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target/ppc: Remove static inline
[qemu.git] / chardev / char-socket.c
blobd619088232d30ccb1e60c8e650b45942968175b4
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 #include "qemu/osdep.h"
26 #include "chardev/char.h"
27 #include "io/channel-socket.h"
28 #include "io/channel-websock.h"
29 #include "qemu/error-report.h"
30 #include "qemu/module.h"
31 #include "qemu/option.h"
32 #include "qapi/error.h"
33 #include "qapi/clone-visitor.h"
34 #include "qapi/qapi-visit-sockets.h"
35 #include "qemu/yank.h"
36
37 #include "chardev/char-io.h"
38 #include "chardev/char-socket.h"
39
40 static gboolean socket_reconnect_timeout(gpointer opaque);
41 static void tcp_chr_telnet_init(Chardev *chr);
42
43 static void tcp_chr_change_state(SocketChardev *s, TCPChardevState state)
44 {
45 switch (state) {
46 case TCP_CHARDEV_STATE_DISCONNECTED:
47 break;
48 case TCP_CHARDEV_STATE_CONNECTING:
49 assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED);
50 break;
51 case TCP_CHARDEV_STATE_CONNECTED:
52 assert(s->state == TCP_CHARDEV_STATE_CONNECTING);
53 break;
54 }
55 s->state = state;
56 }
57
58 static void tcp_chr_reconn_timer_cancel(SocketChardev *s)
59 {
60 if (s->reconnect_timer) {
61 g_source_destroy(s->reconnect_timer);
62 g_source_unref(s->reconnect_timer);
63 s->reconnect_timer = NULL;
64 }
65 }
66
67 static void qemu_chr_socket_restart_timer(Chardev *chr)
68 {
69 SocketChardev *s = SOCKET_CHARDEV(chr);
70 char *name;
71
72 assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED);
73 assert(!s->reconnect_timer);
74 name = g_strdup_printf("chardev-socket-reconnect-%s", chr->label);
75 s->reconnect_timer = qemu_chr_timeout_add_ms(chr,
76 s->reconnect_time * 1000,
77 socket_reconnect_timeout,
78 chr);
79 g_source_set_name(s->reconnect_timer, name);
80 g_free(name);
81 }
82
83 static void check_report_connect_error(Chardev *chr,
84 Error *err)
85 {
86 SocketChardev *s = SOCKET_CHARDEV(chr);
87
88 if (!s->connect_err_reported) {
89 error_reportf_err(err,
90 "Unable to connect character device %s: ",
91 chr->label);
92 s->connect_err_reported = true;
93 } else {
94 error_free(err);
95 }
96 qemu_chr_socket_restart_timer(chr);
97 }
98
99 static void tcp_chr_accept(QIONetListener *listener,
100 QIOChannelSocket *cioc,
101 void *opaque);
102
103 static int tcp_chr_read_poll(void *opaque);
104 static void tcp_chr_disconnect_locked(Chardev *chr);
105
106 /* Called with chr_write_lock held. */
107 static int tcp_chr_write(Chardev *chr, const uint8_t *buf, int len)
108 {
109 SocketChardev *s = SOCKET_CHARDEV(chr);
110
111 if (s->state == TCP_CHARDEV_STATE_CONNECTED) {
112 int ret = io_channel_send_full(s->ioc, buf, len,
113 s->write_msgfds,
114 s->write_msgfds_num);
115
116 /* free the written msgfds in any cases
117 * other than ret < 0 && errno == EAGAIN
118 */
119 if (!(ret < 0 && EAGAIN == errno)
120 && s->write_msgfds_num) {
121 g_free(s->write_msgfds);
122 s->write_msgfds = 0;
123 s->write_msgfds_num = 0;
124 }
125
126 if (ret < 0 && errno != EAGAIN) {
127 if (tcp_chr_read_poll(chr) <= 0) {
128 /* Perform disconnect and return error. */
129 tcp_chr_disconnect_locked(chr);
130 } /* else let the read handler finish it properly */
131 }
132
133 return ret;
134 } else {
135 /* Indicate an error. */
136 errno = EIO;
137 return -1;
138 }
139 }
140
141 static int tcp_chr_read_poll(void *opaque)
142 {
143 Chardev *chr = CHARDEV(opaque);
144 SocketChardev *s = SOCKET_CHARDEV(opaque);
145 if (s->state != TCP_CHARDEV_STATE_CONNECTED) {
146 return 0;
147 }
148 s->max_size = qemu_chr_be_can_write(chr);
149 return s->max_size;
150 }
151
152 static void tcp_chr_process_IAC_bytes(Chardev *chr,
153 SocketChardev *s,
154 uint8_t *buf, int *size)
155 {
156 /* Handle any telnet or tn3270 client's basic IAC options.
157 * For telnet options, it satisfies char by char mode with no echo.
158 * For tn3270 options, it satisfies binary mode with EOR.
159 * All IAC options will be removed from the buf and the do_opt
160 * pointer will be used to track the state of the width of the
161 * IAC information.
162 *
163 * RFC854: "All TELNET commands consist of at least a two byte sequence.
164 * The commands dealing with option negotiation are three byte sequences,
165 * the third byte being the code for the option referenced."
166 * "IAC BREAK", "IAC IP", "IAC NOP" and the double IAC are two bytes.
167 * "IAC SB", "IAC SE" and "IAC EOR" are saved to split up data boundary
168 * for tn3270.
169 * NOP, Break and Interrupt Process(IP) might be encountered during a TN3270
170 * session, and NOP and IP need to be done later.
