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 if (!s->ioc) { 391 return NULL; 392 } 393 return qio_channel_create_watch(s->ioc, cond); 394 } 395 396 static void remove_hup_source(SocketChardev *s) 397 { 398 if (s->hup_source != NULL) { 399 g_source_destroy(s->hup_source); 400 g_source_unref(s->hup_source); 401 s->hup_source = NULL; 402 } 403 } 404 405 static void tcp_chr_free_connection(Chardev *chr) 406 { 407 SocketChardev *s = SOCKET_CHARDEV(chr); 408 int i; 409 410 if (s->read_msgfds_num) { 411 for (i = 0; i < s->read_msgfds_num; i++) { 412 close(s->read_msgfds[i]); 413 } 414 g_free(s->read_msgfds); 415 s->read_msgfds = NULL; 416 s->read_msgfds_num = 0; 417 } 418 419 remove_hup_source(s); 420 421 tcp_set_msgfds(chr, NULL, 0); 422 remove_fd_in_watch(chr); 423 if (s->registered_yank && 424 (s->state == TCP_CHARDEV_STATE_CONNECTING 425 || s->state == TCP_CHARDEV_STATE_CONNECTED)) { 426 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 427 yank_generic_iochannel, 428 QIO_CHANNEL(s->sioc)); 429 } 430 object_unref(OBJECT(s->sioc)); 431 s->sioc = NULL; 432 object_unref(OBJECT(s->ioc)); 433 s->ioc = NULL; 434 g_free(chr->filename); 435 chr->filename = NULL; 436 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 437 } 438 439 static const char *qemu_chr_socket_protocol(SocketChardev *s) 440 { 441 if (s->is_telnet) { 442 return "telnet"; 443 } 444 return s->is_websock ? "websocket" : "tcp"; 445 } 446 447 static char *qemu_chr_socket_address(SocketChardev *s, const char *prefix) 448 { 449 switch (s->addr->type) { 450 case SOCKET_ADDRESS_TYPE_INET: 451 return g_strdup_printf("%s%s:%s:%s%s", prefix, 452 qemu_chr_socket_protocol(s), 453 s->addr->u.inet.host, 454 s->addr->u.inet.port, 455 s->is_listen ? ",server=on" : ""); 456 break; 457 case SOCKET_ADDRESS_TYPE_UNIX: 458 { 459 const char *tight = "", *abstract = ""; 460 UnixSocketAddress *sa = &s->addr->u.q_unix; 461 462 #ifdef CONFIG_LINUX 463 if (sa->has_abstract && sa->abstract) { 464 abstract = ",abstract"; 465 if (sa->has_tight && sa->tight) { 466 tight = ",tight"; 467 } 468 } 469 #endif 470 471 return g_strdup_printf("%sunix:%s%s%s%s", prefix, sa->path, 472 abstract, tight, 473 s->is_listen ? ",server=on" : ""); 474 break; 475 } 476 case SOCKET_ADDRESS_TYPE_FD: 477 return g_strdup_printf("%sfd:%s%s", prefix, s->addr->u.fd.str, 478 s->is_listen ? ",server=on" : ""); 479 break; 480 case SOCKET_ADDRESS_TYPE_VSOCK: 481 return g_strdup_printf("%svsock:%s:%s", prefix, 482 s->addr->u.vsock.cid, 483 s->addr->u.vsock.port); 484 default: 485 abort(); 486 } 487 } 488 489 static void update_disconnected_filename(SocketChardev *s) 490 { 491 Chardev *chr = CHARDEV(s); 492 493 g_free(chr->filename); 494 if (s->addr) { 495 chr->filename = qemu_chr_socket_address(s, "disconnected:"); 496 } else { 497 chr->filename = g_strdup("disconnected:socket"); 498 } 499 } 500 501 /* NB may be called even if tcp_chr_connect has not been 502 * reached, due to TLS or telnet initialization failure, 503 * so can *not* assume s->state == TCP_CHARDEV_STATE_CONNECTED 504 * This must be called with chr->chr_write_lock held. 505 */ 506 static void tcp_chr_disconnect_locked(Chardev *chr) 507 { 508 SocketChardev *s = SOCKET_CHARDEV(chr); 509 bool emit_close = s->state == TCP_CHARDEV_STATE_CONNECTED; 510 511 tcp_chr_free_connection(chr); 512 513 if (s->listener) { 514 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 515 chr, NULL, chr->gcontext); 516 } 517 update_disconnected_filename(s); 518 if (emit_close) { 519 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 520 } 521 if (s->reconnect_time && !s->reconnect_timer) { 522 qemu_chr_socket_restart_timer(chr); 523 } 524 } 525 526 static void tcp_chr_disconnect(Chardev *chr) 527 { 528 qemu_mutex_lock(&chr->chr_write_lock); 529 tcp_chr_disconnect_locked(chr); 530 qemu_mutex_unlock(&chr->chr_write_lock); 531 } 532 533 static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) 534 { 535 Chardev *chr = CHARDEV(opaque); 536 SocketChardev *s = SOCKET_CHARDEV(opaque); 537 uint8_t buf[CHR_READ_BUF_LEN]; 538 int len, size; 539 540 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) || 541 s->max_size <= 0) { 542 return TRUE; 543 } 544 len = sizeof(buf); 545 if (len > s->max_size) { 546 len = s->max_size; 