1 /* 2 * QEMU System Emulator 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #include "qemu/osdep.h" 26 #include "chardev/char.h" 27 #include "io/channel-socket.h" 28 #include "io/channel-websock.h" 29 #include "qemu/error-report.h" 30 #include "qemu/module.h" 31 #include "qemu/option.h" 32 #include "qapi/error.h" 33 #include "qapi/clone-visitor.h" 34 #include "qapi/qapi-visit-sockets.h" 35 #include "qemu/yank.h" 36 37 #include "chardev/char-io.h" 38 #include "chardev/char-socket.h" 39 40 static gboolean socket_reconnect_timeout(gpointer opaque); 41 static void tcp_chr_telnet_init(Chardev *chr); 42 43 static void tcp_chr_change_state(SocketChardev *s, TCPChardevState state) 44 { 45 switch (state) { 46 case TCP_CHARDEV_STATE_DISCONNECTED: 47 break; 48 case TCP_CHARDEV_STATE_CONNECTING: 49 assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED); 50 break; 51 case TCP_CHARDEV_STATE_CONNECTED: 52 assert(s->state == TCP_CHARDEV_STATE_CONNECTING); 53 break; 54 } 55 s->state = state; 56 } 57 58 static void tcp_chr_reconn_timer_cancel(SocketChardev *s) 59 { 60 if (s->reconnect_timer) { 61 g_source_destroy(s->reconnect_timer); 62 g_source_unref(s->reconnect_timer); 63 s->reconnect_timer = NULL; 64 } 65 } 66 67 static void qemu_chr_socket_restart_timer(Chardev *chr) 68 { 69 SocketChardev *s = SOCKET_CHARDEV(chr); 70 char *name; 71 72 assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED); 73 assert(!s->reconnect_timer); 74 name = g_strdup_printf("chardev-socket-reconnect-%s", chr->label); 75 s->reconnect_timer = qemu_chr_timeout_add_ms(chr, 76 s->reconnect_time * 1000, 77 socket_reconnect_timeout, 78 chr); 79 g_source_set_name(s->reconnect_timer, name); 80 g_free(name); 81 } 82 83 static void check_report_connect_error(Chardev *chr, 84 Error *err) 85 { 86 SocketChardev *s = SOCKET_CHARDEV(chr); 87 88 if (!s->connect_err_reported) { 89 error_reportf_err(err, 90 "Unable to connect character device %s: ", 91 chr->label); 92 s->connect_err_reported = true; 93 } else { 94 error_free(err); 95 } 96 qemu_chr_socket_restart_timer(chr); 97 } 98 99 static void tcp_chr_accept(QIONetListener *listener, 100 QIOChannelSocket *cioc, 101 void *opaque); 102 103 static int tcp_chr_read_poll(void *opaque); 104 static void tcp_chr_disconnect_locked(Chardev *chr); 105 106 /* Called with chr_write_lock held. */ 107 static int tcp_chr_write(Chardev *chr, const uint8_t *buf, int len) 108 { 109 SocketChardev *s = SOCKET_CHARDEV(chr); 110 111 if (s->state == TCP_CHARDEV_STATE_CONNECTED) { 112 int ret = io_channel_send_full(s->ioc, buf, len, 113 s->write_msgfds, 114 s->write_msgfds_num); 115 116 /* free the written msgfds in any cases 117 * other than ret < 0 && errno == EAGAIN 118 */ 119 if (!(ret < 0 && EAGAIN == errno) 120 && s->write_msgfds_num) { 121 g_free(s->write_msgfds); 122 s->write_msgfds = 0; 123 s->write_msgfds_num = 0; 124 } 125 126 if (ret < 0 && errno != EAGAIN) { 127 if (tcp_chr_read_poll(chr) <= 0) { 128 /* Perform disconnect and return error. */ 129 tcp_chr_disconnect_locked(chr); 130 } /* else let the read handler finish it properly */ 131 } 132 133 return ret; 134 } else { 135 /* Indicate an error. */ 136 errno = EIO; 137 return -1; 138 } 139 } 140 141 static int tcp_chr_read_poll(void *opaque) 142 { 143 Chardev *chr = CHARDEV(opaque); 144 SocketChardev *s = SOCKET_CHARDEV(opaque); 145 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 146 return 0; 147 } 148 s->max_size = qemu_chr_be_can_write(chr); 149 return s->max_size; 150 } 151 152 static void tcp_chr_process_IAC_bytes(Chardev *chr, 153 SocketChardev *s, 154 uint8_t *buf, int *size) 155 { 156 /* Handle any telnet or tn3270 client's basic IAC options. 157 * For telnet options, it satisfies char by char mode with no echo. 158 * For tn3270 options, it satisfies binary mode with EOR. 159 * All IAC options will be removed from the buf and the do_opt 160 * pointer will be used to track the state of the width of the 161 * IAC information. 162 * 163 * RFC854: "All TELNET commands consist of at least a two byte sequence. 164 * The commands dealing with option negotiation are three byte sequences, 165 * the third byte being the code for the option referenced." 166 * "IAC BREAK", "IAC IP", "IAC NOP" and the double IAC are two bytes. 167 * "IAC SB", "IAC SE" and "IAC EOR" are saved to split up data boundary 168 * for tn3270. 169 * NOP, Break and Interrupt Process(IP) might be encountered during a TN3270 170 * session, and NOP and IP need to be done later. 171 */ 172 173 int i; 174 int j = 0; 175 176 for (i = 0; i < *size; i++) { 177 if (s->do_telnetopt > 1) { 178 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) { 179 /* Double IAC means send an IAC */ 180 if (j != i) { 181 buf[j] = buf[i]; 182 } 183 j++; 184 s->do_telnetopt = 1; 185 } else { 186 if ((unsigned char)buf[i] == IAC_BREAK 187 && s->do_telnetopt == 2) { 188 /* Handle IAC break commands by sending a serial break */ 189 qemu_chr_be_event(chr, CHR_EVENT_BREAK); 190 s->do_telnetopt++; 191 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_EOR 192 || (unsigned char)buf[i] == IAC_SB 193 || (unsigned char)buf[i] == IAC_SE) 194 && s->do_telnetopt == 2) { 195 buf[j++] = IAC; 196 buf[j++] = buf[i]; 197 s->do_telnetopt++; 198 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_IP 199 || (unsigned char)buf[i] == IAC_NOP) 200 && s->do_telnetopt == 2) { 201 /* TODO: IP and NOP need to