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 char_socket_yank_iochannel(void *opaque) 406 { 407 QIOChannel *ioc = QIO_CHANNEL(opaque); 408 409 qio_channel_shutdown(ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL); 410 } 411 412 static void tcp_chr_free_connection(Chardev *chr) 413 { 414 SocketChardev *s = SOCKET_CHARDEV(chr); 415 int i; 416 417 if (s->read_msgfds_num) { 418 for (i = 0; i < s->read_msgfds_num; i++) { 419 close(s->read_msgfds[i]); 420 } 421 g_free(s->read_msgfds); 422 s->read_msgfds = NULL; 423 s->read_msgfds_num = 0; 424 } 425 426 remove_hup_source(s); 427 428 tcp_set_msgfds(chr, NULL, 0); 429 remove_fd_in_watch(chr); 430 if (s->registered_yank && 431 (s->state == TCP_CHARDEV_STATE_CONNECTING 432 || s->state == TCP_CHARDEV_STATE_CONNECTED)) { 433 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 434 char_socket_yank_iochannel, 435 QIO_CHANNEL(s->sioc)); 436 } 437 object_unref(OBJECT(s->sioc)); 438 s->sioc = NULL; 439 object_unref(OBJECT(s->ioc)); 440 s->ioc = NULL; 441 g_free(chr->filename); 442 chr->filename = NULL; 443 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 444 } 445 446 static const char *qemu_chr_socket_protocol(SocketChardev *s) 447 { 448 if (s->is_telnet) { 449 return "telnet"; 450 } 451 return s->is_websock ? "websocket" : "tcp"; 452 } 453 454 static char *qemu_chr_socket_address(SocketChardev *s, const char *prefix) 455 { 456 switch (s->addr->type) { 457 case SOCKET_ADDRESS_TYPE_INET: 458 return g_strdup_printf("%s%s:%s:%s%s", prefix, 459 qemu_chr_socket_protocol(s), 460 s->addr->u.inet.host, 461 s->addr->u.inet.port, 462 s->is_listen ? ",server=on" : ""); 463 break; 464 case SOCKET_ADDRESS_TYPE_UNIX: 465 { 466 const char *tight = "", *abstract = ""; 467 UnixSocketAddress *sa = &s->addr->u.q_unix; 468 469 #ifdef CONFIG_LINUX 470 if (sa->has_abstract && sa->abstract) { 471 abstract = ",abstract"; 472 if (sa->has_tight && sa->tight) { 473 tight = ",tight"; 474 } 475 } 476 #endif 477 478 return g_strdup_printf("%sunix:%s%s%s%s", prefix, sa->path, 479 abstract, tight, 480 s->is_listen ? ",server=on" : ""); 481 break; 482 } 483 case SOCKET_ADDRESS_TYPE_FD: 484 return g_strdup_printf("%sfd:%s%s", prefix, s->addr->u.fd.str, 485 s->is_listen ? ",server=on" : ""); 486 break; 487 case SOCKET_ADDRESS_TYPE_VSOCK: 488 return g_strdup_printf("%svsock:%s:%s", prefix, 489 s->addr->u.vsock.cid, 490 s->addr->u.vsock.port); 491 default: 492 abort(); 493 } 494 } 495 496 static void update_disconnected_filename(SocketChardev *s) 497 { 498 Chardev *chr = CHARDEV(s); 499 500 g_free(chr->filename); 501 if (s->addr) { 502 chr->filename = qemu_chr_socket_address(s, "disconnected:"); 503 } else { 504 chr->filename = g_strdup("disconnected:socket"); 505 } 506 } 507 508 /* NB may be called even if tcp_chr_connect has not been 509 * reached, due to TLS or telnet initialization failure, 510 * so can *not* assume s->state == TCP_CHARDEV_STATE_CONNECTED 511 * This must be called with chr->chr_write_lock held. 512 */ 513 static void tcp_chr_disconnect_locked(Chardev *chr) 514 { 515 SocketChardev *s = SOCKET_CHARDEV(chr); 516 bool emit_close = s->state == TCP_CHARDEV_STATE_CONNECTED; 517 518 tcp_chr_free_connection(chr); 519 520 if (s->listener) { 521 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 522 chr, NULL, chr->gcontext); 523 } 524 update_disconnected_filename(s); 525 if (emit_close) { 526 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 527 } 528 if (s->reconnect_time && !s->reconnect_timer) { 529 qemu_chr_socket_restart_timer(chr); 530 } 531 } 532 533 static void tcp_chr_disconnect(Chardev *chr) 534 { 535 qemu_mutex_lock(&chr->chr_write_lock); 536 tcp_chr_disconnect_locked(chr); 537 qemu_mutex_unlock(&chr->chr_write_lock); 538 } 539 540 static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) 541 { 542 Chardev *chr = CHARDEV(opaque); 543 SocketChardev *s = SOCKET_CHARDEV(opaque); 544 uint8_t buf[CHR_READ_BUF_LEN]; 545 int len, size; 546 547 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) || 548 s->max_size <= 0) { 549 return TRUE; 550 } 551 len = sizeof(buf); 552 if (len > s->max_size) { 553 len = s->max_size; 554 } 555 size = tcp_chr_recv(chr, (void *)buf, len); 556 if (size == 0 || (size == -1 && errno != EAGAIN)) { 557 /* connection closed */ 558 