171 */
172
173 int i;
174 int j = 0;
175
176 for (i = 0; i < *size; i++) {
177 if (s->do_telnetopt > 1) {
178 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
179 /* Double IAC means send an IAC */
180 if (j != i) {
181 buf[j] = buf[i];
182 }
183 j++;
184 s->do_telnetopt = 1;
185 } else {
186 if ((unsigned char)buf[i] == IAC_BREAK
187 && s->do_telnetopt == 2) {
188 /* Handle IAC break commands by sending a serial break */
189 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
190 s->do_telnetopt++;
191 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_EOR
192 || (unsigned char)buf[i] == IAC_SB
193 || (unsigned char)buf[i] == IAC_SE)
194 && s->do_telnetopt == 2) {
195 buf[j++] = IAC;
196 buf[j++] = buf[i];
197 s->do_telnetopt++;
198 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_IP
199 || (unsigned char)buf[i] == IAC_NOP)
200 && s->do_telnetopt == 2) {
201 /* TODO: IP and NOP need to be implemented later. */
202 s->do_telnetopt++;
203 }
204 s->do_telnetopt++;
205 }
206 if (s->do_telnetopt >= 4) {
207 s->do_telnetopt = 1;
208 }
209 } else {
210 if ((unsigned char)buf[i] == IAC) {
211 s->do_telnetopt = 2;
212 } else {
213 if (j != i) {
214 buf[j] = buf[i];
215 }
216 j++;
217 }
218 }
219 }
220 *size = j;
221 }
222
223 static int tcp_get_msgfds(Chardev *chr, int *fds, int num)
224 {
225 SocketChardev *s = SOCKET_CHARDEV(chr);
226
227 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
228
229 assert(num <= TCP_MAX_FDS);
230
231 if (to_copy) {
232 int i;
233
234 memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
235
236 /* Close unused fds */
237 for (i = to_copy; i < s->read_msgfds_num; i++) {
238 close(s->read_msgfds[i]);
239 }
240
241 g_free(s->read_msgfds);
242 s->read_msgfds = 0;
243 s->read_msgfds_num = 0;
244 }
245
246 return to_copy;
247 }
248
249 static int tcp_set_msgfds(Chardev *chr, int *fds, int num)
250 {
251 SocketChardev *s = SOCKET_CHARDEV(chr);
252
253 /* clear old pending fd array */
254 g_free(s->write_msgfds);
255 s->write_msgfds = NULL;
256 s->write_msgfds_num = 0;
257
258 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) ||
259 !qio_channel_has_feature(s->ioc,
260 QIO_CHANNEL_FEATURE_FD_PASS)) {
261 return -1;
262 }
263
264 if (num) {
265 s->write_msgfds = g_new(int, num);
266 memcpy(s->write_msgfds, fds, num * sizeof(int));
267 }
268
269 s->write_msgfds_num = num;
270
271 return 0;
272 }
273
274 static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len)
275 {
276 SocketChardev *s = SOCKET_CHARDEV(chr);
277 struct iovec iov = { .iov_base = buf, .iov_len = len };
278 int ret;
279 size_t i;
280 int *msgfds = NULL;
281 size_t msgfds_num = 0;
282
283 if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) {
284 ret = qio_channel_readv_full(s->ioc, &iov, 1,
285 &msgfds, &msgfds_num,
286 NULL);
287 } else {
288 ret = qio_channel_readv_full(s->ioc, &iov, 1,
289 NULL, NULL,
290 NULL);
291 }
292
293 if (ret == QIO_CHANNEL_ERR_BLOCK) {
294 errno = EAGAIN;
295 ret = -1;
296 } else if (ret == -1) {
297 errno = EIO;
298 }
299
300 if (msgfds_num) {
301 /* close and clean read_msgfds */
302 for (i = 0; i < s->read_msgfds_num; i++) {
303 close(s->read_msgfds[i]);
304 }
305
306 if (s->read_msgfds_num) {
307 g_free(s->read_msgfds);
308 }
309
310 s->read_msgfds = msgfds;
311 s->read_msgfds_num = msgfds_num;
312 }
313
314 for (i = 0; i < s->read_msgfds_num; i++) {
315 int fd = s->read_msgfds[i];
316 if (fd < 0) {
317 continue;
318 }
319
320 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
321 qemu_set_block(fd);
322
323 #ifndef MSG_CMSG_CLOEXEC
324 qemu_set_cloexec(fd);
325 #endif
326 }
327
328 return ret;
329 }
330
331 static GSource *tcp_chr_add_watch(Chardev *chr, GIOCondition cond)
332 {
333 SocketChardev *s = SOCKET_CHARDEV(chr);
334 if (!s->ioc) {
335 return NULL;
336 }
337 return qio_channel_create_watch(s->ioc, cond);
338 }
339
340 static void remove_hup_source(SocketChardev *s)
341 {
342 if (s->hup_source != NULL) {
343 g_source_destroy(s->hup_source);
344 g_source_unref(s->hup_source);
345 s->hup_source = NULL;
346 }
347 }
348
349 static void char_socket_yank_iochannel(void *opaque)
350 {
351 QIOChannel *ioc = QIO_CHANNEL(opaque);
352
353 qio_channel_shutdown(ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL);
354 }
355
356 static void tcp_chr_free_connection(Chardev *chr)
357 {
358 SocketChardev *s = SOCKET_CHARDEV(chr);
359 int i;
360
361 if (s->read_msgfds_num) {
362 for (i = 0; i < s->read_msgfds_num; i++) {
363 close(s->read_msgfds[i]);
364 }
365 g_free(s->read_msgfds);
366 s->read_msgfds = NULL;
367 s->read_msgfds_num = 0;
368 }
369
370 remove_hup_source(s);
371
372 tcp_set_msgfds(chr, NULL, 0);
373 remove_fd_in_watch(chr);
374 if (s->registered_yank &&
375 (s->state == TCP_CHARDEV_STATE_CONNECTING
376 || s->state == TCP_CHARDEV_STATE_CONNECTED)) {
377 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label),
378 char_socket_yank_iochannel,
379 QIO_CHANNEL(s->sioc));
380 }
381 object_unref(OBJECT(s->sioc));
382 s->sioc = NULL;
383 object_unref(OBJECT(s->ioc));
384 s->ioc = NULL;
385 g_free(chr->filename);
386 chr->filename = NULL;
387 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED);
388 }
389
390 static const char *qemu_chr_socket_protocol(SocketChardev *s)
391 {
392 if (s->is_telnet) {
393 return "telnet";
394 }
395 return s->is_websock ? "websocket" : "tcp";
396 }
397
398 static char *qemu_chr_socket_address(SocketChardev *s, const char *prefix)
399 {
400 switch (s->addr->type) {
401 case SOCKET_ADDRESS_TYPE_INET:
402 return g_strdup_printf("%s%s:%s:%s%s", prefix,
403 qemu_chr_socket_protocol(s),
404 s->addr->u.inet.host,
405 s->addr->u.inet.port,
406 s->is_listen ? ",server=on" : "");
407 break;
408 case SOCKET_ADDRESS_TYPE_UNIX:
409 {
410 const char *tight = "", *abstract = "";
411 UnixSocketAddress *sa = &s->addr->u.q_unix;
412
413 #ifdef CONFIG_LINUX
414 if (sa->has_abstract && sa->abstract) {
415 abstract = ",abstract=on";
416 if (sa->has_tight && sa->tight) {
417 tight = ",tight=on";
418 }
419 }
420 #endif
421
422 return g_strdup_printf("%sunix:%s%s%s%s", prefix, sa->path,
423 abstract, tight,
424 s->is_listen ? ",server=on" : "");
425 break;
426 }
427 case SOCKET_ADDRESS_TYPE_FD:
428 return g_strdup_printf("%sfd:%s%s", prefix, s->addr->u.fd.str,
429 s->is_listen ? ",server=on" : "");
430 break;
431 case SOCKET_ADDRESS_TYPE_VSOCK:
432 return g_strdup_printf("%svsock:%s:%s", prefix,
433 s->addr->u.vsock.cid,
434 s->addr->u.vsock.port);
435 default:
436 abort();
437 }
438 }
439
440 static void update_disconnected_filename(SocketChardev *s)
441 {
442 Chardev *chr = CHARDEV(s);
443
444 g_free(chr->filename);
445 if (s->addr) {
446 chr->filename = qemu_chr_socket_address(s, "disconnected:");
447 } else {
448 chr->filename = g_strdup("disconnected:socket");
449 }
450 }
451
452 /* NB may be called even if tcp_chr_connect has not been
453 * reached, due to TLS or telnet initialization failure,
454 * so can *not* assume s->state == TCP_CHARDEV_STATE_CONNECTED
455 * This must be called with chr->chr_write_lock held.
