 }
1524
1525 if (!SetCommMask(s->hcom, EV_ERR)) {
1526 fprintf(stderr, "Failed SetCommMask\n");
1527 goto fail;
1528 }
1529
1530 cto.ReadIntervalTimeout = MAXDWORD;
1531 if (!SetCommTimeouts(s->hcom, &cto)) {
1532 fprintf(stderr, "Failed SetCommTimeouts\n");
1533 goto fail;
1534 }
1535
1536 if (!ClearCommError(s->hcom, &err, &comstat)) {
1537 fprintf(stderr, "Failed ClearCommError\n");
1538 goto fail;
1539 }
1540 qemu_add_polling_cb(win_chr_poll, chr);
1541 return 0;
1542
1543 fail:
1544 win_chr_close(chr);
1545 return -1;
1546 }
1547
1548 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1549 {
1550 WinCharState *s = chr->opaque;
1551 DWORD len, ret, size, err;
1552
1553 len = len1;
1554 ZeroMemory(&s->osend, sizeof(s->osend));
1555 s->osend.hEvent = s->hsend;
1556 while (len > 0) {
1557 if (s->hsend)
1558 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1559 else
1560 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1561 if (!ret) {
1562 err = GetLastError();
1563 if (err == ERROR_IO_PENDING) {
1564 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1565 if (ret) {
1566 buf += size;
1567 len -= size;
1568 } else {
1569 break;
1570 }
1571 } else {
1572 break;
1573 }
1574 } else {
1575 buf += size;
1576 len -= size;
1577 }
1578 }
1579 return len1 - len;
1580 }
1581
1582 static int win_chr_read_poll(CharDriverState *chr)
1583 {
1584 WinCharState *s = chr->opaque;
1585
1586 s->max_size = qemu_chr_can_read(chr);
1587 return s->max_size;
1588 }
1589
1590 static void win_chr_readfile(CharDriverState *chr)
1591 {
1592 WinCharState *s = chr->opaque;
1593 int ret, err;
1594 uint8_t buf[READ_BUF_LEN];
1595 DWORD size;
1596
1597 ZeroMemory(&s->orecv, sizeof(s->orecv));
1598 s->orecv.hEvent = s->hrecv;
1599 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1600 if (!ret) {
1601 err = GetLastError();
1602 if (err == ERROR_IO_PENDING) {
1603 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1604 }
1605 }
1606
1607 if (size > 0) {
1608 qemu_chr_read(chr, buf, size);
1609 }
1610 }
1611
1612 static void win_chr_read(CharDriverState *chr)
1613 {
1614 WinCharState *s = chr->opaque;
1615
1616 if (s->len > s->max_size)
1617 s->len = s->max_size;
1618 if (s->len == 0)
1619 return;
1620
1621 win_chr_readfile(chr);
1622 }
1623
1624 static int win_chr_poll(void *opaque)
1625 {
1626 CharDriverState *chr = opaque;
1627 WinCharState *s = chr->opaque;
1628 COMSTAT status;
1629 DWORD comerr;
1630
1631 ClearCommError(s->hcom, &comerr, &status);
1632 if (status.cbInQue > 0) {
1633 s->len = status.cbInQue;
1634 win_chr_read_poll(chr);
1635 win_chr_read(chr);
1636 return 1;
1637 }
1638 return 0;
1639 }
1640
1641 static CharDriverState *qemu_chr_open_win(QemuOpts *opts)
1642 {
1643 const char *filename = qemu_opt_get(opts, "path");
1644 CharDriverState *chr;
1645 WinCharState *s;
1646
1647 chr = qemu_mallocz(sizeof(CharDriverState));
1648 s = qemu_mallocz(sizeof(WinCharState));
1649 chr->opaque = s;
1650 chr->chr_write = win_chr_write;
1651 chr->chr_close = win_chr_close;
1652
1653 if (win_chr_init(chr, filename) < 0) {
1654 free(s);
1655 free(chr);
1656 return NULL;
1657 }
1658 qemu_chr_generic_open(chr);
1659 return chr;
1660 }
1661
1662 static int win_chr_pipe_poll(void *opaque)
1663 {
1664 CharDriverState *chr = opaque;
1665 WinCharState *s = chr->opaque;
1666 DWORD size;
1667
1668 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1669 if (size > 0) {
1670 s->len = size;
1671 win_chr_read_poll(chr);
1672 win_chr_read(chr);
1673 return 1;
1674 }
1675 return 0;
1676 }
1677
1678 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1679 {
