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 #ifndef _WIN32 561 case AF_UNIX: 562 return g_strdup_printf("unix:%s%s", 563 ((struct sockaddr_un *)(ss))->sun_path, 564 s->is_listen ? ",server=on" : ""); 565 #endif 566 case AF_INET6: 567 left = "["; 568 right = "]"; 569 /* fall through */ 570 case AF_INET: 571 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost), 572 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV); 573 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost), 574 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV); 575 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s", 576 qemu_chr_socket_protocol(s), 577 left, shost, right, sserv, 578 s->is_listen ? ",server=on" : "", 579 left, phost, right, pserv); 580 581 default: 582 return g_strdup_printf("unknown"); 583 } 584 } 585 586 static void update_ioc_handlers(SocketChardev *s) 587 { 588 Chardev *chr = CHARDEV(s); 589 590 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 591 return; 592 } 593 594 remove_fd_in_watch(chr); 595 chr->gsource = io_add_watch_poll(chr, s->ioc, 596 tcp_chr_read_poll, 597 tcp_chr_read, chr, 598 chr->gcontext); 599 600 remove_hup_source(s); 601 s->hup_source = qio_channel_create_watch(s->ioc, G_IO_HUP); 602 g_source_set_callback(s->hup_source, (GSourceFunc)tcp_chr_hup, 603 chr, NULL); 604 g_source_attach(s->hup_source, chr->gcontext); 605 } 606 607 static void tcp_chr_connect(void *opaque) 608 { 609 Chardev *chr = CHARDEV(opaque); 610 SocketChardev *s = SOCKET_CHARDEV(opaque); 611 612 g_free(chr->filename); 613 chr->filename = qemu_chr_compute_filename(s); 614 615 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTED); 616 update_ioc_handlers(s); 617 qemu_chr_be_event(chr, CHR_EVENT_OPENED); 618 } 619 620 static void tcp_chr_telnet_destroy(SocketChardev *s) 621 { 622 if (s->telnet_source) { 623 g_source_destroy(s->telnet_source); 624 g_source_unref(s->telnet_source); 625 s->telnet_source = NULL; 626 } 627 } 628 629 static void tcp_chr_update_read_handler(Chardev *chr) 630 { 631 SocketChardev *s = SOCKET_CHARDEV(chr); 632 633 if (s->listener && s->state == TCP_CHARDEV_STATE_DISCONNECTED) { 634 /* 635 * It's possible that chardev context is changed in 636 * qemu_chr_be_update_read_handlers(). Reset it for QIO net 637 * listener if there is. 638 */ 639 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 640 chr, NULL, chr->gcontext); 641 } 642 643 if (s->telnet_source) { 644 tcp_chr_telnet_init(CHARDEV(s)); 645 } 646 647 update_ioc_handlers(s); 648 } 649 650 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, 651 GIOCondition cond G_GNUC_UNUSED, 652 gpointer user_data) 653 { 654 SocketChardev *s = user_data; 655 Chardev *chr = CHARDEV(s); 656 TCPChardevTelnetInit *init = s->telnet_init; 657 ssize_t ret; 658 659 assert(init); 660 661 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL); 662 if (ret < 0) { 663 if (ret == QIO_CHANNEL_ERR_BLOCK) { 664 ret = 0; 665 } else { 666 tcp_chr_disconnect(chr); 667 goto end; 668 } 669 } 670 init->buflen -= ret; 671 672 if (init->buflen == 0) { 673 tcp_chr_connect(chr); 674 goto end; 675 } 676 677 memmove(init->buf, init->buf + ret, init->buflen); 678 679 return G_SOURCE_CONTINUE; 680 