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 0, NULL); 287 } else { 288 ret = qio_channel_readv_full(s->ioc, &iov, 1, 289 NULL, NULL, 290 0, NULL); 291 } 292 293 if (msgfds_num) { 294 /* close and clean read_msgfds */ 295 for (i = 0; i < s->read_msgfds_num; i++) { 296 close(s->read_msgfds[i]); 297 } 298 299 if (s->read_msgfds_num) { 300 g_free(s->read_msgfds); 301 } 302 303 s->read_msgfds = msgfds; 304 s->read_msgfds_num = msgfds_num; 305 } 306 307 for (i = 0; i < s->read_msgfds_num; i++) { 308 int fd = s->read_msgfds[i]; 309 if (fd < 0) { 310 continue; 311 } 312 313 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */ 314 qemu_socket_set_block(fd); 315 316 #ifndef MSG_CMSG_CLOEXEC 317 qemu_set_cloexec(fd); 318 #endif 319 } 320 321 if (ret == QIO_CHANNEL_ERR_BLOCK) { 322 errno = EAGAIN; 323 ret = -1; 324 } else if (ret == -1) { 325 errno = EIO; 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 } 381 382 if (s->ioc) { 383 qio_channel_close(s->ioc, NULL); 384 } 385 object_unref(OBJECT(s->sioc)); 386 s->sioc = NULL; 387 object_unref(OBJECT(s->ioc)); 388 s->ioc = NULL; 389 g_free(chr->filename); 390 chr->filename = NULL; 391 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 392 } 393 394 static const char *qemu_chr_socket_protocol(SocketChardev *s) 395 { 396 if (s->is_telnet) { 397 return "telnet"; 398 } 399 return s->is_websock ? "websocket" : "tcp"; 400 } 401 402 static char *qemu_chr_socket_address(SocketChardev *s, const char *prefix) 403 { 404 switch (s->addr->type) { 405 case SOCKET_ADDRESS_TYPE_INET: 406 return g_strdup_printf("%s%s:%s:%s%s", prefix, 407 qemu_chr_socket_protocol(s), 408 s->addr->u.inet.host, 409 s->addr->u.inet.port, 410 s->is_listen ? ",server=on" : ""); 411 break; 412 case SOCKET_ADDRESS_TYPE_UNIX: 413 { 414 const char *tight = "", *abstract = ""; 415 UnixSocketAddress *sa = &s->addr->u.q_unix; 416 417 #ifdef CONFIG_LINUX 418 if (sa->has_abstract && sa->abstract) { 419 abstract = ",abstract=on"; 420 if (sa->has_tight && sa->tight) { 421 tight = ",tight=on"; 422 } 423 } 424 #endif 425 426 return g_strdup_printf("%sunix:%s%s%s%s", prefix, sa->path, 427 abstract, tight, 428 s->is_listen ? ",server=on" : ""); 429 break; 430 } 431 case SOCKET_ADDRESS_TYPE_FD: 432 return g_strdup_printf("%sfd:%s%s", prefix, s->addr->u.fd.str, 433 s->is_listen ? ",server=on" : ""); 434 break; 435 case SOCKET_ADDRESS_TYPE_VSOCK: 436 return g_strdup_printf("%svsock:%s:%s", prefix, 437 s->addr->u.vsock.cid, 438 s->addr->u.vsock.port); 439 default: 440 abort(); 441 } 442 } 443 444 static void update_disconnected_filename(SocketChardev *s) 445 { 446 Chardev *chr = CHARDEV(s); 447 448 g_free(chr->filename); 449 if (s->addr) { 450 chr->filename = qemu_chr_socket_address(s, "disconnected:"); 451 } else { 452 chr->filename = g_strdup("disconnected:socket"); 453 } 454 } 455 456 /* NB may be called even if tcp_chr_connect has not been 457 * reached, due to TLS or telnet initialization failure, 458 * so can *not* assume s->state == TCP_CHARDEV_STATE_CONNECTED 459 * This must be called with chr->chr_write_lock held. 460 */ 461 static void tcp_chr_disconnect_locked(Chardev *chr) 462 { 463 SocketChardev *s = SOCKET_CHARDEV(chr); 464 bool emit_close = s->state == TCP_CHARDEV_STATE_CONNECTED; 465 466 tcp_chr_free_connection(chr); 467 468 if (s->listener) { 469 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 470 chr, NULL, chr->gcontext); 471 } 472 update_disconnected_filename(s); 473 if (emit_close) { 474 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 475 } 476 if (s->reconnect_time && !s->reconnect_timer) { 477 qemu_chr_socket_restart_timer(chr); 478 } 479 } 480 481 static void tcp_chr_disconnect(Chardev *chr) 482 { 483 qemu_mutex_lock(&chr->chr_write_lock); 484 tcp_chr_disconnect_locked(chr); 485 qemu_mutex_unlock(&chr->chr_write_lock); 486 } 487 488 static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) 489 { 490 Chardev *chr = CHARDEV(opaque); 491 SocketChardev *s = SOCKET_CHARDEV(opaque); 492 uint8_t buf[CHR_READ_BUF_LEN]; 493 int len, size; 494 495 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) || 496 s->max_size <= 0) { 497 return TRUE; 498 } 499 len = sizeof(buf); 500 if (len > s->max_size) { 501 len = s->max_size; 502 } 503 size = tcp_chr_recv(chr, (void *)buf, len); 504 if (size == 0 || (size == -1 && errno != EAGAIN)) { 505 /* connection closed */ 506 tcp_chr_disconnect(chr); 507 } else if (size > 0) { 508 if (s->do_telnetopt) { 509 tcp_chr_process_IAC_bytes(chr, s, buf, &size); 510 } 511 if (size > 0) { 512 qemu_chr_be_write(chr, buf, size); 513 } 514 } 515 516 return TRUE; 517 } 518 519 static gboolean tcp_chr_hup(QIOChannel *channel, 520 GIOCondition cond, 521 void *opaque) 522 { 523 Chardev *chr = CHARDEV(opaque); 524 tcp_chr_disconnect(chr); 525 return G_SOURCE_REMOVE; 526 } 527 528 static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len) 529 { 530 SocketChardev *s = SOCKET_CHARDEV(chr); 531 int size; 532 int saved_errno; 533 534 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 535 return 0; 536 } 537 538 qio_channel_set_blocking(s->ioc, true, NULL); 539 size = tcp_chr_recv(chr, (void *) buf, len); 540 saved_errno = errno; 541 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 542 qio_channel_set_blocking(s->ioc, false, NULL); 543 } 544 if (size == 0) { 545 /* connection closed */ 546 tcp_chr_disconnect(chr); 547 } 548 549 errno = saved_errno; 550 return size; 551 } 552 553 static char *qemu_chr_compute_filename(SocketChardev *s) 554 { 555 struct sockaddr_storage *ss = &s->sioc->localAddr; 556 struct sockaddr_storage *ps = &s->sioc->remoteAddr; 557 socklen_t ss_len = s->sioc->localAddrLen; 558 socklen_t ps_len = s->sioc->remoteAddrLen; 559 char shost[NI_MAXHOST], sserv[NI_MAXSERV]; 560 char phost[NI_MAXHOST], pserv[NI_MAXSERV]; 561 const char *left = "", *right = ""; 562 563 switch (ss->ss_family) { 564 case AF_UNIX: 565 return g_strdup_printf("unix:%s%s", 566 ((struct sockaddr_un *)(ss))->sun_path, 567 s->is_listen ? ",server=on" : ""); 568 case AF_INET6: 569 left = "["; 570 right = "]"; 571 /* fall through */ 572 case AF_INET: 573 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost), 574 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV); 575 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost), 576 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV); 577 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s", 578 qemu_chr_socket_protocol(s), 579 left, shost, right, sserv, 580 s->is_listen ? ",server=on" : "", 581 left, phost, right, pserv); 582 583 default: 584 return g_strdup_printf("unknown"); 585 } 586 } 587 588 static void update_ioc_handlers(SocketChardev *s) 589 { 590 Chardev *chr = CHARDEV(s); 591 592 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 593 return; 594 } 595 596 remove_fd_in_watch(chr); 597 chr->gsource = io_add_watch_poll(chr, s->ioc, 598 tcp_chr_read_poll, 599 tcp_chr_read, chr, 600 chr->gcontext); 601 602 remove_hup_source(s); 603 s->hup_source = qio_channel_create_watch(s->ioc, G_IO_HUP); 604 /* 605 * poll() is liable to return POLLHUP even when there is 606 * still incoming data available to read on the FD. If 607 * we have the hup_source at the same priority as the 608 * main io_add_watch_poll GSource, then we might end up 609 * processing the POLLHUP event first, closing the FD, 610 * and as a result silently discard data we should have 611 * read. 612 * 613 * By setting the hup_source to G_PRIORITY_DEFAULT + 1, 614 * we ensure that io_add_watch_poll GSource will always 615 * be dispatched first, thus guaranteeing we will be 616 * able to process all incoming data before closing the 617 * FD 618 */ 619 g_source_set_priority(s->hup_source, G_PRIORITY_DEFAULT + 1); 620 g_source_set_callback(s->hup_source, (GSourceFunc)tcp_chr_hup, 621 chr, NULL); 622 g_source_attach(s->hup_source, chr->gcontext); 623 } 624 625 static void tcp_chr_connect(void *opaque) 626 { 627 Chardev *chr = CHARDEV(opaque); 628 SocketChardev *s = SOCKET_CHARDEV(opaque); 629 630 g_free(chr->filename); 631 chr->filename = qemu_chr_compute_filename(s); 632 633 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTED); 634 update_ioc_handlers(s); 635 qemu_chr_be_event(chr, CHR_EVENT_OPENED); 636 } 637 638 static void tcp_chr_telnet_destroy(SocketChardev *s) 639 { 640 if (s->telnet_source) { 641 g_source_destroy(s->telnet_source); 642 g_source_unref(s->telnet_source); 643 s->telnet_source = NULL; 644 } 645 } 646 647 static void tcp_chr_update_read_handler(Chardev *chr) 648 { 649 SocketChardev *s = SOCKET_CHARDEV(chr); 650 651 if (s->listener && s->state == TCP_CHARDEV_STATE_DISCONNECTED) { 652 /* 653 * It's possible that chardev context is changed in 654 * qemu_chr_be_update_read_handlers(). Reset it for QIO net 655 * listener if there is. 656 */ 657 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 