tcp_chr_disconnect(chr); 559 } else if (size > 0) { 560 if (s->do_telnetopt) { 561 tcp_chr_process_IAC_bytes(chr, s, buf, &size); 562 } 563 if (size > 0) { 564 qemu_chr_be_write(chr, buf, size); 565 } 566 } 567 568 return TRUE; 569 } 570 571 static gboolean tcp_chr_hup(QIOChannel *channel, 572 GIOCondition cond, 573 void *opaque) 574 { 575 Chardev *chr = CHARDEV(opaque); 576 tcp_chr_disconnect(chr); 577 return G_SOURCE_REMOVE; 578 } 579 580 static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len) 581 { 582 SocketChardev *s = SOCKET_CHARDEV(chr); 583 int size; 584 585 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 586 return 0; 587 } 588 589 qio_channel_set_blocking(s->ioc, true, NULL); 590 size = tcp_chr_recv(chr, (void *) buf, len); 591 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 592 qio_channel_set_blocking(s->ioc, false, NULL); 593 } 594 if (size == 0) { 595 /* connection closed */ 596 tcp_chr_disconnect(chr); 597 } 598 599 return size; 600 } 601 602 static char *qemu_chr_compute_filename(SocketChardev *s) 603 { 604 struct sockaddr_storage *ss = &s->sioc->localAddr; 605 struct sockaddr_storage *ps = &s->sioc->remoteAddr; 606 socklen_t ss_len = s->sioc->localAddrLen; 607 socklen_t ps_len = s->sioc->remoteAddrLen; 608 char shost[NI_MAXHOST], sserv[NI_MAXSERV]; 609 char phost[NI_MAXHOST], pserv[NI_MAXSERV]; 610 const char *left = "", *right = ""; 611 612 switch (ss->ss_family) { 613 #ifndef _WIN32 614 case AF_UNIX: 615 return g_strdup_printf("unix:%s%s", 616 ((struct sockaddr_un *)(ss))->sun_path, 617 s->is_listen ? ",server=on" : ""); 618 #endif 619 case AF_INET6: 620 left = "["; 621 right = "]"; 622 /* fall through */ 623 case AF_INET: 624 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost), 625 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV); 626 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost), 627 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV); 628 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s", 629 qemu_chr_socket_protocol(s), 630 left, shost, right, sserv, 631 s->is_listen ? ",server=on" : "", 632 left, phost, right, pserv); 633 634 default: 635 return g_strdup_printf("unknown"); 636 } 637 } 638 639 static void update_ioc_handlers(SocketChardev *s) 640 { 641 Chardev *chr = CHARDEV(s); 642 643 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 644 return; 645 } 646 647 remove_fd_in_watch(chr); 648 chr->gsource = io_add_watch_poll(chr, s->ioc, 649 tcp_chr_read_poll, 650 tcp_chr_read, chr, 651 chr->gcontext); 652 653 remove_hup_source(s); 654 s->hup_source = qio_channel_create_watch(s->ioc, G_IO_HUP); 655 g_source_set_callback(s->hup_source, (GSourceFunc)tcp_chr_hup, 656 chr, NULL); 657 g_source_attach(s->hup_source, chr->gcontext); 658 } 659 660 static void tcp_chr_connect(void *opaque) 661 { 662 Chardev *chr = CHARDEV(opaque); 663 SocketChardev *s = SOCKET_CHARDEV(opaque); 664 665 g_free(chr->filename); 666 chr->filename = qemu_chr_compute_filename(s); 667 668 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTED); 669 update_ioc_handlers(s); 670 qemu_chr_be_event(chr, CHR_EVENT_OPENED); 671 } 672 673 static void tcp_chr_telnet_destroy(SocketChardev *s) 674 { 675 if (s->telnet_source) { 676 g_source_destroy(s->telnet_source); 677 g_source_unref(s->telnet_source); 678 s->telnet_source = NULL; 679 } 680 } 681 682 static void tcp_chr_update_read_handler(Chardev *chr) 683 { 684 SocketChardev *s = SOCKET_CHARDEV(chr); 685 686 if (s->listener && s->state == TCP_CHARDEV_STATE_DISCONNECTED) { 687 /* 688 * It's possible that chardev context is changed in 689 * qemu_chr_be_update_read_handlers(). Reset it for QIO net 690 * listener if there is. 691 */ 692 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 693 chr, NULL, chr->gcontext); 694 } 695 696 if (s->telnet_source) { 697 tcp_chr_telnet_init(CHARDEV(s)); 698 } 699 700 update_ioc_handlers(s); 701 } 702 703 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, 704 GIOCondition cond G_GNUC_UNUSED, 705 gpointer user_data) 706 { 707 SocketChardev *s = user_data; 708 Chardev *chr = CHARDEV(s); 709 TCPChardevTelnetInit *init = s->telnet_init; 710 ssize_t ret; 711 712 assert(init); 713 714 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL); 715 if (ret < 0) { 716 if (ret == QIO_CHANNEL_ERR_BLOCK) { 