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 #include "qemu/osdep.h" 25 #include "sysemu/char.h" 26 #include "io/channel-socket.h" 27 #include "io/channel-tls.h" 28 #include "qemu/error-report.h" 29 #include "qapi/error.h" 30 #include "qapi/clone-visitor.h" 31 32 #include "char-io.h" 33 34 /***********************************************************/ 35 /* TCP Net console */ 36 37 #define TCP_MAX_FDS 16 38 39 typedef struct { 40 Chardev parent; 41 QIOChannel *ioc; /* Client I/O channel */ 42 QIOChannelSocket *sioc; /* Client master channel */ 43 QIOChannelSocket *listen_ioc; 44 guint listen_tag; 45 QCryptoTLSCreds *tls_creds; 46 int connected; 47 int max_size; 48 int do_telnetopt; 49 int do_nodelay; 50 int is_unix; 51 int *read_msgfds; 52 size_t read_msgfds_num; 53 int *write_msgfds; 54 size_t write_msgfds_num; 55 56 SocketAddress *addr; 57 bool is_listen; 58 bool is_telnet; 59 60 guint reconnect_timer; 61 int64_t reconnect_time; 62 bool connect_err_reported; 63 } SocketChardev; 64 65 #define SOCKET_CHARDEV(obj) \ 66 OBJECT_CHECK(SocketChardev, (obj), TYPE_CHARDEV_SOCKET) 67 68 static gboolean socket_reconnect_timeout(gpointer opaque); 69 70 static void qemu_chr_socket_restart_timer(Chardev *chr) 71 { 72 SocketChardev *s = SOCKET_CHARDEV(chr); 73 char *name; 74 75 assert(s->connected == 0); 76 s->reconnect_timer = g_timeout_add_seconds(s->reconnect_time, 77 socket_reconnect_timeout, chr); 78 name = g_strdup_printf("chardev-socket-reconnect-%s", chr->label); 79 g_source_set_name_by_id(s->reconnect_timer, name); 80 g_free(name); 81 } 82 83 static void check_report_connect_error(Chardev *chr, 84 Error *err) 85 { 86 SocketChardev *s = SOCKET_CHARDEV(chr); 87 88 if (!s->connect_err_reported) { 89 error_report("Unable to connect character device %s: %s", 90 chr->label, error_get_pretty(err)); 91 s->connect_err_reported = true; 92 } 93 qemu_chr_socket_restart_timer(chr); 94 } 95 96 static gboolean tcp_chr_accept(QIOChannel *chan, 97 GIOCondition cond, 98 void *opaque); 99 100 /* Called with chr_write_lock held. */ 101 static int tcp_chr_write(Chardev *chr, const uint8_t *buf, int len) 102 { 103 SocketChardev *s = SOCKET_CHARDEV(chr); 104 105 if (s->connected) { 106 int ret = io_channel_send_full(s->ioc, buf, len, 107 s->write_msgfds, 108 s->write_msgfds_num); 109 110 /* free the written msgfds, no matter what */ 111 if (s->write_msgfds_num) { 112 g_free(s->write_msgfds); 113 s->write_msgfds = 0; 114 s->write_msgfds_num = 0; 115 } 116 117 return ret; 118 } else { 119 /* XXX: indicate an error ? */ 120 return len; 121 } 122 } 123 124 static int tcp_chr_read_poll(void *opaque) 125 { 126 Chardev *chr = CHARDEV(opaque); 127 SocketChardev *s = SOCKET_CHARDEV(opaque); 128 if (!s->connected) { 129 return 0; 130 } 131 s->max_size = qemu_chr_be_can_write(chr); 132 return s->max_size; 133 } 134 135 #define IAC 255 136 #define IAC_BREAK 243 137 static void tcp_chr_process_IAC_bytes(Chardev *chr, 138 SocketChardev *s, 139 uint8_t *buf, int *size) 140 { 141 /* Handle any telnet client's basic IAC options to satisfy char by 142 * char mode with no echo. All IAC options will be removed from 143 * the buf and the do_telnetopt variable will be used to track the 144 * state of the width of the IAC information. 