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-websock.h" 29 #include "qemu/error-report.h" 30 #include "qemu/module.h" 31 #include "qemu/option.h" 32 #include "qapi/error.h" 33 #include "qapi/clone-visitor.h" 34 #include "qapi/qapi-visit-sockets.h" 35 #include "qemu/yank.h" 36 #include "trace.h" 37 38 #include "chardev/char-io.h" 39 #include "chardev/char-socket.h" 40 41 static gboolean socket_reconnect_timeout(gpointer opaque); 42 static void tcp_chr_telnet_init(Chardev *chr); 43 44 static void tcp_chr_change_state(SocketChardev *s, TCPChardevState state) 45 { 46 switch (state) { 47 case TCP_CHARDEV_STATE_DISCONNECTED: 48 break; 49 case TCP_CHARDEV_STATE_CONNECTING: 50 assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED); 51 break; 52 case TCP_CHARDEV_STATE_CONNECTED: 53 assert(s->state == TCP_CHARDEV_STATE_CONNECTING); 54 break; 55 } 56 s->state = state; 57 } 58 59 static void tcp_chr_reconn_timer_cancel(SocketChardev *s) 60 { 61 if (s->reconnect_timer) { 62 g_source_destroy(s->reconnect_timer); 63 g_source_unref(s->reconnect_timer); 64 s->reconnect_timer = NULL; 65 } 66 } 67 68 static void qemu_chr_socket_restart_timer(Chardev *chr) 69 { 70 SocketChardev *s = SOCKET_CHARDEV(chr); 71 char *name; 72 73 assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED); 74 assert(!s->reconnect_timer); 75 name = g_strdup_printf("chardev-socket-reconnect-%s", chr->label); 76 s->reconnect_timer = qemu_chr_timeout_add_ms(chr, 77 s->reconnect_time * 1000, 78 socket_reconnect_timeout, 79 chr); 80 g_source_set_name(s->reconnect_timer, name); 81 g_free(name); 82 } 83 84 static void check_report_connect_error(Chardev *chr, 85 Error *err) 86 { 87 SocketChardev *s = SOCKET_CHARDEV(chr); 88 89 if (!s->connect_err_reported) { 90 error_reportf_err(err, 91 "Unable to connect character device %s: ", 92 chr->label); 93 s->connect_err_reported = true; 94 } else { 95 error_free(err); 96 } 97 qemu_chr_socket_restart_timer(chr); 98 } 99 100 static void tcp_chr_accept(QIONetListener *listener, 101 QIOChannelSocket *cioc, 102 void *opaque); 103 104 static int tcp_chr_read_poll(void *opaque); 105 static void tcp_chr_disconnect_locked(Chardev *chr); 106 107 /* Called with chr_write_lock held. */ 108 static int tcp_chr_write(Chardev *chr, const uint8_t *buf, int len) 109 { 110 SocketChardev *s = SOCKET_CHARDEV(chr); 111 112 if (s->state == TCP_CHARDEV_STATE_CONNECTED) { 113 int ret = io_channel_send_full(s->ioc, buf, len, 114 s->write_msgfds, 115 s->write_msgfds_num); 116 117 /* free the written msgfds in any cases 118 * other than ret < 0 && errno == EAGAIN 119 */ 120 if (!(ret < 0 && EAGAIN == errno) 121 && s->write_msgfds_num) { 122 g_free(s->write_msgfds); 123 s->write_msgfds = 0; 124 s->write_msgfds_num = 0; 125 } 126 127 if (ret < 0 && errno != EAGAIN) { 128 if (tcp_chr_read_poll(chr) <= 0) { 129 /* Perform disconnect and return error. */ 130 trace_chr_socket_poll_err(chr, chr->label); 131 tcp_chr_disconnect_locked(chr); 132 } /* else let the read handler finish it properly */ 133 } 134 135 return ret; 136 } else { 137 /* Indicate an error. */ 138 errno = EIO; 139 return -1; 140 } 141 } 142 143 static int tcp_chr_read_poll(void *opaque) 144 { 145 Chardev *chr = CHARDEV(opaque); 146 SocketChardev *s = SOCKET_CHARDEV(opaque); 147 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 148 return 0; 149 } 150 s->max_size = qemu_chr_be_can_write(chr); 151 return s->max_size; 152 } 153 154 static void tcp_chr_process_IAC_bytes(Chardev *chr, 155 SocketChardev *s, 156 uint8_t *buf, int *size) 157 { 158 /* Handle any telnet or tn3270 client's basic IAC options. 159 * For telnet options, it satisfies char by char mode with no echo. 160 * For tn3270 options, it satisfies binary mode with EOR. 161 * All IAC options will be removed from the buf and the do_opt 162 * pointer will be used to track the state of the width of the 163 * IAC information. 164 * 165 * RFC854: "All TELNET commands consist of at least a two byte sequence. 166 * The commands dealing with option negotiation are three byte sequences, 167 * the third byte being the code for the option referenced." 168 * "IAC BREAK", "IAC IP", "IAC NOP" and the double IAC are two bytes. 169 * "IAC SB", "IAC SE" and "IAC EOR" are saved to split up data boundary 170 * for tn3270. 171 * NOP, Break and Interrupt Process(IP) might be encountered during a TN3270 172 * session, and NOP and IP need to be done later. 173 */ 174 175 int i; 176 int j = 0; 177 178 for (i = 0; i < *size; i++) { 179 if (s->do_telnetopt > 1) { 180 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) { 181 /* Double IAC means send an IAC */ 182 if (j != i) { 183 buf[j] = buf[i]; 184 } 185 j++; 186 s->do_telnetopt = 1; 187 } else { 188 if ((unsigned char)buf[i] == IAC_BREAK 189 && s->do_telnetopt == 2) { 190 /* Handle IAC break commands by sending a serial break */ 191 qemu_chr_be_event(chr, CHR_EVENT_BREAK); 192 s->do_telnetopt++; 193 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_EOR 194 || (unsigned char)buf[i] == IAC_SB 195 || (unsigned char)buf[i] == IAC_SE) 196 && s->do_telnetopt == 2) { 197 buf[j++] = IAC; 198 buf[j++] = buf[i]; 199 s->do_telnetopt++; 200 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_IP 201 || (unsigned char)buf[i] == IAC_NOP) 202 && s->do_telnetopt == 2) { 203 /* TODO: IP and NOP need to be implemented later. */ 204 s->do_telnetopt++; 205 } 206 s->do_telnetopt++; 207 } 208 if (s->do_telnetopt >= 4) { 209 s->do_telnetopt = 1; 210 } 211 } else { 212 if ((unsigned char)buf[i] == IAC) { 213 s->do_telnetopt = 2; 214 } else { 215 if (j != i) { 216 buf[j] = buf[i]; 217 } 218 j++; 219 } 220 } 221 } 222 *size = j; 223 } 224 225 static int tcp_get_msgfds(Chardev *chr, int *fds, int num) 226 { 227 SocketChardev *s = SOCKET_CHARDEV(chr); 228 229 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num; 230 231 assert(num <= TCP_MAX_FDS); 232 233 if (to_copy) { 234 int i; 235 236 memcpy(fds, s->read_msgfds, to_copy * sizeof(int)); 237 238 /* Close unused fds */ 239 for (i = to_copy; i < s->read_msgfds_num; i++) { 240 close(s->read_msgfds[i]); 241 } 242 243 g_free(s->read_msgfds); 244 s->read_msgfds = 0; 245 s->read_msgfds_num = 0; 246 } 247 248 return to_copy; 249 } 250 251 static int tcp_set_msgfds(Chardev *chr, int *fds, int num) 252 { 253 SocketChardev *s = SOCKET_CHARDEV(chr); 254 255 /* clear old pending fd array */ 256 g_free(s->write_msgfds); 257 s->write_msgfds = NULL; 258 s->write_msgfds_num = 0; 259 260 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) || 261 !qio_channel_has_feature(s->ioc, 262 QIO_CHANNEL_FEATURE_FD_PASS)) { 263 return -1; 264 } 265 266 if (num) { 267 s->write_msgfds = g_new(int, num); 268 memcpy(s->write_msgfds, fds, num * sizeof(int)); 269 } 270 271 s->write_msgfds_num = num; 272 273 return 0; 274 } 275 276 static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len) 277 { 278 SocketChardev *s = SOCKET_CHARDEV(chr); 279 struct iovec iov = { .iov_base = buf, .iov_len = len }; 280 int ret; 281 size_t i; 282 int *msgfds = NULL; 283 size_t msgfds_num = 0; 284 Error *err = NULL; 285 286 if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) { 287 ret = qio_channel_readv_full(s->ioc, &iov, 1, 288 &msgfds, &msgfds_num, 289 0, &err); 290 } else { 291 ret = qio_channel_readv_full(s->ioc, &iov, 1, 292 NULL, NULL, 293 0, &err); 294 } 295 296 if (msgfds_num) { 297 /* close and clean read_msgfds */ 298 for (i = 0; i < s->read_msgfds_num; i++) { 299 close(s->read_msgfds[i]); 300 } 301 302 if (s->read_msgfds_num) { 303 g_free(s->read_msgfds); 304 } 305 306 s->read_msgfds = msgfds; 307 s->read_msgfds_num = msgfds_num; 308 } 309 310 for (i = 0; i < s->read_msgfds_num; i++) { 311 int fd = s->read_msgfds[i]; 312 if (fd < 0) { 313 continue; 314 } 315 316 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */ 317 qemu_socket_set_block(fd); 318 319 #ifndef MSG_CMSG_CLOEXEC 320 qemu_set_cloexec(fd); 321 #endif 322 } 323 324 if (ret == QIO_CHANNEL_ERR_BLOCK) { 325 errno = EAGAIN; 326 ret = -1; 327 } else if (ret == -1) { 328 trace_chr_socket_recv_err(chr, chr->label, error_get_pretty(err)); 329 error_free(err); 330 errno = EIO; 331 } else if (ret == 0) { 332 trace_chr_socket_recv_eof(chr, chr->label); 333 } 334 335 return ret; 336 } 337 338 static GSource *tcp_chr_add_watch(Chardev *chr, GIOCondition cond) 339 { 340 SocketChardev *s = SOCKET_CHARDEV(chr); 341 if (!s->ioc) { 342 return NULL; 343 } 344 return qio_channel_create_watch(s->ioc, cond); 345 } 346 347 static void remove_hup_source(SocketChardev *s) 348 { 349 if (s->hup_source != NULL) { 350 g_source_destroy(s->hup_source); 351 g_source_unref(s->hup_source); 352 s->hup_source = NULL; 353 } 354 } 355 356 static void char_socket_yank_iochannel(void *opaque) 357 { 358 QIOChannel *ioc = QIO_CHANNEL(opaque); 359 360 qio_channel_shutdown(ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL); 361 } 362 363 static void tcp_chr_free_connection(Chardev *chr) 364 { 365 SocketChardev *s = SOCKET_CHARDEV(chr); 366 int i; 367 368 if (s->read_msgfds_num) { 369 for (i = 0; i < s->read_msgfds_num; i++) { 370 close(s->read_msgfds[i]); 371 } 372 g_free(s->read_msgfds); 373 s->read_msgfds = NULL; 374 s->read_msgfds_num = 0; 375 } 376 377 remove_hup_source(s); 378 379 tcp_set_msgfds(chr, NULL, 0); 380 remove_fd_in_watch(chr); 381 if (s->registered_yank && 382 (s->state == TCP_CHARDEV_STATE_CONNECTING 383 || s->state == TCP_CHARDEV_STATE_CONNECTED)) { 384 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 385 char_socket_yank_iochannel, 386 QIO_CHANNEL(s->sioc)); 387 } 388 389 if (s->ioc) { 390 qio_channel_close(s->ioc, NULL); 391 } 392 object_unref(OBJECT(s->sioc)); 393 s->sioc = NULL; 394 object_unref(OBJECT(s->ioc)); 395 s->ioc = NULL; 396 g_free(chr->filename); 397 chr->filename = NULL; 398 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 399 } 400 401 static const char *qemu_chr_socket_protocol(SocketChardev *s) 402 { 403 if (s->is_telnet) { 404 return "telnet"; 405 } 406 return s->is_websock ? "websocket" : "tcp"; 407 } 408 409 static char *qemu_chr_socket_address(SocketChardev *s, const char *prefix) 410 { 411 switch (s->addr->type) { 412 case SOCKET_ADDRESS_TYPE_INET: 413 return g_strdup_printf("%s%s:%s:%s%s", prefix, 414 qemu_chr_socket_protocol(s), 415 s->addr->u.inet.host, 416 s->addr->u.inet.port, 417 s->is_listen ? ",server=on" : ""); 418 break; 419 case SOCKET_ADDRESS_TYPE_UNIX: 420 { 421 const char *tight = "", *abstract = ""; 422 UnixSocketAddress *sa = &s->addr->u.q_unix; 423 424 #ifdef CONFIG_LINUX 425 if (sa->has_abstract && sa->abstract) { 426 abstract = ",abstract=on"; 427 if (sa->has_tight && sa->tight) { 428 tight = ",tight=on"; 429 } 430 } 431 #endif 432 433 return g_strdup_printf("%sunix:%s%s%s%s", prefix, sa->path, 434 abstract, tight, 435 s->is_listen ? ",server=on" : ""); 436 break; 437 } 438 case SOCKET_ADDRESS_TYPE_FD: 439 return g_strdup_printf("%sfd:%s%s", prefix, s->addr->u.fd.str, 440 s->is_listen ? ",server=on" : ""); 441 break; 442 case SOCKET_ADDRESS_TYPE_VSOCK: 443 return g_strdup_printf("%svsock:%s:%s", prefix, 444 s->addr->u.vsock.cid, 445 