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->state == TCP_CHARDEV_STATE_CONNECTING 421 || s->state == TCP_CHARDEV_STATE_CONNECTED) { 422 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 423 yank_generic_iochannel, 424 QIO_CHANNEL(s->sioc)); 425 } 426 object_unref(OBJECT(s->sioc)); 427 s->sioc = NULL; 428 object_unref(OBJECT(s->ioc)); 429 s->ioc = NULL; 430 g_free(chr->filename); 431 chr->filename = NULL; 432 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 433 } 434 435 static const char *qemu_chr_socket_protocol(SocketChardev *s) 436 { 437 if (s->is_telnet) { 438 return "telnet"; 439 } 440 return s->is_websock ? "websocket" : "tcp"; 441 } 442 443 static char *qemu_chr_socket_address(SocketChardev *s, const char *prefix) 444 { 445 switch (s->addr->type) { 446 case SOCKET_ADDRESS_TYPE_INET: 447 return g_strdup_printf("%s%s:%s:%s%s", prefix, 448 qemu_chr_socket_protocol(s), 449 s->addr->u.inet.host, 450 s->addr->u.inet.port, 451 s->is_listen ? ",server" : ""); 452 break; 453 case SOCKET_ADDRESS_TYPE_UNIX: 454 { 455 const char *tight = "", *abstract = ""; 456 UnixSocketAddress *sa = &s->addr->u.q_unix; 457 458 #ifdef CONFIG_LINUX 459 if (sa->has_abstract && sa->abstract) { 460 abstract = ",abstract"; 461 if (sa->has_tight && sa->tight) { 462 tight = ",tight"; 463 } 464 } 465 #endif 466 467 return g_strdup_printf("%sunix:%s%s%s%s", prefix, sa->path, 468 abstract, tight, 469 s->is_listen ? ",server" : ""); 470 break; 471 } 472 case SOCKET_ADDRESS_TYPE_FD: 473 return g_strdup_printf("%sfd:%s%s", prefix, s->addr->u.fd.str, 474 s->is_listen ? ",server" : ""); 475 break; 476 case SOCKET_ADDRESS_TYPE_VSOCK: 477 return g_strdup_printf("%svsock:%s:%s", prefix, 478 s->addr->u.vsock.cid, 479 s->addr->u.vsock.port); 480 default: 481 abort(); 482 } 483 } 484 485 static void update_disconnected_filename(SocketChardev *s) 486 { 487 Chardev *chr = CHARDEV(s); 488 489 g_free(chr->filename); 490 if (s->addr) { 491 chr->filename = qemu_chr_socket_address(s, "disconnected:"); 492 } else { 493 chr->filename = g_strdup("disconnected:socket"); 494 } 495 } 496 497 /* NB may be called even if tcp_chr_connect has not been 498 * reached, due to TLS or telnet initialization failure, 499 * so can *not* assume s->state == TCP_CHARDEV_STATE_CONNECTED 500 * This must be called with chr->chr_write_lock held. 501 */ 502 static void tcp_chr_disconnect_locked(Chardev *chr) 503 { 504 SocketChardev *s = SOCKET_CHARDEV(chr); 505 bool emit_close = s->state == TCP_CHARDEV_STATE_CONNECTED; 506 507 tcp_chr_free_connection(chr); 508 509 if (s->listener) { 510 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 511 chr, NULL, chr->gcontext); 512 } 513 update_disconnected_filename(s); 514 if (emit_close) { 515 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 516 } 517 if (s->reconnect_time && !s->reconnect_timer) { 518 qemu_chr_socket_restart_timer(chr); 519 } 520 } 521 522 static void tcp_chr_disconnect(Chardev *chr) 523 { 524 qemu_mutex_lock(&chr->chr_write_lock); 525 tcp_chr_disconnect_locked(chr); 526 qemu_mutex_unlock(&chr->chr_write_lock); 527 } 528 529 static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) 530 { 531 Chardev *chr = CHARDEV(opaque); 532 SocketChardev *s = SOCKET_CHARDEV(opaque); 533 uint8_t buf[CHR_READ_BUF_LEN]; 534 int len, size; 535 536 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) || 537 s->max_size <= 0) { 538 return TRUE; 539 } 540 len = sizeof(buf); 541 if (len > s->max_size) { 542 len = s->max_size; 543 } 544 size = tcp_chr_recv(chr, (void *)buf, len); 545 if (size == 0 || (size == -1 && errno != EAGAIN)) { 546 /* connection closed */ 547 tcp_chr_disconnect(chr); 548 } else if (size > 0) { 549 if (s->do_telnetopt) { 550 tcp_chr_process_IAC_bytes(chr, s, buf, &size); 551 } 552 if (size > 0) { 553 qemu_chr_be_write(chr, buf, size); 554 } 555 } 556 557 return TRUE; 558 } 559 560 static gboolean tcp_chr_hup(QIOChannel *channel, 561 GIOCondition cond, 562 void *opaque) 563 { 564 Chardev *chr = CHARDEV(opaque); 