681 end: 682 g_free(s->telnet_init); 683 s->telnet_init = NULL; 684 g_source_unref(s->telnet_source); 685 s->telnet_source = NULL; 686 return G_SOURCE_REMOVE; 687 } 688 689 static void tcp_chr_telnet_init(Chardev *chr) 690 { 691 SocketChardev *s = SOCKET_CHARDEV(chr); 692 TCPChardevTelnetInit *init; 693 size_t n = 0; 694 695 /* Destroy existing task */ 696 tcp_chr_telnet_destroy(s); 697 698 if (s->telnet_init) { 699 /* We are possibly during a handshake already */ 700 goto cont; 701 } 702 703 s->telnet_init = g_new0(TCPChardevTelnetInit, 1); 704 init = s->telnet_init; 705 706 #define IACSET(x, a, b, c) \ 707 do { \ 708 x[n++] = a; \ 709 x[n++] = b; \ 710 x[n++] = c; \ 711 } while (0) 712 713 if (!s->is_tn3270) { 714 init->buflen = 12; 715 /* Prep the telnet negotion to put telnet in binary, 716 * no echo, single char mode */ 717 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ 718 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ 719 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ 720 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ 721 } else { 722 init->buflen = 21; 723 /* Prep the TN3270 negotion based on RFC1576 */ 724 IACSET(init->buf, 0xff, 0xfd, 0x19); /* IAC DO EOR */ 725 IACSET(init->buf, 0xff, 0xfb, 0x19); /* IAC WILL EOR */ 726 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO BINARY */ 727 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL BINARY */ 728 IACSET(init->buf, 0xff, 0xfd, 0x18); /* IAC DO TERMINAL TYPE */ 729 IACSET(init->buf, 0xff, 0xfa, 0x18); /* IAC SB TERMINAL TYPE */ 730 IACSET(init->buf, 0x01, 0xff, 0xf0); /* SEND IAC SE */ 731 } 732 733 #undef IACSET 734 735 cont: 736 s->telnet_source = qio_channel_add_watch_source(s->ioc, G_IO_OUT, 737 tcp_chr_telnet_init_io, 738 s, NULL, 739 chr->gcontext); 740 } 741 742 743 static void tcp_chr_websock_handshake(QIOTask *task, gpointer user_data) 744 { 745 Chardev *chr = user_data; 746 SocketChardev *s = user_data; 747 748 if (qio_task_propagate_error(task, NULL)) { 749 tcp_chr_disconnect(chr); 750 } else { 751 if (s->do_telnetopt) { 752 tcp_chr_telnet_init(chr); 753 } else { 754 tcp_chr_connect(chr); 755 } 756 } 757 } 758 759 760 static void tcp_chr_websock_init(Chardev *chr) 761 { 762 SocketChardev *s = SOCKET_CHARDEV(chr); 763 QIOChannelWebsock *wioc = NULL; 764 gchar *name; 765 766 wioc = qio_channel_websock_new_server(s->ioc); 767 768 name = g_strdup_printf("chardev-websocket-server-%s", chr->label); 769 qio_channel_set_name(QIO_CHANNEL(wioc), name); 770 g_free(name); 771 object_unref(OBJECT(s->ioc)); 772 s->ioc = QIO_CHANNEL(wioc); 773 774 qio_channel_websock_handshake(wioc, tcp_chr_websock_handshake, chr, NULL); 775 } 776 777 778 static void tcp_chr_tls_handshake(QIOTask *task, 779 gpointer user_data) 780 { 781 Chardev *chr = user_data; 782 SocketChardev *s = user_data; 783 784 if (qio_task_propagate_error(task, NULL)) { 785 tcp_chr_disconnect(chr); 786 } else { 787 if (s->is_websock) { 788 tcp_chr_websock_init(chr); 789 } else if (s->do_telnetopt) { 790 tcp_chr_telnet_init(chr); 791 } else { 792 tcp_chr_connect(chr); 793 } 794 } 795 } 796 797 798 static void tcp_chr_tls_init(Chardev *chr) 799 { 800 SocketChardev *s = SOCKET_CHARDEV(chr); 801 