be implemented later. */ 202 s->do_telnetopt++; 203 } 204 s->do_telnetopt++; 205 } 206 if (s->do_telnetopt >= 4) { 207 s->do_telnetopt = 1; 208 } 209 } else { 210 if ((unsigned char)buf[i] == IAC) { 211 s->do_telnetopt = 2; 212 } else { 213 if (j != i) { 214 buf[j] = buf[i]; 215 } 216 j++; 217 } 218 } 219 } 220 *size = j; 221 } 222 223 static int tcp_get_msgfds(Chardev *chr, int *fds, int num) 224 { 225 SocketChardev *s = SOCKET_CHARDEV(chr); 226 227 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num; 228 229 assert(num <= TCP_MAX_FDS); 230 231 if (to_copy) { 232 int i; 233 234 memcpy(fds, s->read_msgfds, to_copy * sizeof(int)); 235 236 /* Close unused fds */ 237 for (i = to_copy; i < s->read_msgfds_num; i++) { 238 close(s->read_msgfds[i]); 239 } 240 241 g_free(s->read_msgfds); 242 s->read_msgfds = 0; 243 s->read_msgfds_num = 0; 244 } 245 246 return to_copy; 247 } 248 249 static int tcp_set_msgfds(Chardev *chr, int *fds, int num) 250 { 251 SocketChardev *s = SOCKET_CHARDEV(chr); 252 253 /* clear old pending fd array */ 254 g_free(s->write_msgfds); 255 s->write_msgfds = NULL; 256 s->write_msgfds_num = 0; 257 258 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) || 259 !qio_channel_has_feature(s->ioc, 260 QIO_CHANNEL_FEATURE_FD_PASS)) { 261 return -1; 262 } 263 264 if (num) { 265 s->write_msgfds = g_new(int, num); 266 memcpy(s->write_msgfds, fds, num * sizeof(int)); 267 } 268 269 s->write_msgfds_num = num; 270 271 return 0; 272 } 273 274 static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len) 275 { 276 SocketChardev *s = SOCKET_CHARDEV(chr); 277 struct iovec iov = { .iov_base = buf, .iov_len = len }; 278 int ret; 279 size_t i; 280 int *msgfds = NULL; 281 size_t msgfds_num = 0; 282 283 if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) { 284 ret = qio_channel_readv_full(s->ioc, &iov, 1, 285 &msgfds, &msgfds_num, 286 0, NULL); 287 } else { 288 ret = qio_channel_readv_full(s->ioc, &iov, 1, 289 NULL, NULL, 290 0, NULL); 291 } 292 293 if (msgfds_num) { 294 /* close and clean read_msgfds */ 295 for (i = 0; i < s->read_msgfds_num; i++) { 296 close(s->read_msgfds[i]); 297 } 298 299 if (s->read_msgfds_num) { 300 g_free(s->read_msgfds); 301 } 302 303 s->read_msgfds = msgfds; 304 s->read_msgfds_num = msgfds_num; 305 } 306 307 for (i = 0; i < s->read_msgfds_num; i++) { 308 int fd = s->read_msgfds[i]; 309 if (fd < 0) { 310 continue; 311 } 312 313 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */ 314 qemu_socket_set_block(fd); 315 316 #ifndef MSG_CMSG_CLOEXEC 317 qemu_set_cloexec(fd); 318 #endif 319 } 320 321 if (ret == QIO_CHANNEL_ERR_BLOCK) { 322 errno = EAGAIN; 323 ret = -1; 324 } else if (ret == -1) { 325 errno = EIO; 326 } 327 328 return ret; 329 } 330 331 static GSource *tcp_chr_add_watch(Chardev *chr, GIOCondition cond) 332 { 333 SocketChardev *s = SOCKET_CHARDEV(chr); 334 if (!s->ioc) { 335 return NULL; 336 } 337 return qio_channel_create_watch(s->ioc, cond); 338 } 339 340 static void remove_hup_source(SocketChardev *s) 341 { 342 if (s->hup_source != NULL) { 343 g_source_destroy(s->hup_source); 344 g_source_unref(s->hup_source); 345 s->hup_source = NULL; 346 } 347 } 348 349 static void char_socket_yank_iochannel(void *opaque) 350 { 351 QIOChannel *ioc = QIO_CHANNEL(opaque); 352 353 qio_channel_shutdown(ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL); 354 } 355 356 static void tcp_chr_free_connection(Chardev *chr) 357 { 358 SocketChardev *s = SOCKET_CHARDEV(chr); 359 int i; 360 361 if (s->read_msgfds_num) { 362 for (i = 0; i < s->read_msgfds_num; i++) { 363 close(s->read_msgfds[i]); 364 } 365 g_free(s->read_msgfds); 366 s->read_msgfds = NULL; 367 s->read_msgfds_num = 0; 368 } 369 370 remove_hup_source(s); 371 372 tcp_set_msgfds(chr, NULL, 0); 373 remove_fd_in_watch(chr); 374 if (s->registered_yank && 375 (s->state == TCP_CHARDEV_STATE_CONNECTING 376 || s->state == TCP_CHARDEV_STATE_CONNECTED)) { 377 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 378 char_socket_yank_iochannel, 379 QIO_CHANNEL(s->sioc)); 380 } 381 382 if (s->ioc) { 383 qio_channel_close(s->ioc, NULL); 384 } 385 object_unref(OBJECT(s->sioc)); 386 s->sioc = NULL; 387 object_unref(OBJECT(s->ioc)); 388 s->ioc = NULL; 389 g_free(chr->filename); 390 chr->filename = NULL; 391 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 392 } 393 394 static const char *qemu_chr_socket_protocol(SocketChardev *s) 395 { 396 if (s->is_telnet) { 397 return "telnet"; 398 } 399 return s->is_websock ? "websocket" : "tcp"; 400 } 401 402 static char *qemu_chr_socket_address(SocketChardev *s, const char *prefix) 403 { 404 switch (s->addr->type) { 405 case SOCKET_ADDRESS_TYPE_INET: 406 return g_strdup_printf("%s%s:%s:%s%s", prefix, 407 qemu_chr_socket_protocol(s), 408 s->addr->u.inet.host, 409 s->addr->u.inet.port, 410 s->is_listen ? ",server=on" : ""); 411 break; 412 case SOCKET_ADDRESS_TYPE_UNIX: 413 { 414 const char *tight = "", *abstract = ""; 415 UnixSocketAddress *sa = &s->addr->u.q_unix; 416 417 #ifdef CONFIG_LINUX 418 if (sa->has_abstract && sa->abstract) { 419 abstract = ",abstract=on"; 420 if (sa->has_tight && sa->tight) { 421 tight = ",tight=on"; 422 } 423 } 424 #endif 425 426 return g_strdup_printf("%sunix:%s%s%s%s", prefix, sa->path, 427 abstract, tight, 428 s->is_listen ? ",server=on" : ""); 429 break; 430 } 431 case SOCKET_ADDRESS_TYPE_FD: 432 return g_strdup_printf("%sfd:%s%s", prefix, s->addr->u.fd.str, 