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 "chardev/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 "chardev/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 *read_msgfds; 51 size_t read_msgfds_num; 52 int *write_msgfds; 53 size_t write_msgfds_num; 54 55 SocketAddress *addr; 56 bool is_listen; 57 bool is_telnet; 58 bool is_tn3270; 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 static int tcp_chr_read_poll(void *opaque); 101 static void tcp_chr_disconnect(Chardev *chr); 102 103 /* Called with chr_write_lock held. */ 104 static int tcp_chr_write(Chardev *chr, const uint8_t *buf, int len) 105 { 106 SocketChardev *s = SOCKET_CHARDEV(chr); 107 108 if (s->connected) { 109 int ret = io_channel_send_full(s->ioc, buf, len, 110 s->write_msgfds, 111 s->write_msgfds_num); 112 113 /* free the written msgfds, no matter what */ 114 if (s->write_msgfds_num) { 115 g_free(s->write_msgfds); 116 s->write_msgfds = 0; 117 s->write_msgfds_num = 0; 118 } 119 120 if (ret < 0 && errno != EAGAIN) { 121 if (tcp_chr_read_poll(chr) <= 0) { 122 tcp_chr_disconnect(chr); 123 return len; 124 } /* else let the read handler finish it properly */ 125 } 126 127 return ret; 128 } else { 129 /* XXX: indicate an error ? */ 130 return len; 131 } 132 } 133 134 static int tcp_chr_read_poll(void *opaque) 135 { 136 Chardev *chr = CHARDEV(opaque); 137 SocketChardev *s = SOCKET_CHARDEV(opaque); 138 if (!s->connected) { 139 return 0; 140 } 141 s->max_size = qemu_chr_be_can_write(chr); 142 return s->max_size; 143 } 144 145 static void tcp_chr_process_IAC_bytes(Chardev *chr, 146 SocketChardev *s, 147 uint8_t *buf, int *size) 148 { 149 /* Handle any telnet or tn3270 client's basic IAC options. 150 * For telnet options, it satisfies char by char mode with no echo. 151 * For tn3270 options, it satisfies binary mode with EOR. 152 * All IAC options will be removed from the buf and the do_opt 153 * pointer will be used to track the state of the width of the 154 * IAC information. 155 * 156 * RFC854: "All TELNET commands consist of at least a two byte sequence. 157 * The commands dealing with option negotiation are three byte sequences, 158 * the third byte being the code for the option referenced." 159 * "IAC BREAK", "IAC IP", "IAC NOP" and the double IAC are two bytes. 160 * "IAC SB", "IAC SE" and "IAC EOR" are saved to split up data boundary 161 * for tn3270. 162 * NOP, Break and Interrupt Process(IP) might be encountered during a TN3270 163 * session, and NOP and IP need to be done later. 164 */ 165 166 int i; 167 int j = 0; 168 169 for (i = 0; i < *size; i++) { 170 if (s->do_telnetopt > 1) { 171 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) { 172 /* Double IAC means send an IAC */ 173 if (j != i) { 174 buf[j] = buf[i]; 175 } 176 j++; 177 s->do_telnetopt = 1; 178 } else { 179 if ((unsigned char)buf[i] == IAC_BREAK 180 && s->do_telnetopt == 2) { 181 /* Handle IAC break commands by sending a serial break */ 182 qemu_chr_be_event(chr, CHR_EVENT_BREAK); 183 s->do_telnetopt++; 184 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_EOR 185 || (unsigned char)buf[i] == IAC_SB 186 || (unsigned char)buf[i] == IAC_SE) 187 && s->do_telnetopt == 2) { 188 buf[j++] = IAC; 189 buf[j++] = buf[i]; 190 s->do_telnetopt++; 191 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_IP 192 || (unsigned char)buf[i] == IAC_NOP) 