145 * 146 * IAC commands come in sets of 3 bytes with the exception of the 147 * "IAC BREAK" command and the double IAC. 148 */ 149 150 int i; 151 int j = 0; 152 153 for (i = 0; i < *size; i++) { 154 if (s->do_telnetopt > 1) { 155 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) { 156 /* Double IAC means send an IAC */ 157 if (j != i) { 158 buf[j] = buf[i]; 159 } 160 j++; 161 s->do_telnetopt = 1; 162 } else { 163 if ((unsigned char)buf[i] == IAC_BREAK 164 && s->do_telnetopt == 2) { 165 /* Handle IAC break commands by sending a serial break */ 166 qemu_chr_be_event(chr, CHR_EVENT_BREAK); 167 s->do_telnetopt++; 168 } 169 s->do_telnetopt++; 170 } 171 if (s->do_telnetopt >= 4) { 172 s->do_telnetopt = 1; 173 } 174 } else { 175 if ((unsigned char)buf[i] == IAC) { 176 s->do_telnetopt = 2; 177 } else { 178 if (j != i) { 179 buf[j] = buf[i]; 180 } 181 j++; 182 } 183 } 184 } 185 *size = j; 186 } 187 188 static int tcp_get_msgfds(Chardev *chr, int *fds, int num) 189 { 190 SocketChardev *s = SOCKET_CHARDEV(chr); 191 192 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num; 193 194 assert(num <= TCP_MAX_FDS); 195 196 if (to_copy) { 197 int i; 198 199 memcpy(fds, s->read_msgfds, to_copy * sizeof(int)); 200 201 /* Close unused fds */ 202 for (i = to_copy; i < s->read_msgfds_num; i++) { 203 close(s->read_msgfds[i]); 204 } 205 206 g_free(s->read_msgfds); 207 s->read_msgfds = 0; 208 s->read_msgfds_num = 0; 209 } 210 211 return to_copy; 212 } 213 214 static int tcp_set_msgfds(Chardev *chr, int *fds, int num) 215 { 216 SocketChardev *s = SOCKET_CHARDEV(chr); 217 218 /* clear old pending fd array */ 219 g_free(s->write_msgfds); 220 s->write_msgfds = NULL; 221 s->write_msgfds_num = 0; 222 223 if (!s->connected || 224 !qio_channel_has_feature(s->ioc, 225 QIO_CHANNEL_FEATURE_FD_PASS)) { 226 return -1; 227 } 228 229 if (num) { 230 s->write_msgfds = g_new(int, num); 231 memcpy(s->write_msgfds, fds, num * sizeof(int)); 232 } 233 234 s->write_msgfds_num = num; 235 236 return 0; 237 } 238 239 static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len) 240 { 241 SocketChardev *s = SOCKET_CHARDEV(chr); 242 struct iovec iov = { .iov_base = buf, .iov_len = len }; 243 int ret; 244 size_t i; 245 int *msgfds = NULL; 246 size_t msgfds_num = 0; 247 248 if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) { 249 ret = qio_channel_readv_full(s->ioc, &iov, 1, 250 &msgfds, &msgfds_num, 251 NULL); 252 } else { 253 ret = qio_channel_readv_full(s->ioc, &iov, 1, 254 NULL, NULL, 255 NULL); 256 } 257 258 if (ret == QIO_CHANNEL_ERR_BLOCK) { 259 errno = EAGAIN; 260 ret = -1; 261 } else if (ret == -1) { 262 errno = EIO; 263 } 264 265 if (msgfds_num) { 266 /* close and clean read_msgfds */ 267 for (i = 0; i < s->read_msgfds_num; i++) { 268 close(s->read_msgfds[i]); 269 } 270 271 if (s->read_msgfds_num) { 272 g_free(s->read_msgfds); 273 } 274 275 s->read_msgfds = msgfds; 276 s->read_msgfds_num = msgfds_num; 277 } 278 279 for (i = 0; i < s->read_msgfds_num; i++) { 280 int fd = s->read_msgfds[i]; 281 if (fd < 0) { 282 continue; 283 } 284 