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