456 */
457 static void tcp_chr_disconnect_locked(Chardev *chr)
458 {
459 SocketChardev *s = SOCKET_CHARDEV(chr);
460 bool emit_close = s->state == TCP_CHARDEV_STATE_CONNECTED;
461
462 tcp_chr_free_connection(chr);
463
464 if (s->listener) {
465 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept,
466 chr, NULL, chr->gcontext);
467 }
468 update_disconnected_filename(s);
469 if (emit_close) {
470 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
471 }
472 if (s->reconnect_time && !s->reconnect_timer) {
473 qemu_chr_socket_restart_timer(chr);
474 }
475 }
476
477 static void tcp_chr_disconnect(Chardev *chr)
478 {
479 qemu_mutex_lock(&chr->chr_write_lock);
480 tcp_chr_disconnect_locked(chr);
481 qemu_mutex_unlock(&chr->chr_write_lock);
482 }
483
484 static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
485 {
486 Chardev *chr = CHARDEV(opaque);
487 SocketChardev *s = SOCKET_CHARDEV(opaque);
488 uint8_t buf[CHR_READ_BUF_LEN];
489 int len, size;
490
491 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) ||
492 s->max_size <= 0) {
493 return TRUE;
494 }
495 len = sizeof(buf);
496 if (len > s->max_size) {
497 len = s->max_size;
498 }
499 size = tcp_chr_recv(chr, (void *)buf, len);
500 if (size == 0 || (size == -1 && errno != EAGAIN)) {
501 /* connection closed */
502 tcp_chr_disconnect(chr);
503 } else if (size > 0) {
504 if (s->do_telnetopt) {
505 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
506 }
507 if (size > 0) {
508 qemu_chr_be_write(chr, buf, size);
509 }
510 }
511
512 return TRUE;
513 }
514
515 static gboolean tcp_chr_hup(QIOChannel *channel,
516 GIOCondition cond,
517 void *opaque)
518 {
519 Chardev *chr = CHARDEV(opaque);
520 tcp_chr_disconnect(chr);
521 return G_SOURCE_REMOVE;
522 }
523
524 static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len)
525 {
526 SocketChardev *s = SOCKET_CHARDEV(chr);
527 int size;
528
529 if (s->state != TCP_CHARDEV_STATE_CONNECTED) {
530 return 0;
531 }
532
533 qio_channel_set_blocking(s->ioc, true, NULL);
534 size = tcp_chr_recv(chr, (void *) buf, len);
535 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) {
536 qio_channel_set_blocking(s->ioc, false, NULL);
537 }
538 if (size == 0) {
539 /* connection closed */
540 tcp_chr_disconnect(chr);
541 }
542
543 return size;
544 }
545
546 static char *qemu_chr_compute_filename(SocketChardev *s)
547 {
548 struct sockaddr_storage *ss = &s->sioc->localAddr;
549 struct sockaddr_storage *ps = &s->sioc->remoteAddr;
550 socklen_t ss_len = s->sioc->localAddrLen;
551 socklen_t ps_len = s->sioc->remoteAddrLen;
552 char shost[NI_MAXHOST], sserv[NI_MAXSERV];
553 char phost[NI_MAXHOST], pserv[NI_MAXSERV];
554 const char *left = "", *right = "";
555
556 switch (ss->ss_family) {
557 #ifndef _WIN32
558 case AF_UNIX:
559 return g_strdup_printf("unix:%s%s",
560 ((struct sockaddr_un *)(ss))->sun_path,
561 s->is_listen ? ",server=on" : "");
562 #endif
563 case AF_INET6:
564 left = "[";
565 right = "]";
566 /* fall through */
567 case AF_INET:
568 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost),
569 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV);
570 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost),
571 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV);
572 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s",
573 qemu_chr_socket_protocol(s),
574 left, shost, right, sserv,
575 s->is_listen ? ",server=on" : "",
576 left, phost, right, pserv);
577
578 default:
579 return g_strdup_printf("unknown");
580 }
581 }
582
583 static void update_ioc_handlers(SocketChardev *s)
584 {
585 Chardev *chr = CHARDEV(s);
586
587 if (s->state != TCP_CHARDEV_STATE_CONNECTED) {
588 return;
589 }
590
591 remove_fd_in_watch(chr);
592 chr->gsource = io_add_watch_poll(chr, s->ioc,
593 tcp_chr_read_poll,
594 tcp_chr_read, chr,
595 chr->gcontext);
596
597 remove_hup_source(s);
598 s->hup_source = qio_channel_create_watch(s->ioc, G_IO_HUP);
599 g_source_set_callback(s->hup_source, (GSourceFunc)tcp_chr_hup,
600 chr, NULL);
601 g_source_attach(s->hup_source, chr->gcontext);
602 }
603
604 static void tcp_chr_connect(void *opaque)
605 {
606 Chardev *chr = CHARDEV(opaque);
607 SocketChardev *s = SOCKET_CHARDEV(opaque);
608
609 g_free(chr->filename);
610 chr->filename = qemu_chr_compute_filename(s);
611
612 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTED);
613 update_ioc_handlers(s);
614 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
615 }
616
617 static void tcp_chr_telnet_destroy(SocketChardev *s)
618 {
619 if (s->telnet_source) {
620 g_source_destroy(s->telnet_source);
621 g_source_unref(s->telnet_source);
622 s->telnet_source = NULL;
623 }
624 }
625
626 static void tcp_chr_update_read_handler(Chardev *chr)
627 {
628 SocketChardev *s = SOCKET_CHARDEV(chr);
629
630 if (s->listener && s->state == TCP_CHARDEV_STATE_DISCONNECTED) {
631 /*
632 * It's possible that chardev context is changed in
633 * qemu_chr_be_update_read_handlers(). Reset it for QIO net
634 * listener if there is.