1680 WinCharState *s = chr->opaque;
1681 OVERLAPPED ov;
1682 int ret;
1683 DWORD size;
1684 char openname[256];
1685
1686 s->fpipe = TRUE;
1687
1688 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1689 if (!s->hsend) {
1690 fprintf(stderr, "Failed CreateEvent\n");
1691 goto fail;
1692 }
1693 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1694 if (!s->hrecv) {
1695 fprintf(stderr, "Failed CreateEvent\n");
1696 goto fail;
1697 }
1698
1699 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1700 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1701 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1702 PIPE_WAIT,
1703 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1704 if (s->hcom == INVALID_HANDLE_VALUE) {
1705 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1706 s->hcom = NULL;
1707 goto fail;
1708 }
1709
1710 ZeroMemory(&ov, sizeof(ov));
1711 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1712 ret = ConnectNamedPipe(s->hcom, &ov);
1713 if (ret) {
1714 fprintf(stderr, "Failed ConnectNamedPipe\n");
1715 goto fail;
1716 }
1717
1718 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1719 if (!ret) {
1720 fprintf(stderr, "Failed GetOverlappedResult\n");
1721 if (ov.hEvent) {
1722 CloseHandle(ov.hEvent);
1723 ov.hEvent = NULL;
1724 }
1725 goto fail;
1726 }
1727
1728 if (ov.hEvent) {
1729 CloseHandle(ov.hEvent);
1730 ov.hEvent = NULL;
1731 }
1732 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1733 return 0;
1734
1735 fail:
1736 win_chr_close(chr);
1737 return -1;
1738 }
1739
1740
1741 static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts)
1742 {
1743 const char *filename = qemu_opt_get(opts, "path");
1744 CharDriverState *chr;
1745 WinCharState *s;
1746
1747 chr = qemu_mallocz(sizeof(CharDriverState));
1748 s = qemu_mallocz(sizeof(WinCharState));
1749 chr->opaque = s;
1750 chr->chr_write = win_chr_write;
1751 chr->chr_close = win_chr_close;
1752
1753 if (win_chr_pipe_init(chr, filename) < 0) {
1754 free(s);
1755 free(chr);
1756 return NULL;
1757 }
1758 qemu_chr_generic_open(chr);
1759 return chr;
1760 }
1761
1762 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1763 {
1764 CharDriverState *chr;
1765 WinCharState *s;
1766
1767 chr = qemu_mallocz(sizeof(CharDriverState));
1768 s = qemu_mallocz(sizeof(WinCharState));
1769 s->hcom = fd_out;
1770 chr->opaque = s;
1771 chr->chr_write = win_chr_write;
1772 qemu_chr_generic_open(chr);
1773 return chr;
1774 }
1775
1776 static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts)
1777 {
1778 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1779 }
1780
1781 static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts)
1782 {
1783 const char *file_out = qemu_opt_get(opts, "path");
1784 HANDLE fd_out;
1785
1786 fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1787 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1788 if (fd_out == INVALID_HANDLE_VALUE)
1789 return NULL;
1790
1791 return qemu_chr_open_win_file(fd_out);
1792 }
1793 #endif /* !_WIN32 */
1794
1795 /***********************************************************/
1796 /* UDP Net console */
1797
1798 typedef struct {
1799 int fd;
1800 uint8_t buf[READ_BUF_LEN];
1801 int bufcnt;
1802 int bufptr;
1803 int max_size;
1804 } NetCharDriver;
1805
1806 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1807 {
1808 NetCharDriver *s = chr->opaque;
1809
1810 return send(s->fd, (const void *)buf, len, 0);
1811 }
1812
1813 static int udp_chr_read_poll(void *opaque)
1814 {
1815 CharDriverState *chr = opaque;
1816 NetCharDriver *s = chr->opaque;
1817
