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 #include "qom/object.h" 40 41 /***********************************************************/ 42 /* TCP Net console */ 43 44 #define TCP_MAX_FDS 16 45 46 typedef struct { 47 char buf[21]; 48 size_t buflen; 49 } TCPChardevTelnetInit; 50 51 typedef enum { 52 TCP_CHARDEV_STATE_DISCONNECTED, 53 TCP_CHARDEV_STATE_CONNECTING, 54 TCP_CHARDEV_STATE_CONNECTED, 55 } TCPChardevState; 56 57 struct SocketChardev { 58 Chardev parent; 59 QIOChannel *ioc; /* Client I/O channel */ 60 QIOChannelSocket *sioc; /* Client master channel */ 61 QIONetListener *listener; 62 GSource *hup_source; 63 QCryptoTLSCreds *tls_creds; 64 char *tls_authz; 65 TCPChardevState state; 66 int max_size; 67 int do_telnetopt; 68 int do_nodelay; 69 int *read_msgfds; 70 size_t read_msgfds_num; 71 int *write_msgfds; 72 size_t write_msgfds_num; 73 74 SocketAddress *addr; 75 bool is_listen; 76 bool is_telnet; 77 bool is_tn3270; 78 GSource *telnet_source; 79 TCPChardevTelnetInit *telnet_init; 80 81 bool is_websock; 82 83 GSource *reconnect_timer; 84 int64_t reconnect_time; 85 bool connect_err_reported; 86 87 QIOTask *connect_task; 88 }; 89 typedef struct SocketChardev SocketChardev; 90 91 DECLARE_INSTANCE_CHECKER(SocketChardev, SOCKET_CHARDEV, 92 TYPE_CHARDEV_SOCKET) 93 94 static gboolean socket_reconnect_timeout(gpointer opaque); 95 static void tcp_chr_telnet_init(Chardev *chr); 96 97 static void tcp_chr_change_state(SocketChardev *s, TCPChardevState state) 98 { 99 switch (state) { 100 case TCP_CHARDEV_STATE_DISCONNECTED: 101 break; 102 case TCP_CHARDEV_STATE_CONNECTING: 103 assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED); 104 break; 105 case TCP_CHARDEV_STATE_CONNECTED: 106 assert(s->state == TCP_CHARDEV_STATE_CONNECTING); 107 break; 108 } 109 s->state = state; 110 } 111 112 static void tcp_chr_reconn_timer_cancel(SocketChardev *s) 113 { 114 if (s->reconnect_timer) { 115 g_source_destroy(s->reconnect_timer); 116 g_source_unref(s->reconnect_timer); 117 s->reconnect_timer = NULL; 118 } 119 } 120 121 static void qemu_chr_socket_restart_timer(Chardev *chr) 122 { 123 SocketChardev *s = SOCKET_CHARDEV(chr); 124 char *name; 125 126 assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED); 127 assert(!s->reconnect_timer); 128 name = g_strdup_printf("chardev-socket-reconnect-%s", chr->label); 129 s->reconnect_timer = qemu_chr_timeout_add_ms(chr, 130 s->reconnect_time * 1000, 131 socket_reconnect_timeout, 132 chr); 133 g_source_set_name(s->reconnect_timer, name); 134 g_free(name); 135 } 136 137 static void check_report_connect_error(Chardev *chr, 138 Error *err) 139 { 140 SocketChardev *s = SOCKET_CHARDEV(chr); 141 142 if (!s->connect_err_reported) { 143 error_reportf_err(err, 144 "Unable to connect character device %s: ", 145 chr->label); 146 s->connect_err_reported = true; 147 } else { 148 error_free(err); 149 } 150 qemu_chr_socket_restart_timer(chr); 151 } 152 153 static void tcp_chr_accept(QIONetListener *listener, 154 QIOChannelSocket *cioc, 155 void *opaque); 156 157 static int tcp_chr_read_poll(void *opaque); 158 static void tcp_chr_disconnect_locked(Chardev *chr); 159 160 /* Called with chr_write_lock held. */ 161 static int tcp_chr_write(Chardev *chr, const uint8_t *buf, int len) 162 { 163 SocketChardev *s = SOCKET_CHARDEV(chr); 164 165 if (s->state == TCP_CHARDEV_STATE_CONNECTED) { 166 int ret = io_channel_send_full(s->ioc, buf, len, 167 s->write_msgfds, 168 s->write_msgfds_num); 169 170 /* free the written msgfds in any cases 171 * other than ret < 0 && errno == EAGAIN 172 */ 173 if (!(ret < 0 && EAGAIN == errno) 174 && s->write_msgfds_num) { 175 g_free(s->write_msgfds); 176 s->write_msgfds = 0; 177 s->write_msgfds_num = 0; 178 } 179 180 if (ret < 0 && errno != EAGAIN) { 181 if (tcp_chr_read_poll(chr) <= 0) { 182 /* Perform disconnect and return error. */ 183 tcp_chr_disconnect_locked(chr); 184 } /* else let the read handler finish it properly */ 185 } 186 187 return ret; 188 } else { 189 /* Indicate an error. */ 190 errno = EIO; 191 return -1; 192 } 193 } 194 195 static int tcp_chr_read_poll(void *opaque) 196 { 197 Chardev *chr = CHARDEV(opaque); 198 SocketChardev *s = SOCKET_CHARDEV(opaque); 199 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 200 return 0; 201 } 202 s->max_size = qemu_chr_be_can_write(chr); 203 return s->max_size; 204 } 205 206 static void tcp_chr_process_IAC_bytes(Chardev *chr, 207 SocketChardev *s, 208 uint8_t *buf, int *size) 209 { 210 /* Handle any telnet or tn3270 client's basic IAC options. 211 * For telnet options, it satisfies char by char mode with no echo. 212 * For tn3270 options, it satisfies binary mode with EOR. 213 * All IAC options will be removed from the buf and the do_opt 214 * pointer will be used to track the state of the width of the 215 * IAC information. 216 * 217 * RFC854: "All TELNET commands consist of at least a two byte sequence. 218 * The commands dealing with option negotiation are three byte sequences, 219 * the third byte being the code for the option referenced." 220 * "IAC BREAK", "IAC IP", "IAC NOP" and the double IAC are two bytes. 