565 tcp_chr_disconnect(chr); 566 return G_SOURCE_REMOVE; 567 } 568 569 static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len) 570 { 571 SocketChardev *s = SOCKET_CHARDEV(chr); 572 int size; 573 574 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 575 return 0; 576 } 577 578 qio_channel_set_blocking(s->ioc, true, NULL); 579 size = tcp_chr_recv(chr, (void *) buf, len); 580 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 581 qio_channel_set_blocking(s->ioc, false, NULL); 582 } 583 if (size == 0) { 584 /* connection closed */ 585 tcp_chr_disconnect(chr); 586 } 587 588 return size; 589 } 590 591 static char *qemu_chr_compute_filename(SocketChardev *s) 592 { 593 struct sockaddr_storage *ss = &s->sioc->localAddr; 594 struct sockaddr_storage *ps = &s->sioc->remoteAddr; 595 socklen_t ss_len = s->sioc->localAddrLen; 596 socklen_t ps_len = s->sioc->remoteAddrLen; 597 char shost[NI_MAXHOST], sserv[NI_MAXSERV]; 598 char phost[NI_MAXHOST], pserv[NI_MAXSERV]; 599 const char *left = "", *right = ""; 600 601 switch (ss->ss_family) { 602 #ifndef _WIN32 603 case AF_UNIX: 604 return g_strdup_printf("unix:%s%s", 605 ((struct sockaddr_un *)(ss))->sun_path, 606 s->is_listen ? ",server" : ""); 607 #endif 608 case AF_INET6: 609 left = "["; 610 right = "]"; 611 /* fall through */ 612 case AF_INET: 613 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost), 614 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV); 615 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost), 616 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV); 617 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s", 618 qemu_chr_socket_protocol(s), 619 left, shost, right, sserv, 620 s->is_listen ? ",server" : "", 621 left, phost, right, pserv); 622 623 default: 624 return g_strdup_printf("unknown"); 625 } 626 } 627 628 static void update_ioc_handlers(SocketChardev *s) 629 { 630 Chardev *chr = CHARDEV(s); 631 632 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 633 return; 634 } 635 636 remove_fd_in_watch(chr); 637 chr->gsource = io_add_watch_poll(chr, s->ioc, 638 tcp_chr_read_poll, 639 tcp_chr_read, chr, 640 chr->gcontext); 641 642 remove_hup_source(s); 643 s->hup_source = qio_channel_create_watch(s->ioc, G_IO_HUP); 644 g_source_set_callback(s->hup_source, (GSourceFunc)tcp_chr_hup, 645 chr, NULL); 646 g_source_attach(s->hup_source, chr->gcontext); 647 } 648 649 static void tcp_chr_connect(void *opaque) 650 { 651 Chardev *chr = CHARDEV(opaque); 652 SocketChardev *s = SOCKET_CHARDEV(opaque); 653 654 g_free(chr->filename); 655 chr->filename = qemu_chr_compute_filename(s); 656 657 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTED); 658 update_ioc_handlers(s); 659 qemu_chr_be_event(chr, CHR_EVENT_OPENED); 660 } 661 662 static void tcp_chr_telnet_destroy(SocketChardev *s) 663 { 664 if (s->telnet_source) { 665 g_source_destroy(s->telnet_source); 666 g_source_unref(s->telnet_source); 667 s->telnet_source = NULL; 668 } 669 } 670 671 static void tcp_chr_update_read_handler(Chardev *chr) 672 { 673 SocketChardev *s = SOCKET_CHARDEV(chr); 674 675 if (s->listener && s->state == TCP_CHARDEV_STATE_DISCONNECTED) { 676 /* 677 * It's possible that chardev context is changed in 678 * qemu_chr_be_update_read_handlers(). Reset it for QIO net 679 * listener if there is. 680 */ 681 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 682 chr, NULL, chr->gcontext); 683 } 684 685 if (s->telnet_source) { 686 tcp_chr_telnet_init(CHARDEV(s)); 687 } 688 689 update_ioc_handlers(s); 690 } 691 692 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, 693 GIOCondition cond G_GNUC_UNUSED, 694 gpointer user_data) 695 { 696 SocketChardev *s = user_data; 697 Chardev *chr = CHARDEV(s); 698 TCPChardevTelnetInit *init = s->telnet_init; 699 ssize_t ret; 700 701 assert(init); 702 703 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL); 704 if (ret < 0) { 705 if (ret == QIO_CHANNEL_ERR_BLOCK) { 706 ret = 0; 707 } else { 708 tcp_chr_disconnect(chr); 709 goto end; 710 } 711 } 712 