547 } 548 size = tcp_chr_recv(chr, (void *)buf, len); 549 if (size == 0 || (size == -1 && errno != EAGAIN)) { 550 /* connection closed */ 551 tcp_chr_disconnect(chr); 552 } else if (size > 0) { 553 if (s->do_telnetopt) { 554 tcp_chr_process_IAC_bytes(chr, s, buf, &size); 555 } 556 if (size > 0) { 557 qemu_chr_be_write(chr, buf, size); 558 } 559 } 560 561 return TRUE; 562 } 563 564 static gboolean tcp_chr_hup(QIOChannel *channel, 565 GIOCondition cond, 566 void *opaque) 567 { 568 Chardev *chr = CHARDEV(opaque); 569 tcp_chr_disconnect(chr); 570 return G_SOURCE_REMOVE; 571 } 572 573 static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len) 574 { 575 SocketChardev *s = SOCKET_CHARDEV(chr); 576 int size; 577 578 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 579 return 0; 580 } 581 582 qio_channel_set_blocking(s->ioc, true, NULL); 583 size = tcp_chr_recv(chr, (void *) buf, len); 584 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 585 qio_channel_set_blocking(s->ioc, false, NULL); 586 } 587 if (size == 0) { 588 /* connection closed */ 589 tcp_chr_disconnect(chr); 590 } 591 592 return size; 593 } 594 595 static char *qemu_chr_compute_filename(SocketChardev *s) 596 { 597 struct sockaddr_storage *ss = &s->sioc->localAddr; 598 struct sockaddr_storage *ps = &s->sioc->remoteAddr; 599 socklen_t ss_len = s->sioc->localAddrLen; 600 socklen_t ps_len = s->sioc->remoteAddrLen; 601 char shost[NI_MAXHOST], sserv[NI_MAXSERV]; 602 char phost[NI_MAXHOST], pserv[NI_MAXSERV]; 603 const char *left = "", *right = ""; 604 605 switch (ss->ss_family) { 606 #ifndef _WIN32 607 case AF_UNIX: 608 return g_strdup_printf("unix:%s%s", 609 ((struct sockaddr_un *)(ss))->sun_path, 610 s->is_listen ? ",server=on" : ""); 611 #endif 612 case AF_INET6: 613 left = "["; 614 right = "]"; 615 /* fall through */ 616 case AF_INET: 617 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost), 618 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV); 619 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost), 620 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV); 621 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s", 622 qemu_chr_socket_protocol(s), 623 left, shost, right, sserv, 624 s->is_listen ? ",server=on" : "", 625 left, phost, right, pserv); 626 627 default: 628 return g_strdup_printf("unknown"); 629 } 630 } 631 632 static void update_ioc_handlers(SocketChardev *s) 633 { 634 Chardev *chr = CHARDEV(s); 635 636 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 637 return; 638 } 639 640 remove_fd_in_watch(chr); 641 chr->gsource = io_add_watch_poll(chr, s->ioc, 642 tcp_chr_read_poll, 643 tcp_chr_read, chr, 644 chr->gcontext); 645 646 remove_hup_source(s); 647 s->hup_source = qio_channel_create_watch(s->ioc, G_IO_HUP); 648 g_source_set_callback(s->hup_source, (GSourceFunc)tcp_chr_hup, 649 chr, NULL); 650 g_source_attach(s->hup_source, chr->gcontext); 651 } 652 653 static void tcp_chr_connect(void *opaque) 654 { 655 Chardev *chr = CHARDEV(opaque); 656 SocketChardev *s = SOCKET_CHARDEV(opaque); 657 658 g_free(chr->filename); 659 chr->filename = qemu_chr_compute_filename(s); 660 661 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTED); 662 update_ioc_handlers(s); 663 qemu_chr_be_event(chr, CHR_EVENT_OPENED); 664 } 665 666 static void tcp_chr_telnet_destroy(SocketChardev *s) 667 { 668 if (s->telnet_source) { 669 g_source_destroy(s->telnet_source); 670 g_source_unref(s->telnet_source); 671 s->telnet_source = NULL; 672 } 673 } 674 675 static void tcp_chr_update_read_handler(Chardev *chr) 676 { 677 SocketChardev *s = SOCKET_CHARDEV(chr); 678 679 if (s->listener && s->state == TCP_CHARDEV_STATE_DISCONNECTED) { 680 /* 681 * It's possible that chardev context is changed in 682 * qemu_chr_be_update_read_handlers(). Reset it for QIO net 683 * listener if there is. 684 */ 685 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 686 chr, NULL, chr->gcontext); 687 } 688 689 if (s->telnet_source) { 690 tcp_chr_telnet_init(CHARDEV(s)); 691 } 692 693 update_ioc_handlers(s); 694 } 695 696 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, 697 GIOCondition cond G_GNUC_UNUSED, 698 gpointer user_data) 699 { 700 SocketChardev *s = user_data; 701 Chardev *chr = CHARDEV(s); 702 TCPChardevTelnetInit *init = s->telnet_init; 703 ssize_t ret; 704 705 assert(init); 706 707 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL); 708 if (ret < 0) { 709 if (ret == QIO_CHANNEL_ERR_BLOCK) { 710 ret = 0; 711 } else { 712 tcp_chr_disconnect(chr); 713 goto end; 714 } 715 } 716 init->buflen -= ret; 717 718 if (init->buflen == 0) { 719 tcp_chr_connect(chr); 720 goto end; 721 } 722 723 memmove(init->buf, init->buf + ret, init->buflen); 724 725 return G_SOURCE_CONTINUE; 726 727 end: 728 g_free(s->telnet_init); 729 s->telnet_init = NULL; 730 g_source_unref(s->telnet_source); 731 s->telnet_source = NULL; 732 return G_SOURCE_REMOVE; 733 } 734 735 static void tcp_chr_telnet_init(Chardev *chr) 736 { 737 SocketChardev *s = SOCKET_CHARDEV(chr); 738 TCPChardevTelnetInit *init; 739 size_t n = 0; 740 741 /* Destroy existing task */ 742 tcp_chr_telnet_destroy(s); 743 744 if (s->telnet_init) { 745 /* We are possibly during a handshake already */ 746 goto cont; 747 } 748 749 s->telnet_init = g_new0(TCPChardevTelnetInit, 1); 750 init = s->telnet_init; 751 752 #define IACSET(x, a, b, c) \ 753 do { \ 754 x[n++] = a; \ 755 x[n++] = b; \ 756 x[n++] = c; \ 757 } while (0) 758 759 if (!s->is_tn3270) { 760 init->buflen = 12; 761 /* Prep the telnet negotion to put telnet in binary, 762 * no echo, single char mode */ 763 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ 764 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ 765 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ 766 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ 767 } else { 768 init->buflen = 21; 769 /* Prep the TN3270 negotion based on RFC1576 */ 770 IACSET(init->buf, 0xff, 0xfd, 0x19); /* IAC DO EOR */ 771 IACSET(init->buf, 0xff, 0xfb, 0x19); /* IAC WILL EOR */ 772 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO BINARY */ 773 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL BINARY */ 774 IACSET(init->buf, 0xff, 0xfd, 0x18); /* IAC DO TERMINAL TYPE */ 775 IACSET(init->buf, 0xff, 0xfa, 0x18); /* IAC SB TERMINAL TYPE */ 776 IACSET(init->buf, 0x01, 0xff, 0xf0); /* SEND IAC SE */ 777 } 778 779 #undef IACSET 780 781 cont: 782 s->telnet_source = qio_channel_add_watch_source(s->ioc, G_IO_OUT, 783 tcp_chr_telnet_init_io, 784 s, NULL, 785 chr->gcontext); 786 } 787 788 789 static void tcp_chr_websock_handshake(QIOTask *task, gpointer user_data) 790 { 791 Chardev *chr = user_data; 792 SocketChardev *s = user_data; 793 794 if (qio_task_propagate_error(task, NULL)) { 795 tcp_chr_disconnect(chr); 796 } else { 797 if (s->do_telnetopt) { 798 tcp_chr_telnet_init(chr); 799 } else { 800 tcp_chr_connect(chr); 801 } 802 } 803 } 804 805 806 static void tcp_chr_websock_init(Chardev *chr) 807 { 808 SocketChardev *s = SOCKET_CHARDEV(chr); 809 QIOChannelWebsock *wioc = NULL; 810 gchar *name; 811 812 wioc = qio_channel_websock_new_server(s->ioc); 813 814 name = g_strdup_printf("chardev-websocket-server-%s", chr->label); 815 qio_channel_set_name(QIO_CHANNEL(wioc), name); 816 g_free(name); 817 object_unref(OBJECT(s->ioc)); 818 s->ioc = QIO_CHANNEL(wioc); 819 820 qio_channel_websock_handshake(wioc, tcp_chr_websock_handshake, chr, NULL); 821 } 822 823 824 static void tcp_chr_tls_handshake(QIOTask *task, 825 gpointer user_data) 826 { 827 Chardev *chr = user_data; 828 SocketChardev *s = user_data; 829 830 if (qio_task_propagate_error(task, NULL)) { 831 tcp_chr_disconnect(chr); 832 } else { 833 if (s->is_websock) { 834 tcp_chr_websock_init(chr); 835 } else if (s->do_telnetopt) { 836 tcp_chr_telnet_init(chr); 837 } else { 838 tcp_chr_connect(chr); 839 } 840 } 841 } 842 843 844 static void tcp_chr_tls_init(Chardev *chr) 845 { 846 SocketChardev *s = SOCKET_CHARDEV(chr); 847 QIOChannelTLS *tioc; 848 gchar *name; 849 850 if (s->is_listen) { 851 tioc = qio_channel_tls_new_server( 852 s->ioc, s->tls_creds, 853 s->tls_authz, 854 NULL); 855 } else { 856 tioc = qio_channel_tls_new_client( 857 s->ioc, s->tls_creds, 858 s->addr->u.inet.host, 859 NULL); 860 } 861 if (tioc == NULL) { 862 tcp_chr_disconnect(chr); 863 return; 864 } 865 name = g_strdup_printf("chardev-tls-%s-%s", 866 s->is_listen ? "server" : "client", 867 chr->label); 868 qio_channel_set_name(QIO_CHANNEL(tioc), name); 869 g_free(name); 870 object_unref(OBJECT(s->ioc)); 871 s->ioc = QIO_CHANNEL(tioc); 872 873 qio_channel_tls_handshake(tioc, 874 tcp_chr_tls_handshake, 875 chr, 876 NULL, 877 chr->gcontext); 878 } 879 880 881 static void tcp_chr_set_client_ioc_name(Chardev *chr, 882 QIOChannelSocket *sioc) 883 { 884 SocketChardev *s = SOCKET_CHARDEV(chr); 885 char *name; 886 name = g_strdup_printf("chardev-tcp-%s-%s", 887 s->is_listen ? "server" : "client", 888 chr->label); 889 qio_channel_set_name(QIO_CHANNEL(sioc), name); 890 g_free(name); 891 892 } 893 894 static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc) 895 { 896 SocketChardev *s = SOCKET_CHARDEV(chr); 897 898 if (s->state != TCP_CHARDEV_STATE_CONNECTING) { 899 return -1; 900 } 901 902 s->ioc = QIO_CHANNEL(sioc); 903 object_ref(OBJECT(sioc)); 904 s->sioc = sioc; 905 object_ref(OBJECT(sioc)); 906 907 qio_channel_set_blocking(s->ioc, false, NULL); 908 909 if (s->do_nodelay) { 910 qio_channel_set_delay(s->ioc, false); 911 } 912 if (s->listener) { 913 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 914 NULL, chr->gcontext); 915 } 916 917 if (s->tls_creds) { 918 tcp_chr_tls_init(chr); 919 } else if (s->is_websock) { 920 tcp_chr_websock_init(chr); 921 } else if (s->do_telnetopt) { 922 tcp_chr_telnet_init(chr); 923 } else { 924 tcp_chr_connect(chr); 925 } 926 927 return 0; 928 } 929 930 931 static int tcp_chr_add_client(Chardev *chr, int fd) 932 { 933 int ret; 934 QIOChannelSocket *sioc; 935 SocketChardev *s = SOCKET_CHARDEV(chr); 936 937 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 938 return -1; 939 } 940 941 sioc = qio_channel_socket_new_fd(fd, NULL); 942 if (!sioc) { 943 return -1; 944 } 945 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 946 tcp_chr_set_client_ioc_name(chr, sioc); 947 if (s->registered_yank) { 948 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 949 yank_generic_iochannel, 950 QIO_CHANNEL(sioc)); 951 } 952 ret = tcp_chr_new_client(chr, sioc); 953 object_unref(OBJECT(sioc)); 954 return ret; 955 } 956 957 static void tcp_chr_accept(QIONetListener *listener, 958 QIOChannelSocket *cioc, 959 void *opaque) 960 { 961 Chardev *chr = CHARDEV(opaque); 962 SocketChardev *s = SOCKET_CHARDEV(chr); 963 964 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 965 tcp_chr_set_client_ioc_name(chr, cioc); 966 if (s->registered_yank) { 967 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 968 yank_generic_iochannel, 969 QIO_CHANNEL(cioc)); 970 } 971 tcp_chr_new_client(chr, cioc); 972 } 973 974 975 static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp) 976 { 977 SocketChardev *s = SOCKET_CHARDEV(chr); 978 QIOChannelSocket *sioc = qio_channel_socket_new(); 979 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 980 tcp_chr_set_client_ioc_name(chr, sioc); 981 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) { 982 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 983 object_unref(OBJECT(sioc)); 984 return -1; 985 } 986 if (s->registered_yank) { 987 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 988 yank_generic_iochannel, 989 QIO_CHANNEL(sioc)); 990 } 991 tcp_chr_new_client(chr, sioc); 992 object_unref(OBJECT(sioc)); 993 return 0; 994 } 995 996 997 static void tcp_chr_accept_server_sync(Chardev *chr) 998 { 999 SocketChardev *s = SOCKET_CHARDEV(chr); 1000 QIOChannelSocket *sioc; 1001 info_report("QEMU waiting for connection on: %s", 1002 chr->filename); 1003 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 1004 sioc = qio_net_listener_wait_client(s->listener); 1005 tcp_chr_set_client_ioc_name(chr, sioc); 1006 if (s->registered_yank) { 1007 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 1008 yank_generic_iochannel, 1009 QIO_CHANNEL(sioc)); 1010 } 1011 tcp_chr_new_client(chr, sioc); 1012 object_unref(OBJECT(sioc)); 1013 } 1014 1015 1016 static int tcp_chr_wait_connected(Chardev *chr, Error **errp) 1017 { 1018 SocketChardev *s = SOCKET_CHARDEV(chr); 1019 const char *opts[] = { "telnet", "tn3270", "websock", "tls-creds" }; 1020 bool optset[] = { s->is_telnet, s->is_tn3270, s->is_websock, s->tls_creds }; 1021 size_t i; 1022 1023 QEMU_BUILD_BUG_ON(G_N_ELEMENTS(opts) != G_N_ELEMENTS(optset)); 1024 for (i = 0; i < G_N_ELEMENTS(opts); i++) { 1025 if (optset[i]) { 1026 error_setg(errp, 1027 "'%s' option is incompatible with waiting for " 