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