658 chr, NULL, chr->gcontext); 659 } 660 661 if (s->telnet_source) { 662 tcp_chr_telnet_init(CHARDEV(s)); 663 } 664 665 update_ioc_handlers(s); 666 } 667 668 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, 669 GIOCondition cond G_GNUC_UNUSED, 670 gpointer user_data) 671 { 672 SocketChardev *s = user_data; 673 Chardev *chr = CHARDEV(s); 674 TCPChardevTelnetInit *init = s->telnet_init; 675 ssize_t ret; 676 677 assert(init); 678 679 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL); 680 if (ret < 0) { 681 if (ret == QIO_CHANNEL_ERR_BLOCK) { 682 ret = 0; 683 } else { 684 tcp_chr_disconnect(chr); 685 goto end; 686 } 687 } 688 init->buflen -= ret; 689 690 if (init->buflen == 0) { 691 tcp_chr_connect(chr); 692 goto end; 693 } 694 695 memmove(init->buf, init->buf + ret, init->buflen); 696 697 return G_SOURCE_CONTINUE; 698 699 end: 700 g_free(s->telnet_init); 701 s->telnet_init = NULL; 702 g_source_unref(s->telnet_source); 703 s->telnet_source = NULL; 704 return G_SOURCE_REMOVE; 705 } 706 707 static void tcp_chr_telnet_init(Chardev *chr) 708 { 709 SocketChardev *s = SOCKET_CHARDEV(chr); 710 TCPChardevTelnetInit *init; 711 size_t n = 0; 712 713 /* Destroy existing task */ 714 tcp_chr_telnet_destroy(s); 715 716 if (s->telnet_init) { 717 /* We are possibly during a handshake already */ 718 goto cont; 719 } 720 721 s->telnet_init = g_new0(TCPChardevTelnetInit, 1); 722 init = s->telnet_init; 723 724 #define IACSET(x, a, b, c) \ 725 do { \ 726 x[n++] = a; \ 727 x[n++] = b; \ 728 x[n++] = c; \ 729 } while (0) 730 731 if (!s->is_tn3270) { 732 init->buflen = 12; 733 /* Prep the telnet negotiation to put telnet in binary, 734 * no echo, single char mode */ 735 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ 736 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ 737 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ 738 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ 739 } else { 740 init->buflen = 21; 741 /* Prep the TN3270 negotiation based on RFC1576 */ 742 IACSET(init->buf, 0xff, 0xfd, 0x19); /* IAC DO EOR */ 743 IACSET(init->buf, 0xff, 0xfb, 0x19); /* IAC WILL EOR */ 744 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO BINARY */ 745 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL BINARY */ 746 IACSET(init->buf, 0xff, 0xfd, 0x18); /* IAC DO TERMINAL TYPE */ 747 IACSET(init->buf, 0xff, 0xfa, 0x18); /* IAC SB TERMINAL TYPE */ 748 IACSET(init->buf, 0x01, 0xff, 0xf0); /* SEND IAC SE */ 749 } 750 751 #undef IACSET 752 753 cont: 754 s->telnet_source = qio_channel_add_watch_source(s->ioc, G_IO_OUT, 755 tcp_chr_telnet_init_io, 756 s, NULL, 757 chr->gcontext); 758 } 759 760 761 static void tcp_chr_websock_handshake(QIOTask *task, gpointer user_data) 762 { 763 Chardev *chr = user_data; 764 SocketChardev *s = user_data; 765 Error *err = NULL; 766 767 if (qio_task_propagate_error(task, &err)) { 768 error_reportf_err(err, 769 "websock handshake of character device %s failed: ", 770 chr->label); 771 tcp_chr_disconnect(chr); 772 } else { 773 if (s->do_telnetopt) { 774 tcp_chr_telnet_init(chr); 775 } else { 776 tcp_chr_connect(chr); 777 } 778 } 779 } 780 781 782 static void tcp_chr_websock_init(Chardev *chr) 783 { 784 SocketChardev *s = SOCKET_CHARDEV(chr); 785 QIOChannelWebsock *wioc = NULL; 786 gchar *name; 787 788 wioc = qio_channel_websock_new_server(s->ioc); 789 790 name = g_strdup_printf("chardev-websocket-server-%s", chr->label); 791 qio_channel_set_name(QIO_CHANNEL(wioc), name); 792 g_free(name); 793 object_unref(OBJECT(s->ioc)); 794 s->ioc = QIO_CHANNEL(wioc); 795 796 qio_channel_websock_handshake(wioc, tcp_chr_websock_handshake, chr, NULL); 797 } 798 799 800 static void tcp_chr_tls_handshake(QIOTask *task, 801 gpointer user_data) 802 { 803 Chardev *chr = user_data; 804 SocketChardev *s = user_data; 805 Error *err = NULL; 806 807 if (qio_task_propagate_error(task, &err)) { 808 error_reportf_err(err, 809 "TLS handshake of character device %s failed: ", 810 chr->label); 811 tcp_chr_disconnect(chr); 812 } else { 813 if (s->is_websock) { 814 tcp_chr_websock_init(chr); 815 } else if (s->do_telnetopt) { 816 tcp_chr_telnet_init(chr); 817 } else { 818 tcp_chr_connect(chr); 819 } 820 } 821 } 822 823 824 static void tcp_chr_tls_init(Chardev *chr) 825 { 826 SocketChardev *s = SOCKET_CHARDEV(chr); 827 QIOChannelTLS *tioc; 828 gchar *name; 829 830 if (s->is_listen) { 831 tioc = qio_channel_tls_new_server( 832 