1818 s->max_size = qemu_chr_can_read(chr);
1819
1820 /* If there were any stray characters in the queue process them
1821 * first
1822 */
1823 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1824 qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1825 s->bufptr++;
1826 s->max_size = qemu_chr_can_read(chr);
1827 }
1828 return s->max_size;
1829 }
1830
1831 static void udp_chr_read(void *opaque)
1832 {
1833 CharDriverState *chr = opaque;
1834 NetCharDriver *s = chr->opaque;
1835
1836 if (s->max_size == 0)
1837 return;
1838 s->bufcnt = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1839 s->bufptr = s->bufcnt;
1840 if (s->bufcnt <= 0)
1841 return;
1842
1843 s->bufptr = 0;
1844 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1845 qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1846 s->bufptr++;
1847 s->max_size = qemu_chr_can_read(chr);
1848 }
1849 }
1850
1851 static void udp_chr_update_read_handler(CharDriverState *chr)
1852 {
1853 NetCharDriver *s = chr->opaque;
1854
1855 if (s->fd >= 0) {
1856 qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
1857 udp_chr_read, NULL, chr);
1858 }
1859 }
1860
1861 static void udp_chr_close(CharDriverState *chr)
1862 {
1863 NetCharDriver *s = chr->opaque;
1864 if (s->fd >= 0) {
1865 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1866 closesocket(s->fd);
1867 }
1868 qemu_free(s);
1869 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1870 }
1871
1872 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
1873 {
1874 CharDriverState *chr = NULL;
1875 NetCharDriver *s = NULL;
1876 int fd = -1;
1877
1878 chr = qemu_mallocz(sizeof(CharDriverState));
1879 s = qemu_mallocz(sizeof(NetCharDriver));
1880
1881 fd = inet_dgram_opts(opts);
1882 if (fd < 0) {
1883 fprintf(stderr, "inet_dgram_opts failed\n");
1884 goto return_err;
1885 }
1886
1887 s->fd = fd;
1888 s->bufcnt = 0;
1889 s->bufptr = 0;
1890 chr->opaque = s;
1891 chr->chr_write = udp_chr_write;
1892 chr->chr_update_read_handler = udp_chr_update_read_handler;
1893 chr->chr_close = udp_chr_close;
1894 return chr;
1895
1896 return_err:
1897 if (chr)
1898 free(chr);
1899 if (s)
1900 free(s);
1901 if (fd >= 0)
1902 closesocket(fd);
1903 return NULL;
1904 }
1905
1906 /***********************************************************/
1907 /* TCP Net console */
1908
1909 typedef struct {
1910 int fd, listen_fd;
1911 int connected;
1912 int max_size;
1913 int do_telnetopt;
1914 int do_nodelay;
1915 int is_unix;
1916 int msgfd;
1917 } TCPCharDriver;
1918
1919 static void tcp_chr_accept(void *opaque);
1920
1921 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1922 {
1923 TCPCharDriver *s = chr->opaque;
1924 if (s->connected) {
1925 return send_all(s->fd, buf, len);
1926 } else {
1927 /* XXX: indicate an error ? */
1928 return len;
1929 }
1930 }
1931
1932 static int tcp_chr_read_poll(void *opaque)
1933 {
1934 CharDriverState *chr = opaque;
1935 TCPCharDriver *s = chr->opaque;
1936 if (!s->connected)
1937 return 0;
1938 s->max_size = qemu_chr_can_read(chr);
1939 return s->max_size;
1940 }
1941
1942 #define IAC 255
1943 #define IAC_BREAK 243
1944 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
1945 TCPCharDriver *s,
1946 uint8_t *buf, int *size)
1947 {
1948 /* Handle any telnet client's basic IAC options to satisfy char by
1949 * char mode with no echo. All IAC options will be removed from
1950 * the buf and the do_telnetopt variable will be used to track the
1951 * state of the width of the IAC information.
1952 *
1953 * IAC commands come in sets of 3 bytes with the exception of the
1954 * "IAC BREAK" command and the double IAC.