QIOChannelTLS *tioc; 802 gchar *name; 803 804 if (s->is_listen) { 805 tioc = qio_channel_tls_new_server( 806 s->ioc, s->tls_creds, 807 s->tls_authz, 808 NULL); 809 } else { 810 tioc = qio_channel_tls_new_client( 811 s->ioc, s->tls_creds, 812 s->addr->u.inet.host, 813 NULL); 814 } 815 if (tioc == NULL) { 816 tcp_chr_disconnect(chr); 817 return; 818 } 819 name = g_strdup_printf("chardev-tls-%s-%s", 820 s->is_listen ? "server" : "client", 821 chr->label); 822 qio_channel_set_name(QIO_CHANNEL(tioc), name); 823 g_free(name); 824 object_unref(OBJECT(s->ioc)); 825 s->ioc = QIO_CHANNEL(tioc); 826 827 qio_channel_tls_handshake(tioc, 828 tcp_chr_tls_handshake, 829 chr, 830 NULL, 831 chr->gcontext); 832 } 833 834 835 static void tcp_chr_set_client_ioc_name(Chardev *chr, 836 QIOChannelSocket *sioc) 837 { 838 SocketChardev *s = SOCKET_CHARDEV(chr); 839 char *name; 840 name = g_strdup_printf("chardev-tcp-%s-%s", 841 s->is_listen ? "server" : "client", 842 chr->label); 843 qio_channel_set_name(QIO_CHANNEL(sioc), name); 844 g_free(name); 845 846 } 847 848 static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc) 849 { 850 SocketChardev *s = SOCKET_CHARDEV(chr); 851 852 if (s->state != TCP_CHARDEV_STATE_CONNECTING) { 853 return -1; 854 } 855 856 s->ioc = QIO_CHANNEL(sioc); 857 object_ref(OBJECT(sioc)); 858 s->sioc = sioc; 859 object_ref(OBJECT(sioc)); 860 861 qio_channel_set_blocking(s->ioc, false, NULL); 862 863 if (s->do_nodelay) { 864 qio_channel_set_delay(s->ioc, false); 865 } 866 if (s->listener) { 867 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 868 NULL, chr->gcontext); 869 } 870 871 if (s->tls_creds) { 872 tcp_chr_tls_init(chr); 873 } else if (s->is_websock) { 874 tcp_chr_websock_init(chr); 875 } else if (s->do_telnetopt) { 876 tcp_chr_telnet_init(chr); 877 } else { 878 tcp_chr_connect(chr); 879 } 880 881 return 0; 882 } 883 884 885 static int tcp_chr_add_client(Chardev *chr, int fd) 886 { 887 int ret; 888 QIOChannelSocket *sioc; 889 SocketChardev *s = SOCKET_CHARDEV(chr); 890 891 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 892 return -1; 893 } 894 895 sioc = qio_channel_socket_new_fd(fd, NULL); 896 if (!sioc) { 897 return -1; 898 } 899 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 900 tcp_chr_set_client_ioc_name(chr, sioc); 901 if (s->registered_yank) { 902 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 903 char_socket_yank_iochannel, 904 QIO_CHANNEL(sioc)); 905 } 906 ret = tcp_chr_new_client(chr, sioc); 907 object_unref(OBJECT(sioc)); 908 return ret; 909 } 910 911 static void tcp_chr_accept(QIONetListener *listener, 912 QIOChannelSocket *cioc, 913 void *opaque) 914 { 915 Chardev *chr = CHARDEV(opaque); 916 SocketChardev *s = SOCKET_CHARDEV(chr); 917 918 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 919 tcp_chr_set_client_ioc_name(chr, cioc); 920 if (s->registered_yank) { 921 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 922 char_socket_yank_iochannel, 923 QIO_CHANNEL(cioc)); 924 } 925 tcp_chr_new_client(chr, cioc); 926 } 927 928 929 static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp) 930 { 931 SocketChardev *s = SOCKET_CHARDEV(chr); 932 QIOChannelSocket *sioc = qio_channel_socket_new(); 933 