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[thirdparty/qemu.git] / qemu-char.c
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6f97dba0
AL		 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 */
d38ea87a 24#include "qemu/osdep.h"
6f97dba0 25#include "qemu-common.h"
f348b6d1 26#include "qemu/cutils.h"
83c9089e 27#include "monitor/monitor.h"
9c17d615 28#include "sysemu/sysemu.h"
da31d594 29#include "sysemu/block-backend.h"
d49b6836 30#include "qemu/error-report.h"
1de7afc9 31#include "qemu/timer.h"
dccfcd0e 32#include "sysemu/char.h"
cf3ebac7 33#include "hw/usb.h"
c5a415a0 34#include "qmp-commands.h"
37f9e0a2 35#include "qapi/clone-visitor.h"
cfb429cb 36#include "qapi-visit.h"
e9cf2fe0 37#include "qemu/base64.h"
9894dc0c
DB		 38#include "io/channel-socket.h"
39#include "io/channel-file.h"
a8fb5427 40#include "io/channel-tls.h"
33577b47 41#include "sysemu/replay.h"
517b3d40 42#include "qemu/help_option.h"
6f97dba0 43
6f97dba0
AL		 44#include <zlib.h>
45
46#ifndef _WIN32
47#include <sys/times.h>
48#include <sys/wait.h>
49#include <termios.h>
6f97dba0 50#include <sys/ioctl.h>
24646c7e 51#include <sys/resource.h>
6f97dba0
AL		 52#include <sys/socket.h>
53#include <netinet/in.h>
24646c7e 54#include <net/if.h>
24646c7e 55#include <arpa/inet.h>
6f97dba0
AL		 56#include <netdb.h>
57#include <sys/select.h>
71e72a19 58#ifdef CONFIG_BSD
3294ce18
MT		 59#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
60#include <dev/ppbus/ppi.h>
61#include <dev/ppbus/ppbconf.h>
c5e97233 62#elif defined(__DragonFly__)
c5e97233
BS		 63#include <dev/misc/ppi/ppi.h>
64#include <bus/ppbus/ppbconf.h>
6f97dba0 65#endif
bbe813a2 66#else
6f97dba0 67#ifdef __linux__
6f97dba0
AL		 68#include <linux/ppdev.h>
69#include <linux/parport.h>
70#endif
71#ifdef __sun__
6f97dba0
AL		 72#include <sys/ethernet.h>
73#include <sys/sockio.h>
74#include <netinet/arp.h>
75#include <netinet/in.h>
76#include <netinet/in_systm.h>
77#include <netinet/ip.h>
78#include <netinet/ip_icmp.h> // must come after ip.h
79#include <netinet/udp.h>
80#include <netinet/tcp.h>
6f97dba0
AL		 81#endif
82#endif
83#endif
84
1de7afc9 85#include "qemu/sockets.h"
cbcc6336 86#include "ui/qemu-spice.h"
6f97dba0 87
9bd7854e 88#define READ_BUF_LEN 4096
7b0bfdf5 89#define READ_RETRIES 10
c4095726 90#define TCP_MAX_FDS 16
9bd7854e 91
0ec7b3e7 92typedef struct MuxChardev MuxChardev;
6dfa8298 93
cfb429cb
CM		 94/***********************************************************/
95/* Socket address helpers */
cfb429cb 96
0ff0fad2
DB		 97static char *SocketAddress_to_str(const char *prefix, SocketAddress *addr,
98 bool is_listen, bool is_telnet)
16cc4ffe 99{
130257dc 100 switch (addr->type) {
16cc4ffe 101 case SOCKET_ADDRESS_KIND_INET:
0ff0fad2 102 return g_strdup_printf("%s%s:%s:%s%s", prefix,
32bafa8f
EB		 103 is_telnet ? "telnet" : "tcp",
104 addr->u.inet.data->host,
105 addr->u.inet.data->port,
106 is_listen ? ",server" : "");
16cc4ffe
CM		 107 break;
108 case SOCKET_ADDRESS_KIND_UNIX:
0ff0fad2 109 return g_strdup_printf("%sunix:%s%s", prefix,
32bafa8f 110 addr->u.q_unix.data->path,
0ff0fad2 111 is_listen ? ",server" : "");
16cc4ffe
CM		 112 break;
113 case SOCKET_ADDRESS_KIND_FD:
32bafa8f 114 return g_strdup_printf("%sfd:%s%s", prefix, addr->u.fd.data->str,
0ff0fad2 115 is_listen ? ",server" : "");
16cc4ffe
CM		 116 break;
117 default:
118 abort();
119 }
120}
121
0ff0fad2
DB		 122static char *sockaddr_to_str(struct sockaddr_storage *ss, socklen_t ss_len,
123 struct sockaddr_storage *ps, socklen_t ps_len,
124 bool is_listen, bool is_telnet)
16cc4ffe 125{
01ca519f
CM		 126 char shost[NI_MAXHOST], sserv[NI_MAXSERV];
127 char phost[NI_MAXHOST], pserv[NI_MAXSERV];
16cc4ffe
CM		 128 const char *left = "", *right = "";
129
130 switch (ss->ss_family) {
131#ifndef _WIN32
132 case AF_UNIX:
0ff0fad2
DB		 133 return g_strdup_printf("unix:%s%s",
134 ((struct sockaddr_un *)(ss))->sun_path,
135 is_listen ? ",server" : "");
16cc4ffe
CM		 136#endif
137 case AF_INET6:
138 left = "[";
139 right = "]";
140 /* fall through */
141 case AF_INET:
01ca519f
CM		 142 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost),
143 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV);
144 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost),
145 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV);
0ff0fad2
DB		 146 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s",
147 is_telnet ? "telnet" : "tcp",
148 left, shost, right, sserv,
149 is_listen ? ",server" : "",
150 left, phost, right, pserv);
16cc4ffe
CM		 151
152 default:
0ff0fad2 153 return g_strdup_printf("unknown");
16cc4ffe
CM		 154 }
155}
156
6f97dba0
AL		 157/***********************************************************/
158/* character device */
159
0ec7b3e7 160static QTAILQ_HEAD(ChardevHead, Chardev) chardevs =
72cf2d4f 161 QTAILQ_HEAD_INITIALIZER(chardevs);
2970a6c9 162
0ec7b3e7 163void qemu_chr_be_event(Chardev *s, int event)
6f97dba0 164{
a4afa548
MAL		 165 CharBackend *be = s->be;
166
73cdf3f2
AG		 167 /* Keep track if the char device is open */
168 switch (event) {
169 case CHR_EVENT_OPENED:
16665b94 170 s->be_open = 1;
73cdf3f2
AG		 171 break;
172 case CHR_EVENT_CLOSED:
16665b94 173 s->be_open = 0;
73cdf3f2
AG		 174 break;
175 }
176
a4afa548 177 if (!be || !be->chr_event) {
6f97dba0 178 return;
a4afa548
MAL		 179 }
180
181 be->chr_event(be->opaque, event);
6f97dba0
AL		 182}
183
0ec7b3e7 184void qemu_chr_be_generic_open(Chardev *s)
6f97dba0 185{
bd5c51ee 186 qemu_chr_be_event(s, CHR_EVENT_OPENED);
6f97dba0
AL		 187}
188
d0d7708b
DB		 189
190/* Not reporting errors from writing to logfile, as logs are
191 * defined to be "best effort" only */
0ec7b3e7 192static void qemu_chr_fe_write_log(Chardev *s,
d0d7708b
DB		 193 const uint8_t *buf, size_t len)
194{
195 size_t done = 0;
196 ssize_t ret;
197
198 if (s->logfd < 0) {
199 return;
200 }
201
202 while (done < len) {
53628efb
DB		 203 retry:
204 ret = write(s->logfd, buf + done, len - done);
205 if (ret == -1 && errno == EAGAIN) {
206 g_usleep(100);
207 goto retry;
208 }
d0d7708b
DB		 209
210 if (ret <= 0) {
211 return;
212 }
213 done += ret;
214 }
215}
216
0ec7b3e7
MAL		 217static int qemu_chr_fe_write_buffer(Chardev *s,
218 const uint8_t *buf, int len, int *offset)
33577b47 219{
777357d7 220 ChardevClass *cc = CHARDEV_GET_CLASS(s);
33577b47
PD		 221 int res = 0;
222 *offset = 0;
223
224 qemu_mutex_lock(&s->chr_write_lock);
225 while (*offset < len) {
53628efb 226 retry:
777357d7 227 res = cc->chr_write(s, buf + *offset, len - *offset);
53628efb
DB		 228 if (res < 0 && errno == EAGAIN) {
229 g_usleep(100);
230 goto retry;
231 }
33577b47
PD		 232
233 if (res <= 0) {
234 break;
235 }
236
237 *offset += res;
238 }
239 if (*offset > 0) {
240 qemu_chr_fe_write_log(s, buf, *offset);
241 }
242 qemu_mutex_unlock(&s->chr_write_lock);
243
244 return res;
245}
246
0ec7b3e7 247static bool qemu_chr_replay(Chardev *chr)
5ebd6703
MAL		 248{
249 return qemu_chr_has_feature(chr, QEMU_CHAR_FEATURE_REPLAY);
250}
251
5345fdb4 252int qemu_chr_fe_write(CharBackend *be, const uint8_t *buf, int len)
6f97dba0 253{
0ec7b3e7 254 Chardev *s = be->chr;
777357d7 255 ChardevClass *cc;
9005b2a7
PB		 256 int ret;
257
fa394ed6
MAL		 258 if (!s) {
259 return 0;
260 }
261
5ebd6703 262 if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_PLAY) {
33577b47
PD		 263 int offset;
264 replay_char_write_event_load(&ret, &offset);
265 assert(offset <= len);
266 qemu_chr_fe_write_buffer(s, buf, offset, &offset);
267 return ret;
268 }
269
777357d7 270 cc = CHARDEV_GET_CLASS(s);
9005b2a7 271 qemu_mutex_lock(&s->chr_write_lock);
777357d7 272 ret = cc->chr_write(s, buf, len);
d0d7708b
DB		 273
274 if (ret > 0) {
275 qemu_chr_fe_write_log(s, buf, ret);
276 }
277
9005b2a7 278 qemu_mutex_unlock(&s->chr_write_lock);
33577b47 279
5ebd6703 280 if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_RECORD) {
33577b47
PD		 281 replay_char_write_event_save(ret, ret < 0 ? 0 : ret);
282 }
283
9005b2a7 284 return ret;
6f97dba0
AL		 285}
286
0ec7b3e7 287static int qemu_chr_write_all(Chardev *s, const uint8_t *buf, int len)
cd18720a 288{
33577b47
PD		 289 int offset;
290 int res;
cd18720a 291
5ebd6703 292 if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_PLAY) {
33577b47
PD		 293 replay_char_write_event_load(&res, &offset);
294 assert(offset <= len);
295 qemu_chr_fe_write_buffer(s, buf, offset, &offset);
296 return res;
297 }
cd18720a 298
33577b47 299 res = qemu_chr_fe_write_buffer(s, buf, len, &offset);
cd18720a 300
5ebd6703 301 if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_RECORD) {
33577b47 302 replay_char_write_event_save(res, offset);
cd18720a
AL		 303 }
304
9005b2a7
PB		 305 if (res < 0) {
306 return res;
307 }
cd18720a
AL		 308 return offset;
309}
310
5345fdb4 311int qemu_chr_fe_write_all(CharBackend *be, const uint8_t *buf, int len)
7b0bfdf5 312{
0ec7b3e7 313 Chardev *s = be->chr;
5345fdb4 314
fa394ed6
MAL		 315 if (!s) {
316 return 0;
317 }
318
5345fdb4
MAL		 319 return qemu_chr_write_all(s, buf, len);
320}
321
322int qemu_chr_fe_read_all(CharBackend *be, uint8_t *buf, int len)
323{
0ec7b3e7 324 Chardev *s = be->chr;
7b0bfdf5
NN		 325 int offset = 0, counter = 10;
326 int res;
327
777357d7 328 if (!s || !CHARDEV_GET_CLASS(s)->chr_sync_read) {
7b0bfdf5
NN		 329 return 0;
330 }
fa394ed6 331
5ebd6703 332 if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_PLAY) {
33577b47
PD		 333 return replay_char_read_all_load(buf);
334 }
7b0bfdf5
NN		 335
336 while (offset < len) {
53628efb 337 retry:
777357d7
MAL		 338 res = CHARDEV_GET_CLASS(s)->chr_sync_read(s, buf + offset,
339 len - offset);
53628efb
DB		 340 if (res == -1 && errno == EAGAIN) {
341 g_usleep(100);
342 goto retry;
343 }
7b0bfdf5
NN		 344
345 if (res == 0) {
346 break;
347 }
348
349 if (res < 0) {
5ebd6703 350 if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_RECORD) {
33577b47
PD		 351 replay_char_read_all_save_error(res);
352 }
7b0bfdf5
NN		 353 return res;
354 }
355
356 offset += res;
357
358 if (!counter--) {
359 break;
360 }
361 }
362
5ebd6703 363 if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_RECORD) {
33577b47
PD		 364 replay_char_read_all_save_buf(buf, offset);
365 }
7b0bfdf5
NN		 366 return offset;
367}
368
5345fdb4 369int qemu_chr_fe_ioctl(CharBackend *be, int cmd, void *arg)
6f97dba0 370{
0ec7b3e7 371 Chardev *s = be->chr;
33577b47 372 int res;
fa394ed6 373
777357d7 374 if (!s || !CHARDEV_GET_CLASS(s)->chr_ioctl || qemu_chr_replay(s)) {
33577b47
PD		 375 res = -ENOTSUP;
376 } else {
777357d7 377 res = CHARDEV_GET_CLASS(s)->chr_ioctl(s, cmd, arg);
33577b47
PD		 378 }
379
380 return res;
6f97dba0
AL		 381}
382
0ec7b3e7 383int qemu_chr_be_can_write(Chardev *s)
6f97dba0 384{
a4afa548
MAL		 385 CharBackend *be = s->be;
386
387 if (!be || !be->chr_can_read) {
6f97dba0 388 return 0;
a4afa548
MAL		 389 }
390
391 return be->chr_can_read(be->opaque);
6f97dba0
AL		 392}
393
0ec7b3e7 394void qemu_chr_be_write_impl(Chardev *s, uint8_t *buf, int len)
6f97dba0 395{
a4afa548
MAL		 396 CharBackend *be = s->be;
397
398 if (be && be->chr_read) {
399 be->chr_read(be->opaque, buf, len);
ac310734 400 }
6f97dba0
AL		 401}
402
0ec7b3e7 403void qemu_chr_be_write(Chardev *s, uint8_t *buf, int len)
33577b47 404{
5ebd6703 405 if (qemu_chr_replay(s)) {
33577b47
PD		 406 if (replay_mode == REPLAY_MODE_PLAY) {
407 return;
408 }
409 replay_chr_be_write(s, buf, len);
410 } else {
411 qemu_chr_be_write_impl(s, buf, len);
412 }
413}
414
5345fdb4 415int qemu_chr_fe_get_msgfd(CharBackend *be)
7d174059 416{
0ec7b3e7 417 Chardev *s = be->chr;
c76bf6bb 418 int fd;
5345fdb4 419 int res = (qemu_chr_fe_get_msgfds(be, &fd, 1) == 1) ? fd : -1;
5ebd6703 420 if (s && qemu_chr_replay(s)) {
776a32a0
MAL		 421 error_report("Replay: get msgfd is not supported "
422 "for serial devices yet");
33577b47
PD		 423 exit(1);
424 }
425 return res;
c76bf6bb
NN		 426}
427
5345fdb4 428int qemu_chr_fe_get_msgfds(CharBackend *be, int *fds, int len)
c76bf6bb 429{
0ec7b3e7 430 Chardev *s = be->chr;
5345fdb4 431
fa394ed6
MAL		 432 if (!s) {
433 return -1;
434 }
435
777357d7
MAL		 436 return CHARDEV_GET_CLASS(s)->get_msgfds ?
437 CHARDEV_GET_CLASS(s)->get_msgfds(s, fds, len) : -1;
7d174059
MM		 438}
439
5345fdb4 440int qemu_chr_fe_set_msgfds(CharBackend *be, int *fds, int num)
d39aac7a 441{
0ec7b3e7 442 Chardev *s = be->chr;
5345fdb4 443
fa394ed6
MAL		 444 if (!s) {
445 return -1;
446 }
447
777357d7
MAL		 448 return CHARDEV_GET_CLASS(s)->set_msgfds ?
449 CHARDEV_GET_CLASS(s)->set_msgfds(s, fds, num) : -1;
d39aac7a
NN		 450}
451
0ec7b3e7 452int qemu_chr_add_client(Chardev *s, int fd)
13661089 453{
777357d7
MAL		 454 return CHARDEV_GET_CLASS(s)->chr_add_client ?
455 CHARDEV_GET_CLASS(s)->chr_add_client(s, fd) : -1;
13661089
DB		 456}
457
5345fdb4 458void qemu_chr_fe_accept_input(CharBackend *be)
6f97dba0 459{
0ec7b3e7 460 Chardev *s = be->chr;
5345fdb4 461
fa394ed6
MAL		 462 if (!s) {
463 return;
464 }
465
777357d7
MAL		 466 if (CHARDEV_GET_CLASS(s)->chr_accept_input) {
467 CHARDEV_GET_CLASS(s)->chr_accept_input(s);
b68e956a 468 }
98c8ee1d 469 qemu_notify_event();
6f97dba0
AL		 470}
471
5345fdb4 472void qemu_chr_fe_printf(CharBackend *be, const char *fmt, ...)
6f97dba0 473{
9bd7854e 474 char buf[READ_BUF_LEN];
6f97dba0
AL		 475 va_list ap;
476 va_start(ap, fmt);
477 vsnprintf(buf, sizeof(buf), fmt, ap);
90f998f5
DB		 478 /* XXX this blocks entire thread. Rewrite to use
479 * qemu_chr_fe_write and background I/O callbacks */
5345fdb4 480 qemu_chr_fe_write_all(be, (uint8_t *)buf, strlen(buf));
6f97dba0
AL		 481 va_end(ap);
482}
483
0ec7b3e7
MAL		 484static void remove_fd_in_watch(Chardev *chr);
485static void mux_chr_set_handlers(Chardev *chr, GMainContext *context);
486static void mux_set_focus(Chardev *chr, int focus);
6dfa8298 487
777357d7
MAL		 488static void qemu_char_open(Chardev *chr, ChardevBackend *backend,
489 bool *be_opened, Error **errp)
6f97dba0 490{
777357d7
MAL		 491 ChardevClass *cc = CHARDEV_GET_CLASS(chr);
492 /* Any ChardevCommon member would work */
493 ChardevCommon *common = backend ? backend->u.null.data : NULL;
494
495 if (common && common->has_logfile) {
496 int flags = O_WRONLY | O_CREAT;
497 if (common->has_logappend &&
498 common->logappend) {
499 flags |= O_APPEND;
500 } else {
501 flags |= O_TRUNC;
502 }
503 chr->logfd = qemu_open(common->logfile, flags, 0666);
504 if (chr->logfd < 0) {
505 error_setg_errno(errp, errno,
506 "Unable to open logfile %s",
507 common->logfile);
508 return;
509 }
510 }
511
512 if (cc->open) {
513 cc->open(chr, backend, be_opened, errp);
514 }
6f97dba0
AL		 515}
516
777357d7 517static void char_init(Object *obj)
6f97dba0 518{
777357d7 519 Chardev *chr = CHARDEV(obj);
6f97dba0 520
777357d7
MAL		 521 chr->logfd = -1;
522 qemu_mutex_init(&chr->chr_write_lock);
523}
524
525static void char_finalize(Object *obj)
526{
527 Chardev *chr = CHARDEV(obj);
528
529 if (chr->be) {
530 chr->be->chr = NULL;
531 }
532 g_free(chr->filename);
533 g_free(chr->label);
534 if (chr->logfd != -1) {
535 close(chr->logfd);
d0d7708b 536 }
777357d7
MAL		 537 qemu_mutex_destroy(&chr->chr_write_lock);
538}
539
540static const TypeInfo char_type_info = {
541 .name = TYPE_CHARDEV,
542 .parent = TYPE_OBJECT,
543 .instance_size = sizeof(Chardev),
544 .instance_init = char_init,
545 .instance_finalize = char_finalize,
546 .abstract = true,
547 .class_size = sizeof(ChardevClass),
548};
549
550static int null_chr_write(Chardev *chr, const uint8_t *buf, int len)
551{
552 return len;
553}
554
555static void null_chr_open(Chardev *chr,
556 ChardevBackend *backend,
557 bool *be_opened,
558 Error **errp)
559{
82878dac 560 *be_opened = false;
6f97dba0
AL		 561}
562
b68e956a
MAL		 563static const CharDriver null_driver = {
564 .kind = CHARDEV_BACKEND_KIND_NULL,
777357d7
MAL		 565};
566
567static void char_null_class_init(ObjectClass *oc, void *data)
568{
569 ChardevClass *cc = CHARDEV_CLASS(oc);
570
571 cc->open = null_chr_open;
572 cc->chr_write = null_chr_write;
573}
574
575static const TypeInfo char_null_type_info = {
576 .name = TYPE_CHARDEV_NULL,
577 .parent = TYPE_CHARDEV,
578 .instance_size = sizeof(Chardev),
579 .class_init = char_null_class_init,
b68e956a
MAL		 580};
581
6f97dba0 582/* MUX driver for serial I/O splitting */
6f97dba0
AL		 583#define MAX_MUX 4
584#define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
585#define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
0ec7b3e7
MAL		 586struct MuxChardev {
587 Chardev parent;
a4afa548 588 CharBackend *backends[MAX_MUX];
ecb672d1 589 CharBackend chr;
799f1f23 590 int focus;
6f97dba0
AL		 591 int mux_cnt;
592 int term_got_escape;
593 int max_size;
a80bf99f
AL		 594 /* Intermediate input buffer allows to catch escape sequences even if the
595 currently active device is not accepting any input - but only until it
596 is full as well. */
597 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
598 int prod[MAX_MUX];
599 int cons[MAX_MUX];
2d22959d 600 int timestamps;
9005b2a7 601
0ec7b3e7 602 /* Protected by the Chardev chr_write_lock. */
4ab312f7 603 int linestart;
2d22959d 604 int64_t timestamps_start;
6dfa8298 605};
6f97dba0 606
777357d7
MAL		 607#define MUX_CHARDEV(obj) OBJECT_CHECK(MuxChardev, (obj), TYPE_CHARDEV_MUX)
608
9005b2a7 609/* Called with chr_write_lock held. */
0ec7b3e7 610static int mux_chr_write(Chardev *chr, const uint8_t *buf, int len)
6f97dba0 611{
777357d7 612 MuxChardev *d = MUX_CHARDEV(chr);
6f97dba0 613 int ret;
2d22959d 614 if (!d->timestamps) {
5345fdb4 615 ret = qemu_chr_fe_write(&d->chr, buf, len);
6f97dba0
AL		 616 } else {
617 int i;
618
619 ret = 0;
4ab312f7
JK		 620 for (i = 0; i < len; i++) {
621 if (d->linestart) {
6f97dba0
AL		 622 char buf1[64];
623 int64_t ti;
624 int secs;
625
bc72ad67 626 ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
2d22959d
JK		 627 if (d->timestamps_start == -1)
628 d->timestamps_start = ti;
629 ti -= d->timestamps_start;
a4bb1db8 630 secs = ti / 1000;
6f97dba0
AL		 631 snprintf(buf1, sizeof(buf1),
632 "[%02d:%02d:%02d.%03d] ",
633 secs / 3600,
634 (secs / 60) % 60,
635 secs % 60,
a4bb1db8 636 (int)(ti % 1000));
90f998f5
DB		 637 /* XXX this blocks entire thread. Rewrite to use
638 * qemu_chr_fe_write and background I/O callbacks */
5345fdb4
MAL		 639 qemu_chr_fe_write_all(&d->chr,
640 (uint8_t *)buf1, strlen(buf1));
4ab312f7
JK		 641 d->linestart = 0;
642 }
5345fdb4 643 ret += qemu_chr_fe_write(&d->chr, buf + i, 1);
4ab312f7
JK		 644 if (buf[i] == '\n') {
645 d->linestart = 1;
6f97dba0
AL		 646 }
647 }
648 }
649 return ret;
650}
651
652static const char * const mux_help[] = {
653 "% h print this help\n\r",
654 "% x exit emulator\n\r",
655 "% s save disk data back to file (if -snapshot)\n\r",
86d10328 656 "% t toggle console timestamps\n\r",
6f97dba0
AL		 657 "% b send break (magic sysrq)\n\r",
658 "% c switch between console and monitor\n\r",
659 "% % sends %\n\r",
660 NULL
661};
662
663int term_escape_char = 0x01; /* ctrl-a is used for escape */
0ec7b3e7 664static void mux_print_help(Chardev *chr)
6f97dba0
AL		 665{
666 int i, j;
667 char ebuf[15] = "Escape-Char";
668 char cbuf[50] = "\n\r";
669
670 if (term_escape_char > 0 && term_escape_char < 26) {
671 snprintf(cbuf, sizeof(cbuf), "\n\r");
672 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
673 } else {
674 snprintf(cbuf, sizeof(cbuf),
675 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
676 term_escape_char);
677 }
90f998f5
DB		 678 /* XXX this blocks entire thread. Rewrite to use
679 * qemu_chr_fe_write and background I/O callbacks */
5345fdb4 680 qemu_chr_write_all(chr, (uint8_t *)cbuf, strlen(cbuf));
6f97dba0
AL		 681 for (i = 0; mux_help[i] != NULL; i++) {
682 for (j=0; mux_help[i][j] != '\0'; j++) {
683 if (mux_help[i][j] == '%')
5345fdb4 684 qemu_chr_write_all(chr, (uint8_t *)ebuf, strlen(ebuf));
6f97dba0 685 else
5345fdb4 686 qemu_chr_write_all(chr, (uint8_t *)&mux_help[i][j], 1);
6f97dba0
AL		 687 }
688 }
689}
690
0ec7b3e7 691static void mux_chr_send_event(MuxChardev *d, int mux_nr, int event)
2724b180 692{
a4afa548
MAL		 693 CharBackend *be = d->backends[mux_nr];
694
695 if (be && be->chr_event) {
696 be->chr_event(be->opaque, event);
697 }
2724b180
AL		 698}
699
0ec7b3e7 700static int mux_proc_byte(Chardev *chr, MuxChardev *d, int ch)
6f97dba0
AL		 701{
702 if (d->term_got_escape) {
703 d->term_got_escape = 0;
704 if (ch == term_escape_char)
705 goto send_char;
706 switch(ch) {
707 case '?':
708 case 'h':
709 mux_print_help(chr);
710 break;
711 case 'x':
712 {
713 const char *term = "QEMU: Terminated\n\r";
5345fdb4 714 qemu_chr_write_all(chr, (uint8_t *)term, strlen(term));
6f97dba0
AL		 715 exit(0);
716 break;
717 }
718 case 's':
da31d594 719 blk_commit_all();
6f97dba0
AL		 720 break;
721 case 'b':
a425d23f 722 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
6f97dba0
AL		 723 break;
724 case 'c':
6dfa8298 725 assert(d->mux_cnt > 0); /* handler registered with first fe */
6f97dba0 726 /* Switch to the next registered device */
fb5e19d2 727 mux_set_focus(chr, (d->focus + 1) % d->mux_cnt);
6f97dba0 728 break;
2d22959d
JK		 729 case 't':
730 d->timestamps = !d->timestamps;
731 d->timestamps_start = -1;
4ab312f7 732 d->linestart = 0;
2d22959d 733 break;
6f97dba0
AL		 734 }
735 } else if (ch == term_escape_char) {
736 d->term_got_escape = 1;
737 } else {
738 send_char:
739 return 1;
740 }
741 return 0;
742}
743
0ec7b3e7 744static void mux_chr_accept_input(Chardev *chr)
6f97dba0 745{
777357d7 746 MuxChardev *d = MUX_CHARDEV(chr);
799f1f23 747 int m = d->focus;
a4afa548 748 CharBackend *be = d->backends[m];
6f97dba0 749
a4afa548
MAL		 750 while (be && d->prod[m] != d->cons[m] &&
751 be->chr_can_read && be->chr_can_read(be->opaque)) {
752 be->chr_read(be->opaque,
753 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
6f97dba0
AL		 754 }
755}
756
757static int mux_chr_can_read(void *opaque)
758{
777357d7 759 MuxChardev *d = MUX_CHARDEV(opaque);
799f1f23 760 int m = d->focus;
a4afa548 761 CharBackend *be = d->backends[m];
6f97dba0 762
a4afa548 763 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE) {
6f97dba0 764 return 1;
a4afa548
MAL		 765 }
766
767 if (be && be->chr_can_read) {
768 return be->chr_can_read(be->opaque);
769 }
770
6f97dba0
AL		 771 return 0;
772}
773
774static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
775{
777357d7
MAL		 776 Chardev *chr = CHARDEV(opaque);
777 MuxChardev *d = MUX_CHARDEV(opaque);
799f1f23 778 int m = d->focus;
a4afa548 779 CharBackend *be = d->backends[m];
6f97dba0
AL		 780 int i;
781
a4afa548 782 mux_chr_accept_input(opaque);
6f97dba0 783
a4afa548 784 for (i = 0; i < size; i++)
6f97dba0 785 if (mux_proc_byte(chr, d, buf[i])) {
a80bf99f 786 if (d->prod[m] == d->cons[m] &&
a4afa548
MAL		 787 be && be->chr_can_read &&
788 be->chr_can_read(be->opaque))
789 be->chr_read(be->opaque, &buf[i], 1);
6f97dba0 790 else
a80bf99f 791 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
6f97dba0
AL		 792 }
793}
794
fffbd9cf
PB		 795static bool muxes_realized;
796
6f97dba0
AL		 797static void mux_chr_event(void *opaque, int event)
798{
777357d7 799 MuxChardev *d = MUX_CHARDEV(opaque);
6f97dba0
AL		 800 int i;
801
fffbd9cf
PB		 802 if (!muxes_realized) {
803 return;
804 }
805
6f97dba0
AL		 806 /* Send the event to all registered listeners */
807 for (i = 0; i < d->mux_cnt; i++)
2724b180 808 mux_chr_send_event(d, i, event);
6f97dba0
AL		 809}
810
7b7ab18d
MR		 811/**
812 * Called after processing of default and command-line-specified
813 * chardevs to deliver CHR_EVENT_OPENED events to any FEs attached
814 * to a mux chardev. This is done here to ensure that
815 * output/prompts/banners are only displayed for the FE that has
816 * focus when initial command-line processing/machine init is
817 * completed.
