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 uint32_t dlen = abs(read_s32(data, 4)); 2446 if (len == 8) { 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 if (dlen < 4) { 2460 error_report("vnc: malformed payload (header less than 4 bytes)" 2461 " in extended clipboard pseudo-encoding."); 2462 vnc_client_error(vs); 2463 break; 2464 } 2465 vnc_client_cut_text_ext(vs, dlen, read_u32(data, 8), data + 12); 2466 break; 2467 } 2468 vnc_client_cut_text(vs, read_u32(data, 4), data + 8); 2469 break; 2470 case VNC_MSG_CLIENT_XVP: 2471 if (!(vs->features & VNC_FEATURE_XVP)) { 2472 error_report("vnc: xvp client message while disabled"); 2473 vnc_client_error(vs); 2474 break; 2475 } 2476 if (len == 1) { 2477 return 4; 2478 } 2479 if (len == 4) { 2480 uint8_t version = read_u8(data, 2); 2481 uint8_t action = read_u8(data, 3); 2482 2483 if (version != 1) { 2484 error_report("vnc: xvp client message version %d != 1", 2485 version); 2486 vnc_client_error(vs); 2487 break; 2488 } 2489 2490 switch (action) { 2491 case VNC_XVP_ACTION_SHUTDOWN: 2492 qemu_system_powerdown_request(); 2493 break; 2494 case VNC_XVP_ACTION_REBOOT: 2495 send_xvp_message(vs, VNC_XVP_CODE_FAIL); 2496 break; 2497 case VNC_XVP_ACTION_RESET: 2498 qemu_system_reset_request(SHUTDOWN_CAUSE_HOST_QMP_SYSTEM_RESET); 2499 break; 2500 default: 2501 send_xvp_message(vs, VNC_XVP_CODE_FAIL); 2502 break; 2503 } 2504 } 2505 break; 2506 case VNC_MSG_CLIENT_QEMU: 2507 if (len == 1) 2508 return 2; 2509 2510 switch (read_u8(data, 1)) { 2511 case VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT: 2512 if (len == 2) 2513 return 12; 2514 2515 ext_key_event(vs, read_u16(data, 2), 2516 read_u32(data, 4), read_u32(data, 8)); 2517 break; 2518 case VNC_MSG_CLIENT_QEMU_AUDIO: 2519 if (len == 2) 2520 return 4; 2521 2522 switch (read_u16 (data, 2)) { 2523 case VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE: 2524 trace_vnc_msg_client_audio_enable(vs, vs->ioc); 2525 audio_add(vs); 2526 break; 2527 case VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE: 2528 trace_vnc_msg_client_audio_disable(vs, vs->ioc); 2529 audio_del(vs); 2530 break; 2531 case VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT: 2532 if (len == 4) 2533 return 10; 2534 switch (read_u8(data, 4)) { 2535 case 0: vs->as.fmt = AUDIO_FORMAT_U8; break; 2536 case 1: vs->as.fmt = AUDIO_FORMAT_S8; break; 2537 case 2: vs->as.fmt = AUDIO_FORMAT_U16; break; 2538 case 3: vs->as.fmt = AUDIO_FORMAT_S16; break; 2539 case 4: vs->as.fmt = AUDIO_FORMAT_U32; break; 2540 case 5: vs->as.fmt = AUDIO_FORMAT_S32; break; 2541 default: 2542 VNC_DEBUG("Invalid audio format %d\n", read_u8(data, 4)); 2543 vnc_client_error(vs); 2544 break; 2545 } 2546 vs->as.nchannels = read_u8(data, 5); 2547 if (vs->as.nchannels != 1 && vs->as.nchannels != 2) { 2548 VNC_DEBUG("Invalid audio channel count %d\n", 2549 read_u8(data, 5)); 2550 vnc_client_error(vs); 2551 break; 2552 } 2553 freq = read_u32(data, 6); 2554 /* No official limit for protocol, but 48khz is a sensible 2555 * upper bound for trustworthy clients, and this limit 2556 * protects calculations involving 'vs->as.freq' later. 2557 */ 2558 if (freq > 48000) { 2559 VNC_DEBUG("Invalid audio frequency %u > 48000", freq); 2560 vnc_client_error(vs); 2561 break; 2562 } 2563 vs->as.freq = freq; 2564 trace_vnc_msg_client_audio_format( 2565 vs, vs->ioc, vs->as.fmt, vs->as.nchannels, vs->as.freq); 2566 break; 2567 default: 2568 VNC_DEBUG("Invalid audio message %d\n", read_u8(data, 4)); 2569 vnc_client_error(vs); 2570 break; 2571 } 2572 break; 2573 2574 default: 2575 VNC_DEBUG("Msg: %d\n", read_u16(data, 0)); 2576 vnc_client_error(vs); 2577 break; 2578 } 2579 break; 2580 case VNC_MSG_CLIENT_SET_DESKTOP_SIZE: 2581 { 2582 size_t size; 2583 uint8_t screens; 2584 int w, h; 2585 2586 if (len < 8) { 2587 return 8; 2588 } 2589 2590 screens = read_u8(data, 6); 2591 size = 8 + screens * 16; 2592 if (len < size) { 2593 return size; 2594 } 2595 w = read_u16(data, 2); 2596 h = read_u16(data, 4); 2597 2598 trace_vnc_msg_client_set_desktop_size(vs, vs->ioc, w, h, screens); 2599 if (dpy_ui_info_supported(vs->vd->dcl.con)) { 2600 QemuUIInfo info; 2601 memset(&info, 0, sizeof(info)); 2602 info.width = w; 2603 info.height = h; 2604 dpy_set_ui_info(vs->vd->dcl.con, &info, false); 2605 vnc_desktop_resize_ext(vs, 4 /* Request forwarded */); 2606 } else { 2607 vnc_desktop_resize_ext(vs, 3 /* Invalid screen layout */); 2608 } 2609 2610 break; 2611 } 2612 default: 2613 VNC_DEBUG("Msg: %d\n", data[0]); 2614 vnc_client_error(vs); 2615 break; 2616 } 2617 2618 vnc_update_throttle_offset(vs); 2619 vnc_read_when(vs, protocol_client_msg, 1); 2620 return 0; 2621 } 2622 2623 static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) 2624 { 2625 char buf[1024]; 2626 VncShareMode mode; 2627 int size; 2628 2629 mode = data[0] ? VNC_SHARE_MODE_SHARED : VNC_SHARE_MODE_EXCLUSIVE; 2630 switch (vs->vd->share_policy) { 2631 case VNC_SHARE_POLICY_IGNORE: 2632 /* 2633 * Ignore the shared flag. Nothing to do here. 2634 * 2635 * Doesn't conform to the rfb spec but is traditional qemu 2636 * behavior, thus left here as option for compatibility 2637 * reasons. 2638 */ 2639 break; 2640 case VNC_SHARE_POLICY_ALLOW_EXCLUSIVE: 2641 /* 2642 * Policy: Allow clients ask for exclusive access. 2643 * 2644 * Implementation: When a client asks for exclusive access, 2645 * disconnect all others. Shared connects are allowed as long 2646 * as no exclusive connection exists. 2647 * 2648 * This is how the rfb spec suggests to handle the shared flag. 2649 */ 2650 if (mode == VNC_SHARE_MODE_EXCLUSIVE) { 2651 VncState *client; 2652 QTAILQ_FOREACH(client, &vs->vd->clients, next) { 2653 if (vs == client) { 2654 continue; 2655 } 2656 if (client->share_mode != VNC_SHARE_MODE_EXCLUSIVE && 2657 client->share_mode != VNC_SHARE_MODE_SHARED) { 2658 continue; 2659 } 2660 vnc_disconnect_start(client); 2661 } 2662 } 2663 if (mode == VNC_SHARE_MODE_SHARED) { 2664 if (vs->vd->num_exclusive > 0) { 2665 vnc_disconnect_start(vs); 2666 return 0; 2667 } 2668 } 2669 break; 2670 case VNC_SHARE_POLICY_FORCE_SHARED: 2671 /* 2672 * Policy: Shared connects only. 2673 * Implementation: Disallow clients asking for exclusive access. 