635 */
636 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept,
637 chr, NULL, chr->gcontext);
638 }
639
640 if (s->telnet_source) {
641 tcp_chr_telnet_init(CHARDEV(s));
642 }
643
644 update_ioc_handlers(s);
645 }
646
647 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc,
648 GIOCondition cond G_GNUC_UNUSED,
649 gpointer user_data)
650 {
651 SocketChardev *s = user_data;
652 Chardev *chr = CHARDEV(s);
653 TCPChardevTelnetInit *init = s->telnet_init;
654 ssize_t ret;
655
656 assert(init);
657
658 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL);
659 if (ret < 0) {
660 if (ret == QIO_CHANNEL_ERR_BLOCK) {
661 ret = 0;
662 } else {
663 tcp_chr_disconnect(chr);
664 goto end;
665 }
666 }
667 init->buflen -= ret;
668
669 if (init->buflen == 0) {
670 tcp_chr_connect(chr);
671 goto end;
672 }
673
674 memmove(init->buf, init->buf + ret, init->buflen);
675
676 return G_SOURCE_CONTINUE;
677
678 end:
679 g_free(s->telnet_init);
680 s->telnet_init = NULL;
681 g_source_unref(s->telnet_source);
682 s->telnet_source = NULL;
683 return G_SOURCE_REMOVE;
684 }
685
686 static void tcp_chr_telnet_init(Chardev *chr)
687 {
688 SocketChardev *s = SOCKET_CHARDEV(chr);
689 TCPChardevTelnetInit *init;
690 size_t n = 0;
691
692 /* Destroy existing task */
693 tcp_chr_telnet_destroy(s);
694
695 if (s->telnet_init) {
696 /* We are possibly during a handshake already */
697 goto cont;
698 }
699
700 s->telnet_init = g_new0(TCPChardevTelnetInit, 1);
701 init = s->telnet_init;
702
703 #define IACSET(x, a, b, c) \
704 do { \
705 x[n++] = a; \
706 x[n++] = b; \
707 x[n++] = c; \
708 } while (0)
709
710 if (!s->is_tn3270) {
711 init->buflen = 12;
712 /* Prep the telnet negotion to put telnet in binary,
713 * no echo, single char mode */
714 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
715 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
716 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
717 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
718 } else {
719 init->buflen = 21;
720 /* Prep the TN3270 negotion based on RFC1576 */
721 IACSET(init->buf, 0xff, 0xfd, 0x19); /* IAC DO EOR */
722 IACSET(init->buf, 0xff, 0xfb, 0x19); /* IAC WILL EOR */
723 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO BINARY */
724 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL BINARY */
725 IACSET(init->buf, 0xff, 0xfd, 0x18); /* IAC DO TERMINAL TYPE */
726 IACSET(init->buf, 0xff, 0xfa, 0x18); /* IAC SB TERMINAL TYPE */
727 IACSET(init->buf, 0x01, 0xff, 0xf0); /* SEND IAC SE */
728 }
729
730 #undef IACSET
731
732 cont:
733 s->telnet_source = qio_channel_add_watch_source(s->ioc, G_IO_OUT,
734 tcp_chr_telnet_init_io,
735 s, NULL,
736 chr->gcontext);
737 }
738
739
740 static void tcp_chr_websock_handshake(QIOTask *task, gpointer user_data)
741 {
742 Chardev *chr = user_data;
743 SocketChardev *s = user_data;
744
745 if (qio_task_propagate_error(task, NULL)) {
746 tcp_chr_disconnect(chr);
747 } else {
748 if (s->do_telnetopt) {
749 tcp_chr_telnet_init(chr);
750 } else {
751 tcp_chr_connect(chr);
752 }
753 }
754 }
755
756
757 static void tcp_chr_websock_init(Chardev *chr)
758 {
759 SocketChardev *s = SOCKET_CHARDEV(chr);
760 QIOChannelWebsock *wioc = NULL;
761 gchar *name;
762
763 wioc = qio_channel_websock_new_server(s->ioc);
764
765 name = g_strdup_printf("chardev-websocket-server-%s", chr->label);
766 qio_channel_set_name(QIO_CHANNEL(wioc), name);
767 g_free(name);
768 object_unref(OBJECT(s->ioc));
769 s->ioc = QIO_CHANNEL(wioc);
770
771 qio_channel_websock_handshake(wioc, tcp_chr_websock_handshake, chr, NULL);
772 }
773
774
775 static void tcp_chr_tls_handshake(QIOTask *task,
776 gpointer user_data)
777 {
778 Chardev *chr = user_data;
779 SocketChardev *s = user_data;
780
781 if (qio_task_propagate_error(task, NULL)) {
782 tcp_chr_disconnect(chr);
783 } else {
784 if (s->is_websock) {
785 tcp_chr_websock_init(chr);
786 } else if (s->do_telnetopt) {
787 tcp_chr_telnet_init(chr);
788 } else {
789 tcp_chr_connect(chr);
790 }
791 }
792 }
793
794
795 static void tcp_chr_tls_init(Chardev *chr)
796 {
797 SocketChardev *s = SOCKET_CHARDEV(chr);
798 QIOChannelTLS *tioc;
799 gchar *name;
800
801 if (s->is_listen) {
802 tioc = qio_channel_tls_new_server(
803 s->ioc, s->tls_creds,
804 s->tls_authz,
805 NULL);
806 } else {
807 tioc = qio_channel_tls_new_client(
808 s->ioc, s->tls_creds,
809 s->addr->u.inet.host,
810 NULL);
811 }
812 if (tioc == NULL) {
813 tcp_chr_disconnect(chr);
814 return;
815 }
816 name = g_strdup_printf("chardev-tls-%s-%s",
817 s->is_listen ? "server" : "client",
818 chr->label);
819 qio_channel_set_name(QIO_CHANNEL(tioc), name);
820 g_free(name);
821 object_unref(OBJECT(s->ioc));
822 s->ioc = QIO_CHANNEL(tioc);
823
824 qio_channel_tls_handshake(tioc,
825 tcp_chr_tls_handshake,
826 chr,
827 NULL,
828 chr->gcontext);
829 }
830
831
832 static void tcp_chr_set_client_ioc_name(Chardev *chr,
833 QIOChannelSocket *sioc)
834 {
835 SocketChardev *s = SOCKET_CHARDEV(chr);
836 char *name;
837 name = g_strdup_printf("chardev-tcp-%s-%s",
838 s->is_listen ? "server" : "client",
839 chr->label);
840 qio_channel_set_name(QIO_CHANNEL(sioc), name);
841 g_free(name);
842
843 }
844