1955 */
1956
1957 int i;
1958 int j = 0;
1959
1960 for (i = 0; i < *size; i++) {
1961 if (s->do_telnetopt > 1) {
1962 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
1963 /* Double IAC means send an IAC */
1964 if (j != i)
1965 buf[j] = buf[i];
1966 j++;
1967 s->do_telnetopt = 1;
1968 } else {
1969 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
1970 /* Handle IAC break commands by sending a serial break */
1971 qemu_chr_event(chr, CHR_EVENT_BREAK);
1972 s->do_telnetopt++;
1973 }
1974 s->do_telnetopt++;
1975 }
1976 if (s->do_telnetopt >= 4) {
1977 s->do_telnetopt = 1;
1978 }
1979 } else {
1980 if ((unsigned char)buf[i] == IAC) {
1981 s->do_telnetopt = 2;
1982 } else {
1983 if (j != i)
1984 buf[j] = buf[i];
1985 j++;
1986 }
1987 }
1988 }
1989 *size = j;
1990 }
1991
1992 static int tcp_get_msgfd(CharDriverState *chr)
1993 {
1994 TCPCharDriver *s = chr->opaque;
1995 int fd = s->msgfd;
1996 s->msgfd = -1;
1997 return fd;
1998 }
1999
2000 #ifndef _WIN32
2001 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2002 {
2003 TCPCharDriver *s = chr->opaque;
2004 struct cmsghdr *cmsg;
2005
2006 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2007 int fd;
2008
2009 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2010 cmsg->cmsg_level != SOL_SOCKET ||
2011 cmsg->cmsg_type != SCM_RIGHTS)
2012 continue;
2013
2014 fd = *((int *)CMSG_DATA(cmsg));
2015 if (fd < 0)
2016 continue;
2017
2018 if (s->msgfd != -1)
2019 close(s->msgfd);
2020 s->msgfd = fd;
2021 }
2022 }
2023
2024 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2025 {
2026 TCPCharDriver *s = chr->opaque;
2027 struct msghdr msg = { NULL, };
2028 struct iovec iov[1];
2029 union {
2030 struct cmsghdr cmsg;
2031 char control[CMSG_SPACE(sizeof(int))];
2032 } msg_control;
2033 ssize_t ret;
2034
2035 iov[0].iov_base = buf;
2036 iov[0].iov_len = len;
2037
2038 msg.msg_iov = iov;
2039 msg.msg_iovlen = 1;
2040 msg.msg_control = &msg_control;
2041 msg.msg_controllen = sizeof(msg_control);
2042
2043 ret = recvmsg(s->fd, &msg, 0);
2044 if (ret > 0 && s->is_unix)
2045 unix_process_msgfd(chr, &msg);
2046
2047 return ret;
2048 }
2049 #else
2050 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2051 {
2052 TCPCharDriver *s = chr->opaque;
2053 return recv(s->fd, buf, len, 0);
2054 }
2055 #endif
2056
2057 static void tcp_chr_read(void *opaque)
2058 {
2059 CharDriverState *chr = opaque;
2060 TCPCharDriver *s = chr->opaque;
2061 uint8_t buf[READ_BUF_LEN];
2062 int len, size;
2063
2064 if (!s->connected || s->max_size <= 0)
2065 return;
2066 len = sizeof(buf);
2067 if (len > s->max_size)
2068 len = s->max_size;
2069 size = tcp_chr_recv(chr, (void *)buf, len);
2070 if (size == 0) {
2071 /* connection closed */
2072 s->connected = 0;
2073 if (s->listen_fd >= 0) {
2074 qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2075 }
2076 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2077 closesocket(s->fd);
2078 s->fd = -1;
2079 qemu_chr_event(chr, CHR_EVENT_CLOSED);
2080 } else if (size > 0) {
2081 if (s->do_telnetopt)
2082 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2083 if (size > 0)
2084 qemu_chr_read(chr, buf, size);
2085 }
2086 }
2087
2088 #ifndef _WIN32
2089 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2090 {
2091 return qemu_chr_open_fd(eventfd, eventfd);
2092 }
2093 #endif
2094
2095 static void tcp_chr_connect(void *opaque)
2096 {
2097 CharDriverState *chr = opaque;
2098 TCPCharDriver *s = chr->opaque;
2099
2100 s->connected = 1;
2101 qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2102 tcp_chr_read, NULL, chr);
2103 qemu_chr_generic_open(chr);
2104 }
2105
2106 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2107 static void tcp_chr_telnet_init(int fd)
2108 {
2109 char buf[3];
