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); 1560