2674 * 2675 * Useful for shared desktop sessions where you don't want 2676 * someone forgetting to say -shared when running the vnc 2677 * client disconnect everybody else. 2678 */ 2679 if (mode == VNC_SHARE_MODE_EXCLUSIVE) { 2680 vnc_disconnect_start(vs); 2681 return 0; 2682 } 2683 break; 2684 } 2685 vnc_set_share_mode(vs, mode); 2686 2687 if (vs->vd->num_shared > vs->vd->connections_limit) { 2688 vnc_disconnect_start(vs); 2689 return 0; 2690 } 2691 2692 assert(pixman_image_get_width(vs->vd->server) < 65536 && 2693 pixman_image_get_width(vs->vd->server) >= 0); 2694 assert(pixman_image_get_height(vs->vd->server) < 65536 && 2695 pixman_image_get_height(vs->vd->server) >= 0); 2696 vs->client_width = pixman_image_get_width(vs->vd->server); 2697 vs->client_height = pixman_image_get_height(vs->vd->server); 2698 vnc_write_u16(vs, vs->client_width); 2699 vnc_write_u16(vs, vs->client_height); 2700 2701 pixel_format_message(vs); 2702 2703 if (qemu_name) { 2704 size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name); 2705 if (size > sizeof(buf)) { 2706 size = sizeof(buf); 2707 } 2708 } else { 2709 size = snprintf(buf, sizeof(buf), "QEMU"); 2710 } 2711 2712 vnc_write_u32(vs, size); 2713 vnc_write(vs, buf, size); 2714 vnc_flush(vs); 2715 2716 vnc_client_cache_auth(vs); 2717 vnc_qmp_event(vs, QAPI_EVENT_VNC_INITIALIZED); 2718 2719 vnc_read_when(vs, protocol_client_msg, 1); 2720 2721 return 0; 2722 } 2723 2724 void start_client_init(VncState *vs) 2725 { 2726 vnc_read_when(vs, protocol_client_init, 1); 2727 } 2728 2729 static void authentication_failed(VncState *vs) 2730 { 2731 vnc_write_u32(vs, 1); /* Reject auth */ 2732 if (vs->minor >= 8) { 2733 static const char err[] = "Authentication failed"; 2734 vnc_write_u32(vs, sizeof(err)); 2735 vnc_write(vs, err, sizeof(err)); 2736 } 2737 vnc_flush(vs); 2738 vnc_client_error(vs); 2739 } 2740 2741 static void 2742 vnc_munge_des_rfb_key(unsigned char *key, size_t nkey) 2743 { 2744 size_t i; 2745 for (i = 0; i < nkey; i++) { 2746 uint8_t r = key[i]; 2747 r = (r & 0xf0) >> 4 | (r & 0x0f) << 4; 2748 r = (r & 0xcc) >> 2 | (r & 0x33) << 2; 2749 r = (r & 0xaa) >> 1 | (r & 0x55) << 1; 2750 key[i] = r; 2751 } 2752 } 2753 2754 static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len) 2755 { 2756 unsigned char response[VNC_AUTH_CHALLENGE_SIZE]; 2757 size_t i, pwlen; 2758 unsigned char key[8]; 2759 time_t now = time(NULL); 2760 QCryptoCipher *cipher = NULL; 2761 Error *err = NULL; 2762 2763 if (!vs->vd->password) { 2764 trace_vnc_auth_fail(vs, vs->auth, "password is not set", ""); 2765 goto reject; 2766 } 2767 if (vs->vd->expires < now) { 2768 trace_vnc_auth_fail(vs, vs->auth, "password is expired", ""); 2769 goto reject; 2770 } 2771 2772 memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE); 2773 2774 /* Calculate the expected challenge response */ 2775 pwlen = strlen(vs->vd->password); 2776 for (i=0; i<sizeof(key); i++) 2777 key[i] = i<pwlen ? vs->vd->password[i] : 0; 2778 vnc_munge_des_rfb_key(key, sizeof(key)); 2779 2780 cipher = qcrypto_cipher_new( 2781 QCRYPTO_CIPHER_ALG_DES, 2782 QCRYPTO_CIPHER_MODE_ECB, 2783 key, G_N_ELEMENTS(key), 2784 &err); 2785 if (!cipher) { 2786 trace_vnc_auth_fail(vs, vs->auth, "cannot create cipher", 2787 error_get_pretty(err)); 2788 error_free(err); 2789 goto reject; 2790 } 2791 2792 if (qcrypto_cipher_encrypt(cipher, 2793 vs->challenge, 2794 response, 2795 VNC_AUTH_CHALLENGE_SIZE, 2796 &err) < 0) { 2797 trace_vnc_auth_fail(vs, vs->auth, "cannot encrypt challenge response", 2798 error_get_pretty(err)); 2799 error_free(err); 2800 goto reject; 2801 } 2802 2803 /* Compare expected vs actual challenge response */ 2804 if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) { 2805 trace_vnc_auth_fail(vs, vs->auth, "mis-matched challenge response", ""); 2806 goto reject; 2807 } else { 2808 trace_vnc_auth_pass(vs, vs->auth); 2809 vnc_write_u32(vs, 0); /* Accept auth */ 2810 vnc_flush(vs); 2811 2812 start_client_init(vs); 2813 } 2814 2815 qcrypto_cipher_free(cipher); 2816 return 0; 2817 2818 reject: 2819 authentication_failed(vs); 2820 qcrypto_cipher_free(cipher); 2821 return 0; 2822 } 2823 2824 void start_auth_vnc(VncState *vs) 2825 { 2826 Error *err = NULL; 2827 2828 if (qcrypto_random_bytes(vs->challenge, sizeof(vs->challenge), &err)) { 2829 trace_vnc_auth_fail(vs, vs->auth, "cannot get random bytes", 2830 error_get_pretty(err)); 2831 error_free(err); 2832 authentication_failed(vs); 2833 return; 2834 } 2835 2836 /* Send client a 'random' challenge */ 2837 vnc_write(vs, vs->challenge, sizeof(vs->challenge)); 2838 vnc_flush(vs); 2839 2840 vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge)); 2841 } 2842 2843 2844 static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len) 2845 { 2846 /* We only advertise 1 auth scheme at a time, so client 2847 * must pick the one we sent. Verify this */ 2848 if (data[0] != vs->auth) { /* Reject auth */ 2849 trace_vnc_auth_reject(vs, vs->auth, (int)data[0]); 2850 authentication_failed(vs); 2851 } else { /* Accept requested auth */ 2852 trace_vnc_auth_start(vs, vs->auth); 2853 switch (vs->auth) { 2854 case VNC_AUTH_NONE: 2855 if (vs->minor >= 8) { 2856 vnc_write_u32(vs, 0); /* Accept auth completion */ 2857 vnc_flush(vs); 2858 } 2859 trace_vnc_auth_pass(vs, vs->auth); 2860 start_client_init(vs); 2861 break; 2862 2863 case VNC_AUTH_VNC: 2864 start_auth_vnc(vs); 2865 break; 2866 2867 case VNC_AUTH_VENCRYPT: 2868 start_auth_vencrypt(vs); 2869 break; 2870 2871 #ifdef CONFIG_VNC_SASL 2872 case VNC_AUTH_SASL: 2873 start_auth_sasl(vs); 2874 break; 2875 #endif /* CONFIG_VNC_SASL */ 2876 2877 default: /* Should not be possible, but just in case */ 2878 trace_vnc_auth_fail(vs, vs->auth, "Unhandled auth method", ""); 2879 authentication_failed(vs); 2880 } 2881 } 2882 return 0; 2883 } 2884 2885 static int protocol_version(VncState *vs, uint8_t *version, size_t len) 2886 { 2887 char local[13]; 2888 2889 memcpy(local, version, 12); 2890 local[12] = 0; 2891 2892 if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) { 2893 VNC_DEBUG("Malformed protocol version %s\n", local); 2894 vnc_client_error(vs); 2895 return 0; 2896 } 2897 VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor); 2898 if (vs->major != 3 || 2899 (vs->minor != 3 && 2900 vs->minor != 4 && 2901 vs->minor != 5 && 2902 vs->minor != 7 && 2903 vs->minor != 8)) { 2904 VNC_DEBUG("Unsupported client version\n"); 2905 vnc_write_u32(vs, VNC_AUTH_INVALID); 2906 vnc_flush(vs); 2907 vnc_client_error(vs); 2908 return 0; 2909 } 2910 /* Some broken clients report v3.4 or v3.5, which spec requires to be treated 2911 * as equivalent to v3.3 by