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->auth = g_strdup(vnc_auth_name(vd)); 248 if (err) { 249 qapi_free_VncServerInfo(info); 250 info = NULL; 251 error_free(err); 252 } 253 return info; 254 } 255 256 static void vnc_client_cache_auth(VncState *client) 257 { 258 if (!client->info) { 259 return; 260 } 261 262 if (client->tls) { 263 client->info->x509_dname = 264 qcrypto_tls_session_get_peer_name(client->tls); 265 } 266 #ifdef CONFIG_VNC_SASL 267 if (client->sasl.conn && 268 client->sasl.username) { 269 client->info->sasl_username = g_strdup(client->sasl.username); 270 } 271 #endif 272 } 273 274 static void vnc_client_cache_addr(VncState *client) 275 { 276 Error *err = NULL; 277 278 client->info = g_malloc0(sizeof(*client->info)); 279 vnc_init_basic_info_from_remote_addr(client->sioc, 280 qapi_VncClientInfo_base(client->info), 281 &err); 282 client->info->websocket = client->websocket; 283 if (err) { 284 qapi_free_VncClientInfo(client->info); 285 client->info = NULL; 286 error_free(err); 287 } 288 } 289 290 static void vnc_qmp_event(VncState *vs, QAPIEvent event) 291 { 292 VncServerInfo *si; 293 294 if (!vs->info) { 295 return; 296 } 297 298 si = vnc_server_info_get(vs->vd); 299 if (!si) { 300 return; 301 } 302 303 switch (event) { 304 case QAPI_EVENT_VNC_CONNECTED: 305 qapi_event_send_vnc_connected(si, qapi_VncClientInfo_base(vs->info)); 306 break; 307 case QAPI_EVENT_VNC_INITIALIZED: 308 qapi_event_send_vnc_initialized(si, vs->info); 309 break; 310 case QAPI_EVENT_VNC_DISCONNECTED: 311 qapi_event_send_vnc_disconnected(si, vs->info); 312 break; 313 default: 314 break; 315 } 316 317 qapi_free_VncServerInfo(si); 318 } 319 320 static VncClientInfo *qmp_query_vnc_client(const VncState *client) 321 { 322 VncClientInfo *info; 323 Error *err = NULL; 324 325 info = g_malloc0(sizeof(*info)); 326 327 vnc_init_basic_info_from_remote_addr(client->sioc, 328 qapi_VncClientInfo_base(info), 329 &err); 330 if (err) { 331 error_free(err); 332 qapi_free_VncClientInfo(info); 333 return NULL; 334 } 335 336 info->websocket = client->websocket; 337 338 if (client->tls) { 339 info->x509_dname = qcrypto_tls_session_get_peer_name(client->tls); 340 } 341 #ifdef CONFIG_VNC_SASL 342 if (client->sasl.conn && client->sasl.username) { 343 info->sasl_username = g_strdup(client->sasl.username); 344 } 345 #endif 346 347 return info; 348 } 349 350 static VncDisplay *vnc_display_find(const char *id) 351 { 352 VncDisplay *vd; 353 354 if (id == NULL) { 355 return QTAILQ_FIRST(&vnc_displays); 356 } 357 QTAILQ_FOREACH(vd, &vnc_displays, next) { 358 if (strcmp(id, vd->id) == 0) { 359 return vd; 360 } 361 } 362 return NULL; 363 } 364 365 static VncClientInfoList *qmp_query_client_list(VncDisplay *vd) 366 { 367 VncClientInfoList *prev = NULL; 368 VncState *client; 369 370 QTAILQ_FOREACH(client, &vd->clients, next) { 371 QAPI_LIST_PREPEND(prev, qmp_query_vnc_client(client)); 372 } 373 return prev; 374 } 375 376 VncInfo *qmp_query_vnc(Error **errp) 377 { 378 VncInfo *info = g_malloc0(sizeof(*info)); 379 VncDisplay *vd = vnc_display_find(NULL); 380 SocketAddress *addr = NULL; 381 382 if (vd == NULL || !vd->listener || !vd->listener->nsioc) { 383 info->enabled = false; 384 } else { 385 info->enabled = true; 386 387 /* for compatibility with the original command */ 388 info->has_clients = true; 389 info->clients = qmp_query_client_list(vd); 390 391 addr = qio_channel_socket_get_local_address(vd->listener->sioc[0], 392 errp); 393 if (!addr) { 394 goto out_error; 395 } 396 397 switch (addr->type) { 398 case SOCKET_ADDRESS_TYPE_INET: 399 info->host = g_strdup(addr->u.inet.host); 400 info->service = g_strdup(addr->u.inet.port); 401 if (addr->u.inet.ipv6) { 402 info->family = NETWORK_ADDRESS_FAMILY_IPV6; 403 } else { 404 info->family = NETWORK_ADDRESS_FAMILY_IPV4; 405 } 406 break; 407 408 case SOCKET_ADDRESS_TYPE_UNIX: 409 info->host = g_strdup(""); 410 info->service = g_strdup(addr->u.q_unix.path); 411 info->family = NETWORK_ADDRESS_FAMILY_UNIX; 412 break; 413 414 case SOCKET_ADDRESS_TYPE_VSOCK: 415 case SOCKET_ADDRESS_TYPE_FD: 416 error_setg(errp, "Unsupported socket address type %s", 417 SocketAddressType_str(addr->type)); 418 goto out_error; 419 default: 420 abort(); 421 } 422 423 info->has_family = true; 424 425 info->auth = g_strdup(vnc_auth_name(vd)); 426 } 427 428 qapi_free_SocketAddress(addr); 429 return info; 430 431 out_error: 432 qapi_free_SocketAddress(addr); 433 qapi_free_VncInfo(info); 434 return NULL; 435 } 436 437 438 static void qmp_query_auth(int auth, int subauth, 439 VncPrimaryAuth *qmp_auth, 440 VncVencryptSubAuth *qmp_vencrypt, 441 bool *qmp_has_vencrypt); 442 443 static VncServerInfo2List *qmp_query_server_entry(QIOChannelSocket *ioc, 444 bool websocket, 445 int auth, 446 int subauth, 447 VncServerInfo2List *prev) 448 { 449 VncServerInfo2 *info; 450 Error *err = NULL; 451 SocketAddress *addr; 452 453 addr = qio_channel_socket_get_local_address(ioc, NULL); 454 if (!addr) { 455 return prev; 456 } 457 458 info = g_new0(VncServerInfo2, 1); 459 vnc_init_basic_info(addr, qapi_VncServerInfo2_base(info), &err); 460 qapi_free_SocketAddress(addr); 461 if (err) { 462 qapi_free_VncServerInfo2(info); 463 error_free(err); 464 return prev; 465 } 466 info->websocket = websocket; 467 468 qmp_query_auth(auth, subauth, &info->auth, 469 &info->vencrypt, &info->has_vencrypt); 470 471 QAPI_LIST_PREPEND(prev, info); 472 return prev; 473 } 474 475 static void qmp_query_auth(int auth, int subauth, 476 VncPrimaryAuth *qmp_auth, 477 VncVencryptSubAuth *qmp_vencrypt, 478 bool *qmp_has_vencrypt) 479 { 480 switch (auth) { 481 case VNC_AUTH_VNC: 482 *qmp_auth = VNC_PRIMARY_AUTH_VNC; 483 break; 484 case VNC_AUTH_RA2: 485 *qmp_auth = VNC_PRIMARY_AUTH_RA2; 486 break; 487 case VNC_AUTH_RA2NE: 488 *qmp_auth = VNC_PRIMARY_AUTH_RA2NE; 489 break; 490 case VNC_AUTH_TIGHT: 491 *qmp_auth = VNC_PRIMARY_AUTH_TIGHT; 492 break; 493 case VNC_AUTH_ULTRA: 494 *qmp_auth = VNC_PRIMARY_AUTH_ULTRA; 495 break; 496 case VNC_AUTH_TLS: 497 *qmp_auth = VNC_PRIMARY_AUTH_TLS; 498 break; 499 case VNC_AUTH_VENCRYPT: 500 *qmp_auth = VNC_PRIMARY_AUTH_VENCRYPT; 501 *qmp_has_vencrypt = true; 502 switch (subauth) { 503 case VNC_AUTH_VENCRYPT_PLAIN: 504 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_PLAIN; 505 break; 506 case VNC_AUTH_VENCRYPT_TLSNONE: 507 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_NONE; 508 break; 509 case VNC_AUTH_VENCRYPT_TLSVNC: 510 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_VNC; 511 break; 512 case VNC_AUTH_VENCRYPT_TLSPLAIN: 513 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_PLAIN; 514 break; 515 case VNC_AUTH_VENCRYPT_X509NONE: 516 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_NONE; 517 break; 518 case VNC_AUTH_VENCRYPT_X509VNC: 519 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_VNC; 520 break; 521 case VNC_AUTH_VENCRYPT_X509PLAIN: 522 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_PLAIN; 523 break; 524 case VNC_AUTH_VENCRYPT_TLSSASL: 525 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_TLS_SASL; 526 break; 527 case VNC_AUTH_VENCRYPT_X509SASL: 528 *qmp_vencrypt = VNC_VENCRYPT_SUB_AUTH_X509_SASL; 529 break; 530 default: 531 *qmp_has_vencrypt = false; 532 break; 533 } 534 break; 535 case VNC_AUTH_SASL: 536 *qmp_auth = VNC_PRIMARY_AUTH_SASL; 537 break; 538 case VNC_AUTH_NONE: 539 default: 540 *qmp_auth = VNC_PRIMARY_AUTH_NONE; 541 break; 542 } 543 } 544 545 VncInfo2List *qmp_query_vnc_servers(Error **errp) 546 { 547 VncInfo2List *prev = NULL; 548 VncInfo2 *info; 549 VncDisplay *vd; 550 DeviceState *dev; 551 size_t i; 552 553 QTAILQ_FOREACH(vd, &vnc_displays, next) { 554 info = g_new0(VncInfo2, 1); 555 info->id = g_strdup(vd->id); 556 info->clients = qmp_query_client_list(vd); 557 qmp_query_auth(vd->auth, vd->subauth, &info->auth, 558 &info->vencrypt, &info->has_vencrypt); 559 if (vd->dcl.con) { 560 dev = DEVICE(object_property_get_link(OBJECT(vd->dcl.con), 561 "device", &error_abort)); 562 info->display = g_strdup(dev->id); 563 } 564 for (i = 0; vd->listener != NULL && i < vd->listener->nsioc; i++) { 565 info->server = qmp_query_server_entry( 566 vd->listener->sioc[i], false, vd->auth, vd->subauth, 567 info->server); 568 } 569 for (i = 0; vd->wslistener != NULL && i < vd->wslistener->nsioc; i++) { 570 info->server = qmp_query_server_entry( 571 vd->wslistener->sioc[i], true, vd->ws_auth, 572 vd->ws_subauth, info->server); 573 } 574 575 QAPI_LIST_PREPEND(prev, info); 576 } 577 return prev; 578 } 579 580 bool vnc_display_reload_certs(const char *id, Error **errp) 581 { 582 VncDisplay *vd = vnc_display_find(id); 583 QCryptoTLSCredsClass *creds = NULL; 584 585 if (!vd) { 586 error_setg(errp, "Can not find vnc display"); 587 return false; 588 } 589 590 if (!vd->tlscreds) { 591 error_setg(errp, "vnc tls is not enabled"); 592 return false; 593 } 594 595 creds = QCRYPTO_TLS_CREDS_GET_CLASS(OBJECT(vd->tlscreds)); 596 if (creds->reload == NULL) { 597 error_setg(errp, "%s doesn't support to reload TLS credential", 598 object_get_typename(OBJECT(vd->tlscreds))); 599 return false; 600 } 601 if (!creds->reload(vd->tlscreds, errp)) { 602 return false; 603 } 604 605 return true; 606 } 607 608 /* TODO 609 1) Get the queue working for IO. 610 2) there is some weirdness when using the -S option (the screen is grey 611 and not totally invalidated 612 3) resolutions > 1024 613 */ 614 615 static int vnc_update_client(VncState *vs, int has_dirty); 616 static void vnc_disconnect_start(VncState *vs); 617 618 static void vnc_colordepth(VncState *vs); 619 static void framebuffer_update_request(VncState *vs, int incremental, 620 int x_position, int y_position, 621 int w, int h); 622 static void vnc_refresh(DisplayChangeListener *dcl); 623 static int vnc_refresh_server_surface(VncDisplay *vd); 624 625 static int vnc_width(VncDisplay *vd) 626 { 627 return MIN(VNC_MAX_WIDTH, ROUND_UP(surface_width(vd->ds), 628 VNC_DIRTY_PIXELS_PER_BIT)); 629 } 630 631 static int vnc_true_width(VncDisplay *vd) 632 { 633 return MIN(VNC_MAX_WIDTH, surface_width(vd->ds)); 634 } 635 636 static int vnc_height(VncDisplay *vd) 637 { 638 return MIN(VNC_MAX_HEIGHT, surface_height(vd->ds)); 639 } 640 641 static void vnc_set_area_dirty(DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], 642 VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT), 643 VncDisplay *vd, 644 int x, int y, int w, int h) 645 { 646 int width = vnc_width(vd); 647 int height = vnc_height(vd); 648 649 /* this is needed this to ensure we updated all affected 650 * blocks if x % VNC_DIRTY_PIXELS_PER_BIT != 0 */ 651 w += (x % VNC_DIRTY_PIXELS_PER_BIT); 652 x -= (x % VNC_DIRTY_PIXELS_PER_BIT); 653 654 x = MIN(x, width); 655 y = MIN(y, height); 656 w = MIN(x + w, width) - x; 657 h = MIN(y + h, height); 658 659 for (; y < h; y++) { 660 bitmap_set(dirty[y], x / VNC_DIRTY_PIXELS_PER_BIT, 661 DIV_ROUND_UP(w, VNC_DIRTY_PIXELS_PER_BIT)); 662 } 663 } 664 665 static void vnc_dpy_update(DisplayChangeListener *dcl, 666 int x, int y, int w, int h) 667 { 668 VncDisplay *vd = container_of(dcl, VncDisplay, dcl); 669 struct VncSurface *s = &vd->guest; 670 671 vnc_set_area_dirty(s->dirty, vd, x, y, w, h); 672 } 673 674 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, 675 int32_t encoding) 676 { 677 vnc_write_u16(vs, x); 678 vnc_write_u16(vs, y); 679 vnc_write_u16(vs, w); 680 vnc_write_u16(vs, h); 681 682 vnc_write_s32(vs, encoding); 683 } 684 685 static void vnc_desktop_resize_ext(VncState *vs, int reject_reason) 686 { 687 trace_vnc_msg_server_ext_desktop_resize( 688 vs, vs->ioc, vs->client_width, vs->client_height, reject_reason); 689 690 vnc_lock_output(vs); 691 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 692 vnc_write_u8(vs, 0); 693 vnc_write_u16(vs, 1); /* number of rects */ 694 vnc_framebuffer_update(vs, 695 reject_reason ? 1 : 0, 696 reject_reason, 697 vs->client_width, vs->client_height, 698 VNC_ENCODING_DESKTOP_RESIZE_EXT); 699 vnc_write_u8(vs, 1); /* number of screens */ 700 vnc_write_u8(vs, 0); /* padding */ 701 vnc_write_u8(vs, 0); /* padding */ 702 vnc_write_u8(vs, 0); /* padding */ 703 vnc_write_u32(vs, 0); /* screen id */ 704 vnc_write_u16(vs, 0); /* screen x-pos */ 705 vnc_write_u16(vs, 0); /* screen y-pos */ 706 vnc_write_u16(vs, vs->client_width); 707 vnc_write_u16(vs, vs->client_height); 708 vnc_write_u32(vs, 0); /* screen flags */ 709 vnc_unlock_output(vs); 710 vnc_flush(vs); 711 } 712 713 static void vnc_desktop_resize(VncState *vs) 714 { 715 if (vs->ioc == NULL || (!vnc_has_feature(vs, VNC_FEATURE_RESIZE) && 716 !vnc_has_feature(vs, VNC_FEATURE_RESIZE_EXT))) { 717 return; 718 } 719 if (vs->client_width == vs->vd->true_width && 720 vs->client_height == pixman_image_get_height(vs->vd->server)) { 721 return; 722 } 723 724 assert(vs->vd->true_width < 65536 && 725 vs->vd->true_width >= 0); 726 assert(pixman_image_get_height(vs->vd->server) < 65536 && 727 pixman_image_get_height(vs->vd->server) >= 0); 728 vs->client_width = vs->vd->true_width; 729 vs->client_height = pixman_image_get_height(vs->vd->server); 730 731 if (vnc_has_feature(vs, VNC_FEATURE_RESIZE_EXT)) { 732 vnc_desktop_resize_ext(vs, 0); 733 return; 734 } 735 736 trace_vnc_msg_server_desktop_resize( 737 vs, vs->ioc, vs->client_width, vs->client_height); 738 739 vnc_lock_output(vs); 740 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 741 vnc_write_u8(vs, 0); 742 vnc_write_u16(vs, 1); /* number of rects */ 743 vnc_framebuffer_update(vs, 0, 0, vs->client_width, vs->client_height, 744 VNC_ENCODING_DESKTOPRESIZE); 745 vnc_unlock_output(vs); 746 vnc_flush(vs); 747 } 748 749 static void vnc_abort_display_jobs(VncDisplay *vd) 750 { 751 VncState *vs; 752 753 QTAILQ_FOREACH(vs, &vd->clients, next) { 754 vnc_lock_output(vs); 755 vs->abort = true; 756 vnc_unlock_output(vs); 757 } 758 QTAILQ_FOREACH(vs, &vd->clients, next) { 759 vnc_jobs_join(vs); 760 } 761 QTAILQ_FOREACH(vs, &vd->clients, next) { 762 vnc_lock_output(vs); 763 if (vs->update == VNC_STATE_UPDATE_NONE && 764 vs->job_update != VNC_STATE_UPDATE_NONE) { 765 /* job aborted before completion */ 766 vs->update = vs->job_update; 767 vs->job_update = VNC_STATE_UPDATE_NONE; 768 } 769 vs->abort = false; 770 vnc_unlock_output(vs); 771 } 772 } 773 774 int vnc_server_fb_stride(VncDisplay *vd) 775 { 776 return pixman_image_get_stride(vd->server); 777 } 778 779 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y) 780 { 781 uint8_t *ptr; 782 783 ptr = (uint8_t *)pixman_image_get_data(vd->server); 784 ptr += y * vnc_server_fb_stride(vd); 785 ptr += x * VNC_SERVER_FB_BYTES; 786 return ptr; 787 } 788 789 static void vnc_update_server_surface(VncDisplay *vd) 790 { 791 int width, height; 792 793 qemu_pixman_image_unref(vd->server); 794 vd->server = NULL; 795 796 if (QTAILQ_EMPTY(&vd->clients)) { 797 return; 798 } 799 800 width = vnc_width(vd); 801 height = vnc_height(vd); 802 vd->true_width = vnc_true_width(vd); 803 vd->server = pixman_image_create_bits(VNC_SERVER_FB_FORMAT, 804 width, height, 805 NULL, 0); 806 807 memset(vd->guest.dirty, 0x00, sizeof(vd->guest.dirty)); 808 vnc_set_area_dirty(vd->guest.dirty, vd, 0, 0, 809 width, height); 810 } 811 812 static bool vnc_check_pageflip(DisplaySurface *s1, 813 DisplaySurface *s2) 814 { 815 return (s1 != NULL && 816 s2 != NULL && 817 surface_width(s1) == surface_width(s2) && 818 surface_height(s1) == surface_height(s2) && 819 surface_format(s1) == surface_format(s2)); 820 821 } 822 823 static void vnc_dpy_switch(DisplayChangeListener *dcl, 824 DisplaySurface *surface) 825 { 826 VncDisplay *vd = container_of(dcl, VncDisplay, dcl); 827 bool pageflip = vnc_check_pageflip(vd->ds, surface); 828 VncState *vs; 829 830 vnc_abort_display_jobs(vd); 831 vd->ds = surface; 832 833 /* guest surface */ 834 qemu_pixman_image_unref(vd->guest.fb); 835 vd->guest.fb = pixman_image_ref(surface->image); 836 vd->guest.format = surface_format(surface); 837 838 839 if (pageflip) { 840 trace_vnc_server_dpy_pageflip(vd, 841 surface_width(surface), 842 surface_height(surface), 843 surface_format(surface)); 844 vnc_set_area_dirty(vd->guest.dirty, vd, 0, 0, 845 surface_width(surface), 846 surface_height(surface)); 847 return; 848 } 849 850 trace_vnc_server_dpy_recreate(vd, 851 surface_width(surface), 852 surface_height(surface), 853 surface_format(surface)); 854 /* server surface */ 855 vnc_update_server_surface(vd); 856 857 QTAILQ_FOREACH(vs, &vd->clients, next) { 858 vnc_colordepth(vs); 859 vnc_desktop_resize(vs); 860 vnc_cursor_define(vs); 861 memset(vs->dirty, 0x00, sizeof(vs->dirty)); 862 vnc_set_area_dirty(vs->dirty, vd, 0, 0, 863 vnc_width(vd), 864 vnc_height(vd)); 865 vnc_update_throttle_offset(vs); 866 } 867 } 868 869 /* fastest code */ 870 static void vnc_write_pixels_copy(VncState *vs, 871 void *pixels, int size) 872 { 873 vnc_write(vs, pixels, size); 874 } 875 876 /* slowest but generic code. */ 877 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v) 878 { 879 uint8_t r, g, b; 880 881 #if VNC_SERVER_FB_FORMAT == PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8) 882 r = (((v & 0x00ff0000) >> 16) << vs->client_pf.rbits) >> 8; 883 g = (((v & 0x0000ff00) >> 8) << vs->client_pf.gbits) >> 8; 884 