s->addr->u.vsock.port); 446 default: 447 abort(); 448 } 449 } 450 451 static void update_disconnected_filename(SocketChardev *s) 452 { 453 Chardev *chr = CHARDEV(s); 454 455 g_free(chr->filename); 456 if (s->addr) { 457 chr->filename = qemu_chr_socket_address(s, "disconnected:"); 458 } else { 459 chr->filename = g_strdup("disconnected:socket"); 460 } 461 } 462 463 /* NB may be called even if tcp_chr_connect has not been 464 * reached, due to TLS or telnet initialization failure, 465 * so can *not* assume s->state == TCP_CHARDEV_STATE_CONNECTED 466 * This must be called with chr->chr_write_lock held. 467 */ 468 static void tcp_chr_disconnect_locked(Chardev *chr) 469 { 470 SocketChardev *s = SOCKET_CHARDEV(chr); 471 bool emit_close = s->state == TCP_CHARDEV_STATE_CONNECTED; 472 473 trace_chr_socket_disconnect(chr, chr->label); 474 tcp_chr_free_connection(chr); 475 476 if (s->listener) { 477 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 478 chr, NULL, chr->gcontext); 479 } 480 update_disconnected_filename(s); 481 if (emit_close) { 482 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 483 } 484 if (s->reconnect_time && !s->reconnect_timer) { 485 qemu_chr_socket_restart_timer(chr); 486 } 487 } 488 489 static void tcp_chr_disconnect(Chardev *chr) 490 { 491 qemu_mutex_lock(&chr->chr_write_lock); 492 tcp_chr_disconnect_locked(chr); 493 qemu_mutex_unlock(&chr->chr_write_lock); 494 } 495 496 static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) 497 { 498 Chardev *chr = CHARDEV(opaque); 499 SocketChardev *s = SOCKET_CHARDEV(opaque); 500 uint8_t buf[CHR_READ_BUF_LEN]; 501 int len, size; 502 503 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) || 504 s->max_size <= 0) { 505 return TRUE; 506 } 507 len = sizeof(buf); 508 if (len > s->max_size) { 509 len = s->max_size; 510 } 511 size = tcp_chr_recv(chr, (void *)buf, len); 512 if (size == 0 || (size == -1 && errno != EAGAIN)) { 513 /* connection closed */ 514 tcp_chr_disconnect(chr); 515 } else if (size > 0) { 516 if (s->do_telnetopt) { 517 tcp_chr_process_IAC_bytes(chr, s, buf, &size); 518 } 519 if (size > 0) { 520 qemu_chr_be_write(chr, buf, size); 521 } 522 } 523 524 return TRUE; 525 } 526 527 static gboolean tcp_chr_hup(QIOChannel *channel, 528 GIOCondition cond, 529 void *opaque) 530 { 531 Chardev *chr = CHARDEV(opaque); 532 trace_chr_socket_hangup(chr, chr->label); 533 tcp_chr_disconnect(chr); 534 return G_SOURCE_REMOVE; 535 } 536 537 static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len) 538 { 539 SocketChardev *s = SOCKET_CHARDEV(chr); 540 int size; 541 int saved_errno; 542 543 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 544 return 0; 545 } 546 547 qio_channel_set_blocking(s->ioc, true, NULL); 548 size = tcp_chr_recv(chr, (void *) buf, len); 549 saved_errno = errno; 550 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 551 qio_channel_set_blocking(s->ioc, false, NULL); 552 } 553 if (size == 0) { 554 /* connection closed */ 555 tcp_chr_disconnect(chr); 556 } 557 558 errno = saved_errno; 559 return size; 560 } 561 562 static char *qemu_chr_compute_filename(SocketChardev *s) 563 { 564 struct sockaddr_storage *ss = &s->sioc->localAddr; 565 struct sockaddr_storage *ps = &s->sioc->remoteAddr; 566 socklen_t ss_len = s->sioc->localAddrLen; 567 socklen_t ps_len = s->sioc->remoteAddrLen; 568 char shost[NI_MAXHOST], sserv[NI_MAXSERV]; 569 char phost[NI_MAXHOST], pserv[NI_MAXSERV]; 570 const char *left = "", *right = ""; 571 572 switch (ss->ss_family) { 573 case AF_UNIX: 574 return g_strdup_printf("unix:%s%s", 575 ((struct sockaddr_un *)(ss))->sun_path, 576 s->is_listen ? ",server=on" : ""); 577 case AF_INET6: 578 left = "["; 579 right = "]"; 580 /* fall through */ 581 case AF_INET: 582 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost), 583 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV); 584 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost), 585 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV); 586 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s", 587 qemu_chr_socket_protocol(s), 588 left, shost, right, sserv, 589 s->is_listen ? ",server=on" : "", 590 left, phost, right, pserv); 591 592 default: 593 return g_strdup_printf("unknown"); 594 } 595 } 596 597 static void update_ioc_handlers(SocketChardev *s) 598 { 599 Chardev *chr = CHARDEV(s); 600 601 if (s->state != TCP_CHARDEV_STATE_CONNECTED) { 602 return; 603 } 604 605 remove_fd_in_watch(chr); 606 chr->gsource = io_add_watch_poll(chr, s->ioc, 607 tcp_chr_read_poll, 608 tcp_chr_read, chr, 609 chr->gcontext); 610 611 remove_hup_source(s); 612 s->hup_source = qio_channel_create_watch(s->ioc, G_IO_HUP); 613 /* 614 * poll() is liable to return POLLHUP even when there is 615 * still incoming data available to read on the FD. If 616 * we have the hup_source at the same priority as the 617 * main io_add_watch_poll GSource, then we might end up 618 * processing the POLLHUP event first, closing the FD, 619 * and as a result silently discard data we should have 620 * read. 621 * 622 * By setting the hup_source to G_PRIORITY_DEFAULT + 1, 623 * we ensure that io_add_watch_poll GSource will always 624 * be dispatched first, thus guaranteeing we will be 625 * able to process all incoming data before closing the 626 * FD 627 */ 628 g_source_set_priority(s->hup_source, G_PRIORITY_DEFAULT + 1); 629 g_source_set_callback(s->hup_source, (GSourceFunc)tcp_chr_hup, 630 chr, NULL); 631 g_source_attach(s->hup_source, chr->gcontext); 632 } 633 634 static void tcp_chr_connect(void *opaque) 635 { 636 