?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
linux-user: Fix unlock_user() call in return from poll()
[qemu.git] / qemu-char.c
blob31c9e79d988fd28bfae4e2dd0a04f843b0e8d790
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 s->chr_can_read = fd_can_read;
201 s->chr_read = fd_read;
202 s->chr_event = fd_event;
203 s->handler_opaque = opaque;
204 if (s->chr_update_read_handler)
205 s->chr_update_read_handler(s);
206
207 /* We're connecting to an already opened device, so let's make sure we
208 also get the open event */
209 if (s->opened) {
210 qemu_chr_generic_open(s);
211 }
212 }
213
214 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
215 {
216 return len;
217 }
218
219 static CharDriverState *qemu_chr_open_null(QemuOpts *opts)
220 {
221 CharDriverState *chr;
222
223 chr = qemu_mallocz(sizeof(CharDriverState));
224 chr->chr_write = null_chr_write;
225 return chr;
226 }
227
228 /* MUX driver for serial I/O splitting */
229 #define MAX_MUX 4
230 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
231 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
232 typedef struct {
233 IOCanReadHandler *chr_can_read[MAX_MUX];
234 IOReadHandler *chr_read[MAX_MUX];
235 IOEventHandler *chr_event[MAX_MUX];
236 void *ext_opaque[MAX_MUX];
237 CharDriverState *drv;
238 int focus;
239 int mux_cnt;
240 int term_got_escape;
241 int max_size;
242 /* Intermediate input buffer allows to catch escape sequences even if the
243 currently active device is not accepting any input - but only until it
244 is full as well. */
245 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
246 int prod[MAX_MUX];
247 int cons[MAX_MUX];
248 int timestamps;
249 int linestart;
250 int64_t timestamps_start;
251 } MuxDriver;
252
253
254 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
255 {
256 MuxDriver *d = chr->opaque;
257 int ret;
258 if (!d->timestamps) {
259 ret = d->drv->chr_write(d->drv, buf, len);
260 } else {
261 int i;
262
263 ret = 0;
264 for (i = 0; i < len; i++) {
265 if (d->linestart) {
266 char buf1[64];
267 int64_t ti;
268 int secs;
269
270 ti = qemu_get_clock_ms(rt_clock);
271 if (d->timestamps_start == -1)
272 d->timestamps_start = ti;
273 ti -= d->timestamps_start;
274 secs = ti / 1000;
275 snprintf(buf1, sizeof(buf1),
276 "[%02d:%02d:%02d.%03d] ",
277 secs / 3600,
278 (secs / 60) % 60,
279 secs % 60,
280 (int)(ti % 1000));
281 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
282 d->linestart = 0;
283 }
284 ret += d->drv->chr_write(d->drv, buf+i, 1);
285 if (buf[i] == '\n') {
286 d->linestart = 1;
287 }
288 }
289 }
290 return ret;
291 }
292
293 static const char * const mux_help[] = {
294 "% h print this help\n\r",
295 "% x exit emulator\n\r",
296 "% s save disk data back to file (if -snapshot)\n\r",
297 "% t toggle console timestamps\n\r"
298 "% b send break (magic sysrq)\n\r",
299 "% c switch between console and monitor\n\r",
300 "% % sends %\n\r",
301 NULL
302 };
303
304 int term_escape_char = 0x01; /* ctrl-a is used for escape */
305 static void mux_print_help(CharDriverState *chr)
306 {
307 int i, j;
308 char ebuf[15] = "Escape-Char";
309 char cbuf[50] = "\n\r";
310
311 if (term_escape_char > 0 && term_escape_char < 26) {
312 snprintf(cbuf, sizeof(cbuf), "\n\r");
313 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
314 } else {
315 snprintf(cbuf, sizeof(cbuf),
316 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
317 term_escape_char);
318 }
319 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
320 for (i = 0; mux_help[i] != NULL; i++) {
321 for (j=0; mux_help[i][j] != '\0'; j++) {
322 if (mux_help[i][j] == '%')
323 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
324 else
325 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
326 }
327 }
328 }
329
330 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
331 {
332 if (d->chr_event[mux_nr])
333 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
334 }
335
336 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
337 {
338 if (d->term_got_escape) {
339 d->term_got_escape = 0;
340 if (ch == term_escape_char)
341 goto send_char;
342 switch(ch) {
343 case '?':
344 case 'h':
345 mux_print_help(chr);
346 break;
347 case 'x':
348 {
349 const char *term = "QEMU: Terminated\n\r";
350 chr->chr_write(chr,(uint8_t *)term,strlen(term));
351 exit(0);
352 break;
353 }
354 case 's':
355 bdrv_commit_all();
356 break;
357 case 'b':
358 qemu_chr_event(chr, CHR_EVENT_BREAK);
359 break;
360 case 'c':
361 /* Switch to the next registered device */
362 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
363 d->focus++;
364 if (d->focus >= d->mux_cnt)
365 d->focus = 0;
366 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
367 break;
368 case 't':
369 d->timestamps = !d->timestamps;
370 d->timestamps_start = -1;
371 d->linestart = 0;
372 break;
373 }
374 } else if (ch == term_escape_char) {
375 d->term_got_escape = 1;
376 } else {
377 send_char:
378 return 1;
379 }
380 return 0;
381 }
382
383 static void mux_chr_accept_input(CharDriverState *chr)
384 {
385 MuxDriver *d = chr->opaque;
386 int m = d->focus;
387
388 while (d->prod[m] != d->cons[m] &&
389 d->chr_can_read[m] &&
390 d->chr_can_read[m](d->ext_opaque[m])) {
391 d->chr_read[m](d->ext_opaque[m],
392 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
393 }
394 }
395
396 static int mux_chr_can_read(void *opaque)
397 {
398 CharDriverState *chr = opaque;
399 MuxDriver *d = chr->opaque;
400 int m = d->focus;
401
402 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
403 return 1;
404 if (d->chr_can_read[m])
405 return d->chr_can_read[m](d->ext_opaque[m]);
406 return 0;
407 }
408
409 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
410 {
411 CharDriverState *chr = opaque;
412 MuxDriver *d = chr->opaque;
413 int m = d->focus;
414 int i;
415
416 mux_chr_accept_input (opaque);
417
418 for(i = 0; i < size; i++)
419 if (mux_proc_byte(chr, d, buf[i])) {
420 if (d->prod[m] == d->cons[m] &&
421 d->chr_can_read[m] &&
422 d->chr_can_read[m](d->ext_opaque[m]))
423 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
424 else
425 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
426 }
427 }
428
429 static void mux_chr_event(void *opaque, int event)
430 {
431 CharDriverState *chr = opaque;
432 MuxDriver *d = chr->opaque;
433 int i;
434
435 /* Send the event to all registered listeners */
436 for (i = 0; i < d->mux_cnt; i++)
437 mux_chr_send_event(d, i, event);
438 }
439
440 static void mux_chr_update_read_handler(CharDriverState *chr)
441 {
442 MuxDriver *d = chr->opaque;
443
444 if (d->mux_cnt >= MAX_MUX) {
445 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
446 return;
447 }
448 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
449 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
450 d->chr_read[d->mux_cnt] = chr->chr_read;
451 d->chr_event[d->mux_cnt] = chr->chr_event;
452 /* Fix up the real driver with mux routines */
453 if (d->mux_cnt == 0) {
454 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
455 mux_chr_event, chr);
456 }
457 if (d->focus != -1) {
458 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
459 }
460 d->focus = d->mux_cnt;
461 d->mux_cnt++;
462 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
463 }
464
465 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
466 {
467 CharDriverState *chr;
468 MuxDriver *d;
469
470 chr = qemu_mallocz(sizeof(CharDriverState));
471 d = qemu_mallocz(sizeof(MuxDriver));
472
473 chr->opaque = d;
474 d->drv = drv;
475 d->focus = -1;
476 chr->chr_write = mux_chr_write;
477 chr->chr_update_read_handler = mux_chr_update_read_handler;
478 chr->chr_accept_input = mux_chr_accept_input;
479
480 /* Muxes are always open on creation */
481 qemu_chr_generic_open(chr);
482
483 return chr;
484 }
485
486
487 #ifdef _WIN32
488 int send_all(int fd, const void *buf, int len1)
489 {
490 int ret, len;
491
492 len = len1;
493 while (len > 0) {
494 ret = send(fd, buf, len, 0);
495 if (ret < 0) {
496 errno = WSAGetLastError();
497 if (errno != WSAEWOULDBLOCK) {
498 return -1;
499 }
500 } else if (ret == 0) {
501 break;
502 } else {
503 buf += ret;
504 len -= ret;
505 }
506 }
507 return len1 - len;
508 }
509
510 #else
511
512 int send_all(int fd, const void *_buf, int len1)
513 {
514 int ret, len;
515 const uint8_t *buf = _buf;
516
517 len = len1;
518 while (len > 0) {
519 ret = write(fd, buf, len);
520 if (ret < 0) {
521 if (errno != EINTR && errno != EAGAIN)
522 return -1;
523 } else if (ret == 0) {
524 break;
525 } else {
526 buf += ret;
527 len -= ret;
528 }
529 }
530 return len1 - len;
531 }
532 #endif /* !_WIN32 */
533
534 #ifndef _WIN32
535
536 typedef struct {
537 int fd_in, fd_out;
538 int max_size;
539 } FDCharDriver;
540
541 #define STDIO_MAX_CLIENTS 1
542 static int stdio_nb_clients = 0;
543
544 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
545 {
546 FDCharDriver *s = chr->opaque;
547 return send_all(s->fd_out, buf, len);
548 }
549
550 static int fd_chr_read_poll(void *opaque)
551 {
552 CharDriverState *chr = opaque;
553 FDCharDriver *s = chr->opaque;
554
555 s->max_size = qemu_chr_can_read(chr);
556 return s->max_size;
557 }
558
559 static void fd_chr_read(void *opaque)