b = (((v & 0x000000ff) >> 0) << vs->client_pf.bbits) >> 8; 885 #else 886 # error need some bits here if you change VNC_SERVER_FB_FORMAT 887 #endif 888 v = (r << vs->client_pf.rshift) | 889 (g << vs->client_pf.gshift) | 890 (b << vs->client_pf.bshift); 891 switch (vs->client_pf.bytes_per_pixel) { 892 case 1: 893 buf[0] = v; 894 break; 895 case 2: 896 if (vs->client_be) { 897 buf[0] = v >> 8; 898 buf[1] = v; 899 } else { 900 buf[1] = v >> 8; 901 buf[0] = v; 902 } 903 break; 904 default: 905 case 4: 906 if (vs->client_be) { 907 buf[0] = v >> 24; 908 buf[1] = v >> 16; 909 buf[2] = v >> 8; 910 buf[3] = v; 911 } else { 912 buf[3] = v >> 24; 913 buf[2] = v >> 16; 914 buf[1] = v >> 8; 915 buf[0] = v; 916 } 917 break; 918 } 919 } 920 921 static void vnc_write_pixels_generic(VncState *vs, 922 void *pixels1, int size) 923 { 924 uint8_t buf[4]; 925 926 if (VNC_SERVER_FB_BYTES == 4) { 927 uint32_t *pixels = pixels1; 928 int n, i; 929 n = size >> 2; 930 for (i = 0; i < n; i++) { 931 vnc_convert_pixel(vs, buf, pixels[i]); 932 vnc_write(vs, buf, vs->client_pf.bytes_per_pixel); 933 } 934 } 935 } 936 937 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h) 938 { 939 int i; 940 uint8_t *row; 941 VncDisplay *vd = vs->vd; 942 943 row = vnc_server_fb_ptr(vd, x, y); 944 for (i = 0; i < h; i++) { 945 vs->write_pixels(vs, row, w * VNC_SERVER_FB_BYTES); 946 row += vnc_server_fb_stride(vd); 947 } 948 return 1; 949 } 950 951 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h) 952 { 953 int n = 0; 954 955 switch(vs->vnc_encoding) { 956 case VNC_ENCODING_ZLIB: 957 n = vnc_zlib_send_framebuffer_update(vs, x, y, w, h); 958 break; 959 case VNC_ENCODING_HEXTILE: 960 vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_HEXTILE); 961 n = vnc_hextile_send_framebuffer_update(vs, x, y, w, h); 962 break; 963 case VNC_ENCODING_TIGHT: 964 n = vnc_tight_send_framebuffer_update(vs, x, y, w, h); 965 break; 966 case VNC_ENCODING_TIGHT_PNG: 967 n = vnc_tight_png_send_framebuffer_update(vs, x, y, w, h); 968 break; 969 case VNC_ENCODING_ZRLE: 970 n = vnc_zrle_send_framebuffer_update(vs, x, y, w, h); 971 break; 972 case VNC_ENCODING_ZYWRLE: 973 n = vnc_zywrle_send_framebuffer_update(vs, x, y, w, h); 974 break; 975 default: 976 vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_RAW); 977 n = vnc_raw_send_framebuffer_update(vs, x, y, w, h); 978 break; 979 } 980 return n; 981 } 982 983 static void vnc_mouse_set(DisplayChangeListener *dcl, 984 int x, int y, int visible) 985 { 986 /* can we ask the client(s) to move the pointer ??? */ 987 } 988 989 static int vnc_cursor_define(VncState *vs) 990 { 991 QEMUCursor *c = qemu_console_get_cursor(vs->vd->dcl.con); 992 int isize; 993 994 if (!c) { 995 return -1; 996 } 997 998 if (vnc_has_feature(vs, VNC_FEATURE_ALPHA_CURSOR)) { 999 vnc_lock_output(vs); 1000 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 1001 vnc_write_u8(vs, 0); /* padding */ 1002 vnc_write_u16(vs, 1); /* # of rects */ 1003 vnc_framebuffer_update(vs, c->hot_x, c->hot_y, c->width, c->height, 1004 VNC_ENCODING_ALPHA_CURSOR); 1005 vnc_write_s32(vs, VNC_ENCODING_RAW); 1006 vnc_write(vs, c->data, c->width * c->height * 4); 1007 vnc_unlock_output(vs); 1008 return 0; 1009 } 1010 if (vnc_has_feature(vs, VNC_FEATURE_RICH_CURSOR)) { 1011 vnc_lock_output(vs); 1012 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 1013 vnc_write_u8(vs, 0); /* padding */ 1014 vnc_write_u16(vs, 1); /* # of rects */ 1015 vnc_framebuffer_update(vs, c->hot_x, c->hot_y, c->width, c->height, 1016 VNC_ENCODING_RICH_CURSOR); 1017 isize = c->width * c->height * vs->client_pf.bytes_per_pixel; 1018 vnc_write_pixels_generic(vs, c->data, isize); 1019 vnc_write(vs, vs->vd->cursor_mask, vs->vd->cursor_msize); 1020 vnc_unlock_output(vs); 1021 return 0; 1022 } 1023 return -1; 1024 } 1025 1026 static void vnc_dpy_cursor_define(DisplayChangeListener *dcl, 1027 QEMUCursor *c) 1028 { 1029 VncDisplay *vd = container_of(dcl, VncDisplay, dcl); 1030 VncState *vs; 1031 1032 g_free(vd->cursor_mask); 1033 vd->cursor_msize = cursor_get_mono_bpl(c) * c->height; 1034 vd->cursor_mask = g_malloc0(vd->cursor_msize); 1035 cursor_get_mono_mask(c, 0, vd->cursor_mask); 1036 1037 QTAILQ_FOREACH(vs, &vd->clients, next) { 1038 vnc_cursor_define(vs); 1039 } 1040 } 1041 1042 static int find_and_clear_dirty_height(VncState *vs, 1043 int y, int last_x, int x, int height) 1044 { 1045 int h; 1046 1047 for (h = 1; h < (height - y); h++) { 1048 if (!test_bit(last_x, vs->dirty[y + h])) { 1049 break; 1050 } 1051 bitmap_clear(vs->dirty[y + h], last_x, x - last_x); 1052 } 1053 1054 return h; 1055 } 1056 1057 /* 1058 * Figure out how much pending data we should allow in the output 1059 * buffer before we throttle incremental display updates, and/or 1060 * drop audio samples. 1061 * 1062 * We allow for equiv of 1 full display's worth of FB updates, 1063 * and 1 second of audio samples. If audio backlog was larger 1064 * than that the client would already suffering awful audio 1065 * glitches, so dropping samples is no worse really). 1066 */ 1067 static void vnc_update_throttle_offset(VncState *vs) 1068 { 1069 size_t offset = 1070 vs->client_width * vs->client_height * vs->client_pf.bytes_per_pixel; 1071 1072 if (vs->audio_cap) { 1073 int bps; 1074 switch (vs->as.fmt) { 1075 default: 1076 case AUDIO_FORMAT_U8: 1077 case AUDIO_FORMAT_S8: 1078 bps = 1; 1079 break; 1080 case AUDIO_FORMAT_U16: 1081 case AUDIO_FORMAT_S16: 1082 bps = 2; 1083 break; 1084 case AUDIO_FORMAT_U32: 1085 case AUDIO_FORMAT_S32: 1086 bps = 4; 1087 break; 1088 } 1089 offset += vs->as.freq * bps * vs->as.nchannels; 1090 } 1091 1092 /* Put a floor of 1MB on offset, so that if we have a large pending 1093 * buffer and the display is resized to a small size & back again 1094 * we don't suddenly apply a tiny send limit 1095 */ 1096 offset = MAX(offset, 1024 * 1024); 1097 1098 if (vs->throttle_output_offset != offset) { 1099 trace_vnc_client_throttle_threshold( 1100 vs, vs->ioc, vs->throttle_output_offset, offset, vs->client_width, 1101 vs->client_height, vs->client_pf.bytes_per_pixel, vs->audio_cap); 1102 } 1103 1104 vs->throttle_output_offset = offset; 1105 } 1106 1107 static bool vnc_should_update(VncState *vs) 1108 { 1109 switch (vs->update) { 1110 case VNC_STATE_UPDATE_NONE: 1111 break; 1112 case VNC_STATE_UPDATE_INCREMENTAL: 1113 /* Only allow incremental updates if the pending send queue 1114 * is less than the permitted threshold, and the job worker 1115 * is completely idle. 1116 */ 1117 if (vs->output.offset < vs->throttle_output_offset && 1118 vs->job_update == VNC_STATE_UPDATE_NONE) { 1119 return true; 1120 } 1121 trace_vnc_client_throttle_incremental( 1122 vs, vs->ioc, vs->job_update, vs->output.offset); 1123 break; 1124 case VNC_STATE_UPDATE_FORCE: 1125 /* Only allow forced updates if the pending send queue 1126 * does not contain a previous forced update, and the 1127 * job worker is completely idle. 1128 * 1129 * Note this means we'll queue a forced update, even if 1130 * the output buffer size is otherwise over the throttle 1131 * output limit. 1132 */ 1133 if (vs->force_update_offset == 0 && 1134 vs->job_update == VNC_STATE_UPDATE_NONE) { 1135 return true; 1136 } 1137 trace_vnc_client_throttle_forced( 1138 vs, vs->ioc, vs->job_update, vs->force_update_offset); 1139 break; 1140 } 1141 return false; 1142 } 1143 1144 static int vnc_update_client(VncState *vs, int has_dirty) 1145 { 1146 VncDisplay *vd = vs->vd; 1147 VncJob *job; 1148 int y; 1149 int height, width; 1150 int n = 0; 1151 1152 if (vs->disconnecting) { 1153 vnc_disconnect_finish(vs); 1154 return 0; 1155 } 1156 1157 vs->has_dirty += has_dirty; 1158 if (!vnc_should_update(vs)) { 1159 return 0; 1160 } 1161 1162 if (!vs->has_dirty && vs->update != VNC_STATE_UPDATE_FORCE) { 1163 return 0; 1164 } 1165 1166 /* 1167 * Send screen updates to the vnc client using the server 1168 * surface and server dirty map. guest surface updates 1169 * happening in parallel don't disturb us, the next pass will 1170 * send them to the client. 