Chardev *chr = CHARDEV(opaque); 637 SocketChardev *s = SOCKET_CHARDEV(opaque); 638 639 g_free(chr->filename); 640 chr->filename = qemu_chr_compute_filename(s); 641 642 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTED); 643 update_ioc_handlers(s); 644 qemu_chr_be_event(chr, CHR_EVENT_OPENED); 645 } 646 647 static void tcp_chr_telnet_destroy(SocketChardev *s) 648 { 649 if (s->telnet_source) { 650 g_source_destroy(s->telnet_source); 651 g_source_unref(s->telnet_source); 652 s->telnet_source = NULL; 653 } 654 } 655 656 static void tcp_chr_update_read_handler(Chardev *chr) 657 { 658 SocketChardev *s = SOCKET_CHARDEV(chr); 659 660 if (s->listener && s->state == TCP_CHARDEV_STATE_DISCONNECTED) { 661 /* 662 * It's possible that chardev context is changed in 663 * qemu_chr_be_update_read_handlers(). Reset it for QIO net 664 * listener if there is. 665 */ 666 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept, 667 chr, NULL, chr->gcontext); 668 } 669 670 if (s->telnet_source) { 671 tcp_chr_telnet_init(CHARDEV(s)); 672 } 673 674 update_ioc_handlers(s); 675 } 676 677 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, 678 GIOCondition cond G_GNUC_UNUSED, 679 gpointer user_data) 680 { 681 SocketChardev *s = user_data; 682 Chardev *chr = CHARDEV(s); 683 TCPChardevTelnetInit *init = s->telnet_init; 684 Error *err = NULL; 685 ssize_t ret; 686 687 assert(init); 688 689 ret = qio_channel_write(ioc, init->buf, init->buflen, &err); 690 if (ret < 0) { 691 if (ret == QIO_CHANNEL_ERR_BLOCK) { 692 ret = 0; 693 } else { 694 trace_chr_socket_write_err(chr, chr->label, error_get_pretty(err)); 695 error_free(err); 696 tcp_chr_disconnect(chr); 697 goto end; 698 } 699 } 700 init->buflen -= ret; 701 702 if (init->buflen == 0) { 703 tcp_chr_connect(chr); 704 goto end; 705 } 706 707 memmove(init->buf, init->buf + ret, init->buflen); 708 709 return G_SOURCE_CONTINUE; 710 711 end: 712 g_free(s->telnet_init); 713 s->telnet_init = NULL; 714 g_source_unref(s->telnet_source); 715 s->telnet_source = NULL; 716 return G_SOURCE_REMOVE; 717 } 718 719 static void tcp_chr_telnet_init(Chardev *chr) 720 { 721 SocketChardev *s = SOCKET_CHARDEV(chr); 722 TCPChardevTelnetInit *init; 723 size_t n = 0; 724 725 /* Destroy existing task */ 726 tcp_chr_telnet_destroy(s); 727 728 if (s->telnet_init) { 729 /* We are possibly during a handshake already */ 730 goto cont; 731 } 732 733 s->telnet_init = g_new0(TCPChardevTelnetInit, 1); 734 init = s->telnet_init; 735 736 #define IACSET(x, a, b, c) \ 737 do { \ 738 x[n++] = a; \ 739 x[n++] = b; \ 740 x[n++] = c; \ 741 } while (0) 742 743 if (!s->is_tn3270) { 744 init->buflen = 12; 745 /* Prep the telnet negotiation to put telnet in binary, 746 * no echo, single char mode */ 747 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ 748 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ 749 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ 750 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ 751 } else { 752 init->buflen = 21; 753 /* Prep the TN3270 negotiation based on RFC1576 */ 754 IACSET(init->buf, 0xff, 0xfd, 0x19); /* IAC DO EOR */ 755 IACSET(init->buf, 0xff, 0xfb, 0x19); /* IAC WILL EOR */ 756 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO BINARY */ 757 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL BINARY */ 758 IACSET(init->buf, 0xff, 0xfd, 0x18); /* IAC DO TERMINAL TYPE */ 759 IACSET(init->buf, 0xff, 0xfa, 0x18); /* IAC SB TERMINAL TYPE */ 760 IACSET(init->buf, 0x01, 0xff, 0xf0); /* SEND IAC SE */ 761 } 762 763 #undef IACSET 764 765 cont: 766 s->telnet_source = qio_channel_add_watch_source(s->ioc, G_IO_OUT, 767 tcp_chr_telnet_init_io, 768 s, NULL, 769 chr->gcontext); 770 } 771 772 773 static void tcp_chr_websock_handshake(QIOTask *task, gpointer user_data) 774 { 775 Chardev *chr = user_data; 776 SocketChardev *s = user_data; 777 Error *err = NULL; 778 779 if (qio_task_propagate_error(task, &err)) { 780 trace_chr_socket_ws_handshake_err(chr, chr->label, 781 error_get_pretty(err)); 782 error_free(err); 783 tcp_chr_disconnect(chr); 784 } else { 785 if (s->do_telnetopt) { 786 tcp_chr_telnet_init(chr); 787 } else { 788 tcp_chr_connect(chr); 789 } 790 } 791 } 792 793 794 static void tcp_chr_websock_init(Chardev *chr) 795 { 796 SocketChardev *s = SOCKET_CHARDEV(chr); 797 QIOChannelWebsock *wioc = NULL; 798 gchar *name; 799 800 wioc = qio_channel_websock_new_server(s->ioc); 801 802 name = g_strdup_printf("chardev-websocket-server-%s", chr->label); 803 qio_channel_set_name(QIO_CHANNEL(wioc), name); 804 g_free(name); 805 object_unref(OBJECT(s->ioc)); 806 s->ioc = QIO_CHANNEL(wioc); 807 808 qio_channel_websock_handshake(wioc, tcp_chr_websock_handshake, chr, NULL); 809 } 810 811 812 static void tcp_chr_tls_handshake(QIOTask *task, 813 gpointer user_data) 814 { 815 Chardev *chr = user_data; 816 SocketChardev *s = user_data; 817 Error *err = NULL; 818 819 if (qio_task_propagate_error(task, &err)) { 820 trace_chr_socket_tls_handshake_err(chr, chr->label, 821 error_get_pretty(err)); 822 error_free(err); 823 tcp_chr_disconnect(chr); 824 } else { 825 if (s->is_websock) { 826 tcp_chr_websock_init(chr); 827 } else if (s->do_telnetopt) { 828 tcp_chr_telnet_init(chr); 829 } else { 830 tcp_chr_connect(chr); 831 } 832 } 833 } 834 835 836 static void tcp_chr_tls_init(Chardev *chr) 837 { 838 SocketChardev *s = SOCKET_CHARDEV(chr); 839 QIOChannelTLS *tioc; 840 gchar *name; 841 Error *err = NULL; 842 843 if (s->is_listen) { 844 tioc = qio_channel_tls_new_server( 845 s->ioc, s->tls_creds, 846 s->tls_authz, 847 &err); 848 } else { 849 tioc = qio_channel_tls_new_client( 850 s->ioc, s->tls_creds, 851 s->addr->u.inet.host, 852 &err); 853 } 854 if (tioc == NULL) { 855 trace_chr_socket_tls_init_err(chr, chr->label, error_get_pretty(err)); 856 error_free(err); 857 tcp_chr_disconnect(chr); 858 return; 859 } 860 name = g_strdup_printf("chardev-tls-%s-%s", 861 s->is_listen ? "server" : "client", 862 chr->label); 863 qio_channel_set_name(QIO_CHANNEL(tioc), name); 864 g_free(name); 865 object_unref(OBJECT(s->ioc)); 866 s->ioc = QIO_CHANNEL(tioc); 867 868 qio_channel_tls_handshake(tioc, 869 tcp_chr_tls_handshake, 870 chr, 871 NULL, 872 chr->gcontext); 873 } 874 875 876 static void tcp_chr_set_client_ioc_name(Chardev *chr, 877 QIOChannelSocket *sioc) 878 { 879 SocketChardev *s = SOCKET_CHARDEV(chr); 880 char *name; 881 name = g_strdup_printf("chardev-tcp-%s-%s", 882 s->is_listen ? "server" : "client", 883 chr->label); 884 qio_channel_set_name(QIO_CHANNEL(sioc), name); 885 g_free(name); 886 887 } 888 889 static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc) 890 { 891 SocketChardev *s = SOCKET_CHARDEV(chr); 892 893 if (s->state != TCP_CHARDEV_STATE_CONNECTING) { 894 return -1; 895 } 896 897 s->ioc = QIO_CHANNEL(sioc); 898 object_ref(OBJECT(sioc)); 899 s->sioc = sioc; 900 object_ref(OBJECT(sioc)); 901 902 qio_channel_set_blocking(s->ioc, false, NULL); 903 904 if (s->do_nodelay) { 905 qio_channel_set_delay(s->ioc, false); 906 } 907 if (s->listener) { 908 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 909 NULL, chr->gcontext); 910 } 911 912 if (s->tls_creds) { 913 tcp_chr_tls_init(chr); 914 } else if (s->is_websock) { 915 tcp_chr_websock_init(chr); 916 } else if (s->do_telnetopt) { 917 tcp_chr_telnet_init(chr); 918 } else { 919 tcp_chr_connect(chr); 920 } 921 922 return 0; 923 } 924 925 926 static int tcp_chr_add_client(Chardev *chr, int fd) 927 { 928 int ret; 929 QIOChannelSocket *sioc; 930 SocketChardev *s = SOCKET_CHARDEV(chr); 931 932 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) { 933 return -1; 934 } 935 936 sioc = qio_channel_socket_new_fd(fd, NULL); 937 if (!sioc) { 938 return -1; 939 } 940 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 941 tcp_chr_set_client_ioc_name(chr, sioc); 942 if (s->registered_yank) { 943 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 944 char_socket_yank_iochannel, 945 QIO_CHANNEL(sioc)); 946 } 947 ret = tcp_chr_new_client(chr, sioc); 948 object_unref(OBJECT(sioc)); 949 return ret; 950 } 951 952 static void tcp_chr_accept(QIONetListener *listener, 953 QIOChannelSocket *cioc, 954 void *opaque) 955 { 956 Chardev *chr = CHARDEV(opaque); 957 SocketChardev *s = SOCKET_CHARDEV(chr); 958 959 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 960 tcp_chr_set_client_ioc_name(chr, cioc); 961 if (s->registered_yank) { 962 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 963 char_socket_yank_iochannel, 964 QIO_CHANNEL(cioc)); 965 } 966 tcp_chr_new_client(chr, cioc); 967 } 968 969 970 static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp) 971 { 972 SocketChardev *s = SOCKET_CHARDEV(chr); 973 QIOChannelSocket *sioc = qio_channel_socket_new(); 974 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 975 tcp_chr_set_client_ioc_name(chr, sioc); 976 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) { 977 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 978 object_unref(OBJECT(sioc)); 979 return -1; 980 } 981 if (s->registered_yank) { 982 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 983 char_socket_yank_iochannel, 984 QIO_CHANNEL(sioc)); 985 } 986 tcp_chr_new_client(chr, sioc); 987 object_unref(OBJECT(sioc)); 988 return 0; 989 } 990 991 992 static void tcp_chr_accept_server_sync(Chardev *chr) 993 { 994 SocketChardev *s = SOCKET_CHARDEV(chr); 995 QIOChannelSocket *sioc; 996 info_report("QEMU waiting for connection on: %s", 997 chr->filename); 998 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 999 sioc = qio_net_listener_wait_client(s->listener); 1000 tcp_chr_set_client_ioc_name(chr, sioc); 1001 if (s->registered_yank) { 1002 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 1003 char_socket_yank_iochannel, 1004 QIO_CHANNEL(sioc)); 1005 } 1006 tcp_chr_new_client(chr, sioc); 1007 object_unref(OBJECT(sioc)); 1008 } 1009 1010 1011 static int tcp_chr_wait_connected(Chardev *chr, Error **errp) 1012 { 1013 SocketChardev *s = SOCKET_CHARDEV(chr); 1014 const char *opts[] = { "telnet", "tn3270", "websock", "tls-creds" }; 1015 bool optset[] = { s->is_telnet, s->is_tn3270, s->is_websock, s->tls_creds }; 1016 size_t i; 1017 1018 QEMU_BUILD_BUG_ON(G_N_ELEMENTS(opts) != G_N_ELEMENTS(optset)); 1019 for (i = 0; i < G_N_ELEMENTS(opts); i++) { 1020 if (optset[i]) { 1021 error_setg(errp, 1022 "'%s' option is incompatible with waiting for " 1023 "connection completion", opts[i]); 1024 return -1; 1025 } 1026 } 1027 1028 tcp_chr_reconn_timer_cancel(s); 1029 1030 /* 1031 * We expect states to be as follows: 1032 * 1033 * - server 1034 * - wait -> CONNECTED 1035 * - nowait -> DISCONNECTED 1036 * - client 1037 * - reconnect == 0 -> CONNECTED 1038 * - reconnect != 0 -> CONNECTING 1039 * 1040 */ 1041 if (s->state == TCP_CHARDEV_STATE_CONNECTING) { 1042 if (!s->connect_task) { 1043 error_setg(errp, 1044 "Unexpected 'connecting' state without connect task " 1045 "while waiting for connection completion"); 1046 return -1; 1047 } 1048 /* 1049 * tcp_chr_wait_connected should only ever be run from the 1050 * main loop thread associated with chr->gcontext, otherwise 1051 * qio_task_wait_thread has a dangerous race condition with 1052 * free'ing of the s->connect_task object. 