717 ret = 0; 718 } else { 719 tcp_chr_disconnect(chr); 720 goto end; 721 } 722 } 723 init->buflen -= ret; 724 725 if (init->buflen == 0) { 726 tcp_chr_connect(chr); 727 goto end; 728 } 729 730 memmove(init->buf, init->buf + ret, init->buflen); 731 732 return G_SOURCE_CONTINUE; 733 734 end: 735 g_free(s->telnet_init); 736 s->telnet_init = NULL; 737 g_source_unref(s->telnet_source); 738 s->telnet_source = NULL; 739 return G_SOURCE_REMOVE; 740 } 741 742 static void tcp_chr_telnet_init(Chardev *chr) 743 { 744 SocketChardev *s = SOCKET_CHARDEV(chr); 745 TCPChardevTelnetInit *init; 746 size_t n = 0; 747 748 /* Destroy existing task */ 749 tcp_chr_telnet_destroy(s); 750 751 if (s->telnet_init) { 752 /* We are possibly during a handshake already */ 753 goto cont; 754 } 755 756 s->telnet_init = g_new0(TCPChardevTelnetInit, 1); 757 init = s->telnet_init; 758 759 #define IACSET(x, a, b, c) \ 760 do { \ 761 x[n++] = a; \ 762 x[n++] = b; \ 763 x[n++] = c; \ 764 } while (0) 765 766 if (!s->is_tn3270) { 767 init->buflen = 12; 768 /* Prep the telnet negotion to put telnet in binary, 769 * no echo, single char mode */ 770 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ 771 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ 772 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ 773 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ 774 } else { 775 init->buflen = 21; 776 /* Prep the TN3270 negotion based on RFC1576 */ 777 IACSET(init->buf, 0xff, 0xfd, 0x19); /* IAC DO EOR */ 778 IACSET(init->buf, 0xff, 0xfb, 0x19); /* IAC WILL EOR */ 779 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO BINARY */ 780 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL BINARY */ 781 IACSET(init->buf, 0xff, 0xfd, 0x18); /* IAC DO TERMINAL TYPE */ 782 IACSET(init->buf, 0xff, 0xfa, 0x18); /* IAC SB TERMINAL TYPE */ 783 IACSET(init->buf, 0x01, 0xff, 0xf0); /* SEND IAC SE */ 784 } 785 786 #undef IACSET 787 788 cont: 789 s->telnet_source = qio_channel_add_watch_source(s->ioc, G_IO_OUT, 790 tcp_chr_telnet_init_io, 791 s, NULL, 792 chr->gcontext); 793 } 794 795 796 static void tcp_chr_websock_handshake(QIOTask *task, gpointer user_data) 797 { 798 Chardev *chr = user_data; 799 SocketChardev *s = user_data; 800 801 if (qio_task_propagate_error(task, NULL)) { 802 tcp_chr_disconnect(chr); 803 } else { 804 if (s->do_telnetopt) { 805 tcp_chr_telnet_init(chr); 806 } else { 807 tcp_chr_connect(chr); 808 } 809 } 810 } 811 812 813 static void tcp_chr_websock_init(Chardev *chr) 814 { 815 SocketChardev *s = SOCKET_CHARDEV(chr); 816 QIOChannelWebsock *wioc = NULL; 817 gchar *name; 818 819 wioc = qio_channel_websock_new_server(s->ioc); 820 821 name = g_strdup_printf("chardev-websocket-server-%s", chr->label); 822 qio_channel_set_name(QIO_CHANNEL(wioc), name); 823 g_free(name); 824 object_unref(OBJECT(s->ioc)); 825 s->ioc = QIO_CHANNEL(wioc); 826 827 qio_channel_websock_handshake(wioc, tcp_chr_websock_handshake, chr, NULL); 828 } 829 830 831 static void tcp_chr_tls_handshake(QIOTask *task, 832 gpointer user_data) 833 { 834 Chardev *chr = user_data; 835 SocketChardev *s = user_data; 836 837 if (qio_task_propagate_error(task, NULL)) { 838 tcp_chr_disconnect(chr); 839 } else { 840 if (s->is_websock) { 841 tcp_chr_websock_init(chr); 842 } else if (s->do_telnetopt) { 843 tcp_chr_telnet_init(chr); 844 } else { 845 tcp_chr_connect(chr); 846 } 847 } 848 } 849 850 851 static void tcp_chr_tls_init(Chardev *chr) 852 { 853 SocketChardev *s = SOCKET_CHARDEV(chr); 854 QIOChannelTLS *tioc; 855 gchar *name; 856 857 if (s->is_listen) { 858 tioc = qio_channel_tls_new_server( 859 s->ioc, s->tls_creds, 860 s->tls_authz, 861 NULL); 862 } else { 863 tioc = qio_channel_tls_new_client( 864 s->ioc, s->tls_creds, 865 s->addr->u.inet.host, 866 NULL); 867 } 868 if (tioc == NULL) { 869 tcp_chr_disconnect(chr); 870 return; 871 } 872 name = g_strdup_printf("chardev-tls-%s-%s", 873 s->is_listen ? "server" : "client", 874 chr->label); 875 qio_channel_set_name(QIO_CHANNEL(tioc), name); 876 g_free(name); 877 object_unref(OBJECT(s->ioc)); 878 s->ioc = QIO_CHANNEL(tioc); 879 880 qio_channel_tls_handshake(tioc, 881 tcp_chr_tls_handshake, 882 chr, 883 NULL, 884 chr->gcontext); 885 } 886 887 888 static void tcp_chr_set_client_ioc_name(Chardev *chr, 889 QIOChannelSocket *sioc) 890 { 891 SocketChardev *s = SOCKET_CHARDEV(chr); 892 char *name; 893 name = g_strdup_printf("chardev-tcp-%s-%s", 894 s->is_listen ? "server" : "client", 895 chr->label); 896 qio_channel_set_name(QIO_CHANNEL(sioc), name); 897 g_free(name); 898 899 } 900 901 static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc) 902 { 903 SocketChardev *s = SOCKET_CHARDEV(chr); 904 905 if (s->state != TCP_CHARDEV_STATE_CONNECTING) { 906 return -1; 907 } 908 909 s->ioc = QIO_CHANNEL(sioc); 910 object_ref(OBJECT(sioc)); 911 s->sioc = sioc; 912 object_ref(OBJECT(sioc)); 913 914 qio_channel_set_blocking(s->ioc, false, NULL); 915 916 if (s->do_nodelay) { 917 qio_channel_set_delay(s->ioc, false); 918 } 919 if (s->listener) { 920 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 921 NULL, chr->gcontext); 922 } 923 924 if (s->tls_creds) { 925 tcp_chr_tls_init(chr); 926 } else if (s->is_websock) { 927 tcp_chr_websock_init(chr); 928 } else if (s->do_telnetopt) { 929 tcp_chr_telnet_init(chr); 930 } else { 931 tcp_chr_connect(chr); 932 } 933 934 return 0; 935 } 936 937 938 static int tcp_chr_add_client(Chardev *chr, int fd) 939 { 940 int ret; 941 QIOChannelSocket *sioc; 942 SocketChardev *s = SOCKET_CHARDEV(chr); 943 944 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 945 return -1; 946 } 947 948 sioc = qio_channel_socket_new_fd(fd, NULL); 949 if (!sioc) { 950 return -1; 951 } 952 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 953 tcp_chr_set_client_ioc_name(chr, sioc); 954 if (s->registered_yank) { 955 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 956 char_socket_yank_iochannel, 957 QIO_CHANNEL(sioc)); 958 } 959 ret = tcp_chr_new_client(chr, sioc); 960 object_unref(OBJECT(sioc)); 961 return ret; 962 } 963 964 static void tcp_chr_accept(QIONetListener *listener, 965 QIOChannelSocket *cioc, 966 void *opaque) 967 { 968 Chardev *chr = CHARDEV(opaque); 969 SocketChardev *s = SOCKET_CHARDEV(chr); 970 971 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 972 tcp_chr_set_client_ioc_name(chr, cioc); 973 if (s->registered_yank) { 974 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 975 char_socket_yank_iochannel, 976 QIO_CHANNEL(cioc)); 977 } 978 tcp_chr_new_client(chr, cioc); 979 } 980 981 982 static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp) 983 { 984 SocketChardev *s = SOCKET_CHARDEV(chr); 985 QIOChannelSocket *sioc = qio_channel_socket_new(); 986 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 987 tcp_chr_set_client_ioc_name(chr, sioc); 988 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) { 989 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 990 object_unref(OBJECT(sioc)); 991 return -1; 992 } 993 if (s->registered_yank) { 994 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 995 char_socket_yank_iochannel, 996 QIO_CHANNEL(sioc)); 997 } 998 tcp_chr_new_client(chr, sioc); 999 object_unref(OBJECT(sioc)); 1000 return 0; 1001 } 1002 1003 1004 static void tcp_chr_accept_server_sync(Chardev *chr) 1005 { 1006 SocketChardev *s = SOCKET_CHARDEV(chr); 1007 QIOChannelSocket *sioc; 1008 info_report("QEMU waiting for connection on: %s", 1009 chr->filename); 1010 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 1011 sioc = qio_net_listener_wait_client(s->listener); 1012 tcp_chr_set_client_ioc_name(chr, sioc); 1013 if (s->registered_yank) { 1014 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 1015 char_socket_yank_iochannel, 1016 QIO_CHANNEL(sioc)); 1017 } 1018 tcp_chr_new_client(chr, sioc); 1019 object_unref(OBJECT(sioc)); 1020 } 1021 1022 1023 static int tcp_chr_wait_connected(Chardev *chr, Error **errp) 1024 { 1025 SocketChardev *s = SOCKET_CHARDEV(chr); 1026 const char *opts[] = { "telnet", "tn3270", "websock", "tls-creds" }; 1027 bool optset[] = { s->is_telnet, s->is_tn3270, s->is_websock, s->tls_creds }; 1028 size_t i; 1029 1030 QEMU_BUILD_BUG_ON(G_N_ELEMENTS(opts) != G_N_ELEMENTS(optset)); 1031 for (i = 0; i < G_N_ELEMENTS(opts); i++) { 1032 if (optset[i]) { 1033 error_setg(errp, 1034 "'%s' option is incompatible with waiting for " 1035 "connection completion", opts[i]); 1036 return -1; 1037 } 1038 } 1039 1040 tcp_chr_reconn_timer_cancel(s); 1041 1042 /* 1043 * We expect states to be as follows: 1044 * 1045 * - server 1046 * - wait -> CONNECTED 1047 * - nowait -> DISCONNECTED 1048 * - client 1049 * - reconnect == 0 -> CONNECTED 1050 * - reconnect != 0 -> CONNECTING 1051 * 1052 */ 1053 if (s->state == TCP_CHARDEV_STATE_CONNECTING) { 1054 if (!s->connect_task) { 1055 error_setg(errp, 1056 "Unexpected 'connecting' state without connect task " 1057 "while waiting for connection completion"); 1058 return -1; 1059 } 1060 /* 1061 * tcp_chr_wait_connected should only ever be run from the 1062 * main loop thread associated with chr->gcontext, otherwise 1063 * qio_task_wait_thread has a dangerous race condition with 1064 * free'ing of the s->connect_task object. 