1171 */ 1172 job = vnc_job_new(vs); 1173 1174 height = pixman_image_get_height(vd->server); 1175 width = pixman_image_get_width(vd->server); 1176 1177 y = 0; 1178 for (;;) { 1179 int x, h; 1180 unsigned long x2; 1181 unsigned long offset = find_next_bit((unsigned long *) &vs->dirty, 1182 height * VNC_DIRTY_BPL(vs), 1183 y * VNC_DIRTY_BPL(vs)); 1184 if (offset == height * VNC_DIRTY_BPL(vs)) { 1185 /* no more dirty bits */ 1186 break; 1187 } 1188 y = offset / VNC_DIRTY_BPL(vs); 1189 x = offset % VNC_DIRTY_BPL(vs); 1190 x2 = find_next_zero_bit((unsigned long *) &vs->dirty[y], 1191 VNC_DIRTY_BPL(vs), x); 1192 bitmap_clear(vs->dirty[y], x, x2 - x); 1193 h = find_and_clear_dirty_height(vs, y, x, x2, height); 1194 x2 = MIN(x2, width / VNC_DIRTY_PIXELS_PER_BIT); 1195 if (x2 > x) { 1196 n += vnc_job_add_rect(job, x * VNC_DIRTY_PIXELS_PER_BIT, y, 1197 (x2 - x) * VNC_DIRTY_PIXELS_PER_BIT, h); 1198 } 1199 if (!x && x2 == width / VNC_DIRTY_PIXELS_PER_BIT) { 1200 y += h; 1201 if (y == height) { 1202 break; 1203 } 1204 } 1205 } 1206 1207 vs->job_update = vs->update; 1208 vs->update = VNC_STATE_UPDATE_NONE; 1209 vnc_job_push(job); 1210 vs->has_dirty = 0; 1211 return n; 1212 } 1213 1214 /* audio */ 1215 static void audio_capture_notify(void *opaque, audcnotification_e cmd) 1216 { 1217 VncState *vs = opaque; 1218 1219 assert(vs->magic == VNC_MAGIC); 1220 switch (cmd) { 1221 case AUD_CNOTIFY_DISABLE: 1222 trace_vnc_msg_server_audio_end(vs, vs->ioc); 1223 vnc_lock_output(vs); 1224 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); 1225 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); 1226 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_END); 1227 vnc_unlock_output(vs); 1228 vnc_flush(vs); 1229 break; 1230 1231 case AUD_CNOTIFY_ENABLE: 1232 trace_vnc_msg_server_audio_begin(vs, vs->ioc); 1233 vnc_lock_output(vs); 1234 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); 1235 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); 1236 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_BEGIN); 1237 vnc_unlock_output(vs); 1238 vnc_flush(vs); 1239 break; 1240 } 1241 } 1242 1243 static void audio_capture_destroy(void *opaque) 1244 { 1245 } 1246 1247 static void audio_capture(void *opaque, const void *buf, int size) 1248 { 1249 VncState *vs = opaque; 1250 1251 assert(vs->magic == VNC_MAGIC); 1252 trace_vnc_msg_server_audio_data(vs, vs->ioc, buf, size); 1253 vnc_lock_output(vs); 1254 if (vs->output.offset < vs->throttle_output_offset) { 1255 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); 1256 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); 1257 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_DATA); 1258 vnc_write_u32(vs, size); 1259 vnc_write(vs, buf, size); 1260 } else { 1261 trace_vnc_client_throttle_audio(vs, vs->ioc, vs->output.offset); 1262 } 1263 vnc_unlock_output(vs); 1264 vnc_flush(vs); 1265 } 1266 1267 static void audio_add(VncState *vs) 1268 { 1269 struct audio_capture_ops ops; 1270 1271 if (vs->audio_cap) { 1272 error_report("audio already running"); 1273 return; 1274 } 1275 1276 ops.notify = audio_capture_notify; 1277 ops.destroy = audio_capture_destroy; 1278 ops.capture = audio_capture; 1279 1280 vs->audio_cap = AUD_add_capture(vs->vd->audio_state, &vs->as, &ops, vs); 1281 if (!vs->audio_cap) { 1282 error_report("Failed to add audio capture"); 1283 } 1284 } 1285 1286 static void audio_del(VncState *vs) 1287 { 1288 if (vs->audio_cap) { 1289 AUD_del_capture(vs->audio_cap, vs); 1290 vs->audio_cap = NULL; 1291 } 1292 } 1293 1294 static void vnc_disconnect_start(VncState *vs) 1295 { 1296 if (vs->disconnecting) { 1297 return; 1298 } 1299 trace_vnc_client_disconnect_start(vs, vs->ioc); 1300 vnc_set_share_mode(vs, VNC_SHARE_MODE_DISCONNECTED); 1301 if (vs->ioc_tag) { 1302 g_source_remove(vs->ioc_tag); 1303 vs->ioc_tag = 0; 1304 } 1305 qio_channel_close(vs->ioc, NULL); 1306 vs->disconnecting = TRUE; 1307 } 1308 1309 void vnc_disconnect_finish(VncState *vs) 1310 { 1311 int i; 1312 1313 trace_vnc_client_disconnect_finish(vs, vs->ioc); 1314 1315 vnc_jobs_join(vs); /* Wait encoding jobs */ 1316 1317 vnc_lock_output(vs); 1318 vnc_qmp_event(vs, QAPI_EVENT_VNC_DISCONNECTED); 1319 1320 buffer_free(&vs->input); 1321 buffer_free(&vs->output); 1322 1323 qapi_free_VncClientInfo(vs->info); 1324 1325 vnc_zlib_clear(vs); 1326 vnc_tight_clear(vs); 1327 vnc_zrle_clear(vs); 1328 1329 #ifdef CONFIG_VNC_SASL 1330 vnc_sasl_client_cleanup(vs); 1331 #endif /* CONFIG_VNC_SASL */ 1332 audio_del(vs); 1333 qkbd_state_lift_all_keys(vs->vd->kbd); 1334 1335 if (vs->mouse_mode_notifier.notify != NULL) { 1336 qemu_remove_mouse_mode_change_notifier(&vs->mouse_mode_notifier); 1337 } 1338 QTAILQ_REMOVE(&vs->vd->clients, vs, next); 1339 if (QTAILQ_EMPTY(&vs->vd->clients)) { 1340 /* last client gone */ 1341 vnc_update_server_surface(vs->vd); 1342 } 1343 vnc_unlock_output(vs); 1344 1345 if (vs->cbpeer.notifier.notify) { 1346 qemu_clipboard_peer_unregister(&vs->cbpeer); 1347 } 1348 1349 qemu_mutex_destroy(&vs->output_mutex); 1350 if (vs->bh != NULL) { 1351 qemu_bh_delete(vs->bh); 1352 } 1353 buffer_free(&vs->jobs_buffer); 1354 1355 for (i = 0; i < VNC_STAT_ROWS; ++i) { 1356 g_free(vs->lossy_rect[i]); 1357 } 1358 g_free(vs->lossy_rect); 1359 1360 object_unref(OBJECT(vs->ioc)); 1361 vs->ioc = NULL; 1362 object_unref(OBJECT(vs->sioc)); 1363 vs->sioc = NULL; 1364 vs->magic = 0; 1365 g_free(vs->zrle); 1366 g_free(vs->tight); 1367 g_free(vs); 1368 } 1369 1370 size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error *err) 1371 { 1372 if (ret <= 0) { 1373 if (ret == 0) { 1374 trace_vnc_client_eof(vs, vs->ioc); 1375 vnc_disconnect_start(vs); 1376 } else if (ret != QIO_CHANNEL_ERR_BLOCK) { 1377 trace_vnc_client_io_error(vs, vs->ioc, 1378 err ? error_get_pretty(err) : "Unknown"); 1379 vnc_disconnect_start(vs); 1380 } 1381 1382 error_free(err); 1383 return 0; 1384 } 1385 return ret; 1386 } 1387 1388 1389 void vnc_client_error(VncState *vs) 1390 { 1391 VNC_DEBUG("Closing down client sock: protocol error\n"); 1392 vnc_disconnect_start(vs); 1393 } 1394 1395 1396 /* 1397 * Called to write a chunk of data to the client socket. The data may 1398 * be the raw data, or may have already been encoded by SASL. 1399 * The data will be written either straight onto the socket, or 1400 * written via the GNUTLS wrappers, if TLS/SSL encryption is enabled 1401 * 1402 * NB, it is theoretically possible to have 2 layers of encryption, 1403 * both SASL, and this TLS layer. It is highly unlikely in practice 1404 * though, since SASL encryption will typically be a no-op if TLS 1405 * is active 1406 * 1407 * Returns the number of bytes written, which may be less than 1408 * the requested 'datalen' if the socket would block. Returns 1409 * 0 on I/O error, and disconnects the client socket. 1410 */ 1411 size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen) 1412 { 1413 Error *err = NULL; 1414 ssize_t ret; 1415 ret = qio_channel_write(vs->ioc, (const char *)data, datalen, &err); 1416 VNC_DEBUG("Wrote wire %p %zd -> %ld\n", data, datalen, ret); 1417 return vnc_client_io_error(vs, ret, err); 1418 } 1419 1420 1421 /* 1422 * Called to write buffered data to the client socket, when not 1423 * using any SASL SSF encryption layers. Will write as much data 1424 * as possible without blocking. If all buffered data is written, 1425 * will switch the FD poll() handler back to read monitoring. 1426 * 1427 * Returns the number of bytes written, which may be less than 1428 * the buffered output data if the socket would block. Returns 1429 * 0 on I/O error, and disconnects the client socket. 1430 */ 1431 static size_t vnc_client_write_plain(VncState *vs) 1432 { 1433 size_t offset; 1434 size_t ret; 1435 1436 #ifdef CONFIG_VNC_SASL 1437 VNC_DEBUG("Write Plain: Pending output %p size %zd offset %zd. Wait SSF %d\n", 1438 vs->output.buffer, vs->output.capacity, vs->output.offset, 1439 vs->sasl.waitWriteSSF); 1440 1441 if (vs->sasl.conn && 1442 vs->sasl.runSSF && 1443 vs->sasl.waitWriteSSF) { 1444 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->sasl.waitWriteSSF); 1445 if (ret) 1446 vs->sasl.waitWriteSSF -= ret; 1447 } else 1448 #endif /* CONFIG_VNC_SASL */ 1449 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->output.offset); 1450 if (!ret) 1451 return 0; 1452 1453 if (ret >= vs->force_update_offset) { 1454 if (vs->force_update_offset != 0) { 1455 trace_vnc_client_unthrottle_forced(vs, vs->ioc); 1456 } 1457 vs->force_update_offset = 0; 1458 } else { 1459 vs->force_update_offset -= ret; 1460 } 1461 offset = vs->output.offset; 1462 buffer_advance(&vs->output, ret); 1463 if (offset >= vs->throttle_output_offset && 1464 vs->output.offset < vs->throttle_output_offset) { 1465 trace_vnc_client_unthrottle_incremental(vs, vs->ioc, vs->output.offset); 1466 } 1467 1468 if (vs->output.offset == 0) { 1469 if (vs->ioc_tag) { 1470 g_source_remove(vs->ioc_tag); 1471 } 1472 vs->ioc_tag = qio_channel_add_watch( 1473 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 1474 vnc_client_io, vs, NULL); 1475 } 1476 1477 return ret; 1478 } 1479 1480 1481 /* 1482 * First function called