818 *
819 * After this point, any new FE attached to any new or existing
820 * mux will receive CHR_EVENT_OPENED notifications for the BE
821 * immediately.
822 */
823static void muxes_realize_done(Notifier *notifier, void *unused)
824{
0ec7b3e7 825 Chardev *chr;
7b7ab18d
MR		 826
827 QTAILQ_FOREACH(chr, &chardevs, next) {
777357d7
MAL		 828 if (CHARDEV_IS_MUX(chr)) {
829 MuxChardev *d = MUX_CHARDEV(chr);
7b7ab18d
MR		 830 int i;
831
832 /* send OPENED to all already-attached FEs */
833 for (i = 0; i < d->mux_cnt; i++) {
834 mux_chr_send_event(d, i, CHR_EVENT_OPENED);
835 }
836 /* mark mux as OPENED so any new FEs will immediately receive
837 * OPENED event
838 */
839 qemu_chr_be_generic_open(chr);
840 }
841 }
842 muxes_realized = true;
843}
844
845static Notifier muxes_realize_notify = {
846 .notify = muxes_realize_done,
847};
848
0ec7b3e7 849static GSource *mux_chr_add_watch(Chardev *s, GIOCondition cond)
3f0838ab 850{
777357d7 851 MuxChardev *d = MUX_CHARDEV(s);
0ec7b3e7 852 Chardev *chr = qemu_chr_fe_get_driver(&d->chr);
777357d7 853 ChardevClass *cc = CHARDEV_GET_CLASS(chr);
5345fdb4 854
777357d7 855 if (!cc->chr_add_watch) {
b68e956a
MAL		 856 return NULL;
857 }
858
777357d7 859 return cc->chr_add_watch(chr, cond);
3f0838ab
KB		 860}
861
0ec7b3e7 862static void mux_chr_free(struct Chardev *chr)
1371a369 863{
777357d7 864 MuxChardev *d = MUX_CHARDEV(chr);
a4afa548 865 int i;
1371a369 866
a4afa548
MAL		 867 for (i = 0; i < d->mux_cnt; i++) {
868 CharBackend *be = d->backends[i];
869 if (be) {
870 be->chr = NULL;
871 }
872 }
c39860e6 873 qemu_chr_fe_deinit(&d->chr);
1371a369
MAL		 874}
875
0ec7b3e7 876static void mux_chr_set_handlers(Chardev *chr, GMainContext *context)
6dfa8298 877{
777357d7 878 MuxChardev *d = MUX_CHARDEV(chr);
6dfa8298
MAL		 879
880 /* Fix up the real driver with mux routines */
ecb672d1
MAL		 881 qemu_chr_fe_set_handlers(&d->chr,
882 mux_chr_can_read,
883 mux_chr_read,
884 mux_chr_event,
885 chr,
39ab61c6 886 context, true);
6dfa8298
MAL		 887}
888
0ec7b3e7 889static void mux_set_focus(Chardev *chr, int focus)
6dfa8298 890{
777357d7 891 MuxChardev *d = MUX_CHARDEV(chr);
fb5e19d2 892
6dfa8298
MAL		 893 assert(focus >= 0);
894 assert(focus < d->mux_cnt);
895
896 if (d->focus != -1) {
897 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
898 }
899
900 d->focus = focus;
fb5e19d2 901 chr->be = d->backends[focus];
6dfa8298
MAL		 902 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
903}
904
777357d7
MAL		 905static void qemu_chr_open_mux(Chardev *chr,
906 ChardevBackend *backend,
907 bool *be_opened,
908 Error **errp)
6f97dba0 909{
32bafa8f 910 ChardevMux *mux = backend->u.mux.data;
777357d7
MAL		 911 Chardev *drv;
912 MuxChardev *d = MUX_CHARDEV(chr);
6f97dba0 913
3c0e5a4a
PB		 914 drv = qemu_chr_find(mux->chardev);
915 if (drv == NULL) {
916 error_setg(errp, "mux: base chardev %s not found", mux->chardev);
777357d7 917 return;
3c0e5a4a
PB		 918 }
919
799f1f23 920 d->focus = -1;
7b7ab18d
MR		 921 /* only default to opened state if we've realized the initial
922 * set of muxes
923 */
82878dac 924 *be_opened = muxes_realized;
777357d7 925 qemu_chr_fe_init(&d->chr, drv, errp);
6f97dba0
AL		 926}
927
0ec7b3e7 928Chardev *qemu_chr_fe_get_driver(CharBackend *be)
94a40fc5
MAL		 929{
930 return be->chr;
931}
932
0ec7b3e7 933bool qemu_chr_fe_init(CharBackend *b, Chardev *s, Error **errp)
94a40fc5
MAL		 934{
935 int tag = 0;
936
777357d7
MAL		 937 if (CHARDEV_IS_MUX(s)) {
938 MuxChardev *d = MUX_CHARDEV(s);
3aef23d7
MAL		 939
940 if (d->mux_cnt >= MAX_MUX) {
941 goto unavailable;
94a40fc5 942 }
3aef23d7
MAL		 943
944 d->backends[d->mux_cnt] = b;
945 tag = d->mux_cnt++;
946 } else if (s->be) {
947 goto unavailable;
a4afa548
MAL		 948 } else {
949 s->be = b;
94a40fc5
MAL		 950 }
951
830896af 952 b->fe_open = false;
94a40fc5
MAL		 953 b->tag = tag;
954 b->chr = s;
94a40fc5 955 return true;
3aef23d7
MAL		 956
957unavailable:
958 error_setg(errp, QERR_DEVICE_IN_USE, s->label);
959 return false;
94a40fc5
MAL		 960}
961
0ec7b3e7 962static bool qemu_chr_is_busy(Chardev *s)
a4afa548 963{
777357d7
MAL		 964 if (CHARDEV_IS_MUX(s)) {
965 MuxChardev *d = MUX_CHARDEV(s);
a4afa548
MAL		 966 return d->mux_cnt >= 0;
967 } else {
968 return s->be != NULL;
969 }
970}
971
c39860e6
MAL		 972void qemu_chr_fe_deinit(CharBackend *b)
973{
974 assert(b);
975
976 if (b->chr) {
39ab61c6 977 qemu_chr_fe_set_handlers(b, NULL, NULL, NULL, NULL, NULL, true);
fb5e19d2
MAL		 978 if (b->chr->be == b) {
979 b->chr->be = NULL;
980 }
777357d7
MAL		 981 if (CHARDEV_IS_MUX(b->chr)) {
982 MuxChardev *d = MUX_CHARDEV(b->chr);
a4afa548
MAL		 983 d->backends[b->tag] = NULL;
984 }
c39860e6
MAL		 985 b->chr = NULL;
986 }
987}
988
94a40fc5
MAL		 989void qemu_chr_fe_set_handlers(CharBackend *b,
990 IOCanReadHandler *fd_can_read,
991 IOReadHandler *fd_read,
992 IOEventHandler *fd_event,
993 void *opaque,
39ab61c6
MAL		 994 GMainContext *context,
995 bool set_open)
94a40fc5 996{
0ec7b3e7 997 Chardev *s;
777357d7 998 ChardevClass *cc;
386f07d1
MAL		 999 int fe_open;
1000
1001 s = b->chr;
1002 if (!s) {
94a40fc5
MAL		 1003 return;
1004 }
1005
777357d7 1006 cc = CHARDEV_GET_CLASS(s);
386f07d1
MAL		 1007 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
1008 fe_open = 0;
1009 remove_fd_in_watch(s);
1010 } else {
1011 fe_open = 1;
1012 }
a4afa548
MAL		 1013 b->chr_can_read = fd_can_read;
1014 b->chr_read = fd_read;
1015 b->chr_event = fd_event;
1016 b->opaque = opaque;
777357d7
MAL		 1017 if (cc->chr_update_read_handler) {
1018 cc->chr_update_read_handler(s, context);
386f07d1
MAL		 1019 }
1020
39ab61c6 1021 if (set_open) {
386f07d1
MAL		 1022 qemu_chr_fe_set_open(b, fe_open);
1023 }
94a40fc5 1024
386f07d1
MAL		 1025 if (fe_open) {
1026 qemu_chr_fe_take_focus(b);
1027 /* We're connecting to an already opened device, so let's make sure we
1028 also get the open event */
1029 if (s->be_open) {
1030 qemu_chr_be_generic_open(s);
1031 }
1032 }
1033
777357d7 1034 if (CHARDEV_IS_MUX(s)) {
386f07d1 1035 mux_chr_set_handlers(s, context);
94a40fc5
MAL		 1036 }
1037}
1038
1039void qemu_chr_fe_take_focus(CharBackend *b)
1040{
fa394ed6
MAL		 1041 if (!b->chr) {
1042 return;
1043 }
1044
777357d7 1045 if (CHARDEV_IS_MUX(b->chr)) {
fb5e19d2 1046 mux_set_focus(b->chr, b->tag);
94a40fc5
MAL		 1047 }
1048}
6f97dba0 1049
96c63847
AL		 1050typedef struct IOWatchPoll
1051{
d185c094
PB		 1052 GSource parent;
1053
9894dc0c 1054 QIOChannel *ioc;
96c63847 1055 GSource *src;
96c63847
AL		 1056
1057 IOCanReadHandler *fd_can_read;
1e885b25 1058 GSourceFunc fd_read;
96c63847 1059 void *opaque;
e92aa36a 1060 GMainContext *context;
96c63847
AL		 1061} IOWatchPoll;
1062
96c63847
AL		 1063static IOWatchPoll *io_watch_poll_from_source(GSource *source)
1064{
d185c094 1065 return container_of(source, IOWatchPoll, parent);
96c63847
AL		 1066}
1067
e92aa36a
ZC		 1068static gboolean io_watch_poll_prepare(GSource *source,
1069 gint *timeout_)
96c63847
AL		 1070{
1071 IOWatchPoll *iwp = io_watch_poll_from_source(source);
d185c094 1072 bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
1e885b25 1073 bool was_active = iwp->src != NULL;
d185c094 1074 if (was_active == now_active) {
96c63847
AL		 1075 return FALSE;
1076 }
1077
d185c094 1078 if (now_active) {
9894dc0c
DB		 1079 iwp->src = qio_channel_create_watch(
1080 iwp->ioc, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL);
1e885b25 1081 g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL);
e92aa36a 1082 g_source_attach(iwp->src, iwp->context);
d185c094 1083 } else {
1e885b25
PB		 1084 g_source_destroy(iwp->src);
1085 g_source_unref(iwp->src);
1086 iwp->src = NULL;
d185c094
PB		 1087 }
1088 return FALSE;
96c63847
AL		 1089}
1090
1091static gboolean io_watch_poll_check(GSource *source)
1092{
d185c094 1093 return FALSE;
96c63847
AL		 1094}
1095
1096static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
1097 gpointer user_data)
1098{
d185c094 1099 abort();
96c63847
AL		 1100}
1101
1102static void io_watch_poll_finalize(GSource *source)
1103{
2b316774
PB		 1104 /* Due to a glib bug, removing the last reference to a source
1105 * inside a finalize callback causes recursive locking (and a
1106 * deadlock). This is not a problem inside other callbacks,
1107 * including dispatch callbacks, so we call io_remove_watch_poll
1108 * to remove this source. At this point, iwp->src must
1109 * be NULL, or we would leak it.
1110 *
1111 * This would be solved much more elegantly by child sources,
1112 * but we support older glib versions that do not have them.
1113 */
96c63847 1114 IOWatchPoll *iwp = io_watch_poll_from_source(source);
2b316774 1115 assert(iwp->src == NULL);
96c63847
AL		 1116}
1117
1118static GSourceFuncs io_watch_poll_funcs = {
1119 .prepare = io_watch_poll_prepare,
1120 .check = io_watch_poll_check,
1121 .dispatch = io_watch_poll_dispatch,
1122 .finalize = io_watch_poll_finalize,
1123};
1124
1125/* Can only be used for read */
0ec7b3e7 1126static guint io_add_watch_poll(Chardev *chr,
e93a68e1 1127 QIOChannel *ioc,
96c63847 1128 IOCanReadHandler *fd_can_read,
9894dc0c 1129 QIOChannelFunc fd_read,
e92aa36a
ZC		 1130 gpointer user_data,
1131 GMainContext *context)
96c63847
AL		 1132{
1133 IOWatchPoll *iwp;
0ca5aa4f 1134 int tag;
e93a68e1 1135 char *name;
96c63847 1136
e92aa36a
ZC		 1137 iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs,
1138 sizeof(IOWatchPoll));
96c63847
AL		 1139 iwp->fd_can_read = fd_can_read;
1140 iwp->opaque = user_data;
9894dc0c 1141 iwp->ioc = ioc;
1e885b25
PB		 1142 iwp->fd_read = (GSourceFunc) fd_read;
1143 iwp->src = NULL;
e92aa36a 1144 iwp->context = context;
96c63847 1145
e93a68e1
DB		 1146 name = g_strdup_printf("chardev-iowatch-%s", chr->label);
1147 g_source_set_name((GSource *)iwp, name);
1148 g_free(name);
1149
e92aa36a 1150 tag = g_source_attach(&iwp->parent, context);
0ca5aa4f
PB		 1151 g_source_unref(&iwp->parent);
1152 return tag;
96c63847
AL		 1153}
1154
2b316774
PB		 1155static void io_remove_watch_poll(guint tag)
1156{
1157 GSource *source;
1158 IOWatchPoll *iwp;
1159
1160 g_return_if_fail (tag > 0);
1161
1162 source = g_main_context_find_source_by_id(NULL, tag);
1163 g_return_if_fail (source != NULL);
1164
1165 iwp = io_watch_poll_from_source(source);
1166 if (iwp->src) {
1167 g_source_destroy(iwp->src);
1168 g_source_unref(iwp->src);
1169 iwp->src = NULL;
1170 }
1171 g_source_destroy(&iwp->parent);
1172}
1173
0ec7b3e7 1174static void remove_fd_in_watch(Chardev *chr)
26da70c7
AS		 1175{
1176 if (chr->fd_in_tag) {
1177 io_remove_watch_poll(chr->fd_in_tag);
1178 chr->fd_in_tag = 0;
1179 }
1180}
1181
96c63847 1182
9894dc0c
DB		 1183static int io_channel_send_full(QIOChannel *ioc,
1184 const void *buf, size_t len,
1185 int *fds, size_t nfds)
76a9644b 1186{
9894dc0c 1187 size_t offset = 0;
76a9644b 1188
9894dc0c
DB		 1189 while (offset < len) {
1190 ssize_t ret = 0;
1191 struct iovec iov = { .iov_base = (char *)buf + offset,
1192 .iov_len = len - offset };
1193
1194 ret = qio_channel_writev_full(
1195 ioc, &iov, 1,
1196 fds, nfds, NULL);
1197 if (ret == QIO_CHANNEL_ERR_BLOCK) {
9894dc0c
DB		 1198 if (offset) {
1199 return offset;
1200 }
76a9644b 1201
e046fb44
DB		 1202 errno = EAGAIN;
1203 return -1;
1204 } else if (ret < 0) {
9894dc0c
DB		 1205 errno = EINVAL;
1206 return -1;
1207 }
76a9644b 1208
9894dc0c
DB		 1209 offset += ret;
1210 }
76a9644b 1211
9894dc0c 1212 return offset;
76a9644b
AL		 1213}
1214
9894dc0c 1215
0ff0fad2 1216#ifndef _WIN32
9894dc0c 1217static int io_channel_send(QIOChannel *ioc, const void *buf, size_t len)
96c63847 1218{
9894dc0c 1219 return io_channel_send_full(ioc, buf, len, NULL, 0);
96c63847 1220}
96c63847 1221
0ec7b3e7
MAL		 1222typedef struct FDChardev {
1223 Chardev parent;
1224 Chardev *chr;
9894dc0c 1225 QIOChannel *ioc_in, *ioc_out;
6f97dba0 1226 int max_size;
0ec7b3e7 1227} FDChardev;
6f97dba0 1228
777357d7
MAL		 1229#define TYPE_CHARDEV_FD "chardev-fd"
1230#define FD_CHARDEV(obj) OBJECT_CHECK(FDChardev, (obj), TYPE_CHARDEV_FD)
1231
9005b2a7 1232/* Called with chr_write_lock held. */
0ec7b3e7 1233static int fd_chr_write(Chardev *chr, const uint8_t *buf, int len)
6f97dba0 1234{
777357d7 1235 FDChardev *s = FD_CHARDEV(chr);
41ac54b2 1236
9894dc0c 1237 return io_channel_send(s->ioc_out, buf, len);
6f97dba0
AL		 1238}
1239
9894dc0c 1240static gboolean fd_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
6f97dba0 1241{
777357d7
MAL		 1242 Chardev *chr = CHARDEV(opaque);
1243 FDChardev *s = FD_CHARDEV(opaque);
a29753f8 1244 int len;
9bd7854e 1245 uint8_t buf[READ_BUF_LEN];
9894dc0c 1246 ssize_t ret;
6f97dba0
AL		 1247
1248 len = sizeof(buf);
a29753f8 1249 if (len > s->max_size) {
6f97dba0 1250 len = s->max_size;
a29753f8
AL		 1251 }
1252 if (len == 0) {
cdbf6e16 1253 return TRUE;
a29753f8
AL		 1254 }
1255
9894dc0c
DB		 1256 ret = qio_channel_read(
1257 chan, (gchar *)buf, len, NULL);
1258 if (ret == 0) {
26da70c7 1259 remove_fd_in_watch(chr);
a425d23f 1260 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
a29753f8 1261 return FALSE;
6f97dba0 1262 }
9894dc0c
DB		 1263 if (ret > 0) {
1264 qemu_chr_be_write(chr, buf, ret);
6f97dba0 1265 }
a29753f8
AL		 1266
1267 return TRUE;
1268}
1269
1270static int fd_chr_read_poll(void *opaque)
1271{
777357d7
MAL		 1272 Chardev *chr = CHARDEV(opaque);
1273 FDChardev *s = FD_CHARDEV(opaque);
a29753f8
AL		 1274
1275 s->max_size = qemu_chr_be_can_write(chr);
1276 return s->max_size;
6f97dba0
AL		 1277}
1278
0ec7b3e7 1279static GSource *fd_chr_add_watch(Chardev *chr, GIOCondition cond)
23673ca7 1280{
777357d7 1281 FDChardev *s = FD_CHARDEV(chr);
9894dc0c 1282 return qio_channel_create_watch(s->ioc_out, cond);
23673ca7
AL		 1283}
1284
0ec7b3e7 1285static void fd_chr_update_read_handler(Chardev *chr,
a4afa548 1286 GMainContext *context)
6f97dba0 1287{
777357d7 1288 FDChardev *s = FD_CHARDEV(chr);
6f97dba0 1289
26da70c7 1290 remove_fd_in_watch(chr);
9894dc0c 1291 if (s->ioc_in) {
e93a68e1 1292 chr->fd_in_tag = io_add_watch_poll(chr, s->ioc_in,
9894dc0c 1293 fd_chr_read_poll,
e92aa36a
ZC		 1294 fd_chr_read, chr,
1295 context);
6f97dba0
AL		 1296 }
1297}
1298
0ec7b3e7 1299static void fd_chr_free(struct Chardev *chr)
6f97dba0 1300{
777357d7 1301 FDChardev *s = FD_CHARDEV(chr);
6f97dba0 1302
26da70c7 1303 remove_fd_in_watch(chr);
9894dc0c
DB		 1304 if (s->ioc_in) {
1305 object_unref(OBJECT(s->ioc_in));
a29753f8 1306 }
9894dc0c
DB		 1307 if (s->ioc_out) {
1308 object_unref(OBJECT(s->ioc_out));
6f97dba0
AL		 1309 }
1310
a425d23f 1311 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
6f97dba0
AL		 1312}
1313
1314/* open a character device to a unix fd */
777357d7
MAL		 1315static void qemu_chr_open_fd(Chardev *chr,
1316 int fd_in, int fd_out)
6f97dba0 1317{
777357d7 1318 FDChardev *s = FD_CHARDEV(chr);
e93a68e1 1319 char *name;
6f97dba0 1320
9894dc0c 1321 s->ioc_in = QIO_CHANNEL(qio_channel_file_new_fd(fd_in));
e93a68e1
DB		 1322 name = g_strdup_printf("chardev-file-in-%s", chr->label);
1323 qio_channel_set_name(QIO_CHANNEL(s->ioc_in), name);
1324 g_free(name);
9894dc0c 1325 s->ioc_out = QIO_CHANNEL(qio_channel_file_new_fd(fd_out));
e93a68e1
DB		 1326 name = g_strdup_printf("chardev-file-out-%s", chr->label);
1327 qio_channel_set_name(QIO_CHANNEL(s->ioc_out), name);
1328 g_free(name);
4ff12bdb 1329 qemu_set_nonblock(fd_out);
a29753f8 1330 s->chr = chr;
777357d7 1331}
6f97dba0 1332
777357d7
MAL		 1333static void char_fd_class_init(ObjectClass *oc, void *data)
1334{
1335 ChardevClass *cc = CHARDEV_CLASS(oc);
1336
1337 cc->chr_add_watch = fd_chr_add_watch;
1338 cc->chr_write = fd_chr_write;
1339 cc->chr_update_read_handler = fd_chr_update_read_handler;
1340 cc->chr_free = fd_chr_free;
6f97dba0
AL		 1341}
1342
777357d7
MAL		 1343static const TypeInfo char_fd_type_info = {
1344 .name = TYPE_CHARDEV_FD,
1345 .parent = TYPE_CHARDEV,
1346 .instance_size = sizeof(FDChardev),
1347 .class_init = char_fd_class_init,
1348 .abstract = true,
1349};
1350
1351static void qemu_chr_open_pipe(Chardev *chr,
1352 ChardevBackend *backend,
1353 bool *be_opened,
1354 Error **errp)
6f97dba0 1355{
32bafa8f 1356 ChardevHostdev *opts = backend->u.pipe.data;
6f97dba0 1357 int fd_in, fd_out;
0ff0fad2
DB		 1358 char *filename_in;
1359 char *filename_out;
548cbb36 1360 const char *filename = opts->device;
0ff0fad2
DB		 1361
1362 filename_in = g_strdup_printf("%s.in", filename);
1363 filename_out = g_strdup_printf("%s.out", filename);
40ff6d7e
KW		 1364 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
1365 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
0ff0fad2
DB		 1366 g_free(filename_in);
1367 g_free(filename_out);
6f97dba0
AL		 1368 if (fd_in < 0 || fd_out < 0) {
1369 if (fd_in >= 0)
1370 close(fd_in);
1371 if (fd_out >= 0)
1372 close(fd_out);
b181e047 1373 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
a89dd6c3 1374 if (fd_in < 0) {
20cbe7a2 1375 error_setg_file_open(errp, errno, filename);
777357d7 1376 return;
a89dd6c3 1377 }
6f97dba0 1378 }
777357d7 1379 qemu_chr_open_fd(chr, fd_in, fd_out);
6f97dba0
AL		 1380}
1381
6f97dba0
AL		 1382/* init terminal so that we can grab keys */
1383static struct termios oldtty;
1384static int old_fd0_flags;
c88930a6 1385static bool stdio_in_use;
bb002513 1386static bool stdio_allow_signal;
e76d4420
GH		 1387static bool stdio_echo_state;
1388
0ec7b3e7 1389static void qemu_chr_set_echo_stdio(Chardev *chr, bool echo);
6f97dba0
AL		 1390
1391static void term_exit(void)
1392{
1393 tcsetattr (0, TCSANOW, &oldtty);
1394 fcntl(0, F_SETFL, old_fd0_flags);
1395}
1396
e76d4420
GH		 1397static void term_stdio_handler(int sig)
1398{
1399 /* restore echo after resume from suspend. */
1400 qemu_chr_set_echo_stdio(NULL, stdio_echo_state);
1401}
1402
0ec7b3e7 1403static void qemu_chr_set_echo_stdio(Chardev *chr, bool echo)
6f97dba0
AL		 1404{
1405 struct termios tty;
1406
e76d4420 1407 stdio_echo_state = echo;
0369364b 1408 tty = oldtty;
bb002513
PB		 1409 if (!echo) {
1410 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
6f97dba0 1411 |INLCR|IGNCR|ICRNL|IXON);
bb002513
PB		 1412 tty.c_oflag |= OPOST;
1413 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
1414 tty.c_cflag &= ~(CSIZE|PARENB);
1415 tty.c_cflag |= CS8;
1416 tty.c_cc[VMIN] = 1;
1417 tty.c_cc[VTIME] = 0;
1418 }
bb002513 1419 if (!stdio_allow_signal)
6f97dba0 1420 tty.c_lflag &= ~ISIG;
6f97dba0
AL		 1421
1422 tcsetattr (0, TCSANOW, &tty);
6f97dba0
AL		 1423}
1424
0ec7b3e7 1425static void qemu_chr_free_stdio(struct Chardev *chr)
6f97dba0
AL		 1426{
1427 term_exit();
72ac8762 1428 fd_chr_free(chr);
6f97dba0
AL		 1429}
1430
777357d7
MAL		 1431static void qemu_chr_open_stdio(Chardev *chr,
1432 ChardevBackend *backend,
1433 bool *be_opened,
1434 Error **errp)
6f97dba0 1435{
32bafa8f 1436 ChardevStdio *opts = backend->u.stdio.data;
e76d4420 1437 struct sigaction act;
6f97dba0 1438
ab51b1d5 1439 if (is_daemonized()) {
8c84b25d 1440 error_setg(errp, "cannot use stdio with -daemonize");
777357d7 1441 return;
ab51b1d5 1442 }
c88930a6
LL		 1443