560 {
561 CharDriverState *chr = opaque;
562 FDCharDriver *s = chr->opaque;
563 int size, len;
564 uint8_t buf[READ_BUF_LEN];
565
566 len = sizeof(buf);
567 if (len > s->max_size)
568 len = s->max_size;
569 if (len == 0)
570 return;
571 size = read(s->fd_in, buf, len);
572 if (size == 0) {
573 /* FD has been closed. Remove it from the active list. */
574 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
575 qemu_chr_event(chr, CHR_EVENT_CLOSED);
576 return;
577 }
578 if (size > 0) {
579 qemu_chr_read(chr, buf, size);
580 }
581 }
582
583 static void fd_chr_update_read_handler(CharDriverState *chr)
584 {
585 FDCharDriver *s = chr->opaque;
586
587 if (s->fd_in >= 0) {
588 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
589 } else {
590 qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
591 fd_chr_read, NULL, chr);
592 }
593 }
594 }
595
596 static void fd_chr_close(struct CharDriverState *chr)
597 {
598 FDCharDriver *s = chr->opaque;
599
600 if (s->fd_in >= 0) {
601 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
602 } else {
603 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
604 }
605 }
606
607 qemu_free(s);
608 qemu_chr_event(chr, CHR_EVENT_CLOSED);
609 }
610
611 /* open a character device to a unix fd */
612 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
613 {
614 CharDriverState *chr;
615 FDCharDriver *s;
616
617 chr = qemu_mallocz(sizeof(CharDriverState));
618 s = qemu_mallocz(sizeof(FDCharDriver));
619 s->fd_in = fd_in;
620 s->fd_out = fd_out;
621 chr->opaque = s;
622 chr->chr_write = fd_chr_write;
623 chr->chr_update_read_handler = fd_chr_update_read_handler;
624 chr->chr_close = fd_chr_close;
625
626 qemu_chr_generic_open(chr);
627
628 return chr;
629 }
630
631 static CharDriverState *qemu_chr_open_file_out(QemuOpts *opts)
632 {
633 int fd_out;
634
635 TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
636 O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
637 if (fd_out < 0)
638 return NULL;
639 return qemu_chr_open_fd(-1, fd_out);
640 }
641
642 static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts)
643 {
644 int fd_in, fd_out;
645 char filename_in[256], filename_out[256];
646 const char *filename = qemu_opt_get(opts, "path");
647
648 if (filename == NULL) {
649 fprintf(stderr, "chardev: pipe: no filename given\n");
650 return NULL;
651 }
652
653 snprintf(filename_in, 256, "%s.in", filename);
654 snprintf(filename_out, 256, "%s.out", filename);
655 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
656 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
657 if (fd_in < 0 || fd_out < 0) {
658 if (fd_in >= 0)
659 close(fd_in);
660 if (fd_out >= 0)
661 close(fd_out);
662 TFR(fd_in = fd_out = open(filename, O_RDWR | O_BINARY));
663 if (fd_in < 0)
664 return NULL;
665 }
666 return qemu_chr_open_fd(fd_in, fd_out);
667 }
668
669
670 /* for STDIO, we handle the case where several clients use it
671 (nographic mode) */
672
673 #define TERM_FIFO_MAX_SIZE 1
674
675 static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
676 static int term_fifo_size;
677
678 static int stdio_read_poll(void *opaque)
679 {
680 CharDriverState *chr = opaque;
681
682 /* try to flush the queue if needed */
683 if (term_fifo_size != 0 && qemu_chr_can_read(chr) > 0) {
684 qemu_chr_read(chr, term_fifo, 1);
685 term_fifo_size = 0;
686 }
687 /* see if we can absorb more chars */
688 if (term_fifo_size == 0)
689 return 1;
690 else
691 return 0;
692 }
693
694 static void stdio_read(void *opaque)
695 {
696 int size;
697 uint8_t buf[1];
698 CharDriverState *chr = opaque;
699
700 size = read(0, buf, 1);
701 if (size == 0) {
702 /* stdin has been closed. Remove it from the active list. */
703 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
704 qemu_chr_event(chr, CHR_EVENT_CLOSED);
705 return;
706 }
707 if (size > 0) {
708 if (qemu_chr_can_read(chr) > 0) {
709 qemu_chr_read(chr, buf, 1);
710 } else if (term_fifo_size == 0) {
711 term_fifo[term_fifo_size++] = buf[0];
712 }
713 }
714 }
715
716 /* init terminal so that we can grab keys */
717 static struct termios oldtty;
718 static int old_fd0_flags;
719 static bool stdio_allow_signal;
720
721 static void term_exit(void)
722 {
723 tcsetattr (0, TCSANOW, &oldtty);
724 fcntl(0, F_SETFL, old_fd0_flags);
725 }
726
727 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
728 {
729 struct termios tty;
730
731 tty = oldtty;
732 if (!echo) {
733 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
734 |INLCR|IGNCR|ICRNL|IXON);
735 tty.c_oflag |= OPOST;
736 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
737 tty.c_cflag &= ~(CSIZE|PARENB);
738 tty.c_cflag |= CS8;
739 tty.c_cc[VMIN] = 1;
740 tty.c_cc[VTIME] = 0;
741 }
742 /* if graphical mode, we allow Ctrl-C handling */
743 if (!stdio_allow_signal)
744 tty.c_lflag &= ~ISIG;
745
746 tcsetattr (0, TCSANOW, &tty);
747 }
748
749 static void qemu_chr_close_stdio(struct CharDriverState *chr)
750 {
751 term_exit();
752 stdio_nb_clients--;
753 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
754 fd_chr_close(chr);
755 }
756
757 static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts)
758 {
759 CharDriverState *chr;
760
761 if (stdio_nb_clients >= STDIO_MAX_CLIENTS)
762 return NULL;
763 if (stdio_nb_clients == 0) {
764 old_fd0_flags = fcntl(0, F_GETFL);
765 tcgetattr (0, &oldtty);
766 fcntl(0, F_SETFL, O_NONBLOCK);
767 atexit(term_exit);
768 }
769
770 chr = qemu_chr_open_fd(0, 1);
771 chr->chr_close = qemu_chr_close_stdio;
772 chr->chr_set_echo = qemu_chr_set_echo_stdio;
773 qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
774 stdio_nb_clients++;
775 stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
776 display_type != DT_NOGRAPHIC);
777 qemu_chr_set_echo(chr, false);
778
779 return chr;
780 }
781
782 #ifdef __sun__
783 /* Once Solaris has openpty(), this is going to be removed. */
784 static int openpty(int *amaster, int *aslave, char *name,
785 struct termios *termp, struct winsize *winp)
786 {
787 const char *slave;
788 int mfd = -1, sfd = -1;
789
790 *amaster = *aslave = -1;
791
792 mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
793 if (mfd < 0)
794 goto err;
795
796 if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
797 goto err;
798
799 if ((slave = ptsname(mfd)) == NULL)
800 goto err;
801
802 if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
803 goto err;
804
805 if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
806 (termp != NULL && tcgetattr(sfd, termp) < 0))
807 goto err;
808
809 if (amaster)
810 *amaster = mfd;
811 if (aslave)
812 *aslave = sfd;
813 if (winp)
814 ioctl(sfd, TIOCSWINSZ, winp);
815
816 return 0;
817
818 err:
819 if (sfd != -1)
820 close(sfd);
821 close(mfd);
822 return -1;
823 }
824
825 static void cfmakeraw (struct termios *termios_p)
826 {
827 termios_p->c_iflag &=
828 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
829 termios_p->c_oflag &= ~OPOST;
830 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
831 termios_p->c_cflag &= ~(CSIZE|PARENB);
832 termios_p->c_cflag |= CS8;
833
834 termios_p->c_cc[VMIN] = 0;
835 termios_p->c_cc[VTIME] = 0;
836 }
837 #endif
838
839 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
840 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
841 || defined(__GLIBC__)
842
843 typedef struct {
844 int fd;
845 int connected;
846 int polling;
847 int read_bytes;
848 QEMUTimer *timer;
849 } PtyCharDriver;
850
851 static void pty_chr_update_read_handler(CharDriverState *chr);
852 static void pty_chr_state(CharDriverState *chr, int connected);
853
854 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
855 {
856 PtyCharDriver *s = chr->opaque;
857
858 if (!s->connected) {
859 /* guest sends data, check for (re-)connect */
860 pty_chr_update_read_handler(chr);
861 return 0;
862 }
863 return send_all(s->fd, buf, len);
864 }
865
866 static int pty_chr_read_poll(void *opaque)
867 {
868 CharDriverState *chr = opaque;
869 PtyCharDriver *s = chr->opaque;
870
871 s->read_bytes = qemu_chr_can_read(chr);
872 return s->read_bytes;
873 }
874
875 static void pty_chr_read(void *opaque)
876 {
877 CharDriverState *chr = opaque;
878 PtyCharDriver *s = chr->opaque;
879 int size, len;
880 uint8_t buf[READ_BUF_LEN];
881
882 len = sizeof(buf);
883 if (len > s->read_bytes)
884 len = s->read_bytes;
885 if (len == 0)
886 return;
887 size = read(s->fd, buf, len);
888 if ((size == -1 && errno == EIO) ||
889 (size == 0)) {
890 pty_chr_state(chr, 0);
891 return;
892 }
893 if (size > 0) {
894 pty_chr_state(chr, 1);
895 qemu_chr_read(chr, buf, size);
896 }
897 }
898
899 static void pty_chr_update_read_handler(CharDriverState *chr)
900 {
901 PtyCharDriver *s = chr->opaque;
902
903 qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
904 pty_chr_read, NULL, chr);
905 s->polling = 1;
906 /*
907 * Short timeout here: just need wait long enougth that qemu makes
908 * it through the poll loop once. When reconnected we want a
909 * short timeout so we notice it almost instantly. Otherwise
910 * read() gives us -EIO instantly, making pty_chr_state() reset the
911 * timeout to the normal (much longer) poll interval before the
912 * timer triggers.