845 static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc)
846 {
847 SocketChardev *s = SOCKET_CHARDEV(chr);
848
849 if (s->state != TCP_CHARDEV_STATE_CONNECTING) {
850 return -1;
851 }
852
853 s->ioc = QIO_CHANNEL(sioc);
854 object_ref(OBJECT(sioc));
855 s->sioc = sioc;
856 object_ref(OBJECT(sioc));
857
858 qio_channel_set_blocking(s->ioc, false, NULL);
859
860 if (s->do_nodelay) {
861 qio_channel_set_delay(s->ioc, false);
862 }
863 if (s->listener) {
864 qio_net_listener_set_client_func_full(s->listener, NULL, NULL,
865 NULL, chr->gcontext);
866 }
867
868 if (s->tls_creds) {
869 tcp_chr_tls_init(chr);
870 } else if (s->is_websock) {
871 tcp_chr_websock_init(chr);
872 } else if (s->do_telnetopt) {
873 tcp_chr_telnet_init(chr);
874 } else {
875 tcp_chr_connect(chr);
876 }
877
878 return 0;
879 }
880
881
882 static int tcp_chr_add_client(Chardev *chr, int fd)
883 {
884 int ret;
885 QIOChannelSocket *sioc;
886 SocketChardev *s = SOCKET_CHARDEV(chr);
887
888 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) {
889 return -1;
890 }
891
892 sioc = qio_channel_socket_new_fd(fd, NULL);
893 if (!sioc) {
894 return -1;
895 }
896 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
897 tcp_chr_set_client_ioc_name(chr, sioc);
898 if (s->registered_yank) {
899 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
900 char_socket_yank_iochannel,
901 QIO_CHANNEL(sioc));
902 }
903 ret = tcp_chr_new_client(chr, sioc);
904 object_unref(OBJECT(sioc));
905 return ret;
906 }
907
908 static void tcp_chr_accept(QIONetListener *listener,
909 QIOChannelSocket *cioc,
910 void *opaque)
911 {
912 Chardev *chr = CHARDEV(opaque);
913 SocketChardev *s = SOCKET_CHARDEV(chr);
914
915 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
916 tcp_chr_set_client_ioc_name(chr, cioc);
917 if (s->registered_yank) {
918 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
919 char_socket_yank_iochannel,
920 QIO_CHANNEL(cioc));
921 }
922 tcp_chr_new_client(chr, cioc);
923 }
924
925
926 static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp)
927 {
928 SocketChardev *s = SOCKET_CHARDEV(chr);
929 QIOChannelSocket *sioc = qio_channel_socket_new();
930 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
931 tcp_chr_set_client_ioc_name(chr, sioc);
932 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) {
933 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED);
934 object_unref(OBJECT(sioc));
935 return -1;
936 }
937 if (s->registered_yank) {
938 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
939 char_socket_yank_iochannel,
940 QIO_CHANNEL(sioc));
941 }
942 tcp_chr_new_client(chr, sioc);
943 object_unref(OBJECT(sioc));
944 return 0;
945 }
946
947
948 static void tcp_chr_accept_server_sync(Chardev *chr)
949 {
950 SocketChardev *s = SOCKET_CHARDEV(chr);
951 QIOChannelSocket *sioc;
952 info_report("QEMU waiting for connection on: %s",
953 chr->filename);
954 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
955 sioc = qio_net_listener_wait_client(s->listener);
956 tcp_chr_set_client_ioc_name(chr, sioc);
957 if (s->registered_yank) {
958 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
959 char_socket_yank_iochannel,
960 QIO_CHANNEL(sioc));
961 }
962 tcp_chr_new_client(chr, sioc);
963 object_unref(OBJECT(sioc));
964 }
965
966
967 static int tcp_chr_wait_connected(Chardev *chr, Error **errp)
968 {
969 SocketChardev *s = SOCKET_CHARDEV(chr);
970 const char *opts[] = { "telnet", "tn3270", "websock", "tls-creds" };
971 bool optset[] = { s->is_telnet, s->is_tn3270, s->is_websock, s->tls_creds };
972 size_t i;
973
974 QEMU_BUILD_BUG_ON(G_N_ELEMENTS(opts) != G_N_ELEMENTS(optset));
975 for (i = 0; i < G_N_ELEMENTS(opts); i++) {
976 if (optset[i]) {
977 error_setg(errp,
978 "'%s' option is incompatible with waiting for "
979 "connection completion", opts[i]);
980 return -1;
981 }
982 }
983
984 tcp_chr_reconn_timer_cancel(s);
985
986 /*
987 * We expect states to be as follows:
988 *
989 * - server
990 * - wait -> CONNECTED
991 * - nowait -> DISCONNECTED
992 * - client
993 * - reconnect == 0 -> CONNECTED
994 * - reconnect != 0 -> CONNECTING
995 *
996 */
997 if (s->state == TCP_CHARDEV_STATE_CONNECTING) {
998 if (!s->connect_task) {
999 error_setg(errp,
1000 "Unexpected 'connecting' state without connect task "
1001 "while waiting for connection completion");
1002 return -1;
1003 }
1004 /*
1005 * tcp_chr_wait_connected should only ever be run from the
1006 * main loop thread associated with chr->gcontext, otherwise
1007 * qio_task_wait_thread has a dangerous race condition with
1008 * free'ing of the s->connect_task object.
1009 *
1010 * Acquiring the main context doesn't 100% prove we're in
1011 * the main loop thread, but it does at least guarantee
1012 * that the main loop won't be executed by another thread
1013 * avoiding the race condition with the task idle callback.
1014 */
1015 g_main_context_acquire(chr->gcontext);
1016 qio_task_wait_thread(s->connect_task);
1017 g_main_context_release(chr->gcontext);
1018
1019 /*
1020 * The completion callback (qemu_chr_socket_connected) for
1021 * s->connect_task should have set this to NULL by the time
1022 * qio_task_wait_thread has returned.