init->buflen -= ret; 713 714 if (init->buflen == 0) { 715 tcp_chr_connect(chr); 716 goto end; 717 } 718 719 memmove(init->buf, init->buf + ret, init->buflen); 720 721 return G_SOURCE_CONTINUE; 722 723 end: 724 g_free(s->telnet_init); 725 s->telnet_init = NULL; 726 g_source_unref(s->telnet_source); 727 s->telnet_source = NULL; 728 return G_SOURCE_REMOVE; 729 } 730 731 static void tcp_chr_telnet_init(Chardev *chr) 732 { 733 SocketChardev *s = SOCKET_CHARDEV(chr); 734 TCPChardevTelnetInit *init; 735 size_t n = 0; 736 737 /* Destroy existing task */ 738 tcp_chr_telnet_destroy(s); 739 740 if (s->telnet_init) { 741 /* We are possibly during a handshake already */ 742 goto cont; 743 } 744 745 s->telnet_init = g_new0(TCPChardevTelnetInit, 1); 746 init = s->telnet_init; 747 748 #define IACSET(x, a, b, c) \ 749 do { \ 750 x[n++] = a; \ 751 x[n++] = b; \ 752 x[n++] = c; \ 753 } while (0) 754 755 if (!s->is_tn3270) { 756 init->buflen = 12; 757 /* Prep the telnet negotion to put telnet in binary, 758 * no echo, single char mode */ 759 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ 760 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ 761 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ 762 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ 763 } else { 764 init->buflen = 21; 765 /* Prep the TN3270 negotion based on RFC1576 */ 766 IACSET(init->buf, 0xff, 0xfd, 0x19); /* IAC DO EOR */ 767 IACSET(init->buf, 0xff, 0xfb, 0x19); /* IAC WILL EOR */ 768 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO BINARY */ 769 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL BINARY */ 770 IACSET(init->buf, 0xff, 0xfd, 0x18); /* IAC DO TERMINAL TYPE */ 771 IACSET(init->buf, 0xff, 0xfa, 0x18); /* IAC SB TERMINAL TYPE */ 772 IACSET(init->buf, 0x01, 0xff, 0xf0); /* SEND IAC SE */ 773 } 774 775 #undef IACSET 776 777 cont: 778 s->telnet_source = qio_channel_add_watch_source(s->ioc, G_IO_OUT, 779 tcp_chr_telnet_init_io, 780 s, NULL, 781 chr->gcontext); 782 } 783 784 785 static void tcp_chr_websock_handshake(QIOTask *task, gpointer user_data) 786 { 787 Chardev *chr = user_data; 788 SocketChardev *s = user_data; 789 790 if (qio_task_propagate_error(task, NULL)) { 791 tcp_chr_disconnect(chr); 792 } else { 793 if (s->do_telnetopt) { 794 tcp_chr_telnet_init(chr); 795 } else { 796 tcp_chr_connect(chr); 797 } 798 } 799 } 800 801 802 static void tcp_chr_websock_init(Chardev *chr) 803 { 804 SocketChardev *s = SOCKET_CHARDEV(chr); 805 QIOChannelWebsock *wioc = NULL; 806 gchar *name; 807 808 wioc = qio_channel_websock_new_server(s->ioc); 809 810 name = g_strdup_printf("chardev-websocket-server-%s", chr->label); 811 qio_channel_set_name(QIO_CHANNEL(wioc), name); 812 g_free(name); 813 object_unref(OBJECT(s->ioc)); 814 s->ioc = QIO_CHANNEL(wioc); 815 816 qio_channel_websock_handshake(wioc, tcp_chr_websock_handshake, chr, NULL); 817 } 818 819 820 static void tcp_chr_tls_handshake(QIOTask *task, 821 gpointer user_data) 822 { 823 Chardev *chr = user_data; 824 SocketChardev *s = user_data; 825 826 if (qio_task_propagate_error(task, NULL)) { 827 tcp_chr_disconnect(chr); 828 } else { 829 if (s->is_websock) { 830 tcp_chr_websock_init(chr); 831 } else if (s->do_telnetopt) { 832 tcp_chr_telnet_init(chr); 833 } else { 834 tcp_chr_connect(chr); 835 } 836 } 837 } 838 839 840 static void tcp_chr_tls_init(Chardev *chr) 841 { 842 SocketChardev *s = SOCKET_CHARDEV(chr); 843 QIOChannelTLS *tioc; 844 gchar *name; 845 846 if (s->is_listen) { 847 tioc = qio_channel_tls_new_server( 848 s->ioc, s->tls_creds, 849 s->tls_authz, 850 NULL); 851 } else { 852 tioc = qio_channel_tls_new_client( 853 s->ioc, s->tls_creds, 854 s->addr->u.inet.host, 855 NULL); 856 } 857 if (tioc == NULL) { 858 tcp_chr_disconnect(chr); 859 return; 860 } 861 name = g_strdup_printf("chardev-tls-%s-%s", 862 s->is_listen ? "server" : "client", 863 chr->label); 864 qio_channel_set_name(QIO_CHANNEL(tioc), name); 865 g_free(name); 866 object_unref(OBJECT(s->ioc)); 867 s->ioc = QIO_CHANNEL(tioc); 868 869 