913 */
914 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 10);
915 }
916
917 static void pty_chr_state(CharDriverState *chr, int connected)
918 {
919 PtyCharDriver *s = chr->opaque;
920
921 if (!connected) {
922 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
923 s->connected = 0;
924 s->polling = 0;
925 /* (re-)connect poll interval for idle guests: once per second.
926 * We check more frequently in case the guests sends data to
927 * the virtual device linked to our pty. */
928 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 1000);
929 } else {
930 if (!s->connected)
931 qemu_chr_generic_open(chr);
932 s->connected = 1;
933 }
934 }
935
936 static void pty_chr_timer(void *opaque)
937 {
938 struct CharDriverState *chr = opaque;
939 PtyCharDriver *s = chr->opaque;
940
941 if (s->connected)
942 return;
943 if (s->polling) {
944 /* If we arrive here without polling being cleared due
945 * read returning -EIO, then we are (re-)connected */
946 pty_chr_state(chr, 1);
947 return;
948 }
949
950 /* Next poll ... */
951 pty_chr_update_read_handler(chr);
952 }
953
954 static void pty_chr_close(struct CharDriverState *chr)
955 {
956 PtyCharDriver *s = chr->opaque;
957
958 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
959 close(s->fd);
960 qemu_del_timer(s->timer);
961 qemu_free_timer(s->timer);
962 qemu_free(s);
963 qemu_chr_event(chr, CHR_EVENT_CLOSED);
964 }
965
966 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
967 {
968 CharDriverState *chr;
969 PtyCharDriver *s;
970 struct termios tty;
971 int slave_fd, len;
972 #if defined(__OpenBSD__) || defined(__DragonFly__)
973 char pty_name[PATH_MAX];
974 #define q_ptsname(x) pty_name
975 #else
976 char *pty_name = NULL;
977 #define q_ptsname(x) ptsname(x)
978 #endif
979
980 chr = qemu_mallocz(sizeof(CharDriverState));
981 s = qemu_mallocz(sizeof(PtyCharDriver));
982
983 if (openpty(&s->fd, &slave_fd, pty_name, NULL, NULL) < 0) {
984 return NULL;
985 }
986
987 /* Set raw attributes on the pty. */
988 tcgetattr(slave_fd, &tty);
989 cfmakeraw(&tty);
990 tcsetattr(slave_fd, TCSAFLUSH, &tty);
991 close(slave_fd);
992
993 len = strlen(q_ptsname(s->fd)) + 5;
994 chr->filename = qemu_malloc(len);
995 snprintf(chr->filename, len, "pty:%s", q_ptsname(s->fd));
996 qemu_opt_set(opts, "path", q_ptsname(s->fd));
997 fprintf(stderr, "char device redirected to %s\n", q_ptsname(s->fd));
998
999 chr->opaque = s;
1000 chr->chr_write = pty_chr_write;
1001 chr->chr_update_read_handler = pty_chr_update_read_handler;
1002 chr->chr_close = pty_chr_close;
1003
1004 s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr);
1005
1006 return chr;
1007 }
1008
1009 static void tty_serial_init(int fd, int speed,
1010 int parity, int data_bits, int stop_bits)
1011 {
1012 struct termios tty;
1013 speed_t spd;
1014
1015 #if 0
1016 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1017 speed, parity, data_bits, stop_bits);
1018 #endif
1019 tcgetattr (fd, &tty);
1020
1021 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1022 speed = speed * 10 / 11;
1023 do {
1024 check_speed(50);
1025 check_speed(75);
1026 check_speed(110);
1027 check_speed(134);
1028 check_speed(150);
1029 check_speed(200);
1030 check_speed(300);
1031 check_speed(600);
1032 check_speed(1200);
1033 check_speed(1800);
1034 check_speed(2400);
1035 check_speed(4800);
1036 check_speed(9600);
1037 check_speed(19200);
1038 check_speed(38400);
1039 /* Non-Posix values follow. They may be unsupported on some systems. */
1040 check_speed(57600);
1041 check_speed(115200);
1042 #ifdef B230400
1043 check_speed(230400);
1044 #endif
1045 #ifdef B460800
1046 check_speed(460800);
1047 #endif
1048 #ifdef B500000
1049 check_speed(500000);
1050 #endif
1051 #ifdef B576000
1052 check_speed(576000);
1053 #endif
1054 #ifdef B921600
1055 check_speed(921600);
1056 #endif
1057 #ifdef B1000000
1058 check_speed(1000000);
1059 #endif
1060 #ifdef B1152000
1061 check_speed(1152000);
1062 #endif
1063 #ifdef B1500000
1064 check_speed(1500000);
1065 #endif
1066 #ifdef B2000000
1067 check_speed(2000000);
1068 #endif
1069 #ifdef B2500000
1070 check_speed(2500000);
1071 #endif
1072 #ifdef B3000000
1073 check_speed(3000000);
1074 #endif
1075 #ifdef B3500000
1076 check_speed(3500000);
1077 #endif
1078 #ifdef B4000000
1079 check_speed(4000000);
1080 #endif
1081 spd = B115200;
1082 } while (0);
1083
1084 cfsetispeed(&tty, spd);
1085 cfsetospeed(&tty, spd);
1086
1087 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1088 |INLCR|IGNCR|ICRNL|IXON);
1089 tty.c_oflag |= OPOST;
1090 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1091 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1092 switch(data_bits) {
1093 default:
1094 case 8:
1095 tty.c_cflag |= CS8;
1096 break;
1097 case 7:
1098 tty.c_cflag |= CS7;
1099 break;
1100 case 6:
1101 tty.c_cflag |= CS6;
1102 break;
1103 case 5:
1104 tty.c_cflag |= CS5;
1105 break;
1106 }
1107 switch(parity) {
1108 default:
1109 case 'N':
1110 break;
1111 case 'E':
1112 tty.c_cflag |= PARENB;
1113 break;
1114 case 'O':
1115 tty.c_cflag |= PARENB | PARODD;
1116 break;
1117 }
1118 if (stop_bits == 2)
1119 tty.c_cflag |= CSTOPB;
1120
1121 tcsetattr (fd, TCSANOW, &tty);
1122 }
1123
1124 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1125 {
1126 FDCharDriver *s = chr->opaque;
1127
1128 switch(cmd) {
1129 case CHR_IOCTL_SERIAL_SET_PARAMS:
1130 {
1131 QEMUSerialSetParams *ssp = arg;
1132 tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1133 ssp->data_bits, ssp->stop_bits);
1134 }
1135 break;
1136 case CHR_IOCTL_SERIAL_SET_BREAK:
1137 {
1138 int enable = *(int *)arg;
1139 if (enable)
1140 tcsendbreak(s->fd_in, 1);
1141 }
1142 break;
1143 case CHR_IOCTL_SERIAL_GET_TIOCM:
1144 {
1145 int sarg = 0;
1146 int *targ = (int *)arg;
1147 ioctl(s->fd_in, TIOCMGET, &sarg);
1148 *targ = 0;
1149 if (sarg & TIOCM_CTS)
1150 *targ |= CHR_TIOCM_CTS;
1151 if (sarg & TIOCM_CAR)
1152 *targ |= CHR_TIOCM_CAR;
1153 if (sarg & TIOCM_DSR)
1154 *targ |= CHR_TIOCM_DSR;
1155 if (sarg & TIOCM_RI)
1156 *targ |= CHR_TIOCM_RI;
1157 if (sarg & TIOCM_DTR)
1158 *targ |= CHR_TIOCM_DTR;
1159 if (sarg & TIOCM_RTS)
1160 *targ |= CHR_TIOCM_RTS;
1161 }
1162 break;
1163 case CHR_IOCTL_SERIAL_SET_TIOCM:
1164 {
1165 int sarg = *(int *)arg;
1166 int targ = 0;
1167 ioctl(s->fd_in, TIOCMGET, &targ);
1168 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1169 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1170 if (sarg & CHR_TIOCM_CTS)
1171 targ |= TIOCM_CTS;
1172 if (sarg & CHR_TIOCM_CAR)
1173 targ |= TIOCM_CAR;
1174 if (sarg & CHR_TIOCM_DSR)
1175 targ |= TIOCM_DSR;
1176 if (sarg & CHR_TIOCM_RI)
1177 targ |= TIOCM_RI;
1178 if (sarg & CHR_TIOCM_DTR)
1179 targ |= TIOCM_DTR;
1180 if (sarg & CHR_TIOCM_RTS)
1181 targ |= TIOCM_RTS;
1182 ioctl(s->fd_in, TIOCMSET, &targ);
1183 }
1184 break;
1185 default:
1186 return -ENOTSUP;
1187 }
1188 return 0;
1189 }
1190
1191 static void qemu_chr_close_tty(CharDriverState *chr)
1192 {
1193 FDCharDriver *s = chr->opaque;
1194 int fd = -1;
1195
1196 if (s) {
1197 fd = s->fd_in;
1198 }
1199
1200 fd_chr_close(chr);
1201
1202 if (fd >= 0) {
1203 close(fd);
1204 }
1205 }
1206
1207 static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
1208 {
1209 const char *filename = qemu_opt_get(opts, "path");
1210 CharDriverState *chr;
1211 int fd;
1212
1213 TFR(fd = open(filename, O_RDWR | O_NONBLOCK));
1214 if (fd < 0) {
1215 return NULL;
1216 }
1217 tty_serial_init(fd, 115200, 'N', 8, 1);