1023 */
1024 assert(!s->connect_task);
1025
1026 /*
1027 * NB we are *not* guaranteed to have "s->state == ..CONNECTED"
1028 * at this point as this first connect may be failed, so
1029 * allow the next loop to run regardless.
1030 */
1031 }
1032
1033 while (s->state != TCP_CHARDEV_STATE_CONNECTED) {
1034 if (s->is_listen) {
1035 tcp_chr_accept_server_sync(chr);
1036 } else {
1037 Error *err = NULL;
1038 if (tcp_chr_connect_client_sync(chr, &err) < 0) {
1039 if (s->reconnect_time) {
1040 error_free(err);
1041 g_usleep(s->reconnect_time * 1000ULL * 1000ULL);
1042 } else {
1043 error_propagate(errp, err);
1044 return -1;
1045 }
1046 }
1047 }
1048 }
1049
1050 return 0;
1051 }
1052
1053 static void char_socket_finalize(Object *obj)
1054 {
1055 Chardev *chr = CHARDEV(obj);
1056 SocketChardev *s = SOCKET_CHARDEV(obj);
1057
1058 tcp_chr_free_connection(chr);
1059 tcp_chr_reconn_timer_cancel(s);
1060 qapi_free_SocketAddress(s->addr);
1061 tcp_chr_telnet_destroy(s);
1062 g_free(s->telnet_init);
1063 if (s->listener) {
1064 qio_net_listener_set_client_func_full(s->listener, NULL, NULL,
1065 NULL, chr->gcontext);
1066 object_unref(OBJECT(s->listener));
1067 }
1068 if (s->tls_creds) {
1069 object_unref(OBJECT(s->tls_creds));
1070 }
1071 g_free(s->tls_authz);
1072 if (s->registered_yank) {
1073 /*
1074 * In the chardev-change special-case, we shouldn't unregister the yank
1075 * instance, as it still may be needed.
1076 */
1077 if (!chr->handover_yank_instance) {
1078 yank_unregister_instance(CHARDEV_YANK_INSTANCE(chr->label));
1079 }
1080 }
1081
1082 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1083 }
1084
1085 static void qemu_chr_socket_connected(QIOTask *task, void *opaque)
1086 {
1087 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
1088 Chardev *chr = CHARDEV(opaque);
1089 SocketChardev *s = SOCKET_CHARDEV(chr);
1090 Error *err = NULL;
1091
1092 s->connect_task = NULL;
1093
1094 if (qio_task_propagate_error(task, &err)) {
1095 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED);
1096 if (s->registered_yank) {
1097 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label),
1098 char_socket_yank_iochannel,
1099 QIO_CHANNEL(sioc));
1100 }
1101 check_report_connect_error(chr, err);
1102 goto cleanup;
1103 }
1104
1105 s->connect_err_reported = false;
1106 tcp_chr_new_client(chr, sioc);
1107
1108 cleanup:
1109 object_unref(OBJECT(sioc));
1110 }
1111
1112
1113 static void tcp_chr_connect_client_task(QIOTask *task,
1114 gpointer opaque)
1115 {
1116 QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
1117 SocketAddress *addr = opaque;
1118 Error *err = NULL;
1119
1120 qio_channel_socket_connect_sync(ioc, addr, &err);
1121
1122 qio_task_set_error(task, err);
1123 }
1124
1125
1126 static void tcp_chr_connect_client_async(Chardev *chr)
1127 {
1128 SocketChardev *s = SOCKET_CHARDEV(chr);
1129 QIOChannelSocket *sioc;
1130
1131 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
1132 sioc = qio_channel_socket_new();
1133 tcp_chr_set_client_ioc_name(chr, sioc);
1134 if (s->registered_yank) {
1135 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
1136 char_socket_yank_iochannel,
1137 QIO_CHANNEL(sioc));
1138 }
1139 /*
1140 * Normally code would use the qio_channel_socket_connect_async
1141 * method which uses a QIOTask + qio_task_set_error internally
1142 * to avoid blocking. The tcp_chr_wait_connected method, however,
1143 * needs a way to synchronize with completion of the background
1144 * connect task which can't be done with the QIOChannelSocket
1145 * async APIs. Thus we must use QIOTask directly to implement
1146 * the non-blocking concept locally.
1147 */
1148 s->connect_task = qio_task_new(OBJECT(sioc),
1149 qemu_chr_socket_connected,
1150 object_ref(OBJECT(chr)),
1151 (GDestroyNotify)object_unref);
1152 qio_task_run_in_thread(s->connect_task,
1153 tcp_chr_connect_client_task,
1154 s->addr,
1155 NULL,
1156 chr->gcontext);
1157 }
1158
1159 static gboolean socket_reconnect_timeout(gpointer opaque)
1160 {
1161 Chardev *chr = CHARDEV(opaque);
1162 SocketChardev *s = SOCKET_CHARDEV(opaque);
1163
1164 qemu_mutex_lock(&chr->chr_write_lock);
1165 g_source_unref(s->reconnect_timer);
1166 s->reconnect_timer = NULL;
1167 qemu_mutex_unlock(&chr->chr_write_lock);
1168
1169 if (chr->be_open) {
1170 return false;
1171 }
1172
1173 tcp_chr_connect_client_async(chr);
1174
1175 return false;
1176 }
1177
1178
1179 static int qmp_chardev_open_socket_server(Chardev *chr,
1180 bool is_telnet,
1181 bool is_waitconnect,
1182 Error **errp)
1183 {
1184 SocketChardev *s = SOCKET_CHARDEV(chr);
1185 char *name;
1186 if (is_telnet) {
1187 s->do_telnetopt = 1;
1188 }
1189 s->listener = qio_net_listener_new();
1190
1191 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label);
1192 qio_net_listener_set_name(s->listener, name);
1193 g_free(name);
1194
1195 if (s->addr->type == SOCKET_ADDRESS_TYPE_FD && !*s->addr->u.fd.str) {
1196 goto skip_listen;
1197 }
1198
1199 if (qio_net_listener_open_sync(s->listener, s->addr, 1, errp) < 0) {