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 934 tcp_chr_set_client_ioc_name(chr, sioc); 935 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) { 936 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 937 object_unref(OBJECT(sioc)); 938 return -1; 939 } 940 if (s->registered_yank) { 941 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 942 char_socket_yank_iochannel, 943 QIO_CHANNEL(sioc)); 944 } 945 tcp_chr_new_client(chr, sioc); 946 object_unref(OBJECT(sioc)); 947 return 0; 948 } 949 950 951 static void tcp_chr_accept_server_sync(Chardev *chr) 952 { 953 SocketChardev *s = SOCKET_CHARDEV(chr); 954 QIOChannelSocket *sioc; 955 info_report("QEMU waiting for connection on: %s", 956 chr->filename); 957 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 958 sioc = qio_net_listener_wait_client(s->listener); 959 tcp_chr_set_client_ioc_name(chr, sioc); 960 if (s->registered_yank) { 961 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 962 char_socket_yank_iochannel, 963 QIO_CHANNEL(sioc)); 964 } 965 tcp_chr_new_client(chr, sioc); 966 object_unref(OBJECT(sioc)); 967 } 968 969 970 static int tcp_chr_wait_connected(Chardev *chr, Error **errp) 971 { 972 SocketChardev *s = SOCKET_CHARDEV(chr); 973 const char *opts[] = { "telnet", "tn3270", "websock", "tls-creds" }; 974 bool optset[] = { s->is_telnet, s->is_tn3270, s->is_websock, s->tls_creds }; 975 size_t i; 976 977 QEMU_BUILD_BUG_ON(G_N_ELEMENTS(opts) != G_N_ELEMENTS(optset)); 978 for (i = 0; i < G_N_ELEMENTS(opts); i++) { 979 if (optset[i]) { 980 error_setg(errp, 981 "'%s' option is incompatible with waiting for " 982 "connection completion", opts[i]); 983 return -1; 984 } 985 } 986 987 tcp_chr_reconn_timer_cancel(s); 988 989 /* 990 * We expect states to be as follows: 991 * 992 * - server 993 * - wait -> CONNECTED 994 * - nowait -> DISCONNECTED 995 * - client 996 * - reconnect == 0 -> CONNECTED 997 * - reconnect != 0 -> CONNECTING 998 * 999 */ 1000 if (s->state == TCP_CHARDEV_STATE_CONNECTING) { 1001 if (!s->connect_task) { 1002 error_setg(errp, 1003 "Unexpected 'connecting' state without connect task " 1004 "while waiting for connection completion"); 1005 return -1; 1006 } 1007 /* 1008 * tcp_chr_wait_connected should only ever be run from the 1009 * main loop thread associated with chr->gcontext, otherwise 1010 * qio_task_wait_thread has a dangerous race condition with 1011 * free'ing of the s->connect_task object. 1012 * 1013 * Acquiring the main context doesn't 100% prove we're in 1014 * the main loop thread, but it does at least guarantee 1015 * that the main loop won't be executed by another thread 1016 * avoiding the race condition with the task idle callback. 1017 */ 1018 g_main_context_acquire(chr->gcontext); 1019 qio_task_wait_thread(s->connect_task); 1020 g_main_context_release(chr->gcontext); 1021 1022 /* 1023 * The completion callback (qemu_chr_socket_connected) for 1024 * s->connect_task should have set this to NULL by the time 1025 * qio_task_wait_thread has returned. 1026 */ 1027 assert(!s->connect_task); 1028 1029 /* 1030 * NB we are *not* guaranteed to have "s->state == ..CONNECTED" 1031 * at this point as this first connect may be failed, so 1032 * allow the next loop to run regardless. 