1028 "connection completion", opts[i]); 1029 return -1; 1030 } 1031 } 1032 1033 tcp_chr_reconn_timer_cancel(s); 1034 1035 /* 1036 * We expect states to be as follows: 1037 * 1038 * - server 1039 * - wait -> CONNECTED 1040 * - nowait -> DISCONNECTED 1041 * - client 1042 * - reconnect == 0 -> CONNECTED 1043 * - reconnect != 0 -> CONNECTING 1044 * 1045 */ 1046 if (s->state == TCP_CHARDEV_STATE_CONNECTING) { 1047 if (!s->connect_task) { 1048 error_setg(errp, 1049 "Unexpected 'connecting' state without connect task " 1050 "while waiting for connection completion"); 1051 return -1; 1052 } 1053 /* 1054 * tcp_chr_wait_connected should only ever be run from the 1055 * main loop thread associated with chr->gcontext, otherwise 1056 * qio_task_wait_thread has a dangerous race condition with 1057 * free'ing of the s->connect_task object. 1058 * 1059 * Acquiring the main context doesn't 100% prove we're in 1060 * the main loop thread, but it does at least guarantee 1061 * that the main loop won't be executed by another thread 1062 * avoiding the race condition with the task idle callback. 1063 */ 1064 g_main_context_acquire(chr->gcontext); 1065 qio_task_wait_thread(s->connect_task); 1066 g_main_context_release(chr->gcontext); 1067 1068 /* 1069 * The completion callback (qemu_chr_socket_connected) for 1070 * s->connect_task should have set this to NULL by the time 1071 * qio_task_wait_thread has returned. 1072 */ 1073 assert(!s->connect_task); 1074 1075 /* 1076 * NB we are *not* guaranteed to have "s->state == ..CONNECTED" 1077 * at this point as this first connect may be failed, so 1078 * allow the next loop to run regardless. 1079 */ 1080 } 1081 1082 while (s->state != TCP_CHARDEV_STATE_CONNECTED) { 1083 if (s->is_listen) { 1084 tcp_chr_accept_server_sync(chr); 1085 } else { 1086 Error *err = NULL; 1087 if (tcp_chr_connect_client_sync(chr, &err) < 0) { 1088 if (s->reconnect_time) { 1089 error_free(err); 1090 g_usleep(s->reconnect_time * 1000ULL * 1000ULL); 1091 } else { 1092 error_propagate(errp, err); 1093 return -1; 1094 } 1095 } 1096 } 1097 } 1098 1099 return 0; 1100 } 1101 1102 static void char_socket_finalize(Object *obj) 1103 { 1104 Chardev *chr = CHARDEV(obj); 1105 SocketChardev *s = SOCKET_CHARDEV(obj); 1106 1107 tcp_chr_free_connection(chr); 1108 tcp_chr_reconn_timer_cancel(s); 1109 qapi_free_SocketAddress(s->addr); 1110 tcp_chr_telnet_destroy(s); 1111 g_free(s->telnet_init); 1112 if (s->listener) { 1113 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 1114 NULL, chr->gcontext); 1115 object_unref(OBJECT(s->listener)); 1116 } 1117 if (s->tls_creds) { 1118 object_unref(OBJECT(s->tls_creds)); 1119 } 1120 g_free(s->tls_authz); 1121 if (s->registered_yank) { 1122 yank_unregister_instance(CHARDEV_YANK_INSTANCE(chr->label)); 1123 } 1124 1125 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 1126 } 1127 1128 static void qemu_chr_socket_connected(QIOTask *task, void *opaque) 1129 { 1130 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1131 Chardev *chr = CHARDEV(opaque); 1132 SocketChardev *s = SOCKET_CHARDEV(chr); 1133 Error *err = NULL; 1134 1135 s->connect_task = NULL; 1136 1137 if (qio_task_propagate_error(task, &err)) { 1138 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 1139 if (s->registered_yank) { 1140 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 1141 yank_generic_iochannel, 1142 QIO_CHANNEL(sioc)); 1143 } 1144 check_report_connect_error(chr, err); 1145 goto cleanup; 1146 } 1147 1148 s->connect_err_reported = false; 1149 tcp_chr_new_client(chr, sioc); 1150 1151 cleanup: 1152 object_unref(OBJECT(sioc)); 1153 } 1154 1155 1156 static void tcp_chr_connect_client_task(QIOTask *task, 1157 gpointer opaque) 1158 { 1159 QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1160 SocketAddress *addr = opaque; 1161 Error *err = NULL; 1162 1163 qio_channel_socket_connect_sync(ioc, addr, &err); 1164 1165 qio_task_set_error(task, err); 1166 } 1167 1168 1169 static void tcp_chr_connect_client_async(Chardev *chr) 1170 { 1171 SocketChardev *s = SOCKET_CHARDEV(chr); 1172 QIOChannelSocket *sioc; 1173 1174 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 1175 sioc = qio_channel_socket_new(); 1176 tcp_chr_set_client_ioc_name(chr, sioc); 1177 if (s->registered_yank) { 1178 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 1179 yank_generic_iochannel, 1180 QIO_CHANNEL(sioc)); 1181 } 1182 /* 1183 * Normally code would use the qio_channel_socket_connect_async 1184 * method which uses a QIOTask + qio_task_set_error internally 1185 * to avoid blocking. The tcp_chr_wait_connected method, however, 1186 * needs a way to synchronize with completion of the background 1187 * connect task which can't be done with the QIOChannelSocket 1188 * async APIs. Thus we must use QIOTask directly to implement 1189 * the non-blocking concept locally. 