1 /* 2 * QEMU VNC display driver 3 * 4 * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws> 5 * Copyright (C) 2006 Fabrice Bellard 6 * Copyright (C) 2009 Red Hat, Inc 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a copy 9 * of this software and associated documentation files (the "Software"), to deal 10 * in the Software without restriction, including without limitation the rights 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 * copies of the Software, and to permit persons to whom the Software is 13 * furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice shall be included in 16 * all copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 * THE SOFTWARE. 25 */ 26 27 #include "qemu/osdep.h" 28 #include "vnc.h" 29 #include "vnc-jobs.h" 30 #include "trace.h" 31 #include "hw/qdev-core.h" 32 #include "sysemu/sysemu.h" 33 #include "sysemu/runstate.h" 34 #include "qemu/error-report.h" 35 #include "qemu/main-loop.h" 36 #include "qemu/module.h" 37 #include "qemu/option.h" 38 #include "qemu/sockets.h" 39 #include "qemu/timer.h" 40 #include "authz/list.h" 41 #include "qemu/config-file.h" 42 #include "qapi/qapi-emit-events.h" 43 #include "qapi/qapi-events-ui.h" 44 #include "qapi/error.h" 45 #include "qapi/qapi-commands-ui.h" 46 #include "ui/input.h" 47 #include "crypto/hash.h" 48 #include "crypto/tlscreds.h" 49 #include "crypto/tlscredsanon.h" 50 #include "crypto/tlscredsx509.h" 51 #include "crypto/random.h" 52 #include "crypto/secret_common.h" 53 #include "qom/object_interfaces.h" 54 #include "qemu/cutils.h" 55 #include "qemu/help_option.h" 56 #include "io/dns-resolver.h" 57 #include "monitor/monitor.h" 58 59 #define VNC_REFRESH_INTERVAL_BASE GUI_REFRESH_INTERVAL_DEFAULT 60 #define VNC_REFRESH_INTERVAL_INC 50 61 #define VNC_REFRESH_INTERVAL_MAX GUI_REFRESH_INTERVAL_IDLE 62 static const struct timeval VNC_REFRESH_STATS = { 0, 500000 }; 63 static const struct timeval VNC_REFRESH_LOSSY = { 2, 0 }; 64 65 #include "vnc_keysym.h" 66 #include "crypto/cipher.h" 67 68 static QTAILQ_HEAD(, VncDisplay) vnc_displays = 69 QTAILQ_HEAD_INITIALIZER(vnc_displays); 70 71 static int vnc_cursor_define(VncState *vs); 72 static void vnc_update_throttle_offset(VncState *vs); 73 74 static void vnc_set_share_mode(VncState *vs, VncShareMode mode) 75 { 76 #ifdef _VNC_DEBUG 77 static const char *mn[] = { 78 [0] = "undefined", 79 [VNC_SHARE_MODE_CONNECTING] = "connecting", 80 [VNC_SHARE_MODE_SHARED] = "shared", 81 [VNC_SHARE_MODE_EXCLUSIVE] = "exclusive", 82 [VNC_SHARE_MODE_DISCONNECTED] = "disconnected", 83 }; 84 fprintf(stderr, "%s/%p: %s -> %s\n", __func__, 85 vs->ioc, mn[vs->share_mode], mn[mode]); 86 #endif 87 88 switch (vs->share_mode) { 89 case VNC_SHARE_MODE_CONNECTING: 90 vs->vd->num_connecting--; 91 break; 92 case VNC_SHARE_MODE_SHARED: 93 vs->vd->num_shared--; 94 break; 95 case VNC_SHARE_MODE_EXCLUSIVE: 96 vs->vd->num_exclusive--; 97 break; 98 default: 99 break; 100 } 101 102 vs->share_mode = mode; 103 104 switch (vs->share_mode) { 105 case VNC_SHARE_MODE_CONNECTING: 106 vs->vd->num_connecting++; 107 break; 108 case VNC_SHARE_MODE_SHARED: 109 vs->vd->num_shared++; 110 break; 111 case VNC_SHARE_MODE_EXCLUSIVE: 112 vs->vd->num_exclusive++; 113 break; 114 default: 115 break; 116 } 117 } 118 119 120 static void vnc_init_basic_info(SocketAddress *addr, 121 VncBasicInfo *info, 122 Error **errp) 123 { 124 switch (addr->type) { 125 case SOCKET_ADDRESS_TYPE_INET: 126 info->host = g_strdup(addr->u.inet.host); 127 info->service = g_strdup(addr->u.inet.port); 128 if (addr->u.inet.ipv6) { 129 info->family = NETWORK_ADDRESS_FAMILY_IPV6; 130 } else { 131 info->family = NETWORK_ADDRESS_FAMILY_IPV4; 132 } 133 break; 134 135 case SOCKET_ADDRESS_TYPE_UNIX: 136 info->host = g_strdup(""); 137 info->service = g_strdup(addr->u.q_unix.path); 138 info->family = NETWORK_ADDRESS_FAMILY_UNIX; 139 break; 140 141 case SOCKET_ADDRESS_TYPE_VSOCK: 142 case SOCKET_ADDRESS_TYPE_FD: 143 error_setg(errp, "Unsupported socket address type %s", 144 SocketAddressType_str(addr->type)); 145 break; 146 default: 147 abort(); 148 } 149 150 return; 151 } 152 153 static void vnc_init_basic_info_from_server_addr(QIOChannelSocket *ioc, 154 VncBasicInfo *info, 155 Error **errp) 156 { 157 SocketAddress *addr = NULL; 158 159 if (!ioc) { 160 error_setg(errp, "No listener socket available"); 161 return; 162 } 163 164 addr = qio_channel_socket_get_local_address(ioc, errp); 165 if (!addr) { 166 return; 167 } 168 169 vnc_init_basic_info(addr, info, errp); 170 qapi_free_SocketAddress(addr); 171 } 172 173 static void vnc_init_basic_info_from_remote_addr(QIOChannelSocket *ioc, 174 VncBasicInfo *info, 175 Error **errp) 176 { 177 SocketAddress *addr = NULL; 178 179 addr = qio_channel_socket_get_remote_address(ioc, errp); 180 if (!addr) { 181 return; 182 } 183 184 vnc_init_basic_info(addr, info, errp); 185 qapi_free_SocketAddress(addr); 186 } 187 188 static const char *vnc_auth_name(VncDisplay *vd) { 189 switch (vd->auth) { 190 case VNC_AUTH_INVALID: 191 return "invalid"; 192 case VNC_AUTH_NONE: 193 return "none"; 194 case VNC_AUTH_VNC: 195 return "vnc"; 196 case VNC_AUTH_RA2: 197 return "ra2"; 198 case VNC_AUTH_RA2NE: 199 return "ra2ne"; 200 case VNC_AUTH_TIGHT: 201 return "tight"; 202 case VNC_AUTH_ULTRA: 203 return "ultra"; 204 case VNC_AUTH_TLS: 205 return "tls"; 206 case VNC_AUTH_VENCRYPT: 207 switch (vd->subauth) { 208 case VNC_AUTH_VENCRYPT_PLAIN: 209 return "vencrypt+plain"; 210 case VNC_AUTH_VENCRYPT_TLSNONE: 211 return "vencrypt+tls+none"; 212 case VNC_AUTH_VENCRYPT_TLSVNC: 213 return "vencrypt+tls+vnc"; 214 case VNC_AUTH_VENCRYPT_TLSPLAIN: 215 return "vencrypt+tls+plain"; 216 case VNC_AUTH_VENCRYPT_X509NONE: 217 return "vencrypt+x509+none"; 218 case VNC_AUTH_VENCRYPT_X509VNC: 219 return "vencrypt+x509+vnc"; 220 case VNC_AUTH_VENCRYPT_X509PLAIN: 221 return "vencrypt+x509+plain"; 222 case VNC_AUTH_VENCRYPT_TLSSASL: 223 return "vencrypt+tls+sasl"; 224 case VNC_AUTH_VENCRYPT_X509SASL: 225 return "vencrypt+x509+sasl"; 226 default: 227 return "vencrypt"; 228 } 229 case VNC_AUTH_SASL: 230 return "sasl"; 231 } 232 return "unknown"; 233 } 234 235 static VncServerInfo *vnc_server_info_get(VncDisplay *vd) 236 { 237 VncServerInfo *info; 238 Error *err = NULL; 239 240 if (!vd->listener || !vd->listener->nsioc) { 241 return NULL; 242 } 243 244 info = g_malloc0(sizeof(*info)); 245 vnc_init_basic_info_from_server_addr(vd->listener->sioc[0], 246 qapi_VncServerInfo_base(info), &err); 247 info->has_auth = true; 248 info->auth = g_strdup(vnc_auth_name(vd)); 249 if (err) { 250 qapi_free_VncServerInfo(info); 251 info = NULL; 252 error_free(err); 253 } 254 return info; 255 } 256 257 static void vnc_client_cache_auth(VncState *client) 258 { 259 if (!client->info) { 260 return; 261 } 262 263 if (client->tls) { 264 client->info->x509_dname = 265 qcrypto_tls_session_get_peer_name(client->tls); 266 client->info->has_x509_dname = 267 client->info->x509_dname != NULL; 268 } 269 #ifdef CONFIG_VNC_SASL 270 if (client->sasl.conn && 271 client->sasl.username) { 272 client->info->has_sasl_username = true; 273 client->info->sasl_username = g_strdup(client->sasl.username); 274 } 275 #endif 276 } 277 278 static void vnc_client_cache_addr(VncState *client) 279 { 280 Error *err = NULL; 281 282 client->info = g_malloc0(sizeof(*client->info)); 283 vnc_init_basic_info_from_remote_addr(client->sioc, 284 qapi_VncClientInfo_base(client->info), 285 &err); 286 client->info->websocket = client->websocket; 287 if (err) { 288 qapi_free_VncClientInfo(client->info); 289 client->info = NULL; 290 error_free(err); 291 } 292 } 293 294 static void vnc_qmp_event(VncState *vs, QAPIEvent event) 295 { 296 VncServerInfo *si; 297 298 if (!vs->info) { 299 return; 300 } 301 302 si = vnc_server_info_get(vs->vd); 303 if (!si) { 304 return; 305 } 306 307 switch (event) { 308 case QAPI_EVENT_VNC_CONNECTED: 309 qapi_event_send_vnc_connected(si, qapi_VncClientInfo_base(vs->info)); 310 break; 311 case QAPI_EVENT_VNC_INITIALIZED: 312 qapi_event_send_vnc_initialized(si, vs->info); 313 break; 314 case QAPI_EVENT_VNC_DISCONNECTED: 315 qapi_event_send_vnc_disconnected(si, vs->info); 316 break; 317 default: 318 break; 319 } 320 321 qapi_free_VncServerInfo(si); 322 } 323 324 static VncClientInfo *qmp_query_vnc_client(const VncState *client) 325 { 326 VncClientInfo *info; 327 Error *err = NULL; 328 329 info = g_malloc0(sizeof(*info)); 330 331 vnc_init_basic_info_from_remote_addr(client->sioc, 332 qapi_VncClientInfo_base(info), 333 &err); 334 if (err) { 335 error_free(err); 336 qapi_free_VncClientInfo(info); 337 return NULL; 338 } 339 340 info->websocket = client->websocket; 341 342 if (client->tls) { 343 info->x509_dname = qcrypto_tls_session_get_peer_name(client->tls); 344 info->has_x509_dname = info->x509_dname != NULL; 345 } 346 #ifdef CONFIG_VNC_SASL 347 if (client->sasl.conn && client->sasl.username) { 348 info->has_sasl_username = true; 349 info->sasl_username = g_strdup(client->sasl.username); 350 } 351 #endif 352 353 return info; 354 } 355 356 static VncDisplay *vnc_display_find(const char *id) 357 { 358 VncDisplay *vd; 359 360 if (id == NULL) { 361 return QTAILQ_FIRST(&vnc_displays); 362 } 363 QTAILQ_FOREACH(vd, &vnc_displays, next) { 364 if (strcmp(id, vd->id) == 0) { 365 return vd; 366 } 367 } 368 return NULL; 369 } 370 371 static VncClientInfoList *qmp_query_client_list(VncDisplay *vd) 372 { 373 VncClientInfoList *prev = NULL; 374 VncState *client; 375 376 QTAILQ_FOREACH(client, &vd->clients, next) { 377 QAPI_LIST_PREPEND(prev, qmp_query_vnc_client(client)); 378 } 379 return prev; 380 } 381 382 VncInfo *qmp_query_vnc(Error **errp) 383 { 384 VncInfo *info = g_malloc0(sizeof(*info)); 385 VncDisplay *vd = vnc_display_find(NULL); 386 SocketAddress *addr = NULL; 387 388 if (vd == NULL || !vd->listener || !vd->listener->nsioc) { 389 info->enabled = false; 390 } else { 391 info->enabled = true; 392 393 /* for compatibility with the original command */ 394 info->has_clients = true; 395 info->clients = qmp_query_client_list(vd); 396 397 addr = qio_channel_socket_get_local_address(vd->listener->sioc[0], 398 errp); 399 if (!addr) { 400 goto out_error; 401 } 402 403 switch (addr->type) { 404 case SOCKET_ADDRESS_TYPE_INET: 405 info->host = g_strdup(addr->u.inet.host); 406 info->service = g_strdup(addr->u.inet.port); 407 if (addr->u.inet.ipv6) { 408 info->family = NETWORK_ADDRESS_FAMILY_IPV6; 409 } else { 410 info->family = NETWORK_ADDRESS_FAMILY_IPV4; 411 } 412 break; 413 414 case SOCKET_ADDRESS_TYPE_UNIX: 415 info->host = g_strdup(""); 416 info->service = g_strdup(addr->u.q_unix.path); 417 info->family = NETWORK_ADDRESS_FAMILY_UNIX; 418 break; 419 420 case SOCKET_ADDRESS_TYPE_VSOCK: 421 case SOCKET_ADDRESS_TYPE_FD: 422 error_setg(errp, "Unsupported socket address type %s", 423 SocketAddressType_str(addr->type)); 424 goto out_error; 425 default: 426 abort(); 427 } 428 429 info->has_host = true; 430 info->has_service = true; 431 info->has_family = true; 432 433 info->has_auth = true; 434 info->auth = g_strdup(vnc_auth_name(vd)); 435 } 436 437 qapi_free_SocketAddress(addr); 438 return info; 439 440 out_error: 441 qapi_free_SocketAddress(addr); 442 qapi_free_VncInfo(info); 443 return NULL; 444 } 445 446 447 static void qmp_query_auth(int auth, int subauth, 448 VncPrimaryAuth *qmp_auth, 449 VncVencryptSubAuth *qmp_vencrypt, 450 bool *qmp_has_vencrypt); 451 452 static VncServerInfo2List *qmp_query_server_entry(QIOChannelSocket *ioc, 453 bool websocket, 454 int auth, 455 int subauth, 456 VncServerInfo2List *prev) 457 { 458 VncServerInfo2 *info; 459 Error *err = NULL; 460 SocketAddress *addr; 461 462 addr = qio_channel_socket_get_local_address(ioc, NULL); 463 if (!addr) { 464 return prev; 465 } 466 467 info = g_new0(VncServerInfo2, 1); 468 vnc_init_basic_info(addr, qapi_VncServerInfo2_base(info), &err); 469 qapi_free_SocketAddress(addr); 470 if (err) { 471 qapi_free_VncServerInfo2(info); 472 error_free(err); 473 return prev; 474 } 475 info->websocket = websocket; 476 477 qmp_query_auth(auth, subauth, &info->auth, 478 &info->vencrypt, &info->has_vencrypt); 479 480 QAPI_LIST_PREPEND(prev, info); 481 return prev; 482 } 483 484 static void qmp_query_auth(int auth, int subauth, 485 VncPrimaryAuth *qmp_auth, 486 VncVencryptSubAuth *qmp_vencrypt, 487 bool *qmp_has_vencrypt) 488 { 489 switch (auth) { 490 case VNC_AUTH_VNC: 491 *qmp_auth = VNC_PRIMARY_AUTH_VNC; 492 break; 493 case VNC_AUTH_RA2: 494 *qmp_auth = VNC_PRIMARY_AUTH_RA2; 495 break; 496 case VNC_AUTH_RA2NE: 497 *qmp_auth = VNC_PRIMARY_AUTH_RA2NE; 498 break; 499 case VNC_AUTH_TIGHT: 500 *qmp_auth = VNC_PRIMARY_AUTH_TIGHT; 501 break; 502 case VNC_AUTH_ULTRA: 503 *qmp_auth = VNC_PRIMARY_AUTH_ULTRA; 504 break; 505 case VNC_AUTH_TLS: 506 *qmp_auth = VNC_PRIMARY_AUTH_TLS; 507 break; 508 case VNC_AUTH_VENCRYPT: 509 *qmp_auth = VNC_PRIMARY_AUTH_VENCRYPT; 510 *qmp_has_vencrypt = true; 511 switch (subauth) { 512 case VNC_AUTH_VENCRYPT_PLAIN: 513 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_PLAIN; 514 break; 515 case VNC_AUTH_VENCRYPT_TLSNONE: 516 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_NONE; 517 break; 518 case VNC_AUTH_VENCRYPT_TLSVNC: 519 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_VNC; 520 break; 521 case VNC_AUTH_VENCRYPT_TLSPLAIN: 522 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_PLAIN; 523 break; 524 case VNC_AUTH_VENCRYPT_X509NONE: 525 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_NONE; 526 break; 527 case VNC_AUTH_VENCRYPT_X509VNC: 528 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_VNC; 529 break; 530 case VNC_AUTH_VENCRYPT_X509PLAIN: 531 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_PLAIN; 532 break; 533 case VNC_AUTH_VENCRYPT_TLSSASL: 534 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_SASL; 535 break; 536 case VNC_AUTH_VENCRYPT_X509SASL: 537 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_SASL; 538 break; 539 default: 540 *qmp_has_vencrypt = false; 541 break; 542 } 543 break; 544 case VNC_AUTH_SASL: 545 *qmp_auth = VNC_PRIMARY_AUTH_SASL; 546 break; 547 case VNC_AUTH_NONE: 548 default: 549 *qmp_auth = VNC_PRIMARY_AUTH_NONE; 550 break; 551 } 552 } 553 554 VncInfo2List *qmp_query_vnc_servers(Error **errp) 555 { 556 VncInfo2List *prev = NULL; 557 VncInfo2 *info; 558 VncDisplay *vd; 559 DeviceState *dev; 560 size_t i; 561 562 QTAILQ_FOREACH(vd, &vnc_displays, next) { 563 info = g_new0(VncInfo2, 1); 564 info->id = g_strdup(vd->id); 565 info->clients = qmp_query_client_list(vd); 566 qmp_query_auth(vd->auth, vd->subauth, &info->auth, 567 &info->vencrypt, &info->has_vencrypt); 568 if (vd->dcl.con) { 569 dev = DEVICE(object_property_get_link(OBJECT(vd->dcl.con), 570 "device", &error_abort)); 571 info->has_display = true; 572 info->display = g_strdup(dev->id); 573 } 574 for (i = 0; vd->listener != NULL && i < vd->listener->nsioc; i++) { 575 info->server = qmp_query_server_entry( 576 vd->listener->sioc[i], false, vd->auth, vd->subauth, 577 info->server); 578 } 579 for (i = 0; vd->wslistener != NULL && i < vd->wslistener->nsioc; i++) { 580 info->server = qmp_query_server_entry( 