1200 object_unref(OBJECT(s->listener));
1201 s->listener = NULL;
1202 return -1;
1203 }
1204
1205 qapi_free_SocketAddress(s->addr);
1206 s->addr = socket_local_address(s->listener->sioc[0]->fd, errp);
1207
1208 skip_listen:
1209 update_disconnected_filename(s);
1210
1211 if (is_waitconnect) {
1212 tcp_chr_accept_server_sync(chr);
1213 } else {
1214 qio_net_listener_set_client_func_full(s->listener,
1215 tcp_chr_accept,
1216 chr, NULL,
1217 chr->gcontext);
1218 }
1219
1220 return 0;
1221 }
1222
1223
1224 static int qmp_chardev_open_socket_client(Chardev *chr,
1225 int64_t reconnect,
1226 Error **errp)
1227 {
1228 SocketChardev *s = SOCKET_CHARDEV(chr);
1229
1230 if (reconnect > 0) {
1231 s->reconnect_time = reconnect;
1232 tcp_chr_connect_client_async(chr);
1233 return 0;
1234 } else {
1235 return tcp_chr_connect_client_sync(chr, errp);
1236 }
1237 }
1238
1239
1240 static bool qmp_chardev_validate_socket(ChardevSocket *sock,
1241 SocketAddress *addr,
1242 Error **errp)
1243 {
1244 /* Validate any options which have a dependency on address type */
1245 switch (addr->type) {
1246 case SOCKET_ADDRESS_TYPE_FD:
1247 if (sock->has_reconnect) {
1248 error_setg(errp,
1249 "'reconnect' option is incompatible with "
1250 "'fd' address type");
1251 return false;
1252 }
1253 if (sock->has_tls_creds &&
1254 !(sock->has_server && sock->server)) {
1255 error_setg(errp,
1256 "'tls_creds' option is incompatible with "
1257 "'fd' address type as client");
1258 return false;
1259 }
1260 break;
1261
1262 case SOCKET_ADDRESS_TYPE_UNIX:
1263 if (sock->has_tls_creds) {
1264 error_setg(errp,
1265 "'tls_creds' option is incompatible with "
1266 "'unix' address type");
1267 return false;
1268 }
1269 break;
1270
1271 case SOCKET_ADDRESS_TYPE_INET:
1272 break;
1273
1274 case SOCKET_ADDRESS_TYPE_VSOCK:
1275 if (sock->has_tls_creds) {
1276 error_setg(errp,
1277 "'tls_creds' option is incompatible with "
1278 "'vsock' address type");
1279 return false;
1280 }
1281
1282 default:
1283 break;
1284 }
1285
1286 if (sock->has_tls_authz && !sock->has_tls_creds) {
1287 error_setg(errp, "'tls_authz' option requires 'tls_creds' option");
1288 return false;
1289 }
1290
1291 /* Validate any options which have a dependancy on client vs server */
1292 if (!sock->has_server || sock->server) {
1293 if (sock->has_reconnect) {
1294 error_setg(errp,
1295 "'reconnect' option is incompatible with "
1296 "socket in server listen mode");
1297 return false;
1298 }
1299 } else {
1300 if (sock->has_websocket && sock->websocket) {
1301 error_setg(errp, "%s", "Websocket client is not implemented");
1302 return false;
1303 }
1304 if (sock->has_wait) {
1305 error_setg(errp, "%s",
1306 "'wait' option is incompatible with "
1307 "socket in client connect mode");
1308 return false;
1309 }
1310 }
1311
1312 return true;
1313 }
1314
1315
1316 static void qmp_chardev_open_socket(Chardev *chr,
1317 ChardevBackend *backend,
1318 bool *be_opened,
1319 Error **errp)
1320 {
1321 SocketChardev *s = SOCKET_CHARDEV(chr);
1322 ChardevSocket *sock = backend->u.socket.data;
1323 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
1324 bool is_listen = sock->has_server ? sock->server : true;
1325 bool is_telnet = sock->has_telnet ? sock->telnet : false;
1326 bool is_tn3270 = sock->has_tn3270 ? sock->tn3270 : false;
1327 bool is_waitconnect = sock->has_wait ? sock->wait : false;
1328 bool is_websock = sock->has_websocket ? sock->websocket : false;
1329 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0;
1330 SocketAddress *addr;
1331
1332 s->is_listen = is_listen;
1333 s->is_telnet = is_telnet;
1334 s->is_tn3270 = is_tn3270;
1335 s->is_websock = is_websock;
1336 s->do_nodelay = do_nodelay;
1337 if (sock->tls_creds) {
1338 Object *creds;
1339 creds = object_resolve_path_component(
1340 object_get_objects_root(), sock->tls_creds);
1341 if (!creds) {
1342 error_setg(errp, "No TLS credentials with id '%s'",
1343 sock->tls_creds);
1344 return;
1345 }
1346 s->tls_creds = (QCryptoTLSCreds *)
1347 object_dynamic_cast(creds,
1348 TYPE_QCRYPTO_TLS_CREDS);
1349 if (!s->tls_creds) {
1350 error_setg(errp, "Object with id '%s' is not TLS credentials",
1351 sock->tls_creds);
1352 return;
1353 }
1354 object_ref(OBJECT(s->tls_creds));
1355 if (!qcrypto_tls_creds_check_endpoint(s->tls_creds,
1356 is_listen
1357 ? QCRYPTO_TLS_CREDS_ENDPOINT_SERVER
1358 : QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT,
1359 errp)) {
1360 return;
1361 }
1362 }
1363 s->tls_authz = g_strdup(sock->tls_authz);
1364
1365 s->addr = addr = socket_address_flatten(sock->addr);
1366
1367 if (!qmp_chardev_validate_socket(sock, addr, errp)) {
1368 return;
1369 }
1370
1371 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE);
1372 /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */
1373 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) {
1374 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS);
1375 }
1376
1377 /*
1378 * In the chardev-change special-case, we shouldn't register a new yank
1379 * instance, as there already may be one.