193 && s->do_telnetopt == 2) { 194 /* TODO: IP and NOP need to be implemented later. */ 195 s->do_telnetopt++; 196 } 197 s->do_telnetopt++; 198 } 199 if (s->do_telnetopt >= 4) { 200 s->do_telnetopt = 1; 201 } 202 } else { 203 if ((unsigned char)buf[i] == IAC) { 204 s->do_telnetopt = 2; 205 } else { 206 if (j != i) { 207 buf[j] = buf[i]; 208 } 209 j++; 210 } 211 } 212 } 213 *size = j; 214 } 215 216 static int tcp_get_msgfds(Chardev *chr, int *fds, int num) 217 { 218 SocketChardev *s = SOCKET_CHARDEV(chr); 219 220 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num; 221 222 assert(num <= TCP_MAX_FDS); 223 224 if (to_copy) { 225 int i; 226 227 memcpy(fds, s->read_msgfds, to_copy * sizeof(int)); 228 229 /* Close unused fds */ 230 for (i = to_copy; i < s->read_msgfds_num; i++) { 231 close(s->read_msgfds[i]); 232 } 233 234 g_free(s->read_msgfds); 235 s->read_msgfds = 0; 236 s->read_msgfds_num = 0; 237 } 238 239 return to_copy; 240 } 241 242 static int tcp_set_msgfds(Chardev *chr, int *fds, int num) 243 { 244 SocketChardev *s = SOCKET_CHARDEV(chr); 245 246 /* clear old pending fd array */ 247 g_free(s->write_msgfds); 248 s->write_msgfds = NULL; 249 s->write_msgfds_num = 0; 250 251 if (!s->connected || 252 !qio_channel_has_feature(s->ioc, 253 QIO_CHANNEL_FEATURE_FD_PASS)) { 254 return -1; 255 } 256 257 if (num) { 258 s->write_msgfds = g_new(int, num); 259 memcpy(s->write_msgfds, fds, num * sizeof(int)); 260 } 261 262 s->write_msgfds_num = num; 263 264 return 0; 265 } 266 267 static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len) 268 { 269 SocketChardev *s = SOCKET_CHARDEV(chr); 270 struct iovec iov = { .iov_base = buf, .iov_len = len }; 271 int ret; 272 size_t i; 273 int *msgfds = NULL; 274 size_t msgfds_num = 0; 275 276 if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) { 277 ret = qio_channel_readv_full(s->ioc, &iov, 1, 278 &msgfds, &msgfds_num, 279 NULL); 280 } else { 281 ret = qio_channel_readv_full(s->ioc, &iov, 1, 282 NULL, NULL, 283 NULL); 284 } 285 286 if (ret == QIO_CHANNEL_ERR_BLOCK) { 287 errno = EAGAIN; 288 ret = -1; 289 } else if (ret == -1) { 290 errno = EIO; 291 } 292 293 if (msgfds_num) { 294 /* close and clean read_msgfds */ 295 for (i = 0; i < s->read_msgfds_num; i++) { 296 close(s->read_msgfds[i]); 297 } 298 299 if (s->read_msgfds_num) { 300 g_free(s->read_msgfds); 301 } 302 303 s->read_msgfds = msgfds; 304 s->read_msgfds_num = msgfds_num; 305 } 306 307 for (i = 0; i < s->read_msgfds_num; i++) { 308 int fd = s->read_msgfds[i]; 309 if (fd < 0) { 310 continue; 311 } 312 313 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */ 314 qemu_set_block(fd); 315 316 #ifndef MSG_CMSG_CLOEXEC 317 qemu_set_cloexec(fd); 318 #endif 319 } 320 321 return ret; 322 } 323 324 static GSource *tcp_chr_add_watch(Chardev *chr, GIOCondition cond) 325 { 326 SocketChardev *s = SOCKET_CHARDEV(chr); 327 return qio_channel_create_watch(s->ioc, cond); 328 } 329 330 static void tcp_chr_free_connection(Chardev *chr) 331 { 332 SocketChardev *s = SOCKET_CHARDEV(chr); 333 int i; 334 335 if (!s->connected) { 336 return; 337 } 338 339 if (s->read_msgfds_num) { 340 for (i = 0; i < s->read_msgfds_num; i++) { 341 close(s->read_msgfds[i]); 342 } 343 g_free(s->read_msgfds); 344 s->read_msgfds = NULL; 345 s->read_msgfds_num = 0; 346 } 347 348 tcp_set_msgfds(chr, NULL, 0); 349 remove_fd_in_watch(chr); 