581 vd->wslistener->sioc[i], true, vd->ws_auth, 582 vd->ws_subauth, info->server); 583 } 584 585 QAPI_LIST_PREPEND(prev, info); 586 } 587 return prev; 588 } 589 590 bool vnc_display_reload_certs(const char *id, Error **errp) 591 { 592 VncDisplay *vd = vnc_display_find(id); 593 QCryptoTLSCredsClass *creds = NULL; 594 595 if (!vd) { 596 error_setg(errp, "Can not find vnc display"); 597 return false; 598 } 599 600 if (!vd->tlscreds) { 601 error_setg(errp, "vnc tls is not enabled"); 602 return false; 603 } 604 605 creds = QCRYPTO_TLS_CREDS_GET_CLASS(OBJECT(vd->tlscreds)); 606 if (creds->reload == NULL) { 607 error_setg(errp, "%s doesn't support to reload TLS credential", 608 object_get_typename(OBJECT(vd->tlscreds))); 609 return false; 610 } 611 if (!creds->reload(vd->tlscreds, errp)) { 612 return false; 613 } 614 615 return true; 616 } 617 618 /* TODO 619 1) Get the queue working for IO. 620 2) there is some weirdness when using the -S option (the screen is grey 621 and not totally invalidated 622 3) resolutions > 1024 623 */ 624 625 static int vnc_update_client(VncState *vs, int has_dirty); 626 static void vnc_disconnect_start(VncState *vs); 627 628 static void vnc_colordepth(VncState *vs); 629 static void framebuffer_update_request(VncState *vs, int incremental, 630 int x_position, int y_position, 631 int w, int h); 632 static void vnc_refresh(DisplayChangeListener *dcl); 633 static int vnc_refresh_server_surface(VncDisplay *vd); 634 635 static int vnc_width(VncDisplay *vd) 636 { 637 return MIN(VNC_MAX_WIDTH, ROUND_UP(surface_width(vd->ds), 638 VNC_DIRTY_PIXELS_PER_BIT)); 639 } 640 641 static int vnc_true_width(VncDisplay *vd) 642 { 643 return MIN(VNC_MAX_WIDTH, surface_width(vd->ds)); 644 } 645 646 static int vnc_height(VncDisplay *vd) 647 { 648 return MIN(VNC_MAX_HEIGHT, surface_height(vd->ds)); 649 } 650 651 static void vnc_set_area_dirty(DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], 652 VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT), 653 VncDisplay *vd, 654 int x, int y, int w, int h) 655 { 656 int width = vnc_width(vd); 657 int height = vnc_height(vd); 658 659 /* this is needed this to ensure we updated all affected 660 * blocks if x % VNC_DIRTY_PIXELS_PER_BIT != 0 */ 661 w += (x % VNC_DIRTY_PIXELS_PER_BIT); 662 x -= (x % VNC_DIRTY_PIXELS_PER_BIT); 663 664 x = MIN(x, width); 665 y = MIN(y, height); 666 w = MIN(x + w, width) - x; 667 h = MIN(y + h, height); 668 669 for (; y < h; y++) { 670 bitmap_set(dirty[y], x / VNC_DIRTY_PIXELS_PER_BIT, 671 DIV_ROUND_UP(w, VNC_DIRTY_PIXELS_PER_BIT)); 672 } 673 } 674 675 static void vnc_dpy_update(DisplayChangeListener *dcl, 676 int x, int y, int w, int h) 677 { 678 VncDisplay *vd = container_of(dcl, VncDisplay, dcl); 679 struct VncSurface *s = &vd->guest; 680 681 vnc_set_area_dirty(s->dirty, vd, x, y, w, h); 682 } 683 684 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, 685 int32_t encoding) 686 { 687 vnc_write_u16(vs, x); 688 vnc_write_u16(vs, y); 689 vnc_write_u16(vs, w); 690 vnc_write_u16(vs, h); 691 692 vnc_write_s32(vs, encoding); 693 } 694 695 static void vnc_desktop_resize_ext(VncState *vs, int reject_reason) 696 { 697 trace_vnc_msg_server_ext_desktop_resize( 698 vs, vs->ioc, vs->client_width, vs->client_height, reject_reason); 699 700 vnc_lock_output(vs); 701 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 702 vnc_write_u8(vs, 0); 703 vnc_write_u16(vs, 1); /* number of rects */ 704 vnc_framebuffer_update(vs, 705 reject_reason ? 1 : 0, 706 reject_reason, 707 vs->client_width, vs->client_height, 708 VNC_ENCODING_DESKTOP_RESIZE_EXT); 709 vnc_write_u8(vs, 1); /* number of screens */ 710 vnc_write_u8(vs, 0); /* padding */ 711 vnc_write_u8(vs, 0); /* padding */ 712 vnc_write_u8(vs, 0); /* padding */ 713 vnc_write_u32(vs, 0); /* screen id */ 714 vnc_write_u16(vs, 0); /* screen x-pos */ 715 vnc_write_u16(vs, 0); /* screen y-pos */ 716 vnc_write_u16(vs, vs->client_width); 717 vnc_write_u16(vs, vs->client_height); 718 vnc_write_u32(vs, 0); /* screen flags */ 719 vnc_unlock_output(vs); 720 vnc_flush(vs); 721 } 722 723 static void vnc_desktop_resize(VncState *vs) 724 { 725 if (vs->ioc == NULL || (!vnc_has_feature(vs, VNC_FEATURE_RESIZE) && 726 !vnc_has_feature(vs, VNC_FEATURE_RESIZE_EXT))) { 727 return; 728 } 729 if (vs->client_width == vs->vd->true_width && 730 vs->client_height == pixman_image_get_height(vs->vd->server)) { 731 return; 732 } 733 734 assert(vs->vd->true_width < 65536 && 735 vs->vd->true_width >= 0); 736 assert(pixman_image_get_height(vs->vd->server) < 65536 && 737 pixman_image_get_height(vs->vd->server) >= 0); 738 vs->client_width = vs->vd->true_width; 739 vs->client_height = pixman_image_get_height(vs->vd->server); 740 741 if (vnc_has_feature(vs, VNC_FEATURE_RESIZE_EXT)) { 742 vnc_desktop_resize_ext(vs, 0); 743 return; 744 } 745 746 trace_vnc_msg_server_desktop_resize( 747 vs, vs->ioc, vs->client_width, vs->client_height); 748 749 vnc_lock_output(vs); 750 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 751 vnc_write_u8(vs, 0); 752 vnc_write_u16(vs, 1); /* number of rects */ 753 vnc_framebuffer_update(vs, 0, 0, vs->client_width, vs->client_height, 754 VNC_ENCODING_DESKTOPRESIZE); 755 vnc_unlock_output(vs); 756 vnc_flush(vs); 757 } 758 759 static void vnc_abort_display_jobs(VncDisplay *vd) 760 { 761 VncState *vs; 762 763 QTAILQ_FOREACH(vs, &vd->clients, next) { 764 vnc_lock_output(vs); 765 vs->abort = true; 766 vnc_unlock_output(vs); 767 } 768 QTAILQ_FOREACH(vs, &vd->clients, next) { 769 vnc_jobs_join(vs); 770 } 771 QTAILQ_FOREACH(vs, &vd->clients, next) { 772 vnc_lock_output(vs); 773 if (vs->update == VNC_STATE_UPDATE_NONE && 774 vs->job_update != VNC_STATE_UPDATE_NONE) { 775 /* job aborted before completion */ 776 vs->update = vs->job_update; 777 vs->job_update = VNC_STATE_UPDATE_NONE; 778 } 779 vs->abort = false; 780 vnc_unlock_output(vs); 781 } 782 } 783 784 int vnc_server_fb_stride(VncDisplay *vd) 785 { 786 return pixman_image_get_stride(vd->server); 787 } 788 789 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y) 790 { 791 uint8_t *ptr; 792 793 ptr = (uint8_t *)pixman_image_get_data(vd->server); 794 ptr += y * vnc_server_fb_stride(vd); 795 ptr += x * VNC_SERVER_FB_BYTES; 796 return ptr; 797 } 798 799 static void vnc_update_server_surface(VncDisplay *vd) 800 { 801 int width, height; 802 803 qemu_pixman_image_unref(vd->server); 804 vd->server = NULL; 805 806 if (QTAILQ_EMPTY(&vd->clients)) { 807 return; 808 } 809 810 width = vnc_width(vd); 811 height = vnc_height(vd); 812 vd->true_width = vnc_true_width(vd); 813 vd->server = pixman_image_create_bits(VNC_SERVER_FB_FORMAT, 814 width, height, 815 NULL, 0); 816 817 memset(vd->guest.dirty, 0x00, sizeof(vd->guest.dirty)); 818 vnc_set_area_dirty(vd->guest.dirty, vd, 0, 0, 819 width, height); 820 } 821 822 static bool vnc_check_pageflip(DisplaySurface *s1, 823 DisplaySurface *s2) 824 { 825 return (s1 != NULL && 826 s2 != NULL && 827 surface_width(s1) == surface_width(s2) && 828 surface_height(s1) == surface_height(s2) && 829 surface_format(s1) == surface_format(s2)); 830 831 } 832 833 static void vnc_dpy_switch(DisplayChangeListener *dcl, 834 DisplaySurface *surface) 835 { 836 VncDisplay *vd = container_of(dcl, VncDisplay, dcl); 837 bool pageflip = vnc_check_pageflip(vd->ds, surface); 838 VncState *vs; 839 840 vnc_abort_display_jobs(vd); 841 vd->ds = surface; 842 843 /* guest surface */ 844 qemu_pixman_image_unref(vd->guest.fb); 845 vd->guest.fb = pixman_image_ref(surface->image); 846 vd->guest.format = surface->format; 847 848 849 if (pageflip) { 850 trace_vnc_server_dpy_pageflip(vd, 851 surface_width(surface), 852 surface_height(surface), 853 surface_format(surface)); 854 vnc_set_area_dirty(vd->guest.dirty, vd, 0, 0, 855 surface_width(surface), 856 surface_height(surface)); 857 return; 858 } 859 860 trace_vnc_server_dpy_recreate(vd, 861 surface_width(surface), 862 surface_height(surface), 863 surface_format(surface)); 864 /* server surface */ 865 vnc_update_server_surface(vd); 866 867 QTAILQ_FOREACH(vs, &vd->clients, next) { 868 vnc_colordepth(vs); 869 vnc_desktop_resize(vs); 870 vnc_cursor_define(vs); 871 memset(vs->dirty, 0x00, sizeof(vs->dirty)); 872 vnc_set_area_dirty(vs->dirty, vd, 0, 0, 873 vnc_width(vd), 874 vnc_height(vd)); 875 vnc_update_throttle_offset(vs); 876 } 877 } 878 879 /* fastest code */ 880 static void vnc_write_pixels_copy(VncState *vs, 881 void *pixels, int size) 882 { 883 vnc_write(vs, pixels, size); 884 } 885 886 /* slowest but generic code. */ 887 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v) 888 { 889 uint8_t r, g, b; 890 891 #if VNC_SERVER_FB_FORMAT == PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8) 892 r = (((v & 0x00ff0000) >> 16) << vs->client_pf.rbits) >> 8; 893 g = (((v & 0x0000ff00) >> 8) << vs->client_pf.gbits) >> 8; 894 b = (((v & 0x000000ff) >> 0) << vs->client_pf.bbits) >> 8; 895 #else 896 # error need some bits here if you change VNC_SERVER_FB_FORMAT 897 #endif 898 v = (r << vs->client_pf.rshift) | 899 (g << vs->client_pf.gshift) | 900 (b << vs->client_pf.bshift); 901 switch (vs->client_pf.bytes_per_pixel) { 902 case 1: 903 buf[0] = v; 904 break; 905 case 2: 906 if (vs->client_be) { 907 buf[0] = v >> 8; 908 buf[1] = v; 909 } else { 910 buf[1] = v >> 8; 911 buf[0] = v; 912 } 913 break; 914 default: 915 case 4: 916 if (vs->client_be) { 917 buf[0] = v >> 24; 918 buf[1] = v >> 16; 919 buf[2] = v >> 8; 920 buf[3] = v; 921 } else { 922 buf[3] = v >> 24; 923 buf[2] = v >> 16; 924 buf[1] = v >> 8; 925 buf[0] = v; 926 } 927 break; 928 } 929 } 930 931 static void vnc_write_pixels_generic(VncState *vs, 932 void *pixels1, int size) 933 { 934 uint8_t buf[4]; 935 936 if (VNC_SERVER_FB_BYTES == 4) { 937 uint32_t *pixels = pixels1; 938 int n, i; 939 n = size >> 2; 940 for (i = 0; i < n; i++) { 941 vnc_convert_pixel(vs, buf, pixels[i]); 942 vnc_write(vs, buf, vs->client_pf.bytes_per_pixel); 943 } 944 } 945 } 946 947 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h) 948 { 949 int i; 950 uint8_t *row; 951 VncDisplay *vd = vs->vd; 952 953 row = vnc_server_fb_ptr(vd, x, y); 954 for (i = 0; i < h; i++) { 955 vs->write_pixels(vs, row, w * VNC_SERVER_FB_BYTES); 956 row += vnc_server_fb_stride(vd); 957 } 958 return 1; 959 } 960 961 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h) 962 { 963 int n = 0; 964 965 switch(vs->vnc_encoding) { 966 case VNC_ENCODING_ZLIB: 967 n = vnc_zlib_send_framebuffer_update(vs, x, y, w, h); 968 break; 969 case VNC_ENCODING_HEXTILE: 970 vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_HEXTILE); 971 n = vnc_hextile_send_framebuffer_update(vs, x, y, w, h); 972 break; 973 case VNC_ENCODING_TIGHT: 974 n = vnc_tight_send_framebuffer_update(vs, x, y, w, h); 975 break; 976 case VNC_ENCODING_TIGHT_PNG: 977 n = vnc_tight_png_send_framebuffer_update(vs, x, y, w, h); 978 break; 979 case VNC_ENCODING_ZRLE: 980 n = vnc_zrle_send_framebuffer_update(vs, x, y, w, h); 981 break; 982 case VNC_ENCODING_ZYWRLE: 983 n = vnc_zywrle_send_framebuffer_update(vs, x, y, w, h); 984 break; 985 default: 986 vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_RAW); 987 n = vnc_raw_send_framebuffer_update(vs, x, y, w, h); 988 break; 989 } 990 return n; 991 } 992 993 static void vnc_mouse_set(DisplayChangeListener *dcl, 994 int x, int y, int visible) 995 { 996 /* can we ask the client(s) to move the pointer ??? */ 997 } 998 999 static int vnc_cursor_define(VncState *vs) 1000 { 1001 QEMUCursor *c = vs->vd->cursor; 1002 int isize; 1003 1004 if (!vs->vd->cursor) { 1005 return -1; 1006 } 1007 1008 if (vnc_has_feature(vs, VNC_FEATURE_ALPHA_CURSOR)) { 1009 vnc_lock_output(vs); 1010 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 1011 vnc_write_u8(vs, 0); /* padding */ 1012 vnc_write_u16(vs, 1); /* # of rects */ 1013 vnc_framebuffer_update(vs, c->hot_x, c->hot_y, c->width, c->height, 1014 VNC_ENCODING_ALPHA_CURSOR); 1015 vnc_write_s32(vs, VNC_ENCODING_RAW); 1016 vnc_write(vs, c->data, c->width * c->height * 4); 1017 vnc_unlock_output(vs); 1018 return 0; 1019 } 1020 if (vnc_has_feature(vs, VNC_FEATURE_RICH_CURSOR)) { 1021 vnc_lock_output(vs); 1022 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 1023 vnc_write_u8(vs, 0); /* padding */ 1024 vnc_write_u16(vs, 1); /* # of rects */ 1025 vnc_framebuffer_update(vs, c->hot_x, c->hot_y, c->width, c->height, 1026 VNC_ENCODING_RICH_CURSOR); 1027 isize = c->width * c->height * vs->client_pf.bytes_per_pixel; 1028 vnc_write_pixels_generic(vs, c->data, isize); 1029 vnc_write(vs, vs->vd->cursor_mask, vs->vd->cursor_msize); 1030 vnc_unlock_output(vs); 1031 return 0; 1032 } 1033 return -1; 1034 } 1035 1036 static void vnc_dpy_cursor_define(DisplayChangeListener *dcl, 1037 QEMUCursor *c) 1038 { 1039 VncDisplay *vd = container_of(dcl, VncDisplay, dcl); 1040 VncState *vs; 1041 1042 cursor_put(vd->cursor); 1043 g_free(vd->cursor_mask); 1044 1045 vd->cursor = c; 1046 cursor_get(vd->cursor); 1047 vd->cursor_msize = cursor_get_mono_bpl(c) * c->height; 1048 vd->cursor_mask = g_malloc0(vd->cursor_msize); 1049 cursor_get_mono_mask(c, 0, vd->cursor_mask); 1050 1051 QTAILQ_FOREACH(vs, &vd->clients, next) { 1052 vnc_cursor_define(vs); 1053 } 1054 } 1055 1056 static int find_and_clear_dirty_height(VncState *vs, 1057 int y, int last_x, int x, int height) 1058 { 1059 int h; 1060 1061 for (h = 1; h < (height - y); h++) { 1062 if (!test_bit(last_x, vs->dirty[y + h])) { 1063 break; 1064 } 1065 bitmap_clear(vs->dirty[y + h], last_x, x - last_x); 1066 } 1067 1068 return h; 1069 } 1070 1071 /* 1072 * Figure out how much pending data we should allow in the output 1073 * buffer before we throttle incremental display updates, and/or 1074 * drop audio samples. 1075 * 1076 * We allow for equiv of 1 full display's worth of FB updates, 1077 * and 1 second of audio samples. If audio backlog was larger 1078 * than that the client would already suffering awful audio 1079 * glitches, so dropping samples is no worse really). 1080 */ 1081 static void vnc_update_throttle_offset(VncState *vs) 1082 { 1083 size_t offset = 1084 vs->client_width * vs->client_height * vs->client_pf.bytes_per_pixel; 1085 1086 if (vs->audio_cap) { 1087 int bps; 1088 switch (vs->as.fmt) { 1089 default: 1090 case AUDIO_FORMAT_U8: 1091 case AUDIO_FORMAT_S8: 1092 bps = 1; 1093 break; 1094 case AUDIO_FORMAT_U16: 1095 case AUDIO_FORMAT_S16: 1096 bps = 2; 1097 break; 1098 case AUDIO_FORMAT_U32: 1099 case AUDIO_FORMAT_S32: 1100 bps = 4; 1101 break; 1102 } 1103 offset += vs->as.freq * bps * vs->as.nchannels; 1104 } 1105 1106 /* Put a floor of 1MB on offset, so that if we have a large pending 1107 * buffer and the display is resized to a small size & back again 1108 * we don't suddenly apply a tiny send limit 1109 */ 1110 offset = MAX(offset, 1024 * 1024); 1111 1112 if (vs->throttle_output_offset != offset) { 1113 trace_vnc_client_throttle_threshold( 1114 vs, vs->ioc, vs->throttle_output_offset, offset, vs->client_width, 1115 vs->client_height, vs->client_pf.bytes_per_pixel, vs->audio_cap); 1116 } 1117 1118 vs->throttle_output_offset = offset; 1119 } 1120 1121 static bool vnc_should_update(VncState *vs) 1122 { 1123 switch (vs->update) { 1124 case VNC_STATE_UPDATE_NONE: 1125 break; 1126 case VNC_STATE_UPDATE_INCREMENTAL: 1127 /* Only allow incremental updates if the pending send queue 1128 * is less than the permitted threshold, and the job worker 1129 * is completely idle. 1130 */ 1131 if (vs->output.offset < vs->throttle_output_offset && 1132 vs->job_update == VNC_STATE_UPDATE_NONE) { 1133 return true; 1134 } 1135 trace_vnc_client_throttle_incremental( 1136 vs, vs->ioc, vs->job_update, vs->output.offset); 1137 break; 1138 case VNC_STATE_UPDATE_FORCE: 1139 /* Only allow forced updates if the pending send queue 1140 * does not contain a previous forced update, and the 1141 * job worker is completely idle. 1142 * 1143 * Note this means we'll queue a forced update, even if 1144 * the output buffer size is otherwise over the throttle 1145 * output limit. 