1444 if (stdio_in_use) {
8c84b25d 1445 error_setg(errp, "cannot use stdio by multiple character devices");
777357d7 1446 return;
c88930a6
LL		 1447 }
1448
1449 stdio_in_use = true;
ed7a1540 1450 old_fd0_flags = fcntl(0, F_GETFL);
c88930a6 1451 tcgetattr(0, &oldtty);
4ff12bdb 1452 qemu_set_nonblock(0);
ed7a1540 1453 atexit(term_exit);
0369364b 1454
e76d4420
GH		 1455 memset(&act, 0, sizeof(act));
1456 act.sa_handler = term_stdio_handler;
1457 sigaction(SIGCONT, &act, NULL);
1458
777357d7
MAL		 1459 qemu_chr_open_fd(chr, 0, 1);
1460
7c358031
GH		 1461 if (opts->has_signal) {
1462 stdio_allow_signal = opts->signal;
1463 }
5345fdb4 1464 qemu_chr_set_echo_stdio(chr, false);
6f97dba0
AL		 1465}
1466
6f97dba0 1467#if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
a167ba50
AJ		 1468 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
1469 || defined(__GLIBC__)
6f97dba0 1470
d809ab95
PB		 1471#define HAVE_CHARDEV_SERIAL 1
1472#define HAVE_CHARDEV_PTY 1
e551498e 1473
6f97dba0 1474typedef struct {
0ec7b3e7 1475 Chardev parent;
9894dc0c 1476 QIOChannel *ioc;
6f97dba0 1477 int read_bytes;
9005b2a7 1478
0ec7b3e7 1479 /* Protected by the Chardev chr_write_lock. */
9005b2a7 1480 int connected;
8aa33caf 1481 guint timer_tag;
7b3621f4 1482 guint open_tag;
0ec7b3e7 1483} PtyChardev;
6f97dba0 1484
777357d7
MAL		 1485#define PTY_CHARDEV(obj) OBJECT_CHECK(PtyChardev, (obj), TYPE_CHARDEV_PTY)
1486
0ec7b3e7
MAL		 1487static void pty_chr_update_read_handler_locked(Chardev *chr);
1488static void pty_chr_state(Chardev *chr, int connected);
6f97dba0 1489
8aa33caf
AL		 1490static gboolean pty_chr_timer(gpointer opaque)
1491{
777357d7
MAL		 1492 struct Chardev *chr = CHARDEV(opaque);
1493 PtyChardev *s = PTY_CHARDEV(opaque);
8aa33caf 1494
9005b2a7 1495 qemu_mutex_lock(&chr->chr_write_lock);
79f20075 1496 s->timer_tag = 0;
7b3621f4 1497 s->open_tag = 0;
b0d768c3
GH		 1498 if (!s->connected) {
1499 /* Next poll ... */
9005b2a7 1500 pty_chr_update_read_handler_locked(chr);
b0d768c3 1501 }
9005b2a7 1502 qemu_mutex_unlock(&chr->chr_write_lock);
8aa33caf
AL		 1503 return FALSE;
1504}
1505
9005b2a7 1506/* Called with chr_write_lock held. */
0ec7b3e7 1507static void pty_chr_rearm_timer(Chardev *chr, int ms)
8aa33caf 1508{
777357d7 1509 PtyChardev *s = PTY_CHARDEV(chr);
e93a68e1 1510 char *name;
8aa33caf
AL		 1511
1512 if (s->timer_tag) {
1513 g_source_remove(s->timer_tag);
1514 s->timer_tag = 0;
1515 }
1516
1517 if (ms == 1000) {
e93a68e1 1518 name = g_strdup_printf("pty-timer-secs-%s", chr->label);
8aa33caf
AL		 1519 s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
1520 } else {
e93a68e1 1521 name = g_strdup_printf("pty-timer-ms-%s", chr->label);
8aa33caf
AL		 1522 s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
1523 }
e93a68e1
DB		 1524 g_source_set_name_by_id(s->timer_tag, name);
1525 g_free(name);
8aa33caf
AL		 1526}
1527
9005b2a7 1528/* Called with chr_write_lock held. */
0ec7b3e7 1529static void pty_chr_update_read_handler_locked(Chardev *chr)
1bb7fe72 1530{
777357d7 1531 PtyChardev *s = PTY_CHARDEV(chr);
1bb7fe72 1532 GPollFD pfd;
c1f24489 1533 int rc;
9894dc0c 1534 QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc);
1bb7fe72 1535
9894dc0c 1536 pfd.fd = fioc->fd;
1bb7fe72
PB		 1537 pfd.events = G_IO_OUT;
1538 pfd.revents = 0;
c1f24489
PB		 1539 do {
1540 rc = g_poll(&pfd, 1, 0);
1541 } while (rc == -1 && errno == EINTR);
1542 assert(rc >= 0);
1543
1bb7fe72
PB		 1544 if (pfd.revents & G_IO_HUP) {
1545 pty_chr_state(chr, 0);
1546 } else {
1547 pty_chr_state(chr, 1);
1548 }
1549}
1550
0ec7b3e7 1551static void pty_chr_update_read_handler(Chardev *chr,
a4afa548 1552 GMainContext *context)
9005b2a7
PB		 1553{
1554 qemu_mutex_lock(&chr->chr_write_lock);
1555 pty_chr_update_read_handler_locked(chr);
1556 qemu_mutex_unlock(&chr->chr_write_lock);
1557}
1558
1559/* Called with chr_write_lock held. */
777357d7 1560static int char_pty_chr_write(Chardev *chr, const uint8_t *buf, int len)
6f97dba0 1561{
777357d7 1562 PtyChardev *s = PTY_CHARDEV(chr);
6f97dba0
AL		 1563
1564 if (!s->connected) {
1565 /* guest sends data, check for (re-)connect */
9005b2a7 1566 pty_chr_update_read_handler_locked(chr);
cf7330c7
ST		 1567 if (!s->connected) {
1568 return 0;
1569 }
6f97dba0 1570 }
9894dc0c 1571 return io_channel_send(s->ioc, buf, len);
6f97dba0
AL		 1572}
1573
0ec7b3e7 1574static GSource *pty_chr_add_watch(Chardev *chr, GIOCondition cond)
e6a87ed8 1575{
777357d7 1576 PtyChardev *s = PTY_CHARDEV(chr);
62c339c5
PB		 1577 if (!s->connected) {
1578 return NULL;
1579 }
9894dc0c 1580 return qio_channel_create_watch(s->ioc, cond);
e6a87ed8
AL		 1581}
1582
6f97dba0
AL		 1583static int pty_chr_read_poll(void *opaque)
1584{
777357d7
MAL		 1585 Chardev *chr = CHARDEV(opaque);
1586 PtyChardev *s = PTY_CHARDEV(opaque);
6f97dba0 1587
909cda12 1588 s->read_bytes = qemu_chr_be_can_write(chr);
6f97dba0
AL		 1589 return s->read_bytes;
1590}
1591
9894dc0c 1592static gboolean pty_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
6f97dba0 1593{
777357d7
MAL		 1594 Chardev *chr = CHARDEV(opaque);
1595 PtyChardev *s = PTY_CHARDEV(opaque);
9894dc0c 1596 gsize len;
9bd7854e 1597 uint8_t buf[READ_BUF_LEN];
9894dc0c 1598 ssize_t ret;
6f97dba0
AL		 1599
1600 len = sizeof(buf);
1601 if (len > s->read_bytes)
1602 len = s->read_bytes;
cdbf6e16
PB		 1603 if (len == 0) {
1604 return TRUE;
1605 }
9894dc0c
DB		 1606 ret = qio_channel_read(s->ioc, (char *)buf, len, NULL);
1607 if (ret <= 0) {
6f97dba0 1608 pty_chr_state(chr, 0);
093d3a20
AL		 1609 return FALSE;
1610 } else {
6f97dba0 1611 pty_chr_state(chr, 1);
9894dc0c 1612 qemu_chr_be_write(chr, buf, ret);
6f97dba0 1613 }
093d3a20 1614 return TRUE;
6f97dba0
AL		 1615}
1616
7b3621f4
PB		 1617static gboolean qemu_chr_be_generic_open_func(gpointer opaque)
1618{
777357d7
MAL		 1619 Chardev *chr = CHARDEV(opaque);
1620 PtyChardev *s = PTY_CHARDEV(opaque);
7b3621f4
PB		 1621
1622 s->open_tag = 0;
1623 qemu_chr_be_generic_open(chr);
1624 return FALSE;
1625}
1626
9005b2a7 1627/* Called with chr_write_lock held. */
0ec7b3e7 1628static void pty_chr_state(Chardev *chr, int connected)
6f97dba0 1629{
777357d7 1630 PtyChardev *s = PTY_CHARDEV(chr);
6f97dba0
AL		 1631
1632 if (!connected) {
7b3621f4
PB		 1633 if (s->open_tag) {
1634 g_source_remove(s->open_tag);
1635 s->open_tag = 0;
1636 }
26da70c7 1637 remove_fd_in_watch(chr);
6f97dba0 1638 s->connected = 0;
6f97dba0
AL		 1639 /* (re-)connect poll interval for idle guests: once per second.
1640 * We check more frequently in case the guests sends data to
1641 * the virtual device linked to our pty. */
8aa33caf 1642 pty_chr_rearm_timer(chr, 1000);
6f97dba0 1643 } else {
85a67692
PB		 1644 if (s->timer_tag) {
1645 g_source_remove(s->timer_tag);
1646 s->timer_tag = 0;
1647 }
1648 if (!s->connected) {
7b3621f4 1649 g_assert(s->open_tag == 0);
85a67692 1650 s->connected = 1;
7b3621f4 1651 s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, chr);
ac1b84dd
GH		 1652 }
1653 if (!chr->fd_in_tag) {
e93a68e1 1654 chr->fd_in_tag = io_add_watch_poll(chr, s->ioc,
9894dc0c 1655 pty_chr_read_poll,
e92aa36a
ZC		 1656 pty_chr_read,
1657 chr, NULL);
85a67692 1658 }
6f97dba0
AL		 1659 }
1660}
1661
0ec7b3e7 1662static void pty_chr_free(struct Chardev *chr)
6f97dba0 1663{
777357d7 1664 PtyChardev *s = PTY_CHARDEV(chr);
6f97dba0 1665
7b3621f4
PB		 1666 qemu_mutex_lock(&chr->chr_write_lock);
1667 pty_chr_state(chr, 0);
9894dc0c 1668 object_unref(OBJECT(s->ioc));
8aa33caf
AL		 1669 if (s->timer_tag) {
1670 g_source_remove(s->timer_tag);
910b6368 1671 s->timer_tag = 0;
8aa33caf 1672 }
7b3621f4 1673 qemu_mutex_unlock(&chr->chr_write_lock);
a425d23f 1674 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
6f97dba0
AL		 1675}
1676
777357d7
MAL		 1677static void char_pty_open(Chardev *chr,
1678 ChardevBackend *backend,
1679 bool *be_opened,
1680 Error **errp)
6f97dba0 1681{
0ec7b3e7 1682 PtyChardev *s;
e68c5958 1683 int master_fd, slave_fd;
6f97dba0 1684 char pty_name[PATH_MAX];
e93a68e1 1685 char *name;
6f97dba0 1686
4efeabbb
MT		 1687 master_fd = qemu_openpty_raw(&slave_fd, pty_name);
1688 if (master_fd < 0) {
c2e75a43 1689 error_setg_errno(errp, errno, "Failed to create PTY");
777357d7 1690 return;
6f97dba0
AL		 1691 }
1692
837a183f 1693 close(slave_fd);
fac6688a 1694 qemu_set_nonblock(master_fd);
6f97dba0 1695
4efeabbb 1696 chr->filename = g_strdup_printf("pty:%s", pty_name);
776a32a0 1697 error_report("char device redirected to %s (label %s)",
777357d7 1698 pty_name, chr->label);
6f97dba0 1699
777357d7 1700 s = PTY_CHARDEV(chr);
9894dc0c 1701 s->ioc = QIO_CHANNEL(qio_channel_file_new_fd(master_fd));
e93a68e1
DB		 1702 name = g_strdup_printf("chardev-pty-%s", chr->label);
1703 qio_channel_set_name(QIO_CHANNEL(s->ioc), name);
1704 g_free(name);
8aa33caf 1705 s->timer_tag = 0;
41ac54b2 1706 *be_opened = false;
6f97dba0
AL		 1707}
1708
b68e956a
MAL		 1709static const CharDriver pty_driver = {
1710 .kind = CHARDEV_BACKEND_KIND_PTY,
777357d7
MAL		 1711};
1712
1713static void char_pty_class_init(ObjectClass *oc, void *data)
1714{
1715 ChardevClass *cc = CHARDEV_CLASS(oc);
1716
1717 cc->open = char_pty_open;
1718 cc->chr_write = char_pty_chr_write;
1719 cc->chr_update_read_handler = pty_chr_update_read_handler;
1720 cc->chr_add_watch = pty_chr_add_watch;
1721 cc->chr_free = pty_chr_free;
1722}
1723
1724static const TypeInfo char_pty_type_info = {
1725 .name = TYPE_CHARDEV_PTY,
1726 .parent = TYPE_CHARDEV,
1727 .instance_size = sizeof(PtyChardev),
1728 .class_init = char_pty_class_init,
b68e956a
MAL		 1729};
1730
6f97dba0
AL		 1731static void tty_serial_init(int fd, int speed,
1732 int parity, int data_bits, int stop_bits)
1733{
1734 struct termios tty;
1735 speed_t spd;
1736
1737#if 0
1738 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1739 speed, parity, data_bits, stop_bits);
1740#endif
1741 tcgetattr (fd, &tty);
1742
45eea13b
SW		 1743#define check_speed(val) if (speed <= val) { spd = B##val; break; }
1744 speed = speed * 10 / 11;
1745 do {
1746 check_speed(50);
1747 check_speed(75);
1748 check_speed(110);
1749 check_speed(134);
1750 check_speed(150);
1751 check_speed(200);
1752 check_speed(300);
1753 check_speed(600);
1754 check_speed(1200);
1755 check_speed(1800);
1756 check_speed(2400);
1757 check_speed(4800);
1758 check_speed(9600);
1759 check_speed(19200);
1760 check_speed(38400);
1761 /* Non-Posix values follow. They may be unsupported on some systems. */
1762 check_speed(57600);
1763 check_speed(115200);
1764#ifdef B230400
1765 check_speed(230400);
1766#endif
1767#ifdef B460800
1768 check_speed(460800);
1769#endif
1770#ifdef B500000
1771 check_speed(500000);
1772#endif
1773#ifdef B576000
1774 check_speed(576000);
1775#endif
1776#ifdef B921600
1777 check_speed(921600);
1778#endif
1779#ifdef B1000000
1780 check_speed(1000000);
1781#endif
1782#ifdef B1152000
1783 check_speed(1152000);
1784#endif
1785#ifdef B1500000
1786 check_speed(1500000);
1787#endif
1788#ifdef B2000000
1789 check_speed(2000000);
1790#endif
1791#ifdef B2500000
1792 check_speed(2500000);
1793#endif
1794#ifdef B3000000
1795 check_speed(3000000);
1796#endif
1797#ifdef B3500000
1798 check_speed(3500000);
1799#endif
1800#ifdef B4000000
1801 check_speed(4000000);
1802#endif
6f97dba0 1803 spd = B115200;
45eea13b 1804 } while (0);
6f97dba0
AL		 1805
1806 cfsetispeed(&tty, spd);
1807 cfsetospeed(&tty, spd);
1808
1809 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1810 |INLCR|IGNCR|ICRNL|IXON);
1811 tty.c_oflag |= OPOST;
1812 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1813 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1814 switch(data_bits) {
1815 default:
1816 case 8:
1817 tty.c_cflag |= CS8;
1818 break;
1819 case 7:
1820 tty.c_cflag |= CS7;
1821 break;
1822 case 6:
1823 tty.c_cflag |= CS6;
1824 break;
1825 case 5:
1826 tty.c_cflag |= CS5;
1827 break;
1828 }
1829 switch(parity) {
1830 default:
1831 case 'N':
1832 break;
1833 case 'E':
1834 tty.c_cflag |= PARENB;
1835 break;
1836 case 'O':
1837 tty.c_cflag |= PARENB | PARODD;
1838 break;
1839 }
1840 if (stop_bits == 2)
1841 tty.c_cflag |= CSTOPB;
1842
1843 tcsetattr (fd, TCSANOW, &tty);
1844}
1845
0ec7b3e7 1846static int tty_serial_ioctl(Chardev *chr, int cmd, void *arg)
6f97dba0 1847{
777357d7 1848 FDChardev *s = FD_CHARDEV(chr);
9894dc0c 1849 QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc_in);
6f97dba0
AL		 1850
1851 switch(cmd) {
1852 case CHR_IOCTL_SERIAL_SET_PARAMS:
1853 {
1854 QEMUSerialSetParams *ssp = arg;
9894dc0c 1855 tty_serial_init(fioc->fd,
a29753f8 1856 ssp->speed, ssp->parity,
6f97dba0
AL		 1857 ssp->data_bits, ssp->stop_bits);
1858 }
1859 break;
1860 case CHR_IOCTL_SERIAL_SET_BREAK:
1861 {
1862 int enable = *(int *)arg;
a29753f8 1863 if (enable) {
9894dc0c 1864 tcsendbreak(fioc->fd, 1);
a29753f8 1865 }
6f97dba0
AL		 1866 }
1867 break;
1868 case CHR_IOCTL_SERIAL_GET_TIOCM:
1869 {
1870 int sarg = 0;
1871 int *targ = (int *)arg;
9894dc0c 1872 ioctl(fioc->fd, TIOCMGET, &sarg);
6f97dba0 1873 *targ = 0;
b4abdfa4 1874 if (sarg & TIOCM_CTS)
6f97dba0 1875 *targ |= CHR_TIOCM_CTS;
b4abdfa4 1876 if (sarg & TIOCM_CAR)
6f97dba0 1877 *targ |= CHR_TIOCM_CAR;
b4abdfa4 1878 if (sarg & TIOCM_DSR)
6f97dba0 1879 *targ |= CHR_TIOCM_DSR;
b4abdfa4 1880 if (sarg & TIOCM_RI)
6f97dba0 1881 *targ |= CHR_TIOCM_RI;
b4abdfa4 1882 if (sarg & TIOCM_DTR)
6f97dba0 1883 *targ |= CHR_TIOCM_DTR;
b4abdfa4 1884 if (sarg & TIOCM_RTS)
6f97dba0
AL		 1885 *targ |= CHR_TIOCM_RTS;
1886 }
1887 break;
1888 case CHR_IOCTL_SERIAL_SET_TIOCM:
1889 {
1890 int sarg = *(int *)arg;
1891 int targ = 0;
9894dc0c 1892 ioctl(fioc->fd, TIOCMGET, &targ);
b4abdfa4
AJ		 1893 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1894 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1895 if (sarg & CHR_TIOCM_CTS)
1896 targ |= TIOCM_CTS;
1897 if (sarg & CHR_TIOCM_CAR)
1898 targ |= TIOCM_CAR;
1899 if (sarg & CHR_TIOCM_DSR)
1900 targ |= TIOCM_DSR;
1901 if (sarg & CHR_TIOCM_RI)
1902 targ |= TIOCM_RI;
1903 if (sarg & CHR_TIOCM_DTR)
6f97dba0 1904 targ |= TIOCM_DTR;
b4abdfa4 1905 if (sarg & CHR_TIOCM_RTS)
6f97dba0 1906 targ |= TIOCM_RTS;
9894dc0c 1907 ioctl(fioc->fd, TIOCMSET, &targ);
6f97dba0
AL		 1908 }
1909 break;
1910 default:
1911 return -ENOTSUP;
1912 }
1913 return 0;
1914}
1915
0ec7b3e7 1916static void qemu_chr_free_tty(Chardev *chr)
4266a134 1917{
72ac8762 1918 fd_chr_free(chr);
4266a134 1919}
6f97dba0
AL		 1920#endif /* __linux__ || __sun__ */
1921
1922#if defined(__linux__)
e551498e
GH		 1923
1924#define HAVE_CHARDEV_PARPORT 1
1925
6f97dba0 1926typedef struct {
0ec7b3e7 1927 Chardev parent;
6f97dba0
AL		 1928 int fd;
1929 int mode;
0ec7b3e7 1930} ParallelChardev;
6f97dba0 1931
777357d7
MAL		 1932#define PARALLEL_CHARDEV(obj) \
1933 OBJECT_CHECK(ParallelChardev, (obj), TYPE_CHARDEV_PARALLEL)
1934
0ec7b3e7 1935static int pp_hw_mode(ParallelChardev *s, uint16_t mode)
6f97dba0
AL		 1936{
1937 if (s->mode != mode) {
1938 int m = mode;
1939 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1940 return 0;
1941 s->mode = mode;
1942 }
1943 return 1;
1944}
1945
0ec7b3e7 1946static int pp_ioctl(Chardev *chr, int cmd, void *arg)
6f97dba0 1947{
777357d7 1948 ParallelChardev *drv = PARALLEL_CHARDEV(chr);
6f97dba0
AL		 1949 int fd = drv->fd;
1950 uint8_t b;
1951
1952 switch(cmd) {
1953 case CHR_IOCTL_PP_READ_DATA:
1954 if (ioctl(fd, PPRDATA, &b) < 0)
1955 return -ENOTSUP;
1956 *(uint8_t *)arg = b;
1957 break;
1958 case CHR_IOCTL_PP_WRITE_DATA:
1959 b = *(uint8_t *)arg;
1960 if (ioctl(fd, PPWDATA, &b) < 0)
1961 return -ENOTSUP;
1962 break;
1963 case CHR_IOCTL_PP_READ_CONTROL:
1964 if (ioctl(fd, PPRCONTROL, &b) < 0)
1965 return -ENOTSUP;
1966 /* Linux gives only the lowest bits, and no way to know data
1967 direction! For better compatibility set the fixed upper
1968 bits. */
1969 *(uint8_t *)arg = b | 0xc0;
1970 break;
1971 case CHR_IOCTL_PP_WRITE_CONTROL:
1972 b = *(uint8_t *)arg;
1973 if (ioctl(fd, PPWCONTROL, &b) < 0)
1974 return -ENOTSUP;
1975 break;
1976 case CHR_IOCTL_PP_READ_STATUS:
1977 if (ioctl(fd, PPRSTATUS, &b) < 0)
1978 return -ENOTSUP;
1979 *(uint8_t *)arg = b;
1980 break;
1981 case CHR_IOCTL_PP_DATA_DIR:
1982 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1983 return -ENOTSUP;
1984 break;
1985 case CHR_IOCTL_PP_EPP_READ_ADDR:
1986 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1987 struct ParallelIOArg *parg = arg;
1988 int n = read(fd, parg->buffer, parg->count);
1989 if (n != parg->count) {
1990 return -EIO;
1991 }
1992 }
1993 break;
1994 case CHR_IOCTL_PP_EPP_READ:
1995 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1996 struct ParallelIOArg *parg = arg;
1997 int n = read(fd, parg->buffer, parg->count);
1998 if (n != parg->count) {
1999 return -EIO;
2000 }
2001 }
2002 break;
2003 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
2004 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
2005 struct ParallelIOArg *parg = arg;
2006 int n = write(fd, parg->buffer, parg->count);
2007 if (n != parg->count) {
2008 return -EIO;
2009 }
2010 }
2011 break;
2012 case CHR_IOCTL_PP_EPP_WRITE:
2013 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
2014 struct ParallelIOArg *parg = arg;
2015 int n = write(fd, parg->buffer, parg->count);
2016 if (n != parg->count) {
2017 return -EIO;
2018 }
2019 }
2020 break;
2021 default:
2022 return -ENOTSUP;
2023 }
2024 return 0;
2025}
2026
0ec7b3e7 2027static void pp_free(Chardev *chr)
6f97dba0 2028{
777357d7 2029 ParallelChardev *drv = PARALLEL_CHARDEV(chr);
6f97dba0
AL		 2030 int fd = drv->fd;
2031
2032 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
2033 ioctl(fd, PPRELEASE);
2034 close(fd);
a425d23f 2035 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
6f97dba0
AL		 2036}
2037
777357d7
MAL		 2038static void qemu_chr_open_pp_fd(Chardev *chr,
2039 int fd,
2040 bool *be_opened,
2041 Error **errp)
6f97dba0 2042{
777357d7 2043 ParallelChardev *drv = PARALLEL_CHARDEV(chr);
6f97dba0
AL		 2044
2045 if (ioctl(fd, PPCLAIM) < 0) {
38bfb1a6 2046 error_setg_errno(errp, errno, "not a parallel port");
6f97dba0 2047 close(fd);
777357d7 2048 return;
d0d7708b 2049 }
27ef9cb0 2050
27ef9cb0
PB		 2051 drv->fd = fd;
2052 drv->mode = IEEE1284_MODE_COMPAT;
6f97dba0
AL		 2053}
2054#endif /* __linux__ */
2055
a167ba50 2056#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
e551498e
GH		 2057
2058#define HAVE_CHARDEV_PARPORT 1
2059
41ac54b2 2060typedef struct {
0ec7b3e7 2061 Chardev parent;
41ac54b2 2062 int fd;
0ec7b3e7 2063} ParallelChardev;
41ac54b2 2064
777357d7
MAL		 2065#define PARALLEL_CHARDEV(obj) \
2066 OBJECT_CHECK(ParallelChardev, (obj), TYPE_CHARDEV_PARALLEL)
2067
0ec7b3e7 2068static int pp_ioctl(Chardev *chr, int cmd, void *arg)
6972f935 2069{
777357d7 2070 ParallelChardev *drv = PARALLEL_CHARDEV(chr);
6972f935
BS		 2071 uint8_t b;
2072
41ac54b2 2073 switch (cmd) {
6972f935 2074 case CHR_IOCTL_PP_READ_DATA:
41ac54b2 2075 if (ioctl(drv->fd, PPIGDATA, &b) < 0) {
6972f935 2076 return -ENOTSUP;
41ac54b2 2077 }
6972f935
BS		 2078 *(uint8_t *)arg = b;