350 object_unref(OBJECT(s->sioc)); 351 s->sioc = NULL; 352 object_unref(OBJECT(s->ioc)); 353 s->ioc = NULL; 354 g_free(chr->filename); 355 chr->filename = NULL; 356 s->connected = 0; 357 } 358 359 static char *SocketAddress_to_str(const char *prefix, SocketAddress *addr, 360 bool is_listen, bool is_telnet) 361 { 362 switch (addr->type) { 363 case SOCKET_ADDRESS_TYPE_INET: 364 return g_strdup_printf("%s%s:%s:%s%s", prefix, 365 is_telnet ? "telnet" : "tcp", 366 addr->u.inet.host, 367 addr->u.inet.port, 368 is_listen ? ",server" : ""); 369 break; 370 case SOCKET_ADDRESS_TYPE_UNIX: 371 return g_strdup_printf("%sunix:%s%s", prefix, 372 addr->u.q_unix.path, 373 is_listen ? ",server" : ""); 374 break; 375 case SOCKET_ADDRESS_TYPE_FD: 376 return g_strdup_printf("%sfd:%s%s", prefix, addr->u.fd.str, 377 is_listen ? ",server" : ""); 378 break; 379 case SOCKET_ADDRESS_TYPE_VSOCK: 380 return g_strdup_printf("%svsock:%s:%s", prefix, 381 addr->u.vsock.cid, 382 addr->u.vsock.port); 383 default: 384 abort(); 385 } 386 } 387 388 static void update_disconnected_filename(SocketChardev *s) 389 { 390 Chardev *chr = CHARDEV(s); 391 392 g_free(chr->filename); 393 chr->filename = SocketAddress_to_str("disconnected:", s->addr, 394 s->is_listen, s->is_telnet); 395 } 396 397 static void tcp_chr_disconnect(Chardev *chr) 398 { 399 SocketChardev *s = SOCKET_CHARDEV(chr); 400 401 if (!s->connected) { 402 return; 403 } 404 405 tcp_chr_free_connection(chr); 406 407 if (s->listen_ioc) { 408 s->listen_tag = qio_channel_add_watch( 409 QIO_CHANNEL(s->listen_ioc), G_IO_IN, tcp_chr_accept, chr, NULL); 410 } 411 update_disconnected_filename(s); 412 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 413 if (s->reconnect_time) { 414 qemu_chr_socket_restart_timer(chr); 415 } 416 } 417 418 static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) 419 { 420 Chardev *chr = CHARDEV(opaque); 421 SocketChardev *s = SOCKET_CHARDEV(opaque); 422 uint8_t buf[CHR_READ_BUF_LEN]; 423 int len, size; 424 425 if (!s->connected || s->max_size <= 0) { 426 return TRUE; 427 } 428 len = sizeof(buf); 429 if (len > s->max_size) { 430 len = s->max_size; 431 } 432 size = tcp_chr_recv(chr, (void *)buf, len); 433 if (size == 0 || size == -1) { 434 /* connection closed */ 435 tcp_chr_disconnect(chr); 436 } else if (size > 0) { 437 if (s->do_telnetopt) { 438 tcp_chr_process_IAC_bytes(chr, s, buf, &size); 439 } 440 if (size > 0) { 441 qemu_chr_be_write(chr, buf, size); 442 } 443 } 444 445 return TRUE; 446 } 447 448 static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len) 449 { 450 SocketChardev *s = SOCKET_CHARDEV(chr); 451 int size; 452 453 if (!s->connected) { 454 return 0; 455 } 456 457 size = tcp_chr_recv(chr, (void *) buf, len); 458 if (size == 0) { 459 /* connection closed */ 460 tcp_chr_disconnect(chr); 461 } 462 463 return size; 464 } 465 466 static char *sockaddr_to_str(struct sockaddr_storage *ss, socklen_t ss_len, 467 struct sockaddr_storage *ps, socklen_t ps_len, 468 bool is_listen, bool is_telnet) 469 { 470 char shost[NI_MAXHOST], sserv[NI_MAXSERV]; 471 char phost[NI_MAXHOST], pserv[NI_MAXSERV]; 472 const char *left = "", *right = ""; 473 474 switch (ss->ss_family) { 475 #ifndef _WIN32 476 case AF_UNIX: 477 return g_strdup_printf("unix:%s%s", 478 ((struct sockaddr_un *)(ss))->sun_path, 479 is_listen ? ",server" : ""); 480 #endif 481 case