433 s->is_listen ? ",server=on" : ""); 434 break; 435 case SOCKET_ADDRESS_TYPE_VSOCK: 436 return g_strdup_printf("%svsock:%s:%s", prefix, 437 s->addr->u.vsock.cid, 438 s->addr->u.vsock.port); 439 default: 440 abort(); 441 } 442 } 443 444 static void update_disconnected_filename(SocketChardev *s) 445 { 446 Chardev *chr = CHARDEV(s); 447 448 g_free(chr->filename); 449 if (s->addr) { 450 chr->filename = qemu_chr_socket_address(s, "disconnected:"); 451 } else { 452 chr->filename = g_strdup("disconnected:socket"); 453 } 454 } 455 456 /* NB may be called even if tcp_chr_connect has not been 457 * reached, due to TLS or telnet initialization failure, 458 * so can *not* assume s->state == TCP_CHARDEV_STATE_CONNECTED 459 * This must be called with chr->chr_write_lock held. 460 */ 461 static void tcp_chr_disconnect_locked(Chardev *chr) 462 { 463 SocketChardev *s = SOCKET_CHARDEV(chr); 464 bool emit_close = s->state == TCP_CHARDEV_STATE_CONNECTED; 465 466 tcp_chr_free_connection(chr); 467 468 if (s->listener) { 469 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 470 chr, NULL, chr->gcontext); 471 } 472 update_disconnected_filename(s); 473 if (emit_close) { 474 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 475 } 476 if (s->reconnect_time && !s->reconnect_timer) { 477 qemu_chr_socket_restart_timer(chr); 478 } 479 } 480 481 static void tcp_chr_disconnect(Chardev *chr) 482 { 483 qemu_mutex_lock(&chr->chr_write_lock); 484 tcp_chr_disconnect_locked(chr); 485 qemu_mutex_unlock(&chr->chr_write_lock); 486 } 487 488 static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) 489 { 490 Chardev *chr = CHARDEV(opaque); 491 SocketChardev *s = SOCKET_CHARDEV(opaque); 492 uint8_t buf[CHR_READ_BUF_LEN]; 493 int len, size; 494 495 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) || 496 s->max_size <= 0) { 497 return TRUE; 498 } 499 len = tcp_chr_read_poll(opaque); 500 if (len > sizeof(buf)) { 501 len = sizeof(buf); 502 } 503 size = tcp_chr_recv(chr, (void *)buf, len); 504 if (size == 0 || (size == -1 && errno != EAGAIN)) { 505 /* connection closed */ 506 tcp_chr_disconnect(chr); 507 } else if (size > 0) { 508 if (s->do_telnetopt) { 509 tcp_chr_process_IAC_bytes(chr, s, buf, &size); 510 } 511 if (size > 0) { 512 qemu_chr_be_write(chr, buf, size); 513 } 514 } 515 516 return TRUE; 517 } 518 519 static gboolean tcp_chr_hup(QIOChannel *channel, 520 GIOCondition cond, 521 void *opaque) 522 { 523 Chardev *chr = CHARDEV(opaque); 524 tcp_chr_disconnect(chr); 525 return G_SOURCE_REMOVE; 526 } 527 528 static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len) 529 { 530 SocketChardev *s = SOCKET_CHARDEV(chr); 531 int size; 532 int saved_errno; 533 534 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 535 return 0; 536 } 537 538 qio_channel_set_blocking(s->ioc, true, NULL); 539 size = tcp_chr_recv(chr, (void *) buf, len); 540 saved_errno = errno; 541 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 542 qio_channel_set_blocking(s->ioc, false, NULL); 543 } 544 if (size == 0) { 545 /* connection closed */ 546 tcp_chr_disconnect(chr); 547 } 548 549 errno = saved_errno; 550 return size; 551 } 552 553 static char *qemu_chr_compute_filename(SocketChardev *s) 554 { 555 struct sockaddr_storage *ss = &s->sioc->localAddr; 556 struct sockaddr_storage *ps = &s->sioc->remoteAddr; 557 socklen_t ss_len = s->sioc->localAddrLen; 558 socklen_t ps_len = s->sioc->remoteAddrLen; 559 char shost[NI_MAXHOST], sserv[NI_MAXSERV]; 560 char phost[NI_MAXHOST], pserv[NI_MAXSERV]; 561 const char *left = "", *right = ""; 562 563 switch (ss->ss_family) { 564 case AF_UNIX: 565 return g_strdup_printf("unix:%s%s", 566 ((struct sockaddr_un *)(ss))->sun_path, 567 s->is_listen ? ",server=on" : ""); 568 case AF_INET6: 569 left = "["; 570 right = "]"; 571 /* fall through */ 572 case AF_INET: 573 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost), 574 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV); 575 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost), 576 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV); 577 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s", 578 qemu_chr_socket_protocol(s), 579 left, shost, right, sserv, 580 s->is_listen ? ",server=on" : "", 581 left, phost, right, pserv); 582 583 default: 584 return g_strdup_printf("unknown"); 585 } 586 } 587 588 static void update_ioc_handlers(SocketChardev *s) 589 { 590 Chardev *chr = CHARDEV(s); 591 592 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 593 return; 594 } 595 596 remove_fd_in_watch(chr); 597 chr->gsource = io_add_watch_poll(chr, s->ioc, 598 tcp_chr_read_poll, 599 tcp_chr_read, chr, 600 chr->gcontext); 601 602 remove_hup_source(s); 603 s->hup_source = qio_channel_create_watch(s->ioc, G_IO_HUP); 604 g_source_set_callback(s->hup_source, (GSourceFunc)tcp_chr_hup, 605 chr, NULL); 606 g_source_attach(s->hup_source, chr->gcontext); 607 } 608 609 static void tcp_chr_connect(void *opaque) 610 { 611 Chardev *chr = CHARDEV(opaque); 612 SocketChardev *s = SOCKET_CHARDEV(opaque); 613 614 g_free(chr->filename); 615 chr->filename = qemu_chr_compute_filename(s); 616 617 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTED); 618 update_ioc_handlers(s); 619 qemu_chr_be_event(chr, CHR_EVENT_OPENED); 620 } 621 622 static void tcp_chr_telnet_destroy(SocketChardev *s) 623 { 624 if (s->telnet_source) { 625 g_source_destroy(s->telnet_source); 