2110 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2111 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2112 send(fd, (char *)buf, 3, 0);
2113 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2114 send(fd, (char *)buf, 3, 0);
2115 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2116 send(fd, (char *)buf, 3, 0);
2117 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2118 send(fd, (char *)buf, 3, 0);
2119 }
2120
2121 static void socket_set_nodelay(int fd)
2122 {
2123 int val = 1;
2124 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2125 }
2126
2127 static void tcp_chr_accept(void *opaque)
2128 {
2129 CharDriverState *chr = opaque;
2130 TCPCharDriver *s = chr->opaque;
2131 struct sockaddr_in saddr;
2132 #ifndef _WIN32
2133 struct sockaddr_un uaddr;
2134 #endif
2135 struct sockaddr *addr;
2136 socklen_t len;
2137 int fd;
2138
2139 for(;;) {
2140 #ifndef _WIN32
2141 if (s->is_unix) {
2142 len = sizeof(uaddr);
2143 addr = (struct sockaddr *)&uaddr;
2144 } else
2145 #endif
2146 {
2147 len = sizeof(saddr);
2148 addr = (struct sockaddr *)&saddr;
2149 }
2150 fd = qemu_accept(s->listen_fd, addr, &len);
2151 if (fd < 0 && errno != EINTR) {
2152 return;
2153 } else if (fd >= 0) {
2154 if (s->do_telnetopt)
2155 tcp_chr_telnet_init(fd);
2156 break;
2157 }
2158 }
2159 socket_set_nonblock(fd);
2160 if (s->do_nodelay)
2161 socket_set_nodelay(fd);
2162 s->fd = fd;
2163 qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2164 tcp_chr_connect(chr);
2165 }
2166
2167 static void tcp_chr_close(CharDriverState *chr)
2168 {
2169 TCPCharDriver *s = chr->opaque;
2170 if (s->fd >= 0) {
2171 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2172 closesocket(s->fd);
2173 }
2174 if (s->listen_fd >= 0) {
2175 qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2176 closesocket(s->listen_fd);
2177 }
2178 qemu_free(s);
2179 qemu_chr_event(chr, CHR_EVENT_CLOSED);
2180 }
2181
2182 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2183 {
2184 CharDriverState *chr = NULL;
2185 TCPCharDriver *s = NULL;
2186 int fd = -1;
2187 int is_listen;
2188 int is_waitconnect;
2189 int do_nodelay;
2190 int is_unix;
2191 int is_telnet;
2192
2193 is_listen = qemu_opt_get_bool(opts, "server", 0);
2194 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2195 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2196 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2197 is_unix = qemu_opt_get(opts, "path") != NULL;
2198 if (!is_listen)
2199 is_waitconnect = 0;
2200
2201 chr = qemu_mallocz(sizeof(CharDriverState));
2202 s = qemu_mallocz(sizeof(TCPCharDriver));
2203
2204 if (is_unix) {
2205 if (is_listen) {
2206 fd = unix_listen_opts(opts);
2207 } else {
2208 fd = unix_connect_opts(opts);
2209 }
2210 } else {
2211 if (is_listen) {
2212 fd = inet_listen_opts(opts, 0);
2213 } else {
2214 fd = inet_connect_opts(opts);
2215 }
2216 }
2217 if (fd < 0)
2218 goto fail;
2219
2220 if (!is_waitconnect)
2221 socket_set_nonblock(fd);
2222
2223 s->connected = 0;
2224 s->fd = -1;
2225 s->listen_fd = -1;
2226 s->msgfd = -1;
2227 s->is_unix = is_unix;
2228 s->do_nodelay = do_nodelay && !is_unix;
2229
2230 chr->opaque = s;
2231 chr->chr_write = tcp_chr_write;
2232 chr->chr_close = tcp_chr_close;
2233 chr->get_msgfd = tcp_get_msgfd;
2234
2235 if (is_listen) {
2236 s->listen_fd = fd;
2237 qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2238 if (is_telnet)
2239 s->do_telnetopt = 1;
2240
2241 } else {
2242 s->connected = 1;
2243 s->fd = fd;
2244 socket_set_nodelay(fd);
2245 tcp_chr_connect(chr);
2246 }
2247
2248 /* for "info chardev" monitor command */
2249 chr->filename = qemu_malloc(256);
2250 if (is_unix) {
2251 snprintf(chr->filename, 256, "unix:%s%s",
2252 qemu_opt_get(opts, "path"),
2253 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2254 } else if (is_telnet) {
2255 snprintf(chr->filename, 256, "telnet:%s:%s%s",