285 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */ 286 qemu_set_block(fd); 287 288 #ifndef MSG_CMSG_CLOEXEC 289 qemu_set_cloexec(fd); 290 #endif 291 } 292 293 return ret; 294 } 295 296 static GSource *tcp_chr_add_watch(Chardev *chr, GIOCondition cond) 297 { 298 SocketChardev *s = SOCKET_CHARDEV(chr); 299 return qio_channel_create_watch(s->ioc, cond); 300 } 301 302 static void tcp_chr_free_connection(Chardev *chr) 303 { 304 SocketChardev *s = SOCKET_CHARDEV(chr); 305 int i; 306 307 if (!s->connected) { 308 return; 309 } 310 311 if (s->read_msgfds_num) { 312 for (i = 0; i < s->read_msgfds_num; i++) { 313 close(s->read_msgfds[i]); 314 } 315 g_free(s->read_msgfds); 316 s->read_msgfds = NULL; 317 s->read_msgfds_num = 0; 318 } 319 320 tcp_set_msgfds(chr, NULL, 0); 321 remove_fd_in_watch(chr); 322 object_unref(OBJECT(s->sioc)); 323 s->sioc = NULL; 324 object_unref(OBJECT(s->ioc)); 325 s->ioc = NULL; 326 g_free(chr->filename); 327 chr->filename = NULL; 328 s->connected = 0; 329 } 330 331 static char *SocketAddress_to_str(const char *prefix, SocketAddress *addr, 332 bool is_listen, bool is_telnet) 333 { 334 switch (addr->type) { 335 case SOCKET_ADDRESS_KIND_INET: 336 return g_strdup_printf("%s%s:%s:%s%s", prefix, 337 is_telnet ? "telnet" : "tcp", 338 addr->u.inet.data->host, 339 addr->u.inet.data->port, 340 is_listen ? ",server" : ""); 341 break; 342 case SOCKET_ADDRESS_KIND_UNIX: 343 return g_strdup_printf("%sunix:%s%s", prefix, 344 addr->u.q_unix.data->path, 345 is_listen ? ",server" : ""); 346 break; 347 case SOCKET_ADDRESS_KIND_FD: 348 return g_strdup_printf("%sfd:%s%s", prefix, addr->u.fd.data->str, 349 is_listen ? ",server" : ""); 350 break; 351 default: 352 abort(); 353 } 354 } 355 356 static void tcp_chr_disconnect(Chardev *chr) 357 { 358 SocketChardev *s = SOCKET_CHARDEV(chr); 359 360 if (!s->connected) { 361 return; 362 } 363 364 tcp_chr_free_connection(chr); 365 366 if (s->listen_ioc) { 367 s->listen_tag = qio_channel_add_watch( 368 QIO_CHANNEL(s->listen_ioc), G_IO_IN, tcp_chr_accept, chr, NULL); 369 } 370 chr->filename = SocketAddress_to_str("disconnected:", s->addr, 371 s->is_listen, s->is_telnet); 372 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 373 if (s->reconnect_time) { 374 qemu_chr_socket_restart_timer(chr); 375 } 376 } 377 378 static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) 379 { 380 Chardev *chr = CHARDEV(opaque); 381 SocketChardev *s = SOCKET_CHARDEV(opaque); 382 uint8_t buf[CHR_READ_BUF_LEN]; 383 int len, size; 384 385 if (!s->connected || s->max_size <= 0) { 386 return TRUE; 387 } 388 len = sizeof(buf); 389 if (len > s->max_size) { 390 len = s->max_size; 391 } 392 size = tcp_chr_recv(chr, (void *)buf, len); 393 if (size == 0 || size == -1) { 394 /* connection closed */ 395 tcp_chr_disconnect(chr); 396 } else if (size > 0) { 397 if (s->do_telnetopt) { 398 tcp_chr_process_IAC_bytes(chr, s, buf, &size); 399 } 400 if (size > 0) { 401 qemu_chr_be_write(chr, buf, size); 402 } 403 } 404 405 return TRUE; 406 } 407 408 static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len) 409 { 410 SocketChardev *s = SOCKET_CHARDEV(chr); 411 int size; 412 413 if (!s->connected) { 414 return 0; 415 } 416 417 size = tcp_chr_recv(chr, (void *) buf, len); 418 if (size == 0) { 419 /* connection closed */ 420 tcp_chr_disconnect(chr); 421 } 422 423 return size; 424 } 425 426 static char *sockaddr_to_str(struct sockaddr_storage *ss, socklen_t ss_len, 427 struct sockaddr_storage *ps, socklen_t ps_len, 428 bool is_listen, bool is_telnet) 429 { 430 char shost[NI_MAXHOST], sserv[NI_MAXSERV]; 431 char phost[NI_MAXHOST], pserv[NI_MAXSERV]; 432 const char *left = "", *right = ""; 433 434 switch (ss->ss_family) { 435 #ifndef _WIN32 436 case AF_UNIX: 437 return g_strdup_printf("unix:%s%s", 438 ((struct sockaddr_un *)(ss))->sun_path, 439 is_listen ? ",server" : ""); 440 #endif 441 case AF_INET6: 442 left = "["; 443 right = "]"; 444 /* fall through */ 445 case AF_INET: 446 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost), 447 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV); 448 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost), 449 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV); 450 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s", 451 is_telnet ? "telnet" : "tcp", 452 left, shost, right, sserv, 453 is_listen ? ",server" : "", 454 left, phost, right, pserv); 455 456 default: 457 return g_strdup_printf("unknown"); 458 } 459 } 460 461 static void tcp_chr_connect(void *opaque) 462 { 463 Chardev *chr = CHARDEV(opaque); 464 SocketChardev *s = SOCKET_CHARDEV(opaque); 465 466 g_free(chr->filename); 467 chr->filename = sockaddr_to_str( 468 &s->sioc->localAddr, s->sioc->localAddrLen, 469 &s->sioc->remoteAddr, s->sioc->remoteAddrLen, 470 s->is_listen, s->is_telnet); 471 472 s->connected = 1; 473 if (s->ioc) { 474 chr->fd_in_tag = io_add_watch_poll(chr, s->ioc, 475 tcp_chr_read_poll, 476 tcp_chr_read, 477 chr, NULL); 478 } 479 qemu_chr_be_generic_open(chr); 480 } 481 482 static void tcp_chr_update_read_handler(Chardev *chr, 483 GMainContext *context) 484 { 485 SocketChardev *s = SOCKET_CHARDEV(chr); 486 487 if (!s->connected) { 488 return; 489 } 490 491 remove_fd_in_watch(chr); 492 if (s->ioc) { 493 chr->fd_in_tag = io_add_watch_poll(chr, s->ioc, 494 tcp_chr_read_poll, 495 tcp_chr_read, chr, 496 context); 497 } 498 } 499 500 typedef struct { 501 Chardev *chr; 502 char buf[12]; 503 size_t buflen; 504 } TCPChardevTelnetInit; 505 506 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, 507 GIOCondition cond G_GNUC_UNUSED, 508 gpointer user_data) 509 { 510 TCPChardevTelnetInit *init = user_data; 511 ssize_t ret; 512 513 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL); 514 if (ret < 0) { 515 if (ret == QIO_CHANNEL_ERR_BLOCK) { 516 ret = 0; 517 } else { 518 tcp_chr_disconnect(init->chr); 519 return FALSE; 520 } 521 } 522 init->buflen -= ret; 523 524 if (init->buflen == 0) { 525 tcp_chr_connect(init->chr); 526 return FALSE; 527 } 528 529 memmove(init->buf, init->buf + ret, init->buflen); 530 531 return TRUE; 532 } 533 534 static void tcp_chr_telnet_init(Chardev *chr) 535 { 536 SocketChardev *s = SOCKET_CHARDEV(chr); 537 TCPChardevTelnetInit *init = g_new0(TCPChardevTelnetInit, 1); 538 size_t n = 0; 539 540 init->chr = chr; 541 init->buflen = 12; 