qio_channel_tls_handshake(tioc, 870 tcp_chr_tls_handshake, 871 chr, 872 NULL, 873 chr->gcontext); 874 } 875 876 877 static void tcp_chr_set_client_ioc_name(Chardev *chr, 878 QIOChannelSocket *sioc) 879 { 880 SocketChardev *s = SOCKET_CHARDEV(chr); 881 char *name; 882 name = g_strdup_printf("chardev-tcp-%s-%s", 883 s->is_listen ? "server" : "client", 884 chr->label); 885 qio_channel_set_name(QIO_CHANNEL(sioc), name); 886 g_free(name); 887 888 } 889 890 static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc) 891 { 892 SocketChardev *s = SOCKET_CHARDEV(chr); 893 894 if (s->state != TCP_CHARDEV_STATE_CONNECTING) { 895 return -1; 896 } 897 898 s->ioc = QIO_CHANNEL(sioc); 899 object_ref(OBJECT(sioc)); 900 s->sioc = sioc; 901 object_ref(OBJECT(sioc)); 902 903 qio_channel_set_blocking(s->ioc, false, NULL); 904 905 if (s->do_nodelay) { 906 qio_channel_set_delay(s->ioc, false); 907 } 908 if (s->listener) { 909 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 910 NULL, chr->gcontext); 911 } 912 913 if (s->tls_creds) { 914 tcp_chr_tls_init(chr); 915 } else if (s->is_websock) { 916 tcp_chr_websock_init(chr); 917 } else if (s->do_telnetopt) { 918 tcp_chr_telnet_init(chr); 919 } else { 920 tcp_chr_connect(chr); 921 } 922 923 return 0; 924 } 925 926 927 static int tcp_chr_add_client(Chardev *chr, int fd) 928 { 929 int ret; 930 QIOChannelSocket *sioc; 931 SocketChardev *s = SOCKET_CHARDEV(chr); 932 933 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 934 return -1; 935 } 936 937 sioc = qio_channel_socket_new_fd(fd, NULL); 938 if (!sioc) { 939 return -1; 940 } 941 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 942 tcp_chr_set_client_ioc_name(chr, sioc); 943 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 944 yank_generic_iochannel, 945 QIO_CHANNEL(sioc)); 946 ret = tcp_chr_new_client(chr, sioc); 947 object_unref(OBJECT(sioc)); 948 return ret; 949 } 950 951 static void tcp_chr_accept(QIONetListener *listener, 952 QIOChannelSocket *cioc, 953 void *opaque) 954 { 955 Chardev *chr = CHARDEV(opaque); 956 SocketChardev *s = SOCKET_CHARDEV(chr); 957 958 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 959 tcp_chr_set_client_ioc_name(chr, cioc); 960 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 961 yank_generic_iochannel, 962 QIO_CHANNEL(cioc)); 963 tcp_chr_new_client(chr, cioc); 964 } 965 966 967 static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp) 968 { 969 SocketChardev *s = SOCKET_CHARDEV(chr); 970 QIOChannelSocket *sioc = qio_channel_socket_new(); 971 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 972 tcp_chr_set_client_ioc_name(chr, sioc); 973 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) { 974 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 975 object_unref(OBJECT(sioc)); 976 return -1; 977 } 978 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 979 yank_generic_iochannel, 980 QIO_CHANNEL(sioc)); 981 tcp_chr_new_client(chr, sioc); 982 object_unref(OBJECT(sioc)); 983 return 0; 984 } 985 986 987 static void tcp_chr_accept_server_sync(Chardev *chr) 988 { 989 SocketChardev *s = SOCKET_CHARDEV(chr); 990 QIOChannelSocket *sioc; 991 info_report("QEMU waiting for connection on: %s", 992 chr->filename); 993 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 994 sioc = qio_net_listener_wait_client(s->listener); 995 tcp_chr_set_client_ioc_name(chr, sioc); 996 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 997 yank_generic_iochannel, 998 QIO_CHANNEL(sioc)); 999 tcp_chr_new_client(chr, sioc); 1000 object_unref(OBJECT(sioc)); 1001 } 1002 1003 1004 static int tcp_chr_wait_connected(Chardev *chr, Error **errp) 1005 { 1006 SocketChardev *s = SOCKET_CHARDEV(chr); 1007 const char *opts[] = { "telnet", "tn3270", "websock", "tls-creds" }; 1008 bool optset[] = { s->is_telnet, s->is_tn3270, s->is_websock, s->tls_creds }; 1009 size_t i; 1010 1011 QEMU_BUILD_BUG_ON(G_N_ELEMENTS(opts) != G_N_ELEMENTS(optset)); 1012 for (i = 0; i < G_N_ELEMENTS(opts); i++) { 1013 if (optset[i]) { 1014 error_setg(errp, 