1146 */ 1147 if (vs->force_update_offset == 0 && 1148 vs->job_update == VNC_STATE_UPDATE_NONE) { 1149 return true; 1150 } 1151 trace_vnc_client_throttle_forced( 1152 vs, vs->ioc, vs->job_update, vs->force_update_offset); 1153 break; 1154 } 1155 return false; 1156 } 1157 1158 static int vnc_update_client(VncState *vs, int has_dirty) 1159 { 1160 VncDisplay *vd = vs->vd; 1161 VncJob *job; 1162 int y; 1163 int height, width; 1164 int n = 0; 1165 1166 if (vs->disconnecting) { 1167 vnc_disconnect_finish(vs); 1168 return 0; 1169 } 1170 1171 vs->has_dirty += has_dirty; 1172 if (!vnc_should_update(vs)) { 1173 return 0; 1174 } 1175 1176 if (!vs->has_dirty && vs->update != VNC_STATE_UPDATE_FORCE) { 1177 return 0; 1178 } 1179 1180 /* 1181 * Send screen updates to the vnc client using the server 1182 * surface and server dirty map. guest surface updates 1183 * happening in parallel don't disturb us, the next pass will 1184 * send them to the client. 1185 */ 1186 job = vnc_job_new(vs); 1187 1188 height = pixman_image_get_height(vd->server); 1189 width = pixman_image_get_width(vd->server); 1190 1191 y = 0; 1192 for (;;) { 1193 int x, h; 1194 unsigned long x2; 1195 unsigned long offset = find_next_bit((unsigned long *) &vs->dirty, 1196 height * VNC_DIRTY_BPL(vs), 1197 y * VNC_DIRTY_BPL(vs)); 1198 if (offset == height * VNC_DIRTY_BPL(vs)) { 1199 /* no more dirty bits */ 1200 break; 1201 } 1202 y = offset / VNC_DIRTY_BPL(vs); 1203 x = offset % VNC_DIRTY_BPL(vs); 1204 x2 = find_next_zero_bit((unsigned long *) &vs->dirty[y], 1205 VNC_DIRTY_BPL(vs), x); 1206 bitmap_clear(vs->dirty[y], x, x2 - x); 1207 h = find_and_clear_dirty_height(vs, y, x, x2, height); 1208 x2 = MIN(x2, width / VNC_DIRTY_PIXELS_PER_BIT); 1209 if (x2 > x) { 1210 n += vnc_job_add_rect(job, x * VNC_DIRTY_PIXELS_PER_BIT, y, 1211 (x2 - x) * VNC_DIRTY_PIXELS_PER_BIT, h); 1212 } 1213 if (!x && x2 == width / VNC_DIRTY_PIXELS_PER_BIT) { 1214 y += h; 1215 if (y == height) { 1216 break; 1217 } 1218 } 1219 } 1220 1221 vs->job_update = vs->update; 1222 vs->update = VNC_STATE_UPDATE_NONE; 1223 vnc_job_push(job); 1224 vs->has_dirty = 0; 1225 return n; 1226 } 1227 1228 /* audio */ 1229 static void audio_capture_notify(void *opaque, audcnotification_e cmd) 1230 { 1231 VncState *vs = opaque; 1232 1233 assert(vs->magic == VNC_MAGIC); 1234 switch (cmd) { 1235 case AUD_CNOTIFY_DISABLE: 1236 trace_vnc_msg_server_audio_end(vs, vs->ioc); 1237 vnc_lock_output(vs); 1238 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); 1239 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); 1240 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_END); 1241 vnc_unlock_output(vs); 1242 vnc_flush(vs); 1243 break; 1244 1245 case AUD_CNOTIFY_ENABLE: 1246 trace_vnc_msg_server_audio_begin(vs, vs->ioc); 1247 vnc_lock_output(vs); 1248 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); 1249 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); 1250 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_BEGIN); 1251 vnc_unlock_output(vs); 1252 vnc_flush(vs); 1253 break; 1254 } 1255 } 1256 1257 static void audio_capture_destroy(void *opaque) 1258 { 1259 } 1260 1261 static void audio_capture(void *opaque, const void *buf, int size) 1262 { 1263 VncState *vs = opaque; 1264 1265 assert(vs->magic == VNC_MAGIC); 1266 trace_vnc_msg_server_audio_data(vs, vs->ioc, buf, size); 1267 vnc_lock_output(vs); 1268 if (vs->output.offset < vs->throttle_output_offset) { 1269 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); 1270 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); 1271 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_DATA); 1272 vnc_write_u32(vs, size); 1273 vnc_write(vs, buf, size); 1274 } else { 1275 trace_vnc_client_throttle_audio(vs, vs->ioc, vs->output.offset); 1276 } 1277 vnc_unlock_output(vs); 1278 vnc_flush(vs); 1279 } 1280 1281 static void audio_add(VncState *vs) 1282 { 1283 struct audio_capture_ops ops; 1284 1285 if (vs->audio_cap) { 1286 error_report("audio already running"); 1287 return; 1288 } 1289 1290 ops.notify = audio_capture_notify; 1291 ops.destroy = audio_capture_destroy; 1292 ops.capture = audio_capture; 1293 1294 vs->audio_cap = AUD_add_capture(vs->vd->audio_state, &vs->as, &ops, vs); 1295 if (!vs->audio_cap) { 1296 error_report("Failed to add audio capture"); 1297 } 1298 } 1299 1300 static void audio_del(VncState *vs) 1301 { 1302 if (vs->audio_cap) { 1303 AUD_del_capture(vs->audio_cap, vs); 1304 vs->audio_cap = NULL; 1305 } 1306 } 1307 1308 static void vnc_disconnect_start(VncState *vs) 1309 { 1310 if (vs->disconnecting) { 1311 return; 1312 } 1313 trace_vnc_client_disconnect_start(vs, vs->ioc); 1314 vnc_set_share_mode(vs, VNC_SHARE_MODE_DISCONNECTED); 1315 if (vs->ioc_tag) { 1316 g_source_remove(vs->ioc_tag); 1317 vs->ioc_tag = 0; 1318 } 1319 qio_channel_close(vs->ioc, NULL); 1320 vs->disconnecting = TRUE; 1321 } 1322 1323 void vnc_disconnect_finish(VncState *vs) 1324 { 1325 int i; 1326 1327 trace_vnc_client_disconnect_finish(vs, vs->ioc); 1328 1329 vnc_jobs_join(vs); /* Wait encoding jobs */ 1330 1331 vnc_lock_output(vs); 1332 vnc_qmp_event(vs, QAPI_EVENT_VNC_DISCONNECTED); 1333 1334 buffer_free(&vs->input); 1335 buffer_free(&vs->output); 1336 1337 qapi_free_VncClientInfo(vs->info); 1338 1339 vnc_zlib_clear(vs); 1340 vnc_tight_clear(vs); 1341 vnc_zrle_clear(vs); 1342 1343 #ifdef CONFIG_VNC_SASL 1344 vnc_sasl_client_cleanup(vs); 1345 #endif /* CONFIG_VNC_SASL */ 1346 audio_del(vs); 1347 qkbd_state_lift_all_keys(vs->vd->kbd); 1348 1349 if (vs->mouse_mode_notifier.notify != NULL) { 1350 qemu_remove_mouse_mode_change_notifier(&vs->mouse_mode_notifier); 1351 } 1352 QTAILQ_REMOVE(&vs->vd->clients, vs, next); 1353 if (QTAILQ_EMPTY(&vs->vd->clients)) { 1354 /* last client gone */ 1355 vnc_update_server_surface(vs->vd); 1356 } 1357 vnc_unlock_output(vs); 1358 1359 if (vs->cbpeer.notifier.notify) { 1360 qemu_clipboard_peer_unregister(&vs->cbpeer); 1361 } 1362 1363 qemu_mutex_destroy(&vs->output_mutex); 1364 if (vs->bh != NULL) { 1365 qemu_bh_delete(vs->bh); 1366 } 1367 buffer_free(&vs->jobs_buffer); 1368 1369 for (i = 0; i < VNC_STAT_ROWS; ++i) { 1370 g_free(vs->lossy_rect[i]); 1371 } 1372 g_free(vs->lossy_rect); 1373 1374 object_unref(OBJECT(vs->ioc)); 1375 vs->ioc = NULL; 1376 object_unref(OBJECT(vs->sioc)); 1377 vs->sioc = NULL; 1378 vs->magic = 0; 1379 g_free(vs->zrle); 1380 g_free(vs->tight); 1381 g_free(vs); 1382 } 1383 1384 size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error *err) 1385 { 1386 if (ret <= 0) { 1387 if (ret == 0) { 1388 trace_vnc_client_eof(vs, vs->ioc); 1389 vnc_disconnect_start(vs); 1390 } else if (ret != QIO_CHANNEL_ERR_BLOCK) { 1391 trace_vnc_client_io_error(vs, vs->ioc, 1392 err ? error_get_pretty(err) : "Unknown"); 1393 vnc_disconnect_start(vs); 1394 } 1395 1396 error_free(err); 1397 return 0; 1398 } 1399 return ret; 1400 } 1401 1402 1403 void vnc_client_error(VncState *vs) 1404 { 1405 VNC_DEBUG("Closing down client sock: protocol error\n"); 1406 vnc_disconnect_start(vs); 1407 } 1408 1409 1410 /* 1411 * Called to write a chunk of data to the client socket. The data may 1412 * be the raw data, or may have already been encoded by SASL. 1413 * The data will be written either straight onto the socket, or 1414 * written via the GNUTLS wrappers, if TLS/SSL encryption is enabled 1415 * 1416 * NB, it is theoretically possible to have 2 layers of encryption, 1417 * both SASL, and this TLS layer. It is highly unlikely in practice 1418 * though, since SASL encryption will typically be a no-op if TLS 1419 * is active 1420 * 1421 * Returns the number of bytes written, which may be less than 1422 * the requested 'datalen' if the socket would block. Returns 1423 * 0 on I/O error, and disconnects the client socket. 1424 */ 1425 size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen) 1426 { 1427 Error *err = NULL; 1428 ssize_t ret; 1429 ret = qio_channel_write(vs->ioc, (const char *)data, datalen, &err); 1430 VNC_DEBUG("Wrote wire %p %zd -> %ld\n", data, datalen, ret); 1431 return vnc_client_io_error(vs, ret, err); 1432 } 1433 1434 1435 /* 1436 * Called to write buffered data to the client socket, when not 1437 * using any SASL SSF encryption layers. Will write as much data 1438 * as possible without blocking. If all buffered data is written, 1439 * will switch the FD poll() handler back to read monitoring. 1440 * 1441 * Returns the number of bytes written, which may be less than 1442 * the buffered output data if the socket would block. Returns 1443 * 0 on I/O error, and disconnects the client socket. 1444 */ 1445 static size_t vnc_client_write_plain(VncState *vs) 1446 { 1447 size_t offset; 1448 size_t ret; 1449 1450 #ifdef CONFIG_VNC_SASL 1451 VNC_DEBUG("Write Plain: Pending output %p size %zd offset %zd. Wait SSF %d\n", 1452 vs->output.buffer, vs->output.capacity, vs->output.offset, 1453 vs->sasl.waitWriteSSF); 1454 1455 if (vs->sasl.conn && 1456 vs->sasl.runSSF && 1457 vs->sasl.waitWriteSSF) { 1458 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->sasl.waitWriteSSF); 1459 if (ret) 1460 vs->sasl.waitWriteSSF -= ret; 1461 } else 1462 #endif /* CONFIG_VNC_SASL */ 1463 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->output.offset); 1464 if (!ret) 1465 return 0; 1466 1467 if (ret >= vs->force_update_offset) { 1468 if (vs->force_update_offset != 0) { 1469 trace_vnc_client_unthrottle_forced(vs, vs->ioc); 1470 } 1471 vs->force_update_offset = 0; 1472 } else { 1473 vs->force_update_offset -= ret; 1474 } 1475 offset = vs->output.offset; 1476 buffer_advance(&vs->output, ret); 1477 if (offset >= vs->throttle_output_offset && 1478 vs->output.offset < vs->throttle_output_offset) { 1479 trace_vnc_client_unthrottle_incremental(vs, vs->ioc, vs->output.offset); 1480 } 1481 1482 if (vs->output.offset == 0) { 1483 if (vs->ioc_tag) { 1484 g_source_remove(vs->ioc_tag); 1485 } 1486 vs->ioc_tag = qio_channel_add_watch( 1487 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 1488 vnc_client_io, vs, NULL); 1489 } 1490 1491 return ret; 1492 } 1493 1494 1495 /* 1496 * First function called whenever there is data to be written to 1497 * the client socket. Will delegate actual work according to whether 1498 * SASL SSF layers are enabled (thus requiring encryption calls) 1499 */ 1500 static void vnc_client_write_locked(VncState *vs) 1501 { 1502 #ifdef CONFIG_VNC_SASL 1503 if (vs->sasl.conn && 1504 vs->sasl.runSSF && 1505 !vs->sasl.waitWriteSSF) { 1506 vnc_client_write_sasl(vs); 1507 } else 1508 #endif /* CONFIG_VNC_SASL */ 1509 { 1510 vnc_client_write_plain(vs); 1511 } 1512 } 1513 1514 static void vnc_client_write(VncState *vs) 1515 { 1516 assert(vs->magic == VNC_MAGIC); 1517 vnc_lock_output(vs); 1518 if (vs->output.offset) { 1519 vnc_client_write_locked(vs); 1520 } else if (vs->ioc != NULL) { 1521 if (vs->ioc_tag) { 1522 g_source_remove(vs->ioc_tag); 1523 } 1524 vs->ioc_tag = qio_channel_add_watch( 1525 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 1526 vnc_client_io, vs, NULL); 1527 } 1528 vnc_unlock_output(vs); 1529 } 1530 1531 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting) 1532 { 1533 vs->read_handler = func; 1534 vs->read_handler_expect = expecting; 1535 } 1536 1537 1538 /* 1539 * Called to read a chunk of data from the client socket. The data may 1540 * be the raw data, or may need to be further decoded by SASL. 1541 * The data will be read either straight from to the socket, or 1542 * read via the GNUTLS wrappers, if TLS/SSL encryption is enabled 1543 * 1544 * NB, it is theoretically possible to have 2 layers of encryption, 1545 * both SASL, and this TLS layer. It is highly unlikely in practice 1546 * though, since SASL encryption will typically be a no-op if TLS 1547 * is active 1548 * 1549 * Returns the number of bytes read, which may be less than 1550 * the requested 'datalen' if the socket would block. Returns 1551 * 0 on I/O error or EOF, and disconnects the client socket. 1552 */ 1553 size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen) 1554 { 1555 ssize_t ret; 1556 Error *err = NULL; 1557 ret = qio_channel_read(vs->ioc, (char *)data, datalen, &err); 1558 VNC_DEBUG("Read wire %p %zd -> %ld\n", data, datalen, ret); 1559 return vnc_client_io_error(vs, ret, err); 1560 } 1561 1562 1563 /* 1564 * Called to read data from the client socket to the input buffer, 1565 * when not using any SASL SSF encryption layers. Will read as much 1566 * data as possible without blocking. 1567 * 1568 * Returns the number of bytes read, which may be less than 1569 * the requested 'datalen' if the socket would block. Returns 1570 * 0 on I/O error or EOF, and disconnects the client socket. 1571 */ 1572 static size_t vnc_client_read_plain(VncState *vs) 1573 { 1574 size_t ret; 1575 VNC_DEBUG("Read plain %p size %zd offset %zd\n", 1576 vs->input.buffer, vs->input.capacity, vs->input.offset); 1577 buffer_reserve(&vs->input, 4096); 1578 ret = vnc_client_read_buf(vs, buffer_end(&vs->input), 4096); 1579 if (!ret) 1580 return 0; 1581 vs->input.offset += ret; 1582 return ret; 1583 } 1584 1585 static void vnc_jobs_bh(void *opaque) 1586 { 1587 VncState *vs = opaque; 1588 1589 assert(vs->magic == VNC_MAGIC); 1590 vnc_jobs_consume_buffer(vs); 1591 } 1592 1593 /* 1594 * First function called whenever there is more data to be read from 1595 * the client socket. Will delegate actual work according to whether 1596 * SASL SSF layers are enabled (thus requiring decryption calls) 1597 * Returns 0 on success, -1 if client disconnected 1598 */ 1599 static int vnc_client_read(VncState *vs) 1600 { 1601 size_t ret; 1602 1603 #ifdef CONFIG_VNC_SASL 1604 if (vs->sasl.conn && vs->sasl.runSSF) 1605 ret = vnc_client_read_sasl(vs); 1606 else 1607 #endif /* CONFIG_VNC_SASL */ 1608 ret = vnc_client_read_plain(vs); 1609 if (!ret) { 1610 if (vs->disconnecting) { 1611 vnc_disconnect_finish(vs); 1612 return -1; 1613 } 1614 return 0; 1615 } 1616 1617 while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) { 1618 size_t len = vs->read_handler_expect; 1619 int ret; 1620 1621 ret = vs->read_handler(vs, vs->input.buffer, len); 1622 if (vs->disconnecting) { 1623 vnc_disconnect_finish(vs); 1624 return -1; 1625 } 1626 1627 if (!ret) { 1628 buffer_advance(&vs->input, len); 1629 } else { 1630 vs->read_handler_expect = ret; 1631 } 1632 } 1633 return 0; 1634 } 1635 1636 gboolean vnc_client_io(QIOChannel *ioc G_GNUC_UNUSED, 1637 GIOCondition condition, void *opaque) 1638 { 1639 VncState *vs = opaque; 1640 1641 assert(vs->magic == VNC_MAGIC); 1642 1643 if (condition & (G_IO_HUP | G_IO_ERR)) { 1644 vnc_disconnect_start(vs); 1645 return TRUE; 1646 } 1647 1648 if (condition & G_IO_IN) { 1649 if (vnc_client_read(vs) < 0) { 1650 /* vs is free()ed here */ 1651 return TRUE; 1652 } 1653 } 1654 if (condition & G_IO_OUT) { 1655 vnc_client_write(vs); 1656 } 1657 1658 if (vs->disconnecting) { 1659 if (vs->ioc_tag != 0) { 1660 g_source_remove(vs->ioc_tag); 1661 } 1662 vs->ioc_tag = 0; 1663 } 1664 return TRUE; 1665 } 1666 1667 1668 /* 1669 * Scale factor to apply to vs->throttle_output_offset when checking for 1670 * hard limit. Worst case normal usage could be x2, if we have a complete 1671 * incremental update and complete forced update in the output buffer. 