whenever there is data to be written to 1483 * the client socket. Will delegate actual work according to whether 1484 * SASL SSF layers are enabled (thus requiring encryption calls) 1485 */ 1486 static void vnc_client_write_locked(VncState *vs) 1487 { 1488 #ifdef CONFIG_VNC_SASL 1489 if (vs->sasl.conn && 1490 vs->sasl.runSSF && 1491 !vs->sasl.waitWriteSSF) { 1492 vnc_client_write_sasl(vs); 1493 } else 1494 #endif /* CONFIG_VNC_SASL */ 1495 { 1496 vnc_client_write_plain(vs); 1497 } 1498 } 1499 1500 static void vnc_client_write(VncState *vs) 1501 { 1502 assert(vs->magic == VNC_MAGIC); 1503 vnc_lock_output(vs); 1504 if (vs->output.offset) { 1505 vnc_client_write_locked(vs); 1506 } else if (vs->ioc != NULL) { 1507 if (vs->ioc_tag) { 1508 g_source_remove(vs->ioc_tag); 1509 } 1510 vs->ioc_tag = qio_channel_add_watch( 1511 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 1512 vnc_client_io, vs, NULL); 1513 } 1514 vnc_unlock_output(vs); 1515 } 1516 1517 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting) 1518 { 1519 vs->read_handler = func; 1520 vs->read_handler_expect = expecting; 1521 } 1522 1523 1524 /* 1525 * Called to read a chunk of data from the client socket. The data may 1526 * be the raw data, or may need to be further decoded by SASL. 1527 * The data will be read either straight from to the socket, or 1528 * read via the GNUTLS wrappers, if TLS/SSL encryption is enabled 1529 * 1530 * NB, it is theoretically possible to have 2 layers of encryption, 1531 * both SASL, and this TLS layer. It is highly unlikely in practice 1532 * though, since SASL encryption will typically be a no-op if TLS 1533 * is active 1534 * 1535 * Returns the number of bytes read, which may be less than 1536 * the requested 'datalen' if the socket would block. Returns 1537 * 0 on I/O error or EOF, and disconnects the client socket. 1538 */ 1539 size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen) 1540 { 1541 ssize_t ret; 1542 Error *err = NULL; 1543 ret = qio_channel_read(vs->ioc, (char *)data, datalen, &err); 1544 VNC_DEBUG("Read wire %p %zd -> %ld\n", data, datalen, ret); 1545 return vnc_client_io_error(vs, ret, err); 1546 } 1547 1548 1549 /* 1550 * Called to read data from the client socket to the input buffer, 1551 * when not using any SASL SSF encryption layers. Will read as much 1552 * data as possible without blocking. 1553 * 1554 * Returns the number of bytes read, which may be less than 1555 * the requested 'datalen' if the socket would block. Returns 1556 * 0 on I/O error or EOF, and disconnects the client socket. 1557 */ 1558 static size_t vnc_client_read_plain(VncState *vs) 1559 { 1560 size_t ret; 1561 VNC_DEBUG("Read plain %p size %zd offset %zd\n", 1562 vs->input.buffer, vs->input.capacity, vs->input.offset); 1563 buffer_reserve(&vs->input, 4096); 1564 ret = vnc_client_read_buf(vs, buffer_end(&vs->input), 4096); 1565 if (!ret) 1566 return 0; 1567 vs->input.offset += ret; 1568 return ret; 1569 } 1570 1571 static void vnc_jobs_bh(void *opaque) 1572 { 1573 VncState *vs = opaque; 1574 1575 assert(vs->magic == VNC_MAGIC); 1576 vnc_jobs_consume_buffer(vs); 1577 } 1578 1579 /* 1580 * First function called whenever there is more data to be read from 1581 * the client socket. Will delegate actual work according to whether 1582 * SASL SSF layers are enabled (thus requiring decryption calls) 1583 * Returns 0 on success, -1 if client disconnected 1584 */ 1585 static int vnc_client_read(VncState *vs) 1586 { 1587 size_t sz; 1588 1589 #ifdef CONFIG_VNC_SASL 1590 if (vs->sasl.conn && vs->sasl.runSSF) 1591 sz = vnc_client_read_sasl(vs); 1592 else 1593 #endif /* CONFIG_VNC_SASL */ 1594 sz = vnc_client_read_plain(vs); 1595 if (!sz) { 1596 if (vs->disconnecting) { 1597 vnc_disconnect_finish(vs); 1598 return -1; 1599 } 1600 return 0; 1601 } 1602 1603 while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) { 1604 size_t len = vs->read_handler_expect; 1605 int ret; 1606 1607 ret = vs->read_handler(vs, vs->input.buffer, len); 1608 if (vs->disconnecting) { 1609 vnc_disconnect_finish(vs); 1610 return -1; 1611 } 1612 1613 if (!ret) { 1614 buffer_advance(&vs->input, len); 1615 } else { 1616 vs->read_handler_expect = ret; 1617 } 1618 } 1619 return 0; 1620 } 1621 1622 gboolean vnc_client_io(QIOChannel *ioc G_GNUC_UNUSED, 1623 GIOCondition condition, void *opaque) 1624 { 1625 VncState *vs = opaque; 1626 1627 assert(vs->magic == VNC_MAGIC); 1628 1629 if (condition & (G_IO_HUP | G_IO_ERR)) { 1630 vnc_disconnect_start(vs); 1631 return TRUE; 1632 } 1633 1634 if (condition & G_IO_IN) { 1635 if (vnc_client_read(vs) < 0) { 1636 /* vs is free()ed here */ 1637 return TRUE; 1638 } 1639 } 1640 if (condition & G_IO_OUT) { 1641 vnc_client_write(vs); 1642 } 1643 1644 if (vs->disconnecting) { 1645 if (vs->ioc_tag != 0) { 1646 g_source_remove(vs->ioc_tag); 1647 } 1648 vs->ioc_tag = 0; 1649 } 1650 return TRUE; 1651 } 1652 1653 1654 /* 1655 * Scale factor to apply to vs->throttle_output_offset when checking for 1656 * hard limit. Worst case normal usage could be x2, if we have a complete 1657 * incremental update and complete forced update in the output buffer. 1658 * So x3 should be good enough, but we pick x5 to be conservative and thus 1659 * (hopefully) never trigger incorrectly. 1660 */ 1661 #define VNC_THROTTLE_OUTPUT_LIMIT_SCALE 5 1662 1663 void vnc_write(VncState *vs, const void *data, size_t len) 1664 { 1665 assert(vs->magic == VNC_MAGIC); 1666 if (vs->disconnecting) { 1667 return; 1668 } 1669 /* Protection against malicious client/guest to prevent our output 1670 * buffer growing without bound if client stops reading data. This 1671 * should rarely trigger, because we have earlier throttling code 1672 * which stops issuing framebuffer updates and drops audio data 1673 * if the throttle_output_offset value is exceeded. So we only reach 1674 * this higher level if a huge number of pseudo-encodings get 1675 * triggered while data can't be sent on the socket. 1676 * 1677 * NB throttle_output_offset can be zero during early protocol 1678 * handshake, or from the job thread's VncState clone 1679 */ 1680 if (vs->throttle_output_offset != 0 && 1681 (vs->output.offset / VNC_THROTTLE_OUTPUT_LIMIT_SCALE) > 1682 vs->throttle_output_offset) { 1683 trace_vnc_client_output_limit(vs, vs->ioc, vs->output.offset, 1684 vs->throttle_output_offset); 1685 vnc_disconnect_start(vs); 1686 return; 1687 } 1688 buffer_reserve(&vs->output, len); 1689 1690 if (vs->ioc != NULL && buffer_empty(&vs->output)) { 1691 if (vs->ioc_tag) { 1692 g_source_remove(vs->ioc_tag); 1693 } 1694 vs->ioc_tag = qio_channel_add_watch( 1695 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_OUT, 1696 vnc_client_io, vs, NULL); 1697 } 1698 1699 buffer_append(&vs->output, data, len); 1700 } 1701 1702 void vnc_write_s32(VncState *vs, int32_t value) 1703 { 1704 vnc_write_u32(vs, *(uint32_t *)&value); 1705 } 1706 1707 void vnc_write_u32(VncState *vs, uint32_t value) 1708 { 1709 uint8_t buf[4]; 1710 1711 buf[0] = (value >> 24) & 0xFF; 1712 buf[1] = (value >> 16) & 0xFF; 1713 buf[2] = (value >> 8) & 0xFF; 1714 buf[3] = value & 0xFF; 1715 1716 vnc_write(vs, buf, 4); 1717 } 1718 1719 void vnc_write_u16(VncState *vs, uint16_t value) 1720 { 1721 uint8_t buf[2]; 1722 1723 buf[0] = (value >> 8) & 0xFF; 1724 buf[1] = value & 0xFF; 1725 1726 vnc_write(vs, buf, 2); 1727 } 1728 1729 void vnc_write_u8(VncState *vs, uint8_t value) 1730 { 1731 vnc_write(vs, (char *)&value, 1); 1732 } 1733 1734 void vnc_flush(VncState *vs) 1735 { 1736 vnc_lock_output(vs); 1737 if (vs->ioc != NULL && vs->output.offset) { 1738 vnc_client_write_locked(vs); 1739 } 1740 if (vs->disconnecting) { 1741 if (vs->ioc_tag != 0) { 1742 g_source_remove(vs->ioc_tag); 1743 } 1744 vs->ioc_tag = 0; 1745 } 1746 vnc_unlock_output(vs); 1747 } 1748 1749 static uint8_t read_u8(uint8_t *data, size_t offset) 1750 { 1751 return data[offset]; 1752 } 1753 1754 static uint16_t read_u16(uint8_t *data, size_t offset) 1755 { 1756 return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF); 1757 } 1758 1759 static int32_t read_s32(uint8_t *data, size_t offset) 1760 { 1761 return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) | 1762 (data[offset + 2] << 8) | data[offset + 3]); 1763 } 1764 1765 uint32_t read_u32(uint8_t *data, size_t offset) 1766 { 1767 return ((data[offset] << 24) | (data[offset + 1] << 16) | 1768 (data[offset + 2] << 8) | data[offset + 3]); 1769 } 1770 1771 static void check_pointer_type_change(Notifier *notifier, void *data) 1772 { 1773 VncState *vs = container_of(notifier, VncState, mouse_mode_notifier); 