1015 "'%s' option is incompatible with waiting for " 1016 "connection completion", opts[i]); 1017 return -1; 1018 } 1019 } 1020 1021 tcp_chr_reconn_timer_cancel(s); 1022 1023 /* 1024 * We expect states to be as follows: 1025 * 1026 * - server 1027 * - wait -> CONNECTED 1028 * - nowait -> DISCONNECTED 1029 * - client 1030 * - reconnect == 0 -> CONNECTED 1031 * - reconnect != 0 -> CONNECTING 1032 * 1033 */ 1034 if (s->state == TCP_CHARDEV_STATE_CONNECTING) { 1035 if (!s->connect_task) { 1036 error_setg(errp, 1037 "Unexpected 'connecting' state without connect task " 1038 "while waiting for connection completion"); 1039 return -1; 1040 } 1041 /* 1042 * tcp_chr_wait_connected should only ever be run from the 1043 * main loop thread associated with chr->gcontext, otherwise 1044 * qio_task_wait_thread has a dangerous race condition with 1045 * free'ing of the s->connect_task object. 1046 * 1047 * Acquiring the main context doesn't 100% prove we're in 1048 * the main loop thread, but it does at least guarantee 1049 * that the main loop won't be executed by another thread 1050 * avoiding the race condition with the task idle callback. 1051 */ 1052 g_main_context_acquire(chr->gcontext); 1053 qio_task_wait_thread(s->connect_task); 1054 g_main_context_release(chr->gcontext); 1055 1056 /* 1057 * The completion callback (qemu_chr_socket_connected) for 1058 * s->connect_task should have set this to NULL by the time 1059 * qio_task_wait_thread has returned. 1060 */ 1061 assert(!s->connect_task); 1062 1063 /* 1064 * NB we are *not* guaranteed to have "s->state == ..CONNECTED" 1065 * at this point as this first connect may be failed, so 1066 * allow the next loop to run regardless. 1067 */ 1068 } 1069 1070 while (s->state != TCP_CHARDEV_STATE_CONNECTED) { 1071 if (s->is_listen) { 1072 tcp_chr_accept_server_sync(chr); 1073 } else { 1074 Error *err = NULL; 1075 if (tcp_chr_connect_client_sync(chr, &err) < 0) { 1076 if (s->reconnect_time) { 1077 error_free(err); 1078 g_usleep(s->reconnect_time * 1000ULL * 1000ULL); 1079 } else { 1080 error_propagate(errp, err); 1081 return -1; 1082 } 1083 } 1084 } 1085 } 1086 1087 return 0; 1088 } 1089 1090 static void char_socket_finalize(Object *obj) 1091 { 1092 Chardev *chr = CHARDEV(obj); 1093 SocketChardev *s = SOCKET_CHARDEV(obj); 1094 1095 tcp_chr_free_connection(chr); 1096 tcp_chr_reconn_timer_cancel(s); 1097 qapi_free_SocketAddress(s->addr); 1098 tcp_chr_telnet_destroy(s); 1099 g_free(s->telnet_init); 1100 if (s->listener) { 1101 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 1102 NULL, chr->gcontext); 1103 object_unref(OBJECT(s->listener)); 1104 } 1105 if (s->tls_creds) { 1106 object_unref(OBJECT(s->tls_creds)); 1107 } 1108 g_free(s->tls_authz); 1109 if (s->registered_yank) { 1110 yank_unregister_instance(CHARDEV_YANK_INSTANCE(chr->label)); 1111 } 1112 1113 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 1114 } 1115 1116 static void qemu_chr_socket_connected(QIOTask *task, void *opaque) 1117 { 1118 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1119 Chardev *chr = CHARDEV(opaque); 1120 SocketChardev *s = SOCKET_CHARDEV(chr); 1121 Error *err = NULL; 1122 1123 s->connect_task = NULL; 1124 1125 if (qio_task_propagate_error(task, &err)) { 1126 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 1127 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 1128 yank_generic_iochannel, 1129 QIO_CHANNEL(sioc)); 1130 check_report_connect_error(chr, err); 1131 goto cleanup; 1132 } 1133 1134 s->connect_err_reported = false; 1135 tcp_chr_new_client(chr, sioc); 1136 1137 cleanup: 1138 object_unref(OBJECT(sioc)); 1139 } 1140 1141 1142 static void tcp_chr_connect_client_task(QIOTask *task, 1143 gpointer opaque) 1144 { 1145 QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1146 SocketAddress *addr = opaque; 1147 Error *err = NULL; 1148 1149 qio_channel_socket_connect_sync(ioc, addr, &err); 1150 1151 qio_task_set_error(task, err); 1152 } 1153 1154 1155 static void tcp_chr_connect_client_async(Chardev *chr) 1156 { 1157 SocketChardev *s = SOCKET_CHARDEV(chr); 1158 QIOChannelSocket *sioc; 1159 1160 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 1161 sioc = qio_channel_socket_new(); 1162 tcp_chr_set_client_ioc_name(chr, sioc); 1163 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 1164 yank_generic_iochannel, 1165 QIO_CHANNEL(sioc)); 1166 /* 1167 * Normally code would use the qio_channel_socket_connect_async 1168 * method which uses a QIOTask + qio_task_set_error internally 1169 * to avoid blocking. The tcp_chr_wait_connected method, however, 1170 * needs a way to synchronize with completion of the background 1171 * connect task which can't be done with the QIOChannelSocket 1172 * async APIs. Thus we must use QIOTask directly to implement 1173 * the non-blocking concept locally. 1174 */ 1175 s->connect_task = qio_task_new(OBJECT(sioc), 1176 qemu_chr_socket_connected, 1177 object_ref(OBJECT(chr)), 1178 (GDestroyNotify)object_unref); 1179 qio_task_run_in_thread(s->connect_task, 1180 tcp_chr_connect_client_task, 1181 s->addr, 1182 NULL, 1183 chr->gcontext); 1184 } 1185 1186 static gboolean socket_reconnect_timeout(gpointer opaque) 1187 { 1188 Chardev *chr = CHARDEV(opaque); 1189 SocketChardev *s = SOCKET_CHARDEV(opaque); 1190 1191 qemu_mutex_lock(&chr->chr_write_lock); 1192 g_source_unref(s->reconnect_timer); 1193 s->reconnect_timer = NULL; 1194 qemu_mutex_unlock(&chr->chr_write_lock); 1195 1196 if (chr->be_open) { 1197 return false; 1198 } 1199 1200 tcp_chr_connect_client_async(chr); 1201 1202 return false; 1203 } 1204 1205 1206 static int qmp_chardev_open_socket_server(Chardev *chr, 1207 bool is_telnet, 1208 bool is_waitconnect, 1209 Error **errp) 1210 { 1211 SocketChardev *s = SOCKET_CHARDEV(chr); 1212 char *name; 1213 if (is_telnet) { 1214 s->do_telnetopt = 1; 1215 } 1216 s->listener = qio_net_listener_new(); 1217 1218 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label); 1219 qio_net_listener_set_name(s->listener, name); 1220 g_free(name); 1221 1222 if (qio_net_listener_open_sync(s->listener, s->addr, 1, errp) < 0) { 1223 object_unref(OBJECT(s->listener)); 1224 s->listener = NULL; 1225 return -1; 1226 } 1227 1228 qapi_free_SocketAddress(s->addr); 1229 s->addr = socket_local_address(s->listener->sioc[0]->fd, errp); 1230 update_disconnected_filename(s); 1231 1232 if (is_waitconnect) { 1233 tcp_chr_accept_server_sync(chr); 1234 } else { 1235 qio_net_listener_set_client_func_full(s->listener, 1236 tcp_chr_accept, 1237 chr, NULL, 1238 chr->gcontext); 1239 } 1240 1241 return 0; 1242 } 1243 1244 1245 static int qmp_chardev_open_socket_client(Chardev *chr, 1246 int64_t reconnect, 1247 Error **errp) 1248 { 1249 SocketChardev *s = SOCKET_CHARDEV(chr); 1250 1251 if (reconnect > 0) { 1252 s->reconnect_time = reconnect; 1253 tcp_chr_connect_client_async(chr); 1254 return 0; 1255 } else { 1256 return tcp_chr_connect_client_sync(chr, errp); 1257 } 1258 } 1259 1260 1261 static bool qmp_chardev_validate_socket(ChardevSocket *sock, 1262 SocketAddress *addr, 1263 Error **errp) 1264 { 1265 /* Validate any options which have a dependency on address type */ 1266 switch (addr->type) { 1267 case SOCKET_ADDRESS_TYPE_FD: 1268 if (sock->has_reconnect) { 1269 error_setg(errp, 1270 "'reconnect' option is incompatible with " 1271 "'fd' address type"); 1272 return false; 1273 } 1274 if (sock->has_tls_creds && 1275 !(sock->has_server && sock->server)) { 1276 error_setg(errp, 1277 "'tls_creds' option is incompatible with " 1278 "'fd' address type as client"); 1279 return false; 1280 } 1281 break; 1282 1283 case SOCKET_ADDRESS_TYPE_UNIX: 1284 if (sock->has_tls_creds) { 1285 error_setg(errp, 1286 "'tls_creds' option is incompatible with " 1287 "'unix' address type"); 1288 return false; 1289 } 1290 break; 1291 1292 case SOCKET_ADDRESS_TYPE_INET: 1293 break; 1294 1295 case SOCKET_ADDRESS_TYPE_VSOCK: 1296 if (sock->has_tls_creds) { 1297 error_setg(errp, 1298 "'tls_creds' option is incompatible with " 1299 "'vsock' address type"); 1300 return