626 g_source_unref(s->telnet_source); 627 s->telnet_source = NULL; 628 } 629 } 630 631 static void tcp_chr_update_read_handler(Chardev *chr) 632 { 633 SocketChardev *s = SOCKET_CHARDEV(chr); 634 635 if (s->listener && s->state == TCP_CHARDEV_STATE_DISCONNECTED) { 636 /* 637 * It's possible that chardev context is changed in 638 * qemu_chr_be_update_read_handlers(). Reset it for QIO net 639 * listener if there is. 640 */ 641 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 642 chr, NULL, chr->gcontext); 643 } 644 645 if (s->telnet_source) { 646 tcp_chr_telnet_init(CHARDEV(s)); 647 } 648 649 update_ioc_handlers(s); 650 } 651 652 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, 653 GIOCondition cond G_GNUC_UNUSED, 654 gpointer user_data) 655 { 656 SocketChardev *s = user_data; 657 Chardev *chr = CHARDEV(s); 658 TCPChardevTelnetInit *init = s->telnet_init; 659 ssize_t ret; 660 661 assert(init); 662 663 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL); 664 if (ret < 0) { 665 if (ret == QIO_CHANNEL_ERR_BLOCK) { 666 ret = 0; 667 } else { 668 tcp_chr_disconnect(chr); 669 goto end; 670 } 671 } 672 init->buflen -= ret; 673 674 if (init->buflen == 0) { 675 tcp_chr_connect(chr); 676 goto end; 677 } 678 679 memmove(init->buf, init->buf + ret, init->buflen); 680 681 return G_SOURCE_CONTINUE; 682 683 end: 684 g_free(s->telnet_init); 685 s->telnet_init = NULL; 686 g_source_unref(s->telnet_source); 687 s->telnet_source = NULL; 688 return G_SOURCE_REMOVE; 689 } 690 691 static void tcp_chr_telnet_init(Chardev *chr) 692 { 693 SocketChardev *s = SOCKET_CHARDEV(chr); 694 TCPChardevTelnetInit *init; 695 size_t n = 0; 696 697 /* Destroy existing task */ 698 tcp_chr_telnet_destroy(s); 699 700 if (s->telnet_init) { 701 /* We are possibly during a handshake already */ 702 goto cont; 703 } 704 705 s->telnet_init = g_new0(TCPChardevTelnetInit, 1); 706 init = s->telnet_init; 707 708 #define IACSET(x, a, b, c) \ 709 do { \ 710 x[n++] = a; \ 711 x[n++] = b; \ 712 x[n++] = c; \ 713 } while (0) 714 715 if (!s->is_tn3270) { 716 init->buflen = 12; 717 /* Prep the telnet negotiation to put telnet in binary, 718 * no echo, single char mode */ 719 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ 720 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ 721 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ 722 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ 723 } else { 724 init->buflen = 21; 725 /* Prep the TN3270 negotiation based on RFC1576 */ 726 IACSET(init->buf, 0xff, 0xfd, 0x19); /* IAC DO EOR */ 727 IACSET(init->buf, 0xff, 0xfb, 0x19); /* IAC WILL EOR */ 728 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO BINARY */ 729 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL BINARY */ 730 IACSET(init->buf, 0xff, 0xfd, 0x18); /* IAC DO TERMINAL TYPE */ 731 IACSET(init->buf, 0xff, 0xfa, 0x18); /* IAC SB TERMINAL TYPE */ 732 IACSET(init->buf, 0x01, 0xff, 0xf0); /* SEND IAC SE */ 733 } 734 735 #undef IACSET 736 737 cont: 738 s->telnet_source = qio_channel_add_watch_source(s->ioc, G_IO_OUT, 739 tcp_chr_telnet_init_io, 740 s, NULL, 741 chr->gcontext); 742 } 743 744 745 static void tcp_chr_websock_handshake(QIOTask *task, gpointer user_data) 746 { 747 Chardev *chr = user_data; 748 SocketChardev *s = user_data; 749 Error *err = NULL; 750 751 if (qio_task_propagate_error(task, &err)) { 752 error_reportf_err(err, 753 "websock handshake of character device %s failed: ", 754 chr->label); 755 tcp_chr_disconnect(chr); 756 } else { 757 if (s->do_telnetopt) { 758 tcp_chr_telnet_init(chr); 759 } else { 760 tcp_chr_connect(chr); 761 } 762 } 763 } 764 765 766 static void tcp_chr_websock_init(Chardev *chr) 767 { 768 SocketChardev *s = SOCKET_CHARDEV(chr); 769 QIOChannelWebsock *wioc = NULL; 770 gchar *name; 771 772 wioc = qio_channel_websock_new_server(s->ioc); 773 774 name = g_strdup_printf("chardev-websocket-server-%s", chr->label); 775 qio_channel_set_name(QIO_CHANNEL(wioc), name); 776 g_free(name); 777 object_unref(OBJECT(s->ioc)); 778 s->ioc = QIO_CHANNEL(wioc); 779 780 qio_channel_websock_handshake(wioc, tcp_chr_websock_handshake, chr, NULL); 781 } 782 783 784 static void tcp_chr_tls_handshake(QIOTask *task, 785 gpointer user_data) 786 { 787 Chardev *chr = user_data; 788 SocketChardev *s = user_data; 789 Error *err = NULL; 790 791 if (qio_task_propagate_error(task, &err)) { 792 error_reportf_err(err, 793 "TLS handshake of character device %s failed: ", 794 chr->label); 795 tcp_chr_disconnect(chr); 796 } else { 797 if (s->is_websock) { 798 tcp_chr_websock_init(chr); 799 } else if (s->do_telnetopt) { 800 tcp_chr_telnet_init(chr); 801 } else { 802 tcp_chr_connect(chr); 803 } 804 } 805 } 806 807 808 static void tcp_chr_tls_init(Chardev *chr) 809 { 810 SocketChardev *s = SOCKET_CHARDEV(chr); 811 QIOChannelTLS *tioc; 812 gchar *name; 813 814 if (s->is_listen) { 815 tioc = qio_channel_tls_new_server( 816 s->ioc, s->tls_creds, 817 s->tls_authz, 818 NULL); 819 } else { 820 tioc = qio_channel_tls_new_client( 821 s->ioc, s->tls_creds, 822 s->addr->u.inet.host, 823 NULL); 824 } 825 if (tioc == NULL) { 826 tcp_chr_disconnect(chr); 827 return; 828 } 829 name = g_strdup_printf("chardev-tls-%s-%s", 830 s->is_listen ? "server" : "client", 831 chr->label); 832 qio_channel_set_name(QIO_CHANNEL(tioc), name); 833 g_free(name); 834 object_unref(OBJECT(s->ioc)); 835 s->ioc = QIO_CHANNEL(tioc); 836 837 