1190 */ 1191 s->connect_task = qio_task_new(OBJECT(sioc), 1192 qemu_chr_socket_connected, 1193 object_ref(OBJECT(chr)), 1194 (GDestroyNotify)object_unref); 1195 qio_task_run_in_thread(s->connect_task, 1196 tcp_chr_connect_client_task, 1197 s->addr, 1198 NULL, 1199 chr->gcontext); 1200 } 1201 1202 static gboolean socket_reconnect_timeout(gpointer opaque) 1203 { 1204 Chardev *chr = CHARDEV(opaque); 1205 SocketChardev *s = SOCKET_CHARDEV(opaque); 1206 1207 qemu_mutex_lock(&chr->chr_write_lock); 1208 g_source_unref(s->reconnect_timer); 1209 s->reconnect_timer = NULL; 1210 qemu_mutex_unlock(&chr->chr_write_lock); 1211 1212 if (chr->be_open) { 1213 return false; 1214 } 1215 1216 tcp_chr_connect_client_async(chr); 1217 1218 return false; 1219 } 1220 1221 1222 static int qmp_chardev_open_socket_server(Chardev *chr, 1223 bool is_telnet, 1224 bool is_waitconnect, 1225 Error **errp) 1226 { 1227 SocketChardev *s = SOCKET_CHARDEV(chr); 1228 char *name; 1229 if (is_telnet) { 1230 s->do_telnetopt = 1; 1231 } 1232 s->listener = qio_net_listener_new(); 1233 1234 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label); 1235 qio_net_listener_set_name(s->listener, name); 1236 g_free(name); 1237 1238 if (qio_net_listener_open_sync(s->listener, s->addr, 1, errp) < 0) { 1239 object_unref(OBJECT(s->listener)); 1240 s->listener = NULL; 1241 return -1; 1242 } 1243 1244 qapi_free_SocketAddress(s->addr); 1245 s->addr = socket_local_address(s->listener->sioc[0]->fd, errp); 1246 update_disconnected_filename(s); 1247 1248 if (is_waitconnect) { 1249 tcp_chr_accept_server_sync(chr); 1250 } else { 1251 qio_net_listener_set_client_func_full(s->listener, 1252 tcp_chr_accept, 1253 chr, NULL, 1254 chr->gcontext); 1255 } 1256 1257 return 0; 1258 } 1259 1260 1261 static int qmp_chardev_open_socket_client(Chardev *chr, 1262 int64_t reconnect, 1263 Error **errp) 1264 { 1265 SocketChardev *s = SOCKET_CHARDEV(chr); 1266 1267 if (reconnect > 0) { 1268 s->reconnect_time = reconnect; 1269 tcp_chr_connect_client_async(chr); 1270 return 0; 1271 } else { 1272 return tcp_chr_connect_client_sync(chr, errp); 1273 } 1274 } 1275 1276 1277 static bool qmp_chardev_validate_socket(ChardevSocket *sock, 1278 SocketAddress *addr, 1279 Error **errp) 1280 { 1281 /* Validate any options which have a dependency on address type */ 1282 switch (addr->type) { 1283 case SOCKET_ADDRESS_TYPE_FD: 1284 if (sock->has_reconnect) { 1285 error_setg(errp, 1286 "'reconnect' option is incompatible with " 1287 "'fd' address type"); 1288 return false; 1289 } 1290 if (sock->has_tls_creds && 1291 !(sock->has_server && sock->server)) { 1292 error_setg(errp, 1293 "'tls_creds' option is incompatible with " 1294 "'fd' address type as client"); 1295 return false; 1296 } 1297 break; 1298 1299 case SOCKET_ADDRESS_TYPE_UNIX: 1300 if (sock->has_tls_creds) { 1301 error_setg(errp, 1302 "'tls_creds' option is incompatible with " 1303 "'unix' address type"); 1304 return false; 1305 } 1306 break; 1307 1308 case SOCKET_ADDRESS_TYPE_INET: 1309 break; 1310 1311 case SOCKET_ADDRESS_TYPE_VSOCK: 1312 if (sock->has_tls_creds) { 1313 error_setg(errp, 1314 "'tls_creds' option is incompatible with " 1315 "'vsock' address type"); 1316 return false; 1317 } 1318 1319 default: 1320 break; 1321 } 1322 1323 if (sock->has_tls_authz && !sock->has_tls_creds) { 1324 error_setg(errp, "'tls_authz' option requires 'tls_creds' option"); 1325 return false; 1326 } 1327 1328 /* Validate any options which have a dependancy on client vs server */ 1329 if (!sock->has_server || sock->server) { 1330 if (sock->has_reconnect) { 1331 error_setg(errp, 1332 "'reconnect' option is incompatible with " 1333 "socket in server listen mode"); 