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