s->ioc, s->tls_creds, 833 s->tls_authz, 834 NULL); 835 } else { 836 tioc = qio_channel_tls_new_client( 837 s->ioc, s->tls_creds, 838 s->addr->u.inet.host, 839 NULL); 840 } 841 if (tioc == NULL) { 842 tcp_chr_disconnect(chr); 843 return; 844 } 845 name = g_strdup_printf("chardev-tls-%s-%s", 846 s->is_listen ? "server" : "client", 847 chr->label); 848 qio_channel_set_name(QIO_CHANNEL(tioc), name); 849 g_free(name); 850 object_unref(OBJECT(s->ioc)); 851 s->ioc = QIO_CHANNEL(tioc); 852 853 qio_channel_tls_handshake(tioc, 854 tcp_chr_tls_handshake, 855 chr, 856 NULL, 857 chr->gcontext); 858 } 859 860 861 static void tcp_chr_set_client_ioc_name(Chardev *chr, 862 QIOChannelSocket *sioc) 863 { 864 SocketChardev *s = SOCKET_CHARDEV(chr); 865 char *name; 866 name = g_strdup_printf("chardev-tcp-%s-%s", 867 s->is_listen ? "server" : "client", 868 chr->label); 869 qio_channel_set_name(QIO_CHANNEL(sioc), name); 870 g_free(name); 871 872 } 873 874 static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc) 875 { 876 SocketChardev *s = SOCKET_CHARDEV(chr); 877 878 if (s->state != TCP_CHARDEV_STATE_CONNECTING) { 879 return -1; 880 } 881 882 s->ioc = QIO_CHANNEL(sioc); 883 object_ref(OBJECT(sioc)); 884 s->sioc = sioc; 885 object_ref(OBJECT(sioc)); 886 887 qio_channel_set_blocking(s->ioc, false, NULL); 888 889 if (s->do_nodelay) { 890 qio_channel_set_delay(s->ioc, false); 891 } 892 if (s->listener) { 893 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 894 NULL, chr->gcontext); 895 } 896 897 if (s->tls_creds) { 898 tcp_chr_tls_init(chr); 899 } else if (s->is_websock) { 900 tcp_chr_websock_init(chr); 901 } else if (s->do_telnetopt) { 902 tcp_chr_telnet_init(chr); 903 } else { 904 tcp_chr_connect(chr); 905 } 906 907 return 0; 908 } 909 910 911 static int tcp_chr_add_client(Chardev *chr, int fd) 912 { 913 int ret; 914 QIOChannelSocket *sioc; 915 SocketChardev *s = SOCKET_CHARDEV(chr); 916 917 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 918 return -1; 919 } 920 921 sioc = qio_channel_socket_new_fd(fd, NULL); 922 if (!sioc) { 923 return -1; 924 } 925 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 926 tcp_chr_set_client_ioc_name(chr, sioc); 927 if (s->registered_yank) { 928 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 929 char_socket_yank_iochannel, 930 QIO_CHANNEL(sioc)); 931 } 932 ret = tcp_chr_new_client(chr, sioc); 933 object_unref(OBJECT(sioc)); 934 return ret; 935 } 936 937 static void tcp_chr_accept(QIONetListener *listener, 938 QIOChannelSocket *cioc, 939 void *opaque) 940 { 941 Chardev *chr = CHARDEV(opaque); 942 SocketChardev *s = SOCKET_CHARDEV(chr); 943 944 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 945 tcp_chr_set_client_ioc_name(chr, cioc); 946 if (s->registered_yank) { 947 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 948 char_socket_yank_iochannel, 949 QIO_CHANNEL(cioc)); 950 } 951 tcp_chr_new_client(chr, cioc); 952 } 953 954 955 static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp) 956 { 957 SocketChardev *s = SOCKET_CHARDEV(chr); 958 QIOChannelSocket *sioc = qio_channel_socket_new(); 959 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 960 tcp_chr_set_client_ioc_name(chr, sioc); 961 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) { 962 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 963 object_unref(OBJECT(sioc)); 964 return -1; 965 } 966 if (s->registered_yank) { 967 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 968 char_socket_yank_iochannel, 969 QIO_CHANNEL(sioc)); 970 } 971 tcp_chr_new_client(chr, sioc); 972 object_unref(OBJECT(sioc)); 973 return 0; 974 } 975 976 977 static void tcp_chr_accept_server_sync(Chardev *chr) 978 { 979 SocketChardev *s = SOCKET_CHARDEV(chr); 980 QIOChannelSocket *sioc; 981 info_report("QEMU waiting for connection on: %s", 982 chr->filename); 983 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 984 sioc = qio_net_listener_wait_client(s->listener); 985 tcp_chr_set_client_ioc_name(chr, sioc); 986 if (s->registered_yank) { 987 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 988 char_socket_yank_iochannel, 989 QIO_CHANNEL(sioc)); 990 } 991 tcp_chr_new_client(chr, sioc); 992 object_unref(OBJECT(sioc)); 993 } 994 995 996 static int tcp_chr_wait_connected(Chardev *chr, Error **errp) 997 { 998 SocketChardev *s = SOCKET_CHARDEV(chr); 999 const char *opts[] = { "telnet", "tn3270", "websock", "tls-creds" }; 1000 bool