1672 * So x3 should be good enough, but we pick x5 to be conservative and thus 1673 * (hopefully) never trigger incorrectly. 1674 */ 1675 #define VNC_THROTTLE_OUTPUT_LIMIT_SCALE 5 1676 1677 void vnc_write(VncState *vs, const void *data, size_t len) 1678 { 1679 assert(vs->magic == VNC_MAGIC); 1680 if (vs->disconnecting) { 1681 return; 1682 } 1683 /* Protection against malicious client/guest to prevent our output 1684 * buffer growing without bound if client stops reading data. This 1685 * should rarely trigger, because we have earlier throttling code 1686 * which stops issuing framebuffer updates and drops audio data 1687 * if the throttle_output_offset value is exceeded. So we only reach 1688 * this higher level if a huge number of pseudo-encodings get 1689 * triggered while data can't be sent on the socket. 1690 * 1691 * NB throttle_output_offset can be zero during early protocol 1692 * handshake, or from the job thread's VncState clone 1693 */ 1694 if (vs->throttle_output_offset != 0 && 1695 (vs->output.offset / VNC_THROTTLE_OUTPUT_LIMIT_SCALE) > 1696 vs->throttle_output_offset) { 1697 trace_vnc_client_output_limit(vs, vs->ioc, vs->output.offset, 1698 vs->throttle_output_offset); 1699 vnc_disconnect_start(vs); 1700 return; 1701 } 1702 buffer_reserve(&vs->output, len); 1703 1704 if (vs->ioc != NULL && buffer_empty(&vs->output)) { 1705 if (vs->ioc_tag) { 1706 g_source_remove(vs->ioc_tag); 1707 } 1708 vs->ioc_tag = qio_channel_add_watch( 1709 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_OUT, 1710 vnc_client_io, vs, NULL); 1711 } 1712 1713 buffer_append(&vs->output, data, len); 1714 } 1715 1716 void vnc_write_s32(VncState *vs, int32_t value) 1717 { 1718 vnc_write_u32(vs, *(uint32_t *)&value); 1719 } 1720 1721 void vnc_write_u32(VncState *vs, uint32_t value) 1722 { 1723 uint8_t buf[4]; 1724 1725 buf[0] = (value >> 24) & 0xFF; 1726 buf[1] = (value >> 16) & 0xFF; 1727 buf[2] = (value >> 8) & 0xFF; 1728 buf[3] = value & 0xFF; 1729 1730 vnc_write(vs, buf, 4); 1731 } 1732 1733 void vnc_write_u16(VncState *vs, uint16_t value) 1734 { 1735 uint8_t buf[2]; 1736 1737 buf[0] = (value >> 8) & 0xFF; 1738 buf[1] = value & 0xFF; 1739 1740 vnc_write(vs, buf, 2); 1741 } 1742 1743 void vnc_write_u8(VncState *vs, uint8_t value) 1744 { 1745 vnc_write(vs, (char *)&value, 1); 1746 } 1747 1748 void vnc_flush(VncState *vs) 1749 { 1750 vnc_lock_output(vs); 1751 if (vs->ioc != NULL && vs->output.offset) { 1752 vnc_client_write_locked(vs); 1753 } 1754 if (vs->disconnecting) { 1755 if (vs->ioc_tag != 0) { 1756 g_source_remove(vs->ioc_tag); 1757 } 1758 vs->ioc_tag = 0; 1759 } 1760 vnc_unlock_output(vs); 1761 } 1762 1763 static uint8_t read_u8(uint8_t *data, size_t offset) 1764 { 1765 return data[offset]; 1766 } 1767 1768 static uint16_t read_u16(uint8_t *data, size_t offset) 1769 { 1770 return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF); 1771 } 1772 1773 static int32_t read_s32(uint8_t *data, size_t offset) 1774 { 1775 return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) | 1776 (data[offset + 2] << 8) | data[offset + 3]); 1777 } 1778 1779 uint32_t read_u32(uint8_t *data, size_t offset) 1780 { 1781 return ((data[offset] << 24) | (data[offset + 1] << 16) | 1782 (data[offset + 2] << 8) | data[offset + 3]); 1783 } 1784 1785 static void check_pointer_type_change(Notifier *notifier, void *data) 1786 { 1787 VncState *vs = container_of(notifier, VncState, mouse_mode_notifier); 1788 int absolute = qemu_input_is_absolute(); 1789 1790 if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE) && vs->absolute != absolute) { 1791 vnc_lock_output(vs); 1792 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 1793 vnc_write_u8(vs, 0); 1794 vnc_write_u16(vs, 1); 1795 vnc_framebuffer_update(vs, absolute, 0, 1796 pixman_image_get_width(vs->vd->server), 1797 pixman_image_get_height(vs->vd->server), 1798 VNC_ENCODING_POINTER_TYPE_CHANGE); 1799 vnc_unlock_output(vs); 1800 vnc_flush(vs); 1801 } 1802 vs->absolute = absolute; 1803 } 1804 1805 static void pointer_event(VncState *vs, int button_mask, int x, int y) 1806 { 1807 static uint32_t bmap[INPUT_BUTTON__MAX] = { 1808 [INPUT_BUTTON_LEFT] = 0x01, 1809 [INPUT_BUTTON_MIDDLE] = 0x02, 1810 [INPUT_BUTTON_RIGHT] = 0x04, 1811 [INPUT_BUTTON_WHEEL_UP] = 0x08, 1812 [INPUT_BUTTON_WHEEL_DOWN] = 0x10, 1813 }; 1814 QemuConsole *con = vs->vd->dcl.con; 1815 int width = pixman_image_get_width(vs->vd->server); 1816 int height = pixman_image_get_height(vs->vd->server); 1817 1818 if (vs->last_bmask != button_mask) { 1819 qemu_input_update_buttons(con, bmap, vs->last_bmask, button_mask); 1820 vs->last_bmask = button_mask; 1821 } 1822 1823 if (vs->absolute) { 1824 qemu_input_queue_abs(con, INPUT_AXIS_X, x, 0, width); 1825 qemu_input_queue_abs(con, INPUT_AXIS_Y, y, 0, height); 1826 } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) { 1827 qemu_input_queue_rel(con, INPUT_AXIS_X, x - 0x7FFF); 1828 qemu_input_queue_rel(con, INPUT_AXIS_Y, y - 0x7FFF); 1829 } else { 1830 if (vs->last_x != -1) { 1831 qemu_input_queue_rel(con, INPUT_AXIS_X, x - vs->last_x); 1832 qemu_input_queue_rel(con, INPUT_AXIS_Y, y - vs->last_y); 1833 } 1834 vs->last_x = x; 1835 vs->last_y = y; 1836 } 1837 qemu_input_event_sync(); 1838 } 1839 1840 static void press_key(VncState *vs, QKeyCode qcode) 1841 { 1842 qkbd_state_key_event(vs->vd->kbd, qcode, true); 1843 qkbd_state_key_event(vs->vd->kbd, qcode, false); 1844 } 1845 1846 static void vnc_led_state_change(VncState *vs) 1847 { 1848 if (!vnc_has_feature(vs, VNC_FEATURE_LED_STATE)) { 1849 return; 1850 } 1851 1852 vnc_lock_output(vs); 1853 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 1854 vnc_write_u8(vs, 0); 1855 vnc_write_u16(vs, 1); 1856 vnc_framebuffer_update(vs, 0, 0, 1, 1, VNC_ENCODING_LED_STATE); 1857 vnc_write_u8(vs, vs->vd->ledstate); 1858 vnc_unlock_output(vs); 1859 vnc_flush(vs); 1860 } 1861 1862 static void kbd_leds(void *opaque, int ledstate) 1863 { 1864 VncDisplay *vd = opaque; 1865 VncState *client; 1866 1867 trace_vnc_key_guest_leds((ledstate & QEMU_CAPS_LOCK_LED), 1868 (ledstate & QEMU_NUM_LOCK_LED), 1869 (ledstate & QEMU_SCROLL_LOCK_LED)); 1870 1871 if (ledstate == vd->ledstate) { 1872 return; 1873 } 1874 1875 vd->ledstate = ledstate; 1876 1877 QTAILQ_FOREACH(client, &vd->clients, next) { 1878 vnc_led_state_change(client); 1879 } 1880 } 1881 1882 static void do_key_event(VncState *vs, int down, int keycode, int sym) 1883 { 1884 QKeyCode qcode = qemu_input_key_number_to_qcode(keycode); 1885 1886 /* QEMU console switch */ 1887 switch (qcode) { 1888 case Q_KEY_CODE_1 ... Q_KEY_CODE_9: /* '1' to '9' keys */ 1889 if (vs->vd->dcl.con == NULL && down && 1890 qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_CTRL) && 1891 qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_ALT)) { 1892 /* Reset the modifiers sent to the current console */ 1893 qkbd_state_lift_all_keys(vs->vd->kbd); 1894 console_select(qcode - Q_KEY_CODE_1); 1895 return; 1896 } 1897 default: 1898 break; 1899 } 1900 1901 /* Turn off the lock state sync logic if the client support the led 1902 state extension. 1903 */ 1904 if (down && vs->vd->lock_key_sync && 1905 !vnc_has_feature(vs, VNC_FEATURE_LED_STATE) && 1906 keycode_is_keypad(vs->vd->kbd_layout, keycode)) { 1907 /* If the numlock state needs to change then simulate an additional 1908 keypress before sending this one. This will happen if the user 1909 toggles numlock away from the VNC window. 1910 */ 1911 if (keysym_is_numlock(vs->vd->kbd_layout, sym & 0xFFFF)) { 1912 if (!qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_NUMLOCK)) { 1913 trace_vnc_key_sync_numlock(true); 1914 press_key(vs, Q_KEY_CODE_NUM_LOCK); 1915 } 1916 } else { 1917 if (qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_NUMLOCK)) { 1918 trace_vnc_key_sync_numlock(false); 1919 press_key(vs, Q_KEY_CODE_NUM_LOCK); 1920 } 1921 } 1922 } 1923 1924 if (down && vs->vd->lock_key_sync && 1925 !vnc_has_feature(vs, VNC_FEATURE_LED_STATE) && 1926 ((sym >= 'A' && sym <= 'Z') || (sym >= 'a' && sym <= 'z'))) { 1927 /* If the capslock state needs to change then simulate an additional 1928 keypress before sending this one. This will happen if the user 1929 toggles capslock away from the VNC window. 1930 */ 1931 int uppercase = !!(sym >= 'A' && sym <= 'Z'); 1932 bool shift = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_SHIFT); 1933 bool capslock = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_CAPSLOCK); 1934 if (capslock) { 1935 if (uppercase == shift) { 1936 trace_vnc_key_sync_capslock(false); 1937 press_key(vs, Q_KEY_CODE_CAPS_LOCK); 1938 } 1939 } else { 1940 if (uppercase != shift) { 1941 trace_vnc_key_sync_capslock(true); 1942 press_key(vs, Q_KEY_CODE_CAPS_LOCK); 1943 } 1944 } 1945 } 1946 1947 qkbd_state_key_event(vs->vd->kbd, qcode, down); 1948 if (!qemu_console_is_graphic(NULL)) { 1949 bool numlock = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_NUMLOCK); 1950 bool control = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_CTRL); 1951 /* QEMU console emulation */ 1952 if (down) { 1953 switch (keycode) { 1954 case 0x2a: /* Left Shift */ 1955 case 0x36: /* Right Shift */ 1956 case 0x1d: /* Left CTRL */ 1957 case 0x9d: /* Right CTRL */ 1958 case 0x38: /* Left ALT */ 1959 case 0xb8: /* Right ALT */ 1960 break; 1961 case 0xc8: 1962 kbd_put_keysym(QEMU_KEY_UP); 1963 break; 1964 case 0xd0: 1965 kbd_put_keysym(QEMU_KEY_DOWN); 1966 break; 1967 case 0xcb: 1968 kbd_put_keysym(QEMU_KEY_LEFT); 1969 break; 1970 case 0xcd: 1971 kbd_put_keysym(QEMU_KEY_RIGHT); 1972 break; 1973 case 0xd3: 1974 kbd_put_keysym(QEMU_KEY_DELETE); 1975 break; 1976 case 0xc7: 1977 kbd_put_keysym(QEMU_KEY_HOME); 1978 break; 1979 case 0xcf: 1980 kbd_put_keysym(QEMU_KEY_END); 1981 break; 1982 case 0xc9: 1983 kbd_put_keysym(QEMU_KEY_PAGEUP); 1984 break; 1985 case 0xd1: 1986 kbd_put_keysym(QEMU_KEY_PAGEDOWN); 1987 break; 1988 1989 case 0x47: 1990 kbd_put_keysym(numlock ? '7' : QEMU_KEY_HOME); 1991 break; 1992 case 0x48: 1993 kbd_put_keysym(numlock ? '8' : QEMU_KEY_UP); 1994 break; 1995 case 0x49: 1996 kbd_put_keysym(numlock ? '9' : QEMU_KEY_PAGEUP); 1997 break; 1998 case 0x4b: 1999 kbd_put_keysym(numlock ? '4' : QEMU_KEY_LEFT); 2000 break; 2001 case 0x4c: 2002 kbd_put_keysym('5'); 2003 break; 2004 case 0x4d: 2005 kbd_put_keysym(numlock ? '6' : QEMU_KEY_RIGHT); 2006 break; 2007 case 0x4f: 2008 kbd_put_keysym(numlock ? '1' : QEMU_KEY_END); 2009 break; 2010 case 0x50: 2011 kbd_put_keysym(numlock ? '2' : QEMU_KEY_DOWN); 2012 break; 2013 case 0x51: 2014 kbd_put_keysym(numlock ? '3' : QEMU_KEY_PAGEDOWN); 2015 break; 2016 case 0x52: 2017 kbd_put_keysym('0'); 2018 break; 2019 case 0x53: 2020 kbd_put_keysym(numlock ? '.' : QEMU_KEY_DELETE); 2021 break; 2022 2023 case 0xb5: 2024 kbd_put_keysym('/'); 2025 break; 2026 case 0x37: 2027 kbd_put_keysym('*'); 2028 break; 2029 case 0x4a: 2030 kbd_put_keysym('-'); 2031 break; 2032 case 0x4e: 2033 kbd_put_keysym('+'); 2034 break; 2035 case 0x9c: 2036 kbd_put_keysym('\n'); 2037 break; 2038 2039 default: 2040 if (control) { 2041 kbd_put_keysym(sym & 0x1f); 2042 } else { 2043 kbd_put_keysym(sym); 2044 } 2045 break; 2046 } 2047 } 2048 } 2049 } 2050 2051 static const char *code2name(int keycode) 2052 { 2053 return QKeyCode_str(qemu_input_key_number_to_qcode(keycode)); 2054 } 2055 2056 static void key_event(VncState *vs, int down, uint32_t sym) 2057 { 2058 int keycode; 2059 int lsym = sym; 2060 2061 if (lsym >= 'A' && lsym <= 'Z' && qemu_console_is_graphic(NULL)) { 2062 lsym = lsym - 'A' + 'a'; 2063 } 2064 2065 keycode = keysym2scancode(vs->vd->kbd_layout, lsym & 0xFFFF, 2066 vs->vd->kbd, down) & SCANCODE_KEYMASK; 2067 trace_vnc_key_event_map(down, sym, keycode, code2name(keycode)); 2068 do_key_event(vs, down, keycode, sym); 2069 } 2070 2071 static void ext_key_event(VncState *vs, int down, 2072 uint32_t sym, uint16_t keycode) 2073 { 2074 /* if the user specifies a keyboard layout, always use it */ 2075 if (keyboard_layout) { 2076 key_event(vs, down, sym); 2077 } else { 2078 trace_vnc_key_event_ext(down, sym, keycode, code2name(keycode)); 2079 do_key_event(vs, down, keycode, sym); 2080 } 2081 } 2082 2083 static void framebuffer_update_request(VncState *vs, int incremental, 2084 int x, int y, int w, int h) 2085 { 2086 if (incremental) { 2087 if (vs->update != VNC_STATE_UPDATE_FORCE) { 2088 vs->update = VNC_STATE_UPDATE_INCREMENTAL; 2089 } 2090 } else { 2091 vs->update = VNC_STATE_UPDATE_FORCE; 2092 vnc_set_area_dirty(vs->dirty, vs->vd, x, y, w, h); 2093 if (vnc_has_feature(vs, VNC_FEATURE_RESIZE_EXT)) { 2094 vnc_desktop_resize_ext(vs, 0); 2095 } 2096 } 2097 } 2098 2099 static void send_ext_key_event_ack(VncState *vs) 2100 { 2101 vnc_lock_output(vs); 2102 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 2103 vnc_write_u8(vs, 0); 2104 vnc_write_u16(vs, 1); 2105 vnc_framebuffer_update(vs, 0, 0, 2106 pixman_image_get_width(vs->vd->server), 2107 pixman_image_get_height(vs->vd->server), 2108 VNC_ENCODING_EXT_KEY_EVENT); 2109 vnc_unlock_output(vs); 2110 vnc_flush(vs); 2111 } 2112 2113 static void send_ext_audio_ack(VncState *vs) 2114 { 2115 vnc_lock_output(vs); 2116 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 2117 vnc_write_u8(vs, 0); 2118 vnc_write_u16(vs, 1); 2119 vnc_framebuffer_update(vs, 0, 0, 2120 pixman_image_get_width(vs->vd->server), 2121 pixman_image_get_height(vs->vd->server), 2122 VNC_ENCODING_AUDIO); 2123 vnc_unlock_output(vs); 2124 vnc_flush(vs); 2125 } 2126 2127 static void send_xvp_message(VncState *vs, int code) 2128 { 2129 vnc_lock_output(vs); 2130 vnc_write_u8(vs, VNC_MSG_SERVER_XVP); 2131 vnc_write_u8(vs, 0); /* pad */ 2132 vnc_write_u8(vs, 1); /* version */ 2133 vnc_write_u8(vs, code); 2134 vnc_unlock_output(vs); 2135 vnc_flush(vs); 2136 } 2137 2138 static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings) 2139 { 2140 int i; 2141 unsigned int enc = 0; 2142 2143 vs->features = 0; 2144 vs->vnc_encoding = 0; 2145 vs->tight->compression = 9; 2146 vs->tight->quality = -1; /* Lossless by default */ 2147 vs->absolute = -1; 2148 2149 /* 2150 * Start from the end because the encodings are sent in order of preference. 