2256 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2257 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2258 } else {
2259 snprintf(chr->filename, 256, "tcp:%s:%s%s",
2260 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2261 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2262 }
2263
2264 if (is_listen && is_waitconnect) {
2265 printf("QEMU waiting for connection on: %s\n",
2266 chr->filename);
2267 tcp_chr_accept(chr);
2268 socket_set_nonblock(s->listen_fd);
2269 }
2270 return chr;
2271
2272 fail:
2273 if (fd >= 0)
2274 closesocket(fd);
2275 qemu_free(s);
2276 qemu_free(chr);
2277 return NULL;
2278 }
2279
2280 /***********************************************************/
2281 /* Memory chardev */
2282 typedef struct {
2283 size_t outbuf_size;
2284 size_t outbuf_capacity;
2285 uint8_t *outbuf;
2286 } MemoryDriver;
2287
2288 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2289 {
2290 MemoryDriver *d = chr->opaque;
2291
2292 /* TODO: the QString implementation has the same code, we should
2293 * introduce a generic way to do this in cutils.c */
2294 if (d->outbuf_capacity < d->outbuf_size + len) {
2295 /* grow outbuf */
2296 d->outbuf_capacity += len;
2297 d->outbuf_capacity *= 2;
2298 d->outbuf = qemu_realloc(d->outbuf, d->outbuf_capacity);
2299 }
2300
2301 memcpy(d->outbuf + d->outbuf_size, buf, len);
2302 d->outbuf_size += len;
2303
2304 return len;
2305 }
2306
2307 void qemu_chr_init_mem(CharDriverState *chr)
2308 {
2309 MemoryDriver *d;
2310
2311 d = qemu_malloc(sizeof(*d));
2312 d->outbuf_size = 0;
2313 d->outbuf_capacity = 4096;
2314 d->outbuf = qemu_mallocz(d->outbuf_capacity);
2315
2316 memset(chr, 0, sizeof(*chr));
2317 chr->opaque = d;
2318 chr->chr_write = mem_chr_write;
2319 }
2320
2321 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2322 {
2323 MemoryDriver *d = chr->opaque;
2324 return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2325 }
2326
2327 /* NOTE: this driver can not be closed with qemu_chr_close()! */
2328 void qemu_chr_close_mem(CharDriverState *chr)
2329 {
2330 MemoryDriver *d = chr->opaque;
2331
2332 qemu_free(d->outbuf);
2333 qemu_free(chr->opaque);
2334 chr->opaque = NULL;
2335 chr->chr_write = NULL;
2336 }
2337
2338 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2339 {
2340 const MemoryDriver *d = chr->opaque;
2341 return d->outbuf_size;
2342 }
2343
2344 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2345 {
2346 char host[65], port[33], width[8], height[8];
2347 int pos;
2348 const char *p;
2349 QemuOpts *opts;
2350
2351 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
2352 if (NULL == opts)
2353 return NULL;
2354
2355 if (strstart(filename, "mon:", &p)) {
2356 filename = p;
2357 qemu_opt_set(opts, "mux", "on");
2358 }
2359
2360 if (strcmp(filename, "null") == 0 ||
2361 strcmp(filename, "pty") == 0 ||
2362 strcmp(filename, "msmouse") == 0 ||
2363 strcmp(filename, "braille") == 0 ||
2364 strcmp(filename, "stdio") == 0) {
2365 qemu_opt_set(opts, "backend", filename);
2366 return opts;
2367 }
2368 if (strstart(filename, "vc", &p)) {
2369 qemu_opt_set(opts, "backend", "vc");
2370 if (*p == ':') {
2371 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2372 /* pixels */
2373 qemu_opt_set(opts, "width", width);
2374 qemu_opt_set(opts, "height", height);
2375 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2376 /* chars */
2377 qemu_opt_set(opts, "cols", width);
2378 qemu_opt_set(opts, "rows", height);
2379 } else {
2380 goto fail;
2381 }
2382 }
2383 return opts;
2384 }
2385 if (strcmp(filename, "con:") == 0) {
2386 qemu_opt_set(opts, "backend", "console");
2387 return opts;
2388 }
2389 if (strstart(filename, "COM", NULL)) {
2390 qemu_opt_set(opts, "backend", "serial");
2391 qemu_opt_set(opts, "path", filename);
2392 return opts;
2393 }
2394 if (strstart(filename, "file:", &p)) {
