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-tls.h" 29 #include "io/channel-websock.h" 30 #include "io/net-listener.h" 31 #include "qemu/error-report.h" 32 #include "qemu/module.h" 33 #include "qemu/option.h" 34 #include "qapi/error.h" 35 #include "qapi/clone-visitor.h" 36 #include "qapi/qapi-visit-sockets.h" 37 #include "qemu/yank.h" 38 39 #include "chardev/char-io.h" 40 #include "qom/object.h" 41 42 /***********************************************************/ 43 /* TCP Net console */ 44 45 #define TCP_MAX_FDS 16 46 47 typedef struct { 48 char buf[21]; 49 size_t buflen; 50 } TCPChardevTelnetInit; 51 52 typedef enum { 53 TCP_CHARDEV_STATE_DISCONNECTED, 54 TCP_CHARDEV_STATE_CONNECTING, 55 TCP_CHARDEV_STATE_CONNECTED, 56 } TCPChardevState; 57 58 struct SocketChardev { 59 Chardev parent; 60 QIOChannel *ioc; /* Client I/O channel */ 61 QIOChannelSocket *sioc; /* Client master channel */ 62 QIONetListener *listener; 63 GSource *hup_source; 64 QCryptoTLSCreds *tls_creds; 65 char *tls_authz; 66 TCPChardevState state; 67 int max_size; 68 int do_telnetopt; 69 int do_nodelay; 70 int *read_msgfds; 71 size_t read_msgfds_num; 72 int *write_msgfds; 73 size_t write_msgfds_num; 74 bool registered_yank; 75 76 SocketAddress *addr; 77 bool is_listen; 78 bool is_telnet; 79 bool is_tn3270; 80 GSource *telnet_source; 81 TCPChardevTelnetInit *telnet_init; 82 83 bool is_websock; 84 85 GSource *reconnect_timer; 86 int64_t reconnect_time; 87 bool connect_err_reported; 88 89 QIOTask *connect_task; 90 }; 91 typedef struct SocketChardev SocketChardev; 92 93 DECLARE_INSTANCE_CHECKER(SocketChardev, SOCKET_CHARDEV, 94 TYPE_CHARDEV_SOCKET) 95 96 static gboolean socket_reconnect_timeout(gpointer opaque); 97 static void tcp_chr_telnet_init(Chardev *chr); 98 99 static void tcp_chr_change_state(SocketChardev *s, TCPChardevState state) 100 { 101 switch (state) { 102 case TCP_CHARDEV_STATE_DISCONNECTED: 103 break; 104 case TCP_CHARDEV_STATE_CONNECTING: 105 assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED); 106 break; 107 case TCP_CHARDEV_STATE_CONNECTED: 108 assert(s->state == TCP_CHARDEV_STATE_CONNECTING); 109 break; 110 } 111 s->state = state; 112 } 113 114 static void tcp_chr_reconn_timer_cancel(SocketChardev *s) 115 { 116 if (s->reconnect_timer) { 117 g_source_destroy(s->reconnect_timer); 118 g_source_unref(s->reconnect_timer); 119 s->reconnect_timer = NULL; 120 } 121 } 122 123 static void qemu_chr_socket_restart_timer(Chardev *chr) 124 { 125 SocketChardev *s = SOCKET_CHARDEV(chr); 126 char *name; 127 128 assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED); 129 assert(!s->reconnect_timer); 130 name = g_strdup_printf("chardev-socket-reconnect-%s", chr->label); 131 s->reconnect_timer = qemu_chr_timeout_add_ms(chr, 132 s->reconnect_time * 1000, 133 socket_reconnect_timeout, 134 chr); 135 g_source_set_name(s->reconnect_timer, name); 136 g_free(name); 137 } 138 139 static void check_report_connect_error(Chardev *chr, 140 Error *err) 141 { 142 SocketChardev *s = SOCKET_CHARDEV(chr); 143 144 if (!s->connect_err_reported) { 145 error_reportf_err(err, 146 "Unable to connect character device %s: ", 147 chr->label); 148 s->connect_err_reported = true; 149 } else { 150 error_free(err); 151 } 152 qemu_chr_socket_restart_timer(chr); 153 } 154 155 static void tcp_chr_accept(QIONetListener *listener, 156 QIOChannelSocket *cioc, 157 void *opaque); 158 159 static int tcp_chr_read_poll(void *opaque); 160 static void tcp_chr_disconnect_locked(Chardev *chr); 161 162 /* Called with chr_write_lock held. */ 163 static int tcp_chr_write(Chardev *chr, const uint8_t *buf, int len) 164 { 165 SocketChardev *s = SOCKET_CHARDEV(chr); 166 167 if (s->state == TCP_CHARDEV_STATE_CONNECTED) { 168 int ret = io_channel_send_full(s->ioc, buf, len, 169 s->write_msgfds, 170 s->write_msgfds_num); 171 172 /* free the written msgfds in any cases 173 * other than ret < 0 && errno == EAGAIN 174 */ 175 if (!(ret < 0 && EAGAIN == errno) 176 && s->write_msgfds_num) { 177 g_free(s->write_msgfds); 178 s->write_msgfds = 0; 179 s->write_msgfds_num = 0; 180 } 181 182 if (ret < 0 && errno != EAGAIN) { 183 if (tcp_chr_read_poll(chr) <= 0) { 184 /* Perform disconnect and return error. */ 185 tcp_chr_disconnect_locked(chr); 186 } /* else let the read handler finish it properly */ 187 } 188 189 return ret; 190 } else { 191 /* Indicate an error. */ 192 errno = EIO; 193 return -1; 194 } 195 } 196 197 static int tcp_chr_read_poll(void *opaque) 198 { 199 Chardev *chr = CHARDEV(opaque); 200 SocketChardev *s = SOCKET_CHARDEV(opaque); 201 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 202 return 0; 203 } 204 s->max_size = qemu_chr_be_can_write(chr); 205 return s->max_size; 206 } 207 208 static void tcp_chr_process_IAC_bytes(Chardev *chr, 209 SocketChardev *s, 210 uint8_t *buf, int *size) 211 { 212 /* Handle any telnet or tn3270 client's basic IAC options. 213 * For telnet options, it satisfies char by char mode with no echo. 214 * For tn3270 options, it satisfies binary mode with EOR. 215 * All IAC options will be removed from the buf and the do_opt 216 * pointer will be used to track the state of the width of the 217 * IAC information. 218 * 219 * RFC854: "All TELNET commands consist of at least a two byte sequence. 220 * The commands dealing with option negotiation are three byte sequences, 221 * the third byte being the code for the option referenced." 