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slirp: Forward ICMP echo requests via unprivileged sockets
[qemu.git] / qemu-char.c
blobfb13b28454cd1cda24f52b0ed9f0ebb635e07b13
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 void qemu_chr_accept_input(CharDriverState *s)
172 {
173 if (s->chr_accept_input)
174 s->chr_accept_input(s);
175 }
176
177 void qemu_chr_printf(CharDriverState *s, const char *fmt, ...)
178 {
179 char buf[READ_BUF_LEN];
180 va_list ap;
181 va_start(ap, fmt);
182 vsnprintf(buf, sizeof(buf), fmt, ap);
183 qemu_chr_write(s, (uint8_t *)buf, strlen(buf));
184 va_end(ap);
185 }
186
187 void qemu_chr_send_event(CharDriverState *s, int event)
188 {
189 if (s->chr_send_event)
190 s->chr_send_event(s, event);
191 }
192
193 void qemu_chr_add_handlers(CharDriverState *s,
194 IOCanReadHandler *fd_can_read,
195 IOReadHandler *fd_read,
196 IOEventHandler *fd_event,
197 void *opaque)
198 {
199 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
200 /* chr driver being released. */
201 ++s->avail_connections;
202 }
203 s->chr_can_read = fd_can_read;
204 s->chr_read = fd_read;
205 s->chr_event = fd_event;
206 s->handler_opaque = opaque;
207 if (s->chr_update_read_handler)
208 s->chr_update_read_handler(s);
209
210 /* We're connecting to an already opened device, so let's make sure we
211 also get the open event */
212 if (s->opened) {
213 qemu_chr_generic_open(s);
214 }
215 }
216
217 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
218 {
219 return len;
220 }
221
222 static CharDriverState *qemu_chr_open_null(QemuOpts *opts)
223 {
224 CharDriverState *chr;
225
226 chr = qemu_mallocz(sizeof(CharDriverState));
227 chr->chr_write = null_chr_write;
228 return chr;
229 }
230
231 /* MUX driver for serial I/O splitting */
232 #define MAX_MUX 4
233 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
234 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
235 typedef struct {
236 IOCanReadHandler *chr_can_read[MAX_MUX];
237 IOReadHandler *chr_read[MAX_MUX];
238 IOEventHandler *chr_event[MAX_MUX];
239 void *ext_opaque[MAX_MUX];
240 CharDriverState *drv;
241 int focus;
242 int mux_cnt;
243 int term_got_escape;
244 int max_size;
245 /* Intermediate input buffer allows to catch escape sequences even if the
246 currently active device is not accepting any input - but only until it
247 is full as well. */
248 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
249 int prod[MAX_MUX];
250 int cons[MAX_MUX];
251 int timestamps;
252 int linestart;
253 int64_t timestamps_start;
254 } MuxDriver;
255
256
257 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
258 {
259 MuxDriver *d = chr->opaque;
260 int ret;
261 if (!d->timestamps) {
262 ret = d->drv->chr_write(d->drv, buf, len);
263 } else {
264 int i;
265
266 ret = 0;
267 for (i = 0; i < len; i++) {
268 if (d->linestart) {
269 char buf1[64];
270 int64_t ti;
271 int secs;
272
273 ti = qemu_get_clock_ms(rt_clock);
274 if (d->timestamps_start == -1)
275 d->timestamps_start = ti;
276 ti -= d->timestamps_start;
277 secs = ti / 1000;
278 snprintf(buf1, sizeof(buf1),
279 "[%02d:%02d:%02d.%03d] ",
280 secs / 3600,
281 (secs / 60) % 60,
282 secs % 60,
283 (int)(ti % 1000));
284 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
285 d->linestart = 0;
286 }
287 ret += d->drv->chr_write(d->drv, buf+i, 1);
288 if (buf[i] == '\n') {
289 d->linestart = 1;
290 }
291 }
292 }
293 return ret;
294 }
295
296 static const char * const mux_help[] = {
297 "% h print this help\n\r",
298 "% x exit emulator\n\r",
299 "% s save disk data back to file (if -snapshot)\n\r",
300 "% t toggle console timestamps\n\r"
301 "% b send break (magic sysrq)\n\r",
302 "% c switch between console and monitor\n\r",
303 "% % sends %\n\r",
304 NULL
305 };
306
307 int term_escape_char = 0x01; /* ctrl-a is used for escape */
308 static void mux_print_help(CharDriverState *chr)
309 {
310 int i, j;
311 char ebuf[15] = "Escape-Char";
312 char cbuf[50] = "\n\r";
313
314 if (term_escape_char > 0 && term_escape_char < 26) {
315 snprintf(cbuf, sizeof(cbuf), "\n\r");
316 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
317 } else {
318 snprintf(cbuf, sizeof(cbuf),
319 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
320 term_escape_char);
321 }
322 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
323 for (i = 0; mux_help[i] != NULL; i++) {
324 for (j=0; mux_help[i][j] != '\0'; j++) {
325 if (mux_help[i][j] == '%')
326 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
327 else
328 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
329 }
330 }
331 }
332
333 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
334 {
335 if (d->chr_event[mux_nr])
336 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
337 }
338
339 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
340 {
341 if (d->term_got_escape) {
342 d->term_got_escape = 0;
343 if (ch == term_escape_char)
344 goto send_char;
345 switch(ch) {
346 case '?':
347 case 'h':
348 mux_print_help(chr);
349 break;
350 case 'x':
351 {
352 const char *term = "QEMU: Terminated\n\r";
353 chr->chr_write(chr,(uint8_t *)term,strlen(term));
354 exit(0);
355 break;
356 }
357 case 's':
358 bdrv_commit_all();
359 break;
360 case 'b':
361 qemu_chr_event(chr, CHR_EVENT_BREAK);
362 break;
363 case 'c':
364 /* Switch to the next registered device */
365 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
366 d->focus++;
367 if (d->focus >= d->mux_cnt)
368 d->focus = 0;
369 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
370 break;
371 case 't':
372 d->timestamps = !d->timestamps;
373 d->timestamps_start = -1;
374 d->linestart = 0;
375 break;
376 }
377 } else if (ch == term_escape_char) {
378 d->term_got_escape = 1;
379 } else {
380 send_char:
381 return 1;
382 }
383 return 0;
384 }
385
386 static void mux_chr_accept_input(CharDriverState *chr)
387 {
388 MuxDriver *d = chr->opaque;
389 int m = d->focus;
390
391 while (d->prod[m] != d->cons[m] &&
392 d->chr_can_read[m] &&
393 d->chr_can_read[m](d->ext_opaque[m])) {
394 d->chr_read[m](d->ext_opaque[m],
395 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
396 }
397 }
398
399 static int mux_chr_can_read(void *opaque)
400 {
401 CharDriverState *chr = opaque;
402 MuxDriver *d = chr->opaque;
403 int m = d->focus;
404
405 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
406 return 1;
407 if (d->chr_can_read[m])
408 return d->chr_can_read[m](d->ext_opaque[m]);
409 return 0;
410 }
411
412 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
413 {
414 CharDriverState *chr = opaque;
415 MuxDriver *d = chr->opaque;
416 int m = d->focus;
417 int i;
418
419 mux_chr_accept_input (opaque);
420
421 for(i = 0; i < size; i++)
422 if (mux_proc_byte(chr, d, buf[i])) {
423 if (d->prod[m] == d->cons[m] &&
424 d->chr_can_read[m] &&
425 d->chr_can_read[m](d->ext_opaque[m]))
426 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
427 else
428 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
429 }
430 }
431
432 static void mux_chr_event(void *opaque, int event)
433 {
434 CharDriverState *chr = opaque;
435 MuxDriver *d = chr->opaque;
436 int i;
437
438 /* Send the event to all registered listeners */
439 for (i = 0; i < d->mux_cnt; i++)
440 mux_chr_send_event(d, i, event);
441 }
442
443 static void mux_chr_update_read_handler(CharDriverState *chr)
444 {
445 MuxDriver *d = chr->opaque;
446
447 if (d->mux_cnt >= MAX_MUX) {
448 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
449 return;
450 }
451 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
452 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
453 d->chr_read[d->mux_cnt] = chr->chr_read;
454 d->chr_event[d->mux_cnt] = chr->chr_event;
455 /* Fix up the real driver with mux routines */
456 if (d->mux_cnt == 0) {
457 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
458 mux_chr_event, chr);
459 }
460 if (d->focus != -1) {
461 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
462 }
463 d->focus = d->mux_cnt;
464 d->mux_cnt++;
465 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
466 }
467
468 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
469 {
470 CharDriverState *chr;
471 MuxDriver *d;
472
473 chr = qemu_mallocz(sizeof(CharDriverState));
474 d = qemu_mallocz(sizeof(MuxDriver));
475
476 chr->opaque = d;
477 d->drv = drv;
478 d->focus = -1;
479 chr->chr_write = mux_chr_write;
480 chr->chr_update_read_handler = mux_chr_update_read_handler;
481 chr->chr_accept_input = mux_chr_accept_input;
482 /* Frontend guest-open / -close notification is not support with muxes */
483 chr->chr_guest_open = NULL;
484 chr->chr_guest_close = NULL;
485
486 /* Muxes are always open on creation */
487 qemu_chr_generic_open(chr);
488
489 return chr;
490 }
491
492
493 #ifdef _WIN32
494 int send_all(int fd, const void *buf, int len1)
495 {
496 int ret, len;
497
498 len = len1;
499 while (len > 0) {
500 ret = send(fd, buf, len, 0);
501 if (ret < 0) {
502 errno = WSAGetLastError();
503 if (errno != WSAEWOULDBLOCK) {
504 return -1;
505 }
506 } else if (ret == 0) {
507 break;
508 } else {
509 buf += ret;
510 len -= ret;
511 }
512 }
513 return len1 - len;
514 }
515
516 #else
517
518 int send_all(int fd, const void *_buf, int len1)
519 {
520 int ret, len;
521 const uint8_t *buf = _buf;
522
523 len = len1;
524 while (len > 0) {
525 ret = write(fd, buf, len);
526 if (ret < 0) {
527 if (errno != EINTR && errno != EAGAIN)
528 return -1;
529 } else if (ret == 0) {
530 break;
531 } else {
532 buf += ret;
533 len -= ret;
534 }
535 }
536 return len1 - len;
537 }
538 #endif /* !_WIN32 */
539
540 #ifndef _WIN32
541
542 typedef struct {
543 int fd_in, fd_out;
544 int max_size;