2079 break;
2080 case CHR_IOCTL_PP_WRITE_DATA:
2081 b = *(uint8_t *)arg;
41ac54b2 2082 if (ioctl(drv->fd, PPISDATA, &b) < 0) {
6972f935 2083 return -ENOTSUP;
41ac54b2 2084 }
6972f935
BS		 2085 break;
2086 case CHR_IOCTL_PP_READ_CONTROL:
41ac54b2 2087 if (ioctl(drv->fd, PPIGCTRL, &b) < 0) {
6972f935 2088 return -ENOTSUP;
41ac54b2 2089 }
6972f935
BS		 2090 *(uint8_t *)arg = b;
2091 break;
2092 case CHR_IOCTL_PP_WRITE_CONTROL:
2093 b = *(uint8_t *)arg;
41ac54b2 2094 if (ioctl(drv->fd, PPISCTRL, &b) < 0) {
6972f935 2095 return -ENOTSUP;
41ac54b2 2096 }
6972f935
BS		 2097 break;
2098 case CHR_IOCTL_PP_READ_STATUS:
41ac54b2 2099 if (ioctl(drv->fd, PPIGSTATUS, &b) < 0) {
6972f935 2100 return -ENOTSUP;
41ac54b2 2101 }
6972f935
BS		 2102 *(uint8_t *)arg = b;
2103 break;
2104 default:
2105 return -ENOTSUP;
2106 }
2107 return 0;
2108}
2109
777357d7
MAL		 2110static void qemu_chr_open_pp_fd(Chardev *chr,
2111 int fd,
2112 bool *be_opened,
2113 Error **errp)
6972f935 2114{
777357d7 2115 ParallelChardev *drv = PARALLEL_CHARDEV(chr);
41ac54b2 2116 drv->fd = fd;
82878dac 2117 *be_opened = false;
6972f935
BS		 2118}
2119#endif
2120
6f97dba0
AL		 2121#else /* _WIN32 */
2122
d809ab95
PB		 2123#define HAVE_CHARDEV_SERIAL 1
2124
6f97dba0 2125typedef struct {
0ec7b3e7 2126 Chardev parent;
6f97dba0
AL		 2127 int max_size;
2128 HANDLE hcom, hrecv, hsend;
9005b2a7 2129 OVERLAPPED orecv;
6f97dba0
AL		 2130 BOOL fpipe;
2131 DWORD len;
9005b2a7 2132
0ec7b3e7 2133 /* Protected by the Chardev chr_write_lock. */
9005b2a7 2134 OVERLAPPED osend;
0ec7b3e7 2135} WinChardev;
6f97dba0 2136
777357d7
MAL		 2137#define TYPE_CHARDEV_WIN "chardev-win"
2138#define WIN_CHARDEV(obj) OBJECT_CHECK(WinChardev, (obj), TYPE_CHARDEV_WIN)
2139
db418a0a 2140typedef struct {
0ec7b3e7 2141 Chardev parent;
db418a0a
FC		 2142 HANDLE hStdIn;
2143 HANDLE hInputReadyEvent;
2144 HANDLE hInputDoneEvent;
2145 HANDLE hInputThread;
2146 uint8_t win_stdio_buf;
0ec7b3e7 2147} WinStdioChardev;
db418a0a 2148
777357d7
MAL		 2149#define TYPE_CHARDEV_WIN_STDIO "chardev-win-stdio"
2150#define WIN_STDIO_CHARDEV(obj) \
2151 OBJECT_CHECK(WinStdioChardev, (obj), TYPE_CHARDEV_WIN_STDIO)
2152
6f97dba0
AL		 2153#define NSENDBUF 2048
2154#define NRECVBUF 2048
2155#define MAXCONNECT 1
2156#define NTIMEOUT 5000
2157
2158static int win_chr_poll(void *opaque);
2159static int win_chr_pipe_poll(void *opaque);
2160
0ec7b3e7 2161static void win_chr_free(Chardev *chr)
6f97dba0 2162{
777357d7 2163 WinChardev *s = WIN_CHARDEV(chr);
6f97dba0
AL		 2164
2165 if (s->hsend) {
2166 CloseHandle(s->hsend);
2167 s->hsend = NULL;
2168 }
2169 if (s->hrecv) {
2170 CloseHandle(s->hrecv);
2171 s->hrecv = NULL;
2172 }
2173 if (s->hcom) {
2174 CloseHandle(s->hcom);
2175 s->hcom = NULL;
2176 }
2177 if (s->fpipe)
2178 qemu_del_polling_cb(win_chr_pipe_poll, chr);
2179 else
2180 qemu_del_polling_cb(win_chr_poll, chr);
793cbfb5 2181
a425d23f 2182 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
6f97dba0
AL		 2183}
2184
0ec7b3e7 2185static int win_chr_init(Chardev *chr, const char *filename, Error **errp)
6f97dba0 2186{
777357d7 2187 WinChardev *s = WIN_CHARDEV(chr);
6f97dba0
AL		 2188 COMMCONFIG comcfg;
2189 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
2190 COMSTAT comstat;
2191 DWORD size;
2192 DWORD err;
2193
2194 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
2195 if (!s->hsend) {
6511d396 2196 error_setg(errp, "Failed CreateEvent");
6f97dba0
AL		 2197 goto fail;
2198 }
2199 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
2200 if (!s->hrecv) {
6511d396 2201 error_setg(errp, "Failed CreateEvent");
6f97dba0
AL		 2202 goto fail;
2203 }
2204
2205 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
2206 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
2207 if (s->hcom == INVALID_HANDLE_VALUE) {
6511d396 2208 error_setg(errp, "Failed CreateFile (%lu)", GetLastError());
6f97dba0
AL		 2209 s->hcom = NULL;
2210 goto fail;
2211 }
2212
2213 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
6511d396 2214 error_setg(errp, "Failed SetupComm");
6f97dba0
AL		 2215 goto fail;
2216 }
2217
2218 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
2219 size = sizeof(COMMCONFIG);
2220 GetDefaultCommConfig(filename, &comcfg, &size);
2221 comcfg.dcb.DCBlength = sizeof(DCB);
2222 CommConfigDialog(filename, NULL, &comcfg);
2223
2224 if (!SetCommState(s->hcom, &comcfg.dcb)) {
6511d396 2225 error_setg(errp, "Failed SetCommState");
6f97dba0
AL		 2226 goto fail;
2227 }
2228
2229 if (!SetCommMask(s->hcom, EV_ERR)) {
6511d396 2230 error_setg(errp, "Failed SetCommMask");
6f97dba0
AL		 2231 goto fail;
2232 }
2233
2234 cto.ReadIntervalTimeout = MAXDWORD;
2235 if (!SetCommTimeouts(s->hcom, &cto)) {
6511d396 2236 error_setg(errp, "Failed SetCommTimeouts");
6f97dba0
AL		 2237 goto fail;
2238 }
2239
2240 if (!ClearCommError(s->hcom, &err, &comstat)) {
6511d396 2241 error_setg(errp, "Failed ClearCommError");
6f97dba0
AL		 2242 goto fail;
2243 }
2244 qemu_add_polling_cb(win_chr_poll, chr);
2245 return 0;
2246
2247 fail:
72ac8762 2248 win_chr_free(chr);
6f97dba0
AL		 2249 return -1;
2250}
2251
9005b2a7 2252/* Called with chr_write_lock held. */
0ec7b3e7 2253static int win_chr_write(Chardev *chr, const uint8_t *buf, int len1)
6f97dba0 2254{
777357d7 2255 WinChardev *s = WIN_CHARDEV(chr);
6f97dba0
AL		 2256 DWORD len, ret, size, err;
2257
2258 len = len1;
2259 ZeroMemory(&s->osend, sizeof(s->osend));
2260 s->osend.hEvent = s->hsend;
2261 while (len > 0) {
2262 if (s->hsend)
2263 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
2264 else
2265 ret = WriteFile(s->hcom, buf, len, &size, NULL);
2266 if (!ret) {
2267 err = GetLastError();
2268 if (err == ERROR_IO_PENDING) {
2269 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
2270 if (ret) {
2271 buf += size;
2272 len -= size;
2273 } else {
2274 break;
2275 }
2276 } else {
2277 break;
2278 }
2279 } else {
2280 buf += size;
2281 len -= size;
2282 }
2283 }
2284 return len1 - len;
2285}
2286
0ec7b3e7 2287static int win_chr_read_poll(Chardev *chr)
6f97dba0 2288{
777357d7 2289 WinChardev *s = WIN_CHARDEV(chr);
6f97dba0 2290
909cda12 2291 s->max_size = qemu_chr_be_can_write(chr);
6f97dba0
AL		 2292 return s->max_size;
2293}
2294
0ec7b3e7 2295static void win_chr_readfile(Chardev *chr)
6f97dba0 2296{
777357d7
MAL		 2297 WinChardev *s = WIN_CHARDEV(chr);
2298
6f97dba0 2299 int ret, err;
9bd7854e 2300 uint8_t buf[READ_BUF_LEN];
6f97dba0
AL		 2301 DWORD size;
2302
2303 ZeroMemory(&s->orecv, sizeof(s->orecv));
2304 s->orecv.hEvent = s->hrecv;
2305 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
2306 if (!ret) {
2307 err = GetLastError();
2308 if (err == ERROR_IO_PENDING) {
2309 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
2310 }
2311 }
2312
2313 if (size > 0) {
fa5efccb 2314 qemu_chr_be_write(chr, buf, size);
6f97dba0
AL		 2315 }
2316}
2317
0ec7b3e7 2318static void win_chr_read(Chardev *chr)
6f97dba0 2319{
777357d7 2320 WinChardev *s = WIN_CHARDEV(chr);
6f97dba0
AL		 2321
2322 if (s->len > s->max_size)
2323 s->len = s->max_size;
2324 if (s->len == 0)
2325 return;
2326
2327 win_chr_readfile(chr);
2328}
2329
2330static int win_chr_poll(void *opaque)
2331{
777357d7
MAL		 2332 Chardev *chr = CHARDEV(opaque);
2333 WinChardev *s = WIN_CHARDEV(opaque);
6f97dba0
AL		 2334 COMSTAT status;
2335 DWORD comerr;
2336
2337 ClearCommError(s->hcom, &comerr, &status);
2338 if (status.cbInQue > 0) {
2339 s->len = status.cbInQue;
2340 win_chr_read_poll(chr);
2341 win_chr_read(chr);
2342 return 1;
2343 }
2344 return 0;
2345}
2346
6f97dba0
AL		 2347static int win_chr_pipe_poll(void *opaque)
2348{
777357d7
MAL		 2349 Chardev *chr = CHARDEV(opaque);
2350 WinChardev *s = WIN_CHARDEV(opaque);
6f97dba0
AL		 2351 DWORD size;
2352
2353 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
2354 if (size > 0) {
2355 s->len = size;
2356 win_chr_read_poll(chr);
2357 win_chr_read(chr);
2358 return 1;
2359 }
2360 return 0;
2361}
2362
0ec7b3e7 2363static int win_chr_pipe_init(Chardev *chr, const char *filename,
20cbe7a2 2364 Error **errp)
6f97dba0 2365{
777357d7 2366 WinChardev *s = WIN_CHARDEV(chr);
6f97dba0
AL		 2367 OVERLAPPED ov;
2368 int ret;
2369 DWORD size;
0ff0fad2 2370 char *openname;
6f97dba0
AL		 2371
2372 s->fpipe = TRUE;
2373
2374 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
2375 if (!s->hsend) {
20cbe7a2 2376 error_setg(errp, "Failed CreateEvent");
6f97dba0
AL		 2377 goto fail;
2378 }
2379 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
2380 if (!s->hrecv) {
20cbe7a2 2381 error_setg(errp, "Failed CreateEvent");
6f97dba0
AL		 2382 goto fail;
2383 }
2384
0ff0fad2 2385 openname = g_strdup_printf("\\\\.\\pipe\\%s", filename);
6f97dba0
AL		 2386 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
2387 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
2388 PIPE_WAIT,
2389 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
0ff0fad2 2390 g_free(openname);
6f97dba0 2391 if (s->hcom == INVALID_HANDLE_VALUE) {
20cbe7a2 2392 error_setg(errp, "Failed CreateNamedPipe (%lu)", GetLastError());
6f97dba0
AL		 2393 s->hcom = NULL;
2394 goto fail;
2395 }
2396
2397 ZeroMemory(&ov, sizeof(ov));
2398 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
2399 ret = ConnectNamedPipe(s->hcom, &ov);
2400 if (ret) {
20cbe7a2 2401 error_setg(errp, "Failed ConnectNamedPipe");
6f97dba0
AL		 2402 goto fail;
2403 }
2404
2405 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
2406 if (!ret) {
20cbe7a2 2407 error_setg(errp, "Failed GetOverlappedResult");
6f97dba0
AL		 2408 if (ov.hEvent) {
2409 CloseHandle(ov.hEvent);
2410 ov.hEvent = NULL;
2411 }
2412 goto fail;
2413 }
2414
2415 if (ov.hEvent) {
2416 CloseHandle(ov.hEvent);
2417 ov.hEvent = NULL;
2418 }
2419 qemu_add_polling_cb(win_chr_pipe_poll, chr);
2420 return 0;
2421
2422 fail:
72ac8762 2423 win_chr_free(chr);
6f97dba0
AL		 2424 return -1;
2425}
2426
2427
777357d7
MAL		 2428static void qemu_chr_open_pipe(Chardev *chr,
2429 ChardevBackend *backend,
2430 bool *be_opened,
2431 Error **errp)
6f97dba0 2432{
32bafa8f 2433 ChardevHostdev *opts = backend->u.pipe.data;
548cbb36 2434 const char *filename = opts->device;
6f97dba0 2435
20cbe7a2 2436 if (win_chr_pipe_init(chr, filename, errp) < 0) {
777357d7 2437 return;
6f97dba0 2438 }
6f97dba0
AL		 2439}
2440
777357d7 2441static void qemu_chr_open_win_file(Chardev *chr, HANDLE fd_out)
6f97dba0 2442{
777357d7 2443 WinChardev *s = WIN_CHARDEV(chr);
6f97dba0 2444
6f97dba0 2445 s->hcom = fd_out;
6f97dba0
AL		 2446}
2447
777357d7 2448static void char_win_class_init(ObjectClass *oc, void *data)
6f97dba0 2449{
777357d7
MAL		 2450 ChardevClass *cc = CHARDEV_CLASS(oc);
2451
2452 cc->chr_write = win_chr_write;
2453 cc->chr_free = win_chr_free;
6f97dba0
AL		 2454}
2455
777357d7
MAL		 2456static const TypeInfo char_win_type_info = {
2457 .name = TYPE_CHARDEV_WIN,
2458 .parent = TYPE_CHARDEV,
0ec7b3e7 2459 .instance_size = sizeof(WinChardev),
777357d7
MAL		 2460 .class_init = char_win_class_init,
2461 .abstract = true,
2462};
2463
2464static void qemu_chr_open_win_con(Chardev *chr,
2465 ChardevBackend *backend,
2466 bool *be_opened,
2467 Error **errp)
2468{
2469 qemu_chr_open_win_file(chr, GetStdHandle(STD_OUTPUT_HANDLE));
2470}
2471
2472static const CharDriver console_driver = {
b68e956a 2473 .kind = CHARDEV_BACKEND_KIND_CONSOLE,
777357d7
MAL		 2474};
2475
2476static void char_console_class_init(ObjectClass *oc, void *data)
2477{
2478 ChardevClass *cc = CHARDEV_CLASS(oc);
2479
2480 cc->open = qemu_chr_open_win_con;
2481 cc->chr_free = NULL;
2482}
2483
2484static const TypeInfo char_console_type_info = {
2485 .name = TYPE_CHARDEV_CONSOLE,
2486 .parent = TYPE_CHARDEV_WIN,
2487 .class_init = char_console_class_init,
b68e956a
MAL		 2488};
2489
0ec7b3e7 2490static int win_stdio_write(Chardev *chr, const uint8_t *buf, int len)
db418a0a
FC		 2491{
2492 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
2493 DWORD dwSize;
2494 int len1;
2495
2496 len1 = len;
2497
2498 while (len1 > 0) {
2499 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
2500 break;
2501 }
2502 buf += dwSize;
2503 len1 -= dwSize;
2504 }
2505
2506 return len - len1;
2507}
2508
2509static void win_stdio_wait_func(void *opaque)
2510{
777357d7
MAL		 2511 Chardev *chr = CHARDEV(opaque);
2512 WinStdioChardev *stdio = WIN_STDIO_CHARDEV(opaque);
db418a0a
FC		 2513 INPUT_RECORD buf[4];
2514 int ret;
2515 DWORD dwSize;
2516 int i;
2517
dff7424d 2518 ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize);
db418a0a
FC		 2519
2520 if (!ret) {
2521 /* Avoid error storm */
2522 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
2523 return;
2524 }
2525
2526 for (i = 0; i < dwSize; i++) {
2527 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
2528
2529 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
2530 int j;
2531 if (kev->uChar.AsciiChar != 0) {
2532 for (j = 0; j < kev->wRepeatCount; j++) {
2533 if (qemu_chr_be_can_write(chr)) {
2534 uint8_t c = kev->uChar.AsciiChar;
2535 qemu_chr_be_write(chr, &c, 1);
2536 }
2537 }
2538 }
2539 }
2540 }
2541}
2542
2543static DWORD WINAPI win_stdio_thread(LPVOID param)
2544{
777357d7 2545 WinStdioChardev *stdio = WIN_STDIO_CHARDEV(param);
db418a0a
FC		 2546 int ret;
2547 DWORD dwSize;
2548
2549 while (1) {
2550
2551 /* Wait for one byte */
2552 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
2553
2554 /* Exit in case of error, continue if nothing read */
2555 if (!ret) {
2556 break;
2557 }
2558 if (!dwSize) {
2559 continue;
2560 }
2561
2562 /* Some terminal emulator returns \r\n for Enter, just pass \n */
2563 if (stdio->win_stdio_buf == '\r') {
2564 continue;
2565 }
2566
2567 /* Signal the main thread and wait until the byte was eaten */
2568 if (!SetEvent(stdio->hInputReadyEvent)) {
2569 break;
2570 }
2571 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
2572 != WAIT_OBJECT_0) {
2573 break;
2574 }
2575 }
2576
2577 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2578 return 0;
2579}
2580
2581static void win_stdio_thread_wait_func(void *opaque)
2582{
777357d7
MAL		 2583 Chardev *chr = CHARDEV(opaque);
2584 WinStdioChardev *stdio = WIN_STDIO_CHARDEV(opaque);
db418a0a
FC		 2585
2586 if (qemu_chr_be_can_write(chr)) {
2587 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
2588 }
2589
2590 SetEvent(stdio->hInputDoneEvent);
2591}
2592
0ec7b3e7 2593static void qemu_chr_set_echo_win_stdio(Chardev *chr, bool echo)
db418a0a 2594{
777357d7 2595 WinStdioChardev *stdio = WIN_STDIO_CHARDEV(chr);
db418a0a
FC		 2596 DWORD dwMode = 0;
2597
2598 GetConsoleMode(stdio->hStdIn, &dwMode);
2599
2600 if (echo) {
2601 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
2602 } else {
2603 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
2604 }
2605}
2606
0ec7b3e7 2607static void win_stdio_free(Chardev *chr)
db418a0a 2608{
777357d7 2609 WinStdioChardev *stdio = WIN_STDIO_CHARDEV(chr);
db418a0a
FC		 2610
2611 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
2612 CloseHandle(stdio->hInputReadyEvent);
2613 }
2614 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
2615 CloseHandle(stdio->hInputDoneEvent);
2616 }
2617 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
2618 TerminateThread(stdio->hInputThread, 0);
2619 }
db418a0a
FC		 2620}
2621
777357d7
MAL		 2622static const TypeInfo char_win_stdio_type_info = {
2623 .name = TYPE_CHARDEV_WIN_STDIO,
2624 .parent = TYPE_CHARDEV,
2625 .instance_size = sizeof(WinStdioChardev),
2626 .abstract = true,
2627};
2628
2629static void qemu_chr_open_stdio(Chardev *chr,
2630 ChardevBackend *backend,
2631 bool *be_opened,
2632 Error **errp)
db418a0a 2633{
777357d7 2634 WinStdioChardev *stdio = WIN_STDIO_CHARDEV(chr);
db418a0a
FC		 2635 DWORD dwMode;
2636 int is_console = 0;
db418a0a
FC		 2637
2638 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
2639 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
8c84b25d 2640 error_setg(errp, "cannot open stdio: invalid handle");
777357d7 2641 return;
db418a0a
FC		 2642 }
2643
2644 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
2645
ed7a1540
AL		 2646 if (is_console) {
2647 if (qemu_add_wait_object(stdio->hStdIn,
2648 win_stdio_wait_func, chr)) {
8c84b25d
PB		 2649 error_setg(errp, "qemu_add_wait_object: failed");
2650 goto err1;
ed7a1540
AL		 2651 }
2652 } else {
2653 DWORD dwId;
2654
2655 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
2656 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
8c84b25d 2657 if (stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
ed7a1540 2658 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
8c84b25d
PB		 2659 error_setg(errp, "cannot create event");
2660 goto err2;
ed7a1540
AL		 2661 }
2662 if (qemu_add_wait_object(stdio->hInputReadyEvent,
2663 win_stdio_thread_wait_func, chr)) {
8c84b25d
PB		 2664 error_setg(errp, "qemu_add_wait_object: failed");
2665 goto err2;
2666 }
2667 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
2668 chr, 0, &dwId);
2669
2670 if (stdio->hInputThread == INVALID_HANDLE_VALUE) {
2671 error_setg(errp, "cannot create stdio thread");
2672 goto err3;
db418a0a
FC		 2673 }
2674 }
2675
2676 dwMode |= ENABLE_LINE_INPUT;
2677
ed7a1540 2678 if (is_console) {
db418a0a
FC		 2679 /* set the terminal in raw mode */
2680 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2681 dwMode |= ENABLE_PROCESSED_INPUT;
2682 }
2683
2684 SetConsoleMode(stdio->hStdIn, dwMode);
2685
5345fdb4 2686 qemu_chr_set_echo_win_stdio(chr, false);
db418a0a 2687
777357d7 2688 return;
8c84b25d
PB		 2689
2690err3:
2691 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
2692err2:
2693 CloseHandle(stdio->hInputReadyEvent);
2694 CloseHandle(stdio->hInputDoneEvent);
2695err1:
2696 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
db418a0a 2697}
6f97dba0
AL		 2698#endif /* !_WIN32 */
2699
2700/***********************************************************/
2701/* UDP Net console */
2702
2703typedef struct {
0ec7b3e7 2704 Chardev parent;
9894dc0c 2705 QIOChannel *ioc;
9bd7854e 2706 uint8_t buf[READ_BUF_LEN];
6f97dba0
AL		 2707 int bufcnt;
2708 int bufptr;
2709 int max_size;
1876ed04 2710} UdpChardev;
6f97dba0 2711
777357d7
MAL		 2712#define UDP_CHARDEV(obj) OBJECT_CHECK(UdpChardev, (obj), TYPE_CHARDEV_UDP)
2713
9005b2a7 2714/* Called with chr_write_lock held. */
0ec7b3e7 2715static int udp_chr_write(Chardev *chr, const uint8_t *buf, int len)
6f97dba0 2716{
777357d7 2717 UdpChardev *s = UDP_CHARDEV(chr);
76a9644b 2718
9894dc0c
DB		 2719 return qio_channel_write(
2720 s->ioc, (const char *)buf, len, NULL);
6f97dba0
AL		 2721}
2722
2723static int udp_chr_read_poll(void *opaque)
2724{
777357d7
MAL		 2725 Chardev *chr = CHARDEV(opaque);
2726 UdpChardev *s = UDP_CHARDEV(opaque);
6f97dba0 2727
909cda12 2728 s->max_size = qemu_chr_be_can_write(chr);
6f97dba0
AL		 2729
2730 /* If there were any stray characters in the queue process them
2731 * first
2732 */
2733 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
fa5efccb 2734 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