222 * "IAC BREAK", "IAC IP", "IAC NOP" and the double IAC are two bytes. 223 * "IAC SB", "IAC SE" and "IAC EOR" are saved to split up data boundary 224 * for tn3270. 225 * NOP, Break and Interrupt Process(IP) might be encountered during a TN3270 226 * session, and NOP and IP need to be done later. 227 */ 228 229 int i; 230 int j = 0; 231 232 for (i = 0; i < *size; i++) { 233 if (s->do_telnetopt > 1) { 234 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) { 235 /* Double IAC means send an IAC */ 236 if (j != i) { 237 buf[j] = buf[i]; 238 } 239 j++; 240 s->do_telnetopt = 1; 241 } else { 242 if ((unsigned char)buf[i] == IAC_BREAK 243 && s->do_telnetopt == 2) { 244 /* Handle IAC break commands by sending a serial break */ 245 qemu_chr_be_event(chr, CHR_EVENT_BREAK); 246 s->do_telnetopt++; 247 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_EOR 248 || (unsigned char)buf[i] == IAC_SB 249 || (unsigned char)buf[i] == IAC_SE) 250 && s->do_telnetopt == 2) { 251 buf[j++] = IAC; 252 buf[j++] = buf[i]; 253 s->do_telnetopt++; 254 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_IP 255 || (unsigned char)buf[i] == IAC_NOP) 256 && s->do_telnetopt == 2) { 257 /* TODO: IP and NOP need to be implemented later. */ 258 s->do_telnetopt++; 259 } 260 s->do_telnetopt++; 261 } 262 if (s->do_telnetopt >= 4) { 263 s->do_telnetopt = 1; 264 } 265 } else { 266 if ((unsigned char)buf[i] == IAC) { 267 s->do_telnetopt = 2; 268 } else { 269 if (j != i) { 270 buf[j] = buf[i]; 271 } 272 j++; 273 } 274 } 275 } 276 *size = j; 277 } 278 279 static int tcp_get_msgfds(Chardev *chr, int *fds, int num) 280 { 281 SocketChardev *s = SOCKET_CHARDEV(chr); 282 283 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num; 284 285 assert(num <= TCP_MAX_FDS); 286 287 if (to_copy) { 288 int i; 289 290 memcpy(fds, s->read_msgfds, to_copy * sizeof(int)); 291 292 /* Close unused fds */ 293 for (i = to_copy; i < s->read_msgfds_num; i++) { 294 close(s->read_msgfds[i]); 295 } 296 297 g_free(s->read_msgfds); 298 s->read_msgfds = 0; 299 s->read_msgfds_num = 0; 300 } 301 302 return to_copy; 303 } 304 305 static int tcp_set_msgfds(Chardev *chr, int *fds, int num) 306 { 307 SocketChardev *s = SOCKET_CHARDEV(chr); 308 309 /* clear old pending fd array */ 310 g_free(s->write_msgfds); 311 s->write_msgfds = NULL; 312 s->write_msgfds_num = 0; 313 314 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) || 315 !qio_channel_has_feature(s->ioc, 316 QIO_CHANNEL_FEATURE_FD_PASS)) { 317 return -1; 318 } 319 320 if (num) { 321 s->write_msgfds = g_new(int, num); 322 memcpy(s->write_msgfds, fds, num * sizeof(int)); 323 } 324 325 s->write_msgfds_num = num; 326 327 return 0; 328 } 329 330 static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len) 331 { 332 SocketChardev *s = SOCKET_CHARDEV(chr); 333 struct iovec iov = { .iov_base = buf, .iov_len = len }; 334 int ret; 335 size_t i; 336 int *msgfds = NULL; 337 size_t msgfds_num = 0; 338 339 if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) { 340 ret = qio_channel_readv_full(s->ioc, &iov, 1, 341 &msgfds, &msgfds_num, 342 NULL); 343 } else { 344 ret = qio_channel_readv_full(s->ioc, &iov, 1, 345 NULL, NULL, 346 NULL); 347 } 348 349 if (ret == QIO_CHANNEL_ERR_BLOCK) { 350 errno = EAGAIN; 351 ret = -1; 352 } else if (ret == -1) { 353 errno = EIO; 354 } 355 356 if (msgfds_num) { 357 /* close and clean read_msgfds */ 358 for (i = 0; i < s->read_msgfds_num; i++) { 359 close(s->read_msgfds[i]); 360 } 361 362 if (s->read_msgfds_num) { 363 g_free(s->read_msgfds); 364 } 365 366 s->read_msgfds = msgfds; 367 s->read_msgfds_num = msgfds_num; 368 } 369 370 for (i = 0; i < s->read_msgfds_num; i++) { 371 int fd = s->read_msgfds[i]; 372 if (fd < 0) { 373 continue; 374 } 375 376 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */ 377 qemu_set_block(fd); 378 379 #ifndef MSG_CMSG_CLOEXEC 380 qemu_set_cloexec(fd); 381 #endif 382 } 383 384 return ret; 385 } 386 387 static GSource *tcp_chr_add_watch(Chardev *chr, GIOCondition cond) 388 { 389 SocketChardev *s = SOCKET_CHARDEV(chr); 390 return qio_channel_create_watch(s->ioc, cond); 391 } 392 393 static void remove_hup_source(SocketChardev *s) 394 { 395 if (s->hup_source != NULL) { 396 g_source_destroy(s->hup_source); 397 g_source_unref(s->hup_source); 398 s->hup_source = NULL; 399 } 400 } 401 402 static void tcp_chr_free_connection(Chardev *chr) 403 { 404 SocketChardev *s = SOCKET_CHARDEV(chr); 405 int i; 406 407 if (s->read_msgfds_num) { 408 for (i = 0; i < s->read_msgfds_num; i++) { 409 close(s->read_msgfds[i]); 410 } 411 g_free(s->read_msgfds); 412 s->read_msgfds = NULL; 413 s->read_msgfds_num = 0; 414 } 415 416 remove_hup_source(s); 417 418 tcp_set_msgfds(chr, NULL, 0); 419 remove_fd_in_watch(chr); 420 if (s->registered_yank && 421 (s->state == TCP_CHARDEV_STATE_CONNECTING 422 || s->state == TCP_CHARDEV_STATE_CONNECTED)) { 423 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 424 yank_generic_iochannel, 425 QIO_CHANNEL(s->sioc)); 426 } 427 object_unref(OBJECT(s->sioc)); 428 s->sioc = NULL; 429 object_unref(OBJECT(s->ioc)); 430 s->ioc = NULL; 431 g_free(chr->filename); 432 chr->filename = NULL; 433 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 434 } 435 436 static const char *qemu_chr_socket_protocol(SocketChardev *s) 437 { 438 if (s->is_telnet) { 439 return "telnet"; 440 } 441 return s->is_websock ? "websocket" : "tcp"; 442 } 443 444 static char *qemu_chr_socket_address(SocketChardev *s, const char *prefix) 445 { 446 switch (s->addr->type) { 447 case SOCKET_ADDRESS_TYPE_INET: 448 return g_strdup_printf("%s%s:%s:%s%s", prefix, 449 qemu_chr_socket_protocol(s), 450 s->addr->u.inet.host, 451 s->addr->u.inet.port, 452 s->is_listen ? ",server" : ""); 453 break; 454 case SOCKET_ADDRESS_TYPE_UNIX: 455 { 456 const char *tight = "", *abstract = ""; 457 UnixSocketAddress *sa = &s->addr->u.q_unix; 458 459 #ifdef CONFIG_LINUX 460 if (sa->has_abstract && sa->abstract) { 461 abstract = ",abstract"; 462 if (sa->has_tight && sa->tight) { 463 tight = ",tight"; 464 } 465 } 466 #endif 467 468 return g_strdup_printf("%sunix:%s%s%s%s", prefix, sa->path, 469 abstract, tight, 470 s->is_listen ? ",server" : ""); 471 break; 472 } 473 case SOCKET_ADDRESS_TYPE_FD: 474 return g_strdup_printf("%sfd:%s%s", prefix, s->addr->u.fd.str, 475 s->is_listen ? ",server" : ""); 476 break; 477 case SOCKET_ADDRESS_TYPE_VSOCK: 478 return g_strdup_printf("%svsock:%s:%s", prefix, 479 s->addr->u.vsock.cid, 480 s->addr->u.vsock.port); 481 default: 482 abort(); 483 } 484 } 485 486 static void update_disconnected_filename(SocketChardev *s) 487 { 488 Chardev *chr = CHARDEV(s); 489 490 g_free(chr->filename); 491 if (s->addr) { 492 chr->filename = qemu_chr_socket_address(s, "disconnected:"); 493 } else { 494 chr->filename = g_strdup("disconnected:socket"); 495 } 496 } 497 498 /* NB may be called even if tcp_chr_connect has not been 499 * reached, due to TLS or telnet initialization failure, 500 * so can *not* assume s->state == TCP_CHARDEV_STATE_CONNECTED 501 * This must be called with chr->chr_write_lock held. 502 */ 503 static void tcp_chr_disconnect_locked(Chardev *chr) 504 { 505 SocketChardev *s = SOCKET_CHARDEV(chr); 506 bool emit_close = s->state == TCP_CHARDEV_STATE_CONNECTED; 507 508 tcp_chr_free_connection(chr); 509 510 if (s->listener) { 511 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 512 chr, NULL, chr->gcontext); 513 } 514 update_disconnected_filename(s); 515 if (emit_close) { 516 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 517 } 518 if (s->reconnect_time && !s->reconnect_timer) { 519 qemu_chr_socket_restart_timer(chr); 520 } 521 } 522 523 static void tcp_chr_disconnect(Chardev *chr) 524 { 525 qemu_mutex_lock(&chr->chr_write_lock); 526 tcp_chr_disconnect_locked(chr); 527 qemu_mutex_unlock(&chr->chr_write_lock); 528 } 529 530 static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) 531 { 532 Chardev *chr = CHARDEV(opaque); 533 SocketChardev *s = SOCKET_CHARDEV(opaque); 534 uint8_t buf[CHR_READ_BUF_LEN]; 535 int len, size; 536 537 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) || 538 s->max_size <= 0) { 539 return TRUE; 540 } 541 len = sizeof(buf); 542 if (len > s->max_size) { 543 len = s->max_size; 544 } 545 size = tcp_chr_recv(chr, (void *)buf, len); 546 if (size == 0 || (size == -1 && errno != EAGAIN)) { 547 /* connection closed */ 548 tcp_chr_disconnect(chr); 549 } else if (size > 0) { 550 if (s->do_telnetopt) { 551 tcp_chr_process_IAC_bytes(chr, s, buf, &size); 552 } 553 if (size > 0) { 554 qemu_chr_be_write(chr, buf, size); 555 } 556 } 557 558 return TRUE; 559 } 560 561 static gboolean tcp_chr_hup(QIOChannel *channel, 562 GIOCondition cond, 563 void *opaque) 564 { 565 Chardev *chr = CHARDEV(opaque); 566 tcp_chr_disconnect(chr); 567 return G_SOURCE_REMOVE; 568 } 569 570 static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len) 571 { 572 SocketChardev *s = SOCKET_CHARDEV(chr); 573 int size; 574 575 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 576 return 0; 577 } 578 579 qio_channel_set_blocking(s->ioc, true, NULL); 580 size = tcp_chr_recv(chr, (void *) buf, len); 581 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 582 qio_channel_set_blocking(s->ioc, false, NULL); 583 } 584 if (size == 0) { 585 /* connection closed */ 586 tcp_chr_disconnect(chr); 587 } 588 589 return size; 590 } 591 592 static char *qemu_chr_compute_filename(SocketChardev *s) 593 { 594 struct sockaddr_storage *ss = &s->sioc->localAddr; 595 struct sockaddr_storage *ps = &s->sioc->remoteAddr; 596 socklen_t ss_len = s->sioc->localAddrLen; 597 socklen_t ps_len = s->sioc->remoteAddrLen; 598 char shost[NI_MAXHOST], sserv[NI_MAXSERV]; 599 char phost[NI_MAXHOST], pserv[NI_MAXSERV]; 600 const char *left = "", *right = ""; 601 602 switch (ss->ss_family) { 603 #ifndef _WIN32 604 case AF_UNIX: 605 return g_strdup_printf("unix:%s%s", 606 ((struct sockaddr_un *)(ss))->sun_path, 607 s->is_listen ? ",server" : ""); 608 #endif 609 case AF_INET6: 610 left = "["; 611 right = "]"; 612 /* fall through */ 613 case AF_INET: 614 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost), 615 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV); 616 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost), 617 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV); 618 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s", 619 qemu_chr_socket_protocol(s), 620 left, shost, right, sserv, 621 s->is_listen ? ",server" : "", 622 left, phost, right, pserv); 623 624 default: 625 return g_strdup_printf("unknown"); 626 } 627 } 628 629 static void update_ioc_handlers(SocketChardev *s) 630 { 631 Chardev *chr = CHARDEV(s); 632 633 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 634 return; 635 } 636 637 remove_fd_in_watch(chr); 638 chr->gsource = io_add_watch_poll(chr, s->ioc, 639 tcp_chr_read_poll, 640 tcp_chr_read, chr, 641 