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