1033 */ 1034 } 1035 1036 while (s->state != TCP_CHARDEV_STATE_CONNECTED) { 1037 if (s->is_listen) { 1038 tcp_chr_accept_server_sync(chr); 1039 } else { 1040 Error *err = NULL; 1041 if (tcp_chr_connect_client_sync(chr, &err) < 0) { 1042 if (s->reconnect_time) { 1043 error_free(err); 1044 g_usleep(s->reconnect_time * 1000ULL * 1000ULL); 1045 } else { 1046 error_propagate(errp, err); 1047 return -1; 1048 } 1049 } 1050 } 1051 } 1052 1053 return 0; 1054 } 1055 1056 static void char_socket_finalize(Object *obj) 1057 { 1058 Chardev *chr = CHARDEV(obj); 1059 SocketChardev *s = SOCKET_CHARDEV(obj); 1060 1061 tcp_chr_free_connection(chr); 1062 tcp_chr_reconn_timer_cancel(s); 1063 qapi_free_SocketAddress(s->addr); 1064 tcp_chr_telnet_destroy(s); 1065 g_free(s->telnet_init); 1066 if (s->listener) { 1067 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 1068 NULL, chr->gcontext); 1069 object_unref(OBJECT(s->listener)); 1070 } 1071 if (s->tls_creds) { 1072 object_unref(OBJECT(s->tls_creds)); 1073 } 1074 g_free(s->tls_authz); 1075 if (s->registered_yank) { 1076 /* 1077 * In the chardev-change special-case, we shouldn't unregister the yank 1078 * instance, as it still may be needed. 1079 */ 1080 if (!chr->handover_yank_instance) { 1081 yank_unregister_instance(CHARDEV_YANK_INSTANCE(chr->label)); 1082 } 1083 } 1084 1085 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 1086 } 1087 1088 static void qemu_chr_socket_connected(QIOTask *task, void *opaque) 1089 { 1090 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1091 Chardev *chr = CHARDEV(opaque); 1092 SocketChardev *s = SOCKET_CHARDEV(chr); 1093 Error *err = NULL; 1094 1095 s->connect_task = NULL; 1096 1097 if (qio_task_propagate_error(task, &err)) { 1098 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 1099 if (s->registered_yank) { 1100 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 1101 char_socket_yank_iochannel, 1102 QIO_CHANNEL(sioc)); 1103 } 1104 check_report_connect_error(chr, err); 1105 goto cleanup; 1106 } 1107 1108 s->connect_err_reported = false; 1109 tcp_chr_new_client(chr, sioc); 1110 1111 cleanup: 1112 object_unref(OBJECT(sioc)); 1113 } 1114 1115 1116 static void tcp_chr_connect_client_task(QIOTask *task, 1117 gpointer opaque) 1118 { 1119 QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1120 SocketAddress *addr = opaque; 1121 Error *err = NULL; 1122 1123 qio_channel_socket_connect_sync(ioc, addr, &err); 1124 1125 qio_task_set_error(task, err); 1126 } 1127 1128 1129 static void tcp_chr_connect_client_async(Chardev *chr) 1130 { 1131 SocketChardev *s = SOCKET_CHARDEV(chr); 1132 QIOChannelSocket *sioc; 1133 1134 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 1135 sioc = qio_channel_socket_new(); 1136 tcp_chr_set_client_ioc_name(chr, sioc); 1137 if (s->registered_yank) { 1138 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 1139 char_socket_yank_iochannel, 1140 QIO_CHANNEL(sioc)); 1141 } 1142 /* 1143 * Normally code would use the qio_channel_socket_connect_async 1144 * method which uses a QIOTask + qio_task_set_error internally 1145 * to avoid blocking. The tcp_chr_wait_connected method, however, 1146 * needs a way to synchronize with completion of the background 1147 * connect task which can't be done with the QIOChannelSocket 1148 * async APIs. Thus we must use QIOTask directly to implement 1149 * the non-blocking concept locally. 