1218 chr = qemu_chr_open_fd(fd, fd);
1219 if (!chr) {
1220 close(fd);
1221 return NULL;
1222 }
1223 chr->chr_ioctl = tty_serial_ioctl;
1224 chr->chr_close = qemu_chr_close_tty;
1225 return chr;
1226 }
1227 #else /* ! __linux__ && ! __sun__ */
1228 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
1229 {
1230 return NULL;
1231 }
1232 #endif /* __linux__ || __sun__ */
1233
1234 #if defined(__linux__)
1235 typedef struct {
1236 int fd;
1237 int mode;
1238 } ParallelCharDriver;
1239
1240 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1241 {
1242 if (s->mode != mode) {
1243 int m = mode;
1244 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1245 return 0;
1246 s->mode = mode;
1247 }
1248 return 1;
1249 }
1250
1251 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1252 {
1253 ParallelCharDriver *drv = chr->opaque;
1254 int fd = drv->fd;
1255 uint8_t b;
1256
1257 switch(cmd) {
1258 case CHR_IOCTL_PP_READ_DATA:
1259 if (ioctl(fd, PPRDATA, &b) < 0)
1260 return -ENOTSUP;
1261 *(uint8_t *)arg = b;
1262 break;
1263 case CHR_IOCTL_PP_WRITE_DATA:
1264 b = *(uint8_t *)arg;
1265 if (ioctl(fd, PPWDATA, &b) < 0)
1266 return -ENOTSUP;
1267 break;
1268 case CHR_IOCTL_PP_READ_CONTROL:
1269 if (ioctl(fd, PPRCONTROL, &b) < 0)
1270 return -ENOTSUP;
1271 /* Linux gives only the lowest bits, and no way to know data
1272 direction! For better compatibility set the fixed upper
1273 bits. */
1274 *(uint8_t *)arg = b | 0xc0;
1275 break;
1276 case CHR_IOCTL_PP_WRITE_CONTROL:
1277 b = *(uint8_t *)arg;
1278 if (ioctl(fd, PPWCONTROL, &b) < 0)
1279 return -ENOTSUP;
1280 break;
1281 case CHR_IOCTL_PP_READ_STATUS:
1282 if (ioctl(fd, PPRSTATUS, &b) < 0)
1283 return -ENOTSUP;
1284 *(uint8_t *)arg = b;
1285 break;
1286 case CHR_IOCTL_PP_DATA_DIR:
1287 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1288 return -ENOTSUP;
1289 break;
1290 case CHR_IOCTL_PP_EPP_READ_ADDR:
1291 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1292 struct ParallelIOArg *parg = arg;
1293 int n = read(fd, parg->buffer, parg->count);
1294 if (n != parg->count) {
1295 return -EIO;
1296 }
1297 }
1298 break;
1299 case CHR_IOCTL_PP_EPP_READ:
1300 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1301 struct ParallelIOArg *parg = arg;
1302 int n = read(fd, parg->buffer, parg->count);
1303 if (n != parg->count) {
1304 return -EIO;
1305 }
1306 }
1307 break;
1308 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1309 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1310 struct ParallelIOArg *parg = arg;
1311 int n = write(fd, parg->buffer, parg->count);
1312 if (n != parg->count) {
1313 return -EIO;
1314 }
1315 }
1316 break;
1317 case CHR_IOCTL_PP_EPP_WRITE:
1318 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1319 struct ParallelIOArg *parg = arg;
1320 int n = write(fd, parg->buffer, parg->count);
1321 if (n != parg->count) {
1322 return -EIO;
1323 }
1324 }
1325 break;
1326 default:
1327 return -ENOTSUP;
1328 }
1329 return 0;
1330 }
1331
1332 static void pp_close(CharDriverState *chr)
1333 {
1334 ParallelCharDriver *drv = chr->opaque;
1335 int fd = drv->fd;
1336
1337 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1338 ioctl(fd, PPRELEASE);
1339 close(fd);
1340 qemu_free(drv);
1341 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1342 }
1343
1344 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1345 {
1346 const char *filename = qemu_opt_get(opts, "path");
1347 CharDriverState *chr;
1348 ParallelCharDriver *drv;
1349 int fd;
1350
1351 TFR(fd = open(filename, O_RDWR));
1352 if (fd < 0)
1353 return NULL;
1354
1355 if (ioctl(fd, PPCLAIM) < 0) {
1356 close(fd);
1357 return NULL;
1358 }
1359
1360 drv = qemu_mallocz(sizeof(ParallelCharDriver));
1361 drv->fd = fd;
1362 drv->mode = IEEE1284_MODE_COMPAT;
1363
1364 chr = qemu_mallocz(sizeof(CharDriverState));
1365 chr->chr_write = null_chr_write;
1366 chr->chr_ioctl = pp_ioctl;
1367 chr->chr_close = pp_close;
1368 chr->opaque = drv;
1369
1370 qemu_chr_generic_open(chr);
1371
1372 return chr;
1373 }
1374 #endif /* __linux__ */
1375
1376 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1377 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1378 {
1379 int fd = (int)(intptr_t)chr->opaque;
1380 uint8_t b;
1381
1382 switch(cmd) {
1383 case CHR_IOCTL_PP_READ_DATA:
1384 if (ioctl(fd, PPIGDATA, &b) < 0)
1385 return -ENOTSUP;
1386 *(uint8_t *)arg = b;
1387 break;
1388 case CHR_IOCTL_PP_WRITE_DATA:
1389 b = *(uint8_t *)arg;
1390 if (ioctl(fd, PPISDATA, &b) < 0)
1391 return -ENOTSUP;
1392 break;
1393 case CHR_IOCTL_PP_READ_CONTROL:
1394 if (ioctl(fd, PPIGCTRL, &b) < 0)
1395 return -ENOTSUP;
1396 *(uint8_t *)arg = b;
1397 break;
1398 case CHR_IOCTL_PP_WRITE_CONTROL:
1399 b = *(uint8_t *)arg;
1400 if (ioctl(fd, PPISCTRL, &b) < 0)
1401 return -ENOTSUP;
1402 break;
1403 case CHR_IOCTL_PP_READ_STATUS:
1404 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1405 return -ENOTSUP;
1406 *(uint8_t *)arg = b;
1407 break;
1408 default:
1409 return -ENOTSUP;
1410 }
1411 return 0;
1412 }
1413
1414 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1415 {
1416 const char *filename = qemu_opt_get(opts, "path");
1417 CharDriverState *chr;
1418 int fd;
1419
1420 fd = open(filename, O_RDWR);
1421 if (fd < 0)
1422 return NULL;
1423
1424 chr = qemu_mallocz(sizeof(CharDriverState));
1425 chr->opaque = (void *)(intptr_t)fd;
1426 chr->chr_write = null_chr_write;
1427 chr->chr_ioctl = pp_ioctl;
1428 return chr;
1429 }
1430 #endif
1431
1432 #else /* _WIN32 */
1433
1434 typedef struct {
1435 int max_size;
1436 HANDLE hcom, hrecv, hsend;
1437 OVERLAPPED orecv, osend;
1438 BOOL fpipe;
1439 DWORD len;
1440 } WinCharState;
1441
1442 #define NSENDBUF 2048
1443 #define NRECVBUF 2048
1444 #define MAXCONNECT 1
1445 #define NTIMEOUT 5000
1446
1447 static int win_chr_poll(void *opaque);
1448 static int win_chr_pipe_poll(void *opaque);
1449
1450 static void win_chr_close(CharDriverState *chr)
1451 {
1452 WinCharState *s = chr->opaque;
1453
1454 if (s->hsend) {
1455 CloseHandle(s->hsend);
1456 s->hsend = NULL;
1457 }
1458 if (s->hrecv) {
1459 CloseHandle(s->hrecv);
1460 s->hrecv = NULL;
1461 }
1462 if (s->hcom) {
1463 CloseHandle(s->hcom);
1464 s->hcom = NULL;
1465 }
1466 if (s->fpipe)
1467 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1468 else
1469 qemu_del_polling_cb(win_chr_poll, chr);
1470
1471 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1472 }
1473
1474 static int win_chr_init(CharDriverState *chr, const char *filename)
1475 {
1476 WinCharState *s = chr->opaque;
1477 COMMCONFIG comcfg;
1478 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1479 COMSTAT comstat;
1480 DWORD size;
1481 DWORD err;
1482
1483 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1484 if (!s->hsend) {
1485 fprintf(stderr, "Failed CreateEvent\n");
1486 goto fail;
1487 }
1488 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1489 if (!s->hrecv) {
1490 fprintf(stderr, "Failed CreateEvent\n");
1491 goto fail;
1492 }
1493
1494 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1495 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1496 if (s->hcom == INVALID_HANDLE_VALUE) {
1497 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1498 s->hcom = NULL;
1499 goto fail;
1500 }
1501
1502 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1503 fprintf(stderr, "Failed SetupComm\n");
1504 goto fail;
1505 }
1506
1507 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1508 size = sizeof(COMMCONFIG);