6f97dba0 2735 s->bufptr++;
909cda12 2736 s->max_size = qemu_chr_be_can_write(chr);
6f97dba0
AL		 2737 }
2738 return s->max_size;
2739}
2740
9894dc0c 2741static gboolean udp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
6f97dba0 2742{
777357d7
MAL		 2743 Chardev *chr = CHARDEV(opaque);
2744 UdpChardev *s = UDP_CHARDEV(opaque);
9894dc0c 2745 ssize_t ret;
6f97dba0 2746
cdbf6e16
PB		 2747 if (s->max_size == 0) {
2748 return TRUE;
2749 }
9894dc0c
DB		 2750 ret = qio_channel_read(
2751 s->ioc, (char *)s->buf, sizeof(s->buf), NULL);
2752 if (ret <= 0) {
26da70c7 2753 remove_fd_in_watch(chr);
76a9644b
AL		 2754 return FALSE;
2755 }
9894dc0c 2756 s->bufcnt = ret;
6f97dba0
AL		 2757
2758 s->bufptr = 0;
2759 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
fa5efccb 2760 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
6f97dba0 2761 s->bufptr++;
909cda12 2762 s->max_size = qemu_chr_be_can_write(chr);
6f97dba0 2763 }
76a9644b
AL		 2764
2765 return TRUE;
6f97dba0
AL		 2766}
2767
0ec7b3e7 2768static void udp_chr_update_read_handler(Chardev *chr,
a4afa548 2769 GMainContext *context)
6f97dba0 2770{
777357d7 2771 UdpChardev *s = UDP_CHARDEV(chr);
6f97dba0 2772
26da70c7 2773 remove_fd_in_watch(chr);
9894dc0c 2774 if (s->ioc) {
e93a68e1 2775 chr->fd_in_tag = io_add_watch_poll(chr, s->ioc,
9894dc0c 2776 udp_chr_read_poll,
e92aa36a
ZC		 2777 udp_chr_read, chr,
2778 context);
6f97dba0
AL		 2779 }
2780}
2781
0ec7b3e7 2782static void udp_chr_free(Chardev *chr)
819f56b7 2783{
777357d7 2784 UdpChardev *s = UDP_CHARDEV(chr);
26da70c7
AS		 2785
2786 remove_fd_in_watch(chr);
9894dc0c
DB		 2787 if (s->ioc) {
2788 object_unref(OBJECT(s->ioc));
819f56b7 2789 }
a425d23f 2790 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
819f56b7
AL		 2791}
2792
6f97dba0
AL		 2793/***********************************************************/
2794/* TCP Net console */
2795
2796typedef struct {
0ec7b3e7 2797 Chardev parent;
a8fb5427
DB		 2798 QIOChannel *ioc; /* Client I/O channel */
2799 QIOChannelSocket *sioc; /* Client master channel */
9894dc0c 2800 QIOChannelSocket *listen_ioc;
7ba9addc 2801 guint listen_tag;
a8fb5427 2802 QCryptoTLSCreds *tls_creds;
6f97dba0
AL		 2803 int connected;
2804 int max_size;
2805 int do_telnetopt;
2806 int do_nodelay;
2807 int is_unix;
c76bf6bb 2808 int *read_msgfds;
9894dc0c 2809 size_t read_msgfds_num;
d39aac7a 2810 int *write_msgfds;
9894dc0c 2811 size_t write_msgfds_num;
cfb429cb
CM		 2812
2813 SocketAddress *addr;
2814 bool is_listen;
2815 bool is_telnet;
5dd1f02b
CM		 2816
2817 guint reconnect_timer;
2818 int64_t reconnect_time;
5008e5b7 2819 bool connect_err_reported;
1876ed04 2820} SocketChardev;
6f97dba0 2821
777357d7
MAL		 2822#define SOCKET_CHARDEV(obj) \
2823 OBJECT_CHECK(SocketChardev, (obj), TYPE_CHARDEV_SOCKET)
2824
5dd1f02b
CM		 2825static gboolean socket_reconnect_timeout(gpointer opaque);
2826
0ec7b3e7 2827static void qemu_chr_socket_restart_timer(Chardev *chr)
5dd1f02b 2828{
777357d7 2829 SocketChardev *s = SOCKET_CHARDEV(chr);
e93a68e1 2830 char *name;
41ac54b2 2831
5dd1f02b
CM		 2832 assert(s->connected == 0);
2833 s->reconnect_timer = g_timeout_add_seconds(s->reconnect_time,
2834 socket_reconnect_timeout, chr);
e93a68e1
DB		 2835 name = g_strdup_printf("chardev-socket-reconnect-%s", chr->label);
2836 g_source_set_name_by_id(s->reconnect_timer, name);
2837 g_free(name);
5dd1f02b
CM		 2838}
2839
0ec7b3e7 2840static void check_report_connect_error(Chardev *chr,
5008e5b7
CM		 2841 Error *err)
2842{
777357d7 2843 SocketChardev *s = SOCKET_CHARDEV(chr);
5008e5b7
CM		 2844
2845 if (!s->connect_err_reported) {
2846 error_report("Unable to connect character device %s: %s",
2847 chr->label, error_get_pretty(err));
2848 s->connect_err_reported = true;
2849 }
2850 qemu_chr_socket_restart_timer(chr);
2851}
2852
9894dc0c
DB		 2853static gboolean tcp_chr_accept(QIOChannel *chan,
2854 GIOCondition cond,
2855 void *opaque);
d39aac7a 2856
9005b2a7 2857/* Called with chr_write_lock held. */
0ec7b3e7 2858static int tcp_chr_write(Chardev *chr, const uint8_t *buf, int len)
6f97dba0 2859{
777357d7 2860 SocketChardev *s = SOCKET_CHARDEV(chr);
41ac54b2 2861
6f97dba0 2862 if (s->connected) {
9894dc0c
DB		 2863 int ret = io_channel_send_full(s->ioc, buf, len,
2864 s->write_msgfds,
2865 s->write_msgfds_num);
2866
2867 /* free the written msgfds, no matter what */
2868 if (s->write_msgfds_num) {
2869 g_free(s->write_msgfds);
2870 s->write_msgfds = 0;
2871 s->write_msgfds_num = 0;
d39aac7a 2872 }
9894dc0c
DB		 2873
2874 return ret;
455aa1e0 2875 } else {
6db0fdce 2876 /* XXX: indicate an error ? */
455aa1e0 2877 return len;
6f97dba0
AL		 2878 }
2879}
2880
2881static int tcp_chr_read_poll(void *opaque)
2882{
777357d7
MAL		 2883 Chardev *chr = CHARDEV(opaque);
2884 SocketChardev *s = SOCKET_CHARDEV(opaque);
6f97dba0
AL		 2885 if (!s->connected)
2886 return 0;
909cda12 2887 s->max_size = qemu_chr_be_can_write(chr);
6f97dba0
AL		 2888 return s->max_size;
2889}
2890
2891#define IAC 255
2892#define IAC_BREAK 243
0ec7b3e7 2893static void tcp_chr_process_IAC_bytes(Chardev *chr,
1876ed04 2894 SocketChardev *s,
6f97dba0
AL		 2895 uint8_t *buf, int *size)
2896{
2897 /* Handle any telnet client's basic IAC options to satisfy char by
2898 * char mode with no echo. All IAC options will be removed from
2899 * the buf and the do_telnetopt variable will be used to track the
2900 * state of the width of the IAC information.
2901 *
2902 * IAC commands come in sets of 3 bytes with the exception of the
2903 * "IAC BREAK" command and the double IAC.
2904 */
2905
2906 int i;
2907 int j = 0;
2908
2909 for (i = 0; i < *size; i++) {
2910 if (s->do_telnetopt > 1) {
2911 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2912 /* Double IAC means send an IAC */
2913 if (j != i)
2914 buf[j] = buf[i];
2915 j++;
2916 s->do_telnetopt = 1;
2917 } else {
2918 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2919 /* Handle IAC break commands by sending a serial break */
a425d23f 2920 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
6f97dba0
AL		 2921 s->do_telnetopt++;
2922 }
2923 s->do_telnetopt++;
2924 }
2925 if (s->do_telnetopt >= 4) {
2926 s->do_telnetopt = 1;
2927 }
2928 } else {
2929 if ((unsigned char)buf[i] == IAC) {
2930 s->do_telnetopt = 2;
2931 } else {
2932 if (j != i)
2933 buf[j] = buf[i];
2934 j++;
2935 }
2936 }
2937 }
2938 *size = j;
2939}
2940
0ec7b3e7 2941static int tcp_get_msgfds(Chardev *chr, int *fds, int num)
7d174059 2942{
777357d7 2943 SocketChardev *s = SOCKET_CHARDEV(chr);
41ac54b2 2944
c76bf6bb
NN		 2945 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
2946
c4095726
MT		 2947 assert(num <= TCP_MAX_FDS);
2948
c76bf6bb 2949 if (to_copy) {
d2fc39b4
SH		 2950 int i;
2951
c76bf6bb
NN		 2952 memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
2953
d2fc39b4
SH		 2954 /* Close unused fds */
2955 for (i = to_copy; i < s->read_msgfds_num; i++) {
2956 close(s->read_msgfds[i]);
2957 }
2958
c76bf6bb
NN		 2959 g_free(s->read_msgfds);
2960 s->read_msgfds = 0;
2961 s->read_msgfds_num = 0;
2962 }
2963
2964 return to_copy;
7d174059
MM		 2965}
2966
0ec7b3e7 2967static int tcp_set_msgfds(Chardev *chr, int *fds, int num)
d39aac7a 2968{
777357d7 2969 SocketChardev *s = SOCKET_CHARDEV(chr);
d39aac7a
NN		 2970
2971 /* clear old pending fd array */
ef1e1e07 2972 g_free(s->write_msgfds);
869a58af 2973 s->write_msgfds = NULL;
5b498459 2974 s->write_msgfds_num = 0;
d39aac7a 2975
5c7eaabf
MAL		 2976 if (!s->connected ||
2977 !qio_channel_has_feature(s->ioc,
2978 QIO_CHANNEL_FEATURE_FD_PASS)) {
2979 return -1;
2980 }
2981
d39aac7a 2982 if (num) {
2d528d45 2983 s->write_msgfds = g_new(int, num);
d39aac7a
NN		 2984 memcpy(s->write_msgfds, fds, num * sizeof(int));
2985 }
2986
2987 s->write_msgfds_num = num;
2988
2989 return 0;
2990}
2991
0ec7b3e7 2992static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len)
7d174059 2993{
777357d7 2994 SocketChardev *s = SOCKET_CHARDEV(chr);
9894dc0c
DB		 2995 struct iovec iov = { .iov_base = buf, .iov_len = len };
2996 int ret;
2997 size_t i;
2998 int *msgfds = NULL;
2999 size_t msgfds_num = 0;
3000
3001 if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) {
3002 ret = qio_channel_readv_full(s->ioc, &iov, 1,
3003 &msgfds, &msgfds_num,
3004 NULL);
3005 } else {
3006 ret = qio_channel_readv_full(s->ioc, &iov, 1,
3007 NULL, NULL,
3008 NULL);
3009 }
7d174059 3010
b6572b4f
MAL		 3011 if (ret == QIO_CHANNEL_ERR_BLOCK) {
3012 errno = EAGAIN;
3013 ret = -1;
3014 } else if (ret == -1) {
3015 errno = EIO;
3016 }
3017
9894dc0c 3018 if (msgfds_num) {
c76bf6bb
NN		 3019 /* close and clean read_msgfds */
3020 for (i = 0; i < s->read_msgfds_num; i++) {
3021 close(s->read_msgfds[i]);
3022 }
9b938c72 3023
c76bf6bb
NN		 3024 if (s->read_msgfds_num) {
3025 g_free(s->read_msgfds);
3026 }
3027
9894dc0c
DB		 3028 s->read_msgfds = msgfds;
3029 s->read_msgfds_num = msgfds_num;
7d174059 3030 }
7d174059 3031
9894dc0c
DB		 3032 for (i = 0; i < s->read_msgfds_num; i++) {
3033 int fd = s->read_msgfds[i];
3034 if (fd < 0) {
3035 continue;
3036 }
9977c894 3037
9894dc0c
DB		 3038 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
3039 qemu_set_block(fd);
7d174059 3040
9894dc0c
DB		 3041#ifndef MSG_CMSG_CLOEXEC
3042 qemu_set_cloexec(fd);
06138651 3043#endif
06138651 3044 }
9977c894 3045
7d174059 3046 return ret;
9977c894 3047}
9977c894 3048
0ec7b3e7 3049static GSource *tcp_chr_add_watch(Chardev *chr, GIOCondition cond)
d3cc5bc4 3050{
777357d7 3051 SocketChardev *s = SOCKET_CHARDEV(chr);
9894dc0c 3052 return qio_channel_create_watch(s->ioc, cond);
d3cc5bc4
AS		 3053}
3054
0ec7b3e7 3055static void tcp_chr_free_connection(Chardev *chr)
7b0bfdf5 3056{
777357d7 3057 SocketChardev *s = SOCKET_CHARDEV(chr);
5b498459 3058 int i;
7b0bfdf5 3059
342f7a9d
MAL		 3060 if (!s->connected) {
3061 return;
3062 }
3063
5b498459
MAL		 3064 if (s->read_msgfds_num) {
3065 for (i = 0; i < s->read_msgfds_num; i++) {
3066 close(s->read_msgfds[i]);
3067 }
3068 g_free(s->read_msgfds);
3069 s->read_msgfds = NULL;
3070 s->read_msgfds_num = 0;
7b0bfdf5 3071 }
5b498459 3072
6167ebbd 3073 tcp_set_msgfds(chr, NULL, 0);
7b0bfdf5 3074 remove_fd_in_watch(chr);
a8fb5427
DB		 3075 object_unref(OBJECT(s->sioc));
3076 s->sioc = NULL;
9894dc0c
DB		 3077 object_unref(OBJECT(s->ioc));
3078 s->ioc = NULL;
0ff0fad2 3079 g_free(chr->filename);
5b498459
MAL		 3080 chr->filename = NULL;
3081 s->connected = 0;
3082}
3083
0ec7b3e7 3084static void tcp_chr_disconnect(Chardev *chr)
5b498459 3085{
777357d7 3086 SocketChardev *s = SOCKET_CHARDEV(chr);
5b498459
MAL		 3087
3088 if (!s->connected) {
3089 return;
3090 }
3091
3092 tcp_chr_free_connection(chr);
3093
3094 if (s->listen_ioc) {
3095 s->listen_tag = qio_channel_add_watch(
3096 QIO_CHANNEL(s->listen_ioc), G_IO_IN, tcp_chr_accept, chr, NULL);
3097 }
0ff0fad2
DB		 3098 chr->filename = SocketAddress_to_str("disconnected:", s->addr,
3099 s->is_listen, s->is_telnet);
7b0bfdf5 3100 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
5dd1f02b
CM		 3101 if (s->reconnect_time) {
3102 qemu_chr_socket_restart_timer(chr);
3103 }
7b0bfdf5
NN		 3104}
3105
9894dc0c 3106static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
6f97dba0 3107{
777357d7
MAL		 3108 Chardev *chr = CHARDEV(opaque);
3109 SocketChardev *s = SOCKET_CHARDEV(opaque);
9bd7854e 3110 uint8_t buf[READ_BUF_LEN];
6f97dba0
AL		 3111 int len, size;
3112
2ea5a7af 3113 if (!s->connected || s->max_size <= 0) {
cdbf6e16 3114 return TRUE;
2ea5a7af 3115 }
6f97dba0
AL		 3116 len = sizeof(buf);
3117 if (len > s->max_size)
3118 len = s->max_size;
9977c894 3119 size = tcp_chr_recv(chr, (void *)buf, len);
9894dc0c 3120 if (size == 0 || size == -1) {
6f97dba0 3121 /* connection closed */
7b0bfdf5 3122 tcp_chr_disconnect(chr);
6f97dba0
AL		 3123 } else if (size > 0) {
3124 if (s->do_telnetopt)
3125 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
3126 if (size > 0)
fa5efccb 3127 qemu_chr_be_write(chr, buf, size);
6f97dba0 3128 }
2ea5a7af
AL		 3129
3130 return TRUE;
6f97dba0
AL		 3131}
3132
0ec7b3e7 3133static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len)
7b0bfdf5 3134{
777357d7 3135 SocketChardev *s = SOCKET_CHARDEV(chr);
7b0bfdf5
NN		 3136 int size;
3137
3138 if (!s->connected) {
3139 return 0;
3140 }
3141
3142 size = tcp_chr_recv(chr, (void *) buf, len);
3143 if (size == 0) {
3144 /* connection closed */
3145 tcp_chr_disconnect(chr);
3146 }
3147
3148 return size;
3149}
3150
6f97dba0
AL		 3151static void tcp_chr_connect(void *opaque)
3152{
777357d7
MAL		 3153 Chardev *chr = CHARDEV(opaque);
3154 SocketChardev *s = SOCKET_CHARDEV(opaque);
16cc4ffe 3155
0ff0fad2 3156 g_free(chr->filename);
a8fb5427
DB		 3157 chr->filename = sockaddr_to_str(
3158 &s->sioc->localAddr, s->sioc->localAddrLen,
3159 &s->sioc->remoteAddr, s->sioc->remoteAddrLen,
3160 s->is_listen, s->is_telnet);
6f97dba0
AL		 3161
3162 s->connected = 1;
9894dc0c 3163 if (s->ioc) {
e93a68e1 3164 chr->fd_in_tag = io_add_watch_poll(chr, s->ioc,
9894dc0c 3165 tcp_chr_read_poll,
e92aa36a
ZC		 3166 tcp_chr_read,
3167 chr, NULL);
bbdd2ad0 3168 }
fee204fd 3169 qemu_chr_be_generic_open(chr);
6f97dba0
AL		 3170}
3171
0ec7b3e7 3172static void tcp_chr_update_read_handler(Chardev *chr,
a4afa548 3173 GMainContext *context)
ac1b84dd 3174{
777357d7 3175 SocketChardev *s = SOCKET_CHARDEV(chr);
ac1b84dd 3176
1e94f23d
DB		 3177 if (!s->connected) {
3178 return;
3179 }
3180
ac1b84dd 3181 remove_fd_in_watch(chr);
9894dc0c 3182 if (s->ioc) {
e93a68e1 3183 chr->fd_in_tag = io_add_watch_poll(chr, s->ioc,
9894dc0c 3184 tcp_chr_read_poll,
e92aa36a
ZC		 3185 tcp_chr_read, chr,
3186 context);
ac1b84dd
GH		 3187 }
3188}
3189
f2001a7e 3190typedef struct {
0ec7b3e7 3191 Chardev *chr;
f2001a7e
DB		 3192 char buf[12];
3193 size_t buflen;
3194} TCPCharDriverTelnetInit;
3195
3196static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc,
3197 GIOCondition cond G_GNUC_UNUSED,
3198 gpointer user_data)
6f97dba0 3199{
f2001a7e
DB		 3200 TCPCharDriverTelnetInit *init = user_data;
3201 ssize_t ret;
3202
3203 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL);
3204 if (ret < 0) {
3205 if (ret == QIO_CHANNEL_ERR_BLOCK) {
3206 ret = 0;
3207 } else {
3208 tcp_chr_disconnect(init->chr);
3209 return FALSE;
3210 }
3211 }
3212 init->buflen -= ret;
3213
3214 if (init->buflen == 0) {
3215 tcp_chr_connect(init->chr);
3216 return FALSE;
3217 }
3218
3219 memmove(init->buf, init->buf + ret, init->buflen);
3220
3221 return TRUE;
3222}
3223
0ec7b3e7 3224static void tcp_chr_telnet_init(Chardev *chr)
f2001a7e 3225{
777357d7 3226 SocketChardev *s = SOCKET_CHARDEV(chr);
f2001a7e
DB		 3227 TCPCharDriverTelnetInit *init =
3228 g_new0(TCPCharDriverTelnetInit, 1);
3229 size_t n = 0;
3230
3231 init->chr = chr;
3232 init->buflen = 12;
3233
3234#define IACSET(x, a, b, c) \
3235 do { \
3236 x[n++] = a; \
3237 x[n++] = b; \
3238 x[n++] = c; \
3239 } while (0)
3240
3241 /* Prep the telnet negotion to put telnet in binary,
3242 * no echo, single char mode */
3243 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
3244 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
3245 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
3246 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
3247
3248#undef IACSET
3249
3250 qio_channel_add_watch(
3251 s->ioc, G_IO_OUT,
3252 tcp_chr_telnet_init_io,
3253 init, NULL);
6f97dba0
AL		 3254}
3255
a8fb5427 3256
60e705c5 3257static void tcp_chr_tls_handshake(QIOTask *task,
a8fb5427
DB		 3258 gpointer user_data)
3259{
0ec7b3e7 3260 Chardev *chr = user_data;
1876ed04 3261 SocketChardev *s = user_data;
a8fb5427 3262
60e705c5 3263 if (qio_task_propagate_error(task, NULL)) {
a8fb5427
DB		 3264 tcp_chr_disconnect(chr);
3265 } else {
3266 if (s->do_telnetopt) {
3267 tcp_chr_telnet_init(chr);
3268 } else {
3269 tcp_chr_connect(chr);
3270 }
3271 }
3272}
3273
3274
0ec7b3e7 3275static void tcp_chr_tls_init(Chardev *chr)
a8fb5427 3276{
777357d7 3277 SocketChardev *s = SOCKET_CHARDEV(chr);
a8fb5427
DB		 3278 QIOChannelTLS *tioc;
3279 Error *err = NULL;
e93a68e1 3280 gchar *name;
a8fb5427
DB		 3281
3282 if (s->is_listen) {
3283 tioc = qio_channel_tls_new_server(
3284 s->ioc, s->tls_creds,
3285 NULL, /* XXX Use an ACL */
3286 &err);
3287 } else {
3288 tioc = qio_channel_tls_new_client(
3289 s->ioc, s->tls_creds,
32bafa8f 3290 s->addr->u.inet.data->host,
a8fb5427
DB		 3291 &err);
3292 }
3293 if (tioc == NULL) {
3294 error_free(err);
3295 tcp_chr_disconnect(chr);
660a2d83 3296 return;
a8fb5427 3297 }
e93a68e1
DB		 3298 name = g_strdup_printf("chardev-tls-%s-%s",
3299 s->is_listen ? "server" : "client",
3300 chr->label);
3301 qio_channel_set_name(QIO_CHANNEL(tioc), name);
3302 g_free(name);
a8fb5427
DB		 3303 object_unref(OBJECT(s->ioc));
3304 s->ioc = QIO_CHANNEL(tioc);
3305
3306 qio_channel_tls_handshake(tioc,
3307 tcp_chr_tls_handshake,
3308 chr,
3309 NULL);
3310}
3311
3312
0ec7b3e7 3313static void tcp_chr_set_client_ioc_name(Chardev *chr,
e93a68e1
DB		 3314 QIOChannelSocket *sioc)
3315{
777357d7 3316 SocketChardev *s = SOCKET_CHARDEV(chr);
e93a68e1
DB		 3317 char *name;
3318 name = g_strdup_printf("chardev-tcp-%s-%s",
3319 s->is_listen ? "server" : "client",
3320 chr->label);
3321 qio_channel_set_name(QIO_CHANNEL(sioc), name);
3322 g_free(name);
3323
3324}
3325
0ec7b3e7 3326static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc)
13661089 3327{
777357d7 3328 SocketChardev *s = SOCKET_CHARDEV(chr);
41ac54b2 3329
9894dc0c 3330 if (s->ioc != NULL) {
13661089 3331 return -1;
9894dc0c 3332 }
13661089 3333
9894dc0c
DB		 3334 s->ioc = QIO_CHANNEL(sioc);
3335 object_ref(OBJECT(sioc));
a8fb5427
DB		 3336 s->sioc = sioc;
3337 object_ref(OBJECT(sioc));
9894dc0c 3338
64c800f8
DB		 3339 qio_channel_set_blocking(s->ioc, false, NULL);
3340
9894dc0c
DB		 3341 if (s->do_nodelay) {
3342 qio_channel_set_delay(s->ioc, false);
3343 }
910b6368
PB		 3344 if (s->listen_tag) {
3345 g_source_remove(s->listen_tag);
3346 s->listen_tag = 0;
3347 }
f2001a7e 3348
a8fb5427
DB		 3349 if (s->tls_creds) {
3350 tcp_chr_tls_init(chr);
f2001a7e 3351 } else {
a8fb5427
DB		 3352 if (s->do_telnetopt) {
3353 tcp_chr_telnet_init(chr);
3354 } else {
3355 tcp_chr_connect(chr);
3356 }
f2001a7e 3357 }
13661089
DB		 3358
3359 return 0;
3360}
3361
9894dc0c 3362
0ec7b3e7 3363static int tcp_chr_add_client(Chardev *chr, int fd)
9894dc0c
DB		 3364{
3365 int ret;
3366 QIOChannelSocket *sioc;
3367
3368 sioc = qio_channel_socket_new_fd(fd, NULL);
3369 if (!sioc) {
3370 return -1;
3371 }
e93a68e1 3372 tcp_chr_set_client_ioc_name(chr, sioc);
9894dc0c
DB		 3373 ret = tcp_chr_new_client(chr, sioc);
3374 object_unref(OBJECT(sioc));
3375 return ret;
3376}
3377
3378static gboolean tcp_chr_accept(QIOChannel *channel,
3379 GIOCondition cond,
3380 void *opaque)
6f97dba0 3381{
777357d7 3382 Chardev *chr = CHARDEV(opaque);
9894dc0c 3383 QIOChannelSocket *sioc;
6f97dba0 3384
9894dc0c
DB		 3385 sioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(channel),
3386 NULL);
3387 if (!sioc) {