qio_channel_tls_handshake(tioc, 838 tcp_chr_tls_handshake, 839 chr, 840 NULL, 841 chr->gcontext); 842 } 843 844 845 static void tcp_chr_set_client_ioc_name(Chardev *chr, 846 QIOChannelSocket *sioc) 847 { 848 SocketChardev *s = SOCKET_CHARDEV(chr); 849 char *name; 850 name = g_strdup_printf("chardev-tcp-%s-%s", 851 s->is_listen ? "server" : "client", 852 chr->label); 853 qio_channel_set_name(QIO_CHANNEL(sioc), name); 854 g_free(name); 855 856 } 857 858 static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc) 859 { 860 SocketChardev *s = SOCKET_CHARDEV(chr); 861 862 if (s->state != TCP_CHARDEV_STATE_CONNECTING) { 863 return -1; 864 } 865 866 s->ioc = QIO_CHANNEL(sioc); 867 object_ref(OBJECT(sioc)); 868 s->sioc = sioc; 869 object_ref(OBJECT(sioc)); 870 871 qio_channel_set_blocking(s->ioc, false, NULL); 872 873 if (s->do_nodelay) { 874 qio_channel_set_delay(s->ioc, false); 875 } 876 if (s->listener) { 877 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 878 NULL, chr->gcontext); 879 } 880 881 if (s->tls_creds) { 882 tcp_chr_tls_init(chr); 883 } else if (s->is_websock) { 884 tcp_chr_websock_init(chr); 885 } else if (s->do_telnetopt) { 886 tcp_chr_telnet_init(chr); 887 } else { 888 tcp_chr_connect(chr); 889 } 890 891 return 0; 892 } 893 894 895 static int tcp_chr_add_client(Chardev *chr, int fd) 896 { 897 int ret; 898 QIOChannelSocket *sioc; 899 SocketChardev *s = SOCKET_CHARDEV(chr); 900 901 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 902 return -1; 903 } 904 905 sioc = qio_channel_socket_new_fd(fd, NULL); 906 if (!sioc) { 907 return -1; 908 } 909 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 910 tcp_chr_set_client_ioc_name(chr, sioc); 911 if (s->registered_yank) { 912 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 913 char_socket_yank_iochannel, 914 QIO_CHANNEL(sioc)); 915 } 916 ret = tcp_chr_new_client(chr, sioc); 917 object_unref(OBJECT(sioc)); 918 return ret; 919 } 920 921 static void tcp_chr_accept(QIONetListener *listener, 922 QIOChannelSocket *cioc, 923 void *opaque) 924 { 925 Chardev *chr = CHARDEV(opaque); 926 SocketChardev *s = SOCKET_CHARDEV(chr); 927 928 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 929 tcp_chr_set_client_ioc_name(chr, cioc); 930 if (s->registered_yank) { 931 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 932 char_socket_yank_iochannel, 933 QIO_CHANNEL(cioc)); 934 } 935 tcp_chr_new_client(chr, cioc); 936 } 937 938 939 static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp) 940 { 941 SocketChardev *s = SOCKET_CHARDEV(chr); 942 QIOChannelSocket *sioc = qio_channel_socket_new(); 943 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 944 tcp_chr_set_client_ioc_name(chr, sioc); 945 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) { 946 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 947 object_unref(OBJECT(sioc)); 948 return -1; 949 } 950 if (s->registered_yank) { 951 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 952 char_socket_yank_iochannel, 953 QIO_CHANNEL(sioc)); 954 } 955 tcp_chr_new_client(chr, sioc); 956 object_unref(OBJECT(sioc)); 957 return 0; 958 } 959 960 961 static void tcp_chr_accept_server_sync(Chardev *chr) 962 { 963 SocketChardev *s = SOCKET_CHARDEV(chr); 964 QIOChannelSocket *sioc; 965 info_report("QEMU waiting for connection on: %s", 966 chr->filename); 967 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 968 sioc = qio_net_listener_wait_client(s->listener); 969 tcp_chr_set_client_ioc_name(chr, sioc); 970 if (s->registered_yank) { 971 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 972 char_socket_yank_iochannel, 973 QIO_CHANNEL(sioc)); 974 } 975 tcp_chr_new_client(chr, sioc); 976 object_unref(OBJECT(sioc)); 977 } 978 979 980 static int tcp_chr_wait_connected(Chardev *chr, Error **errp) 981 { 982 SocketChardev *s = SOCKET_CHARDEV(chr); 983 const char *opts[] = { "telnet", "tn3270", "websock", "tls-creds" }; 984 bool optset[] = { s->is_telnet, s->is_tn3270, s->is_websock, s->tls_creds }; 985 size_t i; 986 987 QEMU_BUILD_BUG_ON(G_N_ELEMENTS(opts) != G_N_ELEMENTS(optset)); 988 for (i = 0; i < G_N_ELEMENTS(opts); i++) { 989 if (optset[i]) { 990 error_setg(errp, 991 "'%s' option is incompatible with waiting for " 992 "connection completion", opts[i]); 993 return -1; 994 } 995 } 996 997 tcp_chr_reconn_timer_cancel(s); 998 999 /* 1000 * We expect states to be as follows: 1001 * 1002 * - server 1003 * - wait -> CONNECTED 1004 * - nowait -> DISCONNECTED 1005 * - client 1006 * - reconnect == 0 -> CONNECTED 1007 * - reconnect != 0 -> CONNECTING 1008 * 1009 */ 1010 if (s->state == TCP_CHARDEV_STATE_CONNECTING) { 1011 if (!s->connect_task) { 1012 error_setg(errp, 1013 "Unexpected 'connecting' state without connect task " 1014 "while waiting for connection completion"); 1015 return -1; 1016 } 1017 /* 1018 * tcp_chr_wait_connected should only ever be run from the 1019 * main loop thread associated with chr->gcontext, otherwise 1020 * qio_task_wait_thread has a dangerous race condition with 1021 * free'ing of the s->connect_task object. 1022 * 1023 * Acquiring the main context doesn't 100% prove we're in 1024 * the main loop thread, but it does at least guarantee 1025 * that the main loop won't be executed by another thread 1026 * avoiding the race condition with the task idle callback. 