chr->gcontext); 642 643 remove_hup_source(s); 644 s->hup_source = qio_channel_create_watch(s->ioc, G_IO_HUP); 645 g_source_set_callback(s->hup_source, (GSourceFunc)tcp_chr_hup, 646 chr, NULL); 647 g_source_attach(s->hup_source, chr->gcontext); 648 } 649 650 static void tcp_chr_connect(void *opaque) 651 { 652 Chardev *chr = CHARDEV(opaque); 653 SocketChardev *s = SOCKET_CHARDEV(opaque); 654 655 g_free(chr->filename); 656 chr->filename = qemu_chr_compute_filename(s); 657 658 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTED); 659 update_ioc_handlers(s); 660 qemu_chr_be_event(chr, CHR_EVENT_OPENED); 661 } 662 663 static void tcp_chr_telnet_destroy(SocketChardev *s) 664 { 665 if (s->telnet_source) { 666 g_source_destroy(s->telnet_source); 667 g_source_unref(s->telnet_source); 668 s->telnet_source = NULL; 669 } 670 } 671 672 static void tcp_chr_update_read_handler(Chardev *chr) 673 { 674 SocketChardev *s = SOCKET_CHARDEV(chr); 675 676 if (s->listener && s->state == TCP_CHARDEV_STATE_DISCONNECTED) { 677 /* 678 * It's possible that chardev context is changed in 679 * qemu_chr_be_update_read_handlers(). Reset it for QIO net 680 * listener if there is. 681 */ 682 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 683 chr, NULL, chr->gcontext); 684 } 685 686 if (s->telnet_source) { 687 tcp_chr_telnet_init(CHARDEV(s)); 688 } 689 690 update_ioc_handlers(s); 691 } 692 693 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, 694 GIOCondition cond G_GNUC_UNUSED, 695 gpointer user_data) 696 { 697 SocketChardev *s = user_data; 698 Chardev *chr = CHARDEV(s); 699 TCPChardevTelnetInit *init = s->telnet_init; 700 ssize_t ret; 701 702 assert(init); 703 704 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL); 705 if (ret < 0) { 706 if (ret == QIO_CHANNEL_ERR_BLOCK) { 707 ret = 0; 708 } else { 709 tcp_chr_disconnect(chr); 710 goto end; 711 } 712 } 713 init->buflen -= ret; 714 715 if (init->buflen == 0) { 716 tcp_chr_connect(chr); 717 goto end; 718 } 719 720 memmove(init->buf, init->buf + ret, init->buflen); 721 722 return G_SOURCE_CONTINUE; 723 724 end: 725 g_free(s->telnet_init); 726 s->telnet_init = NULL; 727 g_source_unref(s->telnet_source); 728 s->telnet_source = NULL; 729 return G_SOURCE_REMOVE; 730 } 731 732 static void tcp_chr_telnet_init(Chardev *chr) 733 { 734 SocketChardev *s = SOCKET_CHARDEV(chr); 735 TCPChardevTelnetInit *init; 736 size_t n = 0; 737 738 /* Destroy existing task */ 739 tcp_chr_telnet_destroy(s); 740 741 if (s->telnet_init) { 742 /* We are possibly during a handshake already */ 743 goto cont; 744 } 745 746 s->telnet_init = g_new0(TCPChardevTelnetInit, 1); 747 init = s->telnet_init; 748 749 #define IACSET(x, a, b, c) \ 750 do { \ 751 x[n++] = a; \ 752 x[n++] = b; \ 753 x[n++] = c; \ 754 } while (0) 755 756 if (!s->is_tn3270) { 757 init->buflen = 12; 758 /* Prep the telnet negotion to put telnet in binary, 759 * no echo, single char mode */ 760 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ 761 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ 762 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ 763 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ 764 } else { 765 init->buflen = 21; 766 /* Prep the TN3270 negotion based on RFC1576 */ 767 IACSET(init->buf, 0xff, 0xfd, 0x19); /* IAC DO EOR */ 768 IACSET(init->buf, 0xff, 0xfb, 0x19); /* IAC WILL EOR */ 769 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO BINARY */ 770 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL BINARY */ 771 IACSET(init->buf, 0xff, 0xfd, 0x18); /* IAC DO TERMINAL TYPE */ 772 IACSET(init->buf, 0xff, 0xfa, 0x18); /* IAC SB TERMINAL TYPE */ 773 IACSET(init->buf, 0x01, 0xff, 0xf0); /* SEND IAC SE */ 774 } 775 776 #undef IACSET 777 778 cont: 779 s->telnet_source = qio_channel_add_watch_source(s->ioc, G_IO_OUT, 780 tcp_chr_telnet_init_io, 781 s, NULL, 782 chr->gcontext); 783 } 784 785 786 static void tcp_chr_websock_handshake(QIOTask *task, gpointer user_data) 787 { 788 Chardev *chr = user_data; 789 SocketChardev *s = user_data; 790 791 if (qio_task_propagate_error(task, NULL)) { 792 tcp_chr_disconnect(chr); 793 } else { 794 if (s->do_telnetopt) { 795 tcp_chr_telnet_init(chr); 796 } else { 797 tcp_chr_connect(chr); 798 } 799 } 800 } 801 802 803 static void tcp_chr_websock_init(Chardev *chr) 804 { 805 SocketChardev *s = SOCKET_CHARDEV(chr); 806 QIOChannelWebsock *wioc = NULL; 807 gchar *name; 808 809 wioc = qio_channel_websock_new_server(s->ioc); 810 811 name = g_strdup_printf("chardev-websocket-server-%s", chr->label); 812 qio_channel_set_name(QIO_CHANNEL(wioc), name); 813 g_free(name); 814 object_unref(OBJECT(s->ioc)); 815 s->ioc = QIO_CHANNEL(wioc); 816 817 qio_channel_websock_handshake(wioc, tcp_chr_websock_handshake, chr, NULL); 818 } 819 820 821 static void tcp_chr_tls_handshake(QIOTask *task, 822 gpointer user_data) 823 { 824 Chardev *chr = user_data; 825 SocketChardev *s = user_data; 826 827 if (qio_task_propagate_error(task, NULL)) { 828 tcp_chr_disconnect(chr); 829 } else { 830 if (s->is_websock) { 831 tcp_chr_websock_init(chr); 832 } else if (s->do_telnetopt) { 833 tcp_chr_telnet_init(chr); 834 } else { 835 tcp_chr_connect(chr); 836 } 837 } 838 } 839 840 841 static void tcp_chr_tls_init(Chardev *chr) 842 { 843 SocketChardev *s = SOCKET_CHARDEV(chr); 844 QIOChannelTLS *tioc; 845 gchar *name; 846 847 if (s->is_listen) { 848 tioc = qio_channel_tls_new_server( 849 s->ioc, s->tls_creds, 850 s->tls_authz, 