1380 */
1381 if (!chr->handover_yank_instance) {
1382 if (!yank_register_instance(CHARDEV_YANK_INSTANCE(chr->label), errp)) {
1383 return;
1384 }
1385 }
1386 s->registered_yank = true;
1387
1388 /* be isn't opened until we get a connection */
1389 *be_opened = false;
1390
1391 update_disconnected_filename(s);
1392
1393 if (s->is_listen) {
1394 if (qmp_chardev_open_socket_server(chr, is_telnet || is_tn3270,
1395 is_waitconnect, errp) < 0) {
1396 return;
1397 }
1398 } else {
1399 if (qmp_chardev_open_socket_client(chr, reconnect, errp) < 0) {
1400 return;
1401 }
1402 }
1403 }
1404
1405 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
1406 Error **errp)
1407 {
1408 const char *path = qemu_opt_get(opts, "path");
1409 const char *host = qemu_opt_get(opts, "host");
1410 const char *port = qemu_opt_get(opts, "port");
1411 const char *fd = qemu_opt_get(opts, "fd");
1412 #ifdef CONFIG_LINUX
1413 bool tight = qemu_opt_get_bool(opts, "tight", true);
1414 bool abstract = qemu_opt_get_bool(opts, "abstract", false);
1415 #endif
1416 SocketAddressLegacy *addr;
1417 ChardevSocket *sock;
1418
1419 if ((!!path + !!fd + !!host) > 1) {
1420 error_setg(errp,
1421 "None or one of 'path', 'fd' or 'host' option required.");
1422 return;
1423 }
1424
1425 if (host && !port) {
1426 error_setg(errp, "chardev: socket: no port given");
1427 return;
1428 }
1429
1430 backend->type = CHARDEV_BACKEND_KIND_SOCKET;
1431 sock = backend->u.socket.data = g_new0(ChardevSocket, 1);
1432 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock));
1433
1434 if (qemu_opt_get(opts, "delay") && qemu_opt_get(opts, "nodelay")) {
1435 error_setg(errp, "'delay' and 'nodelay' are mutually exclusive");
1436 return;
1437 }
1438 sock->has_nodelay =
1439 qemu_opt_get(opts, "delay") ||
1440 qemu_opt_get(opts, "nodelay");
1441 sock->nodelay =
1442 !qemu_opt_get_bool(opts, "delay", true) ||
1443 qemu_opt_get_bool(opts, "nodelay", false);
1444
1445 /*
1446 * We have different default to QMP for 'server', hence
1447 * we can't just check for existence of 'server'
1448 */
1449 sock->has_server = true;
1450 sock->server = qemu_opt_get_bool(opts, "server", false);
1451 sock->has_telnet = qemu_opt_get(opts, "telnet");
1452 sock->telnet = qemu_opt_get_bool(opts, "telnet", false);
1453 sock->has_tn3270 = qemu_opt_get(opts, "tn3270");
1454 sock->tn3270 = qemu_opt_get_bool(opts, "tn3270", false);
1455 sock->has_websocket = qemu_opt_get(opts, "websocket");
1456 sock->websocket = qemu_opt_get_bool(opts, "websocket", false);
1457 /*
1458 * We have different default to QMP for 'wait' when 'server'
1459 * is set, hence we can't just check for existence of 'wait'
1460 */
1461 sock->has_wait = qemu_opt_find(opts, "wait") || sock->server;
1462 sock->wait = qemu_opt_get_bool(opts, "wait", true);
1463 sock->has_reconnect = qemu_opt_find(opts, "reconnect");
1464 sock->reconnect = qemu_opt_get_number(opts, "reconnect", 0);
1465 sock->has_tls_creds = qemu_opt_get(opts, "tls-creds");
1466 sock->tls_creds = g_strdup(qemu_opt_get(opts, "tls-creds"));
1467 sock->has_tls_authz = qemu_opt_get(opts, "tls-authz");
1468 sock->tls_authz = g_strdup(qemu_opt_get(opts, "tls-authz"));
1469
1470 addr = g_new0(SocketAddressLegacy, 1);
1471 if (path) {
1472 UnixSocketAddress *q_unix;
1473 addr->type = SOCKET_ADDRESS_TYPE_UNIX;
1474 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1);
1475 q_unix->path = g_strdup(path);
1476 #ifdef CONFIG_LINUX
1477 q_unix->has_tight = true;
1478 q_unix->tight = tight;
1479 q_unix->has_abstract = true;
1480 q_unix->abstract = abstract;
1481 #endif
1482 } else if (host) {
1483 addr->type = SOCKET_ADDRESS_TYPE_INET;
1484 addr->u.inet.data = g_new(InetSocketAddress, 1);
1485 *addr->u.inet.data = (InetSocketAddress) {
1486 .host = g_strdup(host),
1487 .port = g_strdup(port),
1488 .has_to = qemu_opt_get(opts, "to"),
1489 .to = qemu_opt_get_number(opts, "to", 0),
1490 .has_ipv4 = qemu_opt_get(opts, "ipv4"),
1491 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0),
1492 .has_ipv6 = qemu_opt_get(opts, "ipv6"),
1493 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0),
1494 };
1495 } else {
1496 addr->type = SOCKET_ADDRESS_TYPE_FD;
1497 addr->u.fd.data = g_new(String, 1);
1498 addr->u.fd.data->str = g_strdup(fd);
1499 }
1500 sock->addr = addr;
1501 }
1502
1503 static void
1504 char_socket_get_addr(Object *obj, Visitor *v, const char *name,
1505 void *opaque, Error **errp)
1506 {
1507 SocketChardev *s = SOCKET_CHARDEV(obj);
1508
1509 visit_type_SocketAddress(v, name, &s->addr, errp);
1510 }
1511
1512 static bool
1513 char_socket_get_connected(Object *obj, Error **errp)
1514 {
1515 SocketChardev *s = SOCKET_CHARDEV(obj);
1516
1517 return s->state == TCP_CHARDEV_STATE_CONNECTED;
1518 }
1519
1520 static void char_socket_class_init(ObjectClass *oc, void *data)
1521 {
1522 ChardevClass *cc = CHARDEV_CLASS(oc);
1523
1524 cc->supports_yank = true;
1525
1526 cc->parse = qemu_chr_parse_socket;
1527 cc->open = qmp_chardev_open_socket;
1528 cc->chr_wait_connected = tcp_chr_wait_connected;
1529 cc->chr_write = tcp_chr_write;
1530 cc->chr_sync_read = tcp_chr_sync_read;
1531 cc->chr_disconnect = tcp_chr_disconnect;
1532 cc->get_msgfds = tcp_get_msgfds;
1533 cc->set_msgfds = tcp_set_msgfds;
1534 cc->chr_add_client = tcp_chr_add_client;
1535 cc->chr_add_watch = tcp_chr_add_watch;
1536 cc->chr_update_read_handler = tcp_chr_update_read_handler;
1537
1538 object_class_property_add(oc, "addr", "SocketAddress",
1539 char_socket_get_addr, NULL,
1540 NULL, NULL);
1541
1542 object_class_property_add_bool(oc, "connected", char_socket_get_connected,
1543 NULL);
1544 }
1545
1546 static const TypeInfo char_socket_type_info = {
1547 .name = TYPE_CHARDEV_SOCKET,
1548 .parent = TYPE_CHARDEV,
1549 .instance_size = sizeof(SocketChardev),
1550 .instance_finalize = char_socket_finalize,
1551 .class_init = char_socket_class_init,
1552 };
1553
1554 static void register_types(void)
1555 {
1556 type_register_static(&char_socket_type_info);
1557 }
1558
1559 type_init(register_types);
QEmu