1509 GetDefaultCommConfig(filename, &comcfg, &size);
1510 comcfg.dcb.DCBlength = sizeof(DCB);
1511 CommConfigDialog(filename, NULL, &comcfg);
1512
1513 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1514 fprintf(stderr, "Failed SetCommState\n");
1515 goto fail;
1516 }
1517
1518 if (!SetCommMask(s->hcom, EV_ERR)) {
1519 fprintf(stderr, "Failed SetCommMask\n");
1520 goto fail;
1521 }
1522
1523 cto.ReadIntervalTimeout = MAXDWORD;
1524 if (!SetCommTimeouts(s->hcom, &cto)) {
1525 fprintf(stderr, "Failed SetCommTimeouts\n");
1526 goto fail;
1527 }
1528
1529 if (!ClearCommError(s->hcom, &err, &comstat)) {
1530 fprintf(stderr, "Failed ClearCommError\n");
1531 goto fail;
1532 }
1533 qemu_add_polling_cb(win_chr_poll, chr);
1534 return 0;
1535
1536 fail:
1537 win_chr_close(chr);
1538 return -1;
1539 }
1540
1541 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1542 {
1543 WinCharState *s = chr->opaque;
1544 DWORD len, ret, size, err;
1545
1546 len = len1;
1547 ZeroMemory(&s->osend, sizeof(s->osend));
1548 s->osend.hEvent = s->hsend;
1549 while (len > 0) {
1550 if (s->hsend)
1551 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1552 else
1553 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1554 if (!ret) {
1555 err = GetLastError();
1556 if (err == ERROR_IO_PENDING) {
1557 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1558 if (ret) {
1559 buf += size;
1560 len -= size;
1561 } else {
1562 break;
1563 }
1564 } else {
1565 break;
1566 }
1567 } else {
1568 buf += size;
1569 len -= size;
1570 }
1571 }
1572 return len1 - len;
1573 }
1574
1575 static int win_chr_read_poll(CharDriverState *chr)
1576 {
1577 WinCharState *s = chr->opaque;
1578
1579 s->max_size = qemu_chr_can_read(chr);
1580 return s->max_size;
1581 }
1582
1583 static void win_chr_readfile(CharDriverState *chr)
1584 {
1585 WinCharState *s = chr->opaque;
1586 int ret, err;
1587 uint8_t buf[READ_BUF_LEN];
1588 DWORD size;
1589
1590 ZeroMemory(&s->orecv, sizeof(s->orecv));
1591 s->orecv.hEvent = s->hrecv;
1592 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1593 if (!ret) {
1594 err = GetLastError();
1595 if (err == ERROR_IO_PENDING) {
1596 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1597 }
1598 }
1599
1600 if (size > 0) {
1601 qemu_chr_read(chr, buf, size);
1602 }
1603 }
1604
1605 static void win_chr_read(CharDriverState *chr)
1606 {
1607 WinCharState *s = chr->opaque;
1608
1609 if (s->len > s->max_size)
1610 s->len = s->max_size;
1611 if (s->len == 0)
1612 return;
1613
1614 win_chr_readfile(chr);
1615 }
1616
1617 static int win_chr_poll(void *opaque)
1618 {
1619 CharDriverState *chr = opaque;
1620 WinCharState *s = chr->opaque;
1621 COMSTAT status;
1622 DWORD comerr;
1623
1624 ClearCommError(s->hcom, &comerr, &status);
1625 if (status.cbInQue > 0) {
1626 s->len = status.cbInQue;
1627 win_chr_read_poll(chr);
1628 win_chr_read(chr);
1629 return 1;
1630 }
1631 return 0;
1632 }
1633
1634 static CharDriverState *qemu_chr_open_win(QemuOpts *opts)
1635 {
1636 const char *filename = qemu_opt_get(opts, "path");
1637 CharDriverState *chr;
1638 WinCharState *s;
1639
1640 chr = qemu_mallocz(sizeof(CharDriverState));
1641 s = qemu_mallocz(sizeof(WinCharState));
1642 chr->opaque = s;
1643 chr->chr_write = win_chr_write;
1644 chr->chr_close = win_chr_close;
1645
1646 if (win_chr_init(chr, filename) < 0) {
1647 free(s);
1648 free(chr);
1649 return NULL;
1650 }
1651 qemu_chr_generic_open(chr);
1652 return chr;
1653 }
1654
1655 static int win_chr_pipe_poll(void *opaque)
1656 {
1657 CharDriverState *chr = opaque;
1658 WinCharState *s = chr->opaque;
1659 DWORD size;
1660
1661 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1662 if (size > 0) {
1663 s->len = size;
1664 win_chr_read_poll(chr);
1665 win_chr_read(chr);
1666 return 1;
1667 }
1668 return 0;
1669 }
1670
1671 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1672 {
1673 WinCharState *s = chr->opaque;
1674 OVERLAPPED ov;
1675 int ret;
1676 DWORD size;
1677 char openname[256];
1678
1679 s->fpipe = TRUE;
1680
1681 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1682 if (!s->hsend) {
1683 fprintf(stderr, "Failed CreateEvent\n");
1684 goto fail;
1685 }
1686 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1687 if (!s->hrecv) {
1688 fprintf(stderr, "Failed CreateEvent\n");
1689 goto fail;
1690 }
1691
1692 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1693 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1694 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1695 PIPE_WAIT,
1696 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1697 if (s->hcom == INVALID_HANDLE_VALUE) {
1698 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1699 s->hcom = NULL;
1700 goto fail;
1701 }
1702
1703 ZeroMemory(&ov, sizeof(ov));
1704 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1705 ret = ConnectNamedPipe(s->hcom, &ov);
1706 if (ret) {
1707 fprintf(stderr, "Failed ConnectNamedPipe\n");
1708 goto fail;
1709 }
1710
1711 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1712 if (!ret) {
1713 fprintf(stderr, "Failed GetOverlappedResult\n");
1714 if (ov.hEvent) {
1715 CloseHandle(ov.hEvent);
1716 ov.hEvent = NULL;
1717 }
1718 goto fail;
1719 }
1720
1721 if (ov.hEvent) {
1722 CloseHandle(ov.hEvent);
1723 ov.hEvent = NULL;
1724 }
1725 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1726 return 0;
1727
1728 fail:
1729 win_chr_close(chr);
1730 return -1;
1731 }
1732
1733
1734 static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts)
1735 {
1736 const char *filename = qemu_opt_get(opts, "path");
1737 CharDriverState *chr;
1738 WinCharState *s;
1739
1740 chr = qemu_mallocz(sizeof(CharDriverState));
1741 s = qemu_mallocz(sizeof(WinCharState));
1742 chr->opaque = s;
1743 chr->chr_write = win_chr_write;
1744 chr->chr_close = win_chr_close;
1745
1746 if (win_chr_pipe_init(chr, filename) < 0) {
1747 free(s);
1748 free(chr);
1749 return NULL;
1750 }
1751 qemu_chr_generic_open(chr);
1752 return chr;
1753 }
1754
1755 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1756 {
1757 CharDriverState *chr;
1758 WinCharState *s;
1759
1760 chr = qemu_mallocz(sizeof(CharDriverState));
1761 s = qemu_mallocz(sizeof(WinCharState));
1762 s->hcom = fd_out;
1763 chr->opaque = s;
1764 chr->chr_write = win_chr_write;
1765 qemu_chr_generic_open(chr);
1766 return chr;
1767 }
1768
1769 static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts)
1770 {
1771 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1772 }
1773
1774 static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts)
1775 {
1776 const char *file_out = qemu_opt_get(opts, "path");
1777 HANDLE fd_out;
1778
1779 fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1780 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1781 if (fd_out == INVALID_HANDLE_VALUE)
1782 return NULL;
1783
1784 return qemu_chr_open_win_file(fd_out);
1785 }
1786 #endif /* !_WIN32 */
1787
1788 /***********************************************************/
1789 /* UDP Net console */
1790
1791 typedef struct {
1792 int fd;
1793 uint8_t buf[READ_BUF_LEN];
1794 int bufcnt;
1795 int bufptr;
1796 int max_size;
1797 } NetCharDriver;
1798
1799 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1800 {
1801 NetCharDriver *s = chr->opaque;
1802
1803 return send(s->fd, (const void *)buf, len, 0);
1804 }
1805
1806 static int udp_chr_read_poll(void *opaque)
1807 {
1808 CharDriverState *chr = opaque;