servers 2912 */ 2913 if (vs->minor == 4 || vs->minor == 5) 2914 vs->minor = 3; 2915 2916 if (vs->minor == 3) { 2917 trace_vnc_auth_start(vs, vs->auth); 2918 if (vs->auth == VNC_AUTH_NONE) { 2919 vnc_write_u32(vs, vs->auth); 2920 vnc_flush(vs); 2921 trace_vnc_auth_pass(vs, vs->auth); 2922 start_client_init(vs); 2923 } else if (vs->auth == VNC_AUTH_VNC) { 2924 VNC_DEBUG("Tell client VNC auth\n"); 2925 vnc_write_u32(vs, vs->auth); 2926 vnc_flush(vs); 2927 start_auth_vnc(vs); 2928 } else { 2929 trace_vnc_auth_fail(vs, vs->auth, 2930 "Unsupported auth method for v3.3", ""); 2931 vnc_write_u32(vs, VNC_AUTH_INVALID); 2932 vnc_flush(vs); 2933 vnc_client_error(vs); 2934 } 2935 } else { 2936 vnc_write_u8(vs, 1); /* num auth */ 2937 vnc_write_u8(vs, vs->auth); 2938 vnc_read_when(vs, protocol_client_auth, 1); 2939 vnc_flush(vs); 2940 } 2941 2942 return 0; 2943 } 2944 2945 static VncRectStat *vnc_stat_rect(VncDisplay *vd, int x, int y) 2946 { 2947 struct VncSurface *vs = &vd->guest; 2948 2949 return &vs->stats[y / VNC_STAT_RECT][x / VNC_STAT_RECT]; 2950 } 2951 2952 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h) 2953 { 2954 int i, j; 2955 2956 w = (x + w) / VNC_STAT_RECT; 2957 h = (y + h) / VNC_STAT_RECT; 2958 x /= VNC_STAT_RECT; 2959 y /= VNC_STAT_RECT; 2960 2961 for (j = y; j <= h; j++) { 2962 for (i = x; i <= w; i++) { 2963 vs->lossy_rect[j][i] = 1; 2964 } 2965 } 2966 } 2967 2968 static int vnc_refresh_lossy_rect(VncDisplay *vd, int x, int y) 2969 { 2970 VncState *vs; 2971 int sty = y / VNC_STAT_RECT; 2972 int stx = x / VNC_STAT_RECT; 2973 int has_dirty = 0; 2974 2975 y = QEMU_ALIGN_DOWN(y, VNC_STAT_RECT); 2976 x = QEMU_ALIGN_DOWN(x, VNC_STAT_RECT); 2977 2978 QTAILQ_FOREACH(vs, &vd->clients, next) { 2979 int j; 2980 2981 /* kernel send buffers are full -> refresh later */ 2982 if (vs->output.offset) { 2983 continue; 2984 } 2985 2986 if (!vs->lossy_rect[sty][stx]) { 2987 continue; 2988 } 2989 2990 vs->lossy_rect[sty][stx] = 0; 2991 for (j = 0; j < VNC_STAT_RECT; ++j) { 2992 bitmap_set(vs->dirty[y + j], 2993 x / VNC_DIRTY_PIXELS_PER_BIT, 2994 VNC_STAT_RECT / VNC_DIRTY_PIXELS_PER_BIT); 2995 } 2996 has_dirty++; 2997 } 2998 2999 return has_dirty; 3000 } 3001 3002 static int vnc_update_stats(VncDisplay *vd, struct timeval * tv) 3003 { 3004 int width = MIN(pixman_image_get_width(vd->guest.fb), 3005 pixman_image_get_width(vd->server)); 3006 int height = MIN(pixman_image_get_height(vd->guest.fb), 3007 pixman_image_get_height(vd->server)); 3008 int x, y; 3009 struct timeval res; 3010 int has_dirty = 0; 3011 3012 for (y = 0; y < height; y += VNC_STAT_RECT) { 3013 for (x = 0; x < width; x += VNC_STAT_RECT) { 3014 VncRectStat *rect = vnc_stat_rect(vd, x, y); 3015 3016 rect->updated = false; 3017 } 3018 } 3019 3020 qemu_timersub(tv, &VNC_REFRESH_STATS, &res); 3021 3022 if (timercmp(&vd->guest.last_freq_check, &res, >)) { 3023 return has_dirty; 3024 } 3025 vd->guest.last_freq_check = *tv; 3026 3027 for (y = 0; y < height; y += VNC_STAT_RECT) { 3028 for (x = 0; x < width; x += VNC_STAT_RECT) { 3029 VncRectStat *rect= vnc_stat_rect(vd, x, y); 3030 int count = ARRAY_SIZE(rect->times); 3031 struct timeval min, max; 3032 3033 if (!timerisset(&rect->times[count - 1])) { 3034 continue ; 3035 } 3036 3037 max = rect->times[(rect->idx + count - 1) % count]; 3038 qemu_timersub(tv, &max, &res); 3039 3040 if (timercmp(&res, &VNC_REFRESH_LOSSY, >)) { 3041 rect->freq = 0; 3042 has_dirty += vnc_refresh_lossy_rect(vd, x, y); 3043 memset(rect->times, 0, sizeof (rect->times)); 3044 continue ; 3045 } 3046 3047 min = rect->times[rect->idx]; 3048 max = rect->times[(rect->idx + count - 1) % count]; 3049 qemu_timersub(&max, &min, &res); 3050 3051 rect->freq = res.tv_sec + res.tv_usec / 1000000.; 3052 rect->freq /= count; 3053 rect->freq = 1. / rect->freq; 3054 } 3055 } 3056 return has_dirty; 3057 } 3058 3059 double vnc_update_freq(VncState *vs, int x, int y, int w, int h) 3060 { 3061 int i, j; 3062 double total = 0; 3063 int num = 0; 3064 3065 x = QEMU_ALIGN_DOWN(x, VNC_STAT_RECT); 3066 y = QEMU_ALIGN_DOWN(y, VNC_STAT_RECT); 3067 3068 for (j = y; j <= y + h; j += VNC_STAT_RECT) { 3069 for (i = x; i <= x + w; i += VNC_STAT_RECT) { 3070 total += vnc_stat_rect(vs->vd, i, j)->freq; 3071 num++; 3072 } 3073 } 3074 3075 if (num) { 3076 return total / num; 3077 } else { 3078 return 0; 3079 } 3080 } 3081 3082 static void vnc_rect_updated(VncDisplay *vd, int x, int y, struct timeval * tv) 3083 { 3084 VncRectStat *rect; 3085 3086 rect = vnc_stat_rect(vd, x, y); 3087 if (rect->updated) { 3088 return ; 3089 } 3090 rect->times[rect->idx] = *tv; 3091 rect->idx = (rect->idx + 1) % ARRAY_SIZE(rect->times); 3092 rect->updated = true; 3093 } 3094 3095 static int vnc_refresh_server_surface(VncDisplay *vd) 3096 { 3097 int width = MIN(pixman_image_get_width(vd->guest.fb), 3098 pixman_image_get_width(vd->server)); 3099 int height = MIN(pixman_image_get_height(vd->guest.fb), 3100 pixman_image_get_height(vd->server)); 3101 int cmp_bytes, server_stride, line_bytes, guest_ll, guest_stride, y = 0; 3102 uint8_t *guest_row0 = NULL, *server_row0; 3103 VncState *vs; 3104 int has_dirty = 0; 3105 pixman_image_t *tmpbuf = NULL; 3106 unsigned long offset; 3107 int x; 3108 uint8_t *guest_ptr, *server_ptr; 3109 3110 struct timeval tv = { 0, 0 }; 3111 3112 if (!vd->non_adaptive) { 3113 gettimeofday(&tv, NULL); 3114 has_dirty = vnc_update_stats(vd, &tv); 3115 } 3116 3117 offset = find_next_bit((unsigned long *) &vd->guest.dirty, 3118 height * VNC_DIRTY_BPL(&vd->guest), 0); 3119 if (offset == height * VNC_DIRTY_BPL(&vd->guest)) { 3120 /* no dirty bits in guest surface */ 3121 return has_dirty; 3122 } 3123 3124 /* 3125 * Walk through the guest dirty map. 3126 * Check and copy modified bits from guest to server surface. 