1053 * 1054 * Acquiring the main context doesn't 100% prove we're in 1055 * the main loop thread, but it does at least guarantee 1056 * that the main loop won't be executed by another thread 1057 * avoiding the race condition with the task idle callback. 1058 */ 1059 g_main_context_acquire(chr->gcontext); 1060 qio_task_wait_thread(s->connect_task); 1061 g_main_context_release(chr->gcontext); 1062 1063 /* 1064 * The completion callback (qemu_chr_socket_connected) for 1065 * s->connect_task should have set this to NULL by the time 1066 * qio_task_wait_thread has returned. 1067 */ 1068 assert(!s->connect_task); 1069 1070 /* 1071 * NB we are *not* guaranteed to have "s->state == ..CONNECTED" 1072 * at this point as this first connect may be failed, so 1073 * allow the next loop to run regardless. 1074 */ 1075 } 1076 1077 while (s->state != TCP_CHARDEV_STATE_CONNECTED) { 1078 if (s->is_listen) { 1079 tcp_chr_accept_server_sync(chr); 1080 } else { 1081 Error *err = NULL; 1082 if (tcp_chr_connect_client_sync(chr, &err) < 0) { 1083 if (s->reconnect_time) { 1084 error_free(err); 1085 g_usleep(s->reconnect_time * 1000ULL * 1000ULL); 1086 } else { 1087 error_propagate(errp, err); 1088 return -1; 1089 } 1090 } 1091 } 1092 } 1093 1094 return 0; 1095 } 1096 1097 static void char_socket_finalize(Object *obj) 1098 { 1099 Chardev *chr = CHARDEV(obj); 1100 SocketChardev *s = SOCKET_CHARDEV(obj); 1101 1102 tcp_chr_free_connection(chr); 1103 tcp_chr_reconn_timer_cancel(s); 1104 qapi_free_SocketAddress(s->addr); 1105 tcp_chr_telnet_destroy(s); 1106 g_free(s->telnet_init); 1107 if (s->listener) { 1108 qio_net_listener_set_client_func_full(s->listener, NULL, NULL, 1109 NULL, chr->gcontext); 1110 object_unref(OBJECT(s->listener)); 1111 s->listener = NULL; 1112 } 1113 if (s->tls_creds) { 1114 object_unref(OBJECT(s->tls_creds)); 1115 } 1116 g_free(s->tls_authz); 1117 if (s->registered_yank) { 1118 /* 1119 * In the chardev-change special-case, we shouldn't unregister the yank 1120 * instance, as it still may be needed. 1121 */ 1122 if (!chr->handover_yank_instance) { 1123 yank_unregister_instance(CHARDEV_YANK_INSTANCE(chr->label)); 1124 } 1125 } 1126 1127 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 1128 } 1129 1130 static void qemu_chr_socket_connected(QIOTask *task, void *opaque) 1131 { 1132 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1133 Chardev *chr = CHARDEV(opaque); 1134 SocketChardev *s = SOCKET_CHARDEV(chr); 1135 Error *err = NULL; 1136 1137 s->connect_task = NULL; 1138 1139 if (qio_task_propagate_error(task, &err)) { 1140 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED); 1141 if (s->registered_yank) { 1142 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label), 1143 char_socket_yank_iochannel, 1144 QIO_CHANNEL(sioc)); 1145 } 1146 check_report_connect_error(chr, err); 1147 goto cleanup; 1148 } 1149 1150 s->connect_err_reported = false; 1151 tcp_chr_new_client(chr, sioc); 1152 1153 cleanup: 1154 object_unref(OBJECT(sioc)); 1155 } 1156 1157 1158 static void tcp_chr_connect_client_task(QIOTask *task, 1159 gpointer opaque) 1160 { 1161 QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 1162 SocketAddress *addr = opaque; 1163 Error *err = NULL; 1164 1165 qio_channel_socket_connect_sync(ioc, addr, &err); 1166 1167 qio_task_set_error(task, err); 1168 } 1169 1170 1171 static void tcp_chr_connect_client_async(Chardev *chr) 1172 { 1173 SocketChardev *s = SOCKET_CHARDEV(chr); 1174 QIOChannelSocket *sioc; 1175 1176 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING); 1177 sioc = qio_channel_socket_new(); 1178 tcp_chr_set_client_ioc_name(chr, sioc); 1179 if (s->registered_yank) { 1180 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label), 1181 char_socket_yank_iochannel, 1182 QIO_CHANNEL(sioc)); 1183 } 1184 /* 1185 * Normally code would use the qio_channel_socket_connect_async 1186 * method which uses a QIOTask + qio_task_set_error internally 1187 * to avoid blocking. The tcp_chr_wait_connected method, however, 1188 * needs a way to synchronize with completion of the background 1189 * connect task which can't be done with the QIOChannelSocket 1190 * async APIs. Thus we must use QIOTask directly to implement 1191 * the non-blocking concept locally. 1192 */ 1193 s->connect_task = qio_task_new(OBJECT(sioc), 1194 qemu_chr_socket_connected, 1195 object_ref(OBJECT(chr)), 1196 (GDestroyNotify)object_unref); 1197 qio_task_run_in_thread(s->connect_task, 1198 tcp_chr_connect_client_task, 1199 s->addr, 1200 NULL, 1201 chr->gcontext); 1202 } 1203 1204 static gboolean socket_reconnect_timeout(gpointer opaque) 1205 { 1206 Chardev *chr = CHARDEV(opaque); 1207 SocketChardev *s = SOCKET_CHARDEV(opaque); 1208 1209 qemu_mutex_lock(&chr->chr_write_lock); 1210 g_source_unref(s->reconnect_timer); 1211 s->reconnect_timer = NULL; 1212 qemu_mutex_unlock(&chr->chr_write_lock); 1213 1214 if (chr->be_open) { 1215 return false; 1216 } 1217 1218 tcp_chr_connect_client_async(chr); 1219 1220 return false; 1221 } 1222 1223 1224 static int qmp_chardev_open_socket_server(Chardev *chr, 1225 bool is_telnet, 1226 bool is_waitconnect, 1227 Error **errp) 1228 { 1229 SocketChardev *s = SOCKET_CHARDEV(chr); 1230 char *name; 1231 if (is_telnet) { 1232 s->do_telnetopt = 1; 1233 } 1234 s->listener = qio_net_listener_new(); 1235 1236 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label); 1237 qio_net_listener_set_name(s->listener, name); 1238 g_free(name); 1239 1240 if (s->addr->type == SOCKET_ADDRESS_TYPE_FD && !