1809 NetCharDriver *s = chr->opaque;
1810
1811 s->max_size = qemu_chr_can_read(chr);
1812
1813 /* If there were any stray characters in the queue process them
1814 * first
1815 */
1816 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1817 qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1818 s->bufptr++;
1819 s->max_size = qemu_chr_can_read(chr);
1820 }
1821 return s->max_size;
1822 }
1823
1824 static void udp_chr_read(void *opaque)
1825 {
1826 CharDriverState *chr = opaque;
1827 NetCharDriver *s = chr->opaque;
1828
1829 if (s->max_size == 0)
1830 return;
1831 s->bufcnt = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1832 s->bufptr = s->bufcnt;
1833 if (s->bufcnt <= 0)
1834 return;
1835
1836 s->bufptr = 0;
1837 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1838 qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1839 s->bufptr++;
1840 s->max_size = qemu_chr_can_read(chr);
1841 }
1842 }
1843
1844 static void udp_chr_update_read_handler(CharDriverState *chr)
1845 {
1846 NetCharDriver *s = chr->opaque;
1847
1848 if (s->fd >= 0) {
1849 qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
1850 udp_chr_read, NULL, chr);
1851 }
1852 }
1853
1854 static void udp_chr_close(CharDriverState *chr)
1855 {
1856 NetCharDriver *s = chr->opaque;
1857 if (s->fd >= 0) {
1858 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1859 closesocket(s->fd);
1860 }
1861 qemu_free(s);
1862 qemu_chr_event(chr, CHR_EVENT_CLOSED);
1863 }
1864
1865 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
1866 {
1867 CharDriverState *chr = NULL;
1868 NetCharDriver *s = NULL;
1869 int fd = -1;
1870
1871 chr = qemu_mallocz(sizeof(CharDriverState));
1872 s = qemu_mallocz(sizeof(NetCharDriver));
1873
1874 fd = inet_dgram_opts(opts);
1875 if (fd < 0) {
1876 fprintf(stderr, "inet_dgram_opts failed\n");
1877 goto return_err;
1878 }
1879
1880 s->fd = fd;
1881 s->bufcnt = 0;
1882 s->bufptr = 0;
1883 chr->opaque = s;
1884 chr->chr_write = udp_chr_write;
1885 chr->chr_update_read_handler = udp_chr_update_read_handler;
1886 chr->chr_close = udp_chr_close;
1887 return chr;
1888
1889 return_err:
1890 if (chr)
1891 free(chr);
1892 if (s)
1893 free(s);
1894 if (fd >= 0)
1895 closesocket(fd);
1896 return NULL;
1897 }
1898
1899 /***********************************************************/
1900 /* TCP Net console */
1901
1902 typedef struct {
1903 int fd, listen_fd;
1904 int connected;
1905 int max_size;
1906 int do_telnetopt;
1907 int do_nodelay;
1908 int is_unix;
1909 int msgfd;
1910 } TCPCharDriver;
1911
1912 static void tcp_chr_accept(void *opaque);
1913
1914 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1915 {
1916 TCPCharDriver *s = chr->opaque;
1917 if (s->connected) {
1918 return send_all(s->fd, buf, len);
1919 } else {
1920 /* XXX: indicate an error ? */
1921 return len;
1922 }
1923 }
1924
1925 static int tcp_chr_read_poll(void *opaque)
1926 {
1927 CharDriverState *chr = opaque;
1928 TCPCharDriver *s = chr->opaque;
1929 if (!s->connected)
1930 return 0;
1931 s->max_size = qemu_chr_can_read(chr);
1932 return s->max_size;
1933 }
1934
1935 #define IAC 255
1936 #define IAC_BREAK 243
1937 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
1938 TCPCharDriver *s,
1939 uint8_t *buf, int *size)
1940 {
1941 /* Handle any telnet client's basic IAC options to satisfy char by
1942 * char mode with no echo. All IAC options will be removed from
1943 * the buf and the do_telnetopt variable will be used to track the
1944 * state of the width of the IAC information.
1945 *
1946 * IAC commands come in sets of 3 bytes with the exception of the
1947 * "IAC BREAK" command and the double IAC.
1948 */
1949
1950 int i;
1951 int j = 0;
1952
1953 for (i = 0; i < *size; i++) {
1954 if (s->do_telnetopt > 1) {
1955 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
1956 /* Double IAC means send an IAC */
1957 if (j != i)
1958 buf[j] = buf[i];
1959 j++;
1960 s->do_telnetopt = 1;
1961 } else {
1962 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
1963 /* Handle IAC break commands by sending a serial break */
1964 qemu_chr_event(chr, CHR_EVENT_BREAK);
1965 s->do_telnetopt++;
1966 }
1967 s->do_telnetopt++;
1968 }
1969 if (s->do_telnetopt >= 4) {
1970 s->do_telnetopt = 1;
1971 }
1972 } else {
1973 if ((unsigned char)buf[i] == IAC) {
1974 s->do_telnetopt = 2;
1975 } else {
1976 if (j != i)
1977 buf[j] = buf[i];
1978 j++;
1979 }
1980 }
1981 }
1982 *size = j;
1983 }
1984
1985 static int tcp_get_msgfd(CharDriverState *chr)
1986 {
1987 TCPCharDriver *s = chr->opaque;
1988 int fd = s->msgfd;
1989 s->msgfd = -1;
1990 return fd;
1991 }
1992
1993 #ifndef _WIN32
1994 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
1995 {
1996 TCPCharDriver *s = chr->opaque;
1997 struct cmsghdr *cmsg;
1998
1999 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2000 int fd;
2001
2002 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2003 cmsg->cmsg_level != SOL_SOCKET ||
2004 cmsg->cmsg_type != SCM_RIGHTS)
2005 continue;
2006
2007 fd = *((int *)CMSG_DATA(cmsg));
2008 if (fd < 0)
2009 continue;
2010
2011 if (s->msgfd != -1)
2012 close(s->msgfd);
2013 s->msgfd = fd;
2014 }
2015 }
2016
2017 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2018 {
2019 TCPCharDriver *s = chr->opaque;
2020 struct msghdr msg = { NULL, };
2021 struct iovec iov[1];
2022 union {
2023 struct cmsghdr cmsg;
2024 char control[CMSG_SPACE(sizeof(int))];
2025 } msg_control;
2026 ssize_t ret;
2027
2028 iov[0].iov_base = buf;
2029 iov[0].iov_len = len;
2030
2031 msg.msg_iov = iov;
2032 msg.msg_iovlen = 1;
2033 msg.msg_control = &msg_control;
2034 msg.msg_controllen = sizeof(msg_control);
2035
2036 ret = recvmsg(s->fd, &msg, 0);
2037 if (ret > 0 && s->is_unix)
2038 unix_process_msgfd(chr, &msg);
2039
2040 return ret;
2041 }
2042 #else
2043 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2044 {
2045 TCPCharDriver *s = chr->opaque;
2046 return recv(s->fd, buf, len, 0);
2047 }
2048 #endif
2049
2050 static void tcp_chr_read(void *opaque)
2051 {
2052 CharDriverState *chr = opaque;
2053 TCPCharDriver *s = chr->opaque;
2054 uint8_t buf[READ_BUF_LEN];
2055 int len, size;
2056
2057 if (!s->connected || s->max_size <= 0)
2058 return;
2059 len = sizeof(buf);
2060 if (len > s->max_size)
2061 len = s->max_size;
2062 size = tcp_chr_recv(chr, (void *)buf, len);
2063 if (size == 0) {
2064 /* connection closed */
2065 s->connected = 0;
2066 if (s->listen_fd >= 0) {
2067 qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2068 }
2069 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2070 closesocket(s->fd);
2071 s->fd = -1;
2072 qemu_chr_event(chr, CHR_EVENT_CLOSED);
2073 } else if (size > 0) {
2074 if (s->do_telnetopt)
2075 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2076 if (size > 0)
2077 qemu_chr_read(chr, buf, size);
2078 }
2079 }
2080
2081 #ifndef _WIN32
2082 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2083 {
2084 return qemu_chr_open_fd(eventfd, eventfd);
2085 }
2086 #endif
2087
2088 static void tcp_chr_connect(void *opaque)
2089 {
2090 CharDriverState *chr = opaque;
2091 TCPCharDriver *s = chr->opaque;
2092
2093 s->connected = 1;
2094 qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2095 tcp_chr_read, NULL, chr);
2096 qemu_chr_generic_open(chr);
2097 }
2098
2099 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2100 static void tcp_chr_telnet_init(int fd)
2101 {
2102 char buf[3];