AF_INET6: 482 left = "["; 483 right = "]"; 484 /* fall through */ 485 case AF_INET: 486 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost), 487 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV); 488 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost), 489 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV); 490 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s", 491 is_telnet ? "telnet" : "tcp", 492 left, shost, right, sserv, 493 is_listen ? ",server" : "", 494 left, phost, right, pserv); 495 496 default: 497 return g_strdup_printf("unknown"); 498 } 499 } 500 501 static void tcp_chr_connect(void *opaque) 502 { 503 Chardev *chr = CHARDEV(opaque); 504 SocketChardev *s = SOCKET_CHARDEV(opaque); 505 506 g_free(chr->filename); 507 chr->filename = sockaddr_to_str( 508 &s->sioc->localAddr, s->sioc->localAddrLen, 509 &s->sioc->remoteAddr, s->sioc->remoteAddrLen, 510 s->is_listen, s->is_telnet); 511 512 s->connected = 1; 513 if (s->ioc) { 514 chr->gsource = io_add_watch_poll(chr, s->ioc, 515 tcp_chr_read_poll, 516 tcp_chr_read, 517 chr, NULL); 518 } 519 qemu_chr_be_event(chr, CHR_EVENT_OPENED); 520 } 521 522 static void tcp_chr_update_read_handler(Chardev *chr, 523 GMainContext *context) 524 { 525 SocketChardev *s = SOCKET_CHARDEV(chr); 526 527 if (!s->connected) { 528 return; 529 } 530 531 remove_fd_in_watch(chr); 532 if (s->ioc) { 533 chr->gsource = io_add_watch_poll(chr, s->ioc, 534 tcp_chr_read_poll, 535 tcp_chr_read, chr, 536 context); 537 } 538 } 539 540 typedef struct { 541 Chardev *chr; 542 char buf[21]; 543 size_t buflen; 544 } TCPChardevTelnetInit; 545 546 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, 547 GIOCondition cond G_GNUC_UNUSED, 548 gpointer user_data) 549 { 550 TCPChardevTelnetInit *init = user_data; 551 ssize_t ret; 552 553 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL); 554 if (ret < 0) { 555 if (ret == QIO_CHANNEL_ERR_BLOCK) { 556 ret = 0; 557 } else { 558 tcp_chr_disconnect(init->chr); 559 return FALSE; 560 } 561 } 562 init->buflen -= ret; 563 564 if (init->buflen == 0) { 565 tcp_chr_connect(init->chr); 566 return FALSE; 567 } 568 569 memmove(init->buf, init->buf + ret, init->buflen); 570 571 return TRUE; 572 } 573 574 static void tcp_chr_telnet_init(Chardev *chr) 575 { 576 SocketChardev *s = SOCKET_CHARDEV(chr); 577 TCPChardevTelnetInit *init = g_new0(TCPChardevTelnetInit, 1); 578 size_t n = 0; 579 580 #define IACSET(x, a, b, c) \ 581 do { \ 582 x[n++] = a; \ 583 x[n++] = b; \ 584 x[n++] = c; \ 585 } while (0) 586 587 init->chr = chr; 588 if (!s->is_tn3270) { 589 init->buflen = 12; 590 /* Prep the telnet negotion to put telnet in binary, 591 * no echo, single char mode */ 592 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ 593 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ 594 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ 595 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ 596 } else { 597 init->buflen = 21; 598 /* Prep the TN3270 negotion based on RFC1576 */ 599 IACSET(init->buf, 0xff, 0xfd, 0x19); /* IAC DO EOR */ 600 IACSET(init->buf, 0xff, 0xfb, 0x19); /* IAC WILL EOR */ 601 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO BINARY */ 602 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL BINARY */ 603 IACSET(init->buf, 0xff, 0xfd, 0x18); /* IAC DO TERMINAL TYPE */ 604 IACSET(init->buf, 0xff, 