3127 * Update server dirty map. 3128 */ 3129 server_row0 = (uint8_t *)pixman_image_get_data(vd->server); 3130 server_stride = guest_stride = guest_ll = 3131 pixman_image_get_stride(vd->server); 3132 cmp_bytes = MIN(VNC_DIRTY_PIXELS_PER_BIT * VNC_SERVER_FB_BYTES, 3133 server_stride); 3134 if (vd->guest.format != VNC_SERVER_FB_FORMAT) { 3135 int width = pixman_image_get_width(vd->server); 3136 tmpbuf = qemu_pixman_linebuf_create(VNC_SERVER_FB_FORMAT, width); 3137 } else { 3138 int guest_bpp = 3139 PIXMAN_FORMAT_BPP(pixman_image_get_format(vd->guest.fb)); 3140 guest_row0 = (uint8_t *)pixman_image_get_data(vd->guest.fb); 3141 guest_stride = pixman_image_get_stride(vd->guest.fb); 3142 guest_ll = pixman_image_get_width(vd->guest.fb) 3143 * DIV_ROUND_UP(guest_bpp, 8); 3144 } 3145 line_bytes = MIN(server_stride, guest_ll); 3146 3147 for (;;) { 3148 y = offset / VNC_DIRTY_BPL(&vd->guest); 3149 x = offset % VNC_DIRTY_BPL(&vd->guest); 3150 3151 server_ptr = server_row0 + y * server_stride + x * cmp_bytes; 3152 3153 if (vd->guest.format != VNC_SERVER_FB_FORMAT) { 3154 qemu_pixman_linebuf_fill(tmpbuf, vd->guest.fb, width, 0, y); 3155 guest_ptr = (uint8_t *)pixman_image_get_data(tmpbuf); 3156 } else { 3157 guest_ptr = guest_row0 + y * guest_stride; 3158 } 3159 guest_ptr += x * cmp_bytes; 3160 3161 for (; x < DIV_ROUND_UP(width, VNC_DIRTY_PIXELS_PER_BIT); 3162 x++, guest_ptr += cmp_bytes, server_ptr += cmp_bytes) { 3163 int _cmp_bytes = cmp_bytes; 3164 if (!test_and_clear_bit(x, vd->guest.dirty[y])) { 3165 continue; 3166 } 3167 if ((x + 1) * cmp_bytes > line_bytes) { 3168 _cmp_bytes = line_bytes - x * cmp_bytes; 3169 } 3170 assert(_cmp_bytes >= 0); 3171 if (memcmp(server_ptr, guest_ptr, _cmp_bytes) == 0) { 3172 continue; 3173 } 3174 memcpy(server_ptr, guest_ptr, _cmp_bytes); 3175 if (!vd->non_adaptive) { 3176 vnc_rect_updated(vd, x * VNC_DIRTY_PIXELS_PER_BIT, 3177 y, &tv); 3178 } 3179 QTAILQ_FOREACH(vs, &vd->clients, next) { 3180 set_bit(x, vs->dirty[y]); 3181 } 3182 has_dirty++; 3183 } 3184 3185 y++; 3186 offset = find_next_bit((unsigned long *) &vd->guest.dirty, 3187 height * VNC_DIRTY_BPL(&vd->guest), 3188 y * VNC_DIRTY_BPL(&vd->guest)); 3189 if (offset == height * VNC_DIRTY_BPL(&vd->guest)) { 3190 /* no more dirty bits */ 3191 break; 3192 } 3193 } 3194 qemu_pixman_image_unref(tmpbuf); 3195 return has_dirty; 3196 } 3197 3198 static void vnc_refresh(DisplayChangeListener *dcl) 3199 { 3200 VncDisplay *vd = container_of(dcl, VncDisplay, dcl); 3201 VncState *vs, *vn; 3202 int has_dirty, rects = 0; 3203 3204 if (QTAILQ_EMPTY(&vd->clients)) { 3205 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_MAX); 3206 return; 3207 } 3208 3209 graphic_hw_update(vd->dcl.con); 3210 3211 if (vnc_trylock_display(vd)) { 3212 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); 3213 return; 3214 } 3215 3216 has_dirty = vnc_refresh_server_surface(vd); 3217 vnc_unlock_display(vd); 3218 3219 QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) { 3220 rects += vnc_update_client(vs, has_dirty); 3221 /* vs might be free()ed here */ 3222 } 3223 3224 if (has_dirty && rects) { 3225 vd->dcl.update_interval /= 2; 3226 if (vd->dcl.update_interval < VNC_REFRESH_INTERVAL_BASE) { 3227 vd->dcl.update_interval = VNC_REFRESH_INTERVAL_BASE; 3228 } 3229 } else { 3230 vd->dcl.update_interval += VNC_REFRESH_INTERVAL_INC; 3231 if (vd->dcl.update_interval > VNC_REFRESH_INTERVAL_MAX) { 3232 vd->dcl.update_interval = VNC_REFRESH_INTERVAL_MAX; 3233 } 3234 } 3235 } 3236 3237 static void vnc_connect(VncDisplay *vd, QIOChannelSocket *sioc, 3238 bool skipauth, bool websocket) 3239 { 3240 VncState *vs = g_new0(VncState, 1); 3241 bool first_client = QTAILQ_EMPTY(&vd->clients); 3242 int i; 3243 3244 trace_vnc_client_connect(vs, sioc); 3245 vs->zrle = g_new0(VncZrle, 1); 3246 vs->tight = g_new0(VncTight, 1); 3247 vs->magic = VNC_MAGIC; 3248 vs->sioc = sioc; 3249 object_ref(OBJECT(vs->sioc)); 3250 vs->ioc = QIO_CHANNEL(sioc); 3251 object_ref(OBJECT(vs->ioc)); 3252 vs->vd = vd; 3253 3254 buffer_init(&vs->input, "vnc-input/%p", sioc); 3255 buffer_init(&vs->output, "vnc-output/%p", sioc); 3256 buffer_init(&vs->jobs_buffer, "vnc-jobs_buffer/%p", sioc); 3257 3258 buffer_init(&vs->tight->tight, "vnc-tight/%p", sioc); 3259 buffer_init(&vs->tight->zlib, "vnc-tight-zlib/%p", sioc); 3260 buffer_init(&vs->tight->gradient, "vnc-tight-gradient/%p", sioc); 3261 #ifdef CONFIG_VNC_JPEG 3262 buffer_init(&vs->tight->jpeg, "vnc-tight-jpeg/%p", sioc); 3263 #endif 3264 #ifdef CONFIG_PNG 3265 buffer_init(&vs->tight->png, "vnc-tight-png/%p", sioc); 3266 #endif 3267 buffer_init(&vs->zlib.zlib, "vnc-zlib/%p", sioc); 3268 buffer_init(&vs->zrle->zrle, "vnc-zrle/%p", sioc); 3269 buffer_init(&vs->zrle->fb, "vnc-zrle-fb/%p", sioc); 3270 buffer_init(&vs->zrle->zlib, "vnc-zrle-zlib/%p", sioc); 3271 3272 if (skipauth) { 3273 vs->auth = VNC_AUTH_NONE; 3274 vs->subauth = VNC_AUTH_INVALID; 3275 } else { 3276 if (websocket) { 3277 vs->auth = vd->ws_auth; 3278 vs->subauth = VNC_AUTH_INVALID; 3279 } else { 3280 vs->auth = vd->auth; 3281 vs->subauth = vd->subauth; 3282 } 3283 } 3284 VNC_DEBUG("Client sioc=%p ws=%d auth=%d subauth=%d\n", 3285 sioc, websocket, vs->auth, vs->subauth); 3286 3287 vs->lossy_rect = g_malloc0(VNC_STAT_ROWS * sizeof (*vs->lossy_rect)); 3288 for (i = 0; i < VNC_STAT_ROWS; ++i) { 3289 vs->lossy_rect[i] = g_new0(uint8_t, VNC_STAT_COLS); 3290 } 3291 3292 VNC_DEBUG("New client on socket %p\n", vs->sioc); 3293 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); 3294 qio_channel_set_blocking(vs->ioc, false, NULL); 3295 if (vs->ioc_tag) { 3296 g_source_remove(vs->ioc_tag); 3297 } 3298 if (websocket) { 3299 vs->websocket = 1; 3300 if (vd->tlscreds) { 3301 vs->ioc_tag = qio_channel_add_watch( 3302 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 3303 vncws_tls_handshake_io, vs, NULL); 3304 } else { 3305 vs->ioc_tag = qio_channel_add_watch( 3306 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 3307 vncws_handshake_io, vs, NULL); 3308 } 3309 } else { 3310 vs->ioc_tag = qio_channel_add_watch( 3311 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 3312 vnc_client_io, vs, NULL); 3313 } 3314 3315 vnc_client_cache_addr(vs); 3316 vnc_qmp_event(vs, QAPI_EVENT_VNC_CONNECTED); 3317 vnc_set_share_mode(vs, VNC_SHARE_MODE_CONNECTING); 3318 3319 vs->last_x = -1; 3320 vs->last_y = -1; 3321 3322 vs->as.freq = 44100; 3323 vs->as.nchannels = 2; 3324 vs->as.fmt = AUDIO_FORMAT_S16; 3325 vs->as.endianness = 0; 3326 3327 qemu_mutex_init(&vs->output_mutex); 3328 vs->bh = qemu_bh_new(vnc_jobs_bh, vs); 3329 3330 QTAILQ_INSERT_TAIL(&vd->clients, vs, next); 3331 if (first_client) { 3332 vnc_update_server_surface(vd); 3333 } 3334 3335 graphic_hw_update(vd->dcl.con); 3336 3337 if (!vs->websocket) { 3338 vnc_start_protocol(vs); 3339 } 3340 3341 if (vd->num_connecting > vd->connections_limit) { 3342 QTAILQ_FOREACH(vs, &vd->clients, next) { 3343 if (vs->share_mode == VNC_SHARE_MODE_CONNECTING) { 3344 vnc_disconnect_start(vs); 3345 return; 3346 } 3347 } 3348 } 3349 } 3350 3351 void vnc_start_protocol(VncState *vs) 3352 { 3353 