1065 * 1066 * Acquiring the main context doesn't 100% prove we're in 1067 * the main loop thread, but it does at least guarantee 1068 * that the main loop won't be executed by another thread 1069 * avoiding the race condition with the task idle callback. 1070 */ 1071 g_main_context_acquire(chr->gcontext); 1072 qio_task_wait_thread(s->connect_task); 1073 g_main_context_release(chr->gcontext); 1074 1075 /* 1076 * The completion callback (qemu_chr_socket_connected) for 1077 * s->connect_task should have set this to NULL by the time 1078 * qio_task_wait_thread has returned. 1079 */ 1080 assert(!s->connect_task); 1081 1082 /* 1083 * NB we are *not* guaranteed to have "s->state == ..CONNECTED" 1084 * at this point as this first connect may be failed, so 1085 * allow the next loop to run regardless. 1086 */ 1087 } 1088 1089 while (s->state != TCP_CHARDEV_STATE_CONNECTED) { 1090 if (s->is_listen) { 1091 tcp_chr_accept_server_sync(chr); 1092 } else { 1093 Error *err = NULL; 1094 if (tcp_chr_connect_client_sync(chr, &err) < 0) { 1095 if (s->reconnect_time) { 1096 error_free(err); 1097 g_usleep(s->reconnect_time * 1000ULL * 1000ULL); 1098 } else { 1099 error_propagate(errp, err); 1100 return -1; 1101 } 1102 } 1103 } 1104 } 1105 1106 return 0; 1107 } 1108 1109 static void char_socket_finalize(Object *obj) 1110 { 1111 Chardev *chr = CHARDEV(obj); 1112 SocketChardev *s = SOCKET_CHARDEV(obj); 1113 1114 tcp_chr_free_connection(chr); 1115 tcp_chr_reconn_timer_cancel(s); 1116 qapi_free_SocketAddress(s->addr); 1117 tcp_chr_telnet_destroy(s); 1118 g_free(s->telnet_init); 1119 if (s->listener) { 1120 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 1121 NULL, chr->gcontext); 1122 object_unref(OBJECT(s->listener)); 1123 } 1124 if (s->tls_creds) { 1125 object_unref(OBJECT(s->tls_creds)); 1126 } 1127 g_free(s->tls_authz); 1128 if (s->registered_yank) { 1129 /* 1130 * In the chardev-change special-case, we shouldn't unregister the yank 1131 * instance, as it still may be needed. 1132 */ 1133 if (!chr->handover_yank_instance) { 1134 yank_unregister_instance(CHARDEV_YANK_INSTANCE(chr->label)); 1135 } 1136 } 1137 1138 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 1139 } 1140 1141 static void qemu_chr_socket_connected(QIOTask *task, void *opaque) 1142 { 1143 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1144 Chardev *chr = CHARDEV(opaque); 1145 SocketChardev *s = SOCKET_CHARDEV(chr); 1146 Error *err = NULL; 1147 1148 s->connect_task = NULL; 1149 1150 if (qio_task_propagate_error(task, &err)) { 1151 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 1152 if (s->registered_yank) { 1153 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 1154 char_socket_yank_iochannel, 1155 QIO_CHANNEL(sioc)); 1156 } 1157 check_report_connect_error(chr, err); 1158 goto cleanup; 1159 } 1160 1161 s->connect_err_reported = false; 1162 tcp_chr_new_client(chr, sioc); 1163 1164 cleanup: 1165 object_unref(OBJECT(sioc)); 1166 } 1167 1168 1169 static void tcp_chr_connect_client_task(QIOTask *task, 1170 gpointer opaque) 1171 { 1172 QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1173 SocketAddress *addr = opaque; 1174 Error *err = NULL; 1175 1176 qio_channel_socket_connect_sync(ioc, addr, &err); 1177 1178 qio_task_set_error(task, err); 1179 } 1180 1181 1182 static void tcp_chr_connect_client_async(Chardev *chr) 1183 { 1184 SocketChardev *s = SOCKET_CHARDEV(chr); 1185 QIOChannelSocket *sioc; 1186 1187 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 1188 sioc = qio_channel_socket_new(); 1189 tcp_chr_set_client_ioc_name(chr, sioc); 1190 if (s->registered_yank) { 1191 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 1192 char_socket_yank_iochannel, 1193 QIO_CHANNEL(sioc)); 1194 } 1195 /* 1196 * Normally code would use the qio_channel_socket_connect_async 1197 * method which uses a QIOTask + qio_task_set_error internally 1198 * to avoid blocking. The tcp_chr_wait_connected method, however, 1199 * needs a way to synchronize with completion of the background 1200 * connect task which can't be done with the QIOChannelSocket 1201 * async APIs. Thus we must use QIOTask directly to implement 1202 * the non-blocking concept locally. 