0xfa, 0x18); /* IAC SB TERMINAL TYPE */ 605 IACSET(init->buf, 0x01, 0xff, 0xf0); /* SEND IAC SE */ 606 } 607 608 #undef IACSET 609 610 qio_channel_add_watch( 611 s->ioc, G_IO_OUT, 612 tcp_chr_telnet_init_io, 613 init, NULL); 614 } 615 616 617 static void tcp_chr_tls_handshake(QIOTask *task, 618 gpointer user_data) 619 { 620 Chardev *chr = user_data; 621 SocketChardev *s = user_data; 622 623 if (qio_task_propagate_error(task, NULL)) { 624 tcp_chr_disconnect(chr); 625 } else { 626 /* tn3270 does not support TLS yet */ 627 if (s->do_telnetopt && !s->is_tn3270) { 628 tcp_chr_telnet_init(chr); 629 } else { 630 tcp_chr_connect(chr); 631 } 632 } 633 } 634 635 636 static void tcp_chr_tls_init(Chardev *chr) 637 { 638 SocketChardev *s = SOCKET_CHARDEV(chr); 639 QIOChannelTLS *tioc; 640 Error *err = NULL; 641 gchar *name; 642 643 if (s->is_listen) { 644 tioc = qio_channel_tls_new_server( 645 s->ioc, s->tls_creds, 646 NULL, /* XXX Use an ACL */ 647 &err); 648 } else { 649 tioc = qio_channel_tls_new_client( 650 s->ioc, s->tls_creds, 651 s->addr->u.inet.host, 652 &err); 653 } 654 if (tioc == NULL) { 655 error_free(err); 656 tcp_chr_disconnect(chr); 657 return; 658 } 659 name = g_strdup_printf("chardev-tls-%s-%s", 660 s->is_listen ? "server" : "client", 661 chr->label); 662 qio_channel_set_name(QIO_CHANNEL(tioc), name); 663 g_free(name); 664 object_unref(OBJECT(s->ioc)); 665 s->ioc = QIO_CHANNEL(tioc); 666 667 qio_channel_tls_handshake(tioc, 668 tcp_chr_tls_handshake, 669 chr, 670 NULL); 671 } 672 673 674 static void tcp_chr_set_client_ioc_name(Chardev *chr, 675 QIOChannelSocket *sioc) 676 { 677 SocketChardev *s = SOCKET_CHARDEV(chr); 678 char *name; 679 name = g_strdup_printf("chardev-tcp-%s-%s", 680 s->is_listen ? "server" : "client", 681 chr->label); 682 qio_channel_set_name(QIO_CHANNEL(sioc), name); 683 g_free(name); 684 685 } 686 687 static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc) 688 { 689 SocketChardev *s = SOCKET_CHARDEV(chr); 690 691 if (s->ioc != NULL) { 692 return -1; 693 } 694 695 s->ioc = QIO_CHANNEL(sioc); 696 object_ref(OBJECT(sioc)); 697 s->sioc = sioc; 698 object_ref(OBJECT(sioc)); 699 700 qio_channel_set_blocking(s->ioc, false, NULL); 701 702 if (s->do_nodelay) { 703 qio_channel_set_delay(s->ioc, false); 704 } 705 if (s->listen_tag) { 706 g_source_remove(s->listen_tag); 707 s->listen_tag = 0; 708 } 709 710 if (s->tls_creds) { 711 tcp_chr_tls_init(chr); 712 } else { 713 if (s->do_telnetopt) { 714 tcp_chr_telnet_init(chr); 715 } else { 716 tcp_chr_connect(chr); 717 } 718 } 719 720 return 0; 721 } 722 723 724 static int tcp_chr_add_client(Chardev *chr, int fd) 725 { 726 int ret; 727 QIOChannelSocket *sioc; 728 729 sioc = qio_channel_socket_new_fd(fd, NULL); 730 if (!sioc) { 731 return -1; 732 } 733 tcp_chr_set_client_ioc_name(chr, sioc); 734 ret = tcp_chr_new_client(chr, sioc); 735 object_unref(OBJECT(sioc)); 736 return ret; 737 } 738 739 static gboolean tcp_chr_accept(QIOChannel *channel, 740 GIOCondition cond, 741 void *opaque) 742 { 743 Chardev *chr = CHARDEV(opaque); 744 QIOChannelSocket *sioc; 745 746 sioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(channel), 747 NULL); 748 if (!sioc) { 749 return TRUE; 750 } 751 752 tcp_chr_new_client(chr, sioc); 753 754 object_unref(OBJECT(sioc)); 755 756 return TRUE; 757 } 758 759 static int tcp_chr_wait_connected(Chardev *chr, Error **errp) 760 { 761 SocketChardev *s = SOCKET_CHARDEV(chr); 762 QIOChannelSocket *sioc; 763 764 /* It can't wait on s->connected, since it is set asynchronously 765 * in TLS and telnet cases, only wait for an accepted socket */ 766 while (!s->ioc) { 767 if (s->is_listen) { 768 error_report("QEMU waiting for connection on: %s", 769 chr->filename); 770 qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), true, NULL); 771 tcp_chr_accept(QIO_CHANNEL(s->listen_ioc), G_IO_IN, chr); 772 qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), false, NULL); 773 } else { 774 sioc = qio_channel_socket_new(); 775 tcp_chr_set_client_ioc_name(chr, sioc); 776 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) { 777 object_unref(OBJECT(sioc)); 778 return -1; 779 } 780 tcp_chr_new_client(chr, sioc); 781 object_unref(OBJECT(sioc)); 782 } 783 } 784 785 return 0; 786 } 787 788 static void char_socket_finalize(Object *obj) 789 { 790 Chardev *chr = CHARDEV(obj); 791 SocketChardev *s = SOCKET_CHARDEV(obj); 792 793 tcp_chr_free_connection(chr); 794 795 if (s->reconnect_timer) { 796 g_source_remove(s->reconnect_timer); 797 s->reconnect_timer = 0; 798 } 799 qapi_free_SocketAddress(s->addr); 800 if (s->listen_tag) { 801 g_source_remove(s->listen_tag); 802 s->listen_tag = 0; 803 } 804 if (s->listen_ioc) { 805 object_unref(OBJECT(s->listen_ioc)); 806 } 807 if (s->tls_creds) { 808 object_unref(OBJECT(s->tls_creds)); 809 } 810 811 qemu_chr_be_event(chr, CHR_EVENT_CLOSED); 812 } 813 814 static void qemu_chr_socket_connected(QIOTask *task, void *opaque) 815 { 816 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); 817 Chardev *chr = CHARDEV(opaque); 818 SocketChardev *s = SOCKET_CHARDEV(chr); 819 Error *err = NULL; 820 821 if (qio_task_propagate_error(task, &err)) { 822 check_report_connect_error(chr, err); 823 error_free(err); 824 goto cleanup; 825 } 826 827 s->connect_err_reported = false; 828 tcp_chr_new_client(chr, sioc); 829 830 cleanup: 831 object_unref(OBJECT(sioc)); 832 } 833 834 static gboolean socket_reconnect_timeout(gpointer opaque) 835 { 836 Chardev *chr = CHARDEV(opaque); 837 SocketChardev *s = SOCKET_CHARDEV(opaque); 838 QIOChannelSocket *sioc; 839 840 s->reconnect_timer = 0; 841 842 if (chr->be_open) { 843 return false; 844 } 845 846 sioc = qio_channel_socket_new(); 847 tcp_chr_set_client_ioc_name(chr, sioc); 848 qio_channel_socket_connect_async(sioc, s->addr, 849 qemu_chr_socket_connected, 850 chr, NULL); 851 852 return false; 853 } 854 855 static void qmp_chardev_open_socket(Chardev *chr, 856 ChardevBackend *backend, 857 bool *be_opened, 858 Error **errp) 859 { 860 SocketChardev *s = SOCKET_CHARDEV(chr); 861 ChardevSocket *sock = backend->u.socket.data; 862 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false; 863 bool is_listen = sock->has_server ? sock->server : true; 864 bool is_telnet = sock->has_telnet ? sock->telnet : false; 865 bool is_tn3270 = sock->has_tn3270 ? sock->tn3270 : false; 866 bool is_waitconnect = sock->has_wait ? sock->wait : false; 867 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; 868 QIOChannelSocket *sioc = NULL; 869 SocketAddress *addr; 870 871 s->is_listen = is_listen; 872 s->is_telnet = is_telnet; 873 s->is_tn3270 = is_tn3270; 874 s->do_nodelay = do_nodelay; 875 if (sock->tls_creds) { 876 Object *creds; 877 creds = object_resolve_path_component( 