vnc_write(vs, "RFB 003.008\n", 12); 3354 vnc_flush(vs); 3355 vnc_read_when(vs, protocol_version, 12); 3356 3357 vs->mouse_mode_notifier.notify = check_pointer_type_change; 3358 qemu_add_mouse_mode_change_notifier(&vs->mouse_mode_notifier); 3359 } 3360 3361 static void vnc_listen_io(QIONetListener *listener, 3362 QIOChannelSocket *cioc, 3363 void *opaque) 3364 { 3365 VncDisplay *vd = opaque; 3366 bool isWebsock = listener == vd->wslistener; 3367 3368 qio_channel_set_name(QIO_CHANNEL(cioc), 3369 isWebsock ? "vnc-ws-server" : "vnc-server"); 3370 qio_channel_set_delay(QIO_CHANNEL(cioc), false); 3371 vnc_connect(vd, cioc, false, isWebsock); 3372 } 3373 3374 static const DisplayChangeListenerOps dcl_ops = { 3375 .dpy_name = "vnc", 3376 .dpy_refresh = vnc_refresh, 3377 .dpy_gfx_update = vnc_dpy_update, 3378 .dpy_gfx_switch = vnc_dpy_switch, 3379 .dpy_gfx_check_format = qemu_pixman_check_format, 3380 .dpy_mouse_set = vnc_mouse_set, 3381 .dpy_cursor_define = vnc_dpy_cursor_define, 3382 }; 3383 3384 void vnc_display_init(const char *id, Error **errp) 3385 { 3386 VncDisplay *vd; 3387 3388 if (vnc_display_find(id) != NULL) { 3389 return; 3390 } 3391 vd = g_malloc0(sizeof(*vd)); 3392 3393 vd->id = strdup(id); 3394 QTAILQ_INSERT_TAIL(&vnc_displays, vd, next); 3395 3396 QTAILQ_INIT(&vd->clients); 3397 vd->expires = TIME_MAX; 3398 3399 if (keyboard_layout) { 3400 trace_vnc_key_map_init(keyboard_layout); 3401 vd->kbd_layout = init_keyboard_layout(name2keysym, 3402 keyboard_layout, errp); 3403 } else { 3404 vd->kbd_layout = init_keyboard_layout(name2keysym, "en-us", errp); 3405 } 3406 3407 if (!vd->kbd_layout) { 3408 return; 3409 } 3410 3411 vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; 3412 vd->connections_limit = 32; 3413 3414 qemu_mutex_init(&vd->mutex); 3415 vnc_start_worker_thread(); 3416 3417 vd->dcl.ops = &dcl_ops; 3418 register_displaychangelistener(&vd->dcl); 3419 vd->kbd = qkbd_state_init(vd->dcl.con); 3420 } 3421 3422 3423 static void vnc_display_close(VncDisplay *vd) 3424 { 3425 if (!vd) { 3426 return; 3427 } 3428 vd->is_unix = false; 3429 3430 if (vd->listener) { 3431 qio_net_listener_disconnect(vd->listener); 3432 object_unref(OBJECT(vd->listener)); 3433 } 3434 vd->listener = NULL; 3435 3436 if (vd->wslistener) { 3437 qio_net_listener_disconnect(vd->wslistener); 3438 object_unref(OBJECT(vd->wslistener)); 3439 } 3440 vd->wslistener = NULL; 3441 3442 vd->auth = VNC_AUTH_INVALID; 3443 vd->subauth = VNC_AUTH_INVALID; 3444 if (vd->tlscreds) { 3445 object_unref(OBJECT(vd->tlscreds)); 3446 vd->tlscreds = NULL; 3447 } 3448 if (vd->tlsauthz) { 3449 object_unparent(OBJECT(vd->tlsauthz)); 3450 vd->tlsauthz = NULL; 3451 } 3452 g_free(vd->tlsauthzid); 3453 vd->tlsauthzid = NULL; 3454 if (vd->lock_key_sync) { 3455 qemu_remove_led_event_handler(vd->led); 3456 vd->led = NULL; 3457 } 3458 #ifdef CONFIG_VNC_SASL 3459 if (vd->sasl.authz) { 3460 object_unparent(OBJECT(vd->sasl.authz)); 3461 vd->sasl.authz = NULL; 3462 } 3463 g_free(vd->sasl.authzid); 3464 vd->sasl.authzid = NULL; 3465 #endif 3466 } 3467 3468 int vnc_display_password(const char *id, const char *password) 3469 { 3470 VncDisplay *vd = vnc_display_find(id); 3471 3472 if (!vd) { 3473 return -EINVAL; 3474 } 3475 if (vd->auth == VNC_AUTH_NONE) { 3476 error_printf_unless_qmp("If you want use passwords please enable " 3477 "password auth using '-vnc ${dpy},password'.\n"); 3478 return -EINVAL; 3479 } 3480 3481 g_free(vd->password); 3482 vd->password = g_strdup(password); 3483 3484 return 0; 3485 } 3486 3487 int vnc_display_pw_expire(const char *id, time_t expires) 3488 { 3489 VncDisplay *vd = vnc_display_find(id); 3490 3491 if (!vd) { 3492 return -EINVAL; 3493 } 3494 3495 vd->expires = expires; 3496 return 0; 3497 } 3498 3499 static void vnc_display_print_local_addr(VncDisplay *vd) 3500 { 3501 SocketAddress *addr; 3502 3503 if (!vd->listener || !vd->listener->nsioc) { 3504 return; 3505 } 3506 3507 addr = qio_channel_socket_get_local_address(vd->listener->sioc[0], NULL); 3508 if (!addr) { 3509 return; 3510 } 3511 3512 if (addr->type != SOCKET_ADDRESS_TYPE_INET) { 3513 qapi_free_SocketAddress(addr); 3514 return; 3515 } 3516 error_printf_unless_qmp("VNC server running on %s:%s\n", 3517 addr->u.inet.host, 3518 addr->u.inet.port); 3519 qapi_free_SocketAddress(addr); 3520 } 3521 3522 static QemuOptsList qemu_vnc_opts = { 3523 .name = "vnc", 3524 .head = QTAILQ_HEAD_INITIALIZER(qemu_vnc_opts.head), 3525 .implied_opt_name = "vnc", 3526 .desc = { 3527 { 3528 .name = "vnc", 3529 .type = QEMU_OPT_STRING, 3530 },{ 3531 .name = "websocket", 3532 .type = QEMU_OPT_STRING, 3533 },{ 3534 .name = "tls-creds", 3535 .type = QEMU_OPT_STRING, 3536 },{ 3537 .name = "share", 3538 .type = QEMU_OPT_STRING, 3539 },{ 3540 .name = "display", 3541 .type = QEMU_OPT_STRING, 3542 },{ 3543 .name = "head", 3544 .type = QEMU_OPT_NUMBER, 3545 },{ 3546 .name = "connections", 3547 .type = QEMU_OPT_NUMBER, 3548 },{ 3549 .name = "to", 3550 .type = QEMU_OPT_NUMBER, 3551 },{ 3552 .name = "ipv4", 3553 .type = QEMU_OPT_BOOL, 3554 },{ 3555 .name = "ipv6", 3556 .type = QEMU_OPT_BOOL, 3557 },{ 3558 .name = "password", 3559 .type = QEMU_OPT_BOOL, 3560 },{ 3561 .name = "password-secret", 3562 .type = QEMU_OPT_STRING, 3563 },{ 3564 .name = "reverse", 3565 .type = QEMU_OPT_BOOL, 3566 },{ 3567 .name = "lock-key-sync", 3568 .type = QEMU_OPT_BOOL, 3569 },{ 3570 .name = "key-delay-ms", 3571 .type = QEMU_OPT_NUMBER, 3572 },{ 3573 .name = "sasl", 3574 .type = QEMU_OPT_BOOL, 3575 },{ 3576 .name = "tls-authz", 3577 .type = QEMU_OPT_STRING, 3578 },{ 3579 .name = "sasl-authz", 3580 .type = QEMU_OPT_STRING, 3581 },{ 3582 .name = "lossy", 3583 .type = QEMU_OPT_BOOL, 3584 },{ 3585 .name = "non-adaptive", 3586 .type = QEMU_OPT_BOOL, 3587 },{ 3588 .name = "audiodev", 3589 .type = QEMU_OPT_STRING, 3590 },{ 3591 .name = "power-control", 3592 .type = QEMU_OPT_BOOL, 3593 }, 3594 { /* end of list */ } 3595 }, 3596 }; 3597 3598 3599 static int 3600 vnc_display_setup_auth(int *auth, 3601 int *subauth, 3602 QCryptoTLSCreds *tlscreds, 3603 bool password, 3604 bool sasl, 3605 bool websocket, 3606 Error **errp) 3607 { 3608 /* 3609 * We have a choice of 3 authentication options 3610 * 3611 * 1. none 3612 * 2. vnc 3613 * 3. sasl 3614 * 3615 * The channel can be run in 2 modes 3616 * 3617 * 1. clear 3618 * 2. tls 3619 * 3620 * And TLS can use 2 types of credentials 3621 * 3622 * 1. anon 3623 * 2. x509 3624 * 3625 * We thus have 9 possible logical combinations 3626 * 3627 * 1. clear + none 3628 * 2. clear + vnc 3629 * 3. clear + sasl 3630 * 4. tls + anon + none 3631 * 5. tls + anon + vnc 3632 * 6. tls + anon + sasl 3633 * 7. tls + x509 + none 3634 * 8. tls + x509 + vnc 3635 * 9. tls + x509 + sasl 3636 * 3637 * These need to be mapped into the VNC auth schemes 3638 * in an appropriate manner. In regular VNC, all the 3639 * TLS options get mapped into VNC_AUTH_VENCRYPT 3640 * sub-auth types. 