1203 */ 1204 s->connect_task = qio_task_new(OBJECT(sioc), 1205 qemu_chr_socket_connected, 1206 object_ref(OBJECT(chr)), 1207 (GDestroyNotify)object_unref); 1208 qio_task_run_in_thread(s->connect_task, 1209 tcp_chr_connect_client_task, 1210 s->addr, 1211 NULL, 1212 chr->gcontext); 1213 } 1214 1215 static gboolean socket_reconnect_timeout(gpointer opaque) 1216 { 1217 Chardev *chr = CHARDEV(opaque); 1218 SocketChardev *s = SOCKET_CHARDEV(opaque); 1219 1220 qemu_mutex_lock(&chr->chr_write_lock); 1221 g_source_unref(s->reconnect_timer); 1222 s->reconnect_timer = NULL; 1223 qemu_mutex_unlock(&chr->chr_write_lock); 1224 1225 if (chr->be_open) { 1226 return false; 1227 } 1228 1229 tcp_chr_connect_client_async(chr); 1230 1231 return false; 1232 } 1233 1234 1235 static int qmp_chardev_open_socket_server(Chardev *chr, 1236 bool is_telnet, 1237 bool is_waitconnect, 1238 Error **errp) 1239 { 1240 SocketChardev *s = SOCKET_CHARDEV(chr); 1241 char *name; 1242 if (is_telnet) { 1243 s->do_telnetopt = 1; 1244 } 1245 s->listener = qio_net_listener_new(); 1246 1247 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label); 1248 qio_net_listener_set_name(s->listener, name); 1249 g_free(name); 1250 1251 if (qio_net_listener_open_sync(s->listener, s->addr, 1, errp) < 0) { 1252 object_unref(OBJECT(s->listener)); 1253 s->listener = NULL; 1254 return -1; 1255 } 1256 1257 qapi_free_SocketAddress(s->addr); 1258 s->addr = socket_local_address(s->listener->sioc[0]->fd, errp); 1259 update_disconnected_filename(s); 1260 1261 if (is_waitconnect) { 1262 tcp_chr_accept_server_sync(chr); 1263 } else { 1264 qio_net_listener_set_client_func_full(s->listener, 1265 tcp_chr_accept, 1266 chr, NULL, 1267 chr->gcontext); 1268 } 1269 1270 return 0; 1271 } 1272 1273 1274 static int qmp_chardev_open_socket_client(Chardev *chr, 1275 int64_t reconnect, 1276 Error **errp) 1277 { 1278 SocketChardev *s = SOCKET_CHARDEV(chr); 1279 1280 if (reconnect > 0) { 1281 s->reconnect_time = reconnect; 1282 tcp_chr_connect_client_async(chr); 1283 return 0; 1284 } else { 1285 return tcp_chr_connect_client_sync(chr, errp); 1286 } 1287 } 1288 1289 1290 static bool qmp_chardev_validate_socket(ChardevSocket *sock, 1291 SocketAddress *addr, 1292 Error **errp) 1293 { 1294 /* Validate any options which have a dependency on address type */ 1295 switch (addr->type) { 1296 case SOCKET_ADDRESS_TYPE_FD: 1297 if (sock->has_reconnect) { 1298 error_setg(errp, 1299 "'reconnect' option is incompatible with " 1300 "'fd' address type"); 1301 return false; 1302 } 1303 if (sock->has_tls_creds && 1304 !(sock->has_server && sock->server)) { 1305 error_setg(errp, 1306 "'tls_creds' option is incompatible with " 1307 "'fd' address type as client"); 1308 return false; 1309 } 1310 break; 1311 1312 case SOCKET_ADDRESS_TYPE_UNIX: 1313 if (sock->has_tls_creds) { 1314 error_setg(errp, 1315 "'tls_creds' option is incompatible with " 1316 "'unix' address type"); 1317 return false; 1318 } 1319 break; 1320 1321 case SOCKET_ADDRESS_TYPE_INET: 1322 break; 1323 1324 case SOCKET_ADDRESS_TYPE_VSOCK: 1325 if (sock->has_tls_creds) { 1326 error_setg(errp, 1327 "'tls_creds' option is incompatible with " 1328 "'vsock' address type"); 1329 return false; 1330 } 1331 1332 default: 1333 break; 1334 } 1335 1336 if (sock->has_tls_authz && !sock->has_tls_creds) { 1337 error_setg(errp, "'tls_authz' option requires 'tls_creds' option"); 1338 return false; 1339 } 1340 1341 /* Validate any options which have a dependancy on client vs server */ 1342 if (!sock->has_server || sock->server) { 1343 if (sock->has_reconnect) { 1344 error_setg(errp, 1345 "'reconnect' option is incompatible with " 1346 "socket in server listen mode"); 1347 return false; 1348 } 1349 } else { 1350 if (sock->has_websocket && sock->websocket) { 1351 