1027 */ 1028 g_main_context_acquire(chr->gcontext); 1029 qio_task_wait_thread(s->connect_task); 1030 g_main_context_release(chr->gcontext); 1031 1032 /* 1033 * The completion callback (qemu_chr_socket_connected) for 1034 * s->connect_task should have set this to NULL by the time 1035 * qio_task_wait_thread has returned. 1036 */ 1037 assert(!s->connect_task); 1038 1039 /* 1040 * NB we are *not* guaranteed to have "s->state == ..CONNECTED" 1041 * at this point as this first connect may be failed, so 1042 * allow the next loop to run regardless. 1043 */ 1044 } 1045 1046 while (s->state != TCP_CHARDEV_STATE_CONNECTED) { 1047 if (s->is_listen) { 1048 tcp_chr_accept_server_sync(chr); 1049 } else { 1050 Error *err = NULL; 1051 if (tcp_chr_connect_client_sync(chr, &err) < 0) { 1052 if (s->reconnect_time) { 1053 error_free(err); 1054 g_usleep(s->reconnect_time * 1000ULL * 1000ULL); 1055 } else { 1056 error_propagate(errp, err); 1057 return -1; 1058 } 1059 } 1060 } 1061 } 1062 1063 return 0; 1064 } 1065 1066 static void char_socket_finalize(Object *obj) 1067 { 1068 Chardev *chr = CHARDEV(obj); 1069 SocketChardev *s = SOCKET_CHARDEV(obj); 1070 1071 tcp_chr_free_connection(chr); 1072 tcp_chr_reconn_timer_cancel(s); 1073 qapi_free_SocketAddress(s->addr); 1074 tcp_chr_telnet_destroy(s); 1075 g_free(s->telnet_init); 1076 if (s->listener) { 1077 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 1078 NULL, chr->gcontext); 1079 object_unref(OBJECT(s->listener)); 1080 s->listener = NULL; 1081 } 1082 if (s->tls_creds) { 1083 object_unref(OBJECT(s->tls_creds)); 1084 } 1085 g_free(s->tls_authz); 1086 if (s->registered_yank) { 1087 /* 1088 * In the chardev-change special-case, we shouldn't unregister the yank 1089 * instance, as it still may be needed. 1090 */ 1091 if (!chr->handover_yank_instance) { 1092 yank_unregister_instance(CHARDEV_YANK_INSTANCE(chr->label)); 1093 } 1094 } 1095 1096 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 1097 } 1098 1099 static void qemu_chr_socket_connected(QIOTask *task, void *opaque) 1100 { 1101 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1102 Chardev *chr = CHARDEV(opaque); 1103 SocketChardev *s = SOCKET_CHARDEV(chr); 1104 Error *err = NULL; 1105 1106 s->connect_task = NULL; 1107 1108 if (qio_task_propagate_error(task, &err)) { 1109 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 1110 if (s->registered_yank) { 1111 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 1112 char_socket_yank_iochannel, 1113 QIO_CHANNEL(sioc)); 1114 } 1115 check_report_connect_error(chr, err); 1116 goto cleanup; 1117 } 1118 1119 s->connect_err_reported = false; 1120 tcp_chr_new_client(chr, sioc); 1121 1122 cleanup: 1123 object_unref(OBJECT(sioc)); 1124 } 1125 1126 1127 static void tcp_chr_connect_client_task(QIOTask *task, 1128 gpointer opaque) 1129 { 1130 QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1131 SocketAddress *addr = opaque; 1132 Error *err = NULL; 1133 1134 qio_channel_socket_connect_sync(ioc, addr, &err); 1135 1136 qio_task_set_error(task, err); 1137 } 1138 1139 1140 static void tcp_chr_connect_client_async(Chardev *chr) 1141 { 1142 SocketChardev *s = SOCKET_CHARDEV(chr); 1143 QIOChannelSocket *sioc; 1144 1145 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 1146 sioc = qio_channel_socket_new(); 1147 tcp_chr_set_client_ioc_name(chr, sioc); 1148 if (s->registered_yank) { 1149 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 1150 char_socket_yank_iochannel, 1151 QIO_CHANNEL(sioc)); 1152 } 1153 /* 1154 * Normally code would use the qio_channel_socket_connect_async 1155 * method which uses a QIOTask + qio_task_set_error internally 1156 * to avoid blocking. The tcp_chr_wait_connected method, however, 1157 * needs a way to synchronize with completion of the background 1158 * connect task which can't be done with the QIOChannelSocket 1159 * async APIs. Thus we must use QIOTask directly to implement 1160 * the non-blocking concept locally. 1161 */ 1162 s->connect_task = qio_task_new(OBJECT(sioc), 1163 qemu_chr_socket_connected, 1164 object_ref(OBJECT(chr)), 1165 (GDestroyNotify)object_unref); 1166 qio_task_run_in_thread(s->connect_task, 1167 tcp_chr_connect_client_task, 1168 s->addr, 1169 NULL, 1170 chr->gcontext); 1171 } 1172 1173 static gboolean socket_reconnect_timeout(gpointer opaque) 1174 { 1175 Chardev *chr = CHARDEV(opaque); 1176 SocketChardev *s = SOCKET_CHARDEV(opaque); 1177 1178 qemu_mutex_lock(&chr->chr_write_lock); 1179 g_source_unref(s->reconnect_timer); 1180 s->reconnect_timer = NULL; 1181 qemu_mutex_unlock(&chr->chr_write_lock); 1182 1183 if (chr->be_open) { 1184 return false; 1185 } 1186 1187 tcp_chr_connect_client_async(chr); 1188 1189 return false; 1190 } 1191 1192 1193 static int qmp_chardev_open_socket_server(Chardev *chr, 1194 bool is_telnet, 1195 bool is_waitconnect, 1196 Error **errp) 1197 { 1198 SocketChardev *s = SOCKET_CHARDEV(chr); 1199 char *name; 1200 if (is_telnet) { 1201 s->do_telnetopt = 1; 1202 } 1203 s->listener = qio_net_listener_new(); 1204 1205 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label); 1206 qio_net_listener_set_name(s->listener, name); 1207 g_free(name); 1208 1209 if (s->addr->type == SOCKET_ADDRESS_TYPE_FD && !