2395 qemu_opt_set(opts, "backend", "file");
2396 qemu_opt_set(opts, "path", p);
2397 return opts;
2398 }
2399 if (strstart(filename, "pipe:", &p)) {
2400 qemu_opt_set(opts, "backend", "pipe");
2401 qemu_opt_set(opts, "path", p);
2402 return opts;
2403 }
2404 if (strstart(filename, "tcp:", &p) ||
2405 strstart(filename, "telnet:", &p)) {
2406 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2407 host[0] = 0;
2408 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2409 goto fail;
2410 }
2411 qemu_opt_set(opts, "backend", "socket");
2412 qemu_opt_set(opts, "host", host);
2413 qemu_opt_set(opts, "port", port);
2414 if (p[pos] == ',') {
2415 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2416 goto fail;
2417 }
2418 if (strstart(filename, "telnet:", &p))
2419 qemu_opt_set(opts, "telnet", "on");
2420 return opts;
2421 }
2422 if (strstart(filename, "udp:", &p)) {
2423 qemu_opt_set(opts, "backend", "udp");
2424 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2425 host[0] = 0;
2426 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2427 goto fail;
2428 }
2429 }
2430 qemu_opt_set(opts, "host", host);
2431 qemu_opt_set(opts, "port", port);
2432 if (p[pos] == '@') {
2433 p += pos + 1;
2434 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2435 host[0] = 0;
2436 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2437 goto fail;
2438 }
2439 }
2440 qemu_opt_set(opts, "localaddr", host);
2441 qemu_opt_set(opts, "localport", port);
2442 }
2443 return opts;
2444 }
2445 if (strstart(filename, "unix:", &p)) {
2446 qemu_opt_set(opts, "backend", "socket");
2447 if (qemu_opts_do_parse(opts, p, "path") != 0)
2448 goto fail;
2449 return opts;
2450 }
2451 if (strstart(filename, "/dev/parport", NULL) ||
2452 strstart(filename, "/dev/ppi", NULL)) {
2453 qemu_opt_set(opts, "backend", "parport");
2454 qemu_opt_set(opts, "path", filename);
2455 return opts;
2456 }
2457 if (strstart(filename, "/dev/", NULL)) {
2458 qemu_opt_set(opts, "backend", "tty");
2459 qemu_opt_set(opts, "path", filename);
2460 return opts;
2461 }
2462
2463 fail:
2464 qemu_opts_del(opts);
2465 return NULL;
2466 }
2467
2468 static const struct {
2469 const char *name;
2470 CharDriverState *(*open)(QemuOpts *opts);
2471 } backend_table[] = {
2472 { .name = "null", .open = qemu_chr_open_null },
2473 { .name = "socket", .open = qemu_chr_open_socket },
2474 { .name = "udp", .open = qemu_chr_open_udp },
2475 { .name = "msmouse", .open = qemu_chr_open_msmouse },
2476 { .name = "vc", .open = text_console_init },
2477 #ifdef _WIN32
2478 { .name = "file", .open = qemu_chr_open_win_file_out },
2479 { .name = "pipe", .open = qemu_chr_open_win_pipe },
2480 { .name = "console", .open = qemu_chr_open_win_con },
2481 { .name = "serial", .open = qemu_chr_open_win },
2482 #else
2483 { .name = "file", .open = qemu_chr_open_file_out },
2484 { .name = "pipe", .open = qemu_chr_open_pipe },
2485 { .name = "pty", .open = qemu_chr_open_pty },
2486 { .name = "stdio", .open = qemu_chr_open_stdio },
2487 #endif
2488 #ifdef CONFIG_BRLAPI
2489 { .name = "braille", .open = chr_baum_init },
2490 #endif
2491 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2492 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
2493 || defined(__FreeBSD_kernel__)
2494 { .name = "tty", .open = qemu_chr_open_tty },
2495 #endif
2496 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
2497 || defined(__FreeBSD_kernel__)
2498 { .name = "parport", .open = qemu_chr_open_pp },
2499 #endif
2500 #ifdef CONFIG_SPICE
2501 { .name = "spicevmc", .open = qemu_chr_open_spice },
2502 #endif
2503 };
2504
2505 CharDriverState *qemu_chr_open_opts(QemuOpts *opts,
2506 void (*init)(struct CharDriverState *s))
2507 {
2508 CharDriverState *chr;
2509 int i;
2510
2511 if (qemu_opts_id(opts) == NULL) {
2512 fprintf(stderr, "chardev: no id specified\n");