545 } FDCharDriver;
546
547 #define STDIO_MAX_CLIENTS 1
548 static int stdio_nb_clients = 0;
549
550 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
551 {
552 FDCharDriver *s = chr->opaque;
553 return send_all(s->fd_out, buf, len);
554 }
555
556 static int fd_chr_read_poll(void *opaque)
557 {
558 CharDriverState *chr = opaque;
559 FDCharDriver *s = chr->opaque;
560
561 s->max_size = qemu_chr_can_read(chr);
562 return s->max_size;
563 }
564
565 static void fd_chr_read(void *opaque)
566 {
567 CharDriverState *chr = opaque;
568 FDCharDriver *s = chr->opaque;
569 int size, len;
570 uint8_t buf[READ_BUF_LEN];
571
572 len = sizeof(buf);
573 if (len > s->max_size)
574 len = s->max_size;
575 if (len == 0)
576 return;
577 size = read(s->fd_in, buf, len);
578 if (size == 0) {
579 /* FD has been closed. Remove it from the active list. */
580 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
581 qemu_chr_event(chr, CHR_EVENT_CLOSED);
582 return;
583 }
584 if (size > 0) {
585 qemu_chr_read(chr, buf, size);
586 }
587 }
588
589 static void fd_chr_update_read_handler(CharDriverState *chr)
590 {
591 FDCharDriver *s = chr->opaque;
592
593 if (s->fd_in >= 0) {
594 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
595 } else {
596 qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
597 fd_chr_read, NULL, chr);
598 }
599 }
600 }
601
602 static void fd_chr_close(struct CharDriverState *chr)
603 {
604 FDCharDriver *s = chr->opaque;
605
606 if (s->fd_in >= 0) {
607 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
608 } else {
609 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
610 }
611 }
612
613 qemu_free(s);
614 qemu_chr_event(chr, CHR_EVENT_CLOSED);
615 }
616
617 /* open a character device to a unix fd */
618 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
619 {
620 CharDriverState *chr;
621 FDCharDriver *s;
622
623 chr = qemu_mallocz(sizeof(CharDriverState));
624 s = qemu_mallocz(sizeof(FDCharDriver));
625 s->fd_in = fd_in;
626 s->fd_out = fd_out;
627 chr->opaque = s;
628 chr->chr_write = fd_chr_write;
629 chr->chr_update_read_handler = fd_chr_update_read_handler;
630 chr->chr_close = fd_chr_close;
631
632 qemu_chr_generic_open(chr);
633
634 return chr;
635 }
636
637 static CharDriverState *qemu_chr_open_file_out(QemuOpts *opts)
638 {
639 int fd_out;
640
641 TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
642 O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
643 if (fd_out < 0)
644 return NULL;
645 return qemu_chr_open_fd(-1, fd_out);
646 }
647
648 static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts)
649 {
650 int fd_in, fd_out;
651 char filename_in[256], filename_out[256];
652 const char *filename = qemu_opt_get(opts, "path");
653
654 if (filename == NULL) {
655 fprintf(stderr, "chardev: pipe: no filename given\n");
656 return NULL;
657 }
658
659 snprintf(filename_in, 256, "%s.in", filename);
660 snprintf(filename_out, 256, "%s.out", filename);
661 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
662 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
663 if (fd_in < 0 || fd_out < 0) {
664 if (fd_in >= 0)
665 close(fd_in);
666 if (fd_out >= 0)
667 close(fd_out);
668 TFR(fd_in = fd_out = open(filename, O_RDWR | O_BINARY));
669 if (fd_in < 0)
670 return NULL;
671 }
672 return qemu_chr_open_fd(fd_in, fd_out);
673 }
674
675
676 /* for STDIO, we handle the case where several clients use it
677 (nographic mode) */
678
679 #define TERM_FIFO_MAX_SIZE 1
680
681 static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
682 static int term_fifo_size;
683
684 static int stdio_read_poll(void *opaque)
685 {
686 CharDriverState *chr = opaque;
687
688 /* try to flush the queue if needed */
689 if (term_fifo_size != 0 && qemu_chr_can_read(chr) > 0) {
690 qemu_chr_read(chr, term_fifo, 1);
691 term_fifo_size = 0;
692 }
693 /* see if we can absorb more chars */
694 if (term_fifo_size == 0)
695 return 1;
696 else
697 return 0;
698 }
699
700 static void stdio_read(void *opaque)
701 {
702 int size;
703 uint8_t buf[1];
704 CharDriverState *chr = opaque;
705
706 size = read(0, buf, 1);
707 if (size == 0) {
708 /* stdin has been closed. Remove it from the active list. */
709 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
710 qemu_chr_event(chr, CHR_EVENT_CLOSED);
711 return;
712 }
713 if (size > 0) {
714 if (qemu_chr_can_read(chr) > 0) {
715 qemu_chr_read(chr, buf, 1);
716 } else if (term_fifo_size == 0) {
717 term_fifo[term_fifo_size++] = buf[0];
718 }
719 }
720 }
721
722 /* init terminal so that we can grab keys */
723 static struct termios oldtty;
724 static int old_fd0_flags;
725 static bool stdio_allow_signal;
726
727 static void term_exit(void)
728 {
729 tcsetattr (0, TCSANOW, &oldtty);
730 fcntl(0, F_SETFL, old_fd0_flags);
731 }
732
733 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
734 {
735 struct termios tty;
736
737 tty = oldtty;
738 if (!echo) {
739 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
740 |INLCR|IGNCR|ICRNL|IXON);
741 tty.c_oflag |= OPOST;
742 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
743 tty.c_cflag &= ~(CSIZE|PARENB);
744 tty.c_cflag |= CS8;
745 tty.c_cc[VMIN] = 1;
746 tty.c_cc[VTIME] = 0;
747 }
748 /* if graphical mode, we allow Ctrl-C handling */
749 if (!stdio_allow_signal)
750 tty.c_lflag &= ~ISIG;
751
752 tcsetattr (0, TCSANOW, &tty);
753 }
754
755 static void qemu_chr_close_stdio(struct CharDriverState *chr)
756 {
757 term_exit();
758 stdio_nb_clients--;
759 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
760 fd_chr_close(chr);
761 }
762
763 static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts)
764 {
765 CharDriverState *chr;
766
767 if (stdio_nb_clients >= STDIO_MAX_CLIENTS)
768 return NULL;
769 if (stdio_nb_clients == 0) {
770 old_fd0_flags = fcntl(0, F_GETFL);
771 tcgetattr (0, &oldtty);
772 fcntl(0, F_SETFL, O_NONBLOCK);
773 atexit(term_exit);
774 }
775
776 chr = qemu_chr_open_fd(0, 1);
777 chr->chr_close = qemu_chr_close_stdio;
778 chr->chr_set_echo = qemu_chr_set_echo_stdio;
779 qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
780 stdio_nb_clients++;
781 stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
782 display_type != DT_NOGRAPHIC);
783 qemu_chr_set_echo(chr, false);
784
785 return chr;
786 }
787
788 #ifdef __sun__
789 /* Once Solaris has openpty(), this is going to be removed. */
790 static int openpty(int *amaster, int *aslave, char *name,
791 struct termios *termp, struct winsize *winp)
792 {
793 const char *slave;
794 int mfd = -1, sfd = -1;
795
796 *amaster = *aslave = -1;
797
798 mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
799 if (mfd < 0)
800 goto err;
801
802 if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
803 goto err;
804
805 if ((slave = ptsname(mfd)) == NULL)
806 goto err;
807
808 if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
809 goto err;
810
811 if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
812 (termp != NULL && tcgetattr(sfd, termp) < 0))
813 goto err;
814
815 if (amaster)
816 *amaster = mfd;
817 if (aslave)
818 *aslave = sfd;
819 if (winp)
820 ioctl(sfd, TIOCSWINSZ, winp);
821
822 return 0;
823
824 err:
825 if (sfd != -1)
826 close(sfd);
827 close(mfd);
828 return -1;
829 }
830
831 static void cfmakeraw (struct termios *termios_p)
832 {
833 termios_p->c_iflag &=
834 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
835 termios_p->c_oflag &= ~OPOST;
836 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
837 termios_p->c_cflag &= ~(CSIZE|PARENB);
838 termios_p->c_cflag |= CS8;
839
840 termios_p->c_cc[VMIN] = 0;
841 termios_p->c_cc[VTIME] = 0;
842 }
843 #endif
844
845 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
846 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
847 || defined(__GLIBC__)
848
849 typedef struct {
850 int fd;
851 int connected;
852 int polling;
853 int read_bytes;
854 QEMUTimer *timer;
855 } PtyCharDriver;
856
857 static void pty_chr_update_read_handler(CharDriverState *chr);
858 static void pty_chr_state(CharDriverState *chr, int connected);
859
860 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
861 {
862 PtyCharDriver *s = chr->opaque;
863
864 if (!s->connected) {
865 /* guest sends data, check for (re-)connect */
866 pty_chr_update_read_handler(chr);
867 return 0;
868 }
869 return send_all(s->fd, buf, len);
870 }
871
872 static int pty_chr_read_poll(void *opaque)
873 {
874 CharDriverState *chr = opaque;
875 PtyCharDriver *s = chr->opaque;
876
877 s->read_bytes = qemu_chr_can_read(chr);
878 return s->read_bytes;
879 }
880
881 static void pty_chr_read(void *opaque)
882 {
883 CharDriverState *chr = opaque;
884 PtyCharDriver *s = chr->opaque;
885 int size, len;
886 uint8_t buf[READ_BUF_LEN];
887
888 len = sizeof(buf);
889 if (len > s->read_bytes)
890 len = s->read_bytes;
891 if (len == 0)
892 return;
893 size = read(s->fd, buf, len);
894 if ((size == -1 && errno == EIO) ||
895 (size == 0)) {
896 pty_chr_state(chr, 0);
897 return;
898 }
899 if (size > 0) {
900 pty_chr_state(chr, 1);
901 qemu_chr_read(chr, buf, size);
902 }
903 }
904
905 static void pty_chr_update_read_handler(CharDriverState *chr)
906 {
907 PtyCharDriver *s = chr->opaque;
908
909 qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
910 pty_chr_read, NULL, chr);
911 s->polling = 1;
912 /*
913 * Short timeout here: just need wait long enougth that qemu makes
914 * it through the poll loop once. When reconnected we want a
915 * short timeout so we notice it almost instantly. Otherwise
916 * read() gives us -EIO instantly, making pty_chr_state() reset the
917 * timeout to the normal (much longer) poll interval before the
918 * timer triggers.