optset[] = { s->is_telnet, s->is_tn3270, s->is_websock, s->tls_creds }; 1001 size_t i; 1002 1003 QEMU_BUILD_BUG_ON(G_N_ELEMENTS(opts) != G_N_ELEMENTS(optset)); 1004 for (i = 0; i < G_N_ELEMENTS(opts); i++) { 1005 if (optset[i]) { 1006 error_setg(errp, 1007 "'%s' option is incompatible with waiting for " 1008 "connection completion", opts[i]); 1009 return -1; 1010 } 1011 } 1012 1013 tcp_chr_reconn_timer_cancel(s); 1014 1015 /* 1016 * We expect states to be as follows: 1017 * 1018 * - server 1019 * - wait -> CONNECTED 1020 * - nowait -> DISCONNECTED 1021 * - client 1022 * - reconnect == 0 -> CONNECTED 1023 * - reconnect != 0 -> CONNECTING 1024 * 1025 */ 1026 if (s->state == TCP_CHARDEV_STATE_CONNECTING) { 1027 if (!s->connect_task) { 1028 error_setg(errp, 1029 "Unexpected 'connecting' state without connect task " 1030 "while waiting for connection completion"); 1031 return -1; 1032 } 1033 /* 1034 * tcp_chr_wait_connected should only ever be run from the 1035 * main loop thread associated with chr->gcontext, otherwise 1036 * qio_task_wait_thread has a dangerous race condition with 1037 * free'ing of the s->connect_task object. 1038 * 1039 * Acquiring the main context doesn't 100% prove we're in 1040 * the main loop thread, but it does at least guarantee 1041 * that the main loop won't be executed by another thread 1042 * avoiding the race condition with the task idle callback. 1043 */ 1044 g_main_context_acquire(chr->gcontext); 1045 qio_task_wait_thread(s->connect_task); 1046 g_main_context_release(chr->gcontext); 1047 1048 /* 1049 * The completion callback (qemu_chr_socket_connected) for 1050 * s->connect_task should have set this to NULL by the time 1051 * qio_task_wait_thread has returned. 1052 */ 1053 assert(!s->connect_task); 1054 1055 /* 1056 * NB we are *not* guaranteed to have "s->state == ..CONNECTED" 1057 * at this point as this first connect may be failed, so 1058 * allow the next loop to run regardless. 1059 */ 1060 } 1061 1062 while (s->state != TCP_CHARDEV_STATE_CONNECTED) { 1063 if (s->is_listen) { 1064 tcp_chr_accept_server_sync(chr); 1065 } else { 1066 Error *err = NULL; 1067 if (tcp_chr_connect_client_sync(chr, &err) < 0) { 1068 if (s->reconnect_time) { 1069 error_free(err); 1070 g_usleep(s->reconnect_time * 1000ULL * 1000ULL); 1071 } else { 1072 error_propagate(errp, err); 1073 return -1; 1074 } 1075 } 1076 } 1077 } 1078 1079 return 0; 1080 } 1081 1082 static void char_socket_finalize(Object *obj) 1083 { 1084 Chardev *chr = CHARDEV(obj); 1085 SocketChardev *s = SOCKET_CHARDEV(obj); 1086 1087 tcp_chr_free_connection(chr); 1088 tcp_chr_reconn_timer_cancel(s); 1089 qapi_free_SocketAddress(s->addr); 1090 tcp_chr_telnet_destroy(s); 1091 g_free(s->telnet_init); 1092 if (s->listener) { 1093 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 1094 NULL, chr->gcontext); 1095 object_unref(OBJECT(s->listener)); 1096 s->listener = NULL; 1097 } 1098 if (s->tls_creds) { 1099 object_unref(OBJECT(s->tls_creds)); 1100 } 1101 g_free(s->tls_authz); 1102 if (s->registered_yank) { 1103 /* 1104 * In the chardev-change special-case, we shouldn't unregister the yank 1105 * instance, as it still may be needed. 1106 */ 1107 if (!chr->handover_yank_instance) { 1108 yank_unregister_instance(CHARDEV_YANK_INSTANCE(chr->label)); 1109 } 1110 } 1111 1112 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 1113 } 1114 1115 static void qemu_chr_socket_connected(QIOTask *task, void *opaque) 1116 { 1117 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1118 Chardev *chr = CHARDEV(opaque); 1119 SocketChardev *s = SOCKET_CHARDEV(chr); 1120 Error *err = NULL; 1121 1122 s->connect_task = NULL; 1123 1124 if (qio_task_propagate_error(task, &err)) { 1125 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 1126 if (s->registered_yank) { 1127 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 1128 char_socket_yank_iochannel, 1129 QIO_CHANNEL(sioc)); 1130 } 1131 check_report_connect_error(chr, err); 1132 goto cleanup; 1133 } 1134 1135 s->connect_err_reported = false; 1136 tcp_chr_new_client(chr, sioc); 1137 1138 cleanup: 1139 object_unref(OBJECT(sioc)); 1140 } 1141 1142 1143 static void tcp_chr_connect_client_task(QIOTask *task, 1144 gpointer opaque) 1145 { 1146 QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1147 SocketAddress *addr = opaque; 1148 Error *err = NULL; 1149 1150 qio_channel_socket_connect_sync(ioc, addr, &err); 1151 1152 qio_task_set_error(task, err); 