2151 * This way the preferred encoding (first encoding defined in the array) 2152 * will be set at the end of the loop. 2153 */ 2154 for (i = n_encodings - 1; i >= 0; i--) { 2155 enc = encodings[i]; 2156 switch (enc) { 2157 case VNC_ENCODING_RAW: 2158 vs->vnc_encoding = enc; 2159 break; 2160 case VNC_ENCODING_HEXTILE: 2161 vs->features |= VNC_FEATURE_HEXTILE_MASK; 2162 vs->vnc_encoding = enc; 2163 break; 2164 case VNC_ENCODING_TIGHT: 2165 vs->features |= VNC_FEATURE_TIGHT_MASK; 2166 vs->vnc_encoding = enc; 2167 break; 2168 #ifdef CONFIG_PNG 2169 case VNC_ENCODING_TIGHT_PNG: 2170 vs->features |= VNC_FEATURE_TIGHT_PNG_MASK; 2171 vs->vnc_encoding = enc; 2172 break; 2173 #endif 2174 case VNC_ENCODING_ZLIB: 2175 /* 2176 * VNC_ENCODING_ZRLE compresses better than VNC_ENCODING_ZLIB. 2177 * So prioritize ZRLE, even if the client hints that it prefers 2178 * ZLIB. 2179 */ 2180 if ((vs->features & VNC_FEATURE_ZRLE_MASK) == 0) { 2181 vs->features |= VNC_FEATURE_ZLIB_MASK; 2182 vs->vnc_encoding = enc; 2183 } 2184 break; 2185 case VNC_ENCODING_ZRLE: 2186 vs->features |= VNC_FEATURE_ZRLE_MASK; 2187 vs->vnc_encoding = enc; 2188 break; 2189 case VNC_ENCODING_ZYWRLE: 2190 vs->features |= VNC_FEATURE_ZYWRLE_MASK; 2191 vs->vnc_encoding = enc; 2192 break; 2193 case VNC_ENCODING_DESKTOPRESIZE: 2194 vs->features |= VNC_FEATURE_RESIZE_MASK; 2195 break; 2196 case VNC_ENCODING_DESKTOP_RESIZE_EXT: 2197 vs->features |= VNC_FEATURE_RESIZE_EXT_MASK; 2198 break; 2199 case VNC_ENCODING_POINTER_TYPE_CHANGE: 2200 vs->features |= VNC_FEATURE_POINTER_TYPE_CHANGE_MASK; 2201 break; 2202 case VNC_ENCODING_RICH_CURSOR: 2203 vs->features |= VNC_FEATURE_RICH_CURSOR_MASK; 2204 break; 2205 case VNC_ENCODING_ALPHA_CURSOR: 2206 vs->features |= VNC_FEATURE_ALPHA_CURSOR_MASK; 2207 break; 2208 case VNC_ENCODING_EXT_KEY_EVENT: 2209 send_ext_key_event_ack(vs); 2210 break; 2211 case VNC_ENCODING_AUDIO: 2212 send_ext_audio_ack(vs); 2213 break; 2214 case VNC_ENCODING_WMVi: 2215 vs->features |= VNC_FEATURE_WMVI_MASK; 2216 break; 2217 case VNC_ENCODING_LED_STATE: 2218 vs->features |= VNC_FEATURE_LED_STATE_MASK; 2219 break; 2220 case VNC_ENCODING_XVP: 2221 if (vs->vd->power_control) { 2222 vs->features |= VNC_FEATURE_XVP; 2223 send_xvp_message(vs, VNC_XVP_CODE_INIT); 2224 } 2225 break; 2226 case VNC_ENCODING_CLIPBOARD_EXT: 2227 vs->features |= VNC_FEATURE_CLIPBOARD_EXT_MASK; 2228 vnc_server_cut_text_caps(vs); 2229 break; 2230 case VNC_ENCODING_COMPRESSLEVEL0 ... VNC_ENCODING_COMPRESSLEVEL0 + 9: 2231 vs->tight->compression = (enc & 0x0F); 2232 break; 2233 case VNC_ENCODING_QUALITYLEVEL0 ... VNC_ENCODING_QUALITYLEVEL0 + 9: 2234 if (vs->vd->lossy) { 2235 vs->tight->quality = (enc & 0x0F); 2236 } 2237 break; 2238 default: 2239 VNC_DEBUG("Unknown encoding: %d (0x%.8x): %d\n", i, enc, enc); 2240 break; 2241 } 2242 } 2243 vnc_desktop_resize(vs); 2244 check_pointer_type_change(&vs->mouse_mode_notifier, NULL); 2245 vnc_led_state_change(vs); 2246 vnc_cursor_define(vs); 2247 } 2248 2249 static void set_pixel_conversion(VncState *vs) 2250 { 2251 pixman_format_code_t fmt = qemu_pixman_get_format(&vs->client_pf); 2252 2253 if (fmt == VNC_SERVER_FB_FORMAT) { 2254 vs->write_pixels = vnc_write_pixels_copy; 2255 vnc_hextile_set_pixel_conversion(vs, 0); 2256 } else { 2257 vs->write_pixels = vnc_write_pixels_generic; 2258 vnc_hextile_set_pixel_conversion(vs, 1); 2259 } 2260 } 2261 2262 static void send_color_map(VncState *vs) 2263 { 2264 int i; 2265 2266 vnc_lock_output(vs); 2267 vnc_write_u8(vs, VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES); 2268 vnc_write_u8(vs, 0); /* padding */ 2269 vnc_write_u16(vs, 0); /* first color */ 2270 vnc_write_u16(vs, 256); /* # of colors */ 2271 2272 for (i = 0; i < 256; i++) { 2273 PixelFormat *pf = &vs->client_pf; 2274 2275 vnc_write_u16(vs, (((i >> pf->rshift) & pf->rmax) << (16 - pf->rbits))); 2276 vnc_write_u16(vs, (((i >> pf->gshift) & pf->gmax) << (16 - pf->gbits))); 2277 vnc_write_u16(vs, (((i >> pf->bshift) & pf->bmax) << (16 - pf->bbits))); 2278 } 2279 vnc_unlock_output(vs); 2280 } 2281 2282 static void set_pixel_format(VncState *vs, int bits_per_pixel, 2283 int big_endian_flag, int true_color_flag, 2284 int red_max, int green_max, int blue_max, 2285 int red_shift, int green_shift, int blue_shift) 2286 { 2287 if (!true_color_flag) { 2288 /* Expose a reasonable default 256 color map */ 2289 bits_per_pixel = 8; 2290 red_max = 7; 2291 green_max = 7; 2292 blue_max = 3; 2293 red_shift = 0; 2294 green_shift = 3; 2295 blue_shift = 6; 2296 } 2297 2298 switch (bits_per_pixel) { 2299 case 8: 2300 case 16: 2301 case 32: 2302 break; 2303 default: 2304 vnc_client_error(vs); 2305 return; 2306 } 2307 2308 vs->client_pf.rmax = red_max ? red_max : 0xFF; 2309 vs->client_pf.rbits = ctpopl(red_max); 2310 vs->client_pf.rshift = red_shift; 2311 vs->client_pf.rmask = red_max << red_shift; 2312 vs->client_pf.gmax = green_max ? green_max : 0xFF; 2313 vs->client_pf.gbits = ctpopl(green_max); 2314 vs->client_pf.gshift = green_shift; 2315 vs->client_pf.gmask = green_max << green_shift; 2316 vs->client_pf.bmax = blue_max ? blue_max : 0xFF; 2317 vs->client_pf.bbits = ctpopl(blue_max); 2318 vs->client_pf.bshift = blue_shift; 2319 vs->client_pf.bmask = blue_max << blue_shift; 2320 vs->client_pf.bits_per_pixel = bits_per_pixel; 2321 vs->client_pf.bytes_per_pixel = bits_per_pixel / 8; 2322 vs->client_pf.depth = bits_per_pixel == 32 ? 24 : bits_per_pixel; 2323 vs->client_be = big_endian_flag; 2324 2325 if (!true_color_flag) { 2326 send_color_map(vs); 2327 } 2328 2329 set_pixel_conversion(vs); 2330 2331 graphic_hw_invalidate(vs->vd->dcl.con); 2332 graphic_hw_update(vs->vd->dcl.con); 2333 } 2334 2335 static void pixel_format_message (VncState *vs) { 2336 char pad[3] = { 0, 0, 0 }; 2337 2338 vs->client_pf = qemu_default_pixelformat(32); 2339 2340 vnc_write_u8(vs, vs->client_pf.bits_per_pixel); /* bits-per-pixel */ 2341 vnc_write_u8(vs, vs->client_pf.depth); /* depth */ 2342 2343 #if HOST_BIG_ENDIAN 2344 vnc_write_u8(vs, 1); /* big-endian-flag */ 2345 #else 2346 vnc_write_u8(vs, 0); /* big-endian-flag */ 2347 #endif 2348 vnc_write_u8(vs, 1); /* true-color-flag */ 2349 vnc_write_u16(vs, vs->client_pf.rmax); /* red-max */ 2350 vnc_write_u16(vs, vs->client_pf.gmax); /* green-max */ 2351 vnc_write_u16(vs, vs->client_pf.bmax); /* blue-max */ 2352 vnc_write_u8(vs, vs->client_pf.rshift); /* red-shift */ 2353 vnc_write_u8(vs, vs->client_pf.gshift); /* green-shift */ 2354 vnc_write_u8(vs, vs->client_pf.bshift); /* blue-shift */ 2355 vnc_write(vs, pad, 3); /* padding */ 2356 2357 vnc_hextile_set_pixel_conversion(vs, 0); 2358 vs->write_pixels = vnc_write_pixels_copy; 2359 } 2360 2361 static void vnc_colordepth(VncState *vs) 2362 { 2363 if (vnc_has_feature(vs, VNC_FEATURE_WMVI)) { 2364 /* Sending a WMVi message to notify the client*/ 2365 vnc_lock_output(vs); 2366 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 2367 vnc_write_u8(vs, 0); 2368 vnc_write_u16(vs, 1); /* number of rects */ 2369 vnc_framebuffer_update(vs, 0, 0, 2370 vs->client_width, 2371 vs->client_height, 2372 VNC_ENCODING_WMVi); 2373 pixel_format_message(vs); 2374 vnc_unlock_output(vs); 2375 vnc_flush(vs); 2376 } else { 2377 set_pixel_conversion(vs); 2378 } 2379 } 2380 2381 static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len) 2382 { 2383 int i; 2384 uint16_t limit; 2385 uint32_t freq; 2386 VncDisplay *vd = vs->vd; 2387 2388 if (data[0] > 3) { 2389 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); 2390 } 2391 2392 switch (data[0]) { 2393 case VNC_MSG_CLIENT_SET_PIXEL_FORMAT: 2394 if (len == 1) 2395 return 20; 2396 2397 set_pixel_format(vs, read_u8(data, 4), 2398 read_u8(data, 6), read_u8(data, 7), 2399 read_u16(data, 8), read_u16(data, 10), 2400 read_u16(data, 12), read_u8(data, 14), 2401 read_u8(data, 15), read_u8(data, 16)); 2402 break; 2403 case VNC_MSG_CLIENT_SET_ENCODINGS: 2404 if (len == 1) 2405 return 4; 2406 2407 if (len == 4) { 2408 limit = read_u16(data, 2); 2409 if (limit > 0) 2410 return 4 + (limit * 4); 2411 } else 2412 limit = read_u16(data, 2); 2413 2414 for (i = 0; i < limit; i++) { 2415 int32_t val = read_s32(data, 4 + (i * 4)); 2416 memcpy(data + 4 + (i * 4), &val, sizeof(val)); 2417 } 2418 2419 set_encodings(vs, (int32_t *)(data + 4), limit); 2420 break; 2421 case VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST: 2422 if (len == 1) 2423 return 10; 2424 2425 framebuffer_update_request(vs, 2426 read_u8(data, 1), read_u16(data, 2), read_u16(data, 4), 2427 read_u16(data, 6), read_u16(data, 8)); 2428 break; 2429 case VNC_MSG_CLIENT_KEY_EVENT: 2430 if (len == 1) 2431 return 8; 2432 2433 key_event(vs, read_u8(data, 1), read_u32(data, 4)); 2434 break; 2435 case VNC_MSG_CLIENT_POINTER_EVENT: 2436 if (len == 1) 2437 return 6; 2438 2439 pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4)); 2440 break; 2441 case VNC_MSG_CLIENT_CUT_TEXT: 2442 if (len == 1) { 2443 return 8; 2444 } 2445 if (len == 8) { 2446 uint32_t dlen = abs(read_s32(data, 4)); 2447 if (dlen > (1 << 20)) { 2448 error_report("vnc: client_cut_text msg payload has %u bytes" 2449 " which exceeds our limit of 1MB.", dlen); 2450 vnc_client_error(vs); 2451 break; 2452 } 2453 if (dlen > 0) { 2454 return 8 + dlen; 2455 } 2456 } 2457 2458 if (read_s32(data, 4) < 0) { 2459 vnc_client_cut_text_ext(vs, abs(read_s32(data, 4)), 2460 read_u32(data, 8), data + 12); 2461 break; 2462 } 2463 vnc_client_cut_text(vs, read_u32(data, 4), data + 8); 2464 break; 2465 case VNC_MSG_CLIENT_XVP: 2466 if (!(vs->features & VNC_FEATURE_XVP)) { 2467 error_report("vnc: xvp client message while disabled"); 2468 vnc_client_error(vs); 2469 break; 2470 } 2471 if (len == 1) { 2472 return 4; 2473 } 2474 if (len == 4) { 2475 uint8_t version = read_u8(data, 2); 2476 uint8_t action = read_u8(data, 3); 2477 2478 if (version != 1) { 2479 error_report("vnc: xvp client message version %d != 1", 2480 version); 2481 vnc_client_error(vs); 2482 break; 2483 } 2484 2485 switch (action) { 2486 case VNC_XVP_ACTION_SHUTDOWN: 2487 qemu_system_powerdown_request(); 2488 break; 2489 case VNC_XVP_ACTION_REBOOT: 2490 send_xvp_message(vs, VNC_XVP_CODE_FAIL); 2491 break; 2492 case VNC_XVP_ACTION_RESET: 2493 qemu_system_reset_request(SHUTDOWN_CAUSE_HOST_QMP_SYSTEM_RESET); 2494 break; 2495 default: 2496 send_xvp_message(vs, VNC_XVP_CODE_FAIL); 2497 break; 2498 } 2499 } 2500 break; 2501 case VNC_MSG_CLIENT_QEMU: 2502 if (len == 1) 2503 return 2; 2504 2505 switch (read_u8(data, 1)) { 2506 case VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT: 2507 if (len == 2) 2508 return 12; 2509 2510 ext_key_event(vs, read_u16(data, 2), 2511 read_u32(data, 4), read_u32(data, 8)); 2512 break; 2513 case VNC_MSG_CLIENT_QEMU_AUDIO: 2514 if (len == 2) 2515 return 4; 2516 2517 switch (read_u16 (data, 2)) { 2518 case VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE: 2519 trace_vnc_msg_client_audio_enable(vs, vs->ioc); 2520 audio_add(vs); 2521 break; 2522 case VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE: 2523 trace_vnc_msg_client_audio_disable(vs, vs->ioc); 2524 audio_del(vs); 2525 break; 2526 case VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT: 2527 if (len == 4) 2528 return 10; 2529 switch (read_u8(data, 4)) { 2530 case 0: vs->as.fmt = AUDIO_FORMAT_U8; break; 2531 case 1: vs->as.fmt = AUDIO_FORMAT_S8; break; 2532 case 2: vs->as.fmt = AUDIO_FORMAT_U16; break; 2533 case 3: vs->as.fmt = AUDIO_FORMAT_S16; break; 2534 case 4: vs->as.fmt = AUDIO_FORMAT_U32; break; 2535 case 5: vs->as.fmt = AUDIO_FORMAT_S32; break; 2536 default: 2537 VNC_DEBUG("Invalid audio format %d\n", read_u8(data, 4)); 2538 vnc_client_error(vs); 2539 break; 2540 } 2541 vs->as.nchannels = read_u8(data, 5); 2542 if (vs->as.nchannels != 1 && vs->as.nchannels != 2) { 2543 VNC_DEBUG("Invalid audio channel count %d\n", 2544 read_u8(data, 5)); 2545 vnc_client_error(vs); 2546 break; 2547 } 2548 freq = read_u32(data, 6); 2549 /* No official limit for protocol, but 48khz is a sensible 2550 * upper bound for trustworthy clients, and this limit 2551 * protects calculations involving 'vs->as.freq' later. 2552 */ 2553 if (freq > 48000) { 2554 VNC_DEBUG("Invalid audio frequency %u > 48000", freq); 2555 vnc_client_error(vs); 2556 break; 2557 } 2558 vs->as.freq = freq; 2559 trace_vnc_msg_client_audio_format( 2560 vs, vs->ioc, vs->as.fmt, vs->as.nchannels, vs->as.freq); 2561 break; 2562 default: 2563 VNC_DEBUG("Invalid audio message %d\n", read_u8(data, 4)); 2564 vnc_client_error(vs); 2565 break; 2566 } 2567 break; 2568 2569 default: 2570 VNC_DEBUG("Msg: %d\n", read_u16(data, 0)); 2571 vnc_client_error(vs); 2572 break; 2573 } 2574 break; 2575 case VNC_MSG_CLIENT_SET_DESKTOP_SIZE: 2576 { 2577 size_t size; 2578 uint8_t screens; 2579 int w, h; 2580 2581 if (len < 8) { 2582 return 8; 2583 } 2584 2585 screens = read_u8(data, 6); 2586 size = 8 + screens * 16; 2587 if (len < size) { 2588 return size; 2589 } 2590 w = read_u16(data, 2); 2591 h = read_u16(data, 4); 2592 2593 trace_vnc_msg_client_set_desktop_size(vs, vs->ioc, w, h, screens); 2594 if (dpy_ui_info_supported(vs->vd->dcl.con)) { 2595 QemuUIInfo info; 2596 memset(&info, 0, sizeof(info)); 2597 info.width = w; 2598 info.height = h; 2599 dpy_set_ui_info(vs->vd->dcl.con, &info, false); 2600 vnc_desktop_resize_ext(vs, 4 /* Request forwarded */); 2601 } else { 2602 vnc_desktop_resize_ext(vs, 3 /* Invalid screen layout */); 2603 } 2604 2605 break; 2606 } 2607 default: 2608 VNC_DEBUG("Msg: %d\n", data[0]); 2609 vnc_client_error(vs); 2610 break; 2611 } 2612 2613 vnc_update_throttle_offset(vs); 2614 vnc_read_when(vs, protocol_client_msg, 1); 2615 return 0; 2616 } 2617 2618 static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) 2619 { 2620 char buf[1024]; 2621 VncShareMode mode; 2622 int size; 2623 2624 mode = data[0] ? VNC_SHARE_MODE_SHARED : VNC_SHARE_MODE_EXCLUSIVE; 2625 switch (vs->vd->share_policy) { 2626 case VNC_SHARE_POLICY_IGNORE: 2627 /* 2628 * Ignore the shared flag. Nothing to do here. 2629 * 2630 * Doesn't conform to the rfb spec but is traditional qemu 2631 * behavior, thus left here as option for compatibility 2632 * reasons. 2633 */ 2634 break; 2635 case VNC_SHARE_POLICY_ALLOW_EXCLUSIVE: 2636 /* 2637 * Policy: Allow clients ask for exclusive access. 2638 * 2639 * Implementation: When a client asks for exclusive access, 2640 * disconnect all others. Shared connects are allowed as long 2641 * as no exclusive connection exists. 2642 * 2643 * This is how the rfb spec suggests to handle the shared flag. 2644 */ 2645 if (mode == VNC_SHARE_MODE_EXCLUSIVE) { 2646 VncState *client; 2647 QTAILQ_FOREACH(client, &vs->vd->clients, next) { 2648 if (vs == client) { 2649 continue; 2650 } 2651 if (client->share_mode != VNC_SHARE_MODE_EXCLUSIVE && 2652 client->share_mode != VNC_SHARE_MODE_SHARED) { 2653 continue; 2654 } 2655 vnc_disconnect_start(client); 2656 } 2657 } 2658 if (mode == VNC_SHARE_MODE_SHARED) { 2659 if (vs->vd->num_exclusive > 0) { 2660 vnc_disconnect_start(vs); 2661 return 0; 2662 } 2663 } 2664 break; 2665 case VNC_SHARE_POLICY_FORCE_SHARED: 2666 /* 2667 * Policy: Shared connects only. 2668 * Implementation: Disallow clients asking for exclusive access. 