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