1334 return false; 1335 } 1336 } else { 1337 if (sock->has_websocket && sock->websocket) { 1338 error_setg(errp, "%s", "Websocket client is not implemented"); 1339 return false; 1340 } 1341 if (sock->has_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 return true; 1350 } 1351 1352 1353 static void qmp_chardev_open_socket(Chardev *chr, 1354 ChardevBackend *backend, 1355 bool *be_opened, 1356 Error **errp) 1357 { 1358 SocketChardev *s = SOCKET_CHARDEV(chr); 1359 ChardevSocket *sock = backend->u.socket.data; 1360 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false; 1361 bool is_listen = sock->has_server ? sock->server : true; 1362 bool is_telnet = sock->has_telnet ? sock->telnet : false; 1363 bool is_tn3270 = sock->has_tn3270 ? sock->tn3270 : false; 1364 bool is_waitconnect = sock->has_wait ? sock->wait : false; 1365 bool is_websock = sock->has_websocket ? sock->websocket : false; 1366 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; 1367 SocketAddress *addr; 1368 1369 s->is_listen = is_listen; 1370 s->is_telnet = is_telnet; 1371 s->is_tn3270 = is_tn3270; 1372 s->is_websock = is_websock; 1373 s->do_nodelay = do_nodelay; 1374 if (sock->tls_creds) { 1375 Object *creds; 1376 creds = object_resolve_path_component( 1377 object_get_objects_root(), sock->tls_creds); 1378 if (!creds) { 1379 error_setg(errp, "No TLS credentials with id '%s'", 1380 sock->tls_creds); 1381 return; 1382 } 1383 s->tls_creds = (QCryptoTLSCreds *) 1384 object_dynamic_cast(creds, 1385 TYPE_QCRYPTO_TLS_CREDS); 1386 if (!s->tls_creds) { 1387 error_setg(errp, "Object with id '%s' is not TLS credentials", 1388 sock->tls_creds); 1389 return; 1390 } 1391 object_ref(OBJECT(s->tls_creds)); 1392 if (is_listen) { 1393 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 1394 error_setg(errp, "%s", 1395 "Expected TLS credentials for server endpoint"); 1396 return; 1397 } 1398 } else { 1399 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { 1400 error_setg(errp, "%s", 1401 "Expected TLS credentials for client endpoint"); 1402 return; 1403 } 1404 } 1405 } 1406 s->tls_authz = g_strdup(sock->tls_authz); 1407 1408 s->addr = addr = socket_address_flatten(sock->addr); 1409 1410 if (!qmp_chardev_validate_socket(sock, addr, errp)) { 1411 return; 1412 } 1413 1414 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); 1415 /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */ 1416 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) { 1417 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); 1418 } 1419 1420 if (!yank_register_instance(CHARDEV_YANK_INSTANCE(chr->label), errp)) { 1421 return; 1422 } 1423 s->registered_yank = true; 1424 1425 /* be isn't opened until we get a connection */ 1426 *be_opened = false; 1427 1428 update_disconnected_filename(s); 1429 1430 if (s->is_listen) { 1431 if (qmp_chardev_open_socket_server(chr, is_telnet || is_tn3270, 1432 is_waitconnect, errp) < 0) { 1433 return; 1434 } 1435 } else { 1436 if (qmp_chardev_open_socket_client(chr, reconnect, errp) < 0) { 1437 return; 1438 } 1439 } 1440 } 1441 1442 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend, 1443 Error **errp) 1444 { 1445 const char *path = qemu_opt_get(opts, "path"); 1446 const char *host = qemu_opt_get(opts, "host"); 1447 const char *port = qemu_opt_get(opts, "port"); 1448 const char *fd = qemu_opt_get(opts, "fd"); 1449 #ifdef CONFIG_LINUX 1450 bool tight = qemu_opt_get_bool(opts, "tight", true); 1451 bool abstract = qemu_opt_get_bool(opts, "abstract", false); 1452 #endif 1453 SocketAddressLegacy *addr; 1454 ChardevSocket *sock; 1455 1456 if ((!!path + !!fd + !!host) != 1) { 1457 error_setg(errp, 1458 "Exactly one of 'path', 'fd' or 'host' required"); 1459 return; 1460 } 1461 1462 if (host && !port) { 1463 error_setg(errp, "chardev: socket: no port given"); 1464 return; 1465 } 1466 1467 backend->type = CHARDEV_BACKEND_KIND_SOCKET; 1468 sock = backend->u.socket.data = g_new0(ChardevSocket, 1); 1469 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock)); 1470 1471 if (qemu_opt_get(opts, "delay") && qemu_opt_get(opts, "nodelay")) { 1472 error_setg(errp, "'delay' and 'nodelay' are mutually exclusive"); 1473 return; 1474 } 1475 sock->has_nodelay = 1476 qemu_opt_get(opts, "delay") || 1477 