1774 int absolute = qemu_input_is_absolute(vs->vd->dcl.con); 1775 1776 if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE) && vs->absolute != absolute) { 1777 vnc_lock_output(vs); 1778 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 1779 vnc_write_u8(vs, 0); 1780 vnc_write_u16(vs, 1); 1781 vnc_framebuffer_update(vs, absolute, 0, 1782 pixman_image_get_width(vs->vd->server), 1783 pixman_image_get_height(vs->vd->server), 1784 VNC_ENCODING_POINTER_TYPE_CHANGE); 1785 vnc_unlock_output(vs); 1786 vnc_flush(vs); 1787 } 1788 vs->absolute = absolute; 1789 } 1790 1791 static void pointer_event(VncState *vs, int button_mask, int x, int y) 1792 { 1793 static uint32_t bmap[INPUT_BUTTON__MAX] = { 1794 [INPUT_BUTTON_LEFT] = 0x01, 1795 [INPUT_BUTTON_MIDDLE] = 0x02, 1796 [INPUT_BUTTON_RIGHT] = 0x04, 1797 [INPUT_BUTTON_WHEEL_UP] = 0x08, 1798 [INPUT_BUTTON_WHEEL_DOWN] = 0x10, 1799 }; 1800 QemuConsole *con = vs->vd->dcl.con; 1801 int width = pixman_image_get_width(vs->vd->server); 1802 int height = pixman_image_get_height(vs->vd->server); 1803 1804 if (vs->last_bmask != button_mask) { 1805 qemu_input_update_buttons(con, bmap, vs->last_bmask, button_mask); 1806 vs->last_bmask = button_mask; 1807 } 1808 1809 if (vs->absolute) { 1810 qemu_input_queue_abs(con, INPUT_AXIS_X, x, 0, width); 1811 qemu_input_queue_abs(con, INPUT_AXIS_Y, y, 0, height); 1812 } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) { 1813 qemu_input_queue_rel(con, INPUT_AXIS_X, x - 0x7FFF); 1814 qemu_input_queue_rel(con, INPUT_AXIS_Y, y - 0x7FFF); 1815 } else { 1816 if (vs->last_x != -1) { 1817 qemu_input_queue_rel(con, INPUT_AXIS_X, x - vs->last_x); 1818 qemu_input_queue_rel(con, INPUT_AXIS_Y, y - vs->last_y); 1819 } 1820 vs->last_x = x; 1821 vs->last_y = y; 1822 } 1823 qemu_input_event_sync(); 1824 } 1825 1826 static void press_key(VncState *vs, QKeyCode qcode) 1827 { 1828 qkbd_state_key_event(vs->vd->kbd, qcode, true); 1829 qkbd_state_key_event(vs->vd->kbd, qcode, false); 1830 } 1831 1832 static void vnc_led_state_change(VncState *vs) 1833 { 1834 if (!vnc_has_feature(vs, VNC_FEATURE_LED_STATE)) { 1835 return; 1836 } 1837 1838 vnc_lock_output(vs); 1839 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 1840 vnc_write_u8(vs, 0); 1841 vnc_write_u16(vs, 1); 1842 vnc_framebuffer_update(vs, 0, 0, 1, 1, VNC_ENCODING_LED_STATE); 1843 vnc_write_u8(vs, vs->vd->ledstate); 1844 vnc_unlock_output(vs); 1845 vnc_flush(vs); 1846 } 1847 1848 static void kbd_leds(void *opaque, int ledstate) 1849 { 1850 VncDisplay *vd = opaque; 1851 VncState *client; 1852 1853 trace_vnc_key_guest_leds((ledstate & QEMU_CAPS_LOCK_LED), 1854 (ledstate & QEMU_NUM_LOCK_LED), 1855 (ledstate & QEMU_SCROLL_LOCK_LED)); 1856 1857 if (ledstate == vd->ledstate) { 1858 return; 1859 } 1860 1861 vd->ledstate = ledstate; 1862 1863 QTAILQ_FOREACH(client, &vd->clients, next) { 1864 vnc_led_state_change(client); 1865 } 1866 } 1867 1868 static void do_key_event(VncState *vs, int down, int keycode, int sym) 1869 { 1870 QKeyCode qcode = qemu_input_key_number_to_qcode(keycode); 1871 1872 /* QEMU console switch */ 1873 switch (qcode) { 1874 case Q_KEY_CODE_1 ... Q_KEY_CODE_9: /* '1' to '9' keys */ 1875 if (vs->vd->dcl.con == NULL && down && 1876 qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_CTRL) && 1877 qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_ALT)) { 1878 /* Reset the modifiers sent to the current console */ 1879 qkbd_state_lift_all_keys(vs->vd->kbd); 1880 console_select(qcode - Q_KEY_CODE_1); 1881 return; 1882 } 1883 default: 1884 break; 1885 } 1886 1887 /* Turn off the lock state sync logic if the client support the led 1888 state extension. 1889 */ 1890 if (down && vs->vd->lock_key_sync && 1891 !vnc_has_feature(vs, VNC_FEATURE_LED_STATE) && 1892 keycode_is_keypad(vs->vd->kbd_layout, keycode)) { 1893 /* If the numlock state needs to change then simulate an additional 1894 keypress before sending this one. This will happen if the user 1895 toggles numlock away from the VNC window. 1896 */ 1897 if (keysym_is_numlock(vs->vd->kbd_layout, sym & 0xFFFF)) { 1898 if (!qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_NUMLOCK)) { 1899 trace_vnc_key_sync_numlock(true); 1900 press_key(vs, Q_KEY_CODE_NUM_LOCK); 1901 } 1902 } else { 1903 if (qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_NUMLOCK)) { 1904 trace_vnc_key_sync_numlock(false); 1905 press_key(vs, Q_KEY_CODE_NUM_LOCK); 1906 } 1907 } 1908 } 1909 1910 if (down && vs->vd->lock_key_sync && 1911 !vnc_has_feature(vs, VNC_FEATURE_LED_STATE) && 1912 ((sym >= 'A' && sym <= 'Z') || (sym >= 'a' && sym <= 'z'))) { 1913 /* If the capslock state needs to change then simulate an additional 1914 keypress before sending this one. This will happen if the user 1915 toggles capslock away from the VNC window. 1916 */ 1917 int uppercase = !!(sym >= 'A' && sym <= 'Z'); 1918 bool shift = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_SHIFT); 1919 bool capslock = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_CAPSLOCK); 1920 if (capslock) { 1921 if (uppercase == shift) { 1922 trace_vnc_key_sync_capslock(false); 1923 press_key(vs, Q_KEY_CODE_CAPS_LOCK); 1924 } 1925 } else { 1926 if (uppercase != shift) { 1927 trace_vnc_key_sync_capslock(true); 1928 press_key(vs, Q_KEY_CODE_CAPS_LOCK); 1929 } 1930 } 1931 } 1932 1933 qkbd_state_key_event(vs->vd->kbd, qcode, down); 1934 if (!qemu_console_is_graphic(NULL)) { 1935 bool numlock = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_NUMLOCK); 1936 bool control = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_CTRL); 1937 /* QEMU console emulation */ 1938 if (down) { 1939 switch (keycode) { 1940 case 0x2a: /* Left Shift */ 1941 case 0x36: /* Right Shift */ 1942 case 0x1d: /* Left CTRL */ 1943 case 0x9d: /* Right CTRL */ 1944 case 0x38: /* Left ALT */ 1945 case 0xb8: /* Right ALT */ 1946 break; 1947 case 0xc8: 1948 qemu_text_console_put_keysym(NULL, QEMU_KEY_UP); 1949 break; 1950 case 0xd0: 1951 qemu_text_console_put_keysym(NULL, QEMU_KEY_DOWN); 1952 break; 1953 case 0xcb: 1954 qemu_text_console_put_keysym(NULL, QEMU_KEY_LEFT); 1955 break; 1956 case 0xcd: 1957 qemu_text_console_put_keysym(NULL, QEMU_KEY_RIGHT); 1958 break; 1959 case 0xd3: 1960 qemu_text_console_put_keysym(NULL, QEMU_KEY_DELETE); 1961 break; 1962 case 0xc7: 1963 qemu_text_console_put_keysym(NULL, QEMU_KEY_HOME); 1964 break; 1965 case 0xcf: 1966 qemu_text_console_put_keysym(NULL, QEMU_KEY_END); 1967 break; 1968 case 0xc9: 1969 qemu_text_console_put_keysym(NULL, QEMU_KEY_PAGEUP); 1970 break; 1971 case 0xd1: 1972 qemu_text_console_put_keysym(NULL, QEMU_KEY_PAGEDOWN); 1973 break; 1974 1975 case 0x47: 1976 qemu_text_console_put_keysym(NULL, numlock ? '7' : QEMU_KEY_HOME); 1977 break; 1978 case 0x48: 1979 qemu_text_console_put_keysym(NULL, numlock ? '8' : QEMU_KEY_UP); 1980 break; 1981 case 0x49: 1982 qemu_text_console_put_keysym(NULL, numlock ? '9' : QEMU_KEY_PAGEUP); 1983 break; 1984 case 0x4b: 1985 qemu_text_console_put_keysym(NULL, numlock ? '4' : QEMU_KEY_LEFT); 1986 break; 1987 case 0x4c: 1988 qemu_text_console_put_keysym(NULL, '5'); 1989 break; 1990 case 0x4d: 1991 qemu_text_console_put_keysym(NULL, numlock ? '6' : QEMU_KEY_RIGHT); 1992 break; 1993 case 0x4f: 1994 qemu_text_console_put_keysym(NULL, numlock ? '1' : QEMU_KEY_END); 1995 break; 1996 case 0x50: 1997 qemu_text_console_put_keysym(NULL, numlock ? '2' : QEMU_KEY_DOWN); 1998 break; 1999 case 0x51: 2000 qemu_text_console_put_keysym(NULL, numlock ? '3' : QEMU_KEY_PAGEDOWN); 2001 break; 2002 case 0x52: 2003 qemu_text_console_put_keysym(NULL, '0'); 2004 break; 2005 case 0x53: 2006 qemu_text_console_put_keysym(NULL, numlock ? '.' : QEMU_KEY_DELETE); 2007 break; 2008 2009 case 0xb5: 2010 qemu_text_console_put_keysym(NULL, '/'); 2011 break; 2012 case 0x37: 2013 qemu_text_console_put_keysym(NULL, '*'); 2014 break; 2015 case 0x4a: 2016 qemu_text_console_put_keysym(NULL, '-'); 2017 break; 2018 case 0x4e: 2019 qemu_text_console_put_keysym(NULL, '+'); 2020 break; 2021 case 0x9c: 2022 qemu_text_console_put_keysym(NULL, '\n'); 2023 break; 2024 2025 default: 2026 if (control) { 2027 qemu_text_console_put_keysym(NULL, sym & 0x1f); 2028 } else { 2029 qemu_text_console_put_keysym(NULL, sym); 2030 } 2031 break; 2032 } 2033 } 2034 } 2035 } 2036 2037 static const char *code2name(int keycode) 2038 { 2039 return QKeyCode_str(qemu_input_key_number_to_qcode(keycode)); 2040 } 2041 2042 static void key_event(VncState *vs, int down, uint32_t sym) 2043 { 2044 int keycode; 2045 int lsym = sym; 2046 2047 if (lsym >= 'A' && lsym <= 'Z' && qemu_console_is_graphic(NULL)) { 