2669 * 2670 * Useful for shared desktop sessions where you don't want 2671 * someone forgetting to say -shared when running the vnc 2672 * client disconnect everybody else. 2673 */ 2674 if (mode == VNC_SHARE_MODE_EXCLUSIVE) { 2675 vnc_disconnect_start(vs); 2676 return 0; 2677 } 2678 break; 2679 } 2680 vnc_set_share_mode(vs, mode); 2681 2682 if (vs->vd->num_shared > vs->vd->connections_limit) { 2683 vnc_disconnect_start(vs); 2684 return 0; 2685 } 2686 2687 assert(pixman_image_get_width(vs->vd->server) < 65536 && 2688 pixman_image_get_width(vs->vd->server) >= 0); 2689 assert(pixman_image_get_height(vs->vd->server) < 65536 && 2690 pixman_image_get_height(vs->vd->server) >= 0); 2691 vs->client_width = pixman_image_get_width(vs->vd->server); 2692 vs->client_height = pixman_image_get_height(vs->vd->server); 2693 vnc_write_u16(vs, vs->client_width); 2694 vnc_write_u16(vs, vs->client_height); 2695 2696 pixel_format_message(vs); 2697 2698 if (qemu_name) { 2699 size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name); 2700 if (size > sizeof(buf)) { 2701 size = sizeof(buf); 2702 } 2703 } else { 2704 size = snprintf(buf, sizeof(buf), "QEMU"); 2705 } 2706 2707 vnc_write_u32(vs, size); 2708 vnc_write(vs, buf, size); 2709 vnc_flush(vs); 2710 2711 vnc_client_cache_auth(vs); 2712 vnc_qmp_event(vs, QAPI_EVENT_VNC_INITIALIZED); 2713 2714 vnc_read_when(vs, protocol_client_msg, 1); 2715 2716 return 0; 2717 } 2718 2719 void start_client_init(VncState *vs) 2720 { 2721 vnc_read_when(vs, protocol_client_init, 1); 2722 } 2723 2724 static void authentication_failed(VncState *vs) 2725 { 2726 vnc_write_u32(vs, 1); /* Reject auth */ 2727 if (vs->minor >= 8) { 2728 static const char err[] = "Authentication failed"; 2729 vnc_write_u32(vs, sizeof(err)); 2730 vnc_write(vs, err, sizeof(err)); 2731 } 2732 vnc_flush(vs); 2733 vnc_client_error(vs); 2734 } 2735 2736 static void 2737 vnc_munge_des_rfb_key(unsigned char *key, size_t nkey) 2738 { 2739 size_t i; 2740 for (i = 0; i < nkey; i++) { 2741 uint8_t r = key[i]; 2742 r = (r & 0xf0) >> 4 | (r & 0x0f) << 4; 2743 r = (r & 0xcc) >> 2 | (r & 0x33) << 2; 2744 r = (r & 0xaa) >> 1 | (r & 0x55) << 1; 2745 key[i] = r; 2746 } 2747 } 2748 2749 static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len) 2750 { 2751 unsigned char response[VNC_AUTH_CHALLENGE_SIZE]; 2752 size_t i, pwlen; 2753 unsigned char key[8]; 2754 time_t now = time(NULL); 2755 QCryptoCipher *cipher = NULL; 2756 Error *err = NULL; 2757 2758 if (!vs->vd->password) { 2759 trace_vnc_auth_fail(vs, vs->auth, "password is not set", ""); 2760 goto reject; 2761 } 2762 if (vs->vd->expires < now) { 2763 trace_vnc_auth_fail(vs, vs->auth, "password is expired", ""); 2764 goto reject; 2765 } 2766 2767 memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE); 2768 2769 /* Calculate the expected challenge response */ 2770 pwlen = strlen(vs->vd->password); 2771 for (i=0; i<sizeof(key); i++) 2772 key[i] = i<pwlen ? vs->vd->password[i] : 0; 2773 vnc_munge_des_rfb_key(key, sizeof(key)); 2774 2775 cipher = qcrypto_cipher_new( 2776 QCRYPTO_CIPHER_ALG_DES, 2777 QCRYPTO_CIPHER_MODE_ECB, 2778 key, G_N_ELEMENTS(key), 2779 &err); 2780 if (!cipher) { 2781 trace_vnc_auth_fail(vs, vs->auth, "cannot create cipher", 2782 error_get_pretty(err)); 2783 error_free(err); 2784 goto reject; 2785 } 2786 2787 if (qcrypto_cipher_encrypt(cipher, 2788 vs->challenge, 2789 response, 2790 VNC_AUTH_CHALLENGE_SIZE, 2791 &err) < 0) { 2792 trace_vnc_auth_fail(vs, vs->auth, "cannot encrypt challenge response", 2793 error_get_pretty(err)); 2794 error_free(err); 2795 goto reject; 2796 } 2797 2798 /* Compare expected vs actual challenge response */ 2799 if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) { 2800 trace_vnc_auth_fail(vs, vs->auth, "mis-matched challenge response", ""); 2801 goto reject; 2802 } else { 2803 trace_vnc_auth_pass(vs, vs->auth); 2804 vnc_write_u32(vs, 0); /* Accept auth */ 2805 vnc_flush(vs); 2806 2807 start_client_init(vs); 2808 } 2809 2810 qcrypto_cipher_free(cipher); 2811 return 0; 2812 2813 reject: 2814 authentication_failed(vs); 2815 qcrypto_cipher_free(cipher); 2816 return 0; 2817 } 2818 2819 void start_auth_vnc(VncState *vs) 2820 { 2821 Error *err = NULL; 2822 2823 if (qcrypto_random_bytes(vs->challenge, sizeof(vs->challenge), &err)) { 2824 trace_vnc_auth_fail(vs, vs->auth, "cannot get random bytes", 2825 error_get_pretty(err)); 2826 error_free(err); 2827 authentication_failed(vs); 2828 return; 2829 } 2830 2831 /* Send client a 'random' challenge */ 2832 vnc_write(vs, vs->challenge, sizeof(vs->challenge)); 2833 vnc_flush(vs); 2834 2835 vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge)); 2836 } 2837 2838 2839 static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len) 2840 { 2841 /* We only advertise 1 auth scheme at a time, so client 2842 * must pick the one we sent. Verify this */ 2843 if (data[0] != vs->auth) { /* Reject auth */ 2844 trace_vnc_auth_reject(vs, vs->auth, (int)data[0]); 2845 authentication_failed(vs); 2846 } else { /* Accept requested auth */ 2847 trace_vnc_auth_start(vs, vs->auth); 2848 switch (vs->auth) { 2849 case VNC_AUTH_NONE: 2850 if (vs->minor >= 8) { 2851 vnc_write_u32(vs, 0); /* Accept auth completion */ 2852 vnc_flush(vs); 2853 } 2854 trace_vnc_auth_pass(vs, vs->auth); 2855 start_client_init(vs); 2856 break; 2857 2858 case VNC_AUTH_VNC: 2859 start_auth_vnc(vs); 2860 break; 2861 2862 case VNC_AUTH_VENCRYPT: 2863 start_auth_vencrypt(vs); 2864 break; 2865 2866 #ifdef CONFIG_VNC_SASL 2867 case VNC_AUTH_SASL: 2868 start_auth_sasl(vs); 2869 break; 2870 #endif /* CONFIG_VNC_SASL */ 2871 2872 default: /* Should not be possible, but just in case */ 2873 trace_vnc_auth_fail(vs, vs->auth, "Unhandled auth method", ""); 2874 authentication_failed(vs); 2875 } 2876 } 2877 return 0; 2878 } 2879 2880 static int protocol_version(VncState *vs, uint8_t *version, size_t len) 2881 { 2882 char local[13]; 2883 2884 memcpy(local, version, 12); 2885 local[12] = 0; 2886 2887 if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) { 2888 VNC_DEBUG("Malformed protocol version %s\n", local); 2889 vnc_client_error(vs); 2890 return 0; 2891 } 2892 VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor); 2893 if (vs->major != 3 || 2894 (vs->minor != 3 && 2895 vs->minor != 4 && 2896 vs->minor != 5 && 2897 vs->minor != 7 && 2898 vs->minor != 8)) { 2899 VNC_DEBUG("Unsupported client version\n"); 2900 vnc_write_u32(vs, VNC_AUTH_INVALID); 2901 vnc_flush(vs); 2902 vnc_client_error(vs); 2903 return 0; 2904 } 2905 /* Some broken clients report v3.4 or v3.5, which spec requires to be treated 2906 * as equivalent to v3.3 by servers 2907 */ 2908 if (vs->minor == 4 || vs->minor == 5) 2909 vs->minor = 3; 2910 2911 if (vs->minor == 3) { 2912 trace_vnc_auth_start(vs, vs->auth); 2913 if (vs->auth == VNC_AUTH_NONE) { 2914 vnc_write_u32(vs, vs->auth); 2915 vnc_flush(vs); 2916 trace_vnc_auth_pass(vs, vs->auth); 2917 start_client_init(vs); 2918 } else if (vs->auth == VNC_AUTH_VNC) { 2919 VNC_DEBUG("Tell client VNC auth\n"); 2920 vnc_write_u32(vs, vs->auth); 2921 vnc_flush(vs); 2922 start_auth_vnc(vs); 2923 } else { 2924 trace_vnc_auth_fail(vs, vs->auth, 2925 "Unsupported auth method for v3.3", ""); 2926 vnc_write_u32(vs, VNC_AUTH_INVALID); 2927 vnc_flush(vs); 2928 vnc_client_error(vs); 2929 } 2930 } else { 2931 vnc_write_u8(vs, 1); /* num auth */ 2932 vnc_write_u8(vs, vs->auth); 2933 vnc_read_when(vs, protocol_client_auth, 1); 2934 vnc_flush(vs); 2935 } 2936 2937 return 0; 2938 } 2939 2940 static VncRectStat *vnc_stat_rect(VncDisplay *vd, int x, int y) 2941 { 2942 struct VncSurface *vs = &vd->guest; 2943 2944 return &vs->stats[y / VNC_STAT_RECT][x / VNC_STAT_RECT]; 2945 } 2946 2947 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h) 2948 { 2949 int i, j; 2950 2951 w = (x + w) / VNC_STAT_RECT; 2952 h = (y + h) / VNC_STAT_RECT; 2953 x /= VNC_STAT_RECT; 2954 y /= VNC_STAT_RECT; 2955 2956 for (j = y; j <= h; j++) { 2957 for (i = x; i <= w; i++) { 2958 vs->lossy_rect[j][i] = 1; 2959 } 2960 } 2961 } 2962 2963 static int vnc_refresh_lossy_rect(VncDisplay *vd, int x, int y) 2964 { 2965 VncState *vs; 2966 int sty = y / VNC_STAT_RECT; 2967 int stx = x / VNC_STAT_RECT; 2968 int has_dirty = 0; 2969 2970 y = QEMU_ALIGN_DOWN(y, VNC_STAT_RECT); 2971 x = QEMU_ALIGN_DOWN(x, VNC_STAT_RECT); 2972 2973 QTAILQ_FOREACH(vs, &vd->clients, next) { 2974 int j; 2975 2976 /* kernel send buffers are full -> refresh later */ 2977 if (vs->output.offset) { 2978 continue; 2979 } 2980 2981 if (!vs->lossy_rect[sty][stx]) { 2982 continue; 2983 } 2984 2985 vs->lossy_rect[sty][stx] = 0; 2986 for (j = 0; j < VNC_STAT_RECT; ++j) { 2987 bitmap_set(vs->dirty[y + j], 2988 x / VNC_DIRTY_PIXELS_PER_BIT, 2989 VNC_STAT_RECT / VNC_DIRTY_PIXELS_PER_BIT); 2990 } 2991 has_dirty++; 2992 } 2993 2994 return has_dirty; 2995 } 2996 2997 static int vnc_update_stats(VncDisplay *vd, struct timeval * tv) 2998 { 2999 int width = MIN(pixman_image_get_width(vd->guest.fb), 3000 pixman_image_get_width(vd->server)); 3001 int height = MIN(pixman_image_get_height(vd->guest.fb), 3002 pixman_image_get_height(vd->server)); 3003 int x, y; 3004 struct timeval res; 3005 int has_dirty = 0; 3006 3007 for (y = 0; y < height; y += VNC_STAT_RECT) { 3008 for (x = 0; x < width; x += VNC_STAT_RECT) { 3009 VncRectStat *rect = vnc_stat_rect(vd, x, y); 3010 3011 rect->updated = false; 3012 } 3013 } 3014 3015 qemu_timersub(tv, &VNC_REFRESH_STATS, &res); 3016 3017 if (timercmp(&vd->guest.last_freq_check, &res, >)) { 3018 return has_dirty; 3019 } 3020 vd->guest.last_freq_check = *tv; 3021 3022 for (y = 0; y < height; y += VNC_STAT_RECT) { 3023 for (x = 0; x < width; x += VNC_STAT_RECT) { 3024 VncRectStat *rect= vnc_stat_rect(vd, x, y); 3025 int count = ARRAY_SIZE(rect->times); 3026 struct timeval min, max; 3027 3028 if (!timerisset(&rect->times[count - 1])) { 3029 continue ; 3030 } 3031 3032 max = rect->times[(rect->idx + count - 1) % count]; 3033 qemu_timersub(tv, &max, &res); 3034 3035 if (timercmp(&res, &VNC_REFRESH_LOSSY, >)) { 3036 rect->freq = 0; 3037 has_dirty += vnc_refresh_lossy_rect(vd, x, y); 3038 memset(rect->times, 0, sizeof (rect->times)); 3039 continue ; 3040 } 3041 3042 min = rect->times[rect->idx]; 3043 max = rect->times[(rect->idx + count - 1) % count]; 3044 qemu_timersub(&max, &min, &res); 3045 3046 rect->freq = res.tv_sec + res.tv_usec / 1000000.; 3047 rect->freq /= count; 3048 rect->freq = 1. / rect->freq; 3049 } 3050 } 3051 return has_dirty; 3052 } 3053 3054 double vnc_update_freq(VncState *vs, int x, int y, int w, int h) 3055 { 3056 int i, j; 3057 double total = 0; 3058 int num = 0; 3059 3060 x = QEMU_ALIGN_DOWN(x, VNC_STAT_RECT); 3061 y = QEMU_ALIGN_DOWN(y, VNC_STAT_RECT); 3062 3063 for (j = y; j <= y + h; j += VNC_STAT_RECT) { 3064 for (i = x; i <= x + w; i += VNC_STAT_RECT) { 3065 total += vnc_stat_rect(vs->vd, i, j)->freq; 3066 num++; 3067 } 3068 } 3069 3070 if (num) { 3071 return total / num; 3072 } else { 3073 return 0; 3074 } 3075 } 3076 3077 static void vnc_rect_updated(VncDisplay *vd, int x, int y, struct timeval * tv) 3078 { 3079 VncRectStat *rect; 3080 3081 rect = vnc_stat_rect(vd, x, y); 3082 if (rect->updated) { 3083 return ; 3084 } 3085 rect->times[rect->idx] = *tv; 3086 rect->idx = (rect->idx + 1) % ARRAY_SIZE(rect->times); 3087 rect->updated = true; 3088 } 3089 3090 static int vnc_refresh_server_surface(VncDisplay *vd) 3091 { 3092 int width = MIN(pixman_image_get_width(vd->guest.fb), 3093 pixman_image_get_width(vd->server)); 3094 int height = MIN(pixman_image_get_height(vd->guest.fb), 3095 pixman_image_get_height(vd->server)); 3096 int cmp_bytes, server_stride, line_bytes, guest_ll, guest_stride, y = 0; 3097 uint8_t *guest_row0 = NULL, *server_row0; 3098 VncState *vs; 3099 int has_dirty = 0; 3100 pixman_image_t *tmpbuf = NULL; 3101 unsigned long offset; 3102 int x; 3103 uint8_t *guest_ptr, *server_ptr; 3104 3105 struct timeval tv = { 0, 0 }; 3106 3107 if (!vd->non_adaptive) { 3108 gettimeofday(&tv, NULL); 3109 has_dirty = vnc_update_stats(vd, &tv); 3110 } 3111 3112 offset = find_next_bit((unsigned long *) &vd->guest.dirty, 3113 height * VNC_DIRTY_BPL(&vd->guest), 0); 3114 if (offset == height * VNC_DIRTY_BPL(&vd->guest)) { 3115 /* no dirty bits in guest surface */ 3116 return has_dirty; 3117 } 3118 3119 /* 3120 * Walk through the guest dirty map. 3121 * Check and copy modified bits from guest to server surface. 3122 * Update server dirty map. 3123 */ 3124 server_row0 = (uint8_t *)pixman_image_get_data(vd->server); 3125 server_stride = guest_stride = guest_ll = 3126 pixman_image_get_stride(vd->server); 3127 cmp_bytes = MIN(VNC_DIRTY_PIXELS_PER_BIT * VNC_SERVER_FB_BYTES, 3128 server_stride); 3129 if (vd->guest.format != VNC_SERVER_FB_FORMAT) { 3130 int width = pixman_image_get_width(vd->server); 3131 tmpbuf = qemu_pixman_linebuf_create(VNC_SERVER_FB_FORMAT, width); 3132 } else { 3133 int guest_bpp = 3134 PIXMAN_FORMAT_BPP(pixman_image_get_format(vd->guest.fb)); 3135 guest_row0 = (uint8_t *)pixman_image_get_data(vd->guest.fb); 3136 guest_stride = pixman_image_get_stride(vd->guest.fb); 3137 guest_ll = pixman_image_get_width(vd->guest.fb) 3138 * DIV_ROUND_UP(guest_bpp, 8); 3139 } 3140 line_bytes = MIN(server_stride, guest_ll); 3141 3142 for (;;) { 3143 y = offset / VNC_DIRTY_BPL(&vd->guest); 3144 x = offset % VNC_DIRTY_BPL(&vd->guest); 3145 3146 server_ptr = server_row0 + y * server_stride + x * cmp_bytes; 3147 3148 if (vd->guest.format != VNC_SERVER_FB_FORMAT) { 3149 qemu_pixman_linebuf_fill(tmpbuf, vd->guest.fb, width, 0, y); 3150 guest_ptr = (uint8_t *)pixman_image_get_data(tmpbuf); 3151 } else { 3152 guest_ptr = guest_row0 + y * guest_stride; 3153 } 3154 guest_ptr += x * cmp_bytes; 3155 3156 for (; x < DIV_ROUND_UP(width, VNC_DIRTY_PIXELS_PER_BIT); 3157 x++, guest_ptr += cmp_bytes, server_ptr += cmp_bytes) { 3158 int _cmp_bytes = cmp_bytes; 3159 if (!test_and_clear_bit(x, vd->guest.dirty[y])) { 3160 continue; 3161 } 3162 if ((x + 1) * cmp_bytes > line_bytes) { 3163 _cmp_bytes = line_bytes - x * cmp_bytes; 3164 } 3165 assert(_cmp_bytes >= 0); 3166 if (memcmp(server_ptr, guest_ptr, _cmp_bytes) == 0) { 3167 continue; 3168 } 3169 memcpy(server_ptr, guest_ptr, _cmp_bytes); 3170 if (!vd->non_adaptive) { 3171 vnc_rect_updated(vd, x * VNC_DIRTY_PIXELS_PER_BIT, 3172 y, &tv); 3173 } 3174 QTAILQ_FOREACH(vs, &vd->clients, next) { 3175 set_bit(x, vs->dirty[y]); 3176 } 3177 has_dirty++; 3178 } 3179 3180 y++; 3181 offset = find_next_bit((unsigned long *) &vd->guest.dirty, 3182 height * VNC_DIRTY_BPL(&vd->guest), 3183 y * VNC_DIRTY_BPL(&vd->guest)); 3184 if (offset == height * VNC_DIRTY_BPL(&vd->guest)) { 3185 /* no more dirty bits */ 3186 break; 3187 } 3188 } 3189 qemu_pixman_image_unref(tmpbuf); 3190 return has_dirty; 3191 } 3192 3193 static void vnc_refresh(DisplayChangeListener *dcl) 3194 { 3195 VncDisplay *vd = container_of(dcl, VncDisplay, dcl); 3196 VncState *vs, *vn; 3197 int has_dirty, rects = 0; 3198 3199 if (QTAILQ_EMPTY(&vd->clients)) { 3200 