1150 */ 1151 s->connect_task = qio_task_new(OBJECT(sioc), 1152 qemu_chr_socket_connected, 1153 object_ref(OBJECT(chr)), 1154 (GDestroyNotify)object_unref); 1155 qio_task_run_in_thread(s->connect_task, 1156 tcp_chr_connect_client_task, 1157 s->addr, 1158 NULL, 1159 chr->gcontext); 1160 } 1161 1162 static gboolean socket_reconnect_timeout(gpointer opaque) 1163 { 1164 Chardev *chr = CHARDEV(opaque); 1165 SocketChardev *s = SOCKET_CHARDEV(opaque); 1166 1167 qemu_mutex_lock(&chr->chr_write_lock); 1168 g_source_unref(s->reconnect_timer); 1169 s->reconnect_timer = NULL; 1170 qemu_mutex_unlock(&chr->chr_write_lock); 1171 1172 if (chr->be_open) { 1173 return false; 1174 } 1175 1176 tcp_chr_connect_client_async(chr); 1177 1178 return false; 1179 } 1180 1181 1182 static int qmp_chardev_open_socket_server(Chardev *chr, 1183 bool is_telnet, 1184 bool is_waitconnect, 1185 Error **errp) 1186 { 1187 SocketChardev *s = SOCKET_CHARDEV(chr); 1188 char *name; 1189 if (is_telnet) { 1190 s->do_telnetopt = 1; 1191 } 1192 s->listener = qio_net_listener_new(); 1193 1194 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label); 1195 qio_net_listener_set_name(s->listener, name); 1196 g_free(name); 1197 1198 if (s->addr->type == SOCKET_ADDRESS_TYPE_FD && !*s->addr->u.fd.str) { 1199 goto skip_listen; 1200 } 1201 1202 if (qio_net_listener_open_sync(s->listener, s->addr, 1, errp) < 0) { 1203 object_unref(OBJECT(s->listener)); 1204 s->listener = NULL; 1205 return -1; 1206 } 1207 1208 qapi_free_SocketAddress(s->addr); 1209 s->addr = socket_local_address(s->listener->sioc[0]->fd, errp); 1210 1211 skip_listen: 1212 update_disconnected_filename(s); 1213 1214 if (is_waitconnect) { 1215 tcp_chr_accept_server_sync(chr); 1216 } else { 1217 qio_net_listener_set_client_func_full(s->listener, 1218 tcp_chr_accept, 1219 chr, NULL, 1220 chr->gcontext); 1221 } 1222 1223 return 0; 1224 } 1225 1226 1227 static int qmp_chardev_open_socket_client(Chardev *chr, 1228 int64_t reconnect, 1229 Error **errp) 1230 { 1231 SocketChardev *s = SOCKET_CHARDEV(chr); 1232 1233 if (reconnect > 0) { 1234 s->reconnect_time = reconnect; 1235 tcp_chr_connect_client_async(chr); 1236 return 0; 1237 } else { 1238 return tcp_chr_connect_client_sync(chr, errp); 1239 } 1240 } 1241 1242 1243 static bool qmp_chardev_validate_socket(ChardevSocket *sock, 1244 SocketAddress *addr, 1245 Error **errp) 1246 { 1247 /* Validate any options which have a dependency on address type */ 1248 switch (addr->type) { 1249 case SOCKET_ADDRESS_TYPE_FD: 1250 if (sock->has_reconnect) { 1251 error_setg(errp, 1252 "'reconnect' option is incompatible with " 1253 "'fd' address type"); 1254 return false; 1255 } 1256 if (sock->has_tls_creds && 1257 !