221 * "IAC SB", "IAC SE" and "IAC EOR" are saved to split up data boundary 222 * for tn3270. 223 * NOP, Break and Interrupt Process(IP) might be encountered during a TN3270 224 * session, and NOP and IP need to be done later. 225 */ 226 227 int i; 228 int j = 0; 229 230 for (i = 0; i < *size; i++) { 231 if (s->do_telnetopt > 1) { 232 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) { 233 /* Double IAC means send an IAC */ 234 if (j != i) { 235 buf[j] = buf[i]; 236 } 237 j++; 238 s->do_telnetopt = 1; 239 } else { 240 if ((unsigned char)buf[i] == IAC_BREAK 241 && s->do_telnetopt == 2) { 242 /* Handle IAC break commands by sending a serial break */ 243 qemu_chr_be_event(chr, CHR_EVENT_BREAK); 244 s->do_telnetopt++; 245 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_EOR 246 || (unsigned char)buf[i] == IAC_SB 247 || (unsigned char)buf[i] == IAC_SE) 248 && s->do_telnetopt == 2) { 249 buf[j++] = IAC; 250 buf[j++] = buf[i]; 251 s->do_telnetopt++; 252 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_IP 253 || (unsigned char)buf[i] == IAC_NOP) 254 && s->do_telnetopt == 2) { 255 /* TODO: IP and NOP need to be implemented later. */ 256 s->do_telnetopt++; 257 } 258 s->do_telnetopt++; 259 } 260 if (s->do_telnetopt >= 4) { 261 s->do_telnetopt = 1; 262 } 263 } else { 264 if ((unsigned char)buf[i] == IAC) { 265 s->do_telnetopt = 2; 266 } else { 267 if (j != i) { 268 buf[j] = buf[i]; 269 } 270 j++; 271 } 272 } 273 } 274 *size = j; 275 } 276 277 static int tcp_get_msgfds(Chardev *chr, int *fds, int num) 278 { 279 SocketChardev *s = SOCKET_CHARDEV(chr); 280 281 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num; 282 283 assert(num <= TCP_MAX_FDS); 284 285 if (to_copy) { 286 int i; 287 288 memcpy(fds, s->read_msgfds, to_copy * sizeof(int)); 289 290 /* Close unused fds */ 291 for (i = to_copy; i < s->read_msgfds_num; i++) { 292 close(s->read_msgfds[i]); 293 } 294 295 g_free(s->read_msgfds); 296 s->read_msgfds = 0; 297 s->read_msgfds_num = 0; 298 } 299 300 return to_copy; 301 } 302 303 static int tcp_set_msgfds(Chardev *chr, int *fds, int num) 304 { 305 SocketChardev *s = SOCKET_CHARDEV(chr); 306 307 /* clear old pending fd array */ 308 g_free(s->write_msgfds); 309 s->write_msgfds = NULL; 310 s->write_msgfds_num = 0; 311 312 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) || 313 !qio_channel_has_feature(s->ioc, 314 QIO_CHANNEL_FEATURE_FD_PASS)) { 315 return -1; 316 } 317 318 if (num) { 319 s->write_msgfds = g_new(int, num); 320 memcpy(s->write_msgfds, fds, num * sizeof(int)); 321 } 322 323 s->write_msgfds_num = num; 324 325 return 0; 326 } 327 328 static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len) 329 { 330 SocketChardev *s = SOCKET_CHARDEV(chr); 331 struct iovec iov = { .iov_base = buf, .iov_len = len }; 332 int ret; 333 size_t i; 334 int *msgfds = NULL; 335 size_t msgfds_num = 0; 336 337 if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) { 338 ret = qio_channel_readv_full(s->ioc, &iov, 1, 339 &msgfds, &msgfds_num, 340 NULL); 341 } else { 342 ret = qio_channel_readv_full(s->ioc, &iov, 1, 343 NULL, NULL, 344 NULL); 345 } 346 347 if (ret == QIO_CHANNEL_ERR_BLOCK) { 348 errno = EAGAIN; 349 ret = -1; 350 } else if (ret == -1) { 351 errno = EIO; 352 } 353 354 if (msgfds_num) { 355 /* close and clean read_msgfds */ 356 for (i = 0; i < s->read_msgfds_num; i++) { 357 close(s->read_msgfds[i]); 358 } 359 360 if (s->read_msgfds_num) { 361 g_free(s->read_msgfds); 362 } 363 364 s->read_msgfds = msgfds; 365 s->read_msgfds_num = msgfds_num; 366 } 367 368 for (i = 0; i < s->read_msgfds_num; i++) { 369 int fd = s->read_msgfds[i]; 370 if (fd < 0) { 371 continue; 372 } 373 374 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */ 375 qemu_set_block(fd); 376 377 #ifndef MSG_CMSG_CLOEXEC 378 qemu_set_cloexec(fd); 379 #endif 380 } 381 382 return ret; 383 } 384 385 static GSource *tcp_chr_add_watch(Chardev *chr, GIOCondition cond) 386 { 387 SocketChardev *s = SOCKET_CHARDEV(chr); 388 return qio_channel_create_watch(s->ioc, cond); 389 } 390 391 static void remove_hup_source(SocketChardev *s) 392 { 393 if (s->hup_source != NULL) { 394 g_source_destroy(s->hup_source); 395 g_source_unref(s->hup_source); 396 s->hup_source = NULL; 397 } 398 } 399 400 static void tcp_chr_free_connection(Chardev *chr) 401 { 402 SocketChardev *s = SOCKET_CHARDEV(chr); 403 int i; 404 405 if (s->read_msgfds_num) { 406 for (i = 0; i < s->read_msgfds_num; i++) { 407 close(s->read_msgfds[i]); 408 } 409 g_free(s->read_msgfds); 410 s->read_msgfds = NULL; 411 s->read_msgfds_num = 0; 412 } 413 414 remove_hup_source(s); 415 416 tcp_set_msgfds(chr, NULL, 0); 417 remove_fd_in_watch(chr); 418 object_unref(OBJECT(s->sioc)); 419 s->sioc = NULL; 420 object_unref(OBJECT(s->ioc)); 421 s->ioc = NULL; 422 g_free(chr->filename); 423 chr->filename = NULL; 424 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 425 } 426 427 static const char *qemu_chr_socket_protocol(SocketChardev *s) 428 { 429 if (s->is_telnet) { 430 return "telnet"; 431 } 432 return s->is_websock ? "websocket" : "tcp"; 433 } 434 435 static char *qemu_chr_socket_address(SocketChardev *s, const char *prefix) 436 { 437 switch (s->addr->type) { 