2103 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2104 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2105 send(fd, (char *)buf, 3, 0);
2106 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2107 send(fd, (char *)buf, 3, 0);
2108 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2109 send(fd, (char *)buf, 3, 0);
2110 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2111 send(fd, (char *)buf, 3, 0);
2112 }
2113
2114 static void socket_set_nodelay(int fd)
2115 {
2116 int val = 1;
2117 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2118 }
2119
2120 static void tcp_chr_accept(void *opaque)
2121 {
2122 CharDriverState *chr = opaque;
2123 TCPCharDriver *s = chr->opaque;
2124 struct sockaddr_in saddr;
2125 #ifndef _WIN32
2126 struct sockaddr_un uaddr;
2127 #endif
2128 struct sockaddr *addr;
2129 socklen_t len;
2130 int fd;
2131
2132 for(;;) {
2133 #ifndef _WIN32
2134 if (s->is_unix) {
2135 len = sizeof(uaddr);
2136 addr = (struct sockaddr *)&uaddr;
2137 } else
2138 #endif
2139 {
2140 len = sizeof(saddr);
2141 addr = (struct sockaddr *)&saddr;
2142 }
2143 fd = qemu_accept(s->listen_fd, addr, &len);
2144 if (fd < 0 && errno != EINTR) {
2145 return;
2146 } else if (fd >= 0) {
2147 if (s->do_telnetopt)
2148 tcp_chr_telnet_init(fd);
2149 break;
2150 }
2151 }
2152 socket_set_nonblock(fd);
2153 if (s->do_nodelay)
2154 socket_set_nodelay(fd);
2155 s->fd = fd;
2156 qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2157 tcp_chr_connect(chr);
2158 }
2159
2160 static void tcp_chr_close(CharDriverState *chr)
2161 {
2162 TCPCharDriver *s = chr->opaque;
2163 if (s->fd >= 0) {
2164 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2165 closesocket(s->fd);
2166 }
2167 if (s->listen_fd >= 0) {
2168 qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2169 closesocket(s->listen_fd);
2170 }
2171 qemu_free(s);
2172 qemu_chr_event(chr, CHR_EVENT_CLOSED);
2173 }
2174
2175 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2176 {
2177 CharDriverState *chr = NULL;
2178 TCPCharDriver *s = NULL;
2179 int fd = -1;
2180 int is_listen;
2181 int is_waitconnect;
2182 int do_nodelay;
2183 int is_unix;
2184 int is_telnet;
2185
2186 is_listen = qemu_opt_get_bool(opts, "server", 0);
2187 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2188 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2189 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2190 is_unix = qemu_opt_get(opts, "path") != NULL;
2191 if (!is_listen)
2192 is_waitconnect = 0;
2193
2194 chr = qemu_mallocz(sizeof(CharDriverState));
2195 s = qemu_mallocz(sizeof(TCPCharDriver));
2196
2197 if (is_unix) {
2198 if (is_listen) {
2199 fd = unix_listen_opts(opts);
2200 } else {
2201 fd = unix_connect_opts(opts);
2202 }
2203 } else {
2204 if (is_listen) {
2205 fd = inet_listen_opts(opts, 0);
2206 } else {
2207 fd = inet_connect_opts(opts);
2208 }
2209 }
2210 if (fd < 0)
2211 goto fail;
2212
2213 if (!is_waitconnect)
2214 socket_set_nonblock(fd);
2215
2216 s->connected = 0;
2217 s->fd = -1;
2218 s->listen_fd = -1;
2219 s->msgfd = -1;
2220 s->is_unix = is_unix;
2221 s->do_nodelay = do_nodelay && !is_unix;
2222
2223 chr->opaque = s;
2224 chr->chr_write = tcp_chr_write;
2225 chr->chr_close = tcp_chr_close;
2226 chr->get_msgfd = tcp_get_msgfd;
2227
2228 if (is_listen) {
2229 s->listen_fd = fd;
2230 qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2231 if (is_telnet)
2232 s->do_telnetopt = 1;
2233
2234 } else {
2235 s->connected = 1;
2236 s->fd = fd;
2237 socket_set_nodelay(fd);
2238 tcp_chr_connect(chr);
2239 }
2240
2241 /* for "info chardev" monitor command */
2242 chr->filename = qemu_malloc(256);
2243 if (is_unix) {
2244 snprintf(chr->filename, 256, "unix:%s%s",
2245 qemu_opt_get(opts, "path"),
2246 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2247 } else if (is_telnet) {
2248 snprintf(chr->filename, 256, "telnet:%s:%s%s",
2249 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2250 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2251 } else {
2252 snprintf(chr->filename, 256, "tcp:%s:%s%s",
2253 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2254 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2255 }
2256
2257 if (is_listen && is_waitconnect) {
2258 printf("QEMU waiting for connection on: %s\n",
2259 chr->filename);
2260 tcp_chr_accept(chr);
2261 socket_set_nonblock(s->listen_fd);
2262 }
2263 return chr;
2264
2265 fail:
2266 if (fd >= 0)
2267 closesocket(fd);
2268 qemu_free(s);
2269 qemu_free(chr);
2270 return NULL;
2271 }
2272
2273 /***********************************************************/
2274 /* Memory chardev */
2275 typedef struct {
2276 size_t outbuf_size;
2277 size_t outbuf_capacity;
2278 uint8_t *outbuf;
2279 } MemoryDriver;
2280
2281 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2282 {
2283 MemoryDriver *d = chr->opaque;
2284
2285 /* TODO: the QString implementation has the same code, we should
2286 * introduce a generic way to do this in cutils.c */
2287 if (d->outbuf_capacity < d->outbuf_size + len) {
2288 /* grow outbuf */
2289 d->outbuf_capacity += len;
2290 d->outbuf_capacity *= 2;
2291 d->outbuf = qemu_realloc(d->outbuf, d->outbuf_capacity);
2292 }
2293
2294 memcpy(d->outbuf + d->outbuf_size, buf, len);
2295 d->outbuf_size += len;
2296
2297 return len;
2298 }
2299
2300 void qemu_chr_init_mem(CharDriverState *chr)
2301 {
2302 MemoryDriver *d;
2303
2304 d = qemu_malloc(sizeof(*d));
2305 d->outbuf_size = 0;
2306 d->outbuf_capacity = 4096;
2307 d->outbuf = qemu_mallocz(d->outbuf_capacity);
2308
2309 memset(chr, 0, sizeof(*chr));
2310 chr->opaque = d;
2311 chr->chr_write = mem_chr_write;
2312 }
2313
2314 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2315 {
2316 MemoryDriver *d = chr->opaque;
2317 return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2318 }
2319
2320 /* NOTE: this driver can not be closed with qemu_chr_close()! */
2321 void qemu_chr_close_mem(CharDriverState *chr)
2322 {
2323 MemoryDriver *d = chr->opaque;
2324
2325 qemu_free(d->outbuf);
2326 qemu_free(chr->opaque);
2327 chr->opaque = NULL;
2328 chr->chr_write = NULL;
2329 }
2330
2331 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2332 {
2333 const MemoryDriver *d = chr->opaque;
2334 return d->outbuf_size;
2335 }
2336
2337 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2338 {
2339 char host[65], port[33], width[8], height[8];
2340 int pos;
2341 const char *p;
2342 QemuOpts *opts;
2343
2344 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
2345 if (NULL == opts)
2346 return NULL;
2347
2348 if (strstart(filename, "mon:", &p)) {
2349 filename = p;
2350 qemu_opt_set(opts, "mux", "on");
2351 }
2352
2353 if (strcmp(filename, "null") == 0 ||
2354 strcmp(filename, "pty") == 0 ||
2355 strcmp(filename, "msmouse") == 0 ||
2356 strcmp(filename, "braille") == 0 ||
2357 strcmp(filename, "stdio") == 0) {
2358 qemu_opt_set(opts, "backend", filename);
2359 return opts;
2360 }
2361 if (strstart(filename, "vc", &p)) {
2362 qemu_opt_set(opts, "backend", "vc");
2363 if (*p == ':') {
2364 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2365 /* pixels */
2366 qemu_opt_set(opts, "width", width);
2367 qemu_opt_set(opts, "height", height);
2368 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2369 /* chars */
2370 qemu_opt_set(opts, "cols", width);
2371 qemu_opt_set(opts, "rows", height);
2372 } else {
2373 goto fail;
2374 }
2375 }
2376 return opts;
2377 }
2378 if (strcmp(filename, "con:") == 0) {
2379 qemu_opt_set(opts, "backend", "console");