(sock->has_server && sock->server)) { 1258 error_setg(errp, 1259 "'tls_creds' option is incompatible with " 1260 "'fd' address type as client"); 1261 return false; 1262 } 1263 break; 1264 1265 case SOCKET_ADDRESS_TYPE_UNIX: 1266 if (sock->has_tls_creds) { 1267 error_setg(errp, 1268 "'tls_creds' option is incompatible with " 1269 "'unix' address type"); 1270 return false; 1271 } 1272 break; 1273 1274 case SOCKET_ADDRESS_TYPE_INET: 1275 break; 1276 1277 case SOCKET_ADDRESS_TYPE_VSOCK: 1278 if (sock->has_tls_creds) { 1279 error_setg(errp, 1280 "'tls_creds' option is incompatible with " 1281 "'vsock' address type"); 1282 return false; 1283 } 1284 1285 default: 1286 break; 1287 } 1288 1289 if (sock->has_tls_authz && !sock->has_tls_creds) { 1290 error_setg(errp, "'tls_authz' option requires 'tls_creds' option"); 1291 return false; 1292 } 1293 1294 /* Validate any options which have a dependancy on client vs server */ 1295 if (!sock->has_server || sock->server) { 1296 if (sock->has_reconnect) { 1297 error_setg(errp, 1298 "'reconnect' option is incompatible with " 1299 "socket in server listen mode"); 1300 return false; 1301 } 1302 } else { 1303 if (sock->has_websocket && sock->websocket) { 1304 error_setg(errp, "%s", "Websocket client is not implemented"); 1305 return false; 1306 } 1307 if (sock->has_wait) { 1308 error_setg(errp, "%s", 1309 "'wait' option is incompatible with " 1310 "socket in client connect mode"); 1311 return false; 1312 } 1313 } 1314 1315 return true; 1316 } 1317 1318 1319 static void qmp_chardev_open_socket(Chardev *chr, 1320 ChardevBackend *backend, 1321 bool *be_opened, 1322 Error **errp) 1323 { 1324 SocketChardev *s = SOCKET_CHARDEV(chr); 1325 ChardevSocket *sock = backend->u.socket.data; 1326 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false; 1327 bool is_listen = sock->has_server ? sock->server : true; 1328 bool is_telnet = sock->has_telnet ? sock->telnet : false; 1329 bool is_tn3270 = sock->has_tn3270 ? sock->tn3270 : false; 1330 bool is_waitconnect = sock->has_wait ? sock->wait : false; 1331 bool is_websock = sock->has_websocket ? sock->websocket : false; 1332 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; 1333 SocketAddress *addr; 1334 1335 s->is_listen = is_listen; 1336 s->is_telnet = is_telnet; 1337 s->is_tn3270 = is_tn3270; 1338 s->is_websock = is_websock; 1339 s->do_nodelay = do_nodelay; 1340 if (sock->tls_creds) { 1341 Object *creds; 1342 creds = object_resolve_path_component( 1343 object_get_objects_root(), sock->tls_creds); 1344 if (!creds) { 1345 error_setg(errp, "No TLS credentials with id '%s'", 1346 sock->tls_creds); 1347 return; 1348 } 1349 s->tls_creds = (QCryptoTLSCreds *) 1350 object_dynamic_cast(creds, 1351 TYPE_QCRYPTO_TLS_CREDS); 1352 if (!s->tls_creds) { 1353 error_setg(errp, "Object with id '%s' is not TLS credentials", 1354 sock->tls_creds); 1355 return; 1356 } 1357 object_ref(OBJECT(s->tls_creds)); 1358 if (!qcrypto_tls_creds_check_endpoint(s->tls_creds, 1359 is_listen 1360 ? QCRYPTO_TLS_CREDS_ENDPOINT_SERVER 1361 : QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT, 1362 errp)) { 1363 return; 1364 } 1365 } 1366 s->tls_authz = g_strdup(sock->tls_authz); 1367 1368 s->addr = addr = socket_address_flatten(sock->addr); 1369 1370 if (!qmp_chardev_validate_socket(sock, addr, errp)) { 1371 return; 1372 } 1373 1374 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); 1375 /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */ 1376 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) { 1377 