3388 return TRUE;
6f97dba0 3389 }
9894dc0c 3390
9894dc0c
DB		 3391 tcp_chr_new_client(chr, sioc);
3392
3393 object_unref(OBJECT(sioc));
2ea5a7af
AL		 3394
3395 return TRUE;
6f97dba0
AL		 3396}
3397
0ec7b3e7 3398static int tcp_chr_wait_connected(Chardev *chr, Error **errp)
d7a04fd7 3399{
777357d7 3400 SocketChardev *s = SOCKET_CHARDEV(chr);
d7a04fd7
MAL		 3401 QIOChannelSocket *sioc;
3402
1dc8a669
MAL		 3403 /* It can't wait on s->connected, since it is set asynchronously
3404 * in TLS and telnet cases, only wait for an accepted socket */
3405 while (!s->ioc) {
d7a04fd7 3406 if (s->is_listen) {
776a32a0
MAL		 3407 error_report("QEMU waiting for connection on: %s",
3408 chr->filename);
d7a04fd7
MAL		 3409 qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), true, NULL);
3410 tcp_chr_accept(QIO_CHANNEL(s->listen_ioc), G_IO_IN, chr);
3411 qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), false, NULL);
3412 } else {
3413 sioc = qio_channel_socket_new();
e93a68e1 3414 tcp_chr_set_client_ioc_name(chr, sioc);
d7a04fd7
MAL		 3415 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) {
3416 object_unref(OBJECT(sioc));
3417 return -1;
3418 }
3419 tcp_chr_new_client(chr, sioc);
3420 object_unref(OBJECT(sioc));
3421 }
3422 }
3423
3424 return 0;
3425}
3426
0ec7b3e7 3427static int qemu_chr_wait_connected(Chardev *chr, Error **errp)
6b6723c3 3428{
777357d7
MAL		 3429 ChardevClass *cc = CHARDEV_GET_CLASS(chr);
3430
3431 if (cc->chr_wait_connected) {
3432 return cc->chr_wait_connected(chr, errp);
6b6723c3
MAL		 3433 }
3434
3435 return 0;
3436}
3437
5345fdb4
MAL		 3438int qemu_chr_fe_wait_connected(CharBackend *be, Error **errp)
3439{
fa394ed6
MAL		 3440 if (!be->chr) {
3441 error_setg(errp, "missing associated backend");
3442 return -1;
3443 }
3444
5345fdb4
MAL		 3445 return qemu_chr_wait_connected(be->chr, errp);
3446}
3447
0ec7b3e7 3448static void tcp_chr_free(Chardev *chr)
6f97dba0 3449{
777357d7 3450 SocketChardev *s = SOCKET_CHARDEV(chr);
5b498459
MAL		 3451
3452 tcp_chr_free_connection(chr);
cfb429cb 3453
5dd1f02b
CM		 3454 if (s->reconnect_timer) {
3455 g_source_remove(s->reconnect_timer);
3456 s->reconnect_timer = 0;
3457 }
cfb429cb 3458 qapi_free_SocketAddress(s->addr);
9894dc0c
DB		 3459 if (s->listen_tag) {
3460 g_source_remove(s->listen_tag);
3461 s->listen_tag = 0;
3462 }
3463 if (s->listen_ioc) {
3464 object_unref(OBJECT(s->listen_ioc));
819f56b7 3465 }
a8fb5427
DB		 3466 if (s->tls_creds) {
3467 object_unref(OBJECT(s->tls_creds));
3468 }
41ac54b2 3469
a425d23f 3470 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
6f97dba0
AL		 3471}
3472
43ded1a0 3473
60e705c5 3474static void qemu_chr_socket_connected(QIOTask *task, void *opaque)
5dd1f02b 3475{
60e705c5 3476 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
777357d7
MAL		 3477 Chardev *chr = CHARDEV(opaque);
3478 SocketChardev *s = SOCKET_CHARDEV(chr);
60e705c5 3479 Error *err = NULL;
5dd1f02b 3480
60e705c5 3481 if (qio_task_propagate_error(task, &err)) {
5008e5b7 3482 check_report_connect_error(chr, err);
60e705c5
DB		 3483 error_free(err);
3484 goto cleanup;
5dd1f02b
CM		 3485 }
3486
5008e5b7 3487 s->connect_err_reported = false;
f50dfe45 3488 tcp_chr_new_client(chr, sioc);
60e705c5
DB		 3489
3490 cleanup:
f50dfe45 3491 object_unref(OBJECT(sioc));
5dd1f02b
CM		 3492}
3493
f6bd5d6e 3494
51767e7c 3495/*********************************************************/
3949e594 3496/* Ring buffer chardev */
51767e7c
LL		 3497
3498typedef struct {
0ec7b3e7 3499 Chardev parent;
51767e7c
LL		 3500 size_t size;
3501 size_t prod;
3502 size_t cons;
3503 uint8_t *cbuf;
0ec7b3e7 3504} RingBufChardev;
51767e7c 3505
777357d7
MAL		 3506#define RINGBUF_CHARDEV(obj) \
3507 OBJECT_CHECK(RingBufChardev, (obj), TYPE_CHARDEV_RINGBUF)
3508
0ec7b3e7 3509static size_t ringbuf_count(const Chardev *chr)
51767e7c 3510{
777357d7 3511 const RingBufChardev *d = RINGBUF_CHARDEV(chr);
51767e7c 3512
5c230105 3513 return d->prod - d->cons;
51767e7c
LL		 3514}
3515
9005b2a7 3516/* Called with chr_write_lock held. */
0ec7b3e7 3517static int ringbuf_chr_write(Chardev *chr, const uint8_t *buf, int len)
51767e7c 3518{
777357d7 3519 RingBufChardev *d = RINGBUF_CHARDEV(chr);
51767e7c
LL		 3520 int i;
3521
3522 if (!buf || (len < 0)) {
3523 return -1;
3524 }
3525
3526 for (i = 0; i < len; i++ ) {
5c230105
MA		 3527 d->cbuf[d->prod++ & (d->size - 1)] = buf[i];
3528 if (d->prod - d->cons > d->size) {
51767e7c
LL		 3529 d->cons = d->prod - d->size;
3530 }
3531 }
3532
5c936a83 3533 return len;
51767e7c
LL		 3534}
3535
0ec7b3e7 3536static int ringbuf_chr_read(Chardev *chr, uint8_t *buf, int len)
51767e7c 3537{
777357d7 3538 RingBufChardev *d = RINGBUF_CHARDEV(chr);
51767e7c
LL		 3539 int i;
3540
9005b2a7 3541 qemu_mutex_lock(&chr->chr_write_lock);
5c230105
MA		 3542 for (i = 0; i < len && d->cons != d->prod; i++) {
3543 buf[i] = d->cbuf[d->cons++ & (d->size - 1)];
51767e7c 3544 }
9005b2a7 3545 qemu_mutex_unlock(&chr->chr_write_lock);
51767e7c
LL		 3546
3547 return i;
3548}
3549
0ec7b3e7 3550static void ringbuf_chr_free(struct Chardev *chr)
51767e7c 3551{
777357d7 3552 RingBufChardev *d = RINGBUF_CHARDEV(chr);
51767e7c
LL		 3553
3554 g_free(d->cbuf);
51767e7c
LL		 3555}
3556
777357d7
MAL		 3557static void qemu_chr_open_ringbuf(Chardev *chr,
3558 ChardevBackend *backend,
3559 bool *be_opened,
3560 Error **errp)
51767e7c 3561{
32bafa8f 3562 ChardevRingbuf *opts = backend->u.ringbuf.data;
777357d7 3563 RingBufChardev *d = RINGBUF_CHARDEV(chr);
51767e7c 3564
1da48c65 3565 d->size = opts->has_size ? opts->size : 65536;
51767e7c
LL		 3566
3567 /* The size must be power of 2 */
3568 if (d->size & (d->size - 1)) {
4f57378f 3569 error_setg(errp, "size of ringbuf chardev must be power of two");
777357d7 3570 return;
51767e7c
LL		 3571 }
3572
3573 d->prod = 0;
3574 d->cons = 0;
3575 d->cbuf = g_malloc0(d->size);
1f590cf9
LL		 3576}
3577
3949e594 3578void qmp_ringbuf_write(const char *device, const char *data,
82e59a67 3579 bool has_format, enum DataFormat format,
1f590cf9
LL		 3580 Error **errp)
3581{
0ec7b3e7 3582 Chardev *chr;
c4f331b6 3583 const uint8_t *write_data;
1f590cf9 3584 int ret;
3d1bba20 3585 gsize write_count;
1f590cf9
LL		 3586
3587 chr = qemu_chr_find(device);
3588 if (!chr) {
1a69278e 3589 error_setg(errp, "Device '%s' not found", device);
1f590cf9
LL		 3590 return;
3591 }
3592
777357d7 3593 if (!CHARDEV_IS_RINGBUF(chr)) {
3949e594 3594 error_setg(errp,"%s is not a ringbuf device", device);
1f590cf9
LL		 3595 return;
3596 }
3597
1f590cf9 3598 if (has_format && (format == DATA_FORMAT_BASE64)) {
e9cf2fe0
DB		 3599 write_data = qbase64_decode(data, -1,
3600 &write_count,
3601 errp);
3602 if (!write_data) {
3603 return;
3604 }
1f590cf9
LL		 3605 } else {
3606 write_data = (uint8_t *)data;
82e59a67 3607 write_count = strlen(data);
1f590cf9
LL		 3608 }
3609
3949e594 3610 ret = ringbuf_chr_write(chr, write_data, write_count);
1f590cf9 3611
13289fb5
MA		 3612 if (write_data != (uint8_t *)data) {
3613 g_free((void *)write_data);
3614 }
3615
1f590cf9
LL		 3616 if (ret < 0) {
3617 error_setg(errp, "Failed to write to device %s", device);
3618 return;
3619 }
3620}
3621
3949e594 3622char *qmp_ringbuf_read(const char *device, int64_t size,
3ab651fc
MA		 3623 bool has_format, enum DataFormat format,
3624 Error **errp)
49b6d722 3625{
0ec7b3e7 3626 Chardev *chr;
c4f331b6 3627 uint8_t *read_data;
49b6d722 3628 size_t count;
3ab651fc 3629 char *data;
49b6d722
LL		 3630
3631 chr = qemu_chr_find(device);
3632 if (!chr) {
1a69278e 3633 error_setg(errp, "Device '%s' not found", device);
49b6d722
LL		 3634 return NULL;
3635 }
3636
777357d7 3637 if (!CHARDEV_IS_RINGBUF(chr)) {
3949e594 3638 error_setg(errp,"%s is not a ringbuf device", device);
49b6d722
LL		 3639 return NULL;
3640 }
3641
3642 if (size <= 0) {
3643 error_setg(errp, "size must be greater than zero");
3644 return NULL;
3645 }
3646
3949e594 3647 count = ringbuf_count(chr);
49b6d722 3648 size = size > count ? count : size;
44f3bcd2 3649 read_data = g_malloc(size + 1);
49b6d722 3650
3949e594 3651 ringbuf_chr_read(chr, read_data, size);
49b6d722
LL		 3652
3653 if (has_format && (format == DATA_FORMAT_BASE64)) {
3ab651fc 3654 data = g_base64_encode(read_data, size);
13289fb5 3655 g_free(read_data);
49b6d722 3656 } else {
3949e594
MA		 3657 /*
3658 * FIXME should read only complete, valid UTF-8 characters up
3659 * to @size bytes. Invalid sequences should be replaced by a
3660 * suitable replacement character. Except when (and only
3661 * when) ring buffer lost characters since last read, initial
3662 * continuation characters should be dropped.
3663 */
44f3bcd2 3664 read_data[size] = 0;
3ab651fc 3665 data = (char *)read_data;
49b6d722
LL		 3666 }
3667
3ab651fc 3668 return data;
49b6d722
LL		 3669}
3670
33521634 3671QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
191bc01b 3672{
6ea314d9 3673 char host[65], port[33], width[8], height[8];
aeb2c47a 3674 int pos;
7d31544f 3675 const char *p;
191bc01b 3676 QemuOpts *opts;
8be7e7e4 3677 Error *local_err = NULL;
191bc01b 3678
8be7e7e4 3679 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
84d18f06 3680 if (local_err) {
33394884 3681 error_report_err(local_err);
191bc01b 3682 return NULL;
8be7e7e4 3683 }
191bc01b 3684
7591c5c1
GH		 3685 if (strstart(filename, "mon:", &p)) {
3686 filename = p;
f43e47db 3687 qemu_opt_set(opts, "mux", "on", &error_abort);
02c4bdf1
PB		 3688 if (strcmp(filename, "stdio") == 0) {
3689 /* Monitor is muxed to stdio: do not exit on Ctrl+C by default
3690 * but pass it to the guest. Handle this only for compat syntax,
3691 * for -chardev syntax we have special option for this.
3692 * This is what -nographic did, redirecting+muxing serial+monitor
3693 * to stdio causing Ctrl+C to be passed to guest. */
f43e47db 3694 qemu_opt_set(opts, "signal", "off", &error_abort);
02c4bdf1 3695 }
7591c5c1
GH		 3696 }
3697
f0457e8d
GH		 3698 if (strcmp(filename, "null") == 0 ||
3699 strcmp(filename, "pty") == 0 ||
3700 strcmp(filename, "msmouse") == 0 ||
dc1c21e6 3701 strcmp(filename, "braille") == 0 ||
5692399f 3702 strcmp(filename, "testdev") == 0 ||
f0457e8d 3703 strcmp(filename, "stdio") == 0) {
f43e47db 3704 qemu_opt_set(opts, "backend", filename, &error_abort);
191bc01b
GH		 3705 return opts;
3706 }
6ea314d9 3707 if (strstart(filename, "vc", &p)) {
f43e47db 3708 qemu_opt_set(opts, "backend", "vc", &error_abort);
6ea314d9 3709 if (*p == ':') {
49aa4058 3710 if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
6ea314d9 3711 /* pixels */
f43e47db
MA		 3712 qemu_opt_set(opts, "width", width, &error_abort);
3713 qemu_opt_set(opts, "height", height, &error_abort);
49aa4058 3714 } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
6ea314d9 3715 /* chars */
f43e47db
MA		 3716 qemu_opt_set(opts, "cols", width, &error_abort);
3717 qemu_opt_set(opts, "rows", height, &error_abort);
6ea314d9
GH		 3718 } else {
3719 goto fail;
3720 }
3721 }
3722 return opts;
3723 }
d6c983cd 3724 if (strcmp(filename, "con:") == 0) {
f43e47db 3725 qemu_opt_set(opts, "backend", "console", &error_abort);
d6c983cd
GH		 3726 return opts;
3727 }
48b76496 3728 if (strstart(filename, "COM", NULL)) {
f43e47db
MA		 3729 qemu_opt_set(opts, "backend", "serial", &error_abort);
3730 qemu_opt_set(opts, "path", filename, &error_abort);
48b76496
GH		 3731 return opts;
3732 }
7d31544f 3733 if (strstart(filename, "file:", &p)) {
f43e47db
MA		 3734 qemu_opt_set(opts, "backend", "file", &error_abort);
3735 qemu_opt_set(opts, "path", p, &error_abort);
7d31544f
GH		 3736 return opts;
3737 }
3738 if (strstart(filename, "pipe:", &p)) {
f43e47db
MA		 3739 qemu_opt_set(opts, "backend", "pipe", &error_abort);
3740 qemu_opt_set(opts, "path", p, &error_abort);
7d31544f
GH		 3741 return opts;
3742 }
aeb2c47a
GH		 3743 if (strstart(filename, "tcp:", &p) ||
3744 strstart(filename, "telnet:", &p)) {
3745 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3746 host[0] = 0;
3747 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
3748 goto fail;
3749 }
f43e47db
MA		 3750 qemu_opt_set(opts, "backend", "socket", &error_abort);
3751 qemu_opt_set(opts, "host", host, &error_abort);
3752 qemu_opt_set(opts, "port", port, &error_abort);
aeb2c47a 3753 if (p[pos] == ',') {
dc523cd3
MA		 3754 qemu_opts_do_parse(opts, p+pos+1, NULL, &local_err);
3755 if (local_err) {
3756 error_report_err(local_err);
aeb2c47a 3757 goto fail;
dc523cd3 3758 }
aeb2c47a
GH		 3759 }
3760 if (strstart(filename, "telnet:", &p))
f43e47db 3761 qemu_opt_set(opts, "telnet", "on", &error_abort);
aeb2c47a
GH		 3762 return opts;
3763 }
7e1b35b4 3764 if (strstart(filename, "udp:", &p)) {
f43e47db 3765 qemu_opt_set(opts, "backend", "udp", &error_abort);
7e1b35b4
GH		 3766 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
3767 host[0] = 0;
39324ca4 3768 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
7e1b35b4
GH		 3769 goto fail;
3770 }
3771 }
f43e47db
MA		 3772 qemu_opt_set(opts, "host", host, &error_abort);
3773 qemu_opt_set(opts, "port", port, &error_abort);
7e1b35b4
GH		 3774 if (p[pos] == '@') {
3775 p += pos + 1;
3776 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
3777 host[0] = 0;
3778 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
7e1b35b4
GH		 3779 goto fail;
3780 }
3781 }
f43e47db
MA		 3782 qemu_opt_set(opts, "localaddr", host, &error_abort);
3783 qemu_opt_set(opts, "localport", port, &error_abort);
7e1b35b4
GH		 3784 }
3785 return opts;
3786 }
aeb2c47a 3787 if (strstart(filename, "unix:", &p)) {
f43e47db 3788 qemu_opt_set(opts, "backend", "socket", &error_abort);
dc523cd3
MA		 3789 qemu_opts_do_parse(opts, p, "path", &local_err);
3790 if (local_err) {
3791 error_report_err(local_err);
aeb2c47a 3792 goto fail;
dc523cd3 3793 }
aeb2c47a
GH		 3794 return opts;
3795 }
48b76496
GH		 3796 if (strstart(filename, "/dev/parport", NULL) ||
3797 strstart(filename, "/dev/ppi", NULL)) {
f43e47db
MA		 3798 qemu_opt_set(opts, "backend", "parport", &error_abort);
3799 qemu_opt_set(opts, "path", filename, &error_abort);
48b76496
GH		 3800 return opts;
3801 }
3802 if (strstart(filename, "/dev/", NULL)) {
f43e47db
MA		 3803 qemu_opt_set(opts, "backend", "tty", &error_abort);
3804 qemu_opt_set(opts, "path", filename, &error_abort);
48b76496
GH		 3805 return opts;
3806 }
191bc01b 3807
aeb2c47a 3808fail:
191bc01b
GH		 3809 qemu_opts_del(opts);
3810 return NULL;
3811}
3812
21a933ea 3813void qemu_chr_parse_common(QemuOpts *opts, ChardevCommon *backend)
d0d7708b
DB		 3814{
3815 const char *logfile = qemu_opt_get(opts, "logfile");
3816
3817 backend->has_logfile = logfile != NULL;
3818 backend->logfile = logfile ? g_strdup(logfile) : NULL;
3819
3820 backend->has_logappend = true;
3821 backend->logappend = qemu_opt_get_bool(opts, "logappend", false);
3822}
3823
3824
846e2e49
GH		 3825static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
3826 Error **errp)
3827{
3828 const char *path = qemu_opt_get(opts, "path");
f194a1ae 3829 ChardevFile *file;
846e2e49
GH		 3830
3831 if (path == NULL) {
3832 error_setg(errp, "chardev: file: no filename given");
3833 return;
3834 }
32bafa8f 3835 file = backend->u.file.data = g_new0(ChardevFile, 1);
f194a1ae
EB		 3836 qemu_chr_parse_common(opts, qapi_ChardevFile_base(file));
3837 file->out = g_strdup(path);
31e38a22 3838
f194a1ae
EB		 3839 file->has_append = true;
3840 file->append = qemu_opt_get_bool(opts, "append", false);
846e2e49
GH		 3841}
3842
7c358031
GH		 3843static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend,
3844 Error **errp)
3845{
f194a1ae
EB		 3846 ChardevStdio *stdio;
3847
32bafa8f 3848 stdio = backend->u.stdio.data = g_new0(ChardevStdio, 1);
f194a1ae
EB		 3849 qemu_chr_parse_common(opts, qapi_ChardevStdio_base(stdio));
3850 stdio->has_signal = true;
3851 stdio->signal = qemu_opt_get_bool(opts, "signal", true);
7c358031
GH		 3852}
3853
b68e956a
MAL		 3854static const CharDriver stdio_driver = {
3855 .kind = CHARDEV_BACKEND_KIND_STDIO,
3856 .parse = qemu_chr_parse_stdio,
777357d7
MAL		 3857};
3858
3859static void char_stdio_class_init(ObjectClass *oc, void *data)
3860{
3861 ChardevClass *cc = CHARDEV_CLASS(oc);
3862
3863 cc->open = qemu_chr_open_stdio;
b68e956a 3864#ifdef _WIN32
777357d7
MAL		 3865 cc->chr_write = win_stdio_write;
3866 cc->chr_set_echo = qemu_chr_set_echo_win_stdio;
3867 cc->chr_free = win_stdio_free;
b68e956a 3868#else
777357d7
MAL		 3869 cc->chr_set_echo = qemu_chr_set_echo_stdio;
3870 cc->chr_free = qemu_chr_free_stdio;
b68e956a 3871#endif
777357d7
MAL		 3872}
3873
3874static const TypeInfo char_stdio_type_info = {
3875 .name = TYPE_CHARDEV_STDIO,
3876#ifdef _WIN32
3877 .parent = TYPE_CHARDEV_WIN_STDIO,
3878#else
3879 .parent = TYPE_CHARDEV_FD,
3880#endif
3881 .class_init = char_stdio_class_init,
b68e956a
MAL		 3882};
3883
6511d396 3884#ifdef HAVE_CHARDEV_SERIAL
0f1cb51d
GH		 3885static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
3886 Error **errp)
3887{
3888 const char *device = qemu_opt_get(opts, "path");
f194a1ae 3889 ChardevHostdev *serial;
0f1cb51d
GH		 3890
3891 if (device == NULL) {
3892 error_setg(errp, "chardev: serial/tty: no device path given");
3893 return;
3894 }
32bafa8f 3895 serial = backend->u.serial.data = g_new0(ChardevHostdev, 1);
f194a1ae
EB		 3896 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(serial));
3897 serial->device = g_strdup(device);
0f1cb51d 3898}
6511d396 3899#endif
0f1cb51d 3900
38bfb1a6 3901#ifdef HAVE_CHARDEV_PARPORT
dc375097
GH		 3902static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend,
3903 Error **errp)
3904{
3905 const char *device = qemu_opt_get(opts, "path");
f194a1ae 3906 ChardevHostdev *parallel;
dc375097
GH		 3907
3908 if (device == NULL) {
3909 error_setg(errp, "chardev: parallel: no device path given");
3910 return;
3911 }
32bafa8f 3912 parallel = backend->u.parallel.data = g_new0(ChardevHostdev, 1);
f194a1ae
EB		 3913 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(parallel));
3914 parallel->device = g_strdup(device);
dc375097 3915}
38bfb1a6 3916#endif
dc375097 3917
548cbb36
GH		 3918static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
3919 Error **errp)
3920{
3921 const char *device = qemu_opt_get(opts, "path");
f194a1ae 3922 ChardevHostdev *dev;
548cbb36
GH		 3923
3924 if (device == NULL) {
3925 error_setg(errp, "chardev: pipe: no device path given");
3926 return;
3927 }
32bafa8f 3928 dev = backend->u.pipe.data = g_new0(ChardevHostdev, 1);
f194a1ae
EB		 3929 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(dev));
3930 dev->device = g_strdup(device);
548cbb36
GH		 3931}
3932
b68e956a
MAL		 3933static const CharDriver pipe_driver = {
3934 .kind = CHARDEV_BACKEND_KIND_PIPE,
3935 .parse = qemu_chr_parse_pipe,
777357d7
MAL		 3936};
3937
3938static void char_pipe_class_init(ObjectClass *oc, void *data)
3939{
3940 ChardevClass *cc = CHARDEV_CLASS(oc);
3941
3942 cc->open = qemu_chr_open_pipe;
3943}
3944
3945static const TypeInfo char_pipe_type_info = {
3946 .name = TYPE_CHARDEV_PIPE,
b68e956a 3947#ifdef _WIN32