1153 } 1154 1155 1156 static void tcp_chr_connect_client_async(Chardev *chr) 1157 { 1158 SocketChardev *s = SOCKET_CHARDEV(chr); 1159 QIOChannelSocket *sioc; 1160 1161 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 1162 sioc = qio_channel_socket_new(); 1163 tcp_chr_set_client_ioc_name(chr, sioc); 1164 if (s->registered_yank) { 1165 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 1166 char_socket_yank_iochannel, 1167 QIO_CHANNEL(sioc)); 1168 } 1169 /* 1170 * Normally code would use the qio_channel_socket_connect_async 1171 * method which uses a QIOTask + qio_task_set_error internally 1172 * to avoid blocking. The tcp_chr_wait_connected method, however, 1173 * needs a way to synchronize with completion of the background 1174 * connect task which can't be done with the QIOChannelSocket 1175 * async APIs. Thus we must use QIOTask directly to implement 1176 * the non-blocking concept locally. 1177 */ 1178 s->connect_task = qio_task_new(OBJECT(sioc), 1179 qemu_chr_socket_connected, 1180 object_ref(OBJECT(chr)), 1181 (GDestroyNotify)object_unref); 1182 qio_task_run_in_thread(s->connect_task, 1183 tcp_chr_connect_client_task, 1184 s->addr, 1185 NULL, 1186 chr->gcontext); 1187 } 1188 1189 static gboolean socket_reconnect_timeout(gpointer opaque) 1190 { 1191 Chardev *chr = CHARDEV(opaque); 1192 SocketChardev *s = SOCKET_CHARDEV(opaque); 1193 1194 qemu_mutex_lock(&chr->chr_write_lock); 1195 g_source_unref(s->reconnect_timer); 1196 s->reconnect_timer = NULL; 1197 qemu_mutex_unlock(&chr->chr_write_lock); 1198 1199 if (chr->be_open) { 1200 return false; 1201 } 1202 1203 tcp_chr_connect_client_async(chr); 1204 1205 return false; 1206 } 1207 1208 1209 static int qmp_chardev_open_socket_server(Chardev *chr, 1210 bool is_telnet, 1211 bool is_waitconnect, 1212 Error **errp) 1213 { 1214 SocketChardev *s = SOCKET_CHARDEV(chr); 1215 char *name; 1216 if (is_telnet) { 1217 s->do_telnetopt = 1; 1218 } 1219 s->listener = qio_net_listener_new(); 1220 1221 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label); 1222 qio_net_listener_set_name(s->listener, name); 1223 g_free(name); 1224 1225 if (s->addr->type == SOCKET_ADDRESS_TYPE_FD && !*s->addr->u.fd.str) { 1226 goto skip_listen; 1227 } 1228 1229 if (qio_net_listener_open_sync(s->listener, s->addr, 1, errp) < 0) { 1230 object_unref(OBJECT(s->listener)); 1231 s->listener = NULL; 1232 return -1; 1233 } 1234 1235 qapi_free_SocketAddress(s->addr); 1236 s->addr = socket_local_address(s->listener->sioc[0]->fd, errp); 1237 1238 skip_listen: 1239 update_disconnected_filename(s); 1240 1241 if (is_waitconnect) { 1242 tcp_chr_accept_server_sync(chr); 1243 } else { 1244 qio_net_listener_set_client_func_full(s->listener, 1245 tcp_chr_accept, 1246 chr, NULL, 1247 chr->gcontext); 1248 } 1249 1250 return 0; 1251 } 1252 1253 1254 static int qmp_chardev_open_socket_client(Chardev *chr, 1255 int64_t reconnect, 1256 Error **errp) 1257 { 1258 SocketChardev *s = SOCKET_CHARDEV(chr); 1259 1260 if (reconnect > 0) { 1261 s->reconnect_time = reconnect; 1262 tcp_chr_connect_client_async(chr); 1263 return 0; 1264 } else { 1265 return tcp_chr_connect_client_sync(chr, errp); 1266 } 1267 } 1268 1269 1270 static bool qmp_chardev_validate_socket(ChardevSocket *sock, 1271 SocketAddress *addr, 1272 Error **errp) 1273 { 1274 /* Validate any options which have a dependency on address type */ 1275 switch (addr->type) { 1276 case SOCKET_ADDRESS_TYPE_FD: 1277 if (sock->has_reconnect) { 1278 error_setg(errp, 1279 "'reconnect' option is incompatible with " 1280 "'fd' address type"); 1281 return false; 1282 } 1283 if (sock->tls_creds && 1284 !(sock->has_server && sock->server)) { 1285 error_setg(errp, 1286 "'tls_creds' option is incompatible with " 1287 "'fd' address type as client"); 1288 return false; 1289 } 1290 break; 1291 1292 case SOCKET_ADDRESS_TYPE_UNIX: 1293 if (sock->tls_creds) { 1294 error_setg(errp, 1295 "'tls_creds' option is incompatible with " 1296 "'unix' address type"); 1297 return false; 1298 } 1299 break; 1300 1301 case SOCKET_ADDRESS_TYPE_INET: 1302 break; 1303 1304 case SOCKET_ADDRESS_TYPE_VSOCK: 1305 if (sock->tls_creds) { 1306 error_setg(errp, 1307 "'tls_creds' option is incompatible with " 1308 "'vsock' address type"); 1309 return false; 1310 } 1311 1312 default: 1313 break; 1314 } 1315 1316 if (sock->tls_authz && !sock->tls_creds) { 1317 error_setg(errp, "'tls_authz' option requires 'tls_creds' option"); 