851 NULL); 852 } else { 853 tioc = qio_channel_tls_new_client( 854 s->ioc, s->tls_creds, 855 s->addr->u.inet.host, 856 NULL); 857 } 858 if (tioc == NULL) { 859 tcp_chr_disconnect(chr); 860 return; 861 } 862 name = g_strdup_printf("chardev-tls-%s-%s", 863 s->is_listen ? "server" : "client", 864 chr->label); 865 qio_channel_set_name(QIO_CHANNEL(tioc), name); 866 g_free(name); 867 object_unref(OBJECT(s->ioc)); 868 s->ioc = QIO_CHANNEL(tioc); 869 870 qio_channel_tls_handshake(tioc, 871 tcp_chr_tls_handshake, 872 chr, 873 NULL, 874 chr->gcontext); 875 } 876 877 878 static void tcp_chr_set_client_ioc_name(Chardev *chr, 879 QIOChannelSocket *sioc) 880 { 881 SocketChardev *s = SOCKET_CHARDEV(chr); 882 char *name; 883 name = g_strdup_printf("chardev-tcp-%s-%s", 884 s->is_listen ? "server" : "client", 885 chr->label); 886 qio_channel_set_name(QIO_CHANNEL(sioc), name); 887 g_free(name); 888 889 } 890 891 static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc) 892 { 893 SocketChardev *s = SOCKET_CHARDEV(chr); 894 895 if (s->state != TCP_CHARDEV_STATE_CONNECTING) { 896 return -1; 897 } 898 899 s->ioc = QIO_CHANNEL(sioc); 900 object_ref(OBJECT(sioc)); 901 s->sioc = sioc; 902 object_ref(OBJECT(sioc)); 903 904 qio_channel_set_blocking(s->ioc, false, NULL); 905 906 if (s->do_nodelay) { 907 qio_channel_set_delay(s->ioc, false); 908 } 909 if (s->listener) { 910 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 911 NULL, chr->gcontext); 912 } 913 914 if (s->tls_creds) { 915 tcp_chr_tls_init(chr); 916 } else if (s->is_websock) { 917 tcp_chr_websock_init(chr); 918 } else if (s->do_telnetopt) { 919 tcp_chr_telnet_init(chr); 920 } else { 921 tcp_chr_connect(chr); 922 } 923 924 return 0; 925 } 926 927 928 static int tcp_chr_add_client(Chardev *chr, int fd) 929 { 930 int ret; 931 QIOChannelSocket *sioc; 932 SocketChardev *s = SOCKET_CHARDEV(chr); 933 934 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 935 return -1; 936 } 937 938 sioc = qio_channel_socket_new_fd(fd, NULL); 939 if (!sioc) { 940 return -1; 941 } 942 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 943 tcp_chr_set_client_ioc_name(chr, sioc); 944 if (s->registered_yank) { 945 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 946 yank_generic_iochannel, 947 QIO_CHANNEL(sioc)); 948 } 949 ret = tcp_chr_new_client(chr, sioc); 950 object_unref(OBJECT(sioc)); 951 return ret; 952 } 953 954 static void tcp_chr_accept(QIONetListener *listener, 955 QIOChannelSocket *cioc, 956 void *opaque) 957 { 958 Chardev *chr = CHARDEV(opaque); 959 SocketChardev *s = SOCKET_CHARDEV(chr); 960 961 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 962 tcp_chr_set_client_ioc_name(chr, cioc); 963 if (s->registered_yank) { 964 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 965 yank_generic_iochannel, 966 QIO_CHANNEL(cioc)); 967 } 968 tcp_chr_new_client(chr, cioc); 969 } 970 971 972 static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp) 973 { 974 SocketChardev *s = SOCKET_CHARDEV(chr); 975 QIOChannelSocket *sioc = qio_channel_socket_new(); 976 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 977 tcp_chr_set_client_ioc_name(chr, sioc); 978 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) { 979 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 980 object_unref(OBJECT(sioc)); 981 return -1; 982 } 983 if (s->registered_yank) { 984 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 985 yank_generic_iochannel, 986 QIO_CHANNEL(sioc)); 987 } 988 tcp_chr_new_client(chr, sioc); 989 object_unref(OBJECT(sioc)); 990 return 0; 991 } 992 993 994 static void tcp_chr_accept_server_sync(Chardev *chr) 995 { 996 SocketChardev *s = SOCKET_CHARDEV(chr); 997 QIOChannelSocket *sioc; 998 info_report("QEMU waiting for connection on: %s", 999 chr->filename); 1000 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 1001 sioc = qio_net_listener_wait_client(s->listener); 1002 tcp_chr_set_client_ioc_name(chr, sioc); 1003 if (s->registered_yank) { 1004 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 1005 yank_generic_iochannel, 1006 QIO_CHANNEL(sioc)); 1007 } 1008 tcp_chr_new_client(chr, sioc); 1009 object_unref(OBJECT(sioc)); 1010 } 1011 1012 1013 static int tcp_chr_wait_connected(Chardev *chr, Error **errp) 1014 { 1015 SocketChardev *s = SOCKET_CHARDEV(chr); 1016 const char *opts[] = { "telnet", "tn3270", "websock", "tls-creds" }; 1017 bool optset[] = { s->is_telnet, s->is_tn3270, s->is_websock, s->tls_creds }; 1018 size_t i; 1019 1020 QEMU_BUILD_BUG_ON(G_N_ELEMENTS(opts) != G_N_ELEMENTS(optset)); 1021 for (i = 0; i < G_N_ELEMENTS(opts); i++) { 1022 if (optset[i]) { 1023 error_setg(errp, 1024 "'%s' option is incompatible with waiting for " 1025 "connection completion", opts[i]); 1026 return -1; 1027 } 1028 } 1029 1030 tcp_chr_reconn_timer_cancel(s); 1031 1032 /* 1033 * We expect states to be as follows: 1034 * 1035 * - server 1036 * - wait -> CONNECTED 1037 * - nowait -> DISCONNECTED 1038 * - client 1039 * - reconnect == 0 -> CONNECTED 1040 * - reconnect != 0 -> CONNECTING 1041 * 1042 */ 1043 if (s->state == TCP_CHARDEV_STATE_CONNECTING) { 1044 if (!s->connect_task) { 1045 error_setg(errp, 1046 "Unexpected 'connecting' state without connect task " 1047 "while waiting for connection completion"); 1048 return -1; 1049 } 1050 /* 1051 * tcp_chr_wait_connected should only ever be run from the 1052 * main loop thread associated with chr->gcontext, otherwise 1053 * qio_task_wait_thread has a dangerous race condition with 1054 * free'ing of the s->connect_task object. 