2380 return opts;
2381 }
2382 if (strstart(filename, "COM", NULL)) {
2383 qemu_opt_set(opts, "backend", "serial");
2384 qemu_opt_set(opts, "path", filename);
2385 return opts;
2386 }
2387 if (strstart(filename, "file:", &p)) {
2388 qemu_opt_set(opts, "backend", "file");
2389 qemu_opt_set(opts, "path", p);
2390 return opts;
2391 }
2392 if (strstart(filename, "pipe:", &p)) {
2393 qemu_opt_set(opts, "backend", "pipe");
2394 qemu_opt_set(opts, "path", p);
2395 return opts;
2396 }
2397 if (strstart(filename, "tcp:", &p) ||
2398 strstart(filename, "telnet:", &p)) {
2399 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2400 host[0] = 0;
2401 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2402 goto fail;
2403 }
2404 qemu_opt_set(opts, "backend", "socket");
2405 qemu_opt_set(opts, "host", host);
2406 qemu_opt_set(opts, "port", port);
2407 if (p[pos] == ',') {
2408 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2409 goto fail;
2410 }
2411 if (strstart(filename, "telnet:", &p))
2412 qemu_opt_set(opts, "telnet", "on");
2413 return opts;
2414 }
2415 if (strstart(filename, "udp:", &p)) {
2416 qemu_opt_set(opts, "backend", "udp");
2417 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2418 host[0] = 0;
2419 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2420 goto fail;
2421 }
2422 }
2423 qemu_opt_set(opts, "host", host);
2424 qemu_opt_set(opts, "port", port);
2425 if (p[pos] == '@') {
2426 p += pos + 1;
2427 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2428 host[0] = 0;
2429 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2430 goto fail;
2431 }
2432 }
2433 qemu_opt_set(opts, "localaddr", host);
2434 qemu_opt_set(opts, "localport", port);
2435 }
2436 return opts;
2437 }
2438 if (strstart(filename, "unix:", &p)) {
2439 qemu_opt_set(opts, "backend", "socket");
2440 if (qemu_opts_do_parse(opts, p, "path") != 0)
2441 goto fail;
2442 return opts;
2443 }
2444 if (strstart(filename, "/dev/parport", NULL) ||
2445 strstart(filename, "/dev/ppi", NULL)) {
2446 qemu_opt_set(opts, "backend", "parport");
2447 qemu_opt_set(opts, "path", filename);
2448 return opts;
2449 }
2450 if (strstart(filename, "/dev/", NULL)) {
2451 qemu_opt_set(opts, "backend", "tty");
2452 qemu_opt_set(opts, "path", filename);
2453 return opts;
2454 }
2455
2456 fail:
2457 qemu_opts_del(opts);
2458 return NULL;
2459 }
2460
2461 static const struct {
2462 const char *name;
2463 CharDriverState *(*open)(QemuOpts *opts);
2464 } backend_table[] = {
2465 { .name = "null", .open = qemu_chr_open_null },
2466 { .name = "socket", .open = qemu_chr_open_socket },
2467 { .name = "udp", .open = qemu_chr_open_udp },
2468 { .name = "msmouse", .open = qemu_chr_open_msmouse },
2469 { .name = "vc", .open = text_console_init },
2470 #ifdef _WIN32
2471 { .name = "file", .open = qemu_chr_open_win_file_out },
2472 { .name = "pipe", .open = qemu_chr_open_win_pipe },
2473 { .name = "console", .open = qemu_chr_open_win_con },
2474 { .name = "serial", .open = qemu_chr_open_win },
2475 #else
2476 { .name = "file", .open = qemu_chr_open_file_out },
2477 { .name = "pipe", .open = qemu_chr_open_pipe },
2478 { .name = "pty", .open = qemu_chr_open_pty },
2479 { .name = "stdio", .open = qemu_chr_open_stdio },
2480 #endif
2481 #ifdef CONFIG_BRLAPI
2482 { .name = "braille", .open = chr_baum_init },
2483 #endif
2484 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2485 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
2486 || defined(__FreeBSD_kernel__)
2487 { .name = "tty", .open = qemu_chr_open_tty },
2488 #endif
2489 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
2490 || defined(__FreeBSD_kernel__)
2491 { .name = "parport", .open = qemu_chr_open_pp },
2492 #endif
2493 #ifdef CONFIG_SPICE
2494 { .name = "spicevmc", .open = qemu_chr_open_spice },
2495 #endif
2496 };
2497
2498 CharDriverState *qemu_chr_open_opts(QemuOpts *opts,
2499 void (*init)(struct CharDriverState *s))
2500 {
2501 CharDriverState *chr;
2502 int i;
2503
2504 if (qemu_opts_id(opts) == NULL) {
2505 fprintf(stderr, "chardev: no id specified\n");
2506 return NULL;
2507 }
2508
2509 if (qemu_opt_get(opts, "backend") == NULL) {
2510 fprintf(stderr, "chardev: \"%s\" missing backend\n",
2511 qemu_opts_id(opts));
2512 return NULL;
2513 }
2514 for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2515 if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2516 break;
2517 }
2518 if (i == ARRAY_SIZE(backend_table)) {
2519 fprintf(stderr, "chardev: backend \"%s\" not found\n",
2520 qemu_opt_get(opts, "backend"));
2521 return NULL;
2522 }
2523
2524 chr = backend_table[i].open(opts);
2525 if (!chr) {
2526 fprintf(stderr, "chardev: opening backend \"%s\" failed\n",
2527 qemu_opt_get(opts, "backend"));
2528 return NULL;
2529 }
2530
2531 if (!chr->filename)
2532 chr->filename = qemu_strdup(qemu_opt_get(opts, "backend"));
2533 chr->init = init;
2534 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2535
2536 if (qemu_opt_get_bool(opts, "mux", 0)) {
2537 CharDriverState *base = chr;
2538 int len = strlen(qemu_opts_id(opts)) + 6;
2539 base->label = qemu_malloc(len);
2540 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
2541 chr = qemu_chr_open_mux(base);
2542 chr->filename = base->filename;
2543 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2544 }
2545 chr->label = qemu_strdup(qemu_opts_id(opts));
2546 return chr;
2547 }
2548
2549 CharDriverState *qemu_chr_open(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2550 {
2551 const char *p;
2552 CharDriverState *chr;
2553 QemuOpts *opts;
2554
2555 if (strstart(filename, "chardev:", &p)) {
2556 return qemu_chr_find(p);
2557 }
2558
2559 opts = qemu_chr_parse_compat(label, filename);
2560 if (!opts)
2561 return NULL;
2562
2563 chr = qemu_chr_open_opts(opts, init);
2564 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
2565 monitor_init(chr, MONITOR_USE_READLINE);
2566 }
2567 qemu_opts_del(opts);
2568 return chr;
2569 }
2570
2571 void qemu_chr_set_echo(struct CharDriverState *chr, bool echo)
2572 {
2573 if (chr->chr_set_echo) {
2574 chr->chr_set_echo(chr, echo);
2575 }
2576 }
2577
2578 void qemu_chr_close(CharDriverState *chr)
2579 {
2580 QTAILQ_REMOVE(&chardevs, chr, next);
2581 if (chr->chr_close)
2582 chr->chr_close(chr);
2583 qemu_free(chr->filename);
2584 qemu_free(chr->label);
2585 qemu_free(chr);
2586 }
2587
2588 static void qemu_chr_qlist_iter(QObject *obj, void *opaque)
2589 {
2590 QDict *chr_dict;
2591 Monitor *mon = opaque;
2592
2593 chr_dict = qobject_to_qdict(obj);
2594 monitor_printf(mon, "%s: filename=%s\n", qdict_get_str(chr_dict, "label"),
2595 qdict_get_str(chr_dict, "filename"));
2596 }
2597
2598 void qemu_chr_info_print(Monitor *mon, const QObject *ret_data)
2599 {
2600 qlist_iter(qobject_to_qlist(ret_data), qemu_chr_qlist_iter, mon);
2601 }
2602
2603 void qemu_chr_info(Monitor *mon, QObject **ret_data)
2604 {
2605 QList *chr_list;
2606 CharDriverState *chr;
2607
2608 chr_list = qlist_new();
2609
2610 QTAILQ_FOREACH(chr, &chardevs, next) {
2611 QObject *obj = qobject_from_jsonf("{ 'label': %s, 'filename': %s }",
2612 chr->label, chr->filename);
2613 qlist_append_obj(chr_list, obj);
2614 }
2615
2616 *ret_data = QOBJECT(chr_list);
2617 }
2618
2619 CharDriverState *qemu_chr_find(const char *name)
2620 {
2621 CharDriverState *chr;
2622
2623 QTAILQ_FOREACH(chr, &chardevs, next) {
2624 if (strcmp(chr->label, name) != 0)
2625 continue;
2626 return chr;
2627 }
2628 return NULL;
2629 }
QEmu