1318 return false; 1319 } 1320 1321 /* Validate any options which have a dependency on client vs server */ 1322 if (!sock->has_server || sock->server) { 1323 if (sock->has_reconnect) { 1324 error_setg(errp, 1325 "'reconnect' option is incompatible with " 1326 "socket in server listen mode"); 1327 return false; 1328 } 1329 } else { 1330 if (sock->has_websocket && sock->websocket) { 1331 error_setg(errp, "%s", "Websocket client is not implemented"); 1332 return false; 1333 } 1334 if (sock->has_wait) { 1335 error_setg(errp, "%s", 1336 "'wait' option is incompatible with " 1337 "socket in client connect mode"); 1338 return false; 1339 } 1340 } 1341 1342 return true; 1343 } 1344 1345 1346 static void qmp_chardev_open_socket(Chardev *chr, 1347 ChardevBackend *backend, 1348 bool *be_opened, 1349 Error **errp) 1350 { 1351 SocketChardev *s = SOCKET_CHARDEV(chr); 1352 ChardevSocket *sock = backend->u.socket.data; 1353 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false; 1354 bool is_listen = sock->has_server ? sock->server : true; 1355 bool is_telnet = sock->has_telnet ? sock->telnet : false; 1356 bool is_tn3270 = sock->has_tn3270 ? sock->tn3270 : false; 1357 bool is_waitconnect = sock->has_wait ? sock->wait : false; 1358 bool is_websock = sock->has_websocket ? sock->websocket : false; 1359 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; 1360 SocketAddress *addr; 1361 1362 s->is_listen = is_listen; 1363 s->is_telnet = is_telnet; 1364 s->is_tn3270 = is_tn3270; 1365 s->is_websock = is_websock; 1366 s->do_nodelay = do_nodelay; 1367 if (sock->tls_creds) { 1368 Object *creds; 1369 creds = object_resolve_path_component( 1370 object_get_objects_root(), sock->tls_creds); 1371 if (!creds) { 1372 error_setg(errp, "No TLS credentials with id '%s'", 1373 sock->tls_creds); 1374 return; 1375 } 1376 s->tls_creds = (QCryptoTLSCreds *) 1377 object_dynamic_cast(creds, 1378 TYPE_QCRYPTO_TLS_CREDS); 1379 if (!s->tls_creds) { 1380 error_setg(errp, "Object with id '%s' is not TLS credentials", 1381 sock->tls_creds); 1382 return; 1383 } 1384 object_ref(OBJECT(s->tls_creds)); 1385 if (!qcrypto_tls_creds_check_endpoint(s->tls_creds, 1386 is_listen 1387 ? QCRYPTO_TLS_CREDS_ENDPOINT_SERVER 1388 : QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT, 1389 errp)) { 1390 return; 1391 } 1392 } 1393 s->tls_authz = g_strdup(sock->tls_authz); 1394 1395 s->addr = addr = socket_address_flatten(sock->addr); 1396 1397 if (!qmp_chardev_validate_socket(sock, addr, errp)) { 1398 return; 1399 } 1400 1401 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); 1402 #ifndef _WIN32 1403 /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */ 1404 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) { 1405 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); 1406 } 1407 #endif 1408 1409 /* 1410 * In the chardev-change special-case, we shouldn't register a new yank 1411 * instance, as there already may be one. 1412 */ 1413 if (!chr->handover_yank_instance) { 1414 if (!yank_register_instance(CHARDEV_YANK_INSTANCE(chr->label), errp)) { 1415 return; 1416 } 1417 } 1418 s->registered_yank = true; 1419 1420 /* be isn't opened until we get a connection */ 1421 *be_opened = false; 1422 1423 update_disconnected_filename(s); 1424 1425 if (s->is_listen) { 1426 if (qmp_chardev_open_socket_server(chr, is_telnet || is_tn3270, 1427 is_waitconnect, errp) < 0) { 1428 return; 1429 } 1430 } else { 1431 if (qmp_chardev_open_socket_client(chr, reconnect, errp) < 0) { 1432 return; 1433 } 1434 } 1435 } 1436 1437 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend, 1438 Error **errp) 1439 { 1440 const char *path = qemu_opt_get(opts, "path"); 1441 const char *host = qemu_opt_get(opts, "host"); 1442 const char *port = qemu_opt_get(opts, "port"); 1443 const char *fd = qemu_opt_get(opts, "fd"); 1444 #ifdef CONFIG_LINUX 1445 bool tight = qemu_opt_get_bool(opts, "tight", true); 1446 bool abstract = qemu_opt_get_bool(opts, "abstract", false); 1447 #endif 1448 SocketAddressLegacy *addr; 1449 ChardevSocket *sock; 1450 1451 if ((!!path + !!fd + !!host) > 1) { 1452 error_setg(errp, 1453 "None or one of 'path', 'fd' or 'host' option required."); 1454 return; 1455 } 1456 1457 if (host && !port) { 1458 error_setg(errp, "chardev: socket: no port given"); 1459 return; 1460 } 1461 1462 backend->type = CHARDEV_BACKEND_KIND_SOCKET; 1463 sock = backend->u.socket.data = g_new0(ChardevSocket, 1); 