878 object_get_objects_root(), sock->tls_creds); 879 if (!creds) { 880 error_setg(errp, "No TLS credentials with id '%s'", 881 sock->tls_creds); 882 goto error; 883 } 884 s->tls_creds = (QCryptoTLSCreds *) 885 object_dynamic_cast(creds, 886 TYPE_QCRYPTO_TLS_CREDS); 887 if (!s->tls_creds) { 888 error_setg(errp, "Object with id '%s' is not TLS credentials", 889 sock->tls_creds); 890 goto error; 891 } 892 object_ref(OBJECT(s->tls_creds)); 893 if (is_listen) { 894 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { 895 error_setg(errp, "%s", 896 "Expected TLS credentials for server endpoint"); 897 goto error; 898 } 899 } else { 900 if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { 901 error_setg(errp, "%s", 902 "Expected TLS credentials for client endpoint"); 903 goto error; 904 } 905 } 906 } 907 908 s->addr = addr = socket_address_flatten(sock->addr); 909 910 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); 911 /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */ 912 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) { 913 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); 914 } 915 916 /* be isn't opened until we get a connection */ 917 *be_opened = false; 918 919 update_disconnected_filename(s); 920 921 if (is_listen) { 922 if (is_telnet || is_tn3270) { 923 s->do_telnetopt = 1; 924 } 925 } else if (reconnect > 0) { 926 s->reconnect_time = reconnect; 927 } 928 929 if (s->reconnect_time) { 930 sioc = qio_channel_socket_new(); 931 tcp_chr_set_client_ioc_name(chr, sioc); 932 qio_channel_socket_connect_async(sioc, s->addr, 933 qemu_chr_socket_connected, 934 chr, NULL); 935 } else { 936 if (s->is_listen) { 937 char *name; 938 sioc = qio_channel_socket_new(); 939 940 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label); 941 qio_channel_set_name(QIO_CHANNEL(sioc), name); 942 g_free(name); 943 944 if (qio_channel_socket_listen_sync(sioc, s->addr, errp) < 0) { 945 goto error; 946 } 947 948 qapi_free_SocketAddress(s->addr); 949 s->addr = socket_local_address(sioc->fd, errp); 950 update_disconnected_filename(s); 951 952 s->listen_ioc = sioc; 953 if (is_waitconnect && 954 qemu_chr_wait_connected(chr, errp) < 0) { 955 return; 956 } 957 if (!s->ioc) { 958 s->listen_tag = qio_channel_add_watch( 959 QIO_CHANNEL(s->listen_ioc), G_IO_IN, 960 tcp_chr_accept, chr, NULL); 961 } 962 } else if (qemu_chr_wait_connected(chr, errp) < 0) { 963 goto error; 964 } 965 } 966 967 return; 968 969 error: 970 if (sioc) { 971 object_unref(OBJECT(sioc)); 972 } 973 } 974 975 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend, 976 Error **errp) 977 { 978 bool is_listen = qemu_opt_get_bool(opts, "server", false); 979 bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true); 980 bool is_telnet = qemu_opt_get_bool(opts, "telnet", false); 981 bool is_tn3270 = qemu_opt_get_bool(opts, "tn3270", false); 982 bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true); 983 int64_t reconnect = qemu_opt_get_number(opts, "reconnect", 0); 984 const char *path = qemu_opt_get(opts, "path"); 985 const char *host = qemu_opt_get(opts, "host"); 986 const char *port = qemu_opt_get(opts, "port"); 987 const char *tls_creds = qemu_opt_get(opts, "tls-creds"); 988 SocketAddressLegacy *addr; 989 ChardevSocket *sock; 990 991 backend->type = CHARDEV_BACKEND_KIND_SOCKET; 992 if (!path) { 993 if (!host) { 994 