438 case SOCKET_ADDRESS_TYPE_INET: 439 return g_strdup_printf("%s%s:%s:%s%s", prefix, 440 qemu_chr_socket_protocol(s), 441 s->addr->u.inet.host, 442 s->addr->u.inet.port, 443 s->is_listen ? ",server" : ""); 444 break; 445 case SOCKET_ADDRESS_TYPE_UNIX: 446 return g_strdup_printf("%sunix:%s%s", prefix, 447 s->addr->u.q_unix.path, 448 s->is_listen ? ",server" : ""); 449 break; 450 case SOCKET_ADDRESS_TYPE_FD: 451 return g_strdup_printf("%sfd:%s%s", prefix, s->addr->u.fd.str, 452 s->is_listen ? ",server" : ""); 453 break; 454 case SOCKET_ADDRESS_TYPE_VSOCK: 455 return g_strdup_printf("%svsock:%s:%s", prefix, 456 s->addr->u.vsock.cid, 457 s->addr->u.vsock.port); 458 default: 459 abort(); 460 } 461 } 462 463 static void update_disconnected_filename(SocketChardev *s) 464 { 465 Chardev *chr = CHARDEV(s); 466 467 g_free(chr->filename); 468 if (s->addr) { 469 chr->filename = qemu_chr_socket_address(s, "disconnected:"); 470 } else { 471 chr->filename = g_strdup("disconnected:socket"); 472 } 473 } 474 475 /* NB may be called even if tcp_chr_connect has not been 476 * reached, due to TLS or telnet initialization failure, 477 * so can *not* assume s->state == TCP_CHARDEV_STATE_CONNECTED 478 * This must be called with chr->chr_write_lock held. 479 */ 480 static void tcp_chr_disconnect_locked(Chardev *chr) 481 { 482 SocketChardev *s = SOCKET_CHARDEV(chr); 483 bool emit_close = s->state == TCP_CHARDEV_STATE_CONNECTED; 484 485 tcp_chr_free_connection(chr); 486 487 if (s->listener) { 488 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 489 chr, NULL, chr->gcontext); 490 } 491 update_disconnected_filename(s); 492 if (emit_close) { 493 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 494 } 495 if (s->reconnect_time && !s->reconnect_timer) { 496 qemu_chr_socket_restart_timer(chr); 497 } 498 } 499 500 static void tcp_chr_disconnect(Chardev *chr) 501 { 502 qemu_mutex_lock(&chr->chr_write_lock); 503 tcp_chr_disconnect_locked(chr); 504 qemu_mutex_unlock(&chr->chr_write_lock); 505 } 506 507 static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) 508 { 509 Chardev *chr = CHARDEV(opaque); 510 SocketChardev *s = SOCKET_CHARDEV(opaque); 511 uint8_t buf[CHR_READ_BUF_LEN]; 512 int len, size; 513 514 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) || 515 s->max_size <= 0) { 516 return TRUE; 517 } 518 len = sizeof(buf); 519 if (len > s->max_size) { 520 len = s->max_size; 521 } 522 size = tcp_chr_recv(chr, (void *)buf, len); 523 if (size == 0 || (size == -1 && errno != EAGAIN)) { 524 /* connection closed */ 525 tcp_chr_disconnect(chr); 526 } else if (size > 0) { 527 if (s->do_telnetopt) { 528 tcp_chr_process_IAC_bytes(chr, s, buf, &size); 529 } 530 if (size > 0) { 531 qemu_chr_be_write(chr, buf, size); 532 } 533 } 534 535 return TRUE; 536 } 537 538 static gboolean tcp_chr_hup(QIOChannel *channel, 539 GIOCondition cond, 540 void *opaque) 541 { 542 Chardev *chr = CHARDEV(opaque); 543 tcp_chr_disconnect(chr); 544 return G_SOURCE_REMOVE; 545 } 546 547 static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len) 548 { 549 SocketChardev *s = SOCKET_CHARDEV(chr); 550 int size; 551 552 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 553 return 0; 554 } 555 556 qio_channel_set_blocking(s->ioc, true, NULL); 557 size = tcp_chr_recv(chr, (void *) buf, len); 558 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 559 qio_channel_set_blocking(s->ioc, false, NULL); 560 } 561 if (size == 0) { 562 /* connection closed */ 563 tcp_chr_disconnect(chr); 564 } 565 566 return size; 567 } 568 569 static char *qemu_chr_compute_filename(SocketChardev *s) 570 { 571 struct sockaddr_storage *ss = &s->sioc->localAddr; 572 struct sockaddr_storage *ps = &s->sioc->remoteAddr; 573 socklen_t ss_len = s->sioc->localAddrLen; 574 socklen_t ps_len = s->sioc->remoteAddrLen; 575 char shost[NI_MAXHOST], sserv[NI_MAXSERV]; 576 char phost[NI_MAXHOST], pserv[NI_MAXSERV]; 577 const char *left = "", *right = ""; 578 579 switch (ss->ss_family) { 580 #ifndef _WIN32 581 case AF_UNIX: 582 return g_strdup_printf("unix:%s%s", 583 ((struct sockaddr_un *)(ss))->sun_path, 584 s->is_listen ? ",server" : ""); 585 #endif 586 case AF_INET6: 587 left = "["; 588 right = "]"; 589 /* fall through */ 590 case AF_INET: 591 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost), 592 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV); 593 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost), 594 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV); 595 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s", 596 qemu_chr_socket_protocol(s), 597 left, shost, right, sserv, 598 s->is_listen ? ",server" : "", 599 left, phost, right, pserv); 600 601 default: 602 return g_strdup_printf("unknown"); 603 } 604 } 605 606 static void update_ioc_handlers(SocketChardev *s) 607 { 608 Chardev *chr = CHARDEV(s); 609 610 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 611 return; 612 } 613 614 remove_fd_in_watch(chr); 615 chr->gsource = io_add_watch_poll(chr, s->ioc, 616 tcp_chr_read_poll, 617 tcp_chr_read, chr, 618 chr->gcontext); 619 620 remove_hup_source(s); 621 s->hup_source = qio_channel_create_watch(s->ioc, G_IO_HUP); 622 g_source_set_callback(s->hup_source, (GSourceFunc)tcp_chr_hup, 623 chr, NULL); 624 g_source_attach(s->hup_source, chr->gcontext); 625 } 626 627 static void tcp_chr_connect(void *opaque) 628 { 629 Chardev *chr = CHARDEV(opaque); 630 SocketChardev *s = SOCKET_CHARDEV(opaque); 631 632 g_free(chr->filename); 633 chr->filename = qemu_chr_compute_filename(s); 634 635 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTED); 636 update_ioc_handlers(s); 637 qemu_chr_be_event(chr, CHR_EVENT_OPENED); 638 } 639 640 static void tcp_chr_telnet_destroy(SocketChardev *s) 641 { 642 if (s->telnet_source) { 643 g_source_destroy(s->telnet_source); 644 g_source_unref(s->telnet_source); 645 s->telnet_source = NULL; 646 } 647 } 648 649 static void tcp_chr_update_read_handler(Chardev *chr) 650 { 651 SocketChardev *s = SOCKET_CHARDEV(chr); 652 653 if (s->listener && s->state == TCP_CHARDEV_STATE_DISCONNECTED) { 654 /* 655 * It's possible that chardev context is changed in 656 * qemu_chr_be_update_read_handlers(). Reset it for QIO net 657 * listener if there is. 658 */ 659 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 660 chr, NULL, chr->gcontext); 661 } 662 663 if (s->telnet_source) { 664 tcp_chr_telnet_init(CHARDEV(s)); 665 } 666 667 update_ioc_handlers(s); 668 } 669 670 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, 671 GIOCondition cond G_GNUC_UNUSED, 672 gpointer user_data) 673 { 674 SocketChardev *s = user_data; 675 Chardev *chr = CHARDEV(s); 676 TCPChardevTelnetInit *init = s->telnet_init; 677 ssize_t ret; 678 679 assert(init); 680 681 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL); 682 if (ret < 0) { 683 if (ret == QIO_CHANNEL_ERR_BLOCK) { 684 ret = 0; 685 } else { 686 tcp_chr_disconnect(chr); 687 goto end; 688 } 689 } 690 init->buflen -= ret; 691 692 if (init->buflen == 0) { 693 tcp_chr_connect(chr); 694 goto end; 695 } 696 697 memmove(init->buf, init->buf + ret, init->buflen); 698 699 return G_SOURCE_CONTINUE; 700 701 end: 702 g_free(s->telnet_init); 703 s->telnet_init = NULL; 704 g_source_unref(s->telnet_source); 705 s->telnet_source = NULL; 706 return G_SOURCE_REMOVE; 707 } 708 709 static void tcp_chr_telnet_init(Chardev *chr) 710 { 711 SocketChardev *s = SOCKET_CHARDEV(chr); 712 TCPChardevTelnetInit *init; 713 size_t n = 0; 714 715 /* Destroy existing task */ 716 tcp_chr_telnet_destroy(s); 717 718 if (s->telnet_init) { 719 /* We are possibly during a handshake already */ 720 goto cont; 721 } 722 723 s->telnet_init = g_new0(TCPChardevTelnetInit, 1); 724 init = s->telnet_init; 725 726 #define IACSET(x, a, b, c) \ 727 do { \ 728 x[n++] = a; \ 729 x[n++] = b; \ 730 x[n++] = c; \ 731 } while (0) 732 733 if (!s->is_tn3270) { 734 init->buflen = 12; 735 /* Prep the telnet negotion to put telnet in binary, 736 * no echo, single char mode */ 737 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ 738 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ 739 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ 740 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ 741 } else { 742 init->buflen = 21; 743 /* Prep the TN3270 negotion based on RFC1576 */ 744 IACSET(init->buf, 0xff, 0xfd, 0x19); /* IAC DO EOR */ 745 IACSET(init->buf, 0xff, 0xfb, 0x19); /* IAC WILL EOR */ 746 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO BINARY */ 747 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL BINARY */ 748 IACSET(init->buf, 0xff, 0xfd, 0x18); /* IAC DO TERMINAL TYPE */ 749 IACSET(init->buf, 0xff, 0xfa, 0x18); /* IAC SB TERMINAL TYPE */ 750 IACSET(init->buf, 0x01, 0xff, 0xf0); /* SEND IAC SE */ 751 } 752 753 #undef IACSET 754 755 cont: 756 s->telnet_source = qio_channel_add_watch_source(s->ioc, G_IO_OUT, 757 tcp_chr_telnet_init_io, 758 s, NULL, 759 chr->gcontext); 760 } 761 762 763 static void tcp_chr_websock_handshake(QIOTask *task, gpointer user_data) 764 { 765 Chardev *chr = user_data; 766 SocketChardev *s = user_data; 767 768 if (qio_task_propagate_error(task, NULL)) { 769 tcp_chr_disconnect(chr); 770 } else { 771 if (s->do_telnetopt) { 772 tcp_chr_telnet_init(chr); 773 } else { 774 tcp_chr_connect(chr); 775 } 776 } 777 } 778 779 780 static void tcp_chr_websock_init(Chardev *chr) 781 { 782 SocketChardev *s = SOCKET_CHARDEV(chr); 783 QIOChannelWebsock *wioc = NULL; 784 gchar *name; 785 786 wioc = qio_channel_websock_new_server(s->ioc); 787 788 name = g_strdup_printf("chardev-websocket-server-%s", chr->label); 789 qio_channel_set_name(QIO_CHANNEL(wioc), name); 790 g_free(name); 791 object_unref(OBJECT(s->ioc)); 792 s->ioc = QIO_CHANNEL(wioc); 793 794 qio_channel_websock_handshake(wioc, tcp_chr_websock_handshake, chr, NULL); 795 } 796 797 798 static void tcp_chr_tls_handshake(QIOTask *task, 799 gpointer user_data) 800 { 801 Chardev *chr = user_data; 802 SocketChardev *s = user_data; 803 804 if (qio_task_propagate_error(task, NULL)) { 805 tcp_chr_disconnect(chr); 806 } else { 807 if (s->is_websock) { 808 tcp_chr_websock_init(chr); 809 } else if (s->do_telnetopt) { 810 tcp_chr_telnet_init(chr); 811 } else { 812 tcp_chr_connect(chr); 813 } 814 } 815 } 816 817 818 static void tcp_chr_tls_init(Chardev *chr) 819 { 820 SocketChardev *s = SOCKET_CHARDEV(chr); 821 QIOChannelTLS *tioc; 822 gchar *name; 823 824 if (s->is_listen) { 825 tioc = qio_channel_tls_new_server( 826 s->ioc, s->tls_creds, 827 s->tls_authz, 828 NULL); 829 } else { 830 tioc = qio_channel_tls_new_client( 831 s->ioc, s->tls_creds, 832 s->addr->u.inet.host, 833 NULL); 834 } 835 if (tioc == NULL) { 836 tcp_chr_disconnect(chr); 837 return; 838 } 839 name = g_strdup_printf("chardev-tls-%s-%s", 840 s->is_listen ? "server" : "client", 841 chr->label); 842 qio_channel_set_name(QIO_CHANNEL(tioc), name); 843 g_free(name); 844 object_unref(OBJECT(s->ioc)); 845 s->ioc = QIO_CHANNEL(tioc); 846 847 qio_channel_tls_handshake(tioc, 848 tcp_chr_tls_handshake, 849 chr, 850 NULL, 851 chr->gcontext); 852 } 853 854 855 static void tcp_chr_set_client_ioc_name(Chardev *chr, 856 QIOChannelSocket *sioc) 857 { 858 SocketChardev *s = SOCKET_CHARDEV(chr); 859 char *name; 860 name = g_strdup_printf("chardev-tcp-%s-%s", 861 s->is_listen ? "server" : "client", 862 chr->label); 863 qio_channel_set_name(QIO_CHANNEL(sioc), name); 864 g_free(name); 865 866 } 867 868 static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc) 869 { 870 SocketChardev *s = SOCKET_CHARDEV(chr); 871 872 if (s->state != TCP_CHARDEV_STATE_CONNECTING) { 873 return -1; 874 } 875 876 s->ioc = QIO_CHANNEL(sioc); 877 object_ref(OBJECT(sioc)); 878 s->sioc = sioc; 879 object_ref(OBJECT(sioc)); 880 881 qio_channel_set_blocking(s->ioc, false, NULL); 882 883 if (s->do_nodelay) { 884 qio_channel_set_delay(s->ioc, false); 885 } 886 if (s->listener) { 887 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 888 NULL, chr->gcontext); 889 } 890 891 if (s->tls_creds) { 892 tcp_chr_tls_init(chr); 893 } else if (s->is_websock) { 894 tcp_chr_websock_init(chr); 895 } else if (s->do_telnetopt) { 896 tcp_chr_telnet_init(chr); 897 } else { 898 tcp_chr_connect(chr); 899 } 900 901 return 0; 902 } 903 904 905 static int tcp_chr_add_client(Chardev *chr, int fd) 906 { 907 int ret; 908 QIOChannelSocket *sioc; 909 SocketChardev *s = SOCKET_CHARDEV(chr); 910 911 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 912 return -1; 913 } 914 915 sioc = qio_channel_socket_new_fd(fd, NULL); 916 if (!sioc) { 917 return -1; 918 } 919 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 920 tcp_chr_set_client_ioc_name(chr, sioc); 921 ret = tcp_chr_new_client(chr, sioc); 922 object_unref(OBJECT(sioc)); 923 return ret; 924 } 925 926 static void tcp_chr_accept(QIONetListener *listener, 927 QIOChannelSocket *cioc, 928 void *opaque) 929 { 930 Chardev *chr = CHARDEV(opaque); 931 SocketChardev *s = SOCKET_CHARDEV(chr); 932 933 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 934 tcp_chr_set_client_ioc_name(chr, cioc); 935 tcp_chr_new_client(chr, cioc); 936 } 937 938 939 static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp) 940 { 941 SocketChardev *s = SOCKET_CHARDEV(chr); 942 QIOChannelSocket *sioc = qio_channel_socket_new(); 943 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 944 tcp_chr_set_client_ioc_name(chr, sioc); 945 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) { 946 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 947 object_unref(OBJECT(sioc)); 948 return -1; 949 } 950 tcp_chr_new_client(chr, sioc); 951 object_unref(OBJECT(sioc)); 952 return 0; 953 } 954 955 956 static void tcp_chr_accept_server_sync(Chardev *chr) 957 { 958 SocketChardev *s = SOCKET_CHARDEV(chr); 959 QIOChannelSocket *sioc; 960 info_report("QEMU waiting for connection on: %s", 961 chr->filename); 962 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 963 sioc = qio_net_listener_wait_client(s->listener); 964 tcp_chr_set_client_ioc_name(chr, sioc); 965 tcp_chr_new_client(chr, sioc); 966 object_unref(OBJECT(sioc)); 967 } 968 969 970 static int tcp_chr_wait_connected(Chardev *chr, Error **errp) 971 { 972 SocketChardev *s = SOCKET_CHARDEV(chr); 973 const char *opts[] = { "telnet", "tn3270", "websock", "tls-creds" }; 974 bool optset[] = { s->is_telnet, s->is_tn3270, s->is_websock, s->tls_creds }; 975 size_t i; 976 977 QEMU_BUILD_BUG_ON(G_N_ELEMENTS(opts) != G_N_ELEMENTS(optset)); 978 for (i = 0; i < G_N_ELEMENTS(opts); i++) { 979 if (optset[i]) { 980 error_setg(errp, 981 "'%s' option is incompatible with waiting for " 982 "connection completion", opts[i]); 983 return -1; 984 } 985 } 986 987 tcp_chr_reconn_timer_cancel(s); 988 989 /* 990 * We expect states to be as follows: 991 * 992 * - server 993 * - wait -> CONNECTED 994 * - nowait -> DISCONNECTED 995 * - client 996 * - reconnect == 0 -> CONNECTED 997 * - reconnect != 0 -> CONNECTING 998 * 999 */ 1000 if (s->state == TCP_CHARDEV_STATE_CONNECTING) { 1001 if (!s->connect_task) { 1002 error_setg(errp, 1003 "Unexpected 'connecting' state without connect task " 1004 "while waiting for connection completion"); 1005 return -1; 1006 } 1007 /* 1008 * tcp_chr_wait_connected should only ever be run from the 1009 * main loop thread associated with chr->gcontext, otherwise 1010 * qio_task_wait_thread has a dangerous race condition with 1011 * free'ing of the s->connect_task object. 