false; 1301 } 1302 1303 default: 1304 break; 1305 } 1306 1307 if (sock->has_tls_authz && !sock->has_tls_creds) { 1308 error_setg(errp, "'tls_authz' option requires 'tls_creds' option"); 1309 return false; 1310 } 1311 1312 /* Validate any options which have a dependancy on client vs server */ 1313 if (!sock->has_server || sock->server) { 1314 if (sock->has_reconnect) { 1315 error_setg(errp, 1316 "'reconnect' option is incompatible with " 1317 "socket in server listen mode"); 1318 return false; 1319 } 1320 } else { 1321 if (sock->has_websocket && sock->websocket) { 1322 error_setg(errp, "%s", "Websocket client is not implemented"); 1323 return false; 1324 } 1325 if (sock->has_wait) { 1326 warn_report("'wait' option is deprecated with " 1327 "socket in client connect mode"); 1328 if (sock->wait) { 1329 error_setg(errp, "%s", 1330 "'wait' option is incompatible with " 1331 "socket in client connect mode"); 1332 return false; 1333 } 1334 } 1335 } 1336 1337 return true; 1338 } 1339 1340 1341 static void qmp_chardev_open_socket(Chardev *chr, 1342 ChardevBackend *backend, 1343 bool *be_opened, 1344 Error **errp) 1345 { 1346 SocketChardev *s = SOCKET_CHARDEV(chr); 1347 ChardevSocket *sock = backend->u.socket.data; 1348 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false; 1349 bool is_listen = sock->has_server ? sock->server : true; 1350 bool is_telnet = sock->has_telnet ? sock->telnet : false; 1351 bool is_tn3270 = sock->has_tn3270 ? sock->tn3270 : false; 1352 bool is_waitconnect = sock->has_wait ? sock->wait : false; 1353 bool is_websock = sock->has_websocket ? sock->websocket : false; 1354 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; 1355 SocketAddress *addr; 1356 1357 s->is_listen = is_listen; 1358 s->is_telnet = is_telnet; 1359 s->is_tn3270 = is_tn3270; 1360 s->is_websock = is_websock; 1361 s->do_nodelay = do_nodelay; 1362 if (sock->tls_creds) { 1363 Object *creds; 1364 creds = object_resolve_path_component( 1365 object_get_objects_root(), sock->tls_creds); 1366 if (!creds) { 1367 error_setg(errp, "No TLS credentials with id '%s'", 1368 sock->tls_creds); 1369 return; 1370 } 1371 s->tls_creds = (QCryptoTLSCreds *) 1372 object_dynamic_cast(creds, 1373 TYPE_QCRYPTO_TLS_CREDS); 1374 if (!s->tls_creds) { 1375 error_setg(errp, "Object with id '%s' is not TLS credentials", 1376 sock->tls_creds); 1377 return; 1378 } 1379 object_ref(OBJECT(s->tls_creds)); 1380 if (is_listen) { 1381 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 1382 error_setg(errp, "%s", 1383 "Expected TLS credentials for server endpoint"); 1384 return; 1385 } 1386 } else { 1387 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { 1388 error_setg(errp, "%s", 1389 "Expected TLS credentials for client endpoint"); 1390 return; 1391 } 1392 } 1393 } 1394 s->tls_authz = g_strdup(sock->tls_authz); 1395 1396 s->addr = addr = socket_address_flatten(sock->addr); 1397 1398 if (!qmp_chardev_validate_socket(sock, addr, errp)) { 1399 return; 1400 } 1401 1402 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); 1403 /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */ 1404 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) { 1405 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); 1406 } 1407 1408 if (!yank_register_instance(CHARDEV_YANK_INSTANCE(chr->label), errp)) { 1409 return; 1410 } 1411 s->registered_yank = true; 1412 1413 /* be isn't opened until we get a connection */ 1414 *be_opened = false; 1415 1416 update_disconnected_filename(s); 1417 1418 if (s->is_listen) { 1419 if (qmp_chardev_open_socket_server(chr, is_telnet || is_tn3270, 1420 is_waitconnect, errp) < 0) { 1421 return; 1422 } 1423 } else { 1424 if (qmp_chardev_open_socket_client(chr, reconnect, errp) < 0) { 1425 return; 1426 } 1427 } 1428 } 1429 1430 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend, 1431 Error **errp) 1432 { 1433 const char *path = qemu_opt_get(opts, "path"); 1434 const char *host = qemu_opt_get(opts, "host"); 1435 const char *port = qemu_opt_get(opts, "port"); 