error_setg(errp, "chardev: socket: no host given"); 995 return; 996 } 997 if (!port) { 998 error_setg(errp, "chardev: socket: no port given"); 999 return; 1000 } 1001 } else { 1002 if (tls_creds) { 1003 error_setg(errp, "TLS can only be used over TCP socket"); 1004 return; 1005 } 1006 } 1007 1008 sock = backend->u.socket.data = g_new0(ChardevSocket, 1); 1009 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock)); 1010 1011 sock->has_nodelay = true; 1012 sock->nodelay = do_nodelay; 1013 sock->has_server = true; 1014 sock->server = is_listen; 1015 sock->has_telnet = true; 1016 sock->telnet = is_telnet; 1017 sock->has_tn3270 = true; 1018 sock->tn3270 = is_tn3270; 1019 sock->has_wait = true; 1020 sock->wait = is_waitconnect; 1021 sock->has_reconnect = true; 1022 sock->reconnect = reconnect; 1023 sock->tls_creds = g_strdup(tls_creds); 1024 1025 addr = g_new0(SocketAddressLegacy, 1); 1026 if (path) { 1027 UnixSocketAddress *q_unix; 1028 addr->type = SOCKET_ADDRESS_LEGACY_KIND_UNIX; 1029 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); 1030 q_unix->path = g_strdup(path); 1031 } else { 1032 addr->type = SOCKET_ADDRESS_LEGACY_KIND_INET; 1033 addr->u.inet.data = g_new(InetSocketAddress, 1); 1034 *addr->u.inet.data = (InetSocketAddress) { 1035 .host = g_strdup(host), 1036 .port = g_strdup(port), 1037 .has_to = qemu_opt_get(opts, "to"), 1038 .to = qemu_opt_get_number(opts, "to", 0), 1039 .has_ipv4 = qemu_opt_get(opts, "ipv4"), 1040 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), 1041 .has_ipv6 = qemu_opt_get(opts, "ipv6"), 1042 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), 1043 }; 1044 } 1045 sock->addr = addr; 1046 } 1047 1048 static void 1049 char_socket_get_addr(Object *obj, Visitor *v, const char *name, 1050 void *opaque, Error **errp) 1051 { 1052 SocketChardev *s = SOCKET_CHARDEV(obj); 1053 1054 visit_type_SocketAddress(v, name, &s->addr, errp); 1055 } 1056 1057 static bool 1058 char_socket_get_connected(Object *obj, Error **errp) 1059 { 1060 SocketChardev *s = SOCKET_CHARDEV(obj); 1061 1062 return s->connected; 1063 } 1064 1065 static void char_socket_class_init(ObjectClass *oc, void *data) 1066 { 1067 ChardevClass *cc = CHARDEV_CLASS(oc); 1068 1069 cc->parse = qemu_chr_parse_socket; 1070 cc->open = qmp_chardev_open_socket; 1071 cc->chr_wait_connected = tcp_chr_wait_connected; 1072 cc->chr_write = tcp_chr_write; 1073 cc->chr_sync_read = tcp_chr_sync_read; 1074 cc->chr_disconnect = tcp_chr_disconnect; 1075 cc->get_msgfds = tcp_get_msgfds; 1076 cc->set_msgfds = tcp_set_msgfds; 1077 cc->chr_add_client = tcp_chr_add_client; 1078 cc->chr_add_watch = tcp_chr_add_watch; 1079 cc->chr_update_read_handler = tcp_chr_update_read_handler; 1080 1081 object_class_property_add(oc, "addr", "SocketAddress", 1082 char_socket_get_addr, NULL, 1083 NULL, NULL, &error_abort); 1084 1085 object_class_property_add_bool(oc, "connected", char_socket_get_connected, 1086 NULL, &error_abort); 1087 } 1088 1089 static const TypeInfo char_socket_type_info = { 1090 .name = TYPE_CHARDEV_SOCKET, 1091 .parent = TYPE_CHARDEV, 1092 .instance_size = sizeof(SocketChardev), 1093 .instance_finalize = char_socket_finalize, 1094 .class_init = char_socket_class_init, 1095 }; 1096 1097 static void register_types(void) 1098 { 1099 type_register_static(&char_socket_type_info); 1100 } 1101 1102 type_init(register_types); 1103