1012 * 1013 * Acquiring the main context doesn't 100% prove we're in 1014 * the main loop thread, but it does at least guarantee 1015 * that the main loop won't be executed by another thread 1016 * avoiding the race condition with the task idle callback. 1017 */ 1018 g_main_context_acquire(chr->gcontext); 1019 qio_task_wait_thread(s->connect_task); 1020 g_main_context_release(chr->gcontext); 1021 1022 /* 1023 * The completion callback (qemu_chr_socket_connected) for 1024 * s->connect_task should have set this to NULL by the time 1025 * qio_task_wait_thread has returned. 1026 */ 1027 assert(!s->connect_task); 1028 1029 /* 1030 * NB we are *not* guaranteed to have "s->state == ..CONNECTED" 1031 * at this point as this first connect may be failed, so 1032 * allow the next loop to run regardless. 1033 */ 1034 } 1035 1036 while (s->state != TCP_CHARDEV_STATE_CONNECTED) { 1037 if (s->is_listen) { 1038 tcp_chr_accept_server_sync(chr); 1039 } else { 1040 Error *err = NULL; 1041 if (tcp_chr_connect_client_sync(chr, &err) < 0) { 1042 if (s->reconnect_time) { 1043 error_free(err); 1044 g_usleep(s->reconnect_time * 1000ULL * 1000ULL); 1045 } else { 1046 error_propagate(errp, err); 1047 return -1; 1048 } 1049 } 1050 } 1051 } 1052 1053 return 0; 1054 } 1055 1056 static void char_socket_finalize(Object *obj) 1057 { 1058 Chardev *chr = CHARDEV(obj); 1059 SocketChardev *s = SOCKET_CHARDEV(obj); 1060 1061 tcp_chr_free_connection(chr); 1062 tcp_chr_reconn_timer_cancel(s); 1063 qapi_free_SocketAddress(s->addr); 1064 tcp_chr_telnet_destroy(s); 1065 g_free(s->telnet_init); 1066 if (s->listener) { 1067 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 1068 NULL, chr->gcontext); 1069 object_unref(OBJECT(s->listener)); 1070 } 1071 if (s->tls_creds) { 1072 object_unref(OBJECT(s->tls_creds)); 1073 } 1074 g_free(s->tls_authz); 1075 1076 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 1077 } 1078 1079 static void qemu_chr_socket_connected(QIOTask *task, void *opaque) 1080 { 1081 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1082 Chardev *chr = CHARDEV(opaque); 1083 SocketChardev *s = SOCKET_CHARDEV(chr); 1084 Error *err = NULL; 1085 1086 s->connect_task = NULL; 1087 1088 if (qio_task_propagate_error(task, &err)) { 1089 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 1090 check_report_connect_error(chr, err); 1091 goto cleanup; 1092 } 1093 1094 s->connect_err_reported = false; 1095 tcp_chr_new_client(chr, sioc); 1096 1097 cleanup: 1098 object_unref(OBJECT(sioc)); 1099 } 1100 1101 1102 static void tcp_chr_connect_client_task(QIOTask *task, 1103 gpointer opaque) 1104 { 1105 QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1106 SocketAddress *addr = opaque; 1107 Error *err = NULL; 1108 1109 qio_channel_socket_connect_sync(ioc, addr, &err); 1110 1111 qio_task_set_error(task, err); 1112 } 1113 1114 1115 static void tcp_chr_connect_client_async(Chardev *chr) 1116 { 1117 SocketChardev *s = SOCKET_CHARDEV(chr); 1118 QIOChannelSocket *sioc; 1119 1120 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 1121 sioc = qio_channel_socket_new(); 1122 tcp_chr_set_client_ioc_name(chr, sioc); 1123 /* 1124 * Normally code would use the qio_channel_socket_connect_async 1125 * method which uses a QIOTask + qio_task_set_error internally 1126 * to avoid blocking. The tcp_chr_wait_connected method, however, 1127 * needs a way to synchronize with completion of the background 1128 * connect task which can't be done with the QIOChannelSocket 1129 * async APIs. Thus we must use QIOTask directly to implement 1130 * the non-blocking concept locally. 1131 */ 1132 s->connect_task = qio_task_new(OBJECT(sioc), 1133 qemu_chr_socket_connected, 1134 object_ref(OBJECT(chr)), 1135 (GDestroyNotify)object_unref); 1136 qio_task_run_in_thread(s->connect_task, 1137 tcp_chr_connect_client_task, 1138 s->addr, 1139 NULL, 1140 chr->gcontext); 1141 } 1142 1143 static gboolean socket_reconnect_timeout(gpointer opaque) 1144 { 1145 Chardev *chr = CHARDEV(opaque); 1146 SocketChardev *s = SOCKET_CHARDEV(opaque); 1147 1148 qemu_mutex_lock(&chr->chr_write_lock); 1149 g_source_unref(s->reconnect_timer); 1150 s->reconnect_timer = NULL; 1151 qemu_mutex_unlock(&chr->chr_write_lock); 1152 1153 if (chr->be_open) { 1154 return false; 1155 } 1156 1157 tcp_chr_connect_client_async(chr); 1158 1159 return false; 1160 } 1161 1162 1163 static int qmp_chardev_open_socket_server(Chardev *chr, 1164 bool is_telnet, 1165 bool is_waitconnect, 1166 Error **errp) 1167 { 1168 SocketChardev *s = SOCKET_CHARDEV(chr); 1169 char *name; 1170 if (is_telnet) { 1171 s->do_telnetopt = 1; 1172 } 1173 s->listener = qio_net_listener_new(); 1174 1175 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label); 1176 qio_net_listener_set_name(s->listener, name); 1177 g_free(name); 1178 1179 if (qio_net_listener_open_sync(s->listener, s->addr, 1, errp) < 0) { 1180 object_unref(OBJECT(s->listener)); 1181 s->listener = NULL; 1182 return -1; 1183 } 1184 1185 qapi_free_SocketAddress(s->addr); 1186 s->addr = socket_local_address(s->listener->sioc[0]->fd, errp); 1187 update_disconnected_filename(s); 1188 1189 if (is_waitconnect) { 1190 tcp_chr_accept_server_sync(chr); 1191 } else { 