777357d7 3948 .parent = TYPE_CHARDEV_WIN,
b68e956a 3949#else
777357d7 3950 .parent = TYPE_CHARDEV_FD,
b68e956a 3951#endif
777357d7 3952 .class_init = char_pipe_class_init,
b68e956a
MAL		 3953};
3954
4f57378f
MA		 3955static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend,
3956 Error **errp)
1da48c65
GH		 3957{
3958 int val;
f194a1ae 3959 ChardevRingbuf *ringbuf;
1da48c65 3960
32bafa8f 3961 ringbuf = backend->u.ringbuf.data = g_new0(ChardevRingbuf, 1);
f194a1ae 3962 qemu_chr_parse_common(opts, qapi_ChardevRingbuf_base(ringbuf));
1da48c65 3963
0f953051 3964 val = qemu_opt_get_size(opts, "size", 0);
1da48c65 3965 if (val != 0) {
f194a1ae
EB		 3966 ringbuf->has_size = true;
3967 ringbuf->size = val;
1da48c65
GH		 3968 }
3969}
3970
b68e956a
MAL		 3971static const CharDriver ringbuf_driver = {
3972 .kind = CHARDEV_BACKEND_KIND_RINGBUF,
3973 .parse = qemu_chr_parse_ringbuf,
777357d7
MAL		 3974};
3975
3976static void char_ringbuf_class_init(ObjectClass *oc, void *data)
3977{
3978 ChardevClass *cc = CHARDEV_CLASS(oc);
3979
3980 cc->open = qemu_chr_open_ringbuf;
3981 cc->chr_write = ringbuf_chr_write;
3982 cc->chr_free = ringbuf_chr_free;
3983}
3984
3985static const TypeInfo char_ringbuf_type_info = {
3986 .name = TYPE_CHARDEV_RINGBUF,
3987 .parent = TYPE_CHARDEV,
3988 .class_init = char_ringbuf_class_init,
3989 .instance_size = sizeof(RingBufChardev),
b68e956a
MAL		 3990};
3991
3992/* Bug-compatibility: */
3993static const CharDriver memory_driver = {
3994 .kind = CHARDEV_BACKEND_KIND_MEMORY,
3995 .parse = qemu_chr_parse_ringbuf,
777357d7
MAL		 3996};
3997
3998static const TypeInfo char_memory_type_info = {
3999 .name = TYPE_CHARDEV_MEMORY,
4000 .parent = TYPE_CHARDEV_RINGBUF,
b68e956a
MAL		 4001};
4002
bb6fb7c0
GH		 4003static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
4004 Error **errp)
4005{
4006 const char *chardev = qemu_opt_get(opts, "chardev");
f194a1ae 4007 ChardevMux *mux;
bb6fb7c0
GH		 4008
4009 if (chardev == NULL) {
4010 error_setg(errp, "chardev: mux: no chardev given");
4011 return;
4012 }
32bafa8f 4013 mux = backend->u.mux.data = g_new0(ChardevMux, 1);
f194a1ae
EB		 4014 qemu_chr_parse_common(opts, qapi_ChardevMux_base(mux));
4015 mux->chardev = g_strdup(chardev);
bb6fb7c0
GH		 4016}
4017
b68e956a
MAL		 4018static const CharDriver mux_driver = {
4019 .kind = CHARDEV_BACKEND_KIND_MUX,
4020 .parse = qemu_chr_parse_mux,
777357d7
MAL		 4021};
4022
4023static void char_mux_class_init(ObjectClass *oc, void *data)
4024{
4025 ChardevClass *cc = CHARDEV_CLASS(oc);
4026
4027 cc->open = qemu_chr_open_mux;
4028 cc->chr_free = mux_chr_free;
4029 cc->chr_write = mux_chr_write;
4030 cc->chr_accept_input = mux_chr_accept_input;
4031 cc->chr_add_watch = mux_chr_add_watch;
4032}
4033
4034static const TypeInfo char_mux_type_info = {
4035 .name = TYPE_CHARDEV_MUX,
4036 .parent = TYPE_CHARDEV,
4037 .class_init = char_mux_class_init,
4038 .instance_size = sizeof(MuxChardev),
b68e956a
MAL		 4039};
4040
dafd325d
PM		 4041static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
4042 Error **errp)
4043{
4044 bool is_listen = qemu_opt_get_bool(opts, "server", false);
4045 bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true);
4046 bool is_telnet = qemu_opt_get_bool(opts, "telnet", false);
4047 bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true);
5dd1f02b 4048 int64_t reconnect = qemu_opt_get_number(opts, "reconnect", 0);
dafd325d
PM		 4049 const char *path = qemu_opt_get(opts, "path");
4050 const char *host = qemu_opt_get(opts, "host");
4051 const char *port = qemu_opt_get(opts, "port");
a8fb5427 4052 const char *tls_creds = qemu_opt_get(opts, "tls-creds");
dafd325d 4053 SocketAddress *addr;
f194a1ae 4054 ChardevSocket *sock;
dafd325d
PM		 4055
4056 if (!path) {
4057 if (!host) {
4058 error_setg(errp, "chardev: socket: no host given");
4059 return;
4060 }
4061 if (!port) {
4062 error_setg(errp, "chardev: socket: no port given");
4063 return;
4064 }
a8fb5427
DB		 4065 } else {
4066 if (tls_creds) {
4067 error_setg(errp, "TLS can only be used over TCP socket");
4068 return;
4069 }
dafd325d
PM		 4070 }
4071
32bafa8f 4072 sock = backend->u.socket.data = g_new0(ChardevSocket, 1);
f194a1ae 4073 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock));
dafd325d 4074
f194a1ae
EB		 4075 sock->has_nodelay = true;
4076 sock->nodelay = do_nodelay;
4077 sock->has_server = true;
4078 sock->server = is_listen;
4079 sock->has_telnet = true;
4080 sock->telnet = is_telnet;
4081 sock->has_wait = true;
4082 sock->wait = is_waitconnect;
4083 sock->has_reconnect = true;
4084 sock->reconnect = reconnect;
4085 sock->tls_creds = g_strdup(tls_creds);
dafd325d
PM		 4086
4087 addr = g_new0(SocketAddress, 1);
4088 if (path) {
0399293e 4089 UnixSocketAddress *q_unix;
130257dc 4090 addr->type = SOCKET_ADDRESS_KIND_UNIX;
32bafa8f 4091 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1);
0399293e 4092 q_unix->path = g_strdup(path);
dafd325d 4093 } else {
130257dc 4094 addr->type = SOCKET_ADDRESS_KIND_INET;
32bafa8f
EB		 4095 addr->u.inet.data = g_new(InetSocketAddress, 1);
4096 *addr->u.inet.data = (InetSocketAddress) {
0399293e
EB		 4097 .host = g_strdup(host),
4098 .port = g_strdup(port),
4099 .has_to = qemu_opt_get(opts, "to"),
4100 .to = qemu_opt_get_number(opts, "to", 0),
4101 .has_ipv4 = qemu_opt_get(opts, "ipv4"),
4102 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0),
4103 .has_ipv6 = qemu_opt_get(opts, "ipv6"),
4104 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0),
4105 };
dafd325d 4106 }
f194a1ae 4107 sock->addr = addr;
dafd325d
PM		 4108}
4109
90a14bfe
PM		 4110static void qemu_chr_parse_udp(QemuOpts *opts, ChardevBackend *backend,
4111 Error **errp)
4112{
4113 const char *host = qemu_opt_get(opts, "host");
4114 const char *port = qemu_opt_get(opts, "port");
4115 const char *localaddr = qemu_opt_get(opts, "localaddr");
4116 const char *localport = qemu_opt_get(opts, "localport");
4117 bool has_local = false;
4118 SocketAddress *addr;
f194a1ae 4119 ChardevUdp *udp;
90a14bfe
PM		 4120
4121 if (host == NULL || strlen(host) == 0) {
4122 host = "localhost";
4123 }
4124 if (port == NULL || strlen(port) == 0) {
4125 error_setg(errp, "chardev: udp: remote port not specified");
4126 return;
4127 }
4128 if (localport == NULL || strlen(localport) == 0) {
4129 localport = "0";
4130 } else {
4131 has_local = true;
4132 }
4133 if (localaddr == NULL || strlen(localaddr) == 0) {
4134 localaddr = "";
4135 } else {
4136 has_local = true;
4137 }
4138
32bafa8f 4139 udp = backend->u.udp.data = g_new0(ChardevUdp, 1);
f194a1ae 4140 qemu_chr_parse_common(opts, qapi_ChardevUdp_base(udp));
90a14bfe
PM		 4141
4142 addr = g_new0(SocketAddress, 1);
130257dc 4143 addr->type = SOCKET_ADDRESS_KIND_INET;
32bafa8f
EB		 4144 addr->u.inet.data = g_new(InetSocketAddress, 1);
4145 *addr->u.inet.data = (InetSocketAddress) {
0399293e
EB		 4146 .host = g_strdup(host),
4147 .port = g_strdup(port),
4148 .has_ipv4 = qemu_opt_get(opts, "ipv4"),
4149 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0),
4150 .has_ipv6 = qemu_opt_get(opts, "ipv6"),
4151 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0),
4152 };
f194a1ae 4153 udp->remote = addr;
90a14bfe
PM		 4154
4155 if (has_local) {
f194a1ae 4156 udp->has_local = true;
90a14bfe 4157 addr = g_new0(SocketAddress, 1);
130257dc 4158 addr->type = SOCKET_ADDRESS_KIND_INET;
32bafa8f
EB		 4159 addr->u.inet.data = g_new(InetSocketAddress, 1);
4160 *addr->u.inet.data = (InetSocketAddress) {
0399293e
EB		 4161 .host = g_strdup(localaddr),
4162 .port = g_strdup(localport),
4163 };
f194a1ae 4164 udp->local = addr;
90a14bfe
PM		 4165 }
4166}
4167
a1698bf1 4168static const CharDriver *backends[CHARDEV_BACKEND_KIND__MAX];
d654f34e 4169
0b812f31 4170void register_char_driver(const CharDriver *driver)
2c5f4882 4171{
a1698bf1 4172 backends[driver->kind] = driver;
2c5f4882
GH		 4173}
4174
0ec7b3e7
MAL		 4175Chardev *qemu_chr_new_from_opts(QemuOpts *opts,
4176 Error **errp)
191bc01b 4177{
0aff637e 4178 Error *local_err = NULL;
a1698bf1 4179 const CharDriver *cd = NULL;
0ec7b3e7 4180 Chardev *chr;
a1698bf1 4181 int i;
a61ae7f8
PM		 4182 ChardevReturn *ret = NULL;
4183 ChardevBackend *backend;
0b812f31 4184 const char *name = qemu_opt_get(opts, "backend");
a61ae7f8
PM		 4185 const char *id = qemu_opts_id(opts);
4186 char *bid = NULL;
191bc01b 4187
0b812f31 4188 if (name == NULL) {
312fd5f2 4189 error_setg(errp, "chardev: \"%s\" missing backend",
bd2d80b2 4190 qemu_opts_id(opts));
2274ae9d 4191 goto err;
1bbd185f 4192 }
517b3d40 4193
0b812f31 4194 if (is_help_option(name)) {
776a32a0 4195 GString *str = g_string_new("");
a1698bf1
MAL		 4196 for (i = 0; i < ARRAY_SIZE(backends); i++) {
4197 cd = backends[i];
4198 if (cd) {
776a32a0 4199 g_string_append_printf(str, "\n%s", ChardevBackendKind_lookup[cd->kind]);
a1698bf1 4200 if (cd->alias) {
776a32a0 4201 g_string_append_printf(str, "\n%s", cd->alias);
a1698bf1 4202 }
0b812f31 4203 }
517b3d40 4204 }
776a32a0
MAL		 4205
4206 error_report("Available chardev backend types: %s", str->str);
4207 g_string_free(str, true);
0b812f31 4208 exit(0);
517b3d40
LM		 4209 }
4210
4211 if (id == NULL) {
4212 error_setg(errp, "chardev: no id specified");
4213 goto err;
4214 }
4215
a1698bf1
MAL		 4216 for (i = 0; i < ARRAY_SIZE(backends); i++) {
4217 cd = backends[i];
4218 if (!cd) {
4219 continue;
4220 }
0b812f31
MAL		 4221 if (g_strcmp0(ChardevBackendKind_lookup[cd->kind], name) == 0 ||
4222 g_strcmp0(cd->alias, name) == 0) {
191bc01b 4223 break;
d654f34e 4224 }
191bc01b 4225 }
a1698bf1 4226 if (i == ARRAY_SIZE(backends)) {
0b812f31 4227 error_setg(errp, "chardev: backend \"%s\" not found", name);
e668287d 4228 goto err;
191bc01b
GH		 4229 }
4230
a61ae7f8 4231 backend = g_new0(ChardevBackend, 1);
edb2fb3c 4232
a61ae7f8
PM		 4233 if (qemu_opt_get_bool(opts, "mux", 0)) {
4234 bid = g_strdup_printf("%s-base", id);
4235 }
2c5f4882 4236
a61ae7f8 4237 chr = NULL;
130257dc 4238 backend->type = cd->kind;
a61ae7f8
PM		 4239 if (cd->parse) {
4240 cd->parse(opts, backend, &local_err);
4241 if (local_err) {
4242 error_propagate(errp, local_err);
2c5f4882
GH		 4243 goto qapi_out;
4244 }
d0d7708b
DB		 4245 } else {
4246 ChardevCommon *cc = g_new0(ChardevCommon, 1);
4247 qemu_chr_parse_common(opts, cc);
32bafa8f 4248 backend->u.null.data = cc; /* Any ChardevCommon member would work */
2c5f4882 4249 }
d0d7708b 4250
a61ae7f8
PM		 4251 ret = qmp_chardev_add(bid ? bid : id, backend, errp);
4252 if (!ret) {
4253 goto qapi_out;
191bc01b
GH		 4254 }
4255
a61ae7f8
PM		 4256 if (bid) {
4257 qapi_free_ChardevBackend(backend);
4258 qapi_free_ChardevReturn(ret);
4259 backend = g_new0(ChardevBackend, 1);
32bafa8f 4260 backend->u.mux.data = g_new0(ChardevMux, 1);
130257dc 4261 backend->type = CHARDEV_BACKEND_KIND_MUX;
32bafa8f 4262 backend->u.mux.data->chardev = g_strdup(bid);
a61ae7f8
PM		 4263 ret = qmp_chardev_add(id, backend, errp);
4264 if (!ret) {
4265 chr = qemu_chr_find(bid);
4266 qemu_chr_delete(chr);
4267 chr = NULL;
4268 goto qapi_out;
4269 }
bd5c51ee 4270 }
7591c5c1 4271
a61ae7f8 4272 chr = qemu_chr_find(id);
a61ae7f8
PM		 4273
4274qapi_out:
4275 qapi_free_ChardevBackend(backend);
4276 qapi_free_ChardevReturn(ret);
4277 g_free(bid);
191bc01b 4278 return chr;
2274ae9d
GH		 4279
4280err:
2274ae9d 4281 return NULL;
191bc01b
GH		 4282}
4283
0ec7b3e7 4284Chardev *qemu_chr_new_noreplay(const char *label, const char *filename)
6f97dba0
AL		 4285{
4286 const char *p;
0ec7b3e7 4287 Chardev *chr;
191bc01b 4288 QemuOpts *opts;
bd2d80b2 4289 Error *err = NULL;
191bc01b 4290
c845f401
GH		 4291 if (strstart(filename, "chardev:", &p)) {
4292 return qemu_chr_find(p);
4293 }
4294
191bc01b 4295 opts = qemu_chr_parse_compat(label, filename);
7e1b35b4
GH		 4296 if (!opts)
4297 return NULL;
6f97dba0 4298
b4948be9 4299 chr = qemu_chr_new_from_opts(opts, &err);
84d18f06 4300 if (err) {
565f65d2 4301 error_report_err(err);
bd2d80b2 4302 }
7e1b35b4
GH		 4303 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
4304 monitor_init(chr, MONITOR_USE_READLINE);
6f97dba0 4305 }
0a73336d 4306 qemu_opts_del(opts);
6f97dba0
AL		 4307 return chr;
4308}
4309
0ec7b3e7 4310Chardev *qemu_chr_new(const char *label, const char *filename)
33577b47 4311{
0ec7b3e7 4312 Chardev *chr;
b4948be9 4313 chr = qemu_chr_new_noreplay(label, filename);
33577b47 4314 if (chr) {
5ebd6703
MAL		 4315 if (replay_mode != REPLAY_MODE_NONE) {
4316 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_REPLAY);
4317 }
777357d7 4318 if (qemu_chr_replay(chr) && CHARDEV_GET_CLASS(chr)->chr_ioctl) {
776a32a0
MAL		 4319 error_report("Replay: ioctl is not supported "
4320 "for serial devices yet");
33577b47
PD		 4321 }
4322 replay_register_char_driver(chr);
4323 }
4324 return chr;
4325}
4326
5345fdb4 4327void qemu_chr_fe_set_echo(CharBackend *be, bool echo)
c48855e1 4328{
0ec7b3e7 4329 Chardev *chr = be->chr;
5345fdb4 4330
777357d7
MAL		 4331 if (chr && CHARDEV_GET_CLASS(chr)->chr_set_echo) {
4332 CHARDEV_GET_CLASS(chr)->chr_set_echo(chr, echo);
c48855e1
PB		 4333 }
4334}
4335
5345fdb4 4336void qemu_chr_fe_set_open(CharBackend *be, int fe_open)
7c32c4fe 4337{
0ec7b3e7 4338 Chardev *chr = be->chr;
5345fdb4 4339
fa394ed6
MAL		 4340 if (!chr) {
4341 return;
4342 }
4343
830896af 4344 if (be->fe_open == fe_open) {
c0c4bd2c
HG		 4345 return;
4346 }
830896af 4347 be->fe_open = fe_open;
777357d7
MAL		 4348 if (CHARDEV_GET_CLASS(chr)->chr_set_fe_open) {
4349 CHARDEV_GET_CLASS(chr)->chr_set_fe_open(chr, fe_open);
7c32c4fe
HG		 4350 }
4351}
4352
5345fdb4 4353guint qemu_chr_fe_add_watch(CharBackend *be, GIOCondition cond,
6f1de6b7 4354 GIOFunc func, void *user_data)
23673ca7 4355{
0ec7b3e7 4356 Chardev *s = be->chr;
23673ca7
AL		 4357 GSource *src;
4358 guint tag;
4359
777357d7 4360 if (!s || CHARDEV_GET_CLASS(s)->chr_add_watch == NULL) {
6f1de6b7 4361 return 0;
23673ca7
AL		 4362 }
4363
777357d7 4364 src = CHARDEV_GET_CLASS(s)->chr_add_watch(s, cond);
62c339c5 4365 if (!src) {
6f1de6b7 4366 return 0;
62c339c5
PB		 4367 }
4368
23673ca7
AL		 4369 g_source_set_callback(src, (GSourceFunc)func, user_data, NULL);
4370 tag = g_source_attach(src, NULL);
4371 g_source_unref(src);
4372
4373 return tag;
4374}
4375
5345fdb4 4376void qemu_chr_fe_disconnect(CharBackend *be)
7d9d17f7 4377{
0ec7b3e7 4378 Chardev *chr = be->chr;
5345fdb4 4379
777357d7
MAL		 4380 if (chr && CHARDEV_GET_CLASS(chr)->chr_disconnect) {
4381 CHARDEV_GET_CLASS(chr)->chr_disconnect(chr);
7d9d17f7
TM		 4382 }
4383}
4384
0ec7b3e7 4385void qemu_chr_free(Chardev *chr)
d0d7708b 4386{
777357d7
MAL		 4387 if (CHARDEV_GET_CLASS(chr)->chr_free) {
4388 CHARDEV_GET_CLASS(chr)->chr_free(chr);
d0d7708b 4389 }
777357d7 4390 object_unref(OBJECT(chr));
d0d7708b
DB		 4391}
4392
0ec7b3e7 4393void qemu_chr_delete(Chardev *chr)
1ad78ea5
MAL		 4394{
4395 QTAILQ_REMOVE(&chardevs, chr, next);
4396 qemu_chr_free(chr);
4397}
4398
c5a415a0 4399ChardevInfoList *qmp_query_chardev(Error **errp)
6f97dba0 4400{
c5a415a0 4401 ChardevInfoList *chr_list = NULL;
0ec7b3e7 4402 Chardev *chr;
6f97dba0 4403
72cf2d4f 4404 QTAILQ_FOREACH(chr, &chardevs, next) {
c5a415a0
LC		 4405 ChardevInfoList *info = g_malloc0(sizeof(*info));
4406 info->value = g_malloc0(sizeof(*info->value));
4407 info->value->label = g_strdup(chr->label);
4408 info->value->filename = g_strdup(chr->filename);
830896af 4409 info->value->frontend_open = chr->be && chr->be->fe_open;
c5a415a0
LC		 4410
4411 info->next = chr_list;
4412 chr_list = info;
6f97dba0 4413 }
588b3832 4414
c5a415a0 4415 return chr_list;
6f97dba0 4416}
c845f401 4417
0b812f31
MAL		 4418static ChardevBackendInfoList *
4419qmp_prepend_backend(ChardevBackendInfoList *list, const char *name)
4420{
4421 ChardevBackendInfoList *info = g_malloc0(sizeof(*info));
4422 info->value = g_malloc0(sizeof(*info->value));
4423 info->value->name = g_strdup(name);
4424 info->next = list;
4425 return info;
4426}
4427
77d1c3c6
MK		 4428ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp)
4429{
4430 ChardevBackendInfoList *backend_list = NULL;
a1698bf1
MAL		 4431 const CharDriver *c;
4432 int i;
4433
4434 for (i = 0; i < ARRAY_SIZE(backends); i++) {
4435 c = backends[i];
4436 if (!c) {
4437 continue;
4438 }
77d1c3c6 4439
0b812f31
MAL		 4440 backend_list = qmp_prepend_backend(backend_list,
4441 ChardevBackendKind_lookup[c->kind]);
4442 if (c->alias) {
4443 backend_list = qmp_prepend_backend(backend_list, c->alias);
4444 }
77d1c3c6
MK		 4445 }
4446
4447 return backend_list;
4448}
4449
0ec7b3e7 4450Chardev *qemu_chr_find(const char *name)
c845f401 4451{
0ec7b3e7 4452 Chardev *chr;
c845f401 4453
72cf2d4f 4454 QTAILQ_FOREACH(chr, &chardevs, next) {
c845f401
GH		 4455 if (strcmp(chr->label, name) != 0)
4456 continue;
4457 return chr;
4458 }
4459 return NULL;
4460}
0beb4942 4461
4d454574
PB		 4462QemuOptsList qemu_chardev_opts = {
4463 .name = "chardev",
4464 .implied_opt_name = "backend",
4465 .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
4466 .desc = {
4467 {
4468 .name = "backend",
4469 .type = QEMU_OPT_STRING,
4470 },{
4471 .name = "path",
4472 .type = QEMU_OPT_STRING,
4473 },{
4474 .name = "host",
4475 .type = QEMU_OPT_STRING,
4476 },{
4477 .name = "port",
4478 .type = QEMU_OPT_STRING,
4479 },{
4480 .name = "localaddr",
4481 .type = QEMU_OPT_STRING,
4482 },{
4483 .name = "localport",
4484 .type = QEMU_OPT_STRING,
4485 },{
4486 .name = "to",
4487 .type = QEMU_OPT_NUMBER,
4488 },{
4489 .name = "ipv4",
4490 .type = QEMU_OPT_BOOL,
4491 },{
4492 .name = "ipv6",
4493 .type = QEMU_OPT_BOOL,
4494 },{
4495 .name = "wait",
4496 .type = QEMU_OPT_BOOL,
4497 },{
4498 .name = "server",
4499 .type = QEMU_OPT_BOOL,
4500 },{
4501 .name = "delay",
4502 .type = QEMU_OPT_BOOL,
5dd1f02b
CM		 4503 },{
4504 .name = "reconnect",
4505 .type = QEMU_OPT_NUMBER,
4d454574
PB		 4506 },{
4507 .name = "telnet",
4508 .type = QEMU_OPT_BOOL,
a8fb5427
DB		 4509 },{
4510 .name = "tls-creds",
4511 .type = QEMU_OPT_STRING,
4d454574
PB		 4512 },{
4513 .name = "width",
4514 .type = QEMU_OPT_NUMBER,
4515 },{
4516 .name = "height",
4517 .type = QEMU_OPT_NUMBER,
4518 },{
4519 .name = "cols",
4520 .type = QEMU_OPT_NUMBER,
4521 },{
4522 .name = "rows",
4523 .type = QEMU_OPT_NUMBER,
4524 },{
4525 .name = "mux",
4526 .type = QEMU_OPT_BOOL,
4527 },{
4528 .name = "signal",
4529 .type = QEMU_OPT_BOOL,
4530 },{
4531 .name = "name",
4532 .type = QEMU_OPT_STRING,
4533 },{
4534 .name = "debug",
4535 .type = QEMU_OPT_NUMBER,
51767e7c 4536 },{
3949e594 4537 .name = "size",
de1cc36e 4538 .type = QEMU_OPT_SIZE,
bb6fb7c0
GH		 4539 },{
4540 .name = "chardev",
4541 .type = QEMU_OPT_STRING,
31e38a22
OK		 4542 },{
4543 .name = "append",
4544 .type = QEMU_OPT_BOOL,
d0d7708b
DB		 4545 },{
4546 .name = "logfile",
4547 .type = QEMU_OPT_STRING,
4548 },{
4549 .name = "logappend",
4550 .type = QEMU_OPT_BOOL,
4d454574
PB		 4551 },
4552 { /* end of list */ }
4553 },
4554};
f1a1a356 4555
ffbdbe59
GH		 4556#ifdef _WIN32
4557
777357d7
MAL		 4558static void qmp_chardev_open_file(Chardev *chr,