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); 1378 } 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->has_tls_creds = qemu_opt_get(opts, "tls-creds"); 1469 sock->tls_creds = g_strdup(qemu_opt_get(opts, "tls-creds")); 1470 sock->has_tls_authz = qemu_opt_get(opts, "tls-authz"); 1471 sock->tls_authz = g_strdup(qemu_opt_get(opts, "tls-authz")); 1472 1473 addr = g_new0(SocketAddressLegacy, 1); 1474 if (path) { 1475 UnixSocketAddress *q_unix; 1476 addr->type = SOCKET_ADDRESS_TYPE_UNIX; 1477 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 1478 q_unix->path = g_strdup(path); 1479 #ifdef CONFIG_LINUX 1480 q_unix->has_tight = true; 1481 q_unix->tight = tight; 1482 q_unix->has_abstract = true; 1483 q_unix->abstract = abstract; 1484 #endif 1485 } else if (host) { 1486 addr->type = SOCKET_ADDRESS_TYPE_INET; 1487 addr->u.inet.data = g_new(InetSocketAddress, 1); 1488 *addr->u.inet.data = (InetSocketAddress) { 1489 .host = g_strdup(host), 1490 .port = g_strdup(port), 1491 .has_to = qemu_opt_get(opts, "to"), 1492 .to = qemu_opt_get_number(opts, "to", 0), 1493 .has_ipv4 = qemu_opt_get(opts, "ipv4"), 1494 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), 1495 .has_ipv6 = qemu_opt_get(opts, "ipv6"), 1496 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), 1497 }; 1498 } else { 1499 addr->type = SOCKET_ADDRESS_TYPE_FD; 1500 addr->u.fd.data = g_new(String, 1); 1501 addr->u.fd.data->str = g_strdup(fd); 1502 } 1503 sock->addr = addr; 1504 } 1505 1506 static void 1507 char_socket_get_addr(Object *obj, Visitor *v, const char *name, 1508 void *opaque, Error **errp) 1509 { 1510 SocketChardev *s = SOCKET_CHARDEV(obj); 1511 1512 visit_type_SocketAddress(v, name, &s->addr, errp); 1513 } 1514 1515 static bool 1516 char_socket_get_connected(Object *obj, Error **errp) 1517 { 1518 SocketChardev *s = SOCKET_CHARDEV(obj); 1519 1520 return s->state == TCP_CHARDEV_STATE_CONNECTED; 1521 } 1522 1523 static void char_socket_class_init(ObjectClass *oc, void *data) 1524 { 1525 ChardevClass *cc = CHARDEV_CLASS(oc); 1526 1527 cc->supports_yank = true; 1528 1529 cc->parse = qemu_chr_parse_socket; 1530 cc->open = qmp_chardev_open_socket; 1531 cc->chr_wait_connected = tcp_chr_wait_connected; 1532 cc->chr_write = tcp_chr_write; 1533 cc->chr_sync_read = tcp_chr_sync_read; 1534 cc->chr_disconnect = tcp_chr_disconnect; 1535 cc->get_msgfds = tcp_get_msgfds; 1536 cc->set_msgfds = tcp_set_msgfds; 1537 cc->chr_add_client = tcp_chr_add_client; 1538 cc->chr_add_watch = tcp_chr_add_watch; 1539 cc->chr_update_read_handler = tcp_chr_update_read_handler; 1540 1541 object_class_property_add(oc, "addr", "SocketAddress", 1542 char_socket_get_addr, NULL, 1543 NULL, NULL); 1544 1545 object_class_property_add_bool(oc, "connected", char_socket_get_connected, 1546 NULL); 1547 } 1548 1549 static const TypeInfo char_socket_type_info = { 1550 .name = TYPE_CHARDEV_SOCKET, 1551 .parent = TYPE_CHARDEV, 1552 .instance_size = sizeof(SocketChardev), 1553 .instance_finalize = char_socket_finalize, 1554 .class_init = char_socket_class_init, 1555 }; 1556 1557 static void register_types(void) 1558 { 1559 type_register_static(&char_socket_type_info); 1560 } 1561 1562 type_init(register_types); 1563