1436 const char *fd = qemu_opt_get(opts, "fd"); 1437 #ifdef CONFIG_LINUX 1438 bool tight = qemu_opt_get_bool(opts, "tight", true); 1439 bool abstract = qemu_opt_get_bool(opts, "abstract", false); 1440 #endif 1441 SocketAddressLegacy *addr; 1442 ChardevSocket *sock; 1443 1444 if ((!!path + !!fd + !!host) != 1) { 1445 error_setg(errp, 1446 "Exactly one of 'path', 'fd' or 'host' required"); 1447 return; 1448 } 1449 1450 if (host && !port) { 1451 error_setg(errp, "chardev: socket: no port given"); 1452 return; 1453 } 1454 1455 backend->type = CHARDEV_BACKEND_KIND_SOCKET; 1456 sock = backend->u.socket.data = g_new0(ChardevSocket, 1); 1457 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock)); 1458 1459 sock->has_nodelay = qemu_opt_get(opts, "delay"); 1460 sock->nodelay = !qemu_opt_get_bool(opts, "delay", true); 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->has_tls_creds = qemu_opt_get(opts, "tls-creds"); 1482 sock->tls_creds = g_strdup(qemu_opt_get(opts, "tls-creds")); 1483 sock->has_tls_authz = qemu_opt_get(opts, "tls-authz"); 1484 sock->tls_authz = g_strdup(qemu_opt_get(opts, "tls-authz")); 1485 1486 addr = g_new0(SocketAddressLegacy, 1); 1487 if (path) { 1488 UnixSocketAddress *q_unix; 1489 addr->type = SOCKET_ADDRESS_LEGACY_KIND_UNIX; 1490 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 1491 q_unix->path = g_strdup(path); 1492 #ifdef CONFIG_LINUX 1493 q_unix->has_tight = true; 1494 q_unix->tight = tight; 1495 q_unix->has_abstract = true; 1496 q_unix->abstract = abstract; 1497 #endif 1498 } else if (host) { 1499 addr->type = SOCKET_ADDRESS_LEGACY_KIND_INET; 1500 addr->u.inet.data = g_new(InetSocketAddress, 1); 1501 *addr->u.inet.data = (InetSocketAddress) { 1502 .host = g_strdup(host), 1503 .port = g_strdup(port), 1504 .has_to = qemu_opt_get(opts, "to"), 1505 .to = qemu_opt_get_number(opts, "to", 0), 1506 .has_ipv4 = qemu_opt_get(opts, "ipv4"), 1507 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), 1508 .has_ipv6 = qemu_opt_get(opts, "ipv6"), 1509 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), 1510 }; 1511 } else if (fd) { 1512 addr->type = SOCKET_ADDRESS_LEGACY_KIND_FD; 1513 addr->u.fd.data = g_new(String, 1); 1514 addr->u.fd.data->str = g_strdup(fd); 1515 } else { 1516 g_assert_not_reached(); 1517 } 1518 sock->addr = addr; 1519 } 1520 1521 static void 1522 char_socket_get_addr(Object *obj, Visitor *v, const char *name, 1523 void *opaque, Error **errp) 1524 { 1525 SocketChardev *s = SOCKET_CHARDEV(obj); 1526 1527 visit_type_SocketAddress(v, name, &s->addr, errp); 1528 } 1529 1530 static bool 1531 char_socket_get_connected(Object *obj, Error **errp) 1532 { 1533 SocketChardev *s = SOCKET_CHARDEV(obj); 1534 1535 return s->state == TCP_CHARDEV_STATE_CONNECTED; 1536 } 1537 1538 static void char_socket_class_init(ObjectClass *oc, void *data) 1539 { 1540 ChardevClass *cc = CHARDEV_CLASS(oc); 1541 1542 cc->parse = qemu_chr_parse_socket; 1543 cc->open = qmp_chardev_open_socket; 1544 cc->chr_wait_connected = tcp_chr_wait_connected; 1545 cc->chr_write = tcp_chr_write; 1546 cc->chr_sync_read = tcp_chr_sync_read; 1547 cc->chr_disconnect = tcp_chr_disconnect; 1548 cc->get_msgfds = tcp_get_msgfds; 1549 cc->set_msgfds = tcp_set_msgfds; 1550 cc->chr_add_client = tcp_chr_add_client; 1551 cc->chr_add_watch = tcp_chr_add_watch; 1552 cc->chr_update_read_handler = tcp_chr_update_read_handler; 1553 1554 object_class_property_add(oc, "addr", "SocketAddress", 1555 char_socket_get_addr, NULL, 1556 NULL, NULL); 1557 1558 object_class_property_add_bool(oc, "connected", char_socket_get_connected, 1559 NULL); 1560 } 1561 1562 static const TypeInfo char_socket_type_info = { 1563 .name = TYPE_CHARDEV_SOCKET, 1564 .parent = TYPE_CHARDEV, 1565 .instance_size = sizeof(SocketChardev), 1566 .instance_finalize = char_socket_finalize, 1567 .class_init = char_socket_class_init, 1568 }; 1569 1570 static void register_types(void) 1571 { 1572 type_register_static(&char_socket_type_info); 1573 } 1574 1575 type_init(register_types); 1576