2048 lsym = lsym - 'A' + 'a'; 2049 } 2050 2051 keycode = keysym2scancode(vs->vd->kbd_layout, lsym & 0xFFFF, 2052 vs->vd->kbd, down) & SCANCODE_KEYMASK; 2053 trace_vnc_key_event_map(down, sym, keycode, code2name(keycode)); 2054 do_key_event(vs, down, keycode, sym); 2055 } 2056 2057 static void ext_key_event(VncState *vs, int down, 2058 uint32_t sym, uint16_t keycode) 2059 { 2060 /* if the user specifies a keyboard layout, always use it */ 2061 if (keyboard_layout) { 2062 key_event(vs, down, sym); 2063 } else { 2064 trace_vnc_key_event_ext(down, sym, keycode, code2name(keycode)); 2065 do_key_event(vs, down, keycode, sym); 2066 } 2067 } 2068 2069 static void framebuffer_update_request(VncState *vs, int incremental, 2070 int x, int y, int w, int h) 2071 { 2072 if (incremental) { 2073 if (vs->update != VNC_STATE_UPDATE_FORCE) { 2074 vs->update = VNC_STATE_UPDATE_INCREMENTAL; 2075 } 2076 } else { 2077 vs->update = VNC_STATE_UPDATE_FORCE; 2078 vnc_set_area_dirty(vs->dirty, vs->vd, x, y, w, h); 2079 if (vnc_has_feature(vs, VNC_FEATURE_RESIZE_EXT)) { 2080 vnc_desktop_resize_ext(vs, 0); 2081 } 2082 } 2083 } 2084 2085 static void send_ext_key_event_ack(VncState *vs) 2086 { 2087 vnc_lock_output(vs); 2088 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 2089 vnc_write_u8(vs, 0); 2090 vnc_write_u16(vs, 1); 2091 vnc_framebuffer_update(vs, 0, 0, 2092 pixman_image_get_width(vs->vd->server), 2093 pixman_image_get_height(vs->vd->server), 2094 VNC_ENCODING_EXT_KEY_EVENT); 2095 vnc_unlock_output(vs); 2096 vnc_flush(vs); 2097 } 2098 2099 static void send_ext_audio_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_AUDIO); 2109 vnc_unlock_output(vs); 2110 vnc_flush(vs); 2111 } 2112 2113 static void send_xvp_message(VncState *vs, int code) 2114 { 2115 vnc_lock_output(vs); 2116 vnc_write_u8(vs, VNC_MSG_SERVER_XVP); 2117 vnc_write_u8(vs, 0); /* pad */ 2118 vnc_write_u8(vs, 1); /* version */ 2119 vnc_write_u8(vs, code); 2120 vnc_unlock_output(vs); 2121 vnc_flush(vs); 2122 } 2123 2124 static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings) 2125 { 2126 int i; 2127 unsigned int enc = 0; 2128 2129 vs->features = 0; 2130 vs->vnc_encoding = 0; 2131 vs->tight->compression = 9; 2132 vs->tight->quality = -1; /* Lossless by default */ 2133 vs->absolute = -1; 2134 2135 /* 2136 * Start from the end because the encodings are sent in order of preference. 2137 * This way the preferred encoding (first encoding defined in the array) 2138 * will be set at the end of the loop. 2139 */ 2140 for (i = n_encodings - 1; i >= 0; i--) { 2141 enc = encodings[i]; 2142 switch (enc) { 2143 case VNC_ENCODING_RAW: 2144 vs->vnc_encoding = enc; 2145 break; 2146 case VNC_ENCODING_HEXTILE: 2147 vnc_set_feature(vs, VNC_FEATURE_HEXTILE); 2148 vs->vnc_encoding = enc; 2149 break; 2150 case VNC_ENCODING_TIGHT: 2151 vnc_set_feature(vs, VNC_FEATURE_TIGHT); 2152 vs->vnc_encoding = enc; 2153 break; 2154 #ifdef CONFIG_PNG 2155 case VNC_ENCODING_TIGHT_PNG: 2156 vnc_set_feature(vs, VNC_FEATURE_TIGHT_PNG); 2157 vs->vnc_encoding = enc; 2158 break; 2159 #endif 2160 case VNC_ENCODING_ZLIB: 2161 /* 2162 * VNC_ENCODING_ZRLE compresses better than VNC_ENCODING_ZLIB. 2163 * So prioritize ZRLE, even if the client hints that it prefers 2164 * ZLIB. 2165 */ 2166 if (!vnc_has_feature(vs, VNC_FEATURE_ZRLE)) { 2167 vnc_set_feature(vs, VNC_FEATURE_ZLIB); 2168 vs->vnc_encoding = enc; 2169 } 2170 break; 2171 case VNC_ENCODING_ZRLE: 2172 vnc_set_feature(vs, VNC_FEATURE_ZRLE); 2173 vs->vnc_encoding = enc; 2174 break; 2175 case VNC_ENCODING_ZYWRLE: 2176 vnc_set_feature(vs, VNC_FEATURE_ZYWRLE); 2177 vs->vnc_encoding = enc; 2178 break; 2179 case VNC_ENCODING_DESKTOPRESIZE: 2180 vnc_set_feature(vs, VNC_FEATURE_RESIZE); 2181 break; 2182 case VNC_ENCODING_DESKTOP_RESIZE_EXT: 2183 vnc_set_feature(vs, VNC_FEATURE_RESIZE_EXT); 2184 break; 2185 case VNC_ENCODING_POINTER_TYPE_CHANGE: 2186 vnc_set_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE); 2187 break; 2188 case VNC_ENCODING_RICH_CURSOR: 2189 vnc_set_feature(vs, VNC_FEATURE_RICH_CURSOR); 2190 break; 2191 case VNC_ENCODING_ALPHA_CURSOR: 2192 vnc_set_feature(vs, VNC_FEATURE_ALPHA_CURSOR); 2193 break; 2194 case VNC_ENCODING_EXT_KEY_EVENT: 2195 send_ext_key_event_ack(vs); 2196 break; 2197 case VNC_ENCODING_AUDIO: 2198 if (vs->vd->audio_state) { 2199 vnc_set_feature(vs, VNC_FEATURE_AUDIO); 2200 send_ext_audio_ack(vs); 2201 } 2202 break; 2203 case VNC_ENCODING_WMVi: 2204 vnc_set_feature(vs, VNC_FEATURE_WMVI); 2205 break; 2206 case VNC_ENCODING_LED_STATE: 2207 vnc_set_feature(vs, VNC_FEATURE_LED_STATE); 2208 break; 2209 case VNC_ENCODING_XVP: 2210 if (vs->vd->power_control) { 2211 vnc_set_feature(vs, VNC_FEATURE_XVP); 2212 send_xvp_message(vs, VNC_XVP_CODE_INIT); 2213 } 2214 break; 2215 case VNC_ENCODING_CLIPBOARD_EXT: 2216 vnc_set_feature(vs, VNC_FEATURE_CLIPBOARD_EXT); 2217 vnc_server_cut_text_caps(vs); 2218 break; 2219 case VNC_ENCODING_COMPRESSLEVEL0 ... VNC_ENCODING_COMPRESSLEVEL0 + 9: 2220 vs->tight->compression = (enc & 0x0F); 2221 break; 2222 case VNC_ENCODING_QUALITYLEVEL0 ... VNC_ENCODING_QUALITYLEVEL0 + 9: 2223 if (vs->vd->lossy) { 2224 vs->tight->quality = (enc & 0x0F); 2225 } 2226 break; 2227 default: 2228 VNC_DEBUG("Unknown encoding: %d (0x%.8x): %d\n", i, enc, enc); 2229 break; 2230 } 2231 } 2232 vnc_desktop_resize(vs); 2233 check_pointer_type_change(&vs->mouse_mode_notifier, NULL); 2234 vnc_led_state_change(vs); 2235 vnc_cursor_define(vs); 2236 } 2237 2238 static void set_pixel_conversion(VncState *vs) 2239 { 2240 pixman_format_code_t fmt = qemu_pixman_get_format(&vs->client_pf); 2241 2242 if (fmt == VNC_SERVER_FB_FORMAT) { 2243 vs->write_pixels = vnc_write_pixels_copy; 2244 vnc_hextile_set_pixel_conversion(vs, 0); 2245 } else { 2246 vs->write_pixels = vnc_write_pixels_generic; 2247 vnc_hextile_set_pixel_conversion(vs, 1); 2248 } 2249 } 2250 2251 static void send_color_map(VncState *vs) 2252 { 2253 int i; 2254 2255 vnc_lock_output(vs); 2256 vnc_write_u8(vs, VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES); 2257 vnc_write_u8(vs, 0); /* padding */ 2258 vnc_write_u16(vs, 0); /* first color */ 2259 vnc_write_u16(vs, 256); /* # of colors */ 2260 2261 for (i = 0; i < 256; i++) { 2262 PixelFormat *pf = &vs->client_pf; 2263 2264 vnc_write_u16(vs, (((i >> pf->rshift) & pf->rmax) << (16 - pf->rbits))); 2265 vnc_write_u16(vs, (((i >> pf->gshift) & pf->gmax) << (16 - pf->gbits))); 2266 vnc_write_u16(vs, (((i >> pf->bshift) & pf->bmax) << (16 - pf->bbits))); 2267 } 2268 vnc_unlock_output(vs); 2269 } 2270 2271 static void set_pixel_format(VncState *vs, int bits_per_pixel, 2272 int big_endian_flag, int true_color_flag, 2273 int red_max, int green_max, int blue_max, 2274 int red_shift, int green_shift, int blue_shift) 2275 { 2276 if (!true_color_flag) { 2277 /* Expose a reasonable default 256 color map */ 2278 bits_per_pixel = 8; 2279 red_max = 7; 2280 green_max = 7; 2281 blue_max = 3; 2282 red_shift = 0; 2283 green_shift = 3; 2284 blue_shift = 6; 2285 } 2286 2287 switch (bits_per_pixel) { 2288 case 8: 2289 case 16: 2290 case 32: 2291 break; 2292 default: 2293 vnc_client_error(vs); 2294 return; 2295 } 2296 2297 vs->client_pf.rmax = red_max ? red_max : 0xFF; 2298 vs->client_pf.rbits = ctpopl(red_max); 2299 vs->client_pf.rshift = red_shift; 2300 vs->client_pf.rmask = red_max << red_shift; 2301 vs->client_pf.gmax = green_max ? green_max : 0xFF; 2302 vs->client_pf.gbits = ctpopl(green_max); 2303 vs->client_pf.gshift = green_shift; 2304 vs->client_pf.gmask = green_max << green_shift; 2305 vs->client_pf.bmax = blue_max ? blue_max : 0xFF; 2306 vs->client_pf.bbits = ctpopl(blue_max); 2307 vs->client_pf.bshift = blue_shift; 2308 vs->client_pf.bmask = blue_max << blue_shift; 2309 vs->client_pf.bits_per_pixel = bits_per_pixel; 2310 vs->client_pf.bytes_per_pixel = bits_per_pixel / 8; 2311 vs->client_pf.depth = bits_per_pixel == 32 ? 