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_MAX); 3201 return; 3202 } 3203 3204 graphic_hw_update(vd->dcl.con); 3205 3206 if (vnc_trylock_display(vd)) { 3207 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); 3208 return; 3209 } 3210 3211 has_dirty = vnc_refresh_server_surface(vd); 3212 vnc_unlock_display(vd); 3213 3214 QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) { 3215 rects += vnc_update_client(vs, has_dirty); 3216 /* vs might be free()ed here */ 3217 } 3218 3219 if (has_dirty && rects) { 3220 vd->dcl.update_interval /= 2; 3221 if (vd->dcl.update_interval < VNC_REFRESH_INTERVAL_BASE) { 3222 vd->dcl.update_interval = VNC_REFRESH_INTERVAL_BASE; 3223 } 3224 } else { 3225 vd->dcl.update_interval += VNC_REFRESH_INTERVAL_INC; 3226 if (vd->dcl.update_interval > VNC_REFRESH_INTERVAL_MAX) { 3227 vd->dcl.update_interval = VNC_REFRESH_INTERVAL_MAX; 3228 } 3229 } 3230 } 3231 3232 static void vnc_connect(VncDisplay *vd, QIOChannelSocket *sioc, 3233 bool skipauth, bool websocket) 3234 { 3235 VncState *vs = g_new0(VncState, 1); 3236 bool first_client = QTAILQ_EMPTY(&vd->clients); 3237 int i; 3238 3239 trace_vnc_client_connect(vs, sioc); 3240 vs->zrle = g_new0(VncZrle, 1); 3241 vs->tight = g_new0(VncTight, 1); 3242 vs->magic = VNC_MAGIC; 3243 vs->sioc = sioc; 3244 object_ref(OBJECT(vs->sioc)); 3245 vs->ioc = QIO_CHANNEL(sioc); 3246 object_ref(OBJECT(vs->ioc)); 3247 vs->vd = vd; 3248 3249 buffer_init(&vs->input, "vnc-input/%p", sioc); 3250 buffer_init(&vs->output, "vnc-output/%p", sioc); 3251 buffer_init(&vs->jobs_buffer, "vnc-jobs_buffer/%p", sioc); 3252 3253 buffer_init(&vs->tight->tight, "vnc-tight/%p", sioc); 3254 buffer_init(&vs->tight->zlib, "vnc-tight-zlib/%p", sioc); 3255 buffer_init(&vs->tight->gradient, "vnc-tight-gradient/%p", sioc); 3256 #ifdef CONFIG_VNC_JPEG 3257 buffer_init(&vs->tight->jpeg, "vnc-tight-jpeg/%p", sioc); 3258 #endif 3259 #ifdef CONFIG_PNG 3260 buffer_init(&vs->tight->png, "vnc-tight-png/%p", sioc); 3261 #endif 3262 buffer_init(&vs->zlib.zlib, "vnc-zlib/%p", sioc); 3263 buffer_init(&vs->zrle->zrle, "vnc-zrle/%p", sioc); 3264 buffer_init(&vs->zrle->fb, "vnc-zrle-fb/%p", sioc); 3265 buffer_init(&vs->zrle->zlib, "vnc-zrle-zlib/%p", sioc); 3266 3267 if (skipauth) { 3268 vs->auth = VNC_AUTH_NONE; 3269 vs->subauth = VNC_AUTH_INVALID; 3270 } else { 3271 if (websocket) { 3272 vs->auth = vd->ws_auth; 3273 vs->subauth = VNC_AUTH_INVALID; 3274 } else { 3275 vs->auth = vd->auth; 3276 vs->subauth = vd->subauth; 3277 } 3278 } 3279 VNC_DEBUG("Client sioc=%p ws=%d auth=%d subauth=%d\n", 3280 sioc, websocket, vs->auth, vs->subauth); 3281 3282 vs->lossy_rect = g_malloc0(VNC_STAT_ROWS * sizeof (*vs->lossy_rect)); 3283 for (i = 0; i < VNC_STAT_ROWS; ++i) { 3284 vs->lossy_rect[i] = g_new0(uint8_t, VNC_STAT_COLS); 3285 } 3286 3287 VNC_DEBUG("New client on socket %p\n", vs->sioc); 3288 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); 3289 qio_channel_set_blocking(vs->ioc, false, NULL); 3290 if (vs->ioc_tag) { 3291 g_source_remove(vs->ioc_tag); 3292 } 3293 if (websocket) { 3294 vs->websocket = 1; 3295 if (vd->tlscreds) { 3296 vs->ioc_tag = qio_channel_add_watch( 3297 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 3298 vncws_tls_handshake_io, vs, NULL); 3299 } else { 3300 vs->ioc_tag = qio_channel_add_watch( 3301 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 3302 vncws_handshake_io, vs, NULL); 3303 } 3304 } else { 3305 vs->ioc_tag = qio_channel_add_watch( 3306 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 3307 vnc_client_io, vs, NULL); 3308 } 3309 3310 vnc_client_cache_addr(vs); 3311 vnc_qmp_event(vs, QAPI_EVENT_VNC_CONNECTED); 3312 vnc_set_share_mode(vs, VNC_SHARE_MODE_CONNECTING); 3313 3314 vs->last_x = -1; 3315 vs->last_y = -1; 3316 3317 vs->as.freq = 44100; 3318 vs->as.nchannels = 2; 3319 vs->as.fmt = AUDIO_FORMAT_S16; 3320 vs->as.endianness = 0; 3321 3322 qemu_mutex_init(&vs->output_mutex); 3323 vs->bh = qemu_bh_new(vnc_jobs_bh, vs); 3324 3325 QTAILQ_INSERT_TAIL(&vd->clients, vs, next); 3326 if (first_client) { 3327 vnc_update_server_surface(vd); 3328 } 3329 3330 graphic_hw_update(vd->dcl.con); 3331 3332 if (!vs->websocket) { 3333 vnc_start_protocol(vs); 3334 } 3335 3336 if (vd->num_connecting > vd->connections_limit) { 3337 QTAILQ_FOREACH(vs, &vd->clients, next) { 3338 if (vs->share_mode == VNC_SHARE_MODE_CONNECTING) { 3339 vnc_disconnect_start(vs); 3340 return; 3341 } 3342 } 3343 } 3344 } 3345 3346 void vnc_start_protocol(VncState *vs) 3347 { 3348 vnc_write(vs, "RFB 003.008\n", 12); 3349 vnc_flush(vs); 3350 vnc_read_when(vs, protocol_version, 12); 3351 3352 vs->mouse_mode_notifier.notify = check_pointer_type_change; 3353 qemu_add_mouse_mode_change_notifier(&vs->mouse_mode_notifier); 3354 } 3355 3356 static void vnc_listen_io(QIONetListener *listener, 3357 QIOChannelSocket *cioc, 3358 void *opaque) 3359 { 3360 VncDisplay *vd = opaque; 3361 bool isWebsock = listener == vd->wslistener; 3362 3363 qio_channel_set_name(QIO_CHANNEL(cioc), 3364 isWebsock ? "vnc-ws-server" : "vnc-server"); 3365 qio_channel_set_delay(QIO_CHANNEL(cioc), false); 3366 vnc_connect(vd, cioc, false, isWebsock); 3367 } 3368 3369 static const DisplayChangeListenerOps dcl_ops = { 3370 .dpy_name = "vnc", 3371 .dpy_refresh = vnc_refresh, 3372 .dpy_gfx_update = vnc_dpy_update, 3373 .dpy_gfx_switch = vnc_dpy_switch, 3374 .dpy_gfx_check_format = qemu_pixman_check_format, 3375 .dpy_mouse_set = vnc_mouse_set, 3376 .dpy_cursor_define = vnc_dpy_cursor_define, 3377 }; 3378 3379 void vnc_display_init(const char *id, Error **errp) 3380 { 3381 VncDisplay *vd; 3382 3383 if (vnc_display_find(id) != NULL) { 3384 return; 3385 } 3386 vd = g_malloc0(sizeof(*vd)); 3387 3388 vd->id = strdup(id); 3389 QTAILQ_INSERT_TAIL(&vnc_displays, vd, next); 3390 3391 QTAILQ_INIT(&vd->clients); 3392 vd->expires = TIME_MAX; 3393 3394 if (keyboard_layout) { 3395 trace_vnc_key_map_init(keyboard_layout); 3396 vd->kbd_layout = init_keyboard_layout(name2keysym, 3397 keyboard_layout, errp); 3398 } else { 3399 vd->kbd_layout = init_keyboard_layout(name2keysym, "en-us", errp); 3400 } 3401 3402 if (!vd->kbd_layout) { 3403 return; 3404 } 3405 3406 vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; 3407 vd->connections_limit = 32; 3408 3409 qemu_mutex_init(&vd->mutex); 3410 vnc_start_worker_thread(); 3411 3412 vd->dcl.ops = &dcl_ops; 3413 register_displaychangelistener(&vd->dcl); 3414 vd->kbd = qkbd_state_init(vd->dcl.con); 3415 } 3416 3417 3418 static void vnc_display_close(VncDisplay *vd) 3419 { 3420 if (!vd) { 3421 return; 3422 } 3423 vd->is_unix = false; 3424 3425 if (vd->listener) { 3426 qio_net_listener_disconnect(vd->listener); 3427 object_unref(OBJECT(vd->listener)); 3428 } 3429 vd->listener = NULL; 3430 3431 if (vd->wslistener) { 3432 qio_net_listener_disconnect(vd->wslistener); 3433 object_unref(OBJECT(vd->wslistener)); 3434 } 3435 vd->wslistener = NULL; 3436 3437 vd->auth = VNC_AUTH_INVALID; 3438 vd->subauth = VNC_AUTH_INVALID; 3439 if (vd->tlscreds) { 3440 object_unref(OBJECT(vd->tlscreds)); 3441 vd->tlscreds = NULL; 3442 } 3443 if (vd->tlsauthz) { 3444 object_unparent(OBJECT(vd->tlsauthz)); 3445 vd->tlsauthz = NULL; 3446 } 3447 g_free(vd->tlsauthzid); 3448 vd->tlsauthzid = NULL; 3449 if (vd->lock_key_sync) { 3450 qemu_remove_led_event_handler(vd->led); 3451 vd->led = NULL; 3452 } 3453 #ifdef CONFIG_VNC_SASL 3454 if (vd->sasl.authz) { 3455 object_unparent(OBJECT(vd->sasl.authz)); 3456 vd->sasl.authz = NULL; 3457 } 3458 g_free(vd->sasl.authzid); 3459 vd->sasl.authzid = NULL; 3460 #endif 3461 } 3462 3463 int vnc_display_password(const char *id, const char *password) 3464 { 3465 VncDisplay *vd = vnc_display_find(id); 3466 3467 if (!vd) { 3468 return -EINVAL; 3469 } 3470 if (vd->auth == VNC_AUTH_NONE) { 3471 error_printf_unless_qmp("If you want use passwords please enable " 3472 "password auth using '-vnc ${dpy},password'.\n"); 3473 return -EINVAL; 3474 } 3475 3476 g_free(vd->password); 3477 vd->password = g_strdup(password); 3478 3479 return 0; 3480 } 3481 3482 int vnc_display_pw_expire(const char *id, time_t expires) 3483 { 3484 VncDisplay *vd = vnc_display_find(id); 3485 3486 if (!vd) { 3487 return -EINVAL; 3488 } 3489 3490 vd->expires = expires; 3491 return 0; 3492 } 3493 3494 static void vnc_display_print_local_addr(VncDisplay *vd) 3495 { 3496 SocketAddress *addr; 3497 3498 if (!vd->listener || !vd->listener->nsioc) { 3499 return; 3500 } 3501 3502 addr = qio_channel_socket_get_local_address(vd->listener->sioc[0], NULL); 3503 if (!addr) { 3504 return; 3505 } 3506 3507 if (addr->type != SOCKET_ADDRESS_TYPE_INET) { 3508 qapi_free_SocketAddress(addr); 3509 return; 3510 } 3511 error_printf_unless_qmp("VNC server running on %s:%s\n", 3512 addr->u.inet.host, 3513 addr->u.inet.port); 3514 qapi_free_SocketAddress(addr); 3515 } 3516 3517 static QemuOptsList qemu_vnc_opts = { 3518 .name = "vnc", 3519 .head = QTAILQ_HEAD_INITIALIZER(qemu_vnc_opts.head), 3520 .implied_opt_name = "vnc", 3521 .desc = { 3522 { 3523 .name = "vnc", 3524 .type = QEMU_OPT_STRING, 3525 },{ 3526 .name = "websocket", 3527 .type = QEMU_OPT_STRING, 3528 },{ 3529 .name = "tls-creds", 3530 .type = QEMU_OPT_STRING, 3531 },{ 3532 .name = "share", 3533 .type = QEMU_OPT_STRING, 3534 },{ 3535 .name = "display", 3536 .type = QEMU_OPT_STRING, 3537 },{ 3538 .name = "head", 3539 .type = QEMU_OPT_NUMBER, 3540 },{ 3541 .name = "connections", 3542 .type = QEMU_OPT_NUMBER, 3543 },{ 3544 .name = "to", 3545 .type = QEMU_OPT_NUMBER, 3546 },{ 3547 .name = "ipv4", 3548 .type = QEMU_OPT_BOOL, 3549 },{ 3550 .name = "ipv6", 3551 .type = QEMU_OPT_BOOL, 3552 },{ 3553 .name = "password", 3554 .type = QEMU_OPT_BOOL, 3555 },{ 3556 .name = "password-secret", 3557 .type = QEMU_OPT_STRING, 3558 },{ 3559 .name = "reverse", 3560 .type = QEMU_OPT_BOOL, 3561 },{ 3562 .name = "lock-key-sync", 3563 .type = QEMU_OPT_BOOL, 3564 },{ 3565 .name = "key-delay-ms", 3566 .type = QEMU_OPT_NUMBER, 3567 },{ 3568 .name = "sasl", 3569 .type = QEMU_OPT_BOOL, 3570 },{ 3571 .name = "tls-authz", 3572 .type = QEMU_OPT_STRING, 3573 },{ 3574 .name = "sasl-authz", 3575 .type = QEMU_OPT_STRING, 3576 },{ 3577 .name = "lossy", 3578 .type = QEMU_OPT_BOOL, 3579 },{ 3580 .name = "non-adaptive", 3581 .type = QEMU_OPT_BOOL, 3582 },{ 3583 .name = "audiodev", 3584 .type = QEMU_OPT_STRING, 3585 },{ 3586 .name = "power-control", 3587 .type = QEMU_OPT_BOOL, 3588 }, 3589 { /* end of list */ } 3590 }, 3591 }; 3592 3593 3594 static int 3595 vnc_display_setup_auth(int *auth, 3596 int *subauth, 3597 QCryptoTLSCreds *tlscreds, 3598 bool password, 3599 bool sasl, 3600 bool websocket, 3601 Error **errp) 3602 { 3603 /* 3604 * We have a choice of 3 authentication options 3605 * 3606 * 1. none 3607 * 2. vnc 3608 * 3. sasl 3609 * 3610 * The channel can be run in 2 modes 3611 * 3612 * 1. clear 3613 * 2. tls 3614 * 3615 * And TLS can use 2 types of credentials 3616 * 3617 * 1. anon 3618 * 2. x509 3619 * 3620 * We thus have 9 possible logical combinations 3621 * 3622 * 1. clear + none 3623 * 2. clear + vnc 3624 * 3. clear + sasl 3625 * 4. tls + anon + none 3626 * 5. tls + anon + vnc 3627 * 6. tls + anon + sasl 3628 * 7. tls + x509 + none 3629 * 8. tls + x509 + vnc 3630 * 9. tls + x509 + sasl 3631 * 3632 * These need to be mapped into the VNC auth schemes 3633 * in an appropriate manner. In regular VNC, all the 3634 * TLS options get mapped into VNC_AUTH_VENCRYPT 3635 * sub-auth types. 3636 * 3637 * In websockets, the https:// protocol already provides 3638 * TLS support, so there is no need to make use of the 3639 * VeNCrypt extension. Furthermore, websockets browser 3640 * clients could not use VeNCrypt even if they wanted to, 3641 * as they cannot control when the TLS handshake takes 3642 * place. Thus there is no option but to rely on https://, 3643 * meaning combinations 4->6 and 7->9 will be mapped to 3644 * VNC auth schemes in the same way as combos 1->3. 3645 * 3646 * Regardless of fact that we have a different mapping to 3647 * VNC auth mechs for plain VNC vs websockets VNC, the end 3648 * result has the same security characteristics. 3649 */ 3650 if (websocket || !tlscreds) { 3651 if (password) { 3652 VNC_DEBUG("Initializing VNC server with password auth\n"); 3653 *auth = VNC_AUTH_VNC; 3654 } else if (sasl) { 3655 VNC_DEBUG("Initializing VNC server with SASL auth\n"); 3656 *auth = VNC_AUTH_SASL; 3657 } else { 3658 VNC_DEBUG("Initializing VNC server with no auth\n"); 3659 *auth = VNC_AUTH_NONE; 3660 } 3661 *subauth = VNC_AUTH_INVALID; 3662 } else { 3663 bool is_x509 = object_dynamic_cast(OBJECT(tlscreds), 3664 TYPE_QCRYPTO_TLS_CREDS_X509) != NULL; 3665 bool is_anon = object_dynamic_cast(OBJECT(tlscreds), 3666 TYPE_QCRYPTO_TLS_CREDS_ANON) != NULL; 3667 3668 if (!is_x509 && !is_anon) { 3669 error_setg(errp, 3670 "Unsupported TLS cred type %s", 3671 object_get_typename(OBJECT(tlscreds))); 3672 return -1; 3673 } 3674 *auth = VNC_AUTH_VENCRYPT; 3675 if (password) { 3676 if (is_x509) { 3677 VNC_DEBUG("Initializing VNC server with x509 password auth\n"); 3678 *subauth = VNC_AUTH_VENCRYPT_X509VNC; 3679 } else { 3680 VNC_DEBUG("Initializing VNC server with TLS password auth\n"); 3681 *subauth = VNC_AUTH_VENCRYPT_TLSVNC; 3682 } 3683 3684 } else if (sasl) { 3685 if (is_x509) { 3686 VNC_DEBUG("Initializing VNC server with x509 SASL auth\n"); 3687 *subauth = VNC_AUTH_VENCRYPT_X509SASL; 3688 } else { 3689 VNC_DEBUG("Initializing VNC server with TLS SASL auth\n"); 3690 *subauth = VNC_AUTH_VENCRYPT_TLSSASL; 3691 } 3692 } else { 3693 if (is_x509) { 3694 VNC_DEBUG("Initializing VNC server with x509 no auth\n"); 3695 *subauth = VNC_AUTH_VENCRYPT_X509NONE; 3696 } else { 3697 VNC_DEBUG("Initializing VNC server with TLS no auth\n"); 3698 *subauth = VNC_AUTH_VENCRYPT_TLSNONE; 3699 } 3700 } 3701 } 3702 return 0; 3703 } 3704 3705 3706 static int vnc_display_get_address(const char *addrstr, 3707 bool websocket, 3708 bool reverse, 3709 int displaynum, 3710 int to, 3711 bool has_ipv4, 3712 bool has_ipv6, 3713 bool ipv4, 3714 bool ipv6, 3715 SocketAddress **retaddr, 3716 Error **errp) 3717 { 3718 int ret = -1; 3719 SocketAddress *addr = NULL; 3720 3721 addr = g_new0(SocketAddress, 1); 3722 3723 if (strncmp(addrstr, "unix:", 5) == 0) { 3724 addr->type = SOCKET_ADDRESS_TYPE_UNIX; 3725 addr->u.q_unix.path = g_strdup(addrstr + 5); 3726 3727 if (websocket) { 3728 error_setg(errp, "UNIX sockets not supported with websock"); 3729 goto cleanup; 3730 } 3731 3732 if (to) { 3733 error_setg(errp, "Port range not support with UNIX socket"); 3734 goto cleanup; 3735 } 3736 ret = 0; 3737 } else { 3738 const char *port; 3739 size_t hostlen; 3740 unsigned long long baseport = 0; 3741 InetSocketAddress *inet; 3742 3743 port = strrchr(addrstr, ':'); 3744 if (!port) { 3745 if (websocket) { 3746 hostlen = 0; 3747 port = addrstr; 3748 } else { 3749 error_setg(errp, "no vnc port specified"); 3750 goto cleanup; 3751 } 3752 } else { 3753 hostlen = port - addrstr; 3754 port++; 3755 if (*port == '\0') { 3756 error_setg(errp, "vnc port cannot be empty"); 3757 goto cleanup; 3758 } 3759 } 3760 3761 addr->type = SOCKET_ADDRESS_TYPE_INET; 3762 inet = &addr->u.inet; 3763 if (addrstr[0] == '[' && addrstr[hostlen - 1] == ']') { 3764 inet->host = g_strndup(addrstr + 1, hostlen - 2); 3765 } else { 3766 inet->host = g_strndup(addrstr, hostlen); 3767 } 3768 /* plain VNC port is just an offset, for websocket 3769 * port is absolute */ 3770 if (websocket) { 3771 if (g_str_equal(addrstr, "") || 3772 g_str_equal(addrstr, "on")) { 3773 if (displaynum == -1) { 3774 error_setg(errp, "explicit websocket port is required"); 3775 goto cleanup; 3776 } 3777 inet->port = g_strdup_printf( 3778 "%d", displaynum + 5700); 3779 if (to) { 3780 inet->has_to = true; 3781 inet->to = to + 5700; 3782 } 3783 } else { 3784 inet->port = g_strdup(port); 3785 } 3786 } else { 3787 int offset = reverse ? 