3641 * 3642 * In websockets, the https:// protocol already provides 3643 * TLS support, so there is no need to make use of the 3644 * VeNCrypt extension. Furthermore, websockets browser 3645 * clients could not use VeNCrypt even if they wanted to, 3646 * as they cannot control when the TLS handshake takes 3647 * place. Thus there is no option but to rely on https://, 3648 * meaning combinations 4->6 and 7->9 will be mapped to 3649 * VNC auth schemes in the same way as combos 1->3. 3650 * 3651 * Regardless of fact that we have a different mapping to 3652 * VNC auth mechs for plain VNC vs websockets VNC, the end 3653 * result has the same security characteristics. 3654 */ 3655 if (websocket || !tlscreds) { 3656 if (password) { 3657 VNC_DEBUG("Initializing VNC server with password auth\n"); 3658 *auth = VNC_AUTH_VNC; 3659 } else if (sasl) { 3660 VNC_DEBUG("Initializing VNC server with SASL auth\n"); 3661 *auth = VNC_AUTH_SASL; 3662 } else { 3663 VNC_DEBUG("Initializing VNC server with no auth\n"); 3664 *auth = VNC_AUTH_NONE; 3665 } 3666 *subauth = VNC_AUTH_INVALID; 3667 } else { 3668 bool is_x509 = object_dynamic_cast(OBJECT(tlscreds), 3669 TYPE_QCRYPTO_TLS_CREDS_X509) != NULL; 3670 bool is_anon = object_dynamic_cast(OBJECT(tlscreds), 3671 TYPE_QCRYPTO_TLS_CREDS_ANON) != NULL; 3672 3673 if (!is_x509 && !is_anon) { 3674 error_setg(errp, 3675 "Unsupported TLS cred type %s", 3676 object_get_typename(OBJECT(tlscreds))); 3677 return -1; 3678 } 3679 *auth = VNC_AUTH_VENCRYPT; 3680 if (password) { 3681 if (is_x509) { 3682 VNC_DEBUG("Initializing VNC server with x509 password auth\n"); 3683 *subauth = VNC_AUTH_VENCRYPT_X509VNC; 3684 } else { 3685 VNC_DEBUG("Initializing VNC server with TLS password auth\n"); 3686 *subauth = VNC_AUTH_VENCRYPT_TLSVNC; 3687 } 3688 3689 } else if (sasl) { 3690 if (is_x509) { 3691 VNC_DEBUG("Initializing VNC server with x509 SASL auth\n"); 3692 *subauth = VNC_AUTH_VENCRYPT_X509SASL; 3693 } else { 3694 VNC_DEBUG("Initializing VNC server with TLS SASL auth\n"); 3695 *subauth = VNC_AUTH_VENCRYPT_TLSSASL; 3696 } 3697 } else { 3698 if (is_x509) { 3699 VNC_DEBUG("Initializing VNC server with x509 no auth\n"); 3700 *subauth = VNC_AUTH_VENCRYPT_X509NONE; 3701 } else { 3702 VNC_DEBUG("Initializing VNC server with TLS no auth\n"); 3703 *subauth = VNC_AUTH_VENCRYPT_TLSNONE; 3704 } 3705 } 3706 } 3707 return 0; 3708 } 3709 3710 3711 static int vnc_display_get_address(const char *addrstr, 3712 bool websocket, 3713 bool reverse, 3714 int displaynum, 3715 int to, 3716 bool has_ipv4, 3717 bool has_ipv6, 3718 bool ipv4, 3719 bool ipv6, 3720 SocketAddress **retaddr, 3721 Error **errp) 3722 { 3723 int ret = -1; 3724 SocketAddress *addr = NULL; 3725 3726 addr = g_new0(SocketAddress, 1); 3727 3728 if (strncmp(addrstr, "unix:", 5) == 0) { 3729 addr->type = SOCKET_ADDRESS_TYPE_UNIX; 3730 addr->u.q_unix.path = g_strdup(addrstr + 5); 3731 3732 if (websocket) { 3733 error_setg(errp, "UNIX sockets not supported with websock"); 3734 goto cleanup; 3735 } 3736 3737 if (to) { 3738 error_setg(errp, "Port range not support with UNIX socket"); 3739 goto cleanup; 3740 } 3741 ret = 0; 3742 } else { 3743 const char *port; 3744 size_t hostlen; 3745 unsigned long long baseport = 0; 3746 InetSocketAddress *inet; 3747 3748 port = strrchr(addrstr, ':'); 3749 if (!port) { 3750 if (websocket) { 3751 hostlen = 0; 3752 port = addrstr; 3753 } else { 3754 error_setg(errp, "no vnc port specified"); 3755 goto cleanup; 3756 } 3757 } else { 3758 hostlen = port - addrstr; 3759 port++; 3760 if (*port == '\0') { 3761 error_setg(errp, "vnc port cannot be empty"); 3762 goto cleanup; 3763 } 3764 } 3765 3766 addr->type = SOCKET_ADDRESS_TYPE_INET; 3767 inet = &addr->u.inet; 3768 if (addrstr[0] == '[' && addrstr[hostlen - 1] == ']') { 3769 inet->host = g_strndup(addrstr + 1, hostlen - 2); 3770 } else { 3771 inet->host = g_strndup(addrstr, hostlen); 3772 } 3773 /* plain VNC port is just an offset, for websocket 3774 * port is absolute */ 3775 if (websocket) { 3776 if (g_str_equal(addrstr, "") || 3777 g_str_equal(addrstr, "on")) { 3778 if (displaynum == -1) { 3779 error_setg(errp, "explicit websocket port is required"); 3780 goto cleanup; 3781 } 3782 inet->port = g_strdup_printf( 3783 "%d", displaynum + 5700); 3784 if (to) { 3785 inet->has_to = true; 3786 inet->to = to + 5700; 3787 } 3788 } else { 3789 inet->port = g_strdup(port); 3790 } 3791 } else { 3792 int offset = reverse ? 0 : 5900; 3793 if (parse_uint_full(port, &baseport, 10) < 0) { 3794 error_setg(errp, "can't convert to a number: %s", port); 3795 goto cleanup; 3796 } 3797 if (baseport > 65535 || 3798 baseport + offset > 65535) { 3799 error_setg(errp, "port %s out of range", port); 3800 goto cleanup; 3801 } 3802 inet->port = g_strdup_printf( 3803 "%d", (int)baseport + offset); 3804 3805 if (to) { 3806 inet->has_to = true; 3807 inet->to = to + offset; 3808 } 3809 } 3810 3811 inet->ipv4 = ipv4; 3812 inet->has_ipv4 = has_ipv4; 3813 inet->ipv6 = ipv6; 3814 inet->has_ipv6 = has_ipv6; 3815 3816 ret = baseport; 3817 } 3818 3819 *retaddr = addr; 3820 3821 cleanup: 3822 if (ret < 0) { 3823 qapi_free_SocketAddress(addr); 3824 } 3825 return ret; 3826 } 3827 3828 static int vnc_display_get_addresses(QemuOpts *opts, 3829 bool reverse, 3830 SocketAddressList **saddr_list_ret, 3831 SocketAddressList **wsaddr_list_ret, 3832 Error **errp) 3833 { 3834 SocketAddress *saddr = NULL; 3835 SocketAddress *wsaddr = NULL; 3836 g_autoptr(SocketAddressList) saddr_list = NULL; 3837 SocketAddressList **saddr_tail = &saddr_list; 3838 SocketAddress *single_saddr = NULL; 3839 g_autoptr(SocketAddressList) wsaddr_list = NULL; 3840 SocketAddressList **wsaddr_tail = &wsaddr_list; 3841 QemuOptsIter addriter; 3842 const char *addr; 3843 int to = qemu_opt_get_number(opts, "to", 0); 3844 bool has_ipv4 = qemu_opt_get(opts, "ipv4"); 3845 bool has_ipv6 = qemu_opt_get(opts, "ipv6"); 3846 bool ipv4 = qemu_opt_get_bool(opts, "ipv4", false); 