919 */
920 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 10);
921 }
922
923 static void pty_chr_state(CharDriverState *chr, int connected)
924 {
925 PtyCharDriver *s = chr->opaque;
926
927 if (!connected) {
928 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
929 s->connected = 0;
930 s->polling = 0;
931 /* (re-)connect poll interval for idle guests: once per second.
932 * We check more frequently in case the guests sends data to
933 * the virtual device linked to our pty. */
934 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 1000);
935 } else {
936 if (!s->connected)
937 qemu_chr_generic_open(chr);
938 s->connected = 1;
939 }
940 }
941
942 static void pty_chr_timer(void *opaque)
943 {
944 struct CharDriverState *chr = opaque;
945 PtyCharDriver *s = chr->opaque;
946
947 if (s->connected)
948 return;
949 if (s->polling) {
950 /* If we arrive here without polling being cleared due
951 * read returning -EIO, then we are (re-)connected */
952 pty_chr_state(chr, 1);
953 return;
954 }
955
956 /* Next poll ... */
957 pty_chr_update_read_handler(chr);
958 }
959
960 static void pty_chr_close(struct CharDriverState *chr)
961 {
962 PtyCharDriver *s = chr->opaque;
963
964 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
965 close(s->fd);
966 qemu_del_timer(s->timer);
967 qemu_free_timer(s->timer);
968 qemu_free(s);
969 qemu_chr_event(chr, CHR_EVENT_CLOSED);
970 }
971
972 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
973 {
974 CharDriverState *chr;
975 PtyCharDriver *s;
976 struct termios tty;
977 int slave_fd, len;
978 #if defined(__OpenBSD__) || defined(__DragonFly__)
979 char pty_name[PATH_MAX];
980 #define q_ptsname(x) pty_name
981 #else
982 char *pty_name = NULL;
983 #define q_ptsname(x) ptsname(x)
984 #endif
985
986 chr = qemu_mallocz(sizeof(CharDriverState));
987 s = qemu_mallocz(sizeof(PtyCharDriver));
988
989 if (openpty(&s->fd, &slave_fd, pty_name, NULL, NULL) < 0) {
990 return NULL;
991 }
992
993 /* Set raw attributes on the pty. */
994 tcgetattr(slave_fd, &tty);
995 cfmakeraw(&tty);
996 tcsetattr(slave_fd, TCSAFLUSH, &tty);
997 close(slave_fd);
998
999 len = strlen(q_ptsname(s->fd)) + 5;
1000 chr->filename = qemu_malloc(len);
1001 snprintf(chr->filename, len, "pty:%s", q_ptsname(s->fd));
1002 qemu_opt_set(opts, "path", q_ptsname(s->fd));
1003 fprintf(stderr, "char device redirected to %s\n", q_ptsname(s->fd));
1004
1005 chr->opaque = s;
1006 chr->chr_write = pty_chr_write;
1007 chr->chr_update_read_handler = pty_chr_update_read_handler;
1008 chr->chr_close = pty_chr_close;
1009
1010 s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr);
1011
1012 return chr;
1013 }
1014
1015 static void tty_serial_init(int fd, int speed,
1016 int parity, int data_bits, int stop_bits)
1017 {
1018 struct termios tty;
1019 speed_t spd;
1020
1021 #if 0
1022 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1023 speed, parity, data_bits, stop_bits);
1024 #endif
1025 tcgetattr (fd, &tty);
1026
1027 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1028 speed = speed * 10 / 11;
1029 do {
1030 check_speed(50);
1031 check_speed(75);
1032 check_speed(110);
1033 check_speed(134);
1034 check_speed(150);
1035 check_speed(200);
1036 check_speed(300);
1037 check_speed(600);
1038 check_speed(1200);
1039 check_speed(1800);
1040 check_speed(2400);
1041 check_speed(4800);
1042 check_speed(9600);
1043 check_speed(19200);
1044 check_speed(38400);
1045 /* Non-Posix values follow. They may be unsupported on some systems. */
1046 check_speed(57600);
1047 check_speed(115200);
1048 #ifdef B230400
1049 check_speed(230400);
1050 #endif
1051 #ifdef B460800
1052 check_speed(460800);
1053 #endif
1054 #ifdef B500000
1055 check_speed(500000);
1056 #endif
1057 #ifdef B576000
1058 check_speed(576000);
1059 #endif
1060 #ifdef B921600
1061 check_speed(921600);
1062 #endif
1063 #ifdef B1000000
1064 check_speed(1000000);
1065 #endif
1066 #ifdef B1152000
1067 check_speed(1152000);
1068 #endif
1069 #ifdef B1500000
1070 check_speed(1500000);
1071 #endif
1072 #ifdef B2000000
1073 check_speed(2000000);
1074 #endif
1075 #ifdef B2500000
1076 check_speed(2500000);
1077 #endif
1078 #ifdef B3000000
1079 check_speed(3000000);
1080 #endif
1081 #ifdef B3500000
1082 check_speed(3500000);
1083 #endif
1084 #ifdef B4000000
1085 check_speed(4000000);
1086 #endif
1087 spd = B115200;
1088 } while (0);
1089
1090 cfsetispeed(&tty, spd);
1091 cfsetospeed(&tty, spd);
1092
1093 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1094 |INLCR|IGNCR|ICRNL|IXON);
1095 tty.c_oflag |= OPOST;
1096 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1097 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1098 switch(data_bits) {
1099 default:
1100 case 8:
1101 tty.c_cflag |= CS8;
1102 break;
1103 case 7:
1104 tty.c_cflag |= CS7;
1105 break;
1106 case 6:
1107 tty.c_cflag |= CS6;
1108 break;
1109 case 5:
1110 tty.c_cflag |= CS5;
1111 break;
1112 }
1113 switch(parity) {
1114 default:
1115 case 'N':
1116 break;
1117 case 'E':
1118 tty.c_cflag |= PARENB;
1119 break;
1120 case 'O':
1121 tty.c_cflag |= PARENB | PARODD;
1122 break;
1123 }
1124 if (stop_bits == 2)
1125 tty.c_cflag |= CSTOPB;
1126
1127 tcsetattr (fd, TCSANOW, &tty);
1128 }
1129
1130 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1131 {
1132 FDCharDriver *s = chr->opaque;
1133
1134 switch(cmd) {
1135 case CHR_IOCTL_SERIAL_SET_PARAMS:
1136 {
1137 QEMUSerialSetParams *ssp = arg;
1138 tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1139 ssp->data_bits, ssp->stop_bits);
1140 }
1141 break;
1142 case CHR_IOCTL_SERIAL_SET_BREAK:
1143 {
1144 int enable = *(int *)arg;
1145 if (enable)
1146 tcsendbreak(s->fd_in, 1);
1147 }
1148 break;
1149 case CHR_IOCTL_SERIAL_GET_TIOCM:
1150 {
1151 int sarg = 0;
1152 int *targ = (int *)arg;
1153 ioctl(s->fd_in, TIOCMGET, &sarg);
1154 *targ = 0;
1155 if (sarg & TIOCM_CTS)
1156 *targ |= CHR_TIOCM_CTS;
1157 if (sarg & TIOCM_CAR)
1158 *targ |= CHR_TIOCM_CAR;
1159 if (sarg & TIOCM_DSR)
1160 *targ |= CHR_TIOCM_DSR;
1161 if (sarg & TIOCM_RI)
1162 *targ |= CHR_TIOCM_RI;
1163 if (sarg & TIOCM_DTR)
1164 *targ |= CHR_TIOCM_DTR;
1165 if (sarg & TIOCM_RTS)
1166 *targ |= CHR_TIOCM_RTS;
1167 }
1168 break;
1169 case CHR_IOCTL_SERIAL_SET_TIOCM:
1170 {
1171 int sarg = *(int *)arg;
1172 int targ = 0;
1173 ioctl(s->fd_in, TIOCMGET, &targ);
1174 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1175 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1176 if (sarg & CHR_TIOCM_CTS)
1177 targ |= TIOCM_CTS;
1178 if (sarg & CHR_TIOCM_CAR)
1179 targ |= TIOCM_CAR;
1180 if (sarg & CHR_TIOCM_DSR)
1181 targ |= TIOCM_DSR;
1182 if (sarg & CHR_TIOCM_RI)
1183 targ |= TIOCM_RI;
1184 if (sarg & CHR_TIOCM_DTR)
1185 targ |= TIOCM_DTR;
1186 if (sarg & CHR_TIOCM_RTS)
1187 targ |= TIOCM_RTS;
1188 ioctl(s->fd_in, TIOCMSET, &targ);
1189 }
1190 break;
1191 default:
1192 return -ENOTSUP;
1193 }
1194 return 0;
1195 }
1196
1197 static void qemu_chr_close_tty(CharDriverState *chr)
1198 {
1199 FDCharDriver *s = chr->opaque;
1200 int fd = -1;
1201
1202 if (s) {
1203 fd = s->fd_in;
1204 }
1205
1206 fd_chr_close(chr);
1207
1208 if (fd >= 0) {
1209 close(fd);
1210 }
1211 }
1212
1213 static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
1214 {
1215 const char *filename = qemu_opt_get(opts, "path");
1216 CharDriverState *chr;
1217 int fd;
1218
1219 TFR(fd = open(filename, O_RDWR | O_NONBLOCK));
1220 if (fd < 0) {
1221 return NULL;
1222 }
1223 tty_serial_init(fd, 115200, 'N', 8, 1);
1224 chr = qemu_chr_open_fd(fd, fd);
1225 if (!chr) {