qemu_opt_get(opts, "nodelay"); 1478 sock->nodelay = 1479 !qemu_opt_get_bool(opts, "delay", true) || 1480 qemu_opt_get_bool(opts, "nodelay", false); 1481 1482 /* 1483 * We have different default to QMP for 'server', hence 1484 * we can't just check for existence of 'server' 1485 */ 1486 sock->has_server = true; 1487 sock->server = qemu_opt_get_bool(opts, "server", false); 1488 sock->has_telnet = qemu_opt_get(opts, "telnet"); 1489 sock->telnet = qemu_opt_get_bool(opts, "telnet", false); 1490 sock->has_tn3270 = qemu_opt_get(opts, "tn3270"); 1491 sock->tn3270 = qemu_opt_get_bool(opts, "tn3270", false); 1492 sock->has_websocket = qemu_opt_get(opts, "websocket"); 1493 sock->websocket = qemu_opt_get_bool(opts, "websocket", false); 1494 /* 1495 * We have different default to QMP for 'wait' when 'server' 1496 * is set, hence we can't just check for existence of 'wait' 1497 */ 1498 sock->has_wait = qemu_opt_find(opts, "wait") || sock->server; 1499 sock->wait = qemu_opt_get_bool(opts, "wait", true); 1500 sock->has_reconnect = qemu_opt_find(opts, "reconnect"); 1501 sock->reconnect = qemu_opt_get_number(opts, "reconnect", 0); 1502 sock->has_tls_creds = qemu_opt_get(opts, "tls-creds"); 1503 sock->tls_creds = g_strdup(qemu_opt_get(opts, "tls-creds")); 1504 sock->has_tls_authz = qemu_opt_get(opts, "tls-authz"); 1505 sock->tls_authz = g_strdup(qemu_opt_get(opts, "tls-authz")); 1506 1507 addr = g_new0(SocketAddressLegacy, 1); 1508 if (path) { 1509 UnixSocketAddress *q_unix; 1510 addr->type = SOCKET_ADDRESS_LEGACY_KIND_UNIX; 1511 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 1512 q_unix->path = g_strdup(path); 1513 #ifdef CONFIG_LINUX 1514 q_unix->has_tight = true; 1515 q_unix->tight = tight; 1516 q_unix->has_abstract = true; 1517 q_unix->abstract = abstract; 1518 #endif 1519 } else if (host) { 1520 addr->type = SOCKET_ADDRESS_LEGACY_KIND_INET; 1521 addr->u.inet.data = g_new(InetSocketAddress, 1); 1522 *addr->u.inet.data = (InetSocketAddress) { 1523 .host = g_strdup(host), 1524 .port = g_strdup(port), 1525 .has_to = qemu_opt_get(opts, "to"), 1526 .to = qemu_opt_get_number(opts, "to", 0), 1527 .has_ipv4 = qemu_opt_get(opts, "ipv4"), 1528 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), 1529 .has_ipv6 = qemu_opt_get(opts, "ipv6"), 1530 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), 1531 }; 1532 } else if (fd) { 1533 addr->type = SOCKET_ADDRESS_LEGACY_KIND_FD; 1534 addr->u.fd.data = g_new(String, 1); 1535 addr->u.fd.data->str = g_strdup(fd); 1536 } else { 1537 g_assert_not_reached(); 1538 } 1539 sock->addr = addr; 1540 } 1541 1542 static void 1543 char_socket_get_addr(Object *obj, Visitor *v, const char *name, 1544 void *opaque, Error **errp) 1545 { 1546 SocketChardev *s = SOCKET_CHARDEV(obj); 1547 1548 visit_type_SocketAddress(v, name, &s->addr, errp); 1549 } 1550 1551 static bool 1552 char_socket_get_connected(Object *obj, Error **errp) 1553 { 1554 SocketChardev *s = SOCKET_CHARDEV(obj); 1555 1556 return s->state == TCP_CHARDEV_STATE_CONNECTED; 1557 } 1558 1559 static void char_socket_class_init(ObjectClass *oc, void *data) 1560 { 1561 ChardevClass *cc = CHARDEV_CLASS(oc); 1562 1563 cc->parse = qemu_chr_parse_socket; 1564 cc->open = qmp_chardev_open_socket; 1565 cc->chr_wait_connected = tcp_chr_wait_connected; 1566 cc->chr_write = tcp_chr_write; 1567 cc->chr_sync_read = tcp_chr_sync_read; 1568 cc->chr_disconnect = tcp_chr_disconnect; 1569 cc->get_msgfds = tcp_get_msgfds; 1570 cc->set_msgfds = tcp_set_msgfds; 1571 cc->chr_add_client = tcp_chr_add_client; 1572 cc->chr_add_watch = tcp_chr_add_watch; 1573 cc->chr_update_read_handler = tcp_chr_update_read_handler; 1574 1575 object_class_property_add(oc, "addr", "SocketAddress", 1576 char_socket_get_addr, NULL, 1577 NULL, NULL); 1578 1579 object_class_property_add_bool(oc, "connected", char_socket_get_connected, 1580 NULL); 1581 } 1582 1583 static const TypeInfo char_socket_type_info = { 1584 .name = TYPE_CHARDEV_SOCKET, 1585 .parent = TYPE_CHARDEV, 1586 .instance_size = sizeof(SocketChardev), 1587 .instance_finalize = char_socket_finalize, 1588 .class_init = char_socket_class_init, 1589 }; 1590 1591 static void register_types(void) 1592 { 1593 type_register_static(&char_socket_type_info); 1594 } 1595 1596 type_init(register_types); 1597