*s->addr->u.fd.str) { 1210 goto skip_listen; 1211 } 1212 1213 if (qio_net_listener_open_sync(s->listener, s->addr, 1, errp) < 0) { 1214 object_unref(OBJECT(s->listener)); 1215 s->listener = NULL; 1216 return -1; 1217 } 1218 1219 qapi_free_SocketAddress(s->addr); 1220 s->addr = socket_local_address(s->listener->sioc[0]->fd, errp); 1221 1222 skip_listen: 1223 update_disconnected_filename(s); 1224 1225 if (is_waitconnect) { 1226 tcp_chr_accept_server_sync(chr); 1227 } else { 1228 qio_net_listener_set_client_func_full(s->listener, 1229 tcp_chr_accept, 1230 chr, NULL, 1231 chr->gcontext); 1232 } 1233 1234 return 0; 1235 } 1236 1237 1238 static int qmp_chardev_open_socket_client(Chardev *chr, 1239 int64_t reconnect, 1240 Error **errp) 1241 { 1242 SocketChardev *s = SOCKET_CHARDEV(chr); 1243 1244 if (reconnect > 0) { 1245 s->reconnect_time = reconnect; 1246 tcp_chr_connect_client_async(chr); 1247 return 0; 1248 } else { 1249 return tcp_chr_connect_client_sync(chr, errp); 1250 } 1251 } 1252 1253 1254 static bool qmp_chardev_validate_socket(ChardevSocket *sock, 1255 SocketAddress *addr, 1256 Error **errp) 1257 { 1258 /* Validate any options which have a dependency on address type */ 1259 switch (addr->type) { 1260 case SOCKET_ADDRESS_TYPE_FD: 1261 if (sock->has_reconnect) { 1262 error_setg(errp, 1263 "'reconnect' option is incompatible with " 1264 "'fd' address type"); 1265 return false; 1266 } 1267 if (sock->tls_creds && 1268 !(sock->has_server && sock->server)) { 1269 error_setg(errp, 1270 "'tls_creds' option is incompatible with " 1271 "'fd' address type as client"); 1272 return false; 1273 } 1274 break; 1275 1276 case SOCKET_ADDRESS_TYPE_UNIX: 1277 if (sock->tls_creds) { 1278 error_setg(errp, 1279 "'tls_creds' option is incompatible with " 1280 "'unix' address type"); 1281 return false; 1282 } 1283 break; 1284 1285 case SOCKET_ADDRESS_TYPE_INET: 1286 break; 1287 1288 case SOCKET_ADDRESS_TYPE_VSOCK: 1289 if (sock->tls_creds) { 1290 error_setg(errp, 1291 "'tls_creds' option is incompatible with " 1292 "'vsock' address type"); 1293 return false; 1294 } 1295 1296 default: 1297 break; 1298 } 1299 1300 if (sock->tls_authz && !sock->tls_creds) { 1301 error_setg(errp, "'tls_authz' option requires 'tls_creds' option"); 1302 return false; 1303 } 1304 1305 /* Validate any options which have a dependency on client vs server */ 1306 if (!sock->has_server || sock->server) { 1307 if (sock->has_reconnect) { 1308 error_setg(errp, 1309 "'reconnect' option is incompatible with " 1310 "socket in server listen mode"); 1311 return false; 1312 } 1313 } else { 1314 if (sock->has_websocket && sock->websocket) { 1315 error_setg(errp, "%s", "Websocket client is not implemented"); 1316 return false; 1317 } 1318 if (sock->has_wait) { 1319 error_setg(errp, "%s", 1320 "'wait' option is incompatible with " 1321 "socket in client connect mode"); 1322 return false; 1323 } 1324 } 1325 1326 return true; 1327 } 1328 1329 1330 static void qmp_chardev_open_socket(Chardev *chr, 1331 ChardevBackend *backend, 1332 bool *be_opened, 1333 Error **errp) 1334 { 1335 SocketChardev *s = SOCKET_CHARDEV(chr); 1336 ChardevSocket *sock = backend->u.socket.data; 1337 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false; 1338 bool is_listen = sock->has_server ? sock->server : true; 1339 bool is_telnet = sock->has_telnet ? sock->telnet : false; 1340 bool is_tn3270 = sock->has_tn3270 ? sock->tn3270 : false; 1341 bool is_waitconnect = sock->has_wait ? sock->wait : false; 1342 bool is_websock = sock->has_websocket ? sock->websocket : false; 1343 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; 1344 SocketAddress *addr; 1345 1346 s->is_listen = is_listen; 1347 s->is_telnet = is_telnet; 1348 s->is_tn3270 = is_tn3270; 1349 s->is_websock = is_websock; 1350 s->do_nodelay = do_nodelay; 1351 if (sock->tls_creds) { 1352 Object *creds; 1353 creds = object_resolve_path_component( 1354 object_get_objects_root(), sock->tls_creds); 1355 if (!creds) { 1356 error_setg(errp, "No TLS credentials with id '%s'", 1357 sock->tls_creds); 1358 return; 1359 } 1360 s->tls_creds = (QCryptoTLSCreds *) 1361 object_dynamic_cast(creds, 1362 TYPE_QCRYPTO_TLS_CREDS); 1363 if (!s->tls_creds) { 1364 error_setg(errp, "Object with id '%s' is not TLS credentials", 1365 sock->tls_creds); 1366 return; 1367 } 1368 object_ref(OBJECT(s->tls_creds)); 1369 if (!qcrypto_tls_creds_check_endpoint(s->tls_creds, 1370 is_listen 1371 ? QCRYPTO_TLS_CREDS_ENDPOINT_SERVER 1372 : QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT, 1373 errp)) { 1374 return; 1375 } 1376 } 1377 s->tls_authz = g_strdup(sock->tls_authz); 1378 1379 s->addr = addr = socket_address_flatten(sock->addr); 1380 1381 if (!qmp_chardev_validate_socket(sock, addr, errp)) { 1382 return; 1383 } 1384 1385 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); 1386 #ifndef _WIN32 1387 /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */ 1388 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) { 1389 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); 1390 } 1391 #endif 1392 1393 /* 1394 * In the chardev-change special-case, we shouldn't register a new yank 1395 * instance, as there already may be one. 1396 */ 1397 if (!chr->handover_yank_instance) { 1398 if (!yank_register_instance(CHARDEV_YANK_INSTANCE(chr->label), errp)) { 1399 return; 1400 } 1401 } 1402 s->registered_yank = true; 1403 1404 /* be isn't opened until we get a connection */ 1405 *be_opened = false; 1406 1407 update_disconnected_filename(s); 1408 1409 if (s->is_listen) { 1410 if (qmp_chardev_open_socket_server(chr, is_telnet || is_tn3270, 1411 is_waitconnect, errp) < 0) { 1412 return; 1413 } 1414 } else { 1415 if (qmp_chardev_open_socket_client(chr, reconnect, errp) < 0) { 1416 return; 1417 } 1418 } 1419 } 1420 1421 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend, 1422 Error **errp) 1423 { 1424 const char *path = qemu_opt_get(opts, "path"); 1425 const char *host = qemu_opt_get(opts, "host"); 1426 const char *port = qemu_opt_get(opts, "port"); 1427 const char *fd = qemu_opt_get(opts, "fd"); 1428 #ifdef CONFIG_LINUX 1429 bool tight = qemu_opt_get_bool(opts, "tight", true); 1430 bool abstract = qemu_opt_get_bool(opts, "abstract", false); 1431 #endif 1432 SocketAddressLegacy *addr; 1433 ChardevSocket *sock; 1434 1435 if ((!!path + !!fd + !!host) > 1) { 1436 error_setg(errp, 1437 "None or one of 'path', 'fd' or 'host' option required."); 1438 return; 1439 } 1440 1441 if (host && !port) { 1442 error_setg(errp, "chardev: socket: no port given"); 1443 return; 1444 } 1445 1446 backend->type = CHARDEV_BACKEND_KIND_SOCKET; 1447 sock = backend->u.socket.data = g_new0(ChardevSocket, 1); 1448 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock)); 1449 1450 if (qemu_opt_get(opts, "delay") && qemu_opt_get(opts, "nodelay")) { 1451 error_setg(errp, "'delay' and 'nodelay' are mutually exclusive"); 1452 return; 1453 } 1454 sock->has_nodelay = 1455 qemu_opt_get(opts, "delay") || 1456 qemu_opt_get(opts, "nodelay"); 1457 sock->nodelay = 1458 !qemu_opt_get_bool(opts, "delay", true) || 1459 qemu_opt_get_bool(opts, "nodelay", false); 1460 1461 /* 1462 * We have different default to QMP for 'server', hence 1463 * we can't just check for existence of 'server' 1464 */ 1465 sock->has_server = true; 1466 sock->server = qemu_opt_get_bool(opts, "server", false); 1467 sock->has_telnet = qemu_opt_get(opts, "telnet"); 1468 sock->telnet = qemu_opt_get_bool(opts, "telnet", false); 1469 sock->has_tn3270 = qemu_opt_get(opts, "tn3270"); 1470 sock->tn3270 = qemu_opt_get_bool(opts, "tn3270", false); 1471 sock->has_websocket = qemu_opt_get(opts, "websocket"); 1472 sock->websocket = qemu_opt_get_bool(opts, "websocket", false); 1473 /* 1474 * We have different default to QMP for 'wait' when 'server' 1475 * is set, hence we can't just check for existence of 'wait' 1476 */ 1477 sock->has_wait = qemu_opt_find(opts, "wait") || sock->server; 1478 sock->wait = qemu_opt_get_bool(opts, "wait", true); 1479 sock->has_reconnect = qemu_opt_find(opts, "reconnect"); 1480 sock->reconnect = qemu_opt_get_number(opts, "reconnect", 0); 1481 sock->tls_creds = g_strdup(qemu_opt_get(opts, "tls-creds")); 1482 sock->tls_authz = g_strdup(qemu_opt_get(opts, "tls-authz")); 1483 1484 addr = g_new0(SocketAddressLegacy, 1); 1485 if (path) { 1486 UnixSocketAddress *q_unix; 1487 addr->type = SOCKET_ADDRESS_TYPE_UNIX; 1488 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 1489 q_unix->path = g_strdup(path); 1490 #ifdef CONFIG_LINUX 1491 q_unix->has_tight = true; 1492 q_unix->tight = tight; 1493 q_unix->has_abstract = true; 1494 q_unix->abstract = abstract; 1495 #endif 1496 } else if (host) { 1497 addr->type = SOCKET_ADDRESS_TYPE_INET; 1498 addr->u.inet.data = g_new(InetSocketAddress, 1); 1499 *addr->u.inet.data = (InetSocketAddress) { 1500 .host = g_strdup(host), 1501 .port = g_strdup(port), 1502 .has_to = qemu_opt_get(opts, "to"), 1503 .to = qemu_opt_get_number(opts, "to", 0), 1504 .has_ipv4 = qemu_opt_get(opts, "ipv4"), 1505 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), 1506 .has_ipv6 = qemu_opt_get(opts, "ipv6"), 1507 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), 1508 }; 1509 } else { 1510 addr->type = SOCKET_ADDRESS_TYPE_FD; 1511 addr->u.fd.data = g_new(FdSocketAddress, 1); 1512 addr->u.fd.data->str = g_strdup(fd); 1513 } 1514 sock->addr = addr; 1515 } 1516 1517 static void 1518 char_socket_get_addr(Object *obj, Visitor *v, const char *name, 1519 void *opaque, Error **errp) 1520 { 1521 SocketChardev *s = SOCKET_CHARDEV(obj); 1522 1523 visit_type_SocketAddress(v, name, &s->addr, errp); 1524 } 1525 1526 static bool 1527 char_socket_get_connected(Object *obj, Error **errp) 1528 { 1529 SocketChardev *s = SOCKET_CHARDEV(obj); 1530 1531 return s->state == TCP_CHARDEV_STATE_CONNECTED; 1532 } 1533 1534 static void char_socket_class_init(ObjectClass *oc, void *data) 1535 { 1536 ChardevClass *cc = CHARDEV_CLASS(oc); 1537 1538 cc->supports_yank = true; 1539 1540 cc->parse = qemu_chr_parse_socket; 1541 cc->open = qmp_chardev_open_socket; 1542 cc->chr_wait_connected = tcp_chr_wait_connected; 1543 cc->chr_write = tcp_chr_write; 1544 cc->chr_sync_read = tcp_chr_sync_read; 1545 cc->chr_disconnect = tcp_chr_disconnect; 1546 cc->get_msgfds = tcp_get_msgfds; 1547 cc->set_msgfds = tcp_set_msgfds; 1548 cc->chr_add_client = tcp_chr_add_client; 1549 cc->chr_add_watch = tcp_chr_add_watch; 1550 cc->chr_update_read_handler = tcp_chr_update_read_handler; 1551 1552 object_class_property_add(oc, "addr", "SocketAddress", 1553 char_socket_get_addr, NULL, 1554 NULL, NULL); 1555 1556 object_class_property_add_bool(oc, "connected", char_socket_get_connected, 1557 NULL); 1558 } 1559 1560 static const TypeInfo char_socket_type_info = { 1561 .name = TYPE_CHARDEV_SOCKET, 1562 .parent = TYPE_CHARDEV, 1563 .instance_size = sizeof(SocketChardev), 1564 .instance_finalize = char_socket_finalize, 1565 .class_init = char_socket_class_init, 1566 }; 1567 1568 static void register_types(void) 1569 { 1570 type_register_static(&char_socket_type_info); 1571 } 1572 1573 type_init(register_types); 1574