542 543 #define IACSET(x, a, b, c) \ 544 do { \ 545 x[n++] = a; \ 546 x[n++] = b; \ 547 x[n++] = c; \ 548 } while (0) 549 550 /* Prep the telnet negotion to put telnet in binary, 551 * no echo, single char mode */ 552 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ 553 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ 554 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ 555 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ 556 557 #undef IACSET 558 559 qio_channel_add_watch( 560 s->ioc, G_IO_OUT, 561 tcp_chr_telnet_init_io, 562 init, NULL); 563 } 564 565 566 static void tcp_chr_tls_handshake(QIOTask *task, 567 gpointer user_data) 568 { 569 Chardev *chr = user_data; 570 SocketChardev *s = user_data; 571 572 if (qio_task_propagate_error(task, NULL)) { 573 tcp_chr_disconnect(chr); 574 } else { 575 if (s->do_telnetopt) { 576 tcp_chr_telnet_init(chr); 577 } else { 578 tcp_chr_connect(chr); 579 } 580 } 581 } 582 583 584 static void tcp_chr_tls_init(Chardev *chr) 585 { 586 SocketChardev *s = SOCKET_CHARDEV(chr); 587 QIOChannelTLS *tioc; 588 Error *err = NULL; 589 gchar *name; 590 591 if (s->is_listen) { 592 tioc = qio_channel_tls_new_server( 593 s->ioc, s->tls_creds, 594 NULL, /* XXX Use an ACL */ 595 &err); 596 } else { 597 tioc = qio_channel_tls_new_client( 598 s->ioc, s->tls_creds, 599 s->addr->u.inet.data->host, 600 &err); 601 } 602 if (tioc == NULL) { 603 error_free(err); 604 tcp_chr_disconnect(chr); 605 return; 606 } 607 name = g_strdup_printf("chardev-tls-%s-%s", 608 s->is_listen ? "server" : "client", 609 chr->label); 610 qio_channel_set_name(QIO_CHANNEL(tioc), name); 611 g_free(name); 612 object_unref(OBJECT(s->ioc)); 613 s->ioc = QIO_CHANNEL(tioc); 614 615 qio_channel_tls_handshake(tioc, 616 tcp_chr_tls_handshake, 617 chr, 618 NULL); 619 } 620 621 622 static void tcp_chr_set_client_ioc_name(Chardev *chr, 623 QIOChannelSocket *sioc) 624 { 625 SocketChardev *s = SOCKET_CHARDEV(chr); 626 char *name; 627 name = g_strdup_printf("chardev-tcp-%s-%s", 628 s->is_listen ? "server" : "client", 629 chr->label); 630 qio_channel_set_name(QIO_CHANNEL(sioc), name); 631 g_free(name); 632 633 } 634 635 static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc) 636 { 637 SocketChardev *s = SOCKET_CHARDEV(chr); 638 639 if (s->ioc != NULL) { 640 return -1; 641 } 642 643 s->ioc = QIO_CHANNEL(sioc); 644 object_ref(OBJECT(sioc)); 645 s->sioc = sioc; 646 object_ref(OBJECT(sioc)); 647 648 qio_channel_set_blocking(s->ioc, false, NULL); 649 650 if (s->do_nodelay) { 651 qio_channel_set_delay(s->ioc, false); 652 } 653 if (s->listen_tag) { 654 g_source_remove(s->listen_tag); 655 s->listen_tag = 0; 656 } 657 658 if (s->tls_creds) { 659 tcp_chr_tls_init(chr); 660 } else { 661 if (s->do_telnetopt) { 662 tcp_chr_telnet_init(chr); 663 } else { 664 tcp_chr_connect(chr); 665 } 666 } 667 668 return 0; 669 } 670 671 672 static int tcp_chr_add_client(Chardev *chr, int fd) 673 { 674 int ret; 675 QIOChannelSocket *sioc; 676 677 sioc = qio_channel_socket_new_fd(fd, NULL); 678 if (!sioc) { 679 return -1; 680 } 681 tcp_chr_set_client_ioc_name(chr, sioc); 682 ret = tcp_chr_new_client(chr, sioc); 683 object_unref(OBJECT(sioc)); 