1464 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock)); 1465 1466 if (qemu_opt_get(opts, "delay") && qemu_opt_get(opts, "nodelay")) { 1467 error_setg(errp, "'delay' and 'nodelay' are mutually exclusive"); 1468 return; 1469 } 1470 sock->has_nodelay = 1471 qemu_opt_get(opts, "delay") || 1472 qemu_opt_get(opts, "nodelay"); 1473 sock->nodelay = 1474 !qemu_opt_get_bool(opts, "delay", true) || 1475 qemu_opt_get_bool(opts, "nodelay", false); 1476 1477 /* 1478 * We have different default to QMP for 'server', hence 1479 * we can't just check for existence of 'server' 1480 */ 1481 sock->has_server = true; 1482 sock->server = qemu_opt_get_bool(opts, "server", false); 1483 sock->has_telnet = qemu_opt_get(opts, "telnet"); 1484 sock->telnet = qemu_opt_get_bool(opts, "telnet", false); 1485 sock->has_tn3270 = qemu_opt_get(opts, "tn3270"); 1486 sock->tn3270 = qemu_opt_get_bool(opts, "tn3270", false); 1487 sock->has_websocket = qemu_opt_get(opts, "websocket"); 1488 sock->websocket = qemu_opt_get_bool(opts, "websocket", false); 1489 /* 1490 * We have different default to QMP for 'wait' when 'server' 1491 * is set, hence we can't just check for existence of 'wait' 1492 */ 1493 sock->has_wait = qemu_opt_find(opts, "wait") || sock->server; 1494 sock->wait = qemu_opt_get_bool(opts, "wait", true); 1495 sock->has_reconnect = qemu_opt_find(opts, "reconnect"); 1496 sock->reconnect = qemu_opt_get_number(opts, "reconnect", 0); 1497 sock->tls_creds = g_strdup(qemu_opt_get(opts, "tls-creds")); 1498 sock->tls_authz = g_strdup(qemu_opt_get(opts, "tls-authz")); 1499 1500 addr = g_new0(SocketAddressLegacy, 1); 1501 if (path) { 1502 UnixSocketAddress *q_unix; 1503 addr->type = SOCKET_ADDRESS_TYPE_UNIX; 1504 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 1505 q_unix->path = g_strdup(path); 1506 #ifdef CONFIG_LINUX 1507 q_unix->has_tight = true; 1508 q_unix->tight = tight; 1509 q_unix->has_abstract = true; 1510 q_unix->abstract = abstract; 1511 #endif 1512 } else if (host) { 1513 addr->type = SOCKET_ADDRESS_TYPE_INET; 1514 addr->u.inet.data = g_new(InetSocketAddress, 1); 1515 *addr->u.inet.data = (InetSocketAddress) { 1516 .host = g_strdup(host), 1517 .port = g_strdup(port), 1518 .has_to = qemu_opt_get(opts, "to"), 1519 .to = qemu_opt_get_number(opts, "to", 0), 1520 .has_ipv4 = qemu_opt_get(opts, "ipv4"), 1521 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), 1522 .has_ipv6 = qemu_opt_get(opts, "ipv6"), 1523 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), 1524 }; 1525 } else { 1526 addr->type = SOCKET_ADDRESS_TYPE_FD; 1527 addr->u.fd.data = g_new(FdSocketAddress, 1); 1528 addr->u.fd.data->str = g_strdup(fd); 1529 } 1530 sock->addr = addr; 1531 } 1532 1533 static void 1534 char_socket_get_addr(Object *obj, Visitor *v, const char *name, 1535 void *opaque, Error **errp) 1536 { 1537 SocketChardev *s = SOCKET_CHARDEV(obj); 1538 1539 visit_type_SocketAddress(v, name, &s->addr, errp); 1540 } 1541 1542 static bool 1543 char_socket_get_connected(Object *obj, Error **errp) 1544 { 1545 SocketChardev *s = SOCKET_CHARDEV(obj); 1546 1547 return s->state == TCP_CHARDEV_STATE_CONNECTED; 1548 } 1549 1550 static void char_socket_class_init(ObjectClass *oc, void *data) 1551 { 1552 ChardevClass *cc = CHARDEV_CLASS(oc); 1553 1554 cc->supports_yank = true; 1555 1556 cc->parse = qemu_chr_parse_socket; 1557 cc->open = qmp_chardev_open_socket; 1558 cc->chr_wait_connected = tcp_chr_wait_connected; 1559 cc->chr_write = tcp_chr_write; 1560 cc->chr_sync_read = tcp_chr_sync_read; 1561 cc->chr_disconnect = tcp_chr_disconnect; 1562 cc->get_msgfds = tcp_get_msgfds; 1563 cc->set_msgfds = tcp_set_msgfds; 1564 cc->chr_add_client = tcp_chr_add_client; 1565 cc->chr_add_watch = tcp_chr_add_watch; 1566 cc->chr_update_read_handler = tcp_chr_update_read_handler; 1567 1568 object_class_property_add(oc, "addr", "SocketAddress", 1569 char_socket_get_addr, NULL, 1570 NULL, NULL); 1571 1572 object_class_property_add_bool(oc, "connected", char_socket_get_connected, 1573 NULL); 1574 } 1575 1576 static const TypeInfo char_socket_type_info = { 1577 .name = TYPE_CHARDEV_SOCKET, 1578 .parent = TYPE_CHARDEV, 1579 .instance_size = sizeof(SocketChardev), 1580 .instance_finalize = char_socket_finalize, 1581 .class_init = char_socket_class_init, 1582 }; 1583 1584 static void register_types(void) 1585 { 1586 type_register_static(&char_socket_type_info); 1587 } 1588 1589 type_init(register_types); 1590