4559 ChardevBackend *backend,
4560 bool *be_opened,
4561 Error **errp)
ffbdbe59 4562{
32bafa8f 4563 ChardevFile *file = backend->u.file.data;
ffbdbe59 4564 HANDLE out;
c025f689
SW		 4565 DWORD accessmode;
4566 DWORD flags;
ffbdbe59 4567
e859eda5 4568 if (file->has_in) {
ffbdbe59 4569 error_setg(errp, "input file not supported");
777357d7 4570 return;
ffbdbe59
GH		 4571 }
4572
c025f689
SW		 4573 if (file->has_append && file->append) {
4574 /* Append to file if it already exists. */
4575 accessmode = FILE_GENERIC_WRITE & ~FILE_WRITE_DATA;
4576 flags = OPEN_ALWAYS;
4577 } else {
4578 /* Truncate file if it already exists. */
4579 accessmode = GENERIC_WRITE;
4580 flags = CREATE_ALWAYS;
4581 }
4582
4583 out = CreateFile(file->out, accessmode, FILE_SHARE_READ, NULL, flags,
4584 FILE_ATTRIBUTE_NORMAL, NULL);
ffbdbe59
GH		 4585 if (out == INVALID_HANDLE_VALUE) {
4586 error_setg(errp, "open %s failed", file->out);
777357d7 4587 return;
ffbdbe59 4588 }
777357d7
MAL		 4589
4590 qemu_chr_open_win_file(chr, out);
ffbdbe59
GH		 4591}
4592
777357d7
MAL		 4593static void qmp_chardev_open_serial(Chardev *chr,
4594 ChardevBackend *backend,
4595 bool *be_opened,
4596 Error **errp)
d59044ef 4597{
32bafa8f 4598 ChardevHostdev *serial = backend->u.serial.data;
acbfbe4a 4599
777357d7 4600 win_chr_init(chr, serial->device, errp);
d36b2b90
MA		 4601}
4602
ffbdbe59
GH		 4603#else /* WIN32 */
4604
4605static int qmp_chardev_open_file_source(char *src, int flags,
4606 Error **errp)
4607{
4608 int fd = -1;
4609
4610 TFR(fd = qemu_open(src, flags, 0666));
4611 if (fd == -1) {
20c39760 4612 error_setg_file_open(errp, errno, src);
ffbdbe59
GH		 4613 }
4614 return fd;
4615}
4616
777357d7
MAL		 4617static void qmp_chardev_open_file(Chardev *chr,
4618 ChardevBackend *backend,
4619 bool *be_opened,
4620 Error **errp)
ffbdbe59 4621{
32bafa8f 4622 ChardevFile *file = backend->u.file.data;
5f758366 4623 int flags, in = -1, out;
ffbdbe59 4624
31e38a22
OK		 4625 flags = O_WRONLY | O_CREAT | O_BINARY;
4626 if (file->has_append && file->append) {
4627 flags |= O_APPEND;
4628 } else {
4629 flags |= O_TRUNC;
4630 }
4631
ffbdbe59 4632 out = qmp_chardev_open_file_source(file->out, flags, errp);
5f758366 4633 if (out < 0) {
777357d7 4634 return;
ffbdbe59
GH		 4635 }
4636
e859eda5 4637 if (file->has_in) {
ffbdbe59
GH		 4638 flags = O_RDONLY;
4639 in = qmp_chardev_open_file_source(file->in, flags, errp);
5f758366 4640 if (in < 0) {
ffbdbe59 4641 qemu_close(out);
777357d7 4642 return;
ffbdbe59
GH		 4643 }
4644 }
4645
777357d7 4646 qemu_chr_open_fd(chr, in, out);
ffbdbe59
GH		 4647}
4648
d809ab95 4649#ifdef HAVE_CHARDEV_SERIAL
777357d7
MAL		 4650static void qmp_chardev_open_serial(Chardev *chr,
4651 ChardevBackend *backend,
4652 bool *be_opened,
4653 Error **errp)
d59044ef 4654{
32bafa8f 4655 ChardevHostdev *serial = backend->u.serial.data;
d36b2b90
MA		 4656 int fd;
4657
4658 fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
5f758366 4659 if (fd < 0) {
777357d7 4660 return;
39099991 4661 }
f9e8cacc 4662 qemu_set_nonblock(fd);
acbfbe4a 4663 tty_serial_init(fd, 115200, 'N', 8, 1);
b68e956a 4664
777357d7 4665 qemu_chr_open_fd(chr, fd, fd);
d36b2b90 4666}
6511d396 4667#endif
d36b2b90 4668
d809ab95 4669#ifdef HAVE_CHARDEV_PARPORT
777357d7
MAL		 4670static void qmp_chardev_open_parallel(Chardev *chr,
4671 ChardevBackend *backend,
4672 bool *be_opened,
4673 Error **errp)
d36b2b90 4674{
32bafa8f 4675 ChardevHostdev *parallel = backend->u.parallel.data;
d36b2b90
MA		 4676 int fd;
4677
4678 fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp);
5f758366 4679 if (fd < 0) {
777357d7 4680 return;
d59044ef 4681 }
777357d7 4682 qemu_chr_open_pp_fd(chr, fd, be_opened, errp);
d59044ef 4683}
b68e956a
MAL		 4684
4685static const CharDriver parallel_driver = {
4686 .kind = CHARDEV_BACKEND_KIND_PARALLEL,
4687 .alias = "parport",
4688 .parse = qemu_chr_parse_parallel,
777357d7
MAL		 4689};
4690
4691static void char_parallel_class_init(ObjectClass *oc, void *data)
4692{
4693 ChardevClass *cc = CHARDEV_CLASS(oc);
4694
4695 cc->open = qmp_chardev_open_parallel;
b68e956a 4696#if defined(__linux__)
777357d7
MAL		 4697 cc->chr_write = null_chr_write;
4698 cc->chr_ioctl = pp_ioctl;
4699 cc->chr_free = pp_free;
b68e956a 4700#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
b68e956a 4701 /* FIXME: no chr_free */
777357d7
MAL		 4702 cc->chr_write = null_chr_write;
4703 cc->chr_ioctl = pp_ioctl;
b68e956a 4704#endif
777357d7
MAL		 4705}
4706
4707static const TypeInfo char_parallel_type_info = {
4708 .name = TYPE_CHARDEV_PARALLEL,
4709 .parent = TYPE_CHARDEV,
4710 .instance_size = sizeof(ParallelChardev),
4711 .class_init = char_parallel_class_init,
b68e956a 4712};
d809ab95 4713#endif
d59044ef 4714
ffbdbe59
GH		 4715#endif /* WIN32 */
4716
b68e956a
MAL		 4717static const CharDriver file_driver = {
4718 .kind = CHARDEV_BACKEND_KIND_FILE,
4719 .parse = qemu_chr_parse_file_out,
777357d7
MAL		 4720};
4721
4722static void char_file_class_init(ObjectClass *oc, void *data)
4723{
4724 ChardevClass *cc = CHARDEV_CLASS(oc);
4725
4726 cc->open = qmp_chardev_open_file;
b68e956a 4727#ifdef _WIN32
b68e956a 4728 /* FIXME: no chr_free */
777357d7
MAL		 4729 cc->chr_free = NULL;
4730#endif
4731}
4732
4733static const TypeInfo char_file_type_info = {
4734 .name = TYPE_CHARDEV_FILE,
4735#ifdef _WIN32
4736 .parent = TYPE_CHARDEV_WIN,
b68e956a 4737#else
777357d7 4738 .parent = TYPE_CHARDEV_FD,
b68e956a 4739#endif
777357d7 4740 .class_init = char_file_class_init,
b68e956a
MAL		 4741};
4742
4743#ifdef HAVE_CHARDEV_SERIAL
777357d7 4744
b68e956a
MAL		 4745static const CharDriver serial_driver = {
4746 .kind = CHARDEV_BACKEND_KIND_SERIAL,
4747 .alias = "tty",
4748 .parse = qemu_chr_parse_serial,
777357d7
MAL		 4749};
4750
4751static void char_serial_class_init(ObjectClass *oc, void *data)
4752{
4753 ChardevClass *cc = CHARDEV_CLASS(oc);
4754
4755 cc->open = qmp_chardev_open_serial;
4756#ifndef _WIN32
4757 cc->chr_ioctl = tty_serial_ioctl;
4758 cc->chr_free = qemu_chr_free_tty;
4759#endif
4760}
4761
4762static const TypeInfo char_serial_type_info = {
4763 .name = TYPE_CHARDEV_SERIAL,
b68e956a 4764#ifdef _WIN32
777357d7 4765 .parent = TYPE_CHARDEV_WIN,
b68e956a 4766#else
777357d7 4767 .parent = TYPE_CHARDEV_FD,
b68e956a 4768#endif
777357d7 4769 .class_init = char_serial_class_init,
b68e956a
MAL		 4770};
4771#endif
4772
5dd1f02b
CM		 4773static gboolean socket_reconnect_timeout(gpointer opaque)
4774{
777357d7
MAL		 4775 Chardev *chr = CHARDEV(opaque);
4776 SocketChardev *s = SOCKET_CHARDEV(opaque);
317856ca 4777 QIOChannelSocket *sioc;
5dd1f02b
CM		 4778
4779 s->reconnect_timer = 0;
4780
4781 if (chr->be_open) {
4782 return false;
4783 }
4784
317856ca 4785 sioc = qio_channel_socket_new();
e93a68e1 4786 tcp_chr_set_client_ioc_name(chr, sioc);
317856ca
DB		 4787 qio_channel_socket_connect_async(sioc, s->addr,
4788 qemu_chr_socket_connected,
4789 chr, NULL);
5dd1f02b
CM		 4790
4791 return false;
4792}
4793
777357d7
MAL		 4794static void qmp_chardev_open_socket(Chardev *chr,
4795 ChardevBackend *backend,
4796 bool *be_opened,
4797 Error **errp)
f6bd5d6e 4798{
777357d7 4799 SocketChardev *s = SOCKET_CHARDEV(chr);
32bafa8f 4800 ChardevSocket *sock = backend->u.socket.data;
f6bd5d6e
GH		 4801 SocketAddress *addr = sock->addr;
4802 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
4803 bool is_listen = sock->has_server ? sock->server : true;
4804 bool is_telnet = sock->has_telnet ? sock->telnet : false;
4805 bool is_waitconnect = sock->has_wait ? sock->wait : false;
5dd1f02b 4806 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0;
317856ca 4807 QIOChannelSocket *sioc = NULL;
43ded1a0 4808
130257dc 4809 s->is_unix = addr->type == SOCKET_ADDRESS_KIND_UNIX;
cfb429cb
CM		 4810 s->is_listen = is_listen;
4811 s->is_telnet = is_telnet;
43ded1a0 4812 s->do_nodelay = do_nodelay;
a8fb5427
DB		 4813 if (sock->tls_creds) {
4814 Object *creds;
4815 creds = object_resolve_path_component(
4816 object_get_objects_root(), sock->tls_creds);
4817 if (!creds) {
4818 error_setg(errp, "No TLS credentials with id '%s'",
4819 sock->tls_creds);
4820 goto error;
4821 }
4822 s->tls_creds = (QCryptoTLSCreds *)
4823 object_dynamic_cast(creds,
4824 TYPE_QCRYPTO_TLS_CREDS);
4825 if (!s->tls_creds) {
4826 error_setg(errp, "Object with id '%s' is not TLS credentials",
4827 sock->tls_creds);
4828 goto error;
4829 }
4830 object_ref(OBJECT(s->tls_creds));
4831 if (is_listen) {
4832 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
4833 error_setg(errp, "%s",
4834 "Expected TLS credentials for server endpoint");
4835 goto error;
4836 }
4837 } else {
4838 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) {
4839 error_setg(errp, "%s",
4840 "Expected TLS credentials for client endpoint");
4841 goto error;
4842 }
4843 }
4844 }
4845
37f9e0a2 4846 s->addr = QAPI_CLONE(SocketAddress, sock->addr);
43ded1a0 4847
0a73336d
DB		 4848 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE);
4849 if (s->is_unix) {
4850 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS);
4851 }
4852
43ded1a0 4853 /* be isn't opened until we get a connection */
82878dac 4854 *be_opened = false;
43ded1a0 4855
0ff0fad2
DB		 4856 chr->filename = SocketAddress_to_str("disconnected:",
4857 addr, is_listen, is_telnet);
f6bd5d6e
GH		 4858
4859 if (is_listen) {
43ded1a0
CM		 4860 if (is_telnet) {
4861 s->do_telnetopt = 1;
4862 }
5dd1f02b
CM		 4863 } else if (reconnect > 0) {
4864 s->reconnect_time = reconnect;
f6bd5d6e 4865 }
43ded1a0 4866
5008e5b7 4867 if (s->reconnect_time) {
d7a04fd7 4868 sioc = qio_channel_socket_new();
e93a68e1 4869 tcp_chr_set_client_ioc_name(chr, sioc);
317856ca
DB		 4870 qio_channel_socket_connect_async(sioc, s->addr,
4871 qemu_chr_socket_connected,
4872 chr, NULL);
08b758b4 4873 } else {
d7a04fd7 4874 if (s->is_listen) {
e93a68e1 4875 char *name;
d7a04fd7 4876 sioc = qio_channel_socket_new();
e93a68e1
DB		 4877
4878 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label);
4879 qio_channel_set_name(QIO_CHANNEL(sioc), name);
4880 g_free(name);
4881
d7a04fd7
MAL		 4882 if (qio_channel_socket_listen_sync(sioc, s->addr, errp) < 0) {
4883 goto error;
4884 }
4885 s->listen_ioc = sioc;
4886 if (is_waitconnect &&
4887 qemu_chr_wait_connected(chr, errp) < 0) {
4888 goto error;
4889 }
4890 if (!s->ioc) {
4891 s->listen_tag = qio_channel_add_watch(
4892 QIO_CHANNEL(s->listen_ioc), G_IO_IN,
4893 tcp_chr_accept, chr, NULL);
4894 }
4895 } else if (qemu_chr_wait_connected(chr, errp) < 0) {
08b758b4
DB		 4896 goto error;
4897 }
43ded1a0
CM		 4898 }
4899
777357d7 4900 return;
a8fb5427 4901
777357d7 4902error:
08b758b4
DB		 4903 if (sioc) {
4904 object_unref(OBJECT(sioc));
4905 }
a8fb5427
DB		 4906 if (s->tls_creds) {
4907 object_unref(OBJECT(s->tls_creds));
4908 }
f6bd5d6e
GH		 4909}
4910
b68e956a
MAL		 4911static const CharDriver socket_driver = {
4912 .kind = CHARDEV_BACKEND_KIND_SOCKET,
4913 .parse = qemu_chr_parse_socket,
b68e956a
MAL		 4914};
4915
777357d7
MAL		 4916static void char_socket_class_init(ObjectClass *oc, void *data)
4917{
4918 ChardevClass *cc = CHARDEV_CLASS(oc);
4919
4920 cc->open = qmp_chardev_open_socket;
4921 cc->chr_wait_connected = tcp_chr_wait_connected;
4922 cc->chr_write = tcp_chr_write;
4923 cc->chr_sync_read = tcp_chr_sync_read;
4924 cc->chr_disconnect = tcp_chr_disconnect;
4925 cc->get_msgfds = tcp_get_msgfds;
4926 cc->set_msgfds = tcp_set_msgfds;
4927 cc->chr_add_client = tcp_chr_add_client;
4928 cc->chr_add_watch = tcp_chr_add_watch;
4929 cc->chr_update_read_handler = tcp_chr_update_read_handler;
4930 cc->chr_free = tcp_chr_free;
4931}
4932
4933static const TypeInfo char_socket_type_info = {
4934 .name = TYPE_CHARDEV_SOCKET,
4935 .parent = TYPE_CHARDEV,
4936 .instance_size = sizeof(SocketChardev),
4937 .class_init = char_socket_class_init,
4938};
4939
4940static void qmp_chardev_open_udp(Chardev *chr,
4941 ChardevBackend *backend,
4942 bool *be_opened,
4943 Error **errp)
3ecc059d 4944{
32bafa8f 4945 ChardevUdp *udp = backend->u.udp.data;
9894dc0c 4946 QIOChannelSocket *sioc = qio_channel_socket_new();
e93a68e1 4947 char *name;
777357d7 4948 UdpChardev *s = UDP_CHARDEV(chr);
3ecc059d 4949
9894dc0c 4950 if (qio_channel_socket_dgram_sync(sioc,
150dcd1a 4951 udp->local, udp->remote,
9894dc0c
DB		 4952 errp) < 0) {
4953 object_unref(OBJECT(sioc));
777357d7 4954 return;
acbfbe4a 4955 }
e93a68e1
DB		 4956
4957 name = g_strdup_printf("chardev-udp-%s", chr->label);
4958 qio_channel_set_name(QIO_CHANNEL(sioc), name);
4959 g_free(name);
4960
acbfbe4a 4961 s->ioc = QIO_CHANNEL(sioc);
acbfbe4a
MAL		 4962 /* be isn't opened until we get a connection */
4963 *be_opened = false;
3ecc059d
GH		 4964}
4965
b68e956a
MAL		 4966static const CharDriver udp_driver = {
4967 .kind = CHARDEV_BACKEND_KIND_UDP,
4968 .parse = qemu_chr_parse_udp,
777357d7
MAL		 4969};
4970
4971static void char_udp_class_init(ObjectClass *oc, void *data)
4972{
4973 ChardevClass *cc = CHARDEV_CLASS(oc);
4974
4975 cc->open = qmp_chardev_open_udp;
4976 cc->chr_write = udp_chr_write;
4977 cc->chr_update_read_handler = udp_chr_update_read_handler;
4978 cc->chr_free = udp_chr_free;
4979}
4980
4981static const TypeInfo char_udp_type_info = {
4982 .name = TYPE_CHARDEV_UDP,
4983 .parent = TYPE_CHARDEV,
4984 .instance_size = sizeof(UdpChardev),
4985 .class_init = char_udp_class_init,
b68e956a 4986};
0a73336d 4987
0ec7b3e7 4988bool qemu_chr_has_feature(Chardev *chr,
0a73336d
DB		 4989 CharDriverFeature feature)
4990{
4991 return test_bit(feature, chr->features);
4992}
4993
0ec7b3e7 4994void qemu_chr_set_feature(Chardev *chr,
0a73336d
DB		 4995 CharDriverFeature feature)
4996{
4997 return set_bit(feature, chr->features);
4998}
4999
777357d7
MAL		 5000static const ChardevClass *char_get_class(const char *driver, Error **errp)
5001{
5002 ObjectClass *oc;
5003 const ChardevClass *cc;
5004 char *typename = g_strdup_printf("chardev-%s", driver);
5005
5006 oc = object_class_by_name(typename);
5007 g_free(typename);
5008
5009 if (!object_class_dynamic_cast(oc, TYPE_CHARDEV)) {
5010 error_setg(errp, "'%s' is not a valid char driver name", driver);
5011 return NULL;
5012 }
5013
5014 if (object_class_is_abstract(oc)) {
5015 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
5016 "abstract device type");
5017 return NULL;
5018 }
5019
5020 cc = CHARDEV_CLASS(oc);
5021 if (cc->internal) {
5022 error_setg(errp, "'%s' is not a valid char driver name", driver);
5023 return NULL;
5024 }
5025
5026 return cc;
5027}
5028
5029Chardev *qemu_chardev_new(const char *id, const char *typename,
5030 ChardevBackend *backend, Error **errp)
f1a1a356 5031{
0ec7b3e7 5032 Chardev *chr = NULL;
eaeba653 5033 Error *local_err = NULL;
82878dac 5034 bool be_opened = true;
f1a1a356 5035
777357d7 5036 assert(g_str_has_prefix(typename, "chardev-"));
f1a1a356 5037
777357d7
MAL		 5038 chr = CHARDEV(object_new(typename));
5039 chr->label = g_strdup(id);
4ca17281 5040
777357d7 5041 qemu_char_open(chr, backend, &be_opened, &local_err);
a1698bf1
MAL		 5042 if (local_err) {
5043 error_propagate(errp, local_err);
777357d7
MAL		 5044 object_unref(OBJECT(chr));
5045 return NULL;
eaeba653
PB		 5046 }
5047
eaeba653 5048 if (!chr->filename) {
777357d7 5049 chr->filename = g_strdup(typename + 8);
f1a1a356 5050 }
82878dac 5051 if (be_opened) {
eaeba653
PB		 5052 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
5053 }
777357d7
MAL		 5054
5055 return chr;
5056}
5057
5058ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
5059 Error **errp)
5060{
5061 const ChardevClass *cc;
5062 ChardevReturn *ret;
5063 Chardev *chr;
5064
5065 chr = qemu_chr_find(id);
5066 if (chr) {
5067 error_setg(errp, "Chardev '%s' already exists", id);
5068 return NULL;
5069 }
5070
5071 cc = char_get_class(ChardevBackendKind_lookup[backend->type], errp);
5072 if (!cc) {
5073 return NULL;
5074 }
5075
5076 chr = qemu_chardev_new(id, object_class_get_name(OBJECT_CLASS(cc)),
5077 backend, errp);
5078 if (!chr) {
5079 return NULL;
5080 }
5081
5082 ret = g_new0(ChardevReturn, 1);
5083 if (CHARDEV_IS_PTY(chr)) {
5084 ret->pty = g_strdup(chr->filename + 4);
5085 ret->has_pty = true;
5086 }
5087
eaeba653
PB		 5088 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
5089 return ret;
f1a1a356
GH		 5090}
5091
5092void qmp_chardev_remove(const char *id, Error **errp)
5093{
0ec7b3e7 5094 Chardev *chr;
f1a1a356
GH		 5095
5096 chr = qemu_chr_find(id);
8108fd3e 5097 if (chr == NULL) {
f1a1a356
GH		 5098 error_setg(errp, "Chardev '%s' not found", id);
5099 return;
5100 }
a4afa548 5101 if (qemu_chr_is_busy(chr)) {
f1a1a356
GH		 5102 error_setg(errp, "Chardev '%s' is busy", id);
5103 return;
5104 }
5ebd6703 5105 if (qemu_chr_replay(chr)) {
33577b47
PD		 5106 error_setg(errp,
5107 "Chardev '%s' cannot be unplugged in record/replay mode", id);
5108 return;
5109 }
f1a1a356
GH		 5110 qemu_chr_delete(chr);
5111}
d654f34e 5112
aa5cb7f5 5113void qemu_chr_cleanup(void)
c1111a24 5114{
0ec7b3e7 5115 Chardev *chr, *tmp;
c1111a24
MAL		 5116
5117 QTAILQ_FOREACH_SAFE(chr, &chardevs, next, tmp) {
5118 qemu_chr_delete(chr);
5119 }
5120}
5121
d654f34e
AL		 5122static void register_types(void)
5123{
777357d7
MAL		 5124 static const struct {
5125 const CharDriver *driver;
5126 const TypeInfo *type;
5127 } chardevs[] = {
5128 { &null_driver, &char_null_type_info },
5129 { &socket_driver, &char_socket_type_info },
5130 { &udp_driver, &char_udp_type_info },
5131 { &ringbuf_driver, &char_ringbuf_type_info },
5132 { &file_driver, &char_file_type_info },
5133 { &stdio_driver, &char_stdio_type_info },
b68e956a 5134#ifdef HAVE_CHARDEV_SERIAL
777357d7 5135 { &serial_driver, &char_serial_type_info },
6511d396 5136#endif
38bfb1a6 5137#ifdef HAVE_CHARDEV_PARPORT
777357d7 5138 { &parallel_driver, &char_parallel_type_info },
38bfb1a6 5139#endif
c2e75a43 5140#ifdef HAVE_CHARDEV_PTY
777357d7 5141 { &pty_driver, &char_pty_type_info },
c2e75a43 5142#endif
122e5ed4 5143#ifdef _WIN32
777357d7 5144 { &console_driver, &char_console_type_info },
122e5ed4 5145#endif
777357d7
MAL		 5146 { &pipe_driver, &char_pipe_type_info },
5147 { &mux_driver, &char_mux_type_info },
5148 { &memory_driver, &char_memory_type_info }
0b812f31 5149 };
b68e956a 5150 int i;
0b812f31 5151
777357d7
MAL		 5152 type_register_static(&char_type_info);
5153#ifndef _WIN32
5154 type_register_static(&char_fd_type_info);
5155#else
5156 type_register_static(&char_win_type_info);
5157 type_register_static(&char_win_stdio_type_info);
5158#endif
5159 for (i = 0; i < ARRAY_SIZE(chardevs); i++) {
5160 type_register_static(chardevs[i].type);
5161 register_char_driver(chardevs[i].driver);
0b812f31
MAL		 5162 }
5163
7b7ab18d
MR		 5164 /* this must be done after machine init, since we register FEs with muxes
5165 * as part of realize functions like serial_isa_realizefn when -nographic
5166 * is specified
5167 */
5168 qemu_add_machine_init_done_notifier(&muxes_realize_notify);
d654f34e
AL		 5169}
5170
5171type_init(register_types);
Mirror of https://git.qemu.org/git/qemu.git