*s->addr->u.fd.str) { 1241 goto skip_listen; 1242 } 1243 1244 if (qio_net_listener_open_sync(s->listener, s->addr, 1, errp) < 0) { 1245 object_unref(OBJECT(s->listener)); 1246 s->listener = NULL; 1247 return -1; 1248 } 1249 1250 qapi_free_SocketAddress(s->addr); 1251 s->addr = socket_local_address(s->listener->sioc[0]->fd, errp); 1252 1253 skip_listen: 1254 update_disconnected_filename(s); 1255 1256 if (is_waitconnect) { 1257 tcp_chr_accept_server_sync(chr); 1258 } else { 1259 qio_net_listener_set_client_func_full(s->listener, 1260 tcp_chr_accept, 1261 chr, NULL, 1262 chr->gcontext); 1263 } 1264 1265 return 0; 1266 } 1267 1268 1269 static int qmp_chardev_open_socket_client(Chardev *chr, 1270 int64_t reconnect, 1271 Error **errp) 1272 { 1273 SocketChardev *s = SOCKET_CHARDEV(chr); 1274 1275 if (reconnect > 0) { 1276 s->reconnect_time = reconnect; 1277 tcp_chr_connect_client_async(chr); 1278 return 0; 1279 } else { 1280 return tcp_chr_connect_client_sync(chr, errp); 1281 } 1282 } 1283 1284 1285 static bool qmp_chardev_validate_socket(ChardevSocket *sock, 1286 SocketAddress *addr, 1287 Error **errp) 1288 { 1289 /* Validate any options which have a dependency on address type */ 1290 switch (addr->type) { 1291 case SOCKET_ADDRESS_TYPE_FD: 1292 if (sock->has_reconnect) { 1293 error_setg(errp, 1294 "'reconnect' option is incompatible with " 1295 "'fd' address type"); 1296 return false; 1297 } 1298 if (sock->tls_creds && 1299 !(sock->has_server && sock->server)) { 1300 error_setg(errp, 1301 "'tls_creds' option is incompatible with " 1302 "'fd' address type as client"); 1303 return false; 1304 } 1305 break; 1306 1307 case SOCKET_ADDRESS_TYPE_UNIX: 1308 if (sock->tls_creds) { 1309 error_setg(errp, 1310 "'tls_creds' option is incompatible with " 1311 "'unix' address type"); 1312 return false; 1313 } 1314 break; 1315 1316 case SOCKET_ADDRESS_TYPE_INET: 1317 break; 1318 1319 case SOCKET_ADDRESS_TYPE_VSOCK: 1320 if (sock->tls_creds) { 1321 error_setg(errp, 1322 "'tls_creds' option is incompatible with " 1323 "'vsock' address type"); 1324 return false; 1325 } 1326 1327 default: 1328 break; 1329 } 1330 1331 if (sock->tls_authz && !sock->tls_creds) { 1332 error_setg(errp, "'tls_authz' option requires 'tls_creds' option"); 1333 return false; 1334 } 1335 1336 /* Validate any options which have a dependency on client vs server */ 1337 if (!sock->has_server || sock->server) { 1338 if (sock->has_reconnect) { 1339 error_setg(errp, 1340 "'reconnect' option is incompatible with " 1341 "socket in server listen mode"); 1342 return false; 1343 } 1344 } else { 1345 if (sock->has_websocket && sock->websocket) { 1346 error_setg(errp, "%s", "Websocket client is not implemented"); 1347 return false; 1348 } 1349 if (sock->has_wait) { 1350 error_setg(errp, "%s", 1351 "'wait' option is incompatible with " 1352 "socket in client connect mode"); 1353 return false; 1354 } 1355 } 1356 1357 return true; 1358 } 1359 1360 1361 static void qmp_chardev_open_socket(Chardev *chr, 1362 ChardevBackend *backend, 1363 bool *be_opened, 1364 Error **errp) 1365 { 1366 SocketChardev *s = SOCKET_CHARDEV(chr); 1367 ChardevSocket *sock = backend->u.socket.data; 1368 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false; 1369 bool is_listen = sock->has_server ? sock->server : true; 1370 bool is_telnet = sock->has_telnet ? sock->telnet : false; 1371 bool is_tn3270 = sock->has_tn3270 ? sock->tn3270 : false; 1372 bool is_waitconnect = sock->has_wait ? sock->wait : false; 1373 bool is_websock = sock->has_websocket ? sock->websocket : false; 1374 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; 1375 SocketAddress *addr; 1376 1377 s->is_listen = is_listen; 1378 s->is_telnet = is_telnet; 1379 s->is_tn3270 = is_tn3270; 1380 s->is_websock = is_websock; 1381 s->do_nodelay = do_nodelay; 1382 if (sock->tls_creds) { 1383 Object *creds; 1384 creds = object_resolve_path_component( 1385 object_get_objects_root(), sock->tls_creds); 1386 if (!creds) { 1387 error_setg(errp, "No TLS credentials with id '%s'", 1388 sock->tls_creds); 1389 return; 1390 } 1391 s->tls_creds = (QCryptoTLSCreds *) 1392 object_dynamic_cast(creds, 1393 TYPE_QCRYPTO_TLS_CREDS); 1394 if (!s->tls_creds) { 1395 error_setg(errp, "Object with id '%s' is not TLS credentials", 1396 sock->tls_creds); 1397 return; 1398 } 1399 object_ref(OBJECT(s->tls_creds)); 1400 if (!qcrypto_tls_creds_check_endpoint(s->tls_creds, 1401 is_listen 1402 ? QCRYPTO_TLS_CREDS_ENDPOINT_SERVER 1403 : QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT, 1404 errp)) { 1405 return; 1406 } 1407 } 1408 s->tls_authz = g_strdup(sock->tls_authz); 1409 1410 s->addr = addr = socket_address_flatten(sock->addr); 1411 1412 if (!qmp_chardev_validate_socket(sock, addr, errp)) { 1413 return; 1414 } 1415 1416 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); 1417 #ifndef _WIN32 1418 /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */ 1419 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) { 1420 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); 1421 } 1422 #endif 1423 1424 /* 1425 * In the chardev-change special-case, we shouldn't register a new yank 1426 * instance, as there already may be one. 1427 */ 1428 if (!chr->handover_yank_instance) { 1429 if (!yank_register_instance(CHARDEV_YANK_INSTANCE(chr->label), errp)) { 1430 return; 1431 } 1432 } 1433 s->registered_yank = true; 1434 1435 /* be isn't opened until we get a connection */ 1436 *be_opened = false; 1437 1438 update_disconnected_filename(s); 1439 1440 if (s->is_listen) { 1441 if (qmp_chardev_open_socket_server(chr, is_telnet || is_tn3270, 1442 is_waitconnect, errp) < 0) { 1443 return; 1444 } 1445 } else { 1446 if (qmp_chardev_open_socket_client(chr, reconnect, errp) < 0) { 1447 return; 1448 } 1449 } 1450 } 1451 1452 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend, 1453 Error **errp) 1454 { 1455 const char *path = qemu_opt_get(opts, "path"); 1456 const char *host = qemu_opt_get(opts, "host"); 1457 const char *port = qemu_opt_get(opts, "port"); 1458 const char *fd = qemu_opt_get(opts, "fd"); 1459 #ifdef CONFIG_LINUX 1460 bool tight = qemu_opt_get_bool(opts, "tight", true); 1461 bool abstract = qemu_opt_get_bool(opts, "abstract", false); 1462 #endif 1463 SocketAddressLegacy *addr; 1464 ChardevSocket *sock; 1465 1466 if ((!!path + !!fd + !!host) > 1) { 1467 error_setg(errp, 1468 "None or one of 'path', 'fd' or 'host' option required."); 1469 return; 1470 } 1471 1472 if (host && !port) { 1473 error_setg(errp, "chardev: socket: no port given"); 1474 return; 1475 } 1476 1477 backend->type = CHARDEV_BACKEND_KIND_SOCKET; 1478 sock = backend->u.socket.data = g_new0(ChardevSocket, 1); 1479 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock)); 1480 1481 if (qemu_opt_get(opts, "delay") && qemu_opt_get(opts, "nodelay")) { 1482 error_setg(errp, "'delay' and 'nodelay' are mutually exclusive"); 1483 return; 1484 } 1485 sock->has_nodelay = 1486 qemu_opt_get(opts, "delay") || 1487 qemu_opt_get(opts, "nodelay"); 1488 sock->nodelay = 1489 !qemu_opt_get_bool(opts, "delay", true) || 1490 qemu_opt_get_bool(opts, "nodelay", false); 1491 1492 /* 1493 * We have different default to QMP for 'server', hence 1494 * we can't just check for existence of 'server' 1495 */ 1496 sock->has_server = true; 1497 sock->server = qemu_opt_get_bool(opts, "server", false); 1498 sock->has_telnet = qemu_opt_get(opts, "telnet"); 1499 sock->telnet = qemu_opt_get_bool(opts, "telnet", false); 1500 sock->has_tn3270 = qemu_opt_get(opts, "tn3270"); 1501 sock->tn3270 = qemu_opt_get_bool(opts, "tn3270", false); 1502 sock->has_websocket = qemu_opt_get(opts, "websocket"); 1503 sock->websocket = qemu_opt_get_bool(opts, "websocket", false); 1504 /* 1505 * We have different default to QMP for 'wait' when 'server' 1506 * is set, hence we can't just check for existence of 'wait' 1507 */ 1508 sock->has_wait = qemu_opt_find(opts, "wait") || sock->server; 1509 sock->wait = qemu_opt_get_bool(opts, "wait", true); 1510 sock->has_reconnect = qemu_opt_find(opts, "reconnect"); 1511 sock->reconnect = qemu_opt_get_number(opts, "reconnect", 0); 1512 sock->tls_creds = g_strdup(qemu_opt_get(opts, "tls-creds")); 1513 sock->tls_authz = g_strdup(qemu_opt_get(opts, "tls-authz")); 1514 1515 addr = g_new0(SocketAddressLegacy, 1); 1516 if (path) { 1517 UnixSocketAddress *q_unix; 1518 addr->type = SOCKET_ADDRESS_TYPE_UNIX; 1519 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 1520 q_unix->path = g_strdup(path); 1521 #ifdef CONFIG_LINUX 1522 q_unix->has_tight = true; 1523 q_unix->tight = tight; 1524 q_unix->has_abstract = true; 1525 q_unix->abstract = abstract; 1526 #endif 1527 } else if (host) { 1528 addr->type = SOCKET_ADDRESS_TYPE_INET; 1529 addr->u.inet.data = g_new(InetSocketAddress, 1); 1530 *addr->u.inet.data = (InetSocketAddress) { 1531 .host = g_strdup(host), 1532 .port = g_strdup(port), 1533 .has_to = qemu_opt_get(opts, "to"), 1534 .to = qemu_opt_get_number(opts, "to", 0), 1535 .has_ipv4 = qemu_opt_get(opts, "ipv4"), 1536 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), 1537 .has_ipv6 = qemu_opt_get(opts, "ipv6"), 1538 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), 1539 }; 1540 } else { 1541 addr->type = SOCKET_ADDRESS_TYPE_FD; 1542 addr->u.fd.data = g_new(FdSocketAddress, 1); 1543 addr->u.fd.data->str = g_strdup(fd); 1544 } 1545 sock->addr = addr; 1546 } 1547 1548 static void 1549 char_socket_get_addr(Object *obj, Visitor *v, const char *name, 1550 void *opaque, Error **errp) 1551 { 1552 SocketChardev *s = SOCKET_CHARDEV(obj); 1553 1554 visit_type_SocketAddress(v, name, &s->addr, errp); 1555 } 1556 1557 static bool 1558 char_socket_get_connected(Object *obj, Error **errp) 1559 { 1560 SocketChardev *s = SOCKET_CHARDEV(obj); 1561 1562 return s->state == TCP_CHARDEV_STATE_CONNECTED; 1563 } 1564 1565 static void char_socket_class_init(ObjectClass *oc, void *data) 1566 { 1567 ChardevClass *cc = CHARDEV_CLASS(oc); 1568 1569 cc->supports_yank = true; 1570 1571 cc->parse = qemu_chr_parse_socket; 1572 cc->open = qmp_chardev_open_socket; 1573 cc->chr_wait_connected = tcp_chr_wait_connected; 1574 cc->chr_write = tcp_chr_write; 1575 cc->chr_sync_read = tcp_chr_sync_read; 1576 cc->chr_disconnect = tcp_chr_disconnect; 1577 cc->get_msgfds = tcp_get_msgfds; 1578 cc->set_msgfds = tcp_set_msgfds; 1579 cc->chr_add_client = tcp_chr_add_client; 1580 cc->chr_add_watch = tcp_chr_add_watch; 1581 cc->chr_update_read_handler = tcp_chr_update_read_handler; 1582 1583 object_class_property_add(oc, "addr", "SocketAddress", 1584 char_socket_get_addr, NULL, 1585 NULL, NULL); 1586 1587 object_class_property_add_bool(oc, "connected", char_socket_get_connected, 1588 NULL); 1589 } 1590 1591 static const TypeInfo char_socket_type_info = { 1592 .name = TYPE_CHARDEV_SOCKET, 1593 .parent = TYPE_CHARDEV, 1594 .instance_size = sizeof(SocketChardev), 1595 .instance_finalize = char_socket_finalize, 1596 .class_init = char_socket_class_init, 1597 }; 1598 1599 static void register_types(void) 1600 { 1601 type_register_static(&char_socket_type_info); 1602 } 1603 1604 type_init(register_types); 1605