24 : bits_per_pixel; 2312 vs->client_be = big_endian_flag; 2313 2314 if (!true_color_flag) { 2315 send_color_map(vs); 2316 } 2317 2318 set_pixel_conversion(vs); 2319 2320 graphic_hw_invalidate(vs->vd->dcl.con); 2321 graphic_hw_update(vs->vd->dcl.con); 2322 } 2323 2324 static void pixel_format_message (VncState *vs) { 2325 char pad[3] = { 0, 0, 0 }; 2326 2327 vs->client_pf = qemu_default_pixelformat(32); 2328 2329 vnc_write_u8(vs, vs->client_pf.bits_per_pixel); /* bits-per-pixel */ 2330 vnc_write_u8(vs, vs->client_pf.depth); /* depth */ 2331 2332 #if HOST_BIG_ENDIAN 2333 vnc_write_u8(vs, 1); /* big-endian-flag */ 2334 #else 2335 vnc_write_u8(vs, 0); /* big-endian-flag */ 2336 #endif 2337 vnc_write_u8(vs, 1); /* true-color-flag */ 2338 vnc_write_u16(vs, vs->client_pf.rmax); /* red-max */ 2339 vnc_write_u16(vs, vs->client_pf.gmax); /* green-max */ 2340 vnc_write_u16(vs, vs->client_pf.bmax); /* blue-max */ 2341 vnc_write_u8(vs, vs->client_pf.rshift); /* red-shift */ 2342 vnc_write_u8(vs, vs->client_pf.gshift); /* green-shift */ 2343 vnc_write_u8(vs, vs->client_pf.bshift); /* blue-shift */ 2344 vnc_write(vs, pad, 3); /* padding */ 2345 2346 vnc_hextile_set_pixel_conversion(vs, 0); 2347 vs->write_pixels = vnc_write_pixels_copy; 2348 } 2349 2350 static void vnc_colordepth(VncState *vs) 2351 { 2352 if (vnc_has_feature(vs, VNC_FEATURE_WMVI)) { 2353 /* Sending a WMVi message to notify the client*/ 2354 vnc_lock_output(vs); 2355 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 2356 vnc_write_u8(vs, 0); 2357 vnc_write_u16(vs, 1); /* number of rects */ 2358 vnc_framebuffer_update(vs, 0, 0, 2359 vs->client_width, 2360 vs->client_height, 2361 VNC_ENCODING_WMVi); 2362 pixel_format_message(vs); 2363 vnc_unlock_output(vs); 2364 vnc_flush(vs); 2365 } else { 2366 set_pixel_conversion(vs); 2367 } 2368 } 2369 2370 static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len) 2371 { 2372 int i; 2373 uint16_t limit; 2374 uint32_t freq; 2375 VncDisplay *vd = vs->vd; 2376 2377 if (data[0] > 3) { 2378 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); 2379 } 2380 2381 switch (data[0]) { 2382 case VNC_MSG_CLIENT_SET_PIXEL_FORMAT: 2383 if (len == 1) 2384 return 20; 2385 2386 set_pixel_format(vs, read_u8(data, 4), 2387 read_u8(data, 6), read_u8(data, 7), 2388 read_u16(data, 8), read_u16(data, 10), 2389 read_u16(data, 12), read_u8(data, 14), 2390 read_u8(data, 15), read_u8(data, 16)); 2391 break; 2392 case VNC_MSG_CLIENT_SET_ENCODINGS: 2393 if (len == 1) 2394 return 4; 2395 2396 if (len == 4) { 2397 limit = read_u16(data, 2); 2398 if (limit > 0) 2399 return 4 + (limit * 4); 2400 } else 2401 limit = read_u16(data, 2); 2402 2403 for (i = 0; i < limit; i++) { 2404 int32_t val = read_s32(data, 4 + (i * 4)); 2405 memcpy(data + 4 + (i * 4), &val, sizeof(val)); 2406 } 2407 2408 set_encodings(vs, (int32_t *)(data + 4), limit); 2409 break; 2410 case VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST: 2411 if (len == 1) 2412 return 10; 2413 2414 framebuffer_update_request(vs, 2415 read_u8(data, 1), read_u16(data, 2), read_u16(data, 4), 2416 read_u16(data, 6), read_u16(data, 8)); 2417 break; 2418 case VNC_MSG_CLIENT_KEY_EVENT: 2419 if (len == 1) 2420 return 8; 2421 2422 key_event(vs, read_u8(data, 1), read_u32(data, 4)); 2423 break; 2424 case VNC_MSG_CLIENT_POINTER_EVENT: 2425 if (len == 1) 2426 return 6; 2427 2428 pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4)); 2429 break; 2430 case VNC_MSG_CLIENT_CUT_TEXT: 2431 if (len == 1) { 2432 return 8; 2433 } 2434 uint32_t dlen = abs(read_s32(data, 4)); 2435 if (len == 8) { 2436 if (dlen > (1 << 20)) { 2437 error_report("vnc: client_cut_text msg payload has %u bytes" 2438 " which exceeds our limit of 1MB.", dlen); 2439 vnc_client_error(vs); 2440 break; 2441 } 2442 if (dlen > 0) { 2443 return 8 + dlen; 2444 } 2445 } 2446 2447 if (read_s32(data, 4) < 0) { 2448 if (!vnc_has_feature(vs, VNC_FEATURE_CLIPBOARD_EXT)) { 2449 error_report("vnc: extended clipboard message while disabled"); 2450 vnc_client_error(vs); 2451 break; 2452 } 2453 if (dlen < 4) { 2454 error_report("vnc: malformed payload (header less than 4 bytes)" 2455 " in extended clipboard pseudo-encoding."); 2456 vnc_client_error(vs); 2457 break; 2458 } 2459 vnc_client_cut_text_ext(vs, dlen, read_u32(data, 8), data + 12); 2460 break; 2461 } 2462 vnc_client_cut_text(vs, read_u32(data, 4), data + 8); 2463 break; 2464 case VNC_MSG_CLIENT_XVP: 2465 if (!vnc_has_feature(vs, VNC_FEATURE_XVP)) { 2466 error_report("vnc: xvp client message while disabled"); 2467 vnc_client_error(vs); 2468 break; 2469 } 2470 if (len == 1) { 2471 return 4; 2472 } 2473 if (len == 4) { 2474 uint8_t version = read_u8(data, 2); 2475 uint8_t action = read_u8(data, 3); 2476 2477 if (version != 1) { 2478 error_report("vnc: xvp client message version %d != 1", 2479 version); 2480 vnc_client_error(vs); 2481 break; 2482 } 2483 2484 switch (action) { 2485 case VNC_XVP_ACTION_SHUTDOWN: 2486 qemu_system_powerdown_request(); 2487 break; 2488 case VNC_XVP_ACTION_REBOOT: 2489 send_xvp_message(vs, VNC_XVP_CODE_FAIL); 2490 break; 2491 case VNC_XVP_ACTION_RESET: 2492 qemu_system_reset_request(SHUTDOWN_CAUSE_HOST_QMP_SYSTEM_RESET); 2493 break; 2494 default: 2495 send_xvp_message(vs, VNC_XVP_CODE_FAIL); 2496 break; 2497 } 2498 } 2499 break; 2500 case VNC_MSG_CLIENT_QEMU: 2501 if (len == 1) 2502 return 2; 2503 2504 switch (read_u8(data, 1)) { 2505 case VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT: 2506 if (len == 2) 2507 return 12; 2508 2509 ext_key_event(vs, read_u16(data, 2), 2510 read_u32(data, 4), read_u32(data, 8)); 2511 break; 2512 case VNC_MSG_CLIENT_QEMU_AUDIO: 2513 if (!vnc_has_feature(vs, VNC_FEATURE_AUDIO)) { 2514 error_report("Audio message %d with audio disabled", read_u8(data, 2)); 2515 vnc_client_error(vs); 2516 break; 2517 } 2518 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, 2)); 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 w = pixman_image_get_width(vd->server); 3136 tmpbuf = qemu_pixman_linebuf_create(VNC_SERVER_FB_FORMAT, w); 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 uint64_t 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 (hostlen && 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, 10, &baseport) < 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, errp); 4190 if (!vd->audio_state) { 4191 goto fail; 4192 } 4193 } else { 4194 vd->audio_state = audio_get_default_audio_state(NULL); 4195 } 4196 4197 device_id = qemu_opt_get(opts, "display"); 4198 if (device_id) { 4199 int head = qemu_opt_get_number(opts, "head", 0); 4200 Error *err = NULL; 4201 4202 con = qemu_console_lookup_by_device_name(device_id, head, &err); 4203 if (err) { 4204 error_propagate(errp, err); 4205 goto fail; 4206 } 4207 } else { 4208 con = NULL; 4209 } 4210 4211 if (con != vd->dcl.con) { 4212 qkbd_state_free(vd->kbd); 4213 unregister_displaychangelistener(&vd->dcl); 4214 vd->dcl.con = con; 4215 register_displaychangelistener(&vd->dcl); 4216 vd->kbd = qkbd_state_init(vd->dcl.con); 4217 } 4218 qkbd_state_set_delay(vd->kbd, key_delay_ms); 4219 4220 if (saddr_list == NULL) { 4221 return; 4222 } 4223 4224 if (reverse) { 4225 if (vnc_display_connect(vd, saddr_list, wsaddr_list, errp) < 0) { 4226 goto fail; 4227 } 4228 } else { 4229 if (vnc_display_listen(vd, saddr_list, wsaddr_list, errp) < 0) { 4230 goto fail; 4231 } 4232 } 4233 4234 if (qemu_opt_get(opts, "to")) { 4235 vnc_display_print_local_addr(vd); 4236 } 4237 4238 /* Success */ 4239 return; 4240 4241 fail: 4242 vnc_display_close(vd); 4243 } 4244 4245 void vnc_display_add_client(const char *id, int csock, bool skipauth) 4246 { 4247 VncDisplay *vd = vnc_display_find(id); 4248 QIOChannelSocket *sioc; 4249 4250 if (!vd) { 4251 return; 4252 } 4253 4254 sioc = qio_channel_socket_new_fd(csock, NULL); 4255 if (sioc) { 4256 qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-server"); 4257 vnc_connect(vd, sioc, skipauth, false); 4258 object_unref(OBJECT(sioc)); 4259 } 4260 } 4261 4262 static void vnc_auto_assign_id(QemuOptsList *olist, QemuOpts *opts) 4263 { 4264 int i = 2; 4265 char *id; 4266 4267 id = g_strdup("default"); 4268 while (qemu_opts_find(olist, id)) { 4269 g_free(id); 4270 id = g_strdup_printf("vnc%d", i++); 4271 } 4272 qemu_opts_set_id(opts, id); 4273 } 4274 4275 void vnc_parse(const char *str) 4276 { 4277 QemuOptsList *olist = qemu_find_opts("vnc"); 4278 QemuOpts *opts = qemu_opts_parse_noisily(olist, str, !is_help_option(str)); 4279 const char *id; 4280 4281 if (!opts) { 4282 exit(1); 4283 } 4284 4285 id = qemu_opts_id(opts); 4286 if (!id) { 4287 /* auto-assign id if not present */ 4288 vnc_auto_assign_id(olist, opts); 4289 } 4290 } 4291 4292 int vnc_init_func(void *opaque, QemuOpts *opts, Error **errp) 4293 { 4294 Error *local_err = NULL; 4295 char *id = (char *)qemu_opts_id(opts); 4296 4297 assert(id); 4298 vnc_display_init(id, &local_err); 4299 if (local_err) { 4300 error_propagate(errp, local_err); 4301 return -1; 4302 } 4303 vnc_display_open(id, &local_err); 4304 if (local_err != NULL) { 4305 error_propagate(errp, local_err); 4306 return -1; 4307 } 4308 return 0; 4309 } 4310 4311 static void vnc_register_config(void) 4312 { 4313 qemu_add_opts(&qemu_vnc_opts); 4314 } 4315 opts_init(vnc_register_config); 4316