1226 close(fd);
1227 return NULL;
1228 }
1229 chr->chr_ioctl = tty_serial_ioctl;
1230 chr->chr_close = qemu_chr_close_tty;
1231 return chr;
1232 }
1233 #else /* ! __linux__ && ! __sun__ */
1234 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
1235 {
1236 return NULL;
1237 }
1238 #endif /* __linux__ || __sun__ */
1239
1240 #if defined(__linux__)
1241 typedef struct {
1242 int fd;
1243 int mode;
1244 } ParallelCharDriver;
1245
1246 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1247 {
1248 if (s->mode != mode) {
1249 int m = mode;
1250 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1251 return 0;
1252 s->mode = mode;
1253 }
1254 return 1;
1255 }
1256
1257 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1258 {
1259 ParallelCharDriver *drv = chr->opaque;
1260 int fd = drv->fd;
1261 uint8_t b;
1262
1263 switch(cmd) {
1264 case CHR_IOCTL_PP_READ_DATA:
1265 if (ioctl(fd, PPRDATA, &b) < 0)
1266 return -ENOTSUP;
1267 *(uint8_t *)arg = b;
1268 break;
1269 case CHR_IOCTL_PP_WRITE_DATA:
1270 b = *(uint8_t *)arg;
1271 if (ioctl(fd, PPWDATA, &b) < 0)
1272 return -ENOTSUP;
1273 break;
1274 case CHR_IOCTL_PP_READ_CONTROL:
1275 if (ioctl(fd, PPRCONTROL, &b) < 0)
1276 return -ENOTSUP;
1277 /* Linux gives only the lowest bits, and no way to know data
1278 direction! For better compatibility set the fixed upper
1279 bits. */
1280 *(uint8_t *)arg = b | 0xc0;
1281 break;
1282 case CHR_IOCTL_PP_WRITE_CONTROL:
1283 b = *(uint8_t *)arg;
1284 if (ioctl(fd, PPWCONTROL, &b) < 0)
1285 return -ENOTSUP;
1286 break;
1287 case CHR_IOCTL_PP_READ_STATUS:
1288 if (ioctl(fd, PPRSTATUS, &b) < 0)
1289 return -ENOTSUP;
1290 *(uint8_t *)arg = b;
1291 break;
1292 case CHR_IOCTL_PP_DATA_DIR:
1293 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1294 return -ENOTSUP;
1295 break;
1296 case CHR_IOCTL_PP_EPP_READ_ADDR:
1297 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1298 struct ParallelIOArg *parg = arg;
1299 int n = read(fd, parg->buffer, parg->count);
1300 if (n != parg->count) {
1301 return -EIO;
1302 }
1303 }
1304 break;
1305 case CHR_IOCTL_PP_EPP_READ:
1306 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1307 struct ParallelIOArg *parg = arg;
1308 int n = read(fd, parg->buffer, parg->count);
1309 if (n != parg->count) {
1310 return -EIO;
1311 }
1312 }
1313 break;
1314 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1315 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1316 struct ParallelIOArg *parg = arg;
1317 int n = write(fd, parg->buffer, parg->count);
1318 if (n != parg->count) {
1319 return -EIO;
1320 }
1321 }
1322 break;
1323 case CHR_IOCTL_PP_EPP_WRITE:
1324 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1325 struct ParallelIOArg *parg = arg;
1326 int n = write(fd, parg->buffer, parg->count);
1327 if (n != parg->count) {
1328 return -EIO;
1329 }
1330 }
1331 break;
1332 default:
1333 return -ENOTSUP;
1334 }
1335 return 0;
1336 }
1337
1338 static void pp_close(CharDriverState *chr)
1339 {
1340 ParallelCharDriver *drv = chr->opaque;
1341 int fd = drv->fd;
1342
1343 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1344 ioctl(fd, PPRELEASE);
1345 close(fd);
1346 qemu_free(drv);
1347 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1348 }
1349
1350 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1351 {
1352 const char *filename = qemu_opt_get(opts, "path");
1353 CharDriverState *chr;
1354 ParallelCharDriver *drv;
1355 int fd;
1356
1357 TFR(fd = open(filename, O_RDWR));
1358 if (fd < 0)
1359 return NULL;
1360
1361 if (ioctl(fd, PPCLAIM) < 0) {
1362 close(fd);
1363 return NULL;
1364 }
1365
1366 drv = qemu_mallocz(sizeof(ParallelCharDriver));
1367 drv->fd = fd;
1368 drv->mode = IEEE1284_MODE_COMPAT;
1369
1370 chr = qemu_mallocz(sizeof(CharDriverState));
1371 chr->chr_write = null_chr_write;
1372 chr->chr_ioctl = pp_ioctl;
1373 chr->chr_close = pp_close;
1374 chr->opaque = drv;
1375
1376 qemu_chr_generic_open(chr);
1377
1378 return chr;
1379 }
1380 #endif /* __linux__ */
1381
1382 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1383 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1384 {
1385 int fd = (int)(intptr_t)chr->opaque;
1386 uint8_t b;
1387
1388 switch(cmd) {
1389 case CHR_IOCTL_PP_READ_DATA:
1390 if (ioctl(fd, PPIGDATA, &b) < 0)
1391 return -ENOTSUP;
1392 *(uint8_t *)arg = b;
1393 break;
1394 case CHR_IOCTL_PP_WRITE_DATA:
1395 b = *(uint8_t *)arg;
1396 if (ioctl(fd, PPISDATA, &b) < 0)
1397 return -ENOTSUP;
1398 break;
1399 case CHR_IOCTL_PP_READ_CONTROL:
1400 if (ioctl(fd, PPIGCTRL, &b) < 0)
1401 return -ENOTSUP;
1402 *(uint8_t *)arg = b;
1403 break;
1404 case CHR_IOCTL_PP_WRITE_CONTROL:
1405 b = *(uint8_t *)arg;
1406 if (ioctl(fd, PPISCTRL, &b) < 0)
1407 return -ENOTSUP;
1408 break;
1409 case CHR_IOCTL_PP_READ_STATUS:
1410 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1411 return -ENOTSUP;
1412 *(uint8_t *)arg = b;
1413 break;
1414 default:
1415 return -ENOTSUP;
1416 }
1417 return 0;
1418 }
1419
1420 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1421 {
1422 const char *filename = qemu_opt_get(opts, "path");
1423 CharDriverState *chr;
1424 int fd;
1425
1426 fd = open(filename, O_RDWR);
1427 if (fd < 0)
1428 return NULL;
1429
1430 chr = qemu_mallocz(sizeof(CharDriverState));
1431 chr->opaque = (void *)(intptr_t)fd;
1432 chr->chr_write = null_chr_write;
1433 chr->chr_ioctl = pp_ioctl;
1434 return chr;
1435 }
1436 #endif
1437
1438 #else /* _WIN32 */
1439
1440 typedef struct {
1441 int max_size;
1442 HANDLE hcom, hrecv, hsend;
1443 OVERLAPPED orecv, osend;
1444 BOOL fpipe;
1445 DWORD len;
1446 } WinCharState;
1447
1448 #define NSENDBUF 2048
1449 #define NRECVBUF 2048
1450 #define MAXCONNECT 1
1451 #define NTIMEOUT 5000
1452
1453 static int win_chr_poll(void *opaque);
1454 static int win_chr_pipe_poll(void *opaque);
1455
1456 static void win_chr_close(CharDriverState *chr)
1457 {
1458 WinCharState *s = chr->opaque;
1459
1460 if (s->hsend) {
1461 CloseHandle(s->hsend);
1462 s->hsend = NULL;
1463 }
1464 if (s->hrecv) {
1465 CloseHandle(s->hrecv);
1466 s->hrecv = NULL;
1467 }
1468 if (s->hcom) {
1469 CloseHandle(s->hcom);
1470 s->hcom = NULL;
1471 }
1472 if (s->fpipe)
1473 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1474 else
1475 qemu_del_polling_cb(win_chr_poll, chr);
1476
1477 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1478 }
1479
1480 static int win_chr_init(CharDriverState *chr, const char *filename)
1481 {
1482 WinCharState *s = chr->opaque;
1483 COMMCONFIG comcfg;
1484 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1485 COMSTAT comstat;
1486 DWORD size;
1487 DWORD err;
1488
1489 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1490 if (!s->hsend) {
1491 fprintf(stderr, "Failed CreateEvent\n");
1492 goto fail;
1493 }
1494 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1495 if (!s->hrecv) {
1496 fprintf(stderr, "Failed CreateEvent\n");
1497 goto fail;
1498 }
1499
1500 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1501 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1502 if (s->hcom == INVALID_HANDLE_VALUE) {
1503 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1504 s->hcom = NULL;
1505 goto fail;
1506 }
1507
1508 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1509 fprintf(stderr, "Failed SetupComm\n");
1510 goto fail;
1511 }
1512
1513 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1514 size = sizeof(COMMCONFIG);
1515 GetDefaultCommConfig(filename, &comcfg, &size);
1516 comcfg.dcb.DCBlength = sizeof(DCB);
