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