error_setg(errp, "%s", "Websocket client is not implemented"); 1352 return false; 1353 } 1354 if (sock->has_wait) { 1355 error_setg(errp, "%s", 1356 "'wait' option is incompatible with " 1357 "socket in client connect mode"); 1358 return false; 1359 } 1360 } 1361 1362 return true; 1363 } 1364 1365 1366 static void qmp_chardev_open_socket(Chardev *chr, 1367 ChardevBackend *backend, 1368 bool *be_opened, 1369 Error **errp) 1370 { 1371 SocketChardev *s = SOCKET_CHARDEV(chr); 1372 ChardevSocket *sock = backend->u.socket.data; 1373 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false; 1374 bool is_listen = sock->has_server ? sock->server : true; 1375 bool is_telnet = sock->has_telnet ? sock->telnet : false; 1376 bool is_tn3270 = sock->has_tn3270 ? sock->tn3270 : false; 1377 bool is_waitconnect = sock->has_wait ? sock->wait : false; 1378 bool is_websock = sock->has_websocket ? sock->websocket : false; 1379 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; 1380 SocketAddress *addr; 1381 1382 s->is_listen = is_listen; 1383 s->is_telnet = is_telnet; 1384 s->is_tn3270 = is_tn3270; 1385 s->is_websock = is_websock; 1386 s->do_nodelay = do_nodelay; 1387 if (sock->tls_creds) { 1388 Object *creds; 1389 creds = object_resolve_path_component( 1390 object_get_objects_root(), sock->tls_creds); 1391 if (!creds) { 1392 error_setg(errp, "No TLS credentials with id '%s'", 1393 sock->tls_creds); 1394 return; 1395 } 1396 s->tls_creds = (QCryptoTLSCreds *) 1397 object_dynamic_cast(creds, 1398 TYPE_QCRYPTO_TLS_CREDS); 1399 if (!s->tls_creds) { 1400 error_setg(errp, "Object with id '%s' is not TLS credentials", 1401 sock->tls_creds); 1402 return; 1403 } 1404 object_ref(OBJECT(s->tls_creds)); 1405 if (!qcrypto_tls_creds_check_endpoint(s->tls_creds, 1406 is_listen 1407 ? QCRYPTO_TLS_CREDS_ENDPOINT_SERVER 1408 : QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT, 1409 errp)) { 1410 return; 1411 } 1412 } 1413 s->tls_authz = g_strdup(sock->tls_authz); 1414 1415 s->addr = addr = socket_address_flatten(sock->addr); 1416 1417 if (!qmp_chardev_validate_socket(sock, addr, errp)) { 1418 return; 1419 } 1420 1421 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); 1422 /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */ 1423 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) { 1424 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); 1425 } 1426 1427 /* 1428 * In the chardev-change special-case, we shouldn't register a new yank 1429 * instance, as there already may be one. 1430 */ 1431 if (!chr->handover_yank_instance) { 1432 if (!yank_register_instance(CHARDEV_YANK_INSTANCE(chr->label), errp)) { 1433 return; 1434 } 1435 } 1436 s->registered_yank = true; 1437 1438 /* be isn't opened until we get a connection */ 1439 *be_opened = false; 1440 1441 update_disconnected_filename(s); 1442 1443 if (s->is_listen) { 1444 if (qmp_chardev_open_socket_server(chr, is_telnet || is_tn3270, 1445 is_waitconnect, errp) < 0) { 1446 return; 1447 } 1448 } else { 1449 if (qmp_chardev_open_socket_client(chr, reconnect, errp) < 0) { 1450 return; 1451 } 1452 } 1453 } 1454 1455 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend, 1456 Error **errp) 1457 { 1458 const char *path = qemu_opt_get(opts, "path"); 1459 const char *host = qemu_opt_get(opts, "host"); 1460 const char *port = qemu_opt_get(opts, "port"); 1461 const char *fd = qemu_opt_get(opts, "fd"); 1462 #ifdef CONFIG_LINUX 1463 bool tight = qemu_opt_get_bool(opts, "tight", true); 1464 bool abstract = qemu_opt_get_bool(opts, "abstract", false); 1465 #endif 1466 SocketAddressLegacy *addr; 1467 ChardevSocket *sock; 1468 1469 if ((!!path + !!fd + !!host) != 1) { 1470 error_setg(errp, 1471 "Exactly one of 'path', 'fd' or 'host' required"); 1472 return; 1473 } 1474 1475 if (host && !port) { 1476 error_setg(errp, "chardev: socket: no port given"); 1477 return; 1478 } 1479 1480 backend->type = CHARDEV_BACKEND_KIND_SOCKET; 1481 sock = backend->u.socket.data = g_new0(ChardevSocket, 1); 1482 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock)); 1483 1484 if (qemu_opt_get(opts, "delay") && qemu_opt_get(opts, "nodelay")) { 1485 error_setg(errp, "'delay' and 'nodelay' are mutually exclusive"); 1486 return; 1487 } 1488 sock->has_nodelay = 1489 qemu_opt_get(opts, "delay") || 1490 