2513 return NULL;
2514 }
2515
2516 if (qemu_opt_get(opts, "backend") == NULL) {
2517 fprintf(stderr, "chardev: \"%s\" missing backend\n",
2518 qemu_opts_id(opts));
2519 return NULL;
2520 }
2521 for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2522 if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2523 break;
2524 }
2525 if (i == ARRAY_SIZE(backend_table)) {
2526 fprintf(stderr, "chardev: backend \"%s\" not found\n",
2527 qemu_opt_get(opts, "backend"));
2528 return NULL;
2529 }
2530
2531 chr = backend_table[i].open(opts);
2532 if (!chr) {
2533 fprintf(stderr, "chardev: opening backend \"%s\" failed\n",
2534 qemu_opt_get(opts, "backend"));
2535 return NULL;
2536 }
2537
2538 if (!chr->filename)
2539 chr->filename = qemu_strdup(qemu_opt_get(opts, "backend"));
2540 chr->init = init;
2541 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2542
2543 if (qemu_opt_get_bool(opts, "mux", 0)) {
2544 CharDriverState *base = chr;
2545 int len = strlen(qemu_opts_id(opts)) + 6;
2546 base->label = qemu_malloc(len);
2547 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
2548 chr = qemu_chr_open_mux(base);
2549 chr->filename = base->filename;
2550 chr->avail_connections = MAX_MUX;
2551 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2552 } else {
2553 chr->avail_connections = 1;
2554 }
2555 chr->label = qemu_strdup(qemu_opts_id(opts));
2556 return chr;
2557 }
2558
2559 CharDriverState *qemu_chr_open(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2560 {
2561 const char *p;
2562 CharDriverState *chr;
2563 QemuOpts *opts;
2564
2565 if (strstart(filename, "chardev:", &p)) {
2566 return qemu_chr_find(p);
2567 }
2568
2569 opts = qemu_chr_parse_compat(label, filename);
2570 if (!opts)
2571 return NULL;
2572
2573 chr = qemu_chr_open_opts(opts, init);
2574 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
2575 monitor_init(chr, MONITOR_USE_READLINE);
2576 }
2577 qemu_opts_del(opts);
2578 return chr;
2579 }
2580
2581 void qemu_chr_set_echo(struct CharDriverState *chr, bool echo)
2582 {
2583 if (chr->chr_set_echo) {
2584 chr->chr_set_echo(chr, echo);
2585 }
2586 }
2587
2588 void qemu_chr_guest_open(struct CharDriverState *chr)
2589 {
2590 if (chr->chr_guest_open) {
2591 chr->chr_guest_open(chr);
2592 }
2593 }
2594
2595 void qemu_chr_guest_close(struct CharDriverState *chr)
2596 {
2597 if (chr->chr_guest_close) {
2598 chr->chr_guest_close(chr);
2599 }
2600 }
2601
2602 void qemu_chr_close(CharDriverState *chr)
2603 {
2604 QTAILQ_REMOVE(&chardevs, chr, next);
2605 if (chr->chr_close)
2606 chr->chr_close(chr);
2607 qemu_free(chr->filename);
2608 qemu_free(chr->label);
2609 qemu_free(chr);
2610 }
2611
2612 static void qemu_chr_qlist_iter(QObject *obj, void *opaque)
2613 {
2614 QDict *chr_dict;
2615 Monitor *mon = opaque;
2616
2617 chr_dict = qobject_to_qdict(obj);
2618 monitor_printf(mon, "%s: filename=%s\n", qdict_get_str(chr_dict, "label"),
2619 qdict_get_str(chr_dict, "filename"));
2620 }
2621
2622 void qemu_chr_info_print(Monitor *mon, const QObject *ret_data)
2623 {
2624 qlist_iter(qobject_to_qlist(ret_data), qemu_chr_qlist_iter, mon);
2625 }
2626
2627 void qemu_chr_info(Monitor *mon, QObject **ret_data)
2628 {
2629 QList *chr_list;
2630 CharDriverState *chr;
2631
2632 chr_list = qlist_new();
2633
2634 QTAILQ_FOREACH(chr, &chardevs, next) {
2635 QObject *obj = qobject_from_jsonf("{ 'label': %s, 'filename': %s }",
2636 chr->label, chr->filename);
2637 qlist_append_obj(chr_list, obj);
2638 }
2639
2640 *ret_data = QOBJECT(chr_list);
2641 }
2642
2643 CharDriverState *qemu_chr_find(const char *name)
2644 {
2645 CharDriverState *chr;
2646
2647 QTAILQ_FOREACH(chr, &chardevs, next) {
2648 if (strcmp(chr->label, name) != 0)
2649 continue;
2650 return chr;
2651 }
2652 return NULL;
2653 }
Zhi Yong Wu's QEmu Source Tree - dev