1192 qio_net_listener_set_client_func_full(s->listener, 1193 tcp_chr_accept, 1194 chr, NULL, 1195 chr->gcontext); 1196 } 1197 1198 return 0; 1199 } 1200 1201 1202 static int qmp_chardev_open_socket_client(Chardev *chr, 1203 int64_t reconnect, 1204 Error **errp) 1205 { 1206 SocketChardev *s = SOCKET_CHARDEV(chr); 1207 1208 if (reconnect > 0) { 1209 s->reconnect_time = reconnect; 1210 tcp_chr_connect_client_async(chr); 1211 return 0; 1212 } else { 1213 return tcp_chr_connect_client_sync(chr, errp); 1214 } 1215 } 1216 1217 1218 static bool qmp_chardev_validate_socket(ChardevSocket *sock, 1219 SocketAddress *addr, 1220 Error **errp) 1221 { 1222 /* Validate any options which have a dependency on address type */ 1223 switch (addr->type) { 1224 case SOCKET_ADDRESS_TYPE_FD: 1225 if (sock->has_reconnect) { 1226 error_setg(errp, 1227 "'reconnect' option is incompatible with " 1228 "'fd' address type"); 1229 return false; 1230 } 1231 if (sock->has_tls_creds && 1232 !(sock->has_server && sock->server)) { 1233 error_setg(errp, 1234 "'tls_creds' option is incompatible with " 1235 "'fd' address type as client"); 1236 return false; 1237 } 1238 break; 1239 1240 case SOCKET_ADDRESS_TYPE_UNIX: 1241 if (sock->has_tls_creds) { 1242 error_setg(errp, 1243 "'tls_creds' option is incompatible with " 1244 "'unix' address type"); 1245 return false; 1246 } 1247 break; 1248 1249 case SOCKET_ADDRESS_TYPE_INET: 1250 break; 1251 1252 case SOCKET_ADDRESS_TYPE_VSOCK: 1253 if (sock->has_tls_creds) { 1254 error_setg(errp, 1255 "'tls_creds' option is incompatible with " 1256 "'vsock' address type"); 1257 return false; 1258 } 1259 1260 default: 1261 break; 1262 } 1263 1264 if (sock->has_tls_authz && !sock->has_tls_creds) { 1265 error_setg(errp, "'tls_authz' option requires 'tls_creds' option"); 1266 return false; 1267 } 1268 1269 /* Validate any options which have a dependancy on client vs server */ 1270 if (!sock->has_server || sock->server) { 1271 if (sock->has_reconnect) { 1272 error_setg(errp, 1273 "'reconnect' option is incompatible with " 1274 "socket in server listen mode"); 1275 return false; 1276 } 1277 } else { 1278 if (sock->has_websocket && sock->websocket) { 1279 error_setg(errp, "%s", "Websocket client is not implemented"); 1280 return false; 1281 } 1282 if (sock->has_wait) { 1283 warn_report("'wait' option is deprecated with " 1284 "socket in client connect mode"); 1285 if (sock->wait) { 1286 error_setg(errp, "%s", 1287 "'wait' option is incompatible with " 1288 "socket in client connect mode"); 1289 return false; 1290 } 1291 } 1292 } 1293 1294 return true; 1295 } 1296 1297 1298 static void qmp_chardev_open_socket(Chardev *chr, 1299 ChardevBackend *backend, 1300 bool *be_opened, 1301 Error **errp) 1302 { 1303 SocketChardev *s = SOCKET_CHARDEV(chr); 1304 ChardevSocket *sock = backend->u.socket.data; 1305 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false; 1306 bool is_listen = sock->has_server ? sock->server : true; 1307 bool is_telnet = sock->has_telnet ? sock->telnet : false; 1308 bool is_tn3270 = sock->has_tn3270 ? sock->tn3270 : false; 1309 bool is_waitconnect = sock->has_wait ? sock->wait : false; 1310 bool is_websock = sock->has_websocket ? sock->websocket : false; 1311 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; 1312 SocketAddress *addr; 1313 1314 s->is_listen = is_listen; 1315 s->is_telnet = is_telnet; 1316 s->is_tn3270 = is_tn3270; 1317 s->is_websock = is_websock; 1318 s->do_nodelay = do_nodelay; 1319 if (sock->tls_creds) { 1320 Object *creds; 1321 creds = object_resolve_path_component( 1322 object_get_objects_root(), sock->tls_creds); 1323 if (!creds) { 1324 error_setg(errp, "No TLS credentials with id '%s'", 1325 sock->tls_creds); 1326 return; 1327 } 1328 s->tls_creds = (QCryptoTLSCreds *) 1329 object_dynamic_cast(creds, 1330 TYPE_QCRYPTO_TLS_CREDS); 1331 if (!s->tls_creds) { 1332 error_setg(errp, "Object with id '%s' is not TLS credentials", 1333 sock->tls_creds); 1334 return; 1335 } 1336 object_ref(OBJECT(s->tls_creds)); 1337 if (is_listen) { 1338 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 1339 error_setg(errp, "%s", 1340 "Expected TLS credentials for server endpoint"); 1341 return; 1342 } 1343 } else { 1344 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { 1345 error_setg(errp, "%s", 1346 "Expected TLS credentials for client endpoint"); 1347 return; 1348 } 1349 } 1350 } 1351 s->tls_authz = g_strdup(sock->tls_authz); 1352 1353 s->addr = addr = socket_address_flatten(sock->addr); 1354 1355 if (!qmp_chardev_validate_socket(sock, addr, errp)) { 1356 return; 1357 } 1358 1359 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); 1360 /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */ 1361 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) { 1362 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); 1363 } 1364 1365 /* be isn't opened until we get a connection */ 1366 *be_opened = false; 1367 1368 update_disconnected_filename(s); 1369 1370 if (s->is_listen) { 1371 if (qmp_chardev_open_socket_server(chr, is_telnet || is_tn3270, 1372 is_waitconnect, errp) < 0) { 1373 return; 1374 } 1375 } else { 1376 if (qmp_chardev_open_socket_client(chr, reconnect, errp) < 0) { 1377 return; 1378 } 1379 } 1380 } 1381 1382 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend, 1383 Error **errp) 1384 { 1385 const char *path = qemu_opt_get(opts, "path"); 1386 const char *host = qemu_opt_get(opts, "host"); 1387 const char *port = qemu_opt_get(opts, "port"); 1388 const char *fd = qemu_opt_get(opts, "fd"); 1389 bool tight = qemu_opt_get_bool(opts, "tight", true); 1390 bool abstract = qemu_opt_get_bool(opts, "abstract", false); 1391 SocketAddressLegacy *addr; 1392 ChardevSocket *sock; 1393 1394 if ((!!path + !!fd + !!host) != 1) { 1395 error_setg(errp, 1396 "Exactly one of 'path', 'fd' or 'host' required"); 1397 return; 1398 } 1399 1400 if (host && !port) { 1401 error_setg(errp, "chardev: socket: no port given"); 1402 return; 1403 } 1404 1405 backend->type = CHARDEV_BACKEND_KIND_SOCKET; 1406 sock = backend->u.socket.data = g_new0(ChardevSocket, 1); 1407 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock)); 1408 1409 sock->has_nodelay = qemu_opt_get(opts, "delay"); 1410 sock->nodelay = !qemu_opt_get_bool(opts, "delay", true); 1411 /* 1412 * We have different default to QMP for 'server', hence 1413 * we can't just check for existence of 'server' 1414 */ 1415 sock->has_server = true; 1416 sock->server = qemu_opt_get_bool(opts, "server", false); 1417 sock->has_telnet = qemu_opt_get(opts, "telnet"); 1418 sock->telnet = qemu_opt_get_bool(opts, "telnet", false); 1419 sock->has_tn3270 = qemu_opt_get(opts, "tn3270"); 1420 sock->tn3270 = qemu_opt_get_bool(opts, "tn3270", false); 1421 sock->has_websocket = qemu_opt_get(opts, "websocket"); 1422 sock->websocket = qemu_opt_get_bool(opts, "websocket", false); 1423 /* 1424 * We have different default to QMP for 'wait' when 'server' 1425 * is set, hence we can't just check for existence of 'wait' 1426 */ 1427 sock->has_wait = qemu_opt_find(opts, "wait") || sock->server; 1428 sock->wait = qemu_opt_get_bool(opts, "wait", true); 1429 sock->has_reconnect = qemu_opt_find(opts, "reconnect"); 1430 sock->reconnect = qemu_opt_get_number(opts, "reconnect", 0); 1431 sock->has_tls_creds = qemu_opt_get(opts, "tls-creds"); 1432 sock->tls_creds = g_strdup(qemu_opt_get(opts, "tls-creds")); 1433 sock->has_tls_authz = qemu_opt_get(opts, "tls-authz"); 1434 sock->tls_authz = g_strdup(qemu_opt_get(opts, "tls-authz")); 1435 1436 addr = g_new0(SocketAddressLegacy, 1); 1437 if (path) { 1438 UnixSocketAddress *q_unix; 1439 addr->type = SOCKET_ADDRESS_LEGACY_KIND_UNIX; 1440 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 1441 q_unix->path = g_strdup(path); 1442 q_unix->tight = tight; 1443 q_unix->abstract = abstract; 1444 } else if (host) { 1445 addr->type = SOCKET_ADDRESS_LEGACY_KIND_INET; 1446 addr->u.inet.data = g_new(InetSocketAddress, 1); 1447 *addr->u.inet.data = (InetSocketAddress) { 1448 .host = g_strdup(host), 1449 .port = g_strdup(port), 1450 .has_to = qemu_opt_get(opts, "to"), 1451 .to = qemu_opt_get_number(opts, "to", 0), 1452 .has_ipv4 = qemu_opt_get(opts, "ipv4"), 1453 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), 1454 .has_ipv6 = qemu_opt_get(opts, "ipv6"), 1455 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), 1456 }; 1457 } else if (fd) { 1458 addr->type = SOCKET_ADDRESS_LEGACY_KIND_FD; 1459 addr->u.fd.data = g_new(String, 1); 1460 addr->u.fd.data->str = g_strdup(fd); 1461 } else { 1462 g_assert_not_reached(); 1463 } 1464 sock->addr = addr; 1465 } 1466 1467 static void 1468 char_socket_get_addr(Object *obj, Visitor *v, const char *name, 1469 void *opaque, Error **errp) 1470 { 1471 SocketChardev *s = SOCKET_CHARDEV(obj); 1472 1473 visit_type_SocketAddress(v, name, &s->addr, errp); 1474 } 1475 1476 static bool 1477 char_socket_get_connected(Object *obj, Error **errp) 1478 { 1479 SocketChardev *s = SOCKET_CHARDEV(obj); 1480 1481 return s->state == TCP_CHARDEV_STATE_CONNECTED; 1482 } 1483 1484 static void char_socket_class_init(ObjectClass *oc, void *data) 1485 { 1486 ChardevClass *cc = CHARDEV_CLASS(oc); 1487 1488 cc->parse = qemu_chr_parse_socket; 1489 cc->open = qmp_chardev_open_socket; 1490 cc->chr_wait_connected = tcp_chr_wait_connected; 1491 cc->chr_write = tcp_chr_write; 1492 cc->chr_sync_read = tcp_chr_sync_read; 1493 cc->chr_disconnect = tcp_chr_disconnect; 1494 cc->get_msgfds = tcp_get_msgfds; 1495 cc->set_msgfds = tcp_set_msgfds; 1496 cc->chr_add_client = tcp_chr_add_client; 1497 cc->chr_add_watch = tcp_chr_add_watch; 1498 cc->chr_update_read_handler = tcp_chr_update_read_handler; 1499 1500 object_class_property_add(oc, "addr", "SocketAddress", 1501 char_socket_get_addr, NULL, 1502 NULL, NULL); 1503 1504 object_class_property_add_bool(oc, "connected", char_socket_get_connected, 1505 NULL); 1506 } 1507 1508 static const TypeInfo char_socket_type_info = { 1509 .name = TYPE_CHARDEV_SOCKET, 1510 .parent = TYPE_CHARDEV, 1511 .instance_size = sizeof(SocketChardev), 1512 .instance_finalize = char_socket_finalize, 1513 .class_init = char_socket_class_init, 1514 }; 1515 1516 static void register_types(void) 1517 { 1518 type_register_static(&char_socket_type_info); 1519 } 1520 1521 type_init(register_types); 1522