684 return ret; 685 } 686 687 static gboolean tcp_chr_accept(QIOChannel *channel, 688 GIOCondition cond, 689 void *opaque) 690 { 691 Chardev *chr = CHARDEV(opaque); 692 QIOChannelSocket *sioc; 693 694 sioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(channel), 695 NULL); 696 if (!sioc) { 697 return TRUE; 698 } 699 700 tcp_chr_new_client(chr, sioc); 701 702 object_unref(OBJECT(sioc)); 703 704 return TRUE; 705 } 706 707 static int tcp_chr_wait_connected(Chardev *chr, Error **errp) 708 { 709 SocketChardev *s = SOCKET_CHARDEV(chr); 710 QIOChannelSocket *sioc; 711 712 /* It can't wait on s->connected, since it is set asynchronously 713 * in TLS and telnet cases, only wait for an accepted socket */ 714 while (!s->ioc) { 715 if (s->is_listen) { 716 error_report("QEMU waiting for connection on: %s", 717 chr->filename); 718 qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), true, NULL); 719 tcp_chr_accept(QIO_CHANNEL(s->listen_ioc), G_IO_IN, chr); 720 qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), false, NULL); 721 } else { 722 sioc = qio_channel_socket_new(); 723 tcp_chr_set_client_ioc_name(chr, sioc); 724 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) { 725 object_unref(OBJECT(sioc)); 726 return -1; 727 } 728 tcp_chr_new_client(chr, sioc); 729 object_unref(OBJECT(sioc)); 730 } 731 } 732 733 return 0; 734 } 735 736 static void char_socket_finalize(Object *obj) 737 { 738 Chardev *chr = CHARDEV(obj); 739 SocketChardev *s = SOCKET_CHARDEV(obj); 740 741 tcp_chr_free_connection(chr); 742 743 if (s->reconnect_timer) { 744 g_source_remove(s->reconnect_timer); 745 s->reconnect_timer = 0; 746 } 747 qapi_free_SocketAddress(s->addr); 748 if (s->listen_tag) { 749 g_source_remove(s->listen_tag); 750 s->listen_tag = 0; 751 } 752 if (s->listen_ioc) { 753 object_unref(OBJECT(s->listen_ioc)); 754 } 755 if (s->tls_creds) { 756 object_unref(OBJECT(s->tls_creds)); 757 } 758 759 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 760 } 761 762 static void qemu_chr_socket_connected(QIOTask *task, void *opaque) 763 { 764 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 765 Chardev *chr = CHARDEV(opaque); 766 SocketChardev *s = SOCKET_CHARDEV(chr); 767 Error *err = NULL; 768 769 if (qio_task_propagate_error(task, &err)) { 770 check_report_connect_error(chr, err); 771 error_free(err); 772 goto cleanup; 773 } 774 775 s->connect_err_reported = false; 776 tcp_chr_new_client(chr, sioc); 777 778 cleanup: 779 object_unref(OBJECT(sioc)); 780 } 781 782 static gboolean socket_reconnect_timeout(gpointer opaque) 783 { 784 Chardev *chr = CHARDEV(opaque); 785 SocketChardev *s = SOCKET_CHARDEV(opaque); 786 QIOChannelSocket *sioc; 787 788 s->reconnect_timer = 0; 789 790 if (chr->be_open) { 791 return false; 792 } 793 794 sioc = qio_channel_socket_new(); 795 tcp_chr_set_client_ioc_name(chr, sioc); 796 qio_channel_socket_connect_async(sioc, s->addr, 797 qemu_chr_socket_connected, 798 chr, NULL); 799 800 return false; 801 } 802 803 static void qmp_chardev_open_socket(Chardev *chr, 804 ChardevBackend *backend, 805 bool *be_opened, 806 Error **errp) 807 { 808 SocketChardev *s = SOCKET_CHARDEV(chr); 809 