1055 * 1056 * Acquiring the main context doesn't 100% prove we're in 1057 * the main loop thread, but it does at least guarantee 1058 * that the main loop won't be executed by another thread 1059 * avoiding the race condition with the task idle callback. 1060 */ 1061 g_main_context_acquire(chr->gcontext); 1062 qio_task_wait_thread(s->connect_task); 1063 g_main_context_release(chr->gcontext); 1064 1065 /* 1066 * The completion callback (qemu_chr_socket_connected) for 1067 * s->connect_task should have set this to NULL by the time 1068 * qio_task_wait_thread has returned. 1069 */ 1070 assert(!s->connect_task); 1071 1072 /* 1073 * NB we are *not* guaranteed to have "s->state == ..CONNECTED" 1074 * at this point as this first connect may be failed, so 1075 * allow the next loop to run regardless. 1076 */ 1077 } 1078 1079 while (s->state != TCP_CHARDEV_STATE_CONNECTED) { 1080 if (s->is_listen) { 1081 tcp_chr_accept_server_sync(chr); 1082 } else { 1083 Error *err = NULL; 1084 if (tcp_chr_connect_client_sync(chr, &err) < 0) { 1085 if (s->reconnect_time) { 1086 error_free(err); 1087 g_usleep(s->reconnect_time * 1000ULL * 1000ULL); 1088 } else { 1089 error_propagate(errp, err); 1090 return -1; 1091 } 1092 } 1093 } 1094 } 1095 1096 return 0; 1097 } 1098 1099 static void char_socket_finalize(Object *obj) 1100 { 1101 Chardev *chr = CHARDEV(obj); 1102 SocketChardev *s = SOCKET_CHARDEV(obj); 1103 1104 tcp_chr_free_connection(chr); 1105 tcp_chr_reconn_timer_cancel(s); 1106 qapi_free_SocketAddress(s->addr); 1107 tcp_chr_telnet_destroy(s); 1108 g_free(s->telnet_init); 1109 if (s->listener) { 1110 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 1111 NULL, chr->gcontext); 1112 object_unref(OBJECT(s->listener)); 1113 } 1114 if (s->tls_creds) { 1115 object_unref(OBJECT(s->tls_creds)); 1116 } 1117 g_free(s->tls_authz); 1118 if (s->registered_yank) { 1119 yank_unregister_instance(CHARDEV_YANK_INSTANCE(chr->label)); 1120 } 1121 1122 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 1123 } 1124 1125 static void qemu_chr_socket_connected(QIOTask *task, void *opaque) 1126 { 1127 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1128 Chardev *chr = CHARDEV(opaque); 1129 SocketChardev *s = SOCKET_CHARDEV(chr); 1130 Error *err = NULL; 1131 1132 s->connect_task = NULL; 1133 1134 if (qio_task_propagate_error(task, &err)) { 1135 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 1136 if (s->registered_yank) { 1137 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 1138 yank_generic_iochannel, 1139 QIO_CHANNEL(sioc)); 1140 } 1141 check_report_connect_error(chr, err); 1142 goto cleanup; 1143 } 1144 1145 s->connect_err_reported = false; 1146 tcp_chr_new_client(chr, sioc); 1147 1148 cleanup: 1149 object_unref(OBJECT(sioc)); 1150 } 1151 1152 1153 static void tcp_chr_connect_client_task(QIOTask *task, 1154 gpointer opaque) 1155 { 1156 QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1157 SocketAddress *addr = opaque; 1158 Error *err = NULL; 1159 1160 qio_channel_socket_connect_sync(ioc, addr, &err); 1161 1162 qio_task_set_error(task, err); 1163 } 1164 1165 1166 static void tcp_chr_connect_client_async(Chardev *chr) 1167 { 1168 SocketChardev *s = SOCKET_CHARDEV(chr); 1169 QIOChannelSocket *sioc; 1170 1171 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 1172 sioc = qio_channel_socket_new(); 1173 tcp_chr_set_client_ioc_name(chr, sioc); 1174 if (s->registered_yank) { 1175 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 1176 yank_generic_iochannel, 1177 QIO_CHANNEL(sioc)); 1178 } 1179 /* 1180 * Normally code would use the qio_channel_socket_connect_async 1181 * method which uses a QIOTask + qio_task_set_error internally 1182 * to avoid blocking. The tcp_chr_wait_connected method, however, 1183 * needs a way to synchronize with completion of the background 1184 * connect task which can't be done with the QIOChannelSocket 1185 * async APIs. Thus we must use QIOTask directly to implement 1186 * the non-blocking concept locally. 1187 */ 1188 s->connect_task = qio_task_new(OBJECT(sioc), 1189 qemu_chr_socket_connected, 1190 object_ref(OBJECT(chr)), 1191 (GDestroyNotify)object_unref); 1192 qio_task_run_in_thread(s->connect_task, 1193 tcp_chr_connect_client_task, 1194 s->addr, 1195 NULL, 1196 chr->gcontext); 1197 } 1198 1199 static gboolean socket_reconnect_timeout(gpointer opaque) 1200 { 1201 Chardev *chr = CHARDEV(opaque); 1202 SocketChardev *s = SOCKET_CHARDEV(opaque); 1203 1204 qemu_mutex_lock(&chr->chr_write_lock); 1205 g_source_unref(s->reconnect_timer); 1206 s->reconnect_timer = NULL; 1207 qemu_mutex_unlock(&chr->chr_write_lock); 1208 1209 if (chr->be_open) { 1210 return false; 1211 } 1212 1213 tcp_chr_connect_client_async(chr); 1214 1215 return false; 1216 } 1217 1218 1219 static int qmp_chardev_open_socket_server(Chardev *chr, 1220 bool is_telnet, 1221 bool is_waitconnect, 1222 Error **errp) 1223 { 1224 SocketChardev *s = SOCKET_CHARDEV(chr); 1225 char *name; 1226 if (is_telnet) { 1227 s->do_telnetopt = 1; 1228 } 1229 s->listener = qio_net_listener_new(); 1230 1231 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label); 1232 qio_net_listener_set_name(s->listener, name); 1233 g_free(name); 1234 1235 if (qio_net_listener_open_sync(s->listener, s->addr, 1, errp) < 0) { 1236 object_unref(OBJECT(s->listener)); 1237 