1517 CommConfigDialog(filename, NULL, &comcfg);
1518
1519 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1520 fprintf(stderr, "Failed SetCommState\n");
1521 goto fail;
1522 }
1523
1524 if (!SetCommMask(s->hcom, EV_ERR)) {
1525 fprintf(stderr, "Failed SetCommMask\n");
1526 goto fail;
1527 }
1528
1529 cto.ReadIntervalTimeout = MAXDWORD;
1530 if (!SetCommTimeouts(s->hcom, &cto)) {
1531 fprintf(stderr, "Failed SetCommTimeouts\n");
1532 goto fail;
1533 }
1534
1535 if (!ClearCommError(s->hcom, &err, &comstat)) {
1536 fprintf(stderr, "Failed ClearCommError\n");
1537 goto fail;
1538 }
1539 qemu_add_polling_cb(win_chr_poll, chr);
1540 return 0;
1541
1542 fail:
1543 win_chr_close(chr);
1544 return -1;
1545 }
1546
1547 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1548 {
1549 WinCharState *s = chr->opaque;
1550 DWORD len, ret, size, err;
1551
1552 len = len1;
1553 ZeroMemory(&s->osend, sizeof(s->osend));
1554 s->osend.hEvent = s->hsend;
1555 while (len > 0) {
1556 if (s->hsend)
1557 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1558 else
1559 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1560 if (!ret) {
1561 err = GetLastError();
1562 if (err == ERROR_IO_PENDING) {
1563 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1564 if (ret) {
1565 buf += size;
1566 len -= size;
1567 } else {
1568 break;
1569 }
1570 } else {
1571 break;
1572 }
1573 } else {
1574 buf += size;
1575 len -= size;
1576 }
1577 }
1578 return len1 - len;
1579 }
1580
1581 static int win_chr_read_poll(CharDriverState *chr)
1582 {
1583 WinCharState *s = chr->opaque;
1584
1585 s->max_size = qemu_chr_can_read(chr);
1586 return s->max_size;
1587 }
1588
1589 static void win_chr_readfile(CharDriverState *chr)
1590 {
1591 WinCharState *s = chr->opaque;
1592 int ret, err;
1593 uint8_t buf[READ_BUF_LEN];
1594 DWORD size;
1595
1596 ZeroMemory(&s->orecv, sizeof(s->orecv));
1597 s->orecv.hEvent = s->hrecv;
1598 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1599 if (!ret) {
1600 err = GetLastError();
1601 if (err == ERROR_IO_PENDING) {
1602 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1603 }
1604 }
1605
1606 if (size > 0) {
1607 qemu_chr_read(chr, buf, size);
1608 }
1609 }
1610
1611 static void win_chr_read(CharDriverState *chr)
1612 {
1613 WinCharState *s = chr->opaque;
1614
1615 if (s->len > s->max_size)
1616 s->len = s->max_size;
1617 if (s->len == 0)
1618 return;
1619
1620 win_chr_readfile(chr);
1621 }
1622
1623 static int win_chr_poll(void *opaque)
1624 {
1625 CharDriverState *chr = opaque;
1626 WinCharState *s = chr->opaque;
1627 COMSTAT status;
1628 DWORD comerr;
1629
1630 ClearCommError(s->hcom, &comerr, &status);
1631 if (status.cbInQue > 0) {
1632 s->len = status.cbInQue;
1633 win_chr_read_poll(chr);
1634 win_chr_read(chr);
1635 return 1;
1636 }
1637 return 0;
1638 }
1639
1640 static CharDriverState *qemu_chr_open_win(QemuOpts *opts)
1641 {
1642 const char *filename = qemu_opt_get(opts, "path");
1643 CharDriverState *chr;
1644 WinCharState *s;
1645
1646 chr = qemu_mallocz(sizeof(CharDriverState));
1647 s = qemu_mallocz(sizeof(WinCharState));
1648 chr->opaque = s;
1649 chr->chr_write = win_chr_write;
1650 chr->chr_close = win_chr_close;
1651
1652 if (win_chr_init(chr, filename) < 0) {
1653 free(s);
1654 free(chr);
1655 return NULL;
1656 }
1657 qemu_chr_generic_open(chr);
1658 return chr;
1659 }
1660
1661 static int win_chr_pipe_poll(void *opaque)
1662 {
1663 CharDriverState *chr = opaque;
1664 WinCharState *s = chr->opaque;
1665 DWORD size;
1666
1667 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1668 if (size > 0) {
1669 s->len = size;
1670 win_chr_read_poll(chr);
1671 win_chr_read(chr);
1672 return 1;
1673 }
1674 return 0;
1675 }
1676
1677 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1678 {
1679 WinCharState *s = chr->opaque;
1680 OVERLAPPED ov;
1681 int ret;
1682 DWORD size;
1683 char openname[256];
1684
1685 s->fpipe = TRUE;
1686
1687 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1688 if (!s->hsend) {
1689 fprintf(stderr, "Failed CreateEvent\n");
1690 goto fail;
1691 }
1692 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1693 if (!s->hrecv) {
1694 fprintf(stderr, "Failed CreateEvent\n");
1695 goto fail;
1696 }
1697
1698 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1699 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1700 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1701 PIPE_WAIT,
1702 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1703 if (s->hcom == INVALID_HANDLE_VALUE) {
1704 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1705 s->hcom = NULL;
1706 goto fail;
1707 }
1708
1709 ZeroMemory(&ov, sizeof(ov));
1710 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1711 ret = ConnectNamedPipe(s->hcom, &ov);
1712 if (ret) {
1713 fprintf(stderr, "Failed ConnectNamedPipe\n");
1714 goto fail;
1715 }
1716
1717 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1718 if (!ret) {
1719 fprintf(stderr, "Failed GetOverlappedResult\n");
1720 if (ov.hEvent) {
1721 CloseHandle(ov.hEvent);
1722 ov.hEvent = NULL;
1723 }
1724 goto fail;
1725 }
1726
1727 if (ov.hEvent) {
1728 CloseHandle(ov.hEvent);
1729 ov.hEvent = NULL;
1730 }
1731 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1732 return 0;
1733
1734 fail:
1735 win_chr_close(chr);
1736 return -1;
1737 }
1738
1739
1740 static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts)
1741 {
1742 const char *filename = qemu_opt_get(opts, "path");
1743 CharDriverState *chr;
1744 WinCharState *s;
1745
1746 chr = qemu_mallocz(sizeof(CharDriverState));
1747 s = qemu_mallocz(sizeof(WinCharState));
1748 chr->opaque = s;
1749 chr->chr_write = win_chr_write;
1750 chr->chr_close = win_chr_close;
1751
1752 if (win_chr_pipe_init(chr, filename) < 0) {
1753 free(s);
1754 free(chr);
1755 return NULL;
1756 }
1757 qemu_chr_generic_open(chr);
1758 return chr;
1759 }
1760
1761 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1762 {
1763 CharDriverState *chr;
1764 WinCharState *s;
1765
1766 chr = qemu_mallocz(sizeof(CharDriverState));
1767 s = qemu_mallocz(sizeof(WinCharState));
1768 s->hcom = fd_out;
1769 chr->opaque = s;
1770 chr->chr_write = win_chr_write;
1771 qemu_chr_generic_open(chr);
1772 return chr;
1773 }
1774
1775 static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts)
1776 {
1777 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1778 }
1779
1780 static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts)
1781 {
1782 const char *file_out = qemu_opt_get(opts, "path");
1783 HANDLE fd_out;
1784
1785 fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1786 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1787 if (fd_out == INVALID_HANDLE_VALUE)
1788 return NULL;
1789
1790 return qemu_chr_open_win_file(fd_out);
1791 }
1792 #endif /* !_WIN32 */
1793
1794 /***********************************************************/
1795 /* UDP Net console */
1796
1797 typedef struct {
1798 int fd;
1799 uint8_t buf[READ_BUF_LEN];
1800 int bufcnt;
1801 int bufptr;
1802 int max_size;
1803 } NetCharDriver;
1804
1805 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1806 {
1807 NetCharDriver *s = chr->opaque;
1808
1809 return send(s->fd, (const void *)buf, len, 0);
1810 }
1811
1812 static int udp_chr_read_poll(void *opaque)
1813 {
1814 CharDriverState *chr = opaque;
1815 NetCharDriver *s = chr->opaque;
1816
1817 s->max_size = qemu_chr_can_read(chr);
1818
1819 /* If there were any stray characters in the queue process them
1820 * first
1821 */