ChardevSocket *sock = backend->u.socket.data; 810 SocketAddress *addr = sock->addr; 811 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false; 812 bool is_listen = sock->has_server ? sock->server : true; 813 bool is_telnet = sock->has_telnet ? sock->telnet : false; 814 bool is_waitconnect = sock->has_wait ? sock->wait : false; 815 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; 816 QIOChannelSocket *sioc = NULL; 817 818 s->is_unix = addr->type == SOCKET_ADDRESS_KIND_UNIX; 819 s->is_listen = is_listen; 820 s->is_telnet = is_telnet; 821 s->do_nodelay = do_nodelay; 822 if (sock->tls_creds) { 823 Object *creds; 824 creds = object_resolve_path_component( 825 object_get_objects_root(), sock->tls_creds); 826 if (!creds) { 827 error_setg(errp, "No TLS credentials with id '%s'", 828 sock->tls_creds); 829 goto error; 830 } 831 s->tls_creds = (QCryptoTLSCreds *) 832 object_dynamic_cast(creds, 833 TYPE_QCRYPTO_TLS_CREDS); 834 if (!s->tls_creds) { 835 error_setg(errp, "Object with id '%s' is not TLS credentials", 836 sock->tls_creds); 837 goto error; 838 } 839 object_ref(OBJECT(s->tls_creds)); 840 if (is_listen) { 841 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 842 error_setg(errp, "%s", 843 "Expected TLS credentials for server endpoint"); 844 goto error; 845 } 846 } else { 847 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { 848 error_setg(errp, "%s", 849 "Expected TLS credentials for client endpoint"); 850 goto error; 851 } 852 } 853 } 854 855 s->addr = QAPI_CLONE(SocketAddress, sock->addr); 856 857 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); 858 if (s->is_unix) { 859 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); 860 } 861 862 /* be isn't opened until we get a connection */ 863 *be_opened = false; 864 865 chr->filename = SocketAddress_to_str("disconnected:", 866 addr, is_listen, is_telnet); 867 868 if (is_listen) { 869 if (is_telnet) { 870 s->do_telnetopt = 1; 871 } 872 } else if (reconnect > 0) { 873 s->reconnect_time = reconnect; 874 } 875 876 if (s->reconnect_time) { 877 sioc = qio_channel_socket_new(); 878 tcp_chr_set_client_ioc_name(chr, sioc); 879 qio_channel_socket_connect_async(sioc, s->addr, 880 qemu_chr_socket_connected, 881 chr, NULL); 882 } else { 883 if (s->is_listen) { 884 char *name; 885 sioc = qio_channel_socket_new(); 886 887 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label); 888 qio_channel_set_name(QIO_CHANNEL(sioc), name); 889 g_free(name); 890 891 if (qio_channel_socket_listen_sync(sioc, s->addr, errp) < 0) { 892 goto error; 893 } 894 s->listen_ioc = sioc; 895 if (is_waitconnect && 896 qemu_chr_wait_connected(chr, errp) < 0) { 897 return; 898 } 899 if (!s->ioc) { 900 s->listen_tag = qio_channel_add_watch( 901 QIO_CHANNEL(s->listen_ioc), G_IO_IN, 902 tcp_chr_accept, chr, NULL); 903 } 904 } else if (qemu_chr_wait_connected(chr, errp) < 0) { 905 goto error; 906 } 907 } 908 909 return; 910 911 error: 912 if (sioc) { 913 object_unref(OBJECT(sioc)); 914 } 915 } 916 917 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend, 918 Error **errp) 919 { 920 bool is_listen = qemu_opt_get_bool(opts, "server", false); 921 bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true); 922 bool is_telnet = qemu_opt_get_bool(opts, "telnet", false); 923 bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true); 924 int64_t reconnect = qemu_opt_get_number(opts, "reconnect", 0); 925 const char *path = qemu_opt_get(opts, "path"); 926 const char *host = qemu_opt_get(opts, "host"); 927 const char *port = qemu_opt_get(opts, "port"); 928 const char *tls_creds = qemu_opt_get(opts, "tls-creds"); 929 SocketAddress *addr; 930 ChardevSocket *sock; 931 932 backend->type = CHARDEV_BACKEND_KIND_SOCKET; 933 if (!path) { 934 if (!host) { 935 error_setg(errp, "chardev: socket: no host given"); 936 return; 937 } 938 if (!port) { 939 error_setg(errp, "chardev: socket: no port given"); 940 return; 941 } 942 } else { 943 if (tls_creds) { 944 error_setg(errp, "TLS can only be used over TCP socket"); 945 return; 946 } 947 } 948 949 sock = backend->u.socket.data = g_new0(ChardevSocket, 1); 950 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock)); 951 952 sock->has_nodelay = true; 953 sock->nodelay = do_nodelay; 954 sock->has_server = true; 955 sock->server = is_listen; 956 sock->has_telnet = true; 957 sock->telnet = is_telnet; 958 sock->has_wait = true; 959 sock->wait = is_waitconnect; 960 sock->has_reconnect = true; 961 sock->reconnect = reconnect; 962 sock->tls_creds = g_strdup(tls_creds); 963 964 addr = g_new0(SocketAddress, 1); 965 if (path) { 966 UnixSocketAddress *q_unix; 967 addr->type = SOCKET_ADDRESS_KIND_UNIX; 968 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 969 q_unix->path = g_strdup(path); 970 } else { 971 addr->type = SOCKET_ADDRESS_KIND_INET; 972 addr->u.inet.data = g_new(InetSocketAddress, 1); 973 *addr->u.inet.data = (InetSocketAddress) { 974 .host = g_strdup(host), 975 .port = g_strdup(port), 976 .has_to = qemu_opt_get(opts, "to"), 977 .to = qemu_opt_get_number(opts, "to", 0), 978 .has_ipv4 = qemu_opt_get(opts, "ipv4"), 979 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), 980 .has_ipv6 = qemu_opt_get(opts, "ipv6"), 981 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), 982 }; 983 } 984 sock->addr = addr; 985 } 986 987 static void char_socket_class_init(ObjectClass *oc, void *data) 988 { 989 ChardevClass *cc = CHARDEV_CLASS(oc); 990 991 cc->parse = qemu_chr_parse_socket; 992 cc->open = qmp_chardev_open_socket; 993 cc->chr_wait_connected = tcp_chr_wait_connected; 994 cc->chr_write = tcp_chr_write; 995 cc->chr_sync_read = tcp_chr_sync_read; 996 cc->chr_disconnect = tcp_chr_disconnect; 997 cc->get_msgfds = tcp_get_msgfds; 998 cc->set_msgfds = tcp_set_msgfds; 999 cc->chr_add_client = tcp_chr_add_client; 1000 cc->chr_add_watch = tcp_chr_add_watch; 1001 cc->chr_update_read_handler = tcp_chr_update_read_handler; 1002 } 1003 1004 static const TypeInfo char_socket_type_info = { 1005 .name = TYPE_CHARDEV_SOCKET, 1006 .parent = TYPE_CHARDEV, 1007 .instance_size = sizeof(SocketChardev), 1008 .instance_finalize = char_socket_finalize, 1009 .class_init = char_socket_class_init, 1010 }; 1011 1012 static void register_types(void) 1013 { 1014 type_register_static(&char_socket_type_info); 1015 } 1016 1017 type_init(register_types); 1018