3847 bool ipv6 = qemu_opt_get_bool(opts, "ipv6", false); 3848 int displaynum = -1; 3849 3850 addr = qemu_opt_get(opts, "vnc"); 3851 if (addr == NULL || g_str_equal(addr, "none")) { 3852 return 0; 3853 } 3854 if (qemu_opt_get(opts, "websocket") && 3855 !qcrypto_hash_supports(QCRYPTO_HASH_ALG_SHA1)) { 3856 error_setg(errp, 3857 "SHA1 hash support is required for websockets"); 3858 return -1; 3859 } 3860 3861 qemu_opt_iter_init(&addriter, opts, "vnc"); 3862 while ((addr = qemu_opt_iter_next(&addriter)) != NULL) { 3863 int rv; 3864 rv = vnc_display_get_address(addr, false, reverse, 0, to, 3865 has_ipv4, has_ipv6, 3866 ipv4, ipv6, 3867 &saddr, errp); 3868 if (rv < 0) { 3869 return -1; 3870 } 3871 /* Historical compat - first listen address can be used 3872 * to set the default websocket port 3873 */ 3874 if (displaynum == -1) { 3875 displaynum = rv; 3876 } 3877 QAPI_LIST_APPEND(saddr_tail, saddr); 3878 } 3879 3880 if (saddr_list && !saddr_list->next) { 3881 single_saddr = saddr_list->value; 3882 } else { 3883 /* 3884 * If we had multiple primary displays, we don't do defaults 3885 * for websocket, and require explicit config instead. 3886 */ 3887 displaynum = -1; 3888 } 3889 3890 qemu_opt_iter_init(&addriter, opts, "websocket"); 3891 while ((addr = qemu_opt_iter_next(&addriter)) != NULL) { 3892 if (vnc_display_get_address(addr, true, reverse, displaynum, to, 3893 has_ipv4, has_ipv6, 3894 ipv4, ipv6, 3895 &wsaddr, errp) < 0) { 3896 return -1; 3897 } 3898 3899 /* Historical compat - if only a single listen address was 3900 * provided, then this is used to set the default listen 3901 * address for websocket too 3902 */ 3903 if (single_saddr && 3904 single_saddr->type == SOCKET_ADDRESS_TYPE_INET && 3905 wsaddr->type == SOCKET_ADDRESS_TYPE_INET && 3906 g_str_equal(wsaddr->u.inet.host, "") && 3907 !g_str_equal(single_saddr->u.inet.host, "")) { 3908 g_free(wsaddr->u.inet.host); 3909 wsaddr->u.inet.host = g_strdup(single_saddr->u.inet.host); 3910 } 3911 3912 QAPI_LIST_APPEND(wsaddr_tail, wsaddr); 3913 } 3914 3915 *saddr_list_ret = g_steal_pointer(&saddr_list); 3916 *wsaddr_list_ret = g_steal_pointer(&wsaddr_list); 3917 return 0; 3918 } 3919 3920 static int vnc_display_connect(VncDisplay *vd, 3921 SocketAddressList *saddr_list, 3922 SocketAddressList *wsaddr_list, 3923 Error **errp) 3924 { 3925 /* connect to viewer */ 3926 QIOChannelSocket *sioc = NULL; 3927 if (wsaddr_list) { 3928 error_setg(errp, "Cannot use websockets in reverse mode"); 3929 return -1; 3930 } 3931 if (!saddr_list || saddr_list->next) { 3932 error_setg(errp, "Expected a single address in reverse mode"); 3933 return -1; 3934 } 3935 /* TODO SOCKET_ADDRESS_TYPE_FD when fd has AF_UNIX */ 3936 vd->is_unix = saddr_list->value->type == SOCKET_ADDRESS_TYPE_UNIX; 3937 sioc = qio_channel_socket_new(); 3938 qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-reverse"); 3939 if (qio_channel_socket_connect_sync(sioc, saddr_list->value, errp) < 0) { 3940 object_unref(OBJECT(sioc)); 3941 return -1; 3942 } 3943 vnc_connect(vd, sioc, false, false); 3944 object_unref(OBJECT(sioc)); 3945 return 0; 3946 } 3947 3948 3949 static int vnc_display_listen(VncDisplay *vd, 3950 SocketAddressList *saddr_list, 3951 SocketAddressList *wsaddr_list, 3952 Error **errp) 3953 { 3954 SocketAddressList *el; 3955 3956 if (saddr_list) { 3957 vd->listener = qio_net_listener_new(); 3958 qio_net_listener_set_name(vd->listener, "vnc-listen"); 3959 for (el = saddr_list; el; el = el->next) { 3960 if (qio_net_listener_open_sync(vd->listener, 3961 el->value, 1, 3962 errp) < 0) { 3963 return -1; 3964 } 3965 } 3966 3967 qio_net_listener_set_client_func(vd->listener, 3968 vnc_listen_io, vd, NULL); 3969 } 3970 3971 if (wsaddr_list) { 3972 vd->wslistener = qio_net_listener_new(); 3973 qio_net_listener_set_name(vd->wslistener, "vnc-ws-listen"); 3974 for (el = wsaddr_list; el; el = el->next) { 3975 if (qio_net_listener_open_sync(vd->wslistener, 3976 el->value, 1, 3977 errp) < 0) { 3978 return -1; 3979 } 3980 } 3981 3982 qio_net_listener_set_client_func(vd->wslistener, 3983 vnc_listen_io, vd, NULL); 3984 } 3985 3986 return 0; 3987 } 3988 3989 bool vnc_display_update(DisplayUpdateOptionsVNC *arg, Error **errp) 3990 { 3991 VncDisplay *vd = vnc_display_find(NULL); 3992 3993 if (!vd) { 3994 error_setg(errp, "Can not find vnc display"); 3995 return false; 3996 } 3997 3998 if (arg->has_addresses) { 3999 if (vd->listener) { 4000 qio_net_listener_disconnect(vd->listener); 4001 object_unref(OBJECT(vd->listener)); 4002 vd->listener = NULL; 4003 } 4004 4005 if (vnc_display_listen(vd, arg->addresses, NULL, errp) < 0) { 4006 return false; 4007 } 4008 } 4009 4010 return true; 4011 } 4012 4013 void vnc_display_open(const char *id, Error **errp) 4014 { 4015 VncDisplay *vd = vnc_display_find(id); 4016 QemuOpts *opts = qemu_opts_find(&qemu_vnc_opts, id); 4017 g_autoptr(SocketAddressList) saddr_list = NULL; 4018 g_autoptr(SocketAddressList) wsaddr_list = NULL; 4019 const char *share, *device_id; 4020 QemuConsole *con; 4021 bool password = false; 4022 bool reverse = false; 4023 const char *credid; 4024 bool sasl = false; 4025 const char *tlsauthz; 4026 const char *saslauthz; 4027 int lock_key_sync = 1; 4028 int key_delay_ms; 4029 const char *audiodev; 4030 const char *passwordSecret; 4031 4032 if (!vd) { 4033 error_setg(errp, "VNC display not active"); 4034 return; 4035 } 4036 vnc_display_close(vd); 4037 4038 if (!opts) { 4039 return; 4040 } 4041 4042 reverse = qemu_opt_get_bool(opts, "reverse", false); 4043 if (vnc_display_get_addresses(opts, reverse, &saddr_list, &wsaddr_list, 4044 errp) < 0) { 4045 goto fail; 4046 } 4047 4048 4049 passwordSecret = qemu_opt_get(opts, "password-secret"); 4050 if (passwordSecret) { 4051 if (qemu_opt_get(opts, "password")) { 4052 error_setg(errp, 4053 "'password' flag is redundant with 'password-secret'"); 4054 goto fail; 4055 } 4056 vd->password = qcrypto_secret_lookup_as_utf8(passwordSecret, 4057 errp); 4058 if (!vd->password) { 4059 goto fail; 4060 } 4061 password = true; 4062 } else { 4063 password = qemu_opt_get_bool(opts, "password", false); 4064 } 4065 if (password) { 4066 if (!qcrypto_cipher_supports( 4067 QCRYPTO_CIPHER_ALG_DES, QCRYPTO_CIPHER_MODE_ECB)) { 4068 error_setg(errp, 4069 "Cipher backend does not support DES algorithm"); 4070 goto fail; 4071 } 4072 } 4073 4074 lock_key_sync = qemu_opt_get_bool(opts, "lock-key-sync", true); 4075 key_delay_ms = qemu_opt_get_number(opts, "key-delay-ms", 10); 4076 sasl = qemu_opt_get_bool(opts, "sasl", false); 4077 #ifndef CONFIG_VNC_SASL 4078 if (sasl) { 4079 error_setg(errp, "VNC SASL auth requires cyrus-sasl support"); 4080 goto fail; 4081 } 4082 #endif /* CONFIG_VNC_SASL */ 4083 credid = qemu_opt_get(opts, "tls-creds"); 4084 if (credid) { 4085 Object *creds; 4086 creds = object_resolve_path_component( 4087 object_get_objects_root(), credid); 4088 if (!creds) { 4089 error_setg(errp, "No TLS credentials with id '%s'", 4090 credid); 4091 goto fail; 4092 } 4093 vd->tlscreds = (QCryptoTLSCreds *) 4094 object_dynamic_cast(creds, 4095 TYPE_QCRYPTO_TLS_CREDS); 4096 if (!vd->tlscreds) { 4097 error_setg(errp, "Object with id '%s' is not TLS credentials", 4098 credid); 4099 goto fail; 4100 } 4101 object_ref(OBJECT(vd->tlscreds)); 4102 4103 if (!qcrypto_tls_creds_check_endpoint(vd->tlscreds, 4104 QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, 4105 errp)) { 4106 goto fail; 4107 } 4108 } 4109 tlsauthz = qemu_opt_get(opts, "tls-authz"); 4110 if (tlsauthz && !vd->tlscreds) { 4111 error_setg(errp, "'tls-authz' provided but TLS is not enabled"); 4112 goto fail; 4113 } 4114 4115 saslauthz = qemu_opt_get(opts, "sasl-authz"); 4116 if (saslauthz && !sasl) { 4117 error_setg(errp, "'sasl-authz' provided but SASL auth is not enabled"); 4118 goto fail; 4119 } 4120 4121 share = qemu_opt_get(opts, "share"); 4122 if (share) { 4123 if (strcmp(share, "ignore") == 0) { 4124 vd->share_policy = VNC_SHARE_POLICY_IGNORE; 4125 } else if (strcmp(share, "allow-exclusive") == 0) { 4126 vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; 4127 } else if (strcmp(share, "force-shared") == 0) { 4128 vd->share_policy = VNC_SHARE_POLICY_FORCE_SHARED; 4129 } else { 4130 error_setg(errp, "unknown vnc share= option"); 4131 goto fail; 4132 } 4133 } else { 4134 vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; 4135 } 4136 vd->connections_limit = qemu_opt_get_number(opts, "connections", 32); 4137 4138 #ifdef CONFIG_VNC_JPEG 4139 vd->lossy = qemu_opt_get_bool(opts, "lossy", false); 4140 #endif 4141 vd->non_adaptive = qemu_opt_get_bool(opts, "non-adaptive", false); 4142 /* adaptive updates are only used with tight encoding and 4143 * if lossy updates are enabled so we can disable all the 4144 * calculations otherwise */ 4145 if (!vd->lossy) { 4146 vd->non_adaptive = true; 4147 } 4148 4149 vd->power_control = qemu_opt_get_bool(opts, "power-control", false); 4150 4151 if (tlsauthz) { 4152 vd->tlsauthzid = g_strdup(tlsauthz); 4153 } 4154 #ifdef CONFIG_VNC_SASL 4155 if (sasl) { 4156 if (saslauthz) { 4157 vd->sasl.authzid = g_strdup(saslauthz); 4158 } 4159 } 4160 #endif 4161 4162 if (vnc_display_setup_auth(&vd->auth, &vd->subauth, 4163 vd->tlscreds, password, 4164 sasl, false, errp) < 0) { 4165 goto fail; 4166 } 4167 trace_vnc_auth_init(vd, 0, vd->auth, vd->subauth); 4168 4169 if (vnc_display_setup_auth(&vd->ws_auth, &vd->ws_subauth, 4170 vd->tlscreds, password, 4171 sasl, true, errp) < 0) { 4172 goto fail; 4173 } 4174 trace_vnc_auth_init(vd, 1, vd->ws_auth, vd->ws_subauth); 4175 4176 #ifdef CONFIG_VNC_SASL 4177 if (sasl && !vnc_sasl_server_init(errp)) { 4178 goto fail; 4179 } 4180 #endif 4181 vd->lock_key_sync = lock_key_sync; 4182 if (lock_key_sync) { 4183 vd->led = qemu_add_led_event_handler(kbd_leds, vd); 4184 } 4185 vd->ledstate = 0; 4186 4187 audiodev = qemu_opt_get(opts, "audiodev"); 4188 if (audiodev) { 4189 vd->audio_state = audio_state_by_name(audiodev); 4190 if (!vd->audio_state) { 4191 error_setg(errp, "Audiodev '%s' not found", audiodev); 4192 goto fail; 4193 } 4194 } 4195 4196 device_id = qemu_opt_get(opts, "display"); 4197 if (device_id) { 4198 int head = qemu_opt_get_number(opts, "head", 0); 4199 Error *err = NULL; 4200 4201 con = qemu_console_lookup_by_device_name(device_id, head, &err); 4202 if (err) { 4203 error_propagate(errp, err); 4204 goto fail; 4205 } 4206 } else { 4207 con = NULL; 4208 } 4209 4210 if (con != vd->dcl.con) { 4211 qkbd_state_free(vd->kbd); 4212 unregister_displaychangelistener(&vd->dcl); 4213 vd->dcl.con = con; 4214 register_displaychangelistener(&vd->dcl); 4215 vd->kbd = qkbd_state_init(vd->dcl.con); 4216 } 4217 qkbd_state_set_delay(vd->kbd, key_delay_ms); 4218 4219 if (saddr_list == NULL) { 4220 return; 4221 } 4222 4223 if (reverse) { 4224 if (vnc_display_connect(vd, saddr_list, wsaddr_list, errp) < 0) { 4225 goto fail; 4226 } 4227 } else { 4228 if (vnc_display_listen(vd, saddr_list, wsaddr_list, errp) < 0) { 4229 goto fail; 4230 } 4231 } 4232 4233 if (qemu_opt_get(opts, "to")) { 4234 vnc_display_print_local_addr(vd); 4235 } 4236 4237 /* Success */ 4238 return; 4239 4240 fail: 4241 vnc_display_close(vd); 4242 } 4243 4244 void vnc_display_add_client(const char *id, int csock, bool skipauth) 4245 { 4246 VncDisplay *vd = vnc_display_find(id); 4247 QIOChannelSocket *sioc; 4248 4249 if (!vd) { 4250 return; 4251 } 4252 4253 sioc = qio_channel_socket_new_fd(csock, NULL); 4254 if (sioc) { 4255 qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-server"); 4256 vnc_connect(vd, sioc, skipauth, false); 4257 object_unref(OBJECT(sioc)); 4258 } 4259 } 4260 4261 static void vnc_auto_assign_id(QemuOptsList *olist, QemuOpts *opts) 4262 { 4263 int i = 2; 4264 char *id; 4265 4266 id = g_strdup("default"); 4267 while (qemu_opts_find(olist, id)) { 4268 g_free(id); 4269 id = g_strdup_printf("vnc%d", i++); 4270 } 4271 qemu_opts_set_id(opts, id); 4272 } 4273 4274 void vnc_parse(const char *str) 4275 { 4276 QemuOptsList *olist = qemu_find_opts("vnc"); 4277 QemuOpts *opts = qemu_opts_parse_noisily(olist, str, !is_help_option(str)); 4278 const char *id; 4279 4280 if (!opts) { 4281 exit(1); 4282 } 4283 4284 id = qemu_opts_id(opts); 4285 if (!id) { 4286 /* auto-assign id if not present */ 4287 vnc_auto_assign_id(olist, opts); 4288 } 4289 } 4290 4291 int vnc_init_func(void *opaque, QemuOpts *opts, Error **errp) 4292 { 4293 Error *local_err = NULL; 4294 char *id = (char *)qemu_opts_id(opts); 4295 4296 assert(id); 4297 vnc_display_init(id, &local_err); 4298 if (local_err) { 4299 error_propagate(errp, local_err); 4300 return -1; 4301 } 4302 vnc_display_open(id, &local_err); 4303 if (local_err != NULL) { 4304 error_propagate(errp, local_err); 4305 return -1; 4306 } 4307 return 0; 4308 } 4309 4310 static void vnc_register_config(void) 4311 { 4312 qemu_add_opts(&qemu_vnc_opts); 4313 } 4314 opts_init(vnc_register_config); 4315