s->listener = NULL; 1238 return -1; 1239 } 1240 1241 qapi_free_SocketAddress(s->addr); 1242 s->addr = socket_local_address(s->listener->sioc[0]->fd, errp); 1243 update_disconnected_filename(s); 1244 1245 if (is_waitconnect) { 1246 tcp_chr_accept_server_sync(chr); 1247 } else { 1248 qio_net_listener_set_client_func_full(s->listener, 1249 tcp_chr_accept, 1250 chr, NULL, 1251 chr->gcontext); 1252 } 1253 1254 return 0; 1255 } 1256 1257 1258 static int qmp_chardev_open_socket_client(Chardev *chr, 1259 int64_t reconnect, 1260 Error **errp) 1261 { 1262 SocketChardev *s = SOCKET_CHARDEV(chr); 1263 1264 if (reconnect > 0) { 1265 s->reconnect_time = reconnect; 1266 tcp_chr_connect_client_async(chr); 1267 return 0; 1268 } else { 1269 return tcp_chr_connect_client_sync(chr, errp); 1270 } 1271 } 1272 1273 1274 static bool qmp_chardev_validate_socket(ChardevSocket *sock, 1275 SocketAddress *addr, 1276 Error **errp) 1277 { 1278 /* Validate any options which have a dependency on address type */ 1279 switch (addr->type) { 1280 case SOCKET_ADDRESS_TYPE_FD: 1281 if (sock->has_reconnect) { 1282 error_setg(errp, 1283 "'reconnect' option is incompatible with " 1284 "'fd' address type"); 1285 return false; 1286 } 1287 if (sock->has_tls_creds && 1288 !(sock->has_server && sock->server)) { 1289 error_setg(errp, 1290 "'tls_creds' option is incompatible with " 1291 "'fd' address type as client"); 1292 return false; 1293 } 1294 break; 1295 1296 case SOCKET_ADDRESS_TYPE_UNIX: 1297 if (sock->has_tls_creds) { 1298 error_setg(errp, 1299 "'tls_creds' option is incompatible with " 1300 "'unix' address type"); 1301 return false; 1302 } 1303 break; 1304 1305 case SOCKET_ADDRESS_TYPE_INET: 1306 break; 1307 1308 case SOCKET_ADDRESS_TYPE_VSOCK: 1309 if (sock->has_tls_creds) { 1310 error_setg(errp, 1311 "'tls_creds' option is incompatible with " 1312 "'vsock' address type"); 1313 return false; 1314 } 1315 1316 default: 1317 break; 1318 } 1319 1320 if (sock->has_tls_authz && !sock->has_tls_creds) { 1321 error_setg(errp, "'tls_authz' option requires 'tls_creds' option"); 1322 return false; 1323 } 1324 1325 /* Validate any options which have a dependancy on client vs server */ 1326 if (!sock->has_server || sock->server) { 1327 if (sock->has_reconnect) { 1328 error_setg(errp, 1329 "'reconnect' option is incompatible with " 1330 "socket in server listen mode"); 1331 return false; 1332 } 1333 } else { 1334 if (sock->has_websocket && sock->websocket) { 1335 error_setg(errp, "%s", "Websocket client is not implemented"); 1336 return false; 1337 } 1338 if (sock->has_wait) { 1339 warn_report("'wait' option is deprecated with " 1340 "socket in client connect mode"); 1341 if (sock->wait) { 1342 error_setg(errp, "%s", 1343 "'wait' option is incompatible with " 1344 "socket in client connect mode"); 1345 return false; 1346 } 1347 } 1348 } 1349 1350 return true; 1351 } 1352 1353 1354 static void qmp_chardev_open_socket(Chardev *chr, 1355 ChardevBackend *backend, 1356 bool *be_opened, 1357 Error **errp) 1358 { 1359 SocketChardev *s = SOCKET_CHARDEV(chr); 1360 ChardevSocket *sock = backend->u.socket.data; 1361 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false; 1362 bool is_listen = sock->has_server ? sock->server : true; 1363 bool is_telnet = sock->has_telnet ? sock->telnet : false; 1364 bool is_tn3270 = sock->has_tn3270 ? sock->tn3270 : false; 1365 bool is_waitconnect = sock->has_wait ? sock->wait : false; 1366 bool is_websock = sock->has_websocket ? sock->websocket : false; 1367 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; 1368 SocketAddress *addr; 1369 1370 s->is_listen = is_listen; 1371 s->is_telnet = is_telnet; 1372 s->is_tn3270 = is_tn3270; 1373 s->is_websock = is_websock; 1374 s->do_nodelay = do_nodelay; 1375 if (sock->tls_creds) { 1376 Object *creds; 1377 creds = object_resolve_path_component( 1378 object_get_objects_root(), sock->tls_creds); 1379 if (!creds) { 1380 error_setg(errp, "No TLS credentials with id '%s'", 1381 sock->tls_creds); 1382 return; 1383 } 1384 s->tls_creds = (QCryptoTLSCreds *) 1385 object_dynamic_cast(creds, 1386 TYPE_QCRYPTO_TLS_CREDS); 1387 if (!s->tls_creds) { 1388 error_setg(errp, "Object with id '%s' is not TLS credentials", 1389 sock->tls_creds); 1390 return; 1391 } 1392 object_ref(OBJECT(s->tls_creds)); 1393 if (is_listen) { 1394 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 1395 error_setg(errp, "%s", 1396 "Expected TLS credentials for server endpoint"); 1397 return; 1398 } 1399 } else { 1400 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { 1401 error_setg(errp, "%s", 1402 "Expected TLS credentials for client endpoint"); 1403 return; 1404 } 1405 } 1406 } 1407 s->tls_authz = g_strdup(sock->tls_authz); 1408 1409 s->addr = addr = socket_address_flatten(sock->addr); 1410 1411 if (!qmp_chardev_validate_socket(sock, addr, errp)) { 1412 return; 1413 } 1414 1415 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); 1416 /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */ 1417 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) { 1418 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); 1419 } 1420 1421 if (!yank_register_instance(CHARDEV_YANK_INSTANCE(chr->label), errp)) { 1422 return; 1423 } 1424 s->registered_yank = true; 1425 1426 /* be isn't opened until we get a connection */ 1427 *be_opened = false; 1428 1429 update_disconnected_filename(s); 1430 1431 if (s->is_listen) { 1432 if (qmp_chardev_open_socket_server(chr, is_telnet || is_tn3270, 1433 is_waitconnect, errp) < 0) { 1434 return; 1435 } 1436 } else { 1437 if (qmp_chardev_open_socket_client(chr, reconnect, errp) < 0) { 1438 return; 1439 } 1440 } 1441 } 1442 1443 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend, 1444 Error **errp) 1445 { 1446 const char *path = qemu_opt_get(opts, "path"); 1447 const char *host = qemu_opt_get(opts, "host"); 1448 const char *port = qemu_opt_get(opts, "port"); 1449 const char *fd = qemu_opt_get(opts, "fd"); 1450 #ifdef CONFIG_LINUX 1451 bool tight = qemu_opt_get_bool(opts, "tight", true); 1452 bool abstract = qemu_opt_get_bool(opts, "abstract", false); 1453 #endif 1454 SocketAddressLegacy *addr; 1455 ChardevSocket *sock; 1456 1457 if ((!!path + !!fd + !!host) != 1) { 1458 error_setg(errp, 1459 "Exactly one of 'path', 'fd' or 'host' required"); 1460 return; 1461 } 1462 1463 if (host && !port) { 1464 error_setg(errp, "chardev: socket: no port given"); 1465 return; 1466 } 1467 1468 backend->type = CHARDEV_BACKEND_KIND_SOCKET; 1469 sock = backend->u.socket.data = g_new0(ChardevSocket, 1); 1470 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock)); 1471 1472 sock->has_nodelay = qemu_opt_get(opts, "delay"); 1473 sock->nodelay = !qemu_opt_get_bool(opts, "delay", true); 1474 /* 1475 * We have different default to QMP for 'server', hence 1476 * we can't just check for existence of 'server' 1477 */ 1478 sock->has_server = true; 1479 sock->server = qemu_opt_get_bool(opts, "server", false); 1480 sock->has_telnet = qemu_opt_get(opts, "telnet"); 1481 sock->telnet = qemu_opt_get_bool(opts, "telnet", false); 1482 sock->has_tn3270 = qemu_opt_get(opts, "tn3270"); 1483 sock->tn3270 = qemu_opt_get_bool(opts, "tn3270", false); 1484 sock->has_websocket = qemu_opt_get(opts, "websocket"); 1485 sock->websocket = qemu_opt_get_bool(opts, "websocket", false); 1486 /* 1487 * We have different default to QMP for 'wait' when 'server' 1488 * is set, hence we can't just check for existence of 'wait' 1489 */ 1490 sock->has_wait = qemu_opt_find(opts, "wait") || sock->server; 1491 sock->wait = qemu_opt_get_bool(opts, "wait", true); 1492 sock->has_reconnect = qemu_opt_find(opts, "reconnect"); 1493 sock->reconnect = qemu_opt_get_number(opts, "reconnect", 0); 1494 sock->has_tls_creds = qemu_opt_get(opts, "tls-creds"); 1495 sock->tls_creds = g_strdup(qemu_opt_get(opts, "tls-creds")); 1496 sock->has_tls_authz = qemu_opt_get(opts, "tls-authz"); 1497 sock->tls_authz = g_strdup(qemu_opt_get(opts, "tls-authz")); 1498 1499 addr = g_new0(SocketAddressLegacy, 1); 1500 if (path) { 1501 UnixSocketAddress *q_unix; 1502 addr->type = SOCKET_ADDRESS_LEGACY_KIND_UNIX; 1503 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 1504 q_unix->path = g_strdup(path); 1505 #ifdef CONFIG_LINUX 1506 q_unix->has_tight = true; 1507 q_unix->tight = tight; 1508 q_unix->has_abstract = true; 1509 q_unix->abstract = abstract; 1510 #endif 1511 } else if (host) { 1512 addr->type = SOCKET_ADDRESS_LEGACY_KIND_INET; 1513 addr->u.inet.data = g_new(InetSocketAddress, 1); 1514 *addr->u.inet.data = (InetSocketAddress) { 1515 .host = g_strdup(host), 1516 .port = g_strdup(port), 1517 .has_to = qemu_opt_get(opts, "to"), 1518 .to = qemu_opt_get_number(opts, "to", 0), 1519 .has_ipv4 = qemu_opt_get(opts, "ipv4"), 1520 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), 1521 .has_ipv6 = qemu_opt_get(opts, "ipv6"), 1522 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), 1523 }; 1524 } else if (fd) { 1525 addr->type = SOCKET_ADDRESS_LEGACY_KIND_FD; 1526 addr->u.fd.data = g_new(String, 1); 1527 addr->u.fd.data->str = g_strdup(fd); 1528 } else { 1529 g_assert_not_reached(); 1530 } 1531 sock->addr = addr; 1532 } 1533 1534 static void 1535 char_socket_get_addr(Object *obj, Visitor *v, const char *name, 1536 void *opaque, Error **errp) 1537 { 1538 SocketChardev *s = SOCKET_CHARDEV(obj); 1539 1540 visit_type_SocketAddress(v, name, &s->addr, errp); 1541 } 1542 1543 static bool 1544 char_socket_get_connected(Object *obj, Error **errp) 1545 { 1546 SocketChardev *s = SOCKET_CHARDEV(obj); 1547 1548 return s->state == TCP_CHARDEV_STATE_CONNECTED; 1549 } 1550 1551 static void char_socket_class_init(ObjectClass *oc, void *data) 1552 { 1553 ChardevClass *cc = CHARDEV_CLASS(oc); 1554 1555 cc->parse = qemu_chr_parse_socket; 1556 cc->open = qmp_chardev_open_socket; 1557 cc->chr_wait_connected = tcp_chr_wait_connected; 1558 cc->chr_write = tcp_chr_write; 1559 cc->chr_sync_read = tcp_chr_sync_read; 1560 cc->chr_disconnect = tcp_chr_disconnect; 1561 cc->get_msgfds = tcp_get_msgfds; 1562 cc->set_msgfds = tcp_set_msgfds; 1563 cc->chr_add_client = tcp_chr_add_client; 1564 cc->chr_add_watch = tcp_chr_add_watch; 1565 cc->chr_update_read_handler = tcp_chr_update_read_handler; 1566 1567 object_class_property_add(oc, "addr", "SocketAddress", 1568 char_socket_get_addr, NULL, 1569 NULL, NULL); 1570 1571 object_class_property_add_bool(oc, "connected", char_socket_get_connected, 1572 NULL); 1573 } 1574 1575 static const TypeInfo char_socket_type_info = { 1576 .name = TYPE_CHARDEV_SOCKET, 1577 .parent = TYPE_CHARDEV, 1578 .instance_size = sizeof(SocketChardev), 1579 .instance_finalize = char_socket_finalize, 1580 .class_init = char_socket_class_init, 1581 }; 1582 1583 static void register_types(void) 1584 { 1585 type_register_static(&char_socket_type_info); 1586 } 1587 1588 type_init(register_types); 1589