0 : 5900; 3788 if (parse_uint_full(port, &baseport, 10) < 0) { 3789 error_setg(errp, "can't convert to a number: %s", port); 3790 goto cleanup; 3791 } 3792 if (baseport > 65535 || 3793 baseport + offset > 65535) { 3794 error_setg(errp, "port %s out of range", port); 3795 goto cleanup; 3796 } 3797 inet->port = g_strdup_printf( 3798 "%d", (int)baseport + offset); 3799 3800 if (to) { 3801 inet->has_to = true; 3802 inet->to = to + offset; 3803 } 3804 } 3805 3806 inet->ipv4 = ipv4; 3807 inet->has_ipv4 = has_ipv4; 3808 inet->ipv6 = ipv6; 3809 inet->has_ipv6 = has_ipv6; 3810 3811 ret = baseport; 3812 } 3813 3814 *retaddr = addr; 3815 3816 cleanup: 3817 if (ret < 0) { 3818 qapi_free_SocketAddress(addr); 3819 } 3820 return ret; 3821 } 3822 3823 static int vnc_display_get_addresses(QemuOpts *opts, 3824 bool reverse, 3825 SocketAddressList **saddr_list_ret, 3826 SocketAddressList **wsaddr_list_ret, 3827 Error **errp) 3828 { 3829 SocketAddress *saddr = NULL; 3830 SocketAddress *wsaddr = NULL; 3831 g_autoptr(SocketAddressList) saddr_list = NULL; 3832 SocketAddressList **saddr_tail = &saddr_list; 3833 SocketAddress *single_saddr = NULL; 3834 g_autoptr(SocketAddressList) wsaddr_list = NULL; 3835 SocketAddressList **wsaddr_tail = &wsaddr_list; 3836 QemuOptsIter addriter; 3837 const char *addr; 3838 int to = qemu_opt_get_number(opts, "to", 0); 3839 bool has_ipv4 = qemu_opt_get(opts, "ipv4"); 3840 bool has_ipv6 = qemu_opt_get(opts, "ipv6"); 3841 bool ipv4 = qemu_opt_get_bool(opts, "ipv4", false); 3842 bool ipv6 = qemu_opt_get_bool(opts, "ipv6", false); 3843 int displaynum = -1; 3844 3845 addr = qemu_opt_get(opts, "vnc"); 3846 if (addr == NULL || g_str_equal(addr, "none")) { 3847 return 0; 3848 } 3849 if (qemu_opt_get(opts, "websocket") && 3850 !qcrypto_hash_supports(QCRYPTO_HASH_ALG_SHA1)) { 3851 error_setg(errp, 3852 "SHA1 hash support is required for websockets"); 3853 return -1; 3854 } 3855 3856 qemu_opt_iter_init(&addriter, opts, "vnc"); 3857 while ((addr = qemu_opt_iter_next(&addriter)) != NULL) { 3858 int rv; 3859 rv = vnc_display_get_address(addr, false, reverse, 0, to, 3860 has_ipv4, has_ipv6, 3861 ipv4, ipv6, 3862 &saddr, errp); 3863 if (rv < 0) { 3864 return -1; 3865 } 3866 /* Historical compat - first listen address can be used 3867 * to set the default websocket port 3868 */ 3869 if (displaynum == -1) { 3870 displaynum = rv; 3871 } 3872 QAPI_LIST_APPEND(saddr_tail, saddr); 3873 } 3874 3875 if (saddr_list && !saddr_list->next) { 3876 single_saddr = saddr_list->value; 3877 } else { 3878 /* 3879 * If we had multiple primary displays, we don't do defaults 3880 * for websocket, and require explicit config instead. 3881 */ 3882 displaynum = -1; 3883 } 3884 3885 qemu_opt_iter_init(&addriter, opts, "websocket"); 3886 while ((addr = qemu_opt_iter_next(&addriter)) != NULL) { 3887 if (vnc_display_get_address(addr, true, reverse, displaynum, to, 3888 has_ipv4, has_ipv6, 3889 ipv4, ipv6, 3890 &wsaddr, errp) < 0) { 3891 return -1; 3892 } 3893 3894 /* Historical compat - if only a single listen address was 3895 * provided, then this is used to set the default listen 3896 * address for websocket too 3897 */ 3898 if (single_saddr && 3899 single_saddr->type == SOCKET_ADDRESS_TYPE_INET && 3900 wsaddr->type == SOCKET_ADDRESS_TYPE_INET && 3901 g_str_equal(wsaddr->u.inet.host, "") && 3902 !g_str_equal(single_saddr->u.inet.host, "")) { 3903 g_free(wsaddr->u.inet.host); 3904 wsaddr->u.inet.host = g_strdup(single_saddr->u.inet.host); 3905 } 3906 3907 QAPI_LIST_APPEND(wsaddr_tail, wsaddr); 3908 } 3909 3910 *saddr_list_ret = g_steal_pointer(&saddr_list); 3911 *wsaddr_list_ret = g_steal_pointer(&wsaddr_list); 3912 return 0; 3913 } 3914 3915 static int vnc_display_connect(VncDisplay *vd, 3916 SocketAddressList *saddr_list, 3917 SocketAddressList *wsaddr_list, 3918 Error **errp) 3919 { 3920 /* connect to viewer */ 3921 QIOChannelSocket *sioc = NULL; 3922 if (wsaddr_list) { 3923 error_setg(errp, "Cannot use websockets in reverse mode"); 3924 return -1; 3925 } 3926 if (!saddr_list || saddr_list->next) { 3927 error_setg(errp, "Expected a single address in reverse mode"); 3928 return -1; 3929 } 3930 /* TODO SOCKET_ADDRESS_TYPE_FD when fd has AF_UNIX */ 3931 vd->is_unix = saddr_list->value->type == SOCKET_ADDRESS_TYPE_UNIX; 3932 sioc = qio_channel_socket_new(); 3933 qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-reverse"); 3934 if (qio_channel_socket_connect_sync(sioc, saddr_list->value, errp) < 0) { 3935 object_unref(OBJECT(sioc)); 3936 return -1; 3937 } 3938 vnc_connect(vd, sioc, false, false); 3939 object_unref(OBJECT(sioc)); 3940 return 0; 3941 } 3942 3943 3944 static int vnc_display_listen(VncDisplay *vd, 3945 SocketAddressList *saddr_list, 3946 SocketAddressList *wsaddr_list, 3947 Error **errp) 3948 { 3949 SocketAddressList *el; 3950 3951 if (saddr_list) { 3952 vd->listener = qio_net_listener_new(); 3953 qio_net_listener_set_name(vd->listener, "vnc-listen"); 3954 for (el = saddr_list; el; el = el->next) { 3955 if (qio_net_listener_open_sync(vd->listener, 3956 el->value, 1, 3957 errp) < 0) { 3958 return -1; 3959 } 3960 } 3961 3962 qio_net_listener_set_client_func(vd->listener, 3963 vnc_listen_io, vd, NULL); 3964 } 3965 3966 if (wsaddr_list) { 3967 vd->wslistener = qio_net_listener_new(); 3968 qio_net_listener_set_name(vd->wslistener, "vnc-ws-listen"); 3969 for (el = wsaddr_list; el; el = el->next) { 3970 if (qio_net_listener_open_sync(vd->wslistener, 3971 el->value, 1, 3972 errp) < 0) { 3973 return -1; 3974 } 3975 } 3976 3977 qio_net_listener_set_client_func(vd->wslistener, 3978 vnc_listen_io, vd, NULL); 3979 } 3980 3981 return 0; 3982 } 3983 3984 bool vnc_display_update(DisplayUpdateOptionsVNC *arg, Error **errp) 3985 { 3986 VncDisplay *vd = vnc_display_find(NULL); 3987 3988 if (!vd) { 3989 error_setg(errp, "Can not find vnc display"); 3990 return false; 3991 } 3992 3993 if (arg->has_addresses) { 3994 if (vd->listener) { 3995 qio_net_listener_disconnect(vd->listener); 3996 object_unref(OBJECT(vd->listener)); 3997 vd->listener = NULL; 3998 } 3999 4000 if (vnc_display_listen(vd, arg->addresses, NULL, errp) < 0) { 4001 return false; 4002 } 4003 } 4004 4005 return true; 4006 } 4007 4008 void vnc_display_open(const char *id, Error **errp) 4009 { 4010 VncDisplay *vd = vnc_display_find(id); 4011 QemuOpts *opts = qemu_opts_find(&qemu_vnc_opts, id); 4012 g_autoptr(SocketAddressList) saddr_list = NULL; 4013 g_autoptr(SocketAddressList) wsaddr_list = NULL; 4014 const char *share, *device_id; 4015 QemuConsole *con; 4016 bool password = false; 4017 bool reverse = false; 4018 const char *credid; 4019 bool sasl = false; 4020 const char *tlsauthz; 4021 const char *saslauthz; 4022 int lock_key_sync = 1; 4023 int key_delay_ms; 4024 const char *audiodev; 4025 const char *passwordSecret; 4026 4027 if (!vd) { 4028 error_setg(errp, "VNC display not active"); 4029 return; 4030 } 4031 vnc_display_close(vd); 4032 4033 if (!opts) { 4034 return; 4035 } 4036 4037 reverse = qemu_opt_get_bool(opts, "reverse", false); 4038 if (vnc_display_get_addresses(opts, reverse, &saddr_list, &wsaddr_list, 4039 errp) < 0) { 4040 goto fail; 4041 } 4042 4043 4044 passwordSecret = qemu_opt_get(opts, "password-secret"); 4045 if (passwordSecret) { 4046 if (qemu_opt_get(opts, "password")) { 4047 error_setg(errp, 4048 "'password' flag is redundant with 'password-secret'"); 4049 goto fail; 4050 } 4051 vd->password = qcrypto_secret_lookup_as_utf8(passwordSecret, 4052 errp); 4053 if (!vd->password) { 4054 goto fail; 4055 } 4056 password = true; 4057 } else { 4058 password = qemu_opt_get_bool(opts, "password", false); 4059 } 4060 if (password) { 4061 if (!qcrypto_cipher_supports( 4062 QCRYPTO_CIPHER_ALG_DES, QCRYPTO_CIPHER_MODE_ECB)) { 4063 error_setg(errp, 4064 "Cipher backend does not support DES algorithm"); 4065 goto fail; 4066 } 4067 } 4068 4069 lock_key_sync = qemu_opt_get_bool(opts, "lock-key-sync", true); 4070 key_delay_ms = qemu_opt_get_number(opts, "key-delay-ms", 10); 4071 sasl = qemu_opt_get_bool(opts, "sasl", false); 4072 #ifndef CONFIG_VNC_SASL 4073 if (sasl) { 4074 error_setg(errp, "VNC SASL auth requires cyrus-sasl support"); 4075 goto fail; 4076 } 4077 #endif /* CONFIG_VNC_SASL */ 4078 credid = qemu_opt_get(opts, "tls-creds"); 4079 if (credid) { 4080 Object *creds; 4081 creds = object_resolve_path_component( 4082 object_get_objects_root(), credid); 4083 if (!creds) { 4084 error_setg(errp, "No TLS credentials with id '%s'", 4085 credid); 4086 goto fail; 4087 } 4088 vd->tlscreds = (QCryptoTLSCreds *) 4089 object_dynamic_cast(creds, 4090 TYPE_QCRYPTO_TLS_CREDS); 4091 if (!vd->tlscreds) { 4092 error_setg(errp, "Object with id '%s' is not TLS credentials", 4093 credid); 4094 goto fail; 4095 } 4096 object_ref(OBJECT(vd->tlscreds)); 4097 4098 if (!qcrypto_tls_creds_check_endpoint(vd->tlscreds, 4099 QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, 4100 errp)) { 4101 goto fail; 4102 } 4103 } 4104 tlsauthz = qemu_opt_get(opts, "tls-authz"); 4105 if (tlsauthz && !vd->tlscreds) { 4106 error_setg(errp, "'tls-authz' provided but TLS is not enabled"); 4107 goto fail; 4108 } 4109 4110 saslauthz = qemu_opt_get(opts, "sasl-authz"); 4111 if (saslauthz && !sasl) { 4112 error_setg(errp, "'sasl-authz' provided but SASL auth is not enabled"); 4113 goto fail; 4114 } 4115 4116 share = qemu_opt_get(opts, "share"); 4117 if (share) { 4118 if (strcmp(share, "ignore") == 0) { 4119 vd->share_policy = VNC_SHARE_POLICY_IGNORE; 4120 } else if (strcmp(share, "allow-exclusive") == 0) { 4121 vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; 4122 } else if (strcmp(share, "force-shared") == 0) { 4123 vd->share_policy = VNC_SHARE_POLICY_FORCE_SHARED; 4124 } else { 4125 error_setg(errp, "unknown vnc share= option"); 4126 goto fail; 4127 } 4128 } else { 4129 vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; 4130 } 4131 vd->connections_limit = qemu_opt_get_number(opts, "connections", 32); 4132 4133 #ifdef CONFIG_VNC_JPEG 4134 vd->lossy = qemu_opt_get_bool(opts, "lossy", false); 4135 #endif 4136 vd->non_adaptive = qemu_opt_get_bool(opts, "non-adaptive", false); 4137 /* adaptive updates are only used with tight encoding and 4138 * if lossy updates are enabled so we can disable all the 4139 * calculations otherwise */ 4140 if (!vd->lossy) { 4141 vd->non_adaptive = true; 4142 } 4143 4144 vd->power_control = qemu_opt_get_bool(opts, "power-control", false); 4145 4146 if (tlsauthz) { 4147 vd->tlsauthzid = g_strdup(tlsauthz); 4148 } 4149 #ifdef CONFIG_VNC_SASL 4150 if (sasl) { 4151 if (saslauthz) { 4152 vd->sasl.authzid = g_strdup(saslauthz); 4153 } 4154 } 4155 #endif 4156 4157 if (vnc_display_setup_auth(&vd->auth, &vd->subauth, 4158 vd->tlscreds, password, 4159 sasl, false, errp) < 0) { 4160 goto fail; 4161 } 4162 trace_vnc_auth_init(vd, 0, vd->auth, vd->subauth); 4163 4164 if (vnc_display_setup_auth(&vd->ws_auth, &vd->ws_subauth, 4165 vd->tlscreds, password, 4166 sasl, true, errp) < 0) { 4167 goto fail; 4168 } 4169 trace_vnc_auth_init(vd, 1, vd->ws_auth, vd->ws_subauth); 4170 4171 #ifdef CONFIG_VNC_SASL 4172 if (sasl && !vnc_sasl_server_init(errp)) { 4173 goto fail; 4174 } 4175 #endif 4176 vd->lock_key_sync = lock_key_sync; 4177 if (lock_key_sync) { 4178 vd->led = qemu_add_led_event_handler(kbd_leds, vd); 4179 } 4180 vd->ledstate = 0; 4181 4182 audiodev = qemu_opt_get(opts, "audiodev"); 4183 if (audiodev) { 4184 vd->audio_state = audio_state_by_name(audiodev); 4185 if (!vd->audio_state) { 4186 error_setg(errp, "Audiodev '%s' not found", audiodev); 4187 goto fail; 4188 } 4189 } 4190 4191 device_id = qemu_opt_get(opts, "display"); 4192 if (device_id) { 4193 int head = qemu_opt_get_number(opts, "head", 0); 4194 Error *err = NULL; 4195 4196 con = qemu_console_lookup_by_device_name(device_id, head, &err); 4197 if (err) { 4198 error_propagate(errp, err); 4199 goto fail; 4200 } 4201 } else { 4202 con = NULL; 4203 } 4204 4205 if (con != vd->dcl.con) { 4206 qkbd_state_free(vd->kbd); 4207 unregister_displaychangelistener(&vd->dcl); 4208 vd->dcl.con = con; 4209 register_displaychangelistener(&vd->dcl); 4210 vd->kbd = qkbd_state_init(vd->dcl.con); 4211 } 4212 qkbd_state_set_delay(vd->kbd, key_delay_ms); 4213 4214 if (saddr_list == NULL) { 4215 return; 4216 } 4217 4218 if (reverse) { 4219 if (vnc_display_connect(vd, saddr_list, wsaddr_list, errp) < 0) { 4220 goto fail; 4221 } 4222 } else { 4223 if (vnc_display_listen(vd, saddr_list, wsaddr_list, errp) < 0) { 4224 goto fail; 4225 } 4226 } 4227 4228 if (qemu_opt_get(opts, "to")) { 4229 vnc_display_print_local_addr(vd); 4230 } 4231 4232 /* Success */ 4233 return; 4234 4235 fail: 4236 vnc_display_close(vd); 4237 } 4238 4239 void vnc_display_add_client(const char *id, int csock, bool skipauth) 4240 { 4241 VncDisplay *vd = vnc_display_find(id); 4242 QIOChannelSocket *sioc; 4243 4244 if (!vd) { 4245 return; 4246 } 4247 4248 sioc = qio_channel_socket_new_fd(csock, NULL); 4249 if (sioc) { 4250 qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-server"); 4251 vnc_connect(vd, sioc, skipauth, false); 4252 object_unref(OBJECT(sioc)); 4253 } 4254 } 4255 4256 static void vnc_auto_assign_id(QemuOptsList *olist, QemuOpts *opts) 4257 { 4258 int i = 2; 4259 char *id; 4260 4261 id = g_strdup("default"); 4262 while (qemu_opts_find(olist, id)) { 4263 g_free(id); 4264 id = g_strdup_printf("vnc%d", i++); 4265 } 4266 qemu_opts_set_id(opts, id); 4267 } 4268 4269 void vnc_parse(const char *str) 4270 { 4271 QemuOptsList *olist = qemu_find_opts("vnc"); 4272 QemuOpts *opts = qemu_opts_parse_noisily(olist, str, !is_help_option(str)); 4273 const char *id; 4274 4275 if (!opts) { 4276 exit(1); 4277 } 4278 4279 id = qemu_opts_id(opts); 4280 if (!id) { 4281 /* auto-assign id if not present */ 4282 vnc_auto_assign_id(olist, opts); 4283 } 4284 } 4285 4286 int vnc_init_func(void *opaque, QemuOpts *opts, Error **errp) 4287 { 4288 Error *local_err = NULL; 4289 char *id = (char *)qemu_opts_id(opts); 4290 4291 assert(id); 4292 vnc_display_init(id, &local_err); 4293 if (local_err) { 4294 error_propagate(errp, local_err); 4295 return -1; 4296 } 4297 vnc_display_open(id, &local_err); 4298 if (local_err != NULL) { 4299 error_propagate(errp, local_err); 4300 return -1; 4301 } 4302 return 0; 4303 } 4304 4305 static void vnc_register_config(void) 4306 { 4307 qemu_add_opts(&qemu_vnc_opts); 4308 } 4309 opts_init(vnc_register_config); 4310