qemu_opt_get(opts, "nodelay"); 1491 sock->nodelay = 1492 !qemu_opt_get_bool(opts, "delay", true) || 1493 qemu_opt_get_bool(opts, "nodelay", false); 1494 1495 /* 1496 * We have different default to QMP for 'server', hence 1497 * we can't just check for existence of 'server' 1498 */ 1499 sock->has_server = true; 1500 sock->server = qemu_opt_get_bool(opts, "server", false); 1501 sock->has_telnet = qemu_opt_get(opts, "telnet"); 1502 sock->telnet = qemu_opt_get_bool(opts, "telnet", false); 1503 sock->has_tn3270 = qemu_opt_get(opts, "tn3270"); 1504 sock->tn3270 = qemu_opt_get_bool(opts, "tn3270", false); 1505 sock->has_websocket = qemu_opt_get(opts, "websocket"); 1506 sock->websocket = qemu_opt_get_bool(opts, "websocket", false); 1507 /* 1508 * We have different default to QMP for 'wait' when 'server' 1509 * is set, hence we can't just check for existence of 'wait' 1510 */ 1511 sock->has_wait = qemu_opt_find(opts, "wait") || sock->server; 1512 sock->wait = qemu_opt_get_bool(opts, "wait", true); 1513 sock->has_reconnect = qemu_opt_find(opts, "reconnect"); 1514 sock->reconnect = qemu_opt_get_number(opts, "reconnect", 0); 1515 sock->has_tls_creds = qemu_opt_get(opts, "tls-creds"); 1516 sock->tls_creds = g_strdup(qemu_opt_get(opts, "tls-creds")); 1517 sock->has_tls_authz = qemu_opt_get(opts, "tls-authz"); 1518 sock->tls_authz = g_strdup(qemu_opt_get(opts, "tls-authz")); 1519 1520 addr = g_new0(SocketAddressLegacy, 1); 1521 if (path) { 1522 UnixSocketAddress *q_unix; 1523 addr->type = SOCKET_ADDRESS_LEGACY_KIND_UNIX; 1524 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 1525 q_unix->path = g_strdup(path); 1526 #ifdef CONFIG_LINUX 1527 q_unix->has_tight = true; 1528 q_unix->tight = tight; 1529 q_unix->has_abstract = true; 1530 q_unix->abstract = abstract; 1531 #endif 1532 } else if (host) { 1533 addr->type = SOCKET_ADDRESS_LEGACY_KIND_INET; 1534 addr->u.inet.data = g_new(InetSocketAddress, 1); 1535 *addr->u.inet.data = (InetSocketAddress) { 1536 .host = g_strdup(host), 1537 .port = g_strdup(port), 1538 .has_to = qemu_opt_get(opts, "to"), 1539 .to = qemu_opt_get_number(opts, "to", 0), 1540 .has_ipv4 = qemu_opt_get(opts, "ipv4"), 1541 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), 1542 .has_ipv6 = qemu_opt_get(opts, "ipv6"), 1543 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), 1544 }; 1545 } else if (fd) { 1546 addr->type = SOCKET_ADDRESS_LEGACY_KIND_FD; 1547 addr->u.fd.data = g_new(String, 1); 1548 addr->u.fd.data->str = g_strdup(fd); 1549 } else { 1550 g_assert_not_reached(); 1551 } 1552 sock->addr = addr; 1553 } 1554 1555 static void 1556 char_socket_get_addr(Object *obj, Visitor *v, const char *name, 1557 void *opaque, Error **errp) 1558 { 1559 SocketChardev *s = SOCKET_CHARDEV(obj); 1560 1561 visit_type_SocketAddress(v, name, &s->addr, errp); 1562 } 1563 1564 static bool 1565 char_socket_get_connected(Object *obj, Error **errp) 1566 { 1567 SocketChardev *s = SOCKET_CHARDEV(obj); 1568 1569 return s->state == TCP_CHARDEV_STATE_CONNECTED; 1570 } 1571 1572 static void char_socket_class_init(ObjectClass *oc, void *data) 1573 { 1574 ChardevClass *cc = CHARDEV_CLASS(oc); 1575 1576 cc->supports_yank = true; 1577 1578 cc->parse = qemu_chr_parse_socket; 1579 cc->open = qmp_chardev_open_socket; 1580 cc->chr_wait_connected = tcp_chr_wait_connected; 1581 cc->chr_write = tcp_chr_write; 1582 cc->chr_sync_read = tcp_chr_sync_read; 1583 cc->chr_disconnect = tcp_chr_disconnect; 1584 cc->get_msgfds = tcp_get_msgfds; 1585 cc->set_msgfds = tcp_set_msgfds; 1586 cc->chr_add_client = tcp_chr_add_client; 1587 cc->chr_add_watch = tcp_chr_add_watch; 1588 cc->chr_update_read_handler = tcp_chr_update_read_handler; 1589 1590 object_class_property_add(oc, "addr", "SocketAddress", 1591 char_socket_get_addr, NULL, 1592 NULL, NULL); 1593 1594 object_class_property_add_bool(oc, "connected", char_socket_get_connected, 1595 NULL); 1596 } 1597 1598 static const TypeInfo char_socket_type_info = { 1599 .name = TYPE_CHARDEV_SOCKET, 1600 .parent = TYPE_CHARDEV, 1601 .instance_size = sizeof(SocketChardev), 1602 .instance_finalize = char_socket_finalize, 1603 .class_init = char_socket_class_init, 1604 }; 1605 1606 static void register_types(void) 1607 { 1608 type_register_static(&char_socket_type_info); 1609 } 1610 1611 type_init(register_types); 1612