1822 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1823 qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1824 s->bufptr++;
1825 s->max_size = qemu_chr_can_read(chr);
1826 }
1827 return s->max_size;
1828 }
1829
1830 static void udp_chr_read(void *opaque)
1831 {
1832 CharDriverState *chr = opaque;
1833 NetCharDriver *s = chr->opaque;
1834
1835 if (s->max_size == 0)
1836 return;
1837 s->bufcnt = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1838 s->bufptr = s->bufcnt;
1839 if (s->bufcnt <= 0)
1840 return;
1841
1842 s->bufptr = 0;
1843 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1844 qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1845 s->bufptr++;
1846 s->max_size = qemu_chr_can_read(chr);
1847 }
1848 }
1849
1850 static void udp_chr_update_read_handler(CharDriverState *chr)
1851 {
1852 NetCharDriver *s = chr->opaque;
1853
1854 if (s->fd >= 0) {
1855 qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
1856 udp_chr_read, NULL, chr);
1857 }
1858 }
1859
1860 static void udp_chr_close(CharDriverState *chr)
1861 {
1862 NetCharDriver *s = chr->opaque;
1863 if (s->fd >= 0) {
1864 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1865 closesocket(s->fd);
1866 }
1867 qemu_free(s);
1868 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1869 }
1870
1871 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
1872 {
1873 CharDriverState *chr = NULL;
1874 NetCharDriver *s = NULL;
1875 int fd = -1;
1876
1877 chr = qemu_mallocz(sizeof(CharDriverState));
1878 s = qemu_mallocz(sizeof(NetCharDriver));
1879
1880 fd = inet_dgram_opts(opts);
1881 if (fd < 0) {
1882 fprintf(stderr, "inet_dgram_opts failed\n");
1883 goto return_err;
1884 }
1885
1886 s->fd = fd;
1887 s->bufcnt = 0;
1888 s->bufptr = 0;
1889 chr->opaque = s;
1890 chr->chr_write = udp_chr_write;
1891 chr->chr_update_read_handler = udp_chr_update_read_handler;
1892 chr->chr_close = udp_chr_close;
1893 return chr;
1894
1895 return_err:
1896 if (chr)
1897 free(chr);
1898 if (s)
1899 free(s);
1900 if (fd >= 0)
1901 closesocket(fd);
1902 return NULL;
1903 }
1904
1905 /***********************************************************/
1906 /* TCP Net console */
1907
1908 typedef struct {
1909 int fd, listen_fd;
1910 int connected;
1911 int max_size;
1912 int do_telnetopt;
1913 int do_nodelay;
1914 int is_unix;
1915 int msgfd;
1916 } TCPCharDriver;
1917
1918 static void tcp_chr_accept(void *opaque);
1919
1920 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1921 {
1922 TCPCharDriver *s = chr->opaque;
1923 if (s->connected) {
1924 return send_all(s->fd, buf, len);
1925 } else {
1926 /* XXX: indicate an error ? */
1927 return len;
1928 }
1929 }
1930
1931 static int tcp_chr_read_poll(void *opaque)
1932 {
1933 CharDriverState *chr = opaque;
1934 TCPCharDriver *s = chr->opaque;
1935 if (!s->connected)
1936 return 0;
1937 s->max_size = qemu_chr_can_read(chr);
1938 return s->max_size;
1939 }
1940
1941 #define IAC 255
1942 #define IAC_BREAK 243
1943 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
1944 TCPCharDriver *s,
1945 uint8_t *buf, int *size)
1946 {
1947 /* Handle any telnet client's basic IAC options to satisfy char by
1948 * char mode with no echo. All IAC options will be removed from
1949 * the buf and the do_telnetopt variable will be used to track the
1950 * state of the width of the IAC information.
1951 *
1952 * IAC commands come in sets of 3 bytes with the exception of the
1953 * "IAC BREAK" command and the double IAC.
1954 */
1955
1956 int i;
1957 int j = 0;
1958
1959 for (i = 0; i < *size; i++) {
1960 if (s->do_telnetopt > 1) {
1961 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
1962 /* Double IAC means send an IAC */
1963 if (j != i)
1964 buf[j] = buf[i];
1965 j++;
1966 s->do_telnetopt = 1;
1967 } else {
1968 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
1969 /* Handle IAC break commands by sending a serial break */
1970 qemu_chr_event(chr, CHR_EVENT_BREAK);
1971 s->do_telnetopt++;
1972 }
1973 s->do_telnetopt++;
1974 }
1975 if (s->do_telnetopt >= 4) {
1976 s->do_telnetopt = 1;
1977 }
1978 } else {
1979 if ((unsigned char)buf[i] == IAC) {
1980 s->do_telnetopt = 2;
1981 } else {
1982 if (j != i)
1983 buf[j] = buf[i];
1984 j++;
1985 }
1986 }
1987 }
1988 *size = j;
1989 }
1990
1991 static int tcp_get_msgfd(CharDriverState *chr)
1992 {
1993 TCPCharDriver *s = chr->opaque;
1994 int fd = s->msgfd;
1995 s->msgfd = -1;
1996 return fd;
1997 }
1998
1999 #ifndef _WIN32
2000 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2001 {
2002 TCPCharDriver *s = chr->opaque;
2003 struct cmsghdr *cmsg;
2004
2005 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2006 int fd;
2007
2008 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2009 cmsg->cmsg_level != SOL_SOCKET ||
2010 cmsg->cmsg_type != SCM_RIGHTS)
2011 continue;
2012
2013 fd = *((int *)CMSG_DATA(cmsg));
2014 if (fd < 0)
2015 continue;
2016
2017 if (s->msgfd != -1)
2018 close(s->msgfd);
2019 s->msgfd = fd;
2020 }
2021 }
2022
2023 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2024 {
2025 TCPCharDriver *s = chr->opaque;
2026 struct msghdr msg = { NULL, };
2027 struct iovec iov[1];
2028 union {
2029 struct cmsghdr cmsg;
2030 char control[CMSG_SPACE(sizeof(int))];
2031 } msg_control;
2032 ssize_t ret;
2033
2034 iov[0].iov_base = buf;
2035 iov[0].iov_len = len;
2036
2037 msg.msg_iov = iov;
2038 msg.msg_iovlen = 1;
2039 msg.msg_control = &msg_control;
2040 msg.msg_controllen = sizeof(msg_control);
2041
2042 ret = recvmsg(s->fd, &msg, 0);
2043 if (ret > 0 && s->is_unix)
2044 unix_process_msgfd(chr, &msg);
2045
2046 return ret;
2047 }
2048 #else
2049 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2050 {
2051 TCPCharDriver *s = chr->opaque;
2052 return recv(s->fd, buf, len, 0);
2053 }
2054 #endif
2055
2056 static void tcp_chr_read(void *opaque)
2057 {
2058 CharDriverState *chr = opaque;
2059 TCPCharDriver *s = chr->opaque;
2060 uint8_t buf[READ_BUF_LEN];
2061 int len, size;
2062
2063 if (!s->connected || s->max_size <= 0)
2064 return;
2065 len = sizeof(buf);
2066 if (len > s->max_size)
2067 len = s->max_size;
2068 size = tcp_chr_recv(chr, (void *)buf, len);
2069 if (size == 0) {
2070 /* connection closed */
2071 s->connected = 0;
2072 if (s->listen_fd >= 0) {
2073 qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2074 }
2075 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2076 closesocket(s->fd);
2077 s->fd = -1;
2078 qemu_chr_event(chr, CHR_EVENT_CLOSED);
2079 } else if (size > 0) {
2080 if (s->do_telnetopt)
2081 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2082 if (size > 0)
2083 qemu_chr_read(chr, buf, size);
2084 }
2085 }
2086
2087 #ifndef _WIN32
2088 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2089 {
2090 return qemu_chr_open_fd(eventfd, eventfd);
2091 }
2092 #endif
2093
2094 static void tcp_chr_connect(void *opaque)
2095 {
2096 CharDriverState *chr = opaque;
2097 TCPCharDriver *s = chr->opaque;
2098
2099 s->connected = 1;
2100 qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2101 tcp_chr_read, NULL, chr);
2102 qemu_chr_generic_open(chr);
2103 }
2104
2105 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2106 static void tcp_chr_telnet_init(int fd)
2107 {
2108 char buf[3];
2109 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2110 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2111 send(fd, (char *)buf, 3, 0);
2112 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2113 send(fd, (char *)buf, 3, 0);
2114 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2115 send(fd, (char *)buf, 3, 0);
2116 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2117 send(fd, (char *)buf, 3, 0);
2118 }
2119
2120 static void socket_set_nodelay(int fd)
2121 {
2122 int val = 1;
2123 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2124 }
2125
2126 static void tcp_chr_accept(void *opaque)
2127 {
2128 CharDriverState *chr = opaque;
2129 TCPCharDriver *s = chr->opaque;
2130 struct sockaddr_in saddr;
2131 #ifndef _WIN32
2132 struct sockaddr_un uaddr;
2133 #endif
2134 struct sockaddr *addr;
2135 socklen_t len;
2136 int fd;
2137
2138 for(;;) {
2139 #ifndef _WIN32
2140 if (s->is_unix) {
2141 len = sizeof(uaddr);
2142 addr = (struct sockaddr *)&uaddr;
2143 } else
2144 #endif
2145 {
2146 len = sizeof(saddr);
2147 addr = (struct sockaddr *)&saddr;
2148 }
2149 fd = qemu_accept(s->listen_fd, addr, &len);
2150 if (fd < 0 && errno != EINTR) {
2151 return;
2152 } else if (fd >= 0) {
2153 if (s->do_telnetopt)
2154 tcp_chr_telnet_init(fd);
2155 break;
2156 }
2157 }
2158 socket_set_nonblock(fd);
2159 if (s->do_nodelay)
2160 socket_set_nodelay(fd);
2161 s->fd = fd;
2162 qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2163 tcp_chr_connect(chr);
2164 }
2165
2166 static void tcp_chr_close(CharDriverState *chr)
2167 {
2168 TCPCharDriver *s = chr->opaque;
2169 if (s->fd >= 0) {
2170 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2171 closesocket(s->fd);
2172 }
2173 if (s->listen_fd >= 0) {
2174 qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2175 closesocket(s->listen_fd);
2176 }
2177 qemu_free(s);
2178 qemu_chr_event(chr, CHR_EVENT_CLOSED);
2179 }
2180
2181 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2182 {
2183 CharDriverState *chr = NULL;
2184 TCPCharDriver *s = NULL;
2185 int fd = -1;
2186 int is_listen;
2187 int is_waitconnect;
2188 int do_nodelay;
2189 int is_unix;
2190 int is_telnet;
2191
2192 is_listen = qemu_opt_get_bool(opts, "server", 0);
2193 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2194 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2195 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2196 is_unix = qemu_opt_get(opts, "path") != NULL;
2197 if (!is_listen)
2198 is_waitconnect = 0;
2199
2200 chr = qemu_mallocz(sizeof(CharDriverState));
2201 s = qemu_mallocz(sizeof(TCPCharDriver));
2202
2203 if (is_unix) {
2204 if (is_listen) {
2205 fd = unix_listen_opts(opts);
2206 } else {
2207 fd = unix_connect_opts(opts);
2208 }
2209 } else {
2210 if (is_listen) {
2211 fd = inet_listen_opts(opts, 0);
2212 } else {
2213 fd = inet_connect_opts(opts);
2214 }
2215 }
2216 if (fd < 0)
2217 goto fail;
2218
2219 if (!is_waitconnect)
2220 socket_set_nonblock(fd);
2221
2222 s->connected = 0;
2223 s->fd = -1;
2224 s->listen_fd = -1;
2225 s->msgfd = -1;
2226 s->is_unix = is_unix;
2227 s->do_nodelay = do_nodelay && !is_unix;
2228
2229 chr->opaque = s;
2230 chr->chr_write = tcp_chr_write;
2231 chr->chr_close = tcp_chr_close;
2232 chr->get_msgfd = tcp_get_msgfd;
2233
2234 if (is_listen) {
2235 s->listen_fd = fd;
2236 qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2237 if (is_telnet)
2238 s->do_telnetopt = 1;
2239
2240 } else {
2241 s->connected = 1;
2242 s->fd = fd;
2243 socket_set_nodelay(fd);
2244 tcp_chr_connect(chr);
2245 }
2246
2247 /* for "info chardev" monitor command */
2248 chr->filename = qemu_malloc(256);
2249 if (is_unix) {
2250 snprintf(chr->filename, 256, "unix:%s%s",
2251 qemu_opt_get(opts, "path"),
2252 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2253 } else if (is_telnet) {
2254 snprintf(chr->filename, 256, "telnet:%s:%s%s",
2255 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2256 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2257 } else {
2258 snprintf(chr->filename, 256, "tcp:%s:%s%s",
2259 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2260 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2261 }
2262
2263 if (is_listen && is_waitconnect) {
2264 printf("QEMU waiting for connection on: %s\n",
2265 chr->filename);
2266 tcp_chr_accept(chr);
2267 socket_set_nonblock(s->listen_fd);
2268 }
2269 return chr;
2270
2271 fail:
2272 if (fd >= 0)
2273 closesocket(fd);
2274 qemu_free(s);
2275 qemu_free(chr);
2276 return NULL;
2277 }
2278
2279 /***********************************************************/
2280 /* Memory chardev */
2281 typedef struct {
2282 size_t outbuf_size;
2283 size_t outbuf_capacity;
2284 uint8_t *outbuf;
2285 } MemoryDriver;
2286
2287 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2288 {
2289 MemoryDriver *d = chr->opaque;
2290
2291 /* TODO: the QString implementation has the same code, we should
2292 * introduce a generic way to do this in cutils.c */
2293 if (d->outbuf_capacity < d->outbuf_size + len) {
2294 /* grow outbuf */
2295 d->outbuf_capacity += len;
2296 d->outbuf_capacity *= 2;
2297 d->outbuf = qemu_realloc(d->outbuf, d->outbuf_capacity);
2298 }
2299
2300 memcpy(d->outbuf + d->outbuf_size, buf, len);
2301 d->outbuf_size += len;
2302
2303 return len;
2304 }
2305
2306 void qemu_chr_init_mem(CharDriverState *chr)
2307 {
2308 MemoryDriver *d;
2309
2310 d = qemu_malloc(sizeof(*d));
2311 d->outbuf_size = 0;
2312 d->outbuf_capacity = 4096;
2313 d->outbuf = qemu_mallocz(d->outbuf_capacity);
2314
2315 memset(chr, 0, sizeof(*chr));
2316 chr->opaque = d;
2317 chr->chr_write = mem_chr_write;
2318 }
2319
2320 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2321 {
2322 MemoryDriver *d = chr->opaque;
2323 return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2324 }
2325
2326 /* NOTE: this driver can not be closed with qemu_chr_close()! */
2327 void qemu_chr_close_mem(CharDriverState *chr)
2328 {
2329 MemoryDriver *d = chr->opaque;
2330
2331 qemu_free(d->outbuf);
2332 qemu_free(chr->opaque);
2333 chr->opaque = NULL;
2334 chr->chr_write = NULL;
2335 }
2336
2337 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2338 {
2339 const MemoryDriver *d = chr->opaque;
2340 return d->outbuf_size;
2341 }
2342
2343 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2344 {
2345 char host[65], port[33], width[8], height[8];
2346 int pos;
2347 const char *p;
2348 QemuOpts *opts;
2349
2350 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
2351 if (NULL == opts)
2352 return NULL;
2353
2354 if (strstart(filename, "mon:", &p)) {
2355 filename = p;
2356 qemu_opt_set(opts, "mux", "on");
2357 }
2358
2359 if (strcmp(filename, "null") == 0 ||
2360 strcmp(filename, "pty") == 0 ||
2361 strcmp(filename, "msmouse") == 0 ||
2362 strcmp(filename, "braille") == 0 ||
2363 strcmp(filename, "stdio") == 0) {
2364 qemu_opt_set(opts, "backend", filename);
2365 return opts;
2366 }
2367 if (strstart(filename, "vc", &p)) {
2368 qemu_opt_set(opts, "backend", "vc");
2369 if (*p == ':') {
2370 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2371 /* pixels */
2372 qemu_opt_set(opts, "width", width);
2373 qemu_opt_set(opts, "height", height);
2374 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2375 /* chars */
2376 qemu_opt_set(opts, "cols", width);
2377 qemu_opt_set(opts, "rows", height);
2378 } else {
2379 goto fail;
2380 }
2381 }
2382 return opts;
2383 }
2384 if (strcmp(filename, "con:") == 0) {
2385 qemu_opt_set(opts, "backend", "console");
2386 return opts;
2387 }
2388 if (strstart(filename, "COM", NULL)) {
2389 qemu_opt_set(opts, "backend", "serial");
2390 qemu_opt_set(opts, "path", filename);
2391 return opts;
2392 }
2393 if (strstart(filename, "file:", &p)) {
2394 qemu_opt_set(opts, "backend", "file");
2395 qemu_opt_set(opts, "path", p);
2396 return opts;
2397 }
2398 if (strstart(filename, "pipe:", &p)) {
2399 qemu_opt_set(opts, "backend", "pipe");
2400 qemu_opt_set(opts, "path", p);
2401 return opts;
2402 }
2403 if (strstart(filename, "tcp:", &p) ||
2404 strstart(filename, "telnet:", &p)) {
2405 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2406 host[0] = 0;
2407 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2408 goto fail;
2409 }
2410 qemu_opt_set(opts, "backend", "socket");
2411 qemu_opt_set(opts, "host", host);
2412 qemu_opt_set(opts, "port", port);
2413 if (p[pos] == ',') {
2414 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2415 goto fail;
2416 }
2417 if (strstart(filename, "telnet:", &p))
2418 qemu_opt_set(opts, "telnet", "on");
2419 return opts;
2420 }
2421 if (strstart(filename, "udp:", &p)) {
2422 qemu_opt_set(opts, "backend", "udp");
2423 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2424 host[0] = 0;
2425 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2426 goto fail;
2427 }
2428 }
2429 qemu_opt_set(opts, "host", host);
2430 qemu_opt_set(opts, "port", port);
2431 if (p[pos] == '@') {
2432 p += pos + 1;
2433 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2434 host[0] = 0;
2435 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2436 goto fail;
2437 }
2438 }
2439 qemu_opt_set(opts, "localaddr", host);
2440 qemu_opt_set(opts, "localport", port);
2441 }
2442 return opts;
2443 }
2444 if (strstart(filename, "unix:", &p)) {
2445 qemu_opt_set(opts, "backend", "socket");
2446 if (qemu_opts_do_parse(opts, p, "path") != 0)
2447 goto fail;
2448 return opts;
2449 }
2450 if (strstart(filename, "/dev/parport", NULL) ||
2451 strstart(filename, "/dev/ppi", NULL)) {
2452 qemu_opt_set(opts, "backend", "parport");
2453 qemu_opt_set(opts, "path", filename);
2454 return opts;
2455 }
2456 if (strstart(filename, "/dev/", NULL)) {
2457 qemu_opt_set(opts, "backend", "tty");
2458 qemu_opt_set(opts, "path", filename);
2459 return opts;
2460 }
2461
2462 fail:
2463 qemu_opts_del(opts);
2464 return NULL;
2465 }
2466
2467 static const struct {
2468 const char *name;
2469 CharDriverState *(*open)(QemuOpts *opts);
2470 } backend_table[] = {
2471 { .name = "null", .open = qemu_chr_open_null },
2472 { .name = "socket", .open = qemu_chr_open_socket },
2473 { .name = "udp", .open = qemu_chr_open_udp },
2474 { .name = "msmouse", .open = qemu_chr_open_msmouse },
2475 { .name = "vc", .open = text_console_init },
2476 #ifdef _WIN32
2477 { .name = "file", .open = qemu_chr_open_win_file_out },
2478 { .name = "pipe", .open = qemu_chr_open_win_pipe },
2479 { .name = "console", .open = qemu_chr_open_win_con },
2480 { .name = "serial", .open = qemu_chr_open_win },
2481 #else
2482 { .name = "file", .open = qemu_chr_open_file_out },
2483 { .name = "pipe", .open = qemu_chr_open_pipe },
2484 { .name = "pty", .open = qemu_chr_open_pty },
2485 { .name = "stdio", .open = qemu_chr_open_stdio },
2486 #endif
2487 #ifdef CONFIG_BRLAPI
2488 { .name = "braille", .open = chr_baum_init },
2489 #endif
2490 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2491 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
2492 || defined(__FreeBSD_kernel__)
2493 { .name = "tty", .open = qemu_chr_open_tty },
2494 #endif
2495 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
2496 || defined(__FreeBSD_kernel__)
2497 { .name = "parport", .open = qemu_chr_open_pp },
2498 #endif
2499 #ifdef CONFIG_SPICE
2500 { .name = "spicevmc", .open = qemu_chr_open_spice },
2501 #endif
2502 };
2503
2504 CharDriverState *qemu_chr_open_opts(QemuOpts *opts,
2505 void (*init)(struct CharDriverState *s))
2506 {
2507 CharDriverState *chr;
2508 int i;
2509
2510 if (qemu_opts_id(opts) == NULL) {
2511 fprintf(stderr, "chardev: no id specified\n");
2512 return NULL;
2513 }
2514
2515 if (qemu_opt_get(opts, "backend") == NULL) {
2516 fprintf(stderr, "chardev: \"%s\" missing backend\n",
2517 qemu_opts_id(opts));
2518 return NULL;
2519 }
2520 for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2521 if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2522 break;
2523 }
2524 if (i == ARRAY_SIZE(backend_table)) {
2525 fprintf(stderr, "chardev: backend \"%s\" not found\n",
2526 qemu_opt_get(opts, "backend"));
2527 return NULL;
2528 }
2529
2530 chr = backend_table[i].open(opts);
2531 if (!chr) {
2532 fprintf(stderr, "chardev: opening backend \"%s\" failed\n",
2533 qemu_opt_get(opts, "backend"));
2534 return NULL;
2535 }
2536
2537 if (!chr->filename)
2538 chr->filename = qemu_strdup(qemu_opt_get(opts, "backend"));
2539 chr->init = init;
2540 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2541
2542 if (qemu_opt_get_bool(opts, "mux", 0)) {
2543 CharDriverState *base = chr;
2544 int len = strlen(qemu_opts_id(opts)) + 6;
2545 base->label = qemu_malloc(len);
2546 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
2547 chr = qemu_chr_open_mux(base);
2548 chr->filename = base->filename;
2549 chr->avail_connections = MAX_MUX;
2550 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2551 } else {
2552 chr->avail_connections = 1;
2553 }
2554 chr->label = qemu_strdup(qemu_opts_id(opts));
2555 return chr;
2556 }
2557
2558 CharDriverState *qemu_chr_open(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2559 {
2560 const char *p;
2561 CharDriverState *chr;
2562 QemuOpts *opts;
2563
2564 if (strstart(filename, "chardev:", &p)) {
2565 return qemu_chr_find(p);
2566 }
2567
2568 opts = qemu_chr_parse_compat(label, filename);
2569 if (!opts)
2570 return NULL;
2571
2572 chr = qemu_chr_open_opts(opts, init);
2573 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
2574 monitor_init(chr, MONITOR_USE_READLINE);
2575 }
2576 qemu_opts_del(opts);
2577 return chr;
2578 }
2579
2580 void qemu_chr_set_echo(struct CharDriverState *chr, bool echo)
2581 {
2582 if (chr->chr_set_echo) {
2583 chr->chr_set_echo(chr, echo);
2584 }
2585 }
2586
2587 void qemu_chr_guest_open(struct CharDriverState *chr)
2588 {
2589 if (chr->chr_guest_open) {
2590 chr->chr_guest_open(chr);
2591 }
2592 }
2593
2594 void qemu_chr_guest_close(struct CharDriverState *chr)
2595 {
2596 if (chr->chr_guest_close) {
2597 chr->chr_guest_close(chr);
2598 }
2599 }
2600
2601 void qemu_chr_close(CharDriverState *chr)
2602 {
2603 QTAILQ_REMOVE(&chardevs, chr, next);
2604 if (chr->chr_close)
2605 chr->chr_close(chr);
2606 qemu_free(chr->filename);
2607 qemu_free(chr->label);
2608 qemu_free(chr);
2609 }
2610
2611 static void qemu_chr_qlist_iter(QObject *obj, void *opaque)
2612 {
2613 QDict *chr_dict;
2614 Monitor *mon = opaque;
2615
2616 chr_dict = qobject_to_qdict(obj);
2617 monitor_printf(mon, "%s: filename=%s\n", qdict_get_str(chr_dict, "label"),
2618 qdict_get_str(chr_dict, "filename"));
2619 }
2620
2621 void qemu_chr_info_print(Monitor *mon, const QObject *ret_data)
2622 {
2623 qlist_iter(qobject_to_qlist(ret_data), qemu_chr_qlist_iter, mon);
2624 }
2625
2626 void qemu_chr_info(Monitor *mon, QObject **ret_data)
2627 {
2628 QList *chr_list;
2629 CharDriverState *chr;
2630
2631 chr_list = qlist_new();
2632
2633 QTAILQ_FOREACH(chr, &chardevs, next) {
2634 QObject *obj = qobject_from_jsonf("{ 'label': %s, 'filename': %s }",
2635 chr->label, chr->filename);
2636 qlist_append_obj(chr_list, obj);
2637 }
2638
2639 *ret_data = QOBJECT(chr_list);
2640 }
2641
2642 CharDriverState *qemu_chr_find(const char *name)
2643 {
2644 CharDriverState *chr;
2645
2646